Optical element driving mechanism
An optical element driving mechanism used for driving an optical element is provided. The optical element driving mechanism includes a fixed portion and a support assembly. The optical element is movable in a first dimension relative to the fixed portion through the support assembly.
1 . An optical element driving mechanism used for driving an optical element, comprising:
a fixed portion;
a support assembly, wherein the optical element is movable relative to the fixed portion in a first dimension through the support assembly, and the support assembly comprises:
a first fixed end affixed on the optical element;
a second fixed end affixed on the fixed portion;
an intermediate connecting portion between the first fixed end and the second fixed end, comprising:
a third portion extending in a direction parallel to the first axis;
a fourth portion extending in the direction parallel to the first axis;
a first dodging portion positioned at the third portion and corresponding to the first fixed end; and
a second dodging portion positioned at the fourth portion and corresponding to the first fixed end, wherein in a top view, the optical element is disposed between the first dodging portion and the second dodging portion, and the first dodging portion and the second dodging portion recessed in directions away from the optical element;
a first resilient portion, wherein the intermediate connecting portion movably connects to the second fixed end through the first resilient portion;
a second resilient portion, wherein the first fixed end movably connects to the intermediate connecting portion through the second resilient portion;
a third resilient portion, wherein the intermediate connecting portion movably connects to the second fixed end through the third resilient portion; and
a driving assembly configured to drive the support assembly relative to the fixed portion.
2 . The optical element driving mechanism as claimed in claim 1 ,
wherein the driving assembly comprises:
a coil;
a first magnetic element corresponding to the coil; and
a second magnetic element corresponding to the coil;
wherein:
the first dimension is rotation relative to a first rotational axis;
the first rotational axis is parallel to a first axis;
the first magnetic element and the second magnetic element are arranged along a second axis; and
the second axis is perpendicular to the first axis.
3 . The optical element driving mechanism as claimed in claim 2 , wherein:
a winding axis of the coil is parallel to a third axis;
the first axis, the second axis, and the third axis are perpendicular with each other;
the coil comprises a first segment extending along the first axis and corresponding to the first magnetic element;
the first magnetic element comprises a first magnetic element surface facing the second magnetic element; and
the first segment at least partially overlaps the first magnetic element surface when viewed in a first direction.
4 . The optical element driving mechanism as claimed in claim 3 , wherein the driving assembly further comprises:
a third magnetic element corresponding to the coil; and
a fourth magnetic element corresponding to the coil;
wherein:
the third magnetic element corresponds to the first segment;
the fourth magnetic element corresponds to the first segment; and
the third magnetic element and the fourth magnetic element are arranged in a direction that is parallel to the first axis.
5 . The optical element driving mechanism as claimed in claim 4 , wherein:
at least a portion of the third magnetic element overlaps the first magnetic element when viewed in the first direction;
at least a portion of the fourth magnetic element overlaps the first magnetic element when viewed in the first direction;
a third magnetic element surface of the third magnetic element and the first magnetic element surface face in an identical direction; and
at least a portion of the first segment overlaps the third magnetic element surface when viewed in the first direction.
6 . The optical element driving mechanism as claimed in claim 5 , wherein:
the support assembly is between the first magnetic element and the third magnetic element when viewed along the first axis;
a center of the first magnetic element and a center of the third magnetic element do not overlap each other when viewed in the first direction;
in the first axis, a maximum size of the first magnetic element is different from a maximum size of the third magnetic element;
in the second axis, a maximum size of the first magnetic element is different from a maximum size of the third magnetic element; and
in the third axis, a maximum size of the first magnetic element is different from a maximum size of the third magnetic element.
7 . The optical element driving mechanism as claimed in claim 6 , wherein:
in the first axis, the maximum size of the first magnetic element is greater than the maximum size of the third magnetic element;
in the second axis, the maximum size of the first magnetic element is greater than the maximum size of the third magnetic element; and
in the third axis, the maximum size of the first magnetic element is greater than the maximum size of the third magnetic element.
