Driving device and camera module thereof

Abstract

The invention discloses a driving device and a camera module thereof, and belongs to the field of camera modules. The driving device comprises a movable part, and the movable part comprises a first movable side wall; the fixed part comprises a first fixed side wall, and the first movable side wall is opposite to the first fixed side wall in the first direction; the position sensing assembly comprises a position sensing element and a position sensing magnet which are oppositely arranged in the first direction; a piezoelectric actuator; the conductive part is arranged at the top of the piezoelectric actuator and electrically connected with the piezoelectric actuator, and the conductive part is bent to the first fixed side wall from the top of the piezoelectric actuator; the flexible circuit board is arranged on the first fixed side wall, and at least one part of the position sensing element and at least one part of the conductive part are located on the two sides of the flexible circuit board respectively and electrically connected with the flexible circuit board. The driving device and the camera module provided by the invention have the advantages of being convenient to assemble, simplifying the wiring of the pre-pressing driving side and compressing the assembly tolerance of the side.

Description

Technical Field

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

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

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

[0004] Existing periscope camera modules use a top-mounted piezoelectric motor, which provides greater driving force while reducing overall size, meeting the driving requirements of periscope camera modules at long focal lengths. Because the piezoelectric motor is located on the top side of the movable carrier, the assembly accuracy of the movable carrier's driving surface and the piezoelectric motor directly affects the movable carrier's performance after being driven. Summary of the Invention

[0005] One object of the present application is to provide a driving device and a camera module thereof, which simplify the conductive routing by arranging the position sensing element and the conductive member on both sides of the flexible circuit board and electrically connecting the flexible circuit board, thereby avoiding interference of the conductive member with the conductive connection between the position sensing component and the flexible circuit board, thereby solving or at least partially alleviating the circuit conductive connection problem of the piezoelectric actuator and the position sensing element in the driving device.

[0006] Another object of the present application is to provide a driving device and a camera module thereof, which effectively improve the compactness of the mounting structure on the first fixed side wall by arranging the position sensing element inside the first fixed side wall and electrically connecting it to the flexible circuit board, and arranging at least a portion of the conductive member outside the flexible circuit board to electrically connect it to the conductive member of the flexible circuit board, thereby avoiding increasing the assembly gap between the fixed part and the movable part, and facilitating improving the accuracy of position sensing.

[0007] Another object of the present application is to provide a driving device and a camera module thereof, which reduces the difficulty of welding by arranging the welding point between the conductive part and the flexible circuit board at the bottom, while reducing the number of bending times of the conductive part and reducing the possibility of breakage.

[0008] Another object of the present application is to provide a driving device and a camera module thereof, wherein the pre-pressed part includes a pre-pressed part main body and a pre-pressed part deformation body, the distance between the top surface of the main body of the conductive part and the bottom surface of the pre-pressed part main body is H1, and the distance between the top surface of the extension area and the bottom surface of the deformation body of the pre-pressed part is H2, and H1 is not greater than H2, so as to avoid interference between the deformation of the conductive part and the deformation of the deformation part when the piezoelectric actuator is working, thereby affecting the driving effect of the driving device.

[0009] To achieve the above objectives, the technical solution adopted in this application is a driving device for a periscope camera module, comprising: The movable portion is used to carry the optical lens, wherein the optical lens defines an optical axis, and the movable portion includes a first movable side wall; a fixed portion, wherein the movable portion is movably disposed in the fixed portion, the fixed portion comprising a first fixed side wall, the first movable side wall being opposite to the first fixed side wall along a first direction perpendicular to the optical axis; A position sensing assembly, comprising a position sensing element and a position sensing magnet disposed opposite to each other along a first direction, wherein the position sensing magnet is disposed on the first movable side wall; 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 conductive member disposed on the top of the piezoelectric actuator and electrically connected to the piezoelectric actuator, wherein the conductive member is bent from the top of the piezoelectric actuator to the first fixed side wall; A flexible circuit board is disposed on the first fixed side wall. The position sensing element and at least a portion of the conductive member are respectively located on both sides of the flexible circuit board and are electrically connected to the flexible circuit board.

[0010] Preferably, the flexible circuit board includes an inner side and an outer side opposite to each other along a first direction, the first fixed side wall has a mounting groove, the position sensing element is arranged in the mounting groove to electrically connect to the inner side of the flexible circuit board, and the conductive member is bent to the outer side of the flexible circuit board to electrically connect to the flexible circuit board.

[0011] Preferably, the flexible circuit board includes a top close to the piezoelectric actuator and a bottom away from the piezoelectric actuator, and the conductive member is bent from the top of the piezoelectric actuator and extends to the bottom of the flexible circuit board to achieve conduction at the bottom of the flexible circuit board.

[0012] As a preference, the conductive part includes a main body, an extension and a welding part, the main body is located at the top of the piezoelectric actuator, the extension is bent along the second direction from the plane where the main body is located, the welding part is connected to the extension and is electrically connected to the bottom of the flexible circuit board, the plane where the main body is located is perpendicular to the plane where the flexible circuit board is located, and the plane where the extension is located is parallel to the plane where the flexible circuit board is located; wherein the second direction is perpendicular to the optical axis direction and the first direction.

[0013] Preferably, the piezoelectric actuator includes a piezoelectric active part and a friction head connected to each other, and the friction head is in friction contact with the top of the first movable side wall; the main body is located on the top of the piezoelectric active part, and the extension part extends from both ends of the main body along the optical axis direction and then bends along the second direction.

[0014] Preferably, the extension portion includes an extension area and an extension leg, the extension area extends from both ends of the main body along the optical axis direction, and then bends along the second direction to connect to the extension leg, the extension leg is connected to the welding portion at the bottom along the second direction, and the main body, the extension area, the extension leg and the welding portion form an opening.

[0015] As a preferred embodiment, a pre-pressed part is further included, which is arranged on the top of the piezoelectric actuator and applies a pre-pressure perpendicular to the optical axis direction to the movable part; the pre-pressed part includes a pre-pressed part main body and a pre-pressed part deformation body, and the pre-pressed part deformation body extends from both ends of the pre-pressed part main body along the optical axis direction; along the second direction, the distance from the top surface of the main body of the conductive part to the bottom surface of the pre-pressed part main body is H1, and the distance from the top surface of the extended part of the conductive part to the bottom surface of the pre-pressed part deformation body is H2, and H1≤H2.

[0016] As a preference, there is a height difference between the plane where the extension portion is located and the plane where the main body portion is located, and the extension portion is connected to the main body portion via an inclined connecting portion.

[0017] As a preference, a mounting portion is provided between the pre-pressed component body and the main body portion of the conductive component to increase the distance H1 from the top surface of the main body portion to the bottom surface of the pre-pressed component body.

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

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction to the drawings of the embodiments will be given below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not intended to limit the present application.

[0020] Figure 1 This is a structural diagram of the camera module in some embodiments of the present application.

[0021] Figure 2 This is a schematic diagram of the explosion structure of the camera module in some embodiments of the present application.

[0022] Figure 3 This is a schematic diagram of the exploded structure of the driving device in some embodiments of the present application.

[0023] Figure 4 Schematic diagram of the explosion structure of the camera module in other embodiments of the present application.

[0024] Figure 5 Schematic diagram of the cross-sectional structure of the driving device in the optical axis direction and the second direction in some embodiments of the present application.

[0025] Figure 6 Schematic diagram of the cross-sectional structure of the driving device in the optical axis direction and the second direction in other embodiments of the present application.

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the camera module in the first direction and the second direction in some embodiments of the present application.

[0027] Figure 8 This is a bottom-up schematic diagram of the camera module structure in some embodiments of the present application.

[0028] Figure 9 This is a bottom-up schematic diagram of the camera module structure in other embodiments of the present application.

[0029] Figure 10 This is a bottom-up schematic diagram of the camera module structure in some other embodiments of the present application.

[0030] Figure 11 Schematic diagram of the explosion structure of the driving device in other embodiments of the present application.

[0031] Figure 12 for Figure 11 Schematic diagram of the assembly process of the first supporting portion, the second supporting portion and the fixing portion of the driving device in the illustrated embodiment.

[0032] Figure 13for Figure 11 Schematic diagram of the assembly process of the movable part of the driving device in the embodiment shown.

[0033] Figure 14 for Figure 11 Schematic diagram of the assembly process of the piezoelectric actuator and pre-stressed member of the driving device in the embodiment shown.

[0034] Figure 15 for Figure 11 Schematic diagram of the assembly process of the pressing block and pre-pressing member of the driving device in the embodiment shown.

[0035] Figure 16 Schematic diagram of the cross-sectional structure of the driving device in the optical axis direction in a modified embodiment of the present application.

[0036] Figure 17 Schematic diagram of the structure of the driving device in a modified embodiment of the present application without a fixed part.

[0037] Figure 18 This is a structural diagram of a pressure block, a pre-pressing member, and a piezoelectric actuator of a driving device in a modified embodiment of the present application.

[0038] Figure 19 This is a structural schematic diagram of the pressure block, pre-pressing member and piezoelectric actuator of the driving device from another perspective in a modified embodiment of the present application.

[0039] Figure 20 A schematic diagram of the cross-sectional structure of a camera module in a first direction in a modified embodiment of the present application.

[0040] Figure 21 This is a structural side view of a pressing block, a pre-pressed member, and a piezoelectric actuator in a modified embodiment of the present application.

[0041] Figure 22 for Figure 21 Enlarged view of point A.

[0042] Figure 23 In another embodiment Figure 21 Enlarged view of point A.

[0043] In the picture: 10. Fixed portion; 11. First fixed sidewall; 111. First guide groove; 112. First accommodating groove; 113. Second accommodating groove; 114. Base extension portion; 1141. Second mounting plane; 115. Mounting groove; 12. Fixed body; 13. Second fixed sidewall; 131. First supporting groove; 14. Conductive member; 141. Conductive portion; 15. Flexible circuit board; 20. Movable portion; 21. First movable sidewall; 211. Second guide groove; 22. Friction portion; 221. Friction plate; 23. Second movable sidewall; 231. Second supporting groove; 30. Piezoelectric actuator; 31. Piezoelectric active portion; 32. Friction head; 33. Conductive member; 34. Buffer member; 331. First connecting portion; 333. Second connecting portion; 334. Conductive member; 3301. Main body; 3302. Extension portion; 3302. , extension area; 33022, extension leg; 3303, welding part; 3300, opening; 40, pre-pressed part; 41, fixed end; 411, fixing hole; 42, elastic part; 43, bending part; 44, mounting part; 50, pressing block; 51, downward pressure beam; 52, downward pressure arm; 521, downward pressure fixing platform; 522, downward pressure mounting platform; 523, first mounting plane; 524, mounting column; 500, groove; 61, first supporting part; 62, second supporting part; 601, supporting ball; 602, small ball; 70, magnetic component; 71, first magnetic component; 711, base part; 712, supporting part; 72, second magnetic component; 80, photosensitive component; 90, light turning element; 100, optical lens; 110, position sensing component; 1101, position sensing element; 1102, position sensing magnet. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings showing multiple embodiments of this application. It should be understood that the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments described in this application, all other embodiments obtained by ordinary technicians in this field without expending creative work will fall within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by one skilled in the art to which this application belongs. The terms used in this application's specification and claims are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including," "comprising," "having," "having," "containing," and "containing" in the specification and claims of this application and the accompanying drawings are open-ended terms. Thus, "including," "comprising," and "having" refer, for example, to a method or apparatus having one or more steps or elements, but are not limited to having only those one or more elements. The terms "first," "second," and "first" in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, not to describe a specific order or priority. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance or to implicitly specify the number of the technical features indicated. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of the features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0046] In the description of the present application, it should be understood that the terms "center", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0048] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive with other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0049] As mentioned above, it should be emphasized that when the term "include / comprises" is used in this specification, it is used to clearly indicate the presence of the features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps, components or groups of features, integers, steps, components. As used in this application, the singular forms "a", "an" and "the" also include the plural forms, unless the context clearly indicates otherwise.

[0050] The terms "a" and "an" used in this specification may mean one, but may also have the same meaning as "at least one" or "one or more." The term "about" generally means plus or minus 10%, or more specifically, plus or minus 5%, of the referenced value. The term "or" used in the claims means "and / or" unless it is expressly stated that it refers only to alternatives.

[0051] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0052] according to Figures 1 to 23 As shown, one or more embodiments of the present application disclose a driving device, comprising: a movable portion 20 for carrying an optical lens 100, the optical lens 100 defining an optical axis, the movable portion 20 comprising a first movable side wall 21; a fixed portion 10, the movable portion 20 being movably disposed within the fixed portion 10, the fixed portion 10 comprising a first fixed side wall 11, the first movable side wall 21 being opposite to the first fixed side wall 11 along a first direction, the first direction being perpendicular to the optical axis; a position sensing component 110, comprising a position sensing element 1101 and a position sensing magnet 1102 being oppositely disposed along the first direction, the position sensing element 1101 and the position sensing magnet 1102 being opposite to each other. A position sensing magnet 1102 is disposed on the first movable side wall 21; a piezoelectric actuator 30 is in frictional contact with the top of the first movable side wall 21 and is used to drive the movable part 20 to move along the optical axis; a conductive member 33 is disposed on the top of the piezoelectric actuator 30 and is electrically connected to the piezoelectric actuator 30, and the conductive member 33 is bent from the top of the piezoelectric actuator 30 to the first fixed side wall 11; a flexible circuit board 15 is disposed on the first fixed side wall 11, and the position sensing element 1101 and at least a portion of the conductive member 33 are respectively located on both sides of the flexible circuit board 15 and are electrically connected to the flexible circuit board 15.

