Lighting fixture

Abstract

To obtain a lighting fixture that can prevent a user from mistakingly determining that an abnormality or power outage has occurred during inspection and allows inspection to be performed under the same conditions as when emergency lighting is performed.SOLUTION: A lighting fixture according to the present disclosure includes: a light source unit; a lighting circuit that supplies power to the light source unit from a commercial power source or an emergency power source to turn on the light source unit; and a control unit that controls the lighting circuit. The control unit has: a normal lighting mode in which the light source unit is turned on with power from the commercial power source; an emergency lighting mode in which the light source unit is turned on with power from the emergency power source in an emergency; and an automatic inspection mode for inspecting the emergency power source. In the automatic inspection mode, the power supplied to the light source unit from the emergency power source is the same as in the emergency lighting mode, and the light source unit is turned on with power from the commercial power source and the emergency power source.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to lighting fixtures. [Background technology]

[0002] Patent Document 1 discloses a lighting device for a disaster prevention lighting device. This lighting device includes a lighting circuit, a power supply timer, and a control circuit. The lighting circuit lights the light source with emergency power supplied from an emergency power supply when the external power supply is stopped. The power supply timer measures the battery usage period. After the measured value of the usage period reaches a predetermined inspection value, the control circuit performs an inspection to discharge the emergency power supply. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-027706 Summary of the Invention [Problem to be solved by the invention]

[0004] The lighting device of Patent Document 1 stops the lighting circuit when no power outage is detected, and operates the lighting circuit to turn on the light source during inspection. As a result, the lighting state of the light source differs significantly between normal use and automatic inspection. Therefore, during inspection, there is a risk that the user may mistakenly believe that there is an abnormality or power outage in the lighting fixture.

[0005] The present disclosure aims to provide a lighting fixture that can prevent a user from mistakenly believing that an abnormality or power outage has occurred during inspection, and that allows inspection to be carried out under the same conditions as when emergency lighting is on. [Means for solving the problem]

[0006] The lighting fixture according to the present disclosure comprises a light source unit, a lighting circuit that supplies power to the light source unit from a commercial power source or an emergency power source to turn on the light source unit, and a control unit that controls the lighting circuit, and the control unit has a normal lighting mode in which the light source unit is turned on with power from the commercial power source, an emergency lighting mode in which the light source unit is turned on with power from the emergency power source in an emergency, and an automatic inspection mode for inspecting the emergency power source, and in the automatic inspection mode, the power supplied to the light source unit from the emergency power source is the same as in the emergency lighting mode, and the light source unit is turned on with power from the commercial power source and the emergency power source. [Effects of the Invention]

[0007] According to the lighting fixture disclosed herein, the light source unit is lit in both the normal lighting mode and the automatic inspection mode. This prevents the user from mistakenly believing that an abnormality or power outage has occurred during inspection. Furthermore, in the automatic inspection mode, the power supplied to the light source unit from the emergency power source is the same as in the emergency lighting mode, so inspection can be performed under the same conditions as in emergency lighting. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing a lighting fixture according to a first embodiment. [Figure 2] 1 is a block diagram of a lighting fixture according to a first embodiment. [Figure 3] 4 is a diagram illustrating an operation mode of a control unit according to the first embodiment. FIG. [Figure 4] FIG. 10 is a diagram illustrating an automatic inspection mode of a lighting fixture according to a comparative example. [Figure 5] FIG. 2 is a diagram illustrating an automatic inspection mode of the lighting fixture according to the first embodiment. [Figure 6] FIG. 10 is a circuit block diagram of a lighting fixture according to a comparative example. [Figure 7] FIG. 10 is a diagram illustrating the relationship between a normal lighting current and an emergency lighting current according to a comparative example. [Figure 8] 1 is a circuit block diagram of a lighting fixture according to a first embodiment. [Figure 9]4 is a diagram illustrating the relationship between a normal lighting current and an emergency lighting current according to the first embodiment. FIG. [Figure 10] FIG. 10 is a circuit block diagram of a lighting fixture according to a modified example of the first embodiment. [Figure 11] FIG. 10 is a diagram showing a lighting fixture according to a second embodiment. [Figure 12] FIG. 10 is a block diagram of a lighting fixture according to a second embodiment. [Figure 13] FIG. 10 is a diagram illustrating an operation mode of a control unit according to the second embodiment. [Figure 14] FIG. 10 is a diagram illustrating an automatic inspection mode of a lighting fixture according to a comparative example. [Figure 15] FIG. 10 is a diagram illustrating an automatic inspection mode of the lighting fixture according to the second embodiment. [Figure 16] FIG. 10 is a circuit block diagram of a lighting fixture according to a second embodiment. [Figure 17] FIG. 10 is a circuit block diagram of a lighting fixture according to a third embodiment. [Figure 18] FIG. 10 is a diagram illustrating the relationship between the normal lighting current and the emergency lighting current according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The lighting fixtures according to each embodiment will be described with reference to the drawings. In the drawings, the same reference numerals indicate the same or equivalent parts. This applies to all of the embodiments described below. Furthermore, the dimensional relationships between the components in the drawings may differ from those in reality. Furthermore, the configurations of the components shown in the entire specification are merely examples and are not limited to the configurations described in the specification. In particular, the combinations of the components are not limited to the combinations in each embodiment, and components described in other embodiments may be applied to other embodiments.

[0010] Embodiment 1 FIG. 1 is a diagram showing a lighting fixture 1 according to a first embodiment. The lighting fixture 1 is an emergency light used, for example, in the event of a disaster or power outage. The lighting fixture 1 has a main body 2, a display unit 3, an inspection switch 5, and an alarm unit 6. The main body 2 forms the outer shell of the lighting fixture 1 and houses devices described below. The main body 2 is attached to the ceiling, wall, floor, or other location where the lighting fixture 1 is to be installed.

[0011] Display unit 3 is provided on the surface of main body 2 and displays pictograms, arrows, etc. indicating emergency exits or evacuation directions in the event of a disaster or power outage. Display unit 3 is illuminated at a predetermined brightness by light emitters 12, which will be described later. Hereinafter, the illumination of display unit 3 may be described as the illumination of lighting fixture 1. Display unit 3 may be integral with main body 2, or may be a panel provided on one surface of main body 2.

[0012] The inspection switch 5 is one or more switches that are operated by the manager of the lighting fixture 1 when inspecting the remaining battery power of the emergency power supply 11, which will be described later. When the inspection switch 5 is operated, the lighting fixture 1 operates in various inspection modes, as will be described later.

[0013] The notification unit 6 issues a notification based on a notification signal from the control device 10, which will be described later. The notification unit 6 has, for example, an LED (Light Emitting Diode), and issues a notification by emitting light from the LED. In particular, the notification unit 6 of this embodiment notifies that an inspection operation is in progress or the inspection result.

