JP6410981B1 - Alarm and electronic equipment - Google Patents

Abstract

An electrical device and an alarm device are provided that are capable of suppressing a failure of an electronic component or a sensor due to an impact. An alarm device is formed integrally with a substrate, a sensor disposed on the substrate, a case portion on which the substrate and the sensor are disposed, and contacts the sensor. In addition to holding the sensor 1 in the state, the shock-absorbing portion 8 is provided to reduce the impact on the sensor 1. The buffer portion 8 includes a cantilever portion 81 that is bent and deformed with respect to the rear outer wall portion 31 by providing a slit-like vent hole portion 31 a in the rear outer wall portion 31 of the rear case portion 30. [Selection] Figure 3

Description

  The present invention relates to an alarm device and an electronic device.

  Conventionally, electronic devices are known (for example, refer to Patent Document 1).

  Patent Document 1 discloses a holding device for a large electronic component that includes a holding portion that includes an elastic portion and a contact portion that are formed integrally with a housing. The holding device is provided with a substrate on which large electronic components are mounted on the lower surface. In this holding device, a gap is formed between the large electronic component mounted on the substrate and the holding portion. When an impact load is applied to the substrate and the large electronic component, the large electronic component contacts the contact portion and the elastic portion is bent and deformed, so that the impact load applied to the substrate and the large electronic component is absorbed.

JP 59-44084 A

  However, in the large electronic component holding device described in Patent Document 1, since a gap is formed between the large electronic component and the holding portion, the large electronic component is applied each time an impact load is applied to the substrate or the large electronic component. The component and the contact portion (housing) collide. For this reason, in the holding device (electronic device) described in Patent Document 1, a large electronic component (sensor) fails due to repeated collisions between the large electronic component and the contact portion (housing). There is a problem that there is.

  The present invention has been made to solve the above-described problems, and one object of the present invention is an electronic apparatus capable of suppressing a failure of an electronic component or a sensor due to an impact. And providing an alarm.

In order to achieve the above object, an alarm device according to a first aspect of the present invention includes a substrate, a sensor disposed on the substrate, a notification unit that notifies detection of a gas to be detected by the sensor, a substrate and a sensor. A case portion that is disposed, and a buffer portion that is integrally formed with the case portion, holds the sensor in a state of contact with the sensor, and relieves an impact on the sensor. The case portion is provided with a vent hole portion that communicates the outside and the inside of the case, and is configured to bend and deform .

In the alarm device according to the first aspect of the present invention, as described above, the buffer portion is formed integrally with the case portion so as to hold the sensor while being in contact with the sensor and to reduce the impact on the sensor. Configure. Further, the buffer portion is configured to bend and deform by providing the case portion with a ventilation hole portion that communicates the outside and the inside of the case portion. Thereby, since the sensor is held in a state where the buffer part is in contact with the sensor, even when an impact load is applied to the substrate or the electronic component, the buffer part (case part) and the sensor are prevented from colliding. As a result, sensor failure due to collision can be suppressed. In addition, by forming the buffer part integrally with the case part, it is possible to suppress an increase in the number of parts of the sensor, unlike when the buffer part is formed separately from the case part.

In the above SL alarm by the first station surface, preferably, the vent holes, a slit-shaped hole formed in the outer wall of the case portion.

In alarm device according to the first station surface, preferably, the buffer unit includes a cantilever portion to mitigate the impact on the sensor.

In the electronic device according to the second aspect of the present invention, a substrate, an electronic component disposed on the substrate, a notification unit that notifies detection of a gas to be detected by the electronic component, and a case in which the substrate and the electronic component are disposed. And a buffer portion that is formed integrally with the case portion and holds the electronic component in contact with the electronic component and also reduces the impact on the electronic component. The case portion is provided with a vent hole portion that communicates with the inside of the case portion, so that it is bent and deformed .

By configuring the electronic device according to the second aspect of the present invention as described above, even in the electronic device according to the second aspect, the electronic component is subjected to an impact on the part of the electronic component while being in contact with the electronic component. While being held, it can be relieved by a buffer part formed integrally with the case part. As a result, it is possible to suppress the failure of the electronic component while suppressing an increase in the number of components of the electronic device.

  According to the present invention, as described above, it is possible to suppress a failure of an electronic component or a sensor due to an impact.

