EP4544360A1 - Bistabiler uhrsteuermechanismus - Google Patents

Bistabiler uhrsteuermechanismus

Info

Publication number
EP4544360A1
EP4544360A1 EP23738585.1A EP23738585A EP4544360A1 EP 4544360 A1 EP4544360 A1 EP 4544360A1 EP 23738585 A EP23738585 A EP 23738585A EP 4544360 A1 EP4544360 A1 EP 4544360A1
Authority
EP
European Patent Office
Prior art keywords
pivoting part
pivoting
rigid
watch mechanism
bistable
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
EP23738585.1A
Other languages
English (en)
French (fr)
Inventor
Pavel SAVINTCEV
Thibaud Faivre Chalon
Sébastien RUFFIEUX
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.)
LVMH Swiss Manufactures SA
Original Assignee
LVMH Swiss Manufactures 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
Priority claimed from CH000755/2022A external-priority patent/CH719809A2/fr
Application filed by LVMH Swiss Manufactures SA filed Critical LVMH Swiss Manufactures SA
Publication of EP4544360A1 publication Critical patent/EP4544360A1/de
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
    • G04F7/0828—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement acting in the plane of the movement
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
    • G04F7/0852—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms with member having a rotational two-way movement, e.g. navette
    • 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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/04—Rigidly-mounted keys, knobs or crowns
    • G04B3/048—Operation exclusively by axial movement of a push-button, e.g. for chronographs

Definitions

  • the present invention relates to a watch mechanism for a chronograph watch.
  • the present invention also relates to a watch movement comprising such a mechanism, as well as a timepiece, for example a chronograph watch, in particular a wrist chronograph watch, comprising such a mechanism or such a movement.
  • a chronograph watch it is not limited to such an application, but it can also be used for any other watchmaking application which requires the control or actuation of a function, for example and in a non-limiting manner, it can be used in a split-seconds watch mechanism, a minute repeater watch mechanism, a countdown watch mechanism, for example for a regatta watch, etc.
  • a chronograph watch is a time device which allows a duration measurement to be carried out.
  • a chronograph watch includes at least one indicator (such as a hand) which can be started and then stopped, by means of a pusher or other control member, in order to measure a duration. Then it can be returned to its starting point.
  • chronograph watches also feature indicators for displaying the current time in addition to displaying the measured duration.
  • the three phases or functions of a chronograph watch are therefore the start or start, the stop or stop and the reset.
  • the source of energy necessary to set in motion the kinematic chain allowing the measurement of a temporal duration is independent of that of the kinematic chain allowing the current time to be counted and displayed.
  • chronograph watches take the energy necessary for the operation of the part of the movement allowing the measurement of a duration on the kinematic chain allowing the current time to be counted and displayed, i.e. that is to say on the kinematic chain linking a source of energy, for example a barrel, to the regulating organ and to the wheels of the watch, which are linked to the indicators of the watch in order to display the hour, minutes and /or current seconds.
  • a source of energy for example a barrel
  • the clutch mechanisms make it possible to drive the chronograph kinematic chain by the kinematic chain making it possible to count and display the current time.
  • the clutch mechanisms make it possible to start and stop the chronograph kinematic chain very quickly, and also to block it by keeping the chronograph indicator(s) stopped.
  • Known control mechanisms can be for example cam or column wheel.
  • the column wheel is generally manufactured in one piece and includes a ratchet and columns perpendicular to the ratchet.
  • the columns create full and empty spaces in a known manner to control the different movements of the levers which are supported against a column or located between two columns.
  • the levers and their movements which make it possible to carry out the “start”, “stop” and “reset” functions are known in themselves in the technical field and therefore they will not be described here.
  • the cam control mechanism generally comprises two parts at least partially superimposed (also called shuttles), which are integral with each other.
  • the cam allows levers to be controlled to perform functions as does the column wheel.
  • Documents CH716594 and CH716595 propose an alternative to known column wheels which have a relatively large thickness and are difficult to manufacture.
  • the proposed solution is a mechanism comprising a single-layer part capable of rotating (always called a “column wheel” in these documents), elastically linked to a frame and provided with two stable positions relative to the frame, this part being movable between these two stable positions by operating a lever.
  • the lever is connected to the frame by at least one flexible blade, which provides the lever with a preferential position in which it returns automatically after having left it.
  • This mechanism does not have any (rigid) mechanical pivot and it only includes flexible pivots. It includes bistables, even when not mounted in a watch movement. It has a lower thickness than that of known mechanisms. This mechanism does not allow a reset.
  • Document EP3582029 describes a split-seconds mechanism comprising a one-piece split-seconds clip.
  • This clamp includes two branches and an elastic transverse arm deformable in flexion which connects the two branches to each other.
  • This arm is provided at its ends with two pivoting members arranged to rotate around two parallel axes. The two branches can therefore move apart and come together thanks to the elastic transverse arm.
  • the elastic transverse arm undergoes stresses which render its undeformed configuration unstable. In order to find a stable configuration in which stresses are reduced, the elastic transverse arm adopts a buckled or curved shape.
  • a movable part is arranged to cooperate with the elastic transverse arm so that, when a control device is switched, the passage of the movable part from one of its two configurations to the other causes the curvature of the transverse arm to change elastic, which alternately opens and closes the split-seconds clip.
  • the two branches of the split-seconds clamp are arranged to cooperate with a split-seconds wheel so that the split-seconds wheel is immobilized or free to rotate depending on whether the split-seconds clamp is respectively closed or open.
  • the mechanism of document EP3582029 has certain disadvantages: the transverse arm is guided by two pins. The action of these pins in correspondence with the same location of the transverse arm, which is relatively thin, risks damaging or even breaking the transverse arm. In addition, the rotation of the pivoting members (rigid) is caused by the flexion of the arm: this causal link makes the functioning of the mechanism less efficient.
  • Document EP3327518 describes a chronograph mechanism capable of switching between a first state and a second state, comprising, among other things, a first bipolar magnet, a second bipolar magnet having magnetic interaction with the first bipolar magnet, and an element with high magnetic permeability forming a control body.
  • the operation of this mechanism is not entirely mechanical, because it also relies on a magnetic interaction between these components.
  • Document US2019332061 describes a flexible monolithic component for transmitting the movement of an actuator to a driven part.
  • the monolithic component comprises a first rigid drive member fixed to the rigid frame by an elastically flexible structure, and a possible second rigid functional member fixed to the rigid frame by a second elastically flexible structure.
  • An actuating finger slides on a portion of a first rigid drive member generating a movement of the latter controlled by the blades.
  • One end of the rigid hook-shaped drive member constitutes a drive means capable of engaging with the teeth of the driven part.
  • the drive means performs a movement having a component parallel and a component perpendicular to the circumference of the driven part.
  • the entire first drive member performs an alternating two-dimensional oscillation movement, thanks to the elastic deformation of the blades.
  • Document EP3876042 describes a system for resetting a chronograph to zero, comprising a minutes counter having a minutes mobile, and a seconds counter, which includes a chrono mobile.
  • a hammer is kept blocked by a locking means and is movable from an inactive position and an active position.
  • a flexible element connected between a reset control means and the hammer is used for resetting the chronograph to zero, and is configured in such a way as to store energy during a movement of the control means before the hammer is released by the blocking means, to be able to restore this stored energy in measure when the hammer is released, and drive the hammer to reset the chronograph to zero.
  • An aim of the present invention is to propose a watch mechanism free from the limitations of known mechanisms.
  • Another aim of the invention is to propose an alternative watch mechanism to known mechanisms.
  • Another aim of the invention is to propose a watch mechanism which has a reduced number of parts compared to known solutions.
  • Another aim of the invention is to propose a watch mechanism which has a reduced number of wearing parts compared to known solutions.
  • Another aim of the invention is to propose a watch mechanism which can also be used for a reset.
  • Another aim of the invention is to propose a watch mechanism which has a lower risk of breakage compared to known solutions.
  • the invention relates to a mechanism comprising in a main plane:
  • a pivoting part arranged to pivot under the action of the actuating device around an axis perpendicular to the main plane
  • a mechanical pivot having a main axis offset in the main plane relative to the axis of rotation by at least one between the pivoting part and the rigid part, the pivoting part respectively the rigid part being mounted on said mechanical pivot, this which prestresses the first flexible blade and makes the assembly formed by the rigid part and the first flexible blade bistable, so that the pivoting part which rotates causes the movement of the bistable assembly in the main plane, from a first stable position at a second stable position.
  • the flexible blade is not guided, which makes it possible to reduce or even eliminate its risk of breakage.
  • the rotation of the pivoting part causes, via the flexible blade, the movement of the bistable assembly.
  • the input which allows the execution of a function is not the bending of a flexible blade, but the rotation of a (rigid) pivoting part. .
  • This causal link is different from that proposed in the state of the art and allows improved operation of the watch mechanism according to the invention.
