JP2003123506A - Vehicular lamp and its laser welding method - Google Patents

Vehicular lamp and its laser welding method

Info

Publication number
JP2003123506A
JP2003123506A JP2001311304A JP2001311304A JP2003123506A JP 2003123506 A JP2003123506 A JP 2003123506A JP 2001311304 A JP2001311304 A JP 2001311304A JP 2001311304 A JP2001311304 A JP 2001311304A JP 2003123506 A JP2003123506 A JP 2003123506A
Authority
JP
Japan
Prior art keywords
outer lens
housing
laser
welding
contact surface
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.)
Granted
Application number
JP2001311304A
Other languages
Japanese (ja)
Other versions
JP3972621B2 (en
Inventor
Kenichi Asaka
賢一 浅香
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.)
Ichikoh Industries Ltd
Original Assignee
Ichikoh Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ichikoh Industries Ltd filed Critical Ichikoh Industries Ltd
Priority to JP2001311304A priority Critical patent/JP3972621B2/en
Publication of JP2003123506A publication Critical patent/JP2003123506A/en
Application granted granted Critical
Publication of JP3972621B2 publication Critical patent/JP3972621B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • 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
    • 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
    • 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
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    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
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    • 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
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • 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
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • B29C66/3452—Making complete joints by combining partial 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5342—Joining single elements to open ends of tubular or hollow articles or to the ends of bars a substantially flat extra element being placed between and clamped by the joined single elements and the end of said tubular or hollow articles
    • B29C66/53421—Joining single elements to open ends of tubular or hollow articles or to the ends of bars a substantially flat extra element being placed between and clamped by the joined single elements and the end of said tubular or hollow articles said substantially flat extra element being flexible, e.g. a membrane
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat 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
    • B29C66/541—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 a substantially flat extra element being placed between and clamped by the joined hollow-preforms
    • B29C66/5412—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 a substantially flat extra element being placed between and clamped by the joined hollow-preforms said substantially flat extra element being flexible, e.g. a membrane
    • 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
    • B29C66/541—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 a substantially flat extra element being placed between and clamped by the joined hollow-preforms
    • B29C66/5414—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 a substantially flat extra element being placed between and clamped by the joined hollow-preforms said substantially flat extra element being rigid, e.g. a plate
    • 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
    • B29C66/545—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 one hollow-preform being placed inside the other
    • 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
    • B29C66/61—Joining from or joining on the inside
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/723—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 structure of the material of the parts to be joined being multi-layered
    • 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
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

PROBLEM TO BE SOLVED: To surely fix an outer housing and an inner sheet to a housing with a simple work without being attended by deterioration of appearance quality caused by welding burrs and whitening. SOLUTION: The outer lens 2 is made of a transparent thermoplastic resin material, the housing 4 is made of a thermoplastic resin material which is absorbent of a laser beam 13, and the inner sheet 20 is made of the transparent thermoplastic resin material. The outer lens 2 is fixed to the housing 4 by laser-welding a part abutting on the opening part of the housing 4 throughout its entire circumference (welded surface 9a) by the laser beam 13 irradiated from the outer lens 2 side, and the inner sheet 20 is sandwiched between the outer lens 2 and the housing 4 while being fixed to the housing 4 by laser- welding the sandwiched part (welded surface 9b) by the laser beam 13 at least partially irradiated from the outer lens 2 side.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】この発明は、例えばリヤラン
プとして適用される、インナシート（フィルム）やイン
ナレンズ等の光透過部材を灯室内に設けた車両用灯具お
よびそのレーザ溶着方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp having a light transmitting member such as an inner sheet (film) or an inner lens, which is applied as a rear lamp, in a lamp chamber, and a laser welding method thereof.

【０００２】[0002]

【従来の技術】車両用灯具では、アウタレンズが、透明
な熱可塑性樹脂材で構成されると共に、ハウジングと共
働して灯室を画成するように前記ハウジングの開口部を
覆うようにして固定されている。2. Description of the Related Art In a vehicular lamp, an outer lens is made of a transparent thermoplastic resin and fixed so as to cover an opening of the housing so as to cooperate with the housing to define a lamp chamber. Has been done.

【０００３】また、インナシート（フィルム）は、見栄
え向上の模様付けを目的としてアウタレンズの裏面に接
近させて設けられており、インナレンズは、ランプの配
光制御と色付けを目的としてアウタレンズの後方に設け
られている。Further, an inner sheet (film) is provided close to the back surface of the outer lens for the purpose of patterning the appearance, and the inner lens is provided behind the outer lens for the purpose of controlling the light distribution of the lamp and coloring. It is provided.

【０００４】そして、アウタレンズのハウジングへの固
定手段としては、振動溶着、超音波溶着等に代表される
溶着が短時間で接合が可能であり、接着剤やねじ等の金
属部品を使用しないので、それにかかるコストや重量
増、環境汚染らの問題が発生しないことから、主流にな
りつつある。図６は、アウタレンズ２のハウジング４へ
の固定状態を示す。As a means for fixing the outer lens to the housing, welding represented by vibration welding, ultrasonic welding, etc. can be joined in a short time, and no metal parts such as adhesives and screws are used. It is becoming the mainstream because it does not cause problems such as cost, weight increase and environmental pollution. FIG. 6 shows a state where the outer lens 2 is fixed to the housing 4.

【０００５】また、インナシート２０は、図７に示すよ
うに、両面テープ１５を介してアウタレンズ２の裏面側
に貼り付けられる。すなわち、インナシート２０は、ア
ウタレンズ２の裏面に直接貼着される両面テープ１５を
介して貼り付けられる（図７（ａ））か、またはアウタ
レンズ２の環状リブ３に貼着される両面テープ１５を介
して貼り付けられる（図７（ｂ））。The inner sheet 20 is attached to the back surface side of the outer lens 2 via a double-sided tape 15 as shown in FIG. That is, the inner sheet 20 is attached via the double-sided tape 15 directly attached to the back surface of the outer lens 2 (FIG. 7A), or the double-sided tape 15 attached to the annular rib 3 of the outer lens 2. It is affixed through (FIG.7 (b)).

【０００６】また、インナレンズ２１は、図８に示すよ
うに、インナレンズ２１に設けたランス１６によりラン
ス係合させると共に、がたつきやはずれを防止するため
にさらにスクリュー１７止めして取り付けられている。Further, as shown in FIG. 8, the inner lens 21 is mounted with a lance 16 provided on the inner lens 21, and further fixed with a screw 17 to prevent rattling and disengagement. ing.

【０００７】[0007]

【発明が解決しようとする課題】しかしながら、振動溶
着や超音波溶着は、図６に示すように、アウタレンズ２
の環状リブ３の先端とハウジング４の平坦面との溶着と
なり、溶着部付近に溶着バリや糸引き５が現出するばか
りでなく、この部分Ｔが広いダミー幅となってアウタレ
ンズ２の表面側から観察することができ、ひいては外観
上の品質の低下を招く、という課題を有している。However, as shown in FIG. 6, the outer lens 2 is used for vibration welding or ultrasonic welding.
The tip of the annular rib 3 and the flat surface of the housing 4 are welded to each other, and not only the welding burr and the string 5 are exposed in the vicinity of the welded portion, but also this portion T has a wide dummy width and is located on the surface side of the outer lens 2. Therefore, there is a problem that it is possible to observe from the above, and eventually the quality of the appearance is deteriorated.

【０００８】また、インナシート２０やインナレンズ２
１の取付は、工数が掛かり、ひいてはコスト高を招くば
かりでなく、両面テープ１５を用いた工法では、さらに
接着後、熱や振動等で剥がれや白化を生じる虞がある、
という課題を有している。Further, the inner sheet 20 and the inner lens 2
The attachment of No. 1 not only takes a lot of man-hours and eventually leads to high cost, but the construction method using the double-sided tape 15 may cause peeling or whitening due to heat or vibration after the adhesion.
Has the problem.

