JP2004190785A

JP2004190785A - Hinge device and electronic equipment using the same

Info

Publication number: JP2004190785A
Application number: JP2002359383A
Authority: JP
Inventors: Katsutoshi Sato; 勝俊佐藤
Original assignee: Strawberry Corp
Current assignee: Advanex Motion Design Inc
Priority date: 2002-12-11
Filing date: 2002-12-11
Publication date: 2004-07-08
Anticipated expiration: 2022-12-11
Also published as: JP4044430B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide an epoch-making hinge device allowing free adjustment of angle by forming so that, while producing a conventional sufficient closing energization and recess/projection engagement holding function in engagement, the hinge device is not engaged and held at an opening position, and electronic equipment using the hinge device. <P>SOLUTION: This hinge device is so formed that a first recessed part 10A engaged with a first projected part 9A formed on a cam part 9 is formed in a cam engagement part 10, and the engagement is under way when the first projected part 9A and the first recessed part 10A are in engagedly closed state. A second projected part 9B and a second recessed part 10B are formed on the cam part 9 and the cam engagement part 10, and the projected part 9B is set shorter in rotating direction width than the recessed part 10A and the recessed part 10B is set shorter in rotating direction width than the projected part 9A. In the engagedly closed state, both the first and second projected parts 9A and 9B and both recessed parts 10A and 10B are under engagement. When the device is rotated in an opening direction, the projected part 9A is allowed to pass without falling in the recessed part 10B, and the projected part 9B is supported and floatingly held on the recessed part 10A since the projected part 9A does not fall in and engage with the recessed part 10A. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、ノート型と称されるパソコンやワープロ、あるいは携帯電話などの電子機器における操作部を備えた本体部とディスプレイ部を備えた開閉蓋部となる重合部とを起伏開閉自在に枢着するために使用されるヒンジ装置並びにこの電子機器に関するものである。
【０００２】
【従来の技術及び発明が解決しようとする課題】
例えば、ノート型と称されるパソコンやワープロは、操作部を備えた本体部に対してディスプレイ部を備えた開閉蓋部（重合部）がヒンジ装置を介して起伏開閉自在に設けられているが、この開閉蓋部を本体部に伏した閉塞重合状態でこの開閉蓋部が勝手に開いてしまうことがないように、閉塞状態を維持する重合保持機能をヒンジ装置に設けている。
【０００３】
即ち、例えばヒンジ装置の回動軸部を軸に互いに相対回動自在に設けられる本体部若しくは重合部の回動と共に回動するカム部と、重合部若しくは本体部の回動と共に回動するカム係合部とを有し、閉塞重合状態となるとき、このカム部に設けた凸部とカム係合部に設けた凹部とが凹凸係合することでこの重合状態が係合保持されるように構成する。
【０００４】
更に説明すれば、例えば本体部若しくは重合部に連結する第一連結部に回動軸部を設け、重合部若しくは本体部に連結する第二連結部に前記回動軸部が回動自在に係合する軸受部を設け、前記第一連結部に前記回動軸部と共に回動する凸部を有するカム部を設け、前記軸受部と共に回動する凹部を有するカム係合部を前記第二連結部に設け、この相対回動することで凹凸係合するカム部，カム係合部の少なくとも一方を回動軸部に沿って係合離反方向にスライド移動自在に設けると共に、このカム部，カム係合部の少なくとも一方が係脱するに際して離反方向に移動した際係合方向に付勢するバネによる係合付勢機構を設けて、本体部に対して重合部を相対回動して閉塞重合状態とした際にこのカム部とカム係合部とが凹凸係合途中となり、前記バネによる係合付勢機構によってこの係合途中が保持され閉塞付勢されて重合閉塞状態が係合保持されるように構成し、またこのカム部，カム係合部のいずれか一方を前記係合付勢機構に抗して離反方向に移動させつつ回動させることで前記カム係合部に対してカム部を係脱させ、そのまま本体部に対して重合部を相対回動できるように構成する。
【０００５】
このようにヒンジ装置を構成することで、別に閉塞保持装置を設けてこれをロック解除する等のやっかいな操作は一切不要にして重合状態とすることで自動的にカム係合（凹凸係合）付勢とバネ付勢とによってこの重合状態が係合保持されることとなり、そのままこの閉塞付勢に抗して回動すれば開放できることとなる。即ち、常に重合状態では閉塞方向（重合状態となる方向）に付勢されることとなって開き止めされ、また、開放回動したいときには、この付勢力に抗して回動すればカム係合が外れてそのまま開放回動することができる。
