Driving device and camera module thereof

Abstract

The invention discloses a driving device and a camera module thereof, and the driving device comprises a movable part which is used for bearing an optical lens, the optical lens defines an optical axis, the movable part comprises a first movable side wall and a second movable side wall which are opposite to each other, and the second movable side wall is provided with a slot; a fixed part, wherein the movable part is movably arranged in the fixed part; the piezoelectric actuator is in frictional contact with the top of the first movable side wall and used for driving the movable part to move in the optical axis direction; the pre-pressing piece is arranged at the top of the piezoelectric actuator and applies pre-pressing force perpendicular to the optical axis direction to the first movable side wall; the damping structure comprises a damping support and a damping piece, the damping support is arranged on the fixing part, the damping piece extends towards the second movable side wall from the plane where the damping support is located, and at least one part of the damping piece extends into the open groove of the second movable side wall.

Description

Technical Field

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

[0002] As electronic devices continue to evolve towards miniaturization and higher performance, camera modules, as a standard feature of electronic devices, are facing increasingly stringent user demands for both small size and high imaging capabilities. To further enhance the user experience, the industry is actively pursuing compact camera module designs and integrated functionality. Through technological innovation and functional integration, the industry is continuously driving the development of more compact and intelligent camera modules, further enabling features such as autofocus, zoom, image stabilization, and telephoto.

[0003] A periscope camera module is a specialized camera module that uses a light-path redirection element to alter the light path, allowing it to be placed horizontally inside electronic devices such as mobile phones. This solves the problem of excessive telephoto lens optical length leading to excessive height. This design allows the camera to provide a longer focal length and higher zoom capability without increasing the module's thickness. Summary of the Invention

[0004] One purpose of the present application is to provide a driving device and a camera module thereof, which can prevent the movable part from continuing to move by setting a damping structure to provide buffering on the side without the piezoelectric actuator, and can also buffer the impact caused by the collision of the movable part and reduce noise.

[0005] Another object of the present application is to provide a driving device and a camera module thereof, which help prevent the optical lens from tipping over and further enhance the stability of the optical lens.

[0006] Another object of the present application is to provide a driving device and a camera module thereof, which simplify the assembly difficulty and further shorten the production time by optimizing the assembly process of the camera module.

[0007] To achieve the above objectives, the technical solution adopted in this application is a driving device for a periscope camera module, which includes: A movable portion, configured to carry an optical lens, wherein the optical lens defines an optical axis, the movable portion comprising a first movable side wall and a second movable side wall opposite to each other, wherein the second movable side wall has a slot; a fixed portion, wherein the movable portion is movably disposed within the fixed portion; a piezoelectric actuator, in frictional contact with the top of the first movable side wall, for driving the movable portion to move along the optical axis; a pre-pressing member, disposed on top of the piezoelectric actuator and applying a pre-pressing force perpendicular to the optical axis to the first movable side wall; The damping structure includes a damping bracket and a damping member, wherein the damping bracket is arranged on the fixing portion, and the damping member extends from the plane where the damping bracket is located toward the second movable side wall, and at least a portion of the damping member extends into the slot of the second movable side wall.

[0008] Preferably, the damping bracket includes a main body, a mounting portion and a side connecting portion, the mounting portion is located at both ends of the main body, the plane where the main body is located is parallel to the optical axis direction, the plane where the mounting portion is located is perpendicular to the optical axis direction, the side connecting portion is bent and extended from the plane where the main body is located along a second direction, the plane where the side connecting portion is located is perpendicular to the plane where the main body is located and the plane where the mounting portion is located, wherein the second direction is perpendicular to the optical axis direction.

[0009] Preferably, the fixing portion includes a first fixed side wall and a second fixed side wall relative to each other, the second fixed side wall has an opening, at least a portion of the second movable side wall is located in the opening, the mounting portion is fixed to the second fixed side wall, and the main body portion covers the opening.

[0010] Preferably, the damping member includes a first part and a second part, the first part is connected to the main body of the damping bracket, the second part is connected to the first part, and the second part does not contact the main body of the damping bracket, wherein the length of the second part along the optical axis is smaller than the length of the first part along the optical axis.

[0011] As a preference, the length of the second portion along the optical axis is smaller than the length of the slot along the optical axis.

[0012] As a preference, the height of the second portion along the second direction is greater than the height of the first portion along the second direction.

[0013] As a preference, the height of the second portion along the second direction is smaller than the height of the slot along the second direction.

[0014] Preferably, along the second direction, at least a portion of the main body abuts against the top of the second fixed side wall, and a certain gap is formed between at least a portion of the main body and the top of the second movable side wall.

[0015] Preferably, the first portion includes a top surface and a bottom surface opposite to each other along the second direction, and a gap is defined between the bottom surface of the first portion and the top of the second movable sidewall.

[0016] Preferably, the slot of the second movable side wall has an inner side wall parallel to the second direction, the second portion of the damping member has an inner surface parallel to the second direction, and a gap is formed between the inner side wall and the inner surface.

[0017] Preferably, when the movable portion moves along the optical axis, the inner side wall of the groove contacts the inner surface of the second part, and the second part moves or deforms toward the side where the inner side wall is not in contact with the inner surface under the action of force.

[0018] To achieve one of the objectives of this application, the technical solution adopted in this application is a camera module, which includes: Any of the above drive devices; Light deflection element for deflecting incident light. an optical lens, wherein the optical lens is held on a light deflection path of the light deflection element; The photosensitive component is used to receive light from the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the camera module in some embodiments of the present application.

[0020] Figure 2 This is a schematic diagram of the explosion structure of the camera module in some embodiments of the present application.

[0021] Figure 3 This is a schematic diagram of the exploded structure of the driving device in some embodiments of the present application.

[0022] Figure 4 Schematic diagram of the explosion structure of the camera module in other embodiments of the present application.

[0023] Figure 5 Schematic diagram of the cross-sectional structure of the driving device in the optical axis direction and the second direction in some embodiments of the present application.

[0024] Figure 6 Schematic diagram of the cross-sectional structure of the driving device in the optical axis direction and the second direction in other embodiments of the present application.

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the camera module in the first direction and the second direction in some embodiments of the present application.

[0026] Figure 8 This is a bottom-up schematic diagram of the camera module structure in some embodiments of the present application.

[0027] Figure 9 This is a bottom-up schematic diagram of the camera module structure in other embodiments of the present application.

[0028] Figure 10 This is a bottom-up schematic diagram of the camera module structure in some other embodiments of the present application.

[0029] Figure 11 for Figure 6 Schematic diagram of the assembly process of the first supporting portion, the second supporting portion and the fixing portion of the driving device in the illustrated embodiment.

[0030] Figure 12 for Figure 6 Schematic diagram of the assembly process of the movable part of the driving device in the embodiment shown.

[0031] Figure 13 for Figure 6 Schematic diagram of the assembly process of the piezoelectric actuator and pre-stressed member of the driving device in the embodiment shown.

[0032] Figure 14 for Figure 6 Schematic diagram of the assembly process of the pressing block and the pre-pressing member of the driving device in the embodiment shown.

[0033] Figure 15 This is an exploded schematic diagram of the upper cover and the fixing portion of the driving device in a modified embodiment of the present application.

[0034] Figure 16 This is an exploded diagram of a driving device in a modified embodiment of the present application with the upper cover removed.

[0035] Figure 17 Schematic cross-sectional view of the damping structure in some embodiments of the present application.

[0036] Figure 18 Schematic diagram of deformation of the damping structure in some embodiments of the present application.

[0037] Figure 19 Schematic diagram of the structure of the damping structure in some embodiments of the present application.

[0038] Figure 20 Schematic top view of the piezoelectric actuator, pre-pressing member, and pressing block of the driving device in a modified embodiment of the present application.

[0039] Figure 21 This is a bottom view of a piezoelectric actuator, a pre-pressed component, and a pressure block of a driving device in a modified embodiment of the present application.

[0040] Figure 22 Schematic diagram of the cross-sectional structure of the driving device in a modified embodiment of the present application in the optical axis direction and the second direction.

[0041] Figure 23 Schematic diagram of the cross-sectional structure of the driving device in a first direction in a modified embodiment of the present application.

[0042] Figure 24 It is a bottom view schematic diagram of the movable portion of the driving device in a modified embodiment of the present application.

[0043] In the figure: 10, fixed portion; 11, first fixed side wall; 111, first guide rail; 112, first accommodating groove; 113, second accommodating groove; 114, base extension; 1141, second mounting plane; 12, fixed body; 13, second fixed side wall; 131, second guide rail; 132, opening; 14, conducting member; 141, conducting portion; 20, movable portion; 21, first movable side wall; 211, first guide groove; 22, friction portion; 23, first Second movable side wall; 231, second guide groove; 232, slot; 2321, first inner side wall; 2322, second inner side wall; 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-pressing part; 41, fixed end; 411, fixing hole; 42, elastic part; 43, bending part; 50, pressing block; 51, pressing Beam; 52, lower pressure arm; 521, lower pressure fixing platform; 522, lower pressure mounting platform; 523, first mounting plane; 524, mounting column; 500, groove; 61, first supporting portion; 62, second supporting portion; 70, magnetic component; 71, first magnetic member; 711, base portion; 712, supporting portion; 72, second magnetic member; 80, photosensitive component; 90, light turning element; 100, optical lens; 3331, first sub-connecting portion; 3 332. Second sub-connecting portion; 335. Shaping member; 421. Connecting hole; 44. Intermediate connecting member; 441. Connecting column; 53. Structural reinforcement member; 120. Upper cover; 150. Damping structure; 151. Damping bracket; 1511. Main body; 1512. Mounting portion; 1513. Side connecting portion; 152. Damping member; 1521. First portion; 1522. Second portion; 15221. First inner surface; 15222. Second inner surface. DETAILED DESCRIPTION

[0044] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0045] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which 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, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0046] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0047] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0048] According to one aspect of the present application, a driving device for a camera module is provided, such as Figures 1 to 24 As shown, the driving device can be applied to camera modules, especially to periscope camera modules that require a large motor driving force. Furthermore, the driving device includes a movable part 20, a fixed part 10, a piezoelectric actuator 30, a pre-pressed part 40, a pressure block 50 and a damping structure 150, wherein the movable part 20 is used to support the optical lens 100, and the optical lens 100 defines an optical axis. The movable part 20 includes a first movable side wall 21 and a second movable side wall 23 opposite to each other, wherein the second movable side wall 23 has a groove 232; the movable part 20 is movably arranged in the fixed part 10; the piezoelectric actuator 30 and the top friction of the first movable side wall 21 The piezoelectric actuator 30 is provided on the first movable sidewall 21 and is used to drive the movable portion 20 to move along the optical axis. The pre-compression member 40 is disposed on top of the piezoelectric actuator 30 and applies a pre-compression force perpendicular to the optical axis to the first movable sidewall 21. The damping structure 150 includes a damping bracket 151 and a damping member 152. The damping bracket 151 is disposed on the fixed portion 10. The damping member 152 extends from the plane of the damping bracket 151 toward the second movable sidewall 23. At least a portion of the damping member 152 extends into the slot 232 of the second movable sidewall 23. The present application provides a damping structure 150 to provide a buffer on the side without the piezoelectric actuator 30, thereby preventing the movable portion 20 from further moving, absorbing and buffering the impact caused by the collision of the movable portion 20, and reducing noise.

[0049] Among them, Figure 1 As shown, the optical lens 100 defines an optical axis, which is perpendicular to the first direction and the second direction. Specifically, the first direction is defined as the width direction of the periscope camera module arranged along the Y axis, the second direction is defined as the height direction of the periscope camera module arranged along the Z axis, and the optical axis direction is defined as the length direction of the periscope camera module arranged along the X axis. In particular, along the second direction, the periscope camera module includes relative top and bottom parts, and along the optical axis direction, the periscope camera module includes relative light incident side and light exit side. It can be understood that the setting of this coordinate system is also applicable to other variant embodiments of the present application.

