JP2005000303A

JP2005000303A - Swing type razor

Info

Publication number: JP2005000303A
Application number: JP2003165235A
Authority: JP
Inventors: Masayasu Yamamoto; 将靖山本
Original assignee: Kaijirushi Hamono Center KK
Current assignee: Kaijirushi Hamono Center KK
Priority date: 2003-06-10
Filing date: 2003-06-10
Publication date: 2005-01-06
Anticipated expiration: 2023-06-10
Also published as: JP4443862B2

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate shaving by setting an angle formed by the shaving tangential face of a razor head 1 with the reciprocating direction X to be large so as to easily set the direction of the shaving tangential face to face up in a primary state. <P>SOLUTION: This swing type razor is provided with: a razor head 1 having a blade body; and a holder supporting the razor head 1 in the state of being swingable in a vertical direction Z. The swing type razor is provided with the pusher 11 coming into pressure contact with the head 1 accompanying swinging. Upper side supporting parts 28 and 33 and lower side supporting parts 29 and 34 where the head 1 and the pusher 11 can abut on each other depending on the initial state P where the head 1 stands still supported by the pusher 11 and a swinging state where the head 1 is turned in the vertical direction Z from the initial state P are provided separated from each other in the vertical direction Z. When setting a distance from the upper side supporting part 28 of the pusher 11 to a reference surface assumed on the front surface of a holder head where the pusher 11 projects to be A and setting a distance from the lower side supporting part 29 of the pusher 11 to the reference surface to be B, A<B is set. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ホルダに対し剃刀ヘッドを首振り可能に支持する首振り式剃刀において、この剃刀ヘッドをその首振りに伴い圧接するプッシャの形状の改良に関するものである。
【０００２】
【従来の技術】
下記特許文献１においては、その図面に示すように、プッシャ６の圧接部２７が剃刀ヘッド１の受圧部１１を圧接するとともに、プッシャ６の両腕部２６が剃刀ヘッド１の受圧部１１の両側を挟む。
【０００３】
下記特許文献２においては、その図面に示すように、両板ばね部９の圧接部９ａが刃体組付けヘッド２の受圧部１０を圧接する。
【０００４】
【特許文献１】
特開２００３―９３７６７号公報
【特許文献２】
特許３０１４３２０号公報
【０００５】
【発明が解決しようとする課題】
一般に、プッシャの延設方向（特許文献１のプッシャ６の往復動方向Ｘ、特許文献２の両板ばね部９の軸線方向）がホルダ（特許文献１のホルダ２、特許文献２のホルダ１）の延設方向に対し交差する角度は、鈍角である方がひげ剃り時にホルダを把持した指が顔面に接触しにくくなるため使い易い。さらに、剃刀ヘッド（特許文献１の剃刀ヘッド１、特許文献２の刃体組付けヘッド２）を顔面に当てがった場合、剃刀ヘッドの表側で刃体（特許文献１の刃体９、特許文献２の刃体組付けヘッド２の刃体）の刃先を通るひげ剃り接線面の向きは、少し上向きの方が刃先を使用者が上方から見易くなるため使い易い。
【０００６】
しかし、上記の特許文献１ではひげ剃り接線面の向きが中立状態で下向きになっている。また、上記の特許文献２ではひげ剃り接線面の向きが明確ではないが同様である。それは下記のようにプッシャの形態が原因であると考えられる。
【０００７】
上記の特許文献１ではプッシャ６の圧接部２７の上下両支点部２７ｂを結ぶ想定平面が中立状態でプッシャ６の往復動方向Ｘに対し直交し、また、上記特許文献２では両板ばね部９の圧接部９ａにある上下両支持部を結ぶ想定平面が中立状態で両板ばね部９の軸線に対し下向きに傾斜している。それらの想定平面に合わせて剃刀ヘッドの裏側（特許文献１の受圧部１１、特許文献２の受圧部１０）の形状を決めるとともに、ひげ剃り接線面の向きを少し上向きにするには、刃体の厚み方向をプッシャの延設方向に対しかなり上向きに傾斜させねばならない。ところが、剃刀ヘッドの刃先側で剃刀ヘッドの表側と裏側との間の厚みを大きくする必要があり、剃刀ヘッドを薄くする場合に好ましくない問題が生じる。ちなみに、ホルダを顔面に接近させれば、ひげ剃り接線面の向きを少し上向きにすることはできるが、ひげ剃り時にホルダを把持した指が顔面に接触し易くなって使いにくくなる。
【０００８】
この発明は、従来のものと比較して、剃刀ヘッドのひげ剃り接線面の向きを上向きにし易いように形状を改良したプッシャを提供することを目的としている。ここに、「上向きにし易い」とは、剃刀ヘッドのひげ剃り接線面が実際に上方を向いていることを意味せず、本発明の首振り式剃刀と、プッシャを除いて同一条件で設定された従来の首振り式剃刀とを互いに比較した場合、ひげ剃り接線面を上方へ向かせ易いことを意味する。
【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１〜４に示す第１実施形態、図５に示す第２実施形態、図６に示す第１，２実施形態の別例１、図７に示す第１，２実施形態の別例２）の符号を援用して本発明を説明する。
【００１０】
＊請求項１〜３の発明
請求項１の発明（第１，２実施形態及びその別例１，２に対応）にかかる首振り式剃刀は、下記のように構成されている。
【００１１】
この首振り式剃刀においては、刃体（３）を有する剃刀ヘッド（１）と、この剃刀ヘッド（１）を上下方向（Ｚ）へ首振り可能に支持するホルダ（２）とを備え、この剃刀ヘッド（１）をその首振りに伴い圧接するプッシャ（１１）を設けている。前記剃刀ヘッド（１）が前記プッシャ（１１）に支えられて静止する初期状態（Ｐ）と、この初期状態（Ｐ）から剃刀ヘッド（１）を上下方向Ｚ（上向きのみまたは下向きのみまたは上下両向き）へ回動させた首振り状態（Ｑ，Ｒ）とで、剃刀ヘッド（１）とプッシャ（１１）とが互いに当接し得る上側支持部（２８，３３）と下側支持部（２９，３４）とを上下方向（Ｚ）へ互いに離間して設けている。前記プッシャ（１１）が突出するホルダヘッド（７）の前面（１３ａ）に想定した基準面Ｗ（前面１３ａの主体部分を通る想定平面であって後記プッシャ１１の往復動方向Ｘや後記プッシャ１１としての片持ち梁状ばね３６の軸線３６ａに対し直交する想定平面）に対し前記プッシャ（１１）の上側支持部（２８）がなす距離をＡとし、この基準面（Ｗ）に対し前記プッシャ（１１）の下側支持部（２９）がなす距離をＢとした場合、前記初期状態（Ｐ）と首振り状態（Ｑ，Ｒ）とのうち少なくとも初期状態（Ｐ）で、Ａ＜Ｂに設定している。
【００１２】
請求項２の発明（第１実施形態及びその別例１，２に対応）にかかる首振り式剃刀は、下記のように構成されている。
この首振り式剃刀においては、刃体（３）を有する剃刀ヘッド（１）と、この剃刀ヘッド（１）を上下方向（Ｚ）へ首振り可能に支持するホルダ（２）とを備え、この剃刀ヘッド（１）をその首振りに伴い圧接するように弾性体（１２）により付勢されて往復動し得るプッシャ（１１）を設けている。前記剃刀ヘッド（１）が前記プッシャ（１１）に支えられて静止する初期状態（Ｐ）と、この初期状態（Ｐ）から剃刀ヘッド（１）を上下方向（Ｚ）へ回動させた首振り状態（Ｑ，Ｒ）とで、剃刀ヘッド（１）とプッシャ（１１）とが互いに当接し得る上側支持部（２８，３３）と下側支持部（２９，３４）とを上下方向（Ｚ）へ互いに離間して設けている。前記プッシャ（１１）で上側支持部（２８）と下側支持部（２９）とを結ぶ想定平面（Ｍ）は、前記初期状態（Ｐ）と首振り状態（Ｑ，Ｒ）とのうち少なくとも初期状態（Ｐ）で、上方から下方に向うに従い、前記プッシャ（１１）が突出するホルダヘッド（７）の前面（１３ａ）に想定した基準面（Ｗ）に対し離間するように、前記プッシャ（１１）の往復動方向（Ｘ）に対し傾斜している。
【００１３】
請求項３の発明（第２実施形態及びその別例１，２に対応）にかかる首振り式剃刀は、下記のように構成されている。
この首振り式剃刀においては、刃体（３）を有する剃刀ヘッド（１）と、この剃刀ヘッド（１）を上下方向（Ｚ）へ首振り可能に支持するホルダ（２）とを備え、この剃刀ヘッド（１）をその首振りに伴い圧接するように付勢するプッシャ（１１）として、ホルダヘッド（７）から突出する片持ち梁状ばね（３６）を設けている。前記剃刀ヘッド（１）が前記プッシャ（１１）に支えられて静止する初期状態（Ｐ）と、この初期状態（Ｐ）から剃刀ヘッド（１）を上下方向（Ｚ）へ回動させた首振り状態（Ｑ，Ｒ）とで、剃刀ヘッド（１）とプッシャ（１１）とが互いに当接し得る上側支持部（２８，３３）と下側支持部（２９，３４）とをプッシャ（１１）としての前記片持ち梁状ばね（３６）の自由端部で上下方向（Ｚ）へ互いに離間して設けている。前記プッシャ（１１）で上側支持部（２８）と下側支持部（２９）とを結ぶ想定平面（Ｍ）は、前記初期状態（Ｐ）と首振り状態（Ｑ，Ｒ）とのうち少なくとも初期状態（Ｐ）で、上方から下方に向うに従い、前記プッシャ（１１）としての片持ち梁状ばね（３６）が突出するホルダヘッド（７）の前面（１３ａ）に想定した基準面（Ｗ）に対し離間するように、前記片持ち梁状ばね（３６）の軸線（３６ａ）に対し傾斜している。
【００１４】
請求項１〜３の発明では、プッシャ（１１）で上側支持部（２８）と下側支持部（２９）とを結ぶ想定平面（Ｍ）が上向き形状になっているため、剃刀ヘッド（１）で上側支持部（３３）と下側支持部（３４）とを結ぶ想定平面（Ｎ）も、初期状態（Ｐ）でこのプッシャ（１１）の想定平面（Ｍ）に合わせて上向き形状にすることができる。そのため、剃刀ヘッド（１）の厚みを大きくすることなく刃体（３）の厚み方向もこの剃刀ヘッド（１）の想定平面（Ｎ）に合わせて上向きにし易くなる。従って、剃刀ヘッド（１）のひげ剃り接線面（Ｈ）がプッシャ（１１）の往復動方向（Ｘ）や片持ち梁状ばね（３６）の軸線（３６ａ）に対しなす角度（α）を大きく設定してそのひげ剃り接線面（Ｈ）の向きが初期状態（Ｐ）で上向きに設定し易くなり、ひげ剃りが行い易くなる。
【００１５】
＊請求項４の発明（第１，２実施形態及びその別例１，２に対応）
請求項１または請求項２または請求項３の発明を前提とする請求項４の発明において、前記ホルダ（２）に対する剃刀ヘッド（１）の首振り回動中心線（Ｃ）は、前記プッシャ（１１）の上側支持部（２８）と下側支持部（２９）との間に位置している。すなわち、プッシャ（１１）の往復動方向（Ｘ）に平行、または、プッシャ（１１）としての片持ち梁状ばね（３６）の軸線（３６ａ）に平行な想定直線（ＳＵ，ＳＤ）であって、上側支持部（２８）を通る上側想定直線（ＳＵ）と、下側支持部（２９）を通る下側想定直線（ＳＤ）との間の想定範囲（Ｓ）内に前記首振り回動中心線（Ｃ）が位置することを意味する。
【００１６】
請求項４の発明では、プッシャ（１１）の上側支持部（２８）及び下側支持部（２９）が共に剃刀ヘッド（１）の首振り回動中心線（Ｃ）に対し近い位置に設定することができ、初期状態（Ｐ）及び首振り状態（Ｑ，Ｒ）で剃刀ヘッド（１）を安定させることができる。
【００１７】
＊請求項５の発明（第１，２実施形態及びその別例１，２に対応）
請求項１から請求項４のうちいずれかの請求項の発明を前提とする請求項５の発明は、下記のように構成されている。
【００１８】
前記プッシャ（１１）は前記剃刀ヘッド（１）の刃体（３）の刃先（４）の延設方向（Ｙ）に沿った両側に配設されている。この両プッシャ（１１）間には一方のプッシャ（１１）の上側支持部（２８）及び下側支持部（２９）と他方のプッシャ（１１）の上側支持部（２８）及び下側支持部（２９）との間の開口部（２４）で上下方向（Ｚ）へ開放された凹部（２３）を形成している。前記剃刀ヘッド（１）に形成した凸部（３２）をこの開口部（２４）から凹部（２３）に嵌め込んで両プッシャ（１１）間で挟持している。
【００１９】
請求項５の発明では、両プッシャ（１１）により剃刀ヘッド（１）の両側を支えているので、剃刀ヘッド（１）を安定させることができる。また、前記両プッシャ（１１）間の凹部（２３）と剃刀ヘッド（１）の凸部（３２）との係合により、プッシャ（１１）に対する剃刀ヘッド（１）の横振れを防止して剃刀ヘッド（１）を安定させることができる。
【００２０】
＊請求項６の発明（第１，２実施形態及びその別例１，２に対応）
請求項５の発明を前提とする請求項６の発明において、前記両プッシャ（１１）間の凹部（２３）の開口部（２４）において一方のプッシャ（１１）の上側支持部（２８）及び下側支持部（２９）と他方のプッシャ（１１）の上側支持部（２８）及び下側支持部（２９）とを結ぶ方向（Ｙ）の間隔（２５ａ）は、ホルダヘッド（７）の前面（１３ａ）から離れる方向（Ｘ）へ向うほど大きくなっている。
【００２１】
請求項６の発明では、前記両プッシャ（１１）間の凹部（２３）に対し剃刀ヘッド（１）の凸部（３２）を嵌め込み易い。
＊請求項７の発明（第１，２実施形態の別例２に対応）
請求項１から請求項４のうちいずれかの請求項の発明を前提とする請求項７の発明において、前記剃刀ヘッド（１）には前記プッシャ（１１）が嵌め込まれる凹部（３７）を形成し、刃体（３）の刃先（４）の延設方向（Ｙ）に沿った両側でこの凹部（３７）に設けた両側部（３７ａ）間でこのプッシャ（１１）を挟持している。
【００２２】
請求項７の発明では、剃刀ヘッド（１）の凹部（３７）に対するプッシャ（１１）の係合により、プッシャ（１１）に対する剃刀ヘッド（１）の横振れを防止して剃刀ヘッド（１）を安定させることができる。
【００２３】
＊請求項８の発明（第１，２実施形態及びその別例１，２に対応）
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する請求項８の発明は、下記のように構成されている。
【００２４】
前記プッシャ（１１）は、ホルダヘッド（７）の前面（１３ａ）から突出する腕部（１６）と、この腕部（１６）の先端部に設けた受け部（１７）とを有している。この受け部（１７）は、腕部（１６）の先端部で上方へ突設されてこの腕部（１６）の先端部との間で段差部（２１）を形成した上側押圧部（１９）と、腕部（１６）の先端部で下方へ突設されてこの腕部（１６）の先端部との間で段差部（２２）を形成した下側押圧部（２０）とを有している。前記上側支持部（２８）はこの上側押圧部（１９）に形成されている。前記下側支持部（２９）はこの下側押圧部（２０）に形成されている。
【００２５】
請求項８の発明では、プッシャ（１１）をコンパクトにするために腕部（１６）を細くしても、受け部（１７）で上側押圧部（２８）と下側支持部（２９）の間隔（Ｌ）を大きく設定して初期状態（Ｐ）で剃刀ヘッド（１）を安定させることができる。
【００２６】
＊請求項９の発明（第１，２実施形態及びその別例１，２に対応）
請求項８の発明を前提とする請求項９の発明は下記のように構成されている。
前記受け部（１７）の上側押圧部（１９）の形態と前記受け部（１７）の下側押圧部（２０）の形態とが互いに異なる。例えば、基準面（Ｗ）に対し上側押圧部（１９）の段差部（２１）がなす距離（２１ａ）と、基準面（Ｗ）に対し下側押圧部（２０）の段差部（２２）がなす距離（２２ａ）とが互いに等しく、また、上側押圧部（１９）の段差部（２１）と下側押圧部（２０）の段差部（２２）とを結ぶ想定平面（Ｅ）に対し上側押圧部（１９）の上側支持部（２８）がなす距離（２８ａ）よりも、この想定平面（Ｅ）に対し下側押圧部（２０）の下側支持部（２９）がなす距離（２９ａ）を大きくしている。
【００２７】
