JP2004273210A - Method of manufacturing lighting fixture for vehicle - Google Patents

Method of manufacturing lighting fixture for vehicle Download PDF

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Publication number
JP2004273210A
JP2004273210A JP2003060230A JP2003060230A JP2004273210A JP 2004273210 A JP2004273210 A JP 2004273210A JP 2003060230 A JP2003060230 A JP 2003060230A JP 2003060230 A JP2003060230 A JP 2003060230A JP 2004273210 A JP2004273210 A JP 2004273210A
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JP
Japan
Prior art keywords
lens
housing
lamp
contact surface
manufacturing
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.)
Pending
Application number
JP2003060230A
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Japanese (ja)
Inventor
Shinya Watanabe
紳也 渡辺
Misao Yamamoto
操 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
Toyota Motor Corp
Original Assignee
Koito Manufacturing Co Ltd
Toyota Motor Corp
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Publication date
Application filed by Koito Manufacturing Co Ltd, Toyota Motor Corp filed Critical Koito Manufacturing Co Ltd
Priority to JP2003060230A priority Critical patent/JP2004273210A/en
Publication of JP2004273210A publication Critical patent/JP2004273210A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
    • B29C65/1667—Laser beams characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous laser welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/747—Lightning equipment

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a lighting fixture for a vehicle enhancing outward appearance, and reducing component costs of joining members and assembling man-hours. <P>SOLUTION: The method of manufacturing the lighting fixture for the vehicle is such that a lens 2, a housing 1 holding the lens 2, and a lamp bezel 3 installed in an inner space formed with the lens 2 and the housing 1 are joined, and laser beams emitted from one laser beam source are simultaneously irradiated to the contact surface of the lens 2 and the housing 1 and the contact surface of the lens 2 and the lamp bezel3 to integrally join the lens 2, the housing 1, and the lamp bezel 3. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、レンズと、レンズを保持するハウジングと、レンズとハウジングで形成される内部空間に設けられる灯具内部部材と、を接合する車両用灯具の製造方法に関する。
【０００２】
【従来の技術】
従来より、レンズと、レンズを保持するハウジングと、をレーザ溶着によって接合する車両用灯具の製造方法が知られている（例えば、特許文献１参照）。この車両用灯具の製造方法は、レンズに形成された脚部の先端面とハウジングに形成された受け面との当接面にレーサ光を照射することによってレーザ溶着をしてレンズとハウジングを接合するものである。このようなレーザ溶着によるレンズとハウジングの接合を採用することによって、レンズとハウジングの接合面の両側にバリをほとんど発生させることがなくレンズとハウジングを接合することができる。従って、レンズとハウジングの接合面周辺の外観品質を高めることができる。
【０００３】
【特許文献１】
特開２００１−２４３８１１号公報
【０００４】
【発明が解決しようとする課題】
しかしながら、上述の従来技術では、レーザ溶着によって接合するのはレンズとハウジングのみであって、ハウジング及び光源バルブの構成部品等が外部から露見されないようにハウジング前部に設けられるランプベゼル、インナーレンズ及びリフレクタ等の灯具内部部材については、レンズ又はハウジングへ締結部材によって取り付けている。このため、レンズは透明であるので外部から締結部材が露見されて見栄えがよくなく、また、締結部材の部品費及び組立工数が嵩むという問題点がある。
【０００５】
本発明は、このような状況を鑑みてなされたもので、外部からの見栄えをよくすると共に締結部材の部品費及び組立工数を削減することができる車両用灯具の製造方法を提供することを目的とする。
【０００６】
【課題を解決するための手段】
前述の課題を解決するため、本発明に係る車両用灯具の製造方法は、次のような手段を採用する。
【０００７】
即ち、請求項１記載の発明は、レンズと、該レンズを保持するハウジングと、前記レンズと前記ハウジングで形成される内部空間に設けられる灯具内部部材とを接合する車両用灯具の製造方法であって、前記レンズと前記ハウジングの当接面、及び前記レンズ又は前記ハウジングと前記灯具内部部材の当接面へ一のレーザ光源から出射するレーザ光を同時に照射して、前記レンズ、前記ハウジング及び前記灯具内部部材を一体的に接合することを特徴とする。
