Patent ID: 11958567
Assignee: MOBILETRON ELECTRONICS CO., LTD
Field: Transport (Mechanical engineering)
Classification: CPC B  G  H | IPC B  G  H

Claim 3:
4. The coaxial mid-drive power device as claimed in claim 1, wherein
the rotary base has a cylindrical portion;
the cylindrical portion fits around the crank spindle for fixing;
the ring portion is engaged around a periphery of the cylindrical portion;
the circuit board is a circuit board that is annular and fits around the periphery of the cylindrical portion;
a through opening penetrates through the cylindrical portion; an opening communicating with the through opening penetrates through the ring portion;
an electric wire is connected between the circuit board and the strain gauge;
the electric wire extends outward from the through opening to the opening to be electrically connected to the circuit board.