Timepiece provided with a device for attaching a plate to a middle

Abstract

The invention relates to a timepiece (10) comprising in particular a middle (12), a plate (16) of a timepiece movement and an attachment device for attaching the plate (16) to the middle (12). The attachment device comprises at least three retaining elements (14) mounted on or forming an integral part of the middle (12) and at least three holding elements (20a, 20b) mounted on or forming an integral part of the plate (16) in order to cooperate with the respective retaining elements (14) of the middle (12). At least one of the holding elements (20a, 20b) is an element that is movable relative to the plate (16) in order to abut a retaining element (14). The attachment device further comprises at least one locking element (30) that is associated with the at least one movable element (20a) and configured to lock the movable element (20a) against the retaining element (14) so that the plate (16) is locked to the middle (12).

Description

A watch component equipped with a device for attaching a plate to a case. technical field

[0001] The present invention relates to the field of watchmaking and more particularly to a watch part comprising a fastening device allowing easy assembly and disassembly between the plate and the case of the watch box. State of the art

[0002] Watch components typically include a mainplate to which most of the movement's components are attached. Conventionally, the mainplate is secured to the case with screws to ensure a stable and robust assembly. While screw fastening allows for disassembly for servicing, this process is time-consuming and requires care. Each service generally involves removing the screws that secure the mainplate, which demands expert handling.

[0003] Furthermore, when the watch case is made of a hard material, such as sapphire, ceramic, or specific alloys, the use of screws adds another layer of complexity, particularly in creating the threads for the screws that attach the mainplate to the case. Tapping in hard materials requires specialized tools and more time to ensure the threads are cut correctly without risking breakage of the tool or damage to the case.

[0004] CN212322066 discloses a sapphire watch case comprising a crystal, a case middle, and a case back that acts as a mainplate. The crystal, case middle, and case back are made of sapphire and are fastened together by numerous fasteners distributed around the perimeter of the watch case. Each fastener consists of a stem and a screw. The stem has a smooth outer surface, a threaded end, and a head on the other end. The stem of each fastener passes through the crystal, AUDEMA-37-PCT: The case and back of the watch are then screwed into the end of the stem to secure the assembly. This prevents the screw of each fastener from directly contacting the case during assembly, thus avoiding the risk of cracking the sapphire crystal.

[0005] The number of fasteners required to ensure a robust connection between the crystal, case, and back of the watch case makes assembling and disassembling the watch case time-consuming and tedious.

[0006] It is also common practice to use adhesive to attach the mainplate to the case, particularly when assembly using threads and screws is difficult, whether due to lack of space or the properties of the material. One drawback of such an attachment is that it does not allow for easy disassembly of the watch case, and the adhesive is generally not very strong under shear stress. It is necessary to apply force to the attachment, without any real control over the force applied, until it breaks, and then clean the initially glued areas to remove any remaining adhesive before re-gluing the mainplate when reassembling the movement in the case.

[0007] It is also known to create, by gluing, an assembly of a threaded ductile tube to a hard case. The threads in this tube typically allow for the insertion of a screw to secure the mainplate to the case. Regardless of the method used, the presence of glued parts generates, through outgassing, volatile organic compounds (VOCs) which, in general, have harmful effects and can be corrosive to certain watch components and negatively impact lubricants. Therefore, any glued element should be avoided in a watch case.

[0008] Thus, the known solutions for fixing a plate to a case, particularly when the latter is made of a hard or difficult-to-machine material, involve either complex screw assemblies or gluing techniques that are not very compatible with maintenance operations that require disassembling the plate from the case. AUDEMA-37-PCT

[0009] To remedy these drawbacks, it is known, notably by EP2595007B1, to fix a plate in a case by means of screws and an intermediate flange, the latter being tightened between the plate and the case in order to hold these elements against each other, this fixing relying mainly on a clamping and friction effect.

