Fire sensor

Abstract

To provide a fire sensor capable of improving visibility in regard to notification by display.SOLUTION: A fire sensor (100) comprises a first cover (10) provided with a contact face (15) in contact with an installation face (W), a second cover (20) provided so as to be opposed to an opposite face (16) of the contact face (15), and an indicator lamp (22) provided in an internal space (S) formed by the first cover (10) and the second cover (20). A gap (G) is formed between the first cover (10) and the second cover (20). The indicator lamp (22) provided at a position where light from the indicator lamp (22) leaks outside from the gap (G) illuminates a periphery of the installation face by indirect lighting, when sensing fire.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a fire detector that notifies the occurrence of a fire by lighting up an indicator. [Background technology]

[0002] A fire detector can alert the user to the occurrence of a fire by turning on an indicator light. Also, a fire detector can inform the user whether the current operating mode is the setting / registration mode or the fire monitoring mode by changing the color of the indicator light.

[0003] In addition, with wireless interlocking fire detectors, the light colors can be made different, such as the fire detector that detected the fire lighting up red and the other fire detectors lighting up orange, etc. This allows users to identify the fire detector that detected the fire by checking the light color.

[0004] The following technology has been disclosed as a fire detector that displays an illuminated display (see, for example, Patent Document 1): The fire detector of Patent Document 1 improves visibility by reflecting light from the display unit using a reflector. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-93661 Summary of the Invention [Problem to be solved by the invention]

[0006] Here, a conventional fire detector will be described as an example.

[0007] Fig. 12 is a perspective view showing a conventional fire detector 200. The conventional fire detector 200 shown in Fig. 12 is attached to an installation surface W such as a wall or ceiling, and monitors for the occurrence of a fire.

[0008] Fire detector 200 is configured with an indicator light 211 that lights up when a fire is detected, provided on the top surface of cover 210 that constitutes the exterior. This indicator light 211 also functions as an alarm stop / test button, and can be used by the user to stop the alarm that is sounding or to test the operation.

[0009] As shown in FIG. 12, the indicator light 211 of the conventional fire detector 200 is small, and therefore improvement in visibility is desired.

[0010] In Patent Document 1, visibility from a certain direction is improved by providing a reflector. However, the reflector needs to be provided inside the device, which increases the number of parts and the process of attaching the reflector.

[0011] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a fire detector that can improve the visibility of notifications displayed. [Means for solving the problem]

[0012] The fire detector of the present disclosure comprises a first cover having a contact surface that contacts the installation surface, a second cover that is arranged to face the opposite side of the contact surface, and an indicator light that is arranged in the internal space formed by the first cover and the second cover, wherein a gap is formed between the first cover and the second cover, and the indicator light is arranged in a position where light from the indicator light leaks out through the gap to the outside. [Effects of the Invention]

[0013] According to the present disclosure, a fire detector can be obtained that can improve the visibility of notifications displayed. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view illustrating an example of the appearance of a fire detector according to a first embodiment. [Figure 2] 2 is a plan view showing the inner configuration of the second cover shown in FIG. 1. FIG. [Figure 3] 2 is a plan view showing the inner configuration of the first cover shown in FIG. 1. FIG. [Figure 4] FIG. 2 is a schematic diagram showing a cross section of a fire detector. [Figure 5] 2 is a diagram showing a display mode of the fire detector 100 shown in FIG. 1. FIG. [Figure 6] 6 is a diagram showing the fire detector shown in FIG. 5 in a state where the entire second cover is pressed. [Figure 7] FIG. 6 is a diagram showing the extinguished state of the fire detector shown in FIG. 5. [Figure 8] 3 is a diagram illustrating an example of an interlocking function in the fire detector of the first embodiment. FIG. [Figure 9] 9 is a diagram showing a lighting control table for performing the lighting control shown in FIG. 8. FIG. [Figure 10] 9 is a diagram showing an example of lighting display of each fire detector when the master unit detects a fire in the configuration shown in FIG. 8. FIG. [Figure 11] 11 is a diagram showing a lighting control table for performing the lighting control shown in FIG. 10. FIG. [Figure 12] FIG. 1 is a perspective view showing a conventional fire detector. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, preferred embodiments of the fire detector of the present disclosure will be described with reference to the drawings. The fire detector disclosed herein does not have the indicator light that was previously provided on the top surface of the cover, but instead has an indicator light provided inside the fire detector. The fire detector disclosed herein also features a gap in the cover that constitutes the exterior, and the indicator light is positioned so that light can leak out through this gap to the outside, thereby improving visibility.

