JP2008166145A - Vehicular lighting fixture, and light-emitting diode bulb - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a vehicular lighting fixture equipped with both a head lamp bulb and a light-emitting diode, or obtain a light-emitting diode bulb hardly affected by heat and superior in light diffusibilty. <P>SOLUTION: A light source 54 of the head lamp bulb 50 generates heat by light emission. Accordingly, a space part 19 surrounded by a reflecting face 12A of a reflector 12 and a lens 14 becomes to have a high temperature. As for the light-emitting diode bulb 400, a light-emitting part 412 of the tip part of a light guide part 410 is arranged and installed at the reflecting face 12A side of the reflector 12, that is the space part 19. However, the light-emitting diode 150 is arranged and installed at the rear face 12B side of the reflecting face 12A. In other words, the head lamp 10 has a constitution that the light-emitting diode 150 is not affected by the heat even if the space part 19 at which the light-emitting part 412 of the light-emitting diode bulb 400 is arranged and installed becomes to have the high temperature. In the light-emitting diode 150, malfunctions such as life reduction and wire disconnection due to effect of heat are prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicular lamp and a light emitting diode bulb.

  Instead of filament lamps such as incandescent bulbs, light-emitting diodes that are advantageous in that they are inexpensive, have a long life, and have a low probability of failure are being adopted for automobile lighting. (For example, see Patent Document 1, Patent Document 2, and Patent Document 3).

  However, light emitting diodes are vulnerable to “heat”, and their life is extremely reduced when they are affected by heat. Also, disconnection may occur due to heat. For this reason, it is currently used in places where it is unlikely to be affected by heat.

  As a vehicular lamp provided in an automobile, a clearance lamp integrated headlamp is known. The clearance lamp integrated headlamp has a configuration in which a head lamp bulb composed of a filament lamp or the like and a clearance lamp bulb are arranged in a lamp unit (see, for example, Patent Document 4).

  Since the filament lamp generates a large amount of heat, the clearance lamp bulb is affected by heat. Therefore, it has been difficult to employ a light-emitting diode that causes a defect (life reduction or disconnection) when affected by heat as a clearance valve. In order to remove the influence of heat, it is possible to attach heat dissipation countermeasure parts such as a heat sink, but there are problems of cost increase and mounting problems (significant design change is required compared to normal mass-produced products), etc. There are many problems to be solved.

Further, there is a demand for a light-emitting diode bulb that is not easily affected by heat and has excellent light diffusibility.
JP 2000-067610 A Japanese Patent Laying-Open No. 2005-067365 JP 2002-245812 A JP 2001-351413 A

  In view of the above problems, the present invention provides a vehicular lamp provided with both a headlamp bulb and a light emitting diode, or obtains a light emitting diode bulb that is not easily affected by heat and has excellent light diffusibility. Is the purpose.

  The vehicular lamp according to claim 1, a reflector having a reflecting surface that reflects light, a headlamp bulb having a light source section disposed on the reflecting surface side of the reflector, and a back surface of the reflecting surface of the reflector. A light emitting diode disposed on the side, light emitted from the light emitting diode is incident and guided, and the light guide penetrates through the reflector. And a light emitting portion disposed on the reflecting surface side.

  In the vehicular lamp according to the first aspect, the light emitted from the light emitting diode disposed on the back surface side of the reflecting surface of the reflector enters the light guide and is guided. The light guide part penetrates the reflector. And the light emission part arrange | positioned at the reflective surface side of a reflector light-emits.

  Thus, although the light emitting part is disposed on the reflecting surface side of the reflector, the light emitting diode that is easily affected by heat is disposed on the back surface side of the reflecting surface of the reflector. Therefore, even if the light source part of the headlamp bulb disposed on the reflecting surface side of the reflector generates heat, the light emitting diode is not easily affected by heat. Therefore, the influence by the heat to a light emitting diode, for example, the fall of a lifetime, or a disconnection is prevented.

