Voice coil motors, camera modules, and electronic devices

Abstract

This application provides a voice coil motor, a camera module, and an electronic device. The voice coil motor includes a housing, a carrier, and a drive assembly comprising a stator and a mover. The drive assembly drives the carrier to move a lens. In one embodiment, the mover of the drive assembly is suspended by a magnetic levitation assembly, which includes a fixed magnet assembly and a moving magnet assembly connected to the mover. A magnetic force perpendicular to the optical axis is generated between the moving magnet assembly and the fixed magnet assembly. This magnetic force is balanced within a plane perpendicular to the optical axis to maintain the gap between the moving magnet assembly and the fixed magnet assembly. In another embodiment, the stator of the drive assembly includes a first permanent magnet, and the mover includes a second permanent magnet, a soft magnetic component, and a winding. The balance between the repulsive force between the first and second permanent magnets and the attractive force between the soft magnetic component and the first permanent magnet suspends the mover. Current flowing through the winding changes the distance between the stator and the mover, thus enabling the mover to move. The above technical solutions can reduce the power consumption of the voice coil motor.

Description

Technical Field

[0001] This application relates to the field of electronic device technology, and more specifically, to a voice coil motor, a camera module, and an electronic device. Background Technology

[0002] With the continuous development of electronic device technology, the camera function has become an important feature of electronic devices (such as mobile phones and tablets) and a major indicator for evaluating their performance. To improve image quality and enhance the user's shooting experience, cameras on electronic devices often feature autofocus and / or optical image stabilization.

[0003] A voice coil motor is a device that converts electrical energy into mechanical energy. It has advantages such as simple structure, small size, and fast response speed, and is therefore commonly used in cameras to achieve autofocus and / or optical image stabilization. However, existing voice coil motors (such as spring-type voice coil motors, sliding shaft-type voice coil motors, and ball-type voice coil motors) generally suffer from high power consumption. For example, in spring-type voice coil motors, the elastic deformation of the spring during the movement of the mover increases the motor's power consumption. Similarly, in sliding shaft-type and ball-type voice coil motors, the friction generated during the movement of the mover increases the motor's power consumption. Summary of the Invention

[0004] This application provides a voice coil motor, a camera module, and an electronic device that can reduce the power consumption of the voice coil motor.

[0005] In a first aspect, a voice coil motor is provided, comprising: a housing having a receiving space; a carrier housed in the receiving space, the carrier being for connection to at least a portion of a lens component; a drive assembly including a stator and a mover, the stator being connected to the housing and the mover being connected to the carrier, the mover being movable relative to the stator along an optical axis; and a magnetic levitation assembly including a moving magnetic assembly and a fixed magnetic assembly, the fixed magnetic assembly being connected to the housing and the moving magnetic assembly being correspondingly disposed with respect to the fixed magnetic assembly, the moving magnetic assembly being connected to the mover or the carrier, the moving magnetic assembly and the fixed magnetic assembly generating a magnetic force perpendicular to the optical axis, the magnetic forces being mutually balanced in a plane perpendicular to the optical axis to maintain a gap between the moving magnetic assembly and the fixed magnetic assembly.

[0006] In this embodiment, the mover is suspended in the receiving space formed by the housing via a magnetic levitation component. When the mover drives the carrier to move relative to the stator, the mover can move without mechanical friction, greatly reducing the power consumption of the voice coil motor. Furthermore, since the mover moves without friction, the noise of the voice coil motor and the wear of the mover in the motor can be reduced, thus extending the service life of the voice coil motor. When the voice coil motor is used in a camera module, the impact of the voice coil motor's heat on surrounding components can be reduced. When a camera module including a voice coil motor is used in an electronic device, the battery life of the electronic device can be extended.

[0007] In conjunction with the first aspect, in one possible implementation, the magnetic force includes a magnetic force in a first direction and a magnetic force in a second direction. The magnetic force in the first direction is used to maintain the gap between the moving magnetic component and the fixed magnetic component in the first direction, and the magnetic force in the second direction is used to maintain the gap between the moving magnetic component and the fixed magnetic component in the second direction. The first direction and the second direction are both perpendicular to the optical axis direction, and the first direction and the second direction are perpendicular to each other.

[0008] The magnetic force generated between the moving magnetic component and the fixed magnetic component ensures that there is a certain gap between them in the first and second mutually perpendicular directions. This allows the moving part and the carrier to be more stably suspended in the shell, thereby improving the accuracy of motion control of the moving part in the optical axis direction.

[0009] In conjunction with the first aspect, in one possible implementation, the fixed magnet component includes at least one permanent magnet group, the permanent magnet group includes two permanent magnet elements, and the moving magnet component includes moving magnetic blocks arranged in a one-to-one correspondence with the permanent magnet elements. The two permanent magnet elements in the permanent magnet group are respectively disposed at both ends of the two moving magnetic blocks corresponding to them in the first direction; wherein, in the permanent magnet group, the magnetic force of either of the two permanent magnet elements and the corresponding moving magnetic block in the first direction is a repulsive force, or the magnetic force of either of the two permanent magnet elements and the corresponding moving magnetic block in the first direction is an attractive force.

[0010] Thus, the two moving magnetic blocks corresponding to the two permanent magnets in the permanent magnet assembly are subjected to magnetic forces in opposite directions in the first direction, which enables the two moving magnetic blocks to maintain a gap with their respective permanent magnets, thereby achieving levitation in the first direction.

[0011] In conjunction with the first aspect, in one possible implementation, the two moving magnets are respectively connected to the two ends of the mover in the first direction.

[0012] On the one hand, it facilitates the connection between the mover and the carrier, and on the other hand, it helps to balance the forces on the mover, enabling the mover to levitate in the first direction.

[0013] In conjunction with the first aspect, in one possible implementation, the fixed magnet assembly includes two permanent magnet groups, which are symmetrically arranged on both sides of the carrier in the second direction.

[0014] The two permanent magnet groups are symmetrically arranged in the second direction, which enables the moving part of the voice coil motor to maintain a gap between itself and the fixed part in the second direction, thereby achieving levitation in the second direction.

[0015] In conjunction with the first aspect, in one possible implementation, the permanent magnet component includes a first permanent magnet portion, a second permanent magnet portion, and a third permanent magnet portion. The first permanent magnet portion and the second permanent magnet portion are disposed opposite each other in the second direction, and the third permanent magnet portion is located between the first permanent magnet portion and the second permanent magnet portion. The first permanent magnet portion, the second permanent magnet portion, and the third permanent magnet portion form a U-shaped structure. At least a portion of the moving magnetic block is located within the U-shaped structure. The moving magnetic block includes a fourth permanent magnet portion and a fifth permanent magnet portion. The fifth permanent magnet portion is located between the fourth permanent magnet portion and the moving element in the first direction. The fourth permanent magnet portion and the third permanent magnet portion are disposed opposite each other in the first direction, and the magnetic pole direction of the third permanent magnet portion is... The magnetic poles of the fourth permanent magnet are all distributed along the first direction, so that the fourth permanent magnet and the third permanent magnet repel or attract each other in the first direction; the fifth permanent magnet is located between the first permanent magnet and the second permanent magnet in the second direction, and the magnetic poles of the first permanent magnet, the second permanent magnet, and the fifth permanent magnet are all distributed along the second direction; the magnetic poles of the first permanent magnet are the same as those of the second permanent magnet and the magnetic poles of the fifth permanent magnet are opposite to those of the first permanent magnet, or the magnetic poles of the first permanent magnet, the second permanent magnet, and the fifth permanent magnet are all the same.

[0016] The moving part is levitated by the magnetic force of the interaction between the permanent magnet and the moving magnet. The first permanent magnet part and the second permanent magnet part restrict the position of the moving part in the second direction, so as to achieve the purpose of levitation of the moving part in an extremely narrow space.

[0017] In conjunction with the first aspect, in one possible implementation, the first permanent magnet portion and the second permanent magnet portion are of the same size, and the projected overlap area of ​​the first permanent magnet portion and the fifth permanent magnet portion in the second direction is equal to the projected overlap area of ​​the second permanent magnet portion and the fifth permanent magnet portion in the second direction.

[0018] The first permanent magnet section and the second permanent magnet section are the same size, which can establish a symmetrical magnetic field environment between the first permanent magnet section and the second permanent magnet section, so that the mover is in the middle position between the first permanent magnet section and the second permanent magnet section in the second direction.

[0019] In conjunction with the first aspect, in one possible implementation, the permanent magnet component includes a second permanent magnet portion and a third permanent magnet portion, the second permanent magnet portion and the third permanent magnet portion being arranged at an angle to form an L-shaped structure; the moving magnetic block includes a fourth permanent magnet portion and a fifth permanent magnet portion arranged along the first direction, the fifth permanent magnet portion being connected to the mover; the fourth permanent magnet portion and the third permanent magnet portion are arranged opposite to each other in the first direction, the magnetic pole directions of the third permanent magnet portion and the fourth permanent magnet portion are both distributed along the first direction, so that the fourth permanent magnet portion and the third permanent magnet portion repel or attract each other in the first direction; the fifth permanent magnet portion and the second permanent magnet portion are arranged opposite to each other in the second direction, the magnetic pole directions of the second permanent magnet portion and the fifth permanent magnet portion are both distributed along the second direction, so that the second permanent magnet portion and the fifth permanent magnet portion repel or attract each other in the second direction.

[0020] By combining two permanent magnet groups, the mover can be suspended in the second direction, saving space.

[0021] In conjunction with the first aspect, in one possible implementation, the permanent magnet component includes a second permanent magnet portion and a third permanent magnet portion, the second and third permanent magnet portions being angled together and forming an L-shaped structure; the moving magnetic block includes a fourth, a fifth, and a first permanent magnet portion arranged along the first direction; the fourth and third permanent magnet portions are arranged opposite each other in the first direction, and the magnetic pole directions of both the third and fourth permanent magnet portions are distributed along the first direction, so that the fourth and third permanent magnet portions repel or attract each other in the first direction; The fifth permanent magnet part and the second permanent magnet part are arranged opposite to each other in the second direction. The magnetic pole directions of the second permanent magnet part and the fifth permanent magnet part are both distributed along the second direction. The magnetic pole direction of the second permanent magnet part is opposite to that of the fifth permanent magnet part. The first magnetic part and the second permanent magnet part are arranged opposite to each other in the second direction. The second permanent magnet part and the first magnetic part attract each other. The first magnetic part includes a soft magnetic material, or the first magnetic part includes a permanent magnet material and the magnetic pole direction of the first magnetic part is the same as that of the second permanent magnet part.

[0022] In this embodiment, the repulsive force between the second permanent magnet and the fifth permanent magnet and the magnetic attraction between the first magnetic part and the second permanent magnet make the mover levitate at a specified height and form a unilateral magnetic levitation. This can reduce the structural size of the magnetic levitation component, which is beneficial for device miniaturization and reduces the complexity and manufacturing difficulty of the magnetic levitation component.

[0023] In conjunction with the first aspect, in one possible implementation, the moving magnetic block includes at least one fifth permanent magnet portion and at least one first magnetic portion, wherein at least one fifth permanent magnet portion and at least one first magnetic portion are alternately arranged between the fourth permanent magnet portion and the mover.

[0024] By adjusting the repulsive force between the fifth permanent magnet section and the second permanent magnet section, as well as the attractive force between the first magnetic section and the second permanent magnet section, unilateral balance can be achieved, which is beneficial for the stable suspension of the mover.

[0025] In conjunction with the first aspect, in one possible implementation, the dimension of the second permanent magnet in the first direction is larger than the dimension of the moving magnet in the first direction.

[0026] This allows for full utilization of the magnetic forces between the fifth permanent magnet section and the first magnetic section and the second permanent magnet section, respectively, avoiding waste of space or magnetic force.

[0027] In conjunction with the first aspect, in one possible implementation, the dimension of the fourth permanent magnet part in the first direction is smaller than the dimension of the fifth permanent magnet part in the first direction.

[0028] By limiting the size of the fourth permanent magnet in the first direction, the space occupied by the fourth permanent magnet can be reduced while meeting the levitation requirements, thus providing more design adjustment space for the fifth permanent magnet and the first magnetic part.

[0029] In conjunction with the first aspect, in one possible implementation, the size of the moving magnet in the optical axis direction is smaller than the size of the permanent magnet in the optical axis direction.

[0030] The permanent magnet has a large size in the optical axis direction, which can cover the stroke of the mover and ensure the levitation effect of the mover.

[0031] In conjunction with the first aspect, in one possible implementation, the fixed magnet assembly further includes a yoke that covers at least a portion of the surface of the permanent magnet facing away from the moving magnet.

[0032] By setting a magnetic yoke, the magnetic field can be concentrated and guided, thereby enhancing the magnetic field lines and reducing magnetic leakage.

[0033] In conjunction with the first aspect, in one possible implementation, the fixed magnet component includes one or more permanent magnets, and the moving magnet component includes moving magnet structures that are arranged one-to-one with the permanent magnets. A third-direction magnetic force is generated between the permanent magnet and the corresponding moving magnet structure to maintain the gap between the permanent magnet and the corresponding moving magnet structure in the third direction. The third direction is perpendicular to the optical axis and intersects the optical axis.

[0034] The magnetic force generated between the moving magnetic component and the stationary magnetic component intersects with the optical axis, which is beneficial for precisely controlling the levitation position of moving parts such as the mover.

[0035] In conjunction with the first aspect, in one possible implementation, the fixed magnet assembly includes a plurality of permanent magnets, which are circumferentially and uniformly spaced around the optical axis.

[0036] The magnetic force generated by the interaction between multiple permanent magnets and multiple moving magnet structures enables the mover to be stably suspended in a direction perpendicular to the optical axis.

[0037] In conjunction with the first aspect, in one possible implementation, the moving magnetic structure includes a sixth permanent magnet part and a second magnetic part. The sixth permanent magnet part and the permanent magnet component have a repulsive magnetic force in the third direction. The second magnetic part includes a soft magnetic material or a permanent magnet material, so that the magnetic force between the second magnetic part and the permanent magnet component in the third direction is an attractive force.

[0038] In this way, the moving magnetic structure and the corresponding permanent magnet achieve a balance of repulsive and attractive forces in the third direction, thereby suspending the moving part and the carrier and other moving components in the third direction.

[0039] In conjunction with the first aspect, in one possible implementation, the second magnetic part includes a soft magnetic material, and the moving magnetic structure further includes a first winding disposed on the third-direction side of the second magnetic part, the first winding being used to pass current to change the distance between the permanent magnet and the moving magnetic structure.

[0040] By adjusting the magnitude and / or direction of the current in the first winding, the performance of the second magnetic part (such as magnetization intensity and / or magnetization direction) can be controlled, thereby adjusting and controlling the position of the mover and the carrier in a direction perpendicular to the optical axis.

[0041] In conjunction with the first aspect, in one possible implementation, the second magnetic part includes a first body and a first protrusion extending from the first body in a third direction, the first winding being sleeved on the first protrusion.

[0042] The first protrusion located in the middle of the first winding can transmit the magnetic field, enhance the electromagnetic induction intensity, and help save power consumption.

[0043] In conjunction with the first aspect, in one possible implementation, the size of the first protrusion in the third direction is greater than or equal to the size of the first winding in the third direction; and / or the size of the first protrusion in the third direction is less than the size of the first body in the third direction.

[0044] When current is passed through the first winding, a portion of the second magnetic part can be magnetized by the electromagnetic field of the first winding, which is beneficial for flexibly adjusting the attraction between the second magnetic part and the permanent magnet.

[0045] In conjunction with the first aspect, in one possible implementation, the fixed magnet component further includes a yoke that covers at least a portion of the surface of the permanent magnet that is away from the moving magnet structure.

[0046] In conjunction with the first aspect, in one possible implementation, the mover and the stator are arranged opposite each other in a direction perpendicular to the optical axis, the mover being either a magnet or a coil, and the stator being either a magnet or a coil.

[0047] In a second aspect, a voice coil motor is provided, comprising: a housing having a receiving space; a carrier housed within the receiving space, the carrier being used to connect to at least a portion of a lens component; a drive assembly including a stator and a mover, the stator being connected to the housing, the mover being connected to the carrier, the mover and the stator being disposed opposite each other in the optical axis direction, and the mover being movable relative to the stator in the optical axis direction; wherein the stator includes a first permanent magnet, the mover includes a second permanent magnet, a magnetic element, and a second winding, the magnetic force between the second permanent magnet and the first permanent magnet in the optical axis direction being a repulsive force, the magnetic element comprising a soft magnetic material such that the magnetic force between the first permanent magnet and the magnetic element in the optical axis direction is an attractive force; the second winding is disposed on one side of the magnetic element in the optical axis direction, the second winding being used to pass current through to change the distance between the stator and the mover in the optical axis direction.

[0048] In this embodiment, the mover is suspended in the receiving space formed by the housing via a driving component. When the mover drives the carrier to move relative to the stator, the mover can move without mechanical friction, greatly reducing the power consumption of the voice coil motor. Furthermore, by adjusting the current in the second winding, the performance of the magnetic components can be controlled, thereby achieving adjustment and control of the magnetic levitation height of the mover. Converting the change in magnetic levitation height into driving force enables the voice coil motor mover to levitate in the target direction, thus achieving the automatic focusing function of the voice coil motor.

[0049] In conjunction with the second aspect, in one possible implementation, when no current is applied to the second winding, the magnetic force between the stator and the mover is used to suspend the mover in a first position within the receiving space, wherein the mover is at a first distance from the stator in the first position; when current is applied to the second winding, the magnetic force between the stator and the mover is used to suspend the mover in a second position within the receiving space, wherein the mover is at a second distance from the stator in the second position, the second distance being different from the first distance.

[0050] In conjunction with the second aspect, in one possible implementation, the distance between the mover and the stator is changed by altering the magnitude and / or direction of the current flowing through the second winding.

[0051] By adjusting the magnitude and / or direction of the current in the second winding, the magnetization state of the magnetic components can be controlled, thereby adjusting the distance between the mover and the stator and realizing the movement of the mover.

[0052] In conjunction with the second aspect, in one possible implementation, the second winding has a dimension smaller than the magnetic element in the first direction, and / or the second winding has a dimension smaller than the magnetic element in the second direction, wherein the first direction and the second direction are perpendicular to each other and both are perpendicular to the optical axis direction.

[0053] Thus, when current is passed through the second winding, the magnetic component can be locally magnetized by the electromagnetic field of the winding, which is beneficial for flexibly adjusting the attraction between the magnetic component and the first permanent magnet.

[0054] In conjunction with the second aspect, in one possible implementation, the second winding is disposed on the side of the magnetic element away from the first permanent magnet, or the second winding is disposed between the magnetic element and the first permanent magnet.

[0055] In conjunction with the second aspect, in one possible implementation, the magnetic element includes a second body and a second protrusion extending from the second body along the optical axis, the second winding being sleeved on the second protrusion.

[0056] The second protrusion located in the middle of the second winding can transmit the magnetic field, enhance the electromagnetic induction intensity, and help save power consumption.

[0057] In conjunction with the second aspect, in one possible implementation, the size of the second protrusion in the optical axis direction is greater than or equal to the size of the second winding in the optical axis direction; and / or the size of the second protrusion in the optical axis direction is smaller than the size of the second body in the optical axis direction.

[0058] The second protrusion has a smaller proportion, which allows for fine-tuning of the local magnetization state of the magnetic component, avoiding significant impact on the magnetization state of the magnetic component by the first permanent magnet component.

[0059] In conjunction with the second aspect, in one possible implementation, the stator further includes a magnetic yoke that covers at least a portion of the surface of the first permanent magnet that is away from the mover.

[0060] In conjunction with the second aspect, in one possible implementation, the voice coil motor includes a plurality of drive components, which are uniformly arranged around the periphery of the carrier in the direction of the optical axis.

[0061] Thirdly, a voice coil motor is provided, comprising: a housing having a receiving space; a carrier housed in the receiving space, the carrier being used to connect to at least a portion of a lens component; a drive assembly including a stator and a mover, the stator being connected to the housing and the mover being connected to the carrier, the mover being movable relative to the stator along a target direction perpendicular to the optical axis; and a magnetic levitation assembly including a moving magnetic assembly and a fixed magnetic assembly, the fixed magnetic assembly being connected to the housing, the moving magnetic assembly being correspondingly disposed to the fixed magnetic assembly, the moving magnetic assembly being connected to the mover, and a magnetic force perpendicular to the target direction being generated between the moving magnetic assembly and the fixed magnetic assembly, the magnetic force being used to maintain a gap between the moving magnetic assembly and the fixed magnetic assembly.

[0062] In this embodiment, the mover is suspended in the housing space formed by the magnetic levitation component. When the mover drives the carrier to move relative to the stator, the mover can move without mechanical friction, which greatly reduces the power consumption of the voice coil motor.

[0063] In conjunction with the third aspect, in one possible implementation, the magnetic force includes a magnetic force in a first direction and a magnetic force in a second direction. The magnetic force in the first direction is used to maintain the gap between the moving magnetic component and the fixed magnetic component in the first direction, and the magnetic force in the second direction is used to maintain the gap between the moving magnetic component and the fixed magnetic component in the second direction. The first direction is the optical axis direction, the second direction is tangent to the outer periphery of the carrier, and the first direction and the second direction are perpendicular to each other.

[0064] In conjunction with the third aspect, in one possible implementation, the fixed magnet assembly includes at least one permanent magnet group, the permanent magnet group includes two permanent magnet elements, and the moving magnet assembly includes moving magnet blocks arranged in a one-to-one correspondence with the permanent magnet elements. The two permanent magnet elements in the permanent magnet group are respectively disposed at both ends of the two moving magnet blocks corresponding to them in the second direction; wherein, in the permanent magnet group, the magnetic force of either of the two permanent magnet elements and the corresponding moving magnet block in the first direction is a repulsive force, or the magnetic force of either of the two permanent magnet elements and the corresponding moving magnet block in the first direction is an attractive force.

[0065] In conjunction with the third aspect, in one possible implementation, the two moving magnets are respectively connected to the two ends of the mover in the second direction.

