JPS585269Y2 - Protection structure of watch movement pointer display pipe - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a protection structure for a pointer display pipe of a timepiece movement, and uses a center locking nut to protect the pointer display pipe during assembly or transportation of the timepiece movement.

Table clocks and wall clocks are assembled by fixing the clock movement, including the clock train, to a dial or the like on the exterior of the clock, then attaching the pointer side, and then fixing the front glass.

Since the watch movement used here has a pointer display pipe for displaying hours and minutes that protrudes outward from the movement case, care must be taken to prevent the pointer display pipe from being damaged or deformed when assembling the watch movement. there was.

To this end, it is common practice to add a protective structure for the pointer display pipe to the assembly jig, etc., but this is a cause of high cost and an improvement is desired.

In addition, in recent years, it has become more common to buy and sell only watch movements, and problems such as damage or deformation of the pointer display pipe due to impact during transportation of the watch movement or falling of the transportation case have become a problem. .

The present invention solves the above-mentioned conventional problems, and its purpose is to prevent breakage or deformation of the pointer indicator pipe during assembly or transportation of a timepiece movement using a low-cost and simple means.

In order to achieve the above-mentioned object, the present invention is characterized in that a center locking nut for fixing the timepiece movement to the timepiece exterior is used as a protection member for the pointer display pipe.

Hereinafter, the present invention will be explained in detail based on preferred embodiments.

FIGS. 1 and 2 show a center stop nut for a timepiece according to the present invention, and FIGS. 3 and 4 show two forms in which the center stop nut is fixedly held on a timepiece movement. The shown center locking nut 2 is formed from a center hole 4, a flange portion 6, and a cylindrical projection 8, and is integrally molded from a synthetic resin material.

This center stop nut 2 has a □
A fixing means that can be fixedly held in both directions is formed.

Specifically, the fixing means is an annular groove 10 formed on the plane of the flange portion 6 and a threaded groove 12 formed on the outer peripheral surface of the cylindrical protrusion 8.

In the figure, reference numeral 14 is a retaining groove for a mounting jig (driver) used when mounting the center locking nut 2 to the clock mover.

FIG. 3 shows a state in which the center locking nut 2 is fixed in a state that protects the pointer indicator pipe 30.degree. 32 during assembly or transportation of the timepiece movement.

The clock movement case 20 has an annular groove 10 in the center locking nut 2. An annular projection 22 is formed as a fixing means corresponding to the annular groove 10 and the annular projection 2.
2 are fitted and connected to each other to be fixedly held in the timepiece movement case 20.

In this state, the cylindrical protrusion 8 of the center locking nut 2 covers and protects the hour hand indicator pipe 30, minute hand indicator pipe 32, and second hand indicator 34 that protrude from the case 20.

Therefore, the pointer indicator pipe 30, 32 and the second hand indicator 3
4 is not subject to unauthorized collisions from the radial and thrust directions, and is prevented from being damaged or deformed during assembly and transportation of the timepiece movement.

Note that the means for fixing and holding the center locking nut 2 and the timepiece movement case 20 here has a structure other than that shown in the embodiment, for example, an annular projection is formed on the center locking nut 2 and an annular groove is formed on the movement case 20. or,
It is possible to form a recess in the movement case 20 into which the entire flange portion 6 of the nut 2 is fitted.

FIG. 4 shows a state in which the timepiece movement is fixedly held against the dial of the timepiece exterior.

A thread groove 24 is formed in the timepiece movement case 20 as a fixing means corresponding to the thread groove 8 of the center locking nut 2.

In order to hold the movement fixed to the dial 40, the clock movement may be made to correspond to the dial 40, and the center locking nut 2 may be screwed and fixed to the movement case 20.

By doing so, the watch movement
The pointer display pipe 30 is firmly fixed to the
．． 32 and the second hand indicator 34 protrude so that the pointer side (not shown) can be attached.

As described above, the present invention is characterized in that the pointer display pipe is protected by using the center locking nut, which has been conventionally used as a holding and fixing member between the timepiece movement and the timepiece exterior.

Therefore, when assembling the timepiece movement, there is no need to add a protective structure for the pointer display pipe, making it possible to provide a timepiece at a lower cost than in the past.

Furthermore, the present invention can provide a protection structure for the pointer display pipe of a timepiece movement that has a very high practical value, such as being able to protect the pointer display pipe during transportation of the timepiece movement.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention, Figure 1 is a plan view of the center locking nut, Figure 2 is a sectional view taken along the line AA in Figure 1, and Figure 3 is a protection for the pointer indicator pipe. FIG. 4 is a sectional view showing the case where the center locking nut is fixed to the timepiece movement, and FIG. 4 is a sectional view showing the state where the timepiece movement is fixedly held to the dial. 2... Center stop nut, 10... Annular groove, 12... Screw groove, 20... Clock movement case, 22... Annular groove. Protrusion, 24・
...Thread groove, 30...Hour hand display pipe,
32...Minute hand display pipe, 34...Second hand indicator, 40...Dial plate.

Claims (1)

[Scope of utility model registration request] A fixing means capable of fixing and holding the clock movement in both directions is formed on a center stop nut that fixes the clock movement to the clock exterior, and a fixing means corresponding to the fixing means is formed on the clock movement. A protective structure for a pointer display pipe of a watch movement, which is characterized by: