LENS DRIVING APPARATUS

• US 20110051264A1
• Filed: 10/22/2010
• Published: 03/03/2011
• Est. Priority Date: 11/23/2006
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kim, Ji Hoon
• Granted Patent: US 8,451,553 B2
• Time in Patent Office: Days
• US Class Current: 359/822
• CPC Class Codes: G02B 27/0006 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation G02B1/18 takes precedence; cleaning in general B08B
• CPC Class Codes: G02B 7/023 permitting adjustment
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: G03B 3/10 Power-operated focusing
• CPC Class Codes: G11B 7/0933 Details of stationary parts
• CPC Class Codes: G11B 7/0935 Details of the moving parts
• CPC Class Codes: H02K 41/0356 moving along a straight path

Abstract

Disclosed is a lens driving apparatus. The lens driving apparatus comprises a base, a yoke coupled to the base, having an upper surface formed with a hole, a closed side surface, and an opened bottom surface, a bobbin movably installed in an inner portion of the yoke, a lens module coupled to the bobbin to go in and out the hole according to movement of the bobbin, a magnet fixed to an inner portion of the yoke, a coil fixed to an outer portion of the bobbin while facing the magnets, and springs coupled to the bobbin to provide restoration force to the bobbin.

Claims

1. A lens driving apparatus comprising:

a base;

a yoke coupled to the base;

a bobbin movably disposed in an inner portion of the yoke;

magnets disposed in the yoke;

a coil fixed to an outer portion of the bobbin while facing the magnets; and

springs coupled to the bobbin to provide restoration force to the bobbin,

wherein the springs comprise an upper spring coupled to an upper portion of the bobbin and a lower spring coupled to a lower portion of the bobbin, and

wherein the coil has an octagonal shape.

2. The lens driving apparatus as claimed in claim 1, wherein the base has locking protrusions and the yoke has locking holes into which the locking protrusions are inserted.

3. The lens driving apparatus as claimed in claim 1, wherein side surfaces of the lens driving apparatus are closed by the base and the yoke.

4. The lens driving apparatus as claimed in claim 1, wherein the upper spring has a first side, which is inserted between the yoke and the magnets, and a second side coupled to the bobbin.

5. The lens driving apparatus as claimed in claim 1, wherein the second side of the upper spring is inserted into first support protrusions formed at the upper portion of the bobbin.

6. The lens driving apparatus as claimed in claim 1, further comprising:

a lens module coupled to the bobbin to go in and out the hole according to movement of the bobbin.

7. The lens driving apparatus as claimed in claim 1, wherein the yoke includes an upper surface formed with a hole, a closed side surface, and an opened bottom surface.

8. The lens driving apparatus as claimed in claim 1, wherein the magnet is fixed to an inner portion of the yoke.

9. The lens driving apparatus as claimed in claim 1, wherein the lower spring has one side integrally formed with the bobbin through injection molding.

10. The lens driving apparatus as claimed in claim 1, wherein a side surface of the bobbin has an octagonal shape.

11. A lens driving apparatus comprising:

a base;

a yoke coupled to the base;

a bobbin movably disposed in an inner portion of the yoke;

magnets disposed in the yoke;

a coil fixed to an outer portion of the bobbin while facing the magnets; and

springs coupled to the bobbin to provide restoration force to the bobbin,

wherein the springs comprise an upper spring coupled to an upper portion of the bobbin and a lower spring coupled to a lower portion of the bobbin, and

wherein the yoke is disposed on an outermost surface of the lens driving apparatus.

12. The lens driving apparatus as claimed in claim 11, wherein a portion of the bobbin between an upper surface and a side surface of the bobbin is exposed to an outside.

13. The lens driving apparatus as claimed in claim 11, wherein the upper spring is disposed between the yoke and the magnets.

14. The lens driving apparatus as claimed in claim 11, wherein the coil is overlapped with the yoke in a horizontal plane and wherein the coil is not overlapped with the yoke in a vertical plane.

15. A lens driving apparatus comprising:

a base;

a yoke coupled to the base;

a bobbin movably disposed in an inner portion of the yoke;

magnets disposed in the yoke;

a coil fixed to an outer portion of the bobbin while facing the magnets; and

springs coupled to the bobbin to provide restoration force to the bobbin,

wherein the springs comprise an upper spring coupled to an upper portion of the bobbin and a lower spring coupled to a lower portion of the bobbin, and

wherein the yoke includes four side surfaces and four corners, and each of the four corner is disposed between two side surfaces of the four side surface,

wherein the magnets are disposed in four regions adjacent to the four corners,

wherein each of the magnets includes a lower surface, an upper surface, and side surface,

wherein the side surfaces include an inner side surface faced with the coil, and three outer side surfaces faced with the yoke.

16. The lens driving apparatus as claimed in claim 15, wherein the inner side surface is planar.

17. The lens driving apparatus as claimed in claim 15, wherein the three outer side surfaces are planar.

18. The lens driving apparatus as claimed in claim 15, wherein the three outer side surfaces includes a first outer side surface, a second outer side surface, and a third outer side surface between the first outer side surface and the second outer side surface.

19. The lens driving apparatus as claimed in claim 18, wherein the first outer side surface and the second outer side surface are faced with the two side surfaces of the four side surface and the third outer side surface is faced with one of the four corners.

20. The lens driving apparatus as claimed in claim 18, wherein the inner side surface is parallel to the third outer surface.