[0014] 2 is a block diagram of lighting fixture 1 according to embodiment 1. Display unit 3 has light source unit 15. Lighting fixture 1 also has emergency power supply 11 and control device 10. Light source unit 15 is housed in main body 2 of lighting fixture 1, and has mounting board 13 and light emitter 12 mounted on mounting board 13.

[0015] The light emitter 12 emits light to light up the lighting fixture 1. Specifically, during normal use when power is supplied from the commercial power source 100, the light emitter 12 emits light using the power supplied from the commercial power source 100 to light up the lighting fixture 1. Furthermore, during an emergency when power from the commercial power source 100 is cut off, the light emitter 12 emits light using the power supplied from the emergency power source 11 to light up the lighting fixture 1. The light emitter 12 is, for example, an LED. The light emitter 12 may also be, for example, an organic EL (Electro Luminescence) or a laser diode.

[0016] Emergency power supply 11 is, for example, a storage battery, and is stored in main body 2. Emergency power supply 11 stores power when power is supplied from commercial power supply 100. When power is not supplied from commercial power supply 100, emergency power supply 11 serves as a backup power supply and supplies power to each device of lighting fixture 1. Here, emergency power supply 11 is, for example, a Ni-MH storage battery. Emergency power supply 11 is not limited to this, and may be, for example, a secondary battery such as a Ni-Cd storage battery or a Li-Ion battery. Furthermore, emergency power supply 11 does not have to be stored in main body 2.

[0017] Control device 10 is a device that controls operations such as lighting and inspection of lighting fixture 1, and is stored, for example, in main body 2 of lighting fixture 1. Control device 10 has lighting circuit 10A, charging circuit 10B, and control unit 10C to realize the above-mentioned functions. Control unit 10C has inspection processing unit 10D and timer unit 10E.

[0018] The lighting circuit 10A supplies power from the commercial power supply 100 or the emergency power supply 11 to the light source unit 15 to light the light source unit 15. The lighting circuit 10A controls the light emitting state of the light emitter 12. The lighting circuit 10A mainly performs functions (1) and (4) described below. The charging circuit 10B controls charging when the emergency power supply 11 is charged with power supplied from the commercial power supply 100. The charging circuit 10B mainly performs function (2) described below.

[0019] The control unit 10C controls the lighting circuit 10A and the charging circuit 10B. The control unit 10C can be configured as hardware, for example, a microcomputer having a processing device such as a processor or a CPU (Central Processing Unit). The control unit 10C may be configured with multiple processing devices. The control unit 10C may be configured so that the processor executes a program that causes the control device 10 to perform functions (1) to (9) described below.

[0020] The inspection processing unit 10D performs processing related to inspection control when executing various inspection functions described below. The inspection processing unit 10D mainly performs functions (5) to (9) described below. The timing unit 10E has a timer and measures time. The time measured by the timing unit 10E is used when the inspection processing unit 10D and the like perform control. The timing unit 10E mainly performs function (3) described below.

[0021] Control device 10 of the first embodiment has the following functions (1) to (9), and performs functions such as turning lighting fixture 1 on and off, charging emergency power supply 11, and inspecting emergency power supply 11. (1) A function of receiving power from the commercial power source 100 to cause the light emitter 12 to emit light and turn on the lighting fixture 1. (2) A normal charging function for receiving power from the commercial power source 100 and charging the emergency power source 11 normally. Here, the normal charging is performed by trickle charging, for example, by supplying a minute current to the emergency power source 11 to charge it. (3) A timer function that measures the elapsed time that power is supplied from the commercial power source 100. (4) When the power supply from the commercial power source 100 is cut off, the power supply is switched to the power supply from the emergency power source 11, causing the light source 12 to emit light and turning on the lighting fixture 1. (5) An inspection function to check whether the lighting fixture 1 can be lit for a specified time by the emergency power supply 11 and to check the deterioration status of the emergency power supply 11. The specified time is preferably 60 minutes or less, for example, 20 minutes or 60 minutes. Function (5) realizes the inspection function by illuminating the light-emitting body 12. (6) An automatic inspection function that, when the inspection switch 5 is operated, causes the emergency power supply 11 to illuminate the light source 12 and perform the inspection of function (5). (7) A periodic automatic inspection function that automatically executes the inspection of function (5) after a predetermined time interval has elapsed using the timer function of function (3), without the need to operate inspection switch 5. The inspection by function (7) is carried out for a predetermined specified time. (8) A manual inspection function that uses the emergency power supply 11 to illuminate the light source 12 only while the inspection switch 5 is being operated, to check whether the lighting fixture 1 can be turned on. (9) A function of causing the notification unit 6 to notify the results of the inspections performed based on functions (5) to (7).

[0022] 3 is a diagram illustrating the operation modes of control unit 10C according to embodiment 1. Lighting device 1 can operate in four modes: (a) normal lighting mode, (b) emergency lighting mode, (c) manual inspection mode, and (d) automatic inspection mode. (c) manual inspection mode and (d) automatic inspection mode are inspection modes for inspecting emergency power supply 11.

[0023] The normal lighting mode (a) is a mode in a normal state when there is a supply of commercial power 100. In the normal lighting mode, the control unit 10C lights the light source unit 15 with power from the commercial power source 100. In the normal lighting mode, the lighting circuit 10A executes function (1) to cause the light emitter 12 to emit light with power supplied from the commercial power source 100. In the normal lighting mode, the charging circuit 10B executes function (2) to charge the emergency power source 11.

[0024] The emergency lighting mode (b) is a mode used in an emergency when the supply of commercial power supply 100 is cut off. In the emergency lighting mode, control unit 10C lights up light source unit 15 with power from emergency power supply 11 in an emergency. When control unit 10C detects that the power supply from commercial power supply 100 has been cut off due to a power outage, it switches from normal lighting mode to emergency lighting mode. Lighting circuit 10A executes function (4) to cause light-emitting element 12 to emit light with the power supplied from emergency power supply 11, thereby lighting lighting device 1. At this time, light-emitting element 12 becomes a load, and emergency power supply 11 discharges.

[0025] If the power supplied to the light emitting body 12 in the normal lighting mode is 100%, the power supplied to the light emitting body 12 in the emergency lighting mode is, for example, 50%. In this way, the power supplied to the light emitting body 12 in the emergency lighting mode is smaller than the power supplied to the light emitting body 12 in the normal lighting mode. For this reason, in the emergency lighting mode, the display unit 3 lights up more dimmer than in the normal lighting mode.

