Lens modules and electronic devices

Abstract

This application discloses a lens module and an electronic device. The lens module includes: a housing with a light-transmitting hole; a lens assembly disposed within the housing, the lens assembly including a prism and a first lens, light passing sequentially through the light-transmitting hole to the prism and the first lens, the first lens being movably connected to the housing along a first direction; and a first driving member located on one side of the first lens along a second direction, the first driving member including a first coil and a first driving magnet spaced apart and oppositely arranged along the second direction, one of the first coil and the first driving magnet being disposed in the housing and the other in the first lens, wherein the first driving magnet includes a plurality of first magnetic poles and a plurality of second magnetic poles, the plurality of first magnetic poles and the plurality of second magnetic poles being alternately arranged along the first direction, the first magnetic poles and the second magnetic poles having opposite magnetic properties, and when the first coil is energized, the first coil and the first driving magnet drive the first lens to move along the first direction to make the lens module focus.

Description

Technical Field

[0001] This application belongs to the field of electronic device technology, specifically relating to a lens module and an electronic device. Background Technology

[0002] Currently, people have increasingly higher demands for the shooting capabilities of electronic devices. However, traditional cameras, due to limitations in size and structure, cannot meet users' needs for telephoto and high-definition photography, while periscope cameras can achieve telephoto shooting without increasing the thickness of the device.

[0003] In related technologies, periscope cameras often suffer from excessive magnetic leakage due to the surge in focusing travel requirements and the large size of the focusing and image stabilization drive devices. This, in turn, affects the tight stacking of multiple cameras and reduces the space utilization of electronic devices. Summary of the Invention

[0004] This application aims to provide a lens module and electronic device that at least solves the problem of excessive magnetic leakage in electronic devices.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application propose a lens module, comprising: a housing having a light-transmitting hole; a lens assembly disposed within the housing, the lens assembly including a prism and a first lens, light passing sequentially through the light-transmitting hole to the prism and the first lens, the first lens being movably connected to the housing along a first direction; and a first driving member located on one side of the first lens along a second direction, the first driving member including a first coil and a first driving magnet spaced apart and arranged opposite to each other along the second direction, one of the first coil and the first driving magnet being disposed in the housing and the other in the first lens, wherein the first driving magnet includes a plurality of first magnetic poles and a plurality of second magnetic poles, the plurality of first magnetic poles and the plurality of second magnetic poles being alternately arranged along the first direction, the first magnetic poles and the second magnetic poles having opposite magnetic properties, and when the first coil is energized, the first coil and the first driving magnet drive the first lens to move along the first direction to focus the lens module.

[0007] Secondly, embodiments of this application provide an electronic device, including: a housing; and a lens module as described in any of the first aspects.

[0008] In the embodiments of this application, the lens module includes a housing, a lens group, and a first driving component. The lens group includes a prism and a first lens. Light enters the prism through a light-transmitting hole and then enters the first lens, achieving telephoto shooting without increasing the overall thickness of the camera module. The first driving component includes a first coil and a first driving magnet. One of the first coil and the first driving magnet is disposed on the housing, and the other is disposed on the first lens. When the first coil is energized, under the influence of the magnetic fields of the first coil and the first driving magnet, the first lens moves closer to or away from the prism along a second direction, thereby realizing the focusing function of the lens module and improving the shooting quality. The first driving magnet includes multiple first magnetic poles and multiple second magnetic poles. The first magnetic poles and the second magnetic poles have opposite magnetic properties, and the multiple first magnetic poles and the multiple second magnetic poles are alternately arranged along a first direction, that is, the first driving magnet is set as a multi-pole structure, which can significantly reduce the external magnetic leakage of the camera module, thereby facilitating the compact stacking of multiple cameras, effectively improving space utilization, and realizing the miniaturization design of electronic devices.

[0009] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0010] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0011] Figure 1 This is a schematic diagram of the shell structure according to an embodiment of this application;

[0012] Figure 2 This is one of the structural schematic diagrams of a lens module according to an embodiment of this application;

[0013] Figure 3 This is a second schematic diagram of the lens module according to an embodiment of this application;

[0014] Figure 4 This is the third schematic diagram of the lens module according to an embodiment of this application;

[0015] Figure 5 This is the fourth schematic diagram of the lens module according to an embodiment of this application;

[0016] Figure 6 This is a schematic diagram of the structure of the first driving component according to an embodiment of this application;

[0017] Figure 7 This is a schematic diagram of the segmented switching operation of the first coil according to an embodiment of this application;

[0018] Figure 8This is a simulation diagram of the thrust of the first coil during the movement of the first magnet according to an embodiment of this application;

[0019] Figure 9 This is a simulation diagram of magnetic leakage of the lens module according to an embodiment of this application;

[0020] Figure 10 This is the fifth schematic diagram of the lens module according to an embodiment of this application;

[0021] Figure 11 This is the sixth schematic diagram of the lens module according to an embodiment of this application;

[0022] Figure 12 This is the seventh schematic diagram of the lens module according to an embodiment of this application;

[0023] Figure 13 This is the eighth schematic diagram of the lens module according to an embodiment of this application;

[0024] Figure 14 This is the ninth schematic diagram of the lens module according to an embodiment of this application;

[0025] Figure 15 This is one of the structural schematic diagrams of the elastic element according to an embodiment of this application;

[0026] Figure 16 This is a second schematic diagram of the structure of the elastic element according to an embodiment of this application;

[0027] Figure 17 This is the third structural schematic diagram of the elastic element according to an embodiment of this application;

[0028] Figure 18 This is the fourth structural schematic diagram of the elastic element according to an embodiment of this application;

[0029] Figure 19 This is the fifth structural schematic diagram of the elastic element according to an embodiment of this application;

[0030] Figure 20 This is the sixth structural schematic diagram of the elastic element according to an embodiment of this application.

[0031] Figure label:

[0032] 1. Housing, 10. Light-transmitting hole, 12. Clearance part, 14. Outer shell, 16. Base, 2. Lens group, 20. Prism, 202. Incident surface, 204. Reflecting surface, 206. Exit surface, 21. Second lens, 22. First lens, 23. Magnetic suction element, 24. First carrier, 25. Second carrier, 250. Mounting slot, 3. First driving element, 30. First coil, 32. First driving magnet, 320. First magnetic pole, 322. Second magnetic pole, 324. Sliding element, 3240. Guide rod, 40. First sensing magnet, 41. Magnetic sensor, 42. Second sensing magnet, 43. First sensing chip, 44. Third sensing magnet, 45. Second sensing chip, 5. Rotating bracket, 50. First rotating part, 502. First ball bearing, 52. Second rotating part, 520. Second ball bearing, 6. Second driving element, 60. Second driving magnet, 61. Second coil, 62. Third driving magnet, 63. Third coil, 7. Elastic element, 70. Support part, 72. Elastic bending part.

[0033] Figure 21 This is a simulation diagram of magnetic leakage in a lens module in related technologies.

[0034] Figure label:

[0035] 1' magnet, 2' coil. Detailed Implementation

[0036] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects.

[0038] In the description of this application, it should be understood that the terms "center", "top", "bottom", "inner", "outer", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 this application.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] The following is combined with Figures 1-20 This application describes a lens module and an electronic device according to embodiments thereof.

[0041] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a lens module according to some embodiments of this application includes: a housing 1 with a light-transmitting hole 10; a lens group 2 disposed within the housing 1, the lens group 2 including a prism 20 and a first lens 22, light passing sequentially through the light-transmitting hole 10 to the prism 20 and the first lens 22, the first lens 22 being movably connected to the housing 1 along a first direction; and a first driving member 3 located on one side of the first lens 22 along a second direction, the first driving member 3 including a first coil 30 and a first driving magnet 32 ​​spaced apart and arranged opposite to each other along the second direction, one of the first coil 30 and the first driving magnet 32 ​​being disposed in the housing 1 and the other in the first lens 22, wherein the first driving magnet 32 ​​includes a plurality of first magnetic poles 320 and a plurality of second magnetic poles 322, the plurality of first magnetic poles 320 and the plurality of second magnetic poles 322 being alternately arranged along the first direction, the first magnetic poles 320 and the second magnetic poles 322 having opposite magnetic properties, and when the first coil 30 is energized, the first coil 30 and the first driving magnet 32 ​​drive the first lens 22 to move along the first direction to make the lens module focus.

[0042] In the embodiments of this application, the lens module includes a housing 1, a lens group 2, and a first driving member 3. The lens group 2 includes a prism 20 and a first lens 22. Light enters the prism 20 through the light-transmitting hole 10 and then enters the first lens 22, achieving telephoto shooting without increasing the overall thickness of the camera module. The first driving member 3 includes a first coil 30 and a first driving magnet 32. One of the first coil 30 and the first driving magnet 32 ​​is disposed on the housing 1, and the other is disposed on the first lens 22. When the first coil 30 is energized, under the action of the magnetic field of the first coil 30 and the magnetic field of the first driving magnet 32, the first lens 22 moves closer to or away from the prism 20 in a second direction, thereby realizing the focusing function of the lens module and improving the shooting quality. For example, Figure 6 and Figure 9As shown, the first driving magnet 32 ​​includes multiple first magnetic poles 320 and multiple second magnetic poles 322. The first magnetic poles 320 and the second magnetic poles 322 have opposite magnetic properties, and the multiple first magnetic poles 320 and the multiple second magnetic poles 322 are alternately arranged along the first direction. That is, the first driving magnet 32 ​​is set as a multi-pole structure, which can significantly reduce the external magnetic leakage of the camera module, thereby facilitating the compact stacking of multiple cameras, effectively improving space utilization, and realizing the miniaturization design of electronic devices.

