Lens module

Abstract

The present invention discloses a lens module. The lens module according to an embodiment of the present invention includes a lens assembly, an image sensor, a movable part, and a driving assembly. The image sensor is located at the bottom of the lens assembly, and the image sensor is configured to receive an image signal transmitted by the lens assembly. The movable part is connected to the image sensor, and the movable part is configured to drive the image sensor to move so as to adjust a distance between the image sensor and the lens assembly. The driving assembly includes a connecting rod, an elastic part, a fixing part, and a shape memory alloy wire. One end of the connecting rod is connected to the shape memory alloy wire, and the other end is configured to drive the movable part to move. The elastic part can be elastically bent. One end of the elastic part is connected to the connecting rod, and the other end is connected to the fixing part. The shape memory alloy wire can be energized to contract to drive the connecting rod to drive the movable part to move.

Description

Technical Field

[0001] The present invention relates to the field of imaging technologies, and particularly to a lens module. Background Art

[0002] With the rapid development of multimedia technologies, 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, a lens module is an essential component. A camera module generally includes a lens barrel, a lens holder, a lens, and an image sensor. The lens is received in the lens barrel, and the image sensor is disposed on the lens holder.

[0003] In existing focus lens modules, a driving motor or a voice coil motor is used to drive the lens barrel or the lens holder to displace, thereby changing the distance between the lens barrel and the lens holder of the lens module to achieve focusing or anti-shake. However, such a lens module not only has a high cost, but also, due to the presence of the driving motor or the voice coil motor, the entire lens module is large in volume and complex in structure, and cannot meet the requirements of people for the camera module to be thin, light, short, and small. Therefore, it is necessary to provide a lens module with low cost, simple structure, and small occupied space. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a lens module, which has a low cost, a simple structure, and a small occupied space, and is beneficial to reducing the volume of the imaging device.

[0005] The lens module according to an embodiment of the present invention includes a lens assembly, an image sensor, a movable part, and a driving component. The image sensor is located at the bottom of the lens assembly, and the image sensor is configured to receive an image signal transmitted by the lens assembly. The movable part is connected to the image sensor, and the movable part is configured to drive the image sensor to move to adjust the distance between the image sensor and the lens assembly. The driving component includes a connecting rod, an elastic part, a fixing part, and a shape memory alloy wire. One end of the connecting rod is connected to the shape memory alloy wire, and the other end is configured to drive the movable part to move. The elastic part can be elastically bent. One end of the elastic part is connected to the connecting rod, and the other end is connected to the fixing part. The shape memory alloy wire can be electrically contracted to drive the connecting rod to drive the movable part to move.

[0006] According to the lens module of the embodiment of the present invention, by setting like this, at least the following beneficial effects can be achieved: The image sensor is located below the lens assembly, the movable part is connected to the image sensor, and the movable part is driven to move by the driving component, thereby driving the image sensor to move, so as to adjust the positional relationship between the image sensor and the lens assembly, so as to achieve the function of focusing or anti-shake. By adjusting the image sensor instead of the lens assembly for focusing or anti-shake, because the image sensor is small in volume and light in weight, the driving force required for the lens module is smaller and the driving is more convenient. At the same time, the image sensor is small in volume, so that the space reserved for the image sensor by the lens module is also small, thereby saving the thickness of the lens module in the axial direction. At the same time, the driving component includes a connecting rod, an elastic part, a fixing part and a shape memory alloy wire. The shape memory alloy wire drives the elastic part to bend and deform through its telescopic deformation movement, so that the connecting rod drives the movable part to move. Finally, the displacement of the movable part driven is greater than the telescopic amount of the shape memory alloy wire, so that a large driving amount can be realized under the condition of a small volume of the driving component, which is beneficial to the miniaturization of the volume of the driving component.

[0007] According to some embodiments of the present invention, the driving component further includes an elastic member, the elastic member includes a bending surface, the bending surface faces the shape memory alloy wire and can bend and deform in the direction of the shape memory alloy wire, the bending surface abuts against the movable part and one end is connected to the connecting rod, and the connecting rod drives the movable part to move through the elastic member.

[0008] According to some embodiments of the present invention, the number of the connecting rod, the elastic part and the fixing part in the driving component is two and they are symmetrically arranged left and right, and both ends of the shape memory alloy wire are respectively connected to one of the connecting rods.

