A driving device for a lens module and a lens module

Abstract

The present invention relates to the field of imaging technologies, and particularly to a driving device for a lens module and a lens module. The driving device includes a first actuator unit, a lower moving plate, a second actuator unit, and an upper moving plate that are sequentially stacked from bottom to top. The upper moving plate includes an image sensor mounting area; the first actuator unit includes a first moving area, the lower moving plate is disposed within the first moving area, the first actuator unit includes a first shape memory alloy wire group, and the first shape memory alloy wire group contracts after being energized to drive the lower moving plate to move in the X direction perpendicular to the first shape memory alloy wire group; the second actuator unit includes a second moving area, the upper moving plate is disposed within the second moving area, the second actuator unit includes a second shape memory alloy wire group, and the second shape memory alloy wire group contracts after being energized to drive the upper moving plate to move in the Y direction perpendicular to the second shape memory alloy wire group. This application solves the problem of image optical anti-shake.

Description

Technical Field

[0001] The present invention relates to the field of imaging technology, and in particular, to a driving device for a lens module and a lens module. Background Art

[0002] With the rapid development of multimedia technology, digital cameras, video cameras, tablet computers, and mobile phones with cameras are increasingly favored by consumers. In photographic devices such as digital cameras, video cameras, and mobile phone cameras, the lens module is an indispensable component. The camera module generally includes a lens barrel, a lens holder, a lens, and an image sensor. The lens is housed in the lens barrel, and the image sensor is disposed on the lens holder. A motor drives the image sensor to move for anti-shake.

[0003] The image sensor usually comes with a relatively rigid FPC (Flexible Printed Circuit) circuit board. The thrust of the traditional electromagnetic VCM motor is limited and it is difficult to push the image sensor. Summary of the Invention

[0004] The purpose of the present invention is to provide a driving device for a lens module and a lens module to solve the problem of optical image stabilization of the terminal device.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A driving device for a lens module includes a first execution unit, a lower moving plate, a second execution unit, and an upper moving plate which are sequentially stacked from bottom to top. The upper moving plate includes an image sensor mounting area;

[0007] The first execution unit includes a first moving area. The lower moving plate is disposed in the first moving area. The first execution unit includes a first shape memory alloy wire group. The first shape memory alloy wire group contracts after being energized to drive the lower moving plate to move in the X direction perpendicular to the first shape memory alloy wire group;

[0008] The second execution unit includes a second moving area. The upper moving plate is disposed in the second moving area. The second execution unit includes a second shape memory alloy wire group. The second shape memory alloy wire group contracts after being energized to drive the upper moving plate to move in the Y direction perpendicular to the second shape memory alloy wire group.

[0009] Preferably, the first execution unit further includes a first fixing component, a first connecting component, a first connecting rod, and a plurality of first support rods;

[0010] The first connection component includes a plurality of first connection parts. The four corners of the first execution unit are each provided with the first connection part. The first fixing component and the first connection parts on both sides are connected by the first connecting rod. The first support rod is connected to the first connection part. A triangular-like structure is formed between the first support rod and the first connecting rod;

[0011] The first execution unit includes a first driving area surrounding the first moving area. The first moving area includes a plurality of the first support rods, and the lower moving plate is arranged on the first support rods;

[0012] In the first driving area, the first shape memory alloy wire group includes a first shape memory alloy wire and a second shape memory alloy wire arranged oppositely. Both ends of the first shape memory alloy wire and the second shape memory alloy wire are connected to the first connection part.

[0013] Preferably, the first execution unit further includes a first supporting plate. The first supporting plate is arranged in the first moving area and is connected to the first support rod.

[0014] Preferably, the first fixing component includes a first common end, a first energized fixing end, and a second energized fixing end. The first energized fixing end is used for energizing the first shape memory alloy wire, and the second energized fixing end is used for energizing the second shape memory alloy wire.

[0015] Preferably, the second execution unit further includes a second fixing component, a second connection component, a second connecting rod, and a plurality of second support rods. The second fixing component is fixed on the lower moving plate;

[0016] The second connection component includes a plurality of second connection parts. The four corners of the second execution unit are each provided with the second connection part. The second fixing component and the second connection parts on both sides are connected by the second connecting rod. The second support rod is connected to the second connection part. A triangular-like structure is formed between the second support rod and the second connecting rod;

[0017] The second execution unit includes a second driving area surrounding the second moving area. The second moving area includes a plurality of the second support rods, and the lower moving plate is arranged on the second support rods;

[0018] In the second driving area, the second shape memory alloy wire group includes a third shape memory alloy wire and a fourth shape memory alloy wire arranged oppositely. Both ends of the third shape memory alloy wire and the fourth shape memory alloy wire are connected to the second connection part.