【０００８】
請求項１記載の発明によれば、レンズとハウジングの当接面、及びレンズ又はハウジングと灯具内部部材の当接面へ一のレーザ光源から出射するレーザ光を同時に照射することによって、レンズ、ハウジング及び灯具内部部材が一体的に接合される。これによって、灯具内部部材をレンズ又はハウジングへ取り付ける締結部材を削減することができて、外部からの見栄えがよくなると共に締結部材の部品費及び組立工数を削減することができる。
【０００９】
【発明の実施の形態】
以下、本発明に係る車両用灯具の製造方法の実施の形態を図面に基づいて説明する。
【００１０】
図１及び図２は、本発明に係る車両用灯具の製造方法の実施形態を説明するものである。
【００１１】
図１は、本実施形態に係る車両用灯具の側断面図である。図２は、図１におけるＡ部の拡大図である。本実施形態に係る車両用灯具は、ハウジング１と、レンズ２と、ランプベゼル３、光源バルブ４から概略構成されている。
【００１２】
ハウジング１は、前面を開口して内部空間を有するように形成されている。ハウジング１の後面には、光源バルブ４を挿着するための孔が設けられている。ハウジング１の前端面は、例えば、内側から外側に向けて内側が前方となるようにテーパ状に形成される。ハウジング１の材質としては、レーザ光を吸収して溶融するものであればよく、例えば、樹脂であるＡＢＳ（アクリロニトリル・ブタジエン・スチレンポリマー）が用いられる。ハウジング１は、レンズ２を保持すると共に、車体に固定される。
【００１３】
レンズ２は、ハウジング１の前面を覆うように形成されている。レンズ２の端面は、例えば、ハウジング１の前端面と合致して当接するように、内側から外側に向けて内側が前方となるようにテーパ状に形成される。レンズ２の材質としては、透明であってレーザ光を透過するものであればよく、例えば、樹脂であるＰＣ（ポリカーボネート）が用いられる。
【００１４】
ランプベゼル３は、ハウジング１及び光源バルブ４の構成部品等が外部から露見されないようにするためのものであって、ハウジング１とレンズ２が接合された場合に形成される内部空間でハウジング１前部に設けられている。ランプベゼル３は、外側端面がレンズ２の端部内面と当接するように形成されている。ランプベゼル３の中央部には、光源バルブ４が挿通する孔が形成されている。ランプベゼル３の材質としては、レーザ光を吸収して溶融するものであればよく、例えば、樹脂であるアクリルが用いられる。
【００１５】
次に、本実施形態に係る車両用灯具の製造方法について説明する。
【００１６】
最初に、ハウジング１の前端面とレンズ２の端面、及びレンズ２の端部内面とランプベゼル３の外側端面が当接するように、ハウジング１、レンズ２及びランプベゼル３を位置決めする。
【００１７】
次いで、ハウジング１の前端面とレンズ２の端面の当接面１ａ、及びレンズ２の端部内面とランプベゼル３の外側端面の当接面３ａへ一のレーザ光源から出射されるレーザ光を同時に照射する。レーザ光は、ハウジング１の前端面とレンズ２の端面の当接面１ａ、及びレンズ２の端部内面とランプベゼル３の外側端面の当接面３ａへレンズ２側から斜めに照射される。尚、レーザ光としては、例えば、半導体レーザが用いられる。また、レーザ光のスポット径（Ｗ）は、例えば、φ２ｍｍ乃至φ５ｍｍである。
【００１８】
レーザ光は、レンズ２を透過してハウジング１の前端面とレンズ２の端面の当接面１ａ、及びレンズ２の端部内面とランプベゼル３の外側端面の当接面３ａへ照射される。これによって、当接面１ａのハウジング１及び当接面３ａのランプベゼル３が溶融して、ハウジング１とレンズ２及びランプベゼル３とレンズ２が溶着され、ハウジング１、レンズ２及びランプベゼルが一体的に接合される。
【００１９】
尚、ランプベゼル３の代わりに又は同時にインナーレンズ、リフレクタ、レンズカバー等の灯具内部部材をレンズ２へレーザ溶着してもよい。
【００２０】
本実施形態に係る車両用灯具の製造方法によれば、ランプベゼル３はハウジング１とレンズ２がレーザ溶着によって接合される際に同時にレンズ２にレーザ溶着によって接合されるため、ランプベゼル３をハウジング１又はレンズ２へ取り付ける締結部材を削除することができて、外部からの見栄えがよくなると共に締結部材の部品費及び組立工数を削減することができる。
【００２１】
また、レーザ溶着されるハウジング１の前端面とレンズ２の端面の当接面１ａ、及びレンズ２の端部内面とランプベゼル３の外側端面の当接面３ａを近接又はハウジング１へランプベゼル３が若しくはランプベゼル３へハウジング１がオーバーラップするように設けた場合には、レーザ光によって溶融されたハウジング１とランプベゼル３が溶着するため、より強固にハウジング１、レンズ２及びランプベゼル３を一体的に接合することができる。
【００２２】
尚、本実施形態においては、ランプベゼル３が特許請求の範囲に記載した「灯具内部部材」に相当している。
【００２３】
尚、本実施形態においては、ランプベゼル３等の灯具内部部材をレンズ２へレーザ溶着することとしているが、ランプベゼル３等の灯具内部部材をハウジング１へレーザ溶着できるようにハウジング１、レンズ２及びランプベゼル３等の灯具内部部材を構成して、ハウジング１の前端面とレンズ２の端面の当接面、及びハウジング１の前端部内面とランプベゼル３等の灯具内部部材の外側端面の当接面へ一のレーザ光源から出射されるレーザ光を同時に照射し、ハウジング１、レンズ２及びランプベゼル３等の灯具内部部材を一体的に接合するようにしてもよい。
【００２４】
また、ハウジング１、ランプベゼル３、及びインナーレンズ、レフレクタ、レンズカバー等の灯具内部部材を一のレーザ光源から出射されるレーザ光によって一体的に同時にレーザ溶着できるように構成して接合するようにしてもよい。
【００２５】
【発明の効果】
以上のように、請求項１記載の発明によれば、灯具内部部材をレンズ又はハウジングへ取り付ける締結部材を削減することができて、外部からの見栄えがよくなると共に締結部材の部品費及び組立工数を削減することができる。
【図面の簡単な説明】
【図１】本発明の実施形態に係る車両用灯具の側断面図である。
【図２】図１におけるＡ部の拡大図である。
【符号の説明】
１ ハウジング
２ レンズ
