Camera assembly and electronic equipment

Abstract

The invention provides a camera assembly and electronic equipment, the camera assembly comprises a magnetic guide shaft, a magnet yoke, a coil, a magnetic structure and a lens unit, the two ends of the magnet yoke are connected to the magnetic guide shaft, and a magnet is arranged on the side, facing the magnetic guide shaft, of the magnet yoke; the coil sleeves the magnetic guide shaft; the magnetic structure is arranged between the coil and the magnetic guide shaft; the lens unit is slidably connected to the magnetic guide shaft along the optical axis direction, and the lens unit is connected with the coil, so that the lens unit is driven by the coil to slide along the magnetic guide shaft. By arranging the magnetic structure, the design requirement of the magnetic guide shaft can be lowered, the diameter size of the magnetic guide shaft can be designed to be small, occupied space is reduced, and more magnetic flux can be absorbed through the magnetic structure arranged between the magnetic guide shaft and the coil.

Description

Camera components and electronic equipment Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a camera assembly and electronic equipment. Background Art

[0002] Electronic products such as mobile phones and tablets often have integrated camera units, and the voice coil motor (VCM) is one of the main components for adjusting the lens position in the camera unit. In recent years, with the increase in camera module functions and the improvement in performance, the weight and size of camera modules have increased. This requires higher power to drive the heavy lens and achieve high-speed focusing. However, the power of existing voice coil motors has almost reached its limit, and it is difficult to obtain higher power. If the power needs to be increased, it is generally necessary to consider increasing the size of the voice coil motor, which makes it difficult to use in the limited space of mobile phones and tablets.

[0003] Application Contents

[0004] The purpose of this application is to provide a camera assembly and electronic equipment to solve the problems of low power and large size of the above-mentioned existing voice coil motors.

[0005] A first aspect of the present application provides a camera assembly, comprising:

[0006] Magnetic guide shaft;

[0007] a magnetic yoke, wherein both ends of the magnetic yoke are connected to the magnetic guide shaft, and a magnet is provided on a side of the magnetic yoke facing the magnetic guide shaft;

[0008] a coil, wherein the coil is sleeved on the magnetic guide shaft;

[0009] a magnetic structure, the magnetic structure being disposed between the coil and the magnetic guide shaft;

[0010] The lens unit is slidably connected to the magnetic guide shaft along the optical axis, and the lens unit is connected to the coil so as to drive the lens unit to slide along the magnetic guide shaft through the coil.

[0011] By setting up this magnetic structure, the present application can reduce the design requirements of the magnetic guide shaft, enable the diameter size of the magnetic guide shaft to be designed to be smaller, and reduce the space occupied. By setting up the magnetic structure between the magnetic guide shaft and the coil, more magnetic flux can be absorbed.

[0012] In one possible design, the magnetic structure is a magnetic metal tube, which is sleeved over the magnetic guide shaft with a gap between the tube and the shaft. This allows the tube to absorb a significant amount of magnetic flux and generate a significant driving force on the lens unit, thereby driving the heavier lens unit to move.

[0013] In one possible design, the magnetic structure is a magnetic coating formed on the surface of the coil facing the magnetic guide shaft. This coating can be integrated with the coil, reducing space usage. It can also absorb more magnetic flux, thereby increasing the Lorentz force that generates driving force in the coil.

[0014] In one possible design, the lens unit includes a camera part and a movable part, and the camera part is connected to the movable part; the movable part includes a first limiting structure and a second limiting structure, and the first limiting structure and the second limiting structure are spaced apart along the optical axis direction, and the first limiting structure and the second limiting structure are both provided with holes, and the movable part is slidably connected to the magnetic guide shaft through the hole; one end of the coil abuts against the first limiting structure, and the other end of the coil abuts against the second limiting structure.

[0015] By providing the first and second limiting structures on the movable portion, the coil can be directly connected to the movable portion without the need for a separate structure for connecting the coil, thereby saving space and achieving miniaturization of the camera assembly. Furthermore, the movable portion can be moved relative to the magnetic guide shaft via the first and second limiting structures, eliminating the need for separate sliding components such as rails or slots, thereby simplifying the design, saving space, and achieving miniaturization.

