Lighting device, disaster prevention lighting fixture and disaster prevention lighting system

Abstract

To notify the inspection timing of an emergency power supply.SOLUTION: A lighting device 4 comprises a lighting circuit 41, a power supply timer 421, and a notification unit (notification circuit 43). The lighting circuit 41 turns on a light source 2 with power supplied from an emergency power supply (battery 3) when an external power supply 9 is interrupted. The emergency power supply is charged by the power supplied from the external power supply 9. The power supply timer 421 measures the usage period of the emergency power supply. The notification unit performs notification using at least one of light, sound, and an identifier when the usage period measured by the power supply timer 421 reaches a notification period. The notification period is the period before the inspection timing of the emergency power supply. Even if the inspection of discharging the emergency power supply is performed before the usage period reaches the notification period, the power supply timer 421 continues measurement of the usage period.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure generally relates to a lighting device, a disaster prevention lighting device, and a disaster prevention lighting system, and more specifically, to a lighting device that turns on a light source in an emergency, a disaster prevention lighting device including the lighting device, and a disaster prevention lighting system including a plurality of disaster prevention lighting devices. [Background technology]

[0002] As an example of a conventional disaster prevention lighting device, an emergency lighting device described in Patent Document 1 is exemplified.

[0003] The emergency lighting device described in Patent Document 1 includes an emergency lamp, a rechargeable emergency power supply that supplies power to the emergency lamp in an emergency, an inspection unit, and a wireless communication module.

[0004] The inspection unit performs a predetermined inspection of the emergency power supply at a fixed inspection cycle, and the wireless communication module transmits the inspection results by the inspection unit. The inspection unit performs the inspection to determine whether there is an abnormality in the emergency power supply for a predetermined time specified by law. The inspection unit also sets the inspection cycle to a predetermined period specified by law, and performs the current inspection when the predetermined period has elapsed since the previous inspection. In other words, the inspection unit performs the inspection periodically in accordance with the predetermined period specified by law, and for the predetermined time specified by law. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-55796 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, the inspection requirements for built-in emergency power sources for emergency exit lights included in disaster prevention lighting fixtures (see Japan Industrial Standards C 8105-2-22: 2014 22.3.22A) have been relaxed. In other words, if the emergency power source is a nickel-cadmium battery, inspection is not required in principle until three years have passed since the year of manufacture. Also, if the emergency power source is a nickel-metal hydride battery, inspection is not required in principle until five years have passed since the year of manufacture (see Fire Prevention Bureau No. 80 "Partial Revision of Test Standards and Inspection Procedures for Fire Prevention Equipment, etc. (Notice)").

[0007] However, as the requirements for inspection of built-in emergency power sources have been relaxed, there is a risk that inspections may be overlooked when they should be performed.

[0008] An object of the present disclosure is to provide a lighting device, a disaster prevention lighting fixture, and a disaster prevention lighting system that can notify the time for inspection of an emergency power supply. [Means for solving the problem]

[0009] A lighting device according to an aspect of the present disclosure includes a lighting circuit, a power supply timer, and an alarm unit. The lighting circuit lights a light source with power supplied from an emergency power supply when an external power supply is stopped. The emergency power supply is charged with power supplied from the external power supply. The power supply timer measures a usage period of the emergency power supply. The alarm unit has an alarm function. When the usage period measured by the power supply timer reaches an alarm period, which is a period before the inspection time of the emergency power supply, the alarm unit issues an alarm with at least one of light, sound, and an identifier. The power supply timer continues to measure the usage period even if an inspection is performed to discharge the emergency power supply before the usage period reaches the alarm period.

[0010] A disaster prevention lighting device according to an aspect of the present disclosure includes the lighting device, a light source, the emergency power supply, and a main body. The light source is turned on by power from the lighting device. The lighting device, the light source, and the emergency power supply are attached to the main body.

[0011] A disaster prevention lighting system according to one aspect of the present disclosure includes the plurality of disaster prevention lighting devices. Effect of the Invention

[0012] According to the lighting device, disaster prevention lighting fixture, and disaster prevention lighting system according to the above aspects of the present disclosure, it is possible to notify the time for inspection of the emergency power supply. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a block diagram of a disaster prevention lighting device according to an embodiment. [Diagram 2] FIG. 2 is a time chart showing the operation of the disaster prevention lighting device. [Diagram 3] Fig. 3A is a top view of the above disaster prevention lighting device, Fig. 3B is a bottom view of the above disaster prevention lighting device, and Fig. 3C is a side view of the above disaster prevention lighting device. [Figure 4] FIG. 4 is a block diagram of a disaster prevention lighting system according to an embodiment. [Diagram 5] FIG. 5 is a block diagram of a disaster prevention lighting system according to a twelfth modification of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The lighting device, the disaster prevention lighting device, and the disaster prevention lighting system according to the embodiment will be described below with reference to the drawings. Each figure described in the following embodiment is a schematic diagram, and the size and thickness ratio of each component in the figure do not necessarily reflect the actual dimensional ratio. Note that the configuration described in the following embodiment is merely an example of the present disclosure. The present disclosure is not limited to the following embodiment, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

[0015] (1) Overall configuration of disaster prevention lighting equipment A disaster prevention lighting device 1 according to the embodiment includes a light source 2, a battery 3 (emergency power source), and a lighting device 4, as shown in FIG.

[0016] The disaster prevention lighting device 1 is a recessed type emergency light that is recessed into a recessed hole provided in the ceiling of a building. However, the disaster prevention lighting device is not limited to a recessed type emergency light. The disaster prevention lighting device may be an exposed type emergency light that is directly attached to the ceiling, or a disaster prevention lighting device other than an emergency light such as an emergency exit light.

[0017] (2) Components of disaster prevention lighting equipment Hereinafter, each component of the disaster prevention lighting device 1 according to this embodiment will be described with reference to the drawings.

[0018] (2.1) Light source The light source 2 is turned on by power from the lighting device 4. The light source 2 has a plurality of solid-state light-emitting elements. For example, the light source 2 has an LED array in which a plurality of LEDs (Light Emitting Diodes) are connected in series as the plurality of solid-state light-emitting elements. Note that the light source 2 is not limited to a configuration having LEDs as the solid-state light-emitting elements. The light source 2 may have other solid-state light-emitting elements, such as organic electroluminescence (OEL) or semiconductor laser diodes (Laser Diodes: LD).

