A driving device, a camera module and its assembly method

Abstract

This application discloses a driving device, a camera module, and an assembly method thereof, belonging to the field of camera modules. A driving device includes a movable part, a fixed part, a piezoelectric actuator, a pre-pressure member, and a pressure block. The movable part carries an optical lens, which defines an optical axis. The movable part is movably disposed within the fixed part. The piezoelectric actuator is in frictional contact with the top of the movable part and drives the movable part to move along the optical axis. The pre-pressure member is disposed on the top of the piezoelectric actuator and applies a pre-pressure perpendicular to the optical axis to the movable part. The pressure block is coupled to the pre-pressure member and is designed to be installed from the top of the fixed part, providing a deformable preset space for the pre-pressure member. The driving device, camera module, and assembly method provided by this application have the advantages of easy assembly, prevention of optical lens tipping, and improved imaging stability of the camera module.

Description

Technical Field

[0001] This application relates to the field of camera modules, specifically to a driving device, a camera module, and an assembly method thereof. Background Technology

[0002] Currently, as electronic devices continue to evolve towards miniaturization and high performance, camera modules, as a standard component of electronic devices, are facing increasingly stringent user demands for both small size and high imaging capabilities. To further enhance user experience, the industry is actively working on compact design and functional integration improvements for camera modules. Through technological innovation and functional integration, the industry is continuously driving the development of camera modules towards greater compactness and intelligence, further realizing functions such as autofocus, zoom, image stabilization, and telephoto capabilities.

[0003] A periscope camera module is a special type of camera module that uses an optical path deflector to change the path of light, allowing it to be placed horizontally in electronic devices such as mobile phones. This solves the problem of excessively tall telephoto camera modules caused by the excessive optical length of telephoto lenses. This design allows the camera to provide a longer focal length and higher zoom capability without increasing the module thickness. Summary of the Invention

[0004] One objective of this application is to provide a driving device, a camera module, and an assembly method thereof, which, by driving from the top of the moving part, helps to improve assembly consistency and contact flatness, and reduces tilting and consistency problems caused by assembly errors.

[0005] Another objective of this application is to provide a driving device, a camera module, and an assembly method thereof, which helps to prevent the optical lens from tipping over and further enhances the stability of the optical lens.

[0006] Another objective of this application is to provide a driving device, a camera module, and an assembly method thereof, which simplifies the assembly process of the camera module, reduces the assembly difficulty, and further shortens the production time.

[0007] To achieve the above objectives, the technical solution adopted in this application is a driving device for a periscope camera module, comprising:

[0008] The movable part is used to support an optical lens, which defines an optical axis;

[0009] A fixed part, wherein the movable part is movably disposed within the fixed part;

[0010] A piezoelectric actuator, which makes frictional contact with the top of the movable part, is used to drive the movable part to move along the optical axis.

[0011] A preload element is disposed on the top of the piezoelectric actuator and applies a preload perpendicular to the optical axis to the moving part;

[0012] A pressure block, coupled to the pre-compression member, is designed to be installed from the top of the fixing part and to provide a preset space for deformation of the pre-compression member.

[0013] The pressure block can simplify the assembly process, improve the consistency and stability of the camera module, adjust the pre-pressure of the pre-pressure component, and protect the pre-pressure component.

[0014] As a preferred embodiment, the movable part includes a first movable sidewall located on a first side and a second movable sidewall located on a second side, wherein the pressure block, the pre-pressure member, and the piezoelectric actuator are sequentially located above the first movable sidewall along a second direction, wherein the second direction is perpendicular to the optical axis direction.

[0015] As a preferred embodiment, the pressure block includes a lower pressure beam and two lower pressure arms, with the two lower pressure arms located at both ends of the lower pressure beam. The pressure block is installed on the fixing part by fixing the two lower pressure arms to the fixing part. The bottom surface of the lower pressure arms is lower than the bottom surface of the lower pressure beam. A groove is formed between the lower pressure beam and the two lower pressure arms, and the groove provides deformation space for the pre-pressed component.

[0016] As a preferred embodiment, each of the lowering arms includes a lowering mounting platform and a lowering fixing platform. The two lowering fixing platforms of the two lowering arms are located outside the two lowering mounting platforms along the optical axis direction. The distance between the two lowering fixing platforms along the second direction is greater than the distance between the two lowering mounting platforms along the second direction. The groove is formed between the two lowering mounting platforms and the lowering crossbeam. The pre-compression member is installed on the two lowering mounting platforms, and the two lowering fixing platforms are respectively fixed to the fixing part.

[0017] As a preferred embodiment, the pressing mounting platforms of the two pressing arms are respectively spaced apart from the fixing part, and there is a gap between the two pressing mounting platforms and the fixing part.

[0018] As a preferred embodiment, when viewed along the optical axis, the lowering crossbeam is spaced apart from the first movable sidewall of the movable part, and the lowering arm is spaced apart from the first movable sidewall of the movable part.

[0019] As a preferred embodiment, the device further includes a first support portion disposed between the fixed portion and the movable portion along a second direction. The top and bottom of the first movable sidewall of the movable portion maintain frictional contact with the piezoelectric actuator and the first support portion, respectively. The first support portion provides a supporting force to the movable portion along the second direction. The pre-pressing member deforms under the action of the pressing block and the first support portion to generate the pre-pressure along the second direction, wherein the direction of the pre-pressure is opposite to the direction of the supporting force.

[0020] As a preferred embodiment, the dimension of the pressure block along the optical axis is larger than the dimension of the first support portion along the optical axis; in the optical axis direction, the projection of the first support portion along the second direction is entirely within the projection range of the pressure block along the second direction.

[0021] As a preferred embodiment, the fixing part includes a first fixing sidewall located on a first side, a second fixing sidewall located on a second side, and a fixing body connecting the first fixing sidewall and the second fixing sidewall. The bottom surface of the first movable sidewall is provided with a first guide groove, and the bottom of the first fixed sidewall is provided with a first guide rail. The first support part is installed between the first guide groove and the first guide rail. The dimension of the pressure block along the optical axis is larger than the dimension of the first guide groove along the optical axis, and in the optical axis direction, the projection of the first guide groove along the second direction is entirely within the projection range of the pressure block along the second direction.

[0022] As a preferred embodiment, the piezoelectric actuator includes a piezoelectric active part and a friction head connected to each other, and the friction head maintains frictional contact with the first movable sidewall under the action of the pre-pressure member; wherein, the position of the friction head acting on the first movable sidewall is aligned with the cross-sectional center of the first support part in a second direction.

[0023] To achieve one of the objectives of this application, the technical solution adopted in this application is a camera module, which includes:

[0024] Any of the above-mentioned driving devices;

[0025] Optical deflector element used to deflect incident light rays

[0026] An optical lens, wherein the optical lens is held on the light-reversing path of the light-reversing element;

[0027] A photosensitive component for receiving light from the optical lens.

[0028] To achieve one of the objectives of this application, the technical solution adopted in this application is a method for assembling a drive device, which includes the following steps:

[0029] S1. Provide a fixing part;

[0030] S2. A movable part is provided, which is movably installed in the fixed part, wherein the movable part is used to carry an optical lens, the optical lens defining an optical axis;

[0031] S3. Provide a piezoelectric actuator, a pre-pressing component, and a pressing block; assemble the piezoelectric actuator, the pre-pressing component, and the pressing block to form a pre-pressing drive assembly, wherein the pre-pressing component is disposed between the piezoelectric actuator and the pressing block, the piezoelectric actuator is mounted on the pre-pressing component, the pressing block is coupled to the pre-pressing component, and provides a deformable preset space for the pre-pressing component;

[0032] S4. Install the preload drive assembly onto the fixed part in a direction perpendicular to the optical axis and position the drive assembly on top of the movable part.

[0033] As a preferred embodiment, step S3 further includes the following steps:

[0034] S31. First, the pre-compression component is coupled to the pressure block, and then the piezoelectric actuator is installed on the pre-compression component to form the pre-compression drive assembly. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the camera module structure in some embodiments of this application.

[0036] Figure 2 This is a schematic diagram of the exploded structure of the camera module in some embodiments of this application.

[0037] Figure 3 This is a schematic diagram of the exploded structure of the driving device in some embodiments of this application.

[0038] Figure 4 This is a schematic diagram of the exploded structure of the camera module in some other embodiments of this application.

[0039] Figure 5 This is a cross-sectional structural diagram of the driving device in the optical axis direction and the second direction in some embodiments of this application.

[0040] Figure 6 This is a cross-sectional structural diagram of the driving device in the optical axis direction and the second direction in some other embodiments of this application.

[0041] Figure 7 This is a schematic cross-sectional view of the camera module in the first and second directions in some embodiments of this application.

[0042] Figure 8 This is a bottom view of the camera module structure in some embodiments of this application.

[0043] Figure 9 This is a bottom view of the camera module structure in some other embodiments of this application.

[0044] Figure 10 This is a bottom view of the camera module structure in some embodiments of this application.

[0045] Figure 11 for Figure 6 A schematic diagram of the assembly process of the first support part, the second support part, and the fixing part of the driving device in the embodiment shown.

[0046] Figure 12 for Figure 6 A schematic diagram of the assembly process of the moving part of the drive device in the illustrated embodiment.

[0047] Figure 13 for Figure 6 The diagram shows the assembly process of the piezoelectric actuator and pre-pressing component of the drive device in the embodiment shown.

[0048] Figure 14 for Figure 6 The diagram shows the assembly process of the pressure block and pre-pressing component of the driving device in the embodiment shown.

[0049] Figure 15 This is an exploded view of the upper cover and fixing part of the driving device in a modified embodiment of this application.

[0050] Figure 16 This is an exploded view of the drive device after the top cover has been removed in a modified embodiment of this application.

[0051] Figure 17 This is a top view of the piezoelectric actuator, pre-compression component, and pressure block of the driving device in a modified embodiment of this application.

[0052] Figure 18 This is a bottom view of the piezoelectric actuator, pre-compression component, and pressure block of the driving device in a modified embodiment of this application.

[0053] Figure 19 This is a cross-sectional structural diagram of the driving device in the optical axis direction and the second direction in a modified embodiment of this application.

[0054] Figure 20 This is a cross-sectional structural diagram of the driving device in a first direction in a modified embodiment of this application.

[0055] Figure 21 This is a cross-sectional view of the driving device in a modified embodiment of this application in the second direction.

[0056] Figure 22 This is a bottom view of the movable part of the drive device in a modified embodiment of this application.

[0057] In the figure: 10. Fixing part; 11. First fixing sidewall; 111. First guide rail; 112. First receiving groove; 113. Second receiving groove; 114. Base extension; 1141. Second mounting plane; 12. Fixing body; 13. Second fixing sidewall; 131. Second guide rail; 14. Conductor; 141. Conducting part; 20. Movable part; 21. First movable sidewall; 211. First guide groove; 22. Friction part; 23. Second movable sidewall; 231. Second guide groove; 30. Piezoelectric actuator; 31. Piezoelectric active part; 32. Friction head; 33. Conductive part; 331. First connecting part; 333. Second connecting part; 334. Conductive part; 34. Buffer; 40. Pre-compression part; 41. Fixing end; 411 42. Fixing hole; 43. Elastic part; 50. Bending part; 51. Pressure block; 52. Lower pressure beam; 53. Lower pressure arm; 54. Lower pressure fixing platform; 55. Lower pressure mounting platform; 56. First mounting plane; 57. Mounting column; 58. Groove; 69. First support part; 60. Second support part; 71. Magnetic suction assembly; 72. First magnetic suction element; 73. Base part; 74. Support part; 75. Second magnetic suction element; 80. Photosensitive assembly; 90. Light conversion element; 100. Optical lens; 115. First side wall body; 3331. First sub-connecting part; 3332. Second sub-connecting part; 335. Molded part; 412. Hole; 421. Connecting hole; 44. Intermediate connecting part; 45. Connecting column; 520. Gap; 53. Structural reinforcement; 110. Drive control assembly; 1101. Sensing magnet; 1102. Sensing chip; 120. Top cover. Detailed Implementation

[0058] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0059] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0060] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0061] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0062] According to one aspect of this application, a driving device for a camera module is provided, such as... Figures 1 to 22 As shown, this drive device can be applied to camera modules, especially periscope camera modules that require significant motor driving force. Further, the drive device includes a movable part 20, a fixed part 10, a piezoelectric actuator 30, a pre-pressure member 40, and a pressure block 50. The movable part 20 carries an optical lens 100, which defines an optical axis. The movable part 20 is movably disposed within the fixed part 10, driving the optical lens 100 to move relative to the fixed part 10, thereby enabling focusing and zooming functions. Further, the piezoelectric actuator 30 makes frictional contact with the top of the movable part 20, driving the movable part 20 to move along the optical axis. Further, the pre-pressure member 40 is disposed on the top of the piezoelectric actuator 30 and applies a pre-pressure perpendicular to the optical axis to the movable part 20. Specifically, the pressure block 50 is fixed to the fixing part 10 and coupled to the pre-compression member 40. The pressure block 50 is designed to be installed on the fixing part 10 from the top and provides a deformable preset space for the pre-compression member 40. By driving from the top of the moving part 20, this application helps to improve assembly consistency and contact flatness, prevents the optical lens 100 from tipping over, reduces tilting and consistency problems in the periscope camera module, and simplifies assembly difficulty.

