Piezoelectric camera actuator

Abstract

The utility model discloses a piezoelectric camera executor, including shell, set up in the control unit of shell, connect in the piezoelectric subassembly of shell and be located in the carrier of shell inner chamber and be worn on the piezoelectric subassembly, carrier includes an installation hole, and the elastic clamping component is fixed in the installation hole, and the elastic clamping component is clamped in the piezoelectric subassembly outer periphery, the piezoelectric subassembly is worn in the clamping space of elastic clamping component and is electrically connected with control unit, and control unit controls piezoelectric subassembly and produces mechanical deformation, and this deformation makes piezoelectric subassembly and elastic clamping component between the axial friction of producing to drive elastic clamping component along the axial reciprocating movement of shell, thereby drive carrier synchronous movement, drive carrier movement through the friction, need not additional gear, lead screw etc. transmission parts, simplify executor structure, the structure design of simple greatly reduced overall volume, more adapt to miniaturization equipment demand, reduce the number of parts, reduced assembly difficulty and cost.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment technology, and specifically relates to a piezoelectric camera actuator. Background Technology

[0002] With the increasing demand for miniaturization, high precision, and high stability in fields such as consumer electronics and drone aerial photography, piezoelectric camera actuators, as core components for lens focusing and image stabilization, directly affect the clarity and smoothness of captured images.

[0003] Currently, piezoelectric actuators used in the industry to achieve lens height adjustment generally rely on a "piezoelectric motor + complex transmission mechanism" technical approach. This involves generating power through an independent piezoelectric motor (such as an ultrasonic motor or a stacked piezoelectric motor), which is then transmitted to the lens carrier via gears, lead screws, universal joints, and other transmission components to achieve height adjustment. This approach is complex, involves cumbersome assembly processes, and results in redundant size, contradicting the need for miniaturized equipment. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a piezoelectric camera actuator.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A piezoelectric camera actuator includes a housing, a control unit disposed within the housing, a piezoelectric component connected within the housing, and a carrier disposed within the inner cavity of the housing and passing through the piezoelectric component. The carrier includes a mounting hole, in which an elastic clamping component is fixed, clamping the piezoelectric component around the periphery of the piezoelectric component. The piezoelectric component passes through the clamping space of the elastic clamping component and is electrically connected to the control unit. The control unit controls the piezoelectric component to generate directional mechanical deformation, which causes axial friction between the piezoelectric component and the elastic clamping component to drive the elastic clamping component to reciprocate along the axial direction of the housing, thereby causing the carrier to move synchronously.

[0006] Furthermore, the piezoelectric assembly includes a carbon rod with its top end connected to the outer shell, a piezoelectric element disposed at the lower end of the carbon rod, and a piezoelectric base connected to the lower end of the piezoelectric element. The piezoelectric element is connected to the control unit through a conductive sheet, and the lower end of the piezoelectric base is connected to the outer shell.

[0007] Furthermore, the elastic clamping assembly includes a rubber sleeve fitted into the mounting hole and a clamping mechanism sleeved within the rubber sleeve; the clamping mechanism encloses a clamping space for clamping the carbon rod.

[0008] Furthermore, the clamping mechanism includes two symmetrically arranged clamping plates. Each clamping plate includes a V-shaped clamping body that can contact the side wall of the rubber sleeve, a plurality of first ears fixed to the upper end of the clamping body and spaced apart, and two second ears located at the lower end of the clamping body and positioned corresponding to the first ears. The two V-shaped clamping bodies can enclose and form the clamping space. The connection between the first lug and the clamping body is rounded, and the first lug extends radially away from the center of the rubber sleeve and can be connected to the carrier. The second lug is arc-shaped and protrudes outside the rubber sleeve, and the free end of the second lug is far away from the carbon rod.

[0009] Furthermore, the carrier is provided with a position detection magnet that can move synchronously with the carrier, and the position detection magnet can cooperate with the control unit to realize the position detection of the carrier.

[0010] Furthermore, the upper end of the carrier is integrally formed with a plurality of test protrusions for reliability testing. All the test protrusions extend from the upper end of the carrier in a direction away from the carrier, and the test protrusions are distributed at intervals along the circumference of the carrier.

[0011] Furthermore, the housing includes a housing with mounting ports and a base detachably connected to the lower end of the housing. The control unit is mounted on the base via a bracket, and the base has a through opening coaxial with the mounting ports.

