JP2024076852A - Vehicle lighting fixtures - Google Patents
Vehicle lighting fixtures Download PDFInfo
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- JP2024076852A JP2024076852A JP2022188649A JP2022188649A JP2024076852A JP 2024076852 A JP2024076852 A JP 2024076852A JP 2022188649 A JP2022188649 A JP 2022188649A JP 2022188649 A JP2022188649 A JP 2022188649A JP 2024076852 A JP2024076852 A JP 2024076852A
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- light
- peripheral wall
- projection lens
- reflecting
- vehicle lamp
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 51
- 230000017525 heat dissipation Effects 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims description 27
- 230000003287 optical effect Effects 0.000 claims description 17
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000004512 die casting Methods 0.000 claims description 6
- 239000002131 composite material Substances 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005137 deposition process Methods 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/29—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/36—Combinations of two or more separate reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/39—Attachment thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
【課題】リフレクタ形状の複雑化を避けた簡素な構造によってロス光の有効利用を実現可能にした車両用灯具に関する。【解決手段】光源である発光素子９，１０と、発光素子の基板８を搭載する放熱部材５と、レンズホルダ６に固定された投影レンズ７と、光源の光を投影レンズ７に反射するリフレクタ１１，１２を有する車両用灯具１において、放熱部材５が、レンズ方向に突出し、発光素子９，１０の基板８を取り囲むように配置される周壁部５ｂを有し、周壁部５ｂが、投影レンズ７へ向けられた第１反射部５ｄ，５ｆ，５ｈ，５ｊを有し、レンズホルダ６が、投影レンズ７へ向けられた第２反射部６ａを内周面に有するようにした。【選択図】図１[Problem] A vehicle lamp that makes it possible to effectively utilize lost light by using a simple structure that avoids complicating the reflector shape. [Solution] In a vehicle lamp 1 having a light-emitting element 9, 10 that is a light source, a heat dissipation member 5 that mounts a substrate 8 of the light-emitting element, a projection lens 7 fixed to a lens holder 6, and reflectors 11, 12 that reflect the light of the light source to the projection lens 7, the heat dissipation member 5 has a peripheral wall portion 5b that protrudes in the lens direction and is arranged to surround the substrate 8 of the light-emitting element 9, 10, the peripheral wall portion 5b has first reflecting portions 5d, 5f, 5h, 5j that are directed toward the projection lens 7, and the lens holder 6 has a second reflecting portion 6a that is directed toward the projection lens 7 on its inner surface. [Selected Figure] Figure 1
Description
簡素な構造のリフレクタでロス光の有効利用を実現した車両用灯具に関する技術。 A technology for vehicle lighting that uses a reflector with a simple structure to effectively utilize lost light.
特許文献１の車両用灯具は、ＬＥＤ（発光素子）から出射した光を金属製または樹脂ダイキャスト製のリフレクタによって反射させ、レンズホルダに固定された投影レンズから車両の前方に出射させるものである。 The vehicle lamp in Patent Document 1 reflects light emitted from an LED (light-emitting element) using a metal or resin die-cast reflector, and emits the light forward of the vehicle from a projection lens fixed to a lens holder.
このような従来の車両用灯具においては、ＬＥＤ光源から出射し、リフレクタの反射面に入射出来ないことで投影レンズに反射されず、前方への配光に寄与できないロス光の有効利用が求められている。 In such conventional vehicle lighting fixtures, there is a need to effectively utilize the lost light that is emitted from the LED light source and cannot enter the reflective surface of the reflector, is not reflected by the projection lens, and does not contribute to the light distribution forward.
特許文献１のような車両用灯具におけるロス光は、樹脂製リフレクタの先端部分をレンズ方向に延伸形成し、前記先端部分の反射角が、基端部分の反射角と異なるリフレクタを形成することで低減させることが考えられる。 It is thought that the light loss in vehicle lamps such as those in Patent Document 1 can be reduced by forming a reflector in which the tip portion of the resin reflector is extended in the direction of the lens and the reflection angle of the tip portion is different from the reflection angle of the base end portion.
しかし、このような樹脂製リフレクタは、ロス光の低減を図ることが出来たとしても、形状の複雑化によって金型を抜きにくくなることで製造コストの増大を招くことや、大型化によって車両用灯具の重量を増加させる点で問題となる。 However, even if such plastic reflectors can reduce light loss, their complex shapes make it difficult to remove from the mold, which increases manufacturing costs, and their large size increases the weight of the vehicle lamp.
本願は、上記課題に鑑みて、リフレクタ形状の複雑化を避けた簡素な構造によってロス光の有効利用を実現可能にした車両用灯具を提供するものである。 In view of the above problems, this application provides a vehicle lamp that makes it possible to effectively utilize lost light by using a simple structure that avoids complicating the reflector shape.
