Repeaters and fire alarms

Abstract

To reduce the number of places to install devices in a system comprising a plurality of fire alarms each wirelessly communicating with the other fire alarm belonging to the same group and a relay which wirelessly relays a communication between fire alarms belonging to different groups.SOLUTION: A relay 20 is a device for relaying a wireless communication between a master unit in a plurality of fire alarms 100 included in a first group and a master unit in a plurality of fire alarms 100 included in a second group. The relay 20 comprises a claw 202 engaged with a hole provided in a base 30 which is mounted on a ceiling surface C and a hole which is engaged with a claw 102 of the fire alarm 100. The relay 20 is mounted between one of the plurality of fire alarms 100 and the ceiling surface C.SELECTED DRAWING: Figure 2

Description

Technical Field

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[0001] The present invention relates to a fire alarm.

Background Art

[0002] There is known a repeater that communicates wirelessly with a fire alarm and also communicates with an external device different from the fire alarm and relays communication between the fire alarm and the external device. For example, Patent Document 1 describes a CATV adapter that relays communication between dwelling alarms installed in different houses in order to cooperate a plurality of dwelling alarms.

[0003] By using a repeater that wirelessly relays communication between fire alarms installed in each of a plurality of different monitoring areas as in the invention described in Patent Document 1, those different monitoring areas can be integrated into one monitoring area, and the fire alarms installed in each monitoring area can be made to cooperate with each other.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] It is desirable that the number of devices installed on the installation surface such as the ceiling surface or wall surface of the monitoring area is small, as it reduces the burden of securing the installation location and the installation work. Also, in many cases, it is desirable that the number of devices installed on the installation surface of the monitoring area is small so as not to impair the aesthetics. <00000​​​ [Means for solving the problem]

[0007] To solve the above problems, the present invention proposes a repeater that wirelessly relays communication between at least one of a plurality of fire alarms included in a first group and at least one of a plurality of fire alarms included in a second group, and which includes a repeater-side coupling mechanism that can switch between a connected state, in which the repeater is connected to a fire alarm-side coupling mechanism of any fire alarm included in the first group, and a separated state, in which the repeater is separated from the fire alarm-side coupling mechanism.

[0008] Furthermore, in order to solve the above problems, the present invention proposes a fire alarm equipped with a fire alarm-side coupling mechanism that can switch between a connected state, in which the device is connected to a repeater-side coupling mechanism of a repeater that wirelessly relays communication between at least one of a plurality of fire alarms included in a first group including itself and at least one of a plurality of fire alarms included in a second group, and a separated state, in which the device is separated from the repeater-side coupling mechanism.

[0009] Furthermore, in order to solve the above problems, the present invention proposes a connecting member comprising: a first connecting mechanism that can switch between a connected state in which it is connected to a repeater-side connecting mechanism of a repeater that wirelessly relays communication between at least one of a plurality of fire alarms included in a first group and at least one of a plurality of fire alarms included in a second group, and a separated state in which it is separated from the repeater-side connecting mechanism; and a second connecting mechanism that can switch between a connected state in which it is connected to a fire alarm-side connecting mechanism of any fire alarm included in the first group, and a separated state in which it is separated from the fire alarm-side connecting mechanism. [Effects of the Invention]

[0010] According to the present invention, in a system comprising multiple fire alarms that communicate wirelessly with other fire alarms belonging to the same group, and a repeater that wirelessly relays communication between fire alarms belonging to different groups, the number of installation locations for the devices can be reduced. [Brief explanation of the drawing]