[0012] Furthermore, the base includes a base plate, a boss integrally protruding from the upper surface of the base plate in a direction away from the base plate to support the carrier, and a bracket fixed to one of the diagonal positions of the base plate. The upper surface of the boss is provided with a support column, and the position of the support column corresponds to the other diagonal position of the base plate. The control unit is a circuit board mounted on the bracket. When the housing is bonded to the base plate, the circuit board is partially exposed outside the housing.

[0013] The piezoelectric camera actuator also includes two guide members, which are diagonally distributed on both sides of the carrier along the axial direction of the housing. One end of each guide member is connected to the lower end of the housing, and the other end passes through the carrier and is connected to the upper end of the housing. The guide members are used to guide the carrier to move linearly back and forth along the axial direction of the housing.

[0014] Furthermore, all the guides are magnetic guides with magnetism, and one of the magnetic guides has a corresponding magnetic block on its side; the magnetic block is embedded in the carrier and distributed near the guide hole, and the magnetic block and the corresponding magnetic guide form a magnetic attraction.

[0015] In summary, the beneficial effects of this utility model are as follows: 1. Simplified structure, adapting to miniaturization requirements. It abandons the traditional piezoelectric motor + complex transmission mechanism mode, and uses direct friction drive of piezoelectric components + elastic clamping components, eliminating transmission parts such as gears and lead screws, significantly reducing the number of parts and simplifying the overall structure. The simplified structure makes the actuator more compact (especially in axial height), while reducing assembly processes, lowering production difficulty and overall cost. 2. Improved accuracy and response speed. The driving force of the piezoelectric component is directly transmitted to the elastic clamping component and carrier through a carbon rod. The power transmission path is short, reducing energy loss and errors during transmission, achieving high-precision micro-displacement control, and ensuring the accuracy of lens focusing and image stabilization. The direct drive design without intermediate transmission links improves the dynamic response speed of the actuator, allowing for rapid adaptation to high-frequency focusing and image stabilization scenarios, resulting in clearer and smoother shooting images. Third, the rubber sleeve of the elastic clamping assembly is made of elastic material, which balances the contradiction between "clamping to prevent slippage" and "preventing carbon rod damage" through adaptive clamping force; the line contact design of the V-shaped clamping body reduces wear and extends the service life of the carbon rod and clamping plate. The rounded corner design of the first ear and the anti-slip structure of the second ear both enhance the fatigue resistance and reliability of key components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a piezoelectric camera actuator provided by this utility model.

[0017] Figure 2 yes Figure 1 Exploded view.

[0018] Figure 3 yes Figure 1 Top view.

[0019] Figure 4 yes Figure 3 A sectional view along line AA.

[0020] Figure 5 This is a frontal projection view of the piezoelectric component and the elastic clamping component in the clamping state in this utility model.

[0021] Figure 6 This is a three-dimensional structural diagram of the clamping mechanism in this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of the carrier in this utility model, in which a piezoelectric component and an elastic clamping component are installed.

[0023] Figure 8 yes Figure 7 A schematic diagram showing the connection between the structure in the middle and the base.

[0024] In the diagram, 100-outer shell, 110-housing shell, 111-mounting port, 120-base, 121-base plate, 122-bore, 1220-support column, 123-bracket, 124-through port, 200-control unit, 210-Hall element, 300-piezoelectric assembly, 310-carbon rod, 320-piezoelectric element, 321-conductive sheet, 330-piezoelectric base, 400-carrier, 410-mounting hole, 420-test protrusion, 430-guide hole, 500-elastic clamping assembly, 510-rubber sleeve, 520-clamping mechanism, 521-clamping piece, 521A-clamping body, 521B-first ear, 521C-second ear, 522-clamping space, 600-position detection magnet, 700-guide, 800-magnetic block. Detailed Implementation

[0025] The present invention will be further illustrated below with reference to specific figures.

