The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings, in which:
The thin film layer 10 can be a plastic sheet or a plastic film that is made of a transparent plastic material. The thin film layer 10 is a printing film layer that has a plurality of patterns, symbols, words or numerals formed thereon. Moreover, the thin film layer 10 has a thickness D is between 0.05˜0.4 mm.
Furthermore, the protective layer 20 is disposed on a top side of the thin film layer 10, and the protective layer 20 can be a wear-resistant resin film or printing ink film. Moreover, the stripe layer 30 is disposed on a bottom side of the thin film layer 10, and the stripe layer 30 has a plurality of regular or irregular stripes formed thereon. In addition, the flexible layer 40 is disposed on a bottom side of the stripe layer 30, and the flexible layer 40 can be made of a flexible rubber material or flexible plastic material.
The projected bodies 60 can be a plurality of patterns, symbols, words or numerals respectively, and the projected bodies 60 are disposed on a top side of the thin film layer 10 respectively. Moreover, the protective layer 70 is disposed on the thin film layer 10 and the projected bodies 60, and the protective layer 70 can be a wear-resistant resin film or printing ink film. The stripe layer 30 is disposed on a bottom side of the thin film layer 10, and the flexible layer 40 is disposed on a bottom side of the stripe layer 30.
In conclusion, the thin key structure is made of a complex material that has different materials and color, and is formed integratedly via a way of an extrusion molding. Hence, the appearance of the key structure has a multi-layer variation and has a good reliability. The present invention does not need another attachment process, and can reduce the using numbers of mold and tool. In other words, the thin key structure of the present invention can be manufactured via an apparatus only. Hence, the present invention can reduce cost.
Although the present invention has been described with reference to the preferred embodiments thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.