| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilation fan capable of restricting the deformation of a body frame during screw fastening by improving the intensity of a reinforcement member without increasing a board thickness while facilitating securing the safety.SOLUTION: On a plane part 13 of a reinforcement member 7A, which is fastened on an installation surface of the wall together with a body frame 1 with mounting screws, a flange part 10 is formed to secure a clearance between the body frame 1 and the installation surface of the wall by means of drawing along both sides edge part from the extended end marginal part while a through hole 9 is formed on the drawn part at a position corresponding to an opening 16 of the body frame 1. |
