JP2004071333A

JP2004071333A - Assembling method of vehicle lighting fixture and lamp body, and front lens

Info

Publication number: JP2004071333A
Application number: JP2002228587A
Authority: JP
Inventors: Hirokazu Yanagihara; 柳原　弘和; Katsuhiko Nakayama; 中山　勝彦; Yusuke Umehara; 梅原　祐介
Original assignee: Koito Manufacturing Co Ltd
Current assignee: Koito Manufacturing Co Ltd
Priority date: 2002-08-06
Filing date: 2002-08-06
Publication date: 2004-03-04

Abstract

<P>PROBLEM TO BE SOLVED: To improve sealing performance at the engaging part between a sticker leg 22 and a seal-groove 14 in a vehicle lighting fixture in which a convex/concave engaging part 30 being a mechanical binding means is installed between the sticker leg 22 of the front lens 20 and the seal-groove 14 of a lamp body 10. <P>SOLUTION: In the vehicle lighting fixture in which a convex part 24 is installed on the outside of the sticker leg 22 of the front lens 20, a recess 18 constituting a convex/concave engaging part 30 in cooperation with the convex part of the seal leg is installed on the exterior wall 16 of the sticker groove 14 of the lamp body with which the sticker leg 22 engages, and at the same time as the seal leg is inserted into the sticker groove 14 mounted with the sealant 13, the convex part of the seal leg is elastically engaged with the recess of the sticker groove so that the lamp body and the front lens are mechanically fastened, a thin wall part 19a extending along the sticker groove over the region corresponding to the convex/concave engaging part on the bottom wall 17 of the sticker groove is installed, and at inserting the sticker leg into the sticker groove, the exterior wall of the sticker groove pushed by the convex part of the sticker leg is bent, thereby, the sticker leg is inserted into the sticker groove without bending. Thereby, inconveniences such as scraping-out of the sealant does not occur. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
本発明は、前面レンズのシール脚の外側には凸部が設けられ、一方、シール脚が係合するランプボディのシール溝の外壁には、シール脚の凸部と協働して凹凸係合部を構成する凹部が設けられ、シール材を装填したシール溝にシール脚を挿入すると同時にシール脚の凸部がシール溝の凹部に係合してランプボディと前面レンズが機械的に締結される車両用灯具、およびランプボディと前面レンズの組み付け方法に関する。
【０００２】
【従来の技術】
この種の灯具としては、図１４に示されるように、前面レンズ１のシール脚２の外側には凸部（突起）３ａが設けられ、一方、シール脚２が係合するランプボディ４のシール溝５の外壁６には、シール脚２の凸部３ａと協働して凹凸係合部３を構成する凹部（係合孔）３ｂが設けられている。そして、図１５（ａ），（ｂ），（ｃ）に示すように、ホットメルト等のシール材８を装填したシール溝５にシール脚２を挿入すると同時に、シール脚２の凸部３ａがシール溝５の凹部３ｂに弾性係合してランプボディ４と前面レンズ１が機械的に締結されて、シール溝５とシール脚２との係合部における防水がシール材８によって確保される構造となっている。
【０００３】
【発明の解決しようとする課題】
しかし前記した従来構造では、シール脚２をシール溝５に挿入する際に、シール溝５の外壁６と干渉するシール脚２（の凸部３ａ）がシール溝５の内側に撓んだ形態でシール溝５に挿入され、シール脚２側の凸部３ａがシール溝５側の凹部３ｂに係合する段階でシール脚２が復元する際に、図１５（ｂ），（ｃ）に示すように、シール脚２がシール溝５内のシール材８を掻き出し、凹部（係合孔）３ｂからシール材８がはみ出て汚れるとか、シール溝５内のシール材８が偏って、シール性能が低下するおそれがあるという問題があった。
【０００４】
なお、シール材８がホットメルトのような液体ではなくゴム紐や発泡ガスケット等の固体で構成されている場合も、シール脚２をシール溝５に挿入する際にシール溝５外にシール材８がはみ出ることはないにしても、シール溝５内の凹凸係合部に対応する位置のシール材８が幅方向に押されてよじれ、シール性能が低下するおそれがあるという問題があった。
【０００５】
本発明は前記従来技術の問題点に鑑みなされたもので、その目的は、前面レンズのシール脚とランプボディのシール溝間に機械的締結手段である凹凸係合部を設けた車両用灯具におけるシール脚とシール溝間係合部におけるシール性能を改善することにある。
【０００６】
【課題を解決するための手段】
前記目的を達成するために、請求項１に係わる車両用灯具においては、前面レンズのシール脚の外側には凸部が設けられ、一方、前記シール脚が係合するランプボディのシール溝の外壁には、前記シール脚の凸部と協働して凹凸係合部を構成する凹部が設けられ、シール材を装填したシール溝にシール脚を挿入すると同時にシール脚の凸部がシール溝の凹部に係合してランプボディと前面レンズが機械的に締結される車両用灯具において、前記シール溝の底面壁に、少なくとも前記凹凸係合部に対応する領域にまたがりシール溝に沿って延びる薄肉部を設けるように構成した。なお、シール溝の底面壁における、前記凹凸係合部に対応する領域とは、シール溝の外壁に設けた凹部とシール溝延在方向において一致するシール溝底面壁の内側または外側をいう。
【０００７】
（作用）シール脚をシール溝に挿入する際に、シール脚（の凸部）とシール溝の外壁が干渉し互いに反力を受けるが、シール溝の外壁における凹凸係合部対応領域は、シール溝底面壁の薄肉部をヒンジとしてランプボディに対し弾性変形し易い（撓み易い）。このためシール脚はシール溝内側にほとんど撓むことなく、シール溝の外壁をシール溝幅方向外側に撓ませつつシール溝に挿入され、シール脚側の凸部がシール溝側の凹部に係合することで、撓んだシール溝の外壁が復元する。この外壁の復元の際には、シール溝内のシール材が外壁によって僅かに押圧されるにとどまり、従来構造のように、シール溝からシール材を掻き出したりシール溝幅方向にシール材を偏らせるほどの大きな押圧力は作用しない。
【０００８】
請求項２に係わる車両用灯具においては、前面レンズのシール脚の外側には凸部が設けられ、一方、前記シール脚が係合するランプボディのシール溝の外壁には、前記シール脚の凸部と協働して凹凸係合部を構成する凹部が設けられ、シール材を装填したシール溝にシール脚を挿入すると同時にシール脚の凸部がシール溝の凹部に係合してランプボディと前面レンズが機械的に締結される車両用灯具において、前記シール溝の外壁に、少なくとも前記凹凸係合部に対応する領域をはさみシール溝深さ方向に延びる一対の薄肉部を設けるように構成した。なお、シール溝の外壁の前記凹凸係合部に対応する領域とは、シール溝の外壁における凹部を挟む領域をいう。
【０００９】
（作用）シール脚をシール溝に挿入する際に、シール脚（の凸部）とシール溝の外壁が干渉し互いに反力を受けるが、シール溝の外壁におけるシール溝深さ方向に延びる一対の薄肉部で挟まれた凹凸係合部対応領域は、薄肉部をヒンジとして弾性変形し易い（撓み易い）。このためシール脚はシール溝内側にほとんど撓むことなく、シール溝の外壁をシール溝幅方向外側に撓ませつつシール溝に挿入され、シール脚側の凸部がシール溝側の凹部に係合することで、撓んだシール溝の外壁が復元する。この外壁の復元の際には、シール溝内のシール材が外壁によって僅かに押圧されるにとどまり、従来構造のように、シール溝からシール材を掻き出したりシール溝幅方向にシール材を偏らせるほどの大きな押圧力は作用しない。
【００１０】
請求項３に係わる車両用灯具においては、前面レンズのシール脚の外側には凸部が設けられ、一方、前記シール脚が係合するランプボディのシール溝の外壁には、前記シール脚の凸部と協働して凹凸係合部を構成する凹部が設けられ、シール材を装填したシール溝にシール脚を挿入すると同時にシール脚の凸部がシール溝の凹部に係合してランプボディと前面レンズが機械的に締結される車両用灯具において、前記シール溝の内壁の前記凹凸係合部に対応する領域であって前記シール溝の底面壁から離間する位置に、シール溝に挿入されるシール脚に当接してシール脚の内側への弾性変形を阻止する凸部を設けるように構成した。なお、シール溝の内壁における前記凹凸係合部に対応する領域とは、シール溝の内壁におけるシール溝の外壁側の凹部に向かい合う領域をいう。
