JP7061988B2 - Gas leak alarm - Google Patents

Description

The present invention relates to a light emitting unit of a gas leak alarm.

As a conventional gas leak alarm, as shown in Patent Document 1 below, a cover member constituting the main body is provided with a light emitting member such as a light emitting diode that emits light when a gas leak or the like is detected to notify the user. What to prepare is generally known.

Japanese Unexamined Patent Publication No. 2008-287382 (see FIG. 1)

In the conventional gas leak alarm, a hole for passing light of the light emitting member is provided in the cover member, or there is a gap between the provided hole and the light emitting member, so that dust, water, etc. pass through this hole or gap. There is a risk that it will enter the inside and corrode the substrate or the like. Therefore, it is necessary to separately provide a structure for preventing dust, water, and the like from entering, which causes a problem that the number of parts increases and the manufacturing cost increases. Further, in order to allow the light of the light emitting member to pass through, it is conceivable that another transparent or translucent member is fitted in the portion of the cover member through which the light of the light emitting member is transmitted. Since it is necessary to use a fairly durable material in order to secure it, there is a problem that the manufacturing cost is high even in this configuration.
An object of the present invention is to provide a gas leak alarm that can confirm the light emitted by the light emitting member and can reduce the manufacturing cost.

In the first characteristic configuration according to the gas leak alarm of the present invention, the light emitting portion is integrally molded with the cover member, and the light emitting portion receives light from the light emitting member provided inside the cover member. The light emitting portion is configured to be capable of surface light emission, and the light emitting portion is defined as a portion thinner than the other portion of the cover member provided by retreating from at least one of the front surface side and the back surface side of the cover member. The point is that the light transmittance of the cover member is higher than that of other parts of the cover member.

In the second characteristic configuration, the light emitting portion is made of the same material as the cover member, and the light emitting portion is configured to receive light from the light emitting member provided inside the cover member and be capable of surface emission. The light emitting portion is defined as a portion thinner than the other portion of the cover member provided by retreating from at least one of the front surface side and the back surface side of the cover member, and the light transmittance of the light emitting portion is defined as the cover. The point is that it is configured to have a higher transmittance than the other parts of the member.

In the third characteristic configuration, a part of the cover member is configured as a light emitting portion, and the light emitting portion is configured to receive light from a light emitting member provided inside the cover member and be capable of surface emission. The light emitting portion is defined as a portion thinner than the other portion of the cover member provided by retreating from at least one of the front surface side and the back surface side of the cover member, and the light transmittance of the light emitting portion is defined as the cover member. The point is that it is configured to have a higher transmittance than the other parts.

[Action and effect]
According to any one of the first to third configurations of the present invention, the light emitting portion is configured such that the light emitting member is provided inside the cover member and receives light from the light emitting member to emit light on the surface. Therefore, the light emitted by the light emitting member can be confirmed. Furthermore, since it is not necessary to provide a hole for passing light of the light emitting member or a transparent or translucent member in the cover member, a structure for preventing dust, water, etc. from entering the inside may be separately provided, or the strength may be increased. It is not necessary to use expensive and expensive materials, the number of parts is small, and the manufacturing cost can be reduced. Further, according to any one of the first to third configurations of the present invention, since the light emitting portion is configured to have a higher light transmittance than the other parts of the cover member, the light emitted by the light emitting member is emitted. It becomes easier to pass through the light emitting portion, and it becomes easier to confirm the light emitted by the light emitting member.

The fourth characteristic configuration is that the light emitting portion is configured to be flat on the surface side of the cover member.

[Action and effect]
According to the fourth characteristic configuration, since there is no step on the surface side of the light emitting portion, dust and the like are hard to collect and dirt is hard to be attached, so that it is hard to be shielded from light and it is easy to maintain a better light emitting state.

In the fifth characteristic configuration, the light emitting portion is configured flat on the back surface side of the cover member.

[Action and effect]
According to the fifth feature configuration, since the light emitting portion is formed thinner than the other parts of the cover member and is formed flat on the back surface side of the cover member, the cover is formed on the front surface side of the cover member of the light emitting portion. It retires in two stages: retirement from other parts of the member and retirement from the peripheral part of the light emitting part. As a result, the impact from the outside is less likely to be transmitted to the light emitting portion, so that it is easy to prevent the light emitting portion from being damaged.