It is the perspective view which showed the structure of the alarm device by 1st Embodiment of this invention. It is the disassembled perspective view which showed the structure of the alarm device by 1st Embodiment of this invention. It is the fragmentary sectional view which looked at the buffer part and sensor by a 1st embodiment of the present invention in the direction of arrow X2. It is the front view which showed the arrangement | positioning relationship between the buffer part and sensor by 1st Embodiment of this invention. It is the fragmentary sectional view which looked at the arrangement | positioning relationship between the buffer part and sensor by 1st Embodiment of this invention in the arrow Z2 direction. It is a figure for demonstrating a mode that the buffer part by 1st Embodiment of this invention eases the impact load added to a sensor. It is the perspective view which showed the structure of the alarm device by 2nd Embodiment of this invention. It is the fragmentary sectional view which showed the arrangement | positioning relationship between the buffer part and sensor by 2nd Embodiment of this invention. It is the perspective view which showed the structure of the attachment engaging part of the alarm device by 2nd Embodiment of this invention. It is the fragmentary sectional view which showed the structure of the alarm device by the 1st modification of 1st and 2nd embodiment of this invention. It is the figure which showed the structure of the alarm device by the 2nd modification of 1st and 2nd embodiment of this invention. It is the fragmentary sectional view which showed the structure of the alarm device by the 3rd modification of 1st and 2nd embodiment of this invention. It is the fragmentary sectional view which showed the structure of the alarm device by the 4th modification of 1st and 2nd embodiment of this invention. It is the fragmentary sectional view which showed the structure of the alarm device by the 5th modification of 1st and 2nd embodiment of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

[First Embodiment]
With reference to FIGS. 1-6, the structure of the alarm device 100 by 1st Embodiment of this invention is demonstrated. The alarm device 100 is an example of the “electronic device” in the claims.

(Whole structure of alarm device)
As shown in FIGS. 1 and 2, the alarm device 100 according to the first embodiment includes a sensor 1, a display unit 2, a speaker 3, and a substrate 4. The alarm device 100 detects the gas to be detected by the display unit 2 or the speaker 3 based on the processing of the detection circuit and the control circuit formed on the substrate 4 when the sensor 1 detects the gas to be detected. The detection is notified (displayed or uttered). The sensor 1 is an example of the “electronic component” in the claims. The display unit 2 and the speaker 3 are examples of the “notification unit” in the claims.

  In the first embodiment, the alarm device 100 is configured as a wall-mounted alarm device. Specifically, as shown in FIG. 2, the alarm device 100 includes a case portion 5 and a mounting plate 6. In the case part 5, the sensor 1, the display part 2, the speaker 3 and the substrate 4 are arranged. The mounting plate 6 is disposed on the rear side (rear side: arrow Y2 direction side) of the case portion 5.

  For example, the alarm device 100 is arranged on the wall by hooking the hole 61 of the mounting plate 6 on a fastening member fixed to the wall (the wall of the building). Further, the mounting plate 6 is provided with a cord arrangement portion 62 that can be arranged in a state where an electric cord (not shown) is wound. As shown in FIG. 1, a gap D is formed between the mounting plate 6 and the case portion 5 (rear outer wall portion 31), and ventilation (ventilation) is performed in the gap D.

  In the present specification, “front side” means, for example, the side where the display unit 2 of the alarm device 100 is arranged, and means the side in the direction of arrow Y1 in FIG. Further, “rear side” or “rear side” means the rear side or rear side (wall side) of the alarm device 100, and means the direction of arrow Y2 in FIG. Further, “upper (celestial)” means the direction of arrow Z1, “lower (bottom)” means the direction of arrow Z2, “left” means the direction of arrow X1, and “right” means the direction of arrow X2.

  As shown in FIG. 2, the alarm device 100 is provided with a plurality of sensors 1. For example, the alarm device 100 is provided with a CO sensor 11 that uses carbon monoxide gas as a detection gas and a methane gas sensor 12 that detects city gas (methane gas) as the sensor 1. The CO sensor 11 and the methane gas sensor 12 are examples of “electronic component” and “sensor” in the claims.

  The display unit 2 includes, for example, a light emitting diode (LED) mounted on the substrate 4. And as shown in FIG. 1, the display part 2 is comprised so that light emission may be carried out to the arrow Y1 direction side via the case part 5 (front side outer wall part 21). The speaker 3 is arranged inside the case unit 5 (speaker arrangement chamber 51 b), and is configured to emit a sound to the outside of the alarm device 100 through the speaker hole 3 a of the case unit 5.

