JP6078276B2 - Lamp unit - Google Patents

Description

  The present invention relates to a lamp unit used for a vehicular lamp.

  Conventionally, a vehicle headlamp using a semiconductor light emitting element such as an LED as a light source is known. For example, a lamp unit has been devised that reflects light emitted from a semiconductor light emitting element toward the front of the vehicle with a reflector and irradiates the front of the vehicle with a projection lens (see Patent Document 1). Further, such a lamp unit is provided with a heat sink for dissipating heat generated by the light emitting element.

JP 2012-18840 A

  However, depending on the shape of the lamp unit, sufficient heat dissipation may not be obtained only by heat dissipation from the heat sink.

  This invention is made | formed in view of such a condition, The place made into the objective is to provide the technique which improves the heat dissipation of a lamp unit.

  In order to solve the above-described problems, a lamp unit according to an aspect of the present invention is a lamp unit used in a vehicular lamp, and the light emitting element and at least a part of light emitted from the light emitting element are used as a light source image to the front of the lamp. A projection lens that projects, and a heat dissipating member that is disposed around a space including an optical path between the light emitting element and the projection lens and that radiates heat generated by the light emitting element to the outside of the lamp unit. The heat dissipating member has a penetrating part formed so as to communicate between the outside of the lamp unit and the space, and a heat dissipating fin provided so as to cross the opening of the penetrating part.

  According to this aspect, since the air inside the lamp unit heated by the heat generated by the light emitting element can be discharged to the outside of the lamp unit via the penetration part of the heat radiating member, the heat dissipation of the lamp unit can be improved. Moreover, since the radiation fin is provided in the opening part of the penetration part, the heat dissipation from a radiation fin can be improved with the air which has passed the penetration part.

  The penetrating part may be formed in the vertical direction. Thereby, heat can be easily released to the outside of the lamp unit by the natural rise of the heated air.

  The heat dissipation member has three points: the upper or lower end of the projection lens, the rear focal point of the projection lens, and the intersection of the line extending from the upper or lower end of the projection lens to the rear of the lamp and the line extending from the rear focal point in the vertical direction. You may be comprised so that at least one part of a penetration part and a radiation fin may arrange | position in the area | region of the connected right triangle. Thereby, it is possible to prevent the heat dissipation member from blocking the optical path from the light emitting element to the projection lens. In addition, when the lamp unit is viewed from the front, the heat dissipating member is arranged so as to be hidden behind the projection lens, so that the size reduction can be realized in the front view of the lamp unit.

  The heat radiating member may have a rear penetrating portion communicating with the space above and below the heat radiating member on the rear side of the lamp of the light emitting element. Thereby, for example, when the lamp unit is disposed in the lamp chamber, the upper and lower spaces of the heat dissipation member can be communicated with each other by the rear penetrating portion. Therefore, even if the distance between the lamp chamber and the heat radiating member is reduced, the flow of air in the lamp chamber is ensured, so that the length of the vehicular lamp including the lamp chamber in the front-rear direction can be shortened.

  Another embodiment of the present invention is also a lamp unit. The lamp unit is a lamp unit used for a vehicle lamp, and includes a first light emitting element, a second light emitting element arranged at a position different from the first light emitting element, a first light emitting element, A space including a projection lens that projects at least part of light emitted from at least one of the second light emitting elements as a light source image to the front of the lamp, and an optical path between the first light emitting element and the second light emitting element and the projection lens. And a first heat dissipating member that dissipates heat generated by the first light emitting element to the outside of the lamp unit, and a heat dissipated by the second light emitting element that is disposed around the space to the outside of the lamp unit. A second heat radiating member for radiating heat. The first heat dissipating member is provided so as to cross the first penetrating portion formed so as to communicate between the outside of the lamp unit and the space and the opening of the first penetrating portion. The fin has a second penetrating portion formed on the rear side of the lamp of the first light emitting element so as to communicate the upper and lower spaces of the first heat radiating member. The second heat radiating member has a third penetrating portion formed on the rear side of the lamp of the second light emitting element so as to communicate with the upper and lower spaces of the second heat radiating member. The opening of the part and the opening of the second penetrating part are configured to face each other.

