CN113985715A

CN113985715A - Rotating device and timepiece

Info

Publication number: CN113985715A
Application number: CN202111289302.1A
Authority: CN
Inventors: 长泽翔太
Original assignee: Casio Computer Co Ltd
Current assignee: Casio Computer Co Ltd
Priority date: 2019-03-25
Filing date: 2020-03-18
Publication date: 2022-01-28
Anticipated expiration: 2040-03-18
Also published as: JP6835124B2; CN111736443A; JP2020159720A; CN111736443B; CN113985715B

Abstract

The invention provides a rotating device which can finely limit the rotating angle of a rotating component without increasing the number of arranged clamping concave parts and can realize miniaturization and a clock with the rotating device. The disclosed device is provided with: a rotary bezel (11) rotatably provided on the outer periphery of the wristwatch case (1) and provided with engaging recesses at equal intervals in the circumferential direction on the lower surface as a rotary surface orthogonal to the central axis; and first and second rotation restricting members (12, 13) which are engaged with any one of the engaging recesses (18) in a phase-shifted state to restrict the rotational position of the rotary bezel. Therefore, the first and second rotation restricting members can restrict the rotation position of the rotary bezel by 2 times of the number of the arrangement of the engaging recesses (18) during one rotation of the rotary bezel, and the rotation angle of the rotary bezel can be finely restricted by the number of the arrangement of the engaging recesses. Further, the outer diameter of the rotary bezel does not increase, and therefore, the entire wristwatch can be downsized.

Description

Rotating device and timepiece

The application is a divisional application; the parent application has the application number of 2020101929311 and the name of the invention is 'rotating device and clock'.

Technical Field

The present invention relates to a rotation device used for a timepiece such as a wristwatch and a timepiece including the rotation device.

Background

For example, as described in patent document 1, a rotation device for a wristwatch has been known which has the following structure: when the rotary bezel is rotatably disposed on the outer periphery of the watch case, a rotation restricting member formed by bending a rod-like member into a substantially annular shape is disposed therebetween, and the rotary bezel is rotated in one direction by giving a click feeling to the rotation restricting member.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2002-181960

In this type of rotary device, saw-toothed locking teeth are provided as engagement recesses on an outer peripheral surface of the watch case, a fixing portion for fixing one end portion of the rotation restricting member is provided on an inner peripheral surface of the rotary bezel, and a notch recess for elastically deforming the other end portion of the rotation restricting member in a radial direction is provided on the inner peripheral surface of the rotary bezel in order to lock the other end portion of the rotation restricting member to the locking teeth of the watch case.

In this case, the rotation restricting member is attached to the inner peripheral surface of the rotary bezel by disposing the other end portion of the rotation restricting member in the notch recess of the inner peripheral surface of the rotary bezel, and the other end portion of the rotation restricting member is elastically locked to the locking teeth of the outer peripheral surface of the watch case when the rotary bezel is attached to the outer peripheral surface of the watch case together with the rotation restricting member in this state.

Disclosure of Invention

Means for solving the problems

The present invention is a rotary device, including: a rotating member rotatably provided on an outer periphery of the apparatus main body, and having engaging recesses provided at equal intervals in a circumferential direction on a rotating surface orthogonal to the central axis; and a plurality of regulating members which are capable of engaging with any one of the engaging recesses in a state of phase shift to regulate the rotational position of the rotating member.

Drawings

Fig. 1 is an enlarged front view showing one embodiment of applying the present invention to a wristwatch.

Fig. 2 is an enlarged cross-sectional view showing a main part of the wristwatch shown in fig. 1 viewed from a-a.

Fig. 3 is an enlarged cross-sectional view showing a main part of the wristwatch shown in fig. 1 viewed from B-B.

Fig. 4 is an enlarged perspective view showing a rotation device of the wristwatch shown in fig. 1 in an exploded manner.

Fig. 5 is an enlarged front view showing the watch case shown in fig. 4.

Fig. 6 (a) to (d) show the rotary bezel shown in fig. 4, (a) is an enlarged side view thereof, (b) is an enlarged rear view thereof, (C) is an enlarged view showing a main part of the rotary bezel shown in (b), and (d) is an enlarged sectional view of a main part seen from C-C of (C).

Fig. 7 (a) and (b) are enlarged sectional views of the first and second rotation restricting members of the rotation device shown in fig. 4, respectively, wherein (a) is an enlarged sectional view of a main portion showing a state where the first and second rotation restricting members are disposed in the first and second housing holes of the wristwatch case, and (b) is an enlarged perspective view showing the restricting pieces of the first and second rotation restricting members, respectively.

Fig. 8 (a) and (b) are enlarged cross-sectional views of main portions of the rotating device shown in fig. 4, the first to third support members being disposed in the first to third holding holes of the watch case, and the support pieces of the first to third support members being illustrated in an enlarged perspective view.

Fig. 9 is an enlarged cross-sectional view of a main portion showing a state where the first rotation restricting member is engaged with the engaging recess of the rotary bezel and the second rotation restricting member is disengaged from the engaging recess of the rotary bezel, as seen from D-D direction of the rotary device shown in fig. 2.

Fig. 10 is an enlarged cross-sectional view of a main portion showing a state in which the rotary bezel rotates, the first rotation restricting member is disengaged from the engaging recess of the rotary bezel, and the second rotation restricting member is engaged with the engaging recess of the rotary bezel in the rotary device shown in fig. 9.

Fig. 11 is an enlarged cross-sectional view of a main portion showing a state where the first to third support members support the rotary bezel, as viewed from E-E of the rotary device shown in fig. 3.

Detailed Description

An embodiment in which the present invention is applied to a wristwatch will be described below with reference to fig. 1 to 11.

As shown in fig. 1, the wristwatch includes a metallic wristwatch case 1 as a device main body. The band attaching portions 2 are provided on the respective side portions of the wristwatch case 1 at the 12 o 'clock side and the 6 o' clock side. The wristwatch case 1 is provided with push-button switches 3 on the 2 o ' clock side, the 4 o ' clock side, and the 8 o ' clock side, respectively.

As shown in fig. 1 to 4, a watch glass 4 is provided on the upper opening of the watch case 1 via a glass seal 4 a. A back cover 5 is attached to a lower portion of the wristwatch case 1 via a waterproof ring 5 a. A timepiece module 6 is provided inside the wristwatch case 1 via an intermediate frame 7.

In this case, a dial (not shown) is provided on the upper portion of the timepiece module 6, and as shown in fig. 2 and 3, a separating member 8 is disposed on the outer periphery of the dial. The timepiece module 6 includes various devices necessary for a timepiece function, such as a timepiece movement for moving hands above a dial, a display panel for electro-optically displaying information such as time, and a circuit portion for electrically driving the above components, although not shown.

