JP7595288B2 - Alarm system - Google Patents

Description

The present disclosure relates generally to an alarm device, and more particularly to an alarm device having an activation unit including a push button and an indicator light.

Patent Document 1 describes storing a fire transmitter and other equipment in an equipment storage box installed on the wall of a building. The fire transmitter is composed of a fire transmitter body equipped with a push button (push button switch) and other components, which is substantially covered by a cover body. When a person who discovers a fire presses the push button on the fire transmitter firmly, a signal notifying the occurrence of a fire is sent to a fire receiver installed in a manager's room or the like and connected to the fire transmitter by wiring. In addition, an alarm sound is emitted from a speaker installed near the fire transmitter, thereby notifying people in the vicinity that a fire has occurred.

The equipment storage box described in Patent Document 1 is described as storing, in addition to the fire alarm, an indicator light (alarm light) that turns on when an alarm occurs, and a speaker (audio unit) that produces an alarm sound.

JP 2005-141536 A

However, in the equipment storage box described in Patent Document 1, a fire alarm including a push button is located at the bottom end, an indicator light is located at the top end, and a speaker is located between the fire alarm and the indicator light, making it difficult to miniaturize the alarm device (equipment storage box).

This disclosure has been made in consideration of the above reasons, and aims to provide an alarm device that is easy to miniaturize.

An alarm device according to one aspect of the present disclosure includes a housing, an activation unit, an indicator light, and a circuit board. The activation unit has a push button including an operation surface arranged on the front surface of the housing, a movable element linked to the push button, and a recovery button. The activation unit moves the movable element from a first position to a second position when the push button is operated so as to press the operation surface. The indicator light has a light-emitting unit arranged on the front surface of the housing. The circuit board is accommodated in the housing. The circuit board outputs an alarm signal when triggered by the movement of the movable element from the first position to the second position. The light-emitting unit is formed in a ring shape surrounding the operation surface in a front view. The recovery button is a button for returning the movable element from the second position to the first position. The recovery button is arranged in an exposed state between the light-emitting unit and the operation surface in a front view.
An alarm device according to one aspect of the present disclosure includes a housing, an activation unit, an indicator light, a circuit board, and a speaker. The activation unit has a push button including an operation surface arranged on the front surface of the housing, and a movable element linked to the push button. The activation unit moves the movable element from a first position to a second position when the push button is operated so as to press the operation surface. The indicator light has a light-emitting unit arranged on the front surface of the housing. The circuit board is housed in the housing. The circuit board outputs an alarm signal when triggered by the movement of the movable element from the first position to the second position. The speaker is housed in the housing. The speaker outputs an alarm sound in response to the alarm signal. The light-emitting unit is formed in a ring shape surrounding the operation surface in a front view. A sound output hole is formed in a specific area of the front wall of the housing corresponding to the speaker. A waterproof sheet is arranged between the specific area and the speaker to block liquid from entering the speaker through the sound output hole. Between the specific area and the waterproof sheet, there is at least a gap that allows vibration of the waterproof sheet. The waterproof sheet is attached to the front wall of the housing at an adhesive part provided on the outer periphery of the specific area so as to surround the center of the specific area. The upper edge of the adhesive part located below the sound output hole and the lower edge of the sound output hole are aligned in the vertical direction.
An alarm device according to one aspect of the present disclosure includes a housing, an activation unit, an indicator light, a circuit board, a speaker, and a decorative member. The activation unit has a push button including an operation surface arranged on the front surface of the housing, and a movable element linked to the push button. The activation unit moves the movable element from a first position to a second position when the push button is operated so as to press the operation surface. The indicator light has a light-emitting unit arranged on the front surface of the housing. The circuit board is housed in the housing. The circuit board outputs an alarm signal when triggered by the movement of the movable element from the first position to the second position. The speaker is housed in the housing. The speaker outputs an alarm sound in response to the alarm signal. The light-emitting unit is formed in a ring shape surrounding the operation surface in a front view. A sound output hole is formed in a specific area of the front wall of the housing corresponding to the speaker. A waterproof sheet is arranged between the specific area and the speaker to block liquid from entering the speaker through the sound output hole. Between the specific area and the waterproof sheet, there is at least a gap that allows vibration of the waterproof sheet. The decorative member is attached to a position on the front surface of the housing that corresponds to the specific area. The decorative member has a plurality of transmission holes that communicate with the sound output hole. The housing has a partition bar at a position that does not overlap with the plurality of transmission holes, which divides the sound output hole into a plurality of zones in a front view.

The present disclosure has the advantage that it is easy to achieve miniaturization.

FIG. 1 is a front view showing an alarm device according to a first embodiment. 2A and 2B are external perspective views of the above alarm device when it is exposed and recessed, respectively. FIG. 3 is an exploded perspective view of the above alarm device. Fig. 4A is a schematic diagram showing an installation state of an alarm device according to a comparative example on a wall, Fig. 4B is a schematic diagram showing an installation state of an alarm device according to embodiment 1 on a wall by exposed installation, and Fig. 4C is a schematic diagram showing an installation state of the same alarm device on a wall by recessed installation. FIG. 5 is an exploded perspective view of the activation unit of the alarm device. FIG. 6 is a cross-sectional view of a main part of the above alarm device. FIG. 7 is a perspective view of a main part of the alarm device. FIG. 8 is an exploded perspective view of a cover, a starting unit, and an indicator lamp of the above alarm device. FIG. 9 is an exploded perspective view of a light body cover, a light guide member, and a diffusion member of the above alarm device. FIG. 10 is a perspective view showing an indicator light of the alarm device. FIG. 11 is an exploded perspective view of the internal unit of the alarm device. 12A and 12B are perspective and front views of a circuit board of the alarm device, respectively; 13A is a front view of the inner container, FIG 13B is a right side view of the inner container, FIG 13C is a rear view of the inner container. FIG. 14 is a schematic diagram showing the positional relationship of components of the inner unit. FIG. 15 is a partially cutaway perspective view of the alarm device. FIG. 16 is a perspective view of a mounting box for the alarm device. FIG. 17 is a front view showing the state in which the inner unit is combined with the mounting box in the alarm device. 18A and 18B are perspective views of the main part, partly broken away, showing the mounting structure of the inner unit to the mounting box of the same, respectively. FIG. 19 is a rear view showing the state in which the cover is combined with the inner unit in the alarm device. FIG. 20 is a perspective view of the essential parts showing the mounting structure of the cover to the inner unit of the above embodiment. Fig. 21A is a cross-sectional view of the alarm device in an exploded state showing the dimensional relationship between the cover, the light body cover, the base member, and the push button of the alarm device of the same Fig. 21B is a cross-sectional view of the alarm device in an assembled state showing the dimensional relationship between the cover, the light body cover, the base member, and the push button of the same 22A and 22B are front and rear views each showing a waterproof area of the inner unit of the same. 23A and 23B are perspective views of the waterproof structure of the alarm device, with a part cut away, showing the waterproof structure of the alarm device. Fig. 24A is a perspective view of a main part showing the waterproof structure of the alarm device, Fig. 24B is an enlarged view, partly cut away, showing area A1 of Fig. 24A. Fig. 25A is a front view showing a main part of an alarm device according to a first modified example of embodiment 1. Fig. 25B is a front view showing a main part of an alarm device according to a second modified example of embodiment 1. Fig. 26A is a cross-sectional view showing a main part of an alarm device according to embodiment 2. Fig. 26B is a perspective view showing an indicator light of the alarm device. FIG. 27 is an exploded perspective view of an alarm device according to the third embodiment. FIG. 28 is an exploded perspective view of the inner unit of the alarm device as viewed obliquely from the front. FIG. 29 is an exploded perspective view of the inner unit of the alarm device as viewed obliquely from behind. Fig. 30A is a cross-sectional view showing a main part of the alarm device, and Fig. 30B is a schematic enlarged view of a region Z1 in Fig. 30A. FIG. 31 is an exploded perspective view of the cover of the alarm device as viewed obliquely from behind. 32A and 32B are schematic views of the main part of the cover of the alarm device as viewed from the rear and front, respectively. FIG. 33 is a conceptual diagram showing how the sound source of the alarm device is reproduced and sound is output from a speaker. Fig. 34A is an explanatory diagram showing the speaker characteristics of the speaker of the alarm device according to embodiment 1 and the speaker characteristics of the thin speaker of the alarm device according to embodiment 3. Fig. 34B is an explanatory diagram showing the frequency of the alarm sound output from the speaker of the alarm device according to embodiment 3. Fig. 35A is a perspective view showing a main part of an alarm device according to embodiment 3. Fig. 35B is an exploded perspective view of the main part of the alarm device according to embodiment 3. Fig. 36A is a schematic diagram showing a main part of a cover of an alarm device according to a first modified example of embodiment 3, viewed from the rear, and Fig. 36B is a cross-sectional view taken along line X1-X1 of Fig. 36A.

(Embodiment 1)
(1) Overview First, an overview of an alarm device 10 according to this embodiment will be described with reference to FIG.

The alarm device 10 according to this embodiment is a device equipped with an activation unit 2 including a push button 21 and an indicator light 3. In this disclosure, the "alarm device" is a device that is installed in a facility for the purpose of, for example, preventing disasters such as fires, preventing the spread of damage caused by disasters, or recovering from a disaster. The activation unit 2 is a unit in which the push button 21 is manually operated when a person discovers a fire. The indicator light 3 indicates the location of the alarm device 10, for example, by being constantly lit.

Such an alarm device 10 is used in facilities. In this embodiment, the alarm device 10 is used in a non-residential facility such as an office building, a school, a welfare facility, a commercial facility, a theme park, a hospital, a hotel, or a factory, but the alarm device 10 may be used in facilities such as an apartment building or a detached house. The alarm device 10 is not limited to being used indoors, and may be used in a specific space in an outdoor facility such as a park or a ground.

The alarm device 10 is installed on a wall or the like of a facility. The alarm device 10 may be installed in a state where almost the entire alarm device 10 is exposed to the wall or the like (exposed installation), or may be installed in a state where the rear part of the alarm device 10 is embedded in the wall (recessed installation). Details will be described later, but this embodiment will basically be described taking as an example a case where the alarm device 10 is "exposed installation."

The alarm device 10 according to this embodiment includes a housing 1, an activation unit 2, an indicator light 3, and a circuit board 4 (see FIG. 3). The activation unit 2 has a push button 21 including an operation surface 211, and a movable element 22 (see FIG. 3) that is linked to the push button 21. The operation surface 211 is disposed on the front surface 101 of the housing 1. When the push button 21 is operated so as to press the operation surface 211, the movable element 22 of the activation unit 2 moves from a first position to a second position (see FIG. 6). The indicator light 3 has a light-emitting portion 311 disposed on the front surface 101 of the housing 1. The circuit board 4 is accommodated in the housing 1. The circuit board 4 outputs an alarm signal when triggered by the movement of the movable element 22 from the first position to the second position.

In the alarm device 10 according to this embodiment, the light-emitting unit 311 is formed in a ring shape surrounding the operation surface 211 when viewed from the front.

In the alarm device 10 according to this embodiment, the indicator light 3 further includes a light source unit 32 (see FIG. 6) and a light guide member 33 (see FIG. 3) in addition to the light-emitting unit 311. The light source unit 32 is accommodated in the housing 1. The light guide member 33 guides light from the light source unit 32 to the light-emitting unit 311, causing the light-emitting unit 311 to emit light.

The alarm device 10 according to this embodiment further includes a speaker 5 in addition to the housing 1, the activation unit 2, the indicator light 3, and the circuit board 4. The speaker 5 is accommodated in the housing 1. The speaker 5 outputs an alarm sound upon receiving an alarm signal. The speaker 5 is located above both the operation surface 211 and the light-emitting unit 311 (in the positive direction of the Z axis).

According to the above-described alarm device 10, the light-emitting unit 311 is formed in a ring shape surrounding the operation surface 211 in a front view. Therefore, the starting unit 2 (its operation surface 211) and the indicator light 3 (its light-emitting unit 311) are arranged together in one location on the front surface 101 of the housing 1. In other words, since the operation surface 211 is arranged inside the light-emitting unit 311, it is easier to make the housing 1 smaller than in a configuration in which the indicator light 3 (light-emitting unit 311) and the operation surface 211 (push button 21) are arranged separately.

According to the warning device 10, the indicator light 3 further includes a light source 32 and a light guide member 33 in addition to the light-emitting unit 311. Therefore, the output light of the light source 32 does not directly enter the light-emitting unit 311, but enters the light-emitting unit 311 via the light guide member 33, making it easier to achieve a relatively uniform light-emitting state over the entire area of the light-emitting unit 311. In other words, compared to a configuration in which the light source 32 directly illuminates the light-emitting unit 311 from behind, a difference in brightness is less likely to occur between the position where the light source 32 is present and the position where the light source 32 is not present when viewed from the front, so that the so-called "grainy feeling" is less likely to occur. As a result, there is an advantage in that the variation in brightness in the light-emitting unit 311 can be kept small.

In addition, according to the above alarm device 10, the speaker 5 that outputs the alarm sound is located above both the operation surface 211 and the light-emitting unit 311 (in the positive direction of the Z axis). That is, the starting unit 2 (operation surface 211), the indicator light 3 (light-emitting unit 311), and the speaker 5 are arranged in the housing 1, and among them, the speaker 5 is arranged in the highest position. Therefore, it is easier to arrange the speaker 5 in a higher position than a configuration in which the starting unit 2 (operation surface 211) is arranged at the lower end of the housing 1, the indicator light 3 (light-emitting unit 311) is arranged at the upper end of the housing 1, and the speaker 5 is arranged between them. In other words, if the installation position of the housing 1 is the same, the speaker 5 is arranged at a higher position by arranging the speaker 5 above both the operation surface 211 and the light-emitting unit 311. As a result, there is an advantage that the speaker 5 can be arranged higher than before and the speaker can be arranged at a position close to the appropriate height.

(2) Details The configuration of the alarm device 10 according to this embodiment will be described below with reference to FIGS. 1 to 24B.

(2.1) Premise The alarm device 10 comprises an activation unit 2, an indicator light 3, a circuit board 4 and a speaker 5 in one housing 1. The alarm device 10 is therefore a "composite device" that not only has the function of the activation unit 2 that accepts human operation, but also the function of displaying with the indicator light 3 and outputting an alarm sound from the speaker 5. Unlike a fire transmitter, a composite device has an integrated display function and an alarm sound output function. In contrast, there are disaster prevention devices such as integrated panels (equipment housing boxes) that combine a fire transmitter and an audio device, but there are at least the following five differences between this type of disaster prevention device and the alarm device 10 which is a composite device.

First, the first difference is that in the alarm device 10, which is a composite device, the activation unit 2 moves the movable element 22 from the first position to the second position, and the movement of the movable element 22 triggers an alarm signal to be output on a circuit board 4 separate from the activation unit 2. In other words, in the alarm device 10, which is a composite device, the activation unit 2 does not have an electronic circuit, so it does not output an electrical signal (alarm signal) in response to the operation of the push button 21, but rather performs a mechanical output by moving the movable element 22. In contrast, in disaster prevention equipment such as an integrated panel, the fire transmitter has an electronic circuit, and the fire transmitter itself outputs an electrical signal in response to the operation of the push button. Therefore, the activation unit 2 of the alarm device 10, which is a composite device, is smaller than the fire transmitter because it does not have an electronic circuit built in.

The second difference is that the alarm device 10, which is a composite device, is basically configured to be able to operate on its own, whereas a disaster prevention device such as an integrated panel is a device that works in conjunction with a receiver of an automatic fire alarm system. In other words, a disaster prevention device such as an integrated panel is used as one component of an automatic fire alarm system that includes a detector such as a heat detector, smoke detector, or flame detector, and a receiver that receives an alarm signal (fire signal) from the detector.

The third difference is that the alarm device 10, which is a composite device, is equipped with a storage battery 7 (see FIG. 3), which will be described later, and can operate on the power of the storage battery 7 even in a situation where the external power supply is cut off due to a power outage or the like. In contrast, disaster prevention equipment such as the integrated panel operates on power supplied from the receiver of the automatic fire alarm system.

The fourth difference is that the alarm device 10, which is a composite device, has a speaker 5 as an audio device that outputs an alarm sound consisting of an electronic sound. In other words, the speaker 5 is driven by an audio circuit mounted on the circuit board 4, and outputs (plays) an alarm sound upon receiving an electrical signal from the audio circuit. In contrast, disaster prevention equipment such as a comprehensive panel has a bell as an audio device, and outputs an alarm sound by ringing the bell rather than an electronic sound.

The fifth difference is that the alarm device 10, which is a composite device, further comprises a test operation unit 8 (see FIG. 1) that accepts test operations, in addition to the activation unit 2 having the push button 21. The test operation unit 8 is for testing the operation of the storage battery 7. In other words, when an operation is performed on the test operation unit 8, the alarm device 10 performs an operation test, such as a remaining charge test of the storage battery 7. In contrast, disaster prevention equipment such as a general panel does not have a test operation unit.

In addition, in this embodiment, as an example, the alarm device 10 is installed on a wall W1 of the facility (see Figures 4A to 4C). In other words, the wall W1 of the facility constitutes the mounting target on which the alarm device 10 is attached. In particular, in this embodiment, it is assumed that the alarm device 10 is installed on the wall W1 that is the exterior wall of the facility. In other words, it is assumed that the alarm device 10 is used outdoors.

Furthermore, in this embodiment, the alarm device 10 is basically described as being "exposed installation". In exposed installation, the alarm device 10 is installed on the wall W1 using a mounting box 6 (see FIG. 2A) that is fixed to the wall W1.

In the following, the direction perpendicular (orthogonal) to the horizontal plane when the alarm device 10 is attached to the wall W1 to be attached is referred to as the "up-down direction", and the downward direction in the up-down direction is referred to as the "downward direction". The thickness direction of the wall W1 is referred to as the "front-rear direction", and the side of the alarm device 10 as viewed from the wall W1 is referred to as the "forward direction". Furthermore, when viewing the alarm device 10 from the front, the right side is referred to as the "right side" and the left side is referred to as the "left side". In the drawings, directions are shown using three mutually orthogonal axes, the X-axis, the Y-axis, and the Z-axis. The X-axis corresponds to the left-right direction, and the positive direction of the X-axis corresponds to the "right side". The Y-axis corresponds to the front-rear direction, and the positive direction of the Y-axis corresponds to the "rear". The Z-axis corresponds to the up-down direction, and the positive direction of the Z-axis corresponds to the "upward direction". However, the X-axis, the Y-axis, and the Z-axis in the drawings are merely indicated for the purpose of explanation and do not have any substance. Furthermore, these directions are not intended to limit the direction in which the alarm device 10 can be used (installed).

In addition, unless otherwise specified, directions such as "above" and "below" in this disclosure refer to the directions when the alarm device is installed on a mounting target such as a wall. In other words, "above" is the positive direction of the Z axis, and "below" is the negative direction of the Z axis. For example, "A is located above B" means that A is located above B when the alarm device is installed, or in other words, A is located at a higher position (farther from the floor or ground) than B.

