Umbrella frame capable of automatic folding and unfolding

Details Umbrella frame capable of automatic folding and unfolding Umbrella frame capable of automatic folding and unfolding

1997-10-27

1998-11-03

Mai, Lanna

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 28, A45B 2514

Patent

active

058294627

ABSTRACT:
An umbrella frame is composed of a shaft, a movable seat, and a locating tube. The movable seat is movably fitted over the shaft and provided at the lower end thereof with a retaining slot engageable and disengageable with a retaining hook located at the lower segment of the shaft. The movable seat is fastened at the top end thereof with one end of a plurality of strut ribs. The locating tube is fastened at the top end thereof with a plurality of ribs which are supported by the strut ribs. The locating tube is further provided in the midsegment thereof with a opening, two lugs, and a pulley mounted pivotally between the two lugs. A cord extends through the pulley such that one end of the cord is fastened with the movable seat, and that another end of the cord is fastened with the bottom end of the shaft. As the retaining hook is actuated by a press button of the shaft, the retaining hook becomes disengaged with the retaining slot of the movable seat so as to enable the cord to pull the movable seat upwards to unfold the umbrella frame.

REFERENCES:
patent: 680661 (1901-08-01), Hunt
patent: 4941494 (1990-07-01), Wu
patent: 5088511 (1992-02-01), Chou et al.
patent: 5174319 (1992-12-01), Chou et al.
patent: 5178174 (1993-01-01), Wu
patent: 5232004 (1993-08-01), Wu
patent: 5564449 (1996-10-01), Lin et al.
patent: 5617889 (1997-04-01), Wu
patent: 5626160 (1997-05-01), Ko

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