| 摘要 |
PROBLEM TO BE SOLVED: To provide a push button key having a top surface on which arbitrary coloring can be applied, with a cosmetic property hard to degrade, while a display part is easy to be looked at. SOLUTION: A plural number of push button keys 32, made of transparent rubber, are made to stand in parallel rows, and integrally jointed to each other at the neighboring area of their bottom part through basal parts 31. A medium print layer 33 to which, light dispersant is added, is formed to the top surface 32a of the push button keys 32, and a colored print layer 35 is formed on the medium print layer except displaying part 34, and a transparent print layer 36 for protection is formed on the colored print layer. The light from LEDs 41, 42 is made to enter into the push button keys 32 from the side surface of the push button keys 32, and made to pass through the push button keys 32, and made to disperse at the medium print layer 33 when passing through the medium print layer 33 at the displaying part 34, and made to pass through the transparent print layer 36 for protection at the displaying part 34.
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