Optical image stabilization mechanism, camera assembly, and electronic device

Abstract

The application provides an optical image stabilization mechanism for reducing focus drift of a moving part of a camera assembly relative to a fixed part, the optical image stabilization mechanism comprising a first anti-vibration mechanism and a second anti-vibration mechanism, the first anti-vibration mechanism is arranged on an X-axis of the moving part, the first anti-vibration mechanism comprises a first magnet group, a first coil group and a first electromagnetic sensor, the first magnet group is arranged on a first side of the moving part, the first coil group and the electromagnetic sensor are arranged on a first side of the fixed part, and the first magnet group is opposite to the first electromagnetic sensor and the first coil group; the second anti-vibration mechanism is arranged on a Y-axis of the moving part, the second anti-vibration mechanism comprises a second magnet group, a second coil group and a second electromagnetic sensor, the second magnet group is arranged on a second side of the moving part, the second coil group and the second electromagnetic sensor are arranged on a second side of the fixed part, and the second magnet group is opposite to the second coil group and the second electromagnetic sensor. The application also provides a camera assembly and an electronic device provided with the optical image stabilization mechanism.

Description

Technical Field

[0001] This invention relates to the field of optical image stabilization devices, and more particularly to an optical image stabilization mechanism, a camera assembly equipped with the optical image stabilization mechanism, and an electronic device equipped with the camera assembly. Background Technology

[0002] Mobile devices such as smartphones and tablets are equipped with cameras, and some cameras employ a dual-coil low-leakage design for both X-axis and Y-axis image stabilization. Related technologies generally use optical image stabilization (OIS) or digital image stabilization (DSS) to prevent the camera's rotor from tilting relative to the stator. OIS uses the movement of built-in lenses or sensing elements to counteract external vibrations and maintain image stability. In some OIS technologies, the sensing elements are positioned horizontally within the coil. However, horizontal placement of the sensing elements can cause deviations or instability in the autofocus system when attempting to maintain focus. This results in the focus failing to accurately track changes in the subject's position within the frame, thus affecting image sharpness. Summary of the Invention

[0003] The present invention aims to provide an optical image stabilization mechanism for reducing autofocus drift, a camera assembly provided with the optical image stabilization mechanism, and an electronic device provided with the camera assembly.

[0004] To address the aforementioned technical problems, this invention provides an optical image stabilization mechanism for reducing focus drift of a camera assembly's moving part relative to its stator. The optical image stabilization mechanism includes a first anti-vibration mechanism and a second anti-vibration mechanism. The first anti-vibration mechanism is disposed on the X-axis of the moving part and includes a first magnet group, a first coil group, and a first electromagnetic sensor. The first magnet group is disposed on a first side of the moving part, and the first coil group and the electromagnetic sensor are disposed on a first side of the stator, with the first magnet group facing the first electromagnetic sensor and the first coil group. The second anti-vibration mechanism is disposed on the Y-axis of the moving part and includes a second magnet group, a second coil group, and a second electromagnetic sensor. The second magnet group is disposed on a second side of the moving part, and the second coil group and the second electromagnetic sensor are disposed on a second side of the stator, with the second magnet group facing the second coil group and the second electromagnetic sensor.

[0005] The present invention also provides a camera assembly, the camera assembly including a stator, a mover disposed in the stator, a lens disposed on the mover, and an optical image stabilization mechanism; the optical image stabilization mechanism is used to reduce the focus drift of the mover of the camera assembly relative to the stator, the optical image stabilization mechanism includes a first anti-vibration mechanism and a second anti-vibration mechanism, the first anti-vibration mechanism is disposed on the X-axis of the mover, the first anti-vibration mechanism includes a first magnet group, a first coil group and a first electromagnetic sensing element, the first magnet group is disposed on a first side of the mover, the first coil group and the electromagnetic sensing element are disposed on a first side of the stator, the first magnet group is directly opposite the first electromagnetic sensing element and the first coil group; the second anti-vibration mechanism is disposed on the Y-axis of the mover, the second anti-vibration mechanism includes a second magnet group, a second coil group and a second electromagnetic sensing element, the second magnet group is disposed on a second side of the mover, the second coil group and the second electromagnetic sensing element are disposed on a second side of the stator, the second magnet group is directly opposite the second coil group and the second electromagnetic sensing element.

[0006] The present invention also provides an electronic device, comprising a housing, a motherboard disposed within the housing, and a camera assembly. The camera assembly includes a stator, a mover disposed within the stator, a lens disposed on the mover, and an optical image stabilization mechanism. The optical image stabilization mechanism is used to reduce focus drift of the mover relative to the stator of the camera assembly. The optical image stabilization mechanism includes a first anti-vibration mechanism and a second anti-vibration mechanism. The first anti-vibration mechanism is disposed on the X-axis of the mover and includes a first magnet group, a first coil group, and a first electromagnetic sensing element. The first magnet group is disposed on a first side of the mover. The first coil group and the electromagnetic sensing element are disposed on the first side of the stator, with the first magnet group facing the first electromagnetic sensing element and the first coil group; the second vibration damping mechanism is disposed on the Y-axis of the mover, and the second vibration damping mechanism includes a second magnet group, a second coil group and a second electromagnetic sensing element, with the second magnet group disposed on the second side of the mover, and the second coil group and the second electromagnetic sensing element disposed on the second side of the stator, with the second magnet group facing the second coil group and the second electromagnetic sensing element; the camera assembly is disposed inside the housing, and the camera assembly is electrically connected to the motherboard.