[0043] In practical applications, the plurality of first magnetic poles 320 and the plurality of second magnetic poles 322 of the first driving magnet 32 ​​can be arranged at intervals or arranged sequentially and closely together. Optionally, the first driving magnet 32 ​​includes multiple magnets, with magnets having the polarity of the first magnetic pole 320 and magnets having the polarity of the second magnetic pole 322 alternately arranged along a first direction, or the first driving magnet 32 ​​can be multi-pole magnetized so that the plurality of first magnetic poles 320 and the plurality of second magnetic poles 322 are alternately arranged along the first direction.

[0044] It is understandable that the first direction is the optical axis direction of the second lens 21 and the first lens 22.

[0045] Optionally, the first magnetic pole 320 is one of the N pole and the S pole, and the second magnetic pole 322 is the other of the N pole and the S pole.

[0046] Optionally, the first coil 30 is fixed to the housing 1, and the first driving magnet 32 ​​is fixed to the first lens 22 to facilitate the wiring of the first coil 30.

[0047] According to some embodiments of this application, optionally, the number of first coils 30 is at least two, and the at least two first coils 30 are spaced apart along a first direction. When the first coils 30 are energized, the at least two first coils 30 work alternately or simultaneously.

[0048] In this embodiment, there are at least two first coils 30, which are spaced apart along a first direction and alternately drive the first driving magnet 32 ​​to move when energized, so as to improve the thrust efficiency of the first coils 30, or at least two coils drive the first driving magnet 32 ​​to move simultaneously to achieve greater thrust.

[0049] like Figure 3 and Figure 4 As shown, according to some embodiments of this application, optionally, the first driving member 3 further includes: a sliding member 324, disposed in the housing 1, located on the side of the first lens 22 close to the first driving magnet 32 ​​along the second direction, and the first lens 22 and the sliding member 324 are slidably connected along the first direction.

[0050] In this embodiment, the first driving member 3 further includes a slider 324, which is disposed on the housing 1. The first lens 22 is connected to the slider 324, so that the first lens 22 can slide along the slider 324 under the drive of the first coil 30 and the first driving magnet 32. The slider 324 is disposed on the side of the first lens 22 close to the first driving magnet 32 ​​along the second direction. That is, the first coil 30, the first driving magnet 32, and the slider 324 are all disposed on the same side of the first lens 22, thereby reducing the space occupied on the other side of the first lens 22, realizing the miniaturization design of the camera module, and thus facilitating the stacking of multiple components around the lens module.

[0051] According to some embodiments of this application, optionally, the slider 324 includes at least two guide rods 3240, which are spaced apart along a third direction of the lens module.

[0052] In this embodiment, the slider 324 includes at least two guide rods 3240, which are spaced apart along the third direction of the lens module, thereby improving the support effect on the first lens 22 and reducing the space occupied on the other side of the first lens 22.

[0053] It is understandable that the length direction of the guide rod 3240 is set along the first direction.

[0054] In practical applications, the first direction, the second direction, and the third direction are perpendicular to each other.

[0055] like Figure 1 As shown, according to some embodiments of this application, optionally, a portion of the housing 1 is recessed inward to form a clearance portion 12, the clearance portion 12 being located on the other side of the first lens 22 along the second direction.

[0056] In this embodiment, since the first driving member 3 and the sliding member 324 are both located on the same side of the first lens 22 along the second direction, the space on the other side of the first lens 22 along the second direction can be saved, so that the housing 1 can be recessed at this location to form a clearance part 12. This allows other components to be placed in the space cleared by the clearance part 12, reducing the space occupied by the housing 1 and realizing the miniaturization design of the electronic device.

[0057] like Figure 3 and Figure 4As shown, according to some embodiments of this application, the lens assembly 2 may optionally include: a magnetic attractor 23 disposed on the housing 1 and located on one side of the first lens 22 along the second direction, wherein a first driving magnet 32 ​​is disposed on the first lens 22 and attracted to the magnetic attractor 23; and / or a first carrier 24, wherein the first lens 22 is disposed on the first carrier 24, and one of the first driving magnet 32 ​​and the first coil 30 is disposed on the first carrier 24.

[0058] In this embodiment, the lens assembly 2 further includes a magnetic suction member 23, which is disposed on the housing 1. When the first driving magnet 32 ​​is disposed on the first lens 22, the first driving magnet 32 ​​attracts the magnetic suction member 23, thereby reliably installing the first lens 22 onto the housing 1. Optionally, the lens assembly 2 further includes a first carrier 24, on which the first lens 22 is mounted, thus protecting the first lens 22. The first lens 22 can also be connected to other structural components through the first carrier 24, preventing damage such as friction to the first lens 22.

[0059] Optionally, the magnetic element 23 includes a steel sheet.

[0060] Optionally, a mounting carrier is also provided on the outer side of the second lens 21, and the second lens 21 is connected to other structural components through the mounting carrier.

[0061] According to some embodiments of this application, the lens group 2 may optionally include a second lens 21, the prism 20 includes an incident surface 202, a reflecting surface 204 and an exit surface 206, the incident surface 202 is disposed opposite to the light-transmitting aperture 10, the second lens 21 is disposed opposite to the exit surface 206, and the first lens 22 is disposed opposite to the second lens 21 and is located on the side of the second lens 21 away from the prism.

