| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilating fan wherein there is continuously kept a function of preventing a shutter from falling even when a ventilating fan is burned, and the number of parts and the number of assembling processes are reduced. SOLUTION: There is provided a mount screw 12 which is screwed in a screw hole 13 provided in a bush 10 in the shape wherein the mount screw is inserted into the bush 10 provided over a shutter hole formed at support points of opening and closing of a plurality of shutters provide on a frame freely to open and close. By supporting the shutter through the bush 10 with the aid of the mount screw 12 freely to open and close, the number of parts and the number of assembling processes are reduced while keeping a function of preventing the shutter from a falling even when the ventilating fan is burned. |