However, as shown in fig. 1 to 4, a rotation device 10 is provided on the outer periphery of the upper portion of the wristwatch case 1 as the device main body. In this case, a notch 9 is provided on the outer periphery of the upper portion of the wristwatch case 1 over the entire periphery. The rotation device 10 includes a rotary bezel 11 as a rotation member disposed in the cutout portion 9 of the wristwatch case 1, first and second

rotation restricting members

12, 13 for restricting the rotation position of the rotary bezel 11, and first to third support members 14 to 16 for supporting the rotary bezel 11.

As shown in fig. 1 to 4, the rotary bezel 11 is formed annularly from a metal such as titanium or stainless steel or a hard synthetic resin. The rotary bezel 11 is rotatably attached to an outer peripheral cutout portion 9 via an annular seal 17, and the outer peripheral cutout portion 9 is positioned at an upper portion of the wristwatch case 1.

That is, as shown in fig. 2 and 3, a fitting recess 11a for fitting the seal 17 is provided on the inner peripheral surface of the rotary bezel 11. An engagement portion 11b that engages with a locking projection 9a provided on the inner peripheral surface of the notch portion 9 of the wristwatch case 1 is provided on the inner peripheral surface of the rotary bezel 11 located below the fitting recess 11 a.

Therefore, as shown in fig. 2 and 3, the rotary bezel 11 is configured to fit into the cutout portion 9 located on the outer periphery of the upper portion of the watch case 1 from above in a state where the seal 17 is fitted in the fitting recess 11a, and to engage the engagement portion 11b with the locking projection 9a of the cutout portion 9 of the watch case 1. Thus, the rotary bezel 11 is attached rotatably to the notch 9 on the upper outer periphery of the wristwatch case 1 without coming off above the wristwatch case 1.

As shown in fig. 2 to 4 and 6, a plurality of (e.g., 60) engaging recesses 18 are provided at equal intervals along the circumference on the lower surface of the rotary bezel 11, that is, the lower surface of the rotary surface orthogonal to the central axis of the rotary bezel 11. The plurality of engaging recesses 18 each have a substantially trapezoidal cross section.

That is, as shown in fig. 6 (b) to 6 (d), the engaging recess 18 is configured such that a first inclined portion 18a is provided on an inner surface located on the opposite side to one direction (arrow X direction) of the rotational direction of the rotary bezel 11, a second inclined portion 18b is provided on an inner surface located on one direction of the rotational direction of the rotary bezel 11, and a bottom portion 18c is provided between the first inclined portion 18a and the second inclined portion 18 b.

In this case, as shown in fig. 6 (d), the first inclined portion 18a is provided to be inclined at an angle of about 40 ° from the lower surface of the rotary bezel 11 toward one direction of the rotation direction thereof (arrow X direction). Thus, when the rotary bezel 11 is rotated in one direction, the first inclined portion 18a is configured to slide the below-described regulating pieces 20 of the first and second

rotation regulating members

12 and 13 in contact with each other, thereby pressing down the regulating pieces 20 of the first and second

rotation regulating members

12 and 13.

As shown in fig. 6 (d), the second inclined portion 18b is provided to be inclined at an angle of about 70 ° from the lower surface of the rotary bezel 11 toward the direction opposite to one direction (arrow X direction) of the rotation direction thereof. Thus, the second inclined portion 18b is configured to restrict the rotation of the rotary bezel 11 in the direction opposite to the one direction by the restricting pieces 20 of the first and second

rotation restricting members

12, 13 coming into contact with each other or coming apart from each other when the first and second

rotation restricting members

12, 13 are alternately inserted into the engagement recess 18.

As shown in fig. 2 and 7, the first and second

rotation restricting members

12 and 13 each include: a restricting piece 20 for restricting the rotation of the rotary bezel 11; and a regulating spring 21 as a coil spring for biasing the regulating piece 20 in a direction of pressing the regulating piece against a lower surface as a rotation surface of the rotary bezel 11. The regulating piece 20 includes: a protrusion 22 capable of being inserted into any one of the plurality of engaging recesses 18 provided on the lower surface of the rotating bezel 11; a pedestal portion 23 having the projection 22 on the upper surface; and a guide shaft 24 provided on a lower surface of the pedestal portion 23 and guiding the regulating spring 21, the above components being integrally formed of a hard synthetic resin having slidability.

In this case, as shown in fig. 2, 5, and 7, the first and second

rotation restriction members

12 and 13 are respectively configured to be disposed in first and

second housing holes

25 and 26 provided at predetermined positions on the bottom surface of the cutout portion 9 of the wristwatch case 1. Of the first and second receiving

holes

25 and 26, the first receiving hole 25 is provided in a portion avoiding the push switch 3, for example, a portion located on the 7-point side, in the bottom surface of the cutout portion 9 of the wristwatch case 1. Similarly, the second housing hole 26 is provided at a position located on the 11 o' clock side, for example.

That is, as shown in fig. 2, 5, and 7, the first and second receiving

holes

25 and 26 each include: a large-diameter hole portion 27 provided at a portion located on an upper side in the vertical direction and in which the respective seat portions 23 of the first and second

rotation restricting members

12 and 13 are arranged so as to be movable in the vertical direction; and a small-diameter hole 28 provided at a position on the lower side and in which the guide shafts 24 of the first and second

rotation restricting members

12, 13 and the restricting spring 21 are disposed.

As shown in fig. 2, 5, and 7, the outer shape of large-diameter hole 27 is slightly larger than the outer shape of base 23, and the shape thereof is formed into a non-circular shape such as a substantially elliptical shape similar to the shape of base 23. Thus, the first and second

rotation restricting members

12 and 13 are configured not to rotate about the guide shafts 24 in the first and

second housing holes

25 and 26.

As shown in fig. 2, 5, and 7, the small-diameter hole portion 28 is formed in a circular shape slightly larger than the outer diameter of the restraining spring 21 and smaller than the outer diameter of the base portion 23. Therefore, when the restricting spring 21 is accommodated in the small-diameter hole portion 28 together with the guide shaft 24, the upper end portion of the restricting spring 21 is elastically contacted with the lower surface of the seat portion 23, and the lower end portion is elastically contacted with the bottom portion of the small-diameter hole portion 28.

Thus, as shown in fig. 7, the regulating spring 21 is configured to bias the base 23 in a direction of pushing out the base upward from the first and

second housing holes

25 and 26. In this case, the elastic force of the restraining spring 21 is set to the following degree: when the projection 22 is pushed out toward the upper side of the first and

second housing holes

25 and 26 by the elastic force thereof, even if the upper side of the pedestal portion 23 protrudes above the first and

second housing holes

25 and 26, the lower side of the pedestal portion 23 is maintained in the state of being disposed in the large-diameter holes 27 of the first and

second housing holes

25 and 26.

