JP2012066727A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which hardly affects lighting of a light source, even in a room condition in which dew condensation is produced.SOLUTION: A light emitting diodes (LED) and a power supply circuit 20 of an LED lighting device 3 are arranged in an upper position of a lens 10 in an attached state to a vehicle ceiling. Thereby, even when dew condensation comes inside from a gap between a lens unit 6 and a housing 5, dew condensation hardly reaches the power supply circuit 20, and the LED and the power supply circuit 20 are protected from failure caused by dew condensation. Moreover, a first water proof wall 42 is formed over a circumference of the lens 10 in the housing 5. Thereby, since dew condensation which comes inside the LED lighting device 3 is blocked by the first water proof wall 42, and which does not flow out to the side of the lens 10, dew condensation hardly flows down from the gap around the lens 10.

Description

  The present invention relates to an illumination device that illuminates the surroundings with light from a directional light source.

  In recent years, lighting devices using LEDs as light sources, so-called LED lamps, are widely used. Since LEDs have the advantage of being small and have a long life, LED lamps are expected to become more widespread and have recently been used as vehicle interior lights (see Patent Document 1). When the LED lamp is lit for a long time, the LED and the power supply circuit have heat, which may cause a failure. Therefore, various heat dissipation measures have been devised to release the heat of the LED and the power supply circuit to outside using, for example, the phenomenon of heat conduction or heat transfer (see Patent Documents 2 and 3, etc.).

JP 2010-137793 A JP 2010-102997 A JP 2010-098204 A

  Incidentally, recently developed vehicles have high airtightness inside and outside the vehicle, and have a very rapid cooling / heating function by an air conditioner mounted in the vehicle. Therefore, for example, in a cold region, it is considered that there is a possibility that moisture in the room air condenses (condensation) by rapid heating and adheres to the ceiling wall surface of the vehicle body and flows out. .

  Since the LED lamp for vehicles is attached to the ceiling or the like in the vehicle, there is a high possibility that the LED lamp is arranged at a position close to the temperature boundary between the outside air and the inside air. When the LED lamp is turned on, the above heat dissipation measures are taken. Therefore, if the room is in a state where rapid heating is performed, the temperature around the lamp will have a larger temperature difference than the outside air. There is a concern that it is likely to occur and the problem of condensation is increased. If condensation occurs on the ceiling or the like of the vehicle body, there is a concern of entering the lamp through a bracket or the like for attaching the lamp. As a matter of course, this may adversely affect the power supply circuit, the light emitter, etc., and cause lighting failure or failure.

  Therefore, the inventors have been able to easily carry out the assembly work and maintenance work on the vehicle as usual with respect to this kind of LED lamp, and what should be done to wipe out the above-mentioned heat dissipation measures and concerns about condensation, As a result of various studies on the structure of the lamp, the present invention has been completed.

  The objective of this invention is providing the illuminating device which can make it difficult to influence the lighting of a light source, even under the indoor condition where condensation forms.

  In order to solve the above problems, in the present invention, a housing provided with a power supply circuit electrically connected to turn on a light source in an opening portion opened on the light illumination side, and a light source irradiated from the light source. And a lens unit that closes the opening of the housing from the opening side, and dew condensation occurring outside the device case is caused by the housing, the lens unit, Alternatively, a gist is provided with a dew condensation protection mechanism that ensures that the lighting of the light source moves normally even if it flows into the apparatus case from the gap between these members.

  According to this configuration, even if dew condensation flows into the device case of the lighting device, the dew condensation protection mechanism prevents the dew condensation from entering further into the device case. For this reason, since it becomes difficult for condensation to reach the electronic component of the lighting device, it is possible to make it difficult to cause a failure of the electronic component. Further, since it is difficult for the condensation to reach the lens, it is possible to prevent the condensation from flowing down from the gap around the lens.

  In the present invention, the dew condensation inflow protection mechanism is configured such that the power supply circuit or the light source is attached to a lighting device rather than a dew inflow port communicating the gap between the housing and the lens unit and the inside of the device case. It is summarized that the structure is disposed above.

  According to this configuration, even if dew enters the apparatus case through the gap between the housing and the lens unit, dew does not easily reach the power supply circuit or the light source. Therefore, it becomes possible to prevent the failure of the power supply circuit and the light source due to the adhesion of condensation.

  The gist of the present invention is that the dew condensation protection mechanism is a wall portion that is provided in the lens unit and blocks the middle of the dew that flows into the device case so as not to reach the lens.

  According to this configuration, even when condensation enters the apparatus case, the condensation is blocked by the wall portion formed in front of the lens, so that condensation does not easily reach the lens side. Therefore, it is possible to make it difficult for condensation to flow out from the inside of the apparatus case through the gap around the lens.

  In the present invention, the hook portion formed in the upper part of the wiring through hole for wiring drawing formed in the housing and the wiring drawn out from the wiring through hole are locked to the housing in a state of being inclined downward. The gist is that a dew condensation inflow suppressing mechanism having a wiring stopper is provided.

  According to this configuration, even if condensation has fallen into the wiring through hole from above, the condensation is blocked by the flange, so that it is difficult for the condensation to enter the device case from the wiring through hole. It becomes. In addition, since the tip of the wiring drawn out from the wiring through hole is locked to the wiring stopper at the lower position, the wiring can have an appropriate gradient. For this reason, since the dew condensation adhering to the wiring flows down along the wiring, it is possible to make it difficult for the dew condensation to enter the wiring through hole.

  In the present invention, the power supply circuit is arranged in an overlapping direction with respect to the lens, and heat generated from the power supply circuit is transmitted from a metal member attached to the power supply circuit through an air layer that touches the metal member. The gist is that a heat dissipation mechanism for escaping from the circuit is provided.

  According to this configuration, even if the power supply circuit has heat, since the heat is radiated from the power supply circuit by the heat dissipation mechanism, the temperature of the power supply circuit does not increase excessively. Therefore, it is possible to make it difficult to cause a failure due to a temperature rise in the power supply circuit. Moreover, if the power supply circuit does not easily have heat, a temperature difference is less likely to occur in the air around the lighting device. Therefore, this is a deterrent to the occurrence of condensation, which is very effective for the condensation problem.

  In the present invention, the locking claw formed on the housing is locked to the locked portion of the attachment destination, and a portion of the housing opposite to the locking claw is fixed to the attachment destination by the fastening portion. The gist is that an attachment mechanism is provided.

  According to this configuration, the lighting device is attached to the attachment destination by locking the locking claw to the locked portion of the attachment destination and stopping the opposite side portion by the fastening portion. Therefore, since it is not necessary to use a fastening part in all the places of attachment, it becomes possible to suppress the number of fastening parts required for attachment of an illuminating device small. Moreover, if the number of fastening portions is reduced, the assembly work can be simplified.