３ ランプベゼル[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of manufacturing a vehicular lamp for joining a lens, a housing for holding the lens, and a lamp internal member provided in an internal space formed by the lens and the housing.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a method of manufacturing a vehicular lamp in which a lens and a housing holding the lens are joined by laser welding (for example, see Patent Document 1). In this method for manufacturing a vehicle lamp, laser welding is performed by irradiating laser light to a contact surface between a tip end surface of a leg formed on a lens and a receiving surface formed on a housing to join the lens and the housing. Is what you do. By adopting the joining of the lens and the housing by such laser welding, the lens and the housing can be joined with almost no burrs on both sides of the joining surface of the lens and the housing. Therefore, the appearance quality around the joint surface between the lens and the housing can be improved.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2001-243811
[Problems to be solved by the invention]
However, in the above-described conventional technology, only the lens and the housing are joined by laser welding, and the lamp bezel, the inner lens, and the lamp are provided at the front of the housing so that components of the housing and the light source bulb are not exposed from the outside. A lamp internal member such as a reflector is attached to a lens or a housing by a fastening member. For this reason, since the lens is transparent, the fastening member is exposed from the outside and the appearance is not good, and the parts cost and the number of assembly steps of the fastening member are increased.
[0005]
The present invention has been made in view of such a situation, and an object of the present invention is to provide a method of manufacturing a vehicular lamp capable of improving the external appearance and reducing the parts cost and the number of assembly steps of a fastening member. And
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a method for manufacturing a vehicular lamp according to the present invention employs the following means.
[0007]
That is, the invention according to claim 1 is a method for manufacturing a vehicular lamp for joining a lens, a housing for holding the lens, and a lamp internal member provided in an internal space formed by the lens and the housing. Simultaneously irradiating the contact surface between the lens and the housing, and the contact surface between the lens or the housing and the internal member of the lamp with laser light emitted from one laser light source, and thereby irradiating the lens, the housing and the The lamp interior member is integrally joined.
[0008]
According to the first aspect of the present invention, by simultaneously irradiating the laser light emitted from one laser light source to the contact surface between the lens and the housing and the contact surface between the lens or the housing and the internal member of the lamp, the lens and the housing are simultaneously irradiated. And the lamp internal member is integrally joined. Thereby, the number of fastening members for attaching the lamp internal member to the lens or the housing can be reduced, and the external appearance can be improved, and the cost and the number of assembly steps of the fastening member can be reduced.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a method for manufacturing a vehicular lamp according to the present invention will be described with reference to the drawings.
