JP7765994B2 - Resin reflectors for vehicle lighting fixtures - Google Patents
Resin reflectors for vehicle lighting fixturesInfo
- Publication number
- JP7765994B2 JP7765994B2 JP2022045673A JP2022045673A JP7765994B2 JP 7765994 B2 JP7765994 B2 JP 7765994B2 JP 2022045673 A JP2022045673 A JP 2022045673A JP 2022045673 A JP2022045673 A JP 2022045673A JP 7765994 B2 JP7765994 B2 JP 7765994B2
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- Japan
- Prior art keywords
- reflective
- wall portion
- reflector
- lower wall
- resin reflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
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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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V15/00—Protecting lighting devices from damage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/09—Optical design with a combination of different curvatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
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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
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
- F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
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- 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)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
羅列された複数の前方反射領域を有する反射部を有するリフレクタに関する技術。 Technology related to a reflector having a reflective portion with multiple arranged forward reflective areas.
特許文献１の図１及び図２には、前面視が矩形形状の反射面を有する樹脂反射鏡と、樹脂反射鏡の中央にフィラメント式のヘッドランプバルブ（電球）を１つ配置したヘッドランプが開示されている。 Figures 1 and 2 of Patent Document 1 disclose a headlamp that includes a resin reflector with a reflective surface that is rectangular when viewed from the front, and a single filament-type headlamp bulb (light bulb) located in the center of the resin reflector.
特許文献１の樹脂反射鏡は、図２に示すように放物面形状の反射面を有する反射部の上端部から前方に突出する上壁部と、反射部の下端部から前方に突出する下壁部と、邦舞部面形状の反射面の裏側外周面に形成された補強リブ３Ｃとを有する。 As shown in Figure 2, the resin reflector of Patent Document 1 has an upper wall portion that protrudes forward from the upper end of a reflecting portion having a parabolic reflecting surface, a lower wall portion that protrudes forward from the lower end of the reflecting portion, and a reinforcing rib 3C formed on the outer periphery of the back side of the parabolic reflecting surface.
近年の自動車用ヘッドランプは、光源にＬＥＤを採用するものが多く、ＬＥＤヘッドランプの中には、拡散性や照度の低いＬＥＤの光を拡散かつ十分に照射するために、複数のＬＥＤ光源から出射した光をＬＥＤ光源毎に左右に羅列配置された反射面を有するリフレクタによって反射し、前照灯用配光パターンを表示するものがある。このようなリフレクタは、全体的に横長になり、反射部の上壁部及び下壁部も横長に形成される。 Many modern automotive headlamps use LEDs as their light source. To diffuse and sufficiently illuminate the low-diffusivity and low-illuminance LED light, some LED headlamps reflect the light emitted from multiple LED light sources using a reflector with reflective surfaces arranged on the left and right sides of each LED light source, creating a headlight light distribution pattern. These reflectors are generally horizontally elongated, with the upper and lower walls of the reflecting portion also elongated horizontally.
横長に形成された樹脂製リフレクタの上壁部及び下壁部は、成形後に金型から取り外されて冷却硬化する際に、肉厚の違いによって反射部よりも早く冷却硬化する場合がある。上壁部及び下壁部よりも遅れて硬化する反射部には、熱収縮が生じ、上壁部及び下壁部には、反射部に生じた熱収縮によってそれぞれの前端部が内側に倒れるような変形が発生する場合がある。このようにリフレクタの上壁部及び下壁部が内側に倒れる変形は、反射面の一部に変形を生じさせ、特に表示される前照灯配光パターンのカットオフラインの形状に悪影響を及ぼす点で問題となる。 When the upper and lower wall portions of a horizontally shaped resin reflector are removed from the mold after molding and cooled to harden, they may cool and harden faster than the reflective portion due to differences in wall thickness. The reflective portion, which hardens later than the upper and lower wall portions, may experience thermal shrinkage, and the thermal shrinkage in the reflective portion may cause deformation in the upper and lower wall portions, causing their front ends to collapse inward. This deformation of the upper and lower wall portions of the reflector, causing deformation of part of the reflective surface, is problematic as it adversely affects the shape of the cut-off line of the displayed headlamp light distribution pattern.
本願は、上記問題に鑑みて、冷却固化の際にリフレクタの上壁部及び下壁部において内側に倒れる変形を生じにくく、前照灯配光パターンのカットオフライン形状に悪影響の生じにくい車両用灯具用樹脂製リフレクタを提供するものである。 In consideration of the above problems, this application provides a resin reflector for vehicle lighting fixtures that is less likely to collapse inward at the upper and lower wall portions of the reflector when cooled and solidified, and that is less likely to adversely affect the shape of the cut-off line in the headlamp light distribution pattern.