[0050] In some embodiments, the piezoelectric actuator 30 is positioned atop at least a portion of the movable portion 20 along a second direction. At least a portion of the pre-compression 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-compression member 40 to generate a pre-compression force along the second direction, causing the piezoelectric actuator 30 and the movable portion 20 to abut under the action of the pre-compression force. The second direction is perpendicular to the optical axis. By positioning the pre-compression member 40 and the pressure block 50 above the height of the camera module along the Z-axis, coupling the pre-compression member 40 with the pressure block 50, and designing the pressure block 50 to be mounted from the top of the fixed portion 10 for assembly, this simplifies the assembly process of the camera module, further reduces tilting of the movable portion 20 and poor camera module consistency caused by assembly errors, thereby improving the imaging stability of the camera module. Furthermore, the pressure block 50 can adjust the degree of deformation of the pre-compression member 40 to adjust the magnitude of the pre-compression force, thereby improving the performance of the drive device. Furthermore, the pressing block 50 can also protect the pre-pressed part 40 , thereby preventing the pre-pressed part 40 from interfering with other components in the driving device during the deformation process, thereby preventing the performance of the pre-pressed part 40 from being affected.

[0051] refer to Figure 2 、 Figure 3 、 Figure 15 and Figure 16It can be seen that in some embodiments, the piezoelectric actuator 30 includes a piezoelectric active part 31 and a friction head 32 that are interconnected. Since the pre-pressing member 40 applies a downward preload in the second direction to the piezoelectric actuator 30, it helps to keep the movable part 20 and the friction head 32 in the piezoelectric actuator 30 in friction contact at all times, which is conducive to driving the movable part 20 to move along the optical axis after the piezoelectric active part 31 receives the voltage, reducing the shaking and tilt of the optical lens 100 during the driving process, thereby improving the imaging accuracy and imaging stability of the camera module during autofocus. It can be understood that by keeping the movable part 20 and the friction head 32 in contact with each other, 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 in the focusing process. Furthermore, while helping to improve the driving force provided by the piezoelectric actuator 30, it also enhances the stability of the camera module, reduces image jitter, and thus improves imaging quality.

[0052] It should be understood that when the movable portion 20 is driven by the piezoelectric actuator 30 to move along the optical axis, the piezoelectric actuator 30 is located on the same side as the first movable sidewall 21 and on the opposite side from the second movable sidewall 23. This means that when the piezoelectric actuator 30 stops driving, the self-locking function of the piezoelectric actuator 30 allows the first movable sidewall 21 to stop moving immediately, while the second movable sidewall 23, due to inertia, tends to continue moving. Alternatively, if the movable portion 20 is already tilted, the displacement of the second movable sidewall 23 may be greater than that of the first movable sidewall 21. This not only makes the second movable sidewall 23 susceptible to damage by colliding with the fixed portion 10, but also causes the movable portion 20 to tilt, thereby affecting the subsequent driving performance of the driving device. Furthermore, if the driving device is dropped or hit, the self-locking function of the piezoelectric actuator 30 cannot resist external impact, causing the movable portion 20 to move under the influence of external impact and collide with the fixed portion 10.

[0053] To solve the above problems, Figure 15 、 Figures 17 to 19As shown, a damping structure 150 is provided in the present application. The damping structure 150 includes a damping bracket 151 and a damping member 152, wherein the damping bracket 151 is provided on the fixing portion 10, and the damping member 152 extends from the plane where the damping bracket 151 is located toward the second movable side wall 23, so that the second movable side wall 23 can contact the damping member 152. The damping member 152 absorbs or eliminates the impact caused by the contact with the second movable side wall 23, and can also reduce noise. Specifically, the damping bracket 151 includes a main body 1511 and mounting portions 1512 located at both ends of the main body 1511, wherein the plane where the main body 1511 is located is parallel to the optical axis direction, and the plane where the mounting portion 1512 is located is perpendicular to the optical axis direction. It should be understood that the mounting portion 1512 can be formed by bending the main body 1511.

[0054] Furthermore, the fixed portion 10 includes a first fixed sidewall 11 located on the first side and a second fixed sidewall 13 located on the second side, wherein the first fixed sidewall 11 and the second fixed sidewall 13 are opposite to each other, the first fixed sidewall 11 is opposite to the first movable sidewall 21 of the movable portion 20, and the second fixed sidewall 13 is opposite to the second movable sidewall 23 of the movable portion 20. The second fixed sidewall 13 has an opening 132, and at least a portion of the second movable sidewall 23 is disposed within the opening 132 of the second fixed sidewall 13 to reduce the size of the drive device. In one embodiment, the top of the second fixed sidewall 13 faces the socket at the top of the drive device, and the mounting portion 1512 is disposed within the socket to enable the damping bracket 151 to be fixed to the second fixed sidewall 13. In another embodiment, the second fixed sidewall 13 and the mounting portion 1512 can also be integrally formed to enable the damping bracket 151 to be fixed to the second fixed sidewall 13.

[0055] There are two mounting portions 1512, each fixed to a portion of the second fixed sidewall 13 near the light incident side and the light exit side, respectively. The main body 1511 extends along the optical axis between the two mounting portions 1512, covering the opening 132 of the second fixed sidewall 13 and located on top of the second movable sidewall 23. Along the second direction, at least a portion of the main body 1511 abuts the top of the second fixed sidewall 13. A certain gap exists between at least a portion of the main body 1511 and the top of the second movable sidewall 23, providing sufficient space for the damping member 152.

[0056] In some embodiments, the damping member 152 is formed in the main body 1511 of the damping bracket 151 and extends from the main body 1511 toward the second movable sidewall 23, such that at least a portion of the damping member 152 is accommodated in the gap between the main body 1511 and the top of the second movable sidewall 23. The damping member 152 includes a first portion 1521 connected to the main body 1511 of the damping bracket 151 and a second portion 1522 connected to the first portion 1521, with the second portion 1522 not contacting the main body 1511. The first portion 1521 has a length along the optical axis and a height along the second direction. The length of the first portion 1521 is greater than the height of the first portion 1521. For example, the length of the first portion 1521 is less than or equal to the length of the opening 132 of the second fixed sidewall 13 along the optical axis, so that the first portion 1521 can largely fill the opening 132 along the optical axis. As mentioned above, when the driving device is dropped or impacted, the movable portion 20 may move in the second direction under the impact force, causing the movable portion 20 to separate from the fixed portion 10, which may in turn cause a collision between the top of the movable portion 20 and the upper cover 120. However, if the first portion 1521 of the damping member 152 is sufficiently long along the optical axis, the first portion 1521 of the damping member 152 can contact the movable portion 20 regardless of its position within the fixed portion 10 when it is dropped or impacted, thereby absorbing or dissipating the impact, reducing the risk of damage to the movable portion 20, and reducing noise.

[0057] Furthermore, the first portion 1521 of the damping member 152 includes a top surface and a bottom surface that are opposite to each other along the second direction. The bottom surface of the first portion 1521 is spaced apart from the top of the second movable sidewall 23, i.e., a gap exists between the bottom surface of the first portion 1521 and the top of the second movable sidewall 23. This ensures that when the drive device is operating normally, the top of the second movable sidewall 23 and the bottom surface of the first portion 1521 do not contact each other, thereby preventing the first portion 1521 from affecting the movement of the movable portion 20. In the event of a fall or impact, the bottom surface of the first portion 1521 and the top of the second movable sidewall 23 will come into contact, providing a buffering effect through the first portion 1521.

[0058] In some embodiments, the second movable sidewall 23 has a slot 232 that opens toward the top of the driving device. The second portion 1522 of the damping member 152 extends from the first portion 1521 toward the slot 232 of the second movable sidewall 23. At least a portion of the second portion 1522 of the damping member 152 is located within the slot 232 of the second movable sidewall 23. In other words, along the optical axis, the second portion 1522 of the damping member 152 overlaps with the second movable sidewall 23. Specifically, the slot 232 of the second movable sidewall 23 has an inner sidewall parallel to the second direction, and the second portion 1522 of the damping member 152 has an inner surface parallel to the second direction. During the movement of the movable portion 20 within the fixed portion 10 along the optical axis, the inner surface of the second portion 1522 contacts the inner sidewall of the slot 232, thereby limiting further movement of the second movable sidewall 23 in the optical axis direction through the second portion 1522 of the damping member 152. This can also absorb or dissipate impact, reduce the risk of damage to the movable part, and reduce noise. Furthermore, when the second movable sidewall 23 contacts the second portion 1522 of the damping member 152, the second portion 1522, under the action of force, will move or deform toward the side of the second movable sidewall 23 that is not in contact with the second portion 1522. Since the space on the side of the second movable sidewall 23 that is not in contact with the second portion 1522 is larger, the second portion 1522 can absorb or dissipate the impact caused by the contact to a greater extent through greater deformation, thereby better reducing noise.

[0059] The length of the second portion 1522 along the optical axis is shorter than the length of the first portion 1521 along the optical axis, so that the second portion 1522 can extend into the slot 232 of the second movable sidewall 23. Furthermore, the length of the second portion 1522 along the optical axis is shorter than the length of the slot 232 along the optical axis, so that when no collision occurs, there is a gap between both inner surfaces of the second portion 1522 and both inner sidewalls of the slot 232. The two inner surfaces of the second portion 1522 may include a first inner surface 15221 and a second inner surface 15222, and the two inner sidewalls of the slot 232 include a first inner sidewall 2321 and a second inner sidewall 2322. The first inner surface 15221 is opposite to the first inner sidewall 2321 along the optical axis, and the second inner surface 15222 is opposite to the second inner sidewall 2322 along the optical axis. It should be understood that when the movable portion 20 moves along the optical axis toward the light-emitting side, the first inner surface 15221 contacts the first movable sidewall 21, and the second portion 1522 of the damping member 152 moves or deforms toward the light-emitting side. As the distance between the second inner surface 15222 and the second movable sidewall 23 increases, the second portion 1522 can absorb or dissipate the impact caused by the contact to a greater extent through greater deformation, thereby further reducing noise. Similarly, when the movable portion 20 moves along the optical axis toward the light-incident side, the second portion 1522 can also absorb or dissipate the impact caused by the contact to a greater extent through greater deformation, thereby further reducing noise.

[0060] In some embodiments, the height of the second portion 1522 along the second direction is greater than the height of the first portion 1521 along the second direction. This, on the one hand, prevents the gap between the top of the second movable sidewall 23 and the damping bracket 151 from increasing due to the increased height of the first portion 1521, thereby preventing an increase in the height of the driving device. On the other hand, this ensures that the second portion 1522 can extend into the slot 232 of the second sidewall, allowing it to collide with the inner sidewall of the slot 232. Furthermore, the height of the second portion 1522 along the second direction is less than the height of the slot 232 along the second direction to prevent interference between the second portion 1522 and the slot 232. Furthermore, it should be understood that if the height of the second portion 1522 along the second direction is too great, when the second portion 1522 is deformed by an external force, insufficient space may cause the second portion 1522 to contact the inner sidewall of the slot 232, resulting in interference and thus affecting the cushioning effect.

[0061] In some embodiments, the damping bracket 151 further includes a side connection portion 1513, wherein the plane of the side connection portion 1513 is perpendicular to the plane of the main body 1511 and the plane of the mounting portion 1512. The side connection portion 1513 is bent along the second direction from the plane of the main body 1511 to the side of the second fixed side wall 13 in the middle of the main body 1511, and the side connection portion 1513 is fixedly connected to the side of the second fixed side wall 13. As mentioned above, when the driving device falls or is hit, the second movable side wall 23 may move along the second direction and collide with the first portion 1521 and the damping bracket 151. When the damping bracket 151 is fixed to the fixed portion 10 only by the mounting portions 1512 at both ends, the middle portion of the main body 1511 of the damping bracket 151 may be deformed due to the impact, thereby affecting the buffering effect of the damping member 152. In order to avoid the above situation, the present application connects the damping bracket 151 and the second fixed side wall 13 in the middle of the main body 1511 through the side connection part 1513, which can prevent the main body 1511 from deformation, thereby maintaining the flatness of the main body 1511 and avoiding affecting the buffering effect of the damping member 152.

[0062] In some embodiments, the first portion 1521 and the second portion 1522 of the damping member 152 may comprise an elastic material, a flexible material, or an injection material. For example, the first portion 1521 and the second portion 1522 may be formed of various materials including rubber, polyurethane, porous, and sponge. In various embodiments, the first portion 1521 and the second portion 1522 may be formed of the same material or may be formed of different materials.

