A three-axis decoupled independent anti-shake camera motor

Abstract

This invention relates to the field of camera equipment technology, and discloses a three-axis decoupled independent image stabilization camera motor, solving the problems of horizontal motion coupling, unstable lens travel, and susceptibility to unexpected shaking in existing image stabilization motors. It includes a lens assembly, a focusing module, an image stabilization mechanism, and a drive control module. The lens assembly includes a lens and a carrier. The image stabilization mechanism includes a lower outer support and an upper inner support, with the upper part of the inner support serving as a carrier for fixing the lens. Several longitudinal grooves are provided between the outer and inner supports, each containing a matching and rotatable longitudinal sliding shaft. Several transverse grooves are provided between the inner support and the carrier, each containing a matching and rotatable transverse sliding shaft. The focusing module is located outside the image stabilization mechanism. This invention significantly improves the stability and accuracy of image stabilization, effectively eliminates unexpected shaking, and significantly improves image quality, making it suitable for various high-definition camera modules.

Description

Technical Field

[0001] This invention relates to the field of camera equipment technology, specifically to a three-axis decoupled independent image stabilization camera motor. Background Technology

[0002] With the rapid development of consumer electronics products such as smartphones, smart wearable devices, and tablets towards higher definition and thinner designs, users' demands for shooting experiences are increasing, and optical image stabilization has become a standard feature in mid-to-high-end camera equipment. As the core component for achieving optical image stabilization, the performance of the camera's image stabilization motor directly determines the accuracy and effectiveness of shake compensation during shooting.

[0003] In existing technologies, the image stabilization structure of a camera motor typically consists of a set of brackets and several movable support components. A drive source moves this set of brackets in both left-right and forward-backward directions to compensate for hand tremors during shooting, achieving a clear image. However, this structure requires controlling the same set of movable support components to move in two perpendicular directions during image stabilization. The forward-backward and left-right movements are coupled and prone to interference, causing instability in the lens's travel during movement. This easily leads to unexpected tilting, shifting, or shaking, resulting in problems such as blurred image edges and geometric distortion, severely affecting shooting quality and failing to meet the stringent image stabilization accuracy requirements of current high-pixel, high-frame-rate camera devices. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a three-axis decoupled independent image stabilization camera motor that eliminates motion interference, improves the stability and accuracy of image stabilization, effectively eliminates unexpected shaking, and significantly improves image quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a three-axis decoupled independent image stabilization camera motor, comprising a lens assembly, a focusing module, an image stabilization mechanism, and a drive control module; the lens assembly includes a lens and a carrier for fixing and supporting the lens; the image stabilization mechanism includes a lower outer bracket and an upper inner bracket, the upper part of which serves as the carrier for fixing the lens; a plurality of longitudinal sliding grooves are provided between the outer bracket and the inner bracket, each longitudinal sliding groove containing a matching and rotatable longitudinal sliding shaft, allowing the inner bracket and its upper carrier to slide independently longitudinally relative to the outer bracket under the control of the drive control module; a plurality of transverse sliding grooves are provided between the inner bracket and the carrier, each transverse sliding groove containing a matching and rotatable transverse sliding shaft, allowing the carrier to slide independently transversely relative to the inner bracket under the control of the drive control module; the focusing module is located outside the image stabilization mechanism, and the drive control module drives the carrier and the image stabilization mechanism as a whole to move independently in the vertical direction via the focusing module to achieve automatic focusing.

[0006] The working principle of this technical solution is as follows: by constructing a core architecture of a three-axis decoupled image stabilization motor, a three-layered sliding structure consisting of an outer support, an inner support, and a carrier is adopted to achieve completely independent decoupling of the three axes of motion (forward / backward, left / right, and up / down). Vertical sliding is achieved by the inner support relative to the outer support, horizontal sliding is achieved by the carrier relative to the inner support, and vertical focusing is achieved by the overall vertical movement of the image stabilization mechanism. The three axes of motion do not interfere with each other, fundamentally solving the motion interference problem of traditional coupled structures and making the lens movement more stable.

[0007] To better realize the present invention, the longitudinal slide groove and the transverse slide groove are perpendicular to each other, and both the longitudinal slide groove and the transverse slide groove include at least one guide groove and at least one open groove. The contact area between the guide groove and the longitudinal slide shaft or the transverse slide shaft is greater than the contact area between the open groove and the longitudinal slide shaft or the transverse slide shaft.

[0008] To better realize the present invention, four longitudinal and four transverse sliding grooves are provided, distributed at the four corners of the outer support, the inner support, and the carrier. Each of the four longitudinal and four transverse sliding grooves consists of two open grooves and two guide grooves, which are arranged alternately at intervals.

[0009] To better realize the present invention, the guide groove is further defined as a V-shaped structure, with the two sidewalls of the guide groove forming line contact with the outer circumferential surface of the longitudinal or transverse sliding shaft; the open groove is defined as a trapezoidal structure, with the bottom surface of the open groove forming line contact with the outer circumferential surface of the longitudinal or transverse sliding shaft.

[0010] To better realize the present invention, the anti-shake mechanism further includes X-magnets and Y-magnets that are fixedly installed at 90° vertically on the outer wall of the carrier. Metal parts that can be attracted by the magnets are embedded in both the inner and outer supports. The magnetic attraction between the metal parts and the X-magnets and Y-magnets presses the longitudinal or transverse sliding shafts into the corresponding longitudinal or transverse sliding grooves respectively.

