Disaster prevention lighting device

Abstract

To provide a disaster prevention lighting device capable of detecting abnormality in a light source due to a cause other than a battery while suppressing sense of discomfort felt by general users.SOLUTION: A disaster prevention lighting device includes a battery, a lighting circuit, a control circuit, and a light source. The lighting circuit lights the light source by using an output current of the battery, and the control circuit controls the output current to supply electric power by which light emission by the supply becomes darker than that in emergency lighting. The disaster prevention lighting device detects presence or absence of abnormality in the light source based on light emission by electric power.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a disaster prevention lighting device. [Background technology]

[0002] Disaster prevention lighting devices, such as emergency lights and emergency exit lights, have built-in batteries. These batteries are required to keep the light source lit for an effective period of time in an emergency. For this reason, disaster prevention lighting devices must be inspected to check their performance during emergency lighting.

[0003] Patent Document 1 discloses an emergency lighting system that can be inspected without turning on the light source. This emergency lighting system has a dummy load that forms a discharge path for discharging the battery. The system then discharges the battery through the dummy load and detects the battery voltage after a specified inspection time has elapsed to determine whether the battery is normal.

[0004] Moreover, the mainstream light source in disaster prevention lighting devices is an LED or an LED module that aggregates multiple LED packages. When inspecting disaster prevention lighting devices, it is necessary to confirm that the light source can be turned on in an emergency and that the brightness of the turned on light source is sufficient. Causes of LED failure include short circuits and open circuits, as well as abnormalities in the connectors connected to the circuit or partial short circuits due to migration on the board. Therefore, for example, simply detecting the presence or absence of a light source does not allow you to determine whether the light source is abnormal. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2006-040732 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the above-mentioned emergency lighting system only judges whether the battery is normal, so it is insufficient for inspecting the light source during emergency lighting. In other words, since the light source is not turned on during inspection, there is a problem that it is not possible to detect malfunctions of the light source during emergency lighting caused by factors other than the battery.

[0007] In recent years, some disaster prevention lighting devices have an automatic inspection function. However, even with this automatic inspection, the emergency lighting status of the disaster prevention lighting device must be visually confirmed. In other words, during automatic inspection, the inspector must be present at the installation location of the disaster prevention lighting device, which creates the problem that the burden on the inspector cannot be sufficiently reduced.

[0008] Furthermore, the emergency lighting during inspection of disaster prevention lighting equipment can cause anxiety and discomfort to general users in the area, even if it is only for the purpose of inspection. If inspections are carried out at night to avoid this, there is an issue of a heavy burden on the inspectors.

[0009] In order to solve the above-mentioned problems, the present disclosure aims to provide a disaster prevention lighting device that can detect the presence or absence of an abnormality in a light source caused by factors other than a battery, while suppressing the sense of discomfort felt by general users. [Means for solving the problem]

[0010] A first aspect of the present disclosure is preferably a disaster prevention lighting device comprising a battery, a lighting circuit, a control circuit, and a light source, wherein the lighting circuit lights the light source using an output current of the battery, and the control circuit controls the output current to supply power such that the light emitted by the supply is dimmer than during emergency lighting, and the presence or absence of an abnormality in the light source is detected based on the light emitted by the power.

[0011] A second aspect of the present disclosure is preferably a disaster prevention lighting device that includes a battery, a lighting circuit, a control circuit, and a light source, wherein the lighting circuit lights the light source using the output current of the battery, and the control circuit controls the output current to supply power for an extremely short period of time such that the light emitted by the supply is not noticeable to humans, and detects the presence or absence of an abnormality in the light source based on the light emitted by the power. Effect of the Invention

