EP2672334A1 - Clock mechanism with gear backlash reduction - Google Patents

Clock mechanism with gear backlash reduction Download PDF

Info

Publication number
EP2672334A1
EP2672334A1 EP12004340.1A EP12004340A EP2672334A1 EP 2672334 A1 EP2672334 A1 EP 2672334A1 EP 12004340 A EP12004340 A EP 12004340A EP 2672334 A1 EP2672334 A1 EP 2672334A1
Authority
EP
European Patent Office
Prior art keywords
clock mechanism
mechanism according
mobile
axis
frame
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.)
Withdrawn
Application number
EP12004340.1A
Other languages
German (de)
French (fr)
Inventor
Sylvain Perret
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.)
Chopard Technologies SA
Original Assignee
Chopard Technologies SA
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 Chopard Technologies SA filed Critical Chopard Technologies SA
Priority to EP12004340.1A priority Critical patent/EP2672334A1/en
Publication of EP2672334A1 publication Critical patent/EP2672334A1/en
Withdrawn legal-status Critical Current

Links

Images

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
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears

Definitions

  • the present invention relates to a clock mechanism, typically a movement, comprising a device for reducing gear sets.
  • the present invention aims to remedy this drawback, or at least to mitigate it, and proposes for this purpose a clock mechanism comprising a frame, first and second axes mounted in the frame and first and second mobiles mounted around the first and second second axes respectively and forming together a permanent gear, characterized in that it comprises a device for adjusting the distance between said axes to reduce the play of the gear.
  • the reduction of the set of gearing is thus obtained not by braking one of the mobiles but by an adjustment tending to bring the moving parts closer to each other (with respect to their nominal position). to increase the depth of penetration of the teeth.
  • the space between two consecutive teeth is better filled and the game is reduced.
  • Adjustment elements such as eccentrics are already used in chronograph mechanisms to adjust the depth of penetration of the gear of the clutch wheel into the toothing of the chronograph wheel.
  • this adjustment is not intended to reduce gearing.
  • the clutch wheel forms with the chronograph wheel a non-permanent gear, in which the wheels can be, and often are, out of contact with each other.
  • said device comprises an adjustable member supporting the first axis.
  • the second mobile can be arranged to drive the first mobile.
  • the first mobile can be a led mobile and the second mobile a mobile leading.
  • the first mobile is the last mobile of a gear train which also includes the second mobile, and the first axis carries an indicator needle such as an indirect second indicator pointer.
  • the first axis can be supported on one side of the first mobile by a fixed bearing defined by the frame and the other side of the first mobile by the adjustable member.
  • the adjustable member is in the form of a rocker comprising an annular portion surrounding the first axis.
  • the annular portion may surround a stone which itself surrounds the first axis.
  • the adjustable member may further include a frame attachment portion and a flexible elongated portion connecting the attachment portion to the annular portion.
  • the adjustable member may further comprise a rigid elongated portion extending substantially in the extension of the flexible elongated portion from the annular portion to a free end.
  • said device further comprises an adjusting member of the adjustable member, this adjustment element being operable by means of a tool.
  • the adjustment element typically cooperates with said free end of the adjustable member.
  • the adjustment element is for example an eccentric.
  • the watch mechanism according to the invention consists of a watch movement and the adjustment element is accessible from the outside of the movement after complete assembly of said movement.
  • mobile means any rotary member such as wheel, pinion, return or rake.
  • a gear comprising a driven wheel 2 meshing with a driving wheel 3 is mounted in the frame 1.
  • the gear 2, 3 is mounted in a shunt from a work train connecting a drive member (barrel), shown schematically by the letter B, to an exhaust, shown schematically by the letter E. Only a wheel 4 of the work train is shown in the drawing. It is typically a second wheel, constituting the last wheel of the finishing train, located for example at 6 o'clock.
  • the driving wheel 3 meshes with this wheel 4 and constitutes a return between this wheel 4 and the driven wheel 2.
  • the driven wheel 2 is another second wheel, called “second indirect", located in the center of the movement.
  • the wheels 2, 3 are fixed, for example by riveting or driving, about respective axes 5, 6 substantially parallel and rotating in bearings. Each wheel 2, 3 may alternatively be monoblock with its axis 5, 6.
  • the axis 5 of the driven wheel 2 carries a second hand 7.
  • this device is arranged to render adjustable the distance between the axes 5, 6 and more particularly comprises an adjustable member in the form of a rocker 8.
  • An annular portion 9 of the rocker 8 defines a bearing for the axis 5 of the driven wheel 2. More specifically, a pierced stone 10 is fixed (eg driven) in the hole of the annular portion 9 and serves as a bearing for the axis 5.
  • the axis 5 passes through the stone 10 and the dial (not shown) of the movement and carries at its end the needle 7.
  • the axis 5 terminates in a pivot 11 which rotates in a pierced stone 12 fixed in a bearing 13 defined by a bridge or plate of the frame 1.
  • the axis 5 has bearing surfaces 14, 15 can bear against the stones 10, 12 to maintain the axis 5 in axial position.
  • the axis 6 of the driving wheel 3 is itself mounted in a conventional manner between bearings defined by the frame 1.
  • the latch 8 comprises a fastening portion 16 fixed to the frame 1, a flexible elongate portion (elastic) 17 connecting the annular portion 9 to the attachment portion 16, and a rigid elongate portion 18 located in the extension of the flexible elongate portion 17 but on the other side of the annular portion 9.
  • the rocker 8 is typically a single piece made for example of steel or nickel, according to the LIGA method.
  • the rigid elongated portion 18 terminates in a free end 19 in the shape of a key or fork which receives the head of an eccentric 20 whose stem, eccentric relative to the head, is driven into the frame 1.
  • the eccentric 20 constitutes a setting member for adjusting the position of the rocker 8.
  • a rotation of the eccentric 20 printed by means of a tool such as a screwdriver moves the parts 9, 18, 19 of the rocker 8 in a sector annular causing a deflection of the flexible elongated portion 17.
  • the displacement of the annular portion 9 is small so that it can be approximated in a linear movement directed towards the center of the driving wheel 3.
  • the rectilinear rigid portion 18 facilitates the driving of the annular portion 9 by the eccentric 20 and allows a very fine displacement of the annular portion 9.
  • This displacement of the part 9 causes a displacement of the axis 5 of the driven wheel 2 which decreases or increases the distance between the axes 5, 6 according to the direction of rotation of the eccentric 20.
  • the distance value chosen is that which minimizes the play of the gear 2, 3 while avoiding a blockage of this gear.
  • it will be chosen as a profile of the teeth of the wheels 2, 3 a profile supporting relatively large spacing variations.
  • This adjustment of the distance between the axes 5, 6 can be done during the assembly of the movement, more precisely at the end of this assembly, and is specific to each movement.
  • the rocker 8 remains fixed and the wheels 2, 3 meshes permanently with each other according to the depth of penetration of the teeth previously set with the device 8, 20.
  • a flat 21 formed on the head The eccentric 20 can be used to limit the travel of the latch 8 and / or to index the eccentric 20 during assembly.
  • the reduction of the gear sets is obtained without braking the driven wheel 2 and therefore without energy losses.
  • the only friction to which the axis 5 is subjected are those resulting from the contact between this axis 5 and the stones 10, 12.
  • the stones 10, 12, made for example of ruby have a very good coefficient of friction with the axis 5, made for example of steel.
  • Tests carried out on movements equipped with the device 8, 20 have shown that the gear sets could be reduced or eliminated without causing a variation in the amplitude of the balance or a change in gait.
  • the wall of the hole of the stone 12 and / or the bearing surface of the stone 12 cooperating with the surface 15 may be curved in order to reduce friction.
  • the bearing 13 secured to the rigid portion 9, 18, 19 of the rocker 8 so that the displacement of this rigid portion (by deformation of the flexible portion 17) moves the axis 5 while maintaining its perpendicularity.
  • the latch 8 can be mounted in the frame 1 by means of pins 22 linking the attachment portion 16 to a bridge 1a of the frame 1.
  • the latch 8 can be embedded in the bridge 1a, as shown in FIG. figure 2 , or simply above or below deck 1 a.
  • Other modes of fixing the flip-flop 8 to the bridge 1a could be envisaged.
  • the attachment portion 16 could have a shape that allows it to be inserted into a slot of the bridge 1a and to be attached by driving, welding, gluing, crimping or otherwise.
  • the Figures 4, 5 and 6 are examples of such a method of attachment.
  • the free end 19 of the rocker 8 cooperating with the eccentric 20 could have a shape other than that shown in FIGS. figures 1 and 2 , for example an annular shape surrounding the head of the eccentric ( figure 7 ) or a finger shape that fits just around the edge of the eccentric's head ( figure 8 ).
  • rotating the eccentric 20 in one direction or the other may bend the flexible elongate portion 17 in one direction or the other.
  • the rotation of the eccentric 20 could be done by angularly defined steps.
  • notches could be provided on the around the head of the eccentric 20, which would cooperate with a jumper spring or with notches provided on the free end 19 of the rocker 8.
  • an adjusting element 23 in the form of a screw extending parallel to the plane of the movement and the end of which is in contact with one of the two sides of the rigid elongate portion 18 near the free end of the rocker .
  • the eccentric 20 as shown in Figures 1 to 3
  • the head of the eccentric 20 is accessible to a tool through an opening 24 formed in a bridge of the frame.
  • the figure 10 shows the movement of the bridge side, which is the side corresponding to the bottom of the watch case in which the movement is intended to be incorporated.
  • a setting element such as the eccentric 20 or the screw 23 could be made so that the free end of the rocker 8 is held by friction against a wall of the frame 1 or between notches of this wall .
  • the flip-flop could then be moved simply by pushing it by means of a tool.
  • rocker 8 could be entirely rigid and articulated around a pivot mounted in the frame.
  • the present invention finds other applications than the indication of an indirect second in the center.
  • the wheel 2 could be a second wheel in the center constituting the last wheel of the work train and the axis of the wheel 4, located in derivation relative to the work train, could carry an indirect second needle off-center.
  • the rocker 8 would be associated with the wheel 4, rather than the wheel 2.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

