Camera module and electronic equipment

Abstract

The invention 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 respectively; the lens assembly, the supporting seat and the image acquisition assembly are sequentially stacked, the supporting seat comprises a containing groove, the supporting seat is embedded in the containing groove, a first through hole is formed in the groove bottom of the containing groove, the light emitting surface of the lens assembly and the light incident surface of the image acquisition assembly are opposite to the first through hole, 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 abuts against the bearing part; wherein under the condition that the piezoelectric vibrator is in a power-on state, the second end of the piezoelectric vibrator drives the lens assembly to move towards or away from the image acquisition assembly through friction force between the second end of the piezoelectric vibrator and the bearing part.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and in particular to a camera module and an electronic device. Background Art

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

[0003] In the above-mentioned camera module, the space size of the motor is relatively large, and as the pixel of the camera continues to increase, the weight of the lens will become heavier and heavier. In order to provide sufficient driving force, the space size of the motor will also be further increased, which will cause the camera module to occupy a larger space on the electronic device, which is not conducive to the miniaturization design of the electronic device. Summary of the invention

[0004] The present application provides a camera module and an electronic device, which are beneficial to reducing the space required for a driving structure in the camera module, thereby facilitating the miniaturization design of the electronic device.

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

[0006] The lens assembly, the support seat and the image acquisition assembly are stacked in sequence, the support seat comprises a receiving groove, the support seat is embedded in the receiving groove, a first through hole is provided at the bottom of the receiving groove, a light emitting surface of the lens assembly and a light incident surface of the image acquisition assembly are respectively opposite to the first through hole, and the lens assembly is slidably connected to the support seat;

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

[0008] Wherein, when the piezoelectric vibrator is in a powered-on state, the second end of the piezoelectric vibrator drives the lens assembly to move toward or away from the image acquisition assembly through the friction between the second end of the piezoelectric vibrator and the bearing portion.

[0009] In a second aspect, the present application provides an electronic device, comprising the camera module described in the first aspect.

[0010] In the embodiment of the present application, a piezoelectric vibrator is used as a driving structure in the camera module to drive the lens assembly to 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 reducing the space required for the driving structure in the camera module, which is beneficial to the miniaturization design of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is an exploded view of a camera module provided in an embodiment of the present application;

[0012] Figure 2 yes Figure 1 A top view of the camera module after assembly is shown;

[0013] Figure 3 yes Figure 2 A cross-sectional view of section AA in FIG.

[0014] Figure 4 It is one of the schematic diagrams of the camera module assembly process in the embodiment of the present application;

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

[0016] Figure 6 This is the third schematic diagram of the process of assembling the camera module in the embodiment of the present application;

[0017] Figure 7 This is a fourth schematic diagram of the process of assembling the camera module in the embodiment of the present application;

[0018] Figure 8 This is a fifth schematic diagram of the process of assembling the camera module in the embodiment of the present application;

[0019] Fig. 9 This is the sixth schematic diagram of the process of assembling the camera module in the embodiment of the present application;

[0020] Fig.10 FIG7 is a seventh schematic diagram of the process of assembling a camera module in an embodiment of the present application;

[0021] Fig.11 FIG8 is a schematic diagram of the assembly process of the camera module in the embodiment of the present application;

[0022] Fig.12 FIG9 is a ninth schematic diagram of the process of assembling a camera module in an embodiment of the present application;

[0023] Fig.13 FIG10 is a tenth schematic diagram of the process of assembling a camera module in an embodiment of the present application;

[0024] Fig.14 FIG11 is a schematic diagram of the assembly process of the camera module in the embodiment of the present application;

[0025] Fig.15 FIG. 12 is a schematic diagram of the process of assembling the camera module in the embodiment of the present application;

[0026] Fig.16 FIG. 13 is a schematic diagram of the process of assembling a camera module in an embodiment of the present application;

[0027] Fig.17 FIG. 14 is a schematic diagram of the process of assembling a camera module in an embodiment of the present application;

[0028] Fig.18 FIG15 is a schematic diagram of the process of assembling a camera module in an embodiment of the present application;

[0029] Fig.19 is a structural schematic diagram of a camera module provided in another embodiment of the present application;

[0030] Fig. 20 yes Fig.19 A cross-sectional view of section BB in FIG.