[0053] The present application realizes conduction between the position sensing component 110 and the conductive member 33 on the first fixed side wall 11 by setting the bent conductive member 33 and the flexible circuit board 15, and the position sensing element 1101 and the conductive member 33 are respectively located on both sides of the flexible circuit board 15 and electrically connected to the flexible circuit board 15, wherein the position sensing element 1101 and the conductive member 33 are located on the outside of the first movable side wall 21, wherein the position sensing element 1101 is located on the inside of the first fixed side wall 11, so that the position sensing magnet 1102 is closer to the driving source, ensuring the measurement accuracy and signal transmission speed, and the conductive member 33 is located on the outside of the flexible circuit board 15 to avoid structural interference between the conductive member 33 located on the inside and the position sensing element 1101, while preventing the conductive member 33 located on the inside from excessive bending and causing the risk of breakage. This conduction method allows the conductive member 33 and the position sensing element 1101 to be centrally connected to the flexible circuit board 15, which is then used to conduct electricity to other external components. This simplifies the conduction circuit and facilitates soldering between the conductive member 33 and the flexible circuit board 15. Furthermore, the structure of the driving device can be made more compact.

[0054] like Figure 1 As shown, the optical lens 100 defines an optical axis that is perpendicular to a first direction and a second direction. Specifically, the first direction is defined as the width direction of the periscope camera module along the Y-axis, the second direction is defined as the height direction of the periscope camera module along the Z-axis, and the optical axis direction is defined as the length direction of the periscope camera module along the X-axis. It is understood that the setting of the coordinate system can be flexibly set according to actual needs and is not limited here.

[0055] In an embodiment of the pre-stress drive structure of the present application, the pre-stress drive structure of the drive device includes a piezoelectric actuator 30, a pre-stressing member 40 and a pressure block 50. The piezoelectric actuator 30 is arranged on the upper part of at least a portion of the movable part 20 along the second direction. The pre-stressing member 40 is arranged on the top of the piezoelectric actuator 30 and applies a pre-stressing force perpendicular to the optical axis direction to the movable part 20. At least a portion of the pre-stressing member 40 is clamped between the piezoelectric actuator 30 and the pressure block 50 along the second direction. The pressure block 50 controls the deformation of the pre-stressing member 40 to generate a pre-stressing force along the second direction. The piezoelectric actuator 30 and the movable part 20 are in contact with each other under the action of the pre-stressing force. The pre-pressed part 40 and the pressing block 50 are arranged above at least a portion of the movable part 20 in the height direction (the second direction Z axis), and the pressing block 50 is coupled to the pre-pressed part 40. Then, by designing the pressing block 50 to be installed on the fixed part 10 from the top for assembly, it helps to simplify the assembly process of the camera module, further reduce the tilting phenomenon of the movable part 20 and the poor consistency of the camera module caused by assembly errors, thereby improving the imaging stability of the camera module. Furthermore, the pressing block 50 can also adjust the degree of deformation of the pre-pressed part 40 to adjust the size of the pre-pressure, thereby improving the performance of the drive device. Furthermore, the pressing block 50 can also protect the pre-pressed part 40 to prevent the pre-pressed part 40 from interfering with other components in the drive device during the deformation process, thereby affecting the performance of the pre-pressed part 40.

[0056] Among them, reference Figure 2 、 Figure 3 and Figure 11 It can be seen that in some embodiments of the piezoelectric actuator 30 of the present application, the piezoelectric actuator 30 includes a piezoelectric active portion 31 and a friction head 32 that are interconnected. Due to the pre-compression force applied by the pre-compression member 40 to the piezoelectric actuator 30 in the second direction toward the movable portion 20, the movable portion 20 and the friction head 32 in the piezoelectric actuator 30 always maintain frictional contact. This is conducive to driving the movable portion 20 to move along the optical axis after the piezoelectric active portion 31 receives voltage, reducing the shaking and tilt of the optical lens 100 during the driving process, thereby improving the imaging accuracy and imaging stability of the camera module during autofocus. Specifically, the friction head 32 is in frictional contact with the top of the first movable side wall 21.

[0057] As can be understood, by maintaining the movable portion 20 in contact with the friction head 32, the movable portion 20 can move smoothly and quickly when driven, further improving the movable portion 20's response speed to the piezoelectric actuator 30 and shortening the time spent in the focusing process. Furthermore, while facilitating the improvement of the driving force provided by the piezoelectric actuator 30, this also enhances the stability of the camera module, reduces image jitter, and thus improves image quality.

[0058] Among them, an imaginary line of the action direction of the pre-pressure in the second direction passes through the pressure block 50, the pre-pressing member 40, the friction head 32 and the first support part 61, ensuring that the action area of ​​the movable part 20 subjected to the pre-pressure and supported by the first support part 61 is concentrated as much as possible in the same direction on the first movable side wall, so as to reduce the tipping moment and maintain the movement stability of the movable part 20.

[0059] Furthermore, the cross-sectional center of the pressure block 50, the position where the friction head 32 acts on the movable part 20 and the cross-sectional center of the first support part 61 are aligned in the second direction, thereby improving the targeted effect of the supporting force and reducing the overturning moment more accurately.

[0060] In some embodiments, a portion of the movable portion 20 that contacts the friction head 32 is disposed on the same side as the pressing block 50 . Figure 7 As shown, a side of the movable portion 20 adjacent to the piezoelectric actuator 30 extends along the width direction (first direction Y-axis) toward an inner sidewall of the fixed portion 10 on which the piezoelectric actuator 30 is mounted, so as to be disposed on the same side as the pressure block 50. A portion of the movable portion 20 abutting the friction head 32, the friction head 32, the piezoelectric active portion 31, and the pressure block 50 are sequentially distributed along the second direction within a sidewall of the fixed portion 10 to enhance the compactness of the structural distribution on this side and, to a certain extent, ensure that the preload applied downward along the second direction is perpendicular to the friction surface (XY interface) of the movable portion 20 with the friction head 32, thereby maximizing the actuating effect of the preload and improving driving efficiency.

[0061] refer to Figure 5 and Figure 6 It can be seen that in some embodiments, the fixed portion 10 is provided with a first accommodating groove 112 and a second accommodating groove 113, and the first accommodating groove 112 and the second accommodating groove 113 are opened on the same side of the fixed body 12 along the second direction, and the first accommodating groove 112 can be communicatively located at the upper part of the second accommodating groove 113, and the pressing block 50 is arranged in the first accommodating groove 112, and one side of the movable portion 20 is accommodated in the second accommodating groove 113, wherein the size of the first accommodating groove 112 along the optical axis direction is larger than the size of the second accommodating groove 113 along the optical axis direction.

[0062] Specifically, since the length of the first accommodating groove 112 along the optical axis is greater than the length of the second accommodating groove 113 along the optical axis, the pressing block 50 accommodated in the first accommodating groove 112 can be fixed to the fixing portion 10, further increasing the stability and reliability of the pressing block 50.

[0063] Furthermore, the pressure block 50 is placed in the first accommodating groove 112, the movable part 20 is placed in the second accommodating groove 113, and the pre-pressed part 40 and the piezoelectric actuator 30 are arranged in sequence between the pressure block 50 and the movable part 20, making the structure more compact and increasing the space utilization inside the camera module.

[0064] It can be understood that the length of the second accommodating groove 113 along the optical axis is greater than the length of the movable part 20 along the optical axis, thereby providing space for at least a portion of the movable part 20 to move along the optical axis when driven by the piezoelectric actuator 30 in the second accommodating groove 113.

[0065] In one embodiment of supporting the movable part 20 of the present application, the driving device further includes a first supporting part 61 and a second supporting part 62 located between the fixed part 10 and the movable part 20. The length directions of both are parallel to the optical axis direction (the third direction X axis) and are located on opposite sides of the bottom of the fixed part 10 and the movable part 20 along the width direction (the first direction Y axis). The first supporting part 61 is arranged on the same side as the piezoelectric actuator 30, and the second supporting part 62 is arranged on the opposite side of the piezoelectric actuator 30, so that the movable part 20 can move stably on the fixed part 10, thereby improving the stability of the driving device.

[0066] The first support portion 61 is disposed between the fixed portion 10 and the movable portion 20 along the second direction. The upper and lower portions of at least a portion of the movable portion 20 maintain frictional contact with the piezoelectric actuator 30 and the first support portion 61, respectively. In this driving device, the pre-compression member 40, the piezoelectric actuator 30, the movable portion 20, and the first support portion 61 are sequentially clamped between the pressure block 50 and the fixed portion 10 along the second direction. The pressure block 50, the pre-compression member 40, and the piezoelectric actuator 30 are sequentially positioned along the second direction on top of the first movable sidewall 21 of the movable portion 20. The first support portion 61 provides an upward supporting force for the first movable sidewall 21 along the second direction. The pre-compression member 40 deforms under the combined action of the first support portion 61 and the pressure block 50 to generate a preload. It should be understood that if the pressure block 50 is not fixed to the fixed portion 10, the pre-pressed part 40 and the pressure block 50 will move upward in the second direction under the action of the first support portion 61, causing the pressure block 50, the pre-pressed part 40 and the piezoelectric actuator 30 to disengage from the movable portion 20, thereby causing the pre-pressed part 40 to be unable to deform and generate pre-pressure, affecting the drive. To avoid the above situation, in the present application, the pressure block 50 is fixedly connected to the fixed portion 10, and then under the action of the first support portion 61, the pressure block 50 will generate a downward pressure in the second direction due to the connection with the fixed portion 10. On the one hand, it can prevent the pre-pressed part 40 and the pressure block 50 from disengaging; on the other hand, it can maintain the deformation generated by the pre-pressed part 40, thereby ensuring the generation of pre-pressure. The direction of the pre-pressure is the same as the direction of the downward pressure, which is opposite to the direction of the supporting force. It is understandable that if only a pre-pressure is applied to the top side of the movable portion 20 on one side, the risk of the movable portion 20 tipping over may increase. Therefore, in order to maintain the force balance of the movable part 20, the first support part 61 provides the movable part 20 with a support force in the opposite direction of the preload force to balance the preload force and reduce the risk of the movable part 20 tipping over.

[0067] Specifically, the fixed portion 10 and the movable portion 20 are provided with guide grooves and support grooves for accommodating the first support portion 61 and the second support portion 62, respectively. More specifically, the guide grooves include a first guide groove 111 located on the first fixed side wall 11 and a second guide groove 211 located on the first movable side wall 21, with the first support portion 61 disposed therebetween. The support grooves include a first support groove 131 located on the second fixed side wall 13 and a second support groove 231 located on the second movable side wall 23, with the second support portion 62 disposed therebetween.

[0068] In some embodiments, the pre-compression member 40 deforms under the action of the pressure block 50 and the first support portion 61 to generate a pre-compression force. The pre-compression force is directed in the same direction as the downward force. This pre-compression force ensures that the friction head 32 maintains frictional contact with the movable portion 20, facilitating the piezoelectric actuator 30 to generate a stable driving force.

[0069] The size of the pressing block 50 along the optical axis is larger than the size of the first support portion 61 along the optical axis, and along the optical axis, the projection of the first support portion 61 along the second direction is entirely within the projection range of the pressing block 50 along the second direction. This allows for a more uniform force to be applied to the multiple support portions of the first support portion 61. The second direction is perpendicular to the optical axis. Furthermore, the size of the pressing block 50 along the optical axis is also larger than the size of the second guide groove 211 along the optical axis, and along the optical axis, the projection of the second guide groove 211 along the second direction is entirely within the projection range of the pressing block 50 along the second direction. This allows for even if the position of the first support portion 61 within the second guide groove 211 changes, along the optical axis, the projection of the first support portion 61 along the second direction can still remain entirely within the projection range of the pressing block 50 along the second direction. As previously mentioned, the pressing block 50 can provide deformation space for the pre-pressed part 40, maintain the deformation generated by the pre-pressed part 40, and adjust the magnitude of the pre-pressure generated by the pre-pressed part 40. Because the first support portion 61, the pressure block 50, and the pre-compression member 40 are located on the same side relative to the optical axis, the pre-compression force can be applied more directly to the first support portion 61, and the pre-compression force adjustment by the pressure block 50 can also be directly applied to the first support portion 61. Since the projections of the first support portion 61 along the second direction are all within the projection of the pressure block 50 along the second direction, the pressure block 50 maintains a tight spatial fit between the pre-compression member 40 and the first support portion 61, thereby generating pre-compression force and supporting force. Furthermore, during the driving process, the first support portion 61 is always within the range of the pressure block 50, reducing the risk of the movable portion 20 tipping over and improving the stability of the driving device. Furthermore, the pre-compression force adjusted by the pressure block 50 can be dispersed by the multiple support portions of the first support portion 61, making the force applied to each support portion more uniform. In particular, in the event of a fall or impact, the multiple support portions can disperse the impact force, reducing the risk of denting the first support portion 61. Furthermore, the pressure block 50 can also protect the first support portion 61 in its original position, preventing it from detaching and affecting the reliability of the driving device.

[0070] To facilitate explanation of the orientation of the piezoelectric actuator 30 and the supporting portion on the driving device, the two side walls of the fixed portion 10 relative to the first movable sidewall 21 and the second movable sidewall 23 of the movable portion 20 are defined as the first fixed sidewall 11 and the second fixed sidewall 13. The pressing block 50, the pre-pressing member 40, and the piezoelectric actuator 30 are sequentially arranged along the second direction on top of the first fixed sidewall 11 of the fixed portion 10. The friction head 32 of the piezoelectric actuator 30 acts on the top of the first movable sidewall 21 of the movable portion 20. The friction head 32 of the piezoelectric actuator 30 is in frictional contact with the top of the first movable sidewall 21. The pre-pressing member 40 is disposed on top of the piezoelectric active portion 31 of the piezoelectric actuator 30, and the pressing block 50 is located on top of the pre-pressing member 40. The first supporting portion 61 is disposed between the bottom of the first movable sidewall 21 and the first fixed sidewall 11 , and the second supporting portion 62 is located between the bottom of the second movable sidewall 23 and the first fixed sidewall 11 .

