Rotary bezel structure and timepiece

Abstract

To provide a rotary bezel structure to which a rotary bezel can be attached more desirably than an existing technique, and a timepiece having the rotary bezel structure.SOLUTION: A rotary bezel structure 1 includes a timepiece case 2, an annular elastic member 3, and a rotary bezel 4. The elastic member 3 is attached to an outer peripheral part of the timepiece case 2 in a radial direction. The rotary bezel 4 is provided farther outside in the radial direction than the timepiece case 2, and is engaged with the timepiece 2 only via the elastic member 3 as well as is rotatably held to the timepiece case 2 by friction engagement with the elastic member 3. A first recessed part 27 is formed to store a part of the elastic member 3 in the outer peripheral part of the timepiece case 2. A second recessed part 40 is formed to store a part of the elastic member 3 in an inner peripheral part of the rotary bezel 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rotating bezel structure and a timepiece. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there is known a configuration in which a rotating bezel is attached to the case of a timepiece such as a wristwatch. For these timepieces, various techniques have been proposed for suitably attaching the rotating bezel to the timepiece case (timepiece body).

[0003] For example, Patent Document 1 discloses a rotating bezel structure having a rotating bezel rotatably attached to a watch case, and an elastic member having an engagement protrusion that engages with the uneven portion of the rotating bezel and capable of elastic deformation in the radial direction. The uneven portion and the engagement protrusion are inclined at a predetermined angle with respect to the radial direction. According to the technology described in Patent Document 1, when the rotating bezel is rotated in the forward direction in which the engagement angle between the uneven portion and the engagement protrusion is relatively gentle, the elastic member is elastically deformed in the radial direction, allowing the rotating bezel to rotate in the forward direction. On the other hand, when a reverse rotation force is applied, the uneven portion and the engagement protrusion are firmly engaged with each other, suppressing the reverse rotation of the rotating bezel. Therefore, it is said that the reverse rotation of the rotating bezel can be suppressed while providing an appropriate clicking sensation when rotating in the forward direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-186355 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the technique described in Patent Document 1 does not disclose in detail a method of holding the rotating bezel in the axial direction relative to the watch case. Here, FIG. 5 is a cross-sectional view of a watch 910 for explaining the engagement state of a watch case 902 and a rotating bezel 904 according to the conventional technique. As shown in FIG. 5, in the conventional technique, after the rotating bezel 904 is fitted into the watch case 902 from one side in the axial direction (the upper side in FIG. 5), a protrusion 961 provided on the watch case 902 and a protrusion 962 provided on the rotating bezel 904 engage with each other, thereby holding the rotating bezel 904 in the axial direction so that it does not come off. Also, in order to suppress rattling in the radial direction, an O-ring 965 is provided between the outer periphery of the watch case 902 and the inner periphery of the rotating bezel 904.

[0006] However, in such conventional technology, the engagement portion between the watch case 902 and the rotating bezel 904 is made of metal parts that bite together, so there is a risk that the metal parts will be scraped off and deteriorated if disassembly and assembly are repeated multiple times. This poses a problem that long-term maintenance is difficult to perform. In addition, high dimensional accuracy is required for the engagement portion (projections 961 and 962 in FIG. 5), so there is a risk that manufacturing will be difficult. Furthermore, there are problems in terms of manufacturability and design freedom, such as the engagement portion deforming when the cross-sectional area of ​​the rotating bezel is small, and assembly cannot be performed when a material with low wear resistance is used.

[0007] Therefore, an object of the present invention is to provide a rotating bezel structure that allows for more convenient mounting of a rotating bezel compared to the prior art, and a timepiece equipped with this rotating bezel structure. [Means for solving the problem]

[0008] In order to solve the above problems, one form of a rotating bezel structure of the present invention comprises a watch case, a ring-shaped elastic member attached to the radial outer periphery of the watch case, and a rotating bezel that is arranged radially outward from the watch case, engages with the watch case only via the elastic member, and is rotatably held relative to the watch case by frictional engagement with the elastic member.

