| 摘要 |
PROBLEM TO BE SOLVED: To obtain a filter for ventilator which can be fixed/removed stably and easily and can provide stabilized feeling after being fixed. SOLUTION: Two projecting pieces 11 of aluminum plate having downward hooked forward end 12 are provided on the upper surface at the upper short side of a filter frame 1. A spiral spring 7 having one end fixed with a stopper 6 of U-shaped cross-section is secured, at the other end thereof, to the intermediate part on the left/right side faces of the filter frame 1. At the time of fixing a filter 10 to a fan 30, the hook 12 at the forward end of the projecting piece 11 is temporarily hooked to a gap 32a between the upper surface of the outer frame 31 of the fan 30 and the wall. Subsequently, the stoppers 6 of the spiral springs 7 on the left/right side faces of the filter frame 1 are picked and engaged simultaneously. According to the structure, the filter is fixed smoothly and stabilized after fixing while improving the appearance. |
