EP3361324A1 - Timepiece ratchet system - Google Patents

Timepiece ratchet system Download PDF

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Publication number
EP3361324A1
EP3361324A1 EP17155912.3A EP17155912A EP3361324A1 EP 3361324 A1 EP3361324 A1 EP 3361324A1 EP 17155912 A EP17155912 A EP 17155912A EP 3361324 A1 EP3361324 A1 EP 3361324A1
Authority
EP
European Patent Office
Prior art keywords
pawl
1a
tooth
activation
movement
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.)
Pending
Application number
EP17155912.3A
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German (de)
French (fr)
Inventor
Eric Guffond
Thierry MISEREZ
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.)
Montres Rolex SA
Original Assignee
Montres Rolex SA
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 Montres Rolex SA filed Critical Montres Rolex SA
Priority to EP17155912.3A priority Critical patent/EP3361324A1/en
Publication of EP3361324A1 publication Critical patent/EP3361324A1/en
Application status is Pending legal-status Critical

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    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B11/00Click devices; Stop clicks; Clutches
    • G04B11/02Devices allowing the motion of a rotatable part in only one direction
    • G04B11/04Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B5/00Automatic winding up

Abstract

Pawl system (1) for a wheel (2) of a kinematic chain winding a watch cylinder (3) comprising:
- a pawl (10) having at least one tooth (1a) intended to cooperate with a toothing (2a) of the wheel (2); and
an element (6) for activating and deactivating the pawl;
the activation and deactivation element being arranged so that, in a first configuration of the activation and deactivation element, the at least one tooth (1a) of the pawl cooperates with the toothing (2a) directly or indirectly, in particular under the effect of a return force of the at least one tooth (1a) of the pawl against the toothing (2a), and, in a second configuration of the activation and deactivation element, at least one tooth (1a) of the pawl does not cooperate with the toothing (2a) or a return force of the at least one tooth (1a) of the pawl against the toothing (2a) is reduced.