The gist of the present invention is that a partition portion is formed in the device case to divide an electronic component storage area and an attachment space for the fastening portion.
According to this configuration, even if condensation enters the device case from the insertion hole of the fastening portion, the condensation is blocked by the partition portion and does not flow into the electronic component side. Therefore, it is difficult for condensation to adhere to the electronic component, which is highly effective in preventing failure of the electronic component.

  The gist of the present invention is that the attachment mechanism includes a support portion capable of attaching a finger when performing attachment work to the attachment destination in the attachment space of the fastening portion.

  According to this configuration, when attaching the lighting device, by attaching a finger to the support portion of the housing, the fastening portion can be attached while firmly fixing the housing. Therefore, it becomes possible to improve workability | operativity when attaching an illuminating device to an attachment destination.

  In the present invention, the lens is provided as a light outlet on the surface of the device case, and a directional light source as the light source having irradiation light directivity is disposed at least at one end of the lens inside the device case. An illumination device for deriving the irradiation light emitted from the directional light source toward the other end of the lens from the lens, and transmitting light to either the front surface or the back surface of the lens And a reflective member is disposed on the inner surface side of the bottom surface of the apparatus case with a space from the light adjustment member, and the light adjustment member is disposed from the directional light source to the light adjustment member. A reflection effect that the reflection member has, a diffusion effect that diffuses the irradiation light incident on the directional light source in a direction orthogonal to the irradiation axis of the directional light source, and a reflection effect that is folded back to the incident side; The entire surface of the lens is obtained by a combined effect of a light guide effect that guides the irradiation light to the other end of the lens and a diffusion effect of the light adjusting member. The gist is to perform the illumination by making it shine.

  Here, the “irradiation axis of the light source” refers to the central axis of the light distribution (light flux) distribution from the light source. On this irradiation axis, the amount of light flux per unit area is approximately the maximum at a position equidistant from the light source. It has the property which becomes. The central axis does not necessarily mean a structural (geometric) symmetry axis in, for example, a light bulb or a bullet-type LED.

  According to this configuration, the illumination light source is arranged at the end of the lens so that the directional light source is reflected on the lens (light emitting surface) and the appearance does not deteriorate. When the directional light source emits light, a part of the irradiation light is diffused in the orthogonal direction perpendicular to the irradiation axis of the directional light source by the diffusion effect of the light adjusting member, and is emitted from the lens to the outside. The Further, the light that has passed between the two members is guided in the irradiation direction (irradiation axis direction) by the light guide effect generated by arranging the light adjusting member having a reflection effect and the reflection member to face each other. Therefore, most of the reflected light of the directional light source reaches the end on the opposite side of the case. For this reason, since the light of the directional light source spreads widely to the lens, for example, it is possible to cause the lens to uniformly emit light without using a light guide plate that is an expensive component.

  According to the present invention, it is possible to make it difficult to affect the lighting of the light source even under indoor conditions where dew is generated.

The external view of the LED lamp of one Embodiment. The perspective view which looked at the LED lamp from the housing side. The exploded perspective view of an LED lamp when it sees from the housing side. The exploded perspective view of an LED lamp when it sees from the lens side. Sectional drawing of the lamp width direction of an LED lamp. Sectional drawing of the lamp length direction of a LED lamp. The plane sectional view of a LED lamp. The top view of the lens and lid part seen from the inside. The top view which shows the external appearance of a diffusion film, and its partial enlarged view. The connector attachment part and the expansion perspective view of the circumference | surroundings. The electric block diagram of a LED lamp. The expansion perspective view which shows the surface shape of a light-diffusion film. It is explanatory drawing which shows the state which light diffuses and refracts in a light-diffusion film, (a) when an incident angle is smaller than a critical angle, (b) when an incident angle is larger than a critical angle, (c) is Explanatory drawing in case incidence takes the substantially same value as a critical angle. The state figure when condensation adheres to the LED lamp. (A)-(d) is explanatory drawing which shows the work process when attaching an LED lamp to the ceiling in a vehicle. The partial expanded sectional view of the LED lamp in another example.

Hereinafter, an embodiment of a lighting device embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, an LED lamp 3 that illuminates a vehicle interior (illumination place) using an LED 2 (see FIG. 4 or the like) as a light source is attached to the vehicle interior ceiling 1. The LED lamp 3 extracts the light from the LED 2 placed at the end in the lamp width direction (Y-axis direction in FIG. 4) in the lamp thickness direction (Z-axis direction in FIG. 3). In addition, the vehicle interior ceiling 1 corresponds to an attachment destination, the LED 2 constitutes a light source (directional light source) and an electronic component, and the LED lamp 3 corresponds to an illumination device.

  As shown in FIGS. 1 to 4, the LED lamp 3 is provided with a long and thin box-shaped main body case 4 as an outer frame part. As shown in FIGS. 2 to 4, the main body case 4 is provided with a resin housing 5 as a storage location for the electronic components of the LED lamp 3. The housing 5 is covered with two parts, a lens unit 6 and a lid portion 7. The lens unit 6 includes a resin frame portion 8, and a lens 10 is attached to the opening hole 9 of the frame portion 8. The LED lamp 3 illuminates the room with the surface of the lens 10 as a light irradiation surface. The main body case 4 corresponds to a device case.

  As shown in FIGS. 3 and 4, a locking frame 11 for locking the housing 5 on the inner side is provided upright around the lens 10 on the inner surface of the frame portion 8. A plurality of attachment pieces 12 having a snap-fit structure are formed at predetermined positions of the locking frame 11 with a predetermined interval. The lens unit 6 is assembled to the housing 5 by engaging the mounting pieces 12 with the protrusions 13 formed on the outer surface of the side wall 5 a of the housing 5.

  A pair of projecting pieces 14, 14 projecting in the planar direction of the lid portion 7 are projected from the edge portion of the lid portion 7. In addition, a pair of claw portions 15 and 15 projecting upward are provided on the inner surface of the lid portion 7. The lid portion 7 has a pair of locking portions 17, 17 formed on the edge of the housing 5 while inserting the protruding pieces 14, 14 into a pair of groove portions 16, 16 (see FIG. 3) at the end of the frame portion 8. The claw portions 15 and 15 are locked to the housing 5 and the lens unit 6.

  As shown in FIGS. 4 to 6, a first component storage chamber 18 that stores the electronic components of the LED lamp 3 is recessed in the housing 5. In the center of the first component storage chamber 18, a second component storage chamber 19 having a deeper recess is provided. The first component storage chamber 18 corresponds to a storage region for electronic components. The component storage chambers 18 and 19 constitute an opening.

  A power supply circuit 20 for the LED lamp 3 is stored in the second component storage chamber 19. The power supply circuit 20 includes a power supply board 21 and an element group 22 (both see FIG. 3) mounted on the power supply board 21. On the back surface of the power supply substrate 21, a metal heat radiating plate 23 that releases heat generated in the power supply circuit 20 from the power supply circuit 20 is attached by, for example, tape. The heat radiating plate 23 has a thin plate shape and is formed in substantially the same area as the power supply substrate 21. The power supply circuit 20 constitutes an electronic component, and the heat sink 23 corresponds to a metal member.

  As shown in FIGS. 4 and 6, a locking groove 25 that can lock the power supply unit 24 in which the power supply circuit 20 and the heat radiating plate 23 are integrated is formed in the side wall of the second component storage chamber 19. Yes. Therefore, the power supply unit 24 is assembled to the housing 5 by fixing the opposite side with the screw 26 while fixing the end in the lamp length direction (X-axis direction in FIG. 3) to the locking groove 25. .

  As shown in FIGS. 4, 5, and 7, in the first component storage chamber 18 of the housing 5, a pair of light source units 27, 27 face each other at both ends in the lamp width direction (Y-axis direction in FIG. 7). Is assembled. The light source units 27, 27 include a plurality of LEDs 2, 2... Arranged at equal intervals in the lamp length direction, and an elongated plate-like LED substrate 28 on which the LEDs 2, 2. The LED substrate 28 is connected to the power supply substrate 21 via the wiring 29. On the back surface of the LED board 28, a heat radiating plate 30 for releasing the heat generated in the LED board 28 from the LED board 28 is attached, for example, with a tape or the like. The heat radiating plate 30 has a thin plate shape and is formed in substantially the same area as the LED substrate 28.

  As shown in FIGS. 4 to 7, a plurality of locking walls 31 for mounting the light source unit 27 are arranged in parallel in the housing 5 at a position adjacent to the side wall 5 a. The light source unit 27 is assembled to the housing 5 by being inserted vertically between the side wall 5 a and the locking wall 31.

  As shown in FIG. 7, the LED 2 irradiates light in a direction parallel to the light emitting surface of the lens 10 (hereinafter referred to as a light emitting direction Kc). That is, the irradiation axis of the LED 2 is in a positional relationship parallel to the light emitting surface of the lens 10. The light emission direction Kc includes taking the irradiation axis of the LED 2 and also taking a direction perpendicular to the lamp length direction of the LED lamp 3. Further, the LEDs 2 located on one side in the lamp width direction and those located on the other side are alternately arranged in the lamp length direction (a direction orthogonal to the light emitting direction Kc).

  As shown in FIGS. 3 to 5, a sheet-like reflecting plate 32 having a light reflecting action on the surface is attached to a position below the heat radiating plate 23 of the power supply substrate 21. The reflecting plate 32 is disposed between the pair of light source units 27 and 27 at a predetermined interval from the lens 10 in the lamp thickness direction. The reflection plate 32 is for reflecting the irradiation light of the LED 2 toward the lens 10, and is formed of, for example, PET (Polyethylene terephthalate). The reflecting plate 32 is assembled to the housing 5 by engaging with a plurality of (four in this example) latching portions 33 formed on the inner surface of the housing 5. In addition, the reflecting plate 32 corresponds to a reflecting member.

  A transparent and sheet-like light diffusion film 34 that collects and irradiates input light is attached to the rear surface of the lens 10. The light diffusion film 34 is also called a prism sheet, for example, and is formed of a thin resin sheet (resin film). More specifically, the front side (lens 10 side) is formed of an acrylic resin, and the back side (reflector 32 side) has a two-layer structure composed of a polyester film layer. As shown in FIG. 5, a space region is formed between the reflector 32 and the light diffusion film 34 by being arranged at a predetermined interval, and this space region is a light passage region through which the irradiation light of the LED 2 passes. It has become. The light diffusion film 34 corresponds to a light adjusting member.

  As shown in FIGS. 3 and 8, an edge 35 having a predetermined thickness is formed in an annular shape so as to surround the lens 10 in the peripheral edge of the opening hole 9 inside the frame 8. The light diffusion film 34 is assembled to the frame portion 8 by inserting tongue pieces 37 corresponding to the light diffusion film 34 into a plurality of hooking holes 36 formed on the long side of the edge portion 35. The lens 10 is assembled to the lens 10 by locking its tongue piece 10a to the hooking hole 36 and the hooking hole 36a on the short side.

  As shown in FIG. 9, on the surface of the light diffusing film 34, narrow grooves 38, 38,... Extending in a single band in the film width direction are arranged at equal intervals in the film length direction. These grooves 38, 38... Are holes having a triangular cross-section that continuously decreases in width toward the back. The angle θ of the groove 38 is set to a value in the range of 60 to 120 degrees, for example. Between adjacent grooves 38, 38, a peak 39 having a triangular cross section is formed. As described above, the grooves 38 and the crests 39 are alternately arranged on the surface of the light diffusion film 34 in the film length direction. The light diffusion film 34 is disposed in a direction in which the groove direction Mc is parallel to the light emission direction Kc of the LED 2.

  By the way, since the LED lamp 3 is disposed in the vicinity of the boundary between the outside air and the inside air, that is, the ceiling 1 inside the vehicle, there is a possibility that condensation caused by a temperature difference between the inside and outside of the vehicle adheres to the LED lamp 3. Therefore, the LED lamp 3 of this example is provided with a dew condensation inflow protection mechanism 40 that suppresses the dew that has flowed into the LED lamp 3 from flowing further into the case.

  As shown in FIGS. 5 and 6, the dew that flows into the main body case 4 through the gap between the lens unit 6 and the housing 5 enters the inside of the main body case 4 (second component storage chamber 19). If it is set as the inlet 41, the dew condensation inflow protection mechanism 40 is provided with the structure which arrange | positions LED2 and the power supply circuit 20 above the dew condensation inlet 41. FIG. For this reason, even if condensation flows into the inside of the main body case 4 from the condensation inlet 41, it is difficult for the condensation to reach the LED 2 and the power supply circuit 20 existing above this position.

  As shown in FIGS. 3 and 8, a first waterproof wall 42 is provided in the frame 8 around the edge 35 so as to block the dew that flows in from the dew condensation inlet 41. For this reason, even if dew condensation flows into the main body case 4 from the gap of the dew condensation inlet 41, the dew condensation is blocked by the first waterproof wall 42, so that dew condensation occurs between the frame portion 8 and the lens 10 through the catch hole 36. It becomes difficult to reach the connection part. Therefore, it is difficult for condensation to flow out of the gap between the frame portion 8 and the lens 10. The first waterproof wall 42 constitutes a wall portion.

  As shown in FIGS. 3 and 8, in the vicinity of each hooking hole 36, a second waterproof wall 43 that dams condensation is erected. The second waterproof wall 43 dams up the condensation flowing in from the condensation inlet 41 in cooperation with the first waterproof wall 42 on the front side. The second waterproof wall 43 constitutes a wall portion.