[0019] Preferably, the second execution unit further includes a second supporting plate, which is disposed within the second moving area and is connected to the second support rod.

[0020] Preferably, the second fixing assembly includes a second common end, a third energized fixing end, and a fourth energized fixing end. The third energized fixing end is used to energize the third shape memory alloy wire, and the fourth energized fixing end is used to energize the fourth shape memory alloy wire.

[0021] Preferably, it further includes a housing and a fixing base plate. The first execution unit is disposed on the fixing base plate, the first fixing assembly is fixed on the fixing base plate, and the peripheries of the first execution unit and the second execution unit are clamped within the housing.

[0022] Preferably, a plurality of sliding bearings or balls are disposed between the gaps of the upper moving plate and the lower moving plate.

[0023] A lens module includes an image sensor unit, a base housing, a lens, and the driving device as described above.

[0024] The base housing is provided with a mounting hole, the lens is disposed within the mounting hole, and the image sensor unit is disposed on the upper moving plate.

[0025] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0026] The thrust formed by the shape memory alloy wire is usually 5 to 20 times the thrust of a traditional electromagnetic VCM motor, which can meet the thrust requirements. The first shape memory alloy wire group contracts after being energized to drive the lower moving plate to move in the X direction, and the moving direction is perpendicular to the first shape memory alloy wire group. The second execution unit is disposed on the lower moving plate, and the image sensor unit disposed on the upper moving plate also moves in the X direction along with the second execution unit and the upper moving plate.

[0027] The second execution unit includes a second shape memory alloy wire group. The second shape memory alloy wire group contracts after being energized to drive the upper moving plate to move in the Y direction, and the moving direction is perpendicular to the second shape memory alloy wire group. The image sensor unit on the upper moving plate also moves in the Y direction along with the upper moving plate. The image sensor unit realizes independent movement in the X direction and the Y direction.

[0028] The driving device of the present application enables the image sensor unit to achieve horizontal translation through the first execution unit, the lower moving plate, the second execution unit, and the upper moving plate arranged in a stacked manner, thereby solving the problem of image optical anti-shake of the terminal device. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 Explosion structure schematic diagram of the driving device provided by the embodiment of the present invention;

[0031] Figure 2 Explosion structure schematic diagram of the lens module provided by the embodiment of the present invention;

[0032] Figure 3 Overall structure schematic diagram of the lens module provided by the embodiment of the present invention.

[0033] Illustration: First execution unit 1, lower moving plate 3, second execution unit 2, upper moving plate 4, fixed bottom plate 5, housing 6, image sensor unit 7, base housing 8, lens 9;

[0034] First shape memory alloy wire 111, second shape memory alloy wire 112, first common end 121, first energized fixed end 122, second energized fixed end 123, first connecting portion 13, first support rod 14, first connecting rod 15, first supporting plate 16;

[0035] Third shape memory alloy wire 211, fourth shape memory alloy wire 212, second common end 221, third energized fixed end 222, fourth energized fixed end 223, second connecting portion 23, second support rod 24, second connecting rod 25, second supporting plate 26. Detailed implementation manners

[0036] To make the objectives, features, and advantages of the present invention more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be intermediate components.

[0038] In addition, terms such as "long", "short", "inner", "outer", etc. indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or component referred to must have this specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0039] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0040] Embodiment 1

[0041] Please refer to Figure 1 , a driving device for a lens module, the driving device includes a first execution unit 1, a second execution unit 2, a lower moving plate 3 and an upper moving plate 4. The first execution unit 1, the lower moving plate 3, the second execution unit 2 and the upper moving plate 4 are stacked in sequence from bottom to top. The upper moving plate 4 includes an image sensor mounting area;

[0042] The first execution unit 1 includes a first moving area, the lower moving plate 3 is arranged in the first moving area. The first execution unit 1 includes a first shape memory alloy wire group, and the first shape memory alloy wire group contracts after being energized to drive the lower moving plate 3 to move in the X direction perpendicular to the first shape memory alloy wire group;

[0043] The second execution unit 2 includes a second moving area, the upper moving plate 4 is arranged in the second moving area. The second execution unit 2 includes a second shape memory alloy wire group, and the second shape memory alloy wire group contracts after being energized to drive the upper moving plate 4 to move in the Y direction perpendicular to the second shape memory alloy wire group.

