Timepiece bearings

Abstract

To provide a bearing for a timepiece, the bearing having small dimensions and allowing the staff of a timepiece component to be repositioned extremely efficiently at all times.SOLUTION: In a bearing 1 for a timepiece, a stressed, compact assembly 10 includes: a first resilient member 3 attached into a first orifice 9a; a second resilient member 6 arranged between the first resilient member 3 and a second orifice; a pivot element 5 positioned to face the second orifice; and an endstone element 4 interposed between the first and second resilient members 3, 6. The endstone element 4 comprises a central part 13a and a peripheral part 13b, the central part 13a having a cavity capable of receiving a part of the pivot element 5 therein, and the peripheral part 13b having a contact zone 23 configured to bear against an entire periphery of a flat upper face of the second resilient member 6.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] Some embodiments of the present invention relate to a timepiece bearing, in particular a shock-absorbing bearing, for a timepiece component staff. The invention further relates to a timepiece movement comprising such a bearing. The invention further relates to a timepiece comprising such a bearing and / or such a timepiece movement. [Background technology]

[0002] In a timepiece, a timepiece component, typically a staff, has pivots at both ends that rotate in bearings attached to a blank, such as a plate, or a bridge of the timepiece movement. In some timepiece components, particularly balances, it is common to fit bearings with shock-absorbing mechanisms, because the pivots of the balance staff are usually slender and the weight of the balance is relatively large, so that without a shock-absorbing mechanism the pivots may break under the effect of a shock.

[0003] In the prior art, traditional shock-absorbing bearings typically include a bushing, such as a perforated jewel, with a through hole that forms an axial and radial guide element for the pivot. Such a jewel is inserted into a bearing support, commonly called a setting, on which an end stone is mounted to form an axial stop for the pivot. This setting is intended to convert radial shocks into axial shocks. Such a setting is held against the back of the bearing housing by a resilient means, usually a damping spring, that applies axial stress to the top of the end stone. The staff pivot is inserted into the through hole formed in the perforated jewel. Such bearings absorb shocks because the assembly formed by the setting, perforated jewel, and end stone is able to move thanks to the damping spring.

[0004] However, one of the main challenges of such bearings is their low robustness, particularly due to the aging and degradation of the lubricant they contain. This alters the bearing's behavior and reduces its reliability. Consequently, such bearings do not ensure perfect radial re-centering of the balance staff when subjected to an impact, since such re-centering is often random. The problem here is based on the movement's rate being set at a specific moment T in a specific shock-resistant configuration. After an impact, for example, imperfect centering alters the bearing configuration, making the previously achieved rate adjustment less optimal. Therefore, the position of the balance staff directly affects the movement's rate, and therefore, this centering error must be addressed to improve chronometric stability. Summary of the Invention [Problem to be solved by the invention]

[0005] One of the objects of the present invention is to provide a bearing for a timepiece which is small in size and which makes it possible to always very efficiently reposition the staff of the timepiece components.

[0006] Another object of the present invention is to provide a bearing for repeatable stuffing of timepiece components.

[0007] Another object of the present invention is to provide a bearing with small dimensions. [Means for solving the problem]

[0008] In this context, the invention relates to a timepiece bearing comprising a bearing housing formed with a through opening in which a stressed compact assembly is located, said compact assembly comprising a first elastic member mounted in a first orifice of the through opening, a second elastic member arranged between the first elastic member and a second orifice of the through opening, a pivot element intended for rotating a staff of a timepiece component and arranged in a central region of the second elastic member facing the second orifice, and an end stone element arranged between the first and second elastic members and intended to receive an end portion of the staff of the component, through which the staff of the component can be inserted into the through opening, said end stone element comprising a central part and a peripheral part, said central part having a cavity in which part of the pivot element can be placed, and said peripheral part having a contact area adapted to bear against the entire periphery of the flat upper surface of the second elastic member.