[0009] According to some embodiments of the present invention, two sets of the driving components are provided, and the two sets of driving components are arranged opposite to each other up and down. One set of the driving components is used to drive the movable part to move upward, and the other set of the driving components is used to drive the movable part to move downward.

[0010] According to some embodiments of the present invention, it further includes a mounting plate, the mounting plate is arranged on the side of the lens assembly, and the driving component is mounted on the mounting plate.

[0011] According to some embodiments of the present invention, the movable part includes a side plate and a bearing plate, the side plate is in contact with the driving component, the bearing plate is connected to the side plate and is arranged facing the bottom surface of the lens assembly, and the image sensor is arranged on the bearing plate.

[0012] According to some embodiments of the present invention, a contact block is provided on the side plate, one end of the connecting rod abuts against the contact block, and the driving assembly drives the movable part to move by driving the contact block.

[0013] According to some embodiments of the present invention, the side plate and the mounting plate are oppositely arranged and opposite surfaces are provided with oppositely arranged sliding grooves, and the sliding grooves enclose to form a slideway, and balls or rollers are arranged in the slideway.

[0014] According to some embodiments of the present invention, the side plate includes a first plate member and a second plate member, the first plate member and the second plate member are connected in an L shape, the first plate member faces the mounting plate and is in contact with the driving assembly; the second plate member is connected to the bearing plate; the driving assembly drives the first plate member to move and drives the second plate member to move so as to drive the bearing plate to move.

[0015] According to some embodiments of the present invention, the bearing plate includes a third plate member and a fourth plate member, the third plate member and the fourth plate member sandwich the second plate member therebetween, hemispherical protrusions are provided in the third plate member and the fourth plate member, and the third plate member and the fourth plate member abut against the second plate member through the hemispherical protrusions.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above additional aspects and advantages of the present invention will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 is a schematic diagram of the overall structure of a lens module according to the first embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of the structure of a driving assembly according to the first embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the separated structure of a lens module according to the first embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of the overall structure of a lens module according to the second embodiment of the present invention;

[0022] Figure 5 is a schematic diagram of the connection structure between a driving assembly and a movable part according to the second embodiment of the present invention;

[0023] Figure 6 is a schematic diagram of the bottom structure of a movable part according to the second embodiment of the present invention.

[0024] Reference numerals:

[0025] Lens assembly 100, movable part 200, side plate 210, abutting block 211, carrier plate 220, first plate member 230, second plate member 240, third plate member 250, hemispherical protrusion 251, fourth plate member 260, connecting rod 310, elastic part 320, fixing part 330, shape memory alloy wire 340, elastic member 350, mounting plate 400, chute 410, ball 420, flexible circuit board 500. Detailed implementation manners

[0026] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0027] In the description of the present invention, it should be understood that with regard to the orientation description, such as the orientations or positional relationships indicated by up, down, front, back, left, right, etc. are based on the orientations or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, the meaning of several is one or more, the meaning of a plurality is two or more, greater than, less than, exceeding, etc. are understood as not including the recited number, and above, below, within, etc. are understood as including the recited number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0030] The following refers to Figures 1 to 6 to describe a lens module according to an embodiment of the present invention.

[0031] For example Figures 1 to 3As shown, the lens module according to an embodiment of the present invention includes a lens assembly 100, an image sensor, a movable part 200, and a driving assembly. The image sensor is located at the bottom of the lens assembly 100 and is used to receive the image signal transmitted by the lens assembly 100. The movable part 200 is connected to the image sensor and is used to drive the image sensor to move to adjust the distance between the image sensor and the lens assembly 100. The driving assembly includes a connecting rod 310, an elastic part 320, a fixing part 330, and a shape memory alloy wire 340. One end of the connecting rod 310 is connected to the shape memory alloy wire 340, and the other end is used to drive the movable part 200 to move. The elastic part 320 can be elastically bent. One end of the elastic part 320 is connected to the connecting rod 310, and the other end is connected to the fixing part 330. The shape memory alloy wire 340 can be electrically contracted to drive the connecting rod 310 to drive the movable part 200 to move.

[0032] For example Figures 1 to 3 As shown, the movable part 200 is located below the lens assembly 100. The image sensor is disposed on the movable part 200 and is located below the lens assembly 100. The driving assembly is connected to the movable part 200 and is used to drive the movable part 200 to move so as to adjust the positional relationship between the image sensor and the lens assembly 100, achieving functions of anti-shake or focusing. By adjusting the image sensor instead of the lens assembly 100 for focusing or anti-shake, since the image sensor is small in volume and light in weight, the driving force required for the lens module is smaller and the driving is more convenient. At the same time, the small volume of the image sensor enables the lens module to reserve a small space for the image sensor, thereby saving the thickness of the lens module in the axial direction.

