Camera module and electronic device

Abstract

The application discloses a camera module and electronic equipment, and relates to the technical field of electronic products. The camera module comprises a lens assembly, a supporting seat, an image acquisition assembly, a piezoelectric vibrator and a first circuit board, and the image acquisition assembly and the piezoelectric vibrator are electrically connected with the first circuit board; the lens assembly, the supporting seat and the image acquisition assembly are sequentially stacked, the supporting seat is embedded in a containing groove, a first through hole is formed in the bottom of the containing groove, the light exit surface of the lens assembly and the light entrance surface of the image acquisition assembly are opposite to the first through hole respectively, and the lens assembly is in sliding connection with the supporting seat; the lens assembly comprises a bearing part, the first end of the piezoelectric vibrator is fixedly connected with the supporting seat, and the second end of the piezoelectric vibrator is in abutment with the bearing part; wherein, in the case that the piezoelectric vibrator is in an electrified state, the second end of the piezoelectric vibrator drives the lens assembly to move towards or away from the image acquisition assembly through the friction force between the second end and the bearing part.

Description

Technical Field

[0001] This application relates to the field of electronic product technology, specifically to a camera module and electronic device. Background Technology

[0002] In related technologies, the camera module used in electronic devices mainly includes a bracket, a lens, an image sensor, and a motor. The lens and the motor are respectively mounted on the bracket, and the motor is mounted on the side of the lens and connected to the lens. The motor drives the lens to move, so as to adjust the relative position between the lens and the image sensor, thereby achieving the focusing purpose of the lens.

[0003] In the aforementioned camera module, the motor has a relatively large size, and as the pixel count of the camera continues to increase, the weight of the lens will also increase. In order to provide sufficient driving force, the size of the motor will also increase further, resulting in the camera module occupying a large space in the electronic device, which is not conducive to the miniaturization design of the electronic device. Summary of the Invention

[0004] This application provides a camera module and an electronic device, which helps to reduce the space required for the driving structure in the camera module, thereby facilitating the miniaturization design of the electronic device.

[0005] In a first aspect, this application provides a camera module, including a lens assembly, a support base, an image acquisition assembly, a piezoelectric vibrator, and a first circuit board, wherein the image acquisition assembly and the piezoelectric vibrator are respectively electrically connected to the first circuit board;

[0006] The lens assembly, the support base, and the image acquisition assembly are stacked sequentially. The support base includes a receiving groove, and the support base is embedded in the receiving groove. A first through hole is opened at the bottom of the receiving groove. The light-emitting surface of the lens assembly and the light-incident surface of the image acquisition assembly are respectively opposite to the first through hole. The lens assembly is slidably connected to the support base.

[0007] The lens assembly includes a support portion, a first end of the piezoelectric vibrator is fixedly connected to the support base, and a second end of the piezoelectric vibrator abuts against the support portion;

[0008] When the piezoelectric vibrator is energized, the second end of the piezoelectric vibrator drives the lens assembly to move toward or away from the image acquisition assembly through friction between it and the bearing portion.

[0009] Secondly, this application provides an electronic device including the camera module described in the first aspect.

[0010] In this embodiment, a piezoelectric vibrator is used as the driving structure in the camera module to drive the lens assembly and realize the focusing process of the camera module. Since the piezoelectric vibrator has the characteristics of small size and large torque, the use of this driving structure is beneficial to reduce the space required for the driving structure in the camera module, thereby facilitating the miniaturization design of electronic devices. Attached Figure Description

[0011] Figure 1 This is an exploded view of the camera module provided in the embodiments of this application;

[0012] Figure 2 yes Figure 1 The image shows a top view of the assembled camera module.

[0013] Figure 3 yes Figure 2 A sectional view of section AA in the image;

[0014] Figure 4 This is one of the schematic diagrams illustrating the assembly process of the camera module in this application embodiment;

[0015] Figure 5 This is the second schematic diagram of the camera module assembly process in the embodiments of this application;

[0016] Figure 6 This is the third schematic diagram of the camera module assembly process in the embodiments of this application;

[0017] Figure 7 This is the fourth schematic diagram of the camera module assembly process in the embodiments of this application;

[0018] Figure 8 This is the fifth schematic diagram of the camera module assembly process in the embodiments of this application;

[0019] Figure 9 This is the sixth schematic diagram of the camera module assembly process in the embodiments of this application;

[0020] Figure 10 This is the seventh schematic diagram of the camera module assembly process in the embodiments of this application;