[0016] In the following description, the invention is described as a fire detector, but it is also possible to apply the invention to a fire alarm in which the fire detector itself has an alarm function.

[0017] Embodiment 1 FIG. 1 is a perspective view illustrating an example of the appearance of a fire detector according to the first embodiment. The fire detector 100 includes a first cover 10 and a second cover 20, and is configured so that the second cover 20 covers the first cover 10.

[0018] A smoke inlet 25 is formed on the side of the second cover 20 to take in smoke in the event of a fire. When a smoke detector (not shown) detects the smoke taken into the interior through the smoke inlet 25, the fire detector 100 issues an alarm by sounding an alarm and turning on a light.

[0019] The fire detector 100 is a wireless interlocking detector that operates in conjunction with other fire detectors 100 by forming a group in which multiple child detectors belong to one parent detector. The interlocking function of this fire detector 100 will be described later.

[0020] Fig. 2 is a plan view showing the inner configuration of the second cover 20 shown in Fig. 1. Fig. 3 is a plan view showing the inner configuration of the first cover 10 shown in Fig. 1. Fig. 4 is a schematic diagram showing a cross section of the fire detector 100.

[0021] 2, the position of the first cover 10 is indicated by a broken line. Also, FIG. 4 shows a cross section taken along line AA shown in FIGS.

[0022] In FIG. 2, a substrate 30 is provided inside the second cover 20, and a switch 21 and a plurality of indicator lights 22 are provided on the surface of the substrate 30.

[0023] A control unit that provides the functions that the fire detector 100 originally has, such as a smoke detection function, an alarm function, and a function of interlocking with other detectors, is mounted on the substrate 30 as an electric circuit.

[0024] Switch 21 is a push-button switch that has the same function as a conventional alarm stop / test button. When switch 21 is operated, a control unit mounted on substrate 30 switches indicator light 22 between on and off states.

[0025] As shown in FIG. 1, the switch 21 in the first embodiment is not exposed on the surface, and is configured to be pressed down when the first cover 10 and the second cover 20 approach each other, as will be described in more detail later.

[0026] Each indicator light 22 is a light-emitting element that includes a combination of three LEDs (Light Emitting Diodes)—red, blue, and green. The indicator light 22 can emit light in various colors by combining the intensities of the red, blue, and green light.

[0027] 4, the substrate 30, the switch 21, and the plurality of indicator lights 22 are provided in an internal space S formed by the first cover 10 and the second cover 20. The plurality of indicator lights 22 are provided at four locations on one side of the substrate 30 at equal intervals along the circumferential direction so as to surround the internal space S.

[0028] The battery storage section 23 shown in FIG. 2 is a box that stores a dedicated lithium battery, and supplies power to the board 30 via a battery connector (not shown).

[0029] A protrusion 11 and a biasing portion 12 are provided on the inside of the first cover 10 shown in FIG.

[0030] The protrusion 11 is provided at a position corresponding to the switch 21 of the second cover 20. The protrusion 11 presses down the switch 21 when the first cover 10 and the second cover 20 approach each other.

[0031] The biasing portion 12 is a spring that biases the first cover 10 and the second cover 20 from a state in which they are close to each other to return to their original retracted position. This retracted position is a position in which the second cover 20 is held by the first cover 10, and a stopper is provided to prevent the first cover 10 and the second cover 20 from moving further apart.

[0032] In Fig. 4, the installation surface W is a wall, ceiling, etc. on which the fire detector 100 is attached. For convenience, Fig. 4 shows the installation surface W facing downwards.

[0033] The contact surface 15 of the first cover 10 is a surface that contacts the installation surface W. The second cover 20 is provided so as to face a surface 16 opposite to the contact surface 15.

