Spring ring for watch case and method for manufacturing the spring ring

Abstract

Improve the spring ring for the watch case. [Solution] The present invention relates to a spring ring (4) for a watch case (1000), wherein the watch case (1000) is - Middle (2), - A bezel (1) arranged to rotate around an axis (Z), comprising a circular track (11) having a first diameter and a toothed portion (12) having a second diameter different from the first diameter. It is equipped with a spring ring (4) positioned to be fixed to the middle (2), and the spring ring (4) is - At least one first spring blade (41) positioned on the first diameter of the spring ring (4) and provided to generate a substantially constant torque in cooperation with the circular track (11) to rotate the bezel (1), - To produce a clicking sound when the bezel (4) rotates, at least one second spring blade (42) is provided, positioned on the second diameter of the spring ring (4) and configured to work in conjunction with the toothed portion (12) and It is equipped with.

Description

Technical Field

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[0001] The present invention relates to a spring ring for a watch case and a method for manufacturing the spring ring.

Background Art

[0002] Many watches are provided with a rotating bezel, that is, a bezel that rotates about an axis (line). Generally, this axis is arranged perpendicular to the glass or dial of the watch movement. Usually, this axis passes through the center of the glass or dial. The rotating bezel may be engraved with graduations that can be adjusted to any angular position by the user. The (rotating) bezel can be used in watches for various purposes. For example, it is used to quickly determine the time of a second time zone, display the duration of diving, etc. on a display.

[0003] Including what the applicant provides, a watch case generally includes the following: - A middle (middle case, middle part of the case), and - A bezel arranged to rotate about an axis and having a plurality of teeth, and - A spring ring arranged to be fixed to the middle, having four spring plates arranged on a first diameter of the spring ring, and arranged to cooperate with those teeth to produce a clicking sound when the bezel rotates. And

[0004] In these watch cases, a spring (torsion spring or polygonal spring with a circular cross-section, such as a pan spring) that interlocks with both the bezel and the case is used to hold the bezel axially, that is, the bezel is held along a direction perpendicular to the main plane of the bezel.

[0005] This solution has several disadvantages. When interacting with the teeth of the bezel, it is difficult to synchronize the four spring plates, and the noise increases when the bezel rotates. In addition, since the torque of the bezel is not constant, play and noise become prominent. In particular, the torque varies from zero to a peak exceeding 1 Ncm, resulting in play and noise being felt by the user.

[0006] Finally, in this solution, the bezel must have a certain width because it is linked to the axial retaining spring. This prevents maximizing the diameter of the dial.

[0007] Patent Document 1 (US9395694) relates to a watch equipped with a rotating bezel and a spring ring. The spring ring comprises two first spring blades positioned to push the rotating bezel toward the front of the watch, and two second spring blades that engage and disengage click sections as the rotating bezel rotates, allowing the rotating bezel to rotate in only one direction.

[0008] Patent Document 2 (EP2672332) relates to a rotating bezel system. This system comprises a spring ring having at least one maximum radius range and at least one minimum radius range. The spring ring has a projection at one end and teeth on its outer surface. When the spring ring is attached, the projection is designed to face the toothed ring. The spring ring allows the bezel to rotate (in one direction) relative to the case and also serves to hold the bezel in place of the case. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] U.S. Patent No. 9395694 [Patent Document 2] European Patent Application Publication No. 2672332 [Overview of the project] [Problems that the invention aims to solve]

[0010] The object of the present invention is to provide a spring ring for a watch case that overcomes the limitations of known spring rings for watch cases.

[0011] Another object of the present invention is to provide a watch case in which the bezel emits a more controlled and distinct sound, such as a reduced sound, when rotated, compared to known solutions.

[0012] Another object of the present invention is to provide a watch case in which the bezel torque exhibits less variation than known solutions.

[0013] Another object of the present invention is to provide a watch case that offers better control and a more clearly defined bezel torque compared to known solutions. For example, a defined minimum torque, rather than zero, is guaranteed during bezel rotation.

[0014] Another object of the present invention is to provide a watch case with a minimized number of components compared to known watch cases. [Means for solving the problem]

[0015] In the present invention, these objectives are achieved, in particular, by the watch case spring ring described in claim 1 and the method for manufacturing the spring ring described in claim 14.

[0016] The watch case is - Middle, - A bezel arranged to rotate around a certain axis, comprising a circular track of a first diameter and a toothed portion having a second diameter different from the first diameter. It is equipped with.

[0017] The spring ring of the present invention is positioned to be fixed to the middle of this watch case, and below, - To generate a substantially constant torque for rotating the bezel, at least one first spring blade is positioned on the first diameter of the spring ring and is provided to work in conjunction with the circular track, - To produce a clicking sound when the bezel rotates, at least one second spring blade is positioned on the second diameter of the spring ring and is provided to work in conjunction with the toothed portion. It is a spring ring equipped with a spring.

[0018] In this context, "a first spring blade arranged to produce a substantially constant torque on the bezel in cooperation with a circular orbit" This expression indicates that the first spring blade contributes to this substantially constant torque generation. In fact, the constant rotational torque of the bezel is not obtained only by the cooperation of the first spring blade and the circular track, but also by another reaction force, that is, the reaction force caused by the friction of the axial holding element on the rotating bezel. Specifically, this substantially constant rotational torque is created by the action of the first spring blade pushing the bezel upward and the reaction of the sealing part (i.e., the axial holding element) holding the bezel.

[0019] In one embodiment, the contribution of the cooperation between the first spring blade and the circular track to the substantially constant rotational torque is about 50%, that is, 50% ± 10%. In this embodiment, this ratio is due to the fact that the force exerted by the first spring blade on the bezel is equal to the reaction force exerted by the sealing part on the bezel (the bezel is in an equilibrium state), and the only difference regarding torque is due to the contact radius of the first spring blade with respect to the bezel and the contact radius of the sealing part with respect to the bezel.

[0020] In one embodiment, the contribution of the cooperation between the first spring blade and the circular track to the substantially constant rotational torque is (slightly) greater than 50%, for example, exceeding 55%, when the first spring blade presses the bezel at a diameter position higher than the support part of the bezel's sealing part. In fact, torque is equal to the force multiplied by the lever arm (i.e., the radius), and when the forces are equal, only the radius affects the contribution to the torque.

