Optical lens driving assembly

Abstract

The invention provides an optical lens assembly driven by a single-side coil, the optical lens driving assembly comprises an optical lens and a driving motor, the driving motor is used for driving the optical lens to move, the driving motor comprises a movable part, a fixed part and a driving part, the movable part is implemented as a lens carrier, the fixed part is implemented as a coil, and the driving part is implemented as a coil. The lens carrier extends downwards from one side to form a magnet mounting part, the fixing part is implemented as a base, the base comprises a base driving part and a base bearing part, the base bearing part is mainly used for bearing the optical lens, and the magnet mounting part on the lens carrier and the base driving part are located on the same side of the optical lens. It can be effectively ensured that the driving motor drives the optical lens to move.

Description

Optical lens drive assembly Technical Field

[0001] The present invention relates to a camera module driving structure, and in particular to an optical lens driving assembly. Background Art

[0002] With the increasing popularity of mobile electronic devices, the technology behind camera modules used in these devices to help users capture images (e.g., videos or pictures) has rapidly developed and advanced. Currently, in order to obtain clearer images, camera modules in mobile electronic devices (e.g., smartphones) require the optical lens to be moved along the optical axis to achieve focus.

[0003] To improve the imaging quality of camera modules, the original plastic lenses of optical lenses are replaced with glass lenses. This increases the weight of the optical lenses and requires greater driving force to move them. Existing drive motor structures have also been reduced in size to meet the trend of miniaturization of camera modules. How to reduce the size of the drive motor while increasing its driving force to meet the increased driving force of the optical lenses is a current issue that needs to be considered.

[0004] Furthermore, existing drive motors typically utilize structures such as balls or springs to assist in driving the optical lens. These structures are typically free within the drive motor, affecting the motor's control accuracy. Furthermore, during reliability verification, which involves multiple external impacts, free-standing balls or springs can increase the motor's performance variability, hindering subsequent operation.

[0005] Therefore, an optimized optical lens driving assembly is needed to solve some or most of the above problems.

[0006] Summary of the Invention

[0007] In response to the above problems, the present invention provides an optical lens driving assembly, which can solve the problem of insufficient driving force of the optical lens, ensure the reliability of the driving assembly, and also achieve miniaturization of the overall driving structure.

[0008] One object of the present invention is to provide an optical lens driving assembly, wherein the optical lens is a split optical lens, and a driving motor is used to drive part of the optical lens group to move to achieve a focusing function, so as to solve the problem of insufficient driving force of the driving motor.

[0009] Another object of the present invention is to provide an optical lens drive assembly, so that a drive motor drives part of the lens group to move, and utilizes the linkage effect of the drive motor and the optical lens to solve the problem of insufficient driving force of the optical lens while miniaturizing the drive motor.

[0010] Another object of the present invention is to provide an optical lens drive assembly, wherein the drive motor includes a precision guide rail structure, and the precision guide rail structure is respectively arranged on the movable part and the fixed part of the drive motor to assist in driving the optical lens to move. Due to the mechanical structure of the precision guide rail itself, the guiding accuracy of the drive motor can be effectively improved.

[0011] Another object of the present invention is to provide an optical lens driving assembly, by arranging an extension bracket on the outer shell of the driving motor, fixing the first lens group to the upper surface of the motor housing, and fixing the third lens head to the lower surface of the extension bracket, so that the fixed lens group is located on the same motor component, thereby reducing and improving the accuracy of lens assembly and simplifying the assembly process.

[0012] Another object of the present invention is to provide an optical lens drive assembly, which can prevent the lens carrier from excessive movement and damaging some components by providing an elastic buffer portion on the lens carrier. At the same time, due to the buffering effect of the buffer portion, the accuracy of the drive motor movement can be further improved.

[0013] Other advantages and features of the present invention will become apparent from the following description and may be realized by means of the instrumentalities and combinations particularly pointed out in the claims.

[0014] To achieve at least one of the above advantages, the present invention provides an optical lens driving assembly, comprising an optical lens and a driving motor, wherein:

[0015] The driving motor is used to drive the optical lens to move; and

[0016] The driving motor includes a movable portion, a fixed portion, and a driving portion. The movable portion can move relative to the fixed portion under the action of the driving portion. The driving portion includes a magnet and a coil. The movable portion can be implemented as a lens carrier. The side surface of the lens carrier extends downward to form a magnet mounting portion. The magnet is fixed to the magnet mounting portion. The characteristics are:

[0017] The fixing part is implemented as a base, which includes a base driving part and a base bearing part. The coil is arranged on the base driving part, and the base bearing part is used to mount the optical lens, wherein the magnet mounting part of the lens carrier and the base driving part are located on the same side of the optical lens, so that the magnet mounting part is confined to the inside of the coil.

[0018] In a specific embodiment of the present invention, the movable part and the fixed part are connected by a precision guide rail structure, which includes a movable guide rail and a fixed guide rail, wherein the movable guide rail is arranged on the magnet mounting part of the lens carrier, and the fixed guide rail is arranged on the base driving part corresponding to the magnet mounting part.

[0019] In a specific embodiment of the present invention, the movable guide rail has a guide ridge configured to extend along the optical axis, the fixed guide rail has a track groove configured to extend along the optical axis, and the guide ridge in the movable guide rail is nested in the track groove of the fixed guide rail.

[0020] In a specific embodiment of the present invention, the base driving portion has at least two extending columns extending upward, and the fixed guide rails are respectively arranged on the inner side surfaces of the extending columns.

[0021] In a specific embodiment of the present invention, the coil is arranged on the outer side of the extension column, and the coil can be wound around the extension column and in contact with the extension column, wherein the coil arranged on the extension column confines the magnet inside it.

[0022] In a specific embodiment of the present invention, the coil on the driving part is prefabricated to be mounted on the outer side of the extension column, and the magnet fixed on the magnet mounting part extends into the coil to interact with the coil to generate the driving force of the driving motor.

[0023] In a specific embodiment of the present invention, the base bearing portion and the base driving portion are integrally formed, and a coil avoidance position is provided at a position adjacent to the base bearing portion and the base driving portion, so that the coil at this position is adjacent to the third lens group accommodated in the bearing seat.

[0024] In a specific embodiment of the present invention, a protective latch is provided on at least one side wall of the lens carrier, and a latch groove is provided at a corresponding position of the base supporting seat corresponding to the protective latch, wherein the protective latch is accommodated in the latch groove, and the protective latch is restricted from moving within the latch groove.

[0025] In a specific embodiment of the present invention, the optical lens is a split optical lens, which includes a first lens group, a second lens group and a third lens group, wherein the second lens group is arranged on the lens carrier, and the second lens group and the third lens group are arranged on the fixing part.

[0026] In a specific embodiment of the present invention, the fixing portion further includes a shell, which is fixed to the base, and the shell includes an extension bracket and a shell body, the shell body is fixed to the first lens group, and the extension bracket is fixed to the third lens group, wherein the third lens group is fixed to the lower surface of the extension bracket.

[0027] In a specific embodiment of the present invention, the driving motor further includes a driving housing made of steel material, and an interaction force is generated between the driving housing and the magnet of the driving part, so that an adsorption force is generated between the housing and the magnet.

[0028] In a specific embodiment of the present invention, a plurality of avoidance grooves are provided on the light through hole of the lens carrier, and the avoidance grooves are formed by extending from the light through hole to the outside of the lens carrier, and the extension bracket on the outer shell is fixed to the third lens group through the avoidance grooves.

