JP6245959B2 - Lamp - Google Patents

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JP6245959B2
JP6245959B2 JP2013241523A JP2013241523A JP6245959B2 JP 6245959 B2 JP6245959 B2 JP 6245959B2 JP 2013241523 A JP2013241523 A JP 2013241523A JP 2013241523 A JP2013241523 A JP 2013241523A JP 6245959 B2 JP6245959 B2 JP 6245959B2
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light
light guide
reflection
reflective
incident
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JP2015103328A (en
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学 矢田部
学 矢田部
直道 井手
直道 井手
作刀志 四方
作刀志 四方
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Stanley Electric Co Ltd
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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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout thereof
    • F21S43/315—Optical layout thereof using total internal reflection

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

本発明は、導光体を発光させる灯具に関する。   The present invention relates to a lamp that emits light from a light guide.

従来、例えば車両用などの各種の灯具として、光源からの光によって導光体を発光させるものが知られている（例えば、特許文献１，２参照）。このような灯具では、一般に、光源からの光を側端部から導光体内に入射させた後に、当該導光体内を導光させつつ後面で前方へ反射させて前面から出射させることにより、この導光体の前面を発光させている。   2. Description of the Related Art Conventionally, as various lamps for vehicles, for example, a lamp that emits light from a light source is known (see, for example, Patent Documents 1 and 2). In such a lamp, in general, after light from a light source is incident on the light guide body from the side end portion, the light is guided in the light guide body while being reflected forward on the rear surface and emitted from the front surface. The front surface of the light guide is made to emit light.

特開２０１１−１９８５３６号公報JP 2011-198536 A 特開２０１１−２１６２７９号公報JP 2011-216279 A

しかしながら、上記従来の灯具では、非点灯時の見栄えが、透明な導光体の前面を露出させた代わり映えのしないものであり、この前面が明らかに発光部と分かるものであった。つまり、導光体のうち非点灯時に明らかに発光部と分かる透明な前面が単純に発光しており、その発光態様は斬新性に乏しいものであった。   However, in the above-mentioned conventional lamp, the appearance when it is not lit does not appear instead of exposing the front surface of the transparent light guide, and this front surface can clearly be seen as the light emitting portion. In other words, the transparent front surface clearly known as the light emitting portion when the light guide is not turned on simply emits light, and the light emission mode is poor in novelty.

本発明は、上記課題を鑑みてなされたもので、斬新な発光態様で導光体を発光させることができる灯具の提供を目的とする。   The present invention has been made in view of the above problems, and an object thereof is to provide a lamp capable of causing a light guide to emit light in a novel light emission mode.

