JP3641653B2

JP3641653B2 - Nakadome of the band

Info

Publication number: JP3641653B2
Application number: JP17723096A
Authority: JP
Inventors: 康友椎名; 征司梅澤; 幸司島
Original assignee: Citizen Watch Co Ltd
Current assignee: Citizen Watch Co Ltd
Priority date: 1996-06-19
Filing date: 1996-06-19
Publication date: 2005-04-27
Anticipated expiration: 2016-06-19
Also published as: JPH105015A

Description

【０００１】
【発明の属する技術分野】
本発明は、腕時計用バンド、ブレスレット等の装飾具に的するバンドの中留に関する。
【０００２】
【従来の技術】
バンドの一端に係止部材を固着し、バンドの他端に、この係止部材と係止可能な可動係止部材を内蔵する止具本体を取り付け、押圧操作によって係止部材と可動係止部材の係合を解除するプッシュボタンを止具本体に設け、止具本体の外側に枠体を回動可能に装着し、枠体を倒したときにプッシュボタンを押圧できないようにしたバンドの中留が実公昭６１−４２４０６号公報、実公昭６１−４２４０５号公報、実行並５−４５２１０号公報等に開示されている。
【０００３】
これらの中留によれば、枠体を倒すことによってプッシュボタンの没入を規制し、これにより、係止部材と可動係止部材とが離脱してバンドが脱落するのを防ぐことができる。
しかし、バンドを外すときに、枠体を手動によって引き起こさなければならないので操作が面倒であって、係止部材と可動係止部材の係合をワンタッチで解除できるようにしてもあまり意味がない。また、枠体は係止止具の側に係止されていないため、使用中に震動等により枠体が回動してプッシュボタンに対する規制がなくなってしまう虞がある。
【０００４】
【発明が解決しようとする課題】
本発明は、一方の係止具と他方の係止具及び一方の係止具とセフティーカバーをそれぞれ確実に固定することができ、簡単な操作で容易に取り外すことができるバンドの中留を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明のバンドの中留は、バンド装着部を有する一方の係止具と、バンド装着部を有する他方の係止具と、前記他方の係止具に回動自在に取り付けられると共に、前記一方の係止具が前記他方の係止具に係止されたとき前記一方の係止具の表面に重合可能なセフティーカバーと、前記一方の係止具と他方の係止具とに設けられてこれらを係合する第１の係合手段と、押圧操作によって第１の係合手段の係合を解除する前記一方の係止具に設けられた第１のプッシュボタンと、前記一方の係止具と他方の係止具とに設けられ、前記セフティーカバーが一方の係止具の表面に重合された状態で、前記一方の係止具とセフティーカバーとを係合する第２の係合手段と、押圧操作によって第２の係合手段の係合を解除する前記一方の係止具に設けられた第２のプッシュボタンとを備え、前記セフティーカバーは、前記一方の係止具の表面に重合された時に、第１のプッシュボタンが嵌合する凹部を有する。
【０００６】
一方の係止具と他方の係止具及びセフティーカバーと一方の係止具が、第１の係合手段及び第２の係合手段を介してそれぞれ個別に確実に係合される。
セフティーカバーを他方の係止具に係止された一方の係止具の表面に重合することにより、第１のプッシュボタンの移動を規制して、一方の係止具と他方の係止具の不意の離脱を防ぐ。
第１のプッシュボタン及び第２のプッシュボタンを押圧操作することによって、一方の係止具と他方の係止具及びセフティーカバーと一方の係止部材の係合がいずれもワンタッチで簡単に解除される。
【０００７】
セフティーカバーが、他方の係止具に係止された一方の係止具の表面から遠ざかる方向に付勢されることは、第２の係合手段を係合解除するだけで、セフティーカバーが一方の係止具の表面から押し上げられ、これにより、第１のプッシュボタンの規制が解けるので望ましい。
【０００８】
他方の係止具を、そのバンド装着部の反対端を一方の係止具の裏面に枢着すると共に、中間部において折り畳み自在とすることは、止具を外したときにバンドの端部間が連結されるので、バンド落下の事故を防ぐことができて望ましい。
【０００９】
第１及び第２の係合手段を、一方の係止具の内部に近接離間自在に配置されると共に、接近方向に付勢された一対の係止片と、該一対の係止片の間に抜挿され、接近状態の一対の係止片に係合される他方の係止具及びセフティーカバーにそれぞれ設けられた係合突起とから構成することは、セフティーカバー、一方の係止具及び他方の係止具を重ねて押し付けるだけで、第１及び第２の係合手段を係合することができるので望ましい。
