Patent ID: 9429750
Filing Date: 2016-08-30
CPC Classification: G02B,G03B

Claim Text:
1. A dust-free lens driving apparatus comprising: (a) a lens holder for holding a lens; (b) a housing; (c) a driving mechanism capable of moving the lens holder; and (d) a film comprising a first contact region, a second contact region, and a buffer region; wherein the first contact region is defined by a first peripheral portion of the film and is used to sealingly attach the film to and around the lens holder, the second contact region is defined by a second peripheral portion of the film and is used to sealingly attach the film to and around a connection portion of the housing, and the buffer region is defined by a remaining region of the film between the first and second contact regions and is used to seal an exit of a gap between the lens holder and the housing; wherein the driving mechanism comprises: (i) at least one elastic leaf spring connecting the lens holder and the housing; (ii) at least one coil; and (iii) at least one permanent magnet operatively coupled with the at least one coil; wherein the dust-free lens driving apparatus further comprises a coil holder which is connected to the lens holder; the first contact region is attached to a lower end of the coil holder which is connected to a lower end of the lens holder, and the second contact region is attached to a magnet holder fixedly mounted on the housing.