JP3706525B2

JP3706525B2 - Rotating connection structure

Info

Publication number: JP3706525B2
Application number: JP2000122227A
Authority: JP
Inventors: 伸市郎越川
Original assignee: Sugatsune Kogyo Co Ltd
Current assignee: Sugatsune Kogyo Co Ltd
Priority date: 2000-04-24
Filing date: 2000-04-24
Publication date: 2005-10-12
Anticipated expiration: 2020-04-24
Also published as: JP2001303832A

Description

【０００１】
【発明の属する技術分野】
この発明は、携帯電話の送話部と受話部のような二つに物品を回転可能に連結するための回転連結構造に関する。
【０００２】
【従来の技術】
従来、携帯電話の送話部と受話部とを回転可能に連結する場合には、送話部および受話部にそれぞれ設けられた支持筒を互いの軸線を一致させて一列に並べる次に、一方の支持筒から他方の支持筒にヒンジ体を挿入する。ヒンジ体は、回転可能に連結された一対のヒンジ体を有しており、一方のヒンジ体は一方の支持筒に回転不能に嵌合され、他方のヒンジ体は、一方の支持筒を貫通して他方の支持筒に回転不能に嵌合される。これにより、送話部と受話部とをが回転可能に連結するものである。
【０００３】
ところで、ヒンジ体は支持筒から抜け止めする必要がある。そこで、従来のヒンジ体では、一対のヒンジ部材の互いに離れた側の端部に係合部をそれぞれ設け、各係合部を各支持筒の互いに離れた側の端部にそれぞれ係合させることにより、ヒンジ体が支持筒から抜けるのを防止していた。
【０００４】
【発明が解決しようとする課題】
しかしながら、上記のようにして抜け止めした場合には、第１、第２ヒンジ部材の長さ誤差および組立誤差が係合部間の距離の誤差として現われるとともに、一対の支持筒の長さ誤差、および組立誤差等がそれらの両端部間の寸法誤差として現われる。このため、係合部間の距離を支持筒の端部間の距離より長く設定せざるを得ず、その結果ヒンジ体と支持筒との間に軸線方向における大きなガタが発生し易いという問題があった。
【０００５】
【課題を解決するための手段】
この発明は、上記の問題を解決するために、二つの物品の各支持筒を互いに軸線を一致させて一列に並べ、一方の支持筒から他方の支持筒までヒンジ体を挿入することにより、上記二つの物品をヒンジ体を介して回転可能に連結する回転連結構造において、上記ヒンジ体が、上記一方の支持筒に回転不能に挿入される第１ヒンジ部材と、この第１ヒンジ部材に回転可能に連結され、かつ上記一方の支持筒を貫通して上記他方の支持筒に回転不能に挿入される第２ヒンジ部材とを有しており、上記第１ヒンジ部材の一端部と他端部とには、上記一方の支持筒の両端部にそれぞれ係合することによって上記第１ヒンジ部材を上記一方の支持筒部から抜け止めする係合部がそれぞれ設けられ、上記二つの支持筒の互いに隣接する端面の少なくとも一方には、上記他方の支持筒側の当接部を収容する収容凹部が形成されていることを特徴としている。
【０００６】
この場合、上記他方の支持筒側の当接部は、上記支持筒の径方向内側へ向って弾性的に変位可能とされ、径方向内側へ弾性変位して上記一方の支持筒の内部を通過した後、径方向外側へ弾性的に復帰変位することにより、上記一方の支持筒の上記他方の支持筒に隣接した端部に係合することが望ましい。
上記一方の支持筒の内周面には、その軸線方向に沿って延び、上記第１ヒンジ部材のキー溝に嵌り込むことによって第１ヒンジ部材の回転を阻止するキー部が、上記一方の支持筒の上記ヒンジ体を挿入する側の端面から離れて配置形成され、上記第１ヒンジ部材の上記第２ヒンジ部材から離れた端部には上記一方の支持筒に嵌合することによって支持筒を遮蔽する化粧板部が形成され、この化粧板部が、上記キー部に突き当たることによって上記第１ヒンジ部材の上記一方の支持筒側から他方の支持筒へ向う方向への移動を阻止する係合部として兼用され、上記化粧板部の厚さが、上記支持筒の端面と上記キー部との間の間隔とほぼ同一に設定されていることが望ましい。
上記ヒンジ体が、第１および第２ヒンジ部材の軸線上に配置され、かつ第１、第２ヒンジ部材を回転可能にかつ軸線方向へ所定範囲移動可能に連結する連結軸と、上記第１、第２ヒンジ部材を上記軸線方向へ互いに押し付ける付勢手段とをさらに備え、上記第１、第２のヒンジ部材の上記付勢手段によって押し付けられる当接面には、上記第１、第２ヒンジ部材を所定の回転位置で節度をもって係脱可能に係止する係止機構が設けられていることが望ましい。
上記連結軸の一端部が第２ヒンジ部材に軸線方向へ移動不能に連結され、上記連結軸の他端部が上記第１ヒンジ部材に軸線方向へ移動可能に連結され、上記第２ヒンジ部材が上記付勢手段により上記連結軸を介して上記第１ヒンジ部材側へ付勢されていることが望ましい。
上記第１ヒンジ部材の内部に収容空間が設けられ、この収容空間内に上記連結軸の他端部および上記付勢手段が収容されていることが望ましい。
上記付勢手段としてコイルばねが用いられ、このコイルばねが上記連結軸とほぼ同芯に配置されていることが望ましい。
【０００７】
【発明の実施の形態】
以下、この発明の一実施の形態について図１〜図１１を参照して説明する。なお、この実施の形態は、折りたたみ式携帯電話の送話部と受話部とを回転可能に連結する回転連結構造にこの発明を適用したものであるが、この発明は、携帯電話の送話部および受話部以外の二つの物品を回転可能に連結する他の回転連結構造にも適用可能である。
【０００８】
まず、この発明の回転連結構造によって回転可能に連結される携帯電話の送話部Ａと受話部Ｂとについて説明すると、図４および図５に示すように、送話部Ａの受話部Ｂ側の端部には、図５の左右方向に離れた一対の支持筒ａ１（左側の支持筒のみ図示）が互いの軸線Ｌを一致させて設けられている。受話部Ｂにも一対の支持筒ｂ１（一方のみ図示）が設けられている。一対の支持筒ｂ１，ｂ１は、それぞれ支持筒ａ１，ａ１に隣接するようにしてそれらの間に配置されており、軸線Ｌ方向において隣接する支持筒ａ１，ｂ１が一組をなしている。そして、後述するように、各組の支持筒ａ１，ｂ１にヒンジ体１が挿通されることにより、支持筒ａ１，ｂ１が回転可能に連結され、ひいては送話部Ａと受話部Ｂとが回転可能に連結されるようになっている。
【０００９】