Further, the "appropriate height" for the placement of the speaker 5 in the present disclosure means a vertical position (height) at which a person can easily recognize the sound output from the speaker 5. In other words, a height close to the height of an average person's ears can be the "appropriate height" for the placement of the speaker 5. On the other hand, the alarm device 10 is provided with a push button 21, and an appropriate mounting height for the alarm device 10 is determined so that even a relatively short child can operate the push button 21. If such an appropriate mounting height is satisfied for the alarm device 10, the alarm device 10 will be mounted at a position slightly lower than the height of an average adult. Therefore, for example, if the speaker 5 is located near the center of the alarm device 10 in the vertical direction, the position of the speaker 5 will be slightly lower than the appropriate height. In contrast, in the alarm device 10 according to this embodiment,
Since the speaker 5 is disposed in a position within the alarm device 10 that is higher than both the activation unit 2 (the operation surface 211) and the indicator light 3 (the light-emitting portion 311), it is easy to place the speaker 5 at a position close to the appropriate height.

In addition, the "center" in this disclosure includes a point (center point) that is equidistant from the surroundings and the surrounding area, i.e., it can include cases where it is essentially the center. For example, when A is said to be at the center of B, the center point of A and the center point of B do not have to completely coincide. In other words, when A is said to be at the center of B, it is sufficient that the center point of A and the center point of B approximately coincide, and the center point of A and the center point of B may be slightly offset from each other.

In addition, "flush" in this disclosure does not only mean that they are exactly on the same plane, but also includes that they are approximately on the same plane, i.e. that they are essentially flush. For example, when A and B are said to be flush, A and B do not have to be completely on the same plane. In other words, when A and B are said to be flush, A only needs to be on approximately the same plane as B, and A may protrude (stick out) slightly more than B, or A may be slightly recessed more than B.

(2.2) Overall Configuration First, the overall configuration of the alarm device 10 will be described with reference to FIGS. 1 to 4C.

In this embodiment, the alarm device 10 includes the activation unit 2 and the indicator light 3 as described above. In addition to the activation unit 2 and the indicator light 3, the housing 1 also contains, for example, a circuit board 4 and a speaker 5.

In addition, in this embodiment, as described above, the alarm device 10 is installed on the wall W1 of the facility to which it is to be attached, by "exposed installation" in which the alarm device 10 is substantially entirely exposed. In exposed installation, the alarm device 10 is installed on the wall W1 by being attached to a mounting box 6 (see FIG. 2A) that is fixed to the wall W1. In this embodiment, the mounting box 6 is included as a component of the alarm device 10. That is, the alarm device 10 according to this embodiment further comprises the mounting box 6 in addition to the housing 1, the activation unit 2, the indicator light 3, the circuit board 4, and the speaker 5. However, the mounting box 6 does not have to be included as a component of the alarm device 10.

As described above, the alarm device 10 according to this embodiment is a "composite device" that includes the starting unit 2, the indicator light 3, the circuit board 4, and the speaker 5 in a single housing 1. In addition to the housing 1, the starting unit 2, the indicator light 3, the circuit board 4, the speaker 5, and the mounting box 6, the alarm device 10 further includes a storage battery 7 (see FIG. 3) and a test operation unit 8.

Basically, the alarm device 10 operates on power supplied to the circuit board 4 from an external power source (e.g., a system power source). In the normal state, the alarm device 10 indicates the position of the alarm device 10 by keeping the indicator light 3 constantly lit. Furthermore, the alarm device 10 has a push button 21 on the activation unit 2 that can be pressed, and when the push button 21 is pressed, the alarm device 10 transitions from the normal state to the alarm state. In other words, when a person discovers an abnormality such as a fire, the alarm device 10 is activated by pressing the push button 21 on the activation unit 2, and the operating state of the alarm device 10 is switched from the normal state to the alarm state.

That is, the movement of the movable member 22 from the first position to the second position triggers the circuit board 4 to output an alarm signal, switching the operating state of the alarm device 10 from a normal state to an alarm state. When the alarm device 10 enters the alarm state, the speaker 5 outputs an alarm sound (electronic sound) in response to the alarm signal. The alarm signal is transmitted to an external device (such as a receiver for an automatic fire alarm system) connected to the alarm device 10. Furthermore, when the alarm device 10 enters the alarm state, the indicator light 3 may flash.

When the recovery button 23 (see Figure 1) of the start-up unit 2 is operated, the operating state of the alarm device 10 switches from the alarm state to the normal state. Furthermore, when the power supply from an external power source (e.g., a system power source) to the circuit board 4 is stopped due to a power outage or the like, the alarm device 10 realizes the same operation as described above using the power stored in the storage battery 7. Therefore, the alarm device 10 can operate independently. Furthermore, when the test operation unit 8 is operated, the alarm device 10 performs an operation test, such as a test of the remaining capacity of the storage battery 7.

In the alarm device 10 according to this embodiment, the functions of the operation system for accepting human operations are concentrated below the center C1 in the vertical direction (Z-axis direction) on the front surface 101 of the housing 1 when viewed from the front. Specifically, the alarm device 10 includes, as operation system functions, the push button 21 of the activation unit 2 and a test operation section 8 for accepting test operations. Therefore, the operation surface 211 of the push button 21 is located below the center C1 in the vertical direction on the front surface 101 of the housing 1. Furthermore, the test operation section 8 is also located below the center C1 in the vertical direction on the front surface 101 of the housing 1.

In this way, the functions of the operation system are concentrated and positioned below the center C1 in the vertical direction (Z-axis direction) on the front surface 101 of the housing 1, making it easier for even relatively short people, such as children, to use the functions of the operation system. Generally, this type of alarm device 10 is installed so that its center C1 is approximately 150 cm above the floor (or ground). Therefore, with the above arrangement, the functions of the operation system (push button 21 and test operation unit 8) are located at a height of 150 cm or less, improving operability.

Specifically, when the alarm device 10 is installed, it is preferable that the operation system functions (push button 21 and test operation unit 8) are at a height of 80 cm to 150 cm from the floor (or ground). Here, it is more preferable that the center point of the operation surface 211 of the push button 21 is located at a height of 80 cm to 150 cm from the floor (or ground). In other words, it is preferable that the installation height of the alarm device 10 is determined so that the center point of the operation surface 211 of the push button 21 is located at a height of 80 cm to 150 cm from the floor (or ground).

The test operation unit 8 is disposed on the front surface 101 of the housing 1, between the speaker 5 and the indicator light 3. In other words, in this embodiment, the test operation unit 8 is disposed above the push button 21 of the activation unit 2, and the speaker 5 is disposed further above that.

Figure 2A is an external perspective view of the alarm device 10 when it is installed exposed. In exposed installation, the alarm device 10 is assembled to the mounting box 6, which is a box-shaped mounting box with an open front, with the housing 1 covering the front of the mounting box 6. This gives the alarm device 10 an overall appearance of a roughly rectangular parallelepiped.

On the other hand, FIG. 2B is an external perspective view of the alarm device 10 when it is installed in a recessed manner. In other words, when the alarm device 10 is installed in the wall W1 of the facility to which it is to be attached, with its rear part recessed into the wall W1 of the facility to which it is to be attached, the mounting box 6 is not used. Therefore, the housing 1 forms the outer shell of the alarm device 10. As a result, the alarm device 10 has an overall appearance in which the rear part is slightly smaller when viewed from the front.

Figure 3 is an exploded perspective view of the alarm device 10 (including the mounting box 6). As is clear from Figure 3, the housing 1 has a body 11 and a cover 12. The cover 12 is attached to the body 11 so as to cover the front of the body 11. The storage battery 7 and other components are housed in the space surrounded by the body 11 and the cover 12. As will be described in more detail later, the cover 12 is fixed to the body 11 with a screw 131 and an insert nut 132.

The body 11 further has a flat plate portion 111, a housing portion 112 that protrudes rearward from the rear surface of the flat plate portion 111, and a back cover portion 113 that covers the rear surface of the housing portion 112. The circuit board 4, speaker 5, etc. are housed in the space surrounded by the flat plate portion 111, housing portion 112, and back cover portion 113. The flat plate portion 111 and housing portion 112 are integrated. The back cover portion 113 is fixed to the housing portion 112 by multiple (seven in this case) screws 114.

A transformer 42, a capacitor 43, and multiple (three in this example) fuses 44 are mounted on the front surface of the circuit board 4. Furthermore, the fuses 44 are held by fuse clips 45 so that the fuses 44 can be attached and detached from the circuit board 4 from the front surface side of the body 11 (flat portion 111). A spare fuse 46 is also held on the front surface side of the body 11 (flat portion 111) (i.e., within the space surrounded by the body 11 and cover 12).

The starting unit 2 and the indicator light 3 are attached to the cover 12 of the housing 1. The starting unit 2 and the indicator light 3 are disposed at the lower end of the housing 1. The starting unit 2 is attached to the cover 12, which is the front wall of the housing 1, from the rear side. Here, the starting unit 2 is attached to the cover 12 such that a part of the indicator light 3 is sandwiched between the starting unit 2 and the cover 12. In other words, the indicator light 3 is attached to the front wall (cover 12) of the housing 1 by being sandwiched between the starting unit 2 and the cover 12, which is the front wall of the housing 1.

The lower end of the cover 12 is formed with a circular through hole 121. When attached to the cover 12, at least a portion of the starting unit 2 and the indicator light 3 is exposed through this through hole 121 to the front surface of the cover 12 (front surface 101 of the housing 1). At least the operating surface 211 of the push button 21 of the starting unit 2 is exposed to the front surface 101 through the through hole 121. At least the light-emitting portion 311 of the indicator light 3 is exposed to the front surface 101 through the through hole 121. Therefore, the starting unit 2 and the indicator light 3 are not completely contained within the housing 1, but are held in the housing 1 with at least a portion exposed to the outside of the housing 1.

Although details will be described later, in this embodiment, the light-emitting portion 311 of the indicator light 3 is flush with at least the periphery of the light-emitting portion 311 on the front surface 101 of the housing 1. Furthermore, the light-emitting portion 311 of the indicator light 3 is flush with the operation surface 211 of the push button 21. Therefore, the light-emitting portion 311 of the indicator light 3 and the operation surface 211 of the push button 21 are both flush with at least the periphery of the light-emitting portion 311 on the front surface 101 of the housing 1. In addition, since the wire passage opening 115 is opened at the bottom end of the body 11, at least the starting unit 2 is also exposed from the rear surface of the housing 1 through the wire passage opening 115.

As described above, the mounting box 6 is formed in a box shape with an open front. The housing 1 (body 11 and cover 12) is assembled to the mounting box 6 so that the housing 1 covers this open surface (the front surface of the mounting box 6). In practice, the body 11 of the housing 1 is attached to the mounting box 6, and then the cover 12 is attached to the body 11, thereby assembling the housing 1 to the mounting box 6. A packing 61 is attached to the upper end 64 of the mounting box 6 to fill the gap with the housing 1. Wire passage holes 65 for passing wires are formed in the rear wall and bottom wall of the mounting box 6.

The housing 1 (body 11 and cover 12) and the mounting box 6 are made of resin, such as polycarbonate (PC) resin, ASA (Acrylonitrile Styrene Acrylate) resin, PC/ABS (Acrylonitrile Butadiene Styrene) alloy resin, or ABS resin.

Figures 4A to 4C are schematic diagrams showing an alarm device 10X as a comparative example and an alarm device 10 according to this embodiment installed on a wall W1. Figure 4A shows an alarm device 10X as a comparative example, Figure 4B shows an alarm device 10 according to this embodiment installed in an exposed state, and Figure 4C shows an alarm device 10 according to this embodiment installed in a recessed state.

Here, as a comparative example, as shown in FIG. 4A, an alarm device 10X is assumed to have a housing 1X including a body 11X and a cover 12X, and an indicator light 3X. Furthermore, here, the alarm device 10X of the comparative example is assumed to be installed exposed using a mounting box 6X. The indicator light 3X in the comparative example has a dome-shaped light body cover with translucency, and adopts a configuration in which the light body cover is directly illuminated by light from a light source arranged behind the light body cover. In this case, the surface of the light body cover is likely to have uneven brightness. Moreover, in such a configuration, the indicator light 3X protrudes significantly from the front surface 101X of the housing 1X. Therefore, the protrusion amount (height) L2 of the indicator light 3X from the wall W1 is even greater than the protrusion amount (height) L1 of the front surface 101X of the housing 1X from the wall W1 (L2>L1). As a result, in the alarm device 10X according to the comparative example, the protrusion amount (height) from the wall W1 to which it is attached is relatively large. In particular, if the alarm device 10X is installed in a relatively narrow space such as an aisle (including a corridor), the alarm device 10X will protrude into this space (passageway, etc.), and will likely become a nuisance to people passing through this space (passageway, etc.).

In contrast, in the alarm device 10 according to this embodiment, even if the device is installed in the same exposed position, the light emitting portion 311 of the indicator light 3 is flush with at least the periphery of the light emitting portion 311 on the front surface 101 of the housing 1, so that the indicator light 3 does not protrude as shown in FIG. 4B. In other words, in the alarm device 10 according to this embodiment, even when the device is attached to the wall W1 to which the device is to be attached using the mounting box 6, the projection (height) L3 of the indicator light 3 from the wall W1 is kept relatively small. However, in order to fit the indicator light 3 within the projection amount L3 of the front surface 101 of the housing 1 from the wall W1, it is generally considered that the dimension of the housing 1 in the front-rear direction would be large. In the alarm device 10 according to this embodiment, the dimension of the housing 1 in the front-rear direction is also kept small by the low-profile design described later. As a result, in the alarm device 10 according to this embodiment, the projection amount L3 of the front surface 101 of the housing 1 from the wall W1 can be made smaller than the projection amount L1 of the front surface 101X of the housing 1X from the wall W1 in the comparative example.

In addition, when the alarm device 10 according to this embodiment is installed in a recessed manner, it is possible to further reduce the protrusion (height) L4 of the front surface 101 of the housing 1 from the wall W1, as shown in FIG. 4C. In other words, in the recessed installation, a construction hole W11 is opened in the wall W1 to which the alarm device 10 is to be installed, and the rear part of the housing 1 is inserted into the construction hole W11, so that the alarm device 10 is installed with a part (rear part) of the housing 1 embedded in the wall W1. Strictly speaking, the alarm device 10 is attached to the wall W1 by inserting the housing part 112 of the body 11 into the construction hole W11 with the rear surface of the flat part 111 of the body 11 and the rear surface of the cover 12 in contact with the wall W1. In other words, the rear surface of the flat part 111 and the rear surface of the cover 12 are in contact with the periphery of the construction hole W11 in the wall W1. When used outdoors, it is preferable to apply a waterproof seal to this part, that is, between the rear surface of the flat part 111 and the rear surface of the cover 12 and the wall W1. In this type of recessed installation, the alarm device 10 is mounted using a switch box B1 placed inside (behind) the wall W1, as shown in FIG. 4C. In other words, the housing 1 is fixed to the wall W1, which is the mounting target, by being attached to the switch box B1 instead of the mounting box 6.

(2.3) Configuration of the Starting Unit Next, the configuration of the starting unit 2 will be described with reference to FIGS.

As shown in FIG. 5, in addition to the push button 21 and the movable element 22, the starting unit 2 has a recovery button 23, a base member 24, a pair of movable plates 25, a pair of springs 26, and a lid 27. The lid 27 is fixed to the base member 24 by multiple (here, four) screws 28.

The base member 24 is fixed to the housing 1. The base member 24 includes a circular annular plate 241. Here, the base member 24 is fixed to the cover 12 of the housing 1 so that the annular plate 241 is exposed on the front surface 101 side of the housing 1. In other words, the part of the base member 24 that is exposed on the front surface 101 side of the housing 1 when fixed to the housing 1 constitutes the annular plate 241. The base member 24 includes a protruding portion 243 that protrudes outward from the annular plate 241, and the protruding portion 243 is fixed to the cover 12 of the housing 1 with multiple (four here) screws 29 (see FIG. 8).

A round hole 244 is formed in the center of the base member 24, on the inside of the annular plate 241, to expose the operating surface 211 of the push button 21. Furthermore, above the round hole 244 in the annular plate 241, a hole 246 is formed to expose the recovery button 23.

The base member 24 has a storage chamber 245 on its rear side. The storage chamber 245 of the base member 24 contains the push button 21, the movable member 22, the recovery button 23, a pair of movable plates 25, and a pair of springs 26. The lid 27 is fixed to the base member 24 so as to close the rear side of the storage chamber 245.

The base member 24, like the housing 1, is made of resin such as polycarbonate resin, ASA resin, PC/ABS alloy resin, or ABS resin.

The movable element 22 is linked to the push button 21. In other words, when the push button 21 is operated so as to press the operation surface 211, the movable element 22 moves from the first position to the second position. The movable element 22 has a pair of shaft pieces 221. The pair of shaft pieces 221 are provided at both ends of the movable element 22 in the left-right direction (X-axis direction). The pair of shaft pieces 221 are supported by the lid 27, so that the movable element 22 is held by the lid 27 in a state in which it can rotate around the pair of shaft pieces 221. Specifically, the movable element 22 moves between the first position and the second position by rotating around a rotation axis Ax1 (see FIG. 6) that passes through the pair of shaft pieces 221.

In this embodiment, when the push button 21 is in a normal position described below, the movable element 22 is in a first position, and when the push button 21 is in an operating position described below, the movable element 22 is in a second position. In other words, as the push button 21 moves from the normal position to the operating position, the movable element 22 moves from the first position to the second position.

In the start-up unit 2, the movement of the mover 22 from the first position to the second position is taken as an output. In other words, the start-up unit 2 does not include electronic circuits or the like inside, and is a unit that produces a mechanical output in the form of the movement of the mover 22. Such output of the start-up unit 2, that is, the movement of the mover 22 from the first position to the second position, serves as a trigger for the circuit board 4, described below, to output an alarm signal. In other words, the circuit board 4 outputs an alarm signal when triggered by the output of the start-up unit 2 (the movement of the mover 22 from the first position to the second position).

Specifically, the movable member 22 drives the contact portion 47 provided on the circuit board 4. As shown in FIG. 7, the contact portion 47 has a fixed contact 471, a movable contact 472, and a pusher 473. The fixed contact 471 is fixed to the board body 41 of the circuit board 4. The movable contact 472 can move between a separated position away from the fixed contact 471 and a contact position in contact with the fixed contact 471. In this embodiment, as an example, the movable contact 472 is a spring contact that is normally located in the separated position. In this embodiment, as an example, the contact portion 47 has a pair of fixed contacts 471 and a pair of movable contacts 472. The pusher 473 is fixed across the pair of movable contacts 472. In other words, the contact portion 47 is a normally open (normally off) type contact, and is turned on when an external force is applied to the pusher 473 and the pair of movable contacts 472 move to the contact position against the elastic force. When the movable element 22 moves from the first position to the second position, it pushes the pusher 473, thereby changing the contact portion 47 from OFF to ON.

The pair of movable plates 25 are arranged on both sides of the push button 21 in the vertical direction (Z-axis direction). Each movable plate 25 has a tongue piece 251, an outer end 252, a pair of shaft pieces 254, and a pair of hook pieces 255. The tongue piece 251 is provided at the end of each movable plate 25 on the push button 21 side in the vertical direction (Z-axis direction). The outer end 252 is provided at the end of each movable plate 25 on the opposite side to the push button 21 in the vertical direction (Z-axis direction). The pair of shaft pieces 254 are provided at both ends of each movable plate 25 in the left-right direction (X-axis direction). The pair of hook pieces 255 are provided on both sides of the outer end 252 of each movable plate 25 in the left-right direction (X-axis direction). Each movable plate 25 is held by the lid 27 in a state in which the pair of shaft pieces 254 are supported by the lid 27 and can rotate around the pair of shaft pieces 254. In addition, a connection hole 253 for connecting to the recovery button 23 is formed near the outer end 252 of each movable plate 25.