【０００９】そこで、この発明は、アウタレンズおよび
光透過部材（インナシートまたはインナレンズ）のハウ
ジングへの固定が、溶着バリや糸引き並びに白化に起因
する外観上の品質の低下を伴うことなく比較的簡単な作
業で確実に行うことができ、ひいてはコストの低減化を
も可能とした車両用灯具およびそのレーザ溶着方法を提
供することを目的としている。Therefore, according to the present invention, the fixing of the outer lens and the light transmitting member (inner sheet or inner lens) to the housing is relatively free from deterioration of appearance quality due to welding burrs, stringing and whitening. An object of the present invention is to provide a vehicular lamp and a laser welding method for the same, which can be surely performed by a simple operation and which can reduce the cost.

【００１０】[0010]

【課題を解決するための手段】前記した目的を達成する
ため、請求項１の発明は、アウタレンズが、レーザ光に
対して透明な熱可塑性樹脂材で構成されると共に、レー
ザ光に対して吸収性のある熱可塑性樹脂材で構成された
ハウジングと共働して光源バルブの設けられる灯室を画
成するように前記ハウジングの開口部を覆うようにして
固定されており、かつ光透過部材が、透明な熱可塑性樹
脂材で構成されると共に、前記光源バルブの光を前記ア
ウタレンズ側に透過するように前記灯室内に設けられて
いる車両用灯具であって、前記アウタレンズは、前記ハ
ウジングの開口部との当接部位を前記アウタレンズ側か
ら照射されるレーザ光により全周に亘ってレーザ溶着す
ることにより前記ハウジングに固定されており、かつ前
記光透過部材は、前記アウタレンズと前記ハウジングと
の間に挟持されると共に、該挟持部位を少なくとも部分
的に前記アウタレンズ側から照射されるレーザ光により
レーザ溶着することにより前記ハウジングに固定されて
いることを特徴とする。In order to achieve the above-mentioned object, the invention of claim 1 is such that the outer lens is made of a thermoplastic resin material transparent to laser light and absorbs the laser light. Is fixed so as to cover the opening of the housing so as to define a lamp chamber in which the light source bulb is provided in cooperation with a housing made of a thermoplastic resin having a light-transmitting property, and a light transmitting member is provided. A vehicle lamp which is made of a transparent thermoplastic resin material and is provided in the lamp chamber so as to transmit the light of the light source bulb to the outer lens side, wherein the outer lens is an opening of the housing. Is fixed to the housing by laser welding the contact portion with the portion over the entire circumference by laser light emitted from the outer lens side, and the light transmitting member, While being sandwiched between the serial outer lens and the housing, characterized in that it is fixed to the housing by laser welding by a laser beam irradiated at least in part on the outer lens side 該挟 lifting site.

【００１１】このため請求項１の発明では、アウタレン
ズは、レーザ光に対して透明な熱可塑性樹脂材で構成さ
れているので、アウタレンズ側から照射されるレーザ光
はアウタレンズを透過してハウジングに到達する。ハウ
ジングは、レーザ光に対して吸収性のある熱可塑性樹脂
材で構成されているので、ハウジングに到達したレーザ
光はハウジングに吸収されて熱に変換され、この熱でハ
ウジングの照射部位を溶解させる。この溶解熱はアウタ
レンズ側にも伝播され、アウタレンズを同様に溶解させ
る。しかして、アウタレンズとハウジングは、その溶解
部同士が融合するレーザ溶着により接合される。アウタ
レンズは、このようなレーザ溶着をアウタレンズの全周
に亘って施すことによって、ハウジングの開口部を覆う
ようにして固定される。Therefore, in the invention of claim 1, since the outer lens is made of a thermoplastic resin material transparent to the laser light, the laser light emitted from the outer lens side passes through the outer lens and reaches the housing. To do. Since the housing is made of a thermoplastic resin material that absorbs laser light, the laser light that reaches the housing is absorbed by the housing and converted into heat, and this heat melts the irradiation site of the housing. . This heat of melting is also propagated to the outer lens side, and similarly melts the outer lens. Then, the outer lens and the housing are joined by laser welding in which the melting portions are fused. The outer lens is fixed so as to cover the opening of the housing by performing such laser welding over the entire circumference of the outer lens.

【００１２】また、光透過部材は、レーザ光に対して透
明な熱可塑性樹脂材で構成されているので、アウタレン
ズ側から照射されるレーザ光は、アウタレンズおよび光
透過部材を透過してハウジングに到達する。ハウジング
に到達したレーザ光は、前述したようにハウジングに吸
収されて熱に変換され、この熱でハウジングの照射部位
を溶解させる。この溶解熱は光透過部材側にも伝播さ
れ、光透過部材を同様に溶解させる。しかして、光透過
部材とハウジングは、その溶解部同士が融合するレーザ
溶着により接合される。光透過部材は、その溶着面にシ
ール性が要求されないので、このようなレーザ溶着は部
分的に施されていれば足りる。Further, since the light transmitting member is made of a thermoplastic resin material which is transparent to the laser light, the laser light emitted from the outer lens side passes through the outer lens and the light transmitting member and reaches the housing. To do. The laser light that has reached the housing is absorbed by the housing and converted into heat as described above, and this heat melts the irradiated portion of the housing. This heat of melting is also propagated to the light transmitting member side, and also melts the light transmitting member. Then, the light transmitting member and the housing are joined by laser welding in which the melting portions are fused. Since the welded surface of the light transmitting member is not required to have a sealing property, it is sufficient if such laser welding is performed partially.

【００１３】また、溶着面は、溶解部同士の融合により
形成されるので、溶着バリや糸引きを生じさせることな
く形成することができる。Further, since the welding surface is formed by fusing the melting portions, the welding surface can be formed without causing welding burrs and stringing.

【００１４】また、請求項２の発明は、請求項１に記載
の車両用灯具であって、前記アウタレンズおよびハウジ
ングのいずれか一方の部材は、他方の部材へ突出する環
状リブを一体に形成して構成されており、かつ前記環状
リブは、その幅方向の外側に位置する前記他方の部材へ
当接する第１当接面と、その幅方向の内側に位置する前
記光透過部材へ当接する第２当接面とからなる段部を先
端面に形成して構成されており、前記アウタレンズおよ
び光透過部材は、前記第１当接面を前記他方の部材へ当
接させると共に、前記第２当接面と他方の部材との間に
前記光透過部材を挟持させた状態で、前記アウタレンズ
側から照射されるレーザ光によるレーザ溶着により前記
ハウジングに固定されていることを特徴とする。The invention according to claim 2 is the vehicular lamp according to claim 1, wherein one member of the outer lens and the housing is integrally formed with an annular rib protruding to the other member. The annular rib has a first contact surface that contacts the other member located outside in the width direction and a first contact surface that contacts the light transmission member located inside the width direction. The outer lens and the light transmissive member contact the first contact surface with the other member, and the second contact surface is formed. It is characterized in that the light transmitting member is sandwiched between the contact surface and the other member, and is fixed to the housing by laser welding with laser light emitted from the outer lens side.

【００１５】このため請求項２の発明では、環状リブ
は、アウタレンズに形成される場合はレーザ光に対して
透明な熱可塑性樹脂材で構成され、ハウジングに形成さ
れる場合はレーザ光に対して吸収性のある熱可塑性樹脂
材で構成される。このためアウタレンズ側から照射され
るレーザ光は、前者の場合、環状リブ、または環状リブ
および光透過部材を介してハウジングに達するのに対し
て、後者の場合、直接または光透過部材を介して環状リ
ブの段部に達する。Therefore, according to the second aspect of the invention, the annular rib is made of a thermoplastic resin material transparent to the laser light when formed on the outer lens, and is made to the laser light when formed on the housing. It is composed of an absorbent thermoplastic resin material. Therefore, the laser light emitted from the outer lens side reaches the housing through the annular rib or the annular rib and the light transmitting member in the former case, while the laser beam is emitted directly or through the light transmitting member in the latter case. Reach the rib step.

【００１６】そして、溶着面は、前者の場合、段部の第
１当接面とハウジングとの間および光透過部材とハウジ
ングとの間にそれぞれ形成されるのに対して、後者の場
合、アウタレンズと段部の第１当接面との間および光透
過部材と段部の第２当接面との間にそれぞれ形成され
る。In the former case, the welding surface is formed between the first contact surface of the step portion and the housing and between the light transmitting member and the housing, whereas in the latter case, the outer lens is formed. And the first contact surface of the step portion and between the light transmitting member and the second contact surface of the step portion.