[0044] First, the thrust generated by the shape memory alloy wire is usually 5 to 20 times that of the traditional electromagnetic VCM motor, which can meet the thrust requirements. The first shape memory alloy wire group contracts after being energized to drive the lower moving plate 3 to move in the X direction. The moving direction is perpendicular to the first shape memory alloy wire group. The second execution unit 2 is arranged on the lower moving plate 3, and the second execution unit 2 moves in the X direction together with the lower moving plate 3. The upper moving plate 4 is arranged on the second execution unit 2, and the upper moving plate 4 includes an image sensor mounting area. Thus, the image sensor unit arranged on the upper moving plate 4 also moves in the X direction together with the second execution unit 2 and the upper moving plate 4.

[0045] The second execution unit 2 includes a second shape memory alloy wire group, and the second shape memory alloy wire group contracts after being energized to drive the upper moving plate 4 to move in the Y direction. The moving direction is perpendicular to the second shape memory alloy wire group. The image sensor unit on the upper moving plate 4 also moves in the Y direction together with the upper moving plate 4.

[0046] The driving device of this embodiment enables the image sensor unit to achieve horizontal translation through the first execution unit 1, the lower moving plate 3, the second execution unit 2, and the upper moving plate 4 arranged in a stacked manner, thereby solving the problem of image optical anti-shake of the terminal device.

[0047] Currently, larger terminals such as digital cameras improve the pixel quality by adopting the principle of pixel stacking, and the displacement amount of pixels during movement needs to be sub-micron level for pixel stacking. However, for some small terminals, especially mobile phones, due to the small internal space, the VCM motors installed inside can only push the pixels to move at the micron level, and the displacement amount generated by the contraction of the current shape memory alloy wire is also above the micron level, making it impossible to achieve pixel stacking.

[0048] In order to further improve the pixel quality, in an alternative embodiment, the first execution unit 1 further includes a first fixing component, a first connecting component, a first connecting rod 15, and a plurality of first support rods 14;

[0049] The first connecting component includes a plurality of first connecting parts 13. The four corners of the first execution unit 1 are each provided with a first connecting part 13. The first fixing component is connected to the first connecting parts 13 on both sides through the first connecting rod 15, and the first support rods 14 are connected to the first connecting parts 13;

[0050] The first execution unit 1 includes a first driving area surrounding the first moving area. The first moving area includes a plurality of first support rods 14, and the lower moving plate 3 is arranged on the first support rods 14;

[0051] Within the first driving area, the first shape memory alloy wire group includes a first shape memory alloy wire 111 and a second shape memory alloy wire 112 arranged opposite to each other. Both ends of the first shape memory alloy wire 111 and the second shape memory alloy wire 112 are connected to the first connecting part 13. In this embodiment, the first shape memory alloy wire 111 and the second shape memory alloy wire 112 are arranged on opposite sides of the first execution unit 1, and the first fixing component is arranged on the other two sides.

[0052] Specifically, the first fixing component is fixed. The four corners of the first execution unit 1 are each provided with a first connecting part 13. Both ends of the first shape memory alloy wire 111 and the second shape memory alloy wire 112 are connected to the first connecting part 13. The first shape memory alloy wire 111 and the second shape memory alloy wire 112 are arranged opposite to each other. The first support rods 14 are connected to the first connecting parts 13. A triangular-like structure is formed between the first support rods 14 and the first connecting rod 15, and two triangular-like structures are formed in the first execution unit 1.

[0053] Specifically, the first fixing component is immovable. The four corners of the first execution unit 1 are each provided with a first connecting part 13. Both ends of the first shape memory alloy wire 111 and the second shape memory alloy wire 112 are connected to the first connecting part 13. The first shape memory alloy wire 111 and the second shape memory alloy wire 112 are arranged opposite to each other. The first support rods 14 are connected to the first connecting parts 13. A triangular-like structure is formed between the first support rods 14 and the first connecting rod 15, and two triangular-like structures are formed in the first execution unit 1.

