A driving device for optical image stabilization of camera

Abstract

The invention discloses a camera optical image stabilization driving device, comprising a fixed seat, a metal plate, a movable plate, a lens module, an SMA wire and an elastic arm, wherein the metal plate is fixedly mounted on the top surface of the fixed seat, a movable plate is arranged parallel to the top of the metal plate, the lens module is mounted on the top surface of the movable plate in cooperation, mounting columns are arranged at the top corner positions of the upper surface of the fixed seat, elastic arms are arranged at the four corners of the lens module, and two ends of the elastic arms are respectively fitted and fixed to the lens module and the mounting columns, SMA wires are arranged at the four sides of the movable plate, and two ends of the SMA wires are respectively fixedly connected to the metal plate and the movable plate, and the camera optical image stabilization driving device drives the lens module to move in an XY plane through the elastic suspension of the lens module by the elastic arm and the contraction and deformation of the SMA wire, thereby realizing the optical image stabilization of the lens module.

Description

Technical Field

[0001] The present invention relates to the field of OIS technology, and in particular to a camera optical image stabilization driving device. Background Art

[0002] Optical image stabilization is the most recognized anti-shake technology by the public. It compensates for the optical path caused by hand shake through movable components, thereby reducing the blur of photos. However, the anti-shake structure of current mobile phone cameras is relatively complex and has low stability. Therefore, we propose a camera optical image stabilization drive device. Summary of the invention

[0003] The object of the present invention is to provide a camera optical image stabilization driving device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a driving device for optical image stabilization of a camera, comprising a fixed seat, a metal plate, a movable plate, a lens module, an SMA wire and an elastic arm, wherein a metal plate is fixedly mounted on the top surface of the fixed seat, a movable plate is arranged parallel to the top of the metal plate, a lens module is mounted on the top surface of the movable plate, mounting columns are arranged at the top corners of the upper surface of the fixed seat, elastic arms are arranged at the four corners of the lens module, and two ends of the elastic arms are respectively fitted and fixed to the lens module and the mounting columns, SMA wires are arranged on the four sides of the movable plate, and the two ends of the SMA wires are respectively fixedly connected to the metal plate and the movable plate.

[0005] Preferably, the elastic arm comprises a connecting block connected to the lens module, a connecting block connected to the mounting column, and an elastic part in the middle, and the elastic part in the middle of the elastic arm is formed by bending.

[0006] Preferably, a metal terminal connected to the outside is provided in the fixing base, and the elastic arm realizes signal connection with the external module through the metal terminal provided in the fixing base.

[0007] Preferably, the bottom of the lens module is connected to the movable plate, and the movable plate realizes signal connection with the external module through the lens module connected thereto and the elastic arm connected to the lens module.

[0008] Preferably, the two connecting blocks of the elastic arm are in the same plane.

[0009] Preferably, a through hole is formed on one side of the fixing seat.

[0010] Preferably, the metal plate is composed of one or more pieces of metal, and the terminals provided on the metal plate pass through the fixing seat to realize circuit connection with the external module.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the lens module and the movable plate are fixed as one, and the lens module is directly fixed by the elastic arm, which facilitates the movement of the lens module along the X-axis and the Y-axis. The lens module is suspended on the top of the fixed seat to ensure that no friction is generated when the lens module moves in a plane. In conjunction with the heat shrinkage characteristics of the SMA wire, the lens module is driven to achieve OIS. The driving device of the optical image stabilization of this camera elastically suspends the lens module through the elastic arm and drives the lens module to move in the XY plane through the contraction and deformation of the SMA wire, thereby achieving optical image stabilization of the lens module. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the structure of the movable plate of the present invention;

[0014] Figure 3 It is a schematic diagram of the elastic arm structure of the present invention.