上記目的を達成するために、請求項１に記載の発明は、
光源と、当該光源から出射された光を導光させつつ発光する導光体とを備える灯具であって、
前記導光体は、
当該導光体の後面に設けられ、前記光源からの前方への光を当該導光体内に入射させる入射面と、
当該導光体の前面のうち前記入射面の前方に位置する部分に金属反射膜が被膜されて構成され、前記入射面から当該導光体内に入射した光を、前後方向と略直交する直交方向における一方側の反射方向へ内部反射させる前部反射面と、
当該導光体の後面のうち前記前部反射面の前記反射方向に位置する部分に金属反射膜が被膜されて構成され、前記前部反射面で内部反射された光を前方へ内部反射させる後部反射面と、
当該導光体の前面のうち前記後部反射面の前方に位置する部分に設けられ、前記後部反射面で内部反射された光を前方へ出射させる出射面と、
を有するとともに、
前面の前記前部反射面と後面の前記後部反射面とが、正面視で前記直交方向に部分的に重なっており、
前記導光体は、当該導光体の前面のうち、前記前部反射面と前記出射面との間の位置に、当該前部反射面及び当該出射面と連なりつつ、前記前部反射面よりも透過率の高い金属反射膜が被膜されて構成され、前記入射面又は前記後部反射面からの光のうち、一部を前方へ透過させつつ残りを前記反射方向へ内部反射させる第二前部反射面を有することを特徴とする。
請求項２に記載の発明は、
光源と、当該光源から出射された光を導光させつつ発光する導光体とを備える灯具であって、
前記導光体は、
当該導光体の後面に設けられ、前記光源からの前方への光を当該導光体内に入射させる入射面と、
当該導光体の前面のうち前記入射面の前方に位置する部分に金属反射膜が被膜されて構成され、前記入射面から当該導光体内に入射した光を、前後方向と略直交する直交方向における一方側の反射方向へ内部反射させる前部反射面と、
当該導光体の後面のうち前記前部反射面の前記反射方向に位置する部分に金属反射膜が被膜されて構成され、前記前部反射面で内部反射された光を前方へ内部反射させる後部反射面と、
当該導光体の前面のうち前記後部反射面の前方に位置する部分に設けられ、前記後部反射面で内部反射された光を前方へ出射させる出射面と、
を有するとともに、
当該導光体の前面のうち、前記前部反射面と前記出射面との間の位置であって、正面視で前記後部反射面と対応する領域の一部に、前記入射面又は前記後部反射面からの光のうち、前記前部反射面から前方への透過光よりも多い一部の光を前方へ透過させつつ残りを前記反射方向へ内部反射させる他の第二前部反射面を有することを特徴とする。 In order to achieve the above object, the invention described in claim 1
A lamp comprising a light source and a light guide that emits light while guiding light emitted from the light source,
The light guide is
An incident surface that is provided on the rear surface of the light guide, and allows light forward from the light source to enter the light guide;
A portion of the front surface of the light guide that is positioned in front of the incident surface is coated with a metal reflective film, and light that has entered the light guide from the incident surface is orthogonal to the front-rear direction. A front reflection surface for internal reflection in the reflection direction on one side of
A rear portion of the rear surface of the light guide that is configured by coating a portion of the front reflective surface located in the reflection direction with a metal reflective film, and internally reflects light internally reflected by the front reflective surface. A reflective surface;
An exit surface that is provided in a portion of the front surface of the light guide that is located in front of the rear reflective surface and emits light internally reflected by the rear reflective surface;
And having
The front reflective surface on the front surface and the rear reflective surface on the rear surface partially overlap in the orthogonal direction in a front view ,
The light guide is connected to the front reflection surface and the emission surface at a position between the front reflection surface and the emission surface of the front surface of the light guide, and from the front reflection surface. A second front portion that is formed by coating a metal reflective film having a high transmittance, and transmits a part of the light from the incident surface or the rear reflective surface forward and reflects the remainder in the reflection direction. It has a reflective surface .
The invention described in claim 2
A lamp comprising a light source and a light guide that emits light while guiding light emitted from the light source,
The light guide is
An incident surface that is provided on the rear surface of the light guide, and allows light forward from the light source to enter the light guide;
A portion of the front surface of the light guide that is positioned in front of the incident surface is coated with a metal reflective film, and light that has entered the light guide from the incident surface is orthogonal to the front-rear direction. A front reflection surface for internal reflection in the reflection direction on one side of
A rear portion of the rear surface of the light guide that is configured by coating a portion of the front reflective surface located in the reflection direction with a metal reflective film, and internally reflects light internally reflected by the front reflective surface. A reflective surface;
An exit surface that is provided in a portion of the front surface of the light guide that is located in front of the rear reflective surface and emits light internally reflected by the rear reflective surface;
And having
Of the front surface of the light guide, a position between the front reflection surface and the emission surface, and a part of a region corresponding to the rear reflection surface in a front view, the incident surface or the rear reflection Among the light from the surface, there is another second front reflection surface that transmits a part of the light more forward than the transmission light forward from the front reflection surface and internally reflects the remainder in the reflection direction. It is characterized by that.

請求項３に記載の発明は、請求項１又は２に記載の灯具において、
前記導光体の前記入射面の後方に配置され、前記光源からの光を導光させつつ前記入射面に向けて出射させる他の導光体を備え、
前記光源は、前記他の導光体のうち、前後方向及び前記直交方向の何れとも略直交する第二直交方向の端面に対向配置され、
前記他の導光体の後面には、前記光源から出射されて前記端面から当該他の導光体内に入射した光を前方へ反射させる複数のレンズカットが形成されていることを特徴とする。 The invention according to claim 3 is the lamp according to claim 1 or 2 ,
Another light guide that is disposed behind the incident surface of the light guide and emits the light from the light source toward the incident surface while guiding light;
The light source is disposed opposite to an end surface in a second orthogonal direction substantially orthogonal to both the front-rear direction and the orthogonal direction among the other light guides,
The rear surface of the other light guide is formed with a plurality of lens cuts that reflect light emitted from the light source and incident on the other light guide from the end surface to the front.

請求項４に記載の発明は、請求項３に記載の灯具において、
前記導光体と前記他の導光体とは、前後方向に隙間を介在させて配置されるとともに前記第二直交方向の両端で連結された状態で、互いに一体成形されていることを特徴とする。 The invention according to claim 4 is the lamp according to claim 3 ,
The light guide and the other light guide are arranged with a gap in the front-rear direction and are integrally formed with each other in a state of being connected at both ends in the second orthogonal direction. To do.

