CPC G02B 27/646 (2013.01) [G02B 3/14 (2013.01); G02B 26/004 (2013.01); G03B 5/00 (2013.01); G03B 13/36 (2013.01); H02K 11/33 (2016.01); H02K 41/0356 (2013.01); G03B 2205/0007 (2013.01); H02K 2211/03 (2013.01)] | 20 Claims |
1. A voice coil motor, comprising:
a plurality of sub motor parts that is capable of being independently controlled, wherein each of the sub motor parts comprises:
an unmovable part comprising:
a motor base part;
a circuit board coupled to the motor base part; and
a coil on the circuit board and electrically coupled to the circuit board;
a movable part capable of moving along an optical axis direction relative to the unmovable part and comprising:
a magnet disposed opposite to the coil; and
a U-shaped separating magnetic piece that forms a magnetic isolation space accommodating the coil and the circuit board, wherein the U-shaped separating magnetic piece comprises:
an inner side wall, wherein the magnet is coupled on the inner side wall; and
an outer side wall;
a driver circuit part configured to control a moving distance of the movable part; and
a connection elastic piece coupled to a liquid lens and the movable part,
wherein the connection elastic piece is a plate spring,
wherein a lower part of the connection elastic piece is fixedly coupled to the outer side wall,
wherein a first stiffness coefficient of the connection elastic piece in the optical axis direction is greater than a second stiffness coefficient of the connection elastic piece in a direction perpendicular to the optical axis direction, and
wherein the movable part is configured to drive the connection elastic piece to squeeze the liquid lens when a force is applied to the movable part in the optical axis direction.
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