JP4023153B2 - Vehicle lighting - Google Patents

Description

ここでの関係は、図４に示すように、ｈは肉厚、ｄは垂直方向のピッチであり、Ｒは曲率である。
【００１８】
従って、例えば、第１ブロックＢ１の場合、表面側は、垂直方向のピッチｄが面沿いの間隔４ミリメートルをサイン４７．５度で割ると，５．４２５であり、
プリズム高さである肉厚ｈは、【数１】によると、０．４２ミリメートルになる。同裏面側は、垂直方向のピッチｄが面沿いの間隔４ミリメートルをサイン４５度で割ると，５．６５７であり、プリズム高さである肉厚ｈは、【数１】によると、０．４５６ミリメートルになる。
【００１９】
このように、プリズムＰ１，Ｐ２の曲率Ｒが小さいほど、光源１０からの光が拡散するので、第４〜６ブロックＢ４〜Ｂ６は、第１〜３ブロックＢ１〜Ｂ３及び第７〜９ブロックＢ７〜Ｂ９より光の拡散が大きくなり、外側に配される第１〜３ブロックＢ１〜Ｂ３及び第７〜９ブロックＢ７〜Ｂ９の拡散を小さくして配光のバランスを取るようにしている。
【００２０】
こうして、加工線１６，１７が斜めに連続することで、斜めなりに光源１０からの光を拡散して見栄えのアクセントが生じることになり、見栄え上新規な灯具とすることができる。また、アウタレンズ１２の表裏のプリズムＰ１，Ｐ２が、垂直及び水平の単純な曲面としたことで、測定ポイントに光が届くことになり、配光を成立させることができる。しかも、このアウタレンズ１２が、プリズムＰ１、Ｐ２付き独特の複眼レンズ的効果を発揮することができる。
【００２１】
また、この実施形態では、前記アウタレンズ１２の断面形状が、波状をなすため、アウタレンズ１２自体の強度が増すと共に外部からの光が乱反射されることが可能になり、非点灯時におけるアウタレンズ１２の存在感を高めることができる。また、このことにより、前記フロントターンシグナルランプ３が車両の端に配されていれば、車両の左右幅が歩行者などに確認できることで、歩行者などの安全により寄与することになる。
【００２２】
また、前記アウタレンズ１２には、着色されてなるため、保護者などから、フロントターンシグナルランプ３の存在感がより増すことになる。
【００２３】
アウタレンズ１２の表裏のプリズムＰ１、Ｐ２が、互いに交差する状態で形成されているため、光源１０の像が格子状に整列し、見映えが良い。
【００２４】
この実施形態のアウタレンズ１２は、その表裏両面にプリズムＰ１、Ｐ２が形成されているため、光源１０に非点灯時においては、外光の乱反射により虹色に見え、非点灯時における見映えも良い。
【００２５】
また、表裏のプリズムＰ１、Ｐ２のピッチは、同ピッチに限定されるものではなく、異なるピッチにしても良いし、それぞれのピッチを異なるようにしても良い。また、加工線１６，１７の角度をさまざまに変更しても良い。このようにピッチを変えたり、加工線１６，１７の角度を変えることにより、光源の大きさが変わって見えることになり、見栄えのアクセントになる。
【００２６】
尚、以上の実施形態では、本発明が適用される灯具として、フロントターンシグナルランプ３を例にしたが、これに限定されず、その他の標識灯或いは前照灯にも適用可能である。また、アウタレンズ１２は、表裏両面には、シリンドリカル状のプリズムＰ１、Ｐ２が形成されているが、このアウタレンズ１２とは別に、色付きのインナレンズを、同じ灯室内に設けても良いことは勿論である。
【００２７】
また、前記アウタレンズ１２の表面のプリズムＰ１について、第４〜６ブロックＢ４〜Ｂ６の前記加工線１６、１６間における垂直断面の曲率Ｒが、７．５であるのに対し、第１〜３ブロックＢ１〜Ｂ３及び第７〜９ブロックＢ７〜Ｂ９の前記加工線１６、１６間における垂直断面の曲率Ｒが、９．０であるとして説明したが、これに限定されるものではなく、第１〜９ブロックＢ１〜Ｂ９の全ての垂直断面の曲率Ｒを９．０或いは７．５といった一定の曲率Ｒに統一しても良い。
【００２８】
【発明の効果】
この発明によれば、加工線が斜めに連続することで、外光からの光は斜めなりに光を拡散して見栄えのアクセントが生じることになり、見栄え上新規な灯具とすることができる。また、アウタレンズの表裏のプリズムが、垂直及び水平の単純な曲面としたことで、光源及び光源から反射した光は、水平及び垂直に拡散し、無理なく所望の測定ポイントに光が届くことになり、配光を成立させることができる。
【図面の簡単な説明】
【図１】この発明の一実施形態に係る車両用灯具としての自動車搭載灯具を示す斜視図。
【図２】図１中矢示ＳＡ−ＳＡ線に沿う断面図。
【図３】図２のアウタレンズを示す正面図。
【図４】図４の矢示ＳＢ−ＳＢ線に沿うアウタレンズのプリズムを示す拡大断面図。
【符号の説明】
３ 「灯具」であるフロントターンシグナルランプ
１０ 光源
１１ 「灯室」であるハウジング
１２ アウタレンズ
１６，１７ 加工線
Ｐ１，Ｐ２ シリンドリカル状のプリズム[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicular lamp used for a front turn signal lamp or the like.
[0002]
[Prior art]
The lens of the vehicular lamp is provided with a lattice prism processing or a polyhedral cylindrical prism so that the light from the light source is uniformly distributed in the horizontal direction and the vertical direction.
[0003]
[Problems to be solved by the invention]
