EP3825782A1 - Verstärkte uhrenkomponente - Google Patents

Verstärkte uhrenkomponente Download PDF

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Publication number
EP3825782A1
EP3825782A1 EP19211198.7A EP19211198A EP3825782A1 EP 3825782 A1 EP3825782 A1 EP 3825782A1 EP 19211198 A EP19211198 A EP 19211198A EP 3825782 A1 EP3825782 A1 EP 3825782A1
Authority
EP
European Patent Office
Prior art keywords
component
watch
edge
protective member
coating
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
Application number
EP19211198.7A
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English (en)
French (fr)
Other versions
EP3825782B1 (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 EP19211198.7A priority Critical patent/EP3825782B1/de
Publication of EP3825782A1 publication Critical patent/EP3825782A1/de
Application granted granted Critical
Publication of EP3825782B1 publication Critical patent/EP3825782B1/de
Active legal-status Critical Current
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
    • 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
    • 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

Definitions

  • the present invention relates to a watch component comprising a composite part comprising an upper face, a lower face and a wafer, made of a first material and coated with a second material to increase its mechanical strength, a part of its wafer being devoid of this. coating.
  • the present invention also relates to a method of manufacturing such a component.
  • Silicon is a material of choice for the production of watch components because of its low density, its elasticity, its non-magnetism and its ability to be machined by engraving techniques.
  • its mechanical strength, in particular its impact resistance is relatively low because, on the one hand, the silicon does not deform plastically and, on the other hand, the fracture initiators propagate very much. easily along its crystalline planes.
  • micro-etching techniques used for the manufacture of silicon parts allow the simultaneous production of a batch of parts from the same silicon wafer.
  • silicon parts are left to form fasteners or bridges holding each of the parts attached to the rest of the plate. These fasteners will later be broken to free the parts from the plate.
  • the fasteners may not be broken until the end of the manufacturing process, which implies that the reinforcing layer is formed, after etching, over the entire silicon wafer, including the parts and the fasteners.
  • the reinforcing layer for example in silicon oxide
  • zones of fragility which will allow any initial fractures resulting from impacts to propagate inside the part and cause it to rupture.
  • the fragility of these zones is aggravated by the fact that their surface condition is generally less good than that of the rest of the part and that they can present micro-cracks as soon as they are formed.
  • the patent application EP 2 503 404 describes a manufacturing process making it possible to limit the impact of such fragile zones on the strength of the component.
  • it is proposed, unlike the practice which consists in eliminating by machining or abrasion any remaining attachment parts on the parts once separated from the plate, to detach the part from the plate so that at least part of at least one fastener is left on the final component ready to be mounted in the mechanism.
  • the clip is typically laser cut so that its length is at least equal to its width and / or its thickness. The fact of leaving at least part of at least one fastener on the final component makes it possible to significantly increase the mechanical resistance of the component.
  • the invention relates to a watch component comprising a composite part comprising an upper face, a lower face and an edge, made of a first material and coated with a second material to increase its mechanical strength, at least part of its edge being devoid of of this coating, typically following the rupture of one or more fasteners resulting from its manufacturing process.
  • the part or parts of the edge of the part devoid of this coating constitute areas of weakness of the component.
  • An aim of the present invention is to provide such a component, the risk of which of breakage or of damage in the event of an impact, typically direct, on the or one of said zones of weakness is reduced.
  • the invention provides for this purpose a watch component comprising a composite part comprising an upper face, a lower face and a wafer, made of a first material and coated with a second material to increase its mechanical strength, at least part of its edge being devoid of this coating, typically following the rupture of one or more fasteners resulting from its manufacturing process, said watch component being characterized in that it comprises a protective member which, in top view or in bottom view , extends outside the edge of the part at the level of said uncoated portion, at least partially, and preferably completely, covering said portion.
  • Said protective member makes it possible to limit the possibility of direct impacts on the part of the edge of the composite part devoid of coating with which it is associated and thus has, as its name suggests, a protective function.
  • said protective member has another function such as, for example, an adjustment function, a weighting function, or a tribological function, preferably, an adjustment function.
  • a protective member having an adjustment function one can for example cite a weight for adjusting the inertia of a balance, an eccentric allowing, by being pivoted, to adjust a rest position or function of a component with which it cooperates or well to adjust the stroke of a component with which it cooperates.
  • the horological component is characterized in that said at least part of the edge of its composite part without coating is set back in the component, typically in a notch in the edge of said composite part. The latter is thus doubly protected against direct impacts, by the protective member and by the rest of the edge of the composite part.
  • the composite part of the component according to the invention can comprise several parts of its edge devoid of coating. It then typically has at least as many protective members as said parts so that each of said parts without a coating is associated with a separate protective member.
