EP1513028B1 - Winding crown for mechanical timepiece - Google Patents

Winding crown for mechanical timepiece Download PDF

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Publication number
EP1513028B1
EP1513028B1 EP20040005384 EP04005384A EP1513028B1 EP 1513028 B1 EP1513028 B1 EP 1513028B1 EP 20040005384 EP20040005384 EP 20040005384 EP 04005384 A EP04005384 A EP 04005384A EP 1513028 B1 EP1513028 B1 EP 1513028B1
Authority
EP
European Patent Office
Prior art keywords
crown
winding
ring
winding crown
timepiece
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
EP20040005384
Other languages
German (de)
French (fr)
Other versions
EP1513028A3 (en
EP1513028A2 (en
Inventor
Pascal Cavicchiolo
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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Filing date
Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Publication of EP1513028A2 publication Critical patent/EP1513028A2/en
Publication of EP1513028A3 publication Critical patent/EP1513028A3/en
Application granted granted Critical
Publication of EP1513028B1 publication Critical patent/EP1513028B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/06—Keys or the like with means preventing overwinding
    • 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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/04—Rigidly-mounted keys, knobs or crowns
    • G04B3/041—Construction of crowns for rotating movement; connection with the winding stem; winding stems
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/10—Hermetic sealing of openings, joints, passages or slits of winding stems

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

Description

La présente invention concerne une couronne de remontage pour pièce d'horlogerie mécanique, plus particulièrement une couronne de remontage comprenant un dispositif de limitation de couple pour empêcher que des parties de la pièce d'horlogerie telles que le ressort moteur, la tige de remontage, les rouages, etc. se cassent lorsque l'utilisateur continue de tourner la couronne après que le ressort moteur a été complètement remonté.The present invention relates to a winding crown for a mechanical timepiece, more particularly to a winding crown comprising a torque limiting device for preventing parts of the timepiece such as the mainspring, the winding rod, the wheels, etc. break when the user continues to turn the crown after the mainspring has been fully raised.

On connaît par le document US 352.257 une couronne de remontage de montre comprenant une première roue de friction solidaire de l'enveloppe de la couronne et maintenue par un ressort axial contre une seconde roue solidaire de la tige de remontage. Lors du remontage de la montre, la seconde roue est entraînée par la première roue jusqu'à un certain seuil au-delà duquel la première roue ne peut plus vaincre la résistance de la seconde roue et se met à glisser sur cette dernière, évitant ainsi que le ressort moteur et d'autres parties de la montre soient soumis à des contraintes trop importantes. Du fait de la présence du ressort axial, qui doit avoir une force suffisante, cette couronne présente nécessairement une grande hauteur.We know from the document US 352,257 a watch winding crown comprising a first friction wheel secured to the casing of the ring and held by an axial spring against a second wheel secured to the winding rod. When reassembling the watch, the second wheel is driven by the first wheel to a certain threshold beyond which the first wheel can no longer overcome the resistance of the second wheel and begins to slide on the latter, thus avoiding that the mainspring and other parts of the watch are subjected to excessive stresses. Due to the presence of the axial spring, which must have sufficient strength, this ring necessarily has a high height.

On connaît également par le document FR 917.982 une couronne de remontage comportant un disque de friction élastique entraînant jusqu'à un certain seuil de remontage du ressort moteur un plateau solidaire de la tige de remontage. Cette couronne peut certes avoir une faible hauteur mais, pour que le ressort à lame que constitue le disque de friction élastique ait une sensibilité suffisante, la dimension radiale de celui-à, et donc de la couronne, doit être relativement importante.It is also known from the document FR 917.982 a winding crown comprising an elastic friction disk driving up to a certain winding threshold of the motor spring a fixed plate of the winding rod. This crown may certainly have a low height but, so that the leaf spring that constitutes the elastic friction disk has a sufficient sensitivity, the radial dimension of it-to, and therefore the crown, must be relatively large.