【００１０】
第１の係合手段の係合突起が他方の係止具の表面に設けられ、第１の係合手段の係合突起を挿入する開口部が、一方の係止具の裏面に、第１の係合手段の一対の係止片間に臨むように形成され、第２の係合手段の係合突起がセフティーカバーの裏面に設けられ、該第２の係合手段の係合突起を挿入する開口部が、一方の係止具の表面に、第２の係合手段の一対の係止片間に臨むように形成されることある。
【００１１】
一方の係止具の表面に、セフティーカバーが嵌合される溝を形成することは、中留の表面が滑らかになって外観がすっきりすると共に、薄型化されるので望ましい。
【００１２】
【発明の実施の形態】
図１乃至図４は、三ッ折式の腕時計用バンドの中留１を示す。
バンドの中留１はステンレス、アルミニウム合金、チタン、チタン合金等の金属を素材とし、バンド２の一端に装着される一方の係止具３と、バンド２の他端に装着される他方の係止具４と、バンド２の他端に回動自在に取り付けられてバンド２を跨ぐ枠状のセフティーカバー５とを備える。
【００１３】
一方の係止具３は、図２に示すように、長手方向に沿って表面凸に湾曲するカバー状に形成される。図４及び図７に示すように、一方の係止具３の長手方向中間部の裏面には、凸状部６が一体に形成され、凸状部６の長手方向一側にバンド挿入凹部７が形成されると共に、長手方向他側にピン嵌合凹部８が形成される。また、一方の係止具３の両側壁には、バンド挿入凹部７に向けて、バンド２の一端と一方の係止具３とを軸着する取り付けピン（図示せず）を挿通するための貫通孔９が穿設されてバンド装着部とされている。
【００１４】
図３に示すように、一方の係止具３の表面には、セフティーカバー５を嵌合する溝１０が形成されている。この溝１０は、長手方向一方に凸に湾曲した平面形状を有する。
また、凸状部６の裏面中央に形成した凹部６ａには、図４に示すように、凹部６ａから突出する中空管１７を有する支持体１７ａが幅方向に沿って設けられ，ピン１７ｂ，１７ｂで支持されている。
【００１５】
図１及び図３に示すように、凸状部６の長手方向他側部に、それぞれ幅方向に沿って摺動する一対の係止片１１，１１が内蔵される。図５に示すように、係止片１１，１１の外側端部は凸状部６から外方に突出して第１のプッシュボタン１２となっている。
係止片１１，１１の内側端部は幅狭く形成されると共に、一対の係止片１１，１１がすれ違うように幅方向中心を通過して延びており、その先端が互いに接近するようにＬ状に形成されてそれぞれ係合部１３が形成されている。左右の係合部１３はやや間隔をあけて対向配置され、その対向縁の表面側が切欠かれて段部１４が形成されると共に、段部１４の反対側は傾斜面とされている。
【００１６】
左右の係止片１１，１１の側縁において、対向する係止片１１の係合部１３の先端とプッシュボタン１２とにそれぞれ係合段部２６が形成される。また、一方の係止片１１のプッシュボタン１２に形成された係合段部２６と他方の係止片１１の係合部１３先端に形成された係合段部２６との間にコイルバネ１５が介在される。そして、このコイルバネ１５によって、両側の係合部１３は幅方向中心部に向かって、すなわち互いに接近する方向に付勢されると共に、第１のプッシュボタン１２は凸状部６から突出するように付勢されている。
また、左右の係止片１１，１１の係合段部２６と反対の側縁に凹陥部２７が形成されると共に、凸状部６に固定されたストッパーねじ２８が凹陥部２７に係合される。このストッパーねじ２８は、常態において、凹陥部２７の係合部１３寄りの縁に当接している。
【００１７】
そして、第１のプッシュボタン１２を押圧すると、コイルバネ１５が押し縮められて左右の係合部１３が遠ざかるが、凹陥部２７のプッシュボタン１２寄りの縁がストッパーねじ２８に当接した位置でそれ以上の移動が規制される。また、第１のプッシュボタン１２を放すと、コイルバネ１５の付勢力によって係止片１１，１１が元の位置に復帰し、左右の係合部１３が再び接近するようになっている。
さらに、図４に示すように、凸状部６の裏面において、左右の係合部１３の間に臨む位置に開口部１６が穿設される。
【００１８】
図１及び図３に示すように、凸状部６の凹部６ａを挟む長手方向一側部にも係止片１１，１１とほぼ同じ構成の一対の係止片１１ａ，１１ａが内蔵される。係止片１１ａ，１１ａの外側端部は凸状部６の外方に突出して第２のプッシュボタン１２ａとなっている。
なお、係止片１１ａ，１１ａの係合部１３ａは裏面側が切欠かれて段部１４ａが形成され、左右の係合部１３ａの間に臨む開口部１６ａは、凸状部６の表面において溝１０の底部に穿設される。
【００１９】
図３及び図４に示すように、他方の係止具４は、バンド２の他端に取付けられる外枠１８と、一方の係止具３の裏面に枢着される中板１９とを有する。
