Alarm device

Abstract

This provides an alarm system that makes it easy to position the speaker at a height close to the appropriate level. [Solution] The alarm device 10 comprises a housing 1, an activation unit 2, an indicator light 3, a speaker 5, and a circuit board. The activation unit 2 has a push button 21 including an operating surface 211 located on the front surface 101 of the housing 1, and a movable element that is linked to the push button 21. The speaker 5 is housed in the housing 1. The circuit board is housed in the housing 1. The circuit board causes the speaker 5 to output an alarm sound when the movable element moves from a first position to a second position. The housing 1 comprises a body and a cover 12. The cover 12 is attached to the body so as to cover the front surface of the body. The body has a speaker placement section for positioning the speaker 5 in the part facing the front surface of the circuit board.

Description

Technical Field

[0001] The present disclosure generally relates to an alarm device, and more particularly to an alarm device including an activation unit having a push button and an indicator light.

Background Art

[0002] Patent Document 1 describes that a device storage box provided on the wall surface of a building houses a fire transmitter or the like. The fire transmitter includes a fire transmitter main body having a push button (push button switch) or the like, which is substantially covered with a cover body. When a person who discovers a fire strongly presses the push button of this fire transmitter, a signal notifying the occurrence of a fire is transmitted to a fire receiver installed in a management room or the like and connected to the fire transmitter by wiring. In addition, an alarm sound is emitted from a speaker provided near the fire transmitter, thereby notifying the surrounding people of the occurrence of a fire.

[0003] The device storage box described in Patent Document 1 is described as housing, in addition to the fire transmitter, an indicator light (alarm light) that lights up when an alarm occurs and a speaker (acoustic unit) that generates an alarm sound.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the device storage box described in Patent Document 1, since a fire transmitter including a push button is arranged at the lower end portion thereof, an indicator light is arranged at the upper end portion thereof, and a speaker is arranged between the fire transmitter and the indicator light, the speaker may be arranged at a position slightly lower than the appropriate height.

[0006] This disclosure is made in view of the above-mentioned reasons and aims to provide an alarm device that makes it easy to position the speaker at a height close to the appropriate height. [Means for solving the problem]

[0007] An alarm device according to one aspect of the present disclosure comprises a housing, an activation unit, an indicator light, a speaker, and a circuit board. The activation unit has a push button including an operating surface located on the front of the housing, and a movable element that is linked to the push button. The activation unit is activated when the push button is operated so that the operating surface is pressed, causing the movable element to move from a first position to a second position. The indicator light has a light-emitting part located on the front of the housing. The speaker is housed in the housing. The speaker is located above both the operating surface and the light-emitting part. The circuit board is housed in the housing. The circuit board causes the speaker to output an alarm sound when the movable element moves from the first position to the second position. The housing comprises a body and a cover. The cover is attached to the body so as to cover the front of the body. The body has a speaker placement section for arranging the speaker in a portion facing the front of the circuit board. [Effects of the Invention]

[0008] According to this disclosure, there is an advantage in that the speaker can be easily positioned at a height close to the appropriate height. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a front view showing an alarm device according to Embodiment 1. [Figure 2] Figure 2A is a perspective view of the above alarm device when it is exposed. Figure 2B is a perspective view of the above alarm device when it is embedded. [Figure 3] Figure 3 is an exploded perspective view of the alarm device shown above. [Figure 4]Figure 4A is a schematic diagram showing the installation of an alarm device on a wall according to a comparative example. Figure 4B is a schematic diagram showing the installation of an alarm device on a wall by exposed mounting according to Embodiment 1. Figure 4C is a schematic diagram showing the installation of the same alarm device on a wall by embedded mounting. [Figure 5] Figure 5 is an exploded perspective view of the activation unit of the alarm device shown above. [Figure 6] Figure 6 is a cross-sectional view of the main part of the alarm device shown above. [Figure 7] Figure 7 is a perspective view of the main part of the alarm device shown above. [Figure 8] Figure 8 is an exploded perspective view of the cover, activation unit, and indicator light of the alarm device shown above. [Figure 9] Figure 9 is an exploded perspective view of the light fixture cover, light guide member, and light diffuser member of the alarm device described above. [Figure 10] Figure 10 is a perspective view showing the indicator light of the alarm device described above. [Figure 11] Figure 11 is an exploded perspective view of the internal components of the alarm device shown above. [Figure 12] Figure 12A is a perspective view of the circuit board of the alarm device shown above. Figure 12B is a front view of the circuit board of the alarm device shown above. [Figure 13] Figure 13A is a front view of the same internal organ. Figure 13B is a right side view of the same internal organ. Figure 13C is a rear view of the same internal organ. [Figure 14] Figure 14 is a schematic diagram showing the positional relationship of the components of the internal organ shown above. [Figure 15] Figure 15 is a partially broken perspective view of the alarm device shown above. [Figure 16] Figure 16 is a perspective view of the mounting box for the alarm device shown above. [Figure 17] Figure 17 is a front view showing the same alarm device with the internal components assembled in the mounting box. [Figure 18] Figure 18A shows the mounting structure of the internal unit to the mounting box shown above, and is a perspective view of a partially broken part of the main component. Figure 18B shows a perspective view of a main component of the mounting structure of the internal unit to the mounting box shown above. [Figure 19] Figure 19 is a rear view showing a state in which a cover is combined with an inner unit in the above-described warning device. [Figure 20] Figure 20 is a perspective view of a main part showing an attachment structure of a cover to the above-described inner unit. [Figure 21] Figure 21A is a sectional view in an exploded state showing dimensional relationships among a cover, a lamp body cover, a base member, and a push button of the above-described warning device. Figure 21B is a sectional view in an assembled state showing dimensional relationships among a cover, a lamp body cover, a base member, and a push button of the above-described warning device. [Figure 22] Figure 22A is a front view schematically showing a waterproof area of the above-described inner unit. Figure 22B is a rear view schematically showing a waterproof area of the above-described inner unit. [Figure 23] Figure 23A is a perspective view of a main part showing a waterproof structure of the above-described warning device. Figure 23B is a perspective view of a main part showing a waterproof structure of the above-described warning device and having a part broken away. [Figure 24] Figure 24A is a perspective view of a main part showing a waterproof structure of the above-described warning device. Figure 24B is an enlarged view of a part broken away showing an area A1 in Figure 24A. [Figure 25] Figure 25A is a front view showing a main part of a warning device according to a first modification of Embodiment 1. Figure 25B is a front view showing a main part of a warning device according to a second modification of Embodiment 1. [Figure 26] Figure 26A is a sectional view showing a main part of a warning device according to Embodiment 2. Figure 26B is a perspective view showing an indicator lamp of the above-described warning device. [Figure 27] Figure 27 is an exploded perspective view of a warning device according to Embodiment 3. [Figure 28] Figure 28 is an exploded perspective view of an inner unit of the above-described warning device as viewed obliquely from the front. [Figure 29] Figure 29 is an exploded perspective view of an inner unit of the above-described warning device as viewed obliquely from the rear. [Figure 30] Figure 30A is a sectional view showing a main part of the above-described warning device. Figure 30B is a schematic enlarged view of an area Z1 in Figure 30A. [Figure 31]Figure 31 is an exploded perspective view of the cover of the alarm device shown above, taken from a diagonal rearward angle. [Figure 32] Figure 32A is a schematic diagram of the main part of the cover of the alarm device shown above, viewed from the rear. Figure 32B is a schematic diagram of the main part of the cover of the alarm device shown above, viewed from the front. [Figure 33] Figure 33 is a conceptual diagram showing how the sound source of the alarm device described above is played back and sound is output from the speaker. [Figure 34] Figure 34A is an explanatory diagram showing the speaker characteristics of the speaker of the alarm device according to Embodiment 1, and the speaker characteristics of the thin speaker of the alarm device according to Embodiment 3. Figure 34B is an explanatory diagram showing the frequency of the alarm sound output from the speaker of the alarm device according to Embodiment 3. [Figure 35] Figure 35A is a perspective view showing the main parts of the alarm device according to Embodiment 3. Figure 35B is an exploded perspective view of the main parts of the same alarm device. [Figure 36] Figure 36A is a schematic view of the main part of the alarm device cover according to the first modified example of Embodiment 3, as seen from the rear. Figure 36B is a cross-sectional view taken along the line X1-X1 in Figure 36A. [Modes for carrying out the invention]

[0010] (Embodiment 1) (1) Overview First, an overview of the alarm device 10 according to this embodiment will be described with reference to Figure 1.

[0011] The alarm device 10 according to this embodiment is a device comprising an activation unit 2 including a push button 21 and an indicator light 3. In this disclosure, "alarm device" refers to a device installed in a facility for purposes such as preventing fires or other disasters, preventing the spread of damage caused by disasters, or recovery from disasters. The activation unit 2 is a unit in which the push button 21 is manually operated when a person detects a fire. The indicator light 3, for example, is kept constantly lit to clearly indicate the location of the alarm device 10.

[0012] Such an alarm device 10 is used in a facility. In this embodiment, the example given is that the alarm device 10 is used in non-residential facilities such as office buildings, schools, welfare facilities, commercial facilities, theme parks, hospitals, hotels, or factories, but it is not limited to this example, and the alarm device 10 may also be used in facilities such as apartment buildings or detached houses. The alarm device 10 is not limited to indoor use, but may also be used in specific spaces in outdoor facilities such as parks or sports fields.

[0013] The alarm device 10 is installed on the wall of the facility, etc. The alarm device 10 may be installed with almost the entire device exposed to the wall, etc. (exposed installation), or it may be installed with the rear part of the alarm device 10 embedded in the wall, etc. (recessed installation). As will be described in more detail later, in this embodiment, the case in which the alarm device 10 is "exposed installation" will be explained as an example.

[0014] The alarm device 10 according to this embodiment comprises a housing 1, an activation unit 2, an indicator light 3, and a circuit board 4 (see Figure 3). The activation unit 2 has a push button 21 including an operating surface 211, and a movable element 22 (see Figure 3) that is linked to the push button 21. The operating surface 211 is located on the front surface 101 of the housing 1. When the push button 21 is operated so that the operating surface 211 is pressed, the movable element 22 moves from a first position to a second position (see Figure 6). The indicator light 3 has a light-emitting part 311 located on the front surface 101 of the housing 1. The circuit board 4 is housed in the housing 1. The circuit board 4 outputs an alarm signal triggered by the movement of the movable element 22 from the first position to the second position.

[0015] In this embodiment of the alarm device 10, the light-emitting section 311 is formed in an annular shape that surrounds the operating surface 211 when viewed from the front.

[0016] Furthermore, in the alarm device 10 according to this embodiment, the indicator light 3 further includes, in addition to the light-emitting unit 311, a light source unit 32 (see Figure 6) and a light guide member 33 (see Figure 3). The light source unit 32 is housed within the housing 1. The light guide member 33 guides the light from the light source unit 32 to the light-emitting unit 311, thereby causing the light-emitting unit 311 to emit light.

[0017] Furthermore, the alarm device 10 according to this embodiment further includes a speaker 5 in addition to the housing 1, activation unit 2, indicator light 3, and circuit board 4. The speaker 5 is housed in the housing 1. The speaker 5 receives an alarm signal and outputs an alarm sound. The speaker 5 is located above (in the positive direction of the Z axis) both the operating surface 211 and the light-emitting unit 311.

[0018] According to the alarm device 10 described above, the light-emitting section 311 is formed in an annular shape that surrounds the operating surface 211 when viewed from the front. Therefore, the activation unit 2 (operating surface 211) and the indicator light 3 (light-emitting section 311) are arranged together in one place on the front surface 101 of the housing 1. In other words, since the operating surface 211 is arranged inside the light-emitting section 311, it becomes easier to miniaturize the housing 1 compared to a configuration in which the indicator light 3 (light-emitting section 311) and the operating surface 211 (push button 21) are arranged separately.

[0019] Furthermore, according to the alarm device 10 described above, the indicator light 3 further includes a light source unit 32 and a light guide member 33 in addition to the light-emitting unit 311. Therefore, the output light from the light source unit 32 does not directly enter the light-emitting unit 311, but enters the light-emitting unit 311 via the light guide member 33, making it easier to achieve a relatively uniform illumination state across the entire surface of the light-emitting unit 311. In other words, compared to a configuration in which the light source unit 32 directly illuminates the light-emitting unit 311 from behind, a difference in brightness is less likely to occur between the position where the light source unit 32 is present and the position where the light source unit 32 is not present when viewed from the front, thus reducing the so-called "grainy" appearance. As a result, there is an advantage in that the variation in brightness in the light-emitting unit 311 can be kept to a minimum.

[0020] Furthermore, according to the alarm device 10 described above, the speaker 5 that outputs the alarm sound is located above both the operating surface 211 and the light-emitting part 311 (in the positive direction of the Z-axis). That is, the housing 1 contains the activation unit 2 (operating surface 211), the indicator light 3 (light-emitting part 311), and the speaker 5, and among these, the speaker 5 is located at the highest position. Therefore, it is easier to position the speaker 5 at a higher position compared to a configuration in which the activation unit 2 (operating surface 211) is located at the lower end of the housing 1, the indicator light 3 (light-emitting part 311) is located at the upper end of the housing 1, and the speaker 5 is located between them. In other words, assuming the installation position of the housing 1 is the same, positioning the speaker 5 above both the operating surface 211 and the light-emitting part 311 results in the speaker 5 being positioned at a higher position. As a result, it is easier to set the speaker 5 higher than in conventional designs, and it is easier to position the speaker 5 at a position close to the appropriate height.

[0021] (2)Details The configuration of the alarm device 10 according to this embodiment will be described below with reference to Figures 1 to 24B.

[0022] (2.1) Premise The alarm device 10 houses the activation unit 2, indicator light 3, circuit board 4, and speaker 5 in a single housing 1. Therefore, the alarm device 10 is a "combined device" that not only has the function of an activation unit 2 that accepts human operation, but also the function of displaying information with the indicator light 3 and outputting an alarm sound from the speaker 5. Unlike a fire alarm transmitter, the combined device has both a display function and an alarm sound output function integrated into one unit. In contrast, there are also disaster prevention devices such as integrated panels (equipment housing boxes) that combine a fire alarm transmitter and an audible device, but there are at least five differences between this type of disaster prevention device and the alarm device 10, which consists of a combined device.

[0023] First, one key difference is that in the combined alarm device 10, the activation unit 2 moves the movable element 22 from the first position to the second position, and a separate circuit board 4 outputs an alarm signal triggered by the movement of this movable element 22. In other words, in the combined alarm device 10, the activation unit 2 does not have an electronic circuit, so instead of outputting an electrical signal (alarm signal) in response to the operation of the push button 21, it performs a mechanical output in the form of movement of the movable element 22. In contrast, in fire prevention equipment such as a control panel, the fire alarm transmitter has an electronic circuit, and the fire alarm transmitter itself outputs an electrical signal in response to the operation of the push button. Therefore, the activation unit 2 of the combined alarm device 10 is smaller than a fire alarm transmitter because it does not have a built-in electronic circuit.

[0024] The second difference is that the combined alarm device 10 is basically configured to operate independently, whereas disaster prevention equipment such as a control panel is equipment that works in cooperation with the receiver of an automatic fire alarm system. In other words, disaster prevention equipment such as a control panel is used as a component of an automatic fire alarm system that includes, for example, detectors such as heat detectors, smoke detectors or flame detectors, and a receiver that receives alarm signals (fire signals) from the detectors.

[0025] A third difference is that the combined alarm device 10 is equipped with a battery 7 (see Figure 3), which will be described later, and can operate using the power from the battery 7 even when the external power supply is interrupted due to a power outage or other reasons. In contrast, disaster prevention equipment such as the control panel operates using power supplied from the receiver of the automatic fire alarm system.

[0026] The fourth difference is that the combined alarm device 10 has a speaker 5 as an acoustic device that outputs an alarm sound consisting of an electronic tone. In other words, speaker 5 is driven by an acoustic circuit mounted on the circuit board 4 and outputs (plays) an alarm sound in response to an electrical signal from the acoustic circuit. In contrast, disaster prevention equipment such as a control panel is equipped with a bell as an acoustic device, and outputs an alarm sound by ringing the bell rather than an electronic tone.

[0027] The fifth difference is that the combined alarm device 10 has a test operation unit 8 (see Figure 1) that accepts test operations, separate from the activation unit 2 which has a push button 21. The test operation unit 8 is for testing the operation of the battery 7. In other words, when an operation is performed on the test operation unit 8, the alarm device 10 performs operational tests such as testing the remaining charge of the battery 7. In contrast, disaster prevention equipment such as a control panel does not have a test operation unit.

[0028] In this embodiment, as an example, the alarm device 10 is installed on the facility wall W1 (see Figures 4A to 4C). In other words, the facility wall W1 constitutes the mounting target to which the alarm device 10 is attached. In particular, in this embodiment, it is assumed that the alarm device 10 is installed on wall W1, which is the outer wall of the facility. In other words, the operating environment for the alarm device 10 is assumed to be outdoors.

[0029] Furthermore, in this embodiment, the case in which the alarm device 10 is "exposed installation" will be described as an example. In exposed installation, the alarm device 10 is installed on the wall W1 using a mounting box 6 (see Figure 2A) that is fixed to the wall W1.

[0030] In the following, when the alarm device 10 is mounted on wall W1, the direction perpendicular (orthogonal) to the horizontal plane will be referred to as the "up and down direction," and the downward direction in the up and down direction will be referred to as "downward." The thickness direction of wall W1 will be referred to as the "front and back direction," and the side of the alarm device 10 viewed from wall W1 will be referred to as the "front." Furthermore, when viewing the alarm device 10 from the front, the right side will be referred to as the "right side," and the left side as the "left side." In the drawings, directions are indicated using three mutually orthogonal axes: the X, Y, and Z axes. The X axis corresponds to the left and right direction, and the positive direction of the X axis corresponds to the "right side." The Y axis corresponds to the front and back direction, and the positive direction of the Y axis corresponds to the "rear." The Z axis corresponds to the up and down direction, and the positive direction of the Z axis corresponds to the "upward" direction. However, the X, Y, and Z axes in the drawings are for illustrative purposes only and do not represent actual dimensions. Also, these directions are not intended to limit the direction of use (mounting direction) of the alarm device 10.

[0031] Furthermore, unless otherwise specified, the directions "upward" and "downward" as used in this disclosure refer to the direction when the alarm device is installed on a mounting surface such as a wall. In other words, "upward" is the positive direction of the Z-axis, and "downward" is the negative direction of the Z-axis. For example, "A is located above B" means that when the alarm device is installed, A is located above B, or in other words, A is at a higher position than B (further from the floor or ground).

[0032] Furthermore, the "appropriate height" for the placement of speaker 5 as referred to in this disclosure means the vertical position (height) at which a person can easily perceive the sound emitted from speaker 5. In other words, a height close to the height of a typical person's ear can be considered the "appropriate height" for the placement of speaker 5. On the other hand, the alarm device 10 is equipped with a push button 21, and an appropriate mounting height has been determined for the alarm device 10 so that even relatively short children can operate the push button 21. If the alarm device 10 satisfies this appropriate mounting height, it will be mounted at a position slightly lower than the average adult's height. Therefore, for example, if speaker 5 is located near the vertical center of the alarm device 10, the position of speaker 5 will be slightly lower than the appropriate height. In contrast, in the alarm device 10 according to this embodiment, the speaker 5 is positioned higher than both the activation unit 2 (operating surface 211) and the indicator light 3 (light-emitting part 311) within the alarm device 10, making it easier to position the speaker 5 at a height close to the appropriate height.

