JPH02243928A - Structure of register ring - Google Patents

Abstract

PURPOSE:To improve the operability and stability by providing the click part and fixation part of a click spring between both ends of a drum. CONSTITUTION:A circumferential projection 3 is formed on the outer wall 1a of the periphery of a display opening part for time which is formed on the drum 1 of a timepiece case and projections 2a formed inside and outside the register ring 2 are engaged with the projection 3 to secure a gap between the external wall 1a which has the projection and the internal wall 2b of the ring 2. Further, ratchet grooves 5 are formed in the internal wall 2b of the ring 2 facing the external wall 1a and the click spring 4 whose plane shape is curved is provided in the gap along the inner peripheries of the grooves 5; and a click part 4a for reversing prevention is provided at the other end part of the spring 4 while pressed elastically against the grooves 5 and the ring 2 is made rotatable. Further, while the ring 2 is engaged with the projection 3 of the drum 1, fixation ends 4b formed between both ends of the spring 4 are engaged with the hole 1b of the drum 1 and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a register ring for a timepiece.

[Conventional technology]

As prior art related to the present invention, Swiss Patent No. 503
There is a publication No. 305. This patent discloses, as shown in FIGS. 8 and 9, a body 21 on which a rotating bezel 22 is installed, and a block member 24 between the two parts 21 and 220 that allows the rotating bezel 22 to rotate only in one direction. In a watch case consisting of a watch case, the guidance of the rotating bezel 22 around said side 21 is achieved by an elastic wire 26 arranged between the rotating bezel 22 and the two rotating cylindrical surfaces belonging to each of the barrels 21; The elastic wires 2'6 are arranged so as to contact each of said surfaces alternately at divided points around the circumference of the body 21.

Furthermore, the block member 24 is connected to the side 21 and the rotating bezel 2.
2, and surrounds the trunk 210 at an angle of 180° or more.

One end of the stretched block member 24 is fixed to a fixed portion 26 of the body 21, and a locking portion 28 at the other end is locked to a notch 27 on the inner circumference of the lower surface of the rotating bezel 22. .

[Problem to be solved by the invention]

In the prior art, as shown in FIGS. 8 and 9, a body 21 on which a rotating bezel 22 is attached and the two parts 21
．． 22, and a block member 24 that allows the rotating bezel 22 to rotate only in one direction,
In FIG. 9, the structure is such that the locking portion 28 of the block member 24 prevents reverse rotation, but since the notch 27 is an arc less than a semicircle, the locking portion 28 of the block member 24 is located there. When engaged, the contact area is small and it is not possible to sufficiently prevent reverse rotation. Furthermore, since the depth of the notch 27 in the contact portion of the locking portion 28 is shallow, the locking portion 28 may come off or come loose, and this shape is quite unreasonable from a structural point of view.

Furthermore, if the arc is made larger than a semicircle, the locking part 28 will be too deep (caught) during rotation due to the circular arc, resulting in poor rotational performance, and if the diameter of the arc is increased, the current rotation The number of threads is smaller than the number of threads of the bezel 22, which is 60, and the bezel is no longer practical as a rotating bezel.

Further, since the locking portion 28 and the fixing portion 26 of the block member 24 are disposed at both ends of the body 21 at an angle of 180 degrees or more, the locking portion 28 of the block member 24 and the rotating bezel 22
The block member 24 is guided to the inner wall of the rotating bezel 22 by the rotation preventing stress when it is locked with the notch 27, and the behavior of the block member 24 causes the block member 24 to follow the inner wall of the rotating bezel 22. The resulting gap causes play in the rotating bezel 22 in the reverse rotation direction.

For this reason, it is ideal to set the above-mentioned gap as small as possible, but in FIG. Since the gap is set between the block member 24 and the body 21 around the entire circumference, a lot of backlash occurs, which significantly impairs the operability and stability of the rotating bezel 22. 22 as a register ring, there was a fatal problem of deterioration of click position accuracy and occurrence of bank crash.

An object of the present invention is to solve the above-mentioned problems and provide a structure of a thin and small register ring for a timepiece, which improves the operability of the rotary ring and the stability of click position accuracy.

[Means to solve the problem]

The structure of the present invention is such that a register ring is rotatably attached to the outer periphery of the upper surface of the cylinder, a ratchet groove for positioning is provided inside the register ring, and a click that engages with the ratchet groove is provided between the register ring and the cylinder. In the structure of a register ring in which a spring is arranged, the click spring having a curved planar shape has at least one click part and a fixed end for fixing to the barrel between both ends. , the click portion is engaged with the ratchet groove.

Further, in order to eliminate backlash in the vertical direction rather than in the rotational direction of the register ring, a plurality of convex portions and/or concave portions may be formed on the upper surface and/or lower surface between both ends of the click spring.

Furthermore, in order to prevent interference between the non-click end of the click spring and the teeth of the register ring, one end of the click spring is bent toward the center or the outside of one end is chamfered to improve rotation. It can also be improved.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a sectional view of a main part of the register ring portion, FIG. 2 is a cross-sectional view of the register ring portion, and FIGS. 3 to 7 are perspective views of the click spring.

