Motor, camera module, and electronic device

Abstract

Provided in the present application are a motor, a camera module, and an electronic device. The motor comprises a base, a carrier, n coils and m groups of magnet units, wherein one of the magnet units and the coils is fixed to the base, the other thereof is fixed to the carrier, and the carrier is used for mounting a first optical element, where n and m are integers greater than or equal to 2, and m is greater than n. The n coils are arranged in a first direction, the m groups of magnet units are arranged in the first direction, each of the magnet units comprises at least two polarity directions opposite each other, the at least two polarity directions intersecting with the first direction; and the n coils face the m groups of magnet units for driving the carrier to move relative to the base in the first direction. The distance A between the centerlines of two adjacent coils in the first direction satisfies the following relationship: nA = jk, where j is a positive integer and k is the length of the magnet units in the first direction. When the coils are energized, the carrier can be driven to move in a long stroke relative to the base in the first direction.

Description

Motors, camera modules and electronic equipment

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 8, 2024, with application number: 202410177064.2, and with the invention name “Motor, camera module and electronic equipment”, the priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 28, 2024, with application number: 202410223784.8, and with the invention name “Motor, camera module and electronic equipment”, and the priority to the Chinese patent application filed with the State Intellectual Property Office of China on April 3, 2024, with application number: 202410417502.8, and with the invention name “Motor, camera module and electronic equipment”, all of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of photographing equipment, and in particular to a motor, a camera module and an electronic device. Background Art

[0003] In recent years, with the development of optical imaging technology, people have higher and higher requirements for the camera functions of portable electronic devices. Not only do they require the camera modules equipped with electronic devices to be able to achieve functions such as background blur and clear night shooting, but they also require the camera modules equipped with electronic devices to be able to achieve telephoto shooting and macro shooting.

[0004] When a camera module is in macro mode, it typically captures objects at close range. The closer the working distance, the more motor travel is required. Current mobile phone camera modules with telephoto capabilities have a short motor travel, so the focus distance may exceed the maximum motor travel. This can make focusing difficult during macro photography, resulting in poor macro photography results.

[0005] Based on this, providing a motor with a long stroke that can simultaneously meet the needs of telephoto shooting and macro shooting has become a technical problem that needs to be solved urgently. Summary of the Invention

[0006] The present application provides a motor with a long stroke, a camera module, and an electronic device.

[0007] In a first aspect, an embodiment of the present application provides a motor. The motor includes a base, a carrier, n coils, and m groups of magnet units. One of the magnet unit and the coil is fixed to the base, and the other is fixed to the carrier. The carrier is used to mount a first optical element. n and m are integers greater than or equal to 2, and m is greater than n. The n coils are arranged along a first direction, and the m groups of magnet units are arranged along the first direction. The magnet units include at least two opposite polarity directions, and at least two polarity directions intersect with the first direction. The n coils face the m groups of magnet units and are used to drive the carrier to move relative to the base along the first direction. The distance A between the center lines of two adjacent coils in the first direction satisfies: nA=jk, j is a positive integer, and k is the length of the magnet unit in the first direction.

[0008] It is understandable that when the coils are energized, they can move in the first direction under the action of the magnetic field of the m groups of magnet units, and thus the coils can drive the carrier to move in the first direction relative to the base. By setting nA=jk, after the n coils are translated nA in the first direction, the magnetic field strength and direction of the n coils before and after the movement of nA can be the same. If the magnitude and direction of the current in the n coils before and after the movement can be set to be the same, the magnitude and direction of the Ampere force on the n coils can also be the same. That is, an alternating current with a period of nA can be passed through the n coils, so that when the n coils move in the first direction, under the cooperation of the periodic alternating current and the magnetic field of the m groups of magnet units, the n coils can be continuously subjected to a force in one direction, so that the n coils can continuously move in the first direction, and the carrier can achieve a long-stroke displacement in the first direction relative to the base.

[0009] n and m are integers greater than or equal to 2, with m greater than n. The m groups of magnetic units are arranged along a first direction, and the stroke of the motor depends on the length of the m groups of magnetic units in the first direction. Providing multiple groups of magnetic units can enable the carrier to move over a long stroke along the first direction. Furthermore, multiple coils are subject to multiple Ampere forces in a magnetic field. Compared to a single-coil solution, multiple coils can drive a prism or lens with a larger mass to move. Alternatively, increasing the number of coils while keeping the load constant can increase the carrier's movement speed, thereby facilitating rapid focusing of the camera module.

[0010] When the carrier needs to drive the first optical element to move along the optical axis of the camera module, the first direction can be set to be parallel to the optical axis. In this way, the coil can be moved along the direction parallel to the optical axis of the camera module.

[0011] In some possible implementations, a length of the coil in the first direction is greater than 0.5k and less than k.

[0012] It is understandable that when the coil moves in the magnetic field, the two straight parts on both sides of the coil are subjected to force. The length of the coil in the first direction is greater than 0.5k. The two straight parts on both sides of the coil can be respectively located within the range of two adjacent magnetic fields in opposite directions. When a positive current is passed through the first coil, the forces on the two straight parts on both sides of the coil can be directed in one direction. In this way, the straight parts on both sides of the coil are prevented from having the same direction of magnetic field, resulting in opposite forces on the two straight parts, which cancel each other out and reduce the working efficiency of the coil. The length of the coil in the first direction is less than k, which prevents the coil from crossing three or more magnetic fields, resulting in the magnetic field between the two straight parts of the coil not working. The length of the coil in the first direction is less than k, and the first coil requires less space to set up, which is conducive to reducing the volume of the motor.

[0013] In some possible implementations, the lengths of the m groups of magnet units in the first direction are greater than or equal to 9000 micrometers.

[0014] It can be understood that the length of the m groups of magnet units in the first direction is greater than or equal to 9000 microns, and the length of the magnetic field formed by the m groups of magnet units in the first direction can also be greater than or equal to 9000 microns. Under a longer magnetic field range, the n coils can drive the carrier to move a larger distance relative to the base along the first direction.

[0015] In some possible embodiments, the magnet unit includes a first magnet and a second magnet, the first magnet and the second magnet are arranged along a first direction, the polarity direction of the first magnet is opposite to the polarity direction of the second magnet, the polarity direction of the first magnet and the polarity direction of the second magnet both intersect with the first direction, and the sum of the length of the first magnet in the first direction and the length of the second magnet in the first direction is k.

[0016] Alternatively, the magnet unit includes a first magnet, a second magnet and a third magnet, the first magnet, the second magnet and the third magnet are arranged along a first direction, the third magnet is located between the first magnet and the second magnet, the polarity direction of the first magnet is opposite to the polarity direction of the second magnet, the polarity directions of the first magnet, the second magnet and the third magnet are different and all intersect with the first direction, and the sum of the length of the first magnet in the first direction, the length of the second magnet in the first direction and the length of the third magnet in the first direction is k.

[0017] It is understood that the polarity direction can be the direction from the North Pole (N) to the South Pole (S), or the direction from the South Pole (S) to the North Pole (N). The polarity of one of the first magnet and the second magnet can be the North Pole (N pole), and the polarity of the other can be the South Pole (S pole). The adjacent first magnet and the second magnet can form an NS magnetic field. The m groups of magnet units can include multiple continuous north and south pole magnetic fields, and the direction and intensity of the magnetic field can change periodically with a change period of k. Two magnetic fields in opposite directions form a magnetic field cycle.

[0018] The first, second, and third magnets can form a Halbach magnet array. It is understood that, compared to a magnet array 9 consisting of only north and south pole magnets, the Halbach magnet array has a stronger magnetic field strength near the magnets. When the current flowing through the coil remains constant, the Halbach magnet array exerts a stronger driving force on the coil than a conventional magnet array.

[0019] In some possible implementations, the length of the first magnet in the first direction is equal to the length of the second magnet in the first direction.

[0020] It is understandable that the magnetic field of the m groups of magnet units is more evenly distributed along the first direction. When the coil is energized and moves in the magnetic field, the period of the force it is subjected to may be k / 2.

[0021] In some possible implementations, the n coils include a first coil, a magnetic field direction of the first coil at a first position is the same as a magnetic field direction of the first coil at a second position, and a magnetic field magnitude of the first coil at the first position is the same as a magnetic field magnitude of the first coil at the second position. A distance in the first direction between the first position and the second position is nA.

[0022] It can be understood that n coils move a distance of nA in a first direction, with the positions before and after the movement being the first and second positions, respectively. The n coils include a first coil, and the direction of the magnetic field of the first coil at the first position is the same as the direction of the magnetic field of the first coil at the second position, and the magnitude of the magnetic field of the first coil at the first position is the same as the magnitude of the magnetic field of the first coil at the second position. When the n coils move in the first direction, currents of the same direction and magnitude can be passed through the first and second positions. In this case, the direction of the force applied to the n coils at the first position is the same as the direction of the force applied to the n coils at the second position. For example, the force applied to the n coils at the first position is in the forward direction, and the force applied to the n coils at the second position can also be in the forward direction. When the n coils move in the first direction, a current with a period of nA can be passed through the coils. It is only necessary to design the direction of the current within the nA period so that the force applied to the n coils is always in the forward direction within the nA period, and the n coils can continue to move in the first direction. When the n coils return, the current direction can be reversed, so that the force applied to the coils is reversed, and the coils can drive the carrier backward.

[0023] In some possible implementations, the n coils include a first coil, and when the first coil moves a distance of 0.5k in the first direction, the direction of the current changes.

[0024] It is understood that the magnetic field formed by the m magnet units can have a period of k, with two magnetic fields in opposite directions within a period of k. When the coil moves in the first direction, the current direction changes when the first coil moves a distance of 0.5k in the first direction. The current reversal interval is matched to the length of the magnetic field, so that after each reversal, the force exerted on the coil in the magnetic field is always in the same direction.

[0025] In some possible implementations, the phase difference between the currents flowing through the n coils is 360° / n.

[0026] It can be understood that the n coils are in different positions in the magnetic field of the m groups of magnet units at a certain moment, the magnetic field directions and intensities of the n coils at their respective positions may also be different, and the currents passed through the n coils may have a phase difference, so that when the n coils move along the first direction, the forces acting on the n coils are all in one direction.

[0027] The magnetic field formed by the m magnet units can have a period of k, with two magnetic fields in opposite directions within one period k. The force applied to the coil has a period of 0.5k. During one force applied to the coil, the current phase difference between the n coils is 360° / n. The n coils can take turns exerting force, ensuring that the force applied to the n coils is uniform during movement in the first direction, and the carrier movement is relatively smooth.

[0028] In some possible implementations, the n coils include a first type of coil and a second type of coil. The first type of coil is the coil with the lowest magnetic field strength at a given moment, and the second type of coil is the coil other than the first type of coil. The first type of coil is de-energized, and the second type of coil is energized.

[0029] It can be understood that when the current flowing through the n coils remains unchanged, the coils located at positions with greater magnetic field strength are subjected to greater force. Selecting the second type of coils with greater force to be energized and working, and de-energizing the first type of coils with lower working efficiency is beneficial to reducing the power consumption of the motor.

[0030] In some possible implementations, the n coils include a first coil, a second coil, and a third coil, and the first coil, the second coil, and the third coil are arranged along a first direction;

[0031] The ratio of the displacement of the first coil in the first direction when it is energized to the displacement when it is de-energized is 2:1;

[0032] and / or, a ratio of a displacement of the second coil when energized in the first direction to a displacement when energized is de-energized is 2:1;

[0033] And / or, a ratio of a displacement of the third coil when energized in the first direction to a displacement of the third coil when energized is de-energized is 2:1.

[0034] It can be understood that the n coils include a first coil, a second coil, and a third coil. At any time, two coils are subjected to force to drive the carrier to move. The first coil, the second coil, and the third coil are de-energized in turn. During one force cycle, each coil is de-energized for 1 / 3 of the cycle length. During the process of the n coils moving in the first direction, a large force can still be generated to drive the carrier to move.

[0035] In some possible implementations, the motor further includes an electrical connector, one end of the electrical connector is fixed to the base, the other end is fixed to the carrier, and the electrical connector is electrically connected to the coil, and the electrical connector has deformation capability.

[0036] It is understood that when the n coils drive the carrier to move in the first direction, the electrical connector can deform, thereby providing power to the coils during movement. This prevents the electrical connector from falling off the carrier due to the carrier's long movement path, causing a power outage between the carrier and the second circuit board, and thus de-energizing the coils and affecting motor operation.

[0037] In some possible implementations, the K value of the electrical connector is less than 10 mN / mm.

[0038] It is understandable that by setting the K value of the electrical connector within a smaller range, when the carrier moves along the first direction, the electrical connector will have less obstruction to the movement of the carrier and the motor will consume less power.

[0039] In some possible implementations, the electrical connector includes a spiral structure or a zigzag structure.

[0040] It is understandable that the spiral structure or the broken line structure can be used to extend the length of the electrical connector and reduce the K value of the electrical connector.

[0041] In some possible implementations, the electrical connector includes a spring;

[0042] Alternatively, the electrical connector includes a linear suspension component, one end of the linear suspension component is fixed to the base, the other end is fixed to the carrier, and the linear suspension component is electrically connected to the coil, and the linear suspension component is elastic.

[0043] It is understood that the spring or linear suspension assembly can deform. When the n coils drive the carrier to move in the first direction, the electrical connector can deform, thereby providing power to the coils during movement. This prevents the electrical connector from falling off the carrier due to an excessively long movement path, causing a power outage between the carrier and the second circuit board, which in turn would de-energize the coils and affect motor operation.

[0044] In some possible embodiments, the carrier includes a first side plate and a second side plate, the first side plate and the second side plate are arranged at an angle, the first optical element is mounted on the surface of the first side plate away from the second side plate, n coils are fixed to the surface of the second side plate away from the first side plate, and m groups of magnet units are fixed to the base.

[0045] It can be understood that the first side plate and the second side plate are arranged at an angle to form an inclined surface, which can effectively utilize space and reduce the volume of the camera module.

[0046] In some possible embodiments, the carrier further includes a first protrusion and a second protrusion, the first protrusion and the second protrusion being arranged along the second direction, the first side plate and the second side plate being connected between the first protrusion and the second protrusion, and the first direction and the second direction intersecting. The first protrusion and the second protrusion are slidably connected to the base via a guide rod.

