An automatic device for opening or closing multi-folding umbrella, comprising:
- an umbrella shaft that contains a lower tube (11), a middle tube (12) with one segment or more segments and a upper tube (13), adapted such that the lower tube (11) is received in the middle tube (12), and the middle tube (12) is in turn received in the upper tube (13), a control handle (9) and an upper nest (2) that are fixed on the bottom of the lower tube (11) and on the top of the upper tube (13) respectively, a lower nest (3) that is sleeved glidingly on the exterior of the upper tube (13), a rib assembly (4) that is centered between the upper nest (2) and the lower nest (3), a spring for closing (5) tied to the rib assembly (4), a raising inner tube (6) that is encased inside of the umbrella shaft, a spring for opening (7) that is slided outside of the raising inner tube (6) but inside of the shaft, a dragline (8) that is used to tense the lower nest (3) and prevent it sliding downwards when the umbrella is open, the dragline (8) is circled on the assembly pulley of the upper nest (2) and lower nest (3), whose one end is fixed on the upper nest (2) and the other end is tied to a step-cone (81) through the raising inner tube (6);
- it is characterized in that:
- the bottom of the handle body (91) of the said control handle (9) is joined fixedly with the bottom of the lower tube (11), a button hole is provided on the sidewall of the upper part of the handle body (91), and a button (92) with a reset spring (925) and a snap convex (924) is installed in the button hole, a rocker that is hinged with the handle body (91) under the button hole and also equipped with the push spring (935) lock or release the step-cone (81) that is tied to the end of the dragline (8), and a movable ring (94) with the lifting spring (942) is around the upper part of the said rocker (93) and the lower part of the lower tube;
- wherein after the umbrella is closed and the shaft is in the state of compression, the snap convex (924) of the said button (92) falls into the locking recess (131) on the lower part of the upper tube (13), the said movable ring (94) is forced downwards by the bottom of the middle tube (12) and staggers with the button (92), and the said rocker (93) locks the step-cone (81) that is tied to the dragline (8);
- when the said button (92) is pressed, it will move inwards but will not touch the rocker (93) and the said snap convex (924) will depart from the locking recess (131) on the lower part of the upper tube (13), and the umbrella will be unfurled under the action of the spring for opening (7), the said step-cone (81) is still locked by the rocker (93) so as to tighten the said dragline (8) to prevent the lower nest (3) from sliding downwards, and the movable ring (94) moves upwards to the position that can be touched by the button (92) under the action of lifting spring (942);
- when the button (92) is pressed again, it will push the movable ring (94) inwards and drive the said rocker (93) to rotate to release the step-cone (81), so the said lower nest (3) loses support and the spring for closing (5) pulls the rib assembly (4) to push the lower nest (3) downwards back to the state of closing umbrella.