Optical image stabilization module

Abstract

The present invention provides an optical image stabilization module, comprising a fixed frame, a movable frame, an elastic connecting member connecting the fixed frame and the movable frame and supporting the movement of the movable frame relative to the fixed frame, an image sensor chip fixed to the movable frame and moving along with the movable frame, and a driving assembly that drives the movable frame to move within the plane where the image sensor chip is located. The optical image stabilization module further comprises a damping assembly connected between the fixed frame and the movable frame, the damping assembly comprises a first clamping piece fixed to the fixed frame, a second clamping piece fixed to the movable frame, and a damping piece sandwiched between the first clamping piece and the second clamping piece, and the hardness of the first clamping piece and the hardness of the second clamping piece are greater than that of the damping piece. The optical image stabilization module provided by the present invention can improve the image stabilization performance.

Description

Optical image stabilization module Technical Field

[0001] This utility model relates to the field of optical camera devices, and in particular to an optical image stabilization module. Background Technology

[0002] To ensure clear imaging, optical camera devices typically incorporate optical image stabilization modules to eliminate the impact of camera shake on the image.

[0003] The optical image stabilization module of the relevant technology includes a fixed frame, a movable frame that is movable relative to the fixed frame, and an image sensor chip fixed to the movable frame and moving with the movable frame, thereby achieving image stabilization by moving the image sensor chip. To achieve better image stabilization performance, damping adhesive is usually placed between the fixed frame and the movable frame to adjust the damping of the image stabilization movement, so that the image sensor chip can perform image stabilization movement quickly and stably. Technical issues

[0004] However, due to the fluidity of the damping adhesive, the consistency after dispensing and molding is poor, which prevents it from achieving the expected damping effect and results in poor anti-shake performance.

[0005] Therefore, it is necessary to provide a new optical image stabilization module to solve the above-mentioned technical problems. Technical solutions

[0006] The purpose of this invention is to overcome the above-mentioned technical problems and provide an optical image stabilization module that can improve image stabilization performance.

[0007] To achieve the above objectives, this utility model provides an optical image stabilization module, including a fixed frame, a movable frame, an elastic connector connecting the fixed frame and the movable frame and supporting the movable frame to move relative to the fixed frame, an image sensor chip fixed to the movable frame and moving with the movable frame, and a driving component for driving the movable frame to move within the plane of the image sensor chip. The optical image stabilization module further includes a damping component connected between the fixed frame and the movable frame. The damping component includes a first clip fixed to the fixed frame, a second clip fixed to the movable frame, and a damping plate clamped between the first clip and the second clip. The hardness of the first clip and the second clip is greater than the hardness of the damping plate.

[0008] Preferably, the damping sheet is one of a silicone sheet, a rubber sheet, and a thermoplastic elastomer sheet.

[0009] Preferably, the first clip and the second clip are stainless steel sheets.

[0010] Preferably, the damping component is cylindrical in shape.

[0011] Preferably, the thickness of the damping sheet is greater than the thickness of the first clip and the second clip.

[0012] Preferably, the fixed frame has a receiving space, the fixed frame includes a bottom cover and a housing that covers the bottom cover and together with the bottom cover forms the receiving space, the movable frame and the image sensor chip are received in the receiving space, the housing includes a top wall that is spaced apart from the bottom cover and a side wall that connects the top wall and the bottom cover, the top wall has a through hole that exposes the image sensor chip, the movable frame includes a bottom plate that is spaced apart from the bottom cover and two support blocks that are disposed on one opposite side of the bottom plate, the image sensor chip is fixed to the bottom plate, the elastic connector includes a first connecting portion that is fixed to the bottom plate and surrounds the image sensor chip, two second connecting portions that extend from the first connecting portion to the two support blocks and are fixed to their respective support blocks, two third connecting portions that are fixed to the bottom cover and disposed on the other opposite side of the bottom plate, and elastic arms that connect adjacent second connecting portions and third connecting portions respectively, the elastic arms extending along the side wall.

[0013] Preferably, the damping assembly is provided between each support block and the top wall, the first clip of each damping assembly is fixed in the corresponding receiving hole formed in the top wall, and the second clip of each damping assembly is fixed in the receiving groove formed in the corresponding support block.