羅列された複数の前方反射領域を有する反射部と、前記反射部の上端部に一体に成形された上壁部と、前記反射部の下端部に一体に成形された下壁部と、を有する車両用灯具用樹脂製リフレクタにおいて、前記下壁部、前記反射部及び前記上壁部の各外周面上に跨がるように一体形成された、連続補強リブを設けた。 A resin reflector for vehicle lighting fixtures has a reflective section with an array of multiple forward reflective areas, an upper wall section integrally molded with the upper end of the reflective section, and a lower wall section integrally molded with the lower end of the reflective section. A continuous reinforcing rib is provided that is integrally formed across the outer peripheral surfaces of the lower wall section, the reflective section, and the upper wall section.
（作用）リフレクタの下壁部及び下壁部の外周壁に設けた補強リブを反射部外周面の補強リブで繋ぐことで連続補強リブとすることにより、金型からの射出時において、リフレクタの反射部に熱収縮が発生しても、上壁部及び下壁部が、内側に曲げられにくくなる。 (Function) By connecting the reinforcing ribs on the lower wall portion and the outer peripheral wall of the reflector with the reinforcing rib on the outer peripheral surface of the reflective portion, the upper and lower wall portions are less likely to bend inward when ejected from the mold, even if thermal shrinkage occurs in the reflective portion of the reflector.
また、車両用灯具用樹脂製リフレクタにおいて、前記上壁部は、前記反射部の上端部から後方に突出する後壁部を備え、前記連続補強リブが、前記下壁部、前記反射部及び前記上端部の後壁部の各外周面上に跨がるように連続一体形成されることが望ましい。 Furthermore, in a resin reflector for a vehicle lamp, it is desirable that the upper wall portion includes a rear wall portion that protrudes rearward from the upper end of the reflecting portion, and that the continuous reinforcing rib be formed integrally and continuously across the outer peripheral surfaces of the lower wall portion, the reflecting portion, and the rear wall portion of the upper end.
（作用）上壁部に後壁部を設け、下壁部、反射部に連続する連続補強リブを後壁部の外周まで一体に連続形成することにより、リフレクタの反射部に熱収縮が発生しても、上壁部及び下壁部が、更に曲げられにくくなる。 (Function) By providing a rear wall section on the upper wall section and forming a continuous reinforcing rib that continues from the lower wall section and reflective section all the way to the outer periphery of the rear wall section, the upper and lower wall sections are even less likely to bend even if thermal shrinkage occurs in the reflective section of the reflector.
また、車両用灯具用樹脂製リフレクタにおいて、前記上壁部及び下壁部のうち少なくとも一方の肉厚が、前記反射部の肉厚よりも薄く形成されることが望ましい。 Furthermore, in a resin reflector for a vehicle lamp, it is desirable that the thickness of at least one of the upper wall portion and the lower wall portion be thinner than the thickness of the reflective portion.
（作用）リフレクタの反射部に生じる熱収縮変形によって上壁部及び下壁部に生じる内側への変形は、上壁部及び下壁部が反射部よりも薄肉に形成される場合に最も発生しやすくなるため、少なくとも一方が反射部よりも薄肉に形成された上壁部及び下壁部に設けた補強リブを反射部外周面の補強リブで繋ぐことで連続補強リブとすることにより、リフレクタの反射部に熱収縮が発生しても、上壁部及び下壁部が、内側に曲げられにくくなる。 (Function) Inward deformation of the upper and lower wall sections due to thermal contraction deformation in the reflective section of the reflector is most likely to occur when the upper and lower wall sections are formed thinner than the reflective section. Therefore, by connecting the reinforcing ribs on the upper and lower wall sections, at least one of which is formed thinner than the reflective section, with a reinforcing rib on the outer periphery of the reflective section to form a continuous reinforcing rib, the upper and lower wall sections are less likely to bend inward even if thermal contraction occurs in the reflective section of the reflector.
また、車両用灯具用樹脂製リフレクタにおいて、前記連続補強リブが、前記反射部の複数の反射領域の裏面毎に形成されることが望ましい。
（作用）連続補強リブが、反射部の複数の反射領域毎に形成されることにより、リフレクタの反射部に熱収縮が発生しても、上壁部及び下壁部が、更に曲げられにくくなる。
In the resin reflector for a vehicle lamp, it is preferable that the continuous reinforcing rib is formed on the back surface of each of the plurality of reflective areas of the reflective portion.
(Operation) By forming the continuous reinforcing rib for each of the plurality of reflecting regions of the reflecting portion, even if thermal shrinkage occurs in the reflecting portion of the reflector, the upper wall portion and the lower wall portion become even less likely to bend.