[0033] The driving assembly includes a connecting rod 310, an elastic part 320, a fixing part 330, and a shape memory alloy wire 340. One end of the connecting rod 310 is connected to the shape memory alloy wire 340, and the other end abuts against the movable part 200 for driving the movable part 200 to move. One end of the elastic part 320 is connected to the connecting rod 310, and the other end is connected to the fixing part 330 and the elastic part 320 is bent in an S shape and can be elastically bent. The shape memory alloy wire 340 can be electrically contracted to drive the connecting rod 310 to drive the movable part 200 to move. When the shape memory alloy wire 340 is electrically contracted, the connecting rod 310 rotates with the fixing part 330 as the rotation axis, and the elastic part 320 is bent to drive the connecting rod 310 to drive the movable part 200 to move. Finally, the displacement amount of the movable part 200 driven is greater than the expansion and contraction amount of the shape memory alloy wire 340, so that a large driving amount can be realized when the volume of the driving assembly is small, which is beneficial to the miniaturization of the volume of the driving assembly, thereby making the volume of the lens module miniaturized.

[0034] According to the lens module of the embodiment of the present invention, by such setting, at least the following beneficial effects can be achieved: By driving the moving part 200 with the driving component, the distance between the image sensor and the lens component 100 can be adjusted to achieve focusing or anti-shake. By driving the image sensor to move instead of driving the lens component 100 to move, the driving force required for the lens module is smaller and the driving is more convenient. At the same time, the volume of the image sensor is small, so the space reserved for the image sensor by the lens module is also small, thereby saving the thickness of the lens module in the axial direction. At the same time, the driving component includes a connecting rod 310, an elastic part 320, a fixing part 330 and a shape memory alloy wire 340. The bending deformation of the elastic part 320 is driven by the telescopic deformation movement of the shape memory alloy wire 340, so that the connecting rod 310 drives the moving part 200 to move. Finally, the displacement of the moving part 200 driven is greater than the telescopic amount of the shape memory alloy wire 340, so that a large driving amount can be achieved under the condition of a small volume of the driving component, which is beneficial to the miniaturization of the volume of the driving component.

[0035] In some specific embodiments of the present invention, the driving component further includes an elastic member 350. The elastic member 350 includes a bent surface, the bent surface is arranged facing the shape memory alloy wire 340 and can be bent and deformed in the direction of the shape memory alloy wire 340. The bent surface abuts against the moving part 200 and one end is connected to the connecting rod 310. The connecting rod 310 drives the moving part 200 to move through the elastic member 350.

[0036] For example Figure 1 and Figure 2 As shown, the driving component further includes an elastic member 350. The elastic member 350 includes a bent surface, the bent surface is arranged facing the shape memory alloy wire 340 and can be bent and deformed in the direction of the shape memory alloy wire 340. The bent surface abuts against or is connected to the moving part 200, and the other end is connected to the connecting rod 310. When the shape memory alloy wire 340 is electrified and contracts, the shape memory alloy wire 340 exerts a force on the connecting rod 310. This force causes the connecting rod 310 to rotate with the fixing part 330 as the rotation axis, and the elastic part 320 is bent and deformed to rotate. When the connecting rod 310 rotates, the end of the connecting rod 310 connected to the bent part, that is, the bent part is bent, driving the moving part 200 to move, thereby adjusting the positional relationship between the image sensor and the lens component 100. By connecting the moving part 200 through the elastic member 350, since the elastic member 350 can be elastically deformed, during the process of driving the moving part 200 to move, the problem of wear caused by the relative movement of the connecting part of the elastic member 350 and the moving part 200 and the moving part 200 is avoided through the elastic deformation of the elastic member 350 and the elastic part 320, thereby improving the service life.

[0037] In some specific embodiments of the present invention, the number of the connecting rod 310, the elastic part 320, and the fixing part 330 in the driving assembly is two, and they are symmetrically arranged left and right. Both ends of the shape memory alloy wire 340 are respectively connected to a connecting rod 310.