[0011] [Figure 1] A schematic diagram showing the configuration of a fire alarm system according to one embodiment. [Figure 2] A schematic diagram showing the appearance of an assembly (separated state) according to one embodiment when viewed horizontally. [Figure 3] A schematic diagram showing the appearance of a repeater or fire alarm according to one embodiment, when viewed from below. [Figure 4] A schematic diagram showing the external appearance of a base or repeater according to one embodiment, viewed from above. [Figure 5] A schematic diagram showing the appearance of an assembly (connected state) according to one embodiment when viewed horizontally. [Figure 6] A schematic diagram showing the appearance of an assembly (separated state) in a modified form when viewed horizontally. [Figure 7] A schematic diagram showing the appearance of an assembly (connected state) in a modified form when viewed horizontally. [Figure 8] A schematic diagram showing the appearance of an assembly (separated state) in a modified form when viewed horizontally. [Figure 9] A schematic diagram showing the appearance of an assembly (connected state) in a modified form when viewed horizontally. [Figure 10] A schematic diagram showing the appearance of an assembly (separated state) in a modified form when viewed horizontally. [Figure 11] A schematic diagram showing the appearance of an assembly (connected state) in a modified form when viewed horizontally. [Figure 12] A schematic diagram showing the appearance of an assembly (separated state) in a modified form when viewed horizontally. [Figure 13]A diagram schematically showing the appearance of an assembly (connected state) according to a modified example when viewed horizontally. [Figure 14] A diagram schematically showing the appearance of an assembly (separated state) according to a modified example when viewed horizontally. [Figure 15] A diagram schematically showing the appearance of an assembly (connected state) according to a modified example when viewed horizontally. [Figure 16] A diagram schematically showing the appearance of an assembly (separated state) according to a modified example when viewed horizontally. [Figure 17] A diagram schematically showing the appearance of an assembly (connected state) according to a modified example when viewed horizontally. [Figure 18] A diagram schematically showing the appearance of an assembly (connected state) according to a modified example when viewed from above. [Figure 19] A diagram schematically showing the appearance of an assembly (connected state) according to a modified example when viewed from above.

Modes for Carrying Out the Invention

[0012] [Embodiment] Hereinafter, a fire alarm system according to an embodiment of the present invention will be described. FIG. 1 is a diagram schematically showing the configuration of a fire alarm system according to an embodiment. In the monitoring area A, a plurality of fire alarms including one master unit are arranged. Specifically, in the monitoring area A, as fire alarms, a master unit 10A, slave units 11A-1, slave units 11A-2, and slave units 11A-3 are arranged. Also, a repeater 20A is arranged in the monitoring area A.

[0013] The master unit 10A is equipped with a wireless communication interface (IF) for wireless communication with each of the slave units 11A-1, 11A-2, and 11A-3 (hereinafter collectively referred to as slave units 11A) and the repeater 20A. The master unit 10A can communicate wirelessly with each of the slave units 11A. The master unit 10A and the multiple slave units 11A constitute a single group (an example of a first group) that communicates wirelessly with each other. In addition, the master unit 10A can communicate wirelessly with the repeater 20A located in the same monitoring area (i.e., monitoring area A) as the monitoring area where the master unit 10A is located. Each slave unit 11A is equipped with at least a wireless communication interface for wireless communication with the master unit 10A.

[0014] Monitoring area B, like monitoring area A, is equipped with multiple fire alarms, including one master unit. Specifically, monitoring area B is equipped with master unit 10B, slave units 11B-1, 11B-2, and 11B-3 as fire alarms. In addition, monitoring area B is equipped with repeater 20B.

[0015] The master unit 10B is equipped with a wireless communication interface (IF) that communicates wirelessly with each of the slave units 11B-1, 11B-2, and 11B-3 (hereinafter collectively referred to as slave units 11B) and the repeater 20B. The master unit 10B can communicate wirelessly with each of the slave units 11B. The master unit 10B and the multiple slave units 11B constitute a single group (an example of a second group) that communicates wirelessly with each other. In addition, the master unit 10B can communicate wirelessly with the repeater 20B located in the same monitoring area (i.e., monitoring area B) as the monitoring area where the master unit 10B is located. Each slave unit 11B is equipped with at least a wireless communication interface (IF) that communicates wirelessly with the master unit 10B.

[0016] Repeater 20A and Repeater 20B can communicate wirelessly with each other. Wireless communication between the master unit 10A and the slave unit 11A in monitoring area A, wireless communication between the master unit 10B and the slave unit 11B in monitoring area B, and wireless communication between Repeater 20A and Repeater 20B are performed according to the same communication protocol, but each uses a different communication channel and each communication is isolated. Note that these wireless communications may be performed according to different communication protocols.

[0017] Within the same group, different child units may communicate without going through the master unit, but at least communication between different child units via the master unit is ensured. Also, within the same group, child units and repeaters may communicate without going through the master unit, but at least communication between child units and repeaters via the master unit is ensured.

