Patent ID: 8505448

Claim:
An improved trashcan structure, comprising: an outer can having an accommodating space with an upward opening and accommodating an inner tube that vertically penetrates the outer can, wherein a trash bag is disposed between the outer can and the inner tube and urged by the inner tube against the inner wall of the outer can; a controllable upper cover pivotally installed on the top of the outer can, the center of the upper cover having a connecting hole provided with a stepping part that moves vertically and reciprocally from an original position in the accommodating space when stepped by a user; a base provided at the bottom of the upper cover and around the connecting hole, wherein a first track, a second track, a third track, and a fourth track are disposed around the connecting hole at symmetrical positions of the base; a restoring assembly accommodated in each of the tracks and connecting to the stepping part so as to provide a restoring force for returning the stepping part to its original position after moving to the bottom of the accommodating space; wherein the restoring assembly includes: an elastic element; a transmission element; and a pulley; wherein the pulley is fixed to the corresponding track, a through hole is formed downward on the track near the pulley, one end of the elastic element is fixed to the corresponding track and the other end is connected to the transmission element, the transmission element extends along the track and winds around the pulley then goes downward through the through hole and connects to the stepping part; wherein the first track and the second track are stacked vertically as pairs, and the third track and the fourth track are stacked vertically as pairs, such that the first track and its corresponding elastic element are disposed above the second track and its corresponding elastic element, and the third track and its corresponding elastic element are disposed above the fourth track and its corresponding elastic element.