Patent ID: 7398711
Filing Date: 2008-07-15
Classification: B25B,B25G

Abstract:
1. A multi-function extension rod having an associated socket-coupling and angle-adjusting mechanism, primarily comprising: the extension rod, comprising a joint segment integrately formed on the extension rod, a socket-coupling segment pivotally connected with the joint segment; wherein the end of the coupling segment adjacent to the joint segment is defined as a pivoting end while the opposite end of the coupling segment is defined as a coupling end for receiving a socket tool sleeved thereon a pin hole passing through the coupling segment along the axis thereof and comprising a first hole section with a first hole diameter near the coupling end and a second hole section with a second hole diameter near the pivoting end, wherein the second hole diameter is greater than the first hole diameter so that an annular first retaining surface is formed at the border between the first section and the second section and facing the second section; an operating pin, which is sized to be snugly and slidably receive in the pin hole and having a first pin section with a first pin diameter near the coupling end and a second pin section with a second pin diameter near the joint segment, wherein the second pin diameter is greater than the first pin diameter, so that an annular second retaining surface is formed at the border between the first section and the second section and facing the first section; a socket tool coupling assembly, equipped on the first section of the operating pin capable of jutting out from or retracting from the surface of the coupling end of the socket-coupling segment for coupling or releasing a socket tool and; a joint block coupling assembly, equipped on the second section of the operating pin capable of jutting out from or retracting from the surface of the joint segment for coupling or releasing the joint segment of the extension rod and; a spring, sheathing around the first pin section and positioned between the first retaining surface of the pin hole and the second retaining surface of the operating pin within the pin hole; a pressing-head hole extending from the surface of the socket-coupling segment and communicating with the first section of the pin hole; and a pressing head settled in the pressing-head hole with its one end appearing at the surface of the socket-coupling segment and with the other end mechanically connected with the first section of the pin hole; whereby, when the pressing head is not pressed and the spring is at a released position thereof, the distance between the first retaining surface of the pin hole and the second retaining surface of the operating pin is relatively longer and the socket tool coupling assembly juts out from the surface of the coupling end while the joint block coupling assembly juts out from the surface of the pivoting end, and when the pressing head is pressed, the operating pin moves toward the coupling end and the second retaining surface approaches the first retaining surface so as to make the spring be at a compressed position thereof so that the socket tool coupling assembly retracts from the surface of the coupling end while the joint block coupling assembly retracts from the surface of the pivoting end.