JPH0426161B2 - - Google Patents

Description

【発明の詳細な説明】 ［産業上の利用分野］ 本発明はLEDを光源とし、テール又はストツ
プランプとして使用される車輌用灯具に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vehicle lamp that uses an LED as a light source and is used as a tail or stop lamp.

［従来技術］ LEDを光源とする一般的な灯具又表示装置に
あつては、プリント基板に２本のリードフレーム
を介してLEDを取付け、該LEDから所定の配光
を得るためにレンズが取付けられる構成になつて
いる。[Prior art] In general lamps and display devices that use LEDs as light sources, the LEDs are attached to a printed circuit board via two lead frames, and a lens is attached to obtain a predetermined light distribution from the LEDs. It is structured so that it can be used.

このような構成のLEDを、仮りにテール又は
ストツプランプ等の車輌用灯具として使用する場
合には、第５〜６図に示した構成になるものと考
えられる。この場合の灯具は、ストツプランプの
例であり、例えば内部に２個のLED１，２が配
設されたものである。これらLEDは夫々２本の
リードフレーム３，４を介してプリント基板５に
取付けられ、該プリント基板５がベース６に取付
けられると共に正面視が長方形で且つ断面がコ字
状を呈するレンズ７が前記LED１，２を包む込
むようにしてベースに取付けられる。そして前記
レンズ７には正面側の内側に適宜のレンズカツト
７ａが施されている。 If an LED having such a configuration is to be used as a vehicle lamp such as a tail lamp or stop lamp, the configuration shown in FIGS. 5 and 6 will be considered. The lamp in this case is an example of a stop lamp, and has, for example, two LEDs 1 and 2 disposed inside. These LEDs are attached to a printed circuit board 5 via two lead frames 3 and 4, respectively, and the printed circuit board 5 is attached to a base 6, and a lens 7, which is rectangular in front view and U-shaped in cross section, is attached to the It can be attached to the base so as to wrap around LEDs 1 and 2. The lens 7 is provided with a suitable lens cut 7a on the inside of the front side.

このような構成であると、LED１，２から放
射される前面側の光束ａがレンズカツト７ａを通
して外部に取出され、前面から見て範囲ｌの部分
が光輝する。又、LED１，２から放射される側
面への光束ｂはレンズ７の側面に向うだけである
から前面からは全く視認できない。従つて、単に
LEDをこの種灯具に使用したとしても、範囲ｌ
の部分しか光輝しないため視認性が悪いという問
題点が生ずるばかりでなく、LEDから発生され
る光束の利用率が著しく悪く、しかも角形のレン
ズに対して円形のスポツト的照明となるので点灯
のフイリングも悪いという問題点が生ずることに
なる。 With such a configuration, the light beam a on the front side emitted from the LEDs 1 and 2 is extracted to the outside through the lens cut 7a, and the area l when viewed from the front shines. Further, the light flux b emitted from the LEDs 1 and 2 to the side faces only goes to the side faces of the lens 7, so it cannot be seen from the front at all. Therefore, simply
Even if LEDs are used in this type of lighting, the range
Not only does it cause the problem of poor visibility because only the part of the LED shines, but the utilization of the luminous flux generated by the LED is extremely poor, and the illumination is circular and spot-like compared to the rectangular lens, making it difficult to fill the lighting area. The problem arises that the quality is also poor.

［発明が解決しようとする問題点］ 本発明は車輌用灯具の光源としてLEDを使用
した場合に生ずる視認性の問題点及び光束の利用
率の問題点、更には点灯のフイリングの問題点を
解決しようとするものである。[Problems to be Solved by the Invention] The present invention solves the visibility problem, the luminous flux utilization rate problem, and the lighting filling problem that occur when an LED is used as a light source for a vehicle lamp. This is what I am trying to do.

