Motor, camera module, and electronic device

Abstract

The application provides a motor, a camera module and an electronic device. The motor comprises a base, a carrier, n coils and m groups of magnet units, one of the magnet units and the coils is fixed to the base, and the other is fixed to the carrier, the carrier is used for mounting 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, the m groups of magnet units are arranged along the first direction, the magnet units comprise at least two opposite polarity directions, the at least two polarity directions intersect the first direction, the n coils face the m groups of magnet units, and are used for driving the carrier to move along the first direction relative to the base. 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. After the coils are powered on, the carrier can be driven to move along the first direction relative to the base for a long stroke.

Description

Technical Field

[0001] This application relates to the field of shooting equipment technology, and more particularly to a motor, camera module, and electronic equipment. Background Technology

[0002] In recent years, with the development of optical imaging technology, people have higher and higher requirements for the camera function of portable electronic devices. They not only require the camera module of the electronic device to achieve functions such as background blur and clear night shooting, but also require the camera module of the electronic device to achieve telephoto shooting and macro shooting.

[0003] When a camera module is in macro shooting mode, it typically needs to capture objects at close range. The closer the working distance, the more motor travel is required. Current mobile phone camera modules with telephoto capabilities often have shorter motor travel, meaning the focusing distance may exceed the motor's maximum travel. This can make focusing difficult during macro shooting, resulting in poor macro image quality.

[0004] Therefore, providing a motor with a long stroke that can simultaneously meet the needs of telephoto and macro photography has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides a motor with a long stroke, a camera module, and an electronic device.

[0006] In a first aspect, embodiments of this application provide a motor. The motor includes a base, a carrier, n coils, and m sets of magnetic units. One of the magnetic units and coils 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 sets of magnetic units are also arranged along the first direction. Each magnetic unit includes at least two opposite polarity directions, and at least two polarity directions intersect the first direction. The n coils face the m sets of magnetic units and are used to drive the carrier to move relative to the base along the first direction. The distance A between the centerlines of two adjacent coils in the first direction satisfies: nA = jk, where j is a positive integer and k is the length of the magnetic unit in the first direction.

[0007] Understandably, when the coils are energized, they can move along a first direction under the magnetic field of the m sets of magnet units, thereby driving the carrier to move relative to the base along the first direction. By setting nA = jk, after the n coils are translated nA along the first direction, the magnetic field strength and direction of the n coils at the positions before and after the translation can be the same. If the magnitude and direction of the current on the n coils at the positions before and after the translation 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 along the first direction, under the cooperation of the periodic alternating current and the magnetic field of the m sets of magnet units, the n coils can continuously experience a force in one direction, allowing the n coils to continuously move in the first direction, and the carrier can achieve a long-stroke displacement relative to the base along the first direction.

[0008] n and m are integers greater than or equal to 2, with m greater than n. m sets of magnetic units are arranged along the first direction. The motor's stroke depends on the length of the m sets of magnetic units along the first direction. By setting multiple sets of magnetic units, a longer stroke of the carrier along the first direction can be achieved. Furthermore, multiple coils experience multiple Ampere forces in the magnetic field. Compared to a single-coil solution, multiple coils can move a prism or lens with a larger mass. Alternatively, increasing the number of coils while keeping the load constant can increase the carrier's speed, thus facilitating rapid focusing of the camera module.

[0009] 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 move along the direction parallel to the optical axis of the camera module.

[0010] In some possible implementations, the length of the coil in the first direction is greater than 0.5k and less than k.

[0011] It is understandable that when a coil moves in a magnetic field, the two straight sections on either side of the coil experience forces. The length of the coil in the first direction is greater than 0.5k. The two straight sections on either side of the coil can be located within adjacent magnetic field ranges with opposite directions. When a positive current is applied to the first coil, the forces on the two straight sections on either side of the coil can be directed in the same direction. This avoids the straight sections on either side of the coil being in the same magnetic field direction, which would cause the forces on the two straight sections to be opposite and cancel each other out, reducing the coil's efficiency. The length of the coil in the first direction is less than k, preventing the coil from crossing three or more magnetic fields, which would render the magnetic field between the two straight sections of the coil ineffective. The length of the coil in the first direction is less than k, requiring less space for the first coil, which helps reduce the size of the motor.

[0012] In some possible implementations, the length of m groups of magnet units in the first direction is greater than or equal to 9000 micrometers.

[0013] It is understandable that the length of m sets of magnet units in the first direction is greater than or equal to 9000 micrometers, and the length of the magnetic field formed by m sets of magnet units in the first direction can also be greater than or equal to 9000 micrometers. Under a longer magnetic field range, n coils can drive the carrier to move a larger distance relative to the base along the first direction.

[0014] In some possible implementations, the magnet unit includes a first magnet and a second magnet, which are arranged along a first direction. The polarity directions of the first magnet and the second magnet are opposite, and both the polarity directions of the first magnet and the second magnet intersect the first direction. The sum of the lengths of the first magnet and the second magnet in the first direction is k.

[0015] Alternatively, the magnet unit includes a first magnet, a second magnet, and a third magnet, arranged along a first direction, with the third magnet located between the first and second magnets. The polarity of the first magnet is opposite to that of the second magnet. The polarity of the first, second, and third magnets are all different and all intersect the first direction. The sum of the lengths of the first magnet, the second magnet, and the third magnet in the first direction is k.

[0016] Understandably, the polarity direction can be from the North Pole (N) towards the South Pole (S), or from the South Pole (S) towards the North Pole (N). One of the first and second magnets can have the North Pole (N pole) and the other the South Pole (S pole). Adjacent first and second magnets can form an N-S magnetic field. m sets of magnet units can include multiple consecutive North and South Pole magnetic fields, whose direction and intensity can vary periodically with a period of k. Two magnetic fields in opposite directions form a magnetic field period.

[0017] The first, second, and third magnets can form a Hellbeck magnet array. Understandably, compared to a magnet array with only north and south pole magnets (array 9), the Hellbeck magnet array exhibits a stronger magnetic field near the magnets. With a constant current flowing through the coil, the Hellbeck magnet array exerts a stronger driving force on the coil than a typical magnet array.

[0018] In some possible implementations, the lengths of the first magnet and the second magnet in the first direction are equal.

[0019] Understandably, the magnetic field of the m groups of magnet units is more uniformly distributed along the first direction. When the coil moves in the magnetic field after being energized, the period of the force it experiences can be k / 2.

[0020] In some possible implementations, the n coils include a first coil whose magnetic field direction at a first position is the same as that at a second position, and whose magnetic field magnitude at the first position is the same as that at the second position. The distance between the first and second positions in the first direction is nA.

[0021] It is understandable that n coils move a distance nA in the first direction, with the positions before and after the movement being the first position and the second position, respectively. The n coils include the first coil, and the magnetic field direction of the first coil at the first position is the same as that at the second position, as is the magnitude of the magnetic field. While the n coils are moving in the first direction, a current of the same direction and magnitude can be passed through the second position from the first position. At this time, the force on the n coils at the first position is in the same direction as the force at the second position. For example, if the force on the n coils at the first position is along the forward direction, the force at the second position can also be along the forward direction. When the n coils are moving in the first direction, a current with a period of nA can be passed through the coils. It is only necessary to design the current direction within the nA period so that the force on the n coils is always along the forward direction within the nA period, allowing the n coils to continuously move in the first direction. When the n coils return, the current can be reversed, thus reversing the force on the coils and allowing the coils to drive the carrier backward.

[0022] In some possible implementations, the n coils include a first coil, the current direction of which changes when the first coil is moved 0.5k along a first direction.

[0023] It is understandable that the period of the magnetic field formed by m magnet units can be k, and within one period k, there are two magnetic fields in opposite directions. When the coil moves in the first direction, when the first coil moves 0.5k distance in the first direction, the current direction changes. The current commutation interval is matched with the length of the magnetic field, so that after each commutation, the force on the coil in the magnetic field is always in one direction.

[0024] In some possible implementations, the phase difference of the energizing currents of the n coils is 360° / n.

[0025] It is understandable that the n coils are in different positions in the magnetic field of the m sets of magnet units at a certain moment. The direction and intensity of the magnetic field at each position of the n coils can also be different. The current flowing through the n coils can have a phase difference, so that when the n coils move along the first direction, the force on the n coils is all in the same direction.

[0026] The magnetic field formed by m magnet units can have a period of k, which includes two magnetic fields in opposite directions within one period k. The force period of the coil is 0.5k. Within one force period of the coil, the phase difference of the currents in the n coils is 360° / n. The n coils can take turns outputting force, so that the force on the n coils is uniform during the movement of the n coils in the first direction, and the movement of the carrier is relatively stable.

[0027] 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 certain moment among the n coils, and the second type of coil is all the coils other than the first type of coil. The first type of coil is de-energized, and the second type of coil is energized.

[0028] It is understandable that when the current flowing through the n coils remains constant, the coil located at a position with a stronger magnetic field experiences a greater force. Choosing to energize the second type of coil, which experiences a greater force, and de-energizing the first type of coil, which has lower efficiency, helps to reduce the power consumption of the motor.

[0029] In some possible implementations, the n coils include a first coil, a second coil, and a third coil, which are arranged along a first direction;

[0030] The ratio of the displacement of the first coil when it is energized in the first direction to its displacement when it is de-energized is 2:1;

[0031] And / or, the ratio of the displacement of the second coil when it is energized in the first direction to the displacement when it is de-energized is 2:1;

[0032] And / or, the ratio of the displacement of the third coil when energized in the first direction to the displacement when de-energized is 2:1.

[0033] It is understandable that the n coils include the first coil, the second coil, and the third coil. At any given time, two coils are under force to drive the carrier to move. The first coil, the second coil, and the third coil are de-energized in turn. Each coil is de-energized for 1 / 3 of the cycle length within one force cycle. During the movement of the n coils in the first direction, they can still have a large force to drive the carrier to move.

[0034] In some possible implementations, the motor further includes an electrical connector, one end of which is fixed to the base and the other end to the carrier, and which is electrically connected to the coil. The electrical connector is deformable.

[0035] Understandably, when the n coils drive the carrier to move along the first direction, the electrical connectors can deform, thereby supplying power to the coils during the movement. This prevents the electrical connectors from detaching from the carrier due to an excessively long movement path, which could lead to a power outage between the connectors and the second circuit board, thus de-energizing the coils and affecting the motor's operation.

[0036] In some possible implementations, the K value of the electrical connector is less than 10 mN / mm.

[0037] It is understandable that by setting the K value of the electrical connector within a small range, the electrical connector will cause less resistance to the movement of the carrier when the carrier moves along the first direction, resulting in lower motor power consumption.

[0038] In some possible implementations, the electrical connector includes a helical structure or a zigzag structure.

[0039] Understandably, spiral or zigzag structures can be used to extend the length of electrical connectors and reduce the K-value of the electrical connectors.

[0040] In some possible implementations, the electrical connector includes a spring;

[0041] Alternatively, the electrical connector includes a linear suspension assembly, one end of which is fixed to the base and the other end to the carrier, and is electrically connected to a coil; the linear suspension assembly is elastic.

[0042] Understandably, both the spring and the linear suspension assembly can deform. When the n coils drive the carrier to move along the first direction, the electrical connectors can deform, thereby supplying power to the coils during the movement. This prevents the electrical connectors from detaching from the carrier due to an excessively long movement path, which could lead to a power outage between the connectors and the second circuit board, thus de-energizing the coils and affecting the motor's operation.