[0062] In this embodiment, the second lens 21 is positioned between the prism 20 and the first lens 22. Light enters the prism 20 through the light-transmitting hole 10, passes through the incident surface 202, the reflecting surface 204 and the exit surface 206 in sequence, enters the second lens 21, and then enters the first lens 22, thus achieving telephoto shooting.

[0063] like Figure 4 As shown, according to some embodiments of this application, optionally, the lens module further includes a magnetic sensor 41 and a plurality of first sensing magnets 40. The magnetic sensor 41 is disposed on the housing 1, the first sensing magnets 40 are disposed on the first lens 22, and the plurality of first sensing magnets 40 are arranged in an array along a first direction. The magnetic sensor 41 determines the position of the first lens 22 based on the magnetic field of the plurality of first sensing magnets 40.

[0064] In this embodiment, a plurality of first sensing magnets 40 are arranged in an array along a first direction. The periodically arrayed first sensing magnets 40 are paired with magnetic sensors 41 disposed on the housing 1, which can realize high-precision position sensing over long strokes.

[0065] Optionally, the magnetic sensor 41 includes an coded magnetic sensor.

[0066] Optionally, the N pole and S pole of the plurality of first sensing magnets 40 are alternately arranged in sequence along a first direction.

[0067] like Figure 10 and Figure 11 As shown, according to some embodiments of this application, optionally, the lens module further includes: a rotating bracket 5, disposed on the side of the prism 20 away from the light-transmitting hole 10 along a third direction; the rotating bracket 5 has a first rotating part 50 disposed on the side of the prism 20 along a third direction and a second rotating part 52 disposed on the other side; the prism 20 is connected to the rotating bracket 5 through the first rotating part 50; the rotating bracket 5 is connected to the housing 1 through the second rotating part 52, so that the prism 20 can rotate relative to the rotating bracket 5 about a second direction, and the prism 20 rotates about a third direction through the rotating bracket 5; a second driving member 6, a part of the second driving member 6 is disposed on the prism 20 and the other part is disposed on the housing 1, for driving the prism 20 to rotate about a second direction or about a third direction, so that the lens module is image-stabilized; wherein, the third direction coincides with the optical axis direction of the prism 20.

[0068] In this embodiment, the lens module further includes a rotating bracket 5 and a second driving member 6. The rotating bracket 5 is disposed on the side of the prism 20 away from the light-transmitting hole 10 along a third direction, which can avoid blocking the light from the prism 20. The rotating bracket 5 has a first rotating part 50 and a second rotating part 52 respectively disposed on both sides along the third direction. The prism 20 is connected to the rotating bracket 5 through the first rotating part 50, allowing the prism 20 to rotate relative to the rotating bracket 5 around a second direction under the action of the second driving member 6 (e.g., ...). Figure 12 (As indicated by the arrow), it achieves image stabilization around a second direction; the rotating bracket 5 is rotatably connected to the housing 1 via the second rotating part 52, so that the rotating bracket 5 and the prism 20 as a whole can rotate around a third direction under the drive of the second driving member 6, achieving image stabilization around a third direction. Simultaneously, the third direction coincides with the optical axis direction of the prism 20, that is, the rotating bracket 5 and the prism 20 as a whole can rotate around the optical axis under the drive of the second driving member 6 (as shown by the arrow). Figure 11 (As indicated by the arrow), this design ensures the reliability of light entering the prism 20, preventing the stabilization function from affecting the light entry. At the same time, this design allows the mechanical rotation center to coincide with the optical center, and also allows for the addition of other lenses on the side of the light-incident surface of the prism 20, further improving the performance of the camera module.

[0069] It is understandable that the prism 20 can rotate relative to the rotating bracket 5 in a second direction through the first rotating part 50. However, when the second driving member 6 drives the prism 20 to rotate in a third direction, the prism 20 and the rotating bracket 5 can be limited and engaged, so that the rotating bracket 5 and the prism 20 as a whole rotate around the second rotating part 52. This arrangement makes the prism 20 more reliable in a stable state or in a non-working state, and reduces the possibility of static shaking of the prism 20.

[0070] like Figure 10 and Figure 12 As shown, according to some embodiments of this application, optionally, the lens module further includes: a second carrier 25, a prism 20 disposed on the second carrier 25, a portion of the second driving member 6 disposed on the second carrier 25, and a mounting groove 250 provided on the second carrier 25; the first rotating part 50 includes at least two first balls 502, a portion of the first balls 502 being embedded in the mounting groove 250, and the at least two first balls 502 being spaced apart along a second direction so that the prism 20 rotates relative to the rotating bracket 5 about the second direction, and when the prism 20 rotates about a third direction, the rotating bracket 5 is limited to the second carrier 25 through the mounting groove 250 so that the rotating bracket 5 rotates with the prism 20 about the third direction.

