JP4116701B2

JP4116701B2 - Annular cushion and cushion cover

Info

Publication number: JP4116701B2
Application number: JP20021998A
Authority: JP
Inventors: 純一清水
Original assignee: 清水てるみ
Priority date: 1998-07-15
Filing date: 1998-07-15
Publication date: 2008-07-09
Anticipated expiration: 2018-07-15
Also published as: JP2000023796A

Description

【０００１】
【発明の属する技術分野】
この発明は、環状に形成され枕や座布団やソファとして使用するためのクッションと、このクッションに用いるクッションカバーとに関するものである。
【０００２】
【従来の技術】
従来より角型、丸型で中にクッション材を入れたクッションが枕や座布団やソファとして広く用いられている。このような形状の枕は就寝者の頭部背面全体が枕の上面に密着することになる。
【０００３】
このため特に夏期などに汗をかくと、汗の発散が悪く頭髪を傷めるという問題がある。また乳幼児を寝かせる場合に、仰向きにすると頭部背面が平らな枕に当たって扁平化し、頭の形状が悪くなるともいわれている。またこのような形状の座布団あるいはソファを床に置いて足をのばしたりあぐらをかいて着座する場合には、着座者は強い前屈姿勢をとるために腰に大きな負担がかかり、長時間の着座時に大きな苦痛を伴う。さらにこの座布団は通常中央付近が高くなっているため、着座時に腰の安定性が悪いという問題もあった。
【０００４】
そこで枕や座布団あるいはソファを環状にすることが考えられる。例えば同一出願人が提案した環状のクッションを枕として使用することが考えられる（実願平９−２７２９号）。この環状のクッションを枕に用いた場合には、環状の部分の中に空間が形成されるため、通気性が良好になって頭部が汗で蒸れることがなくなる。また中央の空間部分が陥没しているので、乳幼児の頭の形状が悪くなることもなくなる。一方この環状のクッションを座布団あるいはソファとして使用する場合には、中央付近に開口部分があるため、この開口部分に腰を落し込んで腰を安定させることができる。
【０００５】
【従来の技術の問題点】
しかしこの既提案のクッションは環状部分の直径が一定のもの、あるいは対称位置の直径が最大および最小となるように連続的に変化したものであった。このためこれを枕に用いた場合には、頭部の安定性が悪くなったり頭を左右に回しにくいという問題があった。
【０００６】
すなわち環状部分の直径が全周に亘って一定のものでは、頭部背面の首筋側が当たる高さと頭頂側が当たる高さとが同一になるため、頭の座りが悪く使用感が悪い。また環状部分の直径が連続的変化するものでは、最小径の部分で頭を左右に回しにくく最大径の部分で頭が不安定になる。このため同様に頭の座りが悪く使用感が悪くなるものであった。
【０００７】
同様にこの環状のクッションを座布団やソファに用いる場合には、中央付近の開口部分の中に腰が深く入り込んで前屈姿勢が一層強くなる。このため長時間の着座に伴う苦痛を和らげることが困難であった。また環状部分の直径を連続的に変化させた環状クッションでは、最大径の部分に腰の背中側あるいは腰椎付近が当たるようにして使用することになるが、この場合には最大径の部分の両側が低くなるために腰の背中側あるいは腰椎付近の支持が不安定になる。さらに最小径の部分には大腿部側が載ることになるが、この最小径の部分の両側が次第に高くなるために大腿部の安定性が悪くなる。
【０００８】
【発明の目的】
本発明はこのような事情に鑑みなされたものであり、枕として用いる場合には頭の安定性が良く、左右へ頭を回す動作もし易くなり使用感に優れ、座布団やソファとして用いる場合には、前屈姿勢を緩和して着座に伴う苦痛を和らげ、腰を安定して支持することができる環状クッションを提供することを第１の目的とする。またこの環状クッションに適用するクッションカバーを提供することを第２の目的とする。
【０００９】
【発明の構成】
本発明によればこの第１の目的は、略截頭円錐面からなる一対の表布半体の底面の開口縁同志および頂面の開口縁同志を縫合して内部に弾性材を充填することにより円環状に形成すると共に、少なくとも一方の表布半体を形成する前記略截頭円錐面の最短母線長の部分および最長母線長の部分をほぼ対称位置に配置し、これらの少なくとも一方を周方向に所定長さ連続させたことを特徴とする環状クッション、により達成される。
【００１０】
ここに一対の表布半体は同一または対称に形成しておいてもよいし、一方の表布半体を母線長が一定な截頭円錐面で形成してもよい。最短母線長の部分と最長母線長の部分とをほぼ対称位置にそれぞれ所定長さ連続させて設ければ、枕として用いた場合には首筋側と頭頂側で頭が当たる部分が共に平坦になり、また座布団やソファとして用いた場合には、腰の背中側および大腿部が当たる部分が共に平坦になるから、一層好ましい。
【００１１】
このようなクッションは、略截頭円錐面の底面を平坦にし、頂面が周方向のほぼ対称位置でこの底面に平行かつ高さが異なる２つの平面を含むように形成することにより作ることができる。
【００１２】
表布半体を略截頭円錐面で形成するのに代えて略截頭楕円錐面を用いたり、略截頭長円錐面を用いてもよい。この場合には楕円錐面または長円錐面の底面の長軸にほぼ沿って連続する母線長を最長または最短にすることができる。
【００１３】
これらの環状クッションにおいて、中央付近の開口部分に補助クッションを嵌め込むことができる。この場合には開口部分に頭が深く入り込んで寝る時の首の屈曲が強くなりすぎたり、腰が入り込んで腰の前屈姿勢が強くなって苦痛が増大するのを防止できる。
【００１４】
第２の目的は、表布半体を截頭円錐面で形成した円環状の環状クッションに用いられるクッションカバーであって、底面の開口縁の周長が環状クッションの外周長にほぼ等しい円錐面で形成されていることを特徴とするクッションカバー、により達成できる。
【００１５】
ここにクッションカバーの形状は、表布半体の形状に対応して変更するのは勿論である。例えば表布半体を略截頭楕円錐面で形成する時は楕円錐面に、略截頭長円錐面で形成する時は長円錐面にする。ここにクッションカバーの開口縁に沿ってゴム紐を通したり紐を通しておけば、この開口縁を環状クッションの外周縁に被せてから絞ることにより、カバーがクッションから脱落するのを防止することができる。
【００１６】
【作用】
円環状、楕円環状または長円環状のクッションは、母線長が最小・最大の部分に対応する部分で太さが最小・最大になり、これら太さが最小・最大の部分が所定長さ連続する。このため頭や腰が安定する。
【００１７】
枕に用いる場合は頭を左右に回す動作もし易くなる。ここに頭の首筋側が太さ最小の部分に当たり、頭の頂部側が太さ最大の部分に当たるから、頭を安定に支持することができる。座布団やソファに用いる場合は大腿部を最小径の部分に当て、腰を最大径の部分で支えるから腰の前屈姿勢を弱めて楽な姿勢をとることが可能になり、姿勢が安定する。中央の開口部分に盤状の補助クッションを嵌め込めば、頭や腰がこの開口部内に深く落ち込むことがなくなり、首や腰の屈曲が過大になるのを防ぐことができる。
【００１８】
クッションカバーはその開口縁を環状クッションの外周縁に被せて用いる。クッションカバーは環状クッションの形状の対応して円錐面、楕円錐面、長円錐面、角錐面などに作られるから、環状クッションの特に外周面に皺を発生することなく良好に密着する一方、その頂点側を環状クッションの開口部分に収納することができる。
【００１９】
【実施態様】
図１はこの発明の一実施態様の斜視図、図２は同じく平面図、図３は同じく正面図、図４は右側面図、図５は表布半体の形状を示す斜視図、図６はその縫合方法の説明図、図７は枕としての使用状態を示す図である。また図８は表布半体の展開図、図９はその直線Ｌの長さを求める方法の説明図である。
【００２０】
このクッション１０は、外径（直径）が２Ｒ、内径（直径）が２ｒであり、環状部分の直径が最大の部分Ｍ（図１，２）でΦ_M、最小の部分ｍでΦ_mの円形であるものとする。この場合には表布半体１２は図８のように截断される。
【００２１】
この図８で表布半体１２の外周の径（半径）をＲ₀、切欠き部分１４の角度をθ₀とする。環状部分の最小直径（Φ_m）の部分ｍに対応する内周径（半径）をＲ₁、その角度をθ₁とする。最大直径（Φ_M）の部分Ｍに対応する内周径（半径）をＲ₂，その角度をθ₂とする。
【００２２】
この表布半体１２を、その切欠き部分１４を縫合すれば図５の（Ａ）に示す略截頭円錐体１６となる。この場合に、この円錐体１６の底面は円形で、その外周長が図２に示した枕１０の外周長に等しいことと、円錐体１６の頂面の外周長が第２の枕１０の内周長に等しいことから、次の式を求める。
【００２３】
２πＲ＝２πＲ₀×（３６０−θ₀）／３６０
２πｒ＝２πＲ₁×θ₁／３６０＋２πＲ₂×θ₂／３６０＋２Ｌ
Ｒ₀−Ｒ₂＝πΦ_M／２
Ｒ₀−Ｒ₁＝πΦ_m／２
【００２４】
ここにＬは最大径部Ｍと最小径部ｍとの間を連続的につなぐ部分、すなわち図１，２でＮの部分に対応し、図８の展開図上で直線で表す場合には次のように求めることができる。すなわち図９に示す三角形ＡＢＣにおいて、三角形の余弦公式を用いれば、次式で求めることができる。
【００２５】
Ｌ²＝Ｒ₁ ²＋Ｒ₂ ²−２Ｒ₁・Ｒ₂・COS（θ₃／２）
【００２６】
一方θ₀、θ₁、θ₂、θ₃に対してはθ₀＋θ₁＋θ₂＋θ₃＝３６０°が成立すると共に、最大・最小直径部分Ｍ、ｍとその間の部分Ｎの長さの比に基づいてθ₁、θ₂、θ₃の比率が求められる。従って前記５つの式と、これらθ₀、θ₁、θ₂、θ₃に関する条件式とからなる連立方程式を解くことによって、Ｒ₀、Ｒ₁、Ｒ₂、θ₀、θ₁、θ₂、θ₃を求めることができる。この結果を用いて図８に示す表布半体１２を２枚截断する。
【００２７】
表布半体１２は切欠き１４を縫合することにより、図５の（Ａ）に示すような截頭円錐体１６すなわち底面と頂面が開いた円錐体１６を作ることができる。この円錐体１６の頂面は、図６の（Ａ）に示すように、底面からの高さが異なり対称位置にある２つの平面ｘ、ｙを傾斜面Ｚでつないだ形状となっている。
【００２８】
２枚の表布半体１２はその底面と頂面との中間で折り返される。すなわち底面および頂面の周縁を通りその延長線が円錐の頂点ｏを通る母線ｐの中間で折り返され、図５の（Ｂ）に示すようにする。この結果２枚の表布半体１２は環状山形あるいは環状溝形となり、両表布半体１２，１２の外周縁同志が縫合される。同様に内周縁同志が一部を残して縫合される。なおこの時両表布半体１２，１２は、最大・最小径部Ｍ、ｍに対応する部分、すなわち最長母線長の部分同志と、最短母線長の部分同志が対向するように位置合せされる。
【００２９】
この縫合体はその内周縁の未縫合部分（開口部）から裏返された後、図６の（Ｂ）に示すように内部に綿やウレタンフォームなどの弾性材１８が充填される。そして内周縁の未縫合部分を縫合すればよい。このように各表布半体１２，１２は、環状山形あるいは環状溝形にして縫合されるから、弾性材１８を充填して環状部分を略円形とした時に（図６の（Ｂ）参照）、縫合部分を無理に押し開く方向の力が作用せず、内周縁および外周縁に皺が発生しなくなる。この結果完成品１０の周縁の仕上がりが良好で、美しく滑らかになる。
【００３０】
またこのクッション１０を枕として用いた時には、図７に示すように就寝者の頭は、首筋側が最小径部ｍ（最短母線長の部分に対応する）に截り頭頂側が最大径部Ｍ（最長母線長の部分に対応する）に載る。ここに最小・最大径部ｍ、Ｍは周方向に所定長さ連続しているから、頭が安定して支持される。また頭を左右へ回し易くなる。
【００３１】
座布団やソファとして用いる時には、最小径部ｍを前にし、最大径部Ｍを後にして着座する。大腿部が乗る最小径部ｍと腰の後側を支える最大径部Ｍがそれぞれ所定長さ連続するから、前屈姿勢を弱めて楽な姿勢で安定して着座できる。さらにこのクッション１０は中央付近に円形の開口２０を有するから、この開口２０を介して汗の発散を促進させることができ、使用感が良い。なおこの開口２０を利用して物干杆に掛けて乾したり、この開口２０をフックに掛けて収納することができ、便利である。
【００３２】
【他の実施態様】
図１０は他の実施態様の表布半体１２Ａを示す図、図１１はそのＡ矢視断面図とＢ矢視断面図である。この実施態様は、表布半体１２Ａを楕円錐面で形成したものである。
【００３３】
すなわちこの表布半体１２Ａは楕円の底面を持ち、この底面の長軸ＡＸを挟んで対称位置が最小径部ｍと最大径部Ｍに対応する。ここに表布半体１２Ａの最小・最大径部ｍ、Ｍに対応する部分はそれぞれ周方向の所定長さの範囲で同一母線長となっている。
【００３４】
このため同一形状の２枚の表布半体１２Ａを最小・最大径部ｍ、Ｍ同志が対向するように重ねて縫合すれば、底面の楕円の長軸ＡＸ方向に沿って長い最小・最大径部ｍ、Ｍが形成できる。この実施態様によれば、完成した枕は楕円環状になり、最小・最大径部ｍ、Ｍを図１〜９に示した前記円環状のクッションに比べて長軸ＡＸ方向に長くできる。このため枕に用いれば頭の安定性が一層良くなり、頭を左右へ一層回し易くなる。また座布団やソファに用いれば、腰の前屈姿勢を弱めて楽な姿勢がとれ、腰を一層安定して保持できる。
【００３５】
【他の実施態様】
図１２はさらに他の実施態様を示す斜視図、図１３は表布半体１２Ｂを示す斜視図である。このクッション１０Ｂは、長円環状に形成したものである。
【００３６】
ここに表布半体１２Ｂは、長円形の底面を持つ。この底面は長さｑの長方形の両側に半円を連続させた形状であり、横向きに倒した長さｑの三角柱の両側に、２分割した円錐をつないだ形状の略長円錐面となっている。なお正しい長円錐形を１つの頂点を持つが、ここでは便宜上２つの頂点を持つものである。
【００３７】
この略長円錐面の頂面は長軸ＡＸ方向から見て傾斜した１つの平面となっている。このためこれら底面と頂面で切った長円錐面からなる表布半体１２Ｂを折り返せば、長軸ＡＸを挟んで一側に長さｑの高い山の折り目が、他側に長さｑの低い山の折り目ができる。
【００３８】
２枚の表布半体１２Ｂを、高い山側同志と低い山側同志とをそれぞれ重ねて縫合することによって図１２に示すようなクッション１０Ｂができる。すなわち長軸ＡＸと平行で長さがｐの最小径部ｍと最大径部Ｍとを有する枕１０Ｂとなる。このクッション１０Ｂを枕として用いれば、最小・最大径部ｍ、Ｍは弧状でなく直線状になるから、頭の安定性は一層良好となり、頭を左右へ一層回し易くなる。また座布団やソファとして用いれば、腰の前屈姿勢を小さくして楽な姿勢で着座でき、腰を一層安定して保持できる。
【００４１】
【他の実施態様】
図１４は他の実施態様を示す図であり、環状クッション１０Ｄの開口２０内に別の補助クッション３０を着脱可能に嵌め込んだものである。この補助クッション３０は盤状であり、その上面は開口２０に嵌め込んだ時に環状クッション１０Ｄの最小径部ｍよりも低くなる。
【００４２】
ここに用いる環状クッション１０Ｄとしては、図１〜９で説明した円環状のクッション１０，図１０，１１で説明した楕円環状のクッション、図１２，１３で説明した長円環状のクッション１０Ｂを用いることができる。補助クッション３０の外径は使用する環状クッションの開口２０形状に適合させて決めればよい。
【００４３】
この補助クッション３０を用いることにより、開口２６内への頭や腰の過大や落ち込みを規制することができる。例えば枕として用いる場合には、開口２０を大きくして最小径部ｍで使用者の首の後ろ（うなじ、えりくび）を支持しながら、後頭部をこの補助クッションで支えるようにして使用することができる。このため環状クッション１０Ｄの直径を大きくでき、一層ゆったりとリラックスした感じでの就寝が可能になる。また径の大きいクッション１０であれば、クッション１０Ｄを回して好みの高さの位置を選んで用いることができ、便利である。
【００４４】
【他の実施態様】
図１５は環状クッション１０Ｅに好適なクッションカバー４０を示す図である。このクッションカバー４０は、環状クッション１０Ｅが断面略円形でかつ開口２０を有するという特定の性質を専ら利用して、円錐面などで形成したものである。
【００４５】
すなわち環状クッション１０Ｅとして前記図１〜９に説明した円環状のクッション１０を用いる場合には、図１７（Ａ）に示すように円錐面で形成する。また図１０，１１に説明した楕円環状のクッションを用いる場合には楕円錐面を用いる。同様に図１２，１３で説明した長円環状のクッション１０Ｂなら長円錐面を用いる。ここにクッションカバー４０の開口形状および開口縁長は、それぞれ環状クッションの外周形状および外周長にほぼ等しい。
【００４６】
このクッションカバー４０は、その開口縁を環状クッション１０Ｅの外周縁に被せ、頂点を開口２０内に落し込むことにより使用される。この時クッションカバー４０は円錐面などで作られるから、クッション１０Ｅの外周縁の丸味に沿った形状になってクッション１０Ｅに被せられる。またクッション１０Ｅの開口２０内にはクッションカバー４０の頂部側が寄せ集められて入るが、この部分に皺が寄っても使用上全く不都合はない。ここにクッションカバー４０の開口縁に沿ってゴム紐や紐を通し、開口縁をクッション１０Ｅに被せてから絞ることにより、クッションカバー４０をクッション１０Ｅの外周縁にしっかりと保持できる。
【００４７】
以上の各実施態様では、一対の表布半体１２、１２Ａ、１２Ｂを同一形状としたものであるから、環状部分の断面形状を円形に近付けることが容易になる。しかし本発明は一方の表布半体を平面状にしたり、截頭円錐面などとしても良い。また最小径部ｍと最大径部Ｍとの両方を所定長さ連続させているが、これらの一方のみを所定長さ連続させるものであってもよい。
【００４８】
【発明の効果】
請求項１の発明は以上のように、略截頭円錐面からなる一対の表布半体の底面の開口縁同志および頂面の開口縁同志を縫合し内部に弾性材を充填して円環状とする一方、少くとも一方の表布半体の略截頭円錐面の最短母線長の部分および最長母線長の部分をほぼ対称に位置させ、これらの少くとも一方の部分を周方向に所定長さ連続させたものであるから、環状部分の最小または最大径部が所定長さ連続することになる。
【００４９】
このためこのクッションを使用する際に最小または最大径部が水平になり、枕として用いた場合にここに頭を載せて頭を安定させることができる。また頭を左右に回し易くなり、使用感が向上する。さらにこの枕は開口を有するから頭部にかく汗を効率良く発散させることができるばかりでなく、この開口を利用して物干杆やフックに掛けることにより、乾したり収納することができて便利である。
【００５０】
またこのクッションを座布団やソファとして用いた場合には、所定長さ連続する最小径部または最大径部に大腿部あるいは腰の背面を支持して着座でき、前と後で高さが異なることを利用して適度な前屈姿勢をとることが可能になり、長時間の着座も苦痛にならなくなる。ここに最小・最大径部が所定長さ連続するから、着座姿勢に左右方向の規制が加わらず、楽に着座できることになる。
【００５１】
少くとも一方の略截頭円錐面は、最短母線長の部分および最長母線長の部分を共に所定長さ連続させることができ、この場合は一層頭の安定性が向上し、使用感が向上する（請求項２）。このようなクッションは、略截頭円錐面の底面を平坦にし、頂面が周方向のほぼ対称位置でこの底面に平行かつ高さが異なる２つの平面を含むように形成することにより作ることができる（請求項３）。
【００５２】
表布半体は略截頭円錐面に代えて、略截頭楕円錐面を用いたり、略截頭長円錐面を用いることもできる（請求項４，６）。これらの場合に、最小・最大径部を長くすることができ、左右に長い大型の枕を作る場合に都合がよい。この場合最短母線長の部分と最長母線長の部分とを共に底面の長軸方向にほぼ沿わせて所定長さ連続させるのがよい（請求項５）。
【００５３】
前記した種々の形状の環状クッションには、開口に補助クッションを着脱可能に嵌め込んでおくことができる（請求項７）。この補助クッションを用いることにより、頭の後ろや腰が開口内に深く落ち込むのを防ぎ使用感を一層向上させることができる。
【００５４】
請求項８の発明によれば、円環状のクッションに好適なクッションカバーが得られる。同様に請求項９，１０の発明によれば、楕円環状、長円環状のクッションにそれぞれ好適なクッションカバーが得られる。
【図面の簡単な説明】
【図１】この発明の一実施態様の斜視図
【図２】同じく平面図
【図３】同じく正面図
【図４】右側面図
【図５】表布半体の形状を示す斜視図
【図６】その縫合方法の説明図
【図７】枕の使用状態を示す図
【図８】表布半体の展開図
【図９】その直線Ｌの長さを求める方法の説明図
【図１０】他の実施態様の表布半体を示す図
【図１１】図１０におけるＡ矢視およびＢ矢視の断面図
【図１２】他の実施態様を示す斜視図
【図１３】同じく表布半体を示す斜視図
【図１４】他の実施態様を示す図
【図１５】クッションカバーを示す図
【符号の説明】
１０、１０Ｂ、１０Ｄ、１０Ｅクッション
１２、１２Ａ、１２Ｂ表布半体
１４切欠き部
１６截頭円錐体
１８弾性材
２０開口
３０補助クッション
４０クッションカバー
Ｍ最大径部
ｍ最小径部
ＡＸ長軸
ｏ頂点
ｐ母線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cushion formed in an annular shape and used as a pillow, a cushion, or a sofa, and a cushion cover used for the cushion.
[0002]
[Prior art]
Conventionally, square and round cushions with cushion materials inside are widely used as pillows, cushions or sofas. In the pillow having such a shape, the entire back surface of the sleeping person's head is in close contact with the upper surface of the pillow.
[0003]
For this reason, there is a problem that sweat, especially in the summer, is bad and the hair is hurt. It is also said that when an infant is laid down, if the head is turned upside down, the back of the head hits a flat pillow and flattenes, and the shape of the head deteriorates. In addition, when sitting on a floor with a cushion or sofa of this shape, the seat occupant takes a heavy burden on the hips and takes a long forward sitting posture, taking a strong forward bending posture. Sometimes with great pain. Furthermore, this cushion usually has a problem that the waist stability is poor when seated because it is usually high near the center.
[0004]
Therefore, it is conceivable to make the pillows, cushions or sofas annular. For example, it is conceivable to use an annular cushion proposed by the same applicant as a pillow (Japanese Patent Application No. 9-2729). When this annular cushion is used for a pillow, a space is formed in the annular portion, so that the air permeability is good and the head is not stuffy with sweat. In addition, since the central space is depressed, the head shape of the infant is not deteriorated. On the other hand, when this annular cushion is used as a cushion or a sofa, since there is an opening near the center, it is possible to stabilize the waist by dropping the waist into this opening.
[0005]
[Problems of conventional technology]
However, this proposed cushion has a constant diameter of the annular portion or continuously changes so that the diameter of the symmetrical position is maximum and minimum. For this reason, when this was used for the pillow, there existed a problem that stability of a head worsened or it was difficult to turn a head to right and left.
[0006]
That is, when the diameter of the annular portion is constant over the entire circumference, the height at which the neck of the back of the head hits and the height at which the head hits are the same, so the sitting of the head is poor and the usability is poor. If the diameter of the annular portion changes continuously, it is difficult to turn the head left and right at the minimum diameter portion, and the head becomes unstable at the maximum diameter portion. For this reason, the sitting of the head was similarly bad and the feeling of use was worsened.
[0007]
Similarly, when this annular cushion is used for a cushion or a sofa, the waist enters deeply into the opening near the center and the forward bending posture becomes even stronger. For this reason, it has been difficult to relieve the pain associated with sitting for a long time. In the case of an annular cushion with the diameter of the annular part continuously changed, the largest diameter part is used so that the back side of the waist or the vicinity of the lumbar spine hits. In this case, both sides of the largest diameter part are used. Because of the low, the support on the back side of the waist or in the vicinity of the lumbar spine becomes unstable. Further, the thigh side is placed on the minimum diameter portion, but since both sides of the minimum diameter portion are gradually increased, the stability of the thigh is deteriorated.
[0008]
OBJECT OF THE INVENTION
The present invention has been made in view of such circumstances, and when used as a pillow, the stability of the head is good, the operation of turning the head to the left and right is easy, and the feeling of use is excellent, and when used as a cushion or sofa. It is a first object of the present invention to provide an annular cushion that can relieve forward bending posture, relieve pain associated with sitting, and stably support the waist. A second object is to provide a cushion cover applied to the annular cushion.
[0009]
[Structure of the invention]
According to the present invention, the first object is to sew together the opening edges of the bottom surface and the top edges of the pair of outer half halves, each having a substantially frustoconical surface, and fill the inside with an elastic material. And the shortest busbar length portion and the longest busbar length portion of the substantially frustoconical surface forming at least one outer cloth half are arranged at substantially symmetrical positions, and at least one of them is arranged around the circumference. This is achieved by an annular cushion characterized in that a predetermined length is continued in the direction.
[0010]
Here, the pair of front cloth halves may be formed identically or symmetrically, or one of the front cloth halves may be formed by a frustoconical surface having a constant busbar length. If the shortest bus length part and the longest bus length part are provided for a predetermined length in a substantially symmetrical position, the part where the head hits on the scruff side and the top of the head becomes flat when used as a pillow. In addition, when used as a cushion or a sofa, it is more preferable because both the back side of the waist and the part where the thigh hits are flat.
[0011]
Such a cushion can be made by flattening the bottom surface of the substantially frustoconical surface so that the top surface includes two planes parallel to the bottom surface and having different heights at substantially symmetrical positions in the circumferential direction. it can.
[0012]
