Driving device and camera module thereof

Abstract

The application discloses a driving device and a camera module thereof, and belongs to the field of camera modules. The driving device comprises a movable part, a fixed part, a piezoelectric actuator, a pre-pressing part, a magnetic attraction assembly, a first supporting part and a second supporting part. The movable part is used for bearing an optical lens, and the movable part is arranged in the fixed part. The movable part comprises opposite first and second movable side walls. The bottom of the first movable side wall is provided with a first guide groove, and the bottom of the second movable side wall is provided with a second guide groove. The first supporting part comprises at least two supporting balls, and the second supporting part comprises at least one supporting ball. The at least two supporting balls of the first supporting part are arranged in the first guide groove as a main guide part, and the at least one supporting ball of the second supporting part is arranged in the second guide groove as an auxiliary supporting part. The driving device and the camera module thereof have the advantages of convenient assembly, prevention of overturning of the optical lens and improvement of the stability of the camera module.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of camera modules, in particular to a driving device and a camera module thereof. BACKGROUND

[0002] At present, with the continuous development of electronic devices towards miniaturization and high performance, as one of the standard configurations of electronic devices, the user's requirements for the small size and high imaging capability of the camera module have become more and more strict. In order to further improve the user experience, the industry is actively improving the compact design and functional integration of the camera module. Through technical innovation and functional integration, the industry is continuously promoting the development of the camera module towards more compact and intelligent, further realizing the functions of automatic focusing, zooming, anti-shake and telephoto.

[0003] The periscopic camera module is a special camera module that changes the path of light through a light path turning element, so that it can be placed horizontally in electronic devices such as mobile phones, solving the problem of excessive height of the long-focus camera module caused by the excessive length of the long-focus lens optical total length. This design allows the camera to provide longer focal length and higher zoom capability without increasing the module thickness. SUMMARY

[0004] One purpose of the present application is to provide a driving device and a camera module thereof, by arranging a magnetic attraction assembly and a pre-pressing piece on both sides of the movable part respectively, the pre-pressing force generated by the pre-pressing piece and the magnetic attraction force generated by the magnetic attraction assembly make the force on the movable part more uniform, avoiding the problem of overturning of the camera module affecting the imaging effect.

[0005] Another purpose of the present application is to provide a driving device and a camera module thereof, which helps to prevent the optical lens from overturning, further enhancing the stability of the optical lens.

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

[0007] To achieve the above purposes, the technical scheme adopted by the present application is as follows: a driving device, comprising:

[0008] a movable part for carrying an optical lens, the optical lens defining an optical axis, the movable part comprising opposite first and second movable side walls, the bottom of the first movable side wall having a first guide groove, and the bottom of the second movable side wall having a second guide groove;

[0009] a fixed part, the movable part being movably arranged in the fixed part;

[0010] 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;

[0011] 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 guide groove, wherein the pre-pressing force direction intersects with the plane where the inner surface of the first guide groove lies;

[0012] a magnetic attraction component, close to the second guide slot and applying a magnetic attraction force perpendicular to the optical axis to the second guide slot, wherein the direction of the magnetic attraction force is perpendicular to the plane where the inner surface of the second guide slot is located;

[0013] A first support part and a second support part, the first support part includes at least two support balls, the second support part includes at least one support ball, the at least two support balls of the first support part are tightly arranged in the first guide groove as the main guide part, and the at least one support ball of the second support part is loosely arranged in the second guide groove as the auxiliary support part.

[0014] Preferably, the projection of the pre-pressed part along the second direction, the projection of the piezoelectric actuator along the second direction and the projection of the first support portion along the second direction overlap, the projection of the second support portion along the second direction and the projection of the magnetic assembly along the second direction do not overlap, and the second direction is perpendicular to the optical axis direction.

[0015] As another preferred embodiment, the driving device further includes a pressure block fixed to the fixed part, and the pressure block, the pre-pressed part and the piezoelectric actuator are located in sequence on the top of the first movable side wall along the second direction, and the projection of the first support part along the second direction is all located within the projection range of the pressure block along the second direction.

[0016] Further preferably, the piezoelectric actuator includes a piezoelectric active part and a friction head that are connected to each other, and under the action of the pre-pressing member, the friction head always maintains friction contact with the top of the movable part, wherein the pressure block, the pre-pressing member, the friction head and the first support part are passed through by an imaginary line parallel to the second direction, and the cross-sectional center of the pressure block, the position where the friction head acts on the movable part and the cross-sectional center of the first support part are aligned in the second direction.

[0017] Further preferably, the magnetic attraction force and the pre-pressure force are parallel to each other and have the same direction, and the pre-pressure force is greater than the magnetic attraction force.

[0018] Further preferably, the first support part comprises at least two support balls and at least one small ball located between the two support balls, the at least two support balls and the at least one small ball of the first support part are arranged in the first guide groove, the pre-pressure is applied to the line connecting the at least two support balls of the first support part, and the magnetic attraction force is applied to the position close to the second support part.

[0019] Further preferably, the first support part is in contact with the first guide groove at two points, and the second support part is in contact with the second guide groove at one point.

[0020] Further preferably, the first guide groove is provided with two oppositely arranged side walls, and an included angle is formed between the planes where the two side walls are located, the first support part is in frictional contact with the two side walls of the first guide groove, so that the first support part is arranged in the first guide groove in a tight fit, and the second guide groove is provided with a bottom wall, the second support part is in frictional contact with the bottom wall of the second guide groove, so that the second support part is arranged in the second guide groove in a loose fit.

[0021] Further preferably, the line connecting the first support part and the second support part intersects the plane where the side wall of the first guide groove is located, and the line connecting the first support part and the second support part is parallel to the plane where the bottom wall of the second guide groove is located.

[0022] Further preferably, the first magnetic attraction member is arranged in the fixed part, the second magnetic attraction member is arranged in the movable part, and the second magnetic attraction member is arranged between the first support part and the second support part and close to the second support part, the first magnetic attraction member and the second magnetic attraction member are oppositely arranged along the second direction and interact to generate a magnetic attraction force, and along the first direction, the distance from the second magnetic attraction member to the second support part is less than the distance from the second magnetic attraction member to the first support part.

[0023] Further preferably, the first magnetic attraction member is a metal magnetic yoke, the first magnetic attraction member comprises a base part and a supporting part, at least a part of the base part is projected on the second direction and overlaps the projection of the second magnetic attraction member on the second direction, and at least a part of the supporting part is projected on the second direction and overlaps the projection of the second support part on the second direction.

[0024] To achieve one of the purposes of the present application, the technical solution adopted by the present application is a camera module, which comprises:

[0025] Any one of the above driving devices;

[0026] a light turning element for turning the incident light rays,

[0027] An optical lens is held on the light-turning path of the light-turning element.

[0028] A light-sensing component is used to receive light from the optical lens. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the camera module in some embodiments of the present application.

[0030] Figure 2 It is an exploded structural schematic diagram of the camera module in some embodiments of the present application.

[0031] Figure 3 It is an exploded structural schematic diagram of the driving device in some embodiments of the present application.

[0032] Figure 4 It is an exploded structural schematic diagram of the camera module in some embodiments of the present application.

[0033] Figure 5 It is a sectional structural schematic diagram of the driving device in the optical axis direction in some embodiments of the present application.

[0034] Figure 6 It is a sectional structural schematic diagram of the driving device in the optical axis direction in some embodiments of the present application.

[0035] Figure 7 It is a sectional structural schematic diagram of the camera module in the first direction in some embodiments of the present application.

[0036] Figure 8 It is a bottom view schematic diagram of the camera module structure in some embodiments of the present application.

[0037] Figure 9 It is a bottom view schematic diagram of the camera module structure in some embodiments of the present application.

[0038] Figure 10 It is a bottom view schematic diagram of the camera module structure in some embodiments of the present application.

[0039] Figure 11 It is a bottom view schematic diagram of the camera module structure in some embodiments of the present application. Figure 6 It is a schematic diagram of the assembly process of the first support part, the second support part and the fixed part of the driving device in the embodiment shown.

[0040] Figure 12 It is a schematic diagram of the assembly process of the movable part of the driving device in the embodiment shown. Figure 6

[0041] It is a schematic diagram of the assembly process of the piezoelectric actuator and the pre-pressing part of the driving device in the embodiment shown. Figure 13 Figure 6 It is a schematic diagram of the assembly process of the piezoelectric actuator and the pre-pressing part of the driving device in the embodiment shown.​

[0042] Figure 14 As Figure 6 The assembly process of the driving device and the pre-pressing piece in the embodiment is shown in the schematic view.

[0043] Figure 15 The bottom view of the camera module structure in some other embodiments of the present application is shown in the schematic view.

[0044] Figure 16 The cross-sectional structure of the camera module in the first direction in some other embodiments of the present application is shown in the schematic view.

[0045] Figure 17 The cross-sectional structure of the camera module in the optical axis direction in some other embodiments of the present application is shown in the schematic view.

[0046] In the figure: 10, fixed part; 11, first fixed side wall; 111, first guide rail; 112, first containing groove; 113, second containing groove; 114, base extension; 1141, second mounting plane; 12, fixed main body; 13, second fixed side wall; 131, second guide rail; 14, conductive part; 141, conductive part; 20, movable part; 21, first movable side wall; 211, first guide groove; 22, friction part; 23, second movable side wall; 231, second guide groove; 30, piezoelectric actuator; 31, piezoelectric active part; 32, friction head; 33, conductive part; 331, first connecting part; 333, second connecting part; 334, conductive part; 34, buffer part; 40, pre-pressing piece; 41, fixed end; 411, fixed hole; 42, elastic part; 43, bending part; 44, intermediate connecting part; 50, pressing block; 51, lower pressing beam; 52, lower pressing arm; 521, lower pressing fixed platform; 522, lower pressing mounting platform; 523, first mounting plane; 524, mounting column; 500, groove; 61, first supporting part; 611, supporting ball; 612, small ball; 62, second supporting part; 70, magnetic attraction assembly; 71, first magnetic attraction part; 711, base part; 712, supporting part; 72, second magnetic attraction part; 80, light sensing assembly; 90, light turning element; 100, optical lens. DETAILED DESCRIPTION

[0047] In the following, the present application will be further described in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, the following described embodiments or technical features can be combined in any manner to form new embodiments.

[0048] 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, indicating the orientation and position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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.

[0049] 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.

[0050] 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.

[0051] According to one aspect of the present application, a driving device for a camera module is provided, such as Figures 1 to 17As 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 magnetic attraction assembly 70, a first support part 61 and a second support part 62. 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 relative to each other. The bottom of the first movable side wall 21 has a first guide groove 211, and the bottom of the second movable side wall 23 has a second guide groove 231. The movable part 20 is movably arranged in the fixed part 10. The piezoelectric actuator 30 is in friction contact with the top of the first movable side wall 21 to drive the movable part 20 to move along the optical axis. The pre-pressed part 40 is arranged on the piezoelectric actuator 31. 0, and applies a pre-pressure perpendicular to the optical axis direction to the first guide groove 211, wherein the direction of the pre-pressure intersects with the plane where the inner surface of the first guide groove 211 is located, the magnetic attraction component 70 is close to the second guide groove 231 and applies a magnetic attraction force perpendicular to the optical axis direction to the second guide groove 231, wherein the direction of the magnetic attraction force is perpendicular to the plane where the inner surface of the second guide groove 231 is located, the first support portion 61 includes at least two support balls 611, and the second support portion 62 includes at least one support ball 611. The at least two support balls 611 of the first support portion 61 are arranged in the first guide groove 211 as the main guide portion, and the at least one support ball 611 of the second support portion 62 is arranged in the second guide groove 231 as the auxiliary support portion. The present application drives at the top of the first movable side wall 21 of the movable part 20, performs magnetic attraction at the bottom of the movable part 20 near the second movable side wall 23, and coordinates the driving and magnetic attraction with the first guide groove 211, the second guide groove 231, the first support part 61 and the second support part 62, which helps to improve the stability and contact flatness of the periscope camera module, reduce the risk of overturning of the optical lens 100, solve the tilt and consistency problems in the periscope camera module, and simplify the assembly difficulty.

