JPH048391Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improving the quality and ease of assembly of a calendar mechanism for a timepiece.

[Summary of the idea]

The present invention improves the date wheel (hereinafter referred to as the date wheel), which is a positioning member for positioning the date wheel (hereinafter referred to as the date wheel), which is a calendar member in the calendar mechanism of a watch. This aims to improve the quality of the calendar mechanism and improve the ease of installation.

[Conventional technology]

In the conventional calendar mechanism in which the guide shaft of the day-release lever overlaps the date wheel, the elastic part fulcrum part 11--which operates the day-release lever 11--
The height of the date jump control portion 11-b that engages with the date dial 12 was different in cross-section.

[Problem that the invention attempts to solve]

However, in the conventional calendar mechanism, after installation, a rotational moment is applied to the date control lever 11 (to explain with a diagram, clockwise rotation is applied), and the date dial 11 is rotated clockwise.
2 and the day jump control part 11-b could easily become disengaged.

In addition, since the elastic part 11-a has an initial deflection, when the elastic part is installed, it rides on the main plate wall surface 13-a.
-c and the main plate guide shaft 13-b come off, etc.
There were also many installation defects.

Therefore, in order to solve these conventional problems, the present invention improves the engagement part of the date wheel and the fulcrum part of the elastic part of the date lever placed on the underside of the date wheel. The purpose of the present invention is to provide a calendar mechanism for a watch with good performance and stable quality.

[Means for solving problems]

In order to solve the above problems, a calendar mechanism for a timepiece according to the present invention includes a base plate supporting a calendar member, and a positioning member for positioning the calendar member, wherein the positioning member a spring restraint part that engages with the member; an elastic part that is bent from the spring restraint part and extends with a step from the spring restraint part; and an elastic part that is bent from one end of the elastic part and stands upright with an inclination. a fulcrum part, the jump part and the elastic fulcrum part are located at approximately the same height, and a part of the elastic part is guided by the main plate on the main plate side from the calendar member. Features.

[Effect]

According to the calendar mechanism of the watch configured as described above, the day movement control section (hereinafter referred to as the day movement control section), which is the movement control section that engages with the date wheel, and the elastic fulcrum section are approximately at the same height. As a result, a high quality calendar mechanism for a watch is obtained in which no bending moment is applied to the date control lever and the date wheel and date control lever do not come off.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an assembled plan view showing a calendar mechanism of a timepiece according to an embodiment of the present invention. Fig. 2 shows a sectional view of the main part.

Reference numeral 1 designates a base plate which is a clock frame, 2 an hour wheel on which an hour hand is attached, and 3 a date wheel having a date pawl 3-a that meshes with the hour wheel and engages with a date wheel 5, which will be described later.
Reference numeral 4 is a diagonal lever that engages with the main plate guide shaft 1-a. The day jump system lever guide shaft 1-a is arranged to overlap the date wheel 5 (indicated by a broken line). The Nikkaku control lever includes a Nikkaku control portion 4-a that engages with the date wheel gear 5-a, and a Nikkaku control portion 4-a that engages with the date wheel gear 5-a.
-a, and an elastic part 4-b which is bent from the date adjustment part 4-a and extends with a step to apply a certain force to the date dial; and an elastic fulcrum portion 4-C that stands upright. The elastic part fulcrum part 4-c is the fulcrum part 4-a of the elastic part.
It is located at almost the same cross-sectional height as. 5 is a date wheel guided by the main plate guide wall and positioned by the date control section. Reference numeral 6 denotes a date wheel holder, which is guided by main plate shafts 1-b and 1-c and determines the height position in the cross-sectional direction of the hour wheel, date wheel, date control lever, and date wheel. The date wheel holder is fixed to the main plate with screws 7 and 8.

When the Nikkei lever is assembled in this way, the Nikkei lever, the date dial engagement part, and the elastic fulcrum part of the Nikkei lever are guided to almost the same cross-sectional height, so no bending moment is applied. It prevents disengagement with the date indicator and improves quality reliability.

In the above embodiments, the bending angle of the elastic fulcrum part of the Nikyaku lever is
A range of 45° to 90° or less works more effectively.

〔effect〕

As explained above, the present invention uses an elastic material to make the day movement control part and the elastic fulcrum part of the day movement control lever located on the lower surface of the date wheel, which is the calendar wheel, almost at the same height in the calendar mechanism of a watch. By diagonally bending the fulcrum part, the following effects can be obtained.

1. Since the day movement control part and the elastic fulcrum part are at almost the same height, no rotational moment is applied to the day movement control lever, and the day movement control part and the date wheel teeth do not disengage, resulting in a high-quality watch. A calendar mechanism is obtained.

2. When assembled, the elastic fulcrum part of the Nikyaku System lever is bent diagonally, so if the Nikyaku System lever is installed straight from the top surface onto the main plate guide shaft, the elastic part will move along the main plate wall surface. It can be easily installed because it receives a force that causes it to be displaced in the lateral direction.

3. Since the elastic fulcrum part is in line contact with the main plate wall surface, brake loss due to friction is less than in the past, and the daily feed torque can be stabilized.

Effects such as this will occur.

[Brief explanation of drawings]

FIG. 1 is an assembled plan view showing a calendar mechanism of a timepiece according to an embodiment of the present invention. FIG. 2 shows a sectional view of the main part. FIG. 3 shows a cross-sectional view of a conventional calendar mechanism. 1...Main plate, 4...Nippon control lever, 4a...Nippon control part, 4b...Elastic part, 4C...Elastic fulcrum part,
5...day car.

Claims (1)

[Scope of utility model registration request] In a calendar mechanism for a timepiece, the calendar mechanism includes a base plate that supports a calendar member, and a positioning member that positions the calendar member, the positioning member having a jump control portion that engages with the calendar member, and a jump control portion that It has an elastic part that is bent and extends with a step from the jump restraint part, and an elastic fulcrum part that is bent from one end of the elastic part and stands upright with an inclination, and the spring restraint part and the elastic A calendar mechanism for a timepiece, characterized in that the elastic part is located at approximately the same height as a fulcrum part, and a part of the elastic part is guided by the main plate at a position closer to the main plate than the calendar member.