【００１１】
（作用）シール脚をシール溝に挿入する際に、シール脚（の凸部）とシール溝の外壁が干渉し互いに反力を受けるが、シール脚における凹凸係合部対応領域は、シール溝の内壁に設けたシール脚当接用の凸部にバックアップされて、シール溝の内壁側への弾性変形が阻止される。このためシール脚はシール溝の内壁側にほとんど撓むことなく、シール溝の外壁側の凹凸係合部対応領域をシール溝幅方向外側に撓ませつつシール溝に挿入され、シール脚側の凸部がシール溝側の凹部に係合することで、撓んだシール溝の外壁が復元する。この外壁の復元の際には、シール溝内のシール材が外壁によって僅かに押圧されるにとどまり、従来構造のように、シール溝からシール材を掻き出したりシール溝幅方向にシール材を偏らせるほどの大きな押圧力は作用しない。
【００１２】
また、凹凸係合部対応領域におけるシール溝とシール脚間に介在するシール材は、シール脚当接用の凸部相当だけ減少するが、この減少量は僅かで、しかもシール脚先端部側ではシール溝との間にシール材が連続して介在されているので、シール脚にシール脚当接用の凸部を設けることによりシール性能が低下することはない。
【００１３】
請求項４に係わる車両用灯具においては、請求項１〜３のいずれかに記載の車両用灯具において、前記シール溝の外壁における前記凹凸係合部に対応する領域にシール溝後方に延びる舌片状の延出部を設け、シール溝にシール脚を挿入する際に、前記舌片状の延出部をシール溝幅方向内側に押圧して前記シール溝の外壁における凹凸係合部対応領域をシール溝幅方向外側に弾性変形させるように構成した。
【００１４】
（作用）シール溝の外壁における凹凸係合部対応領域は、舌片状の延出部が設けられることで、その剛性が高められており、舌片状の延出部をシール溝幅方向内側に押圧すると、シール溝の外壁における凹凸係合部対応領域がシール溝幅方向外側にスムーズに撓む。このため、シール脚をシール溝に挿入する際に、外力を作用させて舌片状の延出部をシール溝幅方向内側に押圧して、シール溝の外壁における凹凸係合部対応領域をシール溝幅方向外側に強制的に撓ませた形態にすることで、シール脚をシール溝の外壁と干渉させずにシール溝に挿入でき、舌片状の延出部への外力の作用を解除すれば、撓んだシール溝の外壁が復元して、シール溝の外壁の凹部がシール脚の凸部に係合する。
【００１５】
請求項５に係わるランプボディと前面レンズの組み付け方法においては、前面レンズのシール脚の外側には凸部が設けられ、一方、前記シール脚が係合するランプボディのシール溝の外壁には、前記シール脚の凸部と協働して凹凸係合部を構成する凹部が設けられ、シール材を装填したシール溝にシール脚を挿入すると同時にシール脚の凸部がシール溝の凹部に弾性係合してランプボディと前面レンズが機械的に締結されるランプボディと前面レンズの組み付け方法において、前記シール溝の外壁における前記凹凸係合部に対応する領域に、シール溝後方に延びる舌片状の延出部を設け、前記シール脚をシール溝に挿入する際に、前記舌片状の延出部をシール溝幅方向内側に押圧して前記シール溝の外壁における凹凸係合部対応領域をシール溝幅方向外側に撓ませるように構成した。なお、シール溝の外壁における前記凹凸係合部に対応する領域とは、シール溝の外壁における凹部を含む領域をいう。
【００１６】
（作用）シール溝の外壁における凹凸係合部対応領域は、舌片状の延出部が設けられることで、その剛性が高められており、舌片状の延出部をシール溝幅方向内側に押圧すると、シール溝の外壁における凹凸係合部対応領域がシール溝幅方向外側に撓む。このため、シール脚をシール溝に挿入する際に、外力を作用させて舌片状の延出部をシール溝幅方向内側に押圧して、シール溝の外壁における凹凸係合部対応領域をシール溝幅方向外側に強制的に撓ませた形態にすることで、シール脚をシール溝の外壁と干渉させずにシール溝に挿入でき、舌片状の延出部への外力の作用を解除すれば、撓んだシール溝の外壁が復元して、シール溝の外壁の凹部がシール脚の凸部に係合する。
【００１７】
特に、シール脚のシール溝への挿入に連係して、舌片状の延出部をシール溝幅方向内側に押圧してシール溝の外壁における凹凸係合部対応領域をシール溝幅方向外側に強制的に撓ませるようにすれば、舌片状の延出部に作用させる押圧力の作用時間が短時間でよい。
【００１８】
請求項６においては、請求項５記載のランプボディと前面レンズの組み付け方法において、前記シール溝の底面壁に少なくとも前記凹凸係合部に対応する領域にまたがりシール溝に沿って延びる薄肉部を設け、または／および前記シール溝の外壁に少なくとも前記凹凸係合部に対応する領域をはさみシール溝深さ方向に延びる一対の薄肉部を設けて、前記シール溝の外壁における前記凹凸係合部対応領域をシール溝幅方向に撓み易いように構成した。
【００１９】
（作用）シール溝の底面壁にシール溝に沿って延びる薄肉部を設けたり、または／およびシール溝の外壁にシール溝深さ方向に延びる一対の薄肉部を設けたことで、シール溝の外壁はシール溝幅方向外側に撓み易いので、舌片状の延出部をシール溝幅方向内側に押圧した場合のシール溝の外壁における凹凸係合部対応領域の撓み量が大きく、それだけシール溝にシール脚を挿入する際にシール溝の外壁を外側に弾性変形させる（撓ませる）ために必要な力が小さくてよい。
【００２０】
【発明の実施の形態】
次に、本発明の実施の形態を実施例に基づいて説明する。
【００２１】
図１〜図５は本発明の第１の実施例を示すもので、図１は本発明の第１の実施例であるクリアランスランプの正面図、図２は同ランプの水平断面図（図１に示す線ＩＩ−ＩＩに沿う断面図）、図３は同ランプにおけるシール脚とシール溝間係合部を凹凸係合部位置で切断した縦断面図（図１に示す線ＩＩＩ−ＩＩＩに沿う断面図）、図４はシール脚とシール溝間係合部の分解斜視図、図５はシール脚をシール溝に挿入して前面レンズをランプボディに組み付ける工程の説明図である。
【００２２】
これらの図において、符号１０は、前面が開口する容器状の合成樹脂製ランプボディで、ランプボディ１０の背面壁に設けられたバルブ挿着孔１１には光源であるバルブ１２が挿着され、ランプボディ１０の前面開口部には、クリアーな合成樹脂製前面レンズ２０が組み付けられている。
【００２３】
符号１４は、ランプボディ１０の前面開口部周縁に周設された横断面コ字型のシール溝で、前面レンズ２０のシール脚２２が係合するシール溝１４には、シール材であるホットメルト１３が装填されて、防水がとられている。シール脚２２は、前面レンズ２０の表面に対し略直交し、バルブ１２の軸Ｌと平行な方向に立壁状に延出し、一方、シール溝１４を構成する内壁１５および外壁１６もシール脚２２と平行に延出して、バルブ１２の出射光がシール溝１４やシール脚２２に遮光されず、前面レンズ２０の前方に広範囲に照射されるようになっている。
【００２４】
またシール脚２２の先端部の外側には、図１に示されるように、上下２箇所ずつ合計４カ所に凸部である突起２４が設けられ、一方、シール溝１４の外壁１６には、シール脚２２側の突起２４が係合できる凹部である係合孔１８が設けられている。即ち、シール脚２２の先端部に設けられた突起２４と、シール溝１４の外壁１６に設けられた係合孔１８によって凹凸係合部３０が構成されており、シール脚２２をシール溝１４に係合させると同時に、シール脚２２の突起２４がシール溝１４の係合孔１８に係合して、前面レンズ２０はランプボディ１０に対し位置決めされた形態に機械的に締結される。
【００２５】
また、シール溝１４の底面壁１７における凹凸係合部３０に対応する領域には、底面壁１７に断面が半円状の溝を形成することで、シール溝１４の幅方向ほぼ中央部においてシール溝１４に沿って延びる薄肉部１９ａが設けられて、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ａがシール溝１４の他の領域に比べて撓み易くなっている。即ち、シール溝底面壁１７の裏側の凹凸係合部３０に対応する領域（シール溝１４の延在方向において係合孔１８と一致する位置）に薄肉部１９ａが設けられて、凹凸係合部対応領域１４Ａが撓み易い。このため、シール脚２２をシール溝１４に挿入してシール脚２２側の突起２４をシール溝１４側の係合孔１８に係合（以下、凹凸係合という）させる際に、スムーズに係合させることができるとともに、従来構造のようにシール溝１４からホットメルト１３が掻き出されたりシール溝幅方向にホットメルト１３が偏るといった不具合がない。
【００２６】
即ち、シール脚２２をシール溝１４に挿入する際に、シール脚２２（の突起２４）とシール溝１４の外壁１６が干渉し互いに反力を受けるが、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ａは、シール溝底面壁１７の薄肉部１９ａをヒンジとしてランプボディ１０に対し弾性変形し易い（撓み易い）。このため、シール脚２２は、ほとんど撓むことなく、図５（ａ）矢印Ｂに示すようにシール溝１４の外壁１６をシール溝幅方向外側に撓ませつつ、図５（ａ）矢印Ａに示すようにシール溝１４に真っ直ぐに挿入され、シール脚２２側の突起２４がシール溝１４側の係合孔１８に係合することで、図５（ｂ）矢印Ｃに示すように、撓んだシール溝１４の外壁１６が復元する。この外壁１６の復元の際には、シール溝１４内のホットメルト１３が外壁１６によって僅かに押圧されるにとどまり、従来構造のように、シール溝１４からホットメルト１３を掻き出したりシール溝幅方向にホットメルト１３を偏らせるほどの大きな押圧力は作用しない。
【００２７】
図６は、本発明の第２の実施例であるクリアランスランプを示し、（ａ）は同ランプを凹凸係合部位置で切断したシール脚とシール溝間係合部の縦断面図、（ｂ）はシール溝の斜視図である。
【００２８】
前記した第１の実施例では、シール溝１４の底面壁１７の外側をへこませることで薄肉部１９ａが構成されているが、この第２の実施例では、シール溝１４の底面壁１７の内側をへこませることで薄肉部１９ａが構成されて、薄肉部１９ａが外部に露呈しない構造となっている。
【００２９】
また、シール溝１４の外壁１６は、内壁１５よりも高く形成されるとともに、凹凸係合部３０を構成する係合孔１８は、外壁１６における内壁１５よりも高い位置に設けられており、シール脚２２をシール溝１４に挿入する際の外壁１６（シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｂ）の撓み量が大きく、それだけ凹凸係合（前面レンズ２０のランプボディ１０への組み付け）がスムーズとなる。
【００３０】
図７は、本発明の第３の実施例であるクリアランスランプを示し、（ａ）は同ランプを凹凸係合部位置で切断したシール脚とシール溝間係合部の縦断面図、（ｂ）はシール溝の斜視図である。
【００３１】
