EP2506093B1 - Unruh für Uhrwerk - Google Patents

Unruh für Uhrwerk Download PDF

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Publication number
EP2506093B1
EP2506093B1 EP20110002625 EP11002625A EP2506093B1 EP 2506093 B1 EP2506093 B1 EP 2506093B1 EP 20110002625 EP20110002625 EP 20110002625 EP 11002625 A EP11002625 A EP 11002625A EP 2506093 B1 EP2506093 B1 EP 2506093B1
Authority
EP
European Patent Office
Prior art keywords
balance
housing
assembly
wall
assembly element
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
EP20110002625
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English (en)
French (fr)
Other versions
EP2506093A1 (de
Inventor
James Hide
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
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP20110002625 priority Critical patent/EP2506093B1/de
Publication of EP2506093A1 publication Critical patent/EP2506093A1/de
Application granted granted Critical
Publication of EP2506093B1 publication Critical patent/EP2506093B1/de
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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
    • G04B18/00—Mechanisms for setting frequency
    • G04B18/006—Mechanisms for setting frequency by adjusting the devices fixed on the balance
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction

Definitions

  • the present invention relates to a pendulum for a watch movement.
  • the balance In a mechanical clockwork movement, the balance is, with the spiral spring with which it is associated, the regulating member of the movement.
  • the balance is an inertial element which, in operation, oscillates around a position of equilibrium under the effect of pulses which are communicated to it by the escapement of the movement and a return torque exerted on it by the spring spiral.
  • the oscillation frequency of the balance depends on the moment of inertia of it and the return torque of the spiral spring.
  • a balance and a spiral spring are chosen to obtain a desired frequency. This operation, called “pairing", however, makes it possible to obtain the desired frequency only in a certain approximation.
  • An additional adjustment operation is usually necessary. It consists in modifying the moment of inertia of the balance by removing a part of its material by milling or by moving control weights carried by the pendulum.
  • the present invention aims to remedy, in part at least, the aforementioned drawbacks and proposes for this purpose a pendulum for a watch movement comprising at least one elastic clamping member adapted to receive and elastically tighten an assembly element for mounting a control weight on the balance, the elastic clamping member comprising an elastic finger and a rigid wall housing defined by a recess of the balance, the housing being adapted to receive the assembly element, the housing wall comprising an opening allowing the elastic finger to be in contact with the connecting element to clamp it against said wall, characterized in that the elastic clamping member is oriented such that the free end portion of the elastic finger is able to move substantially along an arc whose center is on the axis of pivoting of the balance during the assembly of the element of a pendulum assembly.
  • the resilient clamping member allows the connecting member, typically a pin or lug, to rotate in the pendulum.
  • the force of the elastic clamping can be determined to facilitate the rotation of the assembly flyweight - assembly element.
  • the flyweight can thus have a shape and optimal dimensions to fulfill its function of adjusting the moment of inertia, without there being any need to worry about the strength of its connection with the connecting element, which can be big.
  • no addition of material such as glue or solder is necessary to assemble the connecting element and the balance, and such an assembly does not lead to uncontrolled deformation of the parts.
  • the balance and / or the assembly element may be made of one or more materials that do not lend themselves or lend themselves to operations of driving, welding or brazing.
  • the orientation of the resilient clamping member makes it possible to minimize the modification of the moment of inertia of the balance when assembling the assembly element to the balance.
