Magnetic driving device, camera module and electronic equipment

Abstract

The invention belongs to the technical field of camera shooting, and discloses a magnetic driving device, a camera shooting module and electronic equipment, the magnetic driving device comprises a magnet assembly and a coil assembly, the magnet assembly comprises a plurality of first main magnets, a plurality of second main magnets and a plurality of auxiliary magnets, and the polarities of the first main magnets and the second main magnets are opposite. The multiple first main magnets and the multiple second main magnets are alternately arranged in the first annular direction, auxiliary magnets are arranged between any adjacent first main magnet and second main magnet in the first annular direction, and the first main magnets, the second main magnets and the auxiliary magnets are matched with one another to form a Halbach array; the coil assembly is arranged on the magnetic field enhancement side of the Halbach array, the coil assembly and the magnet assembly are arranged in a spaced mode, the coil assembly can interact with the magnet assembly when powered on, and the coil assembly and the magnet assembly move relatively. According to the invention, the interference degree between the magnetic driving devices or between the magnetic driving devices and other magnetic parts can be reduced, and the camera module has high imaging quality.

Description

Technical Field

[0001] The present invention relates to the field of camera technology, and in particular to a magnetic drive device, a camera module and an electronic device. Background Art

[0002] The cameras in electronic products such as laptops, tablets, and mobile phones require multiple degrees of freedom to support functions such as autofocus and optical image stabilization, thereby improving the quality and effect of captured images and videos. Currently, cameras are usually driven by motors, which can achieve spatial translation.

[0003] In the prior art, the motor used to drive the camera includes a magnet and a coil. The magnet is usually connected to the camera, and the coil is usually connected to the fixed structure of the electronic product. The positional relationship between the magnet and the coil satisfies that when the coil is energized, the magnet and the coil can produce relative displacement, thereby enabling the camera to move relative to the housing. The magnet adopts a bipolar magnet configuration. Specifically, if the magnet and the coil are arranged relative to each other in the Z direction, the magnet has an N pole and an S pole at both ends of the Y direction perpendicular to the Z direction, and the N pole and the S pole at the same end of the magnet in the Y direction are arranged relative to each other in the Z direction. In this way, the magnet has magnetic lines of force on both sides of the Z direction, so that the magnet has a magnetic field on both sides of the Z direction.

[0004] However, when an electronic product is equipped with a large number of cameras, in order to ensure the miniaturization of the electronic product, there is a situation where the two motors used to drive the movement of the two cameras are arranged relative to each other in the Z direction, resulting in a very close distance between the two magnets, which in turn leads to the problem of magnetic field influence between the motors. The interference is more serious, causing the magnets to displace or shake, affecting the imaging quality of the camera. Summary of the Invention

[0005] The first object of the present invention is to provide a magnetic drive device to solve the technical problem of mutual influence between magnetic drive devices existing in the prior art.

[0006] The second object of the present invention is to provide a camera module with high imaging quality.

[0007] The third object of the present invention is to provide an electronic device with better imaging effect.

[0008] As conceived above, the technical solution adopted by the present invention is:

[0009] A magnetic drive device comprising:

[0010] A magnet assembly comprising a plurality of first main magnets, a plurality of second main magnets, and a plurality of secondary magnets, wherein the first main magnets and the second main magnets have opposite polarities and are alternately arranged along a first circumferential direction, wherein the secondary magnets are arranged between any adjacent first main magnets and second main magnets in the first circumferential direction, and wherein the first main magnets, the second main magnets, and the secondary magnets cooperate with each other to form a Halbach array;

[0011] The coil assembly is arranged on the magnetic field enhancement side of the Halbach array and is spaced apart from the magnet assembly. When the coil assembly is energized, it can interact with the magnet assembly and the coil assembly and the magnet assembly can move relative to each other.

[0012] In one embodiment, the coil assembly includes multiple anti-shake coils, which are arranged at intervals along the first circumferential direction; each of the anti-shake coils at least partially overlaps with the magnet assembly in the first direction; wherein the first direction is the thickness direction of the magnet assembly.

[0013] In one embodiment, the anti-shake coils are the same in number as the secondary magnets and correspond one to one; the projection of the anti-shake coils along the first direction on the characteristic plane is a first projection, and the projection of the first main magnet adjacent to the secondary magnet corresponding to the anti-shake coils along the first direction on the characteristic plane is a second projection, and the first projection and the second projection at least partially overlap; wherein, the characteristic plane is a plane perpendicular to the first direction.

[0014] In one embodiment, the anti-shake coils are the same in number as the secondary magnets and correspond one to one; the projection of the anti-shake coils along the first direction on the characteristic plane is a first projection, and the projection of the second main magnet adjacent to the secondary magnet corresponding to the anti-shake coil along the first direction on the characteristic plane is a third projection, and the first projection and the third projection at least partially overlap; wherein, the characteristic plane is a plane perpendicular to the first direction.

[0015] In one embodiment, the anti-shake coils are the same in number as the secondary magnets and correspond one to one; the projection of the anti-shake coils along the first direction on the characteristic plane is a first projection, and the projection of the secondary magnets corresponding to the anti-shake coils along the first direction on the characteristic plane is a fourth projection, and the first projection and the fourth projection at least partially overlap; wherein, the characteristic plane is a plane perpendicular to the first direction.

[0016] In one embodiment, the surface of the anti-shake coil facing the center of the coil assembly is a concave avoidance curved surface.

[0017] In one embodiment, the coil assembly includes a first anti-shake coil and a second anti-shake coil arranged opposite to each other in the second direction, and a third anti-shake coil and a fourth anti-shake coil arranged opposite to each other in the third direction;

[0018] When the first anti-shake coil and the second anti-shake coil are energized and the third anti-shake coil and the fourth anti-shake coil are not energized, the coil assembly and the magnet assembly move relative to each other in the third direction; when the third anti-shake coil and the fourth anti-shake coil are energized and the first anti-shake coil and the second anti-shake coil are not energized, the coil assembly and the magnet assembly move relative to each other in the second direction.

[0019] In one embodiment, the coil assembly includes a plurality of anti-shake coils. When the plurality of anti-shake coils are energized at the same time, the coil assembly and the magnet assembly rotate relative to each other.

[0020] In one embodiment, the secondary magnet contacts the adjacent first main magnet; and / or the secondary magnet contacts the adjacent second main magnet.

[0021] In one embodiment, the first main magnet has a first end face and a second end face arranged at an angle, the secondary magnet adjacent to the first main magnet has a third end face and a first side face, the first end face is parallel to and in contact with the third end face, and the second end face is coplanar with the first side face;

[0022] and / or,

[0023] The second main magnet has a fourth end face and a fifth end face set at an angle, the auxiliary magnet adjacent to the second main magnet has a sixth end face and a first side face, the fourth end face is parallel to and in contact with the sixth end face, and the fifth end face is coplanar with the first side face.

[0024] A camera module includes the magnetic drive device as described above, and the camera module also includes a lens, which is connected to the magnet assembly or the coil assembly. The coil assembly can interact with the magnet assembly when energized, and the coil assembly and the magnet assembly move relative to each other to drive the lens to move in the anti-shake direction.

[0025] In one embodiment, the camera module also includes a housing and a lens holder suspended in the housing, the lens is mounted on the lens holder, and at least a portion of the lens extends from the housing; the magnetic drive device is disposed in the housing, and the magnet assembly is disposed on the lens holder, and the coil assembly is connected to the housing.

