Electric Device for a Bicycle
OwnerLi-Ho Yaoinventor
Life of this patent
Estimating the term…
Abstract
An electric device for a bicycle has a casing, a pedal shaft, a motor shaft, a rotor assembly, a stator assembly, a gear assembly, a chain wheel and a control unit. Because a normal of the circuit board of the control unit is parallel to the motor shaft, the circuit board can be axially adjacent to a side surface of the rotor assembly to detect the rotor assembly. Thus, one single circuit board can detect the rotor assembly as well as maintain electric connection with other components, thereby saving space and reducing the volume of the casing. As the casing has a reduced volume, interference with the rear wheel can be avoided.
Claims24
An electric device for a bicycle comprising:
- a casing having an inner space;
- a pedal shaft mounted through the casing and having two ends protruding out of the casing;
- a motor shaft mounted pivotally in the casing;
- a rotor assembly mounted in the casing, connected to the motor shaft, and actuating the motor shaft;
- a stator assembly mounted securely in the casing and corresponding to the rotor assembly;
- a gear assembly mounted in the casing, connected to the pedal shaft and the motor shaft, and actuated by the pedal shaft or the motor shaft;
- a chain wheel connected to the gear assembly and actuated by the gear assembly;
- and
- a control unit mounted securely in the casing and having
- a circuit board electrically connected to the stator assembly and having
- a normal parallel to the motor shaft;
- and
- a rotor detecting segment being adjacent to the rotor assembly and detecting the rotor assembly;
- and
- multiple power switch devices electrically connected to the circuit board.
Dependencies are inferred from the claim text.