WO2015145970A1 - 車両用ランプ - Google Patents
車両用ランプ Download PDFInfo
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- WO2015145970A1 WO2015145970A1 PCT/JP2015/000967 JP2015000967W WO2015145970A1 WO 2015145970 A1 WO2015145970 A1 WO 2015145970A1 JP 2015000967 W JP2015000967 W JP 2015000967W WO 2015145970 A1 WO2015145970 A1 WO 2015145970A1
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- housing
- ventilation
- lens
- lamp
- light source
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Classifications
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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
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/0005—Devices preventing the lights from becoming dirty or damaged, e.g. protection grids or cleaning by air flow
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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
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/30—Ventilation or drainage of lighting devices
- F21S45/37—Ventilation or drainage of lighting devices specially adapted for signal lamps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
Definitions
- the present invention relates to a vehicle lamp.
- Vehicle lamps such as headlamps and tail lamps have a lamp space formed by a lens and a housing.
- a light source such as an LED bulb is arranged in the lamp space.
- condensation occurs in the lamp space and the lens is clouded. In order to prevent the occurrence of condensation, it is effective to form a completely closed lamp space.
- the plastics that make up the lens and housing are hygroscopic, it is essentially impossible to form a completely sealed lamp space. Further, when a completely sealed lamp space is formed, moisture that has once entered the lamp space cannot be released to the outside. Therefore, a conventional vehicle lamp is provided with a ventilation member for preventing the lens from fogging (see Patent Documents 1 and 2).
- the ventilation member prevents foreign substances such as rainwater and dust from entering the lamp space, and allows a gas such as water vapor to move between the lamp space and the external space.
- the ventilation member also has a role of preventing the pressure in the lamp space from increasing as the temperature changes.
- the structure of a vehicle lamp in recent years is very complicated as represented by a combination lamp. If the structure of the vehicle lamp is complicated, the effect of preventing fogging by the ventilation member may not be sufficiently obtained. Moreover, even if the structure of the vehicle lamp is simple, the fog prevention effect by the ventilation member may not be sufficiently obtained.
- An object of the present invention is to provide a technique for preventing fogging of a lens in a vehicle lamp.
- the inventors of the present invention investigated in detail in which place of the vehicle lamp it is difficult to prevent fogging and it is difficult to remove the generated fogging. As a result, it has been found that it is difficult to prevent or remove fogging in a place where the gap between the lens and the housing is narrow (stenosis region).
- this disclosure A light source; A lens disposed in front of the light source; A housing which is combined with the lens to form a lamp space in which the light source is disposed; A vent provided in the housing for venting the lamp space; With The lamp space includes a constricted region in which a distance between the lens and the housing is 10 mm or less, The ventilation portion provides a vehicle lamp provided in the housing at a position facing the constriction region.
- the housing is provided with a ventilation portion at a position facing the constriction region. Therefore, the anti-fogging effect by the ventilation part directly reaches the constriction region. Therefore, it is possible to prevent the lens from being fogged in the stenosis region, and to quickly remove the fog generated from the lens in the stenosis region. As a result, the fogging of the lens can be prevented overall and effectively.
- FIG. 1 is a front perspective view of a vehicle lamp according to a first embodiment of the present invention.
- 1 is a rear perspective view of the vehicle lamp shown in FIG. Schematic cross-sectional view along the line III-III of the vehicle lamp shown in FIGS.
- the vehicle lamp 100 includes a plurality of light sources 10, a lens 20, and a housing 30.
- the lens 20 is disposed in front of the light source 10.
- the lens 10 and the housing 30 are combined with each other to form a lamp space 50.
- the light source 10 is disposed in the lamp space 50.
- the vehicle lamp 100 is a tail lamp, and more specifically, a combination lamp including a tail lamp, a stop lamp, and a turn signal lamp.
- the light source 10 is an LED bulb.
- the light source 10 is appropriately selected according to the application of the vehicle lamp 100.
- the lens 20 is a member made of a resin having a property of transmitting visible light, for example, an acrylic resin.
- Housing 30 is made of polypropylene (PP), polybutylene terephthalate (PBT), acrylic-styrene-acrylonitrile copolymer (ASA), acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), PC / ABS alloy, etc. It is a member made of a thermoplastic resin. For example, sputtering plating is performed on the surface of the housing 30 for the purpose of reflecting light and improving the design.
- the lens 20 and the housing 30 can each be manufactured by injection molding. Another member such as a reflector may be disposed in the lamp space 50.
