WO2017073582A1

WO2017073582A1 - Equipment-mounting structure, mounting plate for same, alarm unit, fire alarm unit, alarm device, and method for manufacturing same

Info

Publication number: WO2017073582A1
Application number: PCT/JP2016/081643
Authority: WO
Inventors: 隼人津留見; 学榎本; 朋彦島津
Original assignee: ホーチキ株式会社
Priority date: 2015-10-28
Filing date: 2016-10-25
Publication date: 2017-05-04
Also published as: JP6907367B2; JP6899016B2; JP2020091925A; JP2020098652A; JP6868725B2; JP2020091926A; TWI746472B; JP7416879B2; JP2021152902A; JPWO2017073582A1; JP7134290B2; JP2022169752A; JP2020091927A; JP6868726B2; TW201719027A

Abstract

[Problem] To provide an equipment-mounting structure and a mounting plate with which it is possible to prevent a screw for securing the mounting plate from affecting the equipment body. [Solution] The equipment body 1 is mounted on an installation surface using a mounting plate 2. The mounting plate 2 has a screw hole 22 through which a screw 30 for securing the mounting plate 2 to the installation surface is inserted. A riser 23 that is at least as high as the head part 31 of the screw 30 is formed around the screw hole 22.　

Description

Equipment mounting structure and its mounting plate, alarm device, fire alarm device, alarm device and manufacturing method thereof

The present invention relates to a device mounting structure that is mounted on a wall surface or a ceiling surface of a building and its mounting plate, an alarm device that detects an abnormality such as a fire, a fire alarm device, an alarm device, and a manufacturing method thereof.

This application is Japanese Patent Application No. 2015-21508 which is a Japanese patent application filed on October 28, 2015, Japanese Patent Application No. 2015-224619 which is a Japanese patent application filed on November 17, 2015, November 2015 Japanese Patent Application No. 2015-215527, a Japanese patent application filed on 2 days, Japanese Patent Application No. 2015-234562, a Japanese patent application filed on December 1, 2015, and Japanese Patent Application filed on April 22, 2016 Claims the benefit of Japanese Patent Application No. 2016-086052, which is incorporated herein by reference in its entirety.

In the case of equipment that is installed on a building surface such as a building wall or ceiling, the equipment body may be fixed by a mounting plate. Examples of such devices include fire alarms and gas alarms. The fire alarm detects smoke, heat, or flame generated by a fire with a sensor, and emits an alarm by sound or light when a fire is detected.

The mounting plate has one surface that comes into contact with the installation surface of the building and is fixed, and the other surface is a surface that can fix the device body. When the device main body is attached to the installation surface, first, the attachment plate is fixed to the installation surface with screws, and the device main body is attached and fixed to the fixed attachment plate. As a device mounting structure including a mounting plate and a device main body, for example, there is one as described in Patent Document 1.

スピーカー A speaker for sounding is provided in the fire alarm housing. The speaker issues an alarm when a fire is detected. The speaker is fixed in the casing, and an acoustic hole is formed in the front portion of the casing at a position facing the speaker. The sound from the speaker is propagated to the front side of the housing through the acoustic hole. As such a fire alarm device, for example, there is one disclosed in Patent Document 2.

Mainly on the front of the housing, fire alarms are mainly installed on the front of the housing in order to easily perform operations such as first power-on, periodic operation test, and alarm stop when alarming. An operation button is provided. By pressing the operation button, the push button switch inside the fire alarm can be pressed, and various operations can be performed. The operation button may be provided with a pull string attachment portion. When the fire alarm is provided at a high place, the operation button can be operated by pulling the pull string by attaching the pull string to the operation button. As a fire alarm provided with such an operation button, for example, there is one disclosed in Patent Document 3.

The fire alarm is attached to the installation surface such as the wall or ceiling of the building, detects smoke generated by the fire with the sensor unit, and emits an alarm by sound or light when a fire is detected. Smoke detection in the fire alarm is performed by a smoke detector having a light emitting part and a light receiving part. The light receiving unit is arranged so that light from the light emitting unit does not directly enter the smoke detecting unit. When smoke enters the smoke detector, a part of the light from the light emitting part is scattered by the smoke, and the presence of the smoke can be detected by receiving the scattered light at the light receiving part. Since the smoke detector detects smoke on the principle described above, it is necessary to prevent light from the outside from entering the smoke detector. For this reason, a smoke detector cover is provided so as to cover the area of the smoke detector. The smoke detection unit cover is provided with a plurality of wall portions rising from the base portion along the circumferential direction. By this wall portion, light from the outside is shielded and prevented from entering the light receiving portion. As a fire alarm device having such a smoke detection unit cover, for example, there is one disclosed in Patent Document 4.

Conventionally, a photoelectric smoke detector that is installed on the installation surface of the monitoring area and detects an alarm by detecting the smoke in the monitoring area has been proposed (for example, Patent Document 5). Such a conventional photoelectric smoke detector generally includes a light emitting element, a light receiving element, a light receiving lens, a detection unit main body, and a smoke detection unit, and is partitioned from the light emitting element by a detection unit main body and a smoke detection unit. The light receiving lens condenses the scattered light in the smoke detector based on the light emitted in the detection space, and the light receiving element receives the collected light. Based on the amount of light received by the light receiving element, the detection space Detected the smoke that flowed into the water and gave an alarm. Here, when assembling such a photoelectric smoke detector, first, a light emitting element and a light receiving element are attached to a mechanism for mounting provided in the main body of the detection unit (such as a hole having a shape corresponding to the light emitting element and the light receiving element). ) To determine the optical axis of the light emitting element and the light receiving element, and in this state, insert the connection line (foot) of the light emitting element and the light receiving element into the through hole of the board, and then solder the connection line to the board And implemented it.

JP 2007-47896 A JP 2012-14742 A JP 2007-122414 A JP2011-248545A JP 2010-39935 A

When the mounting plate is screwed to the installation surface, the head of the screw is exposed on the front side of the mounting plate, that is, on the mounting side of the device body. When the device main body is attached to the mounting plate, if the head of the screw hits the device main body, the device main body may be damaged. For example, in a device main body on which a battery is mounted, there is a possibility that the head of the screw collides with the battery, thereby damaging the battery. In addition, there is a possibility that the head of the screw may damage the wiring etc. of the device main body. In particular, when the device main body is thinned, a space margin is reduced in the device main body, so that the head of the screw exposed from the mounting plate is likely to affect the device main body.

In the fire alarm, the sound level from the speaker is required to be higher than a predetermined level. That is, the sound pressure of the speaker must be equal to or higher than a predetermined value, but the diameter of the speaker that can be mounted is limited as the housing is downsized. For this reason, it is desired to increase the sound pressure while keeping the diameter of the speaker as it is.

It is desirable to increase the size of the operation buttons in order to make the operation buttons easier to operate. However, increasing the size of the operation button complicates the structure for pressing and returning to the original position, increasing the number of parts of the operation button, or complicating the shape of the operation button itself. It was. Since the structure of the operation button is complicated, the pressing operation may vary due to component tolerance.

Miniaturization is required for fire alarms. The smoke detector cover has a substantially V-shaped wall for improving light shielding, so the radial size is relatively large, which is a factor that hinders downsizing of fire alarms. It was.
In addition, the fire alarm is provided with a speaker for sound output, and if this speaker is arranged so as to partially overlap the smoke detector cover in the thickness direction of the housing, sufficient sound pressure can be obtained from the speaker. Since there is a possibility of disappearing, it is necessary to arrange them so that they do not overlap. As fire alarms have become smaller and the housing has become smaller, it has become difficult to arrange them so that they do not overlap.

However, in the mounting method as described above, it is necessary to insert the connection line between the light emitting element and the light receiving element into the through hole of the substrate at the same time, which makes it difficult to insert the light emitting element and the light receiving element. Needed. In addition, an attachment mechanism for attaching the light emitting element and the light receiving element to the detection unit main body is required, which complicates the mechanism of the detection unit main body.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a device mounting structure and a mounting plate that can prevent a screw fixing the mounting plate from affecting the device body.
In addition, the present invention has been made in view of the above problems, and provides an alarm device that can increase the sound pressure of a speaker mounted in a housing, and can save space and securely fix a speaker. The purpose is to do.
Another object of the present invention is to provide an alarm device that can perform a pressing operation and a returning operation to the original position without variation with a simple structure.
In addition, the present invention has been made in view of the above problems, and an object of the present invention is to provide a fire alarm capable of downsizing a smoke detector and arranging the smoke detector cover so that it does not overlap a speaker or the like in the housing. And
In addition, the present invention has been made in view of the above problems, and can simplify the mounting operation of the detection means (corresponding to the light emitting element and the light receiving element) and the mechanism of the covering means (corresponding to the detection unit main body). An object of the present invention is to provide an alarm device and a method for manufacturing the same.

In order to solve the above-described problem, the device mounting structure according to claim 1 is a device mounting structure in which a device main body is mounted to an installation surface by a mounting plate, and the mounting plate has a screw for fixing to the installation surface. A screw hole portion to be inserted is provided, and a rising portion having a height equal to or higher than the head portion of the screw is formed around the screw hole portion.

The device mounting structure according to claim 2 is the device mounting structure according to claim 1, wherein the mounting plate includes a device fixing surface portion that fixes the device body, and the device fixing surface portion is associated with the device body. A locking piece portion to be stopped and the screw hole portion are formed, and the rising portion is formed so as to rise from the device fixing surface portion.

The device mounting structure according to claim 3 is the device mounting structure according to

claim

1 or 2, wherein the device main body has a battery storage portion for storing a battery, and the battery storage portion opens toward the mounting plate. The screw hole portion is formed at a position facing the battery housing portion.

The device mounting structure according to claim 4 is the device mounting structure according to any one of claims 1 to 3, wherein the device main body is a fire alarm that detects the occurrence of a fire and issues an alarm. To do.

The mounting plate according to claim 5 is a mounting plate for mounting a device main body to an installation surface, wherein the mounting plate has a screw hole portion through which a screw for fixing to the installation surface is inserted, A rising portion having a height equal to or higher than the head portion of the screw is formed around the screw hole portion.

The mounting plate according to claim 6 is the mounting plate according to claim 5, wherein the mounting plate has a device fixing surface portion for fixing the device main body, and the device fixing surface portion locks the device main body. A locking piece portion and the screw hole portion are formed, and the rising portion is formed so as to rise from the device fixing surface portion.

The alarm device according to claim 7, wherein an alarm device having a speaker that emits sound from the front is provided in the housing, and the housing includes a substrate portion having a speaker fixing portion for arranging and fixing the speaker. An acoustic hole is formed in the front portion of the body at a position facing the front surface of the speaker, and the speaker fixing portion is engaged with a base surface portion facing the back surface of the speaker and a peripheral portion of the speaker. The base surface portion has one or more through portions.

The alarm device according to claim 8 is the alarm device according to claim 7, wherein the substrate portion is accommodated in a hollow interior of the housing, and a space portion is provided between the substrate portion and the rear surface portion of the housing. And the space is closed at least on the rear surface side of the housing.

The alarm device according to claim 9 is the alarm device according to claim 7 or 8, wherein the locking portion includes a plurality of locking pieces provided along a circumferential direction of the speaker formed in a substantially circular shape. It is characterized by that.

The alarm device according to claim 10 is the alarm device according to claim 7 or 8, wherein the locking portion is formed of a pair of locking pieces opposed to each other in the diameter direction of the speaker formed in a substantially circular shape. It is characterized by that.

The alarm device according to claim 11 is the alarm device according to claim 9 or 10, wherein the locking piece portion is elastically moved with respect to the fixed locking piece portion fixed to the substrate portion and the substrate portion. It is characterized by comprising a movable locking piece portion.

The alarm device according to claim 12 is the alarm device according to claim 11, wherein the moving locking piece portion is formed as an elastic piece supported in a cantilever manner on the base surface portion.

An alarm device according to a thirteenth aspect is the alarm device according to any one of the seventh to twelfth aspects, wherein the penetrating portion includes a plurality of small holes formed in the base surface portion.

The alarm device according to claim 14 is the alarm device according to claim 11, wherein the moving locking piece portion is elastically formed by two slit portions reaching from one end portion of the base surface portion to a position exceeding at least the center of the base surface portion. It is formed in a deformable elastic piece, and the slit portion is the penetrating portion.

The alarm device according to claim 15 is the alarm device according to claim 11, wherein the moving locking piece portion is formed in an island-like portion connected to the substrate portion by a thin bridge portion. The gap between the island-shaped part and the base surface part is the penetrating part.

The alarm device according to claim 16, wherein the alarm device includes a housing and an operation button provided on the housing and capable of pressing and returning, and the operation button has a rotation shaft portion on an outer peripheral portion, The housing has an opening for receiving the operation button, and a bearing portion for holding the rotating shaft portion at an edge of the opening, and the operation button is connected to the housing with respect to the operation button. It has the latching | locking part latched in the state urged | biased in the return operation | movement direction, It is characterized by the above-mentioned.

The alarm device according to claim 17 is the alarm device according to claim 16, wherein the operation button is provided with the rotating shaft portion in the vicinity of one end portion, and from one end portion to the other end portion where the rotating shaft portion is provided. It has a long shape.

The alarm device according to claim 18 is the alarm device according to claim 16 or 17, wherein the operation button includes an operation portion exposed from the opening, and an outward extending from one end of the operation portion. It has an extension part, and the rotating shaft part is provided in the outward extension part.

The alarm device according to claim 19 is the alarm device according to claim 18, wherein the operation button extends from one end of the operation portion in the same direction as the outward extension portion. And the locking portion is formed at the tip of the elastic piece.

The alarm device according to claim 20 is the alarm device according to any one of claims 16 to 19, wherein the operation button has a rearward extension portion extending rearward, and the rearward extension portion. Has a slit portion through which the drawstring is inserted, and the slit portion can be deformed in the direction of increasing the width.

The fire alarm device according to claim 21, wherein the smoke alarm portion has a smoke detector cover so as to surround a smoke detection region in which the sensor portion is disposed. The smoke detector cover has a plurality of light shielding wall portions along a circumferential direction, the light shielding wall portion has a single plate shape, and the interior and the outside of the smoke detection region communicate with each other between the adjacent light shielding wall portions. The light shielding wall portions are arranged so as to overlap each other in the radial direction so that one of the light shielding wall portions is positioned on the radiation centered on the detection position of the sensor portion. It is characterized by that.

The fire alarm device according to claim 22 is the fire alarm device according to claim 21, wherein the light shielding wall portion is inclined in a radial direction along a circumferential direction of the smoke detection region from a base portion of the smoke detection portion cover. It is characterized by being arranged and erected.

The fire alarm device according to claim 23 is the fire alarm device according to claim 21 or 22, wherein the light shielding wall portion has an arcuate surface portion forming an outer peripheral surface of the smoke detection region.

A fire alarm device according to claim 24, wherein a light emitting portion is arranged in the smoke detection area, and at least the light emitting portion of the light shielding wall portion is the fire alarm device according to any one of claims 21 to 23. An uneven shape is formed on the surface that receives light from.

The alarm device according to claim 25 is a substrate on which an element can be mounted, and a detection means electrically mounted on the substrate, wherein the substance to be detected is contained in the gas flowing into the detection space Detecting means for detecting whether or not, and covering means arranged so as to cover the substrate and the detecting means without interfering with the detecting means, and interposed between the substrate and the detection space Covering means.

An alarm device according to a twenty-sixth aspect is the alarm device according to the twenty-fifth aspect, wherein the detecting means includes a light receiving means for detecting whether or not a substance to be detected is included based on the amount of received light. The alarm device is a noise preventing means for preventing noise to the light receiving means, and is formed by being fixed to the light receiving means so that the light receiving means faces a predetermined direction. Noise prevention means for determining the axis is provided.

The alarm device according to claim 27 is the alarm device according to claim 25 or 26, wherein the alarm device is a flange for promoting the inflow of the gas into the detection space, and is integrally formed on an outer edge portion of the covering means. Provided with a flange.

A warning device according to a twenty-eighth aspect is the warning device according to any one of the twenty-fifth to twenty-seventh aspects, wherein the power supply urging means for urging and holding a power supply unit that supplies power to the warning device. The power supply biasing means is integrally formed with the covering means.

An alarm device according to a twenty-ninth aspect is the alarm device according to any one of the twenty-fifth to twenty-eighth aspects, wherein the alarm device is an accommodating means for accommodating an output means for outputting an alarm, and is integrally formed with the covering means. A storage means is provided.

The alarm device according to claim 30 is the alarm device according to any one of claims 25 to 29, wherein the detection means is a light emitting means for emitting light to the detection space, and is attached to the substrate. Comprising light emitting means arranged in a state bent from a position in a predetermined direction,
The substrate includes a substrate hole provided at a position corresponding to a bent portion of the light emitting unit, and a substrate hole into which an angle determining device for determining an attachment angle of the light emitting unit with respect to the substrate can be inserted. .

An alarm device according to a thirty-first aspect is the alarm device according to the thirty-third aspect, wherein the alarm device according to the thirty-first aspect is an accommodating means for accommodating the detecting means and the covering means inside the alarm device. The housing means includes a closing means for closing the substrate hole.

