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EP3761122B1 - Drehteil für uhrhemmung, entsprechender hemmungsmechanismus und entsprechendes uhrenteil - Google Patents

Drehteil für uhrhemmung, entsprechender hemmungsmechanismus und entsprechendes uhrenteil Download PDF

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Publication number
EP3761122B1
EP3761122B1 EP20181985.1A EP20181985A EP3761122B1 EP 3761122 B1 EP3761122 B1 EP 3761122B1 EP 20181985 A EP20181985 A EP 20181985A EP 3761122 B1 EP3761122 B1 EP 3761122B1
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EP
European Patent Office
Prior art keywords
escapement
strip
pivot
pinion
wheel
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
EP20181985.1A
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English (en)
French (fr)
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EP3761122A1 (de
Inventor
Dominique Renaud
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.)
Besse Francois
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Besse Francois
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Publication of EP3761122A1 publication Critical patent/EP3761122A1/de
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    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to the field of watchmaking. It relates, more particularly, to a horological escapement wheel set such as an anchor, in particular for Swiss lever escapement mechanisms, provided with a pivot of the knife pivot type.
  • the invention also relates to an escapement mechanism equipped with such a bladed pivot wheel and a timepiece comprising such an escapement wheel and/or escapement mechanism.
  • Lever escapements certainly constitute the most common category of escapements in mechanical clockwork mechanisms, at least in the class of so-called free escapements.
  • a lever escapement Associated with a regulating organ, typically of the pendulum or balance-spring assembly type, a lever escapement makes it possible to maintain the oscillations of said regulating organ by transmitting to it by regular pulses, at a determined frequency, a fraction of the mechanical energy of the source of mechanical energy for a said watch mechanism, usually comprising at least one barrel spring.
  • the escapement also makes it possible to count the oscillations of the regulator member and, therefore, to count the time.
  • the object of the present invention is to propose a new geometry of an escapement mechanism which can be manufactured according to conventional industrial techniques and in materials usual in the field of watchmaking and which nevertheless makes it possible to singularly reduce mechanical disturbances such as friction, for example, thus improving the performance of a lever escapement.
  • Another object of the invention is to provide a timepiece comprising such an escapement comprising an anchor or any other escapement part whose displacement is less than 45 degrees, such as for example a trigger.
  • the present invention thus proposes an escapement mechanism according to claim 1.
  • the pivot of the escape wheel set is arranged to allow rotation of said wheel set around said axis of rotation at an angle of at most 45°.
  • the mobile is an anchor and the body is a rod extending substantially in a longitudinal direction contained in said plane and carrying at a first end a first and a second arm and at a second end a fork.
  • the pivot of the escapement wheel set comprises a blade and a counter-blade, the blade or the counter-blade being fixed to the body of the wheel set when it is able to be fixed to a frame element of a watch movement.
  • the blade comprises a blade edge and the counter-blade a groove of a shape complementary to the edge of the blade.
  • the groove has the shape of a dihedral in a plane perpendicular to the virtual pivot axis of the escapement wheel set.
  • the escapement mechanism comprises a member for returning the second wheel set to the rest position.
  • the return member is secured to the second escapement mobile at a first end, in particular to the pivot, and adapted to be secured to a frame element of a watch movement at a second end.
  • the invention finally relates to a timepiece comprising said escapement mechanism.
  • THE figures 1 to 3 represent an improved lever watch escapement mechanism 1 according to a preferred embodiment.
  • This escapement mechanism 1 is equipped with an anchor 2 constituting an escape wheel set.
  • the invention applies appropriately to any escapement part, such as a trigger, rotatable over an angle of at most 45° in function in an escapement mechanism.