  According to this aspect, the air inside the lamp unit heated by the heat generated by the first light emitting element and the second light emitting element is discharged to the outside of the lamp unit via the first through part of the first heat radiating member. Therefore, the heat dissipation of the lamp unit can be improved. Moreover, since the 1st radiation fin is provided in the opening part of the 1st penetration part, the heat dissipation from a 1st radiation fin can be improved with the air which passed the 1st penetration part. For example, when the lamp unit is disposed in the lamp chamber, the first and second heat dissipating members and the upper and lower spaces of the second heat dissipating member can be communicated with each other by the second penetrating portion and the third penetrating portion. Therefore, even if the distance between the rear ends of the first heat radiating member and the second heat radiating member and the member constituting the lamp chamber is reduced, the air flow in the lamp chamber is ensured. The length of the lamp in the front-rear direction can be shortened.

  It should be noted that any combination of the above-described constituent elements and a representation obtained by converting the expression of the present invention between a method, an apparatus, a system, and the like are also effective as an aspect of the present invention.

  According to the present invention, the heat dissipation of the lamp unit can be improved.

It is sectional drawing of the vehicle headlamp using the lamp unit which concerns on 1st Embodiment. It is a disassembled perspective view of the lamp unit which concerns on 1st Embodiment. It is a top view of the heat radiating member concerning a 1st embodiment. It is sectional drawing of the vehicle headlamp using the lamp unit which concerns on 2nd Embodiment. It is sectional drawing of the vehicle headlamp using the lamp unit which concerns on 3rd Embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. Further, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  FIG. 1 is a cross-sectional view of a vehicular headlamp 100 using a lamp unit 10 according to a first embodiment. FIG. 2 is an exploded perspective view of the lamp unit 10 according to the first embodiment. FIG. 3 is a top view of the heat dissipation member according to the first embodiment.

  As shown in FIG. 1, the vehicle headlamp 100 includes a lamp body 12 having a recess opened in front of the lamp, and a cover 14 made of a transparent material that closes the opening surface of the lamp body 12. An internal space formed by the body 12 and the cover 14 is formed as a lamp chamber 16.

  A lamp unit 10 is disposed in the lamp chamber 16. As shown in FIG. 1, the lamp unit 10 is attached to a substantially central portion of a metal support member 18. A first aiming screw 20 is attached to the upper part of the metal support member 18, and a second aiming screw 22 is attached to the lower part of the metal support member 18. The metal support member 18 is tiltably supported by the lamp body 12 by the first aiming screw 20 and the second aiming screw 22. Then, by rotating the first aiming screw 20 or the second aiming screw 22, the metal support member 18 is tilted, and the lamp unit 10 is tilted accordingly, and the optical axis adjustment (aiming adjustment) of the illumination light is performed. Is called.

  The lamp unit 10 includes a first LED 24 that is a first light emitting element, a second LED 26 that is a second light emitting element disposed at a position different from the first LED 24, a first LED 24, and a second LED 24. Around a space including a projection lens 28 that projects at least part of light emitted from at least one of the LEDs 26 as a light source image to the front of the lamp, and an optical path between the first LED 24 and the second LED 26 and the projection lens 28. Heat that is disposed around the space 30 and the upper bracket 32 as a first heat radiating member that is disposed and radiates heat generated by the first LED 24 to the lamp chamber 16 outside the lamp unit 10. And a lower bracket 34 as a second heat radiating member that radiates heat to the lamp chamber 16 outside the lamp unit 10.

  The first LED 24 is fixed to the lower surface side of the upper bracket 32 via the first substrate 36. The second LED 26 is fixed to the upper surface side of the lower bracket 34 via the second substrate 38.

  The projection lens 28 is provided at the front end of the lamp unit 10. The projection lens 28 is a plano-convex aspheric lens having a convex front surface and a flat rear surface, and projects a light source image formed on the rear focal plane in front of the vehicle headlamp 100 as an inverted image. . The projection lens 28 is arranged so that its optical axis Ax is substantially parallel to the front-rear direction of the vehicle on which the vehicle headlamp 100 is provided. The projection lens 28 is laser welded to the lens holder 40. The lens holder 40 is fixed to the lower bracket 34.

  As shown in FIG. 1, an upper bracket 32 and a lower bracket 34 are provided as heat radiating members behind the projection lens 28. The lower bracket 34 is substantially rectangular in a side view. On the other hand, the upper bracket 32 is substantially Z-shaped in a side view and is provided above the lower bracket 34. When the upper bracket 32 and the lower bracket 34 are combined, a space 30 is formed between the projection lens 28 and the upper bracket 32 and the lower bracket 34. The upper bracket 32 and the lower bracket 34 are fixed to the metal support member 18.