[0011] To better realize the present invention, the focusing module further includes at least two sets of ball bearing assemblies, the difference in the number of balls in the two sets of ball bearing assemblies is not less than 2, and the diameters of two adjacent balls in the same set of ball bearing assemblies are different, while the diameters of balls spaced one position apart are the same; the inner wall of the base and the outer wall of the image stabilization mechanism are respectively provided with trapezoidal ball bearing grooves matching the number of sets of ball bearing assemblies, and each set of ball bearing assemblies is placed in the matching ball bearing groove; a magnetic suction plate is also installed on the outside of the ball bearing groove, and the magnetic suction plate generates a preload force to press the balls into the trapezoidal groove; an AF-magnet is installed on the outer bracket directly opposite the outside of the magnetic suction plate, and the drive control module drives the AF-magnet, thereby realizing automatic focusing by allowing the carrier and the image stabilization mechanism to move independently in the vertical direction.

[0012] To better realize the present invention, the number of ball bearing assemblies is further divided into two sets, one set of ball bearing assemblies containing one ball bearing and the other set of ball bearing assemblies containing three balls bearing, wherein the diameter of the middle ball bearing is smaller than the diameter of the upper and lower ball bearings, forming an asymmetrical support layout; the number of ball bearing grooves is divided into two sets, wherein a limiting mechanism is provided on the upper part of the ball bearing groove in which one ball bearing is placed, and the angle between the limiting mechanism and the bottom of the ball bearing groove is 15°~45°.

[0013] To better realize the present invention, the drive control module further includes a flexible circuit board fixedly installed on the inner wall of the base. One end of the flexible circuit board extends out of the housing from the lead-out slot on the side of the base and is electrically connected to the external motherboard. An AF drive unit, an X-axis drive unit, and a Y-axis drive unit are integrated on the flexible circuit board. The AF drive unit is arranged to cooperate with the focusing module. The X-axis drive unit and the Y-axis drive unit are respectively arranged to cooperate with the X-magnet and Y-magnet of the image stabilization mechanism. The AF drive unit includes an AF coil corresponding to the AF magnet, and an AF IC installed in the middle of the AF coil. The AF IC detects the magnetic field of the AF magnet and controls the carrier and the image stabilization mechanism as a whole to move in the vertical direction through the focusing module to adjust the autofocus accuracy. The X-axis drive unit includes an X-coil corresponding to the X-magnet and a Y-IC installed in the middle of the X-coil. The Y-IC detects the magnetic field of the Y-magnet and controls the carrier to move left and right through the anti-shake mechanism to achieve lateral anti-shake accuracy adjustment. The Y-axis drive unit includes a Y-coil corresponding to the Y-magnet and an X-IC installed in the middle of the Y-coil. The X-IC detects the magnetic field of the X-magnet and controls the carrier to move in the forward and backward directions through the anti-shake mechanism to achieve longitudinal anti-shake accuracy adjustment.

[0014] To better realize the present invention, the AF-coil, X-coil and Y-coil are all soldered on a flexible circuit board, and the size of the AF-magnet, X-magnet and Y-magnet is smaller than the size of the corresponding AF-coil, X-coil and Y-coil, respectively.

[0015] To better realize the present invention, the lens assembly further includes a top cover, the lower edge of which is provided with a plurality of pins, and the upper edge of the outer bracket is provided with a support column that matches the number and position of the pins on the lower part of the top cover. The support column is provided with a pin groove that matches the pins. The top cover is fixedly installed on the upper end face of the carrier by the cooperation of the pins and the pin groove, thereby locking the lens axis on the carrier.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) The present invention adopts a three-layer sliding structure consisting of an outer support, an inner support, and a carrier. The lateral movement is achieved independently by the carrier relative to the inner support, the longitudinal movement is achieved independently by the inner support relative to the outer support, and the up and down focusing movement is achieved by the image stabilization mechanism relative to the base. The three-axis movements are completely decoupled and do not interfere with each other, which fundamentally solves the motion interference problem of the traditional coupled structure, making the lens movement more stable and effectively eliminating unexpected tilting and shaking. (2) The present invention adopts an asymmetric sliding shaft support system that combines V-shaped guide grooves and trapezoidal open grooves. The V-shaped guide grooves contact the sliding shaft through two side walls, providing precise guidance and positioning. The trapezoidal open grooves only contact the sliding shaft through the bottom surface, avoiding sliding jamming caused by over-positioning. The combination of the two ensures extremely high motion guidance accuracy and achieves smooth and resistance-free sliding, greatly improving the stability and response speed of anti-shaking motion. (3) The present invention embeds metal parts in the inner and outer supports, which significantly enhances the structural strength and deformation resistance of the supports and extends the service life; on the other hand, it utilizes the magnetic attraction between the metal parts and the magnet to provide a continuous and uniform preload force for the slide shaft, firmly pressing the slide shaft in the slide shaft groove, eliminating mechanical clearance, and further improving motion accuracy and stability. (4) The present invention adopts a staggered layout design with X-IC arranged at the center of Y-coil and Y-IC arranged at the center of X-coil. It not only utilizes the Hall sensor principle to realize real-time displacement detection, but also completely avoids the interference of the magnetic field generated when the coil on the same side is energized on the IC detection accuracy, reduces displacement detection error, and realizes high-precision anti-shake control. (5) The present invention has a compact overall structure and a small number of parts. All parts are manufactured using conventional injection molding, patch and assembly processes. No special equipment or processes are required. It can be directly mass-produced and has a very high cost performance and market application prospects. Attached Figure Description