  The board | substrate 4 is arrange | positioned inside the case part 5 (board | substrate arrangement | positioning chamber 51a), and is formed in the flat form extended on the XZ plane (it extends to a X direction and extends to a Z direction). A circuit pattern for connecting the sensor 1, the display unit 2, the speaker 3, and various electronic components to each other is formed on the substrate 4. Electronic components such as the display unit 2 and the switch 41 are mounted on the surface of the substrate 4. The speaker 3 is connected to the substrate 4 via an electric wire (not shown). Further, the sensor 1 is arranged on the substrate 4 by soldering the lead wires 12b of the sensor 1 to the substrate 4.

(Structure of the case part)
As shown in FIG. 1, the case part 5 is formed in the box shape which has a substantially rectangular parallelepiped shape. For example, the case part 5 is comprised with resin. In detail, the case part 5 is formed of a flame-retardant ABS resin (copolymer synthetic resin of acrylonitrile, butadiene and styrene). And the case part 5 contains the front side case part 20 which comprises the arrow Y1 direction side of the box-shaped case part 5, and the rear side case part 30 which comprises the arrow Y2 direction side of the box-shaped case part 5.

  Here, in the first embodiment, as shown in FIG. 3, the device room 51 and the sensor room 52 are arranged inside the case part 5 with the front case part 20 and the rear case part 30 being combined with each other. And are configured. The device chamber 51 and the sensor chamber 52 are configured with a partition wall 53 therebetween.

  Further, the device chamber 51 and the sensor chamber 52 are prevented from passing each other by the partition wall portion 53 and the cushion member 9. Thus, unlike the case where the device chamber 51 and the sensor chamber 52 can be ventilated, when the gas to be detected enters the sensor chamber 52, the gas concentration of the gas to be detected in the sensor chamber 52 is rapidly improved. Therefore, the response time of the sensor 1 can be shortened (responsiveness can be improved).

  As shown in FIG. 2, the equipment room 51 includes a board placement room 51a in which the board 4 is placed and a speaker placement room 51b in which the speaker 3 is placed. The substrate placement chamber 51a and the speaker placement chamber 51b are spaced apart by a partition wall 54.

  The sensor chamber 52 is disposed, for example, in the vicinity of the end in the left-right direction (X direction) of the box-shaped case portion 5 and in the vicinity of the end in the up-down direction (Z direction). Specifically, the sensor chamber 52 is surrounded by the front outer wall portion 21 and the right outer wall portion 22 of the front case portion 20, the rear outer wall portion 31 and the right outer wall portion 32 of the rear case portion 30, and the partition wall portion 53. Space. The partition wall 53 is continuous to the front outer wall portion 21 and the right outer wall portion 22, and is continuous to the portion 53 a formed integrally with the front case portion 20, the rear outer wall portion 31 and the right outer wall portion 32. And the rear case portion 30 and a portion 53b formed integrally. And the part 53a and the part 53b are adjoined (contacted) in the front-back direction, and are arrange | positioned.

  As shown in FIG. 1, the front case portion 20 is provided with a plurality of vent holes 23 from the front outer wall portion 21 to the right outer wall portion 22. As shown in FIG. 3, the case portion 5 is configured to be ventilated (ventilated) between the outside of the case portion 5 and the sensor chamber 52 by a plurality of vent holes 23. As a result, the gas to be detected is introduced into the sensor chamber 52 when the gas to be detected exists around the alarm device 100 (outside the case unit 5).

  As shown in FIG. 4, in the sensor chamber 52, the CO sensor 11 and the methane gas sensor 12 are arranged in parallel in the X direction. As shown in FIG. 3, the methane gas sensor 12 includes a sensor main body 12 a having a sensor element (not shown) disposed therein and having a cylindrical shape, and a lead wire 12 b connecting the sensor main body 12 a and the substrate 4. Including. Further, the CO sensor 11 includes a sensor main body 11a and a lead wire (not shown), like the methane gas sensor 12.

  The methane gas sensor 12 introduces the gas to be detected from the tip of the cylindrical sensor main body 12a into the sensor element inside the sensor main body 12a, and the detection result (detection voltage or detection current) via the lead wire 12b. Is transmitted to the substrate 4. Similar to the methane gas sensor 12, the CO sensor 11 is configured to transmit a detection result to the substrate 4 via a lead wire.

  As shown in FIG. 3, in the first embodiment, the methane gas sensor 12 is arranged on the substrate 4 in a state of protruding from the substrate 4 in the direction in which the substrate 4 extends. Specifically, the cylindrical sensor main body 12a is arranged so as to extend from the substrate 4 in the direction of the arrow Z1 substantially in parallel with the substrate 4 extending along the XZ plane. A part on the bottom side (arrow Z2 direction side) of the sensor main body 12a is arranged in the substrate arrangement chamber 51a. The lead wire 12b of the sensor 1 has one end connected to the bottom of the sensor main body 12a and the other end soldered to the substrate 4. The configuration of the CO sensor 11 is the same as that of the methane gas sensor 12.