[0009] According to this configuration, the watch case and the rotating bezel are engaged only through the elastic member, so that no metal parts bite into each other at the engagement portion between the watch case and the rotating bezel. This can suppress deterioration of metal parts due to scraping of the engagement portion between the watch case and the rotating bezel. In addition, since it is only necessary to replace the elastic member when the engagement strength is weakened, repeated disassembly and assembly are possible. Therefore, long-term maintenance can be performed compared to the conventional technology. In addition, by using an elastic member in the engagement portion between the watch case and the rotating bezel, the elastic member can absorb errors in processing accuracy. Therefore, compared to the conventional technology in which the watch case and the rotating bezel are directly engaged, the difficulty of processing the engagement portion of the watch case and the rotating bezel can be reduced. Therefore, manufacturability can be improved. In addition, since the watch case and the rotating bezel do not come into direct contact with each other, assembly can be performed regardless of the material of the watch case and the rotating bezel. Furthermore, deformation of each part during disassembly can be suppressed. That is, in the conventional technology in which metal parts are engaged with each other, a removal tool that utilizes the principle of leverage is used during disassembly, and if the cross-sectional area of ​​the rotating bezel is small, the parts are easily deformed by the stress during disassembly. In contrast, according to the configuration of the present invention, since the metal parts are not engaged with each other, the parts are less likely to deform during disassembly. Therefore, parts such as the rotating bezel can be made smaller than in the conventional technology. This improves the design freedom of the rotating bezel structure. Therefore, it is possible to provide a rotating bezel structure that allows a rotating bezel to be attached more suitably than in the prior art.

[0010] In the rotating bezel structure, the elastic member is made of a rubber material.

[0011] According to this configuration, the rotating bezel can be stably held by the elasticity of the rubber. For example, even if a load acts on the rotating bezel in an oblique direction, the rotating bezel can be stably held. Therefore, the rotating bezel can be more suitably attached.

[0012] In addition, in the rotating bezel structure, the rotating bezel is attached to the watch case from one axial side of the watch case, and a chamfered portion is formed on at least one axial side of the elastic member.

[0013] According to this configuration, the surface of the elastic member on the side where the rotating bezel is attached is chamfered, making it easier to attach the rotating bezel to the elastic member from one side in the axial direction, thereby improving the ease of assembling the rotating bezel.

[0014] In addition, in the rotating bezel structure, in a cross-sectional view perpendicular to the extending direction of the elastic member, the inner peripheral portion of the elastic member has a flat portion that fits along the outer peripheral surface of the watch case.

[0015] According to this configuration, the inner periphery of the elastic member is flat, which increases the contact surface with the watch case, thereby preventing the elastic member from shifting out of position relative to the watch case. Therefore, compared to an elastic member whose cross section is entirely curved, such as an O-ring, the elastic member can be held more stably against the watch case.

[0016] In addition, in the rotating bezel structure, a first recess is formed on the outer periphery of the watch case to accommodate a portion of the elastic member, and a second recess is formed on the inner periphery of the rotating bezel to accommodate a portion of the elastic member, and when the elastic member is accommodated in the first recess and the second recess and the rotating bezel is attached to the watch case, the outer periphery of the watch case and the inner periphery of the rotating bezel face each other with a gap.

[0017] According to this configuration, by accommodating the elastic member in the first recess, it is possible to suppress axial displacement of the elastic member relative to the watch case. Similarly, by accommodating the elastic member in the second recess, it is possible to suppress axial displacement of the elastic member relative to the rotating bezel. Furthermore, by providing the first recess and the second recess, it is possible to increase the radial thickness of the elastic member. This makes it possible to maintain a high elastic force of the elastic member and improve the holding force of the rotating bezel. Therefore, even if the configuration is such that the metal parts do not bite into each other, the watch case and the rotating bezel can be stably assembled via the elastic member.

[0018] Furthermore, in the rotating bezel structure, the second recess has a larger width dimension along the axial direction of the watch case than the first recess.

[0019] According to this configuration, the allowance for the elastic member to be crushed when the watch case and the rotating bezel are assembled can be secured on the second recess side. Therefore, it is possible to suppress the occurrence of positional deviations and the like due to deformation of the elastic member. In addition, since the second recess can absorb the axial expansion caused by the elastic member being crushed, it is possible to suppress the deterioration of the assembly workability caused by the deformed elastic member jumping out of each recess. Therefore, it is possible to improve the stability and workability during assembly.

