JPH0731251B2 - Reverse rotation prevention structure for rotating ring for watch - Google Patents

Description

The present invention relates to a reverse rotation preventing structure for a timepiece rotating ring.

[Conventional technology]

Prior art relating to the present invention includes Swiss Patent No. 503305.
There is an issue. In this patent, as shown in FIGS. 8 and 9, a body 21 having a rotating bezel 22 mounted thereon, and a block member 24 between the two parts 21 and 22 for preventing the rotating bezel 22 from rotating only one side. In the watch case consisting of, the guiding of the rotating bezel 22 around the body 21 is performed by an elastic wire arranged between the rotating bezel 22 and two rotating cylindrical surfaces belonging to each of the body 21.
23, the elastic line 23 of which is arranged so as to alternately contact each of said faces at points divided around the circumference of the barrel 21. Further, the block member 24 is
21 and the rotating bezel 22 are extendedly arranged and
Block member 2 around the body 21 of 180 ° or more
4, the stretched block member 24 acts on a part of the case by a fixing portion 26 at one end, even if a locking portion 28 at the other end acts on a notch 27 formed in the inner wall of the rotating bezel 22. But I'm stuck.

[Problems to be Solved by the Invention]

In the prior art, as shown in FIGS. 8 and 9, a body 21 having a rotating bezel 22 mounted thereon and the two parts 21, 22 are provided.
The block member 24 is arranged so as to extend between the case parts 21 and 22, although the watch case is composed of a block member 24 in which the rotating bezel 22 is prevented from rotating only one side. The behavior of the block member 24 will be described in detail. As shown in FIG. 10, when the block member 24 is rotated from the fixed portion 26 toward the tip of the block member 24 (direction of arrow f), the block member 24 has an inner body. Guided by 21, the rotating bezel 22 can be moved with an appropriate click feeling. Further, as shown in FIG. 11, when the rotating bezel 22 is rotated from the tip of the block member 24 toward the fixed portion 26 (direction of arrow f), the locking portion 28 at the tip of the block member 24 is It is locked in the notch 27 to prevent the rotation of the rotary bezel 22. The locking portion 28 and the fixed portion 26 of the block member 24 are arranged around the body 21 at both ends of 180 ° or more. Therefore, the block member 24 has an action of guiding the block member 24 to the inner wall of the rotating bezel 22 by the rotation blocking stress when the block member 24 is locked, and comparing the behavior of the block member 24 in FIGS. 10 and 11. As is also clear, the gap generated by the block member 24 along the inner wall of the rotating bezel 22 generates gas in the rotating bezel 22 when it is rotated in the reverse direction, which significantly improves the operability and stability of the rotating ring 22. There were problems such as damage. An object of the present invention is to solve the above problems and prevent reverse rotation of the rotating bezel.

[Means for Solving the Problems]

According to the configuration of the present invention, the rotary ring is attached to the circumferential projection formed on the outer wall around the time display opening of the case body of the watch case, and a gap is secured between the circumferential projection and the inner wall of the rotary ring. Then, a plurality of notches are formed in the inner wall of the rotating ring facing the circumferential projection, the tip is elastically abutted against the inner wall, and the other end is fixed to the outer edge of the circumferential projection. The spring is arranged in the gap, and when the rotating ring is rotated from the fixed end of the spring toward the tip of the spring, the spring is elastically deformed toward the circumferential projection of the body to engage the tip and the notch of the spring. When the rotating ring is disengaged and rotated from the tip of the spring toward the fixed end, the tip of the spring is locked in the notch, and the rotation of the rotating ring is prevented. A reverse rotation preventing portion is formed near the tip of the spring, and Certain engagement portion reverse rotation prevention portion of locking in to the formation of the body of the watch case.

