Device for locking a movement of a clock piece

Abstract

The invention relates to a timepiece (100) comprising a case (1) having a case body (2) closed, at its upper part, by a bezel (3) and, at its lower part, by a case back (4), a watch movement (5) and a dial (6) mounted against the case body (2) by means of a mounting ring (7). According to the invention, the timepiece includes a shock-absorbing device (10) for the watch movement, said shock-absorbing device (10) comprising an upper annular piece (11) and a lower annular piece (12) arranged to be assembled on the assembly formed by the movement, the dial (6) and the mounting ring (7).

Description

Scope of the invention

[0001] The invention relates to a timepiece, such as a wristwatch, whose movement is held inside the case by a shock-absorbing device used to protect the movement in case of shocks. Background of the invention

[0002] Document FR 2 463 437 describes a timepiece whose movement is held by an annular shock-absorbing elastic support. This support has a radial projection defining a sealing sleeve interposed between the winding stem and the case. This sleeve appears to allow lateral movement of the stem relative to the case during an impact, but the stresses experienced by the stem and the winding and time-setting mechanism remain high. Such stresses can also occur, even without any impact, when the user applies lateral pressure to the crown.

[0003] We also know of documents WO2013054018A1, DE 837 075, EP 1 076 273, US 3 735 584, FR 2 211 690 and JP S53 10213, various anti-shock devices for a watch movement. Summary of the invention

[0004] The aim of the present invention is to overcome all or part of the aforementioned disadvantages by providing a timepiece comprising a shock-absorbing device for the movement and allowing for simplified assembly of the timepiece.

[0005] To this end, the invention relates to a timepiece comprising a case with a case closed at its upper end by a bezel and at its lower end by a case back, a watch movement, and a dial mounted against the case by means of a mounting ring. The timepiece includes a shock-absorbing device for the watch movement. The shock-absorbing device comprises an upper annular piece and a lower annular piece arranged to be assembled onto the assembly formed by the movement, the dial, and the mounting ring. According to the invention, the upper and lower annular pieces each have a conical surface arranged to cooperate with at least one shoulder of the case or one shoulder of the case back, respectively.

[0006] Advantageously, according to the invention, the assembly of the timepiece comprises a minimal number of parts and thus adapts more easily to manufacturing variations of the different components while maintaining advanced technicality with, in particular, a chronograph, a date display, a mechanical movement, a transparent back and a plastic case.

[0007] In accordance with other advantageous features of the invention: The upper and lower annular pieces are made of an elastomeric material such as natural or synthetic rubber; said upper annular piece includes positioning means for orienting the shock-absorbing device relative to the case; said upper and lower annular pieces include interlocking means arranged to cooperate with the dial and the casing ring; each upper and lower annular piece has a conical surface arranged to cooperate with a shoulder of the case; the watch component includes a ring arranged to be placed between the case back and the lower annular piece to hold the assembly together; each upper and lower annular piece includes a passage for a winding stem;The casing ring comprises a generally annular body formed by an upper and a lower part, the upper part being arranged to receive the dial and the lower part being arranged to receive the movement; the upper part has at least one notch as well as a discontinuous peripheral rim to orient and hold the dial in place on the casing ring, the dial having lugs arranged to rest against the edges of the notch; the watch movement is of the mechanical chronograph type. Brief description of the drawings

[0008] Other features and advantages will become clear from the description given below, which is indicative and in no way exhaustive, with reference to the attached drawings, in which: there figure 1 is an exploded view of the timepiece according to the invention; the figure 2is a perspective view of the case of the timepiece according to the invention; the figures 3a and 3b are perspective views of the shock-absorbing device of the timepiece according to the invention; the figures 4a is a perspective view of the shock-absorbing device assembled on a movement of the timepiece according to the invention; the figure 4b is a cross-sectional view along line AA of the figure 4a ; there figure 5 is a perspective view of the timepiece according to the invention. Detailed description of preferred embodiments

[0009] With reference to figures 1 to 3 , a timepiece according to the invention comprises a case 2 closed, in its upper part, by a bezel 3 and, in its lower part, by a case back 4, a watch movement 5 and a dial 6 mounted against the case 2 by means of a casing ring 7.

[0010] The internal space of the case 2 defines a housing 6 in which is housed a shock-absorbing device for the watch movement, the shock-absorbing device comprising an upper annular piece 11 and a lower annular piece 12 arranged to be assembled on the assembly formed by the movement, the dial and the casing ring.

[0011] The case 2 is made of metal or metal alloy; however, any other type of material is possible, such as plastic or ceramic. The bezel 3 and the case back 4 are also made of metal or metal alloy, and at least the bezel includes a crystal 30.

[0012] Movement 5 is preferably of the mechanical type, but a quartz movement could also be considered.

[0013] The case 2 is intended to receive the watch movement 5 by means of at least one shoulder 10 made in its inner wall, the movement 5 being mounted on the shoulder 10 of the case 2 by means of the shock-absorbing device, the shock-absorbing device enveloping the movement, the dial and the casing ring 7. In fact, the shock-absorbing device is intended to adapt the movement 5 against the inner wall of the case 2.

