EP0573839B1 - Extra-flat clockwork-movement - Google Patents

Extra-flat clockwork-movement Download PDF

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Publication number
EP0573839B1
EP0573839B1 EP93108400A EP93108400A EP0573839B1 EP 0573839 B1 EP0573839 B1 EP 0573839B1 EP 93108400 A EP93108400 A EP 93108400A EP 93108400 A EP93108400 A EP 93108400A EP 0573839 B1 EP0573839 B1 EP 0573839B1
Authority
EP
European Patent Office
Prior art keywords
barrel
ratchet
pivoted
movement
ball bearing
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
EP93108400A
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German (de)
French (fr)
Other versions
EP0573839A1 (en
Inventor
Pierre Mathys
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.)
Frederic Piguet SA
Original Assignee
Frederic Piguet 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 Frederic Piguet SA filed Critical Frederic Piguet SA
Publication of EP0573839A1 publication Critical patent/EP0573839A1/en
Application granted granted Critical
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Expired - Lifetime legal-status Critical Current

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    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles
    • 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
    • G04B33/00—Calibers
    • G04B33/06—Calibers of extremely flat shape

Definitions

  • the present invention relates to an ultra-thin watch movement with manual or automatic winding, comprising at least one barrel and all the mobiles of which are mounted in cantilever on a single plate and each using a single ball bearing.
  • the object of the present invention is to eliminate this friction.
  • the watch movement according to the invention is characterized in that the ratchet is in the form of a drum surrounding the barrel drum and pivoted by its periphery using at least three rollers each pivoted on a ball bearing and that the barrel is pivoted in the ratchet.
  • This construction which is totally different from the conventional construction of barrels, makes it possible to eliminate the friction which has been mentioned above, since the barrel drum is free to move under the effect of the torsion described above.
  • the ratchet being only a passive, immobile member, the friction that it can meet at the level of its pivoting rollers play only a secondary role. Thanks to the ball bearing, they are however very low and are negligible in the case of an automatic oscillating mass execution.
  • the barrel is preferably pivoted in the ratchet by means of a ball bearing mounted in a hub of the ratchet.
  • the movement comprises, on and in a single plate 1, two identical barrels 2 and 3 rotating in opposite directions and attacking a common reference 4 meshing with the center pinion 5.
  • the barrel 2 is associated with the gear train comprising successively a pinion of finishing 6, the large average 7, the small average 8, the second wheel 2 and the escape wheel 10 to reach the balance 11.
  • the finishing pinion 6 meshes with the pinion 12 of the large medium 7. We can still distinguish the timer 13 and the mobile 14 of the manual winding train.
  • the two barrels are produced in an identical manner and it will be sufficient to describe the construction of the barrel 3.
  • the drum of the barrel 3 is provided with a pin 22 driven into the inner cage of a ball bearing 23 whose outer cage is driven into the hub 24 of a ratchet 25 in the form of a drum, that is to say provided with a crown 26 surrounding the barrel drum.
  • the ratchet 25 has externally a peripheral groove 27 in which engage the slices of rollers pivoted on the plate by means of a ball bearing and ensuring the pivoting of the ratchet 25 by its periphery.
  • Such rollers are shown in detail in patent CH 610 178. They are shown schematically in Figure 1 at 28, 29, 30, 31, 32. Each of the ratchets 25 and 33 is therefore pivoted by means of three rollers, the roller 30 being common to the two ratchets.
  • the hub 24 of the ratchet therefore constitutes the bung of the barrel and it is provided with a hook 34 for the barrel spring.
  • the barrel drums 2 and 3 are therefore pivoted only by their center in a ball bearing reducing friction to a minimum.
  • the new barrel design is of course applicable to a movement comprising only one barrel.
  • the movement described could be equipped with an oscillating weight to make it an automatic movement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Electromechanical Clocks (AREA)

Description

La présente invention a pour objet un mouvement de montre extra-plat à remontage manuel ou automatique, comprenant au moins un barillet et dont tous les mobiles sont montés en porte-à-faux sur une seule platine et chacun à l'aide d'un seul roulement à billes.The present invention relates to an ultra-thin watch movement with manual or automatic winding, comprising at least one barrel and all the mobiles of which are mounted in cantilever on a single plate and each using a single ball bearing.