  • the watch mechanism also includes:
  • the bistable assembly also comprising the second flexible blade, the bistable assembly moves from a first stable position relative to the frame, in a second stable position relative to the frame.
  • the pivoting part is arranged to also rotate from a first stable position, to a second stable position; when the pivoting part is in its first stable position, the bistable assembly is also in its first stable position and when the pivoting part is in its second stable position, the bistable assembly is also in its second stable position.
  • a stable position is a stable position relative to the frame.
  • the watch mechanism comprises two second preloaded flexible blades, the rigid part being arranged to move in the main plane with a translation movement.
  • the first and/or the second flexible blade(s) comprise openings making it possible to reduce their bending rigidity, to lighten their weight and/or to control their deformation.
  • the rigid part includes openings in order to reduce its inertia and/or in order to activate a function.
  • At least two parts selected from the following parts form a one-piece part: the rigid part, the first flexible blade, the second flexible blade and the frame.
  • the watch mechanism comprises means for fixing the rigid part to the frame, these fixing means comprising pins, screws and/or an additional flexible blade.
  • the watch mechanism comprises a clutch mechanism, in which when the rigid part is in a stable position, it is arranged to activate the clutch mechanism in order to produce a clutch, and when the rigid part is in another stable position, it is arranged to deactivate the clutch mechanism in order to achieve disengagement.
  • the rigid part is arranged to directly activate the clutch mechanism by coming into direct contact with the clutch mechanism.
  • the rigid part is arranged to indirectly activate the clutch mechanism.
  • the clutch mechanism comprises a pin
  • the rigid part comprises a housing arranged to receive the pin, in order to activate the clutch mechanism to produce a clutch.
  • first and/or the second flexible blade(s) are substantially perpendicular to the main plane. [0044] In one embodiment, the second flexible blades are parallel to each other.
  • the rigid part comprises a clamp-shaped or U-shaped body.
  • the rigid part comprises a body in a substantially polygonal or substantially rectangular shape.
  • the clutch mechanism comprises a first clamp portion, a second clamp portion, each clamp portion being arranged to pivot around an axis of rotation, the first clamp portion comprising said pin, the second plier portion comprises a flexible blade, one end of which is linked to a hole in the frame.
  • the rigid part is a first rigid part
  • the actuation device is a first actuation device
  • the watch mechanism comprising:
  • a second rigid part in which the second rigid part is arranged to move in a second plane under the action of the second actuating device, from a first stable position (relative to the frame), to a second stable position ( relative to the frame), the movement of the second rigid part making it possible to perform a function, for example a reset function.
  • the pivoting part is a first pivoting part
  • the watch mechanism comprising:
  • the second plane is parallel to the main plane.
  • the watch mechanism comprises a heart, the second rigid part comprising at least one hammer portion, in order to actuate the heart.
  • the invention relates to a watch mechanism comprising:
  • the first rigid part is arranged to move in a first plane under the action of the first actuating device, from a first stable position (relative to the frame), to a second stable position (by relative to the frame), by activating or performing a first function
  • the second rigid part is arranged to move in a second plane substantially parallel to the first plane under the action of the second actuation device, from a first stable position ( relative to the frame), at a second stable position (relative to the frame), by activating or performing a second function different from the first.
  • the first function is a clutch, and in which the second function is a reset.
  • the watch mechanism comprises in the first plane:
  • first pivoting part arranged to pivot under the action of the first actuating device around a first axis perpendicular to the first plane
  • the watch mechanism comprises in the second plane:
  • the first axis is the second axis.
  • the first rigid part is at least partially superimposed on the second rigid part.
  • the first pivoting part is at least partially superimposed on the second pivoting part.
  • the watch mechanism comprises a heart, the second rigid part comprising at least one hammer portion, in order to actuate the heart.
  • the watch mechanism comprises a locking part, to lock the second actuating device.
  • the locking part comprises a stopper
  • the second actuating device comprising a housing arranged to receive the stopper, thus providing locking.
  • the locking part comprises a first and a second rigid portion, connected together by one or more flexible blades.
  • the watch mechanism comprises an intermediate part, arranged to cooperate with the second actuating device in order to move the second rigid part.
  • the intermediate part is arranged to come into contact with the second actuating device and to rotate following this contact around its axis of rotation.
  • the intermediate part comprises a first pin, arranged to be received in an opening created by the at least partial superposition of an opening of the first rigid part with a second opening of the second rigid part, and a second pin which is arranged to cooperate with a hammer portion of the second rigid part.
  • the invention relates to a watch mechanism comprising:
  • a first pivoting part arranged to cooperate with the first actuating device and to pivot around a first axis perpendicular to a first main plane
  • a second pivoting part arranged to be linked to the first pivoting part and to pivot around a second axis perpendicular to a second main plane
  • a mechanical pivot having a main axis offset in the first main plane and/or in the second main plane relative to the axis of rotation of the first pivoting part and the second pivoting part, the first pivoting part and the second part pivoting being mounted on said mechanical pivot, which prestresses the first flexible blades.
  • the watch mechanism comprises:
  • the first pivoting part is arranged to rotate from a first stable position relative to the frame to a second stable position relative to the frame, under the action of the first actuating device and the first blade connected to the first pivoting part, the second pivoting part is arranged to rotate from a first stable position relative to the frame to a second stable position relative to the frame, under the action of the first actuator or the second actuator, and under the action of the first blade connected to the second pivoting part.
  • the first pivoting part is at least partially superimposed on the second pivoting part.
  • the first axis is the second axis.
  • the first pivoting part or the second pivoting part is in one piece.
  • the watch mechanism is arranged so that at least for one function of the watch mechanism, when the first pivoting part rotates, the second pivoting part remains stationary and vice versa.
  • the first pivoting part comprises a pin on said pivot
  • the second pivoting part comprises an opening, the pin being arranged to move in the opening.
  • each pivoting part comprises an interaction portion, arranged to interact with the first actuation device.
  • the second pivoting part comprises a reset portion arranged to cooperate with the second actuation device.
  • the watch mechanism comprises a third pivoting part, which is superimposed on the second part pivoting, the second pivoting part being sandwiched at least partially between the first pivoting part and the third pivoting part.
  • the first pivoting part comprises a pin mounted on said pivot
  • the third pivoting part comprises an opening arranged to receive a free end of the pin of the first pivoting part.
  • the second pivoting part comprises an end, which is arranged to cooperate with the pin of the first pivoting part.
  • the watch mechanism comprises a (second) pin connecting the first, the second and the third pivoting part.
  • the watch mechanism comprises a rocker pusher, in which in particular the first actuation device comprises a spring connected to the rocker pusher.
  • the first respectively second pivoting part comprise through openings, the second pin being inserted into these through openings and one of its ends also being received in a through opening of the rocker pusher.
  • the rigid part is arranged to move in the main plane with a rotational movement.
  • the rigid part comprises a pin and the clutch mechanism comprises a housing arranged to receive the pin, in order to activate the clutch mechanism to achieve clutching.
  • the second rigid part is arranged to move in a second plane different from the main plane, for example parallel to the main plane.
  • the second rigid part is arranged to move in the main plane.
  • the first pivoting part comprises a pin arranged to cooperate with the second pivoting part, in particular to come into contact with the second pivoting part and make it pivot around its axis.
  • Figure 1 illustrates a perspective view of an embodiment of the watch mechanism according to the invention.
  • Figure 2 illustrates a perspective view of another embodiment of the watch mechanism according to the invention.
  • Figure 4 illustrates a top view of an embodiment of the watch mechanism according to the invention, in the starting phase.
  • Figure 5 illustrates a top view of the embodiment of the watch mechanism of Figure 4, in the stopping phase.
  • Figure 6 illustrates a top view of the embodiment of the watch mechanism of Figures 4 and 5, in the reset phase.
  • Figure 7A illustrates a perspective view of a part of the watch mechanism according to one embodiment of the invention, in the phase preceding the starting phase.
  • Figure 7B illustrates a perspective view of the part of the watch mechanism of Figure 7A, in the starting phase.
  • Figure 7C illustrates a perspective view of the part of the watch mechanism of Figure 7A, in the stopping phase.
  • Figure 7D illustrates a perspective view of the part of the watch mechanism of Figure 7A, in the reset phase.
  • Figure 8 illustrates a perspective view of the first bistable of the watch mechanism according to another embodiment of the invention.
  • Figure 9 illustrates a perspective view of the second bistable of the watch mechanism according to another embodiment of the invention.
  • Figure 10 illustrates a perspective view of the first bistable of Figure 8 and the second bistable of Figure 9.
  • Figure 11 illustrates a perspective view of the assembly of the first bistable and the second bistable of Figure 10, with a first device for actuating the watch mechanism according to another embodiment of the invention.
  • Figure 12A illustrates a top view of the watch mechanism according to another embodiment of the invention, in the phase preceding the starting phase.
