JP2013118203A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of connecting a cable connected with a lighting-up unit with connectors arranged at a light source section from a direction orthogonal to a light emitting surface of a display section.SOLUTION: The lighting-up unit connected with the cable is stored in a body of the lighting device. The body has an opening at a lower face. The light source section 14 has a light source. The display section has a light emitting surface for emitting light irradiated from the light source. The connectors 40, 41 are arranged on the light source section 14. The cables are connected with the connectors 40, 41 from a direction orthogonal to the light emitting surface of the display section. A body cover has an insertion hole inserted with the display section. The display section is supported at a peripheral edge of the insertion hole by locking at least a part of the display section. The body cover is mounted so as to cover the opening of the body.

Description

  The present invention relates to a lighting device. The present invention particularly relates to an indicator lamp such as a guide lamp.

  Conventionally, induction lamps using a cold cathode lamp as a light source have been mainly used. Considering the influence of heat on the lamp, the lamp holding member is made of resin so that the influence of heat from the outside is not given to the lamp. It is common (see, for example, Patent Document 1).

JP 2002-170411 A JP 2005-38771 A Japanese Utility Model Publication No. 62-88315

  Recently, the use of LEDs as an environment-friendly light source such as mercury-free and low power consumption has been increasing, but heat generation is a problem because it generates a large amount of heat and is easily affected by heat. However, since the conventional guide light has a configuration mainly intended to shield heat from the outside, it is difficult to efficiently dissipate heat to the outside when an LED is used as the light source.

  An object of the present invention is to connect a cable connected to a lighting unit in a lighting device to a connector provided in a light source unit from a direction orthogonal to an emission surface of a display unit.

A lighting device according to one embodiment of the present invention includes:
A lighting unit to which a cable is connected is stored, and a main body having an opening on the lower surface;
A light source unit having a light source;
A display unit having an exit surface from which light emitted from the light source exits;
A connector provided in the light source unit, to which the cable is connected from a direction orthogonal to the emission surface of the display unit;
The display unit has an insertion port, and at least a part of the display unit is locked to the periphery of the insertion port to support the display unit, and is attached so as to cover the opening of the main body. A main body cover.

  According to one aspect of the present invention, in the lighting device, the cable connected to the lighting unit can be connected to the connector provided in the light source unit from the direction orthogonal to the emission surface of the display unit.

It is a top view, a left side view, a front view, a right side view, and a bottom view of the guide lamp according to Embodiment 1 of the present invention. It is a disassembled perspective view of the guide light which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the guide light which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the guide light which concerns on Embodiment 1 of this invention. It is AA sectional drawing of FIG. 1 in Embodiment 1 of this invention. It is the perspective view of the main body cover of the guide light which concerns on Embodiment 1 of this invention, and an exploded perspective view. It is a perspective view, a front view, a left side view, a bottom view, and a rear view of the light source part of the guide lamp according to Embodiment 1 of the present invention. It is a disassembled perspective view of the light source part of the guide light which concerns on Embodiment 1 of this invention. It is a disassembled perspective view of the guide light which concerns on Embodiment 2 of this invention. It is AA sectional drawing of FIG. 1 in Embodiment 2 of this invention. It is a perspective view, a rear view, a left side view, a bottom view, and a front view of a light source part of a guide lamp according to a third embodiment of the present invention. It is a disassembled perspective view of the light source part of the guide light which concerns on Embodiment 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1A is a top view of the guide lamp 10 according to the present embodiment, FIG. 1B is a left side view of the guide lamp 10, FIG. 1C is a front view of the guide lamp 10, and FIG. ) Is a right side view of the guide light 10, and FIG. 1E is a bottom view of the guide light 10.

  The guide lamp 10 mainly includes a main body 11, a main body cover 12, and a display unit 13. The guide light 10 is one specific example of an indicator light in which the main body 11 is embedded in the ceiling. The detailed configuration of the guide light 10 will be described later.

  2A, 2B, 3 and 4 are exploded perspective views of the guide lamp 10. FIG.

  FIG. 2A is a view of the guide light 10 in a state in which the main body cover 12 and the display unit 13 are removed from the main body 11 as viewed obliquely from the upper front. FIG.2 (b) is the figure which looked at the guide light 10 of the same state from diagonally backward upper direction.