[0019] (2.2)Battery The battery 3 is a rechargeable storage battery (secondary battery) and corresponds to an emergency power source. The battery 3 is not limited to a specific type of secondary battery, but it is preferable that the battery 3 is, for example, a nickel-metal hydride battery or a nickel-cadmium battery. The battery 3 can output emergency power by discharging the stored charge. In other words, the power supplied from the battery 3 is emergency power.

[0020] (2.3) Lighting device The lighting device 4 includes a charging circuit 40, a lighting circuit 41, a control circuit 42, and an alarm circuit 43 (alarm unit). The lighting device 4 preferably further includes a DC power supply circuit 45, a power outage detection circuit 46, a receiving unit 47, a monitor lamp 48, and a push button switch 49. The lighting device 4 includes three push button switches 49. When distinguishing between the three push button switches 49, they are referred to as push button switches 49A, 49B, and 49C, respectively.

[0021] The DC power supply circuit 45 is preferably configured, for example, by a self-excited switching power supply circuit such as a ringing choke converter, and converts the AC voltage supplied from an external power supply (for example, a commercial power system) 9 into a DC voltage lower than the effective value of the AC voltage. The charging circuit 40 is preferably configured to operate when power is supplied from the external power supply 9, and to pass a charging current from the DC power supply circuit 45 to the battery 3. The power failure detection circuit 46 is configured to detect a power failure of the external power supply 9 from the output voltage of the DC power supply circuit 45 and notify the control circuit 42.

[0022] The monitor lamp 48 is composed of, for example, a light emitting diode that emits green light, and emits light when a charging current is supplied to the battery 3 from the charging circuit 40. The receiver 47 is configured to receive a wireless signal that uses infrared rays as a communication medium, demodulate a transmission frame from the received wireless signal, and pass it to the control circuit 42. This wireless signal is transmitted from a wireless transmitter operated by an inspector or the like performing the inspection.

[0023] The inspection is carried out at legally specified intervals, and aims to discharge the battery 3 for a specified period of time or more, and to check the degree of deterioration of the battery 3. Furthermore, it is preferable that the inspection has an additional purpose of forcibly operating the lighting circuit 41 to check that the light source 2 maintains a lit state for a specified period of time or more.

[0024] (2.4) Lighting circuit The lighting circuit 41 lights up the light source 2 with power supplied from the battery 3 when the external power source 9 is stopped. More specifically, the lighting circuit 41 is configured to convert the direct current supplied from the battery 3 into a constant current and supply it to the light source 2.

[0025] (2.5) Control circuit The control circuit 42 operates by being supplied with power from an external power source 9 or a battery 3. The control circuit 42 is preferably configured as a computer system. The computer system is mainly configured with a processor and a memory as hardware. The function of the control circuit 42 in the present disclosure is realized by the processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system. It may be provided through an electric communication line, or may be provided by being recorded in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is configured with one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits such as IC or LSI referred to here are called by different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a logic device that can reconfigure the connection relationship inside the LSI or the circuit partition inside the LSI, can also be adopted as a processor. The electronic circuits may be integrated in one chip or distributed among multiple chips. The chips may be integrated in one device or distributed among multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Thus, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0026] The control circuit 42 is configured to operate the charging circuit 40 and stop the lighting circuit 41 when the power failure detection circuit 46 does not detect a power failure. Also, the control circuit 42 is configured to stop the charging circuit 40 and operate the lighting circuit 41 when the power failure detection circuit 46 detects a power failure. Furthermore, when the push button switch 49A is pressed, the control circuit 42 determines that an inspection instruction has been received from an inspector or the like, stops the charging circuit 40, operates the lighting circuit 41 to discharge the battery 3, and operates the charging circuit 40. Similarly, when the control circuit 42 receives a transmission frame from the receiving unit 47, it determines that an inspection instruction has been received from an inspector or the like, stops the charging circuit 40, operates the lighting circuit 41 to discharge the battery 3, and operates the charging circuit 40. However, it is preferable that the control circuit 42 is configured such that, when the push button switch 49B is pressed, the control circuit 42 operates the lighting circuit 41 for several seconds, and then stops the lighting circuit 41 again and operates the charging circuit 40.

[0027] The disaster prevention lighting equipment 1 is an emergency lighting equipment or the like. Emergency lighting equipment and emergency lighting equipment must be inspected based on laws and regulations. The inspection period for emergency lighting equipment is stipulated in the Fire Service Act, and the inspection period for emergency lighting equipment is stipulated in the Building Standards Act.

[0028] Furthermore, if the storage battery installed in the emergency exit light has not exceeded a certain number of years since its manufacture, the above-mentioned inspection of the emergency exit light may not be required, taking into account the lifespan of the storage battery. In this case, if the storage battery installed in the emergency exit light has exceeded a certain number of years since its manufacture, the above-mentioned inspection of the emergency exit light must be carried out, taking into account the lifespan of the storage battery. For example, if the storage battery is a nickel-cadmium battery, inspection must be carried out if it has been more than three years since its manufacture. Also, if the storage battery is a nickel-metal hydride battery, inspection must be carried out if it has been more than five years since its manufacture.

[0029] However, in reality, it is difficult to say that inspections are being carried out at appropriate times (for example, at times stipulated by laws and regulations). Therefore, the disaster prevention lighting device 1 according to this embodiment has the following notification function in order to carry out inspections at appropriate times taking into account the lifespan of the storage battery.

[0030] First, as a premise, in the disaster prevention lighting device 1 according to this embodiment, if the usage period of the battery 3 does not exceed a predetermined time, there is no need to carry out an inspection of the disaster prevention lighting device 1. Therefore, the control circuit 42 controls the notification circuit 43 to issue a notification after the usage period of the battery 3 reaches the predetermined time.

[0031] The control circuit 42 is configured to have the functions of a power timer 421 and a check timer 422. When the control circuit 42 has a real time clock (RTC), the power timer 421 and the check timer 422 periodically read the value of the real time clock and accumulate the count value to measure the elapsed time. Alternatively, the power timer 421 and the check timer 422 may be counters that perform a time measurement operation by incrementing the count value at a fixed period (for example, the period of the clock frequency).