[0063] Among them, such as Figure 1 As shown, the optical lens 100 defines an optical axis perpendicular to a first direction and a second direction. Specifically, the first direction is defined as the width direction of the periscope camera module along the Y-axis, the second direction is defined as the height direction of the periscope camera module along the Z-axis, and the optical axis direction is defined as the length direction of the periscope camera module along the X-axis. It is understood that this coordinate system setting also applies to other modified embodiments of this application.

[0064] In some embodiments, the piezoelectric actuator 30 is disposed on top of at least a portion of the movable part 20 along a second direction, and at least a portion of the pre-pressure member 40 is clamped between the piezoelectric actuator 30 and the pressure block 50 along the second direction. The pressure block 50 controls the deformation of the pre-pressure member 40 to generate a pre-pressure along the second direction. The piezoelectric actuator 30 and the movable part 20 abut against each other under the action of the pre-pressure, wherein the second direction is perpendicular to the optical axis direction. Since the pre-pressure member 40 and the pressure block 50 are disposed above the height direction of the camera module along the Z-axis, and the pressure block 50 is coupled to the pre-pressure member 40, and the pressure block 50 is designed to be installed from the top onto the fixed part 10 for assembly, the assembly process of the camera module is simplified, further reducing the tilting phenomenon of the movable part 20 and the poor consistency of the camera module caused by assembly errors, thereby improving the imaging stability of the camera module. Furthermore, the pressure block 50 can also adjust the degree of deformation of the pre-pressure member 40 to adjust the magnitude of the pre-pressure, thereby improving the performance of the drive device. Furthermore, the pressure block 50 can also protect the pre-compression component 40, preventing the pre-compression component 40 from interfering with other components in the drive device during deformation, thereby affecting the performance of the pre-compression component 40.

[0065] refer to Figure 2 , Figure 3 , Figure 15 and Figure 16 As can be seen, in some embodiments, the piezoelectric actuator 30 includes a piezoelectric active part 31 and a friction head 32 connected to each other. Due to the pre-pressure applied downward in the second direction by the pre-pressure member 40 to the piezoelectric actuator 30, the movable part 20 and the friction head 32 in the piezoelectric actuator 30 are kept in constant frictional contact. This facilitates the movement of the movable part 20 along the optical axis after the piezoelectric active part 31 receives voltage, reducing the shaking and tilting of the optical lens 100 during the driving process, thereby improving the imaging accuracy and stability of the camera module during autofocus. It is understood that by keeping the movable part 20 and the friction head 32 in mutual contact, the movable part 20 can move smoothly and quickly when driven, further improving the response speed of the movable part 20 to the piezoelectric actuator 30 and shortening the time spent during focusing. Furthermore, while improving the driving force provided by the piezoelectric actuator 30, it also enhances the stability of the camera module, reduces image jitter, and thus improves image quality.

[0066] In some examples, viewed along the second direction, the friction head 32 is located in the middle of the preload member 40 along the optical axis. This allows the preload exerted by the preload member 40 on the friction head 32 to be as symmetrical as possible relative to the friction head 32, thereby making the drive of the piezoelectric actuator 30 more stable and reducing the risk of tilting. It should be understood that regardless of whether there is one, two, or more friction heads 32, the aforementioned "friction head 32 is located in the middle of the preload member 40" means that all friction heads 32 are located in the middle of the preload member 40. The middle portion refers to the intermediate region along the optical axis, away from both ends.

[0067] In some examples, viewed along the second direction, the piezoelectric active part 31 is located in the middle of the preload member 40 in the optical axis direction. In this way, the preload force exerted by the preload member 40 on the piezoelectric active part 31 can be as symmetrical as possible with respect to the piezoelectric active part 31, thereby making the drive of the piezoelectric actuator 30 more stable and reducing the risk of tilting.

[0068] In some examples, viewed along the second direction, the preload 40 is located in the middle of the pressure block 50 in the optical axis direction, so that the preload 40 can produce as symmetrical deformation as possible within the pressure block 50, thereby generating as symmetrical preload as possible, to improve the stability and reliability of the drive device.

[0069] refer to Figure 5 , Figure 6 and Figure 19 As can be seen, in some embodiments, the fixing part 10 is provided with a first receiving groove 112 and a second receiving groove 113. The first receiving groove 112 and the second receiving groove 113 are opened along the second direction on the same side of the fixing body 12. The first receiving groove 112 is connected to the upper part of the second receiving groove 113. The pressure block 50 is disposed in the first receiving groove 112, and one side of the movable part 20 is accommodated in the second receiving groove 113. The dimension of the first receiving groove 112 along the optical axis is larger than the dimension of the second receiving groove 113 along the optical axis. Specifically, since the length dimension of the first receiving groove 112 along the optical axis is larger than the length dimension of the second receiving groove 113 along the optical axis, the pressure block 50 accommodated in the first receiving groove 112 can be fixed to the fixing part 10, further increasing the stability and reliability of the pressure block 50. Furthermore, the pressure block 50 is placed in the first receiving groove 112, the movable part 20 is placed in the second receiving groove 113, and the pre-pressing member 40 and the piezoelectric actuator 30 are sequentially arranged between the pressure block 50 and the movable part 20, making the structure more compact and increasing the space utilization rate inside the camera module.

[0070] It is understood that the length of the second receiving groove 113 along the optical axis is greater than the length of the movable part 20 along the optical axis, thereby providing space for at least a portion of the movable part 20 to move along the optical axis within the second receiving groove 113 when driven by the piezoelectric actuator 30.

[0071] Continue to combine Figure 19 As shown, in a modified embodiment of this application, the first receiving groove 112 is a stepped groove, and the first receiving groove 112 has a shape that is larger at the top and smaller at the bottom along the second direction, that is, the dimension of the end of the first receiving groove 112 away from the second receiving groove 113 in the optical axis direction is larger than the dimension of the end of the first receiving groove 112 near the second receiving groove 113 in the optical axis direction. The pressure block 50 is disposed in the first receiving groove 112 and fixed within the first receiving groove 112. Accordingly, further combined with Figure 17 and Figure 18 As shown, in this example, the pressure block 50 includes a lower pressure beam 51 and two lower pressure arms 52. The two lower pressure arms 52 are located at both ends of the lower pressure beam 51. The pressure block 50 is installed on the fixing part 10 by fixing the two lower pressure arms 52 to the fixing part 10. The two lower pressure arms 52 extend from both ends of the lower pressure beam 51 along a second direction towards the fixing part 10 and are fixedly connected to the fixing part 10. The two lower pressure arms 52 and the lower pressure beam 51 form a "П" shape. The bottom surface of the lower pressure arms 52 is lower than the bottom surface of the lower pressure beam 51. The pre-pressing member 40 is fixed to the pressure block 50 by fixing it to the two lower pressure arms 52. A groove 500 is formed between the lower pressure beam 51 and the two lower pressure arms 52. The groove 500 is adapted to provide deformation space for the pre-pressing member 40. More specifically, each pressure arm 52 includes a pressure mounting platform 522 and a pressure fixing platform 521. The two pressure fixing platforms 521 are located outside the two pressure mounting platforms 522 along the optical axis direction. The distance between the two pressure fixing platforms 521 along the second direction is greater than the distance between the two pressure mounting platforms 522 along the second direction. A groove 500 is formed between the two pressure mounting platforms 522 and the pressure crossbeam 51. The pre-pressing member 40 is installed on the two pressure mounting platforms 522. The two pressure fixing platforms 521 are respectively fixed to the fixing part 10.

[0072] In this design, the groove 500, the first receiving groove 112, and the second receiving groove 113 of the pressure block 50 are connected. At least a portion of the pre-pressing member 40 and the movable part 20 are clamped between the pressure block 50 and the fixed part 10, and the pre-pressing member 40 and at least a portion of the movable part 20 are located within the space connected by the groove 500, the first receiving groove 112, and the second receiving groove 113. It should be understood that when the pressure block 50 is pressed down further in the second direction, the pre-pressing member 40 and at least a portion of the movable part 20 will be clamped more tightly, the deformation of the pre-pressing member 40 will be greater, and thus the pre-pressure generated by the pre-pressing member 40 will be greater. In other words, the pressure block 50 can not only provide deformation space for the pre-pressing member 40 and maintain the deformation generated by the pre-pressing member 40, but also adjust the magnitude of the pre-pressure generated by the pre-pressing member 40. For example, by moving the downward pressing beam 51 downward toward the movable part 20 in the second direction to achieve further downward pressing of the pressure block 50, the pre-pressure of the pre-pressing member 40 can be increased.

[0073] Furthermore, the pressing mounting platforms 522 of the two pressing arms 52 are respectively spaced apart from the fixing part 10, and gaps 520 are provided between the two pressing mounting platforms 522 and the fixing part 10. These gaps 520 can be filled with air or other cushioning materials. It should be understood that by providing these gaps 520, the pressing mounting platforms 522 and the fixing part 10 are not in direct contact, thereby reducing the impact of the fixing part 10 on the pressing mounting platforms 522. Consequently, the pre-compression member 40 fixed on the pressing mounting platforms 522 is less affected by the fixing part 10, and similarly, changes in the pre-compression member 40 have a reduced impact on the fixing part 10. For example, when the fixing part 10 is impacted, because the two pressing mounting platforms 522 are spaced apart from the fixing part 10, the impact of the impact on the pre-compression member 40 is reduced, which in turn reduces the impact on the piezoelectric actuator 30 and the driving effect of the drive device.

[0074] Furthermore, such as Figure 19 As shown, the pressure block 50 may further include a structural reinforcement 53 embedded therein to enhance the structural strength of the pressure block 50. The structural reinforcement 53 protrudes from the side of the pressure block 50. It should be understood that the structural reinforcement 53 may be embedded in the lower pressure beam 51 and the lower pressure arm 52, or it may only be embedded in the lower pressure beam 51. It should be understood that a cushioning material may also be fixed to the structural reinforcement 53 by means of adhesive bonding or integral molding. This cushioning material may be formed between the lower pressure arm 52 and the movable part 20 of the pressure block 50 to prevent the movable part 20 and the lower pressure arm 52 from directly colliding.

[0075] Continue to combine Figure 19 As shown, it is worth mentioning that in this modified embodiment, viewed along the optical axis, the movable part 20 and the pressure block 50 are spaced apart, and there is an air gap between them. In other words, along the optical axis, the movable part 20 and the pressure block 50 do not overlap. This reduces the risk of the movable part 20 colliding with the pressure block 50 when it moves relative to the fixed part 10 along the optical axis. Furthermore, since the lower pressure arm 52 of the pressure block 50 extends from the lower pressure beam 51 toward the first movable sidewall 21 of the movable part 20, specifically, viewed along the optical axis, the lower pressure beam 51 and the first movable sidewall 21 of the movable part 20 are spaced apart, and the lower pressure arm 52 and the first movable sidewall 21 of the movable part 20 are also spaced apart.

[0076] It is worth mentioning that the aforementioned spacing means that, viewed along the optical axis, the movable part 20 and the pressure block 50 are at least a certain distance apart in both the first and / or second directions. Specifically, along the second direction, the bottom surface of the lower pressure arm 52 of the pressure block 50 is higher than the top surface of the first movable sidewall 21.

[0077] In some embodiments, such as Figure 4 and Figure 16As shown, the drive device further includes a first support portion 61, which is disposed between the fixed portion 10 and the movable portion 20 along a second direction. At least a portion of the upper and lower parts of the movable portion 20 maintain frictional contact with the piezoelectric actuator 30 and the first support portion 61, respectively. In this drive device, the preload member 40, the piezoelectric actuator 30, the movable portion 20, and the first support portion 61 are sequentially clamped between the pressure block 50 and the fixed portion 10 along the second direction. The first support portion 61 provides an upward support force to the movable portion 20 along the second direction. The preload member 40 deforms under the combined action of the first support portion 61 and the pressure block 50, thereby providing a downward preload force along the second direction. It is understandable that if the pressure block 50 is not fixed to the fixing part 10, the pre-pressure member 40 and the pressure block 50 will move upward in the second direction under the action of the first support part 61, causing the pressure block 50, the pre-pressure member 40, and the piezoelectric actuator 30 to detach from the movable part 20. This would prevent the pre-pressure member 40 from deforming and generating pre-pressure, affecting the drive. To avoid this situation, the pressure block 50 is fixedly connected to the fixing part 10 in this application. Under the action of the first support part 61, the pressure block 50 will generate downward pressure in the second direction due to its connection with the fixing part 10. This prevents the pre-pressure member 40 and the pressure block 50 from detaching and maintains the deformation of the pre-pressure member 40, thus ensuring the generation of pre-pressure. The direction of the pre-pressure is the same as the direction of the downward pressure, and the direction of the downward pressure is opposite to the direction of the supporting force. It is understandable that if only the pre-pressure acts on the top of one side of the movable part 20, it may increase the risk of the movable part 20 overturning. Therefore, in order to maintain the force balance of the movable part 20, the first support part 61 provides the movable part 20 with a support force in the opposite direction to the pre-pressure to balance the pre-pressure and reduce the risk of the movable part 20 overturning.

[0078] In some embodiments, the pre-pressure member 40 deforms under the action of the pressure block 50 and the first support portion 61 to generate a pre-pressure, the direction of which is the same as the downward pressure. Under the action of the pre-pressure, the friction head 32 and the first movable sidewall 21 of the movable portion 20 always maintain frictional contact, which is beneficial for the piezoelectric actuator 30 to generate a stable driving force.

