Spring box for door handle

摘要

The spring box contains a base piece, a front plate, a back plate, a rotational piece, and a torsion spring. The base piece and the front and back plates have aligned through holes. A radial gap is configured on the rim of the base piece. The rotational piece has a curved sliding element along a section of the circumference. The sliding element has a groove, a weight block configured at one end of the sliding element, and a notch at the other end. The rotation piece is placed in the through hole of the base piece. The two ends of the torsion spring are embedded in the gap and the notch. The rotational and base pieces are sandwiched between the front and back plates. Then, by the weight of the weight block and the resilience of the torsion spring, a door handle is restored to its default position after being turned.

主权项

1. A spring box for a door handle, comprising:
a base piece having a first through hole in the center and a gap at a side connected to said first through hole; a front plate having a second through hole in the center aligning with said first through hole and a curved second limiting slot adjacent to and along an upper section of said second through hole; a back plate having a third through hole in the center aligning with said first through hole, a curved third limiting slot adjacent to and along an upper section of said third through hole, and two corresponding flakes configured on an inner side of said back plate towards a front direction; a rotational piece having an axle with an indentation at a front end and a sliding element on a circumference of said rotational piece, said sliding element having a blocking piece, a groove, a weight block at an end of said sliding element, a notch at another end of said sliding element, and a pin protruding along an axial direction of said rotational piece adjacent to said weight block; and a torsion spring having a first end embedded between said two flakes and a second end in said notch; and wherein said rotation piece is placed in said first through hole; said rotational piece and said base piece are sandwiched between said front and back plates; said two flakes are embedded in said gap; said pin is embedded in one of said second and third limiting slots so that, together with said blocking piece, the rotation of said rotational piece is limited and confined; and wherein said door handle has an axle embedded into said indentation; and, by the weight of said weight block and the resilience of said torsion spring, said door handle is restored to a default position after being turned clockwise or counterclockwise.