Instead of forming the front cloth half with a substantially truncated conical surface, a substantially truncated elliptical conical surface may be used, or a substantially truncated long conical surface may be used. In this case, Ru can be the bus length to be continuously substantially along the longitudinal axis of the bottom surface of the elliptical conical surface or long conical face the longest or shortest.
[0013]
In these annular cushions, the auxiliary cushion can be fitted into the opening near the center. In this case, it is possible to prevent the neck from bending too much when the head goes deeply into the opening and sleeping, or the waist becomes bent and the forward bending posture of the waist is strengthened, thereby increasing pain.
[0014]
The second object is a cushion cover used for an annular annular cushion in which the outer half of the cloth is formed with a frustoconical surface, and the circumferential surface of the opening edge of the bottom surface is substantially equal to the outer circumferential length of the annular cushion. It can be achieved by a cushion cover characterized by being formed of.
[0015]
Of course, the shape of the cushion cover is changed according to the shape of the half of the outer cloth. For example, when the outer half is formed with a substantially truncated elliptical cone surface, it is an elliptical cone surface , and when it is formed with a substantially truncated elliptical cone surface, it is a long cone surface . If a rubber string is passed through the opening edge of the cushion cover or the string is passed through the cushion cover, the cover edge can be prevented from falling off the cushion by squeezing after covering the outer edge of the annular cushion. .
[0016]
[Action]
An annular, elliptical or oval cushion has a minimum / maximum thickness at the part corresponding to the minimum / maximum part of the busbar length, and the minimum / maximum part has a predetermined length. The Head and waist for this is stabilized.
[0017]
When used for a pillow, it is easy to turn the head left and right. Here, the head neck side hits the portion with the smallest thickness, and the top portion of the head hits the portion with the largest thickness, so that the head can be supported stably. When using for cushions and sofas, the thigh is placed on the smallest diameter part and the waist is supported by the largest diameter part. . If a disc-shaped auxiliary cushion is fitted in the central opening, the head and waist do not fall deeply into the opening, and the neck and waist can be prevented from becoming excessively bent.
[0018]
The cushion cover is used with its opening edge covered with the outer peripheral edge of the annular cushion. Since the cushion cover is made on the conical surface, elliptical conical surface, long conical surface, pyramid surface, etc. corresponding to the shape of the annular cushion, it adheres well without generating wrinkles particularly on the outer peripheral surface of the annular cushion, The apex side can be stored in the opening portion of the annular cushion.
[0019]
Embodiment
1 is a perspective view of one embodiment of the present invention, FIG. 2 is also a plan view, FIG. 3 is also a front view, FIG. 4 is a right side view, and FIG. 5 is a perspective view showing the shape of a half cloth. FIG. 7 is an explanatory view of the suturing method, and FIG. 7 is a view showing a use state as a pillow. FIG. 8 is a developed view of the front cloth half, and FIG. 9 is an explanatory view of a method for obtaining the length of the straight line L.
[0020]
The cushion 10 is 2R outer diameter (diameter), inside diameter (diameter) 2r, circular [Phi _m in at [Phi _M, minimum partial m portion diameter maximum annular portion M (Fig. 1 and 2) Suppose that In this case, the front cloth half 12 is cut as shown in FIG.
[0021]
In FIG. 8, the diameter (radius) of the outer periphery of the front cloth half 12 is R ₀ , and the angle of the notch portion 14 is θ ₀ . The inner peripheral diameter (radius) corresponding to the portion m of the smallest diameter (Φ _m ) of the annular portion is R ₁ and the angle is θ ₁ . The inner peripheral diameter (radius) corresponding to the portion M of the maximum diameter (Φ _M ) is R ₂ and the angle is θ ₂ .
[0022]
If the cutout portion 14 of the front cloth half 12 is stitched, a substantially truncated cone 16 shown in FIG. In this case, the bottom surface of the cone 16 is circular, and the outer peripheral length thereof is equal to the outer peripheral length of the pillow 10 shown in FIG. 2, and the outer peripheral length of the top surface of the cone 16 is the inner diameter of the second pillow 10. Since it is equal to the circumference, the following equation is obtained.
[0023]
2πR = 2πR ₀ × (360−θ ₀ ) / 360
_{_{2πr = 2πR 1 × θ 1/}} 360 + 2πR 2 × θ 2/360 + 2L
R ₀ −R ₂ = πΦ _M / 2
R ₀ −R ₁ = πΦ _m / 2
[0024]
Here, L corresponds to a portion that continuously connects the maximum diameter portion M and the minimum diameter portion m, that is, the portion N in FIGS. 1 and 2, and is represented by a straight line on the developed view of FIG. Can be obtained as follows. That is, in the case of the triangle ABC shown in FIG.