[0079] In some embodiments, reference Figures 7 to 10 , Figure 16 as well as Figure 20As shown, the drive device further includes a second support portion 62, which is disposed between the fixed portion 10 and the movable portion 20 along a second direction. The second support portion 62 and the first support portion 61 are disposed opposite each other on both sides of the bottom of the fixed portion 10 along a first direction, which is perpendicular to the second direction and the optical axis direction. The fixed portion 10 includes a first side and a second side opposite each other. The first support portion 61 is disposed on the first side close to the piezoelectric actuator 30 and is tightly clamped between the movable portion 20 and the fixed portion 10. The second support portion 62 is disposed on the second side away from the piezoelectric actuator 30 and is loosely clamped between the movable portion 20 and the fixed portion 10.

[0080] Since the pre-pressure member 40 is only provided on one side of the movable part 20, the support force provided by the second support member 62 to the bottom of the other side of the movable part 20 further balances the pre-pressure generated on one side of the movable part 20. On the one hand, it avoids excessive friction caused by the surface contact between the movable part 20 and the fixed part 10, which would result in poor driving effect. On the other hand, the provision of the second support member 62 helps to improve the parallelism of the movable part 20 when it moves, further improves the stability of the optical lens 100, and enhances the imaging quality of the camera module.

[0081] Understandably, the first support portion 61 is tightly fitted and abuts against both the fixed portion 10 and the movable portion 20, while the second support portion 62, being loosely fitted between the fixed portion 10 and the movable portion 20, has a certain gap with both the fixed portion 10 and / or the movable portion 20. This gap provides a certain amount of pre-set space for adjusting the position of the movable portion 20. In other words, when the movable portion 20 is driven by the piezoelectric actuator 30, the first support portion 61 always provides stable support for the movable portion 20 to ensure its parallelism during movement. When the movable portion 20 tilts, the gap at the second support portion 62 provides a certain amount of leeway for adjusting its position. Furthermore, when the movable portion 20 tilts to a certain degree, abutting against the fixed portion 10 and the movable portion 20 corrects the movement state of the movable portion 20, preventing further tilting and thus avoiding any impact on driving performance due to the tilt of the movable portion 20. Furthermore, this arrangement facilitates assembly; a tight fit is beneficial for the installation and positioning of the movable part 20, while a loose fit allows for easy adjustment of the movable part 20, further reducing assembly tolerances and improving the assembly accuracy of the camera module. It should be understood that the tilting of the movable part 20 in this application includes: tilting where the movable part 20 tends to rotate around the optical axis, tilting where the movable part 20 tends to rotate around a first direction, and tilting where the movable part 20 is driven to rotate around a second direction.

[0082] In some embodiments, the first support portion 61 and the second support portion 62 may also be simultaneously fitted and abutted between the fixed portion 10 and the movable portion 20, so that the first support portion 61 and the second support portion 62 can always provide stable support for the movable portion 20, thereby ensuring the parallelism of the movable portion 20 when it moves and reducing the risk of the movable portion 20 tilting.

[0083] Furthermore, when the movable part 20 is driven to move along the optical axis, the main supporting component is the first support part 61. The straight-line distance from the contact point between the friction head 32 and the movable part 20 to the first support part 61 is less than the straight-line distance from the contact point between the friction head 32 and the movable part 20 to the second support part 62. Since the first support part 61 adopts a tight-fit assembly method, the straight-line distance from the contact point between the friction head 32 and the movable part 20 to the first support part 61 is the lever arm value corresponding to the overturning moment of the movable part 20. By reducing the lever arm value, the overturning moment value is further reduced, thereby avoiding the risk of the movable part 20 tilting. Furthermore, the above-mentioned tight-fit and loose-fit assembly methods can be considered through the tolerance values ​​in the assembly process. For example, the tolerance between the first support part 61 and the movable part 20 and the fixed part 10 is small, for example, 0.01, while the tolerance between the second support part 62 and the movable part 20 and the fixed part 10 is large, for example, 0.02. When the movable part 20 is not tilted, the first support part 61 provides support for the movable part 20. However, when the movable part 20 tilts, the second support part 62 provides support to straighten the movable part 20. This can reduce the possibility of the movable part 20 tilting to a certain extent, which helps to improve the imaging quality of the camera module.

[0084] In some embodiments, reference Figure 2 , Figure 7 , Figure 16 , Figure 20 and Figure 21As shown, the movable part 20 includes a first movable sidewall 21 located on a first side and a second movable sidewall 23 located on a second side. The first movable sidewall 21 and the second movable sidewall 23 are arranged opposite each other along a first direction. The pressure block 50, the pre-pressing member 40, and the piezoelectric actuator 30 are sequentially located above the first movable sidewall 21 along a second direction. The first movable sidewall 21 is provided with a first guide groove 211 and a friction part 22. The first guide groove 211 is opened on the bottom surface of the first movable sidewall 21 and is arranged opposite to the first guide rail 111 along a second direction. The first support part 61 is installed between the first guide rail 111 and the first guide groove 211, so that the bottom surface of the first movable sidewall 21 abuts against the first support part 61. The friction part 22 is installed on the top surface of the first movable sidewall 21 and abuts against the friction head 32 of the piezoelectric actuator 30. The first movable sidewall 21 is accommodated in a second accommodating groove 113. The second movable sidewall 23 is provided with a second guide groove 231. The second guide groove 231 is formed on the bottom surface of the second movable sidewall 23 and is arranged opposite to the second guide rail 131 along a second direction. The second support part 62 is installed between the second guide rail 131 and the second guide groove 231, so that the bottom surface of the second movable sidewall 23 abuts against the second support part 62. By assembling the support part structure between the guide rail and the guide groove structure, the support part is stably clamped between the movable part 20 and the fixed part 10, thereby increasing the stability of the camera module.

[0085] In some embodiments, the fixing part 10 further includes a first fixing sidewall 11 located on a first side, a second fixing sidewall 13 located on a second side, and a fixing body 12 connecting the first fixing sidewall 11 and the second fixing sidewall 13. The first fixing sidewall 11 and the second fixing sidewall 13 are respectively disposed opposite to each other on both sides of the fixing body 12 along a second direction. A first receiving groove 112 and a second receiving groove 113 are formed in the first fixing sidewall 11 along the second direction. The first receiving groove 112 and the second receiving groove 113 are located at the top of the first fixing sidewall 11, such that the pressure block 50 abuts against the top of the first fixing sidewall 11. A first guide rail 111 is provided at the bottom of the first fixing sidewall 11, and a second guide rail 131 is provided at the bottom of the second fixing sidewall 13. The first support 61 is mounted on the first guide rail 111 and supports the first side of the movable part 20, while the second support 62 is mounted on the second guide rail 131 and supports the second side of the movable part 20. The arrangement of the first support 61 and the second support 62 reduces the frictional resistance experienced by the movable part 20 when it is driven to move, thus improving the driving performance within the camera module. The first guide rail 111 and the second guide rail 131 are flush with each other on both sides of the fixed part 10 along a first direction, so that the first support 61 and the second support 62 are relatively flush with each other along the first direction, providing stable support for the movable part 20. Further, as... Figure 4As shown, since the piezoelectric actuator 30 drives the movable part 20 from the top, the first support 61 and the second support 62, flush with the bottom of the movable part 20, are sufficient to provide stable support for the movable part 20, further improving its stability when driven along the optical axis. In other words, when the piezoelectric actuator 30 drives the movable part 20, by providing support portions at the bottom of the movable part 20 and on the opposite side where the piezoelectric actuator 30 is located, the movable part 20 is clamped between the piezoelectric actuator 30 and the support portions, preventing the movable part 20 from tilting during the driving process. Furthermore, there is no need to provide additional support portions on the side or top of the movable part 20, thereby reducing the number of support portions in the camera module, optimizing the assembly process, further reducing assembly tolerances, and increasing assembly consistency.

[0086] Specifically, when friction is generated between the support part and the fixed part 10 and the movable part 20, the movement state of the support part is uncertain. The support part may be in a rolling state or a sliding state, which may cause the friction between the support part and the movable part 20 to change. Since the support part can switch its movement state at will, reducing the number of support parts can reduce the risk of the movable part 20 tilting or overturning and the support part getting stuck, thereby enhancing the imaging performance of the camera module.

[0087] In some embodiments, the driving device further includes an insert disposed on the abutting surface between the first guide rail 111 and the first support portion 61, providing a flatter support surface for the first support portion 61. Further, the insert of the first guide rail 111 has the same shape as the first guide rail 111. For example, if the first guide rail 111 is a V-groove, the insert can also be V-shaped; if the first guide rail 111 is a U-groove, the insert can also be U-shaped; or, the insert can also be planar. On the one hand, this helps to reduce wear on the first support portion 61 when it moves inside the first guide rail 111, extending the service life of the first support portion 61; it also reduces the risk of the first support portion 61 jamming during use, further improving the quality and lifespan of the camera module. On the other hand, it reduces deformation phenomena such as pitting in the first support portion 61 caused by excessive force under preload, further enhancing the reliability of the camera module.

[0088] In some embodiments, the driving device further includes an insert that lies flat on the contact surface between the second guide rail 131 and the second support portion 62 to enhance the support for the second support portion 62. The insert of the second guide rail 131 has the same shape as the second guide rail 131. For example, if the second guide rail 131 is a V-groove, the insert can also be V-shaped; if the second guide rail 131 is a U-groove, the insert can also be U-shaped; or, the insert can also be planar. With this insert structure, on the one hand, it helps to reduce wear on the second support portion 62 when it moves inside the second guide rail 131, extending the service life of the second support portion 62; on the other hand, it reduces the risk of the second support portion 62 jamming during use, further improving the quality and lifespan of the camera module.

[0089] In some embodiments, the contact surfaces of the first guide groove 211 and the second guide groove 231 in the movable part 20 with the support structure are also provided with insert structures. That is, the first support part 61 contacts the insert in the first guide groove 211 and the insert in the first guide rail 111, respectively, and the second support part 62 contacts the insert in the second guide groove 231 and the insert in the second guide rail 131, respectively. The provided insert structures reduce wear on the first support part 61 when it moves between the first guide rail 111 and the first guide groove 211, and reduce wear on the second support part 62 when it moves between the second guide groove 231 and the second guide rail 131, further improving the usability and lifespan of the camera module. On the other hand, they also reduce deformation phenomena such as dents in the first support part 61 and the second support part 62 caused by excessive force, further enhancing the reliability of the camera module.

[0090] like Figure 8 as well as Figure 9 As shown, in some embodiments, the first support portion 61 and the second support portion 62 are each at least two support portions spaced apart along the optical axis. The spacing between the at least two support portions of the first support portion 61 is greater than the spacing between the at least two support portions of the second support portion 62, so as to provide a larger support area on the same side of the piezoelectric actuator 30. It is understood that the first support portion 61 is assembled inside the first guide groove 211, and the second support portion 62 is assembled inside the second guide groove 231. As above, the length of the second movable sidewall 23 along the optical axis can be less than the length of the first movable sidewall 21 along the optical axis to provide sufficient movement space for the first support portion 61 and the second support portion 62. The support portion can be implemented as a ball bearing or a slider.

[0091] In some embodiments, the movable part 20 and / or the fixed part 10 are provided with a guide structure suitable for mounting the support, such as a guide groove or guide rail structure. Since the support is arranged along the optical axis, it facilitates guiding the movable part 20 to move along the optical axis. It is understood that a metal insert is provided on the inner side of the guide groove or guide rail, which helps to reduce wear on the support when it moves inside the guide groove or guide rail, reduces the risk of the support getting stuck during use, and further improves the quality and lifespan of the camera module.

[0092] In some embodiments, the first support 61 can be implemented as a plurality of support portions arranged sequentially along the optical axis. It should be understood that, on the one hand, increasing the number of support portions can improve the stability and load-bearing capacity of the movable part 20, making the movable part 20 more stable when moving along the optical axis; on the other hand, since the motion state of a single support portion is uncertain—the support portion may be in a rolling or sliding state—increasing the number of support portions can compensate for the mutual motion states between the support portions. Further, the second support 62 can be implemented as a plurality of support portions arranged sequentially along the optical axis, so that the opposite sides of the movable part 20 receive balanced support. Specifically, the first support 61 includes at least three support portions, and the second support 62 includes at least three support portions.

[0093] Specifically, since the movable part 20 moves along the optical axis, a first support part 61 and a second support part 62 are provided between the movable part 20 and the fixed part 10 to support the movable part 20's own weight. To further maintain the stability of the optical lens 100, the first support part 61 and the second support part 62 are arranged as close as possible along the first direction relative to the optical axis on both sides of the bottom of the movable part 20 to provide as symmetrical support force as possible for the movable part 20, thereby reducing the risk of the movable part 20 tilting.

[0094] Understandably, since the second movable sidewall 23 does not have components such as the piezoelectric actuator 30, its length along the optical axis does not need to be increased. In other words, the length of the second movable sidewall 23 along the optical axis can be less than the length of the first movable sidewall 21 along the optical axis, which helps to increase the compactness of the drive device structure and further reduce the weight of the movable part 20 and the size of the drive device. The piezoelectric actuator 30 and the pre-pressure member 40 are set on the top of the first movable sidewall 21. On the one hand, this makes the internal space of the camera module more rationally utilized. This is because the piezoelectric actuator 30 and the pre-pressure member 40 both extend along the optical axis, and the corresponding first movable sidewall 21 of the movable part 20 also needs to extend along the optical axis. That is to say, the first movable sidewall 21 needs to have a certain length to increase the drive stroke of the piezoelectric actuator 30. Furthermore, by setting the first support part 61 on the bottom surface of the first movable sidewall 21, there can be a longer space to set the first support part 61, so as to provide a larger support area through the first support part 61. Conversely, since the piezoelectric actuator 30 does not need to be installed on one side of the second movable sidewall 23, a shorter length can be provided to offer sufficient space for the second support 62. This not only enhances the structural compactness of the lens drive device but also helps reduce its size. Furthermore, due to the large optical focusing stroke in the periscope camera module, this design also helps ensure that the first support 61 and the second support 62 consistently provide stable support for the movable part 20 throughout the long stroke. Because of the large optical focusing stroke in the camera module, this design helps ensure that the support provides effective support for the movable part 20 throughout the long stroke.