The pair of springs 26 are arranged on both sides of the push button 21 in the left-right direction (X-axis direction). Each spring 26 is a tension spring, and both ends in the longitudinal direction (up-down direction) are hooked to the hook pieces 255 of the pair of movable plates 25. In other words, one end in the longitudinal direction of each spring 26 is hooked to the hook piece 255 of one movable plate 25, and the other end in the longitudinal direction of each spring 26 is hooked to the hook piece 255 of the other movable plate 25. As a result, the pair of springs 26 generate an elastic force in a direction that brings the hook pieces 255 of the pair of movable plates 25 across which the pair of springs 26 are spanned closer to each other.

The recovery button 23 is a member for returning the movable element 22 from the second position to the first position. The recovery button 23 is coupled to one of the pair of movable plates 25 (the upper one in this embodiment) by being inserted into a coupling hole 253 of this movable plate 25. When the push button 21 is in the operating position, the recovery button 23 is pressed backward (in the positive direction of the Y axis), whereby the push button 21 in the operating position is restored (moved) to the normal position. In other words, the operating state of the push button 21 (the state in the operating position) is released by operating the recovery button 23.

The push button 21 has an operation surface 211 arranged on the front surface 101 of the housing 1. The push button 21 is assembled to the base member 24 so as to be arranged in the round hole 244 on the inner side of the annular plate 241. The push button 21 is operated by pressing the operation surface 211 relatively strongly backward (in the positive direction of the Y axis). The operation surface 211 of the push button 21 is arranged at the center of the front surface of the annular plate 241. In this embodiment, the operation surface 211 of the push button 21 is a circle whose diameter is smaller than the inner circumference of the annular plate 241. Furthermore, in this embodiment, the center point of the operation surface 211 of the push button 21 coincides with the center point of the annular plate 241 when viewed from the front. In other words, the operation surface 211 of the push button 21 is concentric with the annular plate 241.

The push button 21 is configured to be movable between a normal position and an operating position. When the push button 21 is in the normal position, as shown in FIG. 6, the operating surface 211 of the push button 21 is approximately flush with the front surface of the annular plate 241. When the push button 21 is in the normal position, the operating surface 211 is pushed backward, causing the push button 21 to move to the operating position. When the push button 21 is in the operating position, as shown by the imaginary line (two-dot chain line) in FIG. 6, the operating surface 211 of the push button 21 is recessed backward from the front surface of the annular plate 241. The push button 21 is a self-retaining button, and once it is moved to the operating position, it does not automatically return to the normal position, but returns to the normal position when the recovery button 23 is operated.

More specifically, the push button 21 has a disk portion 212 on which an operating surface 211 is formed, and a protruding portion 213 that protrudes rearward from the rear surface of the disk portion 212. A hook recess 214 is formed on both end surfaces in the vertical direction (Z-axis direction) of the protruding portion 213. Tongue pieces 251 of a pair of movable plates 25 are inserted into the pair of hook recesses 214, so that the tongue pieces 251 hook into the hook recesses 214. Therefore, the pair of movable plates 25 are driven as the push button 21 moves between the normal position and the operating position.

The operation of the start-up unit 2 when the push button 21 is pressed and the operation of the start-up unit 2 when the push button 21 is released will be described with reference to Figures 6 and 7.

When the operation surface 211 of the push button 21 in the normal position is pressed, the push button 21 moves backward (positive direction of the Y axis) as shown by the arrow A1, and the pair of movable plates 25 rotate accordingly. At this time, the pair of movable plates 25 rotate in the direction of the arrow A2 so that each tongue 251 moves backward (positive direction of the Y axis) and each outer end 252 moves forward (negative direction of the Y axis). Moreover, when the pair of movable plates 25 rotate, the pair of springs 26 stretch the most when the pair of movable plates 25 assumes a posture perpendicular to the front-to-rear direction, so that the pair of movable plates 25 are pulled by the pair of springs 26 and the direction of rotation is reversed before and after this point. Then, due to the reversal of the force acting from the pair of springs 26, the pair of movable plates 25 rotate continuously in the direction of the arrow A2. Therefore, the push button 21 moves to the operation position in conjunction with the pair of movable plates 25, and the movable element 22 pressed by the outer end 252 rotates. At this time, the movable element 22 rotates in the direction of arrow A3 around the rotation axis Ax1 so that its upper end moves backward (in the positive direction of the Y axis). In other words, the movable element 22 moves from the first position to the second position. As a result, the pusher 473 of the contact portion 47 is pushed by the upper end of the movable element 22, and the movable contact 472 comes into contact with the fixed contact 471. As a result, the contact portion 47 is turned on.

On the other hand, when the push button 21 is in the operating position, the recovery button 23 protrudes forward (in the negative direction of the Y axis) from the front surface of the annular plate 241. When the recovery button 23 is pressed in this state, the recovery button moves backward (in the positive direction of the Y axis), and the pair of movable plates 25 rotate accordingly. At this time, the pair of movable plates 25 rotate in the direction opposite to that of arrow A2, so that each tongue 251 moves forward (in the negative direction of the Y axis) and each outer end 252 moves backward (in the positive direction of the Y axis). Then, due to the reversal of the force acting from the pair of springs 26 to the pair of movable plates 25, the push button 21 moves to the normal position in conjunction with the pair of movable plates 25, and the outer end 252 moves away from the movable element 22. At this time, the movable element 22 is pushed back by the elastic force of the movable contact 472, and rotates in the direction opposite to the arrow A3, centered on the rotation axis Ax1, so that its upper end moves forward (in the negative direction of the Y axis). In other words, the movable element 22 moves from the second position to the first position. As a result, the force applied from the movable element 22 to the pusher 473 of the contact portion 47 is released, and the movable contact 472 moves away from the fixed contact 471. As a result, the contact portion 47 turns off.

The starting unit 2 configured in this manner is attached to the front wall (cover 12) of the housing 1 from the rear side, as shown in FIG. 8. That is, the starting unit 2 is attached to the front wall of the housing 1 so that at least a portion faces the rear surface of the front wall (cover 12) of the housing 1. At this time, the starting unit 2 is fixed to the cover 12 with a plurality of screws 29, with at least the overhanging portion 243 of the base member 24 facing the periphery of the through hole 121 on the rear surface of the cover 12. Here, the base member 24 (overhanging portion 243) is attached to the cover 12 so that a portion of the indicator light 3 is sandwiched between the base member 24 and the cover 12, as described above.

As a result, when the activation unit 2 and the indicator light 3 are attached to the cover 12, at least a portion of them is exposed to the front surface of the cover 12 (front surface 101 of the housing 1) through the through hole 121. At least the push button 21 (operation surface 211) and the annular plate 241 of the activation unit 2 are exposed to the front surface 101 through the through hole 121.

(2.4) Configuration of Indicator Light Next, the configuration of the indicator light 3 will be described with reference to FIG. 6 and FIG. 8 to FIG.

As shown in FIG. 6, the indicator lamp 3 further includes a light source unit 32 and a light guide member 33 in addition to the light emitting unit 311. The light source unit 32 is accommodated in the housing 1. The light guide member 33 guides the light from the light source unit 32 to the light emitting unit 311, causing the light emitting unit 311 to emit light.

In this embodiment, the indicator light 3 has a lamp cover 31 that includes a light-emitting portion 311. In other words, the light-emitting portion 311 is part of the lamp cover 31. In this embodiment, the indicator light 3 further includes an intermediate member 34 and a diffusion member 35.

The lamp cover 31 is formed in a circular ring shape when viewed from the front. Here, the lamp cover 31 is fixed to the cover 12 of the housing 1 so that the light-emitting portion 311 is exposed on the front surface 101 side of the housing 1. In other words, the portion of the lamp cover 31 that is exposed on the front surface 101 side of the housing 1 when fixed to the housing 1 constitutes the light-emitting portion 311. The lamp cover 31 includes a peripheral portion 312 that protrudes outward from the light-emitting portion 311, and the peripheral portion 312 is fixed to the cover 12 of the housing 1 together with the starting unit 2.

That is, in this embodiment, as described above, the base member 24 (projection portion 243) of the starting unit 2 is attached to the cover 12 so as to sandwich a part (peripheral portion 312) of the indicator light 3 between the cover 12 and the base member 24 (projection portion 243) (see FIG. 8). Therefore, the lamp cover 31 of the indicator light 3 is fixed to the housing 1 together with the starting unit 2 in a state where it is sandwiched between the base member 24 of the starting unit 2 and the cover 12. Then, with the lamp cover 31 fixed to the housing 1, at least the light-emitting portion 311 is exposed to the front surface 101 side through the through hole 121. In this way, the indicator light 3 has the lamp cover 31 including the light-emitting portion 311. Then, the starting unit 2 is attached to the front wall of the housing 1 with the lamp cover 31 sandwiched between the front wall of the housing 1 (cover 12) and the front wall of the housing 1.

At least the portion of the lamp cover 31 that functions as the light-emitting section 311 is translucent, and light from the light-guiding member 33 is output forward (in the negative direction of the Y-axis) through the light-emitting section 311. This causes the light-emitting section 311 to emit light, and a person looking at the indicator light 3 from the front sees a circular ring-shaped light. In this embodiment, as an example, the lamp cover 31 is translucent and made of a resin such as red-colored PC resin, ASA resin, PC/ABS alloy resin, or ABS resin.

A through hole 313 is formed in the center of the lamp cover 31, inside the light-emitting part 311, to expose the activation unit 2 (push button 21 and annular plate 241). As a result, when the indicator light 3 is combined with the activation unit 2, the operating surface 211 of the push button 21 and the annular plate 241 are exposed on the front side of the lamp cover 31 through the through hole 313.

Here, when the indicator light 3 is fixed to the housing 1 (cover 12) together with the starting unit 2, the light-emitting portion 311 of the indicator light 3 is flush with at least the periphery of the light-emitting portion 311 on the front surface 101 of the housing 1 (cover 12). In other words, the front surface of the light-emitting portion 311 exposed on the front surface 101 side of the cover 12 through the through-hole 121 is flush with the peripheral portion of the through-hole 121 on the front surface 101. In this embodiment, since the front surface 101 of the housing 1 is a plane (flat surface), substantially the entire front surface 101 of the housing 1 is flush with the light-emitting portion 311 of the indicator light 3.

Furthermore, the light-emitting portion 311 of the indicator light 3 is also flush with the operation surface 211 of the push button 21. In other words, at least the operation surface 211 of the operation surface 211 of the push button 21 and the annular plate 241 exposed on the front side of the light body cover 31 through the through hole 313 is flush with the front surface of the light-emitting portion 311 of the indicator light 3. In addition, in this embodiment, the annular plate 241 located between the light-emitting portion 311 and the operation surface 211 in a front view is also flush with the light-emitting portion 311. In other words, the annular plate 241 exposed on the front side of the light body cover 31 through the through hole 313 is also flush with the front surface of the light-emitting portion 311 of the indicator light 3.

Therefore, in this embodiment, the light emitting unit 311, the annular plate 241, and the operation surface 211 exposed to the front surface 101 side of the cover 12 through the through hole 121 are flush (approximately on the same plane). Furthermore, since the light emitting unit 311 and the front surface 101 of the housing 1 are flush, as a result, the front surface 101 of the housing 1, the light emitting unit 311, the annular plate 241, and the operation surface 211 are all flush. According to this shape, since there is no protrusion from the front surface 101 of the housing 1, in the alarm device 10 according to this embodiment, the protrusion amount (height) L3, L4 from the wall W1 to which it is attached can be kept relatively small (see Figures 4B and 4C). Moreover, since no recess is formed in the front surface 101 of the housing 1, the internal space of the housing 1 can be effectively used to accommodate the starting unit 2 and the indicator light 3, etc., and the dimensions of the housing 1 itself can be kept relatively small. Furthermore, since there are no recesses on the front surface 101 of the housing 1, dirt is less likely to accumulate on the front surface 101 of the housing 1, which reduces the maintenance work required for the alarm device 10.

As described above, the light-emitting unit 311 is disposed on the front surface 101 of the housing 1. The light-emitting unit 311 is annular in shape surrounding the operation surface 211 in a front view. In this disclosure, "annular" may refer to any shape that generally surrounds the operation surface 211 of the push button 21, and is not limited to a closed loop shape that continues over the entire circumferential length of the operation surface 211, and may be, for example, a shape with a portion of the circumference open. Furthermore, "annular" is not limited to a circular shape (annular ring), and may be, for example, an elliptical shape, a polygonal shape, etc.

In this embodiment, the light-emitting portion 311 is formed in a circular ring shape with a larger diameter than the annular plate 241. In other words, the annular plate 241 and the push button 21 (operation surface 211) of the starting unit 2 are located inside the light-emitting portion 311 when viewed from the front. In this way, when the indicator light 3 is combined with the starting unit 2, the starting unit 2 is located in the area surrounded by the light-emitting portion 311 of the indicator light 3 when viewed from the front. Therefore, the position of the starting unit 2 is clearly indicated when the indicator light 3 is turned on and the light-emitting portion 311 emits light.

In particular, in this embodiment, the operation surface 211 is located at the center of the area surrounded by the light-emitting unit 311. That is, in this embodiment, the operation surface 211 of the push button 21 is located at the center of the front surface of the annular plate 241. Moreover, the operation surface 211 of the push button 21 is circular with a diameter smaller than the inner circumference of the annular plate 241. The annular light-emitting unit 311 is located around the annular plate 241. Here, the operation surface 211 is concentric with the light-emitting unit 311. In short, in this embodiment, the center point of the operation surface 211 of the push button 21 and the center point of the annular light-emitting unit 311 coincide with each other in a front view. Therefore, the operation surface 211 of the push button 21, the annular plate 241, and the light-emitting unit 311 are concentric.

Furthermore, as described above, a hole 246 for exposing the recovery button 23 is formed in the annular plate 241 located between the light-emitting unit 311 and the operation surface 211 in a front view. Therefore, the recovery button 23 is disposed between the light-emitting unit 311 and the operation surface 211 in a front view. Therefore, the recovery button 23, together with the operation surface 211 of the push button 21, is surrounded by the annular light-emitting unit 311.

A groove 314 is formed on the rear side of the lamp cover 31 in a circular shape when viewed from behind. The groove 314 houses the light guide member 33. The light guide member 33 is formed in a circular shape along the outer periphery of the front surface of the lamp cover 31 so as to emit light over almost the entire area of the light emitting portion 311. The light guide member 33 outputs light forward (in the negative direction of the Y axis), and as described above, the light from the light guide member 33 is output forward through the light emitting portion 311 of the lamp cover 31.

Here, the light guide member 33 is fixed to the cover 12 of the housing 1 so as to be sandwiched between the lamp cover 31 and the starting unit 2 while being accommodated in the groove portion 314. That is, in this embodiment, the indicator lamp 3 has the lamp cover 31. The lamp cover 31 includes a light emitting portion 311. The starting unit 2 holds the light guide member 33 by sandwiching it between the lamp cover 31 and the starting unit 2. In this embodiment, as described above, the starting unit 2 is attached to the front wall of the housing 1 so that at least a part of it (the overhanging portion 243 of the base member 24) faces the rear surface of the front wall (cover 12) of the housing 1. Therefore, as shown in FIG. 8, the starting unit 2 is fixed to the cover 12 together with the lamp cover 31 so as to sandwich the lamp cover 31 between at least the overhanging portion 243 of the base member 24 and the periphery of the through hole 121 on the rear surface of the cover 12. At this time, the light guide member 33 is held in place by sandwiching it between the protruding portion 243 of the base member 24 and the lamp cover 31.

As shown in FIG. 10, the light source unit 32 has multiple (four in this example) light-emitting elements 321. These four light-emitting elements 321 are arranged in a matrix when viewed from the front, with two in each of the vertical direction (Z-axis direction) and two in each of the horizontal direction (X-axis direction). FIG. 10 is a diagram showing the relative positional relationship between the light source unit 32, the intermediate member 34, and the light-guiding member 33. In FIG. 10, the lamp cover 31 including the light-emitting unit 311 is shown by an imaginary line (two-dot chain line).

In this embodiment, as an example, each of the multiple light-emitting elements 321 is a surface-mounted chip LED (Light Emitting Diode) that outputs red light. As shown in FIG. 6, the multiple light-emitting elements 321 are arranged (mounted) on the front surface of the board body 41 of the circuit board 4. Therefore, when power is supplied to the light source unit 32 through the wiring conductor on the board body 41, the multiple light-emitting elements 321 emit light and output red light.

The intermediate member 34 is a member for guiding the light from the light source unit 32 provided on the circuit board 4 to the light guide member 33. The intermediate member 34 is, for example, a molded product made of transparent resin such as acrylic resin, and takes in the output light from the light source unit 32 and guides it through the inside of the intermediate member 34 to the light guide member 33, i.e., it is a member that guides the light.

In this embodiment, the intermediate member 34 and the light guide member 33 are separate. In other words, the intermediate member 34 and the light guide member 33 are physically separated. In this embodiment, the light guide member 33 is fixed to the cover 12 of the housing 1 together with the lamp cover 31, and the intermediate member 34 is fixed, for example, to the body 11 of the housing 1. As a result, it is only when the body 11 and the cover 12 are combined that the intermediate member 34 is positioned opposite the light guide member 33 (the entrance portion 331 described later), and the intermediate member 34 is able to guide the light from the light source portion 32 to the light guide member 33.

As shown in FIG. 10, the intermediate member 34 has a first light guide section 341 and a second light guide section 342. The first light guide section 341 guides the light from the light source section 32 along an axis (Y axis) perpendicular to the front surface 101 of the housing 1. The second light guide section 342 guides the light output from the first light guide section 341 along the front surface 101 of the housing 1. That is, the intermediate member 34 is formed in a substantially L-shape as a whole with the first light guide section 341 and the second light guide section 342. As a result, the intermediate member 34 can guide the light from the light source section 32 forward (negative direction of the Y axis) and further downward (negative direction of the Z axis).

The intermediate member 34 also has a reflecting surface 343 at the joint between the first light guiding section 341 and the second light guiding section 342. The reflecting surface 343 reflects the light incident from the first light guiding section 341 toward the second light guiding section 342. The reflecting surface 343 is an inclined surface that is inclined at an angle of approximately 45 degrees with respect to the horizontal plane so that the reflecting surface 343 is positioned lower (in the negative direction of the Z axis) as it approaches the front end. Therefore, the light passing through the interior of the intermediate member 34 is reflected downward by the reflecting surface 343 at the joint between the first light guiding section 341 and the second light guiding section 342. This makes it possible to efficiently guide the light passing through the intermediate member 34.

The diffusion member 35 is disposed between the front surface of the light guide member 33 and the lamp cover 31. The diffusion member 35 has light diffusion properties and light transmission properties (light transparency). The diffusion member 35 is, for example, a molded product of a light-transmitting PC resin or the like containing a light-transmitting diffusion member, and is formed in a circular ring shape covering the front surface of the light guide member 33. As a result, the light output forward from the front surface of the light guide member 33 passes through the diffusion member 35 while being diffused, and is output forward from at least a part of the front surface of the lamp cover 31 by passing through the lamp cover 31. At this time, when viewed from the front, the part of the front surface of the lamp cover 31 that overlaps with the diffusion member 35 in the front-rear direction appears to be lit, and this part functions as the light-emitting part 311. In other words, at least a part of the lamp cover 31 that houses the light guide member 33 has light transmission properties and constitutes the light-emitting part 311.