[0021] Figure 11 This is the eighth schematic diagram of the camera module assembly process in the embodiments of this application;

[0022] Figure 12 This is the ninth schematic diagram of the camera module assembly process in the embodiments of this application;

[0023] Figure 13 This is the tenth schematic diagram of the camera module assembly process in the embodiments of this application;

[0024] Figure 14 This is eleventh of the schematic diagrams illustrating the assembly process of the camera module in the embodiments of this application;

[0025] Figure 15 This is the twelfth schematic diagram of the camera module assembly process in the embodiments of this application;

[0026] Figure 16 This is thirteenth of the schematic diagrams illustrating the assembly process of the camera module in the embodiments of this application;

[0027] Figure 17 This is the fourteenth schematic diagram of the camera module assembly process in the embodiments of this application;

[0028] Figure 18 This is 15th of the schematic diagrams illustrating the assembly process of the camera module in the embodiments of this application;

[0029] Figure 19 This is a schematic diagram of the structure of a camera module provided in another embodiment of this application;

[0030] Figure 20 yes Figure 19 A sectional view of section BB in the image;

[0031] Figure 21 yes Figure 19 Side view of the camera module in the illustrated embodiment;

[0032] Figure 22 yes Figure 21 A sectional view of section C in the image;

[0033] Figure 23 This is a schematic diagram of the structure of a piezoelectric vibrator;

[0034] Figure 24 This is a schematic diagram of the region division of the first piezoelectric ceramic layer or the second piezoelectric ceramic layer in the embodiments of this application;

[0035] Figure 25 This is a schematic diagram of the frequency response curve of a piezoelectric vibrator;

[0036] Figure 26 These are modal contour maps of the first and second operating modes of the piezoelectric oscillator.

[0037] Figure 27 This is a schematic diagram of the motion trajectory of the friction head of a piezoelectric vibrator;

[0038] Figure 28 This is a schematic diagram of the voltage applied to the piezoelectric vibrator in some embodiments of this application;

[0039] Figure 29This is a schematic diagram of the connection between the piezoelectric vibrator and the carrier plate. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0041] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] The following description, in conjunction with the accompanying drawings, details a camera module and electronic device provided in this application through specific embodiments and application scenarios.

[0043] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a camera module provided in an embodiment of this application. The camera module includes a lens assembly 100, a support base 200, an image acquisition assembly 300, a piezoelectric vibrator 400, and a first circuit board 500. The image acquisition assembly 300 and the piezoelectric vibrator 400 are electrically connected to the first circuit board 500, respectively.

[0044] The lens assembly 100, the support base 200, and the image acquisition component 300 are stacked sequentially. The support base 200 includes a receiving groove 210, and the support base 200 is embedded in the receiving groove 210. A first through hole 220 is opened at the bottom of the receiving groove 210. The light-emitting surface of the lens assembly 100 and the light-incident surface of the image acquisition component 300 are respectively opposite to the first through hole 220. The lens assembly 100 and the support base 200 are slidably connected.

[0045] The lens assembly 100 includes a support portion, the first end 450 of the piezoelectric vibrator 400 is fixedly connected to the support base 200, and the second end 460 of the piezoelectric vibrator 400 abuts against the support portion;

[0046] When the piezoelectric vibrator 400 is energized, the second end 460 of the piezoelectric vibrator 400 drives the lens assembly 100 to move toward or away from the image acquisition assembly 300 through friction with the support portion.

[0047] Please see Figure 1 In some embodiments of this application, the lens assembly 100 may include a lens body 110 and a lens carrier 120. The lens body 110 may consist of a plurality of lenses and lens holders, and is mainly responsible for focusing light. The lens carrier 120 is used to support the lens body 110.

[0048] Please see Figure 1 In some embodiments of this application, the image acquisition component 300 may include a filter 310, a filter holder 320, and a photosensitive imaging chip 330. The filter holder 320 may be fixedly connected to the end face of the support base 200 facing the image acquisition component 300. The fixed connection between the filter holder 320 and the support base 200 can be any of various methods, such as bonding, screw connection, or threaded connection. The filter 310 may be bonded to the filter holder 320, and the filter 310 is opposite to the first through hole 220. The photosensitive imaging chip 330 may be fixedly mounted in the first circuit board 500 by welding or bonding, and the photosensitive surface of the photosensitive imaging chip 330 may be opposite to the filter 310.

