The disclosure relates to the field of cycle technologies, and particularly to a wheel and a cycle. The wheel comprises a rim, a tire covering an outer periphery face of the rim, and a friction power device sandwiched between the rim and the tire; wherein the friction power device can produce a frictional current when pressed by the rim and/or the tire.

A bicycle light that is constructed and arranged to be supplied with input electrical power. The power can be supplied by multiple power sources, or not. When there are multiple power sources, the bicycle light includes a circuit that is adapted to deliver power to the light source from any of the power sources. The bicycle light can have an electrical power output, and a circuit that is adapted to deliver power to the light source and the power output.

A bicycle light that is constructed and arranged to be supplied with input electrical power. The power can be supplied by multiple power sources, or not. When there are multiple power sources, the bicycle light includes a circuit that is adapted to deliver power to the light source from any of the power sources. The bicycle light can have an electrical power output, and a circuit that is adapted to deliver power to the light source and the power output.

The present invention relates to a light emitting pedal for a bicycle, wherein the light emitting pedal has been developed so that, when riding a bicycle, the rotating motion of a pedal body relative to a pedal shaft coupled to a crank arm is used to light up LEDs installed on the front and rear surfaces of the pedal body, thereby allowing easy discrimination from the surroundings. In the light emitting pedal for the bicycle, an electricity generating unit is provided in a pedal, which includes the pedal shaft mounted to a bicycle crank arm and the pedal body rotatably coupled to the pedal shaft, and causes an illumination part mounted on the pedal body to emit light. The electricity generating unit is characterized by comprising: a multi-pole magnet in which a plurality of magnets, which have a shape that is radially fragmented from a cylindrical shape and have inner and outer circumferences having different polarities, are bonded by an adhesive to a central portion that is inserted into the pedal body of the pedal shaft, and are mounted and fixed in a cylindrical shape in which different polarities are repeated along an outer circumferential surface; a pair of space portions formed symmetrically on both sides around the center through which the pedal shaft of the pedal body passes; a pair of mounting protrusions protruding into the space portions; a rotation shaft, of which both ends are rotatably mounted to the mounting protrusions; a rotation magnet mounted to the rotation shaft; a coil mounted along an inner edge of the space portions; and an LED light emitting unit connected to the coil and mounted to the front surface or the rear surface of the pedal body.

The present invention relates to a light emitting pedal for a bicycle, wherein the light emitting pedal has been developed so that, when riding a bicycle, the rotating motion of a pedal body relative to a pedal shaft coupled to a crank arm is used to light up LEDs installed on the front and rear surfaces of the pedal body, thereby allowing easy discrimination from the surroundings. In the light emitting pedal for the bicycle, an electricity generating unit is provided in a pedal, which includes the pedal shaft mounted to a bicycle crank arm and the pedal body rotatably coupled to the pedal shaft, and causes an illumination part mounted on the pedal body to emit light. The electricity generating unit is characterized by comprising: a multi-pole magnet in which a plurality of magnets, which have a shape that is radially fragmented from a cylindrical shape and have inner and outer circumferences having different polarities, are bonded by an adhesive to a central portion that is inserted into the pedal body of the pedal shaft, and are mounted and fixed in a cylindrical shape in which different polarities are repeated along an outer circumferential surface; a pair of space portions formed symmetrically on both sides around the center through which the pedal shaft of the pedal body passes; a pair of mounting protrusions protruding into the space portions; a rotation shaft, of which both ends are rotatably mounted to the mounting protrusions; a rotation magnet mounted to the rotation shaft; a coil mounted along an inner edge of the space portions; and an LED light emitting unit connected to the coil and mounted to the front surface or the rear surface of the pedal body.

A crank power measurement system measures one or more of force, torque, power, and velocity of the crank, and includes a crank, two or more strain gauges located on a surface of the crank, and electronics for receiving strain data from the two or more strain gauges and determining at least one or more of bend-strain, shear-strain, and axial strain. A bicycle crank mounted power generator generates power when the bicycle is being ridden by a user, and includes a base ring, with a plurality of magnets, attached to a frame of the bicycle and circling a bottom bracket attached to a crank, a coil system attached to the crank adjacent to the plurality of magnets to generate an output at leads of the coil, and electronics configured to manipulate the output to power an electronic device and/or store the output in a power supply.

A bicycle chain tensioner device is basically provided with a base member, a pulley and an electrical storage unit. The pulley is supported by the base member. The pulley includes a dynamo that generates electrical energy in response to the pulley being rotated by a bicycle chain. The electrical storage unit is disposed on the base member and electrically coupled to the dynamo to store electrical energy generated by the dynamo.

A bicycle chain tensioner device is basically provided with a base member, a pulley and an electrical storage unit. The pulley is supported by the base member. The pulley includes a dynamo that generates electrical energy in response to the pulley being rotated by a bicycle chain. The electrical storage unit is disposed on the base member and electrically coupled to the dynamo to store electrical energy generated by the dynamo.

A bicycle includes a frame formed of various interconnected tubes with a front wheel and a rear wheel mounted thereon. The frame includes a headlight module and taillight module that are each powered by an internal rechargeable battery. A pair of pedals at the lower end of the frame operate an internal generator to automatically recharge the battery whenever the rider is pedaling.

A bicycle includes a frame formed of various interconnected tubes with a front wheel and a rear wheel mounted thereon. The frame includes a headlight module and taillight module that are each powered by an internal rechargeable battery. A pair of pedals at the lower end of the frame operate an internal generator to automatically recharge the battery whenever the rider is pedaling.