Optical element driving mechanism

1. An optical element driving mechanism, comprising:

a fixed portion;

a movable portion movably connected to fixed portion, wherein the movable portion is used for connecting to an optical element having a main axis, and the movable portion comprises

a first movable portion, comprising a first contact portion having two sides, wherein a first angle is formed by the two sides;

a second movable portion having a first recess, wherein the first contact portion is disposed in the first recess, a shape of a portion of the first contact portion in contact with the first recess is a round angle; and

a driving assembly disposed on the fixed portion or the movable portion to move the movable portion relative to the fixed portion,

wherein a second angle is formed between the sidewalls of the first recess and the first angle is less than the second angle.

2. The optical element driving mechanism as claimed in claim 1 , further comprising a resilient element, wherein the second movable portion is movably connected to the fixed portion, and the first movable portion and the fixed portion are connected by the resilient element.

3. The optical element driving mechanism as claimed in claim 2 , wherein the driving assembly comprises two first magnetic elements respectively disposed on the first movable portion and the second movable portion.

4. The optical element driving mechanism as claimed in claim 2 , wherein the fixed portion comprises a case, and the case and the first movable portion do not overlap each other when viewed along the main axis.

5. The optical element driving mechanism as claimed in claim 2 , wherein the second movable portion comprises a second contact portion in direct contact with the fixed portion.

6. The optical element driving mechanism as claimed in claim 5 , wherein the fixed portion comprises a base having a rectangular shape, the base comprises an extending portion at a corner of the base, and the second contact portion is in direct contact with the extending portion of the base.

7. The optical element driving mechanism as claimed in claim 5 , wherein the fixed portion comprises a base having a rectangular shape, the base comprises an extending portion at a side of the base, and the second contact portion is in direct contact with the extending portion of the base.

8. The optical element driving mechanism as claimed in claim 5 , wherein the second contact portion and the fixed portion comprise an identical material.

9. The optical element driving mechanism as claimed in claim 8 , wherein the material comprises metal.

10. The optical element driving mechanism as claimed in claim 5 , wherein the fixed portion has a second recess, and a portion of the second contact portion that contacts the second recess has a shape of a round angle.

11. The optical element driving mechanism as claimed in claim 10 , wherein the second recess has a flat surface in direct contact with the second contact portion.

12. The optical element driving mechanism as claimed in claim 10 , wherein the contact portion has a distance greater than zero from a sidewall of the second recess.

13. The optical element driving mechanism as claimed in claim 1 , wherein the driving assembly comprises a first magnetic element and a second magnetic element respectively disposed on the movable portion and the fixed portion.

14. The optical element driving mechanism as claimed in claim 1 , wherein the movable portion comprises a first movable portion and a second movable portion, the fixed portion comprises a base, the base has a bottom surface facing away from the movable portion, and a minimum distance between the first movable portion and the bottom surface of the base is different than a minimum distance between the second movable portion and the bottom surface of the base.

15. The optical element driving mechanism as claimed in claim 1 , wherein the fixed portion comprises a case having a rectangular shape, and an opening is formed at a corner of the case.

16. The optical element driving mechanism as claimed in claim 1 , wherein the fixed portion comprises a case and a base, and a recess is formed between the case and the base when viewed in a direction that is perpendicular to the main axis.

17. The optical element driving mechanism as claimed in claim 1 , wherein the material of the fixed portion and the movable portion comprises non-magnetic permeable material.

18. The optical element driving mechanism as claimed in claim 1 , wherein the first recess has a flat surface in direct contact with the first contact portion.

19. The optical element driving mechanism as claimed in claim 1 , wherein a distance is formed between the first contact portion and one of the sidewalls of the first recess.