[0009] Other embodiments have the following features. - said central portion and said peripheral portion respectively form the tip and base of said endstone element; - the end stone element is mounted so as to be able to move axially within the through opening relative to the axis of rotation of the through opening; - the central portion of the endstone element is configured to penetrate into the first orifice of the through opening upon the occurrence of an impact to which the timepiece may be subjected. - the periphery of the endstone element has a stop area adapted to interact with the first elastic member in the event of an impact to which the timepiece may be subjected; a portion of the pivot element disposed within the cavity protrudes from the central region of the second elastic member, the portion having an outer surface disposed near the rear of the cavity; the first resilient member is configured to deform generally axially relative to an axis of rotation of the through opening; - the first elastic member has a clamping element for clamping and fixing the first elastic member in the through opening, a stress-applying element intended to rest against the central part of the end stone element, and a connecting element connecting the stress-applying element and the clamping element to each other. - the second elastic member has a connecting portion for connecting the second elastic member in the through opening and a clamping portion for clamping and fixing the pivot element in a central region of the second elastic member, the connecting portion and the clamping portion being connected to each other by at least one elastic element of the second elastic member. - the second resilient member is fixedly mounted within the bearing housing; the second resilient member is configured to deform in a generally radial direction relative to the axis of rotation of the through opening; The bearing housing, the through opening, the first and second resilient members, the endstone element, and the pivot element have axes of rotation that coincide with a central axis of the bearing.

[0010] Another aspect of the invention relates to a timepiece movement fitted with such a bearing.

[0011] Another aspect of the present invention relates to a timepiece equipped with such a timepiece movement.

[0012] Other characteristics and advantages of the invention will appear more clearly on reading the following description of particular embodiments of the invention, given by way of example with reference to the accompanying drawings, in which: [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view of a bearing for a timepiece according to an embodiment of the present invention; [Figure 2]2 is a top view of the bearing shown in FIG. 1 according to an embodiment of the present invention. FIG. [Figure 3] 3 is a cross-sectional view of the bearing shown in FIG. 2 according to an embodiment of the present invention along axis III-III. [Figure 4] FIG. 1 is an exploded view of all the parts that form a bearing according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] 1 to 4 show an embodiment of a bearing 1 for a timepiece such as a portable timepiece (e.g., a wristwatch or a pocket watch), in particular a wristwatch. Such a bearing 1 can be part of the timing mechanism of a timepiece movement such as an electronic movement or a mechanical movement. By way of example, the timing mechanism can be a spring-loaded balanced oscillator comprising a balance and a spring.

[0015] This bearing 1, also called a "timepiece bearing", "shock-resistant bearing" or "shock-absorbing bearing", is particularly suitable for rotating ceramic or glass staffs, in particular staff pivots. Such staffs are also called "rotating staffs", "pivoting staffs" or "arbors", and can be the staffs of timepiece components, also called "staffs of rotating moving parts", such as balance pivot shanks when the timepiece mechanism is an oscillator.

[0016] Such a bearing 1 is effectively configured to guide the staff of a timepiece component rotatably about the central axis A1 of the bearing 1, also called the axis A1 of the mounted bearing, and to stop translational movements of this staff, in particular to limit axial and / or radial translational movements relative to the axis A1.

[0017] It should be noted that guiding the staff of this timepiece component also results in guiding the timepiece component itself, the axial and / or radial translational movements of the component relative to the axis A1 being limited by virtue of this bearing 1.

[0018] Such a bearing 1 is intended to be assembled or rigidly connected to a bridge-like blank of a timepiece movement, for example a balance bridge or plate, or alternatively, the bearing 1 can be formed directly in the body of the plate or bridge, for example by machining.

[0019] Referring to Figure 4, the bearing 1 includes a bearing housing 2 configured to receive a compact assembly 10 of components comprising a pivot element 5, an endstone element 4, and first and second resilient members 3, 6.