[0026] The manual inspection mode (c) is a mode in which an inspection is performed with the operation of the inspection switch 5 by an administrator as the inspection start condition. In the manual inspection mode, the control unit 10C turns on the light source unit 15 with power from the emergency power supply 11 when the inspection switch 5 is operated. Specifically, in the manual inspection mode, the inspection processing unit 10D executes the automatic inspection function of function (6) or the manual inspection function of function (8) and issues a notification of function (9). As the manual inspection mode, both or only one of the automatic inspection function of function (6) and the manual inspection function of function (8) may be employed. In the manual inspection mode, the light source unit 15 performs emergency lighting at the same brightness as in the emergency lighting mode.

[0027] The automatic inspection mode (d) is a mode in which inspection is performed automatically, with the lapse of a predetermined time interval as the inspection start condition. In the automatic inspection mode, the inspection processing unit 10D executes the periodic automatic inspection function of function (7). In other words, in the automatic inspection mode, the control unit 10C causes the light source unit 15 to emit light using power from the emergency power supply 11 at predetermined time intervals for a predetermined specified time.

[0028] Next, the automatic inspection mode will be described in detail. Emergency exit lights regulated by the Fire Service Act, for example, have a built-in emergency power supply 11 that is charged, and in the event of a power outage when power from the commercial power supply 100 is cut off, the light source is turned on by the power supply from the emergency power supply 11. Here, the duration of illumination by the emergency power supply 11 is regulated for emergency exit lights, and in the event of a power outage, the lights must be able to remain illuminated for at least the regulated duration. The illumination duration for emergency exit lights is 20 minutes or 60 minutes.

[0029] The duration of illumination of lighting fixture 1 depends on the charge level of emergency power supply 11 and the deterioration state of emergency power supply 11. Emergency lights mainly use trickle charging as a charging method, and under normal circumstances, the power of emergency power supply 11 is controlled so that it is always fully charged. However, as emergency power supply 11 deteriorates, the duration of illumination tends to become shorter over time, even if it is fully charged.

[0030] For this reason, it is necessary to check the deterioration state of the emergency power supply 11 by periodically inspecting whether the lighting fixture 1 can be turned on for the specified time, and if deterioration of the emergency power supply 11 is found, to replace the emergency power supply 11 so that the lighting fixture 1 can be maintained and managed in a state where it can be turned on for the specified time. Such maintenance is generally performed by an administrator, who then checks the inspection results. In this case, the management of the lighting fixture 1 depends on the frequency of inspections by the administrator. This raises concerns that the inspection intervals will be long and that the emergency power supply 11 will not be replaced at the appropriate time.

[0031] In lighting fixture 1 of this embodiment, control device 10 has the periodic automatic inspection functions of functions (5) and (7) described above. In automatic inspection mode, control device 10 uses the timer function of function (3) to automatically perform an inspection when, for example, the time since receiving power from commercial power source 100 reaches the inspection interval, even if inspection switch 5 is not operated. Here, the time interval for the automatic inspection mode described above is not particularly specified, but is preferably, for example, six months or more, such as six months or one year. Inspection using the automatic inspection mode is preferably performed once a year.

[0032] Next, a method for determining whether lighting fixture 1 can be lit for a specified time with power supplied from emergency power source 11 will be described. FIG. 4 is a diagram illustrating the automatic inspection mode of a lighting fixture according to a comparative example. The left side of FIG. 4 shows a simplified diagram of the brightness of display unit 803 according to the comparative example in normal lighting mode. The right side of FIG. 4 shows a simplified diagram of the brightness of display unit 803 according to the comparative example in automatic inspection mode. In automatic inspection mode, control device 10 according to the comparative example supplies the same power as in emergency lighting mode from emergency power source 11 to light-emitting element 12. The value of this power is, for example, half that of normal lighting mode, or 50%. Then, control device 10 performs inspection by determining whether the voltage of emergency power source 11 remains equal to or higher than a threshold voltage after the specified time has elapsed.

[0033] In the lighting fixture of the comparative example, the brightness of the display unit 803 is lower in the automatic inspection mode than in the normal lighting mode. Therefore, the change in brightness may be noticed by a user in the location where the lighting fixture is installed. In this case, the user may mistakenly believe that there is a power outage or that there is a malfunction in the lighting fixture.

[0034] FIG. 5 is a diagram illustrating the automatic inspection mode of lighting fixture 1 according to the first embodiment. The left side of FIG. 5 shows a simplified representation of the brightness of display unit 3 in normal lighting mode. The right side of FIG. 5 shows a simplified representation of the brightness of display unit 3 in automatic inspection mode. In the automatic inspection mode of this embodiment, the power supplied from emergency power supply 11 to light source unit 15 is the same as in the emergency lighting mode. Furthermore, in the automatic inspection mode of this embodiment, light source unit 15 is illuminated by power from commercial power supply 100 and emergency power supply 11.

[0035] As described above, in the automatic inspection mode of the present embodiment, control unit 10C sets the power supplied from emergency power supply 11 to light source unit 15 to the same level as in the emergency lighting mode, and lights light source unit 15 with power from commercial power supply 100 and emergency power supply 11. This causes display unit 3 to light up more brightly in the automatic inspection mode than in the emergency lighting mode. This makes it difficult for the user to recognize that an inspection is being performed, and prevents the user from mistakenly believing that an abnormality or power outage has occurred in lighting fixture 1.

[0036] Furthermore, in the automatic inspection mode of this embodiment, the power supplied to the light source unit 15 may be the same as that in the normal lighting mode. In the automatic inspection mode, for example, 50% of the power in the normal lighting mode is supplied to the light source unit 15 from the commercial power source 100, and 50% of the power in the normal lighting mode is supplied from the emergency power source 11. As a result, in the automatic inspection mode, the brightness of the light emitter 12 becomes the same as that in the normal lighting mode.

[0037] As described above, in the automatic inspection mode of this embodiment, the power supplied to the light source unit 15 from the commercial power source 100 and the emergency power source 11 may be the same as the power supplied to the light source unit 15 from the commercial power source 100 in the normal lighting mode. This allows the display unit 3 to be lit at the same brightness in the normal lighting mode and the automatic inspection mode. This further reduces user misunderstanding.

[0038] Furthermore, in the automatic inspection mode of this embodiment, the same amount of power as in the emergency lighting mode is supplied from the emergency power supply 11 to the light source unit 15. This allows inspection of the emergency power supply 11 under the same conditions as in the actual emergency lighting mode, improving the accuracy of the inspection.

[0039] Another comparative example is a lighting fixture whose light source unit is turned off during normal use when power is supplied from commercial power source 100. In this case, the lighting state of the light source differs significantly between normal use and automatic inspection, which can easily lead to user confusion. In contrast, lighting fixture 1 of the present embodiment has light source unit 15 turned on in both normal use mode and automatic inspection mode. This prevents the user from mistaking the lighting state for an abnormality or power outage during inspection.

[0040] The control unit 10C, using the function (9) described above, sends a notification signal based on the inspection result to the notification unit 6. The notification unit 6 displays the notification signal based on the notification signal and notifies the manager.

[0041] FIG. 6 is a circuit block diagram of a lighting fixture 801 according to a comparative example. Note that components such as a control unit 10C, a circuit board, and the lighting fixture are omitted from FIG. 6. In the lighting fixture 801, a control device 810 includes a lighting circuit 810A. In the normal lighting mode, a normal constant current circuit 19 of the lighting circuit 810A receives power from a commercial power source 100 via an AC / DC circuit and outputs a normal lighting current. This causes the light emitter 12 to light up normally. Furthermore, a charging circuit 10B receives current from the normal constant current circuit and charges the emergency power supply 11. At this time, a charging switch 16 and a normal switch 17 are conductive.

[0042] On the other hand, in the emergency lighting mode in which the commercial power supply 100 is cut off, the charging switch 16 and the normal switch 17 are turned off, and the emergency switch 18 is turned on. At this time, the emergency constant current circuit 20 of the lighting circuit 810A is supplied with power from the emergency power supply 11 and outputs an emergency lighting current, which causes the light emitter 12 to light up.

[0043] In the automatic inspection mode, the charging switch 16 and the normal switch 17 are disconnected and the emergency switch 18 is connected while the commercial power supply 100 is energized. This causes the same emergency lighting current as in the emergency lighting mode to be supplied to the light emitter 12, and inspection of the emergency power supply 11 is carried out.

[0044] The normal lighting current and emergency lighting current are detected by current detection resistor 21 and controlled to be constant. Here, the emergency lighting current in the emergency lighting mode is smaller than the normal lighting current in the normal lighting mode, for example, the emergency lighting current is 50% of the normal lighting current 100%.

[0045] FIG. 7 is a diagram illustrating the relationship between the normal lighting current and the emergency lighting current according to a comparative example. In a lighting fixture 801 according to the comparative example, the current flowing through the light emitter 12 is controlled to 100% of the normal lighting current in normal lighting mode or 50% of the emergency lighting current in emergency lighting mode. The brightness of the light emitter 12 varies depending on the current value. Therefore, if the same power is output to the light emitter 12 in automatic inspection mode as in emergency lighting mode, the light emitter 12 will light up more dimmer in automatic inspection mode than in normal lighting mode. This may cause a sense of discomfort to the user.

[0046] FIG. 8 is a circuit block diagram of lighting fixture 1 according to embodiment 1. The circuit configuration of lighting fixture 1 differs from that of lighting fixture 801 in that lighting fixture 1 does not include normal switch 17 and emergency switch 18, but includes emergency current detection resistor 22. In normal lighting mode, lighting circuit 10A receives power from commercial power source 100 via an AC / DC circuit and outputs a normal lighting current. This causes light emitter 12 to light up normally. The normal lighting current is detected by current detection resistor 21, and is constant-current controlled by normal constant current circuit 19. In this way, normal constant current circuit 19 is a circuit that supplies a constant current from commercial power source 100 to light source unit 15 in normal lighting mode.

[0047] In the normal lighting mode, the charging circuit 10B receives current from the normal constant current circuit 19 and charges the emergency power supply 11. At this time, the charging switch 16 is conductive. The emergency constant current circuit 20 is stopped, and no emergency lighting current flows.

[0048] In the emergency lighting mode in which the commercial power supply 100 is cut off, the charging switch 16 is turned off, and charging to the emergency power supply 11 is stopped. In addition, the normal constant current circuit 19 is stopped, and the emergency constant current circuit 20 is started, and an emergency lighting current is supplied to the light emitter 12. This causes the light emitter 12 to light up. The emergency lighting current is detected by the emergency current detection resistor 22, and is constant-current controlled by the emergency constant current circuit 20. In this way, the emergency constant current circuit 20 is a circuit that supplies a constant current from the emergency power supply 11 to the light source unit 15 in the emergency lighting mode.

[0049] In the emergency lighting mode, it is necessary to light the light emitter 12 for a certain period of time or more with power supplied from the emergency power source 11. The emergency lighting current in the emergency lighting mode is smaller than the normal lighting current in the normal lighting mode, for example, the emergency lighting current is 50% of the normal lighting current of 100%.

[0050] In the automatic inspection mode, the charging switch 16 is turned off while the commercial power source 100 is energized, and the emergency constant current circuit 20 outputs an emergency lighting current using power supplied from the emergency power source 11. The normal constant current circuit 19 is also activated, and controls the current value of the current detection resistor 21 to be constant. Therefore, the normal lighting current is supplied to the light emitter 12. In other words, in the automatic inspection mode, the combined current of the currents from the normal constant current circuit 19 and the emergency constant current circuit 20 is supplied to the light source unit 15. In the automatic inspection mode, the power supplied to the light source unit 15 from the commercial power source 100 and the power supplied to the light source unit 15 from the emergency power source 11 are both output with high impedance and supplied to the light source unit 15 simultaneously.

[0051] In the automatic inspection mode, the normal constant current circuit 19 performs constant current control on the current obtained by adding together the currents from the normal constant current circuit 19 and the emergency constant current circuit 20. The emergency constant current circuit 20 also performs constant current control on only the current from the emergency constant current circuit 20. The normal lighting current is greater than the emergency lighting current. Therefore, the shortfall in the emergency lighting current relative to the normal lighting current is supplied from the normal constant current circuit 19. As a result, the same current as in the normal lighting mode before switching to the automatic inspection mode flows through the light emitter 12, while the emergency lighting current flows from the emergency constant current circuit 20.

[0052] The normal constant current circuit 19 is, for example, a flyback circuit, and the emergency constant current circuit 20 is, for example, a boost circuit.

[0053] FIG. 9 is a diagram illustrating the relationship between the normal lighting current and the emergency lighting current according to the first embodiment. If the normal lighting current in the normal lighting mode is 100%, the emergency lighting current in the emergency lighting mode is, for example, 50%. Therefore, in the emergency lighting mode, the power supplied to the light-emitting element 12 is lower than in the normal lighting mode, and the lighting fixture 1 lights up more dimly than in the normal lighting mode. On the other hand, in the automatic inspection mode, the normal constant current circuit 19 compensates for the current shortfall compared to 100%. Therefore, there is no difference in brightness between the normal lighting mode and the automatic inspection mode. Therefore, automatic inspection can be performed while minimizing the discomfort felt by the user.

[0054] 10 is a circuit block diagram of lighting device 201 according to a variation of embodiment 1. Lighting circuit 210A of lighting device 201 differs from lighting circuit 10A in that it does not have current detection resistor 21 and detects the normal lighting current using normal current detection resistor 23. Lighting circuit 210A uses the same control methods in the normal lighting mode and emergency lighting mode as lighting circuit 10A.

