Abstract: A curved treadmill has a frame assembly, a handrail assembly, and a belt assembly. The frame assembly has a support frame, two arced guide tracks, two cushions, multiple guide wheels, and multiple positioning wheels. Each arced guide track is concaved downward. The cushions are mounted on the arced guide tracks. The guide wheels are mounted on the support frame. The positioning wheels are mounted between two ends of the support frame. The belt assembly includes two connection belts and multiple pedals. The connection belts are wrapped around the guide wheels, and one side of each connection belt abuts the positioning wheels. The pedals are mounted on the connection belts and optionally abut the cushions. Therefore, with the cushions, impacts may be absorbed and noises may be reduced. Besides, by abutting the positioning wheels, the connection belt may not be distorted sideward, and the noises are reduced further.

Abstract: A curved treadmill has a frame, a handrail assembly, and a belt assembly. The frame has a support frame, two arced guide tracks and multiple guide wheels. The two arced guide tracks are downwardly concave, and the multiple guide wheels are disposed at a front end and a rear end of the support frame. The belt assembly is mounted around the frame and has at least one connection belt mounted around the guide wheels and multiple pedals fixed with the at least one connection belt. The pedals are adjacent and connected to each other, the pedals are covered on an outer side face of each of the at least one connection belts, and each pedal has a plate fixed to the at least one connection belt and multiple bearings mounted on two ends of the plate and selectively abutting against the two arced guide tracks.

Abstract: A curved treadmill has a frame, a handrail assembly, and a belt assembly. The frame has a support frame, two arced guide tracks and multiple guide wheels. The two arced guide tracks are downwardly concave, and the multiple guide wheels are disposed at a front end and a rear end of the support frame. The belt assembly is mounted around the frame and has at least one connection belt mounted around the guide wheels and multiple pedals fixed with the at least one connection belt. The pedals are adjacent and connected to each other, the pedals are covered on an outer side face of each of the at least one connection belts, and each pedal has a plate fixed to the at least one connection belt and multiple bearings mounted on two ends of the plate and selectively abutting against the two arced guide tracks.

Abstract: A desktop liftable platform has a base, a supporting frame, a platform, and a driving device. The base has two side beams and a connecting beam connected to rear ends of the side beams. The supporting frame is connected to the base and has two pivot anus connected to the side beams adjacent to front ends of the side beams. The platform is connected to the pivot arms over the base. The driving device is connected to the base and the supporting frame and has a driving motor, two slide groups, and two swing arms. The driving motor is deposited on the base. The slide groups are connected to and are driven by the driving motor. The swing arms are connected to the pivot arms and the slide groups, and are rotated relative to the base by the driving motor to enable the platform to move relative to the base.