[0038] For example Figure 1 and Figure 2 As shown, the number of the connecting rod 310, the elastic part 320, and the fixing part 330 in the driving assembly is two, and they are symmetrically arranged left and right. Both ends of the bending surface are respectively connected to a connecting rod 310, and both ends of the shape memory alloy wire 340 are respectively connected to a connecting rod 310. There are two connecting rods 310, two elastic parts 320, and two fixing parts 330 in the driving assembly, and they are symmetrically arranged left and right. Both ends of the shape memory alloy wire 340 are respectively connected to a connecting rod 310. When the shape memory alloy wire 340 expands and contracts, the two connecting rods 310 can be driven to rotate simultaneously, so that the driving mechanism has double driving force and is easier to drive. Further, both ends of the bending surface of the elastic member 350 are respectively connected to a connecting rod 310, and the elastic member 350 is fixedly connected to the movable part 200. When the shape memory alloy wire 340 is electrified and contracts, the two connecting rods 310 rotate simultaneously, so that the bending surface of the elastic member 350 bends to drive the movable part 200 to move, having a greater driving force.

[0039] In some specific embodiments of the present invention, two sets of driving assemblies are provided, and the two sets of driving assemblies are arranged vertically opposite to each other. One set of driving assembly is used to drive the movable part 200 to move upward, and the other set of driving assembly is used to drive the movable part 200 to move downward.

[0040] For example Figure 1 and Figure 2 As shown, two sets of driving assemblies are provided, and the two sets of driving assemblies are arranged vertically opposite to each other. The connecting rod 310 or the elastic member 350 of one set of driving assembly is connected to the bottom of the movable part 200 for driving the movable part 200 to move upward, and the connecting rod 310 or the elastic member 350 of the other set of driving assembly is connected to the top of the movable part 200 for driving the movable part 200 to move downward.

[0041] By providing two sets of vertically opposite driving assemblies to drive the movable part 200 and the image sensor from different directions, not only can the movable part 200 be driven to move from more directions to achieve focusing, but also the driving assemblies in the opposite direction can play a role in resetting, which is beneficial to the reset of the movable part 200.

[0042] In some specific embodiments of the present invention, it further includes a mounting plate 400. The mounting plate 400 is arranged on the side of the lens assembly 100, and the driving assembly is mounted on the mounting plate 400.

[0043] For example Figure 1 、 Figure 2 andFigure 3 As shown, the lens module further includes a mounting plate 400. The mounting plate 400 is disposed on the side of the lens assembly 100. The driving assembly is mounted on the mounting plate 400. The fixing portion 330 of the driving assembly is fixedly disposed on the mounting plate 400. One end of the elastic portion 320 is connected to the fixing portion 330, and the other end is connected to the connecting rod 310. One end of the connecting rod 310 is connected to the shape memory alloy wire 340, and the other end is connected to the fixing portion 330 through the elastic member 350. When the shape memory alloy wire 340 is energized and shrinks, the connecting rod 310 rotates and drives the movable portion 200 to move through the elastic member 350. Further, a notch is formed in the middle of the mounting plate 400. A part of the movable portion 200 is connected to the elastic member 350 of the driving assembly through the notch, which facilitates the driving assembly to drive the movable portion 200.

[0044] In some specific embodiments of the present invention, the movable portion 200 includes a side plate 210 and a carrier plate 220. The side plate 210 is in contact with the driving assembly. The carrier plate 220 is connected to the side plate 210 and is disposed toward the bottom surface of the lens assembly 100. The image sensor is disposed on the carrier plate 220.

[0045] For example Figure 1 and Figure 3 As shown, the movable portion 200 includes a side plate 210 and a carrier plate 220. The side plate 210 is in contact with the driving assembly. The carrier plate 220 is connected to the side plate 210 and is disposed toward the bottom surface of the lens assembly 100, so that the image sensor can be located at the bottom of the lens assembly 100 to receive the image signal transmitted by the lens assembly 100.

[0046] The side plate 210 is connected to the carrier plate 220. When the side plate 210 is driven by the driving assembly to move, the carrier plate 220 will move together with the side plate 210, thereby driving the image sensor to move to achieve focusing or anti-shake.

[0047] In some specific embodiments of the present invention, an abutting block 211 is provided on the side plate 210. One end of the connecting rod 310 abuts against the abutting block 211. The driving assembly drives the movable portion 200 to move by driving the abutting block 211.

[0048] For example Figure 1 and Figure 3 As shown, an abutting block 211 is provided on the side plate 210. A notch is formed in the mounting plate 400. The abutting block 211 passes through the notch and is connected to the connecting rod 310 or the elastic member 350 of the driving assembly. The notch has a certain length, so that the abutting block 211 can make a certain displacement in the notch under the drive of the driving assembly, and the length of the notch can play a role in limiting the abutting block 211 to prevent the displacement amount of the abutting block 211 and the side plate 210 from being too large.

