Patent ID: 8424423

Claim:
A connecting rod assembly comprising: a connecting element provided with a connecting portion at a first end thereof and a driving portion at a second end thereof, the driving portion being a polygonal column, wherein the driving portion of the connecting element is formed with a threaded hole, a connecting rod is formed on a first end thereof with a threaded portion to be screwed into the threaded hole for fixedly connecting the connecting rod and the connecting element; a pivot element provided at a first end thereof with a connecting pillar formed with a pivot hole, a second end of the pivot element being formed with a driving groove in communication with the pivot hole, the driving groove being structured into a polygonal hole for cooperating with the driving portion of the connecting element, the connecting pillar being formed in an outer surface thereof with a moving hole in communication with the pivot hole, the pivot element being movably engaged onto the driving portion of the connecting element through the driving groove and movable between first and second positions; the connecting rod having the first end thereof fixedly connected to the connecting element, and a second end of the connecting rod disposed in the pivot hole, the connecting rod being formed in an outer surface thereof with an evasion groove, the evasion groove being interiorly formed with an evasion portion and a stopping portion, with the evasion portion deeper than the stopping portion; a spring disposed in the driving groove with both ends thereof pushed against an inner surface of the driving groove and the connecting element; and an engaging element in the form of a ball slidably disposed in the moving hole and located between the moving hole and the evasion groove, the spring biasing the pivot element relative to the connecting element, the spring being compressed when the pivot element is in the second position, the ball being stopped in the stopping portion of the evasion groove and partially protruding out of the moving hole of the pivot element when the pivot element is in the first position, the engaging element fallen in the evasion portion of the evasion groove and not projecting out of the moving hole of the pivot element when the pivot element is in the second position.