On the other hand, as shown in fig. 2 and 7, the protrusion 22 of each of the restricting pieces 20 of the first and second

rotation restricting members

12 and 13 is formed in a mountain-like shape that can be inserted into the engaging recess 18 of the rotary bezel 11. That is, the protrusion 22 includes a sliding portion 22a that is depressed by sliding of the first inclined portion 18a in the engagement recess 18 of the rotary bezel 11, and an abutting portion 22b that abuts against the second inclined portion 18b of the engagement recess 18 so as to be able to contact with or separate from it.

In this case, as shown in fig. 2 and 7, the height of the mountain shape of the protrusion 22, that is, the length of protrusion from the pedestal portion 23 toward the rotary bezel 11 is formed to be substantially the same as or slightly longer than the depth of the engaging recess 18 of the rotary bezel 11. Thus, the protrusion 22 is configured such that the upper end 22c of the mountain shape abuts against the bottom 18c of the engaging recess 18 when inserted into the engaging recess 18.

In this case, as shown in fig. 2 and 7, the slide portion 22a is formed substantially parallel to the first inclined portion 18a of the engagement recess 18 of the rotary bezel 11. The contact portion 22b is formed substantially parallel to the second inclined portion 18b of the engagement recess 18. The upper end 22c of the protrusion 22, i.e., the upper end 22c of the chevron shape, is arcuate.

Thus, as shown in fig. 2 and 7, when the engagement recess 18 of the rotary bezel 11 is inserted and the upper end portion 22c of the chevron shape abuts against the bottom portion 18c of the engagement recess 18, the protrusion 22 is configured such that the sliding portion 22a faces the first inclined portion 18a of the engagement recess 18 with a gap therebetween and the abutment portion 22b faces the second inclined portion 18b of the engagement recess 18.

In this case, as shown in fig. 7, the outer shape of each seat portion 23 of the first and second

rotation restricting members

12 and 13 is a non-circular shape such as an elliptical shape, and is configured so as not to rotate about the guide shaft 24 in the first and

second housing holes

25 and 26 when inserted into the large-diameter hole portions 27 of the first and

second housing holes

25 and 26.

As shown in fig. 2 and 7, the base portion 23 is configured to be disposed below the rotary bezel 11 with a slight gap between the upper surface of the base portion 23 and the lower surface of the rotary bezel 11 when the projection 22 is inserted into the engagement recess 18 of the rotary bezel 11, and the upper surface of the base portion 23 is disposed on substantially the same plane as the bottom surface of the notch 9 of the wristwatch case 1 located at the upper end of the first and second receiving holes 25, 26.

In a state where the protrusion 22 is inserted into the engagement recess 18 of the rotary bezel 11 as shown in fig. 2 and 7, when the rotary bezel 11 is rotated in one direction (arrow X direction) as shown in fig. 6 (d), the first inclined portion 18a of the engagement recess 18 slides in a state of being in contact with the sliding portion 22a, and the sliding portion 22a is thereby gradually pressed down against the elastic force of the regulating spring 21.

As shown in fig. 2 and 7, when the sliding portion 22a is gradually pressed down against the elastic force of the restricting spring 21, the abutting portion 22b is gradually separated from the second inclined portion 18b of the engaging recess 18, and the upper end portion 22c of the chevron shape is thereby gradually moved out of the engaging recess 18 to the lower side from the inside of the engaging recess 18 over the first inclined portion 18a of the engaging recess 18.

In this case, as shown in fig. 2 and 7, the restricting spring 21 is configured to be compressed by the base portion 23 to increase the rotational force of the rotary bezel 11 when the upper end portion 22c of the projecting portion 22 passes over the second inclined portion 18b of the engaging recess 18, and to be expanded by the compressed restricting spring 21 to rapidly decrease the rotational force of the rotary bezel 11 when the projecting portion 22 is inserted into the adjacent engaging recess 18, thereby giving a click feeling to the rotary bezel 11.

Further, as shown in fig. 2 and 7, in a state of being inserted into the engagement recess 18 of the rotary bezel 11, when the rotary bezel 11 is rotated in a direction opposite to the one direction (arrow X direction) as shown in fig. 6 (d), the projection 22 is configured to maintain a state in which the abutment portion 22b abuts against the second inclined portion 18b of the engagement recess 18, and to prevent the rotary bezel 11 from being rotated in the opposite direction.

However, as shown in fig. 9 and 10, the first and second

rotation restricting members

12 and 13 are configured to be able to engage with any one of the plurality of engagement recesses 18 provided in the rotary bezel 11 in a phase-shifted state to restrict the rotational position of the rotary bezel 11. That is, the first and second

rotation restricting members

12 and 13 are configured such that when the restricting piece 20 of the first rotation restricting member 12 engages with any one of the plurality of engaging concave portions 18, the restricting piece 20 of the second rotation restricting member 13 does not engage with the plurality of engaging concave portions 18 and is disengaged from the engaging concave portion 18.

As shown in fig. 9 and 10, the regulating piece 20 of the first rotation regulating member 12 and the regulating piece 20 of the second rotation regulating member 13 are configured such that when they are disengaged from the engaging recess 18 of the rotary bezel 11, the upper end portion 22c of the protruding portion 22 of the regulating piece 20 abuts against a flat surface portion between the plurality of engaging recesses 18 located on the lower surface of the rotary bezel 11. Therefore, the rotary bezel 11 is configured to be stably rotated to improve operability.

In this case, as shown in fig. 9 and 10, a plurality of 60 engaging recesses 18 are provided at equal intervals in the circumferential direction on the lower surface as the rotating surface of the rotary bezel 11, and when the opening angle, which is the interval between the adjacent engaging recesses 18, is 6 °, the first and second

rotation restricting members

12 and 13 are arranged with a phase difference of 3 ° which is the opening angle obtained by halving the opening angle.

Thus, as shown in fig. 6 (b), even if the rotary bezel 11 is equally divided into the plurality of engaging recesses 18 in the circumferential direction 60, the regulating pieces 20 of the first and second

rotation regulating members

12 and 13 are alternately engaged with the engaging recesses 18 every time the rotary bezel 11 rotates by an angle of 3 °, and the rotational position of the rotary bezel 11 is regulated.

Therefore, as shown in fig. 6 (b), even if the rotary bezel 11 is divided into 60 engaging recesses 18 in the circumferential direction, the position of each of the regulating pieces 20 of the first and second

rotation regulating members

12 and 13 is regulated 120 times for each rotation of the rotary bezel 11. Thus, the first and second

rotation restricting members

12 and 13 are configured to finely restrict the rotation angle of the rotary bezel 11 without increasing the number of the arrangement of the engaging recesses 18.