  The display unit 13 to which the light source unit 14 is attached is held so as to ride on the main body cover 12. The main body cover 12 and the display unit 13 are attached to the main body 11 by a spring 15. The main body cover 12 radiates the heat of the light source unit 14 to the outside of the main body 11. Thus, the guide lamp 10 according to the present embodiment is characterized in that the heat of the light source unit 14 is radiated through the main body cover 12 on the lower surface of the appliance.

  FIG. 3 is a view of the guide lamp 10 as viewed from the upper front side in a state where the light source unit 14 is further removed from the display unit 13 in the state of FIG. In FIG. 3, the main body 11 is omitted.

  FIG. 4 is a view of the guide light 10 in a state where the main body cover 12 and the display unit 13 are further separated in the state of FIG.

  FIG. 5 is a cross-sectional view taken along the line AA in FIG. In FIG. 5, a part of the main body 11 and the display unit 13 is omitted.

  The heat radiating plates 16 and 17 (an example of a heat conducting member) attached to the main body cover 12 are disposed at a position where they contact the light source unit 14 attached to the display unit 13. Thus, the guide lamp 10 according to the present embodiment is characterized in that the light source unit 14 and the main body cover 12 are connected by the heat conducting member.

  Hereinafter, the main body 11 will be described.

  The main body 11 attached to the ceiling is formed in a box shape with a sheet metal, and includes a mounting hole 18 (attached part), a power supply insertion hole 19, a rib 20, a spring mounting part 21, and a convex part 22 (FIG. 1, FIG. 2, see FIG. Inside the main body 11, a power terminal block 23 (power connection portion), a storage battery 24, a lighting unit 25, and an inspection switch portion 26 are attached (see FIG. 4).

  Although not shown, an embedding hole is provided in the ceiling to which the main body 11 is attached, and a bolt for fixing the main body 11 is attached to the back of the ceiling. In addition, power lines and ground lines are installed behind the ceiling. When the main body 11 is attached to the ceiling, the main body 11 is embedded in the embedding hole, and a bolt is inserted into the attachment hole 18 and fixed by tightening with a nut or the like. Further, a power line or a ground line is drawn into the inside of the main body 11 from the power insertion hole 19 and connected to the power terminal block 23. A protective bush is attached to the power supply insertion hole 19 in order to protect the power supply line and the ground line.

  Although not shown, a fall prevention string is attached to the display unit 13. When attaching the main body cover 12 and the display unit 13 to the main body 11, the spring 15 is attached to the spring attachment portion 21 after hooking the fall prevention string on the rib 20.

  The convex portion 22 is provided in order to avoid contact between the protruding portions of the storage battery 24 and the lighting unit 25 attached to the inside of the main body 11 and the peripheral wall of the main body 11. The storage battery 24 is charged by a commercial power supply via the power terminal block 23 and the lighting unit 25. The lighting unit 25 is normally powered by the commercial power supply via the power terminal block 23 to light the LED 27 (an example of the light source) of the light source unit 14, and is fed by the storage battery 24 in an emergency (when the commercial power supply fails). Then, the LED 27 of the light source unit 14 is turned on. The lighting unit 25 includes a control unit such as a microcomputer. The lighting unit 25 monitors the state of the LED 27 and the storage battery 24 by the control unit. The inspection switch unit 26 includes a monitor lamp (for example, LED), an inspection switch, and a remote control signal light receiving unit. The inspection switch unit 26 displays the state of the LED 27 and the storage battery 24 monitored by the control unit of the lighting unit 25 with a monitor lamp (for example, if the LED 27 and the storage battery 24 are operating normally, the corresponding monitor lamp If the LED 27 and the storage battery 24 are at the end of their lifetime, the corresponding monitor lamps are blinked). The control unit of the lighting unit 25 has a function of automatically checking the storage battery 24. For example, when the inspection switch of the inspection switch unit 26 is pressed and held for a long time, the control unit of the lighting unit 25 forcibly or artificially cuts off the commercial power supply and lights the LED 27 for a predetermined time with the power of the storage battery 24. If the voltage of the storage battery 24 is equal to or higher than the specified voltage, it is determined that the storage battery 24 is in a normal state. On the other hand, when the voltage of the storage battery 24 becomes lower than the specified voltage at that time (or when the voltage of the storage battery 24 becomes lower than the specified voltage before the predetermined time elapses), the storage battery 24 is in an abnormal state. to decide. This judgment result is displayed by a monitor lamp. The inspection switch unit 26 does not perform the above inspection unless a predetermined time (for example, 24 hours) has elapsed since the start of charging the storage battery 24. This is because an accurate inspection result cannot be obtained even if the storage battery 24 is inspected when the storage battery 24 is not sufficiently charged. The inspection switch unit 26 has a function of receiving various signals from the remote controller by the remote control signal light receiving unit. For example, the remote control signal light receiving unit of the inspection switch unit 26 receives an inspection start signal for automatically inspecting the storage battery 24. With this function, the storage battery 24 can be automatically inspected without pressing the inspection switch of the inspection switch unit 26. In addition to the inspection start signal, the remote control signal light receiving unit may receive a specific function signal such as a confirmation signal for confirming whether the storage battery 24 can be automatically inspected.