  Therefore, the vehicular lamp of the present invention can include both a headlamp bulb that generates heat and a light-emitting diode that is easily affected by heat without taking measures against heat dissipation such as a heat sink.

  According to a second aspect of the present invention, there is provided the vehicular lamp according to the first aspect, wherein the light emitting portion is light-transmitted in a direction intersecting with a traveling direction of the light incident on and guided to the light guide portion. A light diffusing means for diffusing light is provided.

  In the vehicular lamp according to the second aspect, since the light diffusing means is provided in the light emitting portion, the light is also diffused in the direction intersecting the light traveling direction. Therefore, the light emitting unit irradiates light over a wide area.

  According to a third aspect of the present invention, there is provided the vehicular lamp according to the second aspect, wherein the light diffusing unit is formed at a front end of the light guide portion in the traveling direction and is concave toward the traveling direction. And a conical portion fitted into the conical hole.

  In the vehicular lamp according to claim 3, since the light is reflected by the side surface of the conical portion fitted in the conical hole formed at the tip of the light guide portion, the light is reflected in a direction intersecting the traveling direction of the light. Diffused. Therefore, the light emitting unit irradiates light over a wide area.

  According to a fourth aspect of the present invention, there is provided the vehicular lamp according to the second aspect of the present invention, wherein the light diffusing means is formed at the front end of the light guide portion in the traveling direction and is concave toward the traveling direction. It has a frustoconical hole having a substantially frustoconical shape, and a frustoconical part that fits into the frustoconical hole.

  In the vehicular lamp according to claim 4, the light is reflected by the side surface of the truncated cone part that is fitted in the truncated cone hole formed at the tip of the light guide part, so that the light intersects the traveling direction of the light. Light is diffused. Furthermore, with the plane portion of the apex portion of the truncated cone portion as the light incident surface, light in this region enters the truncated cone portion and is irradiated in the traveling direction side. Therefore, irradiation in the traveling direction of light can be made brighter.

  According to a fifth aspect of the present invention, there is provided the vehicular lamp according to the fourth aspect of the present invention, wherein the frustoconical hole is formed with a cylindrical cylindrical hole that is concave toward the traveling direction at the bottom of the hole. The frustoconical portion is characterized in that a columnar columnar portion that is convex toward the traveling direction and that enters the cylindrical hole is formed.

  In the vehicular lamp according to the fifth aspect, light enters from the cylindrical part of the truncated cone part. Then, the light is reflected on the side surface of the cylindrical portion, so that the cylindrical portion itself appears to emit light. For this reason, the light diffusibility is further improved and the light condensing is activated, so that the light becomes brighter.

  The vehicular lamp according to claim 6 is the configuration according to any one of claims 2 to 5, wherein the light diffusing means is formed at a front end of the light guide portion in the traveling direction, It has a lens portion that is convex in the direction.

  In the vehicular lamp according to claim 6, since the lens portion that is convex in the traveling direction is formed in the light guide portion, the light is refracted by the lens portion, so that the light traveling direction is wide. Irradiate.

  The light-emitting diode bulb according to claim 7, a light-emitting diode of a light-emitting source, a light guide unit that receives and guides light emitted from the light-emitting diode, and a side opposite to the light input side of the light guide unit A light emitting part provided at the tip of the light source, and a light diffusing means provided in the light emitting part for diffusing light in a direction intersecting the traveling direction of the light incident on and guided to the light guide part. And the light diffusing means is formed at the tip of the light guide portion in the traveling direction, and is formed in a truncated cone-shaped hole having a substantially truncated cone shape that is concave toward the traveling direction, and a hole bottom portion of the truncated cone-shaped hole. A cone that fits into the frustoconical hole that is formed and has a cylindrical cylindrical hole that is concave toward the traveling direction and a columnar column that is convex toward the traveling direction and enters the cylindrical hole. A trapezoidal part and a convex shape in the traveling direction formed in the frustoconical part It is characterized by having turned the lens portions, the.

