JPS5836072Y2 - Inner frame structure on the mobile watch side - Google Patents

Description

[Detailed explanation of the invention] The main purpose of this invention is to significantly reduce the number of parts and costs compared to the conventional structure. When Q is fixed, Tomo (
This is related to the middle frame structure that also serves as a back cover.

To explain from drawing O, Fig. 1 is a cross-sectional view of a conventional two-side dial plate fixing structure, where 1 is a body which is a part of the side, 2 is a dial body, and 2a is a dial body mounting structure. It's a broken foot.

8 is a dial set screw for fixing the dial.

3 is the dial holder ring, 4 is the middle frame, 5 is the mechanical fixing spring, 6
is the back cover, 7 is the watch mechanism body, and 10 is the back cover.

The conventional fixing structure involves inserting the foot 2a provided on the dial body 2 into the watch mechanism body 7tt, and inserting this foot between the dial set screw 8Q and the threaded part of the watch mechanism body (fixed with a iron screw). There is.

In addition, the outer peripheral collar 7 of the watch mechanism body is used to fix the watch mechanism body and the side.
Place the top surface of the middle frame 4 on the bottom surface of a, and then press the middle frame and back cover 6.
A mechanical fixing spring 5 is provided between the dial support ring 3 and the body, which has the function of absorbing variations between the contact surface 1a and the back lid upper surface 6a and pushing upward.

The dial plate support ring 3 is assembled between the watch mechanical body and the dial plate, and when the distance between the dial plate support ring 3 and the date dial 9, which is a part of the watch mechanical body, is determined, both of them hit the surface 1a of the case, and are pushed up by the mechanical fixing spring. The structure is such that the watch mechanism body is fixed to the side of the inner frame that receives the watch mechanism body.

A back cover gasket 10 is installed between the back cover 6 and the body 1, and is compressed in the axial direction by screw tightening to prevent water, sweat, and dirt from entering from the outside.

This structure requires feet for the dial, and also requires screws to set the dial.

In addition, many parts are required, such as the dial holder ring, inner frame, mechanical fixing spring, and back cover gasket, resulting in high parts costs, and the assembly of fixing the dial to the watch mechanism, dial holder ring, inner frame, and mechanical fixing. Assembly by assembling the spring and back cover gasket (this takes time and increases assembly costs).

In addition, because the feet are brazed or welded to the dial plate, generally brass or nickel silver is used for the dial plate, but stones, precious stones, paper, and aluminum are used for the dial plate because of its appearance.

Plastics cannot be used because they cannot be brazed or welded, and the variety in appearance is also limited.

As explained above, the current structure has major drawbacks such as high component costs, high assembly costs, and restrictions on appearance.

The present invention attempts to eliminate this drawback by providing a middle frame that integrates the dial holder ring, middle frame, mechanical fixing spring, and back cover gasket, and combining this middle frame and the dial body without the dial part. By positioning and fixing the inner frame to the watch mechanical body, and fixing the side O, it is possible to significantly reduce costs and eliminate restrictions on dial material.

Drawings (To explain further, Fig. 2 is a vertical cross-sectional view of the side and dial part of the present invention, and 11 is a body which is a part of the side, 12
is the dial body, 13 is the middle frame, 17 is the watch mechanism body, 1
6 is the back button.

The dial body 12 is fixed by adhesive between the inner frame 13, the lower surface of the outer periphery of the dial body, and the upper surface of the inner frame.

The rotational force direction, vertical, horizontal, and horizontal positioning can be done using a setting jig for both parts (this can be done with a guide) when joining both parts.
It is also possible to provide individual convexes and concave portions.

The middle frame is made of plastic material and has elasticity.

The watch body and dial are fixed using the outer flange 1 of the watch body.
7a from the dial side (if this is the case, the installation guide surface 13a of the inner frame should be pressed against the upper surface of the watch mechanism body part (the lower part 13b of the inner frame is made of plastic, so it has elasticity). The groove 13c in the middle frame spreads from this to the outer periphery.
t is engaged.

The inner frame engaged with the watch mechanical body is assembled from below the case, and the back cover 16 is pushed in.

Since the outer circumferential protrusion 13h of the middle frame has elasticity, when it is compressed between the body and the back cover (in the iron radial direction), and the body, middle frame, and back cover are fixed by repulsive force and frictional force, Both can prevent water, sweat, and dirt from entering from the outside.

The height and force direction positioning of the middle frame is such that the shoulder of the middle frame is located at the upper body wall 11.
The lower surface of the outer peripheral protrusion 13h of the inner frame is positioned against the outer peripheral stepped portion 16a+c of the back lid, and there is no vertical play.