請求項９の発明では、プッシャ（１１）において上側押圧部（１９）と下側押圧部（２０）とを区別し易くなり、ホルダヘッド（７）に対するプッシャ（１１）の組み付け向きが分かり易くなるとともに、プッシャ（１１）に対する剃刀ヘッド（１）の支持を行い易い。
【００２８】
＊請求項１０〜１１の発明
請求項１から請求項９のうちいずれかの請求項の発明を前提とする請求項１０の発明は、第１，２実施形態及びその別例１，２に対応し、下記のように構成されている。
【００２９】
前記プッシャ（１１）において上側支持部（２８）と下側支持部（２９）とを結ぶ想定平面（Ｍ）上に受け面（３０）を形成するとともに、前記剃刀ヘッド（１）において上側支持部（３３）と下側支持部（３４）とを結ぶ想定平面（Ｎ）上に受け面（３５）を形成している。このプッシャ（１１）の受け面（３０）とこの剃刀ヘッド（１）の受け面（３５）とを前記初期状態（Ｐ）で互いに面接触可能に相対向させている。例えば、請求項１０の発明を前提とする請求項１１の発明においては、前記初期状態（Ｐ）で前記プッシャ（１１）の受け面（３０）と剃刀ヘッド（１）の受け面（３５）とが互いに面接触し得る面積は、１〜２０ｍｍ^２である。
【００３０】
請求項１０〜１１の発明では、両受け面（３０，３５）の面接触により、初期状態（Ｐ）で剃刀ヘッド（１）を安定させることができる。
＊請求項１２の発明（第１，２実施形態及びその別例１，２に対応）
請求項１０または請求項１１の発明を前提とする請求項１２の発明においては、前記初期状態（Ｐ）で前記プッシャ（１１）の受け面（３０）と剃刀ヘッド（１）の受け面（３５）とが互いに面接触し得る面積よりも、前記首振り状態（Ｑ，Ｒ）で前記プッシャ（１１）の受け面（３０）と剃刀ヘッド（１）の受け面（３５）とが互いに面接触し得る面積が減少する。
【００３１】
請求項１２の発明では、剃刀ヘッド（１）の初期状態（Ｐ）よりも首振り状態（Ｑ，Ｒ）で両受け面（３０，３５）間の接触面積が減少するので、首振り時に両受け面（３０，３５）間の摩擦抵抗が減少し、円滑な首振り動作を行うことができる。
【００３２】
＊請求項１３の発明（第１，２実施形態及びその別例１，２に対応）
請求項１から請求項１２のうちいずれかの請求項の発明を前提とする請求項１３の発明において、プッシャ（１１）の上側支持部（２８）と下側支持部（２９）とのうち少なくとも一方のものは、丸みを持たせた角部（２６，２７）に形成されている。
【００３３】
請求項１３の発明では、首振り動作時、ホルダヘッド（７）に対する剃刀ヘッド（１）の回動が滑らかになる。
＊請求項１４の発明（第１，２実施形態の別例１に対応）
請求項１から請求項９のうちいずれかの請求項の発明を前提とする請求項１４の発明は、下記のように構成されている。
【００３４】
前記プッシャ（１１）において上側支持部（２８）と下側支持部（２９）とを結ぶ受け面（３０）を形成するとともに、前記剃刀ヘッド（１）において上側支持部（３３）と下側支持部（３４）とを結ぶ受け面（３５）を形成している。このプッシャ（１１）の受け面（３０）とこの剃刀ヘッド（１）の受け面（３５）との間には前記初期状態（Ｐ）で上側支持部（２８，３３）と下側支持部（２９，３４）との間にわたり間隙（Ｇ）を生じる。
【００３５】
請求項１４の発明では、上側支持部（２８，３３）と下側支持部（２９，３４）とによる二箇所の支持により、初期状態（Ｐ）で剃刀ヘッド（１）を安定させることができる。
【００３６】
＊請求項１５の発明（第１，２実施形態及びその別例１，２に対応）
請求項１から請求項１４のうちいずれかの請求項の発明を前提とする請求項１５の発明において、剃刀ヘッド（１）は、上下方向（Ｚ）のうち上向き及び下向きへそれぞれ前記初期状態（Ｐ）から首振り可能にホルダ（２）に対し支持されている。
【００３７】
請求項１５の発明では、初期状態（Ｐ）から上向き及び下向きへそれぞれ首振り可能な剃刀ヘッド（１）において、請求項１から請求項１４のうちいずれかの請求項の発明の効果を発揮させることができる。
【００３８】
【発明の実施の形態】
〔第１実施形態〕
まず、本発明の第１実施形態にかかる首振り式剃刀について図１〜４を参照して説明する。
【００３９】
＜首振り式剃刀の概要＞
この首振り式剃刀は、図１（ａ）に示すように、剃刀ヘッド１と、この剃刀ヘッド１を上下方向Ｚへ首振り可能に支持するホルダ２とを備えている。
【００４０】
図２に示すように、この剃刀ヘッド１の表側には複数の刃体３が組み込まれている。この刃体３は、左右方向Ｙへ延びる刃先４と、この刃先４の対辺側になる背縁５とを有している。この刃先４が下方へ向き、この背縁５が上方へ向く。この剃刀ヘッド１の表側には各刃体３の刃先４を通るひげ剃り接線面Ｈが設けられている。
【００４１】
前記ホルダ２は、把持部６と、この把持部６の上端部で一体的に設けられたホルダヘッド７とを備えている。このホルダヘッド７には左右両支持アーム８と操作部９と往復動部材１０の左右両プッシャ１１と弾性体１２（圧縮コイルばね）とが組み込まれている。この操作部９はホルダヘッド７に対し前後方向Ｘへ往復移動し得るように支持されている。前記往復動部材１０は操作部９の前側でホルダヘッド７及び操作部９に対し前後方向Ｘへ往復移動し得るように支持されている。前記ホルダ２で把持部６の延設方向６ａが往復動部材１０の往復動方向（前後方向Ｘ）に対しなす角度θは鈍角になっている。前記弾性体１２は前記往復動部材１０と操作部９との間で支持されている。この弾性体１２の付勢力により、往復動部材１０と操作部９とが互いに離間し、往復動部材１０の左右両プッシャ１１がホルダヘッド７の前端部１３から前方へ突出して静止しているとともに、操作部９が後退して静止している。前記左右両支持アーム８は操作部９の左右両側で左右両支軸部１４により回動可能に支持され、この左右両支持アーム８の外端部８ａが左右両プッシャ１１の左右両側でホルダヘッド７の前端部１３から前方へ突出している。
【００４２】
前記操作部９を前進位置にすると、左右両支持アーム８の外端部８ａは互いに開く。この操作部９を後退位置にすると、左右両支持アーム８の外端部８ａは互いに閉じる。前記左右両プッシャ１１を前記剃刀ヘッド１の裏側に圧接した状態で左右両支持アーム８を互いに閉じると、それらの外端部８ａにより剃刀ヘッド１が左右両回動支持部１５で回動可能に支持されて首振り可能になる。左右両支持アーム８を互いに開くと、それらの外端部８ａから左右両回動支持部１５が離脱されて剃刀ヘッド１がホルダヘッド７から分離される。
【００４３】
＜前記往復動部材１０の左右両プッシャ１１の詳細＞
この左右両プッシャ１１は、前記往復動部材１０の一部として一体成形され、前記剃刀ヘッド１の各刃体３の刃先４の延設方向（左右方向Ｙ）に沿った両側に配設されている。ちなみに、この往復動部材１０は、ガラス繊維を適宜割合で含有するナイロンにより成形されている。この左右両プッシャ１１は、図１（ｂ）及び図３に示すように、ホルダヘッド７の前端部１３の前面１３ａから突出する腕部１６と、この腕部１６の先端部に形成された受け部１７と、この両腕部１６間に形成された連結部１８とを有している。この受け部１７は、腕部１６の先端部で上方へ突設された上側押圧部１９と、腕部１６の先端部で下方へ突設された下側押圧部２０とを有し、この上側押圧部１９及び下側押圧部２０とこの腕部１６の先端部との間でそれぞれ段差部２１，２２が形成されている。
【００４４】
前記左右両受け部１７と左右両腕部１６と連結部１８との間にはそれらの受け部１７間の開口部２４で上下方向Ｚへ開放された凹部２３が形成されている。この開口部２４で左右両受け部１７には面取り部２５が相対向して形成されている。この左右両面取り部２５は、左右方向Ｙの間隔２５ａが前記ホルダヘッド７の前端部１３の前面１３ａから離れる前方へ向うほど大きくなるように傾斜している。
【００４５】
前記左右両受け部１７の上側押圧部１９の上端部及び下側押圧部２０の下端部にはそれぞれ丸みを持たせた角部２６，２７が形成され、上側角部２６に上側支持部２８が形成されているとともに、下側角部２７に下側支持部２９が形成されている。この上側支持部２８と下側支持部２９とは所定間隔Ｌをあけて上下方向Ｚで互いに離間し、この上側支持部２８と下側支持部２９とを結ぶ想定平面Ｍ上には受け面３０が形成されている。
【００４６】
前記ホルダヘッド７の前端部１３の前面１３ａを通る上下方向Ｚの基準面Ｗを想定した場合、前記左右両プッシャ１１の受け面３０は、上方から下方に向うに従いこの基準面Ｗに対し離間するようにプッシャ１１の往復動方向（前後方向Ｘ）に対し傾斜している。すなわち、この基準面Ｗに対し前記上側支持部２８がなす距離をＡとし、この基準面Ｗに対し前記下側支持部２９がなす距離をＢとした場合、Ａ＜Ｂに設定されている。
【００４７】
前記受け部１７の上側押圧部１９の形態と前記受け部１７の下側押圧部２０の形態とは互いに異なっている。すなわち、前記基準面Ｗに対し上側段差部２１がなす距離２１ａと、基準面Ｗに対し下側段差部２２がなす距離２２ａとは互いに等しいが、上側段差部２１と下側段差部２２とを結ぶ想定平面Ｅに対し上側支持部２８がなす距離２８ａよりも、想定平面Ｅに対し下側支持部２９がなす距離２９ａが大きくなっている。
【００４８】
＜前記剃刀ヘッド１の裏側＞
この裏側に組み込まれた刃台３１には、前記左右両プッシャ１１間の凹部２３に面して凸部３２が形成されているとともに、この凸部３２の左右両側でそれぞれ上側支持部３３と下側支持部３４とが形成されている。この上側支持部３３と下側支持部３４とは所定間隔Ｌをあけて上下方向Ｚで互いに離間し、この上側支持部３３と下側支持部３４とを結ぶ想定平面Ｎ上には受け面３５が形成されている。
【００４９】
＜図２，３に示す前記剃刀ヘッド１の初期状態Ｐ＞
この初期状態Ｐ（中立状態）で、剃刀ヘッド１は、左右両支持アーム８により上下方向Ｚへ回動可能に支持されているとともに、左右両プッシャ１１により圧接されて静止している。この剃刀ヘッド１の凸部３２は、左右両プッシャ１１で開口部２４から凹部２３に嵌め込まれて左右両受け部１７間及び左右両腕部１６間で挟持される。この剃刀ヘッド１の左右両受け面３５はこの左右両プッシャ１１の受け面３０に接触し、これらの受け面３０，３５の上側支持部２８，３３が互いに当接するとともに、これらの受け面３０，３５の下側支持部２９，３４が互いに当接する。そのため、剃刀ヘッド１の左右両受け面３５も、上方から下方に向うに従い前記基準面Ｗに対し離間するようにプッシャ１１の往復動方向（前後方向Ｘ）に対し傾斜し、基準面Ｗに対し前記上側支持部３３がなす距離をＡとし、基準面Ｗに対し前記下側支持部３４がなす距離をＢとした場合、Ａ＜Ｂに設定される。従って、剃刀ヘッド１のひげ剃り接線面Ｈも、これらの左右両受け面３０，３５に合わせて傾斜し、そのひげ剃り接線面Ｈがプッシャ１１の往復動方向（前後方向Ｘ）に対しなす角度αが従来のものと比較して大きくなるように上向きに設定し易くなる。この上側支持部２８，３３及び下側支持部２９，３４を含む両受け面３０，３５は正方形や長方形などの平面ばかりではなく線状に細く延びる面も含み、両受け面３０，３５間での接触面積については１〜２０ｍｍ^２になっている。なお、図示しないが、両受け面３０，３５のうち、一方が凹面であり、他方がこの凹面に面接触する凸面であってもよい。前記ホルダ２に対する剃刀ヘッド１の首振り回動中心線Ｃは、左右両プッシャ１１の上側支持部２８と下側支持部２９との間に位置し、左右両プッシャ１１の往復動方向（前後方向Ｘ）に平行で且つ上側支持部２８を通る上側想定直線ＳＵと下側支持部２９を通る下側想定直線ＳＤと間の想定範囲Ｓ内に位置している。
【００５０】
＜図４（ａ）に示す前記剃刀ヘッド１の上向き首振り状態Ｑ＞
ひげ剃り時に剃刀ヘッド１が押されて首振り回動中心線Ｃを中心に上向きに回動すると、剃刀ヘッド１の左右両受け面３５の上側支持部３３側が左右両プッシャ１１の受け面３０の上側支持部２８側に対し常に接触して支えられながら、これらの受け面３０，３５の下側支持部２９，３４側が互いに離間する。そのため、この上向き首振り状態Ｑでは、前記初期状態Ｐと比較して、これらの受け面３０，３５間での接触面積が減少する。
【００５１】
＜図４（ｂ）に示す前記剃刀ヘッド１の下向き首振り状態Ｒ＞
ひげ剃り時に剃刀ヘッド１が押されて首振り回動中心線Ｃを中心に下向きに回動すると、剃刀ヘッド１の左右両受け面３５の下側支持部３４側が左右両プッシャ１１の受け面３０の下側支持部２９側に対し常に接触して支えられながら、これらの受け面３０，３５の上側支持部２８，３３側が互いに離間する。そのため、この下向き首振り状態Ｒでは、前記初期状態Ｐと比較して、これらの受け面３０，３５間での接触面積が減少する。
【００５２】
〔第２実施形態〕
次に、本発明の第２実施形態にかかる首振り式剃刀について第１実施形態との相違点を中心に図５を参照して説明する。
【００５３】
左右両プッシャ１１として、ホルダヘッド７の前端部１３の前面１３ａから突出する片持ち梁状ばね３６が設けられている。この左右両片持ち梁状ばね３６は第１実施形態の左右両プッシャ１１（図３，４参照）と同一形態になっている。なお、第２実施形態は首振り回動中心線Ｃの位置が第１実施形態と異なる。この片持ち梁状ばね３６は上下方向Ｚに撓み、この片持ち梁状ばね３６の自由端部に形成された受け部１７において、上側押圧部１９には想定平面Ｍ上の受け面３０で上側支持部２８が形成されているとともに、下側押圧部２０には想定平面Ｍ上の受け面３０で下側支持部２９が形成されている。前記剃刀ヘッド１の初期状態Ｐで、左右両受け面３０は、上方から下方に向うに従い、ホルダヘッド７の前端部１３の前面１３ａに想定された基準面Ｗに対し離間するように、片持ち梁状ばね３６の軸線３６ａに対し傾斜している。すなわち、この基準面Ｗに対し前記上側支持部２８がなす距離をＡとし、この基準面Ｗに対し前記下側支持部２９がなす距離をＢとした場合、Ａ＜Ｂに設定されている。そのほか、前記剃刀ヘッド１の初期状態Ｐ（中立状態）や上向き首振り状態Ｑや下向き首振り状態Ｒは第１実施形態と同様である。
【００５４】
〔図６に示す第１，２実施形態の別例１〕
この別例１においては、第１，２実施形態と比較して、前記左右両プッシャ１１の受け面３０の形状を変更している。すなわち、この左右両プッシャ１１の受け面３０は、上側支持部２８と下側支持部２９との間にわたり凹んでいる。そのため、この左右両プッシャ１１の受け面３０と前記剃刀ヘッド１の左右両受け面３５との間には、前記初期状態Ｐで上側支持部２８，３３と下側支持部２９，３４との間にわたり間隙Ｇが生じる。
【００５５】
〔図７に示す第１，２実施形態の別例２〕
この別例２においては、第１，２実施形態と比較して、剃刀ヘッド１の凸部３２を変更している。すなわち、剃刀ヘッド１の刃台３１には左右両側で凹部３７が形成され、この左右両凹部３７に左右両プッシャ１１の受け部１７が嵌め込まれている。そのため、刃体３の刃先４の延設方向（左右方向Ｙ）に沿った両側でこの左右両凹部３７に設けられた両側部３７ａ間でこの左右両プッシャ１１の受け部１７が挟持される。
【００５６】
〔そのほかの別例〕
前述した第１，２実施形態及びその別例１，２では、前記ホルダ２に対する剃刀ヘッド１の首振り回動中心線Ｃが左右両プッシャ１１の上側支持部２８と下側支持部２９との間に位置している。この首振り回動中心線Ｃの位置は、剃刀ヘッド１が初期状態Ｐ（中立状態）から上下両向きへそれぞれ首振りする場合に適している。剃刀ヘッド１が初期状態Ｐ（中立状態）から上向きへのみ首振りする場合には、首振り回動中心線Ｃを下側支持部２９よりも下方位置（前記想定範囲Ｓを区画する下側想定直線ＳＤよりも下方位置）に設定する。剃刀ヘッド１が初期状態Ｐ（中立状態）から下向きへのみ首振りする場合には、首振り回動中心線Ｃを上側支持部２８よりも上方位置（前記想定範囲Ｓを区画する上側想定直線ＳＵよりも上方位置）に設定する。
【図面の簡単な説明】
【図１】（ａ）は第１実施形態にかかる首振り式剃刀において剃刀ヘッドの初期状態（中立状態）を示す側面図であり、（ｂ）はこの剃刀ヘッドを圧接するプッシャの先端部を示す部分斜視図である。
【図２】（ａ）は図１（ａ）に示す首振り式剃刀の剃刀ヘッド側を平面側から見た部分断面図であり、（ｂ）は同じく側面側から見た部分断面図である。
【図３】（ａ）は図２（ａ）の部分拡大図であり、（ｂ）は図２（ｂ）の部分拡大図である。
【図４】（ａ）は剃刀ヘッドの上向き首振り状態を示す図３（ｂ）相当図であり、（ｂ）は剃刀ヘッドの下向き首振り状態を示す図３（ｂ）相当図である。
【図５】（ａ）は第２実施形態にかかる首振り式剃刀において剃刀ヘッドの初期状態（中立状態）を示す部分平面図であり、（ｂ）は同じく部分側面図であり、（ｃ）は同じく側面側から見た部分断面図である。
【図６】（ａ）は第１，２実施形態の別例１にかかる首振り式剃刀において剃刀ヘッドの初期状態（中立状態）を示す図３（ｂ）相当図であり、（ｂ）は剃刀ヘッドの上向き首振り状態を示す図４（ａ）相当図であり、（ｃ）は剃刀ヘッドの下向き首振り状態を示す図４（ｂ）相当図である。
【図７】（ａ）は第１，２実施形態の別例２にかかる首振り式剃刀において剃刀ヘッドの初期状態（中立状態）を示す図３（ａ）相当図であり、（ｂ）は同じく図３（ｂ）相当図である。
【符号の説明】
１…剃刀ヘッド、２…ホルダ、３…刃体、７…ホルダヘッド、１１…プッシャ、１２…弾性体、１３ａ…ホルダヘッド前面、１６…腕部、１７…受け部、１９…上側押圧部、２０…下側押圧部、２１…上側段差部、２２…下側段差部、２３…プッシャの凹部、２４…開口部、２６…上側角部、２７…下側角部、２８…プッシャの上側支持部、２９…プッシャの下側支持部、３０…プッシャの受け面、３２…剃刀ヘッドの凸部、３３…剃刀ヘッドの上側支持部、３４…剃刀ヘッドの下側支持部、３５…剃刀ヘッドの受け面、３６…片持ち梁状ばね、３６ａ…軸線、３７…剃刀ヘッドの凹部、３７ａ…側部、Ｃ…首振り回動中心線、Ｐ…初期状態、Ｑ，Ｒ…首振り状態、Ｗ…基準面、Ｍ…プッシャの上下両側支持部間の想定平面、Ｚ…上下方向、Ｘ…前後方向（往復動方向）。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in the shape of a pusher that presses a razor head with its swing in a swing-type razor that supports a razor head so that the razor head can swing.