  As shown in FIG. 1, a switch cover portion 24 is provided on the lower side (arrow Z2 direction side) of the front case portion 20. The switch cover 24 is configured to press (operate) the switch 41 when pressed in the direction of the arrow Y2. For example, the switch 41 is configured as a switch for stopping the alarm at the time of alarm.

(Composition of buffer part)
As shown in FIG. 3, in the first embodiment, the alarm device 100 is formed integrally with the case unit 5, holds the sensor 1 in a state of being in contact with the sensor 1, and also impacts the sensor 1. A buffer portion 8 is provided for relaxing the above.

  Specifically, as shown in FIG. 4, in the first embodiment, the buffer portion 8 has a rear portion provided with a slit-like vent hole portion 31 a in the rear outer wall portion 31 of the rear case portion 30. It includes a cantilever portion 81 that bends and deforms with respect to the side outer wall portion 31 (see FIG. 6).

  Further, the rear outer wall portion 31 is provided with a slit-like vent hole portion 31a having a substantially U shape in the rear outer wall portion 31 of the rear case portion 30 when viewed from the arrow Y1 direction side. A cantilever portion 81 extending in the direction of the arrow Z1 is formed. The vent hole portion 31 a is provided at a position that constitutes the sensor chamber 52 of the rear outer wall portion 31, and is configured to ventilate (ventilate) the outside of the case portion 5 and the sensor chamber 52. . Therefore, in the first embodiment, the case portion 5 is formed from three directions by the vent hole portion 23 provided on the arrow Y1 direction side and the arrow X2 direction side and the vent hole portion 31a provided on the arrow Y2 direction side. The sensor chamber 52 can be guided to the air and the sensor chamber 52 can be ventilated.

  As shown in FIG. 3, the portion on the arrow Z2 direction side (partition wall 53 side) of the cantilever part 81 is fixed to the rear outer wall part 31, while the side of the cantilever part 81 in the arrow Z1 direction (partition wall) The tip 81 a on the side opposite to the portion 53 is not fixed to the rear outer wall 31. Thereby, as shown in FIG. 6, the buffer part 8 is configured such that the cantilever part 81 is bent and deformed in the Y direction so that the tip part 81a moves in the Y direction. As shown in FIG. 3, the thickness t <b> 1 of the cantilever beam portion 81 is smaller than the thickness t <b> 2 of the rear outer wall portion 31 in the direction in which the cantilever beam portion 81 is bent and deformed (Y direction).

  As shown in FIG. 5, the buffer portion 8 is provided in the vicinity of the distal end portion 81 a (see FIG. 3) of the cantilever portion 81, and a portion 82 a that contacts the side surface 11 c of the sensor main body portion 11 a and the sensor main body portion. It has the contact part 82 including the part 82b which contacts the side surface 12c of 12a. That is, the buffer unit 8 serves as both a buffer unit for reducing the impact of the CO sensor 11 and a buffer unit for reducing the impact of the methane gas sensor 12.

  The surfaces of the portions 82a and 82b of the contact portion 82 are configured as flat surfaces, for example. The portion 82a is in line contact with the side surface 11c of the sensor main body 11a. The portion 82b is in line contact with the side surface 12c of the sensor main body 12a. Thereby, the buffer part 8 is comprised so that the sensor 1 may be hold | maintained in the state which contacted the sensor 1. FIG. When the diameter d1 of the cylindrical CO sensor 11 is smaller than the diameter d2 of the cylindrical methane gas sensor 12, the protruding length L1 (the thickness in the Y direction) of the portion 82a is the protruding length L2 of the portion 82b. It is configured larger than.

  Further, when viewed from the arrow Z1 direction side, the portions 53a and 53b of the partition wall portion 53 have concave shapes that are recessed along the outer peripheries of the sensor main body portions 11a and 12a, respectively. The partition wall portion 53 and the sensor main body portions 11a and 12a are disposed close to each other, and a gap CL is formed between the partition wall portion 53 and the sensor main body portions 11a and 12a.

  Further, as shown in FIG. 5, in the first embodiment, the alarm device 100 is disposed in the sensor chamber 52, and the side surface 11d of the sensor body 11a on the arrow Y1 direction side and the arrow Y1 of the sensor body 12a. A cushion member 9 is provided in contact with the side surface 12d on the direction side (surface contact). For example, as shown in FIG. 3, the front case portion 20 is provided with a recess 25 that is recessed in the direction of the arrow Y <b> 1, and the cushion member 9 is disposed in the recess 25.