図５に示すように、支持筒ａ１の内周面には、その軸線Ｌ方向へ延びるキー部ａ２が設けられている。この場合、キー部ａ２は周方向に１８０°離れて二つ形成されているが、一つだけ形成してもよい。キー部ａ２は、支持筒ａ１の外側（支持筒ｂ１から離れる側、つまり左側）の端面から離れて配置されている。支持筒ｂ１の内径は、後述するように、ヒンジ部材３が支持筒ａ１を通り抜けて支持筒ｂ１に挿入される関係上、支持筒ａ１の内径と同等以下に設定されている。支持筒ｂ１の内周面の外側の端部（支持筒ａ１側の端部）には、環状をなす収容凹部ｂ２が形成されている。また、支持筒ｂ１の内周面には、キー部ｂ３が形成されている。キー部ｂ３は、状凹部ｂ２から内側へ若干離れて配置されている。キー部ｂ３は、キー部ａ２と同様に二つ形成されており、キー部ａ２と同一または若干大きいの断面形状を有している。しかも、キー部ｂ３は、送話部Ａと受話部Ｂとを所定の回転位置（この実施の形態では、図４に示す通話位置）に回転させたとき、キー部ａ２と周方向において同一位置に位置するように配置されている。
【００１０】
次に、支持筒ａ１，ｂ１を回転可能に連結するヒンジ体１について説明すると、図１〜図６に示すように、ヒンジ体１は、支持筒ａ１に回転不能に嵌合される第１ヒンジ部材２と、支持筒ｂ１に回転不能に嵌合される第２ヒンジ部材３を備えている。図７に示すように、一方の第１ヒンジ部材２は、ヒンジ半体２Ａ，２Ｂによって構成されており、他方のヒンジ部材（第２ヒンジ部材）３は、嵌合部材３Ａと係合部材３Ｂとによって構成されている。
【００１１】
第１ヒンジ部材２の一方のヒンジ半体２Ａは、図８に示すように、その一端部（図８において左端部）に円板状をなす化粧板部（係合部）２１を有している。この化粧板部２１の外径は、支持筒ａ１の内径とほぼ同一に設定されている。したがって、化粧板部２１は、図１〜図３に示すように、支持筒ａ１にほぼ隙間なく嵌合し、それによって支持筒ａ１の内部を遮蔽する。これにより、ヒンジ体１が外部から目視されないようにして、美観の向上が図られている。しかも、化粧板部２１の厚さは、支持筒ａ１の外側の端面からキー部ａ２までの距離と等しくなっている。したがって、化粧板部２１は、キー部ａ２に突き当たるまで支持筒ａ１に挿入すると、その端面が支持筒ａ１の外側の端面と同一平面上に位置する。これにより、より一層の美観の向上が図られている。
【００１２】
化粧板部２１の他端面（支持筒ｂ１側ｂの端面）の外周側部分には、化粧板部２１の軸線に沿って延びる一対の支持腕部２２，２２が周方向に１８０°離れて形成されている。各支持腕部２２，２２の外周面は、化粧板部２１の外周面と同一の外径を有し、化粧板部２１の外周面と同一の円柱面を構成している。支持腕部２２には、その先端面から化粧板部２１まで延びるキー溝２３が形成されている。このキー溝２３の幅は、そこにキー部ａ２を挿入することができるよう、キー部ａ２の幅と同一になっている。したがって、ヒンジ半体２Ａは、キー溝２３をキー部ａ２に位置合わせすることにより、支持筒ａ１に挿入可能であり、化粧板部２１がキー部ａ２に突き当たるまで挿入した状態では、キー部ａ２がキー溝２３に嵌り込むことにより、支持筒ａ１に回転不能に連結される。したがって、ヒンジ半体２Ａは、送話部Ａと一体に回転する。
【００１３】
支持腕部２２は、化粧板部２１がキー部ａ２に突き当たるまでヒンジ半体２Ａを支持筒ａ１に挿入したときに、その先端部が支持筒ａ１から支持筒ａ２側に突出するように、その長さが設定されている。そして、支持筒ａ１から突出した支持腕部２２の先端部外周面には、径方向外側に突出する係合突起（係合部）２２ａが形成されている。この係合突起２２ａの前部には、前方へ向うにしたがって径方向内側へ向うように傾斜するガイド面２２ｂが形成されている。このガイド面２２ｂは、ヒンジ半体２Ａを支持筒ａ１に挿入する際に、支持筒ａ１の内周面に突き当たり、支持腕部２２の先端部を径方向内側へ変位するように弾性変形させる。これによって、係合突起２２ａが径方向内側へ変位し、支持筒ａ１を通り抜けることができるようになっている。係合突起２２ａが支持筒ａ１を通過すると、支持腕部２２が元の状態に復帰する。これにより、係合突起２２ａが元の位置まで径方向外側へ変位する。すると、係合突起２２ａが支持筒ａ１の内側（支持筒ｂ１側）の端面にほぼ接触する。この状態では、化粧板部２１がキー部ａ２に突き当たることによってヒンジ半体２Ａの支持筒ａ１側から支持筒ｂ１側への移動を阻止し、係合突起２２ａが支持筒ａ１の内側の端面に突き当たることによって逆方向への移動を阻止する。これにより、ヒンジ半体２Ａが支持筒ａ１に抜け止めさらた状態で取り付けられ、ひいてはヒンジ体１全体が支持筒ａ１に抜け止めされている。
【００１４】
ここで、係合突起２２ａは、支持筒ａ１を通過すると支持筒ｂ１内に入り込むが、支持筒ｂ１の支持筒ａ１側の端部には収容凹部ｂ２が形成されており、この収容凹部ｂ２は係合突起２２ａを収容可能である。したがって、係合突起２２ａは、支持筒ｂ１の内周面に突き当たることなく、外周側へ変位することができる。
【００１５】
第１ヒンジ部材２の他方のヒンジ半体２Ｂは、図９に示すように、円板状をなすカム板部２５と、このカム板部２５の外周部からカム板部２５の軸線に沿って延びる一対の嵌合腕部２６，２６とを備えている。カム板部２５の中央部には、これを貫通する貫通孔２５ａが形成されている。一対の嵌合腕部２６，２６の外周面は、支持筒ｂ１の内径と同一になっている（この実施の形態では支持筒ａ１の内径とも同一になっている。）。したがって、ヒンジ半体２Ａの一対の支持腕部２２，２２の外径とも同一になっている。また、嵌合腕部２６の幅は、支持腕部２２，２２の間隔と同一になっている。したがって、嵌合腕部２６は、支持腕部２２，２２間にその先端側から挿入可能である。しかも、嵌合腕部２６の基側の両側部に切欠き部２６ａ，２６ａが形成されることにより、嵌合腕部２６の両側面の中央部には段部２６ｂ，２６ｂが形成されている。そして、図１および図６に示すように、嵌合腕部２６の先端が化粧板部２１に突き当たるまで嵌合腕部２６を支持腕部２２，２２間に挿入すると、段部２６ｂ，２６ｂに支持腕２２，２２の側面に形成された係止突起２２ｃ，２２ｃが係合する。これによって、嵌合腕部２６，２６が支持腕部２２，２２に連結固定され、ひいてはヒンジ半体２Ｂがヒンジ半体２Ａに一体に固定されている。ヒンジ半体２Ａ，２Ｂは、互いの軸線を一致させて固定されている。
【００１６】
互いに固定されたヒンジ半体２Ａ，２Ｂによって第１ヒンジ部材２が構成されているが、第１ヒンジ部材２の内部には、図２および図３に示すように、化粧板部２１およびカム板部２５を両端の底部とし、かつ支持腕部２２，２２および嵌合腕部２６を周壁部とする収容空間２Ｃが形成されている。
【００１７】