Description

  • The invention relates to a ratchet system for a wheel of a kinematic chain winding a watch cylinder. The invention also relates to a watch movement comprising such a system. The invention also relates to a timepiece comprising such a system or such a movement. The invention finally relates to a method of configuring such a movement or of such a timepiece. The invention also relates to a method of mounting such a movement or such a timepiece. The invention also relates to a method of disassembly of such a movement or of such a timepiece
  • The barrel springs of timepieces with manual or automatic winding are usually kept under tension by means of a pawl which is provided to cooperate with a ratchet mounted square on the barrel shaft. More particularly, the pawl immobilizes the ratchet in the disarming direction of the mainspring and unclips when actuating the manual or automatic winding device.
  • Automatic winding devices are also shaped to immobilize the ratchet in the disarming direction of the spring, so that the ratchet pawl could be removed timepieces provided with such devices. However, there is the problem of disassembly of the automaton which exposes the watchmaker to the problem of uncontrolled undesired unwinding of the mainspring. For this reason, self-winding timepieces known from the prior art also include a device, including a ratchet pawl, for immobilizing the barrel shaft. If such a solution makes it possible in particular to operate the timepiece independently of its PLC module, it is however not optimal as to the efficiency of the automatic winding. Indeed, in this case, the mass oscillating must overcome the resistive torque induced by the ratchet, including the ratchet spring, to allow the automatic winding of the mainspring. Such a construction can therefore be problematic when the ascending power of the oscillating mass is limited according to the dimensions of the timepiece, in particular when it is an automatic movement of small diameter and / or thin .
  • The patent CH542468 discloses a one-piece ratchet pawl having a first rigid portion and a second resilient portion. The rigid part comprises a detent tooth adapted to cooperate with the toothing of the ratchet so as to immobilize the ratchet in the direction of disarming the mainspring, and to disengage from the toothing of the ratchet in the direction of winding of the spring. barrel. For this purpose, the resilient portion of the pawl is in the form of a resilient arm that arrests upon release of the ratchet tooth of the ratchet teeth to ensure the return of the ratchet tooth in the position of locking of the ratchet teeth. In the case where such a device is integrated into a self-winding timepiece, the oscillating weight must overcome the resistive torque induced by the pawl, in particular by the elastic portion of the pawl.
  • There are alternatives to ratchet pawls. The ratchet pawl can for example be substituted for one or more ratchets arranged in one or other of the manual or automatic winding chains. The book "The Swiss automatic winding watch" discloses for example on pages 170 to 174 a unidirectional automatic winding movement without a ratchet pawl, which is known under the reference "Zenith No. 133". In this construction, ratchets integrated within the controller module indirectly immobilize the ratchet in the disarming direction of the mainspring. Such a timepiece can not operate independently of its controller module.
  • There are also alternatives to ratchets. The patent application WO2015193400 discloses, in a third embodiment of the invention, a unidirectional automaton device provided with an oscillating mass pivoted by two radial clutches ball mounted in opposition. A first clutch makes it possible to establish a unidirectional connection between the oscillating mass and the ratchet in a first direction of rotation of the oscillating mass. In a second direction of rotation of the oscillating mass, balls maintain in position the automaton chain and thus ensures the same function as a pawl, in particular a ratchet pawl. Such a configuration advantageously makes it possible to implement a simplified PLC chain whose dead angle is minimized. However, like the aforementioned Zénith caliber, such a timepiece can not function independently of its automaton.
  • The object of the invention is to provide a clock ratchet system to overcome the drawbacks mentioned above and to improve the watch ratchet systems known from the prior art. In particular, the invention proposes a watch ratchet system such that the timepiece that it equips can also operate without a controller module and / or such that the controller module does not have to overcome a resistive torque. induced by a ratchet.
  • A system according to the invention is defined by claim 1.
  • Embodiments of the system are defined by claims 2 to 10.
  • A movement according to the invention is defined by claim 11.
  • Embodiments of the movement are defined by claims 12 to 15.
  • A timepiece according to the invention is defined by claim 16.
  • An embodiment of the timepiece is defined by claims 17.
  • A configuration method according to the invention is defined by claim 18.
  • The appended figures show, by way of example, three embodiments of a timepiece according to the invention.
    • The figure 1 is a schematic view of a first embodiment of a timepiece according to the invention comprising a first embodiment of a clock ratchet system.
    • The figures 2 and 3 are views of the first embodiment of the watch ratchet system in a deactivated configuration.
    • The figure 4 is a view of a PLC module.
    • The Figures 5 and 6 are views illustrating the assembly of the automaton module of the figure 4 to obtain the first embodiment of a timepiece.
    • The figure 7 is a perspective view of a variant of the first embodiment of the clock ratchet system.
    • The figure 8 is a schematic view of a second embodiment of a timepiece according to the invention comprising a second embodiment of a clock ratchet system.
    • The figure 9 is a schematic view of a third embodiment of a timepiece according to the invention comprising a third embodiment of a clock ratchet system.
    • The figure 10 is a partial sectional view of an embodiment of an automaton module preferably used in a watch movement according to the invention.