[0021] In this context, "substantially constant bezel rotational torque" This expression is meant to imply that a variation of about 10% with respect to the average value of the rotational torque (for example, the variation caused by the toothed part of the bezel) is allowed.

[0022] The spring ring of the present invention performs multiple functions. Specifically, it generates a clicking sound when the bezel is rotated, while also contributing to the generation of a constant torque. These functions are achieved through the interaction between the first spring blade and the circular track of the bezel, and the interaction between the second spring blade and the toothed portion of the bezel, respectively.

[0023] The spring ring of this invention, which performs multiple functions, minimizes the number of parts in the watch case compared to known watch cases.

[0024] With the spring ring of the present invention, the rotational torque of the bezel is better controlled and more precisely defined compared to known solutions. In one embodiment, the rotational torque is in the range of 3 N·cm to 7 N·cm. With the spring ring of the present invention, it is possible to define, for example, a minimum rotational torque.

[0025] The spring ring of the present invention allows the bezel's torque and noise to be independently adjusted as needed.

[0026] The spring ring of the present invention causes the bezel to generate controlled noise during rotation, and the noise is kept within a predetermined noise level (for example, a lower noise level compared to noise reduced by certain known solutions).

[0027] In one embodiment, the first spring blade and the second spring blade are positioned to form an angle with respect to the main plane of the spring ring, and to press the bezel toward the upper surface of the watch case.

[0028] In one embodiment, the spring ring comprises a plurality of first spring blades (e.g., three first spring blades) and one second spring blade.

[0029] In one embodiment, each spring blade is positioned such that the angle separating two adjacent spring blades is always the same.

[0030] In one embodiment, the spring ring includes an orientation element that determines the orientation of the spring ring relative to the middle.

[0031] In one embodiment, the spring ring includes an element for fixing the spring ring to the middle for each of the first or second spring blades.

[0032] In one embodiment, both or one of the first spring blade and the second spring blade have a portion that contacts the toothed portion and an end portion that includes the free end of at least both or one of the first spring blade and the second spring blade. The contact portion is different from the end portion.

[0033] In one embodiment, the spring ring is integrally molded.

[0034] In one embodiment, the torque is in the range of 3 N·cm to 7 N·cm.

[0035] The present invention also relates to a watch case, which is the following: - Middle, - A bezel arranged to rotate about a certain axis, comprising a circular track of a first diameter and a toothed section having a second diameter different from the first diameter, - The spring ring of the present invention and It is equipped with.

[0036] In one embodiment, the teeth of the bezel are arranged such that the bezel can rotate in only one direction with respect to the axis of rotation.

[0037] In one embodiment, the teeth of the bezel are arranged such that the bezel can rotate in two opposite directions with respect to the axis of rotation.

[0038] The present invention also relates to a watch equipped with a spring ring or a watch case according to the present invention.

[0039] The present invention also relates to a method for manufacturing a spring ring according to the present invention, and the following: - A step of cutting the first spring blade and the second spring blade from the spring ring body, - A step of bending the first spring blade and the second spring blade, wherein the first spring blade and the second spring blade are bent to an angle with respect to the main plane of the spring ring, and It is equipped with.

[0040] Multiple examples of multiple embodiments of the present invention are shown in the following description and illustrated by the accompanying drawings. The drawings are as follows. [Brief explanation of the drawing]

[0041] [Figure 1] Figure 1 shows a perspective view of a watch case according to one embodiment of the present invention. [Figure 2] Figure 2 is a perspective view showing a portion of the watch case from Figure 1, along the AA cross-section. [Figure 3] Figure 3 is a side view showing a portion of the watch case from Figure 2, along the BB cross-section. [Figure 4] Figure 4 is a side view (without bezel) of the watch case shown in Figure 1, along the AA cross-section. [Figure 5] Figure 5 is a perspective view of a portion of the watch case shown in Figure 4, along the AA cross-section. [Figure 6] Figure 6 shows a side view of a portion of the watch case (particularly the bezel) from Figure 1, along the AA cross-section. [Figure 7] Figure 7 shows a bottom perspective view of the bezel portion along the AA cross-section in Figure 6. [Figure 8] Figure 8 shows a top perspective view along the AA cross-section of the bezel portion opposite to the bezel portion shown in Figure 7. [Figure 9] Figure 9 shows a perspective view of the axially retaining annular element of the watch case shown in Figure 1. [Figure 10] Figure 10 shows a plan view of the axially retaining annular element shown in Figure 9. [Figure 11] Figure 11 shows a cross-sectional view of the CC of the axially retained annular element in Figure 10. [Figure 12A]Figures 12A (to 12E) show the steps of a method for connecting a watch case middle to a watch case bezel according to one embodiment of the present invention. [Figure 12B] Figure 12B shows the steps of a method for connecting a watch case middle to a watch case bezel according to one embodiment of the present invention. [Figure 12C] Figure 12C shows the steps of a method for connecting a watch case middle to a watch case bezel according to one embodiment of the present invention. [Figure 12D] Figure 12D shows the steps of a method for connecting a watch case middle to a watch case bezel according to one embodiment of the present invention. [Figure 12E] Figure 12E shows the steps of a method for connecting a watch case middle to a watch case bezel according to one embodiment of the present invention. [Figure 13A] Figures 13A (to 13E) illustrate the steps of a method for connecting a watch case middle to a watch case bezel according to another embodiment of the present invention. [Figure 13B] Figure 13B shows the steps of a method for connecting the watch case middle to the watch case bezel according to another embodiment of the present invention. [Figure 13C] Figure 13C shows the steps of a method for connecting the watch case middle to the watch case bezel according to another embodiment of the present invention. [Figure 13D] Figure 13D shows the steps of a method for connecting the watch case middle to the watch case bezel according to another embodiment of the present invention. [Figure 13E] Figure 13E shows the steps of a method for connecting the watch case middle to the watch case bezel according to another embodiment of the present invention. [Figure 14] Figure 14 shows a perspective view of a spring ring for a watch case in one embodiment of the present invention. [Figure 15] Figure 15 shows a plan view of the spring ring shown in Figure 14. [Figure 16] Figure 16 shows the left side view of the spring ring shown in Figure 15. [Figure 17]Figure 17 shows a bottom view of the spring ring in Figure 15. [Figure 18] Figure 18 shows a DD cross-sectional view of the spring ring in Figure 15. [Figure 19] Figure 19 shows the right side view of the spring ring shown in Figure 15. [Modes for carrying out the invention]