The alarm device according to claim 32 is the alarm device according to claim 31, wherein the closing means is a support means capable of supporting the detection means.

An alarm device according to a thirty-third aspect is the alarm device according to any one of the twenty-fifth to thirty-second embodiments, wherein the detection means includes a light emission side detection means that emits light to the detection space, and Light receiving side detecting means for detecting whether or not the substance to be detected is contained in the gas flowing into the detection space based on the amount of light, the covering means from the light emitting side detecting means to the covering means A light emitting hole for introducing light into the detection space and a light receiving hole for introducing reflected light from the detection space through the covering means to the light receiving side detection means, Have.

An alarm device according to a thirty-fourth aspect is the alarm device according to the thirty-third aspect, wherein a groove portion is formed around the light emitting hole or the light receiving hole in a surface of the covering means that faces the detection space. And a groove portion recessed toward the opposite side to the detection space.

An alarm device according to a thirty-fifth aspect is the alarm device according to the thirty-third or thirty-fourth aspect, wherein the alarm means is a light shielding means formed around the light emitting hole or the light receiving hole in a surface of the covering means facing the substrate. A light-shielding means that is disposed so as to be raised toward the substrate and covers the periphery of the light-emitting side detection means or the light-receiving side detection means.

In the method for manufacturing an alarm device according to claim 36, the detection means for detecting whether or not the substance to be detected is contained in the gas flowing into the detection space is attached to the substrate on which the element can be mounted at a predetermined angle. An attachment step; a mounting step of electrically mounting the detection means attached to the substrate in the attachment step with respect to the substrate while maintaining the predetermined angle; and the substrate in the mounting step and the substrate. A covering means installation step of installing a covering means interposed between the substrate and the detection space so as to cover the detection means mounted on the substrate.

According to the first aspect of the present invention, even if an object approaches the head of the screw from the front, it can be prevented from coming into contact with the rising portion and coming into contact with the head of the screw.
In addition, the head of the screw of the mounting plate can be prevented from affecting the front side. In addition, the rising portion can be used as a guide for the depth of tightening the screw, and according to the thickness of the mounting plate, an appropriate tightening depth and strength can be obtained. Can be securely fixed to the installation surface.

According to the invention of claim 2, even if the mounting plate side of the device main body approaches the head of the screw, it abuts on the rising portion and does not contact the head of the screw. It can prevent giving.

According to the invention of claim 3, even if the battery approaches the head of the screw, the battery contacts the rising portion and does not contact the head of the screw, so that the screw can be prevented from affecting the battery.

According to the invention of claim 4, in the fire alarm, it is possible to prevent the head of the screw from affecting the alarm body.

According to the invention of claim 5, even if the device main body approaches the screw head from the front, the screw head does not contact the head of the screw by contacting the rising portion. It can be prevented from reaching.
Further, the head of the screw of the mounting plate can be prevented from affecting the device main body. In addition, the rising portion can be used as a guide for the depth of tightening the screw, and according to the thickness of the mounting plate, an appropriate tightening depth and strength can be obtained. Can be securely fixed to the installation surface.

According to the invention of claim 6, even if the mounting plate side of the device main body approaches the head of the screw, it contacts the rising portion and does not contact the head of the screw. It can prevent giving.

According to the seventh aspect of the present invention, a part of the sound generated by the vibration on the front side of the speaker can be transmitted to the back surface of the speaker through the penetrating portion, and can be efficiently resonated in the housing. The pressure can be improved.
Further, by resonating a part of the sound from the speaker in the housing, the sound pressure from the speaker can be improved. As a result, a sound pressure exceeding a predetermined level can be obtained even with a small-diameter speaker, and the housing can be downsized.

According to the invention according to claim 8, a closed space is formed between the substrate portion and the rear surface portion of the housing, and the sound from the speaker guided through the penetration portion can be more easily resonated, The sound pressure can be further improved.

According to the invention according to claim 9, since the speaker is locked and fixed by the locking piece portion at a plurality of positions in the circumferential direction, the speaker can be stably fixed to the substrate portion, and due to environmental changes such as temperature or humidity, It can suppress that the fixed state of a speaker changes.

According to the invention of claim 10, since the speaker is locked and fixed so as to be sandwiched by the pair of locking pieces from both sides, the speaker can be stably fixed to the substrate portion, and the environment such as temperature or humidity It is possible to suppress a change in the fixed state of the speaker due to the change.

According to the invention of claim 11, after the one end portion of the speaker is locked to the fixed locking piece portion, the other end portion of the speaker can be easily locked and fixed to the moving locking piece portion, The fixing work of the speaker can be facilitated.

According to the invention of claim 12, the movable locking piece can be moved elastically with a simple structure.

According to the thirteenth aspect of the present invention, it is possible to prevent insects and the like from entering through the penetrating portion, and it is possible to optimize the improvement of the sound pressure of the speaker by closing some small holes.

According to the invention of claim 14, the amount of deformation of the elastic piece can be increased, the locking and fixing of the speaker can be facilitated, and the slit portion becomes the through portion, so there is no need to form a separate through portion, The structure can be simplified.

According to the fifteenth aspect of the present invention, the movable locking piece can be elastically moved with a simple structure, and the gap serves as a penetrating portion. Can be

According to the sixteenth aspect of the present invention, the operation button can be pressed so as to be tilted about the rotation shaft portion, and the locking portion is urged against the casing in the return operation direction of the operation button. The operation button can be securely fixed to the housing.
In addition, the operation button can be pressed and returned with a simple structure, and since the number of components is small, variations in the pressing operation due to component tolerances can be suppressed.

According to the invention of claim 17, it is possible to increase the distance between the portion to be pressed and the rotating shaft portion, and to sufficiently secure the pressing depth of the operation button.

According to the invention of claim 18, the rotating shaft portion can be further separated from the operation portion, and the pressing depth of the operation button can be further increased.

According to the invention of claim 19, the operation button can be reliably operated in the return direction by the elastic deformation of the elastic piece accompanying the pressing of the operation button.

According to the invention of claim 20, when a pull string is provided in the slit portion, when a large force is applied to the pull string, the slit portion is deformed and the pull string is pulled out. It is possible to prevent force from being applied.

According to the twenty-first aspect of the present invention, it is possible to prevent light from directly entering the sensor unit from the outside while setting the smoke detecting unit cover to a minimum diameter.
In addition, the smoke detector can be downsized while maintaining the light shielding function from external light, and the smoke detector cover can be arranged so as not to overlap the speaker or the like in the downsized housing.

According to the invention of claim 22, it is possible to dispose adjacent light shielding wall portions in the radial direction while providing a gap between the light shielding wall portions.

According to the invention of claim 23, an intermittent circumferential surface can be formed on the outer peripheral side of the light shielding wall portion, and the net member can be arranged on the outer peripheral side.

According to the invention of claim 24, since the light from the light emitting part is scattered by the uneven shape of the light shielding wall part, the reflected light of the light from the light emitting part incident on the sensor part is reduced, and the sensor part Can be prevented from malfunctioning.

According to the alarm device of claim 25, since the covering means does not interfere with the substrate and the detecting means, after setting all the detecting means on the covering means, the covering means is covered with the substrate and the through hole of the substrate is formed. In addition, it is possible to eliminate the work of simultaneously inserting the connecting lines of the detection means, to simplify the mounting work of the detection means, and it is not necessary to provide a mechanism for attaching the detection means to the covering means. It becomes possible to simplify the mechanism and improve the productivity of the alarm device.

According to the alarm device of the twenty-sixth aspect, since the detecting means includes the light receiving means and the noise preventing means is formed integrally with the light receiving means, the mounting work of the light receiving means and the noise preventing means can be simplified. At the same time, it is not necessary to provide the covering means with a mechanism for attaching the light receiving means and the noise preventing means to the covering means, and it is possible to simplify the mechanism of the covering means and improve the productivity of the alarm device.

According to the alarm device of claim 27, since the flange for promoting the inflow of gas into the detection space is provided at the outer edge of the covering means, the amount of gas inflow into the detection space can be increased, and the detection accuracy can be increased. It becomes possible to improve.

According to the alarm device of the twenty-eighth aspect, since the power supply biasing means to which the stress from the power supply portion is always applied is integrally formed with the covering means that cannot be visually recognized from the outside, it can be visually recognized from the outside like the housing means Compared with the case where it is provided in a simple mechanism, the deformation due to the stress becomes inconspicuous, and appearance defects can be prevented.

According to the alarm device of claim 29, since the storage means for storing the output means connected to the substrate is formed integrally with the covering means, the output means can be arranged on the same side as the substrate in the covering means. It is possible to improve the productivity of the alarm device by simplifying the connection of the means to the substrate.

According to the alarm device of claim 30, since the board hole through which the angle determination device can be inserted is provided in the substrate, the mounting angle of the light emission means can be reduced by an extremely easy method of inserting the angle determination device and suppressing the light emission means. Can be easily determined, and the productivity of the alarm device can be improved.

According to the alarm device of the thirty-first aspect, since the accommodating means is provided with the closing means for closing the substrate hole, the erroneous detection due to the light of the light emitting means circulated from the substrate hole and received by the light receiving means is prevented. It is possible to improve the detection accuracy.

According to the alarm device of the thirty-second aspect, since the closing means can support the detection means, when an external force is applied to the detection means for any reason, the angle of the detection means changes and the detection accuracy is increased. It is possible to prevent the decrease.

According to the alarm device of claim 33, since the covering means includes the light emitting hole and the light receiving hole, the covering means covers the substrate and suppresses the accumulation of dust on the substrate, while the light emitting hole and the light receiving hole prevent the dust from accumulating. It can be set as the structure which does not inhibit the optical axis of a light emission side detection means and a light reception side detection means.

According to the alarm device of the thirty-fourth aspect, since the groove portion recessed toward the opposite side to the detection space is provided around the light emitting hole and the light receiving hole, the dust is accumulated on the groove portion by accumulating the dust in the groove portion. It is possible to prevent the dust from accumulating on the light emitting hole or the light receiving hole in the covering means, and the dust accumulated around the light receiving hole is positioned on the light emitting axis or the light receiving axis. Can be prevented.

According to the alarm device of claim 35, the light emitting side detection is provided because the alarming device is arranged so as to be raised around the light emitting hole or the light receiving hole and covers the periphery of the light emitting side detecting means or the light receiving side detecting means. It is possible to prevent erroneous detection due to the light from the means being directly received by the light receiving side detection means without going through the detection space, and the dust accumulated in the covering means passes through the light emitting hole and the light receiving hole from the covering means. Then, the light falls on the light emitting side detecting means and the light receiving side detecting means and accumulates on the surface of the light emitting side detecting means and the light receiving side detecting means, thereby preventing the detection accuracy from being lowered.

According to the method for manufacturing an alarm device according to claim 36, since the covering means is installed after the detecting means is mounted on the substrate and electrically mounted, all the detecting means are set on the covering means. The work of covering the covering means with the substrate and simultaneously inserting the connecting lines of the detecting means into the through holes of the substrate can be omitted, the mounting work of the detecting means can be simplified, and a mechanism for attaching the detecting means is provided. There is no need to provide the covering means, and it is possible to simplify the mechanism of the covering means and improve the productivity of the alarm device.

It is the perspective view seen from the front side of the fire alarm of Embodiment 1. It is the perspective view seen from the back side of a fire alarm. It is a rear view of an alarm device main body. It is a front view of a mounting plate. It is a perspective view of the screw fastened to the installation surface and a mounting plate. It is a longitudinal cross-sectional view of a fire alarm. It is a front view of the fire alarm in this embodiment 2-1. FIG. 8 is a sectional view taken along line AA in FIG. FIG. 8 is a sectional view taken along line BB in FIG. It is a front view of a board | substrate part. It is a front view of the board | substrate part which attached the speaker. FIG. 12 is a cross-sectional view taken along the line AA in FIG. It is a front view of the board | substrate part used for the fire alarm of Embodiment 2-2. It is a front view of the board | substrate part used for the fire alarm of Embodiment 2-3. It is a front view of the fire alarm in this Embodiment 3. FIG. 16 is a cross-sectional view taken along line AA of FIG. It is a front view of an operation button. It is a side view of an operation button. FIG. 18 is a cross-sectional view taken along the line AA of FIG. It is the perspective view which looked at the operation button from the back side. It is a perspective view from the back side of a fire alarm. It is an enlarged view of back extension part vicinity in FIG. FIG. 16 is an enlarged view of the lower part of the housing in the BB cross section of FIG. 15. FIG. 17 is an enlarged cross-sectional view of the lower part of the housing in a state where the operation button is pressed from the state of FIG. 16. It is the perspective view seen from the front side of the fire alarm device in this Embodiment 4. It is a longitudinal cross-sectional view of a fire alarm. It is a perspective view of the board | substrate part which has a smoke detection part. It is sectional drawing showing the inside of a smoke detector. FIG. 29 is an enlarged view of a range in which the detection position of the sensor unit and the light shielding wall portion directly face each other in FIG. 28. It is a perspective view of the alarm device which concerns on this Embodiment 5. FIG. It is a bottom view of an alarm device. It is a side view of an alarm device. FIG. 32 is a cross-sectional view taken along arrow AA in FIG. 31. It is a disassembled perspective view of the alarm device seen from the lower side. It is a disassembled perspective view of the alarm device seen from the upper side. It is a bottom view of a mounting base. It is a top view of an attachment base. It is a bottom view of a back case. It is a top view of a back case. It is a front view of a back case. It is a top view of a front case. It is a front view of a front case. It is a bottom view of a detection part cover. It is a front view of a detection part cover in the state where an insect screen was omitted. It is a bottom view of a detection part main body. It is a top view of a detection part main body. It is a front view of a detection part main body. It is a bottom view of a circuit part. It is a top view of a circuit part. It is a front view of a circuit part. It is an expansion perspective view of a detection part main body. FIG. 33 is a cross-sectional view taken along line BB in FIG. 32. FIG. 53 is a cross-sectional view taken along the line CC of FIG. 52. It is a perspective view of a circuit board. It is sectional drawing which shows a circuit board and the jig | tool for mounting. It is a perspective view which shows the jig | tool for mounting of an initial state. It is a perspective view which shows the mounting jig in the state which has arrange | positioned the light emission part, the light-receiving part, and the shield in the mounting jig. It is a perspective view which shows the jig | tool for mounting in the state which mounted the circuit board. It is a perspective view which shows the mounting jig | tool which made the upper cover closed state.

Embodiment 1
Embodiment 1 of the present invention will be described in detail with reference to the drawings. In the first embodiment, description will be made assuming that the device attached to the installation surface is a fire alarm. FIG. 1 shows a perspective view seen from the front side of the fire alarm device according to the first embodiment, and FIG. 2 shows a perspective view seen from the rear side of the fire alarm device. The fire alarm device according to the first embodiment includes an alarm body 1 that detects the occurrence of a fire and issues an alarm, and a mounting plate 2 that attaches the alarm body 1 to the installation surface.

The alarm device body 1 has a housing 10 having a sensor for detecting smoke inside. The housing 10 has a smoke inlet 12 on a side surface thereof, the smoke is introduced from the smoke inlet 12 into the housing 10 and the smoke is detected by a sensor.

The housing 10 has a front surface 11 facing the indoor side. The front surface 11 has operation buttons 13 for performing various operations and an acoustic hole for emitting sound from a speaker provided inside the housing 10. 14 is provided.

The mounting plate 2 is provided on the back side of the alarm body 1 and can fix the alarm body 1. In the first embodiment, the installation surface to which the mounting plate 2 is fixed is the wall surface of the house. After the mounting plate 2 is fixed to the installation surface which is a vertical surface, the alarm device body 1 is mounted and fixed to the mounting plate 2.

The mounting plate 2 has an alarm fixing surface portion 20 formed in a substantially ring shape having a hole in the center. An upper protruding portion 21 is formed at the upper end portion of the alarm device fixing surface portion 20. The upper protruding portion 21 is used when there is a place to be hooked on the installation surface in advance, but is not used in the first embodiment. A groove-shaped notch is formed in the root portion of the upper protruding portion 21, and when the upper protruding portion 21 is not used, it can be easily folded and removed.

FIG. 3 shows a rear view of the alarm body 1. On the back surface of the alarm device body 1, a battery housing portion 16 is formed at the top, and a battery 17 is housed therein. The battery housing portion 16 is formed in a concave shape that opens to the back side, and the opening is not covered. Thereby, the housing 10 is thinned by the thickness of the lid. In addition, mounting plate fixing portions 15 are formed at three locations in the circumferential direction on the back surface of the alarm body 1. The mounting plate fixing portion 15 is formed so as to be able to rotate and lock with respect to the mounting plate 2.

The structure of the mounting plate 2 will be described in more detail. FIG. 4 shows a front view of the mounting plate 2. On the alarm device fixing surface portion 20 of the mounting plate 2, locking pieces 24 are formed in a claw shape at three locations along the circumferential direction. The locking piece portion 24 is formed at a position corresponding to the mounting plate fixing portion 15 formed on the back surface portion of the alarm device main body 1 and can be rotationally locked.