[0054] When the first shape memory alloy wire 111 is energized and contracts to generate a driving force, the driving force pushes the first connecting portion 13 and the first support rod 14 to move towards the second shape memory alloy wire 112. For the convenience of description, it is defined as moving to the left here. The lower moving plate 3 is arranged on the first support rod 14, and the lower moving plate 3 also moves to the left. Thus, the image sensor unit arranged on the upper moving plate 4 also moves to the left. Similarly, when the second shape memory alloy wire 112 is energized and contracts to generate a driving force, the image sensor unit arranged on the upper moving plate 4 also moves to the right. When it is necessary to drive the upper moving plate 4 to move to the left, the first shape memory alloy wire 111 is energized with an increased current, and the second shape memory alloy wire 112 is energized with a decreased current.

[0055] Due to the above triangular-like structure, the displacement generated by the contraction of the first shape memory alloy wire 111 is greater than the displacement decomposed onto the first support rod 14. The first fixing assembly is connected to the first connecting portions 13 on both sides through the first connecting rod 15. Since the first connecting assembly is fixed, during the driving process of the first shape memory alloy wire 111, the first connecting rod 15 also generates a component force. There are component forces and driving forces on both sides of the first support rod 14. Therefore, the resultant force on the first support rod 14 is greater than the driving force generated by the contraction of the first shape memory alloy wire 111. Therefore, the first execution unit 1 enables the image sensor unit to have a larger resultant force while reducing the displacement amount. If a 10-fold reduction ratio is adopted in this embodiment and the displacement amount of the contraction of the first shape memory alloy wire group is 5 microns, then the displacement amount of each pixel point of the image sensor unit is 0.5 microns, achieving a sub-micron-level movement amount. The structural design of the first execution unit 1 can be used to solve the accuracy problem of image optical anti-shake and can also be used for image pixel translation to synthesize high-precision images, realizing the function of improving image resolution.

[0056] To enable the pixel points of the image sensor unit to also achieve a sub-micron-level movement amount in the Y direction, further, the second execution unit 2 further includes a second fixing assembly, a second connecting assembly, a second connecting rod 25, and a plurality of second support rods 24. The second fixing assembly is fixed on the lower moving plate 3;

[0057] The second connecting assembly includes a plurality of second connecting portions 23. The second connecting portions 23 are arranged at the four corners of the second execution unit 2. The second fixing assembly is connected to the second connecting portions 23 on both sides through the second connecting rod 25. The second support rod 24 is connected to the second connecting portion 23. A triangular-like structure is formed between the second support rod 24 and the second connecting rod 25;

[0058] The second execution unit 2 includes a second driving area surrounding the second moving area. The second moving area includes a plurality of second support rods 24. The lower moving plate 3 is arranged on the second support rods 24;

[0059] In the second driving area, the second shape memory alloy wire group includes a third shape memory alloy wire 211 and a fourth shape memory alloy wire 212 which are oppositely arranged. Both ends of the third shape memory alloy wire 211 and the fourth shape memory alloy wire 212 are connected to the second connecting part 23.

[0060] Further, the first execution unit 1 further includes a first supporting plate 16. The first supporting plate 16 is arranged in the first moving area and is connected to the first supporting rod 14. The second execution unit 2 further includes a second supporting plate 26. The second supporting plate 26 is arranged in the second moving area and is connected to the second supporting rod 24. The first supporting plate 16 is used for placing the lower moving plate 3. The second supporting plate 26 is used for placing the upper moving plate 4. Optionally, the first supporting plate 16 is arranged on the first supporting rod 14, and the second supporting plate 26 is arranged on the second supporting rod 24.

[0061] In this application, the first fixing component includes a first common end 121, a first energized fixing end 122, and a second energized fixing end 123. The first energized fixing end 122 energizes the first shape memory alloy wire 111, and the second energized fixing end 123 energizes the second shape memory alloy wire 112. Power is supplied from both sides to avoid short - circuit of the first execution unit 1.

[0062] The second fixing component includes a second common end 221, a third energized fixing end 222, and a fourth energized fixing end 223. The third energized fixing end 222 energizes the third shape memory alloy wire 211, and the fourth energized fixing end 223 energizes the fourth shape memory alloy wire 212.