[0031] Fig.21 yes Fig.19 A side view of the camera module in the illustrated embodiment;

[0032] Fig. 22 yes Fig.21 A cross-sectional view of the CC section in FIG.

[0033] Fig.23 It is a schematic diagram of the structure of a piezoelectric vibrator;

[0034] Fig.24 is a schematic diagram of the area division of the first piezoelectric ceramic layer or the second piezoelectric ceramic layer in an embodiment of the present application;

[0035] Fig.25 It is a schematic diagram of the frequency response curve of the piezoelectric vibrator;

[0036] Fig.26 is a mode cloud diagram of the first working mode and the second working mode of the piezoelectric vibrator;

[0037] Fig. 27 It is a schematic diagram of the motion trajectory of the friction head of the piezoelectric vibrator;

[0038] Fig.28 is a schematic diagram of the voltage applied to the piezoelectric vibrator in some embodiments of the present application;

[0039] Fig.29It is a schematic diagram of the connection between the piezoelectric vibrator and the carrier plate. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0041] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0042] In the following, in combination with the accompanying drawings, a camera module and an electronic device provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0043] See also Figure 1 , Figure 1 A schematic structural diagram of a camera module provided in an embodiment of the present application, wherein the camera module comprises a lens assembly 100, a support seat 200, an image acquisition assembly 300, a piezoelectric vibrator 400 and a first circuit board 500, wherein 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 seat 200 and the image acquisition assembly 300 are stacked in sequence, the support seat 200 includes a receiving groove 210, the support seat 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 exit surface of the lens assembly 100 and the light incident surface of the image acquisition assembly 300 are respectively opposite to the first through hole 220, and the lens assembly 100 is slidably connected to the support seat 200;

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

[0046] When the piezoelectric vibrator 400 is in a powered-on state, 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 the friction between the second end 460 and the bearing portion.

[0047] See also Figure 1 In some embodiments of the present application, the lens assembly 100 may include a lens body 110 and a lens carrier 120 , wherein the lens body 110 may be composed of a plurality of lenses and lens fixtures, and is mainly responsible for focusing light. The lens carrier 120 is used to carry the lens body 110 .

[0048] See also Figure 1 In some embodiments of the present application, the image acquisition component 300 may include a filter 310, a filter holder 320 and a photosensitive imaging chip 330, wherein the filter holder 320 may be fixedly connected to the end face of the support seat 200 facing the image acquisition component 300, and the fixed connection method between the filter holder 320 and the support seat 200 may be a fixed connection method for various scenarios, for example, it may be a connection method 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 installed 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 surface of the lens body 110 facing the first through hole 220 is the light exit surface of the lens assembly 100, and the end surface 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 the imaging quality. The filter holder 320 can be used to support the filter 310 and protect the photosensitive imaging chip 330. The photosensitive imaging chip 330 can be a variety of semiconductor chips that use the photoelectric conversion effect to record light changes. Among them, the imaging process of the camera module may include: external light enters the lens assembly 100, the light entering the lens assembly 100 can pass through the light exit 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 may be a circuit board in a camera module for various scenarios, for example, a flexible circuit board, wherein the first circuit board 500 may be used to fix the camera module and connect the camera module to the entire device.

[0051] The piezoelectric vibrator 400 may also be a piezoelectric resonator, and the piezoelectric vibrator 400 may specifically be a vibrator including piezoelectric ceramics, wherein when the piezoelectric vibrator 400 is energized, the piezoelectric vibrator 400 will usually vibrate, and the amplitude and direction of the vibration are related to the current passed in. In this way, the vibration process of the piezoelectric vibrator 400 can be controlled by controlling the current passed in the piezoelectric vibrator 400, and then the second end 460 of the piezoelectric vibrator 400 can be controlled to move toward or away from the image acquisition component 300. In this way, under the action of the friction force between the second end 460 of the piezoelectric vibrator 400 and the bearing part, the lens assembly 100 can be driven to move toward or away from the image acquisition component 300 to achieve the focusing process of the camera module.

