JP2004129845A

JP2004129845A - Grip scissors

Info

Publication number: JP2004129845A
Application number: JP2002297394A
Authority: JP
Inventors: Katsumi Hasegawa; 長谷川　克己; Akimune Numata; 沼田　明宗
Original assignee: Kaijirushi Hamono Center KK
Current assignee: Kaijirushi Hamono Center KK
Priority date: 2002-10-10
Filing date: 2002-10-10
Publication date: 2004-04-30
Anticipated expiration: 2022-10-10
Also published as: JP4346884B2

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the opening/closing operations of both gripping parts 3 by improving the outer shape of a grip handle of grip scissors. <P>SOLUTION: An intermediate gripped surface 13 is recessed more than an imaginary plane connecting a base end side boundary part 14 between a base end side holding surface 11 and the intermediate gripped surface 13 and a tip side boundary part 15 between a tip side holding surface 12 and the intermediate gripped surface 13. The interval in opening and closing directions X between the tip side boundary parts 15 of both gripping parts 3 is set larger than the intervals in the opening and closing directions X between the base end side boundary parts 14 of both gripping parts 3, between the intermediate gripped surfaces 13 of both gripping parts 3, between the tip side gripped surfaces 12 of both gripped parts 3 and between the tip parts 3b of both gripping parts 3 at all times regardless of the open state and closed state of both gripping parts 3. The tip side gripped surface 12 is recessed more than the imaginary plane connecting the tip side boundary part 15 and the tip parts 3b of both gripping parts 3. An intermediate side face 19 and a tip side face 18 are recessed more than the imaginary plane connecting the base end side boundary part 14 between a base end side face 17 and the intermediate side face 19 and the tip parts 3b of both gripping parts 3. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、握り鋏において握り柄の外形状の改良に関するものである。
【０００２】
【従来の技術】
特許文献１にかかる握り鋏は、基端部から延設された両把持部（同公報の握り部２に該当）を有する握り柄（同公報の柄１に該当）と、この両把持部の先端部から延設された刃体（同公報の刃体７に該当）とを備えている。この両把持部の弾性力によりこの両刃体が両把持部とともに互いに開き、この両把持部の弾性力に抗してこの両刃体を両把持部とともに互いに閉じることができる。この両把持部には、開閉方向の両側でその開閉方向を含む面に対し直交する幅方向の把持面（同公報の滑り止め凹部９や指当て部１０を有する面の全体）が形成されている。この把持面は、両把持部の基端部から延びる基端側把持面（同公報の指当て部１０よりも基端側にある面）と、両把持部の先端部から延びる先端側把持面（同公報の指当て部１０よりも先端側にある面）と、この基端側把持面と先端側把持面との間で延びる中間把持面とに区画されている。この中間把持面（同公報の指当て部１０に該当）は、基端側把持面と中間把持面との間の基端側境界部と、先端側把持面と中間把持面との間の先端側境界部とを結ぶ想定平面よりも、凹んでいる。また、前記両把持部には、幅方向の両側で開閉方向の側面が形成されている。この側面は、前記基端側把持面を挟む基端側側面と、前記中間把持面を挟む中間側面と、前記先端側把持面を挟む先端側側面とに区画されている。
【０００３】
使用時には、両把持部を手の平により包み込んで親指と人差し指とを先端側把持面に当てがった状態で、中指を中間把持面に当てがう。
【０００４】
【特許文献１】
特開昭５７−１９５４８３号公報
【特許文献２】
実開昭５７−１４０２６３号公報
【特許文献３】
特開平１０−３３８４８号公報
【０００５】
【発明が解決しようとする課題】
上記特許文献１にかかる握り鋏は、下記＊の問題点がある。
＊　両把持部の先端側境界部間における開閉方向の間隔は、両把持部が開状態から閉状態になると、両把持部の基端側境界部間における開閉方向の間隔よりも小さくなる。そのため、両把持部の中間把持面（同公報の指当て部１０に該当）を凹ませても、両把持部の中間把持面間における開閉方向の間隔が基端側境界部側から先端側境界部側へ向かうに従い狭まり、先端側境界部が中間把持面から突出したストッパとしての機能を十分に果たすことができない。従って、中指が中間把持面から先端側境界部側へ滑り易くなって両把持部の開閉動作が行いにくくなる。
【０００６】
＊　両把持部の先端側把持面が平坦な形状に形成されているので、親指及び人差し指で丸みのある腹側をこの先端側把持面に対し確実に当てがうことが難しくなるとともに、親指及び人差し指がこの先端側把持面から先端側境界部側や先端部側へ滑り易くなって、両把持部の開閉動作が行いにくくなる。
【０００７】
＊　両把持部の先端側側面は、両把持部の先端側把持面における幅方向の幅寸法が先端側境界部側から両把持部の先端部側へ向かうに従い次第に狭くなる平坦な形状に形成されている。また、両把持部の中間側面は、互いに平行に形成されて平坦な形状になっている。しかし、両把持部を手の平により包み込んで親指と人差し指とを先端側把持面に当てがった状態で、中間側面及び先端側側面の膨らみが残り、人差し指を先端側把持面や先端側側面に当てがいにくくなるとともに、中指を中間把持面や中間側面に当てがいにくくなる。従って、両把持部の開閉動作が行いにくくなる。
【０００８】
なお、前記特許文献２や特許文献３も参照されたい。
この発明は、握り鋏において握り柄の外形状を改良して両把持部の開閉動作を行い易くすることを目的としている。
【０００９】
【課題を解決するための手段及び発明の効果】
後記実施形態の図面（図１〜６）の符号を援用して本発明を説明する。
＊　請求項１〜３の発明
請求項１〜３の発明にかかる握り鋏は、下記の共通構成を有している。
【００１０】
この握り鋏においては、基端部（３ａ）から延設した両把持部（３）を有する握り柄（１）と、この両把持部（３）の先端部（３ｂ）から延設した刃体（２）とを備え、この両把持部（３）の弾性力によりこの両刃体（２）が両把持部（３）とともに互いに開き、この両把持部（３）の弾性力に抗してこの両刃体（２）を両把持部（３）とともに互いに閉じることができる。前記握り柄（１）の両把持部（３）のうち開閉方向（Ｘ）の両側でその開閉方向（Ｘ）を含む面（Ｐ）に対し直交する幅方向（Ｙ）の把持面（１０）を、両把持部（３）の基端部（３ａ）から延びる基端側把持面（１１）と、両把持部（３）の先端部（３ｂ）から延びる先端側把持面（１２）と、この基端側把持面（１１）と先端側把持面（１２）との間で延びる中間把持面（１３）とに区画した場合、基端側把持面（１１）と中間把持面（１３）との間の基端側境界部（１４）と、先端側把持面（１２）と中間把持面（１３）との間の先端側境界部（１５）とを結ぶ想定平面（Ａ）よりも、中間把持面（１３）を凹ませている。なお、基端側境界部（１４）とは、任意性はあるが、基端側把持面（１１）がなす外形線と中間把持面（１３）がなす外形線とが互いに連続する変曲点または頂部または角部の付近などをいう。同じく、先端側境界部（１５）も、任意性はあるが、先端側把持面（１２）がなす外形線と中間把持面（１３）がなす外形線とが互いに連続する変曲点または頂部または角部の付近などをいう。
