WO2021017181A1

WO2021017181A1 - Camera module and lens assembly thereof, and mobile terminal

Info

Publication number: WO2021017181A1
Application number: PCT/CN2019/111287
Authority: WO
Inventors: 李勇; 安在煜; 瞿佳佳; 张兵; 李强
Original assignee: 南昌欧菲光电技术有限公司
Priority date: 2019-07-30
Filing date: 2019-10-15
Publication date: 2021-02-04
Also published as: CN210626755U

Abstract

Disclosed is a lens assembly (10c), comprising: a lens cone (100), a first lens unit (200), a second lens unit (300), a first piezoelectric driver (400), and a second piezoelectric driver (500), wherein the lens cone (100) comprises an object-side end (102) and an image-side end (104); the first lens unit (200) and the second lens unit (300) are accommodated in the lens cone (100), and the first lens unit (200) and the second lens unit (300) are sequentially arranged from the object-side end (102) to the image-side end (104); the first piezoelectric driver (400) comprises a first piezoelectric deformation portion (410) and a first driving rod (420) connected to each other, and the first piezoelectric deformation portion (410) is provided at the object-side end (102) of the lens cone (100); and the second piezoelectric driver (500) comprises a second piezoelectric deformation portion (510) and a second driving rod (520) connected to each other, and the second piezoelectric deformation portion (510) is provided at the image-side end (104) of the lens cone (100). The first driving rod (420) and the second driving rod (520) are provided in parallel with an optical axis of the lens assembly (10c). When a voltage is applied to the first piezoelectric deformation portion (410), the first piezoelectric deformation portion (410) vibrates due to deformation, so as to drive the first driving rod (420) and the first lens unit (200) to move back and forth in a direction parallel to the optical axis. When a voltage is applied to the second piezoelectric deformation portion (510), the second piezoelectric deformation portion (510) vibrates due to deformation, so as to drive the second driving rod (520) and the second lens unit (300) to move back and forth in the direction parallel to the optical axis.

Description

Camera module and its lens assembly and mobile terminal

Technical field

The present invention relates to the field of camera technology, and in particular to a camera module, its lens assembly and a mobile terminal.

Background technique

Mobile terminals such as mobile phones and tablet computers are usually equipped with camera modules, which have the function of acquiring images. Since the mainstream development trend of mobile terminals is light and thin, correspondingly, the mainstream development trend of camera modules attached to mobile terminals is also light and thin. Limited by the development trend of the thinner and lighter camera modules of mobile terminals, the camera modules of mobile terminals usually do not have an optical zoom function, resulting in the camera performance of mobile terminal camera modules being comparable to those of traditional relatively large digital camera products. There is a certain gap in performance. Among them, optical zoom is different from digital zoom. Through digital zoom, the shooting scene is enlarged, but its sharpness will decrease, while optical zoom uses the lens of the lens to move to zoom in and out the scene to be photographed. The higher the optical zoom speed , The farther the scene can be shot, and the sharpness will not be affected.

With the development of the camera module industry technology for mobile terminals, optical zoom camera modules are bound to become one of the technological development directions and a new bright spot in the field of mobile terminals. How to obtain an optical zoom and thinner camera module is an urgent problem to be solved.

Summary of the invention

According to various embodiments of the present application, a camera module, a lens assembly thereof, and a mobile terminal are provided.

A lens assembly including:

The lens barrel, including the object side and the image side;

The first lens unit is housed in the lens barrel;

The second lens unit is accommodated in the lens barrel, and the first lens unit and the second lens unit are arranged in order from the object side end to the image side end;

The first piezoelectric actuator includes a first piezoelectric deformable portion and a first drive rod connected, the first piezoelectric deformable portion is provided at the object side end of the lens barrel, and the first drive rod is connected to the The optical axis of the lens assembly is arranged in parallel and connected to the first lens unit. When a voltage is applied to the first piezoelectric deformable portion, the first piezoelectric deformable portion vibrates due to deformation, thereby driving the The first driving rod and the first lens unit move back and forth in a direction parallel to the optical axis; and

The second piezoelectric actuator includes a connected second piezoelectric deforming part and a second driving rod. The second piezoelectric deforming part is provided on the image side end of the lens barrel, and the second driving rod is connected to the second driving rod. The optical axis of the lens assembly is arranged in parallel and connected to the second lens unit. When a voltage is applied to the second piezoelectric deforming part, the second piezoelectric deforming part vibrates due to deformation, thereby driving the The second driving rod and the second lens unit move back and forth in a direction parallel to the optical axis.

A camera module includes:

The aforementioned lens assembly;

A circuit board is provided on the image side end of the lens barrel and is electrically connected to the first piezoelectric deformable portion and the second piezoelectric deformable portion; and

The photosensitive chip is arranged on the circuit substrate, is electrically connected to the circuit substrate, and is located in the lens barrel.

A mobile terminal includes the aforementioned camera module.

The details of one or more embodiments of the present invention are set forth in the following drawings and description. Other features, objects and advantages of the present invention will become apparent from the description, drawings and claims.