[0071] Since the pre-pressing member 40 is only provided on the first movable side wall 21 of the movable part 20, the supporting force provided to the bottom of the second movable side wall 23 of the movable part 20 by the second supporting part 62 further balances the pre-pressure generated on the first movable side wall 21 of the movable part 20. On the one hand, it avoids excessive friction generated by the surface contact between the movable part 20 and the fixed part 10, resulting in poor driving effect. On the other hand, the provision of the second supporting part 62 is conducive to improving the parallelism of the movable part 20 during movement, further improving the stability of the optical lens 100, and enhancing the imaging quality of the camera module.

[0072] It can be understood that the first support portion 61 is tightly fitted and abuts between the fixed portion 10 and the movable portion 20, while the second support portion 62 is loosely fitted between the fixed portion 10 and the movable portion 20. Consequently, a gap exists between the fixed portion 10 and / or the movable portion 20 on one side of the second support portion 62. This gap provides a predetermined amount of space for adjusting the position of the movable portion 20. In other words, when the movable portion 20 is driven by the piezoelectric actuator 30, the first support portion 61 provides stable support for the movable portion 20, ensuring parallelism during movement. If the movable portion 20 tilts, the gap in the second support portion 62 provides a certain margin for adjusting the position of the movable portion 20. Furthermore, when the movable portion 20 tilts to a certain extent, the abutment between the fixed portion 10 and the movable portion 20 corrects the motion of the movable portion 20, preventing further tilt and thus preventing the tilt of the movable portion 20 from affecting driving performance. Furthermore, this arrangement facilitates assembly. A tight fit facilitates the installation and positioning of the movable portion 20, while a loose fit facilitates adjustment of the movable portion 20, further reducing assembly tolerances and improving the assembly accuracy of the camera module. It should be understood that in the present application, the tilting of the movable portion 20 includes: tilting of the movable portion 20 with a tendency to rotate about the optical axis, tilting of the movable portion 20 with a tendency to rotate about a first direction, and tilting of the movable portion 20 with a tendency to rotate about a second direction.

[0073] In some embodiments, the first support portion 61 and the second support portion 62 can also be tightly fitted and abutted between the fixed portion 10 and the movable portion 20 at the same time, so as to always provide stable support to the movable portion 20 through the first support portion 61 and the second support portion 62, so as to ensure the parallelism of the movable portion 20 during movement and reduce the risk of the movable portion 20 tilting.

[0074] Furthermore, when the movable portion 20 is driven to move along the optical axis, the primary supporting component is the first supporting portion 61. The linear distance between the contact point between the friction head 32 and the movable portion 20 and the first supporting portion 61 is less than the linear distance between the contact point between the friction head 32 and the movable portion 20 and the second supporting portion 62. Because the first supporting portion 61 utilizes a tight-fitting assembly method, the linear distance between the contact point between the friction head 32 and the movable portion 20 and the first supporting portion 61 is the lever arm value corresponding to the overturning moment of the movable portion 20. By reducing the lever arm value, the overturning moment value is further reduced, thereby avoiding the risk of the movable portion 20 tilting. Furthermore, the tight-fit and loose-fit assembly methods described above can be considered based on the tolerance values ​​during the assembly process. For example, the tolerance between the first supporting portion 61 and the movable portion 20 and the fixed portion 10 is relatively small, for example, 0.01, while the tolerance between the second supporting portion 62 and the movable portion 20 and the fixed portion 10 is relatively large, for example, 0.02. At this time, when the movable portion 20 is not tilted, the first support portion 61 provides support for the movable portion 20. Only when the movable portion 20 tilts does the second support portion 62 provide support for the movable portion 20 to straighten the movable portion 20. This can reduce the possibility of the movable portion 20 tilting to a certain extent, helping to improve the imaging quality of the camera module.

[0075] refer to Figure 2 、 Figure 7 and Figure 11 As shown, the movable part 20 includes a first movable side wall 21 and a second movable side wall 23 relative to each other, and the first movable side wall 21 and the second movable side wall 23 are arranged opposite to each other along the first direction. The first movable side wall 21 is provided with a friction portion 22, and the second guide groove 211 is opened on the bottom surface of the first movable side wall 21 and is arranged opposite to the first guide groove 111 on the fixed part 10 along the second direction. The first support portion 61 is installed between the first guide groove 111 and the second guide groove 211, so that the bottom surface of the first movable side wall 21 abuts against the first support portion 61, the friction portion 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 accommodating groove 113. The second support groove 231 is formed in the bottom surface of the second movable side wall 23 and is arranged opposite to the first support groove 131 along the second direction. The second support portion 62 is installed between the first support groove 131 and the second support groove 231, so that the bottom surface of the second movable side wall 23 abuts against the second support portion 62. The present application stably clamps the support portion between the movable portion 20 and the fixed portion 10 by assembling the support portion in the guide groove and the support groove, thereby increasing the stability of the camera module.

[0076] The fixing portion 10 further includes a first fixing sidewall 11, a second fixing sidewall 13, and a fixing body 12. The first fixing sidewall 11 and the second fixing sidewall 13 are respectively disposed on opposite sides of the fixing body 12 along the second direction. The first accommodating groove 112 and the second accommodating groove 113 are formed in the first fixing sidewall 11 along the second direction, so that the pressing block 50 abuts against the top side of the first fixing sidewall 11. The first guide groove 111 and the first supporting groove 131 are respectively disposed in the first fixing sidewall 11 and the second fixing sidewall 13. Among them, the first support portion 61 is installed in the first guide groove 111 and supports the first movable side wall 21 of the movable portion 20, and the second support portion 62 is installed in the first support groove 131 and supports the second movable side wall 23 of the movable portion 20. The arrangement of the first support portion 61 and the second support portion 62 can reduce the friction resistance force encountered by the movable portion 20 when it is driven to move, which is beneficial to improving the driving performance in the camera module. The first guide groove 111 and the first support groove 131 are arranged flush on both sides of the fixed portion 10 along the first direction, so that the first support portion 61 and the second support portion 62 are arranged relatively flush along the first direction, providing a stable support effect for the movable portion 20. Further, as Figure 4 、 Figures 16 to 19 As shown, since the piezoelectric actuator 30 drives the movable portion 20 from the top, simply placing the first and second support portions 61 and 62 flush with the bottom of the movable portion 20 provides stable support for the movable portion 20, further enhancing the stability of the movable portion 20 when driven along the optical axis. In other words, when the piezoelectric actuator 30 drives the movable portion 20, the support portions provided at the bottom of the movable portion 20 and on the side opposite the piezoelectric actuator 30 prevent the movable portion 20 from tilting during actuation by the piezoelectric actuator 30. Furthermore, there is no need for additional support portions on the sides or top of the movable portion 20, thereby reducing the number of support portions in the camera module and optimizing the assembly process, further reducing assembly tolerances and increasing assembly consistency.

[0077] Specifically, because the movable portion 20 moves along the optical axis, the first support portion 61 and the second support portion 62 are provided between the movable portion 20 and the fixed portion 10 to support the movable portion 20 under its own gravity. To further maintain the stability of the optical lens 100, the first support portion 61 and the second support portion 62 are arranged as close to the optical axis as possible along the first direction on both sides of the bottom of the movable portion 20 to provide the movable portion 20 with as symmetrical support as possible, thereby reducing the risk of the movable portion 20 tilting.

[0078] It is understood that since the second movable sidewall 23 is not provided with components such as the piezoelectric actuator 30, the length of the second movable sidewall 23 along the optical axis does not need to be increased. In other words, the length of the second movable sidewall 23 along the optical axis can be less than the length of the first movable sidewall 21 along the optical axis, which helps to increase the compactness of the drive device structure and further reduce the weight and size of the movable portion 20. The piezoelectric actuator 30 and the pre-pressed member 40 are arranged on the top side of the first movable sidewall 21. On the one hand, this makes better use of the internal space of the camera module. This is because the piezoelectric actuator 30 and the pre-pressed member 40 both extend along the optical axis, and the corresponding first movable sidewall 21 of the movable portion 20 also needs to extend along the optical axis. In other words, the first movable sidewall 21 needs to have a certain length to increase the driving stroke of the piezoelectric actuator 30. Furthermore, by positioning the first support portion 61 on the bottom surface of the first movable side wall 21, there is room for a longer space to accommodate the first support portion 61, thereby providing a larger support area. Conversely, since the piezoelectric actuator 30 does not need to be positioned on one side of the second movable side wall 23, a shorter length can be provided to provide sufficient space for the second support portion 62. This, on the one hand, not only enhances the structural compactness of the lens drive device but also helps reduce its size. On the other hand, since the optical focus stroke in the periscope camera module is relatively long, this design also helps ensure that the first support portion 61 and the second support portion 62 consistently provide stable support for the movable portion 20 over long strokes. Since the optical focus stroke in the camera module is relatively long, this design helps ensure that the support portions consistently provide effective support for the movable portion 20 over long strokes.

[0079] like Figure 8 As shown, in some embodiments, the first support portion 61 and the second support portion 62 are respectively at least two support portions spaced apart along the optical axis, and the spacing between the at least two support portions of the first support portion 61 is greater than the spacing between the at least two support portions of the second support portion 62. It is understood that the first support portion 61 is assembled within the second guide groove 211, and the second support portion 62 is assembled within the second support groove 231. As described above, the length of the second movable side wall 23 along the optical axis can be less than the length of the first movable side wall 21 along the optical axis to provide sufficient movement space for the first support portion 61 and the second support portion 62. The support portion can be implemented as a ball or a slider.

[0080] In some embodiments, the movable portion 20 and / or the fixed portion 10 are provided with a guide structure suitable for mounting the support portion, such as a guide groove or guide rail structure. Since the support portion is arranged along the optical axis, it is convenient to guide the movable portion 20 to move along the optical axis. It is understood that the inner side of the guide groove or guide rail is provided with a metal insert to help reduce wear of the support portion when it moves within the guide groove or guide rail, reduce the risk of the support portion getting stuck during use, and further improve the quality and life of the camera module.

[0081] In some embodiments, the first support portion 61 can be implemented as a plurality of support portions arranged in sequence along the optical axis. It should be understood that, on the one hand, increasing the number of support portions can improve the stability and load-bearing capacity of the movable portion 20, making the movable portion 20 more stable when moving along the optical axis; on the other hand, since the motion state of a single support portion is uncertain, the support portion may be in a rolling state or a sliding state, and increasing the number of support portions can compensate for the motion states between the support portions. Furthermore, the second support portion 62 can be implemented as a plurality of support portions arranged in sequence along the optical axis, so that the opposite sides of the movable portion 20 are supported in a balanced manner. Specifically, the number of support portions included in the first support portion 61 is greater than or equal to 3, and the number of support portions included in the second support portion 62 is greater than or equal to 3.

[0082] like Figure 8 As shown, in some embodiments, two second guide grooves 211 are opened on the bottom surface of the first movable side wall 21 at intervals along the optical axis direction, and two second support grooves 231 are opened on the bottom surface of the second movable side wall 23 at intervals along the optical axis direction, and the distance between the farthest end points of the two second guide grooves 211 is greater than the distance between the farthest end points of the two second support grooves 231.

[0083] Due to the preload, the friction head 32 drives the friction portion 22 on the first movable sidewall 21. This increases the length of the first movable sidewall 21 of the movable portion 20 along the optical axis, thereby increasing the length of the friction portion 22 along the optical axis. Furthermore, the piezoelectric actuator 30 and the first support portion 61 are both located on the first movable sidewall 21. Because both the piezoelectric actuator 30 and the preload member 40 extend along the optical axis, the corresponding first movable sidewall 21 also needs to extend along the optical axis. In other words, the first movable sidewall 21 has a certain length along the optical axis, leaving more space on the bottom side of the first movable sidewall 21 for the first support portion 61. To further improve the balance of the structure, the distance between the first support portions 61 can be appropriately increased. Specifically, the second guide groove 211 and the second support groove 231 can be circular, rectangular, hemispherical, U-shaped, V-shaped, pyramidal, or other shapes.

[0084] In some embodiments, two of the second guide grooves 211 are opened at intervals along the optical axis on the bottom surface of the first movable side wall 21, suitable for the first support portion 61 to be installed in the second guide groove 211 and the first guide groove 111, and two of the second support grooves 231 are opened along the optical axis on the bottom surface of the second movable side wall 23, suitable for the second support portion 62 to be installed in the second support groove 231 and the first support groove 131, which is beneficial to improving the installation stability of the support portion and optimizing the assembly process.

[0085] Furthermore, since the support portion structure is assembled inside the guide groove, as the distance between the two second guide grooves 211 increases, the distance between the two support portions of the first support portion 61 assembled in the two second guide grooves 211 also increases, thereby making the support area formed by the line connecting the first support portion 61 and the second support portion 62 larger, thereby reducing the risk of the movable portion 20 tilting during movement.

[0086] In some embodiments, as Figure 6 As shown, along the second direction, the projection of the friction portion 22 overlaps with the line connecting the projections of the two distal end points of the second guide grooves 211. This overlaps with the line connecting the projections of the two support portions of the first support portion 61, which helps mitigate the risk of the movable portion 20 tipping over in the left-right and front-to-back directions. Therefore, increasing the distance between the two support portions of the first support portion 61 provides a larger support area for the movable portion 20 and provides a stable support force throughout the entire travel range of the movable portion 20, reducing the possibility of the movable portion 20 tipping over in the front-to-back direction. In other words, the length of the friction portion 22 along the optical axis is less than the distance between the distal end points of the two second guide grooves 211 along the optical axis.