[0026] In one embodiment, the lens holder includes a holder body and a plurality of limiting structures arranged on one side of the holder body, and the plurality of limiting structures are arranged at intervals along the first circumferential direction to cooperate with the holder body to form a limiting space, and at least a portion of the magnet assembly is located in the limiting space and is connected to the limiting structure.

[0027] In one embodiment, the coil assembly is connected to the first shell wall of the housing, the limiting structure is provided with a first groove on the surface facing the first shell wall, and the camera module further includes a first rolling element rotatably placed in the first groove and in contact with the first shell wall.

[0028] In one embodiment, the lens holder is provided with a limiting groove, and at least a portion of the magnet assembly is placed in the limiting groove.

[0029] In one embodiment, the lens holder is provided with a protrusion, the protrusion is provided with a mounting hole, and the lens is mounted in the mounting hole; the magnet assembly is sleeved on the outer periphery of the protrusion, and the surface of the protrusion facing the magnet assembly is an inclined surface.

[0030] In one embodiment, the camera module also includes a focusing mechanism, which is suspended in the housing and includes a focusing magnet, a focusing coil and a focusing connector. One of the focusing magnet and the focusing coil is connected to the housing, and the other is connected to the focusing connector, which is connected to the lens holder. The focusing magnet and the focusing coil cooperate with each other to drive the focusing connector to move relative to the housing in a focusing direction.

[0031] In one embodiment, the focusing connector includes a first connecting portion and a second connecting portion that are vertically connected, the first connecting portion is arranged on a side of the lens holder facing away from the first shell wall of the outer shell and is connected to the lens holder, and the focusing coil or the focusing magnet is connected to the second connecting portion.

[0032] In one embodiment, the camera module also includes a circuit board assembly connected to the shell, the circuit board assembly includes a first circuit board and a second circuit board, the first circuit board is arranged between the lens holder and the first shell wall, and the first circuit board is provided with a through hole, the lens is passed through the through hole, and the coil assembly is electrically connected to the first circuit board; the second circuit board is bent relative to the first circuit board, and the focusing coil is electrically connected to the second circuit board.

[0033] An electronic device, comprising the magnetic drive device as described above; or, the electronic device comprising the camera module as described above.

[0034] Beneficial effects of the present invention:

[0035] The first main magnet, the second main magnet and the auxiliary magnet of the magnet assembly cooperate with each other to form a Halbach array, so that the magnetic field strength of the magnet assembly can be concentrated on one side, that is, the strength of the magnetic field enhancement side of the magnet assembly will be greater than the magnetic field strength on the other side. The coil assembly is arranged on the magnetic field enhancement side of the Halbach array. On the one hand, it can achieve the purpose of reducing the magnetic resistance of the magnetic circuit, thereby increasing the interaction force between the magnet assembly and the coil assembly, so that the thrust generated by the magnetic drive device is larger; on the other hand, the magnet assembly has a weak magnetic field side. Placing other magnetic components of the electronic device close to the weak magnetic field side of the magnet assembly can reduce the influence and interference of the magnetic drive device on the magnetic components, and can also avoid interference of other magnetic components on the magnetic drive device, ensuring that the magnetic drive device and the magnetic components can work normally, with high reliability. When the magnetic drive device is applied to the camera module, the camera module can have high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0037] Figure 1 is a top view of a magnetic drive device provided by an embodiment of the present invention;

[0038] Figure 2 is an exploded view of a magnetic drive device provided by an embodiment of the present invention;

[0039] Figure 3 is a front view of a magnetic drive device provided by an embodiment of the present invention;

[0040] Figure 4 is a perspective view of a magnetic drive device provided by an embodiment of the present invention;

[0041] Figure 5 is a schematic structural diagram of a magnet assembly provided by an embodiment of the present invention;

[0042] Figure 6 is an exploded view of a magnet assembly provided by an embodiment of the present invention;

[0043] Figure 7 1 is a schematic structural diagram of a camera module provided by an embodiment of the present invention;

[0044] Figure 8 is an exploded view of a camera module provided by an embodiment of the present invention;

[0045] Figure 9 Schematic diagram of the structure of a portion of a camera module provided by an embodiment of the present invention;

[0046] Figure 10 This is an exploded view of a portion of a camera module provided by an embodiment of the present invention;

[0047] Figure 11 is a first cross-sectional view of a camera module provided by an embodiment of the present invention;

[0048] Figure 12 is a second cross-sectional view of the camera module provided by an embodiment of the present invention;

[0049] Figure 13 is a schematic structural diagram of an inner support member provided by an embodiment of the present invention;

[0050] Figure 14 It is a structural schematic diagram of a focus connector provided by an embodiment of the present invention.

[0051] In the picture:

[0052] 1. Magnet assembly; 11. First main magnet; 111. First end surface; 112. Second end surface; 12. Second main magnet; 121. Fourth end surface; 122. Fifth end surface; 13. Secondary magnet; 131. Third end surface; 132. First side surface; 133. Sixth end surface;

[0053] 2. Coil assembly; 21. Anti-shake coil; 211. Avoidance surface; 22. First anti-shake coil; 23. Second anti-shake coil; 24. Third anti-shake coil; 25. Fourth anti-shake coil;

[0054] 100, lens;

[0055] 200, outer shell; 210, first shell wall; 2101, lens hole; 220, bottom shell; 230, upper shell;

[0056] 300, lens holder; 310, holder body; 320, limiting structure; 321, first groove; 330, limiting slot; 340, protrusion; 341, mounting hole; 342, first side surface; 343, second side surface; 344, third side surface;

[0057] 400, first rolling element;

[0058] 500, focusing mechanism; 510, focusing magnet; 520, focusing coil; 530, focusing connector; 531, first connecting portion; 532, second connecting portion; 5321, first V-shaped groove;

[0059] 600, circuit board assembly; 610, first circuit board; 611, through hole; 620, second circuit board;

[0060] 700, inner support member; 710, support plate; 720, first column; 721, second V-shaped groove; 730, second column;

[0061] 800, second rolling element;

[0062] X, third direction; Y, second direction; Z, first direction. DETAILED DESCRIPTION

[0063] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the drawings only show portions relevant to the present invention, not all of them.

[0064] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present invention. Therefore, appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0065] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0066] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0067] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0068] In the description of this embodiment, terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate description and simplify operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used only to distinguish in the description and have no special meaning.

[0069] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be an element located in the middle.

[0070] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0071] This embodiment provides a magnetic drive device that can be used in equipment such as camera modules to drive movable parts with freedom in the camera module. The magnetic drive device provided in this embodiment can achieve a strong magnetic field strength on one side and a weak magnetic field strength on the other side, thereby reducing the impact on other magnetic parts and having high reliability.

[0072] For example, Figures 1 to 6As shown, the magnet assembly 1 includes a plurality of first main magnets 11, a plurality of second main magnets 12, and a plurality of auxiliary magnets 13. The first main magnets 11 and the second main magnets 12 have opposite polarities. For example, when the first main magnet 11 is an N magnet and the second main magnet 12 is an S magnet, it is understood that the first main magnet 11 can also be an S magnet and the second main magnet 12 can be an N magnet. Optionally, the plurality of first main magnets 11, the plurality of second main magnets 12, and the plurality of auxiliary magnets 13 are arranged in the same layer to reduce the thickness of the magnet assembly 1.