また、車両用灯具用樹脂製リフレクタにおいて、前記連続補強リブは、前記反射部の複数の反射領域の裏面毎に複数ずつ形成されることが望ましい。 Furthermore, in a resin reflector for a vehicle lamp, it is desirable that multiple continuous reinforcing ribs be formed on the back surface of each of the multiple reflective areas of the reflective portion.
（作用）連続補強リブが、反射部の複数の反射領域毎に複数ずつ形成されることにより、リフレクタの反射部に熱収縮が発生しても、上壁部及び下壁部が、更に曲げられにくくなる。 (Function) By forming multiple continuous reinforcing ribs in each of the multiple reflective areas of the reflective section, the upper and lower wall sections are even less likely to bend even if thermal shrinkage occurs in the reflective section of the reflector.
車両用灯具用樹脂製リフレクタによれば、金型からの射出時における冷却固化において、リフレクタの上壁部及び下壁部に内側に倒れる変形が生じにくくなるため、前照灯配光パターンのカットオフライン形状に悪影響が生じにくくなる。 With a resin reflector for vehicle lighting, the upper and lower walls of the reflector are less likely to collapse inward when cooled and solidified after being ejected from a mold, which reduces the risk of adversely affecting the shape of the cutoff line in the headlamp light distribution pattern.
また、金型からの射出時における冷却固化において、リフレクタの上壁部及び下壁部に生じる内側方向への変形は、薄肉状で先に冷却固化する上壁部及び下壁部が、後から冷却固化する厚肉部の熱収縮変形の影響を受けることによって生じやすくなるため、本願の車両用灯具用樹脂製リフレクタによれば、リフレクタの厚肉状の反射部に熱収縮が発生しても、反射部から上壁部及び下壁部まで連続形成された１本の連続補強リブで繋がれることにより、上壁部及び下壁部が、内側に曲げられにくくなる。 Furthermore, when the reflector is cooled and solidified after being ejected from the mold, the upper and lower wall sections of the reflector are more likely to deform inward because the thinner upper and lower wall sections, which cool and solidify first, are affected by the thermal contraction and deformation of the thicker sections, which cool and solidify later. Therefore, with the resin reflector for vehicle lighting fixtures of the present application, even if thermal contraction occurs in the thick reflective sections of the reflector, the reflective sections are connected to the upper and lower wall sections by a single continuous reinforcing rib, making the upper and lower wall sections less likely to bend inward.
また、車両用灯具用樹脂製リフレクタによれば、反射部の複数の反射領域毎に設けられた連続補強リブにより、リフレクタの反射部に熱収縮が発生しても、上壁部及び下壁部が、更に曲げられにくくなる。 Furthermore, with the resin reflector for vehicle lighting, continuous reinforcing ribs provided in each of the multiple reflective areas of the reflective portion make the upper and lower wall portions even less likely to bend even if thermal shrinkage occurs in the reflective portion of the reflector.
また、車両用灯具用樹脂製リフレクタによれば、連続補強リブが、反射部の複数の反射領域毎に複数ずつ設けられることで、リフレクタの反射部に熱収縮が発生しても、上壁部及び下壁部が、更に曲げられにくくなる。 Furthermore, with the resin reflector for vehicle lighting, multiple continuous reinforcing ribs are provided for each of the multiple reflective areas of the reflective portion, making the upper and lower wall portions even less likely to bend even if thermal shrinkage occurs in the reflective portion of the reflector.
以下、本願発明の車両用灯具用樹脂製リフレクタの第１の実施形態を図１から図４に基づいて説明する。各図においては、車両に対する各方向を（上方：下方：左方：右方：前方：後方＝Ｕｐ：Ｌｏ：Ｌｅ：Ｒｉ：Ｆｒ：Ｒｅ）として説明する。 A first embodiment of the resin reflector for vehicle lighting of the present invention will be described below with reference to Figures 1 to 4. In each figure, the directions relative to the vehicle are described as (upper: lower: left: right: front: rear = Up: Lo: Le: Ri: Fr: Re).
図１、図２は、一例として、本発明の車両用灯具用樹脂製リフレクタ１を示す。車両用灯具用樹脂製リフレクタ１は、車両の左前照灯用のリフレクタであって、左右に羅列かつ一体化された複数の反射領域３～６を有する反射部２と、反射部２の上端部２ａ（図４を参照）に一体に形成された上壁部７と、反射部２の下端部２ｂ（図４を参照）に一体化された下壁部８を有し、左右に延びる横長形状に形成される。 Figures 1 and 2 show an example of a resin reflector 1 for vehicle lighting of the present invention. The resin reflector 1 for vehicle lighting is a reflector for the left headlamp of a vehicle, and has a reflective portion 2 with multiple reflective areas 3-6 aligned and integrated on the left and right, an upper wall portion 7 formed integrally with the upper end portion 2a of the reflective portion 2 (see Figure 4), and a lower wall portion 8 formed integrally with the lower end portion 2b of the reflective portion 2 (see Figure 4), and is formed in a horizontally elongated shape extending left and right.
