| 摘要 |
PROBLEM TO BE SOLVED: To prevent warpage of a circuit board, damage in electronic parts and peeling off of the electronic parts from the circuit boards caused by depressing operations of the operation keys. SOLUTION: An operation key unit 31 is provided with an operation key 4 that is energized outward from inside of a cabinet 2, and a switching pattern 11b formed on a surface 11a of the circuit board 11 arranged inside the cabinet 2 opposing to the operation key 4, while the operation key 4 is equipped with a key body 15 that is exposed outward from the cabinet 2, a conductive part 23 that has conductivity and is deployed in the opposing face 15b side of the key body 15 opposing to the switching pattern 11b, and that is conducted with the switching pattern 11b to let the switching pattern 11b be conductive when the key body 15 is depressed toward inside of the cabinet 2, and an elastic body 17 that is elastically deformable and arranged between the key body 15 and the conductive part 23. COPYRIGHT: (C)2006,JPO&NCIPI
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