JPS5916850Y2 - Fixed structure of watch mechanical body - Google Patents

Description

[Detailed description of the invention] The present invention relates to a fixing structure for a timepiece machine body, and more specifically, the present invention provides a mounting piece 3 having a through hole 2 in a timepiece machine body 1, When pushed into the through hole 2 of the piece 3, the tip 5 is once pinched, and when it is completely pushed in, the tip 5 expands to restore its original state and has a slit 6 so that it can be caught on the mounting piece 3. A boss 8 provided with an undercut portion 7 is provided protruding from the case 4 to which the watch mechanism body 1 is attached, and has a protrusion portion 9 protruding from the flat surface of the case 4, so that when the watch mechanism body 1 is attached, its elasticity This relates to a fixing structure for a timepiece mechanism in which an elastic piece 10 having a function of pushing up the timepiece mechanism 1 is provided in the case 4 at a lower position of the timepiece mechanism 1.

Conventionally, the connection of parts that have no play after installation and that require positioning accuracy, such as the connection of a watch mechanical body (also called a movement, which drives the hands of a watch) and a case, is as shown in Figure 3. Positioning boss 8 and set screw 1 as shown
1, or by using a set screw 11 as shown in Fig. 4, but these methods have the drawbacks of requiring fixing screws and man-hours for tightening the screws, which are costly. be.

The present invention was developed in view of the above points, and its purpose is to allow the watch body to be securely attached to the case by simply fitting it in, and to attach separate parts for attachment such as screws. To provide a fixing structure for a watch mechanical body that can be assembled very easily without requiring such man-hours.

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

FIG. 1 is a partially cutaway front view showing the state in which the fixing structure of the timepiece mechanical body is coupled, and FIG. 2 is a perspective view showing the relationship before the fixing structure is coupled and fixed.

The watch mechanical body 1 is provided with a plurality of mounting pieces 3 having through holes 2.

On the other hand, the case 4 is integrally provided with a plurality of elastic pieces 10 having a boss 8 having an undercut portion 7 and a slit 6, and a projection portion 9.

The diameter a of the undercut portion 7 of the boss 8 becomes smaller than the diameter of the through hole 2 of the mounting piece 3 provided on the timepiece mechanism body 1 by applying force to the tip end 5 of the boss 8.

Furthermore, the protrusion 9 of the elastic piece 10 protrudes from the flat surface of the case 4.

By aligning the through hole 2 of the watch mechanism body 1 with the boss 8 and pushing it in, the undercut portion 7 of the boss 8 becomes narrower and smaller by the amount of the slit 6, passes through the through hole 2, and fits into the through hole 2. When the boss 8 completely passes through, it returns to its original diameter due to the elasticity of the boss 8 itself, and since a>b holds, the mounting piece 3 is caught on the undercut portion 7 of the boss 80.

When the watch mechanism body 1 is completely fitted into the boss 8, the protrusion 9 of the elastic piece 10 provided on the case 4 comes into contact with the lower surface of the watch mechanism body 1, so that the elastic piece 10 pushes up the watch mechanism body 1 with its elasticity. Since the mounting piece 3 of the watch body 1 is pressed against the undercut portion 7 of the boss 8, the watch body 1 is firmly fixed to the case 4.

In other words, when using undercut fitting, the C dimension of the boss 8 and the 6 dimensions of the watch mechanical body must be either c = d or C > d, and if C = d, it can be installed without vertical play. , Generally speaking, considering the variation in the dimensions of the parts and setting C>d, play inevitably occurs, but as described above, in the present invention, the elastic piece 10 that has the function of pushing up the watch mechanical body 1 is integrated into the case 4. Since it is provided, the clock mechanical body 1
is firmly fixed to the case 4.

As mentioned above, the fixing structure of the watch machine body of the present invention is provided with a mounting piece having a through hole in the watch machine body, and when it is pushed into the through hole of the mounting piece, the tip gets caught once, and when it is completely pushed in. A boss with a slit and an undercut part is provided protruding from the case to which the watch body is to be attached, so that the tip part expands and restores to its original state so that it can be caught on the mounting piece.
An elastic piece is provided at the bottom of the case, which has a protrusion that protrudes from the flat surface of the case and has the function of pushing up the watch mechanism when the watch mechanism is attached. It can be easily and firmly attached to the case by simply fitting it into the case without using separate parts such as screws.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing a coupled state of an embodiment of a fixing structure for a watch mechanical body according to the present invention, and FIG. 2 is a perspective view showing the relationship before the fixing structure is coupled. FIGS. 3 and 4 show conventional examples of fixing structures for watch mechanical bodies. 1... Watch mechanical body, 2... Through hole, 3
...Mounting piece, 4...Case, 5...
...Tip, 6...Slit, 7...
・Undercut part, 8...Boss, 9...
...Protrusion, 10...Elastic piece.

Claims (1)

[Scope of utility model registration request] A mounting piece having a through hole is provided in the watch mechanical body, and when the mounting piece is pushed into the through hole, the tip gets caught once, and when it is completely pushed in, the tip expands and restores to its original state for installation. A boss with a slit and an undercut part so that it can be hooked onto a piece is provided protruding from the case where the watch mechanism body is to be attached, and has a protrusion that protrudes from the flat surface of the case, so that when the watch mechanism body is attached, A fixing structure for a watch mechanism body, which includes an elastic piece that has a function of pushing up the watch mechanism body by its elasticity and is provided in a lower position of the watch mechanism body of the case.