Abstract: A table has a stand, a tabletop and a positioning device. The stand is composed of two legs pivotally combined together, and each leg has a top. The tabletop is pivotally attached to the tops of the legs and has a first half board and a second half board pivotally connected with each other and pivotally attached respectively to the tops of the legs. The positioning device is mounted between the half boards of the tabletop to hold the tabletop in an expanded condition. Accordingly, the space of the table for storing or transporting can be effectively reduced with the folded tabletop.

Abstract: A foldable elliptical fitness machine comprises a first frame securely supported on a floor and a second frame for installing an elliptical structure, and the second frame is pivotally coupled to the first frame by a pivoting device, such that the second frame can be rotated with respect to the first frame, wherein the elliptical structure comprises a rotating member having two eccentric pivotal points, and two pedal arms. A central penetrating axle of the rotating member is pivotally coupled onto the second frame, and each eccentric pivotal point is pivotally coupled to the first end of the pedal arm, and each pedal arm includes a footrest for a user to step. If the first end of the pedal arm rotates with the crank, the footrest will move in an elliptic path. With the foregoing structural design, the elliptical structure can be fully folded to improve the convenience of use.

Abstract: A foldable elliptical fitness machine comprises a first frame, a second frame supported by the first frame, and an enabling assembly for enabling the second frame to rotate with respect to the first frame, the first frame securely supported on a floor and the second frame installed an elliptical structure, and the second frame is pivotally coupled to the first frame by a pivoting device, such that the second frame can be rotated with respect to the first frame, wherein the elliptical structure comprises a rotating member having two eccentric. pivotal points, and two pedal arms. A central penetrating axle of the rotating member is pivotally coupled onto the second frame, and each eccentric pivotal point is pivotally coupled to the first end of the pedal arm, and each pedal arm includes a footrest for a user to step. If the first end of the pedal arm rotates with the crank, the footrest will move in an elliptic path.

Abstract: An electric car includes a remote control calling system includes a transmitter and a car, and both of which have an electronic compass for detecting the terrestrial magnetism to obtain an azimuth and calculating the azimuth difference of the two by simple computations. The system automatically controls the direction of the car driving towards a user, and achieves the purposes of simplifying the car structure and facilitating its use.

Abstract: A treadmill includes a base and a frame has a first end thereof pivotably connected to the base and an endless belt is connected to the frame. A guide rod has its axis extending lengthwise of the frame and a fist end of the guide rod is fixed to the base. A second end of the guide rod connected to the base. A sleeve extends through a through hole in a transverse bar of the base 10 and the guide rod is received in the sleeve which is able to move along the guide rod back and forth. A supporting rod has a first end thereof pivotably connected to a pivotal portion on the sleeve and a second end of the supporting rod is pivotably connected to a first pivotal portion on the frame. A securing device is connected to the sleeve so as to secure movement of the sleeve relative to the guide rod so that the frame can be kept at upright position.

Abstract: A height adjustable device is received in the inner tube which is retractably inserted in an outer tube, and includes a base which is fixed in the inner tube and two stop plates are pivotably connected of the base. Two respective first ends of the two stop plates extend through apertures defined through the inner tube and are in contact with two respective insides of the outer tube so as to position the inner tube. A member is movably connected to the base and includes a driving portion for pivoting two respective second ends of the two stop plates. A cable is connected between the movable member and a pivotable member fixed to the inner tube. The pivotable member is pivoted to pull the cable and the two stop plates are pivoted inward so that the inner tube can be freely moved in the outer tube.

Abstract: A treadmill includes a base with two side rails, a frame with two side rods and an endless running belt, two first links, two second links, two third links, a fixing rod which is fixed in-between the two first links with a connection and an actuator is composed of a motor and a motor driven moving part which is pivotally connected to the connection of the fixing rod. Each group of the first links, the second links, the third links and the side rail is structured as a four-bar-link mechanism, which is working to bring up or down the first end of the frame when the actuator is driving the moving part, incline angle of the frame is changing, the purpose of adjusting the inclination of the frame and even folding the frame is simply and efficiently achieved.

Abstract: A treadmill includes a base and a frame having a first end pivotably connected to the base by two parallel first links and two parallel second links. An endless belt is mounted to the frame. Two respective first ends of the two first links are pivotably connected to two respective first pivotal points on the two side rails of the base, and two respective second ends of the two first links are pivotably connected to two respective second pivotal points on two sides of the first end of the frame. Two respective first ends of the two second links are pivotably connected to two respective third pivotal points on the two side rails of the base, and two respective second ends of the two second links are pivotably connected to two respective fourth pivotal points on the two sides of the first end of the frame. The frame can be pivoted relative to the base by the first and second links.

Abstract: A treadmill includes a base and a frame having a first end pivotably connected to the base by two parallel first links and two parallel second links. An endless belt is mounted to the frame. Two respective first ends of the two first links are pivotably connected to two respective first pivotal points on the two side rails of the base, and two respective second ends of the two first links are pivotably connected to two respective second pivotal points on two sides of the first end of the frame. Two respective first ends of the two second links are pivotably connected to two respective third pivotal points on the two side rails of the base, and two respective second ends of the two second links are pivotably connected to two respective fourth pivotal points on the two sides of the first end of the frame. The frame can be pivoted relative to the base by the first and second links.