[0020] The bearing housing 2 has a through-opening 8, also called the "central through-opening", which is oriented parallel to the axis of rotation A2 of the bearing housing 2, also called the axis of the bearing unit. At each end of this through-opening 8 there are first and second orifices 9a, 9b. The cross-section of the first orifice 9a is preferably larger than that of the second orifice 9b. As will be explained below, the first orifice 9a is designed to serve to mount the first elastic member 3 within the through-opening 8, while the second orifice 9b is designed to allow a staff of a timepiece component to be inserted into this same through-opening 8.

[0021] In this bearing housing 2, the through opening 8 has an axis of rotation A3 that coincides with the central axis A1 of the bearing 1, which is also called the axis of the through opening 8. Such through opening 8 has the shape of a solid of revolution about this axis A3, which forms a bed or enclosure for this bearing housing 2. Note that this bed corresponds to the volume formed in the bearing housing 2 by the inner peripheral wall 20 of the through opening 8 shown in Figure 4. Therefore, in this configuration, such a bed is formed between the first orifice 9a and the second orifice 9b, which form part of such a bed.

[0022] In this bearing 1, the through opening 8 is configured to receive or contribute to the formation or mounting of a compact assembly 10 in the bearing housing 2. In this configuration, the compact assembly 10 has mounting areas 11a, 21a, 22a, 22b that are intended to cooperate with the inner peripheral wall 20 of the through opening 8 to ensure the placement of the compact assembly 10 within the bearing housing 2. These mounting areas 11a, 21a, 22a, 22b are located within / on the first and second elastic members 3, 6 of the assembly 10. In an alternative embodiment, these mounting areas 11a, 21a, 22a, 22b are located exclusively within / on the first and second elastic members 3, 6. That is, these mounting areas 11a, 21a, 22a, 22b are the only parts of the compact assembly 10 that perform / ensure the mounting of the compact assembly 10 within the bearing housing 2 to form the bearing 1. As will be explained later, these mounting areas 11a, 21a, 22a, 22b interface with the bearing housing 2 by being supported by and / or fastened to the housing 2.

[0023] In this assembly, the pivot element 5, the endstone element 4, the first resilient member 3, and the second resilient member 6 have central axes A4, A5, A6, and A7, respectively, which coincide with the axis A1 of the bearing 1, the axis A2 of the bearing housing 2, and the axis A3 of the through opening 8, respectively, when the compact assembly 10 is mounted within the bearing housing 2.

[0024] As already mentioned, this compact assembly 10 is formed by a group of components consisting of a first elastic member 3, an endstone element 4 and a second elastic member 6 with a pivot element 5 thereon.

[0025] The first elastic member 3 is, for example, an elastic element of the return spring type, intended to elastically return the endstone element 4, and thus the staff of the timepiece component, into the through opening 8 of the bearing housing 2 and to properly displace it axially after the timepiece, in particular the timepiece movement of this timepiece, has been subjected to a substantially axial shock. The first elastic member 3 is thus configured to deform substantially axially relative to the axis of rotation A3 of the through opening 8. This means that the first elastic member 3 is configured to always axially reposition the staff of the timepiece component in the same place, which is configured to absorb a large amount of axial shock. It can therefore be seen that the first elastic member 3 is configured to, upon such a shock, place the staff of the timepiece component in its initial or rest position, axially relative to the axis of rotation A3.

[0026] Such a first elastic member 3 is rigidly connected or clamped to the bearing housing 2. In particular, this first elastic member 3 is mounted in the first orifice 9a of the through opening 8. For this purpose, this first elastic member 3 has at least one connecting element 11c, at least one stress-applying element 11b and at least one clamping element 11a, which are connected to one another.

[0027] In particular, the first elastic member 3 has clamping elements 11a, also called "rigid connecting elements," which are configured to be placed in notches 12 formed in the first orifices 9a of the opening 8. Referring to FIG. 4, the first elastic member 3 has two clamping elements 11a, each of which is configured to be placed in a notch 12 formed in the through opening 8 and contributes to mounting the first elastic member 3 within this through opening 8. These clamping elements 11a form part of the mounting areas 11a, 21a, 22a, 22b of the assembly 10 within the bearing housing 2.