[0063] Further, the driving device further includes a housing 6 and a fixed bottom plate 5. The first execution unit 1 is arranged on the fixed bottom plate 5, and the first fixing component is fixed on the fixed bottom plate 5. The peripheries of the first execution unit 1 and the second execution unit 2 are clamped inside the housing 6, and the housing 6 protects the first execution unit 1 and the second execution unit 2 from being scratched.

[0064] The housing 6 is provided with a through - hole, and the upper moving plate 4 is arranged in the through - hole. The fixed bottom plate 5 is fixedly arranged at the bottom of the housing 6. The fixed bottom plate 5 and the housing 6 form an accommodation space, and the first execution unit 1, the lower moving plate 3, the second execution unit 2, and the upper moving plate 4 are all accommodated in the accommodation space.

[0065] During the operation of the second execution unit 2, the upper moving plate 4 slides relative to the lower moving plate 3. In an optional embodiment, a plurality of sliding bearings or balls are arranged between the gaps of the upper moving plate 4 and the lower moving plate 3, which is beneficial to the movement of the upper moving plate 4, ensures that the gap between the two panels of the upper moving plate 4 and the lower moving plate 3 remains unchanged, and is beneficial to keeping the displacement generated by the upper moving plate 4 in the Z - direction very small.

[0066] The first execution unit 1 and the second execution unit 2 are actuators for reducing displacement, and can achieve independent movement in the X direction and the Y direction simultaneously, which is especially suitable for mobile phones. Since the internal space of mobile phones is small, high-quality pixels can be achieved by using this driving device.

[0067] Embodiment 2

[0068] Please refer to Figures 2 - 3 , a lens module, which includes an image sensor unit 7, a base housing 8, a lens 9, and the driving device in Embodiment 1;

[0069] The base housing 8 is provided with a mounting hole, the lens 9 is arranged in the mounting hole, and the image sensor unit 7 is attached to the upper moving plate 4.

[0070] The driving device includes a first execution unit 1, a lower moving plate 3, a second execution unit 2, and an upper moving plate 4 which are stacked in sequence from bottom to top. The upper moving plate 4 includes an image sensor mounting area, and the image sensor unit 7 is arranged in the image sensor mounting area;

[0071] The first execution unit 1 includes a first moving area, the lower moving plate 3 is arranged in the first moving area. The first execution unit 1 includes a first shape memory alloy wire group, and the first shape memory alloy wire group shrinks after being powered on to drive the lower moving plate 3 to move in the X direction perpendicular to the first shape memory alloy wire group;

[0072] The second execution unit 2 includes a second moving area, the upper moving plate 4 is arranged in the second moving area. The second execution unit 2 includes a second shape memory alloy wire group, and the second shape memory alloy wire group shrinks after being powered on to drive the upper moving plate 4 to move in the Y direction perpendicular to the second shape memory alloy wire group.

[0073] According to the shaking condition of the lens module, the driving device drives the image sensor unit 7 to move in the horizontal direction to solve the problem of optical image stabilization of the image, thereby making the image presented by the image sensor unit 7 clearer.

[0074] In addition, a first type of triangular structure is formed between the first support rod 14 and the first connecting rod 15, and the first shape memory alloy wire 111 and the second shape memory alloy wire 112 are oppositely arranged on both sides of the first type of triangular structure. A second type of triangular structure is formed between the second support rod 24 and the second connecting rod 25, and the third shape memory alloy wire 211 and the fourth shape memory alloy wire 212 are oppositely arranged on both sides of the second type of triangular structure. The first execution unit 1 and the second execution unit 2 form a relatively large thrust to push the image sensor unit 7, and enable the image sensor unit 7 to have a relatively small displacement amount. The displacement amount of the pixel points in the image sensor unit 7 achieves the sub-micron level. By pixel superposition, the pixel quality of the image is improved. The lens module of the present application can not only improve the accuracy of image optical anti-shake, but also be used for image pixel translation to synthesize high-precision images and improve the function of image resolution.