[0010] However, this type of fastening has the drawback of not being able to guarantee reliable long-term retention, particularly without the risk of the screws loosening unexpectedly. Furthermore, this fastening method does not allow for the temporary and play-free assembly of the plate to the case.

[0011] CH333999A discloses a movement fixing method within the case, achieved by rotating a trunnion carrying an eccentric, which engages in a groove in the case to lock the movement. This locking method has the disadvantage of presenting a risk of loosening, since the hold relies on an angular position of the trunnion, which can change over time, particularly when the timepiece is subjected to repeated mechanical stresses, such as vibrations.

[0012] JP349130265A, for its part, discloses a method of fixing a movement plate within a watch case made of a hard material, such as glass or ceramic. The hold is ensured by an elastic annular element interposed between the plate and the case, which exerts radial pressure holding the plate against the case without any mechanical engagement within the case. Brief summary of the invention

[0013] One aim of the present invention is therefore to provide a timepiece free from the aforementioned limitations.

[0014] One aim of the present invention is more particularly to provide a watch part comprising a fastening device allowing easy assembly and disassembly between the plate and the case of the watch box. AUDEMA-37-PCT

[0015] Another objective of the present invention is to provide a timepiece whose aforementioned fastening system is suitable for a watch case made of a hard material, in particular sapphire, ceramic, an amorphous alloy such as metallic glass (BMG) or an intermetallic material.

[0016] According to the invention, these objectives are achieved, at least in part, by means of a timepiece comprising, in particular, a case, a movement plate, and a fastening device for attaching the plate to the case. The fastening device comprises at least three retaining elements mounted on or forming part of the case and at least three supporting elements mounted on or forming part of the plate to cooperate with the respective retaining elements of the case. At least one of said supporting elements is movable relative to the plate so as to abut against a retaining element. The fastening device further comprises at least one safety or locking element associated with said at least one movable element and configured to lock the movable element against the retaining element so that the plate is locked to the case.

[0017] Advantageously, the moving element and the retaining element are configured to hold the plate against the case without play, while the locking element is configured to lock this hold by acting on the moving element. The locking element is a separate component from the moving element.

[0018] The moving element and the retaining element are typically configured to hold, before locking, the plate against the case without any degree of freedom, preventing any relative movement between the plate and the case, while the locking element is configured to act on the moving element in order to prevent any loosening of the plate relative to the case.

[0019] According to one embodiment, the moving element is arranged to cooperate with the retaining element by sliding or by rotation about an axis of rotation perpendicular to the general plane of the plate. AUDEMA-37-PCT

[0020] In one embodiment, the timepiece further comprises at least one stem, preferably at least two stems, fixed to the mainplate, an adjustable element movable along the stem or each stem and connected to the moving element or one of the two moving elements so that it can move to cooperate with a retaining element. The locking element or each locking element interacts with the respective stem or stems and is configured to lock the adjustable element in an axial locking position in which the moving element or one of the moving elements abuts against the corresponding retaining element.

[0021] In one embodiment, the rod or each rod has a threaded portion. The adjustable element is in the form of a threaded element mounted on the threaded portion.

[0022] According to one embodiment, the locking means is in the form of a compression spring, a lock nut, a locking screw or a stop ring in order to hold the adjustable part in the axial locking position.

[0023] In one embodiment, the adjustable part of the rod or each rod is connected to the moving element or one of the moving elements by a connecting piece. This is configured so that the moving element can move along an axis parallel to the axis of the rod to cooperate with the respective retaining element of the case.

[0024] According to one embodiment, the two rods are fixed at two opposite sides of the plate.

[0025] According to one embodiment, the rod or each rod is supported by a frame comprising fixing means attached to the plate.

[0026] According to one embodiment, the moving element or each moving element is mounted in a passage of the plate so that the plate is held in the general plane of motion, at least in part, by the moving element or each moving element. AUDEMA-37-PCT

[0027] In one embodiment, at least one of the movable elements is mounted on the plate to pivot about an axis perpendicular to the general plane of the plate. The locking element is configured to prevent any pivoting of the movable element once it has come to rest against the corresponding retaining element.