図１，図２に示すように、反射領域３～６は、仕切壁９～１１にそれぞれ仕切られた、４つの反射領域として形成される。尚、４つの反射領域３～６は、一例であって、左右に羅列された反射領域は、複数であれば、４つに限られない。反射領域は３～６は、光源の光を前方に反射する鏡面状の反射面３ａ～６ａを有する。下壁部８の上面には、反射面３ａ～６ａの各前端部にそれぞれ対応する位置に設けられた、前後に延びる多数の溝状凹凸部からなるローレット８ａ～８ｄが設けられる。また、仕切壁９～１１にもまた、多数の溝状凹凸部からなるローレット９ａ～１１ａが設けられる。 As shown in Figures 1 and 2, reflective areas 3-6 are formed as four reflective areas separated by partition walls 9-11. Note that the four reflective areas 3-6 are just an example, and the number of reflective areas lined up on the left and right is not limited to four, as long as there are multiple reflective areas. Reflective areas 3-6 have mirror-like reflective surfaces 3a-6a that reflect light from the light source forward. The upper surface of the lower wall 8 is provided with knurling 8a-8d, which consists of numerous groove-like irregularities extending forward and backward, located at positions corresponding to the front ends of the reflective surfaces 3a-6a. Furthermore, partition walls 9-11 are also provided with knurling 9a-11a, which consists of numerous groove-like irregularities.
また、図２に示すように、上壁部７には、反射領域３～６毎に光源基板（図４にて、反射領域５の光源基板１２のみ図示。他の光源基板は、同一の構成を有するが、図示せず）を固定するための上下の貫通孔である光源取付孔３ｂ～６ｂが、それぞれ設けられる。図４に示すように、光源基板１２は、ＬＥＤ発光素子等からなる光源１３と基板１４によって構成され、光源１３を下向きにして光源取付孔５ｂに挿通させた状態で、上壁部７の上面７ａ（外周面）に固定される。 As shown in Figure 2, the upper wall 7 is provided with light source mounting holes 3b-6b, which are upper and lower through-holes for fixing light source boards for each of the reflective areas 3-6 (only light source board 12 for reflective area 5 is shown in Figure 4; the other light source boards have the same configuration but are not shown). As shown in Figure 4, the light source board 12 is composed of a light source 13, such as an LED light-emitting element, and a board 14, and is fixed to the upper surface 7a (outer peripheral surface) of the upper wall 7 with the light source 13 facing downward and inserted through the light source mounting hole 5b.
また、図３に示すように、車両用灯具用樹脂製リフレクタ１の上壁部７には、反射部２を形成する反射領域３～６のそれぞれの上端部２ａから後方に延出する後壁部７ｂが設けられる。また、反射部の反射領域３～６の裏面（外周面）には、各反射領域３～６の左右の中央に、連続補強リブ１５～１８が、１つずつ設けられている。連続補強リブ１５～１８は、下壁部８の下面（外周面）、各反射領域３～６の裏面（外周面）及び上壁部の下面（外周面）にそれぞれ跨がるようにそれぞれ一体形成されている。 As shown in FIG. 3, the upper wall 7 of the resin reflector 1 for vehicle lighting has a rear wall 7b extending rearward from the upper end 2a of each of the reflective areas 3-6 that form the reflective section 2. Furthermore, continuous reinforcing ribs 15-18 are provided on the back surface (outer peripheral surface) of each of the reflective areas 3-6 of the reflective section, one at the center on the left and right of each of the reflective areas 3-6. The continuous reinforcing ribs 15-18 are integrally formed so as to straddle the lower surface (outer peripheral surface) of the lower wall 8, the back surface (outer peripheral surface) of each of the reflective areas 3-6, and the lower surface (outer peripheral surface) of the upper wall, respectively.