[0032] The power supply timer 421 measures the usage period Ta of the battery 3. In this embodiment, the usage period Ta is the elapsed time from the time when charging of the battery 3 is started by the charging circuit 40. The starting point of the usage period Ta is, for example, the time when charging of a new battery 3 is started. However, the starting point of the usage period Ta may be the time when the new battery 3 is fully charged by the charging circuit 40. Then, when the power supply timer 421 starts to measure the usage period Ta, the measured value of the usage period Ta increases from zero as time passes. In addition, when the battery 3 is replaced with a new battery 3, the power supply timer 421 is reset, and the measured value becomes zero. In this embodiment, a person presses the push button switches 49A and 49B simultaneously after replacing the battery 3. When the push button switches 49A and 49B are pressed simultaneously, the control circuit 42 resets the power supply timer 421. After the power supply timer 421 is reset, the measured value increases again from zero.

[0033] Alternatively, when the control circuit 42 operates only with emergency power, the control circuit 42 may detect the execution of the battery 3 replacement work based on the presence or absence of emergency power supply. For example, the control circuit 42 stores time information immediately before the operation of the control circuit 42 is stopped based on the value of the real-time clock immediately before the voltage of the transmission path of the emergency power falls below the operating voltage of the control circuit 42. Then, immediately after the voltage of the transmission path of the emergency power exceeds the operating voltage of the control circuit 42 and the operation of the control circuit 42 is resumed, the control circuit 42 acquires time information immediately after the restart based on the value of the real-time clock. The control circuit 42 calculates the stop time during which the operation was stopped from the difference between the time information immediately before the stop and the time information immediately after the restart, and if the stop time is equal to or longer than a certain time, detects the execution of the battery 3 replacement work and resets the power supply timer 421.

[0034] The inspection timer 422 measures the period from the completion of the inspection to discharge the battery 3 as the uninspected period Tb. More specifically, the inspection timer 422 measures the uninspected period Tb in order to determine the timing to perform an inspection again on the same battery 3 after the inspection is performed. When the inspection timer 422 starts measuring the uninspected period Tb, the measured value of the uninspected period Tb increases from zero as time passes. In addition, the inspection timer 422 is reset when the inspection is performed, and the measured value becomes zero. Similarly, the inspection timer 422 is reset when the battery 3 is replaced, and the measured value becomes zero. In this embodiment, a person simultaneously presses the push button switches 49A and 49C after the inspection and after the replacement of the battery 3. When the push button switches 49A and 49C are simultaneously pressed, the control circuit 42 resets the inspection timer 422. Alternatively, when the control circuit 42 performs an inspection, the control circuit 42 may reset the power supply timer 421. After being reset, the timer starts increasing again from zero.

[0035] The control circuit 42 has the function of a power supply timer 421 and the function of a check timer 422 , and also has a notification control circuit 423 that controls the notification of the notification circuit 43 .

[0036] The notification control circuit 423 performs a first notification control process to cause the notification circuit 43 to perform a first notification using the time value of the power supply timer 421. The notification control circuit 423 prestores data of the first notification period [Tc], and performs a comparison process between the usage period Ta and the first notification period [Tc]. Then, when the usage period Ta reaches the first notification period [Tc], the notification control circuit 423 controls the notification circuit 43 to perform the first notification.

[0037] In this specification, the first notification refers to a notification that is made when the usage period Ta measured by the power supply timer 421 reaches the first notification time [Tc]. The first notification period [Tc] is an inspection period stipulated by law, and is, for example, a period equivalent to 3 or 5 years.

[0038] The notification control circuit 423 also performs a second notification control process to cause the notification circuit 43 to perform a second notification using the time value of the inspection timer 422. The notification control circuit 423 prestores data on the second notification period [Td], and performs a comparison process between the uninspected period Tb and the second notification period [Td]. When the uninspected period Tb reaches the second notification period [Td], the notification control circuit 423 controls the notification circuit 43 to perform the second notification.

[0039] The second notification in this specification refers to a notification that is made when the uninspected period Tb measured by the inspection timer 422 reaches the second notification period [Td]. The second notification period [Td] is an inspection period stipulated by law, and is an arbitrary period of, for example, 6 months or less or 12 months or less.

[0040] (2.6) Notification Circuit The notification circuit 43 has a first function of making a first notification and a second function of making a second notification. The notification circuit 43 makes the first notification and the second notification according to the control of the notification control circuit 423 of the control circuit 42. More specifically, as the first function, the notification circuit 43 makes the first notification by light when the usage period Ta timed by the power supply timer 421 reaches the first notification period [Tc]. In addition, the notification circuit 43 makes the second notification by light when the uninspected period Tb timed by the inspection timer 422 reaches the second notification period [Td].

[0041] The notification circuit 43 is a notification section having a notification function, and includes, for example, a display element 431 different from the light source 2, and a drive circuit 432 that drives the display element 431 to emit light. The display element 431 is, for example, a light-emitting diode that emits green light or a light-emitting diode that emits red light. The notification circuit 43 performs the first and second notifications with light using the display element 431. For example, the notification circuit 43 may perform the first and second notifications by blinking the display element 431, or may perform the first and second notifications by lighting up the display element 431.

[0042] Incidentally, the power supply timer 421 continues timing the usage period Ta even if the battery 3 is inspected before the usage period Ta reaches the first notification period [Tc]. In other words, the power supply timer 421 continues timing the usage period Ta before the usage period Ta reaches the first notification period [Tc], regardless of whether the battery 3 is inspected or not.

[0043] On the other hand, if the battery 3 is inspected before the uninspection period Tb reaches the second notification period [Td], the inspection timer 422 resets the time value of the uninspection period Tb. In other words, if the battery 3 is not inspected before the uninspection period Tb reaches the second notification period [Td], the inspection timer 422 continues to measure the time of the uninspection period Tb, but if the battery 3 is inspected, the inspection timer 422 resets the time value of the uninspection period Tb.

[0044] (3) Operation of emergency lighting equipment Hereinafter, the operation of the disaster prevention lighting device 1 according to this embodiment will be described with reference to FIG.