前記した第１，第２の実施例では、底面壁１７の上面または下面に断面が半円状の溝を形成することで、シール溝１４の幅方向ほぼ中央部においてシール溝１４に沿って延びる薄肉部１９ａが設けられているが、この第３の実施例では、底面壁１７の下面に断面がＶ字状の溝を形成することで、シール溝１４の幅方向ほぼ中央部においてシール溝１４に沿って延びる薄肉部１９ａが設けられて、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｂ’の撓み量が大きくなるように構成されている。
【００３２】
その他は、前記第２の実施例と同一であり、同一の符号を付すことで、その詳細な説明は省略する。
【００３３】
図８は、本発明の第４の実施例であるクリアランスランプを示し、（ａ）は同ランプを凹凸係合部位置で切断したシール脚とシール溝間係合部の縦断面図、（ｂ）はシール溝の斜視図である。
【００３４】
この第４の実施例では、外壁１６の凹凸係合部３０に対応する領域（係合孔１８形成位置の後方）に係合孔１８の巾よりも幾分大きい巾の舌片状の後方延出部４０が設けられて、シール溝の外壁１６側の凹凸係合部対応領域１４Ｃの横断面がＴ字型に形成されるとともに、後方延出部４０の付け根４１が厚肉に形成されて、シール溝の凹凸係合部対応領域１４Ｃの剛性が高められている。このため、シール脚２２をシール溝１４に挿入する際に、シール溝１４の外壁１６に作用する押圧力が薄肉部１９ａに集中して、凹凸係合部対応領域１４Ｃを効果的に撓ませることができる。
【００３５】
その他は、前記第１の実施例と同一であり、同一の符号を付すことで、その詳細な説明は省略する。
【００３６】
図９は本発明の第５の実施例であるクリアランスランプを示し、（ａ）は同ランプのシール溝とシール脚の分解斜視図、（ｂ）はシール脚をシール溝に挿入して凹凸係合させる様子を示す斜視図である。
【００３７】
前記した第１〜第４の実施例では、シール溝１４の底面壁１７に薄肉部１９が設けられているが、この第４の実施例では、シール溝１４の外壁１６に薄肉部１９ｂが設けられている。即ち、外壁１６の凹凸係合部３０に対応する領域（外壁１６の係合孔１８を含む領域）には、シール溝深さ方向に延びる薄肉部１９ｂが凹凸係合部３０を構成する係合孔１８を挟むように一対設けられて、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｄは一対の薄肉部１９ｂ，１９ｂをヒンジとして弾性変形し易い（撓み易い）。
【００３８】
したがって、シール脚２２をシール溝１４に挿入する際には、図９（ｂ）に示すように、シール脚２２は、ほとんど撓むことなく、シール溝１４の外壁１６をシール溝幅方向外側に撓ませつつシール溝１４に挿入され、撓んだシール溝１４の外壁１６が復元して凹凸係合する。
【００３９】
なお、凹凸係合部３０に対応する外壁１６に設ける薄肉部１９ｂは、外壁１６の内側に設けるようにしてもよく、薄肉部１９ｂが外に露呈しない分、体裁がよい。
【００４０】
また、前記した第１〜第５の実施例では、シール溝１４の底面壁１７または外壁１６に薄肉部１９ａ，１９ｂが設けられて、シール溝の凹凸係合部対応領域が撓み易い構造となっているが、シール溝１４の底面壁１７または外壁１６のそれぞれに薄肉部１９ａ，１９ｂを設けるようにすれば、シール溝の外壁１６側の凹凸係合部対応領域はより撓み易い構造となって、よりスムーズに前面レンズをランプボディに組み付けることができる。
【００４１】
図１０，１１は、本発明の第６の実施例であるクリアランスランプを示し、図１０は同ランプにおけるシール脚とシール溝間の凹凸係合部の分解斜視図、図１１はシール脚をシール溝に挿入して前面レンズをランプボディに組み付ける工程の説明図である。
【００４２】
前記した第１〜第５の実施例では、シール溝１４の底面壁１５または／および外壁１６の凹凸係合部３０に対応する領域に薄肉部１９ａ，１９ｂを設けて、シール溝の外壁側の凹凸係合部対応領域を撓み易くすることで、シール脚２２をシール溝１４に挿入する際に、シール脚２２に押されたシール溝１４の外壁１６が無理なく撓んで、凹凸係合による前面レンズ２０とランプボディ１０の機械的締結をスムーズに遂行できるというものであるが、この第６の実施例では、前記実施例のように薄肉部１９ａ，１９ｂを設けることはせず、シール溝１４の外壁１６における凹凸係合部３０に対応する領域（外壁１６の係合孔１８を含む領域の後方）に、シール溝１４の後方に延びる舌片状の延出部４２を設けることで、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｅは、横断面Ｔ字型となってその剛性が高められており、シール脚２２をシール溝１４に挿入する際に、エアシリンダーなどの突き押し手段Ｐを用いて舌片状の延出部４２をシール溝幅方向内側に押圧して、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｅがランプボディ１０に対し揺動してシール溝幅方向外側に撓むようになっている。
【００４３】
即ち、まず、図１１（ａ）に示すように、ホットメルト１３を装填したシール溝１４の上方にシール脚２２が対向するように、前面レンズ２０を配置する。次に、前面レンズ２０（シール脚２２）の下降に先んじて、または前面レンズ２０（シール脚２２）を下降させると同時に、エアシリンダなどの突き押し手段Ｐで舌片状の延出部４２をシール溝幅方向内側に押圧する。舌片状の延出部４２が突き押しされることで、シール溝の外壁１６側の凹凸係合部対応領域１４Ｅは、図１１（ｂ）に示すように、シール溝幅方向外側に撓む。このため、下降するシール脚２２はシール溝の外壁１６と干渉することなくシール溝１４内に挿入される。そして、エアシリンダなどの突き押し手段Ｐによる舌片状の延出部４２への外力の作用を解除すれば、撓んだシール溝の外壁１６が復元して、シール溝の外壁１６の係合孔１８がシール脚２２の突起２４に係合する（凹凸係合する）。
【００４４】
特に、シール脚２２のシール溝１４への挿入に連係して、エアシリンダなどの突き押し手段Ｐによる舌片状の延出部４２の突き押し動作を行うように構成すれば、舌片状の延出部４２に作用させる押圧力の作用時間が短時間ですみ、前面レンズ２０をランプボディ１０に組み付ける工程時間も短縮できる。
【００４５】
図１２は、本発明の第７の実施例であるクリアランスランプにおけるシール脚とシール溝間の凹凸係合部の分解斜視図である。
【００４６】
この実施例では、シール溝１４の底面壁１７および外壁１６における凹凸係合部３０に対応する領域（シール溝延在方向において係合孔１８形成位置と一致する領域）薄肉部１９ａ，１９ｂを設けて、シール溝の外壁１６側の凹凸係合部対応領域１４Ｆを撓み易い構造とするとともに、シール溝１４の外壁１６における凹凸係合部３０に対応する領域に、シール溝後方に延びる舌片状の延出部４２を設けて、前記した第６の実施例と同様、シール脚２２をシール溝１４に挿入する際に、エアシリンダーなどの突き押し手段Ｐを用いて舌片状の延出部４２をシール溝幅方向内側に押圧して、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｆをシール溝幅方向外側に強制的に撓ませるようにしたものである。
【００４７】
シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｆ自体が撓み易い構造であるため、舌片状の延出部４２をシール溝幅方向内側に押圧した場合におけるシール溝の凹凸係合部対応領域１４Ｆの撓み量が大きく、それだけシール溝の外壁１６を外側に弾性変形させる（撓ませる）ために必要な押圧力（エアシリンダなどの突き押し手段Ｐの付勢力）が小さくてよい。
【００４８】
図１３は本発明の第８の実施例であるクリアランスランプを示し、（ａ）は同ランプのシール溝の斜視図、（ｂ），（ｃ）はシール脚をシール溝に挿入して前面レンズをランプボディに組み付ける工程の説明図である。
【００４９】
この第８の実施例では、シール溝１４の内壁１５における凹凸係合部３０に対応する領域（外壁１６の係合孔１８に向かい合う内壁１５の上部領域）に、シール溝１４に挿入されるシール脚２２に当接してシール脚２２の内壁１４側への弾性変形を阻止する凸部１５ａが設けられた構造となっている。
【００５０】
即ち、シール脚２２をシール溝１４に挿入する際に、シール脚２２（の凸部２４）とシール溝１４の外壁１６が干渉し互いに反力を受けるが、シール脚２２は、シール溝の内壁１５に設けたシール脚当接用の凸部１５ａにバックアップされて、シール溝の内壁１４側への弾性変形が阻止されるので、図１３（ｂ）に示すように、シール脚２２はシール溝の内壁１５側にほとんど撓むことなく、シール溝１４の外壁１６側の凹凸係合部対応領域１４Ｇをシール溝幅方向外側に撓ませつつシール溝１４に挿入され、図１３（ｃ）に示すように、シール脚側の突起２４がシール溝側の係合孔１８に係合することで、撓んだシール溝の外壁１６が復元する。この外壁１６の復元の際には、シール溝１４内のシール材１３が外壁１６によって僅かに押圧されるにとどまり、従来構造のように、シール溝からシール材を掻き出したりシール溝幅方向にシール材を偏らせるほどの大きな押圧力は作用しない。
【００５１】
また、凹凸係合部対応領域１４Ｇにおけるシール溝１４とシール脚２２間に介在するシール材１３は、シール脚当接用の凸部１５ａ相当だけ減少するが、この減少量は僅かで、しかもシール脚２２の先端部側ではシール溝１４との間にシール材１３が連続して介在され（シール溝底面壁１７の内側から凸部１５ａ下方の溜まり部１４ａにかけてシール材１３が介在され）ているので、シール性能が低下することもない。
【００５２】
また、この凸部１５ａは、係合孔１８の横幅に等しい横長のシリンドリカル型で、凸部１５ａのシール溝開口側１５ａ１が曲面で形成されている分、シール脚２２の挿入がスムーズである。なお、凸部１５ａは横長に限られるものではなく、例えば半球状突起型（図示せず）でもよい。
【００５３】
また、前記した第８の実施例において、第１〜第５の実施例に示すように、シール溝１４の底面壁１７や外壁１６に薄肉部１９ａ，１９ｂを設ける構成および／または第６の実施例に示すように、シール溝１４の外壁１６をシール溝幅方向内側に押圧する突き押し手段Ｐを設ける構成を適宜組み合わせるようにしてもよい。
【００５４】
また、前記した種々の実施例では、シール溝１４に装填されるシール材を液体（ホットメルト１３）として説明したが、ホットメルトのような液体ではなくゴム紐や発泡ガスケットといった固体で構成されている場合も有効である。即ち、従来では、シール脚をシール溝に挿入する際に、シール溝内の凹凸係合部に対応する位置のシール材が幅方向に押されてよじれシール性能が低下するおそれがあったが、シール脚をシール溝に挿入する際に、シール溝内の凹凸係合部に対応する位置のシール材が幅方向に押されないことから、シール材がよじれてシール性能が低下することもない。