請求項１に記載の発明によれば、光源を発光させていない非点灯時には、前方から見たときに、導光体のうち、前面の前部反射面と、前面の出射面を透して後面の後部反射面とが視認される。そして、これら前面の前部反射面と後面の後部反射面とは、何れも金属反射膜が被膜されているとともに、正面視で前後方向と直交する直交方向（例えば上下方向）に部分的に重なっている。そのため、当該灯具を非点灯時に前方から見たときには、導光体の前面があたかも全面に亘って金属光沢を有している見栄えで視認される。
また、光源を発光させた点灯時には、この光源から出射されて入射面から前方向きに導光体内に入射した光が、前面の前部反射面で直交方向の一方側へ内部反射された後に、後面の後部反射面によって前方へ内部反射されて前面の出射面から出射することにより、当該出射面が発光する。したがって、この点灯時には、導光体のうち後面の後部反射面の前方に位置する出射面が発光するため、非点灯時に金属光沢を有する見栄えで視認された部分が発光することとなる。
よって、透明な導光体の前面を単純に発光させていた従来と異なり、斬新な発光態様で導光体を発光させることができる。
また、導光体は、その前面のうち、前部反射面と出射面との間の位置に、当該前部反射面及び当該出射面と連なりつつ、前部反射面よりも透過率の高い金属反射膜が被膜されて構成された第二前部反射面を有している。したがって、点灯時には、入射する光のほぼ全てが透過する出射面と、入射する光の一部だけが透過する第二前部反射面とが連なって発光するグラデーションの発光態様となり、より斬新な発光態様で導光体を発光させることができる。 According to the first aspect of the present invention, when the light source is not lit, when not lit, when viewed from the front, the light guide passes through the front front reflection surface and the front emission surface. The rear reflection surface on the rear surface is visible. Each of the front reflection surface and the rear reflection surface of the front surface is coated with a metal reflection film, and partially overlaps in an orthogonal direction (for example, the vertical direction) orthogonal to the front-rear direction when viewed from the front. ing. Therefore, when the lamp is viewed from the front when not lit, the front surface of the light guide is visually recognized as if it has a metallic luster over the entire surface.
In addition, when the light source is turned on, the light emitted from the light source and entering the light guide body forward from the incident surface is internally reflected to one side in the orthogonal direction by the front reflection surface of the front surface. By being internally reflected forward by the rear reflection surface of the rear surface and emitted from the front emission surface, the emission surface emits light. Therefore, at the time of lighting, the exit surface located in front of the rear reflection surface of the rear surface of the light guide emits light, so that a portion visually recognized with a metallic luster emits light when not turned on.
Therefore, unlike the conventional case where the front surface of the transparent light guide is simply made to emit light, the light guide can be made to emit light in a novel light emission mode.
Further, the light guide body is a metal having a higher transmittance than the front reflection surface while being connected to the front reflection surface and the emission surface at a position between the front reflection surface and the emission surface of the front surface. It has the 2nd front part reflective surface constituted by coating a reflective film. Therefore, at the time of lighting, it becomes a gradation light emission mode in which the emission surface through which almost all of the incident light is transmitted and the second front reflection surface through which only a part of the incident light is transmitted are emitted in a gradation. The light guide can be made to emit light in the embodiment.

請求項４に記載の発明によれば、光源からの光を導光体に向けて出射させる他の導光体と、この他の導光体からの光によって発光する導光体とが、前後方向に隙間を介在させて配置されるとともに、前後方向及び直交方向の何れとも略直交する第二直交方向（例えば左右方向）の両端で連結された状態で、互いに一体成形されている。したがって、これら導光体及び他の導光体を別体で設ける場合に比べ、部品点数や組立工数を低減させることができる。 According to the fourth aspect of the present invention, the other light guide that emits the light from the light source toward the light guide and the light guide that emits light by the light from the other light guide are front and rear. They are disposed with a gap in the direction, and are integrally formed with each other in a state where they are connected at both ends in a second orthogonal direction (for example, the left-right direction) substantially orthogonal to both the front-rear direction and the orthogonal direction. Therefore, compared with the case where these light guides and other light guides are provided separately, the number of parts and the number of assembly steps can be reduced.

実施形態における灯具の正面図である。It is a front view of the lamp in embodiment. 実施形態における灯具の要部の平面図である。It is a top view of the principal part of the lamp in embodiment. 図１のIII−III線での断面図である。It is sectional drawing in the III-III line of FIG. 実施形態における灯具の変形例を説明するための側断面図である。It is a sectional side view for demonstrating the modification of the lamp in embodiment.

以下、本発明の実施形態について、図面を参照して説明する。
図１は、本実施形態における灯具１の正面図であり、図２は、灯具１の要部の平面図であり、図３は、図１のIII−III線での断面図である。
なお、以下の説明では、「前」「後」「左」「右」「上」「下」との記載は、特に断りのない限り、灯具１から見た方向を意味するものとする。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a lamp 1 according to the present embodiment, FIG. 2 is a plan view of a main part of the lamp 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG.
In the following description, “front”, “rear”, “left”, “right”, “upper”, and “lower” refer to directions viewed from the lamp 1 unless otherwise specified.

図１及び図２に示すように、灯具１は、２つのＬＥＤ（発光ダイオード）２，２と、導光レンズ３とを備えている。これら２つのＬＥＤ２，２及び導光レンズ３は、導光レンズ３（後述の第二導光部３２）の前面を前方に露出させた状態で、ハウジング４に保持されている。   As shown in FIGS. 1 and 2, the lamp 1 includes two LEDs (light emitting diodes) 2 and 2 and a light guide lens 3. These two LEDs 2 and 2 and the light guide lens 3 are held by the housing 4 with the front surface of the light guide lens 3 (second light guide portion 32 described later) exposed forward.