外枠１８は、長手方向に沿って表面凸に湾曲され、その長手方向一端の両側に取り付けピン支持脚２０がそれぞれ設けられる。また、外枠１８の長手方向他端から一端寄りにかけて中板１９が嵌合される切欠溝２１が形成される。
【００２０】
外枠１８の長手方向一端部の表面に、先端が径大の係合突起２２が形成される。この係合突起２２は、一方の係止具３に内蔵される一対の係止片１１，１１と共に第１の係合手段を構成する。
【００２１】
中板１９は、外枠１８と同じ曲率で湾曲され、切欠部２１に嵌合された時に、外枠１８と同一の湾曲面に含まれるようになっている。また、中板１９の一端は切欠溝２１の先端に挿入されて、外枠１８の他端にピン２３を介して回動自在に枢着される。さらに、中板１９の他端に形成された凹溝は中空管１７に嵌合され、中空管１７に挿通されるピン２３´を介して、中板１９の他端が一方の係止具３の裏面に回動自在に接合される。
従って、一方の係止具３と中板１９と外枠１８は、一方の係止具３を最も表にして三ッ折状に折り畳むことができる。なお、一方の係止具３、中板１９及び外枠１８を折り畳んだとき、外枠１８の係合突起２２は一方の係止具３の裏面に形成された開口部１６に臨むようになっている。
【００２２】
セフティーカバー５は、基端が外枠１８の取り付けピン支持脚２０の外側に取り付けられる左右の側壁２４と、側壁２４の先端間に架設される橋架部２５を有する。
そして、側壁２４の先端及び取り付けピン支持脚２０にバンド装着部となる取り付けピン３０が挿通されて、セフティーカバー５が外枠１８に回動自在に取付けられる。なお、取り付けピン３０の両端部にはコイルバネ３１が装着されてその一端が取り付けピン支持脚２０に、またその他端が側壁２４に固定され、このコイルバネ３１によってセフティーカバー５が外枠１８から遠ざかるように付勢されている。
【００２３】
図２に示すように、側壁２４の下部には凹部２９が形成される。この凹部２９は、セフティカバー５の橋架部２５を一方の係止具３の溝１０に嵌合した時、第１のプッシュボタン１２に嵌合するようになっている。凹部２９が第１のプッシュボタン１２に嵌合すると、側壁２４の厚みによって、指の腹で第１のプッシュボタン１２は凸状部６内に移動させることができない。
【００２４】
また、第４図に示すように、橋架部２５の頂部裏面には、先端が径大の係合突起２２ａが形成される。この係合突起２２ａは、一方の係止具３に内蔵される他の一対の係止片１１ａ，１１ａと共に第２の係合手段を構成する。なお、セフティーカバー５を一方の係止具３の表面に被せたとき、係合突起２２ａは一方の係止具３の表面に形成された開口部１６ａに臨むようになっている。
【００２５】
バンドの中留１は、次のように使用される。
バンド２の一端が一方の係止具３のバンド挿入凹部７に差し込まれ、バンド２の一端部及び貫通孔９に図示しない取り付けピンを挿通して、一方の係止具３がバンド２の一端に回動自在に取付けられる。
また、バンド２の他端が外枠１８の取り付けピン支持脚２０の間に挿入されて取り付けピン３０によって取り付けられる。
【００２６】
バンドの中留１を係止するときは、図１及び図２に示すように、他方の係止具４を折り畳んで中板１９を外枠１８の切欠溝２１に嵌合し、折り畳まれた他方の係止具４を一方の係止具３の裏面に重ねて止具１を三ッ折にする。三ッ折にした状態では、外枠１８の取り付けピン支持脚２０、側壁２４の基端内側部及び取り付けピン３０は一方の係止具３のピン嵌合凹部８に嵌合する。
【００２７】
そして、一方の係止具３を裏面側に押圧すると、図６に示すように、外枠１８の係合突起２２が開口部１６の内部に挿入され、係合突起２２の先端が対向する係合部１３を押し分けてその下方まで進入する。係合突起２２の最大径の部分が係合部１３の最も張り出した部分を通過すると、係止片１１，１１はコイルバネ１５の弾発力によって元の位置に復帰し、係合突起２２の先端部が段部１４に係合する。この結果、係合突起２２及び係止片１１，１１で構成される第１の係合手段を介して一方の係止具３と他方の係止具４が係合される。
【００２８】
次いで、セフティーカバー５を一方の係止具３の表面に折り重ねて、橋架部２５を一方の係止具３の溝１０に嵌合する。さらに、セフティーカバー５を裏面側に押圧すると、第１の係合手段と同様に、係合突起２２ａが開口部１６ａ内に挿入され、係合突起２２ａ及び係止片１１ａ，１１ａで構成される第２の係合手段が係合され、一方の係止具３とセフティーカバー５とが係止される。
また、この状態では、凹部２９が第１のプッシュボタン１２の周囲を囲むように嵌合されるので、止具１の側面が物に当たったりしても第１のプッシュボタン１２が凸状部６の内部に移動することがなく、このため、一方の係止具３と他方の係止具４との係合が外れる心配がない。
【００２９】
バンドの中留１は次のようにして外すことができる。
