| 摘要 |
PROBLEM TO BE SOLVED: To attain the structure with a water-resistant function, without making a through-hole to a case of a portable telephone set and without using an O-ring. SOLUTION: A knob-sliding recessed part 15 is provided to a front end 11 of a battery container part of a portable telephone set 1. A slide knob 13 is contained slidably in the knob sliding recessed part 15. A slide groove 13b and a spring insert pin 13c are provided to a rear side of the slide knob 13. In the case of containing the slide knob 13 to the knob sliding recessed part 15, a spring 14 is inserted to the spring insert pin 13c and pressed along a slide guide groove 15a of the knob-sliding recessed part 15. Then a projection 15b is pressed into contact with a tail end of the slide knob 13 and pushed further, then the projection 15b enters the slide groove 13b of the slide knob 13. Although the slide knob 13 will be pushed outward by a restoration force of the spring 14, the projection 15b is stopped, while being in press contact with a wall of the slide groove 13b of the slide knob 13. |