２つのＬＥＤ２，２は、灯具１の光源であり、後述するように、導光レンズ３の第一導光部３１の両端面３１ａ，３１ａに発光面を対向させた状態に配置されている。   The two LEDs 2 and 2 are light sources of the lamp 1 and are disposed in a state where the light emitting surfaces are opposed to both end surfaces 31a and 31a of the first light guide portion 31 of the light guide lens 3, as will be described later.

導光レンズ３は、２つのＬＥＤ２，２から出射された光を導光させつつ当該光によって発光するものであり、無色透明の導光材料を基体としている。この導光レンズ３は、２つのＬＥＤ２，２からの光を長手方向に広げつつ出射させる第一導光部３１と、この第一導光部３１からの光によって発光する第二導光部３２とを備えて構成されている。   The light guide lens 3 emits light emitted from the two LEDs 2 and 2 while guiding the light, and has a colorless and transparent light guide material as a base. The light guide lens 3 includes a first light guide portion 31 that emits light from the two LEDs 2 and 2 while spreading the light in the longitudinal direction, and a second light guide portion 32 that emits light by the light from the first light guide portion 31. And is configured.

このうち、第一導光部３１は、長手方向に沿って後方へやや湾曲した断面略矩形状の長尺な棒状に形成され、正面視で左上がりにやや傾斜するとともに平面視で左斜め後方へ傾斜した状態に配置されている。この第一導光部３１のうち、左右方向の両端面３１ａ，３１ａは、２つのＬＥＤ２，２と対向しており、これら２つのＬＥＤ２，２から出射された光を当該第一導光部３１内に入射させる入射面となっている。また、第一導光部３１のうち、長手方向に沿った後面３１ｂには、図示しない複数のレンズカットが長手方向に沿って略全面に亘って形成されている。そのため、２つのＬＥＤ２，２から出射されて両端面３１ａから第一導光部３１（導光レンズ３）内に入射した光は、当該第一導光部３１内を長手方向に沿って導光しつつ後面３１ｂのレンズカットで前方へ反射されて、当該第一導光部３１の前面３１ｃから前方へ出射する。   Among these, the 1st light guide part 31 is formed in the elongate rod shape of the cross-sectional substantially rectangular shape curved slightly backward along the longitudinal direction, and it inclines a little to the left upwards in front view, and diagonally left back in planar view It is arranged in an inclined state. In the first light guide 31, both end surfaces 31 a and 31 a in the left-right direction are opposed to the two LEDs 2 and 2, and light emitted from the two LEDs 2 and 2 is transmitted to the first light guide 31. It is an incident surface that enters the inside. Further, in the first light guide portion 31, a plurality of lens cuts (not shown) are formed on the rear surface 31b along the longitudinal direction over substantially the entire surface along the longitudinal direction. Therefore, the light emitted from the two LEDs 2 and 2 and incident on the first light guide portion 31 (light guide lens 3) from both end surfaces 31a is guided along the longitudinal direction in the first light guide portion 31. While being reflected forward by the lens cut of the rear surface 31b, the light is emitted forward from the front surface 31c of the first light guide portion 31.

第二導光部３２は、第一導光部３１と同様に、長手方向に沿って後方へやや湾曲した長尺な形状に形成され、正面視で左上がりにやや傾斜するとともに平面視で左斜め後方へ傾斜した状態で、第一導光部３１の前方に配置されている。この第二導光部３２は、図３に示すように、左右方向と直交する断面形状が略一様なものとなっており、第一導光部３１と上端の位置が一致している。   Similar to the first light guide 31, the second light guide 32 is formed in a long shape slightly curved backward along the longitudinal direction, and is slightly inclined to the left in front view and left in plan view. It is arranged in front of the first light guide section 31 in a state inclined obliquely rearward. As shown in FIG. 3, the second light guide portion 32 has a substantially uniform cross-sectional shape orthogonal to the left-right direction, and the first light guide portion 31 and the upper end position coincide with each other.