[0045] First, in the lighting device 4, when the control circuit 42 starts supplying emergency power, it determines that charging of the battery 3 has started and starts measuring the usage period Ta by the power supply timer 421 (time t0). When the power supply timer 421 starts measuring the usage period Ta, the measured value of the usage period Ta increases from zero as time passes.

[0046] Thereafter, when the usage period Ta reaches the first notification period [Tc] (time t1), the notification circuit 43 performs the first notification N1. When the first notification N1 is performed, the inspector performs the inspection E1 of the battery 3 (time t2). When the inspection E1 is completed, the inspection timer 422 starts timing the uninspected period Tb (time t3). When the uninspected period Tb reaches the second notification period [Td] (time t4), the notification circuit 43 performs the second notification N2. When the second notification N2 is performed, the inspector performs the inspection E2 (time t5). When the inspection E2 is completed, the inspection timer 422 is reset, and the inspection timer 422 starts timing the uninspected period Tb (time t6). Then, unless the battery 3 replacement process is performed, the uninspected period Tb reaches the second notification period [Td] again, and the notification circuit 43 performs the second notification N2. When the second notification N2 is issued, the inspector performs the inspection E2. When the inspection E2 is completed, the inspection timer 422 is reset, and the inspection timer 422 starts measuring the non-inspection period Tb.

[0047] On the other hand, if the replacement process C1 for replacing the battery 3 is executed before the uninspected period Tb reaches the second notification period [Td], the power supply timer 421 and the inspection timer 422 are reset (time t7). When the replacement process C1 is completed, the power supply timer 421 starts counting the usage period Ta (time t8). Thereafter, the same operations as those described above are repeated.

[0048] That is, even if an inspector does not inspect the battery 3, the lighting device 4 performs the first notification N1 after the usage period Ta of the battery 3 reaches the first notification period [Tc] (for example, 3 or 5 years as determined by laws and regulations). Therefore, the lighting device 4 performs the first notification N1 at an appropriate time taking into account the life of the battery 3, etc.

[0049] Furthermore, the lighting device 4 periodically issues the second notification N2 until the battery 3 is replaced. At this time, the second notification period [Td] is shorter than the first notification period [Tc] from when the measurement of the usage period Ta starts until the first notification N1 is issued. If the battery 3 is not replaced after the first inspection, the lighting device 4 issues the second notification N2. Therefore, the lighting device 4 can urge the user to inspect the battery 3 at an appropriate time, taking into consideration the life of the battery 3, etc. Note that the control circuit 42 preferably obtains the current time from a real-time clock and executes the notification operation during a time period during which notification is possible (for example, a time period during which people are present in the building in which the disaster prevention lighting device 1 is installed) according to a predetermined schedule.

[0050] (4) Structure of disaster prevention lighting equipment 3A to 3C, the structure of the disaster prevention lighting device 1 equipped with the lighting device 4 will be described below. The disaster prevention lighting device 1 according to this embodiment is attached to a construction material such as a ceiling material or a wall material, and irradiates illumination light onto an evacuation passage or the like during a power outage.

[0051] The disaster prevention lighting device 1 includes a main body 10, a cover 11, and a pair of supports 12, as shown in FIGS. 3A to 3C.

[0052] 3A and 3B, the main body 10 is formed in a cylindrical shape with one bottom surface (lower surface) open. A pair of supports 12 are attached to the side surfaces of the main body 10. An annular flange 100 that protrudes outward is formed at the lower end of the main body 10.

[0053] The pair of supports 12 are formed in the shape of long leaf springs, as shown in Figures 3A to 3C. One end of each support 12 in the longitudinal direction is fixed to a side surface of the main body 10, and the other end in the longitudinal direction is configured to be flexible (upward) in a direction approaching the bottom surface (top surface) of the main body 10. In other words, the main body 10 is supported by the ceiling material such that the ceiling material is sandwiched between the pair of supports 12 inserted into embedding holes provided in the ceiling and a flange 100 provided on the lower end surface of the main body 10.

[0054] As shown in Figs. 3A to 3C, the cover 11 is formed in a disk shape larger than the outer diameter of the flange 100 of the main body 10. As shown in Fig. 3B, a circular window hole 110 is provided in the center of the cover 11. The lens 21 of the light source unit 2U passes through the window hole 110. A pair of mounting springs are attached to the cover 11. As shown in Fig. 3C, the cover 11 is held to the main body 10 by the pair of mounting springs in a state in which the cover 11 closes the bottom surface of the main body 10.

[0055] The lighting device 4 (see FIG. 1), the light source 2 (see FIG. 1), and the battery 3 (see FIG. 1) are attached to the main body 10. More specifically, as shown in FIG. 3B, the light source unit 2U, the battery unit 3U, and the lighting unit 4U are housed within the main body 10. However, the battery unit 3U is housed within the main body 10 so as to be insertable and removable through an opening on the bottom surface of the main body 10.

[0056] 3B, the light source unit 2U includes an LED module 20 and a lens 21. The LED module 20 has a substrate on which the light source 2 is mounted, and emits white illumination light such as white, neutral white, or daylight color when a voltage is applied in the forward direction. The lens 21 is disposed in front of (below) the LED module 20, and collects the light emitted from the LED module 20.

[0057] The battery unit 3U shown in Fig. 3B has a battery 3 (see Fig. 1) including multiple cells, and a battery case that houses the battery 3. The battery 3 is, for example, a nickel-metal hydride battery or a nickel-cadmium battery. The battery case is made of an electrically insulating material such as synthetic resin in a box shape and houses the multiple cells inside.

[0058] The lighting unit 4U shown in FIG. 3B has a lighting device 4 (see FIG. 1). Light emitted from a monitor lamp 48 of the lighting device 4 is emitted forward (downward) of the cover 11 through a first hole 111 provided in the cover 11. The receiver 47 receives (receives) a wireless signal through a second hole 112 provided in the cover 11. Light emitted from a display element 431 of the notification circuit 43 is emitted forward (downward) of the cover 11 through a third hole 114 provided in the cover 11. The push buttons of the three push button switches 49A, 49B, 49C are arranged to face the three operation holes 113 provided in the cover 11, one by one.

[0059] (5) Emergency lighting system The disaster prevention lighting fixture 1 according to this embodiment is used in a disaster prevention lighting system B1 as shown in Fig. 4. The disaster prevention lighting system B1 includes a plurality of (four in the illustrated example) disaster prevention lighting fixtures 1. In each disaster prevention lighting fixture 1, a lighting device 4 performs a first notification and a second notification.

