EP3291026B1 - Stossdämpfer-gleitlager für eine uhr - Google Patents

Stossdämpfer-gleitlager für eine uhr Download PDF

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Publication number
EP3291026B1
EP3291026B1 EP16186261.0A EP16186261A EP3291026B1 EP 3291026 B1 EP3291026 B1 EP 3291026B1 EP 16186261 A EP16186261 A EP 16186261A EP 3291026 B1 EP3291026 B1 EP 3291026B1
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EP
European Patent Office
Prior art keywords
spring
shock
extensions
ring
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.)
Active
Application number
EP16186261.0A
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English (en)
French (fr)
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EP3291026A1 (de
Inventor
Christian Rüfenacht
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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.)
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Publication date
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP16186261.0A priority Critical patent/EP3291026B1/de
Priority to CN201721029367.1U priority patent/CN207133591U/zh
Publication of EP3291026A1 publication Critical patent/EP3291026A1/de
Application granted granted Critical
Publication of EP3291026B1 publication Critical patent/EP3291026B1/de
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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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings
    • G04B31/04—Shock-damping bearings with jewel hole and cap jewel

Definitions

  • the present invention relates to a shock-absorbing bearing for a timepiece, and more particularly the bearing of the balance axis of a mechanical watch, making it possible to avoid the rupture of the small diameter pivot, located at its end, designated by “tigeron”, in the event of an axial or lateral impact, which may simply result from a sudden movement of the wearer's wrist.
  • FIGS 1 to 3 illustrate a device, called "double inverted cone" which is currently used in timepieces on the market.
  • a device of this type is for example described in the patent FR 1,532,798 .
  • a support block 1 the base of which has a hole 2 for the passage of the pendulum axis 3 terminated by a tigeron 3a, makes it possible to position a kitten 20 in which are immobilized a pierced stone 4 crossed by the tigeron 3a and a stone counter-pivot 5.
  • the kitten 20 is held in a housing 6 of the support block 1 by a spring 10 which in this example comprises radial extensions 9 compressing the stone against-pivot 5.
  • the housing 6 has two bearing surfaces 7, 7a in the form of inverted cones on which are supported complementary bearing surfaces 8, 8a of the kitten 20, said bearing surfaces having to be executed with very high precision.
  • the spring 10 acts alone to bring the balance pin 3 back to its initial position.
  • the support block 1 comprises a peripheral rim 11 in which two diametrically opposed openings 11a are made.
  • the current spring is a substantially flat lyre spring 10.
  • a substantially flat lyre spring 10 Such a spring comprises a base from which two arms extend. These curved arms are symmetrical and extend to give a lyre shape. Ideally, the arms are arranged to form two parts of the same circle whose center is the center of the moving spring. Each arm comprises, at its free end, a hook making it possible to bear on projecting portions 11b of the rim extending at the level of the openings.
  • the radial extensions 9 of the spring extend from the inside of the arms.
  • each arm of the spring is arranged to be curved in order to form an extension.
  • the extension to a shape of an arc of a circle whose interface with the extension is made by the concave face of said support head 9 '.
  • the present invention therefore aims to overcome the drawbacks of the aforementioned prior art by providing a shock absorbing bearing comprising a pierced stone and a counter-pivot stone assembled in a kitten suspended by a moving spring allowing a more progressive response to shocks.
  • the invention relates to a shock absorbing bearing according to claim 1.
  • the spring is formed of a curved strip in order to produce internal radial extensions arranged between annular parts, said internal radial extensions carrying the support head.
  • the spring includes three regularly distributed extensions.
  • the bearing comprises a support block 1 of circular shape delimiting a housing 6 whose center is pierced with a hole 2 to allow the passage of a pendulum axis 200 terminated by a tigeron 202.
  • the support block 1 can either be an independent part driven out or fixed by any other means in the frame of the watch movement, or be part of another part of the movement, such as a bridge or a plate.
  • the kitten 20 which supports the pierced stone 4 traversed by the tigeron 3a and the counter-pivot stone 5 is damped by a spring 12.
  • the support block 1 comprises a peripheral rim 9 having two openings 10. These openings 10 are diametrically opposite and allowing the positioning of the spring 12.
  • the peripheral rim 9 comprises projecting portions 11 extending at the level openings. More specifically, the two openings 10 making it possible to have a peripheral rim 9 in two identical parts. Each part comprises, at each end, a projecting portion 11 extending towards the center of the opening. These projecting portions 11 allow the spring 12 to bear thereon.
