Lens focusing assembly, camera module and electronic equipment

Abstract

The utility model provides a lens focusing assembly, a camera module and electronic equipment. The lens focusing assembly comprises a first lens mounting seat, a shell and a displacement detection device. The displacement detection device adopts a magnetic sensor and three magnetic pieces (detection magnetic assemblies) to carry out position detection. Wherein the polarities of the magnetic poles on the two sides of each of the first magnetic piece and the third magnetic piece in the second direction are opposite, and the polarities of the magnetic poles on the two sides of the second magnetic piece in the first direction are opposite. And the polarity of the second magnetic piece close to the first magnetic piece and the third magnetic piece is the same as the magnetic pole polarity of the sides, facing the shell, of the first magnetic piece and the third magnetic piece. When the magnetic sensor fixedly arranged on the shell translates relative to the detection magnetic assembly fixedly arranged on the first lens mounting seat, the position of the corresponding magnetic field intensity peak value is farther away from the second magnetic piece, so that the effective detection stroke of the displacement detection device is effectively increased, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a lens focusing assembly, a camera module and an electronic device. Background Art

[0002] In recent years, as the technology of electronic devices is updated faster and faster, users have higher and higher requirements for the imaging quality of camera modules. In order to improve the imaging quality of camera modules, more and more camera modules of electronic devices are equipped with anti-shake and automatic zoom functions. In order to compensate for the impact of shaking and realize the automatic zoom function, sensors with long-stroke and high-precision position detection functions are required for position feedback.

[0003] In the prior art, the displacement detection device of the lens focusing assembly in the camera module usually realizes position detection through the mutual cooperation between the magnetic sensor and the magnetic assembly. Among them, the magnetic assembly includes two magnetic parts, which are fixedly arranged adjacently along the first direction (the first direction is the optical axis direction) on the moving part of the lens focusing assembly (i.e., the lens mounting seat for mounting the lens lens group, which can also be called the mover), and the magnetic poles on the same side are in opposite directions; and the magnetic sensor is fixedly arranged on the fixed part of the lens focusing assembly (i.e., the housing, which can also be called the stator), and is arranged corresponding to the magnetic assembly. The magnetic field strength around the magnetic assembly is different. When the magnetic assembly moves relative to the fixed part along the first direction with the moving part of the lens focusing assembly, the relative position of the magnetic sensor and the magnetic assembly changes, and the magnetic field strength detected by the magnetic sensor changes. The controller (for example, it can be a chip) determines the real-time position of the moving part according to the change of the received magnetic field strength, so as to control the driving device of the lens focusing assembly to drive the moving part to move to the target position according to the real-time position. However, during the movement of the moving part, the magnetic field strength detected by the magnetic sensor when the moving part moves to each position is different, so that the current position of the moving part can be accurately confirmed. The magnetic field strengths of the two magnetic parts are different within a certain size range (along the first direction) around the junction, and the size range is the distance between the positions corresponding to the peak values ​​of the magnetic field strength detected by the magnetic sensor when it is translated relative to the magnetic component along the first direction. Therefore, the effective detection range of the magnetic sensor can be understood as the distance between the positions corresponding to the peak values ​​of the magnetic field strength around the junction of the two magnetic parts.

[0004] In an exemplary scenario, the displacement detection device of the lens focus assembly uses a sensor plus two magnetic parts to detect the position, but the distance between the positions corresponding to the peak values ​​of the magnetic field intensity around the junction of the two magnetic parts in this method is within 1 mm, that is, the effective detection stroke of the magnetic sensor is within 1 mm, and the effective detection stroke is short. In another exemplary scenario, the displacement detection device of the lens focus assembly uses two or three sensors plus two magnetic parts to detect the position, and the effective detection stroke of each sensor is calculated after appropriate comprehensive calculation to obtain the total effective detection stroke. Although the total effective detection stroke is improved compared to the case of a single sensor, it is up to 2 mm and cannot be further improved. However, multiple sensors will increase the cost of the lens focus assembly and require more magnetic field signal collection channels, which increases the operating burden of the controller, requires high technical capabilities of the controller, and has limited applicability.