[0042] Figure 1 shows a perspective view of a watch case 1000 according to one embodiment of the present invention. It comprises a middle 2 and a bezel 1, the bezel 1 being arranged to rotate about an axis, in particular the z-axis. The z-axis is perpendicular to the main plane XY of the bezel 1. In one embodiment, the z-axis is perpendicular to the glass or dial of a watch movement (not shown) and passes through its center. In one embodiment, one or more indicator members of the watch (not shown) are arranged to rotate about the z-axis or another axis (line). In one embodiment, the bezel 1 is arranged to rotate in only one direction. In another embodiment, it is arranged to rotate in both directions. Generally, the glass (not shown) is attached directly to the middle 2 (the middle part of the case) and is not integrated with the bezel 1. In another embodiment, the glass is assembled to the bezel 1 and rotates together with the bezel.

[0043] The bezel 1 in Figure 1 is polygonal, particularly dodecagonal. However, the present invention is not limited to such shapes and includes all other shapes, such as circles and ellipses.

[0044] The bezel 1 in Figure 1 has multiple edges with grooves 13 to improve the user's grip on the bezel. However, the present invention is not limited to the presence, number, shape, or arrangement of such grooves as shown in Figure 1.

[0045] Middle 2 typically houses the watch movement (not shown), and on the movement bar side, it is typically closed by a case back (not shown) that faces the glass (not shown).

[0046] Middle 2 may be made of metal, precious metal, ceramic, or other materials, for example, but is not limited to these. Bezel 1 may be made of the same material as the case or a different material. Bezel 1 may have a portion with markings or engravings 14, particularly in the upper area.

[0047] In one embodiment, the middle 2 includes a crown (not shown) that, conventionally, allows for both or either winding the watch and / or moving the indicator member. This crown may be housed in a crown housing 21. In an embodiment not shown, the middle 2 also includes one or more actuating members, such as buttons or push buttons, that perform functions (this is an example and not limited to) such as those of a chronograph watch.

[0048] In one embodiment, the middle 2 is typically equipped with a horn 22 (whether detachable or not), which allows the middle to be connected to a band connector (not shown).

[0049] Figure 2 is a perspective view of a portion of the watch case 1000 shown in Figure 1, along cross-section AA. Figure 3 shows another cross-section of a portion of the watch case 1000 shown in Figure 2.

[0050] In one embodiment, the bezel 2 comprises, for example, a circular track 11 and a toothed section 12 (or toothed track) having a first diameter, as shown in Figure 2. The toothed section 12 is also shown in Figure 2 and is positioned on a circle having a second diameter different from the first diameter. In one embodiment, the circular track 11 is adjacent to the toothed section 12. The circular track 11 is smooth, i.e., toothless.

[0051] In one embodiment, as illustrated in Figure 2, the diameter of the toothed portion 12 is smaller than the diameter of the circular track 11. In another embodiment (not shown), the diameter of the toothed portion 12 is larger than the diameter of the circular track 11.

[0052] The watch case 1000 also includes an axial retaining annular element 3 positioned to hold the bezel 1 in the middle 2.

[0053] Figure 9 shows a perspective view of the axially retaining annular element 3 in the watch case of Figure 1. Figure 10 shows a plan view of the axially holding annular element 3 in Figure 9. Figure 11 shows the CC cross-section of the axially retaining annular element 3 in Figure 10.

[0054] In one embodiment, the axially holding annular element 3 is an annular body whose cross-section in the XZ plane is formed from a single part. In one embodiment, this cross-section is polygonal. In another embodiment, this cross-section is concave and / or convex. In one embodiment, at least a portion of the peripheral edge of this cross-section is curved.

[0055] In one embodiment, this cross-section is quadrangular, particularly trapezoidal, and an example of this is shown, for example, in Figures 2, 3, and 11.

[0056] In one embodiment, the axially retaining annular element 3 is a monoblock, i.e., integrally molded.

[0057] In one embodiment, the axially retaining annular element 3 is made from a deformable material, particularly a bendable material. In one embodiment, it is made from a polymer, such as a thermoplastic elastomer. In one embodiment, it is made from Hytrel®.

[0058] In one embodiment, the axially holding annular element 3 is positioned to attenuate sound when the bezel 1 rotates.

[0059] In one embodiment, the axially retaining annular element 3 is positioned so that the bezel 1 can be detached from the middle 2 when an axial force exceeding a threshold is applied to both or either the bezel 1 and the middle 2. In one embodiment, this threshold is related to the resistance provided by the axially retaining annular element 3.

[0060] In one embodiment, the axially retaining annular element 3 is positioned to keep the rotational torque of the bezel 1 substantially constant by friction induced by the axially retaining annular element 3 when the bezel 1 rotates.

[0061] In this context, "The axially holding annular element 3 is positioned (arranged) to generate a substantially constant rotational torque on the bezel 1." This expression indicates that the axial holding annular element 3 contributes to the generation of this substantially constant rotational torque. In fact, the constant rotational torque of the bezel 1 is not obtained solely by the reaction force due to friction of the axial holding element 3 against the rotating bezel 1, but also by the cooperation of the first spring blade of the spring ring 4 and the circular track 11 of the bezel 1, which will be described later. Specifically, this substantially constant torque is generated by the action of the first spring blade pushing the bezel upward and the reaction force of the sealing part (i.e., the axial holding annular member) that holds the bezel in a predetermined position.

[0062] The rotational torque of bezel 1 is greater than that of known solutions. In one embodiment, the rotational torque is in the range of 3 N·cm to 7 N·cm.

[0063] Figures 12A to 12E illustrate the steps of a method for connecting the middle 2 to the bezel 1 by, for example, a press, according to one embodiment of the present invention.

[0064] In one embodiment, the middle 2 comprises a first housing 200 for receiving an axially retaining annular element 3. One embodiment of this housing 200 is shown, for example, in Figure 12A. In this embodiment, the housing 200 comprises a substantially mirror-symmetric P-shape, i.e., a P-shape obtained by axial symmetry around the z-axis, comprising a first U-shaped portion 201 and a second substantially rectangular portion 202 arranged along the x-axis. As will be discussed later, this embodiment is not limited to such a shape.