[0016] In one possible design, one end of the magnetic structure abuts the first retaining structure, and the other end abuts the second retaining structure. By providing the first and second retaining structures on the movable portion, the movable portion, the coil, and the magnetic structure can be connected and fixed, resulting in a higher degree of structural integration and miniaturization of the camera assembly.

[0017] In one possible design, a recessed portion is provided on the side of the magnet facing the coil, the coil is provided in the recessed portion, and along the circumferential direction of the coil, the length of the arc of the coil blocked by the recessed portion is 1 / 2 to 3 / 4 of the circumference of the coil. In this way, more magnetic flux can be collected, which is beneficial to increase the driving force for driving the lens unit to move. In addition, 1 / 2 to 3 / 4 of the circumference of the coil can be accommodated in the recessed portion. On the one hand, it can prevent the magnetic yoke from interfering with the movable part during installation. On the other hand, when the magnetic yoke does not interfere with the movable part, the coil has a larger area to be accommodated in the accommodating cavity, so as to collect more magnetic flux and obtain a greater driving force.

[0018] In one possible design, there are three magnets, one magnet is arranged on the side of the coil away from the lens unit along the first direction, and the other two magnets are arranged on both sides of the coil along the second direction, respectively. The first direction, the second direction and the optical axis direction are perpendicular to each other.

[0019] Among them, the three magnets can enclose a receiving space so that at least part of the coil can be accommodated in the receiving space. The three magnets can be located in three different orientations respectively. The magnetic flux of the three magnets flows toward the magnetic guide axis, which can enable the magnetic structure to collect more magnetic flux, which is beneficial to improving the driving force.

[0020] In one possible design, the surface of the magnet facing the coil is flat. Magnetic flux can flow perpendicularly to the surface toward the magnetic guide shaft, and the magnetic structure between the magnetic guide shaft and the coil can collect the magnetic flux to increase driving force.

[0021] In one possible design, the magnetic yoke includes a first side plate, a second side plate, a third side plate and a top plate, the first side plate is connected to one end of the second side plate, the third side plate is connected to an end of the second side plate away from the first side plate, and the first side plate and the third side plate are both connected to the magnetic guide shaft; the top plate is connected to the top of the second side plate, and the top plate, the first side plate, the second side plate and the third side plate enclose a receiving space, and the magnet, the coil and the magnetic guide shaft are arranged in the receiving space.

[0022] The magnetic yoke can effectively prevent the leakage of magnetic flux through the first side plate, the second side plate, the third side plate and the top plate, so that more magnetic flux can be collected by the magnetic structure, thereby improving the driving force.

[0023] In one possible design, the distance between the second side plate and the third side plate is greater than the length of the coil along the optical axis. This allows the yoke to prevent magnetic flux leakage throughout the entire process of driving the lens unit to move, ensuring a strong driving force during the entire process of driving the lens unit to move.

[0024] In one possible design, the top plate is provided with a flange that protrudes from the surface of the top plate in a direction away from the accommodation space. This flange can thus restrict downward movement of the lens unit in the second direction, ensuring stable movement of the lens unit along the optical axis. Furthermore, the flange can extend the magnetic flux leakage path, thereby reducing magnetic flux leakage.

[0025] In one possible design, the diameter of the magnetic guide shaft is 0.5mm to 2mm. Within this numerical range, space usage can be reduced, structural integration can be improved, and the coil, magnet, and yoke can be integrated on one or both sides of the lens unit, which is conducive to the miniaturization of the camera module. In addition, sufficient clearance can be provided between the magnetic guide shaft and the coil, allowing the arrangement of a magnetic structure between the magnetic guide shaft and the coil to collect more magnetic flux and obtain greater driving force.

[0026] In a possible design, the lens unit includes a position sensor, which can be used to detect the position of the lens unit moving along the optical axis, thereby ensuring the position accuracy of the lens unit movement.

[0027] In a possible design, two of each of the magnetic guide shaft, the magnetic yoke, the coil, and the magnetic structure are provided, and the two magnetic guide shafts, the two magnetic yokes, the two coils, and the two magnetic structures are respectively provided on opposite sides of the lens unit.