[0005] It can be seen that the effective detection stroke of the displacement detection device of the lens focus assembly in the prior art is small, and the detection cost of the solution using multiple sensors is high, the technical capability requirements of the controller are high, and the applicability is relatively limited. Utility Model Content

[0006] The present application provides a lens focusing assembly, a camera module and an electronic device, which solve the problems in the prior art that the effective detection stroke of the displacement detection device of the lens focusing assembly is small, the detection cost of the solution using multiple sensors is high, the technical capability requirements of the controller are high, and the applicability is relatively limited.

[0007] The embodiment of the present application provides a lens focusing assembly, comprising a first lens mounting seat, a housing and a displacement detection device. The first lens mounting seat is used to mount a first lens group of the lens, and the first lens mounting seat is slidably connected in the housing along a first direction.

[0008] The displacement detection device comprises a detection magnetic component and a magnetic sensor. The detection magnetic component is fixedly arranged on the first lens mounting seat, and the magnetic sensor is fixedly arranged on the position of the shell corresponding to the detection magnetic component.

[0009] The detection magnetic component includes a first magnetic component, a second magnetic component and a third magnetic component sequentially arranged in a first direction, the magnetic poles of each of the first magnetic component and the third magnetic component are opposite in polarity on both sides along the second direction, the magnetic poles of the second magnetic component are opposite in polarity on both sides along the first direction, the magnetic poles of the first magnetic component facing the housing are the same as the magnetic poles of the second magnetic component close to the first magnetic component, and the magnetic poles of the third magnetic component facing the housing are the same as the magnetic poles of the second magnetic component close to the third magnetic component. The first direction is the optical axis direction of the first lens group, and the second direction is perpendicular to the first direction.

[0010] The displacement detection device of the lens focusing assembly in the present application uses a magnetic sensor plus three magnetic parts to perform position detection. Specifically, the polarity of the magnetic poles on both sides of each magnetic part in the first magnetic part and the third magnetic part is opposite, and the polarity of the magnetic poles on both sides of the second magnetic part in the first direction is opposite (or it can be understood that the first magnetic part and the third magnetic part are magnetized along the second direction, the second magnetic part is magnetized along the first direction, and the magnetization direction of the second magnetic part is perpendicular to the magnetization direction of the first magnetic part and the third magnetic part). In addition, the polarity of the second magnetic part close to the first magnetic part and the third magnetic part is the same as the polarity of the magnetic poles on the side of the first magnetic part and the third magnetic part facing the shell. The distribution of the magnetic pole polarity of the three magnetic parts in the detection magnetic assembly will make the translation position corresponding to the detected magnetic field intensity peak further away from the second magnetic part when the magnetic sensor is translated relative to the detection magnet assembly along the first direction (or it can be understood that the distance between the translation positions corresponding to the detected magnetic field intensity peaks increases), which greatly increases the effective detection stroke of the magnetic sensor (for example, the effective detection stroke can reach more than 2mm, or even more than 6mm). Moreover, only one magnetic sensor is used in the displacement detection device of this embodiment, which effectively reduces the cost of the lens focusing assembly compared to the method of two or three sensors, and has low technical capability requirements for the controller (for example, a chip), and has wider applicability.

[0011] Therefore, the lens focusing assembly provided in the embodiment of the present application only needs to use one magnetic sensor plus three magnetic parts to perform position detection. By setting the magnetic pole polarity distribution of the three magnetic parts in the detection magnetic assembly, the position of the corresponding peak value of the magnetic field intensity can be made farther away from the second magnetic part when the magnetic sensor is relatively translated in the detection magnetic assembly, thereby effectively increasing the effective detection stroke of the displacement detection device. And only one magnetic sensor is used, which reduces the cost of the lens focusing assembly, has low technical capability requirements for the controller, and has wider applicability. Thus, the problem that the displacement detection device of the lens focusing assembly in the prior art has a small effective detection stroke, and the detection cost of the solution using multiple sensors is high, the technical capability requirements for the controller are high, and the applicability is relatively limited is solved.