[0052] Among them, such as 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 along the Y axis, the second direction is defined as the height direction of the periscope camera module along the Z axis, and the optical axis direction is defined as the length direction of the periscope camera module along the X axis. It is understood that the setting of this coordinate system is also applicable to other variant embodiments of the present application.

[0053] In some embodiments, as Figures 4 to 10As shown, the first support part 61 and the second support part 62 each include at least two support balls 611 arranged along the optical axis direction. The first guide groove 211 and the second guide groove 231 are segmented guide grooves, i.e., the number of the first guide groove 211 is two, and the number of the second guide groove 231 is two. The two segments of the first guide groove 211 are arranged along the optical axis direction, and the two segments of the second guide groove 231 are arranged along the optical axis direction. Each of the first guide groove 211 and the second guide groove 231 is provided with a support ball 611 to stably support the bottom of the movable part 20, reduce shaking and deviation during movement, and improve the stability and reliability of the driving device.

[0054] In some embodiments, the interval between the at least two support balls 611 of the first support part 61 is greater than the interval between the at least two support balls 611 of the second support part 62, i.e., the interval between the two support balls 611 on the two sides of the bottom of the movable part 20 is different. The first support part 61 is the main guide end, and the second support part 62 is the auxiliary support end. When the movable part 20 is tilted, the second support part 62 can be fine-tuned to avoid the movable part 20 from overturning. At the same time, the interval between the two support balls 611 of the first support part 61 is greater, thereby increasing the support area to improve the stability of the driving device.

[0055] It should be understood that, due to the size limitation of the driving device and the optical lens 100, the length of the movable part 20 along the optical axis direction is fixed, i.e., the length of the movable part 20 along the optical axis direction cannot be infinitely large or infinitely small. Further, the two segments of the first guide groove 211 and the two segments of the second guide groove 231 are arranged along the optical axis direction on the opposite sides of the bottom of the movable part 20, which limits the length of each of the first guide groove 211 and the second guide groove 231 along the optical axis direction. When each support ball 611 is arranged in each of the first guide groove 211 and the second guide groove 231, the shorter each of the first guide groove 211 and the second guide groove 231 limits the movement position of the support ball 611, thereby limiting the movement stroke of the movable part 20. Moreover, when a single support ball 611 is limited in the shorter each of the first guide groove 211 and the second guide groove 231, the risk of the support ball 611 being stuck increases, which causes the support ball 611 to generate sliding friction to increase the friction, affecting the stability and reliability of the driving device and also affecting the driving effect of the driving device.

[0056] To solve the above problems, the present application also provides another embodiment, as Figures 15 to 17As shown, the first support part 61 comprises at least two support balls 611 arranged along the optical axis direction, and the second support part 62 comprises at least one support ball 611, i.e. the at least two support balls 611 of the first support part 61 are arranged in a first guide groove 211, and the at least one support ball 611 of the second support part 62 is arranged in a second guide groove 231. It can be understood that, since the first guide groove 211 and the second guide groove 231 are arranged on the opposite sides of the bottom of the movable part 20 respectively, the length of the first guide groove 211 and the second guide groove 231 along the optical axis direction can be longer, for example, the first guide groove 211 and the second guide groove 231 can penetrate through the bottom of the movable part 20 along the optical axis direction. In this way, the movement space of the support balls 611 in the first guide groove 211 and the second guide groove 231 is larger, and the flexibility of the support balls 611 is also larger, which can reduce the risk of sliding friction of the support balls 611, and further reduce the friction force when the support balls 611 roll. Moreover, when the at least two support balls 611 of the first support part 61 move in the first guide groove 211, the flexibility of the support balls 611 is larger, which can reduce the risk of the support balls 611 being stuck, and further improve the reliability and stability of the driving device. This is because the movement state of a single support ball 611 is uncertain, and the support ball 611 can be in a rolling state or a sliding state, and the increase of the number of support balls 611 in the first guide groove 211 can compensate for the movement state of the support balls 611.

[0057] Further, as known from the foregoing, since the piezoelectric actuator 30 is driven at the top of the first movable side wall 21, the pre-pressing member 40 generates a pre-pressing force parallel to the second direction at the top of the piezoelectric actuator 30, which makes the pre-pressing force mainly act on the first support part 61 on the same side as the piezoelectric actuator 30. The magnetic attraction assembly 70 is arranged at the bottom of the movable part 20 close to the second support part 62, which makes the magnetic attraction force generated by the magnetic attraction assembly 70 mainly act on the second support part 62 on the side different from the piezoelectric actuator 30, and the pre-pressing force is greater than the magnetic attraction force. That is, the first support part 61 is subjected to a greater force than the second support part 62, which may lead to: on the one hand, due to the unilateralism of the movable part 20, for example, the first movable side wall 21 is subjected to a greater force, the first movable side wall 21 and the second movable side wall 23 of the movable part 20 are subjected to uneven forces, and thus are prone to overturning, affecting the stability of the driving device; on the other hand, the first support part 61 is subjected to a greater force, making the support balls 611 of the first support part 61 more prone to pits, especially when falling or colliding, a greater impact force acts on the first support part 61, making the first support part 61 more prone to pits, affecting the driving effect; on the other hand, the first support part 61 is subjected to a greater force, making the support balls 611 of the first support part 61 more prone to sliding friction during movement of the movable part 20 along the optical axis, even to the extent of being stuck, affecting the performance of the driving device.

[0058] In the present application, the structure of the first guide groove 211 and the second guide groove 231 is arranged, that is, the pre-pressing force direction intersects the plane in which the inner surface of the first guide groove 211 is located, the magnetic attraction force direction is perpendicular to the plane in which the inner surface of the second guide groove 231 is located, and at least two support balls 611 of the first support part 61 are arranged in one first guide groove 211, and at least one support ball 611 of the second support part 62 is arranged in one second guide groove 231. In this way, the at least two support balls 611 of the first support part 61 can serve as the main guide part in the first guide groove 211, and the at least one support ball 611 of the second support part 62 can serve as the auxiliary support part in the second guide groove 231. Among them, the main guide part is used for guiding when the movable part 20 moves along the optical axis, guiding the long movement stroke of the movable part 20 along the optical axis, improving the driving precision of the driving device; the auxiliary support part supports when the movable part 20 moves along the optical axis, reduces the risk of overturning of the movable part 20 during movement, and improves the reliability and stability of the driving device.

[0059] It can be understood that, due to the first support part 61 and the first movable side wall 21 being subjected to greater pre-pressing force, the second support part 62 and the second movable side wall 23 being subjected to smaller magnetic attraction force, it is more likely for the driving device to be subjected to the risk of overturning towards the first support part 61. The linear distance between the contact point of the piezoelectric actuator 30 and the movable part 20 and the first support part 61 is the force arm value corresponding to the overturning torque of the movable part 20, and by arranging the first support part 61 as the main guiding part on the same side as the piezoelectric actuator 30 and the pre-pressing member 40, the force arm value can be reduced, and the overturning torque value of the movable part 20 around the optical axis can be reduced, thereby reducing the risk of overturning of the movable part 20.

[0060] That is, even in the case where the first movable side wall 21 and the second movable side wall 23 of the movable part 20 are subjected to uneven stress due to the difference in the pre-pressing force and the magnetic attraction force, the cooperation of the first guide groove 211 and the first support part 61 and the cooperation of the second guide groove 231 and the second support part 62 can reduce the risk of overturning of the movable part 20. Moreover, since the magnetic attraction force generated by the magnetic attraction assembly 70 and the pre-pressing force generated by the pre-pressing member 40 mainly act on the first movable side wall 21 and the second movable side wall 23 located on opposite sides, respectively, the second support part 62 acts as an auxiliary support part on the side with smaller magnetic attraction force by the cooperation of the second guide groove 231 and the second support part 62, and the first support part 61 acts as a main guiding part on the side with greater pre-pressing force by the cooperation of the first guide groove 211 and the first support part 61, thereby avoiding the shaking of the movable part 20 and reducing the risk of overturning of the movable part 20.

[0061] In some embodiments, the number of support balls 611 of the first support part 61 is greater than the number of support balls 611 of the second support part 62. Since the first support part 61 is subjected to greater force than the second support part 62, the greater number of support balls 611 of the first support part 61 can disperse the stress and reduce the risk of indentation or jamming of the support balls 611 of the first support part 61. Further, the first support part 61 is arranged on the same side as the piezoelectric actuator 30 and the pre-pressing member 40, and the greater number of support balls 611 of the first support part 61 can increase the support area on this side to avoid the tilting of the movable part 20.

[0062] Specifically, the first support part 61 includes two support balls 611 and small balls 612 located between the two support balls 611, the diameter of the small balls 612 is smaller than that of the support balls 611, and a plurality of small balls 612 are arranged between the support balls 611. The number of small balls 612 can be greater than or equal to the number of support balls 611, because the more the number of small balls 612, the greater the distance between the two support balls 611 located at both ends of the small balls 612, so that the support area is also larger, which can avoid the inclination of the movable part 20, and also reduce the wear degree of the surface of the support ball 611. Further, when falling or impact occurs, the impact force can be dispersed by the small balls 612 to avoid the concave of the support ball 611 affecting the driving effect. Further, the small balls 612 can also keep the support balls 611 in rolling friction, reduce the risk of sliding friction and jamming, and improve the reliability and stability of the driving device.

[0063] In some embodiments, the piezoelectric actuator 30 is arranged on the top of at least a part of the movable part 20 along a second direction, at least a part of the pre-pressing piece 40 is clamped between the piezoelectric actuator 30 and the pressing block 50 along the second direction, the pressing block 50 controls the deformation of the pre-pressing piece 40 to generate a pre-pressing force along the second direction, and the piezoelectric actuator 30 and the movable part 20 abut under the action of the pre-pressing force, wherein the second direction is perpendicular to the optical axis direction. Since the pre-pressing piece 40 and the pressing block 50 are arranged above the height direction of the camera module distributed along the Z axis, the pressing block 50 is coupled with the pre-pressing piece 40, and then the pressing block 50 is designed to be mounted on the fixed part 10 from the top, which helps to simplify the assembly process of the camera module, further reduces the inclination of the movable part 20 and the poor consistency of the camera module caused by assembly errors, and improves the imaging stability of the camera module. Further, the pressing block 50 can also adjust the deformation degree of the pre-pressing piece 40 to adjust the size of the pre-pressing force, thereby improving the performance of the driving device. Further, the pressing block 50 can also protect the pre-pressing piece 40, avoid interference between the pre-pressing piece 40 and other components in the driving device during deformation, and further affect the performance of the pre-pressing piece 40.

[0064] Moreover, the pre-pressing piece 40 applies a pre-pressing force perpendicular to the optical axis to the movable part 20, which can also ensure the close contact between the piezoelectric actuator 30 and the movable part 20, reduce the mechanical gap, improve the structural rigidity, and avoid displacement error or vibration interference caused by the gap when adjusting the focal length of the camera module.