[0025]
^{_{^{L 2 = R 1 2 + R}}} 2 2 -2R 1 · R 2 · COS (θ 3/2)
[0026]
On the other hand, for θ ₀ , θ ₁ , θ ₂ , and θ ₃ , θ ₀ + θ ₁ + θ ₂ + θ ₃ = 360 ° holds, and the ratio of the lengths of the maximum and minimum diameter portions M and m and the portion N therebetween Based on the above, the ratio of θ ₁ , θ ₂ , θ ₃ is obtained. Therefore, by solving the simultaneous equations consisting of the above five expressions and the conditional expressions relating to these θ ₀ , θ ₁ , θ ₂ , and θ ₃ , R ₀ , R ₁ , R ₂ , θ ₀ , θ ₁ , θ ₂ , θ ₃ can be obtained. Using this result, two front cloth half bodies 12 shown in FIG. 8 are cut.
[0027]
The front cloth half 12 can be made into a truncated cone 16 as shown in FIG. 5A, that is, a cone 16 having an open bottom and top by sewing the notch 14 together. As shown in FIG. 6A, the top surface of the conical body 16 has a shape in which two planes x and y having different heights from the bottom surface and symmetrical positions are connected by an inclined surface Z.
[0028]
The two front cloth halves 12 are folded back between the bottom surface and the top surface. That is, the extended line passes through the periphery of the bottom surface and the top surface, and is folded in the middle of the generatrix p passing through the apex o of the cone, as shown in FIG. As a result, the two outer cloth halves 12 have an annular mountain shape or an annular groove shape, and the outer peripheral edges of both outer cloth halves 12 and 12 are stitched together. Similarly, the inner peripheral edges are sewn with a part remaining. At this time, the outer half halves 12 and 12 are aligned so that the portions corresponding to the maximum and minimum diameter portions M and m, that is, the portions of the longest busbar length and the portions of the shortest busbar length face each other. .
[0029]
After the suture body is turned over from the unsewn portion (opening portion) on the inner periphery, as shown in FIG. 6B, the inside is filled with an elastic material 18 such as cotton or urethane foam. And what is necessary is just to sew the unstitched part of an inner periphery. In this way, each of the front cloth halves 12 and 12 is sewn in an annular chevron shape or an annular groove shape, so that when the elastic material 18 is filled to make the annular portion substantially circular (see FIG. 6B). The force in the direction of forcibly opening the stitched portion does not act, and no wrinkles occur on the inner and outer peripheral edges. As a result, the finish of the peripheral edge of the finished product 10 is good and beautiful and smooth.
[0030]
Further, when the cushion 10 is used as a pillow, as shown in FIG. 7, the sleeping person's head crawls to the smallest diameter portion m (corresponding to the portion of the shortest busbar length) on the neck side and the largest diameter portion M (longest length) (Corresponding to the bus length part). Here, since the minimum and maximum diameter portions m and M are continuous for a predetermined length in the circumferential direction, the head is stably supported. Moreover, it becomes easy to turn the head from side to side.
[0031]
When it is used as a cushion or a sofa, it is seated with the minimum diameter portion m in front and the maximum diameter portion M behind. Since the minimum diameter part m on which the thigh is placed and the maximum diameter part M that supports the rear side of the waist are continuous for a predetermined length, the forward bending posture can be weakened and a stable posture can be stably seated. Further, since the cushion 10 has a circular opening 20 near the center, the sweat can be promoted through the opening 20 and the feeling of use is good. The opening 20 can be conveniently hung on a clothes rack or can be stored by hanging the opening 20 on a hook.
[0032]
[Other Embodiments]
FIG. 10 is a view showing a front cloth half 12A of another embodiment, and FIG. 11 is a cross-sectional view taken along arrow A and a cross-sectional view taken along arrow B. In this embodiment, the outer half body 12A is formed of an elliptical conical surface.
[0033]
That is, the front cloth half body 12A has an elliptical bottom surface, and the symmetrical position corresponds to the minimum diameter portion m and the maximum diameter portion M across the major axis AX of the bottom surface. Here, the portions corresponding to the minimum and maximum diameter portions m and M of the front cloth half body 12A have the same bus bar length within a predetermined length range in the circumferential direction.
[0034]
For this reason, if two surface cloth halves 12A having the same shape are overlapped and stitched so that the minimum and maximum diameter portions m and M face each other, the minimum and maximum diameters are long along the long axis AX direction of the bottom ellipse. Portions m and M can be formed. According to this embodiment, the completed pillow has an elliptical annular shape, and the minimum and maximum diameter portions m and M can be made longer in the direction of the long axis AX than the annular cushion shown in FIGS. For this reason, if it is used for a pillow, the stability of the head will be further improved, and the head will be easier to turn left and right. In addition, if it is used for a cushion or a sofa, the waist can be relaxed and the posture can be relaxed and the waist can be held more stably.