[0012] In some embodiments, there are two displacement detection devices, and the two displacement detection devices are respectively disposed between two sides of the first lens mounting seat along the second direction and corresponding sides of the housing.

[0013] By adopting the above solution, displacement detection devices are provided on both sides of the first lens mounting seat along the second direction, which can effectively avoid the adverse effect on the position detection accuracy when the first lens mounting seat is offset relative to the housing along the second direction, thereby avoiding the adverse effect on the focus / zoom effect of the lens focusing assembly.

[0014] In some embodiments, the two displacement detection devices are symmetrically arranged. With such a design, when the first lens mounting seat is offset relative to the housing in the second direction, it is easier to perform fitting calculation on the sensing signal, thereby reducing the calculation burden of the controller.

[0015] In some embodiments, the lens focusing assembly further includes a driving device, the driving device is used to drive the first lens mounting seat to slide relative to the housing along a first direction, and includes a driving magnetic assembly and a coil, the driving magnetic assembly is fixedly disposed on the first lens mounting seat, and the coil is fixedly disposed on the housing at a position corresponding to the driving magnetic assembly. The detection magnetic assembly is reused as the driving magnetic assembly.

[0016] Through such a design, the detection magnetic component is reused as the driving magnetic component, which reduces the volume of the lens focusing component, is conducive to the miniaturization of electronic equipment, and is conducive to reducing the production cost of the lens focusing component.

[0017] In some embodiments, the size of the second magnetic member in the first direction is 0.4 mm-5 mm. Through such a design, the effective detection stroke of the displacement detection device is effectively improved within the limited space of the lens focusing assembly.

[0018] In some embodiments, the first magnetic member and the third magnetic member have the same size in the first direction. With the above solution, the first magnetic member and the third magnetic member have better interchangeability, which facilitates the production of the lens focusing assembly and reduces costs.

[0019] In some embodiments, the detection direction of the magnetic sensor is the second direction.

[0020] In some embodiments, the lens focusing assembly also includes a second lens mount, which is used for a second lens group of the lens. The second lens mount is slidably connected to the housing along a first direction and is arranged opposite to the first lens mount in the first direction.

[0021] With such a design, the second lens mount is arranged opposite to the first lens mount along the first direction, and the focusing or zooming function of the lens focusing assembly can be better realized by adjusting the distance between the first lens group and the second lens group.

[0022] In some embodiments, each magnetic member is a magnet or a magnet, so that the raw materials for producing the magnetic member are relatively common and the production cost is low.

[0023] The embodiment of the present application also provides a camera module, including a lens and a lens focusing assembly provided by any of the above embodiments, wherein the lens includes a first lens group, and the first lens group is mounted on a first lens mounting seat of the lens focusing assembly. By using the lens focusing assembly provided by any of the above embodiments in the camera module of the present application, the camera module can achieve long-stroke focusing and zooming functions while reducing production costs.

[0024] In some embodiments, the camera module further includes a front prism and an image sensor, wherein the front prism is disposed in front of the first lens group along the light incident direction, and the image sensor is disposed behind the first lens group along the light incident direction.

[0025] The embodiment of the present application also provides an electronic device, including a housing and a camera module provided by any of the above embodiments, wherein the camera module is mounted on the housing. The camera module provided by any of the above embodiments is used in the electronic device of the present application to achieve long-range focusing and zooming functions, better imaging effects when shooting distant scenes, and lower manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1a It is a schematic diagram of the arrangement of the displacement detection device in the first lens focusing assembly;

[0027] Figure 1b A schematic diagram of the magnetic field distribution of the detection magnetic component in the first lens focusing component;

[0028] Figure 1c A schematic diagram of the magnetic field distribution of a detection magnetic component in a first lens focusing assembly, wherein the size of the magnetic component in the first direction is relatively large;

[0029] Figure 1d is a schematic diagram of the arrangement of the displacement detection device in the second lens focusing assembly;

