JP3593073B2

JP3593073B2 - Shield helmet

Info

Publication number: JP3593073B2
Application number: JP2001254674A
Authority: JP
Inventors: 昭博黒柳
Original assignee: 株式会社ワイズギア
Priority date: 2001-08-24
Filing date: 2001-08-24
Publication date: 2004-11-24
Anticipated expiration: 2021-08-24
Also published as: JP2003064524A

Description

【０００１】
【発明の属する技術分野】
本発明は、自動二輪車などに乗車する場合に使用されるシールド板開閉式ヘルメットに関する。
【０００２】
【従来の技術】
従来のヘルメットにおけるシールド板の開閉方式として、ヘルメット本体の外側シェルに取り付けた取り付け基材に形成した筒体部が、シールド板の側部に形成した円弧状ガイド溝に形成した全閉位置用保持孔部、全開位置用保持孔部、デフロスト位置用保持孔部に嵌り合う構成によって、ヘルメット本体に対してシールド板を全閉位置、デフロスト位置、全開位置と順次開閉できるものが、特開平１０−１６８６３８号に開示されている。この方式では、凹部と凸部が嵌る構成であるため、シェード板の開度を所定の状態に保持する構成としては簡単であるが、シェード板を僅かに開いて風は実質的に侵入しないが曇りは防止できる程度の開度に保持することには適さない。すなわち、この従来発明では、デフロスト位置は全閉位置に対して、図では約１０°が示され、実用性の見地からは６°〜１５°のうちの何れかが好ましく、８〜１３°のうちの何れかであるのが更に好ましいと記載されているように、デフロスト位置でのシェード板の開度は比較的大きい。
【０００３】
上記従来技術では、シェード板を透しての視界を広くする等のために、シェード板の回動中心軸からシェード板の前面下端までの長さは、一般的に１７０ｍｍ〜１８０ｍｍである。この場合、上記寸法が１７０ｍｍのシェード板において、６°〜１５°の開度の場合には、シェード板の前面下端とヘルメット本体との隙間は、１８ｍｍ〜４４ｍｍ程度となる。また、上記寸法が１８０ｍｍのシェード板において、６°〜１５°の開度の場合には、シェード板の前面下端とヘルメット本体との隙間は、１９ｍｍ〜４７ｍｍ程度となる。
【０００４】
【発明が解決しようとする課題】
このような開度になると、自動二輪車等に乗車している場合には、スピードが増すにしたがってその部分からの風の侵入が多くなって、このヘルメットを被っている人はその顔面に多くの風を感じ、冬季などでは冷たく感じあまり好ましくない。また、このような隙間形成によってこの部分や左右の隙間部分から雨が侵入する虞も十分考えられる。このように比較的大きな隙間ができるのは、上記従来技術では、取り付け基材に形成した筒体部が、シールド板の側部に形成した円弧状ガイド溝の全閉位置用保持孔部、全開位置用保持孔部、デフロスト位置用保持孔部に嵌り合う構成によって形成されているため、これら保持孔相互間隔をある程度から狭められないために生じる。
【０００５】
また、この従来技術のものは、シールド板の回動軸は、取り付け基材とネジ結合されるワッシャを支軸とする構成である。このように、シールド板の側部に形成した円弧状ガイド溝と取り付け基材に形成された筒体部との嵌合関係部分と、シールド板の回動軸の形成部分が別の部材の組み合わせになっているが、密接な両者の関係からすれば、前記嵌合関係部分とシールド板の回動軸とが単一部材で構成されていることが組立て誤差が生じないので望ましい。
【０００６】
本発明は、上記のような点に鑑みて、簡単な構成によってヘルメット本体に対してシールド板の開閉位置を複数角度に保持できるシールド板開閉式ヘルメットを提供するものである。そして、シールド板を安定的に保持できると共に支持部材に対して工具なしに容易に着脱できる技術手段を提供する。
【０００７】
【課題を解決するための手段】
本発明のシールド板開閉式ヘルメットは、透明性の合成樹脂製シールド板の左右両端部をヘルメット本体の左右両側外部に回動可能に支持してなるヘルメットにおいて、前記シールド板の左右両端部には、上方に開いた案内溝の下部に形成された円弧状の軸孔と、前記軸孔を取り囲む後部辺に形成されて前記ヘルメット本体に対する前記シールド板の開閉位置を定める複数の切り欠き部とを設け、前記ヘルメット本体の左右両側外部には、前記シールド板の軸孔に嵌合する円形状の軸部と、前記シールド板の複数の切り欠き部に弾性力によって嵌り合う係合部とを備えた左右一対の合成樹脂製支持部材を設け、前記支持部材には、前記シールド板の軸孔を取り囲む後部辺側の案内溝の側壁に対応して前記軸部の円形状部の一部が直線状に切り取られた形状のガイド部と、前記係合部の前方で前記ガイド部の上方にあって前記シールド板の軸孔を取り囲む後部辺の先端部内面に当接する凸部とを設け、前記案内溝に沿って前記ガイド部とこれに対応する前記軸部の円形状周面部が嵌り合う組み合わせによって、前記ガイド部と前記係合部との間隔に前記シールド板の軸孔を取り囲む後部辺の上端部が挿通され、この嵌り合いの最終位置において前記シールド板の軸孔を取り囲む後部辺の先端部が前記凸部に乗り上がった状態で前記シールド板の軸孔と前記支持部材の軸部とが嵌合し前記係合部が前記切り欠き部の一つに係合した状態となることを特徴とする。
【０００８】
このように、シールド板には、案内溝と、円弧状の軸孔と、シールド板の開閉位置を定める複数の切り欠き部とを設け、シールド板をヘルメット本体に支持する支持部材は、円形状の軸部と、係合部と、ガイド部と、凸部とを形成した単一の合成樹脂製とすることによって、部品点数が少なく組立てが簡単となる。また、シールド板のヘルメット本体への取り付けは、前記案内溝に沿って前記ガイド部とこれに対応する前記軸部の円形状部が嵌り合う組み合わせによって達成され、この嵌り合いの最終位置において、前記シールド板の軸孔を取り囲む後部辺の先端部の弾力性によって、前記シールド板の軸孔を取り囲む後部辺の先端部が前記凸部に乗り上がった状態で前記シールド板の軸孔の全体と前記支持部材の軸部との嵌合状態となるため、シールド板を回動可能に安定的に支持する状態となる。更に、シールド板を安定的に保持できると共に、前記支持部材に対して工具なしに容易に着脱できる。
【０００９】
なお、シールド板の曇り防止効果が奏される範囲においてヘルメット本体との隙間をできるだけ少なくして、シールド板を全閉、全開、若干開いた空気導入位置と、更に僅かに開いた曇り防止位置とをとることができるようにするために、透明性の合成樹脂製シールド板の左右両端部をヘルメット本体の左右両側外部に回動可能に支持してなるヘルメットにおいて、前記シールド板の左右両端部には、上方に開いた案内溝の下部に形成された円弧状の軸孔と、前記軸孔を取り囲む後部辺に形成されて前記ヘルメット本体に対する前記シールド板の開閉位置を定める複数の切り欠き部とを設け、前記ヘルメット本体の左右両側外部には、前記シールド板の軸孔に嵌合する円形状の軸部と、前記シールド板の複数の切り欠き部に弾性力によって嵌り合う係合部とを備えた左右一対の合成樹脂製支持部材を設け、前記切り欠き部は少なくとも前記シールド板の全閉位置用切り欠き部と風導入用に少し開いた位置用切り欠き部と全開位置用切り欠き部とを定め、前記係合部には前記全閉位置用切り欠き部と前記少し開いた位置用切り欠き部間の凸部が嵌る凹部を設け、前記凸部と前記凹部との嵌り合いによって前記シールド板が前記少し開いた位置よりも更に少なく開いた曇り防止位置をとるように構成することができる。
