TWI709009B - Mechanism for a timepiece, watch movement and timepiece comprising such a mechanism - Google Patents

Abstract

Mechanism for a timepiece comprising two regulating members (29) elastically mounted and connected to one another so as to oscillate in opposition, and an anchor (11) adapted to engage with an energy distribution member (10) and acted upon by an energy storage device. The anchor is controlled by the first regulating member so as to regularly and alternately lock and release the energy distribution member. The mechanism further comprises a balancing member (25) which is controlled by the second regulating member (30) so as to move in symmetrical movements that are opposite to the anchor.

Description

Mechanisms used for clocks, watch movements and clocks containing such mechanisms

The present invention relates to a timepiece mechanism, a watch movement and a timepiece containing the mechanism.

The mechanisms used for timepieces are known and include:

An adjuster including at least a first adjusting member elastically mounted on a supporting member for oscillation,

An anchor, adapted to engage with an energy distribution member provided with teeth, wherein the energy distribution member is intended to be acted on by an energy storage device, and the anchor is controlled by the first adjusting member to lock and release the energy distribution regularly and alternately Accessories so that the energy distribution member moves step by step in a repeated motion cycle under the push of the energy storage device, and the anchor is suitable for transferring mechanical energy to the regulator during this repeated motion cycle.

Known mechanisms of this type have the following disadvantages: their vibrating mass is sensitive to collisions, gravity, and more generally acceleration and dynamic phenomena, which can disrupt the oscillating movement of the mechanism and therefore interrupt the time calculated by the mechanism.

The purpose of the present invention is to overcome this disadvantage.

To this end, in this type of mechanism according to the present invention, the adjuster further includes a second adjusting member that is elastically mounted on the supporting member to oscillate, and the first adjusting member and the second adjusting member are connected to each other so that they have Symmetric and opposite movement,

And the mechanism further includes a balancer, the balancer is controlled by the second adjusting member so as to move in a symmetrical motion opposite to the anchor.

With these settings, the oscillating mass of the mechanism is dynamically balanced, making it possible to significantly reduce the sensitivity to collisions, gravity, and more generally acceleration. Therefore, because it is independent of dynamic phenomena, a better time accuracy of the mechanism can be obtained.

In different embodiments of the mechanism according to the present invention, one or more of the following arrangements may be used: the anchor has a certain mass, and the balancer has a substantially same mass, for example between 90% and 110% of the mass of the anchor % Between; the first adjusting member and the second adjusting member are installed on the supporting member so as to translate and oscillate in a first translational direction; each of the first adjusting member and the second adjusting member is installed on the supporting member to Oscillate in a circular translational reciprocating motion, wherein the circular translational reciprocating motion has a first oscillation amplitude in the first translation direction and a non-zero secondary oscillation amplitude perpendicular to the first translation direction. The first oscillation amplitude of the adjustment member and the second adjustment member is larger than the secondary oscillation amplitude; the first oscillation amplitude of the first adjustment member and the second adjustment member is at least 10 times larger than the secondary oscillation amplitude; Each of the adjusting member and the second adjusting member is installed on the support member through two elastic cantilevers substantially perpendicular to the first translation direction; the first adjusting member and the second adjusting member are connected to each other through a pivoting balance rod; The firmware and the balancer are elastically mounted on the support so as to translate and oscillate in a second translational direction; the second translational direction is approximately perpendicular to the first translational direction; each of the anchor and the balancer is installed on the support, In order to oscillate in a circular translation, wherein the circular translation oscillation has a second oscillation amplitude in the second translation direction and a non-zero secondary oscillation amplitude of one perpendicular to the second translation direction, the anchor and the balancer The second oscillation amplitude is larger than the secondary oscillation amplitude; the second oscillation amplitude of the anchor and the balancer is at least 10 times larger than the secondary oscillation amplitude;

The anchor and the balance are respectively installed on the support through two elastic cantilevers that are substantially perpendicular to the second translation direction;

The anchor member and the balance member are respectively connected to the first adjusting member and the second adjusting member through a first elastic driving arm and a second elastic driving arm;

This mechanism is monolithic and implemented in a single board.

The invention also relates to a watch movement with the above-defined structure and energy distribution member.

Finally, the present invention also relates to a timepiece including a watch movement as defined above.

In the various drawings, the same reference numerals indicate the same or similar elements.