[0026] Please see Figures 1-4 This utility model provides a piezoelectric camera actuator, including a housing 100, a control unit 200 disposed within the housing 100, a piezoelectric component 300 connected within the housing 100, and a carrier 400 disposed within the inner cavity of the housing 100 and passing through the piezoelectric component 300. The carrier 400 includes a mounting hole 410, within which an elastic clamping component 500 is fixed, clamping the piezoelectric component 300 to the outer periphery. The piezoelectric component 300 passes through the clamping space 522 of the elastic clamping component 500 and is electrically connected to the control unit 200. The control unit 200 controls the piezoelectric component 300 to generate directional mechanical deformation, which causes axial friction between the piezoelectric component 300 and the elastic clamping component 500 to drive the elastic clamping component 500 to reciprocate along the axial direction of the housing 100, thereby causing the carrier 400 to move synchronously. The piezoelectric component 300 directly engages with the elastic clamping component 500, driving the carrier 400 to move via friction. This eliminates the need for additional gears, lead screws, or other transmission components, simplifying the actuator structure. The simplified design significantly reduces the overall size, making it more suitable for miniaturized equipment, reducing the number of parts, and lowering assembly difficulty and cost. The driving force of the piezoelectric component 300 is directly transmitted to the carrier 400, reducing energy loss and errors during transmission, improving position control accuracy. The simplified transmission path makes the driving force transmission more direct, enhancing the actuator's response speed.

[0027] Please continue reading. Figure 2The outer casing 100 includes a housing 110 with mounting openings 111 and a base 120 screwed or glued to the lower end of the housing 110. The base 120 includes a base plate 121, a boss 122 integrally protruding from the upper surface of the base plate 121 in a direction away from the base plate 121 to support the carrier 400, and a bracket 123 fixed to one diagonal position of the base plate 121. The base 120 has a through opening 124 coaxial with the mounting openings 111, which penetrates the base plate 121 and the boss 122 to ensure that light can pass through unobstructed during lens shooting without affecting the realization of the camera function.

[0028] Please continue reading. Figure 2 A support column 1220 is provided on the upper surface of the boss 122, and the position of the support column 1220 corresponds to the other diagonal position of the base plate 121. This not only cleverly avoids the installation space of the carrier 400 and the piezoelectric component 300, but also significantly improves the structural strength and stability of the base 120 and even the entire actuator.

[0029] The control unit 200 is a circuit board mounted on the bracket 123. After the housing 110 is bonded to the base plate 121, part of the circuit board is exposed outside the housing 100, which facilitates the wiring of the circuit board to external devices or heat dissipation.

[0030] Please see Figure 5 The piezoelectric component 300 includes a carbon rod 310 connected to the housing 110 at its top, a piezoelectric element 320 located at the lower end of the carbon rod 310, and a piezoelectric base 330 connected to the lower end of the piezoelectric element 320. The piezoelectric element 320 is connected to the control unit 200 via a conductive sheet 321. When an electrical signal is input from the control unit 200, the crystal structure inside the piezoelectric element 320 rearranges under the influence of the electric field, thus spontaneously generating a shape change. Once the electrical signal disappears or reverses, the deformation will also recover or reverse, without the need for additional mechanical force. This is the core characteristic of piezoelectric materials (the inverse effect of the piezoelectric effect). The mechanical deformation generated by the piezoelectric element 320 is directly transmitted through the carbon rod 310, which is closely connected to it. The carbon rod 310 serves as the direct output end of the driving force, resulting in a short power transmission path and reducing energy losses such as friction and meshing in complex transmission processes. This ensures that the actuator can achieve high-precision micro-displacement control, which is crucial for the focusing and image stabilization functions of the lens.

[0031] The lower end of the piezoelectric base 330 is connected to the base 120. The stable support of the piezoelectric base 330 helps to increase the resonant frequency of the entire piezoelectric assembly 300, enabling it to operate stably at a higher frequency and thus achieving faster operating speeds. The elimination of intermediate transmission components such as gears and lead screws significantly reduces the number of parts, lowering assembly complexity and cost. The simplified structure allows for a very compact overall size of the actuator, especially its axial height, meeting the requirements for equipment miniaturization.

[0032] Please continue reading. Figure 5 and Figure 2 The elastic clamping assembly 500 includes a rubber sleeve 510 fitted into a mounting hole 410 and a clamping mechanism 520 fitted into the rubber sleeve 510. The rubber sleeve 510 is made of an elastic material (such as rubber, silicone, etc.) and is circular. It is fitted entirely into the pre-set mounting hole 410, and the outer peripheral wall of the rubber sleeve 510 is tightly fitted with the inner wall of the mounting hole 410 to form a fixed support base. Its interior is provided with an assembly structure (such as an annular groove) adapted to the clamping mechanism 520, which generates radial clamping force through its own elastic deformation. The clamping mechanism 520 encloses and forms a clamping space 522 for clamping the carbon rod 310. The rubber sleeve 510, made of elastic materials such as rubber and silicone, has a radial clamping force that is "deformable and adjustable". When the carbon rod 310 is inserted into the clamping space 522, the rubber sleeve 510 will adaptively adjust the clamping force according to the slight displacement of the clamping mechanism 520. This can not only avoid scratches and cracks on the surface of the carbon rod 310 caused by rigid clamping (especially for brittle carbon rods 310), but also ensure that the carbon rod 310 does not loosen during use through continuous elastic rebound force. This solves the contradiction between "insufficient clamping force is easy to fall off" and "excessive clamping force is easy to damage".

