JP2009187707A - Vehicular lighting fixture - Google Patents

Vehicular lighting fixture Download PDF

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JP2009187707A
JP2009187707A JP2008024110A JP2008024110A JP2009187707A JP 2009187707 A JP2009187707 A JP 2009187707A JP 2008024110 A JP2008024110 A JP 2008024110A JP 2008024110 A JP2008024110 A JP 2008024110A JP 2009187707 A JP2009187707 A JP 2009187707A
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heat
lens
snow
vehicular lamp
heat radiating
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Takateru Sakai
隆照 酒井
Takashi Ebitani
崇 戎谷
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Stanley Electric Co Ltd
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Stanley Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that a conventional snow melting device in a lens of a vehicular lighting fixture has a low thermal efficiency and is unable to melt the snow enough and lacks a practical performance such as securing a range of vision or the like, since heating is carried out from the inside face of a resin lens having a comparatively low thermal conductivity. <P>SOLUTION: In the vehicular lighting fixture, a light transmitting lens 4 is covered from outside of the lens by a heat conductor part 5 formed with a member having a better thermal conductivity than this light transmitting lens and formed in a shape that causes no hindrance to practical use in regard to effect on a light distribution shape and brightness, and by arranging to have these heat conductor part and a heat radiating part 3 connected, the heat of the heat radiating part can be used directly to melt the snow so as to raise the thermal efficiency, enable to melt the snow rapidly, and improve practicality. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、車両用灯具に係るものであり、詳細には、光源として照射光中に赤外線を実質的に含まないＬＥＤが採用され、このために、降雪時には、従来の白熱電球などの光源であれば点灯することによりアウターレンズの融雪も同時に行えたのに対し、融雪が不可能となり、例えば、ヒーターの付加など融雪対策が必要とされる車両用灯具の構成に関するものである。   The present invention relates to a vehicular lamp, and more specifically, an LED that does not substantially contain infrared light is used as a light source. For this reason, a light source such as a conventional incandescent bulb is used during snowfall. The present invention relates to a configuration of a vehicular lamp in which the outer lens can be melted at the same time if it is turned on, while it is impossible to melt the snow.

従来の、この種のＬＥＤを光源として採用した場合の融雪手段としては、大別して、３種類の方法が提案されている。その第一の方法としては、例えば、リア、或いは、フロント用のコンビネーションランプ９０においては、複数の灯器が組合わされるものであるので、その内の１つの灯器９１の光源として従来例通りに、点灯時には赤外線を発する白熱電球９２を採用し、前記白熱電球９２が発する赤外線により融雪を行わせようとするものであり、よって、図５に示すように、ハウジング９４内で加熱された空気が上昇気流となって、アウターレンズ９３全体に行き渡るように、白熱電球９２はＬＥＤ９５よりも下方に取付けることが好ましい実施形態となる。
特開２００６−２６９１９４号公報 Conventionally, three types of methods have been proposed as snow melting means when this type of LED is used as a light source. As the first method, for example, in the rear or front combination lamp 90, since a plurality of lamps are combined, the light source of one lamp 91 is the same as the conventional example. In addition, an incandescent bulb 92 that emits infrared rays when it is lit is used to melt snow with the infrared rays emitted by the incandescent bulb 92. Therefore, as shown in FIG. The incandescent light bulb 92 is preferably mounted below the LED 95 so that the airflow rises and reaches the entire outer lens 93.
JP 2006-269194 A

また、図６に示す第二の方法の車両用灯具８０は、点灯時のＬＥＤ８１自体が発する熱をアウターレンズ８３の融雪に利用しようとするものであり、ＬＥＤ８１が取付けられたヒートシンク８２とアウターレンズ８３、若しくは、アウターレンズ８３の近傍に存在するエクステンション８４とをヒートチューブ８５により接続し、アウターレンズ８３を加熱し融雪を図るものである。尚、この場合はＬＥＤ８１自体の発熱で融雪するので、車両用灯具８０がヘッドランプなど独立した車両用灯具８０であっても良い。
特開２００６−１４００８４号公報 Further, the vehicular lamp 80 of the second method shown in FIG. 6 is intended to use the heat generated by the LED 81 itself during lighting for melting snow of the outer lens 83, and the heat sink 82 and the outer lens to which the LED 81 is attached. 83 or an extension 84 in the vicinity of the outer lens 83 is connected by a heat tube 85, and the outer lens 83 is heated to melt snow. In this case, since the snow is melted by the heat generated by the LED 81 itself, the vehicular lamp 80 may be an independent vehicular lamp 80 such as a headlamp.
JP 2006-140084 A