[0052] In this embodiment, the lens assembly 100 is driven by using the piezoelectric vibrator 400 as the driving structure in the camera module to achieve the focusing process of the camera module. Since the piezoelectric vibrator 400 has the characteristics of small size and large torque, the use of this driving structure is conducive to reducing the space required for the driving structure in the camera module, thereby facilitating the miniaturization design of the electronic device. In addition, in the embodiment of the present application, by using the piezoelectric vibrator 400 as the driving structure in the camera module, compared with the electromagnetic drive method, no electromagnetic interference is generated.

[0053] In the related art, when the camera module adopts an electromagnetically driven motor, since the electromagnetically driven motor has a relatively large movable space, there is a relatively obvious sound problem when the user shakes the electronic device, which in turn brings a bad experience to the user.

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

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

[0056] The carrier plate 130 can be fixedly connected to the lens carrier 120, so that the friction between the second end 460 of the piezoelectric vibrator 400 and the carrier plate 130 can drive the carrier plate 130 and the lens carrier 120 to move synchronously. The carrier plate 130 can be various metal plates, for example, various alloy plates, which is conducive to improving the wear resistance of the carrier plate 130, thereby facilitating the service life of the camera module.

[0057] The elastic member 140 may be any of various elastic members 140 , for example, a spring, a spring or a torsion spring.

[0058] See also Figure 1 and Figure 3 In some embodiments of the present application, the mounting groove 122 is a strip-shaped mounting groove 122, and the extension 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 assembly 300. The first inner wall 1221 is an inner wall adjacent to the first notch and parallel to the moving direction of the lens assembly 100. The extension direction of the piezoelectric vibrator 400 when not powered can be perpendicular to the moving direction of the lens assembly 100.

[0059] It can be understood that, by providing the first notch, it is convenient for the support base 200 to pass through the first notch and be fixedly connected to the first end 450 of the piezoelectric vibrator 400 .

[0060] The elastic compression of the elastic member 140 between the supporting plate 130 and the first inner wall 1221 specifically means that: the elastic member 140 is in an elastically compressed state, and one end of the elastic member 140 is in contact with the supporting plate 130, and the other end of the elastic member 140 is in contact with the first inner wall 1221, so that the direction of the elastic force of the elastic member 140 acting on the supporting plate 130 is: from the supporting plate 130 to the piezoelectric vibrator 400, so that the supporting plate 130 and the second end 460 of the piezoelectric vibrator 400 are always maintained in a compressed state.

[0061] In this embodiment, an elastic member 140 in an elastic compression state is provided between the carrier plate 130 and the first inner wall 1221, so that the carrier plate 130 and the second end 460 of the piezoelectric vibrator 400 can always maintain a pressed state. In this way, even if the piezoelectric vibrator 400 is in a power-off state, since the carrier plate 130 and the second end 460 of the piezoelectric vibrator 400 always maintain a pressed state, the camera module can be self-locked in the power-off state. At the same time, since the piezoelectric vibrator 400, the carrier plate 130, the elastic member 140 and the first inner wall 1221 are tightly connected in sequence, there is no movable space between them. Therefore, when the user shakes the electronic device, the driving structure in the camera module is not prone to problems such as abnormal noise.

[0062] Optionally, the mounting groove 122 further includes a second notch, and the second notch is located on an end surface of the lens carrier 120 away from the image acquisition component 300;

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

[0064] The supporting plate 130 is disposed perpendicularly to the plane where the second notch is located, which may mean that when the piezoelectric vibrator 400 is in a power-off state, the supporting plate 130 is disposed perpendicularly to the plane where the second notch is located.

[0065] See also Figure 3 Since the end of the supporting plate 130 away from the second slot is fixedly connected to the inner wall of the mounting slot 122, the end of the supporting plate 130 away from the second slot can be regarded as a fixed end, and the end of the supporting plate 130 facing the second slot can be regarded as a free end. Compared with the fixed end, the free end can produce a certain deformation under the action of the elastic force of the elastic member 140.

