JPS6456990A - Air direction changing device for electric fan - Google Patents

Abstract

PURPOSE:To avoid the generation of contact noise of an air direction changing plate with a main unit case by tilting the axial center of a supporting cylinder, which pivotally supports the air direction changing plate, in a direction reverse to the direction of tilting the air direction changing plate which is rotated by adapting a drive roller to the titled peripheral surface. CONSTITUTION:An air direction changing plate 4, arranged in the front of a fan in a main unit case 3 housing the motor driven fan, is pivotally supported rotatably by a supporting cylinder 5 fixed to the main unit case 3. The air direction changing plate 4, providing in its peripheral part 4a a draft taper for easily forming a pattern in the time of molding, is rotated by driving a small motor 7 with a roller 6 adapted to this peripheral part 4a. Here because the peripheral part 4a is slightly titled, the air direction changing plate 4 tends to rotate in a surface tilting from a reference surface 3a of the main unit case 3, but copying with this action, the supporting cylinder 5 is formed in a manner wherein its axial center 5b tilts by a predetermined angle in an opposite direction to the roller 6.