[0055] On the other hand, in automatic inspection mode, the normal constant current circuit 19 does not control the current of the entire light emitting body 12, but rather sets the normal lighting current to 50% of that in normal lighting mode and outputs it. By adding together 50% normal lighting current and 50% emergency lighting current, it is possible to supply 100% current to the light emitting body 12, the same as in normal lighting mode. In other words, in lighting circuit 10A, the target current value of the normal constant current circuit 19 was set to the target value of the current flowing through the light emitting body 12, but in lighting circuit 210A, the target current value of the normal constant current circuit 19 is set to the difference between the target value of the current flowing through the light emitting body 12 and the emergency lighting current.

[0056] The above-described modifications can be applied as appropriate to the lighting fixtures according to the following embodiments. Note that the lighting fixtures according to the following embodiments have many points in common with the first embodiment, so the following description will focus on the differences from the first embodiment.

[0057] Embodiment 2 FIG. 11 is a diagram showing a lighting fixture 301 according to a second embodiment. The lighting fixture 301 of this embodiment has a normal light source unit 15a and an emergency light source unit 15b as light source units. The lighting fixture 301 is an emergency lighting fixture. The specifications of emergency lighting fixtures are regulated by the Building Standards Act. Note that FIG. 11 does not show the inspection switch 5 and alarm unit 6 provided on the main body 302. The inspection switch 5 and alarm unit 6 may be provided on a remote control that operates the lighting fixture 301, rather than on the main body 302.

[0058] 12 is a block diagram of a lighting fixture 301 according to embodiment 2. The lighting fixture 301 includes a control device 310, an inspection switch 5, a notification unit 6, an emergency power supply 11, a normal light source unit 15a, an emergency light source unit 15b, and a normal lighting device 330.

[0059] The normal light source unit 15a is a light source that is used when power is supplied from the commercial power source 100. The emergency light source unit 15b is a light source that is used with power supplied from the emergency power source 11 when power supply from the commercial power source 100 is cut off. The normal light source unit 15a has a normal light emitter 12a and a mounting board 13a on which the normal light emitter 12a is mounted. The emergency light source unit 15b has an emergency light emitter 12b and a mounting board 13b on which the emergency light emitter 12b is mounted.

[0060] The power supplied to the emergency light emitter 12b by the emergency light source unit 15b is lower than the power supplied to the normal light emitter 12a by the normal light source unit 15a. If the power supplied to the normal light emitter 12a of the normal light source unit 15a is 100%, the power supplied to the emergency light emitter 12b by the emergency light source unit 15b is, for example, 50%. Therefore, the emergency light source unit 15b in the emergency lighting mode lights up more dimly than the normal light source unit 15a in the normal lighting mode.

[0061] The normal lighting device 330 controls the light emitting state of the normal light emitter 12a. The normal lighting device 330 mainly performs function (1) described below. The lighting circuit 310A of the control device 310 mainly performs function (4) described below. The charging circuit 10B controls charging when the power supplied from the commercial power source 100 is charged into the emergency power source 11. The charging circuit 10B mainly performs function (2) described below.

[0062] The control unit 10C controls the lighting circuit 310A and the charging circuit 10B. The inspection processing unit 10D performs processing related to inspection control when executing various inspection functions described below. The inspection processing unit 10D mainly performs functions (5) to (9) described below. The timing unit 10E has a timer and measures time. The time measured by the timing unit 10E is used when the inspection processing unit 10D and the like perform control. The timing unit 10E mainly performs function (3) described below. The control unit 10C may be configured so that a processor executes a program to cause the control device 310 to perform functions (1) to (9) described below.

[0063] The normal lighting device 330 and the control device 310 of this embodiment have the following functions (1) to (9), and perform functions such as turning on and off the lighting fixture 301, charging the emergency power supply 11, and inspecting the emergency power supply 11. (1) A function of receiving power from the commercial power source 100 to cause the normal light emitter 12a to emit light and turn on the lighting fixture 301. (2) A normal charging function for receiving power from the commercial power source 100 and charging the emergency power source 11 normally. Here, the normal charging is performed by trickle charging, which supplies a minute current to the emergency power source 11 to charge it. (3) A timer function that measures the elapsed time that power is supplied from the commercial power source 100. (4) When the power supply from the commercial power source 100 is cut off, the power supply is switched to the power supply from the emergency power source 11, causing the emergency light emitter 12b to emit light, and turning on the lighting fixture 301. (5) An inspection function to check whether the lighting fixture 301 can be lit for a specified time by the emergency power supply 11 and to check the deterioration status of the emergency power supply 11. The specified time is, for example, 30 minutes or 60 minutes. Function (5) realizes the inspection function by illuminating the regular light source 12a or the emergency light source 12b. (6) An automatic inspection function that, when the inspection switch 5 is operated, causes the emergency light source 12b to emit light using the emergency power supply 11, thereby performing the inspection of function (5). (7) A periodic automatic inspection function that automatically performs the inspection of function (5) after a predetermined time interval has elapsed due to the timer function of function (3), by illuminating the normal light source 12a using the emergency power supply 11 without operating the inspection switch 5. The inspection by function (7) is performed for a predetermined specified time. (8) A manual inspection function that causes the emergency light source 12b to emit light using the emergency power supply 11 only while the inspection switch 5 is being operated, to check whether the lighting fixture 301 can be turned on. (9) A function of causing the notification unit 6 to notify the results of the inspections performed based on functions (5) to (7).

[0064] 13 is a diagram illustrating the operation modes of control unit 10C according to embodiment 2. Lighting device 301 can operate in four modes: (a) normal lighting mode, (b) emergency lighting mode, (c) manual inspection mode, and (d) automatic inspection mode.

[0065] In the normal lighting mode (a), as in function (1), the normal lighting device 330 lights up the normal light source unit 15a with power from the commercial power supply 100. The emergency light source unit 15b is in an off state.

[0066] In the emergency lighting mode (b), as in function (4), the emergency light source unit 15b is turned on by the lighting circuit 310A with power from the emergency power supply 11. The normal light source unit 15a is turned off.

[0067] The manual inspection mode (c) is a mode in which an inspection is performed with the operation of the inspection switch 5 by the administrator as the inspection start condition. In the manual inspection mode, the inspection processing unit 10D executes the automatic inspection function of function (6) or the manual inspection function of function (8) and issues a notification of function (9). As the manual inspection mode, both or only one of the automatic inspection function of function (6) and the manual inspection function of function (8) may be adopted. In the manual inspection mode, the normal lighting device 330 does not light the normal light emitter 12a, and the lighting circuit 330A lights the emergency light emitter 12b.