The mechanism has axles (5, 6) mounted in a frame, and mobile units formed of a driven wheel (2) and a driving wheel (3) mounted around the axles, respectively, where the mobile units form permanent gears. An adjustment unit formed of a rocker (8) and an eccentric (20) adjusts a distance between the axles to decrease clearance of the gears. The rocker supports one of the axles. The former axle carries seconds hand (7). The former axle is supported on a side of one of the mobile units by a fixed bearing defined by the frame and on another side of the former mobile unit by the rocker.

Description

La présente invention concerne un mécanisme horloger, typiquement un mouvement, comportant un dispositif de réduction des jeux d'engrenage.The present invention relates to a clock mechanism, typically a movement, comprising a device for reducing gear sets.

Dans un mouvement d'horlogerie mécanique, les mobiles du rouage de finissage qui relie l'organe moteur (barillet) à l'échappement sont en permanence soumis à la tension qu'exerce l'organe moteur et ne subissent donc pas les jeux d'engrenage. En revanche, lorsqu'une roue est montée en dérivation depuis un mobile du rouage de finissage pour, par exemple, porter une aiguille de seconde au centre indirecte, cette roue située en fin d'un train d'engrenages subit les jeux d'engrenage et peut alors tourner de manière saccadée et irrégulière, ce qui fait chevroter l'aiguille et nuit donc à la précision d'affichage. De tels jeux ou ébats d'engrenage sont dus aux tolérances de fabrication. Pour remédier à ce problème, il est connu de freiner la dernière roue du train d'engrenages au moyen d'une force de friction exercée par un ressort ou d'une force magnétique, comme décrit par exemple dans les documents CH 679.823 , CH 506.824 , US 3.609.961 et EP 0.217.251 . Un inconvénient de tels dispositifs est qu'ils occasionnent des pertes énergétiques importantes pouvant notamment perturber l'amplitude du balancier et la marche de la montre.In a mechanical watchmaking movement, the mobiles of the work train that connects the drive member (barrel) to the exhaust are permanently subjected to the tension exerted by the drive member and therefore do not undergo the games of gear. On the other hand, when a wheel is mounted in shunt from a mobile of the work train to, for example, carry a second hand to the indirect center, this wheel located at the end of a gear train undergoes the gear sets and can then rotate jerkily and irregularly, which causes the needle to bounce and thus adversely affects display accuracy. Such games or gearing are due to manufacturing tolerances. To remedy this problem, it is known to brake the last wheel of the gear train by means of a friction force exerted by a spring or a magnetic force, as described for example in the documents CH 679.823 , CH 506.824 , US 3,609,961 and EP 0.217.251 . A disadvantage of such devices is that they cause significant energy losses that can notably disturb the amplitude of the balance and the running of the watch.

