Patent ID: 8648920

Claim:
An electromagnetically driven device, comprising: a stationary member; a barrel-shaped or column-shaped movable member; a spring member suspending the movable member from the stationary member; a coil set for swinging; and a permanent magnet set; the electromagnetically driven device is characterized in that: the coil set for swinging is mounted on an outer circumference of the movable member and positioned between the movable member and the permanent magnet set while the permanent magnet set is mounted on the stationary member and arranged opposite to the coil set for swinging with spacing, that when an axial direction of the movable member is designated as the Z axis, the configuration of the coil set for swinging including a first through fourth coils is such that the first through fourth coils are wound around axes perpendicular to the Z axis, arranged around the Z axis in numeral sequence and spaced at uniform intervals, and that the permanent magnet set includes a first through fourth magnets, wherein each magnet is arranged between two adjacent sections parallel to the Z axis of two adjacent coils among the first through fourth coils.