The configuration of the light-guiding member 33 is described in more detail below.

As described above, the light-guiding member 33 is stored in the space between the lamp cover 31 and the base member 24 (extension 243) of the starting unit 2. Here, the lamp cover 31, which covers the front surface of the light-guiding member 33, is a translucent resin molded product colored red. On the other hand, the base member 24 (extension 243), which covers the rear surface of the light-guiding member 33, is an opaque resin molded product colored red.

The light guide member 33 is, for example, a molded product made of a transparent resin such as acrylic resin, and is a member that takes in the output light of the light source unit 32 and guides it to the light emitting unit 311 through the inside of the light guide member 33, that is, guides the light. The light guide member 33 is located behind the light emitting unit 311 and is formed in a ring shape that overlaps with the light emitting unit 311 in the front-to-rear direction. In this embodiment, the light emitting unit 311 is a ring-shaped area formed on the inner periphery of the front surface of the lamp cover 31, so the light guide member 33 is formed in the same ring shape as the light emitting unit 311.

The light guide member 33 takes in the output light of the light source unit 32 from one location in the circumferential direction of the light emitting unit 311 (the lower end in this embodiment), guides the light in the circumferential direction of the light guide member 33, and outputs it from the front surface of the light guide member 33.

9, the light guide member 33 has an entrance portion 331, a cylindrical tube portion 332, and an exit portion 333. The entrance portion 331 is a portion for taking in light from the light source portion 32 into the tube portion 332, and is provided at the upper end of the tube portion 332. That is, the light guide member 33 has the entrance portion 331, into which light from the light source portion 32 is incident, at one location (lower end) in the circumferential direction of the light emitting portion 311. The exit portion 333 is a portion for taking out light from the tube portion 332, and is provided in front of the tube portion 332. In this embodiment, the exit portion 333 is an annular member in a front view and is made of a plate-like member with a thickness direction in the front-rear direction. The tube portion 332 is formed integrally with the exit portion 333 in a form that protrudes rearward from the rear surface of the exit portion 333.

The incident portion 331 protrudes from a portion of the outer circumferential surface of the cylindrical portion 332. In this embodiment, the incident portion 331 protrudes upward (in the positive direction of the Z axis) from a position that is the upper end of the outer circumferential surface of the cylindrical portion 332. The second light guiding portion 342 of the intermediate member 34 is disposed to face the tip surface (upper surface) of the incident portion 331. The intermediate member 34 is disposed above the incident portion 331 with the output light oriented toward the incident portion 331. As a result, the light output from the light source portion 32 passes through the intermediate member 34 and enters the incident portion 331.

As described above, in this embodiment, the light guide member 33 has an incident portion 331. The incident portion 331 is a portion of the light guide member 33 where light from the light source portion 32 is incident. The light source portion 32 is provided on the circuit board 4. The intermediate member 34 guides the light from the light source portion 32 to the incident portion 331. Therefore, even if the circuit board 4 on which the light source portion 32 is provided and the light guide member 33 are separated from each other, the intermediate member 34 is interposed between them, so that the light from the light source portion 32 is incident on the light guide member 33 through the intermediate member 34. In this way, the intermediate member 34 forms an optical path from the light source portion 32 to the light guide member 33.

Here, the light guide member 33 is configured to guide the light from the light source unit 32 around both circumferential sides of the light guide member 33 in a front view. In this embodiment, as described above, the entrance portion 331 for taking the light from the light source unit 32 into the cylindrical body portion 332 is provided at the upper end of the cylindrical body portion 332. Therefore, the light introduced from the entrance portion 331 into the cylindrical body portion 332 is divided into light (a bundle of rays) that travels along a clockwise optical path inside the cylindrical body portion 332 in a rear view and light (a bundle of rays) that travels along a counterclockwise optical path, and reaches the lower end of the cylindrical body portion 332. In reality, the light that passes through each optical path travels inside the cylindrical body portion 332 while repeatedly being reflected on the inner and outer circumferential surfaces of the cylindrical body portion 332.

The light guide member 33 further includes an optical mirror 334 (see FIG. 9) that converts the light incident on the light guide member 33 from the light source unit 32 into light directed along the circumferential direction of the light guide member 33. In this embodiment, as described above, the light guide member 33 is provided with a pair of optical mirrors 334 in order to divide the light introduced from the incident portion 331 into the cylindrical portion 332 into two optical paths and guide the light. The pair of optical mirrors 334 are provided at a position that is the back surface of the incident portion 331 on the outer peripheral surface of the cylindrical portion 332, and are composed of a pair of planes that are approximately V-shaped and open downward when viewed from the front. The surface of each of the pair of optical mirrors 334 is mirror-finished and is inclined at an angle of approximately 45 degrees with respect to the tip surface (upper surface) of the incident portion 331, and the pair of optical mirrors 334 intersect with each other at an angle of approximately 90 degrees. As a result, the light incident on the entrance 331 from the light source 32 is reflected by one of the pair of optical mirrors 334 in a direction along the circumferential direction of the light guide member 33 (to the right or left) and is distributed to one of the two optical paths.

Here, the rear surface of the light-guiding member 33 (the rear surface of the tubular portion 332) is inclined with respect to the front surface of the light-guiding member 33 so that the thickness of the light-guiding member 33 in the front-to-rear direction decreases the further away from the light source portion 32 (light-emitting element 321). Therefore, the dimension of the tubular portion 332 in the light-guiding member 33 in the front-to-rear direction is not constant, and the dimension of the tubular portion 332 in the front-to-rear direction decreases the further away from the entrance portion 331, that is, the closer to the lower end of the tubular portion 332.

Furthermore, the light guide member 33 has a plurality of light guide grooves 335 formed on the rear surface of the light guide member 33 (the rear surface of the cylindrical body portion 332). The plurality of light guide grooves 335 are grooves formed so as to extend radially from the center point of the cylindrical body portion 332 in a front view, and each bottom surface is mirror-finished. These plurality of light guide grooves 335 are formed so as to be lined up at approximately equal intervals on both sides of the circumference of the cylindrical body portion 332 when viewed from the entrance portion 331. Each of the plurality of light guide grooves 335 has an inner surface farther from the entrance portion 331 formed in a sawtooth shape that is approximately perpendicular to the circumference of the cylindrical body portion 332. Furthermore, the plurality of light guide grooves 335 are not of the same shape, and are configured so that the light guide grooves 335 become deeper as they move away from the entrance portion 331.

With the above-described configuration, the light guide member 33 can efficiently reflect light incident on the rear surface of the cylindrical portion 332 forward at the bottom surface of the light guide groove 335, improving the efficiency of light extraction from the exit portion 333 at the front of the cylindrical portion 332. Furthermore, since the light guide groove 335 becomes deeper the farther away from the entrance portion 331, it is possible to minimize variations in brightness due to differences in distance from the entrance portion 331.

In this embodiment, a diffusion member 35 having light diffusion properties and light transmission properties is provided between the front surface of the light guide member 33 and the lamp cover 31 (light emitting portion 311). Therefore, the light guide member 33 adopts the following configuration so that light is incident as uniformly as possible on the entire area of the rear surface of the diffusion member 35.

That is, as shown in FIG. 10, the emission section 333 of the light guide member 33 is set to have a larger dimension in the radial direction (hereinafter also referred to as the "width direction") of the cylindrical section 332 than the cylindrical section 332. Furthermore, a groove 336 with a V-shaped cross section is formed on the front surface of the emission section 333 around the entire circumference of the emission section 333 in the circumferential direction. The bottom surface of the groove 336 is mirror-finished. This makes it possible for the emission section 333 to spread the light incident from the cylindrical section 332 in the width direction.

In other words, light entering the exit portion 333 from the cylindrical portion 332 is reflected toward both sides in the width direction by the bottom surface of the groove 336, and is further reflected toward the front by both end surfaces in the width direction of the exit portion 333. As a result, light is extracted from almost the entire width direction of the exit portion 333, and light is incident as evenly as possible on the entire rear surface of the diffusion member 35. Since the light incident on the diffusion member 35 is diffused as it passes through the diffusion member 35, the front surface of the diffusion member 35 emits light almost evenly over the entire area. In other words, the front surface of the diffusion member 35 emits light from a surface.

According to the above configuration, while the annular light-emitting unit 311 is illuminated when viewed from the front, the output light of the light source unit 32 does not directly enter the light-emitting unit 311, but enters the light-emitting unit 311 via the light-guiding member 33. This makes it possible to achieve a relatively uniform light-emitting state in the circumferential direction of the light-emitting unit 311. Moreover, the annular light-emitting unit 311 set in front of the diffusion member 35 emits light, and a person looking at the indicator light 3 from the front sees an annular light. In this case, the front surface of the diffusion member 35 located behind (behind) the light-emitting unit 311, which has translucency, actually emits light, so when the indicator light 3 is viewed from the front, the inside of the lamp cover 31 appears to be shining, and the light appears to have depth.

(2.5) Structure of the Inner Unit Next, the structure of the inner unit 100 will be described with reference to FIGS.

The internal unit 100 in this disclosure includes the body 11 of the housing 1 and the components housed in the body 11 (such as the circuit board 4 and the speaker 5). In other words, the internal unit 100 is combined with the cover 12 together with the starting unit 2 and the indicator light 3.

As shown in FIG. 11, the internal unit 100 has a body 11, a circuit board 4, a speaker 5, a storage battery 7 (see FIG. 13A), and a test operation unit 8.

As described above, the body 11 has a flat plate portion 111, a housing portion 112, and a back cover portion 113. The circuit board 4, the speaker 5, and the like are housed in the space surrounded by the flat plate portion 111, the housing portion 112, and the back cover portion 113. The housing portion 112 is cylindrical with at least an opening on the rear side, and is integrated with the flat plate portion 111. The back cover portion 113 is fixed to the housing portion 112 by multiple (seven in this case) screws 114.

The circuit board 4 has a board body 41 made of a printed wiring board, and various electronic components mounted on the board body 41. As shown in Figures 12A and 12B, the various electronic components mounted on the board body 41 include a transformer 42, a capacitor 43, and multiple (three in this case) fuses 44, as well as a contact portion 47, a terminal portion 48, and a connector 49. Furthermore, a switch 82 is mounted on the board body 41. The switch 82, together with an operator 81 (see Figure 11), constitutes the test operation unit 8.

The terminal portion 48 includes a plurality of terminals 481 (six in this example). Each of the plurality of terminals 481 is a screw terminal. The terminal portion 48 is disposed at the lower end of the front surface of the board body 41. The plurality of terminals 481 are disposed in a row along the lower edge of the front surface of the board body 41. Here, in the flat plate portion 111 of the body 11, a "recess" recessed toward the rear is formed directly above the wire passage opening 115. In the bottom surface of this recess, a plurality of terminal holes 119 (six in this example) are formed that penetrate the body 11 (flat plate portion 111) in the front-rear direction. Then, when the circuit board 4 is assembled to the body 11, the plurality of terminals 481 are exposed to the front side of the body 11 through the plurality of terminal holes 119, respectively. With this configuration, when the circuit board 4 is assembled to the body 11, the terminal portion 48 is exposed at a position facing the wire passage opening 115 on the front surface of the body 11. Therefore, wiring that is pulled into the front side of the body 11 through the wire port 115 can be connected to the terminal portion 48.

The connector 49 is a connector for electrically connecting the storage battery 7. The connector 49 is disposed at the upper end of the front surface of the substrate body 41. A round hole 411 is formed below the connector 49 in the substrate body 41.

The speaker 5 is housed in a speaker arrangement section 116 on the rear surface of the body 11. The speaker arrangement section 116 is disposed in the housing section 112. A hole penetrating the body 11 (flat plate section 111) in the front-rear direction is formed in the bottom surface of the speaker arrangement section 116. The speaker 5 is fixed to the body 11 with a number of screws (two in this case) 53, with a baffle ring 51 sandwiched between the speaker 5 and the bottom surface of the speaker arrangement section 116. The front surface of the speaker 5 is preferably covered with a waterproof sheet. In this case, the waterproof sheet is fixed by being sandwiched between the baffle ring 51 and the body 11, for example.

The rear of the speaker 5 is inserted into the round hole 411 of the board body 41. As a result, when the speaker 5 and the circuit board 4 are housed in the housing portion 112, the rear of the speaker 5 protrudes from the rear surface of the circuit board 4 through the round hole 411. The rear surface of the speaker 5 is pressed against the back cover portion 113 via the baffle plate 52.

A sound output hole 122 (see FIG. 8) is formed in the cover 12 at a position facing the speaker 5. A first sheet 124 with many tiny holes formed therein is attached to the front surface 101 of the cover 12 so as to cover the sound output hole 122 (see FIG. 8). As a result, the sound output from the speaker 5 is output to the outside of the housing 1 from near the first sheet 124 on the front surface 101 of the housing 1.

The test operation unit 8 has an operator 81 and a switch 82. The operator 81 penetrates the body 11 and protrudes to the front side of the body 11. A square hole 123 (see FIG. 8) is formed in the cover 12 at a position facing the operator 81. A second sheet 125 is attached to the front surface 101 of the cover 12 so as to cover the square hole 123 (see FIG. 8). This makes it possible to operate the operator 81 from outside the housing 1 through the second sheet 125 on the front surface 101 of the housing 1. When the operator 81 is pressed, the switch 82 is indirectly operated.

In addition, an operation hole 117 that penetrates the body 11 in the front-rear direction is formed in the body 11 (flat plate portion 111) at a position corresponding to the contact portion 47. The pusher 473 of the contact portion 47 is inserted into the operation hole 117. This makes it possible to operate the contact portion 47 (movable contact 472) on the circuit board 4 from the front side of the body 11.

The contact section 47 is turned on when an external force is applied to the pusher 473 and the pair of movable contacts 472 move to a contact position against the elastic force. When the contact section 47 is turned on, the circuit board 4 outputs an alarm signal. Here, an external force is applied to the pusher 473 as the movable member 22 of the activation unit 2 moves from the first position to the second position. Therefore, the movement of the movable member 22 from the first position to the second position triggers the output of the alarm signal. The speaker 5 receives the alarm signal and outputs an alarm sound.

As shown in FIG. 13A, a battery accommodating section 118 is formed at the upper end of the front surface of the body 11. The battery accommodating section 118 is a recess recessed toward the rear, and accommodates the storage battery 7. When the cover 12 is attached to the body 11, the front of the battery accommodating section 118 is covered by the cover 12. Therefore, the storage battery 7 in the battery accommodating section 118 is accommodated in the housing 1, sandwiched between the body 11 and the cover 12. The connector 49 on the circuit board 4 is exposed below the battery accommodating section 118. Therefore, the cable connecting the storage battery 7 in the battery accommodating section 118 and the connector 49 can be made relatively short.

As shown in Figs. 13A to 13C, in addition to the wire passage opening 115, the inner unit 100 has a plurality of (four in this case) mounting holes 141 and a plurality of (four in this case) fixing holes 142 formed as holes penetrating the body 11 in the front-rear direction (Y-axis direction). Furthermore, the inner unit 100 has a plurality of (two in this case) hook holes 143 formed as holes penetrating the body 11 in the front-rear direction (Y-axis direction). The plurality of mounting holes 141 are holes used to attach the body 11 (housing 1) to the mounting box 6 in exposed installation. The plurality of mounting holes 141 are holes used to attach the body 11 (housing 1) to the switch box B1 (see Fig. 4C) in recessed installation. The plurality of hook holes 143 are holes used to temporarily hold the body 11 (housing 1) to the mounting box 6 in exposed installation. The mounting holes 141, the fixing holes 142, and the hook holes 143 are formed in the flat plate portion 111 at a portion that protrudes outward from the housing portion 112, specifically, at both ends in the left-right direction (X-axis direction) of the flat plate portion 111. Furthermore, the inner unit 100 has multiple (four in this example) holding portions 16 at both ends in the left-right direction (X-axis direction) of the flat plate portion 111 for mechanically connecting the cover 12 and the body 11.

In addition, an insert nut 132 is disposed in the center of the lower end (below the wire passage opening 115) on the front surface of the body 11. A screw 131 is tightened through the cover 12 into the insert nut 132, thereby fixing the cover 12 to the body 11.

As will be explained in more detail in the section "(2.7) Waterproof structure", the body 11 is formed with a first overhanging portion 151 and a second overhanging portion 152 as a waterproof structure for preventing liquid from adhering to the circuit board 4, etc. The first overhanging portion 151 and the second overhanging portion 152 are formed on the front surface of the body 11.

14 is a schematic diagram showing the positional relationship of the components of the internal unit 100. In FIG. 14, the flat plate portion 111 and the storage portion 112 of the body 11 are omitted, and only the circuit board 4, the speaker 5, the storage battery 7, and the back cover portion 113 are shown. As is clear from FIG. 14, the storage battery 7 is located above the circuit board 4 (positive direction of the Z axis). That is, the storage battery 7 and the circuit board 4 stored in the housing 1 are arranged side by side in one direction (here, the up-down direction) along the front surface 101 of the housing 1. That is, in this embodiment, as described above, the storage battery 7 is stored in the battery storage portion 118, which is a recess formed at the upper end of the front surface of the body 11, so that the storage battery 7 is located above the circuit board 4 stored in the storage portion 112.

In this way, by arranging the storage battery 7 and the circuit board 4 side by side in one direction along the front surface 101 of the housing 1, the height of the housing 1 can be made lower than when the storage battery 7 and the circuit board 4 overlap in the front-to-rear direction (Y-axis direction). In other words, the storage battery 7 is particularly tall (has a large dimension in the front-to-rear direction) among the components of the internal unit 100, and by arranging the circuit board 4 within the height of the storage battery 7, the front-to-rear dimension of the housing 1 that houses the storage battery 7 and the circuit board 4 can be kept relatively small. As a result, the housing 1 can be made lower in height than when the storage battery 7 and the circuit board 4 are arranged side by side in the front-to-rear direction, and the above-mentioned "ideas for making the housing 1 lower in height" are realized.

The speaker 5 is also arranged in a position overlapping a portion of the circuit board 4 in the front-to-rear direction (Y-axis direction). That is, as described above, the speaker 5 is assembled to the circuit board 4 from the front (negative direction of the Y-axis) by inserting its rear portion into the round hole 411 (see FIG. 12B) of the board body 41. In particular, the speaker 5 is arranged to overlap the upper half of the circuit board 4 (above the center in the up-down direction) when viewed from the front. With this arrangement, the storage battery 7 is located above the speaker 5. That is, since the storage battery 7 is located above the circuit board 4 as described above, the storage battery 7 is located above the speaker 5 even when looking at the relative positional relationship between the speaker 5 overlapping a portion of the circuit board 4 in the front-to-rear direction.

The terminal portion 48 is disposed at the lower end of the front surface of the board body 41 so that the terminal portion 48 is exposed at a position facing the wire passage opening 115 on the front surface of the body 11. In other words, the circuit board 4 has a terminal portion 48 for connecting wiring at the lower end of the circuit board 4. With the terminal portion 48 disposed in this manner, it is possible to connect the wiring drawn from below the terminal portion 48 to the front surface side of the body 11 through the wire passage opening 115 to the terminal portion 48. This makes it easier to prevent liquid (water, etc.) from reaching the terminal portion 48 via the wiring.

(2.6) How to Assemble the Alarm Device Next, a method of assembling the alarm device 10 will be described with reference to Figures 15 to 21B. Here, it is assumed that the alarm device 10 is installed exposed using the mounting box 6.

The alarm device 10 is broadly divided into three blocks: a cover 12 to which the activation unit 2 and the indicator light 3 are attached, an internal unit 100, and a mounting box 6. When installing the alarm device 10, these three blocks (the cover 12, the internal unit 100, and the mounting box 6) are combined as shown in Figure 15.

In other words, the inner unit 100 is assembled to the mounting box 6 so as to cover the front of the mounting box 6. Specifically, the inner unit 100 is mechanically coupled to the mounting box 6 so as to cover the opening surface (front surface) of the mounting box 6 with the flat plate portion 111 of the body 11. At this time, a part of the inner unit 100 (the storage portion 112 and the back cover portion 113, etc.) is contained within the mounting box 6.

Then, the cover 12 with the starting unit 2 and indicator lamp 3 attached is assembled to the inner unit 100 so as to cover the front of the body 11. This mechanically connects the cover 12 to the body 11, forming the housing 1 consisting of the body 11 and the cover 12. At this time, at least the starting unit 2 is exposed from the rear surface of the housing 1 (inside the mounting box 6) through the wire passage opening 115 formed at the lower end of the body 11 (below the terminal portion 48).

As shown in FIG. 15, the rear surface of the starting unit 2 does not contact the internal unit 100, and a gap G1 is maintained between the starting unit 2 and the internal unit 100. Therefore, the cover 12 together with the starting unit 2 is not pushed forward by the internal unit 100 hitting the rear surface of the starting unit 2, and distortion or floating of the cover 12 due to the mounting tolerance of the starting unit 2 can be suppressed.

The connection structure between the inner unit 100 and the mounting box 6 is described in more detail below with reference to Figures 16 to 18B.

That is, as shown in FIG. 16, the mounting box 6 is formed in a box shape with an open front. When viewed from the front, the mounting box 6 is longer in the vertical direction (Z-axis direction) than in the left-right direction (X-axis direction), that is, it is formed in a vertically elongated rectangular shape. The mounting box 6 has a plurality of (four here) fixing bosses 62 and a plurality of (two here) temporary holding parts 63. The plurality of fixing bosses 62 are used to fix the inner unit 100 to the mounting box 6. The plurality of fixing bosses 62 protrude forward from the four corners of the front surface of the rear wall of the mounting box 6. The plurality of temporary holding parts 63 are used to temporarily hold the inner unit 100 to the mounting box 6. The plurality of temporary holding parts 63 protrude forward from the center of the vertical direction (Z-axis direction) of both ends in the left-right direction (X-axis direction) on the front surface of the rear wall of the mounting box 6. That is, one of the two temporary holding parts 63 is located between two fixed bosses 62 provided at the right end of the front surface of the rear wall of the mounting box 6, and the other temporary holding part 63 is located between two fixed bosses 62 provided at the right end of the front surface of the rear wall of the mounting box 6.

When the inner unit 100 is assembled to the mounting box 6, as shown in FIG. 17, the inner unit 100 overlaps with almost the entire mounting box 6 in a front view. Here, the multiple fixing bosses 62 are arranged in positions that correspond one-to-one with the multiple mounting holes 141 formed in the body 11. Also, the multiple temporary holding parts 63 are arranged in positions that correspond one-to-one with the multiple hanging holes 143 formed in the body 11. Therefore, by inserting each temporary holding part 63 of the mounting box 6 into each hanging hole 143 of the body 11, the inner unit 100 (body 11) is temporarily held by the mounting box 6. Furthermore, in the state shown in FIG. 17, if screws are tightened into each fixing boss 62 of the mounting box 6 through each mounting hole 141 of the body 11, the inner unit 100 (body 11) is fixed to the mounting box 6.

18A, the temporary holding portion 63 has a first piece 631 extending forward (negative direction of the Y axis) from the rear wall of the mounting box 6, and a second piece 632 extending upward (positive direction of the Z axis) from the tip of the first piece 631. In other words, the temporary holding portion 63 is formed in a generally L-shape in side view by the first piece 631 and the second piece 632. When the inner device 100 is combined with the mounting box 6, such a temporary holding portion 63 is inserted into the hook hole 143 of the body 11. At this time, the second piece 632 of the temporary holding portion 63 is hooked on the opening periphery of the hook hole 143 in the body 11, preventing the body 11 from falling off the mounting box 6. In this way, the temporary holding portion 63 temporarily holds the housing 1 (body 11) by hooking onto it, thereby temporarily holding the inner unit 100.

However, the temporary holding portion 63 does not permanently fix the inner unit 100 to the mounting box 6, but only temporarily holds it. In this disclosure, "permanently fixed" refers to a state in which the inner unit 100 is completely fixed so that it does not move relative to the mounting box 6. In this disclosure, "temporarily held" refers to a state in which the inner unit 100 is held by the mounting box 6 but can move relative to the mounting box 6. In short, the temporary holding portion 63 is only hooked onto the housing 1 (body 11), and the inner unit 100 (body 11) can move at least upward (in the positive direction of the Z axis) relative to the mounting box 6 even when temporarily held by the temporary holding portion 63.

As shown in FIG. 18B, the fixing boss 62 has a screw hole 621 and a dowel 622 located below the screw hole 621. When the internal unit 100 is assembled to the mounting box 6, the screw hole 621 of the fixing boss 62 is located behind the mounting hole 141 of the body 11. In this embodiment, the mounting hole 141 is a "dart hole" in which a large diameter hole and a small diameter hole smaller than the large diameter hole are integrally formed. Therefore, by passing the head of a screw through the large diameter hole of the mounting hole 141, the internal unit 100 can be attached and detached to the mounting box 6 even if the screw is inserted halfway into the screw hole 621.

Furthermore, as shown in FIG. 18B, the dowels 622 of the fixing bosses 62 are inserted into the mounting holes 141 to restrict left-right (X-axis) movement of the inner unit 100 relative to the mounting box 6. By providing such fixing bosses 62 at the four corners of the mounting box 6, tilt (rotation) of the inner unit 100 relative to the mounting box 6 is suppressed when viewed from the front.

With this configuration, when a worker installing the alarm device 10 attaches the internal unit 100 to the mounting box 6, the worker can first hook the temporary holding portion 63 onto the housing 1 (body 11) to temporarily hold the internal unit 100 on the mounting box 6. Then, with the internal unit 100 temporarily held, the worker can tighten a screw through the mounting hole 141 of the body 11 and into the fixing boss 62 of the mounting box 6 to fix (mainly fix) the internal unit 100 (body 11) to the mounting box 6. Therefore, the worker does not need to support the internal unit 100 with his or her hand when tightening the screw, improving workability.

In addition, since the temporary holding portion 63 is located in the center of the mounting box 6 in the vertical direction (Z-axis direction), it has the function of preventing the inner unit 100 from floating up relative to the mounting box 6 by hooking onto the inner unit 100 (body 11). In other words, even when the body 11 is fully fixed to the mounting box 6, the temporary holding portion 63 remains hooked onto the body 11. Therefore, even if distortion occurs in the body 11 or the mounting box 6, for example, the temporary holding portion 63 hooks onto the body 11 near the vertical center of the mounting box 6, preventing the body 11 from floating up from the mounting box 6. As a result, it is possible to prevent an unnecessary gap from occurring between the mounting box 6 and the inner unit 100 (body 11).

The connection structure between the inner container 100 and the cover 12 will be described in more detail below with reference to Figures 19 and 20.

That is, as shown in FIG. 19, the cover 12 is formed as a thin box with an open rear surface. When viewed from the front, the cover 12 is longer in the vertical direction (Z-axis direction) than in the horizontal direction (X-axis direction), that is, it is formed as a vertically long rectangle. The cover 12 has a rib 18 that protrudes downward from the lower surface of its upper wall. The rib 18 extends in the horizontal direction and is formed on the lower surface of the upper wall of the cover 12 except for both ends in the horizontal direction. This rib 18 forms a recess 181 (see FIG. 23B) that is open downward on the lower surface of the upper wall of the cover 12. Details will be explained in the "(2.7) Waterproof structure" section, but the recess 181 consists of the area sandwiched between the rib 18 that protrudes downward from the rear end of the upper wall of the cover 12 and the front wall of the cover 12.

In addition, the cover 12 has multiple (four in this example) protrusions 126 that protrude inward from the inner circumferential surfaces of the right and left side walls. The multiple protrusions 126 are structures for mechanically connecting the cover 12 and the body 11.

When the cover 12 is assembled to the inner unit 100, the upper end 17 of the body 11 is inserted into the recess 181 as shown in FIG. 19. In other words, the cover 12 has a recess 181 that is open downward, and the cover 12 is attached to the body 11 with the upper end 17 of the body 11 inserted into the recess 181. As a result, when the cover 12 is assembled to the inner unit 100, the rib 18 of the cover 12 is caught on the upper end 17 of the body 11, preventing the cover 12 from falling off from the inner unit 100 (body 11). Furthermore, in this state, if the screw 131 is tightened into the insert nut 132 of the body 11 from the front side of the cover 12, the cover 12 is fixed to the inner unit 100 (body 11).

When the cover 12 is attached to the inner container 100, as shown in FIG. 19, the inner container 100 overlaps with substantially the entire cover 12 in rear view. Here, the multiple protrusions 126 are arranged in positions that correspond one-to-one with the multiple holding portions 16 formed on the body 11. Therefore, the protrusions 126 of the cover 12 hook onto the holding portions 16 of the body 11, mechanically connecting the cover 12 to the body 11. In other words, the holding portions 16 mechanically connect the body 11 and the cover 12 by a snap-fit method.

20, the holding portion 16 has a beam portion 161 and a protrusion 162 protruding outward from the beam portion 161. The beam portion 161 has elasticity. When the cover 12 is fitted to the body 11, the holding portion 16 uses the elasticity of the beam portion 161 to cause the protrusion 162 to climb over the protrusion 126 and hook onto it. This allows the holding portion 16 to mechanically connect the body 11 and the cover 12. In this embodiment, two holding portions 16 are provided on each of the left and right sides of the flat plate portion 111. Therefore, when the cover 12 is attached to the body 11, the holding portions 16 are covered by the cover 12 and cannot be seen from the front.

The holding portion 16 adjusts the strength of the connection between the body 11 and the cover 12 by adjusting the shape of the protruding piece 162, for example, the inclination angle. In this embodiment, the strength of the connection between the body 11 and the cover 12 by the holding portion 16 is set to be relatively small. Therefore, the cover 12 is connected to the body 11 in a detachable state.

In addition, since the retaining portion 16 is located near the center of the body 11 in the vertical direction (Z-axis direction), it has the function of preventing the cover 12 from floating up relative to the inner unit 100 by hooking onto the cover 12. Therefore, even if distortion occurs in the body 11 or the cover 12, for example, the retaining portion 16 hooks onto the cover 12 near the center of the cover 12 in the vertical direction, thereby preventing the cover 12 from floating up from the body 11. As a result, it is possible to prevent an unnecessary gap from occurring between the cover 12 and the inner unit 100 (body 11).

According to the configuration described above, both ends of the cover 12 in the longitudinal direction (vertical direction) in front view are fixed to the body 11 by a connecting structure. At least a portion between both ends of the cover 12 in the longitudinal direction (vertical direction) in front view is held to the body 11 by being fitted with the body 11. In this embodiment, the connecting structure is realized by a structure in which the upper end 17 of the body 11 is inserted into the recess 181, the screw 131, and the insert nut 132. In addition, the structure for holding the cover 12 to the body 11 by being fitted with the body 11 is realized by a retaining portion 16 of a snap fit type.

As described above, in this embodiment, the light-emitting unit 311, the annular plate 241, and the operation surface 211 are flush (approximately on the same plane). Furthermore, the light-emitting unit 311 and the front surface 101 of the housing 1 are also flush. The configuration for making the front surface 101 of the housing 1, the light-emitting unit 311, the annular plate 241, and the operation surface 211 flush will be described with reference to Figures 21A and 21B. Figures 21A and 21B are cross-sectional views corresponding to the cutaway surface of Figure 15, and only the cover 12, the lamp cover 31, the base member 24, and the push button 21 are illustrated, and the illustration of the other members is omitted. Also, Figure 21A is a cross-sectional view of the disassembled state of the cover 12, the lamp cover 31, the base member 24, and the push button 21, and Figure 21B is a cross-sectional view of the assembled state of the cover 12, the lamp cover 31, the base member 24, and the push button 21.

That is, in this embodiment, as shown in Fig. 21A, the following dimensional relationship is adopted for the four members of the cover 12, the lamp cover 31, the base member 24, and the push button 21. First, if the thickness dimension around the through hole 121 in the front wall of the cover 12 is "D1" and the height from the front of the peripheral portion 312 in the lamp cover 31 to the front of the light-emitting portion 311 is "D2", then the dimensional relationship of "D1 = D2" is established. Also, if the front-to-rear dimension of the inner peripheral surface of the through hole 313 in the lamp cover 31 is "D3" and the height from the front of the protruding portion 243 in the base member 24 to the front of the annular plate 241 is "D4", then the dimensional relationship of "D3 = D4" is established. Furthermore, if the dimension of the inner peripheral surface of the round hole 244 in the base member 24 in the front-to-rear direction is "D5" and the height of the step around the operating surface 211 of the push button 21 is "D6", then the dimensional relationship "D5 = D6" is established.

Due to the above dimensional relationship, when the cover 12, the lamp cover 31, the base member 24 and the push button 21 are combined (assembled state), as shown in FIG. 21B, the front surface 101 of the housing 1, the light emitting portion 311, the annular plate 241 and the operation surface 211 are flush with each other. In other words, according to the dimensional relationship of "D1 = D2", the front surface of the light emitting portion 311 exposed on the front surface 101 side of the cover 12 through the through hole 121 is flush with the peripheral portion of the through hole 121 on the front surface 101. Furthermore, according to the dimensional relationship of "D3 = D4", the front surface of the annular plate 241 exposed on the front surface side of the lamp cover 31 through the through hole 313 is flush with the front surface of the light emitting portion 311 of the indicator lamp 3. And according to the dimensional relationship of "D5 = D6", the operation surface 211 of the push button 21 exposed on the front surface side of the base member 24 through the round hole 244 is flush with the front surface of the annular plate 241 on the base member 24.

(2.7) Waterproof Structure Next, the waterproof structure of the alarm device 10 will be described with reference to Figs. 22A to 24B.

As explained in the section "(2.5) Configuration of the internal unit", components such as the circuit board 4 and speaker 5 are basically housed in the space surrounded by the flat plate portion 111, the housing portion 112, and the back cover portion 113. However, the circuit board 4 and the like are not arranged in a completely sealed space, and for example, at least the terminal portion 48 (multiple terminals 481) and the connector 49 of the circuit board 4 are exposed on the front side of the body 11. Furthermore, the rear surface of the housing portion 112 is not sealed by the back cover portion 113, and there is a small gap between the rear surface of the housing portion 112 and the back cover portion 113.

When the alarm device 10 is installed and used outdoors, liquid (water, etc.) may adhere to the surface of the inner unit 100. Therefore, a waterproof structure is applied to the inner unit 100 to prevent liquid from adhering to the circuit board 4, etc. by preventing liquid from entering a specific area. Specifically, as shown in Figures 22A and 22B, a first waterproof area WP1 and a second waterproof area WP2 are set in the inner unit 100 (body 11) to prevent liquid from entering. The first waterproof area WP1 is an area in which liquid entry should be prevented, and the second waterproof area WP2 is an area in which liquid entry should be more reliably prevented. In other words, the second waterproof area WP2 is required to have a higher waterproof performance than the first waterproof area WP1. The shaded areas in Figures 22A and 22B are areas that diagrammatically show the first waterproof area WP1 and the second waterproof area WP2, respectively.

The first waterproof area WP1 is formed on both ends of the front surface of the body 11 in the left-right direction (X-axis direction). In the first waterproof area WP1, a waterproof structure is applied to prevent liquid adhering to the front surface of the body 11 from passing through the above-mentioned mounting hole 141 and fixing hole 142 and flowing around to the back side of the body 11. Specifically, the first eaves portion 151 is formed on the front surface of the body 11 as described above. The first eaves portion 151 is located above the mounting hole 141 and fixing hole 142, and has the function of making it difficult for liquid running down the front surface of the body 11 to penetrate the mounting hole 141 and fixing hole 142. As a result, the first waterproof area WP1 including the mounting hole 141 and fixing hole 142 is formed below the first eaves portion 151 on the front surface of the body 11.

The second waterproof area WP2 is formed in the center of the front surface of the body 11 in the left-right direction (X-axis direction). A waterproof structure is applied to the second waterproof area WP2 to prevent liquid adhering to the front surface of the body 11 from adhering to the circuit board 4. In other words, the second waterproof area WP2 is an area including the circuit board 4. Specifically, the second overhanging portion 152 is formed on the front surface of the body 11 as described above. The second overhanging portion 152 is located above the storage portion 112 and has the function of making it difficult for liquid running down the front surface of the body 11 to penetrate into the storage portion 112. Therefore, the second waterproof area WP2 including the storage portion 112 is formed in the center of the front surface of the body 11 in the left-right direction.

23A and 23B, a structure for preventing liquid from entering through the seam between the body 11 and the cover 12 is also adopted in this embodiment. Specifically, the cover 12 is attached to the body 11 with the upper end 17 of the body 11 inserted into the recess 181 of the cover 12, thereby preventing liquid from entering the housing 1 through the seam between the body 11 and the cover 12. In other words, the rib 18 protruding downward from the rear end of the upper wall of the cover 12 is combined so as to cover the upper end 17 of the body 11, so that the seam between the body 11 and the cover 12 is covered by the rib 18 in the rear view. In this way, the rib 18 (recess 181) has a function of preventing the cover 12 from falling off the body 11, as well as a function of preventing liquid from entering through the seam between the body 11 and the cover 12. In this embodiment, as shown in FIG. 23A, the rib 18 is formed only in the range R10 of the lower surface of the upper wall of the cover 12, excluding both ends in the left and right directions. As a result, a second waterproof area WP2 that is difficult for liquid to penetrate is formed at least in the center in the left-right direction of the front surface of the body 11.

With the configuration described above, the housing 1 has flow paths R1 formed on both sides of the circuit board 4 in the left-right direction (X-axis direction) when viewed from the front. Furthermore, the housing 1 has eaves (first eaves 151 and second eaves 152) that are arranged at least above the circuit board 4 and direct liquid that has entered the housing 1 to the flow path R1. In other words, liquid that has entered the housing 1 flows through the flow paths R1 on both sides of the circuit board 4 in the left-right direction so as to avoid at least the second waterproof area WP2 when viewed from the front. The flow paths R1 through which liquid that has entered the housing 1 flows are formed on both sides of the second waterproof area WP2, avoiding the first waterproof area WP1, as shown in FIG. 22A.

The second waterproof area WP2 is also formed on the inside (interior) of the storage section 112, as shown in FIG. 22B. Since liquid may adhere to the rear surface of the housing 1, the waterproofing of the inside of the storage section 112 is achieved as follows.

That is, as shown in FIG. 24A, the storage section 112 protrudes from the rear surface of the flat plate section 111 of the body 11. The upper surface 153 of the storage section 112 is sloped so that the center in the left-right direction (X-axis direction) is highest and becomes lower toward both ends in the left-right direction. Furthermore, a flange section 154 that protrudes upward from the upper surface 153 is formed at the rear end of the storage section 112. With this configuration, as shown in FIG. 24A, the liquid S1 that runs from the rib 18 of the cover 12 to the rear surface of the flat plate section 111 of the body 11 flows to both left-right sides of the storage section 112.