L'utilisation de roulement à billes miniature a permis de pivoter les mobiles d'un mouvement en porte-à-faux sur une platine unique et de construire ainsi des mouvements extra-plats dont l'épaisseur, dans leur version à remontage manuel, ne dépasse pas 1,5 mm. Une telle construction est décrite dans le brevet CH 610 178. Dans ce mouvement, le barillet est pivoté, dans l'épaisseur du mouvement, par sa périphérie à l'aide de trois galets pivotés chacun sur un roulement à bille miniature et le rochet est pivoté sur l'axe du barillet. On a cherché à réduire encore l'épaisseur du mouvement. Or, une telle réduction s'accompagne inévitablement d'une diminution de la largeur du ressort moteur logé dans le barillet, c'est-à-dire d'une diminution de l'énergie disponible lorsque le ressort est armé, c'est-à-dire une diminution de la réserve de marche de la montre. Il est certes possible de compenser cette diminution d'énergie en utilisant deux barillets comme ceci est enseigné dans le brevet CH 375 289, mais avec d'aussi faibles dimensions de ressort-moteur, l'importance des frottements et des pertes d'énergie qui en résultent croît.The use of miniature ball bearings made it possible to pivot the mobiles with a cantilever movement on a single plate and thus to build extra-flat movements whose thickness, in their version with manual winding, does not not exceed 1.5 mm. Such a construction is described in patent CH 610 178. In this movement, the barrel is pivoted, in the thickness of the movement, by its periphery using three rollers each pivoted on a miniature ball bearing and the ratchet is pivoted on the barrel axis. We tried to further reduce the thickness of the movement. However, such a reduction is inevitably accompanied by a reduction in the width of the mainspring housed in the barrel, that is to say a reduction in the energy available when the spring is armed, that is, a decrease in the power reserve of the watch. It is certainly possible to compensate for this reduction in energy by using two barrels as taught in patent CH 375 289, but with such small dimensions of motor spring, the importance of friction and energy losses which the result is growing.

Or, si l'on considère la conception du barillet selon l'art antérieur, on constate que le barillet est soumis à deux moments de torsion opposés, l'un dû au ressort et l'autre au rochet. Ces moments de torsion ne sont pas dans un même plan, ce qui a inévitablement pour effet d'engendrer une torsion dans un plan perpendiculaire ou oblique au plan de la platine du mouvement en raison du porte-à-faux. Le tambour du barillet ne peut toutefois se déplacer librement par rapport à son axe idéal en raison des galets qui l'entourent et le supportent, ce qui engendre des frottements qu'il est quasiment impossible de supprimer dans un tel pivotement.However, if we consider the design of the barrel according to the prior art, we see that the barrel is subjected to two opposite torsional moments, one due to the spring and the other to the ratchet. These torsional moments are not in the same plane, which inevitably has the effect of generating a torsion in a perpendicular plane or oblique to the plane of the movement plate due to the overhang. The drum of the barrel cannot however move freely relative to its ideal axis because of the rollers which surround it and support it, which generates friction which it is almost impossible to remove in such a pivoting.

La présente invention a pour but de supprimer ces frottements.The object of the present invention is to eliminate this friction.

Le mouvement de montre selon l'invention est caractérisé par le fait que le rochet est en forme de tambour entourant le tambour de barillet et pivoté par sa périphérie à l'aide d'au moins trois galets pivotés chacun sur un roulement à billes et que le barillet est pivoté dans le rochet.The watch movement according to the invention is characterized in that the ratchet is in the form of a drum surrounding the barrel drum and pivoted by its periphery using at least three rollers each pivoted on a ball bearing and that the barrel is pivoted in the ratchet.

Cette construction, qui se démarque totalement de la construction conventionnelle des barillets, permet de supprimer les frottements dont il a été question plus haut, puisque le tambour de barillet est libre de se déplacer sous l'effet de la torsion décrite plus haut.This construction, which is totally different from the conventional construction of barrels, makes it possible to eliminate the friction which has been mentioned above, since the barrel drum is free to move under the effect of the torsion described above.

Le rochet n'étant qu'un organe passif, immobile, les frottements qu'il peut rencontrer au niveau de ses galets de pivotement ne jouent qu'un rôle secondaire. Grâce au roulement à billes, ils sont cependant très faibles et sont négligeables dans le cas d'une exécution automatique à masse oscillante.The ratchet being only a passive, immobile member, the friction that it can meet at the level of its pivoting rollers play only a secondary role. Thanks to the ball bearing, they are however very low and are negligible in the case of an automatic oscillating mass execution.

De manière à maintenir les frottements aussi bas que possible, le barillet est de préférence pivoté dans le rochet au moyen d'un roulement à billes monté dans un moyeu du rochet.In order to keep the friction as low as possible, the barrel is preferably pivoted in the ratchet by means of a ball bearing mounted in a hub of the ratchet.