  In the light-emitting diode bulb according to claim 7, light emitted from the light-emitting diode enters the light guide and is guided. And the light emission part provided in the front-end | tip part on the opposite side to the light-incidence side light-emits. That is, the light emitting diode and the light emitting part are separated. Therefore, for example, even if the light emitting unit is disposed in a place that is easily affected by heat, the light emitting diode is less susceptible to heat.

  Moreover, the light-emitting part of the light guide part is configured such that the frustoconical part fits into the frustoconical hole. Therefore, the light is diffused in the direction intersecting with the traveling direction of the light by the light being reflected by the side surface of the truncated cone portion. Further, the cylindrical portion is inserted into a cylindrical hole formed in the hole bottom portion. Therefore, the light incident on the cylindrical portion is reflected on the side surface of the cylindrical portion, so that the cylindrical portion appears to emit light. Further, since the lens portion that is convex in the traveling direction is formed in the truncated cone portion, the light that has entered the truncated cone portion is refracted by the lens portion and irradiates a wide region on the traveling direction side of the light. . That is, the light-emitting diode bulb has excellent light diffusibility.

  As described above, the vehicular lamp according to claim 1 includes both a headlamp bulb that generates heat and a light-emitting diode that is easily affected by heat without taking measures against heat dissipation such as a heat sink. It has the excellent effect that it becomes possible.

  According to the vehicular lamp according to the second aspect of the present invention, the light is diffused in the direction intersecting with the traveling direction of the light, so that it has an excellent effect that it can irradiate a wide range.

  According to the vehicular lamp according to the third aspect, the light is reflected and diffused in the direction intersecting with the traveling direction of the light, so that it has an excellent effect that a wide range can be irradiated.

  According to the vehicular lamp according to the fourth aspect of the present invention, there is an excellent effect that the irradiation in the traveling direction of light can be brightened.

  According to the vehicle lighting device of the fifth aspect, since the cylindrical portion is irradiated as if it is emitting light, it has an excellent effect of being brighter.

  According to the vehicle lamp of the sixth aspect, it is possible to irradiate a wide range of the light traveling direction by the lens unit.

  The light-emitting diode bulb according to claim 7 is hardly affected by heat and has excellent light diffusibility.

  First, a light emitting diode bulb including a light emitting diode as a light emitting source will be described.

  A light-emitting diode bulb 100 according to the first embodiment will be described with reference to FIG.

  As shown in FIG. 1, the light emitting diode valve 100 includes a light emitting diode 150 and a light guide unit 110 as main components.

  The light emitting diode 150 includes a LED chip 152 that is pn-junction and emits light when a forward current flows. The LED chip 152 is provided on one frame 156 and connected to the other frame 154 by a bonding wire 158. And it is enclosed with the fixing | fixed part 160 which consists of a synthetic resin which has translucency. Note that the root portion of one frame 156 and the root portion of the other frame 154 protrude from the fixing portion 160.

  A columnar (rod-shaped) light guide section 110 is joined to the fixing section 160 of the light emitting diode 150. The light guide unit 110 is made of a synthetic resin having translucency such as acrylic. In addition, let the light emitting diode 150 side of the light guide part 110 be the light incident side or the rear side, and let the opposite side to the light incident side be the front end side or the front side.

  When a voltage is applied between the frame 154 and the frame 156, the LED chip 152 of the light emitting diode 150 emits light. The emitted light travels through the light guide unit 110 toward the tip side. The tip surface 110A irradiates light toward the front side. Note that the front end surface 110 </ b> A that emits light is used as the light emitting unit 112.

  Next, the operation of this embodiment will be described.

  In the light emitting diode bulb 100, the light emitting diode 150 and the light emitting section 112 of the light guide section 110 are separated. Therefore, even if the light emitting unit 112 is disposed and heated in a place that is easily affected by heat, the light emitting diode 150, particularly the LED chip 152, is affected by the heat to prevent a problem such as a decrease in life. Can do.