[0002]
[Prior art]
In the following Patent Document 1, as shown in the drawing, the pressure contact portion 27 of the pusher 6 presses the pressure receiving portion 11 of the razor head 1, and both arm portions 26 of the pusher 6 are on both sides of the pressure receiving portion 11 of the razor head 1. Between.
[0003]
In the following Patent Document 2, as shown in the drawing, the pressure contact portions 9 a of both leaf spring portions 9 press the pressure receiving portion 10 of the blade assembly head 2.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-93767
[Patent Document 2]
Japanese Patent No. 3014320
[0005]
[Problems to be solved by the invention]
Generally, the extension direction of the pusher (the reciprocating direction X of the pusher 6 in Patent Document 1, the axial direction of the two leaf springs 9 in Patent Document 2) is a holder (Holder 2 in Patent Document 1, Holder 1 in Patent Document 2). The angle intersecting with the extending direction is easier to use because an obtuse angle makes it difficult for the finger holding the holder during shaving to contact the face. Furthermore, when the razor head (the razor head 1 of Patent Document 1 and the blade assembly head 2 of Patent Document 2) is applied to the face, the blade body (the blade body 9 of Patent Document 1 and the patent) on the front side of the razor head. The direction of the shaving tangential surface passing through the blade edge of the blade body assembling head 2 of Document 2 is easier to use because the user can easily see the blade edge from above.
[0006]
However, in Patent Document 1 described above, the shaving tangent surface is oriented downward in a neutral state. Moreover, in said patent document 2, although the direction of a shaving tangent surface is not clear, it is the same. It is thought that this is due to the form of the pusher as described below.
[0007]
In the above-mentioned Patent Document 1, the assumed plane connecting the upper and lower fulcrum portions 27b of the pressure contact portion 27 of the pusher 6 is orthogonal to the reciprocating direction X of the pusher 6 in the neutral state. An assumed plane connecting the upper and lower support portions in the pressure contact portion 9a is inclined downward with respect to the axis of the two leaf spring portions 9 in a neutral state. In order to determine the shape of the back side of the razor head (the pressure receiving part 11 of Patent Document 1 and the pressure receiving part 10 of Patent Document 2) according to the assumed plane, and to make the shaving tangential surface slightly upward, the blade body The thickness direction of the steel must be tilted considerably upward with respect to the pusher extending direction. However, it is necessary to increase the thickness between the front side and the back side of the razor head on the cutting edge side of the razor head, which causes an undesirable problem when the razor head is thinned. By the way, if the holder is brought close to the face, the shaving tangential surface can be slightly upward, but the finger holding the holder during shaving is likely to come into contact with the face and is difficult to use.
[0008]
An object of the present invention is to provide a pusher whose shape is improved so that the direction of the shaving tangent surface of the razor head can be made upward as compared with the conventional one. Here, “easy to face upward” does not mean that the shaving tangent surface of the razor head is actually facing upward, and is set under the same conditions except for the swinging razor of the present invention and the pusher. When compared with the conventional swinging razor, it means that the shaving tangent surface is easily directed upward.
[0009]
[Means for Solving the Problems and Effects of the Invention]
Drawings of embodiments described later (first embodiment shown in FIGS. 1 to 4, second embodiment shown in FIG. 5, another example of first and second embodiments shown in FIG. 6, first and second embodiments shown in FIG. The present invention will be described with reference to the reference numeral 2).
[0010]
* Inventions of claims 1 to 3
The swing-type razor according to the invention of claim 1 (corresponding to the first and second embodiments and the other examples 1 and 2) is configured as follows.
[0011]
The swinging razor includes a razor head (1) having a blade body (3), and a holder (2) that supports the razor head (1) so as to be able to swing in the vertical direction (Z). A pusher (11) that presses the razor head (1) with its swing is provided. The initial state (P) in which the razor head (1) is supported and stopped by the pusher (11), and the razor head (1) is moved in the vertical direction Z (upward only, downward only, or both upward and downward) from the initial state (P). The upper support portion (28, 33) and the lower support portion (29, 29) that the razor head (1) and the pusher (11) can come into contact with each other in the swung state (Q, R) rotated in the direction) 34) are spaced apart from each other in the vertical direction (Z). Reference plane W (assumed plane passing through the main part of the front surface 13a, which is assumed to be on the front surface (13a) of the holder head (7) from which the pusher (11) protrudes, as a reciprocating direction X of the pusher 11 and a pusher 11 described later. The distance formed by the upper support portion (28) of the pusher (11) with respect to the assumed plane orthogonal to the axis 36a of the cantilever spring 36 is A, and the pusher (11) with respect to this reference plane (W). ) When the distance formed by the lower support portion (29) is B, A <B is set in at least the initial state (P) of the initial state (P) and the swing state (Q, R). ing.
[0012]
The swing-type razor according to the invention of claim 2 (corresponding to the first embodiment and its modifications 1 and 2) is configured as follows.
The swinging razor includes a razor head (1) having a blade body (3), and a holder (2) that supports the razor head (1) so as to be able to swing in the vertical direction (Z). A pusher (11) that is reciprocated by being urged by an elastic body (12) so as to press-contact the razor head (1) with its swing. An initial state (P) in which the razor head (1) is supported by the pusher (11) and is stationary, and a swinging motion in which the razor head (1) is rotated in the vertical direction (Z) from the initial state (P). In the state (Q, R), the upper support portion (28, 33) and the lower support portion (29, 34) in which the razor head (1) and the pusher (11) can come into contact with each other are moved vertically (Z). Are spaced apart from each other. The assumed plane (M) connecting the upper support portion (28) and the lower support portion (29) with the pusher (11) is at least the initial state of the initial state (P) and the swing state (Q, R). In the state (P), the pusher (11) is separated from the reference surface (W) assumed on the front surface (13a) of the holder head (7) from which the pusher (11) protrudes from the upper side to the lower side. ) In the reciprocating direction (X).
[0013]
The swing-type razor according to the invention of claim 3 (corresponding to the second embodiment and its modifications 1 and 2) is configured as follows.