  • each of the protective members associated with a part of the edge of the composite part devoid of coating extends outside the edge of this part at the level of this part. by at least partially covering this part.
  • a protective member When a protective member is an adjustment member, it extends outside the edge of the part at the level of the part without any coating with which it is associated, at least partially and preferably completely covering this part and this regardless of its adjustment position.
  • the invention also provides a timepiece mechanism comprising a first timepiece component according to the invention and a second timepiece component intended to cooperate directly with said first watch component during operation of the mechanism, characterized in that the second watch component cannot reach the first watch component only on part of the edge of its composite part bearing the coating or on a protective member and this regardless of the adjustment position of the adjustable protective member (s), if there is any.
  • the invention also relates to a timepiece such as a wristwatch, a pocket watch, a clock or a clock comprising such a clock mechanism.
  • Step a) of the manufacturing process according to the invention is typically carried out using the deep reactive ion etching technique DRIE (Deep Reactive Ion Etching).
  • DRIE Deep Reactive Ion Etching
  • Step c) of the manufacturing method according to the invention is preferably carried out by cutting the fasteners by machining means, for example by laser. It can also be implemented by making a break, for example by making two break initiators and then applying force to the clip to break it.
  • the first material according to the invention is typically a “brittle” material, that is to say one which is not capable of deforming plastically (at room temperature, ie at 25 ° C.).
  • This is typically silicon.
  • the silicon can be monocrystalline, polycrystalline or amorphous, and have different crystalline orientations. It can also be doped or not.
  • the second material according to the invention is for example silicon oxide, carbide or nitride, titanium nitride or carbide or diamond, silicon oxide being preferred.
  • the protective member according to the invention is typically made on a metal basis, for example a copper-beryllium or nickel phosphorus alloy, gold, platinum, steel or nickel. As a variant, it could also be made of wood, ceramic, polymer or rigid foam.
  • the watch component according to the invention has enhanced mechanical resistance, in particular to direct impacts.
  • the arrangement of its protective member (s) makes it less likely to suffer damage or even break in the event of an impact, for example during storage, transport, assembly or removal. use within a watch mechanism.
  • the component according to the invention also has the advantage of being able to be manufactured in a precise manner and in batches, a large number of components being able to be produced simultaneously from the same plate.
  • a balance 1 for a regulator of the sprung balance type of a mechanical timepiece movement comprises, according to a particular embodiment of the invention, a composite structure 2 of low density carrying metal parts 3 at its periphery. having a high density and inertia adjustment weights 11.
  • the balance 1 and its structure 2 typically extend in a plane.
  • the structure 2 has an upper face 2.1 and a lower face 2.2 delimiting its edge 2.3.
  • edge is meant the edge defining the outer contour of the balance structure 2 1. This therefore excludes the internal contours of the openings 2.4 which are optional.
  • the structure 2 comprises a board 4 of thickness e, typically constant.
  • the board 4 has an annular central part 5 through which can pass the shaft on which the balance 1 is intended to be mounted, a rim, for example comprising two parts 6a and 6b in the form of diametrically opposed circular arcs, arm 7 connecting the central part 5 to the two parts 6a, 6b of the rim and, in each of the parts 6a, 6b of the rim, cavities 8 in which the metal parts 3 are located.
  • the structure 2 comprises also rims 9 projecting from the upper surface of the board 4. These rims 9 extend in height the wall of the cavities 8, allowing the cavities 8 and therefore the metal parts 3 which fill them to have a greater height or thickness than the thickness e of the board 4.
  • Each of the cavities 8 and of the metal parts 3 has an elongated and curved shape which follows the arcuate contour of the part 6a or 6b of the rim in which it is located.
  • the number and dimensions of the metal parts 3 may vary. Their function is to make the rim heavier in order to increase the moment of inertia to mass ratio of balance 1.
  • the structure 2 comprises four studs 10 each carrying a weight 11, said weight 11 allowing the adjustment of the moment of inertia of the balance 1.
  • These weights 11 are typically held on the studs 10 by elastic clamping. The elastic tightening is such that each of them is able to pivot around the stud which carries it for the adjustment of the inertia of the balance 1.
  • the balance 1 can be entirely monolithic.
  • Structure 2 is therefore typically monolithic. It is made of a base material 12, for example silicon, covered with a coating 13 intended to increase the mechanical resistance of the balance 1, in particular its impact resistance.
  • the coating 13 is, for example, a layer of silicon oxide.
  • the balance 1 is manufactured according to a process similar to that described in the patent application WO 2008/135817 of the present plaintiff.
  • a plate of the base material 12 is etched, preferably by deep reactive ionic etching DRIE, to form a batch of parts each having the shape of structure 2, each of these parts being attached to the rest of the plate by fasteners. or bridges of material left during engraving.
  • the coating 13 is formed on all surfaces of the plate, including the surfaces of parts and fasteners.
  • the metal parts 3 are formed in cavities defined by the coated parts, namely the cavities 8, typically by electro-forming (galvanic growth).
  • the parts are detached from the plate and the adjustment weights 11 are mounted on the balance 1.