まず、第２のプッシュボタン１２ａを指で押して凸状部６の内部に向けて移動すると、係止片１１ａ，１１ａの係合部１３ａ，１３ａが遠ざかる。すると、係合突起２２ａがフリーになって第２の係合手段が解除され、取り付けピン３０に装着されたバネ３１によりセフティーカバー５が跳ね上げられる。セフティーカバー５が開くと、凹部２９に嵌合されていた第１のプッシュボタン１２が露出する。
次に、第１のプッシュボタン１２を押して第２の係合手段と同様に第１の係合手段を解除し、一方の係止具３を他方の係止具４から引き起こす。
【００３０】
なお、本発明のバンドの中留は、三ッ折式とせず、一方の係止具と他方の係止具が分離されるタイプのものであっても良い。
また、本発明の中留で係止されるバンドは腕時計用に限定されず、ブレスレット等の装身具にも使用できる。
【００３１】
【発明の効果】
請求項１の構成によれば、一方の係止具と他方の係止具及びセフティーカバーと一方の係止具が、それぞれ個別に確実に係合されるので、安全性が高い。
また、セフティーカバーが一方の係止具の表面に重合されているときは、第１のプッシュボタンが係合解除する方向に移動することがないので、使用中に中留が物に当たったりしても、不意に中留が外れてバンドが落下する心配がない。さらに、第１のプッシュボタン及び第２のプッシュボタンを押圧操作することによって、一方の係止具と他方の係止具及びセフティーカバーと一方の係止部材の係合をいずれもワンタッチで簡単に解除することが可能である。
【００３２】
請求項２の構成によれば、第２のプッシュボタンを押して第２の係合手段を係合解除すると、セフティーカバーが自動的に跳ね上げられて第１のプッシュボタンの規制が解除されるので、中留を簡単に外すことができる。
【００３３】
請求項３の構成によれば、中留を外してもバンドの端部間が連結されているので、バンド落下の事故を防ぐことができる。
【００３４】
請求項４の構成によれば、セフティーカバー、一方の係止具及び他方の係止具を重ねて押し付けるだけで、第１及び第２の係合手段を容易に係合することができる。
【００３５】
請求項６の構成によれば、中留を係止した状態では、表面に凹凸が形成されずに外観がすっきりすると共に、薄型化されるので、意匠的に優れているばかりか、邪魔にならずに使い勝手が良い。
【図面の簡単な説明】
【図１】本発明の実施形態を示すバンドの中留の係止時の平面図
【図２】同上の側面図
【図３】係合を解除したバンドの中留の表面図
【図４】同上の裏面図
【図５】第１及び第２の係合手段の表面図
【図６】同上の要部側面図
【図７】一方の係止具の端面図
【符号の説明】
１バンドの中留
２バンド
３一方の係止具
４他方の係止具
５セフティーカバー
６凸状部
７バンド嵌合凹部
８ピン嵌合凹部
９貫通孔（バンド装着部）
１０溝
１１，１１ａ係止片
１２第１のプッシュボタン
１２ａ第２のプッシュボタン
１３，１３ａ係合部
１４，１４ａ段部
１５コイルバネ
１６，１６ａ開口部
１７中空管
１８外枠
１９中板
２０ピン支持脚
２１切欠溝
２２，２２ａ係合突起
２３，２３´ ピン
２４側壁
２５橋架部
２６係合段部
２７凹陥部
２８ストッパーねじ
２９凹部
３０取り付けピン（バンド装着部）
３１コイルバネ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a band retainer for a decorative tool such as a wristwatch band or a bracelet.
[0002]
[Prior art]
A locking member is fixed to one end of the band, and a stopper body containing a movable locking member that can be locked with the locking member is attached to the other end of the band, and the locking member and the movable locking member are pressed by a pressing operation. A push button for releasing the engagement of the band is provided on the fastener body, the frame is rotatably mounted on the outside of the fastener body, and the pushbutton cannot be pressed when the frame is tilted. Are disclosed in Japanese Utility Model Publication No. 61-42406, Japanese Utility Model Publication No. 61-42405, Japanese Utility Model Publication No. 5-45210, and the like.