[0034] The second cover 20 is provided so as to be movable toward or away from the first cover 10 in the direction of extension and contraction of the biasing portion 12, that is, in the direction facing the opposite surface 16.

[0035] Furthermore, since the diameter of the second cover 20 is larger than the diameter of the first cover 10, a gap G is formed between the second cover 20 and the first cover 10. As shown in FIG. 4, when the contact surface 15 is in contact with the installation surface W, the gap G opens toward the installation surface W.

[0036] Furthermore, the indicator light 22 is provided at a position where the emitted light leaks to the outside through the gap G. In the example of FIG. 4, the indicator light 22 is provided at a position where it can project light onto the installation surface W through the gap G when the abutment surface 15 is in abutment with the installation surface W. In the first embodiment, the indicator light 22 is provided between the side wall 10a of the first cover 10 and the side wall 20a of the second cover 20.

[0037] Next, the display mode of the fire detector 100 will be described.

[0038] Fig. 5 is a diagram showing a display mode of the fire detector 100 shown in Fig. 1. When an actual fire occurs or an operation test for lighting is performed, the fire detector 100 displays in the mode shown in Fig. 5.

[0039] That is, with the configuration described above, light from the indicator light 22 leaks from the inside of the fire detector 100 to the outside through the gap G and is projected onto the installation surface W. Therefore, as shown in FIG. 5 , the light from the indicator light 22 is reflected by the installation surface W and illuminates a wide area around the fire detector 100 as reflected light L.

[0040] In this way, the fire detector 100 projects light onto the installation surface W, and thus employs a lighting method that indirectly brightens the space by utilizing reflected light, like indirect lighting.

[0041] Here, the configuration related to the indicator light 22 will be described in detail using the cross-sectional view of Figure 4. The size (width) of the gap G between the first cover 10, the second cover 20, and the side walls is approximately the same as the outer diameter of the indicator light 22 in the drawing, and the larger the size of this gap G, the larger the area of the installation surface illuminated when the indicator light 22 is turned on, which is preferable. The height of the side walls of the second cover 20 is formed to be at least shorter than the height of the side walls of the first cover 10, and is long enough so that the tips of the side walls do not come into contact with the installation surface W. This is because if the gap between the installation surface W and the side walls of the second cover 20 is narrow, the light from the indicator light 22 is less likely to leak.

[0042] Therefore, the fire detector 100 can display a wider range than the conventional configuration shown in FIG. 12, and can improve visibility for the user.

[0043] Next, an operation for turning off the fire detector 100 that is in the on state will be described.

[0044] Figure 6 is a diagram showing the fire detector 100 shown in Figure 5 with the entire second cover 20 pressed toward the first cover 10, and Figure 7 is a diagram showing the fire detector 100 shown in Figure 5 in an off state.

[0045] When a user presses the entire second cover 20 in the direction of the arrow shown in Fig. 6, the first cover 10 and the second cover 20 move closer to each other, and the protrusion 11 shown in Fig. 4 presses the switch 21. This activates the switch 21.

[0046] The control unit mounted on the substrate 30 monitors whether the switch 21 has been activated, and when it detects that the switch 21 has been activated, it switches the indicator light 22 from a lit state to an extinguished state as shown in FIG. 7.

[0047] When the user releases the second cover 20 and the pressure on the second cover 20 is released, the biasing portion 12 biases the second cover 20 in the direction of the arrow shown in Fig. 7 so that the second cover 20 returns to its original retracted position. As a result, the entire second cover 20 returns to the state it was in before being pressed.

[0048] In Figures 5 to 7, the example shows that the light is changed from the lit state to the off state by pressing the entire cover of the second cover 20, but conversely, the same operation can be used to change the light from the off state in a non-fire state to the lit state.

[0049] That is, the control unit mounted on the substrate 30 turns on the indicator light 22 in a detected state in which a fire has been detected, and when it detects operation of the switch 21 in the detected state, it turns off the indicator light 22. On the other hand, the control unit mounted on the substrate 30 turns off the indicator light 22 in a non-detected state in which a fire has not been detected, and when it detects operation of the switch 21 in the non-detected state, it turns on the indicator light 22.