The sixth characteristic configuration is that the light emitting portion includes a bottom surface and an inclined surface connected to the outer periphery of the bottom surface.

[Action and effect]
According to the sixth configuration, it is possible to obtain a visually gentle light emitting form.

The seventh characteristic configuration is that the light emitting portion is configured so as to be gradually thinned on the inclined surface and thinned on the bottom surface.

[Action and effect]
According to the seventh feature configuration, it is possible to obtain a visually gentler light emitting form.

It is a perspective view which shows the 1st Embodiment of the gas leak alarm of this invention. It is an exploded perspective view of the gas leak alarm shown in FIG. 1. It is a top view which concerns on 1st Embodiment. It is an exploded perspective view which showed the state of fitting a button member into the upper cover which concerns on 1st Embodiment partially enlarged. It is a vertical sectional view before the pressing operation in the arrow line VV of FIG. 3 when the button member is fitted in the upper cover. It is a vertical sectional view after the pressing operation in the arrow line VI-VI of FIG. 3 when the button member is fitted in the upper cover. FIG. 5 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 3 is an exploded perspective view showing a partially enlarged view of fitting the upper cover to the lower cover on which the substrate according to the first embodiment is arranged. It is a vertical sectional view of the gas leak alarm in the arrow line IX-IX of FIG. It is a perspective view which shows the 2nd Embodiment of the gas leak alarm of this invention. It is an exploded perspective view of the gas leak alarm shown in FIG. It is a top view which concerns on 2nd Embodiment. It is an exploded perspective view which showed the state of fitting a button member into the upper cover which concerns on 2nd Embodiment partially enlarged. It is a vertical cross-sectional view before the pressing operation in the arrow line XIV-XIV of FIG. 12 when the button member is fitted in the upper cover. It is a vertical cross-sectional view after the pressing operation in the arrow line XV-XV of FIG. 12 when the button member is fitted in the upper cover. 14 is a cross-sectional view taken along the line of arrow XVI-XVI of FIG. FIG. 3 is an exploded perspective view showing a partially enlarged view of fitting the upper cover to the lower cover on which the substrate according to the second embodiment is arranged. It is a vertical sectional view of the gas leak alarm in the arrow line XVIII-XVIII of FIG.

Hereinafter, embodiments of the gas leak alarm of the present invention will be described with reference to the drawings. In the present specification, each of the "width direction", "longitudinal direction", and "thickness direction" means the direction along the arrows X1, X2, and X3 in FIG.

[First Embodiment]
As shown in FIGS. 1 and 2, the gas leak alarm 1 of the present embodiment has a button member 2 on which a pressing operation is performed by a user, a support member 10 for supporting the button member 2, and switching on / off of an alarm operation. A switch member 15, a light emitting member 16 as an alarm lamp, a substrate 31 provided with a control circuit (not shown), a gas sensor 32 for detecting a gas leak, an alarm buzzer 33 for emitting an alarm sound, and a power source for operating a gas leak alarm 1. The 34 and the cover member 17 and the like constituting the appearance of the gas leak alarm 1 are provided.

(Button member)
As shown in FIGS. 2 and 4, the button member 2 is configured to be fitable into the recess 19 formed in the upper cover 18 of the cover member 17. The button member 2 is a rectangular parallelepiped box-shaped housing, and is made of synthetic resin or the like. The button member 2 has a rectangular pressing portion 3 in a plan view in which the pressing operation is performed, a long side wall portion 4 erected from each of the two long sides of the pressing portion 3, and two short sides of the pressing portion 3, respectively. The short side wall portion 7 erected from the above, the locking claw portion 5 erected inside each of the two short side wall portions 7, and the cylindrical fitted portion erected substantially in the center of the back surface of the pressing portion 3. 6 and. Two notched grooves 9 (groove portions) are formed in one of the two long side wall portions 4 of the button member 2. Further, the short side wall portion 7 of the button member 2 is formed with a notch portion 8 having a vertical cross section of the short side wall portion 7 in a U shape, and the locking claw portion 5 is inside the notch portion 8. Arranged adjacent to.

(Cover member)
As shown in FIGS. 1 and 2, the cover member 17 includes an upper cover 18 arranged on the front side of the gas leak alarm 1 and a lower cover 30 arranged on the back side. The upper cover 18 and the lower cover 30 are both rectangular parallelepiped box-shaped housings, and may be made of a commonly used synthetic resin such as ABS resin or polycarbonate / ABS, but the synthetic resin used is , It is desirable that it is flame-retardant. Further, the surface of the upper cover 18 or the respective surfaces of the upper cover 18 and the lower cover 30 may be subjected to so-called "texturing" to form fine irregularities.