[0017] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the exploded structure of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the image stabilization mechanism in this invention; Figure 3 This is a schematic diagram illustrating the arrangement of the longitudinal and transverse sliding shafts in this invention. Figure 4 This is a top view of the carrier in this invention; Figure 5 This is a cross-sectional view of the carrier in this invention; Figure 6 This is a top view of the inner support in this invention; Figure 7 This is a cross-sectional view of the inner support in this invention; Figure 8 This is a top view of the outer support in this invention; Figure 9 This is a cross-sectional view of the outer support in this invention; Figure 10 This is a schematic diagram of the structure of the outer support and the inner support in this invention; Figure 11 This is a schematic diagram of the focusing module in this invention; Figure 12 This is a top view of part of the structure in this invention; Figure 13 This is a front view of a portion of the structure in this invention.

[0018] Wherein: 1—House, 11—Outer frame, 12—Base, 2—Lens assembly, 21—Lens, 22—Carrier, 23—Top cover, 3—Focusing module, 31—Ball assembly, 32—AF magnet, 33—Magnetic plate, 4—Shake stabilization mechanism, 41—Outer support, 42—Inner support, 43—Vertical slide shaft, 44—Horizontal slide shaft, 45—X-magnet, 46—Y-magnet, 47—Vertical slide groove, 48—Horizontal slide groove, 49—Ball groove, 491—Limiting mechanism, 5—Drive control module, 51—Flexible circuit board, 52—AF drive unit, 521—AF coil, 522—AF IC, 53—X-axis drive unit, 531—X-coil, 532—X-IC, 54—Y-axis drive unit, 541—Y-coil, 542—Y-IC. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example 1:

[0023] The main structure of this embodiment is as follows: Figure 1 , Figure 2 , Figure 3 As shown, the system includes a lens assembly 2, a focusing module 3, an image stabilization mechanism 4, and a drive control module 5. The lens assembly 2 includes a lens 21 and a carrier 22 for fixing and supporting the lens 21. The image stabilization mechanism 4 includes a lower outer support 41 and an upper inner support 42, with the upper part of the inner support 42 serving as the carrier 22 for fixing the lens 21. A plurality of longitudinal sliding grooves 47 are provided between the outer support 41 and the inner support 42, and each longitudinal sliding groove 47 is fitted with a matching and rotatable longitudinal sliding shaft 43, so that the inner support 42 and the upper part of the carrier 22 can be fixed. The carrier 22 can slide independently longitudinally relative to the outer support 41 under the control of the drive control module 5; a number of transverse sliding grooves 48 are provided between the inner support 42 and the carrier 22, and each transverse sliding groove 48 is equipped with a matching and rotatable transverse sliding shaft 44, so that the carrier 22 can slide independently laterally relative to the inner support 42 under the control of the drive control module 5; the focusing module 3 is located outside the image stabilization mechanism 4, and the drive control module 5 drives the carrier 22 and the image stabilization mechanism 4 as a whole to move independently in the vertical direction through the focusing module 3 to achieve automatic focusing.

[0024] The specific implementation process is as follows: Assemble the core moving parts of the image stabilization mechanism 4; place the inner support 42 directly above the outer support 41; process several longitudinal grooves 47 at corresponding positions on the upper surface of the outer support 41 and the lower surface of the inner support 42; install a longitudinal sliding shaft 43 that is precisely matched in size and can rotate freely in each longitudinal groove 47, so that the inner support 42 can slide freely in the longitudinal direction relative to the outer support 41; place the carrier 22 directly above the inner support 42; process several transverse grooves 48 at corresponding positions on the upper surface of the inner support 42 and the lower surface of the carrier 22; install a transverse sliding shaft 44 that is precisely matched in size and can rotate freely in each transverse groove 48, so that the carrier 22 can slide freely in the transverse direction relative to the inner support 42; press the lens 21 into the central mounting hole of the carrier 22 to form a complete lens assembly 2; install the focusing module 3 on the outer wall of the image stabilization mechanism 4; and install the drive control module 5 below the image stabilization mechanism 4.

[0025] After assembly, the drive control module 5 can send independent control signals to drive the carrier 22 to slide horizontally to achieve the stabilization process in the left and right directions, drive the inner bracket 42 to slide vertically to achieve the stabilization process in the front and back directions, and drive the entire stabilization mechanism 4 to slide up and down to achieve autofocus.

