EP2206022A1 - Palier amortisseur de chocs pour piece d'horlogerie - Google Patents
Palier amortisseur de chocs pour piece d'horlogerieInfo
- Publication number
- EP2206022A1 EP2206022A1 EP08847741A EP08847741A EP2206022A1 EP 2206022 A1 EP2206022 A1 EP 2206022A1 EP 08847741 A EP08847741 A EP 08847741A EP 08847741 A EP08847741 A EP 08847741A EP 2206022 A1 EP2206022 A1 EP 2206022A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stone
- pivot
- bearing according
- monolithic piece
- 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.)
- Granted
Links
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 bearing for timepieces and more particularly of the type for damping shocks.
- Such bearings are, most frequently, used to ensure the pivoting of the rockers. Indeed, these are provided with small diameter pivots, and therefore delicate. Since, moreover, the mass of the balance is relatively large, the risk is high that a pivot breaks under the effect of a shock.
- the bearings intended to ensure the pivoting of a rocker generally comprise two stones, a pierced stone, in which is engaged a pivot of the balance and a stone against pivot, which serves as support and limitation to the axial displacement of the pivot. These stones are made of a nonmetallic hard material such as corundum.
- shock absorbing bearings There are many types of shock absorbing bearings. The most frequently used include a body provided with positioning and sliding surfaces, a pierced stone and a counter-pivot stone together forming a pivot member, these stones being disposed in the body and positioned on the positioning and sliding surfaces. A spring maintains the stones in the rest position, while allowing them to move within a certain limit under the effect of a shock, the axis of the balance then arriving against stops.
- Such bearings have, for example, been sold under the trademark Incabloc ®.
- shock absorbing bearings in which the elastic members and the pivot members form a whole. They have the advantage of being less expensive.
- US 3,942,848 discloses a shock absorbing bearing comprising an annular body intended to be driven in a bridge or a plate.
- a spring formed to define a conical housing is attached to the body.
- This housing is a truss inside which a conical pivot of the balance comes to engage.
- pivoting conditions are unfavorable, metal-to-metal pivoting generating significant friction.
- a bearing type crapaudine cooperating with a conical pivot is poorly suited for a timepiece quality, the positioning of the balance is not very accurate.
- the EP 462'879 discloses shock absorbing bearings comprising a central part forming a pivot member and surrounded by a rosette formed in a plate of resilient rigid material.
- the rosette consists of springs extending radially, their central end cooperating with the central part.
- EP 1 '696'286 discloses a shock absorbing bearing comprising a pivot member provided with a pierced stone and a counter-pivot stone. Said bearing also comprises a fixing member whose purpose is to ensure the mounting of the bearing on a frame. It further comprises an elastic member which connects the pivot member to the fastener.
- the pierced stone, the counter-pivot stone and the elastic member are three distinct elements. The bearing will therefore be relatively difficult to assemble.
- a main object of the present invention is to provide a simplified structure shock absorbing bearing which can be manufactured largely by photolithography processes associated with either etching processes or material growth processes, while allowing lubrication of the pivoting.
- the shock absorbing bearing for a timepiece according to the invention comprises a pivot member provided with a pierced stone for receiving a pivot, and a counter-pivot stone forming a support of said pivot. It further comprises a fixing and abutment member for mounting on a frame and a resilient member connecting the pivot member to the fastener and comprising at least one arm.
- said elastic member and one of the two stones of the pivot member are constituted by a monolithic piece.
- the part is advantageously made of a monocrystalline material. Its manufacture is particularly well controlled when this material is silicon.
- a flat surface is easier to achieve a curved surface, it is more interesting that it is the counter-pivot stone which is constitutive of the monolithic piece.
- cleaning holes in the counter-pivot stone facilitate the cleaning of the bearing, which is necessary if the latter is lubricated. These holes are offset with respect to the balance shaft.
- the pierced stone on the monolithic part is rigidly attached to the monolithic part, preferably driven into a metal ring.
- the latter may be provided with two pins engaged in a hole made in said monolithic piece. These pins pass through said monolithic piece and are fixed thereto.
- the bearing may, in addition, comprise a fastener provided with two holes arranged so as to each receive one of said pins, in which they are fixed.
- pins and the metal ring can be formed in one piece.