24B, a structure for preventing liquid from entering through the seam between the storage section 112 and the back cover section 113 is also adopted. FIG. 24B is a partially cutaway enlarged view showing area A1 in FIG. 24A. Specifically, the back cover section 113 is attached to the storage section 112 with the upper end 156 of the back cover section 113 inserted into the recess 157 opened downwardly of the storage section 112, thereby preventing liquid from entering the housing 1 through the seam between the storage section 112 and the back cover section 113. In other words, the rib 155 protruding downward from the lower rear edge of the rear surface of the storage section 112 is combined so as to cover the upper end 156 of the back cover section 113, so that the seam between the storage section 112 and the back cover section 113 is covered by the rib 155 in the rear view. In this way, the rib 155 (recess 157) has the function of preventing liquid from entering through the seam between the storage section 112 and the back cover section 113. With this configuration, as shown in FIG. 24B, liquid S1 adhering to the rear surface of the storage section 112 does not enter the housing 1 through the seam between the storage section 112 and the back cover section 113, but flows to the rear surface of the back cover section 113.

(3) Modifications The first embodiment is merely one of various embodiments of the present disclosure. All drawings referred to in the first embodiment are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios. Various modifications of the first embodiment can be made depending on the design, etc., as long as the object of the present disclosure can be achieved. The modifications described below can be applied in appropriate combination.

(3.1) First Modification As shown in FIG. 25A, an alarm device 10 according to a first modification of the first embodiment differs from the alarm device 10 according to the first embodiment in the shape and arrangement of a recovery button 23A on a start-up unit 2A.

That is, in this modified example, a circular area arranged on a part of the front surface 101 of the housing 1 is divided into two areas along one diameter of the circular area. These two areas become the operation surface 211A and the front surface of the recovery button 23A, respectively. That is, in the example of FIG. 25A, the circular area inside the annular plate 241 is divided into two in the vertical direction. Of the divided areas, the lower area becomes the operation surface 211A of the push button 21A, and the upper area becomes the front surface of the recovery button 23A. Here, the operation surface 211A occupies more than half the area of the circular area inside the annular plate 241. That is, the operation surface 211A has a larger area than the front surface of the recovery button 23A.

According to the configuration of this modified example, the push button 21A (operation surface 211A) and the recovery button 23A can be placed in the same circular area as the annular light emitting unit 311, making it possible to adopt a unified design based on a circle. Furthermore, since the recovery button 23A is positioned adjacent to the push button 21A, it is easy to operate the recovery button 23A when the push button 21A is in the operating position.

(3.2) Second Modification As shown in FIG. 25B, an alarm device 10 according to a second modification of the first embodiment differs from the alarm device 10 according to the first embodiment in the arrangement of the light-emitting portion 311 in the indicator lamp 3.

That is, in this modified example, the light-emitting unit 311 is disposed adjacent to the operation surface 211 of the push button 21 on the front surface 101 of the housing 1. In other words, the light-emitting unit 311 is disposed immediately outside the operation surface 211. The annular plate 241 is formed in a shape that surrounds the operation surface 211 and the light-emitting unit 311 when viewed from the front. That is, in this modified example, the light-emitting unit 311 is positioned around the operation surface 211 on the front surface 101 of the housing 1, and the annular plate 241 is positioned around the light-emitting unit 311.

In this way, the light-emitting unit 311 only needs to be annular and surround the operation surface 211 in a front view, and it is not essential for the alarm device 10 that the annular plate 241 be located between the light-emitting unit 311 and the operation surface 211 in a front view. Furthermore, in the example of FIG. 25B, it is not essential that the annular plate 241 be located around the light-emitting unit 311, and the annular plate 241 may be omitted as appropriate.

(3.3) Other Modifications Modifications other than the first and second modifications are listed below.

The alarm device 10 is not limited to being used outdoors, but may also be used indoors. When the alarm device 10 is installed indoors, it is not essential that the alarm device 10 be waterproof, and the waterproofing configuration may be omitted as appropriate. However, even when the alarm device 10 is installed indoors, the alarm device 10 may be waterproof.

In addition, it is not essential for the alarm device 10 that the intermediate member 34 and the light-guiding member 33 are separate bodies, and the intermediate member 34 may be integrated with the light-guiding member 33. For example, the intermediate member 34 and the light-guiding member 33 can be integrated by forming them from the same material. Alternatively, the intermediate member 34 and the light-guiding member 33 made of a foreign material can be integrated by two-color molding.

Furthermore, it is not an essential configuration of the alarm device 10 that the front surface 101 of the housing 1, the light-emitting unit 311, the annular plate 241, and the operation surface 211 are all flush. For example, the front surface 101 of the housing 1 and the light-emitting unit 311 may be flush, and the annular plate 241 and the operation surface 211 may be located in a protruding or recessed position relative to the light-emitting unit 311. Alternatively, for example, the light-emitting unit 311, the annular plate 241, and the operation surface 211 may be flush, and the light-emitting unit 311 may be located in a protruding or recessed position relative to the front surface 101 of the housing 1.

In addition, the annular plate 241 being located between the light-emitting unit 311 and the operation surface 211 in a front view is not a required configuration of the alarm device 10, and the annular plate 241 may be omitted as appropriate. In this case, for example, the front surface 101 of the housing 1, the light-emitting unit 311, and the operation surface 211 may all be flush with each other, excluding the annular plate 241.

In addition, each terminal 481 in the terminal section 48 is not limited to a screw terminal, but may be a plug-in terminal, for example, a so-called quick-connect terminal in which the wiring is connected simply by inserting the wiring.

In addition, the gap G1 does not have to be provided between the starting unit 2 and the internal unit 100, and the rear surface of the starting unit 2 may be in contact with the internal unit 100. In this case, the force applied to the starting unit 2 when the push button 21 of the starting unit 2 is pressed can be received by the internal unit 100.

(Embodiment 2)
As shown in Figures 26A and 26B, the alarm device 10A according to this embodiment differs from the alarm device 10 described in the first embodiment in the configuration of the indicator light 3A. Hereinafter, the same configuration as in the first embodiment will be denoted by the same reference numerals and the description will be omitted as appropriate. Figure 26B is a diagram showing the relative positional relationship between the light source unit 32 and the light guide member 33. In Figure 26B, the lamp cover 31 including the light emitting unit 311 is shown by an imaginary line (two-dot chain line).

In this embodiment, the intermediate member 34 (see FIG. 10) is omitted in the indicator lamp 3A. The light source unit 32 emits light directly to the incident portion 331 of the light-guiding member 33. In short, in this embodiment, the light-guiding member 33 has the incident portion 331 into which the light from the light source unit 32 is incident. The light source unit 32 is disposed in a position facing the incident portion 331, and outputs light toward the incident portion 331.

Specifically, in this embodiment, the multiple light-emitting elements 321 that make up the light source unit 32 are mounted on an LED board 36 as shown in FIG. 26A. The LED board 36 is a board separate from the circuit board 4, and is electrically connected to the circuit board 4 by an electric wire (cable). The LED board 36 is disposed above the light-guiding member 33, facing the tip surface (upper surface) of the incident portion 331. The LED board 36 is disposed with the mounting surface of the multiple light-emitting elements 321 facing downward (negative direction of the Z axis).

With this configuration, there is no loss in the intermediate member 34, and the light from the light source unit 32 can be efficiently incident on the light-guiding member 33.

As a modification of the second embodiment, even when multiple light-emitting elements 321 are mounted on the LED board 36, an intermediate member 34 may be interposed between the light source section 32 and the incident section 331.

The configuration (including modified examples) described in embodiment 2 can be adopted in appropriate combination with the various configurations (including modified examples) described in embodiment 1.

(Embodiment 3)
27 to 32B, the alarm device 10B according to this embodiment differs from the alarm device 10 according to embodiment 1 mainly in the configuration around the speaker 5. Hereinafter, the same components as those in embodiment 1 will be denoted by the same reference numerals and descriptions thereof will be omitted as appropriate.

Figure 27 is an exploded perspective view of the mounting box 6, body 11, and cover 12 in a separated state. As is clear from Figure 27, the alarm device 10B differs from the alarm device 10 of embodiment 1 in configurations other than those around the speaker 5, such as the orientation of the storage battery 7. In the example of Figure 27, a fixing screw 66 for fixing the body 11 is attached to the screw hole 621 of the fixing boss 62. Furthermore, in the example of Figure 27, a cap 67 is attached to the wire passage hole 65 formed in each of the upper and lower walls of the mounting box 6 to cover the wire passage hole 65.

The main differences between the alarm device 10B of this embodiment and the alarm device 10 of embodiment 1 are explained below item by item.

(1) Speaker Fixing Structure First, a structure for fixing the speaker 5 in the alarm device 10B according to this embodiment will be described.

In the alarm device 10B according to this embodiment, a thinner speaker 5 is used compared to the speaker 5 of the first embodiment. Specifically, the speaker 5 of this embodiment is formed in a disk shape having a thickness, and both sides in the thickness direction are approximately flat. That is, the speaker 5 of this embodiment does not have a large protrusion such as the rear part including the voice coil and magnet, that is, the part inserted into the round hole 411 of the circuit board 4, as in the speaker 5 shown in the first embodiment (see FIG. 11). Furthermore, the speaker 5 of this embodiment has a smaller dimension (area) in front view compared to the speaker 5 of the first embodiment. Here, the speaker 5 is approximately circular in front view, so the diameter of the speaker 5 of this embodiment is smaller than the diameter of the speaker 5 of the first embodiment. Such a thin speaker 5 is easier to reduce in size and weight compared to the speaker 5 of the first embodiment. Therefore, it is easier to reduce the space occupied by the speaker 5 in the internal space of the housing 1, and further to reduce the weight of the entire inner unit 100.

When adopting such a thin speaker 5 in the alarm device 10B, in this embodiment, the structure related to fixing the speaker 5, i.e., the fixing structure of the speaker 5, differs from that of the alarm device 10 in embodiment 1.

That is, in this embodiment, as shown in Figures 28 and 29, the speaker 5 is housed between the flat plate portion 111 of the body 11 and the board main body 41 of the circuit board 4. Specifically, as in the first embodiment, a speaker placement portion 116 is formed in the area surrounded by the placement portion 112 on the rear surface of the flat plate portion 111 of the body 11. The speaker placement portion 116 is a portion for placing the speaker 5.

In short, the housing 1 has a body 11 and a cover 12. The cover 12 is attached to the body 11 so as to cover the front surface of the body 11. The body 11 has a speaker arrangement section 116 for arranging the speaker 5 at a portion facing the front surface 401 (see FIG. 30A) of the circuit board 4. In this embodiment, the speaker arrangement section 116 is a circular recess corresponding to the shape of the speaker 5. Therefore, the speaker 5 is arranged in the speaker arrangement section 116 so as to be fitted into the circular recess as the speaker arrangement section 116 from the rear (circuit board 4 side). Here, the speaker 5 is arranged in the speaker arrangement section 116 with the front surface, which is the sound extraction surface, facing the bottom surface of the speaker arrangement section 116. A hole is formed on the bottom surface of the speaker placement section 116, penetrating the body 11 (flat plate section 111) in the front-to-rear direction, so the sound output from the speaker 5 passes through the hole on the bottom surface of the speaker placement section 116 and is output forward from the front surface of the body 11.

Here, as shown in FIG. 28 and FIG. 29, the speaker 5 is fitted into the speaker arrangement part 116 together with the baffle ring 51 as a baffle member. The baffle ring 51 is made of resin, for example. The baffle ring 51 is an annular shape having approximately the same diameter as the outer periphery of the front surface of the speaker 5. When the speaker 5 and the baffle ring 51 are arranged in the speaker arrangement part 116, the baffle ring 51 is interposed between the front surface of the speaker 5 and the bottom surface of the speaker arrangement part 116. In other words, the alarm device 10B according to this embodiment is provided with a baffle member (baffle ring 51), and the baffle member (baffle ring 51) is sandwiched between the outer periphery of the front surface of the speaker 5 and the speaker arrangement part 116. As a result, the gap between the outer periphery of the front surface of the speaker 5 and the speaker arrangement part 116 is filled with the baffle member (baffle ring 51), suppressing sound leakage from this gap. As a result, the sound output from the speaker 5 is output relatively efficiently forward from the front of the body 11 through the hole in the bottom surface of the speaker placement section 116.

In addition, in this embodiment, the speaker 5 is not fixed directly to the body 11 with a screw, but is fixed to the body 11 by being pressed against the speaker arrangement part 116 by the speaker pressing part 54. As shown in Figures 28 and 29, the speaker pressing part 54 includes a protrusion 541 that protrudes forward from a part of the back cover part 113 of the body 11. As an example, the protrusion 541 is integral with the back cover part 113 and is formed in a hollow columnar (cylindrical) shape. The back cover part 113 also has a flexure part 542 around the protrusion 541. As an example, the flexure part 542 is formed in an annular area around the protrusion 541 and is made of a thin part that is thinner than the other parts of the back cover part 113 around the flexure part 542, i.e., the periphery of the flexure part 542. Therefore, the flexible portion 542 is more flexible than other portions of the back cover 113 (portions other than the flexible portion 542).

The speaker pressing portion 54 penetrates the convex portion 541 from the rear side (back cover portion 113 side) of the circuit board 4 to the front side 401 side through the hole 412 formed in the circuit board 4. The hole 412 is formed in the board body 41 of the circuit board 4 instead of the round hole 411 (see FIG. 11) of the first embodiment. In other words, the speaker 5 itself is not inserted into the hole 412, but the convex portion 541 of the speaker pressing portion 54 is inserted, and the opening area of the hole 412 is kept smaller than the opening area of the round hole 411. The speaker pressing portion 54 presses the tip (front surface) of the convex portion 541 protruding from the front surface 401 of the circuit board 4 through the hole 412 against the rear surface of the speaker 5, thereby pressing the speaker 5 against the speaker arrangement portion 116 through the baffle ring 51. With the speaker 5 pressed against the speaker placement section 116 by the speaker pressing section 54 in this manner, the back cover section 113 is fixed to the housing section 112 by multiple (seven in this case) screws 114, thereby fixing the speaker 5 to the body 11.

That is, the alarm device 10B according to this embodiment is provided with a speaker pressing portion 54 that presses the speaker 5 from the circuit board 4 side against the speaker arrangement portion 116. This makes it difficult for sound to leak from the gap between the speaker arrangement portion 116 and the speaker 5, and makes it easier to efficiently extract the sound output from the speaker 5.

Here, the body 11 has a flat plate portion 111, a storage portion 112 protruding rearward from the rear surface of the flat plate portion 111, and a back cover portion 113 that covers the rear surface of the storage portion 112, as in the first embodiment. The circuit board 4, the speaker 5, and the like are stored in the space surrounded by the flat plate portion 111, the storage portion 112, and the back cover portion 113. In other words, the body 11 has the back cover portion 113 located opposite the speaker arrangement portion 116 as viewed from the speaker 5. The speaker pressing portion 54 includes a protrusion 541 that protrudes from a part of the back cover portion 113 toward the speaker arrangement portion 116. The speaker pressing portion 54 presses the speaker 5 against the speaker arrangement portion 116 at the tip of the protrusion 541. This makes it possible to press the speaker 5 against the speaker arrangement portion 116 by the speaker pressing portion 54 as the back cover portion 113 is assembled. Additionally, the circuit board 4 is located between the back cover 113 and the speaker 5. The protrusion 541 passes through a hole 412 formed in the circuit board 4. This makes it easier to ensure the height of the protrusion 541 while keeping the gap between the back cover 113 and the speaker placement section 116 relatively small, and makes it easier to press the speaker 5.

In addition, the back cover 113 has a flexible portion 542 around the protruding portion 541. The flexible portion 542 is more flexible than other portions of the back cover 113. Here, as shown in FIG. 30A, the amount of protrusion of the protruding portion 541 from the front surface of the back cover 113 is set to be greater than the distance from the front surface of the back cover 113 to the rear surface of the speaker 5. Therefore, dimensional variations in the body 11 or the speaker 5 due to tolerances, etc. can be absorbed by the flexible portion 542 being flexible. In particular, in this embodiment, the amount of protrusion of the protruding portion 541 from the front surface of the back cover 113 is set to be greater than the distance from the front surface of the back cover 113 to the rear surface of the speaker 5. Therefore, when the back cover 113 is fixed to the housing 112, pressure is always applied to the speaker 5 from the protrusion 541 of the speaker pressing part 54, making it less likely that a gap will form between the speaker placement part 116 and the speaker 5.

The sound output from the speaker 5 is output to the outside of the housing 1 through the sound output hole 122 (see FIG. 31) formed in the cover 12 as the front wall of the housing 1. In this embodiment, the speaker 5 is disposed in a position close to the sound output hole 122 in the internal space of the housing 1, so that the sound output from the speaker 5 can be efficiently output to the outside of the housing 1. Here, as shown in FIG. 30A, the speaker 5 is located between the center C10 in the front-rear direction of the housing 1 and the front surface 101 of the housing 1. In other words, when the housing 1 is divided in half at the center C10 in the front-rear direction, the speaker 5 is located between the center C10 and the front surface 101 of the housing 1. In other words, the speaker 5 is located in the internal space of the housing 1, in a position forward of the center C10 in the front-rear direction of the housing 1, that is, in the front half of the housing 1. In FIG. 30A, center C10 is the center position when housing 1 is divided into two equal parts in the front-rear direction, and distance L11 from front surface 101 of housing 1 to center C10 is equal to distance L12 from rear surface (rear surface of back cover portion 113) of housing 1 to center C10. Here, center C10 in the front-rear direction of housing 1 may be center C10 in the front-rear direction of the internal space of housing 1 (internal space of body 11). In particular, since a thin speaker 5 is used in this embodiment, it is possible to keep the front-rear dimension of housing 1 relatively small while still fitting speaker 5 in the front half of housing 1.

Furthermore, in this embodiment, the speaker 5 is located forward of the front surface 401 of the circuit board 4 in the front-rear direction. In other words, the speaker 5 is arranged at a position spaced from the front surface 401 of the circuit board 4 in the front-rear direction. In particular, in this embodiment, as described above, the convex portion 541 of the speaker pressing portion 54 protrudes forward from the front surface 401 of the circuit board 4 by penetrating the hole 412 formed in the circuit board 4. And, since the tip of this convex portion 541 contacts the speaker 5, the speaker 5 does not directly contact the circuit board 4, and a sufficient gap is secured between the speaker 5 and the front surface 401 of the circuit board 4, so that stress is unlikely to act from the speaker 5 to the circuit board 4. Therefore, there is an advantage that stress acting from the speaker 5 to the circuit board 4 is unlikely to cause stress on the board main body 41 or various electronic components mounted on the board main body 41.

Furthermore, in this embodiment, the speaker arrangement section 116 has a speaker stopper 55 as shown in FIG. 30A. The speaker stopper 55 is provided on the bottom surface of the speaker arrangement section 116 in which a hole is formed, and restricts at least forward movement of the speaker 5. That is, the speaker arrangement section 116 has the speaker stopper 55. The speaker stopper 55 restricts forward movement of the speaker 5 by exposing a part of the front surface of the speaker 5 forward and facing a part of the front surface of the speaker 5. In this embodiment, the speaker stopper 55 is formed integrally with the flat plate portion 111 of the body 11. The speaker stopper 55 is formed in a hole penetrating the flat plate portion 111 in the front-rear direction as shown in FIG. 28, and includes a lattice-shaped lattice portion 551 as an example here. Furthermore, as shown in FIG. 30A, the speaker stopper 55 faces the outer periphery of the front surface of the speaker 5 via the baffle ring 51, suppressing sound leakage from the outer periphery of the front surface of the speaker 5.

(2) Waterproof Structure Around the Speaker Next, the waterproof structure around the speaker 5 in the alarm device 10B according to this embodiment will be described.

In the alarm device 10B according to this embodiment, as shown in Figs. 30A to 31, a sound output hole 122 is formed in a specific region R100 corresponding to the speaker 5 in the cover 12 serving as the front wall of the housing 1. As described above, the sound output hole 122 is a hole for outputting the sound output from the speaker 5 to the outside of the housing 1. Specifically, as shown in Fig. 30A, the sound output hole 122 penetrating the cover 12 in the front-rear direction is formed in the cover 12 at a position facing the speaker 5 across the flat plate portion 111 of the body 11.

When the alarm device 10B is installed and used outdoors, liquid (water, etc.) may adhere to the surface of the housing 1. Therefore, the alarm device 10B is provided with a waterproof sheet 103 as a waterproof structure to prevent liquid that has entered through the sound output hole 122 from reaching the internal device 100, such as the speaker 5, housed in the housing 1. As shown in FIG. 31, the waterproof sheet 103 is formed to match the shape of the specific region R100 in the cover 12 in which the sound output hole 122 is formed, and is attached to the specific region R100 on the rear surface of the cover 12. As a result, the waterproof sheet 103 is disposed between the specific region R100 in the cover 12 in which the sound output hole 122 is formed and the speaker 5. In other words, the waterproof sheet 103 blocks the sound output hole 122. The waterproof sheet 103 is, for example, a resin sheet, and blocks liquid that enters from the sound output hole 122 to the speaker 5. The thickness of the waterproof sheet 103 is, for example, approximately 10 μm or more and 30 μm or less.

In short, the alarm device 10B according to this embodiment is equipped with a speaker 5 that is housed in a housing 1 and outputs an alarm sound upon receiving an alarm signal. A sound output hole 122 is formed in a specific area R100 corresponding to the speaker 5 in the front wall (cover 12) of the housing 1. A waterproof sheet 103 that blocks liquid that penetrates into the speaker 5 from the sound output hole 122 is disposed between the specific area R100 and the speaker 5. Here, as shown in FIG. 30B, there is a gap G10 between the specific area R100 and the waterproof sheet 103 that allows at least the vibration of the waterproof sheet 103. FIG. 30B is a schematic enlarged view of the area Z1 in FIG. 30A. In other words, the waterproof sheet 103 is attached to the rear surface of the cover 12 as the front wall of the housing 1, but is not attached so as to be in close contact with the rear surface of the cover 12, and forms a gap G10 between the waterproof sheet 103 and the rear surface of the cover 12 (specific area R100). The gap G10 between the specific region R100 and the waterproof sheet 103 is large enough to at least allow vibration of the waterproof sheet 103. As an example, the front-to-rear dimension of the gap G10 is larger than the thickness of the waterproof sheet 103.

That is, since the waterproof sheet 103 blocks the sound output hole 122, it is preferable to have a gap G10 between the waterproof sheet 103 and the cover 12 in order to suppress a decrease in the efficiency of sound extraction from the sound output hole 122 due to the waterproof sheet 103. In other words, in order to ensure that the sound pressure of the sound extracted to the outside of the housing 1 is as large as possible, it is preferable that the waterproof sheet 103 is in a state where it can vibrate. And, by vibrating the waterproof sheet 103 within the range of the gap G10, sound is more easily transmitted through the waterproof sheet 103 than in a state where the waterproof sheet 103 cannot vibrate at all, and the sound pressure is less likely to decrease in the waterproof sheet 103. Therefore, it is preferable that the gap G10 has a dimension that does not inhibit the vibration of the waterproof sheet 103 due to the sound output from the speaker 5.

In this embodiment, as shown in FIG. 31, a decorative member 102 is attached to the front surface 101 of the cover 12 at a position corresponding to the specific region R100. The decorative member 102 is, for example, a resin sheet-like member that covers the sound output hole 122 and the square hole 123. That is, the decorative member 102 of this embodiment is used in place of the first sheet 124 (see FIG. 8) that covers the sound output hole 122 of the first embodiment, and the second sheet 125 (see FIG. 8) that covers the square hole 123. In other words, one sheet-like decorative member 102 is used in place of the first sheet 124 and the second sheet 125. The decorative member 102 has a plurality of minute transmission holes 105 formed therein, similar to the first sheet 124 of the first embodiment. These transmission holes 105 communicate with the sound output hole 122. Therefore, the sound output from the speaker 5 passes through the sound output hole 122 and the multiple transmission holes 105 of the housing 1 (cover 12) and is output from the front surface 101 of the housing 1 (strictly speaking, the front surface of the decorative member 102).

As described above, the alarm device 10B according to this embodiment includes a decorative member 102. The decorative member 102 is attached to the front surface 101 of the housing 1 at a position corresponding to the specific region R100. The decorative member 102 has a plurality of transmission holes 105 formed therein that communicate with the sound output hole 122. Furthermore, the housing 1 has a partition bar 127 at a position that does not overlap with the plurality of transmission holes 105, which divides the sound output hole 122 into a plurality of zones in a front view.

More specifically, as shown in FIG. 32A, the specific region R100 has a central portion R101 and an outer peripheral portion R102 surrounding the central portion R101. FIG. 32A is a view of the main portion of the cover 12 from the rear, and the waterproof sheet 103 is omitted in FIG. 32A. The specific region R100 is, for example, polygonal (pentagonal in the example of FIG. 32A). The sound output hole 122 is formed in the central portion R101 of the specific region R100. The outer peripheral portion R102 of the specific region R100 is provided with an adhesive portion 104 for adhering the waterproof sheet 103 to the front wall (cover 12) of the housing 1. In other words, the waterproof sheet 103 is not adhered to the central portion R101 of the specific region R100, but is adhered only to the outer peripheral portion R102 surrounding the central portion R101.

In this embodiment, as an example, the adhesive portion 104 is made of a double-sided adhesive tape having a thickness equal to or greater than that of the waterproof sheet 103. In this manner, the waterproof sheet 103 is attached to the front wall (cover 12) of the housing 1 at the adhesive portion 104. The adhesive portion 104 is provided on the outer periphery R102 of the specific region R100 so as to surround the central portion R101 of the specific region R100. As a result, the waterproof sheet 103 is adhered to the housing 1 (cover 12) only at the outer periphery of the waterproof sheet 103, and a gap G10 equal to or greater than the thickness of the adhesive portion 104 is formed between the waterproof sheet 103 and the cover 12 at least in the central portion of the waterproof sheet 103.

The housing 1 (cover 12) also has partition bars 127 that divide the sound output hole 122 into a plurality of zones. The partition bars 127 include portions that extend in both the vertical direction (Z-axis direction) and the horizontal direction (X-axis direction), and are thus formed into a lattice shape as a whole. In this embodiment, as an example, the partition bars 127 have two portions that extend in the vertical direction and two portions that extend in the horizontal direction. Thus, the sound output hole 122 is divided into three zones in the vertical direction and three zones in the horizontal direction by the partition bars 127, for a total of nine zones. Here, the sound output hole 122 is not divided into all zones of the same shape, but is divided so that the central zone of the three zones is the widest in the vertical direction and the central zone of the three zones is the widest in the horizontal direction.

Here, each of the multiple transmission holes 105 formed in the decorative member 102 opens in a circular shape. These multiple transmission holes 105 are arranged in a grid pattern overall, with multiple holes in the vertical direction and multiple holes in the horizontal direction. In this embodiment, as an example, a total of 70 transmission holes 105 are formed in the decorative member 102, with seven holes in the vertical direction and ten holes in the horizontal direction.

The partition bar 127 is located at a position that does not overlap with the multiple transmission holes 105 formed in the decorative member 102 in the front-rear direction. In other words, the partition bar 127 is arranged so as to pass between two adjacent transmission holes 105 among the multiple transmission holes 105 formed in the decorative member 102. As a result, as shown in FIG. 32A, the multiple transmission holes 105 are distributed and arranged in each area divided by the partition bar 127, and none of the multiple transmission holes 105 is blocked by the partition bar 127. In this way, since the multiple transmission holes 105 that communicate with the sound output hole 122 are not blocked by the partition bar 127, the sound output from the speaker 5 is easily output from the front surface 101 of the housing 1 without being blocked by the partition bar 127.

In addition, in the alarm device 10B according to this embodiment, as shown in FIG. 32B, the decorative member 102 has a dummy hole 106. The dummy hole 106 does not penetrate the decorative member 102, but imitates at least one of the multiple transmission holes 105 (the transmission hole 105). In this embodiment, the decorative member 102 has multiple dummy holes 106, but it is sufficient that at least one dummy hole 106 is provided in the decorative member 102. Although the dummy hole 106 is called a "hole," it only imitates the transmission hole 105 in appearance, and is not structurally a "hole" that penetrates the decorative member 102. In short, the decorative member 102 has multiple transmission holes 105 that penetrate the decorative member 102, and at least one dummy hole 106 that does not penetrate the decorative member 102.

More specifically, the dummy hole 106 is composed of a black figure (circular in this case) drawn on the surface (front surface) of the decorative member 102. In other words, the dummy hole 106 is drawn on the surface of the decorative member 102 by, for example, printing or painting so as to look similar to the through hole 105. In particular, in this embodiment, since the member except for the back of the through hole 105 in the front view is black, the dummy hole 106 drawn with a black figure is difficult to distinguish from the through hole 105. Such dummy holes 106 are arranged in a ring shape surrounding the area in which the multiple through holes 105 are formed in the decorative member 102, for example. Moreover, the interval between the multiple dummy holes 106 is the same as the interval between the multiple through holes 105, so that it is even more difficult to distinguish between the dummy holes 106 and the through holes 105. In the example of FIG. 32B, the multiple dummy holes 106 are arranged in a row above, below, left, and right of the area in which the multiple transmission holes 105 are formed, but this is not limiting, and multiple rows may be arranged, for example, either above or below. Here, sound output holes 122 are not formed in positions of the cover 12 that overlap with the multiple dummy holes 106. In other words, the dummy holes 106 are provided in positions that extend beyond the speaker 5 when viewed from the front.

The presence of such dummy holes 106 makes it appear to a person looking at the alarm device 10B that the through holes 105 are wider than the size of the speaker 5, and makes it appear that a speaker 5 larger than its actual size is housed within the housing 1.

(3) Sound Output from the Speaker Next, the sound output from the speaker 5 in the alarm device 10B according to this embodiment will be described.

As described above, the alarm device 10B according to this embodiment uses a thinner speaker 5 compared to that of embodiment 1. Such a thinner speaker 5 has sound output characteristics that differ from those of the speaker 5 of embodiment 1. On the other hand, in consideration of the performance required of the alarm device 10B, the present embodiment employs the configuration described below for the output sound of the speaker 5 so that an alarm sound can be output with the same sound pressure as the alarm device 10A of embodiment 1.

That is, as described above, the alarm device 10B according to this embodiment is equipped with a speaker 5 that is housed in the housing 1 and outputs an alarm sound upon receiving an alarm signal. Here, the speaker 5 simultaneously outputs a first output sound and a second output sound. The second output sound is a sound with a higher frequency than the first output sound. Specifically, the first output sound is a sound with the same frequency as the output sound output as an alarm sound by the speaker 5 in the alarm device 10 according to embodiment 1. On the other hand, the second output sound is a sound with a frequency n times (n is an integer equal to or greater than 2) that of the first output sound. In other words, the second output sound is an nth harmonic with the first output sound as the fundamental wave.

In this embodiment, as shown in FIG. 33, the speaker 5 simultaneously outputs the first output sound and the second output sound by playing the sound source 501 including the first output sound and the second output sound. FIG. 33 is a conceptual diagram showing how the sound source 501 is played and sound (the first output sound and the second output sound) is output from the speaker 5. Here, as shown in FIG. 33, the alarm device 10B according to this embodiment includes the sound source 501 and the amplifier 502 in addition to the speaker 5. The sound source 501 is a non-transient recording medium that records data for playing the first output sound and the second output sound, and is mounted on the circuit board 4. The amplifier 502 amplifies the audio signal Si3 output from the sound source 501 when the sound source 501 is played. The audio signal Si3 amplified by the amplifier 502 is input to the speaker 5, which drives the speaker 5 and outputs the output sound from the speaker 5.

That is, in this embodiment, since the sound source 501 includes the first output sound and the second output sound, as shown in FIG. 33, the audio signal Si3 output from the sound source 501 is composed of a composite signal of the first signal Si1 corresponding to the first output sound and the second signal Si2 corresponding to the second output sound. In other words, when only the first signal Si1 is reproduced in the sound source 501, only the first output sound is output from the speaker 5. Similarly, when only the second signal Si2 is reproduced in the sound source 501, only the second output sound is output from the speaker 5. In this embodiment, since the sound signal Si3 obtained by synthesizing the first signal Si1 and the second signal Si2 is recorded in the sound source 501, the first output sound and the second output sound are simultaneously output from the speaker 5 by reproducing this sound source 501.

In the alarm device 10B according to this embodiment, as described above, a thinner speaker 5 is used compared to that of embodiment 1, and therefore the speaker 5 has sound output characteristics such that the sound pressure is greater in the high frequency band compared to that of the speaker 5 of embodiment 1. In FIG. 34A, the speaker characteristics of the speaker 5 of embodiment 1 are shown in graph Gr1, and the speaker characteristics of the thin speaker 5 of this embodiment are shown in graph Gr2, with the vertical axis representing sound pressure and the horizontal axis representing frequency. That is, as shown in FIG. 34A, the thin speaker 5 of this embodiment has a higher sound pressure in the high frequency band and a lower sound pressure in the low frequency band compared to the characteristics of the speaker 5 of embodiment 1. More specifically, when a frequency band lower than the specific frequency f1 is defined as the first frequency band B1, and a frequency band equal to or higher than the specific frequency f1 is defined as the second frequency band B2, the thin speaker 5 of this embodiment can achieve a relatively high sound pressure in the second frequency band B2. In other words, the thin speaker 5 of this embodiment has a higher sound pressure in the second frequency band B2 and a lower sound pressure in the first frequency band B1 compared to the characteristics of the speaker 5 of embodiment 1.

In this way, since a thin speaker 5 that excels in a relatively high frequency band (second frequency band B2) is used, in this embodiment, it is preferable that the speaker 5 simultaneously outputs the first output sound and the second output sound having a higher frequency than the first output sound. This allows the speaker 5 to earn sound pressure from the second output sound superimposed on the first output sound while outputting a sound with the frequency of the first output sound. As a result, the alarm device 10B according to this embodiment can maintain the sound pressure of the alarm sound while using a thin speaker 5. In other words, by increasing the sound pressure of the second output sound, which is a harmonic, the overall sound pressure of the output sound from the speaker 5, which is a composite sound of the first output sound and the second output sound, increases, and the inferiority in sound pressure is suppressed compared to the speaker 5 of embodiment 1.

Furthermore, in this embodiment, the frequency band of the first output sound is variable. In particular, in this embodiment, since the second output sound is a harmonic with the first output sound as a fundamental wave, if the frequency band of the first output sound changes, the frequency band of the second output sound also changes accordingly. Specifically, the frequencies of the first output sound and the second output sound are continuously changed by continuously changing the frequencies of the first signal Si1 and the second signal Si2 output by playing the sound source 501. If the frequency band of the sound output from the speaker 5 changes, people are more likely to notice the alarm sound compared to when a sound of a constant frequency is output.

In addition, in this embodiment, as described above, the first frequency band B1 and the second frequency band B2 are defined by the speaker characteristics unique to the speaker 5. The second frequency band B2 is a frequency band in which the ratio of sound pressure to the amplitude of the electrical signal input to the speaker 5 is higher than that of the first frequency band B1. Here, as shown in FIG. 34B, the speaker 5 repeatedly outputs an alarm sound, and the frequency band of the first output sound in one alarm sound changes between multiple frequency bands including the first frequency band B1 and the second frequency band B2. And, in one alarm sound, the period of the second frequency band B2 is longer than the period of the first frequency band B1.

Figure 34B shows the frequency of the alarm sound output from the speaker 5, with the vertical axis representing frequency and the horizontal axis representing time. In the example shown in Figure 34B, within the cycle T1 of one alarm sound, the period T12 of the second frequency band B2 is more than twice as long as the period T11 of the first frequency band B1. In other words, within one alarm sound, the period T12 during which a sound of a specific frequency f1 or more is output is more than twice as long as the period T11 during which a sound of a specific frequency f1 or more is output. In this way, within one alarm sound, the period T12 of the frequency band that the speaker 5 is relatively good at (here, the second frequency band B2) is longer than the period T11 of the frequency band that the speaker 5 is relatively bad at (here, the first frequency band B1), thereby increasing the output efficiency of the alarm sound.

(4) Other Differences Next, the main differences between the configuration of the alarm device 10B according to this embodiment and the alarm device 10 according to the first embodiment, other than the speaker 5 and its surroundings, will be described.

In the alarm device 10B according to this embodiment, as shown in Figs. 35A and 35B, the light source unit 32 is electrically connected to the circuit board 4 in a detachable manner. The light source unit 32 is also attached to the housing 1 in a detachable manner. This allows the light source unit 32 to be replaced. Specifically, in this embodiment, similar to the second embodiment, the multiple light-emitting elements 321 constituting the light source unit 32 are mounted on the LED board 36. However, in this embodiment, the light source unit 32 is composed of two light-emitting elements 321. The LED board 36 is a board separate from the circuit board 4, and is electrically connected to the circuit board 4 in a detachable manner by a connector. The LED board 36 is disposed above the light-guiding member 33 and in a position facing the tip surface (upper surface) of the incident portion 331. The LED board 36 is disposed with the mounting surface of the multiple light-emitting elements 321 facing downward (negative direction of the Z axis).

The alarm device 10B according to this embodiment further includes a light source cover 37 that covers the LED board 36. The light source cover 37 is removably attached to the flat plate portion 111 of the body 11. The light source cover 37 has holes 371 formed in positions corresponding to the light emitting elements 321 that constitute the light source portion 32 for passing light from the light source portion 32. In other words, even when the light source cover 37 is attached to the body 11, the light from the light source portion 32 reaches the incident portion 331 of the light guide member 33 through the light source cover 37.

The light source cover 37 has plug-in pieces 372 protruding from both end faces in the left-right direction (X-axis direction). A pair of plug-in grooves 373 are formed in the flat plate portion 111 of the body 11 at positions corresponding to the pair of plug-in pieces 372. Therefore, the light source cover 37 can be attached to the flat plate portion 111 from the front by inserting the pair of plug-in pieces 372 into the pair of plug-in grooves 373. Then, by removing the light source cover 37 from the body 11, the LED board 36 is exposed and the LED board 36 can be removed. The LED board 36 can also be attached to the flat plate portion 111 from the front, similar to the light source cover 37.

