JP6556571B2 - Alarm - Google Patents

Description

  The present invention relates to an alarm device.

  Conventionally, it has a built-in gas sensor, a built-in alarm device that detects gas leaks such as city gas, and a CO sensor, a built-in CO sensor, a built-in alarm device that detects carbon monoxide and issues a warning, and a fire sensor. An alarm device that detects a predetermined event and issues an alarm, such as an alarm device that detects the occurrence of a fire and issues an alarm, is known. In this type of alarm device, the alarm can be stopped or the alarm device can be inspected by operating the switch through the operation unit provided in the case body.

  Moreover, since an alarm device may be attached to a position close to the ceiling surface of a ceiling surface or a wall surface, one having a drawstring has been proposed. In this alarm device, the operation unit is indirectly operated by pulling the pull string, and thus the switch can be operated (see, for example, Patent Documents 1 and 2).

JP 2009-86927 A JP 2010-20679 A

  However, according to the methods disclosed in Patent Documents 1 and 2, the pull string is detachable from the case body, and when the pull string is attached to the case body, it is formed on the back side of the case body. In addition, it is necessary to hook the drawstrings to a plurality of engagement points and fix them. For this reason, the work of attaching the drawstring to the case main body has become complicated, which has been a burden on the operator.

  This invention is made | formed in view of this situation, The objective is to provide the alarm device which can transmit the operation by a drawstring to a switch reliably while being excellent in the attachment property of a drawstring.

  In order to solve this problem, the present invention provides an alarm device having a case-like case body, a switch accommodated in the case body, and a pull string for performing a pulling operation. In this case, the case main body is provided at the front portion of the case forming the front side of the case main body, the pressing operation portion that presses the switch in response to the pressing operation, and the pressing operation portion and the position on the back side of the case front portion. The case claw is formed on the case and the back of the case that forms the back side of the case body, and is attached to insert the drawstring into the case body along the direction parallel to the pressing direction. And a hole. The pull string has a hook portion that engages with the case claw when inserted into the case main body through the mounting hole, and a string member that is connected to the hook portion and hangs down from the case main body. doing. Then, when the string member is pulled, the hook part changes the force in the hanging direction acting on the string member to the force in the pressing operation direction, thereby transmitting the force for pressing the switch to the pressing operation part. To do.

  Here, in this invention, it is preferable that a press operation part is comprised so that a switch can be pressed by elastically deforming inward of a case main body according to press operation. Further, the hook portion is held in the case main body so as to be able to advance and retreat along the pressing operation direction, and when the string member is pulled, the case claw portion is retracted toward the back side of the case main body along the pressing operation direction. It is desirable that the pressing operation portion is elastically deformed inward of the case body by pulling.

  Moreover, in this invention, it is preferable that the string member is detachably connected with respect to the hook part.

  Further, in the present invention, the hooking portion is provided on the main body portion formed of a rectangular plate having a long shape, on the one end portion of the main body portion, the engaging claw that engages with the case claw portion, and on the other end of the main body portion. It is preferable to include a hook that is provided at a position close to the inside from the end portion and that locks the string member.

  Furthermore, in this invention, it is preferable that the case nail | claw part protrudes along the pressing operation direction from the back side of a case front part, and is set to the length shorter than the length of a main-body part.

  ADVANTAGE OF THE INVENTION According to this invention, while being excellent in the attachment property of a drawstring, the alarm device which can transmit operation by a drawstring reliably to a switch can be provided.

The front view which shows typically the alarm device concerning this embodiment Sectional drawing which shows AA cross section of the alarm device shown in FIG. Sectional view showing the main part of the alarm Explanatory drawing which shows the structure of a drawstring Explanatory drawing which shows the structure of a hook part Explanatory drawing which shows the attachment process of a drawstring

  FIG. 1 is a front view schematically showing an alarm device 1 according to the present embodiment, and FIG. 2 is a cross-sectional view showing an AA section of the alarm device 1 shown in FIG. In FIG. 1, the upper side of the paper corresponds to the vertical upper side when the alarm device 1 is installed, and the lower side of the paper corresponds to the lower vertical side when the alarm device 1 is installed. The alarm device 1 according to the present embodiment is an alarm device that performs an alarm for, for example, a fire or carbon monoxide (CO), and detects events (heat and smoke due to fire, carbon monoxide due to incomplete combustion) that occurred at the installation location. Detect and alert. The alarm device 1 is of a battery type, and is used by being installed on, for example, an indoor wall.