【００１７】また、レーザ溶着は、前者の場合、ハウジ
ングの溶着面が平坦面であるときは、レーザ光の第１お
よび第２当接面に跨る同一集光径内でのアウタレンズお
よび光透過部材の同時溶着が可能であるのに対して、後
者の場合、光透過部材が厚いとその分第２当接面の深さ
が深くなり前記同時溶着が不能となるが、その場合で
も、光透過部材の厚さ（第２当接面の深さ）に見合った
レーザ光の少しの移動でアウタレンズおよび光透過部材
のレーザ溶着が可能となるので、制御が簡単である。In the former case of laser welding, when the welding surface of the housing is a flat surface, the outer lens and the light transmitting member within the same converging diameter across the first and second contact surfaces of the laser beam. On the other hand, in the latter case, if the light transmitting member is thick, the depth of the second contact surface becomes deeper accordingly and the simultaneous welding becomes impossible. Since the outer lens and the light transmitting member can be laser-welded by a slight movement of the laser beam corresponding to the thickness of the member (the depth of the second contact surface), the control is easy.

【００１８】また、請求項３の発明は、請求項２に記載
の車両用灯具であって、前記環状リブは、前記ハウジン
グに一体に形成されており、前記光透過部材は、一般部
よりも肉薄に形成される被挟持部を周縁部に有して構成
されており、かつ前記アウタレンズは、アウタレンズを
透して照射されるレーザ光による第１当接面へのレーザ
溶着により固定されると共に、前記光透過部材は、アウ
タレンズおよび前記被挟持部を透して照射されるレーザ
光による前記被挟持部の第２当接面へのレーザ溶着によ
り固定されていることを特徴とする。The invention according to claim 3 is the vehicular lamp according to claim 2, wherein the annular rib is formed integrally with the housing, and the light transmitting member is more than the general part. The outer lens is fixed by laser welding to the first contact surface by the laser light emitted through the outer lens. The light transmitting member is fixed by laser welding to the second contact surface of the sandwiched portion by laser light emitted through the outer lens and the sandwiched portion.

【００１９】このため請求項３の発明では、被挟持部を
薄く形成した分第２当接面の深さも浅くなり、これによ
りレーザ溶着は、レーザ光の第１および第２当接面に跨
る同一集光径内でのアウタレンズおよび光透過部材の同
時溶着が可能となる。Therefore, in the third aspect of the invention, since the sandwiched portion is formed thin, the depth of the second abutting surface is also reduced, whereby the laser welding extends over the first and second abutting surfaces of the laser beam. It is possible to simultaneously weld the outer lens and the light transmitting member within the same condensing diameter.

【００２０】また、請求項４の発明は、請求項２または
３に記載の車両用灯具のレーザ溶着方法であって、前記
レーザ光を前記第１当接面と第２当接面に跨る集光径を
有して照射することにより、前記アウタレンズおよび光
透過部材を、前記レーザ光の同一集光径内で同時に溶着
することを特徴とする。A fourth aspect of the present invention is the laser welding method for a vehicular lamp according to the second or third aspect, wherein the laser light is collected over the first contact surface and the second contact surface. The outer lens and the light transmitting member are simultaneously welded within the same converging diameter of the laser light by irradiating with a light diameter.

【００２１】このため請求項４の発明では、溶着工程の
簡略化を図ることができる。Therefore, in the invention of claim 4, the welding process can be simplified.

【００２２】[0022]

【発明の実施の形態】以下、本発明を、実施の形態に基
づいて具体的に説明する。なお、図６〜図８に示す部材
と同一機能を有する部材は、同一符号を付して説明す
る。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below based on the embodiments. It should be noted that members having the same functions as those shown in FIGS. 6 to 8 will be described with the same reference numerals.

【００２３】図１は、本発明の第１実施形態としての車
両用灯具１を示す。この車両用灯具１は、アウタレンズ
２が、レーザ光１３に対して透明な熱可塑性樹脂材で構
成されると共に、レーザ光１３に対して吸収性のある熱
可塑性樹脂材で構成されたハウジング４と共働して光源
バルブ１２の設けられる灯室１１を画成するようにハウ
ジング４の開口部を覆うようにして固定されており、か
つ光透過部材としてのインナシート２０が、レーザ光１
３に対して透明な熱可塑性樹脂材で構成されると共に、
光源バルブ１２の光をアウタレンズ２側に透過するよう
に灯室１１内に設けられている。FIG. 1 shows a vehicular lamp 1 as a first embodiment of the present invention. In this vehicle lamp 1, an outer lens 2 is made of a thermoplastic resin material that is transparent to the laser light 13, and a housing 4 that is made of a thermoplastic resin material that absorbs the laser light 13. The inner sheet 20 as a light transmitting member is fixed so as to cover the opening of the housing 4 so as to define the lamp chamber 11 in which the light source bulb 12 is provided in cooperation with each other.
In addition to being composed of a thermoplastic resin material that is transparent to 3,
It is provided in the lamp chamber 11 so that the light of the light source bulb 12 is transmitted to the outer lens 2 side.

【００２４】そして、アウタレンズ２は、ハウジング４
の開口部との当接部位をアウタレンズ２側から照射され
るレーザ光１３により全周に亘ってレーザ溶着すること
によりハウジング４に固定されており、かつインナシー
ト２０は、アウタレンズ２とハウジング４との間に挟持
されると共に、該挟持部位をアウタレンズ２側から照射
されるレーザ光１３により少なくとも部分的にレーザ溶
着することによりハウジング４に固定されている。図１
中、符号６は、反射面であり、符号８は、レーザ射出部
である。The outer lens 2 has a housing 4
Is affixed to the housing 4 by laser welding the contact portion with the opening of the outer lens 2 with the laser light 13 emitted from the outer lens 2 side, and the inner sheet 20 is fixed to the outer lens 2 and the housing 4. It is fixed to the housing 4 by being laser-welded at least partially with the laser light 13 emitted from the outer lens 2 side. Figure 1
Among them, reference numeral 6 is a reflecting surface, and reference numeral 8 is a laser emitting portion.

【００２５】本実施形態では、アウタレンズ２は、その
外周縁部のやや内側に沿って一体的に形成される透明環
状リブ３を有して構成されており、ハウジング４は、環
状リブ３の内側に対応する部位に一体的に形成される立
壁７を有して構成されている。このとき透明環状リブ３
は、アウタレンズ２の全周に亘って形成されており、立
壁７は、インナシート２０の外周縁部の全周に対応して
設ける必然性はなく、インナシート２０の安定した張設
状態が維持できる場合は、インナシート２０の外周縁部
に沿って部分的に設けてもよい。In the present embodiment, the outer lens 2 has a transparent annular rib 3 formed integrally along the inner periphery of the outer peripheral edge thereof, and the housing 4 has an inner side of the annular rib 3. The vertical wall 7 is integrally formed at a portion corresponding to the. At this time, the transparent annular rib 3
Is formed over the entire circumference of the outer lens 2, and the standing wall 7 does not necessarily have to be provided in correspondence with the entire circumference of the outer peripheral edge portion of the inner seat 20, and the stable stretched state of the inner seat 20 can be maintained. In this case, it may be partially provided along the outer peripheral edge of the inner sheet 20.

【００２６】具体的には、アウタレンズ２は、素通しレ
ンズであり、アクリル樹脂（ＰＭＭＡ）やポリカーボネ
ート樹脂（ＰＣ）等の透明な熱可塑性樹脂材で形成され
ている。Specifically, the outer lens 2 is a transparent lens, and is made of a transparent thermoplastic resin material such as acrylic resin (PMMA) or polycarbonate resin (PC).

