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JP4452386B2 - Lamp - Google Patents
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JP4452386B2 - Lamp - Google Patents

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Publication number
JP4452386B2
JP4452386B2 JP2000262939A JP2000262939A JP4452386B2 JP 4452386 B2 JP4452386 B2 JP 4452386B2 JP 2000262939 A JP2000262939 A JP 2000262939A JP 2000262939 A JP2000262939 A JP 2000262939A JP 4452386 B2 JP4452386 B2 JP 4452386B2
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JP
Japan
Prior art keywords
arc
reference circle
partition
arcs
lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP2000262939A
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Japanese (ja)
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JP2002075018A (en
JP2002075018A5 (en
Inventor
俊幸 近藤
英隆 岡田
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Stanley Electric Co Ltd
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Stanley Electric Co Ltd
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Priority to JP2000262939A priority Critical patent/JP4452386B2/en
Publication of JP2002075018A publication Critical patent/JP2002075018A/en
Publication of JP2002075018A5 publication Critical patent/JP2002075018A5/ja
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • F21V7/09Optical design with a combination of different curvatures

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

Description

【0001】
【発明の属する技術分野】
本発明は灯具に関するものであり、詳細にはテールランプ、ストップランプなど、歩行者、他車などに自車の存在あるいは行動を告知するために用いられる信号用の灯具に係るものである。
【0002】
【従来の技術】
近年においては透明度の高いデザインが好まれるものとなっているので、アウターレンズにはレンズカットを施すことなく、反射鏡に凸面または凹面の区画を設け、この区画により配光特性を形成するものが多く採用されている。図5は車両用灯具80の外形が略円形であるときの反射鏡81における区画82の形状の例であり、車両用灯具80の形状に合わせて同心円と放射線との交差をもって区画82の形状が設定されることが多い。
【0003】
また、図6は示は車両用灯具90の外形が略方形である時の区画92の形状の例であり、車両用灯具90の形状に合わせて区画92もまた長方形、正方形など方形のものとして形成されることが多い。このように区画82、92が形成されたことで、車両用灯具80においても、車両用灯具90においてもアウターレンズ83、93はレンズカットなしの素通し状とされ、透明感が得られるものとされている。
【0004】
【発明が解決しようとする課題】
しかしながら、車両用灯具においては、車体のデザインとの整合などの点から、外形形状はそれ程に変化をさせられるものではなく、上記に説明したように略円形の車両用灯具80、あるいは、略方形の車両用灯具90の二種類に実質的には限定されるものとなっている。
【0005】
このことは即ち、全ての車両が車両用灯具80あるいは車両用灯具90の何れかを装備している状態となり、例えば使用者側から見ると後続車から見たときに先行車はどれも同じデザインのものに見え印象が陳腐化するものとなると共に、車両の生産者側においても明確なデザインの相違により他社との違いを主張することが困難である問題点を生じている。
【0006】
【課題を解決するための手段】