[0087] In some embodiments, the first support portion 61 and the second support portion 62 each include two balls for providing a stable support force for the movable portion 20. Furthermore, each ball is disposed in a single pair of guide grooves to avoid interference between the two balls. It is understandable that the greater the distance between the two balls spaced apart along the optical axis of the first support portion 61 and the second support portion 62, the more stable the support force provided to the movable portion 20, further enhancing the stability and reliability of the optical lens 100. When the distance between the two balls provided in the first support portion 61 is greater than the distance between the two balls provided in the second support portion 62, the support surface area formed by the support portion is increased, thereby increasing the stability of the optical lens 100.

[0088] In some embodiments, the projection of the friction head 32 of the piezoelectric actuator 30 along the second direction overlaps with the projection of the line connecting the first support portion 61 along the second direction, further reducing the overturning moment value and reducing the risk of the movable portion 20 overturning.

[0089] In some embodiments, the piezoelectric actuator 30 includes two friction heads 32, which are spaced apart along the optical axis and disposed on the piezoelectric active portion 31. The distance between the two friction heads 32 of the piezoelectric actuator 30 is smaller than the distance between the two support portions of the first support portion 61. This helps reduce preload deviation and evenly distributes the preload on the two support portions of the first support portion 61, thereby reducing wear and damage to the first support portion 61 caused by uneven preload. Furthermore, when the piezoelectric active portion 31 vibrates and deforms, causing the friction heads 32 to move, the angle of contact between the friction heads 32 and the movable portion 20 changes with the movement. This causes the force generated between the friction heads 32 and the movable portion 20 to not always be parallel to the optical axis. Instead, the force may be tilted relative to the plane of the first movable sidewall 21 of the movable portion 20. This tilted force may further cause the movable portion 20 to tilt. Therefore, a larger distance between the two support portions of the first support portion 61 can provide a larger support area for the movable portion 20 , thereby reducing the overturning moment value and further reducing the risk of the movable portion 20 tilting.

[0090] In some embodiments, an imaginary line of the direction of the preload applied to the movable portion 20 intersects with a line connecting the first support portions 61 , which helps reduce the overturning moment value and further reduces the risk of the movable portion 20 tilting.

[0091] In some embodiments, the position at which the friction head 32 of the piezoelectric actuator 30 acts on the first movable sidewall 21 is aligned with the cross-sectional center of the first support portion 61 in the second direction. This arrangement facilitates the preload applied by the preload member 40 to stably and directly act on the first support portion 61, increasing the stability of the preload transmission, thereby reducing errors caused by poor component alignment and improving the reliability of the camera module. Furthermore, this alignment helps reduce localized excessive wear on the first support portion 61, extending the service life of the camera module while reducing the overturning moment value, further reducing the risk of tilting the optical lens 100.

[0092] In some embodiments, reference Figures 8 to 10The first support portion 61 and the second support portion 62 are independently molded parts relative to the movable portion 20 and the pressing block 50. Furthermore, the first support portion 61 can be a multi-point structure spaced apart along the optical axis, such as a ball or a slider. The second support portion 62 can be a multi-point structure or a guide rail structure spaced apart along the optical axis, such as a ball, a slider or a guide rod. When a guide rod is used as a support portion, the better linearity can increase the stability and reliability of the movable portion 20 when being driven to move, and further reduce the tilting or overturning phenomenon of the optical lens 100. Specifically, the second support groove 231 equipped with the second support portion 62 can be trapezoidal, rectangular, V-shaped, etc.

[0093] It is understood that when the first support portion 61 utilizes balls as its support structure and the second support portion 62 utilizes guide rods as its support structure, the downward pressure in the second direction exerted on the second support portion 62 is primarily due to the magnetic attraction force provided by the magnetic assembly 70, which is less than the pressure exerted on the first support portion 61. The pressure exerted on the first support portion 61 includes both the magnetic attraction force provided by the magnetic assembly 70 and the preload provided by the preload member 40. This reduces the friction generated by the surface contact of the second support portion 62, thereby reducing the power consumption of the piezoelectric actuator 30. On the other hand, if the first support portion 61 utilizes guide rods as its support structure, the greater pressure applied to the guide rod structure, which has a higher coefficient of friction, will affect the driving effect of the piezoelectric actuator 30. It is understood that when balls are used as the support structure, the balls utilize point contact with the guide rails and guide grooves, resulting in minimal rolling friction and greater sliding friction, which facilitates the driving of the movable portion 20.

[0094] In some embodiments, the first support portion 61 and the second support portion 62 are configured as hemispherical structures fixed to the fixed portion 10 and / or the movable portion 20, or can be bosses, using point contact friction, which is beneficial to reducing wear on the guide groove and the support groove, and extending the service life of the camera module.

[0095] As can be seen from the above, in some embodiments of the support portion of the present application, the first support portion 61 and the second support portion 62 both use balls as the support structure, wherein the number of balls arranged on the same side of the piezoelectric actuator 30 is greater than the number of balls arranged on the opposite side of the piezoelectric actuator 30, for example: the number of the supporting balls 601 of the first support portion 61 is greater than the number of the supporting balls 601 of the second support portion 62, through the synergistic effect of the asymmetric ball layout and the driving position of the piezoelectric actuator 30, the risk of overturning of the driving device is reduced, and the risk of the balls being dented or stuck can also be reduced, thereby improving the reliability and stability of the driving device.

[0096] Because the piezoelectric actuator 30 is driven at the top of the first movable sidewall 21, the pressure block 50 is located at the top of the pre-compression member 40. This pre-compression member 40 generates a pre-compression force parallel to the second direction, directed toward the first support portion 61 at the bottom of the first movable sidewall 21. By adjusting the pre-compression force, the force applied to the first support portion 61 is greater than the force applied to the second support portion 62 at the second movable sidewall 23, thereby reducing the overturning moment on the first movable sidewall 21 and ensuring the stability and reliability of the driving device.

[0097] To solve the above problems, the first support part 61 has a larger number of balls. On the one hand, it can significantly increase the effective support area on the same side as the piezoelectric actuator 30, providing more stable support for the movable part 20; on the other hand, more balls can work together to share the pre-pressure, especially in falling or impact scenarios, multiple balls can disperse the impact force and significantly inhibit the formation of pits on the contact surface.

[0098] Furthermore, the length of the guide groove is designed to be as long as possible. Specifically, a penetrating guide groove is set at the bottom of the first movable side wall 21 to accommodate multiple balls of the first support part 61, thereby increasing the activity space of the first support part 61 and the movement flexibility of the balls, reducing the risk of sliding friction and jamming, and thus meeting the long-stroke movement requirements of the movable part 20.

[0099] Furthermore, the first support portion 61 is configured to have a structure with balls of different sizes, that is, the first support portion 61 includes at least two support balls 601 and at least one small ball 602, wherein all the support balls 601 are of the same size, and the size of the small ball 602 is smaller than the size of the support ball 601.

[0100] like Figure 11 and Figure 16As shown, the first support portion 61 is implemented to include two supporting balls 601 at the front and rear and at least one small ball 602 located between the two. The second support portion 62 is implemented as one supporting ball 601. The three supporting balls 601 each provide a supporting contact point at the bottom of the movable portion 20. The three supporting balls 601 form a triangular supporting surface with a minimum number of supporting balls 601, thereby improving the stability of the support. Among them, in the first support portion 61 at the bottom of the first movable side wall 21, at least one small ball 602 fills the gap between the front and rear supporting balls 601 along the optical axis, extending the side support line and adjusting the distance between the two supporting contact points to optimize the distribution of contact points. At the same time, it improves the movement state of the front and rear supporting balls 601 during the driving process, reduces sliding wear, and improves the stability of the driving device. When the driving device falls or collides, the small ball 602 can disperse the impact force to prevent the supporting balls 601 from forming pits due to concentrated force, thereby improving the reliability of the driving device.

[0101] Specifically, the support ball 601 serving as the first support part 61 is tightly clamped between the second guide groove 211 and the first guide groove 111, providing support and guidance for the first movable side wall 21 on which the piezoelectric actuator 30 is provided. The support ball 601 serving as the second support part 62 is loosely clamped between the second support groove 231 and the first support groove 131. While taking the first support part 61 as the main supporting component and maintaining the basic supporting function, it provides a certain degree of tilt buffering flexibility for the movable part 20 during movement, reduces redundant constraints, and avoids drive failure caused by the superposition of multi-directional stresses.

[0102] Since the size of the support ball 601 is larger than that of the small ball 602, the small ball 602 of the first support part 61 is loosely clamped in the second guide groove 211 and the first guide groove 111, preventing the first and last support balls 601 of the first support part 61 from getting stuck in the guide groove during movement, so that the two support balls 601 are always in a rolling state, reducing friction.

[0103] In some embodiments, the drive device further includes an embedded component, which is disposed at the contact surface between the first guide groove 111 and the first support portion 61. The embedded component provides a smoother support surface for the first support portion 61. Furthermore, the embedded component of the first guide groove 111 has the same shape as the first guide groove 111. For example, if the first guide groove 111 is a V-shaped groove, the embedded component can also have a V-shaped structure; if the first guide groove 111 is a U-shaped groove, the embedded component can also have a U-shaped structure, or the embedded component can also have a flat structure. On the one hand, this helps to reduce the wear of the first support portion 61 when it moves within the first guide groove 111, extending the service life of the first support portion 61. It can also reduce the risk of the first support portion 61 getting stuck during use, further improving the quality and life of the camera module. On the other hand, it reduces deformation of the first support portion 61, such as pits, caused by excessive force under the action of preload, further enhancing the reliability of the camera module.

[0104] In some embodiments, the drive device further includes an embedded component that is flattened on the contact surface between the first support groove 131 and the second support portion 62 to enhance the support for the second support portion 62. The embedded component of the first support groove 131 has the same shape as the first support groove 131. For example, if the first support groove 131 is a V-shaped groove, the structure of the embedded component can also be V-shaped; if the first support groove 131 is a U-shaped groove, the structure of the embedded component can also be U-shaped, or the structure of the embedded component can also be flat. The embedded component structure can, on the one hand, help reduce the wear of the second support portion 62 when it moves inside the first support groove 131, thereby extending the service life of the second support portion 62; it can also reduce the risk of the second support portion 62 getting stuck during use, further improving the quality and life of the camera module.

[0105] In some embodiments, the second guide groove 211 and the second support groove 231 in the movable part 20 are also provided with an embedded part structure on the contact surface with the support part structure. That is, the first support part 61 is in contact with the embedded part in the second guide groove 211 and the embedded part provided in the first guide groove 111, respectively, and the second support part 62 is in contact with the embedded part in the second support groove 231 and the embedded part provided in the first support groove 131, respectively. By providing the embedded part structure, the wear of the first support part 61 when moving between the first guide groove 111 and the second guide groove 211, and the wear of the second support part 62 when moving between the second support groove 231 and the first support groove 131 are reduced, thereby further improving the quality and life of the camera module. On the other hand, the deformation phenomenon such as pits caused by excessive force on the first support part 61 and the second support part 62 is reduced, thereby further enhancing the reliability of the camera module.

[0106] Furthermore, the embedded component can also be arranged in the guide groove and the support groove in the above manner to achieve similar functions, which will not be repeated here.

[0107] In some embodiments of the guide groove length of the present application, the difference between the length of the guide groove and the minimum spacing of the first support portion 61 is not less than the mechanical stroke of the movable portion 20, so that all the support balls 601 of the first support portion 61 can roll during the entire movement process of the movable portion 20 to support the movable portion 20 and enable the movable portion 20 to have a sufficient moving distance to realize the focusing function of the camera module.

[0108] In some embodiments of the present application, the movable part 20 also includes a friction part 22, which is arranged on the first movable side wall 21 of the movable part 20 and faces the side where the friction head 32 is located, so that the friction head 32 of the piezoelectric actuator 30 is frictionally coupled to the friction part 22 through the pre-pressure action of the pre-pressing part 40. It can be understood that the friction part 22 provided in the present application helps to increase the friction force between the movable part 20 and the friction head 32 of the piezoelectric actuator 30, further enhancing the driving force provided by the piezoelectric actuator 30.

[0109] Specifically, the friction part 22 is implemented as a friction plate 221, which is a split structure with the movable part 20 and is attached to the first movable side wall 21 of the movable part 20 by an adhesive. While achieving friction contact with the friction head 32, it improves the controllability of the friction situation. The split structure reduces the difficulty of manufacturing and maintenance, which is conducive to improving the service life of the camera module.

[0110] In some embodiments, the friction plate 221 may also be integrally formed on the first movable sidewall 21 of the movable portion 20 .

[0111] It can be understood that the provision of the friction portion 22 helps to enhance the friction between the movable portion 20 and the friction head 32 of the piezoelectric actuator 30 , which is beneficial to improving the driving performance in the camera module.

[0112] refer to Figure 2 and Figure 16 As shown, in some embodiments of the friction plate 221 of the present application, at least a portion of the friction plate 221 and the bottom of the movable part 20 maintain friction contact with the piezoelectric actuator 30 and the first support part 61 respectively. Under the action of the pressure block 50 and the pre-pressing member 40, the first support part 61 provides the movable part 20 with an upward support force along the second direction, providing support and guidance for the movable part 20 when it moves stably along the optical axis in the fixed part 10, wherein the direction of the pre-pressure is opposite to the direction of the support force, and both act on the first movable side wall 21, further avoiding the tilting of the movable part 20, thereby enhancing the stability of the optical lens 100 of the camera module during optical focusing and / or optical zooming, thereby improving the imaging quality of the camera module.

