| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a motor while assuring an insulation property around a coil thereof. SOLUTION: A stator 20 is provided with resin blocks 24 and 25 molding the upper and lower end faces of a stator core 21, including a coil 23, with BMC resin, and shows a doughnut shape. A central hole 26 of which the internal peripheral surface is flat across the entire is provided. The central hole is press-fitted until the resin block 25 abuts with a step 14 at the final end of a stator press-fitting part 12 for attachment to a bearing holder 10. A shaft 31 of a rotor 30 is supported by bearings 64 and 65 which the bearing holder holds. Since the coil is covered with resin, the safety standard when a coil is exposed between the coil and a rotor disc part 33 as well as between the coil and a motor substrate 2 can be lowered. The outer peripheral surface of the bearing holder is not scraped because the hole edge of the central hole is resin when the stator is press-fitted in the bearing holder, chips do not remain at a step portion and accurate alignment is ensured between the bearing holder and the stator. COPYRIGHT: (C)2010,JPO&INPIT |