【０００６】
しかしながら、従来のこのカム係合は一般に一方のカム部に１８０度対称位置に夫々凸部を設け、他方のカム係合部にこれに係合する凹部を同じく１８０度対称位置に夫々設け、相対回動することでバネに付勢されつつ夫々が同時に互いに凹凸係合するように構成している。
【０００７】
従って、閉塞重合状態で夫々の凸部と凹部とがバネ付勢によって凹凸係合途中となるように設計して十分な閉塞付勢が生じるようにしているため、この凹凸係合から脱して開放方向に回動した際には１８０度開放回動する手前の例えば１６０〜１７０度くらい開いたところで夫々の凸部と凹部とが完全に再び凹凸係合（クリック係合）し、この位置で開放状態が係合保持されるように構成されている。
【０００８】
そのため、閉塞付勢を生じるだけでなく、必ず開放状態の所定位置でも係合保持されることになるため、便利とも言えるが、逆に常にこの開放位置で係合保持されることとなるためわずらわしい場合も多い。
【０００９】
即ち、カム部とカム係合部とのバネ付勢による相対回動摩擦によって、開き途中のどの位置でも手を放した位置で停止するフリーストップ状態となるように設定すれば、むしろ特定の開放位置で係合保持されない方が、所望する開放位置で停止させることにより自由に重合部の角度を調整設定でき、便利となる場合が多い。
【００１０】
そこで、閉塞重合状態では閉塞付勢あるいは凹凸係合保持機能が従来通り生じるが、開放位置では凹凸係合保持機能が生じない（クリック係合しない）構成に改良することに着目した。
【００１１】
しかし、単にカム部とカム係合部との夫々の一側にのみ一つの凸部と一つの凹部を形成し、これのみを凹凸係合させるように構成すれば、３６０度回動しなければ再び凹凸係合しないため開放位置でクリック係合しない構成とすることができるが、この場合一箇所の凹凸係合のみであるために前記閉塞重合状態での閉塞付勢や凹凸係合保持力が十分に生じない。
【００１２】
また、一箇所での凹凸係合のみとした上で、凹凸係合によるこの閉塞付勢力を大きくするために、この凹凸を深くしたり、傾斜をきつくしたり、バネ力を大きくすると離脱力がかなり必要となってしまったり、スムーズな回動が行えなくなる等という問題が逆に生じてしまう。
【００１３】
本発明は、このような問題点を解決しつつ、従来通り十分な閉じ付勢や凹凸係合保持機能が重合時に生じつつ、開放位置では係合保持されず自由に角度調整が行える画期的なヒンジ装置並びにヒンジ装置を用いた電子機器を提供することを目的としている。
【００１４】
【課題を解決するための手段】
添付図面を参照して本発明の要旨を説明する。
【００１５】
第一部材２と第二部材４とを回動自在に連結するヒンジ装置であって、回動軸部６を軸に互いに相対回動自在に設けられる前記第一部材２の回動と共に回動するカム部９と、前記第二部材４の回動と共に回動するカム係合部１０とを有し、このカム部９に設けた凸部９Ａとカム係合部１０に設けた凹部１０Ａとが凹凸係合することでその回動位置が係合保持されるように構成したヒンジ装置において、前記カム部９に設けた第一の凸部９Ａが係合する第一の凹部１０Ａを前記カム係合部１０に設け、この第一の凸部９Ａと第一の凹部１０Ａとが前記重合閉塞状態のとき係合若しくは係合途中となるように構成すると共に、この重合閉塞状態のときに同様に係合若しくは係合途中となる第二の凸部９Ｂと第二の凹部１０Ｂを前記カム部９と前記カム係合部１０に設け、前記第二の凸部９Ｂは前記第一の凹部１０Ａより回動方向幅を短くし且つ第二の凹部１０Ｂは前記第一の凸部９Ａより回動方向幅を短く設定して、前記重合閉塞状態のときには第一，第二の双方の凸部９Ａ，９Ｂと双方の凹部１０Ａ，１０Ｂとが夫々係合若しくは係合途中となるが、開放方向に回動した際、前記第一の凸部９Ａは前記第二の凹部１０Ｂには落ち込まずに通過し得、且つこのとき第二の凸部９Ｂは第一の凹部１０Ａ上に前記第一の凸部９Ａが落ち込み係合しないことにより支持され浮上保持されるように構成したことを特徴とするヒンジ装置に係るものである。
【００１６】
また、第一部材２と第二部材４とを枢着し、この第一部材２を第二部材４に対して重合閉塞状態から開放方向に相対的に回動せしめるヒンジ装置であって、第一部材２に連結する第一連結部５に回動軸部６を設け、第二部材４に連結する第二連結部７に前記回動軸部６が回動自在に係合する軸受部８を設け、前記第一連結部５に前記回動軸部６と共に回動する凸部９Ａを有するカム部９若しくは凹部１０Ａを有するカム係合部１０を設け、前記軸受部８と共に回動する凹部１０Ａを有するカム係合部１０若しくは凸部９Ａを有するカム部９を前記第二連結部７に設け、この相対回動することで凹凸係合するカム部９，カム係合部１０の少なくとも一方を係合離反方向にスライド移動自在に設けると共に、このカム部９，カム係合部１０の少なくとも一方が係脱するに際して離反方向に移動した際係合方向に付勢する係合付勢機構１１を設けて、前記第一部材２と前記第二部材４とを相対回動して重合閉塞状態とした際にこのカム部９とカム係合部１０とが凹凸係合若しくは係合途中となり、前記係合付勢機構１１によりこの係合が保持され重合閉塞状態が保持あるいは閉塞付勢されるように構成し、このカム部９，カム係合部１０のいずれか一方を前記係合付勢機構１１に抗して離反方向に移動させつつ回動させることで前記カム係合部１０に対してカム部９を係脱させ、前記第一部材２に対して前記第二部材４を相対回動するように構成したヒンジ装置において、前記カム部９に設けた第一の凸部９Ａが係合する第一の凹部１０Ａを前記カム係合部１０に設け、この第一の凸部９Ａと第一の凹部１０Ａとが前記重合閉塞状態のとき係合若しくは係合途中となるように構成すると共に、この重合閉塞状態のときに同様に係合若しくは係合途中となる第二の凸部９Ｂと第二の凹部１０Ｂを前記カム部９と前記カム係合部１０に設け、前記第二の凸部９Ｂは前記第一の凹部１０Ａより回動方向幅を短くし且つ第二の凹部１０Ｂは前記第一の凸部９Ａより回動方向幅を短く設定して、前記重合閉塞状態のときには第一，第二の双方の凸部９Ａ，９Ｂと双方の凹部１０Ａ，１０Ｂとが係合若しくは係合途中となるが、開放方向に回動した際、前記第一の凸部９Ａは前記第二の凹部１０Ｂには落ち込まずに通過し得、且つこのとき第二の凸部９Ｂは第一の凹部１０Ａ上に前記第一の凸部９Ａが落ち込み係合しないことにより支持され浮上保持されるように構成したことを特徴とするヒンジ装置に係るものである。
【００１７】
また、前記第一の凸部９Ａの突出度は前記第二の凸部９Ｂの突出度より大きく設定したことを特徴とする請求項１，２のいずれか１項に記載のヒンジ装置に係るものである。
【００１８】
また、操作部１を設けた本体部２と、ディスプレイ部３を設けた重合部４とを、前記操作部１を操作しない時にはこの操作部１を覆うように重合配設し、この重合した状態から前記重合部４を相対的に回動して操作部１を露出させることができるように前記本体部２と前記重合部４とを回動自在に連結するヒンジ装置を有し、このヒンジ装置には、前記本体部２を前記第一部材２若しくは第二部材４とし、前記重合部４を前記第二部材４若しくは第一部材２とした前記請求項１〜３のいずれか１項に記載のヒンジ装置を用いたことを特徴とするヒンジ装置を用いた電子機器に係るものである。