図３に示すように、車両用灯具用樹脂製リフレクタ１には、後方に延出形成された、上下エイミングスクリュー用ブラケット１９、左右エイミングスクリュー用ブラケット２０及びエイミング支点ブラケット２１が、設けられる。図４に示すように、車両用灯具用樹脂製リフレクタ１は、上下エイミングスクリュー用ブラケット１９及び左右エイミングスクリュー用ブラケット２０にそれぞれ設けられるエイミングナット（図示せず）に螺着された、上下エイミングスクリュー２４及び左右エイミングスクリュー（図示せず）と、エイミング支点ブラケット２１に設けられる球孔状のエイミング支点受部（図示せず）に揺動自在に取り付けられたエイミング支点部材２５により、ランプボディ２２に固定される。車両用灯具用樹脂製リフレクタ１は、ランプボディ２２と前面カバー２３の内側の灯室Ｓ内に設けられて、車両用灯具である左車両用前照灯の一部を構成し、上下エイミングスクリュー２４及び左右エイミングスクリュー（図示せず）により、上下左右に傾動調整される。 As shown in FIG. 3, the vehicle lamp resin reflector 1 is provided with a bracket 19 for upper and lower aiming screws, a bracket 20 for left and right aiming screws, and an aiming fulcrum bracket 21, all of which extend rearward. As shown in FIG. 4, the vehicle lamp resin reflector 1 is fixed to the lamp body 22 by upper and lower aiming screws 24 and left and right aiming screws (not shown), which are threaded onto aiming nuts (not shown) provided on the bracket 19 for upper and lower aiming screws and the bracket 20 for left and right aiming screws, respectively, and by an aiming fulcrum member 25, which is pivotally attached to a spherical aiming fulcrum receiving portion (not shown) provided on the aiming fulcrum bracket 21. The vehicle lamp resin reflector 1 is located within the lamp chamber S inside the lamp body 22 and front cover 23, and forms part of the left vehicle headlamp, which is a vehicle lamp. Its tilt is adjustable up, down, left, and right using the upper and lower aiming screws 24 and left and right aiming screws (not shown).
図４に示すように、車両用灯具用樹脂製リフレクタ１の反射部を形成する反射領域５（反射領域３，４，６も同様）の肉厚ｔ１は、上壁部７及び下壁部８のｊ各肉厚ｔ２よりも厚肉に形成される（ｔ１＞ｔ２とする）ことがより望ましいが、同じ厚さ（ｔ１＝ｔ２）としてもよい。また、上壁部７と下壁部８の肉厚は、異なる寸法としても良い。 As shown in Figure 4, the thickness t1 of the reflective area 5 (and similarly for reflective areas 3, 4, and 6) that forms the reflective portion of the resin reflector 1 for vehicle lighting is preferably thicker than the thickness t2 of each of the upper wall portion 7 and lower wall portion 8 (t1 > t2), but they may also be the same thickness (t1 = t2). The thicknesses of the upper wall portion 7 and lower wall portion 8 may also be different dimensions.
尚、図１から図４に示す車両用灯具用樹脂製リフレクタ１を金型から射出すると、上壁部７及び下壁部８が、先に冷却固化し、これらよりも厚肉の反射部２（反射領域３～６）が、後から冷却固化する。図３及び図４に本実施形態の車両用灯具用樹脂製リフレクタ１には、反射領域３～６の裏面に、それぞれ連続補強リブ１５～１８を設けているが、仮に連続補強リブ１５～１８を設けていない場合、図１に示す、車両用灯具用樹脂製リフレクタ１の上壁部７の左右の中央部７ｄは、反射領域３～６に後から生じる熱収縮変形によって下向きに凸となるように湾曲し、下壁部８の左右の中央部８ｆもまた、上向きに凸となるように湾曲し、上壁部７及び下壁部８の中央が、共に内側に倒れるように変形するという問題を生じる。 When the vehicle lamp resin reflector 1 shown in Figures 1 to 4 is injected from a mold, the upper wall portion 7 and the lower wall portion 8 cool and solidify first, followed by the thicker reflective portion 2 (reflective areas 3-6). In the vehicle lamp resin reflector 1 of this embodiment shown in Figures 3 and 4, continuous reinforcing ribs 15-18 are provided on the back surfaces of the reflective areas 3-6, respectively. However, if the continuous reinforcing ribs 15-18 were not provided, the left and right central portions 7d of the upper wall portion 7 of the vehicle lamp resin reflector 1 shown in Figure 1 would bend downwardly and convexly due to thermal contraction that subsequently occurs in the reflective areas 3-6, and the left and right central portions 8f of the lower wall portion 8 would also bend upwardly and convexly, resulting in the problem of the centers of both the upper wall portion 7 and the lower wall portion 8 deforming inward.