[0095] like Figure 22As shown, in a modified embodiment of this application, the first support portion 61 and the second support portion 62 are respectively disposed on both sides of the optical axis along a first direction. The first support portion 61 is disposed on the bottom surface of the first movable sidewall 21 of the movable portion 20, and the second support portion 62 is disposed on the bottom surface of the second movable sidewall 23 of the movable portion 20. The number of supports in the first support portion 61 is greater than the number of supports in the second support portion 62, and the length of the first support portion 61 along the optical axis is greater than the length of the second support portion 62 along the optical axis, thereby allowing the movable portion 20 to have more support positions in the first support portion 61. It should be understood that the piezoelectric actuator 30 and the pre-pressure member 40 are located on top of the first support portion 61. The greater number of supports in the first support portion 61 allows the force acting on the first support portion 61 (at least including the pre-pressure generated by the pre-pressure member 40) to be distributed by more supports, thereby reducing the force on each support portion and lowering the risk of pitting on the surfaces of the movable portion 20 and the fixed portion 10 in contact with the first support portion 61. Accordingly, the length of the first movable sidewall 21 along the optical axis is greater than the length of the second movable sidewall 23 along the optical axis, so as to provide more space for the first support 61. The second movable sidewall 23 is shorter along the optical axis, which can enhance the structural compactness of the drive device and reduce the size of the drive device.

[0096] Specifically, the first support part 61 has a number of supports greater than or equal to 3, for example, 8. Among them, the two supports located at both ends along the optical axis have the largest height dimension along the second direction, that is, the height dimension of the other supports along the second direction is less than or equal to the height dimension of the two supports located at both ends of the first support part 61; the second support part 62 has a number of supports of 1, and the height dimension of the second support part 62 along the second direction is equal to the height dimension of the two supports at both ends of the first support part 61.

[0097] More specifically, in this embodiment, the first support portion 61 is assembled inside the first guide groove 211, and the second support portion 62 is assembled inside the second guide groove 231. The first support portion 61 has a large number of support portions, which can reduce the risk of pits forming in the first guide groove 211 or the first guide rail 111. Accordingly, the length of the first guide groove 211 along the optical axis is greater than the length of the second guide groove 231 along the optical axis.

[0098] It is worth mentioning that in this modified embodiment, the dimension of the pressure block 50 along the optical axis is larger than the dimension of the first support portion 61 along the optical axis, and the projection of the first support portion 61 along the second direction is entirely within the projection range of the pressure block 50 along the second direction in the optical axis direction. This allows the force on the multiple supports in the first support portion 61 to be more uniform. Furthermore, the dimension of the pressure block 50 along the optical axis is also larger than the dimension of the first guide groove 211 along the optical axis, and the projection of the first guide groove 211 along the second direction is entirely within the projection range of the pressure block 50 along the second direction in the optical axis direction. Thus, even if the position of the first support portion 61 in the first guide groove 211 changes, the projection of the first support portion 61 along the second direction in the optical axis direction can still always be entirely within the projection range of the pressure block 50 along the second direction. As mentioned above, the pressure block 50 can provide deformation space for the pre-pressing member 40, maintain the deformation generated by the pre-pressing member 40, and also adjust the magnitude of the pre-pressure generated by the pre-pressing member 40. Since the first support 61, the pressure block 50, and the pre-pressure member 40 are located on the same side relative to the optical axis, the pre-pressure can act more directly on the first support 61, and the adjustment of the pre-pressure by the pressure block 50 can also directly affect the first support 61. Since the projection of the first support 61 along the second direction is entirely within the projection range of the pressure block 50 along the second direction, on the one hand, the pressure block 50 keeps the pre-pressure member 40 and the first support 61 in close spatial alignment to generate pre-pressure and support force; on the other hand, during the driving process, the first support 61 remains within the range of the pressure block 50, reducing the risk of the movable part 20 overturning and improving the stability of the driving device; furthermore, the pre-pressure adjusted by the pressure block 50 can be dispersed by the multiple supports of the first support 61, making the force on each support more uniform. Especially when a drop or impact occurs, the multiple supports can disperse the impact force, reducing the risk of dents in the first support 61. Furthermore, the pressure block 50 can also protect the first support 61 from detaching and affecting the reliability of the driving device.

[0099] It is worth mentioning that in this modified embodiment, the imaginary line of the direction of the pre-pressure applied to the movable part 20 intersects with the line connecting the first support part 61, which helps to reduce the overturning moment value and further reduce the risk of the movable part 20 tilting. Specifically, the position of the friction head 32 of the piezoelectric actuator 30 acting on the first movable sidewall 21 is aligned with the cross-sectional center of the first support part 61 in the second direction. This arrangement helps the pre-pressure applied by the pre-pressure member 40 to act stably and directly on the first support part 61, increasing the stability of the pre-pressure transmission, thereby reducing errors caused by poor alignment of components and improving the reliability of the camera module. Furthermore, this alignment method helps to reduce excessive local wear on the first support part 61, extending the service life of the camera module while reducing the overturning moment value and further reducing the risk of the optical lens 100 tilting.

[0100] It is worth mentioning that, in this embodiment, the support can be implemented as a component suitable for rolling or sliding, such as a ball, roller, or slider.

[0101] refer to Figure 2 , Figure 16 and Figure 19 As shown, in some embodiments, the movable part 20 further includes a friction part 22, which is disposed on the first movable sidewall 21 of the movable part 20 and faces the side where the friction head 32 is located. Thus, the friction head 32 of the piezoelectric actuator 30 is frictionally coupled to the friction part 22 by the pre-pressure action of the pre-pressure member 40. It can be understood that the friction part 22 helps to increase the friction between the movable part 20 and the friction head 32 of the piezoelectric actuator 30, and further enhances the driving force provided by the piezoelectric actuator 30.

[0102] In some embodiments, the friction part 22 may be integrally formed on the first movable sidewall 21 of the movable part 20, or the friction part 22 and the movable part 20 may be treated as independent components, with the friction part 22 attached to the first movable sidewall 21 of the movable part 20 by an adhesive, thus forming a separate structure from the movable part 20. It is understood that the provision of the friction part 22 helps to enhance the frictional force between the movable part 20 and the friction head 32 of the piezoelectric actuator 30, which is beneficial to improving the driving performance in the camera module. Of course, the friction part 22 may also be attached to the first movable sidewall 21 of the movable part 20 by spraying, plating, or other methods.

[0103] refer to Figure 2 , Figure 5 , Figure 6 , Figure 16 and Figure 19As shown, in some embodiments, at least a portion of the friction part 22 and the bottom of the movable part 20 maintain frictional contact with the piezoelectric actuator 30 and the first support part 61, respectively. Under the action of the pressure block 50, the first support part 61 provides the movable part 20 with an upward supporting force in the second direction, wherein the direction of the downward pressure generated by the pressure block 50 is opposite to the direction of the supporting force. To further prevent the movable part 20 from tilting, a support part is provided between the fixed part 10 and the movable part 20 to provide support and guidance for the movable part 20 to move stably along the optical axis within the fixed part 10, thereby enhancing the stability of the optical lens 100 during optical focusing and / or optical zooming of the camera module, and thus improving the imaging quality of the camera module.

[0104] Understandably, in this application, the piezoelectric actuator 30 is located at the upper part of the friction part 22 along the second direction and drives the movable part 20 at the top of the movable part 20. The preload member 40 provides preload downward along the second direction at the top of the piezoelectric actuator 30, causing the friction head 32 to make frictional contact with the friction part 22 of the movable part 20. The piezoelectric actuator 30 provides driving force to the movable part 20 to drive the movable part 20 to move along the optical axis. Furthermore, the first support part 61 located between the fixed part 10 and the movable part 20 provides support force upward along the second direction to the movable part 20. The support force is opposite to the direction of the preload, which helps to prevent surface contact between the movable part 20 and the fixed part 10, which would further increase friction and hinder driving.

[0105] In some embodiments, such as Figure 3 As shown, the pressure block 50 includes a lower pressure beam 51 and a lower pressure arm 52. The lower pressure arm 52 extends from both ends of the lower pressure beam 51 toward the fixing part 10 in a second direction, so that the pressure block 50 is fixed in the first receiving groove 112 of the fixing part 10. There is a groove 500 between the lower pressure beam 51 and the lower pressure arm 52. The groove 500 is adapted to provide deformation space for the pre-pressed member 40. The pressure arm 52 includes a pressure mounting platform 522 and a pressure fixing platform 521. The pressure fixing platform 521 is located outside the pressure mounting platform 522 along the optical axis. The length of the pressure fixing platform 521 along the second direction is greater than the length of the pressure mounting platform 522 along the second direction, so that the groove 500 is formed between the pressure mounting platform 522 and the pressure crossbeam 51. The pre-pressure component 40 is installed on the pressure mounting platform 522, and the pressure fixing platform 521 is fixed to the fixing part 10. This further simplifies the assembly process, enhances the stability of the camera module, and improves the installation stability of the pre-pressure component 40, thereby enhancing the stability of the provided pre-pressure.

[0106] In some embodiments, the first fixed sidewall 11 of the fixing part 10 further includes a first sidewall body 115 and a base extension 114, wherein there are two base extensions 114, which extend inward from the first sidewall body 115. A second receiving groove 113 is formed between the two base extensions 114, and a second mounting plane 1141 is formed on the top surface of each of the two base extensions 114. The two pressing fixing platforms 521 of the pressure block 50 abut against the two second mounting planes 1141 respectively. It is understood that the pressing arm 52 can be connected to the fixing part 10, and the two pressing fixing platforms 521 of the pressing arm 52 and the two second mounting planes 1141 of the fixing part 10 can abut against each other, further enhancing the stability and reliability of the pressure block 50. Since the pressing crossbeam 51 and the pressing mounting platform 522 are located in different height planes, the formed groove 500 provides reserved space for the deformation generated by the pre-pressing member 40. Furthermore, by fixing the pressure block 50 to the fixing part 10, adjustments can be made during the assembly process, thereby reducing the risk of inconsistencies in assembly.

[0107] In some embodiments, such as Figure 3 , Figure 6 , Figure 17 , Figure 18 and Figure 19 As shown, when the preload member 40 is subjected to the supporting force provided by the first support part 61, the preload member 40 undergoes an upward convex bending deformation and generates a preload force downward in the second direction, thereby providing a preload force downward in the second direction to the movable part 20. This causes the friction head 32 in the piezoelectric actuator 30 to rub against the movable part 20, further providing a stable driving force. It is understood that the flatness and consistency of the preload member 40 are relatively good, which helps to reduce the amount of variation in the preload member 40.

[0108] In some embodiments, the preload 40 is an elastic element capable of deformation, thereby providing a preload after deformation that drives the movable part 20 to maintain frictional contact with the piezoelectric actuator 30. Under the action of the preload, the friction head 32 in the piezoelectric actuator 30 contacts the friction part 22 of the movable part 20 and generates frictional force, thereby driving the movable part 20 to move. Specifically, in one example, such as... Figure 5 As shown, the preload component 40 is a spring with a bent structure. When subjected to the supporting force provided by the first support part 61, the bent spring will undergo an upward convex bending deformation, generating a downward preload. It is understandable that, due to the certain tolerances that arise during the assembly process of the preload component 40, the bent spring is less affected by tolerance fluctuations within a certain preload range, resulting in higher consistency in the preload provided by the bent spring.

[0109] In some embodiments, such as Figure 3 , Figure 17 and Figure 18 As shown, the pre-compression component 40 includes a fixed end 41, an elastic part 42, and a bent part 43. There are two fixed ends 41 and two bent parts 43. The two bent parts 43 are respectively disposed between the two fixed ends 41 and the elastic part 42, and respectively connect the elastic part 42 and the two fixed ends 41. The two fixed ends 41 are fixed to the pressure block 50. The elastic part 42 abuts against the piezoelectric active part 31. It is understood that a hollow structure can also be provided in the elastic part 42 and the bent part 43 to further reduce the elastic coefficient, thereby helping to reduce the influence of material tolerances, assembly tolerances, or other displacement fluctuations on the magnitude of the pre-compression.

[0110] Furthermore, when the preload element 40 is set as a spring, such as Figure 5 As shown, the reed can be bent during manufacturing to introduce a certain deformation. Therefore, during assembly, after the reed is installed with the piezoelectric actuator 30 and the pressure block 50, the deformation of the reed itself applies pre-pressure to the piezoelectric actuator 30 and the moving part 20. In other words, by pre-deforming the reed before subsequent assembly and fixing, a greater pre-pressure is applied to the moving part 20, which helps improve the driving effect.