【００１０】
これによって、簡単な構成によってヘルメット本体に対してシールド板の開閉位置を複数角度に保持できるシールド板開閉式ヘルメットを提供でき、シールド板を全閉、全開、小さく開いた空気導入位置と、更に僅かに開いた曇り防止位置とをとることができる。小さく開いた風導入位置では、シールト板の内側に侵入した空気によってシールド板の曇り防止効果が得られるが、温暖な季節条件ではヘルメット着用者は顔面に少し風を受けても気持ちよく感じるのに対して、気温が低い季節では寒さによって不快感を覚える。しかし、本発明では、小さく開いた風導入位置よりも更に狭い僅かな開度で以って開くことによって、小さく開いた風導入位置の場合よりもはるかに少ない空気の流通とし、これによって、ヘルメット着用者に対し、侵入する空気による不快感を少なくし、且つ、シールド板の曇り防止効果が得られる程度の開度である。
【００１１】
【発明の実施の形態】
次に、本願発明の実施の形態について説明する。図１乃至図１２は本発明の実施形態を示す。図１は本発明シールド板開閉式ヘルメットのシールド板開閉状態説明用斜視図、図２は支持部材に対してシールド板の左右両端部を対応させた状態の説明図、図３は支持部材とシールド板の第１の組み合わせ途中の状態の説明図、図４は支持部材とシールド板の第２の組み合わせ途中の状態の説明図、図５は支持部材とシールド板の組み合わせ最終状態の説明図、図６は係合部の凹部と切り欠き部間の凸部との係合状態説明図、図７は支持部材とシールド板の組み合わせ部を外側から見た分解斜視図、図８は支持部材とシールド板の組み合わせ部を内側から見た分解斜視図、図９はヘルメット本体に対するシールド板の全閉状態の右側面説明図、図１０はヘルメット本体に対するシールド板の全開状態の右側面説明図、図１１はヘルメット本体に対するシールド板の少し開いた状態の右側面説明図、図１２はヘルメ１ット本体に対するシールド板の僅かに開いた状態の右側面説明図である。
【００１２】
以下、図に基づいて本発明の実施形態を説明する。本発明のシールド板開閉式ヘルメット１は、透明性の合成樹脂製シールド板３の左右両端部をヘルメット本体２の左右両側外部に回動可能に支持してシールド板３によってヘルメット本体２の前面開口２０を開閉するヘルメット１において、前記シールド板３の左右両端部には、上方に開いた案内溝４の下部に形成された円弧状の軸孔５と、前記軸孔５を取り囲む後部辺６に円弧状配置で形成されて前記ヘルメット本体２に対する前記シールド板３の開閉位置を定める複数の切り欠き部７Ａ、７Ｂ、７Ｃとを設け、前記ヘルメット本体２の左右両側外部には、前記シールド板３の軸孔５に嵌合する円形状の軸部８と、前記シールド板３の複数の切り欠き部７Ａ、７Ｂ、７Ｃに弾性力によって嵌り合う係合部９とを備えた左右一対の合成樹脂製支持部材１２を設ける。支持部材１２はヘルメット本体２の左右側面に後述のように取り付け孔１６、１７を介して取り付けネジ１６Ａ、１７Ａによって固定され、シールド板３の左右両端部は、支持部材１２の外側面に対応する。係合部９は、支持部材１２の一部に弾力性が得られるように伸びている腕２１の先に短い円筒状に形成されている。
【００１３】
前記支持部材１２には、前記シールド板３の軸孔５を取り囲む後部辺６側の案内溝４の側壁４Ａに対応して前記軸部８の円形状部の一部が直線状に切り取られた形状のガイド部１０と、前記係合部９の前方で前記ガイド部１０の上方にあって前記シールド板３の軸孔５を取り囲む後部辺６の先端部内面に当接する凸部１１とを設け、前記案内溝４に沿って前記ガイド部１０とこれに対応する前記軸部８の円形状部が嵌り合う組み合わせによって、前記ガイド部１０と前記係合部９との間隔に前記シールド板３の軸孔５を取り囲む後部辺６の上端部が挿通され、この嵌り合いの最終位置において前記シールド板３の軸孔５を取り囲む後部辺６の先端部が前記凸部１１に乗り上がった状態で前記シールド板３の軸孔５の全体と前記支持部材の軸部８との嵌合状態となり、前記係合部９が前記切り欠き部の一つに係合する。
【００１４】
このように、シールド板３には、案内溝４と、円弧状の軸孔５と、シールド板３の開閉位置を定める複数の切り欠き部とを設け、シールド板３をヘルメット本体に支持する支持部材は、円形状の軸部８と、係合部９と、ガイド部１０と、凸部１１とを形成した単一の合成樹脂製とすることによって、部品点数が少なく組立てが簡単となる。また、シールド板３のヘルメット本体への取り付けは、前記案内溝４に沿って前記ガイド部１０とこれに対応する前記軸部８の円形状部が嵌り合う組み合わせによって達成され、この嵌り合いの最終位置において、前記シールド板３の軸孔５を取り囲む後部辺６の先端部の弾力性によって、前記シールド板３の軸孔５を取り囲む後部辺６の先端部が前記凸部１１に乗り上がった状態で前記シールド板３の軸孔５の全体と前記支持部材の軸部８との嵌合状態となるため、シールド板３を回動可能に安定的に支持する状態となる。
【００１５】
これを更に詳細に説明すると、本発明のシールド板開閉式ヘルメット１では、前記ガイド部１０は、前記軸部８の円形状部のうち、前記シールド板３の軸孔５を取り囲む後部辺６側の案内溝４の側壁４Ａに対応する側の外側８Ａを残してその内側が直線状に切り取られた形状をなし、軸部８のこの残された部分８Ａの内側面１３がガイド部１０の外方に位置する。前記案内溝４に沿って前記ガイド部１０とこれに対応する前記軸部８の円形状周面の前部が嵌り合うとき、前記シールド板３の軸孔５を取り囲む後部辺６の先端部が前記凸部１１に乗り上がった状態で前記シールド板３の軸孔５を取り囲む後部辺６が弾性変形して前記軸部８の円形状部の残された部分８Ａの内側面１３と前記シールド板３の軸孔５を取り囲む後部辺６とが接触し、前記嵌り合いの最終位置において、前記シールド板３の軸孔５を取り囲む後部辺６の弾性復帰にて前記シールド板３の軸孔５の全体と前記支持部材の軸部８との嵌合状態となり、また係合部９が切り欠き７Ａに弾力性によって係合する。これによって、前記シールド板３の軸孔５の全体と前記支持部材の軸部８との嵌合状態ができ、前記シールド板３の回動が安定する。このような嵌り合いを達成するために、図２に示すように、案内溝４の中央線と軸孔５の中心とは、若干ずれた状態（図２のＧで示す）である。
【００１６】
また、本願発明のシールド板開閉式ヘルメットは、透明性の合成樹脂製シールド板３の左右両端部をヘルメット本体２の左右両側外部に回動可能に支持してなるヘルメット１において、前記シールド板３の左右両端部には、上方に開いた案内溝４の下部に形成された円弧状の軸孔５と、前記軸孔５を取り囲む後部辺６に形成されて前記ヘルメット本体２に対する前記シールド板３の開閉位置を定める複数の切り欠き部７Ａ、７Ｂ、７Ｃとを設け、前記ヘルメット本体２の左右両側外部には、前記シールド板３の軸孔５に嵌合する円形状の軸部８と、前記シールド板３の複数の切り欠き部７Ａ、７Ｂ、７Ｃに弾性力によって嵌り合う係合部９とを備えた左右一対の合成樹脂製支持部材を設け、前記切り欠き部７Ａ、７Ｂ、７Ｃは、少なくとも前記シールド板３の全閉位置用切り欠き部７Ｂと若干開いた位置用切り欠き部７Ｃと全開位置用切り欠き部７Ａとを定め、前記係合部９には前記全閉位置用切り欠き部７Ｂと若干開いた位置用切り欠き部７Ｃ間の凸部１４が嵌る凹部１５を設け、前記凸部１４と前記凹部１５との嵌り合いによって、前記シールド板３が前記若干開いた位置よりも更に少なく僅かに開いた曇り防止位置をとる。