  A second substrate 38 is provided on the upper surface 34 a of the lower bracket 34, and a second LED 26 is provided on the second substrate 38. A circuit for supplying electric power to the second LED 26 and a support part for supporting the second LED 26 are formed on the second substrate 38. The second LED 26 is arranged such that the light emitting surface faces vertically upward. Further, the second LED 26 is arranged so that the light emitting surface is located below the optical axis Ax.

  Above the second LED 26, a second reflector 42 that reflects the light emitted from the second LED 26 toward the projection lens 28 is disposed. The second reflector 42 is disposed so as to face the second LED 26 across the optical axis Ax of the projection lens 28, and is fixed to the upper bracket 32. The second reflector 42 is configured to have an elliptical reflecting surface having a focal point at the emission center of the second LED 26 and the rear focal point F of the projection lens 28. The light from the second LED 26 reflected by the second reflector 42 is mainly applied to a region below the horizontal line in front of the vehicle.

  A first substrate 36 is provided in a portion of the upper bracket 32 in front of the second reflector 42, and the first LED 24 is provided on the first substrate 36. A circuit for supplying electric power to the first LED 24 and a support part for supporting the first LED 24 are formed on the first substrate 36. The first LED 24 is disposed such that the light emitting surface faces slightly rearward from the vertically lower side. Further, the first LED 24 is arranged such that the light emitting surface is positioned above the optical axis Ax. Therefore, in the present embodiment, each of the second substrate 38 and the first substrate 36 includes the second LED 26 so that the second LED 26 and the first LED 24 are arranged with the optical axis Ax of the projection lens 28 interposed therebetween. Each of the first LEDs 24 is supported.

  A first reflector 44 that reflects light emitted from the first LED 24 toward the projection lens 28 is disposed below the first LED 24. The first reflector 44 is disposed so as to face the first LED 24 across the optical axis Ax of the projection lens 28, and is a recess formed in a portion of the lower bracket 34 that is ahead of the second LED 26. It is being fixed to 34b. Therefore, in the present embodiment, the first reflector 44 is disposed at a position closer to the projection lens 28 than the second LED 26. The first reflector 44 is configured to have an elliptical reflecting surface having a focal point at the light emission center of the first LED 24 and the rear focal point F of the projection lens 28. The light from the first LED 24 reflected by the first reflector 44 is mainly applied to a region above the horizontal line in front of the vehicle.

  The shade 46 is a plate-like member disposed between the first reflector 44 and the projection lens 28, and the upper end edge thereof is formed in a shape corresponding to the cut line of the low beam light distribution pattern. In the present embodiment, the shade 46 is configured to be movable between a shielding position where a part of light from the second reflector 42 is shielded by a shade actuator 48 and an open position where the shade 46 is not shielded. The shade actuator 48 can be constituted by a motor or a solenoid, and is fixed to the front end portion of the lower bracket 34.

  FIG. 1 illustrates a state where the shade 46 is in the shielding position. When in the shielding position, the shade 46 is erected in the vertical direction, and the upper edge of the shade 46 is located in the vicinity of the rear focal point F of the projection lens 28. When the shade 46 is in the shielding position, the light from the second LED 26 reflected by the second reflector 42 is partially shielded by the shade 46 and emitted from the projection lens 28. When the shade actuator 48 is driven from the state of FIG. 1, the shade 46 rotates forward of the lamp and finally becomes substantially horizontal with the optical axis Ax. In this state, the shade 46 is in the open position, and the light from the second reflector 42 is emitted from the projection lens 28 without being shielded by the projection lens 28.

  Next, a light distribution pattern formed by the lamp unit 10 according to the present embodiment will be described.

  As described above, the light emitted from the second LED 26 is reflected by the second reflector 42, passes through the rear focal point F of the projection lens 28 or the vicinity thereof, and is irradiated from the projection lens 28 forward of the lamp. As a result, the light emitted from the second LED 26 is mainly applied to a region below the horizontal line in front of the vehicle.