[0033] Furthermore, the term "center" as used in this disclosure includes a point equidistant from the surroundings (the center point) and the area around it, meaning it may include cases where it is substantially the center. For example, if A is at the center of B, the center point of A and the center point of B do not necessarily coincide perfectly. In other words, if A is at the center of B, the center points of A and B only need to coincide approximately, and they may be slightly offset from each other.

[0034] Furthermore, the term "flush surface" as used in this disclosure includes not only cases where objects are strictly on the same plane, but also cases where they are substantially on the same plane, that is, cases where they are practically flush. For example, if A is flush with B, A and B do not necessarily have to be on the same plane. In other words, if A is flush with B, A only needs to be substantially on the same plane as B, and A may protrude slightly from B (bump) or be slightly recessed from B.

[0035] (2.2) Overall structure First, the overall configuration of the alarm device 10 will be explained with reference to Figures 1 to 4C.

[0036] In this embodiment, the alarm device 10 includes a starting unit 2 and an indicator light 3, as described above. In addition to the starting unit 2 and the indicator light 3, the housing 1 also houses, for example, a circuit board 4 and a speaker 5.

[0037] Furthermore, in this embodiment, as described above, the alarm device 10 is installed on the wall W1 of the facility to be installed by "exposed installation," in which substantially the entire alarm device 10 is exposed. In exposed installation, the alarm device 10 is installed on the wall W1 by being attached to a mounting box 6 (see Figure 2A) fixed to the wall W1. In this embodiment, the mounting box 6 is included as a component of the alarm device 10. In other words, the alarm device 10 according to this embodiment further comprises a mounting box 6 in addition to the housing 1, activation unit 2, indicator light 3, circuit board 4 and speaker 5. However, the mounting box 6 does not have to be included as a component of the alarm device 10.

[0038] As described above, the alarm device 10 according to this embodiment is a "composite device" that includes a starting unit 2, an indicator light 3, a circuit board 4, and a speaker 5 in a single housing 1. In addition to the housing 1, starting unit 2, indicator light 3, circuit board 4, speaker 5, and mounting box 6, the alarm device 10 further includes a storage battery 7 (see Figure 3) and a test operation unit 8.

[0039] Basically, the alarm device 10 operates using power supplied to the circuit board 4 from an external power source (e.g., grid power). In normal operation, the alarm device 10 clearly indicates its location by keeping the indicator light 3 constantly illuminated. Furthermore, the alarm device 10 has a push button 21 on the activation unit 2 that can be pressed, and when the push button 21 is pressed, it switches from the normal state to the alarm activation state. In other words, when a person detects an abnormality such as a fire, they can press the push button 21 on the activation unit 2 to activate the alarm device 10 and switch its operating state from the normal state to the alarm activation state.

[0040] In other words, the alarm device 10 switches its operating state from the normal state to the alarm state when the movable element 22 moves from the first position to the second position, triggering the circuit board 4 to output an alarm signal. When the alarm device 10 enters the alarm state, the speaker 5 receives the alarm signal and outputs an alarm sound (electronic sound). The alarm signal is transmitted to an external device connected to the alarm device 10 (for example, a receiver for an automatic fire alarm system). Furthermore, when the alarm device 10 enters the alarm state, the indicator light 3 may flash or light up.

[0041] When the recovery button 23 (see Figure 1) on the startup unit 2 is operated, the operating state of the alarm device 10 switches from the alarm state to the normal state. Furthermore, if the power supply from an external power source (e.g., grid power) to the circuit board 4 is stopped due to a power outage or the like, the alarm device 10 uses the power stored in the battery 7 to perform the same operation as described above. Therefore, the alarm device 10 can operate on its own. In addition, when an operation is performed on the test operation unit 8, the alarm device 10 performs operational tests such as a battery charge test.

[0042] Incidentally, in the alarm device 10 according to this embodiment, the functions of the operating system for receiving human operation are concentrated below the vertical center C1 on the front surface 101 of the housing 1 when viewed from the front. Specifically, the alarm device 10 is equipped with a push button 21 of the activation unit 2 and a test operation unit 8 that receives test operations as functions of the operating system. Therefore, the operating surface 211 of the push button 21 is located below the vertical center C1 on the front surface 101 of the housing 1. Furthermore, the test operation unit 8 is also located below the vertical center C1 on the front surface 101 of the housing 1.

[0043] In this way, the functions of the control system are concentrated below the center C1 in the vertical direction (Z-axis direction) on the front surface 101 of the housing 1, making it easier for relatively short people, such as children, to use the functions of the control system. Generally, this type of alarm device 10 is installed so that its center C1 is at a height of about 150 cm from the floor (or ground). Therefore, with the above arrangement, the functions of the control system (push buttons 21 and test control unit 8) are located at a height of 150 cm or less, improving operability.

[0044] Specifically, when the alarm device 10 is installed, it is preferable that the functions of the operating system (push button 21 and test operating unit 8) are located at a height of 80 cm to 150 cm from the floor (or ground). More preferably, the center point of the operating surface 211 of the push button 21 is located at a height of 80 cm to 150 cm from the floor (or ground). In other words, it is preferable that the installation height of the alarm device 10 be determined such that the center point of the operating surface 211 of the push button 21 is located at a height of 80 cm to 150 cm from the floor (or ground).

[0045] Furthermore, the test operation unit 8 is positioned on the front surface 101 of the housing 1, between the speaker 5 and the indicator light 3. In other words, in this embodiment, the test operation unit 8 is positioned above the push button 21 of the activation unit 2, and the speaker 5 is positioned even higher above it.

[0046] Figure 2A is a perspective view of the alarm device 10 when it is installed exposed. When installed exposed, the alarm device 10 is assembled to the mounting box 6, which is a box-shaped mounting box with an open front, so that the housing 1 closes the front of the box-shaped mounting box 6. As a result, the alarm device 10 has an overall appearance that is roughly rectangular.

[0047] On the other hand, Figure 2B is an external perspective view of the alarm device 10 when it is installed embedded. In other words, when the alarm device 10 is installed on the wall W1 of the facility to which it is to be mounted, with its rear end embedded in the wall W1 of the facility to which it is to be mounted, the mounting box 6 is not used. Therefore, the housing 1 constitutes the outer casing of the alarm device 10. As a result, the alarm device 10 as a whole has an appearance in which the rear end is slightly smaller when viewed from the front.

[0048] Figure 3 is an exploded perspective view of the alarm device 10 (including the mounting box 6). As is clear from Figure 3, the housing 1 has a body 11 and a cover 12. The cover 12 is attached to the body 11 so as to cover the front of the body 11. The storage battery 7 and the like are housed in the space enclosed by the body 11 and the cover 12. As will be described in more detail later, the cover 12 is fixed to the body 11 with screws 131 and insert nuts 132.

[0049] Furthermore, the body 11 has a flat plate portion 111, a housing portion 112 that protrudes rearward from the rear surface of the flat plate portion 111, and a back cover portion 113 that closes the rear surface of the housing portion 112. The circuit board 4 and speaker 5, etc., are housed in the space enclosed by the flat plate portion 111, the housing portion 112, and the back cover portion 113. The flat plate portion 111 and the housing portion 112 are integrated. The back cover portion 113 is fixed to the housing portion 112 with several screws (seven in this case) 114.

[0050] A transformer 42, a capacitor 43, and several fuses (three in this case) 44 are mounted on the front of the circuit board 4. Furthermore, the fuses 44 are held in place by fuse clips 45 so that they can be attached to and detached from the circuit board 4 from the front side of the body 11 (flat plate portion 111). In addition, a spare fuse 46 is held on the front side of the body 11 (flat plate portion 111) (i.e., within the space enclosed by the body 11 and cover 12).

[0051] The activation unit 2 and indicator light 3 are attached to the cover 12 of the housing 1. The activation unit 2 and indicator light 3 are located at the lower end of the housing 1. The activation unit 2 is attached to the cover 12, which is the front wall of the housing 1, from the rear side. Here, the activation unit 2 is attached to the cover 12 such that a portion of the indicator light 3 is sandwiched between it and the cover 12. In other words, the indicator light 3 is attached to the front wall (cover 12) of the housing 1 by being sandwiched between the cover 12, which is the front wall of the housing 1, and the activation unit 2.

[0052] Furthermore, a circular through-hole 121 is formed at the lower end of the cover 12. When the activation unit 2 and indicator light 3 are attached to the cover 12, at least a portion of them is exposed to the front side of the cover 12 (the front surface 101 of the housing 1) through this through-hole 121. At least the operating surface 211 of the push button 21 of the activation unit 2 is exposed to the front surface 101 through the through-hole 121. At least the light-emitting portion 311 of the indicator light 3 is exposed to the front surface 101 through the through-hole 121. Therefore, the activation unit 2 and indicator light 3 are not completely housed within the housing 1, but are held in the housing 1 with at least a portion of them exposed to the outside of the housing 1.

[0053] As will be described in more detail later, in this embodiment, the light-emitting portion 311 of the indicator light 3 is flush with at least the area around the light-emitting portion 311 on the front surface 101 of the housing 1. Furthermore, the light-emitting portion 311 of the indicator light 3 is flush with the operating surface 211 of the push button 21. Therefore, both the light-emitting portion 311 of the indicator light 3 and the operating surface 211 of the push button 21 are flush with at least the area around the light-emitting portion 311 on the front surface 101 of the housing 1. In addition, since a wire passage opening 115 is opened at the lower end of the body 11, at least the activation unit 2 is also exposed from the rear surface of the housing 1 through the wire passage opening 115.

[0054] As described above, the mounting box 6 is formed in the shape of a box with an open front. The housing 1 (body 11 and cover 12) is assembled to the mounting box 6 so as to close this opening (the front of the mounting box 6) with the housing 1. In practice, the housing 1 is assembled to the mounting box 6 by first attaching the body 11 of the housing 1 to the mounting box 6, and then attaching the cover 12 to the body 11. A packing 61 is attached to the upper end 64 of the mounting box 6 to fill the gap with the housing 1. Wiring holes 65 for routing wires are formed in the rear wall and bottom wall of the mounting box 6.

[0055] The housing 1 (body 11 and cover 12) and the mounting box 6 are made of resin such as polycarbonate (PC) resin, ASA (Acrylonitrile Styrene Acrylate) resin, PC / ABS (Acrylonitrile Butadiene Styrene) alloy resin, or ABS resin.

[0056] Figures 4A to 4C are schematic diagrams showing the installation state of the alarm device 10X as a comparative example and the alarm device 10 according to this embodiment on a wall W1. Figure 4A shows the alarm device 10X as a comparative example, Figure 4B shows the installation state of the alarm device 10 according to this embodiment by exposed installation, and Figure 4C shows the installation state of the alarm device 10 according to this embodiment by embedded installation.

[0057] Here, as a comparative example, we consider an alarm device 10X comprising a housing 1X including a body 11X and a cover 12X, and an indicator light 3X, as shown in Figure 4A. Furthermore, here we assume that the alarm device 10X of the comparative example is exposed installation using a mounting box 6X. The indicator light 3X in the comparative example has a translucent, dome-shaped light body cover, and employs a configuration in which the light body cover is directly illuminated by light from a light source located behind the light body cover. In this case, variations in brightness are likely to occur on the surface of the light body cover. Moreover, in such a configuration, the indicator light 3X protrudes significantly from the front surface 101X of the housing 1X. Therefore, the amount of protrusion (height) L2 of the indicator light 3X from the wall W1 is even greater than the amount of protrusion (height) L1 of the front surface 101X of the housing 1X from the wall W1 (L2 > L1). As a result, the alarm device 10X of the comparative example has a relatively large amount of protrusion (height) from the wall W1 to which it is mounted. In particular, when the alarm device 10X is installed in a relatively narrow space such as a passageway (including a corridor), the alarm device 10X protrudes into this space (passageway, etc.), making it likely to be an obstruction for people passing through this space (passageway, etc.).

[0058] In contrast, in the alarm device 10 according to this embodiment, even with the same exposed installation, the light-emitting part 311 of the indicator light 3 is flush with at least the surrounding area of ​​the light-emitting part 311 on the front surface 101 of the housing 1, so as shown in Figure 4B, there is no protrusion from the indicator light 3. In other words, in the alarm device 10 according to this embodiment, even when mounted on the wall W1 using the mounting box 6, the amount of protrusion (height) L3 of the indicator light 3 from the wall W1 is kept relatively small. However, in order to accommodate the indicator light 3 within the amount of protrusion L3 of the front surface 101 of the housing 1 from the wall W1, it would normally be considered that the dimensions of the housing 1 in the front-to-back direction would be large. In the alarm device 10 according to this embodiment, the dimensions of the housing 1 in the front-to-back direction are also kept small by the low-profile measures described later. As a result, in the alarm device 10 according to this embodiment, it is possible to make the amount of protrusion L3 of the front surface 101 of the housing 1 from the wall W1 smaller than the amount of protrusion L1 of the front surface 101X of the housing 1X from the wall W1 in the comparative example.

[0059] Furthermore, when the alarm device 10 according to this embodiment is installed in a recessed manner, as shown in Figure 4C, the amount of protrusion (height) L4 of the front surface 101 of the housing 1 from the wall W1 can be further reduced. In other words, in recessed installation, a construction hole W11 is made in the wall W1 to be installed, and the rear part of the housing 1 is inserted into this construction hole W11, so that the alarm device 10 is installed with a part (rear part) of the housing 1 embedded in the wall W1. More precisely, the alarm device 10 is attached to the wall W1 by inserting the housing part 112 of the body 11 into the construction hole W11 with the rear surface of the flat plate portion 111 of the body 11 and the rear surface of the cover 12 touching the wall W1. In other words, the rear surface of the flat plate portion 111 and the rear surface of the cover 12 are in contact with the area around the construction hole W11 in the wall W1. When used outdoors, it is preferable to apply waterproof sealing between this part, i.e., the rear surface of the flat plate portion 111 and the rear surface of the cover 12 and the wall W1. Furthermore, in this type of embedded installation, as shown in Figure 4C, the alarm device 10 is mounted using a switch box B1 located inside (behind) the wall W1. In other words, the housing 1 is fixed to the wall W1 by being attached to the switch box B1 instead of the mounting box 6.

[0060] (2.3) Configuration of the startup unit Next, the configuration of the startup unit 2 will be explained with reference to Figures 5 to 8.

[0061] As shown in Figure 5, the activation unit 2 includes a push button 21 and a movable element 22, as well as a reset button 23, a base member 24, a pair of movable plates 25, a pair of springs 26, and a cover 27. The cover 27 is fixed to the base member 24 with several (four in this case) screws 28.

[0062] The base member 24 is fixed to the housing 1. The base member 24 includes an annular plate 241. Here, the base member 24 is fixed to the cover 12 of the housing 1 such that the annular plate 241 is exposed on the front surface 101 side of the housing 1. In other words, the portion of the base member 24 that is exposed on the front surface 101 side of the housing 1 while fixed to the housing 1 constitutes the annular plate 241. The base member 24 includes an overhang 243 that extends outward from the annular plate 241, and the overhang 243 is fixed to the cover 12 of the housing 1 with a number of screws 29 (four in this case) (see Figure 8).

[0063] A circular hole 244 is formed in the central part of the base member 24, which is on the inside of the annular plate 241, to expose the operating surface 211 of the push button 21. Furthermore, a hole 246 is formed above the circular hole 244 in the annular plate 241 to expose the reset button 23.

[0064] The base member 24 has a housing chamber 245 on its rear side. The housing chamber 245 of the base member 24 houses a push button 21, a movable element 22, a reset button 23, a pair of movable plates 25, and a pair of springs 26. The lid 27 is fixed to the base member 24 so as to close the rear surface of the housing chamber 245.

[0065] The base member 24, like the housing 1, is made of a resin such as polycarbonate resin, ASA resin, PC / ABS alloy resin, or ABS resin.

[0066] The movable element 22 is linked to the push button 21. That is, when the push button 21 is operated so that the operating surface 211 is pressed, the movable element 22 moves from the first position to the second position. The movable element 22 has a pair of shaft pieces 221. The pair of shaft pieces 221 are provided at both ends of the movable element 22 in the left-right direction (X-axis direction). The movable element 22 is held by the lid 27 in a state in which it can rotate around the pair of shaft pieces 221, as the pair of shaft pieces 221 are supported by the lid 27. Specifically, the movable element 22 moves between the first position and the second position by rotating around a rotation axis Ax1 (see Figure 6) that passes through the pair of shaft pieces 221.

[0067] In this embodiment, when the push button 21 is in a steady position (described later), the movable element 22 is in a first position, and when the push button 21 is in an operating position (described later), the movable element 22 is in a second position. In other words, as the push button 21 moves from the steady position to the operating position, the movable element 22 moves from the first position to the second position.

[0068] In the activation unit 2, the movement of the movable element 22 from the first position to the second position is taken out as an output. In other words, the activation unit 2 does not contain any electronic circuits or the like, and is a unit that provides a mechanical output in the form of the movement of the movable element 22. This output of the activation unit 2, that is, the movement of the movable element 22 from the first position to the second position, serves as a trigger for the circuit board 4, which will be described later, to output an alarm signal. In other words, the circuit board 4 outputs an alarm signal triggered by the output of the activation unit 2 (the movement of the movable element 22 from the first position to the second position).

[0069] Specifically, the movable element 22 drives the contact portion 47 provided on the circuit board 4. As shown in Figure 7, the contact portion 47 has a fixed contact 471, a movable contact 472, and a pusher 473. The fixed contact 471 is fixed to the main board body 41 of the circuit board 4. The movable contact 472 is movable between a separated position away from the fixed contact 471 and a contact position in contact with the fixed contact 471. In this embodiment, as an example, the movable contact 472 is a spring contact that is normally located in the separated position. Also, in this embodiment, as an example, the contact portion 47 has one pair each of fixed contact 471 and movable contact 472. The pusher 473 is fixed across this pair of movable contacts 472. In other words, the contact portion 47 is a normally-off type contact, and is turned on when an external force is applied to the pusher 473, causing the pair of movable contacts 472 to move to the contact position against their elastic force. When the movable element 22 moves from the first position to the second position, it pushes the plunger 473, thereby switching the contact portion 47 from off to on.

[0070] A pair of movable plates 25 are positioned on both sides of the push button 21 in the vertical direction (Z-axis direction). Each movable plate 25 has a tongue piece 251, an outer end 252, a pair of shaft pieces 254, and a pair of hook pieces 255. The tongue piece 251 is provided on the end of each movable plate 25 on the side of the push button 21 in the vertical direction (Z-axis direction). The outer end 252 is provided on the end of each movable plate 25 on the side opposite to the push button 21 in the vertical direction (Z-axis direction). The pair of shaft pieces 254 are provided on both ends of each movable plate 25 in the left-right direction (X-axis direction). The pair of hook pieces 255 are provided on both sides of the outer end 252 of each movable plate 25 in the left-right direction (X-axis direction). Each movable plate 25 is held by the lid 27 in a state in which it can rotate around the pair of shaft pieces 254, as the pair of shaft pieces 254 are supported by the lid 27. Furthermore, a coupling hole 253 for connecting to a reset button 23 is formed near the outer end 252 of each movable plate 25.