【００１７】
シールド板の曇り防止のためには、シールド板３を曇り防止効果が得られる範囲でできるだけ小さく開くのが好ましい。原理的には、シールド板に曇り防止用の小孔を複数あけて、シールド板の全閉位置においてこの小孔を通してシールド板の内外間で僅かな空気の流通状態とすることによって目的を達成できるが、この小孔が視界の邪魔になったり、多くの雨をシールド板の正面に受けるとこの小孔からシールド板の内側に雨が侵入してシールド板の透視効果が損なわれたり、この小孔に埃が入ってその部分が汚れる等の問題があり、良好な曇り防止効果を得るには、この小孔の位置や大きさの設定が難しい。このため、本発明では、小孔を複数明ける方式ではなく、係合部９が複数の切り欠き部７Ａ、７Ｂ、７Ｃに弾性力によって嵌り合う機構において、より小さな開度が得られる方式を提供するものである。
【００１８】
通常のフルフェースヘルメットにおいては、シールド板の曇り防止のみならず使用者の涼しさ、息苦しさ、開放感等の心理的要因からもシールド板を少し開く状態は必要である。しかし、前記従来技術の方式では、前述のように、デフロスト位置でも比較的大きく開くようになる。本発明における前記小さく開いた風導入位置、及び前記僅かに開いた曇り防止位置は、通常、走行速度が約６０ｋｍ／時間よりも低速走行時に使用されるものであり、これ以上の走行速度では、風の巻き込み、風切り騒音、風圧、目の乾燥等によって使用に耐えられなくなることも考えられる。約６０ｋｍ／時間以下の走行速度において、走行パターンがどのようになるかによってこのような小開度の好ましい値も変わってくる。ゴー、ストップの多い市街地では低速走行となり、気温が高い場合等では、比較的大きな開度が求められるし、信号の少ない場所を一定速度で走行する場合には、比較的小さな開度が求められる。
【００１９】
このような条件を考慮して、本発明では、実用的見地から、ヘルメット本体２に対するシールド板３の小さく開く開度を、前記従来技術のものよりも更に小さい開度が簡単な構成によって容易に達成できる構成としている。実施形態では、２段階、即ち、前記小さく開いた風導入位置と前記僅かに開いた曇り防止位置とが選択できるようにしており、前記全開位置の開度を４５°〜５５°とし、前記小さく開いた風導入位置を６°〜１２°とし、前記僅かに開いた曇り防止位置を２°〜６°とした。必ずしもこの値に限定されるわけではなく、この値が前後してもよいが、この範囲において、実用的なヘルメットが提供でき、特に、前記僅かに開いた曇り防止位置を２°程度に小さくすることが簡単な構成によって達成できるものである。
【００２０】
本発明の構成において、シールド板３の着脱方法について詳しく説明する。図２は支持部材１２に対してシールド板３の左右両端部を対応させた状態である。前記案内溝４の幅Ｈに対して，前記ガイド部１０とこれに対応する前記軸部８の円形状部との間隔Ｐが同一又は僅かに小さい。又、ガイド部１０の延長線上での係合部９とガイド部１０との間隔Ｌに対して、前記シールド板３の軸孔５を取り囲む後部辺６の上端部６Ａの幅Ｒが僅かに小さい。支持部材１２には、シールド板３の軸孔５を取り囲む後部辺６が対面する外面に平らな窪み部２５が支持部材１２を肉薄にして形成している。この関係でもって窪み部２５に後部辺６が対面し、図３のように相対的に案内溝４の一側に沿ってガイド部１０がスライドし、このスライドによって両者の嵌り合いが更に進行して図４のように、前記シールド板３の軸孔５を取り囲む後部辺６の上端部６Ａが係合部９の付近を通り、上端部６Ａの先端の内側面に形成した傾斜面２７が前記凸部１１に接触し、上端部６Ａが前記凸部１１に乗り上がった状態となる。この状態で、前記シールド板３の軸孔５を取り囲む後部辺６の上端部６Ａは、この凸部１１によって外側へ押され、軸孔５を取り囲む後部辺６の弾力性によってこの凸部１１を押圧した状態である。図３及び図４の状態では、前記シールド板３の軸孔５を取り囲む後部辺６側の案内溝４の側壁４Ａ下部の軸孔５部分は、軸部８のガイド部１０の切り取りで残された部分８Ａの内側面１３に対応した位置にあり、図４の状態においては、上記のように上端部６Ａが凸部１１によって外側へ押されたことによって案内溝４の側壁４Ａ下部の軸孔５部分はこの内側面１３を押圧した状態となる。これによって、軸孔５を取り囲む後部辺６は凸部１１によって外側へ反り、弾力性による反発力が蓄えられた状態である。
【００２１】
図４の状態から更に両者の嵌り合いが進行し、案内溝４の側壁４Ａ下部の軸孔５部分が軸部８のガイド部１０の切り取りで残された部分８Ａの内側面１３を外れたとき、上記蓄えられていた反発力の支えが解除されるため、その復元力によって、図５のように、案内溝４の側壁４Ａの下部が軸部８のガイド部１０の切り取りで残された部分８Ａの周面方向へ移動し、軸部８のうちガイド部１０の切り取りで残された部分８Ａの周面と軸部８のその他の周面に軸孔５の周面全体がガタツキがない状態に嵌り合う。これと共に係合部９が形成されている支持部材から伸びている腕の弾力性によって第１の切り欠き部７Ａに嵌り合う。このような嵌り合いは、この状態が最終の嵌り合い状態である。
【００２２】
シールド板３が破損した場合等において支持部材１２から取り外す場合には、上記の組み合わせとは逆に、案内溝４の側壁４Ａ下部の軸孔５周面部分が、ガイド部１０の切り取りで残された部分８Ａの周面の内側に外れるように、支持部材１２とシールド板３間の組み合わせ解除の操作をし、この外れた状態で支持部材１２とシールド板３とを上記組み合わせとは逆に相互に外れる方向にスライドさせることによって、シールド板３は支持部材１２から外れる。この場合、案内溝４の側壁４Ａ下部と軸孔５周面部分との交差部の外側面には、傾斜面２８が形成されており、案内溝４の側壁４Ａ下部の軸孔５周面部分が、ガイド部１０の切り取りで残された部分８Ａの周面の内側に外れる際の引っ掛かり抵抗を少なくして、外し易くしている。
【００２３】
上記の最終嵌り合い状態において、シールド板３は軸部８の周りに回動可能である。この回動範囲は、ヘルメット本体２に対して全閉状態Ｓ１から全開状態Ｓ４までであり、係合部９が第１の切り欠き部７Ａに嵌り合った状態がヘルメット本体２の窓に対してシールド板３の全開状態Ｓ４である。そして、係合部９が第２の切り欠き部７Ｂに嵌り合った状態がヘルメット本体２の窓に対してシールド板３の全閉状態Ｓ１である。例えば、全開状態Ｓ４から係合部９の弾力性に抗してシールド板３を軸部８の周りに回動させると、係合部９は軸孔５を取り囲む後部辺６の円弧状部２６に乗り上がり、円弧状部２６を摺動して次の切り欠き部７Ｃへその弾力性によって嵌る。ヘルメットを着用している人がシールド板３を少し開いて周囲から空気を取り入れたいと思う場合には、全閉状態Ｓ１の切り欠き部７Ｂの隣に形成した第３の切り欠き部７Ｃに係合部９が嵌り合うことによってそれが達成される。