[0026] Example 2:

[0027] This embodiment, based on the above embodiment, further defines the positional relationship and structure of the longitudinal slide groove 47 and the transverse slide groove 48, such as... Figures 2-9 As shown, the longitudinal slide groove 47 and the transverse slide groove 48 are perpendicular to each other, and both the longitudinal slide groove 47 and the transverse slide groove 48 include at least one guide groove and at least one open groove. The contact area between the guide groove and the longitudinal slide shaft 43 or the transverse slide shaft 44 is greater than the contact area between the open groove and the longitudinal slide shaft 43 or the transverse slide shaft 44. By simultaneously using a combination of two groove types with different contact areas, namely guide grooves and open grooves, in the same direction, a perfect balance between the two is achieved. The large contact surface of the guide groove is responsible for precisely limiting the radial runout of the slide shaft, ensuring absolute accuracy of the movement direction; the small contact surface of the open groove is responsible for releasing unnecessary constraints and avoiding sliding jamming caused by over-positioning.

[0028] The specific implementation process is as follows: when machining the longitudinal slide groove 47 and the transverse slide groove 48, a uniform groove shape is not used. Instead, the slide groove in each direction is designed as a hybrid structure containing at least one guide groove and at least one open groove. During machining, dimensional tolerances are strictly controlled to ensure that the contact area between the guide groove and the longitudinal slide shaft 43 or the transverse slide shaft 44 is greater than the contact area between the open groove and the corresponding slide shaft. Simultaneously, all longitudinal slide grooves 47 are parallel to each other, all transverse slide grooves 48 are parallel to each other, and the longitudinal slide grooves 47 and transverse slide grooves 48 are perpendicular to each other at 90°. Other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0029] Example 3:

[0030] This embodiment, based on the above embodiment, further limits the number and layout of the longitudinal slide rails 47 and the transverse slide rails 48, such as... Figures 2-9 As shown, four longitudinal slides 47 and four transverse slides 48 are provided, distributed at the four corners of the outer support 41, the inner support 42, and the carrier 22. Each of the four longitudinal slides 47 and four transverse slides 48 consists of two open slots and two guide slots, which are arranged alternately. The optimal solution of four-corner distribution and diagonal alternation is adopted. The four slides are distributed at the four corners of the square structure, ensuring that the supporting force is evenly distributed at the four vertices, maximizing torsional stiffness. The two guide slots and two open slots are arranged diagonally alternately, forming a balanced structure of diagonal guidance and diagonal support, ensuring accurate bidirectional guidance, completely avoiding over-positioning, and ensuring that the force on the entire motion system is completely symmetrical, effectively preventing tilting and shaking during movement. The other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0031] The specific implementation process is as follows: Four longitudinal grooves 47 are evenly distributed at the four corners of the outer support 41 and the inner support 42; four transverse grooves 48 are also evenly distributed at the four corners of the inner support 42 and the carrier 22. Of the four longitudinal grooves 47, the two grooves at the upper left and lower right corners are machined as guide grooves, and the two grooves at the upper right and lower left corners are machined as open grooves, so that the guide grooves and open grooves are arranged alternately. The transverse grooves 48 adopt the exact same layout as the longitudinal grooves 47.

[0032] Example 4:

[0033] This embodiment, based on the above embodiments, further clarifies the optimal geometry of the guide groove and the open groove, such as... Figures 2-9 As shown, the guide groove has a V-shaped structure, and its two sidewalls form line contact with the outer circumferential surface of the longitudinal sliding shaft 43 or the transverse sliding shaft 44; the open groove has a trapezoidal structure, and its bottom surface forms line contact with the outer circumferential surface of the longitudinal sliding shaft 43 or the transverse sliding shaft 44. Both adopt line contact, which significantly reduces frictional resistance and improves motion response speed compared to traditional surface contact. The V-shaped guide groove forms double-line contact with the sliding shaft through its two sidewalls, providing the most stable bidirectional guidance; the trapezoidal open groove only forms single-line contact with the sliding shaft through its bottom surface, providing support while maximizing the release of radial constraints.

[0034] The specific implementation process is as follows: the guide groove is machined into a V-shaped structure with an included angle of 90°, so that its two inclined sidewalls can simultaneously form two parallel line contacts with the outer circumferential surface of the longitudinal sliding shaft 43 or the transverse sliding shaft 44. The open groove is machined into a trapezoidal structure that is wider at the top and narrower at the bottom, so that its horizontal bottom surface forms only one line contact with the outer circumferential surface of the corresponding sliding shaft. The other parts of this embodiment are the same as those in the above embodiment, and will not be repeated here.

[0035] Example 5:

[0036] This embodiment further defines the structure of the image stabilization mechanism 4 based on the above embodiments, such as... Figures 2-10 As shown, the anti-shake mechanism 4 includes an X-magnet 45 and a Y-magnet 46 fixedly mounted at 90° angles to the outer wall of the carrier 22. Metal components capable of being attracted by the magnets are embedded within both the inner support 42 and the outer support 41. The magnetic attraction between the metal components and the X-magnet 45 and Y-magnet 46 presses and fixes the longitudinal sliding shaft 43 or the transverse sliding shaft 44 into the corresponding longitudinal sliding groove 47 or transverse sliding groove 48, respectively. The metal components are pre-embedded inside the plastic support, significantly enhancing the structural strength and deformation resistance of the support, solving the problem of easy deformation of pure plastic supports after long-term use. Utilizing the natural magnetic attraction between the X-magnet 45, Y-magnet 46 and the metal components, a continuous, uniform, and wear-free preload force is provided to the sliding shaft, firmly pressing the sliding shaft into the sliding groove and completely eliminating mechanical clearance.