  Further, the cushion member 9 is formed separately from the case portion 5 and is configured to expand and contract in the Y direction. For example, the cushion member 9 is formed of a softer material (a material that is easily elastically deformed) than the case portion 5. Accordingly, the sensor main body portions 11a and 12a are in contact with the buffer portion 8 on the arrow Y1 direction side, and are held from the Y2 direction side and held by the cushion member 9 from the arrow Y1 direction side. As shown in FIG. 6, even when an impact load G is generated in the Y direction on the sensor 1 (sensor body portion 12 a), the buffer portion 8 is bent and deformed in the Y direction, and the cushion member 9 is in the Y direction. The impact is reduced by expanding and contracting.

  Further, the cushion member 9 is disposed adjacent to the partition wall portion 53. Here, when the cushion member is arranged away from the partition wall (on the arrow Z1 direction side), the sensor chamber is enlarged in order to secure the volume in the sensor chamber on the arrow Z1 direction side of the cushion member. However, by arranging the cushion member 9 adjacent to the partition wall portion 53 as in the configuration of the first embodiment, the sensor chamber 52 is prevented from being enlarged in order to secure the internal volume of the sensor chamber 52. Is done.

[Effect of the first embodiment]
In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the buffer portion 8 is formed integrally with the case portion 5 so that the sensor 1 is held in contact with the sensor 1 and the impact on the sensor 1 is reduced. Configure. Thereby, since the buffer 1 holds the sensor 1 in contact with the sensor 1, even when an impact load G is applied to the substrate 4 or the sensor 1, the buffer 8 (the case 5) collides with the sensor 1. Is suppressed. As a result, the failure of the sensor 1 and the failure of the elements inside the sensor 1 due to the collision can be suppressed. Moreover, by forming the buffer part 8 integrally with the case part 5, unlike the case where the buffer part 8 is formed separately from the case part 5, an increase in the number of parts of the alarm device 100 can be suppressed. .

  In the first embodiment, as described above, the sensor 1 is arranged on the substrate 4 in a state of protruding from the substrate 4. Moreover, the buffer part 8 is comprised so that the sensor 1 may be hold | maintained in the state which contacted the side surfaces 11c and 12c of the sensor 1 along the protrusion direction of the sensor 1. As shown in FIG. Here, even when the impact load G is applied to the sensor 1 in a direction crossing the projecting direction of the sensor 1, the sensor 1 can absorb the impact load G without colliding with the case portion 5 or the like. As a result, the failure of the sensor 1 due to the impact load G can be suppressed more effectively.

  Further, in the first embodiment, as described above, the buffer portion 8 is provided with the slit-like vent hole portion 31 a in the rear outer wall portion 31 of the case portion 5, whereby the rear outer wall portion 31 is provided. A cantilever portion 81 that is bent and deformed is provided. Thereby, the buffer part 8 can be easily comprised by providing the vent-hole part 31a in the rear side outer wall part 31 of the case part 5. FIG. Moreover, since the hole part for comprising the buffer part 8 can be used as the ventilation hole part 31a, the gas to be detected can be introduced into the case part 5 (sensor chamber 52) by the ventilation hole part 31a. Moreover, the temperature rise in the case part 5 can be suppressed by ventilating the inside of the case part 5 by the vent hole part 31a. As a result, a hole portion for configuring the buffer portion 8, a vent hole portion 31a for introducing the gas to be detected into the case portion 5, and a vent hole portion 31a for suppressing a temperature rise in the case portion 5. Unlike the case where each is configured separately, the configuration of the alarm device 100 (case unit 5) can be prevented from becoming complicated. Moreover, by providing the buffer part 8 with the cantilever part 81, it is possible to easily bend and deform as compared with the case where the outer wall part not provided with both the support beam part or the hole part is used as the buffer part. That is, the buffer portion 8 can be configured to be easily bent and deformed while the rear outer wall portion 31 of the case portion 5 is configured to be relatively difficult to bend and deform.

  In the first embodiment, as described above, the thickness t1 of the cantilever part 81 is smaller than the thickness t2 of the rear outer wall part 31 in the direction in which the cantilever part 81 is deformed (Y direction). To do. Thereby, the cantilever part 81 can be more easily bent and deformed by the amount that the thickness t1 of the cantilever part 81 is smaller than the thickness t2 of the rear outer wall part 31. Further, the mechanical strength of the case portion 5 can be increased by the amount that the thickness t2 of the rear outer wall portion 31 is larger than the thickness t1 of the cantilever portion 81.

