Patent ID: 7112167

Claim:
An exercise apparatus comprising a foldable leg assembly having movable and immovable legs of which upper ends are coupled together, a mat frame with a mat, a foot supporting unit, and a mat rotating unit for rotating the mat frame wherein the exercise apparatus comprises: a mat rotating member provided on a side of the mat frame and a bearing member provided on the other side of the mat frame; a motor attached to a gear reduction assembly for operating the mat rotating member; a switch for operating the motor; a length adjustable extension member mounted at one end to the mat frame; a foot support means mounted to the other end of the length adjustable member; a skirt placed on and covering the upper ends of the legs to stably support the mat rotating member and the bearing member, wherein an upper portion of the immovable leg is fixed to an inner side of the skirt and an upper portion of the movable leg is supported by a hinge in the other inner side of the skirt thereby defining a generally u-shaped frame wherein the movable leg is moved away from the immovable leg to the limit permitted by the skirt to define an operating configuration and wherein the movable leg is swung towards the immovable leg to define a folded configuration; a reinforcing folding frame horizontally coupled between the movable leg and the immovable leg to reinforce the movable leg and the immovable leg when the legs are in the operating configuration; a locking unit comprising; a locking hole formed on an upper part of the movable leg, and a movable locking protrusion provided on the skirt and spring biased inwardly from the skirt to engage the locking hole, so that the leg assembly can stably stand in its folded configuration by inserting the locking protrusion into the locking hole and wherein the leg assembly can stand in its operating configuration by removing the locking protrusion from the locking hole and spreading apart the moving leg to the limit allowed by the skirt; and a tool insert hole formed through a housing of the mat rotating member to reach the output shaft of the motor of the mat rotating member from an outside, a polygonal countersink formed on an outside end of the shaft of the motor which is exposed to the outside through the tool insert hole; and a manual manipulating means provided in the mat rotating member to rotate manually the output shaft of the motor of the mat rotating member by using a tool which engages the polygonal countersink.