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EP-4740068-A1 - ESCAPEMENT SYSTEM FOR A TIMEPIECE

EP4740068A1EP 4740068 A1EP4740068 A1EP 4740068A1EP-4740068-A1

Abstract

An escapement system (1) for a timepiece, comprising an escape wheel (5) arranged to be driven in rotation by a power source (9), said escape wheel (5) having at least one internal toothset (29, 31) arranged to cooperate with a blocking member (33) and/or to provide impulses for maintaining the oscillations of a regulating member (35) pivotably mounted inside said internal toothset (29, 31), characterized in that said escape wheel (5) further comprises a toothset (7) arranged to be kinematically connected to said power source (9), and in that said escape wheel (5) is pivotably mounted on a support (13) by way of a ball bearing (15), said support (13) being mounted on a frame element (3).

Inventors

  • Corneille, Florian
  • HELD, Christophe

Assignees

  • Greubel Forsey S.A.

Dates

Publication Date
20260513
Application Date
20240701

Claims (11)

  1. 1. Escapement system (1) for a timepiece, comprising an escapement wheel (5) arranged to be driven in rotation by a drive source (9), said escapement wheel (5) having at least one complete internal toothing (29, 31) arranged to cooperate with a blocking member (33) and/or to provide impulses to maintain the oscillations of a regulating member (35) pivotally mounted inside said internal toothing (29, 31), characterized in that said escapement wheel (5) further comprises a toothing (7) arranged to be in kinematic connection with said drive source (9), and in that said escapement wheel (5) is pivotally mounted on a support (13) by means of a ball bearing (15), said support (13) being mounted on a frame element (3).
  2. 2. Exhaust system (1) according to claim 1, wherein said at least one internal tooth (29, 31) is a single internal tooth, said blocking member being an anchor pivotally mounted on said support (13) and arranged to block and release said tooth as well as to provide impulses to said regulating member (35).
  3. 3. Exhaust system (1) according to claim 1, wherein said blocking member (33) is a detent lever (33) pivotally mounted on said support (13) and arranged to cooperate with said at least one internal toothing (31), said regulating member (35) being integral in rotation with an impulse pallet (41) arranged to cooperate either with the internal toothing (31) with which said detent lever (33) cooperates, or with an internal toothing (29) different from that with which said detent lever (33) cooperates.
  4. 4. Exhaust system (1) according to one of the preceding claims, in which said ball bearing (15) comprises an inner annular groove (19) carried directly or indirectly by said support (13), as well as an outer annular groove (17) carried directly or indirectly by said escape wheel (5), said outer groove (17) being located opposite said inner annular groove (19) to define a housing (21) for a plurality of balls (23).
  5. 5. Exhaust system (1) according to one of the preceding claims, in which said support (13) is integral with said frame element (3).
  6. 6. Exhaust system (1) according to one of claims 1 to 4, in which said support (13) is pivotally mounted on said frame element (3) and arranged to be driven in rotation by a drive source (9) at an angular speed different from that of said escape wheel (5).
  7. 7. Escapement system (1) according to the preceding claim, in which said support (13) has a drive toothing (49) arranged to be driven in rotation by said drive source (9) by means of a different mobile (51) than the mobile (11) which is arranged to drive said escapement wheel (5) in rotation.
  8. 8. Exhaust system (1) according to claim 6, wherein said support (13) has a drive toothing (49) arranged to be driven in rotation by said drive source (9), said support (13) carrying a satellite pinion (53) meshing on the one hand with said external toothing (7), on the other hand with a fixed internal toothing (55) which is integral in rotation with a frame element (3).
  9. 9. Escapement system (1) according to one of the preceding claims, in which said regulating member (35) is a balance wheel (35a) - balance spring (35b) oscillator, the axis (39) of rotation of said balance wheel (35a) being oriented in a direction parallel to the axis of rotation of said escapement wheel (5) or in a direction making an angle between 20° and 70°, preferably between 25° and 65°, more preferably between 30° and 60° relative to the axis of rotation of said escapement wheel (5).
  10. 10. Clock movement comprising an escapement system (1) according to one of the preceding claims.
  11. 11. Timepiece comprising a timepiece movement according to the preceding claim.