[0050] Up to this point, the functions and operations of the fire detector 100 as a single unit have been described, but hereinafter, an example of the operation relating to the display when a plurality of fire detectors 100 are linked together will be described.

[0051] As described above, the control unit mounted on the substrate 30 of the fire detector 100 has, as its original function, the function of operating in conjunction with other fire detectors 100 via wireless communication.

[0052] In addition to this original function, the fire detector 100 in the first embodiment is configured so that the four indicator lights 22 can be individually turned on and off under the control of a control unit mounted on the substrate 30.

[0053] Furthermore, the fire detector 100 has a function of turning on, in the event of a fire, one of the multiple indicator lights 22 that is provided on the side of the fire detector 100 that detected the fire, under the control of a control unit implemented on the substrate 30. This lighting method allows the user to visually check the fire detector 100 and confirm its lit position, thereby grasping the relative direction of the fire.

[0054] Below, a specific example will be given for explanation.

[0055] FIG. 8 is a diagram illustrating an example of the interlocking function in the fire detector 100 according to the first embodiment.

[0056] In the following description, it is assumed that six fire detectors 100, namely, a master device 100A and slave devices 100B to 100F, are installed in a building.

[0057] In FIG. 8, it is assumed that parent device 100A and child devices 100B to 100D are arranged side by side in respective sections at the back of the page, and child devices 100E and 100F are arranged side by side in respective sections at the front of the page.

[0058] Furthermore, in the following description, symbols are assigned according to the position of the lit light. Here, the back side of the page is position L1, the right side is position L2, the front side is position L3, and the left side is position L4. Positions L1 to L4 are shown with respect to the master unit 100A in FIG. 8.

[0059] In Figure 8, if a fire breaks out in the compartment where the sub-unit 100C is installed, the main unit 100A will turn on only the right-hand indicator light 22 on the side of the sub-unit 100C out of the four indicator lights 22, i.e., the one indicator light 22 installed at position L2.

[0060] Similarly, since the slave device 100B, which is provided on the right side of the installation position of the slave device 100B, has detected a fire, only one indicator light 22 provided at position L2 is turned on.

[0061] Since the sub-device 100C itself has detected a fire, it turns on all four indicator lights 22.

[0062] Since the slave device 100C, which is provided to the left of the installation position of the slave device 100D, has detected a fire, the slave device 100D turns on only one indicator light 22 at position L4.

[0063] Since the sub-device 100C, which is provided at the rear right of the installation position of the sub-device 100E, has detected a fire, the sub-device 100E turns on the two indicator lights 22 at positions L1 and L2.

[0064] Since the child device 100C, which is provided at the rear left of the child device 100F, has detected a fire, the child device 100F turns on the two indicator lights 22 at positions L1 and L4.

[0065] By doing this, for example, a user staying near the parent unit 100A can recognize that a fire is occurring on the right side of the page, and a user staying near the child unit 100F can recognize that a fire is occurring on the far left side of the page.

[0066] This allows users who wish to evacuate to take measures such as evacuating in the opposite direction to the lighting position. Also, users who wish to identify the source fire detector can easily identify the source fire detector that detected the fire from the lighting status of each of the master unit 100A and slave units 100B to 100F.

[0067] FIG. 9 is a diagram showing a lighting control table for performing the lighting control shown in FIG.

[0068] The lighting control table is a correspondence table in which the vertical axis indicates the fire detector 100 that is the target of lighting control, and the horizontal axis indicates the indicator lamp 22 that should be turned on by that fire detector 100.

[0069] 9 shows a table for when the slave device 100C detects a fire. In addition to this, lighting control tables are prepared in advance for each fire detector 100, such as a table for when the master device 100A detects a fire and a table for when the slave device 100B detects a fire, which will be described later. Each of these lighting control tables is stored in the master device 100A.

[0070] When master unit 100A receives a fire signal via wireless communication from slave units 100B-100F that have detected a fire, master unit 100A acquires a lighting control table for the slave unit that detected the fire. In the example of Fig. 8, master unit 100A receives a fire signal from slave unit 100C that has detected a fire, and therefore acquires the lighting control table for slave unit 100C shown in Fig. 9.

