| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and lightweight wiper motor including four or more magnets provided in a motor case and a motion converting mechanism provided in a gear case, while reducing sliding loss of a rotating shaft and an increase in heating value, accordingly.SOLUTION: Four magnets 22 are provided in a motor case 21. An inner ring member is provided between an armature 23 and a worm gear 24a of an armature shaft 24. An outer ring member is provided between a gear case 31 and a stopper plate 60. A ball bearing 28 is provided for restricting axial and radial movement of the armature shaft 24, while rotatably supporting the armature shaft 24. In the gear case 31 between an output shaft 33 and a worm wheel 32, a motion converting mechanism 40 is provided for converting the rotating motion of the worm wheel 32 into the oscillating motion of the output shaft 33. |