However, in such a conventional technique, there is a tendency that the appearance of a uniform light distribution pattern is lacking in appearance, and when a cylindrical prism is formed in an oblique direction, it is usually perpendicular to the prism processing line. In order to process a prism with a simple curved surface, the light reflected from the light source is diffused along the prism processing line, that is, in an oblique direction, and the light distribution pattern is also inclined, so that the light does not reach the necessary place. There is a fear. In addition, when the lens basic surface has a wave-like shape, if you try to process the lattice prism on the front or back surface, depending on the part, you can obtain the desired prism curved surface in order to avoid undercut due to mold processing. It may also become thin.
[0004]
The present invention has been made by paying attention to such a conventional technique, and provides a vehicular lamp that has a good light distribution even when an oblique prism is used and that is attractive in appearance.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 includes at least a lamp chamber having a built-in light source and having a reflecting surface capable of reflecting light from the light source on the opening side, and an outer lens covering the front side of the lamp chamber in the vehicle. A lens basic surface, a prism formed by a cylindrical surface projecting from the lens basic surface, and the lens basic surface and the cylindrical surface. A processing line formed by continuously forming intersections with the surface formed by the step is formed, and the processing line formed on the surface of the outer lens and the processing line formed on the back surface of the outer lens are viewed from the front. None the exchange Sajo by being formed in an oblique line with respect to the vertical direction as seen, the prism formed on the surface of the outer lens is vertical section of the prism An arc of curvature of the surface formed by Oite the cylindrical constant, the prism formed on the back surface of the outer lens is an arc of the curvature of the surface formed by said cylindrical in horizontal cross-section with the prisms is constant It is .
[0006]
According to the first aspect of the present invention, when the processing lines are obliquely intersected and continuous, it looks like a substantially rhombus, and the light from the outside light diffuses the light obliquely, resulting in a nice accent. It can be made into a new lighting fixture. Further, the prism formed on the front surface of the outer lens is an arc of curvature of the surface formed by the cylindrical in a vertical section of the prism is fixed, a prism formed on the back surface of the outer lens is a said prism By assuming that the curvature of the arc of the surface formed by cylindrical in the horizontal cross section is constant, light reaches a desired measurement point, and light distribution can be established.