  • Figure 12B illustrates a bottom view of the watch mechanism of Figure 12A.
  • Figure 13A illustrates a top view of the watch mechanism of Figure 12A, in the starting phase.
  • Figure 13B illustrates a bottom view of the watch mechanism of Figure 13A.
  • Figure 14A illustrates a top view of the watch mechanism of Figure 12A, in the stopping phase.
  • Figure 14B illustrates a bottom view of the watch mechanism of Figure 14A.
  • Figure 15A illustrates a top view of the watch mechanism of Figure 12A, in the reset phase.
  • Figure 15B illustrates a bottom view of the watch mechanism of Figure 15A.
  • Figure 16A illustrates a view from above of a portion (bistable for starting and/or stopping) of the watch mechanism according to one embodiment, in which the flexible blades are not pre-stressed.
  • Figure 16B illustrates a top view of the mechanism of Figure 16A in which the flexible blades are pre-stressed.
  • Figure 16C is a superposition of Figures 16A and 16B.
  • Figure 17A illustrates a view from above of another portion (bistable for resetting) of the watch mechanism according to one embodiment, in which the flexible blades are not pre-stressed.
  • Figure 17B illustrates a top view of the mechanism of Figure 17A in which the flexible blades are pre-stressed.
  • Figure 17C is a superposition of Figures 17A and 17B.
  • Figure 18A illustrates a view from above of a portion (bistable for starting and/or stopping) of the watch mechanism according to another embodiment, in which the flexible blades are not pre-stressed.
  • Figure 18B illustrates a top view of the mechanism of Figure 18A in which the flexible blades are pre-stressed.
  • Figure 18C is a superposition of Figures 18A and 18B.
  • Figure 19A illustrates a view from above of another portion (bistable for resetting) of the watch mechanism according to another embodiment, in which the flexible blades are not pre-stressed.
  • Figure 19B illustrates a top view of the mechanism of Figure 19A in which the flexible blades are pre-stressed.
  • Figure 19C is a superposition of Figures 19A and 19B.
  • Figure 20A illustrates a view from above of a portion (bistable for starting and/or stopping) of the watch mechanism according to one embodiment, in which the flexible blades are not pre-stressed.
  • Figure 20B illustrates a top view of the bistable of Figure 20A in which the flexible blades are pre-stressed.
  • Figure 20C is a superposition of Figures 20A and 20B.
  • Figure 21 A illustrates a view from above of a portion (bistable for resetting) of the mechanism according to another embodiment, in which the flexible blade is not pre-stressed.
  • Figure 21 B illustrates a top view of the bistable of Figure 21A in which the flexible blade is pre-stressed.
  • Figure 21C is a superposition of Figures 21A and 21B.
  • Figure 22A illustrates a top view of a mechanism according to another embodiment, in the phase preceding that of departure.
  • Figure 22B illustrates a bottom view of the mechanism of Figure 22A.
  • Figure 23A illustrates a top view of the mechanism of Figure 22A, in the reset phase.
  • Figure 23B illustrates a bottom view of the mechanism of Figure 23A.
  • Figure 24A illustrates a top view of the mechanism of Figure 22A, in the starting phase.
  • Figure 24B illustrates a bottom view of the mechanism of Figure 24A.
  • Figure 25A illustrates a top view of the mechanism of Figure 22A, in the stopping phase.
  • Figure 25B illustrates a bottom view of the mechanism of Figure 25A.
  • Figure 26A illustrates a perspective view of a portion of the mechanism of Figure 22A, in the phase preceding that of departure.
  • Figure 26B illustrates a perspective view of a portion of the mechanism of Figure 22A, in the reset phase.
  • Figure 26C illustrates a perspective view of a portion of the mechanism of Figure 22A, in the starting phase.
  • Figure 26D illustrates a perspective view of a portion of the mechanism of Figure 22A, in the stopping phase.
  • the expression “flexible blade” designates a blade or a beam, arranged to deform elastically in a main plane of the watch mechanism according to the invention, for example according to a bending movement.
  • the term “bistable” designates a watch component arranged to occupy two stable positions relative to a frame of the watch mechanism according to the invention, and which can be moved between these two stable positions.
  • the adjective “rigid” indicates that the component to which this adjective refers is not intended to be deformed during the operation of the watch mechanism according to the invention, and it has a rigidity higher than that of flexible blades.
  • FIG. 1 illustrates a perspective view of an embodiment of the watch mechanism 1000 according to the invention.
  • the watch mechanism 1000 belongs to the main xy plane and includes:
  • actuation device 6 for example an actuation device 6 for the start and stop phases
  • a pivoting part 3 arranged to pivot under the action of the first actuating device 6 around an axis z perpendicular to the plane main xy,
  • a locking part 8 arranged to activate or prevent - as will be seen - the resetting of the indicator associated with the heart 200 via a second actuation device 9.
  • the locking part locking 8 is arranged to lock the second actuating device 9, for example in the starting phase.
  • the assembly of the first rigid part 1, the first flexible blade 5A, and at least one second flexible blade 5B forms a first bistable.
  • the watch mechanism 1000 comprises a mechanical pivot (not illustrated) having a main axis offset in the main xy plane relative to the axis of rotation of the pivoting part 3 in a non-prestressed or initial state, the pivoting part 3 being mounted on this mechanical pivot.
  • the pin 34 visible in Figure 1 is mounted on this pivot.
  • the main axis of the pivot corresponds to the main axis of the pin 34. The presence of this pivot guarantees the prestressing of the flexible blades 5A, 5B.
  • the pivoting part 3 therefore pivots around the mechanical pivot, which in the illustrated embodiment is fixed relative to the frame 7.
  • Figure 16A illustrates a view from above of the pivoting part 3, of the frame 7, of the first rigid part 1, of the first flexible blade 5A and of the two second flexible blades 5B, the flexible blades 5A and 5B n 'being not prestressed.
  • Figure 16B illustrates a top view of the mechanism of Figure 16A in which the flexible blades 5A and 5B are pre-stressed, because the pivoting part 3 is mounted on a mechanical pivot (not illustrated) having a main axis offset in the main plane xy relative to the axis of rotation of the pivoting part 3 in a non-prestressed state (that of Figure 16A), the position of the frame 7 being the same in the non-prestressed state ( Figure 16A) and prestressed (figure 16B).
  • Figure 16C which is a superposition of Figures 16A and 16B, illustrates the offset di between the two axes of rotation. In one embodiment, the offset di is less than one tenth of the length of the shortest flexible blade 5A, 5B.
  • the pivoting of the pivoting part 3 causes a deformation of the flexible blades 5A and 5B.
  • This deformation causes a movement (by translation in the case of Figure 1) of the first rigid part 1, and after this movement a function (the start or stop of a chronograph in the case of Figure 1) is executed .
  • a function the start or stop of a chronograph in the case of Figure 1.
  • the pivoting part 3 also rotates from a first stable position relative to the frame 7, to a second stable position relative to the frame 7.
  • the bistable assembly when the pivoting part 3 is in its first stable position, the bistable assembly is also in its first stable position and when the pivoting part 3 is in its second stable position, the bistable assembly is also in its second stable position.
  • the assembly formed by the rigid part 1, the flexible blades 5A, 5B and the first pivoting part 3 is also a bistable assembly.
  • the first actuation device 6 of the watch mechanism 1000 moves, for example with a rotational and/or translational movement, under the action of a user of the watch (for example a wristwatch) comprising the watch mechanism 1000. Its movement causes the pivoting around the z axis of the pivoting part 3 of the watch mechanism 1000.
  • the pivoting part 3 is therefore an interaction part, because it interacts, directly or indirectly, with the first actuating device 6.
  • the actuating device 6 can for example be in one piece or comprise several components, connected together with removable or non-removable connecting means.
  • the actuating device 6 may for example comprise flexible blades or be devoid of such blades.
  • the actuating device 6 can for example move with a rotational and/or translational movement.
  • the adjective “monobloc” indicates that the component to which this adjective refers is produced in a monolithic manner.
  • the actuating device 6 is in one piece and comprises a main body 60, in particular a rigid main body, which is connected on one side and on the other to two flexible blades 61, 62.
  • each flexible blade has an “S” shape and ends with an end 64 respectively 65 in correspondence of which the actuating device 6 is connected to a frame (not illustrated ).
  • the first actuating device 6 of Figure 1 moves with a roto-translation movement.
  • the actuating device 6 comes into direct contact with the first pivoting part 3.
  • it comprises a contact portion 63 in the form of a projection, which comes into contact with the first pivoting part 3.
  • direct contact between the actuating device 6 and the first pivoting part 3 is not essential, provided that the actuating device 6 causes (directly or indirectly) the pivoting of the pivoting part 3 around the z axis.
  • the watch mechanism according to the invention could also operate with a single flexible blade 5B.
  • the presence of two second flexible blades 5B makes it possible to better control the movement of the first rigid part 1, which in particular performs a translational movement in the principal xy plane, particularly along the y direction.