[0018] As described above, by equipping each of the two monitoring areas with a repeater, master units within each area can communicate with each other via the repeater. Even when it is necessary to monitor a space that is too large for a single master unit to use wireless communication, the ability for master units located in different areas to communicate with each other allows for monitoring of a large space. As a result, for example, if a slave unit 11A-1 located in monitoring area A detects a fire, an alarm can be triggered simultaneously not only on the master unit 10A and slave unit 11A located in monitoring area A, but also on the master unit 10B and slave unit 11B located in monitoring area B (e.g., by emitting an alarm sound).

[0019] The worker installing the fire alarms shall install each fire alarm on the installation surface (ceiling, wall, etc.) of the monitoring area so that wireless communication is ensured between the master unit and the slave unit in each monitoring area, and wireless communication is ensured between the master unit and the repeater in each monitoring area. In addition, the worker shall install the repeater in connection with any of the fire alarms so that wireless communication is ensured between repeaters in different monitoring areas.

[0020] In the following description, repeaters 20A and 20B will be collectively referred to as repeater 20, master units 10A and 10B will be collectively referred to as master unit 10, slave units 11A and 11B will be collectively referred to as slave unit 11, and master unit 10 and slave unit 11 will be collectively referred to as fire alarm 100. Also, in the following description, for convenience, the installation surface will be assumed to be the ceiling surface (the underside of the ceiling), and the part of the device on the installation surface side will be referred to as the top, and the part opposite the installation surface will be referred to as the bottom.

[0021] As described above, in this embodiment, the repeater 20 is installed in a state connected to one of the fire alarms 100. The fire alarm 100 is installed on the installation surface via a base 30, which is an installation component. Hereinafter, the assembly 1 will refer to the base 30, repeater 20, and fire alarm 100 connected in a stacked state.

[0022] Figure 2 schematically shows the appearance of assembly 1 in its separated state when viewed horizontally. In Figure 2, assembly 1 consists of a base 30, a repeater 20, and a fire alarm 100, in order from the side closest to the ceiling surface C.

[0023] The base 30 is equipped with the main body 301. The base 30 is installed on the ceiling surface C and serves as a base for attaching the fire alarm 100 to the mounting surface.

[0024] The repeater 20 comprises a housing 201 and a plurality of claws 202. The claws 202 are components for connecting the repeater 20 and the base 30.

[0025] The fire alarm 100 comprises a housing 101 and a plurality of claws 102. The claws 102 are components for connecting the fire alarm 100 to the repeater 20. A plurality of ventilation holes H1 are provided on the lower side of the housing 101. The fire alarm 100 detects a fire by using a sensor (not shown) inside the housing 101 to detect smoke contained in the air entering and exiting through the ventilation holes H1 (smoke type) or by detecting the heat of the air entering and exiting through the ventilation holes H1 (heat type).

[0026] Figure 3 is a schematic diagram showing the appearance of the repeater 20 or the fire alarm 100 when viewed from below. As shown in Figure 3, the repeater 20 has four claws 202 on its upper surface, and the fire alarm 100 has four claws 102 on its upper surface.

[0027] Figure 4 is a schematic diagram showing the external appearance of the base 30 or repeater 20 when viewed from above. As shown in Figure 4, four holes H3 are provided on the lower surface of the base 30, and four holes H2 are provided on the lower surface of the repeater 20.

[0028] The hole H3 in the base 30 is positioned to correspond to the claw 202 of the repeater 20. Similarly, the hole H2 in the repeater 20 is positioned to correspond to the claw 102 of the fire alarm 100.

[0029] Furthermore, the shape and size of the hole H3 in the base 30 and the claw 202 of the repeater 20 are designed such that when the repeater 20 is rotated around a vertical axis with the claw 202 inserted into the hole H3, the claw 202 will catch on the main body 301 of the base 30. Similarly, the shape and size of the hole H2 in the repeater 20 (an example of a repeater-side connection mechanism) and the claw 102 of the fire alarm 100 (an example of a fire alarm-side connection mechanism) are designed such that when the fire alarm 100 is rotated around a vertical axis with the claw 102 inserted into the hole H2, the claw 102 will catch on the housing 201 of the repeater 20.

[0030] The worker can connect the base 30 and repeater 20 by inserting the claws 202 of the repeater 20 into the holes H3 of the base 30 installed on the ceiling surface and rotating the repeater 20 around its vertical axis. The worker can also separate the connected base 30 and repeater 20 by performing the reverse operation. Similarly, the worker can connect the separated repeater 20 and fire alarm 100 by inserting the claws 102 of the fire alarm 100 into the holes H2 of the repeater 20 connected to the base 30 and rotating the fire alarm 100 around its vertical axis. The worker can also separate the connected repeater 20 and fire alarm 100 by performing the reverse operation.

