Patent ID: 7639441
Filing Date: 2009-12-29
Classification: H02K

Abstract:
1. A lens module, comprising: at least one lens defining an optical axis; a stationary assembly comprising a first magnetic field generator having a first through hole defined therein, and a plurality of spaced guiding rods provided at the first magnetic field generator around the first through hole, the guiding rods being oriented substantially parallel to the optical axis of the at least one lens, the first magnetic field generator capable of generating a first magnetic field; an elastic member having a second through hole defined therein, a plurality of flexible portions formed in the elastic member adjacent to the second through hole, and a plurality of first engaging holes adjacent to the respective flexible portions, the guiding rods extending through the first engaging holes, the flexible portions each having a free end; and a movable assembly comprising a second magnetic field generator having a third through hole defined therein receiving the at least one lens, and a plurality of guiding holes adjacent to the third through hole, the free ends of the flexible portions coupled to the movable assembly, the guiding rods slidably received in the guiding holes, the second magnetic field generator capable of generating a second magnetic field, wherein a direction of the second magnetic field is selectably one of essentially the same as a direction of the first magnetic field, whereby the second magnetic field generator together with the at least one lens is capable of moving along the guiding rods away from the first magnetic field generator, and essentially opposing the direction of the first magnetic field, whereby the second magnetic field generator together with the at least one lens is capable of moving along the guiding rods toward the first magnetic field generator.