Patent attributes
A dual pole electromagnetically-driven focusing system of a micromotor includes a movable base having an elastic support system on upper and lower sides thereof and an outside configuration in a parallelepiped form having four side surfaces. Two loop coils are respectively fixed to two opposite side surfaces of the slidable base. Two dual-pole magnets are respectively arranged beside the two loop coils in a manner of being opposite to each other in respect of magnetism so that the two loop coils, upon energized, generate acting forces in opposite direction with respect to the two dual-pole magnets. A circuit device is arranged on one side surfaces of the movable base between the two loop coils. Three successive side surfaces of the movable base that are respectively provided with a combination of loop coil and dual-pole magnet, the circuit device, another combination of loop coil and dual-pole magnet, form a U-shaped structure.