Inclined portions 21 are formed on the upper surface of the upper cover 18 at substantially the center of the width direction X1 and at both ends of the longitudinal direction X2 so as to retreat deeper toward the end side of the longitudinal direction X2. A plurality of slits 22 for emitting the buzzer sound of the alarm buzzer 33 are formed in one inclined portion 21, and a light emitting portion 23 is provided in the other inclined portion 21.

As shown in FIG. 2, a concave portion 19 which is a rectangular parallelepiped recess is formed on the upper surface of the upper cover 18 on the end side in the width direction X1 and at a substantially central portion in the longitudinal direction X2. The button member 2 is fitted.

As shown in FIGS. 3 to 7, an opening 19c is formed in each of the two short side portions of the bottom surface 19a of the recess 19. Further, a locked portion 13 to which the locking claw portion 5 of the button member 2 can be locked is formed on the side wall standing from each of the two short sides of the bottom surface 19a of the concave portion 19. The locked portion 13 has a rounded curved surface 13a and is provided so as to project inside the recess 19. Further, the locked portion 13 is arranged above the opening 19c.

On the side wall of the recess 19 where the locked portion 13 is formed, two vertical ribs 20A and 20B along the thickness direction are provided on both sides of the locked portion 13 in the width direction. As shown in FIGS. 4 and 7, when the button member 2 is fitted into the recess 19, the locking claw portion 5 of the button member 2 is fitted between the two vertical ribs 20A and 20B, and at the same time, the two vertical ribs 20A and 20B are fitted. The ribs 20A and 20B are configured to be fitted into the notch 8 of the button member 2.

Of the two long sides of the bottom surface 19a of the recess 19, two positioning ribs 26 are provided on the side wall erected from the long side arranged inside the width direction X1 of the upper cover 18. When the button member 2 is fitted into the recess 19, each of the two positioning ribs 26 of the recess 19 is fitted into each of the two notch grooves 9 of the button member 2. As a result, the fitting direction of the button member 2 in the front-rear direction (longitudinal direction X2) is defined, so that the button member 2 is prevented from being reversed in the front-rear direction (longitudinal direction X2).

(Support member)
As shown in FIGS. 3 to 7, the support member 10 includes a columnar body 11 and a spring portion 12 provided on a side surface of a substantially central portion of the columnar body 11 in the axial direction, and is made of a synthetic resin or the like. There is.

One end of the cylindrical body 11 is fitted into the fitted recess 6a of the fitted portion 6 of the button member 2, and the switch member 15 is pressed on the other end by the user. A contact portion 11a that comes into contact with the contact portion 11a is provided.

The spring portion 12 includes two connecting portions 12a and 12b having a semicircular shape in a plan view. The two connecting portions 12a and 12b are arranged so as to face each other on the side surface of the substantially central portion in the axial direction of the cylindrical body 11 so as to wrap around the cylindrical body 11, and the spring portion 12 as a whole is viewed in a plan view. Form an S-shaped shape.

The support member 10 is arranged in the recess 19 of the upper cover 18. Each of the two connecting portions 12a and 12b of the spring portion 12 is connected to a position facing each other in a plan view in a circular through hole 19b formed in the bottom surface 19a of the recess 19. As a result, the support member 10 is supported by the upper cover 18 on both sides, and the two connecting portions 12a and 12b of the spring portion 12 bend in the thickness direction (pressing direction of the button member 2 and vice versa) X3 of the upper cover 18. Then, the support member 10 can move in the X3 direction.
The support member 10 and the spring portion 12 in this embodiment are integrally molded with the upper cover 18.

(Switch member, light emitting member, alarm buzzer, gas sensor, power supply, board, etc.)
The switch member 15, the light emitting member 16, the alarm buzzer 33, the gas sensor 32, the power supply 34, the board 31, etc., and other parts used in the gas leak alarm 1 of the present embodiment are usually used in the alarm device and the like. Known parts may be used. For example, as the switch member 15, a tact switch or the like can be used. As the light emitting member 16, a bullet-shaped light emitting diode or the like can be used. As the gas sensor 32, a semiconductor type sensor, a contact combustion type sensor, or the like can be used. The switch member 15, the light emitting member 16, the alarm buzzer 33, the gas sensor 32, and the power supply 34 are each arranged at predetermined positions on the substrate 31.