車両用灯具用樹脂製リフレクタ１によれば、反射領域３～６の各裏面に、後方に突出する連続補強リブ１５～１８が設けられており、連続補強リブ１５～１８は、図４の連続補強リブ１７と同一の形態を有する。連続補強リブ１７は、下壁部８の下面８ｅに一体化された第１リブ１７ａ、反射領域５の裏面に一体化された第２リブ１７ｂ及び上壁部７の後壁部７ｂの下面７ｃに一体化された第３リブ１７ｃを１本に連続一体形成したリブであるため、上壁部７及び下壁部８の各中央を内側に変形させにくくする。連続補強リブ１５～１８は、上壁部７を倒れる変形を防止することにより、３ｂ～６ｂ光源取付孔の変形を防止するため、取り付けた光源基板１２の光源１３における取付位置のずれを防止する。 In the resin reflector 1 for vehicle lighting, continuous reinforcing ribs 15-18 protruding rearward are provided on the back surfaces of the reflective areas 3-6. The continuous reinforcing ribs 15-18 have the same configuration as the continuous reinforcing rib 17 shown in Figure 4. The continuous reinforcing rib 17 is a single, continuous, integral rib consisting of a first rib 17a integrated with the underside 8e of the lower wall 8, a second rib 17b integrated with the back surface of the reflective area 5, and a third rib 17c integrated with the underside 7c of the rear wall 7b of the upper wall 7. This makes it difficult for the centers of the upper wall 7 and lower wall 8 to deform inward. The continuous reinforcing ribs 15-18 prevent the upper wall 7 from collapsing, thereby preventing deformation of the light source mounting holes 3b-6b and thus misalignment of the light source 13 on the attached light source board 12.
また、車両用灯具用樹脂製リフレクタ１の上壁部７及び下壁部８の変形は、反射領域３～６のカットオフライン構成面の変形を生じさせることにより、配光パターンを本来求められる形状から逸脱した形状に変形させるため、連続補強リブ１５～１８によって上壁部７及び下壁部８の変形を防止する、本実施形態の車両用灯具用樹脂製リフレクタ１によれば、所定形状から逸脱した配光パターンの変形が生じにくくなる。図４に示すように、光源１３から出射した光Ｌ１は、反射領域５の反射面５ａや、ローレット８ｃによって前面レンズ２３の前方に反射され、反射面５ａによる反射光Ｌ１は、変形のない所定形状の配光パターンを表示する。 Furthermore, deformation of the upper wall portion 7 and lower wall portion 8 of the vehicle lamp resin reflector 1 causes deformation of the cutoff line forming surfaces of the reflective areas 3-6, thereby deforming the light distribution pattern into a shape that deviates from the originally desired shape. Therefore, the continuous reinforcing ribs 15-18 prevent deformation of the upper wall portion 7 and lower wall portion 8. Therefore, with the vehicle lamp resin reflector 1 of this embodiment, deformation of the light distribution pattern that deviates from the predetermined shape is less likely to occur. As shown in Figure 4, light L1 emitted from the light source 13 is reflected forward of the front lens 23 by the reflective surface 5a of the reflective area 5 and the knurling 8c, and the reflected light L1 by the reflective surface 5a displays a light distribution pattern of the predetermined shape without deformation.
尚、本実施形態において、図３に示すように、反射部２の反射領域３～６毎に設けられた連続補強リブ１５～１８は、必ずしも反射領域毎に設けなくても良いが、上壁部７及び下壁部８のより強固な変形防止を実現する観点から、出来るだけ反射領域３～６毎に設けることが望ましい。また、連続補強リブ１５～１８は、本実施形態のように反射領域毎に１箇所ずつ設けることに限られず、各反射領域に複数ずつ連続補強リブを設けることが、より望ましい。 In this embodiment, as shown in FIG. 3, the continuous reinforcing ribs 15-18 provided for each of the reflective areas 3-6 of the reflective section 2 do not necessarily have to be provided for each reflective area, but from the perspective of achieving stronger deformation prevention for the upper wall portion 7 and the lower wall portion 8, it is desirable to provide one for each of the reflective areas 3-6 as much as possible. Furthermore, the continuous reinforcing ribs 15-18 are not limited to being provided in one location for each reflective area as in this embodiment, and it is more desirable to provide multiple continuous reinforcing ribs for each reflective area.
次に、図５（ａ）により、本願の車両用灯具用樹脂製リフレクタの第２の実施形態をそれぞれ説明する。第２の実施形態における車両用灯具用樹脂製リフレクタ３１は、連続補強リブ３５の形態が、第１の実施形態における連続補強リブ１５～１８と異なる他、車両用灯具用樹脂製リフレクタ１と共通の構成を有する。 Next, a second embodiment of the resin reflector for vehicle lighting of the present application will be described with reference to Figure 5(a). The resin reflector for vehicle lighting 31 in the second embodiment has a different configuration for the continuous reinforcing rib 35 than the continuous reinforcing ribs 15-18 in the first embodiment, but shares a common structure with the resin reflector for vehicle lighting 1.