  • A first embodiment of a timepiece 110 is described below with reference to Figures 1 to 7 . The timepiece is for example a watch, in particular a wristwatch. The timepiece comprises a mechanical movement 100 watch, including an automatic watch movement.
  • Advantageously, the watch movement comprises a frame 99, a watch cylinder 3, a work train and an automaton or automaton device. The controller device may be an automaton module M 'as shown in FIG. figure 4 . By "PLC" or "controller device" is meant, throughout this document, a kinematic chain of automatic winding of the watch cylinder 3 of the movement or part of kinematic chain automatic winding of the watch cylinder 3 of the movement. The kinematic chain portion comprises at least one oscillating mass 5 whose mechanical energy is used to wind the barrel.
  • Preferably, the automaton is bidirectional, and may in particular comprise inverting mobiles 4, 4 '. The two mobile inverters 4, 4 'allow on the one hand the driving of the ratchet by a transmission of movement of the oscillating mass 5 in the winding direction of a mainspring and, on the other hand, the immobilization of the ratchet in the direction of disarming of the mainspring under the effect of the oscillating mass 5 as shown in FIG. figure 3 . Indeed, the kinematic chain of automatic winding movement is irreversible. Thus, the automaton is preferably arranged to immobilize a ratchet or a wheel in a disarming direction of the mainspring. Preferably, the automaton is in the form of an automaton module M ', which comprises for example two blanks M1', M2 'pivoting different workings of the automaton and the oscillating mass 5.
  • The movement comprises a ratchet system for a wheel 2 of the kinematic chain for winding the watch cylinder 3, that is to say a ratchet system for immobilizing a wheel 2 of the kinematic chain winding the watch barrel. 3.
  • The ratchet system includes:
    • a pawl 10 having at least one tooth 1a intended to cooperate with a toothing 2a of the wheel 2; and
    • an element 6 for activating and deactivating the pawl.
  • The activation and deactivation element is arranged so that, in a first configuration of the activation and deactivation element (shown in FIG. figure 1 ), the at least one tooth 1a of the pawl cooperates directly or indirectly with the toothing 2a, in particular by an obstacle and / or under the effect of a return force of the at least one tooth 1a of the pawl against the toothing 2a , and in a second configuration of the activation and deactivation element (shown in FIG. figure 2 ), the at least one tooth 1a of the pawl does not cooperate with the toothing 2a or a return force of the at least one tooth 1a of the pawl against the toothing 2a is reduced, especially reduced compared to the return force from to minus a tooth 1a of the pawl against the toothing 2a in the first configuration.
  • In other words, the activation and deactivation element comprises:
    • a first activation configuration or a first activation position in which the activation and deactivation element causes the activation of the pawl, that is to say that the at least one tooth 1a of the pawl cooperates directly or indirectly with the toothing 2a, in particular by an obstacle and / or under the effect of a return force of the at least one tooth 1a of the pawl against the toothing 2a, and
    • a second deactivation configuration or a second deactivation position in which the activation and deactivation element deactivates the pawl, ie the at least one tooth 1a of the pawl does not cooperate with the toothing 2a or a restoring force of the at least one tooth 1a of the pawl against the toothing 2a is reduced, in particular reduced with respect to the restoring force of the at least one tooth 1a of the pawl against the toothing 2a in the first configuration.
  • In the different embodiments described, preferably, in the second configuration of the activation and deactivation element, the at least one tooth 1a of the pawl does not cooperate with the toothing 2a.
  • Advantageously, the pawl and the barrel ratchet are secured in the first activation configuration or the first activation position of the activation and deactivation element, and the pawl and the barrel ratchet are disengaged in the second configuration. activation or the second deactivation position of the activation and deactivation element.
  • In a first variant of the first embodiment shown on the Figures 1 to 6 , the pawl 10 comprises an assembly element 1c to the frame 99 of the movement 100. The assembly element is preferably at a first end of the pawl. The assembly element comprises for example a conformation such as a heel 1c provided with a first hole for receiving a pin or a pin and a hole for the passage of a screw. The screw passes through the hole and is screwed into a threaded hole in the frame. The pin or pin is partially housed in the frame and in the heel. In the first embodiment, the assembly element is a fastening element to the frame of the movement.
  • The pawl comprises the at least one tooth 1a, including two teeth in this first variant of the first embodiment, remote from the fastener. Preferably, the at least one tooth 1a is disposed at a second end of the pawl. For example, the tooth or the teeth have a profile similar to that of the teeth of the toothing 2a.
  • The pawl further comprises a flexible portion 1b between the fastener 1c and the at least one tooth 1a. This portion has for example an elongated shape such as a stick or an arm. Preferably, in the first activated configuration of the pawl, represented on the figures 1 and 5 , the at least one tooth is recalled in contact with the toothing 2a. More preferably, in this first configuration, the pawl, in particular the flexible portion 1b of the pawl, is slightly prestressed and plates the at least one tooth against the toothing 2a.
  • The ratchet 1 is monostable. Its first position is a position in which the at least one tooth is recalled in contact with the toothing 2a. Thus, the stable position is a position in which the at least one tooth cooperates by obstacle with the toothing 2a and therefore a position in which the pawl prohibits the rotation of the wheel 2, in particular prohibits the rotation of the wheel 2 in the direction of unwinding or disarming the mainspring.
  • In the embodiment shown, the activation and deactivation element is an assembly means 6. This assembly means makes it possible to assemble any device on the movement. Advantageously, the assembly means makes it possible to assemble an automaton, in particular an automaton module M ', on the movement.
