Patent ID: 7082863

Claim:
A socket adapter structure, comprising a main body, a movable member, an elongated rod, a ball, and an elastic member, wherein: the main body has a stepped configuration comprising a larger portion and a non-circular smaller portion for insertion in a corresponding recess in a socket so that the main body can rotate the socket, a through hole in the larger portion, a ball-receiving hole in the square smaller portion, and an inner wall defining a stepped receiving chamber comprising a larger portion in communication with the through hole, a smaller portion in communication with the ball-receiving hole and a shoulder located between the larger portion and the smaller portion; the movable member is movably mounted in the stepped receiving chamber of the main body, the movable member has a larger portion with an elongated hole aligning with the through hole of the main body and a smaller portion with a stepped face aligning with the ball receiving hole of the main body, the elongated hole of the movable member has a length greater than a diameter of the through hole of the main body, so that the movable member can be pushed further into the stepped receiving chamber of the main body through a determined distance; the elongated rod is extended through the through hole of the main body and the elongated hole of the movable member and protruded outward from the main body, the elongated rod has a length greater than a diameter of the main body to provide a torque to rotate the main body, the elongated rod has a cross-section having a shape substantially matching that of the through hole of the main body, the elongated rod is slidable axially in the elongated hole of the movable member; the ball is mounted in the ball receiving hole of the main body and is rested on the stepped face of the movable member so that it can rub against the wall of the recess in the socket, thus retaining the socket on the main body; and the elastic member is mounted in the stepped receiving chamber of the main body and has a first end urged on the shoulder of the main body and a second end urged on the larger portion of the movable member.