[0071] A pair of springs 26 are positioned on both sides of the push button 21 in the left-right direction (X-axis direction). Each spring 26 is a tension spring, and both ends of its longitudinal direction (up-down direction) are hooked onto the hook pieces 255 of the pair of movable plates 25. In other words, one end of each spring 26 in the longitudinal direction is hooked onto the hook piece 255 of one movable plate 25, and the other end of each spring 26 in the longitudinal direction is hooked onto the hook piece 255 of the other movable plate 25. As a result, the pair of springs 26 generate an elastic force that brings the hook pieces 255 of the pair of movable plates 25, across which the pair of springs 26 are connected, closer together.

[0072] The reset button 23 is a component for returning the movable element 22 from the second position to the first position. The reset button 23 is connected to one of the pair of movable plates 25 (the upper one in this embodiment) by being inserted into the coupling hole 253 of the movable plate 25. When the push button 21 is in the operating position, pushing the reset button 23 backward (in the positive direction of the Y-axis) returns the push button 21 from the operating position to its normal position. In other words, the operating state (the state in the operating position) of the push button 21 is released by operating the reset button 23.

[0073] The push button 21 has an operating surface 211 that is positioned on the front surface 101 of the housing 1. The push button 21 is assembled to the base member 24 so as to be positioned within the circular hole 244 on the inside of the annular plate 241. The push button 21 is operated by pushing the operating surface 211 relatively strongly backward (in the positive direction of the Y axis). The operating surface 211 of the push button 21 is positioned at the center of the front surface of the annular plate 241. In this embodiment, the operating surface 211 of the push button 21 is circular in shape with a diameter smaller than the inner circumference of the annular plate 241. Furthermore, in this embodiment, in a front view, the center point of the operating surface 211 of the push button 21 coincides with the center point of the annular plate 241. In other words, the operating surface 211 of the push button 21 is concentric with the annular plate 241.

[0074] The push button 21 is configured to be movable between a steady position and an operating position. When the push button 21 is in the steady position, as shown in Figure 6, the operating surface 211 of the push button 21 is substantially flush with the front surface of the annular plate 241. When the push button 21 is in the steady position, the push button 21 moves to the operating position when the operating surface 211 is pushed backward. When the push button 21 is in the operating position, as shown by the dashed line (double-dotted line) in Figure 6, the operating surface 211 of the push button 21 is recessed backward relative to the front surface of the annular plate 241. The push button 21 is a self-holding type button, and once it moves to the operating position, it does not automatically return to the steady position, but returns to the steady position when the reset button 23 is operated.

[0075] More specifically, the push button 21 has a disc portion 212 on which an operating surface 211 is formed, and a projection 213 that protrudes rearward from the rear surface of the disc portion 212. Hooking recesses 214 are formed on both ends of the projection 213 in the vertical direction (Z-axis direction). The tongues 251 of a pair of movable plates 25 are inserted into the pair of hooking recesses 214, causing the tongues 251 to catch on the hooking recesses 214. As a result, the pair of movable plates 25 are driven as the push button 21 moves between a steady position and an operating position.

[0076] The operation of the activation unit 2 when the push button 21 is pressed, and the operation of the activation unit 2 when the push button 21 is released, will be explained with reference to Figures 6 and 7.

[0077] When the operating surface 211 of the push button 21, which is in a steady position, is pressed, the push button 21 moves backward (in the positive direction of the Y-axis) as shown by arrow A1, and the pair of movable plates 25 rotate accordingly. At this time, the pair of movable plates 25 rotate in the direction of arrow A2 such that each tongue 251 moves backward (in the positive direction of the Y-axis) and each outer end 252 moves forward (in the negative direction of the Y-axis). Furthermore, as the pair of movable plates 25 rotate, the pair of springs 26 stretch to their maximum extent when the pair of movable plates 25 are in a position approximately perpendicular to the front-to-back direction, so around this point, the direction in which the pair of movable plates 25 are pulled and rotated by the pair of springs 26 reverses. Then, due to the reversal of the force acting from the pair of springs 26, the pair of movable plates 25 continue to rotate in the direction of arrow A2. As a result, the push button 21 moves to the operating position in conjunction with the pair of movable plates 25, and the movable element 22, which is pressed by the outer end 252, rotates. At this time, the movable element 22 rotates in the direction of arrow A3, such that its upper end moves backward (in the positive direction of the Y-axis) around the rotation axis Ax1. In other words, the movable element 22 moves from the first position to the second position. As a result, the pusher 473 of the contact portion 47 is pushed at the upper end of the movable element 22, and the movable contact 472 comes into contact with the fixed contact 471. Consequently, the contact portion 47 turns on.

[0078] On the other hand, when the push button 21 is in the operating position, the reset button 23 protrudes forward (in the negative direction of the Y axis) from the front surface of the annular plate 241. In this state, when the reset button 23 is pressed, the reset button moves backward (in the positive direction of the Y axis), and the pair of movable plates 25 rotate accordingly. At this time, the pair of movable plates 25 rotate in the opposite direction to arrow A2 such that each tongue piece 251 moves forward (in the negative direction of the Y axis) and each outer end 252 moves backward (in the positive direction of the Y axis). Then, due to the reversal of the force acting on the pair of movable plates 25 from the pair of springs 26, the push button 21 moves to the steady position in conjunction with the pair of movable plates 25, and the outer end 252 separates from the movable element 22. At this time, the movable element 22 is pushed back by the elastic force of the movable contact 472 and rotates in the opposite direction to arrow A3, so that its upper end moves forward (in the negative direction of the Y-axis) around the rotation axis Ax1. In other words, the movable element 22 moves from the second position to the first position. As a result, the force applied from the movable element 22 to the pusher 473 of the contact part 47 is released, and the movable contact 472 separates from the fixed contact 471. Consequently, the contact part 47 turns off.

[0079] As shown in Figure 8, the activation unit 2 configured in this way is attached to the front wall (cover 12) of the housing 1 from the rear side. That is, the activation unit 2 is attached to the front wall of the housing 1 such that at least a portion of it faces the rear surface of the front wall (cover 12) of the housing 1. At this time, the activation unit 2 is fixed to the cover 12 with a plurality of screws 29, with at least the protruding portion 243 of the base member 24 facing the area around the through hole 121 on the rear surface of the cover 12. Here, the base member 24 (protruding portion 243) is attached to the cover 12 such that a portion of the indicator light 3 is sandwiched between it and the cover 12, as described above.

[0080] As a result, the activation unit 2 and indicator light 3, while attached to the cover 12, are exposed to the front side of the cover 12 (the front surface 101 of the housing 1) through the through hole 121. At least the push button 21 (operating surface 211) and the annular plate 241 of the activation unit 2 are exposed to the front surface 101 through the through hole 121.

[0081] (2.4) Configuration of indicator lights Next, the configuration of indicator light 3 will be explained with reference to Figures 6, 8 to 10.

[0082] As shown in Figure 6, the indicator light 3 further includes a light source unit 32 and a light guide member 33 in addition to the light-emitting unit 311. The light source unit 32 is housed within the housing 1. The light guide member 33 guides light from the light source unit 32 to the light-emitting unit 311, thereby causing the light-emitting unit 311 to emit light.

[0083] In this embodiment, the indicator light 3 has a light body cover 31 that includes a light-emitting part 311. In other words, the light-emitting part 311 is part of the light body cover 31. Furthermore, in this embodiment, the indicator light 3 further includes an intermediate member 34 and a diffusion member 35.

[0084] The lamp body cover 31 is formed in an annular shape when viewed from the front. Here, the lamp body cover 31 is fixed to the cover 12 of the housing 1 such that the light-emitting part 311 is exposed to the front surface 101 side of the housing 1. In other words, the part of the lamp body cover 31 that is exposed to the front surface 101 side of the housing 1 while fixed to the housing 1 constitutes the light-emitting part 311. The lamp body cover 31 includes a peripheral part 312 that protrudes outward from the light-emitting part 311, and the peripheral part 312 is fixed to the cover 12 of the housing 1 together with the activation unit 2.

[0085] In other words, in this embodiment, as described above, the base member 24 (protruding portion 243) of the activation unit 2 is attached to the cover 12 such that a part of the indicator light 3 (peripheral portion 312) is sandwiched between it and the cover 12 (see Figure 8). Therefore, the light body cover 31 of the indicator light 3 is sandwiched between the base member 24 of the activation unit 2 and the cover 12, and is fixed to the housing 1 together with the activation unit 2. With the light body cover 31 fixed to the housing 1, at least the light-emitting portion 311 is exposed to the front 101 side through the through hole 121. Thus, the indicator light 3 has a light body cover 31 including the light-emitting portion 311. The activation unit 2 is attached to the front wall of the housing 1 (cover 12) with the light body cover 31 sandwiched between it and the front wall of the housing 1.

[0086] Of the lamp body cover 31, at least the portion that functions as the light-emitting part 311 is translucent, and light from the light guide member 33 is output forward (in the negative direction of the Y axis) through the light-emitting part 311. As a result, the light-emitting part 311 emits light, and a person viewing the indicator light 3 from the front will see an annular light. In this embodiment, as an example, the lamp body cover 31 is made of a translucent, red-colored resin such as PC resin, ASA resin, PC / ABS alloy resin, or ABS resin.

[0087] A through-hole 313 is formed in the central part of the light body cover 31, on the inside of the light-emitting part 311, to expose the activation unit 2 (push button 21 and annular plate 241). As a result, when the indicator light 3 is combined with the activation unit 2, the operating surface 211 of the push button 21 and the annular plate 241 are exposed on the front side of the light body cover 31 through the through-hole 313.

[0088] In this configuration, when the indicator light 3 is fixed to the housing 1 (cover 12) together with the activation unit 2, the light-emitting portion 311 of the indicator light 3 is flush with at least the area surrounding the light-emitting portion 311 on the front surface 101 of the housing 1 (cover 12). In other words, the front surface of the light-emitting portion 311 that is exposed to the front surface 101 side of the cover 12 through the through hole 121 is flush with the area surrounding the through hole 121 on the front surface 101. In this embodiment, since the front surface 101 of the housing 1 is a flat surface, substantially the entire front surface 101 of the housing 1 is flush with the light-emitting portion 311 of the indicator light 3.

[0089] Furthermore, the light-emitting portion 311 of the indicator light 3 is flush with the operating surface 211 of the push button 21. In other words, at least the operating surface 211 of the push button 21 and the annular plate 241, which are exposed on the front side of the light body cover 31 through the through hole 313, is flush with the front surface of the light-emitting portion 311 of the indicator light 3. Also, in this embodiment, the annular plate 241 located between the light-emitting portion 311 and the operating surface 211 in a front view is flush with the light-emitting portion 311. In other words, the annular plate 241 exposed on the front side of the light body cover 31 through the through hole 313 is also flush with the front surface of the light-emitting portion 311 of the indicator light 3.

[0090] Therefore, in this embodiment, the light-emitting part 311, the annular plate 241, and the operating surface 211, which are exposed on the front surface 101 side of the cover 12 through the through hole 121, are flush (on approximately the same plane). Furthermore, since the light-emitting part 311 and the front surface 101 of the housing 1 are flush, as a result, the front surface 101 of the housing 1, the light-emitting part 311, the annular plate 241, and the operating surface 211 are all flush. With this shape, there is no protrusion from the front surface 101 of the housing 1, so in the alarm device 10 according to this embodiment, the amount of protrusion (height) L3, L4 from the wall W1 to which it is mounted can be kept relatively small (see Figures 4B and 4C). Moreover, since there is no recess on the front surface 101 of the housing 1, the internal space of the housing 1 can be effectively utilized to accommodate the activation unit 2 and indicator light 3, and the dimensions of the housing 1 itself can be kept relatively small. Furthermore, because no recess is formed on the front surface 101 of the housing 1, dirt is less likely to accumulate on the front surface 101 of the housing 1, which reduces the maintenance effort required for the alarm device 10.

[0091] As described above, the light-emitting part 311 is positioned on the front surface 101 of the housing 1. The light-emitting part 311 is an annular shape that surrounds the operating surface 211 when viewed from the front. In this disclosure, "annular" means any shape that generally surrounds the operating surface 211 of the push button 21, and is not limited to a closed loop shape that is continuous over the entire length of the operating surface 211 in the circumferential direction, but may also be a shape in which a part of the circumferential direction is open, for example. Furthermore, "annular" is not limited to a circular shape (annular), but may also be an elliptical shape, a polygonal shape, etc.

[0092] In this embodiment, the light-emitting part 311 is formed in an annular shape with a diameter larger than that of the annular plate 241. In other words, in a front view, the annular plate 241 and the push button 21 (operating surface 211) of the activation unit 2 are located inside the light-emitting part 311. In this state, when the indicator light 3 is combined with the activation unit 2, in a front view, the activation unit 2 is located in the area surrounded by the light-emitting part 311 of the indicator light 3. Therefore, when the indicator light 3 lights up and the light-emitting part 311 emits light, the position of the activation unit 2 is clearly indicated.

[0093] In particular, in this embodiment, the operating surface 211 is located at the center of the area surrounded by the light-emitting part 311. That is, in this embodiment, the operating surface 211 of the push button 21 is located at the center of the front surface of the annular plate 241. Moreover, the operating surface 211 of the push button 21 is circular in shape with a smaller diameter than the inner circumference of the annular plate 241. The annular light-emitting part 311 is located around the annular plate 241. Here, the operating surface 211 is concentric with the light-emitting part 311. In short, in this embodiment, in a front view, the center point of the operating surface 211 of the push button 21 and the center point of the annular light-emitting part 311 coincide. Therefore, the operating surface 211 of the push button 21, the annular plate 241, and the light-emitting part 311 are concentric.

[0094] Furthermore, in a front view, the annular plate 241 located between the light-emitting part 311 and the operating surface 211 has a hole 246 formed therein for exposing the reset button 23, as described above. Therefore, in a front view, the reset button 23 is positioned between the light-emitting part 311 and the operating surface 211. Thus, the reset button 23, together with the operating surface 211 of the push button 21, is surrounded by the annular light-emitting part 311.

[0095] Furthermore, an annular groove 314 is formed on the rear side of the lamp body cover 31 when viewed from the rear. A light guide member 33 is housed in the groove 314. The light guide member 33 is formed in an annular shape along the outer edge of the front surface of the lamp body cover 31 so that it emits light over almost the entire area of ​​the light-emitting part 311. The light guide member 33 outputs light forward (in the negative direction of the Y axis), so that, as described above, the light from the light guide member 33 is output forward through the light-emitting part 311 of the lamp body cover 31.

[0096] Here, the light guide member 33 is fixed to the cover 12 of the housing 1 by being sandwiched between the lamp body cover 31 and the activation unit 2 while housed in the groove 314. In other words, in this embodiment, the indicator lamp 3 has a lamp body cover 31. The lamp body cover 31 includes a light-emitting part 311. The activation unit 2 holds the light guide member 33 by sandwiching it between itself and the lamp body cover 31. In this embodiment, as described above, the activation unit 2 is attached to the front wall of the housing 1 such that at least a part of it (the protruding portion 243 of the base member 24) faces the rear surface of the front wall (cover 12) of the housing 1. Therefore, as shown in Figure 8, the activation unit 2 is fixed to the cover 12 together with the lamp body cover 31 by sandwiching the lamp body cover 31 between at least the protruding portion 243 of the base member 24 and the area around the through hole 121 on the rear surface of the cover 12. At this time, the light guide member 33 is held in place by sandwiching it between the protruding portion 243 of the base member 24 and the lamp body cover 31.

[0097] As shown in Figure 10, the light source unit 32 has multiple (in this case, four) light-emitting elements 321. These four light-emitting elements 321 are arranged in a matrix in a front view, with two in the vertical direction (Z-axis direction) and two in the horizontal direction (X-axis direction). Figure 10 shows the relative positional relationship between the light source unit 32, the intermediate member 34, and the light guide member 33. In Figure 10, the lamp body cover 31 including the light-emitting section 311 is shown by dashed lines.

[0098] In this embodiment, as an example, each of the multiple light-emitting elements 321 consists of a surface-mount type chip LED (Light Emitting Diode) that outputs red light. As shown in Figure 6, the multiple light-emitting elements 321 are arranged (mounted) on the front surface of the substrate body 41 of the circuit board 4. Therefore, when power is supplied to the light source unit 32 through the wiring conductor on the substrate body 41, the multiple light-emitting elements 321 emit light, and red light is output from the multiple light-emitting elements 321.

[0099] The intermediate member 34 is a component that guides light from the light source unit 32, which is provided on the circuit board 4, to the light guide member 33. The intermediate member 34 is, for example, a molded product of a transparent resin such as acrylic resin, and is a component that takes in the output light from the light source unit 32 and guides it through the inside of the intermediate member 34 to the light guide member 33, in other words, it is a light guide component.

[0100] In this embodiment, the intermediate member 34 and the light guide member 33 are separate entities. That is, the intermediate member 34 and the light guide member 33 are physically separated. In this embodiment, the light guide member 33 is fixed to the cover 12 of the housing 1 together with the lamp body cover 31, and the intermediate member 34 is fixed to the body 11 of the housing 1, for example. As a result, the intermediate member 34 is positioned to face the light guide member 33 (incident portion 331, described later) only after the body 11 and the cover 12 are assembled, and the intermediate member 34 is able to guide light from the light source 32 to the light guide member 33.

[0101] Furthermore, as shown in Figure 10, the intermediate member 34 has a first light guide section 341 and a second light guide section 342. The first light guide section 341 guides light from the light source section 32 along an axis (Y-axis) perpendicular to the front surface 101 of the housing 1. The second light guide section 342 guides the light output from the first light guide section 341 along the front surface 101 of the housing 1. In other words, the intermediate member 34 is formed in a substantially L-shape overall by the first light guide section 341 and the second light guide section 342. As a result, the intermediate member 34 can guide light from the light source section 32 forward (negative direction of the Y-axis) and further downward (negative direction of the Z-axis).

[0102] Furthermore, the intermediate member 34 has a reflective surface 343 at the joint between the first light guide section 341 and the second light guide section 342. The reflective surface 343 reflects light incident from the first light guide section 341 toward the second light guide section 342. The reflective surface 343 is an inclined surface tilted at an angle of approximately 45 degrees with respect to the horizontal plane, such that it is located downward (in the negative direction of the Z axis) as it approaches the front end. Therefore, light passing through the interior of the intermediate member 34 is reflected downward by the reflective surface 343 at the joint between the first light guide section 341 and the second light guide section 342. This makes it possible to efficiently guide the light passing through the intermediate member 34.

[0103] The diffusion member 35 is positioned between the front surface of the light guide member 33 and the lamp body cover 31. The diffusion member 35 has light-diffusing and light-transmitting properties. The diffusion member 35 is, for example, a molded product of light-transmitting PC resin or the like that includes a transmissive light-diffusing member, and is formed in an annular shape that covers the front surface of the light guide member 33. As a result, the light emitted forward from the front surface of the light guide member 33 is diffused and transmitted through the diffusion member 35, and further transmitted through the lamp body cover 31, so that it is emitted forward from at least a part of the front surface of the lamp body cover 31. At this time, in a front view, the part of the front surface of the lamp body cover 31 that overlaps with the diffusion member 35 in the front-to-back direction will appear to light up, and this part will function as a light-emitting part 311. In other words, at least a part of the lamp body cover 31 that houses the light guide member 33 has light-transmitting properties and constitutes a light-emitting part 311.

[0104] The configuration of the light guide member 33 will be described in more detail below.

[0105] As described above, the light guide member 33 is housed in the space between the lamp cover 31 and the base member 24 (protruding portion 243) of the activation unit 2. Here, the lamp cover 31 that covers the front of the light guide member 33 is a translucent resin molded product colored red. On the other hand, the base member 24 (protruding portion 243) that covers the rear of the light guide member 33 is an opaque resin molded product colored red.

