Flexible guide assembly for a rotating timepiece resonator mechanism

By employing a fixed support and three flexible guide components arranged in series in the rotary clock resonator mechanism, the problems of insufficient angular travel and the influence of gravity are solved, achieving more efficient and precise motion control and improving the operating performance of the mechanism.

CN117031908BActive Publication Date: 2026-06-26THE SWATCH GRP RES & DEVELONMENT LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THE SWATCH GRP RES & DEVELONMENT LTD
Filing Date
2023-05-08
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

In existing rotary clock resonator mechanisms, flexible guides suffer from insufficient angular travel, lack of parasitic motion control, and significant gravitational influence, which affect the mechanism's efficiency and accuracy.

Method used

An assembly consisting of a fixed support and three flexible guides arranged in series is used. Each flexible guide extends in the same plane around the longitudinal axis. Circular motion is achieved through the bending and stretching deformation of non-crossing flexible blades. The offset is adjusted to control parasitic motion and reduce the effects of gravity.

Benefits of technology

Sufficient angular travel, more precise parasitic motion control, and reduced gravitational effects have been achieved, improving the efficiency and accuracy of the rotary clock resonator mechanism.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117031908B_ABST
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Abstract

The invention relates to a flexible guide assembly comprising a fixed support and three flexible guides arranged in series, wherein a first flexible guide comprises a first movable element relative to the fixed support and a first pair of non-crossing flexible vanes connected to the first movable element, a second flexible guide comprises a second movable element relative to the first movable element and a second pair of non-crossing flexible vanes connecting the second movable element to the first movable element, a third flexible guide comprises a third movable element and a third pair of non-crossing flexible vanes connecting the third movable element to the second movable element, the third movable element forming a balance wheel or a balance wheel support of a rotary resonator mechanism, the first movable element is arranged between the fixed support and the second movable element, the second movable element is arranged between the first movable element and the third movable element, the assembly comprises first and second centers of rotation which are offset by a predetermined distance.
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Description

Technical Field

[0001] This invention relates to a flexible guide assembly for a rotary clock resonator mechanism.

[0002] The present invention also relates to a rotary clock resonator mechanism equipped with such a flexible guide assembly. Background Technology

[0003] Most modern mechanical watches are equipped with a balance spring and a Swiss lever escapement. The balance spring and balance wheel constitute the watch's time base; it is also known as a resonator.

[0004] The escapement mechanism has two main functions:

[0005] - Maintain the reciprocating motion of the resonator;

[0006] - Count these reciprocating motions.

[0007] The Swiss lever escapement has a relatively low energy efficiency (approximately 30%). This inefficiency is caused by the uneven movement of the escapement, which falls or recoils to accommodate machining errors, and several components transmit their motion to each other through inclined planes that rub against each other.

[0008] An inertial element, a guide element, and a resilient restoring element are required to construct a mechanical resonator. Typically, the hairspring acts as the resilient restoring element for the inertial element, which is composed of a balance wheel. This balance wheel is guided by a pivot rotating within a ruby ​​sliding bearing. This introduces friction, resulting in energy loss and operational disturbances that are position-dependent and wish to be eliminated.

[0009] Examples of resonators in which flexible blade guides serve as inertial elements and elastic reset mechanisms are also known. Flexible guides with virtual pivots can significantly improve the efficiency of clock resonators. The simplest is a cross-blade guide consisting of two intersecting straight blades. However, there are also non-cross-blade guides of the RCC (Remote Center Compliance) type with non-intersecting straight blades. Such resonators are described in documents EP 2911012, EP 14199039, and EP 16155039.

[0010] Using a flexible guide allows the pivot and hairspring of the balance wheel to be replaced. This has the advantage of eliminating pivot friction and thus increasing the quality factor of the resonator. However, flexible guides are known to have a short angular travel (approximately 10° to 20°, in contrast to the 300° for the balance wheel mechanism with respect to the hairspring). A long angular travel is required to ensure the proper functioning of numerous mechanical escapements.