[0028] According to one embodiment, the moving element or each moving element is elongated in shape, preferably cylindrical.

[0029] In one embodiment, the retaining elements are fitted or screwed into blind holes located on the case. The moving element or each moving element has at one end a housing receiving one end of the corresponding retaining element.

[0030] In one embodiment, the retaining elements intended to cooperate with the moving elements are in the form of blind holes forming an integral part of the frame. The moving elements are configured to partially fit into the respective blind holes.

[0031] According to one embodiment, the case is made at least partly of a non-ductile material, in particular a ceramic, an amorphous material, an intermetallic or a stone such as sapphire.

[0032] Another object of the invention relates to a timepiece comprising, in particular, a case, a movement plate, and a fastening device for attaching the plate to the case. The fastening device comprises at least three retaining elements mounted on or forming part of the case and at least three supporting elements mounted on or forming part of the plate to cooperate with the respective retaining elements of the case. At least one of said supporting elements is movable relative to the plate so as to abut against a retaining element. The fastening device further comprises at least one safety or locking element associated with said at least one movable element and configured to lock the movable element against the retaining element so that the plate is locked to the case. Advantageously, AUDEMA-37-PCT said mobile element is arranged to cooperate with the corresponding retaining element by sliding.

[0033] The forms of implementation described in the paragraphs

[0020] to

[0031] are applicable to the purpose of paragraph

[0032] , Brief description of the figures

[0034] Examples of implementation of the invention are given in the description illustrated by the attached schematic figures, in which: Figure 1 illustrates a top view of a timepiece comprising a case and a plate locked to the case, according to one embodiment; Figure 2 illustrates a view similar to Figure 1 where the plate and case are being assembled or disassembled; Figure 3 illustrates an enlarged top view of a mounting module for the plate where a retaining element is abutted against a retaining element mounted on the case of the timepiece according to the configuration of Figure 1; Figure 4 illustrates a view similar to Figure 3 where the retaining element is freed from the retaining element of the frame according to the configuration of Figure 2; Figure 5 illustrates an enlarged view of the rod of the fixing module of Figure 4 where the retaining element is connected, by a connecting piece, to the locking element mounted on the rod; Figure 6 illustrates a cross-sectional view of the retaining and holding elements of Figure 3 according to AA; Figure 7 illustrates a cross-sectional view of the rod and frame of the fixing module of Figure 4 according to BB, and AUDEMA-37-PCT Figure 8 is a sketch of a perspective view of a portion of an inner side of the frame including a hole in which a retaining element is mounted. Examples of embodiments of the invention

[0035] The following description refers to the figures above, in most of which the spring 30 is schematically represented in its undeformed, i.e., uncompressed state. This is why it appears superimposed on the adjustable element 28. However, those skilled in the art will readily understand that under actual operating conditions, this spring typically bears against the outer face (Fig. 7) or against a shoulder inside the adjustable element, as explained below.

[0036] According to a preferred embodiment and with reference in particular to Figures 1 to 4, the timepiece 10 comprises a case 12, a mainplate 16, and a fastening device for attaching the mainplate to the case 12. In the illustrated example, the fastening device includes two fastening modules attached to the mainplate 16. These fastening modules can, for example, be attached to two opposite sides of the mainplate 16, typically between 11 o'clock and 1 o'clock and between 5 and 7 o'clock, respectively. Depending on the geometry of the case and the mainplate, these fastening modules can be attached at other locations on the mainplate, for example, on two opposite sides perpendicular to the fastening modules, as shown in the illustrated example.