Le dessin annexé représente, à titre d'exemple, une forme d'exécution du mouvement de montre selon l'invention.

  • la figure 1 en représente une vue en plan schématique, et
  • la figure 2 représente une vue en coupe selon II-II de la figure 1.
The accompanying drawing shows, by way of example, an embodiment of the watch movement according to the invention.
  • FIG. 1 represents a schematic plan view thereof, and
  • FIG. 2 represents a sectional view along II-II of FIG. 1.

Le mouvement comprend, sur et dans une seul platine 1, deux barillets identiques 2 et 3 tournant en sens contraire et attaquant un renvoi commun 4 engrenant avec le pignon de centre 5. Le barillet 2 est associé au rouage de finissage comprenant successivement un pignon de finissage 6, la grande moyenne 7, la petite moyenne 8, la roue de seconde 2 et la roue d'échappement 10 pour aboutir au balancier 11. Le pignon de finissage 6 engrène avec le pignon 12 de la grande moyenne 7. On distingue encore la minuterie 13 et le mobile 14 du rouage de remontage manuel.The movement comprises, on and in a single plate 1, two identical barrels 2 and 3 rotating in opposite directions and attacking a common reference 4 meshing with the center pinion 5. The barrel 2 is associated with the gear train comprising successively a pinion of finishing 6, the large average 7, the small average 8, the second wheel 2 and the escape wheel 10 to reach the balance 11. The finishing pinion 6 meshes with the pinion 12 of the large medium 7. We can still distinguish the timer 13 and the mobile 14 of the manual winding train.

Tous les mobiles sont montés en porte-à-faux sur la platine au moyen de roulements à billes miniatures 15, 16, 17, 18, 19, 20, 21 comme représenté plus en détail dans le brevet CH 610 178.All the mobiles are cantilevered on the plate by means of miniature ball bearings 15, 16, 17, 18, 19, 20, 21 as shown in more detail in patent CH 610,178.

Les deux barillets sont réalisés de manière identique et l'on se contentera de décrire la réalisation du barillet 3. le tambour du barillet 3 est muni d'un axe 22 chassé dans la cage intérieure d'un roulement à billes 23 dont la cage extérieure est chassée dans le moyeu 24 d'un rochet 25 en forme de tambour, c'est-à-dire munie d'une couronne 26 entourant le tambour de barillet. Le rochet 25 présente extérieurement une gorge périphérique 27 dans laquelle s'engagent les tranches de galets pivotés sur la platine au moyen d'un roulement à bille et assurant le pivotement du rochet 25 par sa périphérie. De tels galets sont représentés en détail dans le brevet CH 610 178. Ils sont représentés schématiquement à la figure 1 en 28, 29, 30, 31, 32. Chacun des rochets 25 et 33 est donc pivoté au moyen de trois galets, le galet 30 étant commun aux deux rochets.The two barrels are produced in an identical manner and it will be sufficient to describe the construction of the barrel 3. the drum of the barrel 3 is provided with a pin 22 driven into the inner cage of a ball bearing 23 whose outer cage is driven into the hub 24 of a ratchet 25 in the form of a drum, that is to say provided with a crown 26 surrounding the barrel drum. The ratchet 25 has externally a peripheral groove 27 in which engage the slices of rollers pivoted on the plate by means of a ball bearing and ensuring the pivoting of the ratchet 25 by its periphery. Such rollers are shown in detail in patent CH 610 178. They are shown schematically in Figure 1 at 28, 29, 30, 31, 32. Each of the ratchets 25 and 33 is therefore pivoted by means of three rollers, the roller 30 being common to the two ratchets.

Le moyeu 24 du rochet constitue donc la bonde du barillet et il est muni d'un crochet 34 pour le ressort de barillet. Les tambours de barillet 2 et 3 sont donc pivotés uniquement par leur centre dans un roulement à billes réduisant les frottements au minimum.The hub 24 of the ratchet therefore constitutes the bung of the barrel and it is provided with a hook 34 for the barrel spring. The barrel drums 2 and 3 are therefore pivoted only by their center in a ball bearing reducing friction to a minimum.

A la figure 1 on reconnait en outre la chaussée 35 et la roue à canon 36.In FIG. 1, we also recognize the carriageway 35 and the barrel wheel 36.

La nouvelle conception des barillets est bien entendu applicable à un mouvement ne comportant qu'un seul barillet.The new barrel design is of course applicable to a movement comprising only one barrel.

