Patent ID: 8632060

Claim:
A bumper, comprising: a supporting member; a base fixedly connected to the supporting member; a connecting arm having a rotating portion rotatably positioned in the supporting member; a resetting assembly, comprising: a resisting member slidably connected to the supporting member; an elastic member configured for producing an elastic force to drive the resisting member to resist the rotating portion of the connecting arm; a flange comprising a connecting portion and a restricting portion formed in the connecting portion; and a wear washer positioned between the flange and the rotating portion, wherein the connecting portion and the base are fixedly connected to opposite ends of the supporting member, the rotating portion is substantially spherical shaped, the restricting portion sleeves on the rotating portion, an inner surface of the restricting portion is a substantially semi-spherical surface shaped corresponding to the rotating portion to engage with the rotating portion, one of the rotating portion and the resisting member defines a receiving groove, the other one of the rotating portion and the resisting member defines a restricting protrusion rotatably engaging in the receiving groove.