[0111] In some embodiments, such as Figure 6 , Figure 18 and Figure 19 As shown, the preload member 40 has a planar spring structure. It can be understood that before the piezoelectric actuator 30 is driven, the deformation of the preload member 40 is generated by the synergistic action of the pressure block 50 and the first support portion 61. The preload member 40 includes a fixed end 41 and an elastic portion 42. The fixed end 41 is fixed to the pressure block 50, and the elastic portion 42 abuts against the piezoelectric active portion 31. When the preload member 40 is subjected to the supporting force of the pressure block 50 and the first support portion 61, the elastic portion 42 of the preload member 40 will undergo an upward convex bending deformation and generate a downward preload. The presence of the preload helps maintain frictional contact between the friction head 32 and the movable portion 20 to generate a stable frictional force. The piezoelectric actuator 30 further drives the movable portion 20 to move, enhancing the driving effect. It should be understood that in the above situation, the middle portion of the preload member 40 is higher than both ends and protrudes in a direction away from the piezoelectric actuator 30; that is, the elastic portion 42 of the preload member 40 is higher than the fixed ends 41 at both ends.

[0112] In some embodiments, such as Figure 6As shown, the deformation of the pre-compression member 40 is related to the length of the lower pressure arm 52 of the pressure block 50 along the second direction. In other words, given a fixed thickness of the first movable sidewall 21 of the movable part 20 and the piezoelectric actuator 30 along the second direction, the smaller the length of the lower pressure arm 52 along the second direction, the more the pressure block 50 needs to move downward along the second direction to connect the lower pressure arm 52 with the fixed part 10. At this time, the downward pressure beam 51 exerts a stronger downward force on the first support part 61, resulting in a greater supporting force provided by the first support part 61 to the pre-compression member 40, thereby increasing the deformation of the pre-compression member 40 and generating a greater preload. Conversely, the larger the length of the lower pressure arm 52 along the second direction, the smaller the degree to which the pressure block 50 moves downward along the second direction, resulting in a smaller deformation of the pre-compression member 40 and further reducing the generated preload. Understandably, the set length of the lower pressure arm 52 along the second direction cannot be too small, so as to avoid generating excessive support force and preload, which could further damage the piezoelectric actuator 30, and may also cause the first support part 61 to be subjected to excessive preload, resulting in excessive compression and dents. In other words, the set length of the lower pressure arm 52 along the second direction cannot be too large either, to prevent the deformation of the preload member 40 from being too small when the length of the lower pressure arm 52 along the second direction is too large, thus providing less preload to the movable part 20 and failing to meet the needs of driving the movable part 20 to move. On the other hand, increasing the set length of the lower pressure arm 52 along the second direction will increase the height of the camera module along the second direction, reducing the portability of the camera module.

[0113] In some embodiments, such as Figure 3 , Figure 18 As shown, each pressing mounting platform 522 of the pressure block 50 is provided with a first mounting surface 523 and a mounting post 524. The mounting post 524 protrudes from the first mounting surface 523 toward the fixed end 41 of the pre-pressing member 40, so that the fixed end 41 of the pre-pressing member 40 is fixed to the lower part of the first mounting surface 523 by the mounting post 524. Because the flat lower surface (first mounting surface 523) of the pressing mounting platform 522 helps to provide a flat mounting surface for the pre-pressing member 40, it avoids the phenomenon of inconsistent height on the left and right sides of the pre-pressing member 40, thereby avoiding the phenomenon of increasing the variation of the pre-pressing member 40 and providing inconsistent pre-pressure to the moving part 20. It should be understood, for example... Figure 18 As shown, the first mounting plane 523 is located on the lower surface of the pressure mounting platform 522, but this does not mean that the first mounting plane 523 is located on the lowest lower surface of the pressure mounting platform 522. The first mounting plane 523 may be a part of the lower surface of the step mounting of the pressure mounting platform 522.

[0114] It is understood that the mounting posts 524 on both sides of the pressure mounting platform 522 correspond to the fixing holes 411 on the fixing end 41 of the pre-compression component 40. Therefore, during assembly, the mounting posts 524 can extend into the fixing holes 411, thereby fixing the pre-compression component 40 to the pressure mounting platform 522. Specifically, during fixing, the mounting posts 524 can be directly riveted to the fixing holes 411, or adhesive can be applied to the surfaces of the fixing end 41 of the pre-compression component 40 and the pressure mounting platform 522 for pre-fixation, and then the mounting posts 524 can be riveted to the fixing holes 411 for fixing. This further enhances the stability of the pre-compression component 40 and the pressure block 50 during installation and use, which is beneficial for maintaining the stability of the provided pre-pressure.

[0115] In some embodiments, the pre-pressing component 40 can be installed on the pressure block 50 first, and after the pressure block 50 is flipped over, the lower pressure arm 52 can be fixed to the first fixed sidewall 11 of the fixed part 10. This further optimizes the assembly process of the pre-pressing component 40 and the pressure block 50, increases assembly efficiency, and reduces assembly difficulty. It should be understood that during the assembly process, the piezoelectric actuator 30 and the pre-pressing component 40 are first assembled into a semi-finished product, and then the piezoelectric actuator 30 is carried by the pre-pressing component 40 to the next assembly step. If the pre-pressing component 40 is directly assembled to the fixed part 10, it is necessary to ensure that the position of the friction head 32 of the piezoelectric actuator 30 and the moving part 20 are aligned at all times during the assembly process. Otherwise, after the assembly is completed, the friction contact position between the friction head 32 and the moving part 20 may be offset, which will affect the driving effect. Moreover, due to the characteristics of the pre-pressing component 40, it is also difficult to adjust the pre-pressing component 40 during the assembly process. Compared to the above method, the assembly method of first installing the pre-pressing component 40 onto the pressure block 50, then flipping the pressure block 50 and fixing the lower pressure arm 52 onto the fixing part 10 eliminates the need to keep the friction head 32 and the movable part 20 aligned during the assembly of the pre-pressing component 40, thus reducing the assembly difficulty. Moreover, after the pre-pressing component 40 is attached to the pressure block 50, the position and assembly between the pressure block 50 and the fixing part 10 can be adjusted to achieve the adjustment of the pre-pressing component 40, thus providing greater adjustability.

[0116] It is worth mentioning that, in this application, such as Figure 3 , Figure 18 As shown, the two fixed ends 41 of the preload member 40 are respectively provided with perforated holes 412 located outside the fixed holes 411. Due to the mutual influence of forces between the preload member 40 and the piezoelectric actuator 30, the perforated holes 412 can buffer and disperse stress, providing a buffering effect for the deformation of the preload member 40 and avoiding structural damage caused by stress concentration. Furthermore, the perforated holes 412 are symmetrically formed around the fixed holes 411. More specifically, the perforated holes 412 have an arc-shaped structure and are axially symmetrically formed around the fixed holes 411 with respect to the optical axis.

[0117] Furthermore, in this application, the pre-compression member 40 can also be installed on the pressure block 50 by insert injection molding. For example, the two fixed ends 41 of the pre-compression member 40 are at least partially fitted into the lower pressure mounting platform 522 of the two lower pressure arms 52 of the pressure block 50 to achieve the fixation of the pre-compression member 40 and the pressure block 50.

[0118] like Figure 8 As shown, in some embodiments, two first guide grooves 211 are spaced apart on the bottom surface of the first movable sidewall 21 along the optical axis, and two second guide grooves 231 are spaced apart on the bottom surface of the second movable sidewall 23 along the optical axis. The distance between the farthest endpoints of the two first guide grooves 211 is greater than the distance between the farthest endpoints of the two second guide grooves 231.

[0119] Due to the pre-pressure, the friction head 32 drives the friction part 22 on the first movable sidewall 21. By increasing the length of the first movable sidewall 21 along the optical axis, the length of the friction part 22 on the first movable sidewall 21 along the optical axis is increased, thereby increasing the travel of the movable part 20. Furthermore, the piezoelectric actuator 30 and the first support part 61 are co-located on the first movable sidewall 21. Since both the piezoelectric actuator 30 and the pre-pressure member 40 extend along the optical axis, the corresponding first movable sidewall 21 also needs to extend along the optical axis. In other words, the first movable sidewall 21 has a certain length along the optical axis. Therefore, there is more space on the bottom side of the first movable sidewall 21 to accommodate the first support part 61. To further improve the structural balance, the distance between the first support parts 61 can be appropriately increased. Specifically, the first guide groove 211 and the second guide groove 231 can be circular, rectangular, hemispherical, U-shaped, V-shaped, pyramidal, etc.

[0120] In some embodiments, two first guide grooves 211 are spaced apart on the bottom surface of the first movable sidewall 21 along the optical axis, the first support 61 is installed in the first guide groove 211 and the first guide rail 111, and two second guide grooves 231 are spaced apart on the bottom surface of the second movable sidewall 23 along the optical axis, which is suitable for the second support 62 to be installed in the second guide groove 231 and the second guide rail 131, which helps to improve the installation stability of the support and optimize the assembly process.

[0121] Furthermore, since the support structure is assembled inside the guide groove structure, as the distance between the two first guide grooves 211 increases, the distance between the two support parts of the first support part 61 assembled in the two first guide grooves 211 also increases, thereby making the support area formed by the line connecting the first support part 61 and the second support part 62 larger, thereby reducing the risk of the movable part 20 tilting during movement.

[0122] In some embodiments, such as Figure 6As shown, along the second direction, the projection of the friction part 22 overlaps with the line connecting the projections of the farthest endpoints of the two first guide grooves 211, and the projection of the friction part 22 overlaps with the line connecting the projections of the two support parts of the first support part 61. This helps to suppress the risk of the movable part 20 tipping over in the left-right and front-back directions. Therefore, by increasing the distance between the two support parts of the first support part 61, a larger support area is provided for the movable part 20, and a stable support force is provided throughout the entire movement stroke of the movable part 20, reducing the possibility of the movable part 20 tipping over in the front-back direction. In other words, the length of the friction part 22 along the optical axis is less than the distance between the farthest endpoints of the two first guide grooves 211 along the optical axis.

[0123] In some embodiments, the first support portion 61 and the second support portion 62 each include two balls for providing a stable supporting force to the movable portion 20. Further, each ball is disposed within a single guide groove to avoid interference between the two balls. It is understood that the greater the distance between the two balls spaced apart along the optical axis in the first support portion 61 and the second support portion 62, the more stable the supporting force provided to the movable portion 20, further enhancing the stability and reliability of the optical lens 100. When the distance between the two balls in the first support portion 61 is greater than the distance between the two balls in the second support portion 62, the area of ​​the support surface formed by the ball assembly is increased, thereby increasing the stability of the optical lens 100.

[0124] In some embodiments, the projection of the friction head 32 of the piezoelectric actuator 30 along the second direction overlaps with the projection of the line connecting the first support portion 61 along the second direction, further reducing the overturning moment value and reducing the risk of the moving portion 20 overturning.

[0125] In some embodiments, the piezoelectric actuator 30 has two friction heads 32, which are spaced apart along the optical axis on the piezoelectric active part 31. The distance between the two friction heads 32 of the piezoelectric actuator 30 is less than the distance between the two supports of the first support part 61, which helps to reduce the deviation of the preload and further makes the preload evenly distributed on the two supports of the first support part 61, reducing wear and damage to the first support part 61 caused by uneven preload. Furthermore, when the piezoelectric active part 31 causes the friction heads 32 to move by generating vibration deformation, the angle of contact between the friction heads 32 and the movable part 20 changes with the movement. This causes the force generated between the friction heads 32 and the movable part 20 to not always be parallel to the optical axis. The direction of the force may have a certain tilt angle relative to the plane where the first movable sidewall 21 of the movable part 20 is located. At this time, the tilted force may further cause the movable part 20 to tilt. Therefore, the larger the distance between the two support parts of the first support part 61, the larger the support area of ​​the movable part 20 can be, thereby reducing the overturning moment value and further reducing the risk of the movable part 20 tilting.

[0126] In some embodiments, the imaginary line of the direction of the pre-pressure applied to the movable part 20 intersects with the line connecting the first support part 61, which helps to reduce the overturning moment value and further reduce the risk of the movable part 20 tilting.

[0127] In some embodiments, the position of the friction head 32 of the piezoelectric actuator 30 acting on the first movable sidewall 21 is aligned with the cross-sectional center of the first support portion 61 in a second direction. This arrangement facilitates the stable and direct application of pre-pressure by the pre-pressure member 40 onto the first support portion 61, increasing the stability of pre-pressure transmission and reducing errors caused by misalignment of components, thereby improving the reliability of the camera module. Furthermore, this alignment helps reduce excessive local wear on the first support portion 61, extending the service life of the camera module while reducing the overturning moment value, further reducing the risk of tilting of the optical lens 100.

[0128] like Figure 22 In the modified embodiment shown, the first movable sidewall 21 has one first guide groove 211, and the second movable sidewall 23 has one second guide groove 231. The length of the first guide groove 211 along the optical axis is greater than the length of the second guide groove 231 along the optical axis. It should be understood that a larger length of the first guide groove 211 along the optical axis allows for a greater number of support portions of the first support portion 61 disposed in the first guide groove 211, thereby increasing the support area formed by the line connecting the first support portion 61 and the second support portion 62, thus reducing the risk of tilting of the movable portion 20 during movement.

[0129] Furthermore, in this modified embodiment, such as Figure 19 As shown, viewed along the second direction, the projections of the friction heads 32 of the piezoelectric actuator 30 all fall on the first guide groove 211 along the optical axis. Furthermore, viewed along the second direction, the projections of the friction heads 32 of the piezoelectric actuator 30 all fall on the first support portion 61 along the optical axis. This reduces the risk of the moving part 20 tipping over and also helps to evenly distribute the preload on the first support portion 61, reducing wear and damage to the first support portion 61 caused by uneven preload. More specifically, the piezoelectric actuator 30 has two friction heads 32, which are spaced apart along the optical axis on the piezoelectric active part 31. The distance between the two friction heads 32 can be greater than the dimension of any one of the first support portions 61 in the optical axis direction. Viewed along the second direction, the projections of both friction heads 32 all fall on the first support portion 61 along the optical axis. Therefore, in some cases, viewed along the second direction, the projections of all the friction heads 32 of the piezoelectric actuator 30 all fall on the first support portion 61 along the optical axis.