[0007] The camera assembly provided by this invention has a first magnet group disposed on a first side of the mover, a second magnet group disposed on a second side of the mover, a first coil assembly and a first electromagnetic sensing element disposed on a first side of the stator, and a second coil assembly and a second electromagnetic sensing element disposed on a second side of the stator. The first magnet group faces the first coil assembly and the first electromagnetic sensing element, and the second magnet group faces the second coil assembly and the second electromagnetic sensing element. The first and second anti-vibration mechanisms can reduce the rotation of the mover relative to the stator around the X-axis or Y-axis, thereby reducing the deviation or instability that occurs when the camera assembly's autofocus system attempts to maintain focus, so that the focus can accurately track changes in the position of the subject in the image, thereby improving the clarity of the image. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a three-dimensional structural diagram of the camera assembly provided in the first embodiment of the present invention;

[0010] Figure 2 yes Figure 1 A three-dimensional structural exploded view of the camera component in the diagram;

[0011] Figure 3 yes Figure 2 A further exploded 3D structural diagram of the camera component;

[0012] Figure 4 yes Figure 2 A three-dimensional exploded view of the optical image stabilization mechanism of the camera component.

[0013] Figure 5 yes Figure 4 A further three-dimensional structural breakdown diagram of the optical image stabilization mechanism in the diagram;

[0014] Figure 6 yes Figure 4 A three-dimensional structural diagram of the optical image stabilization mechanism from another perspective;

[0015] Figure 7 yes Figure 6 A further three-dimensional structural breakdown diagram of the optical image stabilization mechanism in the diagram;

[0016] Figure 8 yes Figure 2 A three-dimensional cross-sectional view of the optical image stabilization mechanism and the housing.

[0017] Figure 9 yes Figure 2 A schematic diagram of the magnetic field lines distribution of one of the stabilizing mechanisms in the optical image stabilization mechanism;

[0018] Figure 10 yes Figure 2 A schematic diagram of the magnetic field lines distribution of another stabilizing mechanism in the optical image stabilization mechanism;

[0019] Figure 11 yes Figure 2 A schematic diagram of the structure of one of the coil groups in the optical image stabilization mechanism;

[0020] Figure 12 This is an analysis diagram of the autofocus drift phenomenon in existing optical image stabilization mechanisms;

[0021] Figure 13 This is an analytical diagram of the autofocus drift phenomenon of the optical image stabilization mechanism of this application;

[0022] Figure 14 This is a three-dimensional structural schematic diagram of the optical image stabilization mechanism provided in the second embodiment of the present invention;

[0023] Figure 15 This is a three-dimensional structural schematic diagram of the optical image stabilization mechanism provided in the third embodiment of the present invention;

[0024] Figure 16 This is a three-dimensional structural diagram of an electronic device provided in one embodiment of the present invention.

[0025] Main labeling descriptions: 100, Camera assembly; 20, Stator; 202, Mounting space; 21, Cover; 212, Cover plate; 214, Connecting cylinder; 216, Connecting hole; 31, Support ball; 33, Connecting ball; 40, Moving element; 50, Lens; 51, Housing; 52, Light-transmitting hole; 60, Optical image stabilization mechanism; 62, First anti-vibration mechanism; 620, First magnet group; 621, First electromagnetic sensor; 622, First magnet; 623, Second electromagnetic sensor; 624, First isolation block; 625, First coil group; 6250, First rectangular coil; 6252, First inner cavity; 626, First positioning frame; 6261, First positioning piece; 6263, First latch; 6265, First clearance opening; 64, Second anti-vibration mechanism; 640, Second magnet group; 64 1. Third electromagnetic sensor; 642. Second magnet; 644. Second isolation block; 645. Second coil group; 6450. Second rectangular coil; 6452. Second inner cavity; 646. Second positioning frame; 6461. Second positioning piece; 6463. Second latch; 6465. Second clearance opening; 65. Third vibration damping mechanism; 650. Third magnet group; 652. Third magnet; 654. Third isolation block; 655. Third coil group; 6552. Third inner cavity; 656. Fourth electromagnetic sensor; 657. Third positioning frame; 6571. Third positioning piece; 6573. Third latch; 70. Base; 71. Seat; 73. Circuit board; 75. Image sensor; 76. Flexible circuit board; 78. Connector; 400. Housing; 500. Main board; 600. Display screen. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Furthermore, the following descriptions of various embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments that can be implemented in this application. Directional terms used in this application, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "linked," and "set on" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] Please see Figures 1 to 3 The camera assembly 100 provided in the first embodiment of the present invention includes a stator 20, a cover 21 sleeved on the stator 20, a mover 40 disposed in the stator 20, a lens 50 disposed on the mover 40, and an optical image stabilization mechanism 60. The optical image stabilization mechanism 60 is disposed between the stator 20 and the mover 40. The optical image stabilization mechanism 60 is used to reduce the focus drift of the mover 40 relative to the stator 20, that is, to reduce the movement of the mover 40 relative to the mover 40 in the X-axis direction and the Y-axis direction. The optical image stabilization mechanism 60 includes a first anti-vibration mechanism 62, a second anti-vibration mechanism 64, and a third anti-vibration mechanism 65. The camera assembly 100 is placed on a plane enclosed by the X-axis and the Y-axis. The first anti-vibration mechanism 62 is located on the X-axis of the camera assembly 100, the second anti-vibration mechanism 64 is located on the Y-axis of the camera assembly 100, and the third anti-vibration mechanism 65 is arranged alternately with the second anti-vibration mechanism 64 on the Y-axis. The mover 40 is located between the second anti-vibration mechanism 64 and the third anti-vibration mechanism 65. The X-axis direction of the mover 40 is consistent with the X-axis direction of the camera assembly 100, and the Y-axis direction of the mover 40 is consistent with the Y-axis direction of the camera assembly 100. The first vibration damping mechanism 62 includes a first magnet assembly 620, a first coil assembly 625, and a first electromagnetic sensing element. The first magnet assembly 620 is disposed on the first side of the mover 40, and the first coil assembly 625 and the first electromagnetic sensing element are disposed on the first side of the stator 20. The first magnet assembly 620 is directly opposite the first electromagnetic sensing element and the first coil assembly 625 in the X-axis direction. The second vibration damping mechanism 64 includes a second magnet assembly 640, a second coil assembly 645, and a second electromagnetic sensing element. The second magnet assembly 640 is disposed on the second side of the mover 40, and the second coil assembly 625 is disposed on the second side of the stator 20. The coil assembly 645 and the second electromagnetic sensing element are disposed on the second side of the stator 20. The second magnet assembly 640 is directly opposite the second coil assembly 645 and the second electromagnetic sensing element in the Y-axis direction. The third vibration damping mechanism 65 includes a third magnet assembly 650, a third coil assembly 655, and a third electromagnetic sensing element. The third magnet assembly 650 is disposed on the third side of the mover 40. The third coil assembly 655 and the third electromagnetic sensing element are disposed on the third side of the stator 20. The third magnet assembly 650 is directly opposite the third coil assembly 655 and the third electromagnetic sensing element in the Y-axis direction. The second side is directly opposite the third side in the Y-axis direction, and the first side is located between the second side and the third side.