[0066] In conjunction with the third aspect, in one possible implementation, the permanent magnet component includes a first permanent magnet portion, a second permanent magnet portion, and a third permanent magnet portion. The first and second permanent magnet portions are disposed opposite to each other in the optical axis direction, and the third permanent magnet portion is located between the first and second permanent magnet portions. The first, second, and third permanent magnet portions form a U-shaped structure. At least a portion of the moving magnetic block is located within the U-shaped structure. The moving magnetic block includes a fourth and a fifth permanent magnet portion. The fifth permanent magnet portion is located between the fourth permanent magnet portion and the moving element in the second direction. The fourth and third permanent magnet portions are disposed opposite to each other in the second direction, and the magnetic pole direction of the third permanent magnet portion is... The magnetic poles of the fourth permanent magnet are all distributed along the second direction, so that the fourth permanent magnet and the third permanent magnet repel or attract each other in the second direction; the fifth permanent magnet is located between the first permanent magnet and the second permanent magnet in the optical axis direction, and the magnetic poles of the first permanent magnet, the second permanent magnet, and the fifth permanent magnet are all distributed along the optical axis direction; the magnetic poles of the first permanent magnet are the same as those of the second permanent magnet and the magnetic poles of the fifth permanent magnet are opposite to those of the first permanent magnet, or the magnetic poles of the first permanent magnet, the second permanent magnet, and the fifth permanent magnet are all the same.

[0067] In conjunction with the third aspect, in one possible implementation, the first permanent magnet portion and the second permanent magnet portion are the same size, and the projected overlap area of ​​the first permanent magnet portion and the fifth permanent magnet portion in the optical axis direction is equal to the projected overlap area of ​​the second permanent magnet portion and the fifth permanent magnet portion in the second direction.

[0068] In conjunction with the third aspect, in one possible implementation, the permanent magnet component includes a second permanent magnet portion and a third permanent magnet portion, the second and third permanent magnet portions being angled together and forming an L-shaped structure; the moving magnetic block includes a fourth, a fifth, and a first permanent magnet portion arranged along the second direction; the fourth and third permanent magnet portions are arranged opposite each other in the second direction, and the magnetic pole directions of both the third and fourth permanent magnet portions are distributed along the second direction, so that the fourth and third permanent magnet portions repel or attract each other in the second direction; The fifth permanent magnet part and the second permanent magnet part are arranged opposite to each other in the optical axis direction. The magnetic pole directions of the second permanent magnet part and the fifth permanent magnet part are both distributed along the optical axis direction. The magnetic pole direction of the second permanent magnet part is opposite to that of the fifth permanent magnet part. The first magnetic part and the second permanent magnet part are arranged opposite to each other in the optical axis direction. The second permanent magnet part and the first magnetic part attract each other. The first magnetic part includes a soft magnetic material, or the first magnetic part includes a permanent magnet material and the magnetic pole direction of the first magnetic part is the same as that of the second permanent magnet part.

[0069] In conjunction with the third aspect, in one possible implementation, the moving magnetic block includes at least one fifth permanent magnet portion and at least one first magnetic portion, wherein at least one fifth permanent magnet portion and at least one first magnetic portion are alternately arranged between the fourth permanent magnet portion and the mover.

[0070] In conjunction with the third aspect, in one possible implementation, the dimension of the second permanent magnet in the second direction is larger than the dimension of the moving magnet in the second direction.

[0071] In conjunction with the third aspect, in one possible implementation, the dimension of the fourth permanent magnet in the second direction is smaller than the dimension of the fifth permanent magnet in the second direction.

[0072] In conjunction with the third aspect, in one possible implementation, the size of the moving magnetic block in the target direction is smaller than the size of the permanent magnet in the target direction.

[0073] In conjunction with the third aspect, in one possible implementation, the fixed magnet assembly further includes a yoke that covers at least a portion of the surface of the permanent magnet facing away from the moving magnet.

[0074] In conjunction with the third aspect, in one possible implementation, the mover and the stator are arranged opposite each other in the optical axis direction, the mover being either a magnet or a coil, and the stator being either a magnet or a coil.

[0075] Fourthly, a voice coil motor is provided, comprising: a housing having a receiving space; a carrier housed in the receiving space, the carrier being used to connect to at least a portion of a lens component; a drive assembly including a stator and a mover, the stator being connected to the housing, the mover being connected to the carrier, the mover and the stator being disposed opposite each other in a target direction perpendicular to the optical axis, and the mover being movable relative to the stator in the target direction; wherein the stator includes a first permanent magnet, the mover includes a second permanent magnet, a magnetic element, and a second winding, the magnetic force between the second permanent magnet and the first permanent magnet in the target direction being a repulsive force, the magnetic element comprising a soft magnetic material such that the magnetic force between the first permanent magnet and the magnetic element in the target direction is an attractive force; the second winding is disposed on one side of the magnetic element in the target direction, the second winding being used to pass current through to change the distance between the stator and the mover in the target direction.

[0076] In this embodiment, the mover is suspended in the receiving space formed by the housing via a driving component. When the mover drives the carrier to move relative to the stator, the mover can move without mechanical friction, greatly reducing the power consumption of the voice coil motor. Furthermore, by adjusting the current in the second winding, the performance of the magnetic components can be controlled, thereby achieving adjustment and control of the magnetic levitation position of the mover. Converting the change in magnetic levitation position into driving force enables the voice coil motor mover to levitate in a target direction, thus achieving the optical image stabilization function of the voice coil motor.

[0077] In conjunction with the fourth aspect, in one possible implementation, when no current is applied to the second winding, the magnetic force between the stator and the mover is used to suspend the mover in a first position within the receiving space, wherein the mover is at a first position and is a first distance from the stator in the target direction; when current is applied to the second winding, the magnetic force between the stator and the mover is used to suspend the mover in a second position within the receiving space, wherein the mover is at a second position and is a second distance from the stator in the target direction, the second distance being different from the first distance.

[0078] In conjunction with the fourth aspect, in one possible implementation, the distance between the mover and the stator in the target direction is changed by altering the magnitude and / or direction of the current flowing through the second winding.

[0079] In conjunction with the fourth aspect, in one possible implementation, the second winding has a dimension smaller than the magnetic element in the first direction, and / or the second winding has a dimension smaller than the magnetic element in the second direction, the first direction being the optical axis direction, the second direction being tangent to the outer periphery of the carrier, and the first direction being perpendicular to the second direction.

[0080] In conjunction with the fourth aspect, in one possible implementation, the second winding is disposed on the side of the magnetic element away from the first permanent magnet, or the second winding is disposed between the magnetic element and the first permanent magnet.

[0081] In conjunction with the fourth aspect, in one possible implementation, the magnetic element includes a second body and a second protrusion extending from the second body along the target direction, the second winding being sleeved on the second protrusion.

[0082] In conjunction with the fourth aspect, in one possible implementation, the size of the second protrusion in the target direction is greater than or equal to the size of the second winding in the target direction; and / or the size of the second protrusion in the target direction is less than the size of the second body in the target direction.

[0083] In conjunction with the fourth aspect, in one possible implementation, the stator further includes a magnetic yoke that covers at least a portion of the surface of the first permanent magnet that is away from the mover.

[0084] In conjunction with the fourth aspect, in one possible implementation, the voice coil motor includes a plurality of drive components, which are uniformly arranged around the periphery of the carrier in the direction of the optical axis.

[0085] Fifthly, a camera module is provided, including a lens and a voice coil motor as described in the first to second aspects and any one of the implementations of the first to second aspects, the voice coil motor being used to drive the lens to move along the optical axis.

[0086] In a sixth aspect, a camera module is provided, including a lens and a voice coil motor as described in the third to fourth aspects and any one of the implementations of the third to fourth aspects, the voice coil motor being used to drive the lens to move in a direction perpendicular to the optical axis.

[0087] In a seventh aspect, an electronic device is provided, including the camera module described in the fifth or sixth aspect above.

[0088] In conjunction with the seventh aspect, in one possible implementation, the electronic device further includes an image processing chip for processing images acquired by the camera module.

[0089] In conjunction with the seventh aspect, in one possible implementation, the electronic device further includes a housing having a receiving space in which the camera module is housed.

[0090] The beneficial effects of the apparatus described in the third to seventh aspects above are the same as those described in the first and second aspects above, and will not be repeated here. Attached Figure Description

[0091] Figure 1 This is a schematic structural diagram of an electronic device to which this application embodiment applies.

[0092] Figure 2 This is a schematic exploded view of a camera module provided in an embodiment of this application.

[0093] Figure 3 This is a schematic cross-sectional view of a camera module provided in an embodiment of this application.

[0094] Figure 4 This is a schematic assembly diagram of a voice coil motor provided in an embodiment of this application.

[0095] Figure 5 This is a schematic exploded view of a voice coil motor provided in an embodiment of this application.

[0096] Figure 6 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0097] Figure 7 yes Figure 6 A schematic diagram of the force analysis of the magnetic levitation component.

[0098] Figure 8 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0099] Figure 9 This is a schematic perspective view of a magnetic levitation component provided in an embodiment of this application.

[0100] Figure 10 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0101] Figure 11 This is a schematic structural diagram of a voice coil motor provided in an embodiment of this application.

[0102] Figure 12 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0103] Figure 13 yes Figure 12 A schematic diagram of the force analysis of the magnetic levitation component.

[0104] Figure 14 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0105] Figure 15 This is a schematic perspective view of a magnetic levitation component provided in an embodiment of this application.

[0106] Figure 16 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0107] Figure 17 This is a schematic structural diagram of a voice coil motor provided in an embodiment of this application.

[0108] Figure 18 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0109] Figure 19 This is a schematic structural diagram of a voice coil motor provided in an embodiment of this application.

[0110] Figure 20 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0111] Figure 21 This is a schematic structural diagram of a magnetic levitation component provided in an embodiment of this application.

[0112] Figure 22 This is a schematic assembly diagram of a voice coil motor provided in an embodiment of this application.

[0113] Figure 23 This is a schematic structural diagram of a driving component provided in an embodiment of this application.

[0114] Figure 24 yes Figure 23 A schematic diagram of the force analysis of the driving components.

[0115] Figure 25 This is a schematic structural diagram of a mover in a driving component provided in an embodiment of this application.

[0116] Figure 26 This is a schematic structural diagram of a mover in a driving component provided in an embodiment of this application.

[0117] Figure 27 This is a schematic structural diagram of a driving component provided in an embodiment of this application.

[0118] Figure 28 This is a schematic structural diagram of a driving component provided in an embodiment of this application.

[0119] Figure 29 This is a schematic structural diagram of a voice coil motor provided in an embodiment of this application.

[0120] Figure 30 This is a schematic block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0121] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0122] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0123] In the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more than two. The singular expressions "a," "an," "the," "the," "this," and "this" are intended to also include expressions such as "one or more," unless the context explicitly indicates otherwise.

[0124] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0125] In the description of the embodiments of this application, the terms "upper," "lower," "inner," "outer," "vertical," and "horizontal," etc., indicate orientations or positional relationships relative to the indicated placement of components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and not to indicate or imply a specific orientation that the device or component must have, or its construction and operation in a specific orientation. They can change accordingly depending on the orientation of the components in the accompanying drawings, and therefore should not be construed as limiting this application. Furthermore, "vertical" in this application is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0126] In the embodiments of this application, the same reference numerals are used to denote the same component or part. For the same part in the embodiments of this application, only one part or component may be labeled with reference numerals in the figures. It should be understood that the reference numerals also apply to other identical parts or components. In addition, the various parts in the figures are not drawn to actual scale, and the dimensions and sizes of the parts shown in the figures are only exemplary and should not be construed as limiting this application.

[0127] To facilitate understanding, the technical terms used in this application will be explained and described below.

[0128] The optical axis is an imaginary line in an optical system, which can be understood as the direction in which light rays travel through the system. For a symmetrical transmission system, the optical axis generally coincides with the rotation center line of the optical system. If a ray of light coincides with the optical axis, it will travel along the optical axis within the optical system.

[0129] Auto focus (AF) is a technique that uses the principle of light reflection from the subject. The light reflected from the subject passes through the lens and is imaged and received on the image sensor. After being processed by a computer, the image sensor drives the focusing device to focus.

[0130] Optical image stabilization (OIS) refers to the use of optical components in imaging instruments such as mobile phones or cameras to avoid or reduce camera shake during the capture of optical signals, thereby improving image quality. A common approach is to use a gyroscope for shake detection, and then use an OIS motor to translate or rotate the entire lens in the opposite direction to compensate for image blur caused by camera shake during exposure.

[0131] A voice coil motor (VCM) is a device that converts electrical energy into mechanical energy. It works by using the interaction between the magnetic field of a permanent magnet and the electromagnetic field generated by a current-carrying coil conductor to produce motion, thereby achieving linear or finite-angle motion.

[0132] A magnet is a substance or material that can generate a magnetic field, or in other words, an object that possesses magnetic properties. Magnets are bipolar; every magnet has two magnetic poles: a magnetic north pole (also called the N pole) and a magnetic south pole (also called the S pole). The strength of the magnetism varies in different parts of a magnet, with the magnetic poles being the strongest points. Magnetic poles interact with each other: like poles repel, and unlike poles attract. Magnets are generally classified into permanent magnets and soft magnets.

[0133] A permanent magnet is a magnet that can maintain its magnetism for a long period of time. Permanent magnets are hard magnets, not easily demagnetized, and not easily magnetized.

[0134] Permanent magnet materials are materials that are difficult to magnetize and difficult to demagnetize once magnetized. Their main characteristic is high coercivity (usually greater than 1000 A / m).

[0135] Soft magnets are those that are easily magnetized, and whose magnetism is easily lost after being magnetized and cannot be maintained for a long time.

[0136] Soft magnetic materials refer to magnetic materials with low coercivity (less than 1000 A / m, usually less than 100 A / m) and high permeability. Their main characteristics are that they are easy to magnetize and easy to demagnetize, and can achieve the maximum magnetization intensity with the minimum external magnetic field.

[0137] Magnetic energy product is an important parameter for measuring the amount of energy stored in a magnet. Specifically, it refers to the product of the magnetic induction intensity B and the magnetic field intensity H at any point on the demagnetization curve of a permanent magnet, i.e., B×H, with units of megagauss-oersted (MGOe). The magnetic energy product reaches its maximum value at a certain point in the middle of the demagnetization curve, which is called the maximum magnetic energy product (BH)max. The maximum magnetic energy product represents the magnetic energy density established by the permanent magnet in the air gap space (i.e., the space between the two magnetic poles of the permanent magnet), and thus reflects the ability of the permanent magnet to do work under specific operating conditions.

[0138] Coercive force refers to the magnetic field strength required to reduce the remanent magnetism (remanent magnetic flux density or remanent magnetization) of a magnetic material to zero after magnetization and subsequent demagnetization. Coercive force is also called coercive magnetic field and is represented by the symbol Hc. Generally, soft magnets have relatively small or very small remanent magnetism, while permanent magnets have relatively large remanent magnetism; therefore, the coercive force of permanent magnets is greater than that of soft magnets.

[0139] It should be noted that the above-described terms and concepts are for illustrative purposes only and should not be construed as limiting the embodiments of this application.

[0140] Figure 1 A schematic structural diagram of an electronic device to which embodiments of this application are applicable is shown.

[0141] In this application, the electronic device involved is an electronic device with imaging capabilities, such as a mobile phone, personal digital assistant (PDA), tablet computer, laptop computer, camera, video recorder, smartwatch, smart bracelet, point of sale (POS) terminal, in-vehicle system, television (e.g., smart screen), wearable device, etc. This application does not impose any special limitations on the specific form of the electronic device. For ease of explanation and understanding, the following description uses a mobile phone as an example.

[0142] For example, Figure 1 Images (a) and (b) schematically show the front and back of the electronic device 100, respectively. Figure 1As shown, the electronic device 100 may include a housing 101, a display panel (DP) 102, and a camera compact module (CCM) 103.

[0143] The housing 101 has a receiving space for accommodating the components of the electronic device 100. The housing 101 also serves to protect the electronic device 100 and support the entire device. The display screen 102 and the camera module 103 are disposed within the receiving space of the housing 101 and connected to the housing 101. In some embodiments, the housing 101 may include a back cover opposite to the display screen 102 and a mid-frame disposed between the back cover and the display screen 102; the display screen 102 and the camera module 103 may be fixed to the mid-frame. The housing 101 may be made of metal, plastic, ceramic, or glass, etc.

[0144] The display screen 102 is used to display images, such as images captured by the camera module 103. The display screen 102 can be a liquid crystal display (LCD) screen, an organic light-emitting diode (OLED) screen, etc. The display screen 102 can be a regular screen, or an irregularly shaped screen, a foldable screen, etc. The display screen 102 can be located on the front and / or back of the electronic device 100. Here, the front of the electronic device 100 can be understood as the side facing the user when using the electronic device 100, and the back of the electronic device 100 can be understood as the side facing away from the user when using the electronic device 100.

[0145] The camera module 103 is used to capture still images or videos. The camera module 103 can be disposed on the front and / or back of the electronic device 100. When the camera module 103 is disposed on the front of the electronic device 100, it can be used to capture images of the scene located on one side of the front of the electronic device 100; in some embodiments, this can be referred to as a front-facing camera. When the camera module 103 is disposed on the back of the electronic device 100, it can be used to capture images of the scene located on one side of the back of the electronic device 100; in some embodiments, this can be referred to as a rear-facing camera. During shooting, the user can select the appropriate camera module according to their shooting needs. In some embodiments, when the display screen 102 can be folded, the camera module 103 can function as either a front-facing camera or a rear-facing camera as the display screen 102 folds. It is understood that the placement of the camera module 103 can be determined according to actual needs. Figure 1 The installation locations shown are merely illustrative.

[0146] In some embodiments, the camera module 103 can be a vertical module or a folding module (or periscope camera module). A vertical camera module can be understood as light entering the camera module directly hitting the image sensor without bending the light path. A folding camera module can be understood as light entering the camera module needing to pass through optical elements such as reflectors, lenses, and prisms before hitting the image sensor, resulting in a folded light path.

[0147] In some embodiments, the camera module 103 may be a telephoto module, a wide-angle module, an ultra-wide-angle module, or a depth-of-field module.

[0148] This application embodiment does not limit the number of camera modules 103; it can be one, two, four, or even more. For example, one or more camera modules 103 can be set on the front of the electronic device 100, and / or one or more camera modules 103 can be set on the back of the electronic device 100. When multiple camera modules 103 are set, they can be identical or different. For example, the multiple camera modules 103 may have different lens optical parameters, different lens placement positions, or different lens shapes. This application embodiment also does not limit the relative positions of the multiple camera modules. For example, one or more of the multiple camera modules 103 can serve as the main camera module. Typically, the main camera module is responsible for the main shooting task, usually has the highest pixel count, and can provide higher resolution and a stronger sensor, thereby meeting the user's photography needs in different scenarios.

[0149] In some embodiments, the electronic device 100 may further include a protective lens 104 for protecting the camera module 103. The protective lens 104 is disposed on the housing 101 and covers the camera module 103. For example, when the protective lens 104 is used to protect the front-facing camera, the protective lens 104 may cover only the front-facing camera module or cover the entire front of the electronic device 100. When the protective lens 104 covers the entire front of the electronic device 100, it can also be used to protect the display screen 102, in which case the protective lens 104 is the cover glass (CG). As another example, when the protective lens 104 is used to protect the rear-facing camera, the protective lens 104 may cover the entire back of the electronic device 100, or it may be disposed only at the position corresponding to the rear-facing camera module.

[0150] In some embodiments, the protective lens 104 may be made of glass, sapphire, ceramic, etc., and this application does not impose any special limitations on it. For example, the protective lens 104 is transparent, and light from outside the electronic device 100 can enter the camera module 103 through the protective lens 104.

[0151] It should be understood that Figure 1 The structure shown in the diagram does not constitute a specific limitation on the electronic device 100. The electronic device 100 may include more or fewer components than shown in the diagram. For example, the electronic device 100 may also include one or more of the following components: battery, flash, earpiece, buttons, sensors, etc. The electronic device 100 may also have a different component arrangement than shown in the diagram.

[0152] Figure 2 and Figure 3 A schematic diagram of the structure of a camera module provided in an embodiment of this application is shown. Figure 2 This is a schematic exploded view of camera module 200. Figure 3 This is a schematic cross-sectional view of the camera module 200. Figure 2 The camera module 200 in the middle can be Figure 1 An exemplary structure of the camera module 103 is shown below. (The following is in conjunction with...) Figure 2 and Figure 3 A brief introduction to the structure of camera module 200.

[0153] For ease of description, the optical axis direction of the camera module 200 is defined as the Z direction, and the two directions perpendicular to the optical axis are the X direction and the Y direction, with the X direction perpendicular to the Y direction. In the Z direction, the side facing the object being photographed is the front side, and the side facing away from the object is the rear side. In the X and Y directions, the direction closer to the optical axis is the inner side, and the direction facing away from the optical axis is the outer side. In this embodiment, the optical axis direction is the direction in which the optical system transmits light.

[0154] Here, the definitions of X, Y, Z directions and front, back, inside, and outside also apply to the various figures described below. It should be noted that the above definitions of X, Y, Z directions and front, back, inside, and outside are merely for the convenience of describing the positional, connection, or motion relationships between the components in the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0155] like Figure 2 and Figure 3 As shown, the camera module 200 may include a housing 201, a lens assembly 202, a lens actuator 203, and a light sensing component 204.

[0156] The outer casing 201 has a receiving space for accommodating the lens assembly 202, lens actuator 203, light sensing component 204, etc. Additionally, the outer casing 201 also serves a protective and supporting function. This is understandable. Figure 2 and Figure 3 The structure of the housing 201 shown is merely exemplary and does not limit the scope of this application. Those skilled in the art can design the shape of the housing 201 according to actual needs.