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、放物系である基本反射面に対し、この基本反射面を正面視する状態でこの反射面の電球取付孔の近傍に適宜の径を有する基準円を想定すると共に、該基準円に内接する第一の円弧と、該基準円に外接する第二の円弧の2種の円弧を想定し、これら第一の円弧と第二の円弧の直径はともにこの基準円から前記基本反射面の外径までよりも大きい径を有しそれぞれが逆向とされ、これら第一の円弧の任意の複数を前記基準円に略定ピッチで接したものとこれら第二の円弧の任意の複数を前記基準円に略定ピッチで接したもので生じる紋様状に区画反射面を形成したことを特徴とする灯具を提供することで課題を解決するものである。
【0007】
【発明の実施の形態】
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〜図3に符号1で示すものは本発明に係る車両用灯具であり、この車両用灯具1はテールランプ、ストップランプ、ターンシグナルランプなど車両の信号用として使用される灯具であり、例えば白熱電球である光源2と、この光源2からの光を照射方向に反射し区画4が設けられた反射鏡3と、素通し状のアウターレンズ5とから構成されている。
【0008】
前記反射鏡3は、図2中に鎖線で示すように基本的には回転放物面(基本反射面3A)として形成され、前記光源2からの光を平行光線として照射方向Xに反射するものとされている。そして、この基本反射面3A上に凸面または凹面とした区画4が設けられ、この区画4により反射鏡3自体で配光特性を形成するものとし、これによりアウターレンズ5からレンズカットを省略し、透明感を高めることを目的とするものである点は従来例のものと同様である。
【0009】
ここで、本発明は、前記区画4を形成するときの新規の形成手段を提供するものであり、まず、反射鏡3の電球取付孔3aの近傍に基準円4aを想定すると共に、この基準円4aを内接させる第一の円弧4bと、同じ基準円4aに外接する第二の円弧4cも想定する。
【0010】
このときに、一方の円弧4bの直径は、前記基準円4aを内接させる状態において、この基準円4aから前記基本反射面3A、即ち、反射鏡3の外径までよりも適宜に大きいものとされている。また、他方の円弧4cの直径も、この他方の円弧4cが基準円4aに外接する状態において、基準円4aから反射鏡3の外径までよりも適宜に大きいものとされている。また、この実施形態においては、一方の円弧4bと他方の円弧4cとは、お互いが逆方向に向い湾曲するもの、即ち、逆反りのものとされている。
【0011】
このようにして、それぞれが設定された一方の円弧4bと他方の円弧4cとで区画4を形成するときには、一方の円弧4bの任意数と、他方の円弧4cの任意数が組合わされるものであるが、図1では形状を具体的にするために一方の円弧4bの12本と、他方の円弧4cの24本を組合わせた例で示し、また説明も図の状態に準じて行う。
【0012】
まず、前記一方の円弧4bは、この実施形態においては、前記基準円4aから右回りで反射鏡3の外径に向うものとされ、また、前記基準円4aには12本が等間隔(即ち、30゜間隔)で接しているものとされている。これに対して他方の円弧4cは、前記基準円4aから左回りで反射鏡3の外径に向うようにして、24本が15度間隔で接しているものとされている。
【0013】
このようにすることで、反射鏡3の面には一方の円弧4bと他方の円弧4cとで囲まれる、四辺が円弧の略菱形状の区画4が形成されるものとなり、反射鏡3の全体の印象としては渦巻状となる紋様が表れるものとなるので、前記区画4のそれぞれに対して、適度の凸面状あるいは凹面状とする加工を行えば、この区画4は光を拡散するものとなり、反射鏡3自体で配光特性が得られるものとなる。
【0014】
図3は前記区画4の構成を詳細に示すものであり、尚、この説明では区画4は凸面で形成されている例で説明するが、凹面であっても同様な手段で形成可能である。図中に符号Bで示す線は前記基本反射面3Aを形成する曲面上での区画4を囲む線である。
【0015】
そして、前記区画4の略中心となる位置には、この区画4に要求される光の拡散度に応じる高さとした頂点Pが設定されると共に、この頂点を高さ方向で通る任意方向の切断面が想定される。このようにすると前記切断面には頂点Pと2つの区画線とが表れるものとなるので、この3点を結ぶ円弧Rを想定しながら、切断面を回転させていけば、区画4を形成する凸面が得られるものとなる。
【0016】
よって、区画4は全体としては基本反射面3Aに沿うものであるので、光源2からの光を照射方向に向う平行光線から上下左右に拡散するものとなり、車両用の信号灯具1としての配光特性が得られるものとなる、尚、発明者のこの発明を成すための検討の結果では、前記した区画線の全てが基本反射面3A上になくとも良く、各区画線同士の交点Q、即ち、隅部が基本反射面3A上にあるときにも、ほぼ同様な作用が得られるものであることが確認された。
【0017】
また、この実施形態では、区画4を形成するための一方の円弧4bが、基準円4aを内接させ、かつ、右回りのものであり、他方の円弧4cが基準円に外接し、かつ、左回りのものであったが、図示は省略するが、これは、一方の円弧4bを外接の右回り、他方の円弧4cを内接の左回りとしても良いものであり、更には、双方のものを作成し、車体に線対称となるように取付けても良いものである。
【0018】