Figure 1 shows a timepiece 1, such as a wristwatch, which contains:

A shell 2,

A watch movement, housed in the case 2,

Generally, a bulge (winding mechanism) 4,

A dial 5,

A glass 6, covering dial 5,

A time indicator 7, for example, includes two hands 7a, 7b indicating the hour and minute respectively, which are arranged between the glass 6 and the dial 5 and actuated by the movement 3 of the watch.

As schematically shown in Fig. 2, the watch movement 3 may, for example, include:

A mechanical energy storage device 8, usually a barrel mainspring,

A mechanical transmission 9, driven by a mechanical energy storage device 8,

The aforementioned time indicator 7,

An energy distribution member 10 (for example an escape wheel),

An anchor 11, suitable for sequentially holding and releasing the energy distribution member 10,

An adjuster 12 is a mechanism that includes a swing adjuster. The swing adjuster controls the anchor 11 to move regularly, so that the energy distribution member is gradually displaced at a constant time interval.

The anchor 11 and the adjuster 12 form a mechanism 13, which may advantageously be integral, as will be described below.

The watch movement 3 will now be explained in more detail with reference to FIG. 3. FIG. 3 shows a specific situation in which the mechanism 13 is an integral system formed in a plate 14 (usually flat), and the mechanism 13 is movable The part is designed to move approximately in the middle plane of the plate 14. However, the present invention is not limited to this single-layer system.

The plate 14 may be thin, for example, about 0.05 to about 1 millimeter (mm) depending on the material properties of the plate 14.

The plate 14 may have a lateral dimension between approximately 10 mm and 40 mm in the plate's plane XY (especially width and length, or diameter). X and Y are two vertical axes that define the plane of the plate 14.

The plate 14 may be made of any suitable rigid material, and preferably has a low Young's modulus in order to exhibit good elastic properties and a low oscillation frequency. Examples of materials that can be used to make the plate 14 include silicon, nickel, iron/nickel alloy, steel, and titanium. In the case of silicon, the thickness of the plate 14 may be, for example, between 0.2 and 0.6 mm.

The various components formed in the board 14 are obtained by creating openings in the board 14, and obtained by any manufacturing process used in micro-machines, especially the process used to manufacture MEMS.

In the case of a silicon plate 14, the plate 14 can be locally thinned, for example, by deep reactive ion etching (DRIE) or optionally by laser cutting.

In the case of an iron/nickel plate 14, the plate 14 can be manufactured by the LIGA method or by laser cutting.

In the case of a steel or titanium plate 14, the plate 14 can be thinned, for example, by wire electrical discharge machining (WEDM).

The components of this mechanism will now be described in more detail. Some of these parts are rigid, and other parts (in particular referred to as "elastic arms") are generally elastically deformable through bending. The difference between the rigid part and the elastic part lies in their rigidity in the plane XY of the plate 14. The rigidity is determined by their shape, especially the elongated shape. The slender length can be measured in particular through the aspect ratio (length/width ratio of the part involved). For example, the rigid part has a stiffness in the XY plane that is at least about 100 times higher than that of the elastic part. The typical size of the elastic connecting member, such as the elastic arm described below, includes, for example, a length between 5 and 13mm, such as between 0.01mm (10μm) and 0.04mm (40μm), especially about 0.025mm (25μm). width. Given the width of the columns and the thickness of the plate 14, the aspect ratio of these columns in the longitudinal section is between 5 and 60. In order to reduce out-of-plane oscillation modes, the largest possible aspect ratio is preferred.

The plate 14 forms a fixed outer frame 15, and the outer frame 15 is fixed to a supporting plate 14 a by, for example, screws or the like (not shown) passing through the holes 15 a of the frame 15. The support plate 14a is fixed to the case 2 of the timepiece 1. The frame 15 may at least partially surround the energy distribution member 10, the anchor 11, and the regulator 12.

The energy distribution member 10 can be an escape wheel, and is rotatably mounted on, for example, the support plate 14a so as to be able to rotate around a rotation axis Z0 perpendicular to the plane XY of the plate 14. The energy distribution member 10 is biased through the energy storage device 8 in a single rotation direction 16.

The energy distribution element 10 has external teeth 17.

