JPH0361281B2 - - Google Patents
Info
- Publication number
- JPH0361281B2 JPH0361281B2 JP58183184A JP18318483A JPH0361281B2 JP H0361281 B2 JPH0361281 B2 JP H0361281B2 JP 58183184 A JP58183184 A JP 58183184A JP 18318483 A JP18318483 A JP 18318483A JP H0361281 B2 JPH0361281 B2 JP H0361281B2
- Authority
- JP
- Japan
- Prior art keywords
- focal length
- focal
- point
- paraboloids
- 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.)
- Expired - Lifetime
Links
- 230000004907 flux Effects 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は新規な車輌用灯具の反射鏡に関する。
詳しくは、前面の開口形状が正面から見て角形、
楕円形等の非円形である車輌用灯具の反射鏡にお
いて、反射面として有効に活用できる面の増大を
図り、光束を有効に利用できるようにした新規な
車輌用灯具の反射鏡を提供しようとするものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a novel reflector for a vehicle lamp.
In detail, the front opening shape is square when viewed from the front.
An object of the present invention is to provide a new reflector for a vehicle light that has a non-circular shape such as an ellipse, and increases the surface area that can be effectively used as a reflecting surface, thereby making it possible to effectively utilize the luminous flux. It is something to do.
背景技術とその問題点
車輌、例えば自動車に用いられる前照灯は光を
レンズに形成された各素子よつて制御して所定の
配光を得るものであるため、制御が楽な平行光束
を得ることのできる放物面反射鏡が使用される。
ところで、前照灯の前面形状が角形等の非円形で
ある場合、無効反射部が出来てしまうという問題
がある。BACKGROUND TECHNOLOGY AND PROBLEMS The headlights used in vehicles, such as automobiles, control the light through each element formed in a lens to obtain a predetermined light distribution, so they obtain parallel light flux that is easy to control. A parabolic reflector is used.
By the way, when the front surface shape of the headlamp is non-circular, such as a square shape, there is a problem that an ineffective reflective part is formed.
第１図は前面の開口形状が正面から見て角形で
ある反射鏡ａを示すものである。このような角形
の反射鏡ａにあつては、上下及び左右に光軸に対
して略平行な平面部ｂ，b′及びｃ，c′が出来てし
まい、フイラメントから発せられる光の量が少な
くなるという問題がある。 FIG. 1 shows a reflecting mirror a whose front opening has a rectangular shape when viewed from the front. In the case of such a rectangular reflecting mirror a, flat parts b, b' and c, c' that are approximately parallel to the optical axis are formed on the top and bottom, left and right sides, and the amount of light emitted from the filament is small. There is a problem with becoming.
第２図Ａは第１図の反射鏡ａをその対角線に沿
つて切断した図であるが、この断面では、開口線
ｄまでの部分が光軸Ｘ−Ｘに平行な反射光を発す
る部分となるため、フイラメントｅから発せられ
た光は角度α1の範囲のものが有効に利用できる。
しかしながら、第２図Ｂ（正面図中央縦断面図）
や第２図Ｃ（正面図中央横断面図）で示す断面で
は、平面部ｂ，b′やｃ，c′が奥まで入り込んでい
て、フイラメントｅから発せられた光は角度α2や
α3の極めて狭い範囲のものしか有効に利用でき
ず、平面部ｂ，b′やｃ，c′に向う角度β2やβ3の範
囲のものは有効な光としては全く利用されず、従
つて、第１図に示した従来の車輌用灯具の反射鏡
では、利用光束の無駄が多いという問題があつ
た。更に、回転放物面部ｆと平面部ｂ，b′，ｃ，
c′との接続部分には角が出来るために、加工精度
を高くすることができないという問題があつた。
特に、反射鏡を金属のプレス形成によつて形成す
る場合には尚更であつた。 FIG. 2A is a cross-sectional view of the reflecting mirror a in FIG. 1 taken along its diagonal line. In this cross section, the part up to the aperture line d is the part that emits reflected light parallel to the optical axis XX. Therefore, the light emitted from the filament e can be effectively used within the angle α 1 range.
