| 摘要 |
PROBLEM TO BE SOLVED: To improve the manufacturability of an insulator which is formed by fitting a pair of resin members.SOLUTION: An insulator 42A of an armature has an upper resin member 421A and a lower resin member 422A. The upper resin member and the lower resin member have thin parts 64A, 84A and ribs 65A, 85A that respectively protrude from the thin parts 64A, 84A, and axial positions of the upper resin member and the lower resin member are at least partially overlapped. The ribs improve the strength of each thin part. Thus, when the upper resin member is fitted in the lower resin member, the thin parts of both members are less likely to get damaged. Further, spaces for molding the ribs expand a melting resin passage which is used during molding. Thus, each thin part is molded with high accuracy. |