[0106] The light guide member 33 is, for example, a molded product of a transparent resin such as acrylic resin, and is a member that takes in the output light from the light source unit 32 and guides it through the inside of the light guide member 33 to the light-emitting unit 311, in other words, it is a light guide member. The light guide member 33 is located behind the light-emitting unit 311 and is formed in an annular shape that overlaps with the light-emitting unit 311 in the front-to-back direction. In this embodiment, since the light-emitting unit 311 is an annular region formed on the inner circumference side of the front surface of the lamp body cover 31, the light guide member 33 is formed in an annular shape similar to that of the light-emitting unit 311.

[0107] The light guide member 33 takes in the output light from the light source unit 32 from one point in the circumferential direction of the light-emitting unit 311 (the lower end in this embodiment), guides the light in the circumferential direction of the light guide member 33, and outputs it from the front surface of the light guide member 33.

[0108] As shown in Figure 9, the light guide member 33 has an incident portion 331, a cylindrical body portion 332, and an outgoing portion 333. The incident portion 331 is a part for taking in light from the light source portion 32 into the cylindrical body portion 332, and is provided at the upper end of the cylindrical body portion 332. That is, the light guide member 33 has an incident portion 331 at one location (lower end) in the circumferential direction of the light-emitting portion 311 into which light from the light source portion 32 enters. The outgoing portion 333 is a part for extracting light from the cylindrical body portion 332, and is provided in front of the cylindrical body portion 332. In this embodiment, the outgoing portion 333 is an annular shape in front view and consists of a plate-shaped member with the front-to-back direction as the thickness direction. The cylindrical body portion 332 is formed integrally with the outgoing portion 333 in such a way that it protrudes rearward from the rear surface of the outgoing portion 333.

[0109] The incident portion 331 protrudes from a part of the outer circumferential surface of the cylindrical portion 332. In this embodiment, the incident portion 331 protrudes upward (in the positive Z-axis direction) from the upper end of the outer circumferential surface of the cylindrical portion 332. The second light guide portion 342 of the intermediate member 34 is positioned opposite the tip surface (upper surface) of the incident portion 331. The intermediate member 34 is positioned above the incident portion 331 in a direction that outputs light toward the incident portion 331. As a result, light output from the light source portion 32 enters the incident portion 331 through the intermediate member 34.

[0110] As described above, in this embodiment, the light guide member 33 has an incident portion 331. The incident portion 331 is the part of the light guide member 33 into which light from the light source unit 32 enters. The light source unit 32 is provided on the circuit board 4. The intermediate member 34 guides the light from the light source unit 32 to the incident portion 331. Therefore, even if the circuit board 4 on which the light source unit 32 is provided and the light guide member 33 are separated, the presence of the intermediate member 34 between them allows light from the light source unit 32 to enter the light guide member 33 through the intermediate member 34. In this way, the intermediate member 34 forms an optical path from the light source unit 32 to the light guide member 33.

[0111] Here, the light guide member 33 is configured to guide light from the light source unit 32 in both directions around the circumferential direction of the light guide member 33 when viewed from the front. In this embodiment, as described above, an incident part 331 for taking in light from the light source unit 32 into the cylindrical body 332 is provided at the upper end of the cylindrical body 332. Therefore, the light introduced into the cylindrical body 332 from the incident part 331 is divided into light (ray beam) traveling in a clockwise optical path and light (ray beam) traveling in a counterclockwise optical path when viewed from the rear, and reaches the lower end of the cylindrical body 332. In reality, the light traveling through each optical path travels inside the cylindrical body 332 while repeatedly reflecting off the inner and outer circumferential surfaces of the cylindrical body 332.

[0112] Furthermore, the light guide member 33 is further equipped with an optical mirror 334 (see Figure 9) that converts light incident on the light guide member 33 from the light source unit 32 into light oriented along the circumferential direction of the light guide member 33. In this embodiment, as described above, the light guide member 33 is provided with a pair of optical mirrors 334 in order to divide the light introduced from the incident unit 331 to the cylindrical unit 332 into two optical paths and guide the light. The pair of optical mirrors 334 are provided on the outer circumferential surface of the cylindrical unit 332 at a position that is the back surface of the incident unit 331, and consist of a pair of planes that are substantially V-shaped and open downwards when viewed from the front. Each of the pair of optical mirrors 334 has a mirror-finished surface and is inclined at an angle of approximately 45 degrees with respect to the front end surface (top surface) of the incident unit 331, and the pair of optical mirrors 334 intersect each other at an angle of approximately 90 degrees. As a result, the light incident from the light source unit 32 to the incident unit 331 is reflected by one of the pair of optical mirrors 334 in a direction along the circumferential direction of the light guide member 33 (to the right or to the left), and is distributed to one of the two optical paths.

[0113] Here, the rear surface of the light guide member 33 (the rear surface of the cylindrical portion 332) is inclined with respect to the front surface of the light guide member 33 such that the thickness of the light guide member 33 decreases in the front-to-back direction as it moves away from the light source unit 32 (light-emitting element 321). Therefore, the dimensions of the cylindrical portion 332 in the front-to-back direction of the light guide member 33 are not constant, and the dimensions of the cylindrical portion 332 in the front-to-back direction become smaller as it moves away from the incident portion 331, that is, as it approaches the lower end of the cylindrical portion 332.

[0114] Furthermore, the light guide member 33 has a plurality of light guide grooves 335 formed on its rear surface (the rear surface of the cylindrical portion 332). The plurality of light guide grooves 335 are grooves formed to extend radially from the center point of the cylindrical portion 332 in a front view, and the bottom surface of each is mirror-finished. These plurality of light guide grooves 335 are formed to be arranged at approximately equal intervals around both sides of the circumferential direction of the cylindrical portion 332 when viewed from the incident portion 331. The inner surface of each of the plurality of light guide grooves 335, which is farther from the incident portion 331, is formed in a sawtooth shape that is approximately perpendicular to the circumferential direction of the cylindrical portion 332. Furthermore, the plurality of light guide grooves 335 are not identical in shape, and are configured so that the light guide grooves 335 become deeper as they move away from the incident portion 331.

[0115] With the configuration described above, the light guide member 33 can efficiently reflect light incident on the rear surface of the cylindrical body 332 forward at the bottom surface of the light guide groove 335, thereby improving the efficiency of light extraction from the output section 333 at the front of the cylindrical body 332. Moreover, since the light guide groove 335 becomes deeper the further it is from the incident section 331, variations in brightness due to differences in distance from the incident section 331 can be kept to a minimum.

[0116] In this embodiment, a light-diffusing and light-transmitting diffuser 35 is provided between the front surface of the light guide member 33 and the lamp cover 31 (light-emitting part 311). Therefore, the light guide member 33 employs the following configuration so that light is incident as uniformly as possible on the entire rear surface of the diffuser 35.

[0117] In other words, as shown in Figure 10, the emission portion 333 of the light guide member 33 is set to have a larger dimension in the radial direction (hereinafter also referred to as the "width direction") of the cylindrical portion 332 compared to the cylindrical portion 332. Furthermore, a V-shaped groove 336 is formed on the front surface of the emission portion 333, extending around the entire circumference of the emission portion 333. The bottom surface of the groove 336 is mirror-finished. As a result, the emission portion 333 can spread the light incident from the cylindrical portion 332 in the width direction.

[0118] In other words, the light incident from the cylindrical portion 332 to the emission portion 333 is reflected from the bottom surface of the groove 336 toward both sides in the width direction, and further reflected toward the front at both end faces in the width direction of the emission portion 333. As a result, light is extracted from almost the entire width direction of the emission portion 333, and light is incident as uniformly as possible on the entire rear surface of the diffusion member 35. Since the light incident on the diffusion member 35 is diffused as it passes through the diffusion member 35, the front surface of the diffusion member 35 emits light almost uniformly over its entire surface. In other words, the front surface of the diffusion member 35 emits light from a surface.

[0119] With the above configuration, while the annular light-emitting part 311 emits light when viewed from the front, the output light from the light source unit 32 does not directly enter the light-emitting part 311, but rather enters the light-emitting part 311 via the light guide member 33. Therefore, a relatively uniform light emission state can be achieved in the circumferential direction of the light-emitting part 311. Moreover, since the annular light-emitting part 311, which is set in front of the diffusion member 35, emits light, a person viewing the indicator light 3 from the front will see an annular light. In reality, the front surface of the diffusion member 35, which is behind (rear of) the translucent light-emitting part 311, emits surface light, so when viewing the indicator light 3 from the front, it appears as if the inside of the light body cover 31 is shining, giving the light a deep, rich appearance.

[0120] (2.5) Internal organ configuration Next, the configuration of the internal unit 100 will be explained with reference to Figures 11 to 14.

[0121] In this disclosure, the internal components 100 include the body 11 of the housing 1 and components housed in the body 11 (such as the circuit board 4 and speaker 5). In other words, the internal components 100 are combined with the cover 12 together with the start unit 2 and indicator light 3.

[0122] As shown in Figure 11, the internal unit 100 includes a body 11, a circuit board 4, a speaker 5, a storage battery 7 (see Figure 13A), and a test operation unit 8.

[0123] As described above, the body 11 has a flat plate portion 111, a housing portion 112, and a back cover portion 113. The circuit board 4 and speaker 5, etc., are housed in the space enclosed by the flat plate portion 111, the housing portion 112, and the back cover portion 113. The housing portion 112 is cylindrical with at least its rear surface open and is integrated with the flat plate portion 111. The back cover portion 113 is fixed to the housing portion 112 with several (seven in this case) screws 114.

[0124] The circuit board 4 comprises a main board body 41 made of a printed wiring board and various electronic components mounted on the main board body 41. As shown in Figures 12A and 12B, the various electronic components mounted on the main board body 41 include a transformer 42, a capacitor 43, and several (three in this case) fuses 44, as well as contact parts 47, terminal parts 48, and connectors 49. Furthermore, a switch 82 is mounted on the main board body 41. The switch 82, together with the operator 81 (see Figure 11), constitutes the test operation unit 8.

[0125] The terminal section 48 includes a plurality of terminals 481 (six in this case). Each of the plurality of terminals 481 is a screw terminal. The terminal section 48 is located at the lower end of the front surface of the main board body 41. The plurality of terminals 481 are arranged in a row along the lower edge of the front surface of the main board body 41. Here, in the flat plate portion 111 of the body 11, a recessed "recess" is formed directly above the wire entry opening 115. At the bottom of this recess, a plurality of terminal holes 119 (six in this case) (see Figure 11) are formed that penetrate the body 11 (flat plate portion 111) in the front-to-back direction. When the circuit board 4 is assembled to the body 11, the plurality of terminals 481 are each exposed on the front side of the body 11 through the plurality of terminal holes 119. With this configuration, when the circuit board 4 is assembled to the body 11, the terminal section 48 is exposed on the front surface of the body 11 at a position facing the wire entry opening 115. Therefore, wiring that has been pulled through the wiring opening 115 to the front side of the body 11 can be connected to the terminal section 48.

[0126] Connector 49 is a connector for electrically connecting the storage battery 7. Connector 49 is located at the upper end of the front surface of the circuit board body 41. A circular hole 411 is formed below the connector 49 on the circuit board body 41.

[0127] The speaker 5 is housed in a speaker mounting section 116 on the rear surface of the body 11. The speaker mounting section 116 is located within a housing section 112. A hole is formed in the bottom surface of the speaker mounting section 116 that penetrates the body 11 (flat plate section 111) in the front-to-back direction. The speaker 5 is fixed to the body 11 by several screws (two in this case) 53 with a baffle ring 51 sandwiched between it and the bottom surface of the speaker mounting section 116. Preferably, the front surface of the speaker 5 is covered with a waterproof sheet, in which case the waterproof sheet is fixed by being sandwiched between, for example, the baffle ring 51 and the body 11.

[0128] The rear of the speaker 5 is inserted into the round hole 411 of the circuit board body 41. As a result, when the speaker 5 and circuit board 4 are housed in the housing 112, the rear of the speaker 5 protrudes from the rear surface of the circuit board 4 through the round hole 411. The rear surface of the speaker 5 is pressed against the back cover portion 113 via the baffle plate 52.

[0129] Furthermore, a sound output hole 122 (see Figure 8) is formed in the cover 12 at a position facing the speaker 5. In addition, a first sheet 124 with numerous tiny holes is attached to the front surface 101 of the cover 12 so as to cover the sound output hole 122 (see Figure 8). As a result, the sound output from the speaker 5 is output to the outside of the housing 1 from near the first sheet 124 on the front surface 101 of the housing 1.

[0130] The test operation unit 8 has an operator 81 and a switch 82. The operator 81 penetrates the body 11 and protrudes from the front side of the body 11. In addition, a rectangular hole 123 (see Figure 8) is formed in the cover 12 at a position opposite to the operator 81. Furthermore, a second sheet 125 is attached to the front surface 101 of the cover 12 so as to cover the rectangular hole 123 (see Figure 8). As a result, the operator 81 can be operated from outside the housing 1 through the second sheet 125 on the front surface 101 of the housing 1. When the operator 81 is pressed, the switch 82 is operated indirectly.

[0131] Furthermore, an operating hole 117 is formed in the body 11 (flat plate portion 111) at a position corresponding to the contact portion 47, and the hole penetrates the body 11 in the front-to-back direction. The plunger 473 of the contact portion 47 is inserted into the operating hole 117. This makes it possible to operate the contact portion 47 (movable contact 472) on the circuit board 4 from the front side of the body 11.

[0132] The contact section 47 is turned on when an external force is applied to the plunger 473, causing the pair of movable contacts 472 to move to the contact position against their elastic force. When the contact section 47 is turned on, the circuit board 4 outputs an alarm signal. At this point, an external force is applied to the plunger 473 as the movable element 22 of the activation unit 2 moves from the first position to the second position. Therefore, the movement of the movable element 22 from the first position to the second position triggers the output of the alarm signal. The speaker 5 then receives the alarm signal and outputs an alarm sound.

[0133] As shown in Figure 13A, a battery compartment 118 is formed at the upper end of the front surface of the body 11. The battery compartment 118 is a recessed area that is recessed to the rear and houses the storage battery 7. When the cover 12 is attached to the body 11, the front of the battery compartment 118 is covered by the cover 12. Therefore, the storage battery 7 in the battery compartment 118 is housed in the housing 1, sandwiched between the body 11 and the cover 12. Below the battery compartment 118, the connector 49 on the circuit board 4 is exposed. Therefore, the cable connecting the storage battery 7 in the battery compartment 118 and the connector 49 can be made relatively short.

[0134] Furthermore, as shown in Figures 13A to 13C, the internal unit 100 has, in addition to the wiring port 115, a plurality (four in this case) of mounting holes 141 and a plurality (four in this case) of fixing holes 142 that penetrate the body 11 in the front-to-back direction (Y-axis direction). In addition, the internal unit 100 has a plurality (two in this case) of hooking holes 143 that penetrate the body 11 in the front-to-back direction (Y-axis direction). The plurality of mounting holes 141 are used to attach the body 11 (housing 1) to the mounting box 6 in exposed installation. The plurality of mounting holes 141 are used to attach the body 11 (housing 1) to the switch box B1 (see Figure 4C) in recessed installation. The plurality of hooking holes 143 are used to temporarily hold the body 11 (housing 1) in the mounting box 6 in exposed installation. Mounting holes 141, fixing holes 142, and hooking holes 143 are formed on the portion of the flat plate portion 111 that protrudes outward from the housing portion 112, specifically at both ends of the flat plate portion 111 in the left-right direction (X-axis direction). Furthermore, the inner container 100 has multiple (four in this case) holding portions 16 at both ends of the flat plate portion 111 in the left-right direction (X-axis direction) for mechanically connecting the cover 12 and the body 11.

[0135] Furthermore, an insert nut 132 is positioned in the center of the lower end of the front surface of the body 11 (below the wire passage opening 115). The cover 12 is fixed to the body 11 by tightening a screw 131 through the cover 12 onto this insert nut 132.

[0136] Furthermore, as will be explained in more detail in section (2.7) Waterproof Structure, the body 11 has a first visor 151 and a second visor 152 formed therein as a waterproof structure to prevent liquid from adhering to the circuit board 4, etc. The first visor 151 and the second visor 152 are formed on the front surface of the body 11.

[0137] Figure 14 is a schematic diagram showing the positional relationships of the components of the internal unit 100. In Figure 14, the flat plate portion 111 and the housing portion 112 of the body 11 are not shown, and the circuit board 4, speaker 5, storage battery 7, and back cover portion 113 are shown. As is clear from Figure 14, the storage battery 7 is located above the circuit board 4 (in the positive direction of the Z axis). That is, the storage battery 7 housed in the housing 1 and the circuit board 4 are arranged side by side in one direction (in this case, the vertical direction) along the front surface 101 of the housing 1. In other words, in this embodiment, as described above, the storage battery 7 is housed in the battery housing portion 118, which is a recess formed at the upper end of the front surface of the body 11, so the storage battery 7 is located above the circuit board 4 housed in the housing portion 112.

[0138] In this way, by arranging the battery 7 and the circuit board 4 side by side in one direction along the front surface 101 of the housing 1, the housing 1 can be made lower in height compared to the case where the battery 7 and the circuit board 4 overlap in the front-to-back direction (Y-axis direction). In other words, the battery 7 is particularly tall (large in the front-to-back direction) among the components of the internal unit 100, and by arranging the circuit board 4 within the height of the battery 7, the front-to-back dimensions of the housing 1 that houses the battery 7 and the circuit board 4 can be kept relatively small. As a result, the housing 1 can be made lower in height compared to the case where the battery 7 and the circuit board 4 are arranged side by side in the front-to-back direction, and the "low-profile design" described above is realized.

[0139] Furthermore, the speaker 5 is positioned so as to overlap a portion of the circuit board 4 in the front-to-back direction (Y-axis direction). In other words, as described above, the speaker 5 is assembled to the circuit board 4 from the front (negative Y-axis direction) by inserting its rear end into the round hole 411 (see Figure 12B) of the main board body 41. Specifically, the speaker 5 is positioned so as to overlap the upper half of the circuit board 4 (above the center in the vertical direction) when viewed from the front. With this arrangement, the battery 7 will be positioned above the speaker 5. In other words, since the battery 7 is positioned above the circuit board 4 as described above, even when considering the relative positional relationship between the speaker 5, which overlaps a portion of the circuit board 4 in the front-to-back direction, the battery 7 will be positioned above the speaker 5.

[0140] Furthermore, the terminal portion 48 is positioned at the lower end of the front surface of the circuit board body 41 such that it is exposed on the front surface of the body 11 facing the wiring opening 115. In other words, the circuit board 4 has a terminal portion 48 at the lower end of the circuit board 4 for connecting wiring. With this arrangement of the terminal portion 48, it is possible to connect wiring that is pulled from below the terminal portion 48 to the front surface of the body 11 through the wiring opening 115 to the terminal portion 48. Therefore, it is easier to prevent liquids (such as water) from reaching the terminal portion 48 via the wiring.

[0141] (2.6) How to assemble the alarm device Next, the assembly method of the alarm device 10 will be explained with reference to Figures 15 to 21B. Here, we assume that the alarm device 10 is installed exposed using the mounting box 6.