[0014] Preferably, the optical image stabilization module further includes a chip circuit board, which is fixed to the base plate and surrounds the image sensor chip. The driving assembly includes four sets of electromagnetic components, which are disposed at the four corners of the side wall. Each set of electromagnetic components includes a first magnet fixed to the top wall, a second magnet fixed to the bottom cover and spaced apart from the first magnet, and a coil assembly disposed between the first magnet and the second magnet. The first magnet includes a first part and a second part arranged perpendicularly to each other, and the second magnet includes a third part and a fourth part arranged perpendicularly to each other. The first part and the third part are spaced apart from each other, and the second part and the fourth part are spaced apart from each other. The coil assembly includes a coil circuit board fixed to the chip circuit board and a first coil and a second coil formed on the coil circuit board and arranged perpendicularly to each other. The first coil is disposed between the first part and the third part, and the second coil is disposed between the second part and the fourth part. Beneficial effects

[0015] In the optical image stabilization module of this invention, the damping component is connected between the fixed frame and the movable frame. The damping component includes a first clip fixed to the fixed frame, a second clip fixed to the movable frame, and a damping plate sandwiched between the first clip and the second clip. The stiffness of the first clip and the second clip is greater than the stiffness of the damping plate. The damping component has a stable and reliable design structure with good consistency, enabling it to better exert its damping effect and improve image stabilization performance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a three-dimensional structural schematic diagram of the optical image stabilization module provided by this utility model;

[0018] Figure 2 is a three-dimensional exploded view of the optical image stabilization module shown in Figure 1;

[0019] Figure 3 is a cross-sectional structural diagram of the optical image stabilization module shown in Figure 1;

[0020] Figure 4 is a partial cross-sectional view of the optical image stabilization module shown in Figure 1. The best embodiment of the present invention

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0022] Please refer to Figures 1-4. This utility model provides an optical image stabilization module 100, which includes a fixed frame 10, a movable frame 20, an elastic connector 30 connecting the fixed frame 10 and the movable frame 20 and supporting the movable frame 20 to move relative to the fixed frame 10, an image sensor chip 40 fixed to the movable frame 20 and moving with the movable frame 20, a driving component 50 driving the movable frame 20 to move in the plane where the image sensor chip 40 is located, and a damping component 60 connected between the fixed frame 10 and the movable frame 20.

[0023] The damping assembly 60 includes a first clamping piece 61 fixed to the fixed frame 10, a second clamping piece 62 fixed to the movable frame 20, and a damping piece 63 clamped between the first clamping piece 61 and the second clamping piece 62, wherein the hardness of the first clamping piece 61 and the second clamping piece 62 is greater than the hardness of the damping piece 63.

[0024] Alternatively, the damping sheet 63 may be one of a silicone sheet, a rubber sheet, or a thermoplastic elastomer sheet. The first clip 61 and the second clip 62 may be stainless steel sheets.

[0025] In this embodiment, the damping component 60 is cylindrical. Of course, in other embodiments, the damping component 60 can be selected with other three-dimensional shapes according to actual design needs.

[0026] The thickness of the damping plate 63 is greater than the thickness of the first clip 61 and the second clip 62.

[0027] In this embodiment, the fixed frame 10 has a receiving space 101. The fixed frame 10 includes a bottom cover 12 and a housing 11 that covers the bottom cover 12 and together with the bottom cover 12 forms the receiving space 101. The movable frame 20 and the image sensor chip 40 are received in the receiving space 101.

[0028] The housing 11 includes a top wall 111 spaced apart from the bottom cover 12 and a side wall 112 connecting the top wall 111 and the bottom cover 12. The top wall 111 is provided with a through hole 1111 that exposes the image sensor chip 40.

[0029] The movable frame 20 includes a base plate 21 that is spaced apart from the bottom cover 12 and two support blocks 22 that are disposed on opposite sides of the base plate 21. The image sensor chip 40 is fixed to the base plate 21.

[0030] The elastic connector 30 includes a first connecting portion 31 fixed to the base plate 21 and surrounding the image sensor chip 40, two second connecting portions 32 extending from the first connecting portion 31 toward the two support blocks 22 and fixed to their respective support blocks 22, two third connecting portions 33 fixed to the bottom cover 12 and disposed on the other opposite sides of the base plate 21, and an elastic arm 34 connecting the adjacent second connecting portions 32 and the third connecting portions 33, wherein the elastic arm 34 extends along the side wall 112.

[0031] Each support block 22 is provided with a damping component 60 between it and the top wall 111. The first clip 61 of each damping component 60 is fixed in the corresponding receiving hole 1112 formed in the top wall 111, and the second clip 62 of each damping component 60 is fixed in the receiving groove 221 formed in the corresponding support block 22.

[0032] The optical image stabilization module 100 also includes a chip circuit board 70, which is fixed to the base plate 21 and arranged around the image sensor chip 40.

[0033] The drive assembly 50 includes four sets of electromagnetic assemblies 501, which are respectively disposed at the four corners of the side wall 112. Each set of electromagnetic assemblies 501 includes a first magnet 51 fixed to the top wall 111, a second magnet 52 fixed to the bottom cover 12 and spaced apart from the first magnet 51, and a coil assembly 53 disposed between the first magnet 51 and the second magnet 52.