そして、第三の方法は、図７に示すように、アウターレンズ７１自体をヒーター７２で加熱しようとするものであり、例えば、細いヒーター線７２などをアウターレンズ７１の内面で、配光の障害とならない部分に貼着し、例えば、外気温、降雪の有無など外気条件に応じて通電するものである。この場合には、点灯用以外の電源を使用するので、図示のように単独の灯具７０でも組合わせ灯具であっても実施可能である。
特開２００６−２４４８８４号公報 In the third method, as shown in FIG. 7, the outer lens 71 itself is to be heated by a heater 72. For example, a thin heater wire 72 or the like is formed on the inner surface of the outer lens 71 and obstructs light distribution. It sticks to the part which does not become and energizes according to outside air conditions, such as the outside temperature, the presence or absence of snowfall, for example. In this case, since a power supply other than lighting is used, the present invention can be implemented with a single lamp 70 or a combination lamp as shown.
JP 2006-244484 A

しかしながら、上記した融雪手段は、先ず、第一の方法は、従来通りに白熱電球から放射される赤外線を使用するものであるので、ハウジング内で対流を生じさせる必要があるなどそのため、アウターレンズ９３全体を暖めるためには、アウターレンズ９３内に仕切を設けるなどは、融雪機能を損なう要因となるので車両用灯具９０のデザインに制約を受ける問題点を生じる。   However, the above-mentioned snow melting means first uses the infrared rays radiated from the incandescent light bulb as usual, so that it is necessary to generate convection in the housing. In order to warm the whole, the provision of a partition in the outer lens 93 causes a problem of impairing the snow melting function, which causes a problem that is restricted by the design of the vehicular lamp 90.

また、第二の方法は、ヒートチューブ８５の熱容量、エクステンション８４とアウターレンズ８３の距離などなどにより、アウターレンズ８３の加熱状態に大きな差異を生じやすく、全ての形状の車両用灯具８０に適用するのには難易度が高く、即ち、汎用性が低いという問題点がある。   The second method is likely to cause a large difference in the heating state of the outer lens 83 depending on the heat capacity of the heat tube 85, the distance between the extension 84 and the outer lens 83, and the like, and is applied to the vehicle lamps 80 of all shapes. However, there is a problem that the degree of difficulty is high, that is, the versatility is low.

また、第三の方法は、アウターレンズ７１に直接にヒーター７２を取付けるものであるので、確実性は高いが、アウターレンズ７１の裏面から加熱を行うので、アウターレンズ７１の表面にまで熱伝導が行われるのに時間を要し、急な降雪時には融雪が遅れ気味となる問題点を生じ、また、別電源を必要とするので消費電力も増大し、これらの点の解決が課題とされるものとなっている。   Further, the third method is to attach the heater 72 directly to the outer lens 71, so the reliability is high. However, since the heating is performed from the back surface of the outer lens 71, heat conduction is performed to the surface of the outer lens 71. It takes time to be performed, and when it snows suddenly, there is a problem that snow melting is delayed, and since a separate power source is required, power consumption increases, and solving these points is a problem It has become.

本発明は、前記した従来の課題を解決するための具体的手段として、透光性レンズで略密閉された空間中にＬＥＤ発光素子が設置されて成る車両用灯具であって、前記ＬＥＤ発光素子の点灯に伴う発熱を車室内側に放散する放熱部が設けられる構成とされた車両用灯具において、前記透光性レンズの外側表面には、少なくとも前記透光性レンズが形成された部材よりも熱伝導性に優れる部材で形成された熱伝導体部が、前記透光性レンズを透過する光量及び配光を実質的に妨げない範囲の細さとして前記透光性レンズの表面側に設けられており、前記熱伝導体部は前記放熱部と接続可能な構成とされていることを特徴とする車両用灯具を提供することで課題を解決するものである。   As a specific means for solving the above-described conventional problems, the present invention is a vehicular lamp in which an LED light-emitting element is installed in a space substantially sealed with a translucent lens, and the LED light-emitting element In the vehicular lamp that is configured to be provided with a heat radiating part that dissipates heat generated when the lamp is turned on to the vehicle interior side, the outer surface of the translucent lens is at least more than the member on which the translucent lens is formed. A heat conductor portion formed of a member having excellent heat conductivity is provided on the surface side of the translucent lens as a light amount that passes through the translucent lens and a thinness within a range that does not substantially interfere with light distribution. And the said heat conductor part is set as the structure which can be connected with the said thermal radiation part, and solves a subject by providing the vehicle lamp characterized by the above-mentioned.

