JPH059664Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a calendar correction mechanism for a portable watch.

(Prior Art) The calendar correction mechanism must be configured to be able to correct the date wheel and the day wheel simultaneously or separately. A structure in which the day wheel rotates has been adopted, and for this reason, a considerable number of man-hours are required for molding and assembling the parts.

(Purpose) The present invention was created in view of the above problems, and its purpose is to provide an improved calendar correction mechanism that can correct the date wheel and the day wheel independently or simultaneously with a simpler configuration. Our goal is to provide the following.

(Means for Achieving the Object) That is, the present invention is a calendar correction mechanism for achieving the above object, which is divided into parts so as to be able to bend toward the center independently of each other, and which are arranged on the same plane and facing each other in the circumferential direction. A calendar correction wheel equipped with three feed teeth formed by the end pieces of each extending arm is arranged so that the feed teeth can abut each tooth of a date wheel and a day wheel arranged on the same plane. It is arranged between the date wheel and the week wheel so that the date and day of the week can be corrected by rotating the correction wheel.

(Example) The details of the present invention will be explained below based on the illustrated example.

The drawing shows one embodiment of the present invention, and the reference numeral 1 in the drawing is a calendar correction wheel molded from POM resin, etc. This calendar correction wheel 1 has a circular protrusion 6 formed protrudingly on one side thereof. Day wheel presser 16
By rotatably fitting into the circular hole 17, three feed teeth 2, which will be described later, are formed protruding from the periphery of the circular hole 17.
... are arranged in positions such that they fit into the tip circles of the date wheel 11 and day wheel 13, respectively, and the crown-shaped teeth 7 provided on the lower surface are engaged with and disconnected from the wheel 9 on the winding stem 8. It is configured to allow

As mentioned above, this calendar correction wheel 1 has three feed teeth 2 formed on its periphery, but these feed teeth 2 have a slit 3 cut from their apex toward the center. two pieces 2a,
2b, and each of these pieces 2a, 2b further has left and right grooves 4, 4 extending circumferentially from the slit 3.
It is formed as a piece located at the end of a cantilever-shaped arm 5 spaced apart from the main body of the correction wheel 1 in the circumferential direction, and each feed tooth 2 . . .
2 or the teeth 14 of the day wheel 13, the piece 2a on the upper side in the direction of rotation bends downward and passes, and then the piece 2b on the lower side presses the teeth 12, 14 and the date wheel 11 or It is configured to correct the day wheel 13 by one tooth, and reference numeral 10 in the figure indicates a bolt for positioning the wheel 8.

The calendar correction wheel 1 configured as described above is in the position shown in the figure in normal use with the winding stem pushed in, that is, one of the feed dogs 2 is in the position of the day wheel 13.
It is in a position where it comes into contact with the teeth 14 of. Under this condition, when the day wheel 13 is fed once a day, its teeth 14 rotate the calendar correction wheel 1 while excluding the feed dog 2 located within the tooth tip circle, but the amount of rotation is Since the amount is small, it does not have any influence on the date wheel 11.

Next, under these conditions, today's car 11
In order to correct the winding stem 8, the winding stem 8 is pulled out, and the wheel 9, which is slidably attached to the shaft, is engaged with the crown teeth 7 of the calendar correction wheel 1 and rotated in one direction.
The calendar correction wheel 1 rotated counterclockwise in the figure (in the direction of the solid arrow) via the handwheel 9, and the feed tooth 2 of the calendar correction wheel 1, which is located on the upper side in the rotational direction, is attached to the ratchet tooth 12 of the date wheel 11. Bring it into contact. However, as described above, since this piece 2a is located at the end of the cantilevered arm 5 separated from the main body of the calendar correction wheel 1 by the groove 4, when it comes into contact with the ratchet teeth 12, the piece 2a
a bends toward the center and passes the tip of the tooth 12, and then the piece 2a located behind it comes into contact with the ratchet tooth 12 and rotates the date dial 11 by one tooth.

On the other hand, by this date correction operation, other feed dog 2
contacts the teeth 14 of the day wheel 13, but in this case, since the direction of rotation of the calendar correction wheel 1 is opposite to the direction in which the day wheel 13 is rotated, each piece 2a, 2
b comes into contact with the teeth 14 and bends toward the center depending on the degree of the slope, and passes through the tips of the teeth 14 one after another without rotating the day wheel 13.

Also, when the winding stem 8 is turned in the opposite direction to correct the day wheel 13, the calendar correction wheel 1 rotates clockwise in the figure (in the direction of the dashed arrow), and the feed dog 2 on the periphery...
The piece 2b located on the upper side in the rotational direction is the day wheel 1.
3 teeth 14. However, as in the case of correcting the date wheel 11, this piece 2b is separated from the main body of the calendar correction wheel 1 by the groove 4 and is attached to a cantilever-shaped arm 5.
Since it is located at the end, when it comes into contact with the tooth 14 of the day wheel 13, it bends toward the center and passes the tip of the tooth, and then the piece 2a at the rear thereof is used to correct the day wheel 13 by one tooth. On the other hand,
With this day of the week correction operation, the other feed dog 2 is set to the date wheel 11.
However, in this case, since the direction of rotation of the calendar correction wheel 1 is opposite to the direction in which the date dial 11 is rotated, each piece 2b, 2a comes into contact with the ratchet tooth 12 from the inclined surface side. They contact each other and bend inward, and pass the tips of the teeth 12 one after another without rotating the date dial 11.

(Effects) As described above, according to the present invention, the calendar correction wheel is provided with pieces at the tips of the arms that are divided so as to be able to bend toward the center independently of each other and that extend in opposition to each other in the circumferential direction. Since three feed teeth are formed, even if this calendar correction wheel is placed directly between the date wheel and the day wheel, the piece on the lower side in the rotation direction can be used to control either the date wheel or the day wheel. can be corrected one tooth at a time without affecting the other, and this type of correction mechanism can be easily configured. In addition, under normal conditions, the feed dog is attached to each tooth of the date wheel and day wheel at the same time. By eliminating contact, these can be rotated without any trouble.

In addition, the pieces that make up each feed dog are provided on the same plane, and are configured to correct the date and day of the week by coming into contact with the teeth of the date wheel or day wheel, which are arranged on the same plane, depending on the direction of rotation. Therefore, the calendar correction wheel can be easily stamped and formed using a press, and the entire calendar mechanism including the correction mechanism can be arranged on one plane, making this type of mobile phone equipped with a calendar possible. The watch can be made simpler and thinner.

[Brief explanation of drawings]

FIG. 1 is a plan view of a calendar correction mechanism showing an embodiment of the present invention, and FIG. 2 is a side view thereof shown in cross section. 1...Calendar correction wheel, 2...Feed dog, 2a,
2b...piece, 7...winding stem, 8...tsuzumi wheel, 11
...day wheel, 13...day wheel.

Claims (1)

[Scope of utility model registration request] A calendar correction wheel is provided with three feed dogs which are divided so as to be able to bend toward the center independently of each other, and which are formed by pieces at the ends of each arm that extend oppositely in the circumferential direction on the same plane. 1. A calendar correction mechanism for a portable watch, characterized in that a feed tooth is disposed between a date wheel and a day wheel so that the feed teeth can come into contact with each tooth of the date wheel and day wheel, which are arranged on the same plane.