  In addition, the main body 11 may be formed in shapes (for example, cylinder shape) other than box shape. Moreover, the main body 11 may be provided with a heat radiating hole. The peripheral wall of the main body 11 is provided with a convex portion 22 in order to avoid contact with protruding parts such as the storage battery 24 and the lighting unit 25 attached inside the main body 11. It is good also as a heat dissipation hole. In this case, the protruding portions of the storage battery 24, the lighting unit 25, and the like protrude from the heat radiation hole to the outside of the main body 11, so that contact with the peripheral wall of the main body 11 can be avoided as in the case where the convex portion 22 is present.

  As a modification of the present embodiment, the main body 11 may be attached to a wall or floor instead of the ceiling. That is, the main body 11 may be embedded in an embedding hole provided on the wall or floor. In this case, the guide light 10 is the one shown in each drawing rotated 90 degrees to the left or right or upside down, and the main body cover 12 and the display unit 13 are not on the lower side of the main body 11 but on either the left or right side of the main body 11. It is attached to one side or the upper side.

  The light source unit 14 configured by attaching the two substrates 28 and 29 on which the LEDs 27 are mounted to a lamp holder 30 made of an aluminum alloy (for example, A1050, A5052, and A6063) is provided inside the main body 11 together with a part of the display unit 13. (See FIGS. 2 to 5). Details of the light source unit 14 will be described later.

  6A and 6B are perspective views of the main body cover 12, and FIG. 6C is an exploded perspective view of the main body cover 12. 6 (a) and 6 (c) are views of the main body cover 12 as viewed obliquely from behind and above. FIG. 6B is a view of the main body cover 12 as viewed obliquely from above and front.

  Hereinafter, the main body cover 12 will be described.

  The main body cover 12 has substantially the same size as the main body 11 and is attached to the lower side of the main body 11 (see FIGS. 1 and 2). Reinforcing metal fittings 31 (reinforcing plates) are spot welded to the main body cover 12, and springs 15 and heat radiating plates 16 and 17 are attached to the reinforcing metal fittings 31 (see FIGS. 2 to 6). As described above, when the main body cover 12 is attached to the main body 11, the spring 15 is attached to the spring attachment portion 21 of the main body 11. The heat radiating plate 16 is fixed to the front surface side of the reinforcing bracket 31 with screws 32, and thermally connects the light source unit 14 and the reinforcing bracket 31 (see FIGS. 2, 3, 5, and 6). The heat radiating plate 17 is attached to the rear surface side of the reinforcing bracket 31 with a knob screw 33 so that the product dimensional error of the guide lamp 10 can be corrected (that is, the degree of contact with the light source unit 14 can be adjusted). And the reinforcing metal fitting 31 are thermally connected (see FIGS. 2 to 6). The heat sinks 16 and 17 are made of an aluminum alloy (for example, A1050, A5052, and A6063) and have high thermal conductivity. The main body cover 12 and the reinforcing metal fitting 31 are also formed of SPCC (cold rolled steel plate), for example, and have thermal conductivity. In order to increase thermal radiation, the body cover 12 and the reinforcing bracket 31 are painted white. The white coating is further advantageous in that the design of the main body cover 12 and the reinforcing bracket 31 is improved.

  As described above, the guide light 10 according to the present embodiment is characterized in that a reinforcing plate is attached to the main body cover 12. Further, the reinforcing plate attached to the main body cover 12 and the light source unit 14 are connected by a heat conducting member. Furthermore, the main body cover 12 is a metal painted in white.

  Hereinafter, the display unit 13 will be described.

  The display unit 13 includes light guide plates 34 and 35, display plates 36 and 37, and a display plate case 38 (see FIGS. 1 to 5).

  The light guide plates 34 and 35 are formed of a transparent resin such as PMMA (polymethyl methacrylate resin) or PC (polycarbonate resin). Although not shown, a sheet-like reflecting member such as a PET (polyethylene terephthalate) film is disposed on the back surfaces of the light guide plates 34 and 35, and light emitted from the LED 27 of the light source unit 14 is reflected by the reflecting member. Reflected in the direction of the display plates 36 and 37. In addition, a condensing sheet made of a diffusion sheet, a prism sheet, or the like is disposed on the surfaces of the light guide plates 34 and 35. The display plates 36 and 37 are made of a transparent resin such as PMMA or PC or a white translucent resin. Arbitrary display contents are printed on the surfaces of the display boards 36 and 37. In the present embodiment, a symbol for guiding an evacuee in an emergency is displayed (see FIGS. 1 to 4). The display plate case 38 has a structure in which the light guide plates 34 and 35 and the display plates 36 and 37 can be fitted from above, and the light source unit 14 can be held on the upper portion (see FIGS. 3 to 5). . Moreover, the display board case 38 comprises the string attachment hole 39 (refer FIGS. 2-4). A fall prevention string is attached to the string attachment hole 39.

  As described above, the guide light 10 according to the present embodiment is characterized in that the display unit 13 is provided with a plurality of display surfaces. In addition, the display unit 13 performs guidance display.

  7 (a) and 7 (b) are perspective views of the light source unit 14, FIG. 7 (c) is a front view of the light source unit 14, FIG. 7 (d) is a left side view of the light source unit 14, and FIG. ) Is a bottom view of the light source unit 14, and FIG. 7F is a rear view of the light source unit 14. FIG. 8 is an exploded perspective view of the light source unit 14. FIG. 7A is a view of the light source unit 14 as viewed obliquely from above and front. FIG. 7B is a view of the light source unit 14 as viewed obliquely from behind and above. FIG. 7F is a view of the light source unit 14 in an upside down state as viewed from behind. FIG. 8 is a view of the light source unit 14 in the same state as viewed obliquely from above and front.

  Hereinafter, the light source unit 14 will be described.

  The light source unit 14 includes a pair of substrates 28 and 29 (LED array) and a lamp holder 30 (see FIGS. 5, 7, and 8). Two or more LEDs 27 are mounted on each of the substrates 28 and 29. Connectors 40 and 41 are attached to the boards 28 and 29, and are connected to the lighting unit 25 of the main body 11 by cables. The LEDs 27 mounted on the boards 28 and 29 are controlled to be lit by the lighting unit 25 via the connectors 40 and 41. The substrates 28 and 29 are disposed to face the lamp holder 30. A heat conductive sheet 42 and an insulating plate 43 are disposed under the substrates 28 and 29, and are fixed to the lamp holder 30 with screws 44 together with the substrates 28 and 29.

  As described above, the guide light 10 according to the present embodiment is characterized in that the light source is the LED 27. In addition, at least two LEDs 27 are mounted on the substrate 28 (or the substrate 29). Further, the light source unit 14 is characterized in that at least two substrates 28 and 29 are used. The guide lamp 10 according to the present embodiment is characterized in that the LED arrays used in the light source unit 14 have the same shape. In addition, the light source unit 14 uses two LED arrays having the same shape and is arranged so as to face each other.

  As described above, the guide lamp 10 according to the present embodiment includes the main body 11, the main body cover 12, the display unit 13, the light source unit 14, and the heat radiating unit. Light guide plates 34 and 35 and display plates 36 and 37 are attached to the display unit 13. The heat radiating portion is mainly composed of heat radiating plates 16 and 17.

  The main body 11 has an opening surface. The main body 11 is embedded in the ceiling (or wall or floor) so that the opening surface is exposed. For example, in FIG. 4, the lower surface of the main body 11 corresponds to an opening surface. The main body cover 12 is attached to the main body 11 so as to cover the opening surface of the main body 11. An opening 45 is provided in a part of the main body cover 12. The light guide plates 34 and 35 have an entrance surface and an exit surface. The incident surface receives light. The exit surface emits light incident from the entrance surface. For example, in FIG. 5, the upper surface of the light guide plate 34 corresponds to the incident surface, and the surface of the light guide plate 34 (the surface facing the display plate 36) corresponds to the emission surface. Similarly, for example, in FIG. 5, the upper surface of the light guide plate 35 corresponds to the incident surface, and the surface of the light guide plate 35 (the surface facing the display plate 37) corresponds to the emission surface. The display unit 13 protrudes from the opening 45 of the main body cover 12 such that the incident surfaces of the light guide plates 34 and 35 are located inside the main body 11 and the emission surfaces of the light guide plates 34 and 35 are located outside the main body 11. And attached to the main body 11. The light source unit 14 is attached to the inside of the main body 11 so as to face the incident surfaces of the light guide plates 34 and 35, and irradiates light to the outside of the main body 11 through the light guide plates 34 and 35. The display plates 36 and 37 are installed on the emission surfaces of the light guide plates 34 and 35, and display at least one of characters and symbols by light emitted from the emission surfaces of the light guide plates 34 and 35. That is, the display plates 36 and 37 display characters and designs using light that the light source unit 14 intends to irradiate outside the main body 11 through the light guide plates 34 and 35. The heat radiating unit contacts the light source unit 14, conducts heat generated from the light source unit 14 to the main body cover 12, and radiates the heat to the outside of the main body 11.

  According to the present embodiment, since the guide light 10 can efficiently dissipate heat to the outside by adopting the above-described configuration, the light source life is improved and the light output is more efficient. . In addition, this Embodiment is applicable also to illuminating devices other than the guide light 10, if the above structures are employ | adopted. In the present embodiment, the guide lamp 10 includes the display plates 36 and 37. However, the present embodiment can be applied to a lighting device that does not include the display plates 36 and 37.

  For example, as shown in FIG. 5, the heat radiating portion includes a reinforcing metal fitting 31 (an example of a reinforcing member) in addition to the heat radiating plates 16 and 17. The reinforcing metal fitting 31 is disposed inside the main body cover 12 along the periphery of the opening 45. One end of the heat radiating plates 16, 17 is fixed to the reinforcing bracket 31, and the other end of the heat radiating plates 16, 17 is pressed against the light source unit 14. The heat radiating plates 16 and 17 conduct heat generated from the light source unit 14 to the reinforcing bracket 31. The reinforcing bracket 31 radiates heat conducted from the heat sinks 16 and 17 to the outside of the main body 11 via the main body cover 12.

  Thus, in the present embodiment, the heat generated from the light source unit 14 is radiated from the main body cover 12 via the heat radiating plates 16 and 17. As a result of the experiment, the temperature of the light source unit 14 was 85 ° C. in the state in which the heat radiating plates 16 and 17 were not provided and the light source unit 14 was merely disposed inside the main body 11. On the other hand, in the state where the heat sinks 16 and 17 were installed, the temperature of the light source unit 14 was 60 ° C. due to heat radiation from the main body cover 12. As described above, the temperature of the light source unit 14 is decreased, so that the thermal influence on each component arranged around is reduced. Moreover, since the lifetime of the LED 27 tends to depend on the temperature, the lifetime of the LED 27 can be improved by decreasing the temperature of the light source unit 14. Further, since the light output of the LED 27 tends to decrease as the temperature increases, the light output of the LED 27 can be made more efficient by decreasing the temperature of the light source unit 14.