[0049] Specifically, the end face of the lens body 110 facing the first through-hole 220 is the light-emitting surface of the lens assembly 100, and the end face of the filter 310 facing the first through-hole 220 is the light-incident surface of the image acquisition assembly 300. The filter 310 can be used to filter certain wavelengths of light to improve image quality. The filter bracket 320 can be used to support the filter 310 and protect the photosensitive imaging chip 330. The photosensitive imaging chip 330 can be any semiconductor chip that uses the photoelectric conversion effect to record changes in light. The imaging process of the camera module can include: external light enters the lens assembly 100, the light entering the lens assembly 100 can pass through the light-emitting surface of the lens assembly 100, and pass through the first through-hole 220 to enter the filter 310 for filtering, and the light passing through the filter 310 can be incident on the photosensitive surface of the photosensitive imaging chip 330, and the photosensitive imaging chip 330 performs photosensitive imaging to realize the imaging process of the camera module.

[0050] The first circuit board 500 mentioned above can be a circuit board in a camera module for various scenarios. For example, it can be a flexible circuit board. The first circuit board 500 can be used to fix the camera module and connect the camera module to the whole machine.

[0051] The piezoelectric vibrator 400 described above can also be a piezoelectric resonator. Specifically, the piezoelectric vibrator 400 can be a vibrator comprising piezoelectric ceramic. When current is applied to the piezoelectric vibrator 400, it typically vibrates, and the amplitude and direction of the vibration are related to the applied current. Thus, by controlling the current applied to the piezoelectric vibrator 400, the vibration process of the piezoelectric vibrator 400 can be controlled. Furthermore, by controlling the movement of the second end 460 of the piezoelectric vibrator 400 toward or away from the image acquisition component 300, the frictional force between the second end 460 of the piezoelectric vibrator 400 and the supporting part can drive the lens assembly 100 to move toward or away from the image acquisition component 300, thereby achieving the focusing process of the camera module.

[0052] In this embodiment, a piezoelectric vibrator 400 is used as the driving structure in the camera module to drive the lens assembly 100, thereby realizing the focusing process of the camera module. Since the piezoelectric vibrator 400 has the characteristics of small size and high torque, using this driving structure helps to reduce the space required for the driving structure in the camera module, thus facilitating the miniaturization design of electronic devices. Furthermore, in this embodiment, using a piezoelectric vibrator 400 as the driving structure in the camera module does not generate electromagnetic interference compared to using electromagnetic driving methods.

[0053] In related technologies, when the camera module uses an electromagnetically driven motor, the motor has a relatively large range of motion, resulting in noticeable noise when the user shakes the electronic device, thus creating a poor user experience.

[0054] Optionally, the lens assembly 100 includes a lens body 110, a lens carrier 120, a support plate 130, and an elastic element 140. The lens body 110 is fixedly connected to the lens carrier 120. The outer side wall of the lens carrier 120 is provided with a mounting groove 122. The mounting groove 122 includes: a first slot opposite to the inner wall of the support base 200, and a first inner wall 1221 adjacent to the first slot.

[0055] The piezoelectric vibrator 400, the support plate 130, and the elastic element 140 are respectively located in the mounting groove 122, and the elastic element 140 is elastically compressed between the support plate 130 and the first inner wall 1221. The end face of the support plate 130 facing away from the elastic element 140 abuts against the second end 460 of the piezoelectric vibrator 400. The support portion includes the end face of the support plate 130 facing away from the elastic element 140.

[0056] The aforementioned support plate 130 can be fixedly connected to the lens carrier 120. Thus, the friction between the second end 460 of the piezoelectric vibrator 400 and the support plate 130 can drive the support plate 130 and the lens carrier 120 to move synchronously. The support plate 130 can be various metal plates, such as various alloy plates, which helps improve the wear resistance of the support plate 130, thereby increasing the service life of the camera module.

[0057] The aforementioned elastic element 140 can be various elastic elements 140, such as a sheet, spring, or torsion spring.

[0058] Please see Figure 1 and Figure 3 In some embodiments of this application, the mounting groove 122 is a strip-shaped mounting groove 122, and the extending direction of the mounting groove 122 is perpendicular to the moving direction of the lens assembly 100, wherein the moving direction of the lens assembly 100 is the direction of movement toward or away from the image acquisition component 300. The first inner wall 1221 is an inner wall adjacent to the first groove and parallel to the moving direction of the lens assembly 100. The extending direction of the piezoelectric vibrator 400 when not energized can be perpendicular to the moving direction of the lens assembly 100.

[0059] It is understandable that by setting the first slot, the support base 200 can pass through the first slot and be fixedly connected to the first end 450 of the piezoelectric vibrator 400.