[0029] According to another aspect of the present invention, there is also provided an optical lens driving assembly, comprising an optical lens and a driving motor, wherein the driving motor is mainly used to drive the optical lens to move along its optical axis;

[0030] The drive motor includes a movable portion, a fixed portion, and at least one drive portion. The movable portion can move relative to the fixed portion under the action of the drive portion. The movable portion can be implemented as a lens carrier, and a side surface of the lens carrier extends downward to form a magnet mounting portion. The fixed portion is implemented as a base structure, characterized in that:

[0031] A movable guide rail is provided on the magnet mounting portion formed on the lens carrier, and a fixed guide rail is provided at a corresponding position of the base corresponding to the movable guide rail. The movable guide rail is limited by the fixed guide rail and moves along a fixed direction. The lens carrier moves relative to the fixed guide rail under the drive of the driving portion.

[0032] In a specific embodiment of the present invention, the movable guide rail has a guide ridge configured to extend along the optical axis, the fixed guide rail has a track groove configured to extend along the optical axis, and the guide ridge in the movable guide rail is nested in the track groove of the fixed guide rail.

[0033] In a specific embodiment of the present invention, the base has at least two upwardly extending extension columns at positions corresponding to the magnet mounting portion, and the inner side surfaces of the extension columns are connected to the fixed guide rail.

[0034] In a specific embodiment of the present invention, the driving part includes a magnet and a coil structure, the magnet is fixed on the magnet mounting part formed by the lens carrier, and the coil is arranged on the outer side surface of the extension column, wherein the magnet is accommodated between the two extension columns.

[0035] In a specific embodiment of the present invention, the optical lens is a split optical lens, including a first lens group, a second lens group and a third lens group, wherein the lens carrier is fixedly connected to the second lens group, and the base is fixedly connected to the first lens group and the third lens group, wherein the second lens group is arranged between the first lens group and the third lens group, and the driving part can drive the movable part to move relative to the fixed part.

[0036] In a specific embodiment of the present invention, the fixing portion further includes a shell having an extension bracket and a shell body, wherein the first lens group is arranged on the shell body, the third lens group is fixed to the lower end surface of the extension bracket, and an accommodating space is formed between the first lens group and the third lens group.

[0037] In a specific embodiment of the present invention, the coil on the driving part is prefabricated and fixed on the extension column on the base, and the magnet is accommodated inside the coil. The coil and the magnet in the driving part interact with each other to generate the force of the driving motor.

[0038] In a specific embodiment of the present invention, the lens carrier extends downward from one side to form a magnet mounting position, and extends downward from the other side of the lens carrier to form a protective latch position, wherein the number of the protective latch positions is at least two, which are evenly arranged on the side of the lens carrier.

[0039] In a specific embodiment of the present invention, the base implemented as a fixed part includes a base driving part and a base bearing part, and the base driving part and the base bearing part are arranged adjacent to each other, wherein the base driving part is mainly used to set the driving part of the driving motor, and the base bearing part is mainly used to accommodate the third lens group.

[0040] In a specific embodiment of the present invention, a coil avoidance position is provided at a position adjacent to the base bearing portion and the base driving portion, so that a side surface of the coil is provided adjacent to the third lens group.

[0041] In a specific embodiment of the present invention, a position sensing sensor mounting position is provided on the base driving portion, which is located directly below the magnet. The position sensing sensor is arranged on the mounting position of the position sensing sensor to sense the position of the lens carrier.

[0042] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and accompanying drawings.

[0043] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description, accompanying drawings and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and other objects, features, and advantages of the present invention will become more apparent through a more detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are provided to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and are not intended to limit the present invention. In the drawings, the same reference numerals generally represent the same components or steps.

[0045] FIG1 is a schematic diagram of the overall structure of the optical lens drive assembly of the present invention;

[0046] FIG2 is an exploded schematic diagram of the optical lens driving assembly of the present invention;

[0047] FIG3 is a cross-sectional schematic diagram of the optical lens driving assembly of the present invention;

[0048] FIG4 is an exploded schematic diagram of the third lens group and the fixing portion in the present invention;

[0049] FIG5 is a schematic structural diagram of the precision guide rail and the movable portion of the present invention;

[0050] FIG6 is a schematic structural diagram of the lens carrier and the buffer portion of the present invention;

[0051] FIG7 is a schematic structural diagram of the drive assembly without the housing in the present invention;

[0052] FIG8 is a cross-sectional view of the drive assembly according to the present invention taken along another angle;

[0053] FIG9 is a schematic structural diagram of the base in the present invention;

[0054] FIG10 is a schematic structural diagram of the assembled base and the third lens group according to the present invention. DETAILED DESCRIPTION

[0055] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0056] In order to improve the imaging quality of the camera module, the plastic lens in the optical lens is replaced with a glass lens. Although this can effectively improve the quality of the captured image, it will increase the weight of the optical lens, making the driving force provided by the original drive motor insufficient. Increasing the driving force of the drive motor itself will inevitably increase the size of the drive motor, which is not in line with the development trend of miniaturization of the camera module. Furthermore, the existing drive motor structure mainly uses structures such as balls or shrapnel to assist the movement of the optical lens to reduce the requirements for the driving force. However, during the reliability verification of the drive motor, the performance of structures such as balls or shrapnel is unstable, which not only reduces the adjustment accuracy of the drive motor, but also reduces the performance of the drive motor. How to increase the driving force of the motor to meet the requirements of the increased weight of the optical lens while improving some of the defects of the existing motor is a problem of general concern in the industry.

[0057] The present invention provides an optical lens drive assembly, which includes an optical lens 10 and a drive motor 20. The optical lens 10 and the drive motor 20 form a linkage, that is, a portion of the lens group of the optical lens 10 can move with the drive motor 20. Specifically, the optical lens 10 has an optical axis and includes multiple optical lens groups. Under the action of the drive motor 20, a portion of the lens group moves accordingly along the direction of the optical axis, while another portion of the lens group is fixed relative to the drive motor 20. The multiple lens groups of the optical lens together constitute an optical system capable of forming an image. When in operation, the drive motor 20 only needs to drive the movement of a portion of the lens group of the optical lens 10 to achieve focusing during the shooting process. By driving a portion of the lens group of the optical lens, while obtaining clear imaging, the problem of insufficient driving force of the drive motor can be effectively solved.

[0058] Furthermore, in a specific embodiment, the optical lens 10 may be implemented as three lens groups, including a first lens group 11, a second lens group 12, and a third lens group 13. The first lens group 11 includes a first lens group 111 and a first lens barrel 112, the second lens group 12 includes a second lens group 121 and a second lens barrel 122, and the third lens group 13 includes a third lens group 131 and a third lens barrel 132. The first lens group 111, the second lens group 121, and the third lens group 131 each contain at least one lens. The first lens group 11, the second lens group 12, and the third lens group 13 are sequentially arranged along the optical axis to form an image-forming optical system. The second lens group 12 can be driven by a drive motor 20 to move along the optical axis. The first lens group 11 and the third lens group 13 are fixed relative to the drive motor 20, i.e., the second lens group 12 is disposed between the first lens group 11 and the third lens group 13. There is a certain gap between the first lens group 11 and the third lens group 13 and the second lens group 12, so as to reserve space for adjusting the second lens group 12 in the optical axis direction.

[0059] The drive motor 20 provided in the present invention comprises a movable portion 21, a fixed portion 22, a drive portion 23, and a sensor portion 25. The movable portion 21 primarily supports a movable lens group. In this embodiment, the movable lens group is the second lens group 12. Specifically, the second lens group 12 is mounted on the movable portion 21, and the movable portion 21 drives the second lens group 12 to move along the optical axis. The fixed portion 22 is fixed relative to the movable portion 21 and is fixedly mounted to the first lens group 11 and the third lens group 13, providing mounting space for the first and third lens groups 11 and 13. The drive portion 23 primarily provides the driving force required for the movement of the movable portion 21. The guide structure 24 assists the movement of the movable portion 21, reducing friction between the movable portion 21 and the fixed portion 22 while effectively ensuring the accuracy of the movable portion 21's movement. The sensing portion 25 is disposed on the fixed portion 22 and corresponds to the position of the movable portion 21 , so as to detect the position of the movable portion 21 in real time and ensure the adjustment accuracy of the movable portion 21 .