Also, the alarm fixing surface portion 20 is provided with a plurality of screw hole portions 22 through which screws for fixing the mounting plate 2 to the installation surface can be inserted. In this Embodiment 1, since the screw hole part 22 in the direction of the upper part 12 o'clock is used among the plurality of screw hole parts 22, the screw hole part 22 will be described below.

The screw hole portion 22 has a large diameter at the bottom and a small diameter at the top, and has a continuous bowl shape. Around the screw hole portion 22, a rising portion 23 that rises from the alarm fixing surface portion 20 is formed so as to surround the screw hole portion 22. The rising portion 23 is formed to have a substantially elliptical shape when viewed from the front.

FIG. 5 shows a perspective view of the screw 30 and the mounting plate 2 tightened on the installation surface. The screw 30 is previously tightened to a certain position with respect to the installation surface. At this time, the head 31 of the screw 30 is in a state of floating from the installation surface.

The screw hole portion 22 of the mounting plate 2 is formed to have a diameter that allows the lower large-diameter portion to pass through the head portion 31 of the screw 30. Therefore, the screw 30 can be inserted into the lower portion of the screw hole portion 22 and the screw 30 can be passed through the front surface side of the mounting plate 2. From this state, the mounting plate 2 is slid downward to place the screw 30 in the small diameter portion above the screw hole 22. Since the small diameter portion of the screw hole portion 22 is larger than the diameter of the screw 30 and smaller than the diameter of the head portion 31, the screw 30 is further tightened by positioning the screw 30 at the small diameter portion of the screw hole portion 22. Thus, the head portion 31 of the screw 30 can be brought into pressure contact with the peripheral portion of the screw hole portion 22, and the mounting plate 2 can be fixed to the installation surface by the screw 30.

At this time, the screw 30 is tightened to a position where the head portion 31 of the screw 30 does not protrude from the surrounding rising portion 23. That is, when the mounting plate 2 is viewed from the side, the screw 30 is tightened until the head portion 31 is completely hidden by the rising portion 23. Thus, the rising portion 23 can also be used as a guide for the depth at which the screw 30 is tightened.

Fig. 6 shows a longitudinal section of the fire alarm. The screw 30 is also shown in this figure. In a state where the mounting plate 2 is fixed to the installation surface with the screw 30, the head portion 31 of the screw 30 does not exceed the height of the rising portion 23 formed around the screw hole portion 22. That is, the height of the rising portion 23 is set so that the head portion 31 of the screw 30 does not protrude to the front side of the rising portion 23.

The screw hole portion 22 for fixing the screw 30 is located at the upper part of the mounting plate 2, and the battery 17 housed in the battery housing portion 16 of the alarm body 1 and the head portion 31 of the screw 30 face each other. Here, since the rising portion 23 having a height that does not protrude the head portion 31 is formed around the head portion 31 of the screw 30, the battery 17 does not contact the head portion 31 of the screw 30. Can be. That is, the head portion 31 of the screw 30 exposed to the front side from the mounting plate 2 can be prevented from affecting the alarm body 1.

The first embodiment of the present invention has been described above. However, the application of the present invention is not limited to the first embodiment, and can be applied in various ways within the scope of the technical idea. For example, in the first embodiment, the height of the rising portion 23 is substantially the same as the protruding height of the head portion 31 of the screw 30, but the rising portion 23 only needs to be higher than the protruding height of the head portion 31. It may be formed higher to the extent that it does not interfere with the alarm body 1. Further, the positions and number of the screw hole portions 22 and the rising portions 23 are not limited to those of the first embodiment, and can be appropriately arranged as necessary. Furthermore, in the first embodiment, the installation surface is a wall surface, but may be a ceiling surface. In the first embodiment, the device is a fire alarm, but may be another type of device such as a gas alarm.

[Embodiment 2]
Next, embodiments 2-1 to 2-3 of the present invention will be described in detail with reference to the drawings. In the embodiments 2-1 to 2-3, description will be made assuming that the alarm device is a fire alarm device. FIG. 7 shows a front view of the fire alarm in the present embodiment 2-1. The fire alarm device of the present embodiment 2-1 has an alarm device body 201 that detects the occurrence of a fire and issues an alarm.

The alarm device body 201 has a housing 210 having a sensor for detecting smoke and the like inside. The casing 210 has a smoke inlet on the side surface thereof, the smoke is guided from the smoke inlet into the casing 210, and the smoke is detected by an internal sensor.

The housing 210 has a front surface portion 211 facing the indoor side. The front surface portion 211 emits sound from operation buttons 214 for performing various operations and a speaker 217 provided inside the housing 210. Acoustic holes 215 are provided.

FIG. 8 shows a cross-sectional view along AA of FIG. On the back surface of the alarm device main body 201, a battery storage portion 218 is formed at an upper portion, and a battery 219 is stored therein. The battery storage portion 218 is formed in a concave shape that opens to the back side, and the opening is not covered. Thereby, the housing 210 is thinned by the thickness of the lid.

A substrate unit 216 is disposed inside the housing 210, and the substrate unit 216 is provided with a smoke detector 216a for detecting smoke flowing in from the smoke inlet. Although not shown in FIG. 8, a speaker 217 is attached and fixed to the board portion 216.

FIG. 9 shows a cross-sectional view taken along the line BB of FIG. As shown in this figure, in the hollow portion formed inside the casing 210, the substrate portion 216 is disposed at a substantially central position in the thickness direction, and the front surface 217a of the speaker 217 fixed to the substrate portion 216 has an acoustic hole. 215 opposite. In addition, a space portion is formed between the substrate portion 216 and the rear surface portion 212 of the housing 210 on the back side of the substrate portion 216. The area | region which forms this space part among the rear surface parts 212 of the housing | casing 210 does not have a hole etc., but is obstruct | occluded.

FIG. 10 shows a front view of the substrate portion 216. As shown in this figure, the substrate portion 216 has a substantially circular shape with a part cut off, and a sensor 216b for detecting smoke is disposed in the center portion. A speaker fixing part 220 is formed on the periphery of the substrate part 216, and the speaker 217 is fixed here.

The speaker fixing part 220 has a substantially circular rising part 221 with a part cut off, and the speaker 217 can be arranged inside the rising part 221. Inside the rising portion 221 is a base surface portion 222 that constitutes a part of the substrate portion 216 and faces the back surface of the speaker 2217. The base surface portion 222 is formed with a through portion 226 made up of a plurality of small holes.

A substantially T-shaped fixed locking piece 223 is provided on one side of the speaker fixing portion 220. The fixed locking piece portion 223 is integral with the substrate portion 216 and cannot move with respect to the substrate portion 216. In addition, on one side of the speaker fixing portion 220 facing the fixed locking piece portion 223, a moving locking piece portion 224 that is movable in a predetermined direction with respect to the substrate portion 216 is provided. The fixed locking piece portion 223 and the moving locking piece portion 224 are arranged to face each other in the diameter direction of the speaker 217 fixed to the speaker fixing portion 2220.

The movable locking piece 224 is formed at the tip of the elastic piece 225 supported in a cantilevered manner by the substrate 216. The elastic piece 225 is supported in a cantilever manner on the outer peripheral portion of the base surface portion 222, whereby the elastic piece 225 can be elastically deformed in the thickness direction with respect to the substrate portion 216. Thereby, the movement locking piece part 224 can move in the thickness direction with respect to the substrate part 216.

FIG. 11 is a front view of the substrate portion 216 to which the speaker 217 is attached, and FIG. 12 is a cross-sectional view taken along line AA of FIG. The speaker 217 has a speaker body 217c having a substantially circular shape, and has a pair of ear portions 217d opposed to each other in the diameter direction on the outer periphery of the speaker body 217c. A locking recess 217e for locking the fixed locking piece 223 or the moving locking piece 224 is formed in the ear 217d.

When attaching the speaker 217 to the speaker fixing portion 220, first, the locking recess 217e formed on the other ear portion 217d of the speaker 217 is fixed with the one ear portion 217d side floating from the base surface portion 222. The locking piece 223 is locked. Thereafter, when one ear 217d side is pressed against the movement locking piece 224, the elastic piece 225 is elastically deformed, and the movement locking piece 224 is locked to the other ear 217d. As a result, the speaker 217 is locked to the speaker fixing portion 220 at two locations facing each other in the diameter direction, and the speaker 217 can be stably held on the substrate portion 216.

Since the speaker 217 is elastically locked and fixed to the substrate part 216 at the ear part 217d facing in the diameter direction, the speaker 217 is prevented from changing its fixed state due to environmental changes such as temperature or humidity. be able to. Further, the speaker 217 is locked and fixed so as to be sandwiched between the fixed locking piece 223 and the moving locking piece 224, but the locking position is an ear 217 d formed in a protruding shape from the outer periphery of the speaker 217. Therefore, it is possible to prevent the speaker main body 217c from being deformed and to prevent a decrease in sound pressure.

As shown in FIG. 9, the speaker 217 has a front surface 217 a that vibrates and emits sound facing the front side of the substrate portion 216, and a back surface 217 b faces the base surface portion 222. Since the base surface portion 222 has a small hole-shaped through portion 226, the back surface 217 b of the speaker 217 is formed between the substrate portion 216 and the rear surface portion 212 of the housing 210 through the through portion 226. Facing the space.

When the speaker 217 emits sound, the front 217a side vibrates to generate sound, and the sound is propagated to the outside through the acoustic hole 215 of the housing 210. On the other hand, the vibration on the front surface 217a side of the speaker 217 spreads over the entire speaker 217, so that sound is also transmitted to the back surface 217b side of the speaker 217. The sound resonates in the space portion on the rear surface portion 212 side of the housing 210 via the through-hole 226 formed in the base surface portion 222 and is transmitted to the outside.

The effect of sound resonance on the back surface 217b side of the speaker 217 varies depending on the diameter of the speaker 217, the volume and shape of the space portion on the rear surface portion 212 side of the casing 210, the area of the through portion 226, and the like. In the present embodiment 2-1, since the through portion 226 is formed by a plurality of small holes, the area of the through portion 226 can be adjusted so that the effect of resonance is maximized.

Specifically, a large number of small holes are formed in the base surface portion 222 in advance, and a sound is emitted from the speaker 217 in a state where all parts of the fire alarm are assembled, and the sound pressure is measured. Next, a part of the small hole formed in the base surface portion 222 is closed with resin or the like, and sound is again emitted from the speaker 217 to measure the sound pressure. By repeating this, the number of small holes with the highest sound pressure is set as the number of small holes in the actual product. When manufacturing an actual product, a step of closing a part of the small holes formed in advance so as to have the set number of small holes is added to the substrate portion 216. Thereby, the fire alarm which made the sound pressure from the speaker 217 the maximum can be manufactured. The number of small holes may be adjusted individually or may be set for each production lot. In addition, you may make it form the penetration part 226 by all the same number of small holes, without performing this adjustment.

Thus, by forming the through-hole portion 226 communicating with the space portion formed between the substrate portion 216 and the rear surface portion 212 of the housing 210 in the base surface portion 222 facing the back surface 217b of the speaker 217, the speaker The sound pressure from 217 can be increased. That is, even if the diameter of the speaker 217 is reduced, a predetermined sound pressure can be achieved, so that the housing 210 can be downsized.

In addition, since the penetrating portion 226 is formed by a plurality of small holes, the sound pressure of the speaker 217 can be maximized by adjusting the number of small holes, and the smoke detection is performed because the through holes 226 are small holes. Invasion of insects or the like into the portion 216a side can also be prevented.

Next, Embodiment 2-2 of the present invention will be described. FIG. 13 shows a front view of the substrate unit 230 used in the fire alarm of Embodiment 2-2. Since the configuration of Embodiment 2-2 is the same as that of Embodiment 2-1, except for the speaker fixing portion 231 provided on the substrate unit 230, only the speaker fixing portion 231 will be described.

The speaker fixing portion 231 has a rising portion 232 that rises from the substrate portion 230 on the outer peripheral portion, and an inner region thereof is a base surface portion 233 that constitutes a part of the substrate portion 230. A fixed locking piece portion 234 is formed on one side of the base surface portion 233. Two slit portions 237 are formed on the side of the base surface portion 233 opposite to the side where the fixed locking piece portion 234 is formed. The slit portions 237 reach from the end portion to a position beyond the center of the base surface portion 233. The two slit portions 237 are formed so as to be parallel to each other, and are formed to have arc-shaped portions having different diameters. As a result, an elastic piece 236 that is elastically deformable in the thickness direction of the substrate portion 230 is formed on the base surface portion 233.

A movable locking piece 235 is formed at the tip of the elastic piece 236 so as to face the fixed locking piece 234 in the diameter direction of the speaker 217. The elastic piece 236 of the present embodiment 2-2 is the same as the embodiment 2-1 in that the elastic piece 236 is supported in a cantilever manner on the substrate unit 30, but the slit portion 237 forming the elastic piece 236 has one end. By reaching the position beyond the center of the base surface portion 233 from the portion, the amount of deformation of the elastic piece 236 is larger than in the case of the embodiment 2-1. Therefore, when attaching the speaker 217 to the speaker fixing portion 231, the movement locking piece 235 can be easily locked to the locking recess 217 e of the speaker 217, and the mounting work can be facilitated.

In addition, the slit portion 237 formed in the base surface portion 233 also functions as a through portion that communicates the back surface 217b of the speaker 217 and the space portion formed on the rear surface portion 212 side of the housing 210. Therefore, the effect of increasing the sound pressure from the speaker 217 can be obtained as in the case of the embodiment 2-1.

Next, Embodiment 2-3 of the present invention will be described. FIG. 14 shows a front view of the board portion 240 used in the fire alarm of Embodiment 2-3. Since the configuration of Embodiment 2-3 is the same as that of Embodiment 2-1, except for the speaker fixing portion 241 provided on the board portion 240, only the speaker fixing portion 241 will be described.

The speaker fixing portion 241 has a rising portion 242 that rises from the substrate portion 240 on the outer peripheral portion, and an inner region thereof is a base surface portion 243 that constitutes a part of the substrate portion 240. A fixed locking piece portion 244 is formed on one side of the base surface portion 243. On the side of the base surface portion 243 opposite to the side on which the fixed locking piece portion 244 is formed, a moving locking piece portion 245 is formed. The movable locking piece portion 245 is formed in an island-like portion 246 formed by connecting the substrate portion 240 with a thin bridge portion 247.

Since the island-like portion 246 is connected to the substrate portion 240 by a small-diameter bridge portion 247, the island-like portion 246 is elastic in the planar direction with respect to the substrate portion 240, specifically, in the direction away from the opposing fixed locking piece portion 244. It is possible to move. Thereby, the movement locking piece 245 can be moved. When the speaker 217 is attached to the speaker fixing portion 241, the speaker 217 having one locking recess 217 e locked to the fixed locking piece 244 moves the island-shaped portion 246 by elastic deformation of the bridge portion 247. By doing so, the other locking recess 217e can be locked to the moving locking piece 245.

Further, a gap portion 248 is formed between the island-like portion 246 and the substrate portion 240. Among these, the gap portion 248 formed on the central position side of the base surface portion 243 of the island-shaped portion 246 is disposed in the base surface portion 243, so that it is formed on the rear surface portion 217 b of the speaker 217 and the rear surface portion 212 side of the housing 210. It also functions as a penetrating part that communicates with the space part. Therefore, the effect of increasing the sound pressure from the speaker 217 can be obtained as in the case of the embodiment 2-1.

Although the embodiments 2-1 to 2-3 of the present invention have been described above, the application of the present invention is not limited to the embodiments 2-1 to 2-3, and can be applied in various ways within the scope of the technical idea. Can be done. For example, in Embodiments 2-1 to 2-3 described above, the speaker fixing portion 220 has one fixed locking piece 223 and one moving locking piece 224, which are arranged to face each other. However, three or more locking pieces may be disposed at a plurality of locations in the circumferential direction of the speaker 217. In this case, at least one locking piece portion can be a moving locking piece portion, and the other locking piece portions can be fixed locking piece portions.

[Embodiment 3]
Next, Embodiment 3 of the present invention will be described in detail with reference to the drawings. In the third embodiment, description will be made assuming that the alarm device is a fire alarm device. In FIG. 15, the front view of the fire alarm in this Embodiment 3 is shown. The fire alarm device of the third embodiment has an alarm body 301 that detects the occurrence of a fire and issues an alarm.

The alarm device body 301 includes a housing 310 having a sensor for detecting smoke and the like. The housing 310 has a smoke inlet on a side surface thereof, the smoke is guided from the smoke inlet to the inside of the housing 310, and the smoke is detected by a sensor.

The housing 310 has a front surface 311 facing the indoor side. The front surface 311 has operation buttons 313 for performing various operations and an acoustic hole for emitting sound from a speaker provided inside the housing 310. 314 are provided. The housing 310 is provided with an opening 310a for arranging the operation button 313 and exposing it to the front side.

When starting to use the fire alarm, the power can be turned on by first pressing the operation button 313. When powered on, the fire alarm will begin to detect fire. In addition, after the power is turned on, the sensor can be tested by pressing the operation button 313 at a normal time. The normal test can also be done for battery exhaustion, replacement time limit message, and speaker disconnection. Furthermore, when a fire is detected by the sensor and an alarm is issued, the alarm can be stopped by pressing the operation button 313. As described above, the operation button 313 can cause the fire alarm to perform different operations according to the situation by one pressing operation.