ヒンジ部材３の嵌合部材３Ａは、図１０に示すように、厚さが比較的厚い円板状をなしており、その外径は、支持筒ｂ１の内径とほぼ同一になっている。嵌合部材３Ａの中央部には、これを貫通する取付孔３１が形成され、外周面には一対のキー溝３２，３２が周方向に１８０°離れて形成されている。このキー溝３２には、キー部ｂ３が挿入可能である。したがって、嵌合部材３Ｂは、送話部Ａと受話部Ｂとを通話位置に回転させ、かつキー溝３２をキー部ａ２（ｂ３）に合わせることにより、支持筒ａ１を通り抜けて支持筒ｂ１に挿入可能であり、キー溝３２にキー部ｂ３が嵌り込むことにより、支持筒ｂ１に回転不能に連結されている。嵌合部材３Ａの一端面（ヒンジ部材２側の端面）には、突起３３，３４が二つずつ形成されている。各突起３３，３４は、キー溝３２の両側にそれぞれ配置形成されている。各突起３３，３４の内周面によって形成される円の直径は、各キー溝３２の底面によって形成される円の直径とほぼ同一か若干小さく設定されている。
【００１８】
ヒンジ部材３の係合部材３Ｂは、図８に示すように、薄い円板状をなしており、その中央部には、取付孔３５が形成されている。係合部材３Ｂの外径は、突起３３，３４によって形成される円の直径とほぼ同一になっている。したがって、係合部材３Ｂは、４個の突起３３，３４間に挿入可能であり、挿入した状態では４個の突起３３，３４によって嵌合部材３Ａと芯合わせされる。よって、係合部材３Ｂは、キー部ａ２に邪魔されることなく嵌合部材３Ａと共に支持筒ａ１を通り抜け可能であり、キー部ｂ３に邪魔されることなく支持筒ｂ１に挿入可能である。また、係合部材３Ｂの外周面には、一対の幅広突起３６，３６が周方向に１８０°離れて形成されている。各突起３６が嵌合部材３Ａの突起３３，３４間に嵌り込むことにより、係合部材３Ｂが嵌合部材３Ａに回転不能に連結されている。したがって、係合部材３Ｂは、嵌合部材３Ａと一体に回転し、両者からなるヒンジ部材３は受話部Ｂと一体に回転する。なお、幅広突起３６，３６の外周面の直径は、嵌合部材３Ａの外径とほぼ同一になっている。
【００１９】
上記一対のヒンジ部材２，３は、連結軸５によって相対回転可能に連結されている。連結軸５は、図２、図３および図７に示すように、円板状をなすフランジ部５１と、このフランジ部５１の一端面中央部からフランジ部５１の軸線に沿って延びる軸部５２とを有している。軸部５２の先端部には、軸部５２より若干小径の取付軸部５３が形成されている。この取付軸部５３の先端面には、加締め用の孔５３ａが形成されている。そして、取付軸部５３を係合部材３Ｂおよび嵌合部材３Ａの取付孔３１，３５に順次挿入した後、取付軸部５３を加締めることにより、係合部材３Ｂおよび嵌合部材３Ａが互いに接触した状態で連結軸５の一端部に固定されている。
【００２０】
なお、嵌合部材３Ａおよび係合部材３Ｂが連結軸５に一体的に固定されていることから明らかなように、ヒンジ部材３は、嵌合部材３Ａと係合部材３Ｂとの分けることなく、全体を一体に形成してもよく、連結軸５と一体に形成してもよい。また、ヒンジ部材３は、連結軸５にその軸方向へ移動不能に連結してあれば、連結軸５に固定することなく、回転可能に連結してもよい。
【００２１】
図２および図３に示すように、連結軸５の軸部５２は、ヒンジ半体３Ｂの貫通孔２５ａを回転可能に、かつ軸線方向へ移動可能に貫通している。これにより、ヒンジ部材２，３が回転可能に連結されている。貫通孔２５ａを貫通して収容空間２Ｃ内に入り込んだ軸部５２の周囲には、コイルばね（付勢手段）６が軸部５２と同芯に配置されている。このコイルばね６の一端部はフランジ部５１に突き当たり、他端部はカム板部２５に突き当たっている。そして、フランジ部５１を化粧板部２１側へ付勢している。しｔがって、連結軸５に固定されたひんじぶざい３はヒンジ部材２側へ付勢されることになり、ヒンジ部材３の係合部材３Ｂがヒンジ部材２のカム板部２５に押し付けられるとともに、ヒンジ体１全体がユニットとして一体化されている。
【００２２】
係合部材３Ｂとカム板部２５との互いに突き当たる当接面間には、係止機構７が設けられている。この係止機構７により、ヒンジ部材２，３が所定の回転位置（この実施の形態では通話位置および折りたたみ位置）において節度をもって係止されるようになっている。すなわち、図２および図１１に示すように、係合部材３Ｂのカム板部２５との対向面には、一対の係合凹部３７，３７が周方向に１８０°離れて配置形成されている。各係合凹部３７は、周方向に沿う断面形状が円弧状をなしており、その深さは周方向の両端部から中央に向かうにしたがって漸次深くなっている。
【００２３】
一方、カム板部２５の係合部材３Ｂとの対向面には、図２および図９に示すように、一対の係合凸部２７，２７が形成されている。一対の係合凸部２７，２７は、周方向に１８０°離れており、送話部Ａと受話部Ｂとを通話位置に回転させたとき、係合凹部３７，３５にそれぞれ嵌り込むように配置されている。係合凸部２７は、周方向に沿う断面形状が円弧状をなしており、その高さは周方向の両端部から中央に向かうにしたがって漸次高くなっている。しかも、係合凸部２７の円弧状をなす外面の曲率半径は、係合凹部３７の曲率半径と同等か若干小さくなっている。したがって、送話部Ａと受話部Ｂとを通話位置に回転させると、係合凸部２７と係合凹部３７とがコイルばね６によって互いに嵌り込んだ状態に維持される。その結果、ヒンジ部材２，３が所定の強さの力で、つまり節度をもって係止状態に維持され、ひいては送話部Ａと受話部Ｂとが通話位置に維持される。また、送話部Ａと受話部Ｂとを折りたたみ位置に回転させると、係合凸部２７が係合凹部３７の中央から周方向に若干外れた個所に接触するようになっている。したがって、送話部Ａと受話部Ｂとは、折りたたみ位置に回転させると、コイルばね６の付勢力によって互いに押し付けられた状態に維持される。
【００２４】
上記構成のヒンジ体１を組み立てる場合には、まず連結軸５の軸部５２に、ヒンジ半体２Ｂとコイルばね６とをその順に外挿する。次に、連結軸５の取付軸部５３に係合部材３Ｂおよび嵌合部材３Ａを順次挿入して固定するとともに、ヒンジ半体２Ｂにヒンジ半体２Ａを固定する。
【００２５】
また、ヒンジ体１を用いて送話部Ａと受話部Ｂとを連結する場合には、予め送話部Ａと受話部Ｂとを通話位置に位置させるとともに、支持筒ａ１，ｂ１の軸線を一致させる。一方、ヒンジ体１については、係合凸部２７と係合凹部３７とを互いに嵌り込ませる。それにより、ヒンジ部材２のキー溝２３とヒンジ部材３のキー溝３２とを周方向において同一位置に位置させておく。
【００２６】
そして、キー溝２３，３２の周方向の位置をキー部ａ２，ｂ３に合わせ、ヒンジ体１を支持筒ａ１から支持筒ｂ１に向かって挿入する。この場合、ヒンジ部材３を前側にする。ヒンジ部材３は、支持筒ａ１を通り抜け、支持筒ｂ１に挿入される。そして、キー溝３２にキー部ｂ３が嵌り込むことにより、支持筒ｂ１に回転不能に連結される。一方、ヒンジ部材２は、ヒンジ部材３に続いて支持筒ａ１に挿入されるが、挿入に際しては係合突起２２ａが支持筒ａ１の内周面によって内周側へ変位させられる。そして、化粧板部２１がキー部ａ２に突き当たると、係合突起部２２ａが支持筒ａ１を通り抜け、元の位置まで外周側へ変位することによって支持筒ａ１の内側の面に係合する。この結果、ヒンジ部材２が支持筒ａ１に抜け止めされた状態で連結され、ひいてはヒンジ体１が支持筒ａ１に抜け止め状態で連結される。しかも、この状態では、ヒンジ部材２のヒンジ部材３側の端部が支持筒ｂ１に回転可能に嵌合する。これによって、支持筒ａ１，ｂ１が回転可能に連結され、ひいては送話部Ａと受話部Ｂとが回転可能に連結される。