[0049] By providing the abutting block 211, the driving component can easily drive the movable part 200, and the movable part 200 is easier to install and more stable during installation.

[0050] In some specific embodiments of the present invention, the side plate 210 and the mounting plate 400 are oppositely arranged, and oppositely arranged sliding grooves 410 are formed on the opposite surfaces. The sliding grooves 410 enclose to form a slideway, and balls 420 or rollers are arranged in the slideway.

[0051] For example Figure 2 and Figure 3 As shown, the side plate 210 and the mounting plate 400 are oppositely arranged, and oppositely arranged sliding grooves 410 are formed on the opposite surfaces of the side plate 210 and the mounting plate 400. The sliding grooves 410 on the side plate 210 and the mounting plate 400 enclose to form a slideway, and balls 420 or rollers are arranged in the slideway. By such an arrangement, the mutual movement between the movable part 200 and the mounting plate 400 is changed from static friction to dynamic friction, which can effectively reduce the frictional force, making the movable part 200 easier to drive and not easily worn, increasing the service life and precision. And the arrangement of the slideway and the balls 420 and rollers provides a guiding function for the movement of the movable part 200, restricting the moving direction of the movable part 200, and making the movement of the movable part 200 more precise and easier to control.

[0052] Furthermore, magnetic members are embedded in the mutually approaching side walls of the side plate 210 and the mounting plate 400. The side plate 210 and the mounting plate 400 can be mutually abutted through the magnetic force of the magnetic members, and the mutual movement between the side plate 210 and the mounting plate 400 is realized through the balls 130 and rollers.

[0053] Even further, a baffle can be provided on the lens module. The baffle is arranged above the slideway to prevent the balls 420 or rollers from sliding out of the slideway. At the same time, the baffle can play a certain restricting role in the movement of the movable part 200, preventing the moving distance of the movable part 200 from being too large, and playing a certain limiting role.

[0054] In some specific embodiments of the present invention, the side plate 210 includes a first plate member 230 and a second plate member 240. The first plate member 230 and the second plate member 240 are connected in an L shape. The first plate member 230 faces the mounting plate 400 and is in contact with the driving component; the second plate member 240 is connected to the carrier plate 220; the driving component drives the first plate member 230 to move, driving the second plate member 240 to move, thereby driving the carrier plate 220 to move.

[0055] For example Figures 4 to 6As shown, the side plate 210 includes a first plate member 230 and a second plate member 240. The first plate member 230 and the second plate member 240 are connected in an L shape. The first plate member 230 is disposed at the mounting plate 400 and faces the mounting plate 400. The elastic member 350 of the driving assembly is fixedly connected to the first plate member 230. The driving assembly can drive the connecting rod 310 to rotate and drive the first plate member 230 to move by the energized contraction of the shape memory alloy wire 340. The first plate member 230 and the second plate member 240 are fixedly connected. When the first plate member 230 moves, it drives the second plate member 240 to move together. The second plate member 240 is connected to the carrier plate 220 and is located at the bottom of the carrier plate 220. When the second plate member 240 moves, it can drive the carrier plate 220 to move. The image sensor is disposed on the carrier plate 220, so that the image sensor can move to achieve the functions of focusing or anti-shake.

[0056] In some specific embodiments of the present invention, the carrier plate 220 includes a third plate member 250 and a fourth plate member 260. The third plate member 250 and the fourth plate member 260 sandwich the second plate member 240 therebetween. Hemispherical protrusions 251 are provided in the third plate member 250 and the fourth plate member 260. The third plate member 250 and the fourth plate member 260 are in contact with the second plate member 240 through the hemispherical protrusions 251.

[0057] For example Figure 5 and Figure 6 As shown, the carrier plate 220 includes a third plate member 250 and a fourth plate member 260. The third plate member 250 and the fourth plate member 260 sandwich the second plate member 240 therebetween. Hemispherical protrusions 251 are provided in the third plate member 250 and the fourth plate member 260. The third plate member 250 and the fourth plate member 260 are in contact with the second plate member 240 through the hemispherical protrusions 251. By providing the hemispherical protrusions 251, the friction between the second plate member 240 and the carrier plate 220 is reduced, and the movement of the carrier plate 220 is more flexible.