  • Each flexible blade 5A and 5B is pre-stressed, i.e. it is deformed during its assembly in the watch mechanism 1000, for example visible in Figure 3A, which illustrates a top view of a part of a watch mechanism 1000 according to one embodiment of the invention, at rest, in a first stable position.
  • the prestressing of each flexible blade 5A and 5B is linked to the presence of the mechanical pivot having a main axis offset in the main xy plane relative to the axis of rotation of the pivoting part 3.
  • each flexible blade 5A and 5B is prestressed by deforming it in the xy plane.
  • the movement of the first rigid part 1 also causes a deformation of the flexible blades 5A and 5B, which allows both to the first rigid part 1 and to the pivoting part 3, as well as to each flexible blade 5A and 5B, to move from a first stable position to a second stable position, illustrated in Figure 3B.
  • the first rigid part 1 passes from the first stable position of Figure 3A to the second stable position of Figure 3B with a translation movement in the direction of arrow B, thanks to the presence of two second flexible blades 5B.
  • the pivoting part 3 passes from the first stable position of Figure 3A to the second stable position of Figure 3B with a rotational movement in the direction of arrow A.
  • each flexible blade 5A and 5B has a height in a direction parallel to the z axis, which is at least five times greater than its thickness in the xy plane, and which is at least ten times smaller than its length in a direction substantially parallel to the x axis.
  • the aspect ratio of each flexible blade 5A and 5B defines its flexibility in the plane of interest.
  • Each flexible blade 5A and 5B can be substantially perpendicular to the main plane xy, namely its height can be substantially perpendicular to the main plane xy, as illustrated in the embodiment of Figure 1.
  • the first flexible blade 5A in particular its first end 50A which is connected to the first rigid part 1, can also be substantially perpendicular to a first lateral surface 15A of the first rigid part 1.
  • it can form an angle a which at rest belongs to the range 80°-100°, in particular to the range 85°-95°, for example to the range 87°-93°, as illustrated in the embodiment of Figure 1.
  • This inclination introduces a asymmetry in the behavior of the bistable assembly formed by the rigid part 1 and the blades 5A, 5B.
  • perpendicularity a substantially equal to 90°
  • the stroke of the bistable assembly during its translation movement is the same independently of the direction of movement.
  • the stroke is no longer the same if the bistable assembly passes from a first stable position to a second stable position relative to the opposite direction (namely, when the bistable assembly passes from the second stable position towards the first stable position).
  • the total travel between the stable position and the moment of jump (the moment of change of state, when the mechanism has a tendency to go towards the other stable position and not go back), i.e. the total travel between the two stable positions remains substantially the same.
  • the first flexible blade 5A can be connected to the first rigid part 1 in correspondence of a non-central (or peripheral) position of the first lateral surface 15A of the first rigid part 1, as illustrated in the embodiment of Figure 1.
  • the first flexible blade 5A also comprises a second end 51A, opposite the first end 50A, which is connected to the pivoting part 3. [00117]
  • the first flexible blade 5A can be a separate part from the pivoting part 3 and the first rigid part 1 and it is connected to the pivoting part 3 respectively to the first rigid part 1 with means known, removable or immovable connections.
  • the first flexible blade 5A can form a single piece with the pivoting part 3 and/or the first rigid part 1.
  • the watch mechanism 1000 comprises two (or more) first flexible blades 5A. In one embodiment (not illustrated), at least some of these first flexible blades 5A are parallel to each other.
  • the watch mechanism comprises two (or more) second flexible blades 5B, at least some of these second flexible blades 5B are parallel to each other, as illustrated for example in Figure 1.
  • Each second flexible blade 5B in particular its end 50B which is connected to the first rigid part 1, can also be substantially perpendicular to a second lateral surface 15B of the first rigid part 1. In particular, it can form an angle 0 which at rest belongs to the range 80°-100°, in particular to the range 85°-95°, for example to the range 87°-93°, as illustrated in the embodiment of Figure 1.
  • Each second flexible blade 5B can be connected to the first rigid part 1 in correspondence with a peripheral position of the second lateral surface 15B of the first rigid part 1, as illustrated in the embodiment of Figure 1.
  • Each second flexible blade 5B also comprises a second end 51 B, opposite the first end 50B, which is connected to a frame 7.
  • the second flexible blade 5B can be a separate part from the first rigid part 1 and the frame 7, and connected to the first rigid part 1 respectively to the frame 7 with known, removable connection means or immovable.
  • the second flexible blade 5B can form a single piece with the first rigid part 1 and/or the frame 7.
  • the flexible blades 5A and/or 5B comprise one or more recesses or (through) openings 55A respectively 55B, for example in the xz plane, making it possible to reduce their bending rigidity (and therefore the constraints in the material), to lighten their weight and/or to (better) control their deformation.
  • these openings have a rectangular or polygonal shape, but any other shape can be considered.
  • the watch mechanism 1000 comprises two or more first flexible blades 5A in series, and (at least) one additional rigid part (not illustrated) connecting two first consecutive flexible blades 5A. In a variant, all of the first flexible blades 5A and the additional rigid part(s) form a single piece.
  • the watch mechanism 1000 comprises several second flexible blades 5B in series, and (at least) one additional rigid part (not illustrated) connecting two consecutive second flexible blades 5A.
  • all of the second flexible blades 5A and the additional rigid part(s) form a single piece.
  • the watch mechanism 1000 comprises a clutch mechanism 100.
  • this clutch mechanism 100 is a clutch mechanism comprising a wheel 101 returning the clutch and a flange 102
  • this embodiment should not be considered limiting: the watch mechanism 1000 may comprise another type of clutch mechanism 100, for example a horizontal clutch mechanism, with an oscillating pinion, etc.
  • the clutch mechanism 100 is coaxial with a core 200, linked to an indicator member (not illustrated), for example a member indicating a timed time.
  • the first rigid part 1 when the first rigid part 1 is in a first stable position, it activates the clutch mechanism in order to produce a clutch, and when it is in a second stable position, it deactivates the mechanism clutch in order to disengage.
  • the first rigid part 1 allows the activation of the start/stop functions. In particular, the functions of start/stop are carried out after the movement of the first rigid part 1.
  • the activation of the clutch mechanism 100 by the first rigid part 1 can be carried out in different ways, directly or indirectly, for example and in a non-limiting manner by contact, pinching, movement, etc.
  • the body 10 of the first rigid part 1 can be in the shape of a clamp or a U, as in the example illustrated in Figure 1. This shape does not necessarily imply that the first rigid part 1 grips the mechanism d clutch 100 in order to activate it.
  • the watch mechanism comprises several clutch mechanisms 100 and the first rigid part 1 is arranged to activate these clutch mechanisms.
  • the first rigid part 1 comprises one or more recesses or (through) openings, for example openings in the xy plane, in order to reduce its inertia and/or in order to activate a function.
  • these openings have a rectangular or polygonal shape, but any other shape can be considered.
  • the first rigid part 1 may comprise (at least) a projection 18 which can cooperate with the first rigid portion 81 of the locking part 8.
  • the stopper 80 belongs to the part of locking 8, arranged to lock the second actuating device 9, as will be seen later.
  • the first rigid part 1 is a one-piece part. [00140] In one embodiment, the first rigid part 1 forms with the first flexible blade 5A and/or the second flexible blade 5B a one-piece part.
  • the frame 7 may comprise one or more (through) holes 70, in order to fix it to a bridge or to a plate of a movement comprising the watch mechanism 1000 according to the invention, for example via screws (not illustrated in Figure 1).
  • the frame 7 can be fixed to a bridge or to a plate with other fixing means, for example via one or more pins, for example pins on pivots (not shown).
  • the use of pivots makes it possible to reduce the stresses in the blades 5A, 5B which are high and can cause mechanical breakage. It also makes it possible to increase the thicknesses of the blades 5A, 5B, while keeping the stresses acceptable and therefore the force either to actuate the clutch or to return the core 200 to its initial position.
  • the frame 7 can be fixed to a bridge or to a plate for example also via one or more additional flexible blades (not illustrated), placed between the blades 5A and/or 5B and the frame 7, which also make it possible to reduce the stresses in the material of the blades 5A, 5B when moving from one stable position to another, which makes it possible to widen the blades 5A, 5B in the xy plane, in order to increase the force of the bistable assembly to activate functions more easily and/or improve shock resistance.
  • these additional flexible blades form an angle different from 180° with the blades 5A and/or 5B.
  • the locking part 8 may comprise a first rigid portion 81 and a second rigid portion 82, connected together by one or more flexible blades 83.
  • the stopper 80 may belong to a rigid portion, for example to the first rigid portion 81, as illustrated in Figure 1. In the case where the two rigid portions 81, 82 are connected by two or more flexible blades 83, at least some can be parallel, as illustrated in Figure 1.
