JPH0619113Y2 - Watch structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to the structure of a timepiece.

[Outline of the Invention] In the present invention, in the structure of a timepiece, a part of a plastic member (for example, a circuit board seat) stacked on one of a certain member (for example, a ground plate) is replaced with a metal member such as the ground plate. By arranging on the first surface side and protruding the pin of this plastic member to the other surface of the main plate through the guide hole of the main plate to guide the movable member, it is possible to obtain a thin, easy-to-process and high-quality watch. It is the one.

[Conventional technology]

Conventionally, as shown in FIG. 2, the center of rotation of the member of the timepiece is
It is configured by a pin that is pulled out or driven in from a certain member (for example, a metal member such as a base plate).

[Problems to be solved by the invention]

According to the conventional method, since it is composed of a pin that is pulled out or driven in, the number of processing steps is large and the cost of parts is high.

In addition, because the extraction pin does not have very good positional accuracy,
It has a drawback that it is not suitable for a watch such as a thin watch having a small clearance between parts.

[Means for solving problems]

In order to solve the above problems, in the present invention, a pin formed on a plastic member (for example, a circuit board seat) stacked on one of a certain member (for example, a ground plane) is
The structure is such that it is assembled in the guide hole of the base plate and protrudes to the other surface of the base plate, and the movable member is guided by this pin.

[Action]

In the timepiece configured as described above, the plastic member is accurately positioned in the guide hole of the metal member such as the main plate, and the movable member operates with the pin of the plastic member as the movable reference position.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, plastic members 3 stacked on the main plate 4
There, the circuit board 2 and the circuit pressing plate 1 are guided by the pins of the plastic member 3. Further, there is a date indicator driving wheel 5 on the opposite side through the main plate 4, and a pin is taken out from the plastic member 3 and a thick shaft portion close to the origin of the pin is incorporated in a guide hole of the main plate 4. The thin shaft near the tip of this pin is the base plate 4
Of the plastic member is protruded to the side of the second surface opposite to the first surface. Then, the date indicator driving wheel 5 which is a movable member is incorporated in the thin shaft portion of the pin. Date indicator presser 6
As a result, the date indicator driving wheel 5 is held with a clearance between it and the main plate 4.

FIG. 3 shows another embodiment, in which there is a circuit board seat 7 stacked on a base plate 4, and the circuit board seat 7 guides the circuit board 2 and the circuit holding plate 1 having a gradual pattern by a plastic pin. ing.

Further, the plastic member 3 is arranged on the first surface of the main plate 4 in a downward direction with the main plate 4 interposed therebetween. Plastic member 3
The thick shaft portion of the pin is installed in the guide hole of the main plate 4. This pin projects to the foot on the second side of the main plate. The slow-and-fast switch 8 is rotatably incorporated into a thin shaft portion provided on a step portion on the tip side of the shaft portion having an intermediate thickness of the pin. The tip of the slow switch 8 contacts the pattern of the circuit board 2 and rotates.

[Effect of device]

As described above, this invention has a structure in which a pin of a plastic member is incorporated in a guide hole of a metal member such as a main plate, the pin is projected to the side opposite to the side where the plastic member is arranged, and the movable member is guided by this pin. did. Therefore, the position of the pin is positioned with reference to the guide hole of the main plate, so that the accuracy is high.

Further, since the metal base plate is used, sufficient strength can be obtained and the timepiece can be made thin, and since the shaft portion of the pin is made of plastic, lubrication is unnecessary. Since the pins can be processed by molding the plastic, there is an effect that the number of processing steps of the main plate can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a conventional example, and FIG. 3 is a sectional view showing another embodiment of the present invention. 1 ... Circuit retainer plate 2 ... Circuit board 3 ... Plastic member 4 ... Main plate 5 ... Day wheel drive 6 ... Date wheel retainer 7 ... Circuit board seat 8 ...

Claims (2)

[Scope of utility model registration request] 1. A metal member having a guide hole, the guide being disposed on the first surface side of the metal member, being guided by the guide hole, and protruding toward the second surface side of the metal member. A structure of a timepiece having a plastic member having a pin having an outer diameter not exceeding a hole diameter of the hole, and a movable member incorporated in the pin of the plastic member. 2. The timepiece structure according to claim 1, wherein the pin of the plastic member has a thick shaft portion and a thin shaft portion.