[0043] In some possible implementations, the carrier includes a first side plate and a second side plate, which are arranged at an angle. A first optical element is mounted on the surface of the first side plate away from the second side plate. n coils are fixed on the surface of the second side plate away from the first side plate. m sets of magnet units are fixed to the base.

[0044] Understandably, the first and second side panels are set at an angle to form a slope, which can effectively utilize space and reduce the size of the camera module.

[0045] In some possible implementations, the carrier further includes a first protrusion and a second protrusion, which are arranged along a second direction. A first side plate and a second side plate are connected between the first protrusion and the second protrusion, and the first direction and the second direction intersect. The first protrusion and the second protrusion are slidably connected to the base via guide rods.

[0046] Understandably, compared to the scheme where the guide rod is connected to one side of the carrier, by setting a first protrusion and a second protrusion to connect to both sides of the first and second side plates, and 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 connecting guide rod is positioned on 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.

[0047] In some possible implementations, the motor further includes a first guide rod and a second guide rod, which are fixed to the base at a distance along a second direction. The first and second guide rods are located on opposite sides of the coil and are spaced apart from the coil. The first and second directions intersect. A carrier is slidably connected to the first and second guide rods, and the length directions of the first and second guide rods are parallel to the first direction.

[0048] It is understandable that by setting the length directions of the first guide rod and the second guide rod to be parallel to the first direction, the first guide rod and the second guide rod can provide support when the carrier moves along the first direction. At the same time, they can also guide the direction of movement of the carrier, avoid misalignment of the carrier during the movement, and ensure that the carrier moves quickly and stably.

[0049] In some possible implementations, the base includes a base plate, a first support portion, a second support portion, a third support portion, and a fourth support portion, which are fixed to the periphery of the base plate. The first and second support portions are arranged opposite to each other and spaced apart along a first direction, the third and fourth support portions are arranged opposite to each other and spaced apart along the first direction, the first and third support portions are arranged opposite to each other and spaced apart along a second direction, and the second and fourth support portions are arranged opposite to each other and spaced apart along the second direction. The two ends of the first guide rod are fixed to the first and second support portions, respectively, and the two ends of the second guide rod are fixed to the third and fourth support portions, respectively.

[0050] It is understandable that the bearing column can be used to fix the guide rod. By setting the bearing column relative to 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.

[0051] In some possible implementations, the bottom surface of the carrier is provided with a first groove and a second groove, a first guide rod is slidably connected to the first groove, and a second guide rod is slidably connected to the second groove. The first groove includes a "V" shaped structure, and the second groove includes a "U" shaped structure.

[0052] Understandably, the first and second slide grooves 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 in the Y-axis direction, enabling rapid positioning of the carrier in the Y-axis direction during assembly with the first and second guide rods. Even when the actual product size of the first guide rod is slightly larger than the design size due to tolerance, the first guide rod can still be assembled within the "V"-shaped structure.

[0053] The width of the U-shaped groove can be greater than the width of the second guide rod. This allows for a certain degree of manufacturing error in the carrier, ensuring that even if the carrier's dimensions slightly increase or decrease due to manufacturing errors, it can still successfully slide and connect to the first and second guide rods. The U-shaped structure improves the tolerance for errors and helps save on production costs.

[0054] 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 connected in sequence to form a triangle, and the projection of the center of the carrier onto the plane of the triangle coincides with the triangle.

[0055] Understandably, the three-point connection between the carrier and the first and second guide rods can reduce the risk of the carrier swaying during movement.

[0056] In some possible implementations, the motor further includes a first ball and a second ball, which are fixed to the carrier at a distance along a second direction. The first ball and the second ball are located on opposite sides of the coil and are spaced apart from the coil. The first direction and the second direction intersect. The first ball and the second ball are slidably connected to the base.

[0057] It is understandable that, compared to using guide rods to achieve a sliding connection between the carrier and the base, using ball bearings can reduce the area of ​​the sliding connection, which is beneficial to reducing frictional resistance.

[0058] In some possible implementations, the motor further includes a tunneling magnetoresistive sensor and a magnetic grating. The tunneling magnetoresistive sensor is fixed to the carrier and spaced apart from the coil, while the magnetic grating is fixed to the base and spaced apart from the magnet unit. The tunneling magnetoresistive sensor and the magnetic grating are arranged opposite to each other.

[0059] Understandably, TMR sensors can be used in conjunction with magnetic gratings to measure the displacement of a carrier moving in the first direction. TMR sensors offer advantages such as high accuracy, high sensitivity, low power consumption, small size, good temperature stability, and a wide operating temperature range.

[0060] In some possible implementations, the motor also includes a metal magnetic plate, which is fixed to a carrier or base and spaced apart from the coil, with the magnetic plate and the magnet unit arranged opposite to each other.

[0061] It is understandable that there is an attraction between the magnetic accumulator and the magnet unit. In the direction that the magnetic accumulator faces the magnet unit, it can limit the carrier and reduce the risk of carrier shaking.

[0062] In some possible implementations, the motor further includes a buffer element fixed to the base, the buffer element and the carrier being disposed opposite each other along a first direction, and the buffer element being flexible.

[0063] Understandably, when the carrier moves along the first direction or collides with the base during reliability testing, the buffer 86 can absorb the deformation impact energy and reduce the damage to the carrier caused by the collision impact.

[0064] Secondly, embodiments of this 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 carrier of the motor. The motor of the camera module can achieve a large stroke displacement, and the camera module has high imaging quality, thereby improving the shooting experience.

[0065] In some possible implementations, the first optical element is a prism, and the camera module may also include a second optical element, which may be located on the light-emitting side of the first optical element and on the light-incident side of the photosensitive element.

[0066] Understandably, since the mass of a prism is greater than that of a lens, the motor in this application has a greater load-bearing capacity, which can support the prism to move at a faster speed, resulting in a faster response speed for the camera module and a better user experience.

[0067] In some possible implementations, the camera module may further include a third optical element and a fourth optical element, the third optical element being located on the light-incident side of the prism, and the fourth optical element being located on the light-incident side of the prism, the third optical element and the fourth optical element being arranged at intervals along a first direction. The motor carrier drives the prism to move along the first direction. In the first position, the prism and the third optical element are positioned opposite each other, and in the second position, the prism and the fourth optical element are positioned opposite each other.

[0068] It's understandable that the optical power of the third and fourth optical elements can be different. When the prism is in the first position, the third and second optical elements form one focusing lens group. When the prism is in the second position, the fourth and second optical elements form another focusing lens group, and the optical power of these two focusing lens groups can be different. When the camera module has different focusing requirements, the prism can be moved along the first direction by a motor to switch the focusing lens group to meet the focusing needs of the camera module. This results in a better user experience.

[0069] Thirdly, embodiments of this application provide an electronic device. The electronic device includes a housing and a camera module, with the camera module mounted on the housing. This electronic device offers a superior shooting experience. Attached Figure Description

[0070] To illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0071] Figure 1 This is a schematic diagram of one embodiment of the electronic device provided in this application.

[0072] Figure 2 yes Figure 1 A partial cross-sectional view of the electronic device shown in one embodiment on line AA;

[0073] Figure 3 yes Figure 2 A schematic diagram of one embodiment of the motor shown in the figure;

[0074] Figure 4 yes Figure 3 An exploded view of one embodiment of the motor shown;

[0075] Figure 5 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor shown in the figure;

[0076] Figure 6 yes Figure 5 A schematic diagram of the structure shown from another angle;

[0077] Figure 7 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor shown in the figure;

[0078] Figure 8a yes Figure 7 A schematic diagram of one embodiment of the magnet array shown in another angle;

[0079] Figure 8b yes Figure 8aThe diagram shown is a structural schematic of one embodiment of the structure at section line BB.

[0080] Figure 9 yes Figure 3 A schematic diagram of one embodiment of the carrier shown;

[0081] Figure 10 yes Figure 3 The diagram shows a partial structural view of the motor from another angle.

[0082] Figure 11 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor shown in the figure;

[0083] Figure 12 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor shown in the figure;

[0084] Figure 13 yes Figure 3 A partial structural diagram of the motor shown from another angle;

[0085] Figure 14 yes Figure 13 The structure shown is a partial cross-sectional view of one embodiment at section line CC;

[0086] Figure 15 yes Figure 14 An assembly diagram of one embodiment of the structure shown;

[0087] Figure 16 yes Figure 15 The diagram shows a structural schematic of one embodiment of the structure at section line DD;

[0088] Figure 17 yes Figure 15 A schematic diagram of one embodiment of the force exerted on the first coil as it moves along a first direction while the current direction remains unchanged;

[0089] Figure 18 yes Figure 16 A schematic diagram of one embodiment of the current and force conditions when the first coil moves, as shown;

[0090] Figures 19 to 26 This is a schematic diagram showing the relative positions of n coils and a magnet array at different times in one implementation method.

[0091] Figure 27 The first coil, the second coil, and the third coil are in such a way Figure 19 As for Figure 26 A schematic diagram of an implementation method during the movement process;

[0092] Figure 28 There are n coils in such Figure 27 A schematic diagram illustrating one embodiment of the displacement and force relationship under the energized state shown;

[0093] Figure 29 The first coil, the second coil, and the third coil are in such a way Figure 19 As for Figure 26 A schematic diagram of an alternative implementation method during the movement process;

[0094] Figure 30 This is a schematic diagram of another implementation of the coil current;

[0095] Figure 31 This is a schematic diagram of another implementation of the coil current;

[0096] Figure 32 yes Figure 14 An assembly diagram of another embodiment of the coil and magnet unit shown;

[0097] Figure 33 yes Figure 14 An assembly schematic diagram of another embodiment of the coil and magnet unit shown;

[0098] Figure 34 yes Figure 14 A schematic diagram of the assembly of another embodiment of the coil and magnet unit shown;

[0099] Figure 35 yes Figure 13 A schematic diagram of another embodiment of the electrical connector shown;

[0100] Figure 36a yes Figure 13 A schematic diagram of another embodiment of the electrical connector shown;

[0101] Figure 36b yes Figure 13 A partial structural schematic diagram of another embodiment of the electrical connector 5 shown;

[0102] Figure 36c yes Figure 36b The extension 53 shown is a partial cross-sectional view of one embodiment of section line JJ.

[0103] Figure 37 yes Figure 13 The structure shown is a partial cross-sectional view of one embodiment at section line EE;

[0104] Figure 38 yes Figure 3A partial structural schematic diagram of one embodiment of the motor shown in another angle;

[0105] Figure 39 yes Figure 38 A cross-sectional schematic diagram of one embodiment of the motor shown at section line FF.

[0106] Figure 40 yes Figure 38 A schematic cross-sectional view of one embodiment of the motor shown at section line GG.

[0107] Figure 41 yes Figure 38 A cross-sectional schematic diagram of one embodiment of the motor shown at section line HH.

[0108] Figure 42 yes Figure 2 A schematic diagram of another embodiment of the motor shown;

[0109] Figure 43 yes Figure 41 An exploded view of one embodiment of the motor shown;

[0110] Figure 44 yes Figure 42 The diagram shows a cross-sectional view of the motor at section line II in one embodiment. Detailed Implementation

[0111] For ease of understanding, the English abbreviations and related technical terms used in the embodiments of this application will be explained and described below.

[0112] Lens: A lens is a component that uses the principle of refraction to allow light from a scene to pass through it and form a clear image on the focal plane. A lens may contain one or more lenses, which can be concave or convex lenses.