La présente invention vise à remédier à cet inconvénient, ou au moins à l'atténuer, et propose à cette fin un mécanisme horloger comprenant un bâti, des premier et deuxième axes montés dans le bâti et des premier et deuxième mobiles montés autour des premier et deuxième axes respectivement et formant ensemble un engrenage permanent, caractérisé en ce qu'il comprend un dispositif permettant de régler la distance entre lesdits axes pour diminuer le jeu de l'engrenage.The present invention aims to remedy this drawback, or at least to mitigate it, and proposes for this purpose a clock mechanism comprising a frame, first and second axes mounted in the frame and first and second mobiles mounted around the first and second second axes respectively and forming together a permanent gear, characterized in that it comprises a device for adjusting the distance between said axes to reduce the play of the gear.

Dans la présente invention, la réduction du jeu d'engrenage est ainsi obtenue non pas en freinant l'un des mobiles mais par un réglage tendant à rapprocher les mobiles l'un de l'autre (par rapport à leur position nominale) de manière à augmenter la profondeur de pénétration des dentures. En augmentant la profondeur de pénétration des dentures, l'espace entre deux dents consécutives est mieux rempli et le jeu est donc réduit.In the present invention, the reduction of the set of gearing is thus obtained not by braking one of the mobiles but by an adjustment tending to bring the moving parts closer to each other (with respect to their nominal position). to increase the depth of penetration of the teeth. By increasing the depth of penetration of the teeth, the space between two consecutive teeth is better filled and the game is reduced.

Des éléments de réglage tels que des excentriques sont déjà utilisés dans des mécanismes de chronographe pour régler la profondeur de pénétration de la denture de la roue d'embrayage dans la denture de la roue de chronographe. Toutefois, ce réglage n'a pas pour but de diminuer les jeux d'engrenage. De plus, dans ce type de mécanisme, la roue d'embrayage forme avec la roue de chronographe un engrenage non permanent, dans lequel les roues peuvent être, et sont même le plus souvent, hors de contact l'une de l'autre. A la connaissance de la demanderesse, il n'avait, avant la présente invention, jamais été proposé de dispositif permettant de régler l'entraxe d'un engrenage permanent pour diminuer le jeu de ce dernier. Cette solution est particulièrement avantageuse en ce qu'elle résout le problème de pertes énergétiques que connaissent les mécanismes à frein de la technique antérieure.Adjustment elements such as eccentrics are already used in chronograph mechanisms to adjust the depth of penetration of the gear of the clutch wheel into the toothing of the chronograph wheel. However, this adjustment is not intended to reduce gearing. In addition, in this type of mechanism, the clutch wheel forms with the chronograph wheel a non-permanent gear, in which the wheels can be, and often are, out of contact with each other. To the knowledge of the applicant, it had not, before the present invention, ever been proposed device for adjusting the spacing of a permanent gear to reduce the play of the latter. This solution is particularly advantageous in that it solves the problem of energy losses experienced by brake mechanisms of the prior art.

Selon un mode de réalisation préféré de la présente invention, ledit dispositif comprend un organe réglable supportant le premier axe.According to a preferred embodiment of the present invention, said device comprises an adjustable member supporting the first axis.

Le deuxième mobile peut être agencé pour entraîner le premier mobile. En d'autres termes, le premier mobile peut être un mobile mené et le deuxième mobile un mobile menant.The second mobile can be arranged to drive the first mobile. In other words, the first mobile can be a led mobile and the second mobile a mobile leading.

Dans une application avantageuse, le premier mobile est le dernier mobile d'un train d'engrenages dont fait également partie le deuxième mobile, et le premier axe porte une aiguille indicatrice telle qu'une aiguille indicatrice de seconde indirecte.In an advantageous application, the first mobile is the last mobile of a gear train which also includes the second mobile, and the first axis carries an indicator needle such as an indirect second indicator pointer.

Le premier axe peut être supporté d'un côté du premier mobile par un palier fixe défini par le bâti et de l'autre côté du premier mobile par l'organe réglable.The first axis can be supported on one side of the first mobile by a fixed bearing defined by the frame and the other side of the first mobile by the adjustable member.

De préférence, l'organe réglable est sous la forme d'une bascule comprenant une partie annulaire entourant le premier axe.Preferably, the adjustable member is in the form of a rocker comprising an annular portion surrounding the first axis.

Dans ce cas, la partie annulaire peut entourer une pierre qui elle-même entoure le premier axe.In this case, the annular portion may surround a stone which itself surrounds the first axis.

L'organe réglable peut comprendre en outre une partie d'attache au bâti et une partie longiligne flexible reliant la partie d'attache à la partie annulaire.The adjustable member may further include a frame attachment portion and a flexible elongated portion connecting the attachment portion to the annular portion.

L'organe réglable peut comprendre en outre une partie longiligne rigide s'étendant sensiblement dans le prolongement de la partie longiligne flexible depuis la partie annulaire jusqu'à une extrémité libre.The adjustable member may further comprise a rigid elongated portion extending substantially in the extension of the flexible elongated portion from the annular portion to a free end.

De préférence, ledit dispositif comprend en outre un élément de réglage de l'organe réglable, cet élément de réglage étant actionnable par l'intermédiaire d'un outil.Preferably, said device further comprises an adjusting member of the adjustable member, this adjustment element being operable by means of a tool.

L'élément de réglage coopère typiquement avec ladite extrémité libre de l'organe réglable.The adjustment element typically cooperates with said free end of the adjustable member.

L'élément de réglage est par exemple un excentrique.The adjustment element is for example an eccentric.

Dans un exemple de réalisation, le mécanisme horloger selon l'invention consiste en un mouvement horloger et l'élément de réglage est accessible depuis l'extérieur du mouvement après assemblage complet dudit mouvement.In an exemplary embodiment, the watch mechanism according to the invention consists of a watch movement and the adjustment element is accessible from the outside of the movement after complete assembly of said movement.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue en plan d'un mécanisme selon un mode de réalisation préféré de l'invention ;
  • la figure 2 est une vue en plan d'un organe réglable et d'un élément de réglage faisant partie du mécanisme illustré à la figure 1 ;
  • la figure 3 est une vue en coupe dudit mécanisme dans un plan perpendiculaire au plan de la figure 1 ;
  • les figures 4 à 6 sont des vues en plan partielles montrant des variantes de réalisation d'une partie d'attache de l'organe réglable ;
  • les figures 7 à 9 sont des vues en plan partielles montrant des variantes de réalisation d'une partie d'extrémité libre de l'organe réglable et d'un élément de réglage de l'organe réglable coopérant avec cette partie d'extrémité libre ;
  • la figure 10 est une vue en plan du côté ponts d'un mouvement horloger constituant un mécanisme selon l'invention.
Other features and advantages of the present invention will appear on reading the following detailed description given with reference to the accompanying drawings in which:
  • the figure 1 is a plan view of a mechanism according to a preferred embodiment of the invention;
  • the figure 2 is a plan view of an adjustable member and an adjusting member forming part of the mechanism illustrated in FIG. figure 1 ;
  • the figure 3 is a sectional view of said mechanism in a plane perpendicular to the plane of the figure 1 ;
  • the Figures 4 to 6 are partial plan views showing alternative embodiments of an attachment portion of the adjustable member;
  • the Figures 7 to 9 are partial plan views showing alternative embodiments of a free end portion of the adjustable member and a adjusting member of the adjustable member cooperating with this free end portion;
  • the figure 10 is a plan view of the bridge side of a watch movement constituting a mechanism according to the invention.