  Next, the light-emitting diode bulb 200 according to the second embodiment will be described with reference to FIGS.

  As shown in FIG. 2, the light emitting diode bulb 200 includes a light emitting diode 150 and a light guide unit 210 as main components. Since the light emitting diode 150 has the same configuration as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 2 and FIG. 3, a conical hole 220 that is recessed toward the light traveling direction (light incident side) is formed at the distal end portion of the light guide unit 210. A conical cone portion 230 is fitted and joined to the conical hole 220.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 2, when the LED chip 152 of the light emitting diode 150 is caused to emit light, the emitted light travels through the light guide unit 210 toward the tip side. The light is reflected by the conical side surface 230C of the conical portion 230 and diffuses in a direction crossing the light traveling direction. And the front-end | tip part side surface 210B of the front-end | tip part of the light guide part 210 light-emits.

  The light at the apex portion 230B of the cone goes straight as it is and enters the cone portion 230. And the front end surface 230A of the cone part 230 emits light.

  That is, not only the bottom surface 230A of the conical portion 230 (the front end surface of the light guide unit 210) radiates light forward, but also the direction in which the front end side surface 210B of the front end portion of the light guide unit 210 intersects the light traveling direction. Irradiate light. In addition, let the light emission part 212 be the front-end | tip part of the light guide part 210 including the bottom face 230A and front-end | tip part side surface 210B which light-emit.

  In this way, the light emitting unit 212 irradiates not only the front side but also the direction intersecting the traveling direction. That is, it irradiates a wide range.

  Similar to the light emitting diode bulb 100 of the first embodiment, the light emitting diode bulb 200 of the present embodiment also has the light emitting diode 150 and the light emitting portion 212 of the light guide portion 210 separated from each other. Therefore, even if the light emitting unit 212 is heated, the light emitting diode 150, in particular, the LED chip 152, is affected by the heat, so that it is possible to prevent problems such as a decrease in life.

  Next, a light-emitting diode valve 300 according to a third embodiment will be described with reference to FIGS.

  As shown in FIG. 4, the light-emitting diode valve 300 includes a light-emitting diode 150 and a light guide unit 310 as main components. Since the light emitting diode 150 has the same configuration as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 5, a frustoconical hole 320 that is recessed toward the light traveling direction (to the light incident side) is formed on the distal end side of the light guide unit 310. The frustoconical shape is a shape obtained by cutting and flattening the upper part of the cone, and is trapezoidal when viewed from the side. A flat portion at the top of the cone of the frustoconical hole 320, that is, the bottom of the hole is defined as a bottom surface portion 322.

  The frustoconical portion 330 is fitted into and joined to the frustoconical hole 320. The frustoconical portion 330 is formed with a planar plane portion 332 corresponding to the bottom surface portion 322 of the frustoconical hole 320. Further, a lens portion 336 that is convex in the light traveling direction (front end side) is formed. The lens unit 336 is a balloon-shaped diffusion lens.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 4, when the LED chip 152 of the light emitting diode 150 is caused to emit light, the emitted light travels through the light guide unit 310 toward the tip side. Then, the light is reflected by the side surface 330C of the frustoconical portion 330 and diffuses in a direction intersecting with the traveling direction of the light. Then, the distal end side surface 310B on the distal end side of the light guide unit 310 emits light.

  The light in the region of the plane portion 332 of the truncated cone portion 330 goes straight and enters the truncated cone portion 330 (the plane portion 332 serves as a light incident surface). Then, the diffusion surface 336A on the surface of the lens portion 336 of the truncated cone portion 330 emits light. As shown in FIG. 6, since the lens portion 336 of the truncated cone portion 330 is a balloon-shaped diffusing lens, the light incident on the truncated cone portion 330 is refracted. The diffusion surface 336A on the surface of the lens portion 336 irradiates light on a wide area on the front side.