[0031] Figure 5 schematically shows the appearance of assembly 1 in its connected state when viewed horizontally.

[0032] Of the multiple fire alarms 100, those not connected to the repeater 20 are directly connected to the base 30 and installed on the mounting surface via the base 30.

[0033] In this way, by positioning the repeater 20 between the base 30 and the fire alarm 100, the number of devices installed on the installation surface of the monitoring area can be reduced.

[0034] [Differentiation] The embodiments described above are specific examples of the present invention and can be modified in various ways within the scope of the technical idea of ​​the present invention. Examples of such modifications are shown below. Two or more of the following modifications may be combined as appropriate.

[0035] (Variation 1) The base 30 and the repeater 20 may be integrated into a single unit.

[0036] Figure 6 schematically shows the appearance of the separated assembly 1 according to this modified example when viewed horizontally. In this modified example, the assembly 1 includes a base-integrated repeater 40 instead of the base 30 and repeater 20 in the above-described embodiment.

[0037] The base-integrated repeater 40 is directly attached to the installation surface. Furthermore, the lower surface of the housing 401 of the base-integrated repeater 40 is provided with holes (not shown) similar to the holes H2 provided in the repeater 20 according to the above embodiment.

[0038] Figure 7 is a schematic diagram showing the appearance of the connected assembly 1 in this modified example when viewed horizontally.

[0039] (Modification 2) The repeater 20 and the fire alarm 100 may be connected via a connecting member.

[0040] Figure 8 is a schematic diagram showing the appearance of the separated assembly 1 according to this modified example when viewed horizontally. The assembly 1 according to this modified example includes a connecting member 50 which is a member that connects the repeater 20 and the fire alarm 100. The connecting member 50 includes a main body 501 and a plurality of claws 502 provided on the upper surface of the main body 501. The claws 502 of the connecting member 50 (an example of the first connecting mechanism) are designed in terms of position, size, and shape so as to engage with the holes H2 of the repeater 20.

[0041] Furthermore, the lower surface of the main body 501 of the connecting member 50 is provided with multiple holes (an example of the second connecting mechanism, not shown). The position, size, and shape of the holes in the connecting member 50 are designed to engage with the claws 102 of the fire alarm 100.

[0042] Figure 9 is a schematic diagram showing the appearance of the connected assembly 1 in this modified example when viewed horizontally.

[0043] According to this modified example, the repeater 20 and the fire alarm 100 can be connected via the connecting member 50, even if the hole H2 of the repeater 20 and the claw 102 of the fire alarm 100 are not in a position, size, or shape that would allow them to engage with each other.

[0044] (Variation 3) The relative positions of the repeater 20 and the fire alarm 100 may be reversed.

[0045] Figure 10 schematically shows the appearance of the separated assembly 1 in this modified example when viewed horizontally. Figure 11 schematically shows the appearance of the connected assembly 1 in this modified example when viewed horizontally.

[0046] In this modified example, the lower surface of the housing 101 of the fire alarm 100 is provided with a hole (not shown) similar to the hole H2 provided in the housing 201 of the repeater 20 according to the above embodiment. Furthermore, in this modified example, the housing 201 of the repeater 20 does not have the hole H2 provided in the above embodiment.

[0047] In this modified example, the ventilation opening H1 of the fire alarm 100 is closer to the installation surface compared to the embodiment described above. Therefore, when a fire occurs, smoke-containing air or hot air can easily pass through the ventilation opening H1 and reach the sensor inside the housing 101 of the fire alarm 100.

[0048] (Modification 4) When the fire alarm 100 according to the above embodiment is installed on the installation surface via the repeater 20, it is separated from the installation surface by the height of the repeater 20. Therefore, compared to when the fire alarm 100 is installed on the installation surface without the repeater 20, it may be more difficult for smoke-containing air or high-temperature air to reach the vent H1 when a fire occurs. To mitigate such inconveniences, a repeater 20 with a flatter shape may be used compared to the repeater 20 according to the above embodiment.

[0049] Figure 12 schematically shows the appearance of the separated assembly 1 in this modified example when viewed horizontally. Figure 13 schematically shows the appearance of the connected assembly 1 in this modified example when viewed horizontally.