[0037] The specific implementation process is as follows: Before injection molding the inner support 42 and the outer support 41, thin stainless steel metal sheets are pre-placed in the corresponding positions of the mold. Through pre-embedded injection molding, the metal parts and the plastic support form an inseparable integrated structure. X-magnets 45 and Y-magnets 46 are perpendicularly attached to two adjacent outer walls of the carrier 22 at 90° angles. After assembly, the magnetic field generated by the X-magnets 45 and Y-magnets 46 will exert a downward magnetic attraction on the metal parts inside the support. This magnetic attraction is transmitted through the support to the longitudinal sliding shaft 43 and the transverse sliding shaft 44, respectively pressing and fixing the sliding shafts into the corresponding longitudinal sliding groove 47 and transverse sliding groove 48. Other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0038] Example 6:

[0039] This embodiment further defines the structure of the housing 1 based on the above embodiments, such as... Figure 1As shown, the device also includes a housing 1, which comprises an upper outer frame 11 and a lower base 12. The outer frame 11 is fixedly mounted on the upper surface of the base 12, and the two together form a closed receiving cavity. The carrier 22, focusing module 3, image stabilization mechanism 4, and drive control module 5 are all installed within the closed receiving cavity. The lens 21 fixed to the upper part of the carrier 22 extends out of the housing 1 from the top through hole of the outer frame 11. The bottom of the base 12 has a photosensitive chip avoidance hole, and the side has an exit slot for the drive control module 5. This split design facilitates the assembly of all internal moving parts and forms a closed receiving cavity, effectively preventing dust, moisture, and foreign objects from entering the motor, significantly improving the product's reliability and lifespan. The dedicated avoidance hole and exit slot on the base 12 meet the overall assembly and electrical connection requirements of the camera motor.

[0040] The specific implementation process is as follows: the housing 1 adopts a split design of an upper outer frame 11 and a lower base 12. First, the assembled carrier 22, focusing module 3, image stabilization mechanism 4, and drive control module 5 are all placed in the internal cavity of the base 12, with one end of the drive control module 5 extending from the lead-out slot on the side of the base 12. Then, the outer frame 11 is fastened to the upper surface of the base 12 and fixed with adhesive, forming a closed receiving cavity together. At this time, the lens 21 fixed on the upper part of the carrier 22 extends out of the housing 1 from the top through-hole of the outer frame 11. A photosensitive chip avoidance hole is pre-drilled at the center of the bottom of the base 12 to avoid the photosensitive chip below. Other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0041] Example 7:

[0042] This embodiment further defines the structure of the focusing module 3 based on the above embodiments, such as... Figure 1 , Figure 11As shown, the focusing module 3 includes at least two sets of ball bearing assemblies 31. The difference in the number of balls in the two sets of ball bearing assemblies 31 is not less than 2, and the diameters of two adjacent balls in the same set of ball bearing assemblies are different, while the diameters of balls spaced one position apart are the same. The outer wall of the image stabilization mechanism 4 is provided with trapezoidal ball bearing grooves 49 that match the number of sets of ball bearing assemblies 31. Each set of ball bearing assemblies 31 is placed in the matching ball bearing groove 49. A magnetic suction plate 33 is also installed on the outside of the ball bearing groove 49. The magnetic suction plate 33 and the metal parts embedded in the inner bracket 42 and the outer bracket 41 generate a preload force to press the balls 31 into the trapezoidal groove. An AF magnet 32 ​​is installed on the outer bracket 41 and directly opposite the magnetic suction plate 33. The drive control module 5 drives the AF magnet 32, thereby realizing automatic focusing by allowing the carrier 22 and the image stabilization mechanism 4 to move independently in the vertical direction. The asymmetrical ball bearing design can perfectly adapt to the eccentric torque distribution of the eccentric module and avoid tilting during movement. The magnetic attraction between the magnetic plate 33 and the metal parts inside the bracket generates a continuous preload, which completely eliminates the mechanical gap between the ball and the groove, ensuring focusing accuracy.

[0043] The specific implementation process is as follows: Trapezoidal ball grooves 49, matching the number of ball bearing assemblies 31, are machined on the corresponding positions of the outer wall of the image stabilization mechanism 4. At least two independent ball bearing assemblies 31 are configured, ensuring that the difference in the number of balls between the two sets of assemblies 31 is not less than 2, and that the diameters of adjacent balls in the same set are different, while the diameters of balls spaced one position apart are the same. Each set of ball bearing assemblies 31 is placed in the matching trapezoidal ball groove 49. A magnetic chuck 33 is fixedly installed on the outside of the ball groove 49. The magnetic attraction between the magnetic chuck 33 and the metal parts embedded in the inner bracket 42 and outer bracket 41 generates a continuous preload force, pressing the ball bearing assemblies 31 tightly into the trapezoidal groove. An AF magnet 32 ​​is installed directly opposite the outer side of the magnetic chuck 33 and is fixedly mounted on the outer bracket 41. When the drive control module 5 drives the AF magnet 32, it can drive the carrier 22 and the image stabilization mechanism 4 to move vertically, achieving autofocus. The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0044] Example 8:

[0045] This embodiment further defines the structure of the focusing module 3 based on the above embodiments, such as... Figure 1 , Figure 11As shown, there are two sets of ball bearing assemblies 31. One set contains one ball bearing, and the other set contains three balls bearing. The diameter of the middle ball bearing is smaller than that of the upper and lower balls, forming an asymmetrical support layout. There are also two sets of ball bearing grooves 49. The ball bearing groove 49 containing one ball bearing has a limiting mechanism 491 at its upper part. The angle between the limiting mechanism 491 and the bottom of the ball bearing groove 49 is 15°~45°. The stable structure of the three-point main support and the single-point auxiliary support perfectly matches the eccentric moment distribution of the eccentric module, effectively avoiding tilting and jamming during movement. The design that the diameter of the middle ball bearing is smaller than that of the balls at both ends can further reduce frictional resistance and improve the smoothness of movement. The 15°~45° limiting mechanism 491 can effectively prevent the ball bearing from falling out of the groove during severe vibration or drop, improving structural reliability.

[0046] The specific implementation process is as follows: the number of ball bearing assemblies 31 is set to two groups, with the first group of ball bearing assemblies 31 equipped with one ball and the second group of ball bearing assemblies 31 equipped with three balls. In the three-ball assembly, the diameter of the ball located in the middle position is designed to be smaller than the diameter of the balls at the top and bottom ends. Two sets of trapezoidal ball grooves 49 are machined accordingly. An inclined limiting mechanism 491 is machined on the upper part of the ball groove 49 where one ball is placed, and the included angle between the limiting mechanism 491 and the bottom of the ball groove 49 is precisely controlled within the range of 15° to 45°. After assembly, the three ball bearing groups act as the main support to bear most of the load, and the one ball bearing group acts as an auxiliary support to restrict the degree of rotational freedom, together achieving smooth up and down focusing sliding. The other parts of this embodiment are the same as those in the above embodiment and will not be repeated.

[0047] Example 9:

[0048] This embodiment further defines the structure of the drive control module 5 based on the above embodiments, such as... Figure 1 , Figure 12 , Figure 13 As shown, the drive control module 5 includes a flexible circuit board 51 fixedly installed on the inner wall of the base 12. One end of the flexible circuit board 51 extends out of the housing 1 from the lead-out slot on the side of the base 12 and is electrically connected to the external motherboard. An AF drive unit 52, an X-axis drive unit 53, and a Y-axis drive unit 54 are integrated on the flexible circuit board 51. The AF drive unit 52 is arranged to cooperate with the focusing module 3. The X-axis drive unit 53 and the Y-axis drive unit 54 are respectively arranged to cooperate with the X-magnet 45 and the Y-magnet 46 of the image stabilization mechanism 4. The AF drive unit 52 includes an AF coil 521 corresponding to the AF magnet 32, and an AF IC 522 installed in the middle of the AF coil 521. The AF IC 522 detects the magnetic field of the AF magnet 32 ​​and controls the carrier 22 and the image stabilization mechanism 4 to move together in the vertical direction through the focusing module 3 to adjust the autofocus accuracy. The X-axis drive unit 53 includes an X-coil 531 corresponding to the X-magnet 45, and a Y-IC 542 installed in the middle of the X-coil 531. The Y-IC 542 detects the magnetic field of the Y-magnet 46 and controls the carrier 22 to move left and right through the anti-shake mechanism 4 to achieve lateral anti-shake accuracy adjustment. The Y-axis drive unit 54 includes a Y-coil 541 corresponding to the Y-magnet 46, and an X-IC 532 installed in the middle of the Y-coil 541. The X-IC 532 detects the magnetic field of the X-magnet 45 and controls the carrier 22 to move forward and backward through the anti-shake mechanism 4 to achieve longitudinal anti-shake accuracy adjustment. By placing the Y-IC 542 at the center of the X-coil 531, when the X-coil is energized, it only affects the Y-IC, which is not working at this time; conversely, when the Y-coil is energized, it only affects the X-IC, which is not working at this time, thus completely avoiding magnetic field interference.

[0049] The specific implementation process is as follows: A flexible circuit board 51 is fixedly attached to the inner wall of the base 12 using adhesive dispensing, with one end of the flexible circuit board 51 extending out of the housing 1 from the lead-out slot on the side of the base 12, achieving electrical connection with the external mainboard. An AF drive unit 52, an X-axis drive unit 53, and a Y-axis drive unit 54 are integrated and arranged on the flexible circuit board 51, with the AF drive unit 52 directly facing the focusing module 3, the X-axis drive unit 53 directly facing the X-magnet 45, and the Y-axis drive unit 54 directly facing the Y-magnet 46. An AF-IC 522 is soldered to the center of the AF-coil 521 to detect the magnetic field of the AF-magnet 32 ​​and control focusing accuracy; a Y-IC 542 is soldered to the center of the X-coil 531 to detect the magnetic field of the Y-magnet 46 and control lateral image stabilization accuracy; and an X-IC 532 is soldered to the center of the Y-coil 541 to detect the magnetic field of the X-magnet 45 and control longitudinal image stabilization accuracy. The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0050] Example 10: This embodiment, based on the above embodiments, further defines the optimal size matching relationship between the magnet and the coil, such as... Figure 1 , Figure 12 , Figure 13As shown, the AF-coil 521, X-coil 531, and Y-coil 541 are all soldered onto the flexible circuit board 51, and the dimensions of the AF-magnet 32, X-magnet 45, and Y-magnet 46 are smaller than the dimensions of the corresponding AF-coil 521, X-coil 531, and Y-coil 541.