[0060] Specifically, the elastic element 140 being elastically compressed between the support plate 130 and the first inner wall 1221 means that the elastic element 140 is in an elastically compressed state, with one end of the elastic element 140 in contact with the support plate 130 and the other end of the elastic element 140 in contact with the first inner wall 1221. Thus, the direction of the elastic force exerted by the elastic element 140 on the support plate 130 is from the support plate 130 to the piezoelectric vibrator 400. This helps to keep the support plate 130 and the second end 460 of the piezoelectric vibrator 400 pressed together at all times.

[0061] In this embodiment, by providing an elastic element 140 in an elastically compressed state between the support plate 130 and the first inner wall 1221, the support plate 130 and the second end 460 of the piezoelectric vibrator 400 can always be kept in a pressed state. Thus, even if the piezoelectric vibrator 400 is de-energized, the camera module can achieve self-locking in the de-energized state because the support plate 130 and the second end 460 of the piezoelectric vibrator 400 are always kept in a pressed state. At the same time, since the piezoelectric vibrator 400, the support plate 130, the elastic element 140 and the first inner wall 1221 are tightly connected in sequence and there is no space for movement between them, the driving structure in the camera module is less likely to produce abnormal noises when the user shakes the electronic device.

[0062] Optionally, the mounting slot 122 further includes a second slot located on the end face of the lens carrier 120 away from the image acquisition component 300;

[0063] The support plate 130 is arranged perpendicular to the plane where the second slot is located, and the end of the support plate 130 away from the second slot is fixedly connected to the inner wall of the mounting groove 122. The elastic element 140 is a V-shaped spring sheet, and the open end of the spring sheet faces the second slot.

[0064] The fact that the support plate 130 is set perpendicular to the plane where the second slot is located can mean that the support plate 130 is set perpendicular to the plane where the second slot is located when the piezoelectric vibrator 400 is in a de-energized state.

[0065] Please see Figure 3 Since the end of the support plate 130 away from the second slot is fixedly connected to the inner wall of the mounting groove 122, the end of the support plate 130 away from the second slot can be regarded as the fixed end, while the end of the support plate 130 facing the second slot can be regarded as the free end. Compared with the fixed end, the free end can undergo a certain deformation under the action of the elastic force of the elastic member 140.

[0066] In this embodiment, by including a second slot in the mounting groove 122, meaning the mounting groove 122 can extend to the end face of the lens carrier 120 away from the image acquisition component 300, the size of the mounting groove 122 along the movement direction of the lens assembly 100 is increased, thereby increasing the travel range of the lens assembly 100. Furthermore, by setting the elastic element 140 as a V-shaped spring with its open end facing the second slot, the elastic element 140 will contact the free end near the support plate 130 and apply force to this contact position. This facilitates pushing the support plate 130 towards the piezoelectric vibrator 400, ensuring that the piezoelectric vibrator 400 and the support plate 130 remain in a pressing state, which is beneficial for achieving power-off self-locking of the camera module.

[0067] Optionally, the piezoelectric vibrator 400 includes a first piezoelectric ceramic layer 410, an elastic plate 420, and a second piezoelectric ceramic layer 430 arranged in sequence. The second end 460 of the piezoelectric vibrator 400 includes one end of the elastic plate 420 facing the support portion, and the end of the elastic plate 420 facing the support portion extends beyond the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430.

[0068] The elastic plate 420 can be any type of plate with good elasticity and wear resistance, such as various alloy plates.

[0069] The first piezoelectric ceramic layer 410 can be formed by depositing a large amount of piezoelectric ceramics on one surface of the elastic plate 420. Correspondingly, the second piezoelectric ceramic layer 430 can be formed by depositing a large amount of piezoelectric ceramics on the other surface of the elastic plate 420.

[0070] Please see Figure 23 The first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 can be respectively adhered to both sides of the elastic plate 420 along the thickness direction of the elastic plate 420. The end of the elastic plate 420 facing the bearing portion can be a friction head, which extends beyond the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 and is located at the edge of the elastic plate 420. The friction head and the elastic plate 420 can be integrally processed by wire cutting and stamping, or connected to the elastic plate 420 by bonding or surface mount technology (SMT).