[0063] refer to Figure 5 、 Figure 6 and Figure 22 It can be seen that in some embodiments, the fixed portion 10 is provided with a first accommodating groove 112 and a second accommodating groove 113. The first accommodating groove 112 and the second accommodating groove 113 are opened on the same side of the fixed body 12 along the second direction. The first accommodating groove 112 can be located in a communication manner above the second accommodating groove 113. The pressure block 50 is disposed in the first accommodating groove 112, and one side of the movable portion 20 is accommodated in the second accommodating groove 113. The dimension of the first accommodating groove 112 along the optical axis is greater than the dimension of the second accommodating groove 113 along the optical axis. Specifically, because the length dimension of the first accommodating groove 112 along the optical axis is greater than the length dimension of the second accommodating groove 113 along the optical axis, the pressure block 50 accommodated in the first accommodating groove 112 can be fixed to the fixed portion 10, further increasing the stability and reliability of the pressure block 50. Furthermore, the pressure block 50 is placed in the first accommodating groove 112, the movable part 20 is placed in the second accommodating groove 113, and the pre-pressed part 40 and the piezoelectric actuator 30 are arranged in sequence between the pressure block 50 and the movable part 20, making the structure more compact and increasing the space utilization inside the camera module.

[0064] It can be understood that the length of the second accommodating 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 when driven by the piezoelectric actuator 30 in the second accommodating groove 113.

[0065] Furthermore, if Figure 22 As shown, the pressing block 50 may further include a structural reinforcement 53 embedded therein to enhance the structural strength of the pressing block 50, with the structural reinforcement 53 exposed from the side of the pressing block 50. It should be understood that the structural reinforcement 53 may be embedded in both the lower pressing beam 51 and the lower pressing arm 52, or may be embedded only in the lower pressing beam 51. It should be understood that a damping material may also be fixed to the structural reinforcement 53 by gluing or integral molding, and the damping material may be formed between the lower pressing arm 52 and the movable portion 20 of the pressing block 50 to prevent direct collision between the movable portion 20 and the lower pressing arm 52, thereby preventing deformation of the lower pressing arm 52 and affecting the preload generated by the preload member 40.

[0066] Furthermore, the structural reinforcement 53 includes a transverse reinforcement structure embedded within the downward pressure beam 51 and a vertical reinforcement structure embedded within the downward pressure arm 52. Damping material is molded onto the vertical reinforcement structure, facing the light-entering side and / or light-emitting side of the movable portion 20. When the movable portion 20 moves along the optical axis, the first movable sidewall 21 can come into contact with the damping material, thereby limiting further movement of the first movable sidewall 21 along the optical axis. The damping material can also absorb or dissipate impact, reducing the risk of damage to the movable part and reducing noise.

[0067] In some embodiments, as Figure 4 and Figure 16As shown, the driving device further includes a first support portion 61, which is disposed between the fixed portion 10 and the movable portion 20 along the second direction. The upper portion and the lower portion of at least a portion of the movable portion 20 maintain frictional contact with the piezoelectric actuator 30 and the first support portion 61, respectively. In this driving device, the pre-compression 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 supporting force for the movable portion 20 in the second direction. The pre-compression member 40 is deformed under the combined action of the first support portion 61 and the pressure block 50, thereby providing a downward pre-compression force in the second direction. It should be understood that if the pressure block 50 is not fixed to the fixed part 10, the pre-pressed part 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-pressed part 40 and the piezoelectric actuator 30 to disengage from the movable part 20, thereby causing the pre-pressed part 40 to be unable to deform and generate pre-pressure, affecting the drive. In order to avoid the above situation, in this application, the pressure block 50 is fixedly connected to the fixed part 10, and then under the action of the first support part 61, the pressure block 50 will generate a downward pressure in the second direction due to the connection with the fixed part 10. On the one hand, it can prevent the pre-pressed part 40 and the pressure block 50 from disengaging; on the other hand, it can maintain the deformation generated by the pre-pressed part 40, thereby ensuring the generation of pre-pressure. The direction of the pre-pressure is the same as the direction of the downward pressure, which is opposite to the direction of the supporting force. It is understandable that if only a pre-pressure is applied to the top of the movable part 20 on one side, the risk of the movable part 20 tipping over may increase. 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, thereby reducing the risk of the movable part 20 tipping over.

[0068] In some embodiments, the pre-pressing member 40 deforms under the action of the pressing block 50 and the first support portion 61 to generate a pre-load. The pre-load is directed in the same direction as the downward force. Under this pre-load, the friction head 32 maintains frictional contact with the first movable sidewall 21 of the movable portion 20, facilitating stable driving force generated by the piezoelectric actuator 30.

[0069] In some embodiments, reference Figures 7 to 10 、 Figure 16 as well as Figure 23As shown, the driving device further includes a second supporting portion 62, which is arranged between the fixed portion 10 and the movable portion 20 along the second direction. The second supporting portion 62 and the first supporting portion 61 are arranged on both sides of the bottom of the fixed portion 10 along the first direction. The first direction is perpendicular to the second direction and the optical axis direction. The fixed portion 10 includes a first side and a second side opposite to each other. The first supporting portion 61 is arranged on the first side close to the piezoelectric actuator 30, and the first supporting portion 61 is tightly clamped between the movable portion 20 and the fixed portion 10. The second supporting portion 62 is arranged on the second side away from the piezoelectric actuator 30, and the second supporting portion 62 is loosely clamped between the movable portion 20 and the fixed portion 10.

[0070] Since the pre-compression member 40 is only provided on one side of the movable part 20, the supporting force provided by the second support portion 62 to the bottom of the other side of the movable part 20 further balances the pre-compression force generated on one side of the movable part 20. On the one hand, it avoids excessive friction generated by the surface contact between the movable part 20 and the fixed part 10, resulting in poor driving effect. On the other hand, the provision of the second support portion 62 is conducive to improving the parallelism of the movable part 20 during movement, further improving the stability of the optical lens 100, and enhancing the imaging quality of the camera module.

[0071] It can be understood that the first support portion 61 simultaneously fits tightly and abuts between the fixed portion 10 and the movable portion 20, while the second support portion 62, because it is loosely fitted between the fixed portion 10 and the movable portion 20, has a certain gap between it and the fixed portion 10 and / or the movable portion 20. This gap provides a certain preset 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, ensuring the parallelism of the movable portion 20 during movement. In the event that the movable portion 20 tilts, the gap between the second support portion 62 provides a certain margin for adjusting the position of the movable portion 20. Furthermore, when the movable portion 20 tilts to a certain extent, the abutment between the fixed portion 10 and the movable portion 20 corrects the movement of the movable portion 20, preventing it from tilting further, thereby preventing the tilt of the movable portion 20 from affecting driving performance. Furthermore, this arrangement facilitates assembly. A tight fit facilitates the installation and positioning of the movable portion 20, while a loose fit facilitates adjustment of the movable portion 20, further reducing assembly tolerances and improving the assembly accuracy of the camera module. It should be understood that in the present application, the tilting of the movable portion 20 includes: tilting in which the movable portion 20 has a tendency to rotate about the optical axis, tilting in which the movable portion 20 has a tendency to rotate about a first direction, and tilting in which the movable portion 20 has a tendency to rotate about a second direction.

[0072] In some embodiments, the first support portion 61 and the second support portion 62 can also be tightly fitted and abutted between the fixed portion 10 and the movable portion 20 at the same time, so that the first support portion 61 and the second support portion 62 always provide stable support to the movable portion 20 to ensure the parallelism of the movable portion 20 during movement and reduce the risk of the movable portion 20 tilting.

[0073] Furthermore, when the movable part 20 is driven to move along the optical axis, the main supporting component is the first supporting part 61, and the straight-line distance from the contact point between the friction head 32 and the movable part 20 to the first supporting 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 supporting part 62. Since the first supporting part 61 adopts a tight-fitting assembly method, the straight-line distance from the contact point between the friction head 32 and the movable part 20 to the first supporting 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-fitting and loose-fitting assembly methods can be considered through the tolerance value during the assembly process. For example, the tolerance between the first supporting part 61 and the movable part 20 and the fixed part 10 is relatively small, for example, 0.01, while the tolerance between the second supporting part 62 and the movable part 20 and the fixed part 10 is relatively large, for example, 0.02. At this time, when the movable portion 20 is not tilted, the first support portion 61 provides support for the movable portion 20. Only when the movable portion 20 tilts does the second support portion 62 provide support to the movable portion 20 to straighten the movable portion 20. This can reduce the possibility of the movable portion 20 tilting to a certain extent, helping to improve the imaging quality of the camera module.

[0074] In some embodiments, reference Figure 2 、 Figure 7 、 Figure 16 、 Figure 23As shown, a first movable sidewall 21 located on the first side and a second movable sidewall 23 located on the second side 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 positioned on top of the first movable sidewall 21 along the second direction. The first movable sidewall 21 is provided with a first guide groove 211 and a friction portion 22. The first guide groove 211 is defined on the bottom surface of the first movable sidewall 21 and is arranged opposite the first guide rail 111 along the second direction. The first support portion 61 is mounted between the first guide rail 111 and the first guide groove 211, such that the bottom surface of the first movable sidewall 21 abuts the first support portion 61. The friction portion 22 is mounted on the top surface of the first movable sidewall 21 and abuts the friction head 32 of the piezoelectric actuator 30. The first movable sidewall 21 is accommodated in the second accommodation groove 113. The second movable sidewall 23 is provided with a second guide groove 231, which is formed on the bottom surface of the second movable sidewall 23 and is arranged opposite to the second guide rail 131 along the second direction. The second support portion 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 the second support portion 62. By assembling the support portion structure between the guide rail and the guide groove structure, the support portion is stably clamped between the movable portion 20 and the fixed portion 10, thereby increasing the stability of the camera module.

[0075] In some embodiments, the fixing portion 10 further includes a first fixing sidewall 11 located on the first side, a second fixing sidewall 13 located on the 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 arranged on opposite sides of the fixing body 12 along the second direction. A first accommodating groove 112 and a second accommodating groove 113 are formed in the first fixing sidewall 11 along the second direction. The first accommodating groove 112 and the second accommodating groove 113 are located at the top of the first fixing sidewall 11, so that the pressing block 50 abuts 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. Among them, the first support part 61 is installed on the first guide rail 111 and supports the first side of the movable part 20, and the second support part 62 is installed on the second guide rail 131 and supports the second side of the movable part 20. The arrangement of the first support part 61 and the second support part 62 can reduce the friction resistance force encountered by the movable part 20 when it is driven to move, which is beneficial to improving the driving performance in the camera module. The first guide rail 111 and the second guide rail 131 are arranged flush on both sides of the fixed part 10 along the first direction, so that the first support part 61 and the second support part 62 are arranged relatively flush along the first direction, providing a stable support effect for the movable part 20. Further, as Figure 4As shown, since the piezoelectric actuator 30 drives the top of the movable portion 20, simply placing the first support portion 61 and the second support portion 62 flush with the bottom of the movable portion 20 can provide stable support for the movable portion 20, further ensuring greater stability when the movable portion 20 is driven along the optical axis. In other words, when the piezoelectric actuator 30 drives the movable portion 20, by providing support portions at the bottom of the movable portion 20 and on the side opposite the piezoelectric actuator 30, the movable portion 20 is clamped between the piezoelectric actuator 30 and the support portions, preventing the movable portion 20 from tilting during the driving process caused by the piezoelectric actuator 30. Furthermore, there is no need to provide additional support portions on the sides or top of the movable portion 20, thereby reducing the number of support portions in the camera module and optimizing the assembly process, further reducing assembly tolerances and increasing assembly consistency.

[0076] 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, and the support part may be in a rolling state or a sliding state, so that the friction between the support part and the movable part 20 may change. Since the support part can switch the movement state at will, reducing the number of support parts can reduce the risk of the movable part 20 tilting or overturning and the risk of the support part getting stuck, thereby enhancing the imaging performance of the camera module.

[0077] In some embodiments, the drive device further includes an embedded component, which is arranged on the abutment surface between the first guide rail 111 and the first support portion 61, and the embedded component provides a flatter support surface for the first support portion 61. Furthermore, the embedded component 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-shaped groove, the structure of the embedded component can also be V-shaped; if the first guide rail 111 is a U-shaped groove, the structure of the embedded component can also be U-shaped, or the structure of the embedded component can also be flat. On the one hand, it helps to reduce the wear of the first support portion 61 when it moves on the inside of the first guide rail 111, thereby extending the service life of the first support portion 61; it can also reduce the risk of the first support portion 61 getting stuck during use, further improving the quality and life of the camera module. On the other hand, it reduces the deformation phenomenon such as pits on the first support portion 61 caused by excessive force under the action of pre-pressure, further enhancing the reliability of the camera module.