具体的には、図４及び図５（ａ）に示す通り、第１の実施形態における連続補強リブ１７は、第３リブ１７ｃを上壁部７の後壁部７ｂの下面７ｃにのみ設けているが、第２の実施形態における連続補強リブ３５は、第３リブ３５ｃを、後壁部７ｂの下面７ｃ（外周面）のみならず、後面７ｅ（外周面）、上面７ｆ（外周面）にも一体に設けてある点で、連続補強リブ１７と異なる。第３リブ３５ｃは、下壁部８に一体化される第１リブ３５ａ及び反射領域５の裏面に設けられる第２リブ３５ｂと１本になるように連続一体形成される。連続補強リブ３５は、第３補強リブ３５ｃが、後壁部７ｂの後面７ｅ及び上面７ｆにも形成されることにより、反射部２の熱収縮変形時において、第１の実施形態の連続補強リブ１５～１８よりも強く、上壁部７及び下壁部８の内側に倒れる変形を防止する。 Specifically, as shown in Figures 4 and 5(a), the continuous reinforcement rib 17 in the first embodiment has the third rib 17c only on the underside 7c of the rear wall portion 7b of the upper wall portion 7. However, the continuous reinforcement rib 35 in the second embodiment differs from the continuous reinforcement rib 17 in that the third rib 35c is integrally formed not only on the underside 7c (outer peripheral surface) of the rear wall portion 7b, but also on the rear side 7e (outer peripheral surface) and the upper side 7f (outer peripheral surface). The third rib 35c is continuously and integrally formed with the first rib 35a integrated with the lower wall portion 8 and the second rib 35b provided on the back surface of the reflective area 5. Because the third reinforcing rib 35c is also formed on the rear side 7e and upper side 7f of the rear wall portion 7b, the continuous reinforcement rib 35 is stronger than the continuous reinforcement ribs 15-18 in the first embodiment during thermal contraction deformation of the reflective area 2, preventing the upper wall portion 7 and lower wall portion 8 from collapsing inward.
次に、図５（ｂ）により、本願の車両用灯具用樹脂製リフレクタの第３の実施形態をそれぞれ説明する。第３の実施形態における車両用灯具用樹脂製リフレクタ４１は、反射部２’の上壁部７’が、第１の実施形態における上壁部７と異なり、後壁部７ｂを備えていないため、連続補強リブ４５の形態が、連続補強リブ１５～１８と異なる他、第１の実施形態における車両用灯具用樹脂製リフレクタ１と共通の構成を有する。 Next, a third embodiment of the vehicle lamp resin reflector of the present application will be described with reference to Figure 5(b). In the vehicle lamp resin reflector 41 of the third embodiment, the upper wall portion 7' of the reflective portion 2' does not have a rear wall portion 7b, unlike the upper wall portion 7 in the first embodiment. Therefore, the shape of the continuous reinforcing rib 45 differs from the continuous reinforcing ribs 15-18, but the vehicle lamp resin reflector 41 has a common configuration with the vehicle lamp resin reflector 1 of the first embodiment.
図５に示す、連続補強リブ４５は、下壁部８’の下面８ｅ’に一体化された第１リブ４５ａ、反射領域５’の裏面に一体化された第２リブ４５ｂ及び後壁部を備えない上壁部７’の上面７ｆ’（外周面）に一体化された第３リブ４５ｃを１本に連続一体形成したリブである。本実施形態の連続補強リブ４５によれば、上壁部に後壁部を有さない車両用灯具用樹脂製リフレクタであっても、第３リブ４５ｃを上壁部７’の上面７ｆ’に設けることで、上壁部７’及び下壁部８が、共に内側に倒れる変形を防止することが出来る。 The continuous reinforcing rib 45 shown in Figure 5 is a single, continuous rib formed by continuously integrating a first rib 45a integrated with the underside 8e' of the lower wall portion 8', a second rib 45b integrated with the back surface of the reflective area 5', and a third rib 45c integrated with the upper surface 7f' (outer peripheral surface) of the upper wall portion 7', which does not have a rear wall portion. According to the continuous reinforcing rib 45 of this embodiment, even in a resin reflector for a vehicle lamp that does not have a rear wall portion on the upper wall portion, providing the third rib 45c on the upper surface 7f' of the upper wall portion 7' can prevent both the upper wall portion 7' and the lower wall portion 8 from collapsing inward.