[0073] like Figure 2 As shown, multiple first main magnets 11 and multiple second main magnets 12 are alternately arranged along the first circumferential direction, and a secondary magnet 13 is provided between any adjacent first main magnets 11 and second main magnets 12 in the first circumferential direction, so that the first main magnets 11, the second main magnets 12, and the secondary magnets 13 cooperate with each other to form a Halbach array. The Halbach array in this embodiment is annular. It should be noted that one or more secondary magnets 13 can be provided between the first main magnet 11 and the second main magnet 12. In this embodiment, a secondary magnet 13 is provided between the first main magnet 11 and the second main magnet 12.

[0074] For ease of understanding, this embodiment describes the Halbach array, which is a magnet structure that achieves directional enhancement of the magnetic field through a special arrangement of magnets. Specifically, the core principle of the Halbach array is to significantly enhance the magnetic field on one side and almost eliminate it on the other side through a special arrangement of permanent magnets. In this embodiment, the side of the Halbach array with enhanced magnetic field is called the magnetic field enhancement side, and the other side is called the weak magnetic field side. For example, in Figure 3 The upper side of the magnet assembly 1 in the shown orientation is the magnetic field enhancement side, and the lower side is the magnetic field weakening side. The design of the Halbach array requires periodic changes in the magnetization directions of adjacent magnets, achieving directional enhancement through magnetic field superposition and cancellation effects.

[0075] It should be noted that to form a Halbach array, the magnetization directions of the first main magnet 11 and the secondary magnet 13 adjacent to each other in the first ring direction are different, specifically perpendicular to each other. Similarly, the magnetization directions of the second main magnet 12 and the secondary magnet 13 are also different, specifically perpendicular to each other.

[0076] The magnetization directions of the first main magnet 11 and the second main magnet 12 are opposite.

[0077] The coil assembly 2 in this embodiment is arranged on the magnetic field enhancement side of the Halbach array and is spaced apart from the magnet assembly 1. When the coil assembly 2 is energized, it can interact with the magnet assembly 1, and the coil assembly 2 and the magnet assembly 1 move relative to each other. In this way, the components that need to move in the electronic device are connected to the coil assembly 2 or the magnet assembly 1, and the coil assembly 2 or the magnet assembly 1 can drive the components that need to move to move to achieve the corresponding functions. It should be noted that the special arrangement of magnets by the Halbach array is equivalent to reducing the magnetic resistance of the magnetic circuit on the magnetic field enhancement side of the Halbach array, so that more magnetic lines of force can pass through the magnetic field enhancement side.

[0078] In one embodiment, the coil assembly 2 may be fixed and the magnet assembly 1 may be movable relative to the coil assembly 2. In other embodiments, the magnet assembly 1 may be fixed and the coil assembly 2 may be movable relative to the magnet assembly 1.

[0079] In the magnetic drive device provided in this embodiment, the first main magnet 11, the second main magnet 12 and the auxiliary magnet 13 of the magnet assembly 1 cooperate with each other to form a Halbach array, so that the magnetic field strength of the magnet assembly 1 can be concentrated on one side, that is, the strength of the magnetic field enhancement side of the magnet assembly 1 will be greater than the magnetic field strength on the other side. The coil assembly 2 is arranged on the magnetic field enhancement side of the Halbach array. On the one hand, it can achieve the purpose of reducing the magnetic resistance of the magnetic circuit, thereby increasing the interaction force between the magnet assembly 1 and the coil assembly 2, so that the thrust generated by the magnetic drive device is larger; on the other hand, the magnet assembly 1 has a weak magnetic field side. Placing other magnetic components of the electronic device close to the weak magnetic field side of the magnet assembly 1 can reduce the influence and interference of the magnetic drive device on the magnetic components, and can also avoid interference of other magnetic components on the magnetic drive device, ensuring that the magnetic drive device and the magnetic components can work normally, with high reliability. When the magnetic drive device is applied to the camera module, the camera module can have high imaging quality.

[0080] Optionally, when the electronic device has two magnetic drive devices, the weak magnetic field sides of the two magnetic drive devices are arranged to face each other, and the two magnetic field enhancement sides are arranged to face each other, so as to reduce mutual influence and interference between the two magnetic drive devices.

[0081] In this embodiment, the magnet assembly 1 is arranged in a ring shape, so that the size of the magnet assembly 1 in the length direction or the width direction of the magnetic drive device is not too large, which is conducive to the miniaturization of the magnetic drive device. It is also possible to arrange more first main magnets 11, auxiliary magnets 13 and second main magnets 12 in a limited space, thereby providing a larger driving force to be suitable for a heavier lens 100.

[0082] In some optional embodiments, such as Figure 2As shown, the coil assembly 2 includes multiple anti-shake coils 21, which are spaced apart along a first circumferential direction. That is, the arrangement direction of the multiple anti-shake coils 21 is the same as the arrangement direction of the first main magnet 11, the secondary magnet 13, and the second main magnet 12. Each anti-shake coil 21 at least partially overlaps with the magnet assembly 1 in the first direction Z. That is, each anti-shake coil 21 at least partially opposes the magnet assembly 1 in the first direction Z. The first direction Z is the thickness direction of the magnet assembly 1. It should be noted that each anti-shake coil 21 at least partially overlaps with the magnet assembly 1 in the first direction Z can be understood as: the projection of the anti-shake coil 21 along the first direction Z on a plane perpendicular to the first direction Z at least partially overlaps with the projection of the magnet assembly 1 along the first direction Z on a plane perpendicular to the first direction Z. That is, the anti-shake coil 21 is not staggered with the magnet assembly 1 in the first direction Z.

[0083] By providing multiple anti-shake coils 21, the magnetic field of the magnet assembly 1 on the magnetic field-enhancing side can be fully utilized to generate a greater driving force. By arranging each anti-shake coil 21 to at least partially overlap with the magnet assembly 1 in the first direction Z, the space on one side of the magnet assembly 1 in the first direction Z can be fully utilized. Compared to a staggered arrangement, the length and width of the magnetic drive device can be reduced, thereby utilizing the miniaturization of the magnetic drive device.

[0084] It should be noted that the coil assembly 2 and the magnet assembly 1 cooperate with each other to achieve drive in a direction perpendicular to the first direction Z. At this time, when the magnetic drive device is used in the camera module, the magnetic drive device can achieve anti-shake.

[0085] In one embodiment, the number of anti-shake coils 21 and the number of secondary magnets 13 are the same and they correspond one to one. The projection of the anti-shake coil 21 along the first direction Z on the characteristic plane is the first projection, and the projection of the first main magnet 11 adjacent to the secondary magnet 13 corresponding to the anti-shake coil 21 along the first direction Z on the characteristic plane is the second projection, and the first projection and the second projection at least partially overlap. It should be noted that the characteristic plane is a plane perpendicular to the first direction Z. The characteristic plane in this embodiment is a virtual plane for describing the projection, and is not a real plane. Figure 4 It can be seen from the figure that the projections of one end of the anti-shake coil 21 and one end of the first main magnet 11 in the first direction Z have an overlapping portion.

[0086] By arranging for the first and second projections to at least partially overlap, the size of the anti-shake coil 21 can be increased, allowing for a larger current to flow through the anti-shake coil 21, thereby increasing the driving force generated by the magnetic drive device. Furthermore, the magnetic flux lines generated by the adjacent first and second main magnets 11, 12 travel from one end of the first and second main magnets 11, 12, across the secondary magnet 13 between them, and then back to the other end of the first and second main magnets 11, 12. In other words, the magnetic flux density at both the end of the first main magnet 11 near the secondary magnet 13 and the end of the second main magnet 12 near the secondary magnet 13 are both very high. At least a portion of the anti-shake coil 21 is aligned with the end of the first main magnet 11 near the secondary magnet 13, resulting in a high magnetic flux density passing through the anti-shake coil 21. Based on the Lorentz force calculation formula, this generates a large driving force between the anti-shake coil 21 and the magnet assembly 1.

