Abstract: A treadmill includes a caterpillar track includes two belts, planks, caster-supporting elements, and casters. Each of the belts is a loop. Each of planks includes two terminal sections each of which is connected to an external face of a corresponding one of the belts. Each of the caster-supporting elements is connected to an internal face of a corresponding one of the belts. Each of the belts includes sections each of which is sandwiched between a corresponding one of the terminal sections of a corresponding one of the planks and a corresponding one of the caster-supporting elements. The casters are supported by the caster-supporting elements.

Abstract: A vibrating apparatus includes a base, a frame, two axles and four connectors. The axles are connected to the base and rotatable synchronously. Each of the axles includes two eccentric portions. Each of the connectors is pivotally connected to the frame at an end and receives one of the eccentric portions of one of the axles at another end. The axles are allowed to pivot the connectors, thereby reciprocating the frame relative to the base.

Abstract: An interconnector includes a plate and two pockets. The plate comprising a top and a bottom for contact with a beam. The pockets are formed on the top of the plate. Each of the pockets includes an opening. The openings of the pockets are located on opposite lateral sides of the plate. The openings allow the pockets to receive two bars in parallel to each other in substantially opposite directions.

Abstract: A wheel is devised for a collapsible bicycle. The wheel includes a rim, a hub, and spokes. The rim, the hub and the spokes are made in one piece. The rim includes a ring extending along a center line and a clincher extending from an external face of the ring. The hub includes a first end, a second end, and a depth measured from the first end to the second end. The spokes extend to the center line of the ring from the first end of the hub so that a middle point of the depth lies in a plane defined by the center line.

Abstract: A collapsible bicycle includes a collapsible tube, a spring-loaded detent, a rod, a hook, and a security element. The collapsible tube includes a first section, a second section, and a hinge for pivotally connecting the first and second sections to each other. The spring-loaded detent is connected to the second section of the collapsible tube and formed with an external end. The rod is connected to the second section of the collapsible tube. The hook is pivotally connected to the first section and formed with a hook engageable with the rod to keep the first and second sections of the collapsible tube coaxial with each other. The security element is pivotally connected to the first section of the collapsible tube and formed with a concave portion for receiving the spring-loaded detent to keep the security element covering the hook, thereby keeping the hook engaged with the rod.

Abstract: An exercise machine is provided with a loading device. The loading device includes a lever, a coupler, a cylinder unit and a driving unit. The lever includes two ends. The first end of the lever is connected to the exercise machine. The coupler is movable along the lever between the first and second ends. The cylinder unit includes an end connected to the exercise machine and another end connected to the coupler. The driving unit includes a threaded sleeve, a threaded rod and a motor. The threaded sleeve is connected to the coupler. The threaded rod is engaged with the threaded sleeve. The motor rotates the threaded rod relative to the threaded sleeve so that the threaded rod moves the coupler via the threaded sleeve.

Abstract: An exercise machine is provided with a loading device. The loading device includes a lever, a coupler, a cylinder unit and a driving unit. The lever includes two ends. The first end of the lever is connected to the exercise machine. The coupler is movable along the lever between the first and second ends. The cylinder unit includes an end connected to the exercise machine and another end connected to the coupler. The driving unit includes a threaded sleeve, a threaded rod and a motor. The threaded sleeve is connected to the coupler. The threaded rod is engaged with the threaded sleeve. The motor rotates the threaded rod relative to the threaded sleeve so that the threaded rod moves the coupler via the threaded sleeve.

Abstract: A climbing exercise machine includes a beam supported on two columns supported on a base. Two handles are movably supported on the columns, respectively. The handles are movable in opposite directions. Two treads are movably supported on the columns, respectively. The treads are movable in opposite directions. An input axle is supported on the columns. The input axle is rotated as the handles and the treads are moved. A transmission case connects the input axle to an output axle. A disc is connected to the output axle. A frame is connected to the beam. A resistance element is supported on the frame. The resistance element includes a magnet. The resistance element is movable relative to the disc to adjust magnetism exerted on the disc by the magnets.

Abstract: A caterpillar treadmill includes a non-rotational axle, a roller, a driver wheel, a follower wheel, two caterpillars, and tread slats. The roller is rotationally supported on the non-rotational axle. The driver wheel includes teeth on an external face, and is connected to the roller so that the driver wheel is rotatable together with the roller. The follower wheel includes teeth on an external face, and is connected to the roller so that the follower wheel is rotatable together with the roller. The first caterpillar is wound on the driver wheel and includes, on an internal face, racks engaged with the teeth of the driver wheel. The second caterpillar is wound on the follower wheel and includes, on an internal face, racks engaged with the teeth of the follower wheel. The tread slats are attached to an external face of the caterpillars.

Abstract: A treadmill includes a frame, a tread assembly and two cushion assemblies. Each of the cushion assemblies includes a supporting element and at least one buffering element. An upper portion of the tread assembly is supported on the supporting element. The buffering element is provided between the supporting element and the frame.