[0071] In this embodiment, a first piezoelectric ceramic layer 410 and a second piezoelectric ceramic layer 430 are respectively provided on both sides of the elastic plate 420. Thus, during the operation of the piezoelectric vibrator 400, the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 can be controlled to move in the same direction, thereby increasing the driving force. Simultaneously, since piezoelectric ceramics themselves have poor wear resistance, by providing the elastic plate 420 between the two piezoelectric ceramic layers, with one end of the elastic plate 420 extending beyond the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430, the end of the elastic plate 420 facing the support portion acts as a friction head that contacts the support portion. The friction between this friction head and the support portion drives the lens assembly 100 to move. Therefore, during the movement of the lens assembly 100, the piezoelectric ceramics in the piezoelectric ceramic layers will not wear down, thereby improving the overall service life of the piezoelectric vibrator 400.

[0072] Optionally, the first piezoelectric ceramic layer 410 along the length direction of the piezoelectric vibrator 400 sequentially includes a first region, a second region, and a third region; the second piezoelectric ceramic layer 430 along the length direction of the piezoelectric vibrator 400 sequentially includes a fourth region, a fifth region, and a sixth region, wherein the first region is aligned with the fourth region, the second region is aligned with the fifth region, and the third region is aligned with the sixth region.

[0073] When the piezoelectric vibrator 400 is energized, the polarization directions of the first region, the third region, the fourth region, and the sixth region are the same, and the polarization directions of the second region and the fifth region are the same, while the polarization directions of the first region and the second region are opposite.

[0074] Please see Figure 24 In some embodiments of this application, both the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 are divided into three polarization regions. The polarization directions of the three polarization regions are as follows: the polarization directions of region A and region C are the same, and the polarization direction of region B is opposite to that of regions A and C. It can be understood that regions A, B, and C are three areas arranged sequentially along the length of the "first piezoelectric ceramic layer 410 or second piezoelectric ceramic layer 430". The shapes and sizes of the three regions can be the same.

[0075] The frequency response curve of the piezoelectric oscillator 400 is as follows: Figure 25 As shown, Figure 25 In the diagram, the horizontal axis represents frequency and the vertical axis represents amplitude. When the piezoelectric oscillator 400 is subjected to vibration with a frequency of [f1, f3], the mode excited by the piezoelectric oscillator 400 is a third-order bending vibration along the length direction, which is referred to here as the first working mode. The mode contour diagram is shown below. Figure 26(a); When a vibration with a frequency of [f2, f4] is applied to the piezoelectric vibrator 400, a longitudinal vibration along the length direction is excited in the piezoelectric vibrator 400, which is herein referred to as the second working mode, and the modal cloud diagram is as shown in Figure 26 (b).

[0076] When there is an overlap (Δf) between the excitation frequency range of the first working mode and the frequency excitation range of the second working mode, that is, when f2 < f3, if the excitation frequency at this time is within the range of [f2, f3], the first working mode and the second working mode of the piezoelectric vibrator 400 can be excited simultaneously, and at this time, the movement trajectory of the friction head is an elliptical trajectory. The schematic diagram of the movement trajectory of the friction head is as shown in Figure 27 indicated by the arrow F in

[0077] Driving method of the piezoelectric vibrator 400: Apply sinusoidal alternating current (which can also be square wave and triangular wave) to areas A and C of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 simultaneously; apply cosine alternating current (which can also be square wave and triangular wave, but its phase needs to differ by π / 2 from that applied to areas A and B) to area B of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430, and thus, the driving of the piezoelectric vibrator 400 can be completed. The applied alternating voltage is as shown in Figure 28 shown in Figure 28 where the abscissa is time and the ordinate is voltage.

[0078] Please refer to Figure 29 , apply current to different areas of the piezoelectric vibrator 400 according to the above power-on method, and apply a pre-pressure obliquely upward at the bottom of the piezoelectric vibrator 400, that is, apply a pre-pressure along the direction indicated by the arrow D in Figure 29 . With this, the piezoelectric vibrator 400 can drive the carrier plate 130 to drive the lens assembly 100 to perform a linear motion along the direction indicated by the arrow E in Figure 29 or the opposite direction of the direction indicated by the arrow E.

[0079] In this embodiment, by making the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 respectively include three areas and controlling the polarization directions of each area, thus, the piezoelectric vibrator 400 can be made to drive the carrier plate 130 to drive the lens assembly 100 to perform a linear motion.

[0080] Optionally, the first end 450 of the piezoelectric vibrator 400 includes the end of the elastic plate 420 far from the bearing part, and the end of the elastic plate 420 far from the bearing part extends outside the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430.

