Lens module and imaging device having the same

Abstract

The present invention discloses a lens module and an imaging device having the same. The lens module includes a lens barrel, a movable part, and a driving component. An accommodation space is provided inside the lens barrel; the movable part is used to carry an image sensor, and the part of the movable part for carrying the image sensor is located below the accommodation space; the driving component includes an elastic arm and a shape memory alloy wire. The elastic arm includes a fixed end and a free end, the free end abuts against the movable part, one end of the shape memory alloy wire is fixedly arranged, and the other end is connected to the elastic arm. When the shape memory alloy wire is energized and contracts, it drives the elastic arm to rotate, so that the free end drives the movable part to move. The lens module according to the embodiment of the present invention has a low cost, a simple structure and a small occupied space, which is beneficial to reducing the volume of the imaging device.

Description

Technical Field

[0001] The present invention relates to the field of imaging technology, and particularly to a lens module and an imaging device having the same. 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 received in the lens barrel, and the image sensor is disposed on the lens holder.

[0003] The existing focusing lens module uses a driving motor or a voice coil motor 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, this kind of 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 thin, light, short, and small camera module. 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. To this end, the present invention provides a lens module, which has low cost, simple structure, and small occupied space, and is beneficial to reducing the volume of the imaging device.

[0005] The present invention also provides an imaging device having the above lens module.

[0006] The lens module according to the first aspect embodiment of the present invention includes a lens barrel, a movable part, and a driving component. An accommodation space is provided in the lens barrel. The movable part is used for carrying the image sensor, and the part of the movable part for carrying the image sensor is located below the accommodation space. The driving component includes an elastic arm and a shape memory alloy wire. The elastic arm includes a fixed end and a free end. The free end abuts against the movable part. One end of the shape memory alloy wire is fixedly arranged, and the other end is connected to the elastic arm. The shape memory alloy wire contracts when electrified to drive the elastic arm to rotate, so that the free end drives the movable part to move.

[0007] The lens module according to an embodiment of the present invention can achieve at least the following technical effects by such an arrangement: A receiving space is provided in the lens barrel for placing the lens assembly. The movable part is used to carry the image sensor, and the part for carrying the image sensor is located below the receiving space, so that the image sensor can be located at the bottom of the lens assembly. By driving the movable part with the driving component, the distance between the image sensor and the lens assembly can be adjusted to achieve focusing or anti-shake. By driving the image sensor to move instead of driving the lens assembly to move, the driving force required for the lens module is smaller and the driving is more convenient. At the same time, the image sensor has a small volume, so that the space reserved for the image sensor in 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 an elastic arm and a shape memory alloy wire. By driving the shape memory alloy wire to contract when energized, the free end of the elastic arm drives the movable part. Driving with the shape memory alloy wire can further reduce the volume of the lens module, and the connection between the shape memory alloy wire and the elastic arm can form a lever effect to further amplify the driving force and make it easier to drive.

[0008] According to some embodiments of the present invention, the movable part includes a side plate and a carrier plate. The side plate is arranged on the side of the lens barrel, and the carrier plate is connected to the side plate and located at the bottom of the receiving space. The carrier plate is used to carry the image sensor.

[0009] According to some embodiments of the present invention, an abutting block is arranged on the side plate, the free end of the elastic arm abuts against the abutting block, and the driving component drives the movable part to move by driving the abutting block.

[0010] According to some embodiments of the present invention, the elastic arm includes a first elastic arm and a second elastic arm. The free end of the first elastic arm abuts against the top of the abutting block, and the free end of the second elastic arm abuts against the bottom of the abutting block.

[0011] According to some embodiments of the present invention, opposite chutes are provided on the side plate and the side wall of the lens barrel. The chutes enclose a slideway, and balls and / or rollers are arranged in the slideway.

[0012] According to some embodiments of the present invention, a bearing is further included. The bearing is arranged between the side wall of the lens barrel and the side plate, and the side plate abuts against the side wall of the lens barrel through the bearing.