[0113] It will be understood that in this application, the piezoelectric actuator 30 is located above the friction plate 221 along the second direction and drives the movable portion 20 from the top side. The pre-compression member 40 applies preload downward along the second direction to the top side of the piezoelectric actuator 30, causing the friction head 32 to come into frictional contact with the friction plate 221 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, located 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.

[0114] like Figure 3 and Figure 16 As shown, the piezoelectric actuator 30 has at least one friction head 32 to provide sufficient driving force for the movable portion 20 to ensure that the movable portion 20 moves along the optical axis under the action of the driving force.

[0115] like Figure 16 and Figure 21As shown, at least a portion of the friction plate 221 is in frictional contact with the friction head 32 of the piezoelectric actuator 30, that is, the total length of the friction plate 221 is greater than the length of the active area of ​​the friction head 32 of the piezoelectric actuator 30, so that the friction head 32 and the friction plate 221 always maintain frictional contact during the movement of the movable part 20. At the same time, the length of the friction plate 221 can adapt to the slight offset of the friction head 32, absorb the displacement deviation caused by assembly tolerance or vibration, ensure the close fit of the contact surface, and thus ensure the continuous transmission of the driving force.

[0116] In some embodiments of the length of the friction plate 221 of the present application, along the optical axis direction, the length of the friction plate 221 is less than the length of the ball groove arranged on the same side as the piezoelectric actuator 30, and greater than the length of the ball groove arranged on the opposite side of the piezoelectric actuator 30, that is, the length of the friction plate 221 is less than the length of the guide groove, and greater than the length of the support groove. While adapting to the piezoelectric actuator 30 applying pre-pressure and friction contact to provide driving force, it avoids the friction plate 221 being too short to affect the moving stroke. At the same time, the friction plate 221 is arranged on the same side as the longer guide groove, and cooperates with the piezoelectric actuator 30 on this side and the first support part 61 tightly clamped in the guide groove, which is beneficial for the camera module to achieve a larger moving stroke and reduce the risk of overturning of the movable part 20.

[0117] In some embodiments of the present application, the minimum total length of the first support portion 61 is greater than the distance between the two friction heads 32, that is, the distance between the first and last support balls 601 arranged on the same side of the piezoelectric actuator 30 is greater than the distance between the two friction heads 32 of the piezoelectric actuator 30, so that the friction point of the friction head 32 during driving is located within the support range of the first and last support balls 601, thereby enhancing the support effect of the first support portion 61 and ensuring smooth movement of the movable portion 20.

[0118] The diameter difference between the supporting ball 601 and the small ball 602 shall not be greater than 0.2 mm, so as to avoid the large difference in ball diameters causing inconsistent rolling trajectories of the balls on the track, thereby reducing the impact on the stability of rolling friction, and at the same time preventing the asynchronous movement between the balls caused by the large difference in ball diameters, effectively preventing the movable part 20 from tilting.

[0119] In this application, if Figures 8 to 10 、 Figure 17As shown, the driving device further includes a magnetic component 70, and the magnetic component 70 includes a first magnetic component 71 and a second magnetic component 72. The first magnetic component 71 is arranged on the main body of the fixed part 10, and the second magnetic component 72 is arranged at the bottom of the movable part 20. The first magnetic component 71 and the second magnetic component 72 are arranged relative to each other along the second direction and interact with each other to generate a magnetic attraction force. Along the first direction, the distance from the second magnetic component 72 to the second support part 62 is smaller than the distance from the second magnetic component 72 to the first support part 61, and the direction of the magnetic attraction force and the pre-pressure are the same. Specifically, the second magnetic component 72 is arranged on the second movable side wall 23 in the movable part 20, and the first magnetic component 71 is arranged on the second fixed side wall 13 in the fixed part 10. The first magnetic component 71 and the second magnetic component 72 are arranged relative to each other along the second direction and generate a magnetic attraction force through interaction. Because the direction of the magnetic attraction is the same as the preload, the preload and magnetic attraction are superimposed on each other. When the magnetic attraction is insufficient to resist external forces, the preload can provide additional support. Furthermore, because the magnetic assembly 70 is located at the bottom of the movable portion 20 and the piezoelectric actuator 30 is located on the top side of the movable portion 20, the movable portion 20 can be supported by providing only a support portion at the bottom, further reducing the number of support portions required in the camera module.

[0120] It is understandable that, since the magnetic attraction component 70 is provided at the bottom of the movable portion 20 and the first movable side wall 21 is subjected to pre-pressure, the movable portion 20 has a tendency to overturn, and therefore a magnetic attraction force needs to be provided to reduce the risk of the movable portion 20 producing an overturning movement. The magnetic attraction force is in the same direction as the pre-pressure force. Along the first direction, the point of action of the magnetic attraction force on the movable portion 20 and the point of action of the pre-pressure force on the movable portion 20 are located on both sides of the optical axis, respectively. On the one hand, this helps to make the movable portion 20 close to the fixed portion 10 and enhance the stability of the camera module. On the other hand, the magnetic attraction force and the pre-pressure force cooperate with each other to further balance the force on the movable portion 20, thereby helping to reduce the tilt of the optical lens 100 caused by unbalanced torque.

[0121] In some embodiments of the present application, the second magnetic member 72 is disposed in the middle area between the two second supporting grooves 231 along the optical axis direction to reduce the overturning moment value and further reduce the risk of the movable portion 20 tilting.

[0122] Specifically, if Figure 10 and Figure 17As shown, the first magnetic member 71 is a metal yoke and includes a base portion 711 and a support portion 712. The projection of at least a portion of the base portion 711 along the second direction overlaps with the projection of the second magnetic member 72 along the second direction, and the projection of at least a portion of the support portion 712 along the second direction overlaps with the projection of the second support portion 62 along the second direction. The provision of the first magnetic member 71 enhances the magnetic attraction, better balances the preload, and reduces the risk of the movable portion 20 tipping over. Furthermore, the magnetic attraction allows the support portion to be stably clamped between the movable portion 20 and the fixed portion 10, enhancing its stability and contributing to improved imaging quality of the camera module.

[0123] In some embodiments of the first magnetic member 71 of the present application, the base portion 711 and the support portion 712 of the first magnetic member 71 are integrally connected, improving processing convenience and increasing processing efficiency. Furthermore, the base portion 711 and the support portion 712 can be separate structures, which helps to improve the flatness of the base portion 711. However, when the area of ​​the base portion 711 is too large, deformation is likely to occur.

[0124] In some embodiments of the shape of the support portion 712 of the present application, the support portion 712 can be set to a V-shape or a flat shape according to the shapes of the first guide groove 111 and the first support groove 131, and is provided on the lower side of the first support portion 61 and / or the second support portion 62 along the second direction to avoid the formation of pits in the first support portion 61 and the second support portion 62, thereby further improving the use quality and service life of the camera module.

[0125] Furthermore, one of the first magnetic member 71 and the second magnetic member 72 is a magnet, and the other is a magnet or a yoke suitable for adsorption with the magnet, and the magnet or the yoke can be fixed by adhesion, insert injection molding, riveting, etc. Since the first movable side wall 21 and the second movable side wall 23 of the movable part 20 are respectively subjected to pre-pressure and magnetic attraction, and the direction of the magnetic attraction is the same as the direction of the pre-pressure, it helps to reduce the risk of the movable part 20 tilting. Specifically, the pre-pressure can be greater than the magnetic attraction, because when the magnetic attraction is too large, the friction resistance that the movable part 20 needs to overcome when it is driven to move will also be greater, further increasing the power consumption of the piezoelectric actuator 30, which is not conducive to the driving of the movable part 20.

[0126] In some embodiments, the first magnetic attraction member 71 is a magnet, and the second magnetic attraction member 72 is an insert-molded yoke, and the yoke can also be used as the conductive member 14 of the fixed portion 10 to simplify the structure. Specifically, the yoke is designed with a metal strip and is sheared and formed after manufacturing. This batch manufacturing method can further improve production efficiency. Furthermore, the yoke used in this application has a large planar area, and increasing the metal pressing area during the manufacturing process can increase the planar regularity. Furthermore, the yoke can be made of a material that is mutually attracted to the magnet, such as a metal material, to further enhance the magnetic attraction, thereby improving the stability of the optical lens 100.

[0127] In some embodiments, the magnetic attraction assembly 70 further includes the first magnetic attraction member 71 and the second magnetic attraction member 72. The first magnetic attraction member 71 located on the movable portion 20 and the second magnetic attraction member 72 provided on the fixed portion 10 interact with each other and generate a magnetic attraction force. Therefore, when the movable portion 20 is driven along the optical axis, the magnetic attraction force generated by the magnetic attraction assembly 70 can ensure that the movable portion 20 is always supported by the support portion during the long-stroke movement of the movable portion 20, and the movable portion 20 will not tilt to a large extent. In addition, the magnetic attraction force generated by the magnetic attraction assembly 70 located on the second movable side wall 23 is consistent with the direction of the pre-pressure generated by the pre-pressing member 40 on the first movable side wall 21, which is conducive to improving the fit between the movable portion 20 and the fixed portion 10, further reducing the tilt of the movable portion 20 caused by torque imbalance, and further reducing the risk of tilting the optical lens 100.

[0128] refer to Figure 1 、 Figure 4 and Figure 11 As shown, in some embodiments, the circuit assembly in the camera module also includes a conductive member 14 arranged around the outer peripheral wall of the fixed portion 10. Specifically, the conductive member 14 is embedded in or externally placed on the first fixed side wall 11 and the second fixed side wall 13, and at least part of the conductive member 14 is exposed on the outer peripheral side of the fixed portion 10. The conductive member 14 is provided with a conductive portion 141. The conductive member 14 is welded to the extended end of the conductive member 33 through the conductive portion 141 and electrically conductive. And the conductive member 14 is used to achieve the conduction of the circuit part of the photosensitive component 80, the light turning element 90 and other circuit modules in a simple electrical connection manner. Among them, as Figure 2 The conductive member 14 with a bent structure shown is easy to connect and adapts to complex spatial layout and shape requirements, further enabling efficient wiring design in a small or irregular space, thereby improving space utilization.

[0129] In some embodiments, the driving device further includes a conductive member 33, such as Figure 3As shown, the conductive member 33 includes a first connecting portion 331, a second connecting portion 333, and a conductive portion 334. The first connecting portion 331 is a horizontal plate disposed along the second direction between the piezoelectric active portion 31 of the piezoelectric actuator 30 and the pre-compression member 40. The second connecting portion 333 is a vertical plate integrally bent along the second direction from the first connecting portion 331. The conductive portion 334 extends from the second connecting portion 333 along the outer peripheral wall of the fixed portion 10 in the optical axis direction and is connected to the conductive member 14 provided on the fixed portion 10. The first connecting portion 331 is a horizontal plate disposed along the second direction between the piezoelectric active portion 31 of the piezoelectric actuator 30 and the pre-compression member 40. The first connecting portion 331 may have a through hole to reduce the impact of the conductive member 33 on the piezoelectric active portion 31. The second connecting portion 333 is a vertical plate integrally bent in the second direction from the first connecting portion 331. The conductive portion 334 extends from the second connecting portion 333 in the second direction along the outer wall of the fixing portion 10 and is connected to the conductive member 14 provided on the fixing portion 10. The provision of the conductive member 33 increases space utilization within the camera module and achieves electrical conductivity.

[0130] like Figure 2-10 The conductive member 33 shown includes a first connecting portion 331, a second connecting portion 333, and a conductive portion 334. The first connecting portion 331 is a horizontal plate disposed along the second direction between the piezoelectric actuator 30 and the pre-compression member 40. The second connecting portion 333 is a vertical plate integrally bent along the second direction from the first connecting portion 331. The conductive portion 334 extends from the second connecting portion 333 along the outer peripheral wall of the fixing portion 10 in the direction of the optical axis and connects to the conductive member 14 provided on the fixing portion 10. The provision of the conductive member 33 increases space utilization within the camera module and achieves electrical continuity.

[0131] In this application, if Figures 11 to 20 As shown, the driving device further includes a position sensing assembly 110 for improving the accuracy of motion position control. The position sensing assembly 110 includes a position sensing element 1101 and a position sensing magnet 1102 arranged opposite to each other along a first direction. The position sensing element 1101 is located on the first fixed side wall 11 of the fixed portion 10, and the position sensing magnet 1102 is located on the first movable side wall 21 of the movable portion 20 to sense the position of the optical lens 100 on the movable portion 20.

[0132] The driving device further includes a flexible circuit board 15, which is arranged on the outside of the first fixed side wall 11. The flexible circuit board 15 includes an inner side and an outer side opposite to each other along a first direction. Along the first direction, the position sensing element 1101 and at least a portion of the conductive member 33 are respectively located on both sides of the flexible circuit board 15 and electrically connected to the flexible circuit board 15, which facilitates the conduction between the position sensing element 1101 and the conductive member 33 and facilitates the welding of the conductive member 33.

[0133] To facilitate position sensing, the position sensing element 1101 is positioned on the first fixed sidewall 11 so that its corresponding position sensing magnet 1102 is closer to the piezoelectric actuator 30, which serves as the driving source. This allows for more accurate measurements and faster signal transmission. It should be understood that when the movable portion 20 tilts, due to the principle of internal wheel differential, the tilt angle on the side with the position sensing magnet 1102 is greater than the tilt angle on the side away from the position sensing magnet 1102. Therefore, the position sensing magnet 1102 is closer to the same side of the piezoelectric actuator 30, resulting in more pronounced sensing. Furthermore, the conductive member 33 is electrically connected to the piezoelectric actuator 30 to establish electrical continuity between the piezoelectric actuator 30 and the flexible circuit board 15. The conductive member 33 bends and extends from the same side as the piezoelectric actuator 30 to the outside of the first fixed sidewall 11. This not only simplifies the structure of the conductive member 33 but also facilitates soldering of the conductive member 33 to the flexible circuit board 15. Therefore, in this application, the position sensing element 1101 and the conductive member 33 are designed to be located on the same side of the first movable sidewall 21. Furthermore, the position sensing element 1101 must align with the position sensing magnet 1102 along the first direction to achieve a better sensing effect. Therefore, in this application, the position sensing element 1101 is located on the inner side of the flexible circuit board 15 so that the position sensing element 1101 and the position sensing magnet 1102 are opposite each other, thereby improving the sensing accuracy of the position sensing element 1101.