光源である発光素子と、発光素子の基板を搭載する放熱部材と、レンズホルダに固定された投影レンズと、光源の光を投影レンズに反射するリフレクタを有する車両用灯具において、前記放熱部材が、レンズ方向に突出し、発光素子の基板を取り囲むように配置される周壁部を有し、前記周壁部が、投影レンズへ向けられた第１反射部を有し、前記レンズホルダが、投影レンズへ向けられた第２反射部を内周面に有するようにした。 In a vehicle lamp having a light-emitting element that is a light source, a heat dissipation member that mounts the substrate of the light-emitting element, a projection lens fixed to a lens holder, and a reflector that reflects the light of the light source to the projection lens, the heat dissipation member has a peripheral wall portion that protrudes toward the lens and is arranged to surround the substrate of the light-emitting element, the peripheral wall portion has a first reflecting portion that is directed toward the projection lens, and the lens holder has a second reflecting portion that is directed toward the projection lens on its inner surface.
（作用）放熱部材の第１反射部及びレンズホルダの第２反射部が、リフレクタに入射しない漏れ光を投影レンズに反射する。 (Function) The first reflecting part of the heat dissipation member and the second reflecting part of the lens holder reflect leakage light that does not enter the reflector to the projection lens.
また、前記第１反射部及び前記第２反射部は、光軸に対する角度が互いに異なるように配置されることが望ましい。 It is also preferable that the first reflecting portion and the second reflecting portion are arranged so that their angles with respect to the optical axis are different from each other.
（作用）第１反射部と第２反射部が、投影レンズに対し、光源から出射した光を光軸に対して異なる角度で反射する。 (Function) The first and second reflecting sections reflect the light emitted from the light source to the projection lens at different angles relative to the optical axis.
また、前記発光素子は複数設けられ、前記第１反射部及び第２反射部は、各発光素子の配光間に向けて形成されることが望ましい。 It is also preferable that a plurality of the light-emitting elements are provided, and the first and second reflecting portions are formed toward the light distribution of each of the light-emitting elements.
一般に複数設けられた発光素子の光は、合成配光パターンを形成するが、発光素子毎の配光間には、光量の足りない部分による筋むらが形成される。 Generally, the light from multiple light-emitting elements forms a composite light distribution pattern, but streaks form between the light distribution of each light-emitting element due to areas where the amount of light is insufficient.
（作用）本願車両用灯具の第１反射部及び第２反射部は、光源から出射してリフレクタに入射しない漏れ光を筋むら部位に反射する。 (Function) The first and second reflecting parts of the vehicle lamp of the present invention reflect leakage light that is emitted from the light source but does not enter the reflector to the streak-like portion.
また、前記放熱部材は、アルミダイキャストによって形成されることが望ましい。 It is also preferable that the heat dissipation member is formed by aluminum die casting.
（作用）放熱部材の周壁部に形成された第１反射部が、光の反射性を有する。 (Function) The first reflecting portion formed on the peripheral wall of the heat dissipation member is light reflective.
前記周壁部の前記第１反射部は、発光素子の上方に設けられることが望ましい。 It is desirable that the first reflecting portion of the peripheral wall be provided above the light-emitting element.
（作用）発光素子の上方に形成された第１反射部が、投影レンズから遠方に光を反射する。 (Function) The first reflecting portion formed above the light-emitting element reflects light away from the projection lens.
また、前記光軸に対する前記周壁部の先端部の角度は、光軸に対する基端部の角度よりも小さく形成されることが望ましい。 It is also desirable that the angle of the tip end of the peripheral wall relative to the optical axis be smaller than the angle of the base end relative to the optical axis.
（作用）周壁部の先端部が、基端部よりも内向きに形成され、第１反射部は、投影レンズから更に遠方に光を反射させる。 (Function) The tip of the peripheral wall is formed inward from the base end, and the first reflecting portion reflects light further away from the projection lens.
車両用灯具によれば、放熱部材とレンズホルダの第１反射部及び第２反射部が、リフレクタへの漏れ光を投影レンズに反射するため、リフレクタの形状を複雑化することなくロス光の有効利用を実現出来る。 With this vehicle lamp, the heat dissipation member and the first and second reflecting parts of the lens holder reflect the light leaking into the reflector to the projection lens, making it possible to effectively utilize lost light without complicating the shape of the reflector.
また、車両用灯具によれば、光軸に対する第１反射部及び第２反射部の角度の相違により、金型から抜きにくい形状のリフレクタを形成しなくても、放熱部材の第１反射部とレンズホルダの第２反射部で異なる反射制御を実現出来る。 In addition, with this vehicle lamp, by using different angles between the first and second reflecting parts relative to the optical axis, it is possible to achieve different reflection control between the first reflecting part of the heat dissipation member and the second reflecting part of the lens holder, without having to form a reflector with a shape that is difficult to remove from a mold.