[0047] It is understood that, compared to the solution where one side of the carrier is connected to the guide rod, by providing the first and second protrusions connected to both sides of the first and second side plates, the first and second protrusions are slidably connected to the base via the guide rod. The first optical element is mounted on the first side plate, and the carrier is connected to the guide rod at both sides of the first optical element and the coil. When the carrier drives the first optical element to move, the force is more balanced, the movement is more stable, and the risk of carrier shaking is reduced.

[0048] In some possible embodiments, the motor further includes a first guide rod and a second guide rod, the first guide rod and the second guide rod being fixed to the base at intervals along the second direction, the first guide rod and the second guide rod being located on either side of the coil and spaced apart from the coil, with the first direction and the second direction intersecting. The carrier is slidably connected to the first guide rod and the second guide rod, with the length direction of the first guide rod and the length direction of the second guide rod being parallel to the first direction.

[0049] It can be understood that by setting the length direction of the first guide rod and the length direction of the second guide rod to be parallel to the first direction, when the carrier moves along the first direction, the first guide rod and the second guide rod can provide support, and at the same time can also guide the moving direction of the carrier, thereby avoiding dislocation of the carrier during movement and ensuring rapid and stable movement of the carrier.

[0050] In some possible embodiments, the base includes a bottom plate, a first bearing portion, a second bearing portion, a third bearing portion, and a fourth bearing portion, wherein the first bearing portion, the second bearing portion, the third bearing portion, and the fourth bearing portion 17 are fixed to the periphery of the bottom plate. The first bearing portion and the second bearing portion are arranged opposite each other and spaced apart along a first direction, the third bearing portion and the fourth bearing portion are arranged opposite each other and spaced apart along the first direction, the first bearing portion and the third bearing portion are arranged opposite each other and spaced apart along a second direction, and the second bearing portion and the fourth bearing portion are arranged opposite each other and spaced apart along the second direction. The ends of the first guide rod are respectively fixed to the first bearing portion and the second bearing portion, and the ends of the second guide rod are respectively fixed to the third bearing portion and the fourth bearing portion.

[0051] It can be understood that the supporting columns can be used to fix the guide rods. By arranging the supporting columns relative to each other on the bottom plate of the base, the length direction of the first guide rod and the length direction of the second guide rod can be parallel to the first direction.

[0052] In some possible embodiments, a first slide groove and a second slide groove are provided on the bottom surface of the carrier, the first guide rod is slidably connected to the first slide groove, and the second guide rod is slidably connected to the second slide groove. The first slide groove includes a "V" shape structure, and the second slide groove includes a "U" shape structure.

[0053] It is understood that the first and second chutes can serve as positioning structures for the first and second guide rods, facilitating rapid positioning and installation between the carrier and the first and second guide rods. The first guide rod can be slidably connected within the "V"-shaped structure. The first guide rod and the "V"-shaped structure have two contact points along the Y-axis, enabling rapid positioning of the carrier along the Y-axis during assembly of the carrier and the first and second guide rods. If the actual product dimensions of the first guide rod are slightly larger than the designed dimensions due to tolerance, the first guide rod can still be assembled within the "V"-shaped structure.

[0054] The width of the U-shaped slot can be greater than the width of the second guide rod. This allows for some manufacturing tolerances on the carrier, ensuring that even if the carrier's dimensions are slightly larger or smaller due to manufacturing errors, the carrier can still be successfully slidably connected to the first and second guide rods. The U-shaped structure improves tolerance and helps reduce production costs.

[0055] In some possible implementations, there are two "V"-shaped structures and one "U"-shaped structure. The two "V"-shaped structures and one "U"-shaped structure are sequentially connected to form a triangle, and the projection of the center of the carrier on the plane where the triangle is located coincides with the triangle.

[0056] It is understandable that a three-point connection is formed between the carrier and the first guide rod and the second guide rod, which can reduce the risk of the carrier shaking during movement.

[0057] In some possible embodiments, the motor further includes a first ball and a second ball, the first ball and the second ball being fixed to the carrier at intervals along the second direction, the first ball and the second ball being located on either side of the coil and spaced apart from the coil, with the first direction and the second direction intersecting. The first ball and the second ball are slidably connected to the base.

[0058] It is understandable that, compared with the solution of using guide rods to achieve sliding connection of the carrier to the base, the use of balls can reduce the area of ​​the sliding connection, which is conducive to reducing friction resistance.

[0059] In some possible implementations, the motor further includes a tunnel magnetoresistance effect sensor and a magnetic grid. The tunnel magnetoresistance effect sensor is fixed to the carrier and spaced apart from the coil. The magnetic grid is fixed to the base and spaced apart from the magnet unit. The tunnel magnetoresistance effect sensor and the magnetic grid are arranged relative to each other.

[0060] It is understood that the TMR sensor can be used in conjunction with a magnetic grating to measure the displacement of a carrier moving in a first direction. TMR sensors have advantages such as high accuracy, high sensitivity, low power consumption, small size, good temperature stability, and a wide operating temperature range.

[0061] In some possible implementations, the motor further includes a magnetic sheet made of metal, which is fixed to the carrier or the base and spaced apart from the coil, and the magnetic sheet and the magnet unit are arranged relative to each other.

[0062] It is understandable that there is an attractive force between the magnetic sheet and the magnet unit, and the magnetic sheet can limit the carrier in the direction toward the magnet unit, thereby reducing the risk of the carrier shaking.

[0063] In some possible implementations, the motor further includes a buffer member, which is fixed on the base. The buffer member and the carrier are arranged opposite to each other along the first direction, and the buffer member is flexible.

[0064] It is understandable that when the carrier moves along the first direction or collides with the base during reliability testing, the buffer member 86 can absorb deformation impact energy and reduce damage to the carrier caused by the collision impact.

[0065] Secondly, embodiments of the present application provide a camera module. The camera module includes a first optical element, a photosensitive element, and a motor. The photosensitive element is located on the light-emitting side of the first optical element, and the first optical element is mounted on a motor carrier. The motor of the camera module is capable of achieving a long displacement stroke, resulting in high imaging quality and an enhanced shooting experience.

[0066] In some possible implementations, the first optical element is a prism, and the camera module may further include a second optical element. The second optical element may be located on the light-emitting side of the first optical element and on the light-incident side of the photosensitive element.

[0067] It can be understood that the mass of the prism is larger than that of the lens. The motor of the present application has a large load capacity and can carry the prism to move at a faster speed. The camera module has a faster response speed and the user experience is better.

[0068] In some possible embodiments, the camera module may further include a third optical element and a fourth optical element, wherein the third optical element is located on the light incident side of the prism, and the fourth optical element is located on the light incident side of the prism, with the third and fourth optical elements spaced apart along the first direction. The motor carrier drives the prism to move in the first direction, wherein in the first position, the prism and the third optical element are disposed opposite each other, and in the second position, the prism and the fourth optical element are disposed opposite each other.

[0069] It is understandable that the optical power of the third optical element and the optical power of the fourth optical element can be different. When the prism is in the first position, the third optical element and the second optical element form a set of focusing lens groups. When the prism is in the second position, the fourth optical element and the second optical element form another set of focusing lens groups, and the optical power of the two sets of focusing lens groups can be different. When the camera module has different focusing requirements, the prism can be controlled by a motor to move in the first direction, switching the focusing lens group to meet the focusing requirements of the camera module. The user experience is better.

[0070] In a third aspect, embodiments of the present application provide an electronic device. The electronic device includes a housing and a camera module, wherein the camera module is mounted in the housing. The electronic device provides an improved photography experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0072] FIG1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

[0073] FIG2 is a partial cross-sectional view of the electronic device shown in FIG1 taken along line AA in one embodiment;

[0074] FIG3 is a schematic structural diagram of an embodiment of the motor shown in FIG2 ;

[0075] FIG4 is an exploded schematic diagram of an embodiment of the motor shown in FIG3 ;

[0076] FIG5 is a partial structural schematic diagram of an embodiment of the motor shown in FIG3 ;

[0077] FIG6 is a schematic structural diagram of the structure shown in FIG5 at another angle;

[0078] FIG7 is a partial structural schematic diagram of an embodiment of the motor shown in FIG3 ;

[0079] FIG8a is a schematic structural diagram of an embodiment of the magnet array shown in FIG7 at another angle;

[0080] FIG8b is a schematic structural diagram of an embodiment of the structure shown in FIG8a at section line BB;

[0081] FIG9 is a schematic structural diagram of an embodiment of the carrier shown in FIG3 ;

[0082] FIG10 is a schematic diagram of a portion of the structure of the motor shown in FIG3 at another angle;

[0083] FIG11 is a partial structural schematic diagram of an embodiment of the motor shown in FIG3 ;

[0084] FIG12 is a partial structural schematic diagram of an embodiment of the motor shown in FIG3 ;

[0085] FIG13 is a schematic diagram of a portion of the structure of the motor shown in FIG3 at another angle;

[0086] FIG14 is a partial cross-sectional view of an embodiment of the structure shown in FIG13 at section line CC;

[0087] FIG15 is a schematic assembly diagram of an embodiment of the structure shown in FIG14 ;

[0088] FIG16 is a schematic structural diagram of an embodiment of the structure shown in FIG15 at section line DD;

[0089] FIG17 is a schematic diagram of an embodiment of the magnitude and direction of the force applied to the first coil shown in FIG15 when the first coil moves in the first direction while the current direction remains unchanged;

[0090] FIG18 is a schematic diagram of an embodiment of the current and force conditions when the first coil shown in FIG16 moves;

[0091] 19 to 26 are schematic diagrams showing the relative positions of n coils and a magnet array at different times in one embodiment;

[0092] FIG27 is a schematic diagram of power-on of an embodiment of the first coil, the second coil, and the third coil during the movement process as shown in FIG19 to FIG26;

[0093] FIG28 is a schematic diagram of an embodiment of the relationship between displacement and force of n coils in the energized manner as shown in FIG27 ;

[0094] FIG29 is a schematic diagram of another embodiment of the power-on process of the first coil, the second coil, and the third coil during the movement process as shown in FIG19 to FIG26;

[0095] FIG30 is a schematic diagram of another embodiment of the coil energizing current;

[0096] FIG31 is a schematic diagram of another embodiment of the coil energizing current;

[0097] FIG32 is a schematic assembly diagram of another embodiment of the coil and magnet unit shown in FIG14;

[0098] FIG33 is a schematic assembly diagram of another embodiment of the coil and magnet unit shown in FIG14;

[0099] FIG34 is a schematic assembly diagram of yet another embodiment of the coil and magnet unit shown in FIG14;

[0100] FIG35 is a schematic structural diagram of another embodiment of the electrical connector shown in FIG13;

[0101] FIG36 a is a schematic structural diagram of another embodiment of the electrical connector shown in FIG13 ;

[0102] FIG36 b is a partial structural schematic diagram of another embodiment of the electrical connector 5 shown in FIG13 ;

[0103] FIG36c is a partial cross-sectional view of an embodiment of the extension 53 shown in FIG36b taken along section line JJ;

[0104] FIG37 is a partial cross-sectional view of an embodiment of the structure shown in FIG13 at section line EE;

[0105] FIG38 is a partial structural schematic diagram of an embodiment of the motor shown in FIG3 at another angle;

[0106] FIG39 is a schematic cross-sectional view of an embodiment of the motor shown in FIG38 at section line FF;

[0107] FIG40 is a schematic cross-sectional view of an embodiment of the motor shown in FIG38 at section line GG;

[0108] FIG41 is a schematic cross-sectional view of an embodiment of the motor shown in FIG38 taken along section line HH;

[0109] FIG42 is a schematic structural diagram of another embodiment of the motor shown in FIG2 ;

[0110] FIG43 is an exploded schematic diagram of one embodiment of the motor shown in FIG41;

[0111] FIG44 is a schematic cross-sectional view of the motor shown in FIG42 at section line II in one embodiment. DETAILED DESCRIPTION

[0112] For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this application are explained and described below.

[0113] Lens: A lens is a component that uses the principle of refraction to allow light from the scene to pass through the lens and form a clear image on the focal plane. A lens may contain one or more lenses, which can be concave or convex.

[0114] Optical Axis: The direction of light propagation through an optical system, referenced to the principal ray at the center of the field of view. For symmetrical transmissive systems, this axis typically coincides with the axis of rotation of the optical system. For off-axis and reflective systems, the optical axis may also appear as a broken line.

[0115] Focus: Focusing is also called focusing. The process of changing the distance between the subject and the subject using the camera's focus mechanism to achieve a clear image of the subject is called focusing. Digital cameras typically offer a variety of focus modes, including autofocus, manual focus, and multiple focus modes.

[0116] Autofocus: Autofocus uses the principle of light reflection from an object. The reflected light is received by the sensor on the camera (such as a charge-coupled device (CCD)), processed by a computer, and drives the electric focus device to focus. This is called autofocus.

[0117] Macro photography refers to capturing objects at a close distance with a high magnification. It is often used to capture very small objects, such as flowers and insects. Macro photography usually requires capturing the object at close range. The closer the working distance, the longer the motor travel required.

[0118] Halbach magnet: Through the combination of three directional magnets, stronger magnetic thrust performance is obtained, but at the same time the required anti-overturning moment also increases.

[0119] Linear suspension assembly: Trace Suspension Assembly (TSA). A component with a spring and signal line integrally molded.

[0120] The embodiments of the present application are described below in conjunction with the accompanying drawings. The embodiments described herein with reference to the accompanying drawings are exemplary and intended to be used to explain the present application, and should not be understood as limiting the present application.

[0121] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. It should be understood that in the present application, "electrical connection" can be understood as the physical contact and electrical conduction of components; it can also be understood as the form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals. "Connection" and "connected" can both refer to a mechanical connection relationship or a physical connection relationship. For example, A is connected to B or A and B are connected to each other, which means that there is a fastening component (such as a screw, bolt, rivet, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0122] Furthermore, the word "fixed" in this article should also be understood in a broad sense. For example, "fixed" can be directly fixed or indirectly fixed through an intermediate medium. Among them, "fixed" means connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. "Multiple" refers to two or more than two.