[0142] The alarm device 10 is broadly divided into three blocks: a cover 12 to which the activation unit 2 and indicator light 3 are attached, an internal unit 100, and a mounting box 6. When installing the alarm device 10, these three blocks (cover 12, internal unit 100, and mounting box 6) are assembled as shown in Figure 15.

[0143] In other words, the internal unit 100 is assembled to the mounting box 6 in such a way that it closes the front of the mounting box 6. Specifically, the internal unit 100 is mechanically coupled to the mounting box 6 by the flat plate portion 111 of the body 11, which closes the opening surface (front) of the mounting box 6. At this time, a part of the internal unit 100 (such as the housing portion 112 and the back cover portion 113) will be housed inside the mounting box 6.

[0144] Subsequently, the cover 12, with the starter unit 2 and indicator light 3 attached, is assembled to the internal unit 100 so as to cover the front of the body 11. This mechanically connects the cover 12 to the body 11, forming the housing 1 consisting of the body 11 and the cover 12. At this time, at least the starter unit 2 is exposed from the rear surface of the housing 1 (into the mounting box 6) through the wire passage 115 formed at the lower end of the body 11 (below the terminal portion 48).

[0145] Here, as shown in Figure 15, the rear surface of the starting unit 2 is not in contact with the internal container 100, and a gap G1 is secured between the starting unit 2 and the internal container 100. Therefore, the cover 12 together with the starting unit 2 is not pushed forward by the internal container 100 coming into contact with the rear surface of the starting unit 2, and distortion or lifting of the cover 12 caused by mounting tolerances of the starting unit 2 can be suppressed.

[0146] The coupling structure between the internal unit 100 and the mounting box 6 will be explained in more detail below with reference to Figures 16 to 18B.

[0147] In other words, the mounting box 6 is formed in the shape of a box with an open front, as shown in Figure 16. In a front view, the mounting box 6 is longer in the vertical direction (Z-axis direction) than in the horizontal direction (X-axis direction), that is, it is formed in the shape of a vertically elongated rectangle. The mounting box 6 has a plurality of (four in this case) fixing bosses 62 and a plurality of (two in this case) temporary holding parts 63. The plurality of fixing bosses 62 are used to fix the inner container 100 to the mounting box 6. The plurality of fixing bosses 62 protrude forward from the four corners of the front surface of the rear wall of the mounting box 6. The plurality of temporary holding parts 63 are used to temporarily hold the inner container 100 to the mounting box 6. The plurality of temporary holding parts 63 protrude forward from the central part in the vertical direction (Z-axis direction) of both ends in the horizontal direction (X-axis direction) on the front surface of the rear wall of the mounting box 6. In other words, one of the two temporary holding parts 63 is located between two fixing bosses 62 provided at the right end of the front surface of the rear wall of the mounting box 6, and the other temporary holding part 63 is located between two fixing bosses 62 provided at the right end of the front surface of the rear wall of the mounting box 6.

[0148] When the internal unit 100 is assembled to the mounting box 6, as shown in Figure 17, in a front view, the internal unit 100 overlaps with almost the entire area of ​​the mounting box 6. Here, the multiple fixing bosses 62 are positioned in a one-to-one correspondence with the multiple mounting holes 141 formed in the body 11. Also, the multiple temporary holding parts 63 are positioned in a one-to-one correspondence with the multiple hook holes 143 formed in the body 11. Therefore, by inserting each temporary holding part 63 of the mounting box 6 into each hook hole 143 of the body 11, the internal unit 100 (body 11) is temporarily held in place by the mounting box 6. Furthermore, in the state shown in Figure 17, by tightening screws through each mounting hole 141 of the body 11 to each fixing boss 62 of the mounting box 6, the internal unit 100 (body 11) is fixed to the mounting box 6.

[0149] More specifically, as shown in Figure 18A, the temporary holding portion 63 has a first piece 631 extending forward (in the negative direction of the Y-axis) from the rear wall of the mounting box 6, and a second piece 632 extending upward (in the positive direction of the Z-axis) from the tip of the first piece 631. In other words, the temporary holding portion 63 is formed as a whole in a roughly L-shape when viewed from the side by the first piece 631 and the second piece 632. When the internal unit 100 is assembled to the mounting box 6, such a temporary holding portion 63 is inserted into the hook hole 143 of the body 11. At this time, the second piece 632 of the temporary holding portion 63 catches on the periphery of the opening of the hook hole 143 in the body 11, preventing the body 11 from falling out of the mounting box 6. In this way, the temporary holding part 63 temporarily holds the housing 1 (body 11) by hooking onto the housing 1 (body 11), thereby temporarily holding the internal component 100.

[0150] However, the temporary holding part 63 does not permanently fix the internal component 100 to the mounting box 6, but merely temporarily holds it. In this disclosure, "permanent fixing" means a state in which the internal component 100 is completely fixed so that it does not move relative to the mounting box 6. In this disclosure, "temporary holding" means a state in which the internal component 100 is held by the mounting box 6, but is still movable relative to the mounting box 6. In short, the temporary holding part 63 is merely hooked onto the housing 1 (body 11), and even when the internal component 100 (body 11) is temporarily held by the temporary holding part 63, it is still possible to move at least upward (in the positive Z-axis direction) relative to the mounting box 6.

[0151] Furthermore, as shown in Figure 18B, the fixed boss 62 has a screw hole 621 and a dowel pin 622 located below the screw hole 621. When the inner unit 100 is assembled to the mounting box 6, the screw hole 621 of the fixed boss 62 is located behind the mounting hole 141 of the body 11. In this embodiment, the mounting hole 141 is a "doll hole" in which a large diameter hole and a small diameter hole smaller than the large diameter hole are integrally formed. Therefore, by passing the head of the screw through the large diameter hole of the mounting hole 141, the inner unit 100 can be attached to and detached from the mounting box 6 even when the screw is only partially inserted into the screw hole 621.

[0152] Furthermore, the dowel pins 622 of the fixing bosses 62 are inserted into the mounting holes 141, as shown in Figure 18B, thereby restricting the movement of the internal component 100 in the left-right direction (X-axis direction) relative to the mounting box 6. Since these fixing bosses 62 are provided at the four corners of the mounting box 6, the tilting (rotation) of the internal component 100 relative to the mounting box 6 is suppressed when viewed from the front.

[0153] With this configuration, when a worker installing the alarm device 10 attaches the internal unit 100 to the mounting box 6, they can first hook the temporary holding part 63 onto the housing 1 (body 11) to temporarily hold the internal unit 100 in place in the mounting box 6. Then, with the internal unit 100 temporarily held in place, the worker can tighten a screw through the mounting hole 141 of the body 11 into the fixing boss 62 of the mounting box 6, thereby fixing (permanently fixing) the internal unit 100 (body 11) to the mounting box 6. Therefore, the worker does not need to hold the internal unit 100 with their hand when tightening the screw, improving work efficiency.

[0154] Furthermore, since the temporary holding portion 63 is located in the center of the mounting box 6 in the vertical direction (Z-axis direction), it has the function of preventing the internal component 100 (body 11) from lifting up relative to the mounting box 6 by hooking onto the internal component 100 (body 11). In other words, even when the body 11 is permanently fixed to the mounting box 6, the temporary holding portion 63 remains hooked onto the body 11. Therefore, for example, even if distortion occurs in the body 11 or the mounting box 6, the temporary holding portion 63 hooking onto the body 11 near the center of the mounting box 6 in the vertical direction prevents the body 11 from lifting up from the mounting box 6. As a result, it is possible to prevent an unnecessary gap from forming between the mounting box 6 and the internal component 100 (body 11).

[0155] The coupling structure between the inner container 100 and the cover 12 will be described in more detail below with reference to Figures 19 and 20.

[0156] In other words, as shown in Figure 19, the cover 12 is formed as a thin box with an open rear surface. In a front view, the cover 12 is longer in the vertical direction (Z-axis direction) than in the horizontal direction (X-axis direction), that is, it is formed as a vertically elongated rectangle. The cover 12 has a rib 18 that protrudes downward from the lower surface of its upper wall. The rib 18 extends in the horizontal direction and is formed in the area of ​​the lower surface of the upper wall of the cover 12, excluding both ends in the horizontal direction. This rib 18 forms a recess 181 (see Figure 23B) on the lower surface of the upper wall of the cover 12 that is open downward. As will be explained in detail in the section "(2.7) Waterproof Structure", the recess 181 consists of the area sandwiched between the rib 18 that protrudes downward from the rear end of the upper wall of the cover 12 and the front wall of the cover 12.

[0157] Furthermore, the cover 12 has a plurality of (four in this case) protrusions 126 that project inward from the inner circumferential surfaces of the right and left walls. The plurality of protrusions 126 are a structure for mechanically connecting the cover 12 and the body 11.

[0158] Here, with the cover 12 assembled to the inner container 100, the upper end 17 of the body 11 is inserted into the recess 181, as shown in Figure 19. In other words, the cover 12 has a recess 181 that opens downwards, and the cover 12 is attached to the body 11 with the upper end 17 of the body 11 inserted into the recess 181. As a result, when the cover 12 is assembled to the inner container 100, the ribs 18 of the cover 12 catch on the upper end 17 of the body 11, preventing the cover 12 from falling off the inner container 100 (body 11). Furthermore, in this state, if the screw 131 is tightened from the front side of the cover 12 to the insert nut 132 of the body 11, the cover 12 is fixed to the inner container 100 (body 11).

[0159] When the cover 12 is attached to the inner container 100, as shown in Figure 19, the inner container 100 overlaps with almost the entire surface of the cover 12 in a rear view. Here, the multiple protrusions 126 are positioned in a one-to-one correspondence with the multiple retaining parts 16 formed on the body 11. Therefore, the cover 12 is mechanically coupled to the body 11 by each protrusion 126 of the cover 12 catching on each retaining part 16 of the body 11. In other words, each retaining part 16 mechanically connects the body 11 and the cover 12 in a snap-fit ​​manner.

[0160] More specifically, as shown in Figure 20, the retaining portion 16 has a beam portion 161 and a projection 162 that protrudes outward from the beam portion 161. The beam portion 161 is elastic. When the cover 12 is fitted onto the body 11, the retaining portion 16 utilizes the elasticity of the beam portion 161 so that the projection 162 overcomes the projection 126 and catches on the projection 126. In this way, the retaining portion 16 mechanically connects the body 11 and the cover 12. In this embodiment, two retaining portions 16 are provided on each of the left and right sides of the flat plate portion 111. Therefore, when the cover 12 is attached to the body 11, the retaining portions 16 are covered by the cover 12 and are not visible from the front.

[0161] Here, the retaining portion 16 adjusts the bonding strength between the body 11 and the cover 12 by the shape of its projection 162, for example, the angle of inclination. In this embodiment, the bonding strength between the body 11 and the cover 12 by the retaining portion 16 is set to be relatively small. Therefore, the cover 12 is bonded to the body 11 in a removable manner.

[0162] Furthermore, since the retaining portion 16 is located near the center of the body 11 in the vertical direction (Z-axis direction), it has the function of preventing the cover 12 from lifting away from the inner container 100 by catching on the cover 12. Therefore, even if distortion occurs in the body 11 or the cover 12, the retaining portion 16 catches on the cover 12 near the center of the cover 12 in the vertical direction, which prevents the cover 12 from lifting away from the body 11. As a result, it is possible to prevent an unnecessary gap from forming between the cover 12 and the inner container 100 (body 11).

[0163] According to the configuration described above, both ends of the cover 12 in the longitudinal direction (up and down direction) when viewed from the front are fixed to the body 11 by a coupling structure. At least a portion between the ends of the cover 12 in the longitudinal direction (up and down direction) when viewed from the front is held by the body 11 by fitting into it. In this embodiment, the coupling structure is realized by a structure in which the upper end portion 17 of the body 11 is inserted into a recess 181, a screw 131 and an insert nut 132. Furthermore, the structure for holding the cover 12 to the body 11 by fitting into it is realized by a snap-fit ​​type holding part 16.

[0164] As mentioned above, in this embodiment, the light-emitting section 311, the annular plate 241, and the operating surface 211 are flush (on approximately the same plane). Furthermore, the light-emitting section 311 and the front surface 101 of the housing 1 are also flush. The configuration for making the front surface 101 of the housing 1, the light-emitting section 311, the annular plate 241, and the operating surface 211 flush will be explained with reference to Figures 21A and 21B. Figures 21A and 21B are cross-sectional views corresponding to the broken surface of Figure 15, showing only the cover 12, the lamp body cover 31, the base member 24, and the push button 21, and omitting the illustration of other members. Also, Figure 21A is a cross-sectional view of the cover 12, the lamp body cover 31, the base member 24, and the push button 21 in an exploded state, and Figure 21B is a cross-sectional view of the cover 12, the lamp body cover 31, the base member 24, and the push button 21 in an assembled state.

[0165] In other words, in this embodiment, as shown in Figure 21A, the following dimensional relationships are adopted for the four components: the cover 12, the lamp body cover 31, the base member 24, and the push button 21. First, if the thickness dimension around the through hole 121 in the front wall of the cover 12 is "D1", and the height from the front surface of the peripheral portion 312 of the lamp body cover 31 to the front surface of the light-emitting portion 311 is "D2", then the dimensional relationship "D1=D2" is established. Also, if the dimension in the front-to-back direction of the inner circumferential surface of the through hole 313 in the lamp body cover 31 is "D3", and the height from the front surface of the protruding portion 243 of the base member 24 to the front surface of the annular plate 241 is "D4", then the dimensional relationship "D3=D4" is established. Furthermore, if we define "D5" as the front-to-back dimension of the inner circumferential surface of the round hole 244 in the base member 24, and "D6" as the height of the step around the operating surface 211 of the push button 21, then the dimensional relationship "D5 = D6" is established.

[0166] Due to the above dimensional relationship, when the cover 12, lamp cover 31, base member 24, and push button 21 are assembled, the front surface 101 of the housing 1, the light-emitting part 311, the annular plate 241, and the operating surface 211 are flush, as shown in Figure 21B. In other words, according to the dimensional relationship "D1=D2", the front surface of the light-emitting part 311 exposed on the front surface 101 side of the cover 12 through the through hole 121 is flush with the area around the through hole 121 on the front surface 101. Furthermore, according to the dimensional relationship "D3=D4", the front surface of the annular plate 241 exposed on the front side of the lamp cover 31 through the through hole 313 is flush with the front surface of the light-emitting part 311 of the indicator light 3. And according to the dimensional relationship "D5=D6", the operating surface 211 of the push button 21 exposed on the front side of the base member 24 through the round hole 244 is flush with the front surface of the annular plate 241 on the base member 24.

[0167] (2.7) Waterproof structure Next, the waterproof structure of the alarm device 10 will be explained with reference to Figures 22A to 24B.

[0168] As explained in section (2.5) Internal Components, the components such as the circuit board 4 and speaker 5 are basically housed in a space enclosed by the flat plate portion 111, the housing portion 112, and the back cover portion 113. However, the circuit board 4 and other components are not placed in a completely sealed space; for example, at least the terminal portion 48 (multiple terminals 481) and the connector 49 of the circuit board 4 are exposed on the front side of the body 11. Also, the rear surface of the housing portion 112 is not sealed by the back cover portion 113, and there is a small gap between the rear surface of the housing portion 112 and the back cover portion 113.

[0169] Furthermore, when the alarm device 10 is installed and used outdoors, liquid (such as water) may adhere to the surface of the internal unit 100. Therefore, the internal unit 100 is fitted with a waterproof structure to prevent liquid from adhering to the circuit board 4, etc., by suppressing the ingress of liquid into predetermined areas. Specifically, the internal unit 100 (body 11) is provided with a first waterproof area WP1 and a second waterproof area WP2, which should prevent the ingress of liquid, as shown in Figures 22A and 22B. The first waterproof area WP1 is the area where the ingress of liquid should be suppressed, and the second waterproof area WP2 is the area where the ingress of liquid should be suppressed more reliably. In other words, the second waterproof area WP2 is required to have higher waterproof performance than the first waterproof area WP1. The shaded areas in Figures 22A and 22B schematically represent the first waterproof area WP1 and the second waterproof area WP2, respectively.

[0170] The first waterproof area WP1 is formed at both ends of the front surface of the body 11 in the left-right direction (X-axis direction). In the first waterproof area WP1, a waterproof structure is applied to prevent liquid adhering to the front surface of the body 11 from seeping around to the back side of the body 11 through the mounting holes 141 and fixing holes 142, etc. Specifically, as described above, a first eaves portion 151 is formed on the front surface of the body 11. The first eaves portion 151 is located above the mounting holes 141 and fixing holes 142 and has the function of making it difficult for liquid flowing along the front surface of the body 11 to penetrate into the mounting holes 141 and fixing holes 142. As a result, on the front surface of the body 11, the first waterproof area WP1, including the mounting holes 141 and fixing holes 142, is formed below the first eaves portion 151.

[0171] The second waterproof area WP2 is formed in the central part of the front surface of the body 11 in the left-right direction (X-axis direction). In the second waterproof area WP2, a waterproof structure is applied to prevent liquid adhering to the front surface of the body 11 from adhering to the circuit board 4. In other words, the second waterproof area WP2 is the area that includes the circuit board 4. Specifically, as described above, the second eaves portion 152 is formed on the front surface of the body 11. The second eaves portion 152 is located above the housing portion 112 and has the function of making it difficult for liquid flowing down the front surface of the body 11 to penetrate into the housing portion 112. Therefore, the second waterproof area WP2, which includes the housing portion 112, is formed in the central part of the front surface of the body 11 in the left-right direction.

[0172] Furthermore, in this embodiment, as shown in Figures 23A and 23B, a structure is also employed to suppress the intrusion of liquid from the joint between the body 11 and the cover 12. Specifically, the cover 12 is attached to the body 11 with the upper end portion 17 of the body 11 inserted into the recess 181 of the cover 12, thereby suppressing the intrusion of liquid into the housing 1 from the joint between the body 11 and the cover 12. In other words, the rib 18 that protrudes downward from the rear end portion of the upper wall of the cover 12 is fitted so as to overlap the upper end portion 17 of the body 11, so that in a rear view, the joint between the body 11 and the cover 12 is covered by the rib 18. Thus, the rib 18 (recess 181) has the function of preventing the cover 12 from falling off the body 11, as well as the function of suppressing the intrusion of liquid from the joint between the body 11 and the cover 12. In this embodiment, as shown in Figure 23A, the rib 18 is formed only in the area R10 of the lower surface of the upper wall of the cover 12, excluding both ends in the left-right direction. As a result, a second waterproof area WP2 is formed in the central part of the front of the body 11 in the left-right direction, making it difficult for liquid to penetrate.

[0173] With the configuration described above, the housing 1 has flow channels R1 formed on both sides of the circuit board 4 in the left-right direction (X-axis direction) when viewed from the front. Furthermore, the housing 1 has overhangs (first overhang 151 and second overhang 152) positioned at least above the circuit board 4, which direct liquid that has entered the housing 1 into the flow channels R1. That is, when viewed from the front, the liquid that has entered the housing 1 will flow through the flow channels R1 on both sides of the circuit board 4 in the left-right direction, avoiding at least the second waterproof area WP2. As shown in Figure 22A, the flow channels R1 through which the liquid that has entered the housing 1 flows are formed on both sides of the second waterproof area WP2, avoiding the first waterproof area WP1.

[0174] Furthermore, as shown in Figure 22B, the second waterproof area WP2 is also formed on the inside of the housing 112. Although liquid may adhere to the back surface of the housing 1, waterproofing of the inside of the housing 112 is achieved as follows.

