EP2010971B1 - Mouvement pour piece d'horlogerie a affichage retrograde - Google Patents

Mouvement pour piece d'horlogerie a affichage retrograde Download PDF

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Publication number
EP2010971B1
EP2010971B1 EP07727533A EP07727533A EP2010971B1 EP 2010971 B1 EP2010971 B1 EP 2010971B1 EP 07727533 A EP07727533 A EP 07727533A EP 07727533 A EP07727533 A EP 07727533A EP 2010971 B1 EP2010971 B1 EP 2010971B1
Authority
EP
European Patent Office
Prior art keywords
cam
rotation
lever
rocker
periphery
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.)
Not-in-force
Application number
EP07727533A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2010971A2 (fr
Inventor
Alberto Papi
Nicolas Dehon
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.)
Sowind SA
Original Assignee
Sowind 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 Sowind SA filed Critical Sowind SA
Publication of EP2010971A2 publication Critical patent/EP2010971A2/fr
Application granted granted Critical
Publication of EP2010971B1 publication Critical patent/EP2010971B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands

Definitions

  • the present invention relates to a display module, for watch movement for driving a retrograde display member of at least one hourly information, comprising a frame carrying drive means for driving the display member comprising a mobile, intended to be driven by a finishing gear of the watch movement and carrying a first cam of the same axis of rotation with reference to the frame.
  • the display module also comprises a rocker bearing a probe arranged to bear against the periphery of the first cam under the effect of deformable elastic means undergoing deformation of variable amplitude. The latter causes the application of a corresponding force on the rocker, depending on the distance separating the probe from the axis of rotation of the first cam.
  • the display module further comprises transmission means for connecting the flip-flop to the drive means of the retrograde display member.
  • the present invention also relates to a watch movement having the above characteristics as well as a timepiece comprising such a movement.
  • each of the corresponding mechanisms comprises a rocker with two arms connected by a bend, in the region of which pivots the rocker relative to the frame of the movement.
  • the free end of a first arm carries a feeler disposed in abutment against the periphery of a cam driven in rotation by the movement finishing work train, while the free end of the second arm carries a rake arranged in engagement with a mobile drive of a display member.
  • a long spring is connected to the frame by a first of its ends while its second end is arranged to apply a force on the rocker, to maintain the probe in contact with the cam.
  • This type of construction has certain drawbacks, in particular related to the application, to the gear train of the movement, of a friction force having a large variation in amplitude between two extreme positions of the rocker. Indeed, it is found, on the one hand, that the axis of rotation of the rocker is relatively far from the probe and, secondly, that the point of support of the spring on the rocker is provided at the probe and is therefore also distant from the axis of rotation of the rocker. This results in a large amplitude of the deformations of the spring between the one and the other of the extreme positions of the rocker, ie a large amplitude of the variation of the force that this spring applies to the rocker.
  • the rocker being disposed in abutment on a cam, itself driven in rotation by the gear train of the movement, it follows a disturbance of the movement of the movement which may have significant values of deviation.
  • the document FR 743.618 discloses a second cam on which the return spring is supported.
  • the present invention defined by claim 1, has for main purpose to overcome the disadvantages of the known mechanisms of the prior art, by proposing a movement for a retrograde timepiece in which the means for implementing the Retrograde display does not disturb the movement.
  • the present invention more particularly relates to a movement for a timepiece of the type mentioned above, characterized in that a force regulating device is interposed between the elastic means and the rocker.
  • the operation of the movement has a better accuracy.
  • this accuracy is maintained even in the case where the movement is suitable for driving a display member over a large angular sector, in particular greater than 60 degrees, preferably greater than 120 degrees.
  • the mobile is driven by a wheel frictionally mounted on a barrel wheel tube, the rocker having a rake having a toothing arranged in engagement with a toothing of a pinion mounted free in rotation on the barrel wheel tube and rotationally integral with an additional tube, the latter being intended to drive, at least indirectly, a display member of a time information.