Description of the drawings

In order to better describe and illustrate the embodiments and/or examples of the inventions disclosed herein, one or more drawings may be referred to. The additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the currently described embodiments and/or examples, and the best mode of these inventions currently understood.

FIG. 1 is a three-dimensional schematic diagram of a camera module provided by an embodiment of the present invention;

2 is a top view of the object side end of the camera module shown in FIG. 1;

Figure 3 is a cross-sectional view taken along line A-A in Figure 2;

4 is a three-dimensional exploded view of the camera module shown in FIG. 1;

5 is a three-dimensional exploded view of the camera module shown in FIG. 1 from another perspective;

FIG. 6 is a three-dimensional exploded view of the first lens unit and the second lens unit shown in FIG. 1;

Figure 7 is a schematic structural diagram of two arrangements of the first piezoelectric actuator and the second pressure actuator, wherein Figure 7a shows that the first piezoelectric actuator and the second piezoelectric actuator are distributed at both ends of the lens barrel, and the A piezoelectric deformation section and a second piezoelectric deformation section overlap. Figure 7b shows that the first piezoelectric actuator and the second piezoelectric actuator are distributed on the same end of the lens barrel, and the first piezoelectric deformation section and the second piezoelectric actuator When the electric deformation part does not overlap;

FIG. 8 is a schematic structural diagram of two arrangements of the first piezoelectric actuator and the second pressure actuator, wherein FIG. 8a shows that the first piezoelectric actuator and the second piezoelectric actuator are distributed at both ends of the lens barrel, and the The case where the first drive rod and the second drive rod are shorter, Figure 8b shows the situation where the first piezoelectric driver and the second piezoelectric driver are distributed at the same end of the lens barrel, and the first drive rod and the second drive rod are longer .

Detailed ways

In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are explained in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation disclosed below.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or a central element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

As shown in FIG. 1, the camera module 10 provided by an embodiment of the present invention can be applied to mobile terminals such as mobile phones and tablet computers.

As shown in FIGS. 1 to 3, the camera module 10 includes a circuit substrate 10a, a photosensitive chip 10b, and a lens assembly 10c. The photosensitive chip 10b is provided on the circuit substrate 10a and is electrically connected to the circuit substrate 10a. The lens assembly 10c is disposed on the circuit substrate 10a, and the photosensitive chip 10b is housed in the lens barrel 100 of the lens assembly 10c, and light can be incident through the lens assembly 10c and transmitted to the photosensitive chip 10b.

The lens assembly 10c includes a lens barrel 100, a first lens unit 200, a second lens unit 300, a first piezoelectric driver 400, a second piezoelectric driver 500, a third lens unit 600, a first displacement detector 700, and a second displacement Detector 800.

The lens barrel 100 includes an object side end 102 and an image side end 104. The first lens unit 200 and the second lens unit 300 are both contained in the lens barrel 100, and the first lens unit 200 and the second lens unit 300 are arranged in sequence from the object side end 102 to the image side end 104. It can be understood that the first lens unit 200 and the second lens unit 300 are arranged on the optical axis 20 of the lens assembly 10c.

The first piezoelectric actuator 400 includes a first piezoelectric deforming part 410 and a first driving rod 420 connected, the first piezoelectric deforming part 410 is disposed at the object side end 102 of the lens barrel 100, the first driving rod 420 and the lens assembly 10a The optical axis 20 is arranged in parallel and connected to the first lens unit 200. When a voltage is applied to the first piezoelectric deformation portion 410, the first piezoelectric deformation portion 410 vibrates due to deformation, thereby driving the first driving rod 420 and the first lens unit 200 to move back and forth in a direction parallel to the optical axis 20. In some embodiments, the first piezoelectric deformation portion 410 is electrically connected to the circuit substrate 10a.

The second piezoelectric driver 500 includes a second piezoelectric deforming part 510 and a second driving rod 520 connected to each other. The second piezoelectric deforming part 520 is disposed at the image side end 104 of the lens barrel 100. The second driving rod 520 and the lens assembly 10c The optical axis 20 is arranged in parallel and connected to the second lens unit 300. When a voltage is applied to the second piezoelectric deformation portion 510, the second piezoelectric deformation portion 510 vibrates due to deformation, thereby driving the second driving rod 520 and the second lens unit 300 to move back and forth in a direction parallel to the optical axis 20. In some embodiments, the second piezoelectric deformation portion 510 is electrically connected to the circuit substrate 10a.

In the above-mentioned lens assembly 10c, the first piezoelectric driver 400 is used to control the first lens unit 200 to move back and forth in a direction parallel to the optical axis 20, and the second piezoelectric driver 500 is used to control the second lens unit 300 in contact with the optical axis. The shaft 20 moves back and forth in a parallel direction, thereby realizing mutual movement of the lens units in the lens barrel 100, thereby realizing optical zooming. The first piezoelectric driver 400 and the second piezoelectric driver 500 correspond to the first lens unit 200 and the second lens unit 300 respectively, that is, a single piezoelectric driver controls a single lens unit, so that the first lens unit 200 and the second lens unit 300 Both can be moved individually. Moreover, in the above-mentioned lens assembly 10c, the first piezoelectric deforming part 410 is provided at the object side end 102 of the lens barrel 100, and the second piezoelectric deforming part 520 is provided at the image side end 104 of the lens barrel 100, that is, the first piezoelectric The driver 400 and the second piezoelectric driver 500 are distributed at the two ends of the lens barrel 100, which can effectively reduce the size of the lens assembly 10c and reduce the stroke requirement of the piezoelectric driver.

As shown in FIG. 7, in FIG. 7a, the first piezoelectric actuator 400 and the second piezoelectric actuator 500 are distributed at both ends of the lens barrel 100. In FIG. 7b, the first piezoelectric actuator 400 and the second piezoelectric actuator 500 are distributed at the same end of the lens barrel 100. In FIG. 7a, the orthographic projections of the first piezoelectric deformation portion 410 and the second piezoelectric deformation portion 510 on the same plane overlap, and in FIG. 7b, the first piezoelectric deformation portion 410 and the second piezoelectric deformation portion 510 The orthographic projections on the same plane do not overlap.

When corresponding to the product, as shown in FIG. 3, the orthographic projections of the third lens unit 600 and the second piezoelectric deforming part 510 on the same plane overlap, and when the first piezoelectric deforming part 410, the third lens unit 600 and the When the two piezoelectric deforming parts 510 are at the same end, the orthographic projections of the first piezoelectric deforming part 410, the third lens unit 600, and the second piezoelectric deforming part 510 on the same plane usually cannot overlap, resulting in the lens assembly 10c The size in the lateral direction shown in FIG. 3 is larger.

That is, relative to the first piezoelectric driver 400 and the second piezoelectric driver 500 distributed on the same end of the lens barrel 100, the first piezoelectric driver 400 and the second piezoelectric driver 500 are distributed on both ends of the lens barrel 100, which can effectively Reduce the size of the lens assembly 10c.

As shown in FIG. 8, in FIG. 8a, the first piezoelectric driver 400 and the second piezoelectric driver 500 are distributed at both ends of the lens barrel 100. In FIG. 8b, the first piezoelectric driver 400 and the second piezoelectric driver 500 are distributed at the same end of the lens barrel 100.

In Figure 8b, the stroke of the first lens unit 200 is L1, the length of the corresponding driving rod (420 or 520) is L1, the stroke of the second lens unit 300 is L2, and the length of the corresponding driving rod (420 or 520) is L2 In order to meet the requirements of multi-lens unit optical imaging, the first lens unit 200 and the second lens unit 300 need to be separated by a certain distance to meet a certain position difference. The length of the corresponding drive rod (420 or 520) is L3, so, The length of the driving rod (420 or 520) needs to be greater than or equal to the sum of L1, L2, and L3, that is, the stroke of the piezoelectric driver (400 or 500) needs to be greater than or equal to the sum of L1, L2, and L3. In FIG. 8a, the stroke of the first piezoelectric actuator 400 may be greater than or equal to L1, and the stroke of the second piezoelectric actuator 500 may be greater than or equal to L2.

For example, when the stroke required by the first lens unit 200 is 5.2 mm, the stroke required by the second lens unit 300 is 7.2 mm, and the position difference between the first lens unit 200 and the second lens unit 300 is 7 mm, as shown in FIG. 8b Structure, the stroke of the piezoelectric actuator (400 or 500) needs to be greater than or equal to 5.2+7.2+7 (19.4mm). For the structure shown in Figure 8a, the stroke of the first piezoelectric actuator 400 is greater than or equal to 5.2. The stroke of the driver 500 may be greater than or equal to 7.2.

That is, compared to the first piezoelectric driver 400 and the second piezoelectric driver 500 distributed at the same end of the lens barrel 100, the first piezoelectric driver 400 and the second piezoelectric driver 500 are distributed at both ends of the lens barrel 100, which can reduce The stroke requirements of the piezoelectric actuator.

In some embodiments, the strokes of the first piezoelectric driver 400 and the second piezoelectric driver 500 are the same. At this time, the stroke of the piezoelectric driver (400 or 500) is greater than or equal to the larger of the stroke of the first lens unit 200 and the stroke of the second lens unit 300. For example, the stroke of a piezoelectric actuator (400 or 500) is 10mm. At this time, the orthographic projections of the first driving rod 420 and the second driving rod 520 on the same plane can usually overlap.

In some embodiments, as shown in FIG. 7a, the orthographic projections of the first driving rod 420 and the second driving rod 520 on the same plane overlap, where the overlap length is C. In this way, the utilization rate of the first driving rod 420 and the second driving rod 520 can be increased, and the first lens unit 200 and the second lens unit 300 can each take the required stroke section, which can be achieved without increasing the overall height of the lens assembly 10c. Down, the first lens unit 200 and the second lens unit 2300 have a larger stroke.