[0033] Please see Figure 6The clamping mechanism 520 includes two symmetrically arranged clamping plates 521. Each clamping plate 521 includes a V-shaped clamping body 521A that can contact the side wall of the rubber sleeve 510, a plurality of first ears 521B fixed to the upper end of the clamping body 521A and spaced apart, and two second ears 521C located at the lower end of the clamping body 521A and corresponding to the first ears 521B. The two V-shaped clamping bodies 521A can close together to form a clamping space 522. The rubber sleeve 510, through its own elastic deformation, generates a radial clamping force that continuously acts on the outer periphery of the clamping mechanism 520, driving the two clamping plates 521 to converge toward the center of the clamping space 522, thereby achieving elastic clamping of the carbon rod 310. The piezoelectric element 320 has piezoelectric characteristics and, after receiving the electrical signal from the control unit 200, will immediately When mechanical deformation occurs, the deformation of the piezoelectric element 320 will drive the carbon rod 310 to extend or contract synchronously. When the piezoelectric element 320 drives the carbon rod 310 to extend (or contract), the clamping piece 521 is tightly attached to the carbon rod 310 due to the clamping force of the rubber sleeve 510. The rigid clamping piece 521 will generate friction with the surface of the carbon rod 310 in the direction of movement of the carbon rod 310. The friction force is converted into a "pushing / pulling" force on the carbon rod 310. At the same time, the piezoelectric element 320 will repeatedly "extend-contract" under the action of electrical signal, which can make the carbon rod 310 produce obvious and continuous linear motion, and finally realize the effective output of driving force. After the carbon rod 310 produces linear motion under the drive of friction, it will directly drive the carrier 400 associated with it to move up and down, and complete the height adjustment of the lens connected to it.

[0034] The V-shaped clamping body 521A and the circular carbon rod 310 use line contact instead of surface contact, significantly reducing the contact area between them. On the one hand, this avoids excessive static friction during surface contact, which could cause scratches and wear on the surface of the carbon rod 310 during loading and unloading (especially for carbon rods with easily damaged surfaces). On the other hand, moderate friction ensures that the carbon rod 310 does not loosen during operation and makes the loading and unloading process smoother, without the need to apply excessive external force, further improving the ease of operation in scenarios with frequent changes. The two contact surfaces of the V-shaped structure can precisely fit with the outer circumference of the circular carbon rod 310, forming a two-point support line contact. Compared with surface contact, this can more evenly transmit the radial clamping force of the rubber sleeve 510, preventing the carbon rod 310 from shifting due to uneven force.

[0035] Please see Figure 7The first lug 521B extends radially away from the center of the rubber sleeve 510 and connects to the carrier 400, forming an outwardly protruding connection structure. It is preferably fixed to the carrier 400 by adhesive bonding, screws, or clips. This design avoids the clamping space 522 inside the rubber sleeve 510 (without affecting the clamping of the carbon rod 310) while utilizing the external space of the carrier 400 for a reliable connection. The connection between the first lug 521B and the clamping body 521A uses a rounded corner transition. This connection is a critical part of the structure's stress (especially when the elastic clamping component 500 reciprocates with the carrier 400, this area will repeatedly endure tension and vibration). If a right-angle transition is used, stress will concentrate at the right-angle edge, potentially leading to fatigue cracking over long-term use; the rounded corner design, through an arc transition, can evenly distribute stress over a larger area, avoiding excessive local stress.

[0036] The second lug 521C is arc-shaped and protrudes outside the rubber sleeve 510. The free end of the second lug 521C is far away from the carbon rod 310. When the clamping piece 521 is inserted into the rubber sleeve 510, the exposed arc-shaped second lug 521C will form a physical block with the inner edge of the rubber sleeve 510, effectively restricting the movement of the clamping piece 521 along the axial direction of the carbon rod 310 (i.e., the lens extension direction), and preventing it from sliding out of the rubber sleeve 510 under long-term movement or external force.