【００２７】
上記の回転連結構造では、一方のヒンジ部材２に係合部たる化粧板部２１および係合突起２２ａを形成し、この化粧板部２１と係合突起２２ａとを一方の支持筒ａ１の両端部に係合させているから、化粧板部２１と係合突起２２ａとの間の距離、および支持筒ａ１の両端部間の距離（キー部ａ２の外側の端部から支持筒ａ１の内側の端面までの距離）には、ヒンジ部材２（ヒンジ半体２Ａ）の長さ誤差および支持筒ａ１の長さ誤差が加味されるだけであり、他方のヒンジ部材３および支持筒ｂ１の長さ誤差、それらの組立誤差等が加味されることがない。したがって、支持筒ａ１，ｂ１とヒンジ体１との間の軸線方向におけるガタを小さくすることができる。逆に、そのようなガタを一定の範囲内に抑える場合には、ヒンジ部材２，３および支持筒ａ１，ｂ１の長さの許容差を比較的大きくすることができ、それによって製造費を低減することができる。
【００２８】
また、ヒンジ部材２に係合部として兼用される化粧板部２１を形成し、この化粧板部２１を支持筒ａ１の外側の端部に嵌合させることにより、支持筒ａ１の内部およびヒンジ体１を遮蔽することができ、それによって美観を向上させることができる。さらに、ヒンジ部材２の内部に収容空間２Ｃを形成し、この収容空間２Ｃ内に連結軸５の端部およびコイルばね６を収容しているので、全体を小型化することができる。特に、コイルばね６を連結軸５と同芯に配置した場合には、大径のコイルばね６を用いることができる。
【００２９】
なお、この発明は上記の実施の形態に限定されるものでなく、適宜変更可能である。
例えば、上記の実施の形態においては、ヒンジ部材２の一端部を支持筒ａ１に回転不能に嵌合するとともに、ヒンジ部材２の他端部を支持筒ｂ１に回転可能に嵌合させることにより、支持筒ａ１，ｂ１を回転可能に連結しているが、連結軸５とヒンジ体２（の貫通孔２５ａ）との嵌合長さを長くしてその嵌合強度を十分に強くすれば、ヒンジ部材２，３をそれぞれ支持筒ａ１，ｂ１にのみ嵌合させ、支持筒ａ１およびヒンジ部材２と支持筒ｂ１およびヒンジ部材３とを連結軸５を介して回転可能に連結してもよい。
また、上記の実施の形態においては、支持筒ｂ１の内周面の支持筒ａ１側における端部に係合突起２２ａを収容する収容凹部ｂ２を形成しているが、支持筒ａ１の内周面の支持筒ｂ１側における端部に収容凹部を形成し、この収容凹部の支持筒ｂ１側を向く側面に係合突起２２ａを係合させるようにしてもよい。
【００３０】
【発明の効果】
以上説明したように、この発明によれば、支持筒とヒンジ体との間の軸線方向におけるガタを小さくすることができるという効果が得られる。
【図面の簡単な説明】
【図１】この発明を携帯電話の送話部と受話部とに適用した一実施の形態を示す図４のＸ−Ｘ線に沿う断面図である。
【図２】ヒンジ体を断面にして示す図１と同様の図である。
【図３】図６（Ｂ）のＸ−Ｘ線に沿う図１と同様の断面図である。
【図４】この発明の回転連結構造によって連結されるべき携帯電話の送話部および受話部の各一部を示す側面図である。
【図５】図４のＸ−Ｘ線に沿う一部省略断面図である。
【図６】この発明に係るヒンジ体を示す図であって、図６（Ａ）はその正面図、図６（Ｂ）はその平面図、図６（Ｃ）はその左側面図、図６（Ｄ）はその右側面図である。
【図７】同ヒンジ体の分解斜視図である。
【図８】同ヒンジ体の一方のヒンジ半体を示す図であって、図８（Ａ）はその正面図、図８（Ｂ）、（Ｃ）、（Ｄ）はそれぞれ図８（Ａ）のＢ矢視、Ｃ矢視、Ｄ矢視図である。
【図９】同ヒンジ体の他方のヒンジ半体を示す図であって、図９（Ａ）はその正面図、図９（Ｂ）、（Ｃ）、（Ｄ）はそれぞれ図９（Ａ）のＢ矢視、Ｃ矢視、Ｄ矢視図、図９（Ｅ）、（Ｆ）はそれぞれ図９（Ｃ）のＥ−Ｅ線、Ｆ−Ｆ線に沿う断面図である。
【図１０】同ヒンジ体の嵌合部材を示す図であって、図１０（Ａ）はその平面図、図１０（Ｂ）は図１０（Ａ）のＢ−Ｂ線に沿う断面図、図１０（Ｃ）はその正面図である。
【図１１】同ヒンジ体の係合部材を示す図であって、図１１（Ａ）はその平面図、図１１（Ｂ）は図１１（Ａ）のＢ−Ｂ線に沿う断面図、図１１（Ｃ）は図１１（Ａ）のＣ−Ｃ線に沿う拡大断面図である。
【符号の説明】
Ａ送話部（物品）
Ｂ受話部（物品）
ａ１支持筒
ａ２キー部
ｂ１支持筒
ｂ２収容凹部
１ヒンジ装置
２第１ヒンジ部材
２Ｃ収容空間
３第２ヒンジ部材
５連結軸
６コイルばね（付勢手段）
７係止機構
２１化粧板部（係合部）
２２ａ係合突起（係合部）
２３第１ヒンジ部材のキー溝
５１フランジ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary connection structure for rotatably connecting an article to two parts such as a transmitter and a receiver of a mobile phone.
[0002]
[Prior art]
Conventionally, when connecting a transmitter and a receiver of a mobile phone in a rotatable manner, the support cylinders provided respectively in the transmitter and receiver are arranged in a line with their axes aligned with each other. A hinge body is inserted from one support cylinder into the other support cylinder. The hinge body has a pair of hinge bodies that are rotatably connected. One hinge body is non-rotatably fitted to one support cylinder, and the other hinge body penetrates the one support cylinder. The other support cylinder is non-rotatably fitted. As a result, the transmitting part and the receiving part are rotatably connected.