【００１１】
この請求項１〜３の発明では、いずれも、両把持部（３）を手の平（２０）により包み込んで親指（２１）と人差し指（２２）とを先端側把持面（１２）に当てがった状態で、中指（２３）を前記中間把持面（１３）に当てがった場合、この中間把持面（１３）を凹ませているので、中指（２３）で丸みのある腹側がこの中間把持面（１３）に沿って確実に当てがわれるとともに、中指（２３）がこの中間把持面（１３）から先端側境界部（１５）側へ滑りにくくなる。従って、両把持部（３）の開閉動作が行い易くなる。
【００１２】
さらに、請求項１の発明では、両把持部（３）の先端側境界部（１５）間における開閉方向（Ｘ）の間隔（Ｌ１５）は、両把持部（３）の基端側境界部（１４）間における開閉方向（Ｘ）の間隔（Ｌ１４）や、両把持部（３）の中間把持面（１３）間における開閉方向（Ｘ）の間隔（Ｌ１３）や、両把持部（３）の先端側把持面（１２）間における開閉方向（Ｘ）の間隔（Ｌ１２）や、両把持部（３）の先端部（３ｂ）間における開閉方向（Ｘ）の間隔（Ｌ３ｂ）よりも、両把持部（３）の開状態及び閉状態に関係なく常に、大きく設定されている。
【００１３】
この請求項１の発明では、先端側境界部（１５）が中間把持面（１３）から突出したストッパとしての機能を両把持部（３）の開状態及び閉状態に関係なく常に果たし、中指（２３）が中間把持面（１３）から先端側境界部（１５）側へより一層滑りにくくなって両把持部（３）の開閉動作が行い易くなる。
【００１４】
さらに、請求項２の発明では先端側境界部（１５）と両把持部（３）の先端部（３ｂ）とを結ぶ想定平面（Ｂ）よりも先端側把持面（１２）を凹ませている。
この請求項２の発明では、先端側把持面（１２）を凹ませているので、親指（２１）及び人差し指（２２）で丸みのある腹側がこの先端側把持面（１２）に沿って確実に当てがわれるとともに、親指（２１）及び人差し指（２２）がこの先端側把持面（１２）から先端側境界部（１５）側や先端部（３ｂ）側へ滑りにくくなる。従って、両把持部（３）の開閉動作がより一層行い易くなる。
【００１５】
さらに、請求項３の発明では、前記握り柄（１）の両把持部（３）のうち幅方向（Ｙ）の両側で開閉方向（Ｘ）の側面（１６）を、前記基端側把持面（１１）を挟む基端側側面（１７）と、前記中間把持面（１３）を挟む中間側面（１９）と、前記先端側把持面（１２）を挟む先端側側面（１８）とに区画した場合、基端側側面（１７）と中間側面（１９）との間の基端側境界部（１４）と、把持部（３）の先端部（３ｂ）または先端側側面（１８）上の頂部（１８ａ）とを結ぶ想定平面（Ｄ）よりも、中間側面（１９）及び先端側側面（１８）を凹ませている。なお、基端側境界部（１４）とは、任意性はあるが、基端側側面（１７）がなす外形線と中間側面（１９）がなす外形線とが互いに連続する変曲点付近などをいう。また、先端側側面（１８）上の頂部（１８ａ）とは、先端側側面（１８）を外側へ膨らませた場合、最も外側で高い位置にある部分をいう。
【００１６】
この請求項３の発明では、中間側面（１９）及び先端側側面（１８）を凹ませているので、両把持部（３）を手の平（２０）により包み込んで親指（２１）と人差し指（２２）とを先端側把持面（１２）に当てがった状態で、中間側面（１９）及び先端側側面（１８）の膨らみがなくなり、人差し指（２１）を先端側把持面（１２）や先端側側面（１８）に当てがい易くなるとともに、中指（２３）を中間把持面（１３）や中間側面（１９）に当てがい易くなる。従って、両把持部（３）の開閉動作がより一層行い易くなる。
【００１７】
＊　請求項４の発明
この発明は、請求項２の発明を前提として下記のように構成されている。
前記両把持部（３）の先端側境界部（１５）間における開閉方向（Ｘ）の間隔（Ｌ１５）は、両把持部（３）の先端部（３ｂ）間における開閉方向（Ｘ）の間隔（Ｌ３ｂ）よりも、両把持部（３）の開状態及び閉状態に関係なく常に、大きく設定されている。
【００１８】
この発明では、先端側境界部（１５）が先端側把持面（１２）から突出したストッパとしての機能を両把持部（３）の開状態及び閉状態に関係なく常に果たし、親指（２１）及び人差し指（２２）が先端側把持面（１２）から先端側境界部（１５）側へより一層滑りにくくなる。また、親指（２１）の腹側の向きが傾斜して親指（２１）の腹側の第一関節の屈曲度が大きくなるとともに、人差し指（２２）の腹側の向きも傾斜し、親指（２１）と人差し指（２２）との間で両把持部（３）の先端側を挟持し易くしかも力が入り易い把持状態となる。従って、両把持部（３）の開閉動作がより一層行い易くなる。
【００１９】
＊　請求項５の発明
この発明は、請求項１または請求項２または請求項４の発明を前提として下記のように構成されている。
【００２０】
前記両把持部（３）の基端側把持面（１１）間における開閉方向（Ｘ）の最大間隔（Ｌ１１）を、両把持部（３）の基端側境界部（１４）間における開閉方向（Ｘ）の間隔（Ｌ１４）や、両把持部（３）の基端部（３ａ）間における開閉方向（Ｘ）の間隔（Ｌ３ａ）と比較して、両把持部（３）の開状態及び閉状態に関係なく常に、大きく設定して基端側把持面（１１）を膨らませるか、または等しく設定している。
【００２１】
この発明では、両把持部（３）を手の平（２０）により安定性良く包み込んで把持し易くなり、両把持部（３）の開閉動作がより一層行い易くなる。
＊　請求項６の発明
この発明は、請求項３の発明を前提として下記のように構成されている。
【００２２】
前記基端側境界部（１４）における幅方向（Ｙ）の幅寸法（Ｗ１４）よりも、前記中間把持面（１３）における幅方向（Ｙ）の幅寸法（Ｗ１３）と、前記先端側境界部（１５）における幅方向（Ｙ）の幅寸法（Ｗ１５）とを小さく設定するとともに、この中間把持面（１３）における幅方向（Ｙ）の幅寸法（Ｗ１３）を、この先端側境界部（１５）における幅方向（Ｙ）の幅寸法（Ｗ１５）と比較して、大きく設定して中間側面（１３）を膨らませるか、または小さく設定して中間側面（１３）を凹ませるか、または等しく設定している。また、前記先端側把持面（１２）における幅方向（Ｙ）の幅寸法（Ｗ１２）を、前記先端側境界部（１５）における幅方向（Ｙ）の幅寸法（Ｗ１５）と比較して、等しく設定するか、または大きく設定して先端側側面（１８）を膨らませるか、または小さく設定して先端側側面（１８）を凹ませている。
【００２３】
この発明では、請求項３の発明の効果をより一層発揮させることができる。
＊　請求項７の発明
この発明は、請求項３または請求項６の発明を前提として下記のように構成されている。
【００２４】
前記基端側把持面（１１）における幅方向（Ｙ）の幅寸法（Ｗ１１）を、前記基端側境界部（１４）における幅方向（Ｙ）の幅寸法（Ｗ１４）や、両把持部（３）の基端部（３ａ）における幅方向（Ｙ）の幅寸法（Ｗ３ａ）と比較して、大きく設定して基端側側面（１７）を膨らませるか、または等しく設定している。
【００２５】
この発明では、両把持部（３）を手の平（２０）により安定性良く包み込んで把持し易くなり、両把持部（３）の開閉動作がより一層行い易くなる。
＊　請求項８の発明
この発明は、請求項１から請求項７のうちいずれかの請求項の発明を前提として下記のように構成されている。
【００２６】
前記握り柄（１）の両把持部（３）は、前記刃体（２）に取着された内側樹脂部（４）と、この内側樹脂部（４）における開閉方向（Ｘ）の両外側に取着された外側樹脂部（５）とを備えている。この両把持部（３）の外側樹脂部（５）は両把持部（３）の基端部（３ａ）で互いに一体に連続するとともに、この両把持部（３）の内側樹脂部（４）は両把持部（３）の基端部（３ａ）で互いに一体に連続してこの外側樹脂部（５）の内側で露出している。前記両把持部（３）の把持面（１０）及び側面（１１）はこの外側樹脂部（５）の表面に設けられている。この外側樹脂部（５）の表面硬度はこの内側樹脂部（４）の表面硬度よりも小さく設定されている。
【００２７】
この発明では、硬質の内側樹脂部（４）により刃体（２）を強固に取着することができるとともに、軟質の外側樹脂部（５）により把持感触が柔らかくなって両把持部（３）の開閉動作がより一層行い易くなる。
【００２８】
＊　第９の発明
この発明は、請求項１または請求項２または請求項４または請求項５の発明を前提として下記のように構成されている。
【００２９】
前記両把持部（３）の基端側境界部（１４）や、両把持部（３）の中間把持面（１３）や、両把持部（３）の先端側把持面（１２）や、両把持部（３）の先端部（３ｂ）は、それぞれ、両把持部（３）の開状態及び閉状態に関係なく常に、前記両把持部（３）の先端側境界部（１５）における開閉方向（Ｘ）の両端部を通る互いに平行な想定平面（Ｃ）間に位置している。この発明では、両把持部（３）を把持し易くなって両把持部（３）の開閉動作がより一層行い易くなる。
【００３０】
＊　第１０の発明
この発明は、第９の発明を前提として下記のように構成されている。
前記両把持部（３）の基端側把持面（１１）は、両把持部（３）の開状態及び閉状態に関係なく常に、前記両把持部（３）の先端側境界部（１５）における開閉方向（Ｘ）の両端部を通る互いに平行な想定平面（Ｃ）間に位置している。この発明では、両把持部（３）を把持し易くなって両把持部（３）の開閉動作がより一層行い易くなる。