The swinging razor includes a razor head (1) having a blade body (3), and a holder (2) that supports the razor head (1) so as to be able to swing in the vertical direction (Z). A cantilever spring (36) protruding from the holder head (7) is provided as a pusher (11) for urging the razor head (1) so as to come into pressure contact with its swing. An initial state (P) in which the razor head (1) is supported by the pusher (11) and is stationary, and a swinging motion in which the razor head (1) is rotated in the vertical direction (Z) from the initial state (P). In the state (Q, R), the upper support portion (28, 33) and the lower support portion (29, 34) with which the razor head (1) and the pusher (11) can contact each other are used as the pusher (11). The cantilever-like springs (36) are provided at the free ends so as to be separated from each other in the vertical direction (Z). The assumed plane (M) connecting the upper support portion (28) and the lower support portion (29) with the pusher (11) is at least the initial state of the initial state (P) and the swing state (Q, R). In the state (P), the reference surface (W) assumed on the front surface (13a) of the holder head (7) from which the cantilever spring (36) as the pusher (11) protrudes from the upper side to the lower side. It inclines with respect to the axis line (36a) of the said cantilever-like spring (36) so that it may space apart.
[0014]
In the first to third aspects of the invention, the assumed plane (M) connecting the upper support portion (28) and the lower support portion (29) with the pusher (11) has an upward shape, so that the razor head (1) In the initial state (P), the assumed plane (N) connecting the upper support portion (33) and the lower support portion (34) is also shaped upward in accordance with the assumed plane (M) of the pusher (11). Can do. Therefore, without increasing the thickness of the razor head (1), the thickness direction of the blade body (3) can be easily made upward according to the assumed plane (N) of the razor head (1). Accordingly, the angle (α) formed by the shaving tangent surface (H) of the razor head (1) with respect to the reciprocating direction (X) of the pusher (11) and the axis (36a) of the cantilever spring (36) is increased. Setting and the direction of the shaving tangent surface (H) can be easily set upward in the initial state (P), and shaving can be easily performed.
[0015]
* Invention of claim 4 (corresponding to the first and second embodiments and the other examples 1 and 2)
In the invention of Claim 4 based on the invention of Claim 1 or Claim 2 or Claim 3, the swing rotation center line (C) of the razor head (1) relative to the holder (2) is the pusher ( 11) between the upper support part (28) and the lower support part (29). That is, an assumed straight line (SU, SD) parallel to the reciprocating direction (X) of the pusher (11) or parallel to the axis (36a) of the cantilever spring (36) as the pusher (11). The swivel rotation center within an assumed range (S) between an upper assumed straight line (SU) passing through the upper support part (28) and a lower assumed straight line (SD) passing through the lower support part (29). It means that the line (C) is located.
[0016]
In the invention of claim 4, the upper support portion (28) and the lower support portion (29) of the pusher (11) are both set to positions close to the swinging rotation center line (C) of the razor head (1). The razor head (1) can be stabilized in the initial state (P) and the swinging state (Q, R).
[0017]
* Invention of Claim 5 (corresponding to the first and second embodiments and the other examples 1 and 2)
The invention of claim 5 based on the invention of any one of claims 1 to 4 is configured as follows.
[0018]
The pusher (11) is disposed on both sides along the extending direction (Y) of the blade edge (4) of the blade body (3) of the razor head (1). Between these pushers (11), the upper support portion (28) and lower support portion (29) of one pusher (11) and the upper support portion (28) and lower support portion (29) of the other pusher (11) ( 29), a recess (23) is formed that is open in the vertical direction (Z). A convex part (32) formed on the razor head (1) is fitted into the concave part (23) through the opening (24) and is sandwiched between the pushers (11).
[0019]
In the invention of claim 5, since both sides of the razor head (1) are supported by both pushers (11), the razor head (1) can be stabilized. Further, the engagement of the concave portion (23) between the pushers (11) and the convex portion (32) of the razor head (1) prevents the razor head (1) from sideways with respect to the pusher (11). The head (1) can be stabilized.
[0020]
* Invention of Claim 6 (corresponding to the first and second embodiments and their modifications 1 and 2)
In the invention of claim 6 based on the invention of claim 5, in the opening (24) of the recess (23) between the two pushers (11), the upper support part (28) and the lower part of one pusher (11). The distance (25a) in the direction (Y) connecting the side support portion (29) and the upper support portion (28) and the lower support portion (29) of the other pusher (11) is the front surface of the holder head (7) ( 13a) increases in the direction away from (a).
[0021]
In the invention of claim 6, it is easy to fit the convex portion (32) of the razor head (1) into the concave portion (23) between the pushers (11).
* Invention of claim 7 (corresponding to another example 2 of the first and second embodiments)
In the invention of claim 7 premised on the invention of any one of claims 1 to 4, the razor head (1) is formed with a recess (37) into which the pusher (11) is fitted. The pusher (11) is sandwiched between both side portions (37a) provided in the concave portion (37) on both sides along the extending direction (Y) of the blade edge (4) of the blade body (3).
[0022]
According to the seventh aspect of the present invention, the razor head (1) can be prevented from being shaken by the engagement of the pusher (11) with the recess (37) of the razor head (1) to prevent the razor head (1) from sideways. It can be stabilized.
[0023]
* Invention of Claim 8 (corresponding to the first and second embodiments and the other examples 1 and 2)
The invention of claim 8 based on the invention of any one of claims 1 to 7 is configured as follows.
[0024]
The pusher (11) has an arm portion (16) protruding from the front surface (13a) of the holder head (7), and a receiving portion (17) provided at the tip of the arm portion (16). . The receiving portion (17) protrudes upward at the distal end portion of the arm portion (16) to form a step portion (21) with the distal end portion of the arm portion (16). And a lower pressing portion (20) projecting downward at the distal end portion of the arm portion (16) and forming a step portion (22) between the distal end portion of the arm portion (16). Yes. The upper support part (28) is formed in the upper pressing part (19). The lower support part (29) is formed in the lower pressing part (20).
[0025]
In the invention of claim 8, even if the arm portion (16) is narrowed in order to make the pusher (11) compact, the distance between the upper pressing portion (28) and the lower support portion (29) at the receiving portion (17). (L) can be set large and the razor head (1) can be stabilized in the initial state (P).
[0026]
* Invention of Claim 9 (corresponding to the first and second embodiments and the other examples 1 and 2)
The invention of claim 9 based on the invention of claim 8 is configured as follows.