[0020] In the rotating bezel structure, the first recess has a depth dimension along the radial direction that is greater than the depth dimension along the radial direction of the second recess.

[0021] According to this configuration, the elastic member can be attached stably, particularly to a watch case in which the first recess is formed, thereby improving the retention force of the elastic member in the watch case.

[0022] A timepiece according to one embodiment of the present invention comprises the above-mentioned rotating bezel structure and a movement disposed inside the watch case.

[0023] According to this configuration, in a watch equipped with a rotating bezel, the rotating bezel can be attached while preventing the metal parts of the watch case and the rotating bezel from biting together. Therefore, it is possible to provide a timepiece equipped with a rotating bezel structure that allows for more suitable mounting of the rotating bezel compared to the prior art. Effect of the Invention

[0024] According to the present invention, it is possible to provide a rotating bezel structure that allows a rotating bezel to be attached more conveniently than in the prior art, and a timepiece equipped with this rotating bezel structure. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a cross-sectional view of a timepiece according to a first embodiment. [Diagram 2] FIG. 6 is a cross-sectional view of an elastic member according to a modified example of the first embodiment. [Diagram 3] FIG. 11 is a cross-sectional view of an elastic member according to another modified example of the first embodiment. [Figure 4] FIG. 11 is a cross-sectional view of an elastic member according to another modified example of the first embodiment. [Diagram 5] 1 is a cross-sectional view of a timepiece for explaining the engagement state between a timepiece case and a rotating bezel according to the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are used for components having the same or similar functions. And, duplicated descriptions of those components may be omitted. In the following description, the direction along the central axis C of the hands of the timepiece 10 may be referred to as the axial direction, the direction perpendicular to the axial direction may be referred to as the radial direction, and the direction around the central axis C may be referred to as the circumferential direction.

[0027] (First embodiment) FIG. 1 is a cross-sectional view of a timepiece 10 according to the first embodiment. Timepiece 10 is constructed by incorporating a rotating bezel structure 1 including a watch case 2, a movement 11 housed inside watch case 2, a dial (not shown) having a scale (not shown) that indicates information related to the time, a glass 6 that covers the dial, a back cover 7, various hands (not shown), and the like. Timepiece 10 comprises rotating bezel structure 1 and movement 11. Timepiece 10 is, for example, a wristwatch. In the following explanation, the direction from the back cover 7 toward the dial (glass 6) is referred to as the top, and the opposite side as the bottom. Also, looking from the top to the bottom is referred to as a "planar view."

[0028] The rotating bezel structure 1 comprises a watch case 2, an elastic member 3, a rotating bezel 4, and a click mechanism 5. The watch case 2 is formed in a circular ring shape in a plan view. A space is provided inside the watch case 2 to house a movement 11. The upper surface of the watch case 2 is formed from a transparent material such as glass 6, and is the top surface from which the internal dial (not shown) can be seen. The lower surface of the watch case 2 is formed from, for example, a back cover 7, and is the bottom surface that faces the user's arm when the watch 10 is worn.

[0029] A rotating bezel 4, which will be described in detail later, is rotatably attached to the top surface of the watch case 2. The watch case 2 has a step portion 21 on its outer periphery. The step portion 21 opens to the outer periphery and upper surface of the watch case 2, and is recessed toward the inner periphery and downward of the watch case 2. The step portion 21 is formed in an annular shape in a plan view of the watch case 2. A crystal 6 is attached to the inner periphery of the step portion 21 via a compression packing 22.

[0030] A click mechanism accommodating section 24 is formed on the surface of the step section 21 of the watch case 2 facing upward. The click mechanism accommodating section 24 is formed so as to be recessed downward from the upper surface of the step section 21. A plurality of click mechanism accommodating sections 24 are provided, for example, at equal intervals along the circumferential direction of the watch 10. Note that the click mechanism accommodating section 24 may be provided, for example, at any one location in the circumferential direction of the watch case 2. The click mechanism accommodating section 24 is formed in a circular shape in a plan view perpendicular to the depth direction of the click mechanism accommodating section 24. The lower end of the click mechanism accommodating section 24 is a bottom 25, which terminates inside the watch case 2. The click mechanism accommodating section 24 accommodates a click mechanism 5, which will be described in detail later.