[0123] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0124] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of the features.

[0125] In addition, in the embodiments of the present application, the limitations of the relative position relationship mentioned, such as parallel, perpendicular, aligned, etc., are all for the current state of the art, rather than absolutely strict limitations, and a small amount of deviation is allowed, and it is possible to be approximately parallel, approximately perpendicular, approximately aligned, etc. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 degrees and 100 degrees.

[0126] Fig. 1 is a schematic structural diagram of an embodiment of an electronic device 1000 provided in an embodiment of the present application. Fig. 2 is a partial cross-sectional view of an embodiment of the electronic device 1000 shown in Fig. 1 taken along line AA.

[0127] The electronic device 1000 may be a device with a camera function, such as a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, an in-vehicle device, a video surveillance device, a wearable device, augmented reality (AR) glasses, an AR helmet, virtual reality (VR) glasses, or a VR helmet. The electronic device 1000 of the embodiment shown in FIG1 is described using a mobile phone as an example.

[0128] As shown in Figures 1 and 2, the electronic device 1000 may include a camera module 100, a housing 200, and a screen 300. The camera module 100 may be a rear camera module 100 or a front camera module 100. This application is introduced by taking the camera module 100 as an example of a rear camera module 100. It should be noted that Figures 1, 2 and the following related figures only schematically illustrate some components included in the electronic device 1000, and the actual shape, actual size, actual position and actual structure of these components are not limited by Figures 1, 2 and the following figures. In other embodiments, when the electronic device 1000 is a device of some other form, the electronic device 1000 may also not include the screen 300.

[0129] For ease of description, the thickness direction of the electronic device 1000 is defined as the X-axis. The length direction of the electronic device 1000 is defined as the Y-axis. The width direction of the electronic device 1000 is defined as the Z-axis. It is understood that the coordinate system setting of the electronic device 1000 can be flexibly set according to specific actual needs.

[0130] In this embodiment, the housing 200 may include a frame 210 and a back cover 220. The back cover 220 is fixedly connected to the frame 210. For example, the back cover 220 may be fixedly connected to the frame 210 by adhesive. The back cover 220 may also be integrally formed with the frame 210, i.e., the back cover 220 and the frame 210 form a single unitary structure.

[0131] Alternatively, the screen 300 can be located on the side of the frame 210 away from the back cover 220. In this case, the screen 300 and the back cover 220 are located on either side of the frame 210. The screen 300, the frame 210, and the back cover 220 together enclose the interior of the electronic device 1000. The interior of the electronic device 1000 can be used to house components of the electronic device 1000, such as a battery, a receiver, or a microphone.

[0132] In some embodiments, the screen 300 can be used to display images, etc. The screen 300 can be a flat screen or a curved screen. The display screen of the screen 300 can be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, or a liquid crystal display (LCD).

[0133] In some embodiments, the electronic device 1000 may further include an image processor 400. The image processor 400 may be located inside the electronic device 1000. The image processor 400 is communicatively connected to the camera module 100, and the image processor 400 is used to obtain image data from the camera module 100 and process the image data. The communication connection between the camera module 100 and the image processor 400 may include data transmission through electrical connection methods such as wiring, or data transmission may be achieved through coupling or the like. It is understandable that the camera module 100 and the image processor 400 may also be communicatively connected through other methods that can achieve data transmission.

[0134] Image processor 400 optimizes and processes digital image signals and transmits the processed signals to screen 300. Image processor 400 can be an image processing chip or a digital signal processing chip. Its function is to promptly and quickly transmit data obtained by the photosensitive chip to the central processing unit and refresh the photosensitive chip. Therefore, the quality of image processor 400 directly affects image quality (such as color saturation and clarity).

[0135] In some embodiments, the electronic device 1000 may further include an analog-to-digital converter 500, which is connected between the camera module 100 and the image processor 400. The analog-to-digital converter 500 is used to convert the signal generated by the camera module 100 into a digital image signal and transmit it to the image processor 400.

[0136] In some embodiments, the electronic device 1000 may further include a memory 600, which is communicatively connected to the image processor 400. The image processor 400 processes the digital image signal and then transmits the image to the memory 600, so that when the image is subsequently needed, the image can be retrieved from the memory 600 and displayed on the screen 300 at any time. In some embodiments, the image processor 400 may further compress the processed digital image signal before storing it in the memory 600 to save space in the memory 600.

[0137] For example, the camera module 100 can be located inside the electronic device 1000. The camera module 100 can be fixedly connected to the side of the screen 300 facing the back cover 220. The back cover 220 can be provided with a light-transmitting hole 2201. The shape of the light-transmitting hole 2201 is not limited to the circular shape shown in FIG. 1 . The light-transmitting hole 2201 connects the interior of the electronic device 1000 to the exterior of the electronic device 1000. Light outside the electronic device 1000 can enter the interior of the electronic device 1000 through the light-transmitting hole 2201. The camera module 100 can collect ambient light entering the interior of the electronic device 1000.

[0138] The image processor 400, the analog-to-digital converter 500 and the memory 600 may also be located inside the electronic device 1000. In FIG1 , the image processor 400, the analog-to-digital converter 500 and the memory 600 are schematically represented by dashed boxes.

[0139] In some embodiments, the back cover 220 may include a light-transmitting lens, which is installed in the light-transmitting hole 2201 to allow light to pass through and is dust-proof and waterproof.

[0140] It is understandable that the installation position of the camera module 100 of the electronic device 1000 in the embodiment shown in Figure 1 is merely schematic, and the present application does not strictly limit the installation position of the camera module 100. In some other embodiments, the camera module 100 may also be installed at other positions of the electronic device 1000, for example, the camera module 100 may be installed in the upper middle or upper right corner of the back of the electronic device 1000. In some other embodiments, the electronic device 1000 may include a terminal body and an auxiliary component that can be rotated, moved or disassembled relative to the terminal body, and the camera module 100 may also be set on the auxiliary component. In addition, the size, quantity and position of the image processor 400, analog-to-digital converter 500, and memory 600 shown in Figure 1 are merely schematic representations and can be adjusted as needed, and the present application does not limit this.

[0141] As shown in Figure 2, the camera module 100 may include a motor 10, a first optical element 204 and a photosensitive component 30. The photosensitive component 30 may be located on the light-emitting side of the first optical element 204. Light can pass through the first optical element 204 and illuminate the photosensitive surface of the photosensitive component 30. The photosensitive component 30 may be used to convert an optical image into an electrical signal, i.e., an analog image signal, and transmit it to the analog-to-digital converter 500, so as to be converted into a digital image signal by the analog-to-digital converter 500 and given to the image processor 400. The motor 10 may be used to drive the first optical element 204 to move.

[0142] In some embodiments, the camera module 100 can be a periscope camera module 100 (i.e., the optical axis of the camera module 100 can be in any direction on the YZ plane). In this way, the camera module 100 has a lower height in the X-axis direction, making it more suitable for use in thin electronic devices 1000. In other embodiments, the camera module 100 can also be a vertical camera module 100 (i.e., the optical axis of the camera module 100 can be parallel to the X-axis direction).

[0143] In some embodiments, the camera module 100 may further include a second optical element 203. The second optical element 203 may be located on the light-emitting side of the first optical element 204 and on the light-entering side of the photosensitive element 302. For example, the first optical element 204 may be a prism, and the second optical element 203 may be a lens assembly.

[0144] In some embodiments, the camera module 100 may further include a second optical element 203. The first optical element 204 may be a lens assembly (not shown). The second optical element 203 may be a lens assembly. The second optical element 203 is located on the light-emitting side of the first optical element 204 and on the light-entering side of the photosensitive element 302. The motor 10 may be used to drive the lens assembly to move to achieve focus of the camera module 100.

[0145] In some embodiments, the camera module 100 may further include a second optical element 203, a third optical element 201, and a fourth optical element 202. The second optical element 203, the third optical element 201, and the fourth optical element 202 may all be lens groups. The first optical element 204 is a prism (as shown in FIG2 ). The third optical element 201 and the fourth optical element 202 are both located on the light incident side of the prism, and the second optical element 203 is located on the light exit side of the first optical element 204. The prism can be used to change the direction of the optical axis. For example, the prism can change the direction of the optical axis from a direction parallel to the X-axis to a direction parallel to the Z-axis.

[0146] For example, the third optical element 201 and the fourth optical element 202 can be spaced apart along the first direction. The optical focal length of the third optical element 201 and the optical focal length of the fourth optical element 202 can be different. The motor 10 can drive the prism to move in the first direction, so that the prism can be arranged relative to the third optical element 201 in the first position, and the prism and the fourth optical element 202 can be arranged relative to each other in the second position. In this way, the third optical element 201 and the second optical element 203 form a set of focusing lens groups, and the fourth optical element 202 and the second optical element 203 form another set of focusing lens groups, and the optical focal lengths of the two sets of focusing lens groups are different. When the camera module 100 has different focusing requirements, the motor 10 can be used to control the prism to move along the Z-axis direction and switch the focusing lens group to meet the focusing requirements of the camera module 100. The embodiment drawings of this article are introduced by taking the first optical element 204 as a prism as an example.

[0147] In some embodiments, the mass of the prism can be greater than or equal to 2000 mg. The movement displacement of the prism can be greater than or equal to 9000 microns. When the movement displacement of the prism is greater than or equal to 9000 microns, the movement time of the motor 10 driving the prism can be less than or equal to 60 milliseconds.

[0148] In some embodiments, the camera module 100 may include two motors 10, and the two motors 10 are respectively used to drive the first optical element 204 and the second optical element 203 to move along the Z-axis direction.

[0149] For example, the photosensitive assembly 30 may include a filter 301 and a photosensitive element 302. The photosensitive element 302 is located on the image side of the filter 301. Light can sequentially pass through the first optical element 204 and the filter 301 to illuminate the photosensitive surface of the photosensitive element 302. The photosensitive surface of the photosensitive element 302 also serves as the photosensitive surface of the photosensitive assembly 30. The photosensitive element 302 may be located on the light-emitting side of the second optical element 203.

[0150] Photosensitive element 302 can be used to convert light signals into electrical signals. Photosensitive element 302 (also known as an image sensor) can be a semiconductor chip with hundreds of thousands to millions of photodiodes on its surface. When exposed to light, these diodes generate an electrical charge. Photosensitive element 302 can be a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS). A CCD is made of a highly sensitive semiconductor material and can convert light into electrical charge. A CCD consists of many photosensitive units, typically measured in millions of pixels. When light strikes the surface of a CCD, each photosensitive unit reflects an electrical charge on the component. The signals generated by all the photosensitive units are combined to form a complete image. CMOS devices primarily utilize semiconductors made of silicon and germanium, resulting in the coexistence of N (negatively charged) and P (positively charged) semiconductors within the CCD. The current generated by these two complementary effects can be recorded and interpreted as an image by a processing chip.

[0151] The filter 301 can be used to filter out unnecessary wavelengths in the light, prevent the photosensitive element 302 from generating false colors or ripples, and thus improve its effective resolution and color reproduction. Exemplarily, the filter 301 can be an infrared filter 301. In some other embodiments, the camera module 100 can also cancel the separate filter 301 structure, but instead perform surface treatment or material treatment on some optical elements (such as the second optical element 203, the third optical element 201, or the fourth optical element 202) to achieve the filtering function. This application does not strictly limit the specific embodiments of the structural members or structures used to achieve filtering.

[0152] The above describes in detail the structures of the electronic device 1000 and the camera module 100. The following describes several embodiments of the motor 10 in conjunction with the relevant figures. It should be understood that in the following figures, for simplicity, when identical structures are included in the figures, some may be numbered and some may not, or all may be numbered.

[0153] Fig. 3 is a schematic structural diagram of an embodiment of the motor 10 shown in Fig. 2. Fig. 4 is an exploded schematic diagram of an embodiment of the motor 10 shown in Fig. 3.

[0154] As shown in Figures 3 and 4, the motor 10 may include a base 1, a carrier 2, n coils 3, m groups of magnet units 4, an electrical connector 5, a first circuit board 6, a second circuit board 7, a first guide rod 81, a second guide rod 82, a tunnel magnetoresistive effect sensor 83, a magnetic grid 84, a magnetic attraction sheet 85, and a buffer 86. n and m are integers greater than or equal to 2, and m is greater than n. The drawings of this application take the number of coils 3 as an example for illustration (i.e., n = 3).

[0155] Fig. 5 is a partial structural diagram of an embodiment of the motor 10 shown in Fig. 3. Fig. 6 is a structural diagram of the structure shown in Fig. 5 from another angle.

[0156] As shown in Figures 5 and 6, the base 1 may include a bottom plate 11, a first side wall 12, a second side wall 13, a first supporting portion 14, a second supporting portion 15, a third supporting portion 16, and a fourth supporting portion 17. The first side wall 12, the second side wall 13, the first supporting portion 14, the second supporting portion 15, the third supporting portion 16, and the fourth supporting portion 17 may be fixed to the periphery of the bottom plate 11.

[0157] In some embodiments, the base plate 11 may include a top surface 111 and a bottom surface 112 disposed opposite each other. The first circuit board 6 may be fixed to the bottom surface 112 of the base plate 11. In some embodiments, the base plate 11 may be provided with a through hole 113 extending through the top surface 111 and the bottom surface 112 of the base plate 11. The first circuit board 6 may be fixed to the bottom surface 112 of the base plate 11. The first circuit board 6 and the wall surface of the through hole 113 may enclose a mounting groove 114.

[0158] In some embodiments, the first circuit board 6 may be a printed circuit board (PCB).

[0159] In some embodiments, for example, the first supporting portion 14 and the second supporting portion 15 may be disposed opposite each other and spaced apart along a first direction. The third supporting portion 16 and the fourth supporting portion 17 may be disposed opposite each other and spaced apart along the first direction. The first supporting portion 14 and the third supporting portion 16 may be disposed opposite each other and spaced apart along a second direction. The second supporting portion 15 and the fourth supporting portion 17 may be disposed opposite each other and spaced apart along the second direction.

[0160] For example, the first direction may be parallel to the Z-axis direction, and the second direction may be parallel to the Y-axis direction.