[0010]
1 and 2 illustrate an embodiment of a method for manufacturing a vehicular lamp according to the present invention.
[0011]
FIG. 1 is a side sectional view of a vehicle lamp according to the present embodiment. FIG. 2 is an enlarged view of a portion A in FIG. The vehicular lamp according to the present embodiment includes a housing 1, a lens 2, a lamp bezel 3, and a light source bulb 4.
[0012]
The housing 1 is formed to have an internal space with an open front surface. A hole for inserting the light source bulb 4 is provided on the rear surface of the housing 1. The front end surface of the housing 1 is formed in a tapered shape such that the inside is forward from the inside toward the outside. The material of the housing 1 may be any material that absorbs laser light and melts. For example, ABS (acrylonitrile-butadiene-styrene polymer), which is a resin, is used. The housing 1 holds the lens 2 and is fixed to the vehicle body.
[0013]
The lens 2 is formed so as to cover the front surface of the housing 1. The end face of the lens 2 is formed in a tapered shape so that the inside faces outward from the inside so as to be in contact with, for example, the front end face of the housing 1. As a material of the lens 2, any material may be used as long as it is transparent and transmits a laser beam. For example, PC (polycarbonate) which is a resin is used.
[0014]
The lamp bezel 3 is provided to prevent the components of the housing 1 and the light source bulb 4 from being exposed from the outside. The lamp bezel 3 has an internal space formed when the housing 1 and the lens 2 are joined to each other. Section. The lamp bezel 3 is formed such that the outer end surface is in contact with the inner surface of the end of the lens 2. At the center of the lamp bezel 3, a hole through which the light source bulb 4 is inserted is formed. As a material of the lamp bezel 3, any material may be used as long as it absorbs laser light and melts, and for example, acrylic which is a resin is used.
[0015]
Next, a method for manufacturing the vehicle lamp according to the present embodiment will be described.
[0016]
First, the housing 1, the lens 2, and the lamp bezel 3 are positioned such that the front end surface of the housing 1 and the end surface of the lens 2, and the inner end surface of the lens 2 and the outer end surface of the lamp bezel 3 are in contact.
[0017]
Next, the laser light emitted from one laser light source is simultaneously transmitted to the contact surface 1a between the front end surface of the housing 1 and the end surface of the lens 2 and the contact surface 3a between the inner end surface of the lens 2 and the outer end surface of the lamp bezel 3. Irradiate. The laser light is obliquely applied from the lens 2 side to the contact surface 1a between the front end surface of the housing 1 and the end surface of the lens 2 and the contact surface 3a between the inner end surface of the lens 2 and the outer end surface of the lamp bezel 3. Note that, for example, a semiconductor laser is used as the laser light. The spot diameter (W) of the laser light is, for example, φ2 mm to φ5 mm.
[0018]
The laser beam passes through the lens 2 and is applied to the contact surface 1a between the front end surface of the housing 1 and the end surface of the lens 2 and the contact surface 3a between the inner end surface of the lens 2 and the outer end surface of the lamp bezel 3. Thereby, the housing 1 of the contact surface 1a and the lamp bezel 3 of the contact surface 3a are melted, and the housing 1 and the lens 2 and the lamp bezel 3 and the lens 2 are welded, and the housing 1, the lens 2 and the lamp bezel are integrated. Are joined together.
[0019]
Instead of or simultaneously with the lamp bezel 3, a lamp internal member such as an inner lens, a reflector, and a lens cover may be laser-welded to the lens 2.
[0020]
According to the method for manufacturing a vehicle lamp according to the present embodiment, the lamp bezel 3 is joined to the lens 2 by laser welding at the same time that the housing 1 and the lens 2 are joined by laser welding. Since the fastening member attached to the lens 1 or the lens 2 can be omitted, the external appearance can be improved, and the parts cost and the number of assembly steps of the fastening member can be reduced.
[0021]
The contact surface 1a between the front end surface of the housing 1 and the end surface of the lens 2 to be laser-welded, and the contact surface 3a between the inner end surface of the lens 2 and the outer end surface of the lamp bezel 3 are close to or closer to the housing 1. When the housing 1 is provided so as to overlap the lamp bezel 3, the housing 1, the lens 2 and the lamp bezel 3 are more firmly connected because the housing 1 and the lamp bezel 3 fused by the laser beam are welded. They can be joined together.