[0066] In this embodiment, by making the mounting groove 122 also include a second notch, that is, the mounting groove 122 can extend to the end surface of the lens carrier 120 away from the image acquisition assembly 300, so as to increase the size of the mounting groove 122 along the movement direction of the lens assembly 100, thereby increasing the travel range of the lens assembly 100. In addition, by setting the elastic member 140 as a V-shaped spring sheet, and the open end of the spring sheet facing the second notch, the elastic member 140 will contact the position close to the free end of the carrier plate 130, and apply force to the contact position close to the free end of the carrier plate 130, so as to facilitate pushing the carrier plate 130 to deform toward the side of the piezoelectric vibrator 400, so that the piezoelectric vibrator 400 and the carrier plate 130 always maintain a pressed state, which is conducive to realizing the 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 which are stacked in sequence, and the second end 460 of the piezoelectric vibrator 400 includes an end of the elastic plate 420 facing the bearing portion, and the end of the elastic plate 420 facing the bearing portion extends beyond the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430.

[0068] The elastic plate 420 may be any plate having elasticity and good wear resistance, for example, any alloy plate.

[0069] The first piezoelectric ceramic layer 410 may be a piezoelectric ceramic layer formed by stacking a large number of piezoelectric ceramics on one surface of the elastic plate 420 . Accordingly, the second piezoelectric ceramic layer 430 may be a piezoelectric ceramic layer formed by stacking a large number of piezoelectric ceramics on the other surface of the elastic plate 420 .

[0070] See also Fig.23 , the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 can be respectively pasted on both sides of the elastic plate 420 along the thickness direction of the elastic plate 420. Among them, one end of the elastic plate 420 facing the bearing portion can be a friction head, the friction head extends out of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430, and the friction head is 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, and can also be connected to the elastic plate 420 by bonding or surface mounting technology (SMT) and other processes.

[0071] In this embodiment, the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 are respectively arranged on both sides of the elastic plate 420, so that 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 manner, thereby facilitating the increase of the driving force. At the same time, since the wear resistance of the piezoelectric ceramic itself is relatively poor, the elastic plate 420 is arranged between the two piezoelectric ceramic layers, and one end of the elastic plate 420 facing the bearing portion is extended out of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430, that is, the end of the elastic plate 420 facing the bearing portion is used as a friction head to contact the bearing portion, and the friction between the friction head and the bearing portion drives the lens assembly 100 to move. In this way, in the process of driving the lens assembly 100 to move, the piezoelectric ceramics in the piezoelectric ceramic layer will not be worn, thereby facilitating the overall service life of the piezoelectric vibrator 400.

[0072] Optionally, along the length direction of the piezoelectric vibrator 400, the first piezoelectric ceramic layer 410 includes: a first region, a second region and a third region in sequence; along the length direction of the piezoelectric vibrator 400, the second piezoelectric ceramic layer 430 includes: a fourth region, a fifth region and a sixth region in sequence, 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 in a powered state, the first region, the third region, the fourth region and the sixth region have the same polarization direction, the second region and the fifth region have the same polarization direction, and the first region and the second region have opposite polarization directions.

[0074] See also Fig.24 In some embodiments of the present application, the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 need to be divided into three polarization zones, and the polarization directions of the three polarization zones are: the polarization directions of zone A and zone C are the same, and the polarization direction of zone B is opposite to the polarization directions of zone A and zone C. It can be understood that zone A, zone B and zone C are three regions arranged in sequence in the length direction of the "first piezoelectric ceramic layer 410 or the 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 vibrator 400 is as follows: Fig.25 As shown, Fig.25 The horizontal axis is the frequency, and the vertical axis is the amplitude. When the piezoelectric vibrator 400 is subjected to a vibration with a frequency of [f1, f3], the mode excited by the piezoelectric vibrator 400 is the third-order bending vibration along the length direction, which is referred to as the first working mode. The modal cloud diagram is shown in FIG. Fig.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 Fig.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 Fig. 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 regions 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 from that applied to regions A and B by π / 2) to region B of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430, and the driving of the piezoelectric vibrator 400 can be completed. The applied alternating voltage is as shown in Fig.28 shown, Fig.28 where the abscissa is time and the ordinate is voltage.