【００３１】
＊　第１１の発明
この発明は、請求項３または請求項６または請求項７の発明を前提として下記のように構成されている。
【００３２】
前記中間側面（１９）や、先端側境界部（１５）や、先端側側面（１８）や、両把持部（３）の先端部（３ｂ）は、それぞれ、前記基端側境界部（１４）における幅方向（Ｙ）の両端部を通る互いに平行な想定平面（Ｅ）間に位置している。この発明では、両把持部（３）を把持し易くなって両把持部（３）の開閉動作がより一層行い易くなる。
【００３３】
＊　第１２の発明
この発明は、請求項３または請求項６または請求項７の発明を前提として下記のように構成されている。
【００３４】
前記基端側境界部（１４）や、中間側面（１９）や、先端側境界部（１５）や、先端側側面（１８）や、両把持部（３）の先端部（３ｂ）は、それぞれ、前記基端側把持面（１１）における幅方向（Ｙ）の両端部を通る互いに平行な想定平面（Ｆ）間に位置している。この発明では、両把持部（３）を把持し易くなって両把持部（３）の開閉動作がより一層行い易くなる。
【００３５】
【発明の実施の形態】
以下、本発明の一実施形態にかかる握り鋏について図面を参照して説明する。図１及び図２に示すように、握り鋏は握り柄１と両刃体２とからなる。この握り柄１は、樹脂によりＵ状に成形され、その基端部３ａから二股状に延設された把持部３を有している。この両把持部３は内側樹脂部４と外側樹脂部５とからなり、まず前記両刃体２がインサートされた金型によりこの内側樹脂部４が成形され、次にこの内側樹脂部４がインサートされた金型によりこの外側樹脂部５が成形される。この両把持部３の外側樹脂部５は、両把持部３の基端部３ａで互いに一体に連続して両把持部３の先端部３ｂまで延び、両把持部３の内側樹脂部４の外側に両把持部３の基端部３ａから先端部３ｂにわたり取着されている。この両把持部３の内側樹脂部４は、両把持部３の基端部３ａで互いに一体に連続して両把持部３の先端部３ｂまで延び、両把持部３の外側樹脂部５の内側で両把持部３の基端部３ａから先端部３ｂにわたり露出している。この外側樹脂部５には図１（ｄ）に示すようにこの内側樹脂部４を貫通して連結された複数の補強部５ａが成形されている。前記両刃体２は、刃先６ａを有する刃部６と、両把持部３の先端部３ｂで前記内側樹脂部４に取着された支持部７とからなる。この両刃体２の刃部６は両把持部３の先端部３ｂの外側で互いに重合し、この両刃部６の刃先６ａが相対向している。両把持部３の基端部３ａの付近で両把持部３の内側樹脂部４間には弾性部８が形成されている。両把持部３の先端部３ｂの付近で両把持部３の内側樹脂部４間には案内部９が形成されている。両刃体２は、この案内部９の範囲で、この弾性部８による弾性力により両把持部３とともに互いに開き、この弾性部８による弾性力に抗して両把持部３とともに互いに閉じる。
【００３６】
前記刃体２に取着された内側樹脂部４と、この内側樹脂部４における開閉方向Ｘの両外側に取着された外側樹脂部５とは、互いに性質の異なるものであり、ポリアセタールからなる内側樹脂部４の表面硬度は、オレフィン系熱可塑性エラストマーからなる外側樹脂部５の表面硬度よりも大きく設定されている。
【００３７】
次に、前記両把持部３の外形状の改良点を下記＊の場合に分けて詳述する。
＊　両把持部３の開閉方向Ｘを含む面Ｐ側から見た場合
両把持部３の外側樹脂部５の表面においては、開閉方向Ｘの両外側でその開閉方向Ｘを含む面Ｐに対し直交する幅方向Ｙの把持面１０が形成されている。この把持面１０は、両把持部３の基端部３ａから延びる基端側把持面１１と、両把持部３の先端部３ｂから延びる先端側把持面１２と、この基端側把持面１１と先端側把持面１２との間で延びる中間把持面１３とに区画される。その把持面１０の外形状とは、両把持部３の開閉方向Ｘを含む面Ｐ側から見てその把持面１０が延びる延長線のなす形状を意味し、例えば、把持面１０に多数の滑り止め凹凸部１０ａを形成したり、把持面１０の断面を平坦に形成したり凸形状や凹形状に形成したりしてもよい。
【００３８】
この両把持部３の把持面１０は下記・の特徴（図３，４も参照）を有する。
・　前記基端側把持面１１と中間把持面１３との間の基端側境界部１４と、前記先端側把持面１２と中間把持面１３との間の先端側境界部１５とを結ぶ想定平面Ａよりも、この中間把持面１３を凹ませている。この両把持部３の想定平面Ａ間の間隔ＬＡは、両把持部３の開状態及び閉状態に関係なく常に、両把持部３の基端側境界部１４間から両把持部３の先端側境界部１５間に至るに従い、次第に大きくなっている。
【００３９】
・　前記先端側境界部１５と把持部３の先端部３ｂとを結ぶ想定平面Ｂよりも、前記先端側把持面１２を凹ませている。なお、この先端側把持面１２における凹みは必ずしも必要ではなく、先端側把持面１２を想定平面Ｂ上に形成して平坦な形状にしてもよい。
【００４０】
・　前記両把持部３の想定平面Ｂ間の間隔ＬＢは、両把持部３の開状態及び閉状態に関係なく常に、両把持部３の先端側境界部１５間から両把持部３の先端部３ｂ間に至るに従い、次第に小さくなっている。この両把持部３の先端側境界部１５の端部間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ｂ間の間隔Ｌ１５）は、両把持部３の先端部３ｂの端部間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ｂ間の間隔Ｌ３ｂ）よりも、両把持部３の開状態及び閉状態に関係なく常に、大きく設定されている。なお、この両把持部３の想定平面Ｂ間の間隔ＬＢは、両把持部３の開状態で、両把持部３の想定平面Ｂを互いに平行にして、両把持部３の先端側境界部１５間から両把持部３の先端部３ｂ間に至るまで、同一にしてもよい。
【００４１】
・　前記両把持部３の先端側境界部１５の端部間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ｂ間の間隔）を前述したようにＬ１５とする。前記両把持部３の基端側境界部１４の端部間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ａ間の間隔）をＬ１４とする。前記両把持部３の中間把持面１３間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ａ間の間隔）をＬ１３とする。前記両把持部３の先端側把持面１２間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ｂ間の間隔）をＬ１２とする。前記両把持部３の先端部３ｂの端部間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ｂ間の間隔）をＬ３ｂとする。この間隔Ｌ１５は、これらの間隔Ｌ１４，Ｌ１３，Ｌ１２，Ｌ３ｂよりも、両把持部３の開状態及び閉状態に関係なく常に、大きく設定されている。
【００４２】
・　前記両把持部３の基端側把持面１１間における開閉方向Ｘの最大間隔Ｌ１１を、両把持部３の基端側境界部１４の端部間における開閉方向Ｘの間隔（前記両把持部３の想定平面Ａ間の間隔Ｌ１４）よりも、両把持部３の開状態及び閉状態に関係なく常に、大きく設定して基端側把持面１１を膨らませている。なお、二点鎖線で示すように、両把持部３の開状態で、これらの間隔Ｌ１１，Ｌ１４を互いに等しく設定して基端側把持面１１を平坦な形状にしてもよい。また、前記両把持部３の基端部３ａの端部間における開閉方向Ｘの最大間隔Ｌ３ａよりも、両把持部３の開状態及び閉状態に関係なく常に、この最大間隔Ｌ１１を大きく設定して基端側把持面１１を膨らませている。
【００４３】
・　前記両把持部３の先端側境界部１５における開閉方向Ｘの両端部を通る互いに平行な想定平面をＣとする。前記両把持部３の基端側境界部１４や、両把持部３の中間把持面１３や、両把持部３の先端側把持面１２や、両把持部３の先端部３ｂや、両把持部３の基端側把持面１１は、それぞれ、両把持部３の開状態及び閉状態に関係なく常に、前記想定平面Ｃ間に位置している。
【００４４】
＊　両把持部３の開閉方向Ｘに直交する幅方向Ｙを含む面Ｑ側から見た場合
両把持部３の外側樹脂部５の表面においては、幅方向Ｙの両外側で開閉方向Ｘの側面１６が形成されている。この側面１６は、前記基端側把持面１１を挟む基端側側面１７と、前記先端側把持面１２を挟む先端側側面１８と、この基端側側面１７と先端側側面１８との間で前記中間把持面１３を挟む中間側面１９とに区画される。その側面１６の外形状とは、両把持部３の開閉方向Ｘに対し直交する幅方向Ｙを含む面Ｑ側から見てその側面１６が延びる延長線のなす形状を意味し、側面１６に多数の滑り止め凹凸部を形成したり、側面１６の断面を平坦に形成したり凸形状や凹形状に形成したりしてもよい。
【００４５】
この両把持部３の側面１６は下記・の特徴（図５も参照）を有する。
・　前記基端側側面１７と中間側面１９との間の基端側境界部１４と、前記把持部３の先端部３ｂとを結ぶ想定平面Ｄよりも、この中間側面１９及び先端側側面１８を凹ませている。
【００４６】
