US 12,461,428 B2
Optical element driving mechanism
Pai-Jui Cheng, Taoyuan (TW); Shu-Shan Chen, Taoyuan (TW); Hsiao-Hsin Hu, Taoyuan (TW); and Chieh-An Chang, Taoyuan (TW)
Assigned to TDK CORPORATION, Tokyo (JP)
Filed by TDK CORPORATION, Tokyo (JP)
Filed on Jan. 18, 2023, as Appl. No. 18/156,132.
Claims priority of provisional application 63/301,836, filed on Jan. 21, 2022.
Prior Publication US 2023/0236386 A1, Jul. 27, 2023
Int. Cl. G02B 7/09 (2021.01); G02B 7/08 (2021.01); G02B 27/64 (2006.01); G03B 9/36 (2021.01)
CPC G03B 9/36 (2013.01) [G02B 7/09 (2013.01); G02B 27/646 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical element driving mechanism, comprising:
a fixed assembly;
a movable part, configured to be connected to an optical element and being movable relative to the fixed assembly;
a driving assembly, configured to drive the movable part to move relative to the fixed assembly, wherein the driving assembly includes a counterweight, a driving member, and a piezoelectric element fixedly connected between the counterweight and the driving member; and
a coupling assembly, wherein the movable part is movable relative to the fixed assembly by the coupling assembly; wherein
the optical element driving mechanism further includes a guiding assembly configured to guide the movable part along a first axis;
the guiding assembly includes a first guiding member which is affixed to the fixed assembly;
the first guiding member has a long strip-shaped structure extending along the first axis;
the coupling assembly includes a first elastic member and a second elastic member;
the first elastic member and the second elastic member each have a plate-shaped structure;
the first elastic member is affixed to the movable part;
the coupling assembly further includes a third elastic member and a fourth elastic member;
the third elastic member and the fourth elastic member each have a plate-shaped structure;
the third elastic member and the first elastic member are configured to be in contact with the driving member of the driving assembly to hold the driving member;
the fourth elastic member and the second elastic member are configured to be in contact with the first guiding member so as to hold the first guiding member;
when viewed along the first axis, the fourth elastic member has a fourth left-side portion, a fourth middle portion and a fourth right-side portion;
the fourth middle portion is connected between the fourth left-side portion and the fourth right-side portion;
the fourth left-side portion extends along a second axis;
the fourth right-side portion extends along a third axis;
the fourth left-side portion and the fourth right-side portion are configured to be in contact with the first guiding member;
the fourth middle portion does not contact the first guiding member;
when viewed along the first axis, the fourth middle portion overlaps a portion of the movable part.