8 . The optical element driving mechanism as claimed in claim 7 , wherein:
an N pole and a S pole of the first magnetic element are arranged in a first pole direction;
the first pole direction is parallel to the third axis;
an N pole and a S pole of the second magnetic element are arranged in a direction parallel to the first pole direction; and
an N pole and a S pole of the third magnetic element are arranged in a direction parallel to the first pole direction.
9 . The optical element driving mechanism as claimed in claim 8 , wherein:
the N pole and the S pole of the second magnetic element are arranged in a direction opposite to the first pole direction;
the N pole and the S pole of the third magnetic element are arranged in a direction identical to the first pole direction; and
at least a portion of the third magnetic element protrudes from the first magnetic element and does not overlap the first magnetic element when viewed in the first direction.
10 . The optical element driving mechanism as claimed in claim 9 , wherein:
the first resilient portion and the second resilient portion have different elastic coefficients;
the support assembly is plate-shaped; and
the intermediate connecting portion further comprises:
a first portion extending in a direction parallel to the second axis;
a second portion extending in the direction parallel to the second axis.
11 . The optical element driving mechanism as claimed in claim 10 , wherein:
the intermediate connecting portion surrounds the first fixed end;
the first dodging portion has a concave structure;
the first dodging portion and the second dodging portion are arranged in a direction parallel to the second axis; and
the first portion connects to the second portion through the third portion and the fourth portion.
12 . The optical element driving mechanism as claimed in claim 11 , wherein the fixed portion comprises:
a bottom; and
a case affixed on the bottom;
wherein:
the elastic coefficient of the first resilient portion is less than the elastic coefficient of the second resilient portion;
the first magnetic element is affixed on the bottom; and
the third magnetic element is affixed on the case.
13 . The optical element driving mechanism as claimed in claim 12 , wherein the bottom comprises:
a first recess, wherein the optical element at least partially overlaps the first recess when viewed in the first direction;
a second recess used for accommodating the first magnetic element;
a third recess used for accommodating the second magnetic element;
a fourth recess, wherein the first resilient portion at least partially overlaps the fourth recess when viewed in the first direction;
a fifth recess, wherein the third resilient portion at least partially overlaps the fifth recess when viewed in the first direction; and
a first spacing portion between the first magnetic element and the second magnetic element.
14 . The optical element driving mechanism as claimed in claim 13 , wherein:
the second recess is formed in the first recess;
the third recess is formed in the first recess;
the fourth recess is formed in the first recess;
the fifth recess is formed in the first recess;
a first spacing portion surface of the first spacing portion faces the optical element;
a first top surface of the first magnetic element is between the first spacing portion surface and the optical element viewed in along the first axis;
the first top surface and the first spacing portion surface face an identical direction; and
at least a portion of the first spacing portion overlaps the optical element when viewed in the first direction.
15 . The optical element driving mechanism as claimed in claim 14 , wherein:
the bottom further comprises a first through hole having a through structure;
the coil comprises a lead wire, wherein at least a portion of the lead wire is in the first through hole;
the first through hole is formed in the first recess; and
the first through hole is formed in the fourth recess.
16 . The optical element driving mechanism as claimed in claim 15 , further comprising a resilient adhesive element;
wherein:
the lead wire movably connects to the bottom through the resilient adhesive element; and
at least a portion of the resilient adhesive element is in the first through hole.
17 . The optical element driving mechanism as claimed in claim 16 , wherein the case comprises:
an opening corresponding to the optical element;
a sixth recess used for accommodating the third magnetic element;
a seventh recess used for accommodating the fourth magnetic element;
a second spacing portion between the third magnetic element and the fourth magnetic element; and
a block wall corresponding to the third magnetic element.
18 . The optical element driving mechanism as claimed in claim 17 , wherein:
at least a portion of the third magnetic element overlaps the opening when viewed in the first direction;
the sixth recess is adjacent to the opening; and
the second spacing portion is adjacent to the opening.
19 . The optical element driving mechanism as claimed in claim 18 , wherein:
at least a portion of the second spacing portion overlaps the support assembly when viewed in the first direction;
the block wall is between the first magnetic element and the third magnetic element; and at least a portion of the block wall overlaps the support assembly in the first direction.