[0060] (6) Variations As a first modification of the present embodiment, the lighting device 4 may include an alarm unit that performs the first and second alarms by sound. The alarm unit includes, for example, a sound generator such as a piezoelectric sounder, and a sound driver circuit that drives the sound generator to generate an alarm sound or an alarm message.

[0061] The alarm unit performs the first and second alarms by outputting an alarm sound from the sound generating unit. The alarm sound may be a buzzer sound, such as "Please perform an inspection." When an inspector hears the alarm sound, he or she can operate the wireless transmitter or the push button switch 49A to perform an inspection. Note that the alarm unit may output the alarm sound continuously or intermittently when performing the first and second alarms.

[0062] Furthermore, the notification unit of the lighting device 4 may perform the first notification by light and the second notification by sound, or may perform the first notification by sound and the second notification by light. In short, it is sufficient for the notification unit of the lighting device 4 to have a first function of performing the first notification by at least one of light and sound, and a second function of performing the second notification by at least one of light and sound.

[0063] Alternatively, the lighting device 4 may include a notification unit that performs the first and second notifications using an identifier. The identifier refers to, for example, characters such as "Time for inspection", symbols such as "o" or "x", patterns, or combinations of characters, symbols, or patterns.

[0064] The notification unit may include a light source provided inside the main body 10, and may emit light from the light source toward a symbol-shaped through-hole provided in the main body 10 or the cover 11. In other words, it is preferable that the identifier is formed on the cover 11 as a watermark.

[0065] Alternatively, the notification unit may have a display unit such as a liquid crystal display. The display unit is provided, for example, on the main body 10, and displays text such as "Time for inspection" or symbols such as "◯" or "X."

[0066] Furthermore, the notification unit of lighting device 4 may perform the first notification by light or sound and the second notification by an identifier, or may perform the first notification by an identifier and the second notification by light or sound. In short, it is sufficient for the notification unit of lighting device 4 to have a first function of performing the first notification by at least one of light, sound, and an identifier, and a second function of performing the second notification by at least one of light, sound, and an identifier.

[0067] As a second modification of this embodiment, the usage period Ta of the battery 3 as an emergency power source may be the time elapsed from the time of manufacture of the battery 3 instead of the time elapsed from the time when charging of the battery 3 was started. In this case, when the battery 3 is manufactured, a recording medium such as an ID chip or an IC tag that stores battery information including the manufacturing date or the time elapsed from the manufacturing date is attached to the battery 3. When an electrical connection is made with the battery 3, the control circuit 42 reads the battery information from the recording medium and sets an initial value for the usage period. Note that the information indicating the time of manufacture of the battery 3 may be the manufacturing date of the battery 3, the manufacturing date of the battery 3, or the manufacturing year of the battery 3.

[0068] As a third modification of this embodiment, the usage period Ta of the battery 3 as an emergency power source may be the time elapsed from mounting the battery 3 instead of the time elapsed from the time charging of the battery 3 started. In other words, the usage period Ta may be the time elapsed from mounting the battery 3. In this case, a detection element is provided that detects the connection between a connection terminal connected to the wiring from the battery 3 and a connection terminal connected to the wiring on the lighting circuit 41 side. The start of the usage period is determined to be when the detection element detects that the above two connection terminals are connected.

[0069] As a fourth variant of this embodiment, the usage period Ta of the battery 3 as an emergency power source may be the elapsed time from a timing obtained based on at least two of the following: the time when charging of the battery 3 begins, the time when the battery 3 is manufactured, and the time when the battery 3 is installed.

[0070] As a fifth modification of the present embodiment, the notification unit of the lighting device 4 may perform the first notification and the second notification by light using the light source 2. In this case, the notification control circuit 423 performs the notification by changing the lighting state of the light source 2. For example, the notification control circuit 423 periodically changes the light amount of the light source 2, periodically changes the light color of the light source 2, or blinks the light source 2. The notification unit may perform the first notification by using the light source 2 and the second notification by using a display element. Alternatively, the notification unit may perform the first notification by using a display element and the second notification by using the light source 2. In short, the notification unit may perform at least one of the first notification and the second notification by light using the light source 2.

[0071] Furthermore, when performing at least one of the first and second notifications, the notification unit may first dimly light (or blink) the light source 2 at a light intensity lower or higher than that of the light source 2 when the light source 2 is turned on in an emergency, and after a certain time has elapsed since the start of lighting, the notification unit may turn on (or blink) the light source 2 at the same light intensity as that of the light source 2 when the light source 2 is turned on in an emergency. Alternatively, the notification unit may gradually increase the light intensity of the light source 2 when performing at least one of the first and second notifications. Alternatively, the notification unit may first light (or blink) the display element 431 when performing at least one of the first and second notifications, and after a certain time has elapsed since the start of lighting the display element 431, the notification unit may turn on (or blink) the light source 2. Note that the dimming level during dimming is a dimming level less than 100% or a dimming level more than 100%.

[0072] As a sixth modified example of this embodiment, the notification unit of the lighting device 4 may perform the first notification and the second notification with light using at least one of the multiple light-emitting elements of the light source 2. The light source 2 includes multiple light-emitting elements. The notification unit may perform the first notification with at least one of the multiple light-emitting elements, and perform the second notification with a display element. Alternatively, the notification unit may perform the first notification with a display element, and perform the second notification with at least one of the multiple light-emitting elements. In short, the notification unit may perform at least one of the first notification and the second notification with light using the multiple light-emitting elements of the light source 2.

[0073] As a seventh modification of this embodiment, the notification section of the lighting device 4 may use the monitor lamp 48 as a display element for making the first notification and the second notification. The notification section may display only the first notification using the monitor lamp 48, or may make only the second notification using the monitor lamp 48. In short, the notification section may make at least one of the first notification and the second notification using the monitor lamp 48.