(Detected gas)
Examples of the gas to be detected include, but are not limited to, city gas and propane gas.

(Assembly work)
Each of the two locking claws 5 of the button member 2 is placed between the two vertical ribs 20A and 20B of the side wall of the recess 19 so that the notch groove 9 of the button member 2 is fitted into the rib 26 of the recess 19. When the pressing portion 3 of the button member 2 is pushed so as to be arranged (see FIG. 4) and inserted into the opening 19c of the bottom surface 19a of the recess 19, the locking claw portion 5 becomes the two vertical ribs 20A and 20B. The two vertical ribs 20A and 20B are fitted into the notch 8 of the button member 2 while moving between them.

Then, the rounded bottom surface 5b of the locking claw portion 5 of the button member 2 abuts on the curved surface 13a of the locked portion 13 so that the locking claw portion 5 is pushed inside the button member 2. While elastically deforming, the button member 2 is fitted into the recess 19, the claw portion 5a of the locking claw portion 5 reaches the lower side of the locked portion 13, and the bottom surface 5b of the locking claw portion 5 And the curved surface 13a of the locked portion 13 do not come into contact with each other, and at the same time, the claw portion 5a of the locking claw portion 5 elastically returns to the outside and is locked to the bottom surface 13b of the locked portion 13 (see FIG. 5). ..

At this time, as shown in FIG. 5, one end side of the cylindrical body 11 of the support member 10 is fitted into the fitted recess 6a of the button member 2, and the claw portion 5a of the locking claw portion 5 of the button member 2 is fitted. Is urged by an elastic force in the direction opposite to the pressing direction from the connecting portions 12a and 12b of the support member 10, and is locked to the bottom surface 13b of the locked portion 13 of the recess 19. As a result, the button member 2 is fitted into the recess 19 of the upper cover 18 in a state of being prevented from coming off.

As shown in FIG. 2, the substrate 31 including the switch member 15, the light emitting member 16, and the like is arranged at a predetermined position in the lower cover 30 in a predetermined direction, and the upper cover 18 is further overlapped with the substrate 31. The upper cover 18 and the lower cover 30 are fitted to each other, and the gas leak alarm 1 is assembled (see FIG. 1).

At this time, inside the gas leak alarm 1, the switch member 15 is arranged just below the columnar body 11 of the support member 10 of the upper cover 18 (see FIG. 5), and the partition wall provided on the upper cover 18 is provided. The light emitting member 16 is arranged inside the 24 (see FIGS. 8 and 9).

(Switch structure)
The switch structure in the gas leak alarm 1 of the present embodiment includes a button member 2 on which a pressing operation is performed, a support member 10 for supporting the button member 2, an upper cover 18 provided with the support member 10, and a switch member 15. And prepare.

The button member 2 is attached so as to be movable in the X3 direction during a pressing operation in the recess 19 formed in the upper cover 18.

As shown in FIG. 5, in a state where the user does not press the button member 2, the button member 2 receives an elastic force in the direction opposite to the pressing direction from the connecting portions 12a and 12b of the support member 10. By being pushed, the claw portion 5a of the locking claw portion 5 of the button member 2 is maintained in a state of being locked to the bottom surface 13b of the locked portion 13, whereby the cylindrical body 11 of the support member 10 comes into contact with the claw portion 11. The portion 11a and the switch member 15 are separated from each other.

On the other hand, as shown in FIG. 6, when the user pushes the pressing portion 3 of the button member 2 against the elastic force from the connecting portions 12a and 12b of the supporting member 10, the cylindrical body 11 of the supporting member 10 presses the button. It is pushed by the fitting protrusion 6 of the member 2. Due to the pressing force, the connecting portions 12a and 12b of the support member 10 bend in the same direction as the pressing direction of the button member 2, the cylindrical body 11 moves, and the contact portion 11a of the cylindrical body 11 and the switch member 15 come into contact with each other. , This turns the switch on and off.

When the user stops the pressing operation of the button member 2, the button member 2 quickly moves in the direction opposite to the pressing direction due to the elastic force from the connecting portions 12a and 12b of the support member 10, and returns to the original position. That is, as shown in FIG. 5, the locking claw portion 5 of the button member 2 is relocked to the locked portion 13 of the recess 19, and the contact portion 11a of the cylindrical body 11 and the switch member 15 are separated from each other. Will be.

