EP0682300B1 - Système de liaison d'un bracelet à une boíte de montre - Google Patents

Système de liaison d'un bracelet à une boíte de montre Download PDF

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Publication number
EP0682300B1
EP0682300B1 EP95107043A EP95107043A EP0682300B1 EP 0682300 B1 EP0682300 B1 EP 0682300B1 EP 95107043 A EP95107043 A EP 95107043A EP 95107043 A EP95107043 A EP 95107043A EP 0682300 B1 EP0682300 B1 EP 0682300B1
Authority
EP
European Patent Office
Prior art keywords
band
push button
slit
watch case
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95107043A
Other languages
German (de)
English (en)
Other versions
EP0682300A1 (fr
Inventor
Junichi Nishikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Publication of EP0682300A1 publication Critical patent/EP0682300A1/fr
Application granted granted Critical
Publication of EP0682300B1 publication Critical patent/EP0682300B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/14—Suspending devices, supports or stands for time-pieces insofar as they form part of the case
    • G04B37/1486—Arrangements for fixing to a bracelet
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
    • A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
    • A44C5/14—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps characterised by the way of fastening to a wrist-watch or the like

Definitions

  • the present invention relates to a structure for connecting a band to a watch case, and more particularly to a connecting structure where the band is readily releasable from the watch case for changing the band with another band.
  • Swiss Patent 664663 discloses such a connecting structure of a watch band.
  • a watch case has a pair of legs on the opposite peripheral sides thereof, respectively. Each leg has a through hole having a slit opening.
  • the band has an engaging link at the end thereof.
  • a pair of push buttons, each having a shaft is slidably mounted in a lateral hole of the engaging link, urged outward by a spring provided in the hole.
  • the shaft of the push button has a large diameter portion at the inner side and a small diameter portion at the outer side of the large diameter portion.
  • the slit openings of the through holes formed in the legs has a width smaller than the diameter of the large diameter portion but larger than that of the small diameter portion.
  • each push button projects out of the end link by the urging of the spring.
  • the large diameter portion of the shaft engages with the through hole of the legs, unable to slip out through the opening.
  • the watch case and the band are securely engaged.
  • the large diameter portion of the push button must be able to slide in the through hole of the engaging link and the leg, the thicknesses thereof inevitably increase.
  • the opening formed in the legs also renders the thickness of the leg to be increased to maintain the rigidity of the leg.
  • the band becomes expensive. If the user wishes to own various bands which can be attached to the watch case, he must incur a large cost.
  • Japanese Patent Application Laid-Open 1-99504 discloses a watch in which a watch band can be removed from a buckle for displaying the watch in a showcase.
  • a cover of the buckle has a plurality of holes on each longitudinal side thereof, each hole having a slit opened to the lower edge of the cover.
  • a pin having at each end, a rectangular engaging projections inclined in one direction with respect to the longitudinal direction of the band.
  • the rotation of the projection is prevented only by the tension of the band which is generated when worn. Hence the projections may easily disengage from the hole, thereby causing the watch to fall off during use.
  • An object of the present invention is to provide an inexpensive but reliable structure for easily connecting a band to a watch case without deteriorating the appearance of the watch, so that the band can be readily exchanged without using any special skills or tools.
  • a structure for connecting a band to a watch case the band having a pair of lateral projections at both ends thereof, the watch case having a pair of supporting projections formed on each opposite side of the case, each of the projections having a pair of lateral holes,characterized in that at least one of the supporting projections has a slit formed at a bottom thereof, cam means having an opening is rotatably mounted in the hole, a push button is slidably mounted in the hole, and operatively engaged with the cam means so as to rotate the cam means to confront the opening of the cam means with the slit of the supporting projection when the push button is depressed, whereby the lateral projections of the band can be removed from the slit.
  • a watch 1 of the present invention comprises a watch case 2 having a back 8 and a pair of bands 3 detachably attached on the opposite peripheral sides of the case 2.
  • the case 2 has a pair of lugs 4 at the opposite sides for attaching the bands 3.
  • Each lug 4 has a pair of supporting projections 4a on the underside thereof and a recess 5 between the projections 4a.
  • An end link 15 of the band 3 can be inserted in the recess 5.
  • a pair of through holes 6 are formed in each projection 4a in the lateral direction of the band 3 and extending from the side surfaces of the projection 4a to the recess 5 as shown in Figs. 2 and 3.
  • the diameter of each through hole 6 at the inner end thereof is small, whereas the diameter at the outer end is large, forming a large diameter portion 14.
  • An annular seat 16 is formed at the inner end of the large diameter portion 14.
  • the back of the projection 4a is further cut out to form a pair of slits 7, each of which communicating with the recess 5 and the hole 6.
  • the slit 7 is inclined toward the center of the case 2 as shown in Fig. 11.
  • a push button 9 to be inserted in each hole 6 of the projection 4a comprises a head 11 adapted to project out of the projection 4a, and a shaft 12 integral with the head 11. As shown in Figs. 4 and 5, an annular groove 18 is formed in the head 11, thereby forming a peripheral wall 17.
  • the shaft 12 has an end portion 19, the periphery of which is parallely cut to form a pair of opposite side faces 19a.
  • a hole 20 is further formed in the end portion 19 of the shaft 12 wherein a guide pin 21 is to be inserted as will be later described.
  • the push button 9 is inserted in a cylindrical member 13 and a cam tube 10.
  • the cylindrical member 13 having a slightly smaller diameter than the large diameter portion 14 of the hole is adapted to fit therein so that a bottom 22 of the cylindrical member 13 may rest on the seat 16.
  • the cylindrical member 13 has an oblong hole 23 formed in a shape corresponding to the section of the end portion 19 of the push button 9, the area of which being slightly larger than the sectional area of the end portion 19, hence permitting the insertion thereof. In this manner, the shaft 12 and hence the push button 9 is prevented from rotating in the cylindrical member.
  • the end portion 19 of the shaft 12 which projects out of the cylindrical member 13 extrudes into the cam tube 10. As shown in Fig.