[0068] The automatic inspection mode (d) is a mode in which inspection is automatically performed when a predetermined time interval has elapsed as an inspection start condition. In the automatic inspection mode, the inspection processing unit 10D executes the periodic automatic inspection function of function (7).

[0069] FIG. 14 is a diagram illustrating the automatic inspection mode of a lighting fixture 901 according to a comparative example. As shown in FIG. 14(a), the lighting fixture 901 according to the comparative example turns on only the normal light source unit 15a in the normal lighting mode. Also, as shown in FIG. 15(b), the lighting fixture 901 according to the comparative example turns on only the emergency light source unit 15b in the emergency lighting mode and the automatic inspection mode. Therefore, when the lighting fixture 901 according to the comparative example switches to the automatic inspection mode, the normal light source unit 15a becomes dimmer than in the normal lighting mode, making the change in brightness more noticeable to the user. This may lead the user to mistakenly believe that there is a power outage or that there is a malfunction in the lighting fixture 901.

[0070] FIG. 15 is a diagram illustrating the automatic inspection mode of lighting fixture 301 according to the second embodiment. In the automatic inspection mode, normal lighting device 330 causes normal light emitter 12a to emit light, but does not emit light from emergency light emitter 12b. That is, as shown in FIG. 15(a), only normal light source unit 15a is lit in both normal lighting mode and automatic inspection mode. Also, as shown in FIG. 15(b), only emergency light source unit 15b is lit in both emergency lighting mode and manual inspection mode. In the case of an emergency lighting fixture, the specified time, which is the duration of lighting during automatic inspection, is, for example, 30 or 60 minutes.

[0071] In this manner, in the present embodiment, since normal light source unit 15a is turned on in both the normal lighting mode and the automatic inspection mode, it is difficult for the user to recognize that the automatic inspection mode is being executed, which prevents the user from mistakenly thinking that there is an abnormality or a power outage in lighting device 301.

[0072] Furthermore, in the automatic inspection mode, the normal light source unit 15a is lit with power from the commercial power source 100 and the emergency power source 11. At this time, the power supplied from the emergency power source 11 to the normal light source unit 15a is the same as the power supplied from the emergency power source 11 to the emergency light source unit 15b in the emergency lighting mode. That is, as in the first embodiment, in the automatic inspection mode, the emergency power source 11 supplies power equivalent to that in the emergency lighting mode, and the shortfall in power is supplied from the normal lighting device 330. Therefore, in the automatic inspection mode, inspection can be performed under the same conditions as in the emergency lighting mode, and the accuracy of the inspection can be improved.

[0073] The brightness of the regular light source unit 15a in the automatic inspection mode and the regular lighting mode does not have to be the same.

[0074] 16 is a circuit block diagram of lighting fixture 301 according to embodiment 2. In the normal lighting mode, normal constant current circuit 19 of normal lighting device 330 receives power from commercial power source 100 via an AC / DC circuit and outputs a normal lighting current. This causes normal light emitter 12a to perform normal lighting. The normal lighting current is detected by current detection resistor 21, and constant current control is performed by normal constant current circuit 19.

[0075] In the normal lighting mode, the charging circuit 10B of the control device 310 receives power from the commercial power supply 100 via the AC / DC circuit and the step-down circuit, and charges the emergency power supply 11. At this time, the charging switch 16 is conductive. The emergency switch 24 and the normal-side supply switch 25 are disconnected. The emergency constant current circuit 20 is stopped, and no emergency lighting current flows.

[0076] In the emergency lighting mode in which the commercial power supply 100 is cut off, the charging switch 16 is turned off to stop charging the emergency power supply 11, the normal constant current circuit 19 is stopped, and the emergency constant current circuit 20 is activated. At this time, the emergency switch 24 is conductive, the normal-side supply switch 25 is turned off, and an emergency lighting current is supplied to the emergency light emitter 12b. The emergency lighting current is detected by the emergency current detection resistor 22 and is constant-current controlled by the emergency constant current circuit 20. As in the first embodiment, in the emergency lighting mode, it is necessary to light the emergency light emitter 12b for at least a certain period of time using power supplied from the emergency power supply 11.

[0077] In the automatic inspection mode, the charging switch 16 is turned off while the commercial power source 100 is energized. Furthermore, the emergency constant current circuit 20 outputs an emergency lighting current using the power supplied from the emergency power source 11. At this time, the emergency switch 24 is turned off, the normal supply switch 25 is conductive, and the emergency constant current circuit 20 supplies the emergency lighting current to the normal light emitter 12a. Meanwhile, the normal constant current circuit 19 is also activated, and controls the current value of the current detection resistor 21 to be constant. Therefore, the normal lighting current is supplied to the normal light emitter 12a.

[0078] The normal lighting current is greater than the emergency lighting current. Therefore, the shortage of the emergency lighting current relative to the normal lighting current is supplied from the normal constant current circuit 19. As a result, the normal lighting current that is the same as that in the normal lighting mode before switching to the automatic inspection mode flows through the normal light emitter 12a, while the emergency lighting current that is the same as that in the emergency lighting mode flows from the emergency constant current circuit 20. Therefore, as in the first embodiment, the brightness is the same in the automatic inspection mode as in the normal lighting mode, and automatic inspection can be performed while minimizing any sense of discomfort felt by the user.

[0079] In addition, in this embodiment, the case where the normal light source unit 15a and the emergency light source unit 15b are separate has been described. However, the normal light source unit 15a and the emergency light source unit 15b may be provided as the same light source having the same light emitter 12. In this case, as in the first embodiment, the light emitter 12 emits light with the same luminance in both the normal lighting mode and the automatic inspection mode.

[0080] Embodiment 3 FIG. 17 is a circuit block diagram of a lighting fixture 401 according to embodiment 3. In this embodiment, the control of the emergency constant current circuit 20 differs from that in embodiment 1. In this embodiment, as in embodiment 1, in the automatic inspection mode, the normal constant current circuit 19 detects the sum of the currents from the normal constant current circuit 19 and the emergency constant current circuit 20 using a current detection resistor 21 and performs constant current control. Furthermore, the emergency constant current circuit 20 detects the current from the emergency constant current circuit 20 using an emergency current detection resistor 22 and performs constant current control. Therefore, the shortage of the emergency lighting current relative to the target current value of the normal constant current circuit 19 is supplied from the normal constant current circuit 19. Furthermore, in this embodiment, when the lighting fixture 401 transitions to the automatic inspection mode, the emergency constant current circuit 20 increases the current from the emergency constant current circuit 20 stepwise or continuously to the target value. When the lighting fixture 401 transitions to the automatic inspection mode, the emergency constant current circuit 20 may increase the current from the emergency constant current circuit 20 to the target value over a predetermined period of time.