However, Fig. 2B (front view center vertical sectional view)
In the cross section shown in Fig. 2 and C (front view center cross-sectional view), the flat parts b, b', c, and c' penetrate deeply, and the light emitted from the filament e is reflected at angles α 2 and α 3 . Only a very narrow range of light can be used effectively, and light in the range of angles β 2 and β 3 toward plane parts b, b', c, and c' cannot be used as effective light at all, and therefore, The conventional vehicular lamp reflector shown in FIG. 1 has a problem in that a lot of the utilized luminous flux is wasted. Furthermore, the paraboloid of revolution part f and the flat parts b, b', c,
There was a problem that the machining accuracy could not be increased because a corner was formed at the connection part with c'.
This is especially true when the reflecting mirror is formed by press forming metal.
発明の目的
そこで、本考案は、上記した従来の車輌用灯具
の反射鏡にあつた問題点に鑑みて為されたもので
あり、前面の開口形状が正面から見て角形、楕円
形等の非円形である車輌用灯具の反射鏡におい
て、反射面として有効に活用できる面の増大を図
り、光束を有効に利用できるようにした新規な車
輌用灯具の反射鏡を提供することを目的とする。Purpose of the Invention The present invention was devised in view of the above-mentioned problems with the conventional reflecting mirrors of vehicle lamps. To provide a novel reflective mirror for a vehicle lamp which is circular and has a surface area that can be effectively used as a reflecting surface, thereby making it possible to effectively utilize the luminous flux.
発明の概要
本発明車輌用灯具の反射鏡は、上記した目的を
達成するために、前面の開口形状が正面から見て
角形、楕円形等の非円形であり、内面の反射面は
焦点距離が連続的に変化せしめられた無数の微小
放物面によつて形成され、これら微小放物面は開
口部径の最も小さい方向に沿うものの焦点距離が
最も小さく開口部径の最も大きい方向に沿うもの
の焦点距離が最も大きく、この両者の間にある微
小放物面の焦点距離が連続的に変化せしめられて
いると共に、これら全ての微小放物面の焦点位置
が略同一の箇所にあることを特徴とする。Summary of the Invention In order to achieve the above-mentioned object, the reflective mirror of the vehicle lamp of the present invention has a front aperture shape that is non-circular, such as a square or an ellipse when viewed from the front, and an inner reflective surface that has a focal length. It is formed by countless minute paraboloids that change continuously, and these minute paraboloids are along the direction of the smallest aperture diameter, while the focal length is the smallest and the focal length is along the direction of the largest aperture diameter. The focal length is the largest, and the focal length of the small paraboloid between the two is continuously changed, and the focal position of all these small paraboloids is at approximately the same location. shall be.
実施例
以下に本発明車輌用灯具の反射鏡の詳細を図示
した実施例に従つて説明する。Embodiments The details of the reflecting mirror of the vehicle lamp of the present invention will be described below with reference to illustrated embodiments.
図中１は本発明に係る反射鏡である。この反射
鏡１は金属材料のプレス加工により形成されてお
り、前面の開口部２は同一平面内にあり、かつ、
正面から見て横長の長方形状をしている。また、
反射鏡１の後部中央には略円形の取付孔３が形成
され、該取付孔３には図示しない電球が取着され
か、あるいは、電球が挿通されて反射鏡１の内側
に配置される。 1 in the figure is a reflecting mirror according to the present invention. This reflecting mirror 1 is formed by pressing a metal material, and the front opening 2 is in the same plane, and
When viewed from the front, it has an oblong rectangular shape. Also,
A substantially circular mounting hole 3 is formed at the center of the rear of the reflecting mirror 1, and a light bulb (not shown) is attached to the mounting hole 3, or the light bulb is inserted therethrough and placed inside the reflecting mirror 1.