【００５５】
【発明の効果】
以上の説明から明らかなように、請求項１に係る車両用灯具によれば、シール脚をシール溝に挿入する際に、シール脚はシール溝の外壁を外側に撓ませつつ自らは殆ど撓むことなくシール溝に真っ直ぐに挿入されるので、シール材がシール溝からはみ出たり、シール溝内のシール材が溝幅方向に偏ることがないので、シール脚とシール溝の係合部全周における均一なシール性能を確保できる。
【００５６】
請求項２に係る車両用灯具によれば、シール脚をシール溝に挿入する際に、シール脚はシール溝の外壁を外側に撓ませつつ自らは殆ど撓むことなくシール溝に真っ直ぐに挿入されるので、シール材がシール溝からはみ出たり、シール溝内のシール材が溝幅方向に偏ることがないので、シール脚とシール溝の係合部全周における均一なシール性能を確保できる。
【００５７】
請求項３に係る車両用灯具によれば、シール脚をシール溝に挿入する際に、シール脚はシール溝の外壁を外側に撓ませつつ自らは殆ど撓むことなくシール溝に真っ直ぐに挿入されるので、シール材がシール溝からはみ出たり、シール溝内のシール材が溝幅方向に偏ることがないので、シール脚とシール溝の係合部全周における均一なシール性能を確保できる。
【００５８】
請求項４に係る車両用灯具によれば、シール脚をシール溝に挿入する際に、シール溝の外壁と干渉することなくシール脚をシール溝に挿入しシール脚の凸部とシール溝の凹部を係合させることができるので、前面レンズをランプボディにスムーズに組み付けることができる。また、シール溝の外壁を撓ませるための力は僅かでよく、前面レンズをランプボディに組み付けるための設備も簡潔となる。
【００５９】
請求項５に係るランプボディと前面レンズの組み付け方によれば、シール脚をシール溝に挿入する際に、シール溝の外壁と干渉させることなくシール脚をシール溝に挿入してシール脚の凸部をシール溝の凹部に係合させることができるので、前面レンズをランプボディにスムーズに組み付けることができる。
【００６０】
請求項６によれば、シール脚をシール溝に挿入する際に、僅かな押圧力を舌片状の延出部に作用させるだけで、シール溝の外壁と干渉させることなくシール脚をシール溝に挿入してシール脚の凸部をシール溝の凹部に係合させることができるので、前面レンズをランプボディによりスムーズに組み付けることができるとともに、その設備も簡潔となる。
【図面の簡単な説明】
【図１】本発明の第１の実施例であるクリアランスランプの正面図である。
【図２】同ランプの水平断面図（図１に示す線ＩＩ−ＩＩに沿う断面図）である。
【図３】同ランプにおけるシール脚とシール溝間係合部を凹凸係合部位置で切断した縦断面図（図１に示す線ＩＩＩ−ＩＩＩに沿う断面図）である。
【図４】シール脚とシール溝間係合部の分解斜視図である。
【図５】シール脚をシール溝に挿入して前面レンズをランプボディに組み付ける工程の説明図である
【図６】本発明の第２の実施例であるクリアランスランプを示し、（ａ）は同ランプを凹凸係合部位置で切断したシール脚とシール溝間係合部の縦断面図、（ｂ）はシール溝の斜視図である。
【図７】本発明の第３の実施例であるクリアランスランプを示し、（ａ）は同ランプを凹凸係合部位置で切断したシール脚とシール溝間係合部の縦断面図、（ｂ）はシール溝の斜視図である。
【図８】本発明の第４の実施例であるクリアランスランプを示し、（ａ）は同ランプを凹凸係合部位置で切断したシール脚とシール溝間係合部の縦断面図、（ｂ）はシール溝の斜視図である。
【図９】本発明の第５の実施例であるクリアランスランプを示し、（ａ）は同ランプのシール溝とシール脚の分解斜視図、（ｂ）はシール脚をシール溝に挿入して凹凸係合させる様子を示す斜視図である。
【図１０】本発明の第６の実施例であるクリアランスランプにおけるシール脚とシール溝間の凹凸係合部の分解斜視図である。
【図１１】シール脚をシール溝に挿入して前面レンズをランプボディに組み付ける工程の説明図である。
【図１２】本発明の第７の実施例であるクリアランスランプにおけるシール脚とシール溝間の凹凸係合部の分解斜視図である。
【図１３】本発明の第８の実施例であるクリアランスランプを示し、（ａ）は同ランプのシール溝の斜視図、（ｂ），（ｃ）はシール脚をシール溝に挿入して前面レンズをランプボディに組み付ける工程の説明図である。
【図１４】従来の灯具の凹凸係合部位置における縦断面図である。
【図１５】従来の灯具におけるシール脚とシール溝の組み付け工程を示す説明図である。
【符号の説明】
１０　ランプボディ
１２　光源であるバルブ
１３　シール材であるホットメルト
１４　シール溝
１４Ａ、１４Ｂ、１４Ｂ’、１４Ｃ、１４Ｄ，１４Ｅ、１４Ｆ、１４Ｇ　シール溝の外壁側の凹凸係合部対応領域
１５　シール溝の内壁
１５ａ　シール脚当接用の凸部
１６　シール溝の外壁
１７　シール溝の底面壁
１８　凹凸係合部を構成する係合孔（凹部）
１９ａ　シール溝の底面壁に設けた薄肉部
１９ｂ　シール溝の外壁に設けた薄肉部
２０　前面レンズ
２２　シール脚
２４　凹凸係合部を構成する突起（凸部）
３０　凹凸係合部
４０，４２　舌片状の後方延出部
Ｐ　舌片状の延出部のシール溝幅方向内側への突き押し手段[0001]
According to the present invention, a convex portion is provided on the outer side of the seal leg of the front lens, while the outer wall of the seal groove of the lamp body with which the seal leg is engaged is provided with concave and convex engagement in cooperation with the convex portion of the seal leg. A concave portion is provided, and the convex portion of the seal leg is engaged with the concave portion of the seal groove at the same time when the seal leg is inserted into the seal groove loaded with the sealing material, so that the lamp body and the front lens are mechanically fastened. The present invention relates to a vehicle lamp and a method of assembling a lamp body and a front lens.
[0002]
[Prior art]
As shown in FIG. 14, a projection (projection) 3a is provided on the outside of the seal leg 2 of the front lens 1, while the seal of the lamp body 4 is engaged with the seal leg 2, as shown in FIG. The outer wall 6 of the groove 5 is provided with a concave portion (engaging hole) 3b which forms the concave-convex engaging portion 3 in cooperation with the convex portion 3a of the seal leg 2. Then, as shown in FIGS. 15 (a), (b) and (c), the sealing leg 2 is inserted into the sealing groove 5 in which the sealing material 8 such as hot melt is loaded, and at the same time, the projection 3a of the sealing leg 2 is A structure in which the lamp body 4 and the front lens 1 are mechanically fastened by being elastically engaged with the concave portions 3 b of the seal groove 5, and waterproofing is secured by the seal material 8 at the engagement portion between the seal groove 5 and the seal leg 2. It has become.
[0003]
[Problems to be solved by the invention]
However, in the conventional structure described above, when the seal leg 2 is inserted into the seal groove 5, (the convex portion 3 a of) the seal leg 2 that interferes with the outer wall 6 of the seal groove 5 is bent inward of the seal groove 5. As shown in FIGS. 15B and 15C, when the seal leg 2 is restored at the stage where it is inserted into the seal groove 5 and the convex portion 3a on the seal leg 2 engages the concave portion 3b on the seal groove 5 side. In addition, the seal leg 2 scrapes out the seal material 8 in the seal groove 5 and the seal material 8 protrudes from the concave portion (engagement hole) 3b and becomes dirty. There was a problem that there is a risk of doing so.
