A brake handle structure for a bicycle contains: at least one body, at least one rotatory arm, at least one brake lever, at least one angle signal sensor, and at least one power failure sensor. The at least one body includes a connection portion, an extension, and an engagement portion. The at least one rotatory arm includes a pulling segment, a coupling orifice, and a receiving orifice. The at least one brake lever includes a fixing segment connected with at least one electromagnetic clutch which includes a bolt attracted electromagnetically by the at least one electromagnetic clutch after conducting a power, and a defining orifice is defined adjacent to the at least one electromagnetic clutch. The at least one angle signal sensor is configured to sense and send a rotating angle of the rotatable column. The at least one power failure sensor has a movable sensing head.

A control device is configured to control a damping force of a damping device using a difference between a front-rear acceleration of a vehicle main body and a rotational acceleration of a vehicle wheel, the damping device being configured to dampen a force generated between the vehicle main body and the vehicle wheel.

A bicycle part includes a housing and a lid. The housing includes an inner peripheral portion, an outer peripheral portion, an end wall portion and a connecting portion. The outer peripheral portion is spaced radially outward from the inner peripheral portion with respect to a center axis of the enclosed area. The end wall portion interconnects the inner peripheral portion and the outer peripheral portion to at least partly define an internal space. The connecting portion interconnects the inner peripheral portion and the outer peripheral portion. The lid overlies the internal space. The lid is welded to the inner peripheral portion along an inner weld path and the outer peripheral portion along an outer weld path. The lid is further welded to at least part of the connecting portion of the housing a connecting weld path connecting the inner weld path and the outer weld path.

A left and right feet pedaling analysis system is disclosed, comprising a pedaling sensing device and an electronic carrier, wherein the pedaling sensing device includes one or more transmission units and one or more accelerometers which are applied to detect the acceleration change data during pedaling, and the pedaling sensing device or/and the electronic carrier can analyze the signals coming from the accelerometer during riding the bicycle in order to acquire the pedaling rotation number, the ratio of the left and right foot forces as well as the installation direction thereby understanding the pedaling distribution ratio of the left and right foot when riding; as such, it can help improve the pedaling skills and adjust the pedaling force mode so as to reduce the risk of injury caused by excessively unbalanced pedaling asymmetry.

A left and right feet pedaling analysis system is disclosed, comprising a pedaling sensing device and an electronic carrier, wherein the pedaling sensing device includes one or more transmission units and one or more accelerometers which are applied to detect the acceleration change data during pedaling, and the pedaling sensing device or/and the electronic carrier can analyze the signals coming from the accelerometer during riding the bicycle in order to acquire the pedaling rotation number, the ratio of the left and right foot forces as well as the installation direction thereby understanding the pedaling distribution ratio of the left and right foot when riding; as such, it can help improve the pedaling skills and adjust the pedaling force mode so as to reduce the risk of injury caused by excessively unbalanced pedaling asymmetry.

An electric scooter includes: a scooter body; a front fork pivotally arranged on a front side of the scooter body; a front wheel mounted on the front fork; a rear wheel arranged on a rear side of the scooter body; a handlebar including a crossbar and a riser, the crossbar being arranged at an upper end of the riser, and a lower end of the riser being coupled to the front fork; and a left steering light and a right steering light mounted on at least one of the scooter body, the front fork or the handlebar.

An electric scooter includes: a scooter body; a front fork pivotally arranged on a front side of the scooter body; a front wheel mounted on the front fork; a rear wheel arranged on a rear side of the scooter body; a handlebar including a crossbar and a riser, the crossbar being arranged at an upper end of the riser, and a lower end of the riser being coupled to the front fork; and a left steering light and a right steering light mounted on at least one of the scooter body, the front fork or the handlebar.

An electric power generator is provided for a human-powered vehicle. The electric power generator includes an axle, a stator, a rotor and a first electrical cable. The axle has a first axial end, and a second axial end. The stator has a first axial stator-end that faces the first axial end of the axle with respect to the rotational center axis and a second axial stator-end that faces the second axial end of the axle with respect to the rotational center axis. The rotor is rotatably mounted on the axle to rotate around a rotational center axis of the electric power generator. The first electrical cable is electrically connected to the stator on the first axial stator-end of the stator. The first electrical cable extends axially through the stator toward the second axial stator-end of the stator with respect to the rotational center axis.

A human-powered vehicle includes a crank axle, a first rotational body, a wheel, a second rotational body, a transmission body that transmits a driving force between the first rotational body and the second rotational body, a derailleur configured to operate the transmission body to change a transmission ratio, an electric actuator configured to actuate the derailleur, and a motor configured to drive the transmission body. A control device has an electronic controller configured to control the motor and drive the transmission body upon determining the derailleur has been actuated with the electric actuator to change the transmission ratio and a predetermined condition related to pedaling is satisfied. The electronic controller is configured to control the electric actuator so as not to change the transmission ratio until a first condition related to shifting is satisfied in a case where the derailleur is actuated.

A control device includes an electronic controller that controls a motor of a human-powered vehicle. The electronic controller outputs a signal to change a transmission ratio by operating a linking body with a derailleur while driving the linking body with the motor where a first condition related to pedaling is satisfied. The first condition relates to at least one of a pedal state, a human driving force input to the pedal, a crank arm state, a human driving force input to the crank arm, a crank axle angular acceleration, a rotational state of a first rotational body, a tire state, a rotational state of a second rotational body, an operational state of the linking body, an operational state of the derailleur, a rotational state of the motor, an electric energy supplied to the motor, a handlebar state, a saddle state, and positional information of the human-powered vehicle.