The anchor 11 is a rigid component. The anchor 11 may include, for example, a rigid body 18 extending parallel to the axis X and two parallel rigid side arms 19 extending parallel to the axis Y on each side of the energy distribution member 10 , 20. The side arms 19 and 20 respectively include two finger stoppers 21 and 22 protruding from the side arms 19 and 20 toward each other along the axis X direction.

The anchor 11 is elastically connected to the frame 15 so as to be able to move parallel to the axis X along a translation direction O2. Advantageously, the anchor 11 can be connected to the frame 15 through an elastic suspension, which includes, for example, two elastic arms 23 substantially parallel to the axis Y. The elastic arm 23 may be connected to the body 18 and provided on each side of the side arms 19 and 20 surrounding these side arms.

The anchor 11 may also include a rigid arm 24 extending along the axis Y toward the adjuster 12, and the rigid arm 24 is opposite to the side arm 20.

The anchor 11 may further include a monostable elastic member 11 a, and the monostable elastic member 11 a may be in the form of an elastic tongue, the free end of which is supported on the teeth 17 of the energy distribution member 10. The monostable elastic member 11a can be connected to the rigid side arm 19 of the anchor 11 through an elastic suspension, wherein the elastic suspension includes two parallel elastic arms 11b extending from the free end of the rigid side arm 19 along the axis Y. The elastic arm 11b The side arm 19 is extended to the rigid support 11c supporting the monostable elastic member 11a. The monostable elastic member 11a may extend along the axis Y from the rigid support member 11c in the direction of the adjuster 12. The monostable elastic member 11a is arranged such that the energy distributing member 10 transmits precisely determined mechanical energy to the regulator during each operation cycle of the watch movement 3, as described in European Patent Application No. 14197015.

This mechanism also includes a balancer 25 which is mounted on the frame 15 so as to oscillate parallel to the axis X in the translational direction O2. The balance member 25 may for example include:

A rigid body 26 extends parallel to the axis X, and the rigid body 26 is symmetrical to the anchor body 18 with respect to a symmetry axis Y0 parallel to the axis Y,

And a rigid arm 28 extending toward the adjuster 12 along the axis Y, relative to the symmetry axis Y0 and the arm 24 of the anchor.

The balance member 25 can also be located inside the frame 15 and can be connected to the frame 15 through an elastic suspension. The elastic suspension includes, for example, two elastic arms 27 substantially parallel to the axis Y and symmetrical to the elastic arms 23 of the anchor 11. The elastic arm 23 may be connected to the body 26 of the balancer 25.

The anchor 11 and the balancer 25 are each installed on the frame 15 so as to have an oscillation amplitude in the translation direction O2 and a non-zero secondary oscillation amplitude perpendicular to the translation direction O2, and oscillate in a circular translation. The amplitude of the oscillation in the translation direction O2 is larger than the secondary oscillation amplitude of the anchor and the balance, for example, at least 10 times larger than the secondary oscillation of the anchor and the balance.

The balance member 25 can advantageously have a mass substantially the same as that of the anchor 11, for example between 90% and 110% of the mass of the anchor 11. The mass of the balancer is very close to the mass of the anchor, but not necessarily the same, in order to take into account the fact that the stresses acting on one or the other of these elements are not completely symmetrical (for example, the anchor is in contact with the energy distribution member, and the balance The pieces did not touch).

The adjuster 12 is a mechanical oscillator including first and second adjusting members 29, 30, each adjusting member forms a rigid inertial mass, and each adjusting member is connected to the frame 15 through an elastic suspension, which is suitable for making The first and second adjusting members 29, 30 oscillate around the axis Y in a translational direction O1.

The elastic suspensions of the first and second adjusting members 29, 30 may, for example, each include two elastic arms 31 extending substantially along the axis X and connected to the frame 15.

Each of the first and second adjusting members 29, 30 is thus mounted on the frame 15 so as to have an oscillation amplitude in the translation direction O1 and a non-zero secondary oscillation amplitude perpendicular to the translation direction O1 in a circle Shape translational oscillation. The oscillation amplitude in the translation direction O1 is larger than the secondary oscillation amplitude of the first and second adjusting elements, for example, at least 10 times larger than the secondary oscillation amplitude.

In the example shown, the first and second adjusting members 29, 30 may each have a C shape and have a body 32 extending along the axis Y between two side arms 33 extending toward the inside of the frame 15 . The aforementioned elastic arm 31 is advantageously connected to the free end of the side arm 33, which makes it possible to have a long and therefore particularly flexible elastic arm 31.

