| 摘要 |
PURPOSE:To simplify a filter winding operation and to enable a positive winding operation of the filter to be performed by a method wherein a drawing operation member hunged from a main body of a ventilation fan downwardly is provided and an operation transmitting mechanism for changing over the drawing operation into a rotating operation and transmitting it to a winding roller. CONSTITUTION:If a filter 51 shows a condition to be replaced with a new one, a drawing strap 28 acting as a drawing operation member is pulled downwardly. Then, a rotary plate 26 pulls a stopper part 29 and is rotated. A claw 33 of an one-way clutch 31 causes an upright surface 33a to be engaged with a hole 32 in its rotating direction and transmits a rotating force to a driving gear 25, so that the driving gear 25 is rotated in the same direction. Accordingly, a follower gear 36 engaged with its driving gear 25 is also rotated along with a claw wheel 37 and an engaging member 38 while a stopper 41 is being struck by each of slant surfaces 42b of a claw 42 of the claw wheel 37. Its rotation is transmitted from the engaging element 38 to an engaged body 54; thereby, a winding roller 53 is rotated through a cylinder 57 and then a filter 51 is taken up. |