[0028] The first elastic member 3 further comprises stress-applying elements 11b in contact with the end stone element 4. In particular, the stress-applying elements 11b are intended to rest against the central portion 13a of the end stone element 4, in particular on the tip portion 13a of this end stone element 4. These stress-applying elements 11b are configured to apply a substantially axial restoring force, in particular an axial elastic force, to this end stone element 4. With reference to Figure 4, this first elastic member 3 preferably comprises two stress-applying elements 11b.

[0029] The first elastic member 3 further includes a connecting element 11c that connects the stress-applying element 11b and the tightening element 11a. As shown in Figure 4, the first elastic member 3 includes two connecting elements 11c.

[0030] In this compact assembly 10, the end stone element 4 is intended to receive the end of the staff of the timepiece component corresponding to the end of the pivot and to constitute an abutment for this staff end. In the through opening 8, the end stone element 4 is arranged between the first and second elastic members 3, 6. Such an end stone element 4 is mounted in this through opening 8 so as to be movable axially and radially relative to the axis of rotation A3 of this through opening 8.

[0031] The end stone element 4 has a central portion 13a, a peripheral portion 13b, an inner surface 14a, and an outer surface 14b. In the end stone element 4, the central portion 13a is surrounded by the peripheral portion 13b. The end stone element 4 has a step region 13c connecting the central portion 13a and the peripheral portion 13b, which can be seen on the outer surface 14b of the end stone element 4 shown in Figures 3 and 4. In this configuration, the central portion 13a and the peripheral portion 13b form the tip portion 13a and the base portion 13b of the end stone element 4, respectively.

[0032] On the inner surface 14a of this endstone element 4, in the central portion 13a, there is a cavity 15, shown in Figure 3, in which part of the pivot element 5 can be placed, as will be explained later. On this inner surface 14a, the peripheral portion 13b has a contact area 23 adapted to bear directly against the outer annular portion of the flat upper surface of the second elastic member 6. In an alternative embodiment, the contact area 23 is adapted to bear directly against the entire periphery of the flat upper surface of the second elastic member 6. It should be noted that such a cavity 15 can be produced by machining, in particular by traditional machining with diamond tools, or by laser machining.

[0033] As mentioned above, the central portion 13a and the peripheral portion 13b respectively form the tip portion 13a and the base portion 13b of this endstone element 4. This tip portion 13a is configured / shaped to penetrate into the first elastic member 3, in particular into the space formed inside the first elastic member 3, in particular in the event of a substantially axial impact to which the timepiece may be subjected, this space being delimited by the connecting element 11c of this first elastic member 3. This base portion 13b is configured to form a stop area for the endstone element 4 by cooperating with the first elastic member 3 in the event of such an impact. In fact, this stop area is formed in a portion of the outer surface 14b of the endstone element 4 located at this base portion 13b. In this configuration, this stop area, in cooperation with the connecting element 11c and the tightening element 11a, is able to limit the axial displacement of the staff of the timepiece component in the event of an impact, in particular a strong substantially axial impact.

[0034] Such endstone elements 4 can be, for example, synthetic precious stones, or endstones made of monocrystalline or non-polycrystalline materials such as ruby ​​or zirconia, or elements made of metallic or silicon-based materials (for example, monocrystalline or polycrystalline silicon, its oxides, nitrides or carbides, which can also be monocrystalline or polycrystalline).