[0157] The lens assembly 202 mainly includes a lens group 2021 and a lens barrel 2022, wherein the lens group 2021 is housed within the receiving space formed by the lens barrel 2022. The lens assembly 202 is used to image an object-side scene onto an image-side imaging plane. In some embodiments, the lens assembly 202 can also perform certain processing on the received imaging beam, such as aberration correction and chromatic aberration elimination. Here, the imaging beam refers to the beam formed by the light incident on the camera module 200.

[0158] Lens assembly 2021 may include at least one lens (or lens element). The at least one lens may be different or at least partially identical. This application does not specifically limit the number of lenses included in lens assembly 2021; those skilled in the art can set the number of lenses according to actual needs, such as 1, 2, 3, 5, 8, or more.

[0159] The focal length of lens group 2021 can be fixed, and correspondingly, lens assembly 202 is a prime lens. Alternatively, the focal length of lens group 2021 can be adjusted, and correspondingly, lens assembly 202 is a zoom lens. For example, the focal length of lens group 2021 can be adjusted by changing the relative positions of the lenses within it.

[0160] The lens barrel 2022 has a receiving space, primarily for accommodating the lens assembly 2021. In some embodiments, the lens barrel 2022 can be a single unit, with the lens assembly 2021 housed within this single unit. In other embodiments, the lens barrel 2022 may also comprise multiple lens barrel sections, with the lens groups of the lens assembly 2021 disposed within these multiple lens barrel sections, wherein each lens barrel section and the lenses housed therein can be referred to as a lens group. Exemplarily, the relative positions between these multiple lens barrel sections can be adjusted, enabling optical zoom by adjusting the relative positions of the lenses.

[0161] Understandable. Figure 2 and Figure 3 The structure of the lens barrel 2022 and the connection method between the lens group 2021 and the lens barrel 2022 are merely exemplary and do not limit the embodiments of this application.

[0162] The lens actuator 203 is used to move the lens assembly 202 to achieve autofocus and / or optical image stabilization. In some embodiments, the lens actuator 203 may also be referred to as a lens motor, or simply a motor.

[0163] like Figure 3As shown, the lens assembly actuator 203 may include a motor 2031 (hereinafter referred to as the AF motor) for moving the lens assembly 202 for AF and / or a motor 2032 (hereinafter referred to as the OIS motor) for moving the lens assembly 202 for OIS. Specifically, the AF motor 2031 is used to move the lens assembly 202 for autofocus in the Z direction, and the OIS motor 2032 is used to move the lens assembly 202 for optical image stabilization in the X and / or Y directions. In some embodiments, the AF motor 2031 and the OIS motor 2032 may be two independent components, each independently driving the lens assembly 202 for AF and OIS. Alternatively, the AF motor 2031 and the OIS motor 2032 may be integrated into one unit, with a single motor driving the lens assembly 202 for AF and OIS. Figure 3 The exemplary embodiment shows that the mirror assembly actuator 203 includes separate AF motor 2031 and OIS motor 2032, but it should be understood that the embodiments of this application are not limited thereto.

[0164] In some embodiments, the AF motor 2031 or the OIS motor 2032 can be used to move the entire lens assembly 202, or to move a portion of the lens assembly 202. For example, if a portion of the lens assembly 202 (such as the first lens group) is relatively fixed and another portion (such as the second lens group) is movable, the AF motor 2031 or the OIS motor 2032 can drive the movable portion to move, thereby changing the optical path to achieve the desired function.

[0165] For example, such as Figure 3 As shown, the AF motor 2031 is connected to the lens barrel 2022 in the lens assembly 202. During autofocus, the AF motor 2031 can drive the lens barrel 2022 to move along the optical axis (i.e., the Z-axis), thereby changing the distance from the optical center of the lens group 2021 to the imaging plane (i.e., changing the image distance) to obtain a sharp image. It should be understood that the figure only schematically shows the location of the AF motor 2031 and does not impose any limitations on the specific structure of the AF motor 2031.

[0166] For example, such as Figure 3 As shown, the OIS motor 2032 is connected to the lens barrel 2022 in the lens assembly 202. During optical image stabilization, the OIS motor 2032 can drive the lens barrel 2022 to move along the direction perpendicular to the optical axis (i.e., the X and / or Y directions), thereby causing the focus of the lens group 2021 to deviate from the optical axis to obtain a sharp image. It should be understood that the figure only schematically shows the location of the OIS motor 2032 and does not impose any limitations on the specific structure of the OIS motor 2032.

[0167] The light sensing component 204 is disposed on the rear side of the lens assembly 202 and is mainly used for imaging. For example, the light sensing component 204 may include a filter, an image sensor, a circuit board, etc., wherein the filter is disposed between the lens assembly 202 and the image sensor.

[0168] Optical filters can eliminate unwanted light projected onto an image sensor, preventing problems such as ghosting, stray light, and color cast during image formation. For example, an infrared cutoff filter or a filter that blocks other light wavelengths can be used.

[0169] An image sensor is a semiconductor chip used to convert collected ambient light signals into electrical signals. Specifically, the surface of an image sensor contains hundreds of thousands to millions of photodiodes. These photodiodes generate charges when illuminated, thereby converting the light signals captured by the lens assembly 202 into electrical signals. For example, an image sensor can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) device.

[0170] The circuit board is used to transmit electrical signals; it can be a flexible printed circuit (FPC) or a printed circuit board (PCB). The image sensor can be electrically connected to the circuit board via wires to extract the signal.

[0171] In some embodiments, the light sensing component 204 may further include a microelectromechanical system (MEMS) actuator for driving the image sensor to move along the optical axis and / or perpendicular to the optical axis, thereby achieving autofocus and / or optical image stabilization. The MEMS actuator can be driven by electrostatic force, magnetoelectric force, piezoelectric force, thermoelectric force, etc. It should be understood that the specific structure of the MEMS actuator can be designed and selected according to the chosen driving method, and this application does not limit this.

[0172] It should be understood that Figure 2 and Figure 3 The structure shown in the diagram does not constitute a specific limitation on the camera module 200. The camera module 200 may include more or fewer components than shown in the diagram. For example, the camera module 200 may also include connectors and peripheral electronic components, which will not be described in detail here.

[0173] With the continuous development of electronic device technology, shooting function has become an important feature of electronic devices (such as mobile phones, tablets, etc.) and a major indicator for evaluating the performance of electronic devices. To improve shooting quality and enhance the user's shooting experience, cameras in electronic devices often have autofocus and / or optical image stabilization functions. A voice coil motor is a device that converts electrical energy into mechanical energy. It has advantages such as simple structure, small size, and fast response speed, and is therefore commonly used in cameras to achieve autofocus and / or optical image stabilization. However, existing voice coil motors (such as spring-type voice coil motors, sliding shaft-type voice coil motors, and ball-type voice coil motors) generally suffer from high power consumption. For example, in a spring-type voice coil motor, the elastic deformation of the spring during the movement of the mover increases the motor's power consumption; similarly, in sliding shaft-type and ball-type voice coil motors, the friction generated during the movement of the mover increases the motor's power consumption.

[0174] Therefore, this application provides a voice coil motor that can reduce the power consumption of the motor, thereby reducing the impact of the voice coil motor's heat generation on surrounding components and extending the battery life of electronic devices. A detailed description is provided below with reference to the accompanying drawings.

[0175] Figure 4 and Figure 5 A schematic structural diagram of a voice coil motor provided in an embodiment of this application is shown, wherein... Figure 4 This is an assembly diagram of the voice coil motor 300. Figure 5 This is an exploded view of the voice coil motor 300. Figure 4 and Figure 5 The voice coil motor 300 shown can be applied to Figure 2 In the camera module 200 shown, for example, the voice coil motor 300 can be Figure 2 A specific example of the AF motor 2031 or OIS motor 2032 shown.

[0176] refer to Figure 4 and Figure 5 The voice coil motor 300 includes a base 1, a cover 2, a carrier 3, a drive assembly 4, and a magnetic levitation assembly 5. The cover 2 and the base 1 are fastened together to form a receiving space for accommodating the carrier 3, the drive assembly 4, and the magnetic levitation assembly 5. In this embodiment, the base 1 and the cover 2 form the housing 301 of the voice coil motor. The drive assembly 4 includes a stator 41 and a mover 42. The stator 41 is connected to the housing 301 (e.g., the base 1), and the mover 42 is connected to the carrier 3. The mover 42 can move relative to the stator 41 in a target direction, thus driving the carrier 3 to move. Accordingly, the carrier 3 is a movable component, and the base 1 and the cover 2 are fixed components. The carrier 3 is connected to at least a portion of the lens components (not shown in the figures, e.g., [missing information]). Figure 3The lens barrel 2022 shown is connected to the carrier 3, which can drive at least part of the lens to move under the drive of the mover 42. The magnetic levitation assembly 5 uses magnetic force to levitate the mover 42 in the receiving space formed by the housing 301.

[0177] Specifically, the magnetic levitation assembly 5 includes a fixed magnetic assembly 501 and a moving magnetic assembly 502. The fixed magnetic assembly 501 is connected to the housing 301 (e.g., base 1), and the moving magnetic assembly 502 is correspondingly disposed to the fixed magnetic assembly 501. The moving magnetic assembly 502 is connected to the mover 42 or the carrier 3. A magnetic force perpendicular to the target direction is generated between the moving magnetic assembly 502 and the fixed magnetic assembly 501. This magnetic force is balanced with each other in a plane perpendicular to the target direction to maintain the gap between the moving magnetic assembly 502 and the fixed magnetic assembly 501.

[0178] In this embodiment, the magnetic force generated between the moving magnet assembly 502 and the fixed magnet assembly 501, perpendicular to the target direction, maintains a certain gap between them. Since the fixed magnet assembly 501 is connected to the housing 301 and the moving magnet assembly 501 is connected to the mover 42 or the carrier 3, a certain gap is also maintained between the mover 42 and the carrier 3 and the housing 301 or the stator 41 in a direction perpendicular to the target direction. This can be understood as the mover 42 being suspended in the accommodating space formed by the housing 301 in a direction perpendicular to the target direction via the magnetic levitation assembly 5. Thus, when the mover 42 drives the carrier 3 to move relative to the stator 41, there is no sliding friction between the moving and fixed components within the motor, allowing the mover 42 to move without mechanical friction, significantly reducing the power consumption of the voice coil motor. When the voice coil motor 300 is applied to a camera module, it can reduce the impact of the voice coil motor's heat generation on surrounding components. When a camera module including a voice coil motor 300 is applied to an electronic device, it can extend the battery life of the electronic device.

[0179] Furthermore, there is no direct contact between the moving parts (such as the mover 42, moving magnet assembly 502, etc.) and the stationary parts (such as the stator 41, housing 301, fixed magnet assembly 501, etc.) inside the motor. Therefore, the moving parts achieve virtually zero wear and require no lubrication, which can extend the service life of the voice coil motor. At the same time, the frictionless movement of the moving parts can reduce the noise during motor operation.

[0180] It should be noted that the moving magnetic component 502 and the fixed magnetic component 501 are set in a corresponding manner. This can be understood as the setting positions of the moving magnetic component 502 and the fixed magnetic component 501 causing a magnetic force perpendicular to the target direction to be generated between the moving magnetic component 502 and the fixed magnetic component 501.

[0181] In this embodiment, the magnetic levitation component 5 can levitate the actuator 42 in various ways, which will be described in detail below with reference to the accompanying drawings.

[0182] It should be noted that, for ease of description and understanding, the following embodiments are illustrated using the voice coil motor 300 for autofocus, meaning that in the following embodiments, the mover 42 moves relative to the stator 41 along the optical axis (Z direction as shown in the figure). However, it can be understood that the voice coil motor 300 can also be used for optical image stabilization, meaning that the mover 42 can move relative to the stator 41 in a direction perpendicular to the optical axis (X direction or Y direction as shown in the figure).

[0183] In some embodiments, the magnetic force generated between the moving magnetic component 502 and the fixed magnetic component 501 includes a magnetic force in a first direction (e.g., the X direction shown in the figure) and a magnetic force in a second direction (e.g., the Y direction shown in the figure). The magnetic force in the first direction is used to maintain a gap between the moving magnetic component 502 and the fixed magnetic component 501 in the first direction, and the magnetic force in the second direction is used to maintain a gap between the moving magnetic component 502 and the fixed magnetic component 501 in the second direction. Both the first and second directions are perpendicular to the optical axis direction, and the first and second directions are perpendicular to each other.

[0184] The magnetic force generated between the moving magnetic component 502 and the fixed magnetic component 501 ensures that there is a certain gap between them in the first and second mutually perpendicular directions. This allows the moving part 42 and the carrier 3 to be more stably suspended in the housing 301, thereby improving the accuracy of motion control of the moving part 42 in the optical axis direction.

[0185] In some embodiments, reference Figure 5 The fixed magnet assembly 501 includes at least one permanent magnet group 5a, and each permanent magnet group 5a includes two permanent magnet elements 51. The moving magnet assembly 502 includes moving magnet blocks 52 arranged in a one-to-one correspondence with the permanent magnet elements 51. The two permanent magnet elements 51 in each permanent magnet group 5a are respectively disposed at both ends of the two moving magnet blocks 52 corresponding to them in a first direction (such as the X direction). Specifically, in each permanent magnet group 5a, the magnetic force between any one of the two permanent magnet elements 51 and its corresponding moving magnet block 52 in the first direction is a repulsive force, or the magnetic force between any one of the two permanent magnet elements 51 and its corresponding moving magnet block 52 in the first direction is an attractive force.

[0186] Thus, the two moving magnetic blocks 52 corresponding to the two permanent magnets 51 in the permanent magnet group 5a are subjected to magnetic forces in opposite directions in the first direction, which can maintain a gap between the two moving magnetic blocks 52 and their respective permanent magnets 51, thereby achieving levitation in the first direction.

[0187] Here, for each permanent magnet group 5a, the first direction is the arrangement direction of the two moving magnetic blocks 52 corresponding to the two permanent magnets 51 within the permanent magnet group 5a, that is, the arrangement direction of the two permanent magnets 51 within the permanent magnet group 5a. In other words, within a permanent magnet group 5a, the two moving magnetic blocks 52 corresponding to the two permanent magnets 51 within that permanent magnet group 5a are disposed between the two permanent magnets 51.

[0188] In some embodiments, two moving magnet blocks 52 corresponding to the permanent magnet group 5a are respectively connected to the two ends of the mover 42 in the first direction. Here, the mover 42 connected to the two moving magnet blocks 52 corresponds to the permanent magnet group 5a.

[0189] Two moving magnetic blocks 52 are disposed at both ends of the moving element 42 in the first direction. On the one hand, this facilitates the connection between the moving element 42 and the carrier 3, and on the other hand, it helps the moving element 42 to be balanced by forces, so that the moving element 42 can be suspended in the first direction.

[0190] It is understood that the two moving magnets 52 and the mover 42 can be directly connected or indirectly connected, and this application does not limit this.

[0191] For example, in the permanent magnet assembly 5a, one permanent magnet 51 and its corresponding moving magnet 52 and another permanent magnet 51 and its corresponding moving magnet 52 are symmetrically arranged on both sides of the mover 42 in the first direction.

[0192] In some embodiments, the drive assembly 4 may include at least one stator 41 and at least one mover 42, with the stator 41 and mover 42 correspondingly arranged. For example, if the drive assembly 4 includes one mover 42 and one stator 41, the mover 42 may be connected to a moving magnetic block 52 corresponding to one of the permanent magnet groups 5a. The moving magnetic blocks 52 corresponding to the remaining permanent magnet groups 5a may be connected to the carrier 3. Furthermore, if the drive assembly 4 includes multiple movers 42 and multiple stators 41, each moving magnetic block 52 corresponding to each permanent magnet group 5a may correspond to one mover 42, such as being connected to the corresponding mover 42.

[0193] By way of example and not limitation, the number of movers 42 included in the drive assembly 4 is the same as the number of permanent magnet groups 5a included in the stationary magnet assembly 501. In this way, when the movers 42 drive the carrier 3 to move, the movement of the carrier 3 is more stable.

[0194] In some embodiments, reference Figure 5 The fixed magnet assembly 501 may include two permanent magnet groups 5a, which are symmetrically arranged on both sides of the carrier 3 in the second direction (such as the Y direction).

[0195] The two permanent magnet groups 5a are symmetrically arranged in the second direction, which enables the moving part of the voice coil motor to maintain a gap between the moving part and the fixed part in the second direction, thereby achieving levitation in the second direction.

[0196] In other embodiments, the fixed magnet assembly 501 may include four permanent magnet groups 5a, two of which are symmetrically arranged on both sides of the carrier 3 in a second direction (e.g., the Y direction), and the other two of which are symmetrically arranged on both sides of the carrier 3 in a first direction (e.g., the X direction). For the two permanent magnet groups 5a arranged in the first direction of the carrier 3, the two permanent magnets 51 in each permanent magnet group 5a are arranged along the second direction, and the corresponding two moving magnets 52 are arranged along the second direction.

[0197] The above combination Figure 5 A brief introduction to magnetic levitation component 5 is provided below, along with the attached diagram. Figures 6 to 18 A more detailed description will follow. For ease of description and understanding, the following figures primarily use a permanent magnet group 5a from the fixed magnet assembly 501 as an example to illustrate its relationship with the corresponding moving magnet block 52, mover 42, and stator 41. The relevant embodiments also apply to other permanent magnet groups 5a (if any).

[0198] Figure 6 A partial structural schematic diagram of a magnetic levitation component provided in an embodiment of this application is shown.

[0199] like Figure 6 As shown, the aforementioned permanent magnet assembly 5a includes two permanent magnet elements 51, and the aforementioned moving magnet assembly 502 includes moving magnet blocks 52 corresponding one-to-one with the two permanent magnet elements 51. The two moving magnet blocks 52 are symmetrically arranged (e.g., symmetrical about the first plane 503) at both ends of the mover 42 in a first direction (e.g., the X direction), and the two permanent magnet elements 51 are symmetrically arranged (e.g., symmetrical about the first plane 503) at both ends of the two moving magnet blocks 52 in the first direction. In other words, the two moving magnet blocks 52 and the mover 42 are disposed between the two permanent magnet elements 51. The first plane 503 is perpendicular to the first direction. For example, the first plane 503 can be a symmetrical plane of the drive assembly 4 in the first direction. In some embodiments, a permanent magnet element 51 and a corresponding moving magnet block 52 can be referred to as a levitation unit, such as... Figure 6 The dashed box shown in the diagram. The permanent magnet 51 is connected to the housing 301, and the moving magnet 52 is connected to the mover 42.

[0200] refer to Figure 6Taking one of the permanent magnet components as an example, the permanent magnet component 51 includes a first permanent magnet portion 511, a second permanent magnet portion 512, and a third permanent magnet portion 513. The first permanent magnet portion 511 and the second permanent magnet portion 512 are disposed opposite each other in a second direction (e.g., the Y direction shown in the figure), and the third permanent magnet portion 513 is located between the first permanent magnet portion 511 and the second permanent magnet portion 512. The first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 surround a receiving space 504, which has an opening facing the mover 42. Exemplarily, the first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 form a U-shaped structure.

[0201] The moving magnetic block 52 includes a fourth permanent magnet part 521 and a fifth permanent magnet part 522. The fourth permanent magnet part 521 and the fifth permanent magnet part 522 are arranged sequentially in a first direction (such as the X direction) and are connected to each other. The fifth permanent magnet part 522 is located between the fourth permanent magnet part 521 and the mover 42. That is, the fourth permanent magnet part 521 is located at the end of the fifth permanent magnet part 522 closer to the third permanent magnet part 513 in the first direction, that is, the fourth permanent magnet part 521 is closer to the third permanent magnet part 513 than the fifth permanent magnet part 522.

[0202] At least a portion of the moving magnetic block 52 is located within the receiving space 504 (e.g., a U-shaped structure) formed by the permanent magnet 51. The fourth permanent magnet portion 521 and the third permanent magnet portion 513 are disposed opposite each other in a first direction (e.g., the X direction), and the fifth permanent magnet portion 522 is located between the first permanent magnet portion 511 and the second permanent magnet portion 512 in a second direction (e.g., the Y direction). Specifically, the projection of the fourth permanent magnet portion 521 in the first direction (e.g., the X direction) overlaps with the projection of the third permanent magnet portion 513 in the first direction; the projection of the fifth permanent magnet portion 522 in the second direction (e.g., the Y direction) overlaps with the projection of the first permanent magnet portion 511 in the second direction; and the projection of the fifth permanent magnet portion 522 in the second direction overlaps with the projection of the second permanent magnet portion 512 in the second direction. For example, the overlapping area of ​​the projections of the fifth permanent magnet portion 522 and the first permanent magnet portion 511 in the first direction is equal to the overlapping area of ​​the projections of the fifth permanent magnet portion 522 and the second permanent magnet portion 512 in the first direction.

[0203] The magnetic pole directions of the first permanent magnet section 511, the second permanent magnet section 512, and the fifth permanent magnet section 522 are all distributed along a second direction (e.g., the Y direction). Specifically, the magnetic pole direction of the first permanent magnet section 511 is the same as that of the second permanent magnet section 512, while the magnetic pole direction of the fifth permanent magnet section 522 is opposite to that of the first permanent magnet section 511 (or the second permanent magnet section 512). Thus, the fifth permanent magnet section 522 repels the first permanent magnet section 511 in the second direction and also repels the second permanent magnet section 512. For example, Figure 6The arrowed lines marking each permanent magnet section indicate the direction of its magnetic pole. Taking the arrowed lines pointing from the North Pole (N pole) to the South Pole (S pole) as an example, the end of the first permanent magnet section 511 closest to the fifth permanent magnet section 522 is the S pole, and the end of the fifth permanent magnet section 522 closest to the first permanent magnet section 511 is the S pole. The end of the second permanent magnet section 512 closest to the fifth permanent magnet section 522 is the N pole, and the end of the fifth permanent magnet section 522 closest to the second permanent magnet section 512 is the N pole. In other words, the two ends of the first permanent magnet section 511 and the fifth permanent magnet section 522 that are close to each other are magnetic poles of the same name (or have the same magnetism), and the two ends of the second permanent magnet section 512 and the fifth permanent magnet section 522 that are close to each other are magnetic poles of the same name (or have the same magnetism).