[0030] Figure 1e is a schematic diagram of the arrangement of the displacement detection device in the third lens focusing assembly;

[0031] Figure 1f It is a schematic diagram of the effective detection stroke of the displacement detection device in the second lens focusing assembly;

[0032] Figure 2 It is the stroke-magnetic field intensity variation curve of different displacement detection devices in the lens focusing assembly;

[0033] Figure 3a A schematic diagram of the structure of an electronic device according to an embodiment of the present application from a front perspective;

[0034] Figure 3b for Figure 3a Schematic diagram of the decomposition structure;

[0035] Figure 3c for Figure 3a Schematic cross-sectional view along the AA direction;

[0036] Figure 4 A schematic diagram of the three-dimensional structure of the electronic device according to an embodiment of the present application from a rear perspective;

[0037] Figure 5 This is a schematic diagram of an exemplary structure of a camera module according to an embodiment of the present application;

[0038] Figure 6 A schematic diagram of the control principle of the electronic device according to an embodiment of the present application;

[0039] Figures 7 to 15a It is a schematic diagram of the principle of other exemplary structures of the camera module of the embodiment of the present application;

[0040] Fig.15b This is a schematic diagram of the principle of the lens focusing assembly of the embodiment of the present application;

[0041] Fig.16 This is a schematic diagram of the control principle of the camera module according to an embodiment of the present application;

[0042] Fig.17a This is a schematic diagram of the magnetic field distribution of the detection magnetic component in the lens focusing assembly of the embodiment of the present application;

[0043] Fig.17b This is a schematic diagram of an arrangement of a displacement detection device in a lens focus assembly according to an embodiment of the present application, wherein the magnetic pole of the second magnet close to the first magnet is the N pole;

[0044] Fig.17c This is another schematic diagram of the arrangement of the displacement detection device in the lens focus assembly of the embodiment of the present application, wherein the magnetic pole of the second magnet close to the direction of the first magnet is the S pole;

[0045] Fig.18 This is another schematic diagram of the arrangement of the displacement detection device in the lens focus assembly of the embodiment of the present application, wherein each magnetic component in the detection magnetic component is composed of a plurality of sub-magnetic components;

[0046] Fig.19 This is a schematic diagram of the magnetic field distribution of another magnetic detection component in the lens focusing assembly of the embodiment of the present application;

[0047] Fig. 20 The stroke-magnetic field intensity variation curve when the second magnet in the lens focusing assembly of the embodiment of the present application is of different lengths;

[0048] Fig.21 This is a schematic diagram of the arrangement of another magnetic detection component in the lens focusing assembly of the embodiment of the present application;

[0049] Fig. 22 Schematic diagram of the arrangement of the displacement detection device in the lens focusing assembly of the embodiment of the present application, wherein the lens focusing assembly includes two displacement detection devices;

[0050] Fig.23 It is a schematic diagram of the arrangement of the displacement detection device in the lens focusing assembly of the embodiment of the present application, wherein the displacement detection device is offset along the second direction;

[0051] Fig.24 It is a stroke-magnetic field intensity variation curve when the displacement detection device in the lens focusing assembly of the embodiment of the present application is displaced along the second direction;

[0052] Fig.25 A correction curve of travel-magnetic field strength when the displacement detection device in the lens focusing assembly of the embodiment of the present application is displaced along the second direction;

[0053] Fig.26a It is a schematic diagram of the arrangement of the displacement detection device in the lens focusing assembly of the embodiment of the present application, wherein one detection magnetic assembly is reused as a driving magnetic assembly, and the other detection magnetic assembly is not reused as a driving magnetic assembly;

[0054] Figure 26b This is a schematic diagram of the arrangement of the displacement detection device in the lens focus assembly of the embodiment of the present application, wherein only part of the driving magnetic assembly is reused from the detection magnetic assembly;

[0055] Fig. 27 A schematic diagram of a three-dimensional structure of an exemplary structure of a lens focusing assembly according to an embodiment of the present application;