[0065] Reference Figures 3 to 6It can be known that, in some embodiments, the piezoelectric actuator 30 comprises the piezoelectric active part 31 and the friction head 32, and due to the pre-pressing force applied by the pre-pressing part 40 to the piezoelectric actuator 30 in the second direction, the friction part 22 of the movable part 20 and the friction head 32 in the piezoelectric actuator 30 are always kept in friction contact, which is beneficial to the movement of the movable part 20 in the optical axis direction after the piezoelectric active part 31 receives the voltage, reduces the shaking and the generated tilt of the optical lens 100 in the driving process, and further improves the imaging accuracy and imaging stability of the camera module in the auto-focusing process. It can be understood that, by keeping the movable part 20 and the friction head 32 in mutual abutment, the movable part 20 can move smoothly and quickly when being driven, further improving the response speed of the movable part 20 to the piezoelectric actuator 30, and shortening the time consumed in the focusing process. Further, while improving the driving force provided by the piezoelectric actuator 30, the stability of the camera module is enhanced, the image jitter is reduced, and thus the imaging quality is improved.

[0066] Reference Figure 5 With Figure 6 It can be known that, in some embodiments, the fixed part 10 is provided with the first accommodating groove 112 and the second accommodating groove 113, the first accommodating groove 112 and the second accommodating groove 113 are located on the same side of the fixed body 12 in the second direction, the first accommodating groove 112 is communicatively located at the upper part of the second accommodating groove 113, the pressing block 50 is arranged in the first accommodating groove 112, and one side of the movable part 20 is accommodated in the second accommodating groove 113. Specifically, since the length of the first accommodating groove 112 in the optical axis direction is greater than the length of the second accommodating groove 113 in the optical axis direction, the pressing block 50 accommodated in the first accommodating groove 112 can be fixed to the fixed part 10, further increasing the stability and reliability of the pressing block 50. Further, the pressing block 50 is arranged in the first accommodating groove 112, the movable part 20 is arranged in the second accommodating groove 113, and the pre-pressing part 40 and the piezoelectric actuator 30 are sequentially arranged between the pressing block 50 and the movable part 20, so that the structure is more compact and the space utilization rate inside the camera module is increased.

[0067] It can be understood that the length of the second accommodating groove 113 in the optical axis direction is greater than the length of the movable part 20 in the optical axis direction, so as to provide space for at least part of the movable part 20 to move in the optical axis direction when being driven by the piezoelectric actuator 30 in the second accommodating groove 113.

[0068] In some embodiments, the first support portion 61 is arranged between the fixed portion 10 and the movable portion 20 along the second direction, the upper portion and the bottom portion of at least a part of the movable portion 20 are respectively kept in frictional contact with the piezoelectric actuator 30 and the first support portion 61, and in the driving device, the pre-pressing member 40, the piezoelectric actuator 30, the movable portion 20 and the first support portion 61 are sequentially clamped between the pressing block 50 and the fixed portion 10 along the second direction, wherein the first support portion 61 provides an upward supporting force for the movable portion 20 along the second direction, the pre-pressing member 40 is deformed under the joint action of the first support portion 61 and the pressing block 50, and then the pre-pressing member 40 provides a downward pre-pressing force along the second direction. It can be understood that if the pressing block 50 and the fixed portion 10 are not fixed, the pre-pressing member 40 and the pressing block 50 will move upward along the second direction under the action of the first support portion 61, causing the pressing block 50, the pre-pressing member 40 and the piezoelectric actuator 30 to be separated from the movable portion 20, and then the pre-pressing member 40 cannot be deformed and cannot generate a pre-pressing force, affecting the driving. In order to avoid the above situation, the pressing block 50 and the fixed portion 10 are fixedly connected in the present application, and then under the action of the first support portion 61, the pressing block 50 will generate a downward pressing force along the second direction due to the connection with the fixed portion 10, on the one hand, it can avoid the separation of the pre-pressing member 40 and the pressing block 50; on the other hand, it can keep the deformation of the pre-pressing member 40, and then ensure the generation of the pre-pressing force. The direction of the pre-pressing force is the same as the direction of the downward pressing force, the direction of the downward pressing force is opposite to the direction of the supporting force, and the direction of the pre-pressing force is opposite to the direction of the supporting force. It can be understood that if only the pre-pressing force acts on the top of the single-sided movable portion 20, it may increase the risk of overturning of the movable portion 20. Therefore, in order to keep the force balance of the movable portion 20, the first support portion 61 provides a supporting force opposite to the direction of the pre-pressing force to balance the pre-pressing force, thereby reducing the risk of overturning of the movable portion 20.

[0069] In some embodiments, the second support portion 62 is arranged between the fixed portion 10 and the movable portion 20 along the second direction, the second support portion 62 and the first support portion 61 are oppositely arranged on both sides of the bottom portion 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 opposite first and second sides, the first support portion 61 is arranged on the first side close to the piezoelectric actuator 30, and the first support portion 61 is tightly clamped between the movable portion 20 and the fixed portion 10, the second support portion 62 is arranged on the second side away from the piezoelectric actuator 30, and the second support portion 62 is loosely clamped between the movable portion 20 and the fixed portion 10, so as to realize that the first support portion 61 is the main guide portion and the second support portion 62 is the auxiliary support portion as mentioned above.

[0070] Since the pre-pressing piece 40 is only arranged on one side of the movable part 20, the support force provided by the second support part 62 to the bottom of the other side of the movable part 20 further balances the pre-pressing force generated on one side of the movable part 20, which on one hand avoids that the friction force generated due to the surface contact between the movable part 20 and the fixed part 10 is too large, resulting in poor driving effect, and on the other hand, the arrangement of the second support part 62 is beneficial to improve the parallelism when the movable part 20 moves, further improve the stability of the optical lens 100, and enhance the imaging quality of the camera module.

[0071] In some embodiments, the projection of the pre-pressing piece 40 along the second direction, the projection of the piezoelectric actuator 30 along the second direction, and the projection of the first support part 61 along the second direction overlap, and the projection of the second support part 62 along the second direction and the projection of the magnetic attraction assembly 70 along the second direction do not overlap, wherein the second direction is perpendicular to the optical axis direction. In this way, the pre-pressing force generated by the pre-pressing piece 40 can be directly transmitted to the piezoelectric actuator 30 and the first support part 61, thereby improving the driving accuracy of the piezoelectric actuator 30 and the support accuracy of the first support part 61, and reducing the risk of overturning of the movable part 20.

[0072] It can be understood that since the pre-pressing force generated by the pre-pressing piece 40 directly acts on the first support part 61 without directly acting on the second support part 62, if the projection of the second support part 62 along the second direction and the projection of the magnetic attraction assembly 70 along the second direction overlap, the second movable side wall 23 supported by the second support part 62 may not be driven due to the fact that the magnetic attraction force acting on the second support part 62 is too large and the pre-pressing force is too small, thereby affecting the driving effect of the driving device. Therefore, in the present application, the projection of the second support part 62 along the second direction and the projection of the magnetic attraction assembly 70 along the second direction do not overlap to avoid the magnetic attraction force directly acting on the second support part 62, thereby achieving better driving effect through cooperation with the pre-pressing piece 40, the piezoelectric actuator 30 and the first support part 61.

[0073] It can be understood that the first support part 61 is simultaneously tightly fitted and abuts between the fixed part 10 and the movable part 20, that is, the first support part 61 is tightly fitted in the first guide groove 211, and the second support part 62 is loosely fitted between the fixed part 10 and the movable part 20, that is, the second support part 62 is loosely fitted in the second guide groove 231, and there is a gap between the second support part 62 and the fixed part 10 and / or the movable part 20, and the existence of the gap can provide a certain pre-positioning space for adjusting the position of the movable part 20. In other words, when the movable part 20 is driven by the piezoelectric actuator 30, the first support part 61 always provides stable support to the movable part 20 to ensure the parallelism of the movable part 20 when moving. In the case of inclination of the movable part 20, the gap at the second support part 62 can provide a certain amount of space for the position adjustment of the movable part 20. And when the movable part 20 is inclined to a certain extent, it abuts the fixed part 10 and the movable part 20, which can correct the movement state of the movable part 20 to avoid further inclination, thereby avoiding the influence on the driving performance due to the inclination of the movable part 20. Further, this arrangement facilitates assembly, and the tight fit is conducive to the installation and positioning of the movable part 20, and the loose fit facilitates the adjustment of the movable part 20, further reduces the assembly tolerance, and improves the assembly precision of the camera module. It can be understood that in the present application, the inclination of the movable part 20 includes: inclination of the movable part 20 around the optical axis direction to produce a rotating movement trend, inclination of the movable part 20 around the first direction to produce a rotating movement trend, and inclination of the movable part 20 around the second direction to produce a rotating movement trend.

[0074] In some embodiments, the first support part 61 and the second support part 62 can also be simultaneously tightly fitted and abut between the fixed part 10 and the movable part 20, so as to always provide stable support to the movable part 20 through the first support part 61 and the second support part 62 to ensure the parallelism of the movable part 20 when moving, and reduce the risk of inclination of the movable part 20.

[0075] Further, when the movable part 20 is driven to move along the optical axis direction, the main supporting part is the first supporting part 61, 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 is assembled in a tight fit manner, 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 force arm value corresponding to the overturning moment of the movable part 20. By reducing the force arm value, the overturning moment value is further reduced, thereby avoiding the risk of the movable part 20 tilting. Further, the tight fit and loose fit assembly manners described above can be considered by the tolerance value in the assembly process. For example, the tolerance between the first supporting part 61 and the movable part 20 and the fixed part 10 is 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 large, for example, 0.02. At this time, when the movable part 20 does not tilt, the first supporting part 61 provides a supporting action to the movable part 20, and when the movable part 20 tilts, the second supporting part 62 provides a supporting action to the movable part 20 to right the movable part 20. This can to some extent reduce the possibility of the movable part 20 tilting, which helps to improve the imaging quality of the camera module.

[0076] In some embodiments, reference is made to Figure 2 With Figure 7 As shown, the first movable side wall 21 and the second movable side wall 23 are oppositely arranged along the first direction, the first movable side wall 21 is provided with a first guide groove 211 and a friction part 22, the first guide groove 211 is opened on the bottom surface of the first movable side wall 21 and oppositely arranged with the first guide rail 111 along the second direction, the first supporting part 61 is installed between the first guide rail 111 and the first guide groove 211, so that the bottom surface of the first movable side wall 21 abuts against the first supporting part 61, the friction part 22 is installed on the top surface of the first movable side wall 21 and abuts against the friction head 32 of the piezoelectric actuator 30, and the first movable side wall 21 is accommodated in the second accommodation groove 113. The second movable side wall 23 is provided with a second guide groove 231, the second guide groove 231 is opened on the bottom surface of the second movable side wall 23 and oppositely arranged with the second guide rail 131 along the second direction, and the second supporting part 62 is installed between the second guide rail 131 and the second guide groove 231, so that the bottom surface of the second movable side wall 23 abuts against the second supporting part 62. By assembling the supporting part structure between the guide rail and the guide groove structure, the supporting part is stably clamped between the movable part 20 and the fixed part 10, thereby increasing the stability of the camera module.