  In the first embodiment, as described above, the alarm device 100 has a sensor different from the direction (side surfaces 11c and 12c on the arrow Y2 direction side) arranged in the case unit 5 and in contact with the buffer unit 8. A cushion member 9 is provided in contact with one side surface 11d and 12d. As a result, the sensor 1 is held from two or more directions by the buffer portion 8 and the cushion member 9 from both sides of the side surfaces 11c and 12c on one side and the side surfaces 11d and 12d on the other side of the sensor 1. Even when the impact load G is applied to the sensor 1, the impact load G can be absorbed and the sensor 1 can be prevented from malfunctioning. Further, by forming the cushion member 9 formed separately from the case portion 5 from a softer material than the case portion 5, the buffer portion 8 formed integrally with the case portion 5 is formed by a relatively hard member. Even if it is, the impact applied to the sensor 1 can be absorbed more effectively. Note that when the shock load G applied to the sensor 1 can be absorbed only by the cushion member, the cushion member needs to be formed along the outer periphery of the cylindrical sensor 1. In this case, there arises a problem that the configuration of the cushion member is complicated. On the other hand, the shock applied to the sensor 1 can be absorbed by simplifying the configuration of the cushion member by providing the buffer portion 8 as in the first embodiment.

[Second Embodiment]
Next, the configuration of the alarm device 200 of the second embodiment will be described with reference to FIGS. The alarm device 200 according to the second embodiment is configured as an alarm device for ceiling arrangement, unlike the alarm device 100 according to the first embodiment which is configured as a wall-mounted alarm device. In addition, about the structure same as the said 1st Embodiment, the same code | symbol is attached | subjected and illustrated in the figure, The description is abbreviate | omitted.

(Configuration of alarm device according to the second embodiment)
The alarm device 200 according to the second embodiment of the present invention includes a case unit 205 as shown in FIG. For example, the case part 205 has a substantially circular shape (substantially disk shape) when viewed from the arrow Z2 direction side (lower side). The alarm device 200 is an example of the “electronic device” in the claims.

  As shown in FIG. 8, the sensor 1 is disposed in the sensor chamber 252 of the case unit 205, and the substrate 204 and the speaker 203 (see FIG. 7) are disposed in the device chamber 251 of the case unit 205. The speaker 203 is configured to notify that the gas to be detected is detected by the sensor 1 through the speaker hole 203a of the case unit 205. The speaker 203 is an example of the “notification unit” in the claims.

  Case portion 205 includes a lower case portion 220 and an upper case portion 230. As shown in FIG. 9, the upper case portion 230 is provided with a mounting engagement portion 232 that is formed in a hook shape protruding in the direction of the arrow Z <b> 1 and engages a ceiling (an attachment member attached to the ceiling). . Thereby, the case part 205 is comprised so that fixation (attachment) to a ceiling is possible. That is, the alarm device 200 is configured as an alarm device for ceiling placement.

  As shown in FIG. 8, in the second embodiment, the alarm device 200 is formed integrally with the upper case portion 230, holds the sensor 1 in a state of being in contact with the sensor 1, and impacts the sensor 1. A buffer portion 208 is provided to alleviate the above. Specifically, the buffer unit 208 is configured in substantially the same manner as the buffer unit 8 according to the first embodiment. That is, as shown in FIG. 9, the buffer portion 208 is provided with a vent hole portion 233 having a substantially U shape when viewed from the arrow Z1 direction side in the outer wall portion 231 of the upper case portion 230. Accordingly, as shown in FIG. 8, the buffer 208 protrudes from the cantilever portion 281 and the cantilever portion 281 to the arrow Z2 direction side, and at the arrow Z1 direction side of the sensor 1 (sensor main body portion 12a). And a contact portion 282 that contacts the side surface 12c.

  The cantilever beam portion 281 is configured to be able to bend and deform in the Z direction. Further, the thickness t11 of the cantilever portion 281 is smaller than the thickness t12 of the outer wall portion 231 in the direction in which the cantilever portion 281 bends (Z direction).

  The lower case portion 220 is provided with a cushion member 209 that contacts the side surface 12d of the sensor 1 (sensor body portion 12a) on the arrow Z2 direction side. In addition, the lower case portion 220 is provided with a plurality of vent holes 223 that ventilate (vent) the sensor chamber 252 and the outside of the case portion 205. In addition, the upper case portion 230 is provided with a plurality of vent holes 234 that ventilate (vent) the sensor chamber 252 and the outside of the case portion 205. The rest of the configuration according to the second embodiment is the same as the configuration of the first embodiment.