[0130] Accordingly, in this modified embodiment, when viewed along the second direction, the projection of the friction part 22 overlaps with the projection of the first guide groove 211, so that during the movement stroke of the movable part 20, the projection of the friction head 32 can fall on the first support part 61. More specifically, the length of the friction part 22 along the optical axis is less than the length of the first guide groove 211 along the optical axis.

[0131] In some embodiments, reference Figure 8 , Figure 9 and Figure 22 As shown, the first support part 61 and the second support part 62 are components that can be independently formed relative to the movable part 20 and the pressure block 50. Further, the first support part 61 can be a multi-point structure spaced apart along the optical axis, such as a ball bearing or a slider. The second support part 62 can be a multi-point structure or a guide rail structure spaced apart along the optical axis, such as a ball bearing, a slider, or a guide rod. When a guide rod is used as a support component, its better linearity can increase the stability and reliability of the movable part 20 when it is driven to move, further reducing the tilting or overturning phenomenon of the optical lens 100. Specifically, the second guide groove 231 equipped with the second support part 62 can be trapezoidal, rectangular, or V-shaped, etc.

[0132] Understandably, when the first support 61 uses ball bearings as its support structure and the second support 62 uses a guide rod as its support structure, the downward pressure exerted on the second support 62 in the second direction is mainly due to the magnetic attraction force provided by the magnetic attraction component 70, which is less than the preload force on the first support 61. The pressure on the first support 61 includes the magnetic attraction force provided by the magnetic attraction component 70 and the preload force provided by the preload component 40. This reduces the frictional force generated by the surface contact of the second support 62, thereby reducing the power consumption of the piezoelectric actuator 30. On the other hand, if the first support 61 uses a guide rod as its support structure, the large frictional force generated by the surface contact of the guide rod structure, which has a large coefficient of friction due to the large pressure, will affect the driving effect of the piezoelectric actuator 30. Understandably, when using ball bearings as the support structure, the ball bearings contact the guide rail and guide groove using point contact, resulting in minimal rolling friction and large sliding friction, which is beneficial for driving the moving part 20.

[0133] In some embodiments, the first support portion 61 and the second support portion 62 are configured as hemispherical structures fixed to the fixed portion 10 and / or the movable portion 20, or they may be bosses. Using point contact friction helps to reduce wear on the guide groove or guide rail structure and extend the service life of the camera module.

[0134] In some embodiments, such as Figure 9 , Figure 10 , Figure 20 and Figure 22 As shown, the driving device further includes a magnetic suction assembly 70, which includes a first magnetic suction member 71 and a second magnetic suction member 72. The first magnetic suction member 71 is disposed on the main body of the fixed part 10, and the second magnetic suction member 72 is disposed on the bottom of the movable part 20. The first magnetic suction member 71 and the second magnetic suction member 72 are disposed opposite to each other along a second direction and interact to generate a magnetic attraction force. This magnetic attraction force causes the movable part 20 and the fixed part 10 to clamp the first support part 61 and the second support part 62. (Refer to...) Figure 9 and Figure 10 Along the first direction, the distance from the second magnetic member 72 to the second support portion 62 is less than the distance from the second magnetic member 72 to the first support portion 61, and the directions of the magnetic attraction force and the preload are the same. Specifically, the second magnetic member 72 is disposed on the second movable sidewall 23 in the movable portion 20, and the first magnetic member 71 is disposed on the second fixed sidewall 13 in the fixed portion 10. The first magnetic member 71 and the second magnetic member 72 are arranged opposite to each other along the second direction and generate a magnetic attraction force through interaction. (Referring to...) Figure 20 and Figure 21As shown, along the first direction, the distance from the second magnetic chuck 72 to the second support portion 62 is greater than the distance from the second magnetic chuck 72 to the first support portion 61, and the directions of the magnetic attraction force and the preload are the same. Specifically, the second magnetic chuck 72 is disposed on the first movable sidewall 21 of the movable portion 20, and the first magnetic chuck 71 is disposed on the first fixed sidewall 11 of the fixed portion 10. The first magnetic chuck 71 and the second magnetic chuck 72 are arranged opposite each other along the second direction and generate a magnetic attraction force through interaction. Since the direction of the magnetic attraction force is the same as the direction of the preload, the preload and the magnetic attraction force are superimposed, and the preload can provide additional support when the magnetic attraction force is insufficient to resist external forces. Furthermore, since the magnetic chuck assembly 70 is disposed at the bottom of the movable portion 20 and the piezoelectric actuator 30 is disposed at the top of the movable portion 20, the movable portion 20 can be supported by only a support portion at the bottom, further reducing the number of positions that need to be provided in the camera module.

[0135] Understandably, since the magnetic suction assembly 70 is located at the bottom of the movable part 20, the first movable sidewall 21 is subjected to pre-pressure, and the movable part 20 tends to tilt. Therefore, a magnetic suction force is needed to reduce the risk of the movable part 20 tilting. The magnetic suction force and the pre-pressure force are in the same direction, along the first direction. The point of application of the magnetic suction force and the point of application of the pre-pressure force on the movable part 20 are located on opposite sides of the optical axis. This helps to ensure that the movable part 20 is tightly attached to the fixed part 10, enhancing the stability of the camera module. Furthermore, the magnetic suction force and the pre-pressure force work together to further balance the forces on the movable part 20, helping to reduce the tilting of the optical lens 100 caused by torque imbalance.

[0136] In some embodiments, Figure 9 and Figure 10 The second magnetic attractor 72 is disposed in the middle area between the two second guide grooves 231 along the optical axis to reduce the overturning moment value and further reduce the risk of the movable part 20 tilting.

[0137] In some embodiments, such as Figure 10 As shown, the first magnetic chuck 71 is a metal magnetic yoke. The first magnetic chuck 71 includes a base portion 711 and a support portion 712. At least a portion of the base portion 711's projection along the second direction overlaps with the projection of the second magnetic chuck 72 along the second direction, and at least a portion of the support portion 712's projection along the second direction overlaps with the projection of the second support portion 62 along the second direction. By providing the first magnetic chuck 71, on the one hand, the magnetic attraction is enhanced, better balancing the preload and reducing the risk of the movable part 20 tipping over; on the other hand, the magnetic attraction allows the support portion to be stably clamped between the movable part 20 and the fixed part 10, improving the stability of the support portion and thus improving the imaging quality of the camera module.

[0138] In some embodiments, the base portion 711 and the support portion 712 of the first magnetic suction member 71 are integrally connected, which improves the convenience of processing and increases processing efficiency. Furthermore, the base portion 711 and the support portion 712 can be a separate structure, which helps to improve the flatness of the base portion 711, but when the area of ​​the base portion 711 is too large, deformation is likely to occur.

[0139] In some embodiments, the support portion 712 may be V-shaped or planar according to the shape of the first guide rail 111 and the second guide rail 131, and is provided on the lower side of the first support portion 61 and / or the second support portion 62 along the second direction, so as to avoid pits in the first support portion 61 and the second support portion 62, and further improve the quality of use and service life of the camera module.

[0140] Furthermore, such as Figure 20 and Figure 22 As shown, the second magnetic chuck 72 is fixed to the movable part 20, and the first magnetic chuck 71 is fixed to the fixed part 10. The second magnetic chuck 72 and the first magnetic chuck 71 are arranged opposite each other along the second direction and generate magnetic attraction through their interaction. The distance between the second magnetic chuck 72 and the first support part 61 in the first direction is less than the distance between the second magnetic chuck 72 and the second support part 62 in the first direction; that is, in the first direction, the second magnetic chuck 72 is closer to the first support part 61 than the second support part 62. Since the dimension of the first support part 61 in the optical axis direction is larger than the dimension of the second support part 62 in the optical axis direction, bringing the second magnetic chuck 72 closer to the first support part 61 ensures that the magnetic attraction generated by the magnetic chuck assembly 70 is relatively large from each side of the support plane formed by the first support part 61 and the second support part 62, thereby reducing the risk of the movable part 20 tipping over relative to the fixed part 10.

[0141] In some embodiments, the piezoelectric actuator 30 further includes a conductive element 33 disposed between the piezoelectric active part 31 and the pre-pressing member 40, such as Figure 3 , Figures 15 to 19 As shown, the conductive component 33 includes a first connecting portion 331, a second connecting portion 333, and a conductive portion 334. (Referring to...) Figure 3 In the illustrated embodiment, the first connecting portion 331 is a horizontal plate disposed along the second direction between the piezoelectric active portion 31 and the pre-pressing member 40 of the piezoelectric actuator 30, and the second connecting portion 333 is a vertical plate integrally bent along the second direction from the first connecting portion 331. The conductive portion 334 extends from the second connecting portion 333 along the outer peripheral wall of the fixing portion 10 in the optical axis direction and is connected to the conductive member 14 provided on the fixing portion 10. Referring to... Figures 15 to 19In the illustrated embodiment, the first connecting portion 331 is a horizontal plate disposed along the second direction between the piezoelectric active portion 31 and the pre-pressing member 40 of the piezoelectric actuator 30. The first connecting portion 331 may have a through hole to reduce the influence of the conductive member 33 on the piezoelectric active portion 31. The second connecting portion 333 is a vertical plate integrally bent along the second direction from the first connecting portion 331. The conductive portion 334 extends along the outer peripheral wall of the fixing portion 10 from the second connecting portion 333 in the second direction and is connected to the conductive member 14 provided on the fixing portion 10. Specifically, the second connecting portion 333 includes a first sub-connecting portion 3331 and a second sub-connecting portion 3332. The first sub-connecting portion 3331 and the second sub-connecting portion 3332 are respectively connected from both ends of the first connecting portion 331 along the optical axis and integrally bent towards the second direction. Then, the other ends of the first sub-connecting portion 3331 and the second sub-connecting portion 3332 are respectively connected to the conductive portion 334 in the second direction. The conductive element 33 can increase the space utilization inside the camera module and achieve electrical conduction.

[0142] Furthermore, the conductive component 33 also includes two shaping components 335 that are respectively fixed to the outside of the bends of the first sub-connecting portion 3331 and the second sub-connecting portion 3332. The shaping components 335 are used to maintain the bent state of the first sub-connecting portion 3331 and the second sub-connecting portion 3332. The shaping components 335 can be made of materials such as plastic or metal.

[0143] In some embodiments, the friction head 32 in the piezoelectric actuator 30 can directly contact the first movable sidewall 21 of the movable part 20 which does not have a friction part 22, thereby reducing the weight of the movable part 20 and further reducing the resistance that needs to be overcome to drive the movable part 20.

[0144] refer to Figure 1 , Figure 4 , Figure 15 and Figure 16 As shown, in some embodiments, the circuit components in the camera module, in addition to the flexible circuit board, also include a conductive member 14 disposed around the outer peripheral wall of the fixing part 10. Specifically, the conductive member 14 is embedded or externally disposed on the first fixing side wall 11 and the second fixing side wall 13, with at least a portion of the conductive member 14 exposed on the outer peripheral side of the fixing part 10. The conductive member 14 is provided with a conductive portion 141, and the conductive member 14 is soldered to the conductive part 334 through the conductive portion 141 to achieve electrical conduction. Furthermore, the conductive member 14 enables the conduction of the circuit portions of the photosensitive component 80, the light-converting element 90, and other circuit modules through a simple electrical connection. For example, Figure 2 and Figure 15 The conductor 14 with a bent structure shown is easy to connect and adapts to complex spatial layouts and shape requirements, further enabling efficient wiring design in narrow or irregular spaces, thereby improving space utilization.

[0145] Furthermore, one of the first magnetic attractor 71 and the second magnetic attractor 72 is a magnet, and the other is a magnet or yoke suitable for attracting the magnet. The magnet or yoke can be fixed by means of adhesion, insert injection molding, riveting, etc. Since the first movable sidewall 21 and the second movable sidewall 23 of the movable part 20 are subjected to preload and magnetic attraction force respectively, and the direction of the magnetic attraction force is the same as the direction of the preload, it helps to reduce the risk of tilting of the movable part 20. Specifically, the preload can be greater than the magnetic attraction force, because when the magnetic attraction force is too large, the frictional resistance that the movable part 20 needs to overcome when driving the movement will also be greater, further increasing the power consumption of the piezoelectric actuator 30, which is not conducive to the driving of the movable part 20.

[0146] In some embodiments, the first magnetic attractor 71 is a magnet, and the second magnetic attractor 72 is an insert-molded magnetic yoke, which can also be used as a conductor 14 to simplify the structure. Specifically, the magnetic yoke is designed with metal strip and is cut and shaped after manufacturing; this mass production method can further improve production efficiency. Furthermore, the magnetic yoke used in this application has a large planar area; increasing the metal pressing area during manufacturing can increase the planar regularity. Furthermore, the magnetic yoke can be made of a material that attracts magnets, such as metal, to further enhance the magnetic attraction and thus improve the stability of the optical lens 100.