In this case, the number of the arrangement of the engaging recesses 18 is restricted by the material of the rotary bezel 11. For example, in the case where the rotary bezel 11 is formed of stainless steel having high rigidity, even if 120 engaging recesses 18 are arranged, the abrasion of the engaging recesses 18 is small, and the position can be regulated 120 times per rotation of the rotary bezel 11 by one rotation regulating member. In contrast, when the rotary bezel 11 is formed of titanium or a hard synthetic resin having a rigidity lower than that of stainless steel, if 120 engaging recesses 18 are arranged, abrasion of the engaging recesses 18 is large, and therefore 60 engaging recesses are arranged at a limit.

Therefore, in this embodiment, even if the rotary bezel 11 is formed of a material such as titanium having a lower rigidity than stainless steel, and 60 engaging recesses 18 are arranged, by providing the first and second

rotation restricting members

12 and 13, the position of the rotary bezel 11 can be restricted 120 times per rotation by the phase difference of the restricting pieces 20 of the first and second

rotation restricting members

12 and 13, as in the case where the rotary bezel 11 is formed of stainless steel and the rotational position is restricted by one rotation restricting member.

On the other hand, the first to third support members 14 to 16 are configured to slidably support the lower surface of the rotary bezel 11 as a rotary surface orthogonal to the central axis of the rotary bezel 11 at three points, as shown in fig. 3, 4, 8, and 11. That is, the first to third support members 14 to 16 respectively include a support piece 30 that elastically contacts and supports the lower surface that is the rotating surface of the rotary bezel 11, and a support spring 31 that is a coil spring that biases the support piece 30 in a direction of pressing the support piece against the lower surface that is the rotating surface of the rotary bezel 11.

As shown in fig. 3 and 8, each of the support pieces 30 of the first to third support members 14 to 16 includes a support head 32 that slides while being elastically in contact with the lower surface of the rotary bezel 11, and a guide shaft 33 that is provided on the lower surface of the support head 32 and guides the support spring 31, and these members are integrally formed of a hard synthetic resin having slidability.

The first to third support members 14 to 16 are arranged in first to third holding holes 34 to 36 provided in predetermined positions on the bottom surface of the notch 9 of the wristwatch case 1, as shown in fig. 3 to 5 and 8. The first holding hole portion 34 of the first to third holding hole portions 34 to 36 is provided in a portion of the bottom surface of the cutout portion 9 of the wristwatch case 1 which avoids the push switch 3, for example, a portion located on the 1-point side.

Similarly, as shown in fig. 5, the second holding hole portion 35 is provided in a portion avoiding the push switch 3, for example, a portion located on the 5-point side, on the bottom surface of the cutout portion 9 of the wristwatch case 1. The third holding hole portion 36 is provided in a portion avoiding the push switch 3, for example, a portion located on the 9-point side, on the bottom surface of the cutout portion 9 of the wristwatch case 1.

That is, as shown in fig. 3, 5, and 8, the first to third holding hole portions 34 to 36 include: a large-diameter hole portion 37 provided at a position located on an upper side in the vertical direction and in which the support head portions 32 of the first to third support members 14 to 16 are arranged so as to be movable in the vertical direction; and a small-diameter hole portion 38 provided at a portion located on the lower side and in which the guide shafts 33 of the first to third support members 14 to 16 and the support spring 31 are arranged.

As shown in fig. 3, 5, and 8, the large diameter hole portion 37 is formed in a circular shape having an outer diameter slightly larger than the outer diameter of the support head portion 32. The small-diameter hole portion 38 is formed in a circular shape slightly larger than the outer diameter of the support spring 31 and smaller than the outer diameter of the support head 32. Therefore, when the support spring 31 is accommodated in the small-diameter hole 38 together with the guide shaft 33, the upper end of the support spring 31 is elastically in contact with the lower surface of the support head 32, and the lower end is elastically in contact with the bottom of the small-diameter hole 38.

Thus, as shown in fig. 8 and 11, the support spring 31 is configured to bias the support head 32 in a direction of pushing the support head upward from the first to third holding holes 34 to 36, respectively. In this case, the elastic force of the support spring 31 is set to the following degree: when the support head 32 is pushed out upward of the first to third holding hole portions 34 to 36 by the elastic force thereof, even if the upper side of the support head 32 protrudes upward of the first to third holding hole portions 34 to 36, the lower side of the support head 32 is maintained in the state of being disposed in the large-diameter hole portions 37 of the first to third holding hole portions 34 to 36.

As shown in fig. 3, 8, and 11, the support head 32 of each support piece 30 of the first to third support members 14 to 16 is formed in a cylindrical shape having an outer diameter larger than an opening surface of the engagement recess 18 of the rotary bezel 11, that is, larger than either one of a radial length and a circumferential length of the engagement recess 18. That is, the upper end surface of the support head portion 32, which is the facing surface facing the lower surface of the rotary bezel 11, is formed to be larger than any one of the radial length and the circumferential length of the opening surface of the engagement recess portion 18.

In this case, as shown in fig. 3, 8, and 11, the upper end surface of the support head portion 32, which is the surface facing the lower surface of the rotary bezel 11, is formed as an arc surface 32a having a large radius of curvature. Thus, the support head 32 is configured so that the arc surface 32a at the upper end portion slides in elastic contact with the lower surface as the rotation surface of the rotary bezel 11 in a point contact state without falling into the engagement recess 18.

That is, as shown in fig. 3, 8, and 11, each of the support heads 32 of the first to third support members 14 to 16 is configured such that when the arc surface 32a corresponds to the engagement recess 18, the arc surface 32a contacts the edge of the opening of the engagement recess 18 at two points, and when the arc surface 32a does not correspond to the engagement recess 18 and is separated from the engagement recess 18, the arc surface 32a contacts the lower surface of the rotary bezel 11 at one point.

However, as shown in fig. 5, the first to third support members 14 to 16 are disposed on the watch case 1 at angles larger than 90 ° in the opening angle described above. That is, the first support member 14 and the second support member 15 are disposed at an angle slightly larger than 90 °, for example, in an angle range of 95 ° to 100 °. The second support member 15 and the third support member 16 are arranged such that the opening angle thereof is about 130 °. Similarly, the first support member 14 and the third support member 16 are arranged so that the opening angle thereof is about 130 °.

As a result, the first to third support members 14 to 16 are configured to support the rotary bezel 11 in a stable state by supporting the rotary bezel 11 at three points located at each corner of a substantially isosceles triangle connecting the 1 point side, the 5 point side, and the 9 point side, and to prevent vertical movement of the rotary bezel 11 and stabilize rotation of the rotary bezel 11 even when the first and second

rotation restricting members

12 and 13 are alternately engaged with the engagement recess 18 in accordance with rotation of the rotary bezel 11, as shown in fig. 5.

Next, the operation of the rotation device 10 of the wristwatch will be described.