  • the coating 13 can be formed by applying a heat treatment to the plate to oxidize its surfaces, as in the patent application. WO 2008/135817 .
  • the coating 13 can be formed, for example, by chemical vapor deposition or physical vapor deposition.
  • the detachment of the parts from the plate creates fragile end surfaces 15 devoid of the coating 13.
  • the detachment is typically done in a manner which leaves fastener portions 14 on the parts in order. to limit the propagation of fracture initiators which could occur on these “fragile” surfaces, as described in the application EP 2 503 404 .
  • said fastening parts 14 protrude from the edge 2.3 of each part. Each of them is covered by the coating 13 except on the part of its edge 2.3 corresponding to its end surface 15 created by the detachment of the parts of the plate ( figure 4a ).
  • the length of the fastening portions 14 is typically greater than or equal to its width and / or its thickness measured at the end surface 15, as described in the application. EP 2 503 404 .
  • the position of the studs 10 and the dimensions of the weights 11 are such that, in top view, each of the weights 11 extends outside the section 2.3 of the structure 2 at the level of a part separate attachment 14 by at least partially covering part 15 of the edge of this attachment 14 devoid of coating 13. Everything is arranged so that this is the case regardless of the adjustment position of the weight 11 considered.
  • Each adjustment weight 11 thus plays a protective role by limiting the possibility of direct impacts on the “fragile” parts 15 of section 2.3 of the balance 1 which could occur during its storage, transport or assembly in a watch mechanism. or again after said assembly, during normal operation of said clock mechanism.
  • the figure 2 illustrates a part of a watch mechanism comprising, among other things, a plate 16 on which the balance 1 are mounted and a balance stop mechanism 20, also called a “stop-second” or “stop-balance”.
  • the balance stop 20 comprises an elastic arm 21 which can be actuated by the time-setting rod (not shown) of the mechanism and the end of which is intended to cooperate directly with the periphery of the balance 1 to stop its oscillation by friction, and that whatever its position. It is possible that it comes to strike it directly opposite one of its fasteners 14 having a fragile zone 15.
  • the arm 21 of the stop-balance 20 generally has a thickness or height h corresponding to the sum of the thickness e of the board 4 and the thickness e ' of its weight and is arranged so that if it hits the balance 1 at the level of a fragile part 15 of its edge 2.3, the impact is made on the weight 11 and not on said fragile part 15. In other positions of the balance 1, the arm 21 would typically strike directly on a part. section 2.3 bearing the coating 13 or on another of the four weights 11.
  • the height h of the balance arm 21 could be different from the moment when the protection function is provided.
  • the arm 21 is arranged so that, once mounted in the watch mechanism, it is horizontally facing both at least a part of the section 2.3 of the plate 4 of the balance 1 and at least a part weights 11.
  • the weights 11 have a protective role. vis-à-vis impacts against the arm 21 of the balance stop 20. In this way, the risk of breakage or major damage to the balance 1 during the actuation of the balance stop 20 is significantly reduced.
  • the weights 11 therefore have a dual role, they serve both as a protective member or mechanical “shield” of the balance 1 against shocks which may be unpredictable (transport, assembly, etc.) or predictable. (repeated shocks against a balance stop for example) and inertia adjustment member.
  • the weights 11 must have a high density to provide inertia to the balance 1 and preferably high mechanical strength. If they are typically made of a copper - beryllium alloy, the other materials traditionally used for the production of adjustment weights, such as gold, platinum, steel, nickel or a nickel-phosphorus alloy are perfectly suitable in within the scope of the invention.
  • the adjustment weights 11 could be mounted on the studs 10 before the fasteners break.
  • the structure 2 comprises four fragile parts 15 and four studs 10 each carrying an adjustment weight 11, each of said weights 11 protecting one of said fragile parts 15. It is clear that the structure 2 could comprise a different number of fragile parts 15 and of flyweights and that only certain fragile parts 15 could be protected by flyweights or else only certain flyweights 11 protect a fragile part 15.
  • the component according to the invention is a watch hammer and its adjustment member is an eccentric allowing the adjustment of its rest position against a stop.
  • the component according to the invention is a balancer 100 comprising a composite structure 102, typically made of silicon covered with silicon oxide, comprising an upper face, a lower face and a wafer.
  • a so-called fragile part 115 of this slice corresponding to the surface created by the breakage of a manufacturing fastener 114, is devoid of coating.
  • the structure 102 comprises studs 110 carrying inertia washers, one of them 111 is positioned so that, in top view, it extends outside the edge of the structure at the level of said fragile part 115 by completely covering said part.
  • This inertia washer has a dual role, both protective in that it limits the possibility of direct impacts on the fragile part 115 and at the same time increasing the weight to increase the inertia of the balance 100.
  • the part fragile 115 of the edge of the structure 102 is set back in this structure, in a notch in its edge, so as to further limit the possibility of direct impacts on the fragile part 115.
  • the manufacturing method according to the invention makes it possible to produce a large number of components simultaneously from the same wafer.
  • the watch component according to the invention has an aesthetic advantage in that it makes it possible to hide these fastening parts. .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
EP19211198.7A 2019-11-25 2019-11-25 Verstärkte uhrenkomponente Active EP3825782B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19211198.7A EP3825782B1 (de) 2019-11-25 2019-11-25 Verstärkte uhrenkomponente