The first and second adjusting members 29, 30 may be two parts having the same or substantially the same mass symmetrically with respect to the aforementioned symmetry axis Y0. They can define a free center space 34 between them.

The first and second adjusting members 29, 30 can be connected to the anchor 11 and the balance member 25, for example, through an elastic driving arm 36, respectively. Therefore, the first adjustment piece 29 controls the movement of the anchor 11 and the second adjustment piece 30 controls the movement of the balance piece 25.

The elastic arm 36 may extend substantially along the axis X, for example. The elastic drive arm 36 may be connected to the free ends of the rigid arm 24 of the anchor and the rigid arm 28 of the balancer, respectively.

Each of the first and second adjusting members 29, 30 may include a notch 35 between the body 32 and the rigid arm 33 closest to the anchor 11 or the balance member 25, opening along the axis X, and The corresponding driving arm 36 may be connected to the body 32 at the bottom of the recess 35, which makes it possible to extend the elastic driving arm 36, thereby increasing the flexibility of the driving arm 36.

A rigid balance rod 37 is provided in the free inner space 34, and the balance rod 37 is installed to pivot around the central rotation center P. The balance bar 37 may have a substantially M-shaped shape with a V-shaped central portion 38 deviated from the rotation center P and two side arms.

The side arm 39 can be connected to the first and second adjusting members 29 and 30 respectively through two elastic arms 40 extending substantially along the axis Y.

The balance bar 37 can be mounted on a rigid support 40 a rigidly connected to the frame 15 through an elastic suspension 43. The rigid support 40a may, for example, include an arm 41 extending from the frame 15 to a head 42 along the axis of symmetry Y0 such that the support 40a has a T-shape, wherein the head 42 may extend along the axis X, for example.

The elastic suspension 43 may include, for example:

A rigid pivot member 44 is arranged inside the balance bar 37 and includes, for example, a central core 45 at the center of rotation P. The central core 45 extends along the axis X between the two enlarged heads 46,

Two rigid intermediate bodies 47, 48 are arranged on each side of the central core 45 near the center of rotation P,

Two elastic arms 49 respectively connect the free ends of the head 42 of the rigid support arm 41 to the rigid intermediate body 47,

Two elastic arms 50 respectively connect the rigid intermediate body 47 to one of the free ends of the enlarged head 46,

Two elastic arms 51, symmetrical to the elastic arms 50, respectively connect the rigid intermediate body 48 to the other of the free ends of the enlarged head 46,

Two elastic arms 52 respectively connect the rigid intermediate body 48 to the ends of the central part 38 of the balance bar.

The balance bar 37 forces the first and second adjusting members 29, 30 to move symmetrically and oppositely in the translation direction O1, and the movement in the translation direction O1 uses the elastic drive arm 36 to force the anchor 11 and the balance member 25 to move symmetrically and oppositely in the translation direction O2 Ground movement, as shown in Figures 4 and 5, shows the two end positions of the mechanism 13.

These opposite movements allow for the dynamic balance of the mechanism 13, which makes it possible to reduce the sensitivity of the mechanism 13 to collisions, gravity, and more generally to acceleration.

The above-mentioned mechanism operates according to the principle explained in the European Patent Application No. 14197015. In the following description of such operations, the concepts of high/low and right/left are used to clarify the description about the orientation of the drawings in FIGS. 3 to 5, but these instructions are not restrictive.

In the case of FIG. 3, the anchor 11 is at a pole "right" position imposed by the elastic transmission arm 36, and the energy distribution member 10 has just pivoted under the action of the energy storage device 8, and during this movement, the single The steady state elastic member 11a has been bent and then relaxes by transmitting its mechanical energy to the adjuster 12, as described in the European Patent Application No. 14197015. The teeth 17 of the energy distribution member on the left side in FIG. 3 then abut the stop member 21 on the left side of the anchor member 11. The elastic arm 31 is in a rest position.

The first and second adjusting members 29, 30 oscillate in the translation direction O1 between the two extreme positions shown in FIGS. 4 and 5, respectively, and the frequency f may be, for example, between 20 and 30 Hz.