図4は本発明に係る車両用灯具1の別の実施形態であり、前の実施形態では、区画4を形成するために、一方の円弧4bを基準円4aを内接させる円弧、他方の円弧4cを外接する円弧としていたが、この実施形態では双方を基準円4aを内接させる円弧として形成したものである。更には、本発明によれば一方の円弧4bと他方の円弧4cに、例えば一方を放物線、楕円とするなど工夫を凝らすことで、反射鏡3の面には様々な紋様のバリエーションが実現できるものとなる。また、本発明においては、光源2をLEDランプに変更するなども自在であることはいうまでもない。
【0019】
【発明の効果】
以上に説明したように本発明により、放物系である基本反射面に対し、この基本反射面を正面視する状態でこの反射面の電球取付孔の近傍に適宜の径を有する基準円を想定すると共に、該基準円に内接する第一の円弧と、該基準円に外接する第二の円弧の2種の円弧を想定し、これら第一の円弧と第二の円弧の直径はともにこの基準円から前記基本反射面の外径までよりも大きい径を有しそれぞれが逆向とされ、これら第一の円弧の任意の複数を前記基準円に略定ピッチで接したものとこれら第二の円弧の任意の複数を前記基準円に略定ピッチで接したもので生じる紋様状に区画反射面を形成したことを特徴とする灯具としたことで、第一には、従来にない斬新な紋様の灯具の実現を可能とし他車との識別性を高めると共に美観も向上させ、この種の車両用灯具の商品性の向上に極めて優れた効果を奏するものである。
【0020】
また、第二には、この灯具を形成するための金型の設計技術、あるいは、製作技術にも従来の方法が転用可能であり、また新たに追加される組立工程なども不要であるので、コストアップの要因が一切なく、従来と同等のコストで斬新な灯具が供給可能であり、この面からも商品性の向上に極めて優れた効果を奏するものとなる。
【図面の簡単な説明】
【図1】 本発明に係る車両用灯具の実施形態をアウターレンズを透視する状態で示す正面図である。
【図2】 図1のA−A線に沿う断面図である。
【図3】 同じ実施形態の要部を示す説明図である。
【図4】 同じく本発明に係る車両用灯具の別の実施形態を一部を破断した状態で示す正面図である。
【図5】 従来例を一部を破断した状態で示す正面図である。
【図6】 別の従来例を一部を破断した状態で示す正面図である。
【符号の説明】
1……車両用灯具
2……光源
3……反射鏡
3a……電球取付孔
3A……基本反射面
4……区画
4a……基準円
4b……一方の円弧
4c……他方の円弧
5……アウターレンズ
P……頂点
Q……交点
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp, and more particularly to a signal lamp used for notifying a pedestrian, another vehicle, or the like of the presence or behavior of a host vehicle, such as a tail lamp or a stop lamp.
[0002]
[Prior art]
In recent years, a design with high transparency has been favored. Therefore, the outer lens is not provided with a lens cut, and the reflecting mirror is provided with a convex or concave section to form a light distribution characteristic. Many have been adopted. FIG. 5 shows an example of the shape of the section 82 in the reflecting mirror 81 when the outer shape of the vehicular lamp 80 is substantially circular. The shape of the section 82 is such that the concentric circle and the radiation intersect with the shape of the vehicular lamp 80. Often set.
[0003]
FIG. 6 shows an example of the shape of the section 92 when the outer shape of the vehicular lamp 90 is substantially square. According to the shape of the vehicular lamp 90, the section 92 is also rectangular such as rectangular or square. Often formed. By forming the sections 82 and 92 in this way, the outer lenses 83 and 93 in both the vehicular lamp 80 and the vehicular lamp 90 are made through-through without lens cut, and a transparent feeling can be obtained. ing.