  • Figure 2 illustrates a perspective view of another embodiment of the watch mechanism 1000 according to the invention, comprising, in addition to the components illustrated in Figure 1:
  • a second pivoting part 4 connected with the first pivoting part 3 (for example via a pin 34 mounted on the pivot according to the invention), and arranged to also pivot around an axis z,
  • a second actuation device 9 for example an actuation device for resetting the indicator associated with the heart 200.
  • the assembly of the second rigid part 2 and the flexible blades 5A', 5B' forms a second bistable assembly.
  • the second pivoting part 4 is also mounted on the same mechanical pivot of the first pivoting part 3, and the main axis of the mechanical pivot (which can correspond to the main axis of the pin 34 ) is offset in the x'y' plane also with respect to the axis of rotation of the second pivoting part 4 in a non-prestressed or initial state.
  • the axis of rotation of the second pivoting part 4 corresponds to the axis of rotation of the first pivoting part 3. This guarantees the prestressing of both the flexible blades 5A', 5B' .
  • FIG. 17A illustrates a view from above of the pivoting part 4, of the frame 7', of the second rigid part 2, of the first flexible blade 5A' and of the two second flexible blades 5B', the flexible blades 5A ' and 5B' not being prestressed.
  • Figure 17B illustrates a top view of the mechanism of Figure 17A in which the flexible blades 5A' and 5B' are pre-stressed, because the pivoting part 4 is mounted on a mechanical pivot (not illustrated) having a main axis offset in the main xy plane relative to the axis of rotation of the pivoting part 4 in a non-prestressed state (that of Figure 17A), the position of the frame 7' being the same in the non-prestressed state ( figure 17A) and prestressed (figure 17B).
  • Figure 17C which is a superposition of Figures 17A and 17B, illustrates the offset d2 between the two axes of rotation. In one embodiment, the offset d2 is less than one tenth of the length of the shortest flexible blade 5A', 5B'.
  • the second pivoting part 4 also rotates from a first stable position relative to the frame 7, to a second stable position relative to the frame 7.
  • the bistable assembly formed by the second rigid 2 and the blades 5A', 5B' is also in its first stable position and when the second pivoting part 4 is in its second stable position, this bistable assembly is also in its second stable position.
  • the assembly formed by the second rigid 2, the blades 5A', 5B' and the second pivoting part 4 is also a bistable assembly.
  • the flexible blades 5A and 5B, the first rigid part 1, the first pivoting part 3 and the first frame 7, as well as the flexible blades 5A' and 5B', the second rigid part 2, the second pivoting part 4 and the second frame 7' all belong to the same xy plane.
  • the first bistable set and the second bistable set are coplanar.
  • the first bistable assembly and the second bistable assembly belong to two planes inclined relative to each other.
  • the first bistable set and the second bistable set belong to two parallel planes, xy and x'y'.
  • the x'y' plane is above the xy plane, this embodiment is not limiting and in another embodiment (not illustrated), the x'y' plane can be below the xy plane.
  • the xy plane is that of a first planar plate and the x'y' plane is that of a second planar plate.
  • each of the first plate and the second plate can be produced by photolithography from a wafer, for example a silicon wafer, by laser cutting, by LIGA (for “Rôntgenlithographie, Galvanoformung und Abformung”), etc.
  • at least one between the first plate and the second plate is made of a composite material comprising a forest of juxtaposed nanotubes held by a matrix.
  • the nanotubes are carbon nanotubes.
  • the matrix comprises amorphous carbon.
  • the nanotubes are made of other materials, for example boron nitride (“boron nitride nanotubes”, BNNT) or silicon.
  • At least one between the first plate and the second plate is made of steel.
  • at least one between the first plate and the second plate is made of glass, sapphire or alumina, of diamond, in particular of synthetic diamond (in particular synthetic diamond obtained by a chemical vapor deposition process), made of titanium, of a titanium alloy (in particular an alloy of the Gum metal (R) family) or an alloy of the elinvar family, in particular Elinvar (R), Nivarox (R), Thermelast (R) , the Nl-Span-C (R) and the Precision C (R), in shape memory alloy, in particular Nitinol, or in plastic.
  • a titanium alloy in particular an alloy of the Gum metal (R) family
  • an alloy of the elinvar family in particular Elinvar (R), Nivarox (R), Thermelast (R) , the Nl-Span-C (R) and the Precision C (R)
  • shape memory alloy in particular Nitinol, or in plastic.
  • the second pivoting part 4 is arranged to rotate under the action of the first actuating device 6, so as to deform the first blade 5A' and the second blade 5B', by moving in the plane x'y' the second bistable (namely the second rigid part 2, as well as each flexible blade 5A' and 5B'), from a first stable position relative to the second frame 7', to a second stable position relative to the second frame 7', by carrying out a second function, different from the first carried out by the movement of the first bistable (namely the first rigid part 1 and the blades 5A, 5B).
  • the movement of the first bistable allows the activation of a clutch and the movement of the second bistable allows the resetting to zero of an indicator member associated with the heart 200.
  • the second bistable set remains stationary and vice versa.
  • at stop only the first bistable assembly moves and at reset, only the second bistable assembly moves.
  • the second bistable assembly when the first bistable assembly moves, the second bistable assembly also moves. In one embodiment, at start, the two bistable sets move.
  • the second pivoting part 4 when the first pivoting part 3 rotates, the second pivoting part 4 remains stationary and vice versa. In one embodiment, at stop, only the first pivoting part 3 moves and at reset, only the second pivoting part 4 moves.
  • the first pivoting part 3 rotates, the second pivoting part 4 also moves.
  • the two pivoting parts 3, 4 move.
  • the first rigid part 1 is at least partially superimposed on the second rigid part 2, as illustrated for example in FIG. another embodiment (not illustrated), the first rigid part 1 is not superimposed on the second rigid part 2.
  • the first flexible blade 5A is at least partially superimposed on the first flexible blade 5A', and/or the second flexible blade 5B is at least partially superimposed on the second flexible blade 5B'.
  • the body 20 of the second rigid part 2 also has a U shape similar to that of the first rigid part 1, in other embodiments, it does not It doesn't have the same or similar shape. In other embodiments, it also does not have the same or similar dimensions.
  • the first flexible blade 5A has a shape and dimensions similar to those of the flexible blade 5A', in other embodiments the first two blades 5A and 5A ' do not have equal or similar shape or dimensions.
  • the second flexible blades 5B have a shape and dimensions similar to those of the flexible blades 5B', in other embodiments the second blades 5B and 5B' n do not have equal or similar shape or dimensions.
  • first frame 7 and the second frame 7' form a single piece.
  • first frame 7 is linked to the second frame 7' with removable or immovable connection means.
  • the second rigid part 2 when the second rigid part 2 is in a stable position, it activates the resetting of the member indicator (not illustrated) associated with the heart 200.
  • the second rigid part 2 In the case where the watch mechanism 1000 is used in a chronograph watch, the second rigid part 2 is therefore, together with the blades 5A' and 5B', a reset bistable. zero. The reset function is carried out after the movement of the second rigid part 2.
  • the second rigid part 2 may comprise (at least) a hammer portion 22 which can cooperate with the heart 200, acting as a known hammer during the reset phase, as will be seen later.
  • the activation of the reset on the part of the second rigid part 2 can be carried out in different ways, directly or indirectly, for example and in a non-limiting manner, by contact (direct or indirect) of the portion of hammer 22 with heart 200.
  • the second rigid part 2 can be clamp-shaped or U-shaped, as in the example illustrated in Figure 2.
  • the watch mechanism comprises several cores 200 and the second rigid part 2 is arranged to activate these cores 200, for example with several hammer portions 22.
  • the second rigid part 2 comprises one or more recesses or (through) openings, for example openings in the x'y' plane, in order to reduce its inertia and/or in order to be able to activate a function.
  • these openings have a rectangular or polygonal shape, but any other shape can be considered.
  • the second rigid part 2 is a one-piece part. [00180] In one embodiment, the second rigid part 2 forms with the first flexible blade 5A' and/or the second flexible blade 5B' a one-piece part.
  • the second pivoting part 4 is arranged to cooperate with the first actuating device 6 and to pivot around a second axis perpendicular to the xy and x'y' planes.
  • this second axis corresponds to the axis of rotation z of the first pivoting part, as illustrated in Figure 2.
  • the first pivoting part 3 is at least partially superimposed on the second pivoting part 4, as illustrated in Figure 2.
  • the watch mechanism 1000 comprises the pin 34 on a mechanical pivot (rigid) or any other means of connection on a mechanical pivot (rigid), a first end 341 of which is linked to the first pivoting part 3 and the second end 342, which is opposite the first end 341, is received in a through opening 40 of the second pivoting part 4, as better visible in Figures 7A to 7D, which illustrate a perspective view of the first and the second pivoting parts 3, 4 in the phase preceding the start phase, in the start phase, in the stopping phase, respectively in the reset phase.