[0050] In this modified assembly 1, when viewed in a direction perpendicular to the installation surface, the repeater 20 has a portion located outside the connected fire alarm 100. That is, the repeater 20 in this modified form has a shorter height but a similar volume compared to the repeater 20 in the above embodiment.

[0051] According to this modified assembly 1, compared to the assembly 1 according to the above embodiment, the fire alarm 100 is closer to the installation surface, which may be desirable from the viewpoint of early fire detection.

[0052] In this modified example, in order to bring the fire alarm 100 even closer to the installation surface than in the examples shown in Figures 12 and 13, at least a portion of the fire alarm 100 may be housed in the repeater 20.

[0053] Figure 14 schematically shows the appearance of assembly 1, in which a portion of the fire alarm 100 is housed in the repeater 20, when viewed horizontally in a separated state. Figure 15 schematically shows the appearance of assembly 1, as shown in Figure 14, when connected, when viewed horizontally.

[0054] In the assembly 1 shown in Figures 14 and 15, the housing 201 of the repeater 20 is provided with a recess H4 that extends upward from the bottom surface and accommodates a portion of the upper part of the fire alarm 100. The worker connects the repeater 20 and the fire alarm 100 with the upper part of the fire alarm 100 fitted into the recess H4 of the repeater 20.

[0055] Alternatively, the entire fire alarm 100 may be housed in the recess H4 of the repeater 20. In that case, the ventilation opening H1 of the fire alarm 100 may be provided, for example, on the bottom surface of the housing 101.

[0056] Alternatively, the recess H4 of the repeater 20 may be a hole that penetrates the housing 201 vertically, i.e., a bottomless recess. In this case, the fire alarm 100 may be connected to the base 30 instead of the repeater 20.

[0057] In this modified example, the portion of the repeater 20 located outside the fire alarm 100 when viewed perpendicular to the installation surface may be designed to be inclined with respect to the installation surface in order to facilitate air flow into the vent H1 of the fire alarm 100.

[0058] Figure 16 schematically shows the appearance of the separated assembly 1 when the repeater 20, according to the modified example shown in Figures 14 and 15, is modified to include an inclined surface P1, as viewed horizontally. Figure 17 schematically shows the appearance of the connected assembly 1 as shown in Figure 16, as viewed horizontally.

[0059] Of the housing 201 of the repeater 20, the portion located outside the fire alarm 100 when viewed perpendicular to the installation surface constitutes an inclined surface P1 that is tilted relative to the installation surface. The inclined surface P1 serves to guide air from the installation surface to the vent H1 of the fire alarm 100 connected to the repeater 20.

[0060] The inclined surface P1 of the repeater 20 shown in Figures 16 and 17 is flat, but the inclined surface P1 may also be a curved surface.

[0061] (Variation 5) In the connected state, the shape of the fire alarm 100 may be designed so that the fire alarm 100 does not block the operating unit of the repeater 20 that accepts user operations, or the notification unit of the repeater 20 that notifies the user.

[0062] Figure 18 is a schematic diagram showing the appearance of the connected assembly 1 according to this modified example, viewed from above. In the assembly 1 shown in Figure 18, the repeater 20 is positioned between the installation surface and the fire alarm 100, similar to the assembly 1 according to the above embodiment.

[0063] The repeater 20 shown in Figure 18 has a button 204 located on its underside. This button 204 serves both as an operation unit that receives user commands, such as stopping the buzzer sound, and as a notification unit that notifies the user, for example, by illuminating an LED or emitting a buzzer sound, of a fire detection alarm. Note that the button 204 may have only one of the functions of the operation unit or the notification unit.

[0064] As shown in Figure 18, the housing 101 of the fire alarm 100 is shaped so as not to block the button 204 when the fire alarm 100 is connected to the repeater 20. The number of buttons 204 on the underside of the housing 201 may be multiple.

[0065] Furthermore, in the assembly 1 according to modification 3 (see Figures 10 and 11), the shape of the repeater 20 may be designed so as not to obstruct the operating unit of the fire alarm 100 that accepts user operations, or the notification unit of the fire alarm 100 that notifies the user.

[0066] Figure 19 is a schematic diagram showing the appearance of the connected assembly 1 according to this modified example, viewed from above. In the assembly 1 shown in Figure 19, the fire alarm 100 is positioned between the installation surface and the repeater 20, similar to the case of the assembly 1 according to the modified example 3 described above.