[0014] The casing ring 7 comprises a generally annular body formed by an upper part 70 and a lower part 71, the upper part being arranged to receive the dial and the lower part being arranged to receive the movement 5. As can be seen at the figure 1 , the upper part 70 has a larger diameter than the lower part 71 and thus forms a shoulder.

[0015] The upper part 70 has at least one notch 18 and a discontinuous peripheral rim 19' to orient and hold the dial 6 in place on the casing circle 7, the dial 6 also having lugs 60 resting against the edges of the notch 18. The lower part has a groove 19 arranged to cooperate with a movement plate 50 to orient and hold the latter in place.

[0016] According to the invention, the shock-absorbing device comprises an upper annular piece 11 and a lower annular piece 12, each having a conical surface 15, 20 arranged to cooperate with a shoulder of the case 10 or a shoulder of the base 4. The upper annular pieces 11 and lower annular pieces 12 are advantageously made of an elastomeric material such as natural or synthetic rubber in order to be able to absorb / dampen shocks.

[0017] As illustrated in the figure 3aThe upper annular piece 11 includes on its outer lateral face means for orientation relative to the case 2. The orientation means are in the form of tabs 13 forming a convex relief on the surface of the periphery of the upper annular piece 11, the tabs 13 being arranged to cooperate with recesses 13' of complementary shape formed on the inner wall of the case 2. It is therefore understood that the upper annular piece 11 is mounted against the case 2 and the conical surface 15 rests on the shoulder 10 of the case 2.

[0018] The upper annular piece 11 also includes means for orientation with respect to the ring of the socket 7, and implicitly with respect to the movement 5, the orientation means being in the form of at least one protruding element 14, formed on the inner lateral face of the annular piece 11, and arranged to cooperate with a cutout 17 of complementary shape at the level of the upper part of the ring of the socket 7.

[0019] As can be seen in the figure 3bThe lower annular piece 12 includes at least one machined feature 22 on its outer lateral face, which is arranged to cooperate by interlocking with at least one projecting element 14 of the upper annular piece 11. The lower annular piece 12 also includes an upper edge 21 arranged to rest against the upper part of the interlocking ring 7. It is therefore understood that the interlocking ring 7 and the dial 5 are clamped between the upper annular piece 11 and the lower annular piece 12 when the whole is assembled as shown in the diagram. figures 4a and 4b .

[0020] Advantageously, the upper annular piece 11 and the lower annular piece 12 each include a passage for a winding stem 51 so that the latter can be inserted during assembly. Naturally, other passages can be provided for the passage of a pusher stem, for example.

[0021] The watch part includes a ring 8 arranged to be placed between the base 4 and the lower annular piece 12 to hold the shock-absorbing device once the watch base is assembled onto the case.

[0022] Thus, when the timepiece is subjected to a shock, the assembly formed by the lower and upper annular parts, the movement and the dial, moves.

Claims

1. Timepiece (100) comprising a case (1) comprising a middle (2) closed, in the upper part thereof, by a bezel (3) and, in the lower part thereof, by a back (4), a horological movement (5) and a dial (6) fitted against the middle (2) using a casing circle (7), said timepiece (100) comprising a shock-absorbing device (10) for the horological movement, said shock-absorbing device (10) comprising an upper annular part (11) and a lower annular part (12) arranged to be assembled on the assembly formed by the movement, the dial (6) and the casing circle (7), characterised in that the upper (11) and lower (12) annular parts each have a conical surface (15, 20) arranged to cooperate with at least one shoulder (10) of the middle (2) or one shoulder of the back (4), respectively.

2. Timepiece according to claim 1, characterised in that the upper (11) and lower (12) annular parts are made of an elastomeric material such as natural or synthetic rubber.

3. Timepiece (100) according to claim 1 or 2, characterised in that said upper annular part (11) comprises positioning means for the orientation of the shock-absorbing device with respect to the middle (2).

4. Timepiece (100) according to one of claims 1 to 3, characterised in that said upper annular part (11) and the lower annular part (12) comprise casing means arranged to cooperate with the dial (6) and the casing circle (7).

5. Timepiece (100) according to one of claims 1 to 4, characterised in that it comprises a ring (8) arranged to be placed between the back (4) and the lower annular part (12) to hold the whole once the watch is assembled.

6. Timepiece (100) according to one of claims 1 to 5, characterised in that the upper annular part (11) and the lower annular part (12) each comprise a passage (16, 23) for a winding-mechanism rod (51).

7. Timepiece (100) according to one of the preceding claims, characterised in that the casing circle (7) includes a globally annular body formed by an upper part (70) and a lower part (71), the upper part (70) being arranged to receive the dial (6) and the lower part (71) being arranged to receive the movement (5).

8. Timepiece (100) according to claim 7, characterised in that the upper part (70) has at least one hollow (18) as well as a discontinuous peripheral rim (19') to orient and hold the dial (6) in place on the casing circle (7), the dial (6) having catches (60) resting against the edges of the hollow (18).

9. Timepiece (100) according to one of the preceding claims, characterised in that the horological movement (5) is of the mechanical chronograph type.

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