[0060] The following detailed description of the structural features of the specific components that comprise the drive motor 20 of the present invention illustrates the beneficial effects of the drive motor 20 of the present invention. Furthermore, the movable portion 21 of the present invention is implemented as a lens carrier 211, which primarily supports the movable lens group of the optical lens 10. Specifically, the movable portion 21 primarily supports the second lens group 12, thereby driving the second lens group 12 to move along the optical axis. In a specific embodiment, the movable portion 21 is implemented as a lens carrier 211, which has a light hole 212 formed therein. The second lens group 12 is secured to the upper surface of the lens carrier 211. The second lens barrel 122 of the second lens group 12 is fixedly bonded to the lens carrier 212. The second lens group 121 of the second lens group 12 is positioned on the upper surface of the light hole 212, with the center of the second lens group 121 aligned with the center of the light hole 212 to ensure the passage of light.

[0061] Furthermore, the lens carrier 211 also has a guide rail mounting portion 213 and a magnet mounting portion 214. The lens carrier 211 extends downward from one side of its upper surface to form a magnet mounting portion 214. The magnet mounting portion 214 has at least one flat surface parallel to the optical axis. The two side edges of the magnet mounting portion 214 formed on the lens carrier 211, adjacent to the flat surface of the magnet mounting portion, respectively form guide rail mounting portions 213. The guide rail mounting portions 213 are parallel to the optical axis and are used to secure the guide rail to the lens carrier 211. At least one protective latch 215 is formed on the other peripheral edge of the upper surface of the lens carrier 211, namely, the other peripheral edge adjacent to the magnet mounting portion 214. The protective latch 215 extends downward from the main body of the lens carrier 211. One end of the protective stop 215 is fixed to the side of the lens carrier 211, while the other end is free. This free end of the protective stop 215 is spaced a certain distance from the upper surface of the lens carrier 211 to allow for movement of the lens carrier 211 along the optical axis. In one specific embodiment, at least two protective stops 215 extend downward from each side of the lens carrier 211. These stops 215 are evenly distributed along each side of the lens carrier 211, restricting movement of the lens carrier 211 in multiple directions.

[0062] To avoid unnecessary ambiguity, the side surface of the lens carrier in this article refers to a surface that is perpendicular to the upper surface of the lens carrier and is parallel to the optical axis.

[0063] Specifically, the driving portion 23 of the driving motor 20 is disposed on one side of the optical lens 10, that is, the optical lens 10 is disposed adjacent to the driving portion 23 of the driving motor 20. The movable portion 21 of the driving motor 20 is driven by the driving portion 23 to drive the movement of a portion of the lens group of the optical lens 10. In the present invention, the movable portion 21 of the driving motor 20 is implemented as a lens carrier 211. The lens carrier 211 has a mounting position for the second lens group 12 and a magnet mounting portion 214 of the driving portion 23. The lens carrier 211 has a light hole, and the second lens group 12 is disposed on the light hole. The optical axis of the second lens group 12 is aligned with the center of the light hole. The lens carrier 211 also has a magnet mounting portion 214, which is formed by extending downward from a side of the lens carrier 211 adjacent to the driving portion 23 of the driving motor 20. The magnet mounting portion 214 and the lens carrying portion are simultaneously arranged on the lens carrier 211. While ensuring that the lens carrier 211 better drives the second lens group 12 to move, the number of components of the driving motor 20 can also be reduced to achieve miniaturization of the overall structure.

[0064] In a specific embodiment, the magnet mounting portion 214 formed on the lens carrier 211 includes a planar structure and a vertical structure. The planar structure on the magnet mounting portion 214 is integrally extended outward from one end surface of the lens carrier 211. The vertical structure on the magnet mounting portion 214 is fixed directly below the extended planar structure. The planar structure and the vertical structure are arranged at a right angle. Specifically, the vertical structure is arranged in the middle position of the lower surface of the planar structure. The side of the lens carrier 211 on which the second lens group 12 is mounted is the upper surface, and the side away from the mounting position of the second lens group 12 is the lower surface. The vertical structure is arranged on the lower surface of the lens carrier 211. The planar structure and the vertical structure have the same length. The planar structure extending from the lens carrier 211 and the vertical structure fixed to the planar structure form a magnet mounting position 214. The magnet mounting position 214 has two mounting surfaces. One side of the vertical structure forms a first mounting position with the surface, while the other side of the vertical structure forms a second mounting position with the surface. The first and second mounting positions are adjacently arranged via the vertical structure. The first mounting position of the magnet mounting position 213 is located near the lens optical axis, while the second mounting position is located away from the lens optical axis.

[0065] In the present invention, the drive portion 23 of the drive motor 20 includes at least one magnet 231 and at least one coil 232. When the coil 232 is energized, the magnetic field generated around the coil 232 interacts with the magnetic field generated by the magnet 231, causing the magnet 231 to move relative to the coil 232. The coil 232 is longer than the magnet 231, confining the magnet 231 within the coil 231. This allows the coil 231 to generate a greater force against the magnet 232 when energized. In an alternative embodiment, the magnet 231 comprises two magnets with different magnetic properties or two magnets with opposite magnetic polarity directions, with the magnet having a first magnetic property or magnetization direction being positioned at the first mounting position, and the magnet having a second magnetic property or magnetization direction being positioned at the second mounting position. The magnet 232 of the drive portion 23 of the drive motor 20 is fixed to the magnet mounting position 213 formed by the lens carrier 221. In an optional embodiment, the side of the upper surface or lower surface of the lens carrier 211 that is relatively away from the magnet mounting portion 214 is the mounting portion of the second lens group 12. The magnet 213 and the second lens group 12 are simultaneously arranged on the lens carrier 211, which can enable the lens carrier 211 to respond more quickly to the movement of the magnet 231, thereby improving the adjustment accuracy of the second lens group 12.

[0066] As shown in FIG5 , in order to reduce the friction between the lens carrier 211 and the fixed portion 22 when the lens carrier 211 is moved relative to the fixed portion 22, the present invention provides a guide structure 24 for reducing the friction between the lens carrier 211 and the fixed portion 22. In a specific embodiment, the guide structure 24 is mainly implemented as a precision guide rail 241. The precision guide rail 241 includes a movable guide rail 2411 and a fixed guide rail 2422. The fixed guide rail 2422 has a track groove. The movable guide rail 2411 can be set in the track groove and move along the direction defined by the track groove. The precision guide rail 241 is mainly made of a material with low friction. The movable guide rail 2411 of the precision guide rail 241 is fixed to the lens carrier 211, and the fixed guide rail 2422 of the precision guide rail 241 is connected to the fixed portion 22. During the movement, due to the auxiliary effect of the precision guide rail 241, the friction between the lens carrier 211 and the fixing portion 22 is reduced, thereby reducing the driving force when the movable carrier 211 moves, thereby achieving miniaturization of the overall structure.

