| 摘要 |
<p>PROBLEM TO BE SOLVED: To simultaneously reduce a longitudinal dimension of a head portion, reduce a load added to a vertical oscillation mechanism, and simplify constitution of the vertical oscillation mechanism.SOLUTION: A vertical rotating shaft 34 of a head portion 2 is positioned to be overlapped to a fan motor 23 when observed from a crosswise direction. A vertical oscillation mechanism 24 includes an oscillation motor 31 disposed at a rear part with respect to the fan motor 23, a fixed gear 33 fixed to one of two extended portions of an U-shaped arm 11 and rotatably connected to the fan motor 23 through the shaft 34, and a moving gear realizing vertical rotation of the head portion 2 around the shaft 34 by moving along an outer peripheral portion of the fixed gear 33 in accompany with driving of an oscillation motor 31 in a state of being engaged with the outer peripheral portion of the fixed gear 33.</p> |