  • In the embodiment shown, the assembly means is a screw 6.
  • As seen above, a first configuration of the activation and deactivation element is such that the at least one tooth 1a of the pawl cooperates by obstacle or interference with the toothing 2a and a second configuration of the activation element and deactivation is such that the at least one tooth 1a of the pawl does not cooperate with the toothing 2a or such that the at least one tooth 1a of the pawl is less engaged in the toothing 2a.
  • Advantageously, the first configuration is a first position of the activation and deactivation element and the second configuration is a second position of the activation and deactivation element.
  • Advantageously, as shown on the figure 6 the assembly means has a first portion 6a of a first diameter. This first diameter is such that when the assembly means is in its second position or configuration, the pawl being in contact or in abutment with the first portion, the at least one tooth is at a distance from the toothing 2a or at all less is only partially engaged in the toothing 2a. In this position as represented on the figures 2 and 3 , the pawl is elastically deformed in flexion at its flexible portion 1b.
  • Advantageously, the assembly means has a second portion 6b, in particular a second portion of a second diameter. This second portion is for example threaded and intended to be screwed into a tapping provided on the frame 99, for example on a barrel bridge M1. Preferably, when a watchmaker removes the assembly means, before it is completely removed, the assembly means is in its first position or configuration. In this first position, the pawl is in contact or in abutment against the second portion, the pawl being resiliently biased against this second portion by its flexible portion. It follows that the at least one tooth is returned to a position of obstacle or interference with the toothing 2a, as shown in FIG. figure 1 . On this figure 1 the screw 6 is completely deposited.
  • The first and second portions are advantageously connected by a ramp, in particular by a frustoconical conformation or a chamfer 6c.
  • Of course, the screw 6 could be substituted by a pin attached or made of material on a blank or by an eccentric or by any other means to ensure an assembly. The pin could, for example, be a chamfered cylindrical pin, or a frustoconical pin. More generally, any element projecting from the PLC module could fulfill the function of the screw 6, such as a machining of a blank taking part in the PLC module, or any element attached to the module. PLC.
  • Preferably, the activation and deactivation element and the pawl are arranged so that the at least one tooth of the pawl is displaced relative to the wheel 2, according to the plane of the movement or according to the plane of the wheel 2 when the activation and deactivation element passes from its first position to its second position or when the activation and deactivation element passes from its second position to its first position.
  • However, in a second variant of the first embodiment of the pawl shown in FIG. figure 7 , the assembly means 6 *, here a screw, has a parallel face 6e * or substantially parallel to its cross section and intended to bear against the pawl, in particular at an end close to the at least one tooth 1a. The parallel face 6e * is intended to come to press against the pawl so as to deform elastically, in particular to deform the ratchet elastically in bending, in the second configuration. Thus, in this second variant, the activation and deactivation element and the pawl are arranged so that the at least one tooth of the pawl is displaced relative to the wheel 2, perpendicularly to the plane of the movement or perpendicular to the plane of movement. the wheel 2, when the activation and deactivation element passes from its first position to its second position or when the activation and deactivation element passes from its second position to its first position. In this variant, the screw 6 * is preferably disposed above the arm 1b of the pawl.
  • A second embodiment of a timepiece 110 'is described below with reference to the figure 8 . The timepiece is for example a watch, in particular a wristwatch. The timepiece comprises a 100 'mechanical watch movement, including an automatic watch movement.
  • The movement comprises a ratchet system for a wheel 2 of the kinematic chain winding the watch cylinder 3, that is to say a immobilizer ratchet system of a wheel 2 of the kinematic chain of winding of the watch cylinder 3.
  • This second embodiment differs from the first embodiment in that it comprises a second embodiment of a pawl system 1 '.
  • In the second embodiment, the pawl 10 'comprises an assembly element 1c' to the frame 99 of the movement 100 '. The connecting element is preferably at a first end of the pawl. The assembly element comprises for example a conformation such as a heel 1c 'provided with a hole for passage of an axis. In the second embodiment, the connecting element is a pivoting element intended to pivot the pawl on the frame.
  • As in the first embodiment, the pawl comprises the at least one tooth 1 '' spaced from the connecting element. Preferably, the at least one tooth 1a 'is disposed at a second end of the pawl. In this embodiment, the at least one tooth has the shape of a jumping spout.
  • In contrast to the first embodiment, the pawl comprises a rigid portion 1 of the pivoting element 1c 'and the at least one tooth 1a'. This portion has for example an elongated shape as an arm. This rigid portion does not deform or almost not during normal operation of the ratchet system.
  • Preferably, in the first activated configuration of the pawl, the at least one tooth is biased in contact with the toothing 2a. In this first configuration, the pawl is constrained and plates the at least one tooth in the toothing 2a. This constraint is obtained by an arm elastic 1 b 'ratchet. In the first configuration, the elastic arm is deformed or prestressed bearing against the element 6 'activation and deactivation, which here is a screw 6', including a screw 6 'with a frustoconical portion provided to cooperate with the elastic arm 1b '. In this embodiment, the elastic arm 1b 'spring office is integral with the rigid body 1d' of the pawl. Alternatively, the spring can also be reported. It can be arranged in direct or indirect support against the rigid body.
