Voice coil motor and autofocus module having the same
AssigneesLite-On Electronics (Guangzhou) Limited, Lite-On Technology Corporation
InventorsHSIN-YI PAI, CHENG-JIE HE, CHUN-LUNG LIN
Life of this patent
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Abstract
A voice coil motor includes a casing with a receiving space, a plurality of magnetic elements disposed in the receiving space, a carrier movably disposed in the receiving space for carrying a lens unit, a coil wrapped around the carrier, and a resilient member interconnecting the casing and the carrier to seal a gap between the casing and the carrier. The coil interacts with a magnetic field of the magnetic elements when energized for generating a driving force to displace the carrier. The resilient member is movable along with the carrier and is deformed to generate a restoring force that is opposite to the driving force.
Claims14
A voice coil motor comprising:
- a casing defining a receiving space;
- a plurality of magnetic elements disposed in said receiving space and having similar poles facing each other;
- a carrier movably disposed in said receiving space for carrying a lens unit;
- a coil wrapped around an outer peripheral surface of said carrier and spacedly surrounded by said magnetic elements, said coil interacting with a magnetic field of said magnetic elements when energized for generating a driving force to displace said carrier;
- and
- a first resilient member interconnecting said casing and said carrier to seal a gap between said casing and said carrier, said first resilient member being movable along with said carrier and being deformed to generate a restoring force that is opposite to the driving force.
An autofocus module comprising:
- a casing defining a receiving space;
- a plurality of magnetic elements disposed in said receiving space and having similar poles facing each other;
- a lens unit disposed in said receiving space and having an optical axis;
- a coil wrapped around an outer peripheral surface of said lens unit and spacedly surrounded by said magnetic elements, said coil interacting with a magnetic field of said magnetic elements when energized for generating a driving force to displace said carrier along the optical axis;
- and
- a first resilient member interconnecting said casing and said lens unit to seal a gap between said casing and said lens unit, said first resilient member being movable along with said lens unit and being deformed to generate a restoring force that is opposite to the driving force.
Dependencies are inferred from the claim text.