[0012] According to an aspect of the present disclosure, it is possible to detect whether or not there is an abnormality in a light source caused by factors other than the battery, while suppressing any discomfort felt by general users. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view showing a disaster prevention lighting device according to a first embodiment of the present disclosure. [Diagram 2] 1 is a perspective view showing an internal structure of a disaster prevention lighting device according to a first embodiment of the present disclosure. [Diagram 3] 1 is a perspective view showing an internal structure of a light source according to a first embodiment of the present disclosure. [Figure 4] 1 is a block diagram showing a circuit configuration of a lighting unit according to a first embodiment of the present disclosure. [Diagram 5] FIG. 11 is a block diagram showing a circuit configuration of a lighting unit according to a second embodiment of the present disclosure. [Figure 6] FIG. 11 is a block diagram showing a circuit configuration of a lighting unit according to a fourth embodiment of the present disclosure. [Figure 7] FIG. 13 is a block diagram showing a circuit configuration of a lighting unit according to a fifth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] First embodiment FIG. 1 is a perspective view showing a disaster prevention lighting device according to a first embodiment of the present disclosure. Hereinafter, an embodiment for carrying out the present disclosure will be described with reference to the attached drawings. The same reference numerals in each drawing indicate the same or corresponding parts. Duplicate descriptions will be appropriately simplified or omitted.

[0015] The disaster prevention lighting device 1 includes a main body 4. The main body 4 has a spring 7 on its surface. The spring 7 is used to attach the disaster prevention lighting device 1 to a ceiling.

[0016] The main body 4 also has a frame 5 on the bottom. The frame 5 is used for attaching a light source 6, which is turned on in an emergency, to the main body 4. The frame 5 also has an inspection switch 10 and a monitor 11. The inspection switch 10 is used when checking the operation of the disaster prevention lighting device 1. The monitor 11 displays the operating status of the disaster prevention lighting device 1.

[0017] 2 is a perspective view showing an internal structure of the disaster prevention lighting device according to the first embodiment of the present disclosure. The main body 4 has the lighting unit 2 and the battery 3 built therein.

[0018] 3 is a perspective view showing an internal structure of the light source according to the first embodiment of the present disclosure. The light source 6 includes a substrate 43. A connector 42 is connected to the substrate 43. An LED chip 41, which is a light-emitting element, is disposed on the substrate 43. The connector 42 and the LED chip 41 are connected to each other.

[0019] 4 is a block diagram showing a circuit configuration of the lighting unit according to the first embodiment of the present disclosure. First, the operation of the lighting unit 2 in normal operation will be described. The lighting unit 2 rectifies the power supplied from the commercial power source 21 by the rectifier circuit 22. The flyback power source 23 steps down the rectified voltage to a voltage suitable for charging the battery 3, and charges the battery 3.

[0020] Furthermore, the lighting unit 2 uses a control power supply generating circuit 26 to generate Vcc 25 that serves as the power supply for the control circuit 27. The control circuit 27 is, for example, a microcomputer. The control circuit 27 controls the output of the flyback power supply 23 to control the charging current of the battery 3.

[0021] The control circuit 27 also has the function of receiving and operating an input from the inspection switch 10 and outputting the state of the lighting unit 2 to the monitor 11.

[0022] Next, the operation of the lighting unit 2 in an emergency will be described. When the commercial power source 21 fails, the control circuit 27 uses the boost circuit 28 to boost the output voltage of the battery 3. The boost circuit is an example of a lighting circuit that uses the output voltage of the battery 3 to light the light source 6.

[0023] The control circuit 27 also outputs a power ON / OFF signal 32 to turn a power ON / OFF switch 33 to the ON state. This allows power to be supplied from the battery 3 to the light source 6. The control circuit 27 also outputs a light source ON / OFF signal 37 to operate the light source ON / OFF switch 34. This allows the light source 6 to be controlled to be turned on and off.

[0024] When turning on the light source 6, first the control circuit 27 outputs a light source ON / OFF signal 37 to turn on the light source ON / OFF switch 34. Next, the boost circuit 28 detects the output voltage using a voltage detection unit 29. The boost circuit 28 further detects the current of the light source 6 using a current detection resistor 30 to obtain a current detection signal 31. Then, based on the output voltage and current detection signal 31 obtained from the boost circuit 28, the control circuit 27 controls the operation of the boost circuit 28 so that the current detection signal 31 is constant. This keeps the power supplied to the light source 6 at an appropriate level, stabilizing the emergency lighting of the light source 6.

[0025] Next, two operations of the lighting unit 2 during inspection will be described. First, an operation for performing inspection by detecting the voltage of the light source 6 will be described. First, the control circuit 27 turns off the power ON / OFF switch 33 and the light source ON / OFF switch 34. The control circuit 27 also makes the boost circuit 28 operate at a constant current.