Description

Description ESCAPEMENT SYSTEM FOR WATCH PIECE Technical field [0001] The present invention relates to the field of watchmaking. It concerns, more particularly, an escapement system for a timepiece. State of the art [0002] The embodiment of figures 3 and 4 of document CH701921 concerns a particular escapement system with two escape wheels, each of which takes the form of an internally toothed crown. This arrangement is illustrated in a relatively hypothetical manner, and the actual development, particularly in terms of the arrangement of the various components, has not been revealed at all. Furthermore, the arrangement revealed concerns a very specific and particular escapement, and does not seem applicable to a conventional anchor or a conventional type detent system. [0003] The aim of the invention is therefore to propose an escapement system for a timepiece in which the aforementioned defects are at least partially overcome. Disclosure of the invention [0004] More specifically, the invention relates to an escapement system for a timepiece, as defined by claim 1. [0005] This system comprises an escapement wheel arranged to be driven in rotation by a driving source such as a mainspring housed in a barrel, an electric motor or the like, said escapement wheel having at least one internal toothing (typically one or two internal toothing(s) depending on the type of escapement chosen) arranged to cooperate with a blocking member (such as a detent lever or an anchor) and/or to provide impulses to maintain the oscillations of a regulating member, such as a balance-spring oscillator. The at least one internal toothing is at least one complete toothing, i.e. comprising a plurality of teeth, typically coplanar for each toothing, regularly distributed around the inner circumference of the escape wheel and without missing a tooth. This regulating member is pivotally mounted inside said internal toothing, in particular directly or indirectly on a support. The impulses are provided either by means of the same internal toothing which cooperates with the blocking lever, or by another internal toothing, and can be carried out either directly by cooperation with an impulse pallet carried by the regulating member, or indirectly via an anchor, if necessary. [0006] According to the invention, said escapement wheel further comprises external or internal teeth arranged to be in direct or indirect kinematic connection with said drive source, typically by means of any gear train, said escapement wheel being pivotally mounted on a support by means of a ball bearing, said support being mounted directly or indirectly on a frame element. By “mounted”, we mean not only a part added to said frame element, but also a support integrated into (and therefore integral with) the latter. Furthermore, the term “mounted” is always to be understood in the broad sense of the term to encompass a direct or indirect assembly, unless explicitly indicated otherwise. [0007] By these means, the escapement system can operate with a large number of known types of escapements, and is capable of being integrated into a clock movement. [0008] In a variant, said at least one internal tooth is a single internal tooth, said locking member being an anchor pivotally mounted on said support and arranged to lock and release said tooth as well as to provide impulses to said regulating member. [0009] In another variant, said locking member is a trigger lever pivotally mounted on said support and arranged to cooperate with said at least one internal toothing, said regulating member being integral in rotation with an impulse pallet arranged to cooperate either with the internal toothing with which said trigger lever cooperates, or with an internal toothing different from that with which said trigger lever cooperates. [0010] Advantageously, said ball bearing comprises an inner annular groove carried directly or indirectly by said support, as well as an outer annular groove carried directly or indirectly by said escape wheel, said outer groove being located opposite said inner annular groove in order to define a housing for a plurality of balls. [0011] In a variant, said support is integral with said frame element, and is therefore immobile. [0012] In another variant, said support is pivotally mounted on said frame element and arranged to be driven in rotation by a drive source (which may be the same drive source as mentioned below or another) at an angular speed different from that of said escape wheel. Thus, the escapement system is in this case of the “carousel” type, the rotation of the support providing a swirl effect to the system. [0013] Advantageously, said support has a drive toothing arranged to be driven in rotation by said drive source by means of a mobile different from that which is arranged to drive said escape wheel in rotation. [0014] In another variant, said support has a drive toothing arranged to be driven in rotation by said drive source, said suppor