- the pierced stone is fix the pierced stone directly on the monolithic piece.
- the latter is provided with a core in which is housed and fixed said pierced stone, for example by means of glue.
- the monolithic piece has a two-level structure and two elastic members, the counter-pivot stone and the first elastic member constituting the first level, the second elastic member the second level, the pierced stone being integral with said second elastic member.
- the bearing comprises a second monolithic piece in which is fixed said pierced stone.
- FIG. 3 shows a part intended to equip a bearing as shown in FIGS. 1 and 2
- FIG. 4 is a sectional view of a second variant of the first embodiment
- FIGS. 5 and 6 represent, seen in section
- Figures 7 and 8 illustrate a fourth variant of the first embodiment
- Figures 9 and 10 show, respectively seen in section and from above, a second embodiment
- FIGS. 11 and 12 are perspective views, from above and from below, of a part equipping the bearing of this embodiment
- FIG. 15 proposes a further variant of an embodiment.
- Figures 1 to 3 illustrate a watch movement portion provided with bearings according to the invention, respectively seen in section and from above.
- the movement comprises a frame comprising a plate 10 and a balance bridge 11, bearings 12 and 13 respectively mounted in holes 10a and 11a formed in the plate 10 and the bridge 11. These holes are coaxial, axis AA.
- a rocker 14 is pivotally mounted in the bearings 12 and 13. It comprises an axis 16 provided at its two ends with tigers 17, which carry pivots 18.
- the bearing 12 comprises a fixing member comprising two annular pieces 20 and 22, the piece 22, cup-shaped, being pierced at its center with a hole 23, a monolithic piece 24 of monocrystalline material, and a stone 26.
- the piece 24, shown from above in perspective in Figure 3, has a round and flat shape. It comprises a central portion 27, a peripheral portion 28, of annular shape, and spirally wound arms, forming an elastic member 29, which connect the central portion 27 to the peripheral portion 28.
- the central portion 27, disc is provided with a hole 27a in which is housed the pierced stone 26, fixed for example by gluing.
- the central portion 27 forms a counter-pivot stone 31 defined by the bottom of the core 27a.
- the counter-pivoting stone 31 constitutes, with the pierced stone 26, a pivoting member 32.
- the portion of the central portion 27 forming the counter pivot stone 31 is provided with holes 33 offset relative to the axis AA, facilitating thus the cleaning of the bearing.
- the monolithic piece 24 is interposed between the annular pieces 20 and 22.
- the piece 24, provided with the pierced stone 26, is disposed in the hole 10a of the plate 10, held radially by the wall of the hole 10a and axially by the annular parts 20 and 22.
- Such a structure makes it possible to adjust the axial position of the balance 14.
- the monolithic piece 24 is made in a silicon wafer using the well known methods of photolithography and etching.
- the dimensions of this part 24 are advantageously included within the following limits: diameter 1, 50 to 2.50 mm, typically 1.80 mm;
- the bearing 13 comprises a fixing and abutment member 34 consisting of an annular cup-shaped part, which defines a housing having an inner cylindrical wall 36 and a flat bearing surface 37 in the bottom of the cup. . It is also pierced with a central hole 23. A truncated portion of cone 38 forms the free end of the cup. It retains and positions a mobile bolt carrier 40.
- the bearing 13 also comprises a monolithic piece 24, provided with a pierced stone 26, in all respects similar to that fitted to the bearing 12.
- the piece 24, provided with the pierced stone 26, is fixed in the housing that form the cylindrical wall 36 and the bearing surface 37, advantageously by gluing. It could also be maintained axially similar to the bearing 12, by a ring driven on the cylindrical wall 36.
- the rocker 14 is pivotally mounted by engagement of the pivots 18 in the hole of the pierced stones 26.
- the tigers 17 are engaged in the holes 23.
- the balance 14 is subjected to a force proportional to the acceleration. This force is transmitted to the bearings 12 and 13 via the pivots 18 which bear in the hole of the pierced stones 26. It has the effect of deforming the arms of the elastic member 29 until the axis 16 come to bear, by the rods 17, against the wall of the holes 23. The rocker 14 is then blocked by a portion of its axis which has dimensions much larger than those pivots 18. The structure is thus more robust.