  The tip portion of the light guide unit 310 including the tip side surface 310B that emits light and the diffusion surface 336A is referred to as a light emitting unit 312.

  As described above, the light emitting unit 312 irradiates light in a direction intersecting the traveling direction and irradiates a wide area on the front side. That is, light is applied to a wider range.

  Similar to the light emitting diode bulb 100 of the first embodiment, the light emitting diode bulb 300 of the present embodiment also has the light emitting diode 150 and the light emitting portion 312 of the light guide portion 310 separated from each other. Therefore, even if the light emitting unit 312 is heated, the light emitting diode 150, in particular, the LED chip 152, is affected by the heat, so that it is possible to prevent problems such as a reduction in the lifetime.

  Next, a light-emitting diode valve 400 according to a fourth embodiment will be described with reference to FIGS.

  As shown in FIG. 7, the light emitting diode bulb 400 includes a light emitting diode 150 and a light guide unit 410 as main components. Since the light emitting diode 150 has the same configuration as that of the first embodiment, description thereof is omitted.

  As shown in FIG. 8, a frustoconical hole 420 that is recessed toward the light traveling direction (to the light incident side) is formed at the distal end portion of the light guide unit 410. Further, a cylindrical hole 422 having a cylindrical shape with the traveling direction of light as an axial direction is formed in the hole bottom portion of the truncated conical hole 420.

  The frustoconical portion 430 is fitted and joined to the frustoconical hole 420. The truncated cone part 430 is formed with a columnar column part 432 that enters the cylindrical hole 422 of the truncated cone hole 420. A lens portion 436 that is convex in the light traveling direction is formed on the tip side. The lens unit 436 is a balloon-shaped diffusion lens.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 7, when the LED chip 152 of the light emitting diode 150 is caused to emit light, the emitted light travels through the light guide unit 410 toward the distal end side. Then, the light is reflected by the side surface 430C of the frustoconical portion 430 and diffused in a direction intersecting with the traveling direction of the light. Then, the distal end side surface 410B on the distal end side of the light guide unit 410 emits light.

  The light in the region of the bottom surface 432A of the cylindrical portion 432 goes straight as it is and enters the frustoconical portion 430 (the bottom surface 432A (see FIG. 8) of the cylindrical portion 432 serves as a light incident surface). Then, the diffusion surface 436A on the surface of the lens portion 436 emits light. As shown in FIG. 9, since the lens portion 436 is a balloon-shaped diffusion lens, light is refracted. Therefore, the diffusion surface 436A on the surface of the lens portion 436 irradiates a wide area on the front side.

  Furthermore, the light incident from the bottom surface portion 432A of the cylindrical portion 432 is reflected by the side surface 432B of the cylindrical portion 432, and it appears as if the cylindrical portion 432 itself emits light. For this reason, the light diffusibility is further improved and the light condensing is activated, so that it becomes brighter than the third embodiment.

  The tip portion of the light guide unit 410 including the tip side surface 410B that emits light and the diffusion surface 436A is referred to as a light emitting unit 412.

  Similar to the light emitting diode bulb 100 of the first embodiment, the light emitting diode bulb 400 of the present embodiment also has the LED chip 152 of the light emitting diode 150 and the light emitting portion 412 of the light guide portion 410 separated from each other. Therefore, even when the light emitting unit 412 is heated, the light emitting diode 150, in particular, the LED chip 152, is affected by the heat, so that it is possible to prevent problems such as a decrease in life.

  Next, a clearance lamp integrated headlamp 10 as a vehicular lamp provided in an automobile or the like will be described with reference to FIG. The clearance lamp integrated headlamp 10 may be simply referred to as “headlamp 10”.

  As shown in FIG. 10, a pair of left and right headlamps 10 are arranged at the lower front end of the front body of the vehicle. In the figure, the arrow UP indicates the upward direction of the headlamp 10, and the arrow FR in the figure indicates the forward direction of the headlamp 10, that is, the forward direction of the vehicle.