【００２７】また、ハウジング４は、レーザ光１３に対
して吸収性のある熱可塑性樹脂材で構成される。このよ
うな熱可塑性樹脂材としては、レーザ光１３に対して吸
収性を有する着色料で着色された熱可塑性樹脂材があ
る。このときの着色料は、例えばカーボンブラックであ
り、樹脂材は、アウタレンズ２の樹脂材（ＰＭＭＡ、Ｐ
Ｃ等）との相溶性のある樹脂材が選択される。このよう
な樹脂材としては、例えばＡＢＳ樹脂、アクリロニトリ
ル・エチレンプロピレン・スチレン樹脂（ＡＥＳ）、ア
クリル・アクリロニトリル・スチレン樹脂（ＡＡＳ（ま
たはＡＳＡ））、アクリロニトリル・スチレン樹脂（Ａ
Ｓ）、ＰＣ樹脂、およびポリマーアロイがある。ポリマ
ーアロイは、例えばＰＣ／ＡＢＳ樹脂、ＰＣ／ＡＡＳ樹
脂、ＰＣ／ポリブチレンテレフタレート（ＰＢＴ）樹
脂、ＰＣ／ポリエチレンテレフタレート（ＰＥＴ）樹脂
等、あるいはＰＭＭＡ／ＡＢＳ樹脂、ＰＭＭＡ／ＡＡＳ
樹脂、ＰＭＭＡ／ＰＢＴ樹脂、ＰＭＭＡ／ＰＥＴ樹脂等
がある。ハウジング４は、前記以外の成分、例えばガラ
ス、シリカ、タルク、炭酸カルシウム等の無機または有
機物よりなるフィラー、帯電防止剤、耐侯安定剤等の慣
用の添加物の１種以上を樹脂材中に含有させることもで
きる。The housing 4 is made of a thermoplastic resin material that absorbs the laser light 13. As such a thermoplastic resin material, there is a thermoplastic resin material colored with a colorant having an absorption property for the laser beam 13. The colorant at this time is, for example, carbon black, and the resin material is the resin material of the outer lens 2 (PMMA, P
A resin material compatible with C) is selected. Examples of such a resin material include ABS resin, acrylonitrile / ethylene propylene / styrene resin (AES), acrylic / acrylonitrile / styrene resin (AAS (or ASA)), and acrylonitrile / styrene resin (A
S), PC resin, and polymer alloy. Polymer alloys include, for example, PC / ABS resin, PC / AAS resin, PC / polybutylene terephthalate (PBT) resin, PC / polyethylene terephthalate (PET) resin, PMMA / ABS resin, PMMA / AAS, etc.
Resin, PMMA / PBT resin, PMMA / PET resin, etc. are available. The housing 4 contains, in the resin material, one or more components other than the above-mentioned components, for example, fillers made of inorganic or organic substances such as glass, silica, talc, calcium carbonate, antistatic agents, weather stabilizers and the like. You can also let it.

【００２８】また、インナシート２０は、例えば厚さ
０．３〜０．５ｍｍのＰＣ樹脂フィルムで構成される。The inner sheet 20 is composed of, for example, a PC resin film having a thickness of 0.3 to 0.5 mm.

【００２９】また、レーザ光１３は、アウタレンズ２
（環状リブ３を含む）内の透過率が充分高くなるような
波長を有するものが適宜選択される。このようなレーザ
光１３として、半導体レーザ（波長８０８ｎｍ、または
９４０ｎｍ）がある。The laser light 13 is emitted from the outer lens 2
A material having a wavelength such that the transmittance inside (including the annular rib 3) is sufficiently high is appropriately selected. As such laser light 13, there is a semiconductor laser (wavelength 808 nm or 940 nm).

【００３０】そして、レーザ溶着は、図１に示すよう
に、透明環状リブ３の先端面を立壁７の外側のハウジン
グ４の平坦面に当接させてアウタレンズ２をセットし、
かつアウタレンズ２の裏面と立壁７の先端面との間で挟
持するようにしてインナシート２０をセットし、その後
前記当接部位を加圧しながら該当個所にアウタレンズ２
側からレーザ光１３を照射することにより行う。すなわ
ち、アウタレンズ２のレーザ溶着は、透明環状リブ３の
真上にレーザ射出部８を位置させて行われ、インナシー
ト２０のレーザ溶着は、立壁７の真上にレーザ射出部８
を移動させて行われる。Then, in laser welding, as shown in FIG. 1, the outer lens 2 is set by bringing the front end surface of the transparent annular rib 3 into contact with the flat surface of the housing 4 outside the standing wall 7.
In addition, the inner sheet 20 is set so as to be sandwiched between the back surface of the outer lens 2 and the tip surface of the standing wall 7, and then the outer lens 2 is placed on the corresponding portion while pressing the contact portion.
It is performed by irradiating the laser beam 13 from the side. That is, the laser welding of the outer lens 2 is performed by positioning the laser emitting portion 8 directly above the transparent annular rib 3, and the laser welding of the inner sheet 20 is performed directly above the standing wall 7 by the laser emitting portion 8.
Is done by moving.

【００３１】アウタレンズ２は、レーザ光１３に対して
透明な熱可塑性樹脂材で構成されているので、アウタレ
ンズ２側から照射されるレーザ光１３はアウタレンズ２
（透明環状リブ３を含む）を透過してハウジング４に到
達する。ハウジング４は、レーザ光１３に対して吸収性
のある熱可塑性樹脂材で構成されているので、ハウジン
グ４に到達したレーザ光１３はハウジング４に吸収され
て熱に変換され、この熱でハウジング４の照射部位を溶
解させる。この溶解熱は透明環状リブ３側にも伝播さ
れ、透明環状リブ３を同様に溶解させる。しかして、透
明環状リブ３とハウジング４は、その溶解部同士が融合
するレーザ溶着により接合される。アウタレンズ２は、
このようなレーザ溶着を透明環状リブ３の全周に亘って
施すことによって、ハウジング４の開口部を覆うように
して固定される。Since the outer lens 2 is made of a thermoplastic resin material transparent to the laser light 13, the laser light 13 emitted from the outer lens 2 side is the outer lens 2.
The light passes through (including the transparent annular rib 3) and reaches the housing 4. Since the housing 4 is made of a thermoplastic resin material that absorbs the laser light 13, the laser light 13 that reaches the housing 4 is absorbed by the housing 4 and converted into heat. Dissolve the irradiated area of. This heat of melting is also propagated to the transparent annular rib 3 side, and melts the transparent annular rib 3 similarly. Then, the transparent annular rib 3 and the housing 4 are joined by laser welding in which the melting portions are fused. The outer lens 2 is
By applying such laser welding over the entire circumference of the transparent annular rib 3, the transparent annular rib 3 is fixed so as to cover the opening of the housing 4.

【００３２】また、インナシート２０は、レーザ光１３
に対して透明な熱可塑性樹脂材で構成されているので、
アウタレンズ２側から照射されるレーザ光１３は、アウ
タレンズ２およびインナシート２０を透過して立壁７に
到達する。立壁７に到達したレーザ光１３は、前述した
ように立壁７に吸収されて熱に変換され、この熱で立壁
７の照射部位を溶解させる。この溶解熱はインナシート
２０側にも伝播され、インナシート２０を同様に溶解さ
せる。しかして、インナシート２０と立壁７は、その溶
解部同士が融合するレーザ溶着により接合される。Further, the inner sheet 20 has a laser beam 13
Since it is composed of a transparent thermoplastic resin material,
The laser light 13 emitted from the outer lens 2 side passes through the outer lens 2 and the inner sheet 20 and reaches the standing wall 7. The laser light 13 that has reached the standing wall 7 is absorbed by the standing wall 7 and converted into heat as described above, and this heat melts the irradiated portion of the standing wall 7. This heat of melting is also propagated to the inner sheet 20 side, and melts the inner sheet 20 as well. Then, the inner sheet 20 and the standing wall 7 are joined by laser welding in which the melted portions are fused.