[0034] The first magnet 51 includes a first part 511 and a second part 512 arranged perpendicularly to each other, and the second magnet 52 includes a third part 521 and a fourth part 522 arranged perpendicularly to each other. The first part 511 and the third part 521 are arranged at intervals relative to each other, and the second part 512 and the fourth part 522 are arranged at intervals relative to each other.

[0035] The coil assembly 53 includes a coil circuit board 531 fixed to the chip circuit board 70 and a first coil 532 and a second coil 533 formed on the coil circuit board 531 and arranged perpendicularly to each other. The first coil 532 is disposed between the first part 511 and the third part 521, and the second coil 533 is disposed between the second part 512 and the fourth part 522.

[0036] In the optical image stabilization module of this invention, the damping component is connected between the fixed frame and the movable frame. The damping component includes a first clip fixed to the fixed frame, a second clip fixed to the movable frame, and a damping plate sandwiched between the first clip and the second clip. The stiffness of the first clip and the second clip is greater than the stiffness of the damping plate. The damping component has a stable and reliable design structure with good consistency, enabling it to better exert its damping effect and improve image stabilization performance.

[0037] It should be noted that the term "fixed to" as used above includes both direct fixing and indirect fixing by setting an intermediate medium.

[0038] The above description is merely an embodiment of this utility model. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this utility model, but these improvements all fall within the protection scope of this utility model.

Claims

1. An optical image stabilization module, comprising a fixed frame, a movable frame, an elastic connector connecting the fixed frame and the movable frame and supporting the movable frame to move relative to the fixed frame, an image sensor chip fixed to the movable frame and moving with the movable frame, and a driving component for driving the movable frame to move within the plane of the image sensor chip, characterized in that, The optical image stabilization module further includes a damping component connected between the fixed frame and the movable frame. The damping component includes a first clip fixed to the fixed frame, a second clip fixed to the movable frame, and a damping plate clamped between the first clip and the second clip. The hardness of the first clip and the second clip is greater than the hardness of the damping plate.

2. The optical image stabilization module according to claim 1, characterized in that, The damping sheet is one of silicone sheet, rubber sheet, and thermoplastic elastomer sheet.

3. The optical image stabilization module according to claim 1, characterized in that, The first clip and the second clip are stainless steel sheets.

4. The optical image stabilization module according to claim 1, characterized in that, The damping component is cylindrical in shape.

5. The optical image stabilization module according to claim 1, characterized in that, The thickness of the damping plate is greater than the thickness of the first clip and the second clip.

6. The optical image stabilization module according to claim 1, characterized in that, The fixed frame has a receiving space, the fixed frame includes a bottom cover and a housing that covers the bottom cover and together with the bottom cover forms the receiving space, the movable frame and the image sensor chip are received in the receiving space, the housing includes a top wall that is spaced apart from the bottom cover and a side wall that connects the top wall and the bottom cover, the top wall has a through hole that exposes the image sensor chip, the movable frame includes a bottom plate that is spaced apart from the bottom cover and two support blocks that are disposed on one opposite side of the bottom plate, the image sensor chip is fixed to the bottom plate, the elastic connector includes a first connecting part that is fixed to the bottom plate and surrounds the image sensor chip, two second connecting parts that extend from the first connecting part to the two support blocks and are fixed to their respective support blocks, two third connecting parts that are fixed to the bottom cover and disposed on the other opposite side of the bottom plate, and elastic arms that connect adjacent second connecting parts and third connecting parts respectively, the elastic arms extending along the side wall.

7. The optical image stabilization module according to claim 6, characterized in that, The damping assembly is provided between each support block and the top wall. The first clip of each damping assembly is fixed in the corresponding receiving hole formed in the top wall, and the second clip of each damping assembly is fixed in the receiving groove formed in the corresponding support block.

8. The optical image stabilization module according to claim 6, characterized in that, The optical image stabilization module also includes a chip circuit board, which is fixed to the base plate and surrounds the image sensor chip. The driving assembly includes four sets of electromagnetic components, which are respectively disposed at the four corners of the side wall. Each set of electromagnetic components includes a first magnet fixed to the top wall, a second magnet fixed to the bottom cover and spaced apart from the first magnet, and a coil assembly disposed between the first magnet and the second magnet. The first magnet includes a first part and a second part arranged perpendicularly to each other, and the second magnet includes a third part and a fourth part arranged perpendicularly to each other. The first part and the third part are spaced apart from each other, and the second part and the fourth part are spaced apart from each other. The coil assembly includes a coil circuit board fixed to the chip circuit board and a first coil and a second coil formed on the coil circuit board and arranged perpendicularly to each other. The first coil is disposed between the first part and the third part, and the second coil is disposed between the second part and the fourth part.

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