  For example, as shown in FIG. 5, the light exit surface of the light guide plate 34 (example of the first light guide plate) and the light exit surface of the light guide plate 35 (second light guide plate) face substantially opposite directions. The light source unit 14 includes a lamp holder 30 (an example of a holding member) that holds the two substrates 28 and 29 on which the LEDs 27 are mounted and the two substrates 28 and 29. The substrate 28 (an example of the first substrate) is attached to the inside of the main body 11 so that the surface on which the LEDs 27 are mounted faces the incident surface of the light guide plate 34. The LED 27 mounted on the substrate 28 irradiates light to the outside of the main body 11 through the light guide plate 34. The substrate 29 (second substrate) is attached to the inside of the main body 11 so that the surface on which the LEDs 27 are mounted faces the incident surface of the light guide plate 35. The LED 27 mounted on the substrate 29 irradiates light to the outside of the main body 11 via the light guide plate 35. The heat radiating part comes into contact with the lamp holder 30, conducts heat generated from the light source part 14 from the lamp holder 30 to the main body cover 12, and radiates the heat to the outside of the main body 11.

  The two substrates 28 and 29 have the same shape and are arranged symmetrically in the lamp holder 30.

  As described above, in the present embodiment, since the substrates 28 and 29 on which a plurality of LEDs 27 are mounted are arranged to face each other, when producing an indicator lamp having a plurality of display plates 36 and 37, one display plate 36 is provided. It is possible to reduce the thickness of the display unit 13 while using the same substrate as the indicator lamp having (the substrate can be newly produced, but costs are increased or parts inventory management is required. There are disadvantages such as).

  Moreover, according to this Embodiment, since the main body cover 12 is painted white, the emissivity improves, the heat dissipation effect can be increased, and the design can be improved.

Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  In the first embodiment, the display unit 13 is held by the main body cover 12 and is attached to the main body 11 integrally with the main body cover 12 by the spring 15. However, in the present embodiment, the display unit 13 is the main body cover 12. 11 is attached directly. As in the first embodiment, the main body cover 12 is attached to the main body 11 by a spring 15.

  FIG. 9 is an exploded perspective view of the guide light 10. FIG. 9 is a view of the guide light 10 with the main body cover 12 removed from the main body 11 as viewed obliquely from the lower front.

  The display unit 13 to which the light source unit 14 is attached is attached to the main body 11 by engaging the left and right protruding portions of the display plate case 38 with a case attaching portion 46 provided on the main body 11.

  10 is a cross-sectional view taken along the line AA of FIG. In FIG. 10, a part of the main body 11 and the display unit 13 is omitted.

  The heat sinks 16 and 17 attached to the main body cover 12 are provided with elastic deformation portions 47 and 48. When the main body cover 12 is further attached to the main body 11 to which the display unit 13 is attached, the elastically deforming parts 48 and 49 of the heat radiating plates 16 and 17 are elastically deformed and come into contact with the light source unit 14 attached to the display unit 13. . Thereby, the heat sinks 16 and 17 thermally connect the light source unit 14 and the reinforcing bracket 31 as in the first embodiment. Therefore, also in the present embodiment, the heat generated from the light source unit 14 is conducted from the heat radiating plates 16 and 17 to the reinforcing bracket 31, and further conducted from the reinforcing bracket 31 to the main body cover 12 to be radiated to the outside of the main body 11. . Therefore, the same effect as in the first embodiment is obtained.

Embodiment 3 FIG.
The difference between the present embodiment and the first and second embodiments will be mainly described.

  In the first and second embodiments, the light guide plates 34 and 35 and the display plates 36 and 37 are arranged on both surfaces of the display unit 13 of the guide lamp 10. However, in this embodiment, the light guide plates 34 and 35 are guided only on one surface of the display unit 13. A light plate 34 and a display plate 36 are arranged. In the present embodiment, the heat radiating plate 17 is not used, and only the heat radiating plate 16 on one side is used. However, the structure using both the heat radiating plates 16 and 17 may be used as in the first embodiment.

  11 (a) and 11 (b) are perspective views of the light source unit 14, FIG. 11 (c) is a rear view of the light source unit 14, FIG. 11 (d) is a left side view of the light source unit 14, and FIG. ) Is a bottom view of the light source unit 14, and FIG. 11F is a front view of the light source unit 14. FIG. 12 is an exploded perspective view of the light source unit 14. In addition, Fig.11 (a) is the figure which looked at the light source part 14 from diagonally forward upper direction. FIG. 11B is a view of the light source unit 14 in an upside down state as viewed obliquely from behind and above. FIG. 12 is a view of the light source unit 14 in the same state as viewed obliquely from behind and above.

  Hereinafter, the light source unit 14 will be described.

