JPS5920702Y2 - Operating devices such as watches - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an operating device for a watch or the like used for operations such as setting hands.

In conventional watch operating devices, particularly in scale adjustment devices, the adjustment shaft is prevented from reversing by meshing ratchet teeth with a ratchet spring.

This device has many problems, including the large number of parts, requiring a large design space, and the need to set the ratchet spring pressure.

Furthermore, in the improved operating device, as shown in FIG. The arm 8a extending from the main plate 1
It was locked in a through hole 10a drilled in the hole 10a.

With this device, when the operating knob 4 rotates forward, the transmission wheel 6
Since the coil spring 8 inserted into the transmission wheel 8 acts to enlarge the hole diameter of the coil spring 8 by the bending moment caused by rotation, the coil spring 8 does not affect the transmission wheel 6 and the rotation is performed normally.

When the operating knob 4 rotates in the reverse direction, the coil spring 8 acts to reduce the hole diameter of the coil spring 8 due to the bending moment caused by rotation, so the coil spring 8 or the floating wheel 6 is held elastically, and the frictional force thereof prevents reverse rotation. It was configured so that it could be done.

However, with this improved device, it was not possible to eliminate the deformation of the coil spring due to the application of a large force at the time of reversal, or the possibility of the coil spring coming off the locking portion, which was a major problem.

The present invention solves the above-mentioned conventional problems, and its purpose is to provide an operating device such as a watch that can prevent reversal even in the face of strong reversing force, has a simple structure, and has a small number of parts. It is in.

In order to achieve the above object, the present invention has a pipe shaft,
The pipe shaft is divided into arc-shaped parts by an axial cut, and a snap-fit claw is provided at the end of the shaft, and a finger locking part is formed on the operating surface so that the pipe shaft can be rotated when pressed by the finger. The pipe shaft is supported via an elastic pressing means between an operating knob having a reverse prevention claw that projects in the axial direction formed on the back surface and the snap fit claw, and is engaged with the reverse rotation preventing claw of the operating knob. and a member provided with a reversal prevention pawl, and when the operation knob attempts to reverse, the reversal prevention pawl of the operation knob and the reversal prevention pawl of the member engage, preventing the operation knob from reversing, such as a watch. Features a device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 shows a first embodiment of the invention.

The timepiece wheel train is rotatably supported by an upper plate 22 and a lower plate 24.

In the figure, 26 is a second hand wheel, 28 is a minute wheel, 30 is an hour wheel, 32 is a reference wheel, and the hour hand wheel 30 has a reference hour wheel 34.
are in mesh with each other, and a reference setting wheel 36 is in mesh with the reference wheel 32.

Here, the guide setting wheel 36 is fixed to a guide operating shaft 38, and the guide clock 34 is loosely fitted onto the guide operating shaft 38.

Further, a transmission wheel 40 is fixed to the reference operating shaft 38 and meshes with a reference operating knob 42 having a gear formed on the outer periphery.

The guide operation knob 42 has a gear formed on its outer periphery to prevent slipping, and has a knurling on its outer surface to form a finger engagement part.

From this, the operating force of the operating knob 42 is approximately the same as that of the transmission wheel 4.
It is transmitted as 0 → target setting car 36 → target car 32, and target car 32
A guide needle (not shown) press-fitted into the guide pipe is rotated.

This reference operation knob 42 is rotatably supported by a snap fitting I-claw 43 on a back case 44 via a spring seat 46 which is an elastic pressing means, and a knob for preventing reverse rotation 5 is provided on the back side.
0 is formed to protrude in the axial direction.

FIG. 3 shows a plan view of the reference operation knob 42 seen from the back, and FIG. 4 shows a sectional view taken along the line A--A in FIG. 3.

In this way, the knob reversal prevention pawl 50 is approximately the same as the operation knob 4.
Consisting of a crest 50a and a trough 50b concentrically with the burst circumference of 2, a gentle slope 5 is formed between the crest 50a and the trough 50b.
Continuous by 0C or indoor 50d.

Further, the back case 44 that pivotally supports the guide operation knob 42 is provided with a reversal prevention pawl 52 that engages with a knob reversal prevention pawl 50 of the guide operation knob 42.

FIG. 5 shows a plan view of the anti-reverse claw portion formed on the back case, and FIG. 6 shows a sectional view taken along the line B--B in FIG. 5.