・　前記先端側把持面１２における幅方向Ｙの幅寸法Ｗ１２を、前記先端側境界部１５における幅方向Ｙの幅寸法Ｗ１５と等しく設定する。なお、二点鎖線で示すように、この幅寸法Ｗ１２をこの幅寸法Ｗ１５よりも、大きく設定して先端側側面１８を膨らませるか、または小さく設定して先端側側面１８を凹ませてもよい。先端側側面１８を膨らませた場合には、この先端側側面１８上の頂部１８ａと基端側境界部１４とを結ぶ想定平面Ｄよりも、中間側面１９及び先端側側面１８を凹ませる。
【００４７】
・　前記基端側境界部１４における幅方向Ｙの幅寸法Ｗ１４よりも、前記中間把持面１３における幅方向Ｙの幅寸法Ｗ１３と、前記先端側境界部１５における幅方向Ｙの幅寸法Ｗ１５とを小さく設定している。また、この中間把持面１３における幅方向Ｙの幅寸法Ｗ１３を、この先端側境界部１５における幅方向Ｙの幅寸法Ｗ１５よりも、大きく設定して中間把持面１３を膨らませている。なお、二点鎖線で示すように、この幅寸法Ｗ１３をこの幅寸法Ｗ１５よりも小さく設定して中間把持面１３を凹ませるか、またはこの幅寸法Ｗ１３をこの幅寸法Ｗ１５と等しく設定してもよい。
【００４８】
・　前記基端側把持面１１における幅方向Ｙの最大幅寸法Ｗ１１を、前記基端側境界部１４における幅方向Ｙの幅寸法Ｗ１４や、両把持部３の基端部３ａにおける幅方向Ｙの幅寸法Ｗ３ａよりも、大きく設定して基端側把持面１１を膨らませている。なお、二点鎖線で示すように、この幅寸法Ｗ１１をこの幅寸法Ｗ１４と等しく設定してもよい。
【００４９】
・　前記中間側面１９や、先端側境界部１５や、先端側側面１８や、両把持部３の先端部３ｂは、それぞれ、前記基端側境界部１４における幅方向Ｙの両端部を通る互いに平行な想定平面Ｅ間に位置している。
【００５０】
・　前記基端側境界部１４や、中間側面１９や、先端側境界部１５や、先端側側面１８や、両把持部３の先端部３ｂは、それぞれ、前記基端側側面１７における幅方向Ｙの両頂部１７ａを通る互いに平行な想定平面Ｆ間に位置している。
【００５１】
次に、上記握り鋏の使い方の一例について述べる。
図６に示すように、握り柄１の両把持部３を手の平２０で包み込み、親指２１における指先から第一関節までの間の腹側を上側の先端側把持面１２に当てがうとともに、人差し指２２における指先から第一関節までの間の腹側を下側の先端側把持面１２に当てがう。このようにして親指２１と人差し指２２との間で両把持部３の先端側を挟持した状態で、中指２３における第一関節から第二関節までの間の腹側を下側の中間把持面１３に当てがうとともに、中指２３における指先から第一関節までの間の腹側を手の平２０に面して中間把持面１３から中間側面１９に回り込ませる。なお、薬指２４の腹側と小指２５の腹側は、手の平２０に面して基端側把持面１１から基端側側面１７に回り込ませる。このような把持状態で、親指２１と人差し指２２とに力を加えると、両刃体２を両把持部３とともに互いに閉じることができる。また、親指２１及び人差し指２２の力を緩めると、両刃体２を両把持部３とともに互いに開くことができる。
【図面の簡単な説明】
【図１】（ａ）は本実施形態にかかる握り鋏を両把持部の開閉方向を含む面側から見た場合において開状態を示す図であり、（ｂ）はこの握り鋏を両把持部の開閉方向に直交する幅方向を含む面側から見た場合において開状態を示す図であり、（ｃ）はこの握り鋏において握り柄の基端部を示す図であり、（ｄ）は（ａ）のＺ−Ｚ線断面図である。
【図２】（ａ）は上記握り鋏を両把持部の開閉方向を含む面側から見た場合において閉状態を示す図であり、（ｂ）は上記握り鋏の斜視図である。
【図３】図１（ａ）に示す両把持柄の外形状を説明するための図である。
【図４】図２（ａ）に示す両把持柄の外形状を説明するための図である。
【図５】図１（ｂ）に示す両把持柄の外形状を説明するための図である。
【図６】（ａ）は図１（ａ）に示す握り柄を把持した状態の一例を示す図であり、（ｂ）は図１（ｂ）に示す握り柄を把持した状態の一例を示す図である。
【符号の説明】
１…握り柄、２…刃体、３…把持部、３ａ…基端部、３ｂ…先端部、４…内側樹脂部、５…外側樹脂部、１０…把持面、１１…基端側把持面、１２…先端側把持面、１３…中間把持面、１４…基端側境界部、１５…先端側境界部、１６…側面、１７…基端側側面、１８…先端側側面、１８ａ…頂部、１９…中間側面、Ａ，Ｂ，Ｄ…想定平面、Ｐ…面、Ｘ…開閉方向、Ｙ…幅方向、Ｌ１１，Ｌ１２，Ｌ１３，Ｌ１４，Ｌ１５，Ｌ３ａ，Ｌ３ｂ…間隔、Ｗ１１，Ｗ１２，Ｗ１３，Ｗ１４，Ｗ１５，Ｗ３ａ…幅寸法。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to improvement of the outer shape of a grip handle in grip scissors.
[0002]
[Prior art]
The grip scissors according to Patent Literature 1 have a grip handle (corresponding to handle 1 in the same publication) having both grip portions (corresponding to grip portion 2 in the same publication) extending from the base end portion, and a grip handle of both grip portions. And a blade body (corresponding to the blade body 7 in the publication) extending from the distal end portion. The two blades are opened together with the two grips by the elastic force of the two grips, and the two blades can be closed together with the two grips against the elastic force of the two grips. Both gripping portions are formed with gripping surfaces in the width direction orthogonal to a surface including the opening / closing direction on both sides in the opening / closing direction (the entire surface having the anti-slip recess 9 and the finger rest 10 in the same publication). I have. The grip surface includes a proximal grip surface extending from the proximal ends of both grip portions (a surface closer to the proximal end than the finger contact portion 10 of the publication) and a distal grip surface extending from the distal ends of both grip portions. (A surface on the distal end side of the finger rest 10 in the publication) and an intermediate gripping surface extending between the proximal gripping surface and the distal gripping surface. The intermediate gripping surface (corresponding to the finger contact portion 10 in the publication) includes a proximal boundary between the proximal gripping surface and the intermediate gripping surface, and a distal end between the distal gripping surface and the intermediate gripping surface. It is more concave than the assumed plane connecting the side boundaries. In addition, side surfaces in the opening and closing direction are formed on both sides in the width direction of the both grip portions. The side surface is divided into a base side surface sandwiching the base grip surface, an intermediate side surface sandwiching the intermediate grip surface, and a distal side surface sandwiching the distal grip surface.