また、車両用灯具によれば、複数発光素子による合成配光パターンを形成する際に従来生じていた筋むらが、第１反射部及び第２反射部の反射光によって解消され、筋むらのない配光が実現出来る。 In addition, with this vehicle lamp, the streaky unevenness that previously occurred when forming a composite light distribution pattern using multiple light-emitting elements is eliminated by the reflected light from the first and second reflectors, making it possible to achieve light distribution without streaky unevenness.
また、車両用灯具によれば、放熱部材の周壁部における第１反射部の形成部位に鏡面処理を施さなくても、光の反射性能を実現出来るため、放熱部材の製造後に第１反射部の形成部位への鏡面処理が不要になる。 In addition, with this vehicle lamp, the light reflection performance can be achieved without mirror finishing on the area where the first reflecting portion is formed on the peripheral wall of the heat dissipation member, so there is no need to mirror finish the area where the first reflecting portion is formed after manufacturing the heat dissipation member.
また、車両用灯具によれば、周壁を発光素子の下方、側方に形成するよりも、発光素子による配光を投影レンズの更に遠方に表示させることが出来る。 In addition, with this vehicle lamp, the light distribution from the light-emitting element can be displayed further away from the projection lens than if the peripheral wall were formed below or to the side of the light-emitting element.
また、車両用灯具によれば、発光素子による配光を投影レンズの更に遠方に表示させることが出来る。 In addition, with vehicle lighting, the light distribution from the light-emitting element can be displayed even further away from the projection lens.
以下、本発明の車両用灯具の好適な実施形態を図１から図５に基づいて説明する。各図においては、車両用灯具の各方向を（前方：後方：左方向：右方向：上方向：下方向＝Ｆｒ：Ｒｅ：Ｌｅ：Ｒｉ：Ｕｐ：Ｌｏ）として説明する。 A preferred embodiment of the vehicle lamp of the present invention will be described below with reference to Figures 1 to 5. In each figure, the directions of the vehicle lamp will be described as (forward: backward: leftward: rightward: upward: downward = Fr: Re: Le: Ri: Up: Lo).
図１に示される第１の実施形態の車両用灯具１は、ランプボディ２と、前面カバー３と、灯具ユニット４と、を備える。ランプボディ２は、車両（図示せず）の前方側に開口部を有する。前面カバー３は、透光性を有する樹脂やガラス等で形成され、ランプボディ２の開口部に取り付けられることによって内側に灯室Ｓを形成する。灯具ユニット４は、金属製の放熱部材５，樹脂製のレンズホルダ６及び透光性を有する両凸形状の投影レンズ７によって構成され、灯室Ｓの内側に配置される。 The vehicle lamp 1 of the first embodiment shown in FIG. 1 comprises a lamp body 2, a front cover 3, and a lamp unit 4. The lamp body 2 has an opening on the front side of the vehicle (not shown). The front cover 3 is made of a translucent resin or glass, and is attached to the opening of the lamp body 2 to form a lamp chamber S inside. The lamp unit 4 is composed of a metal heat dissipation member 5, a resin lens holder 6, and a translucent biconvex projection lens 7, and is disposed inside the lamp chamber S.
図１に示す通り、放熱部材５は、本体部５ａと、本体部５ａの前面に一体化された周壁部５ｂによって構成される。図２（ａ）は、図１のレンズホルダ６を省略した状態の矢視Ａ図である。図２（ａ）に示す通り、周壁部５ｂは、上壁部５ｃ、下壁部５ｅ、左壁部５ｇ、右壁部５ｉからなる矩形筒状に形成される。周壁部５ｂの内側において、本体部５ａの前面５ａ１には、光源であるＬＥＤ等の発光素子９，１０を搭載した基板８が設けられ、周壁部５ｂは、発光素子９，１０の基板８を取り囲むように配置される。基板８上において、発光素子９，１０の周囲には、放物面形状の反射面１１ａ，１２ａを有するリフレクタ１１，１２がそれぞれ設けられる。 1, the heat dissipation member 5 is composed of a main body 5a and a peripheral wall 5b integrated with the front surface of the main body 5a. FIG. 2(a) is a view of the arrow A in FIG. 1 with the lens holder 6 omitted. As shown in FIG. 2(a), the peripheral wall 5b is formed in a rectangular tube shape consisting of an upper wall 5c, a lower wall 5e, a left wall 5g, and a right wall 5i. Inside the peripheral wall 5b, a substrate 8 on which light-emitting elements 9 and 10 such as LEDs as light sources are mounted is provided on the front surface 5a1 of the main body 5a, and the peripheral wall 5b is arranged so as to surround the substrate 8 of the light-emitting elements 9 and 10. On the substrate 8, reflectors 11 and 12 having parabolic reflecting surfaces 11a and 12a are provided around the light-emitting elements 9 and 10, respectively.
図１及び図２（ａ）に示す通り、上壁部５ｃ、下壁部５ｅ、左壁部５ｇ、右壁部５ｉの内周面には、投影レンズ７に向けられた、第１反射部５ｄ、５ｆ、５ｈ、５ｊがそれぞれ設けられる。第１反射部５ｄ、５ｆ、５ｈ、５ｊは、いずれも発光素子９，１０と投影レンズ７の双方に向けて配置され、発光素子９，１０による出射光を投影レンズ７に向けて反射する。 As shown in FIG. 1 and FIG. 2(a), first reflecting portions 5d, 5f, 5h, and 5j facing the projection lens 7 are provided on the inner peripheral surfaces of the upper wall portion 5c, the lower wall portion 5e, the left wall portion 5g, and the right wall portion 5i, respectively. The first reflecting portions 5d, 5f, 5h, and 5j are all arranged facing both the light-emitting elements 9 and 10 and the projection lens 7, and reflect the light emitted by the light-emitting elements 9 and 10 toward the projection lens 7.
尚、図２（ｂ）は、図１の放熱部材５の周壁部５ｂの変形例を矢視Ａの位置で見た図である。図２（ｂ）に示すように、放熱部材５の周壁部は、図２（ａ）に示すような矩形筒状の周壁部５ｂの替わりに、有底円筒型の周壁部５ｂ’としても良い。円筒型の周壁部５ｂ’には、内周面に第１反射部５ｂ’１を設け、第１反射部５ｂ’１は、発光素子９，１０の出射光を投影レンズ７に反射するように形成される。尚、周壁部５ｂは、矩形以外の多角形からなる筒状としても良く、筒型形状から一部の周壁が断続した形状であっても良い。 In addition, FIG. 2(b) is a view of a modified example of the peripheral wall portion 5b of the heat dissipation member 5 of FIG. 1, seen from the position of the arrow A. As shown in FIG. 2(b), the peripheral wall portion of the heat dissipation member 5 may be a cylindrical peripheral wall portion 5b' with a bottom instead of the rectangular cylindrical peripheral wall portion 5b as shown in FIG. 2(a). The cylindrical peripheral wall portion 5b' has a first reflecting portion 5b'1 on its inner peripheral surface, and the first reflecting portion 5b'1 is formed so as to reflect the emitted light of the light emitting elements 9 and 10 to the projection lens 7. In addition, the peripheral wall portion 5b may be a cylindrical shape consisting of a polygon other than a rectangle, or may be a shape in which a part of the peripheral wall is interrupted from the cylindrical shape.
また、図１に示す通り、放熱部材５の周壁部５ｂの前端部５ｂ１には、後端側が斜めに切断された円筒状のレンズホルダ６が一体に取り付けられる。図３（ａ）は、図１の放熱部材５を省略した状態の矢視Ｂ図である。図１と図３（ａ）に示す通り、レンズホルダ６の前端部６ｂには、投影レンズ７が固定され、レンズホルダ６の内周面には、第２反射部６ａが設けられる。第２反射部６ａは、発光素子９，１０と投影レンズ７の双方に向けて配置され、発光素子９，１０による出射光を投影レンズ７に向けて反射する。 As shown in FIG. 1, a cylindrical lens holder 6 with its rear end cut at an angle is attached integrally to the front end 5b1 of the peripheral wall portion 5b of the heat dissipation member 5. FIG. 3(a) is a view of arrow B in FIG. 1 with the heat dissipation member 5 omitted. As shown in FIGS. 1 and 3(a), a projection lens 7 is fixed to the front end 6b of the lens holder 6, and a second reflecting portion 6a is provided on the inner peripheral surface of the lens holder 6. The second reflecting portion 6a is disposed facing both the light emitting elements 9, 10 and the projection lens 7, and reflects the light emitted by the light emitting elements 9, 10 toward the projection lens 7.
尚、図３（ｂ）は、図１のレンズホルダ６の変形例を矢視Ｂの位置で見た図である。図３（ｂ）に示すように、レンズホルダは、図３（ａ）に示すような円筒形状のレンズホルダ６の替わりに矩形筒状のレンズホルダ１４としても良い。レンズホルダ１４には、前端部１４ｆに設けた円孔１４ａに投影レンズ７が固定され、レンズホルダ１４の矩形の内周面には、第２反射部１４ｂ～１４ｅをそれぞれ設け、第２反射部１４ｂ～１４ｅは、発光素子９，１０の出射光を投影レンズ７に反射するように形成される。尚、レンズホルダ６は、矩形以外の多角形からなる筒状としても良く、筒型形状から一部の周壁が断続した形状であっても良い。 In addition, FIG. 3(b) is a view of a modified example of the lens holder 6 in FIG. 1, seen from the position of the arrow B. As shown in FIG. 3(b), the lens holder may be a rectangular tubular lens holder 14 instead of the cylindrical lens holder 6 shown in FIG. 3(a). The lens holder 14 has a circular hole 14a provided at the front end 14f to which the projection lens 7 is fixed, and second reflecting portions 14b to 14e are provided on the rectangular inner peripheral surface of the lens holder 14, and the second reflecting portions 14b to 14e are formed to reflect the emitted light of the light emitting elements 9 and 10 to the projection lens 7. In addition, the lens holder 6 may be a tubular shape consisting of a polygon other than a rectangle, or may be a shape in which a part of the peripheral wall is interrupted from the tubular shape.
図１，図２（ａ）（ｂ）及び図３（ａ）（ｂ）に示す、第１反射部５ｄ、５ｆ、５ｈ、５ｊ、５ｂ’１と、第２反射部６ａ、１４ｂ～１４ｅは、金属製の周壁部５ｂ、５ｂ’の内周面と、樹脂製のレンズホルダ６，１４の内周面に銀またはアルミの蒸着処理を施されることで形成されることが望ましい。 The first reflecting portions 5d, 5f, 5h, 5j, 5b'1 and the second reflecting portions 6a, 14b to 14e shown in Figures 1, 2(a) and 2(b), and 3(a) and 3(b) are preferably formed by subjecting the inner circumferential surfaces of the metal peripheral wall portions 5b and 5b' and the inner circumferential surfaces of the resin lens holders 6 and 14 to a silver or aluminum deposition process.
また、図２（ａ）（ｂ）の第１反射部５ｄ、５ｆ、５ｈ、５ｊ、５ｂ’１は、それぞれ金属製の放熱部材５全体をアルミダイキャストで製造し、またはアルミダイキャストで製造した周壁部５ｂ（または周壁部５ｂ’）を別の金属で形成した本体部に一体固定することで形成されることがより望ましい。放熱部材５の周壁部５ｂ、５ｂ’は、アルミダイキャストで製造されることにより、銀またはアルミの蒸着処理を施した場合と同等の反射性能を内周面に有することとなるため、蒸着処理の工程を省略し、放熱部材を安価に製造することが出来る。また、図３（ａ）、（ｂ）に示す筒型のレンズホルダ６，１４においても、樹脂ではなくアルミダイキャスト製とした上で、放熱部材５に固定することにより、内周面に蒸着処理を施すこと無く、第２反射部６ａ、１４ｂ～１４ｅを形成することが望ましい。 Moreover, it is more preferable that the first reflecting parts 5d, 5f, 5h, 5j, and 5b'1 in Fig. 2(a) and (b) are formed by manufacturing the entire heat dissipation member 5 made of metal by aluminum die casting, or by integrally fixing the peripheral wall part 5b (or peripheral wall part 5b') manufactured by aluminum die casting to a main body part formed of another metal. Since the peripheral wall parts 5b and 5b' of the heat dissipation member 5 are manufactured by aluminum die casting, the inner peripheral surface has the same reflecting performance as when silver or aluminum is vapor-deposited, and the vapor-deposition process can be omitted, and the heat dissipation member can be manufactured inexpensively. Also, it is preferable that the cylindrical lens holders 6 and 14 shown in Fig. 3(a) and (b) are made of aluminum die casting instead of resin and then fixed to the heat dissipation member 5, so that the second reflecting parts 6a, 14b to 14e are formed without performing vapor deposition on the inner peripheral surface.
また、図１，図２（ａ）（ｂ）及び図３（ａ）（ｂ）に示すように、発光素子９，１０の上下に位置する第１反射部５ｄ、５ｆ（５ｂ’１も同様）は、投影レンズ７の前後に伸びる光軸Ｌに対して角度θ１だけ傾いた反射面として形成され、第２反射部６ａ（１４ｂ、１４ｃ）は、光軸Ｌと平行な反射面として形成される。第１反射部５ｄ、５ｆ（５ｂ’１も同様）及び第２反射部６ａは、光軸Ｌに対する角度を同一の０°（光軸Ｌと平行）にするよりも、θ１と０°とそれぞれ異なるものとすることにより、発光素子９，１０からの出射光をそれぞれ異なる角度で投影レンズ７に反射でき、配光の照射方向をより多彩に制御出来る点で望ましい。 As shown in Figs. 1, 2(a) and 2(b), and 3(a) and 3(b), the first reflecting portions 5d and 5f (as is the case with 5b'1) located above and below the light-emitting elements 9 and 10 are formed as reflecting surfaces inclined at an angle θ1 with respect to the optical axis L extending in front of and behind the projection lens 7, and the second reflecting portions 6a (14b and 14c) are formed as reflecting surfaces parallel to the optical axis L. Rather than making the first reflecting portions 5d and 5f (as is the case with 5b'1) and the second reflecting portion 6a have the same angle of 0° with respect to the optical axis L (parallel to the optical axis L), it is preferable to make the angles θ1 and 0° different from each other, so that the emitted light from the light-emitting elements 9 and 10 can be reflected to the projection lens 7 at different angles, thereby enabling more versatile control of the irradiation direction of the light distribution.
