Extensible supporting strut

An extensible supporting strut comprising an inner sleeve and an outer sleeve, each end of the supporting strut having a supporting section, the inner sleeve being formed with several engaging holes axially arranged at equal intervals, a base seat being connected between the outer sleeve and the inner sleeve, the base seat having two symmetrically extending sideboards each having a head section, an engaging member and a handle being pivotally disposed between the head sections of the sideboards, a pivoted end of the handle being formed with a stepped protruding push section, the engaging member being pivotally disposed in the handle, the engaging member having a pivoted end formed with a toothed section and a slot, a rear section of the engaging member having a protruding abutting section, a spring being fitted on the abutting section for abutting against inner side of the handle, a middle section of the engaging member having two chucking sections which extend out of the handle, the middle sections of the sideboards being formed with a pair of aligned through holes, a fixing pin being passed through the through holes, a resilient member and a pawl, whereby by means of the resilient force of the resilient member, a claw of the pawl is inserted into the engaging hole of the inner sleeve, two sides of the claw being formed with two shoulder sections which can be pushed by the push section of the handle.