JP5611624B2 - Vehicle lighting - Google Patents
Vehicle lighting Download PDFInfo
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- JP5611624B2 JP5611624B2 JP2010055427A JP2010055427A JP5611624B2 JP 5611624 B2 JP5611624 B2 JP 5611624B2 JP 2010055427 A JP2010055427 A JP 2010055427A JP 2010055427 A JP2010055427 A JP 2010055427A JP 5611624 B2 JP5611624 B2 JP 5611624B2
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- housing
- lens
- rib
- contact surface
- peripheral edge
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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
- B29C65/1635—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
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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
- B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
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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
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
- B29C65/782—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined
- B29C65/7823—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined by using distance pieces, i.e. by using spacers positioned between the parts to be joined and forming a part of the joint
- B29C65/7829—Positioning the parts to be joined, e.g. aligning, indexing or centring by setting the gap between the parts to be joined by using distance pieces, i.e. by using spacers positioned between the parts to be joined and forming a part of the joint said distance pieces being integral with at least one of the parts to be joined
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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
- 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
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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
- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
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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
- 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
- B29C66/13—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
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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
- 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
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/322—Providing cavities in the joined article to collect the burr
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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
- 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
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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
- 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
- B29C66/65—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 with a relative motion between the article and the welding tool
- B29C66/652—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 with a relative motion between the article and the welding tool moving the welding tool around the fixed article
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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
- 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
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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
- 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
- B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
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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
- 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
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- 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)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
本発明は、車両用のヘッドランプ、テールランプ等の車両用灯具に関するものであり、詳細には、これら車両用灯具に使用される樹脂製のハウジングに透明樹脂製のレンズが溶着によって固定された車両用灯具に関するものである。 The present invention relates to a vehicular lamp such as a head lamp and a tail lamp for a vehicle, and more specifically, a vehicle in which a transparent resin lens is fixed to a resin housing used for the vehicular lamp by welding. It relates to a lighting fixture.
従来のこの種のレンズとハウジングとが溶着によって固定された車両用灯具は、例えば、特開平10−310676号(以下特許文献1)に示されている。この特許文献1の車両用灯具は、レンズの周縁端部とハウジングの周縁端部との間に温度150度〜350度の熱板を挟み、数秒間加熱、溶融し、熱板を取り去った後、ただちにレンズ周縁端部とハウジング周縁端部とを互いに押圧することによって溶着し、レンズとハウジングとを接合、一体化(熱板溶着)したものである。 A conventional vehicular lamp in which a lens of this type and a housing are fixed by welding is disclosed in, for example, Japanese Patent Laid-Open No. 10-310676 (hereinafter referred to as Patent Document 1). In the vehicular lamp of Patent Document 1, a hot plate having a temperature of 150 to 350 degrees is sandwiched between a peripheral edge of a lens and a peripheral edge of a housing, heated and melted for several seconds, and the hot plate is removed. The lens peripheral edge and the housing peripheral edge are immediately welded to each other, and the lens and the housing are joined and integrated (hot plate welding).
また、特開2003−123512号(以下特許文献2)の車両用灯具では、レンズをレーザ光に対して透明な樹脂材料によって形成すると共に、ハウジングをレーザ光に対して吸収性のある樹脂材料によって形成し、これらレンズの周縁端部とハウジングの周縁端部とを当接させた状態でこの当接面に対しレーザ光を照射することで、ハウジングに到達したレーザ光が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とレンズの当接部が溶融することで、レンズとハウジングとを接合、一体化(レーザ溶着)したものである。 In the vehicular lamp disclosed in Japanese Patent Application Laid-Open No. 2003-123512 (hereinafter referred to as Patent Document 2), the lens is formed of a resin material that is transparent to laser light, and the housing is formed of a resin material that absorbs laser light. By forming and irradiating laser light onto the contact surface in a state where the peripheral edge of the lens and the peripheral edge of the housing are in contact with each other, the laser light reaching the housing is absorbed by the housing and heated. The contact portion between the housing and the lens is melted by this heat, so that the lens and the housing are joined and integrated (laser welding).
しかしながら、前記した従来の車両用灯具のレンズとハウジングの溶着部の構造では、図4に示すように、レンズ92の周縁端部に形成されたシールリブ92a先端とハウジング93の周縁端部93aとが平坦面どおしの溶着となり、当接部(溶着部)付近Aにバリや糸引きが発生し、この部分がレンズ意匠面側から観察され、外観上の見映えが悪く、商品価値の低下を招くといった課題があった。
However, in the structure of the lens and housing welded portion of the conventional vehicle lamp described above, the tip end of the
本発明は前記した課題を解決し、簡単な構成により、レンズとハウジングとの溶着部付近の外観上の見映えの悪化を防ぐ溶着部構造を備えた車両用灯具を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a vehicular lamp provided with a welded portion structure that prevents deterioration in appearance in the vicinity of a welded portion between a lens and a housing with a simple configuration. .