[0078] In some embodiments, the driving device further includes an embedded component laid flat on the abutment surface between the second guide rail 131 and the second support portion 62 to enhance the support for the second support portion 62. The embedded component 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-shaped groove, the structure of the embedded component may also be V-shaped; if the second guide rail 131 is a U-shaped groove, the structure of the embedded component may also be U-shaped, or the structure of the embedded component may also be a plane. The embedded component structure can, on the one hand, help to reduce the wear of the second support portion 62 when it moves on the inner side of the second guide rail 131, thereby extending the service life of the second support portion 62; it can also reduce the risk of the second support portion 62 getting stuck during use, further improving the quality and life of the camera module.

[0079] In some embodiments, the contact surfaces of the first guide groove 211 and the second guide groove 231 in the movable portion 20 with the support portion structure are also provided with an embedded component structure. That is, the first support portion 61 is in contact with the embedded component in the first guide groove 211 and the embedded component provided in the first guide rail 111, respectively, and the second support portion 62 is in contact with the embedded component in the second guide groove 231 and the embedded component provided in the second guide rail 131, respectively. By providing the embedded component structure, the wear of the first support portion 61 when moving between the first guide rail 111 and the first guide groove 211, and the wear of the second support portion 62 when moving between the second guide groove 231 and the second guide rail 131 are reduced, thereby further improving the quality and life of the camera module. On the other hand, the deformation phenomenon such as pits on the first support portion 61 and the second support portion 62 caused by excessive force is reduced, thereby further enhancing the reliability of the camera module.

[0080] 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 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, thereby providing a larger support area on the same side of the piezoelectric actuator 30. It will be understood that the first support portion 61 is mounted within the first guide groove 211, and the second support portion 62 is mounted within the second guide groove 231. As described above, the length of the second movable side wall 23 along the optical axis can be less than the length of the first movable side wall 21 along the optical axis, thereby providing sufficient space for movement of the first support portion 61 and the second support portion 62. The support portions can be implemented as ball bearings or sliders.

[0081] In some embodiments, the movable portion 20 and / or the fixed portion 10 are provided with a guide structure suitable for mounting the support portion, such as a guide groove or guide rail structure. Since the support portion is arranged along the optical axis, it is convenient to guide the movable portion 20 to move along the optical axis. It is understood that the inner side of the guide groove or guide rail is provided with a metal insert to help reduce wear of the support portion when it moves within the guide groove or guide rail, reduce the risk of the support portion getting stuck during use, and further improve the quality and life of the camera module.

[0082] In some embodiments, the first support portion 61 can be implemented as a plurality of support portions arranged in sequence 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 portion 20, making the movable portion 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 state or a sliding state. Increasing the number of support portions can compensate for the motion states between the support portions. Furthermore, the second support portion 62 can be implemented as a plurality of support portions arranged in sequence along the optical axis, so that the opposite sides of the movable portion 20 are supported in a balanced manner. Specifically, the number of support portions included in the first support portion 61 is greater than or equal to 3, and the number of support portions included in the second support portion 62 is greater than or equal to 3.

[0083] Specifically, because the movable portion 20 moves along the optical axis, a first support portion 61 and a second support portion 62 are provided between the movable portion 20 and the fixed portion 10 to support the movable portion 20 against its own gravity. To further maintain the stability of the optical lens 100, the first support portion 61 and the second support portion 62 are positioned as close to each other as possible along the first direction relative to the optical axis on either side of the bottom of the movable portion 20, thereby providing as symmetrical support as possible for the movable portion 20 and reducing the risk of the movable portion 20 tilting.

[0084] It is understandable that since the second movable sidewall 23 is not equipped with components such as the piezoelectric actuator 30, the length of the second movable sidewall 23 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 shorter 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 and size of the movable portion 20. The piezoelectric actuator 30 and pre-pressed member 40 are arranged on the top of the first movable sidewall 21. On the one hand, this improves the utilization of the internal space of the camera module. This is because the piezoelectric actuator 30 and pre-pressed member 40 both extend along the optical axis, and the corresponding first movable sidewall 21 of the movable portion 20 also needs to extend along the optical axis. In other words, the first movable sidewall 21 needs to have a certain length to increase the driving stroke of the piezoelectric actuator 30. Furthermore, by arranging the first support portion 61 on the bottom surface of the first movable sidewall 21, there is more space for the first support portion 61, providing a larger support area. In contrast, since the piezoelectric actuator 30 is not required on one side of the second movable sidewall 23, a shorter length can be provided to provide sufficient space for the second support portion 62. This, on the one hand, not only enhances the structural compactness of the lens drive device, but also helps reduce the size of the lens drive device. On the other hand, since the optical focus stroke in the periscope camera module is relatively long, this design also helps the first support portion 61 and the second support portion 62 to consistently and stably support the movable portion 20 over long strokes. Since the optical focus stroke in the camera module is relatively long, this design helps ensure that the support portions consistently and effectively support the movable portion 20 over long strokes.

[0085] like Figure 24As shown, in a modified embodiment of the present application, a first support portion 61 and a second support portion 62 are respectively disposed on either side of the optical axis along the first direction. The first support portion 61 is disposed on the bottom surface of the first movable side wall 21 of the movable portion 20, and the second support portion 62 is disposed on the bottom surface of the second movable side wall 23 of the movable portion 20. The first support portion 61 has a greater number of support portions than 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. This provides the movable portion 20 with more support locations on the first support portion 61. It should be understood that the piezoelectric actuator 30 and the preload member 40 are located at the top of the first support portion 61. The greater number of support portions in the first support portion 61 allows the force acting on the first support portion 61 (at least including the preload generated by the preload member 40) to be dispersed across more support portions, thereby reducing the force acting on each support portion and lowering the risk of dents forming on the surfaces of the movable portion 20 and the fixed portion 10 contacting the first support portion 61. Accordingly, the length of the first movable side wall 21 along the optical axis is greater than the length of the second movable side wall 23 along the optical axis, thereby providing more space for the first support portion 61. The second movable side wall 23 is shorter along the optical axis, which can enhance the compactness of the drive device and reduce its size.

[0086] Specifically, the number of support parts of the first support part 61 is greater than or equal to 3, for example, 8, wherein the two support parts located at both ends along the optical axis direction have the largest height dimension along the second direction, that is, the height dimension of the other support parts along the second direction is less than or equal to the height dimension of the two support parts located at both ends of the first support part 61; the number of support parts of the second support part 62 is 1, and the height dimension of this one support part of the second support part 62 along the second direction is equal to the height dimension of the two support parts at both ends of the first support part 61.

[0087] More specifically, in this embodiment, the first support portion 61 is assembled within the first guide groove 211, and the second support portion 62 is assembled within the second guide groove 231. The large number of support portions of the first support portion 61 can reduce the risk of pitting 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.

[0088] It is worth noting that in this modified embodiment, the dimension of the pressing block 50 along the optical axis is larger than the dimension of the first supporting portion 61 along the optical axis, and along the optical axis, the projections of the first supporting portion 61 along the second direction are all located within the projection range of the pressing block 50 along the second direction. This can make the preload force applied to the multiple supporting portions of the first supporting portion 61 more uniform. Furthermore, the dimension of the pressing block 50 along the optical axis is also larger than the dimension of the first guide groove 211 along the optical axis, and along the optical axis, the projections of the first guide groove 211 along the second direction are all located within the projection range of the pressing block 50 along the second direction. In this way, even if the position of the first supporting portion 61 in the first guide groove 211 changes, along the optical axis, the projections of the first supporting portion 61 along the second direction can still be located within the projection range of the pressing block 50 along the second direction.

[0089] As previously mentioned, the pressing block 50 provides deformation space for the pre-pressed member 40, maintains the deformation of the pre-pressed member 40, and can also adjust the pre-pressure generated by the pre-pressed member 40. Because the first support portion 61, the pressing block 50, and the pre-pressed member 40 are located on the same side relative to the optical axis, the pre-pressure can be applied more directly to the first support portion 61, and the adjustment of the pre-pressure by the pressing block 50 can also directly affect the first support portion 61. The projections of the first support portion 61 along the second direction are all located within the projection range of the pressure block 50 along the second direction. On the one hand, the pre-pressing member 40 and the first support portion 61 are kept in close fit in space by the pressure block 50 to generate pre-pressure and supporting force. On the other hand, during the driving process, the first support portion 61 is always within the range of the pressure block 50, which reduces the risk of the movable portion 20 overturning and improves the stability of the driving device. On the other hand, the pre-pressure adjusted by the pressure block 50 can be dispersed by the multiple support portions of the first support portion 61, so that the force acting on a single support portion is more uniform. In particular, when a fall or impact occurs, the multiple support portions can disperse the impact force and reduce the risk of a dent in the first support portion 61. Furthermore, the pressure block 50 can also protect the first support portion 61 in its original position to prevent the first support portion 61 from detaching and affecting the reliability of the driving device.

[0090] It is worth mentioning that in this modified embodiment, the imaginary line of the direction of action of the pre-stressing force on the movable part 20 intersects with the line connecting the first support part 61, which is conducive to reducing the overturning moment value and further reducing the risk of the movable part 20 tilting. Specifically, the position where the friction head 32 of the piezoelectric actuator 30 acts on the first movable side wall 21 is aligned with the cross-sectional center of the first support part 61 in the second direction. This arrangement is conducive to the pre-stressing force applied by the pre-stressing part 40 to act stably and directly on the first support part 61, increasing the stability of the transmission of the pre-stressing force, thereby reducing the error phenomenon caused by poor alignment of components and improving the reliability of the camera module. Furthermore, this alignment method helps to reduce local excessive wear on the first support part 61, while extending the service life of the camera module, reducing the overturning moment value and further reducing the risk of the optical lens 100 tilting.

[0091] It is worth mentioning that, in this embodiment, the supporting portion can be implemented as a component suitable for rolling or sliding, such as a ball, a roller or a slider.

[0092] refer to Figure 2 、 Figure 16 and Figure 22 As shown, in some embodiments, the movable part 20 further includes a friction part 22, which is arranged on the first movable side wall 21 of the movable part 20 and faces the side where the friction head 32 is located, so that the friction head 32 of the piezoelectric actuator 30 is frictionally coupled to the friction part 22 through the pre-pressure of the pre-pressing part 40. It can be understood that the friction part 22 helps to increase the friction force between the movable part 20 and the friction head 32 of the piezoelectric actuator 30, further enhancing the driving force provided by the piezoelectric actuator 30.

[0093] In some embodiments, the friction portion 22 can be integrally formed with the first movable sidewall 21 of the movable portion 20, or the friction portion 22 and the movable portion 20 can be separate components, such that the friction portion 22 is attached to the first movable sidewall 21 of the movable portion 20 via an adhesive, thereby forming a separate structure from the movable portion 20. It is understood that the provision of the friction portion 22 helps to enhance the friction between the movable portion 20 and the friction head 32 of the piezoelectric actuator 30, thereby improving the driving performance of the camera module. Of course, the friction portion 22 can also be attached to the first movable sidewall 21 of the movable portion 20 by spraying, plating, etc.

[0094] refer to Figure 2 、 Figure 5 、 Figure 6 、 Figure 16 and Figure 22As shown, in some embodiments, at least a portion of the friction portion 22 and the bottom of the movable portion 20 maintain frictional contact with the piezoelectric actuator 30 and the first support portion 61, respectively. Under the action of the pressure block 50, the first support portion 61 provides an upward supporting force for the movable portion 20 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 portion 20 from tilting, a support portion is provided between the fixed portion 10 and the movable portion 20 to provide support and guidance for the movable portion 20 as it moves stably along the optical axis within the fixed portion 10, thereby enhancing the stability of the optical lens 100 during optical focusing and / or optical zooming of the camera module, thereby improving the imaging quality of the camera module.