[0134] In the present application, the first fixed sidewall 11 has a mounting groove 115. The position sensing element 1101 is disposed within the mounting groove 115 to electrically connect to the inner side of the flexible circuit board 15. The conductive member 33 is bent to the outer side of the flexible circuit board 15 to electrically connect to the flexible circuit board 15. Specifically, the mounting groove 115 is opened along a first direction and penetrates the first fixed sidewall 11 to accommodate the position sensing element 1101, so that the position sensing element 1101 is opposite to the position sensing magnet 1102. This prevents the installation of the position sensing assembly 110 from increasing the assembly tolerance between the movable portion 20 and the fixed portion 10, thereby preventing an increase in the overall width of the camera module.

[0135] At least a portion of the flexible circuit board 15 is correspondingly disposed outside the mounting groove 115 , further facilitating circuit conduction of the position sensing element 1101 .

[0136] It should be understood that if the conductive member 33 were to be conductively connected to the inner side of the flexible printed circuit board 15, on the one hand, the conductive member 33 could interfere with the position sensing element 1101, affecting the conductive connection between the position sensing element 1101 and the flexible printed circuit board 15. On the other hand, the conductive member 33 needs to be connected to the piezoelectric actuator 30 and soldered to the flexible printed circuit board 15. In other words, the conductive member 33 includes at least two connecting portions, one connecting the piezoelectric actuator 30 and the other connecting portion. The planes of the piezoelectric actuator 30 and the flexible printed circuit board 15 are perpendicular to each other, and the planes of the at least two connecting portions of the conductive member 33 are perpendicular to each other. In other words, the conductive member 33 needs to be bent before being soldered to the flexible printed circuit board 15. If the bending angle is too small, the conductive member 33 may be easily broken due to excessive bending. In addition, there is an extremely small assembly tolerance between the fixed part 10 and the movable part 20, that is, the gap between the first fixed side wall 11 and the first movable side wall 21 is very small, and the space available for the conductive part 33 to bend is extremely small. The conductive part 33 is subjected to greater stress at the bending point, increasing the risk of breakage during bending.

[0137] Therefore, in this application, the conductive member 33 is connected outside the flexible circuit board 15. This connection method can reduce the risk of excessive bending and breakage of the conductive member 33 within a limited space. It also simplifies the connection method between the conductive member 33 and the position sensing element 1101. By concentrating the connection between the conductive member 33 and the position sensing element 1101 on the flexible circuit board 15, and then connecting to other external components through the flexible circuit board 15, the circuit is simplified and the welding of the conductive member 33 and the flexible circuit board 15 is also more convenient. It can also make the structure of the drive device more compact.

[0138] In some embodiments, the flexible circuit board 15 includes a top close to the piezoelectric actuator 30 and a bottom away from the piezoelectric actuator 30. The conductive member 33 bends from the top of the piezoelectric actuator 30 and extends to the bottom of the flexible circuit board 15 so as to be welded and connected at the bottom of the flexible circuit board 15. By setting the welding point position of the conductive member 33 and the flexible circuit board 15, the number of bending times of the conductive member 33 is reduced, thereby simplifying the structure of the conductive member 33 and reducing the risk of breakage of the conductive member 33.

[0139] In some embodiments of the conductive member 33 of the present application, the conductive member 33 includes a main body 3301, an extension 3302, and a soldering portion 3303. The main body 3301 is located at the top of the piezoelectric actuator 30. The extension 3302 is bent along the second direction from the plane where the main body 3301 is located. The soldering portion 3303 is connected to the extension 3302 and is electrically connected to the bottom of the flexible circuit board 15. The plane where the main body 3301 is located is perpendicular to the plane where the flexible circuit board 15 is located. The plane where the extension 3302 is located is parallel to the plane where the flexible circuit board 15 is located. The second direction is perpendicular to the optical axis direction and the first direction. Figure 18 and Figure 19 As shown, the main body 3301 is located between the pre-pressed part 40 and the piezoelectric actuator 30, and is a horizontal plate extending along the XY interface. The extension part 3302 and the welding part 3303 are vertical plates extending from the outer surface of the first fixed side wall 11 of the fixed part 10. The horizontal plate and the vertical plate are connected through the bending area of ​​the extension part 3302, and the extended end of the vertical plate of the conductive part 33 is the welding part 3303, which is used to weld the flexible circuit board 15 located on the outside of the first fixed side wall 11, thereby increasing the space utilization inside the camera module and achieving electrical conductivity.

[0140] In some embodiments, the main body 3301 is located at the top of the piezoelectric active part 31 of the piezoelectric actuator 30, and the extension portion 3302 extends from both ends of the main body 3301 along the optical axis and then bends along a second direction. Because the two ends of the conductive member 33 are electrically connected to the piezoelectric active part 31 and the flexible circuit board 15 through the main body 3301 and the welding portion 3303, respectively, the main body 3301 will deform under the influence of the vibration of the piezoelectric active part 31, generating a reaction force, which in turn reversely affects the vibration of the piezoelectric active part 31. In the present application, the extension portion 3302 extends from both ends of the main body 3301 along the optical axis. Because the vibration of the piezoelectric active part 31 has a certain directionality and amplitude, the extension portion 3302 extends from both symmetrical sides of the main body 3301 to generate symmetrical reaction forces, thereby reducing the impact of the reaction force on the piezoelectric active part 31 and helping to maintain the stability of the vibration of the piezoelectric active part 31.

[0141] In the present application, the extension portion 3302 is bent from both ends of the main body portion 3301 along the optical axis direction toward the outer surface of the first fixed side wall 11 of the fixed portion 10 and extends along the second direction, so that the extension portion 3302 has a larger length along the second direction and a smaller width along the optical axis direction, so as to reduce the tensile force generated by the welding of the welding portion 3303 and the flexible circuit board 15, thereby reducing the influence of the reaction force on the piezoelectric active portion 31.

[0142] Specifically, the extension portion 3302 includes an integrally formed extension area 33021 and an extension leg 33022. The extension area 33021 extends from both ends of the main body 3301 in the optical axis direction, and then bends along the second direction to connect the extension leg 33022. The extension leg 33022 is connected to the welding portion 3303 at the bottom along the second direction. The main body 3301, the extension area 33021, the extension leg 33022 and the welding portion 3303 form an opening 3300 to ensure that the extension portion 3302 has sufficient length along the second direction and a smaller width along the optical axis direction, thereby further reducing the tensile force generated by the welding of the welding portion 3303 and the flexible circuit board 15, and reducing the influence of its reaction force on the piezoelectric active portion 31.

[0143] In addition, the above-mentioned method of welding at the bottom of the flexible circuit board 15 can increase the extension length of the extension leg 33022 after the conductive part 33 is bent. The lower the welding position of the flexible circuit board 15 and the welding portion 3303, the longer the length of the extension leg 33022 of the extension portion 3302, further reducing the tension generated by the welding of the welding portion 3303 and the flexible circuit board 15, thereby reducing the influence of its reaction force on the piezoelectric active portion 31, thereby ensuring the driving performance of the piezoelectric actuator 30.

[0144] like Figures 18 to 22 As shown, in the present application, the pre-press 40 includes a pre-press main body and a pre-press deformable body. The pre-press deformable body extends from both ends of the pre-press main body along the optical axis. Because the extension area 33021 of the extension portion 3302 of the conductive member 33 overlaps with the projection of the pre-press deformable body of the pre-press 40 along the second direction, when the extension area 33021 is high, the deformation of the pre-press deformable body and the deformation of the extension area 33021 may interfere with each other under the vibration of the piezoelectric active portion 31. The pre-press main body is implemented as the elastic portion 42 in the pre-press 40, and the pre-press deformable body is implemented as the bent portion 43 in the pre-press 40.

[0145] In some embodiments of the present application, along the second direction, the distance from the top surface of the main body 3301 of the conductive member 33 to the bottom surface of the pre-pressed member body is H1, and the distance from the top surface of the extension portion 3302 of the conductive member 33 to the bottom surface of the pre-pressed member deformation body is H2, H1≤H2, that is, the distance H2 from the top surface of the extension portion 3302 to the bottom surface of the pre-pressed member deformation body needs to be increased to avoid interference between the deformation of the pre-pressed member deformation body and the deformation of the conductive member 33 under the vibration of the piezoelectric active portion 31, thereby ensuring the driving effect of the piezoelectric actuator 30.

[0146] In some embodiments, a mounting portion 44 is provided between the pre-pressed component body and the main body portion 3301 of the conductive component 33 to increase the distance H1 from the top surface of the main body portion 3301 to the bottom surface of the pre-pressed component body. Figure 21 As shown, by raising the pre-pressed part 40 to increase H1, the distance between the pre-pressed part 40 and the conductive part 33 is increased, and the probability of interference between the conductive part 33 and the pre-pressed part deformation body is reduced, thereby ensuring the driving effect of the piezoelectric actuator 30.

[0147] In some embodiments, when the mounting portion 44 is provided, H1 may be equal to H2 as long as there is a deformation space between the pre-pressing member 40 and the conductive member 33 so as not to interfere with each other.

[0148] Furthermore, there is a height difference between the plane where the extension area 33021 of the extension portion 3302 is located and the plane where the main body portion 3301 is located, and the extension portion 3302 is connected to the main body portion 3301 through an inclined connection portion, such as Figure 23 As shown, a slope is formed from one end of the main body 3301 to the adjacent extension region 33021. This increases the height H2 and facilitates the connection between the conductive member 33 and the flexible circuit board 15. It should be understood that because the conductive member 33 and the flexible circuit board 15 are connected and electrically connected at the bottom of the camera module, the conductive member 33 is pulled during the welding process. This process presents some difficulty in maintaining the plane of the extension region 33021 of the conductive member 33 parallel to the plane of the main body 3301. Therefore, a height difference between the plane of the extension region 33021 and the plane of the main body 3301 facilitates assembly.

[0149] In some embodiments, as Figure 2 、 Figure 3 and Figure 11 As can be seen from the foregoing, the piezoelectric actuator 30 includes the piezoelectric active portion 31, the friction head 32, and the conductive member 33. The piezoelectric actuator 30 abuts against the movable portion 20 under the action of preload. Specifically, the friction head 32 is provided on the side of the piezoelectric active portion 31 facing the first movable sidewall 21. The piezoelectric active portion 31 generates mechanical resonant motion through the inverse piezoelectric effect. When the frequency of the applied voltage matches the natural frequency of the piezoelectric active portion 31, resonance occurs and ultrasonic waves are generated. Therefore, oscillatory reciprocating motion or elliptical motion can be achieved on the specifically configured electrode layer, thereby driving the friction head 32 to perform oscillatory reciprocating motion or elliptical motion. Furthermore, through friction between the friction head 32 and the first movable sidewall 21, the movable portion 20 is driven to slide relative to the fixed portion 10.

[0150] refer to Figure 2 、 Figure 3 and Figure 11 As can be seen, in some embodiments, the piezoelectric actuator 30 further includes a buffer member 34 disposed between the pre-compression member 40 and the piezoelectric active portion 31. Because the buffer member 34 has a lower elastic modulus than the pre-compression member 40, it is relatively easy to deform. This allows it to adaptively produce varying degrees of contraction deformation based on the varying tolerances within the piezoelectric actuator 30, thereby minimizing differences in the pre-compression forces between piezoelectric actuators 30 with varying tolerances. In other words, the deformable buffer member 34 can at least partially mitigate pre-compression force variations caused by material and assembly tolerances, and can also absorb some deformation of the piezoelectric active portion 31. The buffer member 34 can also absorb some vibrational deformation of the piezoelectric active portion 31, thereby maintaining its parallelism relative to the first movable sidewall 21 and further protecting the piezoelectric actuator 30 from excessive mechanical stress.

[0151] It is understandable that the buffer 34 can be a tape, the surface of one side of which is flatly bonded to the pre-pressed part 40, and the surface on the opposite side is bonded to the piezoelectric active part 31 or the parts below the piezoelectric active part 31. In addition, the tape is easy to install and use, does not require curing and has good flatness, which is conducive to maintaining the parallelism of the piezoelectric active part 31 relative to the first movable side wall 21. The size of the buffer 34 can be less than, equal to, or greater than the size of the piezoelectric active part 31, so that the buffer 34 fills the space between the piezoelectric active part 31 and the pre-pressed part 40. Similarly, the present application does not need to limit the specific shape and quantity of the buffer 34. For example, two pieces of tape can be stacked and used as the buffer 34, or two pieces of tape can be spaced apart along the second direction. And preferably, the size of the buffer member 34 is larger than the size of the piezoelectric active part 31, so that the area between the piezoelectric active part 31 and the pre-pressed part 40 is completely filled by the buffer member 34, which is beneficial to ensure the structural strength of the connection of the pre-pressed part 40 and enhance the installation parallelism provided to the piezoelectric active part 31.

[0152] Specifically, the buffer member 34 can also be a low-modulus adhesive applied to the surface of the piezoelectric active part 31. That is, because the buffer member 34 can be attached between the pre-press 40 and the circuit board, it not only facilitates assembly but also avoids the problem of affecting the vibration mode of the piezoelectric active part 31 after bonding the pre-press 40 with adhesives such as UV glue or thermosetting glue.