[0065] As shown in Figure 12B, the housing 200 is positioned to accommodate at least partially the axially retained annular element 3. In one embodiment of Figure 12B, a portion of the axially retained annular element 3 protrudes from the housing 200 of the middle 2. However, in this embodiment, the axially retained annular element 3 remains securely housed within the housing 200 and is integrated with the middle 2.

[0066] As can be seen in Figure 12B, the housing 200 includes a first contact surface 203 and a second contact surface 204 that are arranged to maintain permanent contact (i.e., permanent contact) with the axially retaining annular element 3.

[0067] In this context, the term "constantly" means When bezel 1 is not connected to middle 2 (Figure 12B), When connecting bezel 1 to middle 2, both or one of bezel 1 and middle 2 are moved axially to bring bezel 1 closer to middle 2 (Figures 12C and 12D), When bezel 1 is connected to middle 2 (Figure 12E), This means that the axially holding annular element 3 is in contact with both the first contact surface 203 and the second contact surface 204.

[0068] In one embodiment, the second contact surface 204 corresponds to the edge of the first housing 200.

[0069] In one embodiment, the housing 200 further includes a friction surface 205. When the bezel 1 is not connected to the middle 2, the axial retaining annular element 3 does not come into contact with this friction surface 205. When the bezel 1 is not connected to the middle 2, there is a distance d1 between the friction surface 205 and the axial retaining annular element 3, as shown, for example, in Figures 12B and 12C.

[0070] When bezel 1 is connected to middle 2, the axial retaining annular element 3 does not come into contact with the friction surface 205. When bezel 1 is connected to middle 2, there is a distance d2 between the friction surface 205 and the axial retaining annular element 3, as shown in Figure 12E.

[0071] In one embodiment, distance d1 is equal to distance d2. In another embodiment (not shown), both distances d1 and d2 are zero, provided that the contact between the axially retained annular element 3 and the friction surface 205 does not deform the axially retained annular element 3.

[0072] In one embodiment, the axially holding annular element 3 is in contact with the friction surface 205 only for a certain time range within a time interval during which both or one of the bezel 1 and the middle 2 are moved axially to bring the bezel 1 closer to the middle 2 in order to connect the bezel 1 to the middle 2, as illustrated in Figure 12D.

[0073] In one embodiment, the friction surface 205 is substantially parallel to the first contact surface 203.

[0074] In one embodiment, for example as shown in Figure 12C, the axially holding annular element 3 comprises a surface 303, a surface 305, a surface 301, and a surface 302. The surface 303 is substantially parallel to the first contact surface 203 of the housing 200, and at least a portion of the surface 303 is arranged to be in constant contact with the first contact surface 203. The surface 305 is substantially parallel to the friction surface 205 of the housing 200, and at least a portion of the surface 305 is positioned to contact the friction surface 205 to connect the bezel 1 to the middle 2 when both or one of the bezel 1 and the middle 2 move axially, bringing the bezel 1 closer to the middle 2. Surface 301 is substantially parallel to the first friction surface 101 of the bezel housing 100. Surface 302 is substantially parallel to surface 301, and a portion of surface 302 is positioned to continuously contact the second contact surface 204 of the case housing 200.

[0075] As described above, in order to connect bezel 1 to middle 2, both or one of bezel 1 and middle 2 are positioned to move axially so that bezel 1 moves closer to middle 2. In one embodiment shown in Figures 12A to 12E, bezel 1 is moved along the direction of arrow E in Figure 12D to connect bezel 1 to middle 2.

[0076] During this movement, in the embodiments shown in Figures 12A to 12E, the bezel 1 contacts the axially retaining annular element 3. The axial movement of the bezel 1 ends when the bezel 1 is connected to the middle 2 (Figure 12E). Specifically, the axially retaining annular element 3 (particularly a portion of its surface 301) first contacts the first friction surface 101 of the bezel 1 (this contact is not visible in Figures 12A to 12E). Next, the axially retaining annular element 3 contacts the second friction surface 102 of the bezel 1 (as shown in Figure 12D). This second friction surface 102, together with the first friction surface 101 of the bezel 1, forms the edge 104 of the bezel 1.

[0077] During this movement, the axially holding annular element 3 deforms. For example, it deforms in the direction of arrow F in Figure 12D, particularly by bending.

[0078] During this movement, only a portion of the surface 303 of the axially holding annular element 3 remains in contact with the first contact surface 203 of the housing 200, as shown in Figure 12D.

[0079] During this movement, the surface 305 of the axially holding annular element 3 slides on the friction surface 205, for example, in the direction of arrow G in Figure 12D.

[0080] In the embodiment shown in Figure 12C, the housing 100 of the bezel 1 is substantially trapezoidal, particularly rectangular trapezoidal. However, this shape is not limiting, and any other shape may be used, provided that the housing 100 includes a connecting surface 106 arranged to form the second friction surface 102 and the edge 107.

[0081] In fact, the axially retaining annular element 3 (particularly a portion of its surface 306) is in contact with this edge 107 of the housing 100 during axial movement of both or one of the bezel 1 and the middle 2. In the embodiments shown in Figures 12A to 12E, the axially retaining annular element 3 is also in contact with the edge 104 of the housing 100 during axial movement of both or one of the bezel 1 and the middle 2.

[0082] When the axial movement of both or one of the bezel 1 and middle 2 is completed, that is, when the bezel 1 is connected to the middle 2 as shown in Figure 12E, the housing 100 cooperates with the housing 200 to form a third housing 300 that receives the axially retaining annular element 3.

[0083] In the arrangement shown in Figure 12E, at least a portion of the surface 306 of the axially retained annular element 3 is in contact with the connecting surface 106 of the housing 100. In one embodiment, the surface 306 of the axially retained annular element 3 is substantially parallel to the connecting surface 106 of the housing 100.

[0084] In one embodiment, friction between the surface 306 of the axially retaining annular element 3 and the connecting surface 106 of the housing 100 contributes to generating a substantially constant rotational torque on the bezel 1.