The form of the upper pressing part (19) of the receiving part (17) is different from the form of the lower pressing part (20) of the receiving part (17). For example, the distance (21a) formed by the step portion (21) of the upper pressing portion (19) with respect to the reference surface (W) and the step portion (22) of the lower pressing portion (20) with respect to the reference surface (W). The distance (22a) formed is equal to each other, and the upper side pressing against the assumed plane (E) connecting the stepped portion (21) of the upper pressing portion (19) and the stepped portion (22) of the lower pressing portion (20). The distance (29a) formed by the lower support portion (29) of the lower pressing portion (20) with respect to the assumed plane (E) than the distance (28a) formed by the upper support portion (28) of the portion (19). It is getting bigger.
[0027]
In the invention of claim 9, it becomes easy to distinguish the upper pressing portion (19) and the lower pressing portion (20) in the pusher (11), and the assembly direction of the pusher (11) with respect to the holder head (7) is easily understood. At the same time, it is easy to support the razor head (1) with respect to the pusher (11).
[0028]
* Inventions of claims 10 to 11
The invention of claim 10 on the premise of the invention of any one of claims 1 to 9 corresponds to the first and second embodiments and other examples 1 and 2, and is configured as follows. ing.
[0029]
A receiving surface (30) is formed on an assumed plane (M) connecting the upper support portion (28) and the lower support portion (29) in the pusher (11), and the upper support portion in the razor head (1). A receiving surface (35) is formed on an assumed plane (N) connecting (33) and the lower support portion (34). The receiving surface (30) of the pusher (11) and the receiving surface (35) of the razor head (1) are opposed to each other so as to be in surface contact with each other in the initial state (P). For example, in the invention of claim 11 based on the invention of claim 10, in the initial state (P), the receiving surface (30) of the pusher (11) and the receiving surface (35) of the razor head (1) The areas that can be in surface contact with each other are 1 to 20 mm. ² It is.
[0030]
In the invention of claims 10 to 11, the razor head (1) can be stabilized in the initial state (P) by the surface contact of the both receiving surfaces (30, 35).
* Invention of Claim 12 (corresponding to the first and second embodiments and their modifications 1 and 2)
In the invention of claim 12 based on the invention of claim 10 or claim 11, in the initial state (P), the receiving surface (30) of the pusher (11) and the receiving surface (35 of the razor head (1)). And the receiving surface (30) of the pusher (11) and the receiving surface (35) of the razor head (1) in surface contact with each other in the swung state (Q, R). The possible area is reduced.
[0031]
In the invention of claim 12, the contact area between the receiving surfaces (30, 35) is reduced in the swinging state (Q, R) than in the initial state (P) of the razor head (1). The frictional resistance between the receiving surfaces (30, 35) is reduced, and a smooth swing operation can be performed.
[0032]
* Invention of Claim 13 (corresponding to the first and second embodiments and the other examples 1 and 2)
In the invention of claim 13 premised on the invention of any one of claims 1 to 12, at least of the upper support part (28) and the lower support part (29) of the pusher (11). One is formed in rounded corners (26, 27).
[0033]
In the thirteenth aspect of the invention, during the swinging motion, the razor head (1) can be smoothly rotated relative to the holder head (7).
* Invention of Claim 14 (corresponding to another example 1 of the first and second embodiments)
The invention of claim 14 based on the invention of any one of claims 1 to 9 is configured as follows.
[0034]
The pusher (11) forms a receiving surface (30) connecting the upper support portion (28) and the lower support portion (29), and the razor head (1) has an upper support portion (33) and a lower support portion. A receiving surface (35) connecting the portion (34) is formed. Between the receiving surface (30) of the pusher (11) and the receiving surface (35) of the razor head (1), the upper support (28, 33) and the lower support ( 29, 34) to create a gap (G).
[0035]
In the invention of claim 14, the razor head (1) can be stabilized in the initial state (P) by supporting the two portions by the upper support portion (28, 33) and the lower support portion (29, 34). .
[0036]
* Invention of Claim 15 (corresponding to the first and second embodiments and the other examples 1 and 2)
In the invention of claim 15 premised on the invention of any one of claims 1 to 14, the razor head (1) is moved upward and downward in the vertical direction (Z) in the initial state ( The holder (2) is supported so as to be able to swing from P).
[0037]
In the invention of claim 15, in the razor head (1) capable of swinging upward and downward from the initial state (P), the effect of the invention of any one of claims 1 to 14 is exhibited. be able to.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
First, a swinging razor according to a first embodiment of the present invention will be described with reference to FIGS.
[0039]
<Outline of swinging razor>
As shown in FIG. 1A, the swinging razor includes a razor head 1 and a holder 2 that supports the razor head 1 so as to be able to swing in the vertical direction Z.
[0040]
As shown in FIG. 2, a plurality of blade bodies 3 are incorporated on the front side of the razor head 1. The blade body 3 has a blade edge 4 extending in the left-right direction Y and a back edge 5 on the opposite side of the blade edge 4. The cutting edge 4 is directed downward, and the back edge 5 is directed upward. On the front side of the razor head 1, a shaving tangent surface H passing through the cutting edge 4 of each blade body 3 is provided.
[0041]
The holder 2 includes a gripping portion 6 and a holder head 7 provided integrally at the upper end portion of the gripping portion 6. The holder head 7 incorporates left and right support arms 8, an operation unit 9, both right and left pushers 11 of a reciprocating member 10, and an elastic body 12 (compression coil spring). The operation unit 9 is supported so as to be able to reciprocate in the front-rear direction X with respect to the holder head 7. The reciprocating member 10 is supported on the front side of the operation unit 9 so as to reciprocate in the front-rear direction X with respect to the holder head 7 and the operation unit 9. In the holder 2, the angle θ formed by the extending direction 6 a of the gripping part 6 with respect to the reciprocating direction (front-rear direction X) of the reciprocating member 10 is an obtuse angle. The elastic body 12 is supported between the reciprocating member 10 and the operation unit 9. Due to the urging force of the elastic body 12, the reciprocating member 10 and the operation portion 9 are separated from each other, and both the left and right pushers 11 of the reciprocating member 10 protrude forward from the front end portion 13 of the holder head 7 and are stationary. The operation unit 9 is retracted and is stationary. The left and right support arms 8 are rotatably supported by left and right support shafts 14 on both the left and right sides of the operating portion 9, and the outer end portions 8 a of the left and right support arms 8 are holder heads on the left and right sides of the left and right pushers 11. 7 protrudes forward from the front end 13 of the head.
[0042]
