Patent ID: 7777387
Filing Date: 2010-08-17
Classification: H02K,Y10T

Abstract:
1. A laminated core formed with multiple continuous segment core pieces wound in a spiral form by bending connecting portions mutually connecting the adjacent segment core pieces, the connecting portions being formed in an outer peripheral area of the laminated core, while the connecting portions of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces fitted, the laminated core comprising: a) a concave cutout provided in a radial exterior of each connecting portion to dispose a radially expanded portion within an outer circle of the laminated core, the radially expanded portion being formed with each connecting portion expanding radially outward at the time of bending each connecting portion; b) an interior cutout provided in a radial interior of each connecting portion to define a bending position of each connecting portion; and c) a receptacle provided in a radial exterior of each segment core piece to receive an expanded part formed in the thickness direction at the time of bending each connecting portion.