[0071] In this embodiment, the lens module further includes a second carrier 25, on which the prism 20 is disposed, enabling connection between the prism 20 and other structures. The first rotating part 50 includes at least two first ball bearings 502, spaced apart along a second direction to form a rotating shaft along that direction. The second carrier 25 has a mounting groove 250, in which a portion of the first ball bearings 502 is embedded, allowing the second carrier 25 to drive the prism 20 to rotate around the second direction. Simultaneously, when the second driving member 6 drives the prism 20 to rotate around a third direction, the rotating bracket 5 engages with the second carrier 25 via the mounting groove 250, ensuring the reliability of the prism 20's rotation.

[0072] Optionally, the mounting groove 250 is provided on both sides of the second carrier 25 along the second direction.

[0073] like Figure 11As shown, according to some embodiments of this application, optionally, the lens module further includes: at least two elastic members 7, at least two elastic members 7 located on the side of the prism 20 away from the first lens 22 along the first direction, at least two elastic members 7 are spaced apart along the second direction, one end of any elastic member 7 is connected to the housing 1, and the other end is connected to the rotating bracket 5, the elastic member 7 can reset the prism 20; wherein, the second rotating part 52 includes a second ball 520, and the rotating bracket 5 is supported on the housing 1 by the second ball 520.

[0074] In this embodiment, the lens module further includes at least two elastic elements 7, disposed on the side of the prism 20 away from the first lens 22 along a first direction. The at least two elastic elements 7 are spaced apart along a second direction, with one end of each elastic element 7 connected to the housing 1 and the other end connected to the rotating bracket 5. Thus, the triangle formed by the second ball bearing 520 on the bottom surface of the rotating bracket 5 and the ends of the at least two elastic elements 7 connected to the housing 1 (fulcrums a and b) forms a rotation plane centered on the second ball bearing 520. This allows the rotating bracket 5, the second carrier 25 on the rotating bracket 5, and the prism 20 as a whole to rotate around the normal line passing through the second ball bearing 520 on the rotation plane, i.e., to rotate as a whole around a third direction. Simultaneously, the at least two elastic elements 7 provide support and rebound force, thereby ensuring the stability of the prism 20's rotation and the reliability of its reset.

[0075] like Figure 15 , Figure 16 , Figure 17 , Figure 18 , Figure 19 and Figure 20 As shown, according to some embodiments of this application, optionally, the elastic member 7 includes: a plurality of support portions 70, spaced apart along a third direction; an elastic bending portion 72, with adjacent support portions 70 connected by the elastic bending portion 72; one support portion 70 is supported on the housing 1, and one support portion 70 is connected to the second carrier 25 or the rotating bracket 5; or the housing 1, the second carrier 25 and the rotating bracket 5 are respectively connected to one support portion 70.

[0076] In this embodiment, the elastic element 7 includes a support portion 70 and an elastic bending portion 72. Two adjacent support portions 70 are connected by the elastic bending portion 72. One support portion 70 is supported on the housing 1, and the other support portion 70 is connected to the second carrier 25 or the rotating bracket 5. Alternatively, the housing 1, the second carrier 25, and the rotating bracket 5 are each connected to a support portion 70, so that one end of the elastic element 7 is supported on the housing 1 and can be connected to at least one of the second carrier 25 and the rotating bracket 5, thereby realizing the support and reset of the prism 20.

[0077] like Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, according to some embodiments of this application, optionally, the second driving member 6 includes: a second driving magnet 60 and a second coil 61, located on the side of the prism 20 away from the light-transmitting hole 10 along a third direction. The second driving magnet 60 is disposed in one of the housing 1 and the prism 20, and the second coil 61 is disposed in the other of the housing 1 and the prism 20. When the second coil 61 is energized, the second coil 61 and the second driving magnet 60 can drive the prism 20 to rotate around the second direction; a third driving magnet 62 and a third coil 63, located on the side of the prism 20 away from the first lens 22 along the second direction. The third driving magnet 62 is disposed in one of the housing 1 and the prism 20, and the third coil 63 is disposed in the other of the housing 1 and the prism 20. When the third coil 63 is energized, the third coil 63 and the third driving magnet 62 can drive the prism 20 to rotate around the third direction.

[0078] In this embodiment, the second driving member 6 includes a second driving magnet 60 and a second coil 61 that cooperate with each other, and a third driving magnet 62 and a third coil 63 that cooperate with each other. The second driving magnet 60 and the second coil 61 are located on the side of the prism 20 away from the light-transmitting hole 10 along a third direction. One of the second driving magnet 60 and the second coil 61 is connected to the prism 20, and the other is connected to the housing 1. When the second coil 61 is energized, the second coil 61 and the second driving magnet 60 drive the prism 20 to rotate around the second direction to achieve image stabilization of the lens module. The third driving magnet 62 and the third coil 63 are located on the side of the prism 20 away from the first lens 22 along the second direction. One of them is disposed on the housing 1, and the other is connected to the prism 20. When the third coil 63 is energized, the third coil 63 and the third driving magnet 62 drive the prism 20 to rotate around the third direction to achieve image stabilization of the prism 20 around the third direction.