[0007]
The invention according to claim 2 includes at least a lamp chamber having a built-in light source and having a reflecting surface capable of reflecting light from the light source on the opening side, and an outer lens covering the front side of the lamp chamber in the vehicle. A lens basic surface, a prism formed by a cylindrical surface projecting from the lens basic surface, and the lens basic surface and the cylindrical surface. A processing line formed by continuously forming intersections with the surface formed by the step is formed, and the processing line formed on the surface of the outer lens and the processing line formed on the back surface of the outer lens are viewed from the front. None the exchange Sajo by being formed in an oblique line with respect to the vertical direction as seen, the prism formed on the surface of the outer lens is horizontal section of the prism An arc of curvature of the surface formed by Oite the cylindrical constant, the prism formed on the back surface of the outer lens is an arc of the curvature of the surface formed by said cylindrical in vertical section of the prism is constant It is .
[0008]
According to the second aspect of the present invention, when the processing lines are obliquely intersected and continuous, it looks like a substantially rhombus, and the light from the outside light diffuses the light obliquely to produce an attractive accent. It can be made into a new lighting fixture. Further, vertical prisms formed on the front surface of the outer lens, an arc of curvature of the surface formed by the cylindrical in horizontal cross-section with the prisms is constant, prisms formed on the rear surface of the outer lens is with the prism By assuming that the curvature of the arc of the surface formed by cylindrical in the cross section is constant, light reaches a desired measurement point, and light distribution can be established.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described below with reference to FIGS.
[0010]
FIG. 1 shows an automobile 1 which includes a headlamp 2 and a front turn signal lamp 3 which is a “lamp”. Reference numeral 4 denotes a front grill.
[0011]
The front turn signal lamp 3 includes a housing 11 that is a “lamp chamber” in which a light source 10 is inserted and incorporated, and an outer lens 12 that covers an opening on the vehicle front side of the housing 11 and has a substantially inclined shape. Thus, the opening of the housing 11 and the end of the outer lens 12 are fixed by a gray adhesive 15 by hot melt. The inner surface of the housing 11 is a paraboloidal reflecting surface by aluminum vapor deposition.
[0012]
The cross-sectional shape of the outer lens 12 is formed in a wavy shape with a substantially vertical surface and a surface facing upward, and is colored amber.
[0013]
As shown in FIGS. 3 and 4, the outer lens 12 has cylindrical prisms P <b> 1 and P <b> 2 formed on both front and back surfaces. In the surface prism P1, the processing line 16 in which the intersection of the lens basic surface and the surface formed by the cylinder is continuously formed is a slope from the lower left to the upper right when viewed from the surface side, and its angle is perpendicular to It is 47.5 degrees. The prism P2 on the back surface side (the light source 10 side) has a processing line 17 in which the intersection of the lens basic surface and the surface formed by the cylindrical is continuously formed on the slope from the lower left to the upper right when viewed from the back surface side. The angle is 45 degrees with respect to the vertical. Therefore, when the outer lens 12 is viewed from the front, the prisms P1 and P2 have a lattice shape.
[0014]
The prisms P1 and P2 form nine blocks, upper, middle and lower (see FIG. 3). Located at the center 10a of the light source 10 is the fifth block B5, which is 25 millimeters on the left and right center side of the automobile 1 with respect to the center 10a of the light source 10, and 20 millimeters on the end side of the automobile 1 and also on the upper side. 15 mm, and the lower side is surrounded by 20 mm. The second block B2 and the eighth block B8 have the same left-right width as the fifth block B5, and are arranged above and below the fifth block B5, respectively. Further, the fourth to sixth blocks B4 to 6 at the center in the vertical direction have the same vertical width as that of the fifth block B5, and are respectively arranged on the left and right of the fifth block B5. The first, third, seventh, and ninth blocks B1, 3, 7, and 9 are arranged at the remaining positions.