When the operation portion 9 is set to the forward movement position, the outer end portions 8a of the left and right support arms 8 open to each other. When the operation portion 9 is set to the retracted position, the outer end portions 8a of the left and right support arms 8 are closed to each other. When the right and left pushers 11 are pressed against the back side of the razor head 1 and the left and right support arms 8 are closed, the razor head 1 can be rotated by the left and right rotation support portions 15 by their outer ends 8a. Supported and can swing. When the left and right support arms 8 are opened to each other, the left and right rotation support portions 15 are detached from the outer end portions 8 a and the razor head 1 is separated from the holder head 7.
[0043]
<Details of the left and right pushers 11 of the reciprocating member 10>
The left and right pushers 11 are integrally formed as a part of the reciprocating member 10 and are disposed on both sides along the extending direction (left and right direction Y) of the blade edge 4 of each blade body 3 of the razor head 1. Yes. Incidentally, the reciprocating member 10 is formed of nylon containing glass fibers in an appropriate ratio. As shown in FIGS. 1B and 3, the left and right pushers 11 include an arm portion 16 protruding from the front surface 13 a of the front end portion 13 of the holder head 7 and a receiving portion formed at the distal end portion of the arm portion 16. A portion 17 and a connecting portion 18 formed between the both arm portions 16 are provided. The receiving portion 17 includes an upper pressing portion 19 that protrudes upward at the distal end portion of the arm portion 16 and a lower pressing portion 20 that protrudes downward at the distal end portion of the arm portion 16. Step portions 21 and 22 are formed between the pressing portion 19 and the lower pressing portion 20 and the distal end portion of the arm portion 16, respectively.
[0044]
Between the left and right receiving parts 17, the left and right arm parts 16 and the connecting part 18, a recess 23 is formed which is opened in the vertical direction Z by an opening 24 between the receiving parts 17. In the opening 24, chamfered portions 25 are formed opposite to each other on the left and right receiving portions 17. The left and right double-sided chamfered portions 25 are inclined so that the interval 25a in the left-right direction Y increases toward the front away from the front surface 13a of the front end portion 13 of the holder head 7.
[0045]
Rounded corners 26 and 27 are formed at the upper end portion of the upper pressing portion 19 and the lower end portion of the lower pressing portion 20 of the left and right receiving portions 17, and the upper support portion 28 is provided at the upper corner portion 26. The lower support portion 29 is formed at the lower corner portion 27 while being formed. The upper support portion 28 and the lower support portion 29 are spaced apart from each other in the vertical direction Z with a predetermined interval L, and a receiving surface 30 is provided on an assumed plane M connecting the upper support portion 28 and the lower support portion 29. Is formed.
[0046]
Assuming a reference surface W in the up-down direction Z passing through the front surface 13a of the front end portion 13 of the holder head 7, the receiving surfaces 30 of the left and right pushers 11 are separated from the reference surface W from the top to the bottom. Thus, the pusher 11 is inclined with respect to the reciprocating direction (front-rear direction X). That is, if the distance formed by the upper support portion 28 with respect to the reference plane W is A and the distance formed by the lower support portion 29 with respect to the reference plane W is B, A <B is set.
[0047]
The form of the upper pressing part 19 of the receiving part 17 and the form of the lower pressing part 20 of the receiving part 17 are different from each other. That is, the distance 21a formed by the upper step 21 with respect to the reference plane W and the distance 22a formed by the lower step 22 with respect to the reference plane W are equal to each other, but the upper step 21 and the lower step 22 are A distance 29a formed by the lower support portion 29 with respect to the assumed plane E is larger than a distance 28a formed by the upper support portion 28 with respect to the assumed plane E to be connected.
[0048]
<Back side of the razor head 1>
On the blade base 31 incorporated on the back side, a convex portion 32 is formed facing the concave portion 23 between the left and right pushers 11, and an upper support portion 33 and a lower portion are respectively provided on the left and right sides of the convex portion 32. A side support portion 34 is formed. The upper support portion 33 and the lower support portion 34 are separated from each other in the vertical direction Z with a predetermined interval L, and a receiving surface 35 is provided on an assumed plane N connecting the upper support portion 33 and the lower support portion 34. Is formed.
[0049]
<Initial state P of the razor head 1 shown in FIGS.
In this initial state P (neutral state), the razor head 1 is supported by the left and right support arms 8 so as to be rotatable in the vertical direction Z, and is pressed against and fixed by the left and right pushers 11. The convex portion 32 of the razor head 1 is fitted into the concave portion 23 from the opening 24 by the left and right pushers 11 and is sandwiched between the left and right receiving portions 17 and between the left and right arm portions 16. The left and right receiving surfaces 35 of the razor head 1 are in contact with the receiving surfaces 30 of the left and right pushers 11, and the upper support portions 28 and 33 of these receiving surfaces 30 and 35 are in contact with each other. The lower support portions 29 and 34 of the 35 abut against each other. Therefore, both the left and right receiving surfaces 35 of the razor head 1 are also inclined with respect to the reciprocating direction (front-rear direction X) of the pusher 11 so as to be separated from the reference surface W as it goes downward from above. When the distance formed by the upper support portion 33 is A and the distance formed by the lower support portion 34 with respect to the reference plane W is B, A <B is set. Accordingly, the shaving tangent surface H of the razor head 1 is also inclined in accordance with the left and right receiving surfaces 30 and 35, and the angle formed by the shaving tangent surface H with respect to the reciprocating direction (the front-rear direction X) of the pusher 11. It becomes easy to set upward so that α is larger than the conventional one. Both the receiving surfaces 30 and 35 including the upper support portions 28 and 33 and the lower support portions 29 and 34 include not only a flat surface such as a square or a rectangle but also a surface extending in a thin line shape. 1-20mm for contact area ² It has become. Although not shown, one of the receiving surfaces 30 and 35 may be a concave surface, and the other may be a convex surface in surface contact with the concave surface. The swivel rotation center line C of the razor head 1 with respect to the holder 2 is located between the upper support portion 28 and the lower support portion 29 of the left and right pushers 11, and the reciprocating direction of the left and right pushers 11 (the front-rear direction). X) and is located within an assumed range S between an upper assumed straight line SU passing through the upper support 28 and a lower assumed straight line SD passing through the lower support 29.
[0050]
<Upward swing state Q of the razor head 1 shown in FIG. 4A>
When the razor head 1 is pushed during shaving and pivots upward about the pivot centerline C, the upper support portion 33 side of the left and right receiving surfaces 35 of the razor head 1 faces the receiving surfaces 30 of the left and right pushers 11. The lower support portions 29 and 34 of these receiving surfaces 30 and 35 are spaced apart from each other while being always in contact with and supported by the upper support portion 28 side. Therefore, in the upward swing state Q, the contact area between the receiving surfaces 30 and 35 is reduced as compared with the initial state P.