【００３３】しかして、アウタレンズ２は、アウタレン
ズ２側から照射されるレーザ光１３による透明環状リブ
３とハウジング４との間のレーザ溶着（溶着面９ａ）に
より固定されている。インナシート２０は、アウタレン
ズ２の裏面と立壁７の先端面との間に挟持された状態
で、アウタレンズ２側から照射されるレーザ光１３によ
るインナシート２０と立壁７との間のレーザ溶着（溶着
面９ｂ）により固定されている。The outer lens 2 is fixed by laser welding (welding surface 9a) between the transparent annular rib 3 and the housing 4 by the laser light 13 emitted from the outer lens 2 side. The inner sheet 20 is sandwiched between the back surface of the outer lens 2 and the tip surface of the standing wall 7, and laser welding (welding) between the inner sheet 20 and the standing wall 7 by the laser light 13 emitted from the outer lens 2 side is performed. It is fixed by the surface 9b).

【００３４】このように車両用灯具１においては、その
溶着面９ａ、９ｂは、振動溶着や接着剤を用いることな
く溶解部同士の融合により形成されるので、溶着バリや
糸引きや白化を生じさせることなく形成することができ
る。As described above, in the vehicular lamp 1, since the welding surfaces 9a and 9b are formed by fusion of the melted portions without using vibration welding or an adhesive, welding burrs, stringing and whitening occur. It can be formed without performing.

【００３５】このため車両用灯具１は、アウタレンズ２
およびインナシート２０のハウジング４への固定が、溶
着バリや糸引き並びに白化に起因する外観上の品質の低
下を伴うことなく比較的簡単なレーザ溶着作業で確実に
行うことができ、ひいてはコストの低減化をも可能とし
ている。Therefore, the vehicular lamp 1 includes the outer lens 2
The inner sheet 20 and the inner sheet 20 can be fixed to the housing 4 by a relatively simple laser welding operation without deterioration in appearance quality due to welding burrs, stringing, and whitening, which results in cost reduction. It can also be reduced.

【００３６】図２は、本発明の第２実施形態としての車
両用灯具１０を示す。この車両用灯具１０は、インナシ
ート２０の挟持と、アウタレンズ２とハウジング４の固
定とを１個の環状リブを介して行っている点が相違する
だけで、他の構成は車両用灯具１と同様に構成されてい
る。FIG. 2 shows a vehicular lamp 10 as a second embodiment of the present invention. The vehicular lamp 10 is different from the vehicular lamp 1 only in that the inner sheet 20 is sandwiched and the outer lens 2 and the housing 4 are fixed via one annular rib. It is similarly configured.

【００３７】すなわち本実施形態では、ハウジング４
は、アウタレンズ２へ突出する不透明環状リブ１４を一
体に形成して構成されており、かつ不透明環状リブ１４
は、その幅方向の外側に位置するアウタレンズ２へ当接
する第１当接面１７ａと、その幅方向の内側に位置する
インナシート２０へ当接する第２当接面１７ｂとからな
る段部１７を先端面に形成して構成されている。不透明
環状リブ１４は、ハウジング４の外周縁部のやや内側の
全周に亘って形成されており、かつ第１当接面１７ａ
は、不透明環状リブ１４の全長に亘って形成される。第
２当接面１７ｂは、不透明環状リブ１４の全長に亘って
形成しても良いが、インナシート２０の安定した張設状
態が維持できる場合は、不透明環状リブ１４に沿って部
分的に設けることもできる。アウタレンズ２は、リブを
備えない板状体として構成される。That is, in this embodiment, the housing 4
Is formed by integrally forming an opaque annular rib 14 protruding to the outer lens 2 and
Is a step portion 17 that includes a first contact surface 17a that contacts the outer lens 2 that is positioned outside in the width direction and a second contact surface 17b that contacts the inner sheet 20 positioned inside in the width direction. It is formed on the tip surface. The opaque annular rib 14 is formed over the entire circumference slightly inside the outer peripheral edge portion of the housing 4 and has the first contact surface 17a.
Are formed over the entire length of the opaque annular rib 14. The second contact surface 17b may be formed over the entire length of the opaque annular rib 14, but if the inner sheet 20 can be maintained in a stable stretched state, the second contact surface 17b is partially provided along the opaque annular rib 14. You can also The outer lens 2 is configured as a plate-shaped body having no rib.

【００３８】そして、アウタレンズ２およびインナシー
ト２０は、図２に示すように、第１当接面１７ａをアウ
タレンズ２の裏面に当接させると共に、第２当接面１７
ｂとアウタレンズ２との間にインナシート２０を挟持さ
せた状態で、アウタレンズ２側から照射されるレーザ光
１３によるレーザ溶着によりハウジング４に固定されて
いる。このときのレーザ溶着もまた、前述したと同様の
原理に基づいて行われる。As shown in FIG. 2, the outer lens 2 and the inner sheet 20 have the first contact surface 17a contact the rear surface of the outer lens 2 and the second contact surface 17a.
The inner sheet 20 is sandwiched between the outer lens b and the outer lens 2, and is fixed to the housing 4 by laser welding with the laser light 13 emitted from the outer lens 2 side. The laser welding at this time is also performed based on the same principle as described above.

【００３９】しかして、アウタレンズ２は、アウタレン
ズ２を透して照射されるレーザ光１３による第１当接面
１７ａへのレーザ溶着（溶着面９ｃ）により固定されて
おり、インナシート２０は、アウタレンズ２およびイン
ナシート２０を透して照射されるレーザ光１３による第
２当接面１７ｂへのレーザ溶着（溶着面９ｄ）により固
定されている。Thus, the outer lens 2 is fixed by laser welding (welding surface 9c) to the first contact surface 17a by the laser light 13 radiated through the outer lens 2, and the inner sheet 20 is fixed to the outer lens. It is fixed by laser welding (welding surface 9d) to the second contact surface 17b by the laser light 13 radiated through the inner sheet 20 and the inner sheet 20.

【００４０】このときのレーザ溶着は、第１および第２
当接面１７ａおよび１７ｂにそれぞれ照射される各レー
ザ光１３による個別溶着方法により行うこともできる
が、インナシート２０の厚みが薄い（第２当接面１７ｂ
の深さが浅い）ので、図２に示すように、レーザ光１３
を第１当接面１７ａと第２当接面１７ｂに跨る集光径を
有して照射することにより、アウタレンズ２およびイン
ナシート２０を、レーザ光１３の同一集光径内で同時に
溶着する同時溶着方法を採用することができる。この同
時溶着方法は、個別溶着方法と相違して第１当接面１７
ａと第２当接面１７ｂとの間でレーザ射出部８が移動す
ることがないので、制御が簡単で良好な溶着操作性を有
すると共に、１回の溶着で２箇所を同時に溶着すること
ができるので、溶着工程の簡略化を図ることができる。Laser welding at this time is performed by the first and second laser welding.
The welding can be performed by an individual welding method using each laser beam 13 irradiated on each of the contact surfaces 17a and 17b, but the inner sheet 20 has a small thickness (the second contact surface 17b).
The depth of the laser beam 13 is small, as shown in FIG.
The outer lens 2 and the inner sheet 20 are simultaneously welded within the same converging diameter of the laser light 13 by irradiating the outer lens 2 and the inner sheet 20 with the converging diameter across the first contact surface 17a and the second contact surface 17b. A welding method can be adopted. This simultaneous welding method differs from the individual welding method in that the first contact surface 17
Since the laser emitting portion 8 does not move between the a and the second contact surface 17b, the control is easy and the welding operability is excellent, and two welding points can be simultaneously welded by one welding. Therefore, the welding process can be simplified.

【００４１】このようにして構成される車両用灯具１０
は、前述した車両用灯具１と同様な作用効果を奏するこ
とができることは勿論のこと、加えて同時溶着方法の採
用により製造の容易化とコストの一層の低減化を図るこ
とができる。The vehicle lamp 10 thus configured
Of course, the same operational effects as those of the vehicle lamp 1 described above can be obtained, and in addition, by adopting the simultaneous welding method, the manufacturing can be facilitated and the cost can be further reduced.