[0003]
In use, the middle finger is applied to the intermediate gripping surface in a state where both grips are wrapped in the palm and the thumb and forefinger are applied to the distal-side gripping surface.
[0004]
[Patent Document 1]
JP-A-57-195483
[Patent Document 2]
Japanese Utility Model Publication No. 57-140263
[Patent Document 3]
JP-A-10-33848
[0005]
[Problems to be solved by the invention]
The grip scissors according to Patent Document 1 have the following problem *.
* The distance in the opening / closing direction between the boundary portions on the distal side of both grip portions becomes smaller than the distance in the opening / closing direction between the proximal side boundary portions of both grip portions when both grip portions are changed from the open state to the closed state. Therefore, even if the intermediate gripping surfaces of both gripping portions (corresponding to the finger contact portions 10 in the publication) are depressed, the distance between the intermediate gripping surfaces of both gripping portions in the opening / closing direction is changed from the proximal boundary to the distal boundary. It becomes narrower toward the part side, and the front end side boundary part cannot sufficiently function as a stopper protruding from the intermediate gripping surface. Therefore, the middle finger is easily slid from the intermediate gripping surface to the front boundary side, and it is difficult to open and close both gripping portions.
[0006]
* Since the gripping surfaces on the distal side of both gripping portions are formed in a flat shape, it is difficult to securely apply the rounded belly to the gripping surface on the distal side with the thumb and forefinger. The index finger easily slides from the distal-side grip surface to the distal-side boundary portion side or the distal-end portion side, and the opening and closing operation of both grip portions becomes difficult.
[0007]
* The tip side surfaces of both grip portions are formed in a flat shape in which the width dimension in the width direction of the tip grip surfaces of both grip portions gradually becomes narrower from the border portion on the tip side toward the tip portion of both grip portions. ing. The intermediate side surfaces of both grip portions are formed parallel to each other and have a flat shape. However, with both grips wrapped in the palm and the thumb and forefinger applied to the distal gripping surface, the bulges of the middle side and the distal side remain, and the index finger is applied to the distal gripping surface and the distal side. In addition, it becomes difficult to apply the middle finger to the intermediate gripping surface and the intermediate side surface. Therefore, it is difficult to perform the opening / closing operation of both gripping portions.
[0008]
It should be noted that Patent Document 2 and Patent Document 3 are also referred to.
SUMMARY OF THE INVENTION It is an object of the present invention to improve the outer shape of a grip handle in grip scissors to facilitate opening and closing operations of both grip portions.
[0009]
Means for Solving the Problems and Effects of the Invention
The present invention will be described with reference to the reference numerals of the drawings (FIGS. 1 to 6) of the following embodiments.
* Claims 1-3
The grip scissors according to the first to third aspects of the present invention have the following common configuration.
[0010]
In this grip scissors, a grip handle (1) having both grips (3) extending from a base end (3a), and a blade body extending from a distal end (3b) of the grips (3). (2), the two blades (2) are opened together with the two grips (3) by the elastic force of the two grips (3), and the two blades (2) are opened against the elastic force of the two grips (3). Both blades (2) can be closed together with both grips (3). The grip surface (10) in the width direction (Y) orthogonal to the plane (P) including the opening / closing direction (X) on both sides of the gripping portion (3) of the grip handle (1) in the opening / closing direction (X). A proximal gripping surface (11) extending from the proximal end (3a) of both grips (3), a distal gripping surface (12) extending from the distal end (3b) of both grips (3), When divided into an intermediate gripping surface (13) extending between the proximal gripping surface (11) and the distal gripping surface (12), the proximal gripping surface (11) and the intermediate gripping surface (13) are separated. Between the base-side boundary portion (14) and the front-side boundary portion (15) between the distal-side gripping surface (12) and the intermediate gripping surface (13). The gripping surface (13) is recessed. The base end boundary (14) has an arbitrary property, but is an inflection point where the outline formed by the base gripping surface (11) and the outline formed by the intermediate gripping surface (13) are continuous with each other. Or near the top or corner. Similarly, although the distal end side boundary part (15) is optional, the inflection point or the top or the inflection point where the outline formed by the distal end gripping surface (12) and the outline formed by the intermediate gripping surface (13) are continuous with each other. Refers to the vicinity of a corner.
[0011]
In any of the first to third aspects of the present invention, both the grips (3) are wrapped in the palm (20), and the thumb (21) and the index finger (22) are applied to the distal-side grip surface (12). When the middle finger (23) is applied to the intermediate gripping surface (13) in this state, the middle gripping surface (13) is recessed. While being securely applied along (13), the middle finger (23) is less likely to slip from the intermediate gripping surface (13) toward the front end side boundary portion (15). Therefore, the opening / closing operation of both grip portions (3) is facilitated.
[0012]
Further, according to the first aspect of the present invention, the distance (L15) in the opening / closing direction (X) between the boundary portions (15) on the distal side of the grip portions (3) is determined by the boundary portion (L15) on the base end side of the grip portions (3). 14), the distance (L14) in the opening / closing direction (X) between the two gripping parts (3), the distance (L13) in the opening / closing direction (X) between the intermediate gripping surfaces (13), and the distance between the two gripping parts (3). The distance (L12) in the opening / closing direction (X) between the front gripping surfaces (12) and the distance (L3b) in the opening / closing direction (X) between the distal ends (3b) of both gripping portions (3) are both larger. Regardless of the open state and the closed state of the section (3), it is always set large.
[0013]
According to the first aspect of the present invention, the front-end-side boundary portion (15) always functions as a stopper protruding from the intermediate gripping surface (13) irrespective of the open state and the closed state of both grip portions (3). 23) is more difficult to slide from the intermediate gripping surface (13) to the front end side boundary portion (15) side, and the opening and closing operation of both gripping portions (3) becomes easier.
[0014]
Further, in the invention of claim 2, the distal-side grip surface (12) is recessed from an assumed plane (B) connecting the distal-side boundary portion (15) and the distal end portions (3b) of both grip portions (3). .
According to the second aspect of the present invention, since the distal-side gripping surface (12) is recessed, the rounded abdominal side with the thumb (21) and the index finger (22) is surely formed along the distal-side gripping surface (12). At the same time, the thumb (21) and the forefinger (22) are less likely to slip from the distal-side grip surface (12) toward the distal-side boundary (15) or the distal end (3b). Therefore, the opening / closing operation of both grip portions (3) is further facilitated.
[0015]
Further, in the invention of claim 3, the side surface (16) in the opening / closing direction (X) on both sides in the width direction (Y) of the both grip portions (3) of the grip handle (1) is the base-side grip surface. It is divided into a base side surface (17) sandwiching (11), an intermediate side surface (19) sandwiching the intermediate gripping surface (13), and a distal side surface (18) sandwiching the distal gripping surface (12). In that case, the proximal boundary (14) between the proximal side (17) and the intermediate side (19) and the top on the distal end (3b) or distal side (18) of the gripper (3). The intermediate side surface (19) and the tip side surface (18) are recessed from the assumed plane (D) connecting the (18a). The proximal boundary (14) is optional, but may be in the vicinity of an inflection point where the outline formed by the base side surface (17) and the outline formed by the intermediate side surface (19) are continuous with each other. Say. Further, the top portion (18a) on the distal side surface (18) refers to a portion located at the highest position on the outermost side when the distal side surface (18) is expanded outward.
[0016]
According to the third aspect of the present invention, since the intermediate side surface (19) and the front end side surface (18) are recessed, both the grips (3) are wrapped by the palm (20), and the thumb (21) and the index finger (22) are formed. Is applied to the distal-side grip surface (12), the swelling of the intermediate side surface (19) and the distal-side side surface (18) is eliminated, and the index finger (21) is moved to the distal-side grip surface (12) or the distal-side side surface. (18) and the middle finger (23) can be easily applied to the intermediate gripping surface (13) and the intermediate side surface (19). Therefore, the opening / closing operation of both grip portions (3) is further facilitated.
[0017]
* Claim 4
The present invention is configured as follows on the premise of the invention of claim 2.
The distance (L15) in the opening and closing direction (X) between the front end side boundary portions (15) of the two grips (3) is the distance in the opening and closing direction (X) between the front ends (3b) of both grips (3). It is always set to be larger than (L3b) irrespective of the open state and the closed state of both grip portions (3).