[0204] Therefore, refer to Figure 7 For the levitation unit on the left, the fifth permanent magnet 522 in the moving magnetic block 52 is subjected to a repulsive force Fy1 along the second direction generated by the corresponding first permanent magnet 511, and a repulsive force Fy2 along the second direction generated by the corresponding second permanent magnet 512. The magnitudes of the repulsive forces Fy1 and Fy2 are equal, but their directions are opposite. Similarly, for the levitation unit on the right, the fifth permanent magnet 522 in the moving magnetic block 52 is subjected to a repulsive force Fy3 along the second direction generated by the corresponding first permanent magnet 511, and a repulsive force Fy4 along the second direction generated by the corresponding second permanent magnet 512. The magnitudes of the repulsive forces Fy3 and Fy4 are equal, but their directions are opposite. Since both moving magnetic blocks 52 are connected to the mover 42, the structure consisting of the mover 42 and the two moving magnetic blocks 52 connected to the mover 42 can be levitated in the second direction.

[0205] Return to reference Figure 6 The magnetic poles of the third permanent magnet 513 are opposite to those of the fourth permanent magnet 521, and both are distributed along a first direction (e.g., the X direction). Thus, the fourth permanent magnet 521 and the third permanent magnet 513 repel each other in the first direction. For example, refer to... Figure 6 Taking the line with the arrow indicating the direction from the N pole to the S pole as an example, the end of the third permanent magnet 513 closest to the fourth permanent magnet 521 is the S pole, and the end of the fourth permanent magnet 521 closest to the third permanent magnet 513 is also the S pole. In other words, the two ends of the third permanent magnet 513 and the fourth permanent magnet 521 that are close to each other are magnetic poles of the same name.

[0206] Therefore, refer to Figure 7For the levitation unit on the left, the fourth permanent magnet portion 521 in the moving magnetic block 52 is subjected to a repulsive force Fx1 along the first direction generated by the corresponding third permanent magnet portion 513. For the levitation unit on the right, the fourth permanent magnet portion 521 in the moving magnetic block 52 is subjected to a repulsive force Fx2 along the first direction generated by the corresponding third permanent magnet portion 513. The repulsive forces Fx1 and Fx2 are equal in magnitude and opposite in direction. Since both moving magnetic blocks 52 are connected to the mover 42, the structure formed by the mover 42 and the two moving magnetic blocks 52 connected to the mover 42 can be levitated in the first direction.

[0207] based on Figure 6 The magnetic levitation component 5 shown can levitate the mover 42 through the repulsive force between the magnetic poles. Generally, the repulsive force between two like magnetic poles increases significantly as the distance between them decreases; therefore, when... Figure 6 When the magnetic levitation component 5 shown is applied to the camera module, it can achieve the purpose of levitation of the mover 42 even in extremely narrow spaces.

[0208] Understandable. Figure 6 The magnetic pole directions of the various permanent magnet sections shown are merely exemplary; in some other embodiments, Figure 6 The magnetic pole directions of each permanent magnet in the magnetic levitation assembly 5 shown can be completely reversed, or the magnetic pole directions of each permanent magnet in the left or right levitation unit can be completely reversed, which can also achieve a repulsive force between the permanent magnet 51 and the moving magnetic block 52.

[0209] In other embodiments, the permanent magnet 51 and the moving magnet 52 may also interact with an attractive force to achieve levitation of the mover 42. Specifically, refer to Figure 8 The magnetic pole directions of the first permanent magnet 511, the second permanent magnet 512, and the fifth permanent magnet 522 are the same, and all are distributed along a second direction (e.g., the Y direction). Thus, the fifth permanent magnet 522 is attracted to the first permanent magnet 511 and the second permanent magnet 512 in the second direction. The magnetic pole direction of the third permanent magnet 513 is the same as that of the fourth permanent magnet 521, and both are distributed along a first direction (e.g., the X direction). Thus, the third permanent magnet 513 is attracted to the fourth permanent magnet 521 in the first direction.

[0210] Therefore, similar to Figure 7For the levitation units on the left and right sides, the fifth permanent magnet portion 522 in each moving magnetic block 52 is subjected to the gravitational force along the second direction from the corresponding first permanent magnet portion 511 and second permanent magnet portion 512. The gravitational force exerted by the first permanent magnet portion 511 on the fifth permanent magnet portion 522 is equal in magnitude and opposite in direction to the gravitational force exerted by the second permanent magnet portion 512 on the fifth permanent magnet portion 522. Therefore, the structure consisting of the mover 42 and the two moving magnetic blocks 52 connected to the mover 42 can achieve levitation in the second direction.

[0211] Similar to Figure 7 For the levitation units on the left and right sides, the fourth permanent magnet 521 in the two moving magnetic blocks 52 are respectively subjected to an attractive force along the first direction. The two attractive forces are equal in magnitude and opposite in direction. Therefore, the structure consisting of the mover 42 and the two moving magnetic blocks 52 connected to the mover 42 can be levitated in the first direction.

[0212] Understandable. Figure 8 The magnetic pole directions of the various permanent magnet sections shown are merely exemplary; in some other embodiments, Figure 8 The magnetic pole directions of each permanent magnet in the magnetic levitation assembly 5 shown can be completely reversed, or the magnetic pole directions of each permanent magnet in the left levitation unit or the right levitation unit 502 can be completely reversed, which can also achieve an attractive force between the permanent magnet 51 and the moving magnetic block 52.

[0213] In some other embodiments, the corresponding permanent magnet 51 and the moving magnet 52 may also have an attractive force interacting along a first direction (e.g., the X direction) and a repulsive force interacting along a second direction (e.g., the Y direction) to achieve levitation of the mover 42. For example, the magnetic pole direction of the third permanent magnet 513 and the magnetic pole direction of the fourth permanent magnet 521 are distributed along the first direction and have the same magnetic pole direction. The magnetic pole direction of the first permanent magnet 511 and the magnetic pole direction of the second permanent magnet 512 are distributed along the second direction and have the same magnetic pole direction. The magnetic pole direction of the fifth permanent magnet 522 is distributed along the second direction and is opposite to the magnetic pole direction of the first permanent magnet 511 (or the second permanent magnet 512).

[0214] In some other embodiments, a repulsive force interacting along a first direction (e.g., the X direction) and an attractive force interacting along a second direction (e.g., the Y direction) may exist between the permanent magnet 51 and the moving magnet 52 to achieve levitation of the mover 42. For example, the magnetic pole direction of the third permanent magnet 513 is distributed along the first direction and opposite to that of the fourth permanent magnet 521. The magnetic pole directions of the first permanent magnet 511, the second permanent magnet 512, and the fifth permanent magnet 522 are all distributed along the second direction and are all the same.

[0215] based on Figure 6The following is a more detailed description of the specific arrangement of the permanent magnet 51 and the moving magnet 52, based on the structure shown.

[0216] In some embodiments, the first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 in the permanent magnet component 51 may be arranged in a U-shape, wherein the third permanent magnet portion 513 is located at the bottom of the U-shaped structure. For example, the permanent magnet component 51 is U-shaped in a cross section perpendicular to the direction of movement of the mover 42 (such as the optical axis direction).

[0217] In some embodiments, the first permanent magnet 511 and the second permanent magnet 512 may be the same or different (e.g., different types and / or different models).

[0218] Generally, permanent magnets are mainly distinguished by their raw materials; that is, different raw materials result in different types of permanent magnets. For example, the raw materials of permanent magnets may include at least one of the following: AlNiCo permanent magnet materials, IronChromiumCo permanent magnet materials, Ferrite permanent magnet materials (such as barium ferrite, Strontium ferrite, etc.), Rare earth permanent magnet materials (such as Neodymium Iron Boron, Samarium Cobalt, etc.), and composite permanent magnet materials (such as nanocomposite permanent magnet materials).

[0219] The models of permanent magnets (such as magnets) are mainly distinguished by their magnetic energy product and coercivity; that is, different magnetic energy products or coercivity result in different models of permanent magnets. For example, permanent magnets made of different materials may have different magnetic energy products when they are of the same specifications; and permanent magnets made of the same material may have different magnetic energy products when they are of different specifications.

[0220] Taking magnets as an example, in actual production, the type and model of magnets are usually indicated by a grade. For example, a magnet with the grade N54 indicates that the material of the magnet is neodymium iron boron and the maximum energy product is 54 MGOe. Another example is a magnet with the grade N56SH, where N56 represents the energy product and SH represents the coercivity level.

[0221] If the first permanent magnet part 511 and the second permanent magnet part 512 are of the same type and model, then when the moving magnetic block 52 is in a balanced state, the moving magnetic block 52 is located in the middle position between the first permanent magnet part 511 and the second permanent magnet part 512. Accordingly, the distance between the moving magnetic block 52 and the first permanent magnet part 511 is equal to or substantially equal to the distance between the moving magnetic block 52 and the second permanent magnet part 512, which facilitates the control of the position of the moving magnetic block 52 and facilitates the design of the dimensional parameters of other components that cooperate with the moving magnetic block 52.

[0222] If the first permanent magnet 511 and the second permanent magnet 512 are of different types and / or models, then when the moving magnet 52 is in a balanced state, the moving magnet 52 can deviate from the midpoint between the first permanent magnet 511 and the second permanent magnet 512. Accordingly, the moving magnet 52 can be closer to the first permanent magnet 511 or closer to the second permanent magnet 512, thereby adjusting the distance between the stator 41 and the mover 42.

[0223] In some embodiments, the third permanent magnet 513 may be the same as or different from the first permanent magnet 511 (or the second permanent magnet 512) in terms of type and model (e.g., different types and / or different models).

[0224] In some embodiments, the first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 can be directly connected, for example, the three can be bonded together as one unit. Alternatively, the first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 can be connected together by additional structural members, for example, all three can be fixed to the first support member.

[0225] In some embodiments, any one of the first permanent magnet part 511, the second permanent magnet part 512, and the third permanent magnet part 513 can be an integral structure (i.e., an indivisible whole before assembly) or can be composed of multiple permanent magnet parts with the same magnetic pole direction.

[0226] In some embodiments, the fourth permanent magnet portion 521 and the fifth permanent magnet portion 522 in the moving magnetic block 52 can be arranged in a "I" shape. For example, the moving magnetic block 52 is arranged in a "I" shape in a cross section perpendicular to the movement direction (such as the Z direction) of the mover 42.

[0227] In some embodiments, the fourth permanent magnet 521 and the fifth permanent magnet 522 may be the same or different (e.g., different types and / or different models).

[0228] In some embodiments, the fourth permanent magnet portion 521 and the fifth permanent magnet portion 522 can be directly connected, for example, they can be bonded together as a single unit. Alternatively, the fourth permanent magnet portion 521 and the fifth permanent magnet portion 522 can be connected together by an additional structural member, for example, both can be fixed to the second support member 505, wherein there may be a gap between the fourth permanent magnet portion 521 and the fifth permanent magnet portion 522, or there may be no gap. In some embodiments, the mover 42 can also be fixed to the second support member 505 to achieve an indirect connection with the moving magnetic block 52.

[0229] In some embodiments, the fourth permanent magnet portion 521 or the fifth permanent magnet portion 522 may be an integral structure or may be composed of multiple permanent magnet portions with the same magnetic pole direction.

[0230] In some embodiments, reference Figure 9The dimensions L1 of the first permanent magnet part 511 in the first direction (e.g., the X direction) and L2 of the second permanent magnet part 512 in the first direction can be equal. The dimensions T1 of the first permanent magnet part 511 in the second direction (e.g., the Y direction) and T2 of the second permanent magnet part 512 in the second direction can be equal. The dimensions W1 of the first permanent magnet part 511 in the direction of motion (e.g., the Z direction) and W2 of the second permanent magnet part 512 in the direction of motion can be equal.

[0231] The first permanent magnet part 511 and the second permanent magnet part 512 have the same size parameters, which can establish a symmetrical magnetic field environment between the first permanent magnet part 511 and the second permanent magnet part 512, so that the moving magnetic block 52 is located in the middle position between the first permanent magnet part 511 and the second permanent magnet part 512 in the second direction.

[0232] It is understood that in some other embodiments, the size parameters of the first permanent magnet part 511 and the second permanent magnet part 512 may also be different, as long as the fifth permanent magnet part 522 is always located in the accommodating space 504 during the movement. For example, in the second direction, the projected overlap area of ​​the fifth permanent magnet part 522 and the first permanent magnet part 511 is equal to the projected overlap area of ​​the fifth permanent magnet part 522 and the second permanent magnet part 512. Accordingly, the fifth permanent magnet part 522 can also be realized to be located in the middle position between the first permanent magnet part 511 and the second permanent magnet part 512 in the second direction.

[0233] In some embodiments, reference Figure 9 The dimension T4 of the fourth permanent magnet part 521 in the second direction and the dimension T5 of the fifth permanent magnet part 522 in the second direction can be equal. The dimension W4 of the fourth permanent magnet part 521 in the motion direction and the dimension W5 of the fifth permanent magnet part 522 in the motion direction can be equal.

[0234] The fourth permanent magnet part 521 and the fifth permanent magnet part 522 have the same dimensions in the second direction and the motion direction, respectively, which facilitates the layout and arrangement of the fourth permanent magnet part 521 and the fifth permanent magnet part 522.

[0235] It is understood that in some other embodiments, the dimensional parameters of the fourth permanent magnet 521 and the fifth permanent magnet 522 may also be different in the second direction and the direction of motion.

[0236] In some embodiments, reference Figure 9 The dimension L4 of the fourth permanent magnet portion 521 in the first direction is smaller than the dimension L5 of the fifth permanent magnet portion 522 in the first direction. For example, L4 is less than or equal to 1 / 2 of L5. Further, L4 may be greater than or equal to 1 / 10 of L5.

[0237] By limiting the size of the fourth permanent magnet 521 in the first direction, the space occupied by the fourth permanent magnet 521 can be reduced. Thus, given a fixed accommodating space 504 formed by the permanent magnet 51, the size of the fifth permanent magnet 522 in the first direction can be increased. Correspondingly, the magnetic force of the fifth permanent magnet 522 is enhanced, which helps reduce the difficulty of balancing the fifth permanent magnet 522 in the second direction. When the fifth permanent magnet 522 is levitated in the second direction, its displacement in the first direction is small, and balance in the first direction can be achieved more easily.

[0238] In some embodiments, the dimension L1 of the first permanent magnet portion 511 in a first direction (such as the X direction) (or the dimension L2 of the second permanent magnet portion 512 in the first direction) is greater than the dimension of the moving magnetic block 52 in the first direction (i.e., the sum of the dimensions L4 of the fourth permanent magnet portion 521 in the first direction and the dimension L5 of the fifth permanent magnet portion 522 in the first direction). For example, L1 is greater than or equal to the gap between the fourth permanent magnet portion 521 and the third permanent magnet portion 513, and the sum of L4 and L5.

[0239] The first permanent magnet part 511 or the second permanent magnet part 512 has a suitable size in the first direction, which can both enable the moving magnetic block 52 to be accommodated in the accommodating space 504 formed by the permanent magnet part 51 so as to make full use of the magnetic force of the first permanent magnet part 511 and the second permanent magnet part 512, and save the space occupied by the permanent magnet part 51.

[0240] In some embodiments, the dimension of the moving magnetic block 52 in the direction of motion (e.g., the Z-direction) is smaller than the dimension of the permanent magnet 51 in the direction of motion. For example, the dimension of the moving magnetic block 52 in the direction of motion (e.g., the Z-direction) is less than or equal to half the dimension of the permanent magnet 51 in the direction of motion. Further, the dimension of the moving magnetic block 52 in the direction of motion (e.g., the Z-direction) can be greater than or equal to one-tenth the dimension of the permanent magnet 51 in the direction of motion, thereby ensuring that the moving magnetic block 52 possesses the required magnetic force.

[0241] The permanent magnet 51 has a large size in the direction of movement, which can keep the moving magnetic block 52 in the accommodating space 504 formed by the permanent magnet 51 during the movement, thereby covering the stroke of the moving magnetic block 52 and ensuring the levitation effect of the moving magnetic block 52.

[0242] As an example, see reference Figure 9 The dimension W4 of the fourth permanent magnet 521 in the direction of motion is smaller than the dimension W3 of the third permanent magnet 513 in the direction of motion. For example, W4 is less than or equal to 1 / 2 of W3. Further, W4 is greater than or equal to 1 / 10 of W3.

[0243] As an example, see reference Figure 9The dimension W5 of the fifth permanent magnet part 522 in the direction of movement is smaller than the dimension W1 of the first permanent magnet part 511 in the direction of movement, and smaller than the dimension W2 of the second permanent magnet part 512 in the direction of movement. For example, W5 is less than or equal to half of W1 and less than or equal to half of W2. Further, W5 can be greater than or equal to 1 / 10 of W1 and greater than or equal to 1 / 10 of W2.

[0244] In some embodiments, the dimension T3 of the third permanent magnet portion 513 in the second direction is less than or equal to the distance between the first permanent magnet portion 511 and the second permanent magnet portion 512 in the second direction. This can save permanent magnet volume and materials while meeting magnetic force requirements.

[0245] In some embodiments, the thickness of each permanent magnet portion in the permanent magnet component 51 and the moving magnet block 52 can be greater than or equal to a first threshold and less than or equal to a second threshold. For example, the first threshold can be 0.1 mm, and the second threshold can be 5 mm. For instance, the thickness of each permanent magnet portion can be greater than or equal to 0.5 mm and less than or equal to 1 mm. Using appropriate thicknesses for each permanent magnet portion (e.g., the first permanent magnet portion 511, the second permanent magnet portion 512, the third permanent magnet portion 513, the fourth permanent magnet portion 521, and the fifth permanent magnet portion 522) satisfies processing requirements while saving space as much as possible.

[0246] It should be noted that the thickness of the permanent magnet section mentioned above can be understood as the smallest parameter on the corresponding permanent magnet section. For example, the thickness of the first permanent magnet section 511 can be understood as dimension T1 in the second direction, the thickness of the second permanent magnet section 512 can be understood as dimension T2 in the second direction, the thickness of the third permanent magnet section 513 can be understood as dimension L3 in the first direction, the thickness of the fourth permanent magnet section 521 can be understood as dimension T4 in the second direction, and the thickness of the fifth permanent magnet section 522 can be understood as dimension T5 in the second direction.

[0247] It should also be noted that the size limitations of each permanent magnet in the above embodiments are merely exemplary, and other limitations may be imposed as needed in practical applications.

[0248] In some embodiments, each permanent magnet portion in the permanent magnet component 51 and the moving magnet block 52 may include at least one of the following permanent magnet materials: neodymium iron boron permanent magnet material, ferrite permanent magnet material, AlNiCo permanent magnet material, Samarium Cobalt permanent magnet material, or IronChromium Cobalt permanent magnet material.

[0249] In some embodiments, reference Figures 6 to 8As shown, the fixed magnet assembly 501 also includes a magnetic yoke 53, which is disposed on the surface of at least one of the first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 that is away from the receiving space 504. For example, the magnetic yoke 53 covers at least a portion of the surface of the permanent magnet 51 that is away from the moving magnet block 52. By providing the magnetic yoke 53, the magnetic field can be concentrated and guided, thereby enhancing the magnetic field lines in the receiving space 504 and reducing magnetic leakage.

[0250] In this application embodiment, the magnetic yoke 53 can be configured in various ways.

[0251] As an example, see reference Figure 6 The yoke 53 can be disposed at one end of the third permanent magnet portion 513 away from the fourth permanent magnet portion 521 in a first direction (such as the X direction). Furthermore, the yoke 53 can also extend in a second direction to cover the first permanent magnet portion 511 and / or the second permanent magnet portion 512.

[0252] As another example, see Figure 10 In (a), the yoke 53 may be disposed at one end of the first permanent magnet portion 511 and / or the second permanent magnet portion 512 away from the fifth permanent magnet portion 522 in a second direction (such as the Y direction). Furthermore, the yoke 53 may also extend in the first direction to cover the third permanent magnet portion 513.

[0253] As yet another example, see reference Figure 10 In (b), the magnetic yoke 53 may be disposed on the outer surfaces of the first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 (i.e., the surfaces other than the opening side of the receiving space 504). For example, the magnetic yoke 53 may be a semi-enclosed structure disposed around the first permanent magnet portion 511, the second permanent magnet portion 512, and the third permanent magnet portion 513 in the direction of motion around the actuator 42 (such as the optical axis direction). Exemplarily, the magnetic yoke 53 may be a U-shaped structure.

[0254] In some embodiments, the material of the magnetic yoke 53 is a soft magnetic material. Exemplarily, the magnetic yoke 53 may include at least one of the following materials: magnetically conductive stainless steel, permalloy, amorphous alloy materials, or microcrystalline alloy materials. For example, the grade of magnetically conductive stainless steel may be SUS410, SUS420, SUS430, Q285, etc. Permalloy is an iron-nickel alloy with very high permeability in weak magnetic fields. Amorphous alloy materials, also known as metallic glasses or amorphous metals, have high permeability and resistivity, low coercivity, are insensitive to stress, and do not exhibit magnetocrystalline anisotropy caused by crystal structure. Microcrystalline alloy materials are generally composed of crystalline phases smaller than about 50 nanometers and amorphous grain boundary phases, also known as nanocrystals, and have the characteristics of high permeability, low coercivity, low iron loss, high saturation magnetic induction, and good stability.

[0255] In some embodiments, the thickness of the yoke 53 can be greater than or equal to a third threshold and less than or equal to a fourth threshold. For example, the third threshold can be 0.01 mm and the fourth threshold can be 5 mm. For instance, the thickness of the yoke 53 can be greater than or equal to 0.02 mm and less than or equal to 0.5 mm. Using a suitable thickness for the yoke 53 satisfies processing requirements while saving space as much as possible.

[0256] It should be noted that the thickness of the magnetic yoke 53 mentioned above can be understood as the smallest parameter on the magnetic yoke 53.