[0161] The first guide rod 81 and the second guide rod 82 can be fixed to the base 1 at intervals along the second direction. The length direction of the first guide rod 81 and the length direction of the second guide rod 82 can be parallel to the first direction. Exemplarily, the two ends of the first guide rod 81 can be fixed to the first bearing portion 14 and the second bearing portion 15, respectively. The two ends of the second guide rod 82 can be fixed to the third bearing portion 16 and the fourth bearing portion 17, respectively. Exemplarily, the first bearing portion 14 can be provided with a first through hole 141. The second bearing portion 15 can be provided with a second through hole 151. The third bearing portion 16 can be provided with a third through hole 161. The fourth bearing portion 17 can be provided with a fourth through hole 171. The two ends of the first guide rod 81 are respectively fixed in the first through hole 141 and the second through hole 151. The two ends of the second guide rod 82 are respectively fixed in the third through hole 161 and the fourth through hole 171.

[0162] In some embodiments, there may be four buffer members 86 , which may be fixed to the surfaces of the first supporting portion 14 , the second supporting portion 15 , the third supporting portion 16 , and the fourth supporting portion 17 on one side facing the movement space 18 .

[0163] The first side wall 12 and the second side wall 13 may be spaced apart along the second direction on the bottom plate 11. For example, the first side wall 12 may be connected between the first supporting portion 14 and the second supporting portion 15. The second side wall 13 may be connected between the third supporting portion 16 and the fourth supporting portion 17. The bottom plate 11, the first side wall 12, and the second side wall 13 may collectively enclose a movement space 18.

[0164] In some embodiments, the magnetic grid 84 can be fixed to the side of the first side wall 12 or the second side wall 13 facing the movement space 18. For example, the magnetic grid 84 can be fixed to the second side wall 13. In other embodiments, the magnetic grid 84 can also be fixed to the top surface 111 of the bottom plate 11.

[0165] In some embodiments, the magnetic grid 84 may include a plurality of magnets with a polarity direction of N (north) and a plurality of magnets with a polarity direction of S (south). The plurality of N-pole magnets and the plurality of S-pole magnets are alternately arranged in sequence along the first direction to form a periodically varying magnetic field.

[0166] In some embodiments, the base 1 can be a one-piece structural member. The two components being formed into an integrated structural member through an integral molding process means that during the process of forming one of the two components, the component is immediately connected to the other component, without the need for further processing (such as bonding, welding, snap-fit ​​connection, or screw connection) to connect the two components together. For example, the bottom plate 11, first side wall 12, second side wall 13, first bearing portion 14, second bearing portion 15, third bearing portion 16, and fourth bearing portion 17 can be integrally formed through a mold injection molding process.

[0167] FIG. 7 is a partial structural diagram of an embodiment of the motor 10 shown in FIG. 3 .

[0168] As shown in Figure 7, m groups of magnet units 4 can be fixed to the base 1. For example, the m groups of magnet units 4 can be fixedly connected to the first circuit board 6 and positioned within the mounting slot 114. This can reduce the height of the camera module 100 in the X-axis direction. The m groups of magnet units 4 are arranged along the first direction to form a magnet array 9.

[0169] In other embodiments, the m groups of magnet units may also be fixed on the first side wall 12 or the second side wall 13 of the base 1 .

[0170] Figure 8a is a partial structural diagram of an embodiment of the magnet array 9 shown in Figure 7 at another angle. Figure 8b is a structural diagram of an embodiment of the structure shown in Figure 8a at section line BB.

[0171] As shown in Figures 8a and 8b, m groups of magnet units 4 are arranged along a first direction. The magnet units 4 may include at least two polarity directions in opposite directions, and at least two polarity directions intersect with the first direction. It is understood that the polarity direction may be a direction from the North Pole (N) to the South Pole (S), or a direction from the South Pole (S) to the North Pole (N).

[0172] The length of the magnet unit 4 in the first direction is k. Exemplarily, the magnet unit 4 may include one or more magnets.

[0173] In some embodiments, the magnet unit 4 may include a first magnet 41 and a second magnet 42. The first magnet 41 and the second magnet 42 may be arranged along a first direction, and the polarity direction of the first magnet 41 may be opposite to the polarity direction of the second magnet 42. The polarity of one of the first magnet 41 and the second magnet 42 may be a north pole (N pole), and the polarity of the other may be a south pole (S pole). The polarity direction of the first magnet 41 and the polarity direction of the second magnet 42 may both intersect with the first direction. The sum of the length of the first magnet 41 in the first direction and the length of the second magnet 42 in the first direction is k.

[0174] It is understood that the arrangement direction of the first magnet 41 and the second magnet 42 may not be completely parallel to the arrangement direction of the m groups of magnet units 4. The arrangement direction of the first magnet 41 and the second magnet 42 may have a small angle with the arrangement direction of the m groups of magnet units 4, and the angle may be less than or equal to 10°. For example, the angle may be 2°, 5°, or 8°.

[0175] In some embodiments, the magnet unit 4 may include a first magnet 41, a second magnet 42, and a third magnet 43. The first magnet 41, the second magnet 42, and the third magnet 43 may be arranged along a first direction. The third magnet 43 may be located between the first magnet 41 and the second magnet 42. The polarity direction of the first magnet 41 may be opposite to the polarity direction of the second magnet 42. The polarity directions of the first magnet 41, the second magnet 42, and the third magnet 43 are all different and intersect with the first direction. The sum of the length of the first magnet 41 in the first direction, the length of the second magnet 42 in the first direction, and the length of the third magnet 43 in the first direction is k.

[0176] In this way, the first magnet 41, the second magnet 42 and the third magnet 43 can form a Halbach magnet array. It can be understood that compared with the magnet array 9 having only north and south pole magnets, the Halbach magnet array has a stronger magnetic field strength near the magnets.

[0177] In some embodiments, the magnet unit 4 may further include a fourth magnet 44. The first magnet 41, the second magnet 42, the third magnet 43, and the fourth magnet 44 may be arranged along the first direction. The fourth magnet 44 is located on the side of the second magnet 42 away from the first magnet 41. The polarity direction of the fourth magnet 44 is different from the polarity directions of the first magnet 41, the second magnet 42, and the third magnet 43. The polarity direction of the fourth magnet 44 intersects with the first direction. The sum of the length of the first magnet 41 in the first direction, the length of the second magnet 42 in the first direction, the length of the third magnet 43 in the first direction, and the length of the fourth magnet 44 in the first direction is k.

[0178] It is understandable that by providing the fourth magnet 44 , the fourth magnet 44 can form a Halbach magnet array with the first magnet 41 and the second magnet 42 in two adjacent magnet units 4 , further enhancing the magnetic field strength near the m groups of magnet units 4 .

[0179] As shown in Figures 8a and 8b, the first magnet 41 and the second magnet 42 in one group of magnet units 4 form an NS magnetic field, and also form an NS magnetic field with the adjacent magnet units 4. In this way, multiple NS magnetic fields arranged along the first direction constitute the magnetic field of m groups of magnet units 4.

[0180] In some embodiments, the length of the first magnet 41 in the first direction can be the same as the length of the second magnet 42 in the first direction. For example, the length of the first magnet 41 in the first direction can be 0.5 k. In this way, the magnetic field of the m groups of magnet units 4 is more evenly distributed along the first direction.

[0181] In some embodiments, the length of the third magnet 43 in the first direction and the length of the fourth magnet 44 in the first direction may be the same.

[0182] In some embodiments, when the magnet unit 4 further includes a fourth magnet 44, the motor 10 may further include a supplementary magnet 91. The supplementary magnet 91 and the m groups of magnet units 4 are arranged along the first direction to form a magnet array 9. The supplementary magnet 91 is located on one side of the m groups of magnet units 4 and is adjacent to the fourth magnet 44. The magnetic field direction of the supplementary magnet 91 may be the same as the magnetic field direction of the first magnet 41. In this way, the supplementary magnet 91 may form a Halbach magnet array with the second magnet 42 and the fourth magnet 44 in the adjacent magnet unit 4. It is understandable that by providing the supplementary magnet 91, the length of the magnetic field in the first direction can be further extended, and the fourth magnet 44 of the last group of magnet units 4 can be effectively utilized.

[0183] For example, the m groups of magnetic units 4 may include four groups of magnetic units 4. It is understood that the length of the m groups of magnetic units 4 along the first direction may be designed as needed. For example, the length of the m groups of magnetic units 4 in the first direction may be greater than or equal to 9000 micrometers (μm).

[0184] In other embodiments, the magnetic unit 4 may also be composed of a single magnet, and the magnet includes two parts with opposite polarity directions. The length of the magnet in the first direction is k.

[0185] Fig. 9 is a schematic structural diagram of an embodiment of the carrier 2 shown in Fig. 3. Fig. 10 is a schematic structural diagram of a portion of the motor 10 shown in Fig. 3 at another angle.

[0186] As shown in Figures 2, 9, and 10, the carrier 2 can be used to mount the first optical element 204. The carrier 2 includes a carrying surface 21, a bottom surface 22, a first side surface 23, a second side surface 24, and a back surface 25. The carrying surface 21, the bottom surface 112, and the back surface 25 are all connected between the first side surface 23 and the second side surface 24. The carrying surface 21 connects the bottom surface 22 and the back surface 25. The bottom surface 112 connects the back surface 25. The carrying surface 21 can be disposed opposite the bottom surface 22, and the first optical element 204 can be fixed to the carrying surface 21.

[0187] It is understood that the shape of the carrier 2 can be designed based on the shape of the first optical element 204. For example, when the first optical element 204 is a prism, the supporting surface 21 can be inclined to match the shape of the prism. The light-reflecting surface of the prism can be fixed to the supporting surface 21.

[0188] Exemplarily, the carrier 2 may include a first side panel 26 and a second side panel 27, wherein the first side panel 26 and the second side panel 27 are arranged at an angle. The prism may be mounted on the surface of the first side panel 26 on the side away from the second side panel 27. The surface of the first side panel 26 on the side away from the second side panel 27 may be the bearing surface 21 of the carrier 2. The surface of the second side panel 27 on the side away from the first side panel 26 may be a portion of the bottom surface 22 of the carrier 2. It is understood that, compared to a solution in which the entire carrier 2 is located on one side of the prism and there is no overlap in the first direction, this embodiment forms an inclined surface by arranging the first side panel 26 and the second side panel 27 at an angle to match the shape of the prism, thereby effectively utilizing space and reducing the volume of the camera module 100. In addition, the connection area between the prism and the carrier 2 may be set larger, and the connection stability between the prism and the carrier 2 is also better.

[0189] In some embodiments, the carrier 2 further includes a first protrusion 28 and a second protrusion 29, arranged along the second direction. The first side plate 26 and the second side plate 27 are connected between the first protrusion 28 and the second protrusion 29. The first protrusion 28 and the second protrusion 29 can be slidably connected to the base 1 via guide rods. The side surface of the first protrusion 28 facing the bottom plate 11 and the side surface of the second protrusion 29 facing the bottom plate 11 can be part of the bottom surface 22 of the carrier 2. The side surface of the first protrusion 28 facing away from the second protrusion 29 can be the first side surface 23 of the carrier 2, and the side surface of the second protrusion 29 facing away from the first protrusion 28 can be the second side surface 24 of the carrier 2. It will be appreciated that, compared to the solution in which only one side of the carrier 2 is connected to the guide rod, the technical solution of this embodiment provides a sliding connection to the base 1 by providing the first protrusion 28 and the second protrusion 29 connected to both sides of the first side plate 26 and the second side plate 27 via the guide rods. The prism is mounted on the first side plate 26 , and the positions where the carrier 2 is connected to the guide rods are set on both sides of the prism. When the carrier 2 drives the prism to move, the force is more balanced and the movement is more stable, reducing the risk of the carrier 2 shaking.

[0190] In some embodiments, the magnetic sheet 85 can be fixed to the bottom surface 22 of the carrier 2. The magnetic sheet 85 can be made of metal. For example, the magnetic sheet 85 can be fixed to a side surface of the second side plate 27 that is adjacent to the first side plate 26.

[0191] In other embodiments, when the first optical element 204 is a lens assembly, the carrier 2 can be used to mount the lens assembly. The lens assembly can be fixed to the supporting surface 21. In this case, the shape of the carrier 2 can be designed based on the specific shape of the lens assembly, and this application is not limited to the shape of the carrier 2 shown in Figures 9 and 10.

[0192] Fig. 11 is a partial structural diagram of an embodiment of the motor 10 shown in Fig. 3. Fig. 12 is a partial structural diagram of an embodiment of the motor 10 shown in Fig. 3.

[0193] As shown in Figures 11 and 12, n coils 3 can be fixed to the bottom surface 22 of the carrier 2. For example, the n coils 3 can be fixed to a surface of the second side plate 27 away from the first side plate 26. A tunneling magnetoresistance effect (TMR) sensor 83 can be fixed to the second side surface 24 of the carrier 2.

[0194] The second circuit board 7 can be fixed to the carrier 2 and electrically connected to the n coils 3 and the TMR sensor 83. The second circuit board 7 can be used to supply power to the n coils 3 and the TMR sensor 83. For example, the second circuit board 7 can have a portion connected to the bottom surface 22 of the carrier 2, a first portion connected to the back surface 25 of the carrier 2, and a portion connected to the second side surface 24 of the carrier 2.

[0195] In some embodiments, the second circuit board 7 may be a flexible circuit board or a rigid-flexible circuit board.

[0196] Fig. 13 is a partial structural schematic diagram of the motor 10 shown in Fig. 3 at another angle. Fig. 14 is a partial cross-sectional view of an embodiment of the structure shown in Fig. 13 at section line CC.

[0197] As shown in Figures 13 and 14, one end of the electrical connector 5 can be fixed to the base 1 and electrically connected to the first circuit board 6, and the other end can be fixed to the carrier 2 and electrically connected to the second circuit board 7. The electrical connector 5 can electrically connect the coil 3 and the TMR sensor 83 via the second circuit board 7.