- one of the pivots 18 exerts a pressure on the counter-pivot stone 31, which has the effect of axially deforming the arms of the elastic member 29.
- the shaft 16 then bears against the plane wall adjacent to and surrounding the hole 23.
- the arms of the elastic member 29 are dimensioned so that the axis 16 comes into contact with the ring pieces 17 with the annular pieces 22. and 34 when the acceleration reaches about 500g, both for axial and radial impact.
- FIG. 4 Another variant of the first embodiment is shown in Figure 4. It includes the plate 10 and the bridge 11, the bearings 12 and 13 and the balance 14, with their component parts, which will not be described in new here.
- the pierced stone 26 is housed in a ring 42 of metal, for example brass or nickel-based alloy.
- the establishment of the stone 26 in the ring 42 is advantageously by driving.
- the assembly thus obtained can also be driven into the core 27a.
- the stone 26 and the ring 42 can be removed or moved to ensure a suitable distance between the stone 26 and the pivot-pivot stone 31. This distance is important to ensure good resistance of the oil. This is, in fact, retained by capillarity between the stone 26 and the counter-pivot stone 31. If the distance is too small, the amount of trapped oil is low. If, on the contrary, this distance is too great, the trapped oil drop does not hold well in place is likely to be expelled during a shock.
- the stone 26 is not included in the thickness of the monolithic piece 24, as is the case in the first variant. It is, on the contrary, interposed between the piece 24 and the annular piece 22, being fixed to the piece 24 by pins 43 engaged in holes in the ring 42 and in the central portion 27 of the monolithic piece 24.
- the pins 43 can be driven into the ring 42 and glued into the piece 24.
- the piece 24 is directly fixed by driving or gluing in the plate 10. The piece 22 thus no longer ensures the axial positioning of the bearing 12. It has more, for function, that to serve as a stop to the tigeron 17 as explained above.
- the pins 43 are attached to the ring 42. It is obvious that they could also be manufactured in one piece with the ring 42, by machining, stamping or adding material.
- Figures 7 and 8 differs from that of Figures 5 and 6 that the pins 43 protrude from the monolithic part 24.
- a ring 44 of metal for example brass or gold, also provided with holes , serves as a housing at the ends of the pins 43. More specifically, the pins 43 are driven into the holes in the ring 44. In this way, it serves as a fastener, now in place the stone 26 on the part 24.
- the ring 44 can be used to ensure an aesthetic function, to represent, for example, the logo of the watch and to ensure disassembly easier to achieve.
- the monolithic piece 24 comprises, as before, a central portion 27 forming the counter-pivot stone 31, and a peripheral portion 28.
- FIGS. 9 and 10 are a device according to this embodiment respectively seen in section and from above, and Figures 11 and 12 the monolithic parts 24 views on both sides.
- the monolithic piece 24 has a two-level structure with, at the first level, a first set of three arms forming a first elastic member 45 connecting the peripheral portion 28 to the central portion 27, and to the second level, three arms forming a second elastic member 46 secured to the peripheral portion 28 and enclosing the pierced stone 26.
- the latter can be fixed to the elastic member 46 by gluing.
- the elastic member 45 and the central portion 27 occupy a first level
- the elastic member 46 and the stone 26 a second level
- the peripheral portion 28 occupies the two levels.
- the arms of the Elastics 45 and 46 have a meander structure. They could however also have a spiral shape.
- the manufacture of the part 24 is done, as previously by photolithography and etching techniques.
- a mask is placed on one of the faces of the plate in which the monolithic pieces are made, and this face is chemically etched on a little more than half the thickness.
- the shapes of the constituent parts of the first level are defined.
- the piece is turned over and a mask is arranged to define the structure of the second level.
- the plate is, here too, attacked on a little more than half of the thickness. In this way, the two levels are perfectly defined and independent.
- the monolithic pieces 24 are extracted from the base plate by attacking the periphery over the entire thickness.
- the monolithic parts 24 are fixed to the frame of the movement identically to the variant shown in Figures 1 and 2.
- the forces generated by an action of the axis of the balance 14 on the pierced stone 26 or on the counter pivot stone 31 can be dimensioned independently.
- FIGS. 13 and 14 A third embodiment is shown, in two variants, in FIGS. 13 and 14.
- the device comprises, in addition to monolithic parts 24, second monolithic pieces 47.