[0081] Specifically, the driving principle of the piezoelectric vibrator 400 is as follows: energizing the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 respectively, causing the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 to move synchronously, thereby driving the elastic plate 420 located between them to move. In this way, the lens assembly 100 can be driven to move through one end of the elastic plate 420 toward the bearing plate 130. Because the positions of each region of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 will move during this process, fixing the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 will cause the vibration pattern of the piezoelectric vibrator 400 to change. Therefore, in this embodiment, the end of the elastic plate 420 away from the bearing portion extends out of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430, and the end of the elastic plate 420 away from the bearing portion is used as the first end 450 of the piezoelectric vibrator 400, so as to fix the end of the elastic plate 420 away from the bearing portion to the support base 200.

[0082] In this embodiment, by using the end of the elastic plate 420 furthest from the support portion as the first end 450 of the piezoelectric vibrator 400, and fixing the end of the elastic plate 420 furthest from the support portion to the support base 200, it is possible to ensure that the movement of each region of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 is unrestricted. At the same time, since the fixed position of the elastic plate 420 is the position of the elastic plate 420 furthest from the support portion, and the other positions of the elastic plate 420 are movable, it is beneficial to increase the travel range of the elastic plate 420 toward the support portion, thereby increasing the travel range of the lens assembly 100.

[0083] Optionally, the camera module further includes a second circuit board 600, which includes a flexible circuit board 610. The flexible circuit board 610 covers the outer surface of the first piezoelectric ceramic layer 410 and the outer surface of the second piezoelectric ceramic layer 430, respectively, and the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 are electrically connected to the first circuit board 500 through the second circuit board 600.

[0084] Please see Figure 4-5In some embodiments of this application, the second circuit board 600 may include a U-shaped flexible circuit board 610, and the piezoelectric vibrator 400 is embedded in the flexible circuit board 610 so that the flexible circuit board 610 covers the outer surface of the first piezoelectric ceramic layer 410 and the outer surface of the second piezoelectric ceramic layer 430 respectively. At the same time, the second end 460 of the piezoelectric vibrator 400 extends from the U-shaped opening of the second circuit board 600 so that the second end 460 of the piezoelectric vibrator 400 drives the lens assembly 100.

[0085] Specifically, since different regions of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 have different power supply methods, by having the flexible circuit board 610 cover the outer surfaces of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 respectively, it is convenient to electrically connect each region of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 to the flexible circuit board 610.

[0086] Since each region of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 is composed of independent piezoelectric ceramics stacked together, and each piezoelectric ceramic has an insulating protective film on its surface, the piezoelectric ceramics in different regions will not conduct to each other, thereby enabling separate power supply to the piezoelectric ceramics in different regions.

[0087] In some embodiments of this application, the second circuit board 600 may further include a rectangular connecting plate 620, and a U-shaped flexible circuit board 610 is electrically connected to the first circuit board 500 through the connecting plate 620.

[0088] In this embodiment, the flexible circuit board 610 covers the outer surfaces of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430, respectively. The first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 are electrically connected to the first circuit board 500 through the second circuit board 600. In this way, the first circuit board 500 can conveniently supply power to each area of ​​the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 through the second circuit board 600, so as to realize that the second end 460 of the piezoelectric vibrator 400 outputs linear motion toward or away from the image acquisition component 300.

[0089] Optionally, the surface of the second end 460 of the piezoelectric vibrator 400 is provided with a wear-resistant layer.

[0090] The wear-resistant layer can be any coating with wear-resistant properties. For example, the wear resistance of the material can be increased and its lifespan extended by surface hardening treatment of the material at the second end 460 of the piezoelectric vibrator 400. The surface hardening treatment can be a coating treatment, etc.

[0091] In this embodiment, by providing a wear-resistant layer on the surface of the second end 460 of the piezoelectric vibrator 400, the wear resistance of the second end 460 of the piezoelectric vibrator 400 is improved, thereby improving the service life of the piezoelectric vibrator 400.

[0092] Optionally, the lens carrier 120 has a first guide channel 123 extending along the movement direction of the lens assembly 100, and the support base 200 includes a guide rod 230 extending from the bottom of the receiving groove 210 to the opening side of the receiving groove 210, the guide rod 230 being slidably inserted within the first guide channel 123; or,

[0093] The lens carrier 120 has a first guide groove 121 extending along the movement direction of the lens assembly 100, and the support base 200 has a second guide groove 240 extending along the movement direction of the lens assembly 100. The opening of the first guide groove 121 is opposite to the opening of the second guide groove 240. A ball bearing 800 is provided between the first guide groove 121 and the second guide groove 240, and the ball bearing 800 abuts against the groove wall of the first guide groove 121 and the groove wall of the second guide groove 240 respectively.