上記課題を解決するために、本発明は、レーザ光に対して吸光性を有する樹脂材料によって形成され、前面に灯室を構成する開口を有するハウジングと、前記レーザ光に対して透光性を有する樹脂材料からなり、周縁端部にシールリブが形成され、前記ハウジングの開口を覆うレンズとを備え、前記レーザ光を用いたレーザ溶着によって前記ハウジングの周縁と前記シールリブとを接合、一体化して前記灯室が形成されている車両用灯具において、前記ハウジングの周縁には、前記レンズのシールリブの先端と当接する当接面と、前記当接面より少なくとも灯室内の側に前記当接面に沿って全周に亘り突設している壁状リブとが、形成された、ハウジング周縁端部を前面側に有しており、前記シールリブの先端と前記ハウジング周縁端部は、前記当接面で当接させた状態で前記レンズを通してレーザ光が前記当接面に照射されて接合、一体化され、前記ハウジング周縁端部の当接面には、凸状の溶着部が全周に亘って形成されており、前記レーザ溶着による接合、一体化を行う前の状態においては、前記シールリブの高さと前記溶着部の高さの和が、前記壁状リブの高さより大きくなるように形成され、前記レーザ溶着による接合、一体化を行った後の状態においては、前記シールリブの先端と前記溶着部の溶着により沈み込んで、前記ハウジングの壁状リブの先端部が前記レンズに当接し、前記ハウジングの壁状リブの先端部が前記レンズに当接した状態で、前記灯室が構成されていることを特徴とする車両用灯具を提供することで課題を解決するものである。
In order to solve the above-described problems, the present invention provides a housing made of a resin material that absorbs laser light and has an opening that forms a lamp chamber on the front surface, and is transparent to the laser light. a resin material having, sealing ribs are formed on the peripheral edge, and a lens covering the opening of the housing, the peripheral edge and bonding the seal ribs of the housing by laser welding using the laser beam, integral with the in the vehicle lamp lighting chamber is formed, the periphery of the housing, a tip abutting contact surface of the seal ribs of the lens, the along the abutment surface on the side of at least the lamp chamber from the abutment surface a wall-like rib which is projected over the whole circumference Te was formed, a housing peripheral edge has on the front side, the tip and the housing perimeter edge of the sealing rib is Serial abutment surface at a junction laser light through the lens in a state of being contact is irradiated on the abutment surface, are integrated, the abutment surface of the housing perimeter edge is convex welded portion is all It is formed over the circumference, and in a state before joining and integration by the laser welding, the sum of the height of the seal rib and the height of the welded portion is larger than the height of the wall-shaped rib. In the state after joining and integration by laser welding, the tip end of the seal rib and the welded portion sink, and the tip of the wall-like rib of the housing touches the lens. contact and, in a state where the top portion of the wall-shaped rib of the housing is in contact with the lens, it is to solve the problem by providing a vehicle lamp, wherein the lamp chamber is formed .
以上のように本発明によれば、車両用灯具のハウジングの周縁端部には、ハウジング周縁端部とレンズのシールリブとの当接面より少なくとも灯室内側にこの当接面に沿ってリブが全周に亘り突設されていることにより、レンズとハウジングとの溶着部付近の外観上の見映えの悪化を防ぐ溶着部構造を備えた車両用灯具が提供される。 As described above, according to the present invention, the peripheral edge of the housing of the vehicular lamp is provided with a rib along the contact surface at least on the lamp chamber side from the contact surface between the peripheral edge of the housing and the seal rib of the lens. Protruding over the entire circumference provides a vehicular lamp that has a welded portion structure that prevents deterioration in appearance in the vicinity of the welded portion between the lens and the housing.
以下、本発明の車両用灯具のレンズとハウジングの溶着部構造について、添付図面を参照して説明する。 Hereinafter, a welded portion structure of a lens and a housing of a vehicle lamp according to the present invention will be described with reference to the accompanying drawings.