[0030] The camera assembly 100 provided by the present invention has a first magnet group 620 disposed on the first side of the mover 40, a second magnet group 640 disposed on the second side of the mover 40, a first coil assembly 625 and a first electromagnetic sensing element disposed on the first side of the stator 20, and a second coil assembly 645 and a second electromagnetic sensing element disposed on the second side of the stator 20. The first magnet group 620 is directly opposite the first coil assembly 625 and the first electromagnetic sensing element, and the second magnet group 640 is directly opposite the second coil assembly 645 and the second electromagnetic sensing element. The first anti-vibration mechanism 62 and the second anti-vibration mechanism 64 can reduce the rotation of the mover 40 relative to the stator 20 around the X-axis or Y-axis, so as to reduce the deviation or instability of the autofocus system of the camera assembly 100 when trying to maintain the focus, so that the focus can accurately track when the position of the subject changes in the picture, thereby improving the clarity of the image.

[0031] like Figure 2 and Figure 3 As shown, the cover 21 includes a cover plate 212 and a connecting cylinder 214 connected around the cover plate 212. A connecting hole 216 is provided in the middle of the cover plate 212 along the optical axis L of the lens 50. The cover plate 212 and the connecting cylinder 214 form a receiving space, and the connecting hole 216 communicates with this receiving space. The stator 20 is housed within this receiving space. A mounting space 202 is provided in the middle of the stator 20 along the optical axis L of the lens 50. The opposite ends of the mounting space 202 pass through the top and bottom surfaces of the stator 20, respectively. The mounting space 202 faces and communicates with the connecting hole 216. In this embodiment, the cover plate 212 is rectangular, the connecting cylinder 214 is a rectangular cylinder, and the connecting hole 216 is a circular hole passing through the cover 21. In other embodiments, the cover plate 212 may also be, but is not limited to, a circular plate, a polygonal plate, or an elliptical plate, and the connecting cylinder 214 may also be, but is not limited to, a circular cylinder, a polygonal cylinder, or an elliptical cylinder. Understandably, the camera assembly 100 is placed on the plane enclosed by the X and Y axes, and the optical axis L of the lens 50 is parallel to the Z axis.

[0032] The camera assembly 100 also includes a base 70, a cover 21, and a stator 20 disposed on the front side of the base 70. The lens 50 includes a housing 51 and a lens module disposed within the housing 51. The front side of the housing 51 has a light-transmitting hole 52 along the optical axis L. The axis of the lens module within the housing 51 is collinear with the optical axis L. The housing 51 is housed in the mounting space 202. In this invention, the front side refers to the surface facing the object side of the camera assembly 100, and the back side refers to the surface away from the object side of the camera assembly 100.

[0033] The base 70 includes a base body 71, a circuit board 73 disposed within the base body 71, and an image sensor 75 disposed on the front side of the base body 71. The circuit board 73 is electrically connected to the image sensor 75. The circuit board 73 is provided with a driver chip, an output interface, etc. The circuit board 73 is connected to a connector 78 via a flexible circuit board 76. The connector 78 is used to connect to an external power output terminal. The camera assembly 100 also includes three support balls 31 and two rows of connecting balls 33. The three support balls 31 are respectively disposed at one of the triangular parts of the base body 71. Specifically, two of the support balls 31 are located at opposite ends of the first anti-vibration mechanism 62, and the other support ball 31 is located at the end of the second anti-vibration mechanism 64 away from the first anti-vibration mechanism 62. The three support balls 31 are used to support the mover 40. The two rows of connecting balls 33 are respectively disposed at opposite ends of the third anti-vibration mechanism 65, and the two rows of connecting balls 33 are connected between the mover 40 and the stator 20.