[0056] Fig.28 Schematic diagram of the three-dimensional structure of the lens focusing assembly of the embodiment of the present application, wherein the upper shell of the lens focusing assembly is not shown;

[0057] Fig.29 This is a schematic diagram of the three-dimensional structure of the lens focusing assembly according to an embodiment of the present application, wherein the housing of the lens focusing assembly is not shown;

[0058] Fig.30 This is a schematic diagram of the exploded structure of another lens focusing assembly according to an embodiment of the present application, wherein the housing of the lens focusing assembly is not shown;

[0059] Fig.31 for Fig.29 A schematic cross-sectional view in the middle BB direction, wherein the guide rail is not shown;

[0060] Fig.32 It is a schematic cross-sectional structure diagram of the magnetic components of the detection magnetic assembly in the lens focusing assembly of the embodiment of the present application when they are arranged at intervals, wherein the housing of the lens focusing assembly is not shown;

[0061] Fig.33 This is a schematic diagram of the three-dimensional structure of another lens focusing assembly according to an embodiment of the present application, wherein the upper shell of the lens focusing assembly is not shown;

[0062] Fig.34 This is a schematic diagram of a three-dimensional structure of another lens focusing assembly according to an embodiment of the present application, wherein the housing of the lens focusing assembly is not shown;

[0063] Fig.35 This is a schematic diagram of the three-dimensional structure of another lens focusing assembly according to an embodiment of the present application, wherein the housing, coil and other structures of the lens focusing assembly are not shown.

[0064] Description of reference numerals:

[0065] Some solutions:

[0066] 2', lens focusing assembly;

[0067] 4', displacement detection device; 41', magnetic sensor; 42', magnetic component; 43', magnetic member;

[0068] 9', moving parts;

[0069] X', first direction.

[0070] This application:

[0071] 100. Electronic equipment;

[0072] 101. Display screen;

[0073] 102, housing; 103, back cover; 104, middle frame; 105, bottom plate; 106, outer frame;

[0074] 108. Motherboard; 109. Processor;

[0075] 1. Camera module; 11. Controller; 12. Rear prism; 13. Front prism; 14. Image sensor; 15. Lens; 16. First lens group; 17. Second lens group; 18. Other lens groups;

[0076] 2. Lens focusing assembly; 21. Magnetic isolation sheet; 22. Circuit board; 23. Non-magnetic conductive components;

[0077] 3. outer shell; 31. upper shell; 32. lower shell; 33. third groove;

[0078] 4. displacement detection device; 41. magnetic sensor; 42. detection magnetic component; 43. first magnetic component; 44. second magnetic component; 45. third magnetic component;

[0079] 5. driving device; 51. coil; 52. driving magnetic component;

[0080] 6. First lens mounting seat; 61. First groove; 62. Mounting hole; 63. Second groove;

[0081] 7. Second lens mounting seat;

[0082] 8. Guide device; 81. Guide rail; 82. Ball bearing;

[0083] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0084] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0085] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0086] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0087] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0088] In the description of the present application, it should be understood that "electrical connection" in the present application can be understood as physical contact and electrical conduction between components; it can also be understood as a form in which different components in a circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals.

[0089] In the description of the present application, it should be noted that the mutual perpendicularity in the present application is not absolute perpendicularity, and the approximate perpendicularity caused by processing errors and assembly errors (for example, the angle between the two structural features is 89.9°) is also within the scope of the mutual perpendicularity in the present application. The mutual parallelism in the present application is also not absolute parallelism, and the approximate parallelism caused by processing errors and assembly errors (for example, the angle between the two structural features is 0.1°) is also within the scope of the mutual parallelism in the present application. The present application does not make specific limitations on this.