FIG. 16 is a cross-sectional view taken along the line AA in FIG. As shown in this figure, a battery storage portion 316 is formed in the upper portion of the back surface of the alarm device main body 301, and a battery 317 is stored therein. The battery storage portion 316 is formed in a concave shape that opens to the back side, and the opening is not covered. Thereby, the housing 310 is made thinner by the thickness of the lid.

The operation button 313 has an operation unit 320 exposed from the opening 310a of the housing 310. The operation unit 320 is substantially flush with the front surface 311 of the housing 310, and can be operated so as to press the operation unit 320 toward the back side of the housing 310. A switch 318 is disposed in the housing 310 so as to face the operation unit 320 of the operation button 313. When the operation button 313 is pressed, the switch 318 is pressed. When the switch 318 is pressed, the fire alarm can detect the pressing operation of the operation button 313.

The configuration of the operation button 313 will be described in more detail. 17 is a front view of the operation button 313, FIG. 18 is a side view of the operation button 313, FIG. 19 is a cross-sectional view taken along line AA of FIG. 17, and FIG. Each perspective view is shown. The operation button 313 includes a pair of outwardly extending portions 321 that are downwardly hung from a lower end portion that is one end portion of the operation portion 320 and an operation portion 320 that is formed in a substantially elliptical shape when viewed from the front. And an elastic piece 323 that hangs downward from the lower end of the operation portion 320 between the outward extension portions 321 and a rearward extension portion 325 that extends from the operation portion 320 toward the back side. The two outward extending portions 321 and the rear extending portion 325 are integrated to form a substantially U-shaped cross section that opens downward.

Rotating shaft portions 322 projecting sideways are formed on the surface of the outward extending portion 321 that faces the outside. The rotation shaft portion 322 is rotatably locked to the bearing portion 310b of the housing 310. Thereby, the operation button 313 can be rotated in the direction of tilting to the back side with the rotation shaft portion 322 as the center.

The elastic piece 323 is formed in a thin plate shape as shown in FIG. 19 and can be elastically deformed along the pressing direction of the operation unit 320. A locking portion 324 that protrudes to the front side is formed at the tip of the elastic piece 323. As shown in FIG. 16, the locking portion 324 is locked to a locking receiving portion 310 c formed near the lower end of the inner surface of the housing 310. In this locked state, the elastic piece 323 is slightly biased in the direction in which the operation button 313 returns from being pressed, that is, the front side of the alarm device body 301.

The operation button 313 has an edge 328 around the operation unit 320. The housing 310 has a step portion 310d at the edge of the opening 310a, and the edge portion 328 of the operation button 313 is in contact with the step portion 310d from the back side. As described above, since the operation button 313 is urged to the front side of the alarm main body 301 by the elastic piece 323, the edge portion 328 of the operation button 313 is in pressure contact with the step portion 310d of the housing 310. It has become. Thereby, it is possible to prevent the operation button 313 from wobbling or falling off due to unexpected force.

The elastic piece 323 is originally urged in the return direction of the operation button 313 as described above. However, when the operation button 313 is pressed and tilted about the rotation shaft portion 322, the locking portion 324 at the lower end is moved to the housing. Since it is locked to the body 310, it is elastically deformed so as to warp toward the back side, and the operation button 313 is urged in the return direction with a stronger force.

As shown in FIG. 20, a lateral slit 326 is formed near the rear end of the rear extension 325. In FIG. 21, the perspective view from the back side of a fire alarm is shown. As shown in this figure, the rear extension 325 of the operation button 313 is exposed on the back side of the housing 310.

FIG. 22 shows an enlarged view of the vicinity of the rear extension 325 in FIG. In this figure, the state where the pulling string 330 is attached to the rearward extending portion 325 is shown. The leading end of the drawstring 330 can be inserted through the slit portion 326. A knot is formed at the leading end of the drawstring 330, and the width of the slit portion 326 is set to be larger than the diameter of the drawstring 330 and smaller than the diameter of the knot. For this reason, a knot is formed in advance at the tip of the drawstring 330, a portion on the opposite side of the tip from the knot of the drawstring 330 is inserted into the slit portion 326, and the drawstring 330 is pulled downward, The pull string 330 can be easily attached to the operation button 313. The slit portion 326 to which the pull string 330 is attached is formed on the rear upper side with respect to the rotation shaft portion 322. Therefore, by pulling the pull string 330 downward, the operation button 313 is centered on the rotation shaft portion 322. It can be rotated in the direction of tilting to the side.

Since the slit part 326 is formed in the vicinity of the rear end of the rear extension part 325, the width of the rear end part 325a that is a part between the slit part 326 and the rear end of the rear extension part 325 is reduced. Yes. For this reason, the rear end part 325a of the rearward extension part 325 can be deformed in a direction in which the width of the slit part 326 is increased.

When a large force is applied to the drawstring 330, if the force is directly transmitted to the operation button 313, the operation button 313 or the housing 310 may be damaged. Since the slit portion 326 can be deformed in the direction in which the width is increased, when a large downward force is applied to the drawstring 330, the knot spreads the slit portion 326 and falls off as it is. It is possible to prevent a large force from being applied to the operation unit 320. The magnitude of the force with which the knot of the drawstring 330 is pulled out from the slit portion 326 can be set as appropriate according to the strength of the operation button 313 or the housing 310, but in the third embodiment, it is about 8 to 10 kg.

FIG. 23 shows an enlarged view of the lower portion of the housing 310 in the BB cross section of FIG. As shown in this figure, a U-shaped bearing portion 310b that opens upward is formed inside the housing 310, and the rotation shaft portion 322 of the operation button 313 is accommodated in the bearing portion 310b, so that it can rotate freely. It has become.

FIG. 24 shows an enlarged cross-sectional view of the lower portion of the housing 310 in a state where the operation button 313 is pressed from the state of FIG. Since the operation button 313 can be rotated around the rotation shaft portion 322 positioned below, when the operation portion 320 is pressed as shown in FIG. 24, the upper side of the operation portion 320 is tilted to the back side. Then, the operation unit 320 presses the switch 318 in the housing 310. At this time, as described above, the elastic piece 323 of the operation button 313 urges the operation button 313 in its return direction by the locking portion 324 being locked to the locking receiving portion 310c of the housing 310. However, it is elastically deformed so as to further urge the operation button 313 in the returning direction from that state. Therefore, when the hand is released from the operation unit 320, the operation button 313 can return to the original position. The operation button 313 operates in the same manner when the pull string 330 is attached to the rear extension 325 and the pull string 330 is pulled.

As described above, the push button is configured by the casing 310 having the bearing portion 310b and the operation button 313 which is integrally formed and has the rotating shaft portion 322, thereby enabling a pressing operation and a returning operation with a simple structure. it can. In addition, since the number of parts is small, variations in pressing operations due to part tolerances can be suppressed.

Further, the rotation shaft portion 322 serving as the rotation center of the operation button 313 is formed in the outward extending portion 321 below the operation portion 320 to be pressed, so that the pressing depth of the operation portion 320 is sufficiently increased. It can be secured. In particular, since the operation unit 320 has a substantially elliptical shape that is long in the vertical direction, the distance from the rotation shaft unit 322 can be increased and the pressing depth can be increased.

In addition, an elastic piece 323 having a locking portion 324 at the tip is formed in the lower part of the operation button 313, and the locking portion 324 is locked to the housing 310, so that when the operation portion 320 is pressed, Since the elastic piece 323 is elastically deformed and urges the operation button 313 to return to the original state, the operation button 313 can be returned when the hand is released from the operation unit 320. Further, the elastic piece 323 urges the operation button 313 in the return direction in a state where the locking portion 324 is locked to the housing 310, and the operation button 313 has an edge portion 328 on the back surface of the step 310 d of the housing 310. Since the contact is made from the side, the operation button 313 can be prevented from wobbling or coming off from the housing 310 and dropping off.

Although the third embodiment of the present invention has been described above, the application of the present invention is not limited to the third embodiment, and can be variously applied within the scope of its technical idea. For example, the position, size, and shape of the operation button 313 in the alarm device main body 301 are not limited to the third embodiment. In the third embodiment, the operation button 313 has a shape that is long in the vertical direction. However, the operation button 313 may have a shape that is long in the left-right direction, and may have a circular shape, a square shape, or the like. Further, the position of the rotation shaft portion 322 of the operation button 313 is not limited to the lower end portion, and may be the upper end portion, the left and right end portions, or the like. Further, in the third embodiment, the alarm device is a fire alarm device, but other types of alarm devices such as a gas alarm device may be used.

[Embodiment 4]
Finally, Embodiment 4 of the present invention will be described in detail with reference to the drawings. In FIG. 25, the perspective view seen from the front side of the fire alarm in this Embodiment 4 is shown. The fire alarm device according to the fourth embodiment includes an alarm main body 401 that detects the occurrence of a fire and issues an alarm, and a mounting plate 402 that attaches the alarm main body 401 to an installation surface.

The alarm device body 401 has a housing 410 having a sensor for detecting smoke and the like inside. The casing 410 has a smoke inlet 412 on a side surface thereof, the smoke is guided from the smoke inlet 412 to the inside of the casing 410, and the smoke is detected by a sensor.

The housing 410 has a front surface 411 facing the indoor side. The front surface 411 has an operation button 413 for performing various operations and an acoustic hole for emitting sound from a speaker provided inside the housing 410. 414.

The mounting plate 402 is provided on the back side of the alarm device body 401 and can fix the alarm device body 401. In the fourth embodiment, the installation surface to which the mounting plate 402 is fixed is a wall surface of a house. However, the installation surface such as the ceiling surface of the house may be another surface. After the mounting plate 402 is fixed to the installation surface, which is a vertical surface, the alarm device body 401 is mounted and fixed to the mounting plate 402.

FIG. 26 shows a longitudinal sectional view of the fire alarm. The mounting plate 402 has a screw hole portion 421, and is fixed to the installation surface by the screw 22 inserted through the screw hole portion 421. The mounting plate 402 has an alarm device fixing surface portion 420 that fixes the back surface side of the alarm device body 401. The alarm device body 401 is locked and fixed to the alarm device fixing surface 420.

The alarm device body 401 has a battery storage unit 416 at the top of the housing 410, and the battery 417 is stored in the battery storage unit 416. A smoke detector 430 for detecting smoke flowing from the smoke inlet 412 is disposed inside the housing 410. The smoke detecting section 430 is provided on the substrate section 432 accommodated in the housing 410, and has a smoke detecting area 431 for detecting the intruding smoke by blocking the light from the outside. The smoke detection unit cover 433 is covered.

FIG. 27 shows a perspective view of the substrate portion 432 having the smoke detecting portion 430. As shown in this figure, the substrate part 432 has a substantially circular shape with a part cut off, and is provided so that a smoke detection part cover 433 covers the center part. The top surface of the smoke detector cover 433 is a circular base 440. A net member 434 for preventing insects and the like from entering the smoke detection area 431 is provided on the outer peripheral surface portion of the smoke detection section cover 433. In addition, a speaker housing portion 432a for housing and fixing the speaker 418 is formed on the peripheral portion of the substrate portion 432.

FIG. 28 shows a cross-sectional view showing the inside of the smoke detector 430. A plurality of light shielding wall portions 441 are erected on the smoke detector cover 433 from the base portion 440 toward the substrate portion 432. As shown in this figure, the light shielding wall portion 441 of the smoke detecting section cover 433 has a single plate shape extending in one direction, and the entire circumference of the smoke detecting area 431 is surrounded by the plurality of light shielding wall portions 441. Surrounding. The direction in which the light shielding wall portion 441 extends is directed to both the circumferential direction and the radial direction of the smoke detection region 431. A gap is provided between the light shielding walls 441 so that smoke can enter the smoke detection area 431. On the other hand, one end 441a of the light shielding wall 441 and the other end 441b of the adjacent light shielding wall 441 are arranged so as to overlap each other in the circumferential direction.

An arcuate surface portion 441c that forms the outer peripheral surface of the smoke detection region 431 is formed on the outer peripheral surface of the one end portion 441a of the light shielding wall portion 441. The arcuate surface portion 441c forms an intermittent circumferential surface by the plurality of light shielding wall portions 441. Along the arcuate surface portion 441c, the mesh member 434 is arranged and fixed so as to form the outer peripheral surface of the smoke detecting portion cover 433.

Inside the smoke detection area 431, a light emitting unit 435 and a sensor unit 436 are arranged on the installation base 437. The light emitting unit 435 is configured by a laser diode, an infrared LED, or the like that can emit light, and is disposed so as to be directed toward the upper center side of the smoke detection region 431. The sensor unit 436 is disposed on the opposite side across the center of the smoke detection area 431 and faces the upper center side of the smoke detection area 431. The sensor unit 436 includes a photodiode that can detect light incident on the detection position 436a.

Since the light from the light emitting unit 435 is emitted obliquely above the sensor unit 436, the light is not detected by the sensor unit 436 in normal times. On the other hand, when smoke enters the smoke detection region 431, light from the light emitting unit 435 is scattered by the smoke, and a part of the light enters the detection position 436a of the sensor unit 436. Thereby, the sensor unit 436 can detect light and detect the presence of smoke.

The smoke detection region 431 is surrounded by a light shielding wall 441 so that light from the outside cannot enter, and the light shielding wall 441 is formed of a material that hardly reflects light. ing. However, the light shielding wall 441 facing the light emitting unit 435 directly receives strong light from the light emitting unit 435, so that part of the light is reflected. When the reflected light enters the sensor unit 436, there is a possibility that the sensor unit 436 detects the light even though no smoke is present. In order to prevent this, an uneven surface portion 441d is formed on the inner peripheral surface of the light shielding wall portion 441 that receives light from the light emitting portion 435. When light is reflected by the concave / convex surface portion 441d, the light is scattered by the concave / convex portion. Therefore, the amount of reflected light incident on the detection position 436a of the sensor portion 436 can be reduced, and malfunction can be prevented.

FIG. 29 shows an enlarged view of the vicinity of the smoke detection area 431 in FIG. Of the lines extending radially from the detection position 436a of the sensor unit 436, the line passing through the other end 441b of the light shielding wall 441 is located on the outer peripheral side of the light shielding wall 441 on the outer peripheral side of the light shielding wall 441. Intersects with one end 441a. For example, the broken line R <b> 1 passes through the other end 441 b of the light shielding wall 441 and extends to one end 441 a of the adjacent light shielding wall 441. The same applies to the broken line R2 and the broken line R3. The same applies to the light shielding wall portion 441 other than those indicated by the broken lines R1 to R3. In other words, one of the light shielding wall portions 441 is always located on the radiation centered on the detection position 436a of the sensor unit 436. As described above, the light shielding wall portion 441 is disposed so that light incident on the smoke detection region 431 from the outside does not directly reach the detection position 436a of the sensor unit 436.

Thus, the light shielding wall portions 441 are arranged so as to overlap in the radial direction so that any one of the light shielding wall portions 441 is positioned on the radiation centering on the detection position 436a of the sensor unit 436. The external light passing through the gap between the light shielding walls 441 does not directly reach the detection position 436a of the sensor unit 436, and the sensor unit 436 detects only the scattered light from the light emitting unit 435. Thus, malfunction of the sensor unit 436 due to external light can be reliably prevented. Further, the light shielding wall 441 can prevent external light from entering not only the detection position 436 a of the sensor unit 436 but also the central region of the smoke detection region 431. In the smoke detection region 431, when external light is incident on the region between the light emitting unit 435 and the sensor unit 436, the light is scattered by low-concentration smoke or the like, and the light is not directly incident on the detection position 436a of the sensor unit 436. However, since it may be incident on this indirectly and cause a malfunction, the incident of external light to the central area of the smoke detection area 431 is blocked by the light shielding wall portion 441, so that the malfunction can be prevented.

The light shielding wall portion 441 has a single plate shape extending in one direction, and the diameter of the smoke detecting portion cover 433 can be reduced by minimizing the overlapping of the light shielding wall portions 441 in the radial direction. it can. In FIG. 28, the speaker 418 housed in the speaker storage portion 432a is indicated by a broken line, but the speaker 418 and the light shielding wall portion 441 are arranged so as not to overlap in the thickness direction of the housing 410. For this reason, the sound from the speaker 418 is not blocked by the light shielding wall 441, and the sound pressure at the time of alarm can be sufficiently secured. Moreover, since the diameter of the smoke detector cover 433 can be reduced, the alarm device body 401 can be downsized.

Although the fourth embodiment of the present invention has been described above, the application of the present invention is not limited to the fourth embodiment, and can be applied in various ways within the scope of the technical idea.

