Importance

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Abstract

A multi-section pulling rod structure, comprising: a retractable pulling rod, a positioning piece, and a plug set. The retractable pulling rod includes a first socket, a second socket, and at least a third socket, sleeved and fixed onto each other through their ends of small diameters, with their bottom ends provided respectively with a first plug, a second plug, and at least a third plug. Positioning piece is disposed inside second socket, and a plurality of positioning holes are provided on positioning piece. A press rod controls action of first plug, and at the same time brings second plug and third plug into action, so as to make steel beads on each plug to position in or detach from holes of each socket, and control steel bead of second plug to position in one of selected positioning holes on positioning piece, hereby reaching the extended height with minute adjustments.

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First Claim