[0015]
In the prism P1 on the surface, the curvature R of the vertical section between the processing lines 16 and 16 of the fourth to sixth blocks B4 to B6 is 7.5, whereas the first to third blocks B1 to B3 and The curvature R of the vertical section between the processing lines 16 and 16 of the 7 to 9 blocks B7 to B9 is 9.0, and the first to third blocks B1 to B3 and the seventh to ninth blocks B7 to B9 and the fourth The curvature R is gradually changed at the boundary with the 6 blocks B4 to B6. The distance along the surface of the processing lines 16, 16 is 4 millimeters.
[0016]
In the prism P2 on the back surface, the curvature R of the horizontal section between the processing lines 17 and 17 of the fourth to sixth blocks B4 to B6 is 7.5, whereas the first to third blocks B1 to B3 and The curvature R of the horizontal section between the processing lines 17 and 17 of the 7 to 9 blocks B7 to B9 is 9.0, and the first to third blocks B1 to B3 and the seventh to ninth blocks B7 to B9 and the fourth The curvature R is gradually changed at the boundary with the 6 blocks B4 to B6. The distance along the surface of the processing lines 17, 17 is 4 millimeters.
[0017]
The prism P1. The relationship between the thicknesses of P2 is obtained by the following equation.
[Expression 1]

As shown in FIG. 4, h is a thickness, d is a vertical pitch, and R is a curvature, as shown in FIG.
[0018]
Thus, for example, in the case of the first block B1, the surface side is 5.425 when the vertical pitch d divides the distance of 4 millimeters along the surface by the sign 47.5 degrees,
The thickness h, which is the height of the prism, is 0.42 millimeters according to ## EQU1 ## On the back side, the vertical pitch d is 5.657 when the distance of 4 millimeters along the surface is divided by the sine of 45 degrees, and the thickness h, which is the prism height, is 0. 456 millimeters.
[0019]
Thus, since the light from the light source 10 is diffused as the curvature R of the prisms P1 and P2 is smaller, the fourth to sixth blocks B4 to B6 are the first to third blocks B1 to B3 and the seventh to ninth blocks B7. The diffusion of light is larger than that of .about.B9, and the diffusion of the first to third blocks B1 to B3 and the seventh to ninth blocks B7 to B9 arranged on the outside is reduced to balance the light distribution.
[0020]
In this way, the processing lines 16 and 17 are obliquely continuous, so that the light from the light source 10 is diffused obliquely to produce an attractive appearance, and a new lighting device can be obtained. Further, since the prisms P1 and P2 on the front and back sides of the outer lens 12 are formed as simple vertical and horizontal curved surfaces, light reaches the measurement point, and light distribution can be established. In addition, the outer lens 12 can exhibit a unique compound-eye effect with the prisms P1 and P2.
[0021]
In this embodiment, since the outer lens 12 has a wavy cross-sectional shape, the strength of the outer lens 12 itself increases and external light can be diffusely reflected. A feeling can be heightened. Moreover, if the said front turn signal lamp 3 is distribute | arranged to the edge of a vehicle by this, the left-right width | variety of a vehicle can be confirmed with a pedestrian etc., and it contributes by the safety | security of a pedestrian etc.
[0022]
Further, since the outer lens 12 is colored, the presence of the front turn signal lamp 3 is further increased by a guardian or the like.
[0023]
Since the prisms P1 and P2 on the front and back sides of the outer lens 12 are formed so as to cross each other, the image of the light source 10 is aligned in a lattice shape and looks good.
[0024]
Since the outer lens 12 of this embodiment has prisms P1 and P2 formed on both the front and back surfaces thereof, when the light source 10 is not lit, it looks like a rainbow color due to irregular reflection of external light, and it looks good when not lit. .
[0025]
Further, the pitches of the prisms P1 and P2 on the front and back sides are not limited to the same pitch, and may be different pitches or different pitches. Moreover, you may change the angle of the process lines 16 and 17 variously. By changing the pitch or changing the angles of the processing lines 16 and 17 in this way, the size of the light source appears to change, which is a nice accent.