[0077] In some embodiments, as Figures 2 to 11As shown, the fixed part 10 further comprises a first fixed side wall 11, a second fixed side wall 13 and a fixed main body 12, the first fixed side wall 11 and the second fixed side wall 13 are oppositely arranged on two sides of the fixed main body 12 along the second direction, wherein the first fixed side wall 11 is located at the first side and the second fixed side wall 13 is located at the second side, that is, the first fixed side wall 11 and the second fixed side wall 13 are opposite sides. As shown in Figure 6 As shown, the first accommodating groove 112 and the second accommodating groove 113 are arranged in the first fixed side wall 11 along the second direction, so that the pressing block 50 abuts against the top of the first fixed side wall 11, the bottom of the first fixed side wall 11 is provided with a first guide rail 111, and the bottom of the second fixed side wall 13 is provided with a second guide rail 131. Among them, the first supporting part 61 is installed on the first guide rail 111 and supports the first side of the movable part 20, and the second supporting part 62 is installed on the second guide rail 131 and supports the second side of the movable part 20. The first supporting part 61 and the second supporting part 62 are arranged to reduce the frictional resistance force when the movable part 20 is driven to move, which is conducive 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 supporting part 61 and the second supporting part 62 are arranged flush along the first direction, providing smooth support for the movable part 20. Further, as shown in Figures 1 to 4 , and Figure 17 As shown, since the piezoelectric actuator 30 drives the top of the movable part 20, the first supporting part 61 and the second supporting part 62 are arranged flush at the bottom of the movable part 20 to provide stable support for the movable part 20, further improving the stability of the movable part 20 when driven along the optical axis direction. In other words, when the piezoelectric actuator 30 drives the movable part 20, the movable part 20 is clamped between the piezoelectric actuator 30 and the supporting part arranged opposite to the piezoelectric actuator 30 at the bottom of the movable part 20, so as to avoid the phenomenon that the movable part 20 is tilted during the driving process of the piezoelectric actuator 30. Further, no additional supporting part is arranged on the side or top of the movable part 20, thereby reducing the number of supporting parts in the camera module, optimizing the assembly process, further reducing the assembly tolerance, and increasing the consistency of the assembly.

[0078] Specifically, when friction occurs between the supporting part and the fixed part 10 and the movable part 20, the motion state of the supporting part is uncertain, and the supporting part can be in a rolling state or a sliding state, so that the friction between the supporting part and the movable part 20 changes. Since the supporting part can switch the motion state at will, reducing the number of supporting parts can reduce the risk of the movable part 20 tilting or overturning and the supporting part being stuck, and enhance the imaging performance of the camera module.

[0079] In some embodiments, the driving device further comprises an inner insert arranged at the abutting surface of the first guide rail 111 and the first support portion 61, so as to provide a more flat support surface for the first support portion 61. Further, the inner insert of the first guide rail 111 has the same shape as the first guide rail 111, for example, the first guide rail 111 is a V-shaped groove, and the inner insert also has a V-shaped structure; the first guide rail 111 is a U-shaped groove, and the inner insert also has a U-shaped structure, or the inner insert also has a flat structure. On the one hand, it helps to slow down the wear of the first support portion 61 when moving inside the first guide rail 111, prolonging the service life of the first support portion 61; it can also reduce the risk of the first support portion 61 being stuck during use, further improving the use quality and life of the camera module. On the other hand, it slows down the deformation phenomenon such as indentation of the first support portion 61 caused by excessive force under the action of the pressing force and the pre-pressing force, further enhancing the reliability of the camera module in use.

[0080] In some embodiments, the driving device further comprises an inner insert arranged at the abutting surface of the second guide rail 131 and the second support portion 62, so as to enhance the support effect on the second support portion 62. The inner insert of the second guide rail 131 has the same shape as the second guide rail 131, for example, the second guide rail 131 is a V-shaped groove, and the inner insert also has a V-shaped structure; the second guide rail 131 is a U-shaped groove, and the inner insert also has a U-shaped structure, or the inner insert also has a flat structure. Through the inner insert structure, on the one hand, it helps to slow down the wear of the second support portion 62 when moving inside the second guide rail 131, prolonging the service life of the second support portion 62; it can also reduce the risk of the second support portion 62 being stuck during use, further improving the use quality and life of the camera module.

[0081] In some embodiments, the first guide groove 211 and the second guide groove 231 in the movable portion 20 and the abutting surface of the support portion structure are also provided with an inner insert structure. That is, the first support portion 61 is in contact with the inner insert in the first guide groove 211 and the inner insert arranged in the first guide rail 111, respectively, and the second support portion 62 is in contact with the inner insert in the second guide groove 231 and the inner insert arranged in the second guide rail 131, respectively. Through the inner insert structure, the wear of the first support portion 61 when moving between the first guide rail 111 and the first guide groove 211 is slowed down, and the wear of the second support portion 62 when moving between the second guide groove 231 and the second guide rail 131 is slowed down, further improving the use quality and life of the camera module. On the other hand, it slows down the deformation phenomenon such as indentation of the first support portion 61 and the second support portion 62 caused by excessive force, further enhancing the reliability of the camera module in use.

[0082] Specifically, since the movable part 20 moves along the optical axis direction, the first support part 61 and the second support part 62 are arranged between the movable part 20 and the fixed part 10 to support the movable part 20 against gravity. To further maintain the stability of the optical lens 100, the first support part 61 and the second support part 62 are arranged as much as possible on both sides of the bottom of the movable part 20 relative to the optical axis in the first direction, to provide as much as possible symmetrical support force for the movable part 20, thereby reducing the risk of the movable part 20 tilting.

[0083] It can be understood that, since the second movable side wall 23 is not provided with a piezoelectric actuator 30 or the like, the length of the second movable side wall 23 along the optical axis direction does not need to be increased, in other words, the length of the second movable side wall 23 along the optical axis direction can be smaller than the length of the first movable side wall 21 along the optical axis direction, which is beneficial to increase the compactness of the driving device structure, and further reduce the weight of the movable part 20 and the size of the driving device. The piezoelectric actuator 30 and the pre-pressing part 40 are arranged at the top of the first movable side wall 21, on the one hand, making the internal space of the camera module more reasonable, because the piezoelectric actuator 30 and the pre-pressing part 40 both extend along the optical axis direction, and the first movable side wall 21 of the movable part 20 corresponding to them also needs to extend along the optical axis direction, that is, the first movable side wall 21 needs to have a certain length to increase the driving stroke of the piezoelectric actuator 30. Further, the first support part 61 is arranged on the bottom surface of the first movable side wall 21, and there is also longer space to arrange the first support part 61 to provide a larger support area through the first support part 61. On the contrary, since the piezoelectric actuator 30 does not need to be arranged on one side of the second movable side wall 23, a shorter length can be arranged to provide sufficient installation space for the second support part 62. In this way, on the one hand, not only can the compactness of the lens driving device structure be enhanced, but also the size of the lens driving device can be reduced. On the other hand, since the optical focusing stroke in the periscopic camera module is large, it is also helpful to always stably support the movable part 20 by the first support part 61 and the second support part 62 in the long stroke. Since the optical focusing stroke in the camera module is large, this design helps to ensure that the support part always effectively supports the movable part 20 in the long stroke.

[0084] In some embodiments, as shown in Figures 2 to 6 , and Figure 17 The movable part 20 further comprises 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-pressing force of the pre-pressing part 40. It can be understood that the provided friction part 22 helps to increase the friction force between the movable part 20 and the friction head 32 of the piezoelectric actuator 30, and further enhances the driving force provided by the piezoelectric actuator 30.

[0085] In some embodiments, the friction portion 22 can be integrally formed on the first movable side wall 21 of the movable portion 20, or the friction portion 22 and the movable portion 20 can be independent components, so that the friction portion 22 is attached to the first movable side wall 21 of the movable portion 20 by an adhesive, thereby forming a split structure with the movable portion 20. It can be understood that the provision of the friction portion 22 helps to enhance the friction force between the movable portion 20 and the friction head 32 of the piezoelectric actuator 30, which is beneficial to improving the driving performance in the camera module.

[0086] 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.

[0087] like Figure 4 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 receiving groove 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.

[0088] The recess 500 of the pressing block 50, the first accommodating groove 112 and the second accommodating groove 113 are communicated, at least a part of the pre-pressing piece 40 and the movable part 20 are clamped between the pressing block 50 and the fixed part 10, and at least a part of the pre-pressing piece 40 and the movable part 20 are located in the space communicated by the recess 500, the first accommodating groove 112 and the second accommodating groove 113. It can be understood that when the pressing block 50 is pressed more in the second direction, the clamping of at least a part of the pre-pressing piece 40 and the movable part 20 will be tighter, the deformation of the pre-pressing piece 40 will be larger, and the pre-pressing force generated by the pre-pressing piece 40 will be larger. In other words, the pressing block 50 not only provides a deformation space for the pre-pressing piece 40 and maintains the deformation of the pre-pressing piece 40, but also adjusts the size of the pre-pressing force generated by the pre-pressing piece 40, for example, by moving the pressing beam 51 downward in the second direction towards the movable part 20 to realize further pressing of the pressing block 50, thereby increasing the pre-pressing force of the pre-pressing piece 40.

[0089] In some embodiments, as shown in Figure 2 and Figure 11 The first fixed side wall 11 of the fixed part 10 further includes a base extension 114 and a second mounting plane 1141, the second accommodating groove 113 is formed between the base extensions 114, and the second mounting plane 1141 is located at the top surface of the base extensions 114, and the pressing fixed platform 521 of the pressing block 50 abuts against the second mounting plane 1141. It can be understood that the pressing arm 52 can be connected to the fixed part 10, and the pressing fixed platform 521 of the pressing arm 52 and the second mounting plane 1141 of the fixed part 10 can abut against each other, further enhancing the stability and reliability of the pressing block 50. Since the pressing beam 51 and the pressing mounting platform 522 are located in different height planes, the recess 500 formed provides a reserved space for the deformation of the pre-pressing piece 40. Further, by fixing the pressing block 50 to the fixed part 10, adjustments can be made during assembly, thereby reducing the risk of inconsistent assembly.

[0090] In some embodiments, as shown in Figure 3 and Figure 6 When the pre-pressing piece 40 is subjected to the supporting force provided by the first supporting part 61, the pre-pressing piece 40 generates a curved deformation protruding upward and generates a pre-pressing force downward in the second direction, as shown in Figure 6 , thereby providing a pre-pressing force downward in the second direction to the movable part 20, so that the friction head 32 in the piezoelectric actuator 30 and the friction part 22 of the movable part 20 are in frictional contact with each other, further providing a stable driving force. It can be understood that the flatness and consistency of the pre-pressing piece 40 are relatively good, which helps to reduce the deformation amount of the pre-pressing piece 40.

[0091] In some embodiments, the pre-pressing member 40 is an elastic member capable of generating deformation, so as to provide a pre-pressing force for driving the movable part 20 to maintain frictional contact with the piezoelectric actuator 30 after deformation, and thus the friction head 32 in the piezoelectric actuator 30 is in contact with the friction part 22 of the movable part 20 under the pre-pressing force to generate a frictional force, and the movable part 20 is driven to move. Specifically, as shown in Figures 3 to 6 the pre-pressing member 40 is a spring with a bending structure, which will generate a bending deformation protruding upward and generate a downward pre-pressing force after being subjected to the downward pressure provided by the pressing block 50 and the supporting force provided by the first supporting part 61. It can be understood that, due to the tolerances generated during assembly, the spring with a bending structure is less affected by the tolerance fluctuations within a certain pre-pressing force range, and thus the pre-pressing force provided by the spring with a bending structure has higher consistency.

[0092] In some embodiments, as shown in Figure 3 the pre-pressing member 40 includes a fixed end 41, an elastic part 42, and a bending part 43, wherein the bending part 43 is arranged between the fixed end 41 and the elastic part 42, the fixed end 41 is fixed to the pressing block 50, and the elastic part 42 is in abutment with the piezoelectric active part 31. It can be understood that the elastic part 42 and the bending part 43 can also be provided with a hollow structure, which further reduces the elastic coefficient, thereby helping to reduce the influence of material tolerances, assembly tolerances, or other displacement fluctuations on the pre-pressing force.