In some embodiments, the first lens unit 200 is used to achieve zooming (the focal length changes), and the first piezoelectric driver 400 drives the first lens unit 200 to move back and forth in a direction parallel to the optical axis 20 to achieve zooming. The unit 300 is used to achieve focusing (the focal length is unchanged, the focusing changes the light path, and the focus is concentrated on the surface of the photosensitive chip 10b, and the image is clear), and the second piezoelectric driver 500 drives the second lens unit 300 in a direction parallel to the optical axis 20 Move back and forth to achieve focus. In this way, the aforementioned lens assembly 10c has both zoom and focus functions. In some embodiments, the third lens unit 600 is fixed on the object side end 102 of the lens barrel 100. Wherein, the third lens unit 600 is arranged on the optical axis 20 of the lens assembly 10c. The third lens unit 600 is fixedly connected to the lens barrel 100, and the first lens unit 200 and the second lens unit 300 can move in the lens barrel 100, and the combination of movement and static can make the lens assembly 10c have better optical effects and be smaller size of.

In some embodiments, the first displacement detector 700 is used to detect the displacement of the first lens unit 200, and the second displacement detector 800 is used to detect the displacement of the second lens unit 300.

The structure of the lens assembly 10c will be described in detail below.

In some embodiments, as shown in FIGS. 3 to 5, the lens barrel 100 includes a barrel 110, an object side plate 120 and an image side plate 130. The barrel 110 is a hollow structure with open ends. The object side plate 120 is provided at one open end of the barrel 110, and the image side plate 130 is provided at the other open end of the barrel 110. The object side plate 120 is provided with a light entrance hole 122, and the image side plate 130 is provided with a light exit hole 132. The photosensitive chip 10b and the light exit hole 132 are arranged directly opposite.

In some embodiments, the first piezoelectric deformation portion 410 is located outside the barrel 110 and is disposed on the object side plate 120, and the first driving rod 420 penetrates through the object side plate 120. The second piezoelectric deformation portion 510 is located outside the barrel 110 and is arranged on the image side plate 130, and the second driving rod 520 is penetrated on the image side plate 130. In this way, it is facilitated that the first piezoelectric deformation portion 410 and the second piezoelectric deformation portion 510 are electrically connected to an external circuit (for example, the circuit board 10a) from the outside (not inside) of the barrel 110.

In some embodiments, the first piezoelectric driver 400 further includes a first electrical connection plate 430, the first electrical connection plate 430 is provided on the outer peripheral wall of the barrel 110, and one end of the first electrical connection plate 430 is connected to the first piezoelectric deformation The electrical connection part 412 of the part 410 is electrically connected, and the other end is electrically connected to the circuit board 10a. The second piezoelectric driver 500 further includes a second electrical connection plate 530. The second electrical connection plate 530 is provided on the outer peripheral wall of the barrel 110. One end of the second electrical connection plate 530 is electrically connected to the second piezoelectric deformation portion 510. 512 is electrically connected, and is electrically connected to the circuit board 10a through the electrical connection portion 512 of the second piezoelectric deformation portion 510. In this way, both the first piezoelectric deformation portion 410 and the second piezoelectric deformation portion 510 can be powered through the circuit substrate 10a.

In some embodiments, the first displacement detector 700 includes a first light reflecting member 710 and a first light emitting and receiving member 720, the first light reflecting member 710 is disposed on the first lens unit 200, and the first light emitting and receiving member 720 It is arranged on the second electrical connection board 530 and is electrically connected to the second electrical connection board 530. The outer peripheral wall of the barrel 110 is provided with a first light through hole 112 corresponding to the first light emitting and receiving member 720. The light emitted by the first light emitting and receiving member 720 reaches the first light reflecting member 710 through the first light through hole 112, and after being reflected by the first light reflecting member 710, passes through the first light through hole 112 again and is emitted by the first light. The receiving part 720 receives.

The second displacement detector 800 includes a second light reflecting member 810 and a second light emitting and receiving member 820. The second light reflecting member 810 is disposed on the second lens unit 300, and the second light emitting and receiving member 820 is disposed on the first electrical connection. The board 430 is electrically connected to the first electrical connection board 430. A second light through hole 114 corresponding to the second light emitting and receiving part 820 is opened on the outer peripheral wall of the barrel 110. The light emitted by the second light emitting and receiving member 820 reaches the second light reflecting member 810 through the second light through hole 114, and after being reflected by the second light reflecting member 810, passes through the second light through hole 114 again and is emitted by the second light. The receiver 820 receives it.

In some embodiments, an assembly port 116 is opened on the outer peripheral wall of the barrel 110. The lens barrel 100 further includes a cover plate 140, the cover plate 140 is detachably connected to the barrel 110 and seals the assembly port 116. The assembling port 116 is very convenient to disassemble and assemble the first lens unit 200 and the second lens unit 300 in the barrel 110. In some embodiments, two opposite sides of the cover plate 140 are respectively provided with lugs 142, the lugs 142 are provided with locking grooves 1422, and the outer peripheral wall of the barrel 110 and the lugs 142 is provided with a locking block 118, The clamping block 118 is clamped in the clamping slot 1422 to clamp the cover plate 140 to the barrel 110.