[Embodiment 5]
(Basic concept of Embodiment 5)
First, the basic concept of the fifth embodiment will be described. The fifth embodiment generally relates to an alarm device that is attached to an installation surface of an installation object and has an attachment surface that faces the installation surface. Here, the “alarm device” is a device that performs an alarm, and specifically, a device that performs an alarm about a substance to be detected contained in the gas in the monitoring region. For example, a gas alarm, And a fire alarm (smoke alarm). The “monitoring area” is an area to be monitored, specifically, an area where an alarm device is installed. For example, an area in a house (for example, a room) or an area in a building other than a house It is a concept including Further, the “installation object” is an object on which the alarm device is installed, and examples thereof include a ceiling and a wall in the monitoring area. Further, the “installation surface” is a surface of an installation object on which the alarm device is installed. For example, a surface on the monitoring area side of the ceiling (that is, a lower surface of the ceiling), a surface on the monitoring area side of the wall (that is, , Interior side walls). Further, the “attachment surface” is a surface provided in the alarm device, and specifically, a surface attached to the installation surface in a state of facing the installation surface. The “substance to be detected” is a substance to be detected, specifically, a substance contained in a gas, and is a concept including, for example, carbon monoxide and smoke in the gas.

In the following embodiment 5, the “substance to be detected” is “smoke”, and the “alarm device” is a “fire alarm (smoke alarm)” that warns based on scattered light from smoke, ”Will be described as“ a room as an area in a house ”. As described above, the “installation target” includes “ceiling” or “wall”, and the case where the “installation target” is “ceiling” is illustrated below. The case where “thing” is “wall” will be described as appropriate.

(Constitution)
First, the configuration of the alarm device according to the fifth embodiment will be described. 30 is a perspective view of the alarm device according to the fifth embodiment, FIG. 31 is a bottom view of the alarm device, FIG. 32 is a side view of the alarm device, and FIG. FIG. 34 is a sectional view taken along arrow A, FIG. 34 is an exploded perspective view of the alarm device viewed from the lower side, and FIG. 35 is an exploded perspective view of the alarm device viewed from the upper side. In the following description, the XYZ directions shown in the drawings are directions orthogonal to each other. Specifically, the Z direction is the vertical direction (that is, the direction in which gravity acts), and the X direction and Assuming that the Y direction is a horizontal direction orthogonal to the vertical direction, for example, the Z direction is referred to as the height direction, the + Z direction is referred to as the upper side (plane), and the −Z direction is referred to as the lower side (bottom surface). explain. Further, the following terms relating to the “XYZ directions” are convenient expressions for explaining the relative positional relationship (or direction) of each component in the illustrated alarm device 5100. With reference to the center position of the detection space 534 of the case 502 in FIG. 33, the direction away from the detection space 534 is referred to as “outside”, and the direction approaching the detection space 534 is referred to as “inside”.

The alarm device 5100 shown in each of these figures is an alarm means for detecting and alarming smoke, which is a substance to be detected contained in the gas. Specifically, as shown in FIG. The installation surface 5900 which is the lower surface (that is, the −Z direction) (that is, the lower surface) or the installation surface (not shown) which is the monitoring region side surface (that is, the indoor side surface of the wall) of the monitoring region wall Specifically, it includes a mounting base 501, a case 502, a detection unit cover 503, a detection unit main body 504, and a circuit unit 50505 in FIG. 34. In the following, the installation surface 5900 extends in the direction along the XY plane (that is, the horizontal direction), and the “wall installation surface” (not shown) is orthogonal to the installation surface 5900 (that is, the vertical direction). The case where it spreads to will be described. In the following, after describing the overall configuration of the alarm device 5100, the details of each configuration will be described.

(Configuration-Mounting base)
First, FIG. 36 is a bottom view of the mounting base, and FIG. 37 is a plan view of the mounting base. The mounting base 501 shown in FIG. 32 is an attaching means for attaching the case 502 to the installation surface 5900 or a “wall installation surface” (not shown). Specifically, the case 502 and the installation surface 5900 or not shown. 36, the mounting hook 511 and the main body 512 shown in FIG. 36 are provided.

(Configuration-Mounting base-Mounting hook)
The attachment hook 511 in FIG. 36 is for attaching (that is, installing) the attachment base 501 to the installation surface 5900 or a “wall installation surface” (not shown), and specifically protrudes from the main body 512. For example, it is provided with a screw hole 5111. The screw hole 5111 is a hole through which a mounting screw (not shown) for mounting the mounting base 501 is inserted. Then, the mounting screw 501 is continuously inserted into the screw hole 5111 and the installation surface 5900 or a “wall installation surface” (not shown), whereby the attachment base 501 is installed on the installation surface 5900 or the “wall installation surface” (not shown). It becomes possible to attach to.

(Configuration-Mounting base-Body)
36 is a main body of the mounting base 501, for example, extends in the direction along the XY plane, has a disk shape with a predetermined diameter, and is formed integrally with the mounting hook 511. More specifically, a case-side facing surface 512A and an installation surface-side facing surface 512B of FIG. 37 are provided. As shown in FIG. 32, the case-side facing surface 512A in FIG. 36 is a surface to which the case 502 is attached in a state facing the case 502, and the installation surface-side facing surface 512B is in a state facing the installation surface 5900. It is an attachment surface attached to the installation surface 5900 (that is, an attachment surface spreading in a direction along the XY plane). The main body 512 includes a screw hole 5121 and an engaging portion 5122 as shown in FIG. The screw hole 5121 is a hole through which a mounting screw (not shown) for attaching the mounting base 501 to the installation surface 5900 is inserted. The attachment base 501 can be attached to the installation surface 5900 by continuously inserting the attachment screws through the insertion hole 121 and the installation surface 5900. 32 is an attaching means to which the case 502 of FIG. 32 is attached. Specifically, the engaging portion 5122 is engaged with an engaging portion 5214 of a back case 521 described later in FIG. The outer diameter of the main body 512 can be arbitrarily set. For example, it is assumed that the main body 512 is set to have the same size as the existing mounting base (for example, about 10 cm). explain.

(Configuration-Case)
Next, the case 502 in FIG. 32 is a storage unit that stores the detection unit cover 503, the detection unit main body 504, and the circuit unit 505 (hereinafter referred to as a storage object) in FIG. 34, specifically, the mounting base 501. In more detail, it is provided with a back case 521 and a front case 522 of FIG.

(Configuration-Case-Back Case)
FIG. 38 is a bottom view of the back case, FIG. 39 is a plan view of the back case, and FIG. 40 is a front view of the back case. As shown in FIG. 34, the back case 521 in each of these figures is a first housing means for housing “objects to be accommodated” from the mounting base 501 side (that is, the upper side (+ Z direction)), and is coupled to the front case 522. As a result, a gap is formed between the front case 522 as an external inflow opening 523 described later in FIG. Further, the back case 521 is an external guiding means that guides the gas moving outside the case 502 of FIG. 33 (including gas moving along the installation surface 5900) to the inside of the case 502, and It is an internal guiding means for guiding the gas moving inside the case 502 to a detection space 534 described later. Specifically, a gas flow path is formed between the case 502 and the detection unit main body 504.

The back case 521 of FIGS. 38 to 40 is, for example, spread in the direction along the XY plane and has a disk shape larger in diameter than the mounting base 501 (see “Back case 521 described later”). The inner case is also made of a resin that is integrally formed as a whole, and more specifically, includes a back case side facing wall 5211 and a back case side outer peripheral wall 5212. The back case-side facing wall 5211 in FIG. 33 forms a portion that expands in the direction along the XY plane in the back case 521, that is, faces the mounting base 501, and the guide recess 5211a in FIG. Is provided. The guiding recess 5211a is guiding means for guiding gas to the detection space 534 of FIG. 33, and details thereof will be described later. The back case side outer peripheral wall 5212 is a first outer wall that forms a portion (outer wall) extending in the height direction (Z direction) of the back case 521, and is outside the outer edge portion of the back case side facing wall 5211. And extends downward (−Z direction).

Further, the back case 521 of FIG. 38 is more specifically described in the component cases 5611 to 5616, the short fins 5621 to 5623, the

long fins

5631 and 5632, the

prevention pieces

5641 and 5642, and the ribs 5651 to 5659 (hereinafter referred to as “configuration”). Product cases 5611 to 5616, short fins 5621 to 5623,

long fins

5631 and 5632,

prevention pieces

5641 and 5642, and ribs 5651 to 5659 ”are collectively referred to as“ inner member of the back case 521 ”). First, the component cases 5611 to 5616 are accommodating means for accommodating components that constitute the alarm device 5100. Specifically, the component cases 5611 to 5616 are accommodations that divide the component accommodating space that is a space for accommodating the components. It has a wall. Further, the component case cases 5611 to 5616 (specifically, the housing walls of the component case cases 5611 to 5616) are guide means for guiding the gas to the detection space 534 in FIG. 33, and function as the guide means. It is provided in consideration of the arrangement location of the components. Further, the short fins 5621 to 5623 are guiding means for guiding the gas to the detection space 534 of FIG. 33, and specifically, are projecting pieces that protrude from the component case cases 5611 to 5623 of FIG. The

long fins

5631 and 5632 are guiding means for guiding the gas to the detection space 534 in FIG. 33. Specifically, the

long fins

5631 and 5632 are pieces extending from

ribs

5657 and 5659 in FIG. Is long enough. Further, the prevention pieces 5541 and 5642 are guiding means for guiding the gas to the detection space 534 in FIG. 33, and dust contained in the gas flowing into the inside through

slits

5213a and 5213b (to be described later in FIG. 38). These are prevention means for preventing entry into the detection space 534 of FIG. The ribs 5651 to 5659 in FIG. 38 are guiding means for guiding the gas to the detection space 534, and are reinforcing means for reinforcing the back case 521, and between the front case 522 and the back case 521 in FIG. 32 is a position determining means for determining the relative positional relationship in the height direction (Z direction) (that is, the width of the external inflow opening 523 in FIG. 32). Specifically, the external inflow opening 523 and the case 502 in FIG. For example, it is provided on the back case side facing wall 5211. The “width of the external inflow opening 523” indicates the distance from the upper end to the lower end of the external inflow opening 523. Further, in the following description, when it is not necessary to distinguish the ribs 5651 to 5659 from each other, they are collectively referred to as “ribs 565” as appropriate, and details of the “inner member of the back case 521” will be described later.

(Configuration-Case-Front Case)
FIG. 41 is a plan view of the front case, and FIG. 42 is a front view of the front case. As shown in FIG. 34, the front case 522 in each of these figures accommodates the “accommodation object” from the side opposite to the mounting base 501 side (ie, the lower side (+ Z direction)) with the “accommodation object” interposed therebetween. Specifically, the second housing means is connected to the back case 521 to form a gap as the external inflow opening 523 in FIG. Here, the “external inflow opening” 23 is inflow means for allowing gas outside the case 502 to flow into the case 502, and in particular, gas that moves along the installation surface 5900 outside the case 502 This is a first inflow opening that flows into the interior of 502, and is a gap formed between the back case 521 of the case 502 and the front case 522 so as to extend in the direction along the XY plane. The width of the external inflow opening 523 can be arbitrarily set in consideration of dust, ambient light, or the intrusion of the user's finger, the user's impression given by the appearance of the alarm device 5100, and the like. Here, for example, the following description will be made assuming that the distance is set to 3 to 5 (mm). Further, the front case 522 is an external guiding unit that guides the gas that moves outside the case 502 of FIG. 33 (including the gas that moves along the installation surface 5900) to the inside of the case 502.

The front case 522 of FIGS. 41 and 42 is, for example, spread in the direction along the XY plane, has a disk shape with a larger diameter than the back case 521, and is integrally formed as a whole. More specifically, a front case side exposed wall 5221 and a front case side outer peripheral wall 5222 are provided. First, the front case-side exposed wall 5221 forms a portion that extends in the direction along the XY plane of the front case 522, that is, is exposed so as to be mainly visually recognized by the user. 33 is a second outer wall that forms a portion (outer wall) extending in the height direction (Z direction) of the front case 522, and is an outer edge of the front case side exposed wall 5221. It extends toward the upper side (+ Z direction) while spreading outward from the portion.

Further, the front case 522 of FIG. 35 includes a push button 5223, a screw boss 5224, and a support portion 5225 in more detail. First, the push button 5223 is an operating means for operating the alarm device 5100. Specifically, the push button 5223 is for pressing a switch 5555 of a circuit unit 505 described later in FIG. 34 from the outside of the front case 522. Also, the screw boss 5224 in FIG. 35 is a position that defines the relative positional relationship in the height direction (Z direction) between the front case 522 and the back case 521 (that is, the width of the external inflow opening 523 in FIG. 32). 35 is a fixing means for fixing the front case 522 and the back case 521 of FIG. 35 to each other. Specifically, it is provided on the upper (+ Z) surface of the front case side exposed wall 5221. For example, a predetermined screw hole is provided, and a pillar shape standing in the height direction (Z direction) is exhibited. The support portion 5225 is a support means for supporting the detection portion main body 504. Specifically, a plurality of support portions 5225 are provided on the front case side outer peripheral wall 5222 side of the upper (+ Z) surface of the front case side exposed wall 5221. It is a protruding piece.

(Configuration-detector cover)
Next, FIG. 43 is a bottom view of the detection unit cover, and FIG. 44 is a front view of the detection unit cover in a state where the insect net is omitted. The detection unit cover 503 in each of these drawings is for detecting smoke using scattered light. Specifically, the detection unit cover 503 defines the detection space 534 of FIG. (+ Z). In addition, the detection part cover 503, the detection space 534, a part of the detection part main body 504, the light emission part 552 mentioned later, and the light-receiving part 553 correspond to a detection means. As shown in FIG. 34, the detection unit cover 503 has a cylindrical shape with one opening closed, and more specifically includes a ceiling plate 531, a labyrinth 532, and an insect net 533. Here, the “detection space” 534 in FIG. 33 is a space for detecting smoke. 34 covers the detection space 534. Specifically, the ceiling plate 531 is formed in a disk shape having a smaller diameter than the case 502, and a labyrinth 532 is integrally formed on the lower surface (−Z direction). Is formed. The labyrinth 532 is a partition wall that partitions the detection space 534. Specifically, the labyrinth 532 prevents disturbance light from entering the detection space 534. For example, as shown in FIG. Are provided along the line. By configuring in this way, an internal inflow opening 535 is formed between adjacent ones in the labyrinth 532. Here, the “inner inflow opening” 535 is a second inflow opening through which gas flows into the detection space 534, and is formed as a gap between the labyrinth 532. In the following, in order to distinguish each of the plurality of internal inflow openings 535, the letters “a”, “b”, etc. are added after the sign “535”, for example, “535a”, “535b”, etc. In the case where each of the plurality of internal inflow openings 535 is not distinguished, the description will be made using the reference numeral “535” (the same applies to the labyrinth 532). Returning to FIG. 34, the insect screen 533 is an insect control means that allows outside air to enter the detection space 534 through the small holes of the insect screen 533, while preventing insects from entering the detection space 534. The labyrinth 532 is formed in an annular shape surrounding the outer periphery of the labyrinth 532, and has a large number of small holes on the side surface that are difficult for insects to enter.

(Configuration-detection unit body)
Next, FIG. 45 is a bottom view of the detection unit main body, FIG. 46 is a plan view of the detection unit main body, and FIG. 47 is a front view of the detection unit main body. As shown in FIG. 33, the detection unit main body 504 in each of these figures is an arrangement unit that arranges the detection unit cover 503, and is a partition unit that partitions the detection space 534 together with the detection unit cover 503. The detection unit main body 504 is a covering unit that covers the circuit board 551, and is a covering unit in which the detection unit cover 503 is disposed on the opposite side of the circuit board 551 with the detection unit main body 504 interposed therebetween. Specifically, the gas flowing into the case 502 from the external inflow opening 523 is shielded from entering between the detection unit main body 504 and the front case 522, and then the gas flow path is formed between the back case 521 and the gas flow path. To form. The detection unit main body 504 extends from the detection unit cover 503 side in FIG. 33 to the external inflow opening 523 side in the direction along the XY plane, for example, as shown in FIG. 35 from the ceiling plate 531 of the detection unit cover 503. Is a slightly smaller diameter than the front case 522 and has a disk shape with a part cut away, and a part of the inner side is the lower side (the −Z direction). ) To the upper side (+ Z direction), and is made of a resin that is integrally formed as a whole. Note that “slightly smaller diameter than the front case 522” means that the diameter of the detection unit main body 504 is in contact with the front case side end 5222a from the inside as shown in FIG. It indicates that the “diameter” is enough to approach (or approach). The “detection main body side end” 5400a is an outer edge of the detection main body 504 and is an edge on the external inflow opening 523 side.