【００１９】
【発明の実施の形態】
好適と考える本発明の実施の形態（発明をどのように実施するか）を、図面に基づいてその作用効果を示して簡単に説明する。
【００２０】
例えば、第一部材２に対して第二部材４を相対回動して重合状態とすると、回動軸部６を軸として係合付勢機構１１により押圧付勢されつつカム部９とカム係合部１０とは相対回動して、カム部９の第一の凸部９Ａはカム係合部１０の第一の凹部１０Ａに、カム部９の第二の凸部９Ｂはカム係合部１０の第二の凹部１０Ｂに夫々凹凸係合若しくは係合途中となる。
【００２１】
従って、係合付勢機構１１による押圧付勢とこの凹凸の吸い込み力によるカム係合付勢によって重合方向へ回動付勢（閉塞付勢）が生じ、この係合付勢機構１１に付勢された凹凸係合によって、重合状態が係合保持される。
【００２２】
この際、従来通り二箇所の凹凸部９Ａ，９Ｂ，１０Ａ，１０Ｂによって凹凸係合あるいは凹凸係合途中となるため、例えば極端に凹凸を深くしたり、係合傾斜面の傾斜をきつくしたり、係合付勢機構１１によるバネ付勢を強くしなくても十分な係合保持力が生じる。
【００２３】
また、第一部材２に対して第二部材４を開放方向に相対回動させれば係合付勢機構１１の付勢に抗してカム部９，カム係合部１０の一方を離反させつつ凹凸係合を脱しさせ、そのまま回動させることができるが、この場合、第一の凸部９Ａは第一の凹部１０Ａから脱してカム係合部１０の当接面に沿って回動し、第二の凸部９Ｂも第二の凹部１０Ｂから脱して回動して行くこととなる。そしてこの開放回動に際して重合状態では第二の凸部９Ｂが係合する第二の凹部１０Ｂに第一の凸部９Ａが達することになるが、この第二の凹部１０Ｂは第一の凸部９Ａに比してその回動方向幅が小さいため、第一の凸部９Ａはこの第二の凹部１０Ｂに落ち込み係合することなく、この第二の凹部１０Ｂに対して架設状態となりつつ回動通過することとなる。
【００２４】
また、第二の凸部９Ｂは第一の凹部１０Ａに達することになるが、第二の凸部９Ｂは、この第一の凸部９Ａが第二の凹部１０Ｂに落ち込み係合しないことにより支持されるために（第一の凹部１０Ａは第二の凸部９Ｂよりその回動方向幅は広いけれども）、第二の凸部９Ｂはこの第一の凹部１０Ａには落ち込まず第一の凹部１０Ａ上に浮上保持されつつ回動通過し得ることとなる。
【００２５】
従って、従来とは異なり開放位置で凹凸係合することはない。
【００２６】
従って、係合付勢機構１１による付勢によるカム部９とカム係合部１０との回動摩擦を適正となるように設定することで、スムーズな回動となると共に手を放した位置でその回動位置がこの摩擦によって保持されるフリーストップが実現でき、しかも本発明では従来のように開放位置の特定位置で前述のように凹凸係合しないため、自由な開放角度にこのフリーストップによって自在に調整できることとなる。
【００２７】
また、このフリーストップのための摩擦は回動当接面の状態や係合付勢機構１１の付勢力等によって調整できるが、回動当接面に第一の凸部９Ａ，第二の凸部９Ｂの双方とも当接するように設計すると、ガタ付等によって一方のみが圧接したりする場合だけでなく、前述のように第二の凸部９Ｂが第二の凹部１０Ｂ上に浮上した状態となって必然的に第一の凸部９Ａのみの当接となったりすることで、摩擦状態が変化し、これにより回動トルクが変化してフリーストップが不安定となるおそれもある。
【００２８】
そこで本発明では、更に例えばあえて第二の凸部９Ｂの突出度を第一の凸部９Ａよりもやや小さくして、常に第一の凸部９Ａのみが回動当接面に係合付勢機構１１による付勢によって当接するようにして回動トルクの変化をできるだけなくし、常に安定したフリーストップが実現し得るようにしても良い。
【００２９】
【実施例】
本発明の具体的な実施例について図面に基づいて説明する。
【００３０】
本実施例は、図１に示すように、ラップトップタイプのノート型パソコンに適用した場合のもので、キー操作部１を備えた本体部を第一部材２とし、ディスプレイ部３（ＬＣＤ）を備えた開閉蓋部（重合部）を第二部材４とし、この第一部材２と第二部材４とが重合した閉塞状態から第二部材４を１８０度まで自由に開放状態（使用位置）とすることができる枢着構造に本発明のヒンジ装置を適用している（本実施例では左右両側に設けた場合を示している。）。
【００３１】
本実施例では、第一部材２（本体部）に連結する第一連結部５（連結金具）に回り止め状態に回動軸部６を設け、第二部材４（重合部）に連結する第二連結部７（連結金具）に前記回動軸部６が回動自在に挿通・係合するリング状の軸受部８を設け、前記第一連結部５及び前記回動軸部６と共に回動する凸部９Ａを有するカム部９を第一連結部５に設けている。即ち、第一連結部５の回動軸部６に回り止め状態にして軸方向にスライド自在にカム部９を被嵌している。
【００３２】
また、軸受部８と共に回動する凹部１０Ａを有するカム係合部１０を前記第二連結部７の軸受部８に設けている。即ち、軸受部８に一体形成しても良いが、前記カム部９と対向して係合する側に軸受部８に回り止め状態に係合させると共に、回動軸部６が挿通する軸受孔が連通状態となるようにカム係合部１０を設けている。
【００３３】
即ち、回動軸部６と共にカム係合部１０に対して相対回動することで凹凸係合するカム部９を係合離反方向にスライド移動自在に設けると共に、このカム部９が係脱するに際して離反方向に移動した際係合方向に付勢する係合付勢機構１１を設けている。具体的には、本実施例では、押さえ部１２によって回動軸部６に被嵌状態に設けられる複数の皿バネ１１Ａによって、回動軸部６に回り止め状態にしてスライド自在に被嵌したカム部９を押圧付勢してカム部９とカム係合部１０とを係合付勢し、カム部９とカム係合部１０との凹凸係合が脱して回動するときにはこの皿バネ１１Ａに抗して回動することとなるように構成している。
【００３４】
従って、本体部２に対して重合部４を回動すると、本体部２に設けた第一連結部５の回動軸部６に対して重合部４に設けた軸受部８が回動する。即ち、回動軸部６に回り止め状態に設けたカム部９に対して、軸受部８に回り止め状態に設けたカム係合部１０が回動することとなる。
【００３５】
従って、本体部２に対して重合部４を相対回動して重合状態とすると、回動軸部６を軸として係合付勢機構１１の皿バネ１１Ａにより押圧付勢されつつカム部９とカム係合部１０とは相対回動して、カム部９の第一の凸部９Ａはカム係合部１０の第一の凹部１０Ａに、カム部９の第二の凸部９Ｂはカム係合部１０の第二の凹部１０Ｂに夫々凹凸係合途中となる。
【００３６】
従って、係合付勢機構１１による押圧付勢とこの凹凸の吸い込み力によるカム係合付勢によって重合方向へ回動付勢（閉塞付勢）が生じ、この係合付勢機構１１に付勢された凹凸係合によって、重合状態が係合保持される。
【００３７】