Then, the fixed end of the spring is released from the barrel to make it a free end, and the inner diameter of the spring is made larger than the outer diameter of the outer wall of the barrel.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 6 show an embodiment of the present invention. FIG. 1 is a sectional view of an essential part, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a perspective view of a leaf spring. FIG. 4 is a perspective view of the body, and FIGS. 5 and 6 are partially enlarged plan views showing the behavior of the leaf spring. A circumferential projection 3 is formed on the outer wall around the time display opening formed on the body 1 of the watch case, and the rotary ring 2 is formed on the circumferential projection 3.
The projection 2a formed on the inner side of the
A gap is secured between the outer wall 1a having the above and the inner wall 2b of the rotating ring 2. The inner wall of the rotating ring 2 facing the outer wall 1a
A plurality of notches 7 are formed in 2b, and a notch concave portion capable of engaging the reverse rotation preventing portion 5 with a part of the circumferential projection 3
Form 3a. As shown in FIG. 3, the tip 4d of the leaf spring 4 is
A reverse rotation preventing portion 5 that protrudes directly above from the body of the leaf spring 4 is formed in the vicinity of the reverse rotation preventing portion 5 and the reverse rotation preventing portion 5 is formed in the cut recess.
3a is engaged. A C ring-shaped leaf spring 4 is arranged in the gap so that the tip 4a elastically abuts the notch 7 of the inner wall, and the opposite end of the tip 4a, that is, the fixed end 4b is welded to the outer wall 1a of the body. Secure with caulking. As shown in FIG. 5, when the rotating ring 2 is rotated from the fixed end 4b of the leaf spring 4 toward the tip 4a of the leaf spring 4 (direction F in the arrow direction), the leaf spring 4 has a circumferential projection 3 End of the leaf spring 4 by elastically deforming to the side 4a
Disengage from the notch 7. At this time, since the entire circumference of the leaf spring 4 is used for deformation, the click feeling of the tip 4a and the notch 7 becomes light. Next, as shown in FIG. 6, when the rotary ring 2 is rotated from the tip 4a of the leaf spring 4 toward the fixed end 4b (direction of arrow F), the tip 4a of the leaf spring 4 is rotated.
Is locked so as to hit the notch 7. At this time, since the reverse rotation preventing portion 5 is formed in the vicinity of the tip 4a of the leaf spring 4, when the tip 4a is strongly pushed by the notch 7 of the rotary ring 2, the reverse rotation of the leaf spring 4 is reversed. Since the prevention portion 5 is firmly held in the notch concave portion 3a of the body, it is possible to quickly prevent the rotation of the rotating ring 2, and until the entire leaf spring spreads to the inner wall of the rotating bezel as in the conventional case, Does not continue to rotate, and the blocking feeling becomes good. FIG. 7 shows a second embodiment of the present invention, in which a concave portion 8 is formed in a part of the outer edge of the circumferential projection formed on the body, and the concave portion 8 has a C-ring shape having a circular cross section. In the vicinity of the spring 9, a reverse rotation preventing portion 10 which is partially folded back is formed, and the reverse rotation preventing portion 10 is engaged with the recess 8. Also, the tip 13 of the spring 9
The opposite end is released from the barrel to make it a free end, and the inner diameter of the C-ring spring is made larger than the outer diameter of the outer wall 14 of the barrel. When the rotating ring 11 is rotated from the free end 12 of the spring 9 toward the tip 13 of the spring 9 (direction of arrow F1), the spring 9 is elastically deformed toward the circumferential protrusion with the point A as a fulcrum. By exerting more elastic force, the tip 13 of the spring 9 and the notch 15 are disengaged, and the rotating ring 11 can be rotated.
When the rotating ring 11 is rotated from the tip 13 of the spring 9 toward the free end 12 (direction of arrow F2), the spring 9 abuts at the point B of the recess 8, so that the deformation range of the spring is reduced. The tip 13 of the spring 9 is locked in the notch 14, and the rotation of the rotary ring 11 can be prevented.

In addition to the example in which the notch concave portion of the first embodiment or the concave portion of the second embodiment is formed in the case member on the watch case, various ideas can be considered according to the shape of the reverse rotation preventing portion of the spring. Further, the shape of the spring may be substantially the same as the outer diameter of the outer wall of the body, but in the case of the second embodiment, it is preferably larger than the outer diameter of the outer wall of the body. Further, the means for fixing the rotary ring to the body may be different means from the first and second embodiments.

〔The invention's effect〕

As is clear from the above description, according to the present invention, the reverse rotation preventing portion is provided in the vicinity of the tip of the spring, so that when the rotating ring is rotated from the tip of the spring toward the fixed end, the tip of the spring is Is locked in the notch, and the backlash when the rotation of the rotary ring is prevented is reduced, so that the operability and safety can be improved. Further, if the end opposite to the tip of the spring is made free, the load for fixing the spring to the body can be eliminated.

[Brief description of drawings]

1 to 6 relate to the present invention, FIG. 1 is a sectional view of a main part of a rotating ring structure showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a perspective view of a leaf spring, FIG. 4 is a perspective view of a main portion of a body, FIGS. 5 and 6 are partially enlarged plan views showing the behavior of the leaf spring, and FIG. 7 is a second embodiment of the present invention. 8 to 11 are conventional examples, FIG. 8 is a sectional view of a main part of the rotating bezel structure, and FIG. 9 is a partially enlarged sectional view of the rotating bezel structure. Figure 10 and
FIG. 11 is a sectional view showing the behavior of the block member. 1 ... Body, 2, 11 ... Rotation ring, 3 ... Circular protrusion, 4 ... Leaf spring, 4a, 13 ... Tip, 4b ... Fixed end, 5, 10 ... Reverse rotation prevention part, 7 , 14 …… notches, 8 …… recesses, 9 …… springs, 12 …… free ends.

Claims (2)

[Claims] 1. A rotary ring is attached to a circumferential projection formed on an outer wall around a time display opening of a watch case body, and a gap is secured between the circumferential projection and an inner wall of the rotary ring. ,
A C-ring shape in which a plurality of notches are formed on the inner wall of the rotating ring facing the circumferential protrusion, the tip is elastically abutted to the notch, and the other end is fixed to the outer edge of the circumferential protrusion. When the rotation ring is rotated from the fixed end of the spring toward the tip of the spring, the spring is elastically deformed toward the circumferential protrusion of the body to engage the notch of the spring with the notch. When the rotating ring is rotated from the tip of the spring toward the fixed end, the tip of the spring is locked in the notch, and the rotation of the rotating ring is prevented. A reverse rotation preventing portion is formed in the vicinity of the tip of the spring, and an engaging portion for locking the reverse rotation preventing portion of the spring is formed on the body of the timepiece case. Anti-rotation structure. 2. The timepiece according to claim 1, wherein the fixed end of the spring fixed to the case is released to make it a free end, and the inner diameter of the spring is made larger than the outer diameter of the outer wall of the case. Reverse rotation prevention structure for the rotating ring.