[0011] To address this issue, multiple flexible blade guides arranged in series have been envisioned, for example, in documents such as US2018319517, US2019120287, and EP3451072. This results in a significantly increased angular stroke. The advantage of cascading multiple guides is that each guide has a smaller rotational amplitude, which allows for good isochronism and excellent guidance.

[0012] However, some shortcomings still exist, particularly the lack of control over the movement of parasitic guides or the influence of gravity on flexible guides, which remains important. Summary of the Invention

[0013] Therefore, one object of the present invention is to provide a flexible guide for a rotary resonator mechanism that avoids the above-mentioned problems.

[0014] Therefore, the present invention relates to a flexible guide assembly for a rotary resonator mechanism in a watch movement, comprising a fixed support and three flexible guides arranged in series.

[0015] The flexible guide assembly is characterized in that it extends substantially in the same plane about a longitudinal axis, wherein the first flexible guide includes a first movable element relative to a fixed support, and a first pair of non-crossing flexible blades connected to the first movable element, such that the first movable element can move in a circular motion about a center of rotation by the flexion and extension of the first pair of blades; the second flexible guide includes a second movable element relative to the first movable element, and a second pair of non-crossing flexible blades connecting the second movable element to the first movable element, such that the second movable element can move relative to the first movable element and the first movable element in a circular motion about a center of rotation by the flexion and extension of the second pair of blades. The fixed support is movable; the third flexible guide includes a third movable element and a third pair of non-crossing flexible blades connecting the third movable element to the second movable element, such that the third movable element can move relative to the second movable element, the first movable element and the fixed support in a circular motion around a rotation center by the bending and stretching deformation of the third pair of blades. The third movable element forms a balance wheel or balance wheel support of a rotary resonator mechanism. The first movable element is arranged between the fixed support and the second movable element, and the second movable element is arranged between the first movable element and the third movable element. The assembly includes a first rotation center and a second rotation center that are planar and offset from each other by a predetermined distance.

[0016] As a result of this invention, a flexible blade guide assembly can be obtained that has sufficient angular travel, more precise parasitic motion control, and minimizes the influence of gravity on resonator operation.

[0017] In fact, by adjusting the offset between the flexible guide components, the parasitic motion of the flexible guide component assembly can be selected for easier control. Furthermore, since the flexible guide components do not have identical arrangements, this offset minimizes the effects of gravity.

[0018] According to an advantageous embodiment, in the rest position of the assembly, the fixed support extends laterally on both sides of the longitudinal axis, and each blade of the first pair of non-crossing flexible blades is connected to the lateral end of the fixed support so as to move toward each other from the fixed support toward the first movable element.

[0019] According to an advantageous embodiment, in the rest position of the assembly, the third movable element extends laterally on both sides of the longitudinal axis, and each blade of the third pair of non-crossing flexible blades is connected to the lateral end of the third movable element so as to separate from each other from the second movable element toward the third movable element.

[0020] According to an advantageous embodiment, the second and third flexible guides form a wheel-type pivot, and the second and third pairs of non-crossing flexible blades are symmetrical with respect to the second movable element, thereby forming an X shape at the rest position of the assembly.

[0021] According to an advantageous embodiment, in the resting position of the assembly, the second movable element is a basic point element arranged on the longitudinal axis and is used to assemble the second pair of non-crossing flexible blades and the third pair of non-crossing flexible blades.

[0022] According to an advantageous embodiment, a first movable element extends laterally on both sides of the longitudinal axis of the assembly, and each blade of the second pair of non-crossing flexible blades is connected to the lateral end of the first movable element so as to approach each other from the first movable element toward the second movable element.

[0023] According to an advantageous embodiment, the first movable element is a basic point element arranged on the longitudinal axis of the assembly and is used to assemble the first pair of non-crossing flexible blades and the second pair of non-crossing flexible blades.

[0024] According to an advantageous embodiment, in the rest position of the assembly, the second movable element extends laterally on both sides of the longitudinal axis, and each blade of the second pair of non-crossing flexible blades is connected to the lateral end of the second movable element so as to separate from each other from the first movable element toward the second movable element.

