A circuit for an optical image stabilization driving device

Abstract

The present invention discloses a circuit for an optical image stabilization driving device, which includes a fixing plate, a metal plate, a movable plate, an FPC, a cushion block, an elastic arm and an SMA wire. The metal plate is fixedly attached to the top surface of the fixing plate. The movable plate is arranged in parallel above the metal plate, and the FPC is attached and installed on the surface of the movable plate. Elastic arms are integrally fixed at the four corner positions of the movable plate, and the bottom ends of the elastic arms are fixedly connected to the fixing plate through cushion blocks. The circuit of this optical image stabilization driving device suspends the movable plate and the FPC on the surface of the fixing plate, so that the lens module is suspended and installed. Through the heat shrinkage of the SMA wire, the movement of the camera in the XY plane is realized. In the present invention, no supporting components are required under the movable plate, avoiding the influence of friction, making the planar movement of the camera module stable and agile, and having a stable anti-shake effect.

Description

Technical Field

[0001] The present invention relates to the technical field of OIS for mobile phone cameras, and specifically to a circuit for an optical image stabilization driving device. Background Art

[0002] Optical image stabilization refers to, in a camera or other similar imaging instrument, through the setting of optical components, such as lens setting, to avoid or reduce the instrument jitter phenomenon that occurs during the process of capturing optical signals, thereby improving the imaging quality.

[0003] The camera function of mobile phones has brought great changes to modern life. In the early days, the imaging technology was relatively backward, and it was easy to shake during shooting, resulting in unclear shooting. Now the OIS technology has been improved, increasing the clarity of taking pictures. However, the current anti-shake effect still has not reached a highly reasonable level. Therefore, we propose a circuit for an optical image stabilization driving device. Summary of the Invention

[0004] The purpose of the present invention is to provide a circuit for an optical image stabilization driving device to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A circuit for an optical image stabilization driving device includes a fixing plate, a metal plate, a movable plate, an FPC, a cushion block, an elastic arm, and an SMA wire. The metal plate is fixedly attached to the top surface of the fixing plate. A movable plate is arranged parallel above the metal plate, and an FPC is attached to the surface of the movable plate. Elastic arms are provided at the four corners of the movable plate, and the bottom ends of the elastic arms are fixedly connected to the fixing plate through cushion blocks. SMA wires are provided on the sides of the movable plate, and both ends of the SMA wires are fixedly connected to the metal plate and the movable plate respectively.

[0006] Preferably, the FPC layout bypasses the bending area on the surface of the metal plate, and the FPC layout does not overlap with the bending area of the metal plate.

[0007] Preferably, there is a bending feature for limiting the FPC on the elastic arm at one corner of the movable plate.

[0008] Preferably, the elastic arm is formed by bending.

[0009] Preferably, one end of the circuit in the FPC is led out through the elastic arm to the outside of the OIS device and connected to the module.

[0010] Preferably, a through hole is provided on one side of the fixing plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The movable plate and the FPC are suspended on the surface of the fixed plate, so that the lens module is suspended and installed. Through the heat shrinkage of the SMA wire, the movement of the camera in the XY plane is realized. There is no need for a support component under the movable plate of the present invention, which avoids the influence of friction, makes the planar movement of the camera module stable and agile, and has a stable anti-shake effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0013] Figure 2 is a schematic diagram of the through-hole structure of the present invention;

[0014] Figure 3 is a schematic diagram of the movable plate structure of the present invention;

[0015] Figure 4 is a schematic diagram of the side view layout structure of the present invention.

[0016] In the figure: 1, fixed plate; 2, metal plate; 3, movable plate; 4, FPC; 5, spacer; 6, elastic arm; 7, SMA wire; 8, through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-4 , the present invention provides a technical solution: A circuit for an optical image stabilization driving device includes a fixed plate 1, a metal plate 2, a movable plate 3, an FPC 4, a spacer 5, an elastic arm 6 and an SMA wire 7. The metal plate 2 is fixedly attached to the top surface of the fixed plate 1. A movable plate 3 is arranged in parallel above the metal plate 2, and an FPC 4 is attached and installed on the surface of the movable plate 3. Elastic arms 6 are provided at the four corner positions of the movable plate 3, and the bottom ends of the elastic arms 6 are fixedly connected to the fixed plate 1 through the spacers 5. SMA wires 7 are provided on the sides of the movable plate 3, and both ends of the SMA wires 7 are fixedly connected to the metal plate 2 and the movable plate 3 respectively.

