Lens moving apparatus

Patent metadata

Field	Value
Publication number	US-9360653-B2
Application number	US-201514699459-A
Country	US
Kind code	B2
Filing date	Apr 29, 2015
Priority date	May 9, 2014
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

Embodiments provide a lens moving apparatus including housing to support a driving magnet, a bobbin provided at an outer circumferential surface thereof with a coil located inside the driving magnet, the bobbin being moved in a first direction parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil, a lower elastic member to connect a lower portion of the housing and a lower portion of the bobbin to each other, both ends of the coil being electrically connected to the lower elastic member, the lower elastic member having a first terminal electrically connected to an external power source so as to supply external power to the ends of the coil, and a printed circuit board provided at one side surface of the housing, the printed circuit board having a second terminal electrically connected to the external power source.

First claim

What is claimed is:

1. A lens moving apparatus comprising:
a housing supporting a driving magnet;
a bobbin provided at an outer circumferential surface thereof with a coil located inside the driving magnet, the bobbin being moved in a first direction along or parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil;
a lower elastic member configured to connect a lower portion of the housing and a lower portion of the bobbin to each other, both ends of the coil being electrically connected to the lower elastic member, the lower elastic member having a first terminal electrically connected to an external power source so as to supply external power to the ends of the coil;
a printed circuit board provided at one side surface of the housing, the printed circuit board having a second terminal electrically connected to the external power source; and
a displacement sensing unit configured to determine a displacement of the bobbin in the first direction,
wherein the first terminal and the second terminal are arranged at the same side surface of the housing so as to be oriented downward.

2. The lens moving apparatus according to claim 1 , wherein the lower elastic member includes:
an inner frame coupled to the bobbin;
an outer frame coupled to the housing; and
a connector configured to elastically connect the inner frame and the outer frame to each other.

3. The lens moving apparatus according to claim 2 , wherein the lower elastic member comprises two first terminals, and the two first terminals are located adjacent to each other at one surface of the outer frame.

4. The lens moving apparatus according to claim 2 , wherein the first terminal is located at an edge of one surface of the outer frame.

5. The lens moving apparatus according to claim 2 , wherein the first terminal is configured to extend outward from one surface of the outer frame and be bent downward.

6. The lens moving apparatus according to claim 5 , wherein the printed circuit board has an avoidance cutout extending downward from a position corresponding to a position of the first terminal.

7. The lens moving apparatus according to claim 5 , wherein the first terminal has a cutout formed in at least one side surface among both side surfaces of a bending portion.

8. The lens moving apparatus according to claim 1 , wherein the displacement sensing unit includes:
a sensing magnet of the bobbin disposed inside the printed circuit board; and
a position sensor located at an inner surface of the printed circuit board, provided at one side surface of the housing, at a position corresponding to the sensing magnet, the position sensor configured to sense the displacement of the sensing magnet in the first direction.

9. A lens moving apparatus comprising:
a housing supporting a driving magnet;
a bobbin provided at an outer circumferential surface thereof with a coil located inside the driving magnet, the bobbin being moved in a first direction along or parallel to an optical axis within the housing via electromagnetic interaction between the driving magnet and the coil;
an upper elastic member and a lower elastic member configured to connect the housing and the bobbin to each other, both ends of the coil being electrically connected respectively to the upper elastic member and the lower elastic member;
a printed circuit board provided at one side surface of the housing, the printed circuit board having an input terminal and an output terminal electrically connected to an external power source; and
a displacement sensing unit configured to determine a displacement of the bobbin in the first direction,
wherein the upper elastic member is electrically connected to one terminal among the input terminal and the output terminal and the lower elastic member is electrically connected to the other terminal among the input terminal and the output terminal.

10. The lens moving apparatus according to claim 9 , wherein each of the upper elastic member and the lower elastic member includes:
an inner frame coupled to one of an upper surface and a lower surface of the bobbin;
an outer frame coupled to one of an upper surface and a lower surface of the housing; and
a connector configured to elastically connect the inner frame and the outer frame to each other.

11. The lens moving apparatus according to claim 10 , wherein one end among both ends of the coil is electrically connected to the inner frame of the lower elastic member, and
wherein the other end among both ends of the coil is electrically connected to the inner frame of the upper elastic member.

12. The lens moving apparatus according to claim 10 , wherein the outer frame of the upper elastic member has a first intermediate terminal configured to horizontally outwardly extend so as to be electrically connected to the one terminal, and
wherein the outer frame of the lower elastic member has a second intermediate terminal configured to horizontally outwardly extend so as to be electrically connected to the other terminal.

13. The lens moving apparatus according to claim 12 , wherein each of the first intermediate terminal and the second intermediate terminal is provided at one side surface of the outer frame facing an inner surface of the printed circuit board.

14. The lens moving apparatus according to claim 12 , wherein the first intermediate terminal is electrically connected to an upper connection terminal provided at an inner surface of the printed circuit board at the same height as that of the upper elastic member, the upper connection terminal being electrically connected to the one terminal, and
wherein the second intermediate terminal is electrically connected to a lower connection terminal provided at the inner surface of the printed circuit board at the same height as that of the lower elastic member, the lower connection terminal being electrically connected to the other terminal.

15. The lens moving apparatus according to claim 12 , wherein each of the first intermediate terminal and the second intermediate terminal is provided at both side surfaces thereof with path delimiting cutouts formed by cutting out outer portions of the outer frame.

16. The lens moving apparatus according to claim 12 , wherein the housing has a first avoidance cutout formed in an outer surface thereof facing an inner surface of the printed circuit board, the first avoidance cutout having a prescribed depth from the bottom of the first intermediate terminal, and the housing further has a second avoidance cutout formed in the outer surface thereof facing the inner surface of the printed circuit board, the second avoidance cutout having a prescribed height from the top of the second intermediate terminal.

17. The lens moving apparatus according to claim 10 , wherein the one terminal and the other terminal are provided at a lower portion of the printed circuit board so as to be oriented outward.

18. The lens moving apparatus according to claim 17 , wherein the one terminal is electrically connected to an upper connection terminal provided at an inner surface of the printed circuit board at the same height as that of the upper elastic member so as to be electrically connected to the upper elastic member, and
wherein the other terminal is electrically connected to a lower connection terminal provided at the inner surface of the printed circuit board at the same height as that of the lower elastic member so as to be electrically connected to the lower elastic member.

19. The lens

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Jun Taek
• Park Sang Ok
• Son Byung Wook
• Lee Seong Min

Classifications

• G02B7/08 Primary

  adapted to co-operate with a remote control mechanism · CPC title

• G03B2205/0069

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

• G02B7/04 Primary

  with mechanism for focusing or varying magnification · CPC title

• G03B13/36

  Autofocus systems · CPC title

• G03B3/10

  Power-operated focusing · CPC title