More specifically, the detection unit main body 504 of FIG. 35 includes the flange portion 541, the inclined portion 542, the raised portion 543, the detection portion main body notch portion 544, the speaker storage portion 545, and the element cover 546 of FIGS. Is provided. The flange portion 541 is a portion that extends in the direction along the XY plane closer to the outside in the detection portion main body 504 and includes a positioning recess 411. The positioning recess 411 is positioning means for positioning the rib 565 of the back case 521 with respect to the detection unit main body 504. Specifically, a plurality of positioning recesses 411 are provided on the outer edge portion of the flange portion 541. It is recessed from the (+ Z side) to the lower side (−Z side). In addition, the inclined portion 542 is a portion continuous from the flange portion 541, and in order to provide the detection space 534 in FIG. 33 above the external inflow opening 523 (+ Z direction), the flange portion 541 (direction along the XY plane). ) With respect to the upper side (+ Z direction). The raised portion 543 is a portion where the detection unit cover 503 is provided, and is located above the flange portion 541 (+ Z direction), and continuously extends from the inclined portion 542 in a direction along the XY plane. It is a part that. An arrangement recess 5431 in FIG. 35 is formed on the upper surface (+ Z direction) of the raised portion 543. The arrangement concave portion 5431 is a portion where the detection unit cover 503 is arranged. Specifically, the arrangement concave portion 5431 is a circular concave portion having a diameter corresponding to the outer diameter of the detection unit cover 503. Further, the detection unit main body cutout portion 544 is a portion cut out in a shape corresponding to the outer shape of the component case 5616 in order to provide a component case 5616 described later with respect to the alarm device 5100. In addition, the speaker storage unit 545 accommodates a speaker (not shown) between the detection unit main body 504 and the front case 522, so that the speaker storage unit 545 corresponds to the outer shape of the speaker to be stored from the lower side (the −Z direction) to the upper side. It is the part which protrudes toward (+ Z direction). The speaker is an output unit that outputs an alarm based on the amount of reflected light received by the light receiving unit 553. The specific form of the sound output from the speaker is arbitrary, and it is possible to output a synthesized sound generated as necessary, a sound recorded in advance, an alarm sound, or the like. The element cover 546 covers a light emitting unit 552 and a light receiving unit 553, which will be described later, in the circuit unit 505 from the upper side (+ Z direction), and prevents dust from accumulating on the light emitting unit 552 and the light receiving unit 553. The raised portion 543 is integrally formed with the arrangement concave portion 5431 near the center of the arrangement concave portion 5431. Details of the flange portion 541 and the speaker storage portion 545 will be described later.

(Configuration-Circuit part)
Next, FIG. 48 is a bottom view of the circuit unit, FIG. 49 is a plan view of the circuit unit, and FIG. 50 is a front view of the circuit unit. The circuit portion 505 in each of these figures is a circuit means for forming an electric circuit for performing an alarm. More specifically, the circuit board 551, the light emitting portion 552, the light receiving portion 553, the shield 554, the switch 555, and the power connector CN1 is provided. The circuit board 551 is a mounting means on which each element of the alarm device 5100 is mounted. In particular, the circuit board 551 is a board on which the light emitting unit 552 and the light receiving unit 553 are mounted. Specifically, the circuit board 551 is mounted on the upper side (+ Z direction). A through hole and the through hole at a predetermined position so that each element is mounted on the mounting surface (hereinafter referred to as the upper mounting surface) or the lower (−Z direction) mounting surface (hereinafter referred to as the lower mounting surface) using solder or the like. The terminal etc. which enclose is provided. Specifically, as shown in FIG. 33, the light emitting unit 552 is mounted on the upper mounting surface of the circuit board 551 so that it can emit light toward the detection space 534 provided above the light emitting unit 552 (+ Z direction). For example, a light emitting diode. The light receiving unit 553 is a light receiving unit that receives scattered light generated by the light emitted from the light emitting unit 552 being scattered by smoke particles. Specifically, the light receiving unit 553 is above the light receiving unit 553 (in the + Z direction). An element mounted on the upper mounting surface of the circuit board 551 so as to receive light from the provided detection space 534, for example, a photodiode. 50 is a shielding means for electromagnetically shielding the light receiving portion 553, and is a supporting means for supporting the light receiving portion 553 with respect to the circuit board 551, specifically, the circuit board 551. The conductive element mounted on the upper mounting surface of the metal, for example, is formed of metal. The switch 555 of FIG. 48 is an operating means for operating the alarm device 5100. Specifically, the switch 555 is an element mounted on the lower mounting surface of the circuit board 551, for example, a push switch. The power connector CN1 in FIG. 49 is a supply means for supplying a power supply voltage to the alarm device 5100, and specifically, a power supply voltage from a battery (not shown) as a power supply. Thus, the circuit board 551 is mounted on the upper mounting surface.

(Configuration-details)
Next, the configuration of the alarm device 5100 according to the fifth embodiment will be described in more detail. Specifically, the configuration of the detection unit main body 504, the circuit board 551, and the front case 522 will be described in detail.

(Configuration-Details-Detector body)
First, details of the flange portion 541, the battery holding spring 548, and the speaker storage portion 545 in the detection unit main body 504 will be described. FIG. 51 is an enlarged perspective view of the detection unit main body 504.

(Configuration-Details-Detector body-Flange)
The flange portion 541 is a flange for promoting the inflow of gas into the detection space 534, and is a flange formed integrally with the outer edge portion of the detection portion main body 504. Specifically, as shown in FIG. 33, the flange portion 541 extends to a position where it comes into contact with the inner peripheral surface of the front case 522, and the flange portion 541 and the outer edge of the detection unit main body 504 are connected to the front case. A gap between the inner peripheral surface of 522 is sealed. Thus, it is possible to prevent smoke from entering the space between the detection unit main body 504 and the front case 522 through the gap from the external inflow opening 523, and the amount of smoke flowing into the detection space 534 Can be increased. Note that the thickness, material, and the like of the flange portion 541 are arbitrary, and in the fifth embodiment, the flange portion 541 is formed of the same thickness and the same material (resin) as the other portions of the detection portion main body 504.

(Configuration-Details-Detector body-Battery holding spring)
The battery holding spring 548 is a power source biasing unit for biasing and holding the power source unit that supplies power to the alarm device 5100 and is a power source biasing unit that is integrally formed with the detection unit main body 504. Specifically, as shown in the drawing, the battery holding spring 548 has a predetermined interval along the edge of the detection unit main body notch 544 on the lower surface (−Z direction) of the detection unit main body 504. It is formed in two places. Here, the battery holding spring 548 protrudes downward (−Z direction) from the arrangement location, and then bends outward (−X direction) and then protrudes upward (+ Z direction). The power supply unit is configured to be energized from the detection unit main body notch 544 to the outside (−X direction). The space between the base portion and the tip portion of the battery holding spring 548 will be described as “biasing space” 549 below.

Here, as shown in FIG. 34, FIG. 35, and FIG. 38, the component case 5616 of the back case 521 is notched downward (−Z direction) at a position corresponding to the battery holding spring 548 described above. Two component case cutouts 5617 are provided. The component case notch 5617 is not provided through the height direction (Z direction), and is a notch about half the height of the component case 5616. Note that a portion above the component case notch 5617 (+ Z direction) in the component case 5616 is referred to as a “stopper portion” 5618 below.

When the back case 521 and the detection unit main body 504 are combined, the battery holding spring 548 is inserted into the component case notch 5617, and the stopper portion 5618 is interposed in the biasing space 549 of the battery holding spring 548. To do. Since the stopper portion 5618 is interposed in the biasing space 549 in this way, the inward direction (+ X direction) of the battery holding spring 548 is restricted by the stopper portion 5618. Therefore, the battery holding spring is stored when the battery is stored. It can be prevented that 548 is plastically deformed due to excessive bending. As described above, in the fifth embodiment, the battery holding spring 548 is not provided in the back case 521 integrally with the stopper portion 5618 but is provided in the detection portion main body 504 configured to be separated from the back case 521. Therefore, compared to the case where the battery holding spring 548 is provided in the component case 5616 of the back case 521, the tip position (position of the −X direction end) of the battery holding spring 548 can be suppressed to the inside (+ X direction). The component case 5616 can be downsized. In this manner, the component case 5616, which is a component that hinders the airflow into the detection space 534, can be miniaturized, so that the inflow of airflow into the detection space 534 can be increased and the detection accuracy can be improved. In addition, by forming a part such as the battery holding spring 548 that is always subjected to stress from the battery when the battery is housed in the detection unit main body 504 that cannot be visually recognized from the outside, the battery holding spring 548 is formed in the case 502. Appearance defects associated with deformation based on the stress can be prevented.

(Configuration-Details-Detector body-Speaker compartment)
The speaker storage unit 545 is a storage unit that stores a speaker that outputs an alarm, and is a storage unit that is integrally formed with the detection unit main body 504. The speaker housing portion 545 is a plate-like member that protrudes downward (−Z direction) and is formed at a position corresponding to the speaker in the detection unit main body 504, and has a circular inner diameter that is slightly larger than the outer shape of the speaker. An annular member. Here, “slightly large” is arbitrary as long as it is at least large enough to accommodate a speaker. For example, a gap of several millimeters is formed between the outer periphery of the speaker and the inner periphery of the speaker storage portion 545. The size may be as large as possible. Here, a plurality of speaker holes are formed at the position where the speaker storage unit 545 is formed in the detection unit main body 504, as shown in FIG. 50, and an alarm sound emitted from the speaker is transmitted through the speaker hole. Thus, it also flows upward (in the + Z direction).

(Configuration-details-placement recess)
Next, details of the periphery of the arrangement recess 5431 in the detection unit main body 504 will be described. 52 is a cross-sectional view taken along the line BB in FIG. 32, and FIG. 53 is a cross-sectional view taken along the line CC in FIG. As shown in FIGS. 52 and 53 and FIGS. 45 to 47 described above, on the upper surface (the surface on the + Z side) of the detection unit main body 504, a light emitting depression 5432, a light receiving depression 5433, A groove portion 5434 and an outer edge wall 5435 are provided, and as shown in FIG. 51 described above, the lower surface (surface facing the circuit board 551, surface on the −Z side) of the detection portion main body 504. Is provided with a light-shielding frame portion 5438. In FIG. 53, the optical axis of the light emitting unit 552 is illustrated by a one-dot chain line, and the optical axis of the light receiving unit 553 is illustrated by a two-dot chain line.

(Configuration-Details-Arrangement recess-Light emission recess)
The light emission recess portion 5432 is a detection accuracy decrease suppression unit that suppresses a decrease in detection accuracy due to dust being positioned on the optical axis of the light emission portion 552. Specifically, the light emitting depression 5432 is a depression formed integrally with the arrangement recess 5431 at a position closer to the light emission part 552 than the center of the arrangement depression 5431, and the specific shape is arbitrary. In the fifth embodiment, as shown in FIG. 53, a hollow having a trapezoidal cross-sectional view whose outermost surface is an inclined surface is presented.

Here, a light emitting hole 5436 penetrating the detection unit main body 504 is formed in the slope portion. The light emitting hole 5436 is a hole for introducing light from the light emitting unit 552 through the detection unit main body 504 to the detection space 534. Specifically, it is a hole provided on the optical axis of the light-emitting portion 552 in the light-emitting depression portion 5432 and is formed so as to penetrate the slope of the light-emitting depression portion 5432. The size and shape of the diameter of the light emitting hole 5436 are arbitrary as long as the light from the light emitting unit 552 can be introduced into the detection space 534. For example, experiments and analyzes are performed based on the projection angle, the amount of light, and the like of the light from the light emitting unit 552. An appropriate size and shape can be determined by such as.

Returning to the description of the light emitting depression 5432, the light emitting depression 5432 is provided in this way, and the inner side (right side in FIG. 53) of the light emitting hole 5436 is recessed, so that dust is deposited on the bottom surface of the light emitting depression 5432. Even if some accumulation occurs, the accumulated dust does not lie on the optical axis until the accumulated dust reaches the height of the light emitting hole 5436. Therefore, it is possible to suppress a decrease in detection accuracy due to the dust being positioned on the optical axis of the light emitting unit 552. Here, the depth of the light emitting depression 5432 is preferably as deep as possible in order to prevent a decrease in detection accuracy due to accumulation of dust. In other words, if the light emitting depression 5432 is shallow, only a slight accumulation of dust on the bottom surface of the light emitting depression 5432 causes the dust to be positioned on the optical axis of the light emitting portion 552, and the light is reflected by the dust. Although smoke may be erroneously detected, such a situation can be prevented by deepening the light emitting depression 5432 so that a large amount of dust can be accumulated. However, when the depth is too deep, the entire thickness of the detection unit main body 504 is increased, and as a result, the entire alarm device 5100 is increased in size. In addition, in this Embodiment 5, the hollow about 3 mm deep is exhibited.

(Structure-Details-Placement recess-Light receiving recess)
The light receiving dent 5433 is a detection accuracy lowering suppression unit that suppresses a decrease in detection accuracy due to dust being positioned on the optical axis of the light receiving unit 553. Specifically, the light receiving depression 5433 is a depression formed integrally with the arrangement concave portion 5431 at a position closer to the light receiving portion 553 than the center of the arrangement concave portion 5431, and the specific shape is arbitrary. In the fifth embodiment, as shown in FIG. 50, a hollow having a trapezoidal cross-sectional view in which the outermost surface is an inclined surface is presented.

Here, a light receiving hole 5437 is formed in the slope portion. The light receiving hole 5437 is a hole for introducing light from the detection space 534 through the detection unit main body 504 to the light receiving unit 553. Specifically, it is a hole provided on the optical axis of the light receiving part 553 in the light receiving hollow part 5433, and is formed so as to penetrate the slope of the light receiving hollow part 5433. The diameter and shape of the light receiving hole 5437 are arbitrary as long as light can be introduced into the light receiving portion 553. For example, a lens portion provided on the surface of the light receiving portion 553 on the detection space 534 side and having a light collecting function. You may form with the same magnitude | size and shape as (sign abbreviation).

Returning to the description of the light receiving depression 5433, the light receiving depression 5433 is provided in this way, and the inner side of the light receiving hole 5437 (left side in FIG. 53) is depressed, so that dust is deposited on the bottom surface of the light receiving depression 5433. Even if some accumulation occurs, the accumulated dust does not lie on the optical axis until the height of the light receiving hole 5437 is reached. For this reason, it is possible to suppress a decrease in detection accuracy due to the dust being positioned on the optical axis of the light receiving unit 553. Here, the depth of the light receiving depression 5433 is preferably as deep as possible in order to prevent a decrease in detection accuracy due to accumulation of dust, like the light emitting depression 5432 described above. In addition, in this Embodiment 5, the hollow about 3 mm deep is exhibited.

(Configuration-details-placement recess-groove)
The groove portion 5434 is a groove portion 5434 formed around the light emitting hole 5436 and the light receiving hole 5437 on the surface of the detection unit main body 504 facing the detection space 534, and is a groove recessed toward the opposite side of the detection space 534. is there. Specifically, the groove portion 5434 is a groove that is formed integrally with the placement recess portion 5431 so as to cover the periphery of the light emission recess portion 5432 and the light reception recess portion 5433, and is further formed than the placement recess portion 5431. This is a portion that is lowered by one step toward the side opposite to the detection space 534 (that is, the lower side). By providing the groove portion 5434 that is one step lower in the arrangement concave portion 5431 in this way, dust that has entered the detection space 534 accumulates in the groove portion 5434, so that the dust is accumulated on the surface of the element cover 546. Can be prevented. Therefore, it is possible to prevent a situation in which the detection accuracy is lowered due to the accumulated dust being positioned on the optical axis of the light emitting unit 552 and the light receiving unit 553. The depth of the groove 5434 is arbitrary, but may be, for example, a depth of about 1 mm to 2 mm.

(Configuration-details-placement recess-outer edge wall)
The outer edge wall 5435 is a wall portion raised from the detection unit main body 504 toward the detection space 534 around the light emission depression 5432 and the light reception depression 5433 on the surface of the detection main body 504 on the detection space 534 side. . Specifically, the outer edge wall 5435 is a resin wall provided on the surface of the groove 5434, and extends along the outer edge of the light emitting depression 5432 and the light receiving depression 5433 on the attachment surface side (that is, the upper surface side). It is a formed wall. The thickness of the outer edge wall 5435 is arbitrary as long as sufficient strength can be maintained. In the fifth embodiment, a plate-like body having a thickness of about 1 mm is presented. The height of the outer edge wall 5435 is arbitrary as long as it does not interfere with the optical axis. For example, in the fifth embodiment, the outer edge wall 5435 is formed to have a uniform height of about 1.5 mm. It may be formed.

By providing the outer edge wall 5435 in this manner, the outer edge wall 5435 is positioned between the light emitting portion 552 and the light receiving portion 553 as shown in FIG. 53, and therefore the light is received by the light receiving portion 553 directly without passing through the detection space 534. Can be prevented and erroneous detection can be prevented. Further, the outer edge wall 5435 can prevent the dust accumulated in the groove portion 5434 from dropping to the light emitting portion 552 and the light receiving portion 553 through the light emitting hole 5436 and the light receiving hole 5437, and the light emitting portion 552 and the light receiving portion 553. It is possible to prevent a decrease in detection accuracy due to the accumulation of dust on the surface. Further, dust accumulated in the groove portion 5434 can be prevented from dropping and accumulating from the groove portion 5434 to the bottom surface of the light emitting depression portion 5432 and the bottom surface of the light receiving depression portion 5433. It is possible to prevent a decrease in detection accuracy due to the dust accumulated on the bottom surface of the light being positioned on the optical axis of the light emitting unit 552 and the light receiving unit 553.

