JPS5841518Y2 - Calendar correction mechanism - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a calendar correction mechanism.

In a conventional calendar correction mechanism, the correction lever for the day wheel and the correction lever for the first wheel are each given a spring force in a predetermined direction by separate spring means, and each spring means is attached to a shaft or the like.

As a result, the structure becomes complicated and the number of parts increases, making it difficult to manufacture.
It took time to assemble.

The present invention eliminates the above-mentioned drawbacks, and also reduces the size of the watch.
The purpose is to make it thinner.

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

In Figure 1.2.4, the lower case 2 of the watch case 1 is made of synthetic resin such as polycarbonate, and the lower case is divided into a battery storage chamber 3 and a watch mechanism storage chamber 4 by a partition wall 2a. It is being

The battery storage chamber 3 is open at the rear, but the watch mechanism storage chamber 4 is sealed by the upper case 5.

Both the upper case 5 and the lower case 2 serve as a base plate.

6 is a battery. As shown in FIG. 1, levers 7 and 8 are attached to the front of the lower case 2, and the levers 7 and 8 move the day wheel 9 and day wheel 10 of the calendar mechanism.
This is a calendar correction lever that sends each calendar in a predetermined direction.

First, one lever 7 will be explained based on FIGS. 1 to 4.

The lever 7 is located in a groove 2b provided on the front surface of the lower case 2, and is supported through a support hole 7a to be removably inserted into a shaft portion 11, and is centered around this shaft portion.

The shaft portion 11 is provided integrally with the tip of the tongue piece 12 provided on the lower case 2, but this shaft portion may be fixed to the tongue piece as a separate member.

The tongue piece 12 is attached to the lower case 2 corresponding to the bottom of the battery storage chamber 3.
It is made flexible by cutting a U-shaped hole 13 at the position.

Both sides of the lever 7 are held by two presser protrusions 14 and 15.

The presser protrusions 14 and 15 project from the front surface of the lower case 2, and the inner base of each presser protrusion is provided with grooves 16 and 17 into which both sides of the lever 7 can be inserted, as shown in FIG. It is.

The arm portion 7b of the lever 7 extends rearward along the inclined portion 2C of the lower case 2, as shown in FIG.

Note that the lever 7 is connected to the stopper surface 18a of the groove 2b of the lower case 2.
, 18b restricts the rotation range.

The configuration and support state of the other lever 8 are substantially the same as those of the lever 7.

8a is a support hole, 11a is a shaft portion, 12a is a tongue piece, 13a
14a, 15a are holding grooves 16a, 17
This is a presser foot protrusion having a.

The lever 8 is located within the groove 2d, and its rotation range is regulated by a stopper surface 19 and a stopper pin 20.

By the way, both ends of one coil spring 21 are latched to the arm portions 7b, 8b of both levers 7.8.

One of the levers 7 is biased by a coil spring 21 in a counterclockwise direction in FIG.
The other lever 8 is biased by a spring force clockwise around the shaft portion 11a.

The coil spring 21 is disposed close to the notch formed by the inclined portion 2C in the longitudinal direction (in the direction perpendicular to the plane of the paper in FIG. 2).

Since the inclined portion 2C is provided at the corner 22 of the watch case 1, that is, the battery storage chamber 3, as shown in FIG. 2, the coil spring 21 can be stored in space efficiently without interfering with the storage of the battery 6 inside. .

The day wheel 9 and the date wheel 10 in the calendar mechanism are the first
As shown in the figure, the needle bearings 23 are arranged concentrically around the pointer bearing 23 protruding from the front surface of the lower case 2.

The day wheel 9 is placed on the inside, and the ring-shaped date wheel 10 is placed on the outside.

The day wheel 9 is a U-shaped stop plate 24 hooked onto the pointer bearing 23.
It is supported by the lower case 2 in a non-escapeable and rotatable manner, and its outer periphery is connected to the internal teeth 10a, which are provided on the inner periphery of the date dial 10, as shown in FIG. It is joined on top.

The rear surface of the day wheel 9 is integrally formed with toothed portions 9a.

Then, the day wheel 9 is moved one tooth at a time by the tip 7C of the lever 7 that can engage with the teeth 9a.