[0035] In this compact assembly 10, the pivot element 5 is intended to rotate the staff of the timepiece component. The pivot element 5 has a central hole 17 for receiving the staff of the timepiece component, in particular the end of the staff. The pivot element 5 is arranged in the central region of the second elastic member 6 and positioned opposite the second orifice 9b, through which the staff of the timepiece component can be inserted into the through-opening 8. Such pivot element 5 has an upper surface 18a, a side surface 18b, and a lower surface 18c, with the side surface 18b connecting the upper surface 18a and the lower surface 18c. In this configuration, the upper surface 18a of the pivot element 5 faces the inner surface 14a of the endstone element 4, and the lower surface 18c of the pivot element 5 is positioned opposite the second orifice 9b. In particular, this pivot element 5 has a portion that protrudes from the second elastic member 6 that is positioned within the cavity 15 of the end stone element 4, with the upper surface 18a of the pivot element 5 being positioned near the back 16 of the cavity 15.

[0036] Such pivot elements 5, also called "bushings", can be perforated jewels, which are typically made of synthetic precious stones, or of materials that are not monocrystalline or polycrystalline, such as ruby ​​or zirconia, or of silicon-based materials (e.g. monocrystalline or polycrystalline silicon, its oxides, nitrides or carbides, which can also be monocrystalline or polycrystalline), or of metal rings.

[0037] In this compact assembly 10, the second elastic member 6 is fixedly arranged / mounted within the through opening 8, and therefore within the bearing housing 2. In this through opening 8, the second elastic member 6 is arranged on a shoulder upper surface 19 included in an inner peripheral wall 20 of the through opening 8. Note that this shoulder upper surface 19 is located at the bottom of the orifice 9a and is perpendicular to the surface of the inner peripheral wall 20.

[0038] In this assembly 10, the second elastic member 6 is configured to deform in a substantially radial direction relative to the rotation axis A3 of the through opening 8. In other words, the second elastic member 6 is configured to absorb a radial shock, thereby moving the staff of the timepiece component in the radial direction, always at the same location.

[0039] In particular, the second elastic member 6 has a connection portion 21a for connection to the inner peripheral wall 20 of the through opening 8 and a fastening portion 21b for fastening the pivot element 5 in a central region of the second elastic member 6, the connection portion 21a and the fastening portion 21b being connected to each other by at least one elastic element 21c of the second elastic member 6. The connection portion 21a and the fastening portion 21b are stiffer portions of the second elastic member 6 than the elastic element 21c. The connection portion 21a and the fastening portion 21b are susceptible to elastic deformation when subjected to stress.

[0040] The at least one elastic element 21c is configured to ensure radial deformation of the second elastic member 6 by controlling the displacement of the clamping portion 21b relative to the connecting portion 21a when the movement is subjected to an impact, i.e. the elastic element 21c is configured in its initial or rest position to position the connecting portion 21a, the pivot element 5 or the staff of the timepiece component radially relative to the axis of rotation A3 in response to an impact.

[0041] The second resilient member 6 also preferably has flat upper and lower surfaces that are substantially parallel to one another.

[0042] The connecting portion 21a forms the outer peripheral wall of the second elastic member 6. In this configuration, when the second elastic member 6 is attached within the through opening 8, a side surface 22a of the peripheral wall, and therefore of the connecting portion 21a, rests on all or part of the inner peripheral wall 20 of the through opening 8. In particular, the connecting portion 21a is configured to be elastically deformed when the second elastic member 6 is inserted within the through opening 8. At this time, the connecting portion 21a can be supported by its side surface 22a on the inner peripheral wall 20 of the opening 8. For example, the second elastic member 6 can be inserted into the through opening 8 by being driven in.

[0043] The connecting portion 21a further has a contact surface 22b configured to cooperate with the shoulder upper surface 19 in the through opening 8. Referring to the above example, the second elastic member 6 is inserted into the through opening 8 by being pushed in through the through opening 8 until it abuts against the shoulder upper surface 19 of the through opening 8 via the contact surface 22b of the connecting portion 21a. The contact surface 22b is on the flat lower surface of the second elastic member 6.