- the housing 30 is provided with a plurality of ventilation portions 40 and 42. Specifically, the housing 30 is provided with a plurality of first ventilation portions 40 and a plurality of second ventilation portions 42. However, the number of the first ventilation portions 40 is not particularly limited, and only one first ventilation portion 40 may be provided in the housing 30.
- the first ventilation part 40 is a ventilation film including a resin porous film, for example.
- the material for the resin porous membrane include a fluororesin porous body and a polyolefin porous body.
- the fluororesin include polytetrafluoroethylene, polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, and the like.
- Examples of the monomer constituting the polyolefin include ethylene, propylene, 4-methylpentene-1,1 butene and the like. Polyolefins obtained by polymerizing or copolymerizing these monomers alone can be used.
- the gas permeable membrane may have a reinforcing layer laminated on the resin porous membrane.
- An example of the reinforcing layer is a nonwoven fabric made of a resin such as polyethylene.
- the ventilation film as the first ventilation portion 40 is attached to the housing 30 so as to close the ventilation hole 30h formed in the housing 30.
- the gas permeable membrane is welded to the housing 30 by a welding method such as thermal welding or ultrasonic welding.
- the gas permeable membrane may be attached to the housing 30 using an adhesive or a double-sided tape. In such a configuration, the protruding amount of the first ventilation part 40 from the back surface of the housing 30 is small, and the volume of the space occupied by the first ventilation part 40 is small.
- the first ventilation part 40 may be a cap seal type ventilation member (see Japanese Patent Application Laid-Open No. 2001-143524) or a snap fit type of ventilation member (see Japanese Patent Application Laid-Open No. 2007-141629).
- a screw type ventilation member see Japanese Patent Application Laid-Open No. 2004-47425. That is, the type of ventilation member that can be used as the first ventilation portion 40 is not particularly limited. However, according to the present embodiment, as described above, the problem of occupied space can be overcome.
- the lamp space 50 includes a constricted region 50a in which the distance between the lens 20 and the housing 30 is 10 mm or less (0.1 to 10 mm).
- the constriction region 50a is a portion of the lamp space 50 surrounded by a broken line in FIGS.
- the first ventilation portion 40 is provided in the housing 30 at a position facing the constriction region 50 a.
- the anti-fogging effect by the first ventilation part 40 directly reaches the constriction region 50a. Therefore, it is possible to prevent the lens 20 from being fogged in the constricted region 50a and to quickly remove the fog generated from the lens 20 in the constricted region 50a. As a result, fogging of the lens 20 can be prevented as a whole and effectively.
- the lens 20 and the housing 30 have side portions 20 a and 30 a that are located on the sides of the light source 10, respectively.
- the side surface portion 20a of the lens 20 and the side surface portion 30a of the housing 30 are portions extending in the front-rear direction on the side of the light source 10, respectively. “Front and back” mean the front and rear of the light source 10.
- Such side portions 20a and 30a are provided to adapt the vehicle lamp 100 to the shape of the corner portion of the vehicle, for example.
- a constricted region 50 a is included in a portion formed by the side surface portion 20 a of the lens 20 and the side surface portion 30 a of the housing 30.
- the side surface portion 30a of the housing 30 has a curved surface shape.
- the first ventilation portion 40 has a curved surface shape that follows the side surface portion 30 a of the housing 30. That is, the ventilation surface (surface related to ventilation) of the first ventilation part 40 is a curved surface. According to such a structure, the protrusion height of the 1st ventilation part 40 from the side part 30a of the housing 30 can be suppressed to the minimum.
- the side part 30a of the housing 30 may have a planar shape, and in this case, it is desirable that the first ventilation part 40 also has a planar shape.
- the second ventilation portion 42 is a so-called cap seal type ventilation member.
- a cap seal type ventilation member is well known to those skilled in the art as described in, for example, Japanese Patent Application Laid-Open No. 2001-143524.
- the second ventilation portion 42 is also attached to the housing 30 so as to close the ventilation hole formed in the housing 30.
- the plurality of second ventilation portions 42 are all provided in the housing 30 at positions facing the regions other than the constricted region 50 a in the lamp space 50.
- the ventilation member as the second ventilation portion 42 includes a cover, a cylindrical body, and a ventilation film.
- the cover is a cylindrical member having a bottom.
- the cylindrical body is made of an elastomer.
- the gas permeable membrane is attached to the cylindrical body so as to block one opening of the cylindrical body.
- the cylindrical body is fitted into the cover so that the gas permeable membrane is protected by the cover.
- a ventilation path is formed between the inner peripheral surface of the cover and the outer peripheral surface of the cylindrical body, and a ventilation path is formed between the bottom surface of the cover and the surface of the ventilation film.