  In addition, a partition wall 44 is also provided on the end of the frame portion 8 on the lid portion 7 side so that condensation can be blocked. The partition wall 44 is formed as a large wall between the pair of grooves 16 and 16. The partition wall 44 makes it difficult for the condensation that has entered from the lid 7 side to enter the lens 10 side (second component storage chamber 19) and also prevents light leakage of the LED 2. In addition, the partition wall 44 comprises a wall part and a partition part.

  As shown in FIGS. 2 and 3, a wiring through hole 46 for leading the wiring 45 of the power supply circuit 20 out of the main body case 4 is formed on the outer surface of the second component storage chamber 19 in the housing 5. On the upper part of the wiring through hole 46, a flange 47 that protrudes into the wiring through hole 46 is formed. The collar portion 47 has, for example, a semicircular shape when viewed from the side. Further, on the upper surface of the housing 5, there is provided a wiring stopper 48 capable of locking the wiring 45 drawn from the wiring through hole 46. The wiring stopper 48 locks the wiring 45 drawn from the wiring through hole 46 with a predetermined inclination. In addition to the wiring stopper 48, the wiring 45 is also locked to another adjacent wiring stopper 49. The flange 47 and the wiring stopper 48 constitute a dew condensation inflow suppressing mechanism.

  As shown in FIG. 10, a connector 50 is attached to the edge of the upper surface of the housing 5 as an electrical connection location of the LED lamp 3. The connector 50 is attached to a plate-like connector attaching portion 51 that protrudes from the housing 5. A pair of reinforcing ribs 52 (see FIG. 4) for reinforcing the connector mounting portion 51 are formed at the base of the connector mounting portion 51. A plurality of reinforcing portions 53 that reinforce the connector mounting portion 51 from within the housing 5 are formed inside the housing 5. On the rear surface of the front end of the connector mounting portion 51, there is a slope-shaped guide portion 55 that guides the insertion of the mounting claw 54 when the mounting claw 54 of the connector 50 is locked in the stop hole 51a (see FIG. 3). Is provided.

  By the way, since the conventional LED lamp was attached to the vehicle interior ceiling 1 only with the screw, there existed the present condition where the number of required screws increased. Therefore, the LED lamp 3 of the present example is provided with an attachment mechanism 56 that enables attachment to the vehicle interior ceiling 1 with the minimum necessary screws.

  In this case, as shown in FIGS. 2, 3, and 6, a locking claw 57 that can be hooked on the vehicle interior ceiling 1 protrudes at a position near the connector 50 on the upper surface of the housing 5. The locking claw 57 is integrally formed with the housing 5. In addition, the locking claw 57 has a shape in which the claw portion protrudes to the side, and the root is reinforced by a plurality of reinforcing ribs 58.

  In the housing 5, a portion opposite to the locking claw 57 is a mounting portion (screw mounting portion) 60 of the screw 59. Therefore, the LED lamp 3 is attached to the vehicle interior ceiling 1 by engaging the locking claw 57 with the roof lining 61 and fixing the opposite side to the vehicle interior ceiling 1 with the screw 59. The entire area of the screw attachment portion 60 is covered with the lid portion 7. The screw 59 corresponds to the fastening portion, and the roof lining 61 corresponds to the locked portion.

  In the housing 5, a support wall 63 is formed between the mounting space 62 of the screw 59 and the second component storage chamber 19 so that a finger can be attached when the LED lamp 3 is mounted on the vehicle interior ceiling 1. The support wall 63 has a height equivalent to that of the side wall 5 a of the housing 5, and defines each region of the second component storage chamber 19 and the screw attachment space 62. The screw mounting space 62 is formed by a region surrounded by the side wall 5 a of the housing 5 and the support wall 63. Moreover, the support wall 63 suppresses the dew intrusion into the second component storage chamber 19 and also suppresses the leakage of the irradiation light of the LED 2 to the side. The screw attachment space 62 corresponds to the attachment space for the fastening portion, and the support wall 63 constitutes a wall portion, a partition portion, and a support portion.

  As shown in FIG. 6, the LED lamp 3 of this example is provided with a heat dissipation function that dissipates heat generated in the electronic component by a heat transfer effect. In this case, an air layer 66 is formed between the heat dissipation plate 23 and the reflection plate 32 of the power supply circuit 20, and an air layer 67 is also formed between the reflection plate 32 and the light diffusion film 34. . These air layers 66 and 67 pass through a passage 68 formed by the partition wall 44 and the support wall 63, and communicate with the outside through a gap 69 between the lid 7 and the housing 5 and a gap in the screw hole 64. A thick part 64a is formed around the hole of the screw hole 64 in order to ensure hole strength. The air layers 66 and 67, the passage 68, the gap 69, the gap between the screw holes 64, and the like constitute a heat dissipation mechanism.

  Convection is generated in the air layers 66 and 67 when the screw holes 64 and the gaps 69 are electrically connected to the outside. For this reason, the heat generated by the LED 2 and the power supply circuit 20 is dissipated by the flow of air (the flow of the thick arrows in FIG. 6) that flows out from the screw holes 64 and the gaps 69 through the passage 68.

  As shown in FIGS. 4 and 10, a pair of guide portions 70 that guide insertion of the pair of claw portions 15, 15 of the lid portion 7 are positioned at the front side of the locking portions 17, 17 at the edge of the housing 5. 70 is provided. The guide parts 70 are slopes that become ascending slopes toward the back. Therefore, when the lid portion 7 is assembled to the housing 5, the guide portions 70 and 70 guide the insertion of the claw portions 15 and 15, and the claw portions 15 and 15 smoothly enter the locking portions 17 and 17.

  As shown in FIG. 3 and FIG. 8, waterproof protrusions 71 that suppress the intrusion of condensation on the electronic component side are provided at two locations (double structure) on the inner surface of the lid portion 7. The waterproof protrusion 71 makes it difficult for the condensation to reach the LED 2 and the power supply circuit 20 even if condensation enters from the screw hole 64. The pair of waterproof protrusions 71 are arranged so as to be arranged between the protrusions 14 and 14 and the claw portions 15 and 15.

  As shown in FIG. 11, the power supply circuit 20 is connected with a power switch 72 that is operated when the power of the LED lamp 3 is turned on or off, and a light quantity volume 73 that is operated when the light quantity of the LED lamp 3 is adjusted. Has been. The power switch 72 and the light volume 73 are installed around the driver's seat, for example. The power supply circuit 20 controls the operation state of the LED lamp 3, the illumination light quantity, and the like based on operation signals from the power switch 72 and the light quantity volume 73.