第二導光部３２の後面は、第一導光部３１から出射された光を当該第二導光部３２内に入射させる入射面３２ａと、当該第二導光部３２内に入射して後述の前部反射面３２ｃで内部反射された光をさらに内部反射させる後部反射面３２ｂとを有している。
入射面３２ａは、第二導光部３２の後面のうちの上部に形成されており、第一導光部３１の前面３１ｃとの間に隙間を介在させつつ当該前面３１ｃと正対している。この入射面３２ａは、第一導光部３１から前方へ出射された光をそのまま第二導光部３２内に入射させる。
後部反射面３２ｂは、第二導光部３２の後面のうち入射面３２ａよりも下側の部分（図３に太線で示す部分）に、側面視で前下がりに傾斜しつつ後方へ膨らむ湾曲面状に形成されている。この後部反射面３２ｂは、金属光沢を有する金属反射膜として透過率がほぼ０％のアルミニウム皮膜が蒸着されているとともに、後述の前部反射面３２ｃの下方に位置しており、当該前部反射面３２ｃで内部反射された光を前方へさらに内部反射させる。 The rear surface of the second light guide part 32 is incident on the incident surface 32 a for allowing the light emitted from the first light guide part 31 to enter the second light guide part 32 and the second light guide part 32. And a rear reflection surface 32b that further internally reflects light internally reflected by a front reflection surface 32c described later.
The incident surface 32a is formed in the upper part of the rear surface of the second light guide 32, and faces the front surface 31c with a gap between the front surface 31c of the first light guide 31 and the front surface 31c. The incident surface 32a allows light emitted forward from the first light guide 31 to enter the second light guide 32 as it is.
The rear reflecting surface 32b is a curved surface that swells rearward while inclining forward in a side view in a portion (a portion indicated by a thick line in FIG. 3) below the incident surface 32a of the rear surface of the second light guide portion 32. It is formed in a shape. The rear reflective surface 32b is deposited with an aluminum film having a transmittance of approximately 0% as a metallic reflective film having a metallic luster, and is positioned below a front reflective surface 32c described later. The light internally reflected by the surface 32c is further internally reflected forward.

第二導光部３２の前面は、ハウジング４から前方に露出しており、側面視で前下がりに傾斜しつつ前方へ膨らむ湾曲面状に形成されて、当該第二導光部３２の後面と下端で繋がっている。
この第二導光部３２の前面のうち、入射面３２ａの前方に位置する上側部分（図３に太線で示す部分）は、入射面３２ａから第二導光部３２内に入射した光を下方へ内部反射させる前部反射面３２ｃとなっており、金属光沢を有する金属反射膜として透過率がほぼ０％のアルミニウム皮膜が蒸着されている。また、前部反射面３２ｃは、第二導光部３２の後面の後部反射面３２ｂと、正面視で上下方向に部分的に重なっている。つまり、左右方向と直交する各断面において、前部反射面３２ｃの下端が後部反射面３２ｂの上端よりも下側に位置している。
また、第二導光部３２の前面のうち、前部反射面３２ｃよりも下側の部分は、アルミニウム皮膜などの金属反射膜が被膜されておらず、第二導光部３２内から前方へ光を出射させる出射面３２ｄとなっている。この出射面３２ｄは、後部反射面３２ｂの前方に位置しており、当該後部反射面３２ｂで前方へ内部反射された光を第二導光部３２内から出射させる。 The front surface of the second light guide 32 is exposed forward from the housing 4 and is formed in a curved surface shape that swells forward while inclining forward in a side view, and the rear surface of the second light guide 32. Connected at the bottom.
Of the front surface of the second light guide portion 32, the upper portion (the portion indicated by a thick line in FIG. 3) located in front of the incident surface 32a is a lower portion of the light incident on the second light guide portion 32 from the incident surface 32a. An aluminum film having a transmittance of approximately 0% is deposited as a metallic reflective film having a metallic luster. The front reflection surface 32c partially overlaps the rear reflection surface 32b of the rear surface of the second light guide 32 in the vertical direction when viewed from the front. That is, in each cross section orthogonal to the left-right direction, the lower end of the front reflection surface 32c is located below the upper end of the rear reflection surface 32b.
Further, a portion of the front surface of the second light guide portion 32 that is lower than the front reflection surface 32c is not coated with a metal reflection film such as an aluminum coating, and forwards from the second light guide portion 32 to the front. It is an emission surface 32d for emitting light. The emission surface 32d is located in front of the rear reflection surface 32b, and emits light internally reflected forward by the rear reflection surface 32b from the second light guide portion 32.

また、第二導光部３２は、第一導光部３１との間に略全長に亘って前後方向に隙間を介在させつつ、長手方向（左右方向）の両端では第一導光部３１と連結されており（図２参照）、本実施形態では、第一導光部３１と互いに一体成形されている。   In addition, the second light guide 32 has a gap in the front-rear direction over the substantially entire length between the first light guide 31 and the first light guide 31 at both ends in the longitudinal direction (left-right direction). They are connected (see FIG. 2), and in this embodiment, are integrally formed with the first light guide portion 31.