[0095] It will be understood that in the present application, the piezoelectric actuator 30 is positioned above the friction portion 22 along the second direction and drives the movable portion 20 at the top of the movable portion 20. The pre-compression member 40 applies preload downward along the second direction to the top of the piezoelectric actuator 30, causing the friction head 32 to come into frictional contact with the friction portion 22 of the movable portion 20. The piezoelectric actuator 30 provides driving force for the movable portion 20, thereby driving the movable portion 20 to move along the optical axis. Furthermore, the first support portion 61, positioned between the fixed portion 10 and the movable portion 20, provides a supporting force upward along the second direction to the movable portion 20. This supporting force is in the opposite direction of the preload, which helps prevent surface contact between the movable portion 20 and the fixed portion 10, further causing high friction and hindering driving.

[0096] In some embodiments, as Figure 3 As shown, the pressing block 50 includes a pressing beam 51 and a pressing arm 52. The pressing arm 52 extends from both ends of the pressing beam 51 along the second direction toward the fixing portion 10, so that the pressing block 50 is fixed in the first accommodating groove 112 of the fixing portion 10. There is a groove 500 between the pressing beam 51 and the pressing arm 52. The groove 500 is suitable for providing a deformation space for the pre-pressed part 40. The lower pressure arm 52 includes a lower pressure mounting platform 522 and a lower pressure fixing platform 521. The lower pressure fixing platform 521 is located on the outside of the lower pressure mounting platform 522 along the optical axis direction. The length of the lower pressure fixing platform 521 along the second direction is greater than the length of the lower pressure mounting platform 522 along the second direction, so that the groove 500 is formed between the lower pressure mounting platform 522 and the lower pressure beam 51. The pre-pressing part 40 is installed on the lower pressure mounting platform 522, and the lower pressure fixing platform 521 is fixed to the fixing part 10, further simplifying the assembly process, enhancing the stability of the camera module, and improving the installation stability of the pre-pressing part 40, thereby enhancing the stability of the provided pre-pressure.

[0097] The groove 500, first receiving groove 112, and second receiving groove 113 of the pressing block 50 are connected. The pre-compression member 40 and at least a portion of the movable portion 20 are clamped between the pressing block 50 and the fixed portion 10, and at least a portion of the pre-compression member 40 and the movable portion 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 as the pressing block 50 is pressed downward further in the second direction, the pre-compression member 40 and at least a portion of the movable portion 20 are clamped more tightly, the deformation of the pre-compression member 40 is greater, and the pre-compression force generated by the pre-compression member 40 is greater. In other words, the pressing block 50 not only provides deformation space for the pre-compression member 40 and maintains its deformation, but also adjusts the amount of pre-compression force generated by the pre-compression member 40. For example, by moving the pressing beam 51 downward in the second direction toward the movable portion 20, the pressing block 50 is further pressed downward, thereby increasing the pre-compression force of the pre-compression member 40.

[0098] In some embodiments, the first fixed sidewall 11 of the fixed portion 10 further includes a base extension 114 and a second mounting surface 1141. The second receiving groove 113 is formed between the two base extensions 114. The top surfaces of the two base extensions 114 each form a second mounting surface 1141. The two downward pressing fixing platforms 521 of the pressure block 50 respectively abut the two second mounting surfaces 1141. It will be appreciated that the downward pressing arm 52 can be connected to the fixed portion 10, and the two downward pressing fixing platforms 521 of the downward pressing arm 52 and the two second mounting surfaces 1141 of the fixed portion 10 can abut against each other, further enhancing the stability and reliability of the pressure block 50. Because the downward pressing beam 51 and the downward pressing mounting platform 522 are located at different height planes, the formed groove 500 provides space for deformation of the pre-pressed member 40. Furthermore, by securing the pressure block 50 to the fixed portion 10, it can be adjusted during assembly, thereby reducing the risk of assembly inconsistencies.

[0099] In some embodiments, as Figure 3 、 Figure 6 、 Figure 20 、 Figure 21 and Figure 22 As shown, when the pre-pressed member 40 is subjected to the support force provided by the first support portion 61, it undergoes an upwardly convex bending deformation and generates a pre-load force in the second direction downwardly, thereby applying a pre-load force in the second direction downwardly to the movable portion 20. This causes the friction head 32 in the piezoelectric actuator 30 to frictionally engage with the movable portion 20, further providing a stable driving force. It can be understood that the relatively good flatness and consistency of the pre-pressed member 40 helps reduce the amount of variation in the pre-pressed member 40.

[0100] In some embodiments, the pre-pressing member 40 is a deformable elastic member, which provides a pre-pressure that can drive the movable part 20 and the piezoelectric actuator 30 to maintain frictional contact after deformation. Therefore, under the action of the pre-pressure, the friction head 32 in the piezoelectric actuator 30 contacts the friction part 22 of the movable part 20 and generates friction, thereby driving the movable part 20 to move. Specifically, in one example, Figure 5 As shown, the pre-pressed member 40 is a spring leaf with a bent structure. When subjected to the pressure block 50 and the first support portion 61, the bent spring leaf undergoes an upwardly convex bending deformation, generating a downward preload. It is understood that due to the tolerances inherent in the assembly of the pre-pressed member 40, the bent spring leaf is less susceptible to these tolerance fluctuations within a certain preload range, resulting in a more consistent preload provided by the bent spring leaf.

[0101] In some embodiments, as Figure 3 、 Figure 20 and Figure 21 As shown, the pre-compression member 40 includes a fixed end 41, an elastic portion 42, and a bent portion 43. There are two fixed ends 41 and two bent portions 43, each disposed between the two fixed ends 41 and the elastic portion 42, and connecting the elastic portion 42 and the two fixed ends 41. The two fixed ends 41 are fixed to the pressing block 50, and the elastic portion 42 abuts the piezoelectric active portion 31. It is understood that hollow structures may be provided in the elastic portion 42 and the bent portion 43 to further reduce the elastic coefficient, thereby helping to mitigate the effects of material tolerances, assembly tolerances, or other displacement fluctuations on the pre-compression force.

[0102] Furthermore, when the pre-pressing member 40 is configured as a spring, as Figure 5 As shown, the spring can be bent during manufacturing to impart a certain degree of deformation. During assembly, after the spring, piezoelectric actuator 30, and pressure block 50 are assembled, the spring's inherent deformation exerts a preload on the piezoelectric actuator 30 and movable portion 20. In other words, pre-deforming the spring prior to subsequent assembly and fixation creates a greater preload on the movable portion 20, improving the driving effect.

[0103] In some embodiments, as Figure 6 、 Figure 18 and Figure 22As shown, the pre-compression member 40 has a planar spring structure. It is understood that before the piezoelectric actuator 30 is actuated, deformation of the pre-compression member 40 is caused by the coordinated action of the pressure block 50 and the first support portion 61. The pre-compression 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 the piezoelectric active portion 31. When the pre-compression member 40 is acted upon by the pressure block 50 and the first support portion 61, the elastic portion 42 of the pre-compression member 40 bends upward, generating a downward preload. The presence of preload helps maintain frictional contact between the friction head 32 and the movable portion 20, generating a stable friction force. The piezoelectric actuator 30 further drives the movable portion 20 to move, enhancing the actuation effect. It should be understood that in this case, the middle portion of the pre-compression member 40 is higher than the ends, protruding away from the piezoelectric actuator 30. In other words, the elastic portion 42 of the pre-compression member 40 is higher than the fixed ends 41 at either end.

[0104] In some embodiments, as Figure 6 As shown, the deformation of the pre-pressed part 40 is related to the length of the lower pressing arm 52 of the pressing block 50 along the second direction. In other words, when the thickness of the first movable side wall 21 of the movable part 20 and the piezoelectric actuator 30 along the second direction is determined, when the length of the lower pressing arm 52 along the second direction is smaller, the pressing block 50 needs to move further downward in the second direction to connect the lower pressing arm 52 with the fixed part 10. At this time, the downward pressing beam 51 presses the first support part 61 with greater force, so that the first support part 61 provides greater support force to the pre-pressed part 40, thereby increasing the deformation of the pre-pressed part 40 and further generating a greater pre-pressure force. When the length of the lower pressing arm 52 along the second direction is larger, the degree of downward movement of the pressing block 50 in the second direction is smaller, resulting in a smaller deformation of the pre-pressed part 40 and further reducing the generated pre-pressure force. It is understandable that the set length value of the lower pressure arm 52 along the second direction cannot be too small, so as to avoid excessive support force and preload, further causing damage to the piezoelectric actuator 30, and may also cause the first support part 61 to be subjected to excessive preload and be over-extruded, thereby generating a pit. In other words, the set length value of the lower pressure arm 52 along the second direction cannot be too large, 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, and the preload provided to the movable part 20 is small, which cannot meet the demand of driving the movable part 20 to move. On the other hand, increasing the set length value 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.

[0105] In some embodiments, as Figure 3 、 Figure 21As shown, each downward-pressing mounting platform 522 of the pressing block 50 is provided with a first mounting surface 523 and mounting posts 524. The mounting posts 524 protrude from the first mounting surface 523 toward the fixed end 41 of the pre-pressed member 40, such that the fixed end 41 of the pre-pressed member 40 is fixed below the first mounting surface 523 via the mounting posts 524. The flat lower surface (first mounting surface 523) of the downward-pressing mounting platform 522 helps provide a flat mounting surface for the pre-pressed member 40, thereby preventing height inconsistencies between the left and right sides of the pre-pressed member 40, thereby preventing increased variation in the pre-pressed member 40 and inconsistent pre-compression forces on the movable portion 20.

[0106] It is understood that the mounting posts 524 provided on both sides of the downward pressure mounting platform 522 correspond to the fixing holes 411 provided on the fixed end 41 of the pre-pressed part 40. Therefore, during assembly, the mounting posts 524 can extend into the fixing holes 411, thereby fixing the pre-pressed part 40 to the downward pressure mounting platform 522. Specifically, the mounting posts 524 can be directly riveted to the fixing holes 411 during fixation, or adhesive can be applied to the surfaces of the fixed end 41 of the pre-pressed part 40 and the downward pressure mounting platform 522 for pre-fixation, and then the mounting posts 524 can be riveted to the fixing holes 411. This further enhances the stability of the pre-pressed part 40 and the pressing block 50 during installation and use, which helps maintain the stability of the provided pre-pressure.

[0107] In some embodiments, the pre-press 40 can be first installed on the pressure block 50, and then the pressure block 50 can be flipped over and the lower pressure arm 52 can be fixed to the first fixed side wall 11 of the fixed portion 10. This further optimizes the assembly process of the pre-press 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-press 40 are first assembled into a semi-finished product, and then the piezoelectric actuator 30 is carried by the pre-press 40 for the next assembly step. If the pre-press 40 is directly assembled on the fixed portion 10, it is necessary to ensure that the friction head 32 of the piezoelectric actuator 30 is aligned with the movable portion 20 at all times during the assembly process. Otherwise, the friction contact position between the friction head 32 and the movable portion 20 may shift after assembly, thereby affecting the driving effect. In addition, due to the characteristics of the pre-press 40, it is also difficult to adjust the pre-press 40 during the assembly process. Compared with the above method, the pre-pressed part 40 is first installed on the pressure block 50, and the lower pressure arm 52 is fixed to the fixed part 10 after the pressure block 50 is flipped over. During the assembly process of the pre-pressed part 40, there is no need to always keep the position of the friction head 32 and the movable part 20 aligned, and the assembly difficulty is reduced. Moreover, after the pre-pressed part 40 is pressed on the pressure block 50, the position and assembly between the pressure block 50 and the fixed part 10 can be adjusted to achieve the adjustment of the pre-pressed part 40, and the adjustability is higher.

[0108] like Figure 8As shown, in some embodiments, two first guide grooves 211 are opened on the bottom surface of the first movable side wall 21 at intervals along the optical axis direction, and two second guide grooves 231 are opened on the bottom surface of the second movable side wall 23 at intervals along the optical axis direction, and the distance between the farthest end points of the two first guide grooves 211 is greater than the distance between the farthest end points of the two second guide grooves 231.

[0109] Due to the preload, the friction head 32 drives the friction portion 22 on the first movable sidewall 21. This increases the length of the first movable sidewall 21 of the movable portion 20 along the optical axis, thereby increasing the length of the friction portion 22 along the optical axis. Furthermore, the piezoelectric actuator 30 and the first support portion 61 are both located on the first movable sidewall 21. Since both the piezoelectric actuator 30 and the preload 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, leaving more space on the bottom side of the first movable sidewall 21 for the first support portion 61. To further improve the balance of the structure, the distance between the first support portions 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, or other shapes.