[0051] The specific implementation process involves uniformly soldering and fixing the AF-coil 521, X-coil 531, and Y-coil 541 to their corresponding positions on the flexible circuit board 51 using a surface mount technology. During the design, the size ratio between the magnet and the coil is strictly controlled, ensuring that the length and width of the AF-magnet 32 ​​are both smaller than the inner coil length and width of the AF-coil 521, the length and width of the X-magnet 45 are both smaller than the inner coil length and width of the X-coil 531, and the length and width of the Y-magnet 46 are both smaller than the inner coil length and width of the Y-coil 541. This ensures that even under maximum displacement, the edge of the magnet does not exceed the inner coil edge of its corresponding coil and remains within the effective magnetic field range of the coil. Other parts of this embodiment are the same as those in the previous embodiment and will not be repeated here.

[0052] Example 11: This embodiment further defines the structure of the lens assembly 2 based on the above embodiments, such as... Figure 1 , Figure 12 , Figure 13 As shown, the lens assembly 2 also includes a top cover 23. The lower edge of the top cover 23 is provided with several pins. The upper edge of the outer bracket 41 is provided with a support column that matches the number and position of the pins on the lower part of the top cover 23. The support column is provided with a pin groove that matches the pins. The top cover 23 is fixedly installed on the upper end face of the carrier 22 by the cooperation of the pins and the pin groove, thereby axially locking the lens 21 on the carrier 22.

[0053] The specific implementation process is as follows: the lens assembly 2 also includes a top cover 23. Several downwardly extending pins are machined on the lower edge of the top cover 23. Upwardly protruding support columns, matching the number and position of the pins, are machined on the upper edge of the outer bracket 41. A pin groove matching the pin is machined at the top of each support column. The top cover 23 is placed on the upper surface of the carrier 22, aligning the pins at the bottom of the top cover 23 with the pin grooves on the support columns of the outer bracket 41. The top cover 23 is pressed downwards to insert the pins into the pin grooves, completing the interference fit fixation. The lower surface of the top cover 23 presses tightly against the root flange of the lens 21, axially locking the lens 21 onto the carrier 22. Other parts of this embodiment are the same as those in the above embodiment and will not be described again.

[0054] It is understood that the working principle and process of the three-axis decoupled independent image stabilization camera motor structure according to an embodiment of the present invention, such as the lens 21 and the drive control module 5, are existing technologies and are well known to those skilled in the art, and will not be described in detail here.

[0055] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A three-axis decoupled independent image stabilization camera motor, characterized in that, The system includes a lens assembly (2), a focusing module (3), an image stabilization mechanism (4), and a drive control module (5); the lens assembly (2) includes a lens (21) and a carrier (22) for fixing the lens (21); the image stabilization mechanism (4) includes a lower outer bracket (41) and an upper inner bracket (42), the upper part of the inner bracket (42) being the carrier (22) for fixing the lens (21); a plurality of longitudinal sliding grooves (47) are provided between the outer bracket (41) and the inner bracket (42), and each longitudinal sliding groove (47) is provided with a matching and rotatable longitudinal sliding shaft (43), so that the inner bracket (42) and its upper part are fixed. The carrier (22) can slide independently longitudinally relative to the outer support (41) under the control of the drive control module (5); a number of transverse sliding grooves (48) are provided between the inner support (42) and the carrier (22), and each transverse sliding groove (48) is equipped with a matching and rotatable transverse sliding shaft (44), so that the carrier (22) can slide independently transversely relative to the inner support (42) under the control of the drive control module (5); the focusing module (3) is located outside the image stabilization mechanism (4), and the drive control module (5) drives the carrier (22) and the image stabilization mechanism (4) to move independently in the up and down direction through the focusing module (3) to achieve automatic focusing.

2. The three-axis decoupled independent image stabilization camera motor according to claim 1, characterized in that, The longitudinal slide groove (47) and the transverse slide groove (48) are perpendicular to each other, and both the longitudinal slide groove (47) and the transverse slide groove (48) include at least one guide groove and at least one open groove. The contact area between the guide groove and the longitudinal slide shaft (43) or the transverse slide shaft (44) is greater than the contact area between the open groove and the longitudinal slide shaft (43) or the transverse slide shaft (44).

3. A three-axis decoupled independent image stabilization camera motor according to claim 2, characterized in that, There are four longitudinal slides (47) and four transverse slides (48), distributed at the four corners of the outer support (41), the inner support (42), and the carrier (22). Each of the four longitudinal slides (47) and the four transverse slides (48) consists of two open slots and two guide slots, which are arranged alternately at intervals.

4. A three-axis decoupled independent image stabilization camera motor according to claim 3, characterized in that, The guide groove has a V-shaped structure, and the two side walls of the guide groove form a line contact with the outer circumferential surface of the longitudinal sliding shaft (43) or the transverse sliding shaft (44); the open groove has a trapezoidal structure, and the bottom surface of the open groove forms a line contact with the outer circumferential surface of the longitudinal sliding shaft (43) or the transverse sliding shaft (44).