[0051]
<Downward swinging state R of the razor head 1 shown in FIG. 4B>
When the razor head 1 is pushed during shaving and pivots downward about the pivot centerline C, the lower support portion 34 side of the left and right receiving surfaces 35 of the razor head 1 receives the receiving surfaces 30 of the left and right pushers 11. The upper support portions 28 and 33 of the receiving surfaces 30 and 35 are separated from each other while being always in contact with and supported by the lower support portion 29 side. Therefore, in the downward swing state R, the contact area between the receiving surfaces 30 and 35 is reduced as compared with the initial state P.
[0052]
[Second Embodiment]
Next, a swing-type razor according to a second embodiment of the present invention will be described with reference to FIG. 5 with a focus on differences from the first embodiment.
[0053]
As the left and right pushers 11, cantilever springs 36 protruding from the front surface 13 a of the front end portion 13 of the holder head 7 are provided. The left and right cantilever springs 36 have the same form as the left and right pushers 11 (see FIGS. 3 and 4) of the first embodiment. The second embodiment differs from the first embodiment in the position of the swing rotation center line C. The cantilever spring 36 bends in the vertical direction Z. In the receiving portion 17 formed at the free end of the cantilever spring 36, the upper pressing portion 19 has an upper surface at the receiving surface 30 on the assumed plane M. A support portion 28 is formed, and a lower support portion 29 is formed on the lower pressing portion 20 with a receiving surface 30 on the assumed plane M. In the initial state P of the razor head 1, the left and right receiving surfaces 30 are cantilevered so as to be separated from the reference surface W assumed on the front surface 13 a of the front end portion 13 of the holder head 7 as it goes downward from above. The beam spring 36 is inclined with respect to the axis 36a. That is, if the distance formed by the upper support portion 28 with respect to the reference plane W is A and the distance formed by the lower support portion 29 with respect to the reference plane W is B, A <B is set. In addition, the initial state P (neutral state), the upward swing state Q, and the downward swing state R of the razor head 1 are the same as those in the first embodiment.
[0054]
[Another example 1 of the first and second embodiments shown in FIG. 6]
In this other example 1, the shape of the receiving surface 30 of the left and right pushers 11 is changed as compared with the first and second embodiments. That is, the receiving surface 30 of the left and right pushers 11 is recessed between the upper support portion 28 and the lower support portion 29. Therefore, between the receiving surfaces 30 of the left and right pushers 11 and the left and right receiving surfaces 35 of the razor head 1, there is a gap between the upper support portions 28 and 33 and the lower support portions 29 and 34 in the initial state P. A gap G is generated over the entire area.
[0055]
[Another example 2 of the first and second embodiments shown in FIG. 7]
In this other example 2, the convex part 32 of the razor head 1 is changed compared with 1st, 2 embodiment. That is, recesses 37 are formed on the left and right sides of the blade base 31 of the razor head 1, and the receiving portions 17 of the left and right pushers 11 are fitted into the left and right recesses 37. Therefore, the receiving portions 17 of the left and right pushers 11 are sandwiched between both side portions 37a provided in the left and right concave portions 37 on both sides along the extending direction (left and right direction Y) of the cutting edge 4 of the blade body 3.
[0056]
[Other examples]
In the first and second embodiments described above and the other modifications 1 and 2, the swinging rotation center line C of the razor head 1 with respect to the holder 2 is formed between the upper support portion 28 and the lower support portion 29 of the left and right pushers 11. Located between. The position of the swinging rotation center line C is suitable for the case where the razor head 1 swings from the initial state P (neutral state) upward and downward. When the razor head 1 swings upward only from the initial state P (neutral state), the swinging rotation center line C is positioned below the lower support portion 29 (a lower assumption that defines the assumed range S). Set to a position below the straight line SD). When the razor head 1 swings only downward from the initial state P (neutral state), the swing center line C is positioned above the upper support 28 (the upper assumed straight line SU that defines the assumed range S). To the upper position).
[Brief description of the drawings]
FIG. 1A is a side view showing an initial state (neutral state) of a razor head in a swing-type razor according to a first embodiment, and FIG. 1B shows a tip of a pusher that presses the razor head. It is a fragmentary perspective view shown.
2A is a partial cross-sectional view of the razor head side of the swing-type razor shown in FIG. 1A viewed from the plane side, and FIG. 2B is a partial cross-sectional view similarly viewed from the side surface side. .
3A is a partially enlarged view of FIG. 2A, and FIG. 3B is a partially enlarged view of FIG. 2B.
4A is a view corresponding to FIG. 3B showing the upward swing state of the razor head, and FIG. 4B is a view corresponding to FIG. 3B showing the downward swing state of the razor head.
FIG. 5A is a partial plan view showing an initial state (neutral state) of a razor head in a swing-type razor according to a second embodiment, and FIG. 5B is a partial side view of the same. FIG. 3 is a partial sectional view as seen from the side surface.
6A is a view corresponding to FIG. 3B showing an initial state (neutral state) of a razor head in a swing-type razor according to another example 1 of the first and second embodiments, and FIG. FIG. 4A is a view corresponding to FIG. 4A showing the upward swing state of the razor head, and FIG. 4C is a view corresponding to FIG. 4B showing the downward swing state of the razor head.
7A is a view corresponding to FIG. 3A showing an initial state (neutral state) of a razor head in a swing-type razor according to another example 2 of the first and second embodiments, and FIG. Similarly, it is equivalent to FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Razor head, 2 ... Holder, 3 ... Blade body, 7 ... Holder head, 11 ... Pusher, 12 ... Elastic body, 13a ... Holder head front surface, 16 ... Arm part, 17 ... Receiving part, 19 ... Upper press part, DESCRIPTION OF SYMBOLS 20 ... Lower press part, 21 ... Upper step part, 22 ... Lower step part, 23 ... Recessed part of a pusher, 24 ... Opening part, 26 ... Upper corner part, 27 ... Lower corner part, 28 ... Upper support of a pusher 29: Pusher lower support part, 30: Pusher receiving surface, 32 ... Razor head convex part, 33 ... Razor head upper support part, 34 ... Razor head lower support part, 35 ... Razor head Receiving surface, 36 ... cantilever spring, 36a ... axis, 37 ... concave portion of razor head, 37a ... side, C ... swing centerline, P ... initial state, Q, R ... swing state, W ... reference plane, M ... assumed plane between upper and lower support parts of pusher, Z ... up-down direction, ... the front-rear direction (reciprocating direction).