また、本実施例では、前述のように前記カム部９に設けた第一の凸部９Ａが係合する第一の凹部１０Ａを前記カム係合部１０に設け、この第一の凸部９Ａと第一の凹部１０Ａとが前記重合閉塞状態のとき係合途中となるように構成すると共に、この重合閉塞状態のときに同様に係合途中となる第二の凸部９Ｂと第二の凹部１０Ｂとを夫々略１８０度対照位置に前記カム部９と前記カム係合部１０に設け、前記第二の凸部９Ｂは前記第一の凹部１０Ａより回動方向幅を短くし且つ第二の凹部１０Ｂは前記第一の凸部９Ａより回動方向幅を短く設定して、前記重合閉塞状態のときには第一，第二の双方の凸部９Ａ，９Ｂと双方の凹部１０Ａ，１０Ｂとが係合途中となるが、開放方向に回動した際、前記第一の凸部９Ａは前記第二の凹部１０Ｂには落ち込まずに通過し得、且つこのとき第二の凸部９Ｂは第一の凹部１０Ａ上に前記第一の凸部９Ａが落ち込み係合しないことにより支持され浮上保持されるように構成している。即ち、重合状態では、従来通り二箇所の凹凸部９Ａ，９Ｂ，１０Ａ，１０Ｂによって凹凸係合途中となるため、例えば極端に凹凸を深くしたり、係合傾斜面の傾斜をきつくしたり、係合付勢機構１１によるバネ付勢を強くしなくても十分な係合保持力が生じる。
【００３８】
また、開放回動に際しては、第一の凸部９Ａは第一の凹部１０Ａから脱してカム係合部１０の当接面に沿って回動し、第二の凸部９Ｂも第二の凹部１０Ｂから脱して回動して行くこととなる。そしてこの開放回動に際して重合状態では第二の凸部９Ｂが係合する第二の凹部１０Ｂに第一の凸部９Ａが達することになるが、この第二の凹部１０Ｂは第一の凸部９Ａに比してその回動方向幅が小さいため、第一の凸部９Ａはこの第二の凹部１０Ｂに落ち込み係合することなく、この第二の凹部１０Ｂに対して架設状態となりつつ回動通過することとなる。
【００３９】
また、第二の凸部９Ｂは第一の凹部１０Ａに達することになるが、第二の凸部９Ｂは、この第一の凸部９Ａが第二の凹部１０Ｂに落ち込み係合しないことにより支持されるために（第一の凹部１０Ａは第二の凸部９Ｂよりその回動方向幅は広いけれども）、第二の凸部９Ｂはこの第一の凹部１０Ａには落ち込まず第一の凹部１０Ａ上に浮上保持されつつ回動通過し得ることとなる。
【００４０】
従って、従来とは異なり開放位置で凹凸係合することはない。
【００４１】
従って、係合付勢機構１１による付勢によるカム部９とカム係合部１０との回動摩擦を適正となるように設定することで、スムーズな回動となると共に手を放した位置でその回動位置がこの摩擦によって保持されるフリーストップが実現でき、しかも従来のように開放位置の特定位置で前述のように凹凸係合しないため、自由な開放角度にこのフリーストップによって自在に調整できることとなる。
【００４２】
また、本実施例では、前記第一の凸部９Ａの突出度は前記第二の凸部９Ｂの突出度より大きく設定している。即ち、あえて第二の凸部９Ｂの突出度を第一の凸部９Ａよりもやや小さくして、常に第一の凸部９Ａのみが回動当接面に係合付勢機構１１による付勢によって当接するようにして回動トルクの変化をできるだけなくし、常に安定したフリーストップが実現し得るようにしている。
【００４３】
尚、本発明は、本実施例に限られるものではなく、各構成要件の具体的構成は適宜設計し得るものである。
【００４４】
【発明の効果】
本発明は上述のように構成したから、従来通り十分な閉じ付勢や凹凸係合保持機能が重合時に生じつつ、開放位置では係合保持されず自由に角度調整が行える画期的なヒンジ装置並びにヒンジ装置を用いた電子機器となる。
【００４５】
即ち、重合状態では、一箇所ではなく少なくとも二箇所での凹凸係合となるため、例えば極端に凹凸を深くしたり、係合傾斜面の傾斜をきつくしたり、係合付勢機構によるバネ付勢を強くしなくても十分な係合保持力が生じ、それでありながら開放位置では、従来と異なり凹凸係合しないため自由な開放角度にこのフリーストップによって自在に調整できることとなる画期的なヒンジ装置となる。
【００４６】
また、請求項３記載の発明においては、あえて第二の凸部の突出度を第一の凸部よりも小さくして、常に第一の凸部を回動抵抗を生じる主凸部としてこれのみが回動当接面に係合付勢機構による付勢によって当接するようにしたため、回動トルクの変化がほとんどなく、常に安定したフリーストップが実現し得る一層実用性に秀れた画期的なヒンジ装置となる。
【図面の簡単な説明】
【図１】本実施例の使用状態を示す斜視図である。
【図２】本実施例の説明分解斜視図である。
【図３】本実施例の斜視図である。
【図４】本実施例の断面図である。
【図５】本実施例のカム部の斜視図である。
【図６】本実施例のカム部の断面図である。
【図７】本実施例の（カム部の第一の凸部との関係をも示す）カム係合部の説明斜視図である。
【図８】本実施例の図７に対応させた使用状態の説明側面図である。
【符号の説明】
１操作部
２第一部材（本体部）
３ディスプレイ部
４第二部材（重合部）
５第一連結部（連結金具）
６回動軸部
７第二連結部（連結金具）
８軸受部
９カム部
９Ａ第一の凸部
９Ｂ第二の凸部
１０カム係合部
１０Ａ第一の凹部
１０Ｂ第二の凹部
１１係合付勢機構[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is, for example, a laptop or a word processor, or an electronic device such as a mobile phone, a main body portion having an operation portion and an overlapping portion serving as an opening and closing lid portion having a display portion can be freely opened and closed. The present invention relates to a hinge device used for pivoting and an electronic device.
[0002]
Problems to be solved by the prior art and the invention
For example, in a personal computer or a word processor called a notebook type, an opening / closing lid portion (overlapping portion) having a display portion is provided on a main body portion having an operation portion so as to be able to open and close freely via a hinge device. In order to prevent the opening / closing lid from being opened without permission when the opening / closing lid is closed on the main body, the hinge device is provided with a polymerization holding function for maintaining the closed state.