[0026] Next, the control circuit 27 outputs a power ON / OFF signal 32 to turn on the power ON / OFF switch 33. This power ON / OFF signal supplies a very weak electric power that is not noticeable to humans. The human being is, for example, a circuit designer or an appliance designer.

[0027] Then, the voltage detection unit 36 ​​detects the connection state of the light source 6. Here, if there is no abnormality in the connection of the light source 6, "H" is detected, and if there is an abnormality, "L" is detected.

[0028] It should be noted that "if there is an abnormality" here does not only refer to the light source 6 being in a disconnected state, but also to an open failure of the LED chip 41 of the light source 6, a malfunction of the connector 42, a broken pattern on the substrate 43, or other abnormalities in all of the paths necessary for the normal operation of the light source 6.

[0029] A method for detecting the voltage of the light source 6 will be described in more detail. Detection resistors 35a and 35b are connected to the cathode side of the light source 6. The detection resistors 35a and 35b enable detection of the voltage of the light source 6 from the difference between the voltage output from the boost circuit 28 and the voltage of the voltage detection unit 36.

[0030] The voltage detection unit 36 ​​can detect the voltage more accurately by using an A / D port of the microcomputer of the control circuit 27.

[0031] Secondly, the operation of inspecting by detecting the voltages of the detection resistors 35a and 35b will be described. First, as in the first operation, the control circuit 27 turns off the power supply ON / OFF switch 33 and the light source ON / OFF switch 34. The control circuit 27 also makes the boost circuit 28 operate at a constant current.

[0032] Next, the control circuit 27 outputs a power ON / OFF signal 32 to turn on the power ON / OFF switch 33. This power ON / OFF signal supplies a very weak electric power that is not noticeable to humans. The human being is, for example, a circuit designer or an appliance designer.

[0033] Then, the voltage detection unit 36 ​​detects the voltages of the detection resistors 35a and 35b and compares them with a preset normal voltage. The normal voltage may be an actual measurement value or a value calculated by simulation or the like. This makes it possible to check whether at least one of the LED chips 41 in the light source 6 is short-circuited or whether the connector 42 is short-circuited due to tracking or the like on the board.

[0034] As described above, by implementing emergency lighting by supplying weak power, the light emitted by the light source 6 becomes dimmer than during emergency lighting, making it difficult for general users to recognize the emergency lighting. In other words, it is possible to detect the presence or absence of an abnormality in the light source due to causes other than the battery while suppressing the sense of discomfort felt by general users.

[0035] Embodiment 2 5 is a block diagram showing a circuit configuration of a lighting unit according to embodiment 2 of the present disclosure. A lighting unit 2a according to this embodiment differs from embodiment 1 in that a power ON / OFF signal 32a is a pulse signal.

[0036] The operation of the lighting unit 2a during inspection will be described. Here, the operation of performing inspection by detecting the voltage of the detection resistors 35a and 35b will be described. First, the control circuit 27 turns the power ON / OFF switch 33 and the light source ON / OFF switch 34 to the OFF state. The control circuit 27 also makes the boost circuit 28 operate at a constant current.

[0037] Next, the control circuit 27 outputs a power ON / OFF signal 32a to turn on the power ON / OFF switch 33. This power ON / OFF signal is a pulse signal of such a short duration that a human cannot recognize the light emitted from the light source. The human being may be, for example, a circuit designer or an appliance designer.

[0038] The voltages of the detection resistors 35a and 35b are detected by the voltage detection unit 36 ​​and compared with a preset normal voltage. The normal voltage may be an actual measurement value or a value calculated by simulation or the like. This makes it possible to check whether at least one of the LED chips 41 in the light source 6 is short-circuited or whether the connector 42 is short-circuited due to tracking or the like on the board.

[0039] Incidentally, the "very short time" referred to here is preferably shorter than 200 milliseconds, for example. This is because it is said that the time it takes for the human eye to react to light is 200 milliseconds or longer. However, in terms of the LED light-emitting principle, and taking into account the light-emitting period of the element itself and the afterglow caused by the phosphor, the time during which current is required is thought to be very short. For this reason, the current-flow time is set based on the electrical characteristics, light-emitting characteristics, lens shape, and module configuration of the LED. The final current-flow time is actually visually confirmed by, for example, a circuit designer or device designer.

