JPH0720629Y2 - Rotating bezel device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rotary bezel device for a portable timepiece, and more particularly to a rotary bezel device of stable quality for use in a submersible watch or the like.

[Prior Art] In a conventional one-way rotating bezel device, as shown in FIG. 4, only a vertical elasticity of a leaf spring 13 provided between a rotating bezel 12 and a body 11 provides a rotating torque and a click feeling. It was a composition. With this configuration, rattling in the radial direction of the rotating bezel and unevenness of the rotating torque are likely to occur, so that a device with a high precision cannot be obtained.

[Problems to be solved by the device]

The present invention eliminates the radial rattling of the rotating bezel, which is a problem in the conventional rotating bezel device as described above, and eliminates the unevenness of the rotating torque, improves the operability of the rotating bezel, and prevents the reverse rotation. It is an object of the present invention to obtain a rotating bezel device having a high sense of precision with high safety and reliability by improving.

[Means for Solving the Problems]

The rotating bezel device of the present invention includes a glass fixing ring screwed with an outer peripheral portion of an upper end of a body member, a rotating bezel rotatably attached to the glass fixing ring, and the glass fixing ring and the rotating bezel. The rotary bezel packing is provided between the groove formed in the peripheral portion and has a radial interference, and the leaf spring engages with the click groove provided in the bottom surface of the rotary bezel. The click groove has a stopper surface formed in a direction perpendicular to the rotation direction of the rotary bezel, and the click groove starts from the inner peripheral end of the bottom surface of the rotary bezel and does not reach the outer peripheral end of the leaf spring. Includes a bent portion which engages with the click groove and a foot portion which is positioned and attached to a hole of a groove portion provided on an outer peripheral portion of the body member, and the body member and the glass fixing member. The rotating bezel is sandwiched between the bottom portions of the ring, the tip of the bent portion contacts the stopper surface, the rotating bezel does not reverse, and the leaf spring is invisible by the rotating bezel. It is characterized in that it is engaged and attached to a biting portion formed on the outer peripheral portion of the ring.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a watch case, which is made of stainless steel or titanicum and has a high strength through a glass packing 7 on an inner diameter step portion 1a. The inorganic glass 6 is attached. Reference numeral 5 is a glass fixing ring made of stainless steel or titanicum, which is engaged with the threaded portion of the body and is firmly fixed to the body by the upper wrench groove 5a.

2 is a rotary bezel with a display plate 8 fixed by caulking, and is made of stainless steel or titanicum,
The protrusion 2d formed on the bottom of the inner peripheral portion is engaged with and attached to the biting portion 5b formed on the outer peripheral portion of the glass fixing ring 5. 2a is divided into 60 on the bottom of the rotating bezel or
The click groove is divided into 120 sections and has a rectangular or right-angled triangular cross section, and has a stopper surface 2c perpendicular to the rotation direction (direction of arrow A).

Reference numeral 3 is a leaf spring, and a bent portion 3a is formed at an end thereof. The bent portion 3a is easily disengaged from the click groove 2a when rotating the rotating bezel 2 in the direction of arrow A, and is rotated in the opposite direction. The front end of the shaft is engaged with the click groove 2a so that the rotary bezel 2 does not reversely rotate due to being caught on the stopper surface 2c. A foot portion 3b is formed on a part of the leaf spring 3 by bending, and the foot portion 3b is engaged with a hole 1b of a groove portion formed on the body 1 to perform positioning in the rotational direction. FIG. 3 shows a sketch of the leaf spring 3. The inner protrusion 3c of the leaf spring 3 is sandwiched and fixed between the body 1 and the glass fixing ring 5.

Further, as shown in FIG. 1, since the click groove formed on the bottom surface of the rotating bezel starts from the inner peripheral end of the bottom surface of the rotating bezel and does not reach the outer peripheral side wall, the click groove may be exposed to the outside. Absent. Therefore, in addition to increasing the degree of freedom in design, foreign matter or the like does not enter the click groove from the outside, and the operational reliability of the rotating bezel can be dramatically improved.

4 is a rotating bezel packing, which is made of NBR (nitrile butadiene rubber) containing about 10% of DOS (deoctyl sebagate) self-lubricating agent, and is attached to the inner peripheral groove 2b of the rotating bezel 2 and the body 1 It is provided with a tight margin in the radial direction between the glass fixing ring 5 and the glass fixing ring 5. It is preferable that the squeezing margin in the radial direction is 5 to 25% in terms of the crushing rate in order to improve the operability of rotation and prevent inadvertent movement such as rattling.