そして、上記反射鏡１はその中心を通つて延び
る無数の微小放物面によつて形成されていて、そ
して、これら無数の微小放物面は開口部形の小さ
い方向に沿うものの焦点距離が小さく開口部形の
大きい方向に沿うものの焦点距離が大きく、この
両者の間にある微小放物面の焦点距離が連続的に
変化せしめられていると共に、これら全ての微小
放物面の焦点位置が略同一の箇所４にあるように
されている。このことを第４図によつて説明す
る。 The reflecting mirror 1 is formed by countless minute paraboloids extending through its center, and these countless minute paraboloids have small focal lengths along the direction of the small aperture shape. The focal length of the object along the direction of the large aperture shape is large, and the focal length of the microparaboloid between the two is continuously changed, and the focal position of all of these microparaboloids is approximately They are located at the same location 4. This will be explained with reference to FIG.
第４図において、線５は反射鏡の開口線を示す
もので、長方形を為している。６，６，…はそれ
ぞれ反射鏡１の正面から見て中心を通る放物線で
ある。そのうち、６1は開口部形の最も小さい部
分を横切るように配置されている放物線であり、
長方形５の長辺５1，５1の中心点７1，７1を結ん
で延びている。そして、この放物線６1の焦点距
離が最も短かく、また、その焦点位置は点４にあ
る。６2及び６2は長方形５の対角７2，７2及び７
２，７2間を結んで延びている放物線であり、この
放物線６2，６2の焦点距離が最も長く、かつ、そ
の焦点位置は点４にある。そして、図示はしてい
ないが、この放物線６1と６2，６2との間に配置
される放物線は長方形５の一方の長辺５1上の点
から他方の長辺５1上の前記点と長方形５の中心
を対称点とする点対称位置までの間を延びてお
り、かつ、それら放物線の焦点距離が点７1から
角７2に行くに従つて長くなり、かつ、焦点位置
は点４にあるようにされる。６3は長方形５の短
辺５2，５2の中心点７3，７3間を結んで延びる放
物線であり、この放物線６3の焦点距離は放物線
６2の焦点距離より短かく放物線６1の焦点距離よ
りは長くされている。また、放物線６3の焦点位
置も点４にある。そして、図示はしていないが、
この放物線６3と放物線６2，６2との間に配置さ
れる放物線は長方形５の一方の短辺５2上の点か
ら他方の短辺５2上の上記点と長方形の中心を対
称点とする点対称位置までの間を延びており、か
つ、それら放物線の焦点距離は点７3から角７2に
行くに従つて長くなり、かつ、焦点位置は点４に
あるようにされている。 In FIG. 4, line 5 indicates the aperture line of the reflecting mirror, which has a rectangular shape. 6, 6, . . . are parabolas passing through the center of the reflecting mirror 1 when viewed from the front. Among them, 6 1 is a parabola arranged to cross the smallest part of the opening shape,
It extends by connecting the center points 7 1 , 7 1 of the long sides 5 1 , 5 1 of the rectangle 5 . The focal length of this parabola 6 1 is the shortest, and its focal position is at point 4. 6 2 and 6 2 are diagonals 7 2 , 7 2 and 7 of rectangle 5
The parabolas 6 2 and 6 2 have the longest focal length, and their focal position is at point 4 . Although not shown, the parabola disposed between these parabolas 6 1 and 6 2 , 6 2 extends from the point on one long side 5 1 of the rectangle 5 to the point on the other long side 5 1 of the rectangle 5. It extends between the point and the point symmetrical position with the center of the rectangle 5 as the symmetrical point, and the focal length of these parabolas increases as it goes from the point 71 to the corner 72 , and the focal position is Point 4 is applied. 6 3 is a parabola extending between the center points 7 3 and 7 3 of the short sides 5 2 and 5 2 of the rectangle 5, and the focal length of this parabola 6 3 is shorter than the focal length of the parabola 6 2 , and the parabola 6 1 The focal length of the lens is longer than that of the lens. Further, the focal point position of the parabola 6 3 is also at point 4. And, although not shown,
The parabola placed between this parabola 6 3 and the parabolas 6 2 and 6 2 is a symmetrical point from the point on one short side 5 2 of the rectangle 5 to the above point on the other short side 5 2 and the center of the rectangle. and the focal length of these parabolas increases from point 73 to corner 72 , and the focal point is at point 4. .