In the present embodiment, when the button member 2 moves in the pressing direction and the opposite direction, the inner side surface 8a of the notch portion 8 of the button member 2 is the outer surface of the two vertical ribs 20A and 20B of the recess 19. It will always be guided by 20a and 20b (see FIG. 7). That is, the two vertical ribs 20A and 20B function as guide members for guiding the movement of the button member 2 in the thickness direction X3, whereby the posture of the button member 2 is maintained, so that the posture of the button member 2 is maintained. Is prevented from collapsing and getting caught on the inner wall surface of the recess 19, and a smoother switch operation is performed.

Further, in a state where the user does not press the button member 2, that is, in a state where the contact portion 11a of the cylindrical body 11 of the support member 10 and the switch member 15 are separated from each other (see FIG. 5), the recess 19 is formed. The upper ends of the two positioning ribs 26 and the innermost portions 9a of the two notched grooves 9 of the button member 2 are held in a state of being separated from each other. When the user pushes the pressing portion 3 of the button member 2 and the contact portion 11a of the cylindrical body 11 and the switch member 15 come into contact with each other (see FIG. 6), the upper ends of the two positioning ribs 26 of the recess 19 and the button member 2 It is configured so that the innermost portion 9a (contact portion) of the two notch grooves 9 comes close to each other. Then, when the user tries to further push the button member 2, the upper end of the positioning rib 26 and the innermost portion 9a of the notch groove 9 come into contact with each other, so that the movement of the button member 2 is restricted and the switch member is restricted. It is possible to prevent an extra load from being applied to 15.

(Light emitting part)
The light emitting unit 23 in the gas leak alarm 1 of the present embodiment receives light from a light emitting member 16 (for example, a bullet-shaped light emitting diode or the like) provided inside the gas leak alarm 1 and emits surface light. It is configured.

As shown in FIG. 9, the light emitting portion 23 has a flat surface on the front surface side of the inclined portion 21, and is formed thinner on the back surface side of the inclined portion 21 than the other portions of the upper cover 18. A bottom surface 23a and an inclined surface 23b that gently rises from the bottom surface 23a are formed. The light emitting portion 23 gradually becomes thinner on the inclined surface 23b and becomes the thinnest on the bottom surface 23a. Each of the bottom surface 23a and the inclined surface 23b of the light emitting unit 23 is designed to have a thickness such that the light from the light emitting member 16 arranged on the back side of the light emitting unit 23 is transmitted and the surface emits light. According to such a configuration, when a part of the inclined portion 21 emits surface light as the light emitting portion 23, the boundary of the light emitting portion in the inclined portion 21 becomes ambiguous, so that a visually gentle light emitting form can be obtained. Further, since there is no step on the surface side of the inclined portion 21, dust and the like are hard to collect and dirt is hard to be attached, so that it is hard to be shielded from light and a better light emitting state is maintained.

As shown in FIGS. 8 and 9, a partition wall 24 is erected on the back surface portion of the upper cover 18 where the light emitting portion 23 is located so as to surround the bottom surface 23a and the inclined surface 23b. The back surface portion is partitioned from the other portion of the back surface so as to be surrounded by the partition wall 24. According to this configuration, even if a fire breaks out, the back surface portion of the upper cover 18 on which the light emitting portion 23 is located is partitioned from the other portions on the back surface by the partition wall 24, so that the heat generated by the fire is partitioned. Since it is preferentially transmitted to the wall 24 and is difficult to be transmitted to the light emitting portion 23 formed of a thin wall, it is possible to prevent the light emitting portion 23 from melting down due to heat. Further, the partition wall 24 can receive an external impact that can be applied to the light emitting unit 23, and the impact is less likely to be transmitted to the light emitting unit 23. Therefore, the light emitting unit 23, particularly the bottom surface 23a, is prevented from being damaged. Can be done.

A plurality of reinforcing ribs 25 along the thickness direction are provided on the inner wall surface of the partition wall 24. As shown in FIG. 9, these reinforcing ribs 25 are erected on the back surface portion of the upper cover 18 where the inclined surface 23b of the light emitting portion 23 is located to reinforce the partition wall 24 and in addition to the light emitting portion 23. It is also possible to receive a possible external impact. As a result, the impact from the outside is more difficult to be transmitted to the light emitting unit 23, so that damage to the light emitting unit 23, particularly the bottom surface 23a, can be prevented more reliably.

