Patent ID: 6979283

Claim:
A locking device for a treadmill having a collapsible treadmill deck and a base assembly to lock the collapsible treadmill deck in a folded position relative to the base assembly, and the locking device comprising: a telescopic tube comprising an outside tube having an exterior periphery, a bottom end pivotally connected to the base assembly and a through hole defined through the exterior periphery; and an inside tube telescopically mounted in the outside tube and having an exterior periphery, a top end pivotally connected to the collapsible treadmill deck and at least one positioning hole defined through the exterior periphery of the inside tube, and each of the at least one positioning holes corresponding to the through hole, wherein each of the at least one positioning hole has an annular edge, an inclined surface defined along the annular edge and at least one slot defined at the annular edge to allow the locking pin to selectively extend into one of the at least one positioning hole; and a lock attached to the exterior periphery of the outside tube, aligned with the through hole and comprising a mounting bracket fastened on the exterior periphery of the outside tube and having a stationary end, a free end and a passage defined through the free end to the stationary end, aligned with the through hole and having an interior periphery; an adjusting knob rotatably and retractably mounted at the free end of the mounting bracket; and a detent assembly movably mounted in the passage and comprising a rotating shaft and a locking pin, the rotating shaft having an exterior surface, an inside end and an outside end, and the locking pin attached to the exterior surface of the rotating shaft at the inside end; wherein the locking pin is selectively extendable into one of the at least one positioning hole to engage the inside tube as the adjusting knob is pushed and rotated.