[0257] In some embodiments, at least one of the first permanent magnet portion 511, the second permanent magnet portion 512, the third permanent magnet portion 513, the fourth permanent magnet portion 521, and the fifth permanent magnet portion 522 is a magnet or a permanent magnet thin film. Using a magnet as the permanent magnet portion in the permanent magnet component 51 or the moving magnetic block 52 is convenient for processing and has a lower cost. Using a permanent magnet thin film as the permanent magnet portion in the permanent magnet component 51 or the moving magnetic block 52 can save space. For example, the permanent magnet thin film in the permanent magnet component 51 can be coated, sputtered, or deposited on the first support member, and the permanent magnet thin film in the moving magnetic block 52 can be coated, sputtered, or deposited on the second support member.

[0258] In the embodiments of this application, magnets, permanent magnet films, etc., have the property of maintaining their magnetism for a long time.

[0259] In some embodiments, if the fixed magnet assembly 501 includes a yoke 53, the yoke 53 can serve as the aforementioned first support member. For example, the yoke 53 can be U-shaped, and the permanent magnet films included in the permanent magnet member 51 can cover the surface of the U-shaped yoke used to form the accommodating space.

[0260] For ease of understanding, Figure 11 A partial assembly schematic diagram of a voice coil motor provided in an embodiment of this application is shown. Figure 11 The voice coil motor shown includes Figures 6 to 10 The magnetic levitation component 5 described herein.

[0261] In some embodiments, reference Figure 11 The fixed magnet assembly 501 includes two permanent magnet groups 5a, which are symmetrically arranged on both sides of the carrier 3 in the second direction. Within each permanent magnet group 5a, two permanent magnet elements 51 are symmetrically arranged on both sides of the mover 42 in the first direction. Two moving magnetic blocks 52, corresponding to the two permanent magnet elements 51, are disposed between the two permanent magnet elements 51 and symmetrically arranged on both sides of the mover 42 in the first direction. Each permanent magnet element 51 and its corresponding moving magnetic block 52 repel or attract each other in the first direction and repel or attract each other in the second direction.

[0262] Accordingly, the drive assembly 4 may include two stators 41 and two movers 42, with each stator 41 and mover 42 corresponding to the other. The two stators 41 are symmetrically arranged on both sides of the carrier 3 in the second direction and connected to the housing, and the two movers 42 are symmetrically arranged on both sides of the carrier 3 in the second direction and connected to the carrier 3.

[0263] By setting at least two movers 42 and at least two permanent magnet groups 5a and corresponding moving magnet blocks 52, the smoothness of the voice coil motor's movement can be improved.

[0264] Figure 12 A partial structural schematic diagram of another magnetic levitation component provided in an embodiment of this application is shown. Figure 12 The magnetic levitation components shown are Figure 6 The magnetic levitation components shown are similar, but the structures of the permanent magnet 51 and the moving magnet 52 are different. The differences will be described in detail below, and the rest will be briefly explained.

[0265] like Figure 12 As shown, taking one of the permanent magnet components 51 as an example, the permanent magnet component 51 includes a second permanent magnet portion 512 and a third permanent magnet portion 513, which are arranged at an angle. For example, the second permanent magnet portion 512 and the third permanent magnet portion 513 form an "L"-shaped structure. The second permanent magnet portion 512 and the third permanent magnet portion 513 surround a receiving space 504, which has an opening facing the mover 42 and an opening away from the second permanent magnet portion 512.

[0266] The moving magnetic block 52 includes a fourth permanent magnet portion 521, a fifth permanent magnet portion 522, and a first magnetic portion 523 arranged along a first direction, which are connected to each other. The fourth permanent magnet portion 521 is positioned opposite to the third permanent magnet portion 513 in the first direction. That is, the fourth permanent magnet portion 521 is closer to the third permanent magnet portion 513 than the fifth permanent magnet portion 522 and the first magnetic portion 523. Both the fourth permanent magnet portion 521 and the fifth permanent magnet portion 522 comprise permanent magnet material. The first magnetic portion 523 comprises soft magnetic material; for example, the first magnetic portion 523 can be a soft magnetic block.

[0267] At least a portion of the moving magnetic block 52 is located within the receiving space 504 formed by the permanent magnet 51. As described above, the fourth permanent magnet portion 521 and the third permanent magnet portion 513 are disposed opposite each other in the first direction, the fifth permanent magnet portion 522 and the second permanent magnet portion 512 are disposed opposite each other in the second direction, and the first magnetic portion 523 and the second permanent magnet portion 512 are disposed opposite each other in the second direction. Specifically, the projection of the fourth permanent magnet portion 521 in the first direction (e.g., the X direction) overlaps with the projection of the third permanent magnet portion 513 in the first direction, the projection of the fifth permanent magnet portion 522 in the second direction (e.g., the Y direction) overlaps with the projection of the second permanent magnet portion 512 in the second direction, and the projection of the first magnetic portion 523 in the second direction overlaps with the projection of the second permanent magnet portion 512 in the second direction.

[0268] The magnetic pole direction of the fifth permanent magnet section 522 is opposite to that of the second permanent magnet section 512, and both are distributed along a second direction (such as the Y direction). That is, the two ends of the second permanent magnet section 512 and the fifth permanent magnet section 522 that are close to each other have the same magnetic pole. For example, Figure 12 The arrowed lines marking each permanent magnet section indicate the magnetic pole direction of the corresponding permanent magnet section. Taking the arrowed lines indicating a direction from the North Pole (N pole) to the South Pole (S pole) as an example, the end of the second permanent magnet section 512 closest to the fifth permanent magnet section 522 is the S pole, and the end of the fifth permanent magnet section 522 closest to the second permanent magnet section 512 is also the S pole. Alternatively, in other embodiments, both ends of the second permanent magnet section 512 and the fifth permanent magnet section 522 may be N poles, and this application is not limited to this. Accordingly, a repulsive force is generated between the fifth permanent magnet section 522 and the second permanent magnet section 512.

[0269] The magnetic pole direction of the fourth permanent magnet section 521 is opposite to that of the third permanent magnet section 513, and both are distributed along a first direction (such as the X direction). That is, the two ends of the third permanent magnet section 513 and the fourth permanent magnet section 521 that are close together have the same magnetic pole. Thus, the fourth permanent magnet section 521 and the third permanent magnet section 513 repel each other in the first direction. For example, the two ends of the third permanent magnet section 513 and the fourth permanent magnet section 521 that are close together may both be S poles, or both may be N poles. Correspondingly, a repulsive force is generated between the fourth permanent magnet section 521 and the third permanent magnet section 513.

[0270] The first magnetic part 523 and the second permanent magnet part 512 are disposed opposite each other in a second direction. Since the first magnetic part 523 includes a soft magnetic material and is located in the magnetic field of the second permanent magnet part 512, the first magnetic part 523 can be magnetized by the second permanent magnet part 512, and the end of the first magnetic part 523 near the second permanent magnet part 512 and the end of the second permanent magnet part 512 near the first magnetic part 523 form opposite magnetic poles. Accordingly, an attractive force is generated between the first magnetic part 523 and the second permanent magnet part 512.

[0271] Therefore, refer to Figure 13 For the levitation unit on the left, the fifth permanent magnet 522 is subjected to a repulsive force Fy2 along the second direction generated by the corresponding second permanent magnet 512, and the first magnetic part 523 is subjected to an attractive force Fy1 along the second direction generated by the corresponding second permanent magnet 512. The repulsive force Fy2 and the attractive force Fy1 are equal in magnitude but opposite in direction. Similarly, for the levitation unit on the right, the entire moving magnetic block 52 is also subjected to a repulsive force Fy4 and an attractive force Fy3 along the second direction, which are equal in magnitude but opposite in direction. Since both moving magnetic blocks 52 are connected to the mover 42, the structure consisting of the mover 42 and the two moving magnetic blocks 52 connected to the mover 42 can be levitated in the second direction.

[0272] Additionally, refer to Figure 13 For the levitation unit on the left, the fourth permanent magnet 521 is subjected to a repulsive force Fx1 along the first direction generated by the corresponding third permanent magnet 513. For the levitation unit on the right, the entire moving magnetic block 52 is also subjected to a repulsive force Fx2 along the first direction. The repulsive forces Fx1 and Fx2 are equal in magnitude and opposite in direction. Since both moving magnetic blocks 52 are connected to the mover 42, the structure consisting of the mover 42 and the two moving magnetic blocks 52 connected to the mover 42 can be levitated in the first direction.

[0273] based on Figure 12 The magnetic levitation component 5 shown can levitate the mover 42 at a specified height through the repulsive force between the magnetic poles and the magnetic attraction between the soft magnet and the permanent magnet. Compared to Figure 6 The structure shown, due to Figure 12 The first permanent magnet portion 511 is omitted from the permanent magnet component 51 shown, thus the mover 42 forms a single-sided magnetic levitation, which can reduce the structural size of the magnetic levitation assembly 5, which is beneficial for device miniaturization and reduces the complexity and manufacturing difficulty of the magnetic levitation assembly 5. Figure 12 When the magnetic levitation component 5 shown is applied to the camera module, it can achieve the purpose of levitation of the mover 42 even in extremely narrow spaces.

[0274] Understandable. Figure 12 The magnetic pole directions of the various permanent magnet sections shown are merely exemplary; in some other embodiments, Figure 12 The magnetic pole directions of each permanent magnet in the magnetic levitation assembly 5 shown can be completely reversed, or the magnetic pole directions of each permanent magnet in the left or right levitation unit can be completely reversed, which can also achieve the repulsive force between the permanent magnet 51 and the moving magnetic block 52.

[0275] In other embodiments, similar to Figure 8The third permanent magnet 513 and the fourth permanent magnet 521 can also interact with each other through an attractive force, thereby suspending the mover 42 in the first direction. Specifically, the magnetic pole directions of the third permanent magnet 513 and the fourth permanent magnet 521 are the same, and both are distributed along the first direction (such as the X direction). Thus, the third permanent magnet 513 and the fourth permanent magnet 521 are attracted to each other in the first direction.

[0276] In this application embodiment, there are multiple ways to arrange the fifth permanent magnet part 522 and the first magnetic part 523.

[0277] As an example, see reference Figure 12 The fifth permanent magnet part 522 is disposed between the fourth permanent magnet part 521 and the first magnetic part 523. The first magnetic part 523 is close to the mover 42 and connected to the mover 42.

[0278] As another example, see Figure 14 In (a), the first magnetic part 523 is disposed between the fourth permanent magnet part 521 and the fifth permanent magnet part 522. The fifth permanent magnet part 522 is close to the mover 42 and connected to the mover 42.

[0279] As yet another example, see reference Figure 14 In (b), the moving magnetic block 52 includes two fifth permanent magnet parts 522, which are disposed on both sides of the first magnetic part 523 in the first direction. That is, one of the two fifth permanent magnet parts 522 is located between the fourth permanent magnet part 521 and the first magnetic part 523, and the other of the two fifth permanent magnet parts 522 is located between the first magnetic part 523 and the mover 42.

[0280] As another example, see [reference] Figure 14 In (c), the moving magnetic block 52 includes two first magnetic parts 523, which are disposed on both sides of the fifth permanent magnet part 522 in the first direction. That is, one of the two first magnetic parts 523 is located between the fourth permanent magnet part 521 and the fifth permanent magnet part 522, and the other of the two first magnetic parts 523 is located between the fifth permanent magnet part 522 and the mover 42.

[0281] As another example, see [reference] Figure 14In (d), the moving magnetic block 52 includes a plurality of first magnetic parts 523 and a plurality of fifth permanent magnet parts 522. The plurality of first magnetic parts 523 and the plurality of fifth permanent magnet parts 522 are located between the fourth permanent magnet part 521 and the mover 42, and the plurality of first magnetic parts 523 and the plurality of fifth permanent magnet parts 522 are arranged alternately in the first direction. That is, at least one first magnetic part 523 has a fifth permanent magnet part 522 disposed on both sides in the first direction, and at least one fifth permanent magnet part 522 has a first magnetic part 523 disposed on both sides in the first direction.

[0282] based on Figure 12 or Figure 14 The structure shown allows the mover 42 to be stably suspended at a certain height via the left and right suspension units. Furthermore, based on... Figure 14 The structures shown in (b), (c) or (d) can achieve unilateral balance of the moving magnetic block 52 in the left or right suspension unit by adjusting the repulsive force between the fifth permanent magnet part 522 and the second permanent magnet part 512 and the attractive force between the first magnetic part 523 and the second permanent magnet part 512, which is beneficial to the stable suspension of the mover 42.

[0283] In some embodiments, when the mover 42 is in a stable levitated state, the distance between the moving magnetic block 52 and the second permanent magnet 512 in the second direction is related to the performance of the fifth permanent magnet 522, the size ratio of the fifth permanent magnet 522 in the first direction, the performance of the first magnetic part 523, and the size ratio of the first magnetic part 523 in the first direction. Accordingly, during the design phase, at least one of the performance of the fifth permanent magnet 522, the size ratio of the fifth permanent magnet 522 in the first direction, the performance of the first magnetic part 523, and the size ratio of the first magnetic part 523 in the first direction can be adjusted to balance the repulsive and attractive forces between the moving magnetic block 52 and the second permanent magnet 512 at a certain height, thereby suspending the moving magnetic block 52 at a position with a target distance from the second permanent magnet 512.

[0284] For example, the performance of the fifth permanent magnet 522 may include at least one of the following parameters: maximum magnetic energy product, magnetic saturation, magnetic field strength, etc.

[0285] For example, the size ratio of the fifth permanent magnet part 522 in the first direction may include: the ratio of the size of the fifth permanent magnet part 522 in the first direction to the size of the moving magnetic block 52 in the first direction and / or the ratio of the size of the fifth permanent magnet part 522 in the first direction to the size of the first magnetic part 523 in the first direction.

[0286] For example, the performance of the first magnetic part 523 may include at least one of the following parameters: coercivity, permeability, resistivity, magnetic induction intensity, etc.

[0287] For example, the size ratio of the first magnetic part 523 in the first direction may include: the ratio of the size of the first magnetic part 523 in the first direction to the size of the moving magnetic block 52 in the first direction and / or the ratio of the size of the first magnetic part 523 in the first direction to the size of the fifth permanent magnet part 522 in the first direction.

[0288] For example, once the size and material of the first magnetic part 523 are determined, the magnetic attraction between the first magnetic part 523 and the second permanent magnet part 512 at different distances is determined. The repulsive force between the fifth permanent magnet part 522 and the second permanent magnet part 512 can be adjusted by adjusting the performance of the fifth permanent magnet part 522 and / or the size ratio of the fifth permanent magnet part 522 in the first direction. In this way, the distance between the entire moving magnetic block 52 and the second permanent magnet part 512 in the levitated state can be adjusted.

[0289] based on Figure 12 The structure shown below will be further described in more detail below, including the specific arrangement of the permanent magnet 51 and the moving magnet 52. Because... Figure 12 The structure shown is Figure 6 The structures shown are similar; the following mainly describes the application of the permanent magnet 51 and the moving magnet 52. Figure 12 The differences between the structures shown will be described in detail. Provided the solutions are not contradictory, other details not described in detail can be found elsewhere. Figure 6 A description of the structure shown.

[0290] In some embodiments, the second permanent magnet portion 512 and the third permanent magnet portion 513 in the permanent magnet component 51 may be arranged in an "L" shape. For example, the permanent magnet component 51 may be L-shaped in a cross section perpendicular to the direction of movement. In practical applications, the third permanent magnet portion 513 and the second permanent magnet portion 512 may be the same type and model, or they may be different (e.g., different types and / or different models).

[0291] In some embodiments, the fourth permanent magnet portion 521, the fifth permanent magnet portion 522, and the first magnetic portion 523 in the moving magnetic block 52 can be arranged in a straight line. For example, the moving magnetic block 52 is arranged in a straight line in a cross section perpendicular to the direction of movement. In practical applications, the fourth permanent magnet portion 521 and the fifth permanent magnet portion 522 can be the same or different (e.g., different types and / or different models).

[0292] In some embodiments, reference Figure 15 The dimension L3 of the third permanent magnet portion 513 in the first direction is smaller than the dimension L2 of the second permanent magnet portion 512 in the first direction. For example, L3 is less than or equal to 1 / 2 of L2. Further, L3 may be greater than or equal to 1 / 10 of L2.

[0293] By limiting the size of the third permanent magnet 513 in the first direction, the space occupied by the third permanent magnet 513 can be reduced while meeting the levitation requirements.

[0294] In some embodiments, reference Figure 15 The dimension T3 of the third permanent magnet part 513 in the second direction may be the same as or different from the dimension T2 of the second permanent magnet part 512 in the second direction. The dimension W3 of the third permanent magnet part 513 in the motion direction may be the same as or different from the dimension W2 of the second permanent magnet part 512 in the motion direction.

[0295] In some embodiments, when the moving magnetic block 52 includes a plurality of fifth permanent magnet portions 522, the size, type, and model of the plurality of fifth permanent magnet portions 522 may all be the same. For example, the plurality of fifth permanent magnet portions 522 are symmetrically arranged on both sides of the first magnetic portion 523 in a first direction.

[0296] In some embodiments, reference Figure 15 The dimension L4 of the fourth permanent magnet 521 in the first direction is less than or equal to the dimension L5 of the fifth permanent magnet 522 in the first direction. For example, L4 is greater than or equal to 1 / 5 of L5. By limiting the dimension of the fourth permanent magnet 521 in the first direction, the space occupied by the fourth permanent magnet 521 can be reduced while meeting the levitation requirements, thereby providing more design adjustment space for the fifth permanent magnet 522 and the first magnetic part 523.

[0297] In practical applications, the fourth permanent magnet part 521 and the fifth permanent magnet part 522 may be the same or different in terms of size, type, and model.

[0298] In some embodiments, reference Figure 15 The dimension T6 of the first magnetic part 523 in the second direction can be the same as the dimension T5 of the fifth permanent magnet part 522 in the second direction (or the dimension T4 of the fourth permanent magnet part 521 in the second direction). The dimension W6 of the first magnetic part 523 in the motion direction can also be the same as the dimension W5 of the fifth permanent magnet part 522 in the motion direction (or the dimension W4 of the fourth permanent magnet part 521 in the motion direction). By limiting the dimensions of the first magnetic part 523 and the fifth permanent magnet part 522 in the second and motion directions, it is advantageous for the first magnetic part 523 and the fifth permanent magnet part 522 to be assembled as a single unit. However, it is understood that in practical applications, the dimensions of the first magnetic part 523 and the fifth permanent magnet part 522 in the second or motion direction can also be different.

[0299] In some embodiments, reference Figure 15The moving magnetic block 52 includes at least one first magnetic part 523 and at least one fifth permanent magnet part 522. The sum of the dimensions of the at least one first magnetic part 523 in the first direction is greater than or equal to the sum of the dimensions of the at least one fifth permanent magnet part 522 in the first direction. For example, taking the moving magnetic block 52 as having one first magnetic part 523 and one fifth permanent magnet part 522, the dimension L6 of the first magnetic part 523 in the first direction can be 1 to 20 times the dimension L5 of the fifth permanent magnet part 522 in the first direction.

[0300] When the fifth permanent magnet 522 approaches the second permanent magnet 512, the repulsive force between them increases sharply with the distance between them. Therefore, a large attractive force is required to achieve levitation. By limiting the size ratio of the first magnetic part 523 and the fifth permanent magnet 522 in the first direction, a large attractive force can be generated between the first magnetic part 523 and the second permanent magnet 512 to overcome the repulsive force, thereby achieving stable levitation of the mover at a small distance.

[0301] In some embodiments, the dimension L2 of the second permanent magnet portion 512 in the first direction is greater than the dimension of the moving magnetic block 52 in the first direction (i.e., the sum of the dimensions L4 of the fourth permanent magnet portion 521 in the first direction, the dimension L5 of the fifth permanent magnet portion 522 in the first direction, and the dimension L6 of the first magnetic portion 523 in the first direction). This allows the moving magnetic block 52 to be accommodated in the receiving space formed by the permanent magnet member 51, thereby fully utilizing the magnetic force between the fifth permanent magnet portion 522 and the first magnetic portion 523 and the second permanent magnet portion 512.

[0302] In some embodiments, the first magnetic part 523 includes at least one of the following soft magnetic materials: pure iron, magnetic steel, iron-silicon alloy materials, iron-aluminum alloy materials, iron-silicon-aluminum alloy materials, nickel-iron alloy materials, iron-cobalt alloy materials, soft magnetic ferrite, amorphous alloy materials, and microcrystalline alloy materials.

[0303] In some embodiments, reference Figures 12 to 14 The fixed magnet assembly 501 also includes a magnetic yoke 53, which is disposed on the surface of the second permanent magnet part 512 and / or the third permanent magnet part 513 away from the moving magnet block 52. By providing the magnetic yoke 53, the magnetic field can be concentrated and guided, reducing magnetic leakage.

[0304] In some embodiments, the soft magnetic material included in the yoke 53 and the first magnetic part 523 may be the same or different.

[0305] In the above embodiments, the first magnetic part 523 is a soft magnetic material, and the second permanent magnet part 512 can generate an attractive force between the second permanent magnet part 512 and the first magnetic part 523 by magnetizing the soft magnetic material. In other embodiments, refer to Figure 16The first magnetic part 523 may also include a permanent magnet material, such as a magnet, wherein the magnetic pole direction of the magnet is the same as that of the second permanent magnet part 512 and is distributed along a second direction (such as the Y direction). In this way, the two ends of the first magnetic part 523 and the second permanent magnet part 512 that are close to each other are opposite magnetic poles, and therefore the first magnetic part 523 and the second permanent magnet part 512 attract each other.

[0306] For ease of understanding, Figure 17 A partial assembly schematic diagram of a voice coil motor provided in an embodiment of this application is shown. Figure 17 The voice coil motor shown includes Figures 12 to 16 The magnetic levitation component 5 described herein.

