To achieve miniaturization, high efficiency, and cost reduction by decreasing only a restoration force without decreasing a propelling force increase effect by an auxiliary magnet.
In this oscillation type motor having a movable part 4 which includes a cylindrical main magnet 5 of which the inner periphery side and the outer periphery side are magnetized to poles different from those of the main magnet 5 and cylindrical auxiliary magnets 6, 7 which are coaxially jointed with both edge parts in an axial direction of the main magnet, respectively, an outer side yoke 1/inner side yoke 3 which are disposed on the outer side and inner side of the movable part 4 through a gap part, and an exciting coil 2 wound and attached to either the outer side yoke 1 or the inner side yoke 3 and two leg parts 11, 12 to flow AC current to the exciting coil 2 and reciprocate the movable part 4 in the axial direction, joint parts 8, 9 between the main magnet 5 and the auxiliary magnets 6, 7 and central parts 11b, 12b of the leg parts 11, 12 are shifted in the axial direction, and a length of the inner side yoke 3 in the axial direction is made approximately equal to a distance between the outer side edge parts 11a and 12a of the leg parts 11, 12.
OSHIMA KEIJI
MIZOGUCHI YOSHINORI
| JP2004056972A | 2004-02-19 |
| WO2007013505A1 | 2007-02-01 |