【００４２】図３〜図５は、光透過部材としてインナレ
ンズ２１を採用した車両用灯具２２、２３、２４、２５
を示す。これらの車両用灯具２２、２３、２４、２５に
おいて、インナレンズ２１は、アウタレンズ２とハウジ
ング４とで区画形成される灯室１１内に設けられてい
る。インナレンズ２１は、例えば、厚さ１．０〜２．０
ｍｍのＰＣ樹脂板材、あるいは厚さ１．５〜２．５ｍｍ
のＰＭＭＡ樹脂板材で構成される。アウタレンズ２とハ
ウジング４は、第１実施形態と同様の樹脂材を用いて構
成されている。FIGS. 3 to 5 show vehicle lamps 22, 23, 24, 25 which employ an inner lens 21 as a light transmitting member.
Indicates. In these vehicular lamps 22, 23, 24, 25, the inner lens 21 is provided in the lamp chamber 11 defined by the outer lens 2 and the housing 4. The inner lens 21 has a thickness of 1.0 to 2.0, for example.
mm PC resin plate material or thickness 1.5 to 2.5 mm
PMMA resin plate material. The outer lens 2 and the housing 4 are made of the same resin material as in the first embodiment.

【００４３】車両用灯具２２は、前述した第１実施形態
に属するもので、図３に示すように、インナレンズ２１
を採用している点が相違するのみで、他の構成およびレ
ーザ溶着の方法は車両用灯具１と同様である。The vehicle lamp 22 belongs to the first embodiment described above, and as shown in FIG.
The other configuration and the laser welding method are the same as those of the vehicular lamp 1.

【００４４】すなわち、車両用灯具２２は、アウタレン
ズ２が、アウタレンズ２側から照射されるレーザ光１３
による透明環状リブ３とハウジング４との間のレーザ溶
着（溶着面９ａ）により固定されており、インナレンズ
２１が、アウタレンズ２の裏面と立壁７の先端面との間
に挟持された状態で、アウタレンズ２側から照射される
レーザ光１３によるインナレンズ２１と立壁７との間の
レーザ溶着（溶着面９ｅ）により固定されており、車両
用灯具１と同様の作用効果を奏することができる。That is, in the vehicular lamp 22, the outer lens 2 is irradiated with the laser light 13 emitted from the outer lens 2 side.
Are fixed by laser welding (welding surface 9a) between the transparent annular rib 3 and the housing 4 by the inner lens 21 sandwiched between the back surface of the outer lens 2 and the tip surface of the standing wall 7, It is fixed by laser welding (welding surface 9e) between the inner lens 21 and the upright wall 7 by the laser light 13 emitted from the outer lens 2 side, and the same effect as the vehicle lamp 1 can be obtained.

【００４５】また、車両用灯具２３、２４は、前述した
第２実施形態に属するものである。The vehicle lamps 23 and 24 belong to the above-mentioned second embodiment.

【００４６】車両用灯具２３は、図４（ａ）に示すよう
に、不透明環状リブ１４の先端面に厚いインナレンズ２
１を受け入れ可能な深い段部１８を形成した点および段
部１８の各当接面１８ａ、１８ｂ毎にレーザ溶着する点
が相違するだけで、他の構成は車両用灯具１０と同様に
構成されている。段部１８は、アウタレンズ２の裏面に
当接する第１当接面１８ａと、インナレンズ２１をアウ
タレンズ２との間で挟持できるようにインナレンズ２１
の厚さに相当する深さ（第１当接面１８ａからの段差）
に形成される第２当接面１８ｂとから構成されている。As shown in FIG. 4A, the vehicular lamp 23 has a thick inner lens 2 on the tip surface of the opaque annular rib 14.
1 is formed, and a laser welding is performed on each of the contact surfaces 18a and 18b of the step 18, and the other configurations are the same as those of the vehicle lamp 10. ing. The step portion 18 includes an inner lens 21 so that the inner lens 21 can be sandwiched between the first contact surface 18 a that contacts the back surface of the outer lens 2 and the outer lens 2.
Depth corresponding to the thickness of the (step difference from the first contact surface 18a)
And a second contact surface 18b formed on.

【００４７】そして、車両用灯具２３は、アウタレンズ
２が、アウタレンズ２を透過して照射されるレーザ光１
３による段部１８の第１当接面１８ａへのレーザ溶着
（溶着面９ｃ）により固定されており、インナレンズ２
１が、アウタレンズ２の裏面と段部１８の第２当接面１
８ｂとの間に挟持された状態で、アウタレンズ２および
インナレンズ２１を透過して照射されるレーザ光１３に
よる第２当接面１８ｂへのレーザ溶着（溶着面９ｆ）に
より固定されている。In the vehicular lamp 23, the outer lens 2 transmits the laser light 1 emitted through the outer lens 2.
The inner lens 2 is fixed by laser welding (welding surface 9c) to the first contact surface 18a of the step portion 18 by means of 3.
Reference numeral 1 denotes the back surface of the outer lens 2 and the second contact surface 1 of the step portion 18.
It is fixed by laser welding (welding surface 9f) to the second contact surface 18b by the laser light 13 transmitted through the outer lens 2 and the inner lens 21 while being sandwiched between the second contact surface 18b and the second contact surface 18b.

【００４８】この車両用灯具２３の場合、第１当接面１
８ａと第２当接面１８ｂとの段差が大きいので、レーザ
光１３の同一集光径内でのアウタレンズ２およびインナ
レンズ２１の同時溶着が不能であるが、第１および第２
当接面１８ａおよび１８ｂが不透明環状リブ１４の同じ
先端面に形成されるものであるから両者の物理的距離は
必然的に近くなり、その分レーザ溶着時の各当接面１８
ａ、１８ｂ間のレーザ射出部８の移動量が、例えば車両
用灯具２２と比較して小さくなり、ひいてはレーザ溶着
時の制御が簡単になる。In the case of this vehicular lamp 23, the first contact surface 1
Since the step difference between 8a and the second contact surface 18b is large, simultaneous welding of the outer lens 2 and the inner lens 21 within the same converging diameter of the laser light 13 is impossible, but the first and second
Since the contact surfaces 18a and 18b are formed on the same tip surface of the opaque annular rib 14, the physical distance between the contact surfaces 18a and 18b is inevitably short, and the contact surfaces 18 at the time of laser welding are accordingly reduced.
The amount of movement of the laser emitting portion 8 between a and 18b is smaller than that of the vehicle lamp 22, for example, and control at the time of laser welding is simplified.

【００４９】このため車両用灯具２３は、車両用灯具１
０と略同様の作用効果を奏することができる。Therefore, the vehicular lamp 23 is the same as the vehicular lamp 1.
It is possible to obtain substantially the same effect as 0.

【００５０】車両用灯具２４は、図４（ｂ）に示すよう
に、インナレンズ２１の被挟持部２１ａを一般部よりも
肉薄に形成した点およびレーザ光１３の同一集光径内で
アウタレンズ２およびインナレンズ２１を同時溶着した
点が相違するだけで、他の構成は車両用灯具２３と同様
に構成されている。この車両用灯具２４の段部１７は、
車両用灯具１０と同様に、アウタレンズ２へ当接する第
１当接面１７ａと、被挟持部２１ａへ当接する第２当接
面１７ｂとを有して不透明環状リブ１４の先端面に形成
されている。In the vehicle lamp 24, as shown in FIG. 4B, the outer lens 2 is provided at a point where the sandwiched portion 21a of the inner lens 21 is made thinner than the general portion and within the same converging diameter of the laser light 13. The other configuration is the same as that of the vehicular lamp 23, except that the inner lens 21 and the inner lens 21 are simultaneously welded. The step portion 17 of the vehicle lamp 24 is
Like the vehicular lamp 10, it has a first contact surface 17a that contacts the outer lens 2 and a second contact surface 17b that contacts the held portion 21a, and is formed on the tip surface of the opaque annular rib 14. There is.

【００５１】そしてこの車両用灯具２４においては、ア
ウタレンズ２は、アウタレンズ２を透して照射されるレ
ーザ光１３による第１当接面１７ａへのレーザ溶着（溶
着面９ｃ）により固定されており、インナレンズ２１
は、アウタレンズ２および被挟持部２１ａを透して照射
されるレーザ光１３による被挟持部２１ａの第２当接面
１７ｂへのレーザ溶着（溶着面９ｇ）により固定されて
いる。その上、溶着面９ｃおよび９ｇは、同時溶着の採
用により１回のレーザ溶着により同時に形成することが
できる。In this vehicular lamp 24, the outer lens 2 is fixed by laser welding (welding surface 9c) to the first contact surface 17a by the laser light 13 emitted through the outer lens 2. Inner lens 21
Is fixed by laser welding (welding surface 9g) to the second contact surface 17b of the sandwiched portion 21a by the laser light 13 that is emitted through the outer lens 2 and the sandwiched portion 21a. Moreover, the welding surfaces 9c and 9g can be simultaneously formed by one laser welding by adopting the simultaneous welding.

