Voice coil motor
AssigneeLG Innotek Co., Ltd.
InventorsSeungki Kim, Kyoungho Yoo
Life of this patent
Estimating the term…
Abstract
Disclosed is a voice coil motor, the motor including a rotor having a cylindrical bobbin that has a support block protruding from an upper end of an outer circumference thereof and a coil block that is coupled to the outer circumference of the bobbin in a direction from a lower surface to an upper surface of the bobbin and is supported by the support block, a stator having a magnet facing the coil block and a yoke holding the magnet, elastic members coupled to upper and lower surfaces of the bobbin, respectively, a base supporting the stator and the elastic members, and a foreign substance inflow-prevention portion formed on an upper surface of the base in such a way as to protrude around an opening formed in a central portion of the base in a shape of a closed loop.
Claims23
A voice coil motor, comprising:
- a base;
- a bobbin on the base;
- a coil block coupled to an outer circumference of the bobbin;
- a magnet facing the coil block;
- a yoke fixing the magnet;
- a lower elastic member coupled to a lower surface of the bobbin;
- and
- a housing including a top plate that covers the yoke and has an opening to expose the bobbin to an outside thereof, and a side plate that extends from the top plate of the housing towards the base,
- wherein the bobbin includes a plurality of anti-rotation portions protruding upwardly from an upper surface of the bobbin,
- wherein a pair of recess parts are disposed between each anti-rotation portion and an adjacent anti-rotation portion, and
- wherein guide recesses are formed in the housing at positions corresponding to the respective anti-rotation portions to inhibit rotation of the bobbin, with a predetermined gap being formed between each of the guide recesses and the corresponding anti-rotation portion.
A voice coil motor, comprising:
- a rotor including a bobbin and a coil block coupled to an outer circumference of the bobbin;
- a stator including a magnet facing the coil block and a yoke holding the magnet;
- a lower elastic member coupled to a lower surface of the bobbin;
- a base supporting and the lower elastic member;
- and
- a housing including a top plate that covers the yoke and has an opening to expose the bobbin to an outside thereof, and a side plate that extends from the top plate of the housing towards the base,
- wherein the bobbin includes a support block protruding from an upper end of the outer circumference of the bobbin, and the coil block is fitted over the outer circumference of the bobbin in a direction from the lower surface to an upper surface of the bobbin to be supported by the support block,
- wherein the support block comprises a plurality of anti-rotation portions arranged at regular intervals along an upper surface of the support block,
- wherein the support block further comprises a plurality of recess parts including a pair of recess parts disposed between each anti-rotation portion and an adjacent anti-rotation portion, and
- wherein guide recesses are formed in the top plate of the housing at positions corresponding to the respective anti-rotation portions to inhibit rotation of the bobbin, with a predetermined gap being formed between each of the guide recesses and the corresponding anti-rotation portion.
A voice coil motor, comprising:
- a rotor including a bobbin and a coil block coupled to an outer circumference of the bobbin;
- a stator including a magnet facing the coil block and a yoke holding the magnet;
- elastic members including an upper elastic member coupled to an upper surface of the bobbin and supported by the yoke, and a lower elastic member coupled to a lower surface opposite to the upper surface of the bobbin;
- a base supporting the rotor, the stator and the elastic members;
- and
- a housing including a top plate that covers the yoke and has an opening to expose the bobbin to an outside thereof, and a side plate that extends from the top plate of the housing towards the base,
- wherein a foreign substance inflow-prevention portion protrudes around an opening formed in a central portion of the base, and the bobbin includes a support block protruding from the outer circumference of the bobbin adjacent to the upper surface thereof to support the coil block,
- wherein the support block comprises a plurality of anti-rotation portions arranged at regular intervals along an upper surface of the support block,
- wherein the support block further comprises a plurality of recess parts including a pair of recess parts disposed between each anti-rotation portion and an adjacent anti-rotation portion, and
- wherein the housing comprises at least one stopper, each stopper protruding from an inner surface of the top plate of the housing and disposed on a recess part of the plurality of recess parts.
Dependencies are inferred from the claim text.