[0079] Optionally, the number of third coils 63 is at least two, and the at least two third coils 63 are spaced apart along the second direction.

[0080] like Figure 13As shown, according to some embodiments of this application, optionally, the lens module further includes a second sensing magnet 42 and a first sensing chip 43, one of the second sensing magnet 42 and the first sensing chip 43 being disposed on the prism 20 and the other being disposed on the housing 1. The second sensing magnet 42 and the first sensing chip 43 are arranged opposite to each other along a third direction, and are used to detect the position information of the prism 20 when rotating along a second direction based on the magnetic field of the second driving magnet 60 and the second sensing magnet 42; and / or a third sensing magnet 44 and a second sensing chip 45, one of the third sensing magnet 44 and the second sensing chip 45 being disposed on the prism 20 and the other being disposed on the housing 1. The third sensing magnet 44 and the second sensing chip 45 are arranged opposite to each other along a second direction, and are used to detect the position information of the prism 20 when rotating along a third direction based on the magnetic field of the third sensing magnet 44 and the third driving magnet 62.

[0081] In this embodiment, the lens module further includes a second sensing magnet 42 and a first sensing chip 43 that cooperate with each other. One of the second sensing magnet 42 and the first sensing chip 43 is disposed on the prism 20, and the other is disposed on the housing 1. When the second driving magnet 60 and the second coil 61 drive the prism 20 to rotate around the second direction, the first sensing chip 43 detects the position of the prism 20 through the magnetic field of the second driving magnet 60 and the second sensing magnet 42, and then feeds it back to the processor to realize the detection and adjustment of the position of the prism 20. Optionally, the lens module further includes a third sensing magnet 44 and a second sensing chip 45 that cooperate with each other. When the third driving magnet 62 and the third coil 63 drive the prism 20 to rotate around the third direction, the second sensing chip 45 detects the position of the prism 20 according to the magnetic field of the third driving magnet 62 and the third sensing magnet 44, and then feeds it back to the processor to realize the detection and adjustment of the position of the prism 20.

[0082] Optionally, the housing 1 includes a base 16 and an outer shell 14, with the outer shell 14 covering the base 16, a light-transmitting hole 10 disposed on the outer shell 14, and a first coil 30, a second coil 61, a third coil 63, a second lens 21, a first lens 22, and a prism 20 disposed on the base 16.

[0083] This application provides an electronic device comprising: a housing; and a lens module as described in any of the preceding claims, thus possessing all the beneficial effects of a lens module, which will not be elaborated further here.

[0084] In practical applications, the lens module proposed in this application has at least the following beneficial effects:

[0085] 1. Focusing system

[0086] 1) Improve magnetic leakage interference of long-stroke autofocus (AF): The magnetic circuit layout of array magnets (e.g., the first driving magnet 32) + dual coils (e.g., the first coil 30) is adopted, which greatly reduces external magnetic leakage, facilitates the tight stacking of multiple cameras, and effectively improves space utilization.

[0087] 2) Compact structure: single-sided drive system + single-sided guide rod 3240 slide rail, asymmetrical design on both sides, and miniaturization design by inward shrinkage of the other side.

[0088] 3) Improve thrust efficiency: The dual-coil alternating drive system is adopted to improve thrust stability and coil working efficiency.

[0089] 4) Improve the accuracy of the feedback system: The periodic feedback system consisting of an array of magnets and a tunneling magnetoresistive (TMR) sensor is used to improve the accuracy of long-stroke position feedback.

[0090] 2. Image stabilization system

[0091] 1) Alignment of mechanical center with optical center: A double-layer nested ball bearing structure (e.g., rotating bracket 5) is adopted to achieve the coincidence of the rotation center with the optical axis center of prism 20.

[0092] 2) Centered hovering: The suspension uses a spring (e.g., elastic element 7) to achieve centered hovering in the natural position, which improves the appearance of the body in the natural state and helps to improve the start speed and response of the anti-shake control. At the same time, it helps to reduce impact and improve reliability.

[0093] The lens module proposed in this application includes a focusing structure and an image stabilization structure.

[0094] Figure 1 It is an overall appearance view, with one side partially recessed and made into an irregular shape to achieve miniaturization of the drive device.

[0095] The lens module includes an AF autofocus lens group functional area (hereinafter referred to as the AF functional area) and a prism 20 image stabilization functional area, both of which are placed on the same base 16. The AF autofocus lens group functional area may further include a movable lens group (e.g., the first lens 22) and a fixed lens group (e.g., the second lens 21).