[0003]
By the way, it is necessary to prevent the hinge body from coming off from the support tube. Therefore, in the conventional hinge body, an engagement portion is provided at each end portion of the pair of hinge members that are separated from each other, and each engagement portion is engaged with each end portion of each support cylinder that is away from each other. This prevents the hinge body from coming off the support tube.
[0004]
[Problems to be solved by the invention]
However, when it is prevented from coming off as described above, length errors and assembly errors of the first and second hinge members appear as errors in the distance between the engaging portions, and length errors of the pair of support cylinders, Assembling errors and the like appear as dimensional errors between the both ends. For this reason, the distance between the engaging portions must be set longer than the distance between the end portions of the support cylinder, and as a result, there is a problem that large backlash tends to occur in the axial direction between the hinge body and the support cylinder. there were.
[0005]
[Means for Solving the Problems]
In order to solve the above problem, the present invention arranges the support cylinders of two articles in a line with their axes aligned with each other, and inserts a hinge body from one support cylinder to the other support cylinder, thereby In a rotary connection structure in which two articles are rotatably connected via a hinge body, the hinge body is non-rotatably inserted into the one support cylinder and is rotatable relative to the first hinge member. And a second hinge member that passes through the one support cylinder and is inserted into the other support cylinder in a non-rotatable manner. One end and the other end of the first hinge member Are provided with engaging portions for preventing the first hinge member from coming off from the one supporting cylinder by engaging both ends of the one supporting cylinder, respectively, and the two supporting cylinders are adjacent to each other. At least one of the end faces To is characterized in that the housing recess for accommodating the contact portion of the other of the supporting cylinder side.
[0006]
In this case, the abutting portion on the other support cylinder side is elastically displaceable radially inward of the support cylinder, and elastically displaces radially inward to pass through the inside of the one support cylinder. After that, it is desirable to engage the end of the one support cylinder adjacent to the other support cylinder by elastically returning and displacing radially outward.
A key portion that extends along the axial direction of the one support cylinder and prevents the rotation of the first hinge member by being fitted in the key groove of the first hinge member is provided on the one support cylinder. A support cylinder is formed by being arranged away from the end face of the cylinder on the side where the hinge body is inserted, and fitted to the one support cylinder at the end of the first hinge member away from the second hinge member. An engaging decorative plate portion is formed, and the decorative plate portion abuts against the key portion to prevent the first hinge member from moving in the direction from the one support cylinder side to the other support cylinder. It is preferable that the thickness of the decorative plate portion is also set to be substantially the same as the interval between the end surface of the support tube and the key portion.
A connecting shaft that is disposed on the axis of the first and second hinge members, and that connects the first and second hinge members so as to be rotatable and movable within a predetermined range in the axial direction; Urging means for pressing the second hinge member against each other in the axial direction, and the first and second hinge members are disposed on the contact surfaces of the first and second hinge members pressed by the urging means. It is desirable that a locking mechanism is provided that locks in a releasable manner at a predetermined rotational position.
One end of the connecting shaft is connected to the second hinge member so as not to move in the axial direction, the other end of the connecting shaft is connected to the first hinge member so as to be movable in the axial direction, and the second hinge member is It is desirable that the biasing means be biased toward the first hinge member via the connecting shaft.
It is desirable that an accommodation space is provided inside the first hinge member, and that the other end portion of the connecting shaft and the urging means are accommodated in the accommodation space.
A coil spring is used as the urging means, and it is desirable that the coil spring is disposed substantially concentrically with the connecting shaft.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, the present invention is applied to a rotary connection structure that rotatably connects a transmitter and a receiver of a folding mobile phone. In addition, the present invention can also be applied to other rotary connection structures that rotatably connect two articles other than the receiver.
[0008]
First, the transmitting unit A and the receiving unit B of the mobile phone that are rotatably connected by the rotary connecting structure of the present invention will be described. As shown in FIGS. 4 and 5, the receiving unit B side of the transmitting unit A A pair of support cylinders a1 (only the left support cylinder is shown) spaced apart in the left-right direction in FIG. The receiver B is also provided with a pair of support cylinders b1 (only one is shown). The pair of support cylinders b1 and b1 are disposed between the support cylinders a1 and a1 so as to be adjacent to each other, and the support cylinders a1 and b1 adjacent in the axis L direction form a set. As will be described later, when the hinge body 1 is inserted into each pair of support cylinders a1 and b1, the support cylinders a1 and b1 are rotatably connected, and as a result, the transmitter A and the receiver B rotate. It is designed to be connected as possible.
[0009]
As shown in FIG. 5, a key portion a2 extending in the direction of the axis L is provided on the inner peripheral surface of the support cylinder a1. In this case, two key portions a2 are formed 180 degrees apart in the circumferential direction, but only one key portion a2 may be formed. The key part a2 is arranged away from the end face on the outer side (the side away from the support cylinder b1, that is, the left side) of the support cylinder a1. As will be described later, the inner diameter of the support cylinder b1 is set to be equal to or less than the inner diameter of the support cylinder a1 because the hinge member 3 passes through the support cylinder a1 and is inserted into the support cylinder b1. An accommodation recess b2 having an annular shape is formed at the outer end portion (end portion on the support tube a1 side) of the inner peripheral surface of the support tube b1. A key portion b3 is formed on the inner peripheral surface of the support cylinder b1. The key portion b3 is disposed slightly away from the concave portion b2 inward. Two key portions b3 are formed in the same manner as the key portion a2, and have the same or slightly larger cross-sectional shape as the key portion a2. Moreover, the key part b3 is located at the same position in the circumferential direction as the key part a2 when the transmitting part A and the receiving part B are rotated to a predetermined rotational position (in this embodiment, the talking position shown in FIG. 4). It is arranged to be located in.
[0010]
Next, the hinge body 1 that rotatably connects the support cylinders a1 and b1 will be described. As shown in FIGS. 1 to 6, the hinge body 1 is non-rotatably fitted to the support cylinder a1. A member 2 and a second hinge member 3 that is non-rotatably fitted to the support cylinder b1 are provided. As shown in FIG. 7, one first hinge member 2 is composed of hinge halves 2A and 2B, and the other hinge member (second hinge member) 3 is a fitting member 3A and an engagement member 3B. And is composed of.
[0011]
As shown in FIG. 8, one hinge half 2 A of the first hinge member 2 has a decorative plate portion (engagement portion) 21 having a disk shape at one end portion (left end portion in FIG. 8). Yes. The outer diameter of the decorative plate portion 21 is set to be substantially the same as the inner diameter of the support cylinder a1. Therefore, as shown in FIGS. 1 to 3, the decorative plate portion 21 is fitted into the support cylinder a 1 with almost no gap, thereby shielding the inside of the support cylinder a 1. Thereby, the aesthetic appearance is improved so that the hinge body 1 is not visually recognized from the outside. And the thickness of the decorative board part 21 is equal to the distance from the outer end surface of the support cylinder a1 to the key part a2. Therefore, when the decorative plate portion 21 is inserted into the support tube a1 until it hits the key portion a2, its end surface is positioned on the same plane as the outer end surface of the support tube a1. Thereby, the improvement of the aesthetics is aimed at further.