［問題点を解決するための手段］ 本発明は前記した問題点を解決する具体的手段
として、ベースにLEDが配設されたプリント基
板を取付け、前記LEDに透明な反射部材を取付
け、該反射部材を取囲むようにしてレンズを配設
し、前記反射部材はその正面視の形状を長方形に
形成すると共に、略中央部に前記LEDが嵌る孔
を設け、背面側は前記LEDから側面に出る放射
光を前面に向けて略平行光線に反射させるドーム
状の曲面に形成し、前記中央部の孔はLEDが挿
着される部位を筒状に形成すると共に前面を角形
に形成し、前記筒状から角形に至る間を徐々に角
形に形成したことを特徴とする車輌用灯具を提供
しようとするものであつて、前記反射部材を
LEDに取付けることによつて、LEDの側面から
放射される光束を前面側への平行光線として利用
でき有効な光束を増すことによつて視認性が良好
となるばかりでなく、中央部の孔を角形にするこ
とによつて角形の灯具としての点灯フイリングが
良好となるのである。[Means for Solving the Problems] The present invention provides specific means for solving the above-mentioned problems by attaching a printed circuit board on which an LED is arranged to a base, attaching a transparent reflective member to the LED, and A lens is arranged so as to surround the member, and the reflecting member has a rectangular shape when viewed from the front, and a hole into which the LED fits is provided approximately in the center, and the back side has a hole for emitting light emitted from the LED to the side. is formed into a dome-shaped curved surface that reflects substantially parallel light toward the front, and the center hole has a cylindrical portion where the LED is inserted, and a rectangular front surface. An object of the present invention is to provide a vehicular lamp characterized in that the space leading to the rectangular shape is gradually formed into a rectangular shape, and the reflective member is
By attaching it to an LED, the luminous flux emitted from the side of the LED can be used as a parallel ray toward the front side, increasing the effective luminous flux, which not only improves visibility, but also improves visibility by increasing the effective luminous flux. By making it rectangular, the lighting filling as a rectangular lamp becomes better.

［実施例］ 次に本発明を図示の実施例により更に詳しく説
明すると、図示の灯具は複数個のLEDを使用し
た場合のストツプランプである。１１，１２は光
源となるLEDであり、該LEDは一般に使用され
ているものがそのまま使用される。これらLED
１１，１２は夫々２本のリードフレーム１３，１
４を介してプリント基板１５に取付けられ、該プ
リント基板はベース１６に取付けられる。このベ
ースにはストツプランプ用のレンズ１７が取付け
られるが、該レンズ１７の取付けに先立つて前記
各LED１１，１２に夫々同型の反射部材１８が
取付けられる。[Example] Next, the present invention will be explained in more detail with reference to the illustrated embodiment. The illustrated lamp is a stop lamp using a plurality of LEDs. Reference numerals 11 and 12 indicate LEDs serving as light sources, and commonly used LEDs are used as they are. These LEDs
11 and 12 are two lead frames 13 and 1, respectively.
4 to a printed circuit board 15, and the printed circuit board is mounted to a base 16. A stop lamp lens 17 is attached to this base, but prior to attaching the lens 17, reflective members 18 of the same type are attached to each of the LEDs 11 and 12, respectively.

前記レンズ１７の形状はストツプランプとして
適した正面視が長方形であると共に断面がコ字状
を呈し、前面側の内側面には適宜のレンズカツト
１７ａが施されている。 The shape of the lens 17 is rectangular in front view suitable as a stop lamp, and has a U-shape in cross section, and a suitable lens cut 17a is provided on the inner surface on the front side.

前記反射部材１８は例えば透明プラスチツク又
はゴム等で形成され、正面視が長方形を呈する。
この場合の長方形の長辺の長さは前記したレンズ
１７の約半分であり、２個のLED１１，１２に
取付けられて内側に収まる大きさである。尚両方
のLEDに取付けられる反射部材は実質的に同一
形状であるのでその一つについて説明する。 The reflecting member 18 is made of, for example, transparent plastic or rubber, and has a rectangular shape when viewed from the front.
In this case, the length of the long side of the rectangle is approximately half that of the lens 17 described above, and is large enough to be attached to the two LEDs 11 and 12 and fit inside. Note that the reflecting members attached to both LEDs have substantially the same shape, so one of them will be explained.