Dans le cadre de la présente invention, on entend par « mobile » tout organe rotatif tel que roue, pignon, renvoi ou râteau.In the context of the present invention, the term "mobile" means any rotary member such as wheel, pinion, return or rake.

En référence aux figures 1 à 3, un mécanisme horloger, typiquement un mouvement horloger, selon un mode de réalisation particulier de l'invention comprend un bâti 1 constitué notamment de ponts, ou d'une platine et d'un ou plusieurs ponts, parallèles entre eux. Un engrenage comprenant une roue menée 2 engrenant avec une roue menante 3 est monté dans le bâti 1. Dans l'exemple illustré, l'engrenage 2, 3 est monté en dérivation depuis un rouage de finissage reliant un organe moteur (barillet), représenté schématiquement par la lettre B, à un échappement, représenté schématiquement par la lettre E. Seule une roue 4 du rouage de finissage est représentée sur le dessin. Il s'agit typiquement d'une roue de seconde, constituant la dernière roue du rouage de finissage, située par exemple à 6h. La roue menante 3 engrène avec cette roue 4 et constitue un renvoi entre cette roue 4 et la roue menée 2. La roue menée 2 est une autre roue de seconde, dite « seconde indirecte », située au centre du mouvement. Les roues 2, 3 sont fixées, par exemple par rivetage ou chassage, autour d'axes respectifs 5, 6 sensiblement parallèles et tournant dans des paliers. Chaque roue 2, 3 peut en variante être monobloc avec son axe 5, 6. L'axe 5 de la roue menée 2 porte une aiguille de seconde 7.With reference to Figures 1 to 3 , a watch mechanism, typically a watch movement, according to a particular embodiment of the invention comprises a frame 1 consisting in particular of bridges, or a plate and one or more bridges, parallel to each other. A gear comprising a driven wheel 2 meshing with a driving wheel 3 is mounted in the frame 1. In the illustrated example, the gear 2, 3 is mounted in a shunt from a work train connecting a drive member (barrel), shown schematically by the letter B, to an exhaust, shown schematically by the letter E. Only a wheel 4 of the work train is shown in the drawing. It is typically a second wheel, constituting the last wheel of the finishing train, located for example at 6 o'clock. The driving wheel 3 meshes with this wheel 4 and constitutes a return between this wheel 4 and the driven wheel 2. The driven wheel 2 is another second wheel, called "second indirect", located in the center of the movement. The wheels 2, 3 are fixed, for example by riveting or driving, about respective axes 5, 6 substantially parallel and rotating in bearings. Each wheel 2, 3 may alternatively be monoblock with its axis 5, 6. The axis 5 of the driven wheel 2 carries a second hand 7.

Comme la roue menée 2 se trouve à la fin du train d'engrenages comprenant le rouage de finissage et la roue menante 3, elle subit les jeux d'engrenage et un dispositif doit donc être prévu pour supprimer ces jeux et permettre à l'aiguille 7 de tourner de manière régulière, sans chevrotement. Conformément à la présente invention, ce dispositif est agencé pour rendre réglable la distance entre les axes 5, 6 et comprend plus particulièrement un organe réglable se présentant sous la forme d'une bascule 8.As the driven wheel 2 is at the end of the gear train comprising the finishing gear and the driving wheel 3, it undergoes the gear sets and a device must be provided to remove these sets and allow the needle 7 to turn smoothly, without clogging. According to the present invention, this device is arranged to render adjustable the distance between the axes 5, 6 and more particularly comprises an adjustable member in the form of a rocker 8.

Une partie annulaire 9 de la bascule 8 définit un palier pour l'axe 5 de la roue menée 2. Plus précisément, une pierre percée 10 est fixée (par exemple chassée) dans le trou de la partie annulaire 9 et sert de coussinet à l'axe 5. L'axe 5 traverse la pierre 10 puis le cadran (non représenté) du mouvement et porte à son extrémité l'aiguille 7. De l'autre côté de la roue menée 2 par rapport à la bascule 8, l'axe 5 se termine en un pivot 11 qui tourne dans une pierre percée 12 fixée dans un palier 13 défini par un pont ou platine du bâti 1. L'axe 5 comporte des surfaces d'appui 14, 15 pouvant s'appuyer contre les pierres 10, 12 pour maintenir l'axe 5 en position axiale. L'axe 6 de la roue menante 3 est, lui, monté de manière classique entre des paliers définis par le bâti 1.An annular portion 9 of the rocker 8 defines a bearing for the axis 5 of the driven wheel 2. More specifically, a pierced stone 10 is fixed (eg driven) in the hole of the annular portion 9 and serves as a bearing for the axis 5. The axis 5 passes through the stone 10 and the dial (not shown) of the movement and carries at its end the needle 7. On the other side of the driven wheel 2 relative to the rocker 8, the axis 5 terminates in a pivot 11 which rotates in a pierced stone 12 fixed in a bearing 13 defined by a bridge or plate of the frame 1. The axis 5 has bearing surfaces 14, 15 can bear against the stones 10, 12 to maintain the axis 5 in axial position. The axis 6 of the driving wheel 3 is itself mounted in a conventional manner between bearings defined by the frame 1.

Outre la partie annulaire 9, la bascule 8 comprend une partie d'attache 16 fixée au bâti 1, une partie longiligne flexible (élastique) 17 reliant la partie annulaire 9 à la partie d'attache 16, et une partie longiligne rigide 18 située dans le prolongement de la partie longiligne flexible 17 mais de l'autre côté de la partie annulaire 9. La bascule 8 est typiquement en une seule pièce faite par exemple en acier ou nickel, selon le procédé LIGA. La partie longiligne rigide 18 se termine par une extrémité libre 19 en forme de clé ou fourchette qui reçoit la tête d'un excentrique 20 dont la tige, excentrée par rapport à la tête, est chassée dans le bâti 1. L'excentrique 20 constitue un élément de réglage permettant de régler la position de la bascule 8. Ainsi, une rotation de l'excentrique 20 imprimée au moyen d'un outil tel qu'un tournevis déplace les parties 9, 18, 19 de la bascule 8 suivant un secteur annulaire en causant un fléchissement de la partie longiligne flexible 17. En pratique, le déplacement de la partie annulaire 9 est petit de sorte qu'il peut être approximé en un déplacement linéaire dirigé vers le centre de la roue menante 3. En augmentant le bras de levier la partie rectiligne rigide 18 facilite l'entraînement de la partie annulaire 9 par l'excentrique 20 et permet un déplacement très fin de la partie annulaire 9. Ce déplacement de la partie annulaire 9 cause un déplacement de l'axe 5 de la roue menée 2 qui diminue ou augmente la distance entre les axes 5, 6 selon le sens de rotation de l'excentrique 20. Ainsi, en diminuant la distance entre les axes 5, 6, c'est-à-dire en rapprochant la roue menée 2 de la roue menante 3, la profondeur de pénétration des dents de la roue menée 2 dans la denture de la roue menante 3 est augmentée et les jeux d'engrenage sont réduits voire supprimés. La valeur de distance choisie est celle qui minimise le jeu de l'engrenage 2, 3 tout en évitant un blocage de cet engrenage. De préférence, on choisira comme profil des dents des roues 2, 3 un profil supportant des variations d'entraxe relativement importantes.In addition to the annular portion 9, the latch 8 comprises a fastening portion 16 fixed to the frame 1, a flexible elongate portion (elastic) 17 connecting the annular portion 9 to the attachment portion 16, and a rigid elongate portion 18 located in the extension of the flexible elongate portion 17 but on the other side of the annular portion 9. The rocker 8 is typically a single piece made for example of steel or nickel, according to the LIGA method. The rigid elongated portion 18 terminates in a free end 19 in the shape of a key or fork which receives the head of an eccentric 20 whose stem, eccentric relative to the head, is driven into the frame 1. The eccentric 20 constitutes a setting member for adjusting the position of the rocker 8. Thus, a rotation of the eccentric 20 printed by means of a tool such as a screwdriver moves the parts 9, 18, 19 of the rocker 8 in a sector annular causing a deflection of the flexible elongated portion 17. In practice, the displacement of the annular portion 9 is small so that it can be approximated in a linear movement directed towards the center of the driving wheel 3. By increasing the arm levering the rectilinear rigid portion 18 facilitates the driving of the annular portion 9 by the eccentric 20 and allows a very fine displacement of the annular portion 9. This displacement of the part 9 causes a displacement of the axis 5 of the driven wheel 2 which decreases or increases the distance between the axes 5, 6 according to the direction of rotation of the eccentric 20. Thus, by decreasing the distance between the axes 5, 6 , that is to say by bringing the driven wheel 2 of the driving wheel 3, the depth of penetration of the teeth of the driven wheel 2 in the toothing of the driving wheel 3 is increased and the gear sets are reduced or deleted. The distance value chosen is that which minimizes the play of the gear 2, 3 while avoiding a blockage of this gear. Preferably, it will be chosen as a profile of the teeth of the wheels 2, 3 a profile supporting relatively large spacing variations.

Ce réglage de la distance entre les axes 5, 6 peut être fait lors de l'assemblage du mouvement, plus précisément à la fin de cet assemblage, et est propre à chaque mouvement. Pendant le fonctionnement du mouvement, la bascule 8 reste fixe et les roues 2, 3 engrènent en permanence l'une avec l'autre selon la profondeur de pénétration des dentures préalablement réglée avec le dispositif 8, 20. Un plat 21 ménagé sur la tête de l'excentrique 20 peut servir à limiter la course de la bascule 8 et/ou à indexer l'excentrique 20 pendant l'assemblage.This adjustment of the distance between the axes 5, 6 can be done during the assembly of the movement, more precisely at the end of this assembly, and is specific to each movement. During the operation of the movement, the rocker 8 remains fixed and the wheels 2, 3 meshes permanently with each other according to the depth of penetration of the teeth previously set with the device 8, 20. A flat 21 formed on the head The eccentric 20 can be used to limit the travel of the latch 8 and / or to index the eccentric 20 during assembly.

Dans la présente invention, la diminution des jeux d'engrenage est obtenue sans freinage de la roue menée 2 et donc sans pertes énergétiques. Les seuls frottements auxquels est soumis l'axe 5 sont ceux résultant du contact entre cet axe 5 et les pierres 10, 12. Or les pierres 10, 12, faites par exemple en rubis, ont un très bon coefficient de frottement avec l'axe 5, réalisé par exemple en acier. Des essais effectués sur des mouvements équipés du dispositif 8, 20 ont montré que les jeux d'engrenage pouvaient être réduits ou supprimés sans causer de variation d'amplitude du balancier ni de variation de marche.In the present invention, the reduction of the gear sets is obtained without braking the driven wheel 2 and therefore without energy losses. The only friction to which the axis 5 is subjected are those resulting from the contact between this axis 5 and the stones 10, 12. But the stones 10, 12, made for example of ruby, have a very good coefficient of friction with the axis 5, made for example of steel. Tests carried out on movements equipped with the device 8, 20 have shown that the gear sets could be reduced or eliminated without causing a variation in the amplitude of the balance or a change in gait.