  • the housing is adapted to receive a cylindrical connecting element with circular section and the housing wall is shaped to prevent the circular section cylindrical connecting element out of the housing through the opening.
  • the wall of the housing may extend over an angle greater than 180 °.
  • the wall of the housing may have a substantially cylindrical shape with circular section.
  • the wall of the housing may further comprise plates for positioning the assembly element.
  • the balance may comprise a structure made of silicon, diamond, quartz, glass or a ceramic such as silicon carbide, alumina or zirconium oxide, and the elastic clamping member may be formed in said structure.
  • a coating may cover the structure and the resilient clamping member.
  • the balance according to the invention may comprise a plurality of said elastic clamping members.
  • the present invention also proposes an assembly comprising a rocker as defined above and at least one adjusting weight mounted on the rocker by means of an assembly element cooperating with a said elastic clamping member of the rocker arm.
  • the adjustment weight may be in the form of a split ferrule mounted around a pin constituting the connecting element.
  • the adjustment weight can be in one piece with the connecting element.
  • Said assembly may comprise several said adjustment weights.
  • a balance wheel for a balance-type regulator member of a mechanical clockwork movement comprises, according to a particular embodiment of the invention, a structure 1 having a low density and at the periphery of the structure 1 metal parts 2 having a high density.
  • the structure 1 comprises a board 3 of thickness e, which is typically constant.
  • the plate 3 has an annular central portion 4 through which can pass the shaft on which is intended to be mounted the balance, a serge 5, for example annular, arms 6 connecting the central portion 4 to the serge 5 and, in the serge 5, cavities 7 in which are located the metal parts 2.
  • the structure 1 also comprises flanges 8 projecting from the upper surface of the board 3.
  • the cavities 7 and the metal parts 2 have an elongated and curved shape which follows the circular contour of structure 1 and are regularly distributed along this circular contour.
  • the number and dimensions of the metal parts 2 may vary. Their function is to increase the serge 5 in order to increase the ratio moment of inertia on mass of the pendulum.
  • the structure 1 is for example silicon, diamond, quartz, glass or a ceramic such as silicon carbide, alumina (corundum) or zirconium oxide. It is obtained by etching, preferably by deep reactive ion etching (DRIE).
  • DRIE deep reactive ion etching
  • the structure 1 may be covered with a coating, for example a coating of silicon oxide in the case where it is silicon.
  • the metal parts 2 are they obtained by electroforming (galvanic growth). More details on how to make this pendulum can be found in the patent application WO 2008/135817 of the present applicant.
  • the board 3 comprises resilient clamping members 9, four in number in the example shown. These organs 9, illustrated in figures 1 and 3 , are made during the etching of the structure 1 and are each defined by a recess 10 of particular shape of said structure.
  • Each elastic clamping member 9 comprises an elastic finger 11 that can deform in the recess 10, in the plane of the board 3, and a rigid wall housing 12.
  • the housing 12 has a generally cylindrical shape with a circular section opening on the two faces of the structure 1, more precisely of the board 3, but with a radial opening 13 in its wall allowing the passage of a curved free end portion 14 of the finger 11.
  • the housing 12 is intended to receive an element d cylindrical assembly with a circular section, namely a pin 15, for fixing a weight 16 to the balance.
  • a weight 16 of the four equipping the balance have been shown to leave completely visible two resilient clamping members 9.
  • Each counterweight 16 is in the traditional form of a split ring forcibly mounted around a respective pin 15, the cleft of the ferrule making the latter asymmetrical and giving it a certain elasticity.