  The alarm device 1 is mainly composed of a case main body 10, a substrate 30, a fire sensor 50, and a CO sensor 60.

  The case body 10 is a housing that accommodates the substrate 30, the fire sensor 50, the CO sensor 60, the battery 70, and the like, and is formed of a synthetic resin or the like. The case body 10 includes a lower case 11 and an upper case 12 that are separable from each other, and a housing is formed by fitting the lower case 11 and the upper case 12 together. When the alarm device 1 is installed, it is fixed to a wall or the like via a mounting plate 20 described later so that the upper case 12 is on the front side and the lower case 11 is on the back side.

  The lower case 11 forms the back side of the case body 10 and is composed of a box-like member with the front side opened. The lower case 11 includes a rectangular plate-shaped back surface portion (case back surface portion) 11a and a rectangular frame-shaped peripheral wall portion 11b erected on the periphery of the back surface portion 11a.

  The upper case 12 forms the front side of the case body 10 and is composed of a box-like member whose back side is open. The upper case 12 includes a rectangular plate-shaped front portion 12a and a rectangular frame-shaped peripheral wall portion 12b erected on the periphery of the front portion 12a.

  Moreover, the front part 12a of the upper case 12 is provided with the vertically long rectangular decorative panel 13 on the front side so as to cover the center part. In the present embodiment, the front part 12 a and the decorative panel 13 constitute a case front part that forms the front side of the case body 10.

  The upper case 12 (the front part 12a including the decorative panel 13) is provided with a slit 14, a display part 15, a speaker output part 16, and an operation part 17.

  The slit 14 is an opening that penetrates the inside and outside of the case body 10. For example, a plurality of slits 14 are formed at positions extending from the peripheral wall portion 12 b of the upper case 12 to the front surface portion 12 a. The atmosphere around the alarm device 1 flows into the sensor chamber for the CO sensor 60 formed in the case body 10 through these slits 14.

  The display unit 15 is formed at a position corresponding to the plurality of LEDs 33 mounted on the substrate 30. The display unit 15 includes, for example, an opening in which a part of the decorative panel 13 is cut out in a horizontally-long rectangular shape, and the LED 33 can be visually recognized from the outside through the opening and the opening formed in the front part 12a. Is. In addition, a transparent or translucent plate-like plate that closes the opening is disposed in the opening forming the display unit 15.

  The speaker output unit 16 is formed at a position corresponding to the speaker 31 mounted on the substrate 30. For example, the speaker output unit 16 includes a plurality of slits formed in the front surface portion 12a, and outputs the sound or sound output from the speaker 31 to the outside.

  The operation unit 17 is formed at a position corresponding to the switch 32 mounted on the substrate 30, and is for the operator to operate the alarm device 1. In the present embodiment, the operation unit 17 is provided on the lower end side of the decorative panel 13 with reference to the time when the alarm device 1 is installed. Further, on the front side of the decorative panel 13, for example, a character “alarm stop” is written at a position corresponding to the operation unit 17.

  On the lower end side of the decorative panel 13, a space is formed between the decorative panel 13 and the front portion 12 a so that a certain gap is created, and the lower end side of the decorative panel 13 is a free end. In addition, the front portion 12a is supported in a cantilever shape. The operation unit 17 is positioned on the free end side of the decorative panel 13 and can be elastically deformed in the thickness direction of the decorative panel 13. By pressing the operation unit 17 from the front side of the upper case 12, the operation unit 17 is elastically deformed inwardly of the case body 10 (in the thickness direction of the decorative panel 13), thereby the switch 32 (specifically, The movable part of the switch 32 is pressed by the operation part 17.

  In the present embodiment, a movable member 12a1 in which a part of the front portion 12a is formed in a required shape is provided between the operation unit 17 and the switch 32. For this reason, when the operation part 17 is elastically deformed inward (pressing operation direction DR) of the case main body 10, the operation part 17 is brought into primary contact with the movable member 12a1, and the movable member 12a1 is interposed therebetween. Then, the switch 32 is pressed.