When the gas leak alarm 1 of the present embodiment is attached to a wall surface or the like with the width direction X1 in the vertical direction, the side wall 21a of the inclined portion 21 has a function as an eave. That is, since a shadow is formed by the side wall 21a and the vicinity of the light emitting unit 23 becomes dark, even when the user installs the gas leak alarm 1 of the present embodiment in a relatively bright place, the light emitting state of the light emitting unit 23 is confirmed. It will be easier. In particular, when the detected gas is propane gas heavier than air, the gas leak alarm 1 is installed on the lower side near the floor on a wall or the like, so that the light emitting unit 23 emits light when placed in a relatively dim environment. The state will be easier to check.

The light emitting unit 23 in the present embodiment is configured to be thinner than the other portions, but is not particularly limited to this configuration as long as the light emitting unit 23 has a configuration capable of surface emission. That is, it is not always necessary to configure the light emitting unit 23 to be thin, and the entire light emitting unit 23 may not be configured to be thin, but only a part thereof may be configured to be thin. However, it is desirable that the light emitting unit 23 has a light transmittance of 3% or more. The light transmittance of the light emitting unit 23 can be adjusted by appropriately changing the thickness of the light emitting unit 23, the type of the constituent material, the amount of titanium oxide contained in the constituent material, and the like, and the cover is not the entire cover member 17. At least the light emitting portion 23 of the member 17 may be configured to have a light transmittance of 3% or more.

Further, when the light emitting unit 23 is "textured", the light from the light emitting member 16 is diffusely reflected by the fine irregularities due to the grain processing and diffused, so that the light emitting state of the light emitting unit 23 is further confirmed. It will be easier. Regarding "texturing", not only the entire cover member 17, but at least the light emitting portion 23 of the cover member 17 may be configured to be "textured".

[Second Embodiment]
Next, the second embodiment will be described, but in order to avoid duplicate explanations, the components described in the first embodiment and the components having the same operation are omitted by giving the same reference numerals. Only the different configurations will be described.

As shown in FIGS. 10 to 12 and 18, in the present embodiment, a plurality of acoustic holes 22 are formed in one inclined portion 21 in place of the slit 22 in the first embodiment, and the other inclined portion 21 is formed. Unlike the case of the first embodiment, the light emitting unit 23 formed in the 21 includes a substantially trapezoidal bottom surface 23a in a plan view and an inclined surface 23b gently rising from its four sides, and the light emitting unit 23 as a whole is substantially in a plan view. It forms a trapezoid. The bottom surface 23a and the inclined surface 23b of the light emitting portion 23 in the present embodiment are configured to be thinner than the other portions of the upper cover 18. That is, the light emitting portion 23 gradually becomes thinner on the inclined surface 23b and becomes the thinnest on the bottom surface 23a. Each of the bottom surface 23a and the inclined surface 23b of the light emitting unit 23 is designed to have a thickness such that the light from the light emitting member 16 arranged on the back side of the light emitting unit 23 is transmitted and the surface emits light. Also in this embodiment, as shown in FIGS. 17 and 18, a partition wall 24 is erected on the back surface portion of the upper cover 18 where the light emitting portion 23 is located, and the back surface portion of the light emitting portion 23 is on the partition wall 24. It is surrounded by other parts of the back surface.

The light emitting portion 23 retires from other parts of the upper surface of the upper cover 18 by the inclined portion 21, and retires from other parts of the inclined portion 21 by the bottom surface 23a and the inclined surface 23b. It becomes difficult to directly hit the light emitting unit 23. As a result, the impact from the outside is more difficult to be transmitted to the light emitting unit 23, so that it is possible to prevent the light emitting unit 23, particularly the bottom surface 23a, from being damaged.

In this embodiment as well, the light emitting unit 23 does not necessarily have to be thin-walled, and the light-emitting unit 23 may not be entirely thin-walled, but only a part thereof may be thin-walled. However, it is desirable that the light emitting unit 23 has a light transmittance of 3% or more, and the light transmittance of the light emitting unit 23 includes the thickness of the light emitting unit 23, the type of the constituent material, the amount of titanium oxide contained in the constituent material, and the like. The above-mentioned first embodiment is the same as the above-mentioned first embodiment in that the above-mentioned can be appropriately changed and adjusted, and the grain processing may be performed.