[0003]
That is, for example, a cam portion that is rotatable relative to each other around a rotation shaft portion of a hinge device and that rotates with the rotation of the main body portion or the overlap portion, and a cam that rotates with the rotation of the overlap portion or the main body portion An engagement portion, and when a closed overlap state is established, the projection portion provided on the cam portion and the recess portion provided on the cam engagement portion are engaged with the concave and convex portions so that this overlap state is engaged and held. To be configured.
[0004]
More specifically, for example, a rotation shaft portion is provided in a first connection portion connected to the main body portion or the overlap portion, and the rotation shaft portion is rotatably engaged with a second connection portion connected to the overlap portion or the main body portion. A cam portion having a convex portion that rotates with the rotating shaft portion is provided on the first connecting portion, and a cam engaging portion having a concave portion that rotates with the bearing portion is connected to the second connecting portion. And at least one of a cam portion and a cam engaging portion, which engages with the concave and convex portions by being relatively rotated, is slidably movable in the direction of engagement and disengagement along the rotating shaft portion. When at least one of the engaging portions is disengaged, an engagement urging mechanism is provided by a spring that urges in the engaging direction when the engaging portion moves in the separating direction, and the overlapping portion is relatively rotated with respect to the main body portion to close the overlapping portion. When it is in the state, the cam portion and the cam engaging portion are in the middle of uneven engagement, The engagement biasing mechanism by the spring is configured to hold the middle of the engagement and to be urged to close so that the overlapped closed state is engaged and held. One of the cam portion and the cam engagement portion is By rotating while moving in the separating direction against the engagement urging mechanism, the cam portion is disengaged from the cam engaging portion, and the overlapping portion can be relatively rotated with respect to the main body portion as it is. Constitute.
[0005]
By configuring the hinge device in this way, cumbersome operation such as providing a separate blockage holding device and unlocking the lock is unnecessary, and the state is overlapped, thereby automatically engaging the cam (concave and convex engagement). This overlapping state is engaged and held by the urging and the spring urging, and can be released by rotating as it is against this closing urging. In other words, in the superposed state, it is always urged in the closing direction (the direction of the superposed state) to be prevented from opening, and when it is desired to open and rotate, if it rotates against this urging force, the cam engages. And can be opened and rotated as it is.
[0006]
However, in the conventional cam engagement, generally, one cam portion is provided with a convex portion at a 180-degree symmetrical position, and the other cam engaging portion is provided with a concave portion to be engaged therewith at the same 180-degree symmetrical position. Each of the members is configured to be simultaneously engaged with each other while being urged by a spring by being rotated.
[0007]
Therefore, since the respective convex portions and concave portions are designed to be in the middle of the concave-convex engagement by the spring bias in the closed overlap state so that sufficient closing bias is generated, the convex and concave portions are released from the concave-convex engagement and released. When it is rotated in the direction of 180 degrees, the projection and the recess are completely engaged with each other again (click engagement) when they are opened by, for example, 160 to 170 degrees before being opened by 180 degrees. The state is configured to be held in engagement.
[0008]
Therefore, not only the closing bias is generated but also the engagement is maintained at the predetermined position in the open state, which is convenient, but conversely, the engagement is always maintained at the open position. Often.
[0009]
In other words, if the cam portion and the cam engaging portion are set so as to be in a free stop state where the hand is released at any position during the opening due to relative rotational friction caused by the bias of the spring between the cam portion and the cam engaging portion, a specific opening position is obtained. In many cases, it is more convenient that the angle of the overlapping portion can be freely adjusted and set by stopping at a desired open position.
[0010]
Therefore, attention has been paid to improving the configuration in which the closing urging or the concave / convex engaging / holding function occurs in the closed overlapping state as usual, but the concave / convex engaging / holding function does not occur in the open position (no click engagement).
[0011]
However, if only one convex portion and one concave portion are formed only on one side of each of the cam portion and the cam engaging portion, and only these are engaged with the concave and convex portions, the shaft must be rotated 360 degrees. It is possible to adopt a configuration in which click engagement is not performed at the open position because the concave / convex engagement is not performed again. Not enough.
[0012]
In addition, in order to increase the closing urging force due to the concave-convex engagement after only the concave-convex engagement at one place, the detachment force is increased by deepening the concave-convex, making the inclination tight, or increasing the spring force. On the contrary, problems such as the necessity of considerable rotation and the inability to smoothly rotate are caused.
[0013]
The present invention is an epoch-making method that solves such a problem, while a sufficient closing bias and a concave-convex engagement holding function are generated at the time of polymerization as in the past, and the angle can be freely adjusted without being held in the open position. It is an object to provide a hinge device and an electronic device using the hinge device.
[0014]
[Means for Solving the Problems]
The gist of the present invention will be described with reference to the accompanying drawings.
[0015]
A hinge device for rotatably connecting a first member and a second member to each other, wherein the hinge member is rotatable relative to each other around a rotation shaft. And a cam engaging portion 10 that rotates together with the rotation of the second member 4. A convex portion 9 A provided on the cam portion 9 and a concave portion 10 A provided on the cam engaging portion 10. In the hinge device, the rotation position is engaged and held by the concave and convex engagement, and the first concave portion 10A with which the first convex portion 9A provided on the cam portion 9 engages is connected to the cam. The first convex portion 9A and the first concave portion 10A are provided on the engaging portion 10 so as to be engaged or in the middle of engagement when the overlapping state is in the overlapping state. The second convex portion 9B and the second concave portion 10B which are engaged with or in the middle of engagement with the cam portion 9 and the second concave portion 10B. The second convex portion 9B has a smaller rotational width than the first concave portion 10A, and the second concave portion 10B has a smaller rotational width than the first convex portion 9A. When set short, the first and second convex portions 9A and 9B and the concave portions 10A and 10B are engaged or in the middle of engagement, respectively, in the overlapped closed state, but turned in the opening direction. At this time, the first convex portion 9A can pass through the second concave portion 10B without being dropped, and at this time, the second convex portion 9B is formed on the first concave portion 10A by the first convex portion 9A. The present invention relates to a hinge device characterized in that the hinge device is supported and floated and held by not engaging with falling.