  • The ratchet 1 'is monostable. Its first position is a position in which the at least one tooth is recalled in contact with the toothing 2a. Thus, this first position is a position in which the at least one tooth cooperates by obstacle with the toothing 2a and therefore a position in which the pawl prohibits the rotation of the wheel 2, in particular prohibits the rotation of the wheel 2 in the direction of unwinding or disarming of the mainspring.
  • A third embodiment of a timepiece 110 "is described below with reference to the figure 9 . The timepiece is for example a watch, in particular a wristwatch. The timepiece includes a 100 "mechanical watch movement, including an automatic watch movement.
  • The movement comprises a ratchet system for a wheel 2 of the kinematic chain for winding the watch cylinder 3, that is to say a ratchet system for immobilizing a wheel 2 of the kinematic chain winding the watch barrel. 3.
  • This third embodiment differs from the first embodiment in that it comprises a third embodiment of a ratchet system 1 ".
  • In the third embodiment, the pawl 10 "differs from the ratchets of the first and second embodiments in that it is made in two components: the ratchet proper 10" and a separate spring 1b ". arranged to apply a force on the ratchet and recall it in its first position.
  • As in the second embodiment, the pawl comprises a rigid portion 1 d "between a pivot member 1c" and the at least one tooth 1a ".This rigid portion does not deform or almost not during normal operation of the ratchet system.
  • Preferably, in the first activated configuration of the pawl, shown in FIG. figure 9 , the at least one tooth is recalled in contact with the toothing 2a. In this first configuration, the pawl is constrained and plates the at least one tooth in the toothing 2a. This constraint is obtained by the action of the spring 1b "This first configuration is obtained in a first activation configuration or a first activation position in which an activation and deactivation element (not shown) causes the activation. of the pawl, that is to say that the at least one tooth 1a "of the pawl cooperates by obstacle with the toothing 2a under the effect of a return force of the at least one tooth 1a" of the ratchet against For example, in this first activation configuration or first activation position, the activation and deactivation element does not act on the spring 1b ".
  • For example again, in a second deactivation configuration or a second deactivation position, the activation and deactivation element causes the pawl to be deactivated or the pawl to be less activated, that is to say that the at least one a tooth 1a "of the ratchet does not cooperate with the toothing 2a or a return force of the at least one tooth 1a "of the pawl against the toothing 2a is reduced.
  • In all the embodiments and variants described, the wheel 2 is a barrel ratchet. However, the wheel 2 can also be any other wheel of the winding chain of the barrel, including the automatic winding chain or the manual winding chain. The wheel could still be part of another chain engaged with the barrel.
  • In all the embodiments and variants described, if the activation and deactivation element is a mounting screw of the PLC module, when the screw is unscrewed during the disassembly of the PLC module, the pawl passes from the second configuration to the first configuration in which the at least one tooth 1a, 1a ', 1a "of the pawl is engaged with the toothing 2a, in particular under the effect of a spring.
  • In all the embodiments and variants described, the activation and deactivation element is an assembly means. Alternatively, the activation and deactivation element may have any other function. The activation and deactivation element can also be dedicated to the only activation and deactivation function. The activation and deactivation element may for example comprise an eccentric.
  • In all the embodiments and variants described, the rigidity of the pawl spring can be inhibited, so as to significantly minimize the resistive torque of the pawl during operation of the controller device. In such a configuration, the pawl is preferably a jumper 1 'as in the second embodiment. In all the embodiments and variants described, the pawl is monostable. Thus, it retracts the teeth 2a against an armed spring during the retraction. The elastic rigidity of the spring can also be inhibited. Restitution or rearming of the spring induces the return to position of the pawl in the first configuration.
  • Alternatively, the pawl may be in the form of a flip-flop, namely a rocker with two stable positions which are defined, for example, by flexible structures, including the buckling of one or more flexible blades. In such a configuration, the state of the flip-flop in its first position or its second position is controlled by the state of the activation and deactivation element.
  • As seen above, the pawl can be a one-piece component as illustrated on the Figures 1, 2 , 7 and 8 or can be an assembly as illustrated by the figure 9 . The pawl can also be a rigid component resiliently biased by a spring as illustrated on the figures 8 and 9 .
  • As seen above, the pawl is provided to cooperate directly with a ratchet wheel 2. By "directly", we mean that the pawl is preferably provided to engage with the teeth of the ratchet. Alternatively, the pawl can cooperate with the teeth of another wheel of the manual winding chain movement, which is engaged with the ratchet wheel. The pawl may, for example, cooperate with the crown wheel which is engaged with the ratchet wheel. In such a case, the operating principle is not modified. Alternatively again, the crown wheel or any other wheel of the manual winding chain which is indexed by such a ratchet may have a degree of freedom so that it can be retracted ratchet teeth under the effect of the PLC module, and more particularly assembly means of the PLC module. For this purpose, such a wheel could, for example, be rotated by an olive pin or a rocker.