しかして、上記のような放物線６，６，…を無
数の連続して形成してゆき、これを微小放物面と
見れば、前述した如き反射鏡１が形成される。そ
して、その場合、第５図に示すように中心付近に
４個の山８，８，…が形成されるが、実際上は、
この部分は電球取付孔３が（２点鎖線にて示す。）
が形成される領域内に含まれることになり、実際
に使用に供される反射鏡にはこのような山８，
８，…は現われてこない。 If a countless number of parabolas 6, 6, . In that case, four peaks 8, 8,... are formed near the center as shown in Fig. 5, but in reality,
This part is the light bulb mounting hole 3 (indicated by the two-dot chain line).
are included in the area where the peaks 8, 8, and 8
8,... does not appear.
以上に説明したところの本発明に係る反射鏡１
においては、その開口部２の正面形状が長方形で
あるのにもかかわらず、その内面は開口縁に至る
まで全ての面が焦点位置４に配置された光源から
発せられる光を光軸Ｘ−Ｘと平行な光として反射
する有効反射面として活用されることになり、光
源から発せられた光の光束利用立体角αが大きく
なり、それだけ利用光束数が増加し、開口部面積
が同じであれば、従来のものに比して、遥かに明
るい前照灯を得るのに寄与する。 Reflector 1 according to the present invention as explained above
Although the front shape of the aperture 2 is rectangular, all surfaces of the inner surface up to the edge of the aperture direct the light emitted from the light source located at the focal point 4 along the optical axis X-X. It will be used as an effective reflecting surface that reflects light parallel to the light source, and the solid angle α for utilizing the luminous flux of the light emitted from the light source will increase, and the number of luminous fluxes used will increase accordingly.If the aperture area is the same, , contributes to obtaining a much brighter headlight compared to the conventional one.
発明の効果
以上に記載したところから明らかなように、本
考案車輌用灯具の反射鏡は、前面の開口形状が正
面から見て角形、楕円形等の非円形であり、内面
の反射面は焦点距離が連続的に変化せしめられた
無数の微小放物面によつて形成され、これら微小
放物面は開口部径の最も小さい方向に沿うものの
焦点距離が最も小さく開口部径の最も大きい方向
に沿うものの焦点距離が最も大きく、この両者の
間にある微小放物面の焦点距離が連続的に変化せ
しめられていると共に、これら全ての微小放物面
の焦点位置が略同一の箇所にあることを特徴とす
る。Effects of the Invention As is clear from the above description, in the reflecting mirror of the vehicle lamp of the present invention, the front opening shape is a non-circular shape such as a square or an ellipse when viewed from the front, and the inner reflecting surface is a focal point. It is formed by countless minute paraboloids whose distances are continuously changed, and these minute paraboloids are along the direction of the smallest aperture diameter, but the focal length is the smallest and the focal length is along the direction of the largest aperture diameter. The focal length of the one along the line is the largest, and the focal length of the small paraboloid between them is continuously changed, and the focal position of all these small paraboloids is at approximately the same location. It is characterized by
従つて、本発明によれば、前面の開口形状が正
面から見て角形、楕円形等の非円形である車輌用
灯具の反射鏡において、反射面として有効に活用
できる面の増大を図り、光束を有効に利用できる
ようにした新規な車輌用灯具の反射鏡を得ること
ができる。 Therefore, according to the present invention, in a reflector for a vehicle lamp whose front opening shape is non-circular, such as a square or an ellipse when viewed from the front, the surface that can be effectively used as a reflection surface is increased, and the luminous flux is It is possible to obtain a novel reflector for a vehicular lamp that makes it possible to effectively utilize the light.
