JPS6236545B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite polished brittle dial for a portable watch using a brittle material such as precious stone, glass, or ceramic.

Luxury dress-type watch dials are often made of precious stones such as tiger eye stone, onyx, lapis lazuli, glass, or brittle plates such as ceramics, which emphasize the beauty of the mottling of natural stones and the surface luster of polished surfaces. Their beauty has increased the value of watches.

Conventionally, these high-grade dials were made by drilling a center hole in a cut-out brittle piece, then grinding the outer shape, wrapping the surface, and then attaching a mounting plate with two legs to fix it to the watch body. It was then glued onto the paper, and the letters were printed on. Figure 1 shows a sketch. A dial using the above-mentioned brittle veneer plate can create a more luxurious mobile watch than an ordinary metal dial due to the beauty of the natural stone's mottling and polished surface. However, because it was not suitable for finishes other than mirror surfaces, it could be said that there was a limit to expanding the variety and realizing interesting designs.

The present invention aims to overcome the above-mentioned limitations, expand the variety of dial plates using brittle plate pieces, freely combine various brittle plate pieces, and enable a wide range of dial designs.

The composite polished brittle dial plate for a portable watch of the present invention has legs that are attached to the mechanical body of the portable watch, and a dial plate having a plurality of brittle plate pieces selected from precious stones, glass, ceramics, etc. adhered to the surface. , a composite polished brittle plate whose surfaces are simultaneously polished after the end surfaces of the plurality of brittle plate pieces are filled with an epoxy transparent adhesive without any gaps, bonded and fixed; and a mounting plate to which the composite polished brittle plate is adhered.

Various embodiments of a composite polished dial plate according to the present invention, in which a composite polished brittle plate made of a combination of two or more types of brittle plate pieces is bonded onto a mounting plate, are shown in FIGS. 2 to 6. FIG. 2 shows an example in which separate brittle plate pieces are arranged on the inner circumferential portion and the outer circumferential portion, and FIG. 3 is the same.

FIGS. 4 and 5 show examples in which other brittle plate pieces are arranged vertically or diagonally. Figure 6 is an example in which brittle plate pieces that serve as marks are arranged at the character positions on the dial, and black onyx is placed on the other parts of 1.
Placing opal on the 2nd and 3rd marks creates a very dressy and high-class dial. In this case, it is necessary that the surface of the composite brittle plate piece be polished at the same time, so that the light from the light source is reflected beautifully and is suitable for a high-class dial plate. Furthermore, if there is a gap between the brittle plate pieces 1, 2, and 3, the reflected light from the light source will be intermittent, resulting in a rough image. It is necessary that this gap be filled with adhesive and that the surface of the bonded joint be polished at the same time as the brittle plate pieces.

In terms of manufacturing method, first, the hollowing out of the brittle plate is done by
Ultrasonic processing that takes advantage of the brittleness of the material or wire cutting processing. Further, it is desirable that the external shape of the joint be made as precise as possible by grinding, ultrasonic processing, or the like. The above-mentioned shaping process must be performed on the brittle plate piece after it has been thickened, and a polishing allowance must be left for the finished thickness.

Shaped brittle plate pieces 1, 2 or 1, 2,
3 are adhered to each other on the end surfaces (side surfaces) using transparent epoxy adhesive A without any gaps. Further, the bonded and fixed brittle plate pieces 1, 2 or the composite brittle plate consisting of the brittle plate pieces 1, 2, 3 are adhesively fixed to the polishing guide plate by adhesive B.
In this state, the brittle plate pieces 1, 2 or 1, 2, 3 are bonded and fixed to each other with the adhesive, and
The surface of the composite brittle plate filled with the adhesive without any gaps is simultaneously polished. The edge surface adhesive A is also polished at the same time. After the polishing process is completed, the adhesive B part is peeled off from the polishing guide plate, and only the adhesive B is washed away to complete the composite polished brittle plate. Adhesive A is preferably a highly transparent and high-strength adhesive such as epoxy, and adhesive B is easily dissolved in alcohol such as pine tar, and at that time adhesive A is suitable.
It is important that the material does not deteriorate. The composite polished brittle plate obtained by polishing in this manner reflects the light from the light source at the same angle and has no gaps at the joints. The surface opposite to the polished surface of the composite polished brittle plate is adhered to the mounting plate with two legs, and printing or the like is applied to complete the composite polished dial plate for a mobile watch according to the claims of this patent. do.

Examples of brittle plates include the aforementioned tiger eye stone, onyx,
In addition to lapis lazuli, it can be applied to various combinations of other precious stones such as sapphire, turquoise, Tokachi stone, opal, malachite, purple goldstone, brown goldstone, and jade, as well as glass and ceramics.

According to the present invention, (1) the brittle plate pieces are filled, bonded and fixed without any gaps with a transparent epoxy adhesive that can bond the brittle plate pieces together with extremely little deterioration and the strongest bonding; In composite polished brittle plates whose surfaces are later polished at the same time, since the adhesive is transparent, the division of the bonded boundary by the adhesive is not emphasized, and the bonded state is extremely natural, without any abnormality. In addition, since the epoxy adhesive has a high hardness, even if the composite brittle plate is polished at the same time, the composite polished brittle plate is extremely smooth, and it looks as if it were an original single piece. It is possible to provide a luxurious dial appearance with a finish similar to natural stone.

Furthermore, no matter what shape the brittle plate is,
The polished surface of the composite polished brittle plate can always have a uniform flat surface without unevenness, and the range of combinations of brittle plate pieces can be expanded, allowing for an extremely wide variety of designs.

(2) After joining and fixing the brittle plate pieces, they are pasted on a polishing guide plate with an adhesive such as pine resin, polished, and then washed to create letters with the clean composite polished brittle plate adhered to them. Since it is a plate, for example, compared to a case that has been glued to a mounting plate attached to a watch mechanical body in advance and then polished, abrasives, oils, etc. can penetrate between the mounting plate and the composite polished brittle plate. or remain in the surrounding area, or damage the mounting plate when cleaning.
Also, since the adhesive on the mounting plate is not damaged, a composite polished brittle dial plate with stable adhesive strength can be provided. It has the following effects.

[Brief explanation of the drawing]

FIG. 1 is a sketch of a conventional brittle dial. Second
6 to 6 are plan views of embodiments according to the present invention. In the figure, numerals 1, 2, and 3 indicate brittle pieces according to the present invention.

Claims (1)

[Scope of Claims] 1. A dial plate having legs that are attached to a mechanical body of a portable watch and having a plurality of brittle plate pieces selected from precious stones, glass, ceramics, etc. adhered to the surface, comprising: A composite polished brittle plate whose end surfaces are filled with epoxy transparent adhesive without any gaps, bonded and fixed, and whose surfaces are simultaneously polished;
A composite polished brittle dial plate for a mobile watch, comprising a mounting plate integrally provided with the feet and to the surface of which the composite polished brittle plate is adhered.