CN-118112741-B - Optical element driving device, camera module, and camera mounting device

Abstract

The invention provides an optical element driving device, a camera module and a camera mounting device, which can stabilize electrical connectivity. The optical element driving device includes a movable portion capable of holding an optical element, a tubular housing portion surrounding an outer periphery of the movable portion and housing the movable portion and having a rectangular shape in plan view, a fixed portion disposed on one side in an optical axis direction with respect to the movable portion and the housing portion, a plate spring member supporting the movable portion so that the movable portion is movable in the optical axis direction with respect to the housing portion, and a wire member supporting the housing portion so that the housing portion is movable in an orthogonal direction with respect to the fixed portion, wherein the wire member is configured such that a wire group composed of at least 2 wire members is connected to a common plate spring member at each of four corners of the housing portion.

Inventors

• TAKIMOTO YUKIHIRO
• ARANAI MASAHIKO

Assignees

• 三美电机株式会社

Dates

Publication Date

20260512

Application Date

20231128

Priority Date

20221130

Claims (6)

1. 1. An optical element driving device is characterized by comprising: a movable unit capable of holding an optical element; a cylindrical accommodating portion having a rectangular shape in a plan view, surrounding an outer periphery of the movable portion, and accommodating the movable portion; A fixed portion disposed on one side in an optical axis direction with respect to the movable portion and the accommodating portion; a leaf spring member supporting the movable portion so that the movable portion can move in the optical axis direction with respect to the accommodating portion, and A wire member supporting the accommodating portion so that the accommodating portion can move in a direction perpendicular to an optical axis with respect to the fixing portion, The wire members are arranged as a wire group of 2 or more wire members at each of four corners of the housing portion, and the 2 or more wire members are connected to a common linear joint portion at each corner via a plurality of bridging portions extending radially inward perpendicularly from the common linear joint portion, thereby being connected to the common plate spring member.
2. 2. The optical element driving apparatus according to claim 1, wherein, The leaf spring member has two extensions at each corner connected to the receiving portion and extending along adjacent two sides of the receiving portion, The linear coupling portion couples the two extension portions to each other at each corner portion.
3. 3. The optical element driving apparatus according to claim 1, wherein, The plurality of bridging portions are formed such that a width in a direction intersecting a direction connecting the linear joint portion and the wire member is a constant width.
4. 4. The optical element driving apparatus according to claim 1, wherein, The linear joint portion extends linearly in the direction in which the 2 or more wire members are arranged.
5. 5. A camera module, comprising: the optical element driving device of claim 1; the optical element, and And an imaging unit that images an object image formed by the optical element.
6. 6. A camera mounting apparatus which is an information device or a transportation device, comprising: the camera module of claim 5, and And an image processing unit that processes image information obtained by the camera module.

Description

Optical element driving device, camera module, and camera mounting device Technical Field The invention relates to an optical element driving device, a camera module and a camera mounting device. Background In general, a small-sized camera module is mounted in a mobile terminal such as a smart phone. An optical element driving device that drives an optical element is used in such a camera module. The optical element driving device has an autofocus function (hereinafter referred to as "AF function", AF: auto Focus) and a shake correction function (hereinafter referred to as "OIS function", OIS: optical Image Stabilization, optical anti-shake). The optical element driving device automatically focuses when photographing an object by an AF function, and optically corrects shake (vibration) generated during photographing by an OIS function to reduce image blur. For example, patent document 1 discloses an optical element driving device having an AF function and an OIS function. The optical element driving device disclosed in patent document 1 includes a movable portion that holds an optical element and has a coil, a rectangular-prism-shaped housing portion that has a magnet and houses the movable portion so that the movable portion can move in a direction of an optical axis (optical axis direction), and a fixed portion that supports the movable portion and the housing portion so that the movable portion and the housing portion can move in a direction intersecting the optical axis (optical axis orthogonal direction). The optical element driving device described in patent document 1, for example, includes a plate spring member that is mounted on the housing portion and supports the movable portion from an opening side in an upper direction of the movable portion, and 2 wire members that extend between the fixed portion and the plate spring member in correspondence with each of four corners of the housing portion, respectively, and support the housing portion. Further, at each of the four corners of the accommodating portion, 2 wire members are connected to different leaf spring members, respectively. Problems to be solved by the invention However, in the optical element driving device described in patent document 1, 2 wire members are connected to different leaf spring members at each of four corners of the housing portion, and therefore the wire members at the corners have different electrical paths. Since the wire members are displaced at the corners, there is a possibility that the wire members may contact each other, and there is a risk of short circuit or the like. Prior art literature Patent literature Japanese patent application laid-open No. 2016-180836 Disclosure of Invention The invention aims to provide an optical element driving device, a camera module and a camera mounting device which can stabilize electric connectivity. Solution to the problem An optical element driving device according to one embodiment of the present invention includes a movable portion capable of holding an optical element, a tubular housing portion having a rectangular shape in a plan view and surrounding an outer periphery of the movable portion and housing the movable portion, a fixed portion disposed on one side in an optical axis direction with respect to the movable portion and the housing portion, a plate spring member supporting the movable portion so that the movable portion is movable in the optical axis direction with respect to the housing portion, and a wire member supporting the housing portion so that the housing portion is movable in a direction orthogonal to an optical axis with respect to the fixed portion, wherein the wire member is configured such that a wire group composed of 2 or more wire members is connected to a common plate spring member at each of four corners of the housing portion. As one embodiment of the camera module of the present invention, the camera module includes the optical element driving device, the optical element, and an imaging unit that images an object image formed by the optical element. As one embodiment of the camera mounting apparatus of the present invention, the camera mounting apparatus is an information device or a transportation device, and includes the camera module described above, and an image processing unit that processes image information obtained by the camera module. Effects of the invention According to the present invention, electrical connectivity can be stabilized. Drawings Fig. 1A is a front view of an example of a camera mounting device on which a camera module according to an embodiment of the present invention is mounted, and fig. 1B is a rear view of an example of the camera mounting device according to an embodiment of the present invention. Fig. 2A is a front view of another example of a camera mounting device on which a camera module according to an embodiment of the present invention is mounted, and fig. 2B is a perspective view of another example of the c