[0147] In some embodiments, the magnetic suction assembly 70 further includes a first magnetic suction member 71 and a second magnetic suction member 72. The first magnetic suction member 71 located on the movable part 20 and the second magnetic suction member 72 disposed on the fixed part 10 interact and generate a magnetic attraction force. Therefore, when the movable part 20 is driven along the optical axis, the magnetic attraction force generated by the magnetic suction assembly 70 can ensure that the movable part 20 is always supported by the support part during the long stroke of the movable part 20, and the movable part 20 will not tilt to a large extent. Furthermore, the magnetic attraction force generated by the magnetic suction assembly 70 located on the second movable sidewall 23 is consistent with the direction of the pre-pressure generated by the pre-pressure member 40 on the first movable sidewall 21, which helps to improve the fit between the movable part 20 and the fixed part 10, further reducing the tilting phenomenon of the movable part 20 due to torque imbalance, and further reducing the risk of the optical lens 100 tilting.

[0148] In some embodiments, such as Figure 2 , Figure 3 , Figure 16 , Figure 17 , Figure 18 and Figure 19As described above, the piezoelectric actuator 30 includes a piezoelectric active part 31, a friction head 32, and a conductive element 33. Under pre-pressure, the piezoelectric actuator 30 abuts against the movable part 20. Specifically, the friction head 32 is disposed on the side of the piezoelectric active part 31 facing the first movable sidewall 21. The piezoelectric active part 31 generates mechanical resonant motion through the inverse piezoelectric effect. When the frequency of the applied voltage matches the natural frequency of the piezoelectric active part 31, resonance occurs, generating ultrasonic waves. Therefore, oscillating reciprocating motion or elliptical motion can be achieved on a specifically configured electrode layer, thereby driving the friction head 32 to perform oscillating reciprocating motion or elliptical motion. Furthermore, through the friction between the friction head 32 and the first movable sidewall 21, the movable part 20 is driven to slide relative to the fixed part 10.

[0149] refer to Figure 2 , Figure 3 , Figure 16 , Figure 17 , Figure 18 and Figure 19 It is understood that in some embodiments, the piezoelectric actuator 30 further includes a buffer 34 disposed between the preload member 40 and the piezoelectric active part 31. Since the elastic modulus of the buffer 34 is lower than that of the preload member 40, the buffer 34 is more prone to deformation, thereby adaptively generating different degrees of shrinkage deformation according to the different tolerances in different piezoelectric actuators 30, thus reducing the preload difference between piezoelectric actuators 30 with different tolerances. In other words, the deformable buffer 34 can offset at least part of the preload changes caused by material tolerances and assembly tolerances, and can also absorb some deformation of the piezoelectric active part 31. The buffer 34 can also absorb some vibration deformation of the piezoelectric active part 31 to stably maintain the parallelism of the piezoelectric active part 31 relative to the first movable sidewall 21, further protecting the piezoelectric actuator 30 from excessive mechanical stress. It is worth mentioning that in one specific example, the buffer 34 is disposed between the elastic part 42 of the preload member 40 and the piezoelectric active part 31.

[0150] It is understood that the buffer 34 can be an adhesive tape, with one surface flatly bonded to the pre-compression member 40, and the opposite surface bonded to the piezoelectric active part 31 or components below the piezoelectric active part 31. Furthermore, the adhesive tape is easy to install and use, requiring no curing while maintaining good flatness, which helps maintain the parallelism of the piezoelectric active part 31 relative to the first movable sidewall 21. The size of the buffer 34 can be less than, equal to, or greater than the size of the piezoelectric active part 31, such that the buffer 34 fills the space between the piezoelectric active part 31 and the pre-compression member 40. Similarly, this application does not need to limit the specific shape and number of the buffer 34; for example, two pieces of adhesive tape can be stacked as the buffer 34, or two pieces of adhesive tape can be spaced apart along the second direction. Preferably, the size of the buffer 34 is larger than the size of the piezoelectric active part 31, so that the area between the piezoelectric active part 31 and the pre-compression member 40 is completely filled by the buffer 34, which helps ensure the structural strength of the pre-compression member 40 connection and enhances the installation parallelism provided to the piezoelectric active part 31.

[0151] Specifically, the buffer 34 can also be a low-modulus adhesive disposed on the surface of the piezoelectric active part 31. In other words, since the buffer 34 can be attached between the pre-compression part 40 and the conductive part 33, it not only has the advantage of easy assembly, but also avoids the problem of affecting the vibration mode of the piezoelectric active part 31 after using adhesives such as UV glue or thermosetting glue to bond the pre-compression part 40.

[0152] Furthermore, such as Figure 16 , Figure 17 , Figure 18 and Figure 19 As shown, the preload member 40 also includes an intermediate connector 44, which is disposed between the elastic part 42 and the buffer member 34. The intermediate connector 44 is fixed to the elastic part 42, thereby fixing the elastic part 42 to the buffer member 34 via the intermediate connector 44. The intermediate connector 44 facilitates the fixing of the preload member 40 to the piezoelectric actuator 30, provides a flat mounting surface for the piezoelectric actuator 30, and allows adjustment of the height of the elastic part 42 in the second direction by adjusting the thickness of the intermediate connector 44, thereby adjusting the magnitude of the preload provided by the preload member 40. Specifically, the intermediate connector 44 can be fixed to the elastic part 42 first, and then fixed to the piezoelectric actuator 30; alternatively, the intermediate connector 44 can be fixed to the piezoelectric actuator 30 via the buffer member 34 first, and then fixed to the elastic part 42. Of course, fixing the preloaded part 40 to the elastic part 42 first improves the ease of fixing the preloaded part 40 to the piezoelectric actuator 30, and also creates a flat mounting surface for the preloaded part 40. Here, the intermediate connector 44 and the elastic part 42 can be fixed by adhesive bonding, insert injection molding, riveting, etc. For example, in Figure 16 and Figure 19 In the illustrated modified embodiment, the intermediate connector 44 has two connecting posts 441 protruding towards the elastic portion 42, and the elastic portion 42 correspondingly forms two connecting holes 421, so that the two connecting posts 441 pass through the two connecting holes 421 respectively, and are then fixed by riveting. Here, the use of connecting posts 441 and connecting holes 421 not only facilitates positioning, but also allows the connecting posts 441 to protrude through the connecting holes 421 and out of the elastic portion 42, thereby enabling the connecting posts 441 to protect the elastic portion 42 and prevent the elastic portion 42 from directly impacting the pressure block 50.

[0153] like Figure 2 , Figure 3 , Figure 16 and Figure 17 As shown, in some embodiments, the piezoelectric active part 31 is a substrate utilizing the inverse piezoelectric effect, which contracts or expands according to changes in the polarization direction and the electric field direction. This effect means that when an electric field is applied in the polarization direction of the dielectric, the dielectric will undergo mechanical deformation, thereby enabling the piezoelectric active part 31 to achieve polarization by applying an electric field to materials such as single crystals, polycrystalline ceramics, and polymers, thereby generating ultrasonic oscillations. This oscillation can generate oscillating reciprocating motion or elliptical motion on a specifically configured electrode layer, thereby driving the friction head 32 to perform corresponding movements. It can be understood that the frictional force between the friction head 32 and the outer wall of the movable part 20 can drive the movable part 20 to move relative to the fixed part 10; therefore, the driving force is actually the frictional force between the friction head 32 and the movable part 20.

[0154] In one specific embodiment of this application, the piezoelectric active unit 31 adopts a multi-layer stacked structure. Specifically, the piezoelectric active unit 31 is formed by alternating stacking of ceramic layers and electrode layers in the thickness direction, in the order of ceramic layer, electrode layer, ceramic layer, electrode layer... ceramic layer, electrode layer, ceramic layer. Each electrode layer is located between two adjacent ceramic layers. When an electric field is applied between adjacent electrode layers, the ceramic layer will undergo elongation or contraction deformation. By setting multiple electrode layers, the voltage required to drive the piezoelectric active unit 31 to perform bending vibration can be reduced. The number of electrode layers and ceramic layers can be selected according to specific needs. In other words, for example, the number of ceramic layers can be greater than or equal to the number of electrode layers. The ceramic layers are usually made of materials with piezoelectric effect, such as PZT piezoelectric ceramics; while the electrode layers are made of conductive materials, such as copper, gold, silver, or silver alloys. The fixation between the multiple ceramic layers and the multiple electrode layers can be achieved by a ceramic co-firing process, that is, laying a layer of ceramic slurry, then laying a layer of electrode slurry, and then heating and sintering them together to form the stacked piezoelectric active unit 31. Furthermore, by providing a power source to the multilayer electrode layers, the multilayer ceramic layers disposed between the multilayer electrode layers can be polarized.

[0155] It is understandable that the side electrical connection part in the camera module is connected to the positive voltage and negative voltage of the power supply respectively, thereby providing at least one electrode layer with positive voltage and at least one electrode layer with negative voltage, thereby polarizing the multilayer ceramic layer. The piezoelectric ceramics after polarization will automatically align in the piezoelectric direction, further generating the piezoelectric effect.

[0156] In some embodiments, to improve the driving performance of the piezoelectric actuator 30, the piezoelectric active part 31 may be made of piezoelectric ceramic material or piezoelectric single crystal material. The piezoelectric active part 31 may be a single-layer ceramic body or a multi-layer ceramic body, or a single-layer single crystal or a multi-layer single crystal, such as lead zirconate titanate (PZT) based piezoelectric ceramics, potassium sodium niobate (KNN) based piezoelectric ceramics, barium titanate (BT) based piezoelectric ceramics, lead magnesium niobate-lead indium niobate (PMN-PT) based piezoelectric single crystals, etc.

[0157] In some embodiments, the piezoelectric active part 31 is rectangular in shape along the optical axis. A friction head 32 protrudes from the piezoelectric active part 31 on the side facing the movable part 20 along the second direction. Specifically, two friction heads 32 are provided, spaced apart along the optical axis. It can be understood that the piezoelectric actuator 30 drives the movable part 20 to move along the optical axis. Compared to having only a single protruding friction head 32 to drive the movable part 20, having two friction heads 32 working together improves the effect of driving the movable part 20 to perform long-stroke movements.

[0158] In some embodiments, the friction head 32 is made of wear-resistant materials, such as various high-hardness wear-resistant ceramic materials, like alumina, zirconium oxide, silicon carbide ceramics, or high-wear-resistant metal materials, carbon fiber materials, or composite materials of ceramics, metal particles, and polymers. This improves the wear resistance of the friction head 32 and enhances the friction between the moving part 20 and the friction head 32, further strengthening the driving force provided by the piezoelectric actuator 30. Furthermore, the good wear resistance helps extend the service life of the friction head 32. In some embodiments, the friction head 32 and the piezoelectric active part 31 can be an integral structure or a detachable structure. The friction head 32 and the piezoelectric active part 31 can be fixed to the piezoelectric active part 31 by means of bonding, snap-fitting, nesting, welding, or fastener connection, ensuring that the connection strength is guaranteed through surface contact. Simultaneously, the friction head 32 can generate significant movement with the deformation of the piezoelectric active part 31.

[0159] In some embodiments, the piezoelectric active part 31 undergoes bending vibration along the second direction in a mode with one crest and one trough. Since the position of the friction head 32 can match the mode of the piezoelectric active part 31, the friction head 32 can be positioned at the crest and trough of the mode at the corresponding location. It is understood that the shape of the friction head 32 can be a sphere, hemisphere, cuboid, frustum, cylinder, semi-cylinder, etc. The number of friction heads 32 can be one, two, or more. In this application, no specific limitations are placed on the shape or number of friction heads 32, the shape or electrode arrangement of the piezoelectric active part 31, or the connection method between the friction head 32 and the piezoelectric active part 31.

[0160] In some embodiments, the driving device further includes a drive control component 110 for sensing and controlling the movement position of the movable part 20. The drive control component 110 is disposed on the side of the movable part 20 to make reasonable use of the space of the camera module and increase the compactness of the structure. Further, the drive control component 110 includes a sensing magnet 1101 and a sensing chip 1102, wherein the sensing magnet 1101 is fixed to the movable part 20 and the sensing chip 1102 is fixed to the fixed part 10, so that when the distance between the sensing magnet 1101 and the sensing chip 1102 changes, the magnetic field of the sensing magnet 1101 obtained by the sensing chip 1102 changes, thereby obtaining the position change information of the sensing magnet 1101 and the movable part 20 relative to the fixed part 10. It is worth mentioning that the sensing chip 1102 can be a position sensing element such as a Hall element, an integrated circuit driver (driver IC), or a tunnel magnetoresistive (TMR).

[0161] Further reference Figure 21 As shown, in this modified embodiment, the drive control component 110 and the piezoelectric actuator 30 are disposed on the same side of the movable part 20, that is, on the side where the first movable sidewall 21 is located. This allows the drive control component 110 to better acquire position change information of the movable part 20, achieving better drive control. Specifically, the sensing magnet 1101 is fixed to the first movable sidewall 21, and the sensing magnet 1101 is located below the piezoelectric actuator 30. The sensing chip 1102 is fixed and electrically connected to the conductive member 14, thereby the sensing chip 1102 is fixed to the fixing part 10 through the conductive member 14. More specifically, the sensing chip 1102 is located diagonally opposite the sensing magnet 1101 to provide better position sensing. Viewed along the first direction, the sensing chip 1102 and the sensing magnet 1101 do not overlap at least partially. Further, the sensing chip 1102 is located diagonally below the sensing magnet 1101.

[0162] Furthermore, the drive unit also includes an upper cover 120, which is fixed above the fixing part 10 and forms a receiving cavity to accommodate other components of the drive unit.