In this way, like the knob reversal prevention pawl 50, the reversal prevention pawl 52 is formed in a circular shape and consists of a crest 52a and a trough 52b, and there is a gentle slope between the crest 52a and the trough 52b. 5
2 C or is continuous by a cliff portion 52 d.

The first embodiment of the present invention has the above configuration, and its operation will be explained below.

Fig. 7 shows the knob 50 for preventing reverse rotation of the rough operating knob 42.
A cross-sectional view is shown in which the reverse rotation prevention pawl 52 formed on the back case 44 is engaged with the reverse rotation prevention pawl 52 .

When a rotational force is applied to the guide knob 42 due to finger pressure, the guide knob tilts depending on the direction of the push because there is a gap between the snap fitting 1~claw and the member.
At the same time, when the rotation direction is in the direction indicated by the arrow, the gentle slope 50C of the reverse rotation prevention claw 50 moves up the gentle slope 52C of the reverse rotation prevention claw 52, and the guideline operation knob 42 moves in the axial direction, allowing the guideline operation to be performed. Rotation of the knob 42 becomes possible.

The rotation is then transmitted to the transmission wheel 40 and then to the clock train.

Also, if you try to rotate the guide control knob 42 in the direction opposite to the direction indicated by the arrow, the indoor 50 d of the knob reversal prevention claw 50 will push the indoor 52 d of the reverse rotation prevention claw 52. The reference operation knob 42 cannot be rotated in words.

As described above, in the present invention, since the reversal prevention pawl is provided on the back case and the operation knob, reversal can be reliably prevented even if a larger force is applied than in the past.

FIG. 8 shows a second embodiment of the invention.

In the first embodiment, a reversal prevention pawl that engages with the knob reversal prevention pawl 50 of the standard operation knob 42 was provided on the back case 44, but in this second embodiment, a reversal prevention pawl (60 in FIG. 8) is provided. This embodiment is characterized by being provided on the upper plate 22, and the shape and operation of the anti-reverse claw 60 are the same as in the first embodiment.
The explanation will be omitted.

Note that the other configurations are the same as those in the first embodiment, so the same reference numerals are given and the explanation will be omitted.

As described above, although the reference operating device has been described in this embodiment, the present invention can also be implemented with other operating devices.

As described above, according to the present invention, it is possible to prevent reverse rotation even in the case of a strong reverse force, and it is possible to obtain an operating device such as a watch that has a simple structure and a small number of parts.

Further, since the number of parts is reduced, the design space can be significantly saved, and the watch movement 1 can be made thinner and smaller.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing a conventional operating device, Fig. 2 is a sectional view of the main part showing the first embodiment of the present invention, Fig. 3 is a plan view of the reference operating knob seen from the back, and Fig. 4 is a sectional view of the main part showing the conventional operating device. The diagram is A-A in Figure 3.
5 is a plan view of the anti-reverse claw provided on the back case, Fig. 6 is a sectional view taken along line B-B in Fig. 5, and Fig. 7 is the engagement of the anti-reverse claw of the knob and the anti-reverse claw. FIG. 8 is a sectional view of a main part showing a second embodiment of the present invention. 22...Top plate, 42...Guide control knob, 44...Back case, 50...Knob reversal prevention claw, 52... Reversal prevention claw, 60...
...Reversal prevention claw.

Claims (4)

[Scope of utility model registration request] (1) It has a pipe shaft, the pipe shaft is divided into arcuate parts by axial notches, a snap-fit claw is provided at the end of the shaft, and a finger locking part is formed on the operating surface to allow the finger to The pipe shaft is supported via an elastic pressing means between an operating knob that is rotatable when pressed and has an anti-reverse claw protruding in the axial direction formed on the back surface of the operating knob, and a snap fit claw. and a part provided with a reversal prevention pawl that engages with the reversal prevention, and when the operation knob is pressed, the snap fit is tilted due to the gap between the snap fit pawl and the member, and when the operation knob is about to reverse, the operation knob is prevented from reversing. An operating device for a watch or the like, characterized in that a prevention claw and a reversal prevention claw of a member engage to prevent the operating knob from being reversed. (2) Utility Model Registration The operating device for a watch or the like as set forth in claim 1, characterized in that the member for pivotally supporting the operating knob is constituted by the back case of the watch. (3) Utility Model Registration Scope of Claim 1: The operating device for a watch or the like, characterized in that the member for pivotally supporting the operating knob is constituted by the main plate of the watch. (4) Utility Model Registration Scope of Claim 1: An operating device such as a watch, characterized in that a gear portion is provided on the peripheral surface of the operating knob.