[0034] like Figures 3-7 As shown, the first coil group 625 includes two first rectangular coils 6250 spaced apart from each other. The length direction of the first rectangular coil 6250 is parallel to the Y-axis direction. The two first rectangular coils 6250 are arranged along their length direction, that is, the two first rectangular coils 6250 are spaced apart along the Y-axis direction. The middle part of the first rectangular coil 6250 has a rectangular first inner cavity 6252, and the length direction of the first inner cavity 6252 is parallel to the length direction of the first rectangular coil 6250. The first electromagnetic sensing element on the first vibration damping mechanism 62 includes a first electromagnetic sensor 621 and a second electromagnetic sensor 623. The first electromagnetic sensor 621 is disposed between the two first rectangular coils 6250, and the second electromagnetic sensor 623 is disposed between the two first rectangular coils 6250. The inner cavity 2652 of one of the two first rectangular coils 6250; the second coil group 645 includes two second rectangular coils 6450 spaced apart from each other, the length direction of the second rectangular coils 6450 is parallel to the X-axis direction, and the two second rectangular coils 6450 are arranged along their length direction, that is, the two second rectangular coils 6450 are spaced apart along the X-axis direction; the middle part of the second rectangular coil 6450 has a rectangular second inner cavity 6452, the length direction of the second inner cavity 6452 is parallel to the length direction of the second rectangular coil 6450; the second electromagnetic sensing element on the second vibration damping mechanism 64 includes a third electromagnetic sensor 641, the third electromagnetic sensor 641 is disposed between the two second rectangular coils 6450.

[0035] The third coil group 655 is a third rectangular coil, the length direction of which is parallel to the X-axis. The third rectangular coil has a rectangular third inner cavity 6552 in its middle, the length direction of which is parallel to the length direction of the third rectangular coil. The third electromagnetic sensing element includes two fourth electromagnetic sensors 656 spaced apart from each other. Both fourth electromagnetic sensors 656 are housed within the third inner cavity 6552. One fourth electromagnetic sensor 656 is located near the middle of the third inner cavity 6552, and the other fourth electromagnetic sensor 656 is located at one end of the third inner cavity 6552. In this embodiment, the other fourth electromagnetic sensor 656 is located at the end of the third inner cavity 6552 furthest from the first vibration damping mechanism 62.

[0036] In this embodiment, the first electromagnetic sensor 621 is disposed between two first rectangular coils 6250, the second electromagnetic sensor 623 is disposed in the first inner cavity 6252 of the first rectangular coil 6250 away from the second vibration damping mechanism 64, and the third electromagnetic sensor 641 is disposed between two second rectangular coils 6450.

[0037] In other embodiments, a first electromagnetic sensor 621 is disposed between two first rectangular coils 6250, a second electromagnetic sensor 623 is disposed in the first inner cavity 6252 of the first rectangular coil 6250 near one end of the second vibration damping mechanism 64, and a third electromagnetic sensor 641 is disposed between two second rectangular coils 6450.

[0038] Optionally, the first electromagnetic sensor 621, the second electromagnetic sensor 623, and the third electromagnetic sensor 641 are all rectangular. The length direction of the first electromagnetic sensor 621 is perpendicular to the length direction of the first rectangular coil 6250, that is, the length direction of the first electromagnetic sensor 621 is parallel to the Z-axis; the length direction of the second electromagnetic sensor 623 is parallel to the length direction of the first rectangular coil 6250, that is, the length direction of the second electromagnetic sensor 623 is parallel to the Y-axis; and the length direction of the third electromagnetic sensor 641 is perpendicular to the length direction of the second rectangular coil 6450, that is, the length direction of the third electromagnetic sensor 641 is parallel to the X-axis. Optionally, the length of the first electromagnetic sensor 621 is equal to or less than the width of the first rectangular coil 6250, the length of the first electromagnetic sensor 621 is less than or equal to the length of the first inner cavity 6252, the width of the first electromagnetic sensor 621 is less than or equal to the width of the first inner cavity 6252, and the length of the third electromagnetic sensor 641 is less than or equal to the width of the second rectangular coil 6450. In this embodiment, the first electromagnetic sensor 621, the second electromagnetic sensor 623, and the third electromagnetic sensor 641 are all Hall sensors.

[0039] Optionally, the first magnet group 620 includes two spaced-apart first magnets 622 arranged along the Y-axis, and two first rectangular coils 6250 respectively facing the two first magnets 622; the second magnet group 640 includes two spaced-apart second magnets 642 arranged along the X-axis, and two second rectangular coils 6450 respectively facing the two second magnets 642. In this embodiment, the first magnets 622 are rectangular magnets, the length direction of which is parallel to the Y-axis, and the two rectangular magnets are spaced apart along their length direction; the second magnets 642 are rectangular magnets, the length direction of which is parallel to the X-axis, and the two rectangular magnets are spaced apart along their length direction.

[0040] The third magnet group 650 includes two third magnets 652 spaced apart from each other, arranged along the Z-axis. The two opposite sides of the third rectangular coil along its length are respectively opposite the two third magnets 652. In this embodiment, the third magnets 652 are rectangular magnets, and the length direction of the third magnets 652 is parallel to the X-axis. The two third magnets 652 are spaced apart along their width direction.

[0041] Optionally, the pole orientation of one first magnet 622 facing the corresponding first rectangular coil 6250 is opposite to the pole orientation of the other first magnet 622 facing the other first rectangular coil 6250; the pole orientation of one second magnet 642 facing the corresponding second rectangular coil 6450 is opposite to the pole orientation of the other second magnet 642 facing the other second rectangular coil 6450; and the pole orientation of one third magnet 652 facing the third rectangular coil is opposite to the pole orientation of the other third magnet 652 facing the third rectangular coil. It can be understood that if one first magnet 622 facing the corresponding first rectangular coil 6250 is the N pole, the other first magnet 622 facing the other first rectangular coil 6250 is the S pole; if one second magnet 642 facing the corresponding second rectangular coil 6450 is the N pole, the other second magnet 642 facing the other second rectangular coil 6450 is the S pole; and if one third magnet 652 facing the third rectangular coil is the N pole, the other third magnet 652 facing the third rectangular coil is the S pole.