[0087] Optionally, the projection of the anti-shake coil 21 along the first direction Z on the characteristic plane is a first projection, and the projection of the second main magnet 12 adjacent to the secondary magnet 13 corresponding to the anti-shake coil 21 along the first direction Z on the characteristic plane is a third projection, and the first projection and the third projection at least partially overlap.

[0088] Similar to the first main magnet 11, by arranging the first and third projections to at least partially overlap, the size of the anti-shake coil 21 can be increased, thereby increasing the current flowing through the anti-shake coil 21 and thereby enhancing the driving force generated by the magnetic drive device. Furthermore, the magnetic flux lines generated by the adjacent first and second main magnets 11, 12 travel from one end of the first and second main magnets 11, 12, across the secondary magnet 13 between them, and then back to the other end of the first and second main magnets 11, 12. In other words, the magnetic flux density at both the end of the first main magnet 11 near the secondary magnet 13 and the end of the second main magnet 12 near the secondary magnet 13 are both very high. At least a portion of the anti-shake coil 21 can be aligned with the end of the second main magnet 12 near the secondary magnet 13, resulting in a high magnetic flux density passing through the anti-shake coil 21. According to the Lorentz force calculation formula, this generates a strong driving force between the anti-shake coil 21 and the magnet assembly 1.

[0089] Exemplarily, one end of the anti-shake coil 21 is opposite to the first main magnet 11 in the first direction Z, and the other end is opposite to the second main magnet 12 in the first direction Z, so that a greater driving force can be generated between the anti-shake coil 21 and the magnet assembly 1.

[0090] In one possible implementation manner, the projection of the anti-shake coil 21 along the first direction Z on the characteristic plane is a first projection, and the projection of the secondary magnet 13 corresponding to the anti-shake coil 21 along the first direction Z on the characteristic plane is a fourth projection, and the first projection and the fourth projection at least partially overlap.

[0091] By arranging the first projection and the corresponding fourth projection to at least partially overlap, the anti-shake coil 21 can be located on one side of the secondary magnet 13 and arranged directly opposite the secondary magnet 13 in the first direction Z, thereby fully utilizing the space on one side of the secondary magnet 13. In addition, the direction of movement of the magnetic flux lines generated by the adjacent first main magnet 11 and second main magnet 12 is to emanate from one of the first main magnet 11 and the second main magnet 12, cross the secondary magnet 13 between the two, and then return to the other of the first main magnet 11 and the second main magnet 12. The anti-shake coil 21 is provided with a magnetic field enhancement side cut opposite the secondary magnet 13, so that more magnetic flux lines can pass through the anti-shake coil 21, thereby increasing the interaction force between the anti-shake coil 21 and the magnet assembly 1, so that the magnetic drive device can have a greater driving force.

[0092] Alternatively, as Figure 2 As shown, the surface of the anti-shake coil 21 facing the center of the coil assembly 2 is a concave avoidance curved surface 211. The avoidance curved surface 211 can be used to avoid the lens 100, so that the size of the anti-shake coil 21 can be larger without affecting the installation position of the lens 100.

[0093] In some optional embodiments, such as Figure 4 As shown, the coil assembly 2 includes four anti-shake coils 21, which are a first anti-shake coil 22 and a second anti-shake coil 23 arranged opposite to each other in the second direction Y, and a third anti-shake coil 24 and a fourth anti-shake coil 25 arranged opposite to each other in the third direction X. The first anti-shake coil 22, the fourth anti-shake coil 25, the second anti-shake coil 23 and the third anti-shake coil 24 are arranged opposite to each other in the third direction X. Figure 4 The directions shown are arranged in sequence in a clockwise direction.

[0094] When the first anti-shake coil 22 and the second anti-shake coil 23 are energized, and the third anti-shake coil 24 and the fourth anti-shake coil 25 are deenergized, the coil assembly 2 and the magnet assembly 1 move relative to each other in the third direction X. That is, the coil assembly 2 and the magnet assembly 1 cooperate to generate a driving force in the third direction X. By providing two anti-shake coils, the first anti-shake coil 22 and the second anti-shake coil 23, the driving force generated in the third direction X can be increased with higher reliability.

[0095] When the third and fourth anti-shake coils 24 and 25 are energized, and the first and second anti-shake coils 22 and 23 are deenergized, the coil assembly 2 and the magnet assembly 1 move relative to each other in the second direction Y. That is, the coil assembly 2 and the magnet assembly 1 cooperate to generate a driving force in the second direction Y. Providing two anti-shake coils, the third and fourth anti-shake coils 24 and 25 , increases the driving force generated in the second direction Y and provides higher reliability.

[0096] In this embodiment, by providing a first anti-shake coil 22, a second anti-shake coil 23, a third anti-shake coil 24 and a fourth anti-shake coil 25, driving forces in the positive and negative directions of the second direction Y and the positive and negative directions of the third direction X can be provided. When the magnetic drive device is applied to the camera module, anti-shake of the camera module can be achieved.

[0097] In some optional embodiments, the coil assembly 2 includes multiple anti-shake coils 21. When the multiple anti-shake coils 21 are energized simultaneously, the coil assembly 2 and the magnet assembly 1 rotate relative to each other. That is, one of the coil assembly 2 and the magnet assembly 1 rotates about an axis in the first direction Z. When the multiple anti-shake coils 21 are energized simultaneously, because the multiple anti-shake coils 21 are spaced apart along the first circumferential direction, the positional interaction of the multiple anti-shake coils 21 can generate torque, thereby generating a driving force for rotation.

[0098] It should be noted that the rotation of the coil assembly 2 and the magnet assembly 1 can be understood as one of the coil assembly 2 and the magnet assembly 1 rotating while the other remains stationary. The rotation axis passes through the center of the coil assembly 2 or the magnet assembly 1 to prevent displacement in the second direction Y and the third direction X during rotation.

[0099] For example, when the coil assembly 2 includes a first anti-shake coil 22, a second anti-shake coil 23, a third anti-shake coil 24 and a fourth anti-shake coil 25, the first anti-shake coil 22, the second anti-shake coil 23, the third anti-shake coil 24 and the fourth anti-shake coil 25 are energized at the same time, and can generate a driving force for rotation.

[0100] Corresponding to the coil assembly 2, as Figure 5 As shown, the magnet assembly 1 may include two first main magnets 11, two second main magnets 12 and four auxiliary magnets 13. The arrangement of the two first main magnets 11, the two second main magnets 12 and the four auxiliary magnets 13 is as follows: Figure 2 As shown. The first main magnet 11 is an N magnet, the second main magnet 12 is an S magnet, and the magnetic lines of force emitted by the first main magnet 11 cross the auxiliary magnet 13 and return to the second main magnet 12. Figure 5 The direction indicated by the thick black arrow is the magnetization direction of the above magnets.

[0101] Optionally, this embodiment provides a method for controlling the power supply of a coil assembly, Figure 5 The magnet assembly shown is specifically shown in Table 1. In the table, +X represents the positive direction of the second direction, -X represents the negative direction of the second direction; +Y represents the positive direction of the third direction, -Y represents the positive direction of the third direction; +Z represents counterclockwise rotation, -Z represents counterclockwise rotation. The "+" and "-" corresponding to the anti-shake coil represent opposite current directions. For example, in Figure 4 In the figure, “+” indicates that the current direction in the anti-shake coil is clockwise, “-” indicates that the current direction in the anti-shake coil is counterclockwise; “NA” indicates that the anti-shake coil is not energized.