[0037] With particular reference to Figures 3 to 5, each fixing module comprises a rod 25 whose ends are fixed to a frame 36 as described below. The rod 25 includes an adjustable element 28 adapted to move along its length. This adjustable element is typically a threaded element, for example a nut 28, mounted on a threaded portion 26 of the rod 25, as can be seen in Figure 7. A safety or locking element 30 is mounted on the rod 25 to immobilize the adjustable element 28 in an axial locking position or to prevent any translation of the element along the rod 25 when the plate 16 is locked to the frame 12.Even though the tightening torque applied to the thread of an adjustable element, such as a nut 28 mounted on a threaded portion 26, allows the assembly of parts to be held in place, the locking element 30 provides a safety feature preventing any untimely dismantling of this assembly, in particular. AUDEMA-37-PCTs if it is subjected for example to even momentary vibrations, unlike what can happen with the fastening systems described in EP2595007B1 and CH333999A.

[0038] In the illustrated example, the locking element is in the form of a compression spring 30 arranged around a portion of the rod 25 so that one end of the spring 30 bears against a shoulder 27 of the rod while its other end bears against a side of the adjustable element 28. In the case where the adjustable element 28 is in the form of a nut or a threaded socket, this other end bears either against a side of the adjustable element 28, or penetrates part of the adjustable element to bear against a shoulder, typically annular in shape, located inside the adjustable element.

[0039] Depending on the variant, the locking element 30 may, for example, be in the form of a lock nut, a circlip, or any other means to prevent any translation of the adjustable element 28. The locking element 30 could also consist of a small screw configured to be screwed into a threaded hole in a sleeve (tapped or untapped). This threaded hole is preferably perpendicular to the axis of the rod 25 and is configured so that the end of the screw presses against the rod to prevent any movement of the sleeve. In this variant, the rod would preferably have no threaded portion.

[0040] According to Figures 1 and 2, and particularly as more clearly seen in Figure 5, the nut 28 of each fastening module is connected to a movable retaining element 20a by a rigid connecting piece 32 so that the movement of the nut 28 along the rod 25 causes an identical movement of the retaining element 20a along an axis parallel to the axis of the rod. For this purpose, and by way of example, the connecting piece 32 has a first and second hook-shaped end 32a and 32b. The first end 32a is, for example, clipped onto a counter piece 34 integral with the nut 28, while the second end is typically clipped onto the retaining element 20a at a groove 21.

[0041] The counter-piece 34 is attached to the nut 28 in various ways. The nut 28 may have a circular recess, formed on one side of the nut opposite the side cooperating with the locking element 30, in which is AUDEMA-37-PCT has a cylindrical portion of the counter-piece 34 driven in. In one variant, the circular nut housing and the cylindrical portion of the counter-piece can be tapped and threaded respectively for screw assembly. Alternatively, the connecting piece can be fixed directly onto the nut without the use of a counter-piece.

[0042] The connecting piece 32 offers the advantage of increased flexibility in positioning the mainplate 16 relative to the case 12, taking into account the latter's volume and dimensional constraints. The length and / or geometry of the connecting piece 32 can be adjusted according to the desired location of the mainplate relative to the case, thus allowing for a customized adaptation to the specific characteristics of the watch mechanism and assembly requirements.

[0043] With reference to Figures 3, 4, and 7, the frame 36 supporting the rod 25 of each mounting module comprises two counter-pieces 37 fixed to the frame at two opposite corners. Each counter-piece 37 can, for example, be fixed to the frame 36 by means of two bushings 38 passing through the frame and the counter-piece 37, into which four pins with heads 39 are driven at the two ends of each bushing. Alternatively, the two aforementioned bushings could be threaded tubes or sockets, and the four pins with heads could be screws. Each counter-piece 37 forms a recess with the adjacent portion of the frame 36 to receive the respective ends of the rod 25.

[0044] Optionally, the frame 36 of each mounting module may also include mounting arms 36a, 36b arranged on either side of the rod 28 and extending perpendicularly to its axis. These mounting arms can be fixed to the plate 16, for example by means of screws.

