Elevating apparatus of an exercise treadmill

A folding and elevating electric exercise treadmill comprising:

• a) a main frame having an inverted U-handrail and two opposing base bars;
• b) a deck having front and rear end portions, the front end portion interposed between the two base bars, and including a running belt mounted around said deck, the deck being movable between a use position and a folded position;
• c) a belt-driving assembly mounted at one end of said deck, including a main motor driving a belt wheel which rotates a drive shaft to move said running belt;
• and,
• d) an elevating folding unit interposed between the two base bars, and including:
• a servomotor driving a gear box which rotates a transmission spindle, said transmission spindle engaging a slide shaft slidably mounted to the base bars such that said slide shaft undergoes forward and backward movement;
• two L-shaped folding bars, each pivotally connected to said deck and one of the two base bars;
• and two lift shafts, each pivotally connected to the slide shaft and to one of the L-shaped folding bars at a location different from the pivotal connection between the L-shaped folding bar and the deck;
• and,
• e) a releasable latching mechanism interposed between the folding bars and the deck whereby the folding bars can be selectively fixedly connected to the deck, whereby, when the folding bars are fixedly connected to the deck, the elevating unit moves the deck between the use and storage positions.