[0004]
When the sealing material 8 is made of a solid material such as a rubber string or a foam gasket instead of a liquid such as hot melt, the sealing material 8 is placed outside the sealing groove 5 when the sealing leg 2 is inserted into the sealing groove 5. Even if it does not protrude, there is a problem that the sealing material 8 at a position corresponding to the concave / convex engaging portion in the sealing groove 5 is pushed and kinked in the width direction, and the sealing performance may be deteriorated.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art described above, and has as its object to provide a vehicular lamp in which a concave / convex engaging portion serving as mechanical fastening means is provided between a sealing leg of a front lens and a sealing groove of a lamp body. An object of the present invention is to improve the sealing performance at an engagement portion between a seal leg and a seal groove.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the vehicle lamp according to claim 1, a convex portion is provided outside a seal leg of the front lens, while an outer wall of a seal groove of a lamp body with which the seal leg is engaged. Is provided with a concave portion which forms a concave-convex engaging portion in cooperation with the convex portion of the seal leg, and the convex portion of the seal leg is simultaneously inserted into the seal groove in which the sealing material is loaded. A vehicle body in which the lamp body and the front lens are mechanically fastened by being engaged with a thin wall portion extending along the seal groove over at least a region corresponding to the concave-convex engagement portion on the bottom wall of the seal groove. Was provided. In addition, the area | region corresponding to the said uneven | corrugated engagement part in the bottom wall of a seal groove means the inside or outside of the seal groove bottom wall which matches with the recessed part provided in the outer wall of the seal groove in the seal groove extending direction.
[0007]
(Function) When the seal leg is inserted into the seal groove, the seal leg (the convex portion) and the outer wall of the seal groove interfere with each other and receive a reaction force with each other. The thin wall portion of the groove bottom wall is used as a hinge to easily elastically deform (bend) the lamp body. For this reason, the seal leg is inserted into the seal groove while bending the outer wall of the seal groove outward in the seal groove width direction without substantially bending inward of the seal groove, and the convex portion on the seal leg side engages with the concave portion on the seal groove side. By doing so, the outer wall of the bent seal groove is restored. When the outer wall is restored, the seal material in the seal groove is only slightly pressed by the outer wall, and the seal material is scraped out of the seal groove or biased in the seal groove width direction as in the conventional structure. A large pressing force does not work.
[0008]
In the vehicle lamp according to claim 2, a convex portion is provided outside the seal leg of the front lens, while a convex portion of the seal leg is formed on an outer wall of a seal groove of the lamp body with which the seal leg engages. A concave portion that forms a concave-convex engaging portion in cooperation with the portion is provided, and at the same time when the seal leg is inserted into the seal groove loaded with the sealing material, the convex portion of the seal leg engages with the concave portion of the seal groove and engages with the lamp body. In the vehicle lamp to which the front lens is mechanically fastened, a pair of thin portions extending in the depth direction of the seal groove are provided on the outer wall of the seal groove, with at least a region corresponding to the concave-convex engagement portion interposed therebetween. . In addition, the area | region corresponding to the said uneven | corrugated engagement part of the outer wall of a seal groove means the area | region which sandwiches the recessed part in the outer wall of a seal groove.
[0009]
(Operation) When the seal leg is inserted into the seal groove, the seal leg (the convex portion) and the outer wall of the seal groove interfere with each other and receive a reaction force with each other, but a pair of seal walls extending in the seal groove depth direction on the outer wall of the seal groove. The region corresponding to the concave-convex engagement portion sandwiched between the thin portions is easily elastically deformed (easily bent) using the thin portion as a hinge. For this reason, the seal leg is inserted into the seal groove while bending the outer wall of the seal groove outward in the seal groove width direction without substantially bending inward of the seal groove, and the convex portion on the seal leg side engages with the concave portion on the seal groove side. By doing so, the outer wall of the bent seal groove is restored. When the outer wall is restored, the seal material in the seal groove is only slightly pressed by the outer wall, and the seal material is scraped out of the seal groove or biased in the seal groove width direction as in the conventional structure. A large pressing force does not work.
[0010]
In the vehicular lamp according to claim 3, a convex portion is provided outside the seal leg of the front lens, while a convex portion of the seal leg is provided on an outer wall of a seal groove of the lamp body with which the seal leg engages. A concave portion that forms a concave-convex engaging portion in cooperation with the portion is provided, and at the same time when the seal leg is inserted into the seal groove loaded with the sealing material, the convex portion of the seal leg engages with the concave portion of the seal groove and engages with the lamp body. In the vehicle lighting device to which the front lens is mechanically fastened, the sealing groove is inserted into the sealing groove in a region corresponding to the concave-convex engagement portion of the inner wall of the sealing groove and at a position separated from the bottom wall of the sealing groove. A configuration is provided in which a convex portion that abuts on the seal leg to prevent elastic deformation inside the seal leg is provided. In addition, the area | region corresponding to the said uneven | corrugated engagement part in the inner wall of a seal groove means the area | region facing the recessed part in the outer wall side of the seal groove in the inner wall of the seal groove.
[0011]
(Operation) When the seal leg is inserted into the seal groove, the seal leg (the convex portion) and the outer wall of the seal groove interfere with each other and receive a reaction force with each other. It is backed up by the projection for contacting the seal leg provided on the inner wall, and elastic deformation of the seal groove toward the inner wall is prevented. For this reason, the seal leg is inserted into the seal groove while bending the region corresponding to the concave / convex engagement portion on the outer wall side of the seal groove to the outer side in the seal groove width, without substantially bending to the inner wall side of the seal groove. The outer wall of the bent seal groove is restored by engaging the portion with the concave portion on the seal groove side. When the outer wall is restored, the seal material in the seal groove is only slightly pressed by the outer wall, and the seal material is scraped out of the seal groove or biased in the seal groove width direction as in the conventional structure. A large pressing force does not work.
[0012]
In addition, the seal material interposed between the seal groove and the seal leg in the region corresponding to the concave-convex engagement portion is reduced by an amount corresponding to the convex portion for abutting the seal leg. Since the seal material is continuously interposed between the seal groove and the seal groove, the sealing performance does not decrease by providing the seal leg with the convex portion for contacting the seal leg.
[0013]
The vehicle lighting device according to claim 4, wherein the tongue piece extending rearward of the seal groove in a region corresponding to the concave-convex engagement portion on the outer wall of the seal groove in the vehicle light device according to any one of claims 1 to 3. When inserting the sealing leg into the seal groove, the tongue-shaped extending portion is pressed inward in the seal groove width direction to insert the concave / convex engaging portion corresponding region on the outer wall of the seal groove. It was configured to be elastically deformed outward in the seal groove width direction.
[0014]
(Function) The tongue-shaped extension portion is provided in the region corresponding to the concave-convex engagement portion on the outer wall of the seal groove so that the rigidity thereof is increased, and the tongue-shaped extension portion is placed inside the seal groove width direction. , The region corresponding to the concave-convex engagement portion on the outer wall of the seal groove is smoothly bent outward in the seal groove width direction. For this reason, when inserting the seal leg into the seal groove, an external force is applied to press the tongue-shaped extending portion inward in the seal groove width direction to seal the region corresponding to the concave and convex engaging portion on the outer wall of the seal groove. By forcibly bending outward in the groove width direction, the seal leg can be inserted into the seal groove without interfering with the outer wall of the seal groove, and the action of the external force on the tongue-shaped extension is released. If the outer wall of the bent seal groove is restored, the concave portion of the outer wall of the seal groove engages with the convex portion of the seal leg.
[0015]
In the method for assembling a lamp body and a front lens according to claim 5, a convex portion is provided outside a seal leg of the front lens, while an outer wall of a seal groove of the lamp body with which the seal leg is engaged has: A concave portion forming an uneven engaging portion is provided in cooperation with the convex portion of the seal leg. The convex portion of the seal leg is elastically engaged with the concave portion of the seal groove at the same time as the seal leg is inserted into the seal groove loaded with the sealing material. In a method for assembling a lamp body and a front lens, wherein the lamp body and the front lens are mechanically fastened together, in a region corresponding to the concave-convex engagement portion on an outer wall of the seal groove, a tongue piece extending rearward of the seal groove is provided. When the sealing leg is inserted into the sealing groove, the tongue-shaped extending portion is pressed inward in the width direction of the sealing groove so that the uneven wall corresponding region on the outer wall of the sealing groove is formed. sticker Configured to deflect outward in the width direction. In addition, the area | region corresponding to the said uneven | corrugated engagement part in the outer wall of a seal groove means the area | region containing the recessed part in the outer wall of a seal groove.
[0016]
(Function) The tongue-shaped extension portion is provided in the region corresponding to the concave-convex engagement portion on the outer wall of the seal groove so that the rigidity thereof is increased, and the tongue-shaped extension portion is placed inside the seal groove width direction. , The region corresponding to the concave-convex engagement portion on the outer wall of the seal groove bends outward in the seal groove width direction. For this reason, when inserting the seal leg into the seal groove, an external force is applied to press the tongue-shaped extending portion inward in the seal groove width direction to seal the region corresponding to the concave and convex engaging portion on the outer wall of the seal groove. By forcibly bending outward in the groove width direction, the seal leg can be inserted into the seal groove without interfering with the outer wall of the seal groove, and the action of the external force on the tongue-shaped extension is released. If the outer wall of the bent seal groove is restored, the concave portion of the outer wall of the seal groove engages with the convex portion of the seal leg.
