JPH0620155Y2 - Clock time adjustment mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a time adjustment mechanism of a pointer display type electronic timepiece.

[Conventional technology]

Although many methods of adjusting the time of the hands by winding the stem have been devised from the past, some transmissions of rotation are provided by utilizing the meshing orthogonal to the hands such as the hour hand wheel and the minute hand wheel. For example, it is the relationship between the crown wheel 4 and the setting wheel 5 shown in FIG. 3, and the relationship between the winding stem pinion 3C at the tip of the winding stem 3 and the crown-shaped Hinoura wheel 6 shown in FIG. . FIG. 3 shows a cross-sectional view of a time adjustment mechanism generally used conventionally. According to the example of FIG. 3, when the winding stem 3 is operated in the axial direction, the ratchet wheel 4 slides in the axial direction of the winding stem 3 and meshes with the small iron wheel 5 by the cam operation of the mandrel 10 and the hook 11. Then, the rotation of the winding stem 3 causes the rotation to be transmitted to the wheel and pinion 4 which is engaged with the winding stem 3 at the corners thereof, and the clock wheel 8 via the small iron wheel 5 and the Hino back wheel 6. The minute hand wheel 9 is rotated to adjust the time of the hands. At this time, the crown wheel 4 constitutes a recess engagement recess for moving in the winding true axis direction by the spring force of the winding wheel 11 in the winding true axis direction. FIG. 4 shows a sectional view of the time adjustment mechanism. According to the example shown in FIG. 4, the winding stem pinion 3C directly connected to the winding stem 3 is directly meshed with the crown wheel-shaped Hino back wheel 6 to adjust the time of the hands.

By the way, the applicant of the present invention has proposed a structure as shown in Japanese Utility Model Laid-Open No. 59-54877 regarding the fitting structure of the shaft and the vehicle. In other words, as a quick-correction mechanism for the date dial, the quick-correction vehicle that drives the date dial pushes and pulls the winding stem to elastically fit the large diameter portion of the winding stem to transmit the rotation of the winding stem to the rapid-correction vehicle. There is described a configuration in which the date dial is driven to be loosely engaged with the small diameter portion of the winding stem to prevent the rotation of the winding stem from being transmitted to the quick-correction vehicle.

[Problems to be solved by the invention]

In the structure shown in FIG. 3, the mandarin duck 10 and the cannuki 1 for sliding the wheel & pinion 4 in the axial direction of the winding stem 3.
Since the number of parts such as 1 is required, and the number of parts is increased as the number of parts is increased, the structure is disadvantageous in terms of cost. Further, since the recessed wheel 4 is formed with a recess for engaging the lock wheel 11, it is necessary to provide a wall on the crowned wheel 4 itself, so that a certain length is required. Furthermore, since the spiral wheel 4 has to be slid in the axial direction of the winding stem 3, a space for a stroke is also required, which has a drawback that the winding stem axis direction becomes a relatively large timepiece. There is.

Further, in the structure shown in FIG. 4, since the time can be adjusted by the winding stem kana portion 3C directly connected to the winding stem 3 and the Hino back wheel 6, the number of parts is small, but the winding stem kana portion 3C and the Hino back wheel are provided. Since it is difficult to manufacture parts such as 6, there is still a cost disadvantage.

Further, it is practically impossible to constantly drive the train wheel of the pointer correcting mechanism of the orthogonal meshing in the normal hand movement state of the timepiece because the load increases. In the example of FIG. 3, the wheel and pinion 4 is always meshed with the setting wheel 5 without sliding in the axial direction of the winding stem 3,
In the case of adopting a structure in which the angle fitting between the wheel sheave 4 and the winding stem 3 is separated, the transmission efficiency of the orthogonal meshing is deteriorated, and it is necessary to take a large clearance between the parts for smoothly fitting the corners. It caused a bulge and caused the watch to stop, resulting in a major quality defect.

Further, in a configuration example such as Japanese Utility Model Laid-Open No. 59-54877, at the time of normal hand movement, the quick-correction vehicle is loosely fitted to the winding stem, and the quick-correction vehicle is meshed with the date plate due to its own weight. Since it is configured to be disengaged and there is no restricting member at all, when the dial is turned down, it will be in a state of meshing with the date plate by its own weight. There is no problem because this is the relationship between the date plate and the quick-correction vehicle, but if such a mechanism is applied to the pointer wheel train that is always in the hand-moving state, the load will increase during the hand-moving and the battery life will decrease. However, in the worst case, there was a problem that it stopped for 2 to 3 seconds without knowing it, causing a so-called short stop.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a time adjustment mechanism which has a reduced number of parts, is inexpensive, and has no quality troubles such as stopping a choi.

[Means for solving problems]

In the time adjustment mechanism of the clock that adjusts the time of the hands by rotating the winding wheel and small iron wheel by rotating the winding stem, the small iron wheel that constantly meshes with the Hinoura wheel,
A gear wheel capable of meshing with a small iron wheel and a step on the side of the gear wheel on the outer circumference, and a wheel and pinion equipped with a fitting hole for the winding stem at the center and friction fitting with the fitting hole of the wheel and wheel. A winding stem having a Tsutsumi fitting portion that engages with each other and a Tsutsumi engagement portion that loosely engages with a fitting hole of the Tsuru wheel, and a protrusion that guides the winding stem and contacts the side surface of the Tsuru wheel. It consists of a base plate on which the contact part is formed and a spring part that engages with the outer peripheral step of the wheel and exerts a force in the radial direction of the wheel to keep the wheel away from the iron wheel. When the difference in level between the small part and the small part is such that the small wheel and the wheel are disengaged from each other, and when the small wheel is placed in the position of the small part, the spring makes the small part of the small part completely than the small part. It is characterized in that it is in a disengaged state.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a time adjustment mechanism in a time adjustment state showing an embodiment of the present invention. The winding stem 3 is sandwiched between the main plate 1 and the train wheel bridge 2, and the claw loosening portion 3b is provided in the tip direction thereof.
And the Tsutsumi fitting portion 3a.