  • the force regulation device comprises a second cam disposed integrally with the rocker having the same axis of rotation as the latter.
  • the elastic means preferably comprise a long spring having a straight portion of which a free end is disposed in abutment against the periphery of the second cam.
  • the rocker undergoes the force generated by the elastic means via its rake, the pinion and the additional cam whose periphery makes it possible to regulate the force effectively transmitted to the rocker.
  • the periphery of the additional cam has a shape corresponding at least partially to a logarithmic curve portion.
  • a roller may be carried by the additional probe to ensure the contact between the additional rocker and the periphery of the additional cam with the least possible friction.
  • such a movement can be implemented in a timepiece comprising a display member of a time magnitude scanning an angular sector of angle greater than 120 degrees, such as for example a display of hours on a clock. 270 degree sector.
  • FIG. 1 represents a simplified top view of a detail of the timepiece movement according to a first variant of a preferred embodiment of the present invention, in a first configuration;
  • the figure 2 represents a simplified top view similar to the view of the figure 1 in a second configuration
  • FIG. 3 represents a simplified cross-sectional view of the movement of the preceding figures
  • FIG. 4 represents a simplified top view of a detail of the timepiece movement according to a second variant of a preferred embodiment of the present invention.
  • the figure 5 represents a simplified cross-sectional view of the movement of the figure 4 .
  • the figure 1 represents a top view of a construction detail of the movement according to a first variant of a preferred embodiment of the present invention, more particularly of its mechanism for implementing a retrograde display. This mechanism is presented in a first configuration on the figure 1 whereas it will be presented in a second configuration, different, on the figure 2 .
  • the embodiment described concerns a mechanism for driving a pointer 1 for indicating the retrograde-type display hours, in particular in relation to a graduated sector (not visible) extending over an angle of 270 degrees.
  • FIGS are schematically represented in the implementation of the movement according to the invention in a timepiece comprising a box including a middle part 2.
  • the movement comprises a plate (not shown) on which the module of display and, in a hole of which is mounted a time setting rod 3, better visible on the figure 3 .
  • the hour hand 1 is disposed at the center of the timepiece being driven by a cannon wheel (reference 4, figure 3 ) whose tube 5 carries an additional tube 6, mounted free to rotate on the barrel wheel.
  • the barrel wheel is driven in a conventional manner by a work train (not visible) of the movement, the latter being of mechanical or electromechanical type without affecting the object of the present invention.
  • An hour wheel 7 is also mounted frictionally on the tube 5 of the barrel wheel.
  • a mobile 8 is disposed at a distance from the hour wheel 7 and carries a control wheel 9 and a first cam 10 whose periphery has a spiral shape.
  • the control wheel 9 and the first cam 10 are made integral in rotation, by means of a pin 11, and have a same axis of rotation 12 with reference to the frame of the movement.
  • the control wheel 9 has a peripheral toothing arranged in engagement with the toothing of the hour wheel 7, so that the first cam 10 is rotated, in the counter clockwise on the figure 1 , by the movement of the hour wheel 7.
  • the retrograde display mechanism further comprises a rocker 20, rotatably mounted on the frame of the movement, along an axis X located in the immediate vicinity of the periphery of the control wheel 9. Starting from its region mounted to pivot on the X axis, the rocker 20 has two arms 21 and 22.
  • the first arm 21 initially comprises two portions 23 and 24 deviating from each other before joining to form a loop in the extension of which extends a probe 25.
  • the free end 26 of the probe, completed in point, is placed in abutment against the periphery of the first cam 10.
  • the second arm 22 has an elongated and curved shape, to bypass the first cam 10, ending in a rake 27, arranged in engagement with a pinion 28 integral with the additional tube 6.
  • a second cam 30 is rotatably mounted on the X axis, being integral with the latch 20.
  • the latter has a heart-shaped periphery, more precisely defined by a double curvature, each of which corresponds to a logarithmic curve portion.