Abstract: A caterpillar treadmill includes a non-rotational axle, a roller, a driver wheel, a follower wheel, two caterpillars, and tread slats. The roller is rotationally supported on the non-rotational axle. The driver wheel includes teeth on an external face, and is connected to the roller so that the driver wheel is rotatable together with the roller. The follower wheel includes teeth on an external face, and is connected to the roller so that the follower wheel is rotatable together with the roller. The first caterpillar is wound on the driver wheel and includes, on an internal face, racks engaged with the teeth of the driver wheel. The second caterpillar is wound on the follower wheel and includes, on an internal face, racks engaged with the teeth of the follower wheel. The tread slats are attached to an external face of the caterpillars.

Abstract: An exercise machine includes a training unit, a transmission unit and an impedance system. The training unit includes a roller. The transmission unit is connected to the roller. The impedance system includes several impedance units adapted for selective connection to the transmission unit so that the selected impedance unit exerts impedance on the training unit. The impedance units exert different values of impedance on the training unit via the transmission unit.

Abstract: A tread assembly includes two belts and many slats. Each belt includes apertures. Each slat includes a rigid element, two threaded bolts and a cushion. The rigid element includes two apertures, an external face, and an internal face in contact with the belts. Each of the threaded bolts includes a middle section and two terminal sections. The middle section is inserted in one of the apertures of the rigid element so that the threaded bolts cannot be rotated relative to the rigid element. The first terminal section is located on the external face of the rigid element. The second terminal section is inserted in one of the aperture of a one of the belts. The cushion includes an internal face in contact with the external face of the rigid element and an external face extending higher than the first external section of each of the threaded bolts.

Abstract: A treadmill includes a frame, a tread assembly and two cushion assemblies. Each of the cushion assemblies includes a supporting element and at least one buffering element. An upper portion of the tread assembly is supported on the supporting element. The buffering element is provided between the supporting element and the frame.

Abstract: A belly-supporting treadmill includes a base, a loop supported on the base, a strut supported on the base and a contact unit connected to the strut above the loop. The contact unit is adapted to contact a user's belly to prevent the user from falling while exercising on the loop.

Abstract: An electric bed includes a basic unit and a lift unit. The basic unit includes a base, a sliding frame supported on the base, a backrest frame pivotally connected to the sliding frame, a headrest frame pivotally connected to the backrest frame, and a restraint including an end pivotally connected to the base and another end pivotally connected to the backrest frame. The backrest frame includes a lug that includes a slot. The lift unit includes a power element pivotally connected to the sliding frame, a rod operatively connected to the power element, a backrest driver pivotally connected to the rod, a headrest driver pivotally connected to the backrest driver, a backrest lever for pivotally connecting the backrest driver to the backrest frame, a roller supported on the backrest lever, and a threaded bolt inserted in the backrest driver and the slot of the lug of the backrest frame.

Abstract: An electric bed includes a basic unit and a lift unit. The basic unit includes a base, a sliding frame, an upper leg-rest frame, a lower leg-rest frame and a crankshaft. The sliding frame is supported on the base. The upper leg-rest frame is pivotally connected to the sliding frame. The lower leg-rest frame is pivotally connected to the upper leg-rest frame, and formed with at least one lug that includes a slot. The crankshaft includes a first crank formed thereon, a second crank formed thereon, an axle inserted in the first crank and the slot, and a caster supported on the axle. The lift unit includes a power element and a rod. The power element is pivotally connected to the sliding frame. The rod includes an end operatively connected to the power element and another end pivotally connected to the second crank.

Abstract: An exercise machine includes a training unit, a transmission unit and an impedance system. The training unit includes a roller. The transmission unit is connected to the roller. The impedance system includes several impedance units adapted for selective connection to the transmission unit so that the selected impedance unit exerts impedance on the training unit. The impedance units exert different values of impedance on the training unit via the transmission unit.

Abstract: A foldable bed includes a first frame and a second frame. The first frame has a first board put thereon. A first connector is connected to the front end of the first frame and has a first pin hole and a first aperture which is located below the first pin hole. The second frame has a second board put thereon. A second connector is connected to the rear end of the second frame and has a second pin hole and a second aperture which is located below the first pin hole. A pivot extends through the first and second apertures to pivotably connect the first frame to the second frame. When the first and second frames are extended. A pin extends through the first and second pin holes.

Abstract: A pedal includes an axle connected with a crank shaft. An axle seat is rotatably connected to the axle and a pedal unit is connected to the axle seat. At least one torque detection sensor is connected to at least one end of the axle seat by the least one fixing unit. When the pedal unit is applied by a force, the force is transferred to the at least one torque detection sensor via the axle seat. The at least one torque detection sensor generates a signal corresponding to the force and the signal is transferred to at least one signal transmitting module. The signal is used to control the output of the assistance system of the electric bike.