[0035]
[Other Embodiments]
FIG. 12 is a perspective view showing still another embodiment, and FIG. 13 is a perspective view showing a front cloth half body 12B. The cushion 10B is formed in an oval shape.
[0036]
Here, the front cloth half body 12B has an oval bottom surface. This bottom surface has a shape in which a semicircle is continuous on both sides of a rectangle having a length q, and is a substantially long conical surface having a shape in which a cone divided into two is connected to both sides of a triangular column having a length q which is tilted sideways. Yes. The correct long cone has one vertex, but here it has two vertices for convenience.
[0037]
The top surface of the substantially long conical surface is a single flat surface that is inclined when viewed from the direction of the long axis AX. For this reason, if the front cloth half body 12B made of the long conical surface cut at the bottom surface and the top surface is folded back, a crease having a high length q on one side and a length q on the other side across the long axis AX. There is a low mountain crease.
[0038]
A cushion 10B as shown in FIG. 12 can be obtained by stitching the two upper cloth halves 12B together with the high mountain side comrades and the low mountain side comrades. In other words, the pillow 10B has a minimum diameter portion m and a maximum diameter portion M that are parallel to the long axis AX and have a length p. When this cushion 10B is used as a pillow, the minimum and maximum diameter portions m and M are not arcuate but linear, so that the stability of the head is further improved and the head can be more easily turned left and right. Moreover, if it is used as a cushion or a sofa, the waist can be seated in a comfortable posture with a reduced forward bending posture, and the waist can be held more stably.
[0041]
[Other Embodiments]
FIG. 14 is a view showing another embodiment, in which another auxiliary cushion 30 is detachably fitted in the opening 20 of the annular cushion 10D. The auxiliary cushion 30 has a disk shape, and its upper surface is lower than the minimum diameter portion m of the annular cushion 10D when fitted into the opening 20.
[0042]
The cyclic cushion 10D used herein are used cushion 10 annular described in FIGS. 1-9, elliptical ring cushion described in FIGS. 10 and 11, the cushion 10 B oblong annular described in FIGS. 12 and 13 be able to. The outer diameter of the auxiliary cushion 30 may be determined according to the shape of the opening 20 of the annular cushion to be used.
[0043]
By using this auxiliary cushion 30, it is possible to regulate excessive or depressed head or waist into the opening 26. For example, when used as a pillow, the opening 20 should be enlarged and the back of the user's neck (nape, collar) should be supported with the smallest diameter part m while the back of the head is supported by this auxiliary cushion. Can do. For this reason, the diameter of the annular cushion 10D can be increased, and sleeping with a more relaxed feeling becomes possible. Further, if the cushion 10 has a large diameter, the cushion 10D can be turned to select a position at a desired height, which is convenient.
[0044]
[Other Embodiments]
FIG. 15 is a view showing a cushion cover 40 suitable for the annular cushion 10E. The cushion cover 40 is formed by a conical surface or the like by exclusively utilizing a specific property that the annular cushion 10E has a substantially circular cross section and has an opening 20.
[0045]
That is, when the annular cushion 10 described in FIGS. 1 to 9 is used as the annular cushion 10E, it is formed with a conical surface as shown in FIG. When the elliptical annular cushion described in FIGS. 10 and 11 is used, an elliptical cone surface is used. Similarly there use a long conical surface if oval annular cushion 10B described in FIG. 12 and 13. Here, the opening shape and the opening edge length of the cushion cover 40 are substantially equal to the outer peripheral shape and the outer peripheral length of the annular cushion, respectively.
[0046]
The cushion cover 40 is used by covering the opening edge of the cushion cover 40 with the outer peripheral edge of the annular cushion 10 </ b> E and dropping the apex into the opening 20. At this time, since the cushion cover 40 is made of a conical surface or the like, the cushion cover 40 is covered with the cushion 10E in a shape along the roundness of the outer peripheral edge of the cushion 10E. Further, the top side of the cushion cover 40 is gathered into the opening 20 of the cushion 10E, but there is no inconvenience in use even if wrinkles approach this portion. The cushion cover 40 can be firmly held on the outer peripheral edge of the cushion 10E by passing a rubber string or a string along the opening edge of the cushion cover 40, and then squeezing after covering the opening edge on the cushion 10E.
