| 摘要 |
PROBLEM TO BE SOLVED: To inhibit creaky sounds from being produced between a circuit board and a contact part at a device in which the circuit board is sandwiched by the contact part of a case.SOLUTION: A case 2, in which a circuit board 3 is stored, is formed by connecting an upper case 5 and a lower case 6 with an engagement structure. A rib 13 which contacts with an upper surface of the circuit board 3 is integrally provided at the upper case 5. Elastic support parts 14, each of which cooperates with the rib 13 to sandwich the circuit board 3 in a vertical direction and support the circuit board 3 in the state, are integrally provided at the lower case 6. A protruding part 16 which contacts with a lower surface of the circuit board 3 is provided on an upper surface of each elastic support part 14. Further, an auxiliary contact part 17 which is located near (at the inner side of) the protruding part 16 and has a protruding shape is integrally provided on the upper surface of each elastic support part 14. The auxiliary contact part 17 is separated from the lower surface of the circuit board 3 at normal time and contacts with the lower surface of the circuit board 3 when the case 2 deflects. |