  • the anchor 2 conventionally comprises a rod 21 forming a body extending longitudinally along an axis X and carrying at a first end two arms 22 at the free ends of which are arranged integrally with pallets 25e, 25s.
  • the anchor 2 comprises a fork 23, partially visible in the figures, and of conventional form in itself, comprising two horns separated by a notch in which extends along the longitudinal axis X of the rod 21 a stinger.
  • the anchor 2 comprises an anchor pivot 24 by which it is adapted to be mounted so as to be able to rotate around a virtual axis Y defined by said pivot 24 on a frame element of a watch movement such as a plate between an escapement wheel set 3 and a regulating member 4 themselves rotatably mounted on a frame element of the watch movement around their own axes of rotation which are preferably parallel to that Y defined by the anchor pivot 24.
  • the longitudinal axis X of extension of the rod 21 is contained in a median plane of the anchor 2 perpendicular to the virtual Y axis of rotation defined by the pivot 24.
  • the escapement wheel 3 is preferably coupled in use by an escapement pinion coaxial with its axis of rotation to the cog of a watch movement and a source of driving energy of the watch movement such as one or more barrels.
  • the regulator member 4 can be a balance-spring assembly, of which only the large plate 41 and the pin 42 are shown in the figures for brevity.
  • the anchor 2 thus forms a member for transmitting an engine torque from the escapement wheel set 3 to the regulating member 4.
  • the pallets 25e, 25s are configured to interact alternately with the teeth 31 of the escapement wheel set 3 during rest phases ( Fig. 1 And 3 ) during which the pallets hold the escapement mobile 3 stationary during the free path of the additional arc of the regulating member 4 as well as during pulse phases ( fig.
  • the escapement mechanism 1 of the invention is thus similar and as shown in the figures to a classic Swiss lever escapement.
  • the anchor pivot 24 does not consist of a rod, shaft, pin driven into a suitable orifice of a plate as in a conventional lever escapement, but of a blade pivot.
  • the anchor 2 is advantageously elastically returned by an elastic return means 6 in each rest position in order to provide a constant draw of the escapement mobile on the anchor 2, as will be described later.
  • the blade pivot 24 of the anchor 2 advantageously consists firstly of a blade 241, defined by a first part or substantially laminar portion forming a projection on the surface of the rod of the anchor 2 along a median plane P perpendicular to the plane of the rod 21 of the anchor containing the longitudinal axis X thereof and one edge of which defines a edge of the blade 241f, that is to say a thinnest and most acute edge of the blade 241 of infinitesimal width compared to the other dimensions of the blade 241.
  • the lever pivot 24 comprises a counter-blade 242 capable of being fixed to a watch movement frame element such as a plate or a bridge.
  • This counter-blade 242 comprising a groove or notch 243 in the shape of a dihedral, at the bottom of which the blade edge bears.
  • the bottom of the groove 243 and the edge of the blade 241 are advantageously aligned along the longitudinal axis X of the rod 21 and thus define the virtual axis of the anchor pivot 24.
  • Such an anchor pivot configuration 24 is thus akin to the leaf pivot described in the application WO 2016012281 A1 of the Applicant.
  • the anchor 2 can thus pivot, according to a limited angular amplitude, relative to the counter-blade 242 around the virtual axis of pivot formed in contact with the edge of the blade and the bottom of the groove 243, whatever the orientation. of the pivot axis.
  • the groove 243 of the counter-blade 242 is shown in the figures as a dihedral; however, it could also have other shapes, provided that the radii of curvature of the edge of the blade 241 and of the bottom of the groove 243 are preferably substantially equal so that the edge of the blade rolls in the groove more than slips in it. the latter, said rolling then being able to be assimilated to a rotation due to the very small radius of the edge of the blade.
  • the respective positions of the blade 241 and of the counter-blade 242 with respect to the anchor 2 could be reversed; the blade 241 could thus be integral with an element of the frame of a watch movement and the counter-blade integral with the rod 21 of the lever 2.
  • the blade 241 of the anchor pivot 24 is advantageously held in abutment in the groove 243 by a return member.
  • This return member may for example consist of a circlip or a ring fitted together around the counter-blade 242 and of an edge of the blade opposite to the edge of the latter.