[0018]
According to the present invention, the tip side boundary portion (15) always functions as a stopper protruding from the tip side gripping surface (12) regardless of the open state and the closed state of the two grip portions (3), and the thumb (21) and the thumb (21) The index finger (22) is less likely to slide from the distal-side grip surface (12) to the distal-side boundary (15). In addition, the abdominal direction of the thumb (21) is inclined to increase the degree of flexion of the first joint on the abdominal side of the thumb (21), and the abdominal direction of the index finger (22) is also inclined. ) And the forefinger (22) are in a gripping state in which the distal ends of both grips (3) are easily nipped and force is easily applied. Therefore, the opening / closing operation of both grip portions (3) is further facilitated.
[0019]
* Claim 5
The present invention is configured as follows on the premise of the invention of claim 1, claim 2, or claim 4.
[0020]
The maximum distance (L11) in the opening / closing direction (X) between the proximal gripping surfaces (11) of the grippers (3) is determined by the opening / closing direction between the proximal boundary portions (14) of the grippers (3). Compared with the interval (L14) of (X) and the interval (L3a) in the opening and closing direction (X) between the base ends (3a) of both grips (3), the open state of both grips (3) and Regardless of the closed state, the base-side gripping surface (11) is always set to a large value so as to be inflated or set to be equal.
[0021]
According to the present invention, both the grips (3) are more stably wrapped in the palm (20), and gripping is facilitated, and the opening and closing operation of the grips (3) is further facilitated.
* Claim 6
The present invention is configured as follows based on the invention of claim 3.
[0022]
A width dimension (W13) in the width direction (Y) on the intermediate gripping surface (13) and a width dimension (W13) in the width direction (Y) of the proximal end boundary section (14); The width dimension (W15) in the width direction (Y) in (15) is set small, and the width dimension (W13) in the width direction (Y) on the intermediate gripping surface (13) is set to ) Is set to be larger than the width dimension (W15) in the width direction (Y) in (Y) to expand the intermediate side surface (13), or is set to be smaller and the intermediate side surface (13) is depressed or set equal. are doing. Further, the width dimension (W12) in the width direction (Y) on the distal-side gripping surface (12) is equal to the width dimension (W15) in the width direction (Y) at the distal-side boundary portion (15). The tip side surface (18) is set to be larger or set to be larger, or the tip side surface (18) is set to be smaller to make the tip side surface (18) concave.
[0023]
According to this invention, the effect of the invention of claim 3 can be further exhibited.
* Claim 7
The present invention is configured as follows on the premise of the invention of claim 3 or claim 6.
[0024]
The width dimension (W11) in the width direction (Y) on the base-side gripping surface (11) is changed to the width dimension (W14) in the width direction (Y) on the base-side boundary portion (14), and both grip portions ( As compared with the width dimension (W3a) in the width direction (Y) at the base end portion (3a) of (3), the base end side surface (17) is set to be larger or set to be equal.
[0025]
According to the present invention, both the grips (3) are more stably wrapped in the palm (20), and gripping is facilitated, and the opening and closing operation of the grips (3) is further facilitated.
* Claim 8
This invention is configured as described below on the premise of the invention of any one of claims 1 to 7.
[0026]
Both grip portions (3) of the grip handle (1) have an inner resin portion (4) attached to the blade body (2) and both outer portions in the opening and closing direction (X) of the inner resin portion (4). And an outer resin portion (5) attached to the outer resin portion. The outer resin portions (5) of the two grip portions (3) are integrally and continuously connected to each other at base ends (3a) of the both grip portions (3), and the inner resin portions (4) of the both grip portions (3). Are integrally and continuously formed at base end portions (3a) of both grip portions (3) and are exposed inside the outer resin portion (5). The grip surface (10) and the side surface (11) of both grip portions (3) are provided on the surface of the outer resin portion (5). The surface hardness of the outer resin portion (5) is set smaller than the surface hardness of the inner resin portion (4).
[0027]
According to the present invention, the blade body (2) can be firmly attached by the hard inner resin part (4), and the grip feel is softened by the soft outer resin part (5), so that the two grip parts (3) are softened. Opening / closing operation becomes easier.
[0028]
* Ninth invention
The present invention is configured as follows based on the invention of claim 1 or claim 2 or claim 4 or claim 5.
[0029]
The base-side boundary portion (14) of the grip portions (3), the intermediate grip surface (13) of the grip portions (3), the distal grip surface (12) of the grip portions (3), The tip (3b) of the grip (3) always opens and closes at the front-end boundary (15) of the grips (3) regardless of the open and closed states of the grips (3). It is located between mutually parallel assumed planes (C) passing through both ends of (X). According to the present invention, it is easy to hold the two grip portions (3), and the opening and closing operation of the both grip portions (3) is further facilitated.
[0030]
* Tenth invention
This invention is configured as follows on the premise of the ninth invention.
The proximal gripping surfaces (11) of the grips (3) are always at the distal boundary (15) of the grips (3) regardless of the open and closed states of the grips (3). Are located between the assumed parallel planes (C) passing through both ends in the opening and closing direction (X). According to the present invention, it is easy to hold the two grip portions (3), and the opening and closing operation of the both grip portions (3) is further facilitated.
[0031]
* Eleventh invention
The present invention is configured as follows on the premise of the invention of claim 3 or claim 6 or claim 7.
[0032]
The intermediate side surface (19), the distal side boundary portion (15), the distal side surface (18), and the distal end portions (3b) of both grip portions (3) are respectively the base side boundary portion (14). Are located between assumed parallel planes (E) passing through both ends in the width direction (Y). According to the present invention, it is easy to hold the two grip portions (3), and the opening and closing operation of the both grip portions (3) is further facilitated.
[0033]
* Twelfth invention
The present invention is configured as follows on the premise of the invention of claim 3 or claim 6 or claim 7.
[0034]
The base side boundary portion (14), the intermediate side surface (19), the front side boundary portion (15), the front side surface (18), and the front end portions (3b) of both grip portions (3) are respectively provided. Are located between assumed parallel planes (F) passing through both ends in the width direction (Y) of the base-side gripping surface (11). According to the present invention, it is easy to hold the two grip portions (3), and the opening and closing operation of the both grip portions (3) is further facilitated.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, grip scissors according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the grip scissors include a grip handle 1 and a double blade body 2. The grip handle 1 is formed in a U-shape with a resin, and has a grip portion 3 extending bifurcated from a base end 3a. The two grip portions 3 are composed of an inner resin portion 4 and an outer resin portion 5. First, the inner resin portion 4 is molded by a mold into which the both blades 2 are inserted, and then the inner resin portion 4 is inserted. The outer resin portion 5 is molded by the mold. The outer resin portions 5 of the both grip portions 3 extend integrally and continuously at the base end portions 3a of the both grip portions 3 to the distal end portions 3b of the both grip portions 3, and extend outside the inner resin portion 4 of the both grip portions 3. Are attached from the base end 3a to the distal end 3b of both gripping portions 3. The inner resin portions 4 of the grip portions 3 extend integrally and continuously at the base end portions 3 a of the grip portions 3 to the distal end portions 3 b of the grip portions 3, and extend inside the outer resin portions 5 of the grip portions 3. Thus, both grip portions 3 are exposed from the base end 3a to the distal end 3b. As shown in FIG. 1D, a plurality of reinforcing portions 5a penetrating the inner resin portion 4 and connected to the outer resin portion 5 are formed. The two blades 2 include a blade portion 6 having a blade edge 6 a and a support portion 7 attached to the inner resin portion 4 at the distal end portions 3 b of the both grip portions 3. The blade portions 6 of the two blades 2 overlap each other outside the distal end portions 3b of the both grip portions 3, and the cutting edges 6a of the both blade portions 6 face each other. An elastic portion 8 is formed between the inner resin portions 4 of the grip portions 3 near the base ends 3a of the grip portions 3. A guide 9 is formed between the inner resin portions 4 of the grips 3 near the distal ends 3b of the grips 3. The two blades 2 are opened together with the two gripping portions 3 by the elastic force of the elastic portion 8 within the range of the guide portion 9, and are closed together with the two gripping portions 3 against the elastic force of the elastic portion 8.
[0036]
The inner resin portion 4 attached to the blade body 2 and the outer resin portions 5 attached to both outer sides in the opening and closing direction X of the inner resin portion 4 have different properties from each other and are made of polyacetal. The surface hardness of the inner resin portion 4 is set to be larger than the surface hardness of the outer resin portion 5 made of an olefin-based thermoplastic elastomer.
[0037]
Next, the improvement of the outer shape of the grip portions 3 will be described in detail for the following cases *.