[0017]
In particular, in conjunction with the insertion of the seal leg into the seal groove, the tongue-shaped extending portion is pressed inward in the seal groove width direction so that the concave / convex engagement portion corresponding region on the outer wall of the seal groove is outwardly positioned in the seal groove width direction. If it is made to bend forcibly, the operation time of the pressing force applied to the tongue-shaped extending portion may be short.
[0018]
According to a sixth aspect of the present invention, in the method of assembling the lamp body and the front lens according to the fifth aspect, a thin portion extending along at least the region corresponding to the concave-convex engagement portion is provided on the bottom wall of the seal groove. And / or a pair of thin portions extending in the depth direction of the seal groove with at least a region corresponding to the concave-convex engaging portion provided on the outer wall of the seal groove, and a region corresponding to the concave-convex engaging portion on the outer wall of the seal groove. Are configured to be easily bent in the seal groove width direction.
[0019]
(Function) By providing a thin portion extending along the seal groove on the bottom wall of the seal groove or / and providing a pair of thin portions extending in the depth direction of the seal groove on the outer wall of the seal groove, the outer wall of the seal groove is provided. Is easy to bend outward in the seal groove width direction, so when the tongue-shaped extending portion is pressed inward in the seal groove width direction, the amount of deflection of the region corresponding to the concave and convex engaging portion on the outer wall of the seal groove is large, The force required to elastically deform (bend) the outer wall of the seal groove outward when the seal leg is inserted may be small.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described based on examples.
[0021]
1 to 5 show a first embodiment of the present invention. FIG. 1 is a front view of a clearance lamp according to a first embodiment of the present invention, and FIG. 2 is a horizontal sectional view of the lamp (FIG. And FIG. 3 is a vertical sectional view (along the line III-III shown in FIG. 1) of the lamp in which the engaging portion between the seal leg and the seal groove is cut at the position of the concave / convex engaging portion. FIG. 4 is an exploded perspective view of the engagement portion between the seal leg and the seal groove, and FIG. 5 is an explanatory diagram of a process of inserting the seal leg into the seal groove and assembling the front lens to the lamp body.
[0022]
In these drawings, reference numeral 10 denotes a container-shaped synthetic resin lamp body having an open front surface, and a bulb 12 as a light source is inserted into a bulb insertion hole 11 provided on a rear wall of the lamp body 10. A clear synthetic resin front lens 20 is attached to the front opening of the lamp body 10.
[0023]
Reference numeral 14 denotes a seal groove having a U-shaped cross section formed around the periphery of the front opening of the lamp body 10. The seal groove 14 with which the seal leg 22 of the front lens 20 engages is a hot melt seal material. 13 is loaded and waterproofed. The seal leg 22 is substantially perpendicular to the surface of the front lens 20 and extends in a vertical wall shape in a direction parallel to the axis L of the bulb 12, while the inner wall 15 and the outer wall 16 forming the seal groove 14 are also formed with the seal leg 22. The light emitted from the bulb 12 extends in parallel so that the light emitted from the bulb 12 is not blocked by the seal grooves 14 and the seal legs 22 and is irradiated to a wide area in front of the front lens 20.
[0024]
As shown in FIG. 1, projections 24 are provided on the outer side of the distal end of the seal leg 22 at two locations, two at the top and two at the bottom, while the outer wall 16 of the seal groove 14 has a seal An engagement hole 18 which is a concave portion with which the projection 24 on the leg 22 can engage is provided. That is, the projections 24 provided at the distal end of the seal leg 22 and the engagement holes 18 provided in the outer wall 16 of the seal groove 14 constitute the concave-convex engagement portion 30. At the same time as the engagement, the projection 24 of the seal leg 22 engages with the engagement hole 18 of the seal groove 14, and the front lens 20 is mechanically fastened to the form positioned with respect to the lamp body 10.
[0025]
Further, a semicircular groove is formed in the bottom wall 17 in a region corresponding to the concave-convex engagement portion 30 in the bottom wall 17 of the seal groove 14, so that the seal groove is formed substantially at the center in the width direction of the seal groove 14. A thin portion 19a extending along the groove 14 is provided so that the concave / convex engaging portion corresponding region 14A on the outer wall 16 side of the seal groove 14 is more easily bent than other regions of the seal groove 14. That is, the thin portion 19a is provided in a region corresponding to the concave-convex engaging portion 30 on the back side of the seal groove bottom wall 17 (a position corresponding to the engaging hole 18 in the extending direction of the seal groove 14). The corresponding region 14A is easily bent. For this reason, when the seal leg 22 is inserted into the seal groove 14 and the projection 24 on the seal leg 22 is engaged with the engagement hole 18 on the seal groove 14 side (hereinafter referred to as uneven engagement), the engagement is smooth. In addition, there is no problem that the hot melt 13 is scraped out of the seal groove 14 or the hot melt 13 is biased in the seal groove width direction unlike the conventional structure.
[0026]
That is, when the seal leg 22 is inserted into the seal groove 14, the (projection 24) of the seal leg 22 and the outer wall 16 of the seal groove 14 interfere with each other and receive a reaction force with each other. The joint portion corresponding region 14A is easily elastically deformed (easy to bend) with respect to the lamp body 10 using the thin portion 19a of the seal groove bottom wall 17 as a hinge. Therefore, the seal leg 22 hardly bends and flexes the outer wall 16 of the seal groove 14 outward in the seal groove width direction as shown by the arrow B in FIG. As shown in FIG. 5B, the projection 24 is inserted straight into the seal groove 14, and the projection 24 on the seal leg 22 engages with the engagement hole 18 on the seal groove 14. The outer wall 16 of the sealing groove 14 is restored. When the outer wall 16 is restored, the hot melt 13 in the seal groove 14 is only slightly pressed by the outer wall 16, and the hot melt 13 is scraped out of the seal groove 14 in the seal groove width direction as in the conventional structure. A pressing force large enough to bias the hot melt 13 does not act.
[0027]
6A and 6B show a clearance lamp according to a second embodiment of the present invention. FIG. 6A is a longitudinal sectional view of the seal leg and the seal groove engagement portion obtained by cutting the lamp at the concave-convex engagement position. () Is a perspective view of a seal groove.
[0028]
In the above-described first embodiment, the thin portion 19a is formed by denting the outside of the bottom wall 17 of the seal groove 14. However, in the second embodiment, the thin wall 19 of the bottom wall 17 of the seal groove 14 is formed. The thin portion 19a is formed by denting the inside, so that the thin portion 19a is not exposed to the outside.
[0029]
Further, the outer wall 16 of the seal groove 14 is formed higher than the inner wall 15, and the engaging hole 18 forming the concave / convex engaging portion 30 is provided at a position higher than the inner wall 15 in the outer wall 16. When the leg 22 is inserted into the seal groove 14, the amount of deflection of the outer wall 16 (the area 14B corresponding to the concave / convex engaging portion on the outer wall 16 side of the seal groove 14) is large, and the concave / convex engagement (corresponding to the front lens 20 to the lamp body 10). Assembly) becomes smooth.
[0030]
7A and 7B show a clearance lamp according to a third embodiment of the present invention. FIG. 7A is a vertical cross-sectional view of the seal leg and the seal groove engagement portion obtained by cutting the lamp at the concave-convex engagement position. () Is a perspective view of a seal groove.
[0031]
In the first and second embodiments, the semi-circular cross section is formed on the upper surface or the lower surface of the bottom wall 17 so as to extend along the seal groove 14 substantially at the center in the width direction of the seal groove 14. Although the thin portion 19a is provided, in the third embodiment, a V-shaped groove is formed in the lower surface of the bottom wall 17 so that the seal groove 14 is formed substantially at the center in the width direction of the seal groove 14. Is formed so as to increase the amount of bending of the concave / convex engaging portion corresponding region 14B ′ on the outer wall 16 side of the seal groove 14.
[0032]
The other parts are the same as those of the second embodiment, and the same reference numerals are given, and the detailed description is omitted.
[0033]
8A and 8B show a clearance lamp according to a fourth embodiment of the present invention. FIG. 8A is a longitudinal sectional view of the seal leg and the seal groove engagement portion obtained by cutting the lamp at the concave and convex engagement portion position, and FIG. () Is a perspective view of a seal groove.
[0034]
In the fourth embodiment, a tongue-shaped rearward extension having a width somewhat larger than the width of the engagement hole 18 is provided in a region corresponding to the concave-convex engagement portion 30 of the outer wall 16 (behind the position where the engagement hole 18 is formed). The projecting portion 40 is provided, the cross section of the concave / convex engaging portion corresponding region 14C on the outer wall 16 side of the seal groove is formed in a T shape, and the base 41 of the rear extending portion 40 is formed thick. In addition, the rigidity of the concave / convex engaging portion corresponding region 14C of the seal groove is increased. Therefore, when the seal leg 22 is inserted into the seal groove 14, the pressing force acting on the outer wall 16 of the seal groove 14 is concentrated on the thin portion 19a, and the concave-convex engagement portion corresponding region 14C is effectively bent. Can be.
[0035]
The other parts are the same as those of the first embodiment, and the same reference numerals are given, and the detailed description is omitted.
[0036]
9A and 9B show a clearance lamp according to a fifth embodiment of the present invention. FIG. 9A is an exploded perspective view of a seal groove and a seal leg of the lamp, and FIG. It is a perspective view which shows a mode that it combines.
