Patent ID: 8757184

Claim:
A multi-folded full-automatic opening-closing umbrella, comprising a frame having springs for folding the umbrella, an umbrella cloth secured on the frame, a middle rod set, an upper nest fixed to an upper end of the middle rod set, a lower nest fitted on the middle rod set and a handle, the frame cooperating with the upper nest and the lower nest; characterized by: the multi-folded full-automatic opening-closing umbrella further comprising an umbrella opening/closing transformation ratio mechanism disposed in the middle rod set and an umbrella opening/closing driving mechanism disposed in the handle and the middle rod set; the middle rod set having at least three sleeves which are respectively an outer sleeve, a middle sleeve and an inner sleeve from top to bottom in sequence; an upper end of the outer sleeve being provided with an outer sleeve plug, a lower end of the outer sleeve being connected with an outer sleeve fixing ring cooperating with the middle sleeve; an upper end of the middle sleeve being provided with a middle sleeve plug having a middle sleeve pulley, a lower end of the middle sleeve being connected with a middle sleeve fixing ring, an outer side of the middle sleeve fixing ring being provided with a middle sleeve fixing ring pulley; a lower end of the inner sleeve being fixed to the handle; the umbrella opening/closing transformation ratio mechanism comprising a lower nest pull rope, a middle sleeve pull rope and an inner sleeve pull rope; one end of the lower nest pull rope being fixed to the middle sleeve plug, another end of the lower nest pull rope passing through the outer sleeve and winding though the outer sleeve pulley to be fixed to the lower nest; one end of the middle sleeve pull rope being fixed to the upper end of the inner sleeve, another end of the middle sleeve pull rope passing through the bottom of the middle sleeve and winding through the middle sleeve fixing ring pulley of the middle sleeve fixing ring and entering the middle sleeve to extend out of the upper end of the middle sleeve and entering the outer sleeve to extend out of the upper end of the outer sleeve to be fixed to the top of the outer sleeve; one end of the inner sleeve pull rope being fixed to the upper end of the inner sleeve, another end of the inner sleeve pull rope passing through the middle sleeve and winding through the middle sleeve pulley of the middle sleeve plug and passing through between the middle sleeve and the outer sleeve to be fixed to the lower end of the outer sleeve; the umbrella opening/closing driving mechanism comprising a driving member connected with the middle sleeve plug and a power source to bring the driving member to move up and down relative to the inner sleeve, the power source being controlled by a button on the handle.