  • a long spring 31 is fixed to the frame of the movement, by means of a screw 32, by a first end 33 wound in the form of a ring, while its second end 34 has a flat surface 35 arranged in abutment against the periphery of the second cam 30.
  • a pin 36 integral with the frame, forms a counter-support to prevent the rotation of the spring in the counterclockwise direction.
  • the end 34 may be provided with a support carrying a roller (such as that visible on the figures 4 and 5 ) for ensuring contact between the long spring 31 and the periphery of the cam 30.
  • the first cam 10 rotates in the counterclockwise direction of rotation, it has an increasing radius opposite the position of the probe 25, causing a rotation of the rocker 20 in the same direction. While the rocker rotates relative to its axis X, the rake 27 induces a rotational movement of the additional tube 6, in the clockwise direction, the latter being free to rotate relative to the barrel wheel.
  • the hour hand 1 evolves with regard to graduations which can extend for example over twelve hours between the initial and final positions of the needle, these positions being spaced at an angle of 270 degrees according to the present method of realization, as an indication.
  • the second cam 30 also rotates in the anti-clockwise direction by slightly deforming the spring 31 as its radius increases in the region of contact of the flat surface 35.
  • the stiffness constant of the spring 31 is adjusted so that the contact of the tip 26 of the probe on the periphery of the first cam is guaranteed at every moment, without generating too much friction.
  • the probe 25 thus has a gradual and continuous distance with reference to the axis of rotation 12 of the first cam 10. Small crosses are shown on the periphery of the first cam to identify the positions respectively corresponding to each of the hours displayed by the hour hand 1 opposite the graduations.
  • the figure 2 represents a view similar to that of the figure 1 , in a different configuration of the retrograde display mechanism, more precisely, a little less than twelve hours after the configuration of the figure 1 , the first cam 10 having performed almost a complete revolution in this interval.
  • the hour hand 1 has undergone an angular displacement of the order of 270 degrees at the same time.
  • the spring tension variation between these two extreme positions of the probe advantageously has a negligible impact on the progress of the finishing train.
  • This particular characteristic also allows the use of indication sector of hourly magnitudes of greater angular amplitude than with the previous mechanisms.
  • the action of the spring on the rocker, via the second cam 30, makes it possible to obtain a slower return of the hour hand 1 in its initial position than in the timepieces according to the art. previous, in which the spring acts directly on the rocker. It may be noted that the theoretical return speed of the needle is constant during the duration of this movement due to the use of a logarithmic curve, which is not the case if the cam has a periphery whose shape is based on the Archimedes curve, particularly in the rest position area shown on the figure 1 that is why the first is preferred.
  • the figure 3 represents a simplified cross-sectional view of a part of the movement which has just been described in relation to the figures 1 and 2 .
  • the time setting rod 3 carries, in a conventional manner, a winding pinion 41 arranged in engagement with a crown wheel 42 of the movement, to effect the winding a barrel spring (not shown), and a sliding pinion 43 which can be brought into engagement with a return 44, itself engaged with the barrel wheel 4 to perform the time setting of display organs.
  • the hour wheel 7 is driven simultaneously with the barrel wheel 4 to rotate the control wheel 9 and the first cam 10 and, consequently, the additional tube 6 carrying the hour hand 1.
  • the figures 4 and 5 are, respectively in simplified top view and cross-sectional view, a display module for watch movement according to a second variant of a preferred embodiment of the present invention.
  • the second variant differs from the first by a different arrangement of the elastic means to ensure a good quality of contact between the probe 25 and the periphery of the first cam 10, the force regulating means applied to the rocker being adapted Consequently.
  • the additional tube 6 carrying the pinion 28 is further secured to an additional cam 50 having a periphery of variable radius.
  • the latter presents, from its lowest radius to its largest radius, a shape corresponding to a portion of a logarithmic curve. Furthermore, the regions of smaller radius and greater radius are connected by a substantially radial flank 51.
  • the display module according to the second embodiment further comprises an additional rocker 52 rotatably mounted on the frame of the movement, along an axis of rotation located at a distance from the axis of rotation of the gun wheel 4.