【００２４】
この第３の切り欠き部７Ｃに係合部９が嵌り合った状態は、小さく開いた風導入位置Ｓ３であり、上記のように、シールド板３の開度は６°〜１２°である。シールド板３の回動中心からシールド板３の前面下端までの長さが１７２ｍｍのシールド板３では、６°の開度の場合には、シールド板３の前面下端とヘルメット本体２との隙間は、約１８ｍｍであり、１２°の開度の場合には、シールド板３の前面下端とヘルメット本体２との隙間は、約３６ｍｍである。
【００２５】
本発明では、シールド板３の曇りを防止できる範囲でこの小さく開いた風導入位置Ｓ３よりも更に狭く開く手段に特徴がある。即ち、第２の切り欠き部７Ｂの端に形成された凸部１４が嵌る凹部１５を係合部９に形成している。実施形態では、第２の切り欠き部７Ｂと第３の切り欠き部７Ｃとの間に凸部１４が形成され、これに嵌る凹部１５を係合部９に形成している。この構成によって、シールド板３を軸部の周りに回動させると、係合部９はその弾力性によって嵌っていた切り欠き部から外れ、第３の切り欠き部７Ｃに係合部９が嵌り合った開度よりも更に狭い開度で以ってシールド板３を開くことができるため、シールド板３を僅かに開いた曇り防止用空気流通開度状態Ｓ２が形成できる。この僅かに開いた空気流通位置Ｓ２では、上記のように、２°〜６°の開度とした。これは、第３の切り欠き部７Ｃによる開度の略半分又はそれ以下の開度が得られる。このように、小さく開いた風導入位置Ｓ３よりも更に狭い僅かな開度で以って開くことによって、小さく開いた風導入位置Ｓ３の場合よりも遥かに少ない空気の流通とし、これは、ヘルメット着用者が侵入する空気による不快感を覚えない程度であり、しかもシールド板の曇り防止効果が得られる程度の開度である。
【００２６】
係合部９を小さくしてこれが嵌る切り欠きを小さくすれば、細かな開度を形成できるが、これらが小さきなるほど強度維持が困難となり、問題である。しかし本発明では、係合部９とこれが嵌る切り欠きは強度維持上で十分大きくしても、細かな開度が形成できるため、このような問題も解決できる点で効果がある。このため、従来技術の特開平１０−１６８６３８号よりも更に小さい開度が得られるため、本発明では、この従来技術では達成できなかった技術手段で以ってこの従来技術では奏し得なかった効果を奏することができるものである。
【００２７】
本発明では、支持部材１２とシールド板３の係合関係を安定的にできるようにするために、軸部８の外側端には、フランジ１８が形成され、これによって、シールド板３の軸孔５周辺部が軸部８から外れないように作用する。また、係合部９と軸孔５を取り囲む後部辺６とが外れないように両社の係合保持のために、係合部９の外側端部にはフランジ１９が形成されている。
【００２８】
支持部材１２は、軸孔５を取り囲む後部辺６が支持部材１２の外面に位置する状態において、ヘルメット本体２に対して取り付け孔１６、１７を介して取り付けネジ１６Ａ、１７Ａによって固定する。シールド板３と支持部材１２との組み合わせは、このネジ１６Ａ、１７Ａで固定する前に行われ、これらの組み合わせた状態でこのネジ１６Ａ、１７Ａによって固定する。またシールド板３を支持部材１２から取り外す場合には、このネジ１６Ａ、１７Ａを外した状態で、上記の操作によって取り外すこともできるが、通常は、このネジ１６Ａ、１７Ａを外さない状態で行うことができる。即ち、このネジ１６Ａ、１７Ａを外さずに、シールド板３を全開状態にし、上記のような支持部材１２に対するシールド板３の取り付けスライド方向とは逆方向にシールド板を強く引っ張ることによって、シールド板３は支持部材１２から外れる。そして、再度シールド板３を取付ける場合には、ヘルメット本体２に支持部材１２が固定された状態で、図２乃至図５に基づき説明したように、支持部材１２に対してシールド板３をスライドさせつつ前記最終嵌り合い状態にまで組み合わせることによって達成できる。このように、支持部材１２をヘルメット本体２に一旦位置決め固定した後は、取り付けネジ１６Ａ、１７Ａを外さずに、シールド板３の取り付け及び取り外しが可能となる。
【００２９】
本発明は、上記実施形態に限定されず、本発明の技術的範囲を逸脱しないかぎり種種の変更が考えられ、それに係る種種の実施形態を包含するものである。
【００３０】
【発明の効果】
第１請求項の発明では、シールド板には、案内溝と、円弧状の軸孔と、シールド板の開閉位置を定める複数の切り欠き部とを設け、シールド板をヘルメット本体に支持する支持部材は、円形状の軸部と、係合部と、ガイド部と、凸部とを形成した単一の合成樹脂製とすることによって、部品点数が少なく組立て上では誤差が生じなく簡単となる。また、シールド板のヘルメット本体への取り付けは、前記案内溝に沿って前記ガイド部とこれに対応する前記軸部の円形状部が嵌り合う組み合わせによって達成され、この嵌り合いの最終位置において、前記シールド板の軸孔を取り囲む後部辺の先端部の弾力性によって、前記シールド板の軸孔を取り囲む後部辺の先端部が前記凸部に乗り上がった状態で前記シールド板の軸孔と前記支持部材の軸部との嵌合状態となるため、シールド板を回動可能に安定的に支持する状態となる。更に、シールド板を安定的に保持できると共に前記支持部材との関係では工具なしに容易に着脱できる。
【図面の簡単な説明】
【図１】本発明シールド板開閉式ヘルメットにおけるシールド板開閉状態説明用斜視図である。
【図２】本発明のヘルメットにおけるシールド板の左右両端部を対応させた状態の説明図である。
【図３】本発明のヘルメットにおける支持部材とシールド板の第１の組み合わせ途中の状態の説明図である。
【図４】本発明のヘルメットにおける支持部材とシールド板の第２の組み合わせ途中の状態の説明図である。
【図５】本発明のヘルメットにおける支持部材とシールド板の組み合わせ最終状態の説明図である。
【図６】本発明のヘルメットにおける係合部の凹部と切り欠き部間の凸部との係合状態説明図である。
【図７】本発明のヘルメットにおける支持部材とシールド板の組み合わせ部を外側から見た分解斜視図である。
【図８】本発明のヘルメットにおける支持部材とシールド板の組み合わせ部を内側から見た分解斜視図である。
【図９】本発明のヘルメットにおけるヘルメット本体に対するシールド板の全閉状態の右側面説明図である。
【図１０】本発明のヘルメットにおけるヘルメット本体に対するシールド板の全開状態の右側面説明図である。
【図１１】本発明のヘルメットにおけるヘルメット本体に対するシールド板の少し開いた状態の右側面説明図である。
【図１２】本発明のヘルメットにおけるヘルメット本体に対するシールド板の僅かに開いた状態の右側面説明図である。
【符号の説明】
１……シールド板開閉式ヘルメット
２……ヘルメット本体
３……シールド板
４……案内溝
５……軸孔
６……軸孔を取り囲む後部辺
７Ａ、７Ｂ，７Ｃ……切り欠き部
８……軸部
８Ａ…軸部の残された部分
９……係合部
１０…ガイド部
１１…凸部
１３…内側面
１４…凸部
１５…凹部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shield plate opening / closing helmet used when riding on a motorcycle or the like.