[0037]
In the above-described first to fourth embodiments, the thin portion 19 is provided on the bottom wall 17 of the seal groove 14, but in the fourth embodiment, the thin portion 19b is provided on the outer wall 16 of the seal groove 14. Have been. That is, a thin portion 19 b extending in the depth direction of the seal groove is formed in the region corresponding to the concave-convex engagement portion 30 of the outer wall 16 (the region including the engagement hole 18 of the outer wall 16). A pair of concave-convex engagement portion corresponding regions 14D on the outer wall 16 side of the seal groove 14 is easily elastically deformed (easy to bend) by using the pair of thin portions 19b, 19b as hinges.
[0038]
Therefore, when the seal leg 22 is inserted into the seal groove 14, as shown in FIG. 9B, the seal leg 22 moves the outer wall 16 of the seal groove 14 outward in the seal groove width direction with almost no bending. It is inserted into the seal groove 14 while being bent, and the outer wall 16 of the bent seal groove 14 is restored to engage with the concave and convex.
[0039]
The thin portion 19b provided on the outer wall 16 corresponding to the concave-convex engagement portion 30 may be provided inside the outer wall 16, and the appearance is good because the thin portion 19b is not exposed to the outside.
[0040]
In the above-described first to fifth embodiments, the thin wall portions 19a and 19b are provided on the bottom wall 17 or the outer wall 16 of the seal groove 14, and the region corresponding to the concave / convex engagement portion of the seal groove is easily bent. However, if the thin portions 19a and 19b are provided on the bottom wall 17 or the outer wall 16 of the seal groove 14, respectively, the region corresponding to the concave / convex engagement portion on the outer wall 16 side of the seal groove has a structure that is more easily bent. The front lens can be more smoothly assembled to the lamp body.
[0041]
FIGS. 10 and 11 show a clearance lamp according to a sixth embodiment of the present invention. FIG. 10 is an exploded perspective view of a concave / convex engaging portion between a seal leg and a seal groove in the lamp. FIG. It is explanatory drawing of the process of assembling a front lens to a lamp body by inserting in a groove.
[0042]
In the above-described first to fifth embodiments, the thin portions 19a and 19b are provided in the bottom wall 15 of the seal groove 14 and / or in the region corresponding to the concave-convex engagement portion 30 of the outer wall 16 so that the outer wall side of the seal groove is provided. By making the region corresponding to the concave / convex engaging portion easy to bend, when the seal leg 22 is inserted into the seal groove 14, the outer wall 16 of the seal groove 14 pressed by the seal leg 22 is flexibly bent, and the front surface due to the concave / convex engagement is formed. Although the mechanical connection between the lens 20 and the lamp body 10 can be performed smoothly, in the sixth embodiment, the thin portions 19a and 19b are not provided as in the previous embodiment, and the seal groove 14 is not provided. By providing a tongue-shaped extending portion 42 extending rearward of the seal groove 14 in a region corresponding to the concave-convex engagement portion 30 on the outer wall 16 (behind the region including the engaging hole 18 of the outer wall 16), Outer wall 16 of groove 14 The uneven engagement portion corresponding region 14E has a T-shaped cross section and its rigidity is enhanced, and when the seal leg 22 is inserted into the seal groove 14, the pushing portion P such as an air cylinder is used. The tongue-shaped extending portion 42 is pressed inward in the seal groove width direction, and the concave / convex engaging portion corresponding region 14E on the outer wall 16 side of the seal groove 14 swings with respect to the lamp body 10 to move outward in the seal groove width direction. It bends.
[0043]
That is, first, as shown in FIG. 11A, the front lens 20 is arranged so that the seal leg 22 faces the seal groove 14 in which the hot melt 13 is loaded. Next, prior to the lowering of the front lens 20 (the seal leg 22) or simultaneously with the lowering of the front lens 20 (the seal leg 22), the tongue-shaped extending portion 42 is pushed by the pushing means P such as an air cylinder. Press inward in the seal groove width direction. When the tongue-like extending portion 42 is pushed, the concave-convex engaging portion corresponding region 14E on the outer wall 16 side of the seal groove bends outward in the seal groove width direction as shown in FIG. 11B. . For this reason, the descending seal leg 22 is inserted into the seal groove 14 without interfering with the outer wall 16 of the seal groove. When the external force exerted on the tongue-shaped extension 42 by the pushing means P such as an air cylinder is released, the bent outer wall 16 of the seal groove is restored, and the outer wall 16 of the seal groove is engaged. The hole 18 engages with the projection 24 of the seal leg 22 (concave and concave engagement).
[0044]
In particular, if the tongue-like extending portion 42 is pushed by the pushing means P such as an air cylinder in connection with the insertion of the seal leg 22 into the seal groove 14, the tongue-like shape is provided. The operation time of the pressing force applied to the extension portion 42 is short, and the process time for assembling the front lens 20 to the lamp body 10 can be reduced.
[0045]
FIG. 12 is an exploded perspective view of a concave / convex engaging portion between a seal leg and a seal groove in a clearance lamp according to a seventh embodiment of the present invention.
[0046]
In this embodiment, regions corresponding to the concave-convex engagement portions 30 on the bottom wall 17 and the outer wall 16 of the seal groove 14 (regions corresponding to the positions where the engagement holes 18 are formed in the seal groove extension direction) are provided with thin portions 19a and 19b. The area 14F corresponding to the concave / convex engaging portion on the outer wall 16 side of the seal groove has a structure that is easy to bend, and a tongue-like piece extending rearward of the seal groove is provided in a region corresponding to the concave / convex engaging section 30 on the outer wall 16 of the seal groove 14. When the seal leg 22 is inserted into the seal groove 14 by using the pushing means P such as an air cylinder, the extension portion 42 is provided in the same manner as in the sixth embodiment. Is pressed inward in the seal groove width direction to forcibly bend the region 14 </ b> F corresponding to the concave-convex engagement portion on the outer wall 16 side of the seal groove 14 outward in the seal groove width direction.
[0047]
Since the concave / convex engaging portion corresponding region 14F on the outer wall 16 side of the seal groove 14 has a structure that is easily bent, the concave / convex engaging portion of the seal groove when the tongue-shaped extending portion 42 is pressed inward in the seal groove width direction. The amount of deflection of the corresponding region 14F is large, and the pressing force (the urging force of the pushing means P such as an air cylinder) required to elastically deform (bend) the outer wall 16 of the seal groove outward may be small.
[0048]
FIGS. 13A and 13B show a clearance lamp according to an eighth embodiment of the present invention, wherein FIG. 13A is a perspective view of a seal groove of the lamp, and FIGS. FIG. 4 is an explanatory view of a step of assembling the lamp body into the lamp body.
[0049]
In the eighth embodiment, a seal inserted into the seal groove 14 is formed in a region (upper region of the inner wall 15 facing the engagement hole 18 of the outer wall 16) corresponding to the concave-convex engagement portion 30 on the inner wall 15 of the seal groove 14. A structure is provided in which a convex portion 15a is provided which abuts on the leg 22 and prevents elastic deformation of the seal leg 22 toward the inner wall 14 side.
[0050]
That is, when the seal leg 22 is inserted into the seal groove 14, the (projecting portion 24) of the seal leg 22 and the outer wall 16 of the seal groove 14 interfere with each other and receive a reaction force with each other. As shown in FIG. 13B, the seal leg 22 is prevented from being elastically deformed toward the inner wall 14 by being backed up by the projection 15 a for contacting the seal leg provided on the seal leg 22. 13 (c) is inserted into the seal groove 14 while bending the concave / convex engaging portion corresponding region 14G on the outer wall 16 side of the seal groove 14 outwardly in the seal groove width direction, without substantially bending to the inner wall 15 side. Thus, the outer wall 16 of the bent seal groove is restored by the engagement of the projection 24 on the seal leg side with the engagement hole 18 on the seal groove side. When the outer wall 16 is restored, the seal material 13 in the seal groove 14 is only slightly pressed by the outer wall 16, and the seal material is scraped out from the seal groove or sealed in the seal groove width direction as in the conventional structure. A pressing force large enough to bias the material does not act.
[0051]
In addition, the seal material 13 interposed between the seal groove 14 and the seal leg 22 in the concave-convex engagement portion corresponding region 14G is reduced by the amount corresponding to the convex portion 15a for abutting the seal leg. On the tip end side of the leg 22, the seal material 13 is continuously interposed between the seal groove 14 and the seal groove 14 (the seal material 13 is interposed from the inside of the seal groove bottom wall 17 to the pool portion 14a below the convex portion 15a). Therefore, the sealing performance does not decrease.
[0052]
Further, the convex portion 15a is a cylindrical type having a lateral length equal to the lateral width of the engagement hole 18, and the sealing leg opening side 15a1 of the convex portion 15a is formed as a curved surface, so that the insertion of the seal leg 22 is smooth. The protrusion 15a is not limited to the horizontally long shape, and may be, for example, a hemispherical protrusion type (not shown).
[0053]
Further, in the above-described eighth embodiment, as shown in the first to fifth embodiments, a structure in which thin portions 19a and 19b are provided on the bottom wall 17 and the outer wall 16 of the seal groove 14 and / or the sixth embodiment. As shown in the example, the configuration in which the pushing means P for pressing the outer wall 16 of the seal groove 14 inward in the seal groove width direction may be appropriately combined.
[0054]
Also, in the various embodiments described above, the seal material loaded in the seal groove 14 has been described as a liquid (hot melt 13), but it is not a liquid such as hot melt but a solid such as a rubber string or a foam gasket. Is also effective. That is, in the related art, when the seal leg is inserted into the seal groove, the seal material at a position corresponding to the concave / convex engagement portion in the seal groove may be pushed in the width direction and the kinking seal performance may be reduced. When the seal leg is inserted into the seal groove, the seal material at the position corresponding to the concave / convex engagement portion in the seal groove is not pushed in the width direction, so that the seal material is not twisted and the sealing performance is not reduced.