[0031] A first recess 27 is formed on the surface of step portion 21 of watch case 2 facing radially outward (outer periphery). First recess 27 is formed so as to be recessed from the surface of step portion 21 facing the outer periphery towards the inner periphery. First recess 27 is formed over the entire circumferential direction of watch case 2. In other words, first recess 27 is formed in an annular shape when seen in a plan view of watch case 2. First recess 27 accommodates at least a portion of elastic member 3, which will be described in detail later.

[0032] The elastic member 3 is attached to the outer periphery in the radial direction of the watch case 2. The elastic member 3 is formed in an annular shape, and a part of it is housed in the first recess 27 of the watch case 2. When the elastic member 3 is housed in the first recess 27, a part of the elastic member 3 protrudes radially outward from the outer periphery of the watch case 2 (i.e., the outer periphery of the step portion 21). That is, the thickness dimension along the radial direction of the elastic member 3 is greater than the depth dimension along the radial direction of the first recess 27. In a cross-sectional view perpendicular to the extension direction of the elastic member 3 (the circumferential direction of the watch case 2), the inner periphery of the elastic member 3 has a flat portion 31 parallel to the central axis C. The flat portion 31 of the elastic member 3 abuts against the bottom of the first recess 27. This allows the elastic member 3 to be stably held in the first recess 27 of the watch case 2.

[0033] When the elastic member 3 is housed in the first recess 27 of the watch case 2, a chamfered portion 33 is formed on at least a surface of the elastic member 3 facing upward in the axial direction (one side in the axial direction in the claims). The chamfered portion 33 includes an inclined surface portion formed flat and a curved surface portion formed curvedly. In this embodiment, in a cross-sectional view perpendicular to the extension direction of the elastic member 3, the surface of the elastic member 3 facing radially outward is formed in an arc shape, so that the chamfered portion 33 is provided on both the upper and lower surfaces of the elastic member 3 in the axial direction.

[0034] In this embodiment, the elastic member 3 is made of a rubber material. The hardness of the elastic member 3 is, for example, A55 or more and A65 or less. The elastic member 3 is, for example, nitrile rubber, acrylic rubber, or the like.

[0035] The rotating bezel 4 is formed in a circular ring shape of the same size as the watch case 2 in a plan view. The rotating bezel 4 is arranged so as to overlap the watch case 2 in a plan view. The lower part of the rotating bezel 4 is provided at a position corresponding to the step portion 21 of the watch case 2. Specifically, the lower part of the rotating bezel 4 is provided so as to face the outer periphery of the step portion 21 radially outward from the outer periphery of the step portion 21 of the watch case 2. The rotating bezel 4 does not come into direct contact with the watch case 2, and is engaged with the watch case 2 substantially only via the elastic member 3 as a retaining member that holds the rotating bezel 4 to the watch case 2. The rotating bezel 4 is attached rotatably to the outer periphery of the watch case 2 by frictional engagement with the elastic member 3.

[0036] A second recess 40 is formed on the inner periphery of the rotating bezel 4 that faces the watch case 2 in the radial direction. The second recess 40 is formed so as to be recessed from the inner periphery of the rotating bezel 4 toward the outside in the radial direction. The second recess 40 is formed over the entire circumferential direction of the rotating bezel 4. The second recess 40 accommodates a portion of the elastic member 3 that protrudes radially outward beyond the first recess 27.

[0037] The rotating bezel 4 is attached to the watch case 2 from above in the axial direction of the watch case 2. In a state in which the elastic member 3 is housed in the first recess 27 and the second recess 40 and the rotating bezel 4 is attached to the watch case 2 (the state shown in FIG. 1), the outer periphery of the watch case 2 and the inner periphery of the rotating bezel 4 face each other with a gap S therebetween.

[0038] 1, the width dimension along the axial direction of the second recess 40 is greater than the width dimension along the axial direction of the first recess 27. Also, the depth dimension along the radial direction of the first recess 27 is greater than the depth dimension along the radial direction of the second recess 40. This allows the elastic member 3 to be stably held in the first recess 27 in particular, and ensures that a crushing allowance for the elastic member 3 is provided on the second recess 40 side when the watch case 2 and the rotating bezel 4 are engaged.