- the parts 24 have a constant thickness. They each comprise the peripheral portion 28, the central portion 27 forming the counter pivot stone 31, and arms forming the elastic member 29.
- the pierced stones 26 are each fixed to one of the monolithic pieces 47.
- the latter comprise also a peripheral portion 48, a central portion 49 and an elastic member 51 formed of arms connecting the peripheral portion 48 to the central portion 49, which is pierced at its center, to form a hole 52 in which the pierced stone 26 is fixed, for example by gluing.
- This solution also allows to have independent elastic members with different characteristics to cooperate on the one hand with the stone 26, on the other hand with the stone against pivot 31.
- the fasteners 22 and 34 are each provided with two bearing surfaces 53 and 54, on which the monolithic parts 24 and 47 are respectively supported and fixed, for example by means of glue points. These members 22 and 34 are themselves respectively driven into the plate 10 and the bridge 11.
- the monolithic parts 24 and 47 are substantially thicker than in the variant of Figure 13.
- the monolithic piece 47 is provided with a hole 55 in which is fixed the pierced stone 26 This hole 55 is pierced with a central hole 56 and lateral holes 57, one of which is visible in the drawing.
- the holes 57 serve to facilitate cleaning, such as the holes 33 described with reference to FIGS. 1 to 3.
- the monolithic piece 24 is provided with a central stud 58 engaged in the hole 56, with a slight clearance.
- the end of the stud 58 provides the stone counter pivot function 31.
- this device during axial shocks is the same as for the embodiments described above. This is not the case during radial shocks. With this structure, as long as the shocks are weak, only the elastic member 51 is biased. If the shock is greater, the wall of the hole 56 bears against the stud 58, so that the elastic member 29 is also biased.
- the bearings described above may be the subject of many other embodiments or variants, without departing from the scope of the invention.
- the monolithic parts may be made of silicon or another preferably monocrystalline material easily machinable by photolithography and chemical etching techniques. These parts may, in addition, undergo surface treatments, for example be coated with a diamond layer or be oxidized.
- the breakthrough stone 26 of monolithic manner with the elastic member, the pivot-pivoting stone 31 being then arranged with reference to the monolithic piece as is described above with regard to the pierced stone 26.
- the two stones 26 and 31 both can also be made monolithically with the elastic member.
- the friction implies that a minimum force must be applied to the pivot to cause a displacement of the central portion 27. In other words, a disturbance generating a force below this minimum force, would not overcome the forces related to friction and the device would not be disturbed.
- FIG. 15 provides an example illustrating such a friction element.
- the pierced stone 26 of the pivoting member 32 comprises around it, a flange 26b whose walls define a first truncated cone.
- the annular piece 34 comprises, around the hole 23 through which the tigeron 17 passes, a cup 50 whose walls define a second truncated cone.
- the walls of the first and second truncated cones are arranged so that, when the resilient arms are in their rest position, they are flush with each other.
- a slight prestress in the axis of pivoting supports the walls of the flange 26b against that of the cup 50.
- the walls are substantially parallel, to avoid shocks between the two truncated cone.
- the angle of the truncated cone can be relatively open, that is to say between 120 and 180 degrees, approximately.