[0102] Table 1

[0103] First anti-shake coil Second anti-shake coil Third anti-shake coil Fourth anti-shake coil +X Pan + + NA NA -X Pan - - NA NA +Y Pan NA NA + + -Y Pan NA NA - - +Z-axis rotation + - - + -Z-axis rotation - + + -

[0104] It can be seen from Table 1 that when the current direction in the first anti-shake coil 22 and the fourth anti-shake coil 25 is Figure 4 In the clockwise direction shown in the figure, the current direction in the second anti-shake coil 23 and the third anti-shake coil 24 is Figure 4 When the direction is counterclockwise, it can produce Figure 4 When the current direction of the first anti-shake coil 22 and the fourth anti-shake coil 25 is Figure 4 In the counterclockwise direction shown in the figure, the current direction in the second anti-shake coil 23 and the third anti-shake coil 24 is Figure 4 When the direction is clockwise, it can produce Figure 4 Driving force for clockwise rotation in the orientation shown.

[0105] In some optional embodiments, such as Figure 5 As shown, the secondary magnet 13 contacts the adjacent first main magnet 11, so that within a limited space, the secondary magnet 13 and the first main magnet 11 can both be larger in size, or, on the basis of fixed size, the combined space occupied by the two can be smaller. For example, the secondary magnet 13 and the adjacent first main magnet 11 can be fixedly connected or tightly abutted, which is not limited in this embodiment. When the secondary magnet 13 is fixedly connected to the first main magnet 11, the integrity of the magnet assembly 1 can be improved.

[0106] Similarly, the secondary magnet 13 contacts the adjacent second main magnet 12, so that within a limited space, the secondary magnet 13 and the second main magnet 12 can each be larger, or, while their sizes are fixed, the combined space occupied by the secondary magnet 13 and the second main magnet 12 can be smaller. For example, the secondary magnet 13 and the adjacent second main magnet 12 can be fixedly connected or tightly abutted, although this embodiment does not limit this. When the secondary magnet 13 and the second main magnet 12 are fixedly connected, the integrity of the magnet assembly 1 can be improved.

[0107] In some optional embodiments, such as Figure 1 and Figure 4 As shown, the magnet assembly 1 is annular, and the outer contour of the magnet assembly 1 is polygonal. This makes the magnet assembly 1 neat and easy to position and assemble in the electronic device. Of course, it is understandable that the outer contour of the magnet assembly 1 can also be circular, elliptical, etc., and this embodiment is not limited to this. The outer contour and inner contour of the magnet assembly 1 provided in this embodiment are both octagonal.

[0108] In one embodiment, Figure 1 and Figure 4 As shown, the magnet assembly 1 is annular, and the inner contour of the magnet assembly 1 is polygonal, so that the magnet assembly 1 is regular and easy to position and assemble in the electronic device. Of course, it is understandable that the inner contour of the magnet assembly 1 can also be circular, elliptical, etc., and this embodiment is not limited to this.

[0109] Alternatively, as Figure 6 As shown, the first main magnet 11 has a first end face 111 and a second end face 112 set at an angle, and the secondary magnet 13 adjacent to the first main magnet 11 has a third end face 131 and a first side face 342. The first end face 111 and the third end face 131 are parallel and in contact, and the second end face 112 is coplanar with the first side face 342. This, on the one hand, provides a larger contact area between the first main magnet 11 and the secondary magnet 13, improving the reliability of their connection. On the other hand, the coplanarity of the second end face 112 and the first side face 342 allows for a more uniform connection between the first main magnet 11 and the secondary magnet 13, resulting in fewer sharp corners in the magnet assembly 1. This, in turn, results in a more uniform outer contour of the entire magnet assembly 1, making it easier to assemble in electronic devices.

[0110] In some optional embodiments, please continue to see Figure 6 The second main magnet 12 has a fourth end face 121 and a fifth end face 122 arranged at an angle. The secondary magnet 13 adjacent to the second main magnet 12 has a sixth end face 133 and a first side face 342. The fourth end face 121 and the sixth end face 133 are parallel and in contact with each other, and the fifth end face 122 is coplanar with the first side face 342. This, on the one hand, provides a larger contact area between the second main magnet 12 and the secondary magnet 13, improving the reliability of the connection between them. On the other hand, the coplanarity of the fifth end face 122 and the first side face 342 allows for a more uniform connection between the second main magnet 12 and the secondary magnet 13, resulting in fewer sharp corners in the magnet assembly 1. This, in turn, results in a neater profile for the entire magnet assembly 1, making it easier to assemble in electronic devices.

[0111] In one embodiment, Figure 5As shown, the length of the first main magnet 11 in the first circumferential direction is greater than the length of the auxiliary magnet 13 in the first circumferential direction. In this way, the first main magnet 11 is larger to generate sufficient magnetic lines of force.

[0112] Alternatively, as Figure 5 As shown, the length of the second main magnet 12 in the circumferential direction of the Halbach array is greater than the length of the auxiliary magnet 13 in the circumferential direction of the Halbach array. This configuration makes the second main magnet 12 larger so as to generate sufficient magnetic lines of force.

[0113] For example, please see Figure 5 The length of the first main magnet 11 in the first ring direction is equal to the length of the second main magnet 12 in the first ring direction. This arrangement facilitates mutual induction between the first main magnet 11 and the second main magnet 12.

[0114] This embodiment also provides a camera module that has high reliability and high imaging quality. The camera module in this embodiment can be used in electronic devices to take photos or videos.

[0115] For example, Figures 7 to 14 As shown, the camera module includes a lens 100 and the above-mentioned magnetic drive device. The lens 100 is connected to the magnet assembly 1 or the coil assembly 2. It should be noted that the connection between the lens 100 and the magnet assembly 1 or the coil assembly 2 can be a fixed connection or a detachable connection, which is not limited in this embodiment.

[0116] When the coil assembly 2 is energized, it interacts with the magnet assembly 1, and the coil assembly 2 and the magnet assembly 1 move relative to each other, driving the lens 100 to move in the anti-shake direction, thereby achieving anti-shake of the lens 100 and improving the imaging quality of the camera module. It should be noted that the anti-shake direction can be the opposite direction of the camera module or the anti-shake direction of the lens 100. In addition, the anti-shake direction is a direction perpendicular to the axis of the lens 100.

[0117] The camera module provided in this embodiment can achieve anti-shake of the lens 100 by providing a magnetic drive device, and the magnetic drive device is a single-sided magnetic field enhancement structure. When the electronic device is provided with two groups of camera modules, the two groups of camera modules can be located on the weak magnetic field side of each other, thereby reducing the mutual interference between the two camera modules, thereby reducing the impact of magnetic field interference on imaging quality, and ensuring imaging quality.

[0118] In one embodiment, Figure 8As shown, the camera module also includes a housing 200 and a lens holder 300 suspended in the housing 200. It should be noted that the lens holder 300 being suspended in the housing 200 means that the lens holder 300 is not in direct contact with the inner wall of the housing 200, and the lens holder 300 can move relative to the housing 200. Among them, the lens 100 is mounted on the lens holder 300, and at least part of the lens 100 extends from the housing 200, that is, a shell wall of the housing 200 is provided with a lens hole 2101, and the lens 100 extends from the housing 200 after passing through the lens hole 2101, so that the housing 200 does not block the wide angle of the lens 100. In this embodiment, the magnetic drive device is provided in the housing 200, and the magnet assembly 1 is provided in the lens holder 300, and the coil assembly 2 is connected to the housing 200. Since the housing 200 is usually fixedly installed in the electronic device, when the coil assembly 2 is energized, the magnet assembly 1 and the lens holder 300 move relative to the housing 200, thereby driving the lens 100 to move relative to the housing 200, thereby achieving the anti-shake purpose of the lens 100.