[0042] In this embodiment, the side of the first magnet 622 facing the corresponding first rectangular coil 6250 near the end of the second vibration damping mechanism 64 is the S pole, and the opposite side of the first magnet 622 away from the first rectangular coil 6250 is the N pole; the side of the first magnet 622 facing the corresponding first rectangular coil 6250 away from the end of the second vibration damping mechanism 64 is the N pole, and the opposite side of the first magnet 622 away from the first rectangular coil 6250 is the S pole; the side of the second magnet 642 facing the corresponding second rectangular coil 6450 near the end of the first vibration damping mechanism 62 is the N pole. The opposite side of the second rectangular coil 6450 is the S pole; the side of the second magnet 642 facing the corresponding second rectangular coil 6450 away from the first vibration damping mechanism 62 is the S pole, and the opposite side of the second magnet 642 away from the second rectangular coil 6450 is the N pole; the side of the third magnet 652 facing the third rectangular coil near the base 70 is the S pole, and the opposite side of the third magnet 652 away from the third rectangular coil is the N pole; the side of the third magnet 652 facing the third rectangular coil away from the base 70 is the N pole, and the side of the third magnet 652 away from the third rectangular coil is the S pole.

[0043] In other embodiments, the side of the first magnet 622 facing the corresponding first rectangular coil 6250 near the end of the second vibration damping mechanism 64 is the N pole, and the opposite side of the first magnet 622 away from the first rectangular coil 6250 is the S pole; the side of the first magnet 622 facing the corresponding first rectangular coil 6250 away from the end of the second vibration damping mechanism 64 is the S pole, and the opposite side of the first magnet 622 away from the first rectangular coil 6250 is the N pole; the side of the second magnet 642 facing the corresponding second rectangular coil 6450 near the end of the first vibration damping mechanism 62 is the S pole. 2. The side opposite to the second rectangular coil 6450 is the N pole; the side of the second magnet 642 facing the corresponding second rectangular coil 6450 away from the first vibration damping mechanism 62 is the N pole, and the side of the second magnet 642 opposite to the second rectangular coil 6450 is the S pole; the side of the third magnet 652 facing the third rectangular coil near the base 70 is the N pole, and the side of the third magnet 652 opposite to the third rectangular coil is the S pole; the side of the third magnet 652 facing the third rectangular coil away from the base 70 is the S pole, and the side of the third magnet 652 opposite to the third rectangular coil is the N pole.

[0044] Optionally, the first magnet group 620 further includes a first isolation block 624, which is located between the two first magnets 622, and the first electromagnetic sensor 621 faces the first isolation block 624. In this embodiment, the first isolation block 624 is a rectangular block, and the length direction of the first isolation block 624 is parallel to the width direction of the first magnets 622, that is, the length direction of the first isolation block 624 is parallel to the Z-axis direction. The second magnet group 640 further includes a second isolation block 644, which is located between the two second magnets 642, and the third electromagnetic sensor 641 faces the second isolation block 644. In this embodiment, the second isolation block 644 is a rectangular block, and the length direction of the second isolation block 644 is parallel to the width direction of the second magnets 642, that is, the length direction of the second isolation block 644 is parallel to the Z-axis direction. The third magnet group 650 also includes a third isolation block 654, which is located between the two third magnets 652, and the two fourth electromagnetic sensors 656 are facing the third isolation block 654. In this embodiment, the third isolation block 654 is a rectangular block, and the length direction of the third isolation block 654 is parallel to the length direction of the third magnet 652, that is, the length direction of the third isolation block 654 is parallel to the X-axis direction.

[0045] Optionally, the first vibration damping mechanism 62 further includes a first positioning frame 626 connected to the mover 40, with two first magnets 622 positioned in the first positioning frame 626. Specifically, the first positioning frame 626 includes a rectangular first positioning piece 6261 and two first latches 6263. The first positioning piece 6261 is positioned on the mover 40, and the two first latches 6263 are respectively connected to opposite ends on one side of the first positioning piece 6261. The two first latches 6263 and the first positioning piece 6261 form a first positioning space, in which the first magnet assembly 620 is positioned. A first clearance opening 6265 is provided in the middle of the side of the first positioning piece 6261 where the first latches 6263 are located. The first clearance opening 6265 facilitates the installation or removal of the first magnet assembly 620 from the first positioning frame 626. The second vibration damping mechanism 64 includes a second positioning frame 646 connected to the mover 40, and two second magnets 642 positioned in the second positioning frame 646. Specifically, the second positioning frame 646 includes a rectangular second positioning piece 6461 and two second latches 6463. The second positioning piece 6461 is positioned on the mover 40, and the two second latches 6463 are respectively connected to opposite ends on one side of the second positioning piece 6461. The two second latches 6463 and the second positioning piece 6461 form a second positioning space, in which the second magnet assembly 640 is positioned. A second clearance opening 6465 is provided in the middle of the side of the second positioning piece 6461 where the second latches 6463 are located. The second clearance opening 6465 facilitates the installation or removal of the second magnet assembly 640 from the second positioning frame 646. The third vibration damping mechanism 65 also includes a third positioning frame 657 connected to the mover 40, and two third magnets 652 are positioned in the third positioning frame 657. Specifically, the third positioning frame 657 includes a rectangular third positioning piece 6571 and a third latch 6573. The third positioning piece 6571 is positioned in the mover 40, and the third latch 6573 is connected to the middle of one side of the third positioning piece 6571. The third positioning piece 6571 and the third latch 6573 form a third positioning space, and the third magnet group 650 is positioned in the third positioning space.