* When viewed from the plane P including the opening / closing direction X of both gripping parts 3
On the surface of the outer resin portion 5 of both grip portions 3, grip surfaces 10 in the width direction Y orthogonal to a plane P including the open / close direction X are formed on both outer sides in the open / close direction X. This gripping surface 10 includes a proximal gripping surface 11 extending from a proximal end 3 a of both gripping portions 3, a distal gripping surface 12 extending from a distal end 3 b of both gripping portions 3, and a proximal gripping surface 11. An intermediate gripping surface 13 extending between the distal gripping surface 12 is defined. The outer shape of the gripping surface 10 refers to a shape formed by an extension of the gripping surface 10 as viewed from a surface P including the opening / closing direction X of the gripping portions 3. The concave and convex portions 10a may be formed, the cross section of the grip surface 10 may be formed flat, or may be formed in a convex or concave shape.
[0038]
The grip surfaces 10 of the grip portions 3 have the following characteristics (see also FIGS. 3 and 4).
A supposed plane connecting a proximal boundary 14 between the proximal grip surface 11 and the intermediate grip 13 and a distal boundary 15 between the distal grip 12 and the intermediate grip 13. This intermediate gripping surface 13 is recessed from A. The distance LA between the assumed planes A of the two gripping portions 3 is always between the base end side boundary portion 14 of the two gripping portions 3 and the distal side of the both gripping portions 3 irrespective of the open state and the closed state of the two gripping portions 3. The distance between the borders 15 gradually increases.
[0039]
The distal-side grip surface 12 is recessed from an assumed plane B connecting the distal-side boundary portion 15 and the distal end portion 3b of the grip portion 3. It is to be noted that the depression in the distal-side grip surface 12 is not necessarily required, and the distal-side grip surface 12 may be formed on the assumed plane B to have a flat shape.
[0040]
The distance LB between the assumed planes B of the two gripping portions 3 is always from the boundary 15 between the distal ends of the two gripping portions 3 regardless of the open state and the closed state of the two gripping portions 3. As it reaches between 3b, it becomes smaller gradually. The distance in the opening / closing direction X (the distance L15 between the assumed planes B of the two gripping parts 3) between the ends of the front end side boundary parts 15 of the two gripping parts 3 is the distance between the ends of the distal end parts 3b of the two gripping parts 3. Is always set to be larger than the interval in the opening and closing direction X (the interval L3b between the assumed planes B of the gripping portions 3) regardless of the open state and the closed state of the gripping portions 3. The distance LB between the assumed planes B of the two gripping parts 3 is set such that the assumed planes B of the two gripping parts 3 are parallel to each other when the two gripping parts 3 are open, and It may be the same from between to the end portions 3b of both grip portions 3.
[0041]
The distance in the opening and closing direction X (the distance between the assumed planes B of the two grip portions 3) between the ends of the front end side boundary portions 15 of the both grip portions 3 is L15 as described above. The distance in the opening and closing direction X (the distance between the assumed planes A of the two gripping parts 3) between the ends of the base end side boundary parts 14 of the two gripping parts 3 is L14. The distance between the intermediate gripping surfaces 13 of the gripping portions 3 in the opening and closing direction X (the distance between the assumed planes A of the gripping portions 3) is L13. An interval in the opening and closing direction X (an interval between the assumed planes B of the two gripping portions 3) between the tip side gripping surfaces 12 of the two gripping portions 3 is defined as L12. The distance in the opening and closing direction X (the distance between the assumed planes B of the two grip portions 3) between the ends of the distal end portions 3b of the two grip portions 3 is defined as L3b. The distance L15 is always set to be larger than the distances L14, L13, L12, and L3b regardless of the open state and the closed state of the two grip portions 3.
[0042]
The maximum distance L11 in the opening / closing direction X between the base-side gripping surfaces 11 of the two gripping parts 3 is defined as the distance in the opening / closing direction X between the ends of the base-side boundary parts 14 of the two gripping parts 3 (the two gripping parts 3). 3, the base-side gripping surface 11 is inflated by setting it to be always larger than the distance L14) between the assumed planes A regardless of the open state and the closed state of the two gripping parts 3. In addition, as shown by the two-dot chain line, in the open state of both grip portions 3, these distances L11 and L14 may be set to be equal to each other to make the proximal grip surface 11 flat. Further, the maximum distance L11 is always set to be larger than the maximum distance L3a in the opening and closing direction X between the ends of the base ends 3a of the two gripping parts 3 irrespective of the open state and the closed state of the two gripping parts 3. The base-side gripping surface 11 is inflated.
[0043]
-Let C be an assumed parallel plane passing through both ends in the opening and closing direction X at the front end side boundary portion 15 of both gripping portions 3. The base end side boundary part 14 of both grip parts 3, the intermediate grip surface 13 of both grip parts 3, the distal grip surface 12 of both grip parts 3, the tip part 3b of both grip parts 3, both grip parts 3 is always located between the assumed planes C irrespective of the open state and the closed state of both grip portions 3.
[0044]
* When viewed from the side Q including the width direction Y orthogonal to the opening / closing direction X of both gripping parts 3
On the surface of the outer resin portion 5 of both grip portions 3, side surfaces 16 in the opening and closing direction X are formed on both outer sides in the width direction Y. The side surface 16 includes a proximal side surface 17 sandwiching the proximal grip surface 11, a distal side surface 18 sandwiching the distal grip surface 12, and a region between the proximal side surface 17 and the distal side surface 18. An intermediate side surface 19 sandwiching the intermediate gripping surface 13 is defined. The outer shape of the side surface 16 means a shape formed by an extension of the side surface 16 extending from the surface Q including the width direction Y orthogonal to the opening / closing direction X of both gripping portions 3. May be formed, or the cross section of the side surface 16 may be formed flat, or may be formed in a convex or concave shape.
[0045]
The side surfaces 16 of the grip portions 3 have the following characteristics (see also FIG. 5).
The intermediate side surface 19 and the distal side surface 18 are located more than an assumed plane D connecting the proximal side boundary portion 14 between the proximal side surface 17 and the intermediate side surface 19 and the distal end portion 3b of the grip portion 3. It is dented.
[0046]
The width dimension W12 in the width direction Y of the distal-side gripping surface 12 is set to be equal to the width dimension W15 of the distal-side boundary portion 15 in the width direction Y. As shown by the two-dot chain line, the width W12 may be set to be larger than the width W15 to expand the distal side surface 18 or may be set to be smaller and the distal side surface 18 may be recessed. . When the distal side surface 18 is inflated, the intermediate side surface 19 and the distal side surface 18 are depressed more than an assumed plane D connecting the apex 18 a on the distal side surface 18 and the proximal boundary 14.
[0047]
The width dimension W13 in the width direction Y on the intermediate gripping surface 13 and the width dimension W15 in the width direction Y on the distal-side boundary section 15 are larger than the width dimension W14 in the width direction Y at the base-side boundary section 14. It is set small. The width W13 in the width direction Y of the intermediate gripping surface 13 is set to be larger than the width W15 in the width direction Y of the front end-side boundary portion 15, so that the intermediate gripping surface 13 is expanded. As indicated by the two-dot chain line, the width W13 may be set smaller than the width W15 so that the intermediate gripping surface 13 is depressed, or the width W13 may be set equal to the width W15. Good.
[0048]
The maximum width dimension W11 in the width direction Y of the base-side grip surface 11 is determined by the width dimension W14 of the base-side boundary portion 14 in the width direction Y and the width direction Y of the base portions 3a of the grip portions 3 in the width direction Y. The base-side gripping surface 11 is set to be larger than the width dimension W3a so as to expand. As shown by the two-dot chain line, the width W11 may be set to be equal to the width W14.
[0049]
The intermediate side surface 19, the front end side boundary portion 15, the front end side surface 18, and the front end portions 3b of both grip portions 3 are parallel to each other and pass through both ends of the base end side boundary portion 14 in the width direction Y. It is located between various assumed planes E.
[0050]
The base-side boundary portion 14, the intermediate side surface 19, the front-side boundary portion 15, the front-side side surface 18, and the front-end portions 3b of the grip portions 3 are each in the width direction Y in the base-side side surface 17. Are located between the assumed planes F which are parallel to each other and pass through both apex portions 17a.
[0051]
Next, an example of how to use the grip scissors will be described.