[0013] According to some embodiments of the present invention, magnetic members are embedded in the side plate and the side wall of the lens barrel, and the side plate and the side wall of the lens barrel abut against each other through the magnetic force of the magnetic members.

[0014] According to some embodiments of the present invention, the elastic arm further includes a bent portion, and the elastic arm is connected to the fixed end through the bent portion; one end of the shape memory alloy wire connected to the elastic arm is located between the bent portion and the free end, and the elastic arm is bent through the bent portion so that the free end moves to drive the movable portion.

[0015] According to some embodiments of the present invention, the distance from the end of the shape memory alloy wire connected to the elastic arm to the bent portion is less than the distance to the free end.

[0016] The imaging device according to the second aspect embodiment of the present invention includes the lens module according to the first aspect embodiment of the present invention above.

[0017] The imaging device according to the embodiment of the present invention has at least the following beneficial effects: by adopting the above lens module, the volume of the imaging device is effectively reduced, and the cost is low and the structure is simple.

[0018] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a schematic diagram of the overall external structure of the lens module according to the embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the internal structure of the lens module according to the embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the driving component structure of the lens module according to the embodiment of the present invention;

[0023] Figure 4 is a top view of the internal structure of the first embodiment of the lens module according to the embodiment of the present invention;

[0024] Figure 5 is a top view of the internal structure of the second embodiment of the lens module according to the embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of the overall structure of the lens module according to the embodiment of the present invention.

[0026] Reference numerals:

[0027] Lens barrel 100, lens assembly 110, sliding groove 120, ball 130, bearing 140,

[0028] Activity Department 200, side plate 210, abutting block 211, bearing plate 220,

[0029] Elastic arm 310, first elastic arm 310a, second elastic arm 320b, fixed end 311, free end 312, bending part 313, shape memory alloy wire 320, flexible circuit board 400, baffle 500, housing 600. Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the 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 with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and 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 to the present invention.

[0032] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present 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 quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] 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, and 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.

[0034] Next, refer to Figures 1 to 6 to describe the lens module and the imaging device according to the embodiments of the present invention.

[0035] For example Figure 2 、 Figure 3 and Figure 6As shown, the lens module according to an embodiment of the present invention includes a lens barrel 100, a movable part 200, and a driving component. A receiving space is provided in the lens barrel 100; the movable part 200 is used to carry an image sensor, and the part of the movable part 200 for carrying the image sensor is located below the receiving space; the driving component includes an elastic arm 310 and a shape memory alloy wire 320. The elastic arm 310 includes a fixed end 311 and a free end 312. The free end 312 abuts against the movable part 200. One end of the shape memory alloy wire 320 is fixedly arranged, and the other end is connected to the elastic arm 310. When the shape memory alloy wire 320 is energized and contracts, it drives the elastic arm 310 to rotate, so that the free end 312 drives the movable part 200 to move.

[0036] For example Figure 2 、 Figure 3 and Figure 6 As shown, the lens module includes a lens barrel 100, a movable part 200, and a driving component. A receiving space is provided in the lens barrel 100, and the receiving space can be used to place the lens assembly 110. For example Figure 2 and Figure 4 As shown. The movable part 200 is used to carry an image sensor, and the part of the movable part 200 for carrying the image sensor is located below the receiving space. For example Figure 6 As shown. By setting it in this way, the image sensor can be located at the bottom of the lens assembly 110 and can receive the image signal transmitted by the lens assembly 110. By driving the driving component, the movable part 200 can be driven to move, and the movable part 200 drives the image sensor to move, so as to adjust the positional relationship between the image sensor and the lens assembly 110 to achieve the functions of lens focusing or anti-shake. Since the image sensor is small in size and light in weight, by moving the image sensor to achieve focusing or anti-shake instead of driving the lens assembly 110, the requirement for the driving force can be reduced, and the space reserved for the image sensor in the lens module is also small, thereby saving the thickness of the lens module in the axial direction.

