A vehicle includes a main body configured to allow a user to ride on the main body, two driving wheels rotatably coupled to the main body, and a controlling wheel part rotatably coupled to the main body to control a direction of the vehicle in which the main body travels at a specific drive velocity by making contact with a ground surface to rotate about a vertical direction in a three-wheel mode. The main body includes a seat part formed to receive the user in a seated position, a steering part configured to obtain an inclination degree to perform steering based on the inclination degree in which the user seated on the seat part is inclined, in the three-wheel mode, and a post configured to connect the steering part with the seat part.

A vehicle includes a main body configured to allow a user to ride on the main body, two driving wheels rotatably coupled to the main body, and a controlling wheel part rotatably coupled to the main body to control a direction of the vehicle in which the main body travels at a specific drive velocity by making contact with a ground surface to rotate about a vertical direction in a three-wheel mode. The main body includes a seat part formed to receive the user in a seated position, a steering part configured to obtain an inclination degree to perform steering based on the inclination degree in which the user seated on the seat part is inclined, in the three-wheel mode, and a post configured to connect the steering part with the seat part.

A chair seat capable of adjusting a width contains a base, an adjustment assembly, a first sitting portion, a second sitting portion, an adjustable clamp portion, a first guide member, a second guide member, a central shaft, and a screw bolt. The base includes a threaded orifice, multiple locking orifices, a support portion, and a groove. The adjustment assembly includes a first wing and a second wing. The first sitting portion includes a first tilted supporting face. The second sitting portion includes a second tilted supporting face. The adjustable clamp portion includes a guiding orifice. The first guide member includes a first oblique press face and a first connection orifice. The second guide member includes a second oblique press face and a second connection orifice. The central shaft includes an abutting face, multiple fixing orifices, and multiple screws inserting. The screw bolt includes a rotary knob and a non-threaded section.

A bicycle saddle includes a saddle shell with a saddle frame arranged on the lower side thereof. A first saddle cushion is arranged on the upper side of the saddle shell. An intermediate shell is arranged on an upper side of the saddle cushion. On the upper side of the latter, a second cushion element is arranged. The intermediate shell includes at least one recess for improving comfort in particular in the case of a perched sitting position.

A bicycle saddle includes a saddle shell with a saddle frame arranged on the lower side thereof. A first saddle cushion is arranged on the upper side of the saddle shell. An intermediate shell is arranged on an upper side of the saddle cushion. On the upper side of the latter, a second cushion element is arranged. The intermediate shell includes at least one recess for improving comfort in particular in the case of a perched sitting position.

A reciprocating mechanism includes a first connecting element, a crankshaft and a second connecting element. The crankshaft includes a rotation shaft, a first following element and a second following element. The first following element is pivotally disposed on one side of the rotation shaft and movably coupled to the first connecting element. The second following element is pivotally disposed on the other side of the rotation shaft, and a first angle is formed between the first following element and the second following element. The second connecting element is movably coupled to the second following element. The first following element and the second following element are configured to rotate around the rotation shaft so as to be movably coupled to and cause each of the first connecting element and the second connecting element to reciprocate and cyclically pivot along an arc-shaped trajectory.

A bicycle frame includes a front triangle comprising a head tube and a bottom bracket shell, a tension bar comprising a first end and a second end, wherein the first end of the tension bar is pivotably connected to an upper portion of a telescoping seat post assembly, and a first fore pivot assembly at a first reach point. The first reach point is between a reach point of the bottom bracket shell and a reach point of the head tube. The first fore pivot assembly is pivotably connected to the second end of the tension bar. The frame further includes an aft pivot assembly at a second reach point, wherein the second reach point is closer to the reach point of the bottom bracket shell than the first reach point, and wherein the aft pivot assembly is pivotably connected to a lower portion of the telescoping seat post assembly.

A cardan joint steering titanium alloy hand and foot cooperatively operated bicycle capable of being ridden with one leg comprises a bicycle front wheel, a front wheel fork frame, a bicycle rear wheel, a frame body, a seat cushion assembly, a steering handlebar, paired chain wheels and a rear wheel fork frame. The upper end of a front fork rotating shaft and the lower end of an assisting stem are connected through a cardan joint component, symmetric ratchet wheels are provided on the two sides of the bicycle rear wheel, the paired chain wheels are fixed to the two sides of a frame middle shaft, pedal shaft pins are symmetrically provided on the outer sides of the paired chain wheels, and the paired chain wheels and the symmetric ratchet wheels are connected through symmetric chains.

A cardan joint steering titanium alloy hand and foot cooperatively operated bicycle capable of being ridden with one leg comprises a bicycle front wheel, a front wheel fork frame, a bicycle rear wheel, a frame body, a seat cushion assembly, a steering handlebar, paired chain wheels and a rear wheel fork frame. The upper end of a front fork rotating shaft and the lower end of an assisting stem are connected through a cardan joint component, symmetric ratchet wheels are provided on the two sides of the bicycle rear wheel, the paired chain wheels are fixed to the two sides of a frame middle shaft, pedal shaft pins are symmetrically provided on the outer sides of the paired chain wheels, and the paired chain wheels and the symmetric ratchet wheels are connected through symmetric chains.

A straddle type electric vehicle comprises a main frame, a motor unit including an electric motor, and a battery that supplies power to the motor unit. The main frame includes a left and right pair of portions. The motor unit is disposed overlapping the main frame in a side view of the vehicle. A motor shaft of the electric motor is disposed above the pivot shaft and rearward in the vehicle longitudinal direction.