Electric power can be generated by using an existing bicycle without impairing the durability of the tire of the bicycle. The bicycle generator device (50) comprises a housing (52) configured to be attached to a frame (18) of a bicycle (10), a generator (54) attached to the housing (52), an annular rotational input member (81) for rotationally driving the generator (54), the rotational input member being rotatably mounted on the housing and positioned around a crank axis line which is a rotational center line of a crankshaft (24) and a crank arm (26) for a pedal of the bicycle, and a connecting member (90, 130) connecting the rotational input member (81) to the crankshaft (24) or the crank arm (26) in a torque transmitting relationship.

Electric power can be generated by using an existing bicycle without impairing the durability of the tire of the bicycle. The bicycle generator device (50) comprises a housing (52) configured to be attached to a frame (18) of a bicycle (10), a generator (54) attached to the housing (52), an annular rotational input member (81) for rotationally driving the generator (54), the rotational input member being rotatably mounted on the housing and positioned around a crank axis line which is a rotational center line of a crankshaft (24) and a crank arm (26) for a pedal of the bicycle, and a connecting member (90, 130) connecting the rotational input member (81) to the crankshaft (24) or the crank arm (26) in a torque transmitting relationship.

According to some embodiments, a manually-powered movable device comprises at least one wheel configured to move when a user operates the device, an electrical energy generating assembly, wherein the electrical energy generating assembly comprises a magnet assembly and a coil assembly, wherein the magnet assembly is configured to move when the at least one wheel is moved, wherein the coil assembly is configured to remain stationary relative to a frame of the device when the at least one wheel is moved, and wherein relative movement between the magnet assembly and the coil assembly generates electrical energy, at least one wire assembly coupled to the electrical energy generating assembly, and at least one output device coupled to the at least one wire assembly and configured to contribute to creation of a desired effect.

A self-powered motorcycle or bicycle includes: a pair of shock absorber frame housings (101), each having a cylindrical hollow inside, a closed upper end portion, a split space formed at a lower end portion, rack gear moving holes (101a) respectively formed in both sides of the outer wall in a longitudinal direction, and self-powered generators (100) respectively mounted on both sides of the outer wall, the pair of shock absorber frame housings being mounted to face each other; a pair of shock absorber frames (102); disc-shaped partitions (102c) fixed in a horizontal direction; anti-rotation protrusions (104a) formed at both sides of the spring guide in a longitudinal direction; and anti-rotation protrusion guide holes (102b) formed at both sides of the shock absorber frame.

Electric power can be generated by using an existing bicycle without impairing the durability of the tire of the bicycle. The bicycle generator device (50) comprises a housing (52) configured to be attached to a frame (18) of a bicycle (10), a generator (54) attached to the housing (52), an annular rotational input member (81) for rotationally driving the generator (54), the rotational input member being rotatably mounted on the housing and positioned around a crank axis line which is a rotational center line of a crankshaft (24) and a crank arm (26) for a pedal of the bicycle, and a connecting member (90, 130) connecting the rotational input member (81) to the crankshaft (24) or the crank arm (26) in a torque transmitting relationship.

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.