[0067] In another alternative embodiment, the precision guide rail 241 can be an integral component of the movable portion 21 and the fixed portion 22. Specifically, the movable portion 21, which in this embodiment is the lens carrier 211, has a movable guide rail 2411. The movable guide rail 2411 can be integrally formed with the lens carrier 211, or the formed movable guide rail 2411 can be fixed to the lens carrier 211 through a subsequent process. The fixed portion 22, which in this embodiment is the base 222, has a fixed guide rail 2412. The fixed guide rail 2412 can be integrally formed with the base 222, or the formed fixed guide rail 2412 can be fixed to the base 222 through a subsequent process. The movable guide rail 2411 has a guide ridge protruding along the optical axis, and the fixed guide rail 2412 has a track groove along the optical axis. The guide ridge on the movable guide rail 2411 is constrained to move within the guide groove formed in the fixed guide rail 2412. In another optional embodiment, the fixed guide rail 2412 is provided with a guide ridge along the optical axis, and the corresponding movable guide rail 2411 is provided with a guide groove along the optical axis, wherein the guide ridge on the movable guide rail 2411 is constrained to move within the track groove formed in the fixed guide rail 2412. The specific embodiment of the precision guide rail 241 can be selected according to the specific requirements of the drive motor. The present invention also has other embodiments of the precision guide rail 241, which will not be further described here.

[0068] Specifically, the magnet mounting portion 214 further includes a guide rail mounting position 213. The lens carrier 211 extends outwardly along its main body to form the magnet mounting portion 214, and the guide rail mounting position 213 is provided on the same side as the magnet mounting portion 214. In a specific embodiment, the guide rail mounting position 213 is provided as a plane perpendicular to the lens carrier 211. In the present invention, the plane on which the lens carrier 211 resides is referred to as a first plane. The first plane is perpendicular to the optical axis. The vertical structure fixed below the first plane and forming the first and second mounting positions with the first plane is referred to as a second plane. The second plane is parallel to the optical axis. The third plane extends downward from the lens carrier 211 and is provided to intersect with the second plane. The first, second, and third planes are perpendicular to each other. The second lens group 12 is fixed to the first plane. The magnet 231 on the drive unit 23 is fixed to the mounting position formed by the first and second planes. The movable rail mounting position 213 is located on the third plane perpendicular to the first and second planes. To accommodate the magnet 231 within the magnet mounting portion 214 formed by the first and second planes, the first and second planes are arranged in a "T" shape, that is, the magnet 231 is fixed within the mounting space formed by the first and second planes.

[0069] When the magnet 231 of the driving unit 23 is fixed to the magnet mounting portion 214, the side of the magnet 231 is flush with the side of the first plane extending from the lens carrier 211. This ensures the stability of the magnet 231 while effectively saving the space occupied by the magnet 231. Specifically, the guide rail mounting position 213 is provided on the third plane. There are two third planes, each extending downward from two side surfaces of the lens carrier 211 adjacent to the first plane. Each third plane has a guide rail mounting position 213. The movable guide rail 2411 of the precision guide rail 241 is fixed to the guide rail mounting position 213 to assist in the movement of the lens carrier 211. Furthermore, there are two guide rail mounting positions 213, which are respectively located at positions adjacent to the lens carrier 211 and the coil 232 on the fixing portion 22 to better assist the movement of the lens carrier 211. The guide rail mounting positions 213 are respectively arranged on two side surfaces adjacent to the lens carrier 211 and the extension column 2232 on the fixing seat 22, and the magnet 231 can be accommodated in the mounting space formed by the first plane and the second plane, while preventing the magnet 231 from generating magnetic interference to other components, further ensuring the collimation of the lens carrier 211 moving along the optical axis.

[0070] In a specific embodiment, the magnet mounting portion 214 extends along the optical axis and forms a magnet mounting position. The plane of the magnet mounting position is parallel to the optical axis, and at least one magnet is disposed at the magnet mounting position. The magnet mounting portion includes at least one movable guide rail mounting position 213. In some embodiments, the movable guide rail mounting position 213 is disposed on both sides of the magnet mounting position and extends along the optical axis. Correspondingly, at least one fixed guide rail mounting position 2235 is disposed on the base 222. The precision guide rail 241 includes a movable guide rail 2411 and a fixed guide rail 2412. The movable guide rail 2411 is disposed on the movable guide rail mounting position 213, and the fixed guide rail 2412 is disposed on the fixed guide rail mounting position 2235. In some optional embodiments, the movable guide rail 2411 is configured as a guide ridge extending along the optical axis, the fixed guide rail 2412 is configured as a guide groove extending along the optical axis, and the guide ridge in the movable guide rail 2411 is nested in the guide groove of the fixed guide rail 2412, so that the lens carrier 211 and the magnet mounting portion 214 provided on the lens carrier 211 can slide along the optical axis.

[0071] Furthermore, the upper surface of the lens carrier 211 is provided with a relief groove 216 and a buffer hole 217. The relief grooves 216 on the lens carrier 211 are interconnected with the light-through hole 212 and are evenly distributed within the light-through hole 212. The relief grooves 216 extend from the outer diameter of the light-through hole 212 and primarily serve to provide relief for the installation of the third lens group 13. In one specific embodiment, there are four relief grooves 216, evenly distributed throughout the light-through hole 212 of the lens carrier 211. The relief grooves 216 can be integrally formed with the light-through hole 212, i.e., corresponding positions for the relief grooves 216 are reserved during the molding process of the light-through hole 212. A buffer hole 217 is provided at a position corresponding to the avoidance groove 216. The buffer hole 217 forms a through hole on the lens carrier 211. The through hole can be set as a circular through hole. The number of the circular through holes can be multiple. Specifically, the number of the buffer holes 217 is consistent with the number of the avoidance grooves 216, and it is mainly used to install the buffer component of the drive motor 20.

[0072] Specifically, the lens carrier 211 is provided with mounting locations for multiple components. The lens carrier 211 is formed by stamping a mold. Therefore, to increase the strength of the lens carrier 211, a metal sheet can be embedded therein. The metal sheet can be integrally formed within the lens carrier 211. Specifically, the second lens group 12 is fixed to the upper surface of the lens carrier 211. The optical axis of the second lens group 12 is aligned with the center of the light hole 212 of the lens carrier 211. The diameter of the light hole 212 is greater than or equal to the light aperture of the second lens group 12. This ensures that light entering the second lens group 12 can completely pass through the light hole 212 of the lens carrier 211, thereby ensuring sufficient light for imaging.

[0073] In the present invention, the fixed portion 22 is in a fixed state during operation relative to the movable portion 21. The fixed portion 22 includes a housing 221 and a base 222. The housing 221 has a housing space disposed on the upper surface of the base 222, forming a housing space with the base 222 to accommodate the components of the drive motor 20 therein for protection. Furthermore, the base 222 is primarily used to accommodate the third lens group 13. The base 222 also has mounting locations for other components. To ensure the normal operation of the drive motor 20, the circuit structure of the drive motor 20 is disposed within the base 222. Specifically, the circuit structure of the drive motor 20 is molded within the base 222, which reduces the space occupied by the circuit structure while also ensuring the miniaturization of the overall structure.

[0074] Furthermore, the housing of the drive motor 20 includes an extension bracket 2211 and a housing body 2212. The extension bracket 2211 extends downward from the light-through hole in the housing 221 along the optical axis, and the extended portion is primarily used to secure the third lens group 13. One end of the extension bracket 2211 is secured to the housing body 2212, while the other end is free. One side of the free end has a flat surface, and the third lens group 13 is primarily secured to the flat surface of the extension bracket 2211, thereby securing the third lens group 13 to the extension bracket 2211. There are multiple extension brackets 2211, evenly spaced around the light-through hole in the housing. To ensure a stable connection between the extension brackets 2211 and the third lens group 13, in one embodiment, there are four extension brackets 2211, each positioned at the four corners of the drive motor 20. The extension bracket 2211 extends into the upper surface of the base 222 through the avoidance groove 216 on the lens carrier 211. The extension bracket 2211 is fixedly connected to the third lens group 13. The main material of the housing 221 is a steel plate, which has a certain hardness and can provide good protection for the components inside. Furthermore, the steel plate and the magnet can generate an interaction force, so that the housing 221 and the magnet 232 generate an attraction force, allowing the lens carrier 211 to move in a predetermined direction.