[0012]
A pair of support arm portions 22 and 22 extending along the axis of the decorative plate portion 21 are formed 180 ° apart in the circumferential direction on the outer peripheral side portion of the other end surface (end surface on the support cylinder b1 side b) of the decorative plate portion 21. Has been. The outer peripheral surfaces of the support arm portions 22, 22 have the same outer diameter as the outer peripheral surface of the decorative plate portion 21, and constitute the same cylindrical surface as the outer peripheral surface of the decorative plate portion 21. The support arm portion 22 is formed with a key groove 23 extending from the front end surface to the decorative plate portion 21. The width of the key groove 23 is the same as the width of the key part a2 so that the key part a2 can be inserted therein. Therefore, the hinge half 2A can be inserted into the support cylinder a1 by aligning the key groove 23 with the key part a2, and in the state where the decorative plate part 21 is inserted until it hits the key part a2, the key part a2 Is fitted into the key groove 23 so as to be non-rotatably connected to the support cylinder a1. Therefore, the hinge half 2 A rotates integrally with the transmitting part A.
[0013]
When the hinge half 2A is inserted into the support cylinder a1 until the decorative plate part 21 abuts against the key part a2, the support arm part 22 has its tip part protruding from the support cylinder a1 to the support cylinder a2 side. The length is set. An engagement protrusion (engagement portion) 22a that protrudes radially outward is formed on the outer peripheral surface of the distal end portion of the support arm portion 22 that protrudes from the support cylinder a1. A guide surface 22b is formed at the front portion of the engagement protrusion 22a. The guide surface 22b is inclined so as to be directed inward in the radial direction toward the front. When the hinge half 2A is inserted into the support cylinder a1, the guide surface 22b abuts against the inner peripheral surface of the support cylinder a1 and elastically deforms so that the tip end portion of the support arm portion 22 is displaced radially inward. As a result, the engagement protrusion 22a is displaced radially inward and can pass through the support cylinder a1. When the engagement protrusion 22a passes through the support tube a1, the support arm portion 22 returns to the original state. Thereby, the engagement protrusion 22a is displaced radially outward to the original position. Then, the engagement protrusion 22a substantially comes into contact with the inner end surface (the support cylinder b1 side) of the support cylinder a1. In this state, the decorative plate portion 21 abuts against the key portion a2 to prevent the hinge half 2A from moving from the support tube a1 side to the support tube b1 side, and the engagement protrusion 22a is formed on the inner end surface of the support tube a1. The movement in the reverse direction is prevented by hitting. As a result, the hinge half 2A is attached to the support cylinder a1 in a state where it is prevented from coming off, and as a result, the entire hinge body 1 is prevented from coming off from the support cylinder a1.
[0014]
Here, when the engagement protrusion 22a passes through the support cylinder a1, the engagement protrusion 22a enters the support cylinder b1, but an accommodation recess b2 is formed at the end of the support cylinder b1 on the support cylinder a1 side. The engaging protrusion 22a can be accommodated. Therefore, the engagement protrusion 22a can be displaced to the outer peripheral side without hitting the inner peripheral surface of the support cylinder b1.
[0015]
As shown in FIG. 9, the other hinge half 2 B of the first hinge member 2 includes a disc-shaped cam plate portion 25, and an outer peripheral portion of the cam plate portion 25 along the axis of the cam plate portion 25. A pair of extending fitting arms 26, 26 are provided. A through hole 25a is formed in the central portion of the cam plate portion 25 so as to pass therethrough. The outer peripheral surfaces of the pair of fitting arm portions 26, 26 are the same as the inner diameter of the support cylinder b1 (in this embodiment, the same is the same as the inner diameter of the support cylinder a1). Accordingly, the outer diameters of the pair of support arm portions 22 and 22 of the hinge half 2A are the same. Further, the width of the fitting arm portion 26 is the same as the interval between the support arm portions 22 and 22. Therefore, the fitting arm portion 26 can be inserted between the support arm portions 22 and 22 from the tip side. In addition, notches 26 a and 26 a are formed on both sides of the fitting arm portion 26 on the base side, so that step portions 26 b and 26 b are formed at the center of both sides of the fitting arm portion 26. . 1 and 6, when the fitting arm portion 26 is inserted between the supporting arm portions 22 and 22 until the tip of the fitting arm portion 26 abuts against the decorative plate portion 21, the step portions 26b and 26b are inserted. Locking projections 22c and 22c formed on the side surfaces of the support arms 22 and 22 are engaged. Thus, the fitting arm portions 26 and 26 are connected and fixed to the support arm portions 22 and 22, and the hinge half body 2B is fixed integrally to the hinge half body 2A. The hinge halves 2A and 2B are fixed so that their axes coincide with each other.
[0016]
The first hinge member 2 is constituted by the hinge halves 2A and 2B fixed to each other. As shown in FIGS. 2 and 3, a decorative plate portion 21 and a cam plate are provided inside the first hinge member 2. An accommodation space 2 C is formed in which the portion 25 is a bottom portion at both ends, and the support arm portions 22 and 22 and the fitting arm portion 26 are peripheral wall portions.
[0017]
As shown in FIG. 10, the fitting member 3A of the hinge member 3 has a disk shape with a relatively large thickness, and the outer diameter thereof is substantially the same as the inner diameter of the support cylinder b1. A fitting hole 31 is formed in the center of the fitting member 3A, and a pair of key grooves 32, 32 are formed 180 ° apart from each other on the outer circumferential surface. The key portion b3 can be inserted into the key groove 32. Therefore, the fitting member 3B rotates through the support cylinder a1 to the support cylinder b1 by rotating the transmitting section A and the receiving section B to the talking position and aligning the key groove 32 with the key section a2 (b3). The key portion b3 is fitted into the key groove 32 and is non-rotatably connected to the support tube b1. Two projections 33 and 34 are formed on one end surface (end surface on the hinge member 2 side) of the fitting member 3A. The protrusions 33 and 34 are arranged and formed on both sides of the keyway 32, respectively. The diameter of the circle formed by the inner peripheral surfaces of the protrusions 33 and 34 is set to be substantially the same as or slightly smaller than the diameter of the circle formed by the bottom surface of each key groove 32.
[0018]
As shown in FIG. 8, the engaging member 3B of the hinge member 3 has a thin disk shape, and an attachment hole 35 is formed at the center thereof. The outer diameter of the engaging member 3B is substantially the same as the diameter of the circle formed by the protrusions 33 and 34. Therefore, the engaging member 3B can be inserted between the four protrusions 33 and 34, and in the inserted state, the engaging member 3B is aligned with the fitting member 3A by the four protrusions 33 and 34. Therefore, the engaging member 3B can pass through the support cylinder a1 together with the fitting member 3A without being obstructed by the key part a2, and can be inserted into the support cylinder b1 without being obstructed by the key part b3. Further, a pair of wide protrusions 36, 36 are formed on the outer peripheral surface of the engaging member 3B so as to be separated from each other by 180 ° in the circumferential direction. Each protrusion 36 fits between the protrusions 33 and 34 of the fitting member 3A, so that the engaging member 3B is non-rotatably connected to the fitting member 3A. Therefore, the engaging member 3B rotates integrally with the fitting member 3A, and the hinge member 3 composed of both rotates integrally with the receiver B. In addition, the diameter of the outer peripheral surface of the wide protrusions 36 and 36 is substantially the same as the outer diameter of the fitting member 3A.