On connaît également par le document CH 274 344 un mécanisme de remontage pour réveil dans lequel l'organe de remontage comprend des moyens de friction élastiques constitués par deux ressorts cylindriques opposés s'étendant radialement par rapport à la tige de remontage. Au vu de l'agencement et du nombre des ressorts cylindriques, pour que lesdits ressorts aient une sensibilité suffisante, leur dimension doit être relativement importante et donc la dimension radiale de l'organe de remontage doit être relativement importante.It is also known from the document CH 274 344 a waking winding mechanism in which the winding member comprises elastic friction means constituted by two opposed cylindrical springs extending radially relative to the winding rod. In view of the layout and number of cylindrical springs, so that said springs have a sufficient sensitivity, their size must be relatively large and therefore the radial dimension of the winding member must be relatively large.

La présente invention vise à remédier aux inconvénients précités et propose, pour ce faire, une couronne de remontage selon la revendication 1 annexée, des modes de réalisation particuliers étant définis dans les revendications dépendantes, ainsi qu'une pièce d'horlogerie l'incorporant.The present invention aims to remedy the aforementioned drawbacks and proposes, for this purpose, a winding crown according to the appended claim 1, particular embodiments being defined in the dependent claims, as well as a timepiece incorporating it.

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 coupe axiale de la couronne de remontage selon l'invention ;
  • la figure 2 est une vue de dessus d'une bague d'entraînement incluse dans la couronne de remontage selon l'invention ; et
  • la figure 3 est une vue de dessous d'une pièce entraînée incluse dans la couronne de remontage 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 an axial sectional view of the winding crown according to the invention;
  • the figure 2 is a top view of a drive ring included in the winding crown according to the invention; and
  • the figure 3 is a bottom view of a driven part included in the winding crown according to the invention.

En référence aux figures 1 à 3, une couronne de remontage selon l'invention pour une pièce d'horlogerie, typiquement une montre-bracelet, mécanique comprend une coiffe 1 et, montés dans la coiffe 1 coaxialement à celle-ci, une pièce d'entraînement 2 et une pièce entraînée 3.With reference to Figures 1 to 3 , a winding crown according to the invention for a timepiece, typically a wristwatch, mechanical comprises a cap 1 and, mounted in the cap 1 coaxially thereto, a driving part 2 and a driven part 3.

La pièce d'entraînement 2 est une bague chassée dans la coiffe 1 et donc solidaire de cette dernière. La pièce entraînée 3 est constituée d'un plateau 30 transversal, c'est-à-dire perpendiculaire à l'axe 4 de la couronne, et d'un élément de fixation central 32 formé d'un seul tenant avec le plateau 30 et faisant saillie axialement depuis la face inférieure 34 du plateau 30 tournée vers la carrure 5 de la pièce d'horlogerie. L'élément de fixation central 32 présente un alésage taraudé axial 36 apte à recevoir une extrémité filetée correspondante de la tige de remontage (non représentée) de la pièce d'horlogerie pour rendre le plateau 30 solidaire de cette tige de remontage et lui permettre ainsi de commander la torsion du ressort moteur.The drive part 2 is a ring driven into the cap 1 and therefore integral with the latter. The driven part 3 consists of a transverse plate, that is to say perpendicular to the axis 4 of the ring, and a central fastening element 32 formed in one piece with the plate 30 and projecting axially from the lower face 34 of the plate 30 facing the middle part 5 of the timepiece. The central fastening element 32 has an axial threaded bore 36 adapted to receive a corresponding threaded end of the winding rod (not shown) of the timepiece to make the plate 30 integral with this winding rod and thus allow it to control the torsion of the mainspring.

