US 12,224,684 B2
Optical element driving mechanism with piezoelectric driving assembly
Shu-Shan Chen, Taoyuan (TW); and Pai-Jui Cheng, Taoyuan (TW)
Assigned to TDK TAIWAN CORP., Taoyuan (TW)
Filed by TDK TAIWAN CORP., Taoyuan (TW)
Filed on Jul. 15, 2022, as Appl. No. 17/866,190.
Claims priority of provisional application 63/268,573, filed on Feb. 25, 2022.
Prior Publication US 2023/0275530 A1, Aug. 31, 2023
Int. Cl. H02N 2/12 (2006.01); G03B 17/56 (2021.01); H02N 2/14 (2006.01)
CPC H02N 2/12 (2013.01) [G03B 17/561 (2013.01); H02N 2/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An optical element driving mechanism, comprising:
a fixed portion;
a movable portion connected to an optical assembly; and
a driving assembly driving the movable portion to move relative to the fixed portion;
wherein the driving assembly comprises a piezoelectric element;
wherein the piezoelectric element comprises:
a piezoelectric unit;
a guiding element, wherein a first end of the guiding element is connected to the piezoelectric unit, and a second end is connected to the fixed portion; and
a counterweight element connected to the piezoelectric unit, wherein the piezoelectric unit is disposed between the guiding element and the counterweight element;
wherein the fixed portion comprises a bottom, wherein the bottom has:
a first through hole, corresponding to the piezoelectric unit and the counterweight element, accommodating a part of the piezoelectric unit and the counterweight element, and substantially having a rectangular profile; and
a second through hole, corresponding to the guiding element, accommodating the second end of the guiding element, and substantially having a circular profile.