[0040] In this embodiment, the inspection may be performed by detecting the voltage of the light source 6. In this case, the voltage detection unit 36 ​​detects the voltage using an A / D port which has high processing speed.

[0041] As described above, by implementing emergency lighting by supplying power for a very short period of time, general users will find it difficult to notice the emergency lighting. In other words, it is possible to detect the presence or absence of an abnormality in the light source due to causes other than the battery while suppressing any discomfort felt by general users.

[0042] Third embodiment This embodiment is a combination of embodiment 1 and embodiment 2. That is, in the lighting unit 2a, a power ON / OFF signal 32b, which is a weak and short-time power supply, is used to detect the voltages of the detection resistors 35a and 35b.

[0043] Table 1 shows the values ​​at which light can be visually observed when a single pulse current is supplied to a module consisting of four LED elements connected in series. It shows that the power ON / OFF signal 32, which is a weak and very short-lasting power, can be, for example, a power of 1.2 mA for a duration of 50 μs or less, or a current of 0.6 mA for a duration of 100 μs or less. The pulse current value and duration vary depending on the electrical characteristics and light emission characteristics of the LED elements, the lens shape, and the configuration of the module.

[0044] [Table 1]

[0045] The times in Table 1 are the duration of the pulse current. Since LED elements have afterglow characteristics, the actual light output duration will be longer than this time. Furthermore, since this afterglow characteristic also differs depending on the type of LED element, the duration of the pulse current, at which light cannot be observed by the human eye, must also be adjusted according to the type of LED element.

[0046] The light emission intensity of an LED element is determined by the current value and the light emission time. Therefore, as described above, by providing a weak and very short power supply for emergency lighting, general users will find it difficult to notice the emergency lighting. In other words, it is possible to detect the presence or absence of an abnormality in the light source caused by factors other than the battery while suppressing the discomfort felt by general users.

[0047] Fourth embodiment 6 is a block diagram showing a circuit configuration of a lighting unit according to embodiment 4 of the present disclosure. A lighting unit 2b according to this embodiment differs from embodiment 1 in that a light detection element 51 is used to detect light emitted from a light source 6.

[0048] The operation of the lighting unit 2b during inspection will be described below. First, the control circuit 27 turns off the power ON / OFF switch 33 and the light source ON / OFF switch 34. The control circuit 27 also causes the boost circuit 28 to operate at a constant current.

[0049] Next, the control circuit 27 outputs a power ON / OFF signal 32b to turn on the power ON / OFF switch 33. This power ON / OFF signal is a pulse signal of such a short duration that a human cannot recognize the light emitted from the light source. The human being may be, for example, a circuit designer or an appliance designer.

[0050] The light detection element 51 quantitatively detects the output state of the light emitted by the light source 6 and outputs it to the control circuit 27 as a light detection signal 52. The light detection element 51 is an element disposed near the light source 6, and is a so-called brightness sensor such as a photodiode or a phototransistor. The light detection element 51 in Fig. 6 is a combination of a photodiode and a current amplifier. It is preferable that the light detection element 51 be an element capable of high-speed response.

[0051] Furthermore, the light detection signal 52 is compared with a preset normal light emission output state. The normal output state may be an actual measurement value or a value calculated by simulation or the like. This makes it possible to check whether at least one of the LED chips 41 in the light source 6 is short-circuited or whether the connector 42 is short-circuited due to tracking or the like on the board.

[0052] In this embodiment, the output state of the light emitted by the light source 6 is detected by the photodetector element 51. The photodetector element 51 is capable of detecting even a very small amount of light, and therefore has the advantage that it is not necessary to visually set the magnitude and time of the detection current.

[0053] As described above, by using a photodetector element to detect emergency lighting caused by a very short-term power supply, general users are less likely to notice the emergency lighting. In other words, it is possible to detect the presence or absence of an abnormality in the light source caused by factors other than the battery while suppressing the sense of discomfort felt by general users.

[0054] In the present embodiment, a method for detecting the presence or absence of an abnormality in the light source based on the light emitted by a very short-term power supply has been described, but the presence or absence of an abnormality in the light source may be detected based on the light emitted by a power supply that is dimmer than that during emergency lighting. Alternatively, the presence or absence of an abnormality in the light source may be detected based on the light emitted by a weak and very short-term power supply.