Abstract: A treadmill includes a treadmill that comprises a base and a belt frame has a first end pivotably connected to the base and a second end of the belt frame is a free end. An endless belt is mounted to the belt frame. A support frame is pivotably connected to the base and is driven by a mechanism so that the support frame can be pivoted relative to the base to lift the first end of the belt frame to adjust the inclination of the belt frame. The support frame may support and lift the whole belt frame to fold the belt frame upright.

Abstract: An elliptical exerciser includes a magnetic resistance mold including a magnetic member and a fly wheel which cuts the magnetic flux to produce magnetic resistance, and a motor driving mold including a motor and several wheels so as to transmit the power from the output shaft of the motor. A clutch device including a lever is operated to set the exerciser to be operated in magnetic resistance mold or the motor driving mold.

Abstract: A height adjustable device is received in the inner tube which is retractably inserted in an outer tube, and includes a base which is fixed in the inner tube and two stop plates are pivotably connected of the base. Two respective first ends of the two stop plates extend through apertures defined through the inner tube and are in contact with two respective insides of the outer tube so as to position the inner tube. A member is movably connected to the base and includes a driving portion for pivoting two respective second ends of the two stop plates. A cable is connected between the movable member and a pivotable member fixed to the inner tube. The pivotable member is pivoted to pull the cable and the two stop plates are pivoted inward so that the inner tube can be freely moved in the outer tube.

Abstract: An electrically driven hub includes an electrical mechanism including an electrical motor and a planetary gear system connected to the electrical mechanism. A first fixed shaft is connected to the stator of the electrical motor and a second fixed shaft is connected to a second end of the stator of the electrical motor. The first and second fixed shafts are connected to the vehicle frame. A one-way clutch is connected between a cover of the hub and the planetary gear system so that the hub is rotated when the planetary gear system is activated by the motor.

Abstract: An electrically driven hub includes an electrical mechanism including an electrical motor and a planetary gear system connected to the electrical mechanism. A first fixed shaft is connected to the stator of the electrical motor and a second fixed shaft is connected to a second end of the stator of the electrical motor. The first and second fixed shafts are connected to the vehicle frame. A one-way clutch is connected between a cover of the hub and the planetary gear system so that the hub is rotated when the planetary gear system is activated by the motor.

Abstract: A wheeled vehicle includes a main frame, and a rear frame detachably mounted on the main frame. The main frame includes a transverse bar and an upright bar. The rear frame includes a crossbar detachably mounted on the transverse bar of the main frame, and a shock-absorber detachably mounted on the upright bar of the main frame. Thus, the rear frame is mounted on and detached from the main frame easily and conveniently, thereby facilitating the user assembling and dismantling the rear frame.

Abstract: The invention relates to a pivoting mechanism for a link rod of an elliptical exerciser having a handle rod and a crank. A pair of handles is arranged on top of the handle rod. A sliding rod with pedals is connected to the crank by a pivoting mechanism while the other end of the sliding rod slides along a sliding base. Moreover, a driving mechanism is linked to a shaft connected with the crank. The pivoting mechanism includes a sleeve with bearings and a projecting collar disposed on the sleeve and having a mounting hole with inner diameter larger than outer diameter of the projecting collar. One end of the crank inserts through the bearings and the projecting collar is fitted into the sliding rod. A fixing bolt is inserted through the sliding rod and the projecting collar so that the projecting collar is movable with the sliding rod.

Abstract: A wheeled vehicle includes a main frame, and a rear frame detachably mounted on the main frame. The main frame includes a transverse bar and an upright bar. The rear frame includes a crossbar detachably mounted on the transverse bar of the main frame, and a shock-absorber detachably mounted on the upright bar of the main frame. Thus, the rear frame is mounted on and detached from the main frame easily and conveniently, thereby facilitating the user assembling and dismantling the rear frame.

Abstract: A treadmill having a folding mechanism includes a base, a support frame pivotally mounted on the base, and a folding mechanism mounted between the base and the support frame. The base is provided with two opposite guide tracks. The folding mechanism includes two opposite first levers, two opposite second levers, two limit levers, and a telescopic control handle. Thus, the folding mechanism is folded and unfolded rapidly, easily and conveniently. In addition, the support frame is folded rapidly and automatically without needing a positioning device, thereby facilitating the user folding the treadmill, and thereby decreasing the cost of fabrication.

Abstract: A treadmill having a folding mechanism includes a base, a support frame pivotally mounted on the base, and a folding mechanism mounted between the base and the support frame. The base is provided with two opposite guide tracks. The folding mechanism includes two opposite first levers, two opposite second levers, two limit levers, and a telescopic control handle. Thus, the folding mechanism is folded and unfolded rapidly, easily and conveniently. In addition, the support frame is folded rapidly and automatically without needing a positioning device, thereby facilitating the user folding the treadmill, and thereby decreasing the cost of fabrication.

Abstract: A jump exerciser includes a base having a mounting portion. A swivel seat includes a first end pivotally connected to the mounting portion. A footboard is rotatably mounted to the second end of the swivel seat. An elastic device has a first end pivotally connected to a mediate portion of the swivel seat and a second end pivotally connected to the mounting portion. A latch is provided to retain the footboard in place during jumping exercise. The latch is released to allow the user to stand on the footboard and twist his/her waist.