[Effects of Second Embodiment]
In the second embodiment, the following effects can be obtained.

  In the second embodiment, as described above, the alarm device 200 is configured as an alarm device for ceiling placement. In addition, the alarm device 200 is provided with a buffer portion 208 that is formed integrally with the upper case portion 230, holds the sensor 1 in contact with the sensor 1, and reduces the impact on the sensor 1. Thereby, also in the alarm device 200 for ceiling arrangement | positioning by 2nd Embodiment, the failure of the sensor 1 can be suppressed, suppressing the number of parts of the alarm device 200 increasing. The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

[Modification]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the present invention is applied to an alarm device and a sensor has been described, but the present invention is not limited to this. That is, the configuration of the present invention can be similarly applied to an electronic component that may fail due to an impact and an electronic device including the electronic component.

  In the first and second embodiments described above, the sensor is configured to detect carbon monoxide (CO) and methane (city gas), but the present invention is not limited to this. For example, the present invention may be applied to an alarm device including a sensor that detects a gas to be detected other than carbon monoxide and methane. For example, the present invention may be applied to an alarm device including a sensor that detects propane / butane gas (LP gas) as a gas to be detected.

  Moreover, in the said 1st and 2nd embodiment, although the example which provides two sensors in an alarm device was shown, this invention is not limited to this. That is, one sensor may be provided in the alarm device, or three or more sensors may be provided. For example, when three or more sensors are provided in the alarm device, it is preferable to provide a buffer portion having the same number of contact portions as the number of sensors that respectively contact the three or more sensors.

  Moreover, in the said 1st and 2nd embodiment, although the sensor was hold | maintained by the buffer part and the cushion member, this invention is not limited to this. For example, unlike the alarm device 300 according to the first modification shown in FIG. 10, the sensor 1 is configured to be held by the buffer portions 308a and 308b from both sides in the front-rear direction (Y direction) without providing a cushion member. May be.

  Here, as shown in FIG. 10, the alarm device 300 according to the first modification includes a sensor 1, a front case part 320, and a rear case part 330. The rear outer wall portion 331 of the rear case portion 330 is provided with a buffer portion 308a that contacts the side surface of the sensor 1 on the arrow Y2 direction side, and extends from the partition wall portion 353 of the front case portion 320 in the arrow Z1 direction. In addition, a buffer portion 308b that contacts the side surface of the sensor 1 on the arrow Y1 direction side is provided. Thereby, the sensor 1 is hold | maintained at the buffer parts 308a and 308b from the both sides of a Y direction (front-back direction).

  Moreover, although the example (refer FIG. 4) hold | maintaining two sensors by one buffer part was shown in the said 1st and 2nd embodiment, this invention is not limited to this. For example, a buffer unit 408a (and 408b) may be provided for each sensor as in the alarm device 400 according to the second modification shown in FIG. Specifically, the alarm device 400 is provided with a substantially M-shaped vent hole portion 432 in the outer wall portion 431 of the case portion, so that the alarm device 400 is in contact with and holds a CO sensor (not shown). A buffer portion 408a and a methane gas sensor buffer portion 408b that is held in contact with a methane gas sensor (not shown) are formed.

  In the first and second embodiments, in the rear outer wall portion (outer wall portion), the partition wall portion side portion of the cantilever beam portion is fixed to the rear outer wall portion, and the cantilever beam partition wall portion and Although the example (refer FIG. 3) comprised so that an other side part may not be fixed to a rear side outer wall part was shown, this invention is not limited to this. For example, as in the alarm device 500 according to the third modification shown in FIG. 12, in the rear outer wall portion 531, a portion of the cantilever portion 581 opposite to the partition wall portion 53 is fixed to the rear outer wall portion 531. The part on the partition wall 53 side of the cantilever part 581 may be configured not to be connected to the rear outer wall part 531.