[0039] The click mechanism 5 is housed in the click mechanism housing 24 of the watch case 2. The click mechanism 5 is configured such that a head 51 can be moved up and down, for example, by a biasing member (not shown), and this head 51 engages with an uneven portion 41 formed on the lower part of the rotating bezel 4, thereby generating a clicking sensation when the rotating bezel 4 is rotated relative to the watch case 2. Note that the configuration of the click mechanism 5 is not limited to the above-mentioned configuration, and for example, the clicking sensation may be generated by the elastic force of the elastic member 3. In addition, a latch function that suppresses reverse rotation of the rotating bezel 4 may also be provided.

[0040] (Modification of the first embodiment) Next, each modified example of the first embodiment of the present invention will be described. Fig. 2 is a cross-sectional view of an elastic member 203 according to a modified example of the first embodiment. Fig. 3 is a cross-sectional view of an elastic member 303 according to another modified example of the first embodiment. Fig. 4 is a cross-sectional view of an elastic member 403 according to another modified example of the first embodiment. In each modified example, the cross-sectional shape of the elastic member 3 differs from that of the first embodiment described above.

[0041] The elastic members 203, 303, and 403 of each modification are formed in an annular shape, and have a chamfered portion 33 on the surface facing the axially upward side when attached to the watch case 2, as in the first embodiment. Specifically, in the modification shown in FIG. 2, in a cross-sectional view perpendicular to the extension direction of the elastic member 203, a slope 235 and an arc-shaped portion 236 are provided on the surface of the elastic member 203 facing the radially outward side. The slope 235 is provided on the axially upper surface of the elastic member 203. The slope 235 is inclined so as to be positioned from the top to the bottom as it moves from the inner side to the outer side in the radial direction. This slope 235 is the chamfered portion 33. The arc-shaped portion 236 is formed in an arc shape that connects the lower end of the slope 235 and the lower end of the elastic member 3.

[0042] 3, in a cross-sectional view perpendicular to the extending direction of the elastic member 303, a curved portion 345 is provided on a surface of the elastic member 303 facing radially outward. The curved portion 345 is provided on an upper surface of the elastic member 303 in the axial direction. The curved portion 345 is curved so as to be convex toward the upper side in the axial direction and toward the outer side in the radial direction. The curved portion 345 is used as the chamfered portion 33.

[0043] In the modified example shown in FIG. 4, in a cross-sectional view perpendicular to the extending direction of the elastic member 403, a first inclined surface 455, a second inclined surface 456, and a connecting portion 457 are provided on a surface of the elastic member 403 facing the radially outward direction. The first inclined surface 455 is provided on an upper surface of the elastic member 403 in the axial direction. The first inclined surface 455 is inclined so as to be positioned from the upper side to the lower side as it moves from the inner side to the outer side in the radial direction. This first inclined surface 455 is the chamfered portion 33. The second inclined surface 456 is provided on a lower surface of the elastic member 403 in the axial direction. The second inclined surface 456 is inclined so as to be positioned from the lower side to the upper side as it moves from the inner side to the outer side in the radial direction. The connecting portion 457 connects the lower end of the first inclined surface 455 and the upper end of the second inclined surface 456, and is formed in a planar shape that is approximately parallel to the axial direction in a cross-sectional view. In this way, the elastic members 203, 303, and 403 having the shapes shown in the respective modified examples may be used in place of the elastic member 3 of the first embodiment.

