Patent ID: 7883444

Claim:
An exercising device, comprising: a base; a driving unit mounted on the base; and a limit cap mounted between the base and the driving unit to limit the driving unit onto the base; the base has an upper surface and a lower surface; the upper surface of the base is provided with two parallel toothed racks, a first contact switch and a second contact switch; each of the toothed racks has a first end a second end; the first contact switch is disposed between the first ends of the toothed racks; the second contact switch is disposed between the second ends of the toothed racks; the lower surface of the base is provided with an antiskid member; the limit cap is mounted on the upper surface of the base and has a top formed with an elongate slideway to allow a sliding movement of the driving unit; the driving unit is mounted on the upper surface of the base and includes: a housing slidably mounted in and guided by the slideway of the limit cap; a rotation shaft rotatably mounted on the housing and having two opposite ends protruded outward from the housing respectively; a motor mounted in the housing and connected with the rotation shaft to rotate the rotation shaft; two driven gears mounted on and rotated by the two opposite ends of the rotation shaft respectively and meshing with the toothed racks of the base respectively; two handgrips mounted on the housing to move in concert with the housing and protruded outward from the slideway of the limit cap; and a control switch mounted on one of the two handgrips and electrically connected with the motor to turn on/off the motor; each of the two handgrips of the driving unit is parallel with the rotation shaft of the driving unit; when the driving unit touches the first contact switch or the second contact switch of the base, the motor of the driving unit is controlled by the first contact switch or the second contact switch of the base to change a rotation direction of the rotation shaft of the driving unit.