[0026]
In the above embodiment, the front turn signal lamp 3 is taken as an example of a lamp to which the present invention is applied. However, the present invention is not limited to this and can be applied to other marker lamps or headlamps. The outer lens 12 has cylindrical prisms P1 and P2 formed on both the front and back surfaces, but a colored inner lens may be provided in the same lamp chamber separately from the outer lens 12. is there.
[0027]
Further, regarding the prism P1 on the surface of the outer lens 12, the curvature R of the vertical section between the processing lines 16 and 16 of the fourth to sixth blocks B4 to B6 is 7.5, whereas the first to third blocks Although the curvature R of the vertical cross section between the said process lines 16 and 16 of B1-B3 and the 7th-9th blocks B7-B9 was demonstrated as 9.0, it is not limited to this, 1st-1st The curvature R of all vertical sections of the nine blocks B1 to B9 may be unified to a constant curvature R such as 9.0 or 7.5.
[0028]
【The invention's effect】
According to the present invention, since the processing lines are obliquely continued, the light from outside light diffuses in an oblique manner to produce an attractive accent, and it is possible to obtain a new lamp that looks good. In addition, the prisms on the front and back of the outer lens have a simple vertical and horizontal curved surface, so that the light reflected from the light source and the light source diffuses horizontally and vertically, and the light reaches the desired measurement point without difficulty. The light distribution can be established.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a vehicle-mounted lamp as a vehicle lamp according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line SA-SA shown in FIG.
FIG. 3 is a front view showing the outer lens of FIG. 2;
4 is an enlarged cross-sectional view showing a prism of an outer lens along the arrow SB-SB line in FIG. 4;
[Explanation of symbols]
3 Front turn signal lamp 10 which is a “lamp” Light source 11 Housing 12 which is a “lamp chamber” Outer lenses 16, 17 Processing lines P 1, P 2 Cylindrical prisms

Claims (2)

A vehicular lamp comprising at least a lamp chamber including a light source and having a reflection surface capable of reflecting light from the light source on an opening side, and an outer lens covering the vehicle front side of the lamp chamber,
Each of the front and back surfaces of the outer lens has a lens basic surface, a prism having a surface formed by a cylindrical projection projecting from the lens basic surface, and an intersection of the lens basic surface and the surface formed by the cylindrical. A processing line formed continuously is formed,
Wherein the said processing line formed on the surface of the outer lens and the processing line formed on the back surface of the outer lens, without the exchange Sajo by being formed in an oblique line with respect to the vertical direction as viewed from the front ,
The prism formed on the surface of the outer lens has a constant curvature of an arc of a surface formed by the cylindrical in a vertical cross section of the prism ,
The vehicular lamp characterized in that the prism formed on the back surface of the outer lens has a constant curvature of an arc of a surface formed by the cylindrical in a horizontal section of the prism . A vehicular lamp comprising at least a lamp chamber including a light source and having a reflection surface capable of reflecting light from the light source on an opening side, and an outer lens covering the vehicle front side of the lamp chamber,
Each of the front and back surfaces of the outer lens has a lens basic surface, a prism having a surface formed by a cylindrical projection projecting from the lens basic surface, and an intersection of the lens basic surface and the surface formed by the cylindrical. A processing line formed continuously is formed,
Wherein the said processing line formed on the surface of the outer lens and the processing line formed on the back surface of the outer lens, without the exchange Sajo by being formed in an oblique line with respect to the vertical direction as viewed from the front ,
The prism formed on the surface of the outer lens has a constant curvature of the arc of the surface formed by the cylindrical in a horizontal cross section of the prism ,
The vehicular lamp characterized in that the prism formed on the back surface of the outer lens has a constant curvature of an arc of a surface formed by the cylindrical in a vertical cross section of the prism .

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