On observera que, comme le pivot 11 tourne dans un palier 13 qui est fixe et non pas réglable comme le palier 9, la perpendicularité de l'axe 5 par rapport aux ponts du bâti 1 (c'est-à-dire par rapport au plan du mouvement) n'est pas conservée lors du déplacement de l'axe 5. Toutefois, compte tenu des faibles déplacements mis en jeu, le défaut de perpendicularité créé n'est pas un problème. Pour permettre l'inclinaison de l'axe 5, un jeu radial plus important que le jeu standard, mais encore suffisamment petit pour que le déplacement du pivot 11 soit maîtrisé, est prévu entre le pivot 11 et la paroi du trou de la pierre 12, le jeu radial entre l'axe 5 et la paroi du trou de la pierre 10 pouvant, lui, être standard. La paroi du trou de la pierre 12 et/ou la surface d'appui de la pierre 12 coopérant avec la surface 15 peuvent être bombées, afin de diminuer les frottements. Dans une variante on pourrait rendre le palier 13 solidaire de la partie rigide 9, 18, 19 de la bascule 8 pour que le déplacement de cette partie rigide (par déformation de la partie flexible 17) déplace l'axe 5 en conservant sa perpendicularité.It will be observed that, as the pivot 11 rotates in a bearing 13 which is fixed and not adjustable as the bearing 9, the perpendicularity of the axis 5 with respect to the bridges of the frame 1 (that is to say with respect to plane of motion) is not retained when axis 5 is moved. However, given the low displacements put into play, the lack of perpendicularity created is not a problem. To allow the inclination of the axis 5, a radial clearance greater than the standard clearance, but still small enough that the displacement of the pivot 11 is controlled, is provided between the pivot 11 and the wall of the hole of the stone 12 , the radial clearance between the axis 5 and the wall of the hole of the stone 10 may itself be standard. The wall of the hole of the stone 12 and / or the bearing surface of the stone 12 cooperating with the surface 15 may be curved in order to reduce friction. In a variant could be made the bearing 13 secured to the rigid portion 9, 18, 19 of the rocker 8 so that the displacement of this rigid portion (by deformation of the flexible portion 17) moves the axis 5 while maintaining its perpendicularity.

La bascule 8 peut être montée dans le bâti 1 au moyen de goupilles 22 liant la partie d'attache 16 à un pont 1 a du bâti 1. La bascule 8 peut être noyée dans le pont 1 a, comme représenté à la figure 2, ou être simplement au-dessus ou au-dessous du pont 1 a. D'autres modes de fixation de la bascule 8 au pont 1 a pourraient être envisagés. Par exemple, la partie d'attache 16 pourrait avoir une forme lui permettant d'être insérée dans une fente du pont 1 a et d'y être fixée par chassage, soudage, collage, sertissage ou autre. Les figures 4, 5 et 6 représentent des exemples d'un tel mode de fixation.The latch 8 can be mounted in the frame 1 by means of pins 22 linking the attachment portion 16 to a bridge 1a of the frame 1. The latch 8 can be embedded in the bridge 1a, as shown in FIG. figure 2 , or simply above or below deck 1 a. Other modes of fixing the flip-flop 8 to the bridge 1a could be envisaged. For example, the attachment portion 16 could have a shape that allows it to be inserted into a slot of the bridge 1a and to be attached by driving, welding, gluing, crimping or otherwise. The Figures 4, 5 and 6 are examples of such a method of attachment.

L'extrémité libre 19 de la bascule 8 coopérant avec l'excentrique 20 pourrait avoir une autre forme que celle représentée aux figures 1 et 2, par exemple une forme annulaire entourant la tête de l'excentrique (figure 7) ou une forme de doigt épousant juste une partie du pourtour de la tête de l'excentrique (figure 8). Dans les modes de réalisation des figures 2 et 7 la rotation de l'excentrique 20 dans un sens ou dans l'autre peut faire fléchir la partie longiligne flexible 17 dans un sens ou dans l'autre. Dans le mode de réalisation de la figure 8 seul un sens de fléchissement de la partie longiligne flexible 17, à savoir celui tendant à rapprocher la roue menée 2 de la roue menante 3, est possible.The free end 19 of the rocker 8 cooperating with the eccentric 20 could have a shape other than that shown in FIGS. figures 1 and 2 , for example an annular shape surrounding the head of the eccentric ( figure 7 ) or a finger shape that fits just around the edge of the eccentric's head ( figure 8 ). In the embodiments of figures 2 and 7 rotating the eccentric 20 in one direction or the other may bend the flexible elongate portion 17 in one direction or the other. In the embodiment of the figure 8 only one direction of deflection of the flexible elongated portion 17, namely that tending to bring the driven wheel 2 of the driving wheel 3, is possible.

Au lieu d'être continue, la rotation de l'excentrique 20 pourrait se faire par pas angulairement définis. Par exemple, des crans pourraient être prévus sur le pourtour de la tête de l'excentrique 20, qui coopéreraient avec un ressort sautoir ou avec des crans prévus sur l'extrémité libre 19 de la bascule 8.Instead of being continuous, the rotation of the eccentric 20 could be done by angularly defined steps. For example, notches could be provided on the around the head of the eccentric 20, which would cooperate with a jumper spring or with notches provided on the free end 19 of the rocker 8.

D'autres types d'élément de réglage qu'un excentrique pourraient être utilisés pour commander le déplacement ou fléchissement de la bascule 8. A la figure 9 est représenté un élément de réglage 23 en forme de vis s'étendant parallèlement au plan du mouvement et dont l'extrémité est en contact avec l'un des deux flancs de la partie longiligne rigide 18 à proximité de l'extrémité libre de la bascule. L'excentrique 20 tel que représenté aux figures 1 à 3 présente toutefois l'avantage, par rapport à la vis 23, de pouvoir être plus facilement rendu accessible depuis l'extérieur du mouvement. Comme le montre la figure 10, après l'assemblage complet du mouvement, la tête de l'excentrique 20 est accessible à un outil à travers une ouverture 24 pratiquée dans un pont du bâti. La figure 10 montre le mouvement du côté ponts, qui est le côté correspondant au fond de la boîte de montre dans laquelle le mouvement est destiné à être incorporé. Ainsi, après assemblage complet de la montre, il suffira de retirer le fond pour accéder à l'excentrique 20.Other types of adjustment element that an eccentric could be used to control the displacement or deflection of the rocker 8. At the figure 9 there is shown an adjusting element 23 in the form of a screw extending parallel to the plane of the movement and the end of which is in contact with one of the two sides of the rigid elongate portion 18 near the free end of the rocker . The eccentric 20 as shown in Figures 1 to 3 However, has the advantage, compared to the screw 23, to be more easily accessible from the outside of the movement. As shown in figure 10 after complete assembly of the movement, the head of the eccentric 20 is accessible to a tool through an opening 24 formed in a bridge of the frame. The figure 10 shows the movement of the bridge side, which is the side corresponding to the bottom of the watch case in which the movement is intended to be incorporated. Thus, after complete assembly of the watch, it will suffice to remove the bottom to access the eccentric 20.

