JP6775486B2 - 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. can pass through this hole or the 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 able to emit light from the surface, the light emitting portion is formed to be thinner than the other parts of the cover member, the front surface side of the cover member is a flat surface, and the back surface side of the cover member is. A bottom surface and an inclined surface connected to the outer periphery of the bottom surface are provided , and the inclined surface gradually becomes thinner as it approaches the bottom surface, becomes the thinnest on the bottom surface, and the light transmittance of the light emitting portion on the bottom surface is increased. lies in that is configured to be higher than the transmittance of the other portions 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 formed to be thinner than other parts of the cover member, has a flat surface on the front surface side of the cover member, and has a bottom surface and an outer circumference of the bottom surface on the back surface side of the cover member. The sloped surface is gradually thinned as it approaches the bottom surface, becomes the thinnest on the bottom surface, and the light transmittance of the light emitting portion on the bottom surface is the other portion of the cover member. lies in that is configured to be higher than the transmittance.

The third characteristic configuration is that 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 formed to be thinner than the other parts of the cover member, and has a flat surface on the front surface side of the cover member, and on the back surface side of the cover member, on the bottom surface and the outer periphery of the bottom surface. It is provided with an inclined surface to be continuously provided , and gradually becomes thinner as it approaches the bottom surface on the inclined surface, becomes the thinnest on the bottom surface, and the light transmittance of the light emitting portion on the bottom surface is the other portion of the cover member. lies in that is configured to be higher than the transmittance.

[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 the light from the light emitting member to emit light on the surface. Therefore, the light emitted by the light emitting member can be confirmed. Further, since it is not necessary to provide a hole for passing light of the light emitting member or a transparent or semi-transparent 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, a visually gentle light emitting form can be obtained. 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 photoexistence rate than other parts of the cover member, the light emitted by the light emitting member is emitted. Is easier to pass through the light emitting part, and it is easier to check the light emitted by the light emitting member.

The fourth characteristic configuration is that the bottom surface and the inclined surface of the light emitting portion are provided on the back surface side of the cover member. The fifth characteristic configuration, the light emitting section, enclose takes the bottom surface and the inclined surface of the light emitting portion, further comprising in the erected a partition wall to partition the back side portion of the light emitting portion and the other portion There is a point.
[Action and effect]
According to the fourth characteristic configuration, since there is no step on the surface side of the inclined portion, dust and the like are less likely to accumulate and dirt is less likely to be attached, so that it is difficult to block light and a better light emitting state is easily maintained. According to the fifth characteristic configuration, even if a fire breaks out, the part where the light emitting part is located is partitioned by the partition wall, so that the heat generated by the fire is preferentially transmitted to the partition wall and formed thin. Since it is difficult to transmit to the light emitting part, it is possible to prevent the light emitting part from melting down due to heat. Further, the partition wall can receive an external impact that can be applied to the light emitting portion, and the impact is less likely to be transmitted to the light emitting portion, so that damage to the light emitting portion, particularly the bottom surface can be prevented.

The seventh characteristic configuration is that the amount of titanium oxide contained in the constituent material of the light emitting portion is smaller than the amount of titanium oxide contained in the constituent material of the other portion of the cover member.

[Action and effect]
According to this configuration, 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 easily passes through the light emitting portion, and the light emitting member emits light. It becomes easier to check the light.

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. It is a top view of the upper cover 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 by partially enlarging. It is a vertical cross-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 cross-sectional view after the pressing operation in the arrow line-of-sight VI-VI of FIG. 3 when the button member is fitted in the upper cover. It is a cross-sectional view of the arrow line VII-VII of FIG. FIG. 5 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 of the upper cover 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 by partially enlarging. It is a vertical cross-sectional view before the pressing operation in the arrow line XIV-XIVV 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. It is a cross-sectional view of the arrow line XVI-XVI of FIG. FIG. 5 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 a 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 user presses an operation, a support member 10 that supports 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 the gas leak alarm 1. 34, and a cover member 17 and the like that constitute the appearance of the gas leak alarm 1.

(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. A short side wall portion 7 erected from the above, a locking claw portion 5 erected inside each of the two short side wall portions 7, and a 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 such that the vertical cross section of the short side wall portion 7 has 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 known 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 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 rectangular parallelepiped recess 19 is formed on the upper surface of the upper cover 18 on the end side in the width direction X1 and substantially in the center of the longitudinal direction X2, with respect to the recess 19. 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 erected from each of the two short sides of the bottom surface 19a of the recess 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, two vertical ribs 20A and 20B. 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 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 that are semicircular in a plan view. The two connecting portions 12a and 12b are arranged to face the side surfaces of the substantially central portion of the cylindrical body 11 in the axial direction, and are provided so as to wrap around the cylindrical body 11, and the spring portion 12 as a whole is viewed in a plan view. It forms 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 substrate 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 can 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 on the side wall of the recess 19 so that the notch groove 9 of the button portion 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 is formed by the two vertical ribs 20A and 20B. As it moves between them, the two vertical ribs 20A and 20B are fitted into the notch 8 of the button member 2.