When assembling the rotation device 10, first, the first and second

rotation restricting members

12 and 13 are disposed in the first and

second housing holes

25 and 26 provided in the bottom of the cutout portion 9 located on the outer periphery of the upper portion of the wristwatch case 1. At this time, the first rotation restriction member 12 is disposed in the first housing hole 25 provided on the 7-point side of the wristwatch case 1, and the second rotation restriction member 13 is disposed in the second housing hole 26 provided on the 11-point side of the wristwatch case 1.

That is, when the first and second

rotation restricting members

12 and 13 are disposed in the first and second receiving holes 25 and 26 provided in the wristwatch case 1, first, the guide shafts 24 provided on the lower surfaces of the seat portions 23 of the restricting pieces 20 of the first and second

rotation restricting members

12 and 13 are inserted into the restricting springs 21, respectively, and the restricting springs 21 are disposed on the outer peripheries of the guide shafts 24, respectively.

In this state, the regulating spring 21 and the guide shaft 24 are inserted into the first and second receiving holes 25 and 26 of the wristwatch case 1 from above and are disposed in the small-diameter holes 28 of the first and second receiving holes 25 and 26, respectively. In this state, as shown in fig. 7 (a), the regulating spring 21 is extended in a natural state in a state where the lower end portion of the regulating spring 21 is in elastic contact with the bottom portions of the first and second

housing hole portions

25 and 26 and the upper end portion of the regulating spring 21 is in elastic contact with the lower surface of the base portion 23.

In this state, the upper side of the seat portion 23 projects upward from the first and second

housing hole portions

25 and 26 together with the projection portion 22, and the lower side of the seat portion 23 is disposed in the large-diameter hole portions 27 of the first and second

housing hole portions

25 and 26, respectively. Therefore, even if the protrusions 22 of the first and second

rotation restricting members

12 and 13 protrude above the first and second receiving holes 25 and 26, respectively, the lower side of the seat portion 23 is disposed in the first and second receiving holes 25 and 26, and is thereby disposed in the first and second receiving holes 25 and 26 in a stable state.

In this case, the outer shape of the base portion 23 is a non-circular shape such as an ellipse, and the inner shapes of the first and second

housing hole portions

25 and 26 are the same as the base portion 23, so that the base portion 23 is not disposed in the large diameter hole portions 27 of the first and second

housing hole portions

25 and 26 so as to rotate about the guide shafts 24. Therefore, the first and second

rotation restricting members

12 and 13 are arranged such that the restricting pieces 20 do not rotate in the first and

second housing holes

25 and 26.

At this time, the first to third support members 14 to 16 are disposed in the first to third holding holes 34 to 36 provided in the bottom of the notch 9 located on the outer periphery of the upper portion of the wristwatch case 1. At this time, the first support member 14 is disposed in the first holding hole 34 provided on the 1 o ' clock side of the wristwatch case 1, the second support member 15 is disposed in the second holding hole 35 provided on the 5 o ' clock side of the wristwatch case 1, and the third support member 16 is disposed in the third holding hole 36 provided on the 9 o ' clock side of the wristwatch case 1.

That is, when the first to third support members 14 to 16 are disposed in the first to third holding hole portions 34 to 36 provided in the wristwatch case 1, first, the guide shafts 33 provided on the lower surfaces of the support heads 32 of the support pieces 30 of the first to third support members 14 to 16 are inserted into the support springs 31, respectively, and the support springs 31 are disposed on the outer peripheries of the guide shafts 33, respectively.

In this state, the support spring 31 and the guide shaft 33 are inserted into the first to third holding hole portions 34 to 36 of the wristwatch case 1 from above and are disposed in the small diameter hole portions 38 of the first to third holding hole portions 34 to 36, respectively. In this state, as shown in fig. 8 (a), the support spring 31 is extended in a natural state in a state in which the lower end portion of the support spring 31 is in elastic contact with the bottom portions of the first to third holding hole portions 34 to 36 and the upper end portion of the support spring 31 is in elastic contact with the lower surface of the support head portion 32.

In this state, the upper side of the support head 32 protrudes upward from the first to third holding hole portions 34 to 36, and the lower side of the support head 32 is disposed in each of the large-diameter hole portions 37 of the first to third holding hole portions 34 to 36. Therefore, even if the support heads 32 of the first to third support members 14 to 16 protrude above the first to third holding holes 34 to 36, the lower portions of the support heads 32 are disposed in the first to third holding holes 34 to 36, and are thereby disposed in the first to third holding holes 34 to 36 in a stable state.

In this state, the rotary bezel 11 is attached to the upper outer periphery of the wristwatch case 1. At this time, the packing 17 is fitted in the fitting recess 11a provided on the inner peripheral surface of the rotary bezel 11 in advance. Then, the rotary bezel 11 is fitted into the notch 9 of the watch case 1 from above, and the engaging portion 11b of the rotary bezel 11 is engaged with the engaging projection 9a of the notch 9 of the watch case 1.

Thus, the rotary bezel 11 is attached to the outer periphery of the wristwatch case 1 so as to be rotatable by the notch 9 without coming off above the wristwatch case 1. At this time, the regulating pieces 20 of the first and second

rotation regulating members

12 and 13 are pressed down by the lower surface which is the rotation surface of the rotary bezel 11, and the supporting pieces 30 of the first to third supporting members 14 to 16 are pressed down by the lower surface which is the rotation surface of the rotary bezel 11.

In this case, when the regulating pieces 20 of the first and second

rotation regulating members

12 and 13 are pressed down by the lower surface of the rotary bezel 11, the regulating springs 21 of the first and second

rotation regulating members

12 and 13 are slightly compressed, and the upper portions of the seat portions 23 are respectively press-fitted into the large diameter hole portions 27 of the first and second

housing hole portions

25 and 26.

At this time, in the regulating pieces 20 of the first and second

rotation regulating members

12 and 13, the projection 22 of any one of the regulating pieces 20 is inserted into the engaging recess 18 provided in the lower surface of the rotary bezel 11, and the projection 22 of any other one of the regulating pieces 20 is pressed against the lower surface of the rotary bezel 11 without being inserted into the engaging recess 18.

When the projecting portion 22 of the regulating piece 20 is inserted into the engaging recess 18 provided on the lower surface of the rotary bezel 11, the sliding portion 22a of the projecting portion 22 faces the first inclined portion 18a of the engaging recess 18 in a parallel state with a gap therebetween, the contact portion 22b of the projecting portion 22 faces the second inclined portion 18b of the engaging recess 18 in a parallel state, and the upper end portion 22c of the projecting portion 22 contacts the bottom portion 18c of the engaging recess 18.

At this time, the height of the projection 22 of the regulating piece 20, that is, the length of the projection 22 projecting from the pedestal portion 23 toward the rotary bezel 11 is formed to be substantially the same as or slightly longer than the depth of the engaging recess 18 of the rotary bezel 11. Therefore, when the projection 22 is inserted into the engagement recess 18 and the upper end 22c thereof abuts against the bottom 18c of the engagement recess 18, the seat 23 is pressed into the first and second receiving holes 25 and 26 of the wristwatch case 1.

