| 摘要 |
<p>A flat type vibrating motor capable of providing a large vibration while achieving a reduction in size and eliminating a starting dead center. A ring-shaped stator (4) divided into eight parts in a circumferential direction and magnetized alternately to an N-pole and an S-pole and a rotatable generally sector-shaped rotor (5) opposed and face-to-face to the stator (4) are disposed in a casing (3). Three armature coils (11a, 11b, 11c) each of 60 DEG in a coil winding angle are disposed in the rotor (5), the first and second coils being arranged at an arrangement pitch of 150 DEG and the second and third coils being arranged at an arrangement angle of 60 DEG . A non-magnetic weight member (21) is disposed between the armature coils (11a, 11b), and a commutator board (14) having twelve commutators (10) arranged in juxtaposition with each other thereon in a circumferential direction is fixed on the rotor. A pair of brushes (12) are formed so as to be brought into contact with the commutators (10) at an electrical angle of 135 DEG . <IMAGE></p> |
