Fully automatic and simplified control structure

Details Fully automatic and simplified control structure Fully automatic and simplified control structure

1994-11-15

1996-01-16

Mai, Lanna

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 24, A45B 2514

Patent

active

054839858

ABSTRACT:
An umbrella control structure for automatic opening and closing is provided. A leaf spring maintains an umbrella closing spring in a compressed state when a control tab is moved upwardly to cause opening of the umbrella. The upward movement of the control tab causes a control tube to be displaced upwardly to release an active strut guide which permits an umbrella unfolding coil spring to cause the umbrella frame members to open outwardly. Subsequent downward displacement of the control tab causes a movable tab to displace the leaf spring. Displacement of the leaf spring releases a slidable inner tube member which releases the umbrella closing spring to cause the umbrella frame members to move inwardly and thereby close the umbrella.

REFERENCES:
patent: 3658077 (1972-04-01), Sato
patent: 5144969 (1992-09-01), Chou et al.
patent: 5224505 (1993-07-01), Wu
patent: 5232004 (1993-08-01), Wu

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