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 At the same time that the curved surface 13a of the locked portion 13 does not come into contact with each other, 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 receiving 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.

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 contact of the columnar body 11 of the support member 10 is maintained. 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 projection 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 by 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 locked again 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. It becomes.

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 in which 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 notch 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 portions 9a (contact portions) of the two notch grooves 9 come close to each other. Then, when the user tries to push the button member 2 further, 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 light from the light emitting member 16 arranged on the back side of the light emitting unit 23 is transmitted and surface-emitted. 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 portion 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 being melted down by 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 the light emitting unit 23, particularly the bottom surface 23a, can be prevented from being damaged 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 eaves. That is, since a shadow is formed by the side wall 21a and the vicinity of the light emitting unit 23 becomes dark, the light emitting state of the light emitting unit 23 is confirmed even when the user installs the gas leak alarm 1 of the present embodiment in a relatively bright place. It will be easier. In particular, when the gas to be detected 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 becomes easier to confirm.

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 make the light emitting unit 23 thin, and the light emitting unit 23 may not be made entirely thin, but only a part thereof may be made 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 textured processing to diffuse the light, so that the light emitting state of the light emitting unit 23 can be further confirmed. It will be easier. Regarding the "texturing", the "texturing" may be performed not only on the entire cover member 17 but only on at least the light emitting portion 23 of the cover member 17.

[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 instead 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 portion 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 portion 23 as a whole is substantially 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 formed 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 light from the light emitting member 16 arranged on the back side of the light emitting unit 23 is transmitted and surface-emitted. Also in the present 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 separated from the other parts of the back so that it is surrounded.

Since 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, foreign matter is released. 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 the light emitting unit 23, particularly the bottom surface 23a, can be prevented 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 in that the above-mentioned one can be appropriately changed and adjusted, and that the texture 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 protrusion 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 columnar body 11 in the above-mentioned support member 10 may be configured to include a housing 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 / 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 portion 21a Side wall 21a (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 (6)

The light emitting portion is integrally molded with 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 unit
It is made thinner than the other parts of the cover member.
The surface side of the cover member is a flat surface.
The back surface side of the cover member is provided with a bottom surface and an inclined surface connected to the outer periphery of the bottom surface .
The wall gradually becomes thinner as it approaches the bottom surface on the inclined surface, and becomes the thinnest on the bottom surface.
The light transmittance of the light emitting portion on the bottom surface is higher than the transmittance of other portions of the cover member.
Gas leak alarm that is configured. 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 unit
It is made thinner than the other parts of the cover member.
The surface side of the cover member is a flat surface.
The back surface side of the cover member is provided with a bottom surface and an inclined surface connected to the outer periphery of the bottom surface .
The wall gradually becomes thinner as it approaches the bottom surface on the inclined surface, and becomes the thinnest on the bottom surface.
The light transmittance of the light emitting portion on the bottom surface is higher than the transmittance of other portions of the cover member.
Gas leak alarm that is configured. 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 so that surface light can be emitted.
The light emitting unit
It is made thinner than the other parts of the cover member.
The surface side of the cover member is a flat surface.
The back surface side of the cover member is provided with a bottom surface and an inclined surface connected to the outer periphery of the bottom surface .
The wall gradually becomes thinner as it approaches the bottom surface on the inclined surface, and becomes the thinnest on the bottom surface.
The light transmittance of the light emitting portion on the bottom surface is higher than the transmittance of other portions of the cover member.
Gas leak alarm that is configured. The gas leak alarm according to any one of claims 1 to 3, wherein the bottom surface and the inclined surface of the light emitting portion are provided on the back surface side of the cover member. The gas leak alarm according to claim 4, wherein the light emitting unit further includes a partition wall that surrounds the bottom surface and the inclined surface of the light emitting unit and is erected so as to partition the back surface portion of the light emitting unit from another portion. vessel. The item according to any one of claims 1 to 5 , wherein the amount of titanium oxide contained in the constituent material of the light emitting portion is smaller than the amount of titanium oxide contained in the constituent material of the other portion of the cover member. Gas leak alarm.

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