  • each pin 15 has a diameter slightly smaller than that of the corresponding housing 12. When assembled with the beam, each pin 15 is engaged in its housing 12 along the axis thereof, which is parallel to the pivot axis A of the beam.
  • each pin 15 has a chamfer at least at its end by which it is engaged. This chamfer cooperates with the end portion 14 of the finger 11 during engagement of the pin 15 in the housing 12 to deform the finger 11 so that it withdraws from the housing 12 and leaves room for the pin 15.
  • the finger 11 constrained by the pin 15 exerts on the latter a reaction force which clamps against the portion of the wall of the housing 12 opposite the opening 13.
  • the pin 15 is thus maintained in position axially and radially in the housing 12.
  • the finger 11 is shown in its rest position, that is to say the position it occupies in the absence of pin 15 in the housing 12.
  • each housing 12 may comprise, opposite the opening 13, two plates 17 separated from each other by an angle by example between 60 ° and 100 °. These two plates 17 and the free end portion 14 of the finger 11 together define three discrete zones of contact with the pin 15.
  • the tightening of the pins 15 in the housings 12 being less strong than the connection between the weights 16 and the pins 15, when the weights 16 will be turned to change the position of their centers of gravity and thus adjust the moment of inertia of the balance this are the pins 15 which rotate in the housing 12 rather than the weights 16 around the pins 15.
  • the rotation of the weights 16 is facilitated.
  • the dimensions of the fingers 11 are determined to obtain a desired clamping force of the pins 15 in the housings 12. Given the lightness of the weights 16, the clamping force can be relatively low.
  • the weights 16 can be shaped and dimensioned independently of the problem of their attachment to the balance and can therefore be optimized for the function they perform.
  • connection between the weights 16 and the pins 15 can be very strong. Each weight can even be in one piece with its pin 15, as in the variant shown in FIGS. Figures 4 and 5 where the weight, designated by the mark 16a, is asymmetrical and comprises a pin 15a fulfilling the function of the pin 15.
  • the deformation of the fingers 11 during assembly of the pins 15 to the pendulum may cause a change in the moment of inertia of the balance.
  • each finger 11 is separated from the wall of the corresponding recess 10 depending on the width of the etching line of the structure 1. It is known that it is advantageous during an etching operation, particularly if a deep ionic reactive etching, that the width of the engraving line is constant, this to allow the etching speed to be the same on the entire plate in which the etching is performed. In the present invention, this can result in the fingers 11 being too far from the wall of the recesses 10 for said wall, designated at the figure 3 by the reference 18, can serve as a protective stop for the fingers 11.
  • each finger 11 is protected by the wall of the corresponding housing 12 which prevents the pin 15 from protruding radially from the housing 12.
  • the wall of each housing 12 extends over a greater angle at 180 ° (this angle being measured from the axis of the pin 15 when it is in place in the housing 12, and in a plane perpendicular to this axis), for example an angle of between 200 ° and 280 °, and the opening 13 therefore extends over an angle less than 180 °, for example an angle between 80 ° and 160 °.
  • the resilient clamping members 9 according to the invention thus allow the assembly of flyweights 16 on the balance in reduced spaces such as the spaces between the flanges 8 while protecting the elastic fingers 11 accidental stresses too high.
  • the pins 15 and the weights 16 may be metal, for example copper-beryllium.
  • the fingers 11 may have a variable width, as shown, to make substantially uniform the distribution of stresses within these fingers 11.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adornments (AREA)
  • Micromachines (AREA)