  • Whatever the embodiment, the pawl is positioned in its first configuration when the oscillating weight is removed, preferably just before the oscillating weight is removed. In this way, it avoids any risk of inadvertent unwinding of the mainspring. Preferably, the automaton module M 'is designed such that the oscillating mass can not be removed from the movement before the module is withdrawn, and in particular before the unscrewing of a screw whose state controls the state of the pawl. Preferably, in a particular construction, a screw 7 for mounting and dismounting the oscillating mass 5 is not accessible when the PLC module M 'is assembled on the movement. The screw 7 is for example assembled from the underside of the PLC module M 'as shown in FIG. figure 10 .
  • Advantageously, the self-winding watch movement has the particularity of being provided with a detachable or activatable and deactivatable ratchet according to the mounting state of the watch movement. Thus, it is possible to inhibit the function of the pawl when actuating the automatic winding device and to activate the pawl function when the automatic winding device is removed from the movement. Consequently, during the operation of the controller device, the oscillating mass does not have to overcome the resistive torque induced by the pawl, and in particular the pawl spring, to allow the automatic winding of the mainspring. Such a solution is particularly advantageous in view of its simplicity and the expected gains.
  • In a preferred embodiment, the self-winding movement has the particular feature of being provided with an activatable and deactivatable ratchet according to the mounting state of an automaton module M '.
  • In a first configuration or mounting state of the movement corresponding to the watch movement devoid of the PLC module, the pawl is activated so as to immobilize the ratchet in the disarming direction of the mainspring. In operation of the motion devoid of the PLC module, the pawl retracts during reassembly, but is immediately recalled in an interference configuration with a toothing so as to prevent any movement of the toothing in the disarming direction of the barrel.
  • In a second configuration or mounting state of the movement corresponding to the clockwork with the PLC module, the pawl is deactivated so as to avoid interference with a toothing. For example, the at least one tooth of the pawl is out of reach of the toothing so as not to oppose the movement of the oscillating weight in operation of the controller module.
  • In this particular construction, the PLC module M ', in particular the means for mounting the PLC module on the movement, controls the state of the ratchet pawl to configure it in its activated or deactivated state. For example, as previously seen, an assembly screw of the PLC module on the movement may have a specific conformation that allows it to move or to move, particularly in the plane of the frame of the movement, the pawl during assembly and disassembly of the automaton module M '. For this purpose, the screw 6 may have, as previously seen, a body portion 6a shaped so as to come into contact with the pawl when the screw 6 is screwed to the rest of the movement M, in particular on a bridge of barrel M1. Preferably, the screw 6 has at least two distinct portions 6a, 6b which are separated by a chamfer 6c so that the latter constitutes a ramp to allow movement of the pawl, and therefore the removal of at least one tooth 1a , 1a ', 1a "of the toothing 2a, during the screwing of the screw 6. Thus, at the beginning of screwing of the screw 6, the pawl is in a first configuration and, at the end of screwing of the screw 6, the The ratchet is in a second configuration Advantageously, in the second configuration of the activation and deactivation element 6, the mainspring is kept energized by the PLC.
  • The various embodiments relate to a self-winding movement, which has the particular feature of being provided with a detachable or deactivatable ratchet according to the mounting state of a PLC module M '. More generally, the self-winding watch movement has the particularity of being provided with an activatable and deactivatable ratchet according to the mounting state of the watch movement, in particular according to the mounting state of the movement of the watch. watchmaking at the casing. For example, the ratchet may be disabled during the final assembly of the movement within a watch case. The pawl can, for example, be disabled by an element of the box such as the bottom. For example, the bottom may be provided with an anchor which is adapted to cooperate with the pawl so that the latter is retracted from a ratchet toothing once the bottom of the box assembled. Such a design also makes it possible to inhibit or deactivate the pawl when actuating the automatic winding device, and to guarantee the activation of the pawl when the automaton is removed from the movement, once the movement has disengaged. Such a design is particularly suitable for a movement with an oscillating mass not covering the entire movement, for example for a "micro-rotor" type of movement.
  • Optionally, such a device can be further controlled by an additional control, for example by the stem of the watch movement. Thus, the activation and deactivation element can be changed state under the effect of a related device, which is preferably activated by a mechanism at the stem of the watch movement. For example, the activation and deactivation element may have an elastic structure or an additional degree of freedom so that it can retract.
  • Advantageously, a watch movement as described above or a timepiece as described above is configured by implementing at least one of the following steps:
    • Act on the activation and deactivation element of the pawl so as to place it in a first configuration in which the at least one tooth of the pawl cooperates, in particular by obstacle with the toothing and / or under the effect of a restoring force of the at least one tooth of the ratchet against the toothing,
    • Act on the activation and deactivation element of the pawl so as to place it in a second configuration in which the at least one tooth of the pawl does not cooperate with the toothing or in which a return force of the at least a tooth of the pawl against the toothing is reduced, especially reduced compared to the restoring force of the at least one tooth 1a of the pawl against the toothing 2a in the first configuration.
  • Preferably, the first step mentioned above is implemented during a dismantling process of the watch movement or the timepiece.
  • Preferably, the second step mentioned above is implemented during a method of mounting the watch movement or the timepiece.