[0081] 18 is a diagram illustrating the relationship between the normal lighting current and the emergency lighting current according to embodiment 3. In the automatic inspection mode, the normal constant current circuit 19 maintains the combined lighting current, which is the sum of the currents from the normal constant current circuit 19 and the emergency constant current circuit 20, at 100% output, which is the target current value. Therefore, after switching to the automatic inspection mode, if the emergency constant current circuit 20 increases the emergency lighting current, the normal lighting current will decrease by the amount of the increase in the emergency lighting current.

[0082] When the automatic inspection mode is switched to the normal operation mode, the emergency constant current circuit 20 reduces the emergency operation current stepwise or continuously, so that the normal operation current increases by the amount of the increase in the emergency operation current.

[0083] In this manner, in this embodiment, the brightness of the light source unit 15 changes gradually or in stages when the automatic inspection mode starts or ends, which allows automatic inspection to be performed without causing discomfort to the user.

[0084] Furthermore, both the normal constant current circuit 19 and the emergency constant current circuit 20 may be switching power supply circuits. In this case, when the operating frequencies of the normal constant current circuit 19 and the emergency constant current circuit 20 are f1 and f2, respectively, it is desirable that the difference frequency f1-f2 is higher than 20 kHz.

[0085] If the normal constant current circuit 19 and the emergency constant current circuit 20 are activated simultaneously during automatic inspection, a beat with a frequency of f1-f2 may occur. For this reason, the generation of noise can be suppressed by setting the difference frequency f1-f2 higher than 20 kHz, which is in the audible range.

[0086] In addition, a stabilizing capacitor C1 may be connected to the connection point between the normal constant current circuit 19 and the emergency constant current circuit 20. This makes it possible to further stabilize the control of both the normal constant current circuit 19 and the emergency constant current circuit 20.

[0087] Next, modified examples of each embodiment will be described. In embodiments 1 to 3, the emergency lighting current in the automatic inspection mode is controlled to be the same as the emergency lighting current in the emergency lighting mode. Here, the voltage of the light source that lights up in the normal lighting mode is usually higher than the voltage of the light source that lights up in the emergency lighting mode. For this reason, if the same current is passed through the light source in the automatic inspection mode and the emergency lighting mode, the power tends to be higher in the automatic inspection mode. For this reason, it is desirable to adjust the emergency lighting current in the automatic inspection mode so that the output power from the emergency power source 11, which is the original purpose, is the same as in the emergency lighting mode. Specifically, in the automatic inspection mode, it is sufficient to reduce the emergency lighting current by the amount of the increase in voltage.

[0088] In the first to third embodiments, the lighting current of the light emitter 12 during automatic inspection is controlled to be the same as that in the normal lighting mode. However, the current flowing through the light emitter may be different between the normal lighting mode and the automatic inspection mode. For example, if there is a margin in the output of the normal constant current circuit 19, if there is no limit to the lighting time provided by the emergency power supply 11, or if brightness is desired during inspection, a lighting current larger than that in the normal lighting mode may be passed in the automatic inspection mode as needed.

[0089] The control unit 10C may also have an emergency output mode in which the brightness of the light source unit is higher than in the normal lighting mode. In the emergency output mode, a current obtained by combining the currents from the normal constant current circuit 19 and the emergency constant current circuit 20 is supplied to the light source unit. In addition, in the emergency output mode, the normal constant current circuit 19 and the emergency constant current circuit 20 each output a current below their output limits. By lighting the light source unit with a current obtained by combining the currents from the normal constant current circuit 19 and the emergency constant current circuit 20, it is possible to realize an emergency output mode with high brightness while maintaining the outputs of the normal constant current circuit 19 and the emergency constant current circuit 20 below their output limits.

[0090] In the automatic inspection mode, the power supplied to the light source unit from the commercial power supply 100 and the power supplied to the light source unit from the emergency power supply 11 may be increased or decreased under control of the control unit 10C or the normal lighting device 330. This allows the brightness of the light source unit to be adjusted in the automatic inspection mode.

[0091] In addition, in the first to third embodiments, in the automatic inspection mode, the power supplied to the light source unit from the emergency power supply 11 is the same as in the emergency lighting mode, and the light source unit is lit by power from the commercial power supply 100 and the emergency power supply 11. Such control may also be performed in other inspection modes, such as function (6).

[0092] Furthermore, in the above-described first to third embodiments, the notification unit 6 has an LED and notifies the inspection result by emitting light in a certain color, blinking, etc. However, the notification unit 6 is not limited to this and may be capable of notifying the status of the lighting fixture, such as the result of the inspection operation. For example, the notification unit 6 may notify by a segment display, or may have a liquid crystal monitor or the like and display information using characters, pictures, etc.

[0093] Various aspects of the present disclosure are summarized below as appendices. (Appendix 1) A light source unit; a lighting circuit that supplies power to the light source unit from a commercial power source or an emergency power source to light the light source unit; a control unit that controls the lighting circuit; Equipped with The control unit a normal lighting mode in which the light source unit is lit by power from the commercial power source; an emergency lighting mode in which the light source unit is turned on with power from the emergency power source in an emergency; a check mode for checking the emergency power supply; and In the inspection mode, the power supplied from the emergency power source to the light source unit is the same as that in the emergency lighting mode, and the light source unit is lit by power from the commercial power source and the emergency power source. (Appendix 2) 2. The lighting fixture according to claim 1, wherein in the inspection mode, the power supplied to the light source unit is the same as in the normal lighting mode. (Appendix 3) 3. The lighting fixture according to claim 1, wherein in the inspection mode, the luminance of the light source unit is the same as in the normal lighting mode. (Appendix 4) The light source unit has a normal light source unit and an emergency light source unit, In the normal lighting mode, the normal light source unit is lit by power from the commercial power source, In the emergency lighting mode, the emergency light source unit is turned on by power from the emergency power supply, 4. The lighting fixture according to claim 1, wherein in the inspection mode, the normal light source unit is lit by power from the commercial power source and the emergency power source. (Appendix 5) 5. The lighting fixture according to claim 1, wherein in the inspection mode, the control unit causes the light source unit to emit light using power from the emergency power source at predetermined time intervals for a predetermined period of time. (Appendix 6) 6. The lighting device according to claim 5, wherein the time interval between inspection modes is six months or more. (Appendix 7) 6. The lighting fixture of claim 5, wherein the predetermined time period for the inspection mode is 60 minutes or less. (Appendix 8) the lighting circuit includes a normal constant current circuit that supplies a constant current from the commercial power supply to the light source unit in the normal lighting mode, and an emergency constant current circuit that supplies a constant current from the emergency power supply to the light source unit in the emergency lighting mode, The lighting fixture according to any one of claims 1 to 7, characterized in that in the inspection mode, a current that is the sum of the currents from the normal constant current circuit and the emergency constant current circuit is supplied to the light source unit. (Appendix 9) The lighting fixture described in Appendix 8, characterized in that in the inspection mode, the normal constant current circuit performs constant current control on the combined current, and the emergency constant current circuit performs constant current control on the current from the emergency constant current circuit. (Appendix 10) The lighting fixture described in Appendix 8, characterized in that in the inspection mode, the normal constant current circuit performs constant current control on the combined current, and the emergency constant current circuit increases the current from the emergency constant current circuit stepwise or continuously to a target value. (Appendix 11) the normal constant current circuit and the emergency constant current circuit are both switching power supply circuits, 11. The lighting fixture according to any one of claims 8 to 10, wherein a difference frequency between the operating frequencies of the normal constant current circuit and the emergency constant current circuit is higher than 20 kHz. (Appendix 12) 12. The lighting fixture according to any one of claims 8 to 11, further comprising a stabilizing capacitor connected to a connection point between the normal constant current circuit and the emergency constant current circuit. (Appendix 13) the control unit has an emergency output mode in which the luminance of the light source unit is higher than that of the normal lighting mode, 13. The lighting fixture according to any one of claims 8 to 12, wherein in the emergency output mode, a current obtained by combining currents from the normal constant current circuit and the emergency constant current circuit is supplied to the light source unit, and the normal constant current circuit and the emergency constant current circuit each output a current that is equal to or less than its output limit. (Appendix 14) Equipped with an inspection switch, The lighting fixture according to any one of appendixes 1 to 13, wherein the control unit has a manual inspection mode in which the light source unit is turned on using power from the emergency power source when the inspection switch is operated. (Appendix 15) 15. The lighting fixture according to any one of claims 1 to 14, further comprising a notification unit that notifies the user that an inspection operation is in progress or that an inspection result has been obtained. (Appendix 16) 16. The lighting fixture according to claim 1, wherein the emergency power source is a storage battery. [Explanation of symbols]