[0025] According to an advantageous embodiment, the first movable element is rotatable about a first rotation center, and the second and third movable elements are rotatable about a second rotation center.

[0026] According to an advantageous embodiment, the first and second movable elements are rotatable about a first rotation center, and the third movable element is rotatable about a second rotation center.

[0027] According to an advantageous embodiment, in the rest position of the component, the first rotation center and the second rotation center are arranged on the longitudinal axis, and in the rest position of the component, the centroid of the resonator is preferably also located on the longitudinal axis.

[0028] According to an advantageous embodiment, in the resting position of the assembly, the fixed support and the movable element are symmetrical about the longitudinal axis.

[0029] According to an advantageous embodiment, the flexible guide assembly is integral or made of the same material, preferably silicon.

[0030] The present invention also relates to a rotating resonator mechanism for a watch movement, the rotating resonator mechanism comprising a balance wheel, an escapement wheel, and a flexible guide assembly according to the present invention. Attached Figure Description

[0031] Further features and advantages of the invention will become apparent from the accompanying drawings, which are given by way of non-limiting example only, in which:

[0032] - Figure 1 The flexible guide assembly according to the first embodiment is schematically shown.

[0033] - Figure 2 The diagram schematically illustrates a flexible guide assembly according to a second embodiment of the present invention.

[0034] - Figure 3 The diagram schematically illustrates the balance wheel mounted on the flexible guide assembly in the first embodiment, and

[0035] - Figure 4 The diagram schematically illustrates a mechanism including a flexible guide assembly according to the first embodiment. Detailed Implementation

[0036] Figure 1 A first embodiment of a component 10 with three flexible guides is shown.

[0037] Component 1 includes a fixed support 2 and three flexible guides arranged in series in substantially the same plane. The term "fixed" means that the support is intended to be stationary relative to the movement.

[0038] Component 1 extends on both sides of the longitudinal axis 17. At its resting position, component 1 is symmetrical about the longitudinal axis 17. At the resting position of component 1, each blade in the same pair of blades is symmetrical about the longitudinal axis 17.

[0039] Preferably, the flexible guide assembly 1 is integral or made of the same material, such as silicon.

[0040] The support member 2 has an elongated rectangular plate shape and is arranged laterally relative to the assembly 1. The two ends of the rectangular plate are bent toward the flexible guide. In the middle of the plate, a tab / protrusion 13, substantially perpendicular to the plate, includes at least one aperture, in this case two apertures 14, to allow the plate to be assembled onto a clamp or bridge clamp. The support member extends laterally on both sides of the longitudinal axis 17 of the assembly 1.

[0041] In response to Figure 4 In an alternative embodiment of the flexible guide assembly 40 described in the rotary resonator mechanism 30 shown, the support 2 is connected to the clamping plate or bridge clamping plate via a translation stage 58. The support 52 does not have tabs but has a rearwardly extending arm 56. The arm 56 forms the translation stage 58, which has two flexible blades 54, 55 connecting the arm 56 to the clamping plate or bridge clamping plate 53. The translation stage 58 provides shock resistance to the assembly 40 in at least one direction. Shock resistance in a second direction can be increased by adjusting the width of the arm 56. The three flexible guides are substantially the same as in the first embodiment, except that they serve as a third movable element for the balance wheel. The speed regulating mechanism will be described below.

[0042] exist Figure 1 In this design, the first flexible guide includes a first movable element 3 relative to the support 2, and a first pair of non-crossing flexible blades 6, 7 connecting the support 2 to the first movable element 3. Blades 6, 7 of the first pair of non-crossing flexible blades are connected to the lateral ends of the support 2 so as to separate from each other from the movable element 3 toward the support 2. The flexible blades 6, 7 are connected at the middle of the first movable element 3.

[0043] Therefore, through the bending and stretching deformation of the first pair of flexible blades 6, 7, the first movable element 3 can move relative to the support 2 in a circular motion around the center of rotation. The first movable element 3 has the depicted W shape, with the base of the W oriented toward the support 2 and the end oriented toward the second flexible guide.