[0046] Optionally, the first electromagnetic sensor 621, the second electromagnetic sensor 623, and the first coil group 625 of the first vibration damping mechanism 62 are positioned on the stator 20 via the first connector; the third electromagnetic sensor 641 and the second coil group 645 of the second vibration damping mechanism 64 are positioned on the stator 20 via the second connector; and the third coil group 655 and the two fourth electromagnetic sensors 656 of the third vibration damping mechanism 65 are positioned on the stator 20 via the third connector 658.

[0047] like Figures 1-8As shown, when assembling the camera assembly 100, a first isolation block 624 is placed between two first magnets 622, and both the first isolation block 624 and the two first magnets 622 are positioned in a first positioning frame 626. The first positioning frame 626 is then installed on the first side of the mover 40. A second isolation block 644 is placed between two second magnets 642, and both the second isolation block 644 and the two second magnets 642 are positioned in a second positioning frame 646. The second positioning frame 646 is then installed on the second side of the mover 40. A third isolation block 654 is placed between two third magnets 652, and both the third isolation block 654 and the two third magnets 652 are positioned in a third positioning frame 657. The third positioning frame 657 is then installed on the third side of the mover 40, with the third positioning frame 657 facing the second positioning frame 646. The first electromagnetic... Sensor 621 is placed between two first rectangular coils 6250. A second electromagnetic sensor 623 is placed inside the cavity 6252 of one of the first rectangular coils 6250. The first electromagnetic sensor 621, the second electromagnetic sensor 623, and the two first rectangular coils 6250 are positioned on the first side of the stator 20 via a first connector. A third electromagnetic sensor 641 is placed between two second rectangular coils 6450. The third electromagnetic sensor 641 and the two second rectangular coils 6450 are positioned on the second side of the stator 20 via a second connector. Two fourth electromagnetic sensors 656 are respectively housed inside the cavity of a third coil group 655. The two fourth electromagnetic sensors and the third coil group 655 are positioned on the stator 20 via a third connector 658, so that the second vibration damping mechanism 64 faces the third vibration damping mechanism 65. Position the stator 20 and cover 21 on the front of the base 70, so that the lens 50 is housed in the mounting space 202 of the stator 20, such that the two first rectangular coils 6250 are respectively facing the two first magnets 622, the first electromagnetic sensor 621 is placed vertically and facing the first isolation block 624, and the second electromagnetic sensor 623 is placed horizontally in the inner cavity 6252 of one of the first rectangular coils 6250, and the second electromagnetic sensor 623 is facing the one of the first magnets 622; such that the two second rectangular coils 6450 are respectively facing the two second magnets 642, and the third electromagnetic sensor 641 is placed vertically and facing the second isolation block 644.

[0048] like Figures 9-13As shown, the optical image stabilization mechanism 60 of the camera assembly 100 of this application enables the single-layer ball bearing optical vibration damping motor to suppress the rolling or tumbling of the lens 50 and the carrier of the lens 50 on the plane enclosed by the X-axis and Y-axis, and can obtain a lower level of autofocus drift and electromagnetic interference of the coil magnet. Specifically, both the first anti-vibration mechanism 62 and the second anti-vibration mechanism 64 adopt a dual rectangular coil low-leakage magnetic design. The length direction of the first electromagnetic sensor 621 is parallel to the Z-axis and located between the two first rectangular coils 6250. The length direction of the third electromagnetic sensor 641 is parallel to the Z-axis and located between the two second rectangular coils 6450. The length direction of the second electromagnetic sensor 623 is parallel to the Y-axis and placed inside the cavity of one of the first rectangular coils 6250, or the length direction of the second electromagnetic sensor 623 is parallel to the X-axis and placed inside the cavity of one of the second rectangular coils 6450. The first electromagnetic sensor 621 is used to detect the displacement of the first magnet group 620 in the Y-axis direction, the second electromagnetic sensor 623 is used to detect the displacement of the first magnet group 620 in the X-axis direction, and the third electromagnetic sensor 641 is used to detect the displacement of the second magnet group 640 in the X-axis direction. An algorithm is used to suppress the rotation of the lens relative to the base 70. Figure 9 As shown, the first magnet group 620. Understandably, to prevent the lens 50 from rotating relative to the base 70, the first electromagnetic sensor 621 of the first anti-vibration mechanism 62 senses changes in magnetic field strength to detect displacement in the Y-axis direction; the second electromagnetic sensor 623 senses changes in magnetic field strength to detect displacement in the X-axis direction; and the third electromagnetic sensor 641 senses changes in magnetic field strength to detect displacement in the X-axis direction, which corresponds to detecting changes in the distance between the mover 40 and the surfaces of the first electromagnetic sensors 621, 623, and 641. When the lens 50 rotates, the distances sensed by the first electromagnetic sensors 621, 623, and 641 have differential derivatives. At this time, through algorithmic control, the distances sensed by the first electromagnetic sensors 621 and 623 are made consistent relative to the first and second electromagnetic sensors 621 and 623 respectively through closed-loop control, thereby correcting the rotation of the lens 50. Therefore, the electromagnetic sensor of the camera assembly 100 of this application uses an algorithm to suppress the rotation of the lens 50 and its carrier, and can achieve a lower level of autofocus drift and electromagnetic interference from the coil magnet.