[0113] Optical axis: The direction in which light rays travel through an optical system, referenced to the principal ray at the center of the field of view. For symmetrical transmission systems, it generally coincides with the rotation center line of the optical system. For off-axis and reflective systems, the optical axis may appear as a broken line.

[0114] Focusing: Focusing, also known as light focusing or focusing, is the process of changing the position of the object distance and the camera lens distance through the camera's focusing mechanism to make the subject appear sharp. Digital cameras typically have multiple focusing modes, such as autofocus, manual focus, or multiple focus modes.

[0115] Autofocus: Autofocus is a method that uses the principle of light reflection from an object to receive the reflected light from the camera's sensor (such as a charge-coupled device (CCD)). The computer then processes the reflected light and drives the motorized focusing mechanism to achieve the desired focus.

[0116] Macro photography refers to photographing objects at a relatively close shooting distance with a high magnification. It is often used to photograph very small objects, such as flowers and insects. Macro photography usually requires shooting objects at close range; the closer the working distance, the longer the motor stroke is required.

[0117] Heilbeck magnets: By combining magnets of three directions, stronger magnetic thrust is achieved, but the required anti-overturning torque also increases accordingly.

[0118] Linear suspension assembly: Trace Suspension Assembled (TSA). A component where the spring and signal line are integrally molded.

[0119] The embodiments of this application are described below with reference to the accompanying drawings. The embodiments described herein with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0120] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. 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 this application, "electrical connection" can be understood as components physically contacting and conducting electricity; it can also be understood as a form of connection between different components in a circuit structure through physical lines that can transmit electrical signals, such as copper foil or wires on a printed circuit board (PCB). "Connection" and "connected" can both refer to a mechanical connection relationship or a physical connection relationship. For example, A connected to B or A connected to B can mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or that A and B are in contact with each other and are difficult to separate.

[0121] Furthermore, the term "fixed" in this document should be interpreted broadly. For example, "fixed" can mean direct fixing or indirect fixing through an intermediate medium. "Fixed" refers to connections where the relative positional relationship remains unchanged after connection. The directional terms used in the embodiments of this application, such as "upper" and "lower," are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. "Multiple" refers to two or more.

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

[0123] In the embodiments of this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0124] Furthermore, the limitations on relative positional relationships mentioned in the embodiments of this application, such as parallel, perpendicular, and aligned, are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallelism, perpendicularity, and alignment are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0125] Figure 1 This is a schematic diagram of one embodiment of the electronic device 1000 provided in this application. Figure 2 yes Figure 1 A partial cross-sectional view of the electronic device 1000 shown in one embodiment on line AA.

[0126] Electronic device 1000 can be a mobile phone, a tabby personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a laptop computer, in-vehicle equipment, video surveillance equipment, wearable devices, augmented reality (AR) glasses, AR headsets, virtual reality (VR) glasses, or VR headsets, or other devices with camera functions. Figure 1 The electronic device 1000 of the embodiment shown is illustrated using a mobile phone as an example.

[0127] like Figure 1 and Figure 2 As shown, the electronic device 1000 may include a camera module 100, a housing 200, and a screen 300. The camera module 100 can be a rear-facing camera module or a front-facing camera module. This application uses a rear-facing camera module 100 as an example for illustration. It should be noted that... Figure 1 , Figure 2 The accompanying drawings below only schematically illustrate some components included in the electronic device 1000; the actual shape, size, location, and construction of these components are not subject to change. Figure 1 , Figure 2 As defined in the accompanying drawings below. In other embodiments, when the electronic device 1000 is a device of some other form, the electronic device 1000 may not include the screen 300.

[0128] For ease of description, the thickness direction of electronic device 1000 is defined as the X-axis. The length direction of electronic device 1000 is defined as the Y-axis. The width direction of electronic device 1000 is defined as the Z-axis. It can be understood that the coordinate system of electronic device 1000 can be flexibly set according to specific practical needs.

[0129] 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, that is, the back cover 220 and the frame 210 are a single integral structure.

[0130] Alternatively, the screen 300 can be located on the side of the bezel 210 away from the back cover 220. In this case, the screen 300 and the back cover 220 are located on opposite sides of the bezel 210. The screen 300, the bezel 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 radio, or a microphone.

[0131] In some implementations, screen 300 can be used to display images, etc. Screen 300 can be a flat screen or a curved screen. The display screen of screen 300 can be an organic light-emitting diode (OLED) display screen, or an active-matrix organic light-emitting diode (AMOLED) display screen, or a liquid crystal display (LCD) display screen, etc.

[0132] 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 is used to acquire and process image data from the camera module 100. The communication connection between the camera module 100 and the image processor 400 may include data transmission via electrical connections such as wiring, or data transmission may be achieved through coupling or other methods. It is understood that the camera module 100 and the image processor 400 may also be connected via other methods capable of data transmission.

[0133] The image processor 400 optimizes digital image signals and transmits the processed signals to the screen 300. The image processor 400 can be an image processing chip or a digital signal processing chip. Its function is to transmit the data obtained by the image sensor to the central processing unit in a timely and fast manner and refresh the image sensor. Therefore, the quality of the image processor 400 chip directly affects the image quality (such as color saturation, sharpness, etc.).

[0134] In some embodiments, the electronic device 1000 may further include an analog-to-digital converter 500 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.

[0135] In some embodiments, the electronic device 1000 may further include a memory 600, which is communicatively connected to an image processor 400. The image processor 400 processes the digital image signal before transmitting the image to the memory 600, so that the image can be retrieved from the memory 600 and displayed on the screen 300 whenever it is needed to view the image later. In some embodiments, the image processor 400 may also compress the processed digital image signal before storing it in the memory 600, thereby saving memory space.

[0136] For example, the camera module 100 may be located inside the electronic device 1000. The camera module 100 may be fixedly connected to the side of the screen 300 facing the rear cover 220. The rear cover 220 may have a light-transmitting hole 2201. The shape of the light-transmitting hole 2201 is not limited to the following. Figure 1 The schematic diagram shows a circle. The light-transmitting hole 2201 connects the interior of the electronic device 1000 to the exterior. Light from outside the electronic device 1000 can enter the interior through the light-transmitting hole 2201. The camera module 100 can capture the ambient light entering the interior of the electronic device 1000.

[0137] The image processor 400, analog-to-digital converter 500, and memory 600 may also be located inside the electronic device 1000. Figure 1 The image processor 400, analog-to-digital converter 500, and memory 600 are illustrated using dashed boxes.

[0138] In some embodiments, the back cover 220 may include a light-transmitting lens mounted on the light-transmitting hole 2201 to allow light to pass through and to provide dust and water protection.

[0139] Understandable, Figure 1 The installation position of the camera module 100 in the illustrated embodiment of the electronic device 100 is merely illustrative, and this 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 in other locations on the electronic device 1000, such as the upper center 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 rotate, move, or be detached relative to the terminal body, and the camera module 100 may also be disposed on the auxiliary component. Furthermore, Figure 1 The dimensions, number, and location of the image processor 400, analog-to-digital converter 500, and memory 600 shown are merely illustrative and can be adjusted as needed; this application does not impose any limitations on them.

[0140] like Figure 2As shown, 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 can be used to convert the optical image into an electrical signal, i.e., an analog image signal, and transmit it to an analog-to-digital converter 500, so that the analog-to-digital converter 500 can convert it into a digital image signal for the image processor 400. The motor 10 can be used to drive the first optical element 204 to move.

[0141] In some embodiments, the camera module 100 can be a periscope camera module 100 (i.e., the optical axis direction of the camera module 100 can be any direction on the YZ plane). This results in a lower height of the camera module 100 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 direction of the camera module 100 can be parallel to the X-axis direction).

[0142] 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-incident side of the photosensitive element 302. For example, the first optical element 204 may be a prism. The second optical element 203 may be a lens group.

[0143] In some embodiments, the camera module 100 may further include a second optical element 203. The first optical element 204 may be a lens group (not shown). The second optical element 203 may also be a lens group. The second optical element 203 is located on the light-emitting side of the first optical element 204 and on the light-incident side of the photosensitive element 302. The motor 10 may be used to drive the lens group to move in order to achieve focusing of the camera module 100.

[0144] 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 (e.g., Figure 2 (As shown). 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-outceasing 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.

[0145] For example, the third optical element 201 and the fourth optical element 202 can be spaced apart along the first direction. The optical power of the third optical element 201 and 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 positioned opposite the third optical element 201 in the first position, and opposite the fourth optical element 202 in the second position. In this way, the third optical element 201 and the second optical element 203 form one focusing lens group, and the fourth optical element 202 and the second optical element 203 form another focusing lens group, and the two focusing lens groups have different optical powers. When the camera module 100 has different focusing requirements, the motor 10 can control the prism to move along the Z-axis direction to switch the focusing lens group to meet the focusing requirements of the camera module 100. The embodiments described in this article use the first optical element 204 as an example of a prism.

[0146] In some embodiments, the mass of the prism can be greater than or equal to 2000 mg. The displacement of the prism can be greater than or equal to 9000 micrometers. When the displacement of the prism is greater than or equal to 9000 micrometers, the time for the motor 10 to drive the prism can be less than or equal to 60 milliseconds. Thus,

[0147] In some embodiments, the camera module 100 may include two motors 10, which are used to drive the first optical element 204 and the second optical element 203 to move along the Z-axis direction, respectively.

[0148] 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 pass sequentially 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 is also 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.

[0149] The photosensitive element 302 can be used to convert light signals into electrical signals. The photosensitive element 302 (also called an image sensor) can be a semiconductor chip containing hundreds of thousands to millions of photodiodes on its surface, which generate electrical charges when exposed to light. The photosensitive element 302 can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) device. CCDs are made using a highly sensitive semiconductor material that converts light into electrical charges. CCDs consist of many photosensitive units, typically measured in megapixels. When the surface of a CCD is illuminated, each photosensitive unit reflects a charge onto the component; the signals generated by all the photosensitive units are added together to form a complete image. CMOS devices primarily utilize semiconductors made of silicon and germanium, allowing N-type (negatively charged) and P-type (positively charged) semiconductors to coexist on the CMOS. The current generated by these complementary effects can be recorded and interpreted by the processing chip as an image.

[0150] The filter 301 can be used to filter out unwanted wavelengths of light, preventing the photosensitive element 302 from producing false colors or ripples, thereby improving its effective resolution and color reproduction. For example, the filter 301 can be an infrared filter 301. In some other embodiments, the camera module 100 may also omit the separate filter 301 structure, instead achieving the filtering function by surface treatment or material treatment of some optical elements (e.g., the second optical element 203, the third optical element 201, or the fourth optical element 202). This application does not strictly limit the specific embodiments of the structures or components used to achieve the filtering function.

[0151] The preceding text has detailed the structure of the electronic device 1000 and the camera module 100. The following text will, in conjunction with the accompanying drawings, describe several implementation methods of the motor 10. It is understood that, for the sake of simplification, when the drawings include the same structure, some structures may be labeled, some may be left unlabeled, or all structures may be labeled.

[0152] Figure 3 yes Figure 2 The diagram shows a structural schematic of one embodiment of the motor 10 shown. Figure 4 yes Figure 3 An exploded view of one embodiment of the motor 10 shown.

