| 摘要 |
PURPOSE:To improve the stability by providing a cage body incorporating a drive motor, a rotary vane and a rotary mechanism while providing an arched section contacting directly against the installing face at least at a portion of the ridge section of the cage body. CONSTITUTION:A fan 20 comprises a cage body 24 incorporating a drive motor 21, a rotary vane 22, a guard section 23, a drive motor and a rotary vane 22. The cage body 24 is rotated by the rotary mechanism where a ring 25 and a frame 26 have such portions as grounding through rotation. Two rolls 35 provided to a center of rotation supporting section 24a are grounded to drive the drive motor 21. Consequently, it will never tilt upon the application of an external force resulting in the improvement of the stability.
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