[0037] The driving component includes an elastic arm 310 and a shape memory alloy wire 320. The elastic arm 310 includes a fixed end 311 and a free end 312. The free end 312 abuts against the movable part 200. One end of the shape memory alloy wire 320 is fixedly arranged, and the other end is connected to the elastic arm 310. When the shape memory alloy wire 320 is energized and contracts, it drives the elastic arm 310 to rotate, so that the free end 312 drives the movable part 200 to move.

[0038] For example Figure 2 and Figure 3As shown in the figure, the driving component includes an elastic arm 310 and a shape memory alloy wire 320. The elastic arm 310 includes a fixed end 311 and a free end 312. The fixed end 311 is fixedly arranged, and the free end 312 abuts against the movable part 200, such as abutting against the abutting block 211 of the movable part 200. One end of the shape memory alloy wire 320 is fixedly arranged, and the other end is connected to the elastic arm 310. When the shape memory alloy wire 320 is energized and shrinks, the shape memory alloy wire 320 can pull the elastic arm 310 to rotate, so that the free end 312 of the elastic arm 310 pushes the movable part 200 to move, thereby adjusting the positional relationship between the image sensor and the lens module 110, so as to achieve focusing or anti-shake. For example, the elastic arm 310 drives the movable part 200 to move upward so that the image sensor and the lens module 110 approach each other to achieve focusing. It is easy to understand that the shape memory alloy wire 320 is connected to the middle part of the elastic arm 310, playing the role of a lever to amplify the stroke, that is, the distance that the free end 312 of the elastic arm 310 moves is greater than the distance that the shape memory alloy wire 320 shrinks, and the magnification of the stroke can be changed according to the position where the shape memory alloy wire 320 is connected to the elastic arm 310.

[0039] According to the lens module of the embodiment of the present invention, by such a setting, at least the following beneficial effects can be achieved: by driving the driving component to drive the movable part 200 to move, the distance between the image sensor and the lens module 110 can be adjusted to achieve focusing or anti-shake. By driving the image sensor to move instead of driving the lens module 110 to move, the driving force required for the lens module is smaller and the driving is more convenient. At the same time, the image sensor has a small volume, so that the space reserved for the image sensor in 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 an elastic arm 310 and a shape memory alloy wire 320. By driving the shape memory alloy wire 320 to contract when energized, the free end 312 of the elastic arm 310 drives the movable part 200. Driving by the shape memory alloy wire 320 can further reduce the volume of the lens module, and the connection between the shape memory alloy wire 320 and the elastic arm 310 can form a lever effect so that the driving force can be further amplified and it is easier to drive.

[0040] In some specific embodiments of the present invention, the movable part 200 includes a side plate 210 and a carrier plate 220. The side plate 210 is arranged on the side surface of the lens barrel 100, and the carrier plate 220 is connected to the side plate 210 and is located at the bottom of the accommodation space. The carrier plate 220 is used to carry the image sensor.

[0041] For example Figure 3 and Figure 6As shown, the movable part 200 includes a side plate 210 and a carrier plate 220. The side plate 210 is disposed on the side of the lens, in contact with the driving component, and is driven by the driving component so that the movable part 200 can drive the image sensor to move. The carrier plate 220 is connected to the side plate 210 and is located at the bottom of the accommodation space. The carrier plate 220 is used to carry the image sensor. Since the carrier plate 220 is located at the bottom of the accommodation space, the image sensor is located below the lens assembly 110 and can be used to receive the image signal transmitted by the lens assembly 110.

[0042] The movable part 200 includes a side plate 210 and a carrier plate 220. The side plate 210 and the carrier plate 220 are connected to each other in a T shape. The image sensor is carried by the carrier plate 220. The side plate 210 is driven by the driving component to move, thereby driving the carrier plate 220 to drive the image sensor to move together, so as to adjust the positional relationship between the image sensor and the lens assembly 110 to achieve the functions of focusing or anti-shake.