  The headlamp 10 includes a bowl-shaped reflector 12 having a truncated cone shape as a whole and having a side surface curved outward. The conical inner surface (vehicle front side surface) of the reflector 12 is a reflecting surface 12A that reflects light. In addition, a transparent lens 14 is put on the opening portion of the reflector 12 on the vehicle front side.

  A headlamp bulb 50 is provided at the central portion (the top portion of the truncated cone) of the reflector 12. The headlamp bulb 50 is attached to the housing 20 provided outside the reflector 12 (vehicle rear side) via a socket 56. The light source portion 54 of the headlamp bulb 50 is disposed on the reflecting surface 12A side of the reflector 12.

  As the headlamp bulb 50, an incandescent lamp or a halogen lamp having a filament 52 in the light source section 54 as shown in the figure is used. Alternatively, an HID (High Intensity Discharge) lamp having no filament can also be used.

  In the headlamp 10, the light-emitting diode bulb 400 of the fourth embodiment is disposed above the headlamp bulb 50 as a clearance lamp bulb. The light-emitting diode bulb 400 is attached to the housing 20 provided outside the reflector 12 (vehicle rear side) via a socket 402. In addition, the light guide part 410 of the light emitting diode bulb 400 is inserted through the through hole 18 of the reflector 12 (the light guide part 410 passes through the reflector 12). A light emitting portion 412 (see FIGS. 7 and 9) at the tip portion protrudes from the reflector 12 and is disposed on the reflecting surface 12A side of the reflector 12. However, the light emitting diode 150 is disposed on the back surface 12B side of the reflecting surface 12A. The gap between the through hole 18 and the light guide unit 410 is sealed with a seal member (not shown).

  The light emitted from the headlamp bulb 50 and the light emitting diode bulb 400 is reflected directly and by the reflecting surface 12A of the inner surface of the reflector 12, and irradiates the front of the vehicle through the lens 14.

  Next, the operation of this embodiment will be described.

  The light source unit 54 of the headlamp bulb 50 shown in FIG. 10 generates heat by emitting light. Therefore, the space 19 surrounded by the reflecting surface 12A of the reflector 12 and the lens 14 becomes high temperature. However, the opposite side (outside) of the reflecting surface 12A of the reflector 12 does not reach a high temperature.

  As described above, in the light emitting diode bulb 400, the light emitting portion 412 at the tip portion of the light guide portion 410 is disposed on the reflecting surface 12A side of the reflector 12, that is, in the space portion 19 where the temperature is high. However, the light emitting diode 150 is disposed on the back surface 12B side of the reflecting surface 12A that does not reach a high temperature (the light emitting diode 150 is disposed outside the space portion 19). That is, the headlamp 10 has a configuration in which the light emitting diode 150 is not affected by heat even when the space portion 19 in which the light emitting portion 412 of the light emitting diode bulb 400 is disposed becomes high temperature.

  The light emitting diode 150 has advantages such as low cost, long life, and low failure probability. However, the light emitting diode 150 is vulnerable to “heat”, and its life is extremely reduced when affected by heat. Moreover, it may be disconnected by heat.

  However, as described above, since the light-emitting diode 150 is configured not to be affected by heat in the headlamp 10, problems such as a decrease in life and disconnection due to the influence of heat are prevented. For this reason, the headlamp 10 can include the light emitting diode bulb 400 as a clearance lamp without taking measures against heat dissipation such as a heat sink.

  As shown in FIG. 11, by disposing the light emitting diode 150 on the outside of the housing 20, the light emitting diode 150 is further moved away from the space portion 19 and a heat insulating effect by the housing 20 is added. The influence by can be further reduced.

  The light emitting diode bulb 400 is applied to the headlamp 10 in the above embodiment, but is not limited thereto. The light emitting diode bulb 400 can also be applied to vehicle lamps other than headlamps. Furthermore, the light-emitting diode bulb 400 can be applied to devices other than vehicular lamps.