[0153] like Figure 2 、 Figure 3 and Figure 11It can be seen that in some embodiments, the piezoelectric active part 31 is a substrate that utilizes the inverse piezoelectric effect, which shrinks or expands according to changes in the polarization direction and the electric field direction. This effect means that when an electric field is applied in the polarization direction of the dielectric, the dielectric will produce mechanical deformation, thereby enabling the piezoelectric active part 31 to achieve polarization by applying an electric field in materials such as single crystals, polycrystalline ceramics, polymers, etc., thereby generating ultrasonic oscillations. This oscillation can produce a pendulum reciprocating motion or elliptical motion on a specifically set electrode layer, thereby driving the friction head 32 to perform corresponding movements. It can be understood that the friction force between the friction head 32 and the outer wall of the movable part 20 can drive the movable part 20 to move relative to the fixed part 10. Therefore, the driving force is actually the friction force between the friction head 32 and the movable part 20.

[0154] In one specific embodiment of the present application, the piezoelectric active portion 31 employs a multi-layer stacked structure. Specifically, the piezoelectric active portion 31 is composed of alternating ceramic layers and electrode layers stacked in the thickness direction in the order of ceramic layer, electrode layer, ceramic layer, electrode layer...ceramic layer, electrode layer, ceramic layer. Each electrode layer is located between two adjacent ceramic layers. When an electric field is applied between adjacent electrode layers, the ceramic layers undergo deformation, either elongating or contracting. By providing multiple electrode layers, the voltage required to drive the piezoelectric active portion 31 to perform bending vibration can be reduced. The number of electrode and ceramic layers provided can be selected based on specific needs. In other words, for example, the number of ceramic layers can be greater than or equal to the number of electrode layers. The ceramic layers are typically made of a material exhibiting a piezoelectric effect, such as PZT piezoelectric ceramics, while the electrode layers are made of a conductive material, such as copper, gold, silver, or a silver alloy. The multi-layer ceramic layers and electrode layers can be secured together through a ceramic co-firing process, whereby a layer of ceramic slurry is applied, followed by a layer of electrode slurry, and then the layers are heated and sintered together to form the stacked piezoelectric active portion 31. Furthermore, by supplying power to the multi-layer electrode layers, the multi-layer ceramic layers disposed between the multi-layer electrode layers can be polarized.

[0155] It can be understood that the side electrical connections in the camera module are connected to the positive voltage and negative voltage of the power supply, respectively, thereby providing at least one electrode layer with a positive voltage and at least one electrode layer with a negative voltage, respectively, thereby polarizing the multi-layer ceramic layers, and the polarized piezoelectric ceramics will automatically arrange into a piezoelectric direction, further generating a piezoelectric effect.

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

[0157] In some embodiments, the piezoelectric active portion 31 is rectangular in shape along the optical axis, wherein the friction head 32 is protruding from the side of the piezoelectric active portion 31 facing the movable portion 20 along the second direction. Specifically, there are two friction heads 32, spaced apart along the optical axis. It is understood that the piezoelectric actuator 30 drives the movable portion 20 to move along the optical axis. Compared to a single friction head 32 driving the movable portion 20, the presence of two friction heads 32 working together achieves a better effect of driving the movable portion 20 to perform long-stroke motion.

[0158] In some embodiments, the friction head 32 is made of a wear-resistant material, such as various high-hardness wear-resistant ceramic materials such as aluminum oxide, zirconium oxide, and silicon carbide ceramics, or highly wear-resistant metal materials, carbon fiber materials, or composite materials of ceramics, metal particles, and polymers. This improves the wear resistance of the friction head 32 while also helping to increase the friction between the movable portion 20 and the friction head 32, further enhancing the driving force provided by the piezoelectric actuator 30. Furthermore, due to its excellent wear resistance, it helps to extend the service life of the friction head 32. Furthermore, in some embodiments, the friction head 32 and the piezoelectric active portion 31 can be integral or detachable. The friction head 32 and the piezoelectric active portion 31 can be secured to the piezoelectric active portion 31 by bonding, snapping, nesting, welding, or fastener connection, ensuring surface contact between the two to ensure connection strength. At the same time, the friction head 32 can produce significant movement as the piezoelectric active portion 31 deforms.

[0159] In some embodiments, the piezoelectric active part 31 performs bending vibration along the second direction in a mode of one crest and one trough. Since the position of the friction head 32 can be matched with the mode of the piezoelectric active part 31, the friction head 32 can be set at the position of the crest and trough at the corresponding position. It can be understood that the shape of the friction head 32 can be a sphere, a hemisphere, a cuboid, a table, a cylinder, a semi-cylinder, etc. The number of friction heads 32 can be one or two or more. In the present application, there are no specific restrictions on the shape and number of the friction head 32, the shape of the piezoelectric active part 31, the electrode setting method, and the connection method between the friction head 32 and the piezoelectric active part 31.

[0160] In some embodiments, as Figure 3 As shown, the pressing block 50 includes a pressing beam 51 and a pressing arm 52. The pressing arm 52 extends from both ends of the pressing beam 51 along the second direction toward the fixing portion 10, so that the pressing block 50 is fixed in the first accommodating groove 112 of the fixing portion 10. There is a groove 500 between the pressing beam 51 and the pressing arm 52, and 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 pre-pressure provided.

[0161] In some embodiments, the first fixing sidewall 11 of the fixing portion 10 further includes a base extension 114 and a second mounting surface 1141. The second receiving groove 113 is formed between the base extension 114. The second mounting surface 1141 is located on the top surface of the base extension 114. The downward pressing fixing platform 521 of the pressing block 50 abuts the second mounting surface 1141. It is understood that the downward pressing arm 52 can be connected to the fixing portion 10, and the downward pressing fixing platform 521 of the pressing arm 52 and the second mounting surface 1141 of the fixing portion 10 can abut each other, further enhancing the stability and reliability of the pressing block 50. Because the downward pressing fixing platform 521 of the pressing arm 52 is located at different height planes, the groove 500 is formed to provide space for deformation of the pre-pressed member 40. Furthermore, by securing the pressing block 50 to the fixing portion 10, it can be adjusted during assembly, thereby reducing the risk of assembly inconsistencies.

[0162] The groove 500, first receiving groove 112, and second receiving groove 113 of the pressing block 50 are connected. The pre-compression member 40 and at least a portion of the movable portion 20 are clamped between the pressing block 50 and the fixed portion 10, and at least a portion of the pre-compression member 40 and the movable portion 20 are located within the space connected by the groove 500, the first receiving groove 112, and the second receiving groove 113. It should be understood that as the pressing block 50 is pressed downward further in the second direction, the pre-compression member 40 and at least a portion of the movable portion 20 are clamped more tightly, the deformation of the pre-compression member 40 is greater, and the pre-compression force generated by the pre-compression member 40 is greater. In other words, the pressing block 50 not only provides deformation space for the pre-compression member 40 and maintains its deformation, but also adjusts the amount of pre-compression force generated by the pre-compression member 40. For example, by moving the pressing beam 51 downward in the second direction toward the movable portion 20, the pressing block 50 is further pressed downward, thereby increasing the pre-compression force of the pre-compression member 40.

[0163] In some embodiments, as Figure 3 、 Figure 6 and Figure 16 As shown, when the pre-pressed member 40 is subjected to the support force provided by the first support portion 61, it undergoes an upwardly convex bending deformation and generates a pre-load force in the second direction downwardly, thereby applying a pre-load force in the second direction downwardly to the movable portion 20. This causes the friction head 32 in the piezoelectric actuator 30 to frictionally engage with the movable portion 20, further providing a stable driving force. It is understood that the relatively good flatness and consistency of the pre-pressed member 40 helps reduce its variation.

[0164] In some embodiments, the pre-compression member 40 is a deformable elastic member, which provides a pre-compression force after deformation to drive the movable portion 20 and the piezoelectric actuator 30 to maintain frictional contact. Therefore, under the action of the pre-compression force, the friction head 32 in the piezoelectric actuator 30 contacts the friction portion 22 of the movable portion 20 and generates friction, thereby driving the movable portion 20 to move. Specifically, Figure 5 As shown, the pre-pressed member 40 is a spring leaf with a bent structure. Under the downward pressure provided by the pressure block 50 and the supporting force provided by the first support portion 61, the spring leaf with a bent structure undergoes an upwardly convex bending deformation, thereby generating a downward pre-load. It is understood that due to the certain tolerances that occur during the assembly of the pre-pressed member 40, the spring leaf with a bent structure is less affected by tolerance fluctuations within a certain pre-load range, thereby providing a more consistent pre-load.

[0165] In some embodiments, as Figure 3 、 Figure 6 and Figure 16 As shown, the pre-compression member 40 includes a fixed end 41, an elastic portion 42, and a bent portion 43, wherein the bent portion 43 is disposed between the fixed end 41 and the elastic portion 42. The fixed end 41 is fixed to the pressure block 50, and the elastic portion 42 abuts against the piezoelectric active portion 31. It is understood that a hollow structure can also be provided in the elastic portion 42 and the bent portion 43 to further reduce the elastic coefficient, thereby helping to reduce the impact of material tolerance, assembly tolerance, or other displacement fluctuations on the pre-compression force.

[0166] Specifically, the distance between the top surface of the main body 3301 of the conductive part 33 and the bottom surface of the elastic part 42 is H1, and the distance between the top surface of the extension area 33021 of the extension part 3302 of the conductive part 33 and the bottom surface of the bending part 43 is H2. H1 is not greater than H2, so as to avoid deformation of the conductive part 33 due to the vibration of the piezoelectric active part 31, and ensure that there is no interference between the conductive part 33 and the deformed body of the pre-compression part 40, thereby ensuring the driving effect of the piezoelectric actuator 30.

[0167] Furthermore, when the pre-pressed member 40 is configured as a spring, Figure 5 As shown, the spring can be bent during manufacture to impart a certain degree of deformation. During assembly, after the spring is assembled with the piezoelectric actuator 30 and the pressure block 50, the spring's inherent deformation exerts a preload on the piezoelectric actuator 30 and the movable portion 20. In other words, pre-deforming the spring prior to subsequent assembly and fixation creates a greater preload on the movable portion 20, improving the driving effect.

[0168] In some embodiments, the pre-compression member 40 has a planar spring structure. It is understood that before the piezoelectric actuator 30 is driven, the deformation of the pre-compression member 40 is generated by the coordinated action of the pressure block 50 and the first support portion 61. The pre-compression member 40 includes a fixed end 41 and an elastic portion 42. The fixed end 41 is fixed to the pressure block 50, and the elastic portion 42 abuts against the piezoelectric active portion 31. When the pre-compression member 40 is subjected to the downward pressure of the pressure block 50 and the supporting force of the first support portion 61, the elastic portion 42 of the pre-compression member 40 will produce an upward convex bending deformation and generate a downward pre-compression force. The existence of the pre-compression force is conducive to maintaining frictional contact between the friction head 32 and the movable portion 20 to generate a stable friction force. The piezoelectric actuator 30 further drives the movable portion 20 to move, thereby enhancing the driving effect.

[0169] In some embodiments, as Figure 6 and Figure 16As 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. 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 along the second direction is smaller, resulting in a smaller deformation of the pre-pressed part 40 and further reducing the generated pre-pressure. 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 downward pressure, support force and pre-pressure, further causing damage to the piezoelectric actuator 30, and may also cause the first support part 61 to be subjected to excessive downward pressure and pre-pressure, resulting in excessive extrusion and the formation of 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 pre-pressing part 40 from being too small when the length of the lower pressure arm 52 along the second direction is too large, and the pre-pressure 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.

[0170] 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 a mounting post 524. The mounting post 524 protrudes from the first mounting plane 523 toward the fixed end 41 of the pre-pressed member 40, so that the fixed end 41 of the pre-pressed member 40 is fixed below the first mounting plane 523 via the mounting post 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 avoiding the phenomenon of inconsistent heights between the left and right sides of the pre-pressed member 40, thereby preventing the phenomenon of increasing the variation of the pre-pressed member 40 and providing inconsistent pre-pressure on the movable portion 20.

[0171] It is understood that the mounting posts 524 provided on both sides of the downward pressure mounting platform 522 correspond to the fixing holes 411 provided on the fixed end 41 of the pre-pressed part 40. Therefore, during assembly, the mounting posts 524 can extend into the fixing holes 411, thereby fixing the pre-pressed part 40 to the downward pressure mounting platform 522. Specifically, the mounting posts 524 can be directly riveted to the fixing holes 411 during fixation, or adhesive can be applied to the fixed end 41 of the pre-pressed part 40 and the surface of the downward pressure mounting platform 522 for pre-fixation, and then the mounting posts 524 can be riveted to the fixing holes 411. This further enhances the stability of the pre-pressed part 40 and the pressing block 50 during installation and use, which is conducive to maintaining the stability of the provided pre-pressure and downward pressure.