[0016]
Also, a hinge device for pivotally connecting the first member 2 and the second member 4 and rotating the first member 2 relatively to the second member 4 in the opening direction from the overlapped closed state, The first connecting portion 5 connected to the one member 2 is provided with a rotating shaft portion 6, and the rotating shaft portion 6 is rotatably engaged with the second connecting portion 7 connected to the second member 4. And the first connecting portion 5 is provided with a cam portion 9 having a convex portion 9A that rotates with the rotary shaft portion 6 or a cam engaging portion 10 having a concave portion 10A, and a concave portion that rotates with the bearing portion 8. At least one of the cam engaging portion 10 having the projection 10A or the cam portion 9 having the convex portion 9A is provided on the second connecting portion 7, and at least one of the cam engaging portion 9 and the cam engaging portion 10 which engages with the concave and convex portions by being relatively rotated. Are provided so as to be slidable in the direction of engagement and disengagement. An engagement urging mechanism 11 is provided for urging the first member 2 and the second member 4 relative to each other when the first member 2 and the second member 4 are disengaged and displaced in the separating direction. In this state, the cam portion 9 and the cam engaging portion 10 are in the uneven engagement or in the middle of engagement, and this engagement is held by the engagement urging mechanism 11, and the overlapped closed state is held or closed. By rotating one of the cam portion 9 and the cam engaging portion 10 while moving the cam portion 9 and the cam engaging portion 10 in the separating direction against the engaging urging mechanism 11, On the other hand, in the hinge device in which the cam portion 9 is disengaged and the second member 4 is relatively rotated with respect to the first member 2, the first protrusion 9A provided on the cam portion 9 is A first concave portion 10A to be engaged is provided in the cam engaging portion 10, and the first convex portion 9 And the first concave portion 10A is configured to be engaged or in the middle of engagement when in the overlapped closed state, and the second convex portion is also engaged or in the middle of engagement in this overlapped closed state. 9B and a second concave portion 10B are provided in the cam portion 9 and the cam engaging portion 10, and the second convex portion 9B has a shorter rotation width than the first concave portion 10A and a second concave portion 10B. Is set to have a smaller width in the rotation direction than the first convex portion 9A, and in the overlapped closed state, both the first and second convex portions 9A and 9B and the two concave portions 10A and 10B are engaged or Although it is in the middle of engagement, when pivoted in the opening direction, the first convex portion 9A can pass through the second concave portion 10B without dropping, and at this time, the second convex portion 9B The first projection 9A is supported on the recess 10A of the The present invention relates to a hinge device configured to be held above.
[0017]
The hinge device according to any one of claims 1 and 2, wherein the protrusion of the first protrusion 9A is set to be larger than the protrusion of the second protrusion 9B. It is.
[0018]
Further, the main body 2 provided with the operation unit 1 and the overlap unit 4 provided with the display unit 3 are arranged so as to cover the operation unit 1 when the operation unit 1 is not operated. And a hinge device for rotatably connecting the main body portion 2 and the overlap portion 4 so that the operation portion 1 can be exposed by rotating the overlap portion 4 relatively from the above. The said main-body part 2 was made into the said 1st member 2 or the 2nd member 4, and the said superposition | polymerization part 4 was made into the said 2nd member 4 or the 1st member 2, The said any one of Claims 1-3. The present invention relates to an electronic device using the hinge device, wherein the hinge device is used.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.
[0020]
For example, when the second member 4 is relatively rotated with respect to the first member 2 to be in the overlapping state, the cam member 9 and the cam member 9 are pressed and urged by the engagement urging mechanism 11 about the rotation shaft 6. The first protrusion 9A of the cam portion 9 is in the first recess 10A of the cam engaging portion 10, and the second protrusion 9B of the cam portion 9 is in the cam engaging portion. The tenth second concave portion 10B is in the form of concave / convex engagement or in the middle of engagement.
[0021]
Therefore, the urging force of the engagement urging mechanism 11 and the urging force of the cam due to the suction force of the unevenness generate a rotational urging (closing urging) in the overlapping direction, and the urging mechanism 11 is urged. The superimposed state is maintained by the concave and convex engagement.
[0022]
At this time, since the concave and convex portions 9A, 9B, 10A and 10B are in the form of concave / convex engagement or in the middle of the concave / convex engagement as in the conventional case, for example, the concave / convex portions are extremely deepened, and the inclination of the engagement inclined surface is sharpened. Even if the spring urging by the engaging urging mechanism 11 is not strengthened, a sufficient engagement holding force is generated.
[0023]
When the second member 4 is relatively rotated in the opening direction with respect to the first member 2, one of the cam portion 9 and the cam engaging portion 10 is separated from the urging force of the engaging urging mechanism 11. In this case, the first convex portion 9A is disengaged from the first concave portion 10A and rotates along the contact surface of the cam engaging portion 10. , The second convex portion 9B also comes off from the second concave portion 10B and rotates. In this opening rotation, in the overlapping state, the first convex portion 9A reaches the second concave portion 10B with which the second convex portion 9B is engaged, but the second concave portion 10B is the first convex portion. Since the width in the rotation direction is smaller than that of 9A, the first protrusion 9A does not fall into and engage with the second recess 10B, and rotates while being bridged with respect to the second recess 10B. You will pass.
[0024]
The second projection 9B reaches the first recess 10A, but the second projection 9B is supported by the fact that the first projection 9A does not fall into the second recess 10B and is not engaged. (The first concave portion 10A has a wider width in the rotation direction than the second convex portion 9B), so that the second convex portion 9B does not fall into the first concave portion 10A but the first concave portion 10A. It is possible to rotate and pass while floating above.
[0025]
Therefore, unlike the related art, there is no uneven engagement at the open position.
[0026]
Therefore, by setting the rotational friction between the cam portion 9 and the cam engaging portion 10 by the urging by the engagement urging mechanism 11 so as to be appropriate, the rotation becomes smooth and at the position where the hand is released. A free stop in which the rotational position is held by this friction can be realized, and in the present invention, since the concave and convex engagement does not occur at the specific position of the open position as in the related art as described above, the free stop can be freely set at a free open angle. Can be adjusted.
[0027]
The friction for this free stop can be adjusted by the state of the rotation contact surface, the urging force of the engagement urging mechanism 11, and the like. If both parts 9B are designed to be in contact with each other, not only the case where only one part comes into pressure contact due to backlash or the like, but also the state where the second convex part 9B floats above the second concave part 10B as described above. Inevitably, only the first convex portion 9A comes into contact, so that the frictional state changes, whereby the rotational torque changes and the free stop may become unstable.
[0028]
Therefore, in the present invention, for example, the degree of protrusion of the second convex part 9B is made slightly smaller than that of the first convex part 9A, and only the first convex part 9A is always engaged with the rotational contact surface. The change in the rotational torque may be reduced as much as possible by the contact by the urging by the mechanism 11, so that a stable free stop can always be realized.
[0029]
【Example】
A specific embodiment of the present invention will be described with reference to the drawings.