  • the two elements 241, 242 of the anchor pivot 24 are thus secured in translation in any direction orthogonal to the virtual axis Y of the pivot.
  • the return force passes through the axis of the pivot so as not to disturb the pivoting.
  • the blade return member 241 is none other than the elastic return member 6, advantageously of the anchor 2.
  • the elastic return member 6 of the anchor is arranged to offer a constant pulling force between the anchor 2 and the escape wheel set 3 in each rest position.
  • the return member 6 is formed of a leaf spring, one end of which is hooked onto the rear edge of the blade 241 opposite to the edge of the latter, as visible on the figure 1A , 2A , And 3A especially.
  • the other end of leaf spring 6 is able to be secured by any appropriate means (in particular pin, lug, screw or the like) to a fixed point on a frame element of a watch movement.
  • leaf spring 6 in the figures is completely arbitrary and has no limiting value of the shape or arrangement of said leaf spring 6 with respect to the other elements of the escapement mechanism 1 shown.
  • other forms of return members 6 can be envisaged by those skilled in the art in the field of watchmaking, in particular a spiral spring for example.
  • the spring 6 is shaped so as to exert a force in the plane P on the blade 241 in order to give it two so-called “bistable” positions; the first position being the blade 241 constrained on the left side of the counter-blade 242 and the second position being that opposite, that is to say the right side of the counter-blade 242.
  • the spring 6 is fixed by n in any way whatsoever on a fixed support such as the plate of a watch movement.
  • the anchor 2, its pivot 24 (the blade 241 and the counter-blade 242) as well as the escapement wheel set 3 can be made of several elements, preferably but not exclusively of metallic material, assembled together, or also monolithically by stamping or molding and machining or by LIGA type processes (acronym for "Röntgenlithography, Galvanoformung, Abformung” in German) or deep silicon etching, or by additive manufacturing processes, in particular by 3D printing .
  • the anchor 2 equipped with an anchor pivot 24 of the blade pivot type and the escapement mechanism 1 integrating the latter and recalled by a drawing spring 6 provide a significant reduction in friction and therefore energy losses. and efficiency of a classic Swiss lever escapement, which makes it possible to reduce the disturbance of the regulating organ of a watch movement comprising them, but also to significantly improve the power reserve by reducing the dissipation of energy driving by friction and maintaining a constant pulling force when the escapement wheel is at rest. It is therefore possible to optimize a lever escapement in a simple, reliable and economical manner without any significant complexification of the structure and the adjustment of the latter, but with increased performance.
  • the operation of the escapement mechanism 1 of the invention in this embodiment is substantially identical to that of a Swiss lever escapement classic.
  • a first resting position Fig. 1 and 1A
  • the escapement wheel set is supported by a tooth 31 on the rest plane of the 25th entry pallet and the fork 23 is held against a first pin 5 by the pulling effect of the escapement wheel set on the anchor 2.
  • the return spring 6 does not exert any particular action on the anchor 2, apart from the restoring force of the blade 241 in the groove 243 of the counter-blade 242.
  • the regulating member 4 traverses its additional arc.
  • a tooth 31 of the escapement wheel set 3 provides an impulse on the corresponding surface of the entry pallet 25e of the lever 2, as in a conventional Swiss lever escapement, thereby transmitting a fraction of driving energy to the anchor 2 which pivots around its virtual axis Y at the bearing zone of the blade 241 in the groove 243 of the counter-blade ( Fig. 2A ) and catches up with the regulating member 4 and transmits to it a corresponding driving impulse.
  • the regulating member 4, the anchor 2 and the escape wheel set 3 all then continue their respective rotation, in this case clockwise in the figures.
  • the anchor 2 then reaches its second rest position by abutment of its fork 23 against the second pin 5 ( Fig. 3 ) and a tooth 31 of escapement wheel set 3 comes to a halt on output pallet 25s of anchor 2.
  • Regulator member 4 then continues its course on its additional arc until its next alternation.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Medicinal Preparation (AREA)