【００５２】このため車両用灯具２４は、車両用灯具１
０と同様の作用効果を奏することができる。Therefore, the vehicle lamp 24 is the same as the vehicle lamp 1
The same effect as 0 can be obtained.

【００５３】図５は、第３実施形態としての車両用灯具
２５を示す。この車両用灯具２５では、アウタレンズ２
は、ハウジング４へ突出する透明環状リブ３を一体に形
成して構成されており、かつ透明環状リブ３は、その幅
方向の外側に位置するハウジング４へ当接する第１当接
面１９ａと、その幅方向の内側に位置するインナレンズ
２１へ当接する第２当接面１９ｂとからなる段部１９を
先端面に形成して構成されている。第２当接面１９ｂ
は、透明環状リブ３の全長に亘って形成しても良いが、
インナレンズ２１の安定した架設状態が維持できる場合
は、透明環状リブ３に沿って部分的に設けることもでき
る。FIG. 5 shows a vehicular lamp 25 as a third embodiment. In this vehicle lamp 25, the outer lens 2
Is formed by integrally forming a transparent annular rib 3 protruding to the housing 4, and the transparent annular rib 3 has a first contact surface 19a that abuts on the housing 4 located on the outer side in the width direction, A step portion 19 including a second contact surface 19b that contacts the inner lens 21 located on the inner side in the width direction is formed on the tip end surface. Second contact surface 19b
May be formed over the entire length of the transparent annular rib 3,
When the stable installation state of the inner lens 21 can be maintained, the inner lens 21 can be partially provided along the transparent annular rib 3.

【００５４】そして、アウタレンズ２およびインナレン
ズ２１は、図５に示すように、第１当接面１９ａをハウ
ジング４の平坦面に当接させると共に、第２当接面１９
ｂとハウジング４の平坦面との間にインナレンズ２１を
挟持させた状態で、アウタレンズ２側から照射されるレ
ーザ光１３によるレーザ溶着によりハウジング４に固定
されている。As shown in FIG. 5, the outer lens 2 and the inner lens 21 make the first contact surface 19a contact the flat surface of the housing 4 and the second contact surface 19a.
The inner lens 21 is sandwiched between b and the flat surface of the housing 4, and is fixed to the housing 4 by laser welding with the laser light 13 emitted from the outer lens 2 side.

【００５５】しかして、アウタレンズ２は、アウタレン
ズ２（透明環状リブ３を含む）を透して照射されるレー
ザ光１３による第１当接面１９ａのハウジング４へのレ
ーザ溶着（溶着面９ｈ）により固定されており、インナ
レンズ２１は、アウタレンズ２（透明環状リブ３を含
む）およびインナレンズ２１を透して照射されるレーザ
光１３によるハウジング４へのレーザ溶着（溶着面９
ｉ）により固定されている。Therefore, the outer lens 2 is laser-welded (welded surface 9h) to the housing 4 on the first contact surface 19a by the laser light 13 which is emitted through the outer lens 2 (including the transparent annular rib 3). The inner lens 21 is fixed, and the inner lens 21 is laser-welded (welded surface 9) to the housing 4 by the laser light 13 radiated through the outer lens 2 (including the transparent annular rib 3) and the inner lens 21.
It is fixed by i).

【００５６】このときのレーザ溶着は、溶着面９ｈ、９
ｉ毎の個別溶着方法により行うこともできるが、溶着面
９ｈ、９ｉがハウジング４の平坦面に形成されるので、
図５に示すように、レーザ光１３を溶着面９ｈと溶着面
９ｉに跨る集光径を有して照射することにより、レーザ
光１３の同一集光径内でアウタレンズ２およびインナレ
ンズ２１を同時に溶着する同時溶着方法を採用すること
ができる。この同時溶着方法は、前述した同時溶着方法
と同様に、個別溶着方法と相違して溶着面９ｈと溶着面
９ｉとの間でレーザ射出部８が移動することがないの
で、制御が簡単で良好な溶着操作性を有すると共に、１
回の溶着で２箇所を同時に溶着することができるので、
溶着工程の簡略化を図ることができる。Laser welding at this time is performed by the welding surfaces 9h and 9h.
Although it can be performed by the individual welding method for each i, since the welding surfaces 9h and 9i are formed on the flat surface of the housing 4,
As shown in FIG. 5, the outer lens 2 and the inner lens 21 are simultaneously irradiated within the same converging diameter of the laser light 13 by irradiating the laser light 13 with a converging diameter across the welding surface 9h and the welding surface 9i. A simultaneous welding method of welding can be adopted. This simultaneous welding method is similar to the above-described simultaneous welding method, unlike the individual welding method, since the laser emitting portion 8 does not move between the welding surface 9h and the welding surface 9i, so that control is simple and satisfactory. With excellent welding operability, 1
Since it is possible to weld two places at the same time by welding once,
It is possible to simplify the welding process.

【００５７】このようにして構成される車両用灯具２５
は、車両用灯具１０と同様な作用効果を奏することがで
きる。The vehicular lamp 25 constructed in this way
Can produce the same effect as the vehicle lamp 10.

【００５８】[0058]

【発明の効果】以上詳細に説明したように本発明によれ
ば次の効果を奏することができる。As described in detail above, according to the present invention, the following effects can be obtained.

【００５９】すなわち、請求項１の発明によれば、アウ
タレンズおよび光透過部材のハウジングへの固定が、溶
着バリや糸引き並びに白化に起因する外観上の品質の低
下を伴うことなく比較的簡単なレーザ溶着作業で確実に
行うことができ、ひいてはコストの低減化をも可能とす
る車両用灯具を提供することができる。That is, according to the invention of claim 1, the fixing of the outer lens and the light transmitting member to the housing is relatively simple without causing deterioration in appearance due to welding burrs, stringing and whitening. It is possible to provide a vehicular lamp that can be surely performed by laser welding work and that can also reduce costs.

【００６０】また、請求項２の発明によれば、アウタレ
ンズおよび光透過部材が当接する第１および第２当接面
を備えた段部を、アウタレンズあるいはハウジングに突
出形成される環状リブの先端面に形成したので、アウタ
レンズおよび光透過部材の各溶着箇所が漸近し、その分
溶着箇所間のレーザ光の移動量が少なくなり、これによ
り請求項１の発明の効果に加えて、溶着作業の制御が簡
単で作業精度の向上を図ることができると共に、コスト
の一層の低減化をも図ることができる。According to the second aspect of the present invention, the stepped portion having the first and second contact surfaces with which the outer lens and the light transmitting member come into contact with each other is provided with the step surface of the annular rib projectingly formed on the outer lens or the housing. Since the welding positions of the outer lens and the light transmitting member are gradually asymptotically reduced, the amount of movement of the laser beam between the welding positions is reduced by that amount, and thus, in addition to the effect of the invention of claim 1, the control of welding work is performed. However, the working accuracy can be improved, and the cost can be further reduced.

【００６１】また、請求項３の発明によれば、レーザ溶
着は、レーザ光の第１および第２当接面に跨る同一集光
径内でのアウタレンズおよび光透過部材の同時溶着が可
能となるので、請求項２の発明の効果に加えて、溶着作
業の制御が一層簡単でコストの一層の低減化を図ること
ができる。According to the third aspect of the invention, the laser welding enables simultaneous welding of the outer lens and the light transmitting member within the same converging diameter across the first and second contact surfaces of the laser light. Therefore, in addition to the effect of the second aspect of the invention, the control of the welding work can be further simplified, and the cost can be further reduced.