図１に示すように、ランプボディ２には、灯室Ｓの内側に回動自在に取り付けられた３つのエイミングスクリュー（１３、１３及び１つは図示せず）が設けられる。灯具ユニット４は、放熱部材５の本体部５ａの後側に設けられた３つの係止部（５ａ２，５ａ２、及び１つは図示せず）を介してエイミングスクリュー（１３、１３，及び１つは図示せず）に螺着され、各エイミングスクリューの回動に基づいて前後左右に傾動する。 As shown in FIG. 1, the lamp body 2 is provided with three aiming screws (13, 13, and one not shown) that are rotatably attached inside the lamp chamber S. The lamp unit 4 is screwed to the aiming screws (13, 13, and one not shown) via three locking portions (5a2, 5a2, and one not shown) provided on the rear side of the main body portion 5a of the heat dissipation member 5, and tilts forward, backward, left and right based on the rotation of each aiming screw.
尚、図１に示す灯具ユニット４によれば、樹脂製リフレクタ１１，１２の反射面１１ａ，１２ａを光軸Ｌに対して多彩な角度を有するように、金型から抜きにくい複雑な形状に形成しなくても、放熱部材５の前端に設けた単純な筒状の周壁部５ｂ及びレンズホルダ６の内周面にそれぞれ第１反射部５ｄ、５ｆ、５ｈ、５ｊと第２反射部６ａを設け、光軸Ｌに対する第１反射部と第２反射部の角度を異なるようにした状態で周壁部５ｂとレンズホルダ６を接合一体化することにより、多彩な角度を有する複合リフレクタを構成し、多彩な反射制御を行うことが出来、ロス光の有効利用を簡易に安価に実現出来る。 In addition, according to the lamp unit 4 shown in FIG. 1, the reflective surfaces 11a, 12a of the resin reflectors 11, 12 do not have to be formed into a complex shape that is difficult to remove from a mold so as to have various angles with respect to the optical axis L. Instead, the first reflective portions 5d, 5f, 5h, 5j and the second reflective portion 6a are provided on the inner peripheral surface of the simple cylindrical peripheral wall portion 5b provided at the front end of the heat dissipation member 5 and the lens holder 6, respectively, and the peripheral wall portion 5b and the lens holder 6 are joined together while the angles of the first reflective portion and the second reflective portion with respect to the optical axis L are different. This makes it possible to form a composite reflector with various angles, perform various reflection control, and easily and inexpensively realize effective use of lost light.
図１に示す通り、具体的には、発光素子９，１０をそれぞれ出射し、リフレクタ１１，１２の反射面１１ａ，１２ａに入射出来なかった、本来ならグレアとなる光Ｂ１１，Ｂ１２，Ｂ２１，Ｂ２２は、第１反射部５ｄ、５ｆ、５ｈ、５ｊと第２反射部６ａにより、互いに異なる角度で投影レンズ７に反射され、リフレクタ１１，１２による反射光Ｂ３１，Ｂ３２，Ｂ４１，Ｂ４２による配光を補光する。尚、発光素子９，１０の上方に設けられた周壁部５ｂの上壁部５ｃの第１反射部５ｄは、他の第１反射部５ｆ、５ｈ、５ｊよりも車両用灯具１の遠方に光を反射出来る点で優れている。 As shown in FIG. 1, specifically, the light B11, B12, B21, and B22 that are emitted from the light emitting elements 9 and 10, respectively, and cannot enter the reflecting surfaces 11a and 12a of the reflectors 11 and 12, which would otherwise be glare, are reflected by the first reflecting parts 5d, 5f, 5h, and 5j and the second reflecting part 6a to the projection lens 7 at different angles, supplementing the light distribution by the reflected light B31, B32, B41, and B42 by the reflectors 11 and 12. The first reflecting part 5d of the upper wall part 5c of the peripheral wall part 5b provided above the light emitting elements 9 and 10 is superior to the other first reflecting parts 5f, 5h, and 5j in that it can reflect light farther away from the vehicle lamp 1.
図４は、図１のリフレクタ１１、１２による配光と、第１反射部５ｄ、５ｆ、５ｈ、５ｊと第２反射部６ａによる望ましい配光態様を示すものである。発光素子９から出射し、リフレクタ１１に反射された光Ｂ１１，Ｂ１２は、投影レンズ７の後方で焦点Ｐを結びつつ投影レンズ７の前方の路面等に楕円形状の配光パターンＷ１を表示する。発光素子１０から出射し、リフレクタ１２に反射された光Ｂ２１，Ｂ２２は、投影レンズ７の後方で焦点Ｐを結びつつ投影レンズ７の前方の路面等に出射し、光軸Ｌを挟んで配光パターンＷ１と上下の位置が逆転した楕円形状の配光パターンＷ２を表示する。配光パターンＷ１と配光パターンＷ２が、上下にオフセットされた合成配光パターンにおいては、両配光パターンの境界領域Ａ１が薄暗くなるため、そのままでは合成配光パターンが横縞状に見えてしまう問題を生じる。 Figure 4 shows the light distribution by the reflectors 11 and 12 in Figure 1 and the desirable light distribution mode by the first reflecting parts 5d, 5f, 5h, 5j and the second reflecting part 6a. The light B11 and B12 emitted from the light-emitting element 9 and reflected by the reflector 11 form a focal point P behind the projection lens 7 and display an elliptical light distribution pattern W1 on the road surface in front of the projection lens 7. The light B21 and B22 emitted from the light-emitting element 10 and reflected by the reflector 12 form a focal point P behind the projection lens 7 and are emitted to the road surface in front of the projection lens 7, and display an elliptical light distribution pattern W2 whose vertical position is reversed from that of the light distribution pattern W1 across the optical axis L. In a composite light distribution pattern in which the light distribution pattern W1 and the light distribution pattern W2 are offset vertically, the boundary area A1 between the two light distribution patterns becomes dim, causing a problem that the composite light distribution pattern appears as horizontal stripes if left as is.
図１に示す本実施形態の車両用灯具１においては、発光素子９，１０を出射して、第１反射部５ｄ、５ｆ、５ｈ、５ｊから投影レンズ７に反射された反射光Ｂ３１，Ｂ４１と、第２反射部６ａから投影レンズ７に反射された反射光Ｂ３２，Ｂ４２をそれぞれ、図４に示す薄暗い境界領域Ａ１に照射して配光パターンＷ３を表示することにより、合成配光パターンを均一化することが望ましい。 In the vehicle lamp 1 of this embodiment shown in FIG. 1, it is desirable to homogenize the composite light distribution pattern by irradiating the light emitting elements 9 and 10 with the reflected light B31 and B41 reflected from the first reflecting portion 5d, 5f, 5h, and 5j to the projection lens 7, and the reflected light B32 and B42 reflected from the second reflecting portion 6a to the projection lens 7, respectively, onto the dim boundary area A1 shown in FIG. 4 to display the light distribution pattern W3.
図５により、図１に示す放熱部材５の周壁部５ｂの変形例を説明する。図５の放熱部材５’は、周壁部５ｂ’の形状が周壁部５ｂと異なる他、図１の放熱部材５と共通の構成を有する。図５の軸線Ｌ１は、図１の光軸Ｌと平行な線を示す。周壁部５ｂ’は、軸線Ｌ１に対して異なる角度に形成された複数の反射部５ｄ１、５ｄ２によって構成される。本体部５ａに連続する基端側の反射部５ｄ１は、軸線Ｌ１に対して角度θ２傾いた反射面として形成され、先端側の反射部５ｄ２は、軸線Ｌ１に対して５ｄ１よりも小さな角度θ３傾いた反射面として形成される。反射部５ｄ２は、反射部５ｄ１よりも内向きに形成されることにより、反射部５ｄ１よりも遠方に発光素子９の光を反射できる点で望ましい。 A modified example of the peripheral wall 5b of the heat dissipation member 5 shown in FIG. 1 will be described with reference to FIG. 5. The heat dissipation member 5' in FIG. 5 has a common configuration with the heat dissipation member 5 in FIG. 1, except that the shape of the peripheral wall 5b' is different from that of the peripheral wall 5b. The axis L1 in FIG. 5 indicates a line parallel to the optical axis L in FIG. 1. The peripheral wall 5b' is composed of a plurality of reflecting portions 5d1 and 5d2 formed at different angles with respect to the axis L1. The reflecting portion 5d1 on the base end side, which is continuous with the main body portion 5a, is formed as a reflecting surface inclined at an angle θ2 with respect to the axis L1, and the reflecting portion 5d2 on the tip end side is formed as a reflecting surface inclined at an angle θ3 smaller than 5d1 with respect to the axis L1. The reflecting portion 5d2 is preferable in that it can reflect the light of the light-emitting element 9 farther away than the reflecting portion 5d1 by being formed inwardly than the reflecting portion 5d1.
