Patent ID: 9378881
Filing Date: 2016-06-28
CPC Classification: B62D,G01L,H01F

Claim Text:
1. A yoke unit comprising: a first yoke with multiple first magnetic pole teeth; a second yoke with multiple second magnetic pole teeth, each of the second magnetic pole teeth being arranged between two adjacent ones of the first magnetic pole teeth, the second yoke being coaxial with the first yoke; and a resin section that makes the first and second yokes integral with each other, the resin section including a recessed part formed in an inner surface of the resin section, the recessed part being arranged between the first magnetic pole tooth and the second magnetic pole tooth, wherein a distance between an outer surface of the resin section in an area where the recessed part is not formed and the center of the yoke unit is smaller than a distance between the outer surface of the resin section in an area where the recessed part is formed and the center of the yoke unit.