Claims

In a swing-type razor comprising a razor head having a blade body and a holder that supports the razor head so as to be able to swing in the vertical direction, and provided with a pusher that presses the razor head in accordance with the swinging of the razor head,
An upper support portion in which the razor head and the pusher can come into contact with each other in an initial state in which the razor head is supported by the pusher and is stationary, and a swinging state in which the razor head is rotated up and down from the initial state; The lower support part is provided apart from each other in the vertical direction,
When the distance formed by the upper support portion of the pusher with respect to the reference surface assumed on the front surface of the holder head from which the pusher protrudes is A, and the distance formed by the lower support portion of the pusher with respect to the reference surface is B, A swing-type razor characterized in that A <B is set at least in the initial state.

A razor head having a blade body and a holder that supports the razor head so that the razor head can be swung in the vertical direction, and can reciprocate while being urged by an elastic body so as to press-contact the razor head as the head swings. In a swinging razor with a pusher,
An upper support portion in which the razor head and the pusher can come into contact with each other in an initial state in which the razor head is supported by the pusher and is stationary, and a swinging state in which the razor head is rotated up and down from the initial state; The lower support part is provided apart from each other in the vertical direction,
The assumed plane connecting the upper support portion and the lower support portion with the pusher is at least in the initial state so as to be separated from the assumed reference surface on the front surface of the holder head from which the pusher protrudes from the upper side to the lower side. Further, the swinging razor is inclined with respect to the reciprocating direction of the pusher.

A razor head having a blade body and a holder that supports the razor head so that the razor head can be swung in the vertical direction, and protrudes from the holder head as a pusher that urges the razor head so as to come into pressure contact with the swing. In a swinging razor with a cantilever spring,
An upper support portion in which the razor head and the pusher can come into contact with each other in an initial state in which the razor head is supported by the pusher and is stationary, and a swinging state in which the razor head is rotated up and down from the initial state; A lower support portion and a free end portion of the cantilever-like spring as a pusher, provided apart from each other in the vertical direction;
The assumed plane connecting the upper support portion and the lower support portion with the pusher is assumed on the front surface of the holder head from which the cantilever spring as the pusher protrudes from the upper side to the lower side at least in the initial state. An oscillating razor characterized by being inclined with respect to the axis of the cantilever spring so as to be separated from a reference plane.

The swing rotation center line of the razor head with respect to the holder is located between the upper support portion and the lower support portion of the pusher. The swing razor described.

The pushers are disposed on both sides along the extending direction of the cutting edge of the blade body of the razor head, and the upper support portion and the lower support portion of one pusher and the upper support portion of the other pusher are disposed between the pushers. And a concave portion opened in the vertical direction at an opening portion between the lower support portion and the convex portion formed on the razor head is fitted into the concave portion from the opening portion and sandwiched between both pushers. The swinging razor according to any one of claims 1 to 4.

In the opening of the recess between the two pushers, the distance between the upper support portion and the lower support portion of one pusher and the upper support portion and the lower support portion of the other pusher is a direction away from the front surface of the holder head. The swinging razor according to claim 5, wherein the swinging razor is larger toward the head.

The razor head is formed with a recess into which the pusher is fitted, and the pusher is sandwiched between both side portions provided in the recess on both sides along the extending direction of the blade edge of the blade body. The swinging razor according to any one of claims 1 to 4.

The pusher has an arm portion protruding from the front surface of the holder head, and a receiving portion provided at a tip portion of the arm portion,
The receiving portion protrudes upward at the tip of the arm and forms a step portion with the tip of the arm, and protrudes downward at the tip of the arm. A lower pressing portion having a stepped portion formed between the front end portion of the arm portion, the upper support portion is formed on the upper pressing portion, and the lower support portion is formed on the lower pressing portion. The swinging razor according to any one of claims 1 to 7, wherein the swinging razor is provided.

The swinging razor according to claim 8, wherein a shape of the upper pressing portion of the receiving portion and a shape of the lower pressing portion of the receiving portion are different from each other.

Forming a receiving surface on an assumed plane connecting the upper support portion and the lower support portion in the pusher, and forming a receiving surface on an assumed plane connecting the upper support portion and the lower support portion in the razor head; The neck according to any one of claims 1 to 9, wherein the receiving surface of the pusher and the receiving surface of the razor head are opposed to each other so as to be in surface contact with each other in the initial state. Swing razor.

The swingable razor according to claim 10, wherein an area in which the receiving surface of the pusher and the receiving surface of the razor head can come into surface contact with each other in the initial state is 1 to ²⁰ mm ² .

The area in which the receiving surface of the pusher and the receiving surface of the razor head can be in surface contact with each other in the swing state than the area in which the receiving surface of the pusher and the receiving surface of the razor head can be in surface contact with each other in the initial state. The swinging razor according to claim 10 or 11, wherein the oscillating razor is reduced.

13. The invention according to claim 1, wherein at least one of the upper support portion and the lower support portion of the pusher is formed at a rounded corner portion. The swing-type razor according to the item.

The pusher forms a receiving surface connecting the upper support portion and the lower support portion, and the razor head forms a receiving surface connecting the upper support portion and the lower support portion. The receiving surface of the pusher and the razor The gap according to any one of claims 1 to 9, wherein a gap is formed between the upper support portion and the lower support portion in the initial state between the receiving surface of the head and the receiving surface. Swing razor.

15. The razor head according to claim 1, wherein the razor head is supported with respect to the holder so as to be able to swing from the initial state upward and downward in the vertical direction. Swing razor.