[0153] like Figure 3 and Figure 4As shown, the motor 10 may include a base 1, a carrier 2, n coils 3, m sets of magnet units 4, electrical connectors 5, a first circuit board 6, a second circuit board 7, a first guide rod 81, a second guide rod 82, a tunneling magnetoresistive sensor 83, a magnetic grating 84, a magnetic absorbing sheet 85, and a buffer 86. n and m are integers greater than or equal to 2, where m is greater than n. The accompanying drawings of this application use an example of 3 coils 3 for illustration (i.e., n = 3).

[0154] Figure 5 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor 10 shown. Figure 6 yes Figure 5 The diagram shows a structural schematic from another angle.

[0155] like Figure 5 indivual Figure 6 As shown, the base 1 may include a base plate 11, a first side wall 12, a second side wall 13, a first support portion 14, a second support portion 15, a third support portion 16, and a fourth support portion 17. The first side wall 12, the second side wall 13, the first support portion 14, the second support portion 15, the third support portion 16, and the fourth support portion 17 may be fixed to the periphery of the base plate 11.

[0156] In some embodiments, the base plate 11 may include a top surface 111 and a bottom surface 112 disposed opposite to 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, which penetrates 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 of the through hole 113 may form a mounting groove 114.

[0157] In some implementations, the first circuit board 6 may be a printed circuit board (PCB).

[0158] In some embodiments, for example, the first support portion 14 and the second support portion 15 may be arranged opposite to each other and spaced apart along a first direction. The third support portion 16 and the fourth support portion 17 may be arranged opposite to each other and spaced apart along the first direction. The first support portion 14 and the third support portion 16 may be arranged opposite to each other and spaced apart along a second direction. The second support portion 15 and the fourth support portion 17 may be arranged opposite to each other and spaced apart along a second direction.

[0159] For example, the first direction can be parallel to the Z-axis direction. The second direction can be parallel to the Y-axis direction.

[0160] The first guide rod 81 and the second guide rod 82 can be fixed to the base 1 at intervals along a 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. For example, the two ends of the first guide rod 81 can be fixed to the first support portion 14 and the second support portion 15, respectively. The two ends of the second guide rod 82 can be fixed to the third support portion 16 and the fourth support portion 17, respectively. For example, the first support portion 14 can be provided with a first through hole 141. The second support portion 15 can be provided with a second through hole 151. The third support portion 16 can be provided with a third through hole 161. The fourth support portion 17 can be provided with a fourth through hole 171. The two ends of the first guide rod 81 are fixed in the first through hole 141 and the second through hole 151, respectively. The two ends of the second guide rod 82 are fixed in the third through hole 161 and the fourth through hole 171, respectively.

[0161] In some embodiments, the number of buffer members 86 can be four. The four buffer members 86 can be fixed to the side surfaces of the first support portion 14, the second support portion 15, the third support portion 16 and the fourth support portion 17 facing the motion space 18, respectively.

[0162] The first sidewall 12 and the second sidewall 13 can be spaced apart on the base plate 11 along a second direction. For example, the first sidewall 12 can be connected between the first support portion 14 and the second support portion 15. The second sidewall 13 can be connected between the third support portion 16 and the fourth support portion 17. The base plate 11, the first sidewall 12 and the second sidewall 13 can together enclose the movement space 18.

[0163] In some embodiments, the magnetic grating 84 may be fixed to the side of the first sidewall 12 or the second sidewall 13 facing the movement space 18. For example, the magnetic grating 84 may be fixed to the second sidewall 13. In other embodiments, the magnetic grating 84 may also be fixed to the top surface 111 of the base plate 11.

[0164] In some embodiments, the magnetic grating 84 may include a plurality of magnets with N (north) polarity and a plurality of magnets with S (south) polarity. The plurality of N-pole magnets and the plurality of S-pole magnets are arranged alternately in sequence along a first direction to form a periodically changing magnetic field.

[0165] In some embodiments, the base 1 can be a single structural component. Here, "two components forming a single structural component" means that during the formation of one of the two components, that component is connected to the other component without requiring further processing (such as bonding, welding, snap-fit ​​connections, or screw connections) to join the two components together. For example, the base plate 11, the first sidewall 12, the second sidewall 13, the first support portion 14, the second support portion 15, the third support portion 16, and the fourth support portion 17 can be integrally formed using injection molding.

[0166] Figure 7 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor 10 shown.

[0167] like Figure 7 As shown, m sets of magnetic units 4 can be fixed to the base 1. For example, the m sets of magnetic units 4 can be fixedly connected to the first circuit board 6 and located within the mounting groove 114. This reduces the height of the camera module 100 in the X-axis direction. The m sets of magnetic units 4 arranged along the first direction can form a magnetic array 9.

[0168] In other embodiments, m sets of magnet units may also be fixed to the first sidewall 12 or the second sidewall 13 of the base 1.

[0169] Figure 8a yes Figure 7 The diagram shows a partial structural schematic of one embodiment of the magnet array 9 shown from another angle. Figure 8b yes Figure 8a The diagram shown is a schematic representation of one embodiment of the structure at section line BB.

[0170] like Figure 8a and Figure 8b As shown, m groups of magnetic units 4 are arranged along the first direction. Each magnetic unit 4 may include at least two opposite polarity directions, and at least two polarity directions intersect the first direction. Understandably, the polarity direction can be from the North Pole (N) towards the South Pole (S), or from the South Pole (S) towards the North Pole (N).

[0171] The length of the magnet unit 4 in the first direction is k. Exemplarily, the magnet unit 4 may include one or more magnets.

[0172] In some embodiments, the magnetic 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 that of the second magnet 42. The polarity of one of the first magnet 41 and the second magnet 42 may be the north pole (N pole), and the polarity of the other may be the south pole (S pole). The polarity directions of the first magnet 41 and the second magnet 42 may both intersect the first direction. The sum of the lengths of the first magnet 41 and the second magnet 42 in the first direction is k.

[0173] It is understandable that the arrangement direction of the first magnet 41 and the second magnet 42 and the arrangement direction of the m groups of magnet units 4 may not be completely parallel. 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, which may be less than or equal to 10°. For example, the angle may be 2°3, 5° or 8°.

[0174] In some embodiments, the magnetic 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 that 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 all intersect the first direction. The sum of the lengths of the first magnet 41, the second magnet 42, and the third magnet 43 in the first direction is k.

[0175] In this way, the first magnet 41, the second magnet 42, and the third magnet 43 can form a Hellbeck magnet array. Understandably, compared to magnet array 9 which only has north and south pole magnets, the Hellbeck magnet array has a stronger magnetic field near the magnets.

[0176] 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 a 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 the first direction. The sum of the lengths of the first magnet 41, the second magnet 42, the third magnet 43, and the fourth magnet 44 in the first direction is k.

[0177] It is understandable that by setting the fourth magnet 44, the fourth magnet 44 can form a Heilbeck magnet array with the first magnet 41 and the second magnet 42 in the two adjacent magnet units 4, further enhancing the magnetic field strength near the m groups of magnet units 4.

[0178] like Figure 8a and Figure 8b As shown, the first magnet 41 and the second magnet 42 in the first set 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, the multiple NS magnetic fields arranged along the first direction constitute the magnetic field of the m sets of magnet units 4.

[0179] 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 0.5k. In this way, the magnetic field of the m sets of magnet units 4 is more uniformly distributed along the first direction.

[0180] 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.

[0181] In some embodiments, when the magnet unit 4 further includes a fourth magnet 44, the motor 10 may also 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 the fourth magnet 44 is adjacent to it. The magnetic field direction of the supplementary magnet 91 can be the same as the magnetic field direction of the first magnet 41, so that the supplementary magnet 91 can form a Heilbeck magnet array with the second magnet 42 and the fourth magnet 44 in the adjacent magnet unit 4. It is understood that by setting the supplementary magnet 91, the length of the magnetic field in the first direction can be further extended, effectively utilizing the fourth magnet 44 of the last group of magnet units 4.

[0182] For example, the m groups of magnetic units 4 may include 4 groups of magnetic units 4. It is understood that the length of the m groups of magnetic units 4 along the first direction can 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).

[0183] In other embodiments, the magnet unit 4 may also consist of a single magnet, and the magnet may include two parts with opposite polarities. The length of the magnet in the first direction is k.

[0184] Figure 9 yes Figure 3 The diagram shows a structural schematic of one embodiment of the carrier 2 shown. Figure 10 yes Figure 3 The diagram shows a partial structural view of the motor 10 at another angle.

[0185] like Figure 2 , Figure 9 and Figure 10As shown, the carrier 2 can be used to mount the first optical element 204. The carrier 2 includes a supporting surface 21, a bottom surface 22, a first side surface 23, a second side surface 24, and a back surface 25. The supporting surface 21, the bottom surface 23, and the back surface 25 are all connected between the first side surface 23 and the second side surface 24. The supporting surface 21 connects the bottom surface 22 and the back surface 25. The bottom surface 23 connects to the back surface 25. The supporting surface 21 can be arranged opposite to the bottom surface 22, and the first optical element 204 can be fixed on the supporting surface 21.

[0186] It is understood that the shape of the carrier 2 can be designed according to the shape of the first optical element 204. For example, when the first optical element 204 is a prism, the bearing surface 21 can be an inclined surface to match the shape of the prism. The light-reflecting surface of the prism can be fixed to the bearing surface 21.

[0187] For example, the carrier 2 may include a first side plate 26 and a second side plate 27, which are arranged at an angle. The prism may be mounted on the surface of the first side plate 26 away from the second side plate 27. The surface of the first side plate 26 away from the second side plate 27 may be the bearing surface 21 of the carrier 2. The surface of the second side plate 27 away from the first side plate 26 may be a portion of the bottom surface 22 of the carrier 2. It is understood that, compared to a scheme where the entire carrier 2 is located on one side of the prism and there is no overlap in the first direction, this embodiment, by having the first side plate 26 and the second side plate 27 arranged at an angle to form a slope to match the shape of the prism, can effectively utilize space and reduce the volume of the camera module 100. Furthermore, the connection area between the prism and the carrier 2 can be set to be larger, and the connection stability between the prism and the carrier 2 is also better.

[0188] In some embodiments, the carrier 2 further includes a first protrusion 28 and a second protrusion 29, which are arranged along a second direction. A first side plate 26 and a 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 a guide rod. The surface of the first protrusion 28 facing the base plate 11 and the surface of the second protrusion 29 facing the base plate 11 can be part of the bottom surface 22 of the carrier 2. The surface of the first protrusion 28 away from the second protrusion 29 can be the first side surface 23 of the carrier 2, and the surface of the second protrusion 29 away from the first protrusion 28 can be the second side surface 24 of the carrier 2. It is understood that, compared to the solution where a guide rod is connected to one side of the carrier 2, the technical solution of this embodiment connects the first protrusion 28 and the second protrusion 29 to both sides of the first side plate 26 and the second side plate 27, and slidably connects them to the base 1 via a guide rod. The prism is mounted on the first side plate 26. The carrier 2 is connected to the guide rod 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.

[0189] In some embodiments, the magnetic clasp 85 can be fixed to the bottom surface 22 of the carrier 2. The magnetic clasp 85 can be made of metal. For example, the magnetic clasp 85 can be fixed to one side surface of the second side plate 27, which is the same as the first side plate 26.

[0190] 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 bearing surface 21. In this case, the shape of the carrier 2 can be designed according to the specific shape of the lens assembly, and this application does not limit it. Figure 9 and Figure 10 The shape of carrier 2 shown.

[0191] Figure 11 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor 10 shown. Figure 12 yes Figure 3 A partial structural schematic diagram of one embodiment of the motor 10 shown.