[0093] Further, when the pre-pressing member 40 is a spring, as shown in Figure 5 the spring can be bent during manufacturing to have a certain amount of deformation. Thus, after the spring is installed with the piezoelectric actuator 30 and the pressing block 50 during assembly, the deformation amount of the spring itself exerts a pre-pressing force on the piezoelectric actuator 30 and the movable part 20. In other words, the spring is pre-deformed before the subsequent assembly and fixing process, which exerts a greater pre-pressing force on the movable part 20, and is beneficial to improve the driving effect.

[0094] In some embodiments, the pre-pressing member 40 has a planar spring structure. It can be understood that the deformation of the pre-pressing member 40 is generated by the cooperation of the pressing block 50 and the first supporting part 61 before the piezoelectric actuator 30 is driven. The pre-pressing member 40 includes a fixed end 41 and an elastic part 42, the fixed end 41 is fixed to the pressing block 50, and the elastic part 42 is in abutment with the piezoelectric active part 31. When the pre-pressing member 40 is subjected to the downward pressure of the pressing block 50 and the supporting force of the first supporting part 61, the elastic part 42 of the pre-pressing member 40 will generate a bending deformation protruding upward and generate a downward pre-pressing force. The presence of the pre-pressing force is beneficial to maintain the frictional contact between the friction head 32 and the movable part 20 to generate a stable frictional force, and the piezoelectric actuator 30 further drives the movable part 20 to move, thereby enhancing the driving effect.

[0095] In some embodiments, as Figure 5 and 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 pressure exerted by the lower pressing beam 51 on the first support part 61 is stronger, 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 longer, 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.

[0096] In some embodiments, as Figure 3 As shown, each downward-pressing mounting platform 522 of the pressing block 50 is provided with a first mounting plane 523 and mounting posts 524. The mounting posts 524 protrude from the first mounting plane 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 plane 523 via the mounting posts 524. The flush lower surface 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.

[0097] It can be understood that the mounting column 524 is arranged on both sides of the pressing installation platform 522, so as to correspond to the fixing hole 411 arranged on the fixed end 41 of the pre-pressing piece 40. Therefore, during assembly, the mounting column 524 can be inserted into the fixing hole 411, so that the pre-pressing piece 40 can be fixed to the pressing installation platform 522. Specifically, during fixing, the mounting column 524 and the fixing hole 411 can be directly riveted and fixed, or the mounting column 524 and the fixing hole 411 can be fixed by using riveting after pre-fixing the fixed end 41 of the pre-pressing piece 40 and the surface of the pressing installation platform 522 by applying adhesive. Further, the stability of the pre-pressing piece 40 and the pressing block 50 during installation and use is enhanced, which is beneficial to maintaining the stability of the provided pre-pressing force.

[0098] It is worth mentioning that in this variant embodiment, the size of the pressing block 50 along the optical axis direction is greater than the size of the first support part 61 along the optical axis direction, and in the optical axis direction, the projection of the first support part 61 along the second direction is entirely located within the projection range of the pressing block 50 along the second direction, so that the multiple support balls 611 in the first support part 61 can be subjected to more uniform forces. Further, the size of the pressing block 50 along the optical axis direction is also greater than the size of the first guide groove 211 along the optical axis direction, and in the optical axis direction, the projection of the first guide groove 211 along the second direction is entirely located within the projection range of the pressing block 50 along the second direction, so that even if the position of the first support part 61 in the first guide groove 211 changes, in the optical axis direction, the projection of the first support part 61 along the second direction can still always be entirely located within the projection range of the pressing block 50 along the second direction. As mentioned above, the pressing block 50 can provide a deformation space for the pre-pressing piece 40, maintain the deformation of the pre-pressing piece 40, and also adjust the size of the pre-pressing force generated by the pre-pressing piece 40. Since the first support part 61, the pressing block 50, and the pre-pressing piece 40 are located on the same side relative to the optical axis, this makes the pre-pressing force more directly act on the first support part 61, and the adjustment of the pre-pressing force by the pressing block 50 can also directly act on the first support part 61. By locating the projection of the first support part 61 along the second direction entirely within the projection range of the pressing block 50 along the second direction, on the one hand, the pre-pressing piece 40 and the first support part 61 are closely matched in spatial position by the pressing block 50 to generate pre-pressing force and support force; on the other hand, the first support part 61 is always within the range of the pressing block 50 during driving, which reduces the risk of overturning of the movable part 20 and improves the stability of the driving device; on the other hand, the pre-pressing force adjusted by the pressing block 50 can be dispersed by the multiple support balls 611 of the first support part 61, so that the force acting on each support ball 611 is more uniform, and especially when falling or impact occurs, the multiple support balls 611 can disperse the impact force to reduce the risk of dents on the support balls 611. Further, the pressing block 50 can also protect the first support part 61 in its original position, avoiding the first support part 61 from being separated from the first guide groove 211 and affecting the reliability of the driving device.

[0099] In some embodiments, the pre-pressing piece 40 can be first installed on the pressing block 50, and then the pressing arm 52 is fixed to the first fixed side wall 11 of the fixed part 10 after the pressing block 50 is turned over, which further optimizes the assembly process of the pre-pressing piece 40 and the pressing block 50, increases the assembly efficiency, and reduces the assembly difficulty. It can be understood that in the assembly process, the piezoelectric actuator 30 and the pre-pressing piece 40 are first assembled as a semi-finished product, and then the piezoelectric actuator 30 is assembled with the pre-pressing piece 40 in the next step. If the pre-pressing piece 40 is directly assembled on the fixed part 10, the position of the friction head 32 of the piezoelectric actuator 30 and the movable part 20 needs to be aligned at all times during the assembly process, otherwise the friction contact position between the friction head 32 and the movable part 20 may be offset after the assembly is completed, thereby affecting the driving effect, and moreover, due to the characteristics of the pre-pressing piece 40, it is also difficult to adjust the pre-pressing piece 40 during the assembly process. Compared with the above-mentioned manner, the pre-pressing piece 40 is first installed on the pressing block 50, and then the pressing arm 52 is fixed to the fixed part 10 after the pressing block 50 is turned over, so that the position of the friction head 32 and the movable part 20 does not need to be aligned at all times during the assembly process of the pre-pressing piece 40, the assembly difficulty is reduced, and moreover, after the pre-pressing piece 40 is assembled on the pressing block 50, the position and assembly between the pressing block 50 and the fixed part 10 can be adjusted to adjust the pre-pressing piece 40, and the adjustability is higher.

[0100] As shown in Figures 8 to 9 In some embodiments, two first guide grooves 211 are spaced apart and arranged on the bottom surface of the first movable side wall 21 along the optical axis direction, and two second guide grooves 231 are spaced apart and arranged on the bottom surface of the second movable side wall 23 along the optical axis direction, and the distance between the farthest endpoints of the two first guide grooves 211 is greater than the distance between the farthest endpoints of the two second guide grooves 231.

[0101] Due to the pre-pressing force, the friction head 32 drives the friction part 22 on the first movable side wall 21, and by increasing the length of the first movable side wall 21 of the movable part 20 along the optical axis direction, the length of the friction part 22 arranged on the first movable side wall 21 along the optical axis direction is increased, thereby increasing the moving stroke of the movable part 20. Further, the piezoelectric actuator 30 and the first support part 61 are arranged on the first movable side wall 21, and since the piezoelectric actuator 30 and the pre-pressing piece 40 both extend along the optical axis direction, the corresponding first movable side wall 21 also needs to extend along the optical axis direction, in other words, the first movable side wall 21 has a certain length along the optical axis direction, and therefore there is more space on the bottom side of the first movable side wall 21 to arrange the first support part 61, and to further improve the balance of the structure, the distance between the first support parts 61 can be appropriately increased. Specifically, the first guide groove 211 and the second guide groove 231 can be circular, rectangular, hemispherical, U-shaped, V-shaped, pyramidal, etc.

[0102] In some embodiments, two first guide grooves 211 are formed on the bottom surface of the first movable side wall 21 in the optical axis direction, the first support part 61 is installed in the first guide groove 211 and the first guide rail 111, two second guide grooves 231 are formed on the bottom surface of the second movable side wall 23 in the optical axis direction, and the second support part 62 is installed in the second guide groove 231 and the second guide rail 131, which is conducive to improving the installation stability of the support part and optimizing the assembly process.

[0103] Further, since the support part structure is assembled inside the guide groove structure, as the distance between the two first guide grooves 211 increases, the distance between the two support parts of the first support part 61 assembled in the two first guide grooves 211 also increases, thereby increasing the support area formed by the connection of the first support part 61 and the second support part 62, thereby reducing the risk of tilting of the movable part 20 during movement.

[0104] In some embodiments, as shown in Figs. Figure 5 , Figure 6 and Figure 17 , in the second direction, the projection of the friction part 22 and the projection of the farthest point of the two first guide grooves 211 overlap each other, and the projection of the friction part 22 and the projection of the two support parts of the first support part 61 overlap each other, which is conducive to reducing the risk of tilting of the movable part 20 in the left-right direction and the front-back direction. Therefore, as the distance between the two support parts of the first support part 61 increases, a larger support area is provided for the movable part 20, and a stable support force is provided during the entire movement of the movable part 20, thereby reducing the possibility of tilting of the movable part 20 in the front-back direction. In other words, the length of the friction part 22 in the optical axis direction is less than the distance between the farthest points of the two first guide grooves 211 in the optical axis direction.

[0105] In some embodiments, the first support part 61 and the second support part 62 each include two balls for providing a smooth support force for the movable part 20. Further, each ball is arranged in a single guide groove, thereby avoiding interference between the two balls. It can be understood that the greater the distance between the two balls arranged in the optical axis direction of the first support part 61 and the second support part 62, the smoother the support force provided for the movable part 20, thereby further enhancing the stability and reliability of the optical lens 100. When the distance between the two balls provided by the first support part 61 is greater than the distance between the two balls provided by the second support part 62, the support area formed by the balls is increased, thereby increasing the stability of the optical lens 100.

[0106] In some embodiments, the projection of the friction head 32 of the piezoelectric actuator 30 in the second direction and the projection of the connection between the first support part 61 overlap each other in the second direction, which further reduces the tilting moment value and reduces the risk of tilting of the movable part 20.

[0107] In some embodiments, the number of the friction heads 32 of the piezoelectric actuator 30 is two, and the two friction heads 32 are arranged at intervals along the optical axis direction on the piezoelectric active part 31, wherein the distance between the two friction heads 32 of the piezoelectric actuator 30 is less than the distance between the two support parts of the first support part 61, which is conducive to reducing the deviation of the pressing force and the pre-pressing force, and further makes the pre-pressing force uniformly distributed on the two support parts of the first support part 61, reducing the wear and damage of the first support part 61 caused by uneven pre-pressing force. Further, when the piezoelectric active part 31 causes the friction head 32 to move by generating vibration deformation, the angle between the friction head 32 and the active part 20 abuts changes with the movement, which causes the force generated between the friction head 32 and the active part 20 not to be always parallel to the optical axis direction, and the direction of the force can have a certain inclination angle relative to the plane where the first active side wall 21 of the active part 20 is located. At this time, the active part 20 can further tilt due to the action of the inclined force. Therefore, the greater the distance between the two support parts of the first support part 61, the greater the support area that can be given to the active part 20, thereby reducing the overturning moment value and further reducing the risk of the active part 20 tilting.

[0108] In some embodiments, the imaginary line of the action direction of the pre-pressing force on the active part 20 intersects with the connecting line between the first support part 61, which is conducive to reducing the overturning moment value and further reducing the risk of the active part 20 tilting.