[0094] Please see Figure 1 In some embodiments of this application, the lens carrier 120 has two first guide channels 123, which are respectively located near the two ends of the mounting groove 122.

[0095] The cross-sectional dimensions and shape of the first guide channel 123 can be the same as those of the guide rod 230, or the cross-sectional dimensions of the first guide channel 123 can be larger than those of the guide rod 230. In some embodiments of this application, when the cross-sectional dimensions of the first guide channel 123 are larger than those of the guide rod 230, two adjacent inner sidewalls of the first guide channel 123 can be combined to form a V-shaped surface. This V-shaped surface extends along the length of the first guide channel 123, and the guide rod 230 only contacts the two inner walls that make up the V-shaped surface, without contacting the other inner walls in the first guide channel 123. In this way, the guide rod 230 can be limited, and the contact area between the guide rod 230 and the first guide channel 123 can be reduced, thereby reducing the frictional resistance between the guide rod 230 and the first guide channel 123, so as to facilitate the movement of the lens assembly 100 along the guide rod 230.

[0096] Please see Figure 20 In other embodiments of this application, there are two of each of the first guide groove 121 and the second guide groove 240. The two first guide grooves 121 are located near both ends of the mounting groove 122, and the two second guide grooves 240 are located near both ends of the mounting groove 122. Each of the two first guide grooves 121 and the two second guide grooves 240 corresponds one-to-one. The openings of the corresponding first guide grooves 121 and the second guide grooves 240 face each other to form a guide channel. Each guide channel contains at least one of the aforementioned ball bearings 800. Please refer to [link to previous document]. Figure 22 In some embodiments of this application, three ball bearings 800 are embedded in each guide channel.

[0097] The first guide groove 121 and the second guide groove 240 are both V-shaped grooves with a V-shaped cross-section. This helps to reduce the contact area between the ball bearing 800 and the first guide groove 121 and the second guide groove 240, thereby reducing the frictional resistance between the ball bearing 800 and the first guide groove 121 and the second guide groove 240. It is understood that during the movement of the lens assembly 100 (equivalent to a support column) towards or away from the image acquisition assembly 300, the ball bearing 800 can roll relative to the first guide groove 121 and the second guide groove 240, respectively.

[0098] In this embodiment, a guide structure is provided between the lens carrier 120 and the support 200. This can guide the movement of the lens carrier 120, thereby enabling directional positioning of the movement of the lens assembly 100 and achieving precise movement in conjunction with piezoelectric drive.

[0099] For ease of understanding, the embodiments of this application provide... Figure 1The assembly process of the camera module provided in the illustrated embodiment will be further explained. Specifically, the assembly process may include the following steps:

[0100] Please see Figure 4 The piezoelectric vibrator 400 is assembled into the second circuit board 600 to obtain... Figure 5 The assembly structure shown;

[0101] Please see Figure 6 A guide rod 230 is fixedly installed in the support base 200, and the assembly structure of the "piezoelectric vibrator 400 and the second circuit board 600" is installed on the inner side wall of the support base 200, thereby obtaining... Figure 7 The assembly structure shown;

[0102] Please see Figure 8 The lens carrier 120 is installed in the receiving groove 210 of the support 200 to obtain... Figure 9 The assembly structure shown;

[0103] Please see Figure 10 and Figure 11 The support plate 130 and the elastic element 140 are installed in the mounting groove 122 of the lens carrier 120 to obtain... Figure 12 The assembly structure shown;

[0104] Please see Figure 13 The camera module also includes a housing 700, which is fastened onto the support base 200, thereby fixing the housing 700 to the support base 200. Figure 14 The assembly structure shown;

[0105] Please see Figure 15 The lens body 110 is fixedly installed in the through hole inside the lens carrier 120 to obtain... Figure 16 The assembly structure shown;

[0106] Please see Figure 17 The image acquisition component 300 and the first circuit board 500 are assembled with the support base 200 to obtain... Figure 18 The assembly structure shown completes the assembly process of the camera module.

[0107] This application also provides an electronic device, which includes the camera module described in the above embodiments.

[0108] In this embodiment, since the electronic device includes the camera module described in the above embodiments, the electronic device can implement each process of the camera module in the above embodiments and has the same beneficial effects. To avoid repetition, it will not be described again here.