本発明により、透光性レンズ（アウターレンズ）の外面側に、前記透光性レンズよりも熱伝導性に優れる部材で形成された熱伝導体部を設けると共に、この熱伝導体部をＬＥＤの発熱を吸収する放熱部に接続することで、ＬＥＤ点灯時に生じる発熱が効率良くアウターレンズの雪が付着する表面に伝導されるものとなって、速やかに融雪するものとなり、且つ、融雪時にも付加電力も不要として、車両用灯具全体としての消費電力も増加させることなく実施可能とし実用性を向上させる。   According to the present invention, on the outer surface side of the translucent lens (outer lens), a thermal conductor portion formed of a member having higher thermal conductivity than the translucent lens is provided, and this thermal conductor portion is provided on the LED. By connecting to the heat-dissipating part that absorbs heat, the heat generated when the LED is turned on is efficiently conducted to the surface of the outer lens where the snow adheres, and the snow melts quickly. This can be implemented without increasing the power consumption of the entire vehicular lamp, thus improving the practicality.

つぎに、本発明を図に示す実施形態に基づいて詳細に説明する。図１に示すものは本発明に係る車両用灯具１の第一実施例であり、本発明では車両用灯具１がヘッドライトの例で説明するが、他の用途の灯具であっても良いものであることはいうまでもない。そして、この第一実施例においては、光源であるＬＥＤ２は、放熱部（ヒートシンク）３にマウントされている。   Below, this invention is demonstrated in detail based on embodiment shown in a figure. FIG. 1 shows a first embodiment of a vehicular lamp 1 according to the present invention. In the present invention, the vehicular lamp 1 will be described as an example of a headlight. However, the vehicular lamp 1 may be a lamp for other purposes. Needless to say. And in this 1st Example, LED2 which is a light source is mounted in the thermal radiation part (heat sink) 3. As shown in FIG.

尚、前記車両用灯具１がヘッドライトの場合、ＬＥＤ２の発光方向である上方には反射鏡（図示せず）が設けられ、所定方向に光を照射するようにされている。そして、前記ＬＥＤ２を覆っては、ポリカーボネート樹脂など透明樹脂により形成された透光性レンズ４が設けられ、車両用灯具１内の防水が行われている。また、放熱部３は、車両用灯具１の背面側（照射方向と反対側）、換言すれば灯具外に露出するように設置している。   When the vehicular lamp 1 is a headlight, a reflecting mirror (not shown) is provided above the light emitting direction of the LED 2 so as to irradiate light in a predetermined direction. The LED 2 is covered with a translucent lens 4 made of a transparent resin such as a polycarbonate resin so that the vehicle lamp 1 is waterproofed. Moreover, the thermal radiation part 3 is installed so that it may be exposed to the back side (opposite direction of irradiation) of the vehicle lamp 1, in other words, outside the lamp.

ここで、本発明では、前記透光性レンズ４の外側の面４ａには、例えば金属など、前記透光性レンズ４よりも熱伝導性がよい部材で形成された熱伝導体部５が設けられている。このときに、前記熱伝導体部５が不透明部材、或いは、透明度の低い部材である場合には、線状、帯状、或いは、網状などとして、前記透光性レンズ４を透過するＬＥＤ２からの光に対する遮蔽率を減じ、照度、配光特性などに及ぼす影響を少なくする。   Here, in the present invention, the outer surface 4a of the translucent lens 4 is provided with a heat conductor portion 5 formed of a member having a thermal conductivity better than that of the translucent lens 4 such as a metal. It has been. At this time, when the heat conductor 5 is an opaque member or a member with low transparency, the light from the LED 2 that passes through the translucent lens 4 in the form of a line, a band, or a net is used. To reduce the effect on the illuminance, light distribution characteristics, etc.

そして、この第一実施例においては、少なくとも前記熱伝導体部５は前記放熱部３に直接に接触されている。尚、前記透光性レンズ４においては、この透光性レンズ４が形成された部材が、前記放熱部３の温度に耐える耐熱性を有する場合であれば、直接に接触させても良く、耐え得ない場合には断熱材６を介して接続すれば良いものである。   In the first embodiment, at least the heat conductor portion 5 is in direct contact with the heat radiating portion 3. In the translucent lens 4, if the member on which the translucent lens 4 is formed has heat resistance that can withstand the temperature of the heat radiating portion 3, it may be in direct contact with the translucent lens 4. If it cannot be obtained, it may be connected via the heat insulating material 6.

上記に説明したように、本発明の第一実施例では、前記透光性レンズ４の外側の面４ａに熱伝導体部５を設け、この熱伝導体部５を放熱部３に接触させた構成としたことで、ＬＥＤ２が発する熱は、直接に透光性レンズ４の外側の面４ａに達するものとなる。従って、従来例の第三の方法のものと同様に透光性レンズ４の表面に熱伝導体部５を取付けた構成となるが、従来例のものが透光性レンズ４の内側の面であったのに対し、本発明では外側の面４ａであり、透光性レンズ４の肉厚を介して熱伝導を行う従来例に比べて格段に融雪のための熱効率を高めるものとする。   As described above, in the first embodiment of the present invention, the heat conductor portion 5 is provided on the outer surface 4 a of the translucent lens 4, and the heat conductor portion 5 is brought into contact with the heat radiating portion 3. With the configuration, the heat generated by the LED 2 directly reaches the outer surface 4 a of the translucent lens 4. Accordingly, the thermal conductor portion 5 is attached to the surface of the translucent lens 4 as in the third method of the conventional example, but the conventional example is the inner surface of the translucent lens 4. On the other hand, in the present invention, the outer surface 4a is provided and the heat efficiency for melting snow is remarkably improved as compared with the conventional example in which heat conduction is performed through the thickness of the translucent lens 4.

図２に示すものは、本発明に係る車両用灯具１の第二実施例であり、従来例のものは、全て冬季における降雪が、透光性レンズ４に付着したときの融雪手段を提供するものであり、夏期の高温時の対策や作用について述べたものは見受けられない。しかしながら、夏期においては、透光性レンズ４、熱伝導体部５も高温となることは避けられず、これらからの熱が放熱部３に加算されて、放熱部３がより高温となり、ＬＥＤ２に対する冷却能力が不足となる可能性も生じる。   FIG. 2 shows a second embodiment of the vehicular lamp 1 according to the present invention, and all of the conventional examples provide snow melting means when snowfall in winter is attached to the translucent lens 4. However, there is no mention of measures and actions at high temperatures in summer. However, in the summer, it is inevitable that the translucent lens 4 and the heat conductor 5 are also heated, and the heat from these is added to the heat radiating part 3 so that the heat radiating part 3 becomes higher in temperature, There is also a possibility that the cooling capacity will be insufficient.

本発明の第二実施例では、上記のような事態に対応するものであり、この第二実施例では、図３に示すように、炭素繊維強化エポキシ樹脂７ａと、熱膨張係数が大きい金属板７ｂを面接着した、所謂、バイメタルなどと称されている熱感知アクチュエータ７が採用される。   In the second embodiment of the present invention, it corresponds to the above situation. In the second embodiment, as shown in FIG. 3, a carbon fiber reinforced epoxy resin 7a and a metal plate having a large thermal expansion coefficient are used. A heat sensing actuator 7 referred to as a so-called bimetal or the like having the surface 7b bonded thereto is employed.

ここで、第二実施例では、前記熱感知アクチュエータ７は放熱部３の側に設けられており、この放熱部３の温度により作動が行われるようにされている。即ち、前記放熱部３の温度が上昇するに従い、反りが大きくなり、熱感知アクチュエータ７の自由端側は前記熱伝導体部５に近づき、そして所定温度に達した点で、熱伝導体部５に接触する。   Here, in the second embodiment, the heat sensing actuator 7 is provided on the side of the heat dissipating part 3 and is operated according to the temperature of the heat dissipating part 3. That is, as the temperature of the heat dissipating part 3 rises, the warpage increases, the free end side of the heat sensing actuator 7 approaches the heat conductor part 5, and reaches the predetermined temperature, the heat conductor part 5 To touch.