  • the spring 12 is an annular spring.
  • the spring 12 is a lyre spring.
  • a spring 12 consists of two arms 12a in the form of an arc of a circle linked together, via a crosspiece 12b, at one of their ends, the whole forming a form of peripheral ring 12 '.
  • This spring 12 thus has two free ends each comprising a support zone 12c.
  • Such a support area 12c can be in the form of a curvature of each arm at its free end in order to widen the area.
  • This configuration of the spring allows it to be installed in the housing 6 of the support block. Indeed, once the kitten 20 is in place, the spring 12 is installed.
  • the spring 12 is installed so as to press the kitten into the housing while having the cross member 12b and the bearing zones 12c pressed against the projecting portions 11 of the peripheral rim.
  • the spring 12 comprises at least one extension 13.
  • This extension 13 extends from one of the arms 12a of the spring towards its center. This extension made of material with the spring 12 is used to exert a prestress on the counter-pivot stone and to bring the kitten back into the housing during an impact.
  • the spring 12 is dimensioned so that only the extension is in contact with the counter-pivot stone.
  • the arms 12a in the form of an arc of a circle are formed to have the same center and to form substantially a circle with a center C. This center C also becomes the center of the spring.
  • the extension comprises, at its free end, a support head 14 made of material with the extension.
  • This support head 14 has the shape of an arc of a circle whose interface with the extension 13 is made via the convex face of said arc of a circle.
  • Each support head has an arc shape having a greater curvature than that of the arms forming the spring.
  • the radius of the circular arc forming the support head is therefore greater than if this circular arc had a radius whose center was the center C of the spring. It is therefore understood that the center C 'of the arc of a circle of each arm is offset with the center C of the spring as visible on the figure 7 .
  • the extension with its support head 14 therefore has a shape similar to a Tee.
  • This design makes it possible to obtain a tee-shaped extension 13 whose arms have better contact with the stone against the pivot.
  • the support head 14 of the extension 13 advantageously has a reverse curvature compared to that of the prior art described above. This allows to force contact with the stone "against pivot" in the ends since the support head has a shape tending to follow the shape of the stone against pivot.
  • An advantage of this configuration is to have several contact points. Indeed, the shape of the support head 14 allows it to be, at rest, in contact with the counter-pivot stone 5 in two places E1 and E2. This increase in the number of contact points allows better stability of the support on the counter-pivot stone 5.
  • the central area of the support head 14 is the most rigid part so that the deformation of this part 14 is less easy. Consequently, the greater the impact, the more the contact between the extension 13 of the spring 12 and the counter-pivot stone 5 is made on the most rigid zone of said extension. This thus provides better damping during large shocks.
  • This configuration of spring 12 also makes it possible to have a better view of the lubricant.
  • the lubricant is arranged between the pierced stone and the counter-pivot stone.
  • the view on the center of the counter-pivot stone is released and defined. This is possible due to the shape of the support head or heads which tend to delimit an area. With an arc shape whose interface with the extension is through the concave face, the spring extensions must be longer and the support heads offer a visual not delimiting an area and blocking the view on the lubricant.
  • each extension thus has its center C '.
  • the spring 12 is a spring ring 120.
  • a spring ring 301 comprises internal radial extensions 121 arranged between annular parts 122. These internal radial extensions 121 are formed by the band forming the ring 120 which is bent inwards of the ring the whole forming a form of peripheral ring 12 '. These internal radial extensions 121 are preferably regularly distributed around the turn of the flat ring 120 so that the latter can act in a homogeneous manner. These internal radial extensions 121 each comprise the support head 14 according to the invention. It is then understood that the spring ring 120 can be oriented in any way relative to the support block 1.
  • This support block 1 also includes a peripheral rim provided with a peripheral projecting portion extending towards the interior of the block support.
  • the peripheral projecting portion may include a notch allowing the spring ring 120 to be put in place, said peripheral projecting portion serving to retain the spring ring in place.
  • the spring ring may include three internal radial extensions.
  • the peripheral projecting portion may include three notches allowing the positioning of the spring ring via a bayonet insertion, said extension serving to retain the spring ring in place.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Vibration Dampers (AREA)

Claims (7)

