Camera module having ball members between inner sides of first and second magnets
A camera module includes a lens module including at least one lens, a housing accommodating the lens module, and a driving magnet including first and second magnets disposed on the lens module at an interval. The lens module is supported by the housing with a ball member interposed therebetween. The ball member includes two ball members disposed between inner sides of the first and second magnets in an optical axis direction. The first and second magnets are both disposed on one surface of the lens module.
1 . A camera module comprising:
a lens module comprising at least one lens;
a housing accommodating the lens module; and
a driving magnet comprising first and second magnets disposed on the lens module at an interval,
wherein the lens module is supported by the housing with a ball member interposed therebetween,
the ball member includes two ball members disposed between inner sides of the first and second magnets in an optical axis direction, and
the first and second magnets are both disposed on one surface of the lens module.
2 . The camera module of claim 1 , further comprising:
a yoke disposed to oppose the driving magnet in a direction perpendicular to the optical axis direction,
wherein at least a portion of the yoke is disposed to overlap the entire first and second magnets of the driving magnet in a direction perpendicular to the optical axis direction.
3 . The camera module of claim 1 , wherein the ball members are movable in a rolling motion.
4 . The camera module of claim 1 , wherein the ball member is fixed to the lens module or the housing to be movable in a sliding motion.
5 . The camera module of claim 1 , wherein two driving coils are disposed to oppose the first and second magnets, respectively.
6 . The camera module of claim 1 , wherein the ball member further includes one ball member disposed on an outer side of the first or second magnet, and three ball members of the ball member are disposed in a triangular shape.
7 . The camera module of claim 6 , further comprising:
a yoke disposed to oppose the driving magnet in a direction perpendicular to the optical axis direction,
wherein a center of attractive force formed between the driving magnet and the yoke is formed inside a triangle formed by the three ball members.
8 . The camera module of claim 1 , wherein the ball member further includes at least one ball member disposed on an outer side of the first or second magnet.
9 . The camera module of claim 8 , wherein
contact points between the ball members and the lens module or the housing form at least three support points, respectively, and
two ball members disposed between the first and second magnets, among the ball members, always form a support point.
10 . The camera module of claim 1 , wherein the lens module has a first accommodation groove having a length in the optical axis direction to accommodate the two ball members between the first and second magnets.
11 . The camera module of claim 10 , wherein the housing has a second accommodation groove at a position corresponding to that of the first accommodation groove.