このように、放熱部３と熱伝導体部５とが、熱感知アクチュエータ７を介して接触することで、走行風などによって冷却が行われている側の熱伝導体部５へ放熱部３の熱が移動するものとなり、例えば夏期など外気が高温のときには、熱伝導体部５により放熱部３の温度が低下するものとなるので、放熱部３の過熱によるＬＥＤ２の損傷も防止することができるものとなる。   Thus, the heat radiating part 3 and the heat conductor part 5 are brought into contact with each other via the heat sensing actuator 7, so that the heat conductor part 5 on the side being cooled by the traveling wind or the like is transferred to the heat conductor part 5. For example, when the outside air is at a high temperature such as in summer, the temperature of the heat dissipating part 3 is lowered by the heat conductor 5, so that the LED 2 can be prevented from being damaged due to overheating of the heat dissipating part 3. It will be a thing.

尚、このようにすることで、冬季における融雪の機能には何らの影響も与えることはなく、むしろ、ＬＥＤ２点灯の最初の状態では、熱感知アクチュエータ７による熱伝導体部５側からの放熱部３への熱の移動を生じないので、放熱部３は温度上昇を早急に生じるものとなり、融雪時間が短縮される可能性もある。尚、図２では熱感知アクチュエータ７は２個が取付けられている状態で記載しているが、本発明は前記熱感知アクチュエータ７の数を限定するものではなく、必要な熱量を移動させるのに充分な数を設ければよいものである。   By doing so, there is no influence on the function of melting snow in winter. Rather, in the initial state of LED 2 lighting, the heat radiating portion from the heat conductor portion 5 side by the heat sensing actuator 7 is used. Since no heat is transferred to the heat sink 3, the heat radiating section 3 rapidly increases in temperature, and the snow melting time may be shortened. In FIG. 2, two heat sensing actuators 7 are illustrated as being attached. However, the present invention does not limit the number of heat sensing actuators 7 and is used to move a necessary amount of heat. A sufficient number may be provided.

図４は、本発明の第三実施例を示すもので、この第三実施例は前記車両用灯具１の光源として、ハロゲン電球など白熱電球８が併用されているときに有効である。即ち、すれ違いビームにおいてはＬＥＤ２が点灯されていて融雪能力が低く、それ故に、放熱部３の熱で融雪する必要があるが、走行ビームに切換えた場合には、照射光中に融雪に充分な赤外線を含む。   FIG. 4 shows a third embodiment of the present invention. This third embodiment is effective when an incandescent bulb 8 such as a halogen bulb is used as the light source of the vehicular lamp 1. That is, in the low beam, the LED 2 is lit and the snow melting ability is low. Therefore, it is necessary to melt the snow with the heat of the heat radiating section 3, but when switching to the traveling beam, the melting light is sufficient in the irradiation light. Infrared included.

また、通常には、すれ違いビームと走行ビームとが同時に点灯されることはなく、よって、一方、例えばＬＥＤ２（すれ違いビーム）が点灯されているときには、前記放熱部３が熱源となり、走行ビームが点灯されているときには白熱電球８が融雪の熱源となる。このときに、一方の前記熱感知アクチュエータ７Ａは、前記熱伝導体部５側に取付けられ、自由端側は放熱部３に接している。   Normally, the passing beam and the traveling beam are not lit at the same time. Therefore, for example, when the LED 2 (passing beam) is lit, the heat dissipating section 3 serves as a heat source and the traveling beam is lit. When incandescent, the incandescent bulb 8 becomes a heat source for melting snow. At this time, one of the heat sensing actuators 7A is attached to the heat conductor portion 5 side, and the free end side is in contact with the heat radiating portion 3.

また、他の一方の前記熱感知アクチュエータ７Ｂは、前記放熱部３側に取付けられ、前記熱伝導体部５側となる自由端側は離れている。このようにしたことで、ＬＥＤ２を点灯すれば放熱部３に温度上昇を生じるものとなり、感知アクチュエータ７Ｂの自由端部が熱伝導体部５に接触し融雪を行う。   The other one of the heat sensing actuators 7B is attached to the heat dissipating part 3 side, and the free end side which is the heat conductor part 5 side is separated. By doing so, when the LED 2 is turned on, the temperature of the heat radiating section 3 rises, and the free end of the sensing actuator 7B comes into contact with the heat conductor section 5 to melt snow.

そして、ＬＥＤ２から白熱電球８に切り換えを行えば、即ち、すれ違いビームから走行ビームに切換えれば、白熱電球８からの赤外線により熱伝導体５は温度上昇し、一方の前記熱感知アクチュエータ７Ａは、その自由端側が放熱部３から離れる。同時に、他の一方の熱感知アクチュエータ７Ｂの放熱部３も加熱が行われないものとなるので、その自由端側が熱伝導体部５から離れる。   When the LED 2 is switched to the incandescent lamp 8, that is, when the low beam is switched to the traveling beam, the temperature of the heat conductor 5 is increased by the infrared rays from the incandescent lamp 8, and one of the heat sensing actuators 7A is The free end side is separated from the heat radiating part 3. At the same time, the heat dissipating part 3 of the other one of the heat sensing actuators 7B is not heated, so that the free end side is separated from the heat conductor part 5.