- Such a ventilation member is attached to the nozzle-like portion of the housing 30.
- the nozzle-like portion is a portion having a vent hole.
- the type of ventilation member that can be used as the second ventilation portion 42 is not particularly limited.
- the second ventilation part 42 is not essential, and only the first ventilation part 40 may be provided in the housing 30. However, if the second ventilation portion 42 is provided in the housing 30 in addition to the first ventilation portion 40, the fogging of the lens 20 can be more effectively prevented or removed.
- the number of second ventilation portions 42 is not particularly limited, and only one second ventilation portion 42 may be provided in the housing 30.
- the vehicle lamp 200 according to the present embodiment includes a first ventilation part 140 and a plurality of second ventilation parts 42. Except for the first ventilation part 140, the structure of the vehicle lamp 200 is the same as the structure of the vehicle lamp 100 of the first embodiment. Therefore, elements common to the vehicle lamp 100 of the first embodiment and the vehicle lamp 200 of the present embodiment are denoted by the same reference numerals, and description thereof may be omitted. That is, the description regarding each embodiment can be applied mutually as long as there is no technical contradiction. Furthermore, as long as there is no technical contradiction, each embodiment may be combined with each other.
- the housing 30 may be a member made of a thermoplastic resin such as polypropylene.
- the 1st ventilation part 140 is formed with the porous body of the thermoplastic resin, and is integrated with the housing 30 as a part which forms the constriction area
- the first ventilation part 140 is formed of a porous body having appropriate rigidity.
- a porous body examples include an ultrahigh molecular weight polyethylene porous body.
- the ultra-high molecular weight polyethylene porous body having a desired shape can be obtained by cutting a sintered body of ultra-high molecular weight polyethylene powder. That is, it is relatively easy to impart a desired shape (three-dimensional shape) to the ultrahigh molecular weight polyethylene porous body or to provide a sufficient thickness. Therefore, the ultra-high molecular weight polyethylene porous body is a material suitable for the first ventilation portion 140.
- the “ultra high molecular weight polyethylene” means, for example, polyethylene having an average molecular weight of 500,000 or more (or 1,000,000 or more).
- the average molecular weight of ultra high molecular weight polyethylene is typically in the range of 2 to 10 million.
- An average molecular weight can be measured by the method prescribed
- the first ventilation part 140 may be a porous body obtained through a pelletizing process, an injection molding process, and an extraction process described below.
- a mixture containing pentaerythritol, polybutylene terephthalate resin, and one kind selected from polyfunctional alcohol, polyethylene glycol, and polypropylene glycol that is liquid at room temperature is melt-mixed at 200 to 235 ° C. and extruded.
- the injection molding step is a step of obtaining a molded product by an injection molding method using the pellets obtained in the pelletizing step.
- the extraction process is a process of extracting the water-soluble component by immersing the molded product obtained in the injection molding process in water or hot water.
- the porous body obtained by this method has appropriate rigidity and can be used as a structural material. In addition, since the porous body obtained by this method is obtained by injection molding, the degree of freedom in shape is very high.
- the method for integrating the first ventilation part 140 with the housing 30 is not particularly limited.
- the porous body as the first ventilation portion 140 can be integrated with the resin forming the housing 30 by a molding method such as insert molding, in-mold molding, or two-color molding.
- the porous body as the first ventilation portion 140 is obtained by a molding method such as a cutting method or an injection molding method.
- the porous body as the first ventilation portion 140 may be welded to the housing 30 or attached to the housing 30 using an adhesive or a double-sided tape. Also good.
- the housing 30 has the side surface portion 30 a located on the side of the light source 10.
- the side part 30a of the housing 30 has a curved surface shape.
- the first ventilation portion 140 also has a curved surface shape that follows the side surface portion 30 a of the housing 30. According to such a structure, the protrusion height of the 1st ventilation part 140 from the side part 30a of the housing 30 can be suppressed to the minimum.
- at least one main surface (front surface and / or back surface) of the housing 30 and at least one main surface (front surface and / or back surface) of the first ventilation portion 140 may be smoothly connected.
- the first ventilation part 140 may have the same thickness as the side part 30 a of the housing 30.
- the structure and position of the second ventilation part 42 are as described in the first embodiment. Similar to the first embodiment, the second ventilation portion 42 is not essential.
- an opening (opening area 300 mm 2 ) was formed in the housing.
- An ultra-high molecular weight polyethylene porous body manufactured by Nitto Denko, Sunmap (registered trademark), thickness 2.0 mm
- Nitto Denko, Sunmap registered trademark
- thickness 2.0 mm is fixed to the housing with a double-sided tape (Nitto Denko, No. 5000NS) so as to close the opening. did.