[0044] The first movable element 3 extends laterally on both sides of the longitudinal axis 17 of the assembly 1, and the flexible blades 8 and 9 of the second pair of non-crossing blades are connected to the lateral ends of the first movable element 3 so as to separate from each other from the second movable element 4 toward the first movable element 3.

[0045] The second flexible guide includes a second movable element 4 relative to the first movable element 3, and a second pair of non-crossing flexible blades 8, 9 connecting the second movable element 4 to the first movable element 3.

[0046] Therefore, through the bending and stretching deformation of the second pair of flexible blades 8 and 9, the second movable element 4 can move relative to the first movable element 3 in a circular motion around the center of rotation.

[0047] The second movable element 4 is a basic point-shaped element with a smaller size than the first movable element 3. The second movable element 4 has the function of assembling the second pair of flexible blades 8, 9 together with the flexible blades of the third flexible guide.

[0048] The second movable element 4 connects the second pair of non-crossing flexible blades 8, 9 to each blade in the third pair of flexible blades. The second movable element 4 has, for example, a circular shape, on which the flexible blades 8, 9 in the second pair of blades are assembled.

[0049] Component 1 includes a third flexible guide arranged in series downstream of the second flexible guide. The third flexible guide includes a third movable element 5 relative to the second movable element 4, and a third pair of non-crossing flexible blades 11, 12 connecting the third movable element 5 to the second movable element 4.

[0050] Therefore, through the bending and stretching deformation of the third pair of flexible blades 11, 12, the third movable element 5 can move relative to the second movable element 4 in a circular motion around the center of rotation. The third movable element 5 also has the depicted W shape, with its ends oriented toward the second movable element, and the W is arranged substantially parallel to the first movable element 3 in its inverted position. The rear of the W is arranged on the outside of the assembly 1. Thus, in the resting position of the assembly 1, the interiors of these W shapes are arranged to face each other.

[0051] The third movable element 5 also includes a tab 15 extending from the center toward the rear of W. The tab 15 has at least one aperture, here two apertures 16, to allow for the assembly of the balance wheel.

[0052] Therefore, the second flexible guide and the third flexible guide form a wheel-type pivot, and the second pair of non-crossing flexible blades 8, 9 and the third pair of non-crossing flexible blades 11, 12 are symmetrical with respect to the second movable element 4, thereby forming X, with the second movable element 4 at the intersection of X.

[0053] Component 1 includes a first rotation center 18 and a second rotation center 19 offset by a predetermined distance.

[0054] The first rotation center 18 is the rotation center of the first flexible guide. Therefore, the first movable element 3 can move relative to the support 2 in a circular motion around the first rotation center 18.

[0055] The second rotation center 19 is the rotation center of the second flexible guide and the third flexible guide. Therefore, the second movable element 4 and the third movable element 5 can move relative to the first movable element 3 and the second movable element 4 respectively in a circular motion around the second rotation center 19.

[0056] In the resting position of component 1, the rotation centers 18 and 19 are basically arranged at the intersection of the collinear blades in each pair of flexible guides.

[0057] Therefore, the first rotation center 18 is located at the intersection of the collinearity of a pair of blades 6 and 7 of the first flexible guide. Here, the first rotation center 18 is located at the middle of the inner tip of the W-shape of the first movable element 3.

[0058] The second rotation center 19 is located at the intersection of the collinearity of a pair of blades 8 and 9 of the second flexible guide and a pair of blades 11 and 12 of the third flexible guide. Here, the second rotation center 19 is located at the middle of the basic point element of the second movable element.

[0059] Preferably, in the rest position of component 1, the two rotation centers 18 and 19 are arranged on the longitudinal axis 17.

[0060] exist Figure 2 In the second embodiment, assembly 10 includes a support member 22 and three flexible guide members arranged in series in substantially the same plane. Assembly 10 extends laterally on both sides of a longitudinal axis 37. In the rest position, the flexible guide member assembly 10 is symmetrical about the longitudinal axis 37. In the rest position of assembly 10, the blades in the same pair of blades are symmetrical about the longitudinal axis 37.

[0061] Preferably, the flexible guide assembly 10 is integral or made of the same material, such as silicon.