La bague 2 comprend des cavités 20, au nombre de huit dans l'exemple illustré, régulièrement réparties autour de l'axe 4 de la couronne et logeant chacune un ressort de compression à boudin 22 et un organe de friction associé 24. Chaque organe de friction 24 est sous la forme d'un téton ou bille d'encliquetage poussé parallèlement à l'axe 4 par son ressort respectif 22 contre la face inférieure 34 du plateau 30, et coopère avec une alvéole correspondante 38 formée dans ladite face inférieure 34. Tant qu'un seuil de tension prédéterminé du ressort moteur n'a pas été atteint, les ressorts 22 maintiennent les organes de friction 24 dans les alvéoles respectives 38 lors du remontage, de sorte que le couple de rotation de la bague 2 est transmis au plateau 30. Dès que le seuil précité est atteint, les organes de friction 24 s'effacent dans les cavités respectives 20, la force des ressorts 22 n'étant plus suffisante pour vaincre la résistance du plateau 30, et se mettent à glisser sur la face inférieure 34 du plateau 30, lequel n'est alors plus entraîné. Cette limitation du couple appliqué au plateau 30 permet d'éviter que certaines parties de la pièce d'horlogerie, en particulier le ressort moteur, la tige de remontage et les rouages, soient soumises à des contraintes trop importantes. Lors de leur glissement sur le plateau 30, les organes de friction 24 produisent à chaque passage dans une alvéole 38 un « clic » indiquant à l'utilisateur que le ressort moteur est complètement remonté.The ring 2 comprises cavities 20, eight in number in the example shown, regularly distributed around the axis 4 of the ring and each housing a coil compression spring 22 and an associated friction member 24. Each member friction 24 is in the form of a pin or snap ball pushed parallel to the axis 4 by its respective spring 22 against the lower face 34 of the plate 30, and cooperates with a corresponding cell 38 As long as a predetermined tension threshold of the mainspring has not been reached, the springs 22 hold the friction members 24 in the respective cells 38 during reassembly, so that the torque rotation of the ring 2 is transmitted to the plate 30. As soon as the above threshold is reached, the friction members 24 are erased in the respective cavities 20, the force of the springs 22 no longer being sufficient to overcome the resistance of the plate 30 , and begin to slide on the lower face 34 of the plate 30, which is then no longer driven. This limitation of the torque applied to the plate 30 makes it possible to prevent certain parts of the timepiece, in particular the mainspring, the winding rod and the wheels, from being subjected to excessive stresses. During their sliding on the plate 30, the friction members 24 produce at each passage in a cell 38 a "click" indicating to the user that the mainspring is completely reassembled.

La couronne de remontage selon l'invention est rendue étanche par des premier et second joints toriques 6, 7 maintenus dans des logements respectifs 8, 9 formés dans la bague 2. Le premier joint torique 6 assure l'étanchéité entre la bague 2 et un tube de couronne 10 chassé dans la carrure 5 de la pièce d'horlogerie et entourant la tige de remontage. Le second joint torique 7 assure l'étanchéité entre la bague 2 et la coiffe 1.The winding crown according to the invention is sealed by first and second O-rings 6, 7 held in respective housings 8, 9 formed in the ring 2. The first O-ring 6 seals between the ring 2 and a ring. crown tube 10 driven into the middle 5 of the timepiece and surrounding the winding rod. The second O-ring 7 seals between the ring 2 and the cap 1.

La couronne de remontage selon l'invention présente plusieurs avantages par rapport aux couronnes à dispositif de limitation de couple conventionnelles. En particulier, grâce à l'utilisation de plusieurs ressorts associés respectivement à plusieurs organes de friction, la force et donc les dimensions de chaque ressort peuvent être relativement faibles ce qui permet de réduire l'encombrement axial et radial de la couronne. D'autre part, par la disposition relative de la bague 2 et de la pièce entraînée 3, cette couronne de remontage peut être facilement rendue étanche, de la manière indiquée précédemment.The winding crown according to the invention has several advantages over conventional torque limiting crowns. In particular, thanks to the use of several springs associated respectively with several friction members, the force and therefore the dimensions of each spring can be relatively low which reduces the axial and radial size of the ring. On the other hand, by the relative disposition of the ring 2 and the driven part 3, this winding crown can be easily sealed, as previously indicated.

La présente invention, qui est définie par les revendications annexées, a été décrite ci-dessus à titre d'exemple uniquement. Il va de soi que des modifications peuvent être faites sans sortir du cadre de l'invention revendiquée. Dans une variante de réalisation, notamment, on pourrait inverser les fonctions de la bague et du plateau pour que le plateau constitue l'élément d'entraînement solidaire de la coiffe et la bague constitue l'élément entraîné solidaire de la tige de remontage.The present invention, which is defined by the appended claims, has been described above by way of example only. It goes without saying that modifications can be made without departing from the claimed invention. In an alternative embodiment, in particular, one could reverse the functions of the ring and the plate so that the plate is the drive element integral with the cap and the ring is the driven integral element of the winding rod.