[0030]
In this embodiment, as shown in FIG. 1, the present invention is applied to a laptop type notebook personal computer, in which a main body provided with a key operation unit 1 is used as a first member 2 and a display unit 3 (LCD) is used. The open / close lid (overlapping portion) provided is a second member 4, and the second member 4 is freely opened up to 180 degrees (use position) from a closed state where the first member 2 and the second member 4 overlap. The hinge device of the present invention is applied to a pivotable structure that can be used (this embodiment shows a case where the hinge device is provided on both the left and right sides).
[0031]
In the present embodiment, the first connecting portion 5 (connecting metal fitting) connected to the first member 2 (main body) is provided with the rotation shaft 6 in a detented state, and the first connecting portion 5 (connecting metal) is connected to the second member 4 (overlapping portion). A ring-shaped bearing portion 8 in which the rotation shaft portion 6 is rotatably inserted and engaged with the two connection portions 7 (connection metal fittings) is provided, and is rotated together with the first connection portion 5 and the rotation shaft portion 6. The first connecting portion 5 has a cam portion 9 having a convex portion 9A. That is, the cam portion 9 is fitted to the rotation shaft portion 6 of the first connecting portion 5 so as to be prevented from rotating in the axial direction.
[0032]
Further, a cam engaging portion 10 having a concave portion 10 </ b> A that rotates together with the bearing portion 8 is provided on the bearing portion 8 of the second connecting portion 7. That is, it may be formed integrally with the bearing portion 8, but is engaged with the bearing portion 8 in a non-rotating state on the side that is opposed to and engages with the cam portion 9, and a bearing hole through which the rotating shaft portion 6 is inserted. Are provided with a cam engaging portion 10 so as to communicate with each other.
[0033]
That is, the cam portion 9 that engages with the concave / convex portion by being relatively rotated with respect to the cam engaging portion 10 together with the rotating shaft portion 6 is provided so as to be slidable in the direction of engagement and disengagement, and the cam portion 9 is disengaged. In this case, an engagement urging mechanism 11 is provided that urges in the engagement direction when the actuator moves in the separating direction. Specifically, in the present embodiment, the plurality of disc springs 11A provided in a state of being fitted to the rotating shaft portion 6 by the pressing portion 12 are slidably fitted to the rotating shaft portion 6 while being prevented from rotating. This disc spring is used when the cam portion 9 is pressed to urge the cam portion 9 and the cam engaging portion 10 to engage and the cam portion 9 and the cam engaging portion 10 are disengaged from each other and rotate. It is configured to rotate against 11A.
[0034]
Therefore, when the overlapping portion 4 is rotated with respect to the main body 2, the bearing portion 8 provided in the overlapping portion 4 is rotated with respect to the rotation shaft 6 of the first connecting portion 5 provided in the main body 2. In other words, the cam engaging portion 10 provided in the bearing portion 8 in a non-rotating state rotates with respect to the cam portion 9 provided in the rotating shaft portion 6 in the non-rotating state.
[0035]
Accordingly, when the overlapping portion 4 is relatively rotated with respect to the main body 2 to be in the overlapping state, the cam portion 9 is pressed and urged by the disc spring 11A of the engagement urging mechanism 11 about the rotation shaft portion 6 as an axis. Relative rotation with respect to the cam engaging portion 10, the first convex portion 9A of the cam portion 9 is in the first concave portion 10A of the cam engaging portion 10, and the second convex portion 9B of the cam portion 9 is in the cam engaging portion. The second concave portion 10B of the joint portion 10 is in the process of engaging the concave and convex portions.
[0036]
Therefore, the urging force of the engagement urging mechanism 11 and the urging force of the cam due to the suction force of the unevenness generate a rotational urging (closing urging) in the overlapping direction, and the urging mechanism 11 is urged. The superimposed state is maintained by the concave and convex engagement.
[0037]
Further, in this embodiment, as described above, the first concave portion 10A with which the first convex portion 9A provided on the cam portion 9 engages is provided on the cam engaging portion 10, and the first convex portion 9A And the first recess 10A are configured to be in the middle of engagement when in the overlapped state, and the second projection 9B and the second recess are also in the middle of engagement in the overlapped state. 10B are provided in the cam portion 9 and the cam engaging portion 10 at approximately 180 ° contrast positions, respectively, and the second convex portion 9B has a shorter rotation width than the first concave portion 10A and a second convex portion 9B. The concave portion 10B is set to have a smaller width in the rotation direction than the first convex portion 9A, and the first and second convex portions 9A, 9B and both concave portions 10A, 10B are engaged in the overlapped closed state. Although it is halfway, when the first pivot 9A is rotated in the opening direction, the first convex 9A is The second convex portion 9B is configured to be supported and floated and held by the first convex portion 9A not falling into engagement with the first concave portion 10A at this time. I have. That is, in the superimposed state, the two concavo-convex portions 9A, 9B, 10A, and 10B are in the middle of the concavo-convex engagement as before, so that, for example, the concavo-convex portions are extremely deepened, the inclination of the engagement inclined surface is sharpened, Even if the urging of the spring by the urging mechanism 11 is not increased, a sufficient engagement holding force is generated.
[0038]
In opening rotation, the first convex portion 9A comes off the first concave portion 10A and rotates along the contact surface of the cam engaging portion 10, and the second convex portion 9B also moves to the second concave portion. It turns out from 10B and turns. In this opening rotation, in the overlapping state, the first convex portion 9A reaches the second concave portion 10B with which the second convex portion 9B is engaged, but the second concave portion 10B is the first convex portion. Since the width in the rotation direction is smaller than that of 9A, the first protrusion 9A does not fall into and engage with the second recess 10B, and rotates while being bridged with respect to the second recess 10B. You will pass.
[0039]
The second projection 9B reaches the first recess 10A, but the second projection 9B is supported by the fact that the first projection 9A does not fall into the second recess 10B and is not engaged. (The first concave portion 10A has a wider width in the rotation direction than the second convex portion 9B), so that the second convex portion 9B does not fall into the first concave portion 10A but the first concave portion 10A. It is possible to rotate and pass while floating above.
[0040]
Therefore, unlike the related art, there is no uneven engagement at the open position.
[0041]
Therefore, by setting the rotational friction between the cam portion 9 and the cam engaging portion 10 by the urging by the engagement urging mechanism 11 so as to be appropriate, the rotation becomes smooth and at the position where the hand is released. A free stop in which the rotational position is held by this friction can be realized, and since the concave and convex engagement does not occur at the specific position of the open position as in the conventional case as described above, the free stop can be freely adjusted to a free open angle. It becomes.