  On the other hand, as described above, the light emitted from the first LED 24 is reflected by the first reflector 44, passes through the rear focal point F of the projection lens 28 or the vicinity thereof, and is irradiated from the projection lens 28 forward of the lamp. The As a result, the light emitted from the first LED 24 is mainly applied to a region above the horizontal line in front of the vehicle.

  Therefore, according to the lamp unit 10 according to the present embodiment, the high-beam light distribution pattern and the low-beam light distribution pattern are obtained by controlling the lighting or extinguishing of the first LED 24 and the second LED 26 and the position of the shade 46. Can be formed. That is, the second LED 26 and the second substrate 38 function as the low beam LED module 50. The first LED 24 and the first substrate 36 function as a high beam LED module 52. Thus, since formation of two different light distribution patterns can be realized by one lamp unit 10, the vehicle headlamp 100 can be reduced in size.

  In addition, the lamp unit 10 has two LED modules arranged in a relatively small space 30 and tends to increase the amount of heat generation, and therefore has been devised in consideration of further heat dissipation.

  Specifically, in the lamp unit 10, the upper bracket 32 has a first through portion 54 formed so as to communicate between the lamp chamber 16 outside the lamp unit 10 and the space 30, as shown in FIG. And a first radiating fin 56 provided so as to cross the opening 54a of the first penetrating portion 54. Thereby, since the air inside the lamp unit 10 heated by the heat generated by the first LED 24 and the second LED 26 can be discharged to the outside of the lamp unit 10 via the first through portion 54, the lamp unit 10 Heat dissipation can be improved.

  Further, the lamp unit 10 has a second penetrating portion 58 formed on the rear side of the lamp of the first LED 24 so as to communicate the upper and lower spaces of the upper bracket 32. The lower bracket 34 has a third through portion 60 formed on the rear side of the lamp of the second LED 26 so as to communicate the space above and below the lower bracket 34. The opening 60a and the opening 58a of the second through portion 58 are configured to face each other. The first radiating fin 56 is provided so as to cross the opening 58 a of the second through portion 58. The second radiating fins 62 are provided so as to cross the opening 60 a of the third through portion 60.

  Further, since the lamp unit 10 is provided with the first heat radiating fins 56 in the opening 54a of the first penetrating portion 54, the first heat radiating is performed by the air (arrow B) passing through the first penetrating portion 54. The heat dissipation from the fins 56 can be enhanced. Further, when the lamp unit 10 is disposed in the lamp chamber 16, the upper and lower spaces of the upper bracket 32 and the lower bracket 34 can be communicated with each other by the second through portion 58 and the third through portion 60. Therefore, even if the distance between the rear ends of the upper bracket 32 and the lower bracket 34 and the lamp body 12 constituting the lamp chamber 16 is reduced, the air flow in the lamp chamber 16 is ensured. The length of the vehicle headlamp 100 including the length in the front-rear direction can be shortened.

  Further, the first penetrating portion 54 is formed in the vertical direction in the upper part of the lamp unit 10. Thereby, heat can be easily released to the outside of the lamp unit 10 by natural rise of the heated air.

  The upper bracket 32 includes an upper end 28a of the projection lens 28, a rear focal point F of the projection lens 28, a line L1 extending from the upper end 28a of the projection lens 28 to the rear of the lamp, and a line L2 extending from the rear focal point F in the vertical direction. At least a part of the first penetrating portion 54 and the first radiating fin 56 is arranged in a right-angled triangular region R connecting three points of the intersection C. Thereby, it is possible to prevent the upper bracket 32 from blocking the optical path from the first LED 24 or the second LED 26 toward the projection lens 28. In addition, when the lamp unit 10 is viewed from the front, the upper bracket 32 is disposed so as to be hidden by the projection lens, so that the lamp unit 10 can be reduced in size when viewed from the front.

(Second Embodiment)
FIG. 4 is a cross-sectional view of a vehicle headlamp 200 using the lamp unit 110 according to the second embodiment.

  As shown in FIG. 4, the vehicle headlamp 200 includes a lamp body 112 having an opening on the front side of the vehicle, and a translucent cover 114 attached so as to cover the opening of the lamp body 112. The translucent cover 114 is made of translucent resin, glass, or the like. A lamp unit 110 is accommodated in a lamp chamber 113 formed by the lamp body 112 and the translucent cover 114.