[0019]
The pair of hinge members 2 and 3 are coupled to each other by a coupling shaft 5 so as to be relatively rotatable. As shown in FIGS. 2, 3, and 7, the connecting shaft 5 includes a disc-shaped flange portion 51, and a shaft portion 52 that extends from the central portion of one end surface of the flange portion 51 along the axis of the flange portion 51. And have. An attachment shaft 53 having a slightly smaller diameter than the shaft 52 is formed at the tip of the shaft 52. A caulking hole 53 a is formed on the distal end surface of the mounting shaft portion 53. Then, after sequentially inserting the attachment shaft portion 53 into the attachment holes 31 and 35 of the engagement member 3B and the fitting member 3A, the engagement member 3B and the fitting member 3A come into contact with each other by crimping the attachment shaft portion 53. In this state, it is fixed to one end of the connecting shaft 5.
[0020]
As is clear from the fact that the fitting member 3A and the engaging member 3B are integrally fixed to the connecting shaft 5, the hinge member 3 is not divided into the fitting member 3A and the engaging member 3B. The whole may be formed integrally or may be formed integrally with the connecting shaft 5. Further, the hinge member 3 may be rotatably connected without being fixed to the connecting shaft 5 as long as it is connected to the connecting shaft 5 so as not to move in the axial direction.
[0021]
As shown in FIGS. 2 and 3, the shaft portion 52 of the connecting shaft 5 passes through the through hole 25a of the hinge half 3B so as to be rotatable and movable in the axial direction. Thereby, the hinge members 2 and 3 are connected rotatably. A coil spring (biasing means) 6 is arranged concentrically with the shaft portion 52 around the shaft portion 52 that penetrates the through hole 25a and enters the accommodation space 2C. One end portion of the coil spring 6 abuts against the flange portion 51, and the other end portion abuts against the cam plate portion 25. And the flange part 51 is urged | biased to the decorative board part 21 side. Accordingly, the hinge 3 fixed to the connecting shaft 5 is biased to the hinge member 2 side, and the engaging member 3B of the hinge member 3 is moved to the cam plate portion 25 of the hinge member 2. While being pressed, the entire hinge body 1 is integrated as a unit.
[0022]
A locking mechanism 7 is provided between the contact surfaces of the engaging member 3B and the cam plate portion 25 that abut each other. By this locking mechanism 7, the hinge members 2 and 3 are locked with moderation at a predetermined rotational position (in this embodiment, the talking position and the folding position). That is, as shown in FIGS. 2 and 11, a pair of engaging recesses 37, 37 are disposed and formed on the surface of the engaging member 3 B facing the cam plate portion 25 so as to be 180 ° apart in the circumferential direction. Each engaging recess 37 has a circular cross-sectional shape along the circumferential direction, and the depth gradually increases from both ends in the circumferential direction toward the center.
[0023]
On the other hand, as shown in FIGS. 2 and 9, a pair of engaging convex portions 27, 27 are formed on the surface of the cam plate portion 25 facing the engaging member 3B. The pair of engaging convex portions 27 and 27 are 180 ° apart in the circumferential direction, and are fitted into the engaging concave portions 37 and 35 when the transmitting portion A and the receiving portion B are rotated to the talking position, respectively. Has been placed. The engagement convex portion 27 has a circular cross-sectional shape along the circumferential direction, and the height gradually increases from both ends in the circumferential direction toward the center. Moreover, the radius of curvature of the outer surface of the engagement convex portion 27 forming the arc shape is equal to or slightly smaller than the radius of curvature of the engagement concave portion 37. Therefore, when the transmitting part A and the receiving part B are rotated to the talking position, the engaging convex part 27 and the engaging concave part 37 are maintained in a state of being fitted to each other by the coil spring 6. As a result, the hinge members 2 and 3 are maintained in a locked state with a predetermined strength, that is, moderately, and as a result, the transmitting section A and the receiving section B are maintained at the call position. Further, when the transmitting part A and the receiving part B are rotated to the folding position, the engaging convex part 27 comes into contact with a portion slightly deviated from the center of the engaging concave part 37 in the circumferential direction. Therefore, when the transmitting part A and the receiving part B are rotated to the folding position, the transmitting part A and the receiving part B are kept pressed against each other by the urging force of the coil spring 6.
[0024]
When assembling the hinge body 1 having the above-described configuration, the hinge half body 2B and the coil spring 6 are first extrapolated in this order on the shaft portion 52 of the connecting shaft 5. Next, the engaging member 3B and the fitting member 3A are sequentially inserted and fixed to the attachment shaft portion 53 of the connecting shaft 5, and the hinge half 2A is fixed to the hinge half 2B.
[0025]
When the transmitter A and the receiver B are connected using the hinge body 1, the transmitter A and the receiver B are previously positioned at the call position, and the axes of the support cylinders a1 and b1 are set. Match. On the other hand, for the hinge body 1, the engagement convex portion 27 and the engagement concave portion 37 are fitted into each other. Thereby, the key groove 23 of the hinge member 2 and the key groove 32 of the hinge member 3 are located at the same position in the circumferential direction.
[0026]
Then, the circumferential positions of the key grooves 23 and 32 are aligned with the key portions a2 and b3, and the hinge body 1 is inserted from the support cylinder a1 toward the support cylinder b1. In this case, the hinge member 3 is set to the front side. The hinge member 3 passes through the support cylinder a1 and is inserted into the support cylinder b1. Then, when the key portion b3 is fitted into the key groove 32, the key cylinder 32 is non-rotatably connected to the support tube b1. On the other hand, the hinge member 2 is inserted into the support cylinder a1 following the hinge member 3, but the engagement protrusion 22a is displaced to the inner peripheral side by the inner peripheral surface of the support cylinder a1 upon insertion. When the decorative plate portion 21 abuts against the key portion a2, the engaging projection 22a passes through the support tube a1 and is displaced to the outer peripheral side to the original position, thereby engaging the inner surface of the support tube a1. As a result, the hinge member 2 is connected to the support cylinder a1 in a state in which the hinge member 2 is prevented from being detached, and as a result, the hinge body 1 is connected to the support cylinder a1 in a state of being prevented from being detached. In addition, in this state, the end of the hinge member 2 on the hinge member 3 side is rotatably fitted to the support cylinder b1. As a result, the support cylinders a1 and b1 are rotatably connected, and as a result, the transmitter A and the receiver B are rotatably connected.
[0027]
In the above-described rotary connection structure, the decorative plate portion 21 and the engaging protrusion 22a which are engaging portions are formed on one hinge member 2, and the decorative plate portion 21 and the engaging protrusion 22a are connected to both end portions of one support cylinder a1. The distance between the decorative plate portion 21 and the engagement protrusion 22a and the distance between both ends of the support tube a1 (from the outer end of the key portion a2 to the inner end surface of the support tube a1) Only the length error of the hinge member 2 (hinge half 2A) and the length error of the support cylinder a1 are taken into account, and the length error of the other hinge member 3 and the support cylinder b1. These assembly errors are not taken into account. Therefore, the backlash in the axial direction between the support cylinders a1 and b1 and the hinge body 1 can be reduced. On the other hand, when such backlash is kept within a certain range, the length tolerance of the hinge members 2 and 3 and the support cylinders a1 and b1 can be made relatively large, thereby reducing the manufacturing cost. can do.
