Patent ID: 7013766
Filing Date: 2006-03-21
Classification: B25B,Y10T

Abstract:
1. An extension structure, comprising: a main body, the main body having a receiving chamber formed therein and a circular shaft hole formed though a peripheral wall thereof in open communication with the receiving chamber; a drive rod movably mounted in the receiving chamber of the main body and having an operation slot formed in an end portion thereof and disposed in aligned relation with the shaft hole of the main body, the drive rod having an oblique guide edge formed on a distal end of the operation slot; an elastic member mounted in the main body and urged between the main body and the drive rod; and a rotation control member rotatably mounted in the shaft hole of the main body and rested on the drive rod, so that the drive rod is moved in the main body responsive to rotation of the rotation control member; said rotation control member including: