Camera module

1. A camera module comprising:

a lens barrel accommodating a lens;

a lens holder accommodating the lens barrel;

an image sensor disposed under the lens barrel; and

a printed circuit board having the image sensor mounted thereon and coupled to the lens holder,

wherein the lens barrel and the lens holder are primarily coupled to each other in a state where an optical axis of the lens and an optical axis of the image sensor are aligned, and are secondarily coupled to each other in the primarily coupled state, and

wherein the lens barrel comprises an accommodating portion for accommodating the lens, a plate formed to be extended from the accommodating portion for having at least a portion overlapped with an upper surface of the lens holder, a coupling hole formed on the plate, and a first soldering member formed on an inner lateral surface of the coupling hole, the coupling hole being filled with a coupling material having lateral surfaces contacting inner lateral surfaces of the first soldering member.

2. The camera module according to claim 1 , wherein a lower surface of the plate and the upper surface of the lens holder facing the lower surface of the plate are primarily coupled, and

wherein the coupling hole and the upper surface of the lens holder are secondarily coupled, and the upper surface of the lens holder also faces the coupling hole.

3. The camera module according to claim 1 ,

wherein the lens holder comprises a second soldering member formed on an upper surface of the lens holder overlapped with the coupling hole.

4. The camera module according to claim 3 , wherein the second soldering member comprises a protruding member formed to be protruded toward the coupling hole.

5. The camera module according to claim 3 , wherein the first and second soldering members comprise low temperature soldering members weldable at a low temperature.

6. The camera module according to claim 1 , wherein the coupling hole is tapered such that a lower side is narrower than an upper side.

7. The camera module according to claim 1 , wherein the primarily coupling includes an epoxy adhesive coupling and the secondarily coupling includes a soldering coupling.

8. A camera module comprising:

a lens barrel accommodating a lens;

a lens holder accommodating the lens barrel;

a coupling portion disposed outside the lens barrel and the lens holder;

an image sensor disposed under the lens barrel; and

a printed circuit board having the image sensor mounted thereon and coupled to the lens holder,

wherein the lens barrel and the lens holder are primarily coupled to each other in a state where an optical axis of the lens and an optical axis of the image sensor are aligned,

wherein the coupling portion is secondarily coupled to the lens barrel and the lens holder in the primarily coupled state, and

wherein the lens barrel comprises an accommodating portion for accommodating the lens, a plate formed to be extended from the accommodating portion for having at least a portion overlapped with an upper surface of the lens holder, a coupling hole formed on the plate, and a first soldering member formed on an inner lateral surface of the coupling hole, the coupling hole being filled with a coupling material having lateral surfaces contacting inner lateral surfaces of the first soldering member.

9. The camera module according to claim 8 , wherein the coupling portion comprises a first coupling member overlapped with the lens barrel and a second coupling member overlapped with the lens holder.

10. The camera module according to claim 9 , wherein the lens barrel comprises a third soldering member formed on an outer side surface of the lens barrel overlapped with the first coupling member, and

wherein the lens holder comprises a fourth soldering member formed on an outer side surface of the lens holder overlapped with the second coupling member.

11. The camera module according to claim 10 , wherein the third and the fourth soldering members comprise low temperature soldering members weldable at a low temperature.

12. The camera module according to claim 9 , wherein the first and second coupling members are formed as a hole or a groove.

13. The camera module according to claim 12 , wherein the hole or the groove is tapered.

14. The camera module according to claim 8 , wherein a lower surface of the plate and the upper surface of the lens holder overlapped with the plate are primarily coupled.

15. The camera module according to claim 8 , wherein the primarily coupling includes an epoxy adhesive coupling and the secondarily coupling includes a soldering coupling.

16. The camera module according to claim 8 , wherein the coupling portion is formed of a weldable material.

17. A camera module comprising:

a lens barrel accommodating a lens;

a lens holder coupled with the lens barrel;

an image sensor disposed under the lens barrel; and

a printed circuit board having the image sensor mounted thereon,

wherein the lens holder and the printed circuit board are primarily coupled to each other in a state where an optical axis of the lens and an optical axis of the image sensor are aligned, and are secondarily coupled to each other in the primarily coupled state, and

wherein the lens barrel comprises an accommodating portion for accommodating the lens, a plate formed to be extended from the accommodating portion for having at least a portion overlapped with an upper surface of the lens holder, a coupling hole formed on the plate, and a first soldering member formed on an inner lateral surface of the coupling hole, the coupling hole being filled with a coupling material having lateral surfaces contacting inner lateral surfaces of the first soldering member.

18. The camera module according to claim 17 , wherein the primarily coupling includes an epoxy adhesive coupling and the secondarily coupling includes a soldering coupling.