[0119] For example, Figure 8 As shown, the housing 200 includes a bottom shell 220 and an upper shell 230 . The bottom shell 220 is fixedly connected to the upper shell 230 to form an accommodating space. The lens 100 extends from a wall of the upper shell 230 .

[0120] Optionally, the magnet assembly 1 can be fixedly connected to the lens holder 300 by bonding, clamping, etc. The coil assembly 2 can also be directly bonded or indirectly connected to the inner wall of the housing 200 through other structures.

[0121] For example, this embodiment provides a lens holder 300, such as Figure 9 and Figure 10 As shown, the lens holder 300 includes a holder body 310 and a plurality of limiting structures 320 disposed on one side of the holder body 310. The plurality of limiting structures 320 are spaced apart along a first circumferential direction, wherein the first circumferential direction is the same as the circumferential direction of the holder body 310. The plurality of limiting structures 320 cooperate with the holder body 310 to form a limiting space for mounting the magnet assembly 1. At least a portion of the magnet assembly 1 is located in the limiting space and connected to the limiting structures 320, thereby securing the magnet assembly 1 to the lens holder 300.

[0122] By setting up multiple limiting structures 320, the consumables of the lens bracket 300 can be reduced while ensuring the fixing of the magnet assembly 1, thereby reducing the cost of the lens bracket 300, and the weight of the lens bracket 300 can be lighter, which is conducive to the lightweighting of the lens bracket 300 and the camera module.

[0123] For example, Figure 10As shown, the limiting structure 320 is a bump provided on the bracket body 310, and the magnet assembly 1 can be bonded to the bracket body 310 and the bump by colloid. It should be noted that the height of the limiting structure 320 can be greater than, less than, or equal to the thickness of the magnet assembly 1, and this embodiment does not limit this.

[0124] In some optional embodiments, the lens holder 300 is an integrally formed one-piece structure to improve the integrity of the lens holder 300 and facilitate assembly of the lens holder 300 .

[0125] For ease of description, in this embodiment, the length direction of the housing 200 can be defined as the second direction Y, the width direction of the housing 200 can be defined as the third direction X, and the thickness direction of the housing 200 can be defined as the first direction Z. That is, any two of the first direction Z, the second direction Y, and the third direction X are mutually perpendicular. The length and width of the housing 200 can be the same, in which case the housing 200 is square. Typically, the length of the housing 200 is greater than its width. In this embodiment, the lens aperture 2101 is located on a wall of the housing 200 in the thickness direction.

[0126] Alternatively, see Figure 9 and Figure 10 The coil assembly 2 is connected to the first shell wall 210 of the shell 200 (eg Figure 8 As shown), the surface of the limiting structure 320 facing the first shell wall 210 is provided with a first groove 321, as shown Figure 12 As shown, the camera module further includes a first rolling element 400 rotatably disposed in the first groove 321 and in contact with the first shell wall 210 .

[0127] By rotatably positioning the first rolling element 400 between the limiting structure 320 and the first housing wall 210, when the lens 100 moves relative to the first housing wall 210 in a direction perpendicular to the first direction Z, the first rolling element 400 rotates within the first groove 321. This, while limiting the distance between the limiting structure 320 and the first housing wall 210 in the first direction Z, creates rolling friction between the lens holder 300 and the housing 200. This reduces resistance to movement of the lens holder 300, lowering the required driving force and reducing energy consumption of the camera module. Furthermore, the provision of the first rolling element 400 limits the minimum distance between the coil assembly 2 and the magnet assembly 1, preventing the two from abutting against each other and preventing the lens holder 300 from moving, thereby enhancing reliability.

[0128] Optionally, a first rolling element 400 may be provided between each limiting structure 320 and the first shell wall 210 , or a first rolling element 400 may be provided between a portion of the limiting structures 320 and the first shell wall 210 , which is not limited in this embodiment.

[0129] For example, the first rolling element 400 includes but is not limited to a ball or the like. Figure 9 As shown, the first groove 321 is a triangular pyramid groove to prevent the first rolling element 400 from rolling out of the first groove 321. In addition, the triangular pyramid groove occupies a small space and can be set on a smaller size limiting structure 320.

[0130] In some optional embodiments, a retaining groove 330 is provided on the surface of the lens holder 300 facing the first shell wall 210, and at least a portion of the magnet assembly 1 is positioned in the retaining groove 330. By providing the retaining groove 330, the lens holder 300 can be more accurately positioned, thereby facilitating the assembly of the magnet assembly 1 on the lens holder 300. Furthermore, by providing the retaining groove 330, the magnets in the magnet assembly 1 that are not in direct contact with the retaining structure 320 (the first main magnet 11, the secondary magnet 13, or the second main magnet 12) can be retained by the retaining groove 330 to prevent the magnets from moving.

[0131] Alternatively, as Figure 10 As shown, the limiting groove 330 is a shallow groove provided on the bracket body 310 of the lens bracket 300 , and a portion of the magnet assembly 1 is located in the limiting groove 330 .

[0132] In some optional embodiments, please continue to see Figure 10 The lens holder 300 can be provided with both a limiting structure 320 and a limiting groove 330. Of course, it is understandable that the lens holder 300 can also be provided with only the limiting structure 320, or the lens holder 300 can also be provided with only the limiting groove 330.

[0133] In order to improve the fixing effect of the lens 100, for example, Figure 10 As shown, the lens holder 300 is provided with a protrusion 340. The protrusion 340 extends toward the first housing wall 210. The protrusion 340 is provided with a mounting hole 341, into which the lens 100 is mounted. The provision of the protrusion 340 increases the connection area between the lens holder 300 and the lens 100, reduces the risk of the lens 100 tilting, and improves the connection strength between the lens 100 and the lens holder 300. In this embodiment, the protrusion 340 is provided on the holder body 310.

[0134] Alternatively, as Figure 11As shown, the magnet assembly 1 is sleeved on the outer periphery of the protrusion 340, and the surface of the protrusion 340 facing the magnet assembly 1 is an inclined surface. The magnet assembly 1 is arranged on the outer periphery of the protrusion 340, so that the protrusion 340 can limit the magnet assembly 1 while fixing the lens 100, enriching the function of the protrusion 340. By providing the inclined surface, it is convenient to guide the magnet assembly 1 when assembling the magnet assembly 1 on the lens holder 300, thereby facilitating the installation of the magnet assembly 1. It should be noted that the inclination direction of the inclined surface is that the end of the inclined surface close to the first shell wall 210 is inclined toward the lens 100.

[0135] Alternatively, as Figure 10 As shown, the protrusion 340 includes a first side surface 342 disposed opposite the first main magnet 11, a second side surface 343 disposed opposite the second main magnet 12, and a third side surface 344 disposed opposite the secondary magnet 13. The first side surface 342 is a flat surface to better match the shape of the first main magnet 11 and guide the first main magnet 11 during assembly. The second side surface 343 is a flat surface to better match the shape of the second main magnet 12 and guide the second main magnet 12 during assembly. The third side surface 344 is a flat surface to better match the shape of the secondary magnet 13 and guide the secondary magnet 13 during assembly.