[0075] Specifically, the first lens group 11 is mounted on the upper surface of the housing body 2212 and secured thereto. Furthermore, after being secured, the optical axis of the first lens group 11 is aligned with the center of the optical aperture of the housing 221. The first lens group 11 is mounted on the upper surface of the housing 221, the third lens group 13 is secured to the lower end surface of the housing extension bracket 2211, and the movable lens group 12 is mounted on the lens carrier 211 of the drive motor 20. After being mounted and secured, the first lens group 11, the second lens group 12, and the third lens group 13 form an image-forming optical system. Because the first and third lens groups 11, 13 are mounted on the same component, namely the motor housing 221, this improves assembly accuracy of the first and third lens groups 11, 13. During subsequent reliability verification, the first and third lens groups 11, 13 can be synchronized to improve the performance of the drive motor 20. Specifically, the diameters of the first lens group 11 and the third lens group 13 are larger than the diameter of the second lens group 12, so that the second lens group 12 can move within the space formed by the first lens group 11 and the third lens group 13, while reducing the generation of stray light between the lens groups.

[0076] In the present invention, the base 222 mainly includes a base driving portion 223 and a base bearing portion 224. The base driving portion 223 is mainly used to install the driving portion 23 of the driving motor 20, wherein the driving portion 23 can be a magnetic coil structure, mainly used to provide the driving force required for the driving motor 20 to work. The base driving portion 223 and the base bearing portion 224 are arranged on the same plane. Specifically, the base driving portion 223 is arranged at a position adjacent to the base bearing portion 224, and the base driving portion 223 is arranged parallel to the base bearing portion 224. The base driving portion 223 and the base bearing portion 224 are arranged separately on the same plane, which can effectively reduce the height of the driving motor 20 and reserve a larger installation space for the driving portion 23 to ensure the stability of the driving motor 20.

[0077] In the present invention, the structure of the base 222 of the fixing portion 22 corresponds to that of the lens carrier 221. A magnet mounting portion 214 and a guide rail mounting position 213 are formed extending downwardly from one side of the lens carrier 211. The magnet 231 of the driving portion 23 and the movable guide rail 2411 of the precision guide rail 241 are disposed on one side of the lens carrier 211. The coil 232 of the driving portion 23 is disposed at a position on the base 222 corresponding to the position where the magnet 231 is mounted on the lens carrier 211. The coil 232 of the driving portion 23 houses the magnet 232 and the movable guide rail 2411 extending from the lens carrier 211 within the coil 232. The position on the base 222 corresponding to the movable guide rail 2411 is provided with a mounting position for the fixed guide rail 2412. One end of the fixed guide rail 2412 rests on the fixed guide rail mounting position 2235 on the base 222. The other side of the fixed guide rail 2412 has a rail groove, so that the movable guide rail 2411 fixed on the lens carrier 211 is accommodated in the rail groove of the fixed guide rail 2412, so that the movable guide rail 2411 slides relative to the fixed guide rail 2412.

[0078] In a specific embodiment, the base drive unit 223 includes a bottom support 2231, an extension column 2232, a coil mounting position 2233, a sensor mounting position 2234, and a fixed rail mounting portion 2235. The bottom support 2231 is part of the main body of the base 222 and has a recessed through-hole, which serves as the sensor mounting position 2234 and is primarily used to sense the position of the lens carrier 211. Extending from the upper surface of the bottom support 2231 are at least two extension columns 232, one end of which is fixed to the bottom support 2231 and the other end is free, with the free end being at a certain height from the bottom support 2231. The coil 232 of the driving part 23 is wound around the extension column 2232 to form a coil mounting position 2232 on the side of the extension column 2232. The coil 232 is wound around the coil mounting position 2232. Specifically, the coil 232 can be prefabricated and then sleeved on the coil mounting position 2233 to simplify the assembly process.

[0079] Furthermore, a receiving space is formed between the bottom supporting portion 2231 of the base driving portion 223, the two extending posts 2232 formed on the bottom supporting portion 2231, and the coil 232 wound around the extending posts 2232. This receiving space can be used to accommodate the magnet structure of the driving portion 23. Specifically, the magnet 231 is fixed to the magnet mounting portion 214 formed on the lens carrier 211. The magnet mounting portion 214 extends downward from a side surface of the lens carrier 211, and its extended portion forms a magnet mounting portion 214. The magnet 231 of the driving portion 23 is fixed to the magnet mounting portion 214, and the magnet mounting portion 214 with the magnet 231 mounted thereon is accommodated in the space.

[0080] Specifically, the magnet 231 structure, mounted on the magnet mounting portion 214, is housed within the space formed by the coil 231 of the drive unit 23 and the bottom support portion 2231 of the base drive unit 223. When the coil 232 is energized, the magnetic field generated by the current in the coil 232 interacts with the magnet 231 contained within the coil 232. Since the magnet 231 is fixed to the lens carrier 211, the force generated between the coil 232 and the magnet 231 drives the lens carrier 211 to move, thereby driving the second lens group 12 fixed to the lens carrier 211 to move. By controlling the current flowing into the coil 232, including its magnitude and direction, a driving force in a specific direction can be generated between the coil 232 and the magnet 231, causing the lens carrier 211 to move in a specific direction. In the present invention, the position of the second lens group 12 needs to be adjusted along the direction of the optical axis. A predetermined current is passed through the coil 231, so that the driving force generated between the coil 232 and the magnet 231 can drive the lens carrier 211 to move along the direction of the optical axis, and will also drive the second lens group 12 to move along the direction of the optical axis. The adjustment of the movement distance of the second lens group 12 can be achieved by controlling the magnitude of the current passed through the coil 232, which will not be described in detail here.

[0081] Furthermore, the base 222 of the present invention also includes a base support portion 224, which is primarily used to accommodate the third lens group 13. The base support portion 224 comprises a molded seat 2241, a buffer space 2242, a retaining groove 2243, a coil avoidance portion 2244, and a limiting post 2245. The molded seat 2241 integrally extends upward from the upper surface of the base support portion 224. A light aperture is defined in the molded seat 2241, the center of which aligns with the optical axis of the third lens group 13, allowing the third lens group 13 to be accommodated within the light aperture. The height of the molded seat 2241 is consistent with that of the third lens group 13, allowing the third lens group 13 to be fully accommodated within the light aperture formed by the molded seat 2241. This reduces the space occupied by the third lens group 13 and ensures the overall miniaturization of the drive motor 20. Among them, there are also multiple buffer spaces 2242 on the upper surface of the molding seat 2241. The buffer spaces 2242 are circular grooves formed inward from the upper surface of the molding seat 2241. They are mainly located at the four corners of the upper surface of the molding seat 2241. The number of the buffer spaces 2242 is consistent with the number of buffer pads. The buffer spaces 2242 are mainly used to accommodate the buffer part to prevent the lens carrier 211 from excessive movement in the optical axis direction.

