| 摘要 |
PROBLEM TO BE SOLVED: To provide four magnets in a motor case having a substantially oval shape cross section to achieve downsizing and weight reduction.SOLUTION: Four magnets 22 are provided in a motor case 21 having a substantially oval shape cross section. A motor is provided with a ball bearing 28, which includes an inner ring member provided between an armature 23 of an armature shaft 24 and a worm gear 24a and an outer ring member provided between a gear case 31 and a stopper plate 60, rotatably supports the armature shaft 24, and restricts axial and radial movements of the armature shaft 24. A motion conversion mechanism 40 which converts rotary motion of a worm wheel 32 into oscillation motion of an output shaft 33 is provided in an area which is in the gear case 31 and between the output shaft 33 and the worm wheel 32.SELECTED DRAWING: Figure 1 |