  • the additional rocker 52 comprises a base 53 from which extends an arm 54 whose free end carries a feeler 55, here made in the form of a support 56 carrying a roller 57 intended to be placed in abutment against the periphery of the additional cam 50.
  • a feeler 55 here made in the form of a support 56 carrying a roller 57 intended to be placed in abutment against the periphery of the additional cam 50.
  • the implementation of such a roller makes it possible to reduce the friction arising from the contact between the feeler 55 and the periphery of the additional cam 50, when the latter is rotated under the effect of the cooperation between the rake 27 and the pinion 28.
  • the roller may be made of ruby or sapphire, as a non-limiting indicative.
  • the base 53 of the additional rocker comprises a bearing surface 58 having the shape of an edge.
  • a long spring 61 is fixed to the frame of the movement, by means of a screw 62, by a first end 63 wound in the form of a ring, while its second end 64, free, is placed in abutment against the bearing surface. 58 of the additional cam 50.
  • a screw 66 integral with the frame, forms a counter-support to prevent the rotation of the spring in the clockwise direction, thereby causing its deformation when the bearing surface 58 is rotated in the counter-clockwise, under the effect of increasing the radius of the additional cam 50.
  • the screw 66 is preferably an eccentric whereby the orientation of the long spring 61 can be adjusted with a large position.
  • the first cam 10 rotates in the counterclockwise direction of rotation, it has an increasing radius opposite the position of the probe 25, causing a rotation of the rocker 20 in the same direction. While the rocker rotates relative to its axis X, the rake 27 induces a rotational movement of the additional tube 6, in the clockwise direction, the latter being free to rotate relative to the barrel wheel.
  • the hour hand 1 evolves with respect to graduations that can extend for example over twelve hours between the initial and final positions of the needle.
  • the additional cam 50 rotates simultaneously in the clockwise direction, thus presenting an increasing radius to the probe 55 of the additional rocker 52 which rotates, therefore, in the counter-clockwise direction.
  • the rotation of the additional rocker causes a progressive deformation of the spring 61 as the radius of the periphery of the additional cam increases.
  • the rocker 20 undergoes each moment, except during the brief retrograde movement, two opposing forces, namely a first force tending to turn it in the counterclockwise direction and exerted by the periphery of the first cam 10 , and a second force tending to turn it clockwise under the effect of the deformation of the spring 61, generating a force transmitted to the rocker 20 via the additional rocker 52, its probe 55, the periphery of the additional cam 50, the pinion 28 and the rake 27.
  • the force generated by the deformation of the spring 61 is regulated by the shape of the periphery of the additional cam 50 which makes it possible to control the corresponding torque transmitted to the pinion 28.
  • the regulation is carried out here with a better precision insofar as the additional cam 50 has a rotation angle much greater than that of the second cam 30 between the two extreme positions of the display member 1.
  • the present variant offers a reduction ratio the rotation of the rocker 20 through the gear connection between the rake 27 and the pinion 28 allowing the additional cam 50 to have a larger useful portion of its periphery than that of the second cam 30 of the first variant.
  • this construction because of the antagonistic forces it generates, has the additional advantage of preventing the occurrence of a game at the level of the gear connection provided between the pinion 28 and the rake 27.
  • the stiffness constant of the spring 61 is adjusted so that the contact of the tip 26 of the probe on the periphery of the first cam 10 is guaranteed at all times, without causing too much friction.
  • this geometry makes it possible to arrange the axis of rotation of the rocker in the immediate vicinity of the cam while having the possibility of applying the force of the spring in the vicinity of this same axis.
  • the skilled person may choose a different rocker geometry according to his own needs.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
EP07727533A 2006-03-29 2007-03-29 Mouvement pour piece d'horlogerie a affichage retrograde Not-in-force EP2010971B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00516/06A CH698826B1 (fr) 2006-03-29 2006-03-29 Mouvement pour pièce d'horlogerie à affichage rétrograde.
PCT/EP2007/053061 WO2007110451A2 (fr) 2006-03-29 2007-03-29 Mouvement pour piece d'horlogerie a affichage retrograde