In some embodiments, the outer peripheral wall of the barrel 110 includes a plurality of side plates connected end to end, and the first electrical connection plate 430, the assembly port 116, and the second electrical connection plate 530 are sequentially arranged on three side plates that are connected in sequence. The two lugs 142 of the cover plate 140 respectively correspond to the side plates provided with the first electrical connection plate 430 and the second electrical connection plate 530, and the side plates provided with the first electrical connection plate 430 and the second electrical connection plate 530 simultaneously A card block 118 is provided. When assembling, first place the first lens unit 200 and the second lens unit 300 in the barrel 110, and then assemble the first electrical connection plate 430 and the second electrical connection plate 530 on the outer peripheral wall of the barrel 110, and then The first piezoelectric deformation portion 410 is assembled on the object side plate 120 and the second piezoelectric deformation portion 510 is assembled on the image side plate 130. Finally, the cover plate 140 is assembled, and the two lugs 142 are respectively located outside the first electrical connection plate 430 and the second electrical connection plate 530).

In some embodiments, the first piezoelectric deformation portion 410 has a plate shape and is vertically connected to the first driving rod 420. The second piezoelectric deformation portion 510 has a plate shape and is vertically connected to the second driving rod 520. In this way, the first driving rod 420 and the second driving rod 520 can have a relatively large displacement in the direction parallel to the optical axis 20. When the forward current is applied, the piezoelectric element (the first piezoelectric deformation portion 410 or the second piezoelectric deformation portion 510) deforms in the direction of the driving rod (the first driving rod 420 or the second driving rod 520), and pushing the driving rod to move; When the reverse current is applied, the piezoelectric element deforms in the reverse direction along the driving rod, and pulls back the driving rod to move.

In some embodiments, the first driving rod 420 and the second driving rod 520 are arranged at intervals along a direction perpendicular to the optical axis 20, that is, the first driving rod 420, the optical axis 20, and the second driving rod 520 are along the same straight line. Arranged in an interval. In this way, the size of the aforementioned lens assembly 10c can be further reduced.

In some embodiments, as shown in FIGS. 2 and 3, the barrel 110 is a rectangular parallelepiped, and the height and width of the barrel 110 are greater than the length of the barrel 110. The height direction of the barrel 110 corresponds to the optical axis 20. The driving rod 420 and the second driving rod 520 are arranged along the width direction of the barrel 110. Taking the viewing angle shown in FIG. 3 as an example, that is, the first driving rod 420 and the second driving rod 520 are located on the left and right sides of the barrel 110.

In some embodiments, as shown in FIG. 6, the first lens unit 200 includes a first optical portion 210 for passing light, a first connection portion 220 provided on the outer periphery of the first optical portion 210, and a The first elastic structure 230 on the portion 220. The first elastic structure 230 has a first mounting hole 230a, and the first driving rod 420 penetrates the first mounting hole 230a in the direction of the optical axis 20, and is fixed in abutment with the inner wall of the first mounting hole 230a.

The second lens unit 300 includes a second optical portion 310 for passing light, a second connecting portion 320 provided on the outer periphery of the second optical portion 310 and a second elastic structure 330 provided on the second connecting portion 320. The second elastic structure 330 has a second mounting hole 330a, and the second driving rod 520 penetrates the second mounting hole 330a in the direction of the optical axis 20, and abuts and fixes the inner wall of the second mounting hole 330a.

Compared with the rigid connection, the first lens unit 200 and the first driving rod 420 are elastically connected by the first elastic structure 230, and the second lens unit 300 and the second driving rod 520 are elastically connected by the second elastic structure 330, so that the first The movement precision of the first lens unit 200 and the second lens unit 300 is higher.

In some embodiments, the outer peripheral wall of the first connecting portion 220 is provided with a first V-shaped groove 220a. The first elastic structure 230 includes a first V-shaped elastic block 232 and a first U-shaped elastic block 234. The first U-shaped elastic block 234 includes a first bottom plate 2342 and two first side plates 2344. The first side plate 2344 is provided with The first card slot 2346. The first V-shaped elastic block 232 is disposed in the first V-shaped groove 220a. One end of the first connecting portion 220 with the first V-shaped groove 220a is located in the first U-shaped elastic block 234, and the side of the first connecting portion 220 corresponding to the first side plate 2344 of the first U-shaped elastic block 234 is provided with a A clamping block 222, the first clamping block 222 is clamped in the first clamping slot 2346 and forms a first mounting hole 230a. The above-mentioned structural design is very convenient to disassemble and assemble the first lens unit 200 and the first driving rod 420.