第１図は従来の車輌用灯具の反射鏡の一例を示
す斜視図、第２図Ａ，Ｂ，Ｃは第１図の反射鏡を
それぞれ異なる部位切断して示す断面図、第３図
は本発明車輌用灯具の反射鏡の実施の一例を示す
斜視図、第４図は本発明車輌用灯具の反射鏡にお
ける微小放物面の基本的な考え方を示す斜視図、
第５図は第４図で示した考え方に従つて無数の微
小放物面を連続して形成した形状を示す図、第６
図は本発明車輌用灯具の反射鏡の正面図、第７図
は第６図のＡ−Ａ線に沿う断面図、第８図は第６
図Ｂ−Ｂ線に沿う断面図、第９図は第６図のＣ−
Ｃ線に沿う断面図である。
符号の説明、１…車輌用灯具の反射鏡、２…開
口部、４…焦点位置。
Fig. 1 is a perspective view showing an example of a reflector for a conventional vehicle lamp; Figs. 2A, B, and C are sectional views showing different parts of the reflector in Fig. 1; and Fig. 3 is a main FIG. 4 is a perspective view showing an example of the implementation of the reflector of the vehicle light according to the present invention; FIG.
Figure 5 is a diagram showing a shape in which countless minute paraboloids are successively formed according to the concept shown in Figure 4;
The figure is a front view of the reflector of the vehicle lamp of the present invention, FIG. 7 is a sectional view taken along line A-A in FIG. 6, and FIG.
A cross-sectional view taken along the line B-B in Figure 9.
It is a sectional view along the C line. Explanation of symbols: 1...Reflector of vehicle lamp; 2... Opening; 4... Focus position.
Claims (1)
等の非円形であり、内面の反射面は焦点距離が連
続的に変化せしめられた無数の微小放物面によつ
て形成され、これら微小放物面は開口部径の最も
小さい方向に沿うものの焦点距離が最も小さく開
口部径の最も大きい方向に沿うものの焦点距離が
最も大きく、この両者の間にある微小放物面の焦
点距離が連続的に変化せしめられていると共に、
これら全ての微小放物面の焦点位置が略同一の箇
所にあることを特徴とする車輌用灯具の反射鏡。1 The front aperture shape is non-circular, such as a square or ellipse when viewed from the front, and the inner reflective surface is formed by countless minute paraboloids whose focal lengths are continuously changed. The paraboloid has the smallest focal length along the direction of the smallest aperture diameter, and the largest focal length along the direction of the largest aperture diameter, and the focal length of the microparaboloid between the two is continuous. As well as being forced to change,
A reflector for a vehicle lamp characterized in that the focal positions of all of these minute paraboloids are located at approximately the same location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18318483A JPS6077301A (en) | 1983-10-03 | 1983-10-03 | Reflecting mirror of lamp implement for veicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18318483A JPS6077301A (en) | 1983-10-03 | 1983-10-03 | Reflecting mirror of lamp implement for veicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6077301A JPS6077301A (en) | 1985-05-01 |
| JPH0361281B2 true JPH0361281B2 (en) | 1991-09-19 |
Family
ID=16131236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18318483A Granted JPS6077301A (en) | 1983-10-03 | 1983-10-03 | Reflecting mirror of lamp implement for veicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6077301A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6267405U (en) * | 1985-10-17 | 1987-04-27 | ||
| FR2600752B1 (en) * | 1986-06-24 | 1988-08-26 | Signal Vision Sa | EXTRA-FLAT PROJECTOR FOR MOTOR VEHICLES |
| JPS6427906U (en) * | 1987-08-12 | 1989-02-17 | ||
| JP2902464B2 (en) * | 1990-09-04 | 1999-06-07 | 旭光学工業株式会社 | Reflective lighting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50127487A (en) * | 1974-03-05 | 1975-10-07 | ||
| JPS5216133U (en) * | 1975-07-22 | 1977-02-04 |
-
1983
- 1983-10-03 JP JP18318483A patent/JPS6077301A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50127487A (en) * | 1974-03-05 | 1975-10-07 | ||
| JPS5216133U (en) * | 1975-07-22 | 1977-02-04 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6077301A (en) | 1985-05-01 |
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