  • a coil spring 24 is provided in the groove 18 between the head 11 of the push button 9 and the bottom 22 of the cylindrical member 13, surrounding the shaft 12. Since a part of the coil spring 24 is disposed in the annular groove 18 inside the head 1, the length of the push button 9 can be reduced, and as a result, the width of the end link 15 and the lug 4 can be reduced.
  • the cam tube 10 having a diameter slightly smaller than the inner diameter of the hole 6, has an oblong cam groove 25 formed on the periphery thereof.
  • the groove 25 is extends roughly in the axial direction of the cam tube 10, but also inclined that an outer end a and an inner end b thereof are 45 degrees apart from each other with respect to the circumference of the cam tube as shown in Fig. 10.
  • An end portion of the guide pin 21 is slidably engaged with the cam groove 25 while the other end thereof is engaged in the hole 20 of the end portion 19 of the push button 9, thereby operatively connecting the push button 9 and the cam tube 10. Namely, when the shaft 12 slides inward into the cam tube 10, the guide pin 21 slides along the cam groove 25 from the outer end a to the inner end b, thereby rotating the cam tube 10 45 degrees.
  • a half of the circumferential periphery of the cam tube 10 is cut away at the inner end portion thereof, forming an opening 26.
  • a semicircular groove 26a is formed in the end wall of the cam tube 10. The opening 26 and the groove 26a are so designed that the circumferential center thereof confronts the inner end b of the groove 25.
  • the thus assembled push button 9, cylindrical member 13 and the cam tube 10 are inserted in each hole 6 of the lug 4.
  • the push button 9 is so disposed as to project the head 11 out of the cylindrical member 13 as shown in Fig. 2, and the cam tube 10 is so positioned as to close the slit 7 by the periphery thereof as shown in Fig. 12.
  • the cam tube 10 is rotatably mounted therein.
  • the cam tube 10 is held between the cylindrical member 13 and an inner wall 16a of the projection 4a, so as to be prevented from moving in the lateral direction of the band. Since the end portion 19 of the shaft 12 engages with the oblong hole 23 of the cylindrical member 13, the push button 9 is prevented from rotating.
  • the end link 15 of the band 3 is provided with a lateral pin 27 for connecting the band 3 to the projection 4a.
  • the pin 27 has a small diameter portion 28 at the middle on which a packing 29 is mounted.
  • the pin 27 further has projections 30 at opposite ends thereof.
  • the projection 30 is adapted to be inserted in the slit 6 formed in the projection 4a.
  • each push button 9 on either side of the projection 4a is depressed at the head 11.
  • the guide pin 21 on the end portion 19 thereof engaged with the cam groove 25 slides along the groove 25 from the outer end a toward the inner end b in Fig. 8, causing the cam tube 10 to rotate 45 degrees in a direction c in Fig. 13.
  • opening 26 of the cam tube 10 coincides with the slit 7 so as to form a gap in the underside of the projection 4a.
  • Each projection 30 of the band 3 is inserted into the hole 6 and the groove 26a of the cam tube 10 passing through the slit 7 and the opening 26 as shown in Fig. 2.
  • each slit 7 is designed to incline toward the watch case 2 as the slit extend downward to prevent the band 3 from releasing. More particularly, the band is tensed by the compressed wrist of the wearer in a horizontal direction opposite to the inclination of the slit 7, the pin 27 is urged to the right in Fig. 13. Thus, the pin 27 does not slip out through the slit 7.
  • a push button locking mechanism as a more reliable means is provided for preventing the above described accidents is provided in the second embodiment shown in Fig. 14.
  • a cylindrical member 13a is secured to the outside of the case 2 and a screw thread 13b is formed on the periphery of the cylindrical member.
  • a lock ring 31 having an inner screw thread 31a is screwed on the screw thread 13b of the cylindrical member 13a.
  • the pin 27 is not provided with the packing 29 of the first embodiment. Instead, the pin is fitted in the hole of the end link 15 by press fit, or by press fit adherence.
  • push buttons 9a are completely hidden inside a projection 4b of the watch case. Namely, each cylindrical member 13c is completely embedded in the projection 4b so that a head 11a of the push button 9a is inserted even during the band connecting state.
  • a watch has an improved appearance, and furthermore, there is no danger of the push button 9a being accidentally depressed.
  • the push buttons 9a cannot be reached with the fingers. Hence it is necessary to use a simple tool such as a ball pen to depress a head 11a of the push button 9a in order to exchange the band.
  • a lower portion of a projection 4c of the watch case is cut away at each end to expose a portion of a push button 9b.
  • the presently described embodiments all have push buttons at both sides of the lug, so that the pin of the watch band can be attached or released when both push buttons are intentionally depressed by the user. Hence there is little risk of the watch falling from wrist when worn.
  • the present invention may be modified to provide the push button only on one side of the lug.
  • one of the projections 30 of the pin 27 is inserted in the hole 6 formed at one of the sides of the lug without the push button.
  • the push button 9 on the other side is then depressed, thereby opening the slit 7 by the rotation of the cam tube 10 so that the other projection 30 of the pin 27 can be inserted.
  • the hole 6 which is not provided with the push button need not be a through hole and is sufficient as long as the depth thereof is large enough to hold the projection 30. Such a structure renders it possible to reduce the numbers of the manufacturing processes and the parts of the watch, thereby decreasing the manufacturing cost.
  • the present invention may be applied to a watch having a pair of legs, instead of the lug 4, disposed apart from each other a distance corresponding to the width of the watch band.
  • the present invention provides a structure for connecting a band to a watch case wherein the band can be easily attached and detached just by operating push buttons.
  • the band can be easily attached and detached just by operating push buttons.
  • the band need not be equipped with any special member except the projections at the end thereof, so that the construction of the band is simplified. Hence, there is no difference between the end link and the rest of the links comprising the band, improving the appearance of the watch. In addition, the manufacturing cost of the band can be reduced, so that the user is able to purchase various bands.
  • the push button comprises a large diameter portion and a small diameter portion which are inserted in the legs of the watch case
  • the thicknesses of the legs and the end link of the band can be decreased, thereby improving the appearance of the watch.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)