Publications (2)

Publication Number Publication Date
EP2010971A2 EP2010971A2 (fr) 2009-01-07
EP2010971B1 true EP2010971B1 (fr) 2010-11-03

Family

ID=37663875

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07727533A Not-in-force EP2010971B1 (fr) 2006-03-29 2007-03-29 Mouvement pour piece d'horlogerie a affichage retrograde

Country Status (7)

Country Link
US (1) US7974156B2 (zh)
EP (1) EP2010971B1 (zh)
JP (1) JP5145323B2 (zh)
CN (1) CN101438213B (zh)
CH (1) CH698826B1 (zh)
DE (1) DE602007010270D1 (zh)
WO (1) WO2007110451A2 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017158536A1 (fr) 2016-03-15 2017-09-21 Chanel Sa Genève Mecanisme pour mouvement de montre
US10222749B2 (en) 2016-02-18 2019-03-05 Blancpain Sa Retrograde timepiece display with a retractable hand

Families Citing this family (13)

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Publication number Priority date Publication date Assignee Title
EP2085833A1 (fr) * 2008-01-31 2009-08-05 CT Time S.A. Mouvement d'horlogerie modulaire
CH699455B1 (fr) * 2008-09-05 2013-03-28 Montres Paul Picot S A Soc D Mécanisme d'affichage d'une information périodique.
CH704775A2 (fr) * 2011-04-08 2012-10-15 Richemont Int Sa Mécanisme de chronographe.
JP5850767B2 (ja) * 2012-03-02 2016-02-03 セイコーインスツル株式会社 レトログラード表示機構、ムーブメント、レトログラード表示機構を備えたアナログ時計及び動力切替方法
EP2757426B1 (fr) * 2013-01-22 2017-11-08 Montres Breguet SA Dispositif de guidage d'arbre d'horlogerie
EP2824521A3 (fr) 2013-07-12 2016-06-01 Rolex Sa Mécanisme horloger, mouvement horloger et pièce d'horlogerie
EP2824517A3 (fr) * 2013-07-12 2016-06-01 Rolex Sa Mécanisme horloger, mouvement horloger et pièce d'horlogerie
EP3059642B1 (fr) 2015-02-23 2019-05-22 Montres Breguet S.A. Mécanisme de chronographe
CN106338906B (zh) * 2016-08-27 2018-11-27 青岛懿姿饰品股份有限公司 一种磁驱饰品及其制造方法
CH712973B1 (de) * 2016-09-23 2023-12-29 Bucherer Ag Tourbillon und Uhr mit Tourbillon.
CH713354B1 (fr) * 2017-01-13 2022-11-30 Mft Et Fabrique De Montres Et Chronometres Ulysse Nardin Le Locle S A Mécanisme pour pièce d'horlogerie comportant une came et un palpeur, notamment pour montre régate ou montre à sonnerie.
EP3486735B1 (fr) * 2017-11-20 2020-09-30 Montres Breguet S.A. Mécanisme horloger de remise à zéro de la seconde à came en colimaçon
EP3637197B1 (fr) * 2018-10-12 2021-05-19 Blancpain SA Dispositif de reglage d'un affichage retrograde d'horlogerie

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CH676309B5 (zh) * 1989-03-30 1991-07-15 Phare Jean D Eve Sa Le
IT1295123B1 (it) * 1997-03-21 1999-04-30 Luca Russi Dispositivo a camme per trasformare il movimento rotatorio delle lancette di un orologio in un movimento alternato lungo un arco di 120
CH691087A5 (fr) * 1997-04-04 2001-04-12 Gerald Genta Sa Pièce d'horlogerie, notamment montre-bracelet.
CH691833A5 (fr) * 1997-09-25 2001-10-31 Vacheron & Constantin S A Module d'affichage pour pièce d'horlogerie, notamment montre-bracelet, comportant un affichage sautant des heures et un affichage rétrograde des minutes.
CH694349A5 (fr) 2001-03-01 2004-11-30 Franck Muller Watchland Sa Pièce d'horlogerie à affichage rétrograde des heures et des minutes.
JP4475630B2 (ja) * 2004-01-27 2010-06-09 セイコーインスツル株式会社 変形セグメント歯車を含むぜんまい巻き状態表示装置付き時計
JP4626971B2 (ja) * 2004-12-15 2011-02-09 セイコーインスツル株式会社 戻しばねを含む扇形運針機構を有する多機能時計および扇形運針輪列装置
US7961560B2 (en) * 2005-01-24 2011-06-14 Seiko Epson Corporation Display device for timepiece, movement, and timepiece
JP4453645B2 (ja) * 2005-01-24 2010-04-21 セイコーエプソン株式会社 時計の表示装置、ムーブメント、および時計

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10222749B2 (en) 2016-02-18 2019-03-05 Blancpain Sa Retrograde timepiece display with a retractable hand
WO2017158536A1 (fr) 2016-03-15 2017-09-21 Chanel Sa Genève Mecanisme pour mouvement de montre

Also Published As

Publication number Publication date
CN101438213B (zh) 2011-02-23
JP5145323B2 (ja) 2013-02-13
JP2009531689A (ja) 2009-09-03
WO2007110451A3 (fr) 2008-05-15
DE602007010270D1 (de) 2010-12-16
US20100246341A1 (en) 2010-09-30
CH698826B1 (fr) 2009-11-13
CN101438213A (zh) 2009-05-20
WO2007110451A2 (fr) 2007-10-04
EP2010971A2 (fr) 2009-01-07
US7974156B2 (en) 2011-07-05

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