[0085] In the arrangement shown in Figure 12E, the first contact surface 203 of the housing 200 is in good contact with (all) the surface 303 of the axially retained annular element 3. The second contact surface 204 of the housing 200 is in good contact with a portion of the surface 302 of the axially retained annular element 3. There is also a distance d2 between the surface 305 of the axially retained annular element 3 and the friction surface 205 of the housing 200.

[0086] Advantageously, the dimensions and shape of the axially retaining annular element 3 are the same inside the third housing 300 and outside the watch case after it has been housed in the third housing 300. In other words, the axially retaining annular element 3 has its nominal shape when housed inside the third housing 300 and when it is outside the watch case in a stress-free state after being housed inside the third housing 300.

[0087] In other words, once bezel 1 is connected to middle 2, the axial holding annular element 3 does not exert a compressive action.

[0088] In one embodiment, the dimensions and shape of the axially retaining annular element 3 are identical in the first housing (Figure 12B) and the third housing (Figure 12E). In other words, the axially retaining annular element 3 does not exert a compressive action after the bezel 1 is connected to the middle 2 (Figure 12E), and deforms only during the time period (Figure 12D) in which relative axial movement occurs between the bezel 1 and the middle 2 to achieve the connection between the bezel 1 and the middle 2. In other words, the axially retaining annular element 3 maintains its nominal shape within the first housing (Figure 12B) and the third housing 300 (Figure 12E).

[0089] In another embodiment (not shown), the dimensions or shape of the axially retaining annular element 3 differ between the first housing 100 and the third housing 300. For example, this applies when the axially retaining annular element 3 is plasticized when connected to the bezel 1 and the middle 2.

[0090] Figures 13A to 13E illustrate steps of a method for connecting the middle 2' to the bezel 1' according to another embodiment of the present invention, for example, by push. In this embodiment, the axial retaining annular element 3' is housed in the housing 100' of the bezel 1' before the bezel 1' is attached to the middle 2' (Figure 13B).

[0091] In this embodiment, the bezel 1' comprises a first housing 100' that receives an axially retaining annular element 3'. One embodiment of this housing 100' is shown, for example, in Figure 13A. In this embodiment, the housing 100' has a shape obtained with substantially "mirror image" P-shape, i.e., symmetry with respect to the X-axis. That is, the housing 100' comprises a first substantially rectangular portion 101' and a second U-shaped portion 102' positioned along the X-axis. As will be discussed later, this embodiment is not limited to this shape.

[0092] As shown in Figure 13B, the housing 100' is positioned to accommodate at least partially the axially retained annular element 3'. In one embodiment of Figure 13B, a portion of the axially retained annular element 3' protrudes from the housing 100' of the bezel 1'. However, in this embodiment, the axially retained annular element 3' remains securely housed within the housing 100' and is integrated with the bezel 1'.

[0093] As shown in Figure 13B, the housing 100' includes a first contact surface 103' and a second contact surface 104' that are arranged to maintain a state of permanent contact (i.e., permanent contact) with the axially retaining annular element 3'.

[0094] Similar to the embodiments shown in Figures 12A to 12E, the term "constantly" means When bezel 1' is not connected to middle 2' (Figure 13C), When both or one of bezel 1' and middle 2' are moved axially to bring bezel 1' closer to middle 2' and connect bezel 1' to middle 2' (Figures 13C and 13D), When bezel 1' is connected to middle 2' (Figure 13E) This means that the axially retaining annular element 3' is in contact with both the first contact surface 103' and the second contact surface 104'.

[0095] In one embodiment, the second contact surface 104' corresponds to the edge of the housing 100'.

[0096] In one embodiment, the housing 100' also includes a friction surface 105'. When the bezel 1' is not connected to the middle 2', the axial retaining annular element 3' is not in contact with this friction surface 105'. When the bezel 1' is not connected to the middle 2', there is a distance d'1 between this friction surface 105' and the axial retaining annular element 3', for example, as shown in Figure 13B.

[0097] When bezel 1' is connected to middle 2', the axial retaining annular element 3' is not in contact with this friction surface 105'. When bezel 1' is connected to middle 2', there is a distance d'2 between this friction surface 105' and the axial retaining annular element 3', for example, as shown in Figure 13E.

[0098] The considerations for d1 and d2 also apply to distances d'1 and d'2.

[0099] The axially retaining annular element 3' is in contact with this friction surface 105' only for a time period during which both or one of the bezel 1' and the middle 2' are moved axially to connect the bezel 1' to the middle 2', as illustrated in Figure 13D.

[0100] In one embodiment, this friction surface 105' is substantially parallel to the first contact surface 103'.

[0101] In one embodiment, for example as shown in Figure 13C, the axially holding annular element 3' comprises a surface 303', a surface 305', and a surface 302'. The surface 303' is substantially parallel to the first contact surface 103' of the housing 100', and is positioned such that at least a portion of the surface 303' is in constant contact with the first contact surface 103'. The surface 305' is substantially parallel to the friction surface 105' of the housing 100', and at least a portion of the surface 305' is positioned to contact the friction surface 105' in order to connect the bezel 1' to the middle 2' when both or one of the bezel 1' and the middle 2' move axially, bringing the bezel 1' closer to the middle 2'. Surface 302' is substantially parallel to surface 301' which is substantially parallel to the first friction surface 201' of the housing 200' of the middle 2', and a portion of this surface 302' is positioned to permanently contact this second contact surface 104' of the housing 100' of the bezel 1'.

[0102] As mentioned above, bezel 1' and middle 2' are positioned so that bezel 1' moves axially closer to middle 2'. This connects bezel 1' to middle 2'. In the embodiments shown in Figures 13A to 13E, it is middle 2' that moves along the direction of arrow E' in Figure 13D in order to connect bezel 1' and middle 2'.

[0103] During this movement, in one embodiment shown in Figures 13A to 13E, the middle 2' contacts the axially retained annular element 3'. The axial movement of the middle 2' ends when the bezel 1' is connected to the middle 2' (Figure 13E). In particular, the axially retained annular element 3' (especially a portion of its surface 301') first contacts the first friction surface 201' of the middle 2' (this contact is not visible in Figures 13A to 13E). Next, it contacts the second friction surface 202' of the middle 2' (as shown in Figure 13D). This second friction surface 202', together with the first friction surface 201' of the middle 2', forms the edge 204' of the middle 2'.