[0003]
According to these middle ends, it is possible to prevent the push button from being immersed by tilting the frame body, thereby preventing the locking member and the movable locking member from detaching and the band from falling off.
However, when removing the band, the frame has to be manually raised, so that the operation is troublesome, and it does not make much sense to be able to release the engagement between the locking member and the movable locking member with one touch. Further, since the frame body is not locked to the locking stopper side, there is a possibility that the frame body is rotated due to vibration or the like during use and the restriction on the push button is lost.
[0004]
[Problems to be solved by the invention]
The present invention provides a band retainer that can securely fix one locking tool, the other locking tool, and one locking tool and the safety cover, and can be easily removed by a simple operation. The purpose is to do.
[0005]
[Means for Solving the Problems]
The band retainer of the present invention is rotatably attached to one locking tool having a band mounting part, the other locking tool having a band mounting part, and the other locking tool. A safety cover that can be superposed on the surface of the one locking tool, and the one locking tool and the other locking tool when the locking tool is locked to the other locking tool. A first engaging means for engaging them, a first push button provided on the one locking tool for releasing the engagement of the first engaging means by a pressing operation, and the one locking And a second engaging means for engaging the one locking tool and the safety cover in a state where the safety cover is superposed on the surface of the one locking tool. And provided on the one locking tool for releasing the engagement of the second engagement means by a pressing operation. And a second push button, the safety deposit cover, when the polymerized on the surface of one of the locking tool has a recess in which the first push button is fitted.
[0006]
One locking tool, the other locking tool, the safety cover, and the one locking tool are individually and reliably engaged via the first engaging means and the second engaging means.
By superposing the safety cover on the surface of one of the locking devices locked to the other locking device, the movement of the first push button is restricted, and the one locking device and the other locking device Prevent unexpected withdrawal.
By pressing the first push button and the second push button, the engagement of one locking tool, the other locking tool, the safety cover, and the one locking member can be easily released with one touch. The
[0007]
When the safety cover is biased in the direction away from the surface of one of the locking devices locked to the other locking device, the safety cover can be moved only by releasing the second engagement means. It is desirable that the first push button can be released by being pushed up from the surface of the locking tool.
[0008]
The other locking tool is pivotally attached to the back of one locking tool at the opposite end of the band mounting part, and can be folded at the middle part between the band ends when the locking tool is removed. Since it is connected, it is desirable to prevent the accident of dropping the band.
[0009]
The first and second engaging means are disposed in one locking tool so as to be close to and away from each other and between the pair of locking pieces biased in the approaching direction and the pair of locking pieces. And the other engaging tool and the engaging protrusion provided on the safety cover respectively to be engaged with the pair of engaging pieces in the approaching state, the safety cover, the one engaging tool and It is desirable that the first and second engaging means can be engaged simply by overlapping and pressing the other locking tool.
[0010]
An engagement projection of the first engagement means is provided on the surface of the other locking tool, and an opening for inserting the engagement protrusion of the first engagement means is formed on the back surface of the one locking tool. The engagement protrusion of the second engagement means is provided on the back surface of the safety cover, and the engagement protrusion of the second engagement means is inserted. The opening to be formed may be formed on the surface of one of the locking tools so as to face between the pair of locking pieces of the second engaging means.
[0011]
Forming a groove into which the safety cover is fitted on the surface of one of the locking members is desirable because the surface of the middle end is smooth, the appearance is clean, and the thickness is reduced.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show a middle fold 1 of a three-fold wristwatch band.
The band retainer 1 is made of a metal such as stainless steel, aluminum alloy, titanium, titanium alloy, etc., and one locking tool 3 attached to one end of the band 2 and the other engagement attached to the other end of the band 2. A stopper 4 and a frame-shaped safety cover 5 that is rotatably attached to the other end of the band 2 and straddles the band 2 are provided.
[0013]
As shown in FIG. 2, one of the locking tools 3 is formed in a cover shape that is curved in a convex surface along the longitudinal direction. As shown in FIGS. 4 and 7, a convex portion 6 is integrally formed on the back surface of the intermediate portion in the longitudinal direction of one of the locking tools 3, and the band insertion concave portion 7 is formed on one side in the longitudinal direction of the convex portion 6. Is formed, and a pin fitting recess 8 is formed on the other side in the longitudinal direction. Also, mounting pins (not shown) for axially attaching one end of the band 2 and the one locking tool 3 to the band insertion recess 7 are inserted into both side walls of the one locking tool 3. A through hole 9 is drilled to form a band mounting portion.