[0074] As an eighth modified example of this embodiment, the notification circuit 43 may perform the first notification when a person is present. More specifically, in the first function, the notification circuit 43 performs the first notification when a person is present when the use period Ta reaches the first notification period [Tc]. In this case, the notification control circuit 423 of the control circuit 42 acquires a detection result from a human sensor that detects the presence of a person when the use period Ta reaches the first notification period [Tc]. Then, when a person is present, the notification control circuit 423 controls the notification circuit 43 to perform the first notification. The notification circuit 43 performs the first notification according to the control by the notification control circuit 423. On the other hand, even if the use period Ta reaches the first notification period [Tc], when no person is present, the notification circuit 43 does not perform the first notification. That is, the notification circuit 43 performs the first notification when a person is present after the use period Ta reaches the first notification period [Tc].

[0075] Similarly, the notification circuit 43 may perform the second notification when a person is present. More specifically, in the second function, the notification circuit 43 performs the second notification when a person is present when the uninspected period Tb reaches the second notification period [Td]. In this case, the notification control circuit 423 acquires a detection result from a human sensor that detects the presence of a person when the uninspected period Tb reaches the second notification period [Td]. Then, when a person is present, the notification control circuit 423 controls the notification circuit 43 to perform the second notification. The notification circuit 43 performs the second notification according to the control by the notification control circuit 423. On the other hand, even if the uninspected period Tb reaches the second notification period [Td], when no person is present, the notification circuit 43 does not perform the second notification. That is, the notification circuit 43 performs the second notification when a person is present after the uninspected period Tb reaches the second notification period [Td].

[0076] As a ninth modification of the present embodiment, the notification circuit 43 may perform the first notification at a first timing determined in advance. More specifically, in the first function, when the usage period Ta reaches the first notification period [Tc], the notification circuit 43 performs the first notification at the first timing determined in advance. The first timing is a time or time period when the first notification is possible. For example, the first timing is a time or time period when there is a person in the building in which the disaster prevention lighting device 1 is installed. In the ninth modification, the control circuit 42 stores a schedule including the first timing in advance. When the usage period Ta reaches the first notification period [Tc], the notification control circuit 423 obtains the current time from the real-time clock and controls the notification circuit 43 to perform the first notification at the first timing according to the predetermined schedule. The notification circuit 43 performs the first notification at the first timing according to the control by the notification control circuit 423. As an example, when the first timing is 10:00 AM, if the usage period Ta reaches the first notification period [Tc], the notification circuit 43 performs the first notification at 10:00 AM. In other words, even if the usage period Ta reaches the first notification period [Tc], the notification circuit 43 does not perform the first notification until 10:00 AM. As another example, when the first timing is a time period from 7:00 PM to 9:00 PM (2 hours), if the usage period Ta reaches the first notification period [Tc], the notification circuit 43 performs the first notification during the time period from 7:00 PM to 9:00 PM. In other words, the notification circuit 43 does not perform the first notification during any time period other than the time period from 7:00 PM to 9:00 PM.

[0077] Similarly, the notification circuit 43 may perform the second notification at a second timing determined in advance. More specifically, in the second function, when the uninspected period Tb reaches the second notification period [Td], the notification circuit 43 performs the second notification at a second timing determined in advance. The second timing is, for example, a time or a time period. As an example, when the second timing is 3:00 p.m., when the uninspected period Tb reaches the second notification period [Td], the notification circuit 43 performs the second notification at 3:00 p.m. In other words, even if the uninspected period Tb reaches the second notification period [Td], the notification circuit 43 does not perform the second notification until 3:00 p.m. As another example, when the second timing is the time period from 6:00 p.m. to 10:00 p.m. (4 hours), when the uninspected period Tb reaches the second notification period [Td], the notification circuit 43 performs the second notification in the time period from 6:00 p.m. to 10:00 p.m. In other words, the notification circuit 43 does not perform the second notification during any time period other than the time period between 6:00 PM and 10:00 PM.

[0078] As a tenth modification of this embodiment, the first notification period may be a period shorter than the inspection period stipulated by law. More specifically, the control circuit 42 prestores a period shorter than the inspection period stipulated by law as the first notification period. Then, when the usage period reaches the first notification period, the notification control circuit 423 controls the notification circuit 43 to perform the first notification. The notification circuit 43 performs the first notification before the usage period reaches the inspection period stipulated by law, according to the control by the notification control circuit 423. The notification circuit 43 can perform the first notification at a timing earlier than the inspection timing stipulated by law. In this case, the first notification period is a period from the start of use of the battery 3 to a point before the inspection timing. For example, the first notification period is a timing earlier than the timing to inspect the battery 3 by a grace period. The length of the grace period is, for example, less than one week (for example, one day). This allows the inspector to perform the actual inspection so as to match the inspection period stipulated by law.

[0079] Similarly, the second notification period may be a period shorter than the inspection period stipulated by law. More specifically, the notification control circuit 423 prestores a period shorter than the inspection period stipulated by law as the second notification period. Then, when the uninspected period reaches the second notification period, the notification control circuit 423 controls the notification circuit 43 to perform the second notification. The notification circuit 43 performs the second notification before the uninspected period reaches the inspection period stipulated by law, according to the control by the notification control circuit 423. The notification circuit 43 can perform the second notification at a timing earlier than the inspection timing stipulated by law. In this case, the second notification period is a period from the previous inspection timing to a point before the next inspection timing. For example, the second notification period is a timing earlier than the timing to inspect the battery 3 by the grace period. The length of the grace period is, for example, less than one week (for example, one day). This allows the inspector to perform the actual inspection so as to match the inspection period stipulated by law.

[0080] As an eleventh modification of this embodiment, the power supply timer 421 may continue to measure the time not until the usage period Ta reaches the first notification period [Tc] but until the usage period Ta reaches the life of the battery 3 (see the imaginary line in FIG. 2). More specifically, the power supply timer 421 continues to measure the time without resetting the measured value when the usage period Ta reaches the first notification period [Tc]. Then, when the usage period Ta reaches the life, the notification control circuit 423 controls the notification circuit 43 to make a notification to prompt the user to replace the battery 3. The notification circuit 43 makes the notification in accordance with the control by the notification control circuit 423. When the usage period Ta reaches the life, the power supply timer 421 resets the measured value. After that, when the replacement process of the battery 3 is completed, the power supply timer 421 starts measuring the usage period Ta anew.