- the value of the angle defines the friction generated between the two truncated cones and therefore the minimum force to be applied to cause a displacement of the central portion 27.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Adornments (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01726/07A CH705112B1 (fr) | 2007-11-07 | 2007-11-07 | Palier amortisseur de chocs pour pièce d'horlogerie. |
PCT/EP2008/065144 WO2009060074A1 (fr) | 2007-11-07 | 2008-11-07 | Palier amortisseur de chocs pour piece d'horlogerie |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2206022A1 true EP2206022A1 (fr) | 2010-07-14 |
EP2206022B1 EP2206022B1 (fr) | 2015-06-03 |
Family
ID=39620230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08847741.9A Not-in-force EP2206022B1 (fr) | 2007-11-07 | 2008-11-07 | Palier amortisseur de chocs pour piece d'horlogerie |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2206022B1 (fr) |
CH (1) | CH705112B1 (fr) |
WO (1) | WO2009060074A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3070544A1 (fr) | 2015-03-20 | 2016-09-21 | Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA | Palier antichoc pour piece d'horlogerie |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5657106B2 (ja) * | 2010-06-22 | 2015-01-21 | ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド | 時計の衝撃吸収軸受 |
CN103988133B (zh) * | 2011-12-12 | 2017-03-01 | 斯沃奇集团研究和开发有限公司 | 用于钟表的抗震轴承 |
CH707809B1 (fr) * | 2013-03-19 | 2017-05-31 | Nivarox Far Sa | Palier pour mécanisme d'horlogerie. |
EP2806314A1 (fr) | 2013-05-24 | 2014-11-26 | The Swatch Group Research and Development Ltd. | Amortisseur de choc a baïonnette |
CH709867B1 (fr) | 2014-07-14 | 2018-12-14 | Mft Et Fabrique De Montres Et Chronometres Ulysse Nardin Le Locle Sa | Palier antichoc pour pièce d'horlogerie. |
CH709908A1 (fr) * | 2014-07-22 | 2016-01-29 | Richemont Int Sa | Palier amortisseur de choc pour pièce d'horlogerie. |
JP7100650B2 (ja) * | 2017-02-13 | 2022-07-13 | パテック フィリップ ソシエテ アノニム ジュネーブ | 時計用駆動部材 |
EP3770699A1 (fr) * | 2019-07-26 | 2021-01-27 | Comadur S.A. | Pierre, notamment pour un mouvement d'horlogerie, et son procede de fabrication |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH235315A (fr) * | 1942-09-30 | 1944-11-30 | Erismann Schinz Sa | Pare-choc pour pièce d'horlogerie. |
CH286182A (fr) * | 1950-06-19 | 1952-10-15 | Graef Jean Pierre | Palier pour mobile de mouvement d'horlogerie. |
FR1585772A (fr) * | 1967-10-16 | 1970-01-30 | ||
CH546975A (fr) * | 1971-12-23 | 1974-03-15 | ||
CH495673A4 (fr) | 1973-04-06 | 1976-10-29 | Seitz Sa | Dispositif de pivotement de l'ace d'un mobile d'horlogerie |
FR2279140A1 (fr) * | 1973-12-18 | 1976-02-13 | Epsilon Sarl | Palier amortisseur de chocs |
FR2363727A1 (fr) * | 1976-09-06 | 1978-03-31 | Cattin Sa Ets | Perfectionnements aux paliers amortisseurs de chocs pour axes ou pivots |
DE2854801A1 (de) * | 1977-12-20 | 1979-06-21 | Kif Parechoc Sa | Verfahren zur herstellung eines metallischen zapfenlagers bzw. steins fuer ein in der uhrmacherei und der feinmechanik verwendung findendes lager und durch anwendung dieses verfahrens erhaltener stein |
JP3718560B2 (ja) | 1996-06-26 | 2005-11-24 | 昭男 平根 | スポット溶接機 |
US6755566B2 (en) * | 2001-02-15 | 2004-06-29 | Konrad Damasko | Clockwork |
CH697017A5 (fr) | 2003-03-26 | 2008-03-14 | Franck Muller Watchland S A | Dispositif anti-chocs pour mobile tournant sur un axe. |
EP1696286B1 (fr) * | 2005-02-23 | 2010-12-29 | ETA SA Manufacture Horlogère Suisse | Palier amortisseur de chocs pour pièce d'horlogerie |
-
2007
- 2007-11-07 CH CH01726/07A patent/CH705112B1/fr not_active IP Right Cessation
-
2008
- 2008-11-07 WO PCT/EP2008/065144 patent/WO2009060074A1/fr active Application Filing
- 2008-11-07 EP EP08847741.9A patent/EP2206022B1/fr not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2009060074A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3070544A1 (fr) | 2015-03-20 | 2016-09-21 | Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA | Palier antichoc pour piece d'horlogerie |
EP3869281A1 (fr) | 2015-03-20 | 2021-08-25 | Manufacture et fabrique de montres et chronomètres, Ulysse Nardin Le Locle S.A. | Palier antichoc pour pièce d'horlogerie |
Also Published As
Publication number | Publication date |
---|---|
EP2206022B1 (fr) | 2015-06-03 |
WO2009060074A1 (fr) | 2009-05-14 |
CH705112B1 (fr) | 2012-12-31 |
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