  • the second end 342 can move in the through opening 40 of the second pivoting part 4.
  • each pivoting part 3, 4 comprises an interaction portion 36 respectively 46, arranged to interact (directly or indirectly) with an actuation device.
  • these interaction portions 36, 46 have a substantially triangular shape, but any other shape can be considered.
  • the interaction portions 36, 46 do not necessarily have to have the same shape.
  • each pivoting part 3, 4 is actuated by a separate actuator, for example the pivoting part 3 is actuated by a starting actuator and the pivoting part 4 is actuated by a stop actuator.
  • each pivoting part 3, 4 also comprises a portion (not referenced in the figures) in correspondence of which it is linked to the first flexible blade 5A respectively 5A'.
  • the second pivoting part 4 comprises a reset portion 49, visible for example in Figures 7A to 7D, arranged to cooperate (directly as visible in Figure 2, or indirectly) with the second actuating device 9.
  • the reset portion 49 is a projection of the second pivoting part 4.
  • the second actuation device 9 may comprise a first rigid portion 91 and a second rigid portion 92, connected together by one or more flexible blades 93.
  • the two rigid portions 91, 92 are connected by two or several flexible blades 93, at least some of which can be parallel, as illustrated in Figure 2.
  • the second actuation device 9 may comprise an interaction portion 94, arranged to interact (directly as visible in Figure 2, or indirectly) with the reset portion 49 of the second pivoting part 4 .
  • the second actuation device 9 may comprise a housing 98 arranged to receive the stopper 80.
  • Figures 4 to 6 illustrate a top view of an embodiment of the watch mechanism according to the invention, in the starting, stopping or resetting phases.
  • the pivoting of the first pivoting part 3 causes, thanks to the pre-stressed flexible blades 5A and 5B, a movement, for example by translation along the direction of the arrow C visible in Figure 4, of the first part 1 and blades 5A, 5B towards a first stable position, so as to produce a clutch.
  • this first stable position is distant from the flange 102, so that the clutch return wheel 101 comes into contact with the flange 102.
  • the The indicator member (not illustrated) connected to the flange 102 therefore begins to rotate (starting phase).
  • the second rigid part 2 is pre-armed by means of the pin 34 between the first and the second pivoting parts 3, 4.
  • the locking part 8 is not necessary for the operation of the watch mechanism: for example, it may be absent in the case where the watch mechanism 1000 is used in a “flyback” type chronograph, where it is not no need to make a “stop” before “resetting”.
  • the pivoting of the first pivoting part 3 causes, thanks to the pre-stressed flexible blades 5A and 5B, a movement, for example by translation along the direction of the arrow D visible in Figure 5 (and opposite to the direction of arrow C in Figure 4), from the first part 1 towards a second stable position, so as to interrupt the clutch.
  • this second stable position raises the flange 102, so that the clutch return wheel 101 no longer comes into contact with the flange 102.
  • the indicator member (not illustrated) connected to the flange 102 stops (stopping phase).
  • the second rigid part 2 remains pre-armed by means of the pin 34 between the first and the second pivoting parts 3, 4.
  • the movement of the first rigid part 1 stops the interaction of the projection 18 with the first rigid portion 81 of the locking part 8.
  • the flexible blades 83 of the locking part 8 are re-deform, which allows the stopper 80 to come out of the housing 98 of the second actuation device 9, thus releasing the locking part 8 of the second actuation device 9. It is therefore possible to actuate the second actuation device 9, in order to reset the indicator organ associated with the heart 200.
  • the pivoting of the second pivoting part 4 causes, thanks to the pre-stressed flexible blades 5A' and 5B', a movement, for example by translation along the direction of the arrow E visible in Figure 5 (which corresponds to the direction of arrow D in Figure 5), of the second part 2 towards a second stable position, so as to actuate the heart 200 via the hammer portion 22.
  • a movement for example by translation along the direction of the arrow E visible in Figure 5 (which corresponds to the direction of arrow D in Figure 5), of the second part 2 towards a second stable position, so as to actuate the heart 200 via the hammer portion 22.
  • FIG 8 illustrates a perspective view of the first rigid part 1 of the watch mechanism according to another embodiment of the invention.
  • the watch mechanism 1000 comprises a mechanical pivot (not illustrated) having a main axis offset in the main xy plane relative to the axis of rotation of the pivoting part 3 in a prestressed state or initial, the pivoting part 3 being mounted on this mechanical pivot. This prestresses the first flexible blade 5A and the second flexible blades 5B and makes the assembly formed by the rigid part 1, the first flexible blade 5A and the second flexible blade 5B bistable.
  • the pin 38 (or any other rigid connection means) is mounted on this pivot.
  • the pivoting part 3 therefore pivots around the mechanical pivot, which in the illustrated embodiment is fixed relative to the frame 7B.
  • Figure 18A illustrates a view from above of the pivoting part 3, of the frame 7B, of the body 10 of the first rigid part 1, of the first flexible blade 5A and of the two second flexible blades 5B, the flexible blades 5A and 5B not being prestressed.
  • Figure 18B illustrates a top view of the mechanism of Figure 18A in which the flexible blades 5A and 5B are pre-stressed, because the pivoting part 3 is mounted on a mechanical pivot (not illustrated) having a main axis offset in the main plane xy relative to the axis of rotation of the pivoting part 3 in a non-prestressed state (that of Figure 18A), the position of the frame 7B being the same in the non-prestressed state ( Figure 18A) and prestressed (figure 18B).
  • the body 10 of the first rigid part 1 has a polygonal, substantially rectangular shape. It comprises several through openings 11 of different shapes (for example triangular, trapezoidal, etc.), in order to reduce its inertia and/or in order to be able to activate a function.
  • the first rigid part 1 comprises a housing 12 which is arranged to cooperate with a clutch mechanism, as will be seen later.
  • the first flexible blade 5A can be connected to the first rigid part 1 in correspondence with a central position of the lateral surface 15A of the first rigid part 1.
  • each second flexible blade 5B can be connected to the first rigid part 1 in correspondence with a peripheral position of a second lateral surface 15B of the first rigid part 1.
  • the flexible blades 5A and 5B comprise one or more recesses or (through) openings 55A respectively 55B, in order to reduce their rigidity in bending, to make it possible to lighten their weight and/or to better control their deformation.
  • these openings have a rectangular shape, but any other shape can be considered.
  • the first pivoting part 3 is arranged to pivot under the action of an actuating device 6 (visible in Figure 11) around the z axis. It carries a pin 38, which is arranged to cooperate both with the second pivoting part and with a third pivoting part 66, as will be seen. [00218] Unlike the embodiment of Figure 1, in this embodiment, the frame 7 does not directly connect the two second flexible blades 5B, but there are two frames 7B, each being connected to a second flexible blade 5B .
  • each frame 7B can comprise one or more (through) holes 70, in order to fix it to a bridge or to a plate of a movement comprising the watch mechanism 1000 according to the invention, for example via screws (not shown in Figure 8).
  • the frame 7B can be fixed to a bridge or to a plate with other means of fixing, for example via one or more pins, for example pivot pins (not illustrated), or for example also via one or more additional flexible blades (not shown), as indicated for the embodiments of Figures 1 and 2.
  • the first rigid part 1 forms with the first flexible blade 5A, the second flexible blades 5B and the frames 7B a one-piece part.
  • Figure 9 illustrates a perspective view of the second bistable of the watch mechanism according to another embodiment of the invention, which is intended to cooperate with the first bistable, as visible in Figure 10.
  • the body 20 of the second rigid part 2 has a polygonal shape. It comprises several through openings 21 of different shape (for example triangular, trapezoidal, etc.), in order to reduce its inertia and/or in order to be able to activate a function.
  • the second rigid part 2 comprises several hammer portions 22, which are substantially perpendicular to the body 20 and which project from one side and the other from the body 20. Each hammer portion 22 is arranged to cooperate with a core (not illustrated), during the reset.
  • the second rigid part 2 comprises a single hammer portion 22.
  • the second rigid part 2 comprises several hammer portions 22 which all project on one side from the body 20.
  • the second pivoting part 4 of this embodiment is arranged to pivot under the action of a second actuating device 9 (not illustrated in Figure 11, but visible for example in Figure 12A) around the same z axis of the first pivoting part. It has no openings (unlike the second pivoting part 4 in Figure 2) and comprises an end 43, which is arranged to cooperate with the pin 38 of the first pivoting part 3, as will be seen.
  • the second rigid part 2 forms with the first flexible blade 5A', the second flexible blades 5B' and the frames 7B' a single piece.
  • Figure 19A illustrates a view from above of the pivoting part 4, of the frame 7B', of the body 20 of the second rigid part 2, of the first blade flexible blade 5A' and the two second flexible blades 5B', the flexible blades 5A' and 5B' not being pre-stressed.