[0028] The magnetic guide shaft, yoke, coil, and magnetic structure on one side of the lens unit together form one drive assembly, while the magnetic guide shaft, yoke, coil, and magnetic structure on the other side of the lens unit together form another drive assembly. The two drive assembly groups are symmetrically arranged and can jointly provide driving force to drive the lens unit. Therefore, in this embodiment, by symmetrically arranging the two drive assembly groups, a driving force 1.5 to 2 times that of existing voice coil motors can be achieved, capable of driving heavier camera assemblies while still maintaining a compact size.

[0029] The second aspect of the present application also provides an electronic device, which includes the camera assembly provided by the first aspect of the present application.

[0030] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic structural diagram of a camera assembly provided in an embodiment of the present application;

[0032] FIG2 is an exploded view of a camera assembly provided in an embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram of the movable part;

[0034] FIG4 is a partial view of a camera assembly provided in an embodiment of the present application;

[0035] FIG5 is a schematic diagram showing a magnetic structure disposed inside a coil;

[0036] FIG6 is a state diagram of a magnet in application provided by an embodiment;

[0037] FIG7 is a schematic structural diagram of a magnet provided by an embodiment;

[0038] FIG8 is a state diagram of a magnet in application provided by another embodiment;

[0039] FIG9 is a schematic structural diagram of a magnetic yoke.

[0040] Reference numerals:

[0041] 1- Lens unit;

[0042] 11-Activities Department;

[0043] 111-first limiting structure;

[0044] 112- second limiting structure;

[0045] 12-Camera Department;

[0046] 13- Position sensor;

[0047] 2-Magnetic guide shaft;

[0048] 3- yoke;

[0049] 31- first side panel;

[0050] 32- second side panel;

[0051] 33- third side panel;

[0052] 34-top plate;

[0053] 35-Flanging;

[0054] 4-coil;

[0055] 5-Magnet;

[0056] 51-depression;

[0057] 6-Magnetic structure.

[0058] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0060] In the description of this application, unless otherwise specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0061] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also indirectly connected to the other element "on" or "under" through an intermediate element.

[0062] Electronic products such as mobile phones and tablet computers are usually integrated with a camera unit, which includes a lens. By adjusting the position of the lens, operations such as focusing can be achieved. In terms of lens adjustment, a voice coil motor (VCM) is generally used to achieve adjustment.

[0063] However, in recent years, camera module functionality and performance have been rapidly expanding and improving, driven by factors such as an increase in the number of lenses and high-speed focusing. This has placed new demands on the driving power of voice coil motors. For example, the motors need to be able to drive the increasing number of heavier lenses and also to quickly move the lenses to achieve high-speed focusing. However, the power of existing voice coil motors has almost reached its limit, making it difficult to achieve higher power and greater driving force. Increasing power generally requires increasing the size of the voice coil motor, which makes it difficult to use within the limited space of mobile phones and tablets.

[0064] As shown in FIG1 , an embodiment of the present application provides a camera assembly and an electronic device, wherein the camera assembly is disposed within the electronic device to provide a camera function. The electronic device may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, an in-vehicle device, a smart home device, and / or a smart city device. The embodiment of the present application does not impose any particular restrictions on the specific type of the electronic device.

[0065] Specifically, as shown in Figures 1 to 6, the camera assembly includes a magnetic guide shaft 2, a magnetic yoke 3, a coil 4, a magnetic structure 6, and a lens unit 1. The magnetic guide shaft 2 is made of a magnetic material. For example, the magnetic material can be a material with a high saturation magnetic flux density, such as S45K. If the precision and hardness of the magnetic guide shaft 2 are not sufficient, materials such as SS430 can also be used.

[0066] Coil 4 is sleeved around magnetic guide shaft 2 and generates a magnetic field when energized. A yoke 3 is connected to magnetic guide shaft 2 at both ends, and a magnet 5 is positioned on the side of yoke 3 facing magnetic guide shaft 2. Yoke 3 can be made of soft iron, A3 steel, or a soft magnetic alloy with relatively high magnetic permeability. The magnetic guide shaft 2 also functions as a yoke 3, forming a closed magnetic circuit between the two shafts.

[0067] The lens unit 1 is slidably connected to the magnetic guide shaft 2 along the optical axis direction Y. The lens unit 1 is also connected to the coil 4, so that the coil 4 drives the lens unit 1 to slide along the magnetic guide shaft 2. The optical axis direction Y is consistent with the axial direction of the magnetic guide shaft 2. When the coil 4 is energized, the magnetic force generated causes the coil 4 to move along the axial direction of the magnetic guide shaft 2, thereby driving the lens unit 1 to move synchronously, thereby achieving functions such as focusing of the lens unit 1.