Next, the illumination principle of the LED lamp 3 of this example is demonstrated according to FIG.12 and FIG.13.
In the light diffusion film 34, incident light (light from the LED 2) entering from its back surface (lower surface 34a: see FIG. 12) depends on the incident angle at that time, and the boundary surface of the light diffusion film 34 (the boundary surface 75 in FIG. 13). The light diffusion component (refracted light) and the reflection component (reflected light) are changed.

  Here, when light enters from a medium with a large refractive index into a medium with a small refractive index, the incident light does not pass through the boundary surface and is totally reflected is called total reflection. The incident angle (the angle formed with respect to the perpendicular to the boundary surface). ) Is greater than a certain angle, total reflection occurs. This angle is known as the critical angle θx. When light travels from the light diffusion film 34 to the outer surface (in the air) side, it corresponds to the case where light enters from a medium having a high refractive index (light diffusion film 34) to a small medium (air). May happen.

  Here, as shown in FIG. 13A, the incident light incident on the boundary surface 75 has an angle of incidence with respect to the perpendicular line La of the boundary surface 75. At this time, when the incident angle α is smaller than the critical angle θx (θx> α), a part of this is refracted from the boundary surface of the groove 38 and exits with an angle of refraction angle α1 on the upper side (light diffusion effect). In addition, a part of the incident light is reflected on the boundary surface 75 at the same incident angle α, and this reflected light is reflected on the opposite boundary surface 76 that is the irradiation destination.

  As shown in FIG. 13B, when the incident light with respect to the boundary surface 75 has an incident angle β (θx <β) larger than the critical angle θx, all of the incident light is reflected by the boundary surface 75 of the groove 38. The reflected light is irradiated to the opposite boundary surface 76 that is the irradiation destination. Then, if this reflected light reaches the boundary surface 76 at an incident angle β1 smaller than the critical angle θx, for example, this reflected light is partially refracted from the boundary surface 76 of the groove 38, and the refraction angle β2 is on the upper side. And part of the reflected light is further reflected on the boundary surface 76 at the same β1 angle and reflected toward the inside of the light diffusion film 34 (light reflection effect).

  Therefore, part of the incident light incident from the back surface 34a of the light diffusion film 34 is in the film length direction on the front side of the light diffusion film 34 due to the light that escapes from the surface of the light diffusion film 34 due to the diffusion effect of this light. It seems to spread. For this reason, in this example, as shown in FIG. 9, when the light diffusion film 34 is attached to the frame portion 8, the light emitting direction Kc of the LED 2 and the groove direction Mc of the light diffusion film 34 are made parallel to each other. Is irradiated as two illumination lights (see FIG. 12) by the light diffusion film 34. Thereby, on the surface side of the light diffusion film 34, the number of light visible to human eyes increases, and the light emitting surface of the lens 10 can be spread in the longitudinal direction (X-axis direction in FIG. 3). .

  On the other hand, as shown in FIG. 13C, when the incident light with respect to the boundary surface 75 has the same or slightly larger incident angle γ (θx ≦ γ <β) as the critical angle θx, the boundary surface 75 of the groove 38. In FIG. 2, the light is totally reflected at the same incident angle γ, and further totally reflected at the boundary surface 76, so that all components of incident light escape to the back side of the light diffusion film 34 (light reflection effect). Therefore, in the light diffusing film 34 of the present example, when the incident angle of light is slightly larger than the critical angle θx, there is no transmitted light and all the light is totally reflected. Therefore, the reflection efficiency is very high. I can say that.

Next, the operation and effect of the LED lamp 3 of this example will be described with reference to FIGS.
As shown in FIG. 14, when condensation is attached to the LED lamp 3, the LED 2 and the power supply circuit 20 are positioned above the condensation inlet 41 even if this condensation enters the main body case 4 from the condensation inlet 41. Therefore, dew condensation hardly adheres to the LED 2 and the power supply circuit 20. Therefore, it is difficult for the LED 2 and the power supply circuit 20 to be broken due to condensation adhesion. Condensation is blocked by the first waterproof wall 42, the second waterproof wall 43, and the partition wall 44. Therefore, since it is difficult for condensation to reach the lens 10 side, it is also possible to prevent condensation from flowing through the gap of the lens 10.

  Here, for example, when dust or the like is accumulated in the gaps of the lenses and the dew that has entered the case does not fall down and accumulates in the case, there is a concern that the water level of the dew condensation becomes higher. However, in the case of this example, as shown in the circle of FIG. 14, the lowest frame portion 11a of the locking frame 11 is lower than the power supply circuit 20 and the LED 2 (the light source unit 27 and the frame portion). 11a), the accumulated condensation is discharged out of the case. Therefore, it is possible to suppress the condensation from adhering to the LED 2 and the power supply circuit 20.

  When the LED lamp 3 is attached to the vehicle interior ceiling 1, as shown in FIG. 15A, the LED lamp 3 without the lid portion 7 is prepared, and the connector 50 is first connected to the vehicle body side connector 74. Then, as shown in FIG. 15B, the locking claw 57 is locked to the edge of the roof lining 61 of the vehicle body, and as shown in FIG. The main body case 4 is fixed to the vehicle interior ceiling 1 with screws 59. And finally, as shown in FIG.15 (d), the cover part 7 is attached to the screw attachment part 60. FIG. When the LED lamp 3 is assembled to the ceiling 1 in the vehicle, the periphery of the lens 10 and the lid portion 7 overlaps with the opening edge of the head lining 77 from above, so that the edge of the head lining 77 is not exposed to the outside.

  Therefore, since the latching structure which hooks the edge part of the LED lamp 3 to the vehicle interior ceiling 1 with the latching claw 57 is taken, the number of necessary screws can be reduced. Further, since the support wall 63 is provided, it is possible to attach a finger when attaching. For this reason, screwing workability is also improved. In addition, the compartment wall 44 and the support wall 63 form a room for storing electronic components and a room for attaching the screw 59 as separate rooms. Accordingly, when the screw 59 is screwed to the attachment destination with a screwdriver or the like, the screwdriver 59 can be safely attached because the driver does not contact (interfere) with the LED unit or the like.

  Further, the heat generated in the electronic component is released to the outside of the main body case 4 by the heat dissipation function (see FIG. 5). For this reason, since it becomes possible to suppress the temperature rise of an electronic component (LED2 and the power supply circuit 20), it becomes possible to prevent component deterioration by overheating and to extend the lifetime as an apparatus.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) Since various condensation inflow protection mechanisms 40 are provided in the LED lamp 3, it becomes difficult for condensation to enter the inside of the LED lamp 3, and even if condensation enters, it is difficult for this to flow out downstream of the lamp. Therefore, it is possible to make it difficult to cause a component failure due to the adhesion of condensation, and it is also possible to make it difficult for condensation to flow downward from the gap around the lens 10.