Au lieu d'utiliser un élément de réglage tel que l'excentrique 20 ou la vis 23 on pourrait faire en sorte que l'extrémité libre de la bascule 8 soit maintenue par friction contre une paroi du bâti 1 ou entre des crans de cette paroi. La bascule pourrait alors être déplacée simplement en la poussant au moyen d'un outil.Instead of using a setting element such as the eccentric 20 or the screw 23 could be made so that the free end of the rocker 8 is held by friction against a wall of the frame 1 or between notches of this wall . The flip-flop could then be moved simply by pushing it by means of a tool.

Par ailleurs, la bascule 8 pourrait être entièrement rigide et articulée autour d'un pivot monté dans le bâti.Moreover, the rocker 8 could be entirely rigid and articulated around a pivot mounted in the frame.

Enfin, il va de soi que la présente invention trouve d'autres applications que l'indication d'une seconde indirecte au centre. Par exemple, la roue 2 pourrait être une roue de seconde au centre constituant la dernière roue du rouage de finissage et l'axe de la roue 4, située en dérivation par rapport au rouage de finissage, pourrait porter une aiguille de seconde indirecte décentrée. Dans ce cas, la bascule 8 serait associée à la roue 4, plutôt qu'à la roue 2.Finally, it goes without saying that the present invention finds other applications than the indication of an indirect second in the center. For example, the wheel 2 could be a second wheel in the center constituting the last wheel of the work train and the axis of the wheel 4, located in derivation relative to the work train, could carry an indirect second needle off-center. In this case, the rocker 8 would be associated with the wheel 4, rather than the wheel 2.

Claims (15)

Mécanisme horloger comprenant un bâti (1), des premier et deuxième axes (5, 6) montés dans le bâti (1) et des premier et deuxième mobiles (2, 3) montés autour des premier et deuxième axes (5, 6) respectivement et formant ensemble un engrenage permanent, caractérisé en ce qu'il comprend un dispositif (8, 20) permettant de régler la distance entre lesdits axes (5, 6) pour diminuer le jeu de l'engrenage.Clock mechanism comprising a frame (1), first and second axes (5, 6) mounted in the frame (1) and first and second mobiles (2, 3) mounted around the first and second axes (5, 6) respectively and forming together a permanent gear, characterized in that it comprises a device (8, 20) for adjusting the distance between said axes (5, 6) to reduce the play of the gear. Mécanisme horloger selon la revendication 1, caractérisé en ce que ledit dispositif (8, 20) comprend un organe réglable (8) supportant le premier axe (5).Clock mechanism according to claim 1, characterized in that said device (8, 20) comprises an adjustable member (8) supporting the first axis (5). Mécanisme horloger selon la revendication 2, caractérisé en ce que le deuxième mobile (3) est agencé pour entraîner le premier mobile (2).Clock mechanism according to claim 2, characterized in that the second mobile (3) is arranged to drive the first mobile (2). Mécanisme horloger selon la revendication 3, caractérisé en ce que le premier mobile (2) est le dernier mobile d'un train d'engrenages (4, 3) dont fait également partie le deuxième mobile (3).Clock mechanism according to claim 3, characterized in that the first mobile (2) is the last mobile of a gear train (4, 3) which also includes the second mobile (3). Mécanisme horloger selon la revendication 3 ou 4, caractérisé en ce que le premier axe (5) porte une aiguille indicatrice (7).Clock mechanism according to claim 3 or 4, characterized in that the first axis (5) carries an indicator needle (7). Mécanisme horloger selon la revendication 5, caractérisé en ce que le premier axe (5) porte une aiguille indicatrice de seconde indirecte (7).Clock mechanism according to claim 5, characterized in that the first axis (5) carries an indirect second indicator needle (7). Mécanisme horloger selon l'une quelconque des revendications 2 à 6, caractérisé en ce que le premier axe (5) est supporté d'un côté du premier mobile (2) par un palier fixe (13) défini par le bâti (1) et de l'autre côté du premier mobile (2) par l'organe réglable (8).Clock mechanism according to one of Claims 2 to 6, characterized in that the first axis (5) is supported on one side of the first mobile (2) by a fixed bearing (13) defined by the frame (1) and on the other side of the first mobile (2) by the adjustable member (8). Mécanisme horloger selon l'une quelconque des revendications 2 à 7, caractérisé en ce que l'organe réglable (8) est sous la forme d'une bascule comprenant une partie annulaire (9) entourant le premier axe (5).Clock mechanism according to any one of claims 2 to 7, characterized in that the adjustable member (8) is in the form of a rocker comprising an annular portion (9) surrounding the first axis (5). Mécanisme horloger selon la revendication 8, caractérisé en ce que la partie annulaire (9) entoure une pierre (10) qui elle-même entoure le premier axe (5).Clock mechanism according to claim 8, characterized in that the annular portion (9) surrounds a stone (10) which itself surrounds the first axis (5). Mécanisme horloger selon la revendication 8 ou 9, caractérisé en ce que l'organe réglable (8) comprend en outre une partie (16) d'attache au bâti (1) et une partie longiligne flexible (17) reliant la partie d'attache (16) à la partie annulaire (9).Clock mechanism according to claim 8 or 9, characterized in that the adjustable member (8) further comprises a portion (16) for attachment to the frame (1) and a flexible elongate portion (17) connecting the attachment part (16) at the annular portion (9). Mécanisme horloger selon la revendication 10, caractérisé en ce que l'organe réglable (8) comprend en outre une partie longiligne rigide (18) s'étendant sensiblement dans le prolongement de la partie longiligne flexible (17) depuis la partie annulaire (9) jusqu'à une extrémité libre (19).Clock mechanism according to claim 10, characterized in that the adjustable member (8) further comprises a rigid elongated portion (18) extending substantially in the extension of the flexible elongated portion (17) from the annular portion (9). to a free end (19). Mécanisme horloger selon l'une quelconque des revendications 2 à 11, caractérisé en ce que ledit dispositif (8, 20) comprend en outre un élément (20 ; 23) de réglage de l'organe réglable (8), cet élément de réglage (20 ; 23) étant actionnable par l'intermédiaire d'un outil.Clock mechanism according to any one of claims 2 to 11, characterized in that said device (8, 20) further comprises a member (20; 23) for adjusting the adjustable member (8), this adjusting element ( 20; 23) being operable by means of a tool. Mécanisme horloger selon la revendication 12 lorsqu'elle dépend de la revendication 11, caractérisé en ce que l'élément de réglage (20 ; 23) coopère avec ladite extrémité libre (19).Clock mechanism according to claim 12 when dependent on claim 11, characterized in that the adjusting element (20; 23) cooperates with said free end (19). Mécanisme horloger selon la revendication 12 ou 13, caractérisé en ce que l'élément de réglage (20) est un excentrique.Clock mechanism according to claim 12 or 13, characterized in that the adjusting element (20) is an eccentric. Mécanisme horloger selon l'une quelconque des revendications 12 à 14, caractérisé en ce qu'il consiste en un mouvement horloger et en ce que l'élément de réglage (20) est accessible depuis l'extérieur du mouvement après assemblage complet dudit mouvement.Clock mechanism according to any one of claims 12 to 14, characterized in that it consists of a watch movement and in that the adjusting element (20) is accessible from the outside of the movement after complete assembly of said movement.
EP12004340.1A 2012-06-07 2012-06-07 Clock mechanism with gear backlash reduction Withdrawn EP2672334A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12004340.1A EP2672334A1 (en) 2012-06-07 2012-06-07 Clock mechanism with gear backlash reduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12004340.1A EP2672334A1 (en) 2012-06-07 2012-06-07 Clock mechanism with gear backlash reduction