A second V-shaped groove 320a is opened on the outer peripheral wall of the second connecting portion 320. The second elastic structure 330 includes a second V-shaped elastic block 332 and a second U-shaped elastic block 334. The second U-shaped elastic block 334 includes a second bottom plate 3342 and two second side plates 3344. The second side plate 3344 is provided with The second card slot 3346. The second V-shaped elastic block 332 is disposed in the second V-shaped groove 320a. One end of the second connecting portion 320 with the second V-shaped groove 320a is located in the second U-shaped elastic block 334, and the second connecting portion 320 is provided with a second side plate 3344 on the side corresponding to the second side plate 3344 of the second U-shaped elastic block 334. Two clamping blocks 322, the second clamping block 322 is clamped in the second clamping slot 3346, and forms a second mounting hole 330a. The above structural design is very convenient to disassemble and assemble the second lens unit 300 and the second driving rod 520.

In some embodiments, the first connecting portion 220 includes a first cylinder 224, a first support rod 226 and a second support rod 228 disposed in the circumferential direction of the first cylinder 224, and a second support rod 228 disposed far away from The first mounting plate 229 extends toward the image side end 104 at one end of the first cylinder 224. In the direction of the optical axis 20, the second support rod 228 is closer to the object side end 102 relative to the first support rod 226. The first optical part 210 includes at least one lens 212 arranged in the first cylinder 224. The first elastic structure 230 is disposed at an end of the first support rod 226 away from the first cylinder 224, and the first light reflecting member 710 is disposed on the first mounting plate 229. The above structural design can make reasonable use of the inner space of the barrel 110 to obtain a lens assembly 10c with a smaller size.

The second connecting portion 320 includes a second cylinder 324, a third support rod 326 and a fourth support rod 328 provided in the circumferential direction of the second cylinder 324, and a fourth support rod 328 away from the second cylinder 324 A second mounting plate 329 extending toward the object-side end 102 at one end. In the direction of the optical axis 20, the fourth support rod 328 is closer to the object side end 102 relative to the third support rod 326, and the fourth support rod 328 corresponds to the second support rod 228, and the third support rod 326 and the first support rod 226 corresponds. The second optical part 310 includes at least one lens 312 arranged in the second cylinder 324. The second elastic structure 330 is disposed on an end of the fourth support rod 328 away from the second cylinder 324, and the second light reflecting member 810 is disposed on the second mounting plate 329. The above structural design can make reasonable use of the internal space of the barrel 110 to obtain a lens assembly 10c with a smaller size.

In some embodiments, as shown in FIG. 3, the first driving rod 420 sequentially passes through the first supporting rod 226 of the first connecting portion 220 and the third supporting rod 326 of the second connecting portion 320, and the first driving rod 410 and The first connecting portion 220 is fixedly connected and slidingly fitted with the second connecting portion 320. That is, the first driving rod 420 can only drive the first lens unit 200 to move, but cannot drive the second lens unit 300 to move.

The second driving rod 520 sequentially passes through the fourth supporting rod 328 of the second connecting part 320 and the second supporting rod 228 of the first connecting part 320. The second driving rod 520 is fixedly connected to the second connecting part 320 and is connected to the first The connecting portion 220 is slidingly fitted. That is, the second driving rod 520 can only drive the second lens unit 300 to move, but cannot drive the first lens unit 200 to move.

The first driving rod 420 passes through the first connecting part 220 and the second connecting part 320 at the same time, and the second driving rod 520 passes through the first connecting part 220 and the second connecting part 320 at the same time, that is, the first driving rod 420 and the second connecting part 320. The orthographic projections of the driving rods 520 on the same plane overlap, so that the utilization ratio of the first driving rod 420 and the second driving rod 520 can be improved, and the first lens unit 200 and the second lens unit 300 each take the required stroke section.

In some embodiments, as shown in FIGS. 4 and 5, the lens assembly 10 c further includes a first guide rod 910, a first elastic member 920, a second guide rod 930, and a second elastic member 940. One end of the first guide rod 910 is fixed to the object side end 102, and the other end passes through the first elastic member 920, the second support rod 228 of the first connecting portion 220, and the fourth support rod 328 of the second connecting portion 320 in sequence, and A guide rod 910 is slidably connected to both the first connecting portion 220 and the second connecting portion 320. One end of the second guide rod 930 is fixed to the image side end 104, and the other end passes through the second elastic member 940, the third support rod 326 of the second connecting portion 320, and the first support rod 226 of the first connecting portion 220 in sequence, and The two guide rods 920 are slidably connected to the first connecting portion 220 and the second connecting portion 320. The first guide rod 910 and the second drive rod 520 are located on the same side of the optical axis 20, and the second guide rod 930 and the first drive rod 420 are located on the same side of the optical axis 20.