In this state, the respective seat portions 23 of the first and second

rotation restricting members

12 and 13 are disposed below the rotary bezel 11 with a slight gap between the upper surface thereof and the lower surface of the rotary bezel 11, and the upper surface of the seat portion 23 is disposed on a plane substantially identical to the bottom surface of the wristwatch case 1 located at the upper end portions of the first and second receiving

hole portions

25 and 26. Thus, the base parts 23 of the first and second

rotation restricting members

12 and 13 are arranged so as not to contact the lower surface of the rotary bezel 11.

At this time, the support springs 31 of the first to third support members 14 to 16 are slightly compressed, and the arc surfaces of the upper ends of the support heads 32 are pressed against the lower surface of the rotary bezel 11. That is, in this case, the support head 32 of one support piece 30 of the support pieces 30 of the first to third support members 14 to 16 corresponds to the engagement recess 18 provided on the lower surface of the rotary bezel 11, and the support head 32 of the other support piece 30 is pressed against the lower surface of the rotary bezel 11 without corresponding to the engagement recess 18.

In this way, when the support head 32 of the support piece 30 corresponds to the engagement recess 18 provided on the lower surface of the rotary bezel 11, since the upper end portion of the support head 32 is the arc surface 32a having a large radius of curvature, the arc surface abuts on the edge of the opening of the engagement recess 18 at two points in a point contact manner, and the support head 32 is pressed into the first to third holding holes 34 to 36 of the watch case 1.

When the support head 32 of the support piece 30 is separated from the engagement recess 18 of the rotary bezel 11 without corresponding to the engagement recess 18, the arc surface 32a of the upper end of the support head 32 comes into point-contact with the lower surface of the rotary bezel 11 at one point, and the support head 32 is pressed into the first to third holding holes 34 to 36 of the watch case 1.

In this state, the support pieces 30 of the first to third support members 14 to 16 support the lower surface of the rotary bezel 11 at three points. That is, as shown in fig. 5, the first to third support members 14 to 16 support the rotary bezel 11 at three points located at each corner of a substantially isosceles triangle connecting the 1-point side, the 5-point side, and the 9-point side. Therefore, the rotary bezel 11 is supported by the first to third support members 14 to 16 in a stable state, and vertical movement of the rotary bezel 11 is prevented.

Next, the operation of the rotating apparatus 10 will be described.

In this case, for example, in the regulating pieces 20 of the first and second

rotation regulating members

12 and 13, for example, the projection 22 of the regulating piece 20 of the first rotation regulating member 12 is inserted into the engaging recess 18 provided in the lower surface of the rotary bezel 11, the projection 22 of the regulating piece 20 of the second rotation regulating member 13 abuts against the lower surface of the rotary bezel 11 without corresponding to the engaging recess 18, and the rotary bezel 11 is rotatably supported by the first to third support members 14 to 15.

In this state, when the rotary bezel 11 is rotated in one direction (arrow X direction), the engagement recess 18 of the rotary bezel 11 moves in the rotation direction (arrow X direction) in accordance with the rotation of the rotary bezel 11. At this time, as shown in fig. 9, the first inclined portion 18a of the engaging concave portion 18 slides in contact with the sliding portion 22a of the projecting portion 22 of the regulating piece 20 of the first rotation regulating member 12 inserted into the engaging concave portion 18, and the sliding portion 22a is gradually pressed down against the elastic force of the regulating spring 21 in accordance with the sliding of the first inclined portion 18 a.

Therefore, as shown in fig. 9, the contact portion 22b of the protrusion 22 in the regulating piece 20 of the first rotation regulating member 12 is gradually separated from the second inclined portion 18b of the engagement concave portion 18, and the upper end portion 22c of the protrusion 22 is pushed out to the lower portion side of the engagement concave portion 18 beyond the first inclined portion 18 a. At this time, the regulating spring 21 is compressed by the pedestal portion 23, and thus the rotational force to rotate the bezel 11 becomes heavy.

In this state, when the rotary bezel 11 is further rotated in one direction (arrow X direction), the rotary bezel 11 is rotated in a state where the upper end portion 22c of the projection 22 in the regulating piece 20 of the first rotation regulating member 12 is in elastic contact with the lower surface of the rotary bezel 11 and the upper end portion 22c of the projection 22 in the regulating piece 20 of the second rotation regulating member 13 is in elastic contact with the lower surface of the rotary bezel 11.

When the rotary bezel 11 is rotated by 3 °, as shown in fig. 10, the projection 22 of the regulating piece 20 of the second rotation regulating member 13 abutting the lower surface of the rotary bezel 11 without corresponding to the engagement recess 18 among the regulating pieces 20 of the first and second

rotation regulating members

12 and 13 corresponds to the engagement recess 18. Thus, the protrusion 22 of the regulating piece 20 of the second rotation regulating member 13 is inserted into the engaging recess 18.

At this time, as shown in fig. 10, the upper end portion 22c of the protrusion 22 of the regulating piece 20 is abruptly pushed up along the second inclined portion 18b of the engaging recess 18 by the elastic force of the regulating spring 21 after the compression of the second rotation regulating member 13. Thus, the sliding portion 22a of the projection 22 of the second rotation restriction member 13 faces the first inclined portion 18a of the engagement concave portion 18, the contact portion 22b of the projection 22 faces the second inclined portion 18b of the engagement concave portion 18, and the upper end portion 22c of the projection 22 contacts the bottom portion 18c of the engagement concave portion 18.

When the projection 22 of the regulating piece 20 of the second rotation regulating member 13 is inserted into the engaging recess 18 in this way, the compressed regulating spring 21 of the second rotation regulating member 13 is expanded by its elastic restoring force, and the rotational force of the rotary bezel 11 is rapidly reduced. Therefore, the click feeling is given to the rotary bezel 11, and the rotational position of the rotary bezel 11 is restricted.

Thus, the first and second

rotation regulating members

12 and 13 regulate the position of the rotating bezel 11 every 3 ° by engaging the regulating pieces 20 of the first and second

rotation regulating members

12 and 13 with the engaging recess 18 of the rotating bezel 11 alternately every 3 ° of the rotating bezel 11. That is, even if the number of the arrangement of the engaging recesses 18 of the rotary bezel 11 is 60, the first and second

rotation restricting members

12 and 13 can position-restrict the rotary bezel 11 120 times while the rotary bezel 11 rotates one rotation.