[0082] Furthermore, the latching groove 2243 of the present invention is provided on the side of the mold base 2241, corresponding to the position of the protective latch 215 on the lens carrier 211. That is, the protective latch 215 extending from the lens carrier 211 is accommodated in the latching groove 2243 on the base supporting portion 224, and the shape of the latching groove 2243 is consistent with the shape of the protective latch 215. The protective latch 215 on the lens carrier 215 is integrally extended downward from the side of the lens carrier 211, and the corresponding latching groove 2243 is provided on the base supporting portion 224 at a corresponding position of the protective latch 215. The protective latch 215 is accommodated in the latching groove 2243 formed on the mold base 2241, thereby forming a corresponding restriction on the movement of the lens carrier 211. Among them, the height of the locking groove 2243 on the base supporting part 224 is greater than the height of the protective locking position 215 formed on the lens carrier 212, so that the protective locking position 215 is completely accommodated in the space formed by the locking groove 2243. While the protective locking position 215 protects the movement of the lens carrier 211, it also reserves space for the lens carrier 212 to be adjusted in the direction of the optical axis.

[0083] In the present invention, the base 222 includes the base drive portion 223 and the base support portion 224. The base drive portion 223 is disposed adjacent to the base support portion 224. A coil avoidance groove 2244 is provided on the base support portion 224 on a side adjacent to the base drive portion 223 and the base support portion 224. Specifically, the coil avoidance groove 2244 is provided on a side of the mold base 2241 adjacent to the base drive portion 223. It is primarily used to avoid the coil 232 disposed on the base drive portion 223. The coil 232 is primarily wound around the extension column 2232. The side of the coil 232 adjacent to the mold base 2241 allows the coil 232 to avoid the coil, thereby forming the coil avoidance groove 2244. In this avoidance position, the coil 232 is adjacent to the third lens group 13. The arrangement of the coil avoidance groove 2244 allows for full utilization of the space on the base 222 without interfering with the installation of the third lens group 13, thereby ensuring a compact overall structure. Corresponding limit posts 2245 are formed at the four corners of the upper surface of the mold base 2241. These limit posts 2245 extend integrally from the four corners of the mold base 2241 and protrude a certain height above the upper surface of the mold base 2241 to allow for movement of the lens carrier 211 and prevent excessive movement.

[0084] In the present invention, the magnet mounting portion 214 formed on the movable carrier 211 and the base driving portion 223 on the base 222 are arranged on the same side of the driving motor 20, and the supporting portion of the second lens group 12 on the movable carrier 211 and the base supporting portion 224 on the base 222 are arranged on the other side of the driving motor 20, so that the driving portion 23 of the optical lens driving assembly and the optical lens 10 of the optical lens driving assembly are arranged separately to ensure the stability of the imaging of the optical system. In a specific embodiment, the base driving portion 223 and the base supporting portion 224 on the base 222 of the driving motor 20 are integrated into the same structure. The base driving portion 223 and the base supporting portion 224 can be prefabricated using an injection molding process so that the two components can be formed as one piece, simplifying the assembly steps of the driving motor 20. The base supporting portion 224 has a light hole, the center of which is aligned with the center of the light hole 212 on the lens carrier 221, so that the optical axes of the third lens group 13 housed within the base supporting portion 224 and the second lens group 12 fixed to the lens carrier 221 are aligned. The first lens group 11 and the third lens group 13 are fixed to the housing 221, with the first lens group 11 being fixed to the upper surface of the housing 221 and the third lens group 13 being fixed to the extension bracket 2211 formed on the housing 221. Therefore, with the center of the light hole on the housing 221 as a reference, the optical axes of the assembled first lens group 11, the second lens group 12, and the third lens group 13 are aligned, facilitating assembly of the optical lens 10 while effectively improving the precision of the assembled optical lens 10.

[0085] Furthermore, the present invention also has a guide structure 24, which is a precision mechanical structure, mainly including a precision guide rail 241 and a buffer portion 242. The precision guide rail 241 is mainly arranged on the lens carrier 211. The precision guide rail 241 can be made of materials such as stainless steel or LCP plastic. In a preferred embodiment, in order to reduce the weight of the precision guide rail 241, LCP plastic is preferably used in the present invention. Specifically, the precision guide rail 231 is arranged on the guide rail mounting position 213 of the magnet mounting portion 214, and is mainly used to assist the movement of the lens carrier 211. The movement here mainly refers to movement along the optical axis. The precision guide rail 241 can ensure the straightness of the movement of the lens carrier 211 on the one hand, and can reduce the resistance of the lens carrier 211 during movement on the other hand, thereby reducing the driving force requirements of the drive motor 2. The buffer portion 242 is primarily used to protect the lens carrier 211, preventing it from excessive movement that could affect the adjustment accuracy of the second lens group 12. Specifically, the buffer portion 242 is made of an elastic material, allowing the second lens group 12 to return to its original position after movement under the action of its elastic force. In a specific embodiment, the buffer portion 242 can be implemented as a rubber cushion structure, which is disposed in the buffer hole 217 reserved on the lens carrier 211 to provide a corresponding buffering effect on the movement of the lens carrier 211.

[0086] The precision guide rail 241 and the buffer portion 242 are described in detail below. Specifically, in the present invention, the precision guide rail 241 includes a movable guide rail 2411 and a fixed guide rail 2412. The movable guide rail 2411 is mounted on the guide rail mounting portion 213 of the lens carrier 211 to drive the lens carrier 211 to move along the optical axis. The fixed guide rail 2412 is mounted on the base drive portion 223 of the base 222, specifically, on the fixed guide rail mounting portion 2235 of the base drive portion 223. The bottom surface of the fixed guide rail 2412 is fixed to the bottom support portion 2231, and one side surface of the fixed guide rail 2412 is fixed to the inner side surface of the extension column 2232 of the base drive portion 223. The fixed guide rail 2412 is fixed to the inner side surface of the extension column 2232 of the base drive portion 223, thereby being stably mounted on the base drive portion 223. The movable guide rail 2411 is mounted on the guide rail mounting portion 213 of the lens carrier 211. The movable guide rail 2411 is fixed to the side of the magnet mounting portion 214 extending from the lens carrier 211. Specifically, there are two movable guide rails 2411, one mounted on each of the two guide rail mounting portions 213 formed on the lens carrier 211. Corresponding to the number of movable guide rails 2411, there are also two fixed guide rails 2412, one mounted on each of the inner side surfaces of the extension column 2232, corresponding to the movable guide rails 2411.

[0087] Furthermore, the fixed guide rail 2412 has a track groove, which accommodates the movable guide rail 2411 within its track groove. Specifically, the precision guide rail 241 includes an operating state and a non-operating state. In the non-operating state, the movable guide rail 2411 is accommodated in the track groove of the fixed guide rail 2412. In the operating state, when the movable carrier 211 is subjected to an external force, the movable guide rails 2411 fixed on both sides of the movable carrier 211 move within the track groove of the fixed guide rail 2412, thereby driving the second lens group 12 fixed to the lens carrier 211 to move along the direction of the track groove of the fixed guide rail 2412. In the present invention, the direction of the track groove on the fixed guide rail 2412 is consistent with the direction of the optical axis of the optical lens 20, that is, the lens carrier 211, with the assistance of the precision guide rail 241, drives the second lens group 12 to move along the direction of the optical axis. Due to the action of the precision guide rail 241, the lens carrier 211 moves within the track groove defined by the fixed guide rail 2412, thereby ensuring the alignment of the second lens group 12 along the optical axis. Furthermore, the precision guide rail 241, through the cooperation between the movable guide rail 2411 and the fixed guide rail 2412, can effectively reduce the resistance of the movable carrier 211 when moving relative to the base 222, thereby reducing the driving force required. At the same time, through the cooperation between the movable guide rail 2411 and the fixed guide rail 2412, the movement of the lens carrier 211 can be more precisely controlled, thereby making the position of the second lens group 12 more accurately adjusted, thereby improving the imaging quality of the camera module.

