JPH0616332Y2 - Clock with calendar correction mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a timepiece having a calendar correcting mechanism, and more particularly to a calendar correcting mechanism.

[Outline of device]

This invention is a calendar correction mechanism for a calendar timepiece, in which a switching mechanism that interlocks with an external operating member weakens the positioning force of the member for positioning the calendar display member only during the correction, so that the load applied to the calendar mechanism components during the calendar correction. The present invention provides a calendar correction mechanism capable of reducing the above.

[Conventional technology]

The conventional calendar correction mechanism is often used to perform correction by sending the teeth of the calendar display member by means of the date correction teeth provided on the handwheel that is interlocked with the movement of the external operation member. It is known that the calendar display member is positioned at a predetermined position by a positioning member having a constant positioning force.

[Problems to be solved by the invention]

However, in the conventional calendar correction mechanism, when the calendar is corrected, the teeth of the calendar display member are fed and corrected by the clutch wheel.At this time, the calendar display member is positioned at a predetermined position, and the date display shifts even if a shock is applied. Since there is no such positioning mechanism, a predetermined positioning force is constantly applied to correct the positioning member while releasing the positioning member. Therefore, the positioning force is applied to each component of the calendar mechanism during calendar correction. For this reason, the components constituting the calendar mechanism require a plane shape and thickness dimension sufficient to overcome the reaction force of the positioning force, which is an obstacle to downsizing and thinning of the timepiece. Further, for the purpose of cost reduction, there are many problems such as an obstacle to conversion of metal of calendar mechanism parts to plastic.

Therefore, in order to solve such a drawback of the related art, the present invention weakens the positioning force of the positioning member of the calendar display member by utilizing the movement of the switching component interlocking with the external operation member only when correcting the calendar. By providing a calendar correction mechanism with a light load without increasing the number of parts and the space required for plane and cross section, it is possible to provide a calendar correction mechanism that is compact and thin and can also reduce costs. It is an object.

[Means for solving problems]

In order to solve the above problems, the present invention is a calendar correction in which the positioning force of the calendar display member can be weakened only when the calendar is corrected by using the operation of the switching mechanism without largely changing the shape of the positioning member. It constitutes the mechanism.

[Action]

In the calendar correction mechanism of the present invention, the calendar display member is positioned by the positioning member. The positioning member has a spring portion, and this spring force is determined by a part of the switching mechanism. When the calendar correction position is reached by the operation of the external operation member, the spring degree determining portion of the switching mechanism moves to a position where the deflection of the spring of the positioning member is reduced.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a calendar display plate on which a date character 1a is printed. The tip circle portion 1b is planarly guided by a part of a timepiece component (not shown), and the center of rotation is centered around the timepiece. As per day, it is driven by a (360/31) degree minute clock train. Reference numeral 2 is a positioning member for positioning the calendar display plate 1 every day, and the calendar display member is positioned by pressing the teeth 1c of the calendar display plate 1 toward the outer peripheral direction of the calendar display plate 1 by the slope portion 2a. The positioning member 2 has a rotation center 2b and is pushed by the teeth 1c of the calendar display plate when the date is fed and when the date is adjusted, and the positioning member 2 rotates at the rotation center 2 to move the calendar display plate 1. An elastic portion 2c that generates a positioning force is formed at one end of the positioning member, and an end portion 2d of the elastic member 2c is in pressure contact with the tip portion 3a of the lever 3 that is a member that constitutes the switching mechanism.

Next, its operation will be described. FIG. 1 shows a state in which the timepiece is carried. External operation member and mountain portion 4a of the boot 4
Since the protrusion 2e of the end 2d of the positioning member 2 is in pressure contact with the tip 3a of the post 3 positioned by the elastic member 2c, the bending amount of the elastic portion 2c is sufficiently large to position the calendar display plate 1 reliably. The state of FIG. 2 shows the calendar correction state. The calendar correction is performed by the calendar correction teeth 5a of the clutch wheel 5 which is rotated by the external operation member and is positioned at the calendar correction position by the switching mechanism. At the time of this correction, the temple 3 is positioned at a position different from that shown in FIG. 1 by the external operation member and the mountain-shaped portion 4a of the hollow. Therefore, the positioning member 2
Since the concave portion 2f of the end portion 2d and the tip portion 3a of the post are in contact with each other, the amount of deflection of the elastic portion 2c is reduced by the difference between the protruding portion 2e of the end portion 2d and the concave portion 2f, so that the positioning force is reduced.

[Effect of device]

As described above, according to the present invention, in the timepiece having the calendar correction mechanism, the positioning force of the calendar display member is weakened by utilizing the movement of the switching part interlocking with the external operation member only when the calendar is corrected. Increase of the plane
Since it can be realized without enlarging the cross-sectional space, the present invention does not prevent thinning and miniaturization of the watch,
Since it is possible to eliminate anxiety about the strength of the calendar mechanism constituent parts, there is an effect that it is easy to reduce the size and thickness of each part and to reduce the cost by using plastic.

[Brief description of drawings]

FIG. 1 is a plan view of a calendar correction mechanism according to the present invention, and FIG. 2 is a plan view showing a correction state of the calendar correction mechanism. 1 …… Calendar display plate 2 …… Positioning member 3 …… Lesser 4 …… Steel 5 …… Crushing wheel

Claims (1)

[Scope of utility model registration request] 1. A timepiece having a calendar correction mechanism composed of a calendar display member, a positioning member engaging with the calendar display member, and a calendar feed wheel driven by a timepiece train wheel, for determining the position of the calendar display member. A positioning member having a spring portion, an external operating member that moves to a plurality of positions including a calendar correction position, and a spring degree determining member that interlocks with the movement of the external operating member,
The spring end portion of the positioning member and the tip end portion of the spring degree determining member are always in pressure contact with each other, but in the calendar correction position, the spring degree determining portion that reduces the deflection of the spring of the positioning member from other positions is switched. A timepiece having a calendar correction mechanism characterized by having a mechanism.