In the rotary bezel 11, when the rotary bezel 11 is rotated in a direction opposite to the one direction (the arrow X direction) in a state where the projection 22 of the regulating piece 20 of either the first or second

rotation regulating members

12, 13 is inserted into the engaging recess 18, the second inclined portion 18b of the engaging recess 18 is brought into contact with the contact portion 22b of the projection 22, thereby preventing the rotary bezel 11 from being reversed. Therefore, the rotary bezel 11 rotates only in one direction (arrow X direction).

Thus, when the rotary bezel 11 rotates, the rotary bezel 11 is supported at three points by the first to third support members 14 to 16, and the rotary bezel 11 is supported in a stable state by the first to third support members 14 to 16. Therefore, the first and second

rotation restricting members

12 and 13 are prevented from rattling in the vertical direction of the rotary bezel 11 during the engagement and disengagement operation when engaging and disengaging with and from the engagement recess 18 of the rotary bezel 11.

As described above, according to the rotation device 10 of the wristwatch, the rotation bezel 11 as the rotation member and the first and second

rotation restricting members

12 and 13 are provided, the rotation bezel 11 is provided rotatably on the outer periphery of the wristwatch case 1 as the device main body, the engagement recesses 18 are provided at equal intervals in the circumferential direction on the lower surface as the rotation surface orthogonal to the central axis, and the first and second

rotation restricting members

12 and 13 can engage with any one of the engagement recesses 18 in a phase-shifted state to restrict the rotation position of the rotation bezel 11, whereby the rotation angle of the rotation bezel 11 can be finely restricted without increasing the number of the arrangement of the engagement recesses 18, and the wristwatch can be downsized.

That is, in the rotation device 10 of the wristwatch, since the first and second

rotation restricting members

12 and 13 can be engaged with any one of the engagement recesses 18 in a state where the phases are out of phase and can restrict the rotational position of the rotary bezel 11, when the rotary bezel 11 is rotated, the first and second

rotation restricting members

12 and 13 can be alternately engaged with any one of the engagement recesses 18 of the rotary bezel 11 and can restrict the rotational position of the rotary bezel 11.

Therefore, in the rotating device 10, since the first and second

rotation restricting members

12 and 13 can restrict the rotational position of the rotating bezel 11 by the number 2 times as many as the number of the arrangement of the engaging recesses 18 during one rotation of the rotating bezel 11, the rotation angle of the rotating bezel 11 can be finely restricted by the small number of the arrangement of the engaging recesses 18 without increasing the number of the arrangement of the engaging recesses 18.

In the rotation device 10 of the wristwatch, since the first and second

rotation restricting members

12 and 13 are disposed below the rotation bezel 11 in the central axis direction of the rotation bezel 11, even if the first and second

rotation restricting members

12 and 13 are provided, the outer diameter of the rotation bezel 11 is not increased by the first and second

rotation restricting members

12 and 13, and therefore the outer diameter of the entire rotation device 10 can be reduced, and the entire wristwatch can be downsized.

In the rotation device 10 of the wristwatch, when the first rotation restricting member 12 of the first and second restricting

members

12, 13 engages with one of the engaging recesses 18, the second rotation restricting member 13 is disengaged from the engaging recess 18, and thus when the rotary bezel 11 rotates, the first and second

rotation restricting members

12, 13 can be alternately engaged with one of the engaging recesses 18 of the rotary bezel 11.

Thus, in the rotating device 10, since the first and second

rotation restricting members

12 and 13 can restrict the rotational position of the rotating bezel 11 by the number 2 times as many as the number of the arrangement of the engaging recesses 18 during one rotation of the rotating bezel 11, the rotation angle of the rotating bezel 11 can be finely restricted by the number of the arrangement of the engaging recesses 18 being small without increasing the number of the arrangement of the engaging recesses 18.

In the wristwatch rotating device 10, the first and second

rotation restricting members

12 and 13 are disposed at a phase difference of an angle obtained by halving the interval between the adjacent engagement recesses 18, and when the first rotation restricting member 12 is engaged with any one of the engagement recesses 18, the second rotation restricting member 13 can be reliably disengaged from the engagement recess 18 without corresponding to the engagement recess 18, and thus the first and second

rotation restricting members

12 and 13 can be alternately engaged with any one of the engagement recesses 18.

In the wristwatch rotating device 10, when the first and second

rotation restricting members

12 and 13 are engaged with either one of the engagement recesses 18, the rotating bezel 11 can be rotated only in one direction, and rotation in the opposite direction can be restricted, so that the rotating bezel 11 can be rotated only in one direction, and inadvertent reverse rotation of the rotating bezel 11 can be reliably and satisfactorily prevented.

In this case, since each of the first and second

rotation restricting members

12 and 13 includes the restricting piece 20 that is detachably engaged with any one of the engaging recesses 18 of the rotary bezel 11 and the restricting spring 21 that biases the restricting piece 20 toward the rotary bezel 11, and the projecting portion 22 of the restricting piece 20 includes the sliding portion 22a that slides along the first inclined portion 18a of the engaging recess 18, the abutting portion 22b that abuts against the second inclined portion 18b of the engaging recess 18 in a facing manner, and the mountain-shaped upper end portion 22c that abuts against the bottom portion 18c of the engaging recess 18, the reverse rotation of the rotary bezel 11 can be prevented.

That is, in this rotating device 10, when the rotating bezel 11 is rotated in one direction (arrow X direction) in a state where the protruding portion 22 of the regulating piece 20 of either one of the first and second

rotation regulating members

12, 13 is inserted into either one of the engaging recesses 18, the first inclined portion 18a of the engaging recess 18 slides in a state of being in contact with the sliding portion 22a, and the abutting portion 22b is gradually separated from the second inclined portion 18b of the engaging recess 18 while gradually pressing down the sliding portion 22a against the elastic force of the regulating spring 21, and the mountain-shaped upper end portion 22c can be pushed out downward from the inside of the engaging recess 18, whereby the rotating bezel 11 can be rotated in one direction.

In this case, in this rotating device 10, when the upper end portion 22c of the protruding portion 22 passes over the second inclined portion 18b of the engaging recess 18, the base portion 23 compresses the restricting spring 21, and the rotational force of the rotating bezel 11 can be increased, and when the protruding portion 22 is inserted into the adjacent engaging recess 18, the compressed restricting spring 21 is expanded and the rotational force of the rotating bezel 11 is rapidly decreased, so that the click feeling can be given to the rotating bezel 11.

In the rotation device 10, when the rotary bezel 11 is rotated in the opposite direction to the side opposite to the one direction (the arrow X direction) in the state where the protruding portion 22 of the regulating piece 20 of any one of the first and second

rotation regulating members

12, 13 is inserted into any one of the engaging recesses 18, the abutting portion 22b of the protruding portion 22 abuts against the second inclined portion 18b of the engaging recess 18 in a state of facing thereto, whereby the rotation of the rotary bezel 11 in the opposite direction can be reliably prevented.