  Here, as shown in FIG. 12, the alarm device 500 according to the third modification includes a rear case portion 530. A rear hole portion 531 a is formed in the rear outer wall portion 531 in the rear outer wall portion 531 of the rear case portion 530, thereby forming a cantilever portion 581. Unlike the cantilever portion 81 of the first embodiment, the cantilever portion 581 is formed so as to extend in the arrow Z2 direction. That is, in the rear outer wall portion 531, the portion on the arrow Z1 direction side of the cantilever beam portion 581 is fixed to the rear outer wall portion 531, and the portion on the arrow Z2 direction side of the cantilever beam portion 581 is the rear outer wall portion. Not connected to 531. In the case of the alarm device 500 of the third modified example, the vent hole portion 531a (the U-shaped bottom portion) is close to the partition wall portion 53 as compared with the alarm device 100 according to the first embodiment. The possibility that air from the part 531a enters the equipment room 51 is increased. On the other hand, in the first embodiment, since the vent hole portion 31a (U-shaped bottom) is arranged at a position away from the partition wall portion 53, the air from the vent hole portion 31a is supplied to the equipment room. It is possible to suppress entry into 51.

  In the first and second embodiments, an example is shown in which a slit-shaped hole is formed in the outer wall portion of the case portion in the alarm device, and the cantilever portion is configured to bend and deform with respect to the outer wall portion. The present invention is not limited to this. For example, like the alarm device 600 according to the fourth modified example shown in FIG. 13, the rear outer wall 631 is bent with respect to the rear outer wall 631 without forming a slit-like hole in the rear outer wall 631. A deformable cantilever portion 681 may be formed.

  Moreover, although the example which comprises the thickness of a cantilever part smaller than the thickness of an outer wall part was shown in the said 1st and 2nd embodiment, this invention is not limited to this. That is, the thickness of the cantilever portion may be greater than or equal to the thickness of the outer wall portion as long as it can be sufficiently bent and deformed.

  Moreover, in the said 1st and 2nd embodiment, although the example comprised so that a sensor main-body part may have a cylindrical shape was shown, this invention is not limited to this. That is, you may comprise so that a sensor main-body part may have shapes (for example, quadrangular prism shape) other than cylindrical shape.

  In the first and second embodiments, the example in which the buffer portion is held in contact with the side surface of the electronic component (sensor) is shown, but the present invention is not limited to this. That is, the buffer portion may hold a surface other than the side surface of the electronic component. For example, like the alarm device 700 according to the fifth modified example shown in FIG. 14, the buffer portion 708b is configured to hold the end surface 701a of the sensor 701 on the arrow Z1 direction side (tip portion in the protruding direction of the sensor 701). Also good.

  Moreover, although the buffer part hold | maintained the electronic component (sensor) from one direction (Y direction) in the said 1st and 2nd embodiment, this invention is not limited to this. That is, the electronic component (sensor) may be held by the buffer from two different directions (for example, the Y direction and the Z direction). For example, as in the alarm device 700 according to the fifth modification shown in FIG. 14, the buffer portion 708a contacts the side surface 701b on the arrow Y2 direction side of the sensor 701 to hold the sensor 701 from the Y direction, and the buffer portion 708b. May be configured to contact the end surface 701a on the arrow Z1 direction side of the sensor 701 and hold the sensor 701 from the Z direction. Note that both the buffer portions 708a and 708b are formed integrally with the case portion 705.

1,701 Sensor (electronic component)
2 Display part (notification part)
3, 203 Speaker (notification unit)
4, 204 Substrate 5, 205, 705 Case part 8, 208, 308a, 308b, 408a, 408b, 508, 608, 708a, 708b Buffer part 11 CO sensor (electronic component, sensor)
12 Methane gas sensor (electronic parts, sensor)
31, 331, 531, 631 Rear outer wall (outer wall)
31a, 233, 432, 531a Vent hole (hole)
81,281,581,681 Cantilever part 100,200,300,400,500,600,701 Alarm (electronic equipment)
231 and 431 outer wall

Claims (4)

A substrate,
A sensor disposed on the substrate;
An informing unit for informing the detection of the gas to be detected by the sensor;
A case portion in which the substrate and the sensor are disposed;
A buffer part that is formed integrally with the case part, holds the sensor in a state of being in contact with the sensor, and relaxes an impact on the sensor,
The said buffer part is an alarm device comprised so that it may bend and deform | transform by the vent hole part which connects the exterior and the inside of the said case part being provided in the said case part. The alarm device according to claim 1 , wherein the vent hole is a slit-shaped hole formed in an outer wall portion of the case portion. The buffer unit includes a cantilever portion to alleviate the impact to the sensor, alarm as claimed in claim 1 or 2. A substrate,
Electronic components disposed on the substrate;
A case portion in which the substrate and the electronic component are disposed;
A buffer portion that is formed integrally with the case portion, holds the electronic component in a state of contact with the electronic component, and relaxes an impact on the electronic component;
The said buffer part is an electronic device comprised so that it may bend and deform | transform by providing the vent hole part which connects the exterior and the inside of the said case part in the said case part.

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