[0136] The camera module in this embodiment also has the function of focus adjustment. For example, Figure 11 As shown, the camera module also includes a focus mechanism 500. The focus mechanism 500 is suspended within the housing 200. Specifically, the focus mechanism 500 is suspended within the housing 200, which means that the focus mechanism 500 does not directly contact the inner wall of the housing 200. The focus mechanism 500 is used to drive the lens 100 to move in a focus direction to adjust the focal length between the lens 100 and the object. The focus direction is the same as the axial direction of the lens 100, that is, the focus direction is the first direction Z.

[0137] Alternatively, see Figure 11 The focusing mechanism 500 includes a focusing magnet 510, a focusing coil 520 and a focusing connector 530. Among them, one of the focusing magnet 510 and the focusing coil 520 is connected to the housing 200, and the other is connected to the focusing connector 530. The focusing connector 530 is connected to the lens holder 300. For example, the focusing connector 530 is fixedly connected to the lens holder 300. The focusing magnet 510 and the focusing coil 520 cooperate with each other to drive the focusing connector 530 to move relative to the housing 200 in the focusing direction, thereby driving the lens 100 to move relative to the housing 200 in the focusing direction to achieve focal length adjustment. After being energized, the focusing coil 520 interacts with the focusing magnet 510 to generate a driving force in the focusing direction.

[0138] By providing a focusing mechanism 500, the lens 100 can be driven to move in the first direction Z. By providing a magnetic drive device, the lens 100 can be moved in the second direction Y and the third direction X. It can also be rotated around the axis in the first direction Z. This allows the lens 100 to have multiple degrees of freedom, thereby making the lens 100 more flexible and improving the quality of imaging.

[0139] In some optional embodiments, such as Figure 12 As shown, the focus connector 530 includes a first connecting portion 531 and a second connecting portion 532 connected vertically. The first connecting portion 531 is located on the side of the lens holder 300 facing away from the first shell wall 210 of the housing 200 and is connected to the lens holder 300. The focus coil 520 or the focus magnet 510 is connected to the second connecting portion 532. In this embodiment, the second connecting portion 532 is arranged opposite to the side wall of the housing 200, that is, the focus coil 520 and the focus magnet 510 are located on one side of the lens 100, making the distribution of components within the housing 200 more reasonable, making full use of the internal space of the housing 200, and facilitating the thinning and miniaturization of the camera module.

[0140] Optionally, the first connecting portion 531 and the second connecting portion 532 may both be plates, which is not limited in this embodiment. In this embodiment, the focus magnet 510 is fixedly connected to the second connecting portion 532 , and the focus coil 520 is fixedly connected to the side wall of the housing 200 .

[0141] Optionally, an inner support member 700 is provided in the housing 200, such as Figure 13 As shown, the inner support member 700 includes a support plate 710 and a first column 720 and a second column 730 disposed on the support plate 710. The support plate 710 is fixedly connected to the first shell wall 210, and the first column 720 and the second column 730 are disposed on the side of the support plate 710 facing away from the first shell wall 210 and extend along the thickness direction of the shell 200. The coil assembly 2 is fixedly connected to the support plate 710, thereby being indirectly fixedly connected to the shell 200 through the support plate 710. The support plate 710 is provided with a hole (not shown) for the lens 100 to pass through, which is coaxially arranged with the lens hole 2101.

[0142] In order to reduce the friction force when the focus connection member 530 moves relative to the housing 200, in this embodiment, Figure 12As shown, a second rolling member 800 is disposed between the second connecting portion 532 of the focus connector 530 and the first column 720. Specifically, the second connecting portion 532 is provided with a first V-shaped groove 5321 facing the first column 720, and the first column 720 is provided with a second V-shaped groove 721 facing the second connecting portion 532. The second rolling member 800 is rotatably disposed between the first V-shaped groove 5321 and the second V-shaped groove 721, so as to be limited by the first V-shaped groove 5321 and the second V-shaped groove 721. The provision of the second rolling member 800 can reduce friction when the focus connector 530 moves relative to the housing 200, thereby achieving the purpose of reducing energy consumption of the camera module.

[0143] In some optional embodiments, the camera module further includes a circuit board assembly 600 connected to the housing 200 , and each anti-shake coil 21 and focus coil 520 of the coil assembly 2 are electrically connected to the circuit board assembly 600 .

[0144] For example, Figure 8 As shown, the circuit board assembly 600 includes an electrically connected first circuit board 610 and a second circuit board 620. The first circuit board 610 is arranged between the lens holder 300 and the first shell wall 210 of the housing 200. Specifically, the first circuit board 610 is arranged between the support plate 710 and the lens holder 300. In addition, the first circuit board 610 is provided with a through hole 611, and the lens 100 is inserted into the through hole 611. The coil assembly 2 is electrically connected to the first circuit board 610. Specifically, each anti-shake coil 21 of the coil assembly 2 is electrically connected to the first circuit board 610. The second circuit board 620 is bent relative to the first circuit board 610, and the focus coil 520 is electrically connected to the second circuit board 620. By setting up the first circuit board 610 and the second circuit board 620, electric energy can be provided to the focusing coil 520 and the anti-shake coil 21, and the position of the first circuit board 610 and the second circuit board 620 will not affect the movement of the lens holder 300 and the focusing connector 530, and has high reliability.

[0145] In some optional embodiments, multiple anti-shake coils 21 are fixedly connected to the first circuit board 610, and the focus coil 520 is also fixedly connected to the second circuit board 620, so that the first circuit board 610, the second circuit board 620, the focus coil 520 and the anti-shake coil 21 are connected into an integrated structure, so that the number of components in the camera module can be reduced, which facilitates the assembly and disassembly of the camera module.

[0146] This embodiment further provides an electronic device, which includes the above-mentioned magnetic drive device; or, the electronic device includes the above-mentioned camera module.

[0147] When the electronic device provided by this embodiment includes a magnetic drive device, mutual interference between the magnetic drive devices can be reduced, and the reliability is high. When the electronic device includes a camera module, the imaging effect is better.

[0148] It should be noted that, when the camera module includes a housing 200 , the housing 200 may be a part of a device housing of the electronic device, or the housing 200 may be fixedly connected to the device housing of the electronic device.

[0149] In this embodiment, the electronic device may include a mobile phone, a tablet computer (tablet personal computer), a laptop computer (laptop), a personal digital assistant (PDA), a camera, a personal computer, a laptop computer, or other device with a camera module. The embodiment of the present application does not impose any particular limitation on the specific form of the above-mentioned electronic device.

[0150] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A magnetic drive device, characterized in that: include: A magnet assembly (1) comprises a plurality of first main magnets (11), a plurality of second main magnets (12) and a plurality of auxiliary magnets (13), wherein the polarities of the first main magnets (11) and the second main magnets (12) are opposite, and the plurality of first main magnets (11) and the plurality of second main magnets (12) are alternately arranged along a first circumferential direction, and the auxiliary magnet (13) is arranged between any adjacent first main magnets (11) and second main magnets (12) in the first circumferential direction, and the first main magnet (11), the second main magnet (12) and the auxiliary magnet (13) cooperate with each other to form a Halbach array; The coil assembly (2) is arranged on the magnetic field enhancement side of the Halbach array and is spaced apart from the magnet assembly (1). When the coil assembly (2) is energized, it can interact with the magnet assembly (1), and the coil assembly (2) and the magnet assembly (1) can move relative to each other.

2. The magnetic drive device according to claim 1, characterized in that The coil assembly (2) includes a plurality of anti-shake coils (21), and the plurality of anti-shake coils (21) are arranged at intervals along the first circumferential direction; each of the anti-shake coils (21) and the magnet assembly (1) at least partially overlap in a first direction (Z); wherein the first direction (Z) is a thickness direction of the magnet assembly (1).