During the half-motion cycle, for example, when the first adjusting member 29 transitions from the "high" limit position of FIG. 4 to the "low" limit position of FIG. 5, due to the existence of the balance bar 37, the second adjusting member 30 changes from FIG. 4 The "low" limit position of is changed to the "high" limit position of Figure 5. During time, when the first and second adjusting members reach the middle position of FIG. 3, the anchor 11 changes from the "left" extreme position of FIG. 4 to the "right" extreme position of FIG. 3, and then the anchor 11 returns To the "left" extreme position of FIG. 5, the energy distribution member 10 escapes again under the bias of the energy storage device 8 and rotates one step at this position. During this time, the balancer 25 follows a movement that is symmetrical and opposite to the anchor 11.

The anchor 11 and the balance 25 therefore oscillate at the frequency 2f in the translation direction O2.

When it then switches from the position of Fig. 5 to the position of Fig. 4, the operation is the same. Then repeat the above steps indefinitely.

1‧‧‧Watch 2‧‧‧Case 3‧‧‧Watch movement 4‧‧‧Protrusion 5‧‧‧Dial 6‧‧‧Glass 7‧‧‧Time indicator 7a‧‧‧Hand 7b‧‧‧Hand 8‧‧‧Storage device9‧‧‧Mechanical transmission 10‧‧‧Energy distribution piece 11‧‧‧Anchor 11a‧‧‧Mono-stable elastic piece 11b‧‧Flexible arm 11c‧‧‧Rigid support 12‧‧ ‧Adjuster 13‧‧‧Mechanism 14‧‧‧Plate 14a‧‧‧Support plate 15‧‧‧Frame 15a‧‧‧Hole 16‧‧‧Rotation direction 17‧‧‧Teeth 18‧‧‧Main body 19‧‧‧Side Arm 20‧‧‧Side arm 21‧‧‧Stop part 22‧‧‧Stop part 23‧‧‧Elastic arm 24‧‧‧Arm 25‧‧‧Balancer 26‧‧‧Body 27‧‧‧Elastic arm 28‧‧ ‧Rigid arm 29‧‧‧First adjustment piece 30‧‧‧Second adjustment piece 31‧‧‧Elastic arm 32‧‧‧Body 33‧‧‧Side arm 34‧‧‧Free center space 35‧‧‧Notch 36 ‧‧‧Drive arm 37‧‧‧Balance bar 38‧‧‧Central part 39‧‧‧Side arm 40‧‧‧Flexible arm 40a‧‧‧Support 41‧‧‧arm 42‧‧‧head 43‧‧‧ Elastic suspension 44‧‧‧rigid pivot 45‧‧‧center core 46‧‧‧head 47‧‧‧rigid intermediate 48‧‧‧rigid intermediate 49‧‧‧elastic arm 50‧‧‧elastic arm 51 ‧‧‧Flexible arm 52‧‧‧flexible arm O1‧‧‧translation direction O2‧‧‧translation direction Y0‧‧‧axis of symmetry P‧‧‧center of rotation Z0‧‧‧axis of rotation X, Y, Z‧‧‧axis

Fig. 1 is a schematic diagram of a timepiece that may include a mechanism according to an embodiment of the present invention, Fig. 2 is a block diagram of the watch movement of Fig. 1, and Fig. 3 is a diagram including an adjuster, an anchor and an energy distribution member, Fig. 2 A plan view of a part of the movement, and Figs. 4 and 5 are views similar to Fig. 3 and showing different positions of the mechanism.