  • Figure 19B illustrates a top view of the mechanism of Figure 19A in which the flexible blades 5A' and 5B' are pre-stressed, because the pivoting part 4 is mounted on a mechanical pivot (not illustrated) having a main axis offset in the main xy plane relative to the axis of rotation of the pivoting part 4 in a non-prestressed state (that of Figure 19A), the position of the frame 7B' being the same in the non-prestressed state ( figure 19A) and prestressed (figure 19B).
  • Figure 10 illustrates a perspective view of the first bistable of Figure 8 and the second bistable of Figure 9.
  • the first rigid part 1 is at least partially superimposed on the second rigid part 2.
  • all the openings 11 and 21 of the bodies of the first respectively second rigid parts 1, 2 are at least partially superimposed, this is not essential for the operation of the watch mechanism 1000.
  • Figure 11 illustrates a perspective view of the assembly of the first bistable and the second bistable of Figure 10, with a first actuation device 6 of the watch mechanism according to another embodiment of the invention.
  • the first actuation device 6 comprises a spring 68, connected to a rocker pusher 67.
  • the mechanism also comprises a third pivoting part 66, which is superimposed on the second pivoting part 4, the second pivoting part 4 being taken at least partially sandwiched between the first pivoting part 3 and the third pivoting part 66.
  • the third pivoting part 66 comprises a (through) opening 660 arranged to receive the free end of the pin 38 of the first pivoting part 3.
  • a second pin 346 (illustrated in Figure 12A) is inserted into the through openings 30 and 40 of the first respectively second pivoting part 3, 4 (which are substantially aligned as visible in Figure 10) and one of its ends is also received in the through opening 670 of the push-rocker 67.
  • the second pin 346 therefore connects the first, the second and the third pivoting part 3, 4, 66.
  • FIG 12A illustrates a top view of the watch mechanism 1000 according to another embodiment of the invention, in the phase preceding the starting phase.
  • the watch mechanism 1000 comprises, in addition to the components illustrated in Figure 11:
  • a second actuation device 9 arranged to actuate a reset of an indicator member associated with a heart (not illustrated), - an intermediate part 8', arranged to cooperate with the second actuating device 9, in order to move the second rigid part 2, in particular during the reset, as will be seen.
  • the clutch mechanism 100 is a clamp, comprising a first clamp portion
  • each clamp portion 103 and a second clamp portion 104, each clamp portion 103,
  • the two clamp portions 103, 104 are two rigid and distinct parts which come into direct contact at one of their ends.
  • the first clamp portion 103 comprises a pin 112 which is arranged to be received in the housing 12 of the first rigid part.
  • the second clamp portion 104 comprises a flexible blade 107, one end of which is linked to a hole 70 of the frames 7B/7B'.
  • Figure 12B illustrates a bottom view of the watch mechanism of Figure 12A, in the phase preceding the start phase or “off” phase.
  • the second actuating device 9 of Figure 12A comprises a rigid body 96 connected to a flexible blade 95, in particular a flexible blade in the shape of a hook. Under the action of a user, it is arranged to rotate around the axis R. It comprises a portion 98' arranged to cooperate with the interaction part, for example via direct contact during reset, as visible in Figures 15A and 15B.
  • the second actuation device 9 of Figure 12A is not locked during the starting phase. Even if it is activated during this phase, it does not allow a reset, because its portion 98' does not come into contact with the intermediate part 8': the hammer portion(s) 22 does not can therefore not activate the heart(s).
  • the intermediate part 8' comprises a rigid body 80', connected to two flexible blades 83', which can for example be arranged in a V shape.
  • This V shape has two functions:
  • the intermediate part 8' also comprises a first pin 81', arranged to be received in an opening 121 created by the at least partial superposition of an opening 11 of the first rigid part with a second opening 21 of the second part rigid, and a second pin 82' which is arranged to cooperate with a hammer portion 22 of the second rigid part 2.
  • the first pin 81' serves in particular to disengage the reset function during the starting phase .
  • Figure 13A illustrates a top view of the watch mechanism 1000 of Figure 12A, in the starting phase.
  • Figure 13B illustrates a bottom view of the watch mechanism 1000 of Figure 13A.
  • the pivoting of the first pivoting part 3 causes, thanks to the pre-stressed flexible blades 5A and 5B, a movement, for example by translation along the direction of the arrow G visible in Figure 12A, of the first rigid part 1 towards a first stable position, in order to achieve a clutch.
  • the pin 112 is received in the housing 12, which causes a rotation of the first clamp portion 103 around the axis P in the direction of the arrow P1 and a rotation of the second clamp portion 104 around the axis P' in the direction of arrow P2, opposite that of arrow P1: the two clamp portions 103, 104 are at maximum spacing (clamp in open position), which allows the indicator member (not shown) to turn.
  • the pivoting of the second pivoting part 4 causes, thanks to the pre-stressed flexible blades 5A' and 5B', a movement, for example by translation, always along the direction of the arrow G visible in Figure 12A, of the second room 2 too.
  • FIG. 14A illustrates a top view of the watch mechanism 1000 of Figure 12A, in the stopping phase.
  • Figure 14B illustrates a bottom view of the watch mechanism 1000 of Figure 14A.
  • the pivoting of the first pivoting part 3 causes, thanks to the pre-stressed flexible blades 5A and 5B, a movement, for example by translation, along the direction of the arrow H visible in Figure 14A (and opposite to the direction of arrow G in Figure 13A), from the first part 1 towards a second stable position, so as to interrupt the clutch.
  • the movement of the first rigid part 1 causes the pin 112 to come out of the housing 12, as better visible in Figure 14: the first clamp portion 103 then rotates around the axis P in the direction of the arrow P1' (opposite to that of arrow P1 in Figure 13A) and the second clamp portion 104 rotates around axis P' in the direction of arrow P2' (opposite to that of arrow P2 in Figure 13A ).
  • the two clamp portions 103, 104 are at a minimum distance (clamp in the closed position), which stops the indicator member (not illustrated).
  • the movement of the first rigid part 1 also allows the rotation of the interaction part 8' around the axis of rotation Q, in the direction of rotation of the arrow Q1: the pin 82' of the part d 'interaction 8' then comes into contact with the hammer portion 22 of the second rigid part 2.
  • the second part 2 remains pre-armed by means of the (second) pin 346 between the three pivoting parts 3, 4, 66.
  • Figure 15A illustrates a top view of the watch mechanism 1000 of Figure 12A, in the reset phase.
  • Figure 15B illustrates a bottom view of the watch mechanism 1000 of Figure 15A.
  • the second actuation device 9 does not act directly on the second pivoting part 4. By actuating the second actuation device 9, it is caused rotation around the axis R in the direction of rotation R1 illustrated in Figure 15A, which brings the portion 98' of the second actuating device 9 into contact with the corresponding portion 89' of the interaction part 8'.
  • the interaction part 8' rotates around the axis Q again in the same direction of rotation Q1 of the stopping phase (figure 14A), which causes via the pin 82' the movement of the second rigid part 2 along the direction of the arrow L visible in Figure 15A (which corresponds to the direction of the arrow H in Figure 14A) towards a second stable position, so as to actuate the(s) ) heart(s) (not illustrated) 200 via the hammer portion(s) 22.
  • the watch mechanism 1000 according to the invention is received in a watch case comprising a bridge or a separator element defining two housings, for example one side dial and the other back side, the watch mechanism 1000 according to the invention being received in one of these housings.
  • Figure 22A illustrates a top view of a mechanism according to another embodiment, in the phase preceding that of departure.
  • Figure 22B illustrates a bottom view of the mechanism of Figure 22A.
  • the watch mechanism comprises in a main xy plane:
  • the pivoting part 3 is also a rigid part and the rigid part 1" is also a pivoting part, because it is arranged to pivot under the action of the flexible blade 5A around an axis z" also perpendicular to the principal xy plane. Consequently, in this embodiment the rigid pivoting part 3 will be named rigid pivoting input part and the rigid pivoting part 1" will be named rigid pivoting output part.
  • the watch mechanism also comprises in the main xy plane a mechanical pivot (not illustrated) having a main axis offset in the main xy plane relative to the axis of rotation in a non-prestressed or initial being of at least one between the rigid pivoting input part 3 and that of output 1".
  • the rigid pivoting input part 3 and/or the output part 1" are mounted on this mechanical pivot, which pre-stresses the first flexible blade 5A and makes the assembly formed by the part bistable. rigid pivoting input part 3, that of output 1" and the first flexible blade 5A, so that the rigid pivoting input part 3 which rotates causes the movement of the bistable assembly in the main xy plane from a first stable position to a second stable position.
  • this bistable is a bistable which makes it possible to execute the starting and/or stopping function of a non-illustrated indicator member of a chronograph watch.
  • Figure 20A illustrates a top view of the bistable for starting and/or stopping, in which the flexible blade 5A is not pre-stressed.
