JPH0714953Y2 - Fixed structure of minute hand - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing a minute hand in an analog timepiece, and in particular, it is possible to secure a sufficient press-fitting allowance for a minute hand hakama even if the protruding portion of the pointer is reduced to make the movement thinner. Regarding the fixed structure of the minute hand hakama.

[0002]

2. Description of the Related Art As a well-known fixing structure for a minute hand pipe in a timepiece that displays the time in an analog manner with a minute hand and an hour hand,
There was one shown in FIG. In this fixed structure, a cylindrical minute hand bearing 4 erected on an upper plate 2 which constitutes a base plate.
The minute hand pipe 8 integrated with the minute hand wheel 6 is fitted onto the minute hand pipe 8 in a rotatable state, and the minute hand 10 is attached to the outer circumference or the inner circumference of the minute hand pipe 8.
The minute hand hakama 12 of No. 12 was press-fitted and fixed.

Further, an hour hand pipe 16 integral with the hour hand wheel 14 is provided on the outer periphery of the minute hand pipe 8, and the hour hand hook 20 of the hour hand 18 is fixed to this.

[0004]

Generally, in order to cope with the thinning of the watch case, the movement case is made thin and the protruding portion of the pointer is made as short as possible.

In order to shorten the protruding portion of the pointer in the above conventional fixing structure, it is necessary to shorten the height of the minute hand pipe 8 and the minute hand bearing 4. However, in the above structure, the fixing force of the minute hand 10 cannot be sufficiently secured unless the press-fitting margin for press-fitting the minute hand hooker 12 into the minute hand pipe 8 is set to a predetermined length. Therefore, if the minute hand pipe 8 and the minute hand bearing 4 are simply shortened, there is a problem that the press-fitting margin cannot be sufficiently secured.

Further, in the above structure, the minute hand hook 1
It is necessary to press fit 2 into the part of the minute hand pipe 8 where the minute hand bearing 4 is not inserted. Therefore, in order to secure a sufficient press-fitting margin and shorten the length of the minute hand pipe 8, the portion in which the minute hand bearing 4 is inserted and the minute hand bearing 4 must be shortened. However, when this is shortened, the inclination of the minute hand pipe 8 due to the clearance provided between the minute hand pipe 8 and the minute hand bearing 4 becomes large, and the minute hand 10 and the hour hand 18 do not rotate parallel to the dial, Minute hand 1
The wave around 0 and the hour hand 18 are generated. For this reason, there is a problem that a sword rubbing with the minute hand 10 and the hour hand 18 is likely to occur.

The present invention has been made in view of the above problems, and an object thereof is to provide a fixing structure of a minute hand which can sufficiently secure a press-fitting margin of a minute hand hooker even if the length of the minute hand pipe is shortened. It is in.

[0008]

The fixing structure of the minute hand of the present invention is a minute hand fixing structure of a timepiece for analog display with two hands of a minute hand and an hour hand, and a hollow convex minute hand bearing erected on the main plate, A minute hand pipe having a press-fitting portion axially supported on the outer circumference of the minute hand bearing and extending from the tip thereof to the inside of the minute hand bearing, and a minute hand hooker capable of being press-fitted into the press-fitting portion.

[0009]

In the present invention, the minute hand bearing is formed in a hollow convex shape, and the minute hand hooker is press-fitted into the press-fitting portion of the minute hand pipe extending therein. Therefore, it is not necessary to form the press-fitting part for attaching the minute hand hooker so as to escape the minute hand bearing,
The protruding portion can be shortened accordingly. In addition, the press-fitting margin of the minute hand hooker is secured almost as long as the height of the minute hand bearing.

[0010]

1 is a sectional view showing a fixing structure of a minute hand according to an embodiment of the present invention. The base plate in this embodiment is composed of an upper plate 22 and a lower plate 24, and a hollow convex minute hand bearing 26 is erected on the upper plate 22. The minute hand bearing 26 shown in the figure has a pipe shape, and may have a concave shape in which the lower opening in the figure is closed.

A minute hand wheel 30 driven by a day wheel 28
The minute hand pipe 32, which is integral with the, is externally fitted to the minute hand bearing 26 in a rotatable state, and a pipe-shaped press-fitting portion 34 extending into the minute hand bearing 26 is provided at the tip thereof.

On the outer circumference of the minute hand pipe 32, there is an hour hand pipe 38 which is integral with an hour hand wheel 36 driven by a back pinion of the sun.
Is rotatably fitted over the needle pipe 3 at this time.
The hour hand hook 42 of the hour hand 40 is fixed at 8. still,
At this time, a ring spring 44 is arranged between the hand wheel 36 and the lower plate 24.

A bar-shaped minute hand hook 48 protruding from the minute hand 46 is press-fitted into the press-fitting portion 34.

In the structure of this embodiment, the minute hand bearing 26
Since the press-fitting portion 34 is formed by bending and extending the tip of the minute hand pipe 32 therein, the press-fitting portion 34 is formed.
The length of the minute hand pipe 32 does not become long unlike the conventional one even if the length is extended to the same as that of the minute hand bearing 26. Therefore, even if the press-fitting portion 34 having a sufficient length for securely fixing the minute hand hooker 48 is provided, the minute hand pipe 32 does not largely project to the front of the clock and the thickness of the movement does not increase.

[0015]

According to the present invention, the press-fitting portion of the minute hand pipe can be extended without increasing the length of the minute hand pipe, and the minute hand can be securely fixed even if the protruding portion of the pointer such as the minute hand pipe is shortened. can do.

[Brief description of drawings]

FIG. 1 is a sectional view showing a fixing structure of a minute hand according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional fixing structure for a minute hand.

[Explanation of symbols]

 22 Upper plate 24 Lower plate 26 Minute hand bearing 30 Minute hand wheel 32 Minute hand pipe 34 Press fitting part 46 Minute hand 48 Minute hand Hakama

Claims (1)

[Scope of utility model registration request] 1. In a structure for fixing a minute hand of a timepiece that analog-displays with two hands of a minute hand and an hour hand, a hollow convex minute hand bearing erected on a main plate, and a minute hand bearing axially supported by the outer circumference of the minute hand bearing, and the minute hand from the tip thereof. A minute hand fixing structure comprising: a minute hand pipe having a press-fitting portion extending inward of a bearing; and a minute hand hooker capable of being press-fitted into the press-fitting portion.