  1. Shock-Absorber-Lager für einen Tigeron (3a) einer Welle (3) eines Uhrendrehteils mit einem Trägerblock (1), der dazu bestimmt ist, in das Gestell der Uhr eingepresst, in ihm befestigt oder geformt zu werden, wobei der Trägerblock (1) mit einer Lagerung (6) versehen ist zum Aufnehmen einer Feder (12) mit axialer Verformung und eines Futters (20), das einen vom Tigeron (3a) durchquerten Lochstein (4) und einen Deckstein (5) trägt, wobei die Feder (12) in der Lagerung (6) angeordnet ist zwischen dem Futter und mindestens einem vorstehenden Abschnitt am Umfangsrand des Trägerblocks, und die Feder (12) gebildet wird aus einem Umfangsring (12'), von dem aus sich mindestens eine Verlängerung (13, 121) erstreckt mit einem Stützkopf (14), der in Kontakt mit dem Deckstein ist, wobei dieser Stützkopf eine Kreisbogenform aufweist mit einer Grenzfläche zur Verlängerung, die zu ihrer konvexen Fläche passt, dadurch gekennzeichnet, dass die Feder ein Federring (120) ist mit drei inneren radialen Verlängerungen (121) zwischen den Ringteilen (122), wobei diese drei inneren radialen Verlängerungen (121) durch das Band gebildet werden, das den Ring (120) bildet, der zur Innenseite des Rings hin gekrümmt ist und das Ganze die Form eines Umfangsrings (12') bildet, wobei die inneren radialen Verlängerungen (121) je einen Stützkopf (14) aufweisen und gleichmäßig auf dem Umfang des Rings (120) verteilt sind, so dass dieser homogen wirken kann.
  2. Shock-Absorber-Lager nach Anspruch 1, dadurch gekennzeichnet, dass die Feder zwei Arme (12a) in Kreisbogenform aufweist, miteinander verbunden über eine Traverse (12b) und mit zwei freien Enden, die jeweils einen Stützbereich (12c) umfassen, wobei sich die mindestens eine Verlängerung von einem der beiden Arme (12a) aus erstreckt.
  3. Shock-Absorber-Lager nach Anspruch 2, dadurch gekennzeichnet, dass der Stützkopf (14) eine Krümmung größer als die der Arme (12a) aufweist.
  4. Shock-Absorber-Lager nach Anspruch 1, dadurch gekennzeichnet, dass die Feder aus einem gekrümmten Band gebildet ist, um innere radiale Verlängerungen (121), die zwischen den Ringteilen (122) angeordnet sind, zu bilden, wobei diese inneren radialen Verlängerungen (121) die Stützköpfe tragen.
  5. Shock-Absorber-Lager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Feder zwei diametral gegenüberliegende Verlängerungen aufweist.
  6. Shock-Absorber-Lager nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Feder drei Verlängerungen aufweist.
  7. Shock-Absorber-Lager nach Anspruch 6, dadurch gekennzeichnet, dass die drei Verlängerungen gleichmäßig verteilt sind.
EP16186261.0A 2016-08-30 2016-08-30 Stossdämpfer-gleitlager für eine uhr Active EP3291026B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16186261.0A EP3291026B1 (de) 2016-08-30 2016-08-30 Stossdämpfer-gleitlager für eine uhr
CN201721029367.1U CN207133591U (zh) 2016-08-30 2017-08-17 用于钟表件的减震器轴承

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16186261.0A EP3291026B1 (de) 2016-08-30 2016-08-30 Stossdämpfer-gleitlager für eine uhr

Publications (2)

Publication Number Publication Date
EP3291026A1 EP3291026A1 (de) 2018-03-07
EP3291026B1 true EP3291026B1 (de) 2020-01-01

Family

ID=56842737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16186261.0A Active EP3291026B1 (de) 2016-08-30 2016-08-30 Stossdämpfer-gleitlager für eine uhr

Country Status (2)

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EP (1) EP3291026B1 (de)
CN (1) CN207133591U (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3671368B1 (de) 2018-12-20 2022-11-23 The Swatch Group Research and Development Ltd Lager, insbesondere zur stossdämpfung, und drehteil eines uhrwerks

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH208022A (fr) * 1938-10-13 1939-12-31 Colomb Henri Palier amortisseur de chocs.
CH257780A (fr) * 1945-05-02 1948-10-31 Widmer Steiner Jean Dispositif pour la fixation élastique d'un palier, notamment d'un palier pour axe de balancier de montre.
FR1007329A (fr) * 1949-12-17 1952-05-05 Perfectionnement aux mécanismes d'horlogerie et mécanismes analogues
CH294057A (fr) * 1950-10-19 1953-10-31 Parechoc Sa Dispositif de montage d'un contre-pivot d'axe d'horlogerie sur son support.
CH325895A (fr) * 1955-06-25 1957-11-30 Seitz & Co Palier pare-chocs
CH335173A (fr) * 1957-01-28 1958-12-31 Schwartzmann Marcel Auguste An Palier amortisseur de chocs pour mobile d'horlogerie
FR1532798A (fr) 1967-07-21 1968-07-12 Palier amortisseur de chocs pour mobile d'horlogerie
JPS5226569U (de) * 1975-08-14 1977-02-24
DE602005006731D1 (de) * 2005-03-23 2008-06-26 Rolex Sa Stoßdämpfende Lagerung für Uhren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3291026A1 (de) 2018-03-07
CN207133591U (zh) 2018-03-23

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