- the openings other than the opening at position A were closed with tape.
- the housing and the lens were combined to obtain the vehicle lamp of the example.
- Comparative Example 1 At three positions B shown in FIG. 5, a rubber tube (length 30 mm) was attached to the housing. That is, the cap seal type ventilation member at position B was replaced with a rubber tube. The total opening area of the rubber tube was 58.9 mm 2 . Openings other than the opening at position B were closed with tape. The housing and the lens were combined to obtain a vehicle lamp of Comparative Example 1.
- Comparative Example 2 At three positions B and C shown in FIG. 5, a rubber tube (length 30 mm) was attached to the housing. That is, the cap seal type ventilation member at the positions B and C was replaced with a rubber tube. The total opening area of the rubber tube was 117.8 mm 2 . Openings other than the openings at positions B and C were closed with tape. The housing and the lens were combined to obtain a vehicle lamp of Comparative Example 2.
- vehicle lamps such as a headlamp, fog lamp, cornering lamp, tail lamp, stop lamp, backup lamp, turn signal lamp, and daytime running lamp.
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- Engineering & Computer Science (AREA)
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
光源と、
前記光源の前方に配置されたレンズと、
前記レンズに組み合わされて、前記光源が配置されたランプ空間を形成しているハウジングと、
前記ランプ空間の通気のために前記ハウジングに設けられた通気部と、
を備え、
前記ランプ空間は、前記レンズと前記ハウジングとの距離が10mm以下である狭窄領域を含み、
前記通気部は、前記狭窄領域に面する位置において前記ハウジングに設けられている、車両用ランプを提供する。
図1~図3に示すように、本実施形態に係る車両用ランプ100は、複数の光源10、レンズ20及びハウジング30を備えている。レンズ20は、光源10の前方に配置されている。レンズ10及びハウジング30は、互いに組み合わされてランプ空間50を形成している。ランプ空間50に光源10が配置されている。本実施形態において、車両用ランプ100はテールランプであり、詳細には、テールランプ、ストップランプ及びターンシグナルランプを含むコンビネーションランプである。
図4に示すように、本実施形態に係る車両用ランプ200は、第1通気部140及び複数の第2通気部42を備えている。第1通気部140を除き、車両用ランプ200の構造は、第1実施形態の車両用ランプ100の構造と同じである。従って、第1実施形態の車両用ランプ100と本実施形態の車両用ランプ200とで共通する要素には同じ参照符号を付し、それらの説明を省略することがある。すなわち、各実施形態に関する説明は、技術的に矛盾しない限り、相互に適用されうる。さらに、技術的に矛盾しない限り、各実施形態は、相互に組み合わされてもよい。
図5に示す位置Aにおいて、ハウジングに開口部(開口面積300mm2)を形成した。その開口部を塞ぐように、ハウジングに超高分子量ポリエチレン多孔体(日東電工社製、サンマップ(登録商標)、厚さ2.0mm)を両面テープ(日東電工社製、No.5000NS)で固定した。位置Aの開口部以外の開口部はテープで塞いだ。このハウジングとレンズとを組み合わせ、実施例の車両用ランプを得た。
図5に示す3つの位置Bにおいて、ハウジングにゴムチューブ(長さ30mm)を取り付けた。つまり、位置Bにおけるキャップシールタイプの通気部材をゴムチューブに置き換えた。ゴムチューブの開口面積の合計は58.9mm2であった。位置Bの開口部以外の開口部はテープで塞いだ。このハウジングとレンズとを組み合わせ、比較例1の車両用ランプを得た。
図5に示す3つの位置B及び3つの位置Cにおいて、ハウジングにゴムチューブ(長さ30mm)を取り付けた。つまり、位置B及び位置Cにおけるキャップシールタイプの通気部材をゴムチューブに置き換えた。ゴムチューブの開口面積の合計は117.8mm2であった。位置B及び位置Cの開口部以外の開口部はテープで塞いだ。このハウジングとレンズとを組み合わせ、比較例2の車両用ランプを得た。
図5に示す2つの位置Dのそれぞれにおいて、ハウジングに開口部(合計の開口面積300mm2)を形成した。それらの開口部を塞ぐように、ハウジングに超高分子量ポリエチレン多孔体(日東電工社製、サンマップ(登録商標)、厚さ2.0mm)を両面テープ(日東電工社製、No.5000NS)によって固定した。位置Dの開口部以外の開口部はテープで塞いだ。このハウジングとレンズとを組み合わせ、比較例3の車両用ランプを得た。