In order to further prevent this vertical play (this is the outer peripheral protrusion 13b of the inner frame)
A groove oriented in the horizontal force direction may be inserted 5 tt slightly above to impart elasticity.

The middle frame compression part of the body and back cover is made with grooves in the body to prevent the gap from coming out (as shown in this figure).

There is also a method of deforming and compressing the externally caused protrusion of the inner frame by extending the protrusion of the back cover Q.

The body has a convex shape, and the back cover may have a groove.The force required to remove the back cover can be removed by creating a gap between the bottom surface of the body and the outer circumference of the back cover, and prying this gap open.

Furthermore, the watch mechanism body and the middle frame can be easily removed by expanding the lower part 13b of the middle frame to the outer periphery.

However, after assembling on the side, since the gap between the lower part 13b of the inner frame and the inner wall part 16b of the back cover is set to be small, there is little spread and the watch mechanism body does not come off.

The groove 13c of the middle frame 13 may be provided all around the circumference, or may be provided only partially in the Q direction to facilitate removal.

As mentioned above, the dial body and inner frame are fixed by adhesive,
The inner frame and the watch mechanism are fixed by the engagement between the groove and the collar, the outer periphery of the inner frame is twisted between the body and the back lid, and the position is determined in the height and force direction. It is fixed by pressing against the peripheral protrusion.

The middle frame and the body may be held together by applying the upper face portion 11b+c of the dial plate of the body, or by applying other parts fixed to the body G.

Fixing the dial body and the inner frame is not limited to the method of adhesion.For example, if the inner frame is placed on the outer periphery of the dial plate, heat is applied and caulked so that the flesh of the inner frame extends to the top of the dial body. It may be fixed from G or other fixing structure may be used.

Also, by taking advantage of the characteristics of the inner frame made of plastic material, it is also possible to partially protrude a convex portion downward from the dial body and fix it between the inner frame and the insert HC.

Furthermore, the dial body and the inner frame are integrally molded from plastic material (it is also possible to rub the dial body, and there are restrictions on the appearance due to the material used for the dial body, but it is cheaper to manufacture than the joint Q). You can.

Also, if it is necessary to have versatility between the dial body and the inner frame, O
In this case, instead of fixing both sides, the dial plate, Q, and the legs can be set in the same way as in the conventional structure, and the guide hole and position of the watch mechanism body can be set and then fixed with a dial fixing screw. However, the number of other parts can be reduced, making it cost effective.

This kind of structure (conventionally constructed by rubbing,
The dial holder ring, mechanical fixing spring, back cover gasket, and dial fixing screw are no longer required, and the inner frame can be made cheaper by injection molding using plastic material. This reduces the cost of the dial because there are no feet on the dial, and reduces assembly man-hours by assembling the dial from screw tightening to push-in assembly into the watch mechanism.2 Reduction in assembly man-hours because there is no need for machine fixing springs, dial holder rings, or back cover gaskets. can be achieved.

Also, stones and precious stones that could not be used in the past because they do not require feet on the dial.

Materials such as paper, aluminum, and plastic can be used, and the dial can have a wide variety of appearances.

As mentioned above, the present invention has a middle frame structure that enables a significant cost reduction due to the lower part cost and fewer assembly man-hours.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view of a conventional structure, and FIG. 2 is a partial vertical cross-sectional view showing an embodiment of the present invention. 1.11...Body, 2,12...Dial body, 3...Dial holder ring, 4,13...
・・Middle frame, 5・・・・Machine fixing spring, 6.16・・
... Back cover, 7, 17 ... Watch mechanism body, 8
・・・・・・Female screw for dial plate, 10・・・・・・Back cover.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. The upper surface of the watch mechanical body (the dial supporting part that supports the dial body provided thereon, the engaging part that engages with the outer peripheral collar of the watch mechanical body, and the outer circumferential stage of the back cover) An inner frame structure for a portable watch, characterized in that the inner frame has a pressure section provided between the upper wall of the case and the upper wall of the case, and pressed in the radial direction by the case and the back cover. The middle frame structure of the mobile watch side as set forth in Claim 1 of the Utility Model Registration Claim in which the dial holder and the dial body are fixed. The inner frame structure on the side of the portable watch described in paragraph 1. 4. When the foot is protruded from the dial body and the foot is inserted into the guide hole Q of the watch mechanism body to position and fix the dial, An inner frame structure for a portable watch as set forth in claim 1 of the utility model registration, wherein the inner frame supports the lower surface of the outer periphery of the dial.