よって、白熱電球８が点灯されたことにより熱伝導体部５に生じた熱が、一方の熱感知アクチュエータ７Ａを介して、ＬＥＤ２が消灯されたことにより温度が低下する放熱部３に伝導されることはなく、ＬＥＤ２が点灯されたときにも、白熱電球８が点灯されたときにも融雪が行えるものとなり、上記に説明したように、ＬＥＤ２と白熱電球８とが光源として混合使用されている車両用灯具１においても本発明は使用可能なものとなる。また図４における熱感知アクチュエータ７Ａは必ずしも必要ではなく、ＬＥＤ２を点灯している場合に必要な放熱が熱感知アクチュエータ７Ｂによって充分に成されている場合には７Ａを省略しても良い。   Therefore, the heat generated in the heat conductor portion 5 when the incandescent bulb 8 is turned on is conducted to the heat radiating portion 3 whose temperature is lowered when the LED 2 is turned off via one heat sensing actuator 7A. There is no such thing as snow melting can be performed both when the LED 2 is lit and when the incandescent bulb 8 is lit, and as described above, the LED 2 and the incandescent bulb 8 are mixed and used as a light source. The present invention can also be used in the vehicular lamp 1. Further, the heat sensing actuator 7A in FIG. 4 is not always necessary, and 7A may be omitted when the heat sensing actuator 7B sufficiently releases heat necessary when the LED 2 is lit.

以上に述べたように本発明は融雪を行う場合について説明を行ったが、本発明は融雪以外の用途にも使用可能であり、例えば、熱帯地方や砂漠地帯などの高熱地域において、ＬＥＤ２を光源とする車両用灯具１を採用する場合には、周囲の気温に影響されて、当然に点灯時のＬＥＤ２の温度もより以上に上昇するものとなることが考えられる。   As described above, the present invention has been described for the case of melting snow. However, the present invention can also be used for applications other than snow melting. For example, in a high heat area such as a tropical region or a desert area, the LED 2 is used as a light source. When the vehicular lamp 1 is adopted, it is considered that the temperature of the LED 2 at the time of lighting is naturally further increased due to the influence of the ambient temperature.

このような場合、通常には放熱部３（ヒートシンク）の体積を増すなどして、より大量の発熱を吸収するものとするが、前記放熱部３は、例えば、エンジンルームなど高温の場所に設置されることが多く、放熱部３の体積の増加が予想通りの効果が得られない場合もある。また、緊急自動車などにおいては昼間でもヘッドライトを点灯して走行しなければならない場合もあり、一層の放熱部３の熱容量が要求される場合もあり得る。   In such a case, the heat radiation unit 3 (heat sink) is usually increased in volume to absorb a larger amount of heat, but the heat radiation unit 3 is installed in a high temperature place such as an engine room, for example. In many cases, an increase in the volume of the heat radiating unit 3 may not provide the expected effect. Further, in an emergency car or the like, it may be necessary to run with the headlights turned on even in the daytime, and a further heat capacity of the heat dissipating unit 3 may be required.

本発明によれば、このような場合、透光性レンズ４に熱伝導体部５を設け、この熱伝導体部５を直接（図１参照）或いは、熱感知アクチュエータ７など熱伝導性に優れる部材で接続しておけば、例え、放熱部３がエンジンルーム内など熱的環境が好ましくない場所に設けられているときにも、走行風により冷却される熱伝導体部５に熱は移動し、過熱が防止されるものとなる。   According to the present invention, in such a case, the translucent lens 4 is provided with the heat conductor portion 5, and the heat conductor portion 5 is excellent in heat conductivity such as directly (see FIG. 1) or the heat sensing actuator 7. If connected by a member, for example, even when the heat dissipating part 3 is provided in a place where a thermal environment is not preferable such as in an engine room, the heat is transferred to the heat conductor part 5 cooled by the traveling wind. , Overheating is prevented.