[0045] To fix the plate to the case according to the illustrated embodiment described above, the two fixed retaining elements 20b must first be positioned against their respective retaining elements 14, located on the inner side of the case. The plate must then be lowered until the two movable elements 20a are axially aligned with the retaining elements 14 arranged on the opposite inner side of the case. Finally, the adjustable element of each fixing module is manipulated by the user to move the two movable elements 20a in translation until this AUDEMA-37-PCT that they come to rest against their respective retaining element 14. At this moment, that is to say before any locking of the plate 16 against the case 12, these two components are held together without play. In order to prevent any risk of loosening of the plate 16 relative to the case 12, which may appear over time, particularly when the timepiece is subjected to repeated mechanical stresses, such as vibrations, the locking element 30 of each fixing module ensures at this moment the axial locking of the respective movable element 20a, thus ensuring a reliable and durable fixing of the plate 16 to the case 12, contrary to the previously cited prior art.Also, advantageously, it can be foreseen that the play-free holding of the plate 16 against the case 12 provides a light hold which is sufficient to carry out the temporary assembly of these two components, for example during an operation where it is known in advance that the plate will have to be separated at least once from the case before its final assembly.

[0046] For the removal of the plate, particularly during a revision of the timepiece, it is simply necessary to manipulate the adjustable element 28 of each fixing module in a direction opposite to the force exerted by the locking element 30, in the case where the latter is a compression spring, in order to release the two movable elements 20a from their respective retaining element.

[0047] According to another embodiment not shown, each fixing module can be designed without a connecting piece 32. The movable retaining element can then be directly connected to the adjustable element 28 along the extension of the stem's axis. In this case, the stem must be fixed to the plate while leaving one end free to allow the retaining element to move along this extension of the axis. This configuration simplifies the design but reduces the flexibility in positioning the plate 16 relative to the case.

[0048] According to Figure 6, the movable element 20a of each fixing module is mounted in a passage 17 of the patina 16 surrounding, at least partially, the movable element so that the plate 16 is held in the general plane of movement, at least in part, by the movable elements 20a. The movable element 20a is elongated, preferably cylindrical, and has at one end a hole 22 for receiving the end of a retaining element 14. AUDEMA-37-PCT

[0049] The retaining elements can, for example, be in the form of positioning pins 14 fitted into blind holes 13 located on an inner side of the frame 12. Each positioning pin 14 has a distal portion, preferably frustoconical in shape, to cooperate with the hole 22 of the moving element or of fixed retaining elements, which hole 22 may also have a conical opening to more easily receive the positioning pin. The dimensions of the positioning pins 14 are adjusted to the dimensions of the blind holes so that they are housed there without adhesive. This has the advantage of allowing easy replacement of a worn pin during maintenance.

[0050] According to other, unillustrated embodiments, the movable retaining elements of the plate are configured to fit directly, partially, into blind holes in the case, by translation, without the use of positioning pins. Thus, the end of each movable element is configured to abut not against a positioning pin but against the bottom of the blind hole.

[0051] According to the illustrated embodiment, the plate 16 is fixed to the frame 12 by means of four positioning pins 14, as shown in Figures 1 and 2. These pins are arranged in the frame 12 on either side of the plate 16 at each fixing module. This module comprises the movable element 20a and a retaining element 20b. This retaining element 20b is fixed and may, for example, be in the form of a hole configured to receive the end of a positioning pin 14. This hole 20b may be made on a side of the frame 36 of each fixing module or on an edge of the plate 16.

[0052] Other embodiments of the invention, briefly described below, may be envisaged without departing from the scope of the invention as defined by the attached claims.

[0053] According to one embodiment, the retaining elements 20a, which are movable in translation about an axis parallel to the axis of the rod 25 according to the above description relating to the illustrated embodiment, could be replaced by AUDEMA-37-PCT retaining elements attached to the plate and arranged to be able to be actuated in rotation around an axis perpendicular to the general plane of the plate.

[0054] According to one variant, the fastening device could also include at least one movable element arranged to move in translation according to the illustrated example and at least one movable element arranged to be actuated in rotation about an axis perpendicular to the general plane of the plate according to the above description.