[0067] The fire alarm 100 shown in Figure 19 has a button 104 located on its underside. This button 104 serves both as an operation unit that receives operations from the user, such as stopping the buzzer sound, and as a notification unit that notifies the user of fire detection alarms, such as by illuminating an LED or emitting a buzzer sound. Note that the button 104 may have only one of the functions of the operation unit or the notification unit.

[0068] As shown in Figure 19, the housing 201 of the repeater 20 is shaped so as not to block the button 104 when the repeater 20 is connected to the fire alarm 100. The number of buttons 104 on the underside of the housing 101 may be multiple.

[0069] (Experimental variation 6) In the assembly 1 according to the above embodiment, the repeater 20 may be installed independently at a location different from where the fire alarm 100 is installed. In that case, for example, the lower surface of the repeater 20 may be covered with a cover to improve the aesthetic appearance of the repeater 20. In that case, the cover may consist of a plate-shaped body and claws similar to the claws 102 of the fire alarm 100, provided on the upper surface of the body.

[0070] Furthermore, in the assembly 1 according to the modified example 3 (see Figures 10 and 11), the lower surface of the fire alarm 100, which is not connected to the repeater 20, may be covered with a cover in order to improve its appearance. In that case, the cover may consist of a plate-shaped body and claws on the upper surface of the body similar to the claws 202 of the repeater 20.

[0071] (Example 7) The shape of the fire alarm 100, repeater 20, and base 30 when viewed perpendicular to the installation surface is not limited to the circular shape exemplified in the above embodiment, but may be an ellipse, a polygon, or other shape. Furthermore, the configuration of the connecting mechanism that links two of the fire alarm 100, repeater 20, and base 30 is not limited to the configuration exemplified in the above embodiment, and other configurations may be adopted. For example, a connecting mechanism consisting of claws and holes that allows connection and disconnection by sliding in a direction parallel to the installation surface, instead of rotation around an axis perpendicular to the installation surface, may be adopted. Alternatively, a connecting mechanism that allows connection by screwing or by magnetic force may be adopted.

[0072] (Variation 8) In the above-described embodiment, the master unit 10A and master unit 10B communicate with each other via repeaters 20A and 20B. Alternatively, master unit 10A and master unit 10B may communicate via a single repeater 20. [Explanation of Symbols]

[0073] 1...Assembly, 10...Master unit, 11...Slave unit, 20...Repeater, 30...Base, 40...Base-integrated repeater, 50...Connecting component, 100...Fire alarm, 101...Housing, 102...Claw, 104...Button, 201...Housing, 202...Claw, 204...Button, 301...Main unit, 401...Housing, 501...Main unit, 502...Claw.

Claims

1. A relay that wirelessly relays communication between at least one of a plurality of fire alarms included in a first group and at least one of a plurality of fire alarms included in a second group, The relay-side connection mechanism is equipped with a repeater-side connection mechanism that can switch between a connected state, in which it is connected to a fire alarm-side connection mechanism of any fire alarm included in the first group, and a separated state, in which it is separated from the fire alarm-side connection mechanism. If the connected fire alarms have at least one of an operation unit that accepts user input and a notification unit that notifies the user, in the connected state, at least one of the operation unit and the notification unit is not blocked. Repeater.

2. The device includes a fire alarm-side coupling mechanism that can switch between a connected state, in which it is connected to a repeater-side coupling mechanism of a repeater that wirelessly relays communication between at least one of a plurality of fire alarms included in a first group including itself and at least one of a plurality of fire alarms included in a second group, and a separated state, in which it is separated from the repeater-side coupling mechanism. The aforementioned fire alarm-side connecting mechanism is provided on the side of the housing opposite to the mounting surface. The relay is connected to the fire alarm side connecting mechanism, and is positioned between the relay and the installation surface. Fire alarm.

3. A fire alarm-side connecting mechanism that can switch between a connected state, in which the device is connected to a repeater-side connecting mechanism of a repeater that wirelessly relays communication between at least one of a plurality of fire alarms included in a first group including itself and at least one of a plurality of fire alarms included in a second group, and a separated state, in which the device is separated from the repeater-side connecting mechanism. If the connected relay has at least one of an operation unit that accepts user input and a notification unit that provides notifications to the user, in the connected state, at least one of the operation unit and the notification unit is not blocked. Fire alarm.

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