以上の構成を具備する灯具１では、２つのＬＥＤ２，２を発光させていない非点灯時には、前方から見たときに、導光レンズ３のうちハウジング４から露出した第二導光部３２の前面が視認される。より詳しくは、第二導光部３２のうち、前面上部の前部反射面３２ｃと、この前部反射面３２ｃよりも下側部分を透して後面の後部反射面３２ｂとが視認される。そして、これら前面の前部反射面３２ｃと後面の後部反射面３２ｂとは、何れも金属光沢を有する金属反射膜（アルミニウム皮膜）が被膜されているとともに、正面視で上下方向に部分的に重なっている。そのため、当該灯具１を非点灯時に前方から見たときには、導光レンズ３（第二導光部３２）の前面が、あたかも全面に亘って金属光沢を有しているメタリックな見栄えで視認される。   In the lamp 1 having the above-described configuration, the front surface of the second light guide portion 32 exposed from the housing 4 of the light guide lens 3 when viewed from the front when the two LEDs 2 and 2 are not lit. Is visible. More specifically, in the second light guide part 32, the front reflection surface 32c at the upper part of the front surface and the rear reflection surface 32b of the rear surface through the lower part than the front reflection surface 32c are visually recognized. The front reflective surface 32c on the front surface and the rear reflective surface 32b on the rear surface are both coated with a metallic reflective film (aluminum film) having a metallic luster and partially overlap in the vertical direction when viewed from the front. ing. Therefore, when the lamp 1 is viewed from the front when not lit, the front surface of the light guide lens 3 (second light guide portion 32) is visually recognized as if it has a metallic luster over the entire surface. .

一方、２つのＬＥＤ２，２を発光させた点灯時には、この２つのＬＥＤ２，２から出射された光が、導光レンズ３の第一導光部３１の両端面３１ａ，３１ａから当該第一導光部３１内に入射してその内部を長手方向へ導光していく。そして、この光は、第一導光部３１の後面３１ｂに形成された複数のレンズカットで前方へ反射されて、当該第一導光部３１の前面３１ｃから前方へ出射される。第一導光部３１から前方へ出射された光は、第二導光部３２の後面の入射面３２ａから当該第二導光部３２内に入射した後、その前面上部の前部反射面３２ｃで下方へ内部反射される。そして、この光が、第二導光部３２の後面の後部反射面３２ｂによって前方へ内部反射されて前面の出射面３２ｄから出射することにより、当該出射面３２ｄが発光する。したがって、この点灯時には、第二導光部３２のうち後面の後部反射面３２ｂの前方に位置する出射面３２ｄが発光するため、非点灯時に金属光沢を有する見栄えで視認された部分が発光することとなる。   On the other hand, when the two LEDs 2 and 2 are turned on, the light emitted from the two LEDs 2 and 2 is transmitted from the both end surfaces 31 a and 31 a of the first light guide portion 31 of the light guide lens 3. The light enters the portion 31 and guides the inside in the longitudinal direction. Then, this light is reflected forward by a plurality of lens cuts formed on the rear surface 31 b of the first light guide 31, and is emitted forward from the front surface 31 c of the first light guide 31. The light emitted forward from the first light guide portion 31 enters the second light guide portion 32 from the incident surface 32a on the rear surface of the second light guide portion 32, and then the front reflection surface 32c on the upper front surface thereof. Is internally reflected downward. Then, this light is internally reflected forward by the rear reflection surface 32b of the rear surface of the second light guide portion 32 and emitted from the front emission surface 32d, whereby the emission surface 32d emits light. Therefore, at the time of lighting, since the emission surface 32d located in front of the rear reflection surface 32b of the rear surface of the second light guide portion 32 emits light, the portion visually recognized with a metallic luster when not lit emits light. It becomes.

以上のように、本実施形態の灯具１によれば、非点灯時には、導光レンズ３（第二導光部３２）の前面があたかも全面に亘って金属光沢を有している見栄えで視認される一方で、点灯時には、第二導光部３２のうち後面の後部反射面３２ｂの前方に位置する出射面３２ｄが発光する。したがって、この点灯時には、非点灯時に金属光沢を有する見栄えで視認された部分が発光することとなり、透明な導光体の前面を単純に発光させていた従来と異なり、斬新な発光態様で導光レンズ３（第二導光部３２）を発光させることができる。   As described above, according to the lamp 1 of the present embodiment, when not lit, the front surface of the light guide lens 3 (second light guide portion 32) is visually recognized as if it has a metallic luster over the entire surface. On the other hand, at the time of lighting, the emission surface 32d located in front of the rear reflection surface 32b of the rear surface of the second light guide portion 32 emits light. Therefore, when it is lit, the part that is visually recognized with a metallic luster when it is not lit emits light, and unlike the conventional case where the front surface of the transparent light guide is simply made to emit light, the light is guided in a novel light emission mode. The lens 3 (second light guide portion 32) can emit light.

また、第一導光部３１と第二導光部３２とが、前後方向に隙間を介在させて配置されるとともに長手方向（左右方向）の両端で連結された状態で、導光レンズ３全体として互いに一体成形されているので、これら第一導光部３１及び第二導光部３２を別体で設ける場合に比べ、部品点数や組立工数を低減させることができる。   In addition, the entire light guide lens 3 is disposed in a state in which the first light guide portion 31 and the second light guide portion 32 are disposed with a gap in the front-rear direction and are connected at both ends in the longitudinal direction (left-right direction). Since the first light guide part 31 and the second light guide part 32 are provided separately, the number of parts and the number of assembly steps can be reduced.