[0175] In other words, as shown in Figure 24A, the housing portion 112 protrudes from the rear surface of the flat plate portion 111 of the body 11. The upper surface 153 of the housing portion 112 is sloped such that the center in the left-right direction (X-axis direction) is the highest point, and it becomes lower towards both ends in the left-right direction. Furthermore, a flange portion 154 is formed at the rear end of the housing portion 112, protruding upward from the upper surface 153. With this configuration, as shown in Figure 24A, the liquid S1 that flows from the rib 18 of the cover 12 to the rear surface of the flat plate portion 111 of the body 11 will flow to both sides of the housing portion 112 in the left-right direction.

[0176] Furthermore, as shown in Figure 24B, a structure is also employed to suppress the intrusion of liquid from the joint between the housing 112 and the back cover 113. Figure 24B is a partially cutaway enlarged view showing area A1 of Figure 24A. Specifically, the back cover 113 is attached to the housing 112 with the upper end portion 156 of the back cover 113 inserted into a recess 157 that is open below the housing 112, thereby suppressing the intrusion of liquid into the housing 1 from the joint between the housing 112 and the back cover 113. In other words, a rib 155 that protrudes downward from the lower rear edge of the rear surface of the housing 112 is combined to overlap the upper end portion 156 of the back cover 113, so that in a rear view, the joint between the housing 112 and the back cover 113 is covered by the rib 155. Thus, the rib 155 (recess 157) has the function of suppressing the ingress of liquid from the joint between the housing portion 112 and the back cover portion 113. With this configuration, as shown in Figure 24B, the liquid S1 adhering to the rear surface of the housing portion 112 does not ingress into the housing 1 from the joint between the housing portion 112 and the back cover portion 113, but flows to the rear surface of the back cover portion 113.

[0177] (3) Variant Embodiment 1 is just one of many embodiments of the present disclosure. The drawings referenced in Embodiment 1 are all schematic, and the ratios of the size and thickness of each component in the drawings do not necessarily reflect the actual dimensional ratios. Embodiment 1 can be modified in various ways depending on the design, etc., as long as it achieves the objectives of the present disclosure. The modifications described below can be combined and applied as appropriate.

[0178] (3.1) First variation As shown in Figure 25A, the alarm device 10 according to the first modified embodiment differs from the alarm device 10 according to embodiment 1 in the shape and arrangement of the reset button 23A in the activation unit 2A.

[0179] In other words, in this modified example, the circular area located on a part of the front surface 101 of the housing 1 is divided into two areas along one of the diameters of the circular area. These two areas become the front surfaces of the operating surface 211A and the reset button 23A, respectively. That is, in the example of Figure 25A, the circular area inside the annular plate 241 is divided into two vertically. Of the two divided areas, the lower area becomes the operating surface 211A of the push button 21A, and the upper area becomes the front surface of the reset button 23A. Here, the operating surface 211A occupies more than half the area of ​​the circular area inside the annular plate 241. In other words, the operating surface 211A has a larger area than the front surface of the reset button 23A.

[0180] According to this modified configuration, the push button 21A (operating surface 211A) and the reset button 23A can be housed within the same circular area as the annular light-emitting section 311, making it possible to adopt a unified design based on a circle. Moreover, since the reset button 23A is positioned adjacent to the push button 21A, it becomes easier to operate the reset button 23A when the push button 21A is in the operating position.

[0181] (3.2) Second Variation As shown in Figure 25B, the alarm device 10 according to the second modified embodiment of Embodiment 1 differs from the alarm device 10 according to Embodiment 1 in the arrangement of the light-emitting part 311 in the indicator light 3.

[0182] In other words, in this modified example, the light-emitting unit 311 is positioned adjacent to the operating surface 211 of the push button 21 on the front surface 101 of the housing 1. That is, the light-emitting unit 311 is positioned just outside the operating surface 211. The annular plate 241 is formed in a shape that surrounds the operating surface 211 and the light-emitting unit 311 when viewed from the front. In other words, in this modified example, on the front surface 101 of the housing 1, the light-emitting unit 311 is positioned around the operating surface 211, and the annular plate 241 is positioned around the light-emitting unit 311.

[0183] Thus, the light-emitting section 311 only needs to be an annular shape surrounding the operating surface 211 when viewed from the front, and the position of the annular plate 241 between the light-emitting section 311 and the operating surface 211 when viewed from the front is not an essential configuration for the alarm device 10. Furthermore, in the example of Figure 25B, the position of the annular plate 241 around the light-emitting section 311 is not essential, and the annular plate 241 may be omitted as appropriate.

[0184] (3.3) Other variations The following lists variations other than the first and second variations.

[0185] The alarm device 10 may be used indoors as well as outdoors. When the alarm device 10 is installed indoors, it is not mandatory for the alarm device 10 to be waterproof, and waterproofing can be omitted as appropriate. However, even when the alarm device 10 is installed indoors, it may still be waterproof.

[0186] Furthermore, the fact that the intermediate member 34 and the light guide member 33 are separate components is not an essential configuration for the alarm device 10; the intermediate member 34 may be integrated with the light guide member 33. For example, the intermediate member 34 and the light guide member 33 can be integrated by forming them from the same material. Alternatively, the intermediate member 34 and the light guide member 33, which are made of different materials, can be integrated by two-color molding.

[0187] Furthermore, it is not a mandatory configuration for the alarm device 10 that the front surface 101 of the housing 1, the light-emitting part 311, the annular plate 241, and the operating surface 211 are all flush. For example, the front surface 101 of the housing 1 and the light-emitting part 311 may be flush, while the annular plate 241 and the operating surface 211 may be in a position that protrudes or is recessed relative to the light-emitting part 311. Alternatively, for example, the light-emitting part 311, the annular plate 241, and the operating surface 211 may be flush, while the light-emitting part 311 may be in a position that protrudes or is recessed relative to the front surface 101 of the housing 1.

[0188] Furthermore, the positioning of the annular plate 241 between the light-emitting section 311 and the operating surface 211 in a front view is not an essential configuration for the alarm device 10, and the annular plate 241 may be omitted as appropriate. In this case, excluding the annular plate 241, for example, the front surface 101 of the housing 1, the light-emitting section 311, and the operating surface 211 may all be flush.

[0189] Furthermore, each terminal 481 in the terminal section 48 is not limited to screw terminals, but may also be a plug-in type terminal, for example, a so-called quick-connect terminal in which the wiring is connected simply by inserting the wire.

[0190] Furthermore, a gap G1 does not necessarily need to be maintained between the activation unit 2 and the internal container 100, and the rear surface of the activation unit 2 may be in contact with the internal container 100. In this case, the internal container 100 can receive the force applied to the activation unit 2 when the push button 21 of the activation unit 2 is pressed.

[0191] (Embodiment 2) As shown in Figures 26A and 26B, the alarm device 10A according to this embodiment differs from the alarm device 10 described in Embodiment 1 in the configuration of the indicator light 3A. Hereinafter, components similar to those in Embodiment 1 will be denoted by common reference numerals and their descriptions will be omitted as appropriate. Figure 26B is a diagram showing the relative positional relationship between the light source unit 32 and the light guide member 33. In Figure 26B, the lamp body cover 31 including the light-emitting unit 311 is shown by dashed lines.

[0192] In this embodiment, the intermediate member 34 (see Figure 10) is omitted in the indicator light 3A. The light source unit 32 directly emits light towards the incident portion 331 of the light guide member 33. In short, in this embodiment, the light guide member 33 has an incident portion 331 into which light from the light source unit 32 enters. The light source unit 32 is positioned opposite the incident portion 331 and outputs light toward the incident portion 331.

[0193] Specifically, in this embodiment, the multiple light-emitting elements 321 constituting the light source unit 32 are mounted on an LED substrate 36, as shown in Figure 26A. The LED substrate 36 is a separate substrate from the circuit board 4 and is electrically connected to the circuit board 4 by electric wires (cables). The LED substrate 36 is positioned above the light guide member 33 and facing the tip surface (upper surface) of the incident portion 331. The LED substrate 36 is positioned with the mounting surface of the multiple light-emitting elements 321 facing downwards (in the negative direction of the Z axis).

[0194] With this configuration, since there is no loss in the intermediate member 34, it is possible to efficiently direct the light from the light source 32 into the light guide member 33.

[0195] Furthermore, as a modification of Embodiment 2, even when multiple light-emitting elements 321 are mounted on the LED substrate 36, an intermediate member 34 may be interposed between the light source unit 32 and the incident unit 331.

[0196] The configuration described in Embodiment 2 (including modified versions) can be appropriately combined with the various configurations (including modified versions) described in Embodiment 1.

[0197] (Embodiment 3) As shown in Figures 27 to 32B, the alarm device 10B according to this embodiment differs from the alarm device 10 according to Embodiment 1 mainly in the configuration around the speaker 5. Hereinafter, components similar to those in Embodiment 1 will be denoted by common reference numerals and their descriptions will be omitted as appropriate.

[0198] Figure 27 is an exploded perspective view showing the mounting box 6, body 11, and cover 12 separated. As is clear from Figure 27, the alarm device 10B differs from the alarm device 10 according to Embodiment 1 in some aspects of its configuration other than around the speaker 5, such as the orientation of the battery 7. Also, in the example in Figure 27, fixing screws 66 for fixing the body 11 are installed in the screw holes 621 of the fixing boss 62. Furthermore, in the example in Figure 27, caps 67 are installed to close the wiring holes 65 formed in the upper and lower walls of the mounting box 6.

[0199] The main differences between the alarm device 10B according to this embodiment and the alarm device 10 according to Embodiment 1 will be described item by item below.

[0200] (1) Speaker mounting structure First, the structure for fixing the speaker 5 in the alarm device 10B according to this embodiment will be described.

[0201] In the alarm device 10B according to this embodiment, a thinner speaker 5 is used compared to the speaker 5 of Embodiment 1. Specifically, the speaker 5 of this embodiment is formed in a disc shape with thickness, and both sides in the thickness direction are substantially flat. In other words, the speaker 5 of this embodiment does not have a large protrusion such as the rear part including the voice coil and magnet, that is, the part inserted into the round hole 411 of the circuit board 4, as shown in the speaker 5 of Embodiment 1 (see Figure 11). Furthermore, the dimensions (area) of the speaker 5 of this embodiment are smaller in front view compared to the speaker 5 of Embodiment 1. Here, since the speaker 5 is substantially circular in front view, the diameter of the speaker 5 of this embodiment is smaller than the diameter of the speaker 5 of Embodiment 1. Such a thin speaker 5 is easier to miniaturize and lighten compared to the speaker 5 of Embodiment 1. Therefore, it is easier to keep the space occupied by the speaker 5 in the internal space of the housing 1 small, and furthermore, it is easier to lighten the entire internal unit 100.

[0202] In adopting such a thin speaker 5 for the alarm device 10B, the structure related to the fixing of the speaker 5, that is, the fixing structure of the speaker 5, differs from that of the alarm device 10 according to Embodiment 1.

[0203] In other words, in this embodiment, as shown in Figures 28 and 29, the speaker 5 is housed between the flat plate portion 111 of the body 11 and the main board body 41 of the circuit board 4. Specifically, similar to Embodiment 1, a speaker placement portion 116 is formed on the rear surface of the flat plate portion 111 of the body 11, in the area surrounded by the housing portion 112. The speaker placement portion 116 is a portion for arranging the speaker 5.

[0204] In short, the housing 1 comprises a body 11 and a cover 12. The cover 12 is attached to the body 11 so as to cover the front surface of the body 11. The body 11 has a speaker placement section 116 for positioning the speaker 5 in the part facing the front surface 401 of the circuit board 4 (see Figure 30A). In this embodiment, the speaker placement section 116 consists of a circular recess corresponding to the shape of the speaker 5. Therefore, the speaker 5 is positioned in the speaker placement section 116 so as to be fitted into the circular recess from the rear (circuit board 4 side). Here, the speaker 5 is positioned in the speaker placement section 116 with its front surface, which is the sound extraction surface, facing the bottom surface of the speaker placement section 116. Furthermore, since a hole is formed in the bottom surface of the speaker mounting section 116 that penetrates the body 11 (flat plate section 111) in the front-to-back direction, the sound output from the speaker 5 is output forward from the front of the body 11 through the hole in the bottom surface of the speaker mounting section 116.

[0205] Here, as shown in Figures 28 and 29, the speaker 5 is fitted into the speaker mounting section 116 together with a baffle ring 51, which serves as a baffle member. The baffle ring 51 is made of resin, for example. The baffle ring 51 is an annular shape with approximately the same diameter as the outer circumference of the front surface of the speaker 5. When the speaker 5 and the baffle ring 51 are positioned in the speaker mounting section 116, the baffle ring 51 is interposed between the front surface of the speaker 5 and the bottom surface of the speaker mounting section 116. In other words, the alarm device 10B according to this embodiment is equipped with a baffle member (baffle ring 51), and the baffle member (baffle ring 51) is sandwiched between the outer circumference of the front surface of the speaker 5 and the speaker mounting section 116. As a result, the gap between the outer circumference of the front surface of the speaker 5 and the speaker mounting section 116 is filled by the baffle member (baffle ring 51), and sound leakage from this gap is suppressed. As a result, the sound output from speaker 5 is relatively efficiently emitted forward from the front of body 11 through the holes in the bottom surface of speaker placement section 116.

[0206] Furthermore, in this embodiment, the speaker 5 is not directly fixed to the body 11 with screws, but is fixed to the body 11 by being pressed against the speaker placement portion 116 by the speaker pressing portion 54. As shown in Figures 28 and 29, the speaker pressing portion 54 includes a protrusion 541 that protrudes forward from a part of the back cover portion 113 of the body 11. Here, as an example, the protrusion 541 is integral with the back cover portion 113 and is formed in a hollow cylindrical shape. The back cover portion 113 also has a flexible portion 542 around the protrusion 541. Here, as an example, the flexible portion 542 is formed in an annular region around the protrusion 541 and consists of a thin-walled portion that is thinner than the other parts of the back cover portion 113, i.e., the area around the flexible portion 542. Therefore, the flexible portion 542 is more flexible than other parts of the case back portion 113 (parts other than the flexible portion 542).

[0207] The speaker pressing portion 54 has a protrusion 541 that penetrates from the rear side (back cover portion 113 side) to the front side 401 side of the circuit board 4 through a hole 412 formed in the circuit board 4. The hole 412 is formed in the circuit board body 41 of the circuit board 4 in place of the round hole 411 of Embodiment 1 (see Figure 11). In other words, the speaker 5 itself is not inserted into the hole 412, but rather the protrusion 541 of the speaker pressing portion 54 is inserted into it, and the opening area of ​​the hole 412 is kept smaller than the opening area of ​​the round hole 411. The speaker pressing portion 54 presses the speaker 5 against the speaker placement portion 116 over the baffle ring 51 by pressing the tip (front) of the protrusion 541 that protrudes from the front side 401 of the circuit board 4 through the hole 412 against the rear surface of the speaker 5. With the speaker 5 pressed against the speaker placement section 116 by the speaker pressing section 54, the back cover section 113 is fixed to the housing section 112 with multiple screws 114 (seven in this case), thereby fixing the speaker 5 to the body 11.

[0208] In other words, the alarm device 10B according to this embodiment includes a speaker pressing section 54 that presses the speaker 5 against the speaker placement section 116 from the circuit board 4 side. This makes it difficult for sound to leak from the gap between the speaker placement section 116 and the speaker 5, and makes it easier to efficiently extract the sound output from the speaker 5.

[0209] Here, the body 11, similar to Embodiment 1, has a flat plate portion 111, a housing portion 112 that protrudes rearward from the rear surface of the flat plate portion 111, and a back cover portion 113 that closes the rear surface of the housing portion 112. The circuit board 4 and the speaker 5 are housed in the space enclosed by these flat plate portion 111, housing portion 112, and back cover portion 113. In other words, the body 11 has a back cover portion 113 that is located opposite the speaker placement portion 116 when viewed from the speaker 5. The speaker pressing portion 54 includes a protrusion 541 that protrudes toward the speaker placement portion 116 from a part of the back cover portion 113. The speaker pressing portion 54 presses the speaker 5 against the speaker placement portion 116 with the tip of the protrusion 541. As a result, when assembling the back cover portion 113, the speaker pressing portion 54 can press the speaker 5 against the speaker placement portion 116. Furthermore, the circuit board 4 is located between the back cover 113 and the speaker 5. The protrusion 541 penetrates the hole 412 formed in the circuit board 4. This makes it easier to maintain a relatively small gap between the back cover 113 and the speaker mounting area 116 while ensuring sufficient height for the protrusion 541 and making it easier to press the speaker 5 against it.

[0210] Furthermore, the back cover portion 113 has a flexible portion 542 around the protrusion 541. The flexible portion 542 is more flexible than other parts of the back cover portion 113. Here, as shown in Figure 30A, the amount of protrusion of the protrusion 541 from the front surface of the back cover portion 113 is set to be greater than the distance from the front surface of the back cover portion 113 to the rear surface of the speaker 5. Therefore, dimensional variations due to tolerances, etc., in the body 11 or speaker 5 can be absorbed by the flexibility of the flexible portion 542. In particular, in this embodiment, the amount of protrusion of the protrusion 541 from the front surface of the back cover portion 113 is set to be greater than the distance from the front surface of the back cover portion 113 to the rear surface of the speaker 5. Therefore, when the back cover portion 113 is fixed to the housing portion 112, pre-pressure is always applied to the speaker 5 from the protrusion 541 of the speaker pressing portion 54, making it less likely for a gap to occur between the speaker placement portion 116 and the speaker 5.

[0211] Incidentally, the sound output from speaker 5 is output to the outside of housing 1 through a sound output hole 122 (see Figure 31) formed in the cover 12 which serves as the front wall of housing 1. In this embodiment, speaker 5 is positioned close to the sound output hole 122 within the internal space of housing 1, thereby enabling efficient output of sound from speaker 5 to the outside of housing 1. Here, as shown in Figure 30A, speaker 5 is located between the center C10 in the front-to-back direction of housing 1 and the front surface 101 of housing 1. In other words, when housing 1 is divided in half at the center C10 in the front-to-back direction, speaker 5 is located between the center C10 and the front surface 101 of housing 1. To put it another way, speaker 5 is located in the internal space of housing 1, in front of the center C10 in the front-to-back direction of housing 1, i.e., in the front half of housing 1. In Figure 30A, the center C10 is the center position when the housing 1 is divided into two equal parts in the front-to-back direction, and the distance L11 from the front surface 101 of the housing 1 to the center C10 is equal to the distance L12 from the rear surface of the housing 1 (the rear surface of the back cover portion 113) to the center C10. Here, the front-to-back center C10 of the housing 1 may be the front-to-back center C10 in the internal space of the housing 1 (the internal space of the body 11). In particular, in this embodiment, a thin speaker 5 is used, so it is possible to keep the dimensions of the housing 1 in the front-to-back direction relatively small while still housing the speaker 5 in the front half of the housing 1.

[0212] Furthermore, in this embodiment, the speaker 5 is positioned in front of the front surface 401 of the circuit board 4 in the front-to-back direction. In other words, the speaker 5 is positioned at a distance from the front surface 401 of the circuit board 4 in the front-to-back direction. In particular, in this embodiment, as described above, the protrusion 541 of the speaker pressing portion 54 protrudes forward from the front surface 401 of the circuit board 4 by penetrating the hole 412 formed in the circuit board 4. Since the tip of this protrusion 541 contacts the speaker 5, the speaker 5 does not directly contact the circuit board 4, and a sufficient gap is secured between the speaker 5 and the front surface 401 of the circuit board 4, making it difficult for stress to be applied from the speaker 5 to the circuit board 4. Therefore, there is an advantage that stress is less likely to be applied from the speaker 5 to the circuit board 4 to the main board body 41 or to the various electronic components mounted on the main board body 41.