[0068] The magnetic structure 6 is disposed between the coil 4 and the magnetic guide shaft 2. The coil 4 is sheathed around the magnetic guide shaft 2, leaving a gap between them. The magnetic structure 6 can be positioned within this gap, and a gap is maintained between the magnetic structure 6 and the magnetic guide shaft 2, preventing them from contacting each other. The magnetic structure 6 can absorb magnetic flux between the coil 4 and the magnetic guide shaft 2. This means that even if the diameter of the magnetic guide shaft 2 is small, the magnetic structure 6 can still absorb more magnetic flux, generating a greater driving force.

[0069] Therefore, by setting the magnetic structure 6, the design requirements of the magnetic guide shaft 2 can be reduced, the diameter size of the magnetic guide shaft 2 can be designed to be smaller, and the space occupied can be reduced. By setting the magnetic structure 6 between the magnetic guide shaft 2 and the coil 4, more magnetic flux can be absorbed. At the same time, by adjusting the thickness size of the magnetic structure 6 in the radial direction of the magnetic guide shaft 2, the magnetic field tension exerted on the magnetic structure 6 can be adjusted. Under appropriate conditions, this tension can ensure the stability of the magnetic structure 6 and the stability of the movement of the lens unit 1.

[0070] The material of the magnetic structure 6 may be the same as that of the magnetic guide shaft 2 , which is not limited in this embodiment.

[0071] Specifically, in one embodiment, the magnetic structure 6 is a magnetic metal tube that is sleeved on the magnetic guide shaft 2 with a gap between the magnetic metal tube and the magnetic guide shaft 2. The magnetic metal tube is a cylindrical tubular structure that can be sleeved on the outside of the magnetic guide shaft 2 without contacting the magnetic guide shaft 2. The axial length of the magnetic metal tube can be consistent with the axial length of the coil 4, thereby achieving a large degree of magnetic flux absorption and generating a large driving force on the lens unit 1, thereby driving the lens unit 1 to move after its weight increases.

[0072] In another embodiment, the magnetic structure 6 is a magnetic coating, which is formed on the surface of the coil 4 facing the magnetic guide shaft 2. In this embodiment, the magnetic coating can be formed on the surface of the coil 4 facing the magnetic guide shaft 2 by a process such as electroplating. The magnetic coating can form an integrated structure with the coil 4 to reduce space occupation. The magnetic coating can also absorb more magnetic flux, thereby increasing the Lorentz force that generates driving force in the coil 4.

[0073] Specifically, as shown in FIG1 , lens unit 1 includes an imaging portion 12 and a movable portion 11. Imaging portion 12 is connected to movable portion 11. Movable portion 11 includes a first retaining structure 111 and a second retaining structure 112. These first retaining structures 111 and second retaining structures 112 are spaced apart along optical axis direction Y. Both first retaining structure 111 and second retaining structure 112 are provided with holes, through which movable portion 11 is slidably connected to magnetic guide shaft 2. One end of coil 4 abuts first retaining structure 111, while the other end abuts second retaining structure 112.

[0074] As shown in Figures 2 and 3, the camera part 12 may include components such as a lens module and a circuit board. The movable part 11 may serve as the external frame structure of the camera part 12, used to carry the camera part 12, and can drive the camera part 12 to move as a whole. The first limiting structure 111 and the second limiting structure 112 are located on the same side of the movable part 11. The two ends of the coil 4 can be respectively abutted or fixedly connected to the first limiting part and the second limiting part, so that when the coil 4 moves relative to the magnetic guide shaft 2, it can drive the movable part 11 to move synchronously, thereby driving the lens unit 1 to move as a whole. By providing the first limiting structure 111 and the second limiting structure 112 on the movable part 11, the coil 4 can be directly connected to the movable part 11 without the need to separately design a structure for connecting the coil 4, thereby saving space and realizing the miniaturization of the camera assembly. The movable part 11 can also achieve relative movement with the magnetic guide shaft 2 through the first limiting structure 111 and the second limiting structure 112, so there is no need to design independent sliding components, such as slide rails, slide grooves, etc., which can also simplify the design, save space and achieve miniaturization.