[0004]
[Problems to be solved by the invention]
However, in the vehicular lamp, the outer shape is not changed so much from the viewpoint of matching with the design of the vehicle body. As described above, the vehicular lamp 80 having a substantially circular shape or a substantially rectangular shape is used. The vehicle lamp 90 is substantially limited to two types.
[0005]
This means that all vehicles are equipped with either the vehicle lamp 80 or the vehicle lamp 90. For example, when viewed from the user side, all the preceding vehicles have the same design. This makes the impression obsolete and makes it difficult for vehicle producers to claim differences from other companies due to clear design differences.
[0006]
[Means for Solving the Problems]
As a specific means for solving the above-described conventional problems, the present invention appropriately adjusts the basic reflection surface, which is a parabolic system, in the vicinity of the bulb mounting hole of the reflection surface in a state where the basic reflection surface is viewed from the front. And a first arc inscribed in the reference circle and a second arc circumscribed in the reference circle, and the first and second arcs are assumed. Both of the diameters of the second arcs are larger than the reference circle to the outer diameter of the basic reflecting surface, and each of them has a reverse direction, and an arbitrary plurality of these first arcs are arranged at a substantially constant pitch on the reference circle. The problem is solved by providing a lamp characterized in that a partition reflecting surface is formed in a pattern that is formed by contacting a contact circle and any of the second arcs with the reference circle at a substantially constant pitch. To do.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Below, this invention is demonstrated in detail based on embodiment shown in a figure. 1 to 3 is a vehicular lamp according to the present invention. The vehicular lamp 1 is a lamp used for a vehicle signal such as a tail lamp, a stop lamp, or a turn signal lamp. The light source 2 is an incandescent light bulb, the reflector 3 is provided with a section 4 that reflects light from the light source 2 in the irradiation direction, and a transparent outer lens 5.
[0008]
The reflecting mirror 3 is basically formed as a rotating paraboloid (basic reflecting surface 3A) as shown by a chain line in FIG. 2, and reflects the light from the light source 2 in the irradiation direction X as parallel rays. It is said that. Then, a section 4 having a convex surface or a concave surface is provided on the basic reflecting surface 3A, and the light distribution characteristic is formed by the reflecting mirror 3 itself by the section 4, thereby omitting the lens cut from the outer lens 5, It is the same as that of the conventional example in that the purpose is to enhance the transparency.
[0009]
Here, the present invention provides a novel forming means when forming the section 4. First, a reference circle 4 a is assumed in the vicinity of the bulb mounting hole 3 a of the reflector 3, and this reference circle is also provided. A first arc 4b that inscribes 4a and a second arc 4c that circumscribes the same reference circle 4a are also assumed.
[0010]
At this time, the diameter of one arc 4b is appropriately larger than the reference circle 4a to the basic reflecting surface 3A, that is, the outer diameter of the reflecting mirror 3 in a state in which the reference circle 4a is inscribed. Has been. Further, the diameter of the other arc 4c is appropriately larger than the reference circle 4a to the outer diameter of the reflecting mirror 3 when the other arc 4c circumscribes the reference circle 4a. In this embodiment, one arc 4b and the other arc 4c are curved in opposite directions, that is, reversely warped.
[0011]
In this way, when the section 4 is formed by one arc 4b and the other arc 4c that are set, the arbitrary number of one arc 4b and the arbitrary number of the other arc 4c are combined. However, FIG. 1 shows an example in which 12 arcs 4b and 24 arcs 4c are combined in order to make the shape concrete, and the description will be made according to the state of the figure.
[0012]
First, in this embodiment, the one arc 4b is clockwise from the reference circle 4a toward the outer diameter of the reflecting mirror 3, and twelve of the reference circle 4a are equally spaced (that is, , 30 ° intervals). On the other hand, the other arc 4c is made to contact 24 at 15 degree intervals so as to turn counterclockwise from the reference circle 4a toward the outer diameter of the reflecting mirror 3.