[0037] Please see Figure 8 The carrier 400 is equipped with a position detection magnet 600 that moves synchronously with the carrier 400. The position detection magnet 600 cooperates with the Hall element 210 on the control unit 200 to realize the position detection of the carrier 400. The position detection magnet 600 moves synchronously with the carrier 400, generating a magnetic field change related to displacement; the Hall element 210 on the control unit 200 can accurately sense this change, convert the magnetic field signal into an electrical signal, and inform the control unit 200 of the current position of the carrier 400 in real time, providing real-time position feedback and eliminating blind adjustment. There is no physical contact between the position detection magnet 600 and the Hall element 210, so there is no friction or mechanical wear, which can reduce component wear and significantly extend the service life of the actuator, making it especially suitable for scenarios requiring frequent focusing / image stabilization.

[0038] Please continue reading. Figure 7The upper and lower surfaces of the carrier 400 are integrally formed with several test protrusions 420 for reliability testing. Each test protrusion 420 extends from the upper surface of the carrier 400 away from the carrier 400, and the protrusions 420 are spaced apart circumferentially along the carrier 400. The test protrusions 420 can serve as stress points for applying or positioning external forces, such as for vibration testing by clamping the protrusions with fixtures, or for transmitting impact loads, accurately verifying the structural stability of the carrier 400 under high-frequency movement (when the piezoelectric component 300 is working) and assembly stress. The test protrusions 420 are located away from core areas on the carrier 400 such as the mounting cavity, guide hole 430, and magnet mounting position. External forces act directly on the test protrusions 420 rather than functional surfaces, preventing scratches, deformation, or damage to critical structures related to lens mounting and power transmission during testing. If the test is passed, it ensures that the product can still function normally after the test.

[0039] Please continue reading. Figure 7 and Figure 8 During the movement of the carrier 400, the actuator also includes two guide members 700. The two guide members 700 are diagonally distributed on both sides of the carrier 400 along the axial direction of the housing 100, constraining the carrier 400 from two diagonal positions to form a stable two-point support. This layout can significantly improve the torsional stiffness and attitude stability of the carrier 400 during movement. Even if it is disturbed by the external force of the piezoelectric component 300, it can maintain smooth movement without tilting or "jamming".

[0040] One end of the guide component 700 is connected to the base 120, and the other end passes through the carrier 400 and is bonded to the housing 110. The guide component 700 is used to guide the carrier 400 to move linearly back and forth along the axial direction of the housing 100. All guide components 700 are magnetic guide components 700. Please refer to [further details]. Figure 8 One of the magnetic guide components 700 has a corresponding magnetic block 800 on its side. The magnetic block 800 is embedded in the carrier 400 and distributed near the guide hole 430, and forms a magnetic attraction between the magnetic block 800 and the corresponding magnetic guide component 700. A small gap inevitably exists between the guide component 700 and the guide hole 430 of the carrier 400, which can easily cause slight shaking or displacement of the carrier 400 during movement. The magnetic attraction between the magnetic block 800 and the magnetic guide component 700 generates a continuous radial preload, firmly adhering the carrier 400 to one side of the guide component 700, completely eliminating the "playback" caused by the gap, and ensuring that the carrier 400 moves axially without shaking or displacement. The stable constraint formed by the magnetic attraction further restricts the displacement of the carrier 400, ensuring that the carrier 400 always moves in a strictly linear manner along the axis of the outer shell 100. This is crucial for lens focusing and image stabilization, avoiding image blur and image shake caused by motion deviation, and directly improving shooting accuracy.

[0041] This piezoelectric camera actuator features: 1. Simplified structure, adapting to miniaturization requirements. It abandons the traditional piezoelectric motor + complex transmission mechanism, instead using direct friction drive via the piezoelectric component 300 and the elastic clamping component 500. This eliminates gears, lead screws, and other transmission components, significantly reducing the number of parts and simplifying the overall structure. The simplified structure makes the actuator more compact (especially in axial height), while also reducing assembly steps, lowering production difficulty and overall cost. 2. Improved accuracy and response speed. The driving force of the piezoelectric component 300 is directly transmitted to the elastic clamping component 500 and the carrier 400 via the carbon rod 310. The short power transmission path reduces energy loss and errors during transmission, achieving high-precision micro-displacement control and ensuring accurate lens focusing and image stabilization. The direct drive design without intermediate transmission links improves the actuator's dynamic response speed, allowing for rapid adaptation to high-frequency focusing and image stabilization scenarios, resulting in clearer and smoother footage. Third, the rubber sleeve 510 of the elastic clamping assembly 500 is made of elastic material, which balances the contradiction between "clamping to prevent slippage" and "preventing damage to the carbon rod 310" through adaptive clamping force; the line contact design of the V-shaped clamping body 521A reduces wear and extends the service life of the carbon rod 310 and the clamping plate 521. The rounded corner design of the first ear 521B and the anti-slip structure of the second ear 521C both enhance the fatigue resistance and reliability of key components.