[0109] In some embodiments, the pressing block 50, the pre-pressing piece 40, the friction head 32 and the first support part 61 are together penetrated by an imaginary line parallel to the second direction, and the cross-sectional center of the pressing block 50, the position where the friction head 32 acts on the active part 20 and the cross-sectional center of the first support part 61 are aligned in the second direction, which is conducive to the pre-pressing force applied by the pre-pressing piece 40 stably and directly acting on the first support part 61, increasing the stability during the transmission of the pre-pressing force, thereby reducing the error phenomenon caused by the misalignment of the components and improving the reliability of the camera module. Moreover, the adjustment of the pre-pressing force of the pre-pressing piece 40 on the first support part 61 can also be more directly, improving the response speed of the driving device. Further, this alignment mode helps to reduce the local excessive wear of the first support part 61, prolonging the service life of the camera module while reducing the overturning moment value and further reducing the risk of the optical lens 100 tilting.

[0110] In some embodiments, the first support part 61 and the second support part 62 are independently formed parts of the movable part 20 and the pressing block 50. Further, the first support part 61 can be a multi-point structure, such as a ball or a sliding block, arranged along the optical axis direction. The second support part 62 can be a multi-point structure or a guide rail structure, such as a ball, a sliding block or a guide rod, arranged along the optical axis direction. When a guide rod is used as the support component, the good linearity can increase the stability and reliability of the movable part 20 when being driven to move, and further reduce the inclination or overturning of the optical lens 100. Specifically, the second guide groove 231 provided with the second support part 62 can be trapezoidal, rectangular or V-shaped.

[0111] It can be understood that when the first support part 61 is a ball and the second support part 62 is a guide rod, the downward pressure on the second support part 62 is mainly the magnetic force provided by the magnetic assembly 70, which is smaller than the downward pressure on the first support part 61, wherein the downward pressure on the first support part 61 includes the magnetic force provided by the magnetic assembly 70, the downward pressure provided by the pressing block 50 and the pre-pressing force provided by the pre-pressing part 40. In this way, the friction force generated by the surface contact of the second support part 62 can be reduced, and the power consumption of the piezoelectric actuator 30 can be further reduced. On the other hand, if the first support part 61 is a guide rod, the guide rod structure with a large friction coefficient will generate a large friction force due to the surface contact, which will affect the driving effect of the piezoelectric actuator 30. It can be understood that when a ball is used as the support part structure, the ball and the guide rail and the guide groove use point contact, which has the smallest rolling friction and the largest sliding friction, and is beneficial to the driving of the movable part 20.

[0112] In some embodiments, the first support part 61 and the second support part 62 are hemispherical structures fixed to the fixed part 10 and / or the movable part 20, or can be bosses, which use point contact friction, and are beneficial to reducing the wear of the guide groove or guide rail structure and prolonging the service life of the camera module.

[0113] In some embodiments, the first support part 61 and the first guide groove 211 are in two-point contact, such as Figure 7As shown, the first guide groove 211 is a V-shaped groove, and the two side walls of the first guide groove 211 are in contact with the two sides of the first support part 61 respectively, forming bidirectional constraint, which can limit the left and right movement of the first support part 61 perpendicular to the extension direction of the first guide groove 211, such as lateral deviation along the first direction, while allowing the first support part 61 to move along the extension direction of the first guide groove 211, ensuring the straightness of the movement trajectory of the first support part 61. Two-point contact has a larger contact area than single-point contact, which can disperse the load and reduce local stress concentration. When the first support part 61 is subjected to a lateral force, the two-side contact can jointly resist the overturning moment, improving the stability of the driving device, and the V-shaped groove has the "self-centering" feature: if the first support part 61 is offset by force, the constraint of the two side walls will force it to return to the center position of the first guide groove 211.

[0114] In some embodiments, the second support part 62 is in single-point contact with the second guide groove 231. According to the above description, the second support part 62 is loosely arranged in the second guide groove 231, the second guide groove 231 is a U-shaped groove, and the second support part 62 is in frictional contact with the bottom wall of the second guide groove 231, thereby realizing single-point contact, so that the movement space of the second support part 62 is larger, and movement jam caused by over-constraint is avoided. Second, single-point contact has lower requirements for processing precision, and does not need to be strictly aligned during assembly, such as size deviation of the second guide groove 231, position deviation of the second support part 62, etc. When there is a size tolerance between the second guide groove 231 and the second support part 62, loose fitting can reduce the assembly difficulty and avoid assembly stress caused by tight fitting. Finally, single-point contact can reduce friction loss, improve movement efficiency, reduce wear speed, and prolong the service life of the component.

[0115] In some embodiments, the first guide groove 211 is provided with two oppositely arranged side walls, and there is an included angle between the planes where the two side walls are located. The first support part 61 is in frictional contact with the two side walls of the first guide groove 211, so that the first support part 61 is tightly arranged in the first guide groove 211. The second guide groove 231 is provided with a bottom wall, and the second support part 62 is in frictional contact with the bottom wall of the second guide groove 231. That is, the first guide groove 211 ensures the precision of the reciprocating movement of the moving part 20 to form rigid constraint and prevent the moving part 20 from deviating, and the second guide groove 231 is suitable for fine adjustment to avoid movement jam caused by over-constraint, so that the moving part 20 moves more smoothly.

[0116] In some embodiments, the line connecting the first support part 61 and the second support part 62 intersects the plane where the side wall of the first guide groove 211 is located, and the line connecting the first support part 61 and the second support part 62 is parallel to the plane where the bottom wall of the second guide groove 231 is located. In other words, as shown in FIG. 6, the line connecting the first support part 61 and the second support part 62 is perpendicular to the plane where the side wall of the first guide groove 211 is located, and the line connecting the first support part 61 and the second support part 62 is parallel to the plane where the bottom wall of the second guide groove 231 is located. Figure 7As shown, the center points of the first support part 61 and the second support part 62 are on the same horizontal line, so that the active part 20 is lifted to the same height, the center line intersects the plane where the side walls of the first guide groove 211 are located to form an accurate movement guide. When the first support part 61 and the second support part 62 bear a load perpendicular to the center line, the reaction forces of the two side walls of the V-shaped groove can form a symmetric moment through the center line to offset the overturning effect of the external load and keep the structure balanced. The center line is parallel to the plane of the bottom wall of the U-shaped groove, and the second support part 62 can move back and forth along the extension direction of the bottom wall of the U-shaped groove. Since the second support part 62 is loosely arranged in the second guide groove 231, the second support part 62 can also be adjusted laterally along the bottom wall, thereby avoiding jamming caused by excessive constraint.

[0117] In some embodiments, as shown in Figures 8 to 10 , and Figure 15 , the driving device further includes a magnetic attraction assembly 70, which includes a first magnetic attraction piece 71 and a second magnetic attraction piece 72. The first magnetic attraction piece 71 is arranged on the main body of the fixed part 10, and the second magnetic attraction piece 72 is arranged on the bottom of the active part 20. The first magnetic attraction piece 71 and the second magnetic attraction piece 72 are oppositely arranged along the second direction and interact to generate a magnetic attraction force. Along the first direction, the distance from the second magnetic attraction piece 72 to the second support part 62 is less than the distance from the second magnetic attraction piece 72 to the first support part 61, and the direction of the magnetic attraction force is the same as that of the pre-pressing force. Specifically, the second magnetic attraction piece 72 is arranged on the second active side wall 23 of the active part 20, and the first magnetic attraction piece 71 is arranged on the second fixed side wall 13 of the fixed part 10. The first magnetic attraction piece 71 and the second magnetic attraction piece 72 are oppositely arranged along the second direction and interact to generate a magnetic attraction force. Since the direction of the magnetic attraction force is the same as that of the pre-pressing force, the pre-pressing force and the magnetic attraction force are superimposed on each other, and in the case where the magnetic attraction force is insufficient to resist the external force, the pre-pressing force can provide additional support. Further, since the magnetic attraction assembly 70 is arranged on the bottom of the active part 20 and the piezoelectric actuator 30 is arranged on the top of the active part 20, the support part can be arranged only on the bottom of the active part 20 to support the active part 20, thereby further reducing the number of support parts that need to be arranged in the camera module.

[0118] It can be understood that, since the magnetic attraction assembly 70 is arranged at the bottom of the movable part 20, the first movable side wall 21 is subjected to the pre-pressing force, and the movable part 20 has a tendency to overturn, and thus the magnetic attraction force needs to be arranged to reduce the risk of the movable part 20 overturning. The magnetic attraction force and the pre-pressing force are parallel to each other and in the same direction, and the action points of the magnetic attraction force and the pre-pressing force on the movable part 20 are located on the two sides of the optical axis, which is beneficial to making the movable part 20 tightly contact the fixed part 10 and enhancing the stability of the camera module, and on the other hand, the magnetic attraction force and the pre-pressing force cooperate with each other to further balance the force of the movable part 20, which helps to reduce the optical lens 100 tilting phenomenon caused by the unbalanced moment.

[0119] In some embodiments, the second magnetic attraction member 72 is arranged in the middle region between the two second guide grooves 231 along the optical axis direction, so as to reduce the overturning moment value and further reduce the risk of the movable part 20 tilting.

[0120] In some embodiments, as shown in Figure 10 The first magnetic attraction member 71 is a metal yoke, and the first magnetic attraction member 71 includes a base body part 711 and a supporting part 712, at least a part of the base body part 711 is projected on the second direction and overlaps the second magnetic attraction member 72 projected on the second direction, and at least a part of the supporting part 712 is projected on the second direction and overlaps the second supporting part 62 projected on the second direction. By arranging the first magnetic attraction member 71, on the one hand, the magnetic attraction force is enhanced, and the pre-pressing force is better balanced, and the risk of the movable part 20 overturning is reduced; on the other hand, the supporting part is stably clamped between the movable part 20 and the fixed part 10 by the magnetic attraction force, the stability of the supporting part is improved, and the imaging quality of the camera module is improved.

[0121] In some embodiments, the base body part 711 and the supporting part 712 of the first magnetic attraction member 71 are integrally connected, which improves the processing convenience and increases the processing efficiency. Further, the base body part 711 and the supporting part 712 can be a structure arranged in a split manner, which helps to improve the flatness of the base body part 711, but when the area of the base body part 711 is too large, the deformation phenomenon is easy to occur.

[0122] In some embodiments, the supporting part 712 can be V-shaped or planar according to the shape of the first guide rail 111 and the second guide rail 131, and is arranged on the lower side of the first supporting part 61 and / or the second supporting part 62 along the second direction, so as to avoid the first supporting part 61 and the second supporting part 62 from being concave, and further improve the quality and service life of the camera module.

[0123] In some embodiments, the piezoelectric actuator 30 further includes a conductive member 33 arranged between the movable part 20 and the friction head 32, as shown in Figure 3As shown, the conductive piece 33 includes a first connecting part 331, a second connecting part 333, and a conductive part 334. The first connecting part 331 is a horizontal plate body arranged between the piezoelectric actuator 30 and the pre-pressing piece 40 along the second direction, and the second connecting part 333 is a vertical plate body integrally bent from the first connecting part 331 along the second direction. The conductive part 334 extends along the optical axis direction from the outer peripheral wall of the fixed part 10 and is connected to the conductive piece 14 arranged on the fixed part 10. By arranging the conductive piece 33, the space utilization inside the camera module can be increased and electrical conduction can be achieved.

[0124] In some embodiments, the friction head 32 in the piezoelectric actuator 30 can be directly in contact with 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 that needs to be overcome to drive the movable part 20.

[0125] Reference Figure 1 With Figure 4 As shown, in some embodiments, the circuit components in the camera module include, in addition to the flexible circuit board, a conductive piece 14 arranged around the outer peripheral wall of the fixed part 10. Specifically, the conductive piece 14 is embedded in or attached to the first fixed side wall 11 and the second fixed side wall 13, at least part of the conductive piece 14 is exposed to the outer peripheral side of the fixed part 10, and the conductive piece 14 is provided with a conductive part 141. The conductive piece 14 is welded to the conductive part 334 through the conductive part 141 and is electrically conductive. The conductive piece 14 can also be used to achieve electrical conduction of the circuit part of the light sensing component 80, the light turning element 90, and other circuit modules in a simple electrical connection manner. As shown, Figure 2 The conductive piece 14 with a bent structure is easy to connect and can adapt to complex space layout and shape requirements, further enabling efficient wiring design in a narrow or irregular space, thereby improving space utilization.