[0049] Please see Figure 14The structure of the optical image stabilization mechanism 60a in the second embodiment of this application is similar to that of the optical image stabilization mechanism 60 in the first embodiment, except that the position of the second electromagnetic sensor 623 in the second embodiment is different from that in the first embodiment. Specifically, the first coil group 625 includes two first rectangular coils 6250 spaced apart from each other. The length direction of the first rectangular coils 6250 is parallel to the Y-axis direction, and the two first rectangular coils 6250 are arranged at intervals along their length direction. The electromagnetic sensing element on the first anti-vibration mechanism 62 only includes the first electromagnetic sensor 6250. 21. The first electromagnetic sensor 621 is disposed between two first rectangular coils 6250; the second coil group 645 includes two second rectangular coils 6450 spaced apart from each other, the length direction of the second rectangular coils 6450 is parallel to the X-axis direction, and the two second rectangular coils 6450 are arranged along their length direction; the electromagnetic sensing element on the second vibration damping mechanism 64 includes a second electromagnetic sensor 623 and a third electromagnetic sensor 641, the third electromagnetic sensor 641 is disposed between the two second rectangular coils 6450, and the second electromagnetic sensor 623 is disposed in the inner cavity 6452 of one of the two second rectangular coils 6450.

[0050] Optionally, the first electromagnetic sensor 621, the second electromagnetic sensor 623, and the third electromagnetic sensor 641 are all rectangular. The length direction of the first electromagnetic sensor 621 is perpendicular to the length direction of the first rectangular coil 6250. The second electromagnetic sensor 623 is housed in the inner cavity 6452 of the second rectangular coil 6450 near the first vibration damping mechanism 62. The length direction of the second electromagnetic sensor 623 is parallel to the length direction of the second rectangular coil 6450. The length direction of the third electromagnetic sensor 641 is perpendicular to the length direction of the second rectangular coil 6450.

[0051] The function and role of the optical image stabilization mechanism 60a in the second embodiment of this application are the same as those of the optical image stabilization mechanism 60 in the first embodiment, and will not be described again here.

[0052] Please see Figure 15The structure of the optical image stabilization mechanism 60b in the third embodiment of this application is similar to that of the optical image stabilization mechanism 60 in the first embodiment, except that the placement position of the second electromagnetic sensor 623 in the third embodiment is different from that in the first embodiment. Specifically, the first coil group 625 includes two first rectangular coils 6250 spaced apart from each other, the length direction of the first rectangular coils 6250 is parallel to the Y-axis direction, and the two first rectangular coils 6250 are arranged along their length direction; the electromagnetic sensing element on the first anti-vibration mechanism 62 only includes the first electromagnetic sensor 621. The first electromagnetic sensor 621 is disposed between two first rectangular coils 6250; the second coil group 645 includes two second rectangular coils 6450 spaced apart from each other, the length direction of the second rectangular coils 6450 is parallel to the X-axis direction, and the two second rectangular coils 6450 are arranged along their length direction; the electromagnetic sensing element on the second vibration damping mechanism 64 includes a second electromagnetic sensor 623 and a third electromagnetic sensor 641, the third electromagnetic sensor 641 is disposed between the two second rectangular coils 6450, and the second electromagnetic sensor 623 is disposed in the inner cavity 6452 of the second rectangular coil 6450 away from the first vibration damping mechanism 62.

[0053] Optionally, the first electromagnetic sensor 621, the second electromagnetic sensor 623, and the third electromagnetic sensor 641 are all rectangular. The length direction of the first electromagnetic sensor 621 is perpendicular to the length direction of the first rectangular coil 6250. The second electromagnetic sensor 623 is housed in the inner cavity 6452 of the second rectangular coil 6450, which is away from the first vibration damping mechanism 62. The length direction of the second electromagnetic sensor 623 is parallel to the length direction of the second rectangular coil 6450. The length direction of the third electromagnetic sensor 641 is perpendicular to the length direction of the second rectangular coil 6450.

[0054] The function of the optical image stabilization mechanism 60b in the third embodiment of this application is the same as that of the optical image stabilization mechanism 60 in the first embodiment, and will not be described again here.

[0055] Please see Figure 16 The present invention also provides an electronic device, which includes a housing 400, a motherboard 500 disposed within the housing 400, a display screen 600 disposed on the front of the housing 400, and a camera assembly 100. The camera assembly 100 is disposed within the housing 400, and the camera assembly 100 and the display screen 600 are electrically connected to the motherboard 500. In this embodiment, the electronic device is a mobile phone, and the camera assembly 100 is the front-facing camera of the mobile phone. Because the autofocus system of the camera assembly 100 reduces deviations or instability when attempting to maintain focus, the electronic device can accurately track the focus of the photographed image, thereby improving the image clarity. In other embodiments, the camera assembly 100 may also be a rear-facing camera.

[0056] In other embodiments, the camera assembly 100 may also be, but is not limited to, any electronic device that requires a lens, such as a tablet computer, display screen, smart TV, smart watch, or smart bracelet.