[0044] It can therefore be seen that such connecting portion 21 a makes it possible to position / attach the second elastic member 6 in a fixed manner within the through opening 8, i.e., this connecting portion 21 a contributes to ensuring that the second elastic member 6 is clamped or held in place with sufficient strength to prevent axial, radial and / or angular displacement of this second elastic member 6 relative to the rotation axis A3 of the through opening 8.

[0045] The connecting portion 21a forms part of the mounting areas 11a, 21a, 22a, 22b of the compact assembly 10 in the bearing housing 2. That is, the mounting areas 11a, 21a, 22a, 22b include the contact surface 22b and the side surface 22a of the connecting portion 21a.

[0046] The connecting portion 21a further has a support surface 22c which forms / includes a flat upper outer annulus adapted to cooperate with the contact area 23 of the end stone element 4. In fact, the base 13b of the end stone element 4 can bear directly on this support surface 22c. In the connecting portion 21a, this support surface 22c is arranged above or perpendicular to the contact surface 22b, and is also substantially parallel to the contact surface 22b.

[0047] As already mentioned, the second elastic member 6 further has a portion 21b for clamping and fixing the pivot element 5 in the central region of the second elastic member 6. This mounting portion 21b forms the inner peripheral wall of the second elastic member 6. The pivot element 5 can be a portion mounted on the second elastic member 6 such that its side surface 18b is connected to this inner peripheral wall in whole or in part. Such connection can be made by snap-in, adhesive or welding.

[0048] It should be noted that in an alternative embodiment, the pivot element 5 can be an integral part of the second elastic member 6 by being made integral with the fastening portion 21b. In this configuration, the central region of the second elastic member 6 is considered to be / form the pivot element 5.

[0049] This second elastic member 6 can be made using a deep reactive ion etching process (usually referred to by its acronym "DRIE"), especially for a second elastic member 6 comprising silicon, or using a Liga process such as UV-Liga, for example for a nickel-based second elastic member 6.

[0050] Such a bearing 1 according to the invention therefore has smaller / reduced overall dimensions compared to prior art bearings, without affecting the operation of said bearing 1. This small size is achieved in particular by the compact assembly 10 formed by the first and second elastic members 3, 6, the endstone element 4 and the pivot element 5, and more precisely by: a particular shape of the end stone element 4, which allows the central portion 13a, in this case the tip portion 13a, of the end stone element 4 to move within the first orifice 9a of the through opening 8 in the bearing housing 2; - a particular shape of the end stone element 4, which allows the base 13b of the end stone element 4 to rest directly on the flat upper surface of the second elastic member 6, perpendicular to the shoulder upper surface 19; the presence of a cavity 15 inside the inner surface 14a of the end stone element 4, in which part of the pivot element 5 can be placed; the pivot element 5 is located in the central region of the second elastic member 6, with part of the body of this pivot element 5 being within the thickness of this second elastic member 6;

[0051] In this bearing 1, the end stone element 4 rests on the upper surface of the second elastic member 6, and under the action of the stress-applying element 11b bearing the tip 13a of the end stone element 4, it exerts only an axial elastic force around the entire circumference of the flat upper surface of this second elastic member 6. This force is then exerted by the contact area 23 of the end stone element 4 on the support surface 22c forming said circumference, in a direction perpendicular to the upper shoulder surface 19 of the through-opening 8.

[0052] Also, a "substantially axial impulse" should be understood to mean a "strictly axial," "approximately axial," or "partially axial" impulse. Similarly, a "substantially radial impulse" should be understood to mean a "strictly radial," "approximately radial," or "partially radial" impulse.

[0053] In this specification, "substantially parallel" can be understood to mean "strictly parallel or approximately parallel."

