Lens moving apparatus

• US 9,964,775 B2
• Filed: 07/09/2015
• Issued: 05/08/2018
• Est. Priority Date: 07/16/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Yeo, In Jae
• Primary Examiner(s): Rakowski, Cara
• Application Number:
  US14/795,297
• Publication Number:
  US 20160018667A1
• Time in Patent Office: 1,034 Days
• CPC Class Codes: G02B 27/646 compensating for small deviations, e.g. due to vibration or shake movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68
• CPC Class Codes: G02B 7/04 with mechanism for focusing or varying magnification
• CPC Class Codes: G02B 7/08 adapted to co-operate with a remote control mechanism
• CPC Class Codes: H01F 7/20 without armatures cores H01F3/00; coils H01F5/00 ; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381

Abstract

A lens moving apparatus includes a housing supporting a driving magnet, a bobbin provided on an outer surface thereof with a coil disposed in the driving magnet and moving in a first direction in the housing, a base disposed under the bobbin to be spaced apart from the bobbin by a predetermined distance, an upper elastic member disposed above the bobbin and including an inner frame connected to the bobbin and an outer frame coupled to the housing, and a support member coupled at a lower portion thereof to the base and including a projecting portion protruding upward and bent at at least a portion thereof, at least a portion of the bent portion of the projecting portion being coupled to the upper elastic member.

Claims

1. A lens moving apparatus comprising:

a housing supporting a driving magnet;

a bobbin provided on an outer surface thereof with a coil disposed in the driving magnet and moving in a first direction in the housing;

a base disposed under the bobbin to be spaced apart from the bobbin by a predetermined distance;

an upper elastic member disposed above the bobbin and including an inner frame coupled to the bobbin and an outer frame coupled to the housing;

a lower elastic member disposed under the bobbin and including an inner frame coupled to the bobbin and an outer frame coupled to the housing;

a support member coupled at a lower portion thereof to the base and including a projecting portion protruding upward, a portion of the projecting portion being coupled to the upper elastic member;

a pair of control plates disposed at the support member; and

a bonding portion disposed at at least a portion of the pair of control plates,

wherein the pair of control plates and the bonding portion control a damping coefficient of the support member,

wherein the pair of control plates includes a plurality of through holes, and

wherein the bonding portion is initially provided in a liquid state and is introduced into the plurality of through holes and hardens in place.

2. The lens moving apparatus according to claim 1, wherein the support member is configured such that a portion of a surface of the projecting portion faces an upper surface of the upper elastic member, and the upper elastic member is coupled to the projecting portion by means of a conductive bonding material.

3. The lens moving apparatus according to claim 2, wherein the conductive bonding material is made of solder or conductive adhesive, and

wherein the solder forms a solder portion securely enveloping a portion of the projecting portion and bulging upward from the upper elastic member, and the solder portion is disposed on the upper elastic member and coupled thereto.

4. The lens moving apparatus according to claim 2, wherein the support member comprises:

a first coupling portion that includes the projecting portion and is coupled to the upper elastic member;

a second coupling portion coupled to the base;

a first elastic deformation portion extending from the first coupling portion; and

a second elastic deformation portion extending from the second coupling portion.

5. The lens moving apparatus according to claim 2, wherein the support member includes a plurality of support members disposed to surround the bobbin, and the projecting portion includes a plurality of projecting portions spaced apart from each other by a predetermined distance in a second direction, which is perpendicular to the first direction.

6. The lens moving apparatus according to claim 2, wherein a portion of the projecting portion is disposed to define an angle of −

30°

to 30°

with respect to the upper surface of the upper elastic member.

7. The lens moving apparatus according to claim 2, wherein the projection portion has a width of 80 μ

m to 1000 μ

m.

8. The lens moving apparatus according to claim 4, wherein the support member further comprises a connecting portion connected between the first elastic deformation portion and the second elastic deformation portion.