[0062] The support member 22 has the depicted W shape, with its opening and ends oriented toward the first flexible guide. Flexible blades 26, 27 of the first pair of flexible blades are connected to the lateral ends of the support member 22 so as to approach each other from the support member 22 toward the first movable element 23. The support member 22 also includes a tab 33 extending from the tip of the middle portion of the W to the rear portion of the W. The tab 33 has at least one aperture, here two apertures 34, allowing the support member 22 to be assembled onto a clamp or bridge clamp.

[0063] The first flexible guide includes a first movable element 23 relative to the support 22, and a first pair of non-crossing flexible blades 26, 27 connecting the support 22 to the first movable element 23.

[0064] Therefore, through the bending and stretching deformation of the flexible blades 26 and 27 in the first pair of blades, the first movable element 23 can move relative to the support 22 in a circular motion around the center of rotation.

[0065] The first movable element 23 is a basic point-like element with a smaller size compared to other movable elements, which connects the first pair of non-crossing flexible blades and the second pair of non-crossing flexible blades. The first movable element 23 has, for example, a semi-circular shape, the circular portion of which receives the flexible blades 26 and 27 of the first pair of flexible blades.

[0066] The second flexible guide includes a second movable element 24 relative to the first movable element 23, and a second pair of non-crossing flexible blades 28, 29 connecting the second movable element 24 to the first movable element 23.

[0067] Therefore, through the bending and stretching deformation of the second pair of flexible blades 28, 29, the second movable element 24 can move relative to the first movable element 23 in a circular motion around the center of rotation.

[0068] The second movable element 24 extends laterally on both sides of the longitudinal axis 37 of the assembly 10. Flexible blades 28 and 29 of the second pair of non-crossing flexible blades are connected to the lateral ends of the second movable element so as to separate from each other from the first movable element 23 toward the second movable element 24. The second movable element 24 is V-shaped, with its ends curving inward toward the first flexible guide. The tip of the V is oriented toward the third flexible guide, while the opening of the V is oriented toward the first flexible guide.

[0069] Component 10 includes a third flexible guide arranged in series downstream of the second flexible guide. The third flexible guide includes a third movable element 25 relative to the second movable element 24, and a third pair of non-crossing flexible blades 31, 32 connecting the third movable element 25 to the second movable element 24.

[0070] Therefore, through the bending and stretching deformation of the third pair of flexible blades 31, 32, the third movable element 25 can move relative to the second movable element 24 in a circular motion about the center of rotation. The third movable element 25 also has the depicted W shape, with its ends oriented toward the second movable element 24, and the W is arranged substantially parallel to the first movable element 93 in its inverted position so as to face the V-shaped tip of the second movable element 24. The third movable element 25 also includes a tab 35 extending from the middle to the rear of the W. The tab 35 has at least one aperture, here two apertures 36, thereby enabling the balance wheel to be assembled onto the third movable element 25. The flexible blades in the third pair of blades are separated from each other from the V-shaped tip toward the curved end of the third movable element 25.

[0071] Component 10 includes a first rotation center 38 and a second rotation center 39 offset by a predetermined distance.

[0072] The first rotation center 38 is the rotation center of the first and second flexible guides. Therefore, the first movable element 23 and the second movable element 24 can move relative to the support 22 and the first movable element 23 respectively in a circular motion around the first rotation center 38.

[0073] The second rotation center 39 is the rotation center of the third flexible guide. Therefore, the third movable element 25 can move relative to the second movable element 24 in a circular motion around the second rotation center 39.

[0074] At the resting position of component 10, rotation centers 38 and 39 are basically arranged at the intersection of the collinearity of each pair of blades of each flexible guide.

[0075] Therefore, the first rotation center 38 is located at the intersection of the collinearity of a pair of blades 26 and 27 of the first flexible guide and the collinearity of a pair of blades 28 and 29 of the second flexible guide. Here, the first rotation center 38 is located near the first movable element 23.

[0076] The second rotation center 39 is located at the intersection of the collinearity of a pair of blades 31 and 32 of the third flexible guide. Here, the second rotation center 39 is located at the tip of the V-shape of the second movable element 24.