１ 車両用灯具用樹脂製リフレクタ
２ 反射部
２ａ 上端部
２ｂ 下端部
３～６ 反射領域
３ａ～６ａ 反射面
７ 上壁部
７ａ 上面
７ｂ 後壁部
７ｃ 下面
７ｅ 後面
７ｆ 上面
８ 下壁部
８ｅ 下面
９～１１ 仕切壁
１５～１８ 連続補強リブ
ｔ１ 反射部の肉厚
ｔ２ 上壁部及び下壁部の肉厚
1 Resin reflector 2 for vehicle lamps Reflector 2a Upper end 2b Lower end 3-6 Reflective area 3a-6a Reflective surface 7 Upper wall 7a Upper surface 7b Rear wall 7c Lower surface 7e Rear surface 7f Upper surface 8 Lower wall 8e Lower surface 9-11 Partition wall 15-18 Continuous reinforcing rib t1 Thickness t2 of reflective section Thickness of upper wall and lower wall
Claims (4)
れた上壁部と、前記反射部の下端部に一体に成形された下壁部と、を有する車両用灯具用
樹脂製リフレクタにおいて、
前記下壁部、前記反射部及び前記上壁部の各外周面上に跨がるように一体形成された、
連続補強リブを有し、
前記上壁部は、前記反射部の上端部から後方に突出する後壁部を備え、
前記連続補強リブが、前記下壁部、前記反射部及び前記上端部の前記後壁部の各外周面上に跨がるように連続一体形成されたことを特徴とする、車両用灯具用樹脂製リフレクタ。 A resin reflector for a vehicle lamp having a reflecting portion having a plurality of arranged forward reflecting areas, an upper wall portion integrally molded at an upper end of the reflecting portion, and a lower wall portion integrally molded at a lower end of the reflecting portion,
The lower wall portion, the reflecting portion, and the upper wall portion are integrally formed so as to straddle the outer peripheral surfaces of the lower wall portion, the reflecting portion, and the upper wall portion.
having a continuous reinforcing rib;
the upper wall portion includes a rear wall portion that protrudes rearward from an upper end of the reflecting portion,
A resin reflector for a vehicle lamp, characterized in that the continuous reinforcing rib is formed continuously and integrally so as to straddle the outer peripheral surfaces of the lower wall portion, the reflecting portion, and the rear wall portion of the upper end portion .
成されたことを特徴とする、請求項１に記載の車両用灯具用樹脂製リフレクタ。 The thickness of at least one of the upper wall portion and the lower wall portion is thinner than the thickness of the reflecting portion.
2. The resin reflector for a vehicle lamp according to claim 1, wherein the resin reflector is formed of a resin material .
する、請求項１に記載の車両用灯具用樹脂製リフレクタ。 2. The resin reflector for a vehicle lamp according to claim 1 , wherein the continuous reinforcing rib is formed on the back surface of each of the plurality of reflective areas of the reflective portion .
を特徴とする、請求項１に記載の車両用灯具用樹脂製リフレクタ。 2. The resin reflector for a vehicle lamp according to claim 1 , wherein a plurality of the continuous reinforcing ribs are formed on the back surfaces of the plurality of reflective areas of the reflective portion .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022045673A JP7765994B2 (en) | 2022-03-22 | 2022-03-22 | Resin reflectors for vehicle lighting fixtures |
| PCT/JP2023/009580 WO2023182043A1 (en) | 2022-03-22 | 2023-03-13 | Plastic reflector for vehicular light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022045673A JP7765994B2 (en) | 2022-03-22 | 2022-03-22 | Resin reflectors for vehicle lighting fixtures |
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| Publication Number | Publication Date |
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| JP2023139902A JP2023139902A (en) | 2023-10-04 |
| JP7765994B2 true JP7765994B2 (en) | 2025-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2022045673A Active JP7765994B2 (en) | 2022-03-22 | 2022-03-22 | Resin reflectors for vehicle lighting fixtures |
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| JP (1) | JP7765994B2 (en) |
| WO (1) | WO2023182043A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005019018A (en) | 2003-06-23 | 2005-01-20 | Koito Mfg Co Ltd | Vehicle lighting |
| JP2017076522A (en) | 2015-10-15 | 2017-04-20 | 本田技研工業株式会社 | Light source unit |
| JP2019174674A (en) | 2018-03-28 | 2019-10-10 | パナソニックＩｐマネジメント株式会社 | Mirror holding structure, mirror structure, image display system, moving object |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09330602A (en) * | 1996-06-07 | 1997-12-22 | Koito Mfg Co Ltd | Vehicle lighting |
| JPH10255516A (en) * | 1997-03-14 | 1998-09-25 | Koito Mfg Co Ltd | Vehicle lamp reflector and vehicle lamp using the same |
-
2022
- 2022-03-22 JP JP2022045673A patent/JP7765994B2/en active Active
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- 2023-03-13 WO PCT/JP2023/009580 patent/WO2023182043A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005019018A (en) | 2003-06-23 | 2005-01-20 | Koito Mfg Co Ltd | Vehicle lighting |
| JP2017076522A (en) | 2015-10-15 | 2017-04-20 | 本田技研工業株式会社 | Light source unit |
| JP2019174674A (en) | 2018-03-28 | 2019-10-10 | パナソニックＩｐマネジメント株式会社 | Mirror holding structure, mirror structure, image display system, moving object |
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| WO2023182043A1 (en) | 2023-09-28 |
| JP2023139902A (en) | 2023-10-04 |
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