以上に説明したように、本発明により透光性レンズ４の外面に熱伝導体部５を設け放熱部３と熱伝導性の良い部材で接続する構成としたことで、放熱部３で生じる熱が直接に透光性レンズ４の外面に付着した積雪に伝導されるようにして、速やかに融雪が行われるようにするものであり、また同時に、放熱部３の温度も低下させ、ＬＥＤ２の過熱も防止し破損などを生じないものとして信頼性を高めるものである。   As described above, according to the present invention, the heat conductor portion 5 is provided on the outer surface of the translucent lens 4 and is connected to the heat radiating portion 3 with a member having good heat conductivity. Is directly conducted to the snow accumulated on the outer surface of the translucent lens 4 so that the snow is melted quickly. At the same time, the temperature of the heat dissipating section 3 is also lowered, and the LED 2 is overheated. This prevents the damage and does not cause breakage and enhances the reliability.

本発明に係るに車両用灯具の第一実施例を示す略示的な断面図である。1 is a schematic sectional view showing a first embodiment of a vehicular lamp according to the present invention. 同じく、本発明に係るに車両用灯具の第二実施例を示す略示的な断面図である。Similarly, it is a schematic sectional view showing a second embodiment of a vehicular lamp according to the present invention. 熱感知アクチュエータの構成を示す説明図である。It is explanatory drawing which shows the structure of a heat sensing actuator. 同じく、本発明に係るに車両用灯具の第三実施例を示す略示的な断面図である。Similarly, it is a schematic sectional view showing a third embodiment of a vehicular lamp according to the present invention. 従来例の第一の融雪方法の構成を示す説明図である。It is explanatory drawing which shows the structure of the 1st snow melting method of a prior art example. 従来例の第二の融雪方法の構成を示す説明図である。It is explanatory drawing which shows the structure of the 2nd snow melting method of a prior art example. 従来例の第三の融雪方法の構成を示す説明図である。It is explanatory drawing which shows the structure of the 3rd snow melting method of a prior art example.

符号の説明Explanation of symbols

１…車両用灯具
２…ＬＥＤ
３…放熱部
４…透光性レンズ
４ａ…外側の面
５…熱伝導体部
６…断熱材
７、７Ａ，７Ｂ…熱感知アクチュエータ
８…白熱電球 1 ... Vehicle lamp 2 ... LED
DESCRIPTION OF SYMBOLS 3 ... Radiation part 4 ... Translucent lens 4a ... Outer surface 5 ... Heat conductor part 6 ... Heat insulating material 7, 7A, 7B ... Heat sensing actuator 8 ... Incandescent light bulb

Claims (3)

透光性レンズで略密閉された空間中にＬＥＤ発光素子が設置されて成る車両用灯具であって、前記ＬＥＤ発光素子の点灯に伴う発熱を車室内側に放散する放熱部が設けられる構成とされた車両用灯具において、前記透光性レンズの外側表面には、少なくとも前記透光性レンズが形成された部材よりも熱伝導性に優れる部材で形成された熱伝導体部が、前記透光性レンズを透過する光量及び配光を実質的に妨げない範囲の細さとして前記透光性レンズの表面側に設けられており、前記熱伝導体部は前記放熱部とが接続可能な構成とされていることを特徴とする車両用灯具。   A vehicular lamp in which an LED light emitting element is installed in a space substantially sealed by a translucent lens, and a heat dissipating part is provided to dissipate heat generated when the LED light emitting element is turned on to the vehicle interior side. In the vehicular lamp, a heat conductor portion formed of a member having at least a thermal conductivity than the member on which the translucent lens is formed is provided on the outer surface of the translucent lens. The amount of light transmitted through the transmissive lens and the thinness of the range that does not substantially interfere with the light distribution are provided on the surface side of the translucent lens, and the thermal conductor portion is configured to be connectable to the heat radiating portion. A vehicular lamp characterized by being made. 前記放熱部には熱感アクチュエータが設けられ、前記放熱部の温度が所定値以上となったときにには前記熱感アクチュエータが作動し、前記放熱部と前記熱伝導体部の接続が行われることを特徴とする請求項１に記載の車両用灯具。   The heat radiating part is provided with a heat sensitive actuator, and when the temperature of the heat radiating part becomes a predetermined value or more, the heat sensitive actuator is activated to connect the heat radiating part and the heat conductor part. The vehicular lamp according to claim 1. 前記熱伝導体部には感熱アクチュエータが設けられ、前記熱伝導体部の温度が所定値以下となったときには、前記放熱部と前記熱伝導体部との接続が行われることを特徴とする請求項１に記載の車両用灯具。   The heat conductor is provided with a heat-sensitive actuator, and when the temperature of the heat conductor becomes a predetermined value or less, the heat radiating part and the heat conductor are connected. Item 2. A vehicle lamp according to Item 1.
JP2008024110A 2008-02-04 2008-02-04 Vehicular lighting fixture Pending JP2009187707A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102003668A (en) * 2009-08-26 2011-04-06 现代摩比斯株式会社 Headlamp for vehicle
JP2012164429A (en) * 2011-02-03 2012-08-30 Koito Mfg Co Ltd Vehicle headlamp
JP2012164428A (en) * 2011-02-03 2012-08-30 Koito Mfg Co Ltd Vehicle headlamp
CN102691955A (en) * 2011-03-25 2012-09-26 丰田合成株式会社 Vehicle headlamp
JP2013016269A (en) * 2011-06-30 2013-01-24 Citizen Holdings Co Ltd Traffic light
JP2015099637A (en) * 2013-11-18 2015-05-28 ボルボトラックコーポレーション Vehicle lamp fitting
CN105917161A (en) * 2013-12-02 2016-08-31 Lg伊诺特有限公司 Lamp unit, and lighting device and vehicle lamp using same
WO2017081999A1 (en) * 2015-11-11 2017-05-18 Ｎｅｃライティング株式会社 Lamp
US10591124B2 (en) 2012-08-30 2020-03-17 Sabic Global Technologies B.V. Heat dissipating system for a light, headlamp assembly comprising the same, and method of dissipating heat
US10612243B2 (en) 2018-05-08 2020-04-07 Gregory A Header Heated snow guard
US10954674B2 (en) 2018-05-08 2021-03-23 Gregory A. Header Heated snow guard