[0077] Preferably, in the rest position of component 10, the two rotation centers 38 and 39 are arranged on the longitudinal axis 37.

[0078] The present invention also relates to a rotary watch resonator mechanism. This resonator mechanism is equipped with a balance wheel and a flexible guide assembly such as one of the embodiments described above.

[0079] exist Figure 3 The image shows a first embodiment of a rotary resonator mechanism 20, which includes a flexible guide assembly 1 and a balance wheel 50 according to the first embodiment. The balance wheel 50 is bone-shaped, having a longitudinal section 48 and units 41, 42 at each end of the longitudinal section 48. Each unit 41, 42 is substantially parallelepiped in shape. Each unit 41, 42 includes two adjusting screws 43, 44 arranged at the corners opposite the longitudinal section 48. The screws 43, 44 are used to adjust the imbalance and moment of inertia of the balance wheel 50.

[0080] The balance wheel 50 includes a ring 49 disposed in the middle of the longitudinal section 48, and a tab 47 preferably extending orthogonally to the longitudinal section 48. The tab mates with two orifices of the flexible guide assembly 1 so that the balance wheel 50 can be assembled with the tab of the third movable element of the flexible guide assembly 1.

[0081] Ring 49 allows for engagement with a seismic barrier in the event of severe vibration. This barrier, not shown in the figure, is positioned, for example, on a clamping plate or bridge clamp. This barrier prevents one or more flexible blades of the flexible guide assembly 1 from breaking.

[0082] The balance wheel 50 is oriented perpendicular to the longitudinal axis 17 of the flexible guide assembly 1. The tab 47 enables the balance wheel to be recentered substantially toward the center of the flexible guide assembly 1.

[0083] The moment of inertia of the balance wheel 50 about the longitudinal axis 17 of the assembly 1 is greater than the moment of inertia about its own longitudinal axis 51. Therefore, the balance wheel 50 oscillates perpendicular to the longitudinal axis 17 of the assembly 1.

[0084] As a result of the flexible guide assembly 1 according to the invention, the balance wheel 50 is able to oscillate and actuate the rotating clock resonator mechanism.

[0085] Figure 4 The second embodiment of the rotary clock resonator mechanism 30 shown includes an alternative embodiment 40 to the first embodiment of the flexible guide assembly, wherein the support 52 is connected to the clamp or bridge clamp 53 via a translation stage 58.

[0086] The rotary resonator mechanism 30 also includes a balance wheel 70 and an escape wheel 55.

[0087] The escape wheel 55 has a circular shape and includes multiple peripheral teeth 62.

[0088] The balance wheel 70 has an elliptical ring shape, with a portion 60 curved inward. Therefore, the ring includes a main portion 63 with a radius of curvature inside the ring, and a curved portion 60 with a radius of curvature outside the ring. Here, the main portion 63 defines three-quarters of the ring's circumference, and the curved portion 60 defines one-quarter of the ring's circumference.

[0089] The balance wheel 70 also includes two pallets 59, 61 that engage with the teeth 62 of the escape wheel 55 to alternately lock and allow the escape wheel 55 to rotate at a predetermined frequency. The ring and pallets 59, 61 are, for example, integral or formed of the same material. Optionally, the pallets are elements mounted on the ring, and the pallets are, for example, formed of jewels embedded in the ring.

[0090] The curved portion 60 partially surrounds the escape wheel 55 and includes two pallets 59 and 61 arranged on both sides of the escape wheel 55. Therefore, when the balance wheel oscillates, the balance wheel moves the pallets 59 and 61 alternately closer to and further away from the escape wheel 55 so as to alternately engage with the teeth 62 of the escape wheel 55.

[0091] The flexible guide assembly 1 is arranged inside the ring of the balance wheel 70.

[0092] In this embodiment, the third movable element is the balance wheel 70. Therefore, the flexible blades 11, 12 of the third pair of blades are connected to the balance wheel 70 inside the ring, and in particular to the curved portion 62.