図1は本発明の車両用灯具の第一実施形態のレンズとハウジングの溶着部構造を示す説明図であり、従来と同様にレンズ2はレーザ光に対して透光性を有する透明な樹脂材料によって形成され、ハウジング3はレーザ光に対して吸収性のある樹脂材料によって形成されている。また、ハウジング3は前面に開口を有していて、ハウジング3の開口を覆うようにレンズ2が取り付けられて車両用灯具の灯室1が形成される。このとき、レンズ2の周縁端部にはシールリブ2aが設けられていて、このシールリブ2aの先端とハウジング3の周縁端部3aとを当接させた状態で当接面Bに対しレーザ光Lを照射することで、ハウジング3とレンズ2とをレーザ溶着によって接合、一体化することで車両用灯具の灯室1が形成される。
FIG. 1 is an explanatory view showing a welded portion structure of a lens and a housing of a first embodiment of a vehicular lamp according to the present invention, and a
ここで、レンズ2はレーザ光に対して透光性を有する透明な樹脂材料によって形成されているものであり、レーザ光に対して透光性を有する透明な樹脂材料としては、ポリカーボネート(PC)、ポリメチルメタクリレート(PMMA)などがある。また、ハウジング3は、レーザ光に対して吸光性を有する樹脂材料によって形成されているものであり、レーザ光に対して吸光性を有する樹脂材料としては、アクリロニトリロスチレンアクリレート(ASA)などがある。
Here, the
そして、レンズ2周縁端部のシールリブ2aとハウジング3の周縁端部3aとを当接面Bで当接させ、この当接面BにレーザLを照射して溶融し、加圧しながらレーザLをレンズシールリブ2aの外周方向に沿って走査することにより、レンズ2とハウジング3とが溶着され、車両用灯具の灯室1が形成される。
Then, the
さらに、ハウジング3の周縁端部3aには、ハウジング周縁端部3aとレンズ2のシールリブ2aとの当接面Bの灯室内と灯室外の両側に当接面Bに沿って壁状のリブ3bが全周に亘り突設されていて、リブ3bによってレンズ2とハウジング3とのレーザ溶着時の溶着部となる当接面Bをハウジング3の周縁端部3a全周に亘って囲うことで、溶着時に発生するバリの流出を抑えると共に、レンズ意匠面側から観たときにリブ3bで溶着部が遮蔽されて、バリが観察されることはない。
Further, the
図2は本発明の車両用灯具の第二実施形態のレンズとハウジングの溶着部の構造を示す説明図であり、この第二実施形態では、ハウジング周縁端部13aの当接面Bに沿った灯室内の側のみにリブ13bが突設されている。これは、レーザ溶着後にバリの除去ができない灯室内の側のみにリブ13bを形成し、灯室外の側はレーザ溶着後にバリを外側から除去することで、バリによる見栄え悪化を防ぐものである。そのため、リブ13bは少なくともレーザ溶着後にバリの除去ができない灯室内の側のみに形成すれば良い。
FIG. 2 is an explanatory view showing the structure of the welded portion of the lens and housing of the second embodiment of the vehicular lamp according to the present invention. In this second embodiment, it is along the contact surface B of the housing
図3は本発明の車両用灯具の第三実施形態のレンズとハウジングの溶着部の構造を示す説明図であり、ハウジング23の周縁端部23aには、レンズ22のシールリブ22aとの当接面Bに凸状溶着部23cを全周に亘って形成すると共に、シールリブ22aの高さaと凸状溶着部23cの高さbの和(a+b)は、リブ23bの高さhより大きくなるように形成し、シールリブ22aの高さaと凸状溶着部23cの高さbの和(a+b)とリブ23bの高さhとの差(a+b−h)をレーザ溶着時の沈み込み量として、リブ23bの高さhが設定されている。
FIG. 3 is an explanatory view showing the structure of the welded portion of the lens and housing of the third embodiment of the vehicular lamp according to the present invention. The
これにより、リブ23bは溶着部のバリをレンズ意匠面側から観察されないようにすると共に、レーザ溶着時にリブ23bの先端部がレンズ22に当接することで、レーザ溶着時の沈み込み量が制御されるストッパとして機能も果たすものとなっている。通常、レーザ溶着の場合、樹脂の溶かし込み量は0.2mm以下程度で行い、好ましくは0.1mm以下の溶かし込みによって行う。
As a result, the
したがって、レーザ溶着時の沈み込み量として、シールリブ22aの高さaと凸状溶着部23cの高さbの和(a+b)とリブ23bの高さhとの差(a+b−h)からリブ23bの高さhを適宜設定することで、上記所望の沈み込み量となるように調整できる。
Therefore, as a sinking amount at the time of laser welding, the
さらに、凸状溶着部23cの両側にレーザ溶着時のストッパとしての機能を有するリブ23bが、ハウジング23の周縁端部23aの全周に亘って同じ高さで形成されることによって、ハウジング23に対するレンズ22取り付けの平衡度はより向上するものとなる。
Furthermore,
こうした溶着部構造は、従来の熱板溶着では、ハウジング23の凸状溶着部23cに熱板を直接当てられないため溶着が不可能であるが、レーザ溶着によって溶着が可能になる。
Such a welded portion structure cannot be welded by conventional hot plate welding because the hot plate cannot be directly applied to the convex welded
以上実施例に沿って説明したが本発明はこれら限定されるものではなく、レンズはレーザ光に対して透光性を有する樹脂材料であれば良く、また、ハウジングはレーザ光に対して吸光性を有する樹脂材料でれば良く、カーボンブラック等の着色料が添加されたポリカーボネート等の樹脂部材で形成されていても良い。 Although the present invention has been described above with reference to the embodiments, the present invention is not limited to these, and the lens may be a resin material that is transparent to laser light, and the housing is light-absorbing to laser light. The resin material may be formed of a resin member such as polycarbonate to which a colorant such as carbon black is added.