[0104] During this movement, the axially holding annular element 3' is deformed. In particular, it is deformed by bending in the direction of arrow F' in Figure 12D, for example.

[0105] During this movement, as shown in Figure 13D, only a portion of the surface 303' of the axially retaining annular element 3' maintains contact with the first contact surface 103' of the housing 100'.

[0106] During this movement, the surface 305' of the axially holding annular element 3' slides on the friction surface 105' in the direction of arrow G' in Figure 13D, for example.

[0107] In the embodiment shown in Figure 13C, the housing 200' of the middle 2 is substantially trapezoidal, particularly rectangular trapezoidal. However, this shape is not limiting, and other arbitrary shapes may be used, provided that the housing 200' has a connecting surface 206' arranged to form a second friction surface 202' and an edge 207'.

[0108] In fact, the axially retaining annular element 3' (particularly a portion of its surface 301') is in contact with this edge 207' of the housing 200' during axial movement of both or one of the bezel 1' and the middle 2'. In one embodiment shown in Figures 13A to 13E, the axially retaining annular element 3' (particularly a portion of its surface 301') is also in contact with the edge 204' of the housing 200' during axial movement of both or one of the bezel 1' and the middle 2'.

[0109] When the axial movement of both or one of the bezel 1' and middle 2' is completed, that is, when the bezel 1' is connected to the middle 2', the housing 200' cooperates with the housing 100' to form a third housing 300' that receives the axially retaining annular element 3', as shown in Figure 13E, for example.

[0110] In the arrangement shown in Figure 13E, at least a portion of the surface 306' of the axially retained annular element 3 is in contact with the connecting surface 206' of the housing 100. In one embodiment, the surface 306' of the axially retained annular element 3' is substantially parallel to the connecting surface 206' of the housing 200'.

[0111] In one embodiment, friction between the surface 306' of the axially retaining annular element 3' and the connecting surface 206' of the housing 200' contributes to generating a substantially constant rotational torque in the bezel 1'.

[0112] In the arrangement shown in Figure 13E, the first contact surface 103' of the housing 100' is in good contact with (all) of the surface 303' of the axially retained annular element 3'. The second contact surface 104' of the first housing 100' is in good contact with a portion of the surface 302' of the axially retained annular element 3'. Additionally, there is a distance d'2 between the surface 305' of the axially retained annular element 3' and the friction surface 105' of the housing 100'.

[0113] Advantageously, the dimensions and shape of the axial retaining annular element 3' are identical both inside the third housing 300' and outside the watch case after being housed in the third housing 300'. In the illustrated embodiment, the dimensions and shape of the axial retaining annular element 3' are the same in both the housing 100' (Figure 13B) and the third housing 300' (Figure 13E). In other words, after the bezel 1' is connected to the middle 2' (Figure 13E), the axial retaining annular element 3' does not exert compression, but deforms only for a period of time during which relative axial movement occurs between the bezel 1' and the middle 2' (Figure 13D), connecting the bezel 1' to the middle 2'. In other words, the axial retaining annular element 3' has its nominal shape inside the housing 100' (Figure 13B) and inside the housing 300' (Figure 13E).

[0114] In another embodiment (not shown), the dimensions or shape of the axially retaining annular element 3' differ between the first housing 100' and the third housing 300'. For example, this occurs when the axially retaining annular element 3' is plasticized without being compressed when connecting the bezel 1' and the middle 2'.

[0115] In several embodiments shown in Figures 12A to 12E and Figures 13A to 13E, inserting the bezel into the middle is easy, but removing the bezel is more difficult. However, the bezel can still be removed by applying sufficient force (for example, an equivalent force during impact, e.g., a force exceeding 5000g) without damaging the axial retaining annular member.

[0116] In the embodiments shown in Figures 12A to 12E, in order to remove the bezel 1 from the arrangement shown in Figure 12E, it is necessary to move the bezel 1 and the middle 2 in the axial direction to separate the bezel 1 from the middle 2. For example, the bezel 1 can be moved in the axial direction opposite to arrow E in Figure 12D.

[0117] During this movement, the axially retaining annular element 3, particularly its surface 306, slides over the bezel's connecting surface 106 and edge 107 (Figure 12E). Subsequently, the surface 301 of the axially retaining annular element 3 comes into contact with the second friction surface 102, the edge 104, and the first friction surface 102, returning to the configuration shown in Figure 12C.

[0118] During this movement, the first contact surface 203 (at least a portion thereof) and the second contact surface 204 (at least a portion thereof) are positioned to maintain constant contact with the axially retaining annular element 3. During this movement, the axially retaining annular element 3 is in contact with the friction surface 205. As illustrated in Figure 12C, it separates from the friction surface 205 when the bezel 1 is no longer connected to the middle 2.

[0119] The considerations regarding the removal of bezel 1 in the embodiments shown in Figures 12A to 12E also apply mutatis mutandis to the removal of bezel 1' in the embodiments shown in Figures 13A to 13E.

[0120] Figure 14 shows a perspective view of a spring ring 4 for a watch case 1000 according to one embodiment of the present invention. Figures 15 to 19 show the spring ring 4 from different viewpoints. In the embodiments of Figures 1 to 8, Figures 12A to 12E, and Figures 13A to 13E, the spring ring 4 is fixed to the middle 2 and configured to cooperate with the bezel 1. For simplicity, the embodiments of Figures 1 to 8 and Figures 12A to 12E will be referred to below.

[0121] The spring ring 4 is fixed to the middle 2 and configured to cooperate with the bezel 1, as shown in Figures 2 and 3, for example. The spring ring 4 includes, in particular, at least one first spring blade 41 positioned on the first diameter of the spring ring 4, for example, the outer diameter. In the embodiment of Figure 14, there are three first spring blades 41. Each of these first spring blades 41 includes a body 410, a fixed end 411, and a free end 412.

[0122] Each of these first spring blades 41 is positioned to work in cooperation with the circular track 11 of the bezel 1 (see Figure 3) to keep the rotational torque of the bezel substantially constant. As mentioned above, the constant rotational torque of the bezel 1 is not obtained solely by the cooperation of the first spring blades 41 and the circular track 11, but also by the effect of another reaction force, namely the reaction force due to the friction of the axial holding element 3 against the rotating bezel 1.