[0198] The coil 3 can be fixed to the carrier 2. The m groups of magnet units 4 can be fixed to the base 1. The n coils 3 are arranged facing the m groups of magnet units 4. The plane around which the wires of the coils 3 are wound is the winding plane of the coils 3. The n coils 3 facing the m groups of magnet units 4 means that the winding plane of the coils 3 faces the m groups of magnet units 4. For example, the n coils 3 can be fixed to the bottom surface 22 of the carrier 2, and the m groups of magnet units 4 can be fixed to the bottom plate 11 of the base 1.

[0199] In some embodiments, the motor 10 may further include a magnet housing 49, which may be fixed to the base 1. The m sets of magnet units 4 are mounted in the magnet housing 49. Thus, when installing the m sets of magnet units, the m sets of magnet units 4 may be first mounted in the magnet housing 49 to form a whole, and then the whole may be mounted on the base 1.

[0200] In other embodiments, the n coils 3 may also be fixed to the first side surface 23 or the second side surface 24 of the carrier 2. Correspondingly, the m groups of magnet units 4 may also be fixed to the first side wall 12 or the second side wall 13 of the base 1, so that the n coils 3 are arranged facing the m groups of magnet units 4.

[0201] In other embodiments, the motor 10 may include 2n coils and 2m sets of magnet units. The n coils 3 may be fixed to the first side 23 of the carrier 2, and the m sets of magnet units may be fixed to the first side wall 12 of the base 1, facing the coils 3 fixed to the first side 23. The n coils 3 may be fixed to the second side 24 of the carrier 2, and the m sets of magnet units may be fixed to the second side wall 13 of the base 1, facing the coils 3 fixed to the second side 24.

[0202] Figure 15 is an assembly diagram of an embodiment of the structure shown in Figure 14. Figure 16 is a structural diagram of an embodiment of the structure shown in Figure 15 at the section line DD. The following describes the movement of n coils 3 under the action of a magnetic field after being energized, in conjunction with the accompanying drawings. For ease of description and understanding, Figure 15 uses dotted lines to indicate the positions of n coils 3 after moving a distance B in the first direction. Figure 16 uses arrows to indicate the polarity directions of the first magnet 41, the second magnet 42, the third magnet 43, and the fourth magnet 44. The arrows combined with the curves indicate the approximate distribution and direction of the magnetic field lines. According to the principle of fork in and point out in physics, the direction of the current in the coil 3 is indicated by "·" and "ⅹ". Among them, "·" indicates that the direction of the current is perpendicular to the cross section and outward, and "ⅹ" indicates that the direction of the current is perpendicular to the cross section and inward.

[0203] As shown in Figures 15 and 16, the n coils 3 may include a first coil 31, a second coil 32, and a third coil 33. The first coil 31, the second coil 32, and the third coil 33 are spaced apart and insulated along the first direction. The magnet array 9 includes four sets of magnet units 4 and supplementary magnets 91. The magnet units 4 may include a first magnet 41, a second magnet 42, a third magnet 43, and a fourth magnet 44.

[0204] The m groups of magnet units 4 form a magnetic field whose magnitude and direction change periodically in the first direction. For example, the period of change of the magnetic field can be k, where k is the length of the magnet unit 4 in the first direction. The magnetic field changes direction every 0.5k.

[0205] Figure 17 is a schematic diagram of an embodiment of the magnitude and direction of the force applied to the first coil 31 shown in Figure 15 when it moves in the first direction while the direction of the current remains unchanged. It can be understood that, in the coordinate system, the horizontal axis represents the displacement of the first coil 31 in the first direction, and the displacement of the first coil 31 can refer to the distance between the position of the first coil 31 along the first direction and the initial position. The initial position of the first coil 31 refers to the position of the first coil 31 before power is applied to the first coil 31. The vertical axis represents the magnitude and direction of the force applied to the first coil 31. The positive and negative values ​​of the vertical axis represent the direction of the force, and the absolute value of the vertical axis represents the magnitude of the force.

[0206] As shown in Figures 15 to 17, when the direction of the current remains unchanged, the magnitude and direction of the force applied to the first coil 31 in the first direction changes periodically with the displacement. The period of the force applied can be k, where k is the length of the magnet unit 4 in the first direction. The interval between two changes in the direction of the force applied is 0.5k. It can be understood that, according to the analysis of Figure 17, the direction of the current can be changed so that the force applied to the n coils after energization is always positive or negative, that is, the force applied to the n coils 3 is always in the same direction. For example, an alternating current can be applied to the n coils 3, and the direction of the alternating current changes with the displacement of the n coils 3 in the first direction. In this way, the direction of the current in the coils 3 can change in accordance with the direction of the magnetic field, so that the force applied to the coils 3 in the magnetic field is always in the same direction. After the alternating current is applied to the n coils, they can cooperate with the magnetic field of the m groups of magnet units 4 to move in the first direction, thereby driving the carrier 2 to move relative to the base 1 in the first direction.

[0207] It is understandable that when the carrier 2 needs to drive the first optical element 204 to move along the optical axis direction of the camera module 100, the first direction can be set to a direction parallel to the optical axis. In this way, the coil 3 can move along the carrier 2 in a direction parallel to the optical axis of the camera module 100. It is understandable that the movement of the carrier 2 along the first direction includes two directions, forward and backward. When the carrier 2 moves forward, the distance between the light-emitting surface 241 of the prism carried on the carrier 2 (as shown in Figure 2) and the imaging surface decreases. When the carrier 2 moves backward, the distance between the light-emitting surface 241 of the prism carried on the carrier 2 and the imaging surface increases.

[0208] As shown in Figure 17, when the direction of the current flowing through the first coil 31 remains unchanged, the direction of the force acting on the first coil 31 at this time can reflect the strength and direction of the magnetic field at the location of the first coil 31. It can be understood that the first coil 31 is subjected to the NS magnetic field formed by multiple magnet units 4 in the m groups of magnet units 4. The magnetic field strength and direction at the location of the first coil 31 are indicative of the total magnetic field strength and direction under the action of multiple magnetic fields. The force acting on the first coil 31 is also indicative of the combined force under the action of multiple NS magnetic fields.

[0209] When n coils 3 are energized and move in a first direction, they cut through the magnetic field lines in the magnetic field of the m groups of magnet units 4, causing the n coils 3 to be subjected to the Ampere force. During the movement of the n coils 3, the direction of the Ampere force acting on the n coils 3 is influenced by both the direction of the current flowing through the first coil 31 and the direction of the magnetic field at the location of the first coil 31 at that moment. To ensure that the Ampere force acting on the coils 3 is directed in a predetermined direction, the direction of the current flowing through the n coils 3 can be adjusted based on the magnetic field distribution at different locations during the movement of the coils 3 in the first direction.

[0210] The following uses the first coil 31 as an example to describe the coordination between the current and the magnetic field when n coils 3 move. It is understandable that Figures 17 and 18 illustrate the partial displacement and force of the first coil 31 in the magnetic field.

[0211] Figure 18 is a schematic diagram of one embodiment of the current and force applied to the first coil 31 shown in Figure 16 when it moves. Within the coordinate system, the horizontal axis represents the displacement of the first coil 31. The horizontal straight line represents the current in the first coil 31, and the positive or negative sign of the vertical axis represents the direction of the current in the first coil 31. The absolute value of the vertical axis represents the magnitude of the current in the first coil 31. The curved line represents the force applied to the first coil 31. The positive or negative sign of the vertical axis represents the direction of the force applied to the first coil 31. The absolute value of the vertical axis represents the magnitude of the force applied to the first coil 31.

[0212] As shown in Figures 17 and 18, when the direction of the magnetic field at the location of the first coil 31 is negative, a corresponding negative current is passed through the first coil 31, causing the force on the first coil 31 to be in the positive direction. When the direction of the magnetic field at the location of the first coil 31 is positive, a corresponding positive current is passed through the first coil 31, causing the force on the first coil 31 to be in the positive direction.

[0213] It is understood that during the movement of the first coil 31, a current whose direction changes with displacement is passed through the first coil 31, so that the Ampere force acting on the first coil 31 remains positive. The direction of the Ampere force in this case can be the forward direction of the carrier 2. In this way, by changing the direction of the current in the first coil 31, the force acting on the first coil 31 can be directed in the forward direction. In other embodiments, the direction of the current in the first coil 31 can also be changed so that the Ampere force acting on the first coil 31 is negative, so that the force acting on the first coil 31 is directed in the backward direction.

[0214] For example, when the first coil 31 moves 0.5k in the first direction, the current direction changes. It is understood that the magnetic field of the m groups of magnet units 4 changes direction every 0.5k in the first direction, causing the current to change direction every 0.5k. The current direction can match the changing pattern of the magnetic field direction, ensuring that the force applied to the first coil 31 remains in the same direction.

[0215] The way the second coil 32 and the third coil 33 are powered and the force they are subjected to when moving in the magnet array 9 can be compared to that of the first coil 31. By adjusting the direction of the current in the second coil 32 and the third coil 33, the direction of the Ampere force on the second coil 32 and the third coil 33 can always be in the same direction. It can be understood that at the same moment, the direction of the Ampere force on the first coil 31, the second coil 32 and the third coil 33 are the same. In this way, in the process of the first coil 31, the second coil 32 and the third coil 33 driving the carrier 2 to move, the Ampere forces on the first coil 31, the second coil 32 and the third coil 33 will not cancel each other out, and the efficiency of the motor 10 is higher.

[0216] As shown in Figure 15 , the distance A between the centerlines of two adjacent coils 3 in the first direction satisfies the following equation: nA = jk, where j is a positive integer. The centerlines of the coils 3 are parallel to the winding plane of the coils 3 and perpendicular to the first direction. It is understood that by setting nA = jk, that is, nA is an integer multiple of the length of the magnetic unit 4 in the first direction, m groups of magnetic units 4 form a magnetic field whose magnitude and direction periodically vary in the first direction. The period of variation of the magnetic field can be k. After n coils 3 are translated by nA in the first direction, the magnetic field strength and direction of the n coils 3 before and after the nA movement can be the same. If the magnitude and direction of the current in the n coils 3 before and after the movement are set to be the same, the magnitude and direction of the Ampere force acting on the n coils 3 can also be the same. An alternating current with a period of nA can be applied to the n coils 3, so that when the n coils 3 move in the first direction, the n coils 3 can continuously move in the first direction under the combined effect of the alternating current with a period of nA and the magnetic field of the m groups of magnetic units 4. Furthermore, when designing alternating current, it is sufficient to design the direction of the current for a period of nA, without having to design the current for the n coils 3 to move all the distances along the first direction, thereby reducing the design difficulty.

[0217] Exemplarily, the n coils 3 include a first coil 31, a second coil 32, and a third coil 33, where n = 3. FIG15 illustrates the first coil 31, the second coil 32, and the third coil 33 at a first moment using solid lines. FIG15 illustrates the first coil 31, the second coil 32, and the third coil 33 at a second moment using dashed lines. Along the first direction, the spacing B between the first position Q1 and the second position Q2 is 3A = 2k.

[0218] As shown in Figures 15 to 17, the direction of the magnetic field of the first coil 31 at the first position Q1 is the same as the direction of the magnetic field at the second position Q2. The magnetic field strength of the first coil 31 at the first position Q1 is the same as the magnetic field strength at the second position Q2. In this way, at the first position Q1 and the second position Q2, the magnitude and direction of the current on the first coil 31 can be set to be the same, and the magnitude and direction of the Ampere force on the first coil 31 can also be the same. During the movement of the first coil 31, the magnitude and direction of the current on the first coil 31 can change with the displacement, and the period of the current on the first coil 31 can be equal to the length k of a group of magnet units 4. In this way, passing a periodic current through the first coil 31 is conducive to the first coil 31 achieving long-distance movement.

[0219] In some embodiments, the length of the m groups of magnet units 4 in the first direction may be greater than or equal to 9000 micrometers (μm). In this way, the n coils 3 can drive the carrier 2 to move a large distance relative to the base 1 along the first direction.

[0220] In some embodiments, the length of the coil 3 in the first direction is greater than 0.5k and less than k. It is understood that, taking the first coil 31 as an example, as shown in FIG16 , when the first coil 31 moves in a magnetic field, the two straight sections 311 on either side of the first coil 31 are subjected to forces. The length of the first coil 31 in the first direction is greater than 0.5k. The two straight sections 311 on either side of the first coil 31 can be located within two adjacent magnetic fields. When a positive current flows through the first coil 31, the straight section 311 on the left side of the first coil 31 can be subjected to forces directed toward the right under the action of the first magnetic field. The straight section 311 on the left side of the first coil 31 can also be subjected to forces directed toward the right under the action of the second magnetic field. This prevents the straight sections 311 on either side of the first coil 31 from being in the same magnetic field direction, resulting in opposite forces on the two straight sections 311, which cancel each other out and reduce the operating efficiency of the first coil 31. The length of the first coil 31 in the first direction is less than k to prevent the first coil 31 from crossing three or more magnetic fields, which would result in the magnetic field between the two straight sections 311 on either side of the first coil 31 being ineffective. The length of the first coil 31 in the first direction is less than k, and the first coil 31 requires a smaller installation space, which is beneficial to reducing the volume of the motor.

[0221] It can be understood that the n coils 3 are in different positions in the magnetic field of the m groups of magnet units 4 at a certain moment, the magnetic field directions and intensities of the n coils 3 at their respective positions may also be different, and the currents passed through the n coils 3 may have a phase difference, so that when the n coils move along the first direction, the forces acting on the n coils are all in one direction.

[0222] The following will describe the energization and force conditions of the n coils 3 when the n coils 3 and the m groups of magnet units move in the first direction with reference to the accompanying drawings.

[0223] Figures 19 to 26 are schematic diagrams illustrating the relative positions of n coils 3 and a magnet array 9 at different times in one embodiment. The n coils 3 include a first coil 31, a second coil 32, and a third coil 33. The magnet array 9 includes five groups of magnet units 4. Each magnet unit 4 includes a first magnet 41 and a second magnet 42. It will be appreciated that Figures 19 to 26 illustrate the same structure. For simplicity, the individual structures are labeled in Figure 19, while the structures in Figures 20 to 26 are not numbered.