[0093] The curved portion 62 includes one side of the depicted W shape, with its opening oriented toward the flexible guide assembly 40 and opposite the escape wheel 55. The W includes two curved ends, allowing it to be assembled with the flexible blades 11, 12 of the third pair of blades extending from the second movable element 3.

[0094] The balance wheel 70 includes imbalance adjustment discs, specifically two pairs of discs 64, 65 arranged on each side of the main portion 63 of the ring. These discs are rotationally adjustable inertia blocks, allowing adjustment of the balance wheel's inertia and imbalance. These discs can be made of metal, such as NiP. They can have the same amount of imbalance to allow adjustment of the running and the center of mass position of the balance wheel 70. Alternatively, a pair of discs with a larger imbalance can be selected for coarse running adjustments, and a pair of discs with a smaller imbalance for fine running adjustments. These discs are arranged close to a vertical axis 67 perpendicular to the longitudinal axis 57, such that the balance wheel 70 has a higher moment of inertia about the longitudinal axis 57 and a lower moment of inertia about the vertical axis 67. This allows the resonant frequencies of undesirable modes to be moved away from the main resonance of the balance wheel 70.

[0095] In an alternative embodiment not shown in the figures, a separate balance wheel escape fork forms the mechanical connection between the balance wheel and the escape wheel. For this purpose, an impact pin, preferably made of ruby, is arranged perpendicular to the plane of the ring and within a hole in the middle of the curved portion. The impact pin engages with the fork head of the escape fork to actuate the escape wheel, as in a conventional escapement mechanism. In this alternative, the balance wheel does not include a fork pad.

[0096] It goes without saying that the present invention is not limited to the embodiments described with reference to the accompanying drawings, and alternatives may be considered without departing from the scope of the invention.

Claims

1. A flexible guide assembly (1, 10, 40) for a rotary resonator mechanism (20, 30) in a watch movement, the flexible guide assembly (1, 10, 40) comprising a fixed support (2, 22, 52) and three flexible guides arranged in series, characterized in that, The flexible guide assembly (1, 10, 40) extends substantially in the same plane about longitudinal axes (17, 37, 57), wherein the first flexible guide includes a first movable element (3, 23) relative to the fixed support (2, 22, 52), and a first pair of non-crossing flexible blades (6, 7, 26, 27) connected to the first movable element (3, 23), such that the first movable element (3, 23) can move in a circular motion about a first rotation center (18, 38) by the flexural deformation of the first pair of non-crossing flexible blades (6, 7, 26, 27); the second flexible guide includes a... For the second movable element (4, 24) of the first movable element (3, 23), and the second pair of non-crossing flexible blades (8, 9, 28, 29) connecting the second movable element (4, 24) to the first movable element (3, 23), the second movable element (4, 24) is able to move relative to the first movable element (3, 23) and relative to the fixed support (2, 22, 52) in a circular motion about a second rotation center (19, 39) by means of the flexural deformation of the second pair of non-crossing flexible blades (8, 9, 28, 29); the third flexible guide includes a third movable element. The third movable element (5, 25) is connected to the second movable element (4, 24) by a third pair of non-crossing flexible blades (11, 12, 31, 32), such that the third movable element (5, 25) is movable relative to the second movable element (4, 24), the first movable element (3, 23), and the fixed support (2, 22, 52) in a circular motion about the second rotation center (19, 39) by the flexural deformation of the third pair of non-crossing flexible blades (11, 12, 31, 32), and the third movable element (5, 25) forms the rotation. The rotary resonator mechanism (20, 30) has a balance wheel or balance wheel support, the first movable element (3, 23) is arranged between the fixed support (2, 22, 52) and the second movable element (4, 24), the second movable element (4, 24) is arranged between the first movable element (3, 23) and the third movable element (5, 25), and the flexible guide assembly (1, 10, 40) includes a first rotation center (18, 38) and a second rotation center (19, 39) that are planar to the flexible guide assembly (1, 10, 40) and offset from the longitudinal axis by a predetermined distance.