[0013]
By doing so, the surface of the reflecting mirror 3 is formed with a substantially rhombic section 4 having four arcs surrounded by one arc 4b and the other arc 4c. As an impression of the above, a spiral pattern appears, and if each of the sections 4 is processed to have an appropriate convex or concave shape, the sections 4 diffuse light. The light distribution characteristics can be obtained by the reflecting mirror 3 itself.
[0014]
FIG. 3 shows the configuration of the section 4 in detail. In this description, the section 4 is described as being formed as a convex surface. However, even a concave surface can be formed by the same means. A line indicated by a symbol B in the figure is a line surrounding the section 4 on the curved surface forming the basic reflection surface 3A.
[0015]
A vertex P having a height corresponding to the degree of light diffusion required for the partition 4 is set at a position substantially at the center of the partition 4 and cutting in any direction passing through the vertex in the height direction. A surface is assumed. In this way, since the apex P and two division lines appear on the cut surface, if the cut surface is rotated while assuming the arc R connecting these three points, the division 4 is formed. A convex surface is obtained.
[0016]
Accordingly, since the section 4 is generally along the basic reflection surface 3A, the light from the light source 2 is diffused vertically and horizontally from the parallel light rays directed in the irradiation direction, and the light distribution as the signal lamp 1 for the vehicle. As a result of the inventor's examination for achieving the present invention, not all of the lane markings described above need be on the basic reflection surface 3A, and the intersection point Q between the lane markings, that is, It has been confirmed that substantially the same operation can be obtained even when the corner is on the basic reflecting surface 3A.
[0017]
Further, in this embodiment, one arc 4b for forming the section 4 is inwardly inscribed with the reference circle 4a and is clockwise, and the other arc 4c is circumscribed with the reference circle, and Although it is counterclockwise, it is not shown in the figure, but it is also possible that one arc 4b is circumscribed clockwise and the other arc 4c is inscribed counterclockwise. A thing may be created and attached to the vehicle body so as to be line symmetric.
[0018]
FIG. 4 shows another embodiment of the vehicular lamp 1 according to the present invention. In the previous embodiment, one arc 4b is inscribed in the reference circle 4a and the other arc is formed in order to form the section 4. 4c is circumscribed as an arc, but in this embodiment, both are formed as arcs that inscribe the reference circle 4a. Further, according to the present invention, various patterns can be realized on the surface of the reflector 3 by elaborating the one arc 4b and the other arc 4c, for example, one is a parabola or ellipse. It becomes. In the present invention, it goes without saying that the light source 2 can be changed to an LED lamp.
[0019]
【The invention's effect】
As described above, according to the present invention, a reference circle having an appropriate diameter in the vicinity of the bulb mounting hole of the reflecting surface is assumed in a state where the basic reflecting surface is viewed from the front with respect to the basic reflecting surface which is a parabolic system. Assuming two arcs, a first arc inscribed in the reference circle and a second arc circumscribed in the reference circle, the diameters of the first arc and the second arc are both Each having a larger diameter than the reference circle to the outer diameter of the basic reflecting surface, each of which has a reverse direction, and a plurality of these first arcs in contact with the reference circle at a substantially constant pitch, and the second The lamp is characterized by the fact that the partition reflecting surface is formed in a pattern that is formed by contacting an arbitrary plurality of arcs with the reference circle at a substantially constant pitch . First, a novel pattern that has never existed before The lamp can be realized, and the distinctiveness from other cars is improved and the beauty is improved. In which exhibits an extremely excellent effect in improving the marketability of the species of the vehicle lamp.
[0020]
In addition, secondly, the conventional method can be diverted to the design technique of the mold for forming the lamp, or the production technique, and a newly added assembly process is not necessary. There is no cause for cost increase, and it is possible to supply a novel lamp at the same cost as the conventional one. From this aspect, it is very effective in improving the merchantability.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a vehicular lamp according to the present invention in a state where an outer lens is seen through.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is an explanatory diagram showing a main part of the same embodiment.