[0043] In some specific embodiments of the present invention, a contact block 211 is provided on the side plate 210. The free end 312 of the elastic arm 310 abuts against the contact block 211, and the driving component drives the movable part 200 to move by driving the contact block 211.

[0044] For example Figure 3 and Figure 6 As shown, a contact block 211 is provided on the side plate 210. The free end 312 of the elastic arm 310 abuts against the contact block 211. The driving component drives the side plate 210 to move by driving the contact block 211, thereby driving the entire movable part 200 to move. The driving component is installed on the outer side wall of the lens. The carrier plate 220 is disposed in the accommodation space inside the lens barrel 100. A notch is formed on the side wall of the lens barrel 100, so that the contact block 211 of the movable part 200 can protrude from the notch and abut against the free end 312 of the elastic arm 310 of the driving component.

[0045] In some specific embodiments of the present invention, the elastic arm 310 includes a first elastic arm 310a and a second elastic arm 310b. The free end 312 of the first elastic arm 310a abuts against the top of the contact block 211, and the free end 312 of the second elastic arm 310b abuts against the bottom of the contact block 211.

[0046] For example Figure 2 and Figure 3 As shown, the elastic arm 310 includes a first elastic arm 310a and a second elastic arm 310b. The free end 312 of the first elastic arm 310a abuts against the top of the contact block 211, so that the driving component can drive the movable part 200 downward. The free end 312 of the second elastic arm 310b abuts against the bottom of the contact block 211, so that the driving component can drive the movable part 200 upward.

[0047] Through the arrangement of the first elastic arm 310a and the second elastic arm 310b, the driving assembly can drive the movable part 200 to move up and down, so that the image sensor can approach or move away from the lens assembly 110 to achieve the focusing function.

[0048] In some specific embodiments of the present invention, sliding grooves 120 are provided on the side plate 210 and the side wall of the lens barrel 100 and are arranged opposite to each other. The sliding grooves 120 enclose a slideway, and balls 130 and / or rollers are arranged in the slideway.

[0049] For example Figure 4 As shown, sliding grooves 120 are provided on the side plate 210 and the side wall of the lens barrel 100 and are arranged opposite to each other. The sliding grooves 120 enclose a slideway, and balls 130 and / or rollers are arranged in the slideway. Through such an arrangement, the mutual movement between the movable part 200 and the lens changes 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 accuracy. And the arrangement of the slideway and the balls 130 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 easy to control.

[0050] Furthermore, a baffle 500 can be provided on the lens module. The baffle 500 is arranged above the slideway to prevent the balls 130 or rollers from sliding out of the slideway. At the same time, the baffle 500 can play a certain limiting 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.

[0051] In some specific embodiments of the present invention, a bearing 140 is further included. The bearing 140 is arranged between the side wall of the lens barrel 100 and the side plate 210, and the side plate 210 abuts against the side wall of the lens barrel 100 through the bearing 140.

[0052] For example Figure 5 As shown, the lens module further includes a bearing 140. The bearing 140 is arranged between the side wall of the lens barrel 100 and the side plate 210, and the side plate 210 abuts against the side wall of the lens barrel 100 through the bearing 140. The bearing 140 can adopt a planar rolling bearing 140.

[0053] Through the arrangement of the bearing 140, the mutual movement between the side plate 210 and the lens side wall changes from static friction to dynamic friction, which can effectively reduce the frictional force, making the movable part 200 easier to drive. And the arrangement of the bearing 140 is simpler, without the need to process the sliding grooves 120 on the lens barrel 100 or the side plate 210 anymore. And the width of the bearing 140 is small, which will not increase the distance between the side wall of the lens barrel 100 and the side plate 210, will not increase the volume of the imaging device, and the cost is lower.