  The light source unit 14 includes a substrate 28 (LED array) and a lamp holder 30 (see FIGS. 11 and 12). Two or more LEDs 27 are mounted on the substrate 28. A connector 40 is attached to the substrate 28 and is connected to the lighting unit 25 of the main body 11 with a cable. The LED 27 mounted on the substrate 28 is controlled to be lit by the lighting unit 25 via the connector 40. A heat conductive sheet 42 and an insulating plate 43 are disposed under the substrate 28, and are fixed to the lamp holder 30 with screws 44 together with the substrate 28.

  Also in this embodiment, the same effects as those of the first and second embodiments are obtained.

  Hereinafter, the characteristics of the lighting device according to the embodiment of the present invention will be described again.

The lighting device in the embodiment of the present invention is:
A main body embedded in one of the ceiling, wall, and floor so that the opening surface is exposed;
A body cover that is partially provided with an opening and covers the opening surface of the body;
A light guide plate having an incident surface for incident light and an output surface for emitting light incident from the incident surface;
The light guide plate is attached, protruded from the opening of the body cover so that the incident surface of the light guide plate is located inside the body, and the exit surface of the light guide plate is located outside the body. A main body cover or a display unit attached to the main body;
A light source unit that is attached to the inside of the main body so as to face the incident surface of the light guide plate, and irradiates light to the outside of the main body through the light guide plate;
A heat dissipating part that contacts the light source part and conducts heat generated from the light source part to the main body cover to dissipate heat to the outside of the main body;

The heat radiating portion includes a reinforcing member disposed inside the main body cover along the periphery of the opening, one end fixed to the reinforcing member, and the other end pressed against the light source unit. Heat sink and
The heat sink conducts heat generated from the light source part to the reinforcing member,
The reinforcing member radiates heat conducted from the heat radiating plate to the outside of the main body through the main body cover.

The illuminating device includes two light guide plates, and an output surface of the first light guide plate which is one of the two light guide plates and an output surface of the second light guide plate which is the other of the two light guide plates are mutually connected. Facing the opposite direction,
The light source unit includes two substrates on which LEDs are mounted, and a holding member that holds the two substrates.
The first substrate, which is one of the two substrates, is attached to the inside of the main body so that the surface on which the LEDs are mounted faces the incident surface of the first light guide plate,
The LED mounted on the first substrate irradiates light to the outside of the main body through the first light guide plate,
The second substrate, which is the other of the two substrates, is attached to the inside of the main body so that the surface on which the LED is mounted faces the incident surface of the second light guide plate,
The LED mounted on the second substrate irradiates light outside the main body through the second light guide plate,
The heat dissipating part contacts the holding member, conducts heat generated from the light source part from the holding member to the main body cover, and dissipates heat to the outside of the main body.

  The first substrate and the second substrate both have the same shape and are arranged symmetrically with respect to the holding member.

  The display unit is further provided with a display plate that is installed on the exit surface of the light guide plate and displays at least one of characters and symbols by light emitted from the exit surface of the light guide plate.

  DESCRIPTION OF SYMBOLS 10 Guide light, 11 Main body, 12 Main body cover, 13 Display part, 14 Light source part, 15 Spring, 16, 17 Heat sink, 18 Mounting hole, 19 Power supply insertion hole, 20 Rib, 21 Spring mounting part, 22 Convex part, 23 Power terminal block, 24 storage battery, 25 lighting unit, 26 inspection switch part, 27 LED, 28, 29 substrate, 30 lamp holder, 31 reinforcing bracket, 32 screw, 33 knob screw, 34, 35 light guide plate, 36, 37 display plate, 38 Display board case, 39 String attachment hole, 40, 41 connector, 42 Thermal conduction sheet, 43 Insulation plate, 44 Screw, 45 Opening, 46 Case attachment part, 47, 48 Elastic deformation part.

Claims (1)

A lighting unit to which a cable is connected is stored, and a main body having an opening on the lower surface;
A light source unit having a light source;
A display unit having an exit surface from which light emitted from the light source exits;
A connector provided in the light source unit, to which the cable is connected from a direction orthogonal to the emission surface of the display unit;
The display unit has an insertion port, and at least a part of the display unit is locked to the periphery of the insertion port to support the display unit, and is attached so as to cover the opening of the main body. A lighting device comprising a main body cover.

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