[0055] In both of the aforementioned cases, the moving element or each moving element is, for example, in the form of a finger comprising, on the one hand, a distal portion designed to cooperate with the corresponding retaining element on the case and, on the other hand, a proximal portion with a hole through which passes an axis represented by a rod, a screw, or any other element acting as a pivot. Such a pivot could include a threaded portion to receive a tapped part, for example, a nut. The finger would first be brought against a corresponding surface of the retaining element on the case, and then held in this position by various means described below to securely hold the plate against the case without play.

[0056] When the finger's axis of rotation is in the form of a threaded rod, a nut is advantageously provided for screwing onto this rod. This nut is then moved axially until it bears against the proximal part of the finger, thus exerting a clamping force on this part against the plate. This clamping ensures the mechanical retention of the plate against the case. Alternatively, when the finger's axis of rotation is a screw, this screw is driven directly into the plate until it exerts a holding force on the proximal part of the finger. The resulting clamping force then ensures firm retention of the plate against the case by the action of the distal part of the finger against the corresponding surface of the case's retaining element.

[0057] According to these two examples, a torsion spring, acting as a locking element, can also be placed on the plate and cooperate with the finger to rotate it around its axis. This spring exerts an elastic force designed to hold the finger in a locked position, allowing AUDEMA-37-PCAinsi to secure the assembly and to prevent any risk of loosening or untimely movement of the plate relative to the case.

[0058] Thus, the finger would be arranged to pivot around its pivot point in order to engage its distal end with the corresponding retaining element, and then the nut would be screwed against the finger to lock it in place. According to this variant, the retaining element is preferably in the form of a groove machined into the case, one end of which is delimited by a wall against which the distal end of the finger would come to rest.

[0059] Although the device for attaching the mainplate to the case in the illustrated example comprises four retaining elements and four retaining elements, this device could have only three retaining elements and a corresponding number of retaining elements. For example, the two fixed retaining elements 20b of the attachment device in the illustrated embodiment could be replaced by a control stem, typically the winding stem, which is integral with the mainplate. Thus, when assembling the mainplate into the case, the movement is inserted into the case, and then the mainplate is held and attached to the case by means of the two movable retaining elements 20a and the control stem, the hole 15 (see Figure 1) in the case for the passage of the stem acting as a retaining element.

[0060] According to another variant, the fastening device may consist of only one movable element, depending on the arrangement of the fixed elements relative to the case. This movable element could, for example, be in the form of the finger, as described previously, positioned midway between the two movable elements 20a of the example illustrated in Figure 1. This finger would be arranged to pivot around its pivot point in order to engage its distal end with a retaining element that would be positioned substantially opposite the hole for the winding stem. According to this variant, the mainplate would thus be in contact with the case at three points forming a triangle between them.

[0061] The fixing device according to any of the aforementioned embodiments is suitable for fixing the plate to a case made of a fragile or difficult-to-machine material such as ceramic (e.g. zirconium oxide, alumina, silicon carbide), sapphire, amorphous alloys such as metallic glasses (BMG, English acronym for Bulk Metallic Glass) or intermetallic materials (e.g. titanium aluminide, nickel aluminide, gold-aluminum). AUDEMA-37-PCT Timepiece 10 12-inch frame Hole 13 Retaining elements 14 Passage 15 Platinum 16 Passage 17 Support elements 20a, 20b Throat 21 Hole 22 Stem 25 Filleted portion 26 Shoulder 27 Adjustable part 28 (e.g., nut) Locking element 30 (e.g., spring, lock nut) Connecting piece 32 First end 32a Second end 32b Counterpiece 34 Building 36 Mounting arms 36a, 36b Counterpart 37 38mm socket 39-headed pin AUDEMA-37-PCT