前記反射部材１８は、第３図に示したように、
正面視が長方形であり、その中央部に背面側にま
で貫通する筒状の孔１９が設けられ、該孔に前記
LED１１が背面側から挿着して取付けられる。
従つて、この孔１９はLEDが取付けられる背面
側の一定の流さ範囲、即ちLEDが取付けられる
部位１９ａをLEDの外形に合せて筒状に形成し、
反射部材１８の前面に開口する部位１９ｂを角形
（正方形又は長方形）に形成し、前記筒状の部位
から角形の部位置に至る間を筒形から角形に向け
て徐々に角形に形成してある。反射部材１８の背
面側は取付けられたLED１１から側面に放射さ
れる光束を前面側に向けて略平行光線になるよう
反射させるドーム状の曲面２０に形成され、前記
ドーム状の曲面２０と前記正面視の長方形の各辺
との境にカツト部２１が成形されている。尚、背
面側には前記孔１９の外周縁に沿つて壁部２２が
設けられている。又、前記レンズ１７におけるレ
ンズカツト１７ａは、凸レンズに限らず、第４図
に示したように凹レンズのレンズカツトを施すこ
とができることは勿論である。 The reflecting member 18, as shown in FIG.
It has a rectangular shape when viewed from the front, and a cylindrical hole 19 that penetrates to the back side is provided in the center of the rectangle.
The LED 11 can be installed by inserting it from the back side.
Therefore, this hole 19 has a certain flow range on the back side where the LED is attached, that is, the portion 19a where the LED is attached, is formed into a cylindrical shape to match the outer shape of the LED.
The portion 19b opening on the front surface of the reflecting member 18 is formed into a square shape (square or rectangle), and the portion from the cylindrical portion to the square portion position is gradually shaped into a square shape from the cylindrical shape to the square shape. . The back side of the reflecting member 18 is formed into a dome-shaped curved surface 20 that reflects the luminous flux emitted from the attached LED 11 to the side surface toward the front side so as to become approximately parallel rays, and the dome-shaped curved surface 20 and the front surface Cut portions 21 are formed at the boundaries of each side of the visible rectangle. Note that a wall portion 22 is provided along the outer peripheral edge of the hole 19 on the back side. Further, the lens cut 17a of the lens 17 is not limited to a convex lens, but it goes without saying that a concave lens can be formed as shown in FIG.

前記構成を有する本発明の車輌用灯具は、第２
図に示したように、LED１１から放射される前
面側への光束ａは、そのまま孔角形の部位１９ｂ
を通つてレンズ１７に至り外部に取出され、側面
への光束ｂは前記反射部材１８の曲面２０によつ
て前面側への略平行光線に反射され、レンズ１７
に通して外部に取出される。従つて、一般的に利
用されなかつたLEDから側面に出る光束を反射
部材１８を使用することによつてほとんど全部前
面側に平行光線として反射させることができるの
で、前面側のレンズ全面が光輝し全体的な照度ア
ツプが図れるのである。この場合特に、中央部の
孔１９が反射部材１８の前面側において角形に形
成されているので、LED１１の頂部即ち前面側
から出る光束が円形のスポツト的ではなく角形に
拡がつた状態となり、正面視において角形の灯具
の形状とマツチしたものとなり、しかもLED１
１の頂部から放射される光束が小さく円形に纒め
られることがないのでレンズ前面が略均等に光輝
し、それによつても視認性が良好となるのであ
る。尚、図示の実施例はストツプランプであるが
他のランプの場合でも同様である。 The vehicular lamp of the present invention having the above configuration has a second
As shown in the figure, the light flux a emitted from the LED 11 toward the front side is directly transmitted to the rectangular hole portion 19b.
The light beam b toward the side surface is reflected by the curved surface 20 of the reflecting member 18 into substantially parallel light beams toward the front side, and the light beam b reaches the lens 17 through the lens 17.
is taken out to the outside through the Therefore, by using the reflecting member 18, almost all of the luminous flux emitted from the side of the LED, which is not generally used, can be reflected to the front side as parallel rays, so that the entire surface of the lens on the front side shines. The overall illuminance can be increased. In this case, in particular, since the central hole 19 is formed in a square shape on the front side of the reflecting member 18, the light beam emitted from the top of the LED 11, that is, the front side, is not in a circular spot but spread out in a square shape. Visually, it matches the shape of a rectangular lamp, and LED1
Since the light beam emitted from the top of lens 1 is small and not concentrated in a circular shape, the front surface of the lens shines almost uniformly, which also improves visibility. Although the illustrated embodiment is a stop lamp, the same applies to other lamps.