Claims (6)

  1. Hemmungsmechanismus (1), umfassend ein Hemmungsdrehteil (3), das drehbeweglich um eine Drehachse ist und mit einer Reihe einer Umfangsverzahnung (1) ausgestattet ist, und ein zweites Hemmungsdrehteil (2) umfassend einen Zapfen (24), der eine Drehachse (Y) definiert, und einen Körper (21), der sich in einer Ebene senkrecht zu der besagten Drehachse erstreckt, wobei der Zapfen (24) eine virtuelle Drehachse (Y) definiert, die senkrecht zur Erweiterungsebene des Körpers (21) ausgerichtet ist, wobei das besagte zweite Drehteil (2) drehbeweglich um die virtuelle Drehachse (Y) zwischen zwei Ruhepositionen ist, und ein Rückzugsorgan (6) des zweiten Drehteils (2) in Ruheposition, dadurch gekennzeichnet, dass der Zapfen (24) eine Klinge (241) umfasst, die eine Kante (241f) umfasst, die einen Klingendraht definiert, und eine hintere Kante, die der Kante (241f), die einen Klingendraht definiert, gegenüberliegt, und ein Auflageelement (242), auf dem die einen Klingendraht der Klinge (241) definierende Kante (241f) durch das Rückzugsorgan (6), das das Rückzugsorgan der Klinge (241) bildet, in Auflage gehalten wird, wobei entweder die Klinge (241) oder das Auflageelement (242) mit dem Körper des zweiten Drehteils (2) fest verbunden ist und das andere davon, die Klinge (241) oder das Auflageelement (242), geeignet ist, mit einem Gestellelement eines Uhrwerks fest verbunden zu werden, und dadurch, dass das besagte Rückzugsorgan (6) aus einer Federklinge gebildet ist, deren eines Ende auf der hinteren Kante der Klinge (241) eingehakt ist, während das andere Ende der Federklinge geeignet ist, um mit einem Gestellelement eines Uhrwerks fest verbunden zu werden.
  2. Hemmungsmechanismus (1) nach Anspruch 1, in dem das zweite Hemmungsdrehteil (2) ein Uhrmacheranker ist, umfassend eine Stange (21), die den Körper des besagten zweiten Drehteils (2) bildet und sich im Wesentlichen entlang einer Längsrichtung (X) in der besagten Erweiterungsebene des besagten Körpers erstreckt.
  3. Hemmungsmechanismus (1) nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass das zweite Drehteil (2) angeordnet ist, um eine Drehung des besagten zweiten Drehteils (2) um die besagte Drehachse (Y) in einem Winkel von höchstens 45° zu ermöglichen.
  4. Hemmungsmechanismus (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Auflageelement (242) eine Nut (243) umfasst, die komplementär zu der Kante (241f), die einen Klingendraht der Klinge (241) definiert, ausgebildet ist.
  5. Hemmungsmechanismus (1) nach Anspruch 4, dadurch gekennzeichnet, dass die Nut (243) eine V-Form in einer Ebene senkrecht zur virtuellen Schwenkachse (Y) des zweiten Drehteils (2) aufweist.
  6. Uhr umfassend einen Hemmungsmechanismus (1) nach einem der Ansprüche 1 bis 5.
EP20181985.1A 2019-07-04 2020-06-24 Drehteil für uhrhemmung, entsprechender hemmungsmechanismus und entsprechendes uhrenteil Active EP3761122B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00880/19A CH716389A2 (fr) 2019-07-04 2019-07-04 Mobile d'échappement horloger, mécanisme d'échappement et pièce d'horlogerie.

Publications (2)

Publication Number Publication Date
EP3761122A1 EP3761122A1 (de) 2021-01-06
EP3761122B1 true EP3761122B1 (de) 2023-05-24

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EP20181985.1A Active EP3761122B1 (de) 2019-07-04 2020-06-24 Drehteil für uhrhemmung, entsprechender hemmungsmechanismus und entsprechendes uhrenteil

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EP (1) EP3761122B1 (de)
CH (1) CH716389A2 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2818941A1 (de) * 2010-04-01 2014-12-31 Rolex Sa Blockiervorrichtung für Zahnrad
CH708937B1 (fr) * 2013-12-12 2020-03-31 Richemont Int Sa Elément oscillant pour mouvement horloger.
CH709905A2 (fr) 2014-07-21 2016-01-29 Dominique Renaud Sa Pivot à lame.

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EP3761122A1 (de) 2021-01-06
CH716389A2 (fr) 2021-01-15

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