[0081] Furthermore, in the case where the battery 3 is not able to maintain discharge for a prescribed period of time during inspection of an emergency power source such as the battery 3, the notification control circuit 423 may control the notification unit to issue a notification urging replacement of the battery 3. The notification circuit 43 issues the notification in accordance with the control of the notification control circuit 423.

[0082] As an eleventh modification of this embodiment, there may be a disaster prevention lighting system B2 as shown in Fig. 5. The disaster prevention lighting system B2 includes a plurality of disaster prevention lighting devices 1 (four in the illustrated example).

[0083] In the disaster prevention lighting system B2, each of the multiple disaster prevention lighting devices 1 has a communication function. The lighting device 4 further includes a communication circuit connected to the communication line 8. The communication circuit transmits and receives signals via the communication line 8. It is preferable that the communication circuit transmits and receives signals in compliance with a wired LAN (Local Area Network) such as Ethernet (registered trademark) or a standard such as RS-485 (for example, IEEE 802.3 or RS-485). Therefore, in each lighting device 4 of the multiple disaster prevention lighting devices 1, the control circuit 42 controls the communication circuit to communicate via the communication line 8, and the control circuit 42 can exchange data with other lighting devices 4.

[0084] Each of the lighting devices 4 that are communicable via the communication line 8 communicates with the other lighting devices 4 other than the lighting device itself, thereby making the first and second notifications to the other disaster prevention lighting systems B2.

[0085] For example, each control circuit 42 of multiple lighting devices 4 controls the communication circuit to transmit data regarding a notification of inspection time to the other lighting devices 4 when the usage period reaches the notification period. Similarly, each control circuit 42 transmits data regarding a notification to the other lighting devices 4 when it is time to inspect the other lighting devices 4 when the uninspected period reaches the second notification period. In the other lighting devices 4, when the control circuit 42 acquires the above data, the notification control circuit 423 of the control circuit 42 issues a first or second notification. This allows the first and second notifications to be issued not only to the device itself but also to the other disaster prevention lighting fixtures 1.

[0086] Furthermore, each control circuit 42 of the multiple lighting devices 4 may transmit data regarding the inspection timing of its own device by multicast or broadcast.

[0087] Furthermore, each control circuit 42 of the multiple lighting devices 4 may periodically transmit a data request to the other lighting devices 4 by multicast or broadcast. The control circuit 42 that receives the data request returns data related to the inspection timing of its own device to the lighting device 4 that sent the data request.

[0088] The communication circuit may transmit and receive signals by wireless communication. For example, the communication circuit transmits and receives signals in accordance with standards such as wireless LAN, BLUETOOTH (registered trademark), or ZIGBEE (registered trademark) (for example, IEEE 802.11, IEEE 802.15.1, or IEEE 802.15.4). In this case, the disaster prevention lighting system does not require the communication line 8.

[0089] Therefore, each of the multiple lighting devices 4 included in the disaster prevention lighting system B2 can grasp the inspection time of the other lighting devices 4, and notifies the other lighting devices 4 of the inspection time of their own device.

[0090] (effect) The lighting device (4) according to the first embodiment includes a lighting circuit (41), a power supply timer (421), an inspection timer (422), and an alarm unit (alarm circuit 43). The lighting circuit (41) lights up the light source (2) with power supplied from an emergency power supply (battery 3) when the external power supply (9) is stopped. The emergency power supply is charged with power supplied from the external power supply (9). The power supply timer (421) measures the usage period (Ta) of the emergency power supply. The inspection timer (422) measures the period from the completion of inspection to discharge the emergency power supply as an uninspected period (Tb). The alarm unit has an alarm function. When the usage period (Ta) measured by the power supply timer (421) reaches an alarm period (first alarm period [Tc]), the alarm unit issues an alarm (first alarm N1) with at least one of light, sound, and an identifier.

[0091] According to the lighting device (4) of the first aspect, it is possible to notify the time to inspect the emergency power supply (battery 3). This makes it possible to notify, for example, an inspector or a manager of the time to inspect the emergency power supply.

[0092] In the lighting device (4) according to the second aspect, in the first aspect, the usage period (Ta) is the elapsed time from when charging of the emergency power supply (battery 3) starts.

[0093] According to the lighting device (4) of the second aspect, it is possible to notify the time to inspect the emergency power supply, taking into consideration the start of charging of the emergency power supply (battery 3).

[0094] In the lighting device (4) according to the third aspect, in the first aspect, the usage period (Ta) is the elapsed time from the time of manufacture of the emergency power source (battery 3).

[0095] According to the lighting device (4) of the third aspect, it is possible to notify the time to inspect the emergency power supply, taking into consideration the time of manufacture of the emergency power supply (battery 3).

[0096] In the lighting device (4) according to the fourth aspect, in the first aspect, the usage period (Ta) is the elapsed time from the attachment of the emergency power supply (battery 3).

[0097] According to the lighting device (4) of the fourth aspect, it is possible to notify the time to inspect the emergency power supply, taking into consideration the time when the emergency power supply (battery 3) is attached.

[0098] In the lighting device (4) of the fifth aspect, in the first aspect, the usage period (Ta) is the elapsed time from a timing obtained based on at least two of the time when charging of the emergency power source (battery 3) begins, the time when the emergency power source is manufactured, and the time when the emergency power source is installed.

[0099] The lighting device (4) of the fifth aspect can notify the time to inspect the emergency power supply by taking into consideration at least two of the following: the time when charging of the emergency power supply (battery 3) begins, the time when the emergency power supply is manufactured, and the time when the emergency power supply is installed.

[0100] In the lighting device (4) according to the sixth aspect, in any one of the first to fifth aspects, the notification section (notification circuit 43) has a first function and a second function. The first function performs a first notification (N1) with at least one of light, sound, and an identifier when the usage period (Ta) timed by the power supply timer (421) reaches a first notification period ([Tc]) that is a notification period. The second function performs a second notification (N2) with at least one of light, sound, and an identifier when the non-inspection period (Tb) timed by the inspection timer (422) reaches a second notification period ([Td]) after the usage period (Ta) reaches the first notification period ([Tc]).

[0101] According to the lighting device (4) of the sixth aspect, it is possible to periodically notify the time to inspect the emergency power supply (battery 3). This makes it possible to periodically notify an inspector or manager of the time to inspect the emergency power supply.