9. The lens moving apparatus according to claim 2, wherein the projecting portion is formed integrally to the support member, or is separately formed to have a bent portion and is coupled to an upper portion of the support member.

20. The lens moving apparatus according to claim 1, further comprising a cover member accommodating the support member, wherein a distance between an outer surface of the support member and an inner surface of the cover member is equal to a movable distance of the support member toward the cover member in at least one of a second direction and a third direction, both of which are perpendicular to the first direction.

10. A lens moving apparatus comprising:

a housing supporting a driving magnet;

a bobbin provided on an outer surface thereof with a coil disposed in the driving magnet and moving in a first direction in the housing;

a base disposed under the bobbin to be spaced apart from the bobbin by a predetermined distance;

an upper elastic member disposed above the bobbin and including an inner frame coupled to the bobbin and an outer frame coupled to the housing;

a lower elastic member disposed under the bobbin and including an inner frame coupled to the bobbin and an outer frame coupled to the housing;

a support member disposed at a lateral surface of the housing, the support member being coupled at an upper portion thereof to the housing and coupled at a lower portion thereof to the base, and supporting the bobbin and the housing such that the bobbin and the housing are movable in second and third directions, which are perpendicular to the first direction;

a pair of control plates disposed at the support member; and

a bonding portion disposed at at least a portion of the pair of control plates,

wherein the pair of control plates and the bonding portion control a damping coefficient of the support member,

wherein the pair of control plates includes a plurality of through holes, and

wherein the bonding portion is initially provided in a liquid state and is introduced into the plurality of through holes and hardens in place.

11. The lens moving apparatus according to claim 10, wherein the support member comprises:

a first coupling portion coupled to the housing;

a second coupling portion coupled to the base;

a pair of first elastic deformation portions that extend from the first coupling portion and are symmetrically disposed with respect to each other;

a pair of second elastic deformation portions that extend from the second coupling portion and are symmetrically disposed with respect to each other; and

a pair of connecting portions, wherein each of the connecting portions is connected to a first elastic deformation portion of the pair of first elastic deformation portions and a second elastic deformation portion of the pair of second elastic deformation portions, and

wherein the pair of connecting portions connect the pair of first elastic deformation portions and the pair of second elastic deformation portions.

12. The lens moving apparatus according to claim 11, wherein the pair of connecting portions includes the pair of control plates that are coupled to at least a portion of the bonding portion of the support member and are turned in one of the first, second and third directions depending on deformation of the support member, and

wherein the pair of control plates are disposed to face each other.

13. The lens moving apparatus according to claim 12, wherein the pair of control plates are secured or coupled to each other by the bonding portion,

wherein the bonding portion secures or couples the pair of control plates to each other at at least one portion of upper portions, center portions and lower portions thereof, which are opposite each other.

14. The lens moving apparatus according to claim 12, wherein the bonding portion includes a plurality of bonding portions, and each of the plurality of bonding portions secures or couples the pair of control plates and the first coupling portion to one another, or secures or couples the pair of control plates, the first coupling portion and the pair of first elastic deformation portions to one another.

15. The lens moving apparatus according to claim 12, wherein the pair of control plates are secured or coupled to each other by the bonding portion in a state of being turned by a predetermined angle in one of the first, second and third directions, and the pair of control plates and the first coupling portion are secured or coupled to one another by the bonding portion.

16. The lens moving apparatus according to claim 12, wherein the pair of control plates includes a plurality of through holes and/or recesses formed in at least a portion thereof, and the base includes a mount recess into which the second coupling portion is coupled.

17. The lens moving apparatus according to claim 10, wherein the support member is conductively connected to the upper and lower elastic members.

18. The lens moving apparatus according to claim 10, wherein the bonding portion is made of a thermosetting material or an ultraviolet-curable material.

19. The lens moving apparatus according to claim 11, wherein the pair of connecting portions are symmetrically disposed with respect to each other.