[0042]
In this embodiment, the degree of protrusion of the first protrusion 9A is set to be greater than the degree of protrusion of the second protrusion 9B. That is, the degree of protrusion of the second protrusion 9B is made slightly smaller than that of the first protrusion 9A, and only the first protrusion 9A is constantly biased by the engagement biasing mechanism 11 on the rotation contact surface. As a result, a change in the rotation torque is minimized so that a stable free stop can always be realized.
[0043]
It should be noted that the present invention is not limited to the present embodiment, and a specific configuration of each component can be appropriately designed.
[0044]
【The invention's effect】
Since the present invention is configured as described above, an epoch-making hinge device capable of freely adjusting the angle without engaging and holding at the open position, while a sufficient closing bias and uneven engagement holding function is generated during polymerization as in the past. In addition, the electronic device uses a hinge device.
[0045]
That is, in the superimposed state, since the unevenness is engaged at at least two places instead of one place, for example, the unevenness is extremely deepened, the inclination of the engagement inclined surface is made tight, or the spring is provided by the engagement urging mechanism. Even if the force is not increased, sufficient engagement holding force is generated, and yet, in the open position, unlike the conventional case, uneven engagement does not occur, so that the free stop can be freely adjusted to a free open angle by an innovative method. It becomes a hinge device.
[0046]
In the third aspect of the present invention, the degree of protrusion of the second convex part is made smaller than that of the first convex part, and the first convex part is always used as the main convex part that generates rotational resistance. Is made to come into contact with the rotation contact surface by the urging force of the engagement urging mechanism, so there is almost no change in the rotation torque, and an even more practical breakthrough that can always achieve a stable free stop. Hinge device.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a use state of the present embodiment.
FIG. 2 is an explanatory exploded perspective view of the present embodiment.
FIG. 3 is a perspective view of the present embodiment.
FIG. 4 is a sectional view of the present embodiment.
FIG. 5 is a perspective view of a cam portion according to the embodiment.
FIG. 6 is a cross-sectional view of a cam portion according to the present embodiment.
FIG. 7 is an explanatory perspective view of a cam engaging portion (also showing a relationship with the first convex portion of the cam portion) of the present embodiment.
FIG. 8 is an explanatory side view of a use state corresponding to FIG. 7 of the present embodiment.
[Explanation of symbols]
1 operation unit 2 first member (main unit)
3 Display unit 4 Second member (overlapping unit)
5 first connection part (connection metal fittings)
6 Rotating shaft part 7 Second connecting part (connecting fitting)
8 Bearing part 9 Cam part 9A First convex part 9B Second convex part 10 Cam engaging part 10A First concave part 10B Second concave part 11 Engaging urging mechanism

Claims

A hinge device for rotatably connecting a first member and a second member, wherein a cam portion which is provided to be rotatable relative to each other about a rotation shaft portion and which rotates together with the rotation of the first member. A cam engaging portion that rotates with the rotation of the second member, and a convex portion provided on the cam portion and a concave portion provided on the cam engaging portion engage with the concave and convex portions to rotate the cam member. In the hinge device configured to be engaged and held, a first concave portion with which a first convex portion provided on the cam portion is engaged is provided in the cam engaging portion, and the first convex portion and the first concave portion are provided. The one concave portion is configured to be engaged or engaged during the overlapped state, and the second convex portion and the second engaged portion are also engaged or engaged during the overlapped state. The concave portion is provided in the cam portion and the cam engaging portion, and the second convex portion has a rotation direction width shorter than that of the first concave portion. The second concave portion is set to have a smaller width in the rotation direction than the first convex portion, and in the overlapped state, both the first and second convex portions and the two concave portions are engaged or engaged, respectively. Although it is halfway, when rotating in the opening direction, the first convex portion can pass without falling into the second concave portion, and at this time, the second convex portion is on the first concave portion. The hinge device according to claim 1, wherein the first convex portion is supported and floated and held by not falling into engagement.

A hinge device that pivotally connects a first member and a second member, and relatively rotates the first member relative to the second member in an opening direction from an overlapped closed state. A pivot portion is provided at one connection portion, a bearing portion at which the pivot portion is rotatably engaged is provided at a second connection portion connected to the second member, and the pivot shaft is provided at the first connection portion. A cam portion having a convex portion or a cam engaging portion having a concave portion which rotates together with the portion is provided, and a cam engaging portion having a concave portion or a cam portion having a convex portion which rotates together with the bearing portion is provided on the second connecting portion. At least one of a cam portion and a cam engaging portion that engages and recesses by the relative rotation is provided so as to be slidable in the direction of engagement and disengagement. The engagement urging mechanism that urges in the engagement direction when moved in the separation direction However, when the first member and the second member are relatively rotated to be in the overlapped closed state, the cam portion and the cam engaging portion are in uneven engagement or in the middle of engagement, and the engagement bias is The mechanism is configured to hold this engagement and hold or bias the overlapped closed state, and either the cam portion or the cam engaging portion is moved away from the engagement biasing mechanism. A hinge device configured to disengage the cam portion with respect to the cam engagement portion by rotating the cam member while moving the cam member, and to relatively rotate the second member with respect to the first member; A first concave portion is provided on the cam engaging portion to be engaged with the first convex portion provided on the cam engaging portion. And in the same manner, in the state of engagement or in the middle of the engagement in this overlapped closed state. A second convex portion and a second concave portion are provided on the cam portion and the cam engaging portion, and the second convex portion has a shorter rotating width than the first concave portion, and the second concave portion has When the width in the rotation direction is set to be shorter than that of the first protrusion, the first and second protrusions and the two recesses are engaged or in the middle of engagement in the overlapped closed state. When pivoted in the direction, the first convex portion can pass through the second concave portion without falling, and at this time, the second convex portion has the first convex portion on the first concave portion. A hinge device, wherein the hinge device is configured to be supported and levitated and held by not engaging with a fall.

The hinge device according to claim 1, wherein a degree of protrusion of the first protrusion is set to be larger than a degree of protrusion of the second protrusion.

The main body portion provided with the operation portion and the overlap portion provided with the display portion are arranged so as to cover the operation portion when the operation portion is not operated, and the overlap portion is relatively displaced from this overlapped state. A hinge device for rotatably connecting the main body portion and the overlapping portion so that the operation portion can be exposed by rotating, and the hinge device includes the main body portion as the first member or An electronic device using a hinge device, wherein the hinge device according to any one of claims 1 to 3 is used as a second member, and the overlapping portion is the second member or the first member. .