[0055]
【The invention's effect】
As is clear from the above description, according to the vehicular lamp according to the first aspect, when the seal leg is inserted into the seal groove, the seal leg bends substantially while bending the outer wall of the seal groove outward. Since the seal material is inserted straight into the seal groove without sticking, the seal material does not protrude from the seal groove, and the seal material in the seal groove is not deviated in the groove width direction, so that the entire circumference of the engagement portion between the seal leg and the seal groove is Uniform sealing performance can be ensured.
[0056]
According to the vehicle lamp according to the second aspect, when inserting the seal leg into the seal groove, the seal leg is inserted straight into the seal groove with almost no bending while bending the outer wall of the seal groove outward. Therefore, since the seal material does not protrude from the seal groove and the seal material in the seal groove is not deviated in the groove width direction, uniform sealing performance can be secured in the entire circumference of the engaging portion between the seal leg and the seal groove.
[0057]
According to the vehicle lamp according to the third aspect, when inserting the seal leg into the seal groove, the seal leg is inserted straight into the seal groove with almost no bending while bending the outer wall of the seal groove outward. Therefore, since the seal material does not protrude from the seal groove and the seal material in the seal groove is not deviated in the groove width direction, uniform sealing performance can be secured in the entire circumference of the engaging portion between the seal leg and the seal groove.
[0058]
According to the vehicle lamp of the fourth aspect, when inserting the seal leg into the seal groove, the seal leg is inserted into the seal groove without interfering with the outer wall of the seal groove, and the convex portion of the seal leg and the concave portion of the seal groove are provided. Can be engaged, so that the front lens can be smoothly assembled to the lamp body. Further, the force for bending the outer wall of the seal groove is small, and the equipment for assembling the front lens to the lamp body is simplified.
[0059]
According to the method of assembling the lamp body and the front lens according to the fifth aspect, when inserting the sealing leg into the sealing groove, the sealing leg is inserted into the sealing groove without causing interference with the outer wall of the sealing groove, and the projection of the sealing leg is formed. Since the portion can be engaged with the concave portion of the seal groove, the front lens can be smoothly assembled to the lamp body.
[0060]
According to the sixth aspect, when the seal leg is inserted into the seal groove, only a slight pressing force is applied to the tongue-shaped extending portion, and the seal leg is not interfered with the outer wall of the seal groove. And the convex portion of the seal leg can be engaged with the concave portion of the seal groove, so that the front lens can be more smoothly assembled to the lamp body and the equipment can be simplified.
[Brief description of the drawings]
FIG. 1 is a front view of a clearance lamp according to a first embodiment of the present invention.
FIG. 2 is a horizontal sectional view of the lamp (a sectional view along line II-II shown in FIG. 1).
FIG. 3 is a vertical cross-sectional view (a cross-sectional view taken along line III-III shown in FIG. 1) of the lamp, in which a seal leg and a seal groove engaging portion are cut at a concave / convex engaging portion position.
FIG. 4 is an exploded perspective view of a seal leg and a seal groove engagement portion.
FIG. 5 is an explanatory diagram of a process of inserting a front leg into a lamp body by inserting a seal leg into a seal groove.
6A and 6B show a clearance lamp according to a second embodiment of the present invention, in which FIG. 6A is a longitudinal sectional view of the seal leg and the seal groove engaging portion, which is obtained by cutting the lamp at the concave-convex engaging portion position. () Is a perspective view of a seal groove.
FIG. 7 shows a clearance lamp according to a third embodiment of the present invention. () Is a perspective view of a seal groove.
8A and 8B show a clearance lamp according to a fourth embodiment of the present invention, in which FIG. 8A is a longitudinal sectional view of the seal leg and the seal groove engagement portion obtained by cutting the lamp at the concave-convex engagement position. () Is a perspective view of a seal groove.
9A and 9B show a clearance lamp according to a fifth embodiment of the present invention, wherein FIG. 9A is an exploded perspective view of a seal groove and a seal leg of the lamp, and FIG. It is a perspective view which shows a mode that it is made to engage.
FIG. 10 is an exploded perspective view of a concave / convex engaging portion between a seal leg and a seal groove in a clearance lamp according to a sixth embodiment of the present invention.
FIG. 11 is an explanatory diagram of a process of inserting a seal leg into a seal groove and assembling a front lens to a lamp body.
FIG. 12 is an exploded perspective view of a concave / convex engaging portion between a seal leg and a seal groove in a clearance lamp according to a seventh embodiment of the present invention.
FIGS. 13A and 13B show a clearance lamp according to an eighth embodiment of the present invention, wherein FIG. 13A is a perspective view of a seal groove of the lamp, and FIGS. It is explanatory drawing of the process of assembling a lens to a lamp body.
FIG. 14 is a vertical cross-sectional view of a conventional lamp at the position of a concave-convex engagement portion.
FIG. 15 is an explanatory view showing a process of assembling a seal leg and a seal groove in a conventional lamp.
[Explanation of symbols]
10 Lamp body
12. Light source bulb
13 Hot melt as sealing material
14 Seal groove
14A, 14B, 14B ', 14C, 14D, 14E, 14F, 14G A region corresponding to an uneven engagement portion on the outer wall side of the seal groove.
15 Inner wall of seal groove
15a Convex part for sealing leg contact
16 Outer wall of seal groove
17 Bottom wall of seal groove
18 Engagement holes (concave portions) that constitute an uneven engagement portion
19a Thin portion provided on bottom wall of seal groove
19b Thin part provided on outer wall of seal groove
20 Front lens
22 Seal leg
24 Projections (Convex Parts) Constituting Concavo-convex Engagement Parts
30 Uneven engagement part
40, 42 tongue-shaped rear extension
P Means for pushing the tongue-shaped extension part inward in the seal groove width direction

Claims

A convex portion is provided on the outside of the seal leg of the front lens, while a concave / convex engaging portion is formed on the outer wall of the seal groove of the lamp body with which the seal leg is engaged in cooperation with the convex portion of the seal leg. A vehicle in which a concave portion is provided, and a seal leg is inserted into a seal groove loaded with a seal material, and at the same time, a convex portion of the seal leg elastically engages with the concave portion of the seal groove to mechanically fasten the lamp body and the front lens. For lighting fixtures,
A vehicular lamp characterized in that a thin wall portion is provided on a bottom wall of the seal groove so as to extend along the seal groove at least over a region corresponding to the concave-convex engagement portion.

A convex portion is provided on the outside of the seal leg of the front lens, while a concave / convex engaging portion is formed on the outer wall of the seal groove of the lamp body with which the seal leg is engaged in cooperation with the convex portion of the seal leg. A vehicle in which a concave portion is provided, and a seal leg is inserted into a seal groove loaded with a seal material, and at the same time, a convex portion of the seal leg elastically engages with the concave portion of the seal groove to mechanically fasten the lamp body and the front lens. For lighting fixtures,
A vehicular lamp characterized in that a pair of thin portions extending in the depth direction of the seal groove are provided on the outer wall of the seal groove at least in a region corresponding to the concave-convex engagement portion.

A convex portion is provided on the outside of the seal leg of the front lens, while a concave / convex engaging portion is formed on the outer wall of the seal groove of the lamp body with which the seal leg is engaged in cooperation with the convex portion of the seal leg. A vehicle in which a concave portion is provided, and a seal leg is inserted into a seal groove loaded with a seal material, and at the same time, a convex portion of the seal leg elastically engages with the concave portion of the seal groove to mechanically fasten the lamp body and the front lens. For lighting fixtures,
At least a region of the inner wall of the seal groove corresponding to the concave-convex engagement portion and separated from the bottom wall of the seal groove is in contact with a seal leg inserted into the seal groove to inward of the seal leg. A vehicular lamp having a convex portion for preventing elastic deformation.

A tongue-like extending portion extending rearward of the seal groove is provided in a region corresponding to the concave-convex engagement portion on the outer wall of the seal groove, and when inserting a seal leg into the seal groove, the tongue-like shape is provided. The extension portion is pressed inward in the seal groove width direction to deflect an area corresponding to the concave-convex engagement portion on the outer wall of the seal groove outward in the seal groove width direction. Vehicle lighting.

A convex portion is provided on the outside of the seal leg of the front lens, while a concave / convex engaging portion is formed on the outer wall of the seal groove of the lamp body with which the seal leg is engaged in cooperation with the convex portion of the seal leg. A lamp in which a concave portion is provided, and a seal leg is inserted into a seal groove loaded with a seal material, and at the same time, a convex portion of the seal leg elastically engages with the concave portion of the seal groove to mechanically fasten the lamp body and the front lens. In the method of assembling the body and front lens,
A tongue-like extending portion extending rearward of the seal groove is provided in a region corresponding to the concave-convex engagement portion on the outer wall of the seal groove, and when inserting the seal leg into the seal groove, the tongue-like extension is provided. The lamp body and the front lens are assembled by pressing an extension of the lamp body in the width direction of the seal groove to bend the region corresponding to the concave / convex engagement portion on the outer wall of the seal groove in the width direction of the seal groove.

A thin wall portion is provided on the bottom wall of the seal groove so as to extend along the seal groove at least over a region corresponding to the concave / convex engaging portion, and / or an outer wall of the seal groove corresponds to at least the concave / convex engaging portion. A pair of thin portions extending in the depth direction of the seal groove are provided so as to sandwich the region to be formed, and the concave-convex engagement portion corresponding region on the outer wall of the seal groove is configured to be easily bent in the seal groove width direction. A method for assembling a lamp body and a front lens according to claim 5.