| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost for display and to extend the design by specifying the structure and the design of the telephone set so as to simply and securely engage and fix split cases. SOLUTION: The telephone set 2 has a case 1 forming an outer side and split into plural parts longitudinally, a thermal contraction tube 3 is fitted to the outside of the engaged case and contracted to a fixed part or all parts of the case 1. Or the contact surface of both ends of the thermal contraction tube 3 to the case 1 is formed to be a flat lane or a projected plane. That is, since a contract force is generated from the thermal contraction tube 3 in the contraction state, the engaged case 1 is tightened and fixed. Thus, the surface of the case 1 with which the both ends of the thermal contraction tube 3 is in contact is closely adhered without a gap to provide water-proof. |