[0047]
In each of the above embodiments, the pair of front cloth halves 12, 12 </ b> A, and 12 </ b> B have the same shape, so that the cross-sectional shape of the annular portion can be easily approximated to a circle. However, in the present invention, one half of the top cloth may be flat or a frustoconical surface. Further, although both the minimum diameter portion m and the maximum diameter portion M are continuous for a predetermined length, only one of them may be continuous for a predetermined length.
[0048]
【The invention's effect】
In the first aspect of the present invention, as described above, the opening edges of the bottom half and the top opening edges of the pair of outer half halves having a substantially frustoconical surface are stitched together and filled with an elastic material to form an annular shape. On the other hand, the portion of the shortest busbar length and the portion of the longest busbar length of the substantially frustoconical surface of at least one of the front cloth halves are positioned approximately symmetrically, and at least one of these portions has a predetermined length in the circumferential direction. Therefore, the minimum or maximum diameter portion of the annular portion continues for a predetermined length.
[0049]
For this reason, when using this cushion, the minimum or maximum diameter portion becomes horizontal, and when used as a pillow, the head can be placed on the head to stabilize the head. Moreover, it becomes easy to turn the head from side to side, and the feeling of use is improved. Furthermore, since this pillow has an opening, it can not only efficiently shed sweat on the head, but also can be dried and stored by hanging on a clothesline or hook using this opening. Convenient.
[0050]
In addition, when this cushion is used as a cushion or a sofa, it can be seated by supporting the back of the thigh or waist on the minimum or maximum diameter part that continues for a predetermined length, and the height differs before and after. This makes it possible to take a proper forward bending posture, so that sitting for a long time will not be painful. Since the minimum and maximum diameter portions are continuous for a predetermined length, the seating posture is not restricted in the left-right direction, and the user can sit comfortably.
[0051]
At least one of the frustoconical surfaces can have both the shortest busbar length portion and the longest busbar length portion continuous for a predetermined length. In this case, the stability of the head is further improved and the usability is improved. (Claim 2). Such a cushion can be made by flattening the bottom surface of the substantially frustoconical surface so that the top surface includes two planes parallel to the bottom surface and having different heights at substantially symmetrical positions in the circumferential direction. (Claim 3).
[0052]
The front cloth half can be replaced with a substantially truncated conical surface by using a substantially truncated elliptical conical surface or a substantially truncated long conical surface (claims 4 and 6). In these cases, the minimum and maximum diameter portions can be lengthened, which is convenient when making a large pillow that is long on the left and right. In this case, it is preferable that the shortest busbar length portion and the longest busbar length portion are both continuous along a major axis direction of the bottom surface for a predetermined length.
[0053]
An auxiliary cushion can be detachably fitted into the opening in the above-described various-shaped annular cushions (claim 7 ). By using this auxiliary cushion, it is possible to prevent the back of the head and the waist from deeply falling into the opening and to further improve the feeling of use.
[0054]
According to the invention of claim 8 , a cushion cover suitable for an annular cushion can be obtained. According to the same manner the invention of claim 9, elliptical ring, suitable cushion cover respectively in an oval ring-shaped cushion is obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of the present invention. FIG. 2 is a plan view. FIG. 3 is a front view. FIG. 4 is a right side view. 6] Explanatory diagram of the stitching method [FIG. 7] Diagram showing the use state of the pillow [FIG. 8] Exploded view of the front cloth half [FIG. 9] Explanatory diagram of the method for obtaining the length of the straight line L [FIG. FIG. 11 is a sectional view taken along arrows A and B in FIG. 10. FIG. 12 is a perspective view showing another embodiment. FIG. FIG. 14 is a perspective view showing another embodiment. FIG. 15 is a view showing a cushion cover.
10 , 10 B, 10D, 10E Cushion 12, 12A, 12 B Table cloth half body 14 Notch portion 16 Frustum cone 18 Elastic material 20 Opening 30 Auxiliary cushion 40 Cushion cover M Maximum diameter portion m Minimum diameter portion AX Length Axis o Vertex p Bus