[0014]
As shown in FIG. 3, a groove 10 for fitting the safety cover 5 is formed on the surface of one of the locking tools 3. The groove 10 has a planar shape curved convexly in one longitudinal direction.
Further, as shown in FIG. 4, a support body 17a having a hollow tube 17 protruding from the recess 6a is provided along the width direction in the recess 6a formed in the center of the back surface of the convex portion 6, and pins 17b, 17b.
[0015]
As shown in FIGS. 1 and 3, a pair of locking pieces 11, 11 that slide along the width direction are incorporated in the other side in the longitudinal direction of the convex portion 6. As shown in FIG. 5, the outer end portions of the locking pieces 11, 11 project outward from the convex portion 6 to form a first push button 12.
The inner end portions of the locking pieces 11 and 11 are formed with a narrow width and extend through the center in the width direction so that the pair of locking pieces 11 and 11 pass each other. The engaging portions 13 are formed in a shape. The left and right engaging portions 13 are arranged to face each other with a slight gap therebetween, and a stepped portion 14 is formed by notching the surface side of the facing edge, and the opposite side of the stepped portion 14 is an inclined surface.
[0016]
At the side edges of the left and right locking pieces 11, 11, engagement step portions 26 are respectively formed at the front ends of the engaging portions 13 of the opposing locking pieces 11 and the push buttons 12. In addition, the coil spring 15 is provided between the engaging step portion 26 formed on the push button 12 of one locking piece 11 and the engaging step portion 26 formed at the tip of the engaging portion 13 of the other locking piece 11. Intervened. The coil spring 15 urges the engaging portions 13 on both sides toward the center in the width direction, that is, in a direction approaching each other, and the first push button 12 protrudes from the convex portion 6. It is energized.
In addition, a concave portion 27 is formed on the side edge opposite to the engaging step portion 26 of the left and right locking pieces 11, 11, and a stopper screw 28 fixed to the convex portion 6 is engaged with the concave portion 27. The The stopper screw 28 is in contact with the edge of the recessed portion 27 near the engaging portion 13 in a normal state.
[0017]
When the first push button 12 is pressed, the coil spring 15 is compressed and the left and right engaging portions 13 move away, but at the position where the edge of the recessed portion 27 near the push button 12 is in contact with the stopper screw 28. The above movement is restricted. Further, when the first push button 12 is released, the locking pieces 11 and 11 return to their original positions by the biasing force of the coil spring 15, and the left and right engaging portions 13 approach again.
Furthermore, as shown in FIG. 4, an opening 16 is formed in a position facing the left and right engaging portions 13 on the back surface of the convex portion 6.
[0018]
As shown in FIGS. 1 and 3, a pair of locking pieces 11 a and 11 a having substantially the same configuration as the locking pieces 11 and 11 are also incorporated in one side in the longitudinal direction across the concave portion 6 a of the convex portion 6. The outer ends of the locking pieces 11a, 11a protrude outward from the convex portion 6 to form a second push button 12a.
The engaging portions 13a of the locking pieces 11a, 11a are notched on the back side to form stepped portions 14a, and the opening portions 16a facing the left and right engaging portions 13a are grooves 10 on the surface of the convex portion 6. Is drilled in the bottom.
[0019]
As shown in FIGS. 3 and 4, the other locking tool 4 has an outer frame 18 attached to the other end of the band 2 and an intermediate plate 19 pivotally attached to the back surface of the one locking tool 3. .
The outer frame 18 is curved to have a convex surface along the longitudinal direction, and mounting pin support legs 20 are provided on both sides of one end in the longitudinal direction. Further, a notch groove 21 into which the intermediate plate 19 is fitted is formed from the other end in the longitudinal direction of the outer frame 18 toward the one end.
[0020]
An engaging protrusion 22 having a large tip is formed on the surface of one end portion in the longitudinal direction of the outer frame 18. The engaging protrusion 22 constitutes a first engaging means together with a pair of locking pieces 11, 11 built in one locking tool 3.
[0021]
The intermediate plate 19 is curved with the same curvature as that of the outer frame 18, and is included in the same curved surface as the outer frame 18 when fitted into the notch 21. Further, one end of the intermediate plate 19 is inserted into the tip of the notch groove 21 and pivotally attached to the other end of the outer frame 18 via a pin 23. Further, the concave groove formed at the other end of the intermediate plate 19 is fitted into the hollow tube 17, and the other end of the intermediate plate 19 is engaged with one of the latches via a pin 23 ′ inserted through the hollow tube 17. It is joined to the back surface of the tool 3 so as to be rotatable.
