| 摘要 |
PROBLEM TO BE SOLVED: To provide a power tool having a high performance motor, by improving utilization efficiency of a magnetic flux generated from a field, by restraining leakage to the housing outside of the magnetic flux generated from a field coil. SOLUTION: The motor 2, in its turn, the power tool is miniaturized by simultaneously and integrally molding a ferromagnetic substance 1b when molding a housing 2 mainly formed of a nonmagnetic material such as aluminum or resin so that the ferromagnetic substance 1b is arranged around the field of the motor 2. COPYRIGHT: (C)2006,JPO&NCIPI
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