The provision of the first guide rod 910 and the second driving rod 520 can prevent the first lens unit 200 and the second lens unit 300 from rotating during the movement. The provision of the first elastic member 920 and the second elastic member 940 can buffer and support the first lens unit 200 and the second lens unit 300.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several embodiments of the present invention, and the descriptions are more specific and detailed, but they should not be understood as limiting the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A lens assembly including:

The lens barrel, including the object side and the image side;

The first lens unit is housed in the lens barrel;

The second lens unit is accommodated in the lens barrel, and the first lens unit and the second lens unit are arranged in order from the object side end to the image side end;

The first piezoelectric actuator includes a first piezoelectric deformable portion and a first drive rod connected, the first piezoelectric deformable portion is provided at the object side end of the lens barrel, and the first drive rod is connected to the The optical axis of the lens assembly is arranged in parallel and connected to the first lens unit. When a voltage is applied to the first piezoelectric deformable portion, the first piezoelectric deformable portion vibrates due to deformation, thereby driving the The first driving rod and the first lens unit move back and forth in a direction parallel to the optical axis; and

The second piezoelectric actuator includes a connected second piezoelectric deforming part and a second driving rod. The second piezoelectric deforming part is provided on the image side end of the lens barrel, and the second driving rod is connected to the second driving rod. The optical axis of the lens assembly is arranged in parallel and connected to the second lens unit. When a voltage is applied to the second piezoelectric deforming part, the second piezoelectric deforming part vibrates due to deformation, thereby driving the The second driving rod and the second lens unit move back and forth in a direction parallel to the optical axis.
4. The lens assembly of claim 1, wherein the first driving rod, the optical axis, and the second driving rod are arranged along the same straight line at an interval.
The lens assembly according to claim 1, wherein the first lens unit includes a first optical portion for light to pass through and a first connecting portion provided on an outer periphery of the first optical portion, and the first optical portion The two lens units include a second optical part for light to pass through and a second connecting part arranged on the outer periphery of the second optical part;

The first driving rod passes through the first connecting part and the second connecting part in sequence, wherein the first driving rod is fixedly connected to the first connecting part and slides with the second connecting part Cooperate

The second driving rod passes through the second connecting part and the first connecting part in sequence, wherein the second driving rod is fixedly connected to the second connecting part and slides with the first connecting part Cooperate.
The lens assembly according to claim 3, wherein the lens assembly further comprises a first guide rod and a second guide rod, one end of the first guide rod is fixed to the object side end, and the other end passes through in turn The first connecting portion and the second connecting portion, and the first guide rod is in sliding fit with the first connecting portion and the second connecting portion, and one end of the second guide rod is fixed to the The image side end and the other end pass through the second connecting portion and the first connecting portion in sequence, and the second guide rod is slidingly fitted with the first connecting portion and the second connecting portion, wherein, The first guide rod and the second drive rod are located on the same side of the optical axis, and the second guide rod and the first drive rod are located on the same side of the optical axis.
The lens assembly of claim 4, wherein the lens assembly further comprises a first elastic member, the first elastic member penetrates the first guide rod and is located at the first connecting portion The side close to the side end of the object; and/or

The lens assembly further includes a second elastic member, the second elastic member penetrates the second guide rod and is located on a side of the second connecting portion close to the image side end.
The lens assembly according to claim 4, wherein the first connecting portion comprises a first cylinder, and a first rod and a second rod provided in the circumferential direction of the first cylinder, the The first optical part includes at least one lens set in the first cylinder;

The second connecting portion includes a second cylinder and a third pole and a fourth pole provided in the circumferential direction of the second cylinder, and the fourth pole is directly opposite to the second pole , The third pole is directly opposite to the first pole, and the second optical portion includes at least one lens set in the second cylinder;

The first drive rod is fixedly connected to the first support rod and is slidingly fitted with the third support rod, and the second guide rod is slidingly fitted with the first support rod and the third support rod , The second drive rod is fixedly connected to the fourth support rod and is slidably fitted with the second support rod, and the first guide rod, the second support rod and the fourth support rod all slide Cooperate.
The lens assembly according to claim 6, wherein the lens assembly further comprises a first displacement detector for detecting the displacement of the first lens unit, and the first displacement detector comprises a second A light reflecting part and a first light emitting and receiving part, the first light reflecting part is arranged on the second pole, and the first light emitting and receiving part is located in the lens barrel and is arranged on the mirror On the inner wall of the tube;

The lens assembly further includes a second displacement detector for detecting the displacement of the second lens unit, and the second displacement detector includes a second light reflecting part and a second light emitting and receiving part that are used in conjunction with each other. The second light reflecting member is arranged on the third pole, and the second light emitting and receiving member is located in the lens barrel and is arranged on the inner wall of the lens barrel.
The lens assembly according to claim 7, wherein the first connecting portion further comprises a first connecting portion disposed at an end of the second supporting rod away from the first cylinder and extending toward the image side end A mounting plate, the first light reflecting member is arranged on the first mounting plate, the second connecting portion further includes an end of the third pole far away from the first cylinder and facing the A second mounting board extending from the side end of the object, and the second light reflecting member is provided on the second mounting board;