[0071] The master device 100A refers to the lighting control table and turns on the indicator lamp 22 determined by the lighting control table among its own four indicator lamps 22. The master device 100A then transmits a command to each of the slave devices 100B to 100F instructing which indicator lamp 22 to turn on.

[0072] In the example of Figure 8, the parent unit 100A controls the indicator light 22 at its own position L2 to be turned on and the indicator lights 22 at other positions L1, L3, and L4 to be turned off by referring to the lighting control table shown in Figure 9.

[0073] Furthermore, by referring to the lighting control table, the parent device 100A instructs the child device 100B to turn on the indicator light 22 at position L2 and to turn off the indicator lights 22 at other positions L1, L3, and L4.

[0074] Furthermore, by referring to the lighting control table, master device 100A commands slave device 100C to turn on all indicator lights 22, and commands slave device 100D to turn on indicator light 22 at position L4 and turn off the others. Similarly, master device 100A refers to the lighting control table and transmits lighting commands for each position to slave devices 100E and 100F.

[0075] Next, a case where the master unit 100A detects a fire will be described.

[0076] Fig. 10 is a diagram showing an example of lighting display of each fire detector when the master unit 100A detects a fire in the configuration shown in Fig. 8. Fig. 11 is a diagram showing a lighting control table for performing the lighting control shown in Fig. 10.

[0077] The same method as above is used when the master unit 100A detects a fire. That is, when the master unit 100A detects a fire, the master unit 100A acquires the lighting control table shown in Fig. 11. The master unit 100A then controls its own lighting in accordance with the acquired lighting control table, and transmits lighting control commands to the slave units 100B to 100F in accordance with the lighting control table.

[0078] This allows the master unit 100A to perform lighting control as shown in FIG.

[0079] In this example, the master device 100A determines which indicator lamps 22 should be turned on for each of the slave devices 100B to 100F and transmits commands to the slave devices 100B to 100F. Alternatively, the master device 100A and the slave devices 100B to 100F may each hold their own lighting control table and determine for themselves which indicator lamps 22 should be turned on.

[0080] Although the fire detector 100 in the first embodiment has four indicator lights 22, the number is not limited to four. Furthermore, when the fire detector 100 is used alone, for example, and there is no need to indicate the direction of the fire, the number of indicator lights 22 may be one.

[0081] Additionally, it is also possible to indicate the direction by the way the indicator light 22 at position L1 flashes twice and the indicator light 22 at position L2 flashes once to indicate south-southeast.

[0082] Incidentally, in the linked alarm system consisting of multiple fire detectors (fire alarms) shown in Figure 8 and subsequent figures, the fire detectors do not have to be configured as shown in Figures 1 to 4. For example, the fire detectors may be equipped with indicator lights in multiple directions (four directions: north, south, east, west). Furthermore, the fire detectors are equipped with a lighting control table for the indicator lights that should be turned on based on the positional relationship with other fire detectors in the group.

[0083] When a fire occurs, if the fire detector itself detects the fire, it will light up all four indicator lights, and if another fire detector in the group detects a fire and activates, it will control the system so that only the indicator light located in the direction of the activated fire detector is turned on.

[0084] In the above-mentioned embodiment, the lighting control table itself is transmitted and received via communication, but since each fire detector in a group consisting of a master and multiple slaves has an address, it is possible for the fire detectors to simply transmit and receive their own addresses when a fire is detected. Also, if each fire detector has a lighting control table that defines, based on its installation location, which fire detector should activate the indicator light in which direction, this table does not need to be transmitted and received.

[0085] The features of such a fire detector 100 can be summarized as follows, and the effects can be achieved as follows.

[0086] The fire detector 100 comprises a first cover 10 having a contact surface 15 that contacts the installation surface W, a second cover 20 that is arranged to face the opposite surface 16 of the contact surface 15, and an indicator light 22 that is arranged in an internal space S formed by the first cover 10 and the second cover 20.

[0087] In the fire detector 100, a gap G is formed between the first cover 10 and the second cover 20, and the indicator light 22 is positioned so that light from the indicator light 22 leaks out through the gap G to the outside.