[0015] In the figure: 1. fixing seat; 2. metal plate; 3. movable plate; 4. lens module; 5. through hole; 6. SMA wire; 7. elastic arm. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-3 The present invention provides a technical solution: a driving device for optical image stabilization of a camera, comprising a fixed seat, a metal plate, a movable plate, a lens module, an SMA wire and an elastic arm, wherein a metal plate is fixedly mounted on the top surface of the fixed seat, a movable plate is arranged parallel to the top of the metal plate, a lens module is mounted on the top surface of the movable plate in coordination with the movable plate, mounting columns are arranged at the top corner positions of the upper surface of the fixed seat, elastic arms are arranged at the four corner positions of the lens module, and two ends of the elastic arms are respectively fitted and fixed with the lens module and the mounting columns, SMA wires are arranged at the four sides of the movable plate, and two ends of the SMA wires are respectively fixedly connected with the metal plate and the movable plate.

[0018] The lens module is fixed to the movable plate as a whole. The lens module is directly fixed by the elastic arm to facilitate the movement of the lens module along the X-axis and Y-axis. The lens module is suspended on the top of the fixed seat to ensure that no friction is generated when the lens module moves in a plane. Combined with the heat-shrinking characteristics of the SMA wire, the lens module is driven to achieve OIS.

[0019] The elastic arm includes a connecting block connected to the lens module, a connecting block connected to the mounting column, and an elastic part in the middle. The elastic part in the middle of the elastic arm is formed by bending, has stable force, and is easy to produce. It ensures that the fixed part and the movable part of the plate are in the same plane and will not be affected by the bending accuracy.

[0020] The fixing base is provided with a metal terminal connected to the outside, and the elastic arm realizes signal connection with the external module through the metal terminal provided in the fixing base.

[0021] The bottom of the lens module is connected to the movable plate, and the movable plate realizes signal connection with the external module through the lens module connected thereto and the elastic arm connected to the lens module.

[0022] The two connecting blocks of the elastic arm are in the same plane, which facilitates the stable packaging of the top of the lens module.

[0023] A through hole is provided on one side of the fixing seat to facilitate the insertion and connection of the pins of the metal plate.

[0024] The metal plate is composed of one or more pieces of metal, and the terminals arranged on the metal plate pass through the fixing seat to realize circuit connection with the external module.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A camera optical image stabilization drive device, comprising a fixed seat (1), a metal plate (2), a movable plate (3), a lens module (4), an SMA wire (6) and an elastic arm (7), Features: A metal plate (2) is fixedly mounted on the top surface of the fixing seat (1), a movable plate (3) is arranged parallel to the top of the metal plate (2), a lens module (4) is mounted on the top surface of the movable plate (3), the lens module (4) and the movable plate (3) are fixed as a whole, mounting columns are arranged at the top corner positions of the upper surface of the fixing seat (1), elastic arms (7) are arranged at the four corners of the lens module (4), and the two ends of the elastic arms (7) are respectively fitted and fixed to the lens module (4) and the mounting columns, SMA wires (6) are arranged on the four sides of the movable plate (3), and the two ends of the SMA wires (6) are respectively fixedly connected to the metal plate (2) and the movable plate (3); the lens module (4) is suspended on the top of the fixing seat (1); The elastic arm (7) comprises a connection block connected to the lens module (4), a connection block connected to the mounting post, and an elastic portion in the middle, and the elastic portion in the middle of the elastic arm (7) is formed by bending so that the connection block connecting the elastic arm (7) and the lens module (4) and the connection block connecting the elastic arm (7) and the mounting post are in the same plane.

2. A camera optical image stabilization driving device according to claim 1, Features: The fixing seat (1) is provided with a metal terminal connected to the outside, and the elastic arm (7) realizes signal connection with the external module through the metal terminal provided in the fixing seat (1).

3. A camera optical image stabilization driving device according to claim 1, Features: The bottom of the lens module (4) is connected to the movable plate (3), and the movable plate (3) realizes signal connection with the external module through the lens module (4) connected thereto and the elastic arm (7) connected to the lens module (4).

4. A camera optical image stabilization driving device according to claim 1, Features: A through hole (5) is formed on one side of the fixing seat (1).

5. A camera optical image stabilization driving device according to claim 1, Features: The metal plate (2) is composed of one or more pieces of metal, and the terminals provided on the metal plate (2) pass through the fixing seat (1) to achieve circuit connection with the external module.

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