[0054] In the present invention Figure 4 The illustrated embodiment provides an implementation manner of providing a sliding chute 120 slideway and using balls 130 and / or ball bearings 130 to change the mutual movement between the side plate 210 and the side wall of the lens barrel 100 from static friction to dynamic friction. Figure 5 An implementation manner of providing a bearing 140 between the side plate 210 and the side wall of the lens barrel 100 to change the mutual movement between the side plate 210 and the side wall of the lens barrel 100 from static friction to dynamic friction is provided. Two rows of slideways and two rows of bearings 140 are provided in both of these two embodiments. In fact, these two methods can not only be used alternatively, but also be used simultaneously, both within the protection scope of the present invention. That is, the method of using slideway balls 130, ball bearings 130 and bearings 140 at the same time, using the slideway to cooperate with balls 130 and / or ball bearings 130 on one side of the side plate 210 and using the bearing 140 on the other side. Through this setting method, the cost can be reduced and the structure can be simplified, and a moving track is provided for the mutual movement between the side plate 210 and the side wall of the lens, so that the movable part 200 has a certain moving track, the movement is more accurate and the control is more convenient.

[0055] In some specific embodiments of the present invention, magnetic members are embedded in the side walls of the side plate 210 and the lens barrel 100, and the side plate 210 and the side wall of the lens barrel 100 are abutted against each other by the magnetic force of the magnetic members.

[0056] Magnetic members are embedded in the side walls of the side plate 210 and the lens barrel 100, and the side plate 210 and the side wall of the lens barrel 100 can be abutted against each other by the magnetic force of the magnetic members, and then the mutual movement between the side plate 210 and the side wall of the lens barrel 100 is realized through balls 130, ball bearings 130 or bearings 140.

[0057] The side plate 210 is closely attached to the side wall of the lens barrel 100 by the magnetic force of the magnetic member, and the driving assembly is installed on the outer side wall of the lens barrel 100, so that the driving assembly can conveniently drive the movable part 200, thereby adjusting the positional relationship between the image sensor and the lens assembly 110 to achieve focusing or anti-shake.

[0058] In some specific embodiments of the present invention, the elastic arm 310 further includes a bent portion 313, and the elastic arm 310 is connected to the fixed end 311 through the bent portion 313; one end of the shape memory alloy wire 320 connected to the elastic arm 310 is located between the bent portion 313 and the free end 312, and the elastic arm 310 is bent through the bent portion 313 to move the free end 312 to drive the movable part 200.

[0059] For example Figure 2 and Figure 3As shown, the elastic arm 310 further includes a bending portion 313. The elastic arm 310 is connected to the fixed end 311 through the bending portion 313. One end of the shape memory alloy wire 320 connected to the elastic arm 310 is located between the bending portion 313 and the free end 312. The elastic arm 310 is bent through the bending portion 313 so that the free end 312 moves, thereby driving the abutting block 211 to drive the movable portion 200 to move to adjust the position of the image sensor. The bending portion 313 of the elastic arm 310 is sheet-shaped and is arranged facing the shape memory alloy wire 320, so that the bending portion 313 is easily bent in the direction of stretching towards the shape memory alloy wire 320, and the elastic arm 310 is easily bent.

[0060] One end of the shape memory alloy wire 320 is fixed, and the other end is arranged on the elastic arm 310. One end of the elastic arm 310 is fixedly arranged, and the free end 312 abuts against the abutting block 211. When the shape memory alloy wire 320 is energized and contracts, the shape memory alloy wire 320 can pull the free end 312 of the elastic arm 310 to bend around the bending portion 313 and drive the movable portion 200 upward or downward.

[0061] In some specific embodiments of the present invention, the distance from the end of the shape memory alloy wire 320 connected to the elastic arm 310 to the bending portion 313 is less than the distance to the free end 312.

[0062] For example Figure 2 and Figure 3 As shown, the distance from the end of the shape memory alloy wire 320 connected to the elastic arm 310 to the bending portion 313 is less than the distance to the free end 312. By setting it like this, the driving stroke of the shape memory alloy wire 320 can be further amplified. The distance from the end of the shape memory alloy wire 320 connected to the elastic arm 310 to the bending portion 313 is less than the distance to the free end 312, which can form a lever effect and amplify the stroke of the shape memory alloy wire 320 to more than twice, which is beneficial to the driving of the movable portion 200.

