| 摘要 |
The present invention pertains to a protective mechanism for automatic umbrella mainly including a drive unit, a pulley tackle, a spring motor, a clutch, and a clutch spring; wherein, a strand has one end fixed to the pulley tackle and the other end secured to an upper notch of the umbrella, and the spring motor and the clutch are separately mounted on the pulley tackle. Further, between the clutch and the pulley tackle are unidirectional rotor members cooperating with each other. Thus, the drive unit and the clutch spring substantially control the separation and contact of the clutch and the pulley tackle for either releasing the strand and tightening the spring motor while stretching the umbrella or winding the strand in a single direction and loosening the spring motor when collapsing. Therefore, the present invention prevents from striking users by taking off the umbrella stick halfway when manually retracting it.
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