| 摘要 |
PURPOSE:To improve the fixing ability by a method wherein -shaped holding springs for fixing within pipes are provided at the ventilating fan main body. CONSTITUTION:The -shaped leaf springs 5 with curled tip for holding pipe are provided at the main body 1. When the leaf springs 5 are fitted to the main body 1 having a main body size Lmm., the minimum inner diameter of pipe, to which said fan can be fitted, it rendered to be L+2h. The dimensions L and h can be determined on the inner diameter of pipe (100mm., 107mm. and the like are available) as standard. The insertion of the fan in the pipe is simple and the holding force is enough strong due to the action of the shape and the curled tips, even if the pipe has the inner diameter different from the one adopted as standard and the pipe material different from the one originally intended. |