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19211198.7A EP3825782B1 (de) 2019-11-25 2019-11-25 Verstärkte uhrenkomponente

Publications (2)

Publication Number Publication Date
EP3825782A1 true EP3825782A1 (de) 2021-05-26
EP3825782B1 EP3825782B1 (de) 2023-11-15

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Family Applications (1)

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EP19211198.7A Active EP3825782B1 (de) 2019-11-25 2019-11-25 Verstärkte uhrenkomponente

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007000271A1 (fr) 2005-06-28 2007-01-04 Eta Sa Manufacture Horlogere Suisse Piece de micro-mecanique renforcee
WO2008135817A2 (fr) 2007-05-08 2008-11-13 Patek, Philippe Sa Composant horloger et son procédé de fabrication
EP2337221A1 (de) * 2009-12-15 2011-06-22 The Swatch Group Research and Development Ltd. Thermokompensierter Resonator mindestens ersten und zweiten Grades
CH702799A2 (fr) * 2010-03-04 2011-09-15 Montres Breguet Sa Pièce d'horlogerie comportant un mouvement mécanique à haute fréquence.
EP2503404A1 (de) 2011-03-23 2012-09-26 Patek Philippe SA Genève Verfahren zur Herstellung eines mechanischen Bauteils, insbesondere für Uhren
EP3182213A1 (de) * 2015-12-16 2017-06-21 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Einstellmechanismus der mittleren geschwindigkeit in einem uhrwerk, und entsprechendes uhrwerk

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2506093B1 (de) * 2011-03-30 2014-04-09 Patek Philippe SA Genève Unruh für Uhrwerk

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007000271A1 (fr) 2005-06-28 2007-01-04 Eta Sa Manufacture Horlogere Suisse Piece de micro-mecanique renforcee
WO2008135817A2 (fr) 2007-05-08 2008-11-13 Patek, Philippe Sa Composant horloger et son procédé de fabrication
EP2337221A1 (de) * 2009-12-15 2011-06-22 The Swatch Group Research and Development Ltd. Thermokompensierter Resonator mindestens ersten und zweiten Grades
CH702799A2 (fr) * 2010-03-04 2011-09-15 Montres Breguet Sa Pièce d'horlogerie comportant un mouvement mécanique à haute fréquence.
EP2503404A1 (de) 2011-03-23 2012-09-26 Patek Philippe SA Genève Verfahren zur Herstellung eines mechanischen Bauteils, insbesondere für Uhren
EP3182213A1 (de) * 2015-12-16 2017-06-21 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Einstellmechanismus der mittleren geschwindigkeit in einem uhrwerk, und entsprechendes uhrwerk

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