[0307] In some embodiments, reference Figure 17 In (a) and (b), the fixed magnet assembly 501 includes two permanent magnet groups 5a, which are symmetrically arranged on both sides of the carrier 3 in the second direction. Within each permanent magnet group 5a, two permanent magnet elements 51 are symmetrically arranged on both sides of the mover 42 in the first direction. Two moving magnetic blocks 52 corresponding to the two permanent magnet elements 51 are disposed between the two permanent magnet elements 51 and are symmetrically arranged on both sides of the mover 42 in the first direction. Each permanent magnet element 51 and its corresponding moving magnetic block 52 repel or attract each other in the first direction, and there is a balanced repulsive force and attractive force in the second direction.

[0308] Accordingly, the drive assembly 4 may include two stators 41 and two movers 42, with each stator 41 and mover 42 corresponding to the other. The two stators 41 are symmetrically arranged on both sides of the carrier 3 in the second direction and connected to the housing, and the two movers 42 are symmetrically arranged on both sides of the carrier 3 in the second direction and connected to the carrier 3.

[0309] Figure 18 A schematic partial structural diagram of another magnetic levitation component provided in an embodiment of this application is shown. Figure 18 The magnetic levitation components shown are Figure 12 The magnetic levitation components shown are similar, but the structure of the moving magnetic block 52 is different. The differences will be described in detail below, and the rest will be briefly explained.

[0310] like Figure 18 As shown, the fixed magnet assembly 501 includes two permanent magnet groups 5a, which are symmetrically arranged on both sides of the carrier 3 in the second direction. Each permanent magnet group 5a includes two permanent magnet elements 51, and the moving magnet assembly 502 includes moving magnet blocks 52 that correspond one-to-one with each permanent magnet element 51. Each moving magnet block 52 is connected to the carrier 3 through a mover 42.

[0311] Taking one of the permanent magnet components 51 as an example, the permanent magnet component 51 includes a second permanent magnet portion 512 and a third permanent magnet portion 513, which are arranged at an angle. For example, the second permanent magnet portion 512 and the third permanent magnet portion 513 form an "L" shape. The moving magnetic block 52 includes a fourth permanent magnet portion 521 and a fifth permanent magnet portion 522 arranged along a first direction. The fourth permanent magnet portion 521 and the fifth permanent magnet portion 522 are connected, and the fifth permanent magnet portion 522 is located between the fourth permanent magnet portion 521 and the mover 42 and is connected to the mover 42.

[0312] The fourth permanent magnet section 521 and the third permanent magnet section 513 are arranged opposite to each other in a first direction (such as the X direction). The magnetic pole direction of the fourth permanent magnet section 521 is opposite to that of the third permanent magnet section 513 and both are distributed along the first direction, so that the fourth permanent magnet section 521 and the third permanent magnet section 513 repel each other in the first direction.

[0313] The fifth permanent magnet section 522 and the second permanent magnet section 512 are arranged opposite to each other in the second direction (such as the Y direction). The magnetic pole direction of the fifth permanent magnet section 522 is opposite to that of the second permanent magnet section 512 and both are distributed along the second direction, so that the fifth permanent magnet section 522 and the second permanent magnet section 512 repel each other in the second direction.

[0314] In the first direction, for any permanent magnet group 5a, the magnetic force generated by one permanent magnet 51 (such as the permanent magnet 51 on the left) on the corresponding moving magnetic block 52 is equal in magnitude and opposite in direction to the magnetic force generated by the other permanent magnet 51 (such as the permanent magnet 51 on the right) on the corresponding moving magnetic block 52. Therefore, the moving component consisting of the two moving magnetic blocks 52 and the mover 42 connected to the moving magnetic blocks 52 can be levitated in the first direction.

[0315] In the second direction, the magnetic force generated by the two permanent magnets 51 in one permanent magnet group 5a on the corresponding moving magnetic block 52 is equal in magnitude and opposite in direction to the magnetic force generated by the two permanent magnets 51 in the other permanent magnet group 5a on the corresponding moving magnetic block 52. Therefore, the carrier 3 and the moving parts consisting of the mover 42 and the moving magnetic block 52 connected to the carrier 3 can be levitated in the second direction.

[0316] In other words, Figure 6 or Figure 12 In the magnetic levitation assembly shown, the magnetic force between each permanent magnet group 5a and the corresponding moving magnetic block 52 can enable the moving part to levitate in the first and second directions. Figure 18In the magnetic levitation assembly shown, the magnetic force between each permanent magnet group 5a and the corresponding moving magnetic block 52 can enable the moving part to levitate in the first direction, but the magnetic force between the two opposing permanent magnet groups 5a and the corresponding moving magnetic block 52 is required to enable the moving part to levitate in the second direction.

[0317] Understandable. Figure 18 The magnetic pole directions of the various permanent magnet sections shown are merely exemplary; in some other embodiments, Figure 18 The magnetic pole directions of each permanent magnet in the magnetic levitation assembly 5 shown can be completely reversed, or the magnetic pole directions of each permanent magnet in at least one levitation unit can be completely reversed, which can also achieve the repulsive force between the permanent magnet 51 and the moving magnetic block 52.

[0318] In other embodiments, the magnetic pole direction of the fourth permanent magnet 521 is the same as that of the third permanent magnet 513 and both are distributed along the first direction, so that the fourth permanent magnet 521 and the third permanent magnet 513 are attracted to each other in the first direction. Similar to the above analysis, the moving part can be levitated in the first direction by the attraction between the magnetic poles.

[0319] In other embodiments, the magnetic pole direction of the fifth permanent magnet 522 is the same as that of the second permanent magnet 512 and both are distributed along the second direction, so that the fifth permanent magnet 522 and the second permanent magnet 512 are attracted to each other in the second direction. Similar to the above analysis, the moving part can be levitated in the second direction by the attraction between the magnetic poles.

[0320] It is understandable that, provided the solutions do not contradict each other, the above-mentioned... Figures 12 to 17 Other embodiments described are applicable Figure 18 The embodiments shown are for simplicity and will not be described in detail.

[0321] The above text combined Figures 6 to 18 Several methods for levitizing the mover 42 using the magnetic levitation component 5 are described in detail. In these methods, the magnetic force generated between the moving magnetic component 502 and the stationary magnetic component 501 includes a magnetic force in a first direction (e.g., the X direction) and a magnetic force in a second direction (e.g., the Y direction), wherein the first and second directions are perpendicular to each other and both perpendicular to the optical axis. The following section will combine... Figures 19 to 21 Another method for levitation of the actuator 42 by the magnetic levitation component 5 is described.

[0322] Figure 19 A partial structural schematic diagram of a voice coil motor provided in an embodiment of this application is shown.

[0323] like Figure 19As shown, the fixed magnet assembly 501 includes one or more permanent magnets 51, and the moving magnet assembly 502 includes moving magnet structures 54 corresponding to the permanent magnets 51. The permanent magnets 51 are connected to the housing 301, and the moving magnet structures 54 are connected to the mover 42 or the carrier 3. A third-direction magnetic force is generated between the permanent magnets 51 and their corresponding moving magnet structures 54 to maintain a gap between the permanent magnets 51 and their corresponding moving magnet structures 54 in the third-direction, wherein the third direction is perpendicular to the optical axis.

[0324] The moving magnet 42 can be suspended in a direction perpendicular to the optical axis by the magnetic force generated between the moving magnet component 502 and the fixed magnet component 501.

[0325] In some embodiments, the fixed magnet assembly 501 includes a plurality of permanent magnets 51, and the moving magnet assembly 502 includes a plurality of moving magnet structures 54, with each of the permanent magnets 51 corresponding to one of the moving magnet structures 54. The plurality of permanent magnets 51 and the plurality of moving magnet structures 54 are symmetrically distributed on both sides of the carrier 3 in a first direction and on both sides of a second direction, wherein the first and second directions are perpendicular to each other and both perpendicular to the optical axis. The levitation principle in this embodiment is similar to... Figure 18 The levitation principle of the structure shown can, for example, allow for... Figure 18 In the structure shown, any permanent magnet group 5a and the corresponding moving magnet block 52 in the relevant embodiments can be replaced with... Figure 19 The permanent magnet 51 and the moving magnet structure 54 are shown.

[0326] In other embodiments, this third direction intersects the optical axis. The magnetic force generated between the moving magnetic component 502 and the stationary magnetic component 501 intersects the optical axis, which is beneficial for precisely controlling the suspension position of moving parts such as the carrier 3.

[0327] In some embodiments, reference Figure 19 The fixed magnet assembly 501 includes multiple permanent magnets 51, which are evenly spaced circumferentially around the optical axis. Correspondingly, multiple moving magnetic structures 54, each corresponding to one of the permanent magnets 51, are evenly spaced circumferentially around the optical axis. The magnetic force between the multiple permanent magnets 51 and the multiple moving magnetic structures 54 enables the mover 42 to be stably suspended in a direction perpendicular to the optical axis.

[0328] In some embodiments, reference Figure 20The moving magnetic structure 54 may include a sixth permanent magnet part 541 and a second magnetic part 542. The magnetic force between the sixth permanent magnet part 541 and the permanent magnet 51 in the third direction is a repulsive force. The second magnetic part 542 may include a soft magnetic material or a permanent magnet material, so that the magnetic force between the second magnetic part 542 and the permanent magnet 51 in the third direction is an attractive force. In this way, the moving magnetic structure 54 and the corresponding permanent magnet 51 achieve a balance between repulsive and attractive forces in the third direction, thereby suspending the moving part 42 and the carrier 3 and other moving parts in the third direction.

[0329] In some embodiments, if the second magnetic part 542 includes a soft magnetic material, the moving magnetic structure 54 further includes a first winding 543, which is disposed on the third-direction side of the second magnetic part 542. The first winding 543 is used to pass current to change the distance between the permanent magnet 51 and the moving magnetic structure 54.

[0330] Specifically, when current is passed through the first winding 543, the second magnetic part 542 is magnetized under the electromagnetic field of the first winding 543. Correspondingly, the magnetic force between the second magnetic part 542 and the permanent magnet 51 changes. To maintain a balance between repulsive and attractive forces, the moving magnetic structure 54 moves in a third direction, for example, away from or closer to the permanent magnet 51, thereby changing the distance between the permanent magnet 51 and the moving magnetic structure 54. In other words, by adjusting the magnitude and / or direction of the current in the first winding 543, the performance of the second magnetic part 542 (such as magnetization intensity and / or magnetization direction) can be controlled, thereby adjusting and controlling the position of the mover 42 and the carrier 3 in a direction perpendicular to the optical axis.

[0331] In some embodiments, when the first winding 543 is not energized, and the mover 42 is in a stable levitated state at a certain position, the distance between the permanent magnet 51 and the moving magnetic structure 54 in the third direction is related to the performance of the sixth permanent magnet 541, the size ratio of the sixth permanent magnet 541 in the third direction, the performance of the second magnetic part 542, and the size ratio of the second magnetic part 542 in the third direction. Accordingly, during the design phase, at least one of the performance of the sixth permanent magnet 541, the size ratio of the sixth permanent magnet 541 in the third direction, the performance of the second magnetic part 542, and the size ratio of the second magnetic part 542 in the third direction can be adjusted to balance the repulsive and attractive forces between the permanent magnet 51 and the moving magnetic structure 54 at a certain position, thereby levitating the mover 42 in a suitable position.

[0332] For example, the performance of the sixth permanent magnet 541 may include at least one of the following parameters: maximum magnetic energy product, magnetic saturation, magnetic field strength, etc.

[0333] For example, the dimensional ratio of the sixth permanent magnet part 541 in the third direction may include: the ratio of the dimensional ratio of the sixth permanent magnet part 541 in the third direction to the dimensional ratio of the moving magnetic structure 54 in the third direction and / or the ratio of the dimensional ratio of the sixth permanent magnet part 541 in the third direction to the dimensional ratio of the second magnetic part 542 in the third direction.

[0334] For example, the performance of the second magnetic part 542 may include at least one of the following parameters: coercivity, permeability, resistivity, magnetic induction intensity, etc.

[0335] For example, the size ratio of the second magnetic part 542 in the third direction may include: the ratio of the size of the second magnetic part 542 in the third direction to the size of the moving magnetic structure 54 in the third direction and / or the ratio of the size of the second magnetic part 542 in the third direction to the size of the sixth permanent magnet part 541 in the third direction.

[0336] In some embodiments, the dimension of the first winding 543 in the third direction is smaller than the dimension of the second magnetic part 542 in the third direction, and / or the dimension of the first winding 543 in the fourth direction is smaller than the dimension of the second magnetic part 542 in the fourth direction, wherein the fourth direction is perpendicular to the third direction and perpendicular to the optical axis. Thus, when current is applied to the first winding 543, a portion of the second magnetic part 542 can be magnetized by the electromagnetic field of the first winding 543, which facilitates flexible adjustment of the attraction between the second magnetic part 542 and the permanent magnet 51.

[0337] For example, the size of the first winding 543 in the fourth direction is less than or equal to half the size of the second magnetic part 542 in the fourth direction and less than the size of the second magnetic part 542 in the fourth direction.

[0338] In other embodiments, the dimension of the first winding 543 in the fourth direction may also be greater than or equal to the dimension of the second magnetic portion 542 in the fourth direction. For example, the dimension of the first winding 543 in the fourth direction is greater than or equal to the dimension of the second magnetic portion 542 in the fourth direction and less than or equal to twice the dimension of the second magnetic portion 542 in the fourth direction. The first winding 543 having a larger dimension in the fourth direction than the second magnetic portion 542 facilitates the processing of the first winding 543.

[0339] In some embodiments, the dimension of the moving magnetic structure 54 in the fourth direction is less than or equal to the dimension of the permanent magnet 51 in the fourth direction, and the fourth direction is perpendicular to the third direction and perpendicular to the optical axis. This ensures that the entire moving magnetic structure 54 is located within the projection range of the permanent magnet 51 in the third direction, thereby ensuring the repulsive force between the permanent magnet 51 and the sixth permanent magnet portion 541 and the attractive force between the permanent magnet 51 and the second magnetic portion 542.

[0340] In some embodiments, the first winding 543 can be bonded to the second magnetic part 542, which facilitates assembly. Alternatively, the first winding 543 and the second magnetic part 542 can be kept at a certain distance, for example, a third support member is fixed to the second magnetic part 542, the first winding 543 is disposed on the third support member, and there is a gap between the first winding 543 and the second magnetic part 542.

[0341] In some embodiments, the first winding 543 is a ring structure, such as an elliptical ring, a square ring, a racetrack-shaped ring, etc.

[0342] In some embodiments, the shape of the first winding 543 in a cross section perpendicular to the third direction can be similar to the shape of the accommodating space enclosed by the first winding 543 in a cross section perpendicular to the direction of motion, for example, both are runway-shaped, both are elliptical, etc.

[0343] In some embodiments, the permanent magnet 51 or the sixth permanent magnet part 541 may be an integral structure (i.e., an indivisible whole before assembly), or a combination of multiple permanent magnets with the same magnetic pole direction, or a Halbach array magnet structure.

[0344] In some embodiments, the permanent magnet 51 or the sixth permanent magnet part 541 may include at least one of the following permanent magnet materials: neodymium iron boron permanent magnet material, ferrite permanent magnet material, AlNiCo permanent magnet material, Samarium Cobalt permanent magnet material, or IronChromium Cobalt permanent magnet material.

[0345] In some embodiments, the second magnetic part 542 may include at least one of the following soft magnetic materials: pure iron, magnetic steel, iron-silicon alloy materials, iron-aluminum alloy materials, iron-silicon-aluminum alloy materials, nickel-iron alloy materials, iron-cobalt alloy materials, soft magnetic ferrite, amorphous alloy materials, ultracrystalline alloy materials, etc.

[0346] In this application embodiment, the sixth permanent magnet part 541 can be configured in various ways.

[0347] As an example, the moving magnetic structure 54 includes two sixth permanent magnet portions 541, which are disposed on both sides of the second magnetic portion 542 in the fourth direction (perpendicular to the third direction). The magnetic poles of the two sixth permanent magnet portions 541 are in the same direction and are both distributed along the third direction. Exemplarily, the two sixth permanent magnet portions 541 are symmetrically arranged about the second magnetic portion 542. In this way, the repulsive force at both ends of the moving magnetic structure 54 and the torque at the center of the moving magnetic structure 54 are equal, preventing the moving magnetic structure 54 from tilting.

[0348] In some embodiments, the parameters (such as size, material, model, etc.) of the two sixth permanent magnet parts 541 are the same, so as to ensure that the repulsive force of the two sixth permanent magnet parts 541 on the permanent magnet part 51 is equal in magnitude, in the same direction, and equal in torque at a distance from the center of the moving magnet structure 54.

[0349] In other embodiments, the parameters of the two sixth permanent magnet parts 541 may be different, as long as the repulsive force between the two sixth permanent magnet parts 541 and the permanent magnet 51 is equal and the torque at the distance from the center of the moving magnetic structure 54 is equal.

[0350] In some embodiments, the dimension of the second magnetic portion 542 in the fourth direction is greater than or equal to the dimension of either of the two sixth permanent magnet portions 541 in the fourth direction. For example, the dimension of the second magnetic portion 542 in the fourth direction is less than or equal to 10 times the dimension of either of the sixth permanent magnet portions 541 in the fourth direction.

[0351] As another example, the moving magnetic structure 54 includes at least three sixth permanent magnet parts 541, which are disposed on the periphery of the second magnetic part 542 in a third direction.

[0352] As another example, the sixth permanent magnet 541 is ring-shaped and is arranged around the second magnetic part 542. In this way, the torque of the repulsive force on the moving magnetic structure 54 to the center of the moving magnetic structure 54 can be zero, thus preventing the moving magnetic structure 54 from tilting.

[0353] In this application embodiment, the first winding 543 can be configured in various ways.

[0354] As an example, see reference Figure 20 As shown, the first winding 543 is disposed on the surface of the second magnetic part 542 away from the permanent magnet 51 or on the surface of the second magnetic part 542 close to the permanent magnet 51, wherein the projection of the first winding 543 in a direction perpendicular to a third direction does not overlap with the projection of the second magnetic part 542 in the corresponding direction. For example, the first winding 543 is bonded to the corresponding surface of the second magnetic part 542.

[0355] As another example, see Figure 21As shown, the second magnetic part 542 may include a first body 5421 and a first protrusion 5422 extending from the first body 5421 in a third direction. For example, the first protrusion 5422 may protrude from the first body 5421 toward the permanent magnet 51 in a direction close to the permanent magnet 51, or the first protrusion 5422 may protrude from the first body 5421 away from the permanent magnet 51 in a direction away from the permanent magnet 51. A first winding 543 is sleeved on the first protrusion 5422. Thus, the first protrusion 5422 located in the middle of the first winding 543 can transmit a magnetic field, enhance the electromagnetic induction intensity, and help save power consumption.

[0356] In some embodiments, the dimension of the first protrusion 5422 in the third direction is greater than or equal to the dimension of the first winding 543 in the third direction. This facilitates the installation and winding of the first winding 543.

[0357] In some embodiments, the size of the first protrusion 5422 in the third direction is smaller than the size of the first body 5421 in the third direction. This smaller size of the first protrusion 5422 allows for fine-tuning of the local magnetization state of the second magnetic portion 542, preventing the permanent magnet 51 from significantly influencing the magnetization state of the second magnetic portion 542 due to the magnetization of the second magnetic portion 542 by the first protrusion 5422.

[0358] In some embodiments, the first protrusion 5422 and the first body 5421 may be integrally formed. Alternatively, the first protrusion 5422 and the first body 5421 may be separately manufactured and then fixed together.

[0359] In some embodiments, the material of the first protrusion 5422 may be the same as or different from the material of the first body 5421.

[0360] In some embodiments, the shape of the first protrusion 5422 in a cross section perpendicular to a third direction is rectangular, elliptical, circular, racetrack-shaped, etc.

[0361] In some embodiments, reference Figure 21 The fixed magnet assembly 501 may further include a yoke 55 disposed on the side of the permanent magnet 51 away from the moving magnet structure 54. For example, the yoke 55 covers at least a portion of the surface of the permanent magnet 51 facing away from the moving magnet structure 54.

[0362] In this embodiment, the magnetic yoke 55 includes a soft magnetic material, for example, the material of the magnetic yoke 55 may be the same as or different from the material of the second magnetic part 542.

[0363] In some embodiments, the permanent magnet 51 or the sixth permanent magnet portion 541 may be a magnet or a permanent magnet film.

[0364] The above mainly combines the appendix Figures 6 to 21The magnetic levitation component 5 is introduced below, and its application is discussed in the following sections. Figures 6 to 21 The driving component 4 in the structure shown is described in detail.

[0365] As described above, the drive assembly 4 includes a stator 41 and a mover 42, the mover 42 being movable relative to the stator 41.

[0366] In one implementation, the stator 41 can be a driving magnet, and the mover 42 can be a driving winding (or coil). That is, the driving magnet is relatively fixed, and the driving winding is connected to the moving magnet assembly 502 to levitate in the receiving space formed by the voice coil motor housing 301. In this method, the voice coil motor 300 is a moving-coil voice coil motor.

[0367] In another implementation, the stator 41 is the drive winding, and the mover 42 is the drive magnet. That is, the drive coil is relatively fixed, and the drive magnet is connected to the moving magnet assembly 502 to levitate in the receiving space formed by the voice coil motor housing 301. In this method, the voice coil motor 300 is a moving magnet voice coil motor.

[0368] The thickness and material of the driving magnet in the driving assembly 4 may be the same as or different from the thickness and material of the permanent magnet part or permanent magnet component in the magnetic levitation assembly 5. This application does not impose any particular limitation on this. Those skilled in the art can select the thickness and material of the driving magnet according to actual needs.

[0369] It should be noted that the thickness of the driving magnet mentioned above can be understood as the smallest parameter on the driving magnet. For example, the thickness of the driving magnet can be its dimension in a second direction (such as the Y direction).