Publications (1)

Publication Number Publication Date
EP2672334A1 true EP2672334A1 (en) 2013-12-11

Family

ID=46603472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12004340.1A Withdrawn EP2672334A1 (en) 2012-06-07 2012-06-07 Clock mechanism with gear backlash reduction

Country Status (1)

Country Link
EP (1) EP2672334A1 (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH6556A (en) * 1893-04-12 1893-11-30 Paul Perret Advanced watch
CH14635A (en) * 1897-05-19 1898-01-15 Mathey Charles Adolphe New watch size, Roskopf system, straight line exhaust with exhaust adjuster without exhaust holder
CH40213A (en) * 1907-10-29 1908-06-01 Roskopf & Cie K Improvement in the movement of watches of the so-called `` Roskopf '' genre
CH131854A (en) * 1928-04-03 1929-03-15 Tavannes Watch Co Sa Cylinder exhaust.
GB380772A (en) * 1930-06-14 1932-09-22 Ferdinand Schneider Driving mechanism for clocks that are wound or driven by an electric motor
CH202902A (en) * 1938-04-11 1939-02-15 Ebosa Sa Anchor escapement.
GB991708A (en) * 1960-09-17 1965-05-12 Lip Sa Improvements in or relating to clockwork escapement mechanisms
CH506824A (en) 1968-06-28 1970-12-31 Valjoux Sa Device producing friction on a rotating part of a clockwork movement
US3609961A (en) 1970-02-16 1971-10-05 Citizen Watch Co Ltd Positioning mechanism for pressure spring means in timepieces
EP0217251A1 (en) 1985-10-02 1987-04-08 Eta SA Fabriques d'Ebauches Magnetic backlash eliminator for a time piece
JP2003279670A (en) * 2002-03-22 2003-10-02 Seiko Epson Corp Timepiece
JP2008096192A (en) * 2006-10-10 2008-04-24 Seiko Instruments Inc Bearing mechanism for timepiece gear train, timepiece gear train structure, and timepiece equipped therewith

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH6556A (en) * 1893-04-12 1893-11-30 Paul Perret Advanced watch
CH14635A (en) * 1897-05-19 1898-01-15 Mathey Charles Adolphe New watch size, Roskopf system, straight line exhaust with exhaust adjuster without exhaust holder
CH40213A (en) * 1907-10-29 1908-06-01 Roskopf & Cie K Improvement in the movement of watches of the so-called `` Roskopf '' genre
CH131854A (en) * 1928-04-03 1929-03-15 Tavannes Watch Co Sa Cylinder exhaust.
GB380772A (en) * 1930-06-14 1932-09-22 Ferdinand Schneider Driving mechanism for clocks that are wound or driven by an electric motor
CH202902A (en) * 1938-04-11 1939-02-15 Ebosa Sa Anchor escapement.
GB991708A (en) * 1960-09-17 1965-05-12 Lip Sa Improvements in or relating to clockwork escapement mechanisms
CH506824A (en) 1968-06-28 1970-12-31 Valjoux Sa Device producing friction on a rotating part of a clockwork movement
US3609961A (en) 1970-02-16 1971-10-05 Citizen Watch Co Ltd Positioning mechanism for pressure spring means in timepieces
EP0217251A1 (en) 1985-10-02 1987-04-08 Eta SA Fabriques d'Ebauches Magnetic backlash eliminator for a time piece
JP2003279670A (en) * 2002-03-22 2003-10-02 Seiko Epson Corp Timepiece
JP2008096192A (en) * 2006-10-10 2008-04-24 Seiko Instruments Inc Bearing mechanism for timepiece gear train, timepiece gear train structure, and timepiece equipped therewith

Similar Documents

Publication Publication Date Title
EP2927756A1 (en) Clock movement provided with a drive mechanism for an analogue indicator with periodic or intermittent movement
CH698827B1 (en) Device reset for a timepiece.
EP2787400A1 (en) Clockwork with tourbillon and balance stop mechanism
EP3101486B1 (en) Heart of timepiece or chronograph
EP2226687B1 (en) Disengaging device for timepiece mechanism, and watch movement comprising this device
EP2919077B1 (en) Device for driving an analogue indicator, in particular a date ring
EP3173877B1 (en) Timepiece calendar system
EP2798414B1 (en) Spring for clock movement
WO2013102598A2 (en) Spring for clock movement
CH715052A2 (en) Constant torque mechanism, timepiece movement, and timepiece.
EP2672334A1 (en) Clock mechanism with gear backlash reduction
EP3707563B1 (en) Timepiece drive member
EP3026506A1 (en) Timer with speed selector
EP0563745B1 (en) Clockwork provided with guide means of a control organ such as a stem
EP3629100B1 (en) Symmetrical device for guiding two elements, especially for timepieces
EP3783444B1 (en) Timepiece mechanism comprising a locking device
EP3851919B1 (en) Repositioning device for timepieces
EP3349072B1 (en) Mechanism for timepiece comprising a cam and a finger
EP3855255A1 (en) Locking device for timepieces
CH706341A2 (en) Time setting mechanism for watch, has lever/pull knob system controlling pinion sliding with rod and allowing positioning of pinion in its engagement positions, and axial maintenance unit maintaining pull knob in its swiveling plane
CH711246A2 (en) Watch movement with vertical control rod.
CH716774B1 (en) Watchmaking coupling and indexing device.
CH715317A2 (en) Timepiece with an adjustable friction device.
CH709349A2 (en) An analog indicator device drive, in particular a date ring.
EP2689294A1 (en) Jumper, and timepiece movement and timepiece comprising such a jumper

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140612