[0075] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A driving device for a lens module, characterized in that, It includes a first execution unit (1), a lower moving plate (3), a second execution unit (2), and an upper moving plate (4) that are stacked in sequence from bottom to top. The upper moving plate (4) includes an image sensor mounting area; The first execution unit (1) includes a first moving area. The lower moving plate (3) is disposed within the first moving area. The first execution unit (1) includes a first shape memory alloy wire group. After being powered on, the first shape memory alloy wire group contracts to drive the lower moving plate (3) to move in the X direction perpendicular to the first shape memory alloy wire group; The second execution unit (2) includes a second moving area. The upper moving plate (4) is disposed within the second moving area. The second execution unit (2) includes a second shape memory alloy wire group. After being powered on, the second shape memory alloy wire group contracts to drive the upper moving plate (4) to move in the Y direction perpendicular to the second shape memory alloy wire group; A plurality of sliding bearings or balls are provided in the gap between the upper moving plate (4) and the lower moving plate (3); The first execution unit (1) further includes a first fixing component, a first connecting component, a first connecting rod (15), and a plurality of first support rods (14); The first connecting component includes a plurality of first connecting parts (13). The first connecting parts (13) are provided at the four corners of the first execution unit (1). The first fixing component is connected to the first connecting parts (13) on both sides through the first connecting rod (15). The first support rod (14) is connected to the first connecting part (13). A triangular-like structure is formed between the first support rod (14) and the first connecting rod (15); The first execution unit (1) includes a first driving area surrounding the first moving area. A plurality of the first support rods (14) are included in the first moving area. The lower moving plate (3) is disposed on the first support rods (14); Within the first driving area, the first shape memory alloy wire group includes a first shape memory alloy wire (111) and a second shape memory alloy wire (112) that are oppositely disposed. Both ends of the first shape memory alloy wire (111) and the second shape memory alloy wire (112) are connected to the first connecting part (13).

2. The driving device for a lens module according to claim 1, characterized in that, The first execution unit (1) further includes a first supporting plate (16). The first supporting plate (16) is disposed within the first moving area. The first supporting plate (16) is connected to the first support rods (14).

3. The driving device for a lens module according to claim 1, wherein The first fixing component includes a first common end (121), a first power-on fixing end (122), and a second power-on fixing end (123). The first power-on fixing end (122) is used for powering on the first shape memory alloy wire (111), and the second power-on fixing end (123) is used for powering on the second shape memory alloy wire (112).

4. The driving device for a lens module according to claim 1, wherein, The second execution unit (2) further includes a second fixing component, a second connecting component, a second connecting rod (25), and a plurality of second supporting rods (24). The second fixing component is fixed on the lower moving plate (3). The second connecting component includes a plurality of second connecting parts (23). The second connecting parts (23) are provided at the four corners of the second execution unit (2). The second fixing component is connected to the second connecting parts (23) on both sides through the second connecting rod (25). The second supporting rod (24) is connected to the second connecting part (23). A triangular-like structure is formed between the second supporting rod (24) and the second connecting rod (25). The second execution unit (2) includes a second driving area surrounding the second moving area. A plurality of the second supporting rods (24) are included in the second moving area. The lower moving plate (3) is arranged on the second supporting rods (24). In the second driving area, the second shape memory alloy wire group includes a third shape memory alloy wire (211) and a fourth shape memory alloy wire (212) arranged oppositely. Both ends of the third shape memory alloy wire (211) and the fourth shape memory alloy wire (212) are connected to the second connecting part (23).

5. The driving device for a lens module according to claim 4, wherein, The second execution unit (2) further includes a second supporting plate (26). The second supporting plate (26) is arranged in the second moving area. The second supporting plate (26) is connected to the second supporting rod (24).

6. The driving device for a lens module according to claim 4, wherein The second fixing component includes a second common end (221), a third energized fixing end (222), and a fourth energized fixing end (223). The third energized fixing end (222) is used for energizing the third shape memory alloy wire (211). The fourth energized fixing end (223) is used for energizing the fourth shape memory alloy wire (212).

7. The driving device for a lens module according to claim 1, wherein It further includes a housing (6) and a fixed bottom plate (5). The first execution unit (1) is arranged on the fixed bottom plate (5). The first fixing component is fixed on the fixed bottom plate (5). The peripheries of the first execution unit (1) and the second execution unit (2) are clamped in the housing (6).

8. A lens module, characterized in that, It includes an image sensor unit (7), a base housing (8), a lens (9), and a driving device as described in any one of claims 1-7. The base housing (8) is provided with a mounting hole. The lens (9) is arranged in the mounting hole. The image sensor unit (7) is arranged on the upper moving plate (4).

Images