[0044] (Action, effect) Next, the operation and effects of the above-mentioned rotating bezel structure 1 and timepiece 10 will be explained. According to the rotating bezel structure 1 of this embodiment, the rotating bezel structure 1 includes a watch case 2, an annular elastic member 3, and a rotating bezel 4 that engages with the watch case 2 only through the elastic member 3 and is held rotatably relative to the watch case 2 by frictional engagement with the elastic member 3. According to this configuration, the watch case 2 and the rotating bezel 4 engage only through the elastic member 3, so that no metal parts bite into each other at the engagement portion between the watch case 2 and the rotating bezel 4. This can suppress deterioration of metal parts due to scraping of the engagement portion between the watch case 2 and the rotating bezel 4. In addition, since it is only necessary to replace the elastic member 3 when the engagement strength is weakened, repeated disassembly and assembly are possible. Therefore, long-term maintenance can be performed compared to the conventional technology. In addition, by using the elastic member 3 in the engagement portion between the watch case 2 and the rotating bezel 4, the elastic member 3 can absorb errors in processing accuracy. Therefore, compared to the conventional technology in which the watch case 2 and the rotating bezel 4 are directly engaged, the difficulty of processing the engagement portion between the watch case 2 and the rotating bezel 4 can be eased. Therefore, manufacturability can be improved. In addition, since the watch case 2 and the rotating bezel 4 do not come into direct contact with each other, assembly can be performed regardless of the materials of the watch case 2 and the rotating bezel 4. Furthermore, deformation of each part during disassembly can be suppressed. That is, in the conventional technology in which metal parts are engaged with each other, a removal jig utilizing the principle of leverage is used during disassembly, and if the cross-sectional area of ​​the rotating bezel 4 is small, the parts are easily deformed by the stress during disassembly. In contrast, according to the configuration of the present invention, since metal parts are not biting into each other, the parts are less likely to deform during disassembly. Therefore, parts such as the rotating bezel 4 can be made smaller than in the conventional technology. This improves the design freedom of the rotating bezel structure 1. Therefore, it is possible to provide a rotating bezel structure 1 that allows the rotating bezel 4 to be attached more suitably than in the prior art.

[0045] The elastic member 3 is made of a rubber material. With this configuration, the elasticity of the rubber allows the rotating bezel 4 to be stably held. For example, even if a load acts on the rotating bezel 4 in an oblique direction, the rotating bezel 4 can be stably held. Therefore, the rotating bezel 4 can be more suitably attached.

[0046] The rotating bezel 4 is attached to the watch case 2 from one side (above) in the axial direction of the watch case 2, and a chamfered portion 33 is formed on at least the upper axial side of the elastic member 3. With this configuration, the surface of the elastic member 3 on which the rotating bezel 4 is attached is the chamfered portion 33, making it easier to attach the rotating bezel 4 to the elastic member 3 from one side in the axial direction. This improves the ease of assembling the rotating bezel 4.

[0047] In a cross-sectional view perpendicular to the extension direction of the elastic member 3, the inner periphery of the elastic member 3 has a flat portion 31 that fits along the outer periphery of the watch case 2. With this configuration, the inner periphery of the elastic member 3 is flat, which increases the contact surface with the watch case 2, thereby suppressing positional deviation of the elastic member 3 relative to the watch case 2. Therefore, compared to cases where the cross section of the elastic member 3 is entirely formed from curved surfaces, such as an O-ring, the elastic member 3 can be held more stably against the watch case 2.

[0048] The watch case 2 has a first recess 27, the rotating bezel 4 has a second recess 40, and when the elastic member 3 is housed in the first recess 27 and the second recess 40 and the rotating bezel 4 is attached to the watch case 2, the outer periphery of the watch case 2 and the inner periphery of the rotating bezel 4 face each other with a gap S. According to this configuration, by housing the elastic member 3 in the first recess 27, it is possible to suppress the axial positional deviation of the elastic member 3 relative to the watch case 2. Similarly, by housing the elastic member 3 in the second recess 40, it is possible to suppress the axial positional deviation of the elastic member 3 relative to the rotating bezel 4. Furthermore, by providing the first recess 27 and the second recess 40, it is possible to increase the radial thickness of the elastic member 3. This maintains the elastic force of the elastic member 3 high and improves the holding force of the rotating bezel 4. Therefore, even if the configuration is such that the metal parts do not bite into each other, the watch case 2 and the rotating bezel 4 can be stably assembled via the elastic member 3.

[0049] The second recess 40 has a larger width dimension along the axial direction of the watch case 2 than the first recess 27. With this configuration, a crushing margin for the elastic member 3 when the watch case 2 and the rotating bezel 4 are assembled can be secured on the second recess 40 side. This makes it possible to suppress the occurrence of positional deviations and the like due to deformation of the elastic member 3. In addition, since the second recess 40 can absorb the axial expansion caused by the elastic member 3 being crushed, it is possible to suppress a decrease in the ease of assembly caused by the deformed elastic member 3 popping out of each recess. This makes it possible to improve stability and ease of assembly.