尚、図１の放熱部材５は、周壁部５ｂを本体部５ａに一体形成した有底円筒形状を有するように構成してもよく、別体で形成した５ｂを本体部５ａに接合形成しても良い。周壁部５ｂは、本体部５ａに接合形成されることにより、一体形成されるよりも多彩な角度の第１反射部を形成出来る点で望ましい。 The heat dissipation member 5 in FIG. 1 may be configured to have a bottomed cylindrical shape with the peripheral wall portion 5b integrally formed with the main body portion 5a, or 5b formed separately may be joined to the main body portion 5a. By joining the peripheral wall portion 5b to the main body portion 5a, it is possible to form the first reflecting portion at a variety of angles, which is preferable compared to when the peripheral wall portion 5b is integrally formed.
また、発光素子９、１０は、本実施形態のように複数では無く単数とし、単数の発光素子によって投影レンズ７の前方に照射された配光パターンに上述する第１反射部及び第２反射部による配光を重ね、補光するように合成配光パターンを表示しても良い。 In addition, the light emitting elements 9 and 10 may be singular rather than multiple as in this embodiment, and a composite light distribution pattern may be displayed by superimposing the light distribution pattern emitted in front of the projection lens 7 by the single light emitting element and the light distribution by the first reflecting section and the second reflecting section described above, to supplement the light.
１ 車両用灯具
５ 放熱部材
５ｂ 周壁部
５ｄ，５ｆ，５ｈ，５ｊ 第１反射部
６ レンズホルダ
６ａ 第２反射部
７ 投影レンズ
８ 基板
９，１０ 発光素子
Ｌ 光軸
Reference Signs List 1 Vehicle lamp 5 Heat dissipation member 5b Peripheral wall portion 5d, 5f, 5h, 5j First reflecting portion 6 Lens holder 6a Second reflecting portion 7 Projection lens 8 Substrate 9, 10 Light emitting element L Optical axis
Claims (6)
前記放熱部材が、レンズ方向に突出し、発光素子の基板を取り囲むように配置される周壁部を有し、
前記周壁部が、投影レンズへ向けられた第１反射部を有し、
前記レンズホルダが、投影レンズへ向けられた第２反射部を内周面に有することを特徴とする車両用灯具。 A vehicle lamp having a light-emitting element as a light source, a heat dissipation member on which a substrate of the light-emitting element is mounted, a projection lens fixed to a lens holder, and a reflector that reflects light from the light source to the projection lens,
the heat dissipation member has a peripheral wall portion that protrudes toward the lens and is disposed so as to surround the substrate of the light emitting element,
the peripheral wall portion has a first reflecting portion directed toward a projection lens,
The vehicle lamp according to claim 1, wherein the lens holder has a second reflecting portion on an inner peripheral surface thereof, the second reflecting portion being directed toward a projection lens.
前記第１反射部及び第２反射部は、各発光素子の配光間に向けて形成されたことを特徴とする、請求項１または２に記載の車両用灯具。 A plurality of the light-emitting elements are provided,
3. The vehicle lamp according to claim 1, wherein the first reflecting portion and the second reflecting portion are formed toward a space between light distribution points of the light emitting elements.
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| JP2022188649A JP2024076852A (en) | 2022-11-25 | 2022-11-25 | Vehicle lighting fixtures |
| PCT/JP2023/041440 WO2024111517A1 (en) | 2022-11-25 | 2023-11-17 | Vehicle lamp |
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| JP2022188649A JP2024076852A (en) | 2022-11-25 | 2022-11-25 | Vehicle lighting fixtures |
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| JP2024076852A true JP2024076852A (en) | 2024-06-06 |
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| US7832912B2 (en) * | 2008-04-24 | 2010-11-16 | Ichikoh Industries, Ltd. | Lamp unit for vehicles |
| JP2019194947A (en) * | 2018-05-01 | 2019-11-07 | 株式会社小糸製作所 | Lamp unit |
| CN212029390U (en) * | 2020-04-01 | 2020-11-27 | 江苏富新电子照明科技有限公司 | Automobile LED lamp |
| JP2022144102A (en) * | 2021-03-18 | 2022-10-03 | 株式会社小糸製作所 | Vehicular lighting fixture |
-
2022
- 2022-11-25 JP JP2022188649A patent/JP2024076852A/en active Pending
-
2023
- 2023-11-17 WO PCT/JP2023/041440 patent/WO2024111517A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024111517A1 (en) | 2024-05-30 |
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