Voice coil motor, coil block for voice coil motor, method of manufacturing the coil block, and voice coil motor having the coil block

Patent metadata

Field	Value
Publication number	US-9621017-B2
Application number	US-201514920395-A
Country	US
Kind code	B2
Filing date	Oct 22, 2015
Priority date	Jul 6, 2010
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A VCM (voice coil motor) is disclosed, the VCM comprising: a bobbin formed with a support unit protruded from a periphery of a body at a bottom portion of the body, and a recess unit partially removed at the support unit; and a coil block supported by the support unit and including a plurality of coil layers wound at a periphery of the bobbin, wherein first and second distal ends of the coil block pass through the recess unit.

First claim

What is claimed is:

1. A VCM (Voice Coil Motor), the VCM comprising:
a base;
a housing disposed on the base and coupled to the base;
a magnet disposed on the housing;
a bobbin including a support unit protruded from a periphery of a lower portion of the bobbin, wherein a portion of the support unit is formed with a first groove, and the first groove is extended to a lower surface of the bobbin;
a coil block arranged at a periphery of the bobbin and facing the magnet, and supported by the support unit;
a first elastic member supporting a lower portion of the bobbin;
a second elastic member supporting an upper portion of the bobbin; and
a cover can covering the housing, and including an upper plate formed with an opening and a lateral plate extended from an edge portion of the upper plate towards the base, and coupled to the base,
wherein the first elastic member is formed in a pair having a first member and a second member physically separated from the first member,
wherein a first distal end of the coil block passes through the first groove of the bobbin and is connected to the first member of the first elastic member, and
wherein a second distal end of the coil block is connected to the second member of the first elastic member.

2. The VCM of claim 1 , wherein each of the first and second members includes an inner portion coupled to the bobbin, an outer portion arranged between the housing and the base, and a connection portion connecting the inner portion to the outer portion.

3. The VCM of claim 2 , wherein a first hole is formed at the outer portion of the first elastic member corresponding to a first protrusion formed at an upper surface of the base.

4. The VCM of claim 3 , wherein a second protrusion is protruded along the periphery of the bobbin.

5. The VCM of claim 4 , wherein the bobbin further includes a third protrusion at a lower surface thereof, wherein a second hole is formed at an inner portion of the first elastic member corresponding to the third protrusion, and wherein the third protrusion and the second hole are mutually coupled.

6. The VCM of claim 3 , wherein the bobbin comprises a plurality of second protrusions intermittently protruded along the periphery of the bobbin.

7. The VCM of claim 3 , wherein the outer portion of the first member includes a first terminal, wherein the outer portion of the second member includes a second terminal, and wherein the first and second terminals each is configured to receive an external electric power.

8. The VCM of claim 7 , wherein each of the first and second terminals is connected to a PCB through the base.

9. The VCM of claim 3 , wherein the housing is formed with a second groove corresponding to the first protrusion.

10. The VCM of claim 1 , wherein the magnet includes four magnets each having a plate shape, and is coupled to the cover can.

11. The VCM of claim 1 , wherein the periphery of the bobbin is alternately formed with a curvature unit and a planar unit.

12. The VCM of claim 11 , wherein the bobbin further includes a second groove between the curvature unit and the planar unit at an external surface thereof.

13. The VCM of claim 1 , wherein the coil block includes a plurality of coil layers.

14. The VCM of claim 1 , wherein each of the distal ends of the coil block is connected to the first and second members by soldering, respectively.

15. The VCM of claim 1 , wherein the housing comprises an upper surface formed with a second opening corresponding to the first opening of the cover can, and a lateral surface extended in a direction from an edge of the upper surface towards the base, wherein the magnet is arranged at the lateral surface of the housing.

16. The VCM of claim 15 , wherein the magnet is secured to a recess portion formed at the lateral surface of the housing.

17. The VCM of claim 1 , wherein the first groove is formed concavely from the periphery of the bobbin.

18. The VCM of claim 1 , wherein the base includes a coupling pillar formed at an upper surface thereof, and the coupling pillar is coupled to the housing.

19. A camera, the camera comprising an image sensor module, an infrared (IR) filter, and a Voice Coil Motor (VCM), wherein the VCM comprises:
a base;
a housing disposed on the base and coupled to the base;
a magnet disposed on the housing;
a bobbin including a support unit protruded from a periphery of a lower portion of the bobbin, wherein a portion of the support unit is formed with a first groove, and the first groove is extended to a lower surface of the bobbin;
a coil block arranged at a periphery of the bobbin and facing the magnet, and supported by the support unit;
a first elastic member supporting a lower portion of the bobbin;
a second elastic member supporting an upper portion of the bobbin; and
a cover can covering the housing, and including an upper plate formed with an opening and a lateral plate extended from an edge portion of the upper plate towards the base, and coupled to the base,
wherein the first elastic member is formed in a pair having a first member and a second member physically separated from the first member,
wherein a first distal end of the coil block passes through the first groove of the bobbin and is connected to the first member of the first elastic member, and
wherein a second distal end of the coil block is connected to the second member of the first elastic member.

20. A mobile phone comprising the camera of claim 19 .

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Seongmin
• Park Sangok
• Min Sangjun
• Jung Taejin

Classifications

• H04N23/55

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

• H04N23/51

  Housings · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H02K41/0356 Primary

  moving along a straight path · CPC title

• H04N5/2254

  Electricity · mapped topic