3‧‧‧Watch Movement

10‧‧‧Energy Distribution Parts

11‧‧‧Anchor

11a‧‧‧monostable elastic

11b‧‧‧flexible arm

11c‧‧‧rigid support

12‧‧‧Regulator

14‧‧‧Board

14a‧‧‧Support plate

15‧‧‧Frame

15a‧‧‧hole

16‧‧‧Rotation direction

17‧‧‧tooth

18‧‧‧Ontology

19‧‧‧Side arm

20‧‧‧Side arm

21‧‧‧Stop

22‧‧‧Stop

23‧‧‧Flexible arm

24‧‧‧arm

25‧‧‧Balance Piece

26‧‧‧Ontology

27‧‧‧Flexible arm

28‧‧‧rigid arm

29‧‧‧First adjustment piece

30‧‧‧Second adjustment piece

31‧‧‧Flexible arm

32‧‧‧Ontology

33‧‧‧Side arm

34‧‧‧Free Center Space

35‧‧‧Notch

36‧‧‧Drive arm

37‧‧‧Balance bar

38‧‧‧Central part

39‧‧‧Side arm

40‧‧‧flexible arm

40a‧‧‧Support

41‧‧‧arm

42‧‧‧Head

43‧‧‧Resilient suspension

44‧‧‧rigid pivot

45‧‧‧Center core

46‧‧‧Head

47‧‧‧Rigid Intermediate

48‧‧‧Rigid Intermediate

49‧‧‧flexible arm

50‧‧‧flexible arm

51‧‧‧flexible arm

52‧‧‧Flexible arm

O1‧‧‧Translation direction

O2‧‧‧Translation direction

Y0‧‧‧Symmetry axis

P‧‧‧Rotation Center

Z0‧‧‧Rotation axis

X, Y, Z‧‧‧axis

Claims (16)

A mechanism for a timepiece, comprising: an adjuster, including at least one first adjusting member elastically mounted on a support member for oscillation, an anchor member suitable for engaging with an energy distributing member, the energy distributing member is provided with The tooth is intended to be actuated by an energy storage device, and the anchor is controlled by the first adjustment member to lock and release the energy distribution member regularly and alternately so that the energy distribution member is pushed by the energy storage device A repetitive motion cycle moves gradually, and the anchor is adapted to transfer mechanical energy to the regulator during the repetitive motion cycle, wherein the regulator further includes a second regulator elastically mounted on the support for oscillation , The first adjusting member and the second adjusting member are connected to each other so that they have symmetrical and opposite movements, and the mechanism further includes a balancing member controlled by the second adjusting member so as to interact with the The anchor moves in opposite symmetrical motion. The mechanism for a timepiece according to claim 1, wherein the anchor has a certain mass, and the balance has a mass between 90% and 110% of the mass of the anchor. The mechanism for a timepiece according to claim 1, wherein the first adjustment member and the second adjustment member are mounted on the support member so as to translate and oscillate in a first translation direction. The mechanism for a timepiece according to claim 3, wherein each of the first adjusting member and the second adjusting member is mounted on the support member so as to oscillate in a circular translational reciprocating motion, wherein the circular The reciprocating motion has a first oscillation amplitude in the first translation direction and a non-zero secondary oscillation amplitude perpendicular to the first translation direction. The first adjustment member and the second adjustment member have a The first oscillation amplitude is larger than the secondary oscillation amplitude. The mechanism for a timepiece according to claim 4, wherein the first oscillation amplitude of the first adjustment member and the second adjustment member is at least 10 times larger than the secondary oscillation amplitude. The mechanism for the timepiece according to claim 4, wherein each of the first adjusting member and the second adjusting member is mounted on the support member through two elastic cantilevers substantially perpendicular to the first translation direction. The mechanism for a timepiece according to claim 1, wherein the first adjusting member and the second adjusting member are connected to each other through a pivoting balance bar. The mechanism for a timepiece according to claim 3, wherein the anchor and the balance member are elastically mounted on the support member so as to translate and oscillate in a second translation direction. The mechanism for a timepiece according to claim 8, wherein the second translation direction is substantially perpendicular to the first translation direction. The mechanism for a timepiece according to claim 9, wherein each of the anchor and the balance member is mounted on the support so as to oscillate in a circular translation, wherein the circular translation oscillates in the second translation There is a second oscillation amplitude in the direction and a non-zero secondary oscillation amplitude perpendicular to the second translation direction. The second oscillation amplitude of the anchor and the balance member is greater than that of the secondary oscillation amplitude. Big. The mechanism for a timepiece according to claim 10, wherein the second oscillation amplitude of the anchor and the balance member is at least 10 times larger than the secondary oscillation amplitude. The mechanism for a timepiece according to claim 8, wherein the anchor and the balance are respectively mounted on the support through two elastic cantilevers substantially perpendicular to the second translation direction. The mechanism for a timepiece according to claim 1, wherein the anchor and the balance member are respectively connected to the first adjusting member and the second adjusting member through a first elastic driving arm and a second elastic driving arm . The mechanism for timepieces according to claim 1, wherein the mechanism is monolithic and implemented in a single plate. A watch movement comprising the mechanism for a timepiece and the energy distribution member as described in any one of claim 1 to claim 14. A timepiece comprising the watch movement described in claim 15.

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