[0075] Specifically, one end of the magnetic structure 6 abuts against the first limiting structure 111 , and the other end of the magnetic structure 6 abuts against the second limiting structure 112 .

[0076] The axial length of the magnetic structure 6 can be consistent with the axial length of the coil 4, so that the two ends of the magnetic structure 6 can also abut or be fixedly connected to the first limiting structure 111 and the second limiting structure 112, respectively, so that the magnetic structure 6, the coil 4, and the lens unit 1 can move synchronously. In other words, by providing the first limiting structure 111 and the second limiting structure 112 on the movable portion 11, the movable portion 11, the coil 4, and the magnetic structure 6 can be connected and fixed, thereby achieving a high degree of structural integration of the camera assembly and realizing a miniaturized camera assembly.

[0077] Specifically, as shown in Figure 7, a recessed portion 51 is provided on the side of the magnet 5 facing the coil 4, and the coil 4 is arranged in the recessed portion 51. Along the circumferential direction of the coil 4, the length of the arc of the coil 4 blocked by the recessed portion 51 is 1 / 2 to 3 / 4 of the circumference of the coil 4.

[0078] The side of the magnet 5 facing away from the recessed portion 51 can be fixed to the yoke 3, and the side of the magnet 5 facing away from the yoke 3 forms the recessed portion 51, so that a certain accommodation space is formed inside the recessed portion 51. At least a portion of the coil 4 can be disposed in this accommodation space. The distance between the portion of the coil 4 accommodated in the accommodation space and the magnet 5 is small, which can collect more magnetic flux and help increase the driving force used to drive the lens unit 1 to move. Specifically, 1 / 2 to 3 / 4 of the circumference of the coil 4 can be accommodated in the accommodation cavity. On the one hand, this can prevent the yoke 3 from interfering with the movable portion 11 during installation. On the other hand, it can provide a larger area for the coil 4 to be accommodated in the accommodation cavity without interfering with the movable portion 11, thereby collecting more magnetic flux and obtaining a greater driving force.

[0079] In one embodiment, as shown in FIG7 , the inner wall surface of the recessed portion 51 can be an arcuate surface, for example, the cross-sectional shape of the recessed portion 51 is a semicircular surface. When the coil 4 is accommodated in the recessed portion 51, the portion of the coil 4 close to the inner wall of the recessed portion 51 can collect magnetic flux. In addition, the inner wall surface of the recessed portion 51 can be a plane, and the portion of the coil 4 close to the plane of the recessed portion 51 can collect magnetic flux. In this embodiment, the magnet 5 can be an integral structure, that is, the magnet 5 is an independent part, and the recessed portion 51 can be directly formed on the magnet 5.

[0080] In another embodiment, as shown in FIG8 , three magnets 5 are provided, one magnet 5 is provided on a side of the coil 4 away from the lens unit 1 along the first direction X, and the other two magnets 5 are provided on both sides of the coil 4 along the second direction Z, respectively. The first direction X, the second direction Z and the optical axis direction Y are perpendicular to each other.

[0081] The three magnets 5 can enclose a storage space, so that at least a portion of the coil 4 can be accommodated in the storage space. The three magnets 5 can be located in three different orientations. For example, from one perspective, the three magnets 5 can be located above, below, and to the right of the coil 4, respectively. Of course, the specific orientation names may be different from different perspectives. By arranging the magnets 5 in three corresponding orientations, the magnetic flux of the three magnets 5 flows toward the magnetic guide shaft 2, allowing the magnetic structure 6 to collect more magnetic flux, which is beneficial for improving the driving force.

[0082] Specifically, as shown in Figure 8 , the surface of the magnet 5 facing the coil 4 is flat. Magnetic flux can flow toward the magnetic guide shaft 2 in a direction perpendicular to this surface, and the magnetic structure 6 located between the magnetic guide shaft 2 and the coil 4 can collect the magnetic flux to increase the driving force.