[Effect of device]

As described above, according to the present invention, since the rotating bezel packing having the interference is disposed between the rotating bezel and the glass fixing ring, the rotating bezel smoothly rotates, so that the operability is improved and the rotating bezel is improved. The rotation selection position becomes accurate, and a high degree of precision can be obtained. Further, when a force that reversely rotates the rotating bezel is applied to the rotating bezel, the bent portion of the leaf spring engages with the stopper surface formed on the bottom surface of the rotating bezel in a direction perpendicular to the rotation direction. In addition to simply preventing reverse rotation, the tip of the bent part goes deeper into the click groove even when trying to force reverse rotation, so the reverse rotation of the rotating bezel is reliably prevented in any case. Thus, high safety and reliability can be ensured. In addition, since the leaf spring has a configuration in which the bent portion and the foot portion are integrally formed, it has a great effect on cost reduction and improvement of workability of the leaf spring.

Also, the click groove formed on the bottom surface of the rotating bezel has a structure that does not penetrate from the inner peripheral portion to the outer peripheral portion and leaves the outer peripheral wall, so the leaf spring is not visible from the side and the degree of freedom in design is high. Since the bezel can be achieved and the click groove is not exposed to the outer periphery, dust and foreign matter enter the click groove, and the function of the rotating bezel is not impaired, and the rotating bezel device has high reliability. Can be achieved.

Further, the leaf spring is integrally formed with a bent portion that engages with the click groove and a foot portion that is positioned and attached to the hole of the groove portion provided on the outer peripheral portion of the body member, and the bottom portion of the body member and the glass fixing ring is formed. Due to the sandwiched structure, the leaf spring is positioned in the circumferential direction by the foot, and the positioning in the longitudinal section is securely performed between the body member and the bottom portion of the glass fixing ring. And, there is no play in the vertical direction of the vertical cross section, stable engagement with the click groove of the rotating bezel is possible, and the torque when the bezel rotates is also stable, and it is possible to provide a rotating bezel device with a very good click feeling. At the same time, the rotating bezel has a structure that engages with the biting portion formed on the glass fixing ring, so that when forming the biting portion, a circular glass fixing ring is used instead of the barrel having a complicated shape. To form the, those working a lathe or the like is easy to manufacturing cost can be reduced.

Also, even if the rotating bezel is shocked during use and the bite part is damaged, it is not a big thing to replace the barrel and take out the internal movement, just replace the glass fixing ring and it can be easily repaired. The workability in after-sales service is improved, and the repair cost can be reduced.

Furthermore, in terms of size, it can be implemented with the same size as the conventional example,
Since the number of parts is small, it is possible to obtain a rotary bezel device that is inexpensive and highly effective.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view of the rotary bezel device of the present invention. FIG. 2 is a partial sectional view of the leaf spring engaging portion of the present invention. FIG. 3 is a sketch drawing showing an embodiment of a leaf spring. FIG. 4 is a vertical sectional view showing an example of a conventional structure. 1,11 …… Body 2,12 …… Rotating bezel 2a …… Click groove 2c …… Stopper face 2d …… Projection part 3,13 …… Leaf spring 3a …… Bent part 4 …… Rotary bezel packing 5 …… Glass Fixing ring 5b …… Part with bite

Claims (1)

[Scope of utility model registration request] 1. A glass fixing ring screwed with an outer peripheral portion of an upper end of a body member, a rotating bezel rotatably attached to the glass fixing ring, and an inner peripheral portion of the glass fixing ring and the rotating bezel. A rotary bezel packing which is provided between the groove formed and has a tightening margin in the radial direction, and a leaf spring which engages with a click groove provided on the bottom surface of the rotary bezel. The groove has a stopper surface formed in a direction perpendicular to the rotation direction of the rotating bezel, and the click groove starts from an inner peripheral edge of the bottom surface of the rotating bezel and does not reach an outer peripheral edge of the rotary bezel. A bent portion that engages with the groove and a foot portion that is positioned and attached to the hole of the groove portion provided on the outer peripheral portion of the body member are integrally formed, and the body member and the bottom of the glass fixing ring are formed. The rotary bezel is sandwiched in between, the tip of the bent portion contacts the stopper surface, the rotary bezel does not reverse, and the leaf spring is invisible by the rotary bezel. A rotary bezel device, characterized in that the rotary bezel device is engaged with and attached to a biting portion formed on the.