Claims (11)

  1. Unruh für Uhrwerke, die mindestens ein elastisches Klemmorgan (9) umfasst, das geeignet ist, ein Montageelement (15) zum Anbringen eines Reguliergewichtchens (16) auf der Unruh aufzunehmen und elastisch zu klemmen, wobei das elastische Klemmorgan (9) einen elastischen Finger (11) und eine Lagerung mit starrer Wand (12) umfasst, die durch eine Aushöhlung (10) der Unruh definiert sind, wobei die Lagerung (12) geeignet ist, das Montagelement (15) aufzunehmen, wobei die Wand der Lagerung (12) eine Öffnung (13) umfasst, die es dem elastischen Finger (11) ermöglicht, mit dem Montageelement (15) in Berührung zu sein, um es gegen die Wand zu klemmen, dadurch gekennzeichnet, dass das elastische Klemmorgan (9) derart ausgerichtet ist, dass der freie Endabschnitt (14) des elastischen Fingers (11) geeignet ist, sich bei der Montage des Montageelements (15) an der Unruh im Wesentlichen entlang eines Kreisbogens (C) zu verschieben, dessen Mittelpunkt sich auf der Schwenkachse (A) der Unruh befindet.
  2. Unruh nach Anspruch 1, dadurch gekennzeichnet, dass die Lagerung (12) geeignet ist, ein zylindrisches Montageelement mit kreisförmigem Querschnitt (15) aufzunehmen, und dadurch, dass die Wand der Lagerung (12) angepasst ist, um das zylindrische Montageelement mit kreisförmigem Querschnitt (15) am Austreten aus der Lagerung (12) über die Öffnung (13) zu hindern.
  3. Unruh nach Anspruch 2, dadurch gekennzeichnet, dass die Wand der Lagerung (12) sich über einen Winkel erstreckt, der größer als 180° ist.
  4. Unruh nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Wand der Lagerung (12) eine im Wesentlichen zylindrische Form mit kreisförmigem Querschnitt aufweist.
  5. Unruh nach Anspruch 4, dadurch gekennzeichnet, dass die Wand der Lagerung (12) Abflachungen (17) zum Positionieren des Montageelements (15) umfasst.
  6. Unruh nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass sie eine Struktur (1) umfasst, die aus Silizium, Diamant, Quarz, Glas oder aus einer Keramik, wie Siliziumkarbid, Aluminiumoxid oder Zirkonoxid, hergestellt ist, und dadurch, dass das elastische Klemmorgan (9) in der Struktur (1) gebildet ist.
  7. Unruh nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass sie mehrere sogenannte elastische Klemmorgane (9) umfasst.
  8. Baugruppe, die eine Unruh nach einem der Ansprüche 1 bis 7 und mindestens ein Reguliergewichtchen (16) umfasst, das über ein Montageelement (15), das mit einem sogenannten elastischen Klemmorgan (9) der Unruh zusammenwirkt, auf der Unruh angebracht ist.
  9. Baugruppe nach Anspruch 8, dadurch gekennzeichnet, dass das Reguliergewichtchen (16) die Form einer gespaltenen Spiralrolle aufweist, die um einen Sperrstift herum angebracht ist, der das Montageelement (15) bildet.
  10. Baugruppe nach Anspruch 8, dadurch gekennzeichnet, dass das Reguliergewichtchen (16a) einteilig mit dem Montageelement (15a) ist.
  11. Baugruppe nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass sie mehrere sogenannte Reguliergewichtchen (16) umfasst.
EP20110002625 2011-03-30 2011-03-30 Unruh für Uhrwerk Active EP2506093B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110002625 EP2506093B1 (de) 2011-03-30 2011-03-30 Unruh für Uhrwerk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110002625 EP2506093B1 (de) 2011-03-30 2011-03-30 Unruh für Uhrwerk

Publications (2)

Publication Number Publication Date
EP2506093A1 EP2506093A1 (de) 2012-10-03
EP2506093B1 true EP2506093B1 (de) 2014-04-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3825782B1 (de) * 2019-11-25 2023-11-15 Patek Philippe SA Genève Verstärkte uhrenkomponente

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103293938B (zh) * 2013-05-31 2015-12-02 天王电子（深圳）有限公司 具有调节惯量功能的摆轮及具有该摆轮的机械表
WO2023036928A1 (fr) * 2021-09-09 2023-03-16 Rolex Sa Élément inertiel pour mouvement horloger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US788399A (en) * 1904-08-22 1905-04-25 Joseph Alexandre Freund Watch-balance.
CH227189A (fr) * 1942-07-13 1943-05-31 Ebauches Sa Procédé de fabrication d'un balancier, et balancier fabriqué selon ce procédé.
GB610389A (en) * 1946-04-03 1948-10-14 Montres Era Sa C Ruefli Flury Improvements in balance wheels
CH343904A (fr) * 1959-06-03 1959-12-31 Rolex Montres Balancier pour pièce d'horlogerie
CH714952B1 (fr) 2007-05-08 2019-10-31 Patek Philippe Sa Geneve Composant horloger, son procédé de fabrication et application de ce procédé.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3825782B1 (de) * 2019-11-25 2023-11-15 Patek Philippe SA Genève Verstärkte uhrenkomponente

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EP2506093A1 (de) 2012-10-03

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