Patent ID: 7097595

Claim:
A fold-up mechanism for an electric treadmill, comprising: a) two inverted T-bases each having a middle bar extending upwardly from the middle of a base plate thereof; b) a main frame pivotally interposed between both middle bars of the inverted T-bases, the main frame having two side bars defining a continuous moving belt movably installed between a rear and a front roller, the rear roller being driven via a transmission belt by a motor while the front roller is brought into rotation via the continuous moving belt; c) a lifting motor fixedly positioned under the main frame between the inverted T-bases, the lifting motor having an output shaft coupled to a transmission spindle for an in-place rotation; d) a slide tube having a female threaded hole for threadedly mounting the slide tube on the transmission spindle; e) a lifting rod pivotally coupled to a rear end of the slide tube, an opposing end of the lifting rod being attached to a front cross bar, two handrails being extended upwardly from both opposing sides of the front cross bar; f) a telescopic unit includes a sleeve telescopically mounted thereon, the telescopic unit having a first end and a second end, the first and the second end thereof being pivotally attached to a first transverse member and the rear end of the slide tube, respectively; g) a pull rod having a first end and a second end, the first and the second end thereof being pivotally attached to a second transverse member and the rear end of the lifting rod, respectively, whereby, when the lifting motor comes into operation to impart motion of the transmission spindle for an in-place rotation, the slide tube undergoes a reciprocating displacement, thereby bringing the main frame in a tilted and a fold-up position.