  In the light emitting diode bulb 400, since the light emitting diode 150 and the light emitting portion 412 of the light guide portion 410 are separated from each other, the light emitting diode 150, in particular, the LED chip 152 is affected by heat, and the lifetime is reduced. Can be prevented. Therefore, even if it arrange | positions in the place where the light emission part 412 becomes high heat like the said embodiment, a malfunction does not arise. For example, the light emitting unit 412 can be disposed near the air outlet of the air conditioner.

  Moreover, although the headlamp 10 illustrated in FIGS. 10 and 11 includes the light-emitting diode bulb 400 of the fourth embodiment, the present invention is not limited to this.

  Like the headlamp 21 shown in FIG. 13, the light emitting diode bulb 100 (see FIG. 1) of the first embodiment may be provided as a clearance lamp bulb. Furthermore, as shown in the headlamp 31 shown in FIG. 14, the light emitting diode bulb 200 (see FIG. 2) of the second embodiment may be provided as a clearance lamp bulb, or the headlamp 41 shown in FIG. As described above, the light emitting diode bulb 300 (see FIG. 4) of the third embodiment may be provided as a clearance lamp bulb. As shown in FIGS. 13 to 15, the light emitting portions 112, 212, and 312 are all disposed on the reflecting surface 12 </ b> A side of the reflector 12, that is, in the space portion 19, and the light emitting diode 150 is the back surface of the reflecting surface 12 </ b> A. It is the structure arrange | positioned by the 12B side.

  Moreover, although all the light guide parts 110, 210, 310, and 410 were formed of the synthetic resin which has translucency, such as an acrylic product, it is not limited to this. Any material may be used as long as the light emitted from the light emitting diode 150 can be guided. For example, glass may be used. Since glass has low thermal conductivity, the influence of heat on the light emitting diode 150 can be further reduced.

  Further, the light-emitting diode valve 100 (see FIG. 1) of the first embodiment, the light-emitting diode valve 200 (see FIG. 2) of the second embodiment, the light-emitting diode valve 300 (see FIG. 4) of the third embodiment, and the fourth embodiment. In the light emitting diode bulb 400 (see FIG. 7), the light emitting diode 150 and the light guide portions 110, 210, 310, and 410 are integrated with each other, but the present invention is not limited thereto. The light emitting diode 150 and the light guide portions 110, 210, 310, and 410 may be separated from each other.

  For example, as shown in FIG. 12, a light guide part 510 having substantially the same configuration as that of the light emitting diode valve 100 of the first embodiment is provided, but the light incident surface 510 </ b> C and the tip part 150 </ b> A of the light emitting diode 150 are separated. Such a configuration may be used (the interval L is separated in FIG. 12).

It is a figure which shows typically the schematic structure of the light emitting diode valve | bulb of 1st embodiment. It is a figure which shows typically the schematic structure of the light emitting diode valve | bulb of 2nd embodiment. It is an exploded view which shows typically the light emission part of the light emitting diode valve | bulb of 2nd embodiment. It is a figure which shows typically the schematic structure of the light emitting diode valve | bulb of 3rd embodiment. It is an exploded view which shows typically the light emission part of the light emitting diode valve | bulb of 3rd embodiment. It is a figure which shows typically the light emission part of the light emitting diode valve | bulb of 3rd embodiment. It is a figure which shows typically the schematic structure of the light emitting diode valve | bulb of 4th embodiment. It is an exploded view which shows typically the light emission part of the light emitting diode valve | bulb of 4th embodiment. It is a figure which shows typically the light emission part of the light emitting diode valve | bulb of 4th embodiment. It is a figure which shows typically the clearance lamp integrated headlamp provided with the light emitting diode bulb | bulb of 4th embodiment as a clearance lamp. It is a figure which shows typically the modification of the clearance lamp integrated headlamp shown in FIG. It is a figure which shows an example of the light emitting diode valve | bulb in which the light emitting diode and the light guide part are separated. It is a figure which shows typically the clearance lamp integrated headlamp provided with the light emitting diode bulb | bulb of 1st embodiment as a clearance lamp. It is a figure which shows typically the clearance lamp integrated headlamp provided with the light emitting diode bulb | bulb of 2nd embodiment as a clearance lamp. It is a figure which shows typically the clearance lamp integrated headlamp provided with the light emitting diode bulb | bulb of 3rd embodiment as a clearance lamp.