[0002]
[Prior art]
As a method of opening and closing the shield plate in the conventional helmet, a cylindrical body formed on the mounting base material attached to the outer shell of the helmet body has a fully closed position holding formed in an arc-shaped guide groove formed on a side portion of the shield plate. Japanese Patent Application Laid-Open No. H10-107605 discloses a structure in which a shield plate can be sequentially opened and closed in a fully closed position, a defrost position, and a fully opened position with respect to a helmet body by a configuration that fits into a hole, a holding hole for a fully open position, and a holding hole for a defrost position. No. 1,686,638. In this method, since the concave portion and the convex portion are fitted to each other, the configuration for maintaining the opening degree of the shade plate in a predetermined state is simple. However, when the shade plate is slightly opened, wind substantially does not enter. It is not suitable to keep the opening degree such that fogging can be prevented. That is, in this conventional invention, the defrost position is shown at about 10 ° in the figure with respect to the fully closed position, and from the viewpoint of practicality, it is preferably any one of 6 ° to 15 °, and 8 ° to 13 °. The opening of the shade plate at the defrost position is relatively large, as described as being more preferable.
[0003]
In the above prior art, the length from the rotation center axis of the shade plate to the lower end of the front surface of the shade plate is generally 170 mm to 180 mm in order to widen the field of view through the shade plate. In this case, in the case where the opening degree is 6 ° to 15 ° in the shade plate having the above dimensions of 170 mm, the gap between the lower front end of the shade plate and the helmet body is about 18 mm to 44 mm. In the case of an opening of 6 ° to 15 ° in a shade plate having the above dimensions of 180 mm, the gap between the lower front end of the shade plate and the helmet body is about 19 mm to 47 mm.
[0004]
[Problems to be solved by the invention]
With such a degree of opening, when riding a motorcycle or the like, as the speed increases, the penetration of wind from that part increases, and the person wearing this helmet has many faces on his face Feeling the wind, it feels cold in winter, etc., and is not very desirable. In addition, it is sufficiently considered that rain may enter through this space or the left and right space due to the formation of such a space. The reason why such a relatively large gap is formed is that, in the above-described conventional technology, the cylindrical body portion formed on the mounting base material has the holding hole for the fully closed position of the arcuate guide groove formed on the side of the shield plate, Since it is formed by a configuration that fits into the holding hole for the position and the holding hole for the defrost position, it occurs because the interval between the holding holes cannot be reduced to some extent.
[0005]
Further, this prior art has a configuration in which a rotating shaft of the shield plate is supported by a washer that is screwed to the mounting base material. As described above, the fitting relationship portion between the arc-shaped guide groove formed on the side portion of the shield plate and the cylindrical body portion formed on the mounting base and the formation portion of the rotation axis of the shield plate are a combination of different members. However, in view of the close relationship between the two, it is desirable that the fitting-related portion and the rotating shaft of the shield plate are formed of a single member since assembly errors do not occur.
[0006]
The present invention has been made in view of the above circumstances, and provides a shield plate opening / closing type helmet that can maintain the opening / closing position of a shield plate at a plurality of angles with respect to a helmet body with a simple configuration. In addition, the shield plate can be stably held and can be easily attached to and detached from the support member without tools.Provide technical means.
[0007]
[Means for Solving the Problems]
The shield plate opening / closing helmet of the present invention is a helmet in which the right and left ends of a transparent synthetic resin shield plate are rotatably supported on the left and right outer sides of the helmet main body. An arcuate shaft hole formed in the lower part of the upwardly open guide groove, and a plurality of notches formed in a rear side surrounding the shaft hole and defining an open / close position of the shield plate with respect to the helmet body. The helmet body includes a circular shaft portion that fits into a shaft hole of the shield plate, and an engaging portion that fits into a plurality of cutout portions of the shield plate by elastic force, on both left and right outer sides of the helmet body. A pair of left and right synthetic resin support members are provided, and a part of the circular portion of the shaft portion is linear in the support member corresponding to the side wall of the guide groove on the rear side surrounding the shaft hole of the shield plate. Cut into pieces A guide portion having a given shape, and a convex portion that is located above the guide portion in front of the engaging portion and abuts on the inner surface of the front end portion of the rear side surrounding the shaft hole of the shield plate, and provided in the guide groove. The upper end of the rear side surrounding the shaft hole of the shield plate at the interval between the guide portion and the engagement portion is formed by a combination in which the guide portion and the corresponding circular peripheral surface portion of the shaft portion fit together. The shaft hole of the shield plate and the shaft portion of the support member are fitted in a state where the front end of the rear side surrounding the shaft hole of the shield plate rides on the protrusion at the final position of the fitting. The engaging portion is engaged with one of the cutout portions.
[0008]
As described above, the shield plate is provided with the guide groove, the arc-shaped shaft hole, and the plurality of notches that determine the open / close position of the shield plate, and the support member that supports the shield plate on the helmet body has a circular shape. By using a single synthetic resin in which the shaft portion, the engaging portion, the guide portion, and the convex portion are formed, the number of parts is small and assembly is easy. The mounting of the shield plate to the helmet body is achieved by a combination in which the guide portion and the corresponding circular portion of the shaft portion fit along the guide groove, and at the final position of the fit, Due to the elasticity of the front end of the rear side surrounding the shaft hole of the shield plate, the entire front end of the shield plate surrounding the shaft hole of the shield plate rides on the convex portion and the entirety of the shaft hole of the shield plate. Since the support member is fitted with the shaft portion, the shield plate is rotatably and stably supported. Further, the shield plate can be stably held and can be easily attached to and detached from the support member without tools.
[0009]
In addition, the gap between the shield plate and the helmet body is reduced as much as possible within the range where the fogging prevention effect is exhibited, and the shield plate is fully closed, fully opened, the air introduction position slightly opened, and the fogging prevention position further opened slightly. To be able to takeIn a helmet in which the left and right ends of a transparent synthetic resin shield plate are rotatably supported outside the left and right sides of the helmet main body, the left and right ends of the shield plate are provided under a guide groove opened upward. The formed arcuate shaft hole and a plurality of cutouts formed in the rear side surrounding the shaft hole and defining the open / close position of the shield plate with respect to the helmet body are provided. A pair of left and right synthetic resin support members each having a circular shaft portion fitted into a shaft hole of the shield plate, and an engagement portion fitted with a plurality of cutout portions of the shield plate by elastic force. The notch portion defines at least a notch portion for a fully closed position of the shield plate, a notch portion for a position slightly opened for wind introduction, and a notch portion for a full open position, and the engaging portion has Fully closed A notch for fitting between the notch portion for use and the notch portion for the slightly opened position is provided, and the shield plate is further opened by the fitting between the notch portion and the recess portion than the slightly opened position. Anti-fog positionIt can be configured to take.