[0213] Furthermore, in this embodiment, the speaker placement section 116 has a speaker stopper 55, as shown in Figure 30A. The speaker stopper 55 is provided on the bottom surface of the speaker placement section 116 where the hole is formed, and restricts the movement of the speaker 5 at least forward. That is, the speaker placement section 116 has a speaker stopper 55. The speaker stopper 55 restricts the movement of the speaker 5 forward by exposing a part of the front surface of the speaker 5 to the front and facing a part of the front surface of the speaker 5. In this embodiment, the speaker stopper 55 is formed integrally with the flat plate section 111 of the body 11. As shown in Figure 28, the speaker stopper 55 is formed in a hole that penetrates the flat plate section 111 in the front-rear direction, and here, as an example, it includes a grid-like grid section 551. Furthermore, as shown in Figure 30A, the speaker stopper 55 faces the outer periphery of the front of the speaker 5 via the baffle ring 51, thereby suppressing sound leakage from the outer periphery of the front of the speaker 5.

[0214] (2) Waterproof structure around the speaker Next, the waterproof structure around the speaker 5 in the alarm device 10B according to this embodiment will be described.

[0215] In the alarm device 10B according to this embodiment, as shown in Figures 30A to 31, a sound output hole 122 is formed in a specific region R100 corresponding to the speaker 5 of the cover 12 which serves as the front wall of the housing 1. As described above, the sound output hole 122 is a hole for outputting sound output from the speaker 5 to the outside of the housing 1. Specifically, as shown in Figure 30A, a sound output hole 122 is formed in the cover 12 at a position facing the speaker 5 across the flat plate portion 111 of the body 11, penetrating the cover 12 in the front-to-back direction.

[0216] When the alarm device 10B is installed and used outdoors, liquid (such as water) may adhere to the surface of the housing 1. Therefore, the alarm device 10B is equipped with a waterproof sheet 103 as a waterproof structure to prevent liquid that has entered through the sound output hole 122 from reaching the internal components 100, such as the speaker 5, housed inside the housing 1. As shown in Figure 31, the waterproof sheet 103 is formed to match the shape of a specific region R100 in the cover 12 where the sound output hole 122 is formed, and is attached to the specific region R100 on the rear surface of the cover 12. As a result, the waterproof sheet 103 is positioned between the specific region R100 in the cover 12 where the sound output hole 122 is formed and the speaker 5. In other words, the waterproof sheet 103 blocks the sound output hole 122. The waterproof sheet 103 is, for example, a resin sheet that shields against liquid entering the speaker 5 from the sound output hole 122. The thickness of the waterproof sheet 103 is, for example, approximately 10 μm to 30 μm.

[0217] In short, the alarm device 10B according to this embodiment includes a speaker 5 housed in a housing 1 that receives an alarm signal and outputs an alarm sound. A sound output hole 122 is formed in a specific region R100 of the front wall (cover 12) of the housing 1 that corresponds to the speaker 5. A waterproof sheet 103 is placed between the specific region R100 and the speaker 5 to block liquid from entering the speaker 5 through the sound output hole 122. Here, as shown in Figure 30B, there is a gap G10 between the specific region R100 and the waterproof sheet 103 that allows vibration of the waterproof sheet 103. Figure 30B is a schematic enlarged view of region Z1 in Figure 30A. That is, the waterproof sheet 103 is attached to the rear surface of the cover 12, which is the front wall of the housing 1, but it is not attached so as to be in close contact with the rear surface of the cover 12, but rather a gap G10 is formed between it and the rear surface of the cover 12 (specific region R100). The gap G10 between the specific region R100 and the waterproof sheet 103 is of a size that allows at least some vibration of the waterproof sheet 103. For example, the dimension of the gap G10 in the front-to-back direction is greater than the thickness of the waterproof sheet 103.

[0218] In other words, since the waterproof sheet 103 blocks the sound output hole 122, it is preferable to have an air gap G10 between the waterproof sheet 103 and the cover 12 in order to suppress the reduction in the efficiency of sound extraction from the sound output hole 122 due to the waterproof sheet 103. That is, in order to ensure that the sound pressure of the sound extracted to the outside of the housing 1 is as high as possible, it is preferable that the waterproof sheet 103 be in a state where it can vibrate. When the waterproof sheet 103 vibrates within the range of the air gap G10, sound is transmitted more easily through the waterproof sheet 103 compared to a state where the waterproof sheet 103 cannot vibrate at all, and the sound pressure is less likely to decrease through the waterproof sheet 103. Therefore, it is preferable that the air gap G10 has dimensions that do not hinder the vibration of the waterproof sheet 103 caused by the sound output from the speaker 5.

[0219] Furthermore, in this embodiment, as shown in Figure 31, a decorative member 102 is attached to a position on the front surface 101 of the cover 12 corresponding to a specific area R100. The decorative member 102 is, for example, a sheet-like member made of resin, which covers the sound output hole 122 and the rectangular hole 123. In other words, the decorative member 102 of this embodiment is used in place of the first sheet 124 (see Figure 8) that covers the sound output hole 122 and the second sheet 125 (see Figure 8) that covers the rectangular hole 123 in Embodiment 1. To put it another way, a single sheet-like decorative member 102 is used in place of the first sheet 124 and the second sheet 125. Similar to the first sheet 124 of Embodiment 1, the decorative member 102 has a plurality of minute perforations 105 formed therein. These plurality of perforations 105 communicate with the sound output hole 122. Therefore, the sound output from speaker 5 is emitted from the front surface 101 of housing 1 (more precisely, the front surface of decorative member 102) through the sound output hole 122 and multiple permeable holes 105 of housing 1 (cover 12).

[0220] As described above, the alarm device 10B according to this embodiment is equipped with a decorative member 102. The decorative member 102 is attached to a position on the front surface 101 of the housing 1 that corresponds to a specific area R100. The decorative member 102 has a plurality of perforations 105 that communicate with the sound output hole 122. Furthermore, the housing 1 has partition bars 127 that divide the sound output hole 122 into multiple areas when viewed from the front, at positions that do not overlap with the plurality of perforations 105.

[0221] More specifically, as shown in Figure 32A, the specific region R100 has a central part R101 and an outer peripheral part R102 surrounding the central part R101. Figure 32A is a rear view of the main part of the cover 12, and the waterproof sheet 103 is not shown in Figure 32A. The specific region R100 is, for example, polygonal (pentagonal in the example of Figure 32A). The sound output hole 122 is formed in the central part R101 of the specific region R100. The outer peripheral part R102 of the specific region R100 is provided with an adhesive part 104 for adhering the waterproof sheet 103 to the front wall (cover 12) of the housing 1. In other words, the waterproof sheet 103 is not adhered to the central part R101 of the specific region R100, but only to the outer peripheral part R102 surrounding the central part R101.

[0222] In this embodiment, as an example, the adhesive portion 104 is made of double-sided adhesive tape having a thickness greater than or equal to that of the waterproof sheet 103. In this way, the waterproof sheet 103 is attached to the front wall (cover 12) of the housing 1 by the adhesive portion 104. The adhesive portion 104 is provided on the outer periphery R102 of the specific region R100 so as to surround the central portion R101 of the specific region R100. As a result, the waterproof sheet 103 is adhered to the housing 1 (cover 12) only at its outer periphery, and a gap G10 greater than or equal to the thickness of the adhesive portion 104 is formed between the waterproof sheet 103 and the cover 12, at least in the central portion of the waterproof sheet 103.

[0223] Furthermore, the housing 1 (cover 12) has partition bars 127 that divide the sound output hole 122 into multiple areas. The partition bars 127 include portions that extend in the vertical direction (Z-axis direction) and the horizontal direction (X-axis direction), thereby forming a grid shape overall. In this embodiment, as an example, the partition bars 127 have two portions that extend in the vertical direction and two portions that extend in the horizontal direction. Therefore, the sound output hole 122 is divided into a total of nine areas by the partition bars 127, divided into three in the vertical direction and three in the horizontal direction. Here, the sound output hole 122 is not divided into areas of the same shape; rather, in the vertical direction, the central area is the widest of the three areas, and in the horizontal direction, the central area is the widest of the three areas.

[0224] Here, each of the multiple through-holes 105 formed in the decorative member 102 has a circular opening. These multiple through-holes 105 are arranged in a grid pattern, with multiple holes in the vertical direction and multiple holes in the horizontal direction. In this embodiment, as an example, the decorative member 102 has a total of 70 through-holes 105, with 7 holes in the vertical direction and 10 holes in the horizontal direction.

[0225] The partition bar 127 is positioned so as not to overlap with the multiple perforations 105 formed in the decorative member 102 in the front-to-back direction. In other words, the partition bar 127 is positioned to pass between two adjacent perforations 105 of the multiple perforations 105 formed in the decorative member 102. As a result, as shown in Figure 32A, the multiple perforations 105 are distributed and arranged in each area separated by the partition bar 127, and none of the multiple perforations 105 are blocked by the partition bar 127. In this way, since the multiple perforations 105 that communicate with the sound output hole 122 are not blocked by the partition bar 127, the sound output from the speaker 5 is not obstructed by the partition bar 127 and is more easily output from the front surface 101 of the housing 1.

[0226] Furthermore, in the alarm device 10B according to this embodiment, as shown in Figure 32B, the decorative member 102 has a dummy hole 106. The dummy hole 106 does not penetrate the decorative member 102 and mimics at least one of the multiple through-holes 105. In this embodiment, multiple dummy holes 106 are provided in the decorative member 102, but it is sufficient to have at least one dummy hole 106 in the decorative member 102. Although the dummy hole 106 is called a "hole," it merely mimics the through-hole 105 in appearance and is not structurally a "hole" that penetrates the decorative member 102. In short, the decorative member 102 has multiple through-holes 105 that penetrate the decorative member 102 and at least one dummy hole 106 that does not penetrate the decorative member 102.

[0227] More specifically, the dummy hole 106 consists of a black shape (in this case, a circle) drawn on the surface (front) of the decorative member 102. In other words, the dummy hole 106 is drawn on the surface of the decorative member 102, for example by printing or painting, so that it looks similar to the through hole 105. In particular, in this embodiment, since the member visible behind the through hole 105 in a front view is black, the dummy hole 106 drawn with a black shape is difficult to distinguish from the through hole 105. Such dummy holes 106 are provided in multiples, for example, in an annular arrangement surrounding the area of ​​the decorative member 102 where multiple through holes 105 are formed. Moreover, since the spacing between the multiple dummy holes 106 is the same as the spacing between the multiple through holes 105, it is even more difficult to distinguish between the dummy holes 106 and the through holes 105. In the example shown in Figure 32B, the multiple dummy holes 106 are arranged in one row each above, below, to the left, and to the right of the region where the multiple through-holes 105 are formed. However, this is not limited to this example; for example, multiple rows may be arranged above and below. Here, no sound output holes 122 are formed in the cover 12 at positions that overlap with the multiple dummy holes 106. In other words, the dummy holes 106 are positioned so that they protrude from the speaker 5 when viewed from the front.

[0228] The presence of these dummy holes 106 makes it appear to anyone viewing the alarm device 10B that the perforations 105 extend over a wider area than the size of the speaker 5, making it seem as though a larger speaker 5 is housed within the housing 1 than it actually is.

[0229] (3) Speaker output sound Next, the output sound of the speaker 5 in the alarm device 10B according to this embodiment will be described.

[0230] As described above, the alarm device 10B according to this embodiment uses a thinner speaker 5 compared to the first embodiment. Such a thin speaker 5 has different sound output characteristics than the speaker 5 of the first embodiment. On the other hand, considering the performance required for the alarm device 10B, in this embodiment, the output sound of the speaker 5 is configured as described below so that it can output an alarm sound at the same sound pressure as the alarm device 10A of the first embodiment.

[0231] In other words, as described above, the alarm device 10B according to this embodiment includes a speaker 5 housed in the housing 1 that receives an alarm signal and outputs an alarm sound. Here, the speaker 5 simultaneously outputs a first output sound and a second output sound. The second output sound is a sound with a higher frequency than the first output sound. Specifically, the first output sound is a sound with the same frequency as the output sound that the speaker 5 outputs as an alarm sound in the alarm device 10 according to Embodiment 1. On the other hand, the second output sound is a sound with a frequency that is n times (n is an integer of 2 or more) that of the first output sound. That is, the second output sound is the nth harmonic with the first output sound as the fundamental wave.

[0232] In this embodiment, as shown in Figure 33, the speaker 5 outputs the first output sound and the second output sound simultaneously by playing back a sound source 501 that includes a first output sound and a second output sound. Figure 33 is a conceptual diagram showing how sound (first output sound and second output sound) is output from the speaker 5 when the sound source 501 is played back. In this embodiment, as shown in Figure 33, the alarm device 10B includes a sound source 501 and an amplifier 502 in addition to the speaker 5. The sound source 501 is a non-temporary recording medium that records data for playing back the first output sound and the second output sound, and is mounted on the circuit board 4. The amplifier 502 amplifies the audio signal Si3 output from the sound source 501 when the sound source 501 is played back. When the amplified audio signal Si3 from the amplifier 502 is input to the speaker 5, the speaker 5 is driven and the output sound is output from the speaker 5.

[0233] In other words, in this embodiment, since the sound source 501 includes a first output sound and a second output sound, as shown in Figure 33, the audio signal Si3 output from the sound source 501 consists of a combined signal of a first signal Si1 corresponding to the first output sound and a second signal Si2 corresponding to the second output sound. In other words, if only the first signal Si1 is played back from the sound source 501, only the first output sound is output from the speaker 5. Similarly, if only the second signal Si2 is played back from the sound source 501, only the second output sound is output from the speaker 5. In this embodiment, since the sound source 501 has an audio signal Si3 that is a combination of the first signal Si1 and the second signal Si2 recorded on it, when this sound source 501 is played back, the first output sound and the second output sound are output simultaneously from the speaker 5.

[0234] Incidentally, as mentioned above, the alarm device 10B according to this embodiment uses a thinner speaker 5 compared to Embodiment 1, and therefore has sound output characteristics that result in higher sound pressure in the higher frequency range compared to the speaker 5 of Embodiment 1. In Figure 34A, with sound pressure on the vertical axis and frequency on the horizontal axis, graph Gr1 shows the speaker characteristics of the speaker 5 of Embodiment 1, and graph Gr2 shows the speaker characteristics of the thin speaker 5 of this embodiment. That is, as shown in Figure 34A, the thin speaker 5 of this embodiment has higher sound pressure in the higher frequency range and lower sound pressure in the lower frequency range compared to the characteristics of the speaker 5 of Embodiment 1. More specifically, if the frequency range lower than a specific frequency f1 is defined as the first frequency band B1, and the frequency range above the specific frequency f1 is defined as the second frequency band B2, the thin speaker 5 of this embodiment can achieve relatively high sound pressure in the second frequency band B2. In other words, the thin speaker 5 of this embodiment has a higher sound pressure in the second frequency band B2 and a lower sound pressure in the first frequency band B1 compared to the characteristics of the speaker 5 of Embodiment 1.

[0235] As described above, since a thin speaker 5 that excels in relatively high frequency bands (second frequency band B2) is used, in this embodiment, it is preferable that the speaker 5 simultaneously outputs a first output sound and a second output sound with a higher frequency than the first output sound. This allows the speaker 5 to output a sound at the frequency of the first output sound while simultaneously increasing the sound pressure with the second output sound superimposed on the first output sound. As a result, the alarm device 10B according to this embodiment is able to maintain the sound pressure of the alarm sound even while using a thin speaker 5. In other words, by increasing the sound pressure of the second output sound, which is a harmonic, the overall sound pressure of the output sound from the speaker 5, which is a composite sound of the first and second output sounds, is increased, and the sound pressure is kept comparable to that of the speaker 5 in Embodiment 1.

[0236] Furthermore, in this embodiment, the frequency band of the first output sound is variable. In particular, in this embodiment, the second output sound is a harmonic with the first output sound as the fundamental wave, so if the frequency band of the first output sound changes, the frequency band of the second output sound also changes accordingly. Specifically, the frequencies of the first and second output sounds are continuously changed by continuously changing the frequencies of the first signal Si1 and the second signal Si2, which are output by playing the sound source 501. If the frequency band of the sound output from the speaker 5 changes, people will be more likely to notice the alarm sound compared to when a sound of a constant frequency is output.

[0237] Furthermore, in this embodiment, as described above, the speaker characteristics unique to speaker 5 define a first frequency band B1 and a second frequency band B2. The second frequency band B2 is a frequency band in which the ratio of sound pressure to the amplitude of the electrical signal input to speaker 5 is higher than that of the first frequency band B1. Here, as shown in Figure 34B, speaker 5 repeatedly outputs an alarm sound, and in one alarm sound, the frequency band of the first output sound changes among multiple frequency bands, including the first frequency band B1 and the second frequency band B2. And, in one alarm sound, the period of the second frequency band B2 is longer than the period of the first frequency band B1.

[0238] Figure 34B shows the frequency of the alarm sound output from speaker 5, with frequency on the vertical axis and time on the horizontal axis. In the example shown in Figure 34B, within the period T1 of one alarm sound, the period T12 of the second frequency band B2 is more than twice as long as the period T11 of the first frequency band B1. In other words, within one alarm sound, the period T12 of outputting sounds at or above the specific frequency f1 is more than twice as long as the period T11 of outputting sounds below the specific frequency f1. Thus, within one alarm sound, the period T12 of the frequency band that speaker 5 is relatively good at (in this case, the second frequency band B2) is longer than the period T11 of the frequency band that speaker 5 is relatively bad at (in this case, the first frequency band B1), resulting in higher output efficiency of the alarm sound.

[0239] (4) Other differences Next, we will describe the main differences between the alarm device 10B according to this embodiment and the alarm device 10 according to Embodiment 1, excluding the area around the speaker 5.

[0240] In the alarm device 10B according to this embodiment, as shown in Figures 35A and 35B, the light source unit 32 is electrically connected to the circuit board 4 in a detachable manner. The light source unit 32 is also detachably attached to the housing 1. Thus, the light source unit 32 is configured to be replaceable. Specifically, in this embodiment, similar to Embodiment 2, the plurality of light-emitting elements 321 constituting the light source unit 32 are mounted on an LED substrate 36. However, in this embodiment, the light source unit 32 is composed of two light-emitting elements 321. The LED substrate 36 is a separate substrate from the circuit board 4 and is electrically connected to the circuit board 4 in a detachable manner by a connector. The LED substrate 36 is positioned above the light guide member 33 and facing the tip surface (upper surface) of the incident section 331. The LED substrate 36 is positioned with the mounting surface of the plurality of light-emitting elements 321 facing downwards (negative direction of the Z axis).

[0241] Furthermore, the alarm device 10B according to this embodiment includes a light source cover 37 that covers the LED substrate 36. The light source cover 37 is removably attached to the flat plate portion 111 of the body 11. The light source cover 37 has holes 371 formed in it at positions corresponding to the light-emitting elements 321 that constitute the light source unit 32, allowing light from the light source unit 32 to pass through. In other words, even when the light source cover 37 is attached to the body 11, light from the light source unit 32 reaches the incident portion 331 of the light guide member 33 through the light source cover 37.