2. The flexible guide component assembly according to claim 1, characterized in that, At the resting position of the flexible guide assembly (1, 10, 40), the fixed support (2, 22, 52) extends laterally on both sides of the longitudinal axis (17, 37, 57), and each blade (6, 7, 26, 27) of the first pair of non-crossing flexible blades is connected to the lateral end of the fixed support (2, 22, 52) so as to move closer to each other from the fixed support (2, 22, 52) toward the first movable element (3, 23).

3. The flexible guide assembly according to claim 1 or 2, characterized in that, At the resting position of the flexible guide assembly (1, 10, 40), the third movable element (5, 25) extends laterally on both sides of the longitudinal axis (17, 37, 57), and each blade (11, 12, 31, 32) of the third pair of non-crossing flexible blades is connected to the lateral end of the third movable element (5, 25) so as to separate from each other from the second movable element (4, 24) toward the third movable element (5, 25).

4. The flexible guide assembly according to any one of claims 1 to 3, characterized in that, The second flexible guide and the third flexible guide form a wheel-type pivot, and the second pair of non-crossing flexible blades (8, 9) and the third pair of non-crossing flexible blades (11, 12) are symmetrical with respect to the second movable element (4), thereby forming an X shape at the rest position of the flexible guide assembly (1, 40).

5. The flexible guide assembly according to claim 4, characterized in that, At the resting position of the flexible guide assembly (1, 40), the second movable element (4) is a basic point element arranged on the longitudinal axis (17, 57) and is used to assemble the second pair of non-crossing flexible blades (8, 9) and the third pair of non-crossing flexible blades (11, 12).

6. The flexible guide assembly according to claim 5, characterized in that, The first movable element (3) extends laterally on both sides of the longitudinal axis (17, 37, 57) of the flexible guide assembly (1, 10, 40), and each blade (8, 9) of the second pair of non-crossing flexible blades is connected to the lateral end of the first movable element (3) so as to move closer to each other from the first movable element (3) toward the second movable element (4).

7. The flexible guide assembly according to any one of claims 1 to 4, characterized in that, The first movable element (23) is a basic point element arranged on the longitudinal axis (37) of the flexible guide assembly (10) and is used to assemble the second pair of non-crossing flexible blades (26, 27) and the third pair of non-crossing flexible blades (28, 29).

8. The flexible guide assembly according to claim 7, characterized in that, At the rest position of the flexible guide assembly (10), the second movable element (24) extends laterally on both sides of the longitudinal axis (37), and each blade (28, 29) of the second pair of non-crossing flexible blades is connected to the lateral end of the second movable element (24) so ​​as to separate from each other from the first movable element (23) toward the second movable element (24).

9. The flexible guide assembly according to any one of claims 1 to 8, characterized in that, The first movable element (3) is capable of rotating around the first rotation center (18), and the second movable element (4) and the third movable element (5) are capable of rotating around the second rotation center (19).

10. The flexible guide assembly according to any one of claims 1 to 8, characterized in that, The first movable element (23) and the second movable element (24) are capable of rotating around the first rotation center (38), and the third movable element (25) is capable of rotating around the second rotation center (39).

11. The flexible guide assembly according to any one of claims 1 to 10, characterized in that, At the resting position of the flexible guide assembly (1, 10, 40), the first rotation center (18, 38) and the second rotation center (19, 39) are arranged on the longitudinal axis (17, 37, 57), and at the resting position of the flexible guide assembly (1, 10, 40), the centroid (M) of the resonator is also located on the longitudinal axis (17, 37, 57).

12. The flexible guide assembly according to any one of claims 1 to 11, characterized in that, At the resting position of the flexible guide assembly (1, 10, 40), the fixed support (2, 22, 52) and the movable element (3, 4, 5, 23, 24, 25) are symmetrical about the longitudinal axis (17, 37, 57).

13. The flexible guide assembly according to any one of claims 1 to 12, characterized in that, The flexible guide components (1, 10, 40) are either integral or made of the same material.

14. A rotary resonator mechanism (20, 30) for a watch movement, comprising a balance wheel (50, 70) and an escapement wheel (55), characterized in that, The rotary resonator mechanism includes the flexible guide assembly (1, 10, 40) according to any one of claims 1 to 13.