Multiple sliding extension rod

Abstract

A multiple sliding extension rod comprises an ejector pin disposed axially within its one end; a pressing head disposed radially through the wall of the extension rod with its end having an incline extended into the inclined pathway to allow the ejector pin reciprocating during pressing head being pressed and released; the ejector pin further comprising a ball-socket that consists of a first seat and a second seat successively wherein the first seat is deeper than the second seat. When said ejector pin reciprocates, the second seat pushes a retaining ball disposed in the wall of the extension rod upward and protuberant from the external surface of the extension rod; alternatively, the first seat receives the falling retaining ball and lead the retaining ball withdrawn from the external surface of the extension rod.

Dependencies are inferred from the claim text.