As described above, in this embodiment, as in the first embodiment, the intermediate member 34 (see FIG. 10) is omitted, and the light source unit 32 emits light directly to the incident portion 331 of the light guide member 33. In short, in this embodiment, the light source unit 32 is disposed at a position facing the incident portion 331 and outputs light toward the incident portion 331. Therefore, since there is no loss in the intermediate member 34, the light of the light source unit 32 can be efficiently incident on the light guide member 33. Furthermore, since the light source unit 32 is provided on the LED board 36 that is independent of the circuit board 4, the housing 1, and the light guide member 33, it is possible to replace only the light source unit 32 while leaving the circuit board 4, the housing 1, the light guide member 33, etc. intact. As a result, the maintainability of the alarm device 10B is improved.

(5) Modifications The third embodiment is merely one of various embodiments of the present disclosure. All drawings referred to in the third embodiment are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios. Various modifications of the third embodiment are possible depending on the design, etc., as long as the object of the present disclosure can be achieved. The modifications described below can be applied in appropriate combination.

(5.1) First Modification In a first modification of the third embodiment, as shown in Figures 36A and 36B, the positional relationship between the adhesive part 104 for adhering the waterproof sheet 103 and the sound output hole 122 differs from that of the alarm device 10B according to the third embodiment. Figure 36B is a cross-sectional view taken along line X1-X1 in Figure 36A.

That is, in this modified example, the upper edge of the portion of the adhesive portion 104 located below the sound output hole 122 (negative direction of the Z axis) and the lower edge of the sound output hole 122 are aligned in the vertical direction (Z axis direction). Furthermore, the lower edge of the transmission hole 105 located at the lowest level among the multiple transmission holes 105 and the upper edge of the portion of the adhesive portion 104 located below the sound output hole 122 are aligned in the vertical direction (Z axis direction). Therefore, as shown in FIG. 36B, the upper edge of the portion of the adhesive portion 104 located below the sound output hole 122, the lower edge of the sound output hole 122, and the lower edge of the transmission hole 105 located at the lowest level among the multiple transmission holes 105 are flush with each other.

Therefore, even if liquid (such as water) seeps into the sound output hole 122 through one of the multiple transmission holes 105, the liquid can be discharged to the outside of the housing 1 through the transmission hole 105 located at the lowest position among the multiple transmission holes 105. In other words, according to the configuration of this modified example, liquid that seeps into the sound output hole 122 is less likely to accumulate in the gap between the rear surface of the cover 12 and the waterproof sheet 103.

In addition, in this disclosure, "matching positions" does not only mean being in the exact same position, but also includes being in approximately the same position, i.e., being substantially the same. For example, when A and B are said to be in the same vertical position (height), A and B do not have to be in exactly the same position (height) in the vertical direction. In other words, when A and B are said to be in the same vertical position, A needs to be at approximately the same height as B, and A may protrude slightly more than B (stick out) or A may be slightly recessed more than B in the vertical direction.

(5.2) Other Modifications Modifications other than the first modification of the third embodiment are listed below.

The alarm device 10B according to the third embodiment has been described as a "composite device" that has not only the function of the activation unit 2 that accepts human operation, but also the function of displaying with the indicator light 3 and the function of outputting an alarm sound from the speaker 5, but is not limited to this example. In other words, each component of the alarm device 10B can also be applied to disaster prevention equipment other than a "composite device," such as an integrated panel (equipment housing box) that combines a fire alarm and an audio device.

When the alarm device 10B is a disaster prevention device such as a general panel, the activation unit 2 (fire transmitter) has an electronic circuit, and the activation unit 2 (fire transmitter) itself outputs an electric signal (alarm signal) in response to the operation of the push button 21. Furthermore, the alarm device 10B consisting of a disaster prevention device such as a general panel does not operate alone, but cooperates with the receiver of the automatic fire alarm system. In other words, the alarm device 10B consisting of a disaster prevention device such as a general panel is used as one component of an automatic fire alarm system equipped with a detector such as a heat detector, smoke detector, or flame detector, and a receiver that receives an alarm signal (fire signal) from the detector. Furthermore, the alarm device 10B consisting of a disaster prevention device such as a general panel does not operate with the power of the storage battery 7, but with the power supply from the receiver of the automatic fire alarm system. Furthermore, the alarm device 10B consisting of a disaster prevention device such as a general panel may have a bell instead of the speaker 5 as an audio device, and may output an alarm sound by ringing the bell instead of an electronic sound. Furthermore, the alarm device 10B, which is a disaster prevention device such as an integrated panel, may omit the test operation unit 8 that accepts test operations.

In addition, in the alarm device 10B according to the third embodiment, it is not essential that the light source unit 32 is mounted on an LED board 36 separate from the circuit board 4, as explained in "(4) Other differences". In other words, in the alarm device 10B according to the third embodiment, similar to the first embodiment, the light source unit 32 may be mounted on the circuit board 4, and the light from the light source unit 32 may be guided to the light-guiding member 33 by the intermediate member 34.

The baffle member is not limited to a circular member such as the baffle ring 51, but may be, for example, polygonal. The baffle member is not limited to being made of resin, but may be, for example, made of wood, ceramic, or metal.

Furthermore, the flexible portion 542 need only be more flexible than other portions of the back cover 113, and is not limited to being a thin portion. For example, the flexible portion 542 may be beam-shaped, or may be made of a material with a lower elastic modulus than other portions of the back cover 113.

In addition, in the second embodiment, the tip of the protrusion 541 is in direct contact with the rear surface of the speaker 5, but a baffle plate 52 (see FIG. 11) may be interposed between the rear surface of the speaker 5 and the tip of the protrusion 541.

The adhesive portion 104 is not limited to a double-sided adhesive tape having a thickness equal to or greater than that of the waterproof sheet 103, but may be a double-sided adhesive tape having a thickness less than that of the waterproof sheet 103, or may be something other than a double-sided adhesive tape. The adhesive portion 104 may be any means for attaching the waterproof sheet 103 to the front wall (cover 12) of the housing 1, and may be, for example, an adhesive or a welded portion such as laser welding.

The second output sound may be any sound with a higher frequency than the first output sound, and is not limited to being the nth harmonic of the first output sound as a fundamental wave.

The configuration (including modified examples) described in embodiment 3 can be adopted in appropriate combination with the various configurations (including modified examples) described in embodiment 1 or embodiment 2.

(summary)
As described above, the alarm device (10, 10A, 10B) according to the first aspect includes a housing (1), an activation unit (2, 2A), an indicator light (3, 3A), and a circuit board (4). The activation unit (2, 2A) has a push button (21, 21A) including an operation surface (211, 211A) arranged on the front surface (101) of the housing (1), and a movable element (22) interlocked with the push button (21, 21A). When the push button (21, 21A) is operated so that the operation surface (211, 211A) is pressed, the movable element (22) of the activation unit (2, 2A) moves from a first position to a second position. The indicator light (3, 3A) has a light-emitting portion (311) arranged on the front surface (101) of the housing (1). The circuit board (4) is accommodated in the housing (1). The circuit board (4) outputs an alert signal when triggered by movement of the mover (22) from the first position to the second position. The light emitting portion (311) is formed in a ring shape surrounding the operation surface (211, 211A) in a front view.

According to this embodiment, the activation unit (2, 2A) and the indicator light (3, 3A) are arranged together in one location on the front surface (101) of the housing (1). In other words, since the operation surface (211, 211A) is arranged inside the light-emitting portion (311), it is easier to reduce the size of the housing (1) compared to a configuration in which the indicator light (3, 3A) and the activation unit (2, 2A) are arranged separately.

In the alarm device (10, 10A, 10B) according to the second aspect, in the first aspect, the light-emitting portion (311) is flush with at least the periphery of the light-emitting portion (311) on the front surface (101) of the housing (1).

According to this embodiment, the indicator light (3, 3A) does not protrude from the front surface (101) of the housing (1), and the amount of protrusion of the indicator light (3, 3A) from the mounting object can be kept relatively small.

In the alarm device (10, 10A, 10B) according to the third aspect, in the first or second aspect, the light-emitting unit (311) is flush with the operation surface (211, 211A).

According to this embodiment, the operation surface (211, 211A) is easier to operate than when the operation surface (211, 211A) is located further back than the light-emitting unit (311).

In the alarm device (10, 10A, 10B) according to the fourth aspect, in any of the first to third aspects, an annular plate (241) is located between the light-emitting unit (311) and the operation surface (211, 211A) in a front view. The light-emitting unit (311) is flush with the front surface of the annular plate (241).

According to this embodiment, depressions are less likely to occur on the front surface (101) of the housing (1), the internal space of the housing (1) can be effectively utilized, and the dimensions of the housing (1) itself can be kept relatively small. Furthermore, dirt is less likely to accumulate on the front surface (101) of the housing (1), which reduces the maintenance work required for the housing (1).

In the alarm device (10, 10A, 10B) according to the fifth aspect, in any one of the first to fourth aspects, the operation surface (211, 211A) is located at the center of the area surrounded by the light-emitting unit (311).

According to this embodiment, even when the position of the operation surface (211, 211A) is identified by relying on the light of the light-emitting unit (311), it becomes easier to identify the position of the operation surface (211, 211A).

In the alarm device (10, 10A, 10B) according to the sixth aspect, in any one of the first to fifth aspects, the light-emitting unit (311) is annular. The operation surface (211, 211A) is concentric with the light-emitting unit (311).

According to this embodiment, even when the position of the operation surface (211, 211A) is determined by relying on the light from the light-emitting unit (311), it becomes easier to determine the position of the operation surface (211, 211A).

The alarm device (10, 10A, 10B) according to a seventh aspect is any one of the first to sixth aspects, wherein the activation unit (2, 2A) further includes a recovery button (23, 23A) for returning the movable element (22) from the second position to the first position. The recovery button (23, 23A) is disposed between the light-emitting portion (311) and the operation surface (211, 211A) in a front view.

According to this embodiment, by arranging the recovery button (23, 23A), the space between the light-emitting unit (311) and the operation surface (211, 211A) can be effectively utilized.

In the alarm device (10, 10A, 10B) according to the eighth aspect, the circular area arranged on a part of the front surface (101) of the housing (1) in the seventh aspect is divided into two areas along one diameter of the circular area. The two areas are the front surfaces of the operation surface (211, 211A) and the recovery button (23, 23A), respectively.

According to this embodiment, the operation surface (211, 211A) and the front surface of the recovery button (23, 23A) form a circular area as a whole, so the push button (21, 21A) and the recovery button (23, 23A) fit neatly.

In the alarm device (10, 10A, 10B) according to the ninth aspect, in any of the first to eighth aspects, the activation unit (2, 2A) is attached to the front wall of the housing (1) so that at least a portion of it faces the rear surface of the front wall of the housing (1).

This embodiment makes it easier to attach the starting unit (2, 2A) to the housing (1).

In the alarm device (10, 10A, 10B) according to the tenth aspect, in the ninth aspect, the indicator light (3, 3A) has a light body cover (31) including a light emitting portion (311). The activation unit (2, 2A) is attached to the front wall of the housing (1) with the light body cover (31) sandwiched between the activation unit (2, 2A) and the front wall of the housing (1).

This configuration improves assembly ease compared to when the lamp cover (31) is attached separately from the starting unit (2, 2A).

The alarm device (10, 10A, 10B) according to the eleventh aspect further includes a speaker (5) in any one of the first to tenth aspects. The speaker (5) is housed in the housing (1) and outputs an alarm sound upon receiving an alarm signal. A sound output hole (122) is formed in a specific area (R100) of the front wall (cover 12) of the housing (1) corresponding to the speaker (5). A waterproof sheet (103) is disposed between the specific area (R100) and the speaker (5) to block liquid that seeps into the speaker (5) from the sound output hole (122). Between the specific area (R100) and the waterproof sheet (103), there is a gap (G10) that allows at least vibration of the waterproof sheet (103).

According to this embodiment, the waterproof sheet (103) blocks liquid from entering the speaker (5) through the sound output hole (122), while allowing the waterproof sheet (103) to vibrate, so it is easy to minimize the amount of reduction in the sound output from the speaker (5) caused by the waterproof sheet (103).

In the alarm device (10, 10A, 10B) according to the twelfth aspect, in the eleventh aspect, the waterproof sheet (103) is attached to the front wall of the housing (1) at the adhesive part (104). The adhesive part (104) is provided on the outer periphery (R102) of the specific area (R100) so as to surround the center part (R101) of the specific area (R100).

According to this embodiment, the waterproof sheet (103) is not adhered to the central portion (R101) of the specific region (R100), but is adhered only to the outer peripheral portion (R102) surrounding the central portion (R101). Therefore, the vibration of the waterproof sheet (103) in the central portion (R101) of the specific region (R100) is not easily hindered.

In the alarm device (10, 10A, 10B) according to the thirteenth aspect, in the twelfth aspect, the upper edge of the portion of the adhesive portion (104) that is located below the sound output hole (122) is aligned in the up-down direction with the lower edge of the sound output hole (122).

According to this embodiment, even if liquid (water, etc.) enters the sound output hole (122), the liquid is unlikely to accumulate in the gap.

The alarm device (10, 10A, 10B) according to the 14th aspect is any one of the 11th to 13th aspects, and further includes a decorative member (102). The decorative member (102) is attached to a position on the front surface (101) of the housing (1) that corresponds to a specific region (R100). The decorative member (102) has a plurality of transmission holes (105) that communicate with the sound output hole (122). The housing (1) has a partition bar (127) that divides the sound output hole (122) into a plurality of zones in a front view, at a position that does not overlap with the plurality of transmission holes (105).

According to this embodiment, the multiple transmission holes (105) that communicate with the sound output hole (122) are not blocked by the partition bar (127), so the sound output from the speaker (5) is easily output from the front surface (101) of the housing (1) without being blocked by the partition bar (127).

In the alarm device (10, 10A, 10B) according to the fifteenth aspect, in the fourteenth aspect, the decorative member (102) has a dummy hole (106). The dummy hole (106) does not penetrate the decorative member (102) and imitates at least one of the multiple through holes (105).

According to this embodiment, it is possible to make it appear as if the through holes (105) are present over a wider area than the size of the speaker (5), and it is possible to make it appear as if a speaker (5) larger than its actual size is housed in the housing (1). This gives a visual sense of security that a loud sound is being output from the speaker (5).

The configurations according to the second to fifteenth aspects are not essential for the alarm device (10, 10A, 10B) and may be omitted as appropriate.

REFERENCE SIGNS LIST 1 Housing 2, 2A Start-up unit 3, 3A Indicator light 4 Circuit board 5 Speaker 10, 10A, 10B Alarm device 21, 21A Push button 22 Movable element 23, 23A Recovery button 31 Light body cover 101 Front surface of housing 102 Decorative member 103 Waterproof sheet 104 Adhesive portion 105 Transparent hole 106 Dummy hole 122 Sound output hole 211, 211A Operation surface 241 Annular plate 311 Light-emitting portion R100 Specific area R101 Central portion R102 Outer periphery

Claims (14)

Housing and
an activation unit including a push button including an operation surface disposed on a front surface of the housing, a movable element interlocked with the push button, and a recovery button, the movable element moving from a first position to a second position when the push button is operated so as to press the operation surface;
an indicator light having a light emitting portion disposed on a front surface of the housing;
a circuit board that is accommodated in the housing and outputs an alarm signal when the movable element moves from the first position to the second position,
The light emitting unit is formed in a ring shape surrounding the operation surface in a front view,
The recovery button is
a button for returning the movable element from the second position to the first position,
When viewed from the front, the light-emitting unit is disposed between the light-emitting unit and the operation surface in an exposed state .
Alarm device. The light emitting portion is flush with at least the periphery of the light emitting portion on the front surface of the housing.
2. The alarm device of claim 1. The light emitting unit is flush with the operation surface.
3. An alarm device according to claim 1 or 2. When viewed from the front, an annular plate is located between the light emitting unit and the operation surface,
The light emitting portion is flush with the front surface of the annular plate.
The alarm device according to any one of claims 1 to 3. The operation surface is located at the center of the area surrounded by the light-emitting unit.
The alarm device according to any one of claims 1 to 4. The light emitting portion is annular,
The operation surface is concentric with the light-emitting unit.
The alarm device according to any one of claims 1 to 5. a circular region disposed on a portion of a front surface of the housing, the circular region being divided into two regions along one diameter of the circular region;
The two areas are the operation surface and the front surface of the recovery button, respectively.
The alarm device according to any one of claims 1 to 6. The starting unit is attached to the front wall of the housing such that at least a portion of the starting unit faces a rear surface of the front wall of the housing.
An alarm device according to any one of claims 1 to 7. The indicator lamp has a lamp body cover including the light emitting portion,
The starting unit is attached to the front wall of the housing with the lamp cover sandwiched between the starting unit and the front wall of the housing.
9. An alarm device according to claim 8. The device further includes a speaker that is accommodated in the housing and that outputs an alarm sound in response to the alarm signal.
A sound output hole is formed in a specific area of the front wall of the housing corresponding to the speaker,
a waterproof sheet is disposed between the specific area and the speaker to prevent liquid from entering the speaker through the sound output hole;
Between the specific area and the waterproof sheet, there is a gap that allows at least the waterproof sheet to vibrate.
The alarm device according to any one of claims 1 to 9. The waterproof sheet is attached to the front wall of the housing at an adhesive portion provided on the outer periphery of the specific area so as to surround the central portion of the specific area.
11. An alarm device according to claim 10. Housing and
an activation unit including a push button including an operation surface disposed on a front surface of the housing and a movable element linked to the push button, the movable element moving from a first position to a second position when the push button is operated so as to press the operation surface;
an indicator light having a light emitting portion disposed on a front surface of the housing;
a circuit board accommodated in the housing and configured to output an alarm signal when the movable element moves from the first position to the second position;
a speaker that is accommodated in the housing and that outputs an alarm sound in response to the alarm signal;
The light emitting unit is formed in a ring shape surrounding the operation surface in a front view,
A sound output hole is formed in a specific area of the front wall of the housing corresponding to the speaker,
a waterproof sheet is disposed between the specific area and the speaker to prevent liquid from entering the speaker through the sound output hole;
Between the specific area and the waterproof sheet, there is a gap that allows at least vibration of the waterproof sheet,
The waterproof sheet is attached to the front wall of the housing at an adhesive portion provided on the outer periphery of the specific area so as to surround the central portion of the specific area,
an upper end edge of the adhesive portion located below the sound output hole and a lower end edge of the sound output hole are aligned in the up-down direction;
Alarm device. Housing and
an activation unit including a push button including an operation surface disposed on a front surface of the housing and a movable element linked to the push button, the movable element moving from a first position to a second position when the push button is operated so as to press the operation surface;
an indicator light having a light emitting portion disposed on a front surface of the housing;
a circuit board accommodated in the housing and configured to output an alarm signal when the movable element moves from the first position to the second position;
a speaker that is accommodated in the housing and that outputs an alarm sound upon receiving the alarm signal;
A decorative member,
The light emitting unit is formed in a ring shape surrounding the operation surface in a front view,
A sound output hole is formed in a specific area of the front wall of the housing corresponding to the speaker,
a waterproof sheet is disposed between the specific area and the speaker to prevent liquid from entering the speaker through the sound output hole;
Between the specific area and the waterproof sheet, there is a gap that allows at least vibration of the waterproof sheet,
the decorative member is attached to a front surface of the housing at a position corresponding to the specific area,
The decorative member has a plurality of transmission holes formed therein and communicating with the sound output hole,
The housing has a partition bar that divides the sound output hole into a plurality of zones in a front view at a position not overlapping with the plurality of transmission holes.
Alarm device. the decorative member has a dummy hole that does not penetrate the decorative member and that simulates at least one of the plurality of through holes;
14. An alarm device according to claim 13.

Images