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US 11,768,422 B2Granted
Voice coil motor
AssigneeLG Innotek Co., Ltd.
InventorsSang Ok Park, Seong Min Lee
Life of this patent
Estimating the term…
Abstract
A VCM is disclosed, the motor including a stator including a first driving unit, a rotor arranged inside the stator, including a second driving unit responding to the first driving unit and mounted therein with a lens, a base fixing the stator, and an elastic member coupled to the rotor to float the rotor from the base in a case a driving signal for driving the first and second driving units is not applied to the first and second driving units.
Claims20
A voice coil motor, comprising:
- a base;
- a cover disposed on the base and comprising an upper plate and a lateral plate extending from the upper plate;
- a bobbin disposed in the cover member;
- a magnet disposed between the lateral plate of the cover and the bobbin;
- and
- a coil facing the magnet;
- wherein the bobbin is spaced apart from the base at an initial position when no current is applied to the coil,
- wherein the bobbin is configured to move from the initial position to a close-up focus position in a first direction distancing from the base when a first driving current is applied to the coil,
- wherein the bobbin is configured to move from the initial position to an infinite focus position in a second direction approaching the base when a second driving current is applied to the coil, and
- wherein a first stroke length between the initial position and the close-up focus position is greater than a second stroke length between the initial position and the infinite focus position.
7 more elements
A voice coil motor, comprising:
- a base;
- a cover disposed on the base and comprising an upper plate and a lateral plate extending from the upper plate;
- a bobbin disposed in the cover member;
- and
- a coil and a magnet disposed in the cover and configured to move the bobbin in an optical axis direction,
- wherein the bobbin is spaced apart from the base at an initial position when no current is applied to the coil,
- wherein the bobbin comprises a first stopper configured to contact the upper plate of the cover in a first direction and a second stopper configured to contact the base in a second direction opposite to the first direction, and
- wherein, at the initial position in an optical axis direction, a distance between the first stopper of the bobbin and the upper plate of the cover is greater than a distance between the second stopper of the bobbin and the base.
5 more elements
Dependencies are inferred from the claim text.