[0126] Further, one of the first magnetic attraction piece 71 and the second magnetic attraction piece 72 is a magnet, and the other is a magnet or a magnetic yoke suitable for being attracted to the magnet. The magnet or the magnetic yoke can be fixed by adhesion, insert 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 the pre-pressing force and the magnetic attraction force, and the direction of the magnetic attraction force is the same as that of the pre-pressing force, the risk of tilting of the movable part 20 is reduced. Specifically, the pre-pressing force can be greater than the magnetic attraction force. When the magnetic attraction force is too large, the frictional resistance that needs to be overcome by the movable part 20 during driving movement will also be larger, further increasing the power consumption of the piezoelectric actuator 30, which is not conducive to driving the movable part 20.

[0127] In some embodiments, the first magnetic member 71 is a magnet, and the second magnetic member 72 is an insert-molded yoke, which can also serve as the conducting member 14 to simplify the structure. Specifically, the yoke is designed in a metal strip, which is cut and shaped after manufacturing. This batch manufacturing method can further improve the production efficiency. Further, the yoke used in the present application has a large planar area. Increasing the metal pressing area during manufacturing can increase the planar regularity. Further, the yoke can be made of a material that is attracted to the magnet, such as metal, to further enhance the magnetic attraction and improve the stability of the optical lens 100.

[0128] 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 on the movable part 20 and the second magnetic member 72 on the fixed part 10 interact with each other and generate a magnetic attraction force. Therefore, when the movable part 20 is driven along the optical axis, the magnetic attraction force generated by the magnetic assembly 70 can ensure that the movable part 20 is always supported by the supporting part during the long travel of the movable part 20, and the movable part 20 will not tilt to a large extent. Further, the magnetic attraction force generated by the magnetic assembly 70 on the second movable side wall 23 is in the same direction as the pre-pressing force generated by the pre-pressing member 40 on the first movable side wall 21, which is beneficial to improve the fit between the movable part 20 and the fixed part 10, further reduce the tilting of the movable part 20 due to unbalanced torque, and further reduce the risk of tilting of the optical lens 100.

[0129] In some embodiments, as Figures 2 to 6 As known from the foregoing, the piezoelectric actuator 30 further includes a piezoelectric active part 31, a friction head 32, a conductive member 33, and a buffer member 34. The piezoelectric actuator 30 is in abutment with the movable part 20 under the action of the pre-pressing force. Specifically, the piezoelectric active part 31 is provided with a friction head 32 on the side facing the first movable side wall 21. The piezoelectric active part 31 generates mechanical resonance motion through the inverse piezoelectric effect. When the frequency of the applied voltage is consistent with the natural frequency of the piezoelectric active part 31, resonance occurs and ultrasonic waves are generated. Therefore, a deflection reciprocating motion or an elliptical motion can be achieved on a specifically configured electrode layer, so as to drive the friction head 32 to perform a deflection reciprocating motion or an elliptical motion, and then drive the movable part 20 to slide relative to the fixed part 10 through the friction between the friction head 32 and the first movable side wall 21.

[0130] Reference is made to Figure 2 With Figure 3It can be seen that in some embodiments, the piezoelectric actuator 30 further comprises a buffer member 34 arranged between the pre-pressing member 40 and the piezoelectric active part 31. Since the elastic modulus of the buffer member 34 is lower than that of the pre-pressing member 40, the buffer member 34 is more likely to deform than the pre-pressing member 40, so that it can adaptively produce different degrees of shrinkage deformation according to different tolerances in different piezoelectric actuators 30, thereby reducing the difference in pre-pressing force of piezoelectric actuators 30 with different tolerances. In other words, the deformable buffer member 34 can offset at least part of the pre-pressing force changes caused by material tolerances and assembly tolerances, and can also absorb part of the deformation of the piezoelectric active part 31. The buffer member 34 can also absorb part of the vibration deformation of the piezoelectric active part 31 to stably maintain the parallelism of the piezoelectric active part 31 relative to the first movable side wall 21, and further protect the piezoelectric actuator 30 from excessive mechanical stress.

[0131] It can be understood that the buffer member 34 can be an adhesive tape, one side of which is flatly bonded to the pre-pressing member 40, and the opposite side is bonded to the piezoelectric active part 31 or the components below the piezoelectric active part 31. The adhesive tape is easy to install and use, does not need to be cured, has good flatness, and is beneficial to maintaining the parallelism of the piezoelectric active part 31 relative to the first movable side wall 21. The size of the buffer member 34 can be smaller than, equal to, or greater than the size of the piezoelectric active part 31, so that the buffer member 34 fills the space between the piezoelectric active part 31 and the pre-pressing member 40. Similarly, the specific shape and number of the buffer member 34 are not limited in the present application. For example, two pieces of adhesive tape can be used as a buffer member 34, or two pieces of adhesive tape can be arranged at intervals along the second direction. Preferably, the size of the buffer member 34 is greater than the size of the piezoelectric active part 31, so that the area between the piezoelectric active part 31 and the pre-pressing member 40 is completely filled by the buffer member 34, which is beneficial to ensuring the structural strength of the pre-pressing member 40 and enhancing the installation parallelism of the piezoelectric active part 31.

[0132] Specifically, the buffer member 34 can also be a low-modulus adhesive applied to the surface of the piezoelectric active part 31. That is, since the buffer member 34 can be attached between the pre-pressing member 40 and the circuit substrate, it not only has the advantage of facilitating assembly, but also avoids the problem of affecting the vibration mode of the piezoelectric active part 31 after using UV adhesive or heat-cured adhesive to bond the pre-pressing member 40.

[0133] As Figure 2 With Figure 3It can be seen that in some embodiments, the piezoelectric active part 31 is a substrate utilizing the inverse piezoelectric effect, which shrinks or expands according to the change of the polarization direction and the electric field direction. This effect means that when an electric field is applied in the polarization direction of the dielectric, the dielectric will produce a mechanical deformation phenomenon, which enables the piezoelectric active part 31 to be polarized by applying an electric field in single crystal, polycrystalline ceramic, polymer and other materials, thereby generating ultrasonic oscillation. This oscillation can produce a pendulum reciprocating motion or an elliptical motion on a specially arranged electrode layer, thereby driving the friction head 32 to move correspondingly. It can be understood that the friction 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, so the driving force is actually the friction between the friction head 32 and the movable part 20.

[0134] In a specific embodiment of the present application, the piezoelectric active part 31 adopts a multi-layer stacked structure. Specifically, the piezoelectric active part 31 is stacked alternately by ceramic layers and electrode layers in the thickness direction, in the order of ceramic layer, electrode layer, ceramic layer, electrode layer… ceramic layer, electrode layer, ceramic layer. Each electrode layer is located between two adjacent ceramic layers. When an electric field is applied between adjacent electrode layers, the ceramic layer will produce elongation or contraction deformation. By arranging multiple electrode layers, the voltage required to drive the piezoelectric active part 31 to bend can be reduced. The number of electrode layers and ceramic layers can be selected according to specific needs, in other words, for example, the number of ceramic layers can be greater than or equal to the number of electrode layers. The ceramic layer is usually made of a material with a piezoelectric effect, such as PZT piezoelectric ceramic; and the electrode layer is made of a conductive material, such as copper, gold, silver or silver alloy, etc. The fixation between the multi-layer ceramic layer and the multi-layer electrode layer can be achieved by ceramic co-firing process, that is, a layer of ceramic slurry is laid, then a layer of electrode slurry is laid, and then they are heated and sintered together to form a laminated piezoelectric active part 31. In addition, by providing power to the multi-layer electrode layer, the multi-layer ceramic layer arranged between the multi-layer electrode layer can be polarized.

[0135] It can be understood that the side electrical connection parts in the camera module are respectively connected to the positive voltage and the negative voltage of the power supply, thereby respectively providing at least one electrode layer with positive voltage and at least one electrode layer with negative voltage, thereby polarizing the multi-layer ceramic layer, and the piezoelectric ceramic after polarization will automatically arrange into a piezoelectric direction, further producing a piezoelectric effect.

[0136] In some embodiments, in order to improve the driving performance of the piezoelectric actuator 30, the piezoelectric active part 31 can be made of piezoelectric ceramic material or piezoelectric single crystal material, and can be a single-layer ceramic body or a multi-layer ceramic body, or a single-layer single crystal or a multi-layer single crystal, such as lead zirconate titanate (PZT) based piezoelectric ceramic, potassium sodium niobate (KNN) based piezoelectric ceramic, barium titanate (BT) based piezoelectric ceramic, lead magnesium niobate-lead indium niobate (PMN-PT) based piezoelectric single crystal, etc.

[0137] In some embodiments, the piezoelectric active part 31 is rectangular in shape along the optical axis direction, and the friction heads 32 are provided on one side of the piezoelectric active part 31 along the second direction towards the movable part 20. Specifically, the number of friction heads 32 is two, and the two friction heads 32 are spaced apart along the optical axis direction. It can be understood that the piezoelectric actuator 30 drives the movable part 20 to move along the optical axis direction. Compared with driving the movable part 20 by only providing a single friction head 32, providing two friction heads 32 to cooperate with each other to drive the movable part 20 to move a long stroke is more effective.

[0138] In some embodiments, the friction heads 32 are made of wear-resistant materials, such as various high-hardness wear-resistant ceramic materials, such as alumina, zirconia, silicon carbide ceramic, or high-wear-resistant metal materials, carbon fiber materials, or composite materials of ceramic, metal particles and high polymer, etc. The use of wear-resistant materials can improve the wear resistance of the friction heads 32, increase the friction force between the movable part 20 and the friction heads 32, further enhance the driving force provided by the piezoelectric actuator 30, and prolong the service life of the friction heads 32 due to good wear resistance. In addition, in some embodiments, the friction heads 32 and the piezoelectric active part 31 can be an integral structure or a detachable structure. The friction heads 32 and the piezoelectric active part 31 can be fixed on the piezoelectric active part 31 by bonding, clamping, nesting, welding or fastener connection, etc. to ensure that the connection strength is guaranteed by surface contact between the two, and at the same time the friction heads 32 can move obviously with the deformation of the piezoelectric active part 31.

[0139] In some embodiments, the piezoelectric active part 31 bends and vibrates along the second direction in a mode of one wave crest and one wave trough. Since the position of the friction head 32 can be matched with the mode of the piezoelectric active part 31, the friction head 32 can be provided at the position of the wave crest and the wave 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 platform, a cylinder, a semi-cylinder, etc. The number of friction heads 32 can be one, two or more. In this application, the shape of the friction head 32, the number of friction heads 32, the shape of the piezoelectric active part 31, the electrode arrangement mode, and the connection mode between the friction head 32 and the piezoelectric active part 31 are not specifically limited.

[0140] In some embodiments, the driving device further comprises a driving control assembly for sensing and controlling the moving position of the movable part 20. The driving control assembly is arranged on the side of the movable part 20 to reasonably utilize the space of the camera module and increase the compactness of the structure. Further, the driving control assembly can comprise a Hall element, an integrated circuit driver (driver IC), a tunneling magnetoresistance (TMR), etc.