[0022]
In the present embodiment, the lamp bezel 3 corresponds to a “lamp interior member” described in the claims.
[0023]
In this embodiment, the lamp inner member such as the lamp bezel 3 is laser-welded to the lens 2. However, the housing 1 and the lens 2 are so welded that the lamp inner member such as the lamp bezel 3 can be laser-welded to the housing 1. And a lamp inner member such as a lamp bezel 3, and a contact surface between the front end surface of the housing 1 and the end surface of the lens 2, and a contact surface between the front inner surface of the housing 1 and the outer end surface of the lamp inner member such as the lamp bezel 3. The contact surface may be irradiated with laser light emitted from one laser light source at the same time, and the interior parts of the lamp such as the housing 1, the lens 2, and the lamp bezel 3 may be integrally joined.
[0024]
Further, the housing 1, the lamp bezel 3, and the internal members of the lamp such as the inner lens, the reflector, and the lens cover are integrally and simultaneously welded by laser light emitted from one laser light source so as to be joined. You may.
[0025]
【The invention's effect】
As described above, according to the first aspect of the present invention, the number of fastening members for attaching the lamp internal member to the lens or the housing can be reduced, the appearance from the outside is improved, and the cost and the number of assembly steps of the fastening member are reduced. Can be reduced.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a vehicular lamp according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a portion A in FIG.
[Explanation of symbols]
1 housing 2 lens 3 lamp bezel

Claims (1)

レンズと、該レンズを保持するハウジングと、前記レンズと前記ハウジングで形成される内部空間に設けられる灯具内部部材とを接合する車両用灯具の製造方法であって、
前記レンズと前記ハウジングの当接面、及び前記レンズ又は前記ハウジングと前記灯具内部部材の当接面へ一のレーザ光源から出射するレーザ光を同時に照射して、前記レンズ、前記ハウジング及び前記灯具内部部材を一体的に接合することを特徴とする車両用灯具の製造方法。A method for manufacturing a vehicle lamp for joining a lens, a housing for holding the lens, and a lamp internal member provided in an internal space formed by the lens and the housing,
The laser light emitted from one laser light source is simultaneously radiated to the contact surface of the lens and the housing, and the contact surface of the lens or the housing and the lamp internal member, to thereby irradiate the lens, the housing, and the interior of the lamp. A method for manufacturing a vehicular lamp, wherein members are integrally joined.
JP2003060230A 2003-03-06 2003-03-06 Method of manufacturing lighting fixture for vehicle Pending JP2004273210A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
JP2004273210A true JP2004273210A (en) 2004-09-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3453953A1 (en) * 2017-09-08 2019-03-13 PSA Automobiles SA Optical unit with peripheral holes for discharge of external fouling elements

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Publication number Priority date Publication date Assignee Title
JPH09510930A (en) * 1994-03-31 1997-11-04 マルクアルト ゲーエムベーハー Plastic work piece and method of manufacturing the same
JP2001243812A (en) * 2000-02-29 2001-09-07 Koito Mfg Co Ltd Lighting fixture for vehicle and its manufacturing method
JP2001243811A (en) * 2000-02-29 2001-09-07 Koito Mfg Co Ltd Lighting fixture for vehicle and manufacturing method of the same
JP2002292741A (en) * 2001-03-29 2002-10-09 Toyota Motor Corp Laser welding method for lighting fixture for vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09510930A (en) * 1994-03-31 1997-11-04 マルクアルト ゲーエムベーハー Plastic work piece and method of manufacturing the same
JP2001243812A (en) * 2000-02-29 2001-09-07 Koito Mfg Co Ltd Lighting fixture for vehicle and its manufacturing method
JP2001243811A (en) * 2000-02-29 2001-09-07 Koito Mfg Co Ltd Lighting fixture for vehicle and manufacturing method of the same
JP2002292741A (en) * 2001-03-29 2002-10-09 Toyota Motor Corp Laser welding method for lighting fixture for vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3453953A1 (en) * 2017-09-08 2019-03-13 PSA Automobiles SA Optical unit with peripheral holes for discharge of external fouling elements
FR3071034A1 (en) * 2017-09-08 2019-03-15 Psa Automobiles Sa OPTICAL BLOCK HAS PERIPHERAL HOLES FOR EXHAUSTING ELEMENTS REMOVAL.

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