| 摘要 |
<p>PURPOSE:To easily fit the detector without falling nor breaking its printed board at the time of its construction and to simplify the structure and reduce the cost by storing the printed board rotatably on a base fitted on a built surface. CONSTITUTION:A stepped part is provided at the intermediate stage position of the internal wall surface of the base 1, a wire spring 12 is fixed by a fixed rib 13 formed at the stepped part 1a, and one side part of the printed board 2 is fitted to the base 1 by the wire spring 12. Then, when the board 3 is moved along an engagement piece 12a and rotated, the board 3 is opened to the outside of the base 1. In this state, a fixing screw 9 is run through a fitting hole 8 and engaged with the built surface to fit the base 1 on the built surface.</p> |