Le mouvement décrit pourrait être équipé d'une masse oscillante pour en faire un mouvement à remontage automatique.The movement described could be equipped with an oscillating weight to make it an automatic movement.

Claims (3)

  1. Extra-thin watch movement with manual or automatic winding comprising at least one barrel (2, 3) and in which all the wheel sets are assembled in cantilever on one sole base plate (1) and each with the help of one ball bearing (15 to 21) only, characterized in that the ratchet (25) is in the form of a drum surrounding the barrel drum (3) and swivelled by its periphery with the help of at least three rollers (28 to 32), each pivoted on a ball bearing, and in that the barrel (3) is pivoted within the ratchet.
  2. Watch movement according to claim 1, characterized in that the ratchet exhibits a hub (24) within which the barrel is pivoted by means of a ball bearing (23).
  3. Watch movement according to claim 1 or 2, characterized in that it comprises two barrels (2, 3) the ratchets (25, 33) of which are swivelled by five rollers (28 to 32), one (30) of which is common to both ratchets.
EP93108400A 1992-06-06 1993-05-25 Extra-flat clockwork-movement Expired - Lifetime EP0573839B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1818/92 1992-06-06
CH1818/92A CH682871B5 (en) 1992-06-06 1992-06-06 extra flat watch movement.

Publications (2)

Publication Number Publication Date
EP0573839A1 EP0573839A1 (en) 1993-12-15
EP0573839B1 true EP0573839B1 (en) 1996-04-24

Family

ID=4219317

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108400A Expired - Lifetime EP0573839B1 (en) 1992-06-06 1993-05-25 Extra-flat clockwork-movement

Country Status (5)

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US (1) US5278807A (en)
EP (1) EP0573839B1 (en)
JP (1) JP3282051B2 (en)
CH (1) CH682871B5 (en)
DE (1) DE69302325T2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1243984B1 (en) * 2001-03-21 2008-12-24 CHRONOSWISS UHREN GmbH Clockwork
EP1333345B1 (en) * 2002-02-01 2008-03-26 TAG Heuer SA Device having clockwork-movement and chronograph module
CH705048B1 (en) 2002-07-09 2012-12-14 Lvmh Swiss Mft Sa A drive by smooth or notched belts a mechanical watch movement.
DE602004016282D1 (en) * 2004-04-01 2008-10-16 Richemont Int Sa Movement with several barrels
CH702035B1 (en) * 2006-10-20 2011-04-29 Eterna Sa Fabrique D Horlogerie Timepiece.
CH702994B1 (en) * 2010-04-26 2015-07-31 Eterna Sa Fabrique D Horlogerie Timepiece comprising a barrel mounted on a barrel bridge.
US9298162B2 (en) * 2010-10-01 2016-03-29 Rolex Sa Timepiece barrel with thin disks
EP2466397B1 (en) * 2010-12-20 2013-08-21 Blancpain S.A. Rotating clock component with peripheral guide
CH713937A2 (en) * 2017-06-22 2018-12-28 Eta Sa Mft Horlogere Suisse Modular mechanical part with a ball bearing.
JP6730538B1 (en) * 2020-01-29 2020-07-29 セイコーウオッチ株式会社 Wheel train mechanism, movement and clock

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR341577A (en) * 1903-05-30 1904-08-11 Obrecht Et Cie Simplified "roskopf" watch
CH375289A (en) * 1960-06-14 1963-10-31 Holding Favre Leuba S A Watch including two motor barrels
CH582371B5 (en) * 1973-05-11 1976-11-30 Ebauches Bettlach Sa
JPS5542355B2 (en) * 1973-09-28 1980-10-30
CH599580B5 (en) * 1974-08-22 1978-05-31 Longines Montres Comp D
IT1074807B (en) * 1976-02-18 1985-04-20 Bouchet Lassale Sa WATERPROOFING DEVICE FOR CLOCK BARREL
CH610178B (en) * 1976-02-18 Bouchet Lassale Sa WATCH MOVEMENT.
CH676185B5 (en) * 1989-06-01 1991-06-28 Piguet Frederic Sa

Also Published As

Publication number Publication date
JP3282051B2 (en) 2002-05-13
DE69302325D1 (en) 1996-05-30
DE69302325T2 (en) 1997-02-13
EP0573839A1 (en) 1993-12-15
US5278807A (en) 1994-01-11
CH682871B5 (en) 1994-06-15
CH682871GA3 (en) 1993-12-15
JPH0651076A (en) 1994-02-25

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