  As shown in FIG. 1, the lamp unit 110 is a so-called projector-type optical unit used for a vehicle lamp, and includes a reflector 120, a heat sink 130, and a base portion 150. Further, the lamp unit 110 of the present embodiment is an optical unit capable of forming a low beam light distribution pattern. The lamp unit 110 is disposed so that its optical axis extends in the vehicle front-rear direction, and is connected to the lamp body 112.

  The reflector 120 has a reflection surface 120 a for reflecting light from the light source module 160. The light source module 160 includes, for example, a semiconductor light emitting element 162 such as a light emitting diode (LED), and a substrate 164 that supports the semiconductor light emitting element 162. The heat sink 130, which is a heat radiating member, includes a light source mounting part 132 on which the light source module 160 is mounted, an extension part 134 that extends forward from the front surface of the light source mounting part 132 in the optical axis direction, and a heat radiation fin 135 that is provided on the extension part 134. And have. In addition, the heat sink 130 includes a back surface portion 136 that extends upward from the upper surface of the back surface of the light source mounting portion 132, and heat radiation fins 137 provided on the back surface portion 136. The base portion 150 includes a reflector mounting portion 152 having a reflector mounting surface 152a, a lens mounting portion 154 to which the projection lens 102 is mounted, and a coupling portion (not shown) of the reflector mounting portion 152 and the lens mounting portion 154.

  The heat sink 130 functions as a support member for supporting the reflector 120 and the base portion 150, and the base portion 150 to which the reflector 120 is attached is connected to the heat sink 130. Further, the heat sink 130 has screw holes 138 in the lower back surface of the light source mounting portion 132 and the back surface of the back surface portion 136, and the aiming screw 116 that extends forward through the lamp body 112 and the leveling shaft 118 are screwed. Screwed into the hole 138. In this way, the heat sink 130 is attached to the lamp body 112, whereby the lamp unit 110 is attached to the lamp body 112.

  The leveling shaft 118 is connected to the leveling actuator 119. The vehicle headlamp 200 is configured such that the optical axis of the lamp unit 110 can be adjusted in the horizontal direction and the vertical direction by the aiming screw 116, the leveling shaft 118, and the leveling actuator 119.

  The reflector 120 is a reflecting member in which a reflecting surface 120a made of, for example, a part of a spheroid is formed on the inside. The reflector 120 is more than the projection lens 102 such that the first focal point of the reflective surface 120a is located in the vicinity of the light source module 160 and the second focal point of the reflective surface 120a is located in the vicinity of the rear focal point F of the projection lens 102. It is arranged on the vehicle rear side.

  As described above, the lamp unit 110 according to the present embodiment includes the semiconductor light emitting element 162, the projection lens 102 that projects at least a part of light emitted from the semiconductor light emitting element 162 as a light source image, and the semiconductor light emitting element. And a heat sink 130 disposed around a space 140 including an optical path between the projection lens 102 and the heat sink 130 that dissipates heat generated by the semiconductor light emitting element 162 to the outside of the lamp unit 110. A penetrating part 142 is formed in the extension part 134 of the heat sink 130 so as to communicate between the lamp chamber 113 outside the lamp unit 10 and the space 140. In addition, heat radiating fins 135 are provided so as to cross the opening 142 a of the through portion 142.

  Thereby, since the lamp unit 110 can discharge the air inside the lamp unit 110 heated by the heat generated by the semiconductor light emitting element 162 to the outside of the lamp unit via the through portion 142 of the heat sink 130, the heat dissipation of the lamp unit. Can be improved. Alternatively, the air outside the lamp unit 110 is taken in from below via the through-hole 142 of the heat sink 130 and discharged upward, so that the heat in the space 140 can be discharged outside the lamp unit 110. Further, since the heat radiation fin 135 is provided in the opening 142 a of the through portion 142, the heat radiation from the heat radiation fin 135 can be enhanced by the air that has passed through the through portion 142.

  The heat sink 130 includes a lower end 102a of the projection lens 102, a rear focal point F of the projection lens 28, and an intersection of a line L1 extending from the lower end 102a of the projection lens 102 to the rear of the lamp and a line L2 extending from the rear focal point F in the vertical direction. At least a part of the penetrating portion 142 and the radiating fin 135 is arranged in a right triangle region R connecting the three points C. Thereby, it is possible to prevent the heat sink 130 from blocking the optical path from the semiconductor light emitting element 162 to the projection lens 102.