[0172] In some embodiments, the pre-press 40 can be first installed on the pressure block 50, and then the pressure block 50 can be flipped over to secure the lower pressure arm 52 to the first fixed side wall 11 of the fixed portion 10. This further optimizes the assembly process of the pre-press 40 and the pressure block 50, increases assembly efficiency, and reduces assembly difficulty. It should be understood that during the assembly process, the piezoelectric actuator 30 and the pre-press 40 are first assembled into a semi-finished product, and then the piezoelectric actuator 30 is carried by the pre-press 40 for the next assembly step. If the pre-press 40 is directly assembled on the fixed portion 10, it is necessary to ensure that the friction head 32 of the piezoelectric actuator 30 is aligned with the movable portion 20 at all times during the assembly process. Otherwise, the friction contact position between the friction head 32 and the movable portion 20 may shift after assembly, thereby affecting the driving effect. Furthermore, due to the characteristics of the pre-press 40, it is difficult to adjust the pre-press 40 during assembly. Compared with the above method, the pre-pressed part 40 is first installed on the pressure block 50, and the lower pressure arm 52 is fixed to the fixed part 10 after the pressure block 50 is flipped over. During the assembly process of the pre-pressed part 40, there is no need to always keep the position of the friction head 32 and the movable part 20 aligned, and the assembly difficulty is reduced. Moreover, after the pre-pressed part 40 is pressed on the pressure block 50, the position and assembly between the pressure block 50 and the fixed part 10 can be adjusted to achieve the adjustment of the pre-pressed part 40, and the adjustability is higher.

[0173] In some embodiments, the drive device further includes a drive control assembly for sensing and controlling the movement of the movable portion 20. This drive control assembly is positioned on the side of the movable portion 20 to effectively utilize the space within the camera module and enhance the compactness of the structure. Furthermore, the drive control assembly may include a Hall effect element, an integrated circuit driver (IC), a tunnel magnetoresistance (TMR), and the like.

[0174] In some embodiments of the present application, Figure 1As shown, the camera module further includes an optical system. Since the fixing part 10 is a frame, the optical system is assembled inside the fixing part 10. The optical system includes a light deflecting element 90, an optical lens 100 and a photosensitive component 80, which are sequentially distributed along the optical axis direction, wherein the optical lens 100 is arranged on the light deflecting path of the light deflecting element 90, and the photosensitive component 80 is used to receive the light transmitted from the optical lens 100 and perform imaging. Specifically, the light emitting direction of the light deflecting element 90, the axial direction of the optical lens 100 and the normal direction of the photosensitive component 80 are all arranged along the optical axis direction. The light deflecting element 90 is located on the side of the fixing part 10 close to the incident side of the light, the optical lens 100 is located in the central area of ​​the fixing part 10, and the photosensitive component 80 is located on the side of the fixing part 10 away from the incident side of the light. The camera module provided by the present application has the characteristics of easy assembly and good pre-pressure consistency within the camera module.

[0175] In some embodiments of the present application, the light deflecting element 90 has an incident surface and an exit surface, the incident surface and the exit surface intersect, and the light propagation direction of the light is changed by the light deflecting element 90 to fold the optical path. The optical lens 100 is through-hole along the optical axis and has a lens mounting hole. At least one optical lens is distributed in the lens mounting hole along the optical axis, thereby realizing the optical lens 100 to converge the light. After receiving the converged light, the photosensitive component 80 converts the received optical signal into an electrical signal for imaging processing. In some embodiments, the number of the optical lenses 100 can be two, wherein one of the two optical lenses 100 can be fixed, and the other optical lens 100 can be driven and moved along the optical axis to achieve optical focus and optical zoom functions. Of course, in this example, both optical lenses 100 can also be driven to move along the optical axis to achieve optical focus and optical zoom functions. Furthermore, the number of the optical lenses 100 can be three, wherein two of the three optical lenses 100 can be fixed, and the other optical lens 100 can be driven to move along the optical axis to achieve optical focus and optical zoom functions. Of course, in this example, one of the three optical lenses 100 can be fixed, and the other two optical lenses 100 can be driven to move along the optical axis to achieve optical focus and optical zoom functions. In other specific examples of the present application, the number of the optical lenses 100 can also be four, five, etc., and is not limited to the present application.

[0176] In some embodiments, the photosensitive component 80 is electrically connected to the flexible circuit board 15 and further includes a chip circuit board, a photosensitive chip, a filter element, and a filter element holder. The photosensitive chip is disposed on and connected to the chip circuit board. The filter element holder is located around the photosensitive chip and is disposed on the chip circuit board. The filter element holder and the chip circuit board may be integrally formed or have a separate structure. The filter element is mounted on the filter element holder to maintain the photosensitive path of the photosensitive chip and filter the imaging light entering the photosensitive chip.

[0177] This application can also provide a camera module, such as Figure 1 As shown, it includes: The drive device as above; A light deflection element 90 for deflecting incident light, The optical lens 100 is held on the light deflection path of the light deflection element 90; The photosensitive component 80 is electrically connected to the flexible circuit board 15 and is used to receive light from the optical lens 100.

[0178] This application also provides a method for assembling a camera module, such as Figures 12 to 15 As shown, it includes the steps of: S1. Provide a fixing portion 10; S2. Provide a movable portion 20 and install the movable portion 20 in the fixed portion 10. The movable portion 20 is used to support the optical lens 100. The optical lens 100 defines an optical axis. S3. Providing a piezoelectric actuator 30, a pre-pressed member 40, and a pressing block 50; assembling the piezoelectric actuator 30, the pre-pressed member 40, and the pressing block 50 to form a pre-pressed drive assembly, wherein the pre-pressed member 40 is disposed between the piezoelectric actuator 30 and the pressing block 50; the piezoelectric actuator 30 is mounted on the pre-pressed member 40; and the pressing block 50 is coupled to the pre-pressed member 40 and provides a preset deformable space for the pre-pressed member 40; S4. Install the preload drive assembly on the fixed part 10 in a direction perpendicular to the optical axis and place the drive assembly on top of the movable part 20, wherein the pressure block 50 is fixed to the fixed part 10, and the preload member 40 applies a preload perpendicular to the optical axis direction (i.e., the second direction) to the piezoelectric actuator 30. The piezoelectric actuator 30 and the movable part 20 abut against each other under the action of the preload, and the piezoelectric actuator 30 and the movable part 20 are in frictional contact.

[0179] By placing the piezoelectric actuator 30 on top of the movable portion 20, the support structure can be located solely at the bottom of the movable portion 20 for support. This eliminates the need for additional support structures on the top or sides of the movable portion 20, reducing the number of support structures required and enhancing assembly consistency and precision. Furthermore, since the assembly process proceeds layer by layer from bottom to top, the assembly process is simplified and tolerances are reduced.

[0180] In some embodiments, a camera module assembly method, step S1 further includes the following steps: S11 , providing a fixing portion 10 and a first magnetic member 71 , wherein the first magnetic member 71 is disposed on the fixing portion 10 .

[0181] In some embodiments, a camera module assembly method, step S2 further includes the following steps: S21, providing a second magnetic member 72, the second magnetic member 72 being disposed on the movable portion 20; S22. Provide a first support portion 61 and a second support portion 62, assemble the first support portion 61 in the first guide groove 111, and assemble the second support portion 62 in the first support groove 131. The second magnetic component 72 and the first magnetic component 71 are arranged relative to each other along the second direction and interact with each other to generate a magnetic force, and the magnetic force causes the movable portion 20 and the fixed portion 10 to clamp the first support portion 61 and the second support portion 62.

[0182] In some embodiments, a camera module assembly method, step S3 further includes the following steps: S31, first fix the pre-pressing member 40 and the piezoelectric actuator 30, and then couple the pre-pressing member 40 to the pressing block 50 to form a pre-pressing drive assembly. In this way, the pre-pressing member 40 can be assembled with the piezoelectric actuator 30 and the pressing block 50 together, reducing the assembly difficulty.

[0183] Specifically, in step S31, the pre-pressed piece 40 includes two fixed ends 41, an elastic portion 42 and two bent portions 43. The two bent portions 43 are respectively arranged between the two fixed ends 41 and the elastic portion 42 and respectively connect the elastic portion 42 and the two fixed ends 41. The pre-pressed piece 40 is fixed to the pressing block 50 through the two fixed ends 41, and the piezoelectric actuator 30 is installed on the pre-pressed piece 40 by being fixed to the elastic portion 42.

[0184] It is worth mentioning that in other embodiments of the present application, the pre-pressed member 40 and the pressing block 50 may also be fixed first in step S3. Specifically, step S3 includes: S31b, first couple the pre-pressing member 40 to the pressing block 50, and then install the piezoelectric actuator 30 on the pre-pressing member 40 to form a pre-pressing driving assembly.

[0185] Specifically, step S3 further includes the steps of: Step S31, assemble at least two of the support balls 601 arranged on the same side of the piezoelectric actuator 30 and at least one small ball 602 in the middle thereof into the first guide groove 111, and assemble at least one of the support balls 601 arranged on the opposite side of the piezoelectric actuator 30 into the first support groove 131.

[0186] Furthermore, in some embodiments, step S4 further includes the steps of: S41. Install the lower pressing arm 52 of the pressing block 50 on the fixed portion 10. The friction head 32 of the piezoelectric actuator 30 faces the first movable side wall 21 abutting against the movable portion 20. The pressing block 50 holds the first movable side wall 21 between the friction head 32 of the piezoelectric actuator 30 and the first supporting portion 61. The first supporting portion 61 provides a supporting force for the movable portion 20 along the second direction. S42 , the pre-pressing member 40 is deformed under the action of the pressing block 50 and the first supporting portion 61 , providing a pre-pressing force in the opposite direction of the supporting force and in the same direction as the downward force.

[0187] Specifically, in step S41 , the pressing block 50 is installed in the first receiving groove 112 of the fixing portion 10 .

[0188] Furthermore, after assembling the piezoelectric actuator 30, the pre-pressed part 40 and the pressing block 50, the pressing block 50 is assembled on the fixed part 10 to complete the assembly process, which can simplify the entire assembly process and further reduce the problems of tilting of the movable part 20 and poor assembly consistency of the camera module caused by assembly errors.

[0189] It should be understood that the above assembly method can also be applied to Figure 11 、 Figure 16-20 In the modified embodiment shown, further, in step S31 , the pre-pressed member 40 further includes a mounting portion 44 , which is fixed to the elastic portion 42 , so that the elastic portion 42 is fixed to the piezoelectric actuator 30 via the mounting portion 44 .

[0190] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments. The above embodiments and description merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements are intended to fall within the scope of the present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A driving device, characterized in that: include: The movable portion is used to carry the optical lens, wherein the optical lens defines an optical axis, and the movable portion includes a first movable side wall; a fixed portion, wherein the movable portion is movably disposed in the fixed portion, the fixed portion comprising a first fixed side wall, the first movable side wall being opposite to the first fixed side wall along a first direction perpendicular to the optical axis; A position sensing assembly, comprising a position sensing element and a position sensing magnet disposed opposite to each other along a first direction, wherein the position sensing magnet is disposed on the first movable side wall; 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 conductive member disposed on the top of the piezoelectric actuator and electrically connected to the piezoelectric actuator, wherein the conductive member is bent from the top of the piezoelectric actuator to the first fixed side wall; A flexible circuit board is disposed on the first fixed side wall. The position sensing element and at least a portion of the conductive member are respectively located on both sides of the flexible circuit board and are electrically connected to the flexible circuit board.

2. The driving device according to claim 1, wherein: The flexible circuit board includes an inner side and an outer side opposite to each other along a first direction, the first fixed side wall has a mounting groove, the position sensing element is arranged in the mounting groove to electrically connect to the inner side of the flexible circuit board, and the conductive member is bent to the outer side of the flexible circuit board to electrically connect to the flexible circuit board.

3. The driving device according to claim 1, wherein: The flexible circuit board includes a top portion close to the piezoelectric actuator and a bottom portion away from the piezoelectric actuator. The conductive member is bent from the top portion of the piezoelectric actuator and extends to the bottom portion of the flexible circuit board to provide conduction at the bottom portion of the flexible circuit board.

4. The driving device according to claim 3, wherein: The conductive part includes a main body, an extension and a welding part, the main body is located at the top of the piezoelectric actuator, the extension is bent along the second direction from the plane where the main body is located, the welding part is connected to the extension and is electrically connected to the bottom of the flexible circuit board, the plane where the main body is located is perpendicular to the plane where the flexible circuit board is located, and the plane where the extension is located is parallel to the plane where the flexible circuit board is located; wherein the second direction is perpendicular to the optical axis direction and the first direction.

5. The driving device according to claim 4, characterized in that The piezoelectric actuator includes a piezoelectric active part and a friction head connected to each other, and the friction head is in friction contact with the top of the first movable side wall; the main body is located on the top of the piezoelectric active part, and the extension part extends from both ends of the main body along the optical axis direction and then bends along the second direction.

6. The driving device according to claim 5, characterized in that The extension portion includes an extension area and an extension leg. The extension area extends from both ends of the main body along the optical axis direction, and then bends along the second direction to connect to the extension leg. The extension leg is connected to the welding portion at the bottom along the second direction. The main body, the extension area, the extension leg and the welding portion form an opening.

7. The driving device according to claim 4, characterized in that It also includes a pre-pressed part, which is arranged on the top of the piezoelectric actuator and applies a pre-pressure perpendicular to the optical axis direction to the movable part; the pre-pressed part includes a pre-pressed part main body and a pre-pressed part deformation body, and the pre-pressed part deformation body extends from both ends of the pre-pressed part main body along the optical axis direction; along the second direction, the distance from the top surface of the main body of the conductive part to the bottom surface of the pre-pressed part main body is H1, and the distance from the top surface of the extended part of the conductive part to the bottom surface of the pre-pressed part deformation body is H2, H1≤H2.

8. The driving device according to claim 4, wherein: There is a height difference between a plane where the extension portion is located and a plane where the main body portion is located, and the extension portion is connected to the main body portion via an inclined connecting portion.

9. The driving device according to claim 7, wherein: A mounting portion is provided between the pre-press body and the main body of the conductive member to increase a distance H1 from a top surface of the main body to a bottom surface of the pre-press body.

10. A camera module, characterized in that: include: The driving device according to any one of claims 1 to 9; 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; A photosensitive component is electrically connected to the flexible circuit board and is used to receive light from the optical lens.

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