(Configuration-Details-Placement recess-Shading frame)
The light shielding frame portion 5438 is light shielding means formed around the light emitting hole 5436 or the light receiving hole 5437 on the surface of the detection unit main body 504 facing the circuit board 551, and is disposed so as to be raised toward the substrate. , A light shielding unit that covers the periphery of the light emitting unit 552 and the light receiving unit 553. Specifically, the light shielding frame portion 5438 is a frame-like body having a lower surface as an open surface, and is formed so as to protrude downward from the lower surface (surface in the −Z direction) of the detection portion main body 504. When the detection unit main body 504 and the circuit board 551 are combined, the light emitting unit 552 and the light receiving unit 553 attached to the circuit board 551 are accommodated in the light shielding frame unit 5438, and the light emitting unit 552 and the light receiving unit 552 are received. It arrange | positions so that front and rear, right and left of the part 553 may be covered.

Thus, by covering the light emitting unit 552 and the light receiving unit 553 with the light shielding frame 5438, the light receiving unit 553 detects the light from the light emitting unit 552 without going through the detection space 534 (that is, around the detection unit main body 504). The light can be prevented from reaching, and the light can be transmitted to the correct route (the light from the light emitting unit 552 reaches the light receiving unit 553 sequentially through the light emitting hole 5436, the detection space 534, and the light receiving hole 5437). False detection can be prevented. In the fifth embodiment, the light shielding frame portion 5438 has a shape that covers both the light emitting portion 552 and the light receiving portion 553. However, the present invention is not limited to this, and may have a shape that covers only one of them.

(Configuration-Details-Circuit board)
Next, details of the circuit board 551 will be described. FIG. 54 is a perspective view of the circuit board 551. As shown in FIG. 54, the circuit board 551 generally includes a light emitting unit 552, a light receiving unit 553, a shield 554, and a substrate hole 556.

First, the light emitting unit 552 is a light emitting means (light emission side detection means) that emits light to the detection space 534, and is a light projecting means that projects light in a direction toward the mounting surface of the alarm device 5100. It is formed as a light emitting diode, and is mounted on the circuit board 551 in a state where two connection lines (legs) are bent at a predetermined angle, thereby determining an optical axis at a predetermined angle.

The light receiving unit 553 is a light receiving unit that receives reflected light of the light projected from the light emitting unit 552 to the detection space 534, and whether or not a substance to be detected is included based on the amount of light received. This is a light receiving means (light receiving side detecting means) for detecting the above, and is formed as a known photodiode and is integrally formed with the shield 554.

The shield 554 is noise prevention means for preventing noise to the light receiving unit 553, and is formed integrally with the light receiving unit 553 so that the light receiving unit 553 is directed in a predetermined direction. This is a noise prevention means for determining the axis. Specifically, the shield 554 is disposed on the upper surface (+ Z direction) of the circuit board 551 so as to face the light emitting unit 552. The bottom surface of the shield 554 is parallel to the circuit board 551, and the shield A surface on the side facing the light emitting unit 552 in 554 is an inclined surface (surface on which the light receiving unit 553 is mounted) inclined by a predetermined angle from the vertical, and the bottom surface and the inclined surface form an acute angle. That is, when the shield 554 is mounted on the circuit board 551, the optical axis of the light receiving unit 553 is determined by the shape of the shield 554.

The substrate hole 556 is a hole provided at a position corresponding to the bent portion of the light emitting unit 552, and an optical axis adjustment pin 5701 for determining the mounting angle of the light emitting unit 552 with respect to the circuit board 551 is inserted. It is a possible hole. Specifically, the substrate hole 556 is a hole formed on the light receiving unit 553 side from the attachment position of the connection line of the light emitting unit 552, and the shape and diameter of the hole is as long as the optical axis adjustment pin 5701 can be inserted. Although it is optional, the fifth embodiment is a circular hole having a diameter of about 5 mm. Here, the “optical axis adjusting pin” 5701 is an angle determining instrument used when determining the mounting angle of the light emitting unit 552 with respect to the circuit board 551, and is a concept including, for example, an arbitrary bar-shaped jig. Since the surface of the light emitting portion 552 facing the substrate hole 556 is a curved surface, the tip of the optical axis adjustment pin 5701 is a concave surface corresponding to the curved surface so that the light emitting portion 552 can be easily held. Is preferred.

(Configuration-Details-Table case)
Next, details of the front case 522 will be described. Here, on the upper surface (the surface on the + Z direction side) of the front case 522, a closing protrusion 5226 (see FIGS. 35 and 41) protruding upward (+ Z direction) is formed. The closing protrusion 5226 is a closing unit that closes the substrate hole 556 in a state where the light emitting unit 552, the light receiving unit 553, and the detection unit main body 504 are accommodated, and is a supporting unit that can support the light emitting unit 552. Specifically, the closing protrusion 5226 is provided at a position corresponding to the board hole 556 of the circuit board 551 in the front case 522 (a position directly below the board hole 556 (−Z direction)). It is a protrusion which has a diameter which can be inserted in to. Here, “insertable” means that the outer diameter is smaller than the inner diameter of the substrate hole 556, but the outer diameter is preferably close to the inner diameter of the substrate hole 556. Thus, by closing the substrate hole 556 with the closing protrusion 5226, it is possible to prevent the light from the light emitting portion 552 from passing around the substrate substrate 551 (−Z direction) through the substrate hole 556, and to the light receiving portion. It is possible to reduce the possibility that 553 receives the wraparound light and erroneously detects the generation of smoke. Further, in the case where visible light is used as the light emitted from the light emitting portion 552, appearance defects associated with the visible light being transferred to the front case 522 through the substrate hole 556 can be prevented.

Here, the height of the closing projection 5226 (the length in the Z direction) is at least long enough to allow the end of the closing projection 5226 to be inserted into the board hole 556 when the circuit board 551 is installed in the front case 522. Although it is arbitrary as long as it has, it is more preferable if it is the length which can support the light emission part 552. “Supporting the light emitting unit 552” indicates that supporting the light emitting unit 552 can prevent the connection line of the light emitting unit 552 from being bent when an impact or the like is applied to the light emitting unit 552. For example, the front end of the blocking projection 5226 interferes with the light emitting unit 552, so that the light emitting unit 552 is fixedly supported, or the front end of the closing projection 5226 does not interfere with the light emitting unit 552, and the light emitting unit 552 This includes preventing the light-emitting portion 552 from bending beyond the allowable range by being positioned slightly below (−Z direction). Note that the tip shape of the blocking protrusion 5226 is arbitrary, and may have a concave shape corresponding to the curved surface shape so as to easily support the light emitting portion 552 having a curved shape, for example.

(Mounting method on circuit board)
Next, a mounting method for mounting the light emitting unit 552, the light receiving unit 553, and the shield 554 on the circuit board 551 in the fifth embodiment will be described.

First, the configuration of the mounting jig 5700 used for the mounting method will be briefly described. FIG. 55 is a cross-sectional view showing the circuit board 551 and the mounting jig 5700. As shown in FIG. 55, the mounting jig 5700 includes a base 5710 and an upper lid 5720, and is configured such that a circuit board 551 can be interposed between the base 5710 and the upper lid 5720.

First, the configuration of the base 5710 will be described. The base 5710 includes a light emitting portion pocket 5711 and a light receiving portion pocket 5712.

The light emitting portion pocket 5711 is a recess having a size and shape that can accommodate the light emitting portion 552. In the state where the light emitting portion 552 is accommodated in the light emitting portion pocket 5711, the positional relationship between the light emitting portion 552 and the circuit board 551 is as follows. The positional relationship when the light emitting unit 552 is finally mounted on the circuit board 551 is obtained. Here, the bottom surface (the end surface in the + Z direction) of the light emitting unit pocket 5711 has an inclined shape with an angle corresponding to the bending angle of the connection line of the light emitting unit 552 (an angle parallel to the optical axis of the light emitting unit 552). . The reason for having such a slope shape will be described later.

The light receiving portion pocket 5712 is a recess having a size and shape that can accommodate the shield 554 in which the light receiving portion 553 is integrally formed. In the state where the light receiving portion 553 (and the shield 554) is received in the light receiving portion pocket 5712, The positional relationship between the light receiving unit 553 and the circuit board 551 is the positional relationship when the light receiving unit 553 is finally mounted on the circuit board 551. Here, the bottom surface (the end surface in the + Z direction) of the light receiving portion pocket 5712 has an inclined surface shape having an angle corresponding to the inclination angle of the shield 554. The reason for having such a slope shape will be described later.

Here, in a state where the light receiving portion 553 is accommodated in the light receiving portion pocket 5712, the light receiving portion 553 is pressed against the circuit board 551. Specifically, the base 5710 is provided with an urging hole 5716, and a sliding member 5713 is slidably stored in the urging hole 5716. The light receiving portion pocket 5712 includes the sliding member 5712. It is formed at the −Z direction end of 5713. A spring 5714 is disposed on the bottom surface (+ Z direction end surface) of the urging hole 5716 to urge the slide member 5713 in the direction toward the circuit board 551 (−Z direction). The light receiving part 553 accommodated in the part pocket 5712 is pressed against the circuit board 551. The specific method of pressing the light receiving portion 553 against the circuit board 551 is not limited to this, and for example, an elastic member such as rubber may be applied instead of the spring 5714 described above.

Next, the configuration of the upper lid 5720 will be described. The upper lid 5720 is attached to the base 5710 so as to be rotatable about one end as a base point. In addition, an exposure hole 5721 having a planar shape slightly smaller than the circuit board 551 is provided in the center portion of the upper cover 5720 in plan view. When the upper cover 5720 is closed, the circuit board is interposed through the exposure hole 5721. The vicinity of the center of 551 (the portion including the light emitting portion pocket 5711 and the light receiving portion pocket 5712 described above) is exposed to the outside (see FIG. 59 and the like described later), and the outer edge portion of the circuit board 551 is held down and fixed by the upper lid 5720. .

A mounting method using the mounting jig 5700 as described above will be described below. FIG. 56 is a perspective view showing the mounting jig 5700 in the initial state. In this state, the upper lid 5720 is open. FIG. 57 is a perspective view showing the mounting jig 5700 in a state where the light emitting unit 552, the light receiving unit 553, and the shield 554 are arranged on the mounting jig 5700. As described above, first, the light emitting unit 552 is accommodated in the light emitting unit pocket 5711, and the shield 554 (the shield 554 in which the light receiving unit 553 is integrally formed) is accommodated in the light receiving unit pocket 5712. Here, the light emitting unit 552 is accommodated in advance in a state where the connection line of the light emitting unit 552 is bent at a predetermined angle using another known jig (forming jig or the like). As described above, the bottom surface (the end surface in the + Z direction) of the light emitting portion pocket 5711 has a slope shape, and when the light emitting portion 552 is accommodated, the light emitting portion 552 is arranged at a predetermined angle. Since the angle of the slope of the bottom surface (+ Z direction end face) corresponds to the bending angle of the connection line, the connection line of the light emitting part 552 is arranged along the vertical direction in a state where the light emitting part 552 is accommodated. Further, the + Z direction end portion of the shield 554 has a slope shape as described above, and the bottom surface (+ Z direction end surface) of the light receiving portion pocket 5712 has a slope shape corresponding to this shape, so that the shield 554 is accommodated. In this case, the end face (end face in the −Z direction) of the shield 554 on the circuit board 551 side becomes horizontal so as to follow the circuit board 551.

Subsequently, the circuit board 551 is placed on the base 5710 of the mounting jig 5700 (the light emitting portion 552 and the light receiving portion 553 for detecting whether or not the substance to be detected is contained in the gas flowing into the detection space 534, (Attaching step for attaching the element to the circuit board 551 on which the element can be mounted) at a predetermined angle). FIG. 58 is a perspective view showing the mounting jig 5700 with the circuit board 551 mounted thereon. Here, a positioning protrusion 5715 is formed on the mounting jig 5700, and the circuit board 551 is placed so that the positioning protrusion 5715 penetrates the positioning hole 557 formed in the circuit board 551. Thus, the position of the circuit board 551 with respect to the base 5710 can be uniquely determined. At this time, the connection lines of the light emitting unit 552, the shield 554, and the light receiving unit 553 are inserted into the through holes provided in the circuit board 551.

Subsequently, the upper lid 5720 is closed and the circuit board 551 is fixed. FIG. 59 is a perspective view showing a mounting jig 5700 in which the upper lid 5720 is closed. In order to prevent the circuit board 551 from further moving, the upper lid 5720 may be held down with a known pin or the like.

Finally, in the state shown in FIG. 59, the light emitting portion 552, the light receiving portion 553, and the shield 554 are electrically mounted on the circuit board 551 (the light emitting portion 552 and the light receiving portion 553 attached to the circuit board 551 in the attaching step). Is mounted on the circuit board 551 while maintaining a predetermined angle (an angle at the time of attachment)). As shown in the drawing, a part of the circuit board 551 is exposed through the exposure hole 5721 of the upper lid 5720, so that the circuit board 551 can be soldered directly even when the upper lid 5720 is closed. Specifically, first, an optical axis adjustment pin 5701 (see FIG. 55) is inserted into a board hole 556 provided in the circuit board 551, and the light emitting part 552 is fixed to the end face of the light emitting part pocket 5711 in the + Z direction. In this state, the connection line of the light emitting portion 552 protruding from the through hole of the circuit board 551 is soldered to the circuit board 551 for mounting. As described above, the light emitting unit 552 is held in the light emitting unit pocket 5711 obliquely by the force pressed by the optical axis adjusting pin 5701, whereby the installation position and the angle are uniquely determined. Subsequently, the connection line of the light receiving portion 553 protruding from the through hole of the circuit board 551 is soldered to the circuit board 551 and mounted. The light receiving unit 553 is uniquely determined with respect to the circuit board 551 by being pressed against the circuit board 551 by the biasing force in the −Z direction as described above.

This completes the description of the mounting method for mounting the light emitting unit 552, the light receiving unit 553, and the shield 554 on the circuit board 551. And the detection part main body 504 interposed between the circuit board 551 and the detection space 534 is installed so that the circuit board 551 and the light emission part 552 and the light-receiving part 553 mounted in the circuit board 551 may be covered (covering). The alarm device 5100 can be manufactured by housing each part between the case 502 and the means installation step (see FIG. 35, etc.).

(Effect of Embodiment 5)
Thus, according to the fifth embodiment, since the detection unit main body 504 does not interfere with the circuit board 551, the light emitting unit 552, and the light receiving unit 553, the light emitting unit 552 and the light receiving unit 553 are set in the detection unit main body 504. Then, the work of covering the detection unit main body 504 with the circuit board 551 and simultaneously inserting the connection lines of the light emitting unit 552 and the light receiving unit 553 into the through holes of the circuit board 551 can be omitted, and the light emitting unit 552 and the light receiving unit 553 are mounted. The operation can be simplified, and it is not necessary to provide a mechanism for attaching the light emitting unit 552 and the light receiving unit 553 in the detection unit main body 504, and the mechanism of the detection unit main body 504 is simplified to increase the productivity of the alarm device 5100. It becomes possible to improve.

Further, since the detection means includes the light receiving portion 553 and the shield 554 is formed integrally with the light receiving portion 553, the mounting work of the light receiving portion 553 and the shield 554 can be simplified, and the light receiving portion is attached to the detection portion main body 504. It is not necessary to provide a mechanism for attaching 553 and the shield 554 to the detection unit main body 504, and the mechanism of the detection unit main body 504 can be simplified to improve the productivity of the alarm device 5100.

Further, since the flange portion 541 for promoting the inflow of gas into the detection space 534 is provided at the outer edge of the detection unit main body 504, the amount of gas inflow into the detection space 534 can be increased, and the detection accuracy can be improved. It becomes possible.

In addition, since the battery holding spring 548 to which the stress from the power supply unit always acts is integrally formed with the detection unit main body 504 that cannot be visually recognized from the outside, it is compared with the case where it is provided in a mechanism that can be visually recognized from the outside such as the case 502. Therefore, the deformation due to the stress becomes inconspicuous and appearance defects can be prevented.

In addition, since the speaker housing portion 545 for housing the speaker connected to the circuit board 551 is formed integrally with the detection portion main body 504, output means can be arranged on the same surface side as the circuit board 551 in the detection portion main body 504. Connection to the circuit board 551 can be simplified and the productivity of the alarm device 5100 can be improved.

Further, since the circuit board 551 is provided with the board hole 556 into which the optical axis adjustment pin 5701 can be inserted, the mounting angle of the light emitting part 552 can be adjusted by an extremely easy method of inserting the optical axis adjustment pin 5701 and suppressing the light emitting part 552. This can be easily determined, and the productivity of the alarm device 5100 can be improved.

In addition, since the case 502 includes the closing protrusion 5226 that closes the substrate hole 556, it is possible to prevent erroneous detection due to the light of the light emitting portion 552 going around the substrate hole 556 and being received by the light receiving portion 553. Detection accuracy can be improved.

In addition, since the closing protrusion 5226 can support the light emitting unit 552, when an external force is applied to the light emitting unit 552 for some reason, the angle of the light emitting unit 552 changes and the detection accuracy decreases. It becomes possible to prevent.