[0088] In the present invention, the use of the precision guide rail 241 significantly reduces the driving force required. Compared to conventional drive motor structures, with the same driving force, the lens carrier 211 can be moved over a greater distance. Because the precision guide rail 241 increases the travel distance of the lens carrier 211, the present invention also provides a buffer 242 to prevent excessive movement of the lens carrier 211. The interaction between the buffer 242 and the precision guide rail 241 allows for more precise control of the travel distance of the lens carrier 211.

[0089] In a specific embodiment, the buffer portion 242 is disposed on the lens carrier 211. The lens carrier 211 has a plurality of buffer holes 217. The buffer holes 217 are disposed on the lens carrier 211. Specifically, the buffer holes 217 are disposed at the four corners of the lens carrier 211, adjacent to the avoidance groove 216 on the lens carrier 211. There are four buffer holes 217, and the number of the corresponding buffer portions 242 is also four. The buffer portion 242 is primarily made of an elastic material and is disposed within the four buffer holes 217 reserved on the lens carrier 211. Specifically, the buffer portion 242 is implemented as a cushion, including cushion A, cushion B, cushion C, and cushion D. The cushions (A, B, C, D) have the same shape and are implemented as cylindrical structures and fixed within the cushion holes 217.

[0090] Furthermore, the soft pads (A, B, C, D) have a certain height and can be compressed by an external force. When the external force is withdrawn, the soft pads (A, B, C, D) can return to their initial state. Furthermore, the soft pads (A, B, C, D) are fixed to the lens carrier 211 through the buffer hole 217 reserved on the lens carrier 211. One end of the soft pads (A, B, C, D) is a free end, which is adjacent to the inner surface of the housing 211. The other end of the soft pads (A, B, C, D) is set in the buffer space 2242 reserved on the base supporting portion 224, so that the other end of the soft pads (A, B, C, D) is partially accommodated within the buffer space 2242 to ensure the normal movement of the lens carrier 221. Among them, the other end of the soft pad (A, B, C, D) is not completely in contact with the buffer space 2242, and there is a certain gap between the two to reserve space for the lens carrier 221 to move, thereby preventing it from driving the second lens group 12 to move excessively and damaging other components in the drive motor 20.

[0091] To precisely control the movement of the second lens group 12, the present invention further provides a sensing unit 25. This sensing unit 25 is primarily used to sense the position of the movable portion 21. Specifically, in the present invention, this sensing unit 25 is primarily used to sense the position of the lens carrier 211. The second lens group 12 is fixed to the lens carrier 211. By sensing the position of the lens carrier 211, the position information of the second lens group 12 is fed back in real time. Specifically, the sensing unit 25 includes a position sensing sensor 251 and a position sensing magnet 252. The position sensing sensor 251 is mounted on a sensor mounting position 2234 reserved on the base drive unit 223 to sense the position information of the lens carrier 211. Correspondingly, the position sensing magnet 252 corresponds to the position where the position sensing sensor 251 is disposed. In the present invention, the position sensing magnet 252 and the magnet 231 on the driving unit 23 can be of the same structure. That is, the magnet on the driving unit 23 can provide both driving force for the lens carrier 211 and position information of the lens carrier 211. The position sensing sensor 251 is disposed below the magnet 231 of the driving unit 23. When the lens carrier 211 moves, the position sensing sensor 251 can detect the position information of the lens carrier 211 and feed it back to the control center of the driving motor 20 to adjust the position of the second lens group 12 in real time.

[0092] In the present invention, the magnet 231 that provides the driving force of the drive unit 23 and the position detection magnet 252 of the sensor unit 25 are configured as the same component, which can reduce the design difficulty of the sensor unit 25 of the drive motor 20. Furthermore, the magnet 231 of the drive unit 23 can simultaneously perform both driving and sensing functions, which can reduce the number of components used in the drive motor 20 itself, thereby further miniaturizing the overall structure. Specifically, because the second lens group 12 is fixed to the lens carrier 211, when the lens carrier 211 moves, it can drive the second lens group 12 to move synchronously. When the position sensing magnet 251 is fixed to the lens carrier 211, it senses the movement of the lens carrier 211, thereby sensing the position information of the second lens group 12. The base drive portion 223 is provided with a sensor mounting position 2234. The sensor mounting position 2234 is formed as a groove recessed inward from the bottom support position 2231. The position sensing sensor 251 is disposed within the groove, thereby reducing the height of the drive motor 20. The sensing portion 25 is primarily disposed on the side corresponding to the base drive portion 223. By sensing the position of the magnet 231 fixed to the lens carrier 211, the position of the second lens assembly 12 fixed to the lens carrier 211 is obtained.

[0093] In the present invention, by dividing the optical lens 10 into a first lens group 11, a second lens group 12, and a third lens group 13, the drive motor 20 drives some of the lens groups to move along the optical axis to achieve a focusing function. Specifically, the drive motor 20 drives the second lens group 12 to move along the optical axis, which can effectively solve the problem of insufficient driving force provided by the drive motor 20 due to the increased weight of the optical lens. By arranging the second lens group 12 on the lens carrier 211 of the drive motor 20, a linkage is generated between the drive motor 20 and the optical lens 10, and the position of the second lens group 12 can be adjusted. Furthermore, a precision guide rail 241 and a buffer portion 242 are provided on the lens carrier 211 of the driving motor 20. By fixing the movable guide rail 2411 of the precision guide rail 241 on the guide rail mounting portion 213 of the lens carrier 211 and fixing the fixed guide rail 2412 of the precision guide rail 241 on the fixed guide rail mounting portion 2235 of the base 222, the movable guide rail 2411 is confined in the guide rail groove of the fixed guide rail 2412.

[0094] In operation, when the drive unit 23 applies a force to the precision guide rail 241, the movable guide rail 2411 slides relative to the track groove of the fixed guide rail 2412, thereby driving the lens carrier 211 fixed to the movable guide rail 2411 to move, thereby adjusting the position of the second lens group 12 fixed to the lens carrier 211 along the optical axis to achieve focusing during shooting. At the same time, due to the high guiding precision of the precision guide rail 241, the adjustment accuracy of the lens carrier 211 is improved, especially the collimation of movement along the optical axis is increased, and the friction between the movable guide rail 2411 and the fixed guide rail 2412 is reduced, thereby increasing the adjustable travel of the second lens group 12 along the optical axis. Furthermore, due to the structural advantages of the precision guide rail 241 itself, the overall size of the drive motor 20 is reduced, and the precision guide rail has high load-bearing structure strength and strong resistance to reliability impact. During the reliability testing process, the drive motor 20 constructed by the precision guide rail 241 has a reduced degree of variation in the drive motor 20, further improving the performance of the drive motor 20.

[0095] Furthermore, in the present invention, the precision guide rails 241 reduce the frictional force of the lens carrier 211 moving along the optical axis. To prevent excessive movement of the second lens group 12 by the lens carrier 211 and damage to the lens elements, and to improve the adjustment accuracy of the second lens group 12 under the force of the drive unit 23, the present invention also provides a buffer 242. The buffer 242 is primarily made of an elastic material, preferably a rubber material. The cushion is cylindrical and fixed to the four corners of the lens carrier 211. This cushion can evenly distribute the force applied by the drive unit 23, thereby providing a corresponding buffering effect on the movement of the lens carrier 211. In a specific embodiment, there are four cushions, namely cushion A, cushion B, cushion C, and cushion D. The cushions (A, B, C, and D) are disposed in the buffer hole 217 of the lens carrier 211 to help distribute the driving force of the drive unit 23, allowing the second lens group 12 to move a predetermined distance.