[0083] Specifically, as shown in Figure 9, the magnetic yoke 3 includes a first side plate 31, a second side plate 32, a third side plate 33, and a top plate 34. The first side plate 31 is connected to one end of the second side plate 32, and the third side plate 33 is connected to an end of the second side plate 32 away from the first side plate 31. The first side plate 31 and the third side plate 33 are both connected to the magnetic guide shaft 2. The top plate 34 is connected to the top of the second side plate 32. The top plate 34, the first side plate 31, the second side plate 32, and the third side plate 33 enclose a storage space, and the magnet 5, the coil 4, and the magnetic guide shaft 2 are disposed in the storage space.

[0084] Among them, the first side plate 31 can block the magnet 5, coil 4, and magnetic guide shaft 2 on one side along the first direction X to reduce the leakage of magnetic flux to the outside along the first direction X; the second side plate 32 and the third side plate 33 can respectively block the magnet 5, coil 4, and magnetic guide shaft 2 at both ends along the optical axis direction Y to reduce the leakage of magnetic flux to the outside along the optical axis direction Y; the top plate 34 blocks the magnet 5, coil 4, and magnetic guide shaft 2 on one side along the second direction Z to reduce the leakage of magnetic flux to the outside along the second direction Z. Thus, the magnetic yoke 3 can effectively prevent the leakage of magnetic flux through the first side plate 31, the second side plate 32, the third side plate 33, and the top plate 34, so that more magnetic flux can be collected by the magnetic structure 6, thereby improving the driving force.

[0085] Specifically, the distance between the second side plate 32 and the third side plate 33 is greater than the length of the coil 4 along the optical axis direction Y. When the coil 4 drives the lens unit 1 to move synchronously, the coil 4 can always move between the second side plate 32 and the third side plate 33 of the magnetic yoke 3. Therefore, the magnetic yoke 3 can prevent magnetic flux leakage throughout the entire process of driving the lens unit 1 to move. In other words, a large driving force can be ensured when driving the lens unit 1 to move.

[0086] Specifically, the top plate 34 is provided with a flange 35 , and the flange 35 protrudes from the surface of the top plate 34 in a direction away from the accommodation space.

[0087] After the camera assembly is assembled, a portion of the lens unit 1 can be located on a side of the flange 35 away from the top plate 34 along the second direction Z. Thus, the flange 35 can limit downward movement of the lens unit 1 along the second direction Z, thereby ensuring that the lens unit 1 can move stably along the optical axis direction Y. Furthermore, the flange 35 can also extend the leakage path of magnetic flux, thereby helping to reduce magnetic flux leakage.

[0088] Specifically, the diameter of the magnetic guide shaft 2 can be 0.5mm to 2mm. Within this numerical range, the space occupied can be reduced and the integration of the structure can be improved. The coil 4, magnet 5, and yoke 3 can be integrated on one side or both sides of the lens unit 1, which is conducive to the miniaturization of the camera module. In addition, there can be a sufficient gap between the magnetic guide shaft 2 and the coil 4, and a magnetic structure 6 can be arranged between the magnetic guide shaft 2 and the coil 4 to collect more magnetic flux to obtain greater driving force.

[0089] If the diameter of the magnetic guide shaft 2 is too small, for example, less than 0.5 mm, the magnetic guide shaft 2 will not have sufficient strength to support the lens unit 1. If the diameter of the magnetic guide shaft 2 is too large, for example, greater than 2 mm, the magnetic guide shaft 2 will occupy a large space, resulting in insufficient space between the magnetic guide shaft 2 and the coil 4 for arranging the magnetic structure 6. This will also result in a larger camera assembly, which is not conducive to miniaturization design.

[0090] In this embodiment, the diameter of the magnetic guide shaft 2 can be specifically 0.5 mm, 1 mm, 1.5 mm, or 2 mm.

[0091] Specifically, the lens unit 1 includes a position sensor 13 , which can be used to detect the position of the lens unit 1 moving along the optical axis, thereby ensuring the position accuracy of the lens unit 1 moving.

[0092] Specifically, as shown in FIG1 , two magnetic guide shafts 2 , two magnetic yokes 3 , two coils 4 and two magnetic structures 6 are each provided, and the two magnetic guide shafts 2 , two magnetic yokes 3 , two coils 4 and two magnetic structures 6 are respectively provided on opposite sides of the lens unit 1 .