[0078] Please refer to Fig.29 , apply current to different regions 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 Fig.29 , and 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 Fig.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 regions and controlling the polarization directions of each region, in this way, it is possible to realize that the piezoelectric vibrator 400 drives 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 portion, and the end of the elastic plate 420 far from the bearing portion extends outside the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430.

[0081] Specifically, since the driving principle of the piezoelectric vibrator 400 is: power is supplied to the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 respectively, so that the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 move synchronously, and then drive the elastic plate 420 located therebetween to move, in this way, the lens assembly 100 can be driven to move toward one end of the supporting plate 130 through the elastic plate 420. Since the positions of various regions of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 will move during this process, if the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 are fixed, the vibration law of the piezoelectric vibrator 400 will change. Therefore, in an embodiment of the present application, the end of the elastic plate 420 away from the bearing portion is extended beyond 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 that it is fixedly connected to the support seat 200 through the end of the elastic plate 420 away from the bearing portion.

[0082] In this embodiment, by using the end of the elastic plate 420 away from the bearing portion as the first end 450 of the piezoelectric vibrator 400, and fixing the end of the elastic plate 420 away from the bearing portion with the support seat 200, it can be ensured that the movement of each area of ​​the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 is not restricted. At the same time, since the fixed position of the elastic plate 420 is the position farthest from the bearing portion in the elastic plate 420, and the other positions of the elastic plate 420 except the fixed position can be movable, it is beneficial to increase the travel range of the elastic plate 420 toward one end of the bearing portion, and further help to increase the travel range of the lens assembly 100.

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

[0084] See also Figure 4-5In some embodiments of the present 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 out 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 areas of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 have different power supply modes, the flexible circuit board 610 is respectively covered on the outer surface of the first piezoelectric ceramic layer 410 and the outer surface of the second piezoelectric ceramic layer 430. In this way, it is convenient to electrically connect various areas of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 to the flexible circuit board 610, respectively.

[0086] Among them, since each area of ​​the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 is formed by stacking independent piezoelectric ceramics, and the surface of each piezoelectric ceramic has an insulating protective film, the piezoelectric ceramics in different areas will not be conductive to each other, so that the piezoelectric ceramics in different areas can be powered separately.

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

[0088] In this embodiment, the flexible circuit board 610 is used to cover 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 respectively through the second circuit board 600. In this way, the first circuit board 500 can conveniently supply power to various areas of the first piezoelectric ceramic layer 410 and the second piezoelectric ceramic layer 430 respectively through the second circuit board 600, so as to realize the second end 460 of the piezoelectric vibrator 400 outputting a linear motion toward or away from the image acquisition component 300.

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

[0090] Among them, the wear-resistant layer can be various coatings with wear-resistant properties. For example, the wear resistance of the material can be increased and the service life can be improved by performing surface hardening treatment on the material at the second end 460 of the piezoelectric vibrator 400. Among them, the surface hardening treatment can be a coating treatment, etc.

[0091] In this embodiment, a wear-resistant layer is provided on the surface of the second end 460 of the piezoelectric vibrator 400 , which is beneficial to improving the wear resistance of the second end 460 of the piezoelectric vibrator 400 , thereby facilitating improving the service life of the piezoelectric vibrator 400 .

[0092] Optionally, the lens carrier 120 is provided with a first guide channel 123 extending along the movement direction of the lens assembly 100, and the support seat 200 includes a guide rod 230 extending from the bottom of the accommodating groove 210 to one side of the notch of the accommodating groove 210, and the guide rod 230 is slidably arranged in the first guide channel 123; or,

[0093] The lens carrier 120 is provided with a first guide groove 121 extending along the movement direction of the lens assembly 100, and the support seat 200 is provided with a second guide groove 240 extending along the movement direction of the lens assembly 100, the notch of the first guide groove 121 is opposite to the notch of the second guide groove 240, a ball 800 is provided between the first guide groove 121 and the second guide groove 240, and the ball 800 is respectively abutted against the groove wall of the first guide groove 121 and the groove wall of the second guide groove 240.