Claims (7)

  1. Structure pour fixer un bracelet (3) à un boítier de montre (2), le bracelet ayant une paire de saillies latérales (30) à ses deux extrémités, le boítier de montre ayant une paire de saillies de soutien (4a) formées sur chaque côté opposé du boítier, chacune des saillies ayant une paire de trous latéraux (6), caractérisée en ce que
    au moins une des saillies de soutien a une fente (7) formée à sa base,
    des moyens de came (10, 25) ayant une ouverture (26) sont montés en rotation dans le trou (6);
    un bouton-poussoir (9) est monté de manière coulissante dans le trou (6), et est fonctionnellement engagé avec les moyens de came afin de faire tourner les moyens de came pour mettre en présence l'ouverture (26) des moyens de came avec la fente (7) de la saillie de soutien lorsque le bouton-poussoir est enfoncé, en conséquence de quoi les saillies latérales du bracelet peuvent être retirées de la fente.
  2. Structure selon la revendication 1 dans laquelle la fente est inclinée vers le bas en direction d'un centre du boítier de montre.
  3. Structure selon la revendication 1 dans laquelle des moyens de fermeture (13a, 31) sont prévus pour verrouiller le bouton-poussoir.
  4. Structure selon la revendication 1 dans laquelle le bouton-poussoir est placé à l'intérieur de la saillie de soutien.
  5. Structure selon la revendication 1 dans laquelle les moyens de came comprennent un tube de came (10) ayant une rainure de came (25), et le bouton-poussoir (9) a une broche (21) engagée de manière coulissante dans la rainure de came.
  6. Structure selon la revendication 1 dans laquelle le bouton-poussoir a une tête (11) faisant saillie hors du trou, un axe (12) ayant un diamètre plus petit que la tête, et une rainure annulaire formée dans le côté intérieur de la tête, et un ressort (24) est prévu dans la rainure entourant l'axe pour forcer la tête et l'axe vers l'extérieur.
  7. Structure selon la revendication 3 dans laquelle les moyens de fermeture comprennent un élément cylindrique (13a) monté de manière fixe sur le boítier de montre (2), l'élément cylindrique ayant un filet de vis externe (13b) sur sa périphérie, et une bague de verrouillage (31) ayant un filet de vis interne (31a) est engagée avec le filet de vis externe de l'élément cylindrique aux filets de vis (13b, 31a).
EP95107043A 1994-05-12 1995-05-10 Système de liaison d'un bracelet à une boíte de montre Expired - Lifetime EP0682300B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12204194A JP3530578B2 (ja) 1994-05-12 1994-05-12 時計バンドの取り付け構造
JP122041/94 1994-05-12

Publications (2)

Publication Number Publication Date
EP0682300A1 EP0682300A1 (fr) 1995-11-15
EP0682300B1 true EP0682300B1 (fr) 1998-08-05

Family

ID=14826144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107043A Expired - Lifetime EP0682300B1 (fr) 1994-05-12 1995-05-10 Système de liaison d'un bracelet à une boíte de montre

Country Status (3)

Country Link
EP (1) EP0682300B1 (fr)
JP (1) JP3530578B2 (fr)
DE (1) DE69503833T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3883424B1 (fr) * 2018-11-22 2022-09-28 LVMH Swiss Manufactures SA Embout

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE436045T1 (de) * 2002-09-17 2009-07-15 Cartier Creation Studio Sa Vorrichtung zur fixierung eines armbandes auf einem uhrgehäuse
JP4754249B2 (ja) * 2005-03-30 2011-08-24 シチズンホールディングス株式会社 バンドの連結構造
CH706443A1 (fr) * 2012-04-27 2013-10-31 Piguet & Co Horlogerie Dispositif d'attache d'un bracelet interchangeable pour pièce d'horlogerie.
EP2672337B1 (fr) * 2012-06-06 2019-08-07 Glashütter Uhrenbetrieb GmbH Dispositif de fixation amovible et pivotant pour bracelet
JP6405624B2 (ja) * 2013-12-19 2018-10-17 カシオ計算機株式会社 ケース及び時計
CN104698810B (zh) * 2015-03-16 2017-03-01 惠州Tcl移动通信有限公司 一种易拆卸表带的手表
JP2017047156A (ja) * 2015-09-02 2017-03-09 渡辺　明 バンドのアジャスト機構
CN105361373B (zh) * 2015-12-03 2017-10-10 青岛歌尔声学科技有限公司 一种手表及其腕带的装配方法
WO2018058388A1 (fr) * 2016-09-28 2018-04-05 华为技术有限公司 Dispositif portatif et son corps principal
EP3473127B1 (fr) 2017-10-20 2021-10-06 Montres Breguet S.A. Dispositif de fixation d'un bracelet
CH715688A1 (fr) 2018-12-21 2020-06-30 Cartier Int Ag Fermoir à boucle déployante pour bracelet.
CN112205722A (zh) * 2019-07-09 2021-01-12 Oppo广东移动通信有限公司 可穿戴设备
CN112273807B (zh) * 2019-07-23 2022-01-18 Oppo广东移动通信有限公司 可穿戴设备
CN112716119B (zh) * 2020-12-29 2022-08-26 维沃移动通信有限公司 手表

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959859C (de) * 1952-04-09 1957-03-14 Robert Sparn Verschluss fuer Armbaender
FR2634360A1 (en) * 1988-07-22 1990-01-26 Sussex France Sa Means for fastening a watch bracelet to the case thereof
FR2694484B1 (fr) * 1992-08-10 1994-10-28 Sussex France Dispositif de fixation d'un corps plat allongé sur un élément et bracelet-montre comportant un tel dispositif.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3883424B1 (fr) * 2018-11-22 2022-09-28 LVMH Swiss Manufactures SA Embout

Also Published As

Publication number Publication date
DE69503833D1 (de) 1998-09-10
DE69503833T2 (de) 1998-12-10
JP3530578B2 (ja) 2004-05-24
EP0682300A1 (fr) 1995-11-15
JPH07303506A (ja) 1995-11-21

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