Voice coil motor comprising a structure forming a space for movement of an elastic member

Patent metadata

Field	Value
Publication number	US-10939027-B2
Application number	US-201916539776-A
Country	US
Kind code	B2
Filing date	Aug 13, 2019
Priority date	Jan 3, 2014
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A camera module according to an exemplary embodiment of the present disclosure is proposed, the camera module including a PCB (Printed Circuit Board) mounted with an image sensor, a housing member arranged at an upper surface of the PCB, a bobbin movably positioned at an inner side of the housing member, an upper elastic member connected to an upper surface of the housing member and to an upper surface of the bobbin, and a space forming part formed at one side of the housing member to provide a moving space to the upper elastic member when the bobbin makes a relatively vertical movement to the housing member.

First claim

What is claimed is:

1. A VCM (Voice Coil Motor) comprising:
a housing member comprising an upper plate and a lateral plate extending from the upper plate;
a bobbin disposed in the housing member;
a coil disposed on the bobbin;
a magnet disposed between the coil and the lateral plate of the housing member; and
an upper elastic member comprising a first fixing part disposed between the upper plate of the housing member and the magnet, a second fixing part coupled with the bobbin, and a connection part connecting the first fixing part and the second fixing part,
wherein the magnet is disposed on the lateral plate of the housing member,
wherein the first fixing part of the upper elastic member is fixed to the upper plate of the housing member by an adhesive member, and
wherein the connection part of the upper elastic member is spaced apart from the upper plate of the housing member.

2. The VCM of claim 1 ,
wherein the upper plate of the housing member comprises a support protrusion protruding toward the magnet,
wherein the first fixing part of the upper elastic member is fixed to the support protrusion by the adhesive member.

3. The VCM of claim 1 , wherein the magnet the magnet is directly bonded to the housing member.

4. The VCM of claim 1 , wherein a lower surface of the first fixing part contacts with an upper surface of the magnet, and
wherein the connection part of the upper elastic member is spaced apart from the magnet.

5. The VCM of claim 2 , wherein the upper plate of the housing member comprises a flat plate and the support protrusion integrally formed with the flat plate,
wherein a lower surface of the support protrusion is disposed at a position lower than that of a lower surface of the flat plate,
wherein the first fixing part of the upper elastic member is fixed to the lower surface of the support protrusion by the adhesive member, and
wherein an area of an upper surface of the magnet is greater than an area of the lower surface of the support protrusion.

6. The VCM of claim 1 , wherein the lateral plate of the housing member extends from an outer edge of the upper plate of the housing member,
wherein the housing member comprises an inner yoke extending from an inner edge of the upper plate,
wherein the coil is disposed on an outer lateral surface of the bobbin,
wherein the bobbin comprises a groove formed on the outer lateral surface of the bobbin, and
wherein a portion of the inner yoke is disposed in the groove of the bobbin and between the coil and the bobbin.

7. The VCM of claim 6 , wherein the connection part of the upper elastic member is disposed between the first fixing part of the upper elastic member and the inner yoke.

8. The VCM of claim 1 , wherein the connection part of the upper elastic member is overlapped with the coil in an optical axis direction.

9. The VCM of claim 1 , comprising:
a base disposed below the bobbin and coupled with the lateral plate of the housing member; and
a lower elastic member comprising a third fixing part disposed on an upper surface of the base, a fourth fixing part coupled with the bobbin, and another connection part connecting the third fixing part and the fourth fixing part, and
wherein the lower elastic member comprises two elastic units spaced apart from each other.

10. The VCM of claim 2 , wherein the lateral plate of the housing member comprises four lateral plates,
wherein four corner regions are formed by the four lateral plates,
wherein the magnet comprises four magnets, and
wherein the four magnets are disposed on the four corner regions of the housing member, respectively.

11. The VCM of claim 10 , wherein the support protrusion is formed on each of the four corner regions of the housing member.

12. The VCM of claim 1 , wherein the coil has an octagonal shape.

13. The VCM of claim 1 , wherein the adhesive member comprises an epoxy.

14. The VCM of claim 5 , wherein the support protrusion of the housing member is bent from the flat plate of the housing member.

15. A camera module, comprising:
a PCB (Printed Circuit Board);
an image sensor disposed on the PCB;
the VCM of claim 1 disposed on the PCB; and
a lens coupled with the bobbin of the VCM.

16. A VCM (Voice Coil Motor) comprising:
a housing member comprising an upper plate and a lateral plate extending from the upper plate;
a bobbin disposed in the housing member;
a coil disposed on the bobbin;
a magnet disposed between the coil and the lateral plate of the housing member; and
an upper elastic member comprising a first fixing part disposed between the upper plate of the housing member and the magnet, a second fixing part coupled with the bobbin, and a connection part connecting the first fixing part and the second fixing part,
wherein the magnet is disposed on the lateral plate of the housing member,
wherein the upper plate of the housing member comprises a flat plate and a support protrusion integrally formed with the flat plate,
wherein a lower surface of the support protrusion is disposed at a position lower than that of a lower surface of the flat plate, and
wherein the first fixing part of the upper elastic member is fixed between the lower surface of the support protrusion and the magnet.

17. The VCM of claim 16 , wherein an adhesive member connects the lower surface of the support protrusion and the first fixing part.

18. The VCM of claim 16 , wherein the connection part of the upper elastic member is spaced apart from the upper plate of the housing member and the magnet.

19. The VCM of claim 16 , wherein a lower surface of the first fixing part contacts with an upper surface of the magnet.

20. A VCM (Voice Coil Motor) comprising:
a housing member comprising an upper plate and a lateral plate extending from the upper plate;
a bobbin disposed in the housing member;
a coil disposed on the bobbin;
a magnet disposed between the coil and the lateral plate of the housing member; and
an upper elastic member comprising a first fixing part disposed between the upper plate of the housing member and the magnet, a second fixing part coupled with the bobbin, and a connection part connecting the first fixing part and the second fixing part,
wherein the upper plate of the housing member comprises a protruding part protruding toward the magnet,
wherein the magnet is contacted with the first fixing part of the upper elastic member,
wherein the magnet is bonded to the housing member by an adhesive member,
wherein the first fixing part of the upper elastic member is fixed to the protruding part of the housing member.

Assignees

• Lg Innotek Co Ltd

Inventors

• Park Sang Ok
• Lee Seong Min
• Lee Jun Taek

Classifications

• H04N23/57 Primary

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

• H04N23/54

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

• H04N23/55

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

• H04N23/51

  Housings · CPC title

• H02K41/0354

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