[0370] In some embodiments, for Figures 6 to 18 In the illustrated embodiment, the minimum distance between the driving magnet in the driving component 4 and the levitation unit in the first direction (e.g., the X direction) is greater than or equal to a fifth threshold. For example, the fifth threshold can be greater than or equal to 0.1 mm, such as 1 mm. By limiting the distance between the driving magnet in the driving component 4 and the permanent magnet in the levitation unit, magnetic field interference between the driving component 4 and the levitation unit can be avoided, thereby ensuring the functional realization of both the driving component 4 and the magnetic levitation component 5.

[0371] It is understood that if the moving magnetic block 52 is completely housed in the receiving space 504, the minimum distance between the driving magnet in the driving assembly 4 and the levitation unit in the first direction can be the distance between the driving magnet and the first permanent magnet part 511 or the second permanent magnet part 512 in the first direction. If the moving magnetic block 52 is not completely housed in the receiving space 504, the minimum distance between the driving magnet in the driving assembly 4 and the levitation unit in the first direction can be the distance between the driving magnet and the fifth permanent magnet part 522 in the first direction.

[0372] In some embodiments, the voice coil motor 300 further includes a return assembly for returning the mover 42 to its initial position when the voice coil motor 300 is de-energized. For example, the return assembly may include a spring connecting the mover 42 and the base 1; when the voice coil motor 300 is de-energized, the mover 42 can return to its initial position under the elastic force of the spring. Alternatively, the return assembly may include a magnet connected to the mover 42 and a magnet connected to the base 1, the two magnets being arranged opposite each other in the direction of movement of the mover 42 and attracting each other; when the voice coil motor 300 is de-energized, the mover 42 can return to its initial position under the attraction between the two magnets.

[0373] In some embodiments, the voice coil motor 300 can be used for autofocusing of the lens, and correspondingly, the movement direction of the mover 42 is the optical axis direction.

[0374] In some embodiments, the voice coil motor 300 can be used for optical image stabilization of the lens, and correspondingly, the movement direction of the mover 42 is perpendicular to the optical axis.

[0375] It should be noted that, in the embodiments of this application, since the weight of each permanent magnet part in the moving magnetic block 52 or the moving magnetic structure 54 is small and much smaller than the attraction or repulsion between the permanent magnet parts, the influence of the gravity of each permanent magnet part in the moving magnetic block 52 or the moving magnetic structure 54 on the levitation state of the mover can be basically ignored.

[0376] In summary, combining Figures 6 to 21 The moving element 42 is levitated by the magnetic force (e.g., repulsive force and / or attractive force) between the fixed magnetic component 501 and the moving magnetic component 502. The levitation state can be maintained without consuming energy. Moreover, during the movement of the moving element 42, there is no contact or friction between the moving element 42 and the fixed component, thus greatly reducing the power consumption of the voice coil motor.

[0377] Figure 22 A schematic structural diagram of another voice coil motor provided in an embodiment of this application is shown. Figure 22 The voice coil motor 400 shown can be applied to Figure 2 In the camera module 200 shown, for example, the voice coil motor 400 can be Figure 2 A specific example of the AF motor 2031 or OIS motor 2032 shown.

[0378] refer to Figure 22 The voice coil motor 400 includes a base 1 and a cover (not shown in the figure, similar to...). Figure 5 The base 1 comprises a cover 2), a carrier 3, and a drive assembly 6. The cover and base 1 are fastened together to form a receiving space for accommodating the carrier 3 and the drive assembly 6. In this embodiment, the base 1 and the cover form the housing of a voice coil motor, similar to... Figure 5The housing 301 is located in the center. The carrier 3 is used to connect to at least a portion of the lens components. The drive assembly 6 includes a stator 61 and a mover 62. The stator 61 is connected to the motor housing (e.g., base 1), and the mover 62 is connected to the carrier 3. The mover 62 and the stator 61 are arranged opposite each other in the target direction (Z direction as shown in the figure). The mover 62 can move relative to the stator 61 in the target direction by magnetic force, so that the mover 62 can drive the carrier 3 to move.

[0379] For ease of understanding, we will use the direction of motion as the optical axis as an example below. However, it can be understood that the direction of motion can also be perpendicular to the optical axis.

[0380] refer to Figure 22 and Figure 23 The stator 61 includes a first permanent magnet 611. The mover 62 includes a second permanent magnet 621, a magnetic element 622, and a second winding 623. The second permanent magnet 621 is disposed opposite to the first permanent magnet 611 along the optical axis, and the magnetic poles of the second permanent magnet 621 are opposite to those of the first permanent magnet 611, both being distributed along the optical axis. Therefore, the magnetic force between the second permanent magnet 621 and the first permanent magnet 611 along the optical axis is a repulsive force. The magnetic element 622 is disposed opposite to the first permanent magnet 611 along the optical axis, and the magnetic element 622 includes a soft magnetic material; for example, the magnetic element 622 is a soft magnetic element. The magnetic element 622 can be magnetized in the magnetic field of the first permanent magnet 611, therefore, the magnetic force between the magnetic element 622 and the first permanent magnet 611 along the optical axis is an attractive force. The second winding 623 is disposed on the side of the magnetic element 622 closer to the first permanent magnet 611 or on the side of the magnetic element 622 farther from the first permanent magnet 611. The second winding 623 is used to pass current to change the magnetization state of the magnetic element 622, thereby changing the distance between the mover 62 and the stator 61 in the optical axis direction, and realizing the movement of the mover 62. For example, the second winding 623 is symmetrically distributed with respect to the center of the magnetic element 622.

[0381] In this embodiment, when no current is applied to the second winding 623, the magnetic force between the stator 61 and the mover 62 is used to suspend the mover 62 in a first position within the receiving space, wherein the mover 62 is a first distance away from the stator 61 along the optical axis in the first position. When current is applied to the second winding 623, the magnetic force between the stator 61 and the mover 62 is used to suspend the mover 62 in a second position within the receiving space, wherein the mover 62 is a second distance away from the stator 61 along the optical axis in the second position, and the second distance is different from the first distance.

[0382] Specifically, when no current is flowing through the second winding 623, the repulsive force between the second permanent magnet 621 and the first permanent magnet 611 is equal to the attractive force between the magnetic element 622 and the first permanent magnet 611. In this case, the mover 62 can stably levitate at a first position, a distance of a first distance from the stator 61 along the optical axis. When current is flowing through the second winding 623, the second winding 623 can change the magnetization state of the magnetic element 622 (e.g., magnetization intensity and / or magnetization direction), thereby changing the magnitude of the attractive force between the magnetic element 622 and the first permanent magnet 611. Correspondingly, when the mover 62 is in the first position, the repulsive force between the second permanent magnet 621 and the first permanent magnet 611 is no longer equal to the attractive force between the magnetic element 622 and the first permanent magnet 611. The mover 62 experiences an unbalanced force, and therefore, the mover 62 will be in an unstable levitating state. To achieve stable levitation, the mover 62 will move along the optical axis until it can be stably levitated at a second position, which is a second distance from the stator 61 along the optical axis. At the second position, the repulsive force between the second permanent magnet 621 and the first permanent magnet 611 is equal to the attractive force between the magnetic element 622 and the first permanent magnet 611.

[0383] For example, when a first current is applied to the second winding 623, the magnetic component 622 is magnetized under the electromagnetic field of the second winding 623. The part of the magnetic component 622 magnetized by the electromagnetic field has an attractive force with the first permanent magnet 611, and this attractive force is greater than the attractive force between this part and the first permanent magnet 611 when no current is applied. Therefore, for the entire magnetic component 622, the attractive force between the magnetic component 622 and the first permanent magnet 611 increases. Under the action of the attractive force, the mover 62 moves towards the first permanent magnet 611. As the distance between the second permanent magnet 621 and the first permanent magnet 611 decreases, the repulsive force between them increases. At a certain position, the repulsive force between the second permanent magnet 621 and the first permanent magnet 611 is equal to the attractive force between the magnetic component 622 and the first permanent magnet 611, and the mover will remain stably suspended at that position. By changing the magnitude of the first current, the intensity of magnetization of the magnetic component 622 by the electromagnetic field can be altered. The higher the magnetization intensity, the greater the attraction between the magnetized portion of the magnetic component 622 and the first permanent magnet 611. Consequently, when the mover 62 is stably suspended, the distance between the mover 62 and the stator 61 is smaller. Conversely, the opposite occurs.

[0384] For example, when a second current, opposite in direction to the first current, is passed through the second winding 623, the magnetic component 622 will be magnetized under the electromagnetic field of the second winding 623. The magnetized part of the magnetic component 622 will repel the first permanent magnet 611. This repulsive force will cancel out part of the attractive force between the magnetic component 622 and the first permanent magnet 611. Therefore, for the entire magnetic component 622, the attractive force between the magnetic component 622 and the first permanent magnet 611 will decrease. Under the action of the repulsive force between the second permanent magnet 621 and the first permanent magnet 611, the mover 62 will move away from the first permanent magnet 611. As the distance between the second permanent magnet 621 and the first permanent magnet 611 increases, the repulsive force between them decreases. At a certain position, the repulsive force between the second permanent magnet 621 and the first permanent magnet 611 is equal to the attractive force between the magnetic component 622 and the first permanent magnet 611, and the mover will remain stably suspended at that position. By changing the magnitude of the second current, the intensity of magnetization of the magnetic component 622 by the electromagnetic field can be altered. The higher the magnetization intensity, the greater the repulsive force between the magnetized portion of the magnetic component 622 and the first permanent magnet 611, resulting in a greater counteracting attractive force. Consequently, when the mover 62 is stably suspended, the distance between the mover 62 and the stator 61 is greater. Conversely, the opposite occurs.

[0385] Force analysis reference for the entire mover 62 Figure 24 The mover 62 is subjected to a repulsive force F1 and an attractive force F2 from the first permanent magnet 611, with F1 and F2 in opposite directions. When no current is flowing through the second winding 623, F1 and F2 are equal in magnitude, and the mover 62 can float stably in the first position. When current is flowing through the second winding 623, F1 and F2 may not be equal in magnitude, and the mover 62 is in an unstable floating state. Accordingly, the mover 62 will move along the optical axis until F1 and F2 are equal again, at which point the mover 62 floats stably in the second position. For example, when a first current is flowing through the second winding 623, F2 is greater than F1, and the mover 62 moves towards the first permanent magnet 611 until it floats stably. When a second current is flowing through the second winding 623, F1 is greater than F2, and the mover 62 moves away from the first permanent magnet 611 until it floats stably.

[0386] In other words, in this embodiment, by adjusting the magnitude and / or direction of the current in the second winding 623, the performance of the magnetic component 622 can be controlled, thereby achieving adjustment and control of the magnetic levitation height of the mover 62. In this embodiment, on one hand, the drive assembly 6 can be used to achieve levitation of the stator 61 and the mover 62 in the target direction, i.e., maintaining a gap between the stator 61 and the mover 62 in the target direction (e.g., the optical axis direction), and ensuring no contact between the stator 61 and the mover 62 in the target direction, thereby reducing wear between components and extending the service life of the voice coil motor. On the other hand, the drive assembly 6 can be used to convert changes in magnetic levitation height into driving force, enabling the voice coil motor mover 62 to levitate in the target direction (e.g., the optical axis direction, or a direction perpendicular to the optical axis), thereby achieving the automatic focusing and / or optical image stabilization functions of the voice coil motor.

[0387] In some embodiments, when the second winding 623 is not energized, and the mover 62 is in a stable suspended state at the first position, the distance between the mover 62 and the first permanent magnet 611 in the direction of motion (e.g., the Z direction) is related to the performance of the second permanent magnet 621, the size ratio of the second permanent magnet 621 in the first direction, the performance of the magnetic element 622, and the size ratio of the magnetic element 622 in the first direction. Accordingly, during the design phase, at least one of the performance of the second permanent magnet 621, the size ratio of the second permanent magnet 621 in the first direction, the performance of the magnetic element 622, and the size ratio of the magnetic element 622 in the first direction can be adjusted to balance the repulsive and attractive forces between the mover 62 and the first permanent magnet 611 at a certain height, thereby suspending the mover 62 at a first position with a target distance from the first permanent magnet 611.

[0388] For example, the performance of the second permanent magnet 621 may include at least one of the following parameters: maximum magnetic energy product, magnetic saturation, magnetic field strength, etc.

[0389] For example, the size ratio of the second permanent magnet 621 in the first direction may include: the ratio of the size of the second permanent magnet 621 in the first direction to the size of the mover 62 in the first direction and / or the ratio of the size of the second permanent magnet 621 in the first direction to the size of the magnetic element 622 in the first direction.

[0390] For example, the performance of the magnetic component 622 may include at least one of the following parameters: coercivity, permeability, resistivity, magnetic flux density, etc.

[0391] For example, the dimensional ratio of the magnetic element 622 in the first direction may include: the ratio of the dimension of the magnetic element 622 in the first direction to the dimension of the mover 62 in the first direction and / or the ratio of the dimension of the magnetic element 622 in the first direction to the dimension of the second permanent magnet 621 in the first direction.

[0392] In some embodiments, reference Figure 25 The dimension Q1 of the second winding 623 in the first direction (e.g., the X direction) is smaller than the dimension Q2 of the magnetic element 622 in the first direction, and / or the dimension P1 of the second winding 623 in the second direction (e.g., the Y direction) is smaller than the dimension P2 of the magnetic element 622 in the second direction. Thus, when current is passed through the second winding 623, a portion of the magnetic element 622 can be magnetized by the electromagnetic field of the second winding 623, which facilitates flexible adjustment of the attractive force between the magnetic element 622 and the first permanent magnet 611.

[0393] For example, P1 is greater than or equal to half of P2 and less than P2.

[0394] In other embodiments, the dimension P1 of the second winding 623 in the second direction (e.g., the Y direction) is greater than or equal to the dimension P2 of the magnetic element 622 in the second direction. For example, P1 is greater than or equal to P2 and less than or equal to twice P2. The second winding 623 has a larger dimension in the second direction than the magnetic element 622, which facilitates the processing of the second winding 623.

[0395] In some embodiments, the dimension of the mover 62 in the first direction (e.g., the X direction) is less than or equal to the dimension of the first permanent magnet 611 in the first direction, and / or the dimension of the mover 62 in the second direction (e.g., the Y direction) is less than or equal to the dimension of the first permanent magnet 611 in the second direction. This ensures that the entire mover 62 is located within the projection range of the first permanent magnet 611 in the direction of motion, thereby guaranteeing the repulsive force between the second permanent magnet 621 and the first permanent magnet 611, and the attractive force between the magnetic element 622 and the first permanent magnet 611.

[0396] In some embodiments, the second winding 623 can be bonded to the magnetic element 622, which facilitates assembly. Alternatively, the second winding 623 can be kept at a certain distance from the magnetic element 622, for example, the fourth support is fixed to the magnetic element 622, the second winding 623 is disposed on the fourth support, and there is a gap between the second winding 623 and the magnetic element 622.

[0397] In some embodiments, the second winding 623 is a ring structure, such as an elliptical ring, a square ring, a racetrack-shaped ring, etc.

[0398] In some embodiments, the shape of the magnetic element 622 in a cross section perpendicular to the direction of motion (such as the Z direction) can be similar to the shape of the accommodating space enclosed by the second winding 623 in a cross section perpendicular to the direction of motion, for example, both are runway-shaped, both are elliptical, etc.

[0399] In some embodiments, the first permanent magnet 611 or the second permanent magnet 621 may be an integral structure (i.e., an indivisible whole before assembly), or a combination of multiple permanent magnets with the same magnetic pole direction, or a Halbach array magnet structure.

[0400] In some embodiments, the first permanent magnet 611 or the second permanent magnet 621 may include at least one of the following permanent magnet materials: neodymium iron boron permanent magnet material, ferrite permanent magnet material, AlNiCo permanent magnet material, Samarium Cobalt permanent magnet material, or IronChromium Cobalt permanent magnet material.

[0401] In some embodiments, the magnetic component 622 may include at least one of the following soft magnetic materials: pure iron, magnetic steel, iron-silicon alloy materials, iron-aluminum alloy materials, iron-silicon-aluminum alloy materials, nickel-iron alloy materials, iron-cobalt alloy materials, soft magnetic ferrite, amorphous alloy materials, ultracrystalline alloy materials, etc.

[0402] In this application embodiment, the second permanent magnet 621 can be configured in various ways.

[0403] As an example, see reference Figure 26 As shown in (a), the mover 62 includes two second permanent magnets 621, which are disposed on both sides of the magnetic element 622 in a first direction (e.g., the X direction). The magnetic poles of the two second permanent magnets 621 are in the same direction and are distributed along the direction of motion. For example, the two second permanent magnets 621 are symmetrically arranged about the magnetic element 622. In this way, the repulsive force at both ends of the mover 62 and the torque to the center of the mover 62 are equal, which allows the mover 62 to translate only along the direction of motion (e.g., the Z direction) and prevents the mover 62 from tilting.

[0404] In some embodiments, the parameters (such as size, material, model, etc.) of the two second permanent magnets 621 are the same, so as to ensure that the two second permanent magnets 621 are subjected to the same magnitude and direction of the repulsive force from the first permanent magnet 611, and the torques at the distance from the center of the mover 62 are equal.

[0405] For example, the two second permanent magnet components 621 have the same dimensions in the first direction, the second direction, and the direction of movement. Furthermore, the two second permanent magnet components 621 have the same material type and model.

[0406] In other embodiments, the parameters of the two second permanent magnets 621 may be different, as long as the repulsive force between the two second permanent magnets 621 and the first permanent magnet 611 is equal and the torque at the distance from the center of the mover 62 is equal.

[0407] In some embodiments, the dimension of the magnetic element 622 in a first direction (such as the X direction) is greater than or equal to the dimension of either of the two second permanent magnets 621 in the first direction. For example, the dimension of the magnetic element 622 in the first direction is less than or equal to 10 times the dimension of either of the second permanent magnets 621 in the first direction.

[0408] As another example, the mover 62 includes at least three second permanent magnets 621 disposed around the magnetic element 622 about the direction of motion.

[0409] As another example, see [reference] Figure 26 As shown in (b), the second permanent magnet 621 is annular and is arranged around the magnetic element 622. In this way, the torque from the repulsive force on the mover 62 to the center of the mover 62 can be zero, so that the mover 62 only performs translational motion along the direction of motion and avoids the mover 62 from tilting.

[0410] In this application embodiment, there are multiple ways to configure the second winding 623.

[0411] As an example, see reference Figure 23 As shown, the second winding 623 is disposed on the surface of the magnetic element 622 away from the first permanent magnet 611 or on the surface of the magnetic element 622 close to the first permanent magnet 611, wherein the projection of the second winding 623 in the first direction or the second direction does not overlap with the projection of the magnetic element 622 in the corresponding direction. For example, the second winding 623 is bonded to the surface of the magnetic element 622 perpendicular to the direction of movement.

[0412] As another example, see Figure 27 As shown, the magnetic component 622 may include a second body 6221 and a second protrusion 6222 extending from the second body 6221 along the direction of movement. For example, the second protrusion 6222 may protrude from the second body 6221 toward the first permanent magnet 611 in a direction close to the first permanent magnet 611, or the second protrusion 6222 may protrude from the second body 6221 away from the first permanent magnet 611 in a direction away from the first permanent magnet 611. The second winding 623 is sleeved on the second protrusion 6222. Thus, the second protrusion 6222, located in the middle of the second winding 623, can transmit a magnetic field, enhance the electromagnetic induction intensity, and help save power consumption.

[0413] In some embodiments, reference Figure 27 The dimension S1 of the second protrusion 6222 in the direction of motion (such as the Z direction) is greater than or equal to the dimension S2 of the second winding 623 in the direction of motion. This facilitates the installation and winding of the second winding 623.

[0414] In some embodiments, the dimension S1 of the second protrusion 6222 in the direction of motion (e.g., the Z direction) is smaller than the dimension S3 of the second body 6221 in the direction of motion. This smaller size of the second protrusion 6222 allows for fine-tuning of the local magnetization state of the magnetic component 622, preventing the magnetization state of the magnetic component 622 by the first permanent magnet 611 from being significantly affected by the magnetization of the magnetic component 622 by the second protrusion 6222.

[0415] In some embodiments, the second protrusion 6222 and the second body 6221 can be integrally formed. Alternatively, the second protrusion 6222 and the second body 6221 can be separately manufactured and then fixed together.

[0416] In some embodiments, the material of the second protrusion 6222 may be the same as or different from the material of the second body 6221.

[0417] In some embodiments, the shape of the second protrusion 6222 in a cross section perpendicular to the direction of motion is rectangular, elliptical, circular, racetrack-shaped, etc.

[0418] Figure 28 A schematic structural diagram of another driving component 6 provided in an embodiment of this application is shown. Figure 23 The difference in the drive assembly 6 shown is that the stator 61 may also include a yoke 612 disposed on the side of the first permanent magnet 611 away from the mover 62. For example, the yoke 612 covers at least a portion of the surface of the first permanent magnet 611 away from the mover 62.

[0419] In this embodiment, the magnetic yoke 612 includes a soft magnetic material, for example, the material of the magnetic yoke 612 may be the same as or different from the material of the magnetic component 622.

[0420] In some embodiments, at least one permanent magnet in the drive assembly 6 (e.g., the first permanent magnet 611, the second permanent magnet 621, etc.) can be a magnet or a permanent magnet thin film. For example, the permanent magnet thin film in the stator 61 can be coated, sputtered, or deposited on the yoke 612, and the permanent magnet thin film in the mover 62 can be coated, sputtered, or deposited on the fifth support. The thickness of the permanent magnet thin film can be made very small, which can save space while meeting process requirements.

[0421] In some embodiments, the voice coil motor 400 may further include a magnetic levitation component, which may employ the aforementioned method. Figures 6 to 21 The magnetic levitation component 5 described herein includes a moving magnetic component 502 that can be connected to the carrier 3, and a fixed magnetic component 501 that is connected to the housing 301.

[0422] In this embodiment of the application, the direction of motion of the mover 62 is the target direction, and correspondingly, the above-mentioned Figures 22 to 28The embodiments described herein are illustrated using the optical axis as the target direction. In other embodiments, the target direction may be perpendicular to the optical axis, such as the X or Y direction. In other words, the voice coil motor 400 described in the above embodiments can also be used to achieve optical image stabilization of the lens.

[0423] For example, return to reference Figure 22 The voice coil motor 400 may further include a drive assembly 7 for driving the lens barrel OIS. For distinction, the drive assembly 6 is referred to as the first drive assembly, and the drive assembly 7 as the second drive assembly. The structure of the second drive assembly 7 is similar to that of the first drive assembly 6. The second drive assembly 7 includes a stator 71 and a mover 72. The structure of the stator 71 is similar to that of the stator 61, and the structure of the mover 72 is similar to that of the mover 62. The difference is that the mover 72 and the stator 71 in the second drive assembly 7 are arranged opposite to each other in a direction perpendicular to the optical axis. The mover 72 can move relative to the stator 71 by magnetic force, thus driving the carrier 3 to move in a direction perpendicular to the optical axis. For details, please refer to the relevant description of the first drive assembly 6; for brevity, it will not be repeated here.

[0424] Alternatively, it can be understood that the second drive component 7 is similar to Figure 20 The magnetic levitation assembly shown includes a first winding 543, where the stator 71 corresponds to the permanent magnet 51 and the mover 72 corresponds to the moving magnet structure 54. For a more detailed description, please refer to [link to relevant documentation]. Figure 20 Related descriptions.

[0425] In some embodiments, reference Figure 29 The voice coil motor 400 includes at least two first drive components 6, which are arranged around the optical axis on the periphery of the carrier 3. For example, the voice coil motor 400 includes two first drive components 6, which are arranged symmetrically about the center of the carrier 3.

[0426] In some embodiments, reference Figure 29 The voice coil motor 400 includes at least two second drive components 7, which are arranged around the optical axis on the periphery of the carrier 3. For example, the at least two second drive components 7 are evenly arranged around the periphery of the carrier 3.

[0427] For example, the voice coil motor 400 includes two second drive components 7, which are at a 90° angle with respect to the center of the carrier 3. For instance, one of the two second drive components 7 is used to drive the carrier 3 to move in the X direction, and the other second drive component 7 is used to drive the carrier 3 to move in the Y direction.

[0428] For example, the voice coil motor 400 includes four second drive components 7, with adjacent second drive components 7 forming a 90° angle about the center of the carrier 3. For instance, two of the four second drive components 7 are symmetrically distributed along the X direction to drive the carrier 3 to move along the X direction, and the other two drive components 7 are symmetrically distributed along the Y direction to drive the carrier 3 to move along the Y direction. Alternatively, the four second drive components 7 may be symmetrical about both the X and Y directions; correspondingly, the combined motion direction of the second drive components 7 in operation is the X and / or Y directions. That is, the motion direction of each individual second drive component 7 is not necessarily along the X or Y direction, but the combined motion direction of multiple second drive components 7 is along either the X or Y direction.

[0429] In some embodiments, the voice coil motor 400 includes two second drive components 7 symmetrically arranged in a fifth direction, which is perpendicular to the optical axis and passes through the center of the optical axis. That is, the two second drive components 7 are symmetrically distributed about the center of the optical axis. In each of the two second drive components 7, the mover 72 may not include a second permanent magnet. That is, the mover 72 includes a magnetic element and a second winding, and the stator 71 includes a first permanent magnet. When the second drive component is not energized, an attractive force is generated between the magnetic element and the first permanent magnet. The attractive forces on the movers 72 in the two second drive components 7 are in opposite directions, thus keeping the carrier 3 connected to the two movers 72 stable. When current is applied to the windings in the two movers 72, by changing the magnitude and / or direction of the current, the magnitude and / or direction of the magnetic force between the magnetic element and the first permanent magnet in each second drive component 7 can be changed, thereby changing the distance between the mover 72 and the stator 71 in each second drive component 7, and thus causing the carrier 3 to move in the fifth direction.

[0430] For example, when current A is applied to one of the windings, the attraction between the magnetic element and the first permanent magnet in the corresponding second drive assembly 7 is strengthened, and the distance between the mover 72 and the stator 71 in the second drive assembly 7 is reduced. When current B is applied to the other winding, the attraction between the magnetic element and the first permanent magnet in the corresponding second drive assembly 7 is reduced, and the distance between the mover 72 and the stator 71 in the second drive assembly 7 is increased. Therefore, under the combined force of the two movers 72, the carrier 3 will move in the direction of the winding with current A.

[0431] In summary, combining Figures 22 to 29A control winding (i.e., the second winding) is introduced on the mover side 62. When there is no current input to the control winding, the mover is levitated by the repulsive and attractive forces between the stator and the mover, maintaining the levitation state without consuming energy. When current is applied to the control winding, the magnetization state of the magnetic components can be changed by adjusting the magnitude and / or direction of the current, thereby adjusting the distance between the mover and the stator and thus adjusting the levitation height of the mover. The change in the levitation height of the mover is converted into driving force, enabling the voice coil motor to achieve autofocus or optical image stabilization. Furthermore, during the movement of the mover, there is no contact or friction between the mover and the stationary components, thus greatly reducing the power consumption of the voice coil motor.

[0432] It is understood that the various magnetic levitation structures described in this application can be partially or fully combined and applied to voice coil motors. For example... Figure 22 The drive component 6 shown can be used with Figures 6 to 18 The magnetic levitation component 5 described herein is used in conjunction with the same voice coil motor, and will not be described in detail here.

[0433] This application also provides an electronic device 800. Figure 30 This is a control principle diagram of the electronic device 800 provided in this application.

[0434] like Figure 30 As shown, the electronic device 800 includes a camera module 810 and a processing unit 820. The camera module 810 includes a lens 811 and a voice coil motor 812. The processing unit 820 is used to control the voice coil motor 812 to achieve autofocus and / or optical image stabilization of the lens 811. In this embodiment, the voice coil motor 812 can be the voice coil motor 300 or the voice coil motor 400 described in the foregoing embodiments.

[0435] In some embodiments, the processing unit 820 can control the voice coil motor 812 via a driver chip. Specifically, the processing unit 820 can send focus information and / or image stabilization information to the driver chip, which controls the drive current of the voice coil motor 812 according to the focus information and / or image stabilization information, so that the voice coil motor 812 drives the lens 811 to move. For example, when the voice coil motor 812 is the aforementioned voice coil motor 300, the driver chip can control the magnitude and direction of the current in the drive coil in the drive assembly 4. As another example, when the voice coil motor 812 is the aforementioned voice coil motor 400, the driver chip can control the magnitude and direction of the current in the windings of the drive assembly 6.

[0436] In some embodiments, the electronic device 800 may further include a gyroscope 830, which is used to collect jitter information of the electronic device 800 and send the jitter information to the processing unit 820.

[0437] This application also provides an electronic device, which includes an image processing chip and the camera module in the foregoing embodiments. The image processing chip is used to process the images acquired by the camera module.

[0438] It should be noted that, in the embodiments of this application, "fixed component" refers to a component that does not undergo relative movement, specifically a component that is relatively fixed in the voice coil motor, and "moving component" refers to a component that undergoes relative movement during the operation of the voice coil motor.

[0439] It should also be noted that the moving parts (such as moving part 42, moving part 62 or moving part 72, etc.), moving magnet assembly 502 and carrier 3 involved in the embodiments of this application are all moving parts in the voice coil motor. Therefore, the description of the suspension or movement of one of the moving parts in the whole description can be applied to other moving parts.

[0440] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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.

[0441] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A voice coil motor (300), characterized in that, include: The shell (301) has a receiving space; A carrier (3) is housed in the receiving space, the carrier (3) being used to connect to at least a portion of the lens components; The drive assembly (4) includes a stator (41) and a mover (42). The stator (41) is connected to the housing (301), and the mover (42) is connected to the carrier (3). The mover (42) can move relative to the stator (41) along the optical axis. The magnetic levitation component (5) includes a moving magnetic component (502) and a fixed magnetic component (501). The fixed magnetic component (501) is connected to the housing (301). The moving magnetic component (502) is correspondingly arranged with the fixed magnetic component (501). The moving magnetic component (502) is connected to the mover (42) or the carrier (3). The moving magnetic component (502) and the fixed magnetic component (501) generate a magnetic force perpendicular to the optical axis. The magnetic forces are balanced in a plane perpendicular to the optical axis to maintain the gap between the moving magnetic component (502) and the fixed magnetic component (501).

2. The voice coil motor (300) according to claim 1, characterized in that, The magnetic force includes a magnetic force in a first direction and a magnetic force in a second direction. The magnetic force in the first direction is used to maintain the gap between the moving magnetic component (502) and the fixed magnetic component (501) in the first direction. The magnetic force in the second direction is used to maintain the gap between the moving magnetic component (502) and the fixed magnetic component (501) in the second direction. The first direction and the second direction are both perpendicular to the optical axis direction, and the first direction and the second direction are perpendicular to each other.

3. The voice coil motor (300) according to claim 2, characterized in that, The fixed magnet assembly (501) includes at least one permanent magnet group (5a), the permanent magnet group (5a) includes two permanent magnet elements (51), the moving magnet assembly (502) includes moving magnet blocks (52) that are arranged one-to-one with the permanent magnet elements (51), and the two permanent magnet elements (51) in the permanent magnet group (5a) are respectively arranged at both ends of the two moving magnet blocks (52) corresponding to them in the first direction; In the permanent magnet group (5a), the magnetic force of either of the two permanent magnets (51) and the corresponding moving magnetic block (52) in the first direction is a repulsive force, or the magnetic force of either of the two permanent magnets (51) and the corresponding moving magnetic block (52) in the first direction is an attractive force.

4. The voice coil motor (300) according to claim 3, characterized in that, The two moving magnetic blocks (52) are respectively connected to the two ends of the moving element (42) in the first direction.

5. The voice coil motor (300) according to claim 3 or 4, characterized in that, The fixed magnet assembly (501) includes two permanent magnet groups (5a), which are symmetrically arranged on both sides of the carrier (3) in the second direction.

6. The voice coil motor (300) according to any one of claims 3 to 5, characterized in that, The permanent magnet component (51) includes a first permanent magnet part (511), a second permanent magnet part (512), and a third permanent magnet part (513). The first permanent magnet part (511) and the second permanent magnet part (512) are disposed opposite to each other in the second direction. The third permanent magnet part (513) is located between the first permanent magnet part (511) and the second permanent magnet part (512). The first permanent magnet part (511), the second permanent magnet part (512), and the third permanent magnet part (513) form a U-shaped structure. At least a portion of the moving magnetic block (52) is located within the U-shaped structure. The moving magnetic block (52) includes a fourth permanent magnet part (521) and a fifth permanent magnet part (522). The fifth permanent magnet part (522) is located between the fourth permanent magnet part (521) and the mover (42) in the first direction. The fourth permanent magnet part (521) and the third permanent magnet part (513) are arranged opposite to each other in the first direction. The magnetic pole direction of the third permanent magnet part (513) and the magnetic pole direction of the fourth permanent magnet part (521) are both distributed along the first direction, so that the fourth permanent magnet part (521) and the third permanent magnet part (513) repel or attract each other in the first direction. The fifth permanent magnet part (522) is located between the first permanent magnet part (511) and the second permanent magnet part (512) in the second direction. The magnetic pole direction of the first permanent magnet part (511), the magnetic pole direction of the second permanent magnet part (512) and the magnetic pole direction of the fifth permanent magnet part (522) are all distributed along the second direction. The magnetic pole direction of the first permanent magnet part (511) is the same as that of the second permanent magnet part (512), and the magnetic pole direction of the fifth permanent magnet part (522) is opposite to that of the first permanent magnet part (511). Alternatively, the magnetic pole directions of the first permanent magnet part (511), the second permanent magnet part (512), and the fifth permanent magnet part (522) are all the same.

7. The voice coil motor (300) according to claim 6, characterized in that, The first permanent magnet part (511) and the second permanent magnet part (512) have the same size, and the projected overlap area of ​​the first permanent magnet part (511) and the fifth permanent magnet part (522) in the second direction is equal to the projected overlap area of ​​the second permanent magnet part (512) and the fifth permanent magnet part (522) in the second direction.

8. The voice coil motor (300) according to claim 5, characterized in that, The permanent magnet component (51) includes a second permanent magnet part (512) and a third permanent magnet part (513), wherein the second permanent magnet part (512) and the third permanent magnet part (513) are arranged at an angle and form an L-shaped structure; The moving magnetic block (52) includes a fourth permanent magnet part (521) and a fifth permanent magnet part (522) arranged along the first direction, and the fifth permanent magnet part (522) is connected to the moving part (42); The fourth permanent magnet part (521) and the third permanent magnet part (513) are arranged opposite to each other in the first direction. The magnetic pole direction of the third permanent magnet part (513) and the magnetic pole direction of the fourth permanent magnet part (521) are both distributed along the first direction, so that the fourth permanent magnet part (521) and the third permanent magnet part (513) repel or attract each other in the first direction. The fifth permanent magnet part (522) and the second permanent magnet part (512) are arranged opposite to each other in the second direction. The magnetic pole direction of the second permanent magnet part (512) and the magnetic pole direction of the fifth permanent magnet part (522) are both distributed along the second direction, so that the second permanent magnet part (512) and the fifth permanent magnet part (522) repel or attract each other in the second direction.

9. The voice coil motor (300) according to any one of claims 3 to 5, characterized in that, The permanent magnet component (51) includes a second permanent magnet part (512) and a third permanent magnet part (513), wherein the second permanent magnet part (512) and the third permanent magnet part (513) are arranged at an angle and form an L-shaped structure; The moving magnetic block (52) includes a fourth permanent magnet part (521), a fifth permanent magnet part (522), and a first magnetic part (523) arranged along the first direction; The fourth permanent magnet part (521) and the third permanent magnet part (513) are arranged opposite to each other in the first direction. The magnetic pole direction of the third permanent magnet part (513) and the magnetic pole direction of the fourth permanent magnet part (521) are both distributed along the first direction, so that the fourth permanent magnet part (521) and the third permanent magnet part (513) repel or attract each other in the first direction. The fifth permanent magnet part (522) and the second permanent magnet part (512) are arranged opposite to each other in the second direction. The magnetic pole direction of the second permanent magnet part (512) and the magnetic pole direction of the fifth permanent magnet part (522) are both distributed along the second direction. The magnetic pole direction of the second permanent magnet part (512) is opposite to the magnetic pole direction of the fifth permanent magnet part (522). The first magnetic part (523) and the second permanent magnet part (512) are disposed opposite to each other in the second direction, and the second permanent magnet part (512) and the first magnetic part (523) attract each other. The first magnetic part (523) includes a soft magnetic material, or the first magnetic part (523) includes a permanent magnet material and the magnetic pole direction of the first magnetic part (523) is the same as the magnetic pole direction of the second permanent magnet part (512).

10. The voice coil motor (300) according to claim 9, characterized in that, The moving magnetic block (52) includes at least one fifth permanent magnet part (522) and at least one first magnetic part (523), wherein at least one fifth permanent magnet part (522) and at least one first magnetic part (523) are alternately arranged between the fourth permanent magnet part (521) and the mover (42).

11. The voice coil motor (300) according to any one of claims 6 to 10, characterized in that, The second permanent magnet part (512) has a larger dimension in the first direction than the moving magnet block (52) has a larger dimension in the first direction.

12. The voice coil motor (300) according to any one of claims 6 to 11, characterized in that, The fourth permanent magnet part (521) is smaller in size in the first direction than the fifth permanent magnet part (522) in the first direction.

13. The voice coil motor (300) according to any one of claims 3 to 12, characterized in that, The size of the moving magnetic block (52) in the optical axis direction is smaller than the size of the permanent magnet (51) in the optical axis direction.

14. The voice coil motor (300) according to any one of claims 3 to 13, characterized in that, The fixed magnet assembly (501) further includes a yoke (53) that covers at least a portion of the surface of the permanent magnet (51) facing away from the moving magnet (52).

15. The voice coil motor (300) according to claim 1, characterized in that, The fixed magnet assembly (501) includes one or more permanent magnets (51), and the moving magnet assembly (502) includes moving magnet structures (54) that are arranged one-to-one with the permanent magnets (51). A third-direction magnetic force is generated between the permanent magnets (51) and the corresponding moving magnet structures (54) to maintain the gap between the permanent magnets (51) and the corresponding moving magnet structures (54) in the third-direction. The third direction is perpendicular to the optical axis and intersects the optical axis.

16. The voice coil motor (300) according to claim 15, characterized in that, The fixed magnet component (501) includes a plurality of permanent magnets (51), which are evenly spaced around the optical axis.

17. The voice coil motor (300) according to claim 15 or 16, characterized in that, The moving magnetic structure (54) includes a sixth permanent magnet part (541) and a second magnetic part (542). The sixth permanent magnet part (541) and the permanent magnet part (51) have a repulsive magnetic force in the third direction. The second magnetic part (542) includes a soft magnetic material or a permanent magnet material so that the second magnetic part (542) and the permanent magnet part (51) have an attractive magnetic force in the third direction.

18. The voice coil motor (300) according to claim 17, characterized in that, The second magnetic part (542) includes a soft magnetic material, and the moving magnetic structure (54) further includes a first winding (543). The first winding (543) is disposed on the third-direction side of the second magnetic part (542). The first winding (543) is used to pass current to change the distance between the permanent magnet (51) and the moving magnetic structure (54).

19. The voice coil motor (300) according to claim 18, characterized in that, The second magnetic part (542) includes a first body (5421) and a first protrusion (5422) extending from the first body (5421) along the third direction, and the first winding (543) is sleeved on the first protrusion (5422).

20. The voice coil motor (300) according to claim 19, characterized in that, The dimension of the first protrusion (5422) in the third direction is greater than or equal to the dimension of the first winding (543) in the third direction; and / or The first protrusion (5422) is smaller in the third direction than the first body (5421) is in the third direction.

21. The voice coil motor (300) according to any one of claims 15 to 20, characterized in that, The fixed magnet assembly (501) further includes a yoke (55) that covers at least a portion of the surface of the permanent magnet (51) facing away from the moving magnet structure (54).

22. The voice coil motor (300) according to any one of claims 1 to 21, characterized in that, The mover (42) and the stator (41) are arranged opposite each other in a direction perpendicular to the optical axis. The mover (42) is either a magnet or a coil, and the stator (41) is either a magnet or a coil.

23. A voice coil motor (400), characterized in that, include: The shell (301) has a receiving space; A carrier (3) is housed in the receiving space, the carrier (3) being used to connect to at least a portion of the lens components; The drive assembly (6) includes a stator (61) and a mover (62). The stator (61) is connected to the housing (301), and the mover (62) is connected to the carrier (3). The mover (62) and the stator (61) are arranged opposite to each other in the optical axis direction, and the mover (62) can move relative to the stator (61) in the optical axis direction. The stator (61) includes a first permanent magnet (611), and the mover (62) includes a second permanent magnet (621), a magnetic element (622), and a second winding (623). The magnetic force between the second permanent magnet (621) and the first permanent magnet (611) in the optical axis direction is a repulsive force. The magnetic element (622) includes a soft magnetic material so that the magnetic force between the first permanent magnet (611) and the magnetic element (622) in the optical axis direction is an attractive force. The second winding (623) is disposed on one side of the magnetic element (622) in the optical axis direction. The second winding (623) is used to pass current to change the distance between the stator (61) and the mover (62) in the optical axis direction.

24. The voice coil motor (400) according to claim 23, characterized in that, When no current is applied to the second winding (623), the magnetic force between the stator (61) and the mover (62) is used to suspend the mover (62) in a first position in the receiving space, wherein the mover (62) is a first distance away from the stator (61) in the first position; When current is applied to the second winding (623), the magnetic force between the stator (61) and the mover (62) is used to suspend the mover (62) in a second position in the receiving space, wherein the mover (62) is at a second distance from the stator (61) in the second position, the second distance being different from the first distance.

25. The voice coil motor (400) according to claim 23 or 24, characterized in that, The distance between the mover (62) and the stator (61) is changed by altering the magnitude and / or direction of the current flowing through the second winding (623).

26. The voice coil motor (400) according to any one of claims 23 to 25, characterized in that, The second winding (623) has a smaller dimension in the first direction than the magnetic element (622) in the first direction, and / or the second winding (623) has a smaller dimension in the second direction than the magnetic element (622) in the second direction, wherein the first direction and the second direction are perpendicular to each other and both are perpendicular to the optical axis direction.

27. The voice coil motor (400) according to any one of claims 23 to 26, characterized in that, The second winding (623) is disposed on the side of the magnetic element (622) away from the first permanent magnet (611), or the second winding (623) is disposed between the magnetic element (622) and the first permanent magnet (611).

28. The voice coil motor (400) according to any one of claims 23 to 27, characterized in that, The magnetic component (622) includes a second body (6221) and a second protrusion (6222) extending from the second body (6221) along the optical axis direction, and the second winding (623) is sleeved on the second protrusion (6222).

29. The voice coil motor (400) according to claim 28, characterized in that, The second protrusion (6222) has a dimension in the optical axis direction that is greater than or equal to the dimension of the second winding (623) in the optical axis direction; and / or The second protrusion (6222) is smaller in size in the optical axis direction than the second body (6221) in the optical axis direction.

30. The voice coil motor (400) according to any one of claims 23 to 29, characterized in that, The stator (61) further includes a magnetic yoke (612) that covers at least a portion of the surface of the first permanent magnet (611) facing away from the mover (62).

31. The voice coil motor (400) according to any one of claims 23 to 30, characterized in that, The voice coil motor includes a plurality of drive components (6), which are uniformly arranged around the optical axis on the periphery of the carrier (3).

32. A camera module, characterized in that, It includes a lens and a voice coil motor as described in any one of claims 1 to 31, the voice coil motor being used to drive the lens to move along the optical axis.

33. An electronic device, characterized in that, It includes an image processing chip and a camera module as described in claim 32, wherein the image processing chip is used to process images acquired by the camera module.

Images