[0010]
With this, it is possible to provide a shield plate opening / closing helmet that can maintain the opening and closing position of the shield plate at a plurality of angles with respect to the helmet body with a simple configuration, and fully close, fully open, and slightly open the air introduction position, and And an anti-fog position that is open to the outside. At the small open wind introduction position, air entering the inside of the shield plate can prevent the shield plate from fogging, but in warm seasonal conditions, helmet wearers feel comfortable even if a little wind is applied to the face. In cold seasons, I feel discomfort due to the cold. However, in the present invention, by opening with a slightly smaller opening degree than the small open wind introduction position, much less air flow than in the case of the small open wind introduction position is achieved. The opening degree is such that the feeling of discomfort due to the invading air to the wearer is reduced, and the effect of preventing the fogging of the shield plate is obtained.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described. 1 to 12 show an embodiment of the present invention. FIG. 1 is a perspective view for explaining a shield plate opening / closing state of the shield plate opening / closing type helmet of the present invention, FIG. 2 is an explanatory view showing a state where left and right end portions of the shield plate correspond to a support member, and FIG. FIG. 4 is an explanatory diagram of a state in the middle of the first combination of the plates, FIG. 4 is an explanatory diagram of a state in the middle of the second combination of the support member and the shield plate, and FIG. 5 is an explanatory diagram of a final state of the combination of the support member and the shield plate. 6 is an explanatory view of an engagement state between a concave portion of the engaging portion and a convex portion between the cutout portions, FIG. 7 is an exploded perspective view of a combined portion of the support member and the shield plate seen from the outside, and FIG. FIG. 9 is an exploded perspective view of the combined portion of the plates as viewed from the inside, FIG. 9 is a right side explanatory view of the shield plate in a fully closed state with respect to the helmet main body, FIG. Is a helmet book Explanatory right side view of a slightly open state of the shield plate with respect to, FIG. 12 is an explanatory right side view of a slightly open state of the shield plate to the helmet 1 Tsu bets body.
[0012]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the helmet 1 according to the present invention, the left and right ends of the transparent synthetic resin shield plate 3 are rotatably supported on the left and right outer sides of the helmet main body 2, and the front opening of the helmet main body 2 is opened by the shield plate 3. In the helmet 1 that opens and closes 20, an arc-shaped shaft hole 5 formed below the guide groove 4 opened upward and a rear side 6 surrounding the shaft hole 5 are formed at both left and right ends of the shield plate 3. A plurality of notches 7A, 7B, 7C are formed in an arcuate arrangement and determine the open / close position of the shield plate 3 with respect to the helmet main body 2. The shield plates 3 are provided on both left and right outer sides of the helmet main body 2. A pair of right and left synthetic resins each having a circular shaft portion 8 fitted into the shaft hole 5 of the first embodiment and an engaging portion 9 fitted to the plurality of cutout portions 7A, 7B, 7C of the shield plate 3 by elastic force. Made Providing the support member 12. The support member 12 is fixed to the left and right side surfaces of the helmet main body 2 with mounting screws 16A and 17A via mounting holes 16 and 17 as described later. The left and right ends of the shield plate 3 correspond to the outer side surfaces of the support member 12. . The engaging portion 9 is formed in a short cylindrical shape at the tip of an arm 21 extending so as to obtain elasticity at a part of the support member 12.
[0013]
In the support member 12, a part of the circular portion of the shaft portion 8 is cut linearly corresponding to the side wall 4A of the guide groove 4 on the rear side 6 surrounding the shaft hole 5 of the shield plate 3. A guide portion 10 having a shape and a convex portion 11 which is in front of the engaging portion 9 and above the guide portion 10 and which comes into contact with the inner surface of the front end of the rear side 6 surrounding the shaft hole 5 of the shield plate 3 are provided. The combination of the guide portion 10 and the corresponding circular portion of the shaft portion 8 fitted along the guide groove 4 allows the shield plate 3 to be positioned at the distance between the guide portion 10 and the engagement portion 9. The upper end of the rear side 6 surrounding the shaft hole 5 is inserted, and the distal end of the rear side 6 surrounding the shaft hole 5 of the shield plate 3 rides on the convex portion 11 at the final position of the fitting. The whole shaft hole 5 of the shield plate 3 and the shaft portion of the support member It becomes the fitting state between the engaging portion 9 is engaged with one of the notch.
[0014]
Thus, the shield plate 3 is provided with the guide groove 4, the arc-shaped shaft hole 5, and the plurality of cutouts that determine the open / close position of the shield plate 3, and the support for supporting the shield plate 3 on the helmet body. Since the member is made of a single synthetic resin having a circular shaft portion 8, an engaging portion 9, a guide portion 10, and a convex portion 11, the number of parts is small and assembly is easy. Further, the attachment of the shield plate 3 to the helmet body is achieved by a combination of the guide portion 10 and the corresponding circular portion of the shaft portion 8 fitted along the guide groove 4, and the final fitting is completed. In the position, the tip of the rear side 6 surrounding the shaft hole 5 of the shield plate 3 rides on the convex portion 11 due to the elasticity of the tip of the rear side 6 surrounding the shaft hole 5 of the shield plate 3. As a result, the entire shaft hole 5 of the shield plate 3 is fitted to the shaft portion 8 of the support member, so that the shield plate 3 is rotatably and stably supported.
[0015]
To explain this in more detail, in the shield plate opening / closing helmet 1 of the present invention, the guide portion 10 is located on the rear side 6 side of the circular portion of the shaft portion 8 surrounding the shaft hole 5 of the shield plate 3. The inner surface 13 of the remaining portion 8A of the shaft portion 8 is formed outside the guide portion 10 except that the inner portion 13A of the shaft portion 8 is cut out linearly except for the outer portion 8A on the side corresponding to the side wall 4A of the guide groove 4. Located at When the front part of the circular peripheral surface of the guide part 10 and the corresponding shaft part 8 corresponding to the guide part 10 are fitted along the guide groove 4, the tip of the rear side 6 surrounding the shaft hole 5 of the shield plate 3 The rear side 6 surrounding the shaft hole 5 of the shield plate 3 is elastically deformed while riding on the convex portion 11, and the inner surface 13 of the remaining portion 8A of the circular portion of the shaft portion 8 and the shield plate The rear side 6 surrounding the shaft hole 5 of the shield plate 3 contacts with the rear side 6 surrounding the shaft hole 5 of the shield plate 3 at the final position of the fitting. The whole and the shaft portion 8 of the support member are fitted together, and the engaging portion 9 is elastically engaged with the notch 7A. Thereby, the whole of the shaft hole 5 of the shield plate 3 and the shaft portion 8 of the support member can be fitted, and the rotation of the shield plate 3 is stabilized. In order to achieve such fitting, as shown in FIG. 2, the center line of the guide groove 4 and the center of the shaft hole 5 are in a state of being slightly shifted (indicated by G in FIG. 2).
[0016]
Further, the shield plate opening / closing helmet according to the present invention is the helmet 1 comprising the transparent synthetic resin shield plate 3 rotatably supported on the left and right outer sides of the helmet main body 2 at the left and right ends thereof. At the right and left ends of the helmet body 2, an arc-shaped shaft hole 5 formed below the guide groove 4 opened upward, and a rear side 6 surrounding the shaft hole 5, and A plurality of notches 7A, 7B, 7C for defining the open / close position of the helmet body, and a circular shaft portion 8 fitted into the shaft hole 5 of the shield plate 3 A pair of left and right synthetic resin support members having an engaging portion 9 fitted by elastic force to a plurality of cutout portions 7A, 7B, 7C of the shield plate 3 are provided, and the cutout portions 7A, 7B, 7C are provided. , At least before The notch 7B for the fully closed position, the notch 7C for the position slightly opened, and the notch 7A for the fully open position of the shield plate 3 are defined. And a concave portion 15 in which the convex portion 14 between the notch portions 7C for the slightly opened position is fitted, and the fitting between the convex portion 14 and the concave portion 15 further reduces the shield plate 3 from the position where the shield plate 3 is slightly opened. Take a slightly open anti-fog position.
[0017]
In order to prevent the fogging of the shield plate, it is preferable to open the shield plate 3 as small as possible within a range where the fogging prevention effect can be obtained. In principle, it is possible to achieve the object by making a plurality of small holes for preventing fogging in the shield plate and making a small air flow between the inside and the outside of the shield plate through the small holes at the fully closed position of the shield plate. However, if these small holes hinder visibility, or if a lot of rain is received in front of the shield plate, rain will enter the inside of the shield plate from these small holes and the see-through effect of the shield plate will be impaired. There is a problem that dust enters the hole and the portion becomes dirty, and it is difficult to set the position and size of the small hole in order to obtain a good fogging prevention effect. For this reason, in the present invention, not a method of forming a plurality of small holes but a method of obtaining a smaller opening degree in a mechanism in which the engaging portion 9 is fitted to the plurality of notches 7A, 7B, 7C by elastic force. To do.
