Optical element driving mechanism
An optical element driving mechanism is provided, including: a fixed part, a movable part, and a driving assembly. The movable part is movable relative to the fixed part. The driving assembly drives the movable part to move relative to the fixed part. The driving assembly includes a driving magnetic element and a driving coil, and the driving magnetic element corresponds to the driving coil.
1 . An optical element driving mechanism, comprising:
a fixed part comprising a frame;
a movable part, movable relative to the fixed part, the movable part holds an optical element having an optical axis; and
a driving assembly, driving the movable part to move relative to the fixed part,
wherein the driving assembly comprises a driving magnetic element and a driving coil, and the driving magnetic element corresponds to the driving coil,
wherein the movable part comprises an optical element holder and a photosensitive element holder, the driving magnetic element comprises a first driving magnetic element and a second driving magnetic element, and the driving coil comprises an optical element holder driving coil, photosensitive element holder first driving coil and a photosensitive element holder second driving coil,
wherein the optical element holder driving coil is disposed on the optical element holder and corresponds to the first driving magnetic element;
wherein the driving assembly further comprises a first driving magnetic element conductive sheet,
wherein the first driving magnetic element conductive sheet is disposed between the optical element holder driving coil and the optical element holder, and the optical element holder driving coil is fixedly disposed on the first driving magnetic element conductive sheet, and
wherein the first driving magnetic element conductive sheet positionally corresponds to the first driving magnetic element;
wherein the optical element holder comprises an optical element holder body and an optical element holder stopping element, the optical element holder stopping element extends from the optical element holder body toward the frame, and the optical element holder stopping element partially overlaps the frame when viewed along the optical axis,
wherein along the optical axis, the shortest distance between the optical element holder stopping element and the frame is shorter than the shortest distance between the optical element holder body and the photosensitive element holder;
wherein the optical element holder driving coil comprises a winding axis perpendicular to the optical axis,
wherein the optical element holder driving coil partially overlaps with the optical element holder stopping element when viewed along a direction perpendicular to both the winding axis and the optical axis;
wherein a driving assembly center of the driving assembly does not overlap an optical element driving mechanism center of the optical element driving mechanism when viewed along the optical axis;
wherein the first driving magnetic element positionally corresponds to the optical element holder driving coil, the photosensitive element holder first driving coil and the photosensitive element holder second driving coil;
wherein a shortest distance between the first driving magnetic element and the optical element holder is greater than a shortest distance between the second driving magnetic element and the optical element holder.
2 . The optical element driving mechanism as claimed in claim 1 ,
wherein the photosensitive element holder first driving coil and the photosensitive element holder second driving coil are disposed on the photosensitive element holder,
wherein the photosensitive element holder first driving coil and the photosensitive element holder second driving coil correspond to the first driving magnetic element.
3 . The optical element driving mechanism as claimed in claim 2 ,
wherein the photosensitive element holder first driving coil and the photosensitive element holder second driving coil correspond to the second driving magnetic element.
4 . The optical element driving mechanism as claimed in claim 3 , wherein the driving coil further comprises an optical element holder second driving coil,
wherein the optical element holder second driving coil is disposed on the optical element holder and corresponds to the second driving magnetic element.
5 . The optical element driving mechanism as claimed in claim 3 , wherein the first driving magnetic element and the second driving magnetic element are respectively disposed on two opposite sides of the optical element driving mechanism.
6 . The optical element driving mechanism as claimed in claim 3 , wherein a magnetic force emitting surface of the first driving magnetic element is parallel to an optical axis, and a magnetic force emitting surface of the second driving magnetic element is perpendicular to the optical axis.
7 . The optical element driving mechanism as claimed in claim 6 , further comprising a sensing element,
wherein the sensing element corresponds to the magnetic force emitting surface of the first driving magnetic element.
8 . The optical element driving mechanism as claimed in claim 3 , wherein the direction of the current of the photosensitive element holder first driving coil and the direction of the current of the photosensitive element holder second driving coil are the same when viewed along the optical axis.
9 . The optical element driving mechanism as claimed in claim 3 , wherein the direction of the current of the photosensitive element holder first driving coil and the direction of the current of the photosensitive element holder second driving coil are different when viewed along the optical axis.
10 . The optical element driving mechanism as claimed in claim 1 , wherein the driving magnetic element further comprises a second driving magnetic element, wherein the driving coil is not disposed between the second driving magnetic element and the optical element holder.
11 . The optical element driving mechanism as claimed in claim 3 , wherein the first driving magnetic element is disposed on a first side of the optical element driving mechanism,
wherein the second driving magnetic element is disposed on a second side of the optical element driving mechanism,
wherein the first side is opposite to the second side.
12 . The optical element driving mechanism as claimed in claim 11 , wherein the movable part comprises an optical element holder guiding element,
wherein the optical element holder guiding element is disposed on the first side of the optical element driving mechanism.
13 . The optical element driving mechanism as claimed in claim 11 , wherein the driving magnetic element further comprises a third driving magnetic element, and the driving coil further comprises a photosensitive element holder third driving coil,
wherein the photosensitive element holder third driving coil is disposed on the photosensitive element holder,
wherein the photosensitive element holder third driving coil corresponds to the third driving magnetic element,
wherein the third driving magnetic element is disposed on a third side of the optical element driving mechanism.
14 . The optical element driving mechanism as claimed in claim 13 , wherein a magnetic force emitting surface of the third driving magnetic element is perpendicular to an optical axis.
15 . The optical element driving mechanism as claimed in claim 1 , wherein the driving magnetic element further comprises a third driving magnetic element, wherein the driving coil is not disposed between the third driving magnetic element and the optical element holder.
16 . The optical element driving mechanism as claimed in claim 13 , wherein the shortest distance between the third driving magnetic element and the first driving magnetic element is greater than the shortest distance between the third driving magnetic element and the second driving magnetic element when viewed along an optical axis.
17 . The optical element driving mechanism as claimed in claim 13 , wherein the shortest distance between the first driving magnetic element and the optical element holder is greater than the shortest distance between the third driving magnetic element and the optical element holder.