[0063] The imaging device according to the second aspect embodiment of the present invention includes the lens module according to the first aspect embodiment of the present invention above.

[0064] The imaging device according to the embodiment of the present invention, by adopting the above lens module, reduces the volume of the device, and has a lower cost and a simple structure. Further, the imaging device further includes a flexible circuit board 400, for example Figure 2 , Figure 5 and Figure 6As shown, the flexible circuit board 400 is connected to the main board of the image sensor and 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. Further, the portion of the flexible circuit board 400 connected to the image sensor is arranged in a Z-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 Z-shaped arrangement of the flexible circuit board 400 enables the portion of the flexible circuit board 400 connected to the image sensor to easily move together with the image sensor, reserving some length for the movement of the image sensor, and making the connection between the flexible circuit board 400 and the image sensor more stable. Further, the imaging device further includes a housing 600, for example Figure 1 As shown, the lens module, the lens assembly 110 and the image sensor are all installed in the housing 600, and the housing 600 plays a protective role for the lens module, the lens assembly 110 and the image sensor.

[0065] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means 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 representations 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 any one or more embodiments or examples in a suitable manner.

[0066] 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 barrel (100) having an accommodation space provided therein; A movable part (200), the movable part (200) including a side plate (210) and a carrier plate (220), the side plate (210) being disposed on the side of the lens barrel (100), the carrier plate (220) being connected to the side plate (210) and located at the bottom of the accommodation space, the carrier plate (220) being used for carrying an image sensor; a contact block (211) is provided on the side plate (210), and the driving assembly drives the movable part (200) to move by driving the contact block (211); A driving assembly, the driving assembly including an elastic arm (310) and a shape memory alloy wire (320), the elastic arm (310) including a fixed end (311) and a free end (312), the free end (312) being in contact with the movable part (200), one end of the shape memory alloy wire (320) is fixedly provided, and the other end is connected to the elastic arm (310), and the shape memory alloy wire (320) is connected to the middle part of the elastic arm (310), the shape memory alloy wire (320) contracts when electrified to drive the elastic arm (310) to rotate so that the free end (312) drives the movable part (200) to move; the elastic arm (310) includes a first elastic arm (310a) and a second elastic arm (310b), the free end (312) of the first elastic arm (310a) is in contact with the top of the contact block (211), and the free end (312) of the second elastic arm (310b) is in contact with the bottom of the contact block (211).

2. The lens module according to claim 1, wherein Oppositely arranged sliding grooves (120) are formed on the side plate (210) and the side wall of the lens barrel (100), the sliding grooves (120) enclose to form a slideway, and balls (130) and / or rollers are arranged in the slideway.

3. The lens module according to claim 1, wherein It further includes a bearing (140), the bearing (140) is disposed between the side wall of the lens barrel (100) and the side plate (210), and the side plate (210) is in contact with the side wall of the lens barrel (100) through the bearing (140).

4. The lens module according to claim 1, wherein Magnetic members are embedded in the side plate (210) and the side wall of the lens barrel (100), and the side plate (210) and the side wall of the lens barrel (100) are in contact with each other by the magnetic force of the magnetic members.

5. The lens module according to claim 1, wherein The elastic arm (310) further includes a bending part (313), and the elastic arm (310) is connected to the fixed end (311) through the bending part (313); the end of the shape memory alloy wire (320) connected to the elastic arm (310) is located between the bending part (313) and the free end (312), and the elastic arm (310) bends through the bending part (313) so that the free end (312) moves to drive the movable part (200).

6. The lens module according to claim 5, wherein The distance from the end of the shape memory alloy wire (320) connected to the elastic arm (310) to the bending part (313) is less than the distance to the free end (312).

7. A camera device, characterized in that, Comprising the lens module according to any one of claims 1 to 6.

Images