[0018]
In a normal full-face helmet, it is necessary to prevent the shield plate from fogging as well as to keep the shield plate slightly open due to psychological factors such as user's coolness, breathlessness, and feeling of openness. However, according to the above-mentioned prior art method, as described above, it opens relatively widely even at the defrost position. The small open wind introduction position and the slightly open anti-fog position in the present invention are normally used when the traveling speed is lower than about 60 km / hour, and at a higher traveling speed, It is also conceivable that the wind cannot be used due to wind entrainment, wind noise, wind pressure, dry eyes, and the like. At a running speed of about 60 km / hour or less, a preferable value of such a small opening degree changes depending on a running pattern. In urban areas where there are many go and stops, low speed driving is required.When the temperature is high, a relatively large opening is required, and when traveling at a constant speed in a place with little signal, a relatively small opening is required. .
[0019]
In consideration of such conditions, in the present invention, from a practical point of view, the opening degree of the shield plate 3 with respect to the helmet body 2 can be easily reduced by a simple configuration with a smaller opening degree than that of the conventional art. It has a configuration that can be achieved. In the embodiment, two stages, i.e., the small open wind introduction position and the slightly open fogging prevention position can be selected, and the opening degree of the full open position is 45 ° to 55 °, The open wind introduction position was 6 ° to 12 °, and the slightly open anti-fog position was 2 ° to 6 °. It is not necessarily limited to this value, and this value may fluctuate. However, in this range, a practical helmet can be provided. In particular, the slightly opened anti-fog position is reduced to about 2 °. Can be achieved by a simple configuration.
[0020]
In the configuration of the present invention, a method of attaching and detaching the shield plate 3 will be described in detail. FIG. 2 shows a state in which the right and left ends of the shield plate 3 correspond to the support member 12. The distance P between the guide portion 10 and the corresponding circular portion of the shaft portion 8 is the same or slightly smaller than the width H of the guide groove 4. Also, the width R of the upper end 6A of the rear side 6 surrounding the shaft hole 5 of the shield plate 3 is slightly smaller than the distance L between the engaging portion 9 and the guide portion 10 on the extension of the guide portion 10. . The support member 12 has a flat recess 25 formed on the outer surface facing the rear side 6 surrounding the shaft hole 5 of the shield plate 3 so as to make the support member 12 thinner. With this relationship, the rear side 6 faces the depression 25, and the guide 10 slides relatively along one side of the guide groove 4 as shown in FIG. 4, the upper end 6A of the rear side 6 surrounding the shaft hole 5 of the shield plate 3 passes near the engaging portion 9, and the inclined surface 27 formed on the inner surface at the tip of the upper end 6A is formed as described above. The upper end 6 A comes into contact with the protrusion 11 and rides on the protrusion 11. In this state, the upper end portion 6A of the rear side 6 surrounding the shaft hole 5 of the shield plate 3 is pushed outward by the convex portion 11, and the elasticity of the rear side 6 surrounding the shaft hole 5 causes the convex portion 11 to be formed. It is in a pressed state. In the state of FIGS. 3 and 4, the portion of the shaft hole 5 below the side wall 4 A of the guide groove 4 on the rear side 6 surrounding the shaft hole 5 of the shield plate 3 is left by cutting off the guide portion 10 of the shaft portion 8. In the state shown in FIG. 4, the upper end portion 6A is pushed outward by the convex portion 11 as described above, so that the shaft hole in the lower portion of the side wall 4A of the guide groove 4 is provided. The five portions are in a state where the inner surface 13 is pressed. As a result, the rear side 6 surrounding the shaft hole 5 is warped outward by the convex portion 11, and the repulsive force due to elasticity is stored.
[0021]
When the engagement between the two further progresses from the state of FIG. 4, and the shaft hole 5 portion below the side wall 4 A of the guide groove 4 comes off the inner surface 13 of the portion 8 A left by cutting off the guide portion 10 of the shaft portion 8. Since the support of the stored repulsive force is released, the restoring force causes the lower portion of the side wall 4A of the guide groove 4 to remain as a result of the cutting of the guide portion 10 of the shaft portion 8 as shown in FIG. 8A is moved in the circumferential direction of the shaft portion 8A, and the entire circumferential surface of the shaft hole 5 is not loose on the circumferential surface of the portion 8A of the shaft portion 8 left by cutting off the guide portion 10 and the other circumferential surface of the shaft portion 8. Fit into. At the same time, the arm extends from the support member on which the engaging portion 9 is formed, and fits into the first cutout portion 7A by elasticity. In such a fitting, this state is a final fitting state.
[0022]
When the shield plate 3 is to be detached from the support member 12 in a case where the shield plate 3 is damaged, the peripheral portion of the shaft hole 5 below the side wall 4 A of the guide groove 4 is left by cutting off the guide portion 10, contrary to the above combination. The operation of releasing the combination between the support member 12 and the shield plate 3 is performed such that the support member 12 and the shield plate 3 are disengaged inside the peripheral surface of the part 8A. The shield plate 3 is detached from the support member 12 by sliding in the direction in which the shield plate 3 is disengaged. In this case, an inclined surface 28 is formed on the outer surface of the intersection between the lower part of the side wall 4A of the guide groove 4 and the peripheral part of the shaft hole 5, and the part of the peripheral part of the shaft hole 5 below the side wall 4A of the guide groove 4 is formed. However, the snagging resistance at the time of coming off inside the peripheral surface of the portion 8A left by the cutting of the guide portion 10 is reduced, and it is easy to take off.
[0023]
In the final fitting state, the shield plate 3 is rotatable around the shaft 8. This rotation range is from the fully closed state S1 to the fully opened state S4 with respect to the helmet body 2, and the state in which the engaging portion 9 is fitted into the first notch portion 7A is with respect to the window of the helmet body 2. This is the fully opened state S4 of the shield plate 3. The state in which the engaging portion 9 is fitted into the second cutout portion 7B is the fully closed state S1 of the shield plate 3 with respect to the window of the helmet body 2. For example, when the shield plate 3 is rotated around the shaft portion 8 against the elasticity of the engagement portion 9 from the fully opened state S4, the engagement portion 9 becomes an arc-shaped portion 26 of the rear side 6 surrounding the shaft hole 5. And slides along the arcuate portion 26 to fit into the next cutout portion 7C by its elasticity. If the person wearing the helmet wants to open the shield plate 3 slightly and take in air from the surroundings, the user is engaged with the third notch 7C formed next to the notch 7B in the fully closed state S1. This is achieved by fitting the mating parts 9 together.
[0024]
The state in which the engaging portion 9 is fitted into the third notch portion 7C is a small open wind introduction position S3, and the opening degree of the shield plate 3 is 6 ° to 12 ° as described above. With the shield plate 3 having a length of 172 mm from the center of rotation of the shield plate 3 to the lower end of the front surface of the shield plate 3, when the opening degree is 6 °, the gap between the lower end of the front surface of the shield plate 3 and the helmet body 2 is In the case of an opening of 12 °, the gap between the lower front end of the shield plate 3 and the helmet body 2 is about 36 mm.