5. A three-axis decoupled independent image stabilization camera motor according to any one of claims 1 to 4, characterized in that, The anti-shake mechanism (4) includes an X-magnet (45) and a Y-magnet (46) that are fixed at 90° vertically to the outer wall of the carrier (22). The inner support (42) and the outer support (41) are both embedded with metal parts that can be attracted by the magnets. The magnetic attraction between the metal parts and the X-magnet (45) and the Y-magnet (46) presses the longitudinal slide shaft (43) or the transverse slide shaft (44) into the corresponding longitudinal slide groove (47) or transverse slide groove (48).

6. A three-axis decoupled independent image stabilization camera motor according to claim 5, characterized in that, It also includes a housing (1), which includes an upper outer frame (11) and a lower base (12). The outer frame (11) is fixedly installed on the upper surface of the base (12), and the two together form a closed cavity. The carrier (22), focusing module (3), image stabilization mechanism (4) and drive control module (5) are all installed in the closed cavity. The lens (21) fixed on the upper part of the carrier (22) extends out of the housing (1) from the top through hole of the outer frame (11). The bottom of the base (12) is provided with a photosensitive chip avoidance hole, and the side is provided with a lead-out groove for the drive control module (5).

7. A three-axis decoupled independent image stabilization camera motor according to claim 5, characterized in that, The focusing module (3) includes at least two sets of ball bearing assemblies (31), the difference in the number of balls in the two sets of ball bearing assemblies (31) is not less than 2, and the diameters of two adjacent balls in the same set of ball bearing assemblies are different, and the diameters of balls spaced one position apart are the same; the outer wall of the image stabilization mechanism (4) is provided with trapezoidal ball bearing grooves (49) that match the number of sets of ball bearing assemblies (31), and each set of ball bearing assemblies (31) is placed in the matching ball bearing groove (49); the ball bearing grooves (49) 9) A magnetic accumulator (33) is also installed on the outside. The magnetic accumulator (33) and the metal parts embedded in the inner bracket (42) and outer bracket (41) generate a pre-tightening force to press the ball (31) into the trapezoidal groove. An AF-magnet (32) is installed on the outer bracket (41) directly opposite the magnetic accumulator (33). The drive control module (5) drives the AF-magnet (32) to achieve automatic focusing by making the carrier (22) and the image stabilization mechanism (4) move independently in the vertical direction.

8. A three-axis decoupled independent image stabilization camera motor according to claim 7, characterized in that, The number of ball bearing assemblies (31) is two sets, one set of ball bearing assemblies (31) contains one ball bearing, and the other set of ball bearing assemblies (31) contains three balls bearing, and the diameter of the middle ball bearing is smaller than the diameter of the upper and lower balls bearing, forming an asymmetrical support layout; the number of ball bearing grooves (49) is two sets, and the upper part of the ball bearing groove (49) that holds one ball bearing is provided with a limiting mechanism (491), and the angle between the limiting mechanism (491) and the bottom of the ball bearing groove (49) is 15°~45°.

9. A three-axis decoupled independent image stabilization camera motor according to claim 8, characterized in that, The drive control module (5) includes a flexible circuit board (51) fixedly installed on the inner wall of the base (12). One end of the flexible circuit board (51) extends out of the housing (1) from the lead-out slot on the side of the base (12) and is electrically connected to the external motherboard. An AF drive unit (52), an X-axis drive unit (53) and a Y-axis drive unit (54) are integrated on the flexible circuit board (51). The AF drive unit (52) is arranged to cooperate with the focusing module (3). The X-axis drive unit (53) and the Y-axis drive unit (54) are arranged to cooperate with the X-magnet (45) and Y-magnet (46) of the image stabilization mechanism (4), respectively. The AF drive unit (52) includes an AF coil (521) corresponding to the AF magnet (32) and an AF IC (522) installed in the middle of the AF coil (521). The AF IC (522) detects the magnetic field of the AF magnet (32) and controls the carrier (22) and the image stabilization mechanism (4) to move together in the vertical direction through the focusing module (3) to adjust the autofocus accuracy. The X-axis drive unit (53) includes an X-coil (531) corresponding to the X-magnet (45) and a Y-IC (542) installed in the middle of the X-coil (531). The Y-IC (542) detects the magnetic field of the Y-magnet (46) and controls the carrier (22) to move in the left and right directions through the anti-shake mechanism (4) to achieve lateral anti-shake accuracy adjustment. The Y-axis drive unit (54) includes a Y-coil (541) corresponding to the Y-magnet (46) and an X-IC (532) installed in the middle of the Y-coil (541). The X-IC (532) detects the magnetic field of the X-magnet (45) and controls the carrier (22) to move in the forward and backward directions through the anti-shake mechanism (4) to achieve longitudinal anti-shake accuracy adjustment.

10. A three-axis decoupled independent image stabilization camera motor according to any one of claims 1 to 4, characterized in that, The lens assembly (2) also includes a top cover (23). The lower edge of the top cover (23) is provided with several pins. The upper edge of the outer bracket (41) is provided with a support column that matches the number and position of the pins at the bottom of the top cover (23). The support column is provided with a pin groove that matches the pins. The top cover (23) is fixedly installed on the upper surface of the carrier (22) by the cooperation of the pins and the pin groove, thereby axially locking the lens (21) on the carrier (22).

Images