As shown in FIGS. 11 to 13, in the present embodiment, the button member 2 is not provided with the notch groove 9 in the long side wall portion 4 in the first embodiment, and the notch groove 9 is also provided on the side of the recess 19. The positioning rib 26 corresponding to the above is not provided.

Further, as shown in FIGS. 13 to 16, the button member 2 is provided with a columnar fitting projection 6 at substantially the center of the back surface of the pressing portion 3, and the fitted recess 11b provided in the support member 10. It is configured to fit inside.

[Other embodiments]
(1) The cylindrical body 11 in the above-mentioned support member 10 may be configured to include an accommodating portion capable of accommodating a light emitting member such as a light emitting diode. According to this configuration, the button member 2 can be configured to emit light by the light from the light emitting member, so that the user can easily confirm the position of the button member 2 even in the dark.
(2) In the above-described embodiment, the contact portion 11a of the cylindrical body 11 of the support member 10 and the switch member 15 are in contact with each other, whereby the switch is turned on and off, but the configuration is limited to this configuration. It's not something. As another configuration, for example, a tact switch or the like may be adopted as the switch member 15, and the contact portion 11a of the support member may be slightly submerged in the switch member 15 to perform an on / off operation. It is not necessary that the contact portion 11a and the switch member 15 are always kept apart from each other.

The present invention can be applied to, for example, a fire alarm as well as a gas leak alarm.

1 Gas leak alarm 2 Button member 3 Pressing part 4 Long side wall part 5 Locking claw part 5a Claw part 5b Bottom surface 6 Fitting part 6a Fitted recess 7 Short side wall part 8 Notch part 8a Inner side surface 9 Notch groove ( Groove)
9a Inner part (contact part)
10 Support member 11 Cylindrical body 11a Contact part 11b Fitted recess 12 Spring part 12a, 12b Connecting part 13 Locked part 13a Curved surface 13b Bottom surface 15 Switch member 16 Light emitting member 17 Cover member 18 Top cover 19 Recession 19a Bottom surface 19b Circular penetration Hole 19c Opening 20A, 20B Vertical rib 20a, 20b Outer side surface 21 Inclined part 21a Side wall (eaves)
22 Acoustic hole 23 Light emitting part 23a Bottom surface 23b Inclined surface 24 Partition wall 25 Reinforcing rib 26 Positioning rib 30 Lower cover 31 Board 32 Gas sensor 33 Alarm buzzer 34 Power supply

Claims (7)

The light emitting portion is integrally molded with the cover member, and the light emitting portion is configured to receive light from the light emitting member provided inside the cover member and be capable of surface emission.
The light emitting portion is defined as a portion thinner than the other portion of the cover member provided by retreating from at least one of the front surface side and the back surface side of the cover member.
A gas leak alarm configured so that the light transmittance of the light emitting portion is higher than the transmittance of other portions of the cover member. The light emitting portion is made of the same material as the cover member, and the light emitting portion is configured to receive light from a light emitting member provided inside the cover member and be capable of surface emission.
The light emitting portion is defined as a portion thinner than the other portion of the cover member provided by retreating from at least one of the front surface side and the back surface side of the cover member.
A gas leak alarm configured so that the light transmittance of the light emitting portion is higher than the transmittance of other portions of the cover member. A part of the cover member is configured as a light emitting portion, and the light emitting portion is configured to be capable of surface emission by receiving light from a light emitting member provided inside the cover member.
The light emitting portion is defined as a portion thinner than the other portion of the cover member provided by retreating from at least one of the front surface side and the back surface side of the cover member.
A gas leak alarm configured so that the light transmittance of the light emitting portion is higher than the transmittance of other portions of the cover member. The gas leak alarm according to any one of claims 1 to 3, wherein the light emitting portion is formed flat on the surface side of the cover member. The gas leak alarm according to any one of claims 1 to 3, wherein the light emitting portion is formed flat on the back surface side of the cover member. The gas leak alarm according to any one of claims 1 to 5, wherein the light emitting portion includes a bottom surface and an inclined surface connected to the outer periphery of the bottom surface. The gas leak alarm according to claim 6, wherein the light emitting portion is configured to be gradually thinned on the inclined surface and thinned on the bottom surface.

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