[0094] See also Figure 1 In some embodiments of the present application, two first guide channels 123 are provided on the lens carrier 120 , and the two first guide channels 123 are respectively close to two ends of the mounting groove 122 .

[0095] The cross-sectional size and shape of the first guide channel 123 may be the same as the cross-sectional size and shape of the guide rod 230, or the cross-sectional size of the first guide channel 123 may be larger than the cross-sectional size of the guide rod 230. In some embodiments of the present application, when the cross-sectional size of the first guide channel 123 is larger than the cross-sectional size of the guide rod 230, two adjacent inner side walls of the first guide channel 123 may be combined to form a V-shaped surface, which extends along the length direction of the first guide channel 123, and the guide rod 230 only contacts the two inner walls forming the V-shaped surface, and does not contact 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 friction 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] See also Fig. 20 In some other embodiments of the present application, the number of the first guide groove 121 and the second guide groove 240 are two respectively, the two first guide grooves 121 are respectively close to the two ends of the installation groove 122, the two second guide grooves 240 are respectively close to the two ends of the installation groove 122, and the two first guide grooves 121 correspond to the two second guide grooves 240 one by one, the notches of the corresponding first guide grooves 121 and the notches of the second guide grooves 240 are opposite to each other, so as to enclose and form a guide channel, and at least one of the above-mentioned ball bearings 800 is embedded in each guide channel. See Fig. 22 In some embodiments of the present application, three balls 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 V-shaped cross-sections, which is conducive to reducing the contact area between the ball 800 and the first guide groove 121 and the second guide groove 240, and reducing the friction resistance between the ball 800 and the first guide groove 121 and the second guide groove 240. It can be understood that when the lens assembly 100 is equivalent to the support column moving toward or away from the image acquisition assembly 300, the ball 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 seat 200, so that the movement process of the lens carrier 120 can be guided, thereby directional positioning of the movement process of the lens assembly 100 can be achieved, and precise movement can be achieved in conjunction with a piezoelectric drive method.

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

[0100] See also Figure 4 , assemble the piezoelectric vibrator 400 into the second circuit board 600, and obtain Figure 5 The assembly structure shown;

[0101] See also Figure 6 , the guide rod 230 is fixedly installed in the support seat 200, and the assembly structure of the "piezoelectric vibrator 400 and the second circuit board 600" is installed on the inner wall of the support seat 200, so as to obtain Figure 7 The assembly structure shown;

[0102] See also Figure 8 , install the lens carrier 120 in the receiving groove 210 of the support seat 200, and obtain Fig. 9 The assembly structure shown;

[0103] See also Fig.10 and Fig.11 , the carrier plate 130 and the elastic member 140 are installed in the installation groove 122 of the lens carrier 120, and the Fig.12 The assembly structure shown;

[0104] See also Fig.13 The camera module further comprises a housing 700, which is buckled on the support base 200 and fixedly connected to the support base 200. Fig.14 The assembly structure shown;

[0105] See also Fig.15 The lens body 110 is fixedly mounted in the through hole inside the lens carrier 120, and the ... Fig.16 The assembly structure shown;

[0106] See also Fig.17 , assemble the image acquisition component 300 and the first circuit board 500 with the support base 200 to obtain Fig.18 The assembly structure shown in the figure completes the assembly process of the camera module.

[0107] An embodiment of the present application also provides an electronic device, which includes the camera module described in the above embodiment.

