| 摘要 |
<p>PURPOSE:To ensure enough mounting strength by enlarging a catch metal fitting so as to enlarge the contact area with a building material. CONSTITUTION:This tool is equipped with a circular plate frame 1, which is fixed to a building face, a middle frame 9, wherein tools such as a switch 14, a plug socket, etc., are installed freely of mounting and removal, and a catch metal fitting 7, which is installed freely of screwing to the top of the screw 5 inserted from the front of the plate frame 1. A building material is caught with the rear of the plate frame 1 and the front of the catch metal fitting 7 and the plate frame 1 is fixed to a building material by rotating the screw 5. Especially, the catch metal fitting 7 is made large to enlarge the contact area with the building material. Hereby, the contact area with the building material of the catch metal fitting 7 becomes large, and the force applied to the building face is dispersed, so even in case that a cord is pulled out compulsorily, enough strength can be ensured.</p> |