Explanation of symbols

10 Clearance lamp integrated headlamp (vehicle lamp)
11 Clearance lamp integrated headlamp (vehicle lamp)
12 Reflector 12A Reflective surface 12B Back surface 21 Clearance lamp integrated headlamp (vehicle lamp)
31 Clearance lamp integrated headlamp (vehicle lamp)
41 Clearance lamp integrated headlamp (vehicle lamp)
DESCRIPTION OF SYMBOLS 50 Headlamp bulb 54 Light source part 110 Light guide part 112 Light emission part 150 Light emitting diode 210 Light guide part 212 Light emission part 220 Conical hole 230 Conical part 310 Light guide part 312 Light emission part 320 Frustum trapezoidal hole 330 Cone trapezoid part 336 Lens part 400 Light emission Diode valve 410 Light guide portion 412 Light emitting portion 420 Frustum hole 422 Cylindrical hole 430 Frustum portion 432 Column portion 436 Lens portion

Claims (7)

A reflector having a reflective surface for reflecting light;
A headlamp bulb in which a light source is disposed on the reflecting surface side of the reflector;
A light emitting diode disposed on the back side of the reflecting surface of the reflector;
The light emitted from the light emitting diode is incident and guided, and a light guide unit penetrating the reflector;
A light emitting unit provided in the light guide unit and disposed on the reflecting surface side of the reflector;
A vehicular lamp characterized by comprising:   The light emitting unit is provided with a light diffusing unit that diffuses light in a direction that intersects a traveling direction of light that is incident on and guided to the light guide unit. Vehicle lamps. The light diffusing means is
A substantially conical conical hole formed at the distal end of the light guide portion in the traveling direction and concave toward the traveling direction;
A conical portion that fits into the conical hole;
The vehicular lamp according to claim 2, wherein the vehicular lamp is provided. The light diffusing means is
A frustoconical hole having a substantially frustoconical shape that is formed at the front end of the light guide section in the traveling direction and is concave toward the traveling direction;
A frustoconical portion that fits into the frustoconical hole;
The vehicular lamp according to claim 2, further comprising: The frustoconical hole is
A cylindrical cylindrical hole that is concave toward the traveling direction is formed in the hole bottom portion,
The frustoconical part is
The vehicular lamp according to claim 4, wherein a columnar columnar portion that is convex toward the traveling direction and enters the cylindrical hole is formed.   The said light-diffusion means has the lens part which was formed in the said advancing direction front-end | tip of the said light guide part, and became convex shape in the said advancing direction, The any one of Claims 2-5 characterized by the above-mentioned. The vehicle lamp as described. A light emitting diode of the light source;
A light guide unit that receives and guides light emitted from the light emitting diode;
A light emitting portion provided at a tip portion opposite to the light incident side of the light guide portion;
A light diffusing unit that is provided in the light emitting unit and diffuses light in a direction that intersects a traveling direction of light that has been incident on and guided to the light guide unit;
With
The light diffusing means is
A frustoconical hole having a substantially frustoconical shape that is formed at the front end of the light guide portion in the traveling direction and is concave toward the traveling direction;
A cylindrical cylindrical hole formed in the hole bottom portion of the frustoconical hole, which is concave toward the traveling direction;
A frustoconical portion that fits into the frustoconical hole formed with a cylindrical columnar portion that is convex toward the traveling direction and enters the cylindrical hole;
A lens part formed in the truncated cone part and convex in the traveling direction;
A light-emitting diode bulb characterized by comprising:

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