Optical element driving mechanism

1. An optical element driving mechanism, comprising:

a movable part, configured to be connected to an optical element;

a fixed assembly, having a first opening, wherein the movable part is movable relative to the fixed assembly along a first axis; and

a driving assembly, configured to drive the movable part to move between a first position and a second position relative to the fixed assembly, so that the optical element selectively overlaps the first opening;

wherein the optical element driving mechanism further comprises a first circuit assembly configured to be electrically connected to an external control circuit,

wherein the movable part has a magnetically conductive material and comprises an electrical conductive member, and

when the movable part is located in the first position relative to the fixed assembly, the electrical conductive member is configured to be electrically connected to the first circuit assembly, so that the external control circuit determines that the movable part is located in the first position.

2. The optical element driving mechanism as claimed in claim 1 , wherein the optical element driving mechanism further comprises a second circuit assembly configured to be electrically connected to the external control circuit; and

when the movable part is located in the second position relative to the fixed assembly, the electrical conductive member is configured to be electrically connected to the second circuit assembly, so that the external control circuit determines that the movable part is located in the second position.

3. The optical element driving mechanism as claimed in claim 2 , wherein the electrical conductive member comprises a base portion, two side portions and a cantilever section, each of which has a plate-shaped structure;

the two side portions are connected to opposite sides of the base portion;

an extending direction of the two side portions is different from an extending direction of the base portion;

the base portion is connected to a main body of the movable part by the cantilever section; and

the main body and the electrical conductive member are integrally formed as one piece.

4. The optical element driving mechanism as claimed in claim 3 , wherein when viewed along a second axis perpendicular to the first axis, an angle between the side portion and the base portion is greater than 90 degrees; and

when viewed along the first axis, an angle between the main body and the cantilever section is greater than 90 degrees.

5. The optical element driving mechanism as claimed in claim 4 , wherein the first circuit assembly comprises a first circuit member and a second circuit member, which have a metal material; and

when the movable part is located in the first position, the two side portions are respectively in contact with the first circuit member and the second circuit member.

6. The optical element driving mechanism as claimed in claim 5 , wherein the second circuit assembly comprises a third circuit member and a fourth circuit member, which have a metal material;

when the movable part is located in the second position, the two side portions are respectively in contact with the third circuit member and the fourth circuit member; and

the second circuit member is electrically connected to the third circuit member.

7. The optical element driving mechanism as claimed in claim 6 , wherein the main body comprises a front side portion, a middle portion and a rear side portion;

the middle portion is connected between the front side portion and the rear side portion; and

the front side portion has two clamping structures configured to clamp the optical element.

8. The optical element driving mechanism as claimed in claim 7 , wherein there is a stage difference between the front side portion and the middle portion; and

a shortest distance between the front side portion and the fixed assembly is greater than a shortest distance between the middle portion and the fixed assembly.

9. The optical element driving mechanism as claimed in claim 8 , wherein an extending direction of the rear side portion is different from an extending direction of the middle portion;

when viewed along the second axis, an angle between the rear side portion and the middle portion is between 85 degrees and 95 degrees; and

the driving assembly comprises a magnetic element which is affixed to the middle portion and the rear side portion.

10. The optical element driving mechanism as claimed in claim 6 , wherein the fixed assembly comprises a base;

the optical element driving mechanism further comprises a third circuit assembly configured to be electrically connected to the driving assembly;

a part of the first circuit assembly, the second circuit assembly and the third circuit assembly is disposed in the base; and

the third circuit assembly is electrically independent of the first circuit assembly and the second circuit assembly.

11. The optical element driving mechanism as claimed in claim 10 , wherein the first circuit assembly and the second circuit assembly are disposed on a first side of the base;

the third circuit assembly is disposed on a second side of the base; and

the first side is opposite the second side.

12. The optical element driving mechanism as claimed in claim 11 , wherein

the base has a first engaging groove and a second engaging groove;

when the movable part is located in the first position, the electrical conductive member is engaged with the first engaging groove; and

when the movable part is located in the second position, the electrical conductive member is engaged with the second engaging groove.

13. The optical element driving mechanism as claimed in claim 12 , wherein a first end of the first circuit member and a second end of the second circuit member are exposed from the first engaging groove;

a third end of the third circuit member and a fourth end of the fourth circuit member are exposed from the second engaging groove; and

at least one of the first end, the second end, the third end and the fourth end has an arc structure configured to be in contact with the electrical conductive member.

14. The optical element driving mechanism as claimed in claim 2 , wherein the movable part further includes a main body;

the electrical conductive member has a first conduction portion protruding from the main body along a second axis;

the second axis is perpendicular to the first axis; and

the electrical conductive member has a second conduction portion protruding from the main body along the second axis.

15. The optical element driving mechanism as claimed in claim 14 , wherein the first circuit assembly comprise a first circuit member and a second circuit member, which have a metal material;

the second circuit assembly includes the second circuit member and a third circuit member, and the third circuit member has a metal material;

when the movable part is located in the first position, the first conduction portion is electrically connected to the first circuit member and the second circuit member; and

when the movable part is located in the second position, the second conduction portion is electrically connected to the second circuit member and the third circuit member.

16. The optical element driving mechanism as claimed in claim 15 , wherein the optical element driving mechanism further comprises at least one metal contacting portion disposed on the electrical conductive member or disposed on the first circuit member to the third circuit member; and

the metal contacting portion has a circular arc structure.

17. The optical element driving mechanism as claimed in claim 15 , wherein the fixed assembly comprises a base;

the base has a first engaging groove, a second engaging groove and a third engaging groove;

the movable part has a rear engaging portion;

when the movable part is located in the first position, the second conduction portion is engaged with the first engaging groove, and the rear engaging portion is engaged with the third engaging groove; and

when the movable part is located in the second position, the rear engaging portion is engaged with the second engaging groove.

18. The optical element driving mechanism as claimed in claim 17 , wherein the optical element driving mechanism further comprises a reinforcement assembly, disposed in the base, configured to strengthen overall mechanical strength of the optical element driving mechanism;

a part of the first circuit assembly and the second circuit assembly is disposed in the base; and

the reinforcement assembly is electrically independent from the first circuit assembly and the second circuit assembly.

19. The optical element driving mechanism as claimed in claim 18 , wherein the first circuit assembly and the second circuit assembly are disposed in a first side wall of the base;

the reinforcement assembly is disposed in a second side wall of the base;

the first side wall is opposite the second side wall; and

the base has an inner side surface, and a part of the first circuit assembly and/or the second circuit assembly is exposed from the inner side surface.