[0141] In some embodiments of the present application, as shown in Figure 1 The camera module further comprises an optical system, which is assembled inside the fixed part 10 since the fixed part 10 is a frame. The optical system comprises, in sequence along the optical axis, a light turning element 90, an optical lens 100 and a photosensitive assembly 80. The optical lens 100 is arranged on the light turning path of the light turning element 90, and the photosensitive assembly 80 is used to receive the light transmitted from the optical lens 100 and perform imaging. Specifically, the light output direction of the light turning element 90, the axial direction of the optical lens 100 and the normal direction of the photosensitive assembly 80 are arranged along the optical axis. The light turning element 90 is located on the side close to the light incidence inside the fixed part 10, the optical lens 100 is located in the central region inside the fixed part 10, and the photosensitive assembly 80 is located on the side far from the light incidence inside the fixed part 10. The camera module provided by the present application has the characteristics of easy assembly and good consistency of pre-pressure in the camera module.

[0142] In some embodiments of the present application, the light turning element 90 has an incident surface and an exit surface, the incident surface and the exit surface intersect, and the propagation direction of the light is changed by the light turning element 90 to fold the optical path. The optical lens 100 penetrates along the optical axis and has a lens mounting hole, and at least one optical lens is arranged in the lens mounting hole along the optical axis, so as to realize the converging effect of the optical lens 100 on the light. After receiving the converging light, the photosensitive assembly 80 converts the received optical signal into an electrical signal for imaging processing.

[0143] 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 direction to realize the optical focusing and optical zooming functions. Of course, in this example, both of the two optical lenses 100 can also be driven and moved along the optical axis direction to realize the optical focusing and optical zooming 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 and moved along the optical axis direction to realize the optical focusing and optical zooming 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 and moved along the optical axis direction to realize the optical focusing and optical zooming 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 by the present application.

[0144] In some embodiments, the light sensing assembly 80 further includes a chip circuit board, a light sensing chip, a light filtering element, and a light filtering element support. The light sensing chip is arranged on and connected to the chip circuit board. The light filtering element support is located on the side of the light sensing chip and is arranged on the chip circuit board. The light filtering element support and the chip circuit board are selected to be integrally formed or to be a split structure. The light filtering element is mounted on the light filtering element support to maintain the light sensing path of the light sensing chip and to filter the imaging light entering the light sensing chip.

[0145] The present application can also provide a camera module, which includes:

[0146] The driving device as above;

[0147] The light turning element 90 for turning the incident light;

[0148] The optical lens 100, which is maintained on the light turning path of the light turning element 90;

[0149] The light sensing assembly 80 for receiving the light from the optical lens 100.

[0150] The present application can also provide an assembly method of a camera module, as shown in Figures 11 to 14 The assembly method includes:

[0151] S1, providing a fixed part 10;

[0152] S2, providing a movable part 20, mounting the movable part 20 in the fixed part 10, and the movable part 20 is used to carry the optical lens 100, and the optical lens 100 defines an optical axis;

[0153] S3, providing a piezoelectric actuator 30, a pre-pressing piece 40 and a pressing block 50, assembling the piezoelectric actuator 30, the pre-pressing piece 40 and the pressing block 50 to form a pre-pressing driving assembly, wherein the pre-pressing piece 40 is arranged between the piezoelectric actuator 30 and the pressing block 50, the piezoelectric actuator 30 is mounted on the pre-pressing piece 40, and the pressing block 50 is coupled with the pre-pressing piece 40 and provides a deformable preset space for the pre-pressing piece 40.

[0154] S4, mounting the pre-pressing driving assembly on the fixed part 10 in a direction perpendicular to the optical axis and on the top of the movable part 20, wherein the pressing block 50 is fixed on the fixed part 10, the pre-pressing piece 40 applies a pre-pressing force to the piezoelectric actuator 30 in a direction perpendicular to the optical axis (i.e. the second direction), the piezoelectric actuator 30 and the movable part 20 are abutted under the action of the pre-pressing force, and the piezoelectric actuator 30 is in frictional contact with the movable part 20.

[0155] By arranging the piezoelectric actuator 30 on the top of the movable part 20, the support part structure can only be arranged at the bottom of the movable part 20 for supporting, without the need to additionally arrange the support part structure on the top or side of the movable part 20, thereby reducing the number of support part structures and enhancing the assembly consistency and assembly precision. Further, since the assembly is performed from bottom to top, the assembly process is further simplified and the assembly tolerance is reduced.

[0156] In some embodiments, an assembly method of the camera module, step S1 further comprises the following step:

[0157] S11, providing a fixed part 10 and a first magnetic attraction piece 71, the first magnetic attraction piece 71 being arranged on the fixed part 10.

[0158] In some embodiments, an assembly method of the camera module, step S2 further comprises the following step:

[0159] S21, providing a second magnetic attraction piece 72, the second magnetic attraction piece 72 being arranged on the movable part 20;

[0160] S22, providing a first support part 61 and a second support part 62, assembling the first support part 61 on the first guide rail 111 and assembling the second support part 62 on the second guide rail 131, the second magnetic attraction piece 72 and the first magnetic attraction piece 71 being oppositely arranged in the second direction and interacting to generate a magnetic attraction force, the magnetic attraction force clamping the first support part 61 and the second support part 62 between the movable part 20 and the fixed part 10.

[0161] In some embodiments, an assembly method of the camera module, step S3 further comprises the following step:

[0162] S31, first fix the pre-pressing piece 40 and the piezoelectric actuator 30, and then couple the pre-pressing piece 40 to the pressing block 50 to form the pre-pressing driving assembly. In this way, the pre-pressing piece 40 can be assembled with the piezoelectric actuator 30 to the pressing block 50, which reduces the difficulty of assembly.

[0163] Specifically, in step S31, the pre-pressing piece 40 includes two fixed ends 41, an elastic part 42, and two bending parts 43, the two bending parts 43 are respectively arranged between the two fixed ends 41 and the elastic part 42 and respectively connect the elastic part 42 and the two fixed ends 41, the pre-pressing 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-pressing piece 40 by being fixed to the elastic part 42.

[0164] It is worth mentioning that in other embodiments of the present application, the pre-pressing piece 40 and the pressing block 50 can also be fixed first in step S3. Specifically, step S3 includes:

[0165] S31b, first couple the pre-pressing piece 40 to the pressing block 50, and then install the piezoelectric actuator 30 on the pre-pressing piece 40 to form the pre-pressing driving assembly.

[0166] Further, in some embodiments, step S4 further includes the step of:

[0167] S41, install the lower pressing arm 52 of the pressing block 50 to the fixed part 10, and the friction head 32 of the piezoelectric actuator 30 is directed to abut against the first movable side wall 21 of the movable part 20, the first movable side wall 21 is clamped between the friction head 32 of the piezoelectric actuator 30 and the first supporting part 61 by the pressing block 50, and the first supporting part 61 provides a supporting force in the second direction for the movable part 20;

[0168] S42, the pre-pressing piece 40 is deformed under the action of the pressing block 50 and the first supporting part 61 to provide a pre-pressing force which is opposite to the supporting force and in the same direction as the lower pressing force.

[0169] Specifically, in step S41, the pressing block 50 is installed in the first accommodating groove 112 of the fixed part 10.

[0170] Further, after assembling the piezoelectric actuator 30, the pre-pressing piece 40 and the pressing block 50, the pressing block 50 is assembled to the fixed part 10 to complete the assembly process, which can simplify the entire assembly process and further reduce the problems of inclination of the movable part 20 and poor consistency of the camera module assembly caused by assembly errors.

[0171] It should be understood that the above assembly method can also be applied to Figures 15 to 17In the shown variant, the pre-stressing element 40 further comprises an intermediate connection 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 connection 44.

[0172] The foregoing describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of 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 bottom of the first movable side wall has a first guide groove, and the bottom of the second movable side wall has a second guide groove; 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 guide groove, wherein the pre-pressing force direction intersects with the plane where the inner surface of the first guide groove lies; a magnetic attraction component, close to the second guide slot and applying a magnetic attraction force perpendicular to the optical axis to the second guide slot, wherein the direction of the magnetic attraction force is perpendicular to the plane where the inner surface of the second guide slot is located; A first support part and a second support part, the first support part includes at least two support balls, the second support part includes at least one support ball, the at least two support balls of the first support part are arranged in the first guide groove as the main guide part, and the at least one support ball of the second support part is arranged in the second guide groove as the auxiliary support part.

2. The driving device according to claim 1, wherein The projection of the pre-pressed part along the second direction, the projection of the piezoelectric actuator along the second direction and the projection of the first support portion along the second direction overlap, the projection of the second support portion along the second direction and the projection of the magnetic attraction component along the second direction do not overlap, and the second direction is perpendicular to the optical axis direction.

3. The driving device according to claim 1, wherein: The driving device further includes a pressure block fixed to the fixed part, the pressure block, the pre-pressed part and the piezoelectric actuator are located in sequence on the top of the first movable side wall along the second direction, the projection of the first supporting part along the second direction is all located within the projection range of the pressure block along the second direction, and the second direction is perpendicular to the optical axis direction.

4. The driving device according to claim 3, wherein: The piezoelectric actuator includes a piezoelectric active part and a friction head that are connected to each other. Under the action of the pre-pressing member, the friction head always maintains friction contact with the top of the movable part, wherein the pressure block, the pre-pressing member, the friction head and the first support part are passed through by an imaginary line parallel to the second direction, and the cross-sectional center of the pressure block, the position where the friction head acts on the movable part and the cross-sectional center of the first support part are aligned in the second direction.

5. The driving device according to claim 1, wherein: The magnetic attraction force and the pre-pressure force are parallel to each other and have the same direction, and the pre-pressure force is greater than the magnetic attraction force.

6. The driving device according to claim 2, wherein: The first support part includes at least two support balls and at least one small ball located therebetween. The at least two support balls and at least one small ball of the first support part are both arranged in the first guide groove. The pre-pressure acts on the line connecting the at least two support balls of the first support part, and the magnetic force acts on a position close to the second support part.

7. The driving device according to claim 6, characterized in that The first supporting portion is in two-point contact with the first guide groove, and the second supporting portion is in single-point contact with the second guide groove.

8. The driving device according to claim 7, wherein: The first guide groove is provided with two oppositely arranged side walls, and there is an angle between the planes on which the two side walls are located. The first support portion is in frictional contact with the two side walls of the first guide groove, so that the first support portion is tightly arranged in the first guide groove. The second guide groove is provided with a bottom wall, and the second support portion is in frictional contact with the bottom wall of the second guide groove, so that the second support portion is loosely arranged in the second guide groove.

9. The driving device according to claim 8, wherein: A line connecting the first supporting portion and the second supporting portion intersects with a plane where the side wall of the first guide groove is located, and a line connecting the first supporting portion and the second supporting portion is parallel to a plane where the bottom wall of the second guide groove is located.

10. The driving device according to claim 1, wherein: The magnetic attraction assembly includes: a first magnetic attraction member and a second magnetic attraction member, the first magnetic attraction member is arranged on the fixed part, the second magnetic attraction member is arranged on the movable part, and the second magnetic attraction member is arranged between the first support part and the second support part and close to the second support part, the first magnetic attraction member and the second magnetic attraction member are arranged relative to each other along the second direction and interact with each other to generate magnetic attraction force, along the first direction, the distance from the second magnetic attraction member to the second support part is smaller than the distance from the second magnetic attraction member to the first support part.

11. The driving device according to claim 10, wherein: The first magnetic member is a metal magnetic yoke, and the first magnetic member includes a base portion and a supporting portion. The projection of at least a portion of the base portion along the second direction overlaps with the projection of the second magnetic member along the second direction, and the projection of at least a portion of the supporting portion along the second direction overlaps with the projection of the second supporting portion along the second direction.

12. A camera module, characterized in that: include: The driving device according to 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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