Therefore, the one locking tool 3, the middle plate 19, and the outer frame 18 can be folded in a three-fold shape with the one locking tool 3 as the frontmost surface. Note that when the one locking tool 3, the middle plate 19 and the outer frame 18 are folded, the engaging projection 22 of the outer frame 18 faces the opening 16 formed on the back surface of the one locking tool 3. ing.
[0022]
The safety cover 5 has left and right side walls 24 whose base ends are attached to the outside of the mounting pin support legs 20 of the outer frame 18, and a bridge portion 25 that is installed between the tips of the side walls 24.
And the attachment pin 30 used as a band mounting part is penetrated by the front-end | tip of the side wall 24, and the attachment pin support leg 20, and the safety cover 5 is attached to the outer frame 18 so that rotation is possible. A coil spring 31 is attached to both ends of the mounting pin 30, one end of which is fixed to the mounting pin support leg 20 and the other end is fixed to the side wall 24, and the safety cover 5 is moved away from the outer frame 18 by the coil spring 31. Is being energized.
[0023]
As shown in FIG. 2, a recess 29 is formed in the lower portion of the side wall 24. The concave portion 29 is adapted to be fitted to the first push button 12 when the bridge portion 25 of the safety cover 5 is fitted to the groove 10 of one of the locking tools 3. When the concave portion 29 is fitted to the first push button 12, the first push button 12 cannot be moved into the convex portion 6 by the belly of the finger due to the thickness of the side wall 24.
[0024]
Further, as shown in FIG. 4, an engagement protrusion 22 a having a large tip is formed on the back surface of the top portion of the bridge portion 25. The engaging protrusion 22a constitutes a second engaging means together with another pair of locking pieces 11a and 11a built in one locking tool 3. In addition, when the safety cover 5 is put on the surface of the one locking tool 3, the engaging protrusion 22 a faces the opening 16 a formed on the surface of the one locking tool 3.
[0025]
The band middle 1 is used as follows.
One end of the band 2 is inserted into the band insertion recess 7 of one of the locking tools 3, and an attachment pin (not shown) is inserted into one end of the band 2 and the through hole 9. It can be pivotally attached to.
Further, the other end of the band 2 is inserted between the attachment pin support legs 20 of the outer frame 18 and attached by the attachment pins 30.
[0026]
As shown in FIGS. 1 and 2, when the band retainer 1 is locked, the other locking tool 4 is folded and the middle plate 19 is fitted into the notch groove 21 of the outer frame 18 and folded. The other fastener 4 is overlapped on the back surface of the one fastener 3 and the fastener 1 is folded in three. In the state of being folded in three, the mounting pin support leg 20 of the outer frame 18, the base end inner side portion of the side wall 24, and the mounting pin 30 are fitted into the pin fitting recess 8 of one of the locking tools 3.
[0027]
Then, when one locking tool 3 is pressed to the back side, the engagement protrusion 22 of the outer frame 18 is inserted into the opening 16 as shown in FIG. The joint portion 13 is pushed apart and enters below. When the largest diameter portion of the engaging protrusion 22 passes through the most protruding portion of the engaging portion 13, the locking pieces 11, 11 return to the original position by the elastic force of the coil spring 15, and the tip of the engaging protrusion 22. The portion engages with the stepped portion 14. As a result, one locking tool 3 and the other locking tool 4 are engaged via the first engaging means constituted by the engaging protrusion 22 and the locking pieces 11, 11.
[0028]
Next, the safety cover 5 is folded over the surface of one of the locking tools 3, and the bridge portion 25 is fitted into the groove 10 of the one locking tool 3. Further, when the safety cover 5 is pressed to the back surface side, the engaging protrusion 22a is inserted into the opening 16a and is constituted by the engaging protrusion 22a and the locking pieces 11a and 11a, like the first engaging means. The second engaging means is engaged, and one locking tool 3 and the safety cover 5 are locked.
Further, in this state, since the recess 29 is fitted so as to surround the first push button 12, even if the side surface of the stopper 1 hits an object, the first push button 12 is protruded. Therefore, there is no fear that the engagement between the one locking tool 3 and the other locking tool 4 is disengaged.
[0029]
The middle ring 1 of the band can be removed as follows.
First, when the second push button 12a is pushed with a finger and moved toward the inside of the convex portion 6, the engaging portions 13a and 13a of the locking pieces 11a and 11a move away. Then, the engagement protrusion 22 a becomes free, the second engagement means is released, and the safety cover 5 is flipped up by the spring 31 attached to the attachment pin 30. When the safety cover 5 is opened, the first push button 12 fitted in the recess 29 is exposed.
Next, the first push button 12 is pressed to release the first engaging means in the same manner as the second engaging means, and one locking tool 3 is caused to move from the other locking tool 4.