[0192] like Figure 11 and Figure 12 As shown, n coils 3 can be fixed to the bottom surface 22 of the carrier 2. Exemplarily, the n coils 3 can be fixed to the surface of the second side plate 27 away from the first side plate 26. The tunneling magnetoresistance effect (TMR) sensor 83 can be fixed to the second side surface 24 of the carrier 2.

[0193] 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 power the n coils 3 and the TMR sensor 83. Exemplarily, the second circuit board 7 can be partially 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.

[0194] In some implementations, the second circuit board 7 may be a flexible circuit board or a rigid-flex circuit board.

[0195] Figure 13 yes Figure 3 The diagram shows a partial structural view of the motor 10 from another angle. Figure 14 yes Figure 13 The diagram shows a partial cross-sectional view of one embodiment of the structure at section line CC.

[0196] like Figure 13 and Figure 14 As shown, one end of the electrical connector 5 can be fixed to the base 1 and electrically connected to the first circuit board 6, while the other end can be fixed to the carrier 2 and electrically connected to the second circuit board 7. The electrical connector 5 can be electrically connected to the coil 3 and the TMR sensor 83 via the second circuit board 7.

[0197] Coil 3 can be fixed to carrier 2. m sets of magnetic units 4 can be fixed to base 1. n coils 3 are arranged facing m sets of magnetic units 4. The plane in which the wires of the coil 3 are wound is the winding plane of the coil 3. n coils 3 facing m sets of magnetic units 4 means that the winding plane of the coil 3 faces m sets of magnetic units 4. For example, n coils 3 can be fixed to the bottom surface 22 of carrier 2, and m sets of magnetic units 4 can be fixed to the base plate 11 of base 1.

[0198] In some embodiments, the motor 10 may further include a magnet housing 49, which can be fixed to the base 1. m sets of magnet units 4 are installed in the magnet housing 49. Thus, when installing the m sets of magnet units, the m sets of magnet units 4 can be installed inside the magnet housing 49 first to form a whole, and then the whole assembly can be installed onto the base 1.

[0199] In other embodiments, the n coils 3 can also be fixed to the first side 23 or the second side 24 of the carrier 2. Correspondingly, the m sets of magnetic units 4 can 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 sets of magnetic units 4.

[0200] In other embodiments, the motor 10 may include 2n coils and 2m sets of magnet units. Specifically, n coils 3 may be fixed to the first side 23 of the carrier 2, and 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. Alternatively, n coils 3 may be fixed to the second side 24 of the carrier 2, and 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.

[0201] Figure 15 yes Figure 14 An assembly diagram of one embodiment of the structure shown. Figure 16 yes Figure 15 The diagram shown is a schematic representation of one embodiment of the structure at section line DD. The following description, in conjunction with the accompanying drawings, illustrates the movement of n coils 3 under the influence of a magnetic field after energization. For ease of description and understanding, Figure 15 The dashed lines in the diagram indicate the positions of the n coils 3 after they have moved a distance B in the first direction. Figure 16 Arrows indicate the polarity of the first magnet 41, the second magnet 42, the third magnet 43, and the fourth magnet 44. The arrows combined with curves indicate the approximate distribution and direction of the magnetic field lines. Based on the principle of "fork in, point out" in physics, "·" and "ⅹ" indicate the direction of the current in coil 3. "·" indicates the current direction is perpendicular to the cross-section outwards, and "ⅹ" indicates the current direction is perpendicular to the cross-section inwards.

[0202] like Figures 15 to 16 As shown, the n coils 3 may include a first coil 31, a second coil 32, and a third coil 33, which are spaced apart and insulated from each other along a first direction. The magnet array 9 includes four sets of magnet units 4 and supplementary magnets 91. The magnet unit 4 may include a first magnet 41, a second magnet 42, a third magnet 43, and a fourth magnet 44.

[0203] The m groups of magnet units 4 form a magnetic field whose magnitude and orientation change periodically in the first direction. For example, the period of the magnetic field change 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.

[0204] Figure 17 yes Figure 15The diagram illustrates one embodiment of the force exerted on the first coil 31 when it moves along a first direction while the current direction remains unchanged. It is understood that in the coordinate system, the horizontal axis represents the displacement of the first coil 31 along the first direction, which can refer to the distance between the current position of the first coil 31 and its initial position along the first direction. The initial position of the first coil 31 refers to its position before energization. The vertical axis represents the magnitude and direction of the force acting on the first coil 31. The sign of the vertical axis indicates the direction of the force, and the absolute value of the vertical axis indicates the magnitude of the force.

[0205] like Figures 15 to 17 As shown, when the current direction remains constant, the magnitude and direction of the force acting on the first coil 31 as it moves along the first direction change periodically with displacement. The period of the force can be k, where k is the length of the magnetic unit 4 in the first direction. The interval between two changes in the direction of the force is 0.5k. It can be understood that, according to... Figure 17 Analysis shows that the direction of the current can be changed so that the force on the n coils after they are energized is always positive or negative, that is, the force on the n coils 3 is always in one direction. For example, alternating current can be passed through the n coils 3. 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 on the coils 3 can be changed in conjunction with the direction of the magnetic field, so that the force on the coils 3 in the magnetic field is always in one direction. After the n coils are energized with alternating current, they can move along the first direction in conjunction with the magnetic field of the m sets of magnet units 4, thereby driving the carrier 2 to move relative to the base 1 in the first direction.

[0206] It is understandable that 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 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 understood that the movement of the carrier 2 along the first direction includes both forward and backward movements. When the carrier 2 moves forward, the light-emitting surface 241 of the prism carried on the carrier 2 (e.g., ...) Figure 2 As shown, the distance between the light-emitting surface 241 of the prism carried on the carrier 2 and the imaging surface decreases. The carrier 2 moves backward, and the distance between the light-emitting surface 241 of the prism carried on the carrier 2 and the imaging surface increases.

[0207] like Figure 17 As shown, when the direction of the current flowing through the first coil 31 remains unchanged, the direction of the force on the first coil 31 reflects the magnetic field strength and direction at its location. It can be understood that the first coil 31 is subjected to the N-S magnetic field formed by multiple magnetic units 4 within the m-group of magnetic units 4. The magnetic field strength and direction at the location of the first coil 31 are schematic representations of the total magnetic field strength and direction under the influence of multiple magnetic fields. The force on the first coil 31 is also a schematic representation of the resultant force under the influence of multiple N-S magnetic fields.

[0208] When n coils 3 are energized and move along the first direction, they cut magnetic field lines within the magnetic field of m sets of magnet units 4, and are subjected to Ampere force. During the movement of the n coils 3, the direction of the Ampere force is influenced by both the direction of the current in the first coil 31 and the direction of the magnetic field at the position of the first coil 31 at that moment. To ensure that the Ampere force on the coils 3 is directed in a predetermined direction, the direction of the current in the n coils 3 can be adjusted according to the magnetic field distribution at different positions during the movement of the coils 3 in the first direction.

[0209] The following section uses the first coil 31 as an example to illustrate the coordination of current and magnetic field when n coils 3 move. It is understandable that... Figure 17 and Figure 18 The diagrams illustrate the partial displacement and force conditions of the first coil 31 in the magnetic field.

[0210] Figure 18 yes Figure 16 The diagram illustrates one embodiment of the current and force distribution of the first coil 31 during its movement. In the coordinate system, the horizontal axis represents the displacement of the first coil 31. The horizontal line represents the current in the first coil 31, and the sign of the vertical axis indicates the direction of the current. The absolute value of the vertical axis represents the magnitude of the current in the first coil 31. The curve represents the force on the first coil 31. The sign of the vertical axis indicates the direction of the force on the first coil 31, and the absolute value of the vertical axis represents the magnitude of the force on the first coil 31.

[0211] like Figure 17 and Figure 18 As shown, when the magnetic field direction at the position of the first coil 31 is negative, a negative current is supplied to the first coil 31, making the force on the first coil 31 positive. When the magnetic field direction at the position of the first coil 31 is positive, a positive current is supplied to the first coil 31, making the force on the first coil 31 positive.

[0212] Understandably, during the movement of the first coil 31, a current whose direction changes with displacement is supplied to the first coil 31, ensuring that the Ampere force on the first coil 31 remains positive. The direction of this Ampere force can be the forward direction of the carrier 2. Thus, by changing the direction of the current on the first coil 31, the force on the first coil 31 can be directed towards the forward direction. In other embodiments, the direction of the current on the first coil 31 can also be changed to make the Ampere force on the first coil 31 negative, thus directing the force on the first coil 31 towards the backward direction.

[0213] For example, when the first coil 31 moves 0.5k along the first direction, the direction of the current changes. It can be understood that the magnetic field of the m groups of magnet units 4 changes direction every 0.5k along the first direction, so that the direction of the current also changes when it moves 0.5k. The direction of the current can match the changing pattern of the magnetic field direction, so that the force on the first coil 31 is always in one direction.

[0214] The energizing method and force conditions of the second coil 32 and the third coil 33 when they move in the magnet array 9 can be compared with those 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 any given moment, the direction of the Ampere force on the first coil 31, the second coil 32, and the third coil 33 is the same. In this way, during 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 relatively high.

[0215] like Figure 15 As shown, the distance A between the centerlines of two adjacent coils 3 in the first direction satisfies: nA = jk, where j is a positive integer. The centerline of coil 3 is parallel to the winding plane of coil 3 and perpendicular to the first direction. It can be 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 sets of magnetic units 4 form a magnetic field whose magnitude and direction change periodically in the first direction. The period of the magnetic field change can be k. After n coils 3 are translated nA along the first direction, the magnetic field strength and direction of the n coils 3 at the positions before and after the translation can be the same. If the magnitude and direction of the current on the n coils 3 at the positions before and after the translation can be set to be the same, the magnitude and direction of the Ampere force on the n coils 3 can also be the same. An alternating current with a period of nA can be passed through the n coils 3, so that when the n coils 3 move along the first direction, under the cooperation of the alternating current with a period of nA and the magnetic field of the m sets of magnetic units 4, the n coils 3 can continuously move along the first direction. Furthermore, when designing AC current, it is sufficient to design a current direction with a period of nA, rather than designing currents for n coils 3 moving all distances along the first direction, which can reduce the design difficulty.

[0216] For example, the n coils 3 include a first coil 31, a second coil 32 and a third coil 33, where n = 3. Figure 15 The first coil 31, the second coil 32, and the third coil 33 at the first moment are illustrated by solid lines. Figure 15The first coil 31, the second coil 32, and the third coil 33 at the second time point are illustrated by dashed lines. Along the first direction, the distance between the first position Q1 and the second position Q2 is B = 3A = 2k.

[0217] like Figures 15 to 17 As shown, the magnetic field direction of the first coil 31 at the first position Q1 is the same as the magnetic field direction 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. Thus, the magnitude and direction of the current in the first coil 31 can be set to be the same at both positions Q1 and Q2, and the magnitude and direction of the Ampere force acting 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 in the first coil 31 can change with the displacement, and the period of the current in the first coil 31 can be equal to the length k of a set of magnetic units 4. Therefore, supplying a periodic current to the first coil 31 is beneficial for achieving long-distance movement of the first coil 31.

[0218] In some embodiments, the length of m sets of magnet units 4 in the first direction can be greater than or equal to 9000 micrometers (μm). In this way, n coils 3 can drive the carrier 2 to move a large distance relative to the base 1 in the first direction.