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

[0109] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A camera module, characterized in that: It includes a lens assembly, a support seat, an image acquisition assembly, a piezoelectric vibrator and a first circuit board, wherein the image acquisition assembly and the piezoelectric vibrator are electrically connected to the first circuit board respectively; The lens assembly, the support seat and the image acquisition assembly are stacked in sequence, the support seat comprises a receiving groove, the support seat is embedded in the receiving groove, a first through hole is provided at the bottom of the receiving groove, a light emitting surface of the lens assembly and a light incident surface of the image acquisition assembly are respectively opposite to the first through hole, and the lens assembly is slidably connected to the support seat; The lens assembly comprises a bearing portion, the first end of the piezoelectric vibrator is fixedly connected to the support seat, and the second end of the piezoelectric vibrator abuts against the bearing portion; Wherein, when the piezoelectric vibrator is in a powered-on state, the second end of the piezoelectric vibrator drives the lens assembly to move toward or away from the image acquisition assembly through the friction between the second end of the piezoelectric vibrator and the bearing portion.

2. The camera module according to claim 1, characterized in that: The lens assembly comprises a lens body, a lens carrier, a carrying plate and an elastic member, wherein the lens body is fixedly connected to the lens carrier, an outer side wall of the lens carrier is provided with a mounting groove, and the mounting groove comprises: a first notch opposite to the inner wall of the support seat, and a first inner wall adjacent to the first notch; The piezoelectric vibrator, the supporting plate and the elastic member are respectively located in the mounting groove, and the elastic member is elastically compressed between the supporting plate and the first inner wall, the end surface of the supporting plate facing away from the elastic member abuts against the second end of the piezoelectric vibrator, and the supporting portion includes the end surface of the supporting plate facing away from the elastic member.

3. The camera module according to claim 2, characterized in that: The mounting slot further comprises a second notch, and the second notch is located on an end surface of the lens carrier away from the image acquisition assembly; The supporting plate is arranged perpendicular to the plane where the second notch is located, and one end of the supporting plate away from the second notch is fixedly connected to the inner wall of the mounting groove, and the elastic member is a V-shaped spring sheet, and the opening end of the spring sheet faces the second notch.

4. The camera module according to claim 1, characterized in that: The piezoelectric vibrator includes a first piezoelectric ceramic layer, an elastic plate, and a second piezoelectric ceramic layer which are stacked in sequence. The second end of the piezoelectric vibrator includes an end of the elastic plate facing the bearing portion, and the end of the elastic plate facing the bearing portion extends out of the first piezoelectric ceramic layer and the second piezoelectric ceramic layer.

5. The camera module according to claim 4, characterized in that: The first piezoelectric ceramic layer includes: 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 includes: a fourth region, a fifth region and a sixth region in sequence along the length direction of the piezoelectric vibrator, 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; When the piezoelectric vibrator is in a power-on state, the first region, the third region, the fourth region and the sixth region have the same polarization direction, the second region and the fifth region have the same polarization direction, and the first region and the second region have opposite polarization directions.

6. The camera module according to claim 4, characterized in that: The first end of the piezoelectric vibrator includes an end of the elastic plate away from the bearing portion, and the end of the elastic plate away from the bearing portion extends out of the first piezoelectric ceramic layer and the second piezoelectric ceramic layer.

7. The camera module according to claim 4, characterized in that: The camera module also includes a second circuit board, which includes a flexible circuit board. The flexible circuit board covers the outer surface of the first piezoelectric ceramic layer and the outer surface of the second piezoelectric ceramic layer, respectively, and the first piezoelectric ceramic layer and the second piezoelectric ceramic layer are respectively electrically connected to the first circuit board through the second circuit board.

8. The camera module according to claim 1, characterized in that: A wear-resistant layer is provided on the surface of the second end of the piezoelectric vibrator.

9. The camera module according to claim 2, characterized in that: 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 bottom of the accommodating groove to one side of the notch 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 groove extending along the movement direction of the lens assembly, and the support seat is provided with a second guide groove extending along the movement direction of the lens assembly, the notch of the first guide groove is opposite to the notch of the second guide groove, a ball is provided between the first guide groove and the second guide groove, and the ball is respectively abutted against the groove wall of the first guide groove and the groove wall of the second guide groove.

10. An electronic device, characterized in that: A camera module comprising any one of claims 1 to 9.

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