  (2) Since the LED 2 and the power supply circuit 20 are arranged above the dew condensation inlet 41, even if dew condensation enters the lamp from the dew condensation inlet 41, the dew condensation is difficult to adhere to the LED 2 and the power supply circuit 20. Therefore, it is possible to make it difficult to cause a failure of the power supply circuit 20 caused by condensation.

  (3) Since the first waterproof wall 42 and the second waterproof wall 43 are provided around the lens 10 in the housing 5, even if condensation enters from the condensation inlet 41, the first waterproof wall 42 and the second waterproof wall are provided. At 43, condensation is blocked. Therefore, since it is difficult for condensation to reach the lens 10 side, it is possible to prevent the condensation from flowing down from the periphery of the lens 10.

  (4) Since the flange 47 is provided on the upper part of the wiring through hole 46 of the housing 5, it is possible to make it difficult for condensation to enter the housing 5 from the wiring through hole 46. Therefore, it is possible to more effectively prevent a failure of the electronic component due to the adhesion of condensation. In addition, a wiring stopper 48 is provided at a position lower than the wiring through hole 46, and the wiring 45 drawn out from the wiring through hole 46 is locked to the wiring stopper 48, whereby the wiring 45 is inclined (gradient). I gave it. Therefore, even if dew condensation adheres to the wiring 45, the dew condensation flows down through the wiring 45, making it difficult for the dew condensation to enter the wiring through hole 46. For this reason, it is possible to more effectively prevent condensation from entering the housing 5.

  (5) Since the housing 5 is made of resin, the component cost of the housing 5 can be kept low as compared with the case where it is made of metal, for example. By the way, in the case of a metal housing, for example, the driving heat of the power supply circuit 20 and the LED 2 can be released to the metal housing. However, if the resin housing 5 is used, this heat dissipation cannot be expected. However, in the case of this example, since the heat sink 23 is attached to the power supply circuit 20 and the heat sink 30 is attached to the LED 2, heat can be released by these heat sinks 23 and 30. In addition, since the air layer 66 is provided between the heat dissipation plate 23 and the reflecting plate 32 of the power circuit 20, and the heat of the power circuit 20 can be released to the outside by the convection effect of the air layer 66, the power circuit 20 It is also possible to dissipate heat to the outside of the main body case 4 more effectively.

  (6) When the housing 5 is made of resin (for example, polypropylene), since the resin has a property that the tape is difficult to stick, the power supply circuit 20 and the light source unit 27 cannot be directly attached to the housing 5 with the tape. Therefore, in the case of this example, a mechanism for locking the power supply circuit 20 to the latching portion 33 of the housing 5 and screwing is provided, so the power supply circuit 20 is attached to the housing 5 even if the housing 5 is made of resin. be able to. Further, since the locking wall 31 for sandwiching the light source unit 27 in the housing 5 is provided, the light source unit 27 can be attached to the housing 5 even if the housing 5 is made of resin.

  (7) Since the LED lamp 3 is attached to the vehicle interior ceiling 1 by the attachment mechanism 56 using the locking claw 57 and the screw 59, the LED lamp 3 can be attached to the vehicle interior ceiling 1 with a small number of screws. Further, if the number of screws required for attachment is small, the attachment work can be simplified accordingly.

  (8) Since the first component storage chamber 18 and the screw mounting space 62 are separated from each other by the partition wall 44 and the support wall 63, even if condensation enters the lamp from the screw hole 64, this condensation However, it is difficult to reach the first component storage chamber 18. Therefore, it is possible to make it difficult for electronic components to fail due to condensation adhesion.

  (9) Since the support wall 63 to which a finger can be attached when the LED lamp 3 is screwed to the vehicle interior ceiling 1 is provided between the screw mounting portion 60 and the first component storage chamber 18, the LED lamp 3 Can be attached to the ceiling 1 of the vehicle, the LED lamp 3 can be supported in a positioned state by attaching a finger to the support wall 63. Therefore, workability when attaching the LED lamp 3 to the vehicle interior ceiling 1 can be improved.

  (10) A light diffusion film 34 is attached to the back surface of the lens 10, and the light diffusion effect in the direction perpendicular to the groove 38 of the light diffusion film 34 and the light passing through the region between the light diffusion film 34 and the reflection plate 32. Due to the light guiding effect that reflects and guides them far away, the light of the LED 2 is spread in the plane direction of the lens 10 (X-axis direction and Y-axis direction). For this reason, since it becomes possible to spread the light of the LED 2 having directivity in a planar shape, the lens 10 can be surface-emitted using this light source.

(11) Since the partition wall 44 and the support wall 63 can suppress light leakage of the LED 2, a sufficient amount of illumination light for the LED lamp 3 can be ensured.
(12) Since the wiring stopper 49 is provided at a position near the tip of the housing 5, the wiring 45 is positioned at a distance from the locking claw 57. Therefore, when the locking claw 57 is locked to the edge of the vehicle interior ceiling 1, the wiring 45 does not mesh with the locking claw 57.

  (13) Since the lens 10 and the power supply circuit 20 are overlapped, the lens surface is not affected by the power supply circuit 20. Therefore, the entire surface of the main body case 4 can be used as the arrangement space for the lens 10, and the lens surface can be made as large as possible.

  (14) Since the base of the connector mounting portion 51 is reinforced by the reinforcing rib 52 or the reinforcing portion 53, the connector mounting portion 51 can be made difficult to be deformed or damaged from the base. Moreover, since the guide part 55 for attaching the connector 50 to the tip of the connector attaching part 51 is provided, the connector 50 can be attached to the connector attaching part 51 smoothly.

(15) Since the guide portion 70 for guiding the attachment of the lid portion 7 is provided on the peripheral edge of the housing 5, the lid portion 7 can be smoothly attached to the housing 5.
(16) Since the double wall of the partition wall 44 and the support wall 63 prevents dew condensation from entering, even if dew condensation enters the case from the screw hole 64, it is more effective that the dew condensation reaches the electronic component side. Can be prevented.

  (17) Since the reinforcing thick portion 64 a is formed around the screw hole 64, the screw hole 64 can be made difficult to break when the screw 59 is screwed into the screw hole 64. In addition, since no washer is required, the number of parts can be reduced.

Note that the embodiment is not limited to the configuration described so far, and may be modified as follows.
-The light source unit 27 (LED2) is not limited to being attached to the housing 5 side. For example, as shown in FIG. 16, the light source unit 27 (LED 2) may be provided in the lens unit 6. In this case, since the height of the locking frame 11 of the lens unit 6 can be taken, it is possible to make it difficult for condensation to enter the case. Further, as shown by a broken line in the figure, a through hole 91 may be provided in the side wall 5 a of the housing 5, and condensation that has entered from the gap may be discharged to the outside from the through hole 91. At this time, the through hole 91 may be formed in a slope shape so that the outer side of the case is lowered. If it carries out like this, dew condensation can be made hard to penetrate | invade and the dew condensation which entered into the crevice can be discharged actively outside.

  The dew condensation protection mechanism 40 is not limited to the one described in the embodiment, and suppresses dew intrusion into the main body case 4 or dew intrusion into the main body case 4 reaches the electronic component or the lens 10. Any structure and shape may be adopted as long as they are difficult to make.

The housing 5 is not limited to resin but may be made of metal, for example.
-The LED lamp 3 is good also as a structure without the cover part 7. As shown in FIG.
The shape and height of the first waterproof wall 42, the second waterproof wall 43, and the partition wall 44 can be variously changed as long as the intruded dew can be blocked.

A heat dissipation effect may be promoted by forming air holes in the frame portion 8 of the lens unit 6 to create an air flow in the main body case 4.
The arrangement position and the number of the locking claws 57 can be changed as appropriate. Further, the number of screws 59 is not limited to one and may be plural.

-A part of heat sink 23,30 may be exposed outside the housing 5, and the heat dissipation effect may be improved.
The heat dissipation mechanism is not limited to being configured by the gaps between the air layers 66 and 67, the passage 68, and the screw hole 64, and the structure is not particularly limited as long as heat can be released.

-A fastening part is not limited to a screw, For example, you may use other components, such as a pin.
-A division part may consist only of the division wall 44 of the frame part 8, for example.
-An electronic component is not limited to LED2 or the power supply circuit 20, You may employ | adopt another component.

The switch of the LED lamp 3 is not limited to the power switch 72 and the light amount volume 73, but may be a switch for switching the color of illumination or a switch for setting a timer, for example.
-The metal member for heat dissipation is not limited to a plate-shaped thing, For example, you may employ | adopt a rod-shaped member.

  -The condensation inflow suppressing mechanism is not limited to the one composed of the flange portion 47 and the wiring stopper 48, and any structure can be used as long as it prevents condensation inflow into the main body case 4. May be.

  -When the light-diffusion film 34 which consists of a sheet material is used as a light adjustment member, this is not necessarily limited to a prism sheet, For example, you may employ | adopt a light-diffusion sheet and a condensing sheet. The light adjusting member is not necessarily limited to this type of resin sheet material, and for example, a resin plate or glass may be used.

The light adjusting member is not necessarily limited to one having a plurality of regularly arranged grooves 38 on the surface, and the shape and material are not particularly limited as long as the light adjusting member has a light diffusing function and a reflecting function.
-The light-diffusion film 34 is not limited to what has the double structure which a front side is an acrylic resin, and a back side consists of a polyester film layer, and may consist of a material of one layer. Moreover, when taking a double structure, these materials are not limited to an acryl and a polyester film, You may use materials other than these.

The member disposed above the condensation inlet 41 may be either the LED 2 or the power supply circuit 20.
-The LED lamp 3 does not necessarily have one illumination functional unit, and a plurality of illumination functional units may be provided.

The LED 2 is not limited to being disposed on both sides of the main body case 4 in the width direction, and may be disposed on only one side.
The LEDs 2 are not limited to being alternately arranged on the left and right in the width direction of the main body case 4, and may be arranged in the same position.

The directional light source is not necessarily limited to the one having a plurality of LEDs 2 and may be composed of a single LED 2 when high luminance can be obtained with one.
The directional light source is not necessarily limited to the plurality of LEDs 2 arranged, and any type of light source may be used as long as the light emitted from the light source has directivity. For example, one LED may be used, or the line type light source may be an aperture type cold cathode tube.

The lens 10 is not necessarily limited to one having a flat surface, but may have a curved surface shape with a slightly rounded surface.
-A reflection member is not necessarily limited to the plate-shaped reflection board 32, The shape will not be specifically limited if it can reflect light. Further, the material of the reflecting member is not limited to resin, and any material may be adopted as long as it has a light reflecting action.

Needless to say, the LED lamp 3 is not necessarily used as a vehicle interior lamp but can be applied to various lamps.
Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.

  (A) A housing provided with a power supply circuit electrically connected to turn on the light source is provided in an opening portion opened on the light illumination side, and a lens that transmits the light emitted from the light source to the outside. In addition, in the lighting device including the lens unit that closes the opening of the housing from the opening side, the locking claw formed on the resin-made housing is locked to the locked portion of the attachment destination. In the housing, an attachment mechanism is provided for fixing a portion opposite to the locking claw to the attachment destination by a fastening portion.

  By the way, when attaching an illuminating device to an attachment destination only by a fastening part, since several fastening parts are required, parts cost starts. Moreover, since the fastening operation | work of a fastening part is needed in several places, attachment work is also troublesome. However, according to this configuration, the number of fastening portions necessary for mounting the lighting device can be reduced, which contributes to component cost reduction and simplification of mounting work.

  (B) a housing having a power supply circuit electrically connected to turn on the light source, and a lens that transmits the light emitted from the light source to the outside in the opening portion opened on the light illumination side; And a lens unit that closes the opening of the housing from the opening side, and can be attached to an attachment destination using a fastening portion. In the device case, an electronic component storage area and the fastening portion A partition portion for partitioning the mounting space is formed.

  By the way, in the structure where the lighting device is fixed by the fastening portion, an insertion hole (for example, screw hole) of the fastening portion is formed in the housing, and dew condensation can enter the device case from this insertion hole. I can't deny it. Therefore, in this configuration, the storage area for the electronic component and the attachment space for the fastening portion are partitioned by the partition portion, so that the dew that has entered from the insertion hole is unlikely to reach the electronic component. Therefore, it becomes possible to make it difficult to cause a failure of the electronic component due to the adhesion of condensation.

  (C) A housing having a power supply circuit electrically connected to turn on the light source and a lens that transmits the light emitted from the light source to the outside are provided in the opening portion opened on the light illumination side. In addition, in a lighting device including a lens unit that closes the opening of the housing from the opening side, it is possible to attach a finger when performing attachment work to the attachment destination in the attachment space of the fastening part A support part is provided. According to this configuration, when attaching the lighting device to the attachment destination, it becomes possible to attach the finger to the support portion and firmly fix the lighting device, so that it is possible to improve the workability of mounting the lighting device. Become.

  (2) A housing provided with a power supply circuit electrically connected to turn on the light source, and a lens that transmits the light emitted from the light source to the outside are provided in the opening portion opened on the light illumination side. In addition, in a lighting device including a lens unit that closes the opening of the housing from the opening side, a heat dissipation mechanism that can radiate heat generated in the light source or heat generated in the power supply circuit to the outside is provided. .

  By the way, when the housing is made of resin, for example, there is no place for heat release from the directional light source or the power supply circuit. However, in this configuration, heat can be released to the outside by the heat dissipation mechanism. There is no problem as a product.