Claims (10)

  1. Winding crown for a mechanical timepiece, comprising a torque-limiting device, said torque-limiting device comprising a first element (2) and a second element (30) which are intended to serve as a drive element and a driven element, the driven element being arranged to control the torsion of the mainspring of the timepiece, the first element (2) comprising several cavities (20) each housing a spring (22) and an associated friction member (24), characterised in that each friction member (24) is arranged to be urged by its respective spring (22) against the second element (30) in parallel with the rotational axis (4) of the crown.
  2. Winding crown as claimed in Claim 1, characterised in that the cavities (20) are evenly distributed around the rotational axis (4) of the crown.
  3. Winding crown as claimed in Claim 1 or 2, characterised in that the friction members (24) are detent elements co-operating with corresponding pockets (38) formed in the second element (30).
  4. Winding crown as claimed in any one of Claims 1 to 3, characterised in that the springs (22) are helical springs.
  5. Winding crown as claimed in any one of Claims 1 to 4, characterised in that the first element (2) is a drive ring and the second element (30) is a driven plate (30) coaxial to the ring (2).
  6. Winding crown as claimed in Claim 5, characterised in that it further comprises a cover (1) within which are mounted the ring (2) and the plate (30), these latter elements being coaxial to the cover (1), in that the ring (2) is fixedly attached to the cover (1), and in that a fixing element (32) extending axially from the plate (30) allows the plate (30) to be made fixedly attached to a winding rod of the timepiece.
  7. Winding crown as claimed in Claim 6, characterised in that it further comprises a seal (7) between the ring (2) and the cover (1).
  8. Mechanical timepiece comprising a winding crown as claimed in any one of Claims 1 to 7.
  9. Mechanical timepiece as claimed in Claim 8, characterised in that the winding crown is sealed.
  10. Mechanical timepiece as claimed in Claim 8, characterised in that a seal (6) is provided between the first element (2) of the winding crown and a crown tube (10) fixed to the case middle (5) of the timepiece.
EP20040005384 2003-09-01 2004-03-06 Winding crown for mechanical timepiece Expired - Lifetime EP1513028B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14942003A CH696823A5 (en) 2003-09-01 2003-09-01 winding crown for mechanical timepiece.
CH14942003 2003-09-01

Publications (3)

Publication Number Publication Date
EP1513028A2 EP1513028A2 (en) 2005-03-09
EP1513028A3 EP1513028A3 (en) 2010-05-19
EP1513028B1 true EP1513028B1 (en) 2012-08-01

Family

ID=34120762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040005384 Expired - Lifetime EP1513028B1 (en) 2003-09-01 2004-03-06 Winding crown for mechanical timepiece

Country Status (4)

Country Link
EP (1) EP1513028B1 (en)
CH (1) CH696823A5 (en)
DE (1) DE04005384T1 (en)
HK (1) HK1070699A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH697270B1 (en) * 2004-01-28 2008-07-31 Richemont Int Sa A winder.
EP3828641B1 (en) 2019-11-29 2022-07-20 Meco S.A. Push-crown for a timepiece

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US352257A (en) 1886-11-09 Teeeitoey
US2311230A (en) * 1942-04-07 1943-02-16 Hill Charles Spring winding device
FR917982A (en) 1944-11-27 1947-01-27 Fiexible winding device applicable in particular to small watches
US2571879A (en) * 1946-07-25 1951-10-16 Hil Jon Safety Crown Corp Overload release coupling
CH274344A (en) * 1949-02-04 1951-03-31 Weis August Winding device for the mainspring of spring drives with winding shaft.
US2927420A (en) * 1958-04-21 1960-03-08 Hil Jon Safety Crown Corp Waterproof watch winding means

Also Published As

Publication number Publication date
EP1513028A3 (en) 2010-05-19
CH696823A5 (en) 2007-12-14
DE04005384T1 (en) 2005-08-18
EP1513028A2 (en) 2005-03-09
HK1070699A1 (en) 2005-06-24

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