A toy vehicle for children, comprising a vehicle frame (1), a steering rod (4) extending in the vertical direction, and a front wheel component (2) provided at the bottom of the steering rod (4). The vehicle frame (1) comprises a main vehicle frame (1) provided with a seat mechanism (7), a left frame (12) provided at the rear with a left rear wheel component (31), and a right frame (13) provided at the rear with a right rear wheel component (32). The left frame (12) and the right frame (13) respectively are rotatably connected to the rear part of the main vehicle frame (1). The left rear wheel component (31) and the right rear wheel component (32) are omnidirectional wheels. Also provided on the vehicle frame (1) are a driving mechanism used for driving the left frame (12) and the right frame (13) to rotate respectively relative to the main vehicle frame (1) so as to allow the left rear wheel component (31) and the right rear wheel component (32) to approach each other or to move away from each other, and an operating mechanism used for driving the movement of the driving mechanism.

A toy vehicle for children, comprising a vehicle frame (1), a steering rod (4) extending in the vertical direction, and a front wheel component (2) provided at the bottom of the steering rod (4). The vehicle frame (1) comprises a main vehicle frame (1) provided with a seat mechanism (7), a left frame (12) provided at the rear with a left rear wheel component (31), and a right frame (13) provided at the rear with a right rear wheel component (32). The left frame (12) and the right frame (13) respectively are rotatably connected to the rear part of the main vehicle frame (1). The left rear wheel component (31) and the right rear wheel component (32) are omnidirectional wheels. Also provided on the vehicle frame (1) are a driving mechanism used for driving the left frame (12) and the right frame (13) to rotate respectively relative to the main vehicle frame (1) so as to allow the left rear wheel component (31) and the right rear wheel component (32) to approach each other or to move away from each other, and an operating mechanism used for driving the movement of the driving mechanism.

The apparatus comprises a rotary to variable linear converter which functions to steer a pivotable rotatable directional wheel of a vehicle. The converter comprises a driven rotatable cylinder and a rotatable pivotable friction wheel pressed against the surface of the cylinder so that they rotate together. The friction wheel is slidably mounted on guide rods extending parallel to the cylinder surface so that the friction wheel can advance helically along the cylinder if angled relative to the cylinder axis. The friction wheel generates a lateral force which is used to apply torque to the directional wheel to turn it. The orientation of the friction wheel is varied and controlled by a digit-operated control lever operated by a rider of the vehicle.

A sliding method on ice-surface aims at solve the problems of power output and poor durability and the difficulty in large-scale promotion. An ice-surface sliding tool includes a seat board, a U-shaped rod, sliding plates, H-shaped connecting frames, a pushing device, a hand-operated chain wheel and a reversing gear. One end of the upper end surface of the seat board is provided with a backrest. The U-shaped rod is provided on the side wall of the other end of the seat board. The lower end of the seat board is symmetrically provided with two sliding plates in parallel to each other. The sliding plates are connected with the lower end surface of the seat board through the H-shaped connecting frames. The pushing device is rotationally provided between the two H-shaped connecting frames. The hand-operated chain wheel is on the upper end of the U-shaped rod through a support bar.

A sliding method on ice-surface aims at solve the problems of power output and poor durability and the difficulty in large-scale promotion. An ice-surface sliding tool includes a seat board, a U-shaped rod, sliding plates, H-shaped connecting frames, a pushing device, a hand-operated chain wheel and a reversing gear. One end of the upper end surface of the seat board is provided with a backrest. The U-shaped rod is provided on the side wall of the other end of the seat board. The lower end of the seat board is symmetrically provided with two sliding plates in parallel to each other. The sliding plates are connected with the lower end surface of the seat board through the H-shaped connecting frames. The pushing device is rotationally provided between the two H-shaped connecting frames. The hand-operated chain wheel is on the upper end of the U-shaped rod through a support bar.

An exercise machine for a near-elliptical arm movement, comprising at least one manual arm-moving structure system enabling an elliptical movement pivotably connected to a cycling pivot shaft structure at one position thereof, and performs a circular movement, elliptical movement, near-elliptical movement, or unidirectional full-cycle movement; and pivotably connected to a reciprocating pivot shaft structure at another position thereof, or performs a linear or curved bidirectional reciprocating movements under restriction and control of a related guide wheel structure system or guide rail structure system. Other portions of the manual arm-moving structure enabling the elliptical movement perform a near-elliptical movement under the collective action of systems related to the full-cycle movement or the bidirectional reciprocating movement. An arm of a user is also moved in a near-elliptical trajectory by means of a corresponding handle structure directly or indirectly provided on the manual arm-moving structure enabling the elliptical movement.

An assisted spring seat height optimization lift device and method of use thereof is presented herein. The device is generally comprised of a seat frame attached to a scissor lift assembly that can be moved by engaging a releases mechanism attached to a lifting mechanism. The device is used to lift a handcycle user to a height that is manageable to transfer to a wheelchair independently without impeding the functionality of the handcycle.

An assisted spring seat height optimization lift device and method of use thereof is presented herein. The device is generally comprised of a seat frame attached to a scissor lift assembly that can be moved by engaging a releases mechanism attached to a lifting mechanism. The device is used to lift a handcycle user to a height that is manageable to transfer to a wheelchair independently without impeding the functionality of the handcycle.

A Steerable Crank System including a Steerer Base firmly connected to the chassis/mainframe of a machine, said Steerer Base containing and supporting Grooved Cog Wheel situated in-line and parallel to the power driving direction in a manner that allows said Grooved Cog Wheel to rotate around its axis and drive the machine power, said Steerer Base containing and supporting a Fork in a manner that allows said Fork to rotate around its main axis and by that rotation movement it controls the steering, said Fork containing a 2.sup.nd axis supporting and housing a Crank Shaft in a manner that allows said Crank Shaft to rotate around its own axis, on said Crank Shaft attached a Butterfly Connector, said Butterfly Connector coupling together said Crank Shaft and Grooved Cog Wheel.

A Steerable Crank System including a Steerer Base firmly connected to the chassis/mainframe of a machine, said Steerer Base containing and supporting Grooved Cog Wheel situated in-line and parallel to the power driving direction in a manner that allows said Grooved Cog Wheel to rotate around its axis and drive the machine power, said Steerer Base containing and supporting a Fork in a manner that allows said Fork to rotate around its main axis and by that rotation movement it controls the steering, said Fork containing a 2.sup.nd axis supporting and housing a Crank Shaft in a manner that allows said Crank Shaft to rotate around its own axis, on said Crank Shaft attached a Butterfly Connector, said Butterfly Connector coupling together said Crank Shaft and Grooved Cog Wheel.