[0224] As shown in Figures 19 to 26, the n coils 3 move from the position shown in Figure 19 to the position shown in Figure 20, moving 0.25A in the first direction. The n coils 3 move from the position shown in Figure 20 to the position shown in Figure 21, moving 0.5A in the first direction. The n coils 3 move from the position shown in Figure 21 to the position shown in Figure 22, moving 0.5A in the first direction. The n coils 3 move from the position shown in Figure 22 to the position shown in Figure 23, moving 0.5A in the first direction. The n coils 3 move from the position shown in Figure 23 to the position shown in Figure 24, moving 0.5A in the first direction. The n coils 3 move from the position shown in Figure 24 to the position shown in Figure 25, moving 0.5A in the first direction. The n coils 3 move from the position shown in Figure 25 to the position shown in Figure 26, moving 0.25A in the first direction.

[0225] The movement of n coils 3 from the position shown in Figure 19 to the position shown in Figure 26 represents a total movement of 3A in the first direction. The first coil 31 passes through two sets of magnet units 4, where 3A = 2k. For example, the distance A between the centerlines of adjacent coils 3 is 2.5 mm. The width of a set of magnet units 4 is k = 3.75 mm. The length of the first magnet 41 in the first direction is equal to the length of the second magnet 42 in the first direction. The length of the first magnet 41 in the first direction is 0.5k = 0.75A = 1.875 mm.

[0226] Figure 27 is a schematic diagram of the power supply of one embodiment of the first coil 31, second coil 32, and third coil 33 during the movement process shown in Figures 19 to 26. From top to bottom, the first coordinate system represents the current in the first coil 31, the second coordinate system represents the current in the second coil 32, and the third coordinate system represents the current in the third coil 33. The horizontal axis represents the displacement of the coil 3 along the first direction. The positive or negative value of the vertical axis represents the direction of the current. The absolute value of the vertical axis represents the magnitude of the current.

[0227] As shown in Figure 27, the current in any of the n coils 3 changes direction every 0.5k. For example, taking the first coil 31 as an example, at the abscissa of 0.9375mm, the current in the first coil 31 changes from negative to positive, and the current in the first coil 31 reverses direction. At the abscissa of 2.8125mm, the current in the first coil 31 changes from positive to negative, and the current in the first coil 31 reverses direction again. The interval between the two reversals is 1.875mm = 0.5k.

[0228] Figure 28 is a schematic diagram illustrating one embodiment of the relationship between displacement and force for n coils 3 under the energization scheme shown in Figure 27. In Figure 28, different types of lines are used to distinguish the Ampere force (force 1) on the first coil 31, the Ampere force (force 2) on the second coil 32, the Ampere force (force 3) on the third coil 33, and the resultant force (three-phase resultant force). The position of the first coil shown in Figure 19 corresponds to the horizontal axis of 0 mm in Figure 28.

[0229] As shown in Figure 28, after power is applied, the Ampere force on the first coil 31 varies periodically with displacement, the Ampere force on the second coil 32 varies periodically with displacement, and the Ampere force on the third coil 33 varies periodically with displacement. Taking the first coil 31 as an example, during movement in the first direction, the period X of the Ampere force variation on the first coil 31 is 1.875 mm = 0.5 k.

[0230] As shown in Figures 27 and 28, the phase difference between the currents of n coils 3 is 360° / n. For example, among the first coil 31, the second coil 32, and the third coil 33, the phase difference between the currents of two coils is 360° / 3=120°. 360° can be the displacement X (X is 1.875) required to represent a cycle change in the force of the coil 3. For example, in Figure 27, the phase difference between the currents of the first coil 31 and the third coil 33 is 0.625mm. The phase difference between the second coil 32 and the third coil 33 is 0.625mm.

[0231] FIG29 is a schematic diagram of another embodiment of the power-on process of the first coil 31 , the second coil 32 and the third coil 33 during the movement process as shown in FIG19 to FIG26 .

[0232] As shown in Figures 28 and 29, the n coils 3 include first-type coils and second-type coils. The first-type coil is the coil with the lowest magnetic field strength at a specific moment in the n coils 3. The second-type coil is the coil other than the first-type coil among the n coils 3. The first-type coil is de-energized, while the second-type coil is energized. The magnetic field strength at the location of the second-type coil is greater than the magnetic field strength at the location of the first-type coil. It is understandable that when the current flowing through the n coils 3 remains unchanged, the coil 3 located at the location with greater magnetic field strength is subjected to greater force. Therefore, the second-type coil, which is subjected to greater force, is energized and the first-type coil, which has lower efficiency, is de-energized, which helps reduce the power consumption of the motor 10.

[0233] It is understandable that when the n coils 3 move along the first direction, there is a coil among the n coils 3 at any time whose magnetic field strength is the lowest. This coil is not a fixed coil but is determined according to the respective positions of the n coils.

[0234] Exemplarily, n coils 3 include a first coil 31, a second coil 32, and a third coil 33. As shown in FIG28 , within the range of the horizontal coordinate greater than 0 mm and less than 0.625 mm, the Ampere force of the second coil 32 is smaller than that of the first coil 31, and the Ampere force of the second coil 32 is smaller than that of the third coil 33. This indicates that the magnetic field intensity at the locations of the first coil 31 and the third coil 33 is greater than the magnetic field intensity at the location of the second coil 32. The second coil 32 is a first-type coil. The first coil 31 and the third coil 33 are second-type coils. The second coil 32 can be de-energized within the range of the horizontal coordinate greater than 0 mm and less than 0.625 mm.

[0235] When two of the first coil 31, the second coil 32, and the third coil 33 are first-type coils and the other is a second-type coil. Within one force cycle, the ratio of the displacement of each coil 3 when energized to its displacement when de-energized is 2:1. For example, the ratio of the displacement of the first coil 31 when energized in the first direction to its displacement when de-energized is 2:1. For example, a force cycle of the first coil 31 ranges from 0 mm to 1.875 mm. The first coil 31 is energized during a displacement of 0 mm to 0.625 mm. The first coil 31 is de-energized during a displacement of 0.625 mm to 1.25 mm. The first coil 31 is energized during a displacement of 1.25 mm to 1.875 mm. The displacement of the first coil 31 when energized is 1.25 mm, and the displacement of the first coil 31 when de-energized is 0.625 mm, with the ratio of 1.25 mm to 0.625 mm being 2:1.

[0236] And / or, the ratio of the displacement of the second coil 32 when energized in the first direction to that when de-energized is 2:1. And / or, the ratio of the displacement of the third coil 33 when energized in the first direction to that when de-energized is 2:1.

[0237] In some embodiments, the phase difference of the currents of n coils 3 is 360° / n. For example, when one coil 3 among the n coils 3 is de-energized and the remaining coils 3 are energized, the phase difference of the currents of two coils among the first coil 31, the second coil 32, and the third coil 33 satisfies 360° / 3=120°. 360° can be the displacement X (X is 1.875) required to represent a cycle change in the force of the coil 3. The phase difference ΔT of the currents of the first coil 31, the second coil 32, and the third coil 33 can be X / 3=1.875mm / 3=0.625mm. For example, the phase difference of the currents on the first coil 31 and the third coil 33 is 0.625mm. The phase difference between the second coil 32 and the third coil 33 is 0.625mm.

[0238] In other embodiments, at any position, any one of the first coil 31 , the second coil 32 and the third coil 33 may be energized, while the remaining two coils are not energized.

[0239] Figure 30 is a schematic diagram of another embodiment of the current flowing through the coil 3. Figure 31 is a schematic diagram of yet another embodiment of the current flowing through the coil 3.

[0240] It is understood that in the above embodiments, the current of coil 3 is described as a square current, which means that the current magnitude remains constant but the direction changes periodically. In other embodiments, the current of coil 3 can also be a sinusoidal current (as shown in Figure 30) or a triangular wave current (as shown in Figure 31).

[0241] FIG32 is a schematic assembly diagram of another embodiment of the coil 3 and the magnet unit 4 shown in FIG14 .

[0242] As shown in Figure 32, m magnet units 4 constitute a magnet array 9. The motor 10 may include multiple magnet arrays 9, and the multiple magnet arrays 9 may be arranged along the second direction. Figure 32 illustrates two magnet arrays 9. Along the second direction, the length of the coil 3 is greater than the length of the magnet.

[0243] FIG33 is a schematic assembly diagram of yet another embodiment of the coil 3 and magnet unit 4 shown in FIG14 .

[0244] As shown in FIG33 , the motor 10 may include multiple magnet arrays 9, which may be arranged along the second direction. FIG32 illustrates two magnet arrays 9. N coils 3 form a coil group 34 along the first direction. The motor 10 may include multiple coil groups 34. Multiple coil groups 34 are arranged along the second direction. FIG32 illustrates two coil groups 34. The two coil groups 34 and the two magnet arrays 9 are arranged relative to each other in a one-to-one correspondence along the second direction.

[0245] FIG34 is a schematic assembly diagram of another embodiment of the coil 3 and the magnet unit 4 shown in FIG14 .

[0246] As shown in FIG34 , n coils 3 constitute a coil group 34 . The motor 10 may include multiple coil groups 34 . The multiple coil groups 34 are arranged along the second direction. FIG32 illustrates two coil groups 34 . The two coil groups 34 are arranged opposite to the magnet array 9 .

[0247] It is understandable that the motor 10 further includes a plurality of magnet arrays 9 and / or a plurality of coil groups 34 , and the specific number and corresponding relationship can be designed according to requirements.

[0248] Several embodiments of the electrical connector 5 are described below with reference to the accompanying drawings.

[0249] As shown in FIG13 , one end of the electrical connector 5 can be fixed to the base 1 and electrically connected to the first circuit board 6, and the other end can be fixed to the carrier 2 and electrically connected to the second circuit board 7. The electrical connector 5 can electrically connect the coil 3 and the TMR sensor 83 via the second circuit board 7. Hereinafter, the end of the electrical connector 5 electrically connected to the first circuit board 6 is referred to as the first end 51, and the end electrically connected to the second circuit board 7 is referred to as the second end 52.

[0250] The electrical connector 5 may be deformable. When the n coils 3 drive the carrier 2 to move in the first direction, the electrical connector 5 may be deformed, thereby supplying power to the coils 3 during the movement.

[0251] In some embodiments, the first end 51 of the electrical connector 5 can be fixed to the second side wall 13 of the base 1. In other embodiments, the first end 51 of the electrical connector 5 can also be fixed to the first side wall 12 of the base 1. Alternatively, the first end 51 of the electrical connector 5 can be partially located between the second supporting portion and the third supporting portion to electrically connect to the first circuit board 6 and fixed to the bottom plate 11 of the base 1.

[0252] In some embodiments, the first end 51 of the electrical connector 5 can be electrically connected to the first circuit board 6 by soldering. In other embodiments, the first end 51 of the electrical connector 5 can also be electrically connected to the first circuit board 6 by ball grid array (BGA) soldering.

[0253] For example, the second end 52 of the electrical connector 5 can be fixed to the back surface 25 of the carrier 2. In other embodiments, the second end 52 of the electrical connector 5 can also be fixed to the first side surface 23 or the second side surface 24 of the carrier 2. It is understood that when the second end 52 of the electrical connector 5 is fixed to the first side surface 23 or the second side surface 24 of the carrier 2, the position of the second circuit board 7 can be adjusted accordingly.

[0254] In some embodiments, the second end 52 of the electrical connector 5 can be electrically connected to the second circuit board 7 by soldering. In other embodiments, the second end 52 of the electrical connector 5 can also be electrically connected to the second circuit board 7 by BGA soldering.

[0255] Exemplarily, the electrical connector 5 may further include an extension portion 53, which is connected between the first end 51 and the second end 52 and electrically connects the first section and the second end 52. The extension portion 53 may be arranged opposite to the back surface 25 of the carrier 2. The length of the extension portion 53 may be greater than the distance between the first end 51 and the second end 52. The extension portion 53 may be used to extend the length of the electrical connector 5 and reduce the K value of the electrical connector 5. As shown in Figures 13 and 14, when the coil 3 drives the carrier 2 to move along the first direction, the extension portion 53 may be stretched and deformed to prevent the electrical connector 5 from falling off the carrier 2 due to the long movement path of the carrier 2, resulting in power outage between the carrier 2 and the second circuit board 7, and then the coil 3 is powered off, affecting the operation of the motor 10. It can be understood that by providing the extension portion 53, the K value of the electrical connector 5 can be reduced, so that the reliability of the electrical connection between the electrical connector 5 and the second circuit board 7 is better.

[0256] In some embodiments, the K value of the electrical connector 5 is less than 10 millinewton per millimeter (mN / mm). It is understood that by setting the K value of the electrical connector 5 within a smaller range, when the carrier 2 moves in the first direction, the electrical connector 5 will have less obstruction to the movement of the carrier 2, and the motor 10 will consume less power.

[0257] FIG35 is a schematic structural diagram of another embodiment of the electrical connector 5 shown in FIG13 .

[0258] In some embodiments, the extension portion 53 may have a spiral structure (as shown in FIG13 ) or a broken line structure (as shown in FIG35 ). The spiral structure or broken line structure can be used to extend the length of the extension portion 53 and reduce the K value of the electrical connector 5 . The shape of the extension portion 53 can be designed according to actual needs and is not limited in this application.

[0259] In some embodiments, the broken line structure of the extension portion 53 may include, but is not limited to, a continuous "S" structure, a continuous "V" structure, a continuous "M" structure, a continuous "N" structure, a continuous "W" structure, and the like.

[0260] FIG36 a is a schematic structural diagram of another embodiment of the electrical connector 5 shown in FIG13 .

[0261] In some embodiments, the extension portion 53 may have a single-line structure as shown in FIG13 , or a multi-line structure as shown in FIG36 a . As shown in FIG36 a , the extension portion 53 may include multiple signal transmission structures 531 , with the multiple signal transmission structures 531 spaced apart from each other. It is understood that the multiple signal transmission structures included in the extension portion 53 are not limited to the two shown in FIG36 a , but may be more than two, and this application does not impose any limitation thereto.

[0262] In some embodiments, the extension 53 may be a trace suspension assembly (TSA). One end of the TSA is fixed to the base 1 and electrically connected to the first circuit board 6, while the other end is fixed to the carrier 2 and electrically connected to the coil 3. The TSA is elastic. In other embodiments, the extension 53 may also be a spring or a flexible circuit board.