[0110] In some embodiments, two first guide grooves 211 are opened on the bottom surface of the first movable side wall 21 at intervals along the optical axis direction, and the first support portion 61 is installed in the first guide groove 211 and the first guide rail 111. Two second guide grooves 231 are opened on the bottom surface of the second movable side wall 23 along the optical axis direction, which are suitable for the second support portion 62 to be installed in the second guide groove 231 and the second guide rail 131, which is beneficial to improving the installation stability of the support portion and optimizing the assembly process.

[0111] Furthermore, since the support portion 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 portions of the first support portion 61 assembled in the two first guide grooves 211 also increases, thereby making the support area formed by the line connecting the first support portion 61 and the second support portion 62 larger, thereby reducing the risk of the movable portion 20 tilting during movement.

[0112] In some embodiments, as Figure 6As shown, along the second direction, the projection of the friction portion 22 overlaps with the line connecting the projections of the two distal end points of the first guide grooves 211. This overlaps with the line connecting the projections of the two support portions of the first support portion 61, which helps mitigate the risk of the movable portion 20 tipping over in the left-right and front-to-back directions. Therefore, increasing the spacing between the two support portions of the first support portion 61 provides a larger support area for the movable portion 20 and provides a stable support force throughout the entire travel range of the movable portion 20, reducing the possibility of the movable portion 20 tipping over in the front-to-back direction. In other words, the length of the friction portion 22 along the optical axis is less than the distance between the distal end points of the two first guide grooves 211 along the optical axis.

[0113] In some embodiments, the first support portion 61 and the second support portion 62 each include two balls for providing a stable support force for the movable portion 20. Furthermore, each ball is disposed in a single guide groove to avoid interference between the two balls. It is understandable that the greater the distance between the two balls spaced apart along the optical axis of the first support portion 61 and the second support portion 62, the more stable the support 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 provided in the first support portion 61 is greater than the distance between the two balls provided in the second support portion 62, the support surface area formed by the ball group is increased, thereby increasing the stability of the optical lens 100.

[0114] 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 overturning of the movable portion 20.

[0115] In some embodiments, the piezoelectric actuator 30 includes two friction heads 32, which are spaced apart along the optical axis on the piezoelectric active portion 31. The distance between the two friction heads 32 of the piezoelectric actuator 30 is smaller than the distance between the two support portions of the first support portion 61. This helps reduce preload deviation and evenly distributes the preload on the two support portions of the first support portion 61, thereby reducing wear and damage to the first support portion 61 caused by uneven preload. Furthermore, when the piezoelectric active portion 31 vibrates and deforms, causing the friction heads 32 to move, the angle of contact between the friction heads 32 and the movable portion 20 changes with the movement. This causes the force generated between the friction heads 32 and the movable portion 20 to not always be parallel to the optical axis. Instead, the direction of the force may have a certain inclination angle relative to the plane of the first movable sidewall 21 of the movable portion 20. This inclination may further cause the movable portion 20 to tilt. Therefore, a larger distance between the two support portions of the first support portion 61 can provide a larger support area for the movable portion 20 , thereby reducing the overturning moment value and further reducing the risk of the movable portion 20 tilting.

[0116] In some embodiments, an imaginary line of the direction of the preload applied to the movable portion 20 intersects with a line connecting the first support portions 61 , which helps reduce the overturning moment value and further reduces the risk of the movable portion 20 tilting.

[0117] In some embodiments, the position at which the friction head 32 of the piezoelectric actuator 30 acts on the first movable sidewall 21 is aligned with the cross-sectional center of the first support portion 61 in the second direction. This arrangement facilitates the stable and direct application of the preload force applied by the preload member 40 to the first support portion 61, increasing the stability of the preload force transmission, thereby reducing errors caused by poor component alignment and improving the reliability of the camera module. Furthermore, this alignment helps reduce localized excessive wear on the first support portion 61, extending the service life of the camera module while reducing the overturning moment value and further reducing the risk of tilting the optical lens 100.

[0118] like Figure 24 In the illustrated variant embodiment, the first movable sidewall 21 is provided with one first guide groove 211, and the second movable sidewall 23 is provided with 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 will be appreciated that the greater length of the first guide groove 211 along the optical axis can increase the number of supporting 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, thereby reducing the risk of tilting of the movable portion 20 during movement.

[0119] Furthermore, in this modified embodiment, if Figure 22 As shown, when viewed along the second direction, the projection of the friction head 32 of the piezoelectric actuator 30 falls entirely on the first guide groove 211 along the optical axis. Furthermore, when viewed along the second direction, the projection of the friction head 32 of the piezoelectric actuator 30 falls entirely on the first support portion 61 along the optical axis. This reduces the risk of the movable portion 20 tipping over and helps 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 includes two friction heads 32, which are spaced apart on the piezoelectric active portion 31 along the optical axis. The spacing between the two friction heads 32 can be greater than the dimension of any of the first support portions 61 along the optical axis. When viewed along the second direction, the projections of the two friction heads 32 fall entirely on the first support portion 61 along the optical axis. Therefore, in some cases, when viewed along the second direction, the projections of all the friction heads 32 of the piezoelectric actuator 30 fall entirely on the first support portion 61 along the optical axis.

[0120] Accordingly, in this modified embodiment, when viewed along the second direction, the projection of the friction portion 22 overlaps with the projection of the first guide groove 211, so that during the movement of the movable portion 20, the projection of the friction head 32 can fall on the first support portion 61. More specifically, the length of the friction portion 22 along the optical axis is shorter than the length of the first guide groove 211 along the optical axis.

[0121] In some embodiments, reference Figure 8 、 Figure 9 and Figure 24 As shown, the first support portion 61 and the second support portion 62 are components that can be independently formed relative to the movable portion 20 and the pressing block 50. Furthermore, the first support portion 61 can be a multi-point structure spaced apart along the optical axis, such as a ball or a slider. The second support portion 62 can be a multi-point structure or a guide rail structure spaced apart along the optical axis, such as a ball, a slider or a guide rod. When a guide rod is used as a support component, the better linearity can increase the stability and reliability of the movable portion 20 when being driven to move, further reducing the tilt or overturning phenomenon of the optical lens 100. Specifically, the second guide groove 231 equipped with the second support portion 62 can be trapezoidal, rectangular, V-shaped, etc.

[0122] It is understood that when balls are used as the support structure for the first support portion 61 and guide rods are used as the support structure for the second support portion 62, the downward pressure in the second direction applied to the second support portion 62 is primarily the magnetic attraction provided by the magnetic assembly 70, which is less than the preload applied to the first support portion 61. The pressure applied to the first support portion 61 includes both the magnetic attraction provided by the magnetic assembly 70 and the preload provided by the preload member 40. This reduces the friction generated by the surface contact of the second support portion 62, thereby reducing the power consumption of the piezoelectric actuator 30. On the other hand, if guide rods are used as the support structure for the first support portion 61, the greater pressure applied to the guide rod structure, which has a higher coefficient of friction, will affect the driving effect of the piezoelectric actuator 30. It is understood that when balls are used as the support structure, the balls use point contact with the guide rails and guide grooves, resulting in minimal rolling friction and greater sliding friction, which facilitates the driving of the movable portion 20.

[0123] 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 can be bosses, using point contact friction, which is beneficial to reduce wear on the guide groove or guide rail structure and extend the service life of the camera module.

[0124] In some embodiments, as Figure 9 、 Figure 10 and Figure 23 As shown, the driving device further includes a magnetic attraction component 70, which includes a first magnetic attraction component 71 and a second magnetic attraction component 72. The first magnetic attraction component 71 is arranged on the main body of the fixed part 10, and the second magnetic attraction component 72 is arranged on the bottom of the movable part 20. The first magnetic attraction component 71 and the second magnetic attraction component 72 are arranged relative to each other along the second direction and interact with each other to generate a magnetic attraction force, which causes the movable part 20 and the fixed part 10 to clamp the first support part 61 and the second support part 62. Figure 9 and Figure 10 , along the first direction, the distance between the second magnetic member 72 and the second support portion 62 is smaller than the distance between the second magnetic member 72 and 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 provided on the second movable side wall 23 of the movable portion 20, and the first magnetic member 71 is provided on the second fixed side wall 13 of 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 magnetic attraction force through interaction. Wherein, referring to Figure 23As shown, along the first direction, the distance from the second magnetic member 72 to the second support portion 62 is greater 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 pre-pressure are the same. Specifically, the second magnetic member 72 is provided on the first movable side wall 21 in the movable portion 20, and the first magnetic member 71 is provided on the first fixed side wall 11 in the fixed portion 10. The first magnetic member 71 and the second magnetic member 72 are arranged relative to 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 pre-pressure, the pre-pressure and the magnetic attraction force are superimposed on each other, and when the magnetic attraction force is not sufficient to resist the external force, the pre-pressure can provide additional support. Furthermore, since the magnetic attraction component 70 is provided at the bottom of the movable portion 20 and the piezoelectric actuator 30 is provided at the top of the movable portion 20, it is only necessary to provide a support portion at the bottom of the movable portion 20 to support the movable portion 20, further reducing the position where the support portion needs to be provided in the camera module.

[0125] It is understandable that since the magnetic attraction component 70 is provided at the bottom of the movable portion 20 and the first movable side wall 21 is subjected to pre-pressure, the movable portion 20 has a tendency to overturn, and therefore a magnetic attraction force needs to be provided to reduce the risk of the movable portion 20 producing an overturning movement. The magnetic attraction force is in the same direction as the pre-pressure force. Along the first direction, the point of action of the magnetic attraction force on the movable portion 20 and the point of action of the pre-pressure force on the movable portion 20 are respectively located on either side of the optical axis. On the one hand, this helps to make the movable portion 20 close to the fixed portion 10 and enhance the stability of the camera module. On the other hand, the magnetic attraction force and the pre-pressure force cooperate with each other to further balance the force on the movable portion 20, which helps to reduce the tilt of the optical lens 100 caused by unbalanced torque.

[0126] In some embodiments, Figure 9 and Figure 10 The second magnetic member 72 is disposed in the middle area between the two second guide grooves 231 along the optical axis direction to reduce the overturning moment value and further reduce the risk of the movable portion 20 tilting.

[0127] In some embodiments, as Figure 10 As shown, the first magnetic member 71 is a metal yoke and includes a base portion 711 and a support portion 712. The projection of at least a portion of the base portion 711 along the second direction overlaps with the projection of the second magnetic member 72 along the second direction, and the projection of at least a portion of the support portion 712 along the second direction overlaps with the projection of the second support portion 62 along the second direction. The provision of the first magnetic member 71 enhances the magnetic attraction, better balances the preload, and reduces the risk of the movable portion 20 tipping over. Furthermore, the magnetic attraction stabilizes the support portion between the movable portion 20 and the fixed portion 10, enhancing its stability and contributing to improved imaging quality of the camera module.

[0128] In some embodiments, the first magnetic member 71 includes a base portion 711 and a support portion 712 that are integrally connected, improving processing convenience and increasing processing efficiency. Furthermore, the base portion 711 and the support portion 712 can be separate structures, which helps to improve the flatness of the base portion 711. However, when the area of ​​the base portion 711 is too large, deformation is likely to occur.

[0129] In some embodiments, the support portion 712 can be set to a V-shape or a flat shape 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 to avoid pits in the first support portion 61 and the second support portion 62, thereby further improving the quality and service life of the camera module.

[0130] In some embodiments, the piezoelectric actuator 30 further includes a conductive member 33 disposed between the piezoelectric active portion 31 and the pre-pressing member 40. Figure 3 、 Figure 20 and Figure 21 As shown, the conductive member 33 includes a first connecting portion 331, a second connecting portion 333 and a conductive portion 334. 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 of the piezoelectric actuator 30 and the pre-compression member 40. 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. Figure 20 and Figure 21 In the illustrated embodiment, the first connecting portion 331 is a horizontal plate disposed along the second direction between the piezoelectric active portion 31 of the piezoelectric actuator 30 and the pre-compression member 40. The first connecting portion 331 may have a through hole to reduce the impact 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 from the second connecting portion 333 along the outer circumferential wall of the fixed portion 10 in the second direction and is connected to the conductive member 14 provided on the fixed 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 to the ends of the first connecting portion 331 along the optical axis and integrally bent in the second direction. The other ends of the first sub-connecting portion 3331 and the second sub-connecting portion 3332 are then connected to the conductive portion 334 in the second direction. The conductive member 33 can increase the space utilization inside the camera module and achieve electrical conduction.