  The case body 10 further has a mounting plate 20. The attachment plate 20 is a member for attaching the case main body 10 (alarm device 1) to the wall surface, and is assembled to the back side of the back portion 11a forming the lower case 11. Openings 21 and 22 having a predetermined shape are formed in the upper portion of the mounting plate 20, and a hanging tool (not shown) is attached to the wall surface on which the alarm device 1 is installed. The case main body 10 including the mounting plate 20 is suspended by engaging the suspenders with the openings 21 and 22, whereby the alarm device 1 is attached to the wall surface. In the present embodiment, the openings 21 and 22 are formed in two different shapes from each other, and can be used in common for two types of hanging tools.

  Further, when the mounting plate 20 is assembled to the lower case 11, the mounting plate 20 is arranged in parallel with the rear surface portion 11a of the lower case 11 with a certain gap between the rear surface portion 11a. ing. This gap is for introducing the atmosphere around the alarm device 1 to the fire sensor 50 partially protruding from the back surface portion 11a of the lower case 11.

  The substrate 30 is a printed wiring board, and a plurality of electronic components are mounted by soldering or the like. The substrate 30 has a wiring pattern that is electrically connected to the mounted electronic component to form an electric circuit. The substrate 30 is arranged in a state of being parallel or substantially parallel to the back surface portion 11 a of the lower case 11.

  A fire sensor 50 and a CO sensor 60 are mounted on the back side of the substrate 30. On the other hand, on the front side of the substrate 30, a speaker 31, a switch 32, a plurality of LEDs 33, a microcomputer (not shown), and the like are mounted.

  The speaker 31 is controlled by the microcomputer and outputs an alarm from the fire sensor 50 and the CO sensor 60.

  The switch 32 outputs a predetermined signal to the microcomputer in response to a pressing operation of the operation unit 17 or a pulling operation of the pull string 40. The switch 32 includes, for example, a movable part, and outputs a predetermined signal to the microcomputer when the movable part is pressed.

  Note that the switch 32 is of a type that presses the movable part, but the switch may be of any other type as long as it can determine the pressing operation of the operation unit 17.

  The plurality of LEDs 33 are composed of four LEDs corresponding to one or more colors. These LEDs 33 are controlled by a microcomputer and output an alarm from the fire sensor 50 and the CO sensor 60 or output a warning state.

  The microcomputer controls the alarm device 1. For example, the microcomputer controls the LED 33 and the speaker based on detection signals output from the fire sensor 50 and the CO sensor 60 to give an alarm. Further, the microcomputer determines an operation input according to a signal input from the switch 32 or a signal change. When the microcomputer receives the operation input, the microcomputer stops the alarm output at the time of the alarm operation, or performs the inspection operation at the time of the non-alarm operation.

  The fire sensor 50 is a sensor that detects a fire based on smoke or temperature in the atmosphere around the alarm device 1. The fire sensor 50 is a well-known fire sensor such as a heat sensor or a smoke sensor, for example, and outputs a detection signal corresponding to the presence or absence of heat or smoke accompanying the fire to the microcomputer.

  The fire sensor 50 has a cylindrical shape that is wide in the radial direction. An opening is formed in the required portion of the back surface portion 11a of the lower case 11, and the fire sensor 50 is supported on the substrate 30 so that the sensor portion protrudes from the opening.

  The CO sensor 60 is, for example, an electrochemical CO sensor. The CO sensor 60 detects the concentration of carbon monoxide contained in the atmosphere entering the sensor chamber from the slit 14 and outputs a detection signal corresponding to the concentration to the microcomputer.

  The CO sensor 60 has a cylindrical shape that is elongated in the axial direction. The CO sensor 60 is supported on the substrate 30 in the case body 10 in a sideways state (a state parallel to the back surface portion 11a and the front surface portion 12a).

  In the present embodiment, the alarm device 1 has a pull string 40. Hereinafter, the attachment structure of the pull string 40 to the case body 10 and the specific structure of the pull string 40 will be described. Here, FIG. 3 is an enlarged cross-sectional view showing a main part of the alarm device 1 shown in FIG. In the same figure, (a) expands and shows the principal part of the alarm device 1 shown in FIG. 2, (b) has shown the state of the alarm device 1 before attaching the drawstring 40. FIG. FIG. 4 is an explanatory diagram showing the configuration of the pull string 40, and FIG. 5 is an explanatory diagram showing the configuration of the hook portion 41.