［発明の効果］ 以上説明したように本発明に係る車輌用灯具
は、正面視が角形で背面側がドーム状の曲面に形
成されるとともに中央部に筒状の孔を設けた反射
部材をLEDに取付けた構成にしたことにより、
LEDから放射される前面側への光束に加え、側
面に出る光束も前記曲面によつて、前面側への略
平行光線に反射し有効光線として利用できるので
光束の利用率を著しく向上させ、灯具全体の照度
アツプを図つて視認性を向上させることができる
と同時に、中央部に設けた孔をLEDが挿着され
る部位において筒状にし、前面側の部位において
角形に形成してあるので、LEDの取付状態が安
定すると共に、LEDの前面に放射される光束が
角形に拡がつて灯具形状にマツチし、点灯の体裁
が良いという優れた効果を奏する。[Effects of the Invention] As explained above, the vehicle lamp according to the present invention has a rectangular shape when viewed from the front, a dome-shaped curved surface on the back side, and a reflective member having a cylindrical hole in the center as an LED. By using the installed configuration,
In addition to the luminous flux emitted from the LED toward the front side, the luminous flux emitted from the side is also reflected by the curved surface into approximately parallel rays toward the front side and can be used as effective rays, so the utilization rate of the luminous flux is significantly improved, and the lighting The overall illuminance can be increased to improve visibility, and at the same time, the hole in the center is made cylindrical in the part where the LED is inserted, and square in the part on the front side. In addition to stabilizing the mounting condition of the LED, the luminous flux emitted from the front of the LED spreads out into a rectangular shape and matches the shape of the lamp, resulting in an excellent lighting effect.

又、反射部材をゴム等の軟質材料で形成するこ
とにより、LEDとの嵌着状態が安定し、更に反
射部材を灯具の形状に合せてその正面形状を種々
の形状に形成でき、その正面全体から光束が取出
せるので灯具照射面がスポツト的ではなく全体的
に光輝し、それによつても視認性が向上する等の
種々の優れた効果も奏する。 In addition, by forming the reflective member from a soft material such as rubber, the fitting state with the LED is stable, and the front face shape of the reflective member can be formed into various shapes to match the shape of the lamp. Since the luminous flux can be extracted from the lamp, the irradiated surface of the lamp shines not in spots, but as a whole, and this also brings about various excellent effects such as improved visibility.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係る車輌用灯具の一部を切欠
いて示した正面図、第２図は第１図の−線に
沿う断面図、第３図は同灯具に組込まれる反射部
材の斜視図、第４図は第２図ので示した部分の
他の例を示す断面図、第５図は一般的なLEDを
本発明と同じ灯具に配設した場合の第１図と同様
の正面図、第６図は第５図の−線に沿う断面
図である。 １１，１２……LED、１３，１４……リード
フレーム、１５……プリント基板、１６……ベー
ス、１７……レンズ、１７ａ……レンズカツト、
１８……反射部材、１９……孔、１９ａ……筒状
の部位、１９ｂ……角形の部位、２０……ドーム
状の曲面、２１……カツト部。 Fig. 1 is a partially cutaway front view of a vehicle lamp according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a perspective view of a reflective member incorporated in the lamp. Figure 4 is a sectional view showing another example of the part shown in Figure 2, and Figure 5 is a front view similar to Figure 1 when a general LED is installed in the same lamp as the present invention. , FIG. 6 is a sectional view taken along the - line in FIG. 5. 11, 12... LED, 13, 14... Lead frame, 15... Printed circuit board, 16... Base, 17... Lens, 17a... Lens cut,
18... Reflective member, 19... Hole, 19a... Cylindrical portion, 19b... Square portion, 20... Dome-shaped curved surface, 21... Cut portion.

Claims (1)

【特許請求の範囲】 １ ベースにLEDが配設されたプリント基板を
取付け、前記LEDに透明な反射部材を取付け、
該反射部材を取囲むようにしてレンズを配設し、
前記反射部材はその正面視の形状を長方形に形成
すると共に、略中央部に前記LEDが嵌る孔を設
け、背面側は前記LEDから側面に出る放射光を
前面に向けて略平行光線に反射させるドーム状の
曲面に形成し、前記中央部の孔はLEDが挿着さ
れる部位を筒状に形成すると共に前面を角形に形
成し、前記筒状から角形に至る間を徐々に角形に
形成したことを特徴とする車輌用灯具。 ２ 前記反射部材を透明なプラスチツク又はゴム
で形成したことを特徴とする前記１項記載の車輌
用灯具。[Claims] 1. A printed circuit board on which an LED is arranged is attached to a base, a transparent reflective member is attached to the LED,
A lens is arranged to surround the reflective member,
The reflecting member has a rectangular shape when viewed from the front, and has a hole approximately in the center into which the LED fits, and the rear side reflects the emitted light emitted from the LED to the side into approximately parallel light rays toward the front. It is formed into a dome-shaped curved surface, and the center hole has a cylindrical part where the LED is inserted, and a square front surface, and the part between the cylindrical shape and the square shape is gradually shaped into a square shape. A vehicle lamp characterized by: 2. The vehicle lamp according to item 1, wherein the reflective member is made of transparent plastic or rubber.