[0102] In the lighting device (4) according to the seventh aspect, in the sixth aspect, the notification unit (notification circuit 43) has a display element different from the light source (2). The notification unit performs at least one of the first notification and the second notification using light emitted by the display element.

[0103] According to the lighting device (4) of the seventh aspect, notification can be easily performed by using the display element.

[0104] In the lighting device (4) according to the eighth aspect, in the sixth aspect, the notification section (notification circuit 43) performs at least one of the first notification and the second notification using light emitted by the light source (2).

[0105] According to the lighting device (4) of the eighth aspect, notification can be easily performed without adding other light-emitting elements.

[0106] In the lighting device (4) according to the ninth aspect, in the sixth aspect, the light source (2) includes a plurality of light-emitting elements. The notification unit (notification circuit 43) performs at least one of the first notification and the second notification using light emitted by at least one of the plurality of light-emitting elements.

[0107] According to the lighting device (4) of the ninth aspect, it is possible to perform notification in a manner that distinguishes it from normal lighting.

[0108] In the lighting device (4) according to the tenth aspect, in any one of the sixth to ninth aspects, the notification section (notification circuit 43) performs at least one of the first notification and the second notification by blinking.

[0109] According to the lighting device (4) of the tenth aspect, it is possible to clearly inform an inspector or manager of the time when the emergency power source (battery 3) is turned on.

[0110] In the lighting device (4) according to an eleventh aspect, in any one of the sixth to ninth aspects, the notification section (notification circuit 43) performs at least one of the first notification and the second notification by lighting.

[0111] According to the lighting device (4) of the eleventh aspect, by lighting, it is possible to clearly inform an inspector or manager that it is time to inspect the emergency power supply.

[0112] In a lighting device (4) according to a twelfth aspect, in any one of the sixth to eleventh aspects, the power supply timer (421) continues timing the usage period (Ta) even if inspection is performed before the usage period (Ta) reaches the first notification period ([Tc]).

[0113] According to the lighting device (4) of the twelfth aspect, for example, by setting the period during which inspection of the emergency power source (battery 3) is not required due to laws and regulations as the first notification period ([Tc]), it is possible to reliably issue a notification at the timing when inspection is required after the period during which inspection is not required has elapsed.

[0114] In the lighting device (4) according to a thirteenth aspect, in any one of the sixth to twelfth aspects, the inspection timer (422) resets the measured value of the uninspected period (Tb) when inspection is performed before the uninspected period (Tb) reaches the second notification period ([Td]).

[0115] According to the lighting device (4) of the thirteenth aspect, when an inspection is actually performed, the timer value is reset, so that the next inspection time can be notified with high accuracy.

[0116] In the lighting device (4) according to the fourteenth aspect, in any one of the sixth to thirteenth aspects, the notification unit (notification circuit 43) performs a first notification (N1) when a person is present when the usage period (Ta) reaches the first notification period ([Tc]) in the first function. The notification unit performs a second notification (N2) when a person is present when the uninspected period (Tb) reaches the second notification period ([Td]) in the second function.

[0117] According to the lighting device (4) of the fourteenth aspect, when a person is present, it is possible to perform an alert, and therefore it is possible to reduce unnecessary alerts.

[0118] In the lighting device (4) according to the fifteenth aspect, in any one of the sixth to fourteenth aspects, the notification unit (notification circuit 43) performs a first notification (N1) at a predetermined first timing when the usage period (Ta) reaches the first notification period ([Tc]) in the first function. The notification unit performs a second notification (N2) at a predetermined second timing when the uninspected period (Tb) reaches the second notification period ([Td]) in the second function.

[0119] According to the lighting device (4) of the fifteenth aspect, the time to inspect the emergency power supply (battery 3) is not notified immediately, but can be notified at a convenient timing.

[0120] A disaster prevention lighting device (1) according to a sixteenth aspect includes any one of the lighting devices (4) according to the first to fifteenth aspects, a light source (2), an emergency power source (battery 3), and a main body (10). The light source (2) is turned on by power from the lighting device (4). The lighting device (4), the light source (2), and the emergency power source are attached to the main body (10).

[0121] In the disaster prevention lighting device (1) according to the sixteenth aspect, the lighting device (4) can notify the time to inspect the emergency power supply (battery 3). This makes it possible to notify, for example, an inspector or a manager of the time to inspect the emergency power supply.

[0122] A disaster prevention lighting system (B1; B2) according to a seventeenth aspect includes a plurality of disaster prevention lighting devices (1) according to the sixteenth aspect.

[0123] According to the disaster prevention lighting system (B1; B2) of the seventeenth aspect, the time to inspect the emergency power source (battery 3) can be notified in each of the plurality of disaster prevention lighting devices (1). This makes it possible to inform, for example, an inspector or a manager of the time to inspect the emergency power source. [Explanation of symbols]

[0124] 1. Emergency lighting equipment 2 light source 3 Batteries (emergency power supply) 4. Lighting device 41 Lighting circuit 421 Power Timer 422 Check timer 43 Alarm circuit (alarm section) 9 External power supply B1, B2 Disaster Prevention Lighting System Ta Usage period Tb Uninspected period [Tc] First notification period [Td] Second notification period N1 First notice N2 Second Notification

Claims

1. a lighting circuit for lighting the light source with power supplied from an emergency power source that is charged with power supplied from the external power source when the external power source is stopped; a power supply timer that measures a period during which the emergency power supply is in use; A notification unit having a notification function, The notification unit issues a notification using at least one of a light, a sound, and an identifier when the usage period measured by the power supply timer reaches a notification period that is a period before an inspection time of the emergency power supply, The power supply timer continues to measure the usage period even if an inspection is performed to discharge the emergency power supply before the usage period reaches the notification period. Lighting device.

2. The notification unit is When the usage period reaches the notification period, if a person is present, the notification is performed. The lighting device according to claim 1 .

3. The notification unit is When the usage period reaches the notification period, the notification is performed at a preset timing.

3. The lighting device according to claim 1 or 2.

4. A lighting device according to any one of claims 1 to 3, The light source; The emergency power supply; A main body to which the lighting device, the light source, and the emergency power supply are attached. Disaster prevention lighting equipment.

5. A lighting system comprising a plurality of the disaster prevention lighting devices according to claim 4. Disaster prevention lighting system.

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