In the above-described embodiment, the case where the first and second

rotation restricting members

12 and 13 are provided as the rotation restricting member has been described, but the present invention is not limited to this, and for example, three or more rotation restricting members may be provided. That is, when n rotation restricting members are provided, the n rotation restricting members may be arranged so as to have a phase difference of an angle obtained by equally dividing the opening angle n, which is the interval between the adjacent engagement concave portions 18.

In this case, since the rotational position of the rotary bezel 11 can be restricted by the number n times as many as the number of the arrangement of the engaging recesses 18 while the rotary bezel 11 is rotated once by the n rotation restricting members, the rotation angle of the rotary bezel 11 can be further finely restricted by the number of the arrangement of the engaging recesses 18 which is small.

Further, the present invention is not limited to the above-described modification, and for example, when four or more rotation restricting members are provided, at least three rotation restricting members that are not associated with the engagement recess 18 and are disengaged from the engagement recess 18 may be arranged at an opening angle of 90 degrees, respectively, when any one rotation restricting member is engaged with the engagement recess 18.

In the case of such a configuration, the rotation position of the rotary bezel 11 is regulated by any one of the four or more rotation regulating members, and the rotary bezel 11 can be stably supported by any other three rotation regulating members while the functions of the first to third support members 14 to 16 are exhibited, so that the first to third support members 14 to 16 are not necessarily provided.

In the above-described embodiment, the case where the first to third support members 14 to 16 are provided as the plurality of support members has been described, but the present invention is not limited to this, and four or more support members may be provided.

In the above-described embodiment, the upper end portions of the support heads 32 in the support pieces 30 of the first to third support members 14 to 16 are formed as the arc surfaces 32a having a large radius of curvature, but the present invention is not limited thereto, and the upper end portions of the support heads 32 may be formed as flat surfaces. In this case, in order to prevent the edge of the opening of the engagement recess 18 from being caught, a chamfered portion may be provided on the outer periphery of the flat surface of the support head 32.

In the above-described embodiment, as the plurality of support members, the first to third support members 14 to 16 are configured such that, as shown in fig. 11, when the arc surface 32a corresponds to the engagement recess 18 of the rotary bezel 11, the arc surface 32a contacts the edge of the opening of the engagement recess 18 at two points, and when the arc surface 32a does not correspond to the engagement recess 18 and is separated from the engagement recess 18, the arc surface 32a contacts the lower surface of the rotary bezel 11 at one point, but may be configured such that, depending on the state when the first and second

rotation restricting members

12 and 13 are respectively engaged with and separated from the engagement recess 18 of the rotary bezel 11, the arc surfaces 32a of the first to third support members 14 to 16 correspond to and are not associated with and are separated from the engagement recess 18.

As shown in fig. 9, when the first rotation restricting member 12 is engaged with the engaging recess 18 of the rotary bezel 11, the first support member 14 located at the opposed position as shown in fig. 5 is configured such that the arc surface 32a corresponds to the engaging recess 18 of the rotary bezel 11 and the arc surface 32a contacts the edge of the opening portion of the engaging recess 18 at two points, and as shown in fig. 9, when the second rotation restricting member 13 is disengaged from the engaging recess 18 of the rotary bezel 11, the second support member 15 located at the opposed position as shown in fig. 5 is configured such that the arc surface 32a is disengaged from the engaging recess 18 without corresponding to the engaging recess 18 of the rotary bezel 11 and the arc surface 32a contacts the lower surface of the rotary bezel 11 at one point, and the third support member 16 is in the same state as the first support member 14 or the second support member 15.

The same applies to the case shown in fig. 10. That is, when the rotation restricting member is engaged with the engaging recess 18 of the rotary bezel 11, the support member also corresponds to the engaging recess 18, and when the rotation restricting member is disengaged from the engaging recess 18 of the rotary bezel 11, the support member is not caused to correspond to the engaging recess 18 and is disengaged from the engaging recess 18, so that the vertical movement of the rotary bezel 11 can be prevented more reliably and satisfactorily, and the rotation of the rotary bezel 11 can be stabilized.

In the above-described embodiment, the rotation restricting member is provided so that the rotation bezel 11 can be rotated only in one direction and the rotation in the opposite direction can be restricted when the first and second

rotation restricting members

12 and 13 are engaged with the engagement recess 18 of the rotation bezel 11, but is not limited to this, and for example, the engagement recess 18 of the rotation bezel 11 may be provided with inclined portions of the same angle, the projection portions 22 of the first and second

rotation restricting members

12 and 13 may be formed in a shape corresponding to the inclined portions of the engagement recess 18 so that the rotation in the opposite direction is not restricted, and the engagement recess 18 of the rotation bezel 11 may be formed in a circular shape and the projection portions 22 may be formed in a corresponding circular shape, spherical shape, or the like so that the rotation in the opposite direction is not restricted.

In the above-described embodiments and modifications thereof, the case of applying the present invention to a wristwatch has been described, but the present invention is not necessarily limited to a wristwatch and can be applied to various timepieces such as a travel watch, an alarm clock, a desk clock, and a wall clock.

While the embodiments of the present invention have been described above, the present invention is not limited thereto, and includes the inventions described in the claims and their equivalents.

Claims

1. A watch is characterized in that a watch body is provided with a watch body,

the disclosed device is provided with:

a rotating member which is rotatably provided around the display unit displaying the time, and which has engaging recesses provided at equal intervals in a circumferential direction on a rotating surface orthogonal to the central axis; and

a pair of regulating members which are capable of engaging with any one of the engaging recesses in a state of being out of phase with each other to regulate a rotational position of the rotating member,

the pair of regulating members are provided at positions shifted to one side in the lateral direction when the display unit is viewed from the front.

2. The watch of claim 1,

a first restricting member of the pair of restricting members is provided at a position shifted to one side in a longitudinal direction in a front view of the display unit,

the other of the pair of regulating members is provided at a position shifted to the other side in the longitudinal direction.

3. A wristwatch provided with a display portion for displaying time and a band attaching portion at a side portion on a 6 o 'clock side and a side portion on a 12 o' clock side,

the disclosed device is provided with:

a rotating member rotatably provided around the display unit and having engaging recesses provided at equal intervals in a circumferential direction on a rotating surface orthogonal to the central axis; and

the pair of restricting members are provided at positions shifted to the 9 o ' clock side out of the 3 o ' clock side and the 9 o ' clock side around the display portion,

one of the pair of regulating members is provided at a position shifted to 6 point side out of 6 point side and 12 point side around the display portion,

the other of the pair of regulating members is provided at a position shifted to 12 out of 6 and 12 around the display portion.

4. The watch according to any one of claims 1 to 3,

when one of the pair of regulating members is engaged with one of the engaging recessed portions, the other of the pair of regulating members is disengaged from both of the engaging recessed portions.