[0094] 1 lighting fixture, 2 main body, 3 display unit, 5 inspection switch, 6 alarm unit, 10 control device, 10A lighting circuit, 10B charging circuit, 10C control unit, 10D inspection processing unit, 10E timing unit, 11 emergency power supply, 12 light-emitting body, 12a normal light-emitting body, 12b emergency light-emitting body, 13 mounting board, 13a mounting board, 13b mounting board, 15 light source unit, 15a normal light source unit, 15b emergency light source unit, 16 charging switch, 17 normal switch, 18 emergency switch, 19 normal constant current circuit, 20 emergency constant current circuit, 21 current detection resistor, 22 Emergency current detection resistor, 23 Normal current detection resistor, 24 Emergency switch, 25 Normal side supply switch, 30 Normal lighting device, 100 Commercial power supply, 201 Lighting fixture, 210A lighting circuit, 301 Lighting fixture, 302 Main body, 310 Control device, 310A lighting circuit, 330 Normal lighting device, 330A lighting circuit, 401 Lighting fixture, 801 Lighting fixture, 803 Display unit, 810 Control device, 810A lighting circuit, 901 Lighting fixture, C1 Stabilization capacitor

Claims

1. A light source unit; a lighting circuit that supplies power from a commercial power source or an emergency power source to the light source unit to light the light source unit; A control unit for controlling the lighting circuit; Equipped with The control unit is a normal lighting mode in which the light source unit is lit by power from the commercial power source; an emergency lighting mode in which the light source unit is turned on by power from the emergency power source in an emergency; a check mode for checking the emergency power supply; having The lighting fixture is characterized in that, in the inspection mode, the power supplied from the emergency power source to the light source unit is the same as that in the emergency lighting mode, and the light source unit is lit by power from the commercial power source and the emergency power source.

2. 2. The lighting fixture according to claim 1, wherein in the inspection mode, the power supplied to the light source unit is the same as that in the normal lighting mode.

3. 3. The lighting fixture according to claim 1, wherein in the inspection mode, the luminance of the light source unit is the same as that in the normal lighting mode.

4. The light source unit has a normal light source unit and an emergency light source unit, In the normal lighting mode, the normal light source unit is lit by power from the commercial power source, In the emergency lighting mode, the emergency light source unit is turned on by power from the emergency power source, 3. The lighting fixture according to claim 1, wherein in the inspection mode, the normal light source unit is turned on by power from the commercial power source and the emergency power source.

5. 3. The lighting fixture according to claim 1, wherein in the inspection mode, the control unit causes the light source unit to emit light using power from the emergency power source at predetermined time intervals for a predetermined period of time.

6. 6. The lighting fixture according to claim 5, wherein the time interval between the inspection modes is six months or more.

7. 6. The lighting fixture of claim 5, wherein the predetermined time period for the inspection mode is 60 minutes or less.

8. The lighting circuit includes a normal constant current circuit that supplies a constant current from the commercial power source to the light source unit in the normal lighting mode, and an emergency constant current circuit that supplies a constant current from the emergency power source to the light source unit in the emergency lighting mode, 3. The lighting fixture according to claim 1, wherein in the inspection mode, a current obtained by combining currents from the normal constant current circuit and the emergency constant current circuit is supplied to the light source unit.

9. 9. The lighting fixture according to claim 8, wherein in the inspection mode, the normal constant current circuit performs constant current control on the combined current, and the emergency constant current circuit performs constant current control on the current from the emergency constant current circuit.

10. The lighting fixture described in claim 8, characterized in that in the inspection mode, the normal constant current circuit controls the combined current to a constant current, and the emergency constant current circuit increases the current from the emergency constant current circuit stepwise or continuously to a target value.

11. The normal constant current circuit and the emergency constant current circuit are both switching power supply circuits, 9. The lighting fixture according to claim 8, wherein a difference frequency between the operating frequencies of the normal constant current circuit and the emergency constant current circuit is higher than 20 kHz.

12. 9. The lighting fixture according to claim 8, further comprising a stabilizing capacitor connected to a connection point between the normal constant current circuit and the emergency constant current circuit.

13. The control unit has an emergency output mode in which the luminance of the light source unit is higher than that of the normal lighting mode, The lighting fixture described in claim 8, characterized in that in the emergency output mode, a current obtained by combining currents from the normal constant current circuit and the emergency constant current circuit is supplied to the light source unit, and the normal constant current circuit and the emergency constant current circuit each output a current below their output limit.

14. Equipped with an inspection switch, 3. The lighting fixture according to claim 1, wherein the control unit has a manual inspection mode in which the light source unit is turned on with power from the emergency power source when the inspection switch is operated.

15. 3. The lighting fixture according to claim 1, further comprising a notification unit that notifies the user that an inspection operation is in progress or that an inspection result is obtained.

16. 3. The lighting fixture according to claim 1, wherein the emergency power source is a storage battery.

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