[0219] In some implementations, the length of 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, ... Figure 16 As shown, when the first coil 31 moves in the magnetic field, the two straight sections 311 on both sides 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 both sides of the first coil 31 can be located within two adjacent magnetic field ranges. When a positive current is applied to the first coil 31, the straight section 311 on the left side of the first coil 31, under the action of the first magnetic field, can be subjected to a force towards the right. The straight section 311 on the left side of the first coil 31, under the action of the second magnetic field, can also be subjected to a force towards the right. This avoids the straight sections 311 on both sides of the first coil 31 being in the same magnetic field direction, which would cause the forces on the two straight sections 311 to be opposite and cancel each other out, reducing the working efficiency of the first coil 31. The length of the first coil 31 in the first direction is less than k, which avoids the first coil 31 spanning three or more magnetic fields, causing the magnetic field between the two straight sections 311 on both sides of the first coil 31 to be ineffective. The length of the first coil 31 in the first direction is less than k, which requires less space for the first coil 31 and helps to reduce the size of the motor.

[0220] It is understandable that the n coils 3 are in different positions in the magnetic field of the m sets of magnet units 4 at a certain moment. The direction and intensity of the magnetic field at each position of the n coils 3 can also be different. The current flowing through the n coils 3 can have a phase difference, so that when the n coils move along the first direction, the force on the n coils is all in the same direction.

[0221] The following section, in conjunction with the accompanying drawings, describes the energization and force conditions of the n coils 3 when the n coils 3 and m sets of magnet units move in the first direction.

[0222] Figures 19 to 26 This is a schematic diagram showing the relative positions of n coils 3 and the 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 sets of magnet units 4. Each magnet unit 4 includes a first magnet 41 and a second magnet 42. It is understood that... Figures 19 to 26 The same structure is illustrated in the diagram. For simplicity, it is shown in... Figure 19 The various structures are labeled in the text. Figures 20 to 26 The structures in the text are not labeled.

[0223] like Figures 19 to 26 As shown, n coils 3 at Figure 19 The position shown is moved to Figure 20 The position shown has been moved by 0.25A along the first direction. n coils 3 at... Figure 20 The position shown is moved to Figure 21 The position shown has been moved by 0.5A along the first direction. n coils 3 at... Figure 21 The position shown is moved to Figure 22 The position shown has been moved by 0.5A along the first direction. n coils 3 at... Figure 22 The position shown is moved to Figure 23 The position shown has been moved by 0.5A along the first direction. n coils 3 at... Figure 23 The position shown is moved to Figure 24 The position shown has been moved by 0.5A along the first direction. n coils 3 at... Figure 24 The position shown is moved to Figure 25 The position shown has been moved by 0.5A along the first direction. n coils 3 at... Figure 25 The position shown is moved to Figure 26 The position shown has been moved by 0.25A along the first direction.

[0224] n coils 3 at Figure 19 The position shown is moved to Figure 26The position shown indicates a total movement of 3A along the first direction. The first coil 31 passes through two sets of magnetic units 4, where 3A = 2k. For example, the distance between the center lines of adjacent coils 3 is A = 2.5mm. The width of one set of magnetic units 4 is k = 3.75mm. 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, and the length of the first magnet 41 in the first direction is 0.5k = 0.75A = 1.875mm.

[0225] Figure 27 The first coil 31, the second coil 32, and the third coil 33 are in the following... Figure 19 As for Figure 26 This is a schematic diagram illustrating the energization process of one embodiment during the movement of the coil 31. 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 coil 31 along a first direction. The sign of the vertical axis indicates the direction of the current. The absolute value of the vertical axis represents the magnitude of the current.

[0226] like Figure 27 As shown, the current in any one of the n coils 3 changes direction every 0.5k. For example, taking the first coil 31 as an example, at the horizontal coordinate of 0.9375mm, the current in the first coil 31 changes from negative to positive, indicating a commutation. At the horizontal coordinate of 2.8125mm, the current in the first coil 31 changes from positive to negative, indicating another commutation. The interval between the two commutations is 1.875mm = 0.5k.

[0227] Figure 28 There are n coils in 3 such Figure 27 The diagram illustrates one implementation of the displacement and force relationship under the energized state. Figure 28 The Ampere force (1 force) on the first coil 31, the Ampere force (2 force) on the second coil 32, the Ampere force (3 force) on the third coil 33, and the resultant force of the three (three-phase resultant force) are distinguished by different types of lines. Figure 19 The position of the first coil shown corresponds to Figure 28 The horizontal axis is at 0mm.

[0228] like Figure 28 As shown, after energization, the Ampere force on the first coil 31 changes periodically with displacement, the Ampere force on the second coil 32 changes periodically with displacement, and the Ampere force on the third coil 33 changes periodically with displacement. Taking the first coil 31 as an example, during the movement along the first direction, the period X of the Ampere force change on the first coil 31 is 1.875mm = 0.5k.

[0229] like Figure 27and Figure 28 As shown, the phase difference of the current flowing through the n coils 3 is 360° / n. For example, in the first coil 31, the second coil 32, and the third coil 33, the phase difference of the current flowing between any two coils is 360° / 3 = 120°. 360° can represent the displacement X (X is 1.875) required for one cycle of force change in the coil 3. For example, Figure 27 In the circuit, the phase difference between the currents in the first coil 31 and the third coil 33 is 0.625 mm. The phase difference between the second coil 32 and the third coil 33 is also 0.625 mm.

[0230] Figure 29 The first coil 31, the second coil 32, and the third coil 33 are in the following... Figure 19 As for Figure 26 A schematic diagram of an alternative implementation of the movement process.

[0231] like Figure 28 and Figure 29 As shown, the n coils 3 include first-type coils and second-type coils. The first-type coil is the one with the lowest magnetic field strength at a given moment among the n coils 3. The second-type coils are all the coils 3 except for the first-type coils. The first-type coils are de-energized, and the second-type coils are energized. The magnetic field strength at the location of the second-type coils is greater than that at the location of the first-type coils. It can be understood that when the current flowing through the n coils 3 remains constant, the coil 3 located at the location with the greater magnetic field strength experiences a greater force. Choosing to energize the second-type coils, which experience a greater force, and de-energizing the less efficient first-type coils helps reduce the power consumption of the motor 10.

[0232] It is understandable that when the n coils 3 move along the first direction, there is a coil with the lowest magnetic field strength at any given time among the n coils 3. This coil is not a fixed coil, but is determined by the position of each of the n coils.

[0233] For example, the n coils 3 include a first coil 31, a second coil 32, and a third coil 33, as shown below. Figure 28 As shown, within the range of x-coordinate greater than 0 mm and less than 0.625 mm, according to Figure 28 The Ampere force of the second coil 32 is less than that of the first coil 31, and the Ampere force of the second coil 32 is less than that of the third coil 33. Therefore, the magnetic field strength at the locations of the first coil 31 and the third coil 33 is greater than that at the location of the second coil 32. The second coil 32 is a type I coil. The first coil 31 and the third coil 33 are type II coils. The second coil 32 can be de-energized within a range of 0 mm to 0.625 mm on the horizontal axis.

[0234] Two of the first coil 31, the second coil 32, and the third coil 33 are type I coils, and the other is type II coil. Within one force cycle, the ratio of the energized displacement to the de-energized displacement of each coil 3 is 2:1. For example, the ratio of the displacement of the first coil 31 when energized to its displacement when de-energized in the first direction is 2:1. For example, the displacement range of 0 mm to 1.875 mm constitutes one force cycle of the first coil 31. The first coil 31 is energized during the displacement range of 0 mm to 0.625 mm. The first coil 31 is de-energized during the displacement range of 0.625 mm to 1.25 mm. The first coil 31 is energized during the displacement range 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 a ratio of 1.25 mm to 0.625 mm of 2:1.

[0235] And / or, the ratio of the displacement of the second coil 32 when energized in the first direction to its displacement 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 its displacement when de-energized is 2:1.

[0236] In some embodiments, the phase difference of the currents flowing through the n coils 3 is 360° / n. For example, when one coil 3 is de-energized and the remaining coils 3 are energized, the phase difference of the currents flowing through two coils in the first coil 31, the second coil 32, and the third coil 33 satisfies 360° / 3 = 120°. 360° can represent the displacement X (X is 1.875) required for one cycle of force change in the coil 3. The phase difference ΔT of the currents flowing through 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 also 0.625mm.

[0237] In other embodiments, at any position, any one of the three coils, namely the first coil 31, the second coil 32, and the third coil 33, may be energized while the remaining two coils are de-energized.

[0238] Figure 30 This is a schematic diagram of another implementation of the current carrying coil 3. Figure 31 This is a schematic diagram of another implementation of the current carrying coil 3.

[0239] It is understood that in the previous embodiments, the current in coil 3 was described using a square current as an example. A square current refers to a current whose magnitude remains constant while its direction changes periodically. In other embodiments, the current in coil 3 can also be a sinusoidal current (such as...). Figure 30 (as shown) or triangular wave current (such as) Figure 31 (as shown in the image) etc.

[0240] Figure 32 yes Figure 14 The diagram shows an assembly schematic of another embodiment of the coil 3 and magnet unit 4 shown.

[0241] like Figure 32 As shown, m magnet units 4 constitute a magnet array 9, and the motor 10 may include multiple magnet arrays 9, which can be arranged along the second direction. Figure 32 The diagram illustrates two magnet arrays 9. Along the second direction, the length of coil 3 is greater than the length of the magnet.

[0242] Figure 33 yes Figure 14 The diagram shows an assembly schematic of another embodiment of the coil 3 and the magnet unit 4 shown.

[0243] like Figure 33 As shown, the motor 10 may include multiple magnet arrays 9, which may be arranged along the second direction. Figure 32 The diagram illustrates two magnet arrays 9. N coils 3 form a coil group 34 along a first direction. The motor 10 may include multiple coil groups 34. The multiple coil groups 34 are arranged along a second direction. Figure 32 The diagram illustrates two coil groups 34. The two coil groups 34 and the two magnet arrays 9 are arranged opposite each other in a one-to-one correspondence along the second direction.

[0244] Figure 34 yes Figure 14 The diagram shows an assembly schematic of another embodiment of the coil 3 and the magnet unit 4 shown.

[0245] like Figure 34 As shown, n coils 3 constitute a coil group 34, and the motor 10 may include multiple coil groups 34. The multiple coil groups 34 are arranged along the second direction. Figure 32 The diagram illustrates two coil groups 34. The two coil groups 34 are positioned opposite to the magnet array 9.

[0246] It is understandable that the motor 10 also includes multiple magnet arrays 9 and / or multiple coil groups 34, the specific number and correspondence of which can be designed according to requirements.

[0247] The following describes several implementation methods of the electrical connector 5 with reference to the accompanying drawings.

[0248] like Figure 13As shown, one end of the electrical connector 5 can be fixed to the base 1 and electrically connected to the first circuit board 6, while the other end can be fixed to the carrier 2 and electrically connected to the second circuit board 7. The electrical connector 5 can be electrically connected to the coil 3 and the TMR sensor 83 via the second circuit board 7. 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.

[0249] The electrical connector 5 can be deformable. When the n coils 3 drive the carrier 2 to move along the first direction, the electrical connector 5 can deform, thereby supplying power to the coils 3 during the movement.

[0250] In some embodiments, the first end 51 of the electrical connector 5 may be fixed to the second sidewall 13 of the base 1. In other embodiments, the first end 51 of the electrical connector 5 may also be fixed to the first sidewall 12 of the base 1. Alternatively, the first end 51 of the electrical connector 5 may be partially located between the second and third support portions, electrically connecting to the first circuit board 6, and fixed to the base plate 11 of the base 1.