[0163] In some embodiments of this application, such as Figure 1 As shown, the camera module further includes an optical system, which is assembled inside the fixing part 10, which is a frame. The optical system includes a light-reflecting element 90, an optical lens 100, and a photosensitive component 80, arranged sequentially along the optical axis. The optical lens 100 is positioned on the light-reflecting path of the light-reflecting element 90, and the photosensitive component 80 receives the light transmitted from the optical lens 100 and forms an image. Specifically, the light-emitting direction of the light-reflecting element 90, the axial direction of the optical lens 100, and the normal direction of the photosensitive component 80 are all arranged along the optical axis. The light-reflecting element 90 is located inside the fixing part 10 near the light incident side, the optical lenses 100 are all located in the central region inside the fixing part 10, and the photosensitive component 80 is located inside the fixing part 10 away from the light incident side. The camera module provided in this application is easy to assemble and has good pre-stress consistency within the camera module.

[0164] In some embodiments of this application, the light-deflecting element 90 has an incident surface and an exit surface that intersect, and the light-deflecting element 90 changes the propagation direction of light to fold the optical path. The optical lens 100 extends along the optical axis and has a lens mounting hole, with at least one optical lens distributed within the lens mounting hole along the optical axis, thereby achieving the focusing effect of the optical lens 100 on light. After receiving the focused light, the photosensitive component 80 converts the received light signal into an electrical signal for imaging processing.

[0165] In some embodiments, the number of optical lenses 100 can be two, wherein one optical lens 100 can be fixed, and the other optical lens 100 can be driven and moved along the optical axis to achieve optical focusing and optical zoom functions. Of course, in this example, both optical lenses 100 can also be driven to move along the optical axis to achieve optical focusing and optical zoom functions. Further, the number of optical lenses 100 can be three, wherein two optical lenses 100 can be fixed, and the other optical lens 100 can be driven to move along the optical axis to achieve optical focusing and optical zoom functions. Of course, in this example, one optical lens 100 can be fixed, and the other two optical lenses 100 can be driven to move along the optical axis to achieve optical focusing and optical zoom functions. In other specific embodiments of this application, the number of optical lenses 100 can also be four, five, etc., and is not limited to this application.

[0166] In some embodiments, the photosensitive assembly 80 further includes a chip circuit board, a photosensitive chip, a filter element, and a filter element holder. The photosensitive chip is disposed and connected to the chip circuit board. The filter element holder is located around the photosensitive chip and disposed on the chip circuit board. The filter element holder and the chip circuit board are either integrally formed or have a separate structure. The filter element is mounted on the filter element holder to maintain the photosensitive path of the photosensitive chip and to filter the imaging light entering the photosensitive chip.

[0167] This application can also provide a camera module, such as Figure 1 As shown, it includes:

[0168] The drive device as described above;

[0169] Optical deflector element 90 used to deflect incident light rays.

[0170] Optical lens 100 is held on the light-transformation path of light-transformation element 90;

[0171] The photosensitive element 80 is used to receive light from the optical lens 100.

[0172] This application also provides a method for assembling a camera module, such as... Figures 11 to 14 As shown, it includes the following steps:

[0173] S1. Provide a fixing part 10;

[0174] S2. A movable part 20 is provided and installed in the fixed part 10. The movable part 20 is used to support the optical lens 100, and the optical lens 100 defines an optical axis.

[0175] S3. Provide a piezoelectric actuator 30, a pre-compression component 40, and a pressure block 50, and assemble the piezoelectric actuator 30, the pre-compression component 40, and the pressure block 50 to form a pre-compression drive assembly, wherein the pre-compression component 40 is disposed between the piezoelectric actuator 30 and the pressure block 50, the piezoelectric actuator 30 is mounted on the pre-compression component 40, the pressure block 50 is coupled to the pre-compression component 40, and provides a deformable preset space for the pre-compression component 40;

[0176] S4. The pre-pressure drive assembly is installed on the fixed part 10 in a direction perpendicular to the optical axis and the drive assembly is located on top of the movable part 20. The pressure block 50 is fixed to the fixed part 10. The pre-pressure member 40 applies a pre-pressure perpendicular to the optical axis (i.e., the second direction) to the piezoelectric actuator 30. The piezoelectric actuator 30 and the movable part 20 abut against each other under the action of the pre-pressure, and the piezoelectric actuator 30 and the movable part 20 make frictional contact.

[0177] By installing a piezoelectric actuator 30 at the top of the movable part 20, the support structure can be located only at the bottom of the movable part 20 for support, eliminating the need for additional support structures at the top or sides of the movable part 20. This reduces the number of support structures and enhances assembly consistency and accuracy. Furthermore, since the assembly process proceeds layer by layer from bottom to top, the assembly process is further simplified, reducing assembly tolerances.

[0178] In some embodiments, a method for assembling a camera module, step S1 further includes the following steps:

[0179] S11. A fixing part 10 and a first magnetic member 71 are provided, the first magnetic member 71 being disposed on the fixing part 10.

[0180] In some embodiments, a method for assembling a camera module, step S2 further includes the following steps:

[0181] S21. A second magnetic member 72 is provided, and the second magnetic member 72 is disposed in the movable part 20;

[0182] S22. A first support portion 61 and a second support portion 62 are provided. The first support portion 61 is assembled on the first guide rail 111, and the second support portion 62 is assembled on the second guide rail 131. The second magnetic suction member 72 and the first magnetic suction member 71 are arranged opposite to each other along the second direction and interact to generate a magnetic attraction force. The magnetic attraction force causes the movable part 20 and the fixed part 10 to clamp the first support portion 61 and the second support portion 62.

[0183] In some embodiments, a method for assembling a camera module, step S3 further includes the following steps:

[0184] S31. First, fix the pre-compression component 40 and the piezoelectric actuator 30, and then couple the pre-compression component 40 to the pressure block 50 to form a pre-compression drive assembly. In this way, the pre-compression component 40 can be assembled with the piezoelectric actuator 30 together with the pressure block 50, reducing the assembly difficulty.

[0185] Specifically, in step S31, the pre-compression member 40 includes two fixed ends 41, an elastic part 42, and two bent parts 43. The two bent parts 43 are respectively disposed between the two fixed ends 41 and the elastic part 42 and respectively connect the elastic part 42 and the two fixed ends 41. The pre-compression member 40 is fixed to the pressure block 50 through the two fixed ends 41, and the piezoelectric actuator 30 is installed on the pre-compression member 40 by being fixed to the elastic part 42.

[0186] It is worth mentioning that, in other embodiments of this application, the pre-compression member 40 and the pressure block 50 may be fixed first in step S3. Specifically, step S3 includes:

[0187] S31b First, the pre-compression component 40 is coupled to the pressure block 50, and then the piezoelectric actuator 30 is installed on the pre-compression component 40 to form a pre-compression drive assembly.

[0188] Furthermore, in some embodiments, step S4 further includes the step of:

[0189] S41. The lower pressure arm 52 of the pressure block 50 is installed on the fixed part 10. The friction head 32 of the piezoelectric actuator 30 is facing and abutting against the first movable side wall 21 of the movable part 20. The pressure block 50 keeps the first movable side wall 21 between the friction head 32 of the piezoelectric actuator 30 and the first support part 61. The first support part 61 provides the movable part 20 with a support force in the second direction.

[0190] S42, the pre-compression member 40 deforms under the action of the pressure block 50 and the first support part 61, providing a pre-compression force that is opposite to the support force and in the same direction as the downward force.

[0191] Specifically, in step S41, the pressure block 50 is installed in the first receiving groove 112 of the fixing part 10.

[0192] Furthermore, after assembling the piezoelectric actuator 30, the pre-pressing component 40, and the pressure block 50, the pressure block 50 is then assembled onto the fixed part 10 to complete the assembly process. This simplifies the entire assembly process and further reduces the problems of tilting of the moving part 20 and poor assembly consistency of the camera module caused by assembly errors.

[0193] It should be understood that the above assembly method can also be applied to Figures 15 to 22 In the modified embodiment shown, in step S31, the pre-compression member 40 further includes an intermediate connector 44, which is fixed to the elastic part 42, thereby fixing the elastic part 42 to the piezoelectric actuator 30 through the intermediate connector 44.

[0194] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A driving device, characterized in that, include: The movable part is used to support an optical lens, which defines an optical axis; A fixed part, wherein the movable part is movably disposed within the fixed part; A piezoelectric actuator, which makes frictional contact with the top of the movable part, is used to drive the movable part to move along the optical axis. A preload element is disposed on the top of the piezoelectric actuator and applies a preload perpendicular to the optical axis to the moving part; A pressure block, coupled to the pre-compression member, is designed to be installed from the top onto the fixing part. The pressure block includes a lower pressure beam and two lower pressure arms, which are located at both ends of the lower pressure beam. The pressure block is installed on the fixing part by fixing the two lower pressure arms to the fixing part. A groove is formed between the lower pressure beam and the two lower pressure arms, which provides a preset space for the deformation of the pre-compression member.

2. The driving device according to claim 1, characterized in that, The movable part includes a first movable sidewall located on a first side and a second movable sidewall located on a second side. The pressure block, the pre-pressure member, and the piezoelectric actuator are sequentially located above the first movable sidewall along a second direction, wherein the second direction is perpendicular to the optical axis direction.

3. The driving device according to claim 2, characterized in that, The bottom surface of the lower pressure arm is lower than the bottom surface of the lower pressure beam.

4. The driving device according to claim 3, characterized in that, Each of the pressure arms includes a pressure mounting platform and a pressure fixing platform. The two pressure fixing platforms of the two pressure arms are located outside the two pressure mounting platforms along the optical axis direction. The distance between the two pressure fixing platforms along the second direction is greater than the distance between the two pressure mounting platforms along the second direction. The groove is formed between the two pressure mounting platforms and the pressure beam. The pre-compression member is installed on the two pressure mounting platforms. The two pressure fixing platforms are respectively fixed to the fixing part.

5. The driving device according to claim 4, characterized in that, The pressing mounting platforms of the two pressing arms are respectively spaced apart from the fixing part, and there is a gap between the two pressing mounting platforms and the fixing part.

6. The driving device according to claim 3, characterized in that, Viewed along the optical axis, the lowering crossbeam is spaced apart from the first movable sidewall of the movable part, and the lowering arm is spaced apart from the first movable sidewall of the movable part.

7. The driving device according to claim 2, characterized in that, The device further includes a first support portion disposed between the fixed portion and the movable portion along a second direction. The top and bottom of the first movable sidewall of the movable portion maintain frictional contact with the piezoelectric actuator and the first support portion, respectively. The first support portion provides a supporting force to the movable portion along the second direction. The pre-pressing member deforms under the action of the pressing block and the first support portion to generate the pre-pressure along the second direction, wherein the direction of the pre-pressure is opposite to the direction of the supporting force.

8. The driving device according to claim 7, characterized in that, The dimension of the pressure block along the optical axis is larger than the dimension of the first support portion along the optical axis; in the optical axis direction, the projection of the first support portion along the second direction is entirely within the projection range of the pressure block along the second direction.

9. The driving device according to claim 8, characterized in that, The fixing part includes a first fixing sidewall located on a first side, a second fixing sidewall located on a second side, and a fixing body connecting the first fixing sidewall and the second fixing sidewall. The bottom surface of the first movable sidewall is provided with a first guide groove, and the bottom of the first fixed sidewall is provided with a first guide rail. The first support part is installed between the first guide groove and the first guide rail. The size of the pressure block along the optical axis is larger than the size of the first guide groove along the optical axis, and in the optical axis direction, the projection of the first guide groove along the second direction is entirely within the projection range of the pressure block along the second direction.

10. The driving device according to claim 9, characterized in that, The piezoelectric actuator includes a piezoelectric active part and a friction head connected to each other. Under the action of the pre-pressure member, the friction head and the first movable sidewall always maintain frictional contact. The position of the friction head acting on the first movable sidewall is aligned with the cross-sectional center of the first support part in a second direction.

11. A camera module, characterized in that, include: The drive device as described in any one of claims 1 to 10; Optical deflector element used to deflect incident light rays An optical lens, wherein the optical lens is held on the light-reversing path of the light-reversing element; A photosensitive component for receiving light from the optical lens.

12. A method for assembling a drive device, characterized in that, Including the following steps: S1. Provide a fixing part; S2. A movable part is provided, which is movably installed in the fixed part, wherein the movable part is used to carry an optical lens, the optical lens defining an optical axis; S3. A piezoelectric actuator, a pre-pressing component, and a pressing block are provided. The piezoelectric actuator, the pre-pressing component, and the pressing block are assembled to form a pre-pressing drive assembly. The pre-pressing component is disposed between the piezoelectric actuator and the pressing block. The piezoelectric actuator is mounted on the pre-pressing component. The pressing block is coupled to the pre-pressing component. The pressing block includes a lower pressing beam and two lower pressing arms. The two lower pressing arms are respectively located at both ends of the lower pressing beam. The pressing block is mounted on the fixing part by fixing the two lower pressing arms to the fixing part. A groove is formed between the lower pressing beam and the two lower pressing arms. The groove provides a pre-defined space for deformation of the pre-pressing component. S4. Install the preload drive assembly onto the fixed part in a direction perpendicular to the optical axis and position the drive assembly on top of the movable part.

13. The assembly method of the drive device according to claim 12, characterized in that, Step S3 further includes the following steps: S31. First, the pre-compression component is coupled to the pressure block, and then the piezoelectric actuator is installed on the pre-compression component to form the pre-compression drive assembly.

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