[0054] Such a bearing 1 therefore contributes to ensuring axial and radial recentering / repositioning of the staff of the timepiece components in the rest position after the timepiece is subjected to a shock or acceleration. [Explanation of symbols]

[0055] 1 bearing 2 bearing housing 3 First Elastic Member 4 End Stone Elements 5 Pivot Elements 6 Second elastic member 8 Through-hole 9a First orifice 9b Second orifice 10 Compact Assembly 11a Tightening element 11b Stress application element 11c Connecting Elements 13a central part 13b Periphery 15 Cavity 16 Back 21a Connection part 21b Tightening part 21c Elastic Elements 23 Contact area

Claims

1. A timepiece bearing (1) comprising a bearing housing (2) having a through opening (8), The through opening (8) has a stressed compact assembly (10), the compact assembly (10) comprising: a first elastic member (3) mounted within a first orifice (9a) of said through opening (8); a second elastic member (6) disposed between the first elastic member (3) and the second orifice (9b) of the through opening (8); a pivot element (5) for rotating the staff of the timepiece component, the pivot element (5) being arranged in a central region of the second elastic member (6) and facing the second orifice (9b); an end stone element (4) arranged between the first and second elastic members (3, 6) and intended to receive the end portion of the staff of the component, Through said second orifice (9b) said stuff of said component can be inserted into said through opening (8), The end stone element (4) is composed of a central portion (13a) as a tip portion and a peripheral portion (13b) as a base portion, The tip (13a) has a cavity (15) in which a part of the pivot element (5) can be placed; The base (13b) has a contact area (23) adapted to rest against the entire periphery of the flat upper surface of the second elastic member (6), and the outer surface (14b) of the end stone element (4) is formed to be stepped with the tip (13a) and cooperate with the first elastic member (3) to form a stop area for the end stone element (4). A bearing (1) characterized in that

2. The end stone element (4) is mounted so as to be able to move axially within the through opening (8) relative to the axis of rotation (A3) of the through opening (8). Bearing (1) according to claim 1 .

3. The central portion (13a) of the endstone element (4) is configured to enter the first orifice (9a) of the through-opening (8) upon receiving an impact that the timepiece may be subjected to. Bearing (1) according to claim 1 .

4. The peripheral portion (13b) of the endstone element (4) has a stop area adapted to interact with the first elastic member (3) in the event of an impact to which the timepiece may be subjected. Bearing (1) according to claim 1 .

5. the portion of the pivot element (5) located in the cavity (15) protrudes from the central region of the second elastic member (6); This part has an outer surface that is located near the back (16) of said cavity (15). Bearing (1) according to claim 1 .

6. The first elastic member (3) is configured to deform in a substantially axial direction relative to the rotation axis (A3) of the through opening (8). Bearing (1) according to claim 1 .

7. The first elastic member (3) has a clamping element (11a) for clamping and fixing the first elastic member (3) in the through opening (8), a stress-applying element (11b) intended to rest on the central part (13a) of the end stone element (4), and a connecting element (11c) connecting the stress-applying element (11b) and the clamping element (11a) to each other. Bearing (1) according to claim 1 .

8. The second elastic member (6) has a connecting portion (21a) for connecting the second elastic member (6) in the through-opening (8) and a fastening portion (21b) for fastening and fixing the pivot element (5) at a central region of the second elastic member (6); The connecting portion (21a) and the fastening portion (21b) are connected to each other by at least one elastic element (21c) of the second elastic member (6). Bearing (1) according to claim 1 .

9. The second elastic member (6) is fixedly mounted within the bearing housing (2). Bearing (1) according to claim 1 .

10. The second elastic member (6) is configured to deform in a substantially radial direction relative to the rotation axis (A3) of the through opening (8). Bearing (1) according to claim 1 .

11. The bearing housing (2), the through opening (8), the first and second elastic members (3, 6), the endstone element (5), and the pivot element have rotation axes (A2, A3, A4, A5, A6, A7) that coincide with the central axis (A1) of the bearing (1). Bearing (1) according to claim 1 .

12. Equipped with a bearing (1) according to claim 1 A timekeeping movement characterized by:

13. A timepiece movement comprising the timepiece movement according to claim 12. A timepiece characterized by:

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