[0055] Fifth embodiment 7 is a block diagram showing a circuit configuration of a lighting unit according to embodiment 5 of the present disclosure. A lighting unit 2c according to this embodiment differs from embodiment 1 in that a control circuit has a boosting function of a boost circuit built therein.

[0056] The lighting unit 2c includes a control circuit 27a. The control circuit 27a is a circuit that incorporates the function of driving the boost circuit 28 in addition to the function of the control circuit 27. This allows the current detection resistor 30 to serve as a detection terminal for the LED voltage, thereby simplifying the circuit.

[0057] Sixth embodiment In this embodiment, the configuration of the lighting unit and the like is the same as in embodiment 1. However, this embodiment differs from embodiment 1 in that the power supplied during inspection is set to a current value and light emission time such that the light emission of the light source 6 is not noticeable in a bright environment.

[0058] In the first to fifth embodiments, the objective is for humans not to perceive the light emission in a dark environment where the illuminance is zero. However, in reality, if humans do not perceive the light emission in an environment where general users enter, they will not feel uncomfortable. Here, the illuminance in an environment where general users enter is never zero. Therefore, the power at which humans do not actually perceive the light emission can be achieved even with a larger current value or a long light emission time.

[0059] As described above, the power that humans cannot recognize the light emitted from the light source 6 may be a power that emits light lower than the illuminance of the surrounding environment. Therefore, the current value and light emission time of the power supplied in this embodiment are determined based on the environment in which the disaster prevention lighting device is installed, the type of lighting fixture, and the characteristics of the LED elements.

[0060] As described above, since the light emitted by the supply is lower than the illuminance of the surrounding environment, emergency lighting is performed by supplying a weak power that is so weak that humans cannot perceive the light, making it difficult for general users to perceive the emergency lighting. In other words, it is possible to detect the presence or absence of an abnormality in the light source due to causes other than the battery while suppressing the discomfort felt by general users.

[0061] Furthermore, this embodiment eliminates the need to set the magnitude and time of the detection current with visual confirmation, thereby reducing the burden on circuit designers or device designers.

[0062] Seventh embodiment In this embodiment, the configuration of the lighting unit and the like is similar to that of embodiment 1. However, this embodiment differs from embodiment 1 in that when an abnormality in the light source is detected, the abnormality is made known.

[0063] When an abnormality in a light source is detected, it is necessary to notify the inspection result to an inspector or manager as soon as possible so that the light source can be restored to a normal state. Therefore, if it is possible to turn on the light source, the abnormality is notified by changing the lighting state of the light source. For example, the light source is turned on continuously or blinks to make the light emission recognized and to notify the abnormality.

[0064] If it is not possible to light the light source, the abnormality is notified by changing the display on the monitor 11. If it is not possible to light the light source, for example, an abnormality caused by an open circuit may occur.

[0065] The abnormality detection of the light source shown in the present disclosure may be performed one-off or continuously. The abnormality detection of the light source shown in the present disclosure may be performed independently of the battery inspection as disclosed in Patent Document 1, or may be performed in parallel with the battery inspection when an inspection signal indicating that the battery inspection should be performed is received. When an abnormality of the light source is detected in parallel, the abnormality can be notified by, for example, changing the display of the monitor 11, so that the battery inspection and the result of the abnormality detection of the light source can be confirmed at the same time.

[0066] Furthermore, the abnormality detection of the light source shown in the present disclosure may be applied to other than emergency lights that are not normally turned on. For example, it may be applied to emergency light sources that are always turned off, or to the flashing light sources of flashing emergency lights. In the case of emergency light sources or flashing emergency lights, the abnormality of the light source may be notified by turning on the light source using a normal lighting circuit, for example.

[0067] Below, aspects of the present disclosure are summarized as appendices.

