| 摘要 |
PROBLEM TO BE SOLVED: To provide a small portable telephone set whose expense effect is high, which can make the best use of the space in a handset, does not require surface fitting parts to a printed board for telephone, and has a sound volume switch assembly. SOLUTION: A sound volume switch assembly 31 fitted in a back casing part 2 is provided with a flexible board 16, having a plurality of conductor patterns and a switch 20, which is fitted to the end part 19 of the flexible board 16 and which can be deformed. Contact pads 24a, 25a and 26a are formed around a hole 18 in the end tab 17 of the flexible board 16. A contact pad is formed around a hole 14 at the upper face of a printed board 3. A holding screw 13a is made to pass through the holes 14 and 18, and the holding screw 13a is fitted to the screw hole 15 of the back casing part 2. Thus, the printed board 3 and the flexible board 16 are fixed to the back casing part 2 in a state, where the mutual contact pads of the end tab 17 and the printed board 3 are connected electrically. |
