Decoration plate and its mfg. method, articles and time-pieces therewith

Abstract

In carving a decorative groove (7) formed in V-shape cross section extending from inside to outside on a dial plate (2) of a timepiece as a decorative plate, the slant angle of an inner slanted side (7A) forming the V-shape of the decorative groove (7) is made gentler than an outer slanted side (7B) at an inner part of the spiral, so that action of light reflected on the flat surface of the dial plate (2) macroscopically becomes similar to the light reflected on a bulging surface to give the central portion of the dial plate (2) a bulging appearance, whereby a three-dimensional effect is provided by the decorative groove (7) even when the dial plate (2) is made of a thin plate, thereby adding depth and a luxurious touch or aspect.

Description

technical field [0001] The present invention relates to a decorative plate having an excellent appearance by cutting grooves for decoration, a manufacturing method thereof, and an ornament and a timepiece using the decorative plate. Background technique [0002] Until now, dials for wristwatches have been manufactured using thin plates such as brass plates with a thickness of 0.4 mm as raw materials in order to suppress their thickness. [0003] Specifically, by punching or cutting the thin plate, the thin plate is formed into a shape corresponding to the design drawing of the main body of the watch, and at the same time, a central hole through which the drive shaft of the driving pointer passes is formed in the center, and then The back is a pre-installation process by welding the legs for fixing the movement. [0004] Then, the surface of the dial that has completed the previous process is ground and polished, and then stamped on the ground and polished surface to form pa...

AI Technical Summary

Problems solved by technology

[0009] However, even if the existing decorative board is provided with the above-mentioned drawing pattern, it lacks a three-dimensional effect because it is flat. It is obvious that this is the result of being made of a thin plate, and there is a problem that cannot give people a sense of thickness and nobility. a feeling of

[0010] Here, it is also conceivable to form the decorative plate into the shape of a convex lens, a concave lens or a Fresnel lens to reflect the three-dimensional effect, but it is not easy to manufacture it from a thin plate because the lens shape will increase the thickness.

[0011] Especially as a decorative plate for watch dials, if the thickness of the dial is increased, it is extremely difficult to achieve due to the constraints of watch design and manufacturing

[0012] In addition, in order to show the three-dimensional effect, it can be considered to use NC (numerical control) engraving machine to make three-dimensional shaping of the thick plate, but as the thickness of the decorative plate increases, the problem of high manufacturing cost will arise.

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