[0058] Furthermore, the lens module further includes a flexible circuit board 500. For example Figure 1 、 Figure 2 and Figure 3 As shown, the flexible circuit board 500 is connected to the image sensor and the main board of the imaging device, and converts the information collected by the image sensor into an electrical signal and transmits it to the main board of the imaging device. Furthermore, the portion of the flexible circuit board 500 connected to the image sensor is arranged in an S-shaped fold. By such an arrangement, it is convenient for the movable part 200 to drive the image sensor to move. When the image sensor moves, the S-shaped arrangement of the flexible circuit board 500 makes the portion of the flexible circuit board 500 connected to the image sensor easy to move together with the image sensor, reserves some length for the movement of the image sensor, and makes the connection between the flexible circuit board 500 and the image sensor more stable.

[0059] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0060] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lens module, characterized in that, Comprising: A lens assembly (100); An image sensor located at the bottom of the lens assembly (100), the image sensor being configured to receive an image signal transmitted by the lens assembly (100); A movable part (200) connected to the image sensor, the movable part (200) being configured to drive the image sensor to move to adjust the distance between the image sensor and the lens assembly (100); A driving assembly including a connecting rod (310), an elastic part (320), a fixing part (330), and a shape memory alloy wire (340). One end of the connecting rod (310) is connected to the shape memory alloy wire (340), and the other end is configured to drive the movable part (200) to move. The elastic part (320) can be elastically bent. One end of the elastic part (320) is connected to the connecting rod (310), and the other end is connected to the fixing part (330). The shape memory alloy wire (340) can be energized to contract to drive the connecting rod (310) to drive the movable part (200) to move; A mounting plate (400) disposed on the side of the lens assembly (100), the driving assembly being mounted on the mounting plate (400), and a notch being formed on the mounting plate (400); The movable part (200) includes a side plate (210) and a bearing plate (220). An abutting block (211) is provided on the side plate (210). The abutting block (211) passes through the notch and abuts against one end of the connecting rod (310) of the driving assembly. The driving assembly drives the movable part (200) to move by driving the abutting block (211). The abutting block (211) makes a certain displacement in the notch under the drive of the driving assembly. The bearing plate (220) is connected to the side plate (210) and is disposed facing the bottom surface of the lens assembly (100), and the image sensor is disposed on the bearing plate (220).

2. The lens module according to claim 1, wherein The driving assembly further includes an elastic member (350). The elastic member (350) includes a bent surface facing the shape memory alloy wire (340) and capable of bending and deforming in the direction of the shape memory alloy wire (340). The bent surface abuts against the movable part (200) and one end is connected to the connecting rod (310). The connecting rod (310) drives the movable part (200) to move through the elastic member (350).

3. The lens module according to claim 1, wherein The number of the connecting rod (310), the elastic part (320), and the fixing part (330) in the driving assembly is two and they are symmetrically arranged left and right. Both ends of the shape memory alloy wire (340) are respectively connected to one connecting rod (310).

4. The lens module according to claim 1, wherein Two sets of the driving assemblies are provided, and the two sets of the driving assemblies are arranged up and down opposite to each other. One set of the driving assemblies is configured to drive the movable part (200) to move upward, and the other set of the driving assemblies is configured to drive the movable part (200) to move downward.

5. The lens module according to claim 1, wherein The side plate (210) and the mounting plate (400) are arranged opposite to each other and opposite surfaces are provided with oppositely arranged sliding grooves (410), the sliding grooves (410) are enclosed to form a slideway, and the slideway is provided with balls (420) or rollers.

6. The lens module according to claim 1, wherein, The side plate (210) includes a first plate member (230) and a second plate member (240), wherein the first plate member (230) and the second plate member (240) are connected in an L-shape, wherein the first plate member (230) is disposed toward the mounting plate (400) and is in contact with the driving component; the second plate member (240) is connected to the supporting plate (220); and the driving component drives the first plate member (230) to move, thereby driving the second plate member (240) to move, and thereby driving the supporting plate (220) to move.

7. The lens module according to claim 6, wherein The supporting plate (220) includes a third plate member (250) and a fourth plate member (260), wherein the third plate member (250) and the fourth plate member (260) clamp the second plate member (240) therebetween, and the third plate member (250) and the fourth plate member (260) are provided with hemispherical protrusions (251), and the third plate member (250) and the fourth plate member (260) are in contact with the second plate member (240) via the hemispherical protrusions (251).

Images