[0028]
Further, a decorative plate portion 21 that is also used as an engaging portion is formed on the hinge member 2, and the decorative plate portion 21 is fitted to the outer end portion of the support tube a1, thereby allowing the inside of the support tube a1 and the hinge body. 1 can be shielded, thereby improving the aesthetics. Furthermore, since the accommodation space 2C is formed inside the hinge member 2 and the end of the connecting shaft 5 and the coil spring 6 are accommodated in the accommodation space 2C, the whole can be reduced in size. In particular, when the coil spring 6 is disposed concentrically with the connecting shaft 5, the large-diameter coil spring 6 can be used.
[0029]
In addition, this invention is not limited to said embodiment, It can change suitably.
For example, in the above-described embodiment, by fitting one end of the hinge member 2 to the support cylinder a1 so as not to rotate and fitting the other end of the hinge member 2 to the support cylinder b1 so as to be rotatable, The support cylinders a1 and b1 are rotatably connected, but if the fitting length between the connecting shaft 5 and the hinge body 2 (through hole 25a) is increased to sufficiently increase the fitting strength, the hinge The members 2 and 3 may be fitted only to the support cylinders a1 and b1, respectively, and the support cylinder a1 and the hinge member 2, and the support cylinder b1 and the hinge member 3 may be rotatably connected via the connecting shaft 5.
In the above-described embodiment, the housing recess b2 that houses the engagement protrusion 22a is formed at the end of the inner peripheral surface of the support tube b1 on the support tube a1 side. However, the inner peripheral surface of the support tube a1 An accommodation recess may be formed at the end of the support cylinder b1 and the engagement protrusion 22a may be engaged with a side surface of the accommodation recess facing the support cylinder b1.
[0030]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the backlash in the axial direction between the support tube and the hinge body.
[Brief description of the drawings]
1 is a cross-sectional view taken along line XX of FIG. 4 showing an embodiment in which the present invention is applied to a transmitter and receiver of a mobile phone.
FIG. 2 is a view similar to FIG. 1 showing the hinge body in cross section.
3 is a cross-sectional view similar to FIG. 1, taken along line XX in FIG. 6B.
FIG. 4 is a side view showing a part of a transmitting part and a receiving part of a mobile phone to be connected by the rotary connecting structure of the present invention.
5 is a partially omitted cross-sectional view taken along line XX of FIG.
6A and 6B are views showing a hinge body according to the present invention, in which FIG. 6A is a front view thereof, FIG. 6B is a plan view thereof, FIG. 6C is a left side view thereof, and FIG. (D) is a right side view thereof.
FIG. 7 is an exploded perspective view of the hinge body.
8 is a view showing one hinge half of the hinge body, FIG. 8 (A) is a front view thereof, and FIGS. 8 (B), (C), and (D) are FIG. 8 (A), respectively. It is a B arrow view, C arrow view, and D arrow view.
9 is a diagram showing the other hinge half of the hinge body, FIG. 9 (A) is a front view thereof, and FIGS. 9 (B), (C), and (D) are FIG. 9 (A), respectively. B arrow view, C arrow view, D arrow view, and FIGS. 9E and 9F are sectional views taken along lines EE and FF in FIG. 9C, respectively.
10A is a plan view of the fitting member of the hinge body, FIG. 10B is a cross-sectional view taken along line BB in FIG. 10 (C) is a front view thereof.
11A and 11B are views showing an engaging member of the hinge body, in which FIG. 11A is a plan view thereof, and FIG. 11B is a cross-sectional view taken along line BB of FIG. 11 (C) is an enlarged cross-sectional view taken along the line CC of FIG. 11 (A).
[Explanation of symbols]
A Sending part (article)
B Earpiece (article)
a1 Support tube
a2 Key part
b1 Support tube
b2 receiving recess
1 Hinge device
2 First hinge member
2C accommodation space
3 Second hinge member
5 connecting shaft
6 Coil spring (biasing means)
7 Locking mechanism
21 Decorative plate part (engagement part)
22a Engagement protrusion (engagement part)
23 Keyway of first hinge member
51 Flange

Claims

The support cylinders of two articles are aligned in a line with their axes aligned, and a hinge body is inserted from one support cylinder to the other support cylinder, so that the two articles can be rotatably connected via the hinge body. In the rotating connection structure
The hinge body is inserted into the one support cylinder in a non-rotatable manner, and is rotatably connected to the first hinge member, and penetrates through the one support cylinder to the other support cylinder. A second hinge member that is inserted in a non-rotatable manner,
Engagement portions that prevent the first hinge member from coming off from the one support cylinder portion by engaging the one end portion and the other end portion of the first hinge member with both end portions of the one support cylinder, respectively. Are provided,
A rotary coupling structure characterized in that an accommodation recess for accommodating a contact portion on the other support cylinder side is formed on at least one of the end faces adjacent to each other of the two support cylinders.

The contact portion on the other support cylinder side is elastically displaceable toward the inside in the radial direction of the support cylinder, and after elastically displacing to the inside in the radial direction and passing through the inside of the one support cylinder, 2. The rotary coupling structure according to claim 1, wherein the rotary coupling structure is engaged with an end portion of the one support cylinder adjacent to the other support cylinder by elastically returning and displacing radially outward.

A key portion that extends along the axial direction of the one support cylinder and prevents the rotation of the first hinge member by being fitted in the key groove of the first hinge member is provided on the one support cylinder. A support cylinder is formed by being arranged away from the end surface of the cylinder on the side where the hinge body is inserted, and fitted into the one support cylinder at the end of the first hinge member away from the second hinge member. An engaging decorative plate portion is formed, and the decorative plate portion abuts against the key portion to prevent the first hinge member from moving in the direction from the one support cylinder side to the other support cylinder. The rotation according to claim 1 or 2, wherein the thickness of the decorative plate portion is also set to be substantially the same as the interval between the end surface of the support tube and the key portion. Connected structure.

A connecting shaft that is disposed on the axis of the first and second hinge members, and that connects the first and second hinge members so as to be rotatable and movable within a predetermined range in the axial direction; Urging means for pressing the second hinge member in the axial direction to each other, and the first and second hinge members are arranged on the contact surfaces pressed by the urging means of the first and second hinge members. The rotation coupling structure according to any one of claims 1 to 3, further comprising a locking mechanism that is detachably locked at a predetermined rotational position with moderation.

One end of the connecting shaft is connected to the second hinge member so as not to move in the axial direction, the other end of the connecting shaft is connected to the first hinge member so as to be movable in the axial direction, and the second hinge member is The rotary coupling structure according to claim 4, wherein the biasing means is biased toward the first hinge member via the coupling shaft.

6. The rotary coupling structure according to claim 5, wherein a housing space is provided inside the first hinge member, and the other end of the coupling shaft and the biasing means are housed in the housing space. .

The rotary coupling structure according to claim 6, wherein a coil spring is used as the biasing means, and the coil spring is disposed substantially concentrically with the coupling shaft.