[0019] The FPC 4 arranged on the movable plate 3 is used for routing. Sensors and / or controllers can be arranged on the FPC 4. When the automatic focus module of the lens is carried on the movable plate 3, the circuit of the automatic focus module can be connected to the outside through the FPC 4.

[0020] The lens module is mounted on the surfaces of the movable plate 3 and the FPC 4. Through the fixed connection of the elastic arm 6, the movable plate 3 and the FPC 4 are suspended and fixed on the surface of the fixed plate 1, so that the lens module is suspended and installed. Combining with the characteristic of the heat shrinkage of the SMA wire 7, the movement of the camera along the X-axis and Y-axis is realized. The stiffness in the Z direction is very large, and the displacement of the camera in the Z direction can be ignored. Therefore, a support component is not required under the movable plate 3, avoiding the influence of friction, making the planar movement of the camera module stable and agile, and having a stable anti-shake effect.

[0021] The layout of the FPC 4 bypasses the bending area on the surface of the metal plate 2, and the layout of the FPC 4 does not overlap with the bending area of the metal plate 2, so as to avoid affecting the use of the metal plate 2.

[0022] There is a bending feature for limiting the FPC 4 on the elastic arm 6 at one corner of the movable plate 3. The FPC 4 fits with the bent part of the elastic arm 6, which can play a role in limiting the FPC 4 and prevent the FPC 4 from swinging.

[0023] The elastic arm 6 is formed by bending. The elastic arm 6 is bent and formed at one time, which can ensure that the fixed part and the movable part of the movable plate 3 are in the same plane and will not be affected by the bending accuracy. The four elastic arms 6 can also be bent twice respectively, so that the fixed part and the movable part of the movable plate 3 can be at different heights. Here, it is not restricted whether the fixed part and the movable part are in the same plane.

[0024] One end of the circuit in the FPC 4 is led out to the outside of the OIS device through the elastic arm 6 and connected to the module, making the connection of the FPC 4 circuit stable and avoiding affecting the movement of the movable plate 3.

[0025] A through hole 8 is provided on one side of the fixed plate 1 to facilitate the insertion of the circuit.

[0026] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit for an optical image stabilization driving device, comprising a fixing plate (1), a metal plate (2), a movable plate (3), an FPC (4), a cushion block (5), an elastic arm (6) and an SMA wire (7). Characterized in that: The metal plate (2) is fixedly attached to the top surface of the fixing plate (1). A movable plate (3) is arranged in parallel above the metal plate (2), and an FPC (4) is attached and installed on the surface of the movable plate (3). Elastic arms (6) are arranged at the four corners of the movable plate (3), and the bottom ends of the elastic arms (6) are fixedly connected to the fixing plate (1) through cushion blocks (5). SMA wires (7) are arranged on the sides of the movable plate (3), and both ends of the SMA wires (7) are fixedly connected to the metal plate (2) and the movable plate (3) respectively; there is a bending feature for limiting the FPC (4) on the elastic arm (6) at one corner of the movable plate (3). The FPC (4) is in contact with the bent part of the elastic arm (6), and the elastic arm (6) is formed by one or two bends.

2. The circuit for an optical image stabilization driving device according to claim 1, Characterized in that: The FPC (4) is arranged to bypass the bending area on the surface of the metal plate (2), and the layout of the FPC (4) does not overlap with the bending area of the metal plate (2).

3. The circuit for an optical image stabilization driving device according to claim 1, Characterized in that: One end of the circuit in the FPC (4) is led out through the elastic arm (6) to the outside of the OIS device and connected to the module.

4. The circuit for an optical image stabilization driving device according to claim 1, Characterized in that: A through hole (8) is formed on one side of the fixing plate (1).

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