[0251] 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.

[0252] 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.

[0253] 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.

[0254] Exemplarily, the electrical connector 5 may further include an extension 53 connected between the first end 51 and the second end 52, and electrically connecting the first end 51 and the second end 52. The extension 53 may be disposed opposite to the back surface 25 of the carrier 2. The length of the extension 53 may be greater than the distance between the first end 51 and the second end 52. The extension 53 may be used to extend the length of the electrical connector 5 and reduce the K value of the electrical connector 5. Figure 13 and Figure 14As shown, when the coil 3 drives the carrier 2 to move along the first direction, the extension 53 can be stretched and deformed. This prevents the electrical connector 5 from detaching from the carrier 2 due to an excessively long movement path, which could lead to a power outage between the electrical connector 5 and the second circuit board 7, thus de-energizing the coil 3 and affecting the operation of the motor 10. It is understood that by providing the extension 53, the K value of the electrical connector 5 can be reduced, resulting in better reliability of the electrical connection between the electrical connector 5 and the second circuit board 7.

[0255] In some embodiments, the K value of the electrical connector 5 is less than 10 millinewtons per millimeter (mN / mm). It is understood that by setting the K value of the electrical connector 5 within a small range, the electrical connector 5 provides less resistance to the movement of the carrier 2 when the carrier 2 moves along the first direction, and the power consumption of the motor 10 is lower.

[0256] Figure 35 yes Figure 13 A schematic diagram of another embodiment of the electrical connector 5 shown.

[0257] In some embodiments, the extension 53 can be a spiral structure (e.g., Figure 13 (as shown) or a broken line structure (such as...) Figure 35 (As shown). A spiral or zigzag structure can be used to extend the length of the extension 53 and reduce the K value of the electrical connector 5. The shape of the extension 53 can be designed according to actual needs, and this application does not impose any restrictions.

[0258] In some embodiments, the broken line structure of the extension 53 may include, but is not limited to: continuous “S” structure, continuous “V” structure, continuous “M” structure, continuous “N” structure, continuous “W” structure, etc.

[0259] Figure 36a yes Figure 13 A schematic diagram of another embodiment of the electrical connector 5 shown.

[0260] In some embodiments, the extension 53 may be as follows: Figure 13 The single-line structure shown can also be as follows: Figure 36a The multi-line structure shown. (Example) Figure 36a As shown, the extension 53 may include a plurality of signal transmission structures 531, which are spaced apart from each other. It is understood that the plurality of signal transmission structures included in the extension 53 are not limited to those shown below. Figure 36a The two shown can also be more than two; this application does not impose any restrictions.

[0261] In some embodiments, the extension 53 may be a trace suspend assembly (TSA). One end of the TSA is fixed to the base 1 and electrically connected to the first circuit board 6, and 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.

[0262] Figure 36b yes Figure 13 A partial structural schematic diagram of another embodiment of the electrical connector 5 shown. Figure 36c yes Figure 36b The extension 53 shown is a partial cross-sectional view of one embodiment of section line JJ.

[0263] like Figure 36b and Figure 36c As shown, the extension 53 can be layered along its thickness direction, and may include multiple spaced-apart layer structures. For example, the extension 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 53.

[0264] Exemplarily, 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 transmit signals to a coil 3 (e.g.,...). Figure 4 (as shown) and TMR sensor 83 (as shown) Figure 4 (As shown) Power supply and transmission of electrical signals. The first insulating layer 3511 is used to insulate and protect the first trace 3512. The second insulating layer 3521 is used to insulate and protect the second trace 3522. The third insulating layer 3531 is used to insulate and protect the third trace 3532.

[0265] 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 arrangement of the second insulating layer 3521 and the second trace 3522 can refer to the arrangement of the first insulating layer 3511 and the first trace 3512. The third insulating layer 3531 and the third trace 3532 can refer to the arrangement of the first insulating layer 3511 and the first trace 3512. Further details are omitted here.

[0266] 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 can be set according to requirements.

[0267] For example, the formula for calculating the value of K is as follows:

[0268]

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

[0270] It is understandable that when the length and width remain constant, the K value is proportional to the cube of the thickness.

[0271] For example, the thickness of the extension 53 before layering can be 4.5 mm, and 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 53 after layering is slightly greater than the thickness before layering to ensure reliable insulation protection of the wiring by the insulation layer.

[0272] For example, before the extension 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]

[0274] Obviously, after the extension 53 is layered, although the sum of the thickness of the first layer 351, the second layer 352, and the third layer 353 of the extension 53 is slightly greater than the thickness of the extension 53 between the layers, the K value of the extension 53 after the layering is significantly reduced.

[0275] It is understandable that, compared to the scheme in which the first layer 351, the second layer 352, and the third layer 353 are connected to each other, dividing the extension 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 movement of the carrier 2 by the electrical connector 5 when the carrier 2 moves along the first direction, and is beneficial to reducing the power consumption of the motor 10.

[0276] For example, the K value of the electrical connector 5 can be 0.1mN / mm, 0.2mN / mm, 0.5mN / mm, 0.8mN / mm, 1.2mN / mm, 1.5mN / mm, 2mN / mm, etc.

[0277] In other embodiments, the extension 53 may also be provided in two layers or three or more layers, and is not limited to these. Figure 36b The three layers shown.

[0278] In other embodiments, the extension 53 may be partially layered along its length and partially unlayered. For example, the extension 53 may be provided with a connecting structure (not shown), which may be partially fixed between the first layer 351 and the second layer 352, and partially fixed between the second layer 352 and the third layer 353.

[0279] Figure 37 yes Figure 13 The structure shown is a partial cross-sectional view of one embodiment at section line EE.

[0280] like Figure 37 As shown, the metal magnetic chuck 85 can be fixed to the bottom surface 22 of the carrier 2 and is positioned opposite to the magnetic unit 4. In this way, there is an attractive force between the magnetic chuck 85 and the magnetic unit 4 in the X direction, which can limit the movement of the carrier 2 in the X-axis direction.

[0281] In some embodiments, the magnetic accumulator 85 can be a circular or ring-shaped structure. The thickness direction of the magnetic accumulator 85 is set to be parallel to the X-axis direction. This avoids excessive interference forces in the non-operating direction between the magnetic accumulator 85 and the magnetic unit 4. The operating direction refers to the direction in which the magnetic accumulator 85 faces the magnetic unit 4.

[0282] Figure 38 yes Figure 3 The diagram shows a partial structural schematic of one embodiment of the motor 10 shown from another angle. Figure 39 yes Figure 38 The diagram shows a cross-sectional view of one embodiment of the motor 10 at section line FF.

[0283] like Figure 38 and Figure 39As shown, the carrier 2 is slidably connected to the first guide rod 81 and the second guide rod 82. The length directions of the first guide rod 81 and the second guide rod 82 can be parallel to the first direction. It can be understood that by setting the length directions of the first guide rod 81 and the second guide rod 82 to be parallel to the first direction, when the carrier 2 moves along 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, preventing misalignment during movement and ensuring rapid and stable movement of the carrier 2.

[0284] It is understandable that, due to assembly tolerances or manufacturing precision, in actual products, the length direction of the first guide rod 81 and the first direction are allowed to have an angle of less than 10°.

[0285] For example, the bottom surface 22 of the carrier 2 may be provided with a first sliding groove 221 and a second sliding groove 222. The first sliding groove 221 and the second sliding groove 222 are spaced apart. The first guide rod 81 is slidably connected in the first sliding groove 221, and the second guide rod 82 is slidably connected in the second sliding groove 222. The first sliding groove 221 and the second sliding groove 222 can serve as positioning structures for the first guide rod 81 and the second guide rod 82, facilitating quick positioning and installation between the carrier 2 and the first guide rod 81 and the second guide rod 82.

[0286] For example, the first groove 221 may be located on the first protrusion 28. The second 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.

[0287] In some embodiments, the first 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, enabling rapid positioning of the carrier 2 in the Y-axis direction during the assembly process of the carrier 2 with the first guide rod 81 and the second guide rod 82. When the actual product size of the first guide rod 81 is slightly larger than the design size due to tolerance, the first guide rod 81 can still be assembled within the "V"-shaped structure 2211, which can also be used for tolerance.

[0288] In some embodiments, the second groove 222 includes a U-shaped structure 2212, within which the second guide rod 82 is slidably connected. In some embodiments, the groove 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 manufacturing error in the carrier 2, ensuring that even if the size of the carrier 2 slightly increases or decreases due to manufacturing errors, the carrier 2 can still be successfully slidably connected to the first guide rod 81 and the second guide rod 82. The U-shaped structure 2212 improves the tolerance for errors and helps save production costs.

[0289] Figure 40 yes Figure 38 The diagram shows a cross-sectional view of one embodiment of the motor 10 at section line GG.

[0290] like Figures 38 to 40 As shown, there are two "V"-shaped structures 2211, located at positions P1 and P2 respectively. Exemplarily, the middle of the first groove 221 can be recessed to form a first clearance groove 2213, and the first guide rod 81 can be spaced apart from the wall of the first clearance groove 2213, so that two "V"-shaped structures 2211 are located at both ends of the clearance groove. It can be understood that both ends of the first guide rod 81 contact and engage with the "V"-shaped structures 2211 (e.g., ...). Figure 20 In other places, there is no contact with the first slide groove 221, thereby preventing the carrier 2 from being unsmooth and unstable 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 would lead to poor stability of the carrier 2 during movement.

[0291] Figure 41 yes Figure 38 The diagram shows a cross-sectional view of the motor 10 at section line HH in one embodiment.

[0292] like Figure 38 , Figure 39 and Figure 41As shown, there is one "U"-shaped structure 2212, located at position P3. Exemplarily, the two ends of the second sliding groove 222 can be recessed to form a second clearance groove 2221 and a third clearance groove 2222. The second guide rod 82 can be spaced apart from the walls of the second clearance groove 2221 and the third clearance groove 2222. The second clearance groove 2221 and the third clearance groove 2222 can be located at both ends of the "U"-shaped structure 2212. It is understood that the middle part of the second guide rod 82 contacts and engages with the "U"-shaped structure 2212, while other parts do not contact the second sliding groove 222. This prevents excessive friction due to an excessively large contact area between the carrier 2 and the second guide rod 82, which could lead to uneven movement and poor stability of the carrier 2 during movement. It also avoids poor flatness of the contact surfaces between the carrier 2 and the second guide rod 82, which could also result in poor stability of the carrier 2 during movement.

[0293] like Figure 38 As shown, a U-shaped structure 2212 ( Figure 38 (at position P1 in the middle) and two "V" shaped structures 2211 ( Figure 38 Positions P2 and P3 can be connected sequentially to form a triangle. In other words, the three connection points between the carrier 2 and the first guide rod 81 and the second guide rod 82 can be connected sequentially to form a triangle. The projection of the center O of the carrier 2 onto the plane containing the triangle 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 swaying during movement.

[0294] like Figure 38 As shown, the buffer 86 is fixed to the base 1, and the buffer 86 and the carrier 2 are arranged opposite to each other along the first direction. The buffer 86 is flexible. Thus, when the carrier 2 moves along the first direction or collides with the base 1 during a reliability test, the buffer 86 can absorb the deformation impact energy, reducing the damage to the carrier 2 caused by the collision impact. The material of the buffer 86 can be a material with a modulus much smaller than that of the carrier 2, thereby helping to protect the carrier 2 and the structures disposed on the carrier 2. For example, when the carrier 2 is made of rigid plastic, the material of the buffer 86 can be a soft and easily deformable material such as rubber, silicone, Mylar sheet, or foam.