(Third embodiment)
FIG. 5 is a cross-sectional view of a vehicle headlamp 300 using a lamp unit 210 according to the third embodiment.

  As shown in FIG. 5, the vehicle headlamp 300 includes a lamp body 212, a translucent cover 214, and a lamp unit 210 housed in a lamp chamber 216 formed by the lamp body 212 and the translucent cover 214. And a bracket 215 as a support member for supporting the lamp unit 210 in the lamp chamber 216. The lamp unit 210 is a direct-projection projector-type lamp unit, and includes a light emitting module 222 including a plurality of semiconductor light emitting elements and a projection lens 221. Further, an extension 218 is provided between the outer peripheral portion around the optical axis of the lamp unit 210 and the translucent cover 214.

  The light emitting module 222 includes an LED chip 222a as a semiconductor light emitting element, a thermally conductive insulating substrate 222b made of ceramic or the like, and a shade 225. The light emitting module 222 is mounted on the central recess 215a of the bracket 215 with its irradiation axis directed toward the front of the vehicle, which is substantially parallel to the irradiation direction of the lamp unit 210 (left direction in FIG. 5).

  The bracket 215 has extensions 224a and 224b extending forward in the optical axis direction from the upper and lower portions of the central recess 215b on which the light emitting module 222 is mounted. The projection lens 221 is a plano-convex aspherical lens that projects light emitted from the light emitting module 222 in front of the lamp, has a convex front surface and a flat rear surface, and is on an optical axis Ax extending in the vehicle front-rear direction. It arrange | positions and is fixed to the vehicle front side front-end | tip part of the extension parts 224a and 224b of the bracket 215. FIG.

  In the vicinity of the rear focal point F of the projection lens 221, the LED chip 222a of the light emitting module 222 is disposed. Light emitted from the light emitting module 222 is directly incident on the projection lens 221. The light incident on the projection lens 221 is condensed by the projection lens 221 and irradiated forward as substantially parallel light.

  Screw holes are formed in predetermined edges (three corners) of the bracket 215. One end of the aiming screw 205 or the leveling shaft 208 is fastened to the screw hole. The other ends of the aiming screw 205 and the leveling shaft 208 are fastened to a screw hole (not shown) of the lamp body 212. Thereby, the bracket 215 is attached to the lamp body 212 in a state of being spaced forward from the rear surface of the lamp body 212. The vehicle headlamp 300 is configured such that the optical axis of the lamp unit 210 can be adjusted in the horizontal direction or the vertical direction by the aiming screw 205, the leveling shaft 208, and the leveling actuator 209.

  In addition, heat radiation fins 226 are provided on the rear side surface of the bracket 215. In addition, a fan 227 that blows air toward the heat radiation fin 226 and cools the heat radiation fin 226 is provided between the heat radiation fin 226 and the lamp body 212. In addition, the heat radiating fins 230 are also provided on the front side of the bracket 215 and in the region inside the extensions 224a and 224b.

  As described above, the lamp unit 210 according to the present embodiment includes the LED chip 222a, the projection lens 221 that projects at least a part of the light emitted from the LED chip 222a as a light source image to the front of the lamp, and the LED chip 222a. A bracket 215 that is disposed around a space 232 that includes an optical path between the lens 221 and that radiates heat generated by the LED chip 222a to the outside of the lamp unit 210; The extension portions 224 a and 224 b of the bracket 215 are formed with through portions 234 a and 234 b so as to communicate between the lamp chamber 216 outside the lamp unit 210 and the space 232. Moreover, the radiation fin 230 is provided so that the opening 236a, 236b of penetration part 234a, 234b may be crossed.

  Thereby, the lamp unit 210 can discharge the air inside the lamp unit 210 heated by the heat generated by the LED chip 222a to the outside of the lamp unit via the through portions 234a and 234b formed above and below the bracket 215. Therefore, the heat dissipation of the lamp unit can be improved. Alternatively, by taking in air from outside the lamp unit 210 from below via the penetration part 234a formed in the lower part of the bracket 215 and discharging it outside via the penetration part 234a formed in the upper part, The heat in the space 232 can be discharged to the outside of the lamp unit 110. Moreover, since the radiation fins 230 are provided in the openings 236a and 236b of the through portions 234a and 234b, the heat radiation from the radiation fins 230 can be enhanced by the air that has passed through the through portions 234a and 234b.