  First, the attachment structure of the pull string 40 to the case body 10 will be described. In the case body 10, a case claw portion 13 a is formed at the lower end portion on the back side of the decorative panel 13. That is, the case claw portion 13 a is provided on the back side of the case front portion including the front portion 12 a and the decorative panel 13 in a position corresponding to the operation portion 17. The case claw portion 13a is configured to extend along the plate thickness direction (pressing operation direction DR) of the decorative panel 13 on the back side of the decorative panel 13, and the claw 13a1 protruding upward is formed at the tip of the case claw portion 13a. Is formed

  A mounting hole 11a1 is formed in the lower end portion of the back surface portion 11a of the lower case 11. This is to insert the mounting hole 11a1 and the pull string 40 (a hook 41 described later) into the case body 10 along a direction parallel to the pressing operation direction DR. The inside of the case main body 10 is partitioned into a required shape, and the drawstring 40 (the hooking portion 41) inserted into the case main body 10 can be advanced and retracted along the pressing operation direction DR by the case main body 10. Retained.

  Next, the drawstring 40 will be described. This drawstring 40 is for an operator to operate the alarm device 1. The pull string 40 includes a hook portion 41 and a string member 42.

  The hook portion 41 is inserted to a predetermined position in the case main body 10 to engage with the case claw portion 13a, thereby attaching the pull string 40 to the case main body 10. Specifically, the hooking portion 41 includes a flat plate-like main body portion 41a, an engagement claw 41b that is provided at one end of the main body portion 41a, and engages with the claw 13a1 of the case claw portion 13a, and the main body portion. The hook 41c is provided at a position closer to the inner side from the other end of 41a and locks the string member 42. When inserted into the case main body 10, the engaging claws 41b protrude downward from the main body 41a, and the hook 41c protrudes downward from the main body 41a in a bowl shape.

  The string member 42 is formed in a loop shape by binding both ends thereof by a handle portion 42a. The loop-shaped string member 42 is locked to the hook 41 by being hooked on the hook 41 c of the hook 41. Naturally, the string member 42 can be removed from the hook 42c. In this way, the string member 42 is detachably connected to the hook portion 41. The string member 42 hangs down from the case body 10 in a state where the pull string 40 is attached to the case body 10.

  Hereinafter, a method for attaching the pull string 40 to the case body 10 will be described. The work of attaching the pull string 40 to the case body 10 is performed by an operator when the alarm device 1 is installed. Here, FIG. 6 is an explanatory view showing a process of attaching the pull string 40 to the case body 10.

  First, prior to attaching the pull string 40 to the case body 10, the pull string 40 is assembled. Specifically, the loop-shaped string member 42 is hooked on the hook 41 c of the hook portion 41, and the string member 42 is locked to the hook portion 41.

  Next, the drawstring 40 is attached to the case body 10. Specifically, the hooking portion 41 is disposed at a position facing the mounting hole 11a1 of the lower case 11. At this time, the hooking portion 41 is arranged with the engaging claws 41b and the hooks 41c facing downward. Then, the hook portion 41 is inserted from the mounting hole 11a1 and is made to enter the inside of the case body 10 until it reaches a predetermined position in the case body 10.

  In this case, when the engaging claw 41b of the hook portion 41 reaches the claw 13a1 (tip) of the case claw portion 13a, the main body portion 41a is elastically deformed upward so that the engaging claw 41b rides on the claw 13a1. . Next, when the engaging claw 41b gets over the claw 13a1, the elastically deformed main body 41a is deformed in a direction to restore the normal shape. And if the hook part 41 approachs to the predetermined position in the case main body 10, the main-body part 41a will be restored | restored to a normal shape, and will be in the state which the engagement nail | claw 41b and the nail | claw 13a1 mutually engaged.

  Thereby, the engagement between the case main body 10 and the hooking portion 41 is completed, and the attachment of the pull string 40 to the case main body 10 is completed. In this state, the hook 41c of the hook portion 41 is housed inside the case body 10, and only the rear end portion of the hook portion 41 is exposed from the mounting hole 11a1. A part of the string member 42 enters the case body 10, and the remaining part including the handle portion 42 hangs down from the case body 10.