As shown in FIG. 6, both grips 3 of grip handle 1 are wrapped in palm 20, and the abdomen of thumb 21 from the fingertip to the first joint is applied to upper distal gripping surface 12 while index finger The abdomen between the fingertip and the first joint at 22 is applied to the lower distal-side grip surface 12. With the distal ends of the grips 3 held between the thumb 21 and the index finger 22 in this manner, the abdomen of the middle finger 23 between the first joint and the second joint is the lower intermediate gripping surface 13. At the same time, the abdomen of the middle finger 23 from the fingertip to the first joint faces the palm 20 and is turned from the intermediate gripping surface 13 to the intermediate side surface 19. The abdominal side of the ring finger 24 and the abdominal side of the little finger 25 face the palm 20 and wrap around from the proximal gripping surface 11 to the proximal side surface 17. When a force is applied to the thumb 21 and the forefinger 22 in such a gripping state, the blades 2 can be closed together with the grips 3. When the thumb 21 and the forefinger 22 are released, the blades 2 can be opened together with the grips 3.
[Brief description of the drawings]
FIG. 1A is a diagram showing an open state when the grip scissors according to the present embodiment is viewed from the side including the opening and closing directions of both grip portions, and FIG. 1B is a diagram showing the grip scissors with both grip portions. It is a figure which shows an open state when it sees from the surface side containing the width direction orthogonal to opening-and-closing direction of (a), (c) is a figure which shows the base end part of a grip handle in this grip scissors, (d) is ( It is a ZZ line sectional view of a).
FIG. 2A is a view showing the closed state when the grip scissors are viewed from the side including the opening and closing directions of both grip portions, and FIG. 2B is a perspective view of the grip scissors.
FIG. 3 is a view for explaining the outer shape of both grip handles shown in FIG. 1 (a).
FIG. 4 is a view for explaining the outer shape of both grip handles shown in FIG. 2 (a).
FIG. 5 is a view for explaining the outer shape of both grip handles shown in FIG. 1 (b).
6A is a diagram illustrating an example of a state in which the grip shown in FIG. 1A is gripped, and FIG. 6B is an example of a state in which the grip shown in FIG. 1B is gripped; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... grip handle, 2 ... blade body, 3 ... grip part, 3a ... base end part, 3b ... tip part, 4 ... inner resin part, 5 ... outer resin part, 10 ... grip surface, 11 ... base end grip surface , 12: distal gripping surface, 13: intermediate gripping surface, 14: proximal boundary, 15: distal boundary, 16: side, 17: proximal side, 18: distal side, 18a: top, 19: intermediate side surface, A, B, D: assumed plane, P: surface, X: opening and closing direction, Y: width direction, L11, L12, L13, L14, L15, L3a, L3b: interval, W11, W12, W13, W14, W15, W3a ... width dimensions.

Claims

A grip handle having both grips extending from the base end, and a blade body extending from the distal end of the two grips, and the elasticity of the grips allows the blades to move together with the grips. In grip scissors which open and close both blades together with both grips against the elastic force of both grips,
A grip surface in the width direction orthogonal to a surface including the opening / closing direction on both sides in the opening / closing direction of both grip portions of the grip handle, a proximal grip surface extending from a base end portion of both grip portions, and both grip portions. When divided into a distal gripping surface extending from the distal end of the base and an intermediate gripping surface extending between the proximal gripping surface and the distal gripping surface, the base between the proximal gripping surface and the intermediate gripping surface is divided. End side boundary portion, than the assumed plane connecting the distal side boundary portion between the distal side gripping surface and the intermediate gripping surface, the intermediate gripping surface is depressed,
The distance in the opening and closing direction between the boundary portions on the distal side of both grip portions is the distance in the opening and closing direction between the proximal boundary portions of both grip portions, the distance in the opening and closing direction between the intermediate gripping surfaces of both grip portions, and the distance between both grip portions. The gap in the opening and closing direction between the gripping surfaces on the distal end side of the part and the gap in the opening and closing direction between the tip parts of both gripping parts are always set to be larger regardless of the open state and the closed state of both gripping parts. Characteristic grip scissors.

A grip handle having both grips extending from the base end, and a blade body extending from the distal end of the two grips, and the elasticity of the grips allows the blades to move together with the grips. In grip scissors which open and close both blades together with both grips against the elastic force of both grips,
A grip surface in the width direction orthogonal to a surface including the opening / closing direction on both sides in the opening / closing direction of both grip portions of the grip handle, a proximal grip surface extending from a base end portion of both grip portions, and both grip portions. When divided into a distal gripping surface extending from the distal end of the base and an intermediate gripping surface extending between the proximal gripping surface and the distal gripping surface, the base between the proximal gripping surface and the intermediate gripping surface is divided. End side boundary portion, than the assumed plane connecting the distal side boundary portion between the distal side gripping surface and the intermediate gripping surface, the intermediate gripping surface is depressed,
A grip scissors characterized in that the grip surface on the distal side is recessed from an assumed plane connecting the boundary portion on the distal side and the distal ends of both grip portions.

A grip handle having both grips extending from the base end, and a blade body extending from the distal end of the two grips, and the elasticity of the grips allows the blades to move together with the grips. In grip scissors which open and close both blades together with both grips against the elastic force of both grips,
A grip surface in the width direction orthogonal to a surface including the opening / closing direction on both sides in the opening / closing direction of both grip portions of the grip handle, a proximal grip surface extending from a base end portion of both grip portions, and both grip portions. When divided into a distal gripping surface extending from the distal end of the base and an intermediate gripping surface extending between the proximal gripping surface and the distal gripping surface, the base between the proximal gripping surface and the intermediate gripping surface is divided. End side boundary portion, than the assumed plane connecting the distal side boundary portion between the distal side gripping surface and the intermediate gripping surface, the intermediate gripping surface is depressed,
The side in the opening and closing direction on both sides in the width direction of both grip portions of the grip handle, the proximal side surface sandwiching the proximal grip surface, the intermediate side surface sandwiching the intermediate grip surface, and the distal grip surface. When partitioned into the sandwiched distal side surface, the intermediate side surface is larger than the assumed plane connecting the proximal side boundary portion between the proximal side surface and the intermediate side surface and the distal end portion of the grip portion or the top on the distal side surface. And gripping scissors characterized in that the tip side surface is depressed.

The gap in the opening and closing direction between the boundary portions on the tip side of the two gripping portions is always set to be larger than the gap in the opening and closing direction between the tip portions of the two gripping portions, regardless of the open state and the closed state of both gripping portions. The grip scissors according to claim 2, wherein the grip scissors are provided.

The maximum gap in the opening and closing direction between the base side gripping surfaces of the two gripping parts, the gap in the opening and closing direction between the base side boundary parts of both gripping parts, and the gap in the opening and closing direction between the base ends of both gripping parts. In comparison, regardless of the open state and the closed state of the two grip portions, the grip portion is always set to a large value so as to expand the proximal grip surface, or to be set equal. Item 4. The grip scissors according to Item 4.

The width dimension in the width direction in the intermediate gripping surface and the width dimension in the width direction in the distal boundary portion are set smaller than the width dimension in the width direction at the proximal end boundary portion, and the width of the intermediate gripping surface is reduced. Compare the width dimension in the width direction to the width dimension in the width direction at the front end side boundary, set it to be larger to make the middle side larger, or set it smaller to make the middle side concave or equal. ,
The width dimension in the width direction of the distal-side gripping surface is compared with the width dimension in the width direction of the distal-side boundary portion, and is set to be equal, or is set to be larger and the distal-side surface is expanded or set smaller. The grip scissors according to claim 3, wherein the tip side surface is recessed.

The width dimension in the width direction of the base side gripping surface, the width dimension in the width direction at the base side boundary portion, compared to the width dimension in the width direction at the base end portion of both gripping portions, set to be large. The grip scissors according to claim 3 or 6, wherein the base side surface is inflated or set to be equal.

Both grip portions of the grip handle include an inner resin portion attached to the blade body, and outer resin portions attached to both outer sides of the inner resin portion in the opening / closing direction. The resin portions are integrally continuous with each other at the base end portions of both grip portions, and the inner resin portions of the both grip portions are continuously and integrally formed with each other at the base end portions of both grip portions, and are exposed inside the outer resin portion. The grip surface and side surfaces of the grip portions are provided on the surface of the outer resin portion, and the surface hardness of the outer resin portion is set to be smaller than the surface hardness of the inner resin portion. The grip scissors according to any one of claims 1 to 7.