[0131] Furthermore, the conductive member 33 further includes two shaping members 335 fixed to the outside of the bends of the first sub-connection portion 3331 and the second sub-connection portion 3332, respectively. The shaping members 335 are used to maintain the bends of the first sub-connection portion 3331 and the second sub-connection portion 3332. The shaping members 335 can be made of materials such as plastic or metal.

[0132] In some embodiments, the friction head 32 in the piezoelectric actuator 30 can directly contact the first movable side wall 21 of the movable part 20 without the friction part 22, thereby reducing the weight of the movable part 20 and further reducing the resistance required to drive the movable part 20.

[0133] refer to Figure 1 、 Figure 4 、 Figure 15 and Figure 16 As shown, in some embodiments, in addition to the flexible circuit board, the circuit assembly in the camera module also includes a conductive member 14 arranged around the outer peripheral wall of the fixed part 10. Specifically, the conductive member 14 is embedded in or externally placed on the first fixed side wall 11 and the second fixed side wall 13, and at least part of the conductive member 14 is exposed on the outer peripheral side of the fixed part 10. The conductive member 14 is provided with a conductive portion 141. The conductive member 14 is welded to the conductive portion 334 through the conductive portion 141 and electrically conductive. And the conductive member 14 is used to achieve the conduction of the circuit part of the photosensitive component 80, the light turning element 90 and other circuit modules in a simple electrical connection. Among them, as Figure 2 and Figure 15 The conductive member 14 with a bent structure shown is easy to connect and adapts to complex spatial layout and shape requirements, further enabling efficient wiring design in a small or irregular space, thereby improving space utilization.

[0134] Furthermore, one of the first magnetic member 71 and the second magnetic member 72 is a magnet, and the other is a magnet or a yoke suitable for adsorption with the magnet, and the magnet or the yoke can be fixed by adhesion, insert injection molding, riveting, etc. Since the first movable side wall 21 and the second movable side wall 23 of the movable part 20 are respectively subjected to pre-pressure and magnetic attraction, and the direction of the magnetic attraction is the same as the direction of the pre-pressure, it helps to reduce the risk of the movable part 20 tilting. Specifically, the pre-pressure can be greater than the magnetic attraction, because when the magnetic attraction is too large, the friction resistance that the movable part 20 needs to overcome when it is driven to move 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.

[0135] In some embodiments, the first magnetic attraction member 71 is a magnet, and the second magnetic attraction member 72 is an insert-molded yoke, and the yoke can also be used as a conductive member 14 to simplify the structure. Specifically, the yoke is designed with a metal strip and is sheared and formed after manufacturing. This batch manufacturing method can further improve production efficiency. Furthermore, the yoke used in this application has a large planar area, and increasing the metal pressing area during the manufacturing process can increase the planar regularity. Furthermore, the yoke can be made of a material that is mutually attracted to the magnet, such as a metal material, to further enhance the magnetic attraction, thereby improving the stability of the optical lens 100.

[0136] In some embodiments, the magnetic assembly 70 further includes a first magnetic member 71 and a second magnetic member 72. The first magnetic member 71 located on the movable portion 20 and the second magnetic member 72 provided on the fixed portion 10 interact with each other to generate a magnetic force. Therefore, when the movable portion 20 is driven along the optical axis, the magnetic force generated by the magnetic assembly 70 can ensure that the movable portion 20 is always supported by the support portion during the long-stroke movement of the movable portion 20, and the movable portion 20 will not tilt to a large extent. In addition, the magnetic force generated by the magnetic assembly 70 located on the second movable side wall 23 is consistent with the direction of the pre-stressing force generated by the pre-stressing member 40 on the first movable side wall 21, which is conducive to improving the fit between the movable portion 20 and the fixed portion 10, further reducing the tilting of the movable portion 20 due to torque imbalance, and further reducing the risk of tilting of the optical lens 100.

[0137] In some embodiments, as Figure 2 、 Figure 3 、 Figure 16 、 Figure 20 、 Figure 21 and Figure 22 As can be seen from the foregoing, the piezoelectric actuator 30 includes a piezoelectric active portion 31, a friction head 32, and a conductive member 33. The piezoelectric actuator 30 abuts against the movable portion 20 under the action of preload. Specifically, the friction head 32 is provided on the side of the piezoelectric active portion 31 facing the first movable sidewall 21. The piezoelectric active portion 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 portion 31, resonance occurs and ultrasonic waves are generated. Therefore, yaw reciprocating motion or elliptical motion can be achieved on the specifically configured electrode layer, thereby driving the friction head 32 to perform yaw reciprocating motion or elliptical motion. Furthermore, through friction between the friction head 32 and the first movable sidewall 21, the movable portion 20 is driven to slide relative to the fixed portion 10.

[0138] refer to Figure 2 、 Figure 3 、 Figure 16 、 Figure 20 and Figure 21As can be seen, in some embodiments, the piezoelectric actuator 30 further includes a buffer member 34 disposed between the pre-compression member 40 and the piezoelectric active portion 31. Because the buffer member 34 has a lower elastic modulus than the pre-compression member 40, it is more susceptible to deformation. This allows it to adaptively produce varying degrees of contraction deformation based on the varying tolerances of the piezoelectric actuators 30, thereby minimizing differences in the pre-compression forces between piezoelectric actuators 30 with varying tolerances. In other words, the deformable buffer member 34 can offset at least some of the pre-compression force variations caused by material and assembly tolerances, and can also absorb some of the deformation of the piezoelectric active portion 31. The buffer member 34 can also absorb some of the vibrational deformation of the piezoelectric active portion 31, thereby maintaining its parallelism relative to the first movable sidewall 21 and further protecting the piezoelectric actuator 30 from excessive mechanical stress. It is worth noting that in one specific embodiment, the buffer member 34 is disposed between the elastic portion 42 of the pre-compression member 40 and the piezoelectric active portion 31.

[0139] It is understood that the buffer 34 can be a tape, with one surface flatly bonded to the pre-press 40 and the opposite surface bonded to the piezoelectric active part 31 or a component below the piezoelectric active part 31. Furthermore, the tape is easy to install and use, requires no curing, and has 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 smaller than, equal to, or larger than the size of the piezoelectric active part 31, so that the buffer 34 fills the space between the piezoelectric active part 31 and the pre-press 40. Similarly, the present application does not impose any restrictions on the specific shape or number of the buffer 34. For example, two pieces of tape can be stacked together to form the buffer 34, or two pieces of tape can be spaced apart along the second direction. Furthermore, the size of the buffer 34 is preferably larger than the size of the piezoelectric active part 31, so that the area between the piezoelectric active part 31 and the pre-press 40 is completely filled by the buffer 34, which helps ensure the structural strength of the pre-press 40 connection and enhances the parallelism provided to the piezoelectric active part 31.

[0140] Specifically, the buffer member 34 can also be a low-modulus adhesive applied to the surface of the piezoelectric active part 31. That is, because the buffer member 34 can be attached between the pre-press 40 and the conductive member 33, it not only facilitates assembly but also avoids the problem of affecting the vibration mode of the piezoelectric active part 31 after bonding the pre-press 40 with adhesives such as UV glue or thermosetting glue.

[0141] Furthermore, if Figure 16 、 Figure 20 and Figure 21As shown, the pre-compression member 40 further includes an intermediate connector 44 disposed between the elastic portion 42 and the buffer member 34. The intermediate connector 44 is secured to the elastic portion 42, thereby securing the elastic portion 42 to the buffer member 34 via the intermediate connector 44. The provision of the intermediate connector 44 facilitates securing the pre-compression member 40 to the piezoelectric actuator 30 and provides a flat mounting surface for the piezoelectric actuator 30. Furthermore, by adjusting the thickness of the intermediate connector 44 in the second direction, the height of the elastic portion 42 in the second direction, and thus the magnitude of the pre-compression force applied by the pre-compression member 40, can be adjusted. Specifically, the intermediate connector 44 can be first secured to the elastic portion 42 and then secured to the piezoelectric actuator 30. Alternatively, the intermediate connector 44 can be first secured to the piezoelectric actuator 30 via the buffer member 34 and then secured to the elastic portion 42. Of course, the method of fixing the pre-pressed part 40 and the piezoelectric actuator 30 first can improve the convenience of fixing the pre-pressed part 40 and the piezoelectric actuator 30, and also form a flat mounting surface for the pre-pressed part 40. Here, the intermediate connecting part 44 and the elastic part 42 can be fixed by glue bonding, insert injection molding, riveting, etc. For example, Figure 16 and Figure 22 In the illustrated variant embodiment, the intermediate connector 44 has two connecting posts 441 protruding toward the elastic portion 42, and the elastic portion 42 forms two corresponding connecting holes 421. Thus, the two connecting posts 441 pass through the two connecting holes 421 and are then secured by riveting. The use of connecting posts 441 and connecting holes 421 not only facilitates positioning, but also allows the connecting posts 441 to protrude beyond the elastic portion 42 through the connecting holes 421, thereby protecting the elastic portion 42 and preventing direct impact between the elastic portion 42 and the pressure block 50.

[0142] like Figure 2 、 Figure 3 、 Figure 16 and Figure 20 As shown, in some embodiments, the piezoelectric active part 31 is a substrate that utilizes the inverse piezoelectric effect, which contracts or expands according to changes in the polarization direction and the direction of the electric field. This effect means that when an electric field is applied in the polarization direction of the dielectric, the dielectric will produce mechanical deformation, thereby enabling the piezoelectric active part 31 to achieve polarization by applying an electric field in materials such as single crystal, polycrystalline ceramics, polymers, etc., thereby generating ultrasonic oscillations. This oscillation can produce a pendulum reciprocating motion or elliptical motion on a specifically set electrode layer, thereby driving the friction head 32 to perform corresponding movement. It can be understood that the friction 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 friction force between the friction head 32 and the movable part 20.

[0143] In one specific embodiment of the present application, the piezoelectric active portion 31 employs a multi-layer stacked structure. Specifically, the piezoelectric active portion 31 is formed by alternating ceramic layers and electrode layers stacked 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 layers undergo deformation, either elongating or contracting. By providing multiple electrode layers, the voltage required to drive the piezoelectric active portion 31 to perform bending vibration can be reduced. The number of electrode and ceramic layers provided can be selected based on 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 typically made of a material exhibiting a piezoelectric effect, such as PZT piezoelectric ceramics, while the electrode layers are made of a conductive material, such as copper, gold, silver, or a silver alloy. The multi-layer ceramic layers and the multi-layer electrode layers can be fixed together through a ceramic co-firing process, whereby a layer of ceramic slurry is laid, followed by a layer of electrode slurry, and then they are heated and sintered together to form the stacked piezoelectric active portion 31. Furthermore, by supplying power to the multi-layer electrode layers, the multi-layer ceramic layers disposed between the multi-layer electrode layers can be polarized.

[0144] It can be understood that the side electrical connections in the camera module are connected to the positive voltage and negative voltage of the power supply, respectively, thereby providing at least one electrode layer with a positive voltage and at least one electrode layer with a negative voltage, respectively, thereby polarizing the multi-layer ceramic layers, and the polarized piezoelectric ceramics will automatically arrange into a piezoelectric direction, further generating a piezoelectric effect.

[0145] In some embodiments, to improve the driving performance of the piezoelectric actuator 30, the piezoelectric active portion 31 may be made of a piezoelectric ceramic material or a piezoelectric single crystal material. The piezoelectric active portion 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, for example, 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.

[0146] In some embodiments, the piezoelectric active portion 31 is rectangular in shape along the optical axis. A friction head 32 protrudes from the piezoelectric active portion 31 on the side facing the movable portion 20 along the second direction. Specifically, two friction heads 32 are provided, spaced apart along the optical axis. It is understood that the piezoelectric actuator 30 drives the movable portion 20 to move along the optical axis. Compared to a single protruding friction head 32 driving the movable portion 20, the presence of two friction heads 32, working together, achieves a better effect in driving the movable portion 20 to perform long-stroke motion.