[0088] Therefore, the fire detector 100 can irradiate light from the indicator light over a wide area onto the installation surface W, which corresponds to the outside of the first cover 10, thereby improving the visibility of notifications displayed.

[0089] Furthermore, when the contact surface 15 is in contact with the installation surface W, the gap G opens toward the installation surface W. Furthermore, the indicator light 22 is provided in a position where it can project light onto the installation surface W through the gap G when the contact surface 15 is in contact with the installation surface W.

[0090] As a result, the light from the indicator light 22 is reflected by the installation surface W and can be reflected as reflected light L to illuminate a wide area around the fire detector 100, further improving visibility.

[0091] Furthermore, in the internal space S, a switch 21 and a control unit that controls the turning on or off of the indicator light 22 are mounted on a substrate 30. The second cover 20 is held by the first cover 10 so that it can move towards or away from the first cover 10 in a direction facing the opposite surface 16. The switch 21 is activated when the first cover 10 and the second cover 20 move towards each other. When the control unit detects the activation of the switch 21, it switches the indicator light 22 on or off.

[0092] This allows the indicator light 22 to be switched on or off by pushing the second cover 20 closer to the first cover 10.

[0093] The control unit also turns on the indicator light 22 in a detected state where a fire has been detected, and when it detects operation of the switch 21 in the detected state, it turns off the indicator light 22. The control unit also turns off the indicator light 22 in a non-detected state where a fire has not been detected, and when it detects operation of the switch 21 in the non-detected state, it turns on the indicator light 22.

[0094] This allows lighting control to be performed.

[0095] There are also multiple indicator lights 22, and each indicator light 22 is provided to surround the interior space S. The control unit controls the turning on and off of the multiple indicator lights 22, and operates in conjunction with other fire detectors 100. In the event of a fire, the control unit turns on the indicator light 22 of the multiple indicator lights 22 that is provided on the side of the fire detector 100 that detected the fire.

[0096] This allows the fire detector 100 to use the indicator light 22 to indicate the direction of the other fire detector 100, i.e., the direction of the location where the fire has occurred, when another fire detector 100 detects a fire. [Explanation of symbols]

[0097] 10 first cover, 11 protrusion, 12 biasing portion, 15 abutment surface, 16 opposite surface, 20 second cover, 21 switch, 22 indicator light, 23 battery storage section, 25 smoke inlet, 30 circuit board (control section), 100 fire detector, 100A parent unit (fire detector), 100B to 100F child units (fire detectors), G gap, L reflected light, L1 to L4 positions, S internal space, W installation surface.

Claims

1. a first cover having a contact surface that contacts the installation surface; a second cover provided to face the opposite surface of the abutting surface; an indicator light provided in an internal space formed by the first cover and the second cover, A gap is formed between the first cover and the second cover, The indicator light is provided at a position where light from the indicator light leaks to the outside through the gap. fire detector.

2. the gap is open toward the installation surface when the abutment surface is in contact with the installation surface, The indicator light is provided at a position where it can project light onto the installation surface through the gap when the abutment surface is in contact with the installation surface. The fire detector according to claim 1.

3. The internal space further includes: Switch and a control unit that controls turning on or off the indicator light; is provided, the second cover is held by the first cover so as to be able to approach or move away from the first cover in a direction facing the opposite surface, the switch is activated when the first cover and the second cover approach each other; When the control unit detects the operation of the switch, it switches the indicator light on or off.

3. The fire detector according to claim 1 or 2.

4. The control unit The indicator light is turned on when a fire is detected, and when the switch is activated during the detection, the indicator light is turned off. The indicator light is turned off when a fire is not detected, and when the operation of the switch is detected during the non-detection state, the indicator light is turned on.

4. The fire detector according to claim 3.

5. There are a plurality of the indicator lights, and each of the indicator lights is provided so as to surround the internal space, The interior space is further provided with a control unit that controls the turning on and off of the plurality of indicator lights and operates in conjunction with other fire detectors, When a fire occurs, the control unit turns on an indicator light, among the plurality of indicator lights, that is provided on the side of the fire detector that detected the fire.

3. The fire detector according to claim 1 or 2.

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