[0096] The movable lens assembly is mounted and fixed on the lens assembly 2 carrier (e.g., the first carrier 24). The lens assembly 2 carrier is supported against the right side wall of the base 16 by the first guide rod and the second guide rod, and is pressed tightly against the base 16 by the attraction force between the first driving magnet 32 ​​fixed on the lens assembly 2 carrier and the magnetic steel sheet (e.g., magnetic attractor 23) fixed on the base 16. When the first coil 30 is energized, the lens assembly 2 carrier can move back and forth (e.g., along the first direction) along the guide rod 3240. A periodic array of sensing magnets (e.g., the first sensing magnet 40) is installed at the bottom of the lens assembly 2 carrier and paired with the coded magnetic sensor set on the base 16 to achieve high-precision position sensing over a long stroke.

[0097] Figure 6 The diagram provided illustrates the positions of two first coils 30 and a multi-pole magnet (an array of multiple first magnetic poles 320 and multiple second magnetic poles 322). The example uses a 4-pole magnet. The first coils 30 are fixed, while the magnets are movable in a direction parallel to the first coils 30.

[0098] Figure 7 This diagram illustrates the concept of the first coil's 30-segment switching operation. Figure 8 The diagram shows the thrust displacement of the two coils when the first coil 30 has a fixed current throughout its full stroke. Figure 7 and Figure 8 In this context, C1 represents one of the first coils 30, and C2 represents the other first coil 30. Figure 7 The "2" in the text indicates that both sides of the first coil 30 are in the effective magnetic field region. Figure 7 The "1" in the text indicates that one side of the first coil 30 is in the effective magnetic field region. Figure 7 The "0" in the figure indicates that both sides of the first coil 30 are in the non-magnetic region. The segmented switching of the first coil 30 achieves the highest thrust efficiency. Of course, for certain special application scenarios, both coils can work simultaneously to achieve a greater thrust effect.

[0099] Figure 9 A magnetic flux leakage simulation diagram of the lens module proposed in this application is shown. Figure 21 This diagram illustrates a simulation of magnetic leakage flux generated by magnet 1' and corresponding coil 2' in a lens module of a related technology, for comparison. Figure 9 and Figure 21 As can be seen, the magnetic leakage of the magnet array used in this application is smaller, which helps to reduce the stacking gap with surrounding magnetic devices.

[0100] Figure 10This is an exploded view of the Optical Image Stabilization (OIS) functional area. The OIS functional area enables the prism 20 to rotate in two directions: the pitch axis (e.g., the second direction) and the yaw axis (e.g., the third direction). The overall structure is a double-layer rotating structure. The rotation axis of the pitch axis is composed of two ball bearings (e.g., the first ball bearing 502), while the rotation center of the yaw axis is composed of one ball bearing (e.g., the second ball bearing 520), and the rotation plane is stabilized by a spring support. The driving force of the yaw axis is arranged on the back of the prism 20, and the driving force of the pitch axis is arranged on the bottom surface of the prism 20.

[0101] Figure 11 The rotating support 5 of the yaw axis will be described below. The ball bearings (e.g., the second ball bearing 520) on the bottom surface of the rotating support 5 and the triangle formed by the spring fulcrum points a and b constitute a plane of rotation centered on the ball bearings. The entire system can rotate around the normal to the fulcrum plane. The spring fulcrum points a and b provide support and rebound force.

[0102] Figure 12 The rotation suspension of the pitch axis will be described. The ball bearings on both sides of the rotating bracket 5 rest against the support of the prism 20 (e.g., the second carrier 25), and the two ball bearings form a rotation axis around which the support of the prism 20 can rotate.

[0103] Specifically, the driving magnet of the pitch axis (e.g., the second driving magnet 60) and the second coil 61 are arranged on the bottom surface of the prism 20. When the second coil 61 is energized, the prism 20 can rotate around the pitch axis. The yaw axis is composed of two third coils 63. When the third coil 63 is energized, it can drive the prism 20 to rotate around the yaw axis.

[0104] Optionally, the feedback structure (e.g., the second sensing magnet 42, the third sensing magnet 44, the first sensing chip 43 and the second sensing chip 45) is arranged on the back of the prism 20, and the sensing magnet and the driving magnet together provide the magnetic field for feedback.

[0105] Optionally, Figure 15 and Figure 16 The connection structure (e.g., support 70) of the elastic element 7 and Figure 17 and Figure 18 The connection structure of the elastic element 7 is the same, but it is made into different chord features (e.g., elastic bending part 72). Figure 19 and Figure 20 Only the connection points between the elastic element 7, the rotating bracket 5, and the base 16 are retained; the upper part has been cut off. The elastic element 7 can be made into different shapes to meet different structural and performance requirements; of course, it can also be made into many other structural features.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0107] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A lens module, characterized in that, include: The housing is equipped with a light-transmitting hole; A lens assembly is disposed within the housing. The lens assembly includes a prism and a first lens. Light passes sequentially through the prism and the first lens through the light-transmitting hole. The first lens is movably connected to the housing along a first direction. A first driving element is located on one side of the first lens along a second direction. The first driving element includes a first coil and a first driving magnet that are spaced apart and opposite to each other along the second direction. One of the first coil and the first driving magnet is disposed in the housing, and the other is disposed in the first lens. The first driving magnet includes a plurality of first magnetic poles and a plurality of second magnetic poles, which are alternately arranged along the first direction. The first magnetic poles and the second magnetic poles have opposite magnetic properties. When the first coil is energized, the first coil and the first driving magnet drive the first lens to move along the first direction so that the lens module can focus. A rotating bracket is provided on the side of the prism away from the light-transmitting hole along a third direction. The rotating bracket has a first rotating part on the side of the prism along the third direction and a second rotating part on the other side. The prism is connected to the rotating bracket through the first rotating part, and the rotating bracket is connected to the housing through the second rotating part, so that the prism can rotate relative to the rotating bracket around the second direction, and the prism can rotate around the third direction through the rotating bracket. The second driving member, a portion of which is disposed on the prism and the other portion of which is disposed on the housing, is used to drive the prism to rotate around the second direction or around the third direction, so as to stabilize the lens module; The third direction coincides with the optical axis direction of the prism.