[0042] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A piezoelectric camera actuator, characterized in that: The device includes a housing, a control unit disposed within the housing, a piezoelectric component connected within the housing, and a carrier disposed within the inner cavity of the housing and passing through the piezoelectric component. The carrier includes a mounting hole, in which an elastic clamping component is fixed, clamping the piezoelectric component around the periphery of the piezoelectric component. The piezoelectric component passes through the clamping space of the elastic clamping component and is electrically connected to the control unit. The control unit controls the piezoelectric component to generate directional mechanical deformation, which causes axial friction between the piezoelectric component and the elastic clamping component to drive the elastic clamping component to reciprocate along the axial direction of the housing, thereby causing the carrier to move synchronously.

2. The piezoelectric camera actuator according to claim 1, characterized in that: The piezoelectric assembly includes a carbon rod with its top end connected to the outer shell, a piezoelectric element disposed at the lower end of the carbon rod, and a piezoelectric base connected to the lower end of the piezoelectric element. The piezoelectric element is connected to the control unit through a conductive sheet, and the lower end of the piezoelectric base is connected to the outer shell.

3. The piezoelectric camera actuator according to claim 2, characterized in that: The elastic clamping assembly includes a rubber sleeve fitted into the mounting hole and a clamping mechanism fitted into the rubber sleeve; the clamping mechanism encloses a clamping space for clamping the carbon rod.

4. The piezoelectric camera actuator according to claim 3, characterized in that: The clamping mechanism includes two symmetrically arranged clamping plates. Each clamping plate includes a V-shaped clamping body that can contact the side wall of the rubber sleeve, a plurality of first ears fixed to the upper end of the clamping body and spaced apart, and two second ears located at the lower end of the clamping body and corresponding to the first ears. The two V-shaped clamping bodies can enclose and form the clamping space. The connection between the first lug and the clamping body is rounded, and the first lug extends radially away from the center of the rubber sleeve and can be connected to the carrier. The second lug is arc-shaped and protrudes outside the rubber sleeve, and the free end of the second lug is far away from the carbon rod.

5. The piezoelectric camera actuator according to claim 2, characterized in that: The carrier is equipped with a position detection magnet that can move synchronously with the carrier. The position detection magnet can cooperate with the control unit to realize the position detection of the carrier.

6. The piezoelectric camera actuator according to claim 2, characterized in that: The upper end of the carrier is integrally formed with a plurality of test protrusions for reliability testing. All the test protrusions protrude from the upper end of the carrier in a direction away from the carrier, and the test protrusions are distributed at intervals along the circumference of the carrier.

7. The piezoelectric camera actuator according to claim 1, characterized in that: The housing includes a housing with mounting ports and a base detachably connected to the lower end of the housing. The control unit is mounted on the base via a bracket, and the base has a through opening coaxial with the mounting ports.

8. The piezoelectric camera actuator according to claim 7, characterized in that: The base includes a base plate, a boss integrally protruding from the upper surface of the base plate in a direction away from the base plate to support the carrier, and a bracket fixed to one of the diagonal positions of the base plate. The upper surface of the boss is provided with a support column, and the position of the support column corresponds to the other diagonal position of the base plate. The control unit is a circuit board mounted on the bracket. When the housing is bonded to the base plate, the circuit board is partially exposed outside the housing.

9. The piezoelectric camera actuator according to any one of claims 1-8, characterized in that: It also includes two guide members, which are diagonally distributed on both sides of the carrier along the axial direction of the outer shell. One end of each guide member is connected to the lower end of the outer shell, and the other end passes through the carrier and is connected to the upper end of the outer shell. The guide members are used to guide the carrier to move back and forth in a straight line along the axial direction of the outer shell.

10. The piezoelectric camera actuator according to claim 9, characterized in that: All the guide components are magnetic guide components with magnetism, and a magnetic block is provided on the side of one of the magnetic guide components; the magnetic block is embedded in the carrier and distributed near the guide hole, and the magnetic block and the corresponding magnetic guide component form a magnetic attraction.

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