JPH0236146Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for holding a dial to a movement in a wristwatch having one or more sub hands.

[Conventional technology and problems]

Generally, the structure for holding the dial to the movement is
Insert the two dial feet protruding from the dial into the holes provided in the movement and secure by tightening screws or cams, or by press-fitting into an elastic member such as plastic. I'm doing it.
In the case of this method, the dial of a watch that does not have a secondary hand has only one needle hole in the center, so problems may occur due to misalignment when attaching the dial and dial foot, or when tightening screws when fixing. Even if the dial rotation misaligned, it did not have much of an effect on assembly work such as attaching the hands. However, in the case of a watch dial with a sub-hand, the needle hole of the sub-hand is usually placed relatively close to the outer periphery of the dial, and the hole diameter is small, so even the slightest sign If the plate shifts in the direction of rotation, the needle hole in the sub-hand section will be misaligned, making it difficult to position the dial accurately, causing the hands and dial to rub together, impairing the performance of the watch, or in the worst case scenario. There were cases where the needle could not be assembled and the needle could become loose, causing problems in production.

[Purpose of invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to enable accurate positioning of the needle hole even when forming the needle hole in the secondary needle part.
Therefore, it is an object of the present invention to provide a dial holding structure that is easy to assemble and has few defects.

[Example of idea]

The present invention will be explained in detail below based on the drawings.

FIG. 1 is a sectional view of a main part of a wristwatch dial holding structure according to an embodiment of the present invention, and FIG. 2 is a plan view of the wristwatch dial according to the present invention. In the figure, 1 is a dial plate made of one plate member, 2 and 2a are positioning holes provided in the dial plate 1, and in this embodiment, they are made up of a round hole 2 and an elongated hole 2a.
Dial positioning pins 3 and 3 protrude from the main plate 4, which is one of the watch parts stacked on the dial 1.
a to ensure accurate positioning of the dial plate 1. 5 and 5a are dial feet formed on the back side of the dial 1, and 6 is an insertion hole formed in a member made of plastic such as a winding stem spacer, which is one of the watch parts laminated with the dial. , are the fixed parts of the dial feet 5, 5a. 6a is dial foot 5,5
This is a ring-shaped groove to provide elasticity to the insertion hole 6 for fixing a, and even if the dial plate is formed with a misaligned dial foot position, the presence of the ring-shaped groove 6a elastically alleviates the misalignment. Therefore, the dial feet 5, 5a can be accommodated without any trouble. Moreover, since the dial feet 5, 5a have longer fitting portions than the relationship between the positioning hole and the pin, the dial 1 can be held securely even with elastic fixation. Reference numeral 7 indicates a needle hole in the auxiliary needle portion, and 8 indicates a needle hole in the central portion through which the hour and minute needle shafts pass. The needle hole 7 of the auxiliary needle portion is provided at a position apart from the needle hole 8 of the center portion. Reference numeral 9 designates a parting frame as a shielding member, which is one of the watch parts used in this example.
It also serves to hide the head of the watch, making the watch look better.

[Effect of idea]

Since the present invention has the above-mentioned configuration, it is possible to prevent defects during hand setting and deterioration of watch performance due to misalignment of the dial, etc., and provide a watch with stable quality that is easy to assemble. can do.

In addition, the dial is easy to process because it is a single plate.
Furthermore, the rigidity of the positioning part can be increased, making it possible to accurately position the dial.Also, since the dial is held by the dial feet, not only is it possible to hold it securely, but even slight misalignment can be easily corrected. .

Another advantage is that even when a shock is applied to the dial, there is a dial positioning pin in addition to the dial feet, which prevents deformation of the dial, and the hole into which the positioning pin fits is cut out. Since it is located below the frame and hides the head of the pin, it does not affect the appearance of the watch at all, and has a great practical effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a dial holding structure according to an embodiment of the present invention, and FIG. 2 is a plan view showing a dial holding structure according to the embodiment of FIG. 1...Dial board, 2...Positioning hole, 3, 3a...
...Dial positioning pin, 4...Main plate, 5, 5a...
...Dial plate foot, 6...Insertion hole for fixing dial plate foot, 6
a...Ring-shaped groove for providing elasticity, 7...
...Needle hole in the secondary needle part, 8 ... Needle hole in the center, 9 ... Parting frame.

Claims (1)

[Scope of utility model registration request] A plate material having a hole approximately in the center through which the hour and minute hand shafts pass, one or more holes through which the sub-hand shafts pass through at positions apart from the hour and minute hand shafts, and a dial foot protruding from the back surface. In the dial holding structure, the dial foot is elastically fixed to a fixing part of the watch part, and the dial foot is elastically fixed to a fixing part of the watch part. forming another holding part by forming a hole in the clock dial;
The holding portion is a positioning portion that rigidly positions a pin installed in the timepiece component, and further, at least the positioning portion is disposed below a shielding member in the timepiece component. Plate holding structure.