Claims

A pair of outer half halves made of a substantially frustoconical surface are formed into an annular shape by stitching the openings at the bottom and the openings at the top, and filling the inside with an elastic material, and at least one of the faces The shortest busbar length portion and the longest busbar length portion of the substantially frustoconical surface forming the cloth half are arranged at substantially symmetrical positions, and at least one of them is continuous for a predetermined length in the circumferential direction. An annular cushion to do.

2. The annular cushion according to claim 1, wherein at least one of the substantially frustoconical surfaces has the shortest busbar length portion and the longest busbar length portion both continuous for a predetermined length.

The at least one of the substantially frustoconical surfaces has a flat bottom surface and a top surface including two planes that are substantially symmetrical in the circumferential direction and are parallel to the bottom surface and different in height. Annular cushion.

A pair of outer half halves of a substantially truncated elliptical conical surface are substantially aligned with the major axis direction of the bottom half, and the openings at the bottom and the openings at the top are stitched together and filled with an elastic material to form an elliptical ring. A portion of the shortest bus bar length and a portion of the longest bus bar length of the substantially truncated elliptical conical surface forming at least one outer cloth half are arranged substantially symmetrically with respect to the major axis, and at least of these An annular cushion characterized in that one side is made to continue for a predetermined length substantially along the long axis direction.

5. The annular cushion according to claim 4, wherein at least one of the substantially truncated elliptical conical surfaces has a portion of the shortest busbar length and a portion of the longest busbar length that are continuous for a predetermined length substantially along the long axis direction.

The bottom surface of a pair of outer half halves made of a substantially truncated long conical surface with an oval bottom is made to coincide with the major axis direction of the bottom surface, and the opening edges of the bottom surface and the opening edges of the top surface are stitched together to form an elastic material. And forming the longest and shortest generatrix lengths on two sides parallel to the major axis of the bottom surface of the substantially truncated long conical surface forming at least one front cloth half. An annular cushion characterized by that.

The annular cushion according to any one of claims 1 to 6 , further comprising an auxiliary cushion fitted into an opening near a center.

The cushion cover used for the annular cushion according to claim 1, 2 or 3, wherein the circumferential length of the opening edge of the bottom surface is formed by a conical surface substantially equal to the outer circumferential length of the annular cushion. Cushion Cover.

The cushion cover used for the annular cushion according to claim 4 or 5, characterized in that the opening shape and the opening edge length of the bottom surface are formed by an elliptical conical surface substantially equal to the outer periphery shape and the outer periphery length of the annular cushion, respectively. Cushion cover.

The cushion cover used for the annular cushion according to claim 6, wherein the opening shape and the opening edge length of the bottom surface are each formed by a long conical surface substantially equal to the outer periphery shape and the outer periphery length of the annular cushion. cover.