FIG. 4 is a front view showing another embodiment of the vehicular lamp according to the present invention in a partially broken state.
FIG. 5 is a front view showing a conventional example in a partially broken state.
FIG. 6 is a front view showing another conventional example in a partially broken state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Light source 3 ... Reflector 3a ... Light bulb mounting hole 3A ... Basic reflection surface 4 ... Section 4a ... Reference circle 4b ... One arc 4c ... The other arc 5 ... ... Outer lens P ... Vertex Q ... Intersection

Claims (4)

放物系である基本反射面に対し、この基本反射面を正面視する状態でこの反射面の電球取付孔の近傍に適宜の径を有する基準円を想定すると共に、該基準円に内接する第一の円弧と、該基準円に外接する第二の円弧の2種の円弧を想定し、これら第一の円弧と第二の円弧の直径はともにこの基準円から前記基本反射面の外径までよりも大きい径を有しそれぞれが逆向とされ、これら第一の円弧の任意の複数を前記基準円に略定ピッチで接したものとこれら第二の円弧の任意の複数を前記基準円に略定ピッチで接したもので生じる紋様状に区画反射面を形成したことを特徴とする灯具。A reference circle having an appropriate diameter is assumed in the vicinity of the bulb mounting hole on the reflection surface in a state where the basic reflection surface is viewed from the front with respect to the basic reflection surface which is a parabolic system, and is inscribed in the reference circle . Assuming two arcs, a first arc and a second arc circumscribing the reference circle, the diameters of the first arc and the second arc are both the outer diameter of the basic reflecting surface from the reference circle. Each of which has a diameter larger than that of each of the first arcs, and each of the first arcs is in contact with the reference circle at a substantially constant pitch, and any of the second arcs is connected to the reference circle. A lamp characterized in that a partition reflection surface is formed in a pattern that is generated by contact with a substantially constant pitch . 前記区画反射面に凸または凹の曲面を形成したことを特徴とする請求項1記載の灯具。  The lamp according to claim 1, wherein a convex or concave curved surface is formed on the partition reflecting surface. 前記区画反射面の前記凸または凹の曲面の隅部は前記基本反射面を形成する曲面上にあることを特徴とする請求項2記載の灯具。  The lamp according to claim 2, wherein a corner of the convex or concave curved surface of the partition reflecting surface is on a curved surface forming the basic reflecting surface. 前記区画反射面の前記隅部を結ぶ区画線は前記基本反射面を形成する曲面上にあり、前記区画反射面の中心近傍に適宜な高さとして設けられる頂点と、この頂点を高さ方向に通る任意方向の切断面に表れる前記区画線とを結ぶ円弧の集合である複合凸面もしくは複合凹面であることを特徴とする請求項3記載の灯具。  A partition line connecting the corners of the partition reflection surface is on a curved surface forming the basic reflection surface, and a vertex provided at an appropriate height near the center of the partition reflection surface, and the vertex in the height direction. The lamp according to claim 3, wherein the lamp is a composite convex surface or a composite concave surface, which is a set of arcs connecting the partition lines appearing on a cut surface in an arbitrary direction passing therethrough.
JP2000262939A 2000-08-31 2000-08-31 Lamp Expired - Fee Related JP4452386B2 (en)

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JP2002075018A5 JP2002075018A5 (en) 2004-09-02
JP4452386B2 true JP4452386B2 (en) 2010-04-21

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006038382A1 (en) * 2006-08-15 2008-02-28 Schott Ag Reflector for gas discharge lamps
JP5582334B2 (en) * 2010-02-17 2014-09-03 スタンレー電気株式会社 Reflector
JP5556427B2 (en) * 2010-06-24 2014-07-23 岩崎電気株式会社 Reflector
JP6032790B2 (en) 2012-03-02 2016-11-30 現代自動車株式会社Hyundai Motor Company Vehicle lighting
JP2013182833A (en) 2012-03-02 2013-09-12 Hyundai Motor Co Ltd Wide light-emitting region lamp for vehicle

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