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273369A (en) * 2006-03-31 2007-10-18 Stanley Electric Co Ltd Vehicular lighting fixture
JP2007305338A (en) * 2006-05-09 2007-11-22 Ichikoh Ind Ltd Vehicular lighting fixture

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007273369A (en) * 2006-03-31 2007-10-18 Stanley Electric Co Ltd Vehicular lighting fixture
JP2007305338A (en) * 2006-05-09 2007-11-22 Ichikoh Ind Ltd Vehicular lighting fixture

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102003668A (en) * 2009-08-26 2011-04-06 现代摩比斯株式会社 Headlamp for vehicle
JP2012164429A (en) * 2011-02-03 2012-08-30 Koito Mfg Co Ltd Vehicle headlamp
JP2012164428A (en) * 2011-02-03 2012-08-30 Koito Mfg Co Ltd Vehicle headlamp
CN102691955A (en) * 2011-03-25 2012-09-26 丰田合成株式会社 Vehicle headlamp
JP2012204168A (en) * 2011-03-25 2012-10-22 Toyoda Gosei Co Ltd Vehicular headlight
JP2013016269A (en) * 2011-06-30 2013-01-24 Citizen Holdings Co Ltd Traffic light
US10591124B2 (en) 2012-08-30 2020-03-17 Sabic Global Technologies B.V. Heat dissipating system for a light, headlamp assembly comprising the same, and method of dissipating heat
JP2015099637A (en) * 2013-11-18 2015-05-28 ボルボトラックコーポレーション Vehicle lamp fitting
CN105917161A (en) * 2013-12-02 2016-08-31 Lg伊诺特有限公司 Lamp unit, and lighting device and vehicle lamp using same
CN105917161B (en) * 2013-12-02 2019-05-03 Lg伊诺特有限公司 Lamp unit and the lighting apparatus and car light for using the lamp unit
US10429027B2 (en) 2013-12-02 2019-10-01 Lg Innotek Co., Ltd. Lamp unit, and lighting device and vehicle lamp using same
WO2017081999A1 (en) * 2015-11-11 2017-05-18 Ｎｅｃライティング株式会社 Lamp
JPWO2017081999A1 (en) * 2015-11-11 2018-08-30 Ｎｅｃライティング株式会社 lamp
US10627057B2 (en) 2015-11-11 2020-04-21 HotaluX, Ltd. Lamp
US10612243B2 (en) 2018-05-08 2020-04-07 Gregory A Header Heated snow guard
US10954674B2 (en) 2018-05-08 2021-03-23 Gregory A. Header Heated snow guard
US11208810B2 (en) 2018-05-08 2021-12-28 Gregory A Header Snow guard

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