実施例及び比較例の車両用ランプの曇り除去試験を以下の方法で実施した。まず、バルブなどの部品を全て外した状態で車両用ランプを40℃、90%RHの雰囲気の恒温槽に2時間入れた。ランプを恒温槽から出し、バルブなどの部品を素早く取り付けてランプ空間を密閉した。次に、全てのライトを10分間点灯させた後、全てのライトを消灯させた。次に、5℃の水をレンズの外面に30秒間かけた。その後、全てのライトを点灯させた。ライトの再点灯後、レンズの内面に生じた曇りが完全に消失するまでの時間を計測した。結果を表1に示す。
Claims (7)
- 光源と、
前記光源の前方に配置されたレンズと、
前記レンズに組み合わされて、前記光源が配置されたランプ空間を形成しているハウジングと、
前記ランプ空間の通気のために前記ハウジングに設けられた通気部と、
を備え、
前記ランプ空間は、前記レンズと前記ハウジングとの距離が10mm以下である狭窄領域を含み、
前記通気部は、前記狭窄領域に面する位置において前記ハウジングに設けられている、車両用ランプ。 - 前記通気部は、樹脂多孔質膜を含む通気膜であり、
前記通気膜は、前記ハウジングに形成された通気孔を塞ぐように前記ハウジングに取り付けられている、請求項1に記載の車両用ランプ。 - 前記ハウジングは、熱可塑性樹脂で作られた部品であり、
前記通気部は、熱可塑性樹脂の多孔体によって形成されており、前記狭窄領域を形成する部分として前記ハウジングに一体化されている、請求項1に記載の車両用ランプ。 - 前記レンズ及び前記ハウジングは、それぞれ、前記光源の側方に位置している側面部を有し、
前記ランプ空間のうち、前記レンズの前記側面部及び前記ハウジングの前記側面部によって形成された部分に前記狭窄領域が含まれている、請求項1に記載の車両用ランプ。 - 前記ハウジングは、前記光源の側方に位置している側面部を有し、
前記ハウジングの前記側面部は、曲面形状を有し、
前記通気部は、前記ハウジングの前記側面部に追従する曲面形状を有している、請求項1に記載の車両用ランプ。 - 前記通気部を第1通気部と定義したとき、
前記ランプ空間の前記狭窄領域以外の領域に面する位置において前記ハウジングに設けられた第2通気部をさらに備えた、請求項1に記載の車両用ランプ。 - 前記通気部は、超高分子量ポリエチレンの粉末の焼結体を切削することによって得られる超高分子量ポリエチレン多孔体である、請求項1に記載の車両用ランプ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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CN201580015691.5A CN106133436B (zh) | 2014-03-24 | 2015-02-25 | 车辆用灯 |
US15/128,341 US10036524B2 (en) | 2014-03-24 | 2015-02-25 | Vehicle lamp |
EP15768760.9A EP3128224B1 (en) | 2014-03-24 | 2015-02-25 | Lamp for vehicle |
KR1020167029097A KR102322587B1 (ko) | 2014-03-24 | 2015-02-25 | 차량용 램프 |
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JP2014-059866 | 2014-03-24 | ||
JP2014059866A JP6438665B2 (ja) | 2014-03-24 | 2014-03-24 | 車両用ランプ |
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WO2015145970A1 true WO2015145970A1 (ja) | 2015-10-01 |
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US (1) | US10036524B2 (ja) |
EP (1) | EP3128224B1 (ja) |
JP (1) | JP6438665B2 (ja) |
KR (1) | KR102322587B1 (ja) |
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KR101885138B1 (ko) * | 2016-12-14 | 2018-08-03 | (주)코멤텍 | 통기성 캡 |
FR3066139B1 (fr) | 2017-05-15 | 2020-12-04 | Automotive Lighting Rear Lamps France | Procede de fabrication d'une coque comprenant un film decoratif |
CN108534092A (zh) * | 2018-03-19 | 2018-09-14 | 东莞市海默生电子有限公司 | 一种用于叉车的led前组合大灯 |
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Also Published As
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CN106133436A (zh) | 2016-11-16 |
US10036524B2 (en) | 2018-07-31 |
EP3128224A4 (en) | 2017-12-06 |
KR20160138151A (ko) | 2016-12-02 |
CN106133436B (zh) | 2019-08-27 |
EP3128224B1 (en) | 2021-05-05 |
JP6438665B2 (ja) | 2018-12-19 |
US20170122521A1 (en) | 2017-05-04 |
JP2015185316A (ja) | 2015-10-22 |
KR102322587B1 (ko) | 2021-11-04 |
EP3128224A1 (en) | 2017-02-08 |
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