[0057] The above are the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the embodiments of the present invention, and these improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. An optical image stabilization mechanism for reducing focus drift of a camera assembly relative to its stator, characterized in that, The optical image stabilization mechanism includes: A first vibration damping mechanism is disposed on the X-axis of the camera assembly. The first vibration damping mechanism includes a first magnet group, a first coil group, and a first electromagnetic sensor. The first magnet group is disposed on a first side of the moving part, and the first coil group and the electromagnetic sensor are disposed on a first side of the stator. The first magnet group is directly opposite the first electromagnetic sensor and the first coil group. The first magnet group includes two spaced-apart first magnets and a first isolation block, with the first isolation block located between the two first magnets. The first coil group includes two spaced-apart first rectangular coils arranged along their length. The first electromagnetic sensor includes a first electromagnetic sensor and a second electromagnetic sensor. The first electromagnetic sensor is disposed between the two first rectangular coils, and the second electromagnetic sensor is disposed within the cavity of one of the two first rectangular coils. The first electromagnetic sensor and the second electromagnetic sensor are controlled via a closed loop to ensure that the distances between the two first magnets relative to the first electromagnetic sensor and the second electromagnetic sensor are consistent. The second vibration damping mechanism is disposed on the Y-axis of the camera assembly. The second vibration damping mechanism includes a second magnet group, a second coil group, and a second electromagnetic sensor. The second magnet group is disposed on the second side of the mover, and the second coil group and the second electromagnetic sensor are disposed on the second side of the stator, with the second magnet group directly opposite the second coil group and the second electromagnetic sensor. The second magnet group includes two spaced-apart second magnets and a second isolation block, with the second isolation block located between the two second magnets. The second coil group includes two spaced-apart second rectangular coils arranged along their length. The second electromagnetic sensor on the second vibration damping mechanism includes a third electromagnetic sensor, which is disposed between the two second rectangular coils.

2. The optical image stabilization mechanism according to claim 1, characterized in that, The first electromagnetic sensor, the second electromagnetic sensor, and the third electromagnetic sensor are all rectangular. The length direction of the first electromagnetic sensor is perpendicular to the length direction of the first rectangular coil, the length direction of the second electromagnetic sensor is parallel to the length direction of the first rectangular coil, and the length direction of the third electromagnetic sensor is perpendicular to the length direction of the second rectangular coil.

3. The optical image stabilization mechanism according to claim 1, characterized in that, Two first magnets are arranged along the Y-axis, and two first rectangular coils are respectively facing the two first magnets; two second magnets are arranged along the X-axis, and two second rectangular coils are respectively facing the two second magnets.

4. The optical image stabilization mechanism according to claim 3, characterized in that, The polar orientation of one of the first magnets facing the corresponding first rectangular coil is opposite to that of the other first magnet facing the other first rectangular coil; the polar orientation of one of the second magnets facing the corresponding second rectangular coil is opposite to that of the other second magnet facing the other second rectangular coil.

5. The optical image stabilization mechanism according to claim 3, characterized in that, One of the first magnets faces the corresponding first rectangular coil and is the N pole, while the other first magnet faces the other first rectangular coil and is the S pole; one of the second magnets faces the corresponding second rectangular coil and is the N pole, while the other second magnet faces the other second rectangular coil and is the S pole.

6. The optical image stabilization mechanism according to claim 3, characterized in that, The first electromagnetic sensor is directly opposite the first isolation block.

7. The optical image stabilization mechanism according to claim 3, characterized in that, The third electromagnetic sensor is positioned opposite the second isolation block.

8. The optical image stabilization mechanism according to claim 3, characterized in that, The first vibration damping mechanism further includes a first positioning frame connected to the moving part, and two first magnets positioned in the first positioning frame; the second vibration damping mechanism includes a second positioning frame connected to the moving part, and two second magnets positioned in the second positioning frame.

9. The optical image stabilization mechanism according to claim 1, characterized in that, The first electromagnetic sensor is used to detect the displacement of the first magnet group in the Y-axis direction, the second electromagnetic sensor is used to detect the displacement of the first magnet group in the X-axis direction, and the third electromagnetic sensor is used to detect the displacement of the second magnet group in the X-axis direction.

10. The optical image stabilization mechanism according to claim 1, characterized in that, Alternatively, the electromagnetic sensing element on the first vibration damping mechanism may include a first electromagnetic sensor disposed between the two first rectangular coils; the electromagnetic sensing element on the second vibration damping mechanism may include a second electromagnetic sensor and a third electromagnetic sensor disposed between the two second rectangular coils, and the second electromagnetic sensor disposed within the cavity of one of the two second rectangular coils.

11. The optical image stabilization mechanism according to claim 10, characterized in that, The first electromagnetic sensor, the second electromagnetic sensor, and the third electromagnetic sensor are all rectangular. The length direction of the first electromagnetic sensor is perpendicular to the length direction of the first rectangular coil. The second electromagnetic sensor is housed in the inner cavity of the second rectangular coil near the first vibration damping mechanism. The length direction of the second electromagnetic sensor is parallel to the length direction of the second rectangular coil. The length direction of the third electromagnetic sensor is perpendicular to the length direction of the second rectangular coil.

12. The optical image stabilization mechanism according to claim 10, characterized in that, The first electromagnetic sensor, the second electromagnetic sensor, and the third electromagnetic sensor are all rectangular. The length direction of the first electromagnetic sensor is perpendicular to the length direction of the first rectangular coil. The second electromagnetic sensor is housed in the cavity of the second rectangular coil away from the first vibration damping mechanism. The length direction of the second electromagnetic sensor is parallel to the length direction of the second rectangular coil. The length direction of the third electromagnetic sensor is perpendicular to the length direction of the second rectangular coil.

13. A camera assembly, characterized in that, The camera assembly includes a stator, a mover disposed in the stator, a lens disposed on the mover, and an optical image stabilization mechanism as described in any one of claims 1-12, wherein the optical image stabilization mechanism is disposed between the stator and the mover.

14. An electronic device, characterized in that, It includes a housing, a motherboard disposed within the housing, and a camera assembly as described in claim 13, wherein the camera assembly is disposed within the housing and is electrically connected to the motherboard.

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