[0263] Figure 36b is a partial structural diagram of yet another embodiment of the electrical connector 5 shown in Figure 13. Figure 36c is a partial cross-sectional view of an embodiment of the extension portion 53 shown in Figure 36b taken along section line JJ.

[0264] As shown in Figures 36b and 36c, the extension portion 53 may be layered along the thickness direction of the extension portion 53, and may include a plurality of spaced-apart layer structures. For example, the extension portion 53 may include a first layer 351, a second layer 352, and a third layer 353. The first layer 351, the second layer 352, and the third layer 353 may be spaced-apart along the thickness direction of the extension portion 53.

[0265] For example, the first layer 351 may include a first insulating layer 3511 and a first trace 3512. The first trace 3512 may be embedded within the first insulating layer 3511. The second layer 352 may include a second insulating layer 3521 and a second trace 3522. The second trace 3522 may be embedded within the second insulating layer 3521. The third layer 353 may include a third insulating layer 3531 and a third trace 3532. The third trace 3532 may be embedded within the third insulating layer 3531. The first trace 3512, the second trace 3522, and the third trace 3532 are used to transmit electrical signals. For example, the first trace 3512, the second trace 3522, and the third trace 3532 may be used to supply power to the coil 3 (as shown in FIG. 4 ) and the TMR sensor 83 (as shown in FIG. 4 ) and transmit electrical signals. The first insulating layer 3511 provides insulation and protection for the first trace 3512. The second insulating layer 3521 is used to insulate and protect the second wiring 3522. The third insulating layer 3531 is used to insulate and protect the third wiring 3532.

[0266] For example, the first insulating layer 3511 can be made of an organic insulating material such as polyimide (PI). The first trace 3512 can be made of a metallic conductive material such as copper. It is understood that the configuration of the second insulating layer 3521 and the second trace 3522 can refer to the configuration of the first insulating layer 3511 and the first trace 3512. The configuration of the third insulating layer 3531 and the third trace 3532 can refer to the configuration of the first insulating layer 3511 and the first trace 3512. This will not be further described here.

[0267] For example, the number of first traces 3512 included in the first layer 351, the number of second traces 3522 included in the second layer 352, and the number of third traces 3532 included in the third layer 353 may be equal or unequal, and the number of traces in each layer may be set according to requirements.

[0268] For example, the calculation formula of K value is as follows:

[0269] Where E is constant, W is width, T is thickness, and L is length.

[0270] It can be understood that when the length and width remain unchanged, the K value is proportional to the cube of the thickness.

[0271] For example, the thickness of the extension portion 53 before layering can be 4.5 mm. After layering, the thickness D1 of the first layer 351 can be 1.7 mm, the thickness D2 of the second layer 352 can be 1.7 mm, and the thickness D3 of the third layer 353 can be 1.7 mm. The total thickness of the extension portion 53 after layering is slightly greater than the thickness before layering to ensure that the insulation layer provides reliable insulation protection for the wiring.

[0272] For example, before the extension portion 53 is layered: K = a(4.5) 3 =91.125a, after stratification: K=K1+K1+K3=a(1.7) 3 +a(1.7) 3 +a(1.7) 3 =14.739a. Among them,

[0273] Obviously, after the extension part 53 is layered, although the sum of the thickness of the first layer 351, the thickness of the second layer 352 and the thickness of the third layer 353 of the extension part 53 is slightly greater than the thickness of the extension part 53 between layers, the K value of the extension part 53 after layering is significantly reduced.

[0274] It can be understood that compared with the solution in which the first layer 351, the second layer 352 and the third layer 353 are connected to each other, dividing the extension portion 53 into multiple spaced layers can significantly reduce the K value of the electrical connector 5, which is beneficial to reducing the degree of obstruction of the electrical connector 5 to the movement of the carrier 2 when the carrier 2 moves along the first direction, and is beneficial to reducing the power consumption of the motor 10.

[0275] For example, the K value of the electrical connector 5 may be 0.1 mN / mm, 0.2 mN / mm, 0.5 mN / mm, 0.8 mN / mm, 1.2 mN / mm, 1.5 mN / mm, 2 mN / mm, etc.

[0276] In other embodiments, the extension portion 53 may also be divided into two layers, or three or more layers, and is not limited to the three layers shown in FIG. 36 b .

[0277] In other embodiments, the extension portion 53 may be partially layered and partially unlayered along the length direction. For example, the extension portion 53 may be provided with a connecting structure (not shown), wherein a portion of the connecting structure may be fixed between the first layer 351 and the second layer 352 and a portion of the connecting structure may be fixed between the second layer 352 and the third layer 353.

[0278] FIG37 is a partial cross-sectional view of one embodiment of the structure shown in FIG13 at section line EE.

[0279] As shown in FIG37 , a metal magnetic sheet 85 can be fixed to the bottom surface 22 of the carrier 2 and positioned opposite the magnet unit 4. Thus, in the X-direction, there is an attractive force between the magnetic sheet 85 and the magnet unit 4, which can limit the position of the carrier 2 in the X-axis direction.

[0280] In some embodiments, the magnetic sheet 85 can be a disc or annular structure. The thickness direction of the magnetic sheet 85 is set to be parallel to the X-axis direction. In this way, excessive interference force in the non-active direction between the magnetic sheet 85 and the magnet unit 4 can be avoided. The active direction refers to the direction in which the magnetic sheet 85 is directed toward the magnet unit 4.

[0281] Fig. 38 is a partial structural schematic diagram of an embodiment of the motor 10 shown in Fig. 3 at another angle. Fig. 39 is a cross-sectional schematic diagram of an embodiment of the motor 10 shown in Fig. 38 at section line FF.

[0282] As shown in Figures 38 and 39, the carrier 2 is slidably connected to the first guide rod 81 and the second guide rod 82. The length direction of the first guide rod 81 and the length direction of the second guide rod 82 can be parallel to the first direction. It can be understood that by setting the length direction of the first guide rod 81 and the length direction of the second guide rod 82 to be parallel to the first direction, when the carrier 2 moves in the first direction, the first guide rod 81 and the second guide rod 82 can provide support and guide the movement direction of the carrier 2, thereby preventing misalignment of the carrier 2 during movement and ensuring rapid and stable movement of the carrier 2.

[0283] It is understandable that, due to assembly tolerance or manufacturing accuracy, in actual products, the length direction of the first guide rod 81 and the first direction are allowed to have an angle within 10°.

[0284] For example, the bottom surface 22 of the carrier 2 may be provided with a first slide groove 221 and a second slide groove 222. The first slide groove 221 and the second slide groove 222 are spaced apart. The first guide rod 81 is slidably connected within the first slide groove 221, and the second guide rod 82 is slidably connected within the second slide groove 222. The first slide groove 221 and the second slide groove 222 may serve as positioning structures for the first guide rod 81 and the second guide rod 82, facilitating rapid positioning and installation between the carrier 2 and the first guide rod 81 and the second guide rod 82.

[0285] For example, the first slide groove 221 may be located on the first protrusion 28. The second slide groove 222 may be located on the second protrusion 29. The first protrusion 28 is slidably connected to the base 1 via the first guide rod 81. The second protrusion 29 is slidably connected to the base 1 via the second guide rod 82.

[0286] In some embodiments, the first slide groove 221 may include a "V"-shaped structure 2211, and the first guide rod 81 may be slidably connected within the "V"-shaped structure 2211. The first guide rod 81 and the "V"-shaped structure 2211 have two contact points in the Y-axis direction. During the assembly process of the carrier 2 and the first guide rod 81 and the second guide rod 82, the carrier 2 can be quickly positioned in the Y-axis direction. When the actual product size of the first guide rod 81 is slightly larger than the designed size due to tolerance, the first guide rod 81 can still be assembled within the "V"-shaped structure 2211. The "V"-shaped structure 2211 can also be used for tolerance.

[0287] In some embodiments, the second chute 222 includes a U-shaped structure 2212, and the second guide rod 82 is slidably connected within the U-shaped structure 2212. In some embodiments, the width of the U-shaped structure 2212 in the Y-axis direction can be greater than the width of the second guide rod 82. This allows for a certain degree of production error in the carrier 2, ensuring that if the size of the carrier 2 is slightly larger or smaller due to production error, the carrier 2 can successfully slide and connect to the first guide rod 81 and the second guide rod 82. The provision of the U-shaped structure 2212 can improve the error tolerance rate and help save production costs.

[0288] FIG40 is a schematic cross-sectional view of an embodiment of the motor 10 shown in FIG38 at section line GG.

[0289] As shown in Figures 38 to 40, there are two "V"-shaped structures 2211, and the positions of the "V"-shaped structures 2211 are P1 and P2 respectively. For example, the middle part of the first chute 221 can be recessed to form a first avoidance groove 2213, and the first guide rod 81 can be spaced apart from the wall of the first avoidance groove 2213. This forms two "V"-shaped structures 2211 located at both ends of the avoidance groove. It can be understood that the two ends of the first guide rod 81 are in contact with the "V"-shaped structure 2211 (as shown in Figure 20), and the other places are not in contact with the first chute 221, thereby preventing the problem of the carrier 2 being not smooth and having poor stability during movement due to excessive contact area and friction between the carrier 2 and the first guide rod 81. At the same time, it also avoids the problem of poor flatness of the contact surface between the carrier 2 and the first guide rod 81, which leads to poor stability of the carrier 2 during movement.

[0290] FIG41 is a schematic cross-sectional view of an embodiment of the motor 10 shown in FIG38 at section line HH.

[0291] As shown in Figures 38, 39, and 41, there is only one "U"-shaped structure 2212, and the position of the "U"-shaped structure 2212 is P3. For example, the ends of the second chute 222 can be recessed to form a second avoidance groove 2221 and a third avoidance groove 2222. The second guide rod 82 can be spaced apart from the walls of the second avoidance groove 2221 and the walls of the third avoidance groove 2222. The second avoidance groove 2221 and the third avoidance groove 2222 can be located at either end of the "U"-shaped structure 2212. It is understood that the middle portion of the second guide rod 82 contacts the "U"-shaped structure 2212, while the rest of the second guide rod 82 does not contact the second chute 222. This prevents the carrier 2 from moving unsteadily or poorly due to excessive contact area and friction between the carrier 2 and the second guide rod 82. It also avoids the problem of poor flatness of the contact surface between the carrier 2 and the second guide rod 82, which can lead to poor stability during movement.

[0292] As shown in Figure 38, a "U"-shaped structure 2212 (at position P1 in Figure 38) and two "V"-shaped structures 2211 (at positions P2 and P3 in Figure 38) can be connected in sequence to form a triangle. In other words, the three connection positions of the carrier 2 and the first guide rod 81 and the second guide rod 82 can be connected in sequence to form a triangle. The projection of the center O of the carrier 2 on the plane where the triangle is located can coincide with the triangle. In this way, a three-point connection is formed between the carrier 2 and the first guide rod 81 and the second guide rod 82, which can reduce the risk of the carrier 2 shaking during movement.

[0293] As shown in Figure 38 , a buffer member 86 is fixed to the base 1. The buffer member 86 and the carrier 2 are arranged relative to each other along a first direction. The buffer member 86 is flexible. Therefore, when the carrier 2 moves along the first direction or collides with the base 1 during reliability testing, the buffer member 86 can absorb the deformation impact energy, reducing the damage caused by the collision to the carrier 2. The material of the buffer member 86 can be a material with a modulus much smaller than that of the carrier 2, thereby effectively protecting the carrier 2 and the structures disposed thereon. For example, when the carrier 2 is made of a hard plastic, the material of the buffer member 86 can be a soft, easily deformable material such as rubber, silicone, Mylar, or foam.

[0294] As shown in FIG39 , the magnetic grating 84 can be fixed to the second side wall 13 of the base 1. The TMR sensor 83 can be fixed to the second side surface 24 of the carrier 2 and arranged opposite to the magnetic grating 84. It can be understood that the TMR sensor 83 can cooperate with the magnetic grating 84 to measure the displacement of the carrier 2 when it moves in the first direction. During the movement of the carrier 2, the displacement of the carrier 2 can be fed back to the controller (not shown) that controls the camera module, and the controller can then adjust the current of the carrier 2. The TMR sensor 83 has the advantages of high precision, high sensitivity, low power consumption, small size, good temperature stability, and a wide operating temperature range.

[0295] In some embodiments, the same contents as in the previous embodiments are not repeated. FIG42 is a schematic structural diagram of another embodiment of the motor 10 shown in FIG2 . FIG43 is an exploded schematic diagram of an embodiment of the motor 10 shown in FIG41 . FIG44 is a schematic cross-sectional diagram of an embodiment of the motor 10 shown in FIG42 at section line II.

[0296] As shown in Figures 42 to 44, the motor 10 may include a base 1, a carrier 2, n coils 3, m groups of magnet units 4, an electrical connector 5, a first circuit board 6, a second circuit board 7, a first ball 98, a second ball 99, a tunnel magnetoresistive effect sensor 83, a magnetic grid 84, a magnetic sheet 85, and a buffer 86. The arrangement of the n coils 3, m groups of magnet units 4, the electrical connector 5, the first circuit board 6, the second circuit board 7, the tunnel magnetoresistive effect sensor 83, the magnetic grid 84, the magnetic sheet 85, and the buffer 86 can refer to the arrangement of the motor 10 shown above and will not be repeated here.

[0297] The first ball 98 and the second ball 99 are fixedly connected to the bottom surface 22 of the carrier 2 at intervals along the second direction. The second direction may intersect with the first direction. For example, the first ball 98 may be fixed on the first protrusion 28. The second ball 99 may be fixed on the second protrusion 29. The first ball 98 and the second ball 99 are slidably connected to the bottom plate 11 of the base 1. The carrier 2 can be slidably connected to the base 1 via the balls. It can be understood that, compared to the solution of using guide rods to achieve the sliding connection of the carrier 2 to the base 1, the use of balls can reduce the area of ​​the sliding connection, which is conducive to reducing frictional resistance.

[0298] In some embodiments, the coil 3 can be fixed to the bottom surface 22 of the carrier 2. The first ball 98 and the second ball 99 are respectively located on both sides of the coil 3 and spaced apart from the coil 3. When the first ball 98 and the second ball 99 are slidably connected to the base 1, they can support the carrier 2 on both sides of the coil 3.