[0123] The spring ring 4 also includes at least one second spring blade 42 positioned on the second diameter of the spring ring, for example, the inner diameter. In the embodiment shown in Figure 14, there is only one second spring blade 42. However, there may be multiple second spring blades 42. Each of these second spring blades 42 comprises a body 420, a fixed end 421, and a free end 422.

[0124] Each of these second spring blades 42 is positioned to work in cooperation with the toothed portion 12 of the bezel 1 (see Figure 3) to produce a clicking sound when the bezel 1 rotates.

[0125] Therefore, the spring ring 4 performs multiple functions. That is, it generates a clicking sound when the bezel 1 rotates, and at the same time contributes to generating a constant torque. These functions will be explained separately, as they are performed by the interaction between the first spring blade 41 and the circular track 11 of the bezel 1, and by the interaction between the second spring blade 42 and the toothed portion 12 of the bezel 1.

[0126] Thanks to the effect of the spring ring 4, which performs multiple functions, the watch case of reference numeral 1000 has fewer parts than conventional watch cases.

[0127] Because of the spring ring 4, the torque of the bezel 1 can be adjusted as needed. Because of the spring ring 4, the torque value and rotational noise ("click sound") of the bezel 1 can be adjusted independently. There are two tracks on the bezel (toothed section 12 and smooth track 11), and the spring blade of the spring ring 4 has two diameters, so the torque and "click sound" can be adjusted independently. For example, if you want to increase only a constant torque value, you only need to increase the tension of the spring blade 41 that contacts the smooth track 11 of the bezel 1. If you want to change only the click sound, you only need to change the tension of the spring blade 42 that engages with the teeth of the toothed section 12, or change the toothed section 12 itself.

[0128] The spring ring 4 also allows for a greater rotational torque of the bezel 1 compared to known solutions. In one embodiment, the rotational torque is in the range of 3 N·cm to 7 N·cm. The rotational torque also depends on the number of the first spring rings 41. The larger this number, the greater the rotational torque of the bezel 1. In one embodiment, the larger the diameter of the bezel 1, the greater the rotational torque applied by the user.

[0129] Because of the spring ring 4, the bezel 1 generates a predetermined and controlled noise when rotating. This differs from known solutions. In one embodiment, the bezel 1 produces less noise when rotating than certain known solutions.

[0130] In one embodiment, the body 410 of the first spring blade 41 and the body 420 of the second spring blade 42 form an angle α (for example, the angle shown in Figure 14) with respect to the main plane of the spring ring 4 (which is substantially parallel to the main plane of the bezel 1). Preferably, but not necessarily, all of these angles are equal.

[0131] In one embodiment, the first spring blade 41 and the second spring blade 42 are arranged to push the bezel 1 toward the upper surface of the watch case 1000. In this context, the upper surface of the watch case 1000 is the surface on which the dial is located and is the surface opposite to the lower surface on which the case back of the watch case 1000 is located.

[0132] In one embodiment, the torque of bezel 1 also depends on the angle α. The larger this angle, the greater the torque of bezel 1.

[0133] In one embodiment, the torque of the bezel 1 also depends on the width w of each first spring blade 41 (see Figure 15). The larger this width, the greater the torque of the bezel 1.

[0134] In one embodiment, the rotational torque of the bezel 1 also depends on the length L of each first spring blade 41 (shown in Figure 15). Longer blades, combined with increased reinforcement, enhance the robustness of the structural system. That is, they allow the system to withstand even small geometric variations in the winding section without being significantly affected. In other words, the longer the blades and the stronger the winding, the smaller the geometric variations of the blades during winding, and the more robust the structural system becomes.

[0135] In one embodiment, the first spring blade 41 and the second spring blade 42 are arranged at equal intervals (in terms of angle). That is, they are arranged so that the angle between any two adjacent spring blades is always the same.

[0136] In one embodiment, the spring ring 4 includes an orientation element 45 (or angular positioning element) for the spring ring 4 relative to the middle 4. In the embodiment shown in Figure 45 (Figures 14 to 18), this orientation element is a hook, but other orientation elements well known to those skilled in the art may be used instead of the hook.

[0137] In one embodiment, the spring ring 4 includes fixing elements 43 for each first or second spring blade, which secure the spring ring 4 to the middle 2. These fixing elements 43 also prevent undesirable deformation of the spring ring 4.

[0138] In one embodiment shown in Figure 14, each fastening element 43 is a through hole, which works in conjunction with a screw (not shown). However, instead of the hole-and-screw assembly, other fastening elements known to those skilled in the art, such as a clip mechanism, may be used.

[0139] In one embodiment, the angular distance between the hole and the fixed end of the corresponding spring blade is less than 1°, for example, equal to 0.6°.

[0140] In one embodiment, attaching the spring ring 4 to the middle 2 affects the torque of the bezel 1. In one embodiment, this attachment is adjustable (for example, to make the screws tighten more or less). This allows for adjustment of the torque of the bezel 1.

[0141] In one embodiment, the spring ring 4 comprises elements (or multiple elements) that allow both attachment of the spring ring 4 to the middle 2 and orientation of the spring ring 4 relative to the middle 2.

[0142] The free end 412 of each first spring blade 41 may form a first angle. This angle may differ from the angle (α) formed by the body 410 of each first spring blade 41.

[0143] The free end 422 of each second spring blade 42 may form a second angle. This angle may differ from the angle (α) formed by the body 420 of each first spring blade 42. The second angle may differ from the first angle of the free end 412 of each first spring blade 41, as shown in Figure 14, for example.

[0144] In one embodiment, the first spring blade 41 and the second spring blade 42 each have a portion that contacts the track 11 and the toothed portion 12, and an end portion with free ends 412 and 422, respectively, wherein the contact portion is different from the end portion. This ensures that no contact occurs between the track 11 and the toothed portion 12 at the free ends 412 and 422 of each spring blade. This results in controllable contact where no contact occurs at the edges of the free ends 412 and 422. In another embodiment, the contact portion coincides with the end portion.

[0145] In one embodiment, the spring ring 4 is integrally molded.