Claims (18)

  1. System (1; 1 '; 1 ") pawl for a wheel (2) of a kinematic chain winding a watch cylinder (3) comprising:
    - a pawl (10; 10 '; 10 ") having at least one tooth (1a; 1a';1a") intended to cooperate with a toothing (2a) of the wheel (2); and
    an element (6; 6 ') for activating and deactivating the pawl; the activation and deactivation element being arranged so that, in a first configuration of the activation and deactivation element, the at least one tooth (1a; 1a; 1a ") of the pawl cooperates with the teeth (2a) directly or indirectly, in particular under the effect of a return force of the at least one tooth (1a; 1a '; 1a ") of the pawl against the toothing (2a), and, in a second configuration of the activation and deactivation element, the at least one tooth (1a; 1a '; 1a ") of the pawl does not cooperate with the toothing (2a) or a return force of the at least a tooth (1a; 1a '; 1a ") of the pawl against the toothing (2a) is reduced.
  2. System according to the preceding claim, characterized in that the wheel (2) is a ratchet (2).
  3. System according to one of the preceding claims, characterized in that the pawl (10; 10 ') comprises an assembly element (1c; 1c') to a frame (99) of a movement (100, 100 '). , 100 "), in particular at a first end of the pawl and in that the pawl comprises the at least one tooth (1a; 1a ';1a") away from the connecting element, in particular at a second end of the pawl pawl.
  4. System according to the preceding claim, characterized in that the pawl comprises a flexible portion (1b) between the connecting element and the at least one tooth.
  5. System according to claim 3 or 4, characterized in that the connecting element is a fastening element of the pawl to a frame (99) of a movement (100, 100 ', 100 ").
  6. System according to claim 3, characterized in that the pawl comprises a rigid body (1d ', 1d "), in that the connecting element (1 c'; c 1 ') is a pivot member and that the catch comprises a spring (1b '; 1b ") for returning the at least one tooth (1a; 1a', 1a") of the pawl against the tooth system (2a).
  7. System according to the preceding claim, characterized in that the spring is integral with the rigid body or is a spring reported in direct or indirect support against the rigid body.
  8. System according to one of the preceding claims, characterized in that the activation and deactivation element is an assembly means (6; 6 '), in particular a screw (6; 6') or a pin or an eccentric .
  9. System according to one of claims 1 to 7, characterized in that the activation and deactivation element is an eccentric.
  10. System according to claim 8 or 9, characterized in that the activation and deactivation element has a portion or a face parallel or substantially parallel to its cross section intended to bear against the pawl, in particular intended to elastically deform the ratchet, particularly elastically deforming the ratchet in flexion, in the second configuration.
  11. Watch movement (100; 100 '; 100 "), especially automatic watch movement, comprising a ratchet system according to one of the preceding claims.
  12. Watch movement according to the preceding claim, characterized in that it comprises an automaton (M '), in particular an automaton module (M'), and a pawl system according to one of Claims 1 to 10, activating and deactivating element being a means for assembling the automaton, in particular a means for assembling the automaton module, on a blank of the movement, in particular the assembling means being a mounting screw of the module PLC.
  13. Movement according to claim 11 or 12, characterized in that the barrel spring (3) is kept under tension by the automaton in the second configuration of the activation and deactivation element.
  14. Movement according to one of claims 11 to 13, characterized in that the PLC module is a module provided with reversing mobiles.
  15. Movement according to one of claims 11 to 14, characterized in that the pawl (10; 10 ') comprises an assembly element (1c; 1c') to a frame (99) of the movement, in particular at a first end of the pawl and in that the pawl comprises the at least one tooth (1a; 1a '; 1a ") away from the connecting element, in particular at a second end of the pawl.
  16. Timepiece (110; 110 '; 110 "), in particular a wristwatch, comprising a system according to one of Claims 1 to 10 or a movement according to one of Claims 11 to 15.
  17. Timepiece according to the preceding claim, characterized in that the activation and deactivation element is a means of assembling the timepiece, including a means for assembling the movement within the workpiece. watchmaking.
  18. A method of configuring a watch movement according to one of claims 11 to 15 or a timepiece according to one of claims 16 and 17, the method comprising:
    Acting on the activation and deactivation element of the pawl so as to place it in a first configuration in which the at least one tooth of the pawl cooperates directly or indirectly with the toothing, in particular by obstacle and / or under the effect of a return force of the at least one ratchet tooth against the toothing, and / or
    - Act on the activation and deactivation element of the pawl so as to place it in a second configuration in which the at least one tooth of the pawl does not cooperate with the toothing or in which a return force of the less a ratchet tooth against the toothing is reduced.
EP17155912.3A 2017-02-13 2017-02-13 Timepiece ratchet system Pending EP3361324A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17155912.3A EP3361324A1 (en) 2017-02-13 2017-02-13 Timepiece ratchet system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP17155912.3A EP3361324A1 (en) 2017-02-13 2017-02-13 Timepiece ratchet system
JP2018021524A JP2018155737A (en) 2017-02-13 2018-02-09 Horology pawl system
US15/894,133 US20180231934A1 (en) 2017-02-13 2018-02-12 Horology pawl system
CN201810146238.3A CN108427260A (en) 2017-02-13 2018-02-12 Clock and watch detent system

