US-12625385-B2 - Optical element driving mechanism

US12625385B2US 12625385 B2US12625385 B2US 12625385B2US-12625385-B2

Abstract

An optical element driving mechanism is provided, including a movable part, a fixed part, a driving assembly, and a circuit assembly. The movable part is connected to an optical element. 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 circuit assembly is electrically connected to the driving assembly.

Inventors

Chen-Hung CHAO
Po-Xiang ZHUANG
Chao-Chang Hu
Yi-Ho Chen
SHOU-JEN LIU

Assignees

ACTUTEK CORPORATION

Dates

Publication Date: 20260512
Application Date: 20230713

Claims (19)

1 . An optical element driving mechanism, comprising: a movable part, connected to an optical element; a fixed part, wherein the movable part is movable relative to the fixed part; a driving assembly, driving the movable part to move relative to the fixed part; and a circuit assembly, electrically connected to the driving assembly, comprising a first circuit element and a second circuit element, wherein: the first circuit element is electrically connected to the driving assembly, the second circuit element has a plate-like structure, the second circuit element has a conductive material, the first circuit element and the second circuit element at least partially overlap when viewed along a thickness direction of the second circuit element, an insulating element is disposed between the first circuit element and the second circuit element, the second circuit element is fixed to the movable part via the insulating element, and the insulating element is not in contact with the first circuit element.
2 . The optical element driving mechanism as claimed in claim 1 , wherein the first circuit element comprises: a first circuit element fixed part fixing end; a first circuit element movable part fixing end, opposite to the first circuit element fixed part fixing end; and a first circuit element flexible portion, being flexible, wherein the first circuit element movable part fixing end is elastically connected to the first circuit element fixed part fixing end via the first circuit element flexible portion.
3 . The optical element driving mechanism as claimed in claim 2 , wherein the first circuit element has a plate-like structure, wherein the first circuit element flexible portion has a strip-shaped structure, wherein a minimum width of the first circuit element flexible portion is greater than 0.04 mm, wherein a maximum width of the first circuit element flexible portion is less than 0.5 mm, and wherein the first circuit element has a conductive material.
4 . The optical element driving mechanism as claimed in claim 2 , wherein the first circuit element flexible portion is compressed or extended as the movable part moves relative to the fixed part.
5 . The optical element driving mechanism as claimed in claim 2 , wherein when viewed along a direction that is perpendicular to an optical axis, the first circuit element fixed part fixing end and the first circuit element movable part fixing end do not overlap each other.
6 . The optical element driving mechanism as claimed in claim 1 , wherein; the first circuit element and the second circuit element have different materials, the first circuit element has copper or titanium copper, the second circuit element has stainless steel, and the second circuit element is fixedly disposed on the movable part.
7 . The optical element driving mechanism as claimed in claim 6 , wherein the Young's modulus of the second circuit element is greater than the Young's modulus of the first circuit element.
8 . The optical element driving mechanism as claimed in claim 6 , wherein the circuit assembly further comprises a third circuit element, and the third circuit element is electrically connected to the driving assembly, wherein the driving assembly is electrically connected to the third circuit element via the first circuit element, and wherein the third circuit element comprises a third circuit element electrical connective portion, and the third circuit element electrical connective portion has a plate-like structure.
9 . The optical element driving mechanism as claimed in claim 8 , wherein the fixed part comprises a base, and the base comprises a base first accommodating portion, wherein the base first accommodating portion corresponds to the third circuit element electrical connective portion, wherein a base first accommodating portion surface of the base first accommodating portion faces toward the third circuit element electrical connective portion, and wherein an electrical connective element is disposed between the third circuit element electrical connective portion and the first circuit element fixed part fixing end.
10 . The optical element driving mechanism as claimed in claim 9 , wherein the first circuit element fixed part fixing end is aligned with the third circuit element electrical connective portion, and the electrical connective element is disposed at the area where the first circuit element fixed part fixing end contacts the third circuit element electrical connective portion.
11 . The optical element driving mechanism as claimed in claim 9 , wherein the first circuit element fixed part fixing end protrudes from the third circuit element electrical connective portion, and the electrical connective element is disposed at the area where the first circuit element fixed part fixing end contacts the third circuit element electrical connective portion.
12 . The optical element driving mechanism as claimed in claim 9 , wherein the third circuit element electrical connective portion has a recessed structure, and the electrical connective element is disposed in the recessed structure.
13 . The optical element driving mechanism as claimed in claim 8 , further comprising a protective element disposed below the third circuit element, wherein the fixed part comprises a base, and the base comprises a base second accommodating portion, wherein the base second accommodating portion accommodates the third circuit element and the protective element, wherein the third circuit element is disposed between the base and the protective element, wherein the protective element has a metal material, wherein the protective element has a non-magnetic material, and wherein in an optical axis direction, the base extends downward beyond the protective element.
14 . The optical element driving mechanism as claimed in claim 13 , further comprising an electronic component, and the electronic component comprises a position sensing element, wherein the position sensing element senses the movement of the movable part relative to the fixed part, wherein the position sensing element is disposed on the third circuit element, wherein the protective element comprises a protective element strengthening portion, and the protective element strengthening portion corresponds to the position sensing element, wherein the protective element strengthening portion has a protruding structure, wherein the protective element has a plate-like structure, and wherein when viewed along a thickness direction of the protective element, an area of the protective element strengthening portion is larger than an area of the position sensing element.