[0096] In the present invention, through the mutual cooperation of the precision guide rail 241 and the buffer portion 242, not only can the collimation of the lens carrier 211 moving along the optical axis be guaranteed, but the size of the drive motor 20 can also be reduced, while further improving the adjustment accuracy of the drive motor 20, thereby improving the imaging quality of the camera module. The first lens group 11 and the third lens group 13 are fixedly arranged on the fixed portion 22 of the drive motor 20, and the second lens group 12 is connected to the movable portion 21 of the drive motor 20, so that the second lens group 12 moves to a position between the first lens group 11 and the third lens group 13, thereby providing corresponding protection for the second lens group 12.

[0097] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An optical lens drive assembly, comprising an optical lens and a drive motor, wherein: The driving motor is used to drive the optical lens to move; as well as The driving motor includes a movable portion, a fixed portion, and a driving portion. The movable portion can move relative to the fixed portion under the action of the driving portion. The driving portion includes a magnet and a coil. The movable portion can be implemented as a lens carrier. The side surface of the lens carrier extends downward to form a magnet mounting portion. The magnet is fixed to the magnet mounting portion. The characteristics are: The fixing part is implemented as a base, which includes a base driving part and a base bearing part. The coil is arranged on the base driving part, and the base bearing part is used to mount the optical lens, wherein the magnet mounting part of the lens carrier and the base driving part are located on the same side of the optical lens, so that the magnet mounting part is confined to the inside of the coil.

2. The optical lens driving assembly according to claim 1, wherein: The movable part and the fixed part are connected by a precision guide rail structure, which includes a movable guide rail and a fixed guide rail, wherein the movable guide rail is arranged on the magnet mounting part of the lens carrier, and the fixed guide rail is arranged on the base driving part corresponding to the magnet mounting part.

3. The optical lens driving assembly according to claim 2, wherein: The movable guide rail has a guide ridge configured to extend along the optical axis direction, the fixed guide rail has a track groove configured to extend along the optical axis direction, and the guide ridge in the movable guide rail is nested in the track groove of the fixed guide rail.

4. The optical lens driving assembly according to claim 1, wherein: The base driving part is provided with at least two extending columns extending upward, and the fixed guide rails are respectively arranged on the inner side surfaces of the extending columns.

5. The optical lens driving assembly according to claim 4, wherein: The coil is disposed on the outer side of the extension column. The coil can be wound around the extension column and contact the extension column, wherein the coil disposed on the extension column confines the magnet inside the coil.

6. The optical lens driving assembly according to claim 4, wherein: The coil on the driving part is prefabricated to be sleeved on the outer side of the extension column, and the magnet fixed on the magnet mounting part extends into the coil to interact with the coil to generate the driving force of the driving motor.

7. The optical lens driving assembly according to any one of claims 2 to 5, wherein: The base bearing portion and the base driving portion are integrally formed. A coil avoidance position is provided at a position adjacent to the base bearing portion and the base driving portion, so that the coil at this position is adjacent to the third lens group accommodated in the bearing seat.

8. The optical lens driving assembly according to claim 7, wherein: At least one side wall of the lens carrier is provided with a protective latch, and a latch groove is provided at a corresponding position of the base supporting seat corresponding to the protective latch, wherein the protective latch is accommodated in the latch groove and is restricted from moving in the latch groove.

9. The optical lens driving assembly according to claim 1, wherein: The optical lens is a split optical lens, which includes a first lens group, a second lens group and a third lens group, wherein the second lens group is arranged on the lens carrier, and the second lens group and the third lens group are arranged on the fixing part.

10. The optical lens driving assembly according to claim 9, wherein: The fixing part also includes a shell, which is fixed to the base. The shell includes an extension bracket and a shell body. The shell body is fixed to the first lens group, and the extension bracket is fixed to the third lens group, wherein the third lens group is fixed to the lower surface of the extension bracket.

11. The optical lens driving assembly according to claim 1, wherein: The driving motor further includes a driving shell made of steel material. The driving shell generates an interaction force with the magnet of the driving part, so that an adsorption force is generated between the shell and the magnet.

12. The optical lens driving assembly according to claim 9, wherein: A plurality of avoidance grooves are provided on the light through hole of the lens carrier. The avoidance grooves are formed by extending from the light through hole to the outside of the lens carrier. The extension bracket on the housing is fixed to the third lens group through the avoidance grooves.

13. An optical lens drive assembly, comprising an optical lens and a drive motor, wherein the drive motor is mainly used to drive the optical lens to move along its optical axis; The driving motor includes a movable part, a fixed part and at least one driving part. The movable part can move relative to the fixed part under the action of the driving part, wherein: The movable part can be implemented as a lens carrier, and a side surface of the lens carrier extends downward to form a magnet mounting part, and the fixed part is implemented It is a base structure, characterized by: A movable guide rail is provided on the magnet mounting portion formed on the lens carrier, and a fixed guide rail is provided at a corresponding position of the base corresponding to the movable guide rail. The movable guide rail is limited by the fixed guide rail and moves along a fixed direction. The lens carrier moves relative to the fixed guide rail under the drive of the driving portion.

14. The optical lens driving assembly according to claim 13, wherein: The movable guide rail has a guide ridge configured to extend along the optical axis direction, the fixed guide rail has a track groove configured to extend along the optical axis direction, and the guide ridge in the movable guide rail is nested in the track groove of the fixed guide rail.

15. The optical lens driving assembly according to claim 14, wherein: The base has at least two extending columns extending upward at positions corresponding to the magnet mounting portion, and the inner side surfaces of the extending columns are connected to the fixed guide rail.

16. The optical lens driving assembly according to claim 15, wherein: The driving part includes a magnet and a coil structure, the magnet is fixed on the magnet mounting part formed by the lens carrier, and the coil is arranged on the outer side surface of the extension column, wherein the magnet is accommodated between the two extension columns.

17. The optical lens driving assembly according to claim 14, wherein: The optical lens is a split optical lens, including a first lens group, a second lens group and a third lens group, wherein the lens carrier is fixedly connected to the second lens group, and the base is fixedly connected to the first lens group and the third lens group, wherein the second lens group is arranged between the first lens group and the third lens group, and the driving part can drive the movable part to move relative to the fixed part.

18. The optical lens driving assembly according to claim 16, wherein: The fixing part also includes a shell having an extension bracket and a shell body, wherein the first lens group is arranged on the shell body, the third lens group is fixed to the lower end surface of the extension bracket, and a accommodating space is formed between the first lens group and the third lens group.

19. The optical lens driving assembly according to any one of claims 13 to 18, wherein: The coil on the driving part is prefabricated and fixed on the extension column on the base. The magnet is accommodated inside the coil. The coil and the magnet in the driving part interact with each other to generate the force of the driving motor.

20. The optical lens driving assembly according to claim 16, wherein: The lens carrier extends downward from one side to form a magnet mounting position, and extends downward from the other side of the lens carrier to form a protective latch position, wherein the number of the protective latch positions is at least two and they are evenly arranged on the side of the lens carrier.

21. The optical lens driving assembly according to claim 20, wherein: The base implemented as a fixed part includes a base driving part and a base bearing part, and the base driving part and the base bearing part are arranged adjacent to each other, wherein the base driving part is mainly used to set the driving part of the driving motor, and the base bearing part is mainly used to accommodate the third lens group.

22. The optical lens driving assembly according to claim 21, wherein: A coil avoidance position is provided at a position adjacent to the base bearing portion and the base driving portion, so that one side surface of the coil is provided adjacent to the third lens group.

23. The optical lens driving assembly according to claim 21, wherein: A position sensing sensor mounting position is provided on the base driving portion and is located directly below the magnet. The position sensing sensor is provided on the mounting position of the position sensing sensor to sense the position of the lens carrier.

Images