Publications (1)

Publication Number Publication Date
EP3361324A1 true EP3361324A1 (en) 2018-08-15

Family

ID=58018030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17155912.3A Pending EP3361324A1 (en) 2017-02-13 2017-02-13 Timepiece ratchet system

Country Status (4)

Country Link
US (1) US20180231934A1 (en)
EP (1) EP3361324A1 (en)
JP (1) JP2018155737A (en)
CN (1) CN108427260A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1528337A (en) * 1966-07-27 1968-06-07 Centre Electron Horloger electronic timepieces
FR2064452A1 (en) * 1969-10-21 1971-07-23 Centre Electron Horloger
CH542468A (en) 1969-09-15 1973-11-15 Schild Sa A A unidirectional locking of a ratchet wheel in a watch movement
EP1136892A1 (en) * 2000-03-20 2001-09-26 Audemars Piguet (Renaud et Papi) SA Ratcheting drive mechanism for ratchet-wheel in a timepiece winding-mechanism
WO2015193400A1 (en) 2014-06-19 2015-12-23 Rolex Sa Timepiece transmission device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1528337A (en) * 1966-07-27 1968-06-07 Centre Electron Horloger electronic timepieces
CH542468A (en) 1969-09-15 1973-11-15 Schild Sa A A unidirectional locking of a ratchet wheel in a watch movement
FR2064452A1 (en) * 1969-10-21 1971-07-23 Centre Electron Horloger
EP1136892A1 (en) * 2000-03-20 2001-09-26 Audemars Piguet (Renaud et Papi) SA Ratcheting drive mechanism for ratchet-wheel in a timepiece winding-mechanism
WO2015193400A1 (en) 2014-06-19 2015-12-23 Rolex Sa Timepiece transmission device

Also Published As

Publication number Publication date
US20180231934A1 (en) 2018-08-16
CN108427260A (en) 2018-08-21
JP2018155737A (en) 2018-10-04

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