[0147] In some embodiments, the friction head 32 is made of a wear-resistant material. For example, various high-hardness wear-resistant ceramic materials such as aluminum oxide, zirconium oxide, and silicon carbide ceramics, or highly wear-resistant metal materials, carbon fiber materials, or composite materials of ceramics, metal particles, and polymers can be used. While improving the wear resistance of the friction head 32, it also helps to increase the friction between the movable portion 20 and the friction head 32, further enhancing the driving force provided by the piezoelectric actuator 30. Furthermore, due to its good wear resistance, it helps to extend the service life of the friction head 32. Furthermore, in some embodiments, the friction head 32 and the piezoelectric active portion 31 can be an integral structure or a detachable structure. The friction head 32 and the piezoelectric active portion 31 can be fixed to the piezoelectric active portion 31 by bonding, snapping, nesting, welding, or fastener connection, ensuring that the connection strength is guaranteed through surface contact between the two, and at the same time, the friction head 32 can produce significant movement as the piezoelectric active portion 31 deforms.

[0148] In some embodiments, the piezoelectric active part 31 performs bending vibration along the second direction in a mode of one crest and one trough. Since the position of the friction head 32 can be coordinated with the mode of the piezoelectric active part 31, the friction head 32 can be set at the position of the crest and trough at the corresponding position. It can be understood that the shape of the friction head 32 can be a sphere, a hemisphere, a cuboid, a table, a cylinder, a semi-cylinder, etc. The number of friction heads 32 can be one or two or more. In the present application, there are no specific restrictions on the shape and number of the friction head 32, the shape of the piezoelectric active part 31, the electrode setting method, and the connection method between the friction head 32 and the piezoelectric active part 31.

[0149] Furthermore, the driving device further includes an upper cover 120 , which is fixed above the fixing portion 10 and forms a receiving cavity to accommodate other components of the driving device.

[0150] In some embodiments of the present application, Figure 1As shown, the camera module further includes an optical system. Since the fixing part 10 is a frame, the optical system is assembled inside the fixing part 10. The optical system includes a light deflecting element 90, an optical lens 100 and a photosensitive component 80, which are sequentially distributed along the optical axis direction, wherein the optical lens 100 is arranged on the light deflecting path of the light deflecting element 90, and the photosensitive component 80 is used to receive the light transmitted from the optical lens 100 and perform imaging. Specifically, the light emitting direction of the light deflecting 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 direction. The light deflecting element 90 is located on the side of the fixing part 10 close to the incident side of the light, the optical lens 100 is located in the central area of ​​the fixing part 10, and the photosensitive component 80 is located on the side of the fixing part 10 away from the incident side of the light. The camera module provided by the present application has the characteristics of easy assembly and good pre-pressure consistency within the camera module.

[0151] In some embodiments of the present 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. At least one optical lens is distributed along the optical axis within the lens mounting hole, thereby achieving the light converging effect of the optical lens 100. After receiving the converged light, the photosensitive component 80 converts the received optical signal into an electrical signal for imaging processing.

[0152] In some embodiments, the number of optical lenses 100 can be two, wherein one of the two optical lenses 100 can be fixed, and the other optical lens 100 can be driven and moved along the optical axis to achieve optical focus 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 focus and optical zoom functions. Further, the number of optical lenses 100 can be three, wherein two of the three optical lenses 100 can be fixed, and the other optical lens 100 can be driven to move along the optical axis to achieve optical focus and optical zoom functions. Of course, in this example, one of the three optical lenses 100 can be fixed, and the other two optical lenses 100 can be driven to move along the optical axis to achieve optical focus and optical zoom functions. In other specific examples of the present application, the number of optical lenses 100 can also be four, five, etc., and is not limited to the present application.

[0153] 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 on and connected to the chip circuit board. The filter element holder is positioned around the photosensitive chip and is also disposed on the chip circuit board. The filter element holder and the chip circuit board may be integrally formed or separated. The filter element is mounted on the filter element holder to maintain the photosensitive path of the photosensitive chip and filter the imaging light entering the photosensitive chip.

[0154] This application can also provide a camera module, such as Figure 1 As shown, it includes: The drive device as above; A light deflection element 90 for deflecting incident light, The optical lens 100 is held on the light deflection path of the light deflection element 90; The photosensitive component 80 is used to receive light from the optical lens 100.

[0155] This application can also provide a method for assembling a camera module, such as Figures 11 to 14 As shown, it includes the steps of: S1. Provide a fixing portion 10; S2. Provide a movable portion 20 and install the movable portion 20 in the fixed portion 10. The movable portion 20 is used to support the optical lens 100. The optical lens 100 defines an optical axis. S3. Providing a piezoelectric actuator 30, a pre-pressed member 40, and a pressing block 50; assembling the piezoelectric actuator 30, the pre-pressed member 40, and the pressing block 50 to form a pre-pressed drive assembly, wherein the pre-pressed member 40 is disposed between the piezoelectric actuator 30 and the pressing block 50; the piezoelectric actuator 30 is mounted on the pre-pressed member 40; and the pressing block 50 is coupled to the pre-pressed member 40 and provides a preset deformable space for the pre-pressed member 40; S4. Install the preload drive assembly on the fixed part 10 in a direction perpendicular to the optical axis and place the drive assembly on top of the movable part 20, wherein the pressure block 50 is fixed to the fixed part 10, and the preload member 40 applies a preload perpendicular to the optical axis direction (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 preload, and the piezoelectric actuator 30 and the movable part 20 are in frictional contact.

[0156] By placing the piezoelectric actuator 30 on top of the movable portion 20, the support structure can be located solely at the bottom of the movable portion 20 for support. This eliminates the need for additional support structures on the top or sides of the movable portion 20, reducing the number of support structures required and enhancing assembly consistency and precision. Furthermore, since the assembly process proceeds layer by layer from bottom to top, the assembly process is simplified and tolerances are reduced.

[0157] In some embodiments, a camera module assembly method, step S1 further includes the following steps: S11 , providing a fixing portion 10 and a first magnetic member 71 , wherein the first magnetic member 71 is disposed on the fixing portion 10 .

[0158] In some embodiments, a camera module assembly method, step S2 further includes the following steps: S21, providing a second magnetic member 72, the second magnetic member 72 being disposed on the movable portion 20; S22. Provide a first support part 61 and a second support part 62, assemble the first support part 61 on the first guide rail 111, and assemble the second support part 62 on the second guide rail 131. The second magnetic part 72 and the first magnetic part 71 are arranged relative to each other along the second direction and interact with each other to generate a magnetic force, which enables the movable part 20 and the fixed part 10 to clamp the first support part 61 and the second support part 62.

[0159] In some embodiments, a camera module assembly method, step S3 further includes the following steps: S31, first fix the pre-pressing member 40 and the piezoelectric actuator 30, and then couple the pre-pressing member 40 to the pressing block 50 to form a pre-pressing drive assembly. In this way, the pre-pressing member 40 can be assembled with the piezoelectric actuator 30 and the pressing block 50 together, reducing the assembly difficulty.

[0160] Specifically, in step S31, the pre-pressed piece 40 includes two fixed ends 41, an elastic portion 42 and two bent portions 43. The two bent portions 43 are respectively arranged between the two fixed ends 41 and the elastic portion 42 and respectively connect the elastic portion 42 and the two fixed ends 41. The pre-pressed piece 40 is fixed to the pressing block 50 through the two fixed ends 41, and the piezoelectric actuator 30 is installed on the pre-pressed piece 40 by being fixed to the elastic portion 42.

[0161] It is worth mentioning that in other embodiments of the present application, the pre-pressed member 40 and the pressing block 50 may also be fixed first in step S3. Specifically, step S3 includes: S31b, first couple the pre-pressing member 40 to the pressing block 50, and then install the piezoelectric actuator 30 on the pre-pressing member 40 to form a pre-pressing driving assembly.

[0162] Furthermore, in some embodiments, step S4 further includes the steps of: S41. Install the lower pressing arm 52 of the pressing block 50 on the fixed portion 10. The friction head 32 of the piezoelectric actuator 30 faces the first movable side wall 21 abutting against the movable portion 20. The pressing block 50 holds the first movable side wall 21 between the friction head 32 of the piezoelectric actuator 30 and the first supporting portion 61. The first supporting portion 61 provides a supporting force for the movable portion 20 along the second direction. S42 , the pre-pressing member 40 is deformed under the action of the pressing block 50 and the first supporting portion 61 , providing a pre-pressing force in the opposite direction of the supporting force and in the same direction as the downward force.

[0163] Specifically, in step S41 , the pressing block 50 is installed in the first receiving groove 112 of the fixing portion 10 .

[0164] Furthermore, after assembling the piezoelectric actuator 30, the pre-pressed part 40 and the pressing block 50, the pressing block 50 is assembled on the fixed part 10 to complete the assembly process, which can simplify the entire assembly process and further reduce the problems of tilting of the movable part 20 and poor assembly consistency of the camera module caused by assembly errors.

[0165] It should be understood that the above assembly method can also be applied to Figures 15 to 24 In the modified embodiment shown, further, in step S31 , the pre-pressing member 40 further includes an intermediate connecting member 44 , which is fixed to the elastic portion 42 , so that the elastic portion 42 is fixed to the piezoelectric actuator 30 via the intermediate connecting member 44 .

[0166] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A driving device, characterized in that: include: A movable portion, configured to carry an optical lens, wherein the optical lens defines an optical axis, the movable portion comprising a first movable side wall and a second movable side wall opposite to each other, wherein the second movable side wall has a slot; a fixed portion, wherein the movable portion is movably disposed within the fixed portion; a piezoelectric actuator, in frictional contact with the top of the first movable side wall, for driving the movable portion to move along the optical axis; a pre-pressing member, disposed on top of the piezoelectric actuator and applying a pre-pressing force perpendicular to the optical axis to the first movable side wall; The damping structure includes a damping bracket and a damping member, wherein the damping bracket is arranged on the fixing portion, and the damping member extends from the plane where the damping bracket is located toward the second movable side wall, and at least a portion of the damping member extends into the slot of the second movable side wall.

2. The driving device according to claim 1, characterized in that The damping bracket includes a main body, a mounting portion and a side connecting portion, the mounting portion is located at both ends of the main body, the plane where the main body is located is parallel to the optical axis direction, the plane where the mounting portion is located is perpendicular to the optical axis direction, the side connecting portion is bent and extended from the plane where the main body is located along the second direction, the plane where the side connecting portion is located is perpendicular to the plane where the main body is located and the plane where the mounting portion is located, wherein the second direction is perpendicular to the optical axis direction.

3. The driving device according to claim 2, characterized in that The fixing portion includes a first fixed side wall and a second fixed side wall opposite to each other, the second fixed side wall has an opening, at least a portion of the second movable side wall is located in the opening, the mounting portion is fixed to the second fixed side wall, and the main body covers the opening.

4. The driving device according to claim 3, characterized in that The damping member includes a first part and a second part, the first part is connected to the main body of the damping bracket, the second part is connected to the first part, and the second part does not contact the main body of the damping bracket, wherein the length of the second part along the optical axis direction is smaller than the length of the first part along the optical axis direction.

5. The driving device according to claim 4, characterized in that The length of the second portion along the optical axis is smaller than the length of the slot along the optical axis.

6. The driving device according to claim 4, characterized in that A height of the second portion along the second direction is greater than a height of the first portion along the second direction.

7. The driving device according to claim 6, characterized in that A height of the second portion along the second direction is smaller than a height of the slot along the second direction.

8. The driving device according to claim 4, characterized in that Along the second direction, at least a portion of the main body abuts against the top of the second fixed side wall, and a certain gap is formed between at least a portion of the main body and the top of the second movable side wall.

9. The driving device according to claim 8, characterized in that The first portion includes a top surface and a bottom surface opposite to each other in a second direction, and a gap is formed between the bottom surface of the first portion and the top of the second movable sidewall.

10. The driving device according to claim 8, characterized in that The slot of the second movable sidewall has an inner sidewall parallel to the second direction, the second portion of the damping member has an inner surface parallel to the second direction, and a gap is formed between the inner sidewall and the inner surface.

11. The driving device according to claim 10, characterized in that: When the movable portion moves along the optical axis, the inner sidewall of the slot contacts the inner surface of the second portion, and the second portion moves or deforms toward the side where the inner sidewall is not in contact with the inner surface under the action of force.

12. A camera module, characterized in that: include: A drive device as claimed in any one of claims 1 to 11; Light deflection element for deflecting incident light. an optical lens, wherein the optical lens is held on a light deflection path of the light deflection element; The photosensitive component is used to receive light from the optical lens.

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