Camera module and manufacturing method thereof

1. A camera module comprising:

a lens barrel comprising a lens;

a lens holder coupled with the lens barrel;

a printed circuit board fixed to the lens holder;

an image sensor disposed on the printed circuit board and disposed below the lens barrel; and

a welding point coupling the lens barrel and the lens holder while an optical axis of the lens and an optical axis of the image sensor are aligned,

wherein the lens barrel comprises an outer lateral surface facing an inner lateral surface of the lens holder, a first extension part extending from the outer lateral surface of the lens barrel, and a second extension part extending downwardly from the first extension part,

wherein the first and second extension parts are overlapped with the lens holder in a direction of the optical axis of the lens,

wherein the welding point fixes the second extension part of the lens barrel to the lens holder so that the outer lateral surface of the lens barrel is spaced apart from the inner lateral surface of the lens holder, and

wherein the second extension part is disposed above an upper surface of the lens holder.

2. The camera module of claim 1 , wherein the lens holder comprises a protrusion protruding upwardly from the upper surface of the lens holder.

3. The camera module of claim 2 , wherein an inner lateral surface of the second extension part faces an outer lateral surface of the protrusion.

4. The camera module of claim 3 , wherein the welding point is disposed between the inner lateral surface of the second extension part and the outer lateral surface of the protrusion.

5. The camera module of claim 2 , wherein the protrusion of the lens holder is formed in the shape of a fence.

6. The camera module of claim 1 , comprising a waterproof member disposed between the lens barrel and the lens holder.

7. The camera module of claim 1 , wherein the welding point is disposed above the upper surface of the lens holder.

8. The camera module of claim 1 , wherein the lens holder and the lens barrel welded by the welding point are formed with the same material.

9. The camera module of claim 1 , wherein the first extension part overlaps with the upper surface of the lens holder, and

wherein the welding point is disposed between the first extension part and the upper surface of the lens holder.

10. The camera module of claim 1 , wherein the first extension part is disposed above the upper surface of the protrusion.

11. The camera module of claim 1 , wherein the welding point is formed by a laser beam, and

wherein the laser beam is inwardly provided from an outer side of at least one of the lens holder and the lens barrel.

12. The camera module of claim 1 , wherein the outer lateral surface of the lens barrel is not directly coupled with the inner lateral surface of the lens holder.

13. The camera module of claim 1 , wherein a gap is formed between the outer lateral surface of the lens barrel and the inner lateral surface of the lens holder, and

wherein the gap extends from the upper surface of the lens holder to a lower end of the lens barrel.

14. A camera module comprising:

a lens barrel comprising a lens;

a lens holder coupled with the lens barrel;

a printed circuit board fixed to the lens holder;

an image sensor disposed on the printed circuit board and below the lens barrel; and

a welding point coupling the lens barrel and the lens holder while an optical axis of the lens and an optical axis of the image sensor are aligned,

wherein the lens barrel comprises a first extension part extending from a lateral surface of the lens barrel, and a second extension part extending downwardly from the first extension part,

wherein the lens holder comprises a protrusion protruding upwardly from an upper surface of the lens holder,

wherein the second extension part is disposed above the upper surface of the lens holder, and

wherein an inner lateral surface of the second extension part faces an outer lateral surface of the protrusion.

15. The camera module of claim 14 , wherein the welding point is disposed between the inner lateral surface of the second extension part and the outer lateral surface of the protrusion.

16. The camera module of claim 15 , wherein the welding point is disposed above the upper surface of the lens holder.

17. The camera module of claim 14 , wherein the first extension part is disposed above the upper surface of the protrusion.

18. The camera module of claim 17 , wherein the welding point is exposed to an outerward direction.