  In the alarm device 1 having such a configuration, the alarm device 1 can be operated by pulling the pull string 40. First, the operator pulls the string member 42 of the pull string 40 along the hanging direction. Since the hook portion 41 is held in the case body 10 so as to be able to advance and retreat in a direction parallel to the pressing operation direction DR, when the string member 42 is pulled, the hook portion 41 presses the case body 10. Retreat to the back side along the direction DR. Then, the operating portion 17 is elastically deformed inward of the case main body 10 by pulling the case claw portion 13a while the hook portion 41 is retracted. When the operation unit 17 is elastically deformed, the operation unit 17 primarily comes into contact with the movable member 12a1 and presses the switch 32 via the movable member 12a1. As described above, the operation portion 17 is indirectly pressed by the pulling operation of the pull string 40, thereby pressing the switch 32 (specifically, the movable portion of the switch 32).

  As described above, in the present embodiment, the alarm device 1 includes the case-like case body 10, the switch 32 housed in the case body 10, and the pull string 40 that performs a pulling operation. Yes.

  In this case, the case main body 10 is provided on the decorative panel 13 that forms the front side of the case main body 10, and an operation unit (press operation unit) 17 that presses the switch 32 in response to a pressing operation, and the back surface of the decorative panel 13. It is formed in the case claw part 13a formed corresponding to the operation part 17 on the side and the lower case 11 (back face part 11a) that forms the back side of the case body 10, and the pull string 40 is pressed in the operation direction DR. And a mounting hole 11a1 for insertion into the case body 10 along a direction parallel to the case.

  The pull string 40 is connected to the hook portion 41 and the hook portion 41 engaged with the case claw portion 13a in a state of being inserted into the case main body 10 through the mounting hole 11a1 and suspended from the case main body 10. And a string member 42 to be used.

  The hooking portion 41 is a force that presses the switch 32 against the operation portion 17 by changing the drooping direction force acting on the string member 42 to a force in the pressing operation direction DR when the string member 42 is pulled. To communicate. That is, the hook portion 41 is held in the case body 10 so as to be able to advance and retreat along the pressing operation direction DR. When the string member 42 is pulled, the hook portion 41 is moved to the back side of the case body 10 along the pressing operation direction DR. The operation portion 17 is elastically deformed inward of the case body 10 by pulling the case claw portion 13a while retreating.

  According to this configuration, the pull string 40 can be attached to the case main body 10 by inserting the hook portion 41 into the case main body 10. Thereby, since the pull string 40 can be attached by one touch, the attachment work to the case main body 10 becomes easy, and the burden on the operator can be reduced.

  Further, the pressing operation direction DR of the operation unit 17 and the pulling operation direction of the pulling string 40 (the hanging direction of the string member 42) are orthogonal to each other, but the hanging direction that acts on the string member 42 by the hooking part 41. Can be changed to a force in the pressing operation direction DR. Thereby, since the pressing operation of the operation part 17 can be indirectly performed by the pull string 40, the operation by the pull string 40 can be reliably transmitted to the switch 32.

  In the present embodiment, the string member 42 is detachably connected to the hook portion 41. Specifically, the hook portion 41 includes a main body portion 41a made of a long rectangular plate, an engaging claw 41b that is provided at one end of the main body portion 41a and engages with the case claw portion 13a, and a main body. A hook 41c that is provided at a position closer to the inside from the other end of the portion 41a and that locks the string member 42.

  According to this structure, the hook part 41 and the string member 42 exist as separate parts. Therefore, for the string member 42, it is possible to divert the one assembled to the other alarm device 1, so in order to apply to the present alarm device 1, it is only necessary to newly manufacture the hook 41, Parts can be shared, and unnecessary costs can be suppressed.

  Further, the string member 42 can be connected to the hook 41 by hooking the string member 42 on the hook 41c. For this reason, since both can be connected by a simple operation | work, an operator can assemble the drawstring 40 easily.

  Further, the hook 41c is provided at a position close to the inside from the other end of the main body 41a. For this reason, when the hook portion 41 is assembled in the case main body 10, the string member 42 locked to the hook 41 c is pulled into the case main body 10. Thereby, since both locking positions are accommodated in the case body 10, it is possible to suppress a situation in which the string member 42 is easily detached from the hook 41c.

  Furthermore, since the locking position between the hook 41c and the string member 42 is located at the back of the case body 10, the length of the portion of the string member 42 parallel to the hooking portion 41 is ensured. Thereby, the hook part 41 can be smoothly moved along the pressing operation direction DR by pulling the string member 42. As a result, the operation by the drawstring 40 can be reliably transmitted to the switch 32.