[0146] In one embodiment, the spring ring 4 is made of a material having the property of a high elastic limit (e.g., maintaining 1500 MPa or more). It consists of a material that has at least one of the following properties: high rigidity (e.g., 180 GPa or more), abrasiveness, resistance to both or one of fatigue and / or corrosion, and is easily manufactured (e.g., by conventional methods such as cutting and bending).

[0147] In one embodiment, the spring ring 4 is made of spring steel, Durnico®, or Durimphy®.

[0148] In one embodiment, the spring ring 4 is made of a nonmagnetic austenitic material, such as Phynox (registered trademark). It is made from.

[0149] In one embodiment, the torque of the bezel 1 also depends on the material of each first spring blade 41.

[0150] In one embodiment, the teeth 11 of the bezel 1 are arranged such that the bezel 1 can rotate in only one direction with respect to the axis of rotation Z. In another embodiment, the teeth 11 of the bezel 1 are arranged such that the bezel 1 can rotate in two opposite directions with respect to the axis of rotation Z.

[0151] The spring ring 4 can be manufactured by the following method. - Cut out the first spring blade 41 and the second spring blade 42 to form the main body of the spring ring, - The first spring blade 41 and the second spring blade 42 are bent so that they form an angle α with respect to the main plane of the spring ring. These angles α may all have the same value, or they may all have different values.

[0152] Spring ring 4 can be used as a replacement for a known spring ring. And watch case 1000 is compatible with existing watch models. [Explanation of Symbols]

[0153] 1.1' bezel 11 Circular Tracks 12 Dentate 13 Groove 14. Scale or markings 2,2' Middle 21 Ryuzu Housing 22 horns 3,3' Axial-holding annular element 4 spring rings 41 First Blade 42. Second Blade 43 Fixed elements 45 Orientation elements 100,100' Glass-rimmed housing 101 First friction surface of housing 100 102 Second friction surface of housing 100 103' First contact surface of housing 100' 104' Second contact surface of housing 100' 104 Housing 100 Edge 105' Friction surface of housing 100' 106 Housing connection surface 100 107 Housing edge 100 200,200' Middle Housing 201 Housing 200 Part 1 201' First friction surface of housing 200 202 Housing 200 Part 2 202' Second friction surface of housing 200 203 First contact surface of housing 200 204 Second contact surface of housing 200 204' Housing 200' Edge 206' housing 200' connection surface 207' housing 200' edge 300,300' Third Housing Surface of 301,301' axially retained annular element 3 Surface of 302,302' axially held annular element 3 Surface of 303,303' axially retained annular element 3 Surface of 305,305' axially retained annular element 3 Surface of 306, 306' axially retained annular element 3 410 Main body of the first blade 41 411 Fixed end of the first blade 41 412 Free end of the first blade 41 420 Main body of the second blade 42 421 Fixed end of the second blade 42 422 Free end of the second blade 42 1000 watch cases AA cross section BB cross section CC cross section DD cross section d1, d2 distance d'1, d'2 distance E, E' arrow F, F' arrow G, G' arrow L Length w width XY plane Z axis α angle

Claims

1. A spring ring (4) for a watch case (1000), wherein the watch case (1000) is - Middle (2), - A bezel (1) arranged to rotate about an axis (Z), the bezel (1) having a circular track (11) having a first diameter and a toothed portion (12) having a second diameter different from the first diameter. The spring ring (4) is positioned to be fixed to the middle (2), and the spring ring (4) is - To generate a substantially constant torque for rotating the bezel (1), at least one first spring blade (41) is provided, positioned on the first diameter of the spring ring (4) and configured to cooperate with the circular track (11), - In order to produce a clicking sound when the bezel (4) rotates, at least one second spring blade (42) is provided, which is positioned on the second diameter of the spring ring (4) and is configured to work in conjunction with the toothed portion (12) and A spring ring (4) is provided.

2. The spring ring (4) according to claim 1, wherein the first spring blade (41) and the second spring blade (42) are arranged to form an angle (α) with respect to the main plane of the spring ring (4) and to push the bezel toward the upper surface of the watch case (1000).

3. The spring ring (4) according to claim 1 or 2, comprising a plurality of first spring blades (41), for example, three first spring blades (41) and a single second spring blade (42).

4. The spring ring (4) according to any one of claims 1 to 3, wherein each spring blade (41, 42) is arranged such that the angle separating two adjacent spring blades (41, 42) is always the same.

5. The spring ring (4) according to any one of claims 1 to 4, further comprising an orientation element (45) that orients the spring ring relative to the case.

6. The spring ring (4) according to any one of claims 1 to 5, wherein each of the first or second spring blades is provided with a fixing element (43) for fixing the spring ring (4) to the middle (2).

7. The spring ring (4) according to any one of claims 1 to 6, wherein both or one of the first spring blade (41) and the second spring blade (42) each have a contact portion that contacts the track (11), a contact portion that contacts the toothed portion (12), and an end portion having the free ends (412, 422) of both or one of the first spring blade (41) and the second spring blade (42), and the contact portion is different from the end portion.

8. A spring ring (4) according to any one of claims 1 to 7, which is integrally molded.

9. The spring ring (4) according to any one of claims 1 to 8, wherein the torque is in the range of 3 N·cm to 7 N·cm.

10. - Middle (2), - A bezel (1) arranged to rotate about an axis (Z), comprising a circular track (11) having a first diameter and a toothed portion (12) arranged in a circle having a second diameter different from the first diameter, A spring ring (4) according to any one of claims 1 to 9 and A watch case (1000) equipped with [a specific feature].

11. The watch case (1000) according to claim 10, wherein the bezel (1) is arranged such that the bezel (1) can rotate in only one direction relative to the axis of rotation.

12. The watch case (1000) according to claim 10, wherein the toothed portion (12) of the bezel (1) is arranged so that the bezel (1) can rotate in two directions opposite to the rotation axis (Z).

13. A watch comprising a spring ring (4) according to any one of claims 1 to 9 or a watch case according to any one of claims 10 to 12.

14. A method for manufacturing a spring ring (4) according to any one of claims 1 to 9, - A step of cutting out the first spring blade (41) and the second spring blade (42) from the spring ring (4) body, - The steps of bending the first spring blade (41) and the second spring blade (42) so that the first spring blade (41) and the second spring blade (42) form an angle α with respect to the main plane of the spring ring (4) A method for manufacturing the spring ring (4) comprising the above.

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