  The bracket 215 includes a lower end 221a of the projection lens 221, a rear focal point F of the projection lens 221, and an intersection of a line L1 extending from the lower end 221a of the projection lens 221 to the rear of the lamp and a line L2 extending from the rear focal point F in the vertical direction. At least a part of the penetrating portion 234a and the heat radiating fins 230 are arranged in a right triangle region R connecting the three points C. The bracket 215 includes an upper end 221b of the projection lens 221, a rear focal point F of the projection lens 221, a line L1 ′ extending from the upper end 221b of the projection lens 221 to the rear of the lamp, and a line L2 extending vertically from the rear focal point F. At least a part of the penetrating portion 234b and the heat radiating fins 230 are arranged in a right-angled triangular region R ′ connecting the three points “intersection C” with “.

  Thereby, it is possible to prevent the bracket 215 from blocking the optical path from the LED chip 222a to the projection lens 221.

  As described above, the present invention has been described with reference to the above-described embodiments. However, the present invention is not limited to the above-described embodiments, and the configuration of each embodiment is appropriately combined or replaced. Are also included in the present invention. Further, it is possible to appropriately change the combination and processing order in each embodiment based on the knowledge of those skilled in the art and to add various modifications such as various design changes to each embodiment. Embodiments to which is added can also be included in the scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 Lamp unit, 12 Lamp body, 16 Lamp chamber, 18 Metal support member, 24 1st LED, 26 2nd LED, 28 Projection lens, 30 Space, 32 Upper bracket, 34 Lower bracket, 34a Upper surface, 34b Recessed part, 54 1st penetration part, 54a opening part, 56 1st radiation fin, 58 2nd penetration part, 58a opening part, 60 3rd penetration part, 60a opening part, 62 2nd radiation fin, 100 Vehicle headlamp.

Claims (5)

A lamp unit used for a vehicle lamp,
A light emitting element;
A projection lens that projects at least part of the light emitted by the light emitting element as a light source image to the front of the lamp;
A heat dissipating member to which the light emitting element is fixed, the heat dissipating member being disposed around a space including an optical path between the light emitting element and the projection lens and dissipating heat generated by the light emitting element to the outside of the lamp unit. And comprising
The heat dissipation member is
A penetrating portion formed to communicate between the outside of the lamp unit and the space;
A heat dissipating fin provided across the opening of the penetrating part;
A lamp unit characterized by comprising:   The lamp unit according to claim 1, wherein the penetrating portion is formed in a vertical direction. The heat dissipation member is
Three points of the upper end or lower end of the projection lens, the rear focal point of the projection lens, and the intersection of a line extending from the upper end or lower end of the projection lens to the rear of the lamp and a line extending from the rear focal point in the vertical direction. In the region of the connected right triangle, at least a part of the penetrating part and the radiating fin is arranged,
The lamp unit according to claim 1, wherein the lamp unit is a lamp unit.   The lamp unit according to any one of claims 1 to 3, wherein the heat dissipating member has a rear penetrating portion communicating with a space above and below the heat dissipating member on a lamp rear side of the light emitting element. A lamp unit used for a vehicle lamp,
A first light emitting element;
A second light emitting element disposed at a different position from the first light emitting element;
A projection lens that projects at least a part of light emitted from at least one of the first light emitting element and the second light emitting element to the front of the lamp as a light source image;
The first light-emitting element is disposed around a space including an optical path between the first light-emitting element and the second light-emitting element and the projection lens, and dissipates heat generated by the first light-emitting element to the outside of the lamp unit. Heat dissipation member,
A second heat dissipating member disposed around the space and dissipating heat generated by the second light emitting element to the outside of the lamp unit;
The first heat radiating member is
A first penetrating portion formed to communicate between the outside of the lamp unit and the space;
A first heat dissipating fin provided across the opening of the first penetrating portion;
A second penetrating portion formed on the lamp rear side of the first light emitting element so as to communicate the upper and lower spaces of the first heat radiating member;
The second heat radiating member is
The second light emitting element has a third penetrating portion formed to communicate with the upper and lower spaces of the second heat radiating member on the rear side of the lamp, and the opening of the third penetrating portion and the It is comprised so that the opening part of the 2nd penetration part may counter,
A lamp unit characterized by that.

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