3. The magnetic drive device according to claim 2, characterized in that The anti-shake coils (21) and the secondary magnets (13) are the same in number and correspond one to one; the projection of the anti-shake coils (21) along the first direction (Z) on the characteristic plane is a first projection, and the projection of the first main magnet (11) adjacent to the secondary magnet (13) corresponding to the anti-shake coil (21) along the first direction (Z) on the characteristic plane is a second projection, and the first projection and the second projection at least partially overlap; wherein the characteristic plane is a plane perpendicular to the first direction (Z).

4. The magnetic drive device according to claim 2, characterized in that The anti-shake coils (21) and the secondary magnets (13) are the same in number and correspond one to one; the projection of the anti-shake coils (21) along the first direction (Z) on the characteristic plane is a first projection, and the projection of the second main magnet (12) adjacent to the secondary magnet (13) corresponding to the anti-shake coil (21) along the first direction (Z) on the characteristic plane is a third projection, and the first projection and the third projection at least partially overlap; wherein the characteristic plane is a plane perpendicular to the first direction (Z).

5. The magnetic drive device according to claim 2, characterized in that: The anti-shake coils (21) and the secondary magnets (13) are the same in number and correspond one to one; the projection of the anti-shake coils (21) along the first direction (Z) on the characteristic plane is a first projection, and the projection of the secondary magnets (13) corresponding to the anti-shake coils (21) along the first direction (Z) on the characteristic plane is a fourth projection, and the first projection and the fourth projection at least partially overlap; wherein the characteristic plane is a plane perpendicular to the first direction (Z).

6. The magnetic drive device according to claim 2, characterized in that: The surface of the anti-shake coil (21) facing the center of the coil assembly (2) is a concave avoidance curved surface (211).

7. The magnetic drive device according to any one of claims 1 to 5, characterized in that: The coil assembly (2) comprises a first anti-shake coil (22) and a second anti-shake coil (23) arranged relative to each other in a second direction (Y), and a third anti-shake coil (24) and a fourth anti-shake coil (25) arranged relative to each other in a third direction (X); When the first anti-shake coil (22) and the second anti-shake coil (23) are energized, and the third anti-shake coil (24) and the fourth anti-shake coil (25) are not energized, the coil assembly (2) and the magnet assembly (1) move relative to each other in the third direction (X); when the third anti-shake coil (24) and the fourth anti-shake coil (25) are energized, and the first anti-shake coil (22) and the second anti-shake coil (23) are not energized, the coil assembly (2) and the magnet assembly (1) move relative to each other in the second direction (Y).

8. The magnetic drive device according to any one of claims 1 to 5, characterized in that: The coil assembly (2) includes a plurality of anti-shake coils (21). When the plurality of anti-shake coils (21) are energized simultaneously, the coil assembly (2) and the magnet assembly (1) rotate relative to each other.

9. The magnetic drive device according to any one of claims 1 to 5, characterized in that: The auxiliary magnet (13) is in contact with the adjacent first main magnet (11); and / or the auxiliary magnet (13) is in contact with the adjacent second main magnet (12).

10. The magnetic drive device according to any one of claims 1 to 5, characterized in that: The first main magnet (11) has a first end face (111) and a second end face (112) arranged at an angle, the auxiliary magnet (13) adjacent to the first main magnet (11) has a third end face (131) and a first side face (342), the first end face (111) is parallel to and in contact with the third end face (131), and the second end face (112) is coplanar with the first side face (342); and / or, The second main magnet (12) has a fourth end face (121) and a fifth end face (122) arranged at an angle, the auxiliary magnet (13) adjacent to the second main magnet (12) has a sixth end face (133) and a first side face (342), the fourth end face (121) is parallel to and in contact with the sixth end face (133), and the fifth end face (122) is coplanar with the first side face (342).

11. A camera module, characterized in that: The camera module comprises a magnetic drive device as described in any one of claims 1 to 10, wherein the camera module further comprises a lens (100), wherein the lens (100) is connected to the magnet assembly (1) or the coil assembly (2), and the coil assembly (2) can interact with the magnet assembly (1) when energized, and the coil assembly (2) and the magnet assembly (1) can move relative to each other to drive the lens (100) to move in the anti-shake direction.

12. The camera module according to claim 11, wherein: The camera module further comprises a housing (200) and a lens holder (300) suspended in the housing (200); the lens (100) is mounted on the lens holder (300), and at least a portion of the lens (100) extends from the housing (200); the magnetic drive device is disposed in the housing (200), the magnet assembly (1) is disposed on the lens holder (300), and the coil assembly (2) is connected to the housing (200).

13. The camera module according to claim 12, wherein: The lens holder (300) comprises a holder body (310) and a plurality of limiting structures (320) arranged on one side of the holder body (310), wherein the plurality of limiting structures (320) are arranged at intervals along the first circumferential direction to cooperate with the holder body (310) to form a limiting space, and at least a portion of the magnet assembly (1) is located in the limiting space and is connected to the limiting structure (320).

14. The camera module according to claim 13, wherein: The coil assembly (2) is connected to the first shell wall (210) of the housing (200); the limiting structure (320) is provided with a first groove (321) on a surface facing the first shell wall (210); and the camera module further comprises a first rolling element (400) rotatably disposed in the first groove (321) and in contact with the first shell wall (210).

15. The camera module according to claim 12, wherein: The lens holder (300) is provided with a limiting groove (330), and at least a portion of the magnet assembly (1) is placed in the limiting groove (330).

16. The camera module according to claim 12, wherein: The lens holder (300) is provided with a protrusion (340), the protrusion (340) is provided with a mounting hole (341), and the lens (100) is mounted in the mounting hole (341); the magnet assembly (1) is sleeved on the outer periphery of the protrusion (340), and the surface of the protrusion (340) facing the magnet assembly (1) is an inclined surface.

17. The camera module according to claim 12, wherein: The camera module further comprises a focus mechanism (500), which is suspended in the housing (200) and comprises a focus magnet (510), a focus coil (520) and a focus connector (530), wherein one of the focus magnet (510) and the focus coil (520) is connected to the housing (200), and the other is connected to the focus connector (530), and the focus connector (530) is connected to the lens holder (300); the focus magnet (510) and the focus coil (520) cooperate with each other to drive the focus connector (530) to move relative to the housing (200) in a focus direction.

18. The camera module according to claim 17, wherein: The focus connecting member (530) comprises a first connecting portion (531) and a second connecting portion (532) connected vertically, wherein the first connecting portion (531) is arranged on a side of the lens holder (300) facing away from the first shell wall (210) of the housing (200) and is connected to the lens holder (300), and the focus coil (520) or the focus magnet (510) is connected to the second connecting portion (532).

19. The camera module according to claim 18, wherein: The camera module further comprises a circuit board assembly (600) connected to the housing (200), the circuit board assembly (600) comprising a first circuit board (610) and a second circuit board (620), the first circuit board (610) being arranged between the lens holder (300) and the first housing wall (210), and the first circuit board (610) being provided with a through hole (611), the lens (100) being passed through the through hole (611), the coil assembly (2) being electrically connected to the first circuit board (610), the second circuit board (620) being bent relative to the first circuit board (610), and the focusing coil (520) being electrically connected to the second circuit board (620).

20. An electronic device, characterized in that The electronic device includes the magnetic drive device as described in any one of claims 1-10; or, the electronic device includes the camera module as described in any one of claims 11-19.

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