JPS5935821Y2 - Mobile watch dial fixing structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dial fixing structure for a portable timepiece such as a wristwatch.

Conventionally, the dial of a wristwatch has generally been fixed in such a way that fixing feet provided on the back of the dial are inserted into holes provided on the top of the movement and are engaged and fixed.

This structure (rl, movement, case, and variations in thickness accuracy in the assembled state of parts) is absorbed by providing a gap between the top surface of the dial and the design ring.

Therefore, in terms of appearance, a major drawback of the conventional structure is that the gap in the parting part of the dial is noticeable and the appearance is poor.

The present invention was devised to improve the above-mentioned drawbacks, and its purpose is to eliminate the gap between the upper surface of the dial and the design ring, and to create a clean appearance around the parting part of the dial.

First, to explain the conventional structure in detail with reference to Fig. 1, 1 is a cover glass, 2 is a dial, 3 is a foot arranged on the back of the dial, 4 is a design ring, 5 is a glass side gasket, and 6 is an edge. ,7
is the middle frame, 8 is the packing, 9 is the dial 1 control screw, 10 is the back cover, 11 is the body, 12 is the movement, 13 is the movement dial fixing hole, 14 is the dial 2 and the design ring 4
Gap between, 15 (D case movement depth, 16
17 is the glass fixing position, and 18 is the mounting position of the dial 2.

The dial 2 is inserted into the dial fixing hole 13 of the movement 120 with the fixing foot 3 on the back, and is fixed by the dial fixing screw 9.

Gap 14 between the dial 2 and the design ring 4 in the assembled state! /
i. Dimensions in the thickness direction of the case, movement, and parts, i.e., the thickness of the dial 2 and the dial mounting position 1
It is composed of the sum of the movement depth 15, the thickness of the seal 8 and middle frame 7, the edge glass depth 16, the thickness of the design ring 4, and the glass fixing position 17, which corresponds to the value added by 8. The size of the gap is determined by the variation in each dimensional characteristic.

Specifically 74. Although the magnitude of the variation is -i and the additivity of the dispersion is applied, the amount of gap becomes 15/10CILm or more, and it is difficult to increase the part accuracy and suppress the amount of gap.

The present invention aims to improve the above-mentioned drawbacks.

The embodiment of the present invention will be explained with reference to FIG. 2, 221d:
Dial plate, 23 is a foot placed on the back of the dial, 44 is a design ring with a mirror or decorative finish, 32 is a movement,
Reference numeral 33 designates a dial fixing hole having the shape of a pocket hole and having a bottom surface located on the top surface of the movement, and 35 designating an elastic gasket shown in FIG.

The elastic gasket serves as a pocket hole as shown in FIG. 3, and has an elastic protrusion 40 on its inner bottom surface for pushing up the dial foot.

The material of the elastic packing is preferably rubber or synthetic resin.

Further, the elastic protrusion may be provided on the outer bottom surface of the elastic packing.

34 is a gap between the design ring 24 and the dial plate 22.

The dial 22 is fixed to the movement 32 by inserting the fixing feet 23 on the back side into the dial fixing hole 33 of the movement 32 and into the hole of an elastic packing 35 provided on the bottom surface thereof.

At this time, an interference margin is provided between the fixing leg 23, the fixing hole 33 of the movement, and the hole of the elastic packing 35.

Gap 34 between dial 22 and design ring 24 in assembled state
Since the dial 22 is always pushed upward by the elastic gasket 35, the dial 22 comes into contact and there is no gap.

The effect of pushing up the dial by the elastic packing 35 is the third
The elastic protrusions 40 shown in the figure improve the performance of the vehicle.

Moreover, since the dial foot 23 is fixed in the radial direction with an elastic gasket and an interference margin, not only can dimensional errors in the radial direction be absorbed, but even if external shocks such as drops or collisions are applied, the elastic gasket can The radial elastic force of the dial absorbs the shock and prevents damage to the dial foot.

As explained in detail above, the present invention makes it possible to eliminate the gap between the dial and the design ring, which was a major drawback of the conventional structure.

That is, by implementing the present invention, it is possible to realize a dial fixing structure for a portable watch that has a neat dial parting and a good appearance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a conventional dial fixing structure. FIG. 2 is a sectional view showing an embodiment of the present invention. FIG. 3 is a sectional view of the elastic packing used in the present invention. 2.22... Dial plate, 3, 23... Legs arranged on the back of the dial plate, 14, 34... Gap, 4, 24... Design ring, 35... Elastic packing 0

Claims (1)

[Scope of utility model registration request] In the dial fixing structure of a mobile watch, the movement fixing feet are placed on the back of the dial, and the dial feet are inserted into the dial fixing holes provided on the top of the movement to engage and fix the dial and movement. An elastic gasket having elastic protrusions on the inner bottom surface or the outer bottom surface is disposed within the dial plate 1 positioning hole and on the bottom surface thereof, and an interference margin is attached to the foot of the dial plate in the eye hole of the elastic gasket. When inserted, the feet of the dial are pushed upward by the elastic protrusions of the elastic packing, thereby eliminating the gap between the dial and a design ring or frame disposed above the dial. Fixed structure of dial of mobile watch.