A circumferential protrusion 6 is formed on the outer wall 1a around the time display opening formed in the body 1 of the watch case, and a protrusion 2a formed on the inside of the register ring 2 is engaged with the circumferential protrusion B. , a gap is ensured between the outer wall 1a having the circumferential protrusion 6 and the inner wall 2b of the register ring 2. A plurality of groove grooves 5 are formed on the inner wall 2b of the register ring 2 facing the outer wall 1a, and a click spring 4 having a curved planar shape is arranged in the gap along the inner periphery of the ratchet groove 5. , and a click part 4a for preventing reverse rotation is elastically installed in the ratchet groove 5 at the other end of the click spring 4, so that the register ring 2 can be rotated with appropriate moderation, and furthermore, the register ring 2 is connected to the barrel 1. At the same time, the fixed end 4b formed between both ends of the click spring 40 is engaged with the hole 1b of the body 1 and fixed. Incidentally, reference numeral 4e denotes a bent portion in which one end of the click spring 4 is bent toward the center in order to prevent the one end of the click spring 4 from engaging with the ratchet groove 5 of the register ring 2.

Next, FIGS. 3 to 7 show various click springs used in the register ring structure of the present invention.

Fig. 3 shows a click spring 4 in which a click part 4a for preventing reverse rotation is provided at the other end, and a second clink part 4f is provided at one end of the click spring 4, which not only prevents reverse rotation but also suppresses backlash. You can get a click feeling. still,
4b is a fixed end.

FIG. 4 shows two convex portions 4c on the top surface of the click spring 4.
A concave portion 4d is formed at opposing locations on the lower surface to eliminate the vertical play of the register ring 2.By using this click spring 4, even if the machining accuracy of the barrel 1 and register ring 2 is worse than usual, the register can be adjusted. ring 2
There is no vertical play. Note that 4a is a click portion provided at the other end of the click spring 4 to prevent reverse rotation, and 4e is a bent portion provided at one end of the click spring 4.

In FIG. 5, a click part 4a for preventing reverse rotation is provided at the other end of the click spring 40, and a chamfered part 4g is provided on the outside of the -i part. In addition, the chamfered part 4g is the click spring 4.
This is to prevent one end of the register ring 2 from engaging with the ratchet groove 5 of the register ring 2.

In FIG. 6, the click spring 4 is provided with a click portion 4a for both rotations at the other end and a bent portion 4C at one end.

In Fig. 7, two click parts are provided between the other end of the click spring 4 and the fixed end 4b, with a click part 4a for preventing reverse rotation at the other end and a second click near the other end. Part 4 “
are formed respectively. By using this click spring 4, there is almost no backlash in the register ring.

[Effects of the Invention] As is clear from the above description, according to the present invention, the click part and the fixing part of the click spring are disposed at both ends of the circumference of the body at 180° or more (and between the two ends). Since the click spring is located in the
The alignment accuracy when clicking the register ring has been improved, and there are fewer panclasos/yus.

Furthermore, since the fixed end of the click spring corresponds to the fulcrum of the lever, even if the click spring is thin or thin, it can always supply the necessary spring force to the click part at the tip.
In addition to stabilizing the rotation of the register ring, it also allows the register ring to be made thinner and smaller, and has a significant effect on the design appearance.

Further, by making the ratchet groove of the register ring into a saw tooth, it becomes possible to reliably prevent reverse rotation, which has the effect of improving the operability and stability of the horizontal ratchet structure.

[Brief explanation of drawings]

1 to 7 show examples of the present invention, in which FIG. 1 is a cross-sectional view of the main part of the register ring section, FIG. 2 is a cross-sectional view of the register ring section, and FIG. 3 to 7 are click springs. , and FIGS. 8 and 9 are conventional examples. FIG. 8 is a sectional view of a main part of the rotating bezel portion, and FIG. 9 is a partially enlarged sectional view of the rotating bezel portion. 1... Body, 1a... Outer wall, 1b...
...Hole, 2...Register ring, 2a...
...Protrusion, 2b...Inner wall, 6...Circumferential projection, 4...Click spring, 4a...
・Click part, 4b...Fixed end, 4c...
...Convex portion, 4d...Concave portion, 4e...Bending portion, 4r...Second click portion, 4g...
... Chamfered portion, 5... Ratchet groove. Figure Figure

Claims (3)

[Claims] (1) A register ring is rotatably attached to the outer periphery of the upper surface of the cylinder, a ratchet groove for positioning is provided on the inner wall of the register ring, and a click spring that engages with the ratchet groove is arranged between the register ring and the cylinder. In the structure of the register ring provided, the click spring having a curved planar shape has at least one click portion and a fixed end for fixing to the barrel between both ends, and the fixed end is fixed to the barrel. A structure of a register ring, characterized in that the register ring is fixed to the barrel and the click part is engaged with the ratchet groove. (2) The register ring structure according to claim 1, wherein a plurality of convex portions and/or concave portions are formed on the upper surface and/or lower surface between both ends of the click spring. (3) The register ring structure according to claim 1 or 2, wherein one end of the click spring is bent toward the center or the outside of the one end is chamfered.