  Moreover, in this embodiment, the case nail | claw part 13a protrudes along the press operation direction DR from the back side of the decorative panel 13, and is shorter than the length of the main-body part 41a of the hook part 41. Is set.

  The case claw portion 13 a is provided on the lower end portion side of the decorative panel 13, and the lower end portion side is configured to be elastically deformable in order to receive a pressing operation to the operation portion 17. For this reason, when the length of the case claw portion 13a is set large, the flexibility of the case claw portion 13a itself is combined with the elasticity of the case claw portion 13a itself to increase the degree of freedom of swinging at the tip portion of the case claw portion 13a. For this reason, the nail | claw 13a1 located in the front-end | tip of the case nail | claw part 13a becomes easy to remove | deviate from the engagement nail | claw 41b of the hook part 41, and the situation where the hook part 41 falls off from the mounting hole 11a1 may arise.

  In this regard, according to the present embodiment, the length in the length direction of the case claw portion 13a is reduced, so that the rigidity can be increased. Thereby, about the front-end | tip part of the case nail | claw part 13a, the rocking | fluctuation freedom degree can be suppressed. As a result, it is difficult for the claw 13a1 of the case claw portion 13a to come off from the engagement claw 41b of the hook portion 41, and the inconvenience that the hook portion 41 falls off from the mounting hole 11a1 can be suppressed.

  The alarm device according to this embodiment has been described above, but the present invention is not limited to this embodiment, and various modifications can be made within the scope of the invention. For example, in the above-described embodiment, an alarm device including a CO sensor and a fire sensor has been described. However, a gas sensor may be provided together with these sensors or instead of one or all of these sensors. That is, the alarm device only needs to include one or more sensors that detect a predetermined event.

  Further, the upper case does not need to be provided with a decorative plate, and the upper case itself may be provided with a pressing operation portion that can be elastically deformed in accordance with the pressing operation.

DESCRIPTION OF SYMBOLS 1 Alarm device 10 Case main body 11 Lower case 11a Back part 11a1 Mounting hole 11b Peripheral wall part 12 Upper case 12a Front part 12b Peripheral wall part 13 Cosmetic panel 13a Case claw part 13a1 Claw 17 Operation part (press operation part)
DESCRIPTION OF SYMBOLS 20 Mounting plate 21,22 Opening 30 Board | substrate 32 Switch 40 Pull string 41 Hook part 41a Main body part 41b Engagement claw 41c Hook 42 String member 42a Handle part 50 Fire sensor 60 CO sensor

Claims (5)

A case-like case body;
A switch housed in the case body;
A pull string for performing a pull operation,
The case body is
A pressing operation portion that is provided in a case front portion that forms the front side of the case body, and that presses the switch in response to a pressing operation;
A case claw portion formed on the back side of the case front portion in correspondence with the pressing operation portion,
A mounting hole for inserting the drawstring into the case body along a direction parallel to the pressing operation direction, formed on the case back surface portion forming the back side of the case body,
The drawstring is
A hook portion that engages with the case claw portion in a state of being inserted into the case body from the mounting hole,
A string member hanging from the case body while being connected to the hook portion;
The hook is
When the string member is pulled, the force in the hanging direction acting on the string member is changed to the force in the pressing operation direction, thereby transmitting the force for pressing the switch to the pressing operation unit. Alarm device characterized. The pressing operation portion is configured to be able to press the switch by elastically deforming inward of the case body in response to the pressing operation.
The hooking portion is held in the case main body so as to be able to advance and retreat along the pressing operation direction. 2. The alarm device according to claim 1, wherein the pressing operation portion is elastically deformed inward of the case main body by pulling the case claw portion.   The alarm device according to claim 1 or 2, wherein the string member is detachably connected to the hook portion. The hook is
A main body made of a rectangular flat plate;
An engaging claw that is provided at one end of the main body and engages the case claw;
A hook that is provided at a position closer to the inside from the other end of the main body, and that locks the string member;
The alarm device according to any one of claims 1 to 3, further comprising:   5. The case claw portion is formed so as to protrude from the back side of the front portion of the case along the pressing operation direction, and is set to a length shorter than the length of the main body portion. Alarm device described in.

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