[0050] The radial depth dimension of the first recess 27 is greater than the radial depth dimension of the second recess 40. With this configuration, the elastic member 3 can be stably attached to the watch case 2 in which the first recess 27 is formed, in particular. This improves the retention force of the elastic member 3 in the watch case 2.

[0051] The timepiece 10 of this embodiment includes the above-mentioned rotating bezel structure 1 and a movement 11 arranged inside the watch case 2. With this configuration, in the timepiece 10 including the rotating bezel 4, it is possible to attach the rotating bezel 4 while preventing the metal parts of the watch case 2 and the rotating bezel 4 from biting together. Therefore, it is possible to provide a timepiece 10 equipped with a rotating bezel structure 1 that allows for more suitable mounting of the rotating bezel 4 compared to the prior art.

[0052] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the first embodiment described above, the rotating bezel 4 is attached to the watch case 2 to which the elastic member 3 is attached, but this is not limited to the above. The rotating bezel 4 to which the elastic member 3 is attached may be attached to the watch case 2. In this case, a chamfered portion 33 may be provided on the inner periphery of the elastic member 3 and below in the axial direction.

[0053] The material of the elastic member 3 is not limited to the materials in the above-mentioned embodiment. For example, the elastic member 3 may be a rubber other than the nitrile rubber and acrylic rubber described in the embodiment, such as silicone rubber. Also, for example, the elastic member 3 may be made of a resin material. The elastic member 3 may be formed without having a flat surface 31 on the inner circumference. In other words, the flat surface 31 may not be present. In this case, the dimensions or shape of each component may be set to increase the elongation rate of the elastic member 3, for example by increasing the depth of the groove when attaching the elastic member 3. However, the configuration of this embodiment in which the elastic member 3 has the flat surface 31 on the inner circumference is advantageous in that it is possible to suppress misalignment of the elastic member 3 with respect to the watch case 2 with a simpler configuration.

[0054] In addition, within the scope of the invention, the components in the above-described embodiments may be replaced with well-known components, and the above-described embodiments may be combined as appropriate. [Explanation of symbols]

[0055] 1 Rotating bezel structure 2,902 Watch Cases 3,203,303,403 Elastic members 4,904 Rotating Bezel 10,910 Watches 11. Movement 27 First Recess 31 Plane part 33 Chamfered part 40 Second recess S Gap

Claims

1. A watch case and An annular elastic member attached to the radially outer periphery of the watch case; a rotating bezel that is provided radially outward of the watch case, engages with the watch case only via the elastic member, and is rotatably held relative to the watch case by frictional engagement with the elastic member; Equipped with a rotating bezel structure.

2. 2. The rotating bezel structure according to claim 1, wherein the elastic member is made of a rubber material.

3. The rotating bezel is attached to the watch case from one side in the axial direction of the watch case, 3. The rotating bezel structure according to claim 1, wherein a chamfer is formed on at least one side of the elastic member in the axial direction.

4. 3. The rotating bezel structure according to claim 1, wherein an inner circumferential portion of the elastic member has a flat portion that fits along an outer circumferential surface of the watch case in a cross-sectional view perpendicular to an extending direction of the elastic member.

5. A first recess is formed in the outer circumferential portion of the watch case to accommodate a portion of the elastic member, a second recess that accommodates a portion of the elastic member in an inner peripheral portion of the rotating bezel; 3. The rotating bezel structure according to claim 1, wherein when the elastic member is housed in the first recess and the second recess and the rotating bezel is attached to the watch case, the outer periphery of the watch case and the inner periphery of the rotating bezel face each other with a gap.

6. The rotating bezel structure according to claim 5 , wherein the second recess has a width dimension along the axial direction of the watch case that is greater than that of the first recess.

7. The rotating bezel structure according to claim 5 , wherein a depth dimension of the first recess along the radial direction is greater than a depth dimension of the second recess along the radial direction.

8. The rotating bezel structure according to claim 1 ; a movement disposed inside the watch case; A watch equipped with.

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