[0068] (Appendix 1) The device includes a battery, a lighting circuit, a control circuit, and a light source. the lighting circuit lights up the light source using an output current of the battery; The control circuit controls the output current to supply power such that the light emitted by the supply is dimmer than that during emergency lighting, Detecting whether the light source is abnormal based on the light emitted by the power. Disaster prevention lighting equipment. (Appendix 2) The power is so weak that humans cannot recognize the light emitted by the power. 2. A disaster prevention lighting device as described in appendix 1. (Appendix 3) The power is so weak that the light emitted by the power supply is lower than the illuminance of the surrounding environment and cannot be recognized by humans. 3. A disaster prevention lighting device according to claim 1 or 2. (Appendix 4) The device includes a battery, a lighting circuit, a control circuit, and a light source. the lighting circuit lights up the light source using an output current of the battery; The control circuit controls the output current to supply power for such a short period of time that a human cannot recognize the light emitted by the supply of power, Detecting whether the light source is abnormal based on the light emitted by the power. Disaster prevention lighting equipment. (Appendix 5) The time for which the power is supplied is less than 200 milliseconds each time. 5. A disaster prevention lighting device as described in appendix 4. (Appendix 6) Further comprising a voltage detection unit, The detection is performed by the voltage detection unit detecting the voltage of the light source. 6. A disaster prevention lighting device according to any one of claims 1 to 5. (Appendix 7) Further comprising a voltage detection unit and a detection resistor, The detection is performed by comparing a voltage across the detection resistor in a preset normal state with the voltage across the detection resistor detected by the voltage detection unit. 6. A disaster prevention lighting device according to any one of claims 1 to 5. (Appendix 8) Further comprising a light detection element, The detection is performed by comparing the emission of the light source during a preset normal state with the emission of the light source detected by the light detection element. 6. A disaster prevention lighting device according to any one of claims 1 to 5. (Appendix 9) The control circuit includes the lighting circuit. A disaster prevention lighting device according to any one of appendix 1 to 8. (Appendix 10) The lighting state of the light source is changed based on the result of the detection. A disaster prevention lighting device according to any one of appendix 1 to 9. (Appendix 11) Further comprising a monitor; Changing the display of the monitor based on the result of the detection. A disaster prevention lighting device according to any one of appendix 1 to 9. [Explanation of symbols]

[0069] 1 Disaster prevention lighting equipment 3 batteries 6 light source 11 Monitor 27 Control circuit 27a Control circuit 35a Detect resistor 35b Detector resistor 36 Voltage detection section 51 Photodetector

Claims

1. The device includes a battery, a lighting circuit, a control circuit, and a light source. the lighting circuit lights up the light source using an output current of the battery; The control circuit controls the output current to supply power such that the light emitted by the supply is dimmer than that during emergency lighting, Detecting whether the light source is abnormal based on the light emitted by the power. Disaster prevention lighting equipment.

2. The power is so weak that humans cannot recognize the light emitted by the power. The disaster prevention lighting device according to claim 1.

3. The power is so weak that the light emitted by the power supply is lower than the illuminance of the surrounding environment and cannot be recognized by humans. The disaster prevention lighting device according to claim 1.

4. The device includes a battery, a lighting circuit, a control circuit, and a light source. the lighting circuit lights up the light source using an output current of the battery; The control circuit controls the output current to supply power for such a short period of time that a human cannot recognize the light emitted by the supply of power, Detecting whether the light source is abnormal based on the light emitted by the power. Disaster prevention lighting equipment.

5. The time for which the power is supplied is less than 200 milliseconds. The disaster prevention lighting device according to claim 4.

6. A voltage detection unit is further provided, The detection is performed by the voltage detection unit detecting the voltage of the light source.

5. The disaster prevention lighting device according to claim 1 or 4.

7. Further comprising a voltage detection unit and a detection resistor, The detection is performed by comparing a voltage across the detection resistor in a preset normal state with the voltage across the detection resistor detected by the voltage detection unit.

5. The disaster prevention lighting device according to claim 1 or 4.

8. Further comprising a light detection element, The detection is performed by comparing the emission of the light source during a preset normal state with the emission of the light source detected by the light detection element.

5. The disaster prevention lighting device according to claim 1 or 4.

9. The control circuit includes the lighting circuit.

5. The disaster prevention lighting device according to claim 1 or 4.

10. The lighting state of the light source is changed based on the result of the detection.

5. The disaster prevention lighting device according to claim 1 or 4.

11. Further comprising a monitor; Changing the display of the monitor based on the result of the detection.

5. The disaster prevention lighting device according to claim 1 or 4.

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