Patent ID: 6523441
Filing Date: 2003-02-25
Classification: B25B,Y10T

Abstract:
A switch device of a socket wrench extension, comprising:a connecting shank having a square fitting head whose front end is formed with an axial circular hole for receiving a restoring member and a drive rod therein, a radial hole defined through a surface of the square fitting head for receiving a positioning ball, a front end of the drive rod formed with a step having a tapered face, so that the positioning ball is pushed along the tapered face to expose outward from the radial hole; wherein, a mediate portion of the drive rod is formed with an insertion recess, a radial oblong slot that aligns with the insertion recess is defined in the connecting shank and is communicated with the axial circular hole, a drive block is received in the radial oblong slot, and has a bottom protruded with an insertion block that may be inserted into the insertion recess of the drive rod, the drive block has a top defining a spring recess for receiving a spring and a positioning pin, a control ring is mounted on the connecting shank, an inner wall of the control ring is formed with a groove, so that when the control ring is mounted on the connecting shank, the control ring may be secured on the positioning pin integrally, a through hole is defined in the groove, and has a diameter slightly smaller than that of the positioning pin, so that the through hole may register the positioning pin during a dismantling process.