The gear wheel 14 is composed of an elastic member and has a center hole 14a.
Has a rotational force that is frictionally coupled to the Tsutsumi fitting portion 3a of the winding stem 3 and rotates in synchronism with the winding stem 3 to transmit the rotating force of the winding stem 3 to the small iron wheel 5 meshing with the Tsushin wheel 14. There is. Also, winding true 3
A moderation plate 7 is in contact with the shaft, which controls the stroke of the winding stem 3 in the axial direction and gives an appropriate click feeling. The spring portion 7a, which is a part of the moderation plate 7, has a spiral wheel 1
The crown wheel 14 is always pressed in the direction of the dial 12 by coming into contact with the body portion formed in the step shape of No. 4.

When the winding stem 3 is rotated in this state, the crown wheel 14 frictionally coupled to the winding stem 3 is rotated, the small iron wheel 5 is rotated, and the minute hand wheel 9 and the hour hand wheel 8 are passed through the Hino back wheel 6. It is transmitted to and the time of the hands is adjusted.

FIG. 2 is a sectional view of the time adjustment mechanism in a normal hand movement state showing one embodiment of the present invention. It shows a state in which the winding stem 3 is pushed in from the state of FIG. 1 toward the pointer shaft side in the axial direction. At this time, the crown wheel 14 comes into contact with the window portion 1a of the main plate 1 and the frictional connection with the winding stem 3 is released, so that the crown wheel 14 comes into a state of loose fitting with the crown meshing portion 3b of the winding stem 3. Then, by making a large difference in diameter between the center hole 14a of the crown wheel 14 and the crown engaging portion 3b of the winding stem 3, the force of the spring portion 7a of the moderating plate 7 abutting on the body portion of the crown wheel 3 causes the crown. The wheel 14 moves in the direction of the dial 12 and the meshing with the small wheel 5 deviates, so that the small wheel 5 becomes free and no unnecessary load is generated against the driving force of the normal hand movement.

On the contrary, when the winding stem is pulled out from the state of FIG. 2 (normal hand movement state) and moves to the state of FIG. 1 (time correction state), the winding stem 3 is provided between the crook engagement portion 3b and the crook fitting portion 3a. With the taper portion, while moving the wheel & pinion 14 in a direction away from the dial 12 and at a right angle with respect to the axis of the winding stem 3, the wheel & pinion 14 is frictionally coupled and the time setting state of the small iron wheel 5 and the meshing hand is adjusted.

[Effects of the Invention] As is apparent from the above description, according to the present invention, the meshing between the small iron wheel and the wheeled wheel, which have a high cross load and a heavy load, can be completely disconnected in the normal time hand movement state, so that a slight stop etc. The defects of can be completely eliminated, and the quality of the watch can be improved. Further, it is possible to achieve cost reduction without increasing the number of parts and without forming a complicated part shape. In addition, the compact wheel wheel enables the axial dimension of the winding stem to be reduced, making it possible to use it for watches with a slender design, narrow in the 3 o'clock to 9 o'clock direction as seen in women's dress watches. It was possible to achieve a great effect in terms of space efficiency.

[Brief description of drawings]

FIG. 1 is a sectional view showing a time adjustment state of a time adjustment mechanism according to an embodiment of the present invention, FIG. 2 is a sectional view showing a normal hand movement state of FIG. 1, and FIGS. It is sectional drawing which shows a correction mechanism. 1 ... Main plate, 3 ... Winding stem, 3a ... Tsutsumi fitting part, 3b ... Tsuzuki mating part, 4 ... Tsuji wheel, 5 ... Small iron wheel, 7 ... Moderation plate, 7a ... Spring part .

Claims (1)

[Scope of utility model registration request] 1. A timepiece adjusting mechanism for a timepiece for rotating a hand wheel through a Tsutsumi wheel or a small iron wheel by rotating a winding stem to adjust the time of the hands, and a small iron wheel which always meshes with a Hinoura wheel. A gear wheel on the outer periphery, which has a gear portion capable of meshing with the small iron wheel, a step portion on the side of the gear portion, and a fitting hole for the winding stem in the center, and a fitting hole for the gear wheel. A winding stem having a Tsutsumi fitting portion that engages fit-to-fit by coupling and a Tsutsumi engaging portion that loosely engages with a fitting hole of the Tsuru wheel and a guide of the winding stem of the Tsuru wheel. A base plate having an abutting portion formed in contact with the side surface, and a spring portion that engages with an outer peripheral step portion of the crown wheel and exerts a force in a radial direction of the crown wheel to keep the crown wheel away from the small iron wheel. And the dimensional difference in step between the Tsutsumi fitting portion and the Tsutsumi loosening portion is equal to that of the small iron wheel. When the gear wheel is disengaged with the Tsutsumi wheel or more, and the Tsuzuki wheel is placed at the position of the Tsutsumi engaging portion, the spring portion causes the Tsuzuki to be completely disengaged from the small iron wheel. A time adjustment mechanism for a clock characterized by the above.