[0299] In some embodiments, the bottom plate 11 of the base 1 may be provided with a third slide groove 19. The first ball bearing 98 is slidably connected to the third slide groove 19. The first ball bearing 98 and the third slide groove 19 may serve as a concave-convex matching structure to facilitate positioning between the carrier 2 and the base 1 when the carrier 2 is mounted on the base 1.

[0300] This application, in conjunction with the accompanying drawings, introduces several motors 10 for camera modules 100. The motor may include a base 1, a carrier 2, n coils 3, and m groups of magnet units 4. One of the magnet unit 4 and the coils 3 is fixed to the base 1, and the other is fixed to the carrier 2. The carrier 2 is used to mount the first optical element 204. n and m are integers greater than or equal to 2, with m greater than n. The n coils 3 are arranged along a first direction, and the m groups of magnet units 4 are arranged along the first direction. The magnet units 4 include at least two opposite polarity directions, at least two of which intersect with the first direction. The n coils 3 face the m groups of magnet units 4 and are used to drive the carrier 2 to move relative to the base 1 along the first direction.

[0301] The distance A between the center lines of two adjacent coils 3 in the first direction satisfies: nA=jk, where j is a positive integer and k is the length of the magnet unit 4 in the first direction.

[0302] It is understood that when the coil 3 is energized, it can move in the first direction under the action of the magnetic field of the m groups of magnetic units 4, and thus the coil 3 can drive the carrier 2 to move in the first direction relative to the base 1. By setting nA = jk, after the n coils 3 are translated nA in the first direction, the magnetic field strength and direction of the n coils 3 before and after the movement of nA can be the same. If the magnitude and direction of the current in the n coils 3 before and after the movement can be set to be the same, the magnitude and direction of the Ampere force exerted on the n coils 3 can also be the same. That is, an alternating current with a period of nA can be passed through the n coils 3, so that when the n coils 3 move in the first direction, under the cooperation of the periodic alternating current and the magnetic field of the m groups of magnetic units 4, the n coils 3 can continuously move in the first direction, and the carrier 2 can achieve a long-stroke displacement in the first direction relative to the base 1.

[0303] n and m are integers greater than or equal to 2, and m is greater than n. The m groups of magnet units 4 are arranged along the first direction, and the stroke of the motor 10 depends on the length of the m groups of magnet units 4 in the first direction. By providing multiple groups of magnet units 4, the carrier 2 can move along a long stroke in the first direction. In addition, the multiple coils 3 are subjected to multiple Ampere forces in the magnetic field. Compared with the solution with one coil, the multiple coils 3 can drive a prism or lens with a larger mass to move, or, when the load remains unchanged, increasing the number of coils 3 can increase the movement speed of the carrier 2, thereby facilitating rapid focusing of the camera module 100.

[0304] When the carrier 2 needs to drive the first optical element 204 to move along the optical axis of the camera module 100, the first direction can be set to be parallel to the optical axis. In this way, the coil 3 can move along the carrier 2 in a direction parallel to the optical axis of the camera module 100.

[0305] In other embodiments, n coils 3 may also be fixed on the base 1 , and m groups of magnet units 4 may also be fixed on the carrier 2 .

[0306] It can be understood that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other, and any combination of features in different embodiments is also within the scope of protection of the present application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0307] It should be understood that all the above drawings are illustrative illustrations of the present application and do not represent the actual size of the product. Moreover, the dimensional ratios between the components in the drawings are not intended to limit the actual product of the present application.

[0308] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A motor (10), characterized in that: The invention comprises a base (1), a carrier (2), n coils (3), and m groups of magnet units (4), wherein one of the magnet unit (4) and the coils (3) is fixed to the base (1), and the other is fixed to the carrier (2), and the carrier (2) is used to mount a first optical element (204), wherein n and m are integers greater than or equal to 2, and m is greater than n. n coils (3) are arranged along a first direction, m groups of magnet units (4) are arranged along the first direction, the magnet units (4) include at least two polarity directions in opposite directions, at least two of the polarity directions intersect with the first direction, and the n coils (3) face the m groups of magnet units (4) and are used to drive the carrier (2) to move relative to the base (1) along the first direction; The distance A between the center lines of two adjacent coils (3) in the first direction satisfies: nA=jk, where j is a positive integer and k is the length of the magnet unit (4) in the first direction.

2. The motor (10) according to claim 1, characterized in that The length of the coil (3) in the first direction is greater than 0.5k and less than k.

3. The motor (10) according to claim 1 or 2, characterized in that The length of the m groups of magnet units (4) in the first direction is greater than or equal to 9000 micrometers.

4. The motor (10) according to any one of claims 1 to 3, characterized in that The magnet unit (4) comprises a first magnet (41) and a second magnet (42), the first magnet (41) and the second magnet (42) are arranged along the first direction, the polarity direction of the first magnet (41) and the polarity direction of the second magnet (42) are opposite, the polarity direction of the first magnet (41) and the polarity direction of the second magnet (42) both intersect with the first direction, and the sum of the length of the first magnet (41) in the first direction and the length of the second magnet (42) in the first direction is k; Alternatively, the magnet unit (4) comprises a first magnet (41), a second magnet (42) and a third magnet (43); the first magnet (41), the second magnet (42) and the third magnet (43) are arranged along a first direction; the third magnet (43) is located between the first magnet (41) and the second magnet (42); the polarity direction of the first magnet (41) is opposite to the polarity direction of the second magnet (42); the polarity directions of the first magnet (41), the second magnet (42) and the third magnet (43) are different and intersect with the first direction; the sum of the length of the first magnet (41) in the first direction, the length of the second magnet (42) in the first direction and the length of the third magnet (43) in the first direction is k.

5. The motor (10) according to claim 4, characterized in that The length of the first magnet (41) in the first direction is equal to the length of the second magnet (42) in the first direction.

6. The motor (10) according to any one of claims 1 to 5, characterized in that The n coils (3) include a first coil (31), a magnetic field direction of the first coil (31) at a first position is the same as a magnetic field direction of the first coil (31) at a second position, and a magnetic field intensity of the first coil (31) at the first position is the same as a magnetic field intensity of the first coil (31) at the second position; The distance between the first position and the second position in the first direction is nA.

7. The motor (10) according to any one of claims 1 to 5, characterized in that The n coils (3) include a first coil (31), and when the first coil (31) moves a distance of 0.5k along the first direction, the direction of current changes.

8. The motor (10) according to any one of claims 1 to 7, characterized in that The phase difference between the currents flowing through the n coils (3) is 360° / n.

9. The motor (10) according to any one of claims 1 to 5, characterized in that The n coils (3) include a first type of coil and a second type of coil, the first type of coil being the coil with the lowest magnetic field strength at a certain moment in the n coils (3), and the second type of coil being the coil (3) other than the first type of coil in the n coils (3); The first type of coil is de-energized, and the second type of coil is energized.

10. The motor (10) according to claim 9, characterized in that The n coils (3) include a first coil (31), a second coil (32) and a third coil (33), and the first coil (31), the second coil (32) and the third coil (33) are arranged along the first direction; The ratio of the displacement of the first coil (31) in the first direction when it is energized to the displacement when it is de-energized is 2:1; and / or, the ratio of the displacement of the second coil (32) in the first direction when energized to the displacement when energized is 2:1; And / or, the ratio of the displacement of the third coil (33) in the first direction when energized to the displacement when energized is 2:

1.

11. The motor (10) according to any one of claims 1 to 10, characterized in that The motor (10) further comprises an electrical connector (5), one end of which is fixed to the base (1), the other end of which is fixed to the carrier (2), and is electrically connected to the coil (3), and the electrical connector (5) has deformation capability.

12. The motor (10) according to claim 11, characterized in that The K value of the electrical connector (5) is less than 10 mN / mm.

13. The motor (10) according to claim 11 or 12, characterized in that The electrical connector (5) comprises a spiral structure or a broken line structure.

14. The motor (10) according to any one of claims 11 to 13, characterized in that The electrical connector (5) includes a spring; Alternatively, the electrical connector (5) includes a linear suspension component, one end of which is fixed to the base (1) and the other end is fixed to the carrier (2), and is electrically connected to the coil (3), and the linear suspension component is elastic.

15. The motor (10) according to any one of claims 1 to 14, characterized in that The carrier (2) comprises the first side plate (26) and the second side plate (27), the first side plate (26) and the second side plate (27) are arranged at an angle, the first optical element (204) is mounted on a surface of the first side plate (26) away from the second side plate (27), n coils (3) are fixed on a surface of the second side plate (27) away from the first side plate (26), and m groups of magnet units (4) are fixed on the base (1).

16. The motor (10) according to claim 15, characterized in that The carrier (2) further comprises a first protrusion (28) and a second protrusion (29), wherein the first protrusion (28) and the second protrusion (29) are arranged along a second direction, the first side plate (26) and the second side plate (27) are connected between the first protrusion (28) and the second protrusion (29), and the first direction and the second direction intersect; The first protrusion (28) and the second protrusion (29) are slidably connected to the base (1) via a guide rod.

17. The motor (10) according to any one of claims 1 to 15, characterized in that The motor (10) further comprises a first guide rod (81) and a second guide rod (82), wherein the first guide rod (81) and the second guide rod (82) are fixed to the base (1) at intervals along a second direction, the first guide rod (81) and the second guide rod (82) are respectively located on both sides of the coil (3) and are spaced apart from the coil (3), and the first direction and the second direction intersect; The carrier (2) is slidably connected to the first guide rod (81) and the second guide rod (82), and the length direction of the first guide rod (81) and the length direction of the second guide rod (82) are parallel to the first direction.

18. The motor (10) according to claim 17, characterized in that The base (1) comprises a bottom plate (11), a first bearing portion (14), a second bearing portion (15), a third bearing portion (16) and a fourth bearing portion (17), wherein the first bearing portion (14), the second bearing portion (15), the third bearing portion (16) and the fourth bearing portion (17) are fixed to the periphery of the bottom plate (11); The first bearing portion (14) and the second bearing portion (15) are arranged opposite to each other and spaced apart along the first direction, the third bearing portion (16) and the fourth bearing portion (17) are arranged opposite to each other and spaced apart along the first direction, the first bearing portion (14) and the third bearing portion (16) are arranged opposite to each other and spaced apart along the second direction, and the second bearing portion (15) and the fourth bearing portion (17) are arranged opposite to each other and spaced apart along the second direction; The two ends of the first guide rod (81) are respectively fixed to the first bearing part (14) and the second bearing part (15), and the two ends of the second guide rod (82) are respectively fixed to the third bearing part (16) and the fourth bearing part (17).

19. The motor (10) according to claim 17 or 18, characterized in that The bottom surface (22) of the carrier (2) is provided with a first sliding groove (221) and a second sliding groove (222); the first guide rod (81) is slidably connected to the first sliding groove (221), and the second guide rod (82) is slidably connected to the second sliding groove (222); The first chute (221) includes a "V"-shaped structure (2211), and the second chute (222) includes a "U"-shaped structure (2212).

20. The motor (10) according to claim 19, characterized in that There are two "V"-shaped structures (2211) and one "U"-shaped structure (2212); The two "V"-shaped structures (2211) and one "U"-shaped structure (2212) are sequentially connected to form a triangle, and the projection of the center of the carrier (2) on the plane where the triangle is located coincides with the triangle.

21. The motor (10) according to any one of claims 1 to 15, characterized in that The motor (10) further comprises a first ball (98) and a second ball (99), wherein the first ball (98) and the second ball (99) are fixed to the carrier (2) at intervals along a second direction, the first ball (98) and the second ball (99) are respectively located on both sides of the coil (3) and are spaced apart from the coil (3), and the first direction and the second direction intersect; The first rolling ball (98) and the second rolling ball (99) are slidably connected to the base (1).

22. The motor (10) according to any one of claims 1 to 21, characterized in that The motor (10) further includes a tunnel magnetoresistance effect sensor (83) and a magnetic grid (84); the tunnel magnetoresistance effect sensor (83) is fixed to the carrier (2) and spaced apart from the coil (3); the magnetic grid (84) is fixed to the base (1) and spaced apart from the magnet unit (4); the tunnel magnetoresistance effect sensor (83) and the magnetic grid (84) are arranged relative to each other.

23. The motor (10) according to any one of claims 1 to 22, characterized in that The motor (10) further comprises a magnetic sheet (85) made of metal material, wherein the magnetic sheet (85) is fixed to the carrier (2) or the base and is spaced apart from the coil (3), and the magnetic sheet (85) and the magnet unit (4) are arranged relative to each other.

24. The motor (10) according to any one of claims 1 to 23, characterized in that The motor (10) further includes a buffer member (86), the buffer member (86) being fixed on the base (1), the buffer member (86) and the carrier (2) being arranged relative to each other along the first direction, and the buffer member (86) being flexible.

25. A camera module (100), characterized in that: The invention comprises a first optical element (204), a photosensitive element (302), and a motor (10) according to any one of claims 1 to 24, wherein the photosensitive element (302) is located on the light-emitting side of the first optical element (204), and the first optical element (204) is mounted on a carrier (2) of the motor (10).

26. The camera module (100) according to claim 25, characterized in that The first optical element (204) is a prism, and the camera module (100) may further include a second optical element (203). The second optical element (203) may be located on the light-emitting side of the first optical element (204) and on the light-incident side of the photosensitive element (302).

27. The camera module (100) according to claim 26, characterized in that The camera module (100) may further include a third optical element (201) and a fourth optical element (202), wherein the third optical element (201) is located on the light incident side of the prism, and the fourth optical element (202) is located on the light incident side of the prism, and the third optical element (201) and the fourth optical element (202) are arranged at intervals along the first direction; The carrier (2) of the motor (10) drives the prism to move in a first direction. In a first position, the prism and the third optical element (201) are arranged relative to each other. In a second position, the prism and the fourth optical element (202) are arranged relative to each other.

28. An electronic device (1000), characterized in that The invention comprises a housing (200) and a camera module (100) according to any one of claims 25 to 27, wherein the camera module (100) is mounted on the housing (200).

Images