In FIGS. 4 and 5, reference numeral 28 denotes an arc-shaped protrusion disposed concentrically with the pointer bearing 23 on the front surface of the lower case 2.
is in contact with the back of the

In addition, the date dial 10 has its teeth 10a whose tips are rotatably fitted to the outer peripheral surface of the protrusion 28, and furthermore, according to the example shown in the first and fourth figures, is supported by three support columns 25, 26 and 27. It is irremovably supported by lower case 2.

That is, one support column 2 as shown in Figure 1.4.5.
5 is a part that protrudes to a certain extent from the inclined part 2C of the lower case 2,
The attachment of the head wheel 10 can sometimes be bent outward (to the left in FIG. 5).

The other support columns 26 and 27 protrude from the lower case 2.

There are grooves 25a, 2 on the inside of each support column 25, 26, 27.
6a and 27a are provided, and the outer peripheral edge 10b of the date indicator 10 is irremovably located in each groove.

The date wheel 10 is moved one tooth at a time by a tip 8C of a lever 8 that can be held on a tooth 10a.

Further, as shown in FIG. 1, the feed projections 29 a and 29 b of the cam 29 that are linked to the clock mechanism can be engaged with the tooth portion 9 a of the day wheel 9 and the tooth portion IC) a of the date wheel 10. It is.

30 is a click spring that is engaged with the day wheel 9;
1 is a click spring that is engaged with the date indicator 10.

To attach the lever 7 to the lower case 2, insert the lever side into the grooves 16 and 17 of the presser protrusions 14 and 15 from the left in FIG. is pushed downward in FIG. 2 by the lever, so the tongue piece 12 bends as shown by the chain line in FIGS. 2 and 3, and the shaft portion eventually fits into the support hole 7a of the lever.

As a result, the lever 7 has the shaft portion 11a and the presser protrusions 14, 15.
is supported by the lower case 2.

In addition, when removing the lever 7, in the state shown in the first and second figures, while holding the lever arm 7b, press the shaft part 11 downward with the tip of an appropriate tool and pull the lever to the left.
This lever is removed from the lower case 2.

The lever 8 is also attached and removed in the same manner as the lever 7.

For the coil spring 21, first press both levers 7.8.
The levers may be hooked at both ends thereof, or may be hooked to both levers after they are attached.Next, the operation of the present invention will be explained.

To correct the day of the week by rotating the day wheel 9, rotate the lever 7 clockwise about the shaft 11 against the spring force of the coil spring 21 as shown by the chain line in FIG. The portion 7C engages with the tooth portion 9a to move the day wheel counterclockwise one tooth at a time.

To correct the date by rotating the date wheel 10, use the lever 8.
against the spring force of the coil spring 21, the shaft portion 11a...
... is rotated counterclockwise around the center, and its tip 8C engages the internal teeth 10a of the date dial 10, and the master wheel is moved clockwise one tooth at a time.

If the correction lever 7 for the day wheel and the correction lever 8 for the slot wheel are attached to the lower case 2, which is a mounting plate, using the shaft portions 11, 11a, presser protrusions 14, 15, and 14a, 15a as shown above, Each lever can be attached and detached very easily, but the levers may be attached to the mounting plate by, for example, screw means, force tie means, or the like.

As explained above, according to the present invention, since both ends of one spring are hooked to the correction lever of the seventh wheel and the correction lever of the head wheel, the structure is simplified and the number of parts is reduced. Manufacturing 9 Assembly becomes easier.

Further, since the spring is arranged in the outer notch of the corner of the battery storage chamber, no extra space is required for the spring, and the watch can be made smaller and thinner, which has great practical effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is an enlarged sectional view taken along the line II-II of FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 1. The figure is a front view of the lower case, and FIG. 5 is an enlarged sectional view taken along the line v--V in FIG. 1, with the pointer shaft omitted. 2... Lower case, 2C... Inclined part, 3
...Battery storage compartment, 7...7 car correction lever, 8...4 car correction lever, 9...
- Day wheel, 10...Date wheel, 21...Spring, 22...Corner.

Claims (1)

[Scope of utility model registration request] A correction lever for the day wheel and a correction lever for the first wheel are rotatably attached to the mounting plate, and a spring whose both ends are latched to both correction levers and applies a spring force to each of the levers in a predetermined direction. and a calendar correction mechanism in which the spring is arranged in a notch in the corner of the battery storage chamber.