Lens driving device capable of improving convenience and inhibiting deformation of an elastic member, and camera module and optical device including same

Patent metadata

Field	Value
Publication number	US-12032223-B2
Application number	US-201917275579-A
Country	US
Kind code	B2
Filing date	Sep 19, 2019
Priority date	Sep 21, 2018
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

An embodiment comprises: a housing; a bobbin disposed in the hosing; a first coil disposed in the bobbin; a magnet disposed opposite to the first coil in the housing; a base disposed under the housing; a lower elastic member comprising a first elastic member and a second elastic member coupled to the bobbin and disposed on the base; a second coil disposed in the base so as to generate an inductive voltage by interaction with the first coil; and a first terminal and a second terminal arranged in the base and spaced apart from the first and second elastic members, wherein one end of the first coil is coupled to the first elastic member, the other end of the first coil is coupled to the second elastic member, one end of the second coil is coupled to the first terminal, and the other end of the second coil is coupled to the second terminal.

First claim

The invention claimed is:

1. A lens moving apparatus comprising:
a bobbin;
a first coil coupled to the bobbin;
a magnet opposite the first coil;
a base disposed spaced apart from the bobbin;
a lower elastic member coupled to the bobbin, the lower elastic member comprising a first elastic member and a second elastic member disposed on the base;
a second coil disposed on the base, the second coil being configured to generate induced voltage through interaction with the first coil; and
a first terminal and a second terminal coupled to the base, the first terminal and the second terminal being spaced apart from the first and second elastic members,
wherein a first portion of the first coil is coupled to the first elastic member and a second portion of the first coil is coupled to the second elastic member,
wherein each of the first and second terminals comprises:
a first portion exposed from an upper surface of the base; and
a second portion connected to the first portion, the second portion being bent in a lateral direction of the base, and

wherein a first portion of the second coil is coupled to the first portion of the first terminal and a second portion of the second coil is coupled to the first portion of the second terminal.

2. The lens moving apparatus according to claim 1 , wherein each of the first and second elastic members comprises:
an inner portion coupled to a lower portion of the bobbin;
an outer portion coupled to a lower portion of the housing;
a connection portion configured to connect the inner portion and the outer portion to each other; and
a connection terminal connected to the outer portion, the connection terminal being disposed on a first outer surface of the base.

3. The lens moving apparatus according to claim 2 , wherein the second portion of the first terminal and the second portion of the second terminal are disposed on the first outer surface of the base.

4. The lens moving apparatus according to claim 3 , wherein the second portion of the first terminal and the second portion of the second terminal are disposed between the connection terminal of the first elastic member and the connection terminal of the second elastic member.

5. The lens moving apparatus according to claim 1 , wherein the second coil is disposed between the base and the lower elastic member.

6. The lens moving apparatus according to claim 1 , wherein
the base is provided in an outer surface thereof with a recess, and
the second coil is disposed in the recess of the base.

7. The lens moving apparatus according to claim 1 , wherein the first portion of each of the first and second terminals comprises:
a first region overlapping the second coil in an optical-axis direction; and
a second region not overlapping the second coil in the optical-axis direction.

8. The lens moving apparatus according to claim 7 , further comprising:
a first solder configured to couple the second region of the first terminal and the first portion of the second coil to each other; and
a second solder configured to couple the second region of the second terminal and the second portion of the second coil to each other.

9. The lens moving apparatus according claim 1 , wherein
each of the first and second terminals further comprises a bent portion configured to connect the first portion and the second portion to each other, and
the bent portion is disposed in the base.

10. A lens moving apparatus comprising:
a bobbin;
a first coil coupled to the bobbin;
a magnet opposite the first coil;
a base disposed to be spaced apart from the bobbin;
a lower elastic member comprising first and second elastic members coupled to the bobbin;
a second coil coupled to the base; and
first and second terminals disposed on a first side portion of the base and spaced apart from the first and second elastic members,
wherein a first portion of the first coil is coupled to the first elastic member and a second portion of the first coil is coupled to the second elastic member, and a first portion of the second coil is coupled to the first terminal and a second portion of the second coil is coupled to the second terminal,
wherein the first elastic member comprises a first connection terminal disposed on the first side portion of the base and the second elastic member comprises a second connection terminal disposed on the first side portion of the base,
wherein each of the first and second terminals comprises:
a first portion exposed from an upper surface of the base; and
a second portion bent from the first portion and disposed on an outer surface of the first side portion of the base, and

wherein the first portion of the second coil is coupled to the first portion of the first terminal and the second portion of the second coil is coupled to the first portion of the second terminal.

11. The lens moving apparatus according to claim 10 , wherein the second coil comprise a shape corresponding to a shape of the first coil.

12. The lens moving apparatus according to claim 10 , wherein the second coil is larger than an outer diameter of the bobbin and disposed under the bobbin.

13. The lens moving apparatus according to claim 10 , wherein the second coil is configured to generate induced voltage through interaction with the first coil.

14. The lens moving apparatus according to claim 10 , wherein the second portion of the first terminal and the second portion of the second terminal are disposed between the first connection terminal and the second connection terminal.

15. The lens moving apparatus according to claim 10 , wherein the first portion of the base is overlapped with the second coil in an optical-axis direction.

16. The lens moving apparatus according to claim 10 , wherein the base comprises a first depressed portion and a second depressed portion formed in an outer surface of the first side portion, and wherein the first connection terminal is disposed in the first depressed portion and the second connection terminal is disposed in the second depressed portion.

17. A lens moving apparatus comprising:
a base;
a bobbin disposed on the base;
a first coil coupled to the bobbin;
a magnet opposite the first coil;
a second coil disposed on the base and configured to generate induced voltage through interaction with the first coil; and
a first terminal and a second terminal coupled to the base,
wherein each of the first and second terminals comprises:
a first portion exposed from an upper surface of the base; and
a second portion connected to the first portion, the second portion being bent in a lateral direction of the base, and

wherein a first portion of the second coil is coupled to the first portion of the first terminal and a second portion of the second coil is coupled to the first portion of the second terminal.

18. A camera module comprising:
a lens;
the lens moving apparatus according to claim 1 ; and
an image sensor.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Hyun Soo
• Son Byung Wook
• Min Sang Jun
• Park Sang Ok
• Lee Seong Min
• Jung Tae Jin

Classifications

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H02K41/0354

  Lorentz force motors, e.g. voice coil motors · CPC title

• G03B2205/0069

  using electromagnetic actuators, e.g. voice coils · CPC title

• G03B2205/0007

  Movement of one or more optical elements for control of motion blur · CPC title