[0025]
The present invention is characterized by a means for opening the shield plate 3 more narrowly than the small air introduction position S3 within a range in which fogging of the shield plate 3 can be prevented. That is, the engaging portion 9 is formed with the concave portion 15 into which the convex portion 14 formed at the end of the second cutout portion 7B fits. In the embodiment, a convex portion 14 is formed between the second cutout portion 7B and the third cutout portion 7C, and a concave portion 15 that fits therein is formed in the engaging portion 9. With this configuration, when the shield plate 3 is rotated around the shaft portion, the engaging portion 9 is disengaged from the notch portion fitted due to its elasticity, and the engaging portion 9 is fitted into the third notch portion 7C. Since the shield plate 3 can be opened with a smaller opening than the combined opening, the fogging prevention air flow opening state S2 in which the shield plate 3 is slightly opened can be formed. At the slightly open air flow position S2, the opening degree was set to 2 ° to 6 ° as described above. As a result, an opening degree substantially equal to or less than half of the opening degree by the third cutout portion 7C is obtained. In this way, by opening with a slightly smaller opening degree than the small open wind introduction position S3, much less air flows than in the case of the small open wind introduction position S3. The degree of opening is such that the wearer does not feel discomfort due to the invading air, and the degree of fogging prevention of the shield plate is obtained.
[0026]
If the size of the engaging portion 9 is reduced to reduce the notch into which the engaging portion 9 fits, a fine opening can be formed. However, the smaller the size, the more difficult it is to maintain the strength, which is a problem. However, in the present invention, even if the engaging portion 9 and the notch into which the engaging portion 9 is fitted are sufficiently large for maintaining the strength, a fine opening can be formed. For this reason, an opening smaller than that of the prior art disclosed in Japanese Patent Application Laid-Open No. 10-168638 can be obtained. Therefore, in the present invention, an effect which cannot be achieved by the prior art due to technical means that cannot be achieved by the prior art. Can be played.
[0027]
In the present invention, a flange 18 is formed at the outer end of the shaft portion 8 so that the support member 12 and the shield plate 3 can be stably engaged with each other. The peripheral portion 5 acts so as not to come off from the shaft portion 8. Further, a flange 19 is formed at an outer end of the engaging portion 9 so that the engaging portion 9 and the rear side 6 surrounding the shaft hole 5 do not come off.
[0028]
The support member 12 is fixed to the helmet main body 2 with mounting screws 16A and 17A through the mounting holes 16 and 17 in a state where the rear side 6 surrounding the shaft hole 5 is located on the outer surface of the support member 12. The combination of the shield plate 3 and the support member 12 is performed before fixing with the screws 16A and 17A, and the combination is fixed by the screws 16A and 17A. When the shield plate 3 is to be removed from the support member 12, the screw 16A, 17A can be removed by the above operation with the screws 16A, 17A removed, but usually, the screws 16A, 17A are not removed. Can be. That is, the shield plate 3 is fully opened without removing the screws 16A and 17A, and the shield plate 3 is strongly pulled in the direction opposite to the direction in which the shield plate 3 is attached to the support member 12 in the above-described sliding direction. 3 comes off the support member 12. When the shield plate 3 is to be re-attached, the shield plate 3 is slid with respect to the support member 12 with the support member 12 fixed to the helmet body 2 as described with reference to FIGS. It can also be achieved by combining up to the final fitting state. Thus, after the support member 12 is once positioned and fixed to the helmet main body 2, the shield plate 3 can be attached and detached without removing the attaching screws 16A and 17A.
[0029]
The present invention is not limited to the above-described embodiment, and various changes can be considered without departing from the technical scope of the present invention, and includes various embodiments according to the change.
[0030]
【The invention's effect】
According to the first aspect of the present invention, the shield plate is provided with a guide groove, an arc-shaped shaft hole, and a plurality of cutouts for defining the open / close position of the shield plate, and a support member for supporting the shield plate on the helmet body. Is made of a single synthetic resin having a circular shaft portion, an engaging portion, a guide portion, and a convex portion, so that the number of parts is small, and no errors occur during assembly, and the device is simplified. The mounting of the shield plate to the helmet body is achieved by a combination in which the guide portion and the corresponding circular portion of the shaft portion fit along the guide groove, and at the final position of the fit, Due to the elasticity of the front end of the rear side surrounding the shaft hole of the shield plate, the front end of the rear side surrounding the shaft hole of the shield plate rides on the convex portion and the shaft hole of the shield plate and the support member. Therefore, the shield plate is rotatably and stably supported. Further, the shield plate can be stably held, and can be easily attached and detached without tools in relation to the support member.
[Brief description of the drawings]
FIG. 1 is a perspective view for explaining a shield plate opening / closing state in a shield plate opening / closing helmet of the present invention.
FIG. 2 is an explanatory view of a state in which left and right ends of a shield plate correspond to each other in the helmet of the present invention.
FIG. 3 is an explanatory view of a state in which a support member and a shield plate are being combined in a first manner in the helmet of the present invention.
FIG. 4 is an explanatory view showing a state in which a support member and a shield plate are being combined in a second manner in the helmet of the present invention.
FIG. 5 is an explanatory diagram of a final state of a combination of a support member and a shield plate in the helmet of the present invention.
FIG. 6 is an explanatory view of an engagement state between a concave portion of an engaging portion and a convex portion between cutout portions in the helmet of the present invention.
FIG. 7 is an exploded perspective view of a combined portion of a support member and a shield plate in the helmet of the present invention as viewed from the outside.
FIG. 8 is an exploded perspective view of the combined portion of the support member and the shield plate in the helmet of the present invention, as viewed from the inside.
FIG. 9 is an explanatory right side view of the helmet of the present invention in a fully closed state of the shield plate with respect to the helmet body.
FIG. 10 is an explanatory right side view of the helmet of the present invention in a fully opened state of the shield plate with respect to the helmet body.
FIG. 11 is an explanatory right side view of the helmet of the present invention in a state where the shield plate is slightly opened with respect to the helmet body.
FIG. 12 is an explanatory right side view of the helmet of the present invention in a state where the shield plate is slightly opened with respect to the helmet body.
[Explanation of symbols]
1 ... Shield plate foldable helmet
2. Helmet body
3. Shield plate
4 ... Guide groove
5 ... Shaft hole
6 Rear edge surrounding shaft hole
7A, 7B, 7C: Notch
8 Shaft
8A: The remaining part of the shaft
9 ... engaging part
10. Guide part
11 ... convex part
13 ... Inside surface
14 ... convex part
15 ... recess

Claims

In a helmet in which the left and right ends of a transparent synthetic resin shield plate are rotatably supported outside the left and right sides of the helmet main body, the left and right ends of the shield plate are provided under a guide groove opened upward. The formed arcuate shaft hole and a plurality of cutouts formed in the rear side surrounding the shaft hole and defining the open / close position of the shield plate with respect to the helmet body are provided. A pair of left and right synthetic resin support members each having a circular shaft portion fitted into a shaft hole of the shield plate, and an engagement portion fitted with a plurality of cutout portions of the shield plate by elastic force. A guide portion having a shape in which a part of a circular portion of the shaft portion is cut linearly corresponding to a side wall of a guide groove on a rear side surrounding the shaft hole of the shield plate. , Of the engaging portion A convex portion that is located above the guide portion and abuts on the inner surface of the front end portion of the rear side surrounding the shaft hole of the shield plate, and the guide portion and the corresponding shaft portion along the guide groove. By the combination in which the circular peripheral surface portions are fitted, the upper end of the rear side surrounding the shaft hole of the shield plate is inserted into the space between the guide portion and the engaging portion, and the rear side surrounding the shaft hole of the shield plate is The final position of this fitting is such that the shaft hole of the shield plate and the shaft portion of the support member are fitted with the tip portion riding on the convex portion, and the engaging portion becomes one of the cutout portions. A shield plate opening and closing helmet that is in an engaged state.