2. The lens module according to claim 1, characterized in that, The number of the first coils is at least two, and the at least two first coils are spaced apart along the first direction. When the first coils are energized, the at least two first coils work alternately or simultaneously.

3. The lens module according to claim 1, characterized in that, The first driving component further includes: A slider is provided in the housing and located on the side of the first lens close to the first driving magnet along the second direction. The first lens and the slider are slidably connected along the first direction.

4. The lens module according to claim 3, characterized in that, The slider includes at least two guide rods, which are spaced apart along a third direction of the lens module.

5. The lens module according to claim 4, characterized in that, A portion of the housing is recessed inward to form a clearance portion, which is located on the other side of the first lens along the second direction.

6. The lens module according to claim 1, characterized in that, The lens assembly also includes: A magnetic attractor is disposed on the housing, located on one side of the first lens along the second direction, wherein the first driving magnet is disposed on the first lens and attracts the magnetic attractor; and / or A first carrier, the first lens disposed on the first carrier, and one of the first driving magnet and the first coil disposed on the first carrier; and / or The second lens, wherein the prism includes an incident surface, a reflecting surface, and an exit surface, the incident surface is disposed opposite to the light-transmitting aperture, the second lens is disposed opposite to the exit surface, and the first lens is disposed opposite to the second lens, located on the side of the second lens away from the prism; and / or The lens module also includes a magnetic sensor and a plurality of first sensing magnets. The magnetic sensor is disposed in the housing, and the first sensing magnets are disposed in the first lens. The plurality of first sensing magnets are arranged in an array along the first direction. The magnetic sensor determines the position of the first lens based on the magnetic field of the plurality of first sensing magnets.

7. The lens module according to any one of claims 1 to 6, characterized in that, Also includes: The second carrier, the prism is disposed on the second carrier, a part of the second driving member is disposed on the second carrier, and the second carrier is provided with a mounting groove; The first rotating part includes at least two first balls, a portion of which is embedded in the mounting groove. The at least two first balls are spaced apart along the second direction so that the prism rotates relative to the rotating bracket about the second direction. When the prism rotates about the third direction, the rotating bracket is limited to the second carrier through the mounting groove so that the rotating bracket rotates with the prism about the third direction.

8. The lens module according to claim 7, characterized in that, Also includes: At least two elastic elements are provided, at least two of the elastic elements are located on the side of the prism away from the first lens along the first direction, at least two elastic elements are spaced apart along the second direction, one end of any elastic element is connected to the housing and the other end is connected to the rotating bracket, and the elastic element is capable of resetting the prism; The second rotating part includes a second ball bearing, and the rotating bracket is supported on the housing by the second ball bearing.

9. The lens module according to claim 6, characterized in that, The second driving element includes: The second driving magnet and the second coil are located on the side of the prism away from the light-transmitting hole along the third direction. The second driving magnet is disposed in one of the housing and the prism, and the second coil is disposed in the other of the housing and the prism. When the second coil is energized, the second coil and the second driving magnet can drive the prism to rotate around the second direction. A third driving magnet and a third coil are located on the side of the prism away from the first lens along the second direction. The third driving magnet is disposed in one of the housing and the prism, and the third coil is disposed in the other of the housing and the prism. When the third coil is energized, the third coil and the third driving magnet can drive the prism to rotate around the third direction.

10. The lens module according to claim 9, characterized in that, Also includes: A second sensing magnet and a first sensing chip, one of which is disposed on the prism and the other is disposed on the housing, the second sensing magnet and the first sensing chip are arranged opposite to each other along the third direction, for detecting the position information of the prism when it rotates along the second direction based on the magnetic field of the second driving magnet and the second sensing magnet; and / or A third sensing magnet and a second sensing chip are disposed on the prism and the other is disposed on the housing. The third sensing magnet and the second sensing chip are arranged opposite to each other along the second direction, and are used to detect the position information of the prism when it rotates along the third direction based on the magnetic field of the third sensing magnet and the third driving magnet.

11. An electronic device, characterized in that, include: Frame; and The lens module as described in any one of claims 1 to 10, wherein the lens module is disposed in the frame.

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