| 摘要 |
PURPOSE:To facilitate the adjustment of an air flow direction and to reduce the metal mold manufacturing cost and the number of assembling steps by using a sheet assembly formed by alternatively overlapping sheets as an air flow guide member and inserting a pair of connecting pins capable of being held horizontally through connecting pin holes formed on both sides of a first sheet. CONSTITUTION:When the knob portion 7c of an operating member is grasped by fingers or the like and moved vertically, laterally and further slantly from its neutral state, a drive pin 96 makes only a first sheet 17 in the former case slide and both first and second sheets 19 mutually slide in the latter two cases. Further, by the sliding movement of the housing inner wall surface of the second sheet, an air flow guide hole A is directed in a predetermined direction. Upon this occasion, a rear surface retainer 5 assumes a form in which the sheet assembly is held longitudinally between the same and a fixed grill 11. Further, since a pair of connecting pins 7 assume a form in which they constantly slide along vertically long guide slits 19b formed on both sides of the rear surface retainer 5, the horizontal state thereof is maintained, and the maintenance thereof in the horizontal state is performed more positively by a laterally long guide slit 5a and a slide leg 5b on both sides of the rear surface retainer 5.
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