Wherein, on the optical axis, the second support rod is closer to the object side end relative to the first support rod, and the fourth support rod is closer to the object relative to the third support rod. Side end.
7. The lens assembly of claim 6, wherein the first lens unit further comprises a first elastic structure provided on the first support rod, the first elastic structure having a first mounting hole, and The first driving rod penetrates the first mounting hole in the direction of the optical axis, and abuts and fixes the inner wall of the first mounting hole.
The lens assembly according to claim 9, wherein a first V-shaped groove is formed on an end surface of the first support rod away from the first cylinder, and the first elastic structure includes a first V-shaped elastic Block and a first U-shaped elastic block, the first U-shaped elastic block includes a first bottom plate and two first side plates, the first side plate is provided with a first card slot, the first V-shaped elastic block Is located in the first V-shaped groove, one end of the first supporting rod having the first V-shaped groove is located in the first U-shaped elastic block, and the first supporting rod and the first U A first clamping block is provided on a side surface corresponding to the first side plate of the elastic block, and the first clamping block is clamped in the first clamping slot and forms the first mounting hole.
7. The lens assembly of claim 6, wherein the second lens unit further comprises a second elastic structure provided on the fourth support rod, the second elastic structure having a second mounting hole, and The second driving rod penetrates the second mounting hole in the direction of the optical axis, and abuts and fixes the inner wall of the second mounting hole.
The lens assembly according to claim 11, wherein a second V-shaped groove is formed on the end surface of the fourth support rod away from the second cylinder, and the second elastic structure includes a second V-shaped elastic Block and a second U-shaped elastic block, the second U-shaped elastic block includes a second bottom plate and two second side plates, the second side plate is provided with a second slot, the second V-shaped elastic block Is located in the second V-shaped groove, one end of the fourth supporting rod having the second V-shaped groove is located in the second U-shaped elastic block, and the fourth supporting rod and the second U A second locking block is provided on a side surface corresponding to the second side plate of the elastic block, and the second locking block is locked in the second slot and forms the second mounting hole.
The lens assembly according to any one of claims 1-12, wherein the first piezoelectric deformable portion is in the shape of a plate and is connected perpendicularly to the first driving rod; the second piezoelectric deformable The part is in the shape of a plate and is vertically connected with the second driving rod.
The lens assembly according to claim 13, wherein the lens barrel comprises a barrel body, an object side plate, and an image side plate, the barrel body is a hollow structure with open ends, and the object side plate is disposed at the One open end of the barrel body, the image side plate is provided at the other open end of the barrel body, the object side plate is provided with a light entrance hole, and the image side plate is provided with a light exit hole;

The first piezoelectric deformable portion is located outside the barrel and is arranged on the object side plate, the first driving rod is penetrated through the object side plate; the second piezoelectric deformable portion Located outside the barrel and arranged on the image side plate, and the second driving rod penetrates through the image side plate;

The lens assembly further includes a third lens unit, the third lens unit is arranged in the light entrance hole and closes the light entrance hole.
The lens assembly according to claim 14, wherein an assembly port is opened on the outer peripheral wall of the barrel, the lens barrel further includes a cover plate, and the cover plate is detachably connected to the barrel body, and The assembly port is closed.
The lens assembly of claim 14, wherein the lens assembly further comprises a first electrical connection plate, a second electrical connection plate, a first displacement detector, and a second displacement detector, the first displacement detector The device is used to detect the displacement of the first lens unit, the second displacement detector is used to detect the displacement of the second lens unit, the first electrical connection plate is provided on the outer peripheral wall of the barrel and is connected to The first piezoelectric deformation portion is electrically connected, the second displacement detector is provided on the first electrical connection plate and is electrically connected to the first electrical connection plate, and the second electrical connection plate is provided on the On the outer peripheral wall of the barrel and electrically connected to the second piezoelectric deformation portion, the first displacement detector is provided on the second electrical connection plate and is electrically connected to the second electrical connection plate, Both the first electrical connection board and the second electrical connection board can be electrically connected to a circuit substrate located at the image side end and used for carrying a photosensitive chip.
4. The lens assembly of claim 1, wherein the lens assembly further comprises a first displacement detector, and the first displacement detector is used to detect the displacement of the first lens unit.
The lens assembly according to claim 17, wherein the first displacement detector comprises a first light reflecting part and a first light emitting and receiving part that cooperate with each other, and the first light reflecting part is arranged on the first light reflecting part. On a lens unit, the first light emitting and receiving element is located in the lens barrel and arranged on the inner wall of the lens barrel.
The lens assembly according to claim 1, wherein the lens assembly further comprises a second displacement detector, and the second displacement detector is used to detect the displacement of the second lens unit.
The lens assembly according to claim 19, wherein the first displacement detector comprises a first light reflecting part and a first light emitting and receiving part that cooperate with each other, and the first light reflecting part is arranged on the first light reflecting part. On the second lens unit, the first light emitting and receiving element is located in the lens barrel and arranged on the inner wall of the lens barrel.
A camera module includes:

The lens assembly according to any one of claims 1-20;

A circuit board is provided on the image side end of the lens barrel and is electrically connected to the first piezoelectric deformable portion and the second piezoelectric deformable portion; and

The photosensitive chip is arranged on the circuit substrate, is electrically connected to the circuit substrate, and is located in the lens barrel.
A mobile terminal comprising the camera module according to claim 21.