[0093] The magnetic guide shaft 2, magnetic yoke 3, coil 4, and magnetic structure 6 on one side of the lens unit 1 together constitute one drive assembly. The magnetic guide shaft 2, magnetic yoke 3, coil 4, and magnetic structure 6 on the other side of the lens unit 1 together constitute another drive assembly. The two drive assembly groups are symmetrically arranged and can jointly provide driving force to drive the lens unit 1. Therefore, in this embodiment, by symmetrically arranging the two drive assembly groups, a driving force 1.5 to 2 times that of existing voice coil motors can be achieved, capable of driving heavier camera assemblies while still maintaining the camera assembly's miniaturization.

[0094] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A camera assembly, characterized in that: include: Magnetic guide shaft; a magnetic yoke, wherein both ends of the magnetic yoke are connected to the magnetic guide shaft, and a magnet is provided on a side of the magnetic yoke facing the magnetic guide shaft; a coil, wherein the coil is sleeved on the magnetic guide shaft; a magnetic structure, the magnetic structure being disposed between the coil and the magnetic guide shaft; The lens unit is slidably connected to the magnetic guide shaft along the optical axis, and the lens unit is connected to the coil so as to drive the lens unit to slide along the magnetic guide shaft through the coil.

2. The camera assembly according to claim 1, wherein: The magnetic structure is a magnetic metal tube, which is sleeved on the magnetic guide shaft, and a gap is formed between the magnetic metal tube and the magnetic guide shaft.

3. The camera assembly according to claim 1, wherein: The magnetic structure is a magnetic coating, and the magnetic coating is formed on a surface of the coil facing the magnetic guide shaft.

4. The camera assembly according to any one of claims 1 to 3, characterized in that: The lens unit includes an imaging portion and a movable portion, wherein the imaging portion is connected to the movable portion; The movable portion includes a first limiting structure and a second limiting structure, the first limiting structure and the second limiting structure are spaced apart along the optical axis, and the first limiting structure and the second limiting structure are both provided with a hole, and the movable portion is slidably connected to the magnetic guide shaft through the hole; One end of the coil abuts against the first limiting structure, and the other end of the coil abuts against the second limiting structure.

5. The camera assembly according to claim 4, wherein: One end of the magnetic structure abuts against the first limiting structure, and the other end of the magnetic structure abuts against the second limiting structure.

6. The camera assembly according to any one of claims 1 to 5, characterized in that: A recessed portion is provided on the magnet on one side facing the coil, the coil is arranged in the recessed portion, and along the circumferential direction of the coil, the arc length of the coil blocked by the recessed portion is 1 / 2 to 3 / 4 of the circumference of the coil.

7. The camera assembly according to any one of claims 1 to 5, characterized in that: There are three magnets, one magnet is arranged on the side of the coil away from the lens unit along the first direction, and the other two magnets are arranged on both sides of the coil along the second direction. The first direction, the second direction and the optical axis direction are perpendicular to each other.

8. The camera assembly according to claim 7, wherein: A surface of the magnet facing the coil is a plane.

9. The camera assembly according to any one of claims 1 to 8, wherein: The magnetic yoke includes a first side plate, a second side plate, a third side plate and a top plate, wherein the first side plate is connected to one end of the second side plate, the third side plate is connected to an end of the second side plate away from the first side plate, and the first side plate and the third side plate are both connected to the magnetic guide shaft; The top plate is connected to the top of the second side plate. The top plate, the first side plate, the second side plate and the third side plate form a receiving space. The magnet, the coil and the magnetic guide shaft are arranged in the receiving space.

10. The camera assembly according to claim 9, wherein: A distance between the second side plate and the third side plate is greater than a length of the coil along the optical axis.

11. The camera assembly according to claim 9, wherein: The top plate is provided with a flange, and the flange protrudes from the surface of the top plate in a direction away from the accommodating space.

12. The camera assembly according to any one of claims 1 to 12, characterized in that: The diameter of the magnetic guide shaft is 0.5 mm to 2 mm.

13. The camera assembly according to any one of claims 1 to 12, characterized in that: The lens unit includes a position sensor.

14. The camera assembly according to any one of claims 1 to 12, wherein: The magnetic guide shaft, the magnetic yoke, the coil and the magnetic structure are each provided with two, and the two magnetic guide shafts, the two magnetic yokes, the two coils and the two magnetic structures are respectively provided on two opposite sides of the lens unit.

15. An electronic device, characterized in that: A camera assembly comprising any one of claims 1-14.

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