本発明は、車両用のヘッドランプ、テールランプ等の車両用灯具に適用することができ、レンズとハウジングとの溶着部付近の外観上の見映えの悪化を防ぐ溶着部構造を備えた車両用灯具が提供される。 INDUSTRIAL APPLICABILITY The present invention can be applied to a vehicle lamp such as a head lamp and a tail lamp for a vehicle, and has a welded portion structure that prevents deterioration in appearance in the vicinity of the welded portion between the lens and the housing. Is provided.
1 車両用灯具(灯室)
2 レンズ
2a シールリブ
3 ハウジング
3a 周縁端部
3b リブ
11 車両用灯具(灯室)
12 レンズ
12a シールリブ
13 ハウジング
13a 周縁端部
13b リブ
21 車両用灯具(灯室)
22 レンズ
22a シールリブ
23 ハウジング
23a 周縁端部
23b リブ
23c 凸状溶着部
B 当接面(レーザ溶着部)
L レーザ光
1 Vehicle lamps (light room)
2
12
22
L Laser light
Claims (2)
前記レーザ光に対して透光性を有する樹脂材料からなり、周縁端部にシールリブが形成され、前記ハウジングの開口を覆うレンズとを備え、
前記レーザ光を用いたレーザ溶着によって前記ハウジングの周縁と前記シールリブとを接合、一体化して前記灯室が形成されている車両用灯具において、
前記ハウジングの周縁には、前記レンズのシールリブの先端と当接する当接面と、前記当接面より少なくとも灯室内の側に前記当接面に沿って全周に亘り突設している壁状リブとが、形成された、ハウジング周縁端部を前面側に有しており、
前記シールリブの先端と前記ハウジング周縁端部は、前記当接面で当接させた状態で前記レンズを通してレーザ光が前記当接面に照射されて接合、一体化され、
前記ハウジング周縁端部の当接面には、凸状の溶着部が全周に亘って形成されており、
前記レーザ溶着による接合、一体化を行う前の状態においては、前記シールリブの高さと前記溶着部の高さの和が、前記壁状リブの高さより大きくなるように形成され、
前記レーザ溶着による接合、一体化を行った後の状態においては、前記シールリブの先端と前記溶着部の溶着により沈み込んで、前記ハウジングの壁状リブの先端部が前記レンズに当接し、
前記ハウジングの壁状リブの先端部が前記レンズに当接した状態で、前記灯室が構成されていることを特徴とする車両用灯具。 A housing formed of a resin material having absorptivity with respect to the laser light and having an opening constituting a lamp chamber on the front surface ;
A resin material having a light-transmitting property with respect to the laser beam, the sealing ribs are formed on the peripheral edge, and a lens covering the opening of the housing,
In laser welding by bonding the the edge of the housing seal ribs, integral with the vehicle lamp wherein the lamp chamber is formed using the laser beam,
At the periphery of the housing, a contact surface that contacts the tip of the seal rib of the lens, and a wall shape that protrudes over the entire circumference along the contact surface at least on the lamp chamber side from the contact surface. The rib has a housing peripheral edge formed on the front side,
It said housing perimeter edge and the tip of the sealing rib, the abutment surface at the joint is irradiated to the laser beam the contact surface through the lens in a state of being contact are integrated,
On the contact surface of the peripheral edge of the housing , a convex weld is formed over the entire circumference,
In the state before joining and integration by the laser welding, the sum of the height of the seal rib and the height of the welded portion is formed to be larger than the height of the wall-shaped rib,
Joined by the laser welding, in the state after the integrated sinks a tip of the sealing rib by welding of the welded portion, the tip portion of the wall-shaped rib of said housing to abut against the lens,
The vehicular lamp is characterized in that the lamp chamber is configured in a state in which a tip of a wall-shaped rib of the housing is in contact with the lens .
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