[0242] The light source cover 37 has insertion pieces 372 that protrude from both end faces in the left-right direction (X-axis direction). A pair of insertion grooves 373 are formed in the flat plate portion 111 of the body 11 at positions corresponding to the pair of insertion pieces 372. Therefore, the light source cover 37 can be attached to the flat plate portion 111 from the front by inserting the pair of insertion pieces 372 into the pair of insertion grooves 373. When the light source cover 37 is removed from the body 11, the LED substrate 36 is exposed and becomes removable. The LED substrate 36 can also be attached to the flat plate portion 111 from the front, similar to the light source cover 37.

[0243] As described above, in this embodiment, similar to Embodiment 1, the intermediate member 34 (see Figure 10) is omitted, and the light source unit 32 directly emits light towards the incident portion 331 of the light guide member 33. In short, in this embodiment, the light source unit 32 is positioned opposite the incident portion 331 and outputs light toward the incident portion 331. Therefore, since there is no loss in the intermediate member 34, the light from the light source unit 32 can be efficiently incident on the light guide member 33. Furthermore, since the light source unit 32 is provided on an LED board 36 that is independent of the circuit board 4, housing 1, and light guide member 33, it is possible to replace only the light source unit 32 while keeping the circuit board 4, housing 1, and light guide member 33 as they are. As a result, the maintainability of the alarm device 10B is improved.

[0244] (5) Variant Embodiment 3 is just one of many embodiments of the present disclosure. The drawings referenced in Embodiment 3 are all schematic, and the ratios of the size and thickness of each component in the drawings do not necessarily reflect the actual dimensional ratios. Embodiment 3 can be modified in various ways depending on the design, etc., as long as the objectives of the present disclosure are achieved. The modifications described below can be combined and applied as appropriate.

[0245] (5.1) First variation In the first modified example of Embodiment 3, as shown in Figures 36A and 36B, the positional relationship between the adhesive portion 104 for bonding the waterproof sheet 103 and the sound output hole 122 differs from that of the alarm device 10B according to Embodiment 3. Figure 36B is a cross-sectional view taken along the line X1-X1 in Figure 36A.

[0246] In other words, in this modified example, the upper edge of the portion of the adhesive part 104 located below the sound output hole 122 (in the negative Z-axis direction) and the lower edge of the sound output hole 122 are in the same vertical position (Z-axis direction). Furthermore, the lower edge of the lowest perforated hole 105 among the multiple perforated holes 105 and the upper edge of the portion of the adhesive part 104 located below the sound output hole 122 are also in the same vertical position (Z-axis direction). Therefore, as shown in Figure 36B, the upper edge of the portion of the adhesive part 104 located below the sound output hole 122, the lower edge of the sound output hole 122, and the lower edge of the lowest perforated hole 105 among the multiple perforated holes 105 are flush.

[0247] Therefore, even if liquid (such as water) were to enter the sound output hole 122 through one of the multiple perforations 105, the liquid could be discharged to the outside of the housing 1 through the perforation 105 located at the bottom of the multiple perforations 105. In other words, with this modified configuration, liquid that enters the sound output hole 122 is less likely to accumulate in the gap between the rear surface of the cover 12 and the waterproof sheet 103.

[0248] Furthermore, the term "coincidence of positions" as used in this disclosure includes not only cases where the objects are in exactly the same position, but also cases where they are in approximately the same position, that is, substantially the same. For example, if A and B are said to have the same vertical position (height), they do not necessarily have to be in exactly the same position (height) in the vertical direction. In other words, if A and B are said to have the same vertical position, A only needs to be at approximately the same height as B, and in the vertical direction, A may protrude slightly more than B, or A may be slightly recessed compared to B.

[0249] (5.2) Other variations The following lists modifications other than the first modification in Embodiment 3.

[0250] The alarm device 10B according to Embodiment 3 was described as a "combined device" that not only has the function of an activation unit 2 that accepts human operation, but also the function of displaying information with an indicator light 3 and the function of outputting an alarm sound from a speaker 5, but it is not limited to this example. In other words, each component of the alarm device 10B can be applied to disaster prevention equipment other than "combined devices," such as a control panel (equipment housing box) that combines a fire alarm and an audible device.

[0251] If the alarm device 10B is a disaster prevention device such as a control panel, the activation unit 2 (fire alarm transmitter) has an electronic circuit, and the activation unit 2 (fire alarm transmitter) itself outputs an electrical signal (alarm signal) in response to the operation of the push button 21. Furthermore, the alarm device 10B, which consists of a disaster prevention device such as a control panel, does not operate on its own but works in cooperation with the receiver of the automatic fire alarm system. In other words, the alarm device 10B, which consists of a disaster prevention device such as a control panel, is used as a component of an automatic fire alarm system that includes, for example, detectors such as heat detectors, smoke detectors or flame detectors, and a receiver that receives alarm signals (fire signals) from the detectors. Furthermore, the alarm device 10B, which consists of a disaster prevention device such as a control panel, does not operate on the power of the storage battery 7, but operates on power supplied from the receiver of the automatic fire alarm system. Furthermore, the alarm device 10B, which consists of a disaster prevention device such as a control panel, may be equipped with a bell instead of a speaker 5 as an audible device, and may output an alarm sound by ringing the bell instead of an electronic sound. Furthermore, the alarm system 10B, which consists of disaster prevention equipment such as a control panel, may omit the test operation unit 8 that accepts test operations.

[0252] Furthermore, in the alarm device 10B according to Embodiment 3, as explained in "(4) Other Differences," the fact that the light source unit 32 is mounted on an LED board 36 separate from the circuit board 4 is not an essential configuration. In other words, in the alarm device 10B according to Embodiment 3, as in Embodiment 1, the light source unit 32 may be mounted on the circuit board 4, and the light from the light source unit 32 may be guided to the light guide member 33 by the intermediate member 34.

[0253] Furthermore, the baffle member is not limited to an annular member such as the baffle ring 51, but may also be polygonal in shape, for example. The baffle member is not limited to being made of resin, but may also be made of wood, ceramic, or metal, for example.

[0254] Furthermore, the flexible portion 542 only needs to be more flexible than other parts of the case back 113, and is not limited to thin-walled portions. For example, the flexible portion 542 may be beam-shaped, or it may be made of a material with a lower modulus of elasticity compared to other parts of the case back 113.

[0255] Furthermore, in Embodiment 2, the tip of the protrusion 541 is in direct contact with the rear surface of the speaker 5, but a baffle plate 52 (see Figure 11) may be interposed between the rear surface of the speaker 5 and the tip of the protrusion 541.

[0256] Furthermore, the adhesive portion 104 is not limited to double-sided adhesive tape having a thickness equal to or greater than that of the waterproof sheet 103, but may also be double-sided adhesive tape having a thickness less than that of the waterproof sheet 103, or it may be something other than double-sided adhesive tape. The adhesive portion 104 may be any means for attaching the waterproof sheet 103 to the front wall (cover 12) of the housing 1, and may be, for example, an adhesive, or a welded portion such as laser welding.

[0257] Furthermore, the second output sound can be any sound with a higher frequency than the first output sound, and is not limited to the nth harmonic with the first output sound as the fundamental wave.

[0258] The configuration described in Embodiment 3 (including modified versions) can be appropriately combined with various configurations (including modified versions) described in Embodiment 1 or Embodiment 2.

[0259] (summary) As described above, the alarm device (10, 10A, 10B) according to the first aspect includes a housing (1), an activation unit (2, 2A), an indicator light (3, 3A), a circuit board (4), and a speaker (5). The activation unit (2, 2A) has a push button (21, 21A) including an operation surface (211, 211A) disposed on the front surface (101) of the housing (1), and a mover (22) interlocked with the push button (21, 21A). When the push button (21, 21A) is operated such that the operation surface (211, 211A) is pushed, the mover (22) moves from the first position to the second position in the activation unit (2, 2A). The indicator light (3, 3A) has a light-emitting portion (311) disposed on the front surface (101) of the housing (1). The circuit board (4) is housed in the housing (1). The circuit board (4) outputs an alarm signal triggered by the movement of the mover (22) from the first position to the second position. The speaker (5) is housed in the housing (1). The speaker (5) outputs an alarm sound upon receiving the alarm signal. The speaker (5) is positioned above both the operation surface (211, 211A) and the light-emitting portion (311).

[0260] According to this aspect, the activation unit (2, 2A), the indicator light (3, 3A), and the speaker (5) are disposed in the housing (1). Among these, the speaker (5) is disposed at the highest position. Therefore, compared to a configuration in which the activation unit (2, 2A) is disposed at the lower end of the housing (1), the indicator light (3, 3A) is disposed at the upper end of the housing (1), and the speaker (5) is disposed between the two, it is easier to dispose the speaker (5) at a higher position. That is, if the installation position of the housing (1) is the same, by disposing the speaker (5) above both the operation surface (211, 211A) and the light-emitting portion (311), the speaker (5) will be disposed at a higher position. As a result, there is an advantage that it is easier to set the position of the speaker (5) higher than before and easier to dispose the speaker (5) at a position closer to the appropriate height.

[0261] The alarm devices (10, 10A, 10B) according to the second aspect further include a storage battery (7) housed in the housing (1) in the first aspect. The storage battery (7) and the circuit board (4) are arranged side by side in one direction along the front surface (101) of the housing (1).

[0262] According to this aspect, compared with a configuration in which the storage battery (7) and the circuit board (4) are arranged side by side in a direction orthogonal to the front surface (101) of the housing (1), it is easier to make the housing (1) thinner.

[0263] In the alarm devices (10, 10A, 10B) according to the third aspect, in the second aspect, the storage battery (7) is located above the speaker (5).

[0264] According to this aspect, compared with a configuration in which the storage battery (7) and the speaker (5) are arranged side by side in a direction orthogonal to the front surface (101) of the housing (1), it is easier to make the housing (1) thinner.

[0265] In the alarm devices (10, 10A, 10B) according to the fourth aspect, in any one of the first to third aspects, the circuit board (4) has a terminal portion (48) for connecting wiring at the lower end portion of the circuit board (4).

[0266] According to this aspect, the wiring drawn from below the terminal portion (48) can be connected to the terminal portion (48), and it is easy to suppress the liquid from reaching the terminal portion (48) along the wiring.

[0267] In the alarm devices (10, 10A, 10B) according to the fifth aspect, in any one of the first to fourth aspects, the housing (1) has a body (11) and a cover (12). The cover (12) is attached to the body (11) so as to cover the front surface of the body (11). The cover (12) has a recess (181) opened downward. The cover (12) is attached to the body (11) with the upper end portion (17) of the body (11) inserted into the recess (181).

[0268] According to this embodiment, it is easier to suppress the ingress of liquid into the housing (1) from the joint between the body (11) and the cover (12) at least at the upper end (17) of the body (11).

[0269] In the alarm device (10, 10A, 10B) according to the sixth embodiment, in any of the first to fifth embodiments, the housing (1) has a flow path (R1) and eaves (151, 152). The flow path (R1) is formed on both sides in the left-right direction of the circuit board (4) when viewed from the front. The eaves (151, 152) are positioned at least above the circuit board (4) and direct liquid that has entered the housing (1) into the flow path (R1).

[0270] According to this embodiment, by forming channels (R1) on both sides of the circuit board (4), it becomes less likely for liquid to adhere to the circuit board (4).

[0271] In the alarm device (10, 10A, 10B) according to the seventh embodiment, in any of the first to sixth embodiments, the housing (1) has a body (11) and a cover (12). The cover (12) is attached to the body (11) so as to cover the front surface of the body (11). Both ends of the cover (12) in the longitudinal direction in a front view are fixed to the body (11) by a coupling structure. At least a portion between both ends of the cover (12) in the longitudinal direction in a front view is held by the body (11) by fitting with the body (11).

[0272] According to this embodiment, even if distortion occurs in the body (11) or cover (12), it is possible to suppress the cover (12) from lifting away from the body (11) near the center of the cover (12) in the longitudinal direction. As a result, it is possible to suppress the formation of an unnecessary gap between the cover (12) and the body (11).

[0273] The alarm device (10, 10A, 10B) according to the eighth embodiment further comprises a mounting box (6) to which the housing (1) is attached, according to any of the first to seventh embodiments. The mounting box (6) has a temporary holding portion (63). The temporary holding portion (63) temporarily holds the housing (1) by hooking onto the housing (1).

[0274] According to this embodiment, when the worker attaches the housing (1) to the mounting box (6), the work efficiency is improved by temporarily holding the housing (1) in place in the mounting box (6).

[0275] The alarm device (10, 10A, 10B) according to the ninth embodiment further comprises a test operation unit (8) for receiving test operations in any of the first to eight embodiments. The test operation unit (8) is located on the front surface (101) of the housing (1) between the speaker (5) and the indicator lights (3, 3A).

[0276] In this embodiment, the speaker (5) is positioned even higher than the test control unit (8), making it easier to position the speaker (5) at a height closer to the appropriate height.

[0277] In the alarm device (10, 10A, 10B) according to the tenth embodiment, in any of the first to ninth embodiments, the operating surface (211, 211A) is located below the vertical center (C1) on the front surface (101) of the housing (1).

[0278] According to this embodiment, the operating surfaces (211, 211A) are positioned at a relatively low position, thereby improving the operability of the operating surfaces (211, 211A).

[0279] In the alarm device (10, 10A, 10B) according to the 11th embodiment, in any of the 1st to 10th embodiments, the speaker (5) is located between the center (C10) in the front-to-back direction of the housing (1) and the front surface (101) of the housing (1).

[0280] According to this aspect, since the speaker (5) is disposed at a position close to the front surface (101) of the housing (1), it becomes easier to efficiently extract the output sound from the speaker (5) from the housing (1).

[0281] In the warning device (10, 10A, 10B) according to the twelfth aspect, in the eleventh aspect, the speaker (5) is positioned forward of the front surface (401) of the circuit board (4) in the front-rear direction.

[0282] According to this aspect, it becomes difficult for the circuit board (4) to receive stress from the speaker (5).

[0283] In the warning device (10, 10A, 10B) according to the thirteenth aspect, in the eleventh or twelfth aspect, the housing (1) has a body (11) and a cover (12). The cover (12) is attached to the body (11) so as to cover the front surface of the body (11). The body (11) has a speaker placement portion (116) for placing the speaker (5) at a portion facing the front surface (401) of the circuit board (4).

[0284] According to this aspect, it becomes easier to place the speaker (5) at a portion of the body (11) facing the front surface (401) of the circuit board (4).

[0285] The warning device (10, 10A, 10B) according to the fourteenth aspect further includes a speaker pressing portion (54) in the thirteenth aspect. The speaker pressing portion (54) presses the speaker (5) against the speaker placement portion (116) from the side of the circuit board (4).

[0286] According to this aspect, it becomes easier to fix the speaker (5) to the speaker placement portion (116) without using screws or the like.

[0287] In the alarm device (10, 10A, 10B) according to the 15th embodiment, in the 14th embodiment, the body (11) has a back cover portion (113) located opposite the speaker mounting portion (116) when viewed from the speaker (5). The speaker pressing portion (54) includes a protrusion (541) that extends from a part of the back cover portion (113) toward the speaker mounting portion (116). The speaker pressing portion (54) presses the speaker (5) against the speaker mounting portion (116) with the tip of the protrusion (541).

[0288] According to this embodiment, the force pressing the speaker (5) against the speaker placement section (116) can be adjusted depending on the amount of protrusion of the convex portion (541).

[0289] In the alarm device (10, 10A, 10B) according to the 16th embodiment, the circuit board (4) is located between the back cover (113) and the speaker (5) as in the 15th embodiment. The protrusion (541) penetrates the hole (412) formed in the circuit board (4).

[0290] According to this embodiment, the distance from the circuit board (4) to the speaker (5) can be made relatively short.

[0291] In the alarm device (10, 10A, 10B) according to the 17th embodiment, in the 15th or 16th embodiment, the back cover (113) has a flexible portion (542) around the protrusion (541) that is more flexible than other parts of the back cover (113).

[0292] According to this embodiment, dimensional variations in the body (11) or speaker (5) due to tolerances, etc., can be absorbed by the bending of the flexible portion (542).

[0293] In the alarm device (10, 10A, 10B) according to the 18th embodiment, in any of the 13th to 17 embodiments, a baffle member (baffle ring 51) is further provided, which is sandwiched between the outer periphery of the front of the speaker (5) and the speaker placement section (116).

[0294] According to this embodiment, sound leakage from the gap between the speaker arrangement (116) and the speaker (5) is less likely to occur, and the sound output from the speaker (5) can be extracted more efficiently.

[0295] In the alarm device (10, 10A, 10B) according to the 19th embodiment, in any of the 13th to 18 embodiments, the speaker placement section (116) has a speaker stopper (55). The speaker stopper (55) restricts the forward movement of the speaker (5) by facing a part of the front surface of the speaker (5) while exposing a part of the front surface of the speaker (5) to the front.

[0296] According to this embodiment, it becomes easier to define the position of the speaker (5) in the front-to-back direction.

[0297] The configurations relating to aspects 2 to 19 are not essential to the alarm device (10, 10A, 10B) and can be omitted as appropriate. [Explanation of Symbols]

[0298] 1 Housing 2.2A Startup Unit 3,3A indicator light 4 Circuit boards 5 speakers 6. Mounting box 7. Storage Battery 8. Test control unit 10,10A,10B alarm device 11 Body 12 Covers 17 Upper end of the body 21,21A Push Button 22 Mover 48 Terminal section 51 Baffle ring (baffle component) 54 Speaker pressing part 55 Speaker stopper 63 Temporary holding part 101 Front of the housing 113 Case back 116 Speaker placement section 151,152 Eave 181 recess 211,211A Operation surface 311 Light-emitting part 401 Front of the circuit board 412 holes 541 Convex part 542 Flexible section C1 center C10 center R1 channel

Claims

1. Housing and A starting unit having a push button including an operating surface positioned on the front of the housing, and a movable element that is linked to the push button, wherein when the push button is operated so that the operating surface is pressed, the movable element moves from a first position to a second position, An indicator light having a light-emitting part positioned on the front of the housing, A speaker housed in the aforementioned housing and positioned above both the operating surface and the light-emitting section, The housing comprises a circuit board that is housed in the housing and triggers the movement of the movable element from a first position to a second position to output an alarm sound to the speaker, The aforementioned housing is The body and The body has a cover that is attached to the body so as to cover the front surface of the body, The body has a speaker placement section in the part facing the front of the circuit board for arranging the speaker. Alarm device.

2. The housing has a battery housing section for housing a storage battery. The alarm device according to claim 1.

3. It is further equipped with a test operation unit that accepts test operations, The test operation unit is positioned on the front surface of the housing, between the speaker and the indicator light. The alarm device according to claim 1 or 2.

4. The operating surface is located below the vertical center on the front surface of the housing. The alarm device according to any one of claims 1 to 3.

5. The speaker is located between the center of the housing in the front-to-back direction and the front surface of the housing. An alarm device according to any one of claims 1 to 4.

6. The speaker is located in front of the front surface of the circuit board in the front-to-back direction. The alarm device according to claim 5.

7. The battery housing for the storage battery is located on the front side of the body, in the portion covered by the cover. The alarm device according to any one of claims 1 to 6.

8. The aforementioned indicator light is A light source unit housed within the aforementioned housing and provided on the aforementioned circuit board, The light-emitting part has light emitted by the light from the light source, The alarm device according to any one of claims 1 to 7.

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