In addition, since the detection unit main body 504 includes the light emitting hole 5436 and the light receiving hole 5437, the detection unit main body 504 covers the circuit board 551 and suppresses the accumulation of dust on the circuit board 551, and the light emitting hole 5436 and the light receiving hole. The optical axis of the light emitting unit 552 and the light receiving unit 553 can be prevented from being obstructed by 5437.

Further, since the groove portion 5434 that is recessed toward the opposite side of the detection space 534 is provided around the light emitting hole 5436 and the light receiving hole 5437, dust is accumulated on the detection portion main body 504 by accumulating dust in the groove portion 5434. Accumulation can be prevented, and dust accumulated around the light emitting hole 5436 or the light receiving hole 5437 in the detection unit main body 504 is positioned on the light emitting axis or the light receiving axis, and the detection accuracy decreases. Can be prevented.

Further, the light-emitting portion 552 is arranged so as to rise around the light-emitting hole 5436 or the light-receiving hole 5437 and includes the light-shielding frame portion 435 that covers the periphery of the light-emitting portion 552 or the light-receiving portion 553, so In addition, it is possible to prevent erroneous detection due to light being directly received by the light receiving unit 553 without passing through the light source, and dust accumulated in the detection unit main body 504 is transmitted from the detection unit main body 504 through the light emitting hole 5436 and the light receiving hole 5437. It is possible to prevent a situation in which the detection accuracy is lowered by falling to 552 or the light receiving unit 553 and accumulating on the surface of the light emitting unit 552 or the light receiving unit 553.

In addition, since the detection unit main body 504 is installed after the light emitting unit 552 and the light receiving unit 553 are attached to the circuit board 551 and electrically mounted, the light emitting unit 552 and the light receiving unit 553 are set in the detection unit main body 504. From this, it is possible to omit the work of covering the detection unit main body 504 with the circuit board 551 and simultaneously inserting the connection lines of the light emitting unit 552 and the light receiving unit 553 into the through holes of the circuit board 551, and mounting the light emitting unit 552 and the light receiving unit 553. It is not necessary to provide a mechanism for attaching the light emitting unit 552 and the light receiving unit 553 in the detection unit main body 504, and the mechanism of the detection unit main body 504 is simplified to improve the productivity of the alarm device 5100. It becomes possible to do.

(Modification to Embodiment 5)
Although the fifth embodiment according to the present invention has been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may vary depending on the implementation environment and the details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved.

(About distribution and integration)
The above-described configuration is functionally conceptual and does not necessarily need to be physically configured as illustrated. In other words, the specific forms of distribution and integration of the respective units are not limited to those shown in the drawings, and all or a part thereof can be configured to be functionally or physically distributed or integrated in arbitrary units. For example, the case 502 and the attachment base 501 of the alarm device 5100 may be integrally configured, and the integrated configuration may be directly attached to the installation surface of the monitoring area.

(About the optical axis adjustment pin)
In the fifth embodiment, the optical axis adjustment pin 5701 is inserted into the substrate hole 556 to fix the light emitting unit 552, and soldering is performed in the fixed state, and then the optical axis adjustment pin 5701 is removed. However, the optical axis adjusting pin 5701 may be bonded to the circuit board 551 by a known method.

(About mounting jig)
In the fifth embodiment, the mounting jig 5700 has a structure in which the upper cover 5720 is rotatably attached to the base 5710 and the circuit board 551 is sandwiched between the base 5710 and the upper cover 5720, but the circuit board 551 can be fixed. However, the upper lid 5720 may be omitted, and a member (for example, a hook or the like) that can fix the circuit board 551 to the base 5710 may be provided, or the circuit board 551 may be mounted on the base 5710. The circuit board 551 may be fitted into the base 5710 and fixed with screws or bolts.

Embodiment 1
DESCRIPTION OF SYMBOLS 1 Alarm body 2 Mounting plate 10 Case 11 Front surface 12 Smoke inlet 13 Operation button 14 Sound hole 15 Mounting plate fixing | fixed part 16 Battery storage part 17 Battery 20 Alarm fixing surface part 21 Upper protrusion part 22 Screw hole part 22a Insertion part 22b Slide portion 23 Rising portion 24 Locking piece portion 30 Screw 31 Head portion [Embodiments 2-1 to 2-3]
201 alarm device main body 210 housing 211 front surface portion 212 rear surface portion 214 operation button 215 sound hole 216 substrate portion 217 speaker 217c speaker main body 217d ear portion 217e locking recess 218 battery storage portion 219 battery 220 speaker fixing portion 221 rising portion 222 base surface portion 223 Fixed locking piece portion 224 Moving locking piece portion 225 Elastic piece 226 Through portion 230 Substrate portion 231 Speaker fixing portion 232 Rising portion 233 Base surface portion 234 Fixed locking piece portion 235 Moving locking piece portion 236 Elastic piece 237 Slit portion 240 Substrate portion 241 Speaker fixing portion 242 Rising portion 243 Base surface portion 244 Fixed locking piece portion 245 Moving locking piece portion 246 Island portion 247 Bridge portion 248 Gap portion [Embodiment 3]
Reference Signs List 301 Alarm Body 302 Mounting Plate 310 Housing 310a Opening 310b Bearing 310c Locking Receiver 310d Step 311 Front 312 Smoke Inlet 313 Operation Button 314 Sound Hole 320 Operation Unit 321 Outward Extension 322 Rotating Shaft 323 Elastic piece 324 Locking part 325 Back extension part 326 Slit part 328 Edge part (Embodiment 4)
401 Alarm Body 402 Mounting Plate 410 Case 411 Front 412 Smoke Inlet 413 Operation Button 414 Sound Hole 416 Battery Storage Unit 417 Battery 418 Speaker 430 Smoke Detection Unit 431 Smoke Detection Area 432 Substrate Unit 433 Smoke Detection Unit Cover 434 Net Member 435 Light-emitting part 436 Sensor part 436a Detection position 437 Installation base part 440 Base part 441 Light-shielding wall part 441c Arc-shaped surface part 441d Uneven surface part [Embodiment 5]
501 Mounting base 502 Case 503 Detection unit cover 504 Detection unit main body 505 Circuit unit 511 Mounting hook 512 Main unit 512A Case side facing surface 512B Installation surface side facing surface 521 Back case 522 Front case 523 External inflow opening 531 Ceiling plate 532 Labyrinth 532d Labyrinth 532d 532e Labyrinth 533 Insect net 534 Detection space 535 Internal inflow opening 535a Internal inflow opening 535b Internal inflow opening 535c Internal inflow opening 535d Internal inflow opening 535e Internal inflow opening 541 Flange 542 Inclined part 543 Raised part 544 Detection part main body notch 545 Speaker Storage part 546 Element cover 547 Insertion hole 548 Battery holding spring 549 Energizing space 551 Circuit board 552 Light emitting part 553 Light receiving part 554 Shield 555 Switch 55 6 Substrate hole 557 Positioning hole 565 Rib 5100 Alarm device 5111 Screw hole 5121 Screw hole 5122 Engaging portion 5211 Back case side facing wall 5211a Guide recess 5211b Opposing surface 5212 Back case side outer peripheral wall 5212a Back case side end 5213a Slit 5213b Slit 5214 Engagement part 5221 Front case side exposed wall 5222 Front case side outer peripheral wall 5222a Front case side end part 5223 Push button 5224 Screw boss 5225 Support part 5226 Closure protrusion 5400a Detection part main body side end part 5411 Positioning concave part 5431 Arrangement concave part 5432 Light emitting depression Portion 5433 Light receiving recess 5434 Groove 5435 Outer edge wall 5436 Light emitting hole 5437 Light receiving hole 5438 Light-shielding frame 55556 Component case 55612 Component case 55613 Component case 55613a Fixing screw 55613b Insertion hole 55614 Component case 55614a Fixing screw 55614b Insertion hole 55615 Component case 55616 Component case 55616a Outer receiving wall 55616b Inner receiving wall 5617 Component case notch 5561 Short stopper fin 55562 55631 Long fin 55632 Long fin 55641 Prevention piece 55642 Prevention piece 55651 Rib 55652 Rib 55653 Rib 55654 Rib 55655 Rib 55656 Rib 55657 Rib 55658 Rib 55659 Rib 5700 Mounting jig part 5701 Optical axis adjustment pin 5711 5713 Slide member 5714 Spring 5715 Positioning Use protrusion 5716 Tsukezeiana 5720 lid 5721 exposure hole 5900 installation surface Ar1 area Ar2 region Ar3 region CN1 power connector F1 arrow F2 arrow F3 arrow F4 arrow F5 arrow F21 arrow F22 arrow P1 external stagnation point P2 internal stagnation

Claims

In the equipment mounting structure where the equipment body is attached to the installation surface with the mounting plate,
The mounting plate has a screw hole portion through which a screw for fixing to the installation surface is inserted, and a rising portion having a height higher than the head portion of the screw is formed around the screw hole portion. Equipment mounting structure characterized by that.
The mounting plate has a device fixing surface portion for fixing the device body, and the device fixing surface portion is formed with a locking piece portion for locking the device body and the screw hole portion, and 2. The device mounting structure according to claim 1, wherein the rising portion is formed so as to rise from the device fixing surface portion.
The device main body has a battery housing portion for housing a battery, the battery housing portion opens toward the mounting plate, and the screw hole portion is formed at a position facing the battery housing portion. The equipment mounting structure according to claim 1 or 2.
The device mounting structure according to any one of claims 1 to 3, wherein the device main body is a fire alarm that detects an occurrence of a fire and issues an alarm.
In the mounting plate for mounting the device body to the installation surface,
The mounting plate has a screw hole portion through which a screw for fixing to the installation surface is inserted, and a rising portion having a height higher than the head portion of the screw is formed around the screw hole portion. A mounting plate characterized by having
The mounting plate has a device fixing surface portion for fixing the device body, and the device fixing surface portion is formed with a locking piece portion for locking the device body and the screw hole portion, and The mounting plate according to claim 5, wherein the rising portion is formed so as to rise from the device fixing surface portion.
In an alarm device having a speaker that emits sound from the front in the housing,
The housing includes a substrate portion having a speaker fixing portion for arranging and fixing the speaker, and an acoustic hole is formed on the front surface of the housing at a position facing the front surface of the speaker.
The speaker fixing portion includes a base surface portion that faces the back surface of the speaker, and a locking portion that is locked to a peripheral portion of the speaker.
The base surface portion has one or a plurality of penetrating portions.
The substrate portion is housed in a hollow interior of the housing, and a space portion is formed between the substrate portion and the rear surface portion of the housing, and the space portion is at least on the rear surface portion side of the housing. The alarm device according to claim 7, wherein the alarm device is closed.
The alarm device according to claim 7 or 8, wherein the locking portion includes a plurality of locking piece portions provided along a circumferential direction of the speaker formed in a substantially circular shape.
The alarm device according to claim 7 or 8, wherein the locking portion includes a pair of locking pieces facing each other in a diameter direction of the speaker formed in a substantially circular shape.
The said latching piece part consists of the fixed latching piece part fixed to the said board | substrate part, and the movement latching piece part which can move elastically with respect to the said board | substrate part. The alarm device described.
12. The alarm device according to claim 11, wherein the movable locking piece portion is formed as an elastic piece supported in a cantilevered manner on the base surface portion.
The alarm device according to any one of claims 7 to 12, wherein the penetrating portion includes a plurality of small holes formed in the base surface portion.
The movable locking piece is formed into an elastic piece that can be elastically deformed by two slit portions that reach at least a position beyond the center of the base surface portion from one end portion of the base surface portion, and the slit portion is the through portion. The alarm device according to claim 11, wherein:
The movable locking piece portion is formed in an island-like portion connected to the substrate portion by a thin bridge portion, and a gap between the island-like portion and the base surface portion is formed in the penetrating portion. The alarm device according to claim 11, wherein:
In an alarm device having a case and an operation button provided in the case and capable of pressing and returning,
The operation button has a rotation shaft portion on an outer peripheral portion, and the housing has an opening portion for housing the operation button, and a bearing portion for holding the rotation shaft portion at an edge portion of the opening portion. ,
The alarm is characterized in that the operation button has a locking portion that is locked in a state in which the operation button is urged in a return operation direction of the operation button with respect to the housing.
The alarm device according to claim 16, wherein the operation button is provided with the rotation shaft portion in the vicinity of one end portion, and has a long shape from one end portion where the rotation shaft portion is provided toward the other end portion.
The operation button has an operation part exposed from the opening part, and an outward extension part extending outward from one end of the operation part, and the rotating shaft part is provided in the outward extension part. The alarm device according to claim 16 or 17, wherein the alarm device is provided.
The operation button has an elastic piece that extends in the same direction as the outward extending portion from one end of the operating portion and is juxtaposed with the outward extending portion. The alarm according to claim 18, wherein the locking portion is formed.
The operation button has a rear extension portion extending rearward, and the rear extension portion has a slit portion through which the pull string is inserted, and the slit portion can be deformed in a direction in which the width increases. The alarm device according to any one of claims 16 to 19, characterized in that:
For fire alarms with smoke detectors inside the housing,
The smoke detector unit is provided with a smoke detector cover so as to surround a smoke detector region where the sensor unit is arranged, and the smoke detector cover has a plurality of light shielding walls along the circumferential direction,
The light shielding wall portion has a single plate shape, and a gap is formed between the adjacent light shielding wall portions to communicate the inside and outside of the smoke detection region, and on the radiation centered on the detection position of the sensor portion. Are arranged so that the light shielding wall portions overlap each other in the radial direction so that any one of the light shielding wall portions is located.
The fire alarm according to claim 21, wherein the light shielding wall portion is disposed and erected so as to be inclined in a radial direction along a circumferential direction of the smoke detection region from a base portion of the smoke detection portion cover. vessel.
The fire alarm device according to claim 21 or 22, wherein the light shielding wall portion has an arcuate surface portion that forms an outer peripheral surface of the smoke detection region.
The light emitting portion is disposed in the smoke detection region, and at least a surface of the light shielding wall portion that receives light from the light emitting portion has an uneven shape. The fire alarm according to any one of the above.
A substrate on which the element can be mounted;
Detection means electrically mounted on the substrate, the detection means for detecting whether or not the substance to be detected is contained in the gas flowing into the detection space;
Covering means arranged so as to cover the substrate and the detection means without interfering with the detection means, the covering means interposed between the substrate and the detection space,
Alarm device.
The detecting means includes a light receiving means for detecting whether or not a substance to be detected is included based on the amount of received light.
The alarm device is a noise preventing means for preventing noise to the light receiving means, and is formed by being fixed to the light receiving means so that the light receiving means faces a predetermined direction, whereby the optical axis of the light receiving means Including noise prevention means for determining
The alarm device according to claim 25.
A flange for accelerating the inflow of the gas into the detection space, the flange being formed integrally with an outer edge of the covering means;
The alarm device according to claim 25 or 26.
A power supply biasing means for biasing and holding a power supply unit for supplying power to the alarm device, comprising a power supply biasing means formed integrally with the covering means;
The alarm device according to any one of claims 25 to 27.
Storage means for storing output means for performing alarm output, comprising storage means formed integrally with the covering means,
The alarm device according to any one of claims 25 to 28.
The detection means is a light emission means that emits light to the detection space, and includes a light emission means that is arranged in a state bent from a mounting position with respect to the substrate in a predetermined direction,
The substrate includes a substrate hole provided at a position corresponding to a bent portion of the light emitting unit, and a substrate hole into which an angle determining device for determining an attachment angle of the light emitting unit with respect to the substrate can be inserted. ,
The alarm device according to any one of claims 25 to 29.
A housing means for accommodating the detecting means and the covering means inside, the housing means having a closing means for closing the substrate hole in a state in which the detecting means and the covering means are housed;
The alarm device according to claim 30.
The closing means is a support means capable of supporting the detection means.
The alarm device according to claim 31.
The detection means is a light emission side detection means that emits light to the detection space, and a light reception that detects whether or not the substance to be detected is contained in the gas flowing into the detection space based on the amount of light received. Side detection means,
The covering means includes a light emitting hole for introducing light from the light emitting side detecting means to the detection space through the covering means, and the light receiving side detection passing through the covering means from the detection space. A light receiving hole for introducing reflected light into the means,
The alarm device according to any one of claims 25 to 32.
A groove formed around the light emitting hole or the light receiving hole on the surface of the covering means facing the detection space, the groove having a groove recessed toward the opposite side of the detection space;
The alarm device according to claim 33.
A light-shielding means formed around the light-emitting hole or the light-receiving hole on the surface of the covering means facing the substrate, arranged to be raised toward the substrate, and the light-emitting side detecting means or A light shielding means for covering the periphery of the light receiving side detection means,
The alarm device according to claim 33 or 34.
An attachment step of attaching a detection means for detecting whether or not a substance to be detected is contained in the gas flowing into the detection space to a substrate on which the element can be mounted, at a predetermined angle;
A mounting step of electrically mounting the detection means attached to the substrate in the attachment step with respect to the substrate while maintaining the predetermined angle;
A covering means installation step of installing a covering means interposed between the substrate and the detection space so as to cover the substrate and the detection means mounted on the substrate in the mounting step,
Manufacturing method of alarm device.