OPTICAL ELEMENT DRIVING MECHANISM
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion used for connecting an optical element, a fixed portion, and a driving assembly used for driving the movable portion to move relative to the fixed portion. The movable portion is movable relative to the fixed portion.
1 . An optical element driving mechanism, comprising:
a movable portion used for connecting an optical element;
a fixed portion, wherein the movable portion is movable relative to the fixed portion; and
a driving assembly used for driving the movable portion to move relative to the fixed portion.
2 . The optical element driving mechanism as claimed in claim 1 , wherein:
the movable portion comprises a holder and a blade assembly;
the blade assembly comprises a first blade and a second blade;
the blade assembly defines a blade opening;
the movable portion and the fixed portion are arranged along a main axis;
the main axis penetrates the blade opening;
the main axis extends in a first axis.
3 . The optical element driving mechanism as claimed in claim 2 , wherein:
the first blade and the second blade at least partially overlap each other in the first axis;
the first blade does not overlap the second blade when viewed in a direction perpendicular to the main axis.
4 . The optical element driving mechanism as claimed in claim 3 , further comprising:
a first low-reflection element disposed on the fixed portion; and
a second low-reflection element disposed on the movable portion.
5 . The optical element driving mechanism as claimed in claim 4 , wherein:
the first blade comprises a segment;
the second blade comprises a segment;
the blade opening is defined by the segment of the first blade and the segment of the second blade.
6 . The optical element driving mechanism as claimed in claim 5 , wherein the segment of the first blade or the segment of the second blade has a straight shape or an arc shape.
7 . The optical element driving mechanism as claimed in claim 6 , wherein:
the first low-reflection element and the second low-reflection element are arranged in the first axis;
the first low-reflection element comprises a first opening when viewed along the first axis;
the second low-reflection element comprises a second opening when viewed along the first axis;
at least a portion of the second low-reflection element is exposed from the first low-reflection element when viewed along the first axis.
8 . The optical element driving mechanism as claimed in claim 7 , wherein:
the first opening and the second opening are greater than the blade opening in a first state;
at least a portion of the blade assembly is exposed from the first opening in the first state when viewed along the first axis.
9 . The optical element driving mechanism as claimed in claim 7 , wherein:
at least one of the first opening and the second opening is smaller than the blade opening in a second state;
the blade assembly is not exposed from the first opening in the second state when viewed along the first axis.
10 . The optical element driving mechanism as claimed in claim 7 , further comprising a support assembly disposed between the movable portion and the fixed portion, wherein:
the second opening has a circular shape;
the main axis extends in a first axis and passes through a center of the second opening.
11 . The optical element driving mechanism as claimed in claim 10 , wherein:
the support assembly comprises a first support element and a second support element arranged along a second axis;
the first axis and the second axis are perpendicular when viewed along the main axis.
12 . The optical element driving mechanism as claimed in claim 11 , wherein:
a virtual plane overlaps the main axis;
the first support element and the second support element are disposed on an identical side of the virtual plane.
13 . The optical element driving mechanism as claimed in claim 12 , wherein:
a connection of the first support element and the center and a connection of the center and the second support element defines an angle when viewed along the main axis;
the angle is between 16 degrees and 164 degrees.
14 . The optical element driving mechanism as claimed in claim 13 , wherein:
the movable portion comprises an extending portion when viewed along the second axis;
at least a portion of the extending portion overlaps the support assembly along the first axis.
15 . The optical element driving mechanism as claimed in claim 14 , wherein at least a portion of the support assembly is exposed from the extending portion when viewed along the first axis.
16 . The optical element driving mechanism as claimed in claim 15 , wherein:
the fixed portion comprises a bottom;
the support assembly is disposed on a support surface of the bottom;
a distance between the support surface and the extending portion is greater than a height of the first support element in the first axis.
17 . The optical element driving mechanism as claimed in claim 16 , wherein:
a gap greater than zero is between the first support element and the support surface or between the first support element and the extending portion;
the gap is less than a distance between the support surface and the extending portion.
18 . The optical element driving mechanism as claimed in claim 17 , further comprising a lubricating element disposed between the support assembly and the fixed portion;
the lubricating element comprises lubricating oil or Teflon.
19 . The optical element driving mechanism as claimed in claim 18 , wherein:
the extending portion and the support surface do not overlap each other in the first axis.
20 . The optical element driving mechanism as claimed in claim 19 , wherein:
the first support element comprises a first support unit and a second support unit arranged along the first axis;
the first support unit and the second support unit are spherical;
the first support unit and the second support unit are in direct contact with the fixed portion and the movable portion.