なお、本発明を適用可能な実施形態は、上述した実施形態に限定されることなく、本発明の趣旨を逸脱しない範囲で適宜変更可能である。   The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

例えば、上記実施形態では、第二導光部３２の前面に、透過率がほぼ０％の金属反射膜（アルミニウム皮膜）が被膜された前部反射面３２ｃと、金属反射膜が被膜されていない出射面３２ｄとが形成されていることとしたが、図４に示すように、上記実施形態における出射面３２ｄの上部を、前部反射面３２ｃよりも透過率の高い金属反射膜が被膜された第二前部反射面３２ｅとしてもよい。具体的には、この第二前部反射面３２ｅは、第二導光部３２の前面のうち前部反射面３２ｃと出射面３２ｄとの間の位置に、当該前部反射面３２ｃ及び当該出射面３２ｄと連なって形成されている。また、第二前部反射面３２ｅは、前部反射面３２ｃよりも透過率の高い（例えば透過率５０％の）アルミニウム皮膜が蒸着された、いわゆるハーフミラー面であり、入射面３２ａ又は後部反射面３２ｂから当該第二前部反射面３２ｅに入射した光のうち、一部を前方へ透過させつつ残りを下方へ内部反射させる。このような第二前部反射面３２ｅを設けることにより、灯具１の点灯時には、入射する光のほぼ全てが透過する出射面３２ｄと、入射する光の一部だけが透過する第二前部反射面３２ｅとが連なって発光するグラデーションの発光態様となり、より斬新な発光態様で導光レンズ３（第二導光部３２）を発光させることができる。   For example, in the above-described embodiment, the front reflection surface 32c in which a metal reflection film (aluminum film) having a transmittance of approximately 0% is coated on the front surface of the second light guide section 32 and the metal reflection film are not coated. As shown in FIG. 4, the upper part of the emission surface 32d in the above embodiment is coated with a metal reflection film having a higher transmittance than the front reflection surface 32c. It is good also as the 2nd front part reflective surface 32e. Specifically, the second front reflection surface 32e is located at a position between the front reflection surface 32c and the emission surface 32d in the front surface of the second light guide unit 32, and the front reflection surface 32c and the emission surface. It is formed continuously with the surface 32d. The second front reflection surface 32e is a so-called half mirror surface on which an aluminum film having a higher transmittance than the front reflection surface 32c (for example, a transmittance of 50%) is deposited, and is incident surface 32a or rear reflection. Of the light incident on the second front reflection surface 32e from the surface 32b, a part of the light is transmitted forward and the rest is internally reflected downward. By providing such a second front reflection surface 32e, when the lamp 1 is lit, an emission surface 32d through which almost all incident light is transmitted and a second front reflection through which only a part of incident light is transmitted. A gradation light emission mode in which the surface 32e is connected to emit light, and the light guide lens 3 (second light guide portion 32) can emit light in a more novel light emission mode.

１ 灯具
２ ＬＥＤ（光源）
３ 導光レンズ
３１ 第一導光部（他の導光体）
３１ａ 端面
３１ｂ 後面
３１ｃ 前面
３２ 第二導光部（導光体）
３２ａ 入射面
３２ｂ 後部反射面
３２ｃ 前部反射面
３２ｄ 出射面
３２ｅ 第二前部反射面 1 lamp 2 LED (light source)
3 Light guide lens 31 1st light guide part (other light guides)
31a End face 31b Rear face 31c Front face 32 Second light guide (light guide)
32a Incident surface 32b Rear reflective surface 32c Front reflective surface 32d Outgoing surface 32e Second front reflective surface

Claims (4)