  • Figure 20B illustrates a top view of the bistable of Figure 20A in which the flexible blade 5A is pre-tensioned, because the rigid pivoting output part 1" is mounted on a mechanical pivot (not illustrated) having a main axis offset in the main plane relative to the axis of rotation rigid pivoting output part 1 "in a non-prestressed state (that of Figure 20A), the position of the rigid pivoting input part 3 being the same in the non-prestressed state ( Figure 20A) and prestressed state ( Figure 20B).
  • Figure 20C which is a superposition of Figures 20A and 20B, illustrates the offset d 5 between the two axes of rotation. In one embodiment, the offset d 5 is less than one tenth of the length of the flexible blade 5A".
  • the termination method of Figures 20A to 20C should not be considered limiting, because for example it is also possible that the position of the rigid pivoting output part 1" is the same in the non-prestressed state and prestressed and the rigid pivoting input part 3 is mounted on a mechanical pivot having a main axis offset in the main plane relative to the axis of rotation of the rigid pivoting input part 3 in a non-prestressed state. It is also possible that both the rigid pivoting input part 3 and the output piece 1" are mounted on a mechanical pivot having a main axis offset in the main plane by relative to the axis of rotation of the pivoting input part 3 respectively output 1" in a non-prestressed state.
  • the rigid pivoting input part 3 is arranged to also rotate from a first stable position to a second stable position and when the rigid pivoting input part 3 is in its first stable position, the bistable assembly for starting and/or stopping is also in its first stable position and when the rigid pivoting input part 3 is in its second stable position, the bistable assembly for starting and/or stopping is also in its second stable position.
  • the rigid pivoting output part 1" when the rigid pivoting output part 1" is in a stable position, it is arranged to activate a clutch mechanism 100 (a clamp comprising two clamp portions 103, 104 in FIG. 20A ), in order to produce a clutch, and when the rigid pivoting output part 1" is in another stable position, it is arranged to deactivate the clutch mechanism in order to achieve a disclutch.
  • a clutch mechanism 100 a clamp comprising two clamp portions 103, 104 in FIG. 20A
  • the rigid pivoting output part 1" is arranged to directly activate the clutch mechanism 100 by coming into direct contact with the clutch mechanism 100.
  • the part rigid pivoting output 1" is arranged to indirectly activate the clutch mechanism 100.
  • the pivoting of the rigid pivoting input part 3 causes a deformation of the flexible blades 5A and 5B.
  • This deformation causes a movement (by rotation in the case of Figure 22A) of the rigid pivoting output part 1", and after this movement a function (the start or stop of a chronograph in the case of Figure 22A ) is executed.
  • the rigid pivoting output part 1" comprises a pin 112" and the clutch mechanism 100 comprises a housing 12 arranged to receive this pin 112", in order to activate the clutch mechanism 100 to make a clutch.
  • the watch mechanism comprises:
  • a second rigid part 2 arranged to move (in particular in the same xy plane of the first rigid pivoting output part 1") under the action of the second actuation device 9, from a first stable position (relative to a frame 7B), to a second stable position (relative to a frame 7B), the movement of the second rigid part 2 making it possible to perform a function, for example a reset function.
  • the movement of the second rigid part 2 is a movement by translation.
  • the watch mechanism comprises a second pivoting part 4, arranged to pivot under the action of the first actuating device 6 (as indicated for example in Figure 20A) or another second actuating device (not illustrated) around an axis perpendicular to the main plane.
  • this axis is the same z axis of the pivoting input part 3.
  • a first flexible blade 5A' connects the second rigid part 2 to the second pivoting part 4, and at least one second flexible blade 5B' (two in the mode illustrated on a fig tree 22A) connects the second rigid part 2 to the frame 7B.
  • the second pivoting part 4 is mounted on a mechanical pivot having a main axis offset in the main xy plane relative to the axis of rotation of the second pivoting part 4 in a non-prestressed state. or initial.
  • the second bistable assembly moves by a translation movement. In one embodiment, the second bistable assembly moves in the main xy plane.
  • Figure 21A illustrates a view from above of the pivoting part 4, of the frame 7B', of the second rigid part 2, of the first flexible blade 5A' and of the two second flexible blades 5B', the flexible blades 5A ' and 5B' not being prestressed.
  • Figure 21 B illustrates a top view of the mechanism of Figure 21A in which the flexible blades 5A' and 5B' are pre-stressed, because the pivoting part 4 is mounted on a mechanical pivot (not illustrated) having an axis main offset in the main plane xy relative to the axis of rotation of the pivoting part 4 in a non-prestressed state (that of Figure 21A), the position of the frame 7B' being the same in the non-prestressed state (figure 21 A) and prestressed (figure 21 B).
  • the pivoting entry part 3 may include a pin 34 which allows the hammer to be lifted at the first start.
  • the second pivoting part 4 includes a pin 112" which is used to operate the clutch clips 103, 104.
  • the actuating device 6 is arranged to act on the pivoting input part 3 which in one embodiment comprises at least one notch (two in Figure 20B, references 31 and 32). Depending on its position, a nozzle or projection 63 of the actuating device 6 enters one of the notches 31, 32 and causes a pivoting of the pivoting input part 3 and a bending of the blade 5A until the bistable jumps for the start and/or stop (namely until the pivoting of the rigid pivoting output part 1"), after which the bistable for the start and/or stop stops in its second stable position. We can therefore activate the bistable in both directions as many times as you want.
  • the actuation device 6 of Figures 22A and 22B is non-limiting: it can for example be a monolithic pusher or another actuation device, for example an actuation device free of rigid rockers.
  • the second pivoting part 4 (which in the mode of Figure 22A is also rigid) of the bistable for resetting is found in the “hammer against the hearts” position, the pin 34 for starting and/or stopping will come into contact with the second pivoting part 4 and make it pivot around its axis.
  • the 5A' and 5B' blades of the bistable for resetting will therefore bend until the jump of the bistable for the reset which will find itself in its second stable position (“hammer raised”).
  • the first actuation device 6 activates the pivoting input part 3; the second pivoting part 4 pre-arms the bistable for resetting via the pin 34 of the pivoting input part 3 (figure 26C).
  • the rigid pivoting 1" output part rotates and opens the clutch clips 103, 104 via the pin 112". The clutch ensures the connection of the chronograph with the time chain.
  • this position of the clamps 103, 104 guarantees a stop for the second actuating device 9: the chronograph cannot be reset to zero when it is running. In this embodiment we therefore have security against resetting [00299]
  • the chronograph is stopped ( Figures 25A, 25B and 26D). In this case, the bistable for starting and/or stopping takes its second stable position. The clamps close (arrows P and Q in Figure 25A), the chronograph is disengaged. In this case, the second pivoting part 4 rotates (in the direction of the arrow S in Figure 25A) without interacting with the hammer 22 which remains pre-cocked. By pressing the first actuating device 6 again, the chrono can be restarted.
  • the indicator members when the chronograph is stopped, the indicator members (not shown) can be reset to zero by pressing the second actuating device 9, because there is no longer a stop.
  • the bistable for resetting strikes the hearts (not illustrated) of the chronograph indicator members and places them in the zero position.
  • Second rigid part 3 First pivoting part / rigid pivoting entry part

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electric Clocks (AREA)
EP23738585.1A 2022-06-23 2023-06-22 Bistabiler uhrsteuermechanismus Pending EP4544360A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH000755/2022A CH719809A2 (fr) 2022-06-23 2022-06-23 Mécanisme horloger, notamment pour une montre-chronographe
FR2206275 2022-06-23
PCT/IB2023/056467 WO2023248178A1 (fr) 2022-06-23 2023-06-22 Mécanisme de commande d'horlogerie a comportement bistable

Publications (1)

Publication Number Publication Date
EP4544360A1 true EP4544360A1 (de) 2025-04-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP23738585.1A Pending EP4544360A1 (de) 2022-06-23 2023-06-22 Bistabiler uhrsteuermechanismus

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US (1) US20250390065A1 (de)
EP (1) EP4544360A1 (de)
JP (1) JP2025519420A (de)
WO (1) WO2023248178A1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3327518B1 (de) * 2016-11-29 2020-03-18 Montres Breguet S.A. Uhr mit schaltvorrichtung für einen uhrmechanismus
CH713288A1 (fr) 2016-12-23 2018-06-29 Sa De La Manufacture Dhorlogerie Audemars Piguet & Cie Composant monolithique flexible pour pièce d'horlogerie.
EP3582029B1 (de) * 2018-06-14 2021-09-08 Patek Philippe SA Genève Rattrapanten-mechanismus und chronograph, der einen solchen mechanismus umfasst
EP3876042B1 (de) * 2020-03-05 2023-12-06 Montres Breguet S.A. Nullstellungssystem eines chronographen

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US20250390065A1 (en) 2025-12-25
WO2023248178A1 (fr) 2023-12-28
JP2025519420A (ja) 2025-06-26

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