[0109] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A camera module, comprising: The lens assembly, the support seat and the image acquisition assembly are sequentially stacked, the support seat comprises a containing groove, the lens assembly is embedded in the containing groove, a first through hole is formed in the groove bottom of the containing groove, the light exit surface of the lens assembly and the light entrance surface of the image acquisition assembly are respectively opposite to the first through hole, the lens assembly is in sliding connection with the support seat; The lens assembly comprises a bearing part, the first end of the piezoelectric vibrator is fixedly connected with the support seat, and the second end of the piezoelectric vibrator is in abutment with the bearing part; Wherein, in the case that the piezoelectric vibrator is in the energized state, the second end of the piezoelectric vibrator drives the lens assembly to move towards or away from the image acquisition assembly through the friction force between the second end and the bearing part; The piezoelectric vibrator comprises a first piezoelectric ceramic layer, an elastic plate and a second piezoelectric ceramic layer which are sequentially stacked, the second end of the piezoelectric vibrator comprises one end of the elastic plate which is towards the bearing part, and the one end of the elastic plate which is towards the bearing part protrudes out of the first piezoelectric ceramic layer and the second piezoelectric ceramic layer; The one end of the elastic plate which is away from the bearing part protrudes out of the first piezoelectric ceramic layer and the second piezoelectric ceramic layer, and the one end of the elastic plate which is away from the bearing part is the first end of the piezoelectric vibrator, so as to be fixedly connected with the support seat through the one end of the elastic plate which is away from the bearing part. The lens assembly comprises a lens body, a lens carrier, a bearing plate and an elastic piece, the lens body is fixedly connected with the lens carrier, the outer side wall of the lens carrier is provided with a mounting groove, the mounting groove comprises a first slot opening opposite to the inner wall of the support seat and a first inner wall adjacent to the first slot opening; 2. The camera module of claim 1, wherein, The piezoelectric vibrator, the bearing plate and the elastic piece are respectively located in the mounting groove, and the elastic piece is elastically compressed between the bearing plate and the first inner wall, the end face of the bearing plate on the side opposite to the elastic piece is in abutment with the second end of the piezoelectric vibrator, and the bearing part comprises the end face of the bearing plate on the side opposite to the elastic piece. The mounting groove further comprises a second slot opening, and the second slot opening is located on the end face of the lens carrier away from the image acquisition assembly; 3. The camera module of claim 2, wherein, The bearing plate is perpendicular to the plane where the second slot opening is located, and the end of the bearing plate away from the second slot opening is fixedly connected with the inner wall of the mounting groove, and the elastic piece is a V-shaped elastic piece, and the opening end of the elastic piece is towards the second slot opening. The first piezoelectric ceramic layer comprises a first region, a second region and a third region in sequence along the length direction of the piezoelectric vibrator, the second piezoelectric ceramic layer comprises a fourth region, a fifth region and a sixth region in sequence along the length direction of the piezoelectric vibrator, the first region is aligned with the fourth region, the second region is aligned with the fifth region, and the third region is aligned with the sixth region; 4. The camera module of claim 1, wherein, ​ In the case that the piezoelectric vibrator is in the energized state, the polarization directions of the first region, the third region, the fourth region and the sixth region are the same, and the polarization directions of the second region and the fifth region are the same, and the polarization directions of the first region and the second region are opposite.

5. The camera module of claim 1, wherein, The camera module further comprises a second circuit board, the second circuit board comprises a flexible circuit board, the flexible circuit board covers the outer surfaces of the first piezoelectric ceramic layer and the second piezoelectric ceramic layer respectively, and the first piezoelectric ceramic layer and the second piezoelectric ceramic layer are electrically connected with the first circuit board through the second circuit board respectively.

6. The camera module of claim 1, wherein, The surface of the second end of the piezoelectric vibrator is provided with a wear-resistant layer.

7. The camera module of claim 2, wherein, The lens carrier is provided with a first guide channel extending along the movement direction of the lens assembly, the support seat comprises a guide rod extending from the groove bottom of the accommodating groove to the side of the groove opening of the accommodating groove, and the guide rod is slidably arranged in the first guide channel; or, The lens carrier is provided with a first guide channel extending along the movement direction of the lens assembly, the support seat comprises a guide rod extending from the groove bottom of the accommodating groove to the side of the groove opening of the accommodating groove, and the guide rod is slidably arranged in the first guide channel; or, 8. An electronic device, comprising: The lens carrier is provided with a first guide channel extending along the movement direction of the lens assembly, the support seat comprises a guide rod extending from the groove bottom of the accommodating groove to the side of the groove opening of the accommodating groove, and the guide rod is slidably arranged in the first guide channel; or, The camera module comprises the camera module according to any one of claims 1 to 7. The camera module comprises the camera module according to any one of claims 1 to 7.

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