  (E) In any one of claims 5 to 9 and the technical idea (2), the heat dissipation mechanism is a metal body attached to an electronic component (light source or power supply circuit). According to this configuration, heat generated in the electronic component can be radiated to the outside with a simple structure in which the metal body is attached to the electronic component.

  (F) In any one of claims 5 to 9 and the technical idea (2), the heat dissipation mechanism releases heat to the outside by convection of an air layer in contact with the metal body. According to this configuration, the heat generated in the electronic component can be effectively released by the metal body and air convection, so that the temperature rise of the electronic component can be more effectively suppressed.

  (G) In any one of claims 1 to 9 and the technical ideas (a) to (f), at least a member including the resin-made housing, a power supply circuit that supplies power to the light source, or the directional light source. And a locking mechanism that locks the housing. According to this configuration, if the housing is made of resin (for example, polypropylene), it is difficult to attach the component to the housing with tape or the like (or easily peel off). However, in this configuration, a locking mechanism for attaching the component is provided. The power supply circuit can be attached to the housing without any problem.

  (H) In any one of claims 1 to 9 and the technical ideas (a) to (g), light leakage prevention for preventing light leakage so that light from the light source does not leak from a location outside the lens. Means provided. According to this configuration, since the amount of light passing through the lens is secured, it is possible to secure the brightness of the illumination.

  (I) In any one of claims 6 to 9 and the technical ideas (A) and (E) to (H), a reinforcing rib that makes the locking claw difficult to break is formed on the locking claw. ing. According to this configuration, the strength of the locking claw can be secured by the reinforcing rib.

  (Nu) Claims 6 to 9 and any one of the technical ideas (A) and (E) to (L), a lid portion for concealing the fastening portion is attached to the opposite side portion. According to this configuration, since the fastening portion is not exposed to the outside, it is possible to ensure the appearance.

  (L) Claim 8 or 9, wherein in any one of the technical ideas (c) and (e) to (n), the support portion serves as a waterproof wall that prevents the condensation from reaching the lens side. Also serves. According to this configuration, it is possible to further reduce the failure of the electronic component due to condensation.

  (V) Claim 8 or 9, wherein in any one of the technical ideas (C) and (E) to (L), the support portion also serves as a wall for preventing light leakage of the directional light source. Yes. According to this configuration, since the amount of light passing through the lens is ensured, it is possible to ensure illumination brightness.

  DESCRIPTION OF SYMBOLS 1 ... Car interior ceiling as attachment destination, 2 ... LED which comprises a light source (directional light source) and an electronic component, 3 ... LED lamp as an illuminating device, 4 ... Main body case as an apparatus case, 5 ... Housing, 6 ... Lens Unit 10, lens 18, first component storage chamber constituting electronic component storage area and opening 19, second component storage chamber forming opening 20, power circuit constituting electronic component 23, 23 A heat radiating plate as a metal member, 32... A reflecting plate as a reflecting member, 34... A light diffusion sheet as a light adjusting member, 40 .. dew condensation inflow protection mechanism, 41. 43, a second waterproof wall constituting the wall portion, 44, a partition wall constituting the wall portion and the partition portion, 45, a wiring, 46, a wiring through hole, 47, a collar portion constituting a dew condensation inflow suppressing mechanism, 48 ... dew condensation inflow suppression mechanism Wiring stoppers to be formed, 56... Mounting mechanism, 57 .. locking claw, 59... Screw as a fastening part, 61 .. roof lining as a locked part, 62. ... Walls, partition walls and support walls constituting the support part, 64 ... Screw holes constituting the heat radiation mechanism, 66, 67 ... Air layer constituting the heat radiation mechanism, 68 ... Passage constituting the heat radiation mechanism, 69 ... Heat radiation mechanism Constituting the gap.

Claims (9)

A housing having a power supply circuit electrically connected to turn on the light source in an opening opened on the light illumination side;
In a lighting device comprising a lens that transmits light emitted from the light source to the outside, and a lens unit that closes the opening of the housing from the opening side,
Even if dew condensation generated outside the device case flows into the device case from the housing, the lens unit, or a gap between these members, the lighting of the light source can be operated normally. An illumination device comprising a condensation inflow protection mechanism for securing. The dew condensation inflow protection mechanism is arranged above the dew inflow state where the power supply circuit or the light source communicates the gap between the housing and the lens unit and the inside of the device case in the mounting state of the lighting device. The lighting device according to claim 1, wherein the lighting device has a structure. The said dew condensation inflow protection mechanism is a wall part which is provided in the said lens unit, and is dammed on the way so that the dew condensation which flowed in in the said apparatus case may not reach to the said lens. The lighting device described. A hook portion formed in an upper portion of a wiring through hole for wiring drawing formed in the housing; and a wiring stopper for locking the wiring drawn out from the wiring through hole to the housing in a state of being inclined downward. The illuminating device according to any one of claims 1 to 3, further comprising a dew condensation inflow suppressing mechanism. Dissipating heat from the power supply circuit by disposing the power supply circuit in an overlapping direction with respect to the lens and releasing heat generated from the power supply circuit from the metal member attached to the power supply circuit through an air layer that touches the metal member. The illumination device according to claim 1, further comprising a mechanism. An attachment mechanism is provided that engages a latching claw formed on the housing with a latched portion of an attachment destination, and fixes a portion of the housing opposite to the latching claw to the attachment destination by a fastening portion. The lighting device according to any one of claims 1 to 5, wherein The lighting device according to claim 6, wherein a partition portion that divides an electronic component storage area and a mounting space for the fastening portion is formed in the device case. The lighting device according to claim 6, wherein the attachment mechanism includes a support portion capable of attaching a finger when performing an attachment operation to the attachment destination in an attachment space of the fastening portion. . The lens is provided as a light outlet on the surface of the device case, and a directional light source as the light source having directional light is disposed at at least one end of the lens inside the device case. An illuminating device for deriving from the lens the irradiation light irradiated from the sexual light source toward the other end of the lens,
A translucent light adjusting member is disposed on either the front surface or the back surface of the lens, and a reflecting member is disposed on the inner surface side of the bottom surface of the device case with a space from the light adjusting member.
The light adjusting member has a diffusion effect for diffusing irradiation light incident on the light adjusting member from the directional light source in a direction perpendicular to the irradiation axis of the directional light source, and a reflection effect for folding back to the incident side. And
A light guiding effect that guides the irradiation light to the other end of the lens by the light reflecting effect of the reflecting effect of the reflecting member and the reflecting effect of the light adjusting member;
The illumination device according to any one of claims 1 to 8, wherein illumination is performed by causing the lens to shine over the entire surface by a combined effect with the diffusion effect of the light adjusting member.

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