【００６２】また、請求項４の発明によれば、レーザ光
の同一集光径内で、アウタレンズおよび光透過部材を同
時に溶着するので、制御が簡単で良好な溶着操作性を有
すると共に、溶着工程の簡略化を図ることができる車両
用灯具のレーザ溶着方法を提供することができる。Further, according to the invention of claim 4, the outer lens and the light transmitting member are simultaneously welded within the same converging diameter of the laser beam, so that the control is easy and the welding operation is good, and the welding step is performed. It is possible to provide a laser welding method for a vehicular lamp that can simplify the above.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１実施形態としての車両用灯具の断
面を示す模式図である。FIG. 1 is a schematic view showing a cross section of a vehicle lamp as a first embodiment of the present invention.

【図２】本発明の第２実施形態としての車両用灯具の一
部断面を示す模式図である。FIG. 2 is a schematic view showing a partial cross section of a vehicular lamp as a second embodiment of the present invention.

【図３】本発明の第１実施形態としての他の車両用灯具
の断面を示す模式図である。FIG. 3 is a schematic view showing a cross section of another vehicular lamp as the first embodiment of the present invention.

【図４】（ａ）は本発明の第２実施形態としての他の車
両用灯具の一部断面を示す模式図、（ｂ）は本発明の第
２実施形態としての更に他の車両用灯具の一部断面を示
す模式図である。FIG. 4A is a schematic view showing a partial cross section of another vehicular lamp according to the second embodiment of the present invention, and FIG. 4B is still another vehicular lamp according to the second embodiment of the present invention. It is a schematic diagram which shows the partial cross section of.

【図５】本発明の第３実施形態としての車両用灯具の断
面を示す模式図である。FIG. 5 is a schematic view showing a cross section of a vehicular lamp as a third embodiment of the present invention.

【図６】従来の車両用灯具の課題を説明するための断面
模式図である。FIG. 6 is a schematic cross-sectional view for explaining a problem of a conventional vehicle lamp.

【図７】（ａ）、（ｂ）は、従来の他の車両用灯具の課
題を説明するための一部断面模式図である。7A and 7B are schematic partial cross-sectional views for explaining the problems of other conventional vehicle lamps.

【図８】従来のさらに他の車両用灯具の課題を説明する
ための一部断面模式図である。FIG. 8 is a schematic partial cross-sectional view for explaining a problem of still another conventional vehicle lighting device.

【符号の説明】[Explanation of symbols]

１，１０，２２，２３，２４，２５ 車両用灯具 ２ アウタレンズ ３ 透明環状リブ（環状リブ） ４ ハウジング ９ａ〜９ｉ 溶着面（レーザ溶着） １１ 灯室 １２ 光源バルブ １３ レーザ光 １４ 不透明環状リブ（環状リブ） ２０ インナシート（光透過部材） ２１ インナレンズ（光透過部材） ２１ａ 被挟持部（インナレンズの） 1,10,22,23,24,25 Vehicle lighting 2 outer lens 3 Transparent annular rib (annular rib) 4 housing 9a-9i Welding surface (laser welding) 11 light room 12 Light source bulb 13 Laser light 14 Opaque annular rib (annular rib) 20 Inner sheet (light transmitting member) 21 Inner lens (light transmitting member) 21a Clamped part (of inner lens)

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】 アウタレンズが、レーザ光に対して透明
な熱可塑性樹脂材で構成されると共に、レーザ光に対し
て吸収性のある熱可塑性樹脂材で構成されたハウジング
と共働して光源バルブの設けられる灯室を画成するよう
に前記ハウジングの開口部を覆うようにして固定されて
おり、かつ光透過部材が、レーザ光に対して透明な熱可
塑性樹脂材で構成されると共に、前記光源バルブの光を
前記アウタレンズ側に透過するように前記灯室内に設け
られている車両用灯具であって、 前記アウタレンズは、前記ハウジングの開口部との当接
部位を前記アウタレンズ側から照射されるレーザ光によ
り全周に亘ってレーザ溶着することにより前記ハウジン
グに固定されており、かつ前記光透過部材は、前記アウ
タレンズと前記ハウジングとの間に挟持されると共に、
該挟持部位を少なくとも部分的に前記アウタレンズ側か
ら照射されるレーザ光によりレーザ溶着することにより
前記ハウジングに固定されていることを特徴とする車両
用灯具。1. A light source bulb in which an outer lens is made of a thermoplastic resin material transparent to laser light, and cooperates with a housing made of a thermoplastic resin material absorbing laser light. Is fixed so as to cover the opening of the housing so as to define a lamp chamber in which the light transmitting member is formed of a thermoplastic resin material transparent to laser light, and A vehicular lamp provided in the lamp chamber so that light of a light source bulb is transmitted to the outer lens side, wherein the outer lens is irradiated from the outer lens side with a contact portion with an opening of the housing. It is fixed to the housing by laser welding over the entire circumference with laser light, and the light transmitting member is sandwiched between the outer lens and the housing. Together with is,
A vehicular lamp which is fixed to the housing by laser-welding the sandwiched portion at least partially with laser light emitted from the outer lens side. 【請求項２】 請求項１に記載の車両用灯具であって、 前記アウタレンズおよびハウジングのいずれか一方の部
材は、他方の部材へ突出する環状リブを一体に形成して
構成されており、かつ前記環状リブは、その幅方向の外
側に位置する前記他方の部材へ当接する第１当接面と、
その幅方向の内側に位置する前記光透過部材へ当接する
第２当接面とからなる段部を先端面に形成して構成され
ており、 前記アウタレンズおよび光透過部材は、前記第１当接面
を前記他方の部材へ当接させると共に、前記第２当接面
と他方の部材との間に前記光透過部材を挟持させた状態
で、前記アウタレンズ側から照射されるレーザ光による
レーザ溶着により前記ハウジングに固定されていること
を特徴とする車両用灯具。2. The vehicular lamp according to claim 1, wherein one member of the outer lens and the housing is integrally formed with an annular rib protruding to the other member, and The annular rib has a first contact surface that comes into contact with the other member located outside in the width direction,
A step portion formed of a second contact surface that abuts on the light transmitting member located inside the width direction is formed on the tip end surface, and the outer lens and the light transmitting member have the first contact. While the surface is brought into contact with the other member and the light transmitting member is sandwiched between the second contact surface and the other member, laser welding is performed by laser light emitted from the outer lens side. A vehicular lamp fixed to the housing. 【請求項３】 請求項２に記載の車両用灯具であって、 前記環状リブは、前記ハウジングに一体に形成されてお
り、 前記光透過部材は、一般部よりも肉薄に形成される被挟
持部を周縁部に有して構成されており、かつ前記アウタ
レンズは、アウタレンズを透して照射されるレーザ光に
よる第１当接面へのレーザ溶着により固定されると共
に、前記光透過部材は、アウタレンズおよび前記被挟持
部を透して照射されるレーザ光による前記被挟持部の第
２当接面へのレーザ溶着により固定されていることを特
徴とする車両用灯具。3. The vehicular lamp according to claim 2, wherein the annular rib is formed integrally with the housing, and the light transmitting member is sandwiched to be thinner than a general portion. The outer lens is fixed by laser welding to the first contact surface by laser light emitted through the outer lens, and the light transmitting member is The vehicular lamp is fixed by laser welding to a second contact surface of the sandwiched portion by laser light emitted through the outer lens and the sandwiched portion. 【請求項４】 請求項２または３に記載の車両用灯具の
レーザ溶着方法であって、 前記レーザ光を前記第１当接面と第２当接面に跨る集光
径を有して照射することにより、前記アウタレンズおよ
び光透過部材を、前記レーザ光の同一集光径内で同時に
溶着することを特徴とする車両用灯具のレーザ溶着方
法。4. The laser welding method for a vehicular lamp according to claim 2, wherein the laser light is emitted with a converging diameter extending over the first contact surface and the second contact surface. By doing so, the outer lens and the light transmitting member are simultaneously welded within the same converging diameter of the laser light, and the laser welding method for a vehicular lamp.
JP2001311304A 2001-10-09 2001-10-09 Vehicle lamp and laser welding method thereof Expired - Fee Related JP3972621B2 (en)

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