光源と、当該光源から出射された光を導光させつつ発光する導光体とを備える灯具であって、
前記導光体は、
当該導光体の後面に設けられ、前記光源からの前方への光を当該導光体内に入射させる入射面と、
当該導光体の前面のうち前記入射面の前方に位置する部分に金属反射膜が被膜されて構成され、前記入射面から当該導光体内に入射した光を、前後方向と略直交する直交方向における一方側の反射方向へ内部反射させる前部反射面と、
当該導光体の後面のうち前記前部反射面の前記反射方向に位置する部分に金属反射膜が被膜されて構成され、前記前部反射面で内部反射された光を前方へ内部反射させる後部反射面と、
当該導光体の前面のうち前記後部反射面の前方に位置する部分に設けられ、前記後部反射面で内部反射された光を前方へ出射させる出射面と、
を有するとともに、
前面の前記前部反射面と後面の前記後部反射面とが、正面視で前記直交方向に部分的に重なっており、
前記導光体は、当該導光体の前面のうち、前記前部反射面と前記出射面との間の位置に、当該前部反射面及び当該出射面と連なりつつ、前記前部反射面よりも透過率の高い金属反射膜が被膜されて構成され、前記入射面又は前記後部反射面からの光のうち、一部を前方へ透過させつつ残りを前記反射方向へ内部反射させる第二前部反射面を有することを特徴とする灯具。 A lamp comprising a light source and a light guide that emits light while guiding light emitted from the light source,
The light guide is
An incident surface that is provided on the rear surface of the light guide, and allows light forward from the light source to enter the light guide;
A portion of the front surface of the light guide that is positioned in front of the incident surface is coated with a metal reflective film, and light that has entered the light guide from the incident surface is orthogonal to the front-rear direction. A front reflection surface for internal reflection in the reflection direction on one side of
A rear portion of the rear surface of the light guide that is configured by coating a portion of the front reflective surface located in the reflection direction with a metal reflective film, and internally reflects light internally reflected by the front reflective surface. A reflective surface;
An exit surface that is provided in a portion of the front surface of the light guide that is located in front of the rear reflective surface and emits light internally reflected by the rear reflective surface;
And having
The front reflective surface on the front surface and the rear reflective surface on the rear surface partially overlap in the orthogonal direction in a front view ,
The light guide is connected to the front reflection surface and the emission surface at a position between the front reflection surface and the emission surface of the front surface of the light guide, and from the front reflection surface. A second front portion that is formed by coating a metal reflective film having a high transmittance, and transmits a part of the light from the incident surface or the rear reflective surface forward and reflects the remainder in the reflection direction. A lamp characterized by having a reflective surface . 光源と、当該光源から出射された光を導光させつつ発光する導光体とを備える灯具であって、
前記導光体は、
当該導光体の後面に設けられ、前記光源からの前方への光を当該導光体内に入射させる入射面と、
当該導光体の前面のうち前記入射面の前方に位置する部分に金属反射膜が被膜されて構成され、前記入射面から当該導光体内に入射した光を、前後方向と略直交する直交方向における一方側の反射方向へ内部反射させる前部反射面と、
当該導光体の後面のうち前記前部反射面の前記反射方向に位置する部分に金属反射膜が被膜されて構成され、前記前部反射面で内部反射された光を前方へ内部反射させる後部反射面と、
当該導光体の前面のうち前記後部反射面の前方に位置する部分に設けられ、前記後部反射面で内部反射された光を前方へ出射させる出射面と、
を有するとともに、
当該導光体の前面のうち、前記前部反射面と前記出射面との間の位置であって、正面視で前記後部反射面と対応する領域の一部に、前記入射面又は前記後部反射面からの光のうち、前記前部反射面から前方への透過光よりも多い一部の光を前方へ透過させつつ残りを前記反射方向へ内部反射させる他の第二前部反射面を有することを特徴とする灯具。 A lamp comprising a light source and a light guide that emits light while guiding light emitted from the light source,
The light guide is
An incident surface that is provided on the rear surface of the light guide, and allows light forward from the light source to enter the light guide;
A portion of the front surface of the light guide that is positioned in front of the incident surface is coated with a metal reflective film, and light that has entered the light guide from the incident surface is orthogonal to the front-rear direction. A front reflection surface for internal reflection in the reflection direction on one side of
A rear portion of the rear surface of the light guide that is configured by coating a portion of the front reflective surface located in the reflection direction with a metal reflective film, and internally reflects light internally reflected by the front reflective surface. A reflective surface;
An exit surface that is provided in a portion of the front surface of the light guide that is located in front of the rear reflective surface and emits light internally reflected by the rear reflective surface;
And having
Of the front surface of the light guide, a position between the front reflection surface and the emission surface, and a part of a region corresponding to the rear reflection surface in a front view, the incident surface or the rear reflection Among the light from the surface, there is another second front reflection surface that transmits a part of the light more forward than the transmission light forward from the front reflection surface and internally reflects the remainder in the reflection direction. A lamp characterized by that. 前記導光体の前記入射面の後方に配置され、前記光源からの光を導光させつつ前記入射面に向けて出射させる他の導光体を備え、
前記光源は、前記他の導光体のうち、前後方向及び前記直交方向の何れとも略直交する第二直交方向の端面に対向配置され、
前記他の導光体の後面には、前記光源から出射されて前記端面から当該他の導光体内に入射した光を前方へ反射させる複数のレンズカットが形成されていることを特徴とする請求項１又は２に記載の灯具。 Another light guide that is disposed behind the incident surface of the light guide and emits the light from the light source toward the incident surface while guiding light;
The light source is disposed opposite to an end surface in a second orthogonal direction substantially orthogonal to both the front-rear direction and the orthogonal direction among the other light guides,
Wherein the rear surface of the other lightguide claims wherein a plurality of lens cut to reflect light incident from the end face is emitted from the light source to the other lightguide forward is formed Item 3. A lamp according to item 1 or 2 . 前記導光体と前記他の導光体とは、前後方向に隙間を介在させて配置されるとともに前記第二直交方向の両端で連結された状態で、互いに一体成形されていることを特徴とする請求項３に記載の灯具。 The light guide and the other light guide are arranged with a gap in the front-rear direction and are integrally formed with each other in a state of being connected at both ends in the second orthogonal direction. The lamp according to claim 3 .
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