| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the sense of click of an operation button while preventing the abrasion of printing applied to the back face of an operation button section in a portable terminal. <P>SOLUTION: A resin sheet 10 is uniformly formed with an operation button section 7 expanded to the surface side with thickness which is thicker than that of the periphery, and formed to be depressed in the case of inputting a signal. Printing showing the function of a signal is applied to the back face of the operation button section 7. A protection sheet 11 for protecting printing is arranged on the back face of the resin sheet 10. A dome-shaped movable contact 14 formed with a protrusion 13 for pressurization to be depressed by the operation button section 7 and a substrate 12 for operation having a fixed contact arranged corresponding to the movable contact 14 are arranged at the center just under the operation button section 7 of the back face of the protection sheet 11. The substrate 12 for operation is made to adhere to the metallic board 17. Then, a protection sheet 11 is formed with a through-hole 20 at a position avoiding the protrusion 13 for depression in the neighborhood of the protrusion 13 for depression. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