[0295] like Figure 39As shown, the magnetic grating 84 can be fixed to the second sidewall 13 of the base 1. The TMR sensor 83 can be fixed to the second sidewall 24 of the carrier 2 and is positioned opposite to the magnetic grating 84. It is 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) of the camera module, and the controller can then adjust the current of the carrier 2. The TMR sensor 83 has advantages such as high accuracy, high sensitivity, low power consumption, small size, good temperature stability, and a wide operating temperature range.

[0296] In some implementations, the same content as in the previous embodiments will not be repeated. Figure 42 yes Figure 2 The diagram shows a structural schematic of another embodiment of the motor 10 shown. Figure 43 yes Figure 41 An exploded view of one embodiment of the motor 10 shown. Figure 44 yes Figure 42 The motor 10 shown is a cross-sectional schematic diagram of one embodiment at section line II.

[0297] like Figures 42 to 44 As shown, the motor 10 may include a base 1, a carrier 2, n coils 3, m sets of magnet units 4, electrical connectors 5, a first circuit board 6, a second circuit board 7, a first ball bearing 98, a second ball bearing 99, a tunnel magnetoresistive sensor 83, a magnetic grating 84, a magnetic absorbing plate 85, and a buffer 86. The arrangement of the n coils 3, m sets of magnet units 4, electrical connectors 5, first circuit board 6, second circuit board 7, tunnel magnetoresistive sensor 83, magnetic grating 84, magnetic absorbing plate 85, and buffer 86 can refer to the arrangement of the motor 10 described above, and will not be repeated here.

[0298] The first ball bearing 98 and the second ball bearing 99 are fixedly connected to the bottom surface 22 of the carrier 2 at intervals along a second direction. The second direction may intersect with the first direction. For example, the first ball bearing 98 may be fixed to the first protrusion 28. The second ball bearing 99 may be fixed to the second protrusion 29. The first ball bearing 98 and the second ball bearing 99 are slidably connected to the base plate 11 of the base 1. The carrier 2 can be slidably connected to the base 1 via the ball bearings. It is understood that compared to using a guide rod to achieve the slidable connection of the carrier 2 to the base 1, using ball bearings can reduce the area of ​​the slidable connection, which is beneficial to reducing frictional resistance.

[0299] In some embodiments, the coil 3 can be fixed to the bottom surface 22 of the carrier 2. The first ball bearing 98 and the second ball bearing 99 are located on both sides of the coil 3 and are spaced apart from the coil 3. When the first ball bearing 98 and the second ball bearing 99 are slidably connected to the base 1, they can provide support for the carrier 2 on both sides of the coil 3.

[0300] In some embodiments, the base plate 11 of the base 1 may be provided with a third groove 19. The first ball 98 is slidably connected to the third groove 19. The first ball 98 and the third groove 19 can serve as a convex-concave mating structure to help position the carrier 2 and the base 1 when the carrier 2 is installed on the base 1.

[0301] This application, in conjunction with the accompanying drawings, describes several motors 10 used in a camera module 100. The motor may include a base 1, a carrier 2, n coils 3, and m sets of magnetic units 4. One of the magnetic units 4 and coils 3 is fixed to the base 1, and the other is fixed to the carrier 2. The carrier 2 is used to mount a 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 sets of magnetic units 4 are also arranged along the first direction. Each magnetic unit 4 includes at least two opposite polarity directions, and at least two polarity directions intersect the first direction. The n coils 3 face the m sets of magnetic units 4 and are used to drive the carrier 2 to move relative to the base 1 along the first direction.

[0302] The distance A between the centerlines 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.

[0303] It is understandable that when coil 3 is energized, it can move along the first direction under the magnetic field of m sets of magnet units 4, thereby driving carrier 2 to move relative to base 1 along the first direction. By setting nA = jk, after n coils 3 are translated nA along the first direction, the magnetic field strength and direction of the n coils 3 at the positions before and after the translation nA can be the same. If the magnitude and direction of the current on the n coils 3 at the positions before and after the translation can be set to be the same, the magnitude and direction of the Ampere force 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 along the first direction, under the cooperation of the periodic alternating current and the magnetic field of m sets of magnet units 4, the n coils 3 can continuously move along the first direction, and carrier 2 can achieve long-stroke displacement relative to base 1 along the first direction.

[0304] n and m are integers greater than or equal to 2, where m is greater than n. m sets of magnetic units 4 are arranged along the first direction. The stroke of the motor 10 depends on the length of the m sets of magnetic units 4 along the first direction. By setting multiple sets of magnetic units 4, the carrier 2 can achieve a long stroke along the first direction. Furthermore, multiple coils 3 are subjected to multiple Ampere forces in the magnetic field. Compared to a single coil, multiple coils 3 can move a prism or lens with a larger mass. Alternatively, increasing the number of coils 3 while keeping the load constant can increase the movement speed of the carrier 2, thereby facilitating rapid focusing of the camera module 100.

[0305] 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 direction parallel to the optical axis of the camera module 100 with the carrier 2.

[0306] In other embodiments, n coils 3 can also be fixed on the base 1, and m sets of magnet units 4 can also be fixed on the carrier 2.

[0307] It is understood that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other, and any combination of features in different embodiments is also within the protection scope of this application. That is to say, the multiple embodiments described above can also be arbitrarily combined according to actual needs.

[0308] It is understood that all the above figures are exemplary illustrations of this application and do not represent the actual size of the product. Furthermore, the dimensional proportions between the components in the figures are not intended to limit the actual product of this application.

[0309] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A motor (10), characterized in that, It includes a base (1), a carrier (2), n coils (3) and m sets of magnet units (4), the magnet units (4) are fixed to the base (1), the coils (3) are 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, and m is greater than n; n coils (3) are arranged along the first direction, m groups of magnet units (4) are arranged along the first direction, the magnet unit (4) includes at least two polarity directions with opposite directions, at least two polarity directions intersect with the first direction, and the n coils (3) face the m groups of magnet units (4) 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; The motor (10) also includes an electrical connector (5), 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). The K value of the electrical connector (5) is less than 10mN / mm. The electrical connector (5) includes an extension (53) for extending the length of the electrical connector (5). The carrier (2) includes a bearing surface (21), a bottom surface (22) and a back surface (25). The bearing surface (21) is disposed opposite to the bottom surface (22), and the back surface (25) is connected to the bottom surface (22). The bearing surface (21) is used to mount the first optical element (204). n coils (3) are fixed to the bottom surface (22) of the carrier (2), and the extension (53) and the back surface (25) of the carrier (2) are arranged opposite to each other.

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, characterized in that, The length of the magnet unit (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) includes 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) is opposite to that of the second magnet (42). The polarity directions of the first magnet (41) and the second magnet (42) both intersect 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. Alternatively, the magnet unit (4) includes 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 that 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 all 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 3, characterized in that, The n coils (3) include a first coil (31), the magnetic field direction of the first coil (31) at a first position is the same as the magnetic field direction of the first coil (31) at a second position, and the magnetic field strength of the first coil (31) at the first position is the same as the magnetic field strength 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 3, characterized in that, The n coils (3) include a first coil (31) whose current direction changes when the first coil (31) moves 0.5k along the first direction.

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

9. The motor (10) according to any one of claims 1 to 3, characterized in that, The n coils (3) 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 certain moment among the n coils (3). The second type of coil is the coil (3) other than the first type of coil among 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), wherein 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) when it is energized in the first direction to the displacement when it is de-energized is 2:1; And / or, the ratio of the displacement of the second coil (32) when energized in the first direction to the displacement 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 the displacement when de-energized is 2:

1.

11. The motor (10) according to claim 1, characterized in that, The electrical connector (5) includes a spiral structure or a zigzag structure.

12. The motor (10) according to claim 1 or 11, characterized in that, The electrical connector (5) includes a spring; Alternatively, the electrical connector (5) may include a linear suspension assembly, one end of which is fixed to the base (1) and the other end of which is fixed to the carrier (2) and electrically connected to the coil (3), the linear suspension assembly being elastic.

13. The motor (10) according to any one of claims 1 to 3, characterized in that, The carrier (2) includes a first side plate (26) and a 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 the surface of the first side plate (26) away from the second side plate (27), n coils (3) are fixed on the surface of the second side plate (27) away from the first side plate (26), and m sets of magnet units (4) are fixed on the base (1).

14. The motor (10) according to claim 13, characterized in that, The carrier (2) further includes a first protrusion (28) and a second protrusion (29), 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.

15. The motor (10) according to any one of claims 1 to 3, characterized in that, The motor (10) further includes a first guide rod (81) and a second guide rod (82). 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 located on both sides of the coil (3) and are spaced apart from the coil (3). 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.

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

17. The motor (10) according to claim 15, characterized in that, The bottom surface (22) of the carrier (2) is provided with a first groove (221) and a second groove (222). The first guide rod (81) is slidably connected to the first groove (221), and the second guide rod (82) is slidably connected to the second groove (222). The first groove (221) includes a "V" shaped structure (2211), and the second groove (222) includes a "U" shaped structure (2212).

18. The motor (10) according to claim 17, characterized in that, There are two "V" shaped structures (2211) and one "U" shaped structure (2212); The two "V" shaped structures (2211) and the "U" shaped structure (2212) are connected in sequence to form a triangle, and the projection of the center of the carrier (2) on the plane of the triangle coincides with the triangle.

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

20. The motor (10) according to any one of claims 1 to 3, characterized in that, The motor (10) also includes a tunnel magnetoresistive effect sensor (83) and a magnetic grating (84). The tunnel magnetoresistive effect sensor (83) is fixed to the carrier (2) and spaced apart from the coil (3). The magnetic grating (84) is fixed to the base (1) and spaced apart from the magnet unit (4). The tunnel magnetoresistive effect sensor (83) and the magnetic grating (84) are arranged opposite to each other.

21. The motor (10) according to any one of claims 1 to 3, characterized in that, The motor (10) also includes a metal magnetic plate (85), which is fixed to the carrier (2) or the base and is spaced apart from the coil (3). The magnetic plate (85) and the magnet unit (4) are arranged opposite to each other.

22. The motor (10) according to any one of claims 1 to 3, characterized in that, The motor (10) also includes a buffer (86), which is fixed on the base (1). The buffer (86) and the carrier (2) are arranged opposite to each other along the first direction. The buffer (86) is flexible.

23. A camera module (100), characterized in that, It includes a first optical element (204), a photosensitive element (302), and a motor (10) as claimed in any one of claims 1 to 22, 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 the carrier (2) of the motor (10).

24. The camera module (100) according to claim 23, characterized in that, The first optical element (204) is a prism, and the camera module (100) may also 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).

25. The camera module (100) according to claim 24, characterized in that, The camera module (100) may also include a third optical element (201) and a fourth optical element (202). 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. The third optical element (201) and the fourth optical element (202) are arranged at intervals along a first direction. The carrier (2) of the motor (10) drives the prism to move along a first direction. In the first position, the prism and the third optical element (201) are arranged opposite each other. In the second position, the prism and the fourth optical element (202) are arranged opposite each other.

26. An electronic device (1000), characterized in that, It includes a housing (200) and a camera module (100) as claimed in any one of claims 23 to 25, the camera module (100) being mounted on the housing (200).

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