Claims

Demands 1. A timepiece (10) comprising, in particular, a case (12), a mainplate (16) of a timepiece movement, and a fastening device for attaching the mainplate (16) to the case (12), the fastening device comprising at least three retaining elements (14) mounted on or forming part of the case (12) and at least three supporting elements (20a, 20b) mounted on or forming part of the mainplate (16) to cooperate with the respective retaining elements (14) of the case (12), at least one of said supporting elements (20a, 20b) being movable relative to the mainplate (16) to abut against a retaining element (14), the fastening device further comprising at least one locking element (30) associated with said at least one movable element (20a) and configured to lock the movable element (20a) against the retaining element (14) so ​​that the plate (16) is locked to the case (12),characterized in that said at least one moving element (20a) and the retaining element (14) are configured to hold, without play, the plate (16) applied against the case (12), in that the locking element (30) is configured to lock this hold by acting on the moving element (20a), and in that said locking element (30) is a component distinct from the moving element (20a).

2. A timepiece (10) according to claim 1, wherein said movable element (20a) is arranged to cooperate with said retaining element (14) by sliding or by rotation about an axis of rotation perpendicular to the general plane of the plate.

3. A watch part (10) according to claim 1 or 2, further comprising at least one rod (25), preferably at least two rods, integral with the plate (16), an adjustable element (28) movable along the rod or each rod (25) and connected to the moving element (20a) or to one of two moving elements so that it can move to cooperate with a retaining element (14), the locking element or each locking element (30) being in interaction with the respective rod or rod (25) and being configured to lock the adjustable element (28) in an axial locking position in which the moving element (20a) or one of the moving elements (20a) is abutted against the corresponding retaining element (14). AUDEMA-37-PCT4. A watch part (10) according to the preceding claim, in which the stem or each stem (25) has a threaded portion (26), the adjustable element being in the form of a tapped element (28) mounted on said threaded portion.

5. Watch part (10) according to claim 3 or 4, wherein the locking means (30) is in the form of a compression spring (30), a lock nut, a locking screw or a stop ring in order to maintain the adjustable part (28) in the axial locking position.

6. A watch part (10) according to any one of claims 3 to 5, wherein the adjustable part (28) of the stem or of each stem (25) is connected to the moving element (20a) or to one of the moving elements by a connecting part (32) configured so that the moving element (20a) can move along an axis parallel to the axis of the stem (25) to cooperate with the respective retaining element (14) of the case.

7. Timepiece (10) according to any one of claims 3 to 6, in which the two rods (25) are fixed at two opposite sides of the plate (16).

8. A timepiece (10) according to any one of claims 3 to 7, in which the stem or each stem (25) is supported by a frame (36) comprising fastening means (36a, 36b) fixed to the plate (16).

9. Timepiece (10) according to any one of the preceding claims, wherein the moving element or each moving element (20a) is mounted in a passage (17) of the plate (16) so that the plate (16) is held in the general plane of the movement, at least in part, by the moving element or each moving element (20a).

10. A timepiece according to any one of the preceding claims, wherein at least one of the moving elements is mounted on the plate to pivot about an axis perpendicular to the general plane of the plate and wherein the locking element is configured to prevent any pivoting of the moving element once it has come to a stop against the corresponding retaining element. AUDEMA-37-PCT11. Timepiece (10) according to any one of the preceding claims, wherein the moving element or each moving element (20a) is elongated, preferably cylindrical.

12. A watch part (10) according to any one of the preceding claims, wherein the retaining elements are fitted or screwed into blind holes (13) located on the case (12) and wherein the moving element (20a) or each moving element (20a) has at one end a housing (22) receiving one end of the corresponding retaining element.

13. Watch parts (10) according to any one of claims 1 to 11, wherein the retaining elements intended to cooperate with the moving elements are in the form of blind holes forming an integral part of the case (12), the moving elements being configured to fit partly into the respective blind holes.

14. Timepiece (10) according to any one of the preceding claims, wherein the case (12) is made at least partly of a non-ductile material, in particular a ceramic, an amorphous material, an intermetallic or a stone such as sapphire. AUDEMA-37-PCT

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