15 . The optical element driving mechanism as claimed in claim 8 , wherein the driving assembly comprise: a first driving coil, disposed on the movable part; and a second driving coil, disposed on the movable part, wherein the first circuit element comprises: a first circuit element first portion, connected to the first driving coil; and a first circuit element second portion, connected to the second driving coil, wherein the first driving coil is electrically connected to the second driving coil via the second circuit element.
16 . The optical element driving mechanism as claimed in claim 15 , further comprising an electronic component, and the electronic component comprises an electronic element, wherein the electronic element is disposed on the third circuit element, wherein the electronic element generates an electrical current, wherein the electrical current flows from the electronic element to the third circuit element, the first circuit element first portion, the first driving coil, the second circuit element, the second driving coil, the first circuit element second portion, and the third circuit element.
17 . The optical element driving mechanism as claimed in claim 15 , wherein the second circuit element and the first circuit element first portion do not overlap each other when viewed along an optical axis direction.
18 . The optical element driving mechanism as claimed in claim 15 , wherein the second circuit element is disposed between the first circuit element second portion and the movable part.
19 . The optical element driving mechanism as claimed in claim 18 , wherein when viewed along an optical axis, the movable part, the second circuit element, an insulating element, and the first circuit element second portion at least partially overlap.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims the benefit of U.S. Provisional Application No. 63/388,793, filed Jul. 13, 2022, the entirety of which is incorporated by reference herein. BACKGROUND OF THE INVENTION Field of the Invention The present disclosure relates to an optical element driving mechanism, and more particularly, the present disclosure relates to an optical element driving mechanism for an electronic device. Description of the Related Art As the relevant technologies have been developed, many electronic devices (such as computers and tablets) are equipped with the capability to record images and videos. However, when an optical element (such as lens) having a long focal length is provided in an electronic device, the thickness of the electronic device may be increased, impeding the prospects for miniaturization of the electronic device. Therefore, how to design an optical element driving mechanism and an optical device that may miniaturize the electronic device has become an important issue. BRIEF SUMMARY OF THE INVENTION To solve the problems of the prior art, an optical element driving mechanism, including a movable part, a fixed part, a driving assembly, and a circuit assembly. The movable part is connected to an optical element. 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 circuit assembly is electrically connected to the driving assembly. In one of the embodiments of the present disclosure, the circuit assembly includes a first circuit element electrically connected to the driving assembly, and the first circuit element includes a first circuit element fixed part fixing end, a first circuit element movable part fixing end, and a first circuit element flexible portion. The first circuit element movable part fixing end is opposite to the first circuit element fixed part fixing end. The first circuit element flexible portion is flexible. The first circuit element movable part fixing end is elastically connected to the first circuit element fixed part fixing end via the first circuit element flexible portion. In one of the embodiments of the present disclosure, the first circuit element has a plate-like structure. The first circuit element flexible portion has a strip-shaped structure. A minimum width of the first circuit element flexible portion is greater than 0.04 mm. A maximum width of the first circuit element flexible portion is less than 0.5 mm. The first circuit element has a conductive material. In one of the embodiments of the present disclosure, the first circuit element flexible portion is compressed or extended as the movable part moves relative to the fixed part. In one of the embodiments of the present disclosure, when viewed along a direction that is perpendicular to an optical axis, the first circuit element fixed part fixing end and the first circuit element movable part fixing end do not overlap each other. In one of the embodiments of the present disclosure, the circuit assembly further includes a second circuit element. The first circuit element and the second circuit element have different materials. The first circuit element has copper or titanium copper. The second circuit element has stainless steel. The second circuit element is fixedly disposed on the movable part. In one of the embodiments of the present disclosure, the Young's modulus of the second circuit element is greater than the Young's modulus of the first circuit element. In one of the embodiments of the present disclosure, the second circuit element has a plate-like structure. The second circuit element has a conductive material. The first circuit element and the second circuit element at least partially overlap when viewed along a thickness direction of the second circuit element. An insulating element is disposed between the first circuit element and the second circuit element. The second circuit element is fixed to the movable part via the insulating element. The insulating element is not in contact with the first circuit element. In one of the embodiments of the present disclosure, the circuit assembly further includes a third circuit element, and the third circuit element is electrically connected to the driving assembly. The driving assembly is electrically connected to the third circuit element via the first circuit element. The third circuit element includes a third circuit element electrical connective portion, and the third circuit element electrical connective portion has a plate-like structure. In one of the embodiments of the present disclosure, the fixed part includes a base, and the base includes a base first accommodating portion. The base first accommodating portion corresponds to the third circuit element electrical connective portion. A base first accommodating portion surface of the base first accommodating portion faces toward the third circuit element electrical connect