[0030]
In addition, the middle ring of the band of the present invention may not be a three-fold type, but may be of a type in which one locking tool and the other locking tool are separated.
Moreover, the band latched by the middle ring of the present invention is not limited to a wristwatch, and can be used for an accessory such as a bracelet.
[0031]
【The invention's effect】
According to the structure of Claim 1, since one latching tool, the other latching tool, and the safety cover and one latching tool are each engaged reliably each other, safety is high.
In addition, when the safety cover is superposed on the surface of one of the locking devices, the first push button does not move in the direction of releasing the engagement, so that the middle stopper may hit an object during use. But you don't have to worry about unintentionally coming off the strap and dropping the band. Further, by pressing the first push button and the second push button, the engagement of one locking tool, the other locking tool, the safety cover, and the one locking member can be easily performed with one touch. It is possible to cancel.
[0032]
According to the second aspect of the present invention, when the second push button is pushed to release the second engagement means, the safety cover is automatically flipped up and the restriction of the first push button is released. The Nakadome can be easily removed.
[0033]
According to the structure of Claim 3, since the end part of a band is connected even if it removes a middle ring, the accident of a band fall can be prevented.
[0034]
According to the configuration of the fourth aspect, the first and second engaging means can be easily engaged by simply pressing the safety cover, the one locking tool, and the other locking tool in a stacked manner.
[0035]
According to the structure of claim 6, in the state where the middle ring is locked, the surface is not formed with irregularities, and the appearance is clean and thinned. Easy to use.
[Brief description of the drawings]
FIG. 1 is a plan view of an embodiment of the present invention when the band is locked. FIG. 2 is a side view of the band. FIG. 3 is a surface view of the band that is disengaged. [FIG. 5] Front view of the first and second engaging means. [FIG. 6] Side view of the main part of the same. [FIG. 7] End view of one locking tool. [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Band middle 2 Band 3 One locking tool 4 The other locking tool 5 Safety cover 6 Convex part 7 Band fitting recessed part 8 Pin fitting recessed part 9 Through-hole (band mounting part)
DESCRIPTION OF SYMBOLS 10 Groove | channel 11, 11a Locking piece 12 1st push button 12a 2nd push button 13, 13a Engagement part 14, 14a Step part 15 Coil spring 16, 16a Opening part 17 Hollow tube 18 Outer frame 19 Middle plate 20 Pin Support leg 21 Notch groove 22, 22a Engagement protrusion 23, 23 'Pin 24 Side wall 25 Bridge part 26 Engagement step part 27 Recess part 28 Stopper screw 29 Recess 30 Attachment pin (band attachment part)
31 Coil spring

Claims

One locking tool having a band mounting part, the other locking tool having a band mounting part, and the other locking tool are rotatably attached to the one locking tool. A safety cover that can be superposed on the surface of the one locking member when locked by the locking member, and a first engagement that is provided on the one locking member and the other locking member and engages them. A first push button provided on the one locking tool that releases the engagement of the first engaging means by a pressing operation, and the one locking tool and the other locking tool. A second engaging means for engaging the one locking tool and the safety cover in a state where the safety cover is superposed on the surface of the one locking tool; A second push button provided on the one locking member for releasing the engagement of the coupling means; Wherein the safety deposit cover, when the polymerized on the surface of one of the locking tool, clasp band first pushbutton is characterized by having a recess to be fitted.

The band retainer according to claim 1, wherein the safety cover is urged in a direction away from the surface of the one locking tool locked to the other locking tool.

3. The other locking device according to claim 1 or 2, wherein the opposite end of the band mounting portion is pivotally attached to the back surface of the one locking device and is foldable at an intermediate portion. Nakadome of the band.

The first and second engaging means are disposed so as to be close to and away from each other inside the one locking member, and a pair of locking pieces biased in the approaching direction, and the other locking member And an engaging protrusion that is provided on each of the safety covers and is inserted / removed between the pair of locking pieces and engaged with the pair of locking pieces in an approaching state. Nakadome of the band described in any of 1 to 3.

The engagement protrusion of the first engagement means is provided on the surface of the other engagement tool, and an opening into which the engagement protrusion of the first engagement means is inserted is provided on the one engagement tool. The second engagement means is formed on the back surface so as to face between the pair of locking pieces of the first engagement means, and the engagement protrusion of the second engagement means is provided on the back surface of the safety cover. The opening into which the engaging protrusion of the means is inserted is formed on the surface of the one engaging tool so as to face between the pair of engaging pieces of the second engaging means. Nakadome of the band described in 4.

The band intermediate ring according to any one of claims 1 to 5, wherein a groove for fitting the safety cover is formed on a surface of the one locking member.