[0090] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0091] See also Figure 1a to Figure 2 , Figure 1a It is a schematic diagram of the arrangement of the displacement detection device in the first lens focusing assembly; Figure 1b A schematic diagram of the magnetic field distribution of the detection magnetic component in the first lens focusing component; Figure 1c A schematic diagram of the magnetic field distribution of a detection magnetic component in a first lens focusing assembly, wherein the size of the magnetic component in the first direction is relatively large; Figure 1d is a schematic diagram of the arrangement of the displacement detection device in the second lens focusing assembly; Figure 1e is a schematic diagram of the arrangement of the displacement detection device in the third lens focusing assembly; Figure 1f It is a schematic diagram of the effective detection stroke of the displacement detection device in the second lens focusing assembly; Figure 2 It is the stroke-magnetic field intensity variation curve of different displacement detection devices in the lens focusing assembly.

[0092] As the technology of electronic devices is updated faster and faster, users have higher and higher requirements for the imaging quality of camera modules. In order to improve the imaging quality of camera modules, more and more camera modules of electronic devices are equipped with anti-shake and automatic zoom functions. In order to compensate for the impact of shaking and realize the automatic zoom function, sensors with long-stroke and high-precision position detection functions are needed for position feedback.

[0093] In the prior art, Figure 1a and Figure 1b As shown, the displacement detection device 4' of the lens focusing assembly 2' in the camera module usually realizes position detection through the mutual cooperation between the magnetic sensor 41' and the magnetic assembly 42'. Among them, the magnetic assembly 42' includes two magnetic parts 43', and the two magnetic parts 43' are fixedly arranged on the moving part 9' (i.e., the lens mounting seat for mounting the lens lens group, which can also be called the mover) of the lens focusing assembly 2' adjacently along the first direction X' (the first direction X' is the optical axis direction), and the magnetic poles on the same side are in opposite directions; and the magnetic sensor 41' is fixedly arranged on the fixing part (i.e., the outer shell, which can also be called the stator, not shown in the figure) of the lens focusing assembly 2', and is arranged corresponding to the magnetic assembly 42'. The magnetic field strength around the magnetic component 42' is different. When the magnetic component 42' moves along the first direction X' with the moving part 9' of the lens focusing component 2' relative to the fixed part, the relative position of the magnetic sensor 41' and the magnetic component 42' changes, and the magnetic field strength detected by the magnetic sensor 41' changes. The controller (for example, it can be a chip) determines the real-time position of the moving part 9' according to the change in the received magnetic field strength, and then controls the driving device 5' of the lens focusing component 2' to drive the moving part 9' to the target position according to the real-time position. However, during the movement of the moving part 9', the magnetic field strength detected by the magnetic sensor 41' when the moving part 9' moves to each position is different, so that the current position of the moving part 9' can be accurately confirmed. The magnetic field strength of the two magnetic parts 43' is different within a certain size range (along the first direction X') around the junction. The size range is the distance between the positions corresponding to the peak values ​​of the detected magnetic field strength when the magnetic sensor 41' translates along the first direction X' relative to the magnetic component 42'. When the magnetic sensor 41' moves along the first direction X' to a position farther away from the junction of the magnetic parts 43', the displacement-magnetic field strength change curve will gradually become flat, and the magnetic field strength at multiple positions will be equal, affecting the detection position of the magnetic sensor 41'. Therefore, the effective detection range of the magnetic sensor 41' can be understood as the distance between the positions corresponding to the peak value of the magnetic field strength around the junction of the two magnetic parts 43'.

[0094] In one embodiment, if Figure 1a and Figure 1bAs shown, the displacement detection device 4' of the lens focusing assembly 2' adopts a sensor plus two magnetic members 43' to perform position detection. However, in this method, the distance between the positions corresponding to the peak values ​​of the magnetic field intensity around the junction of the two magnetic members 43' is within 1 mm, that is, the effective detection stroke of the magnetic sensor 41' is within 1 mm (such as Figure 2 The effective detection stroke is shorter (as shown in the middle curve S1).

[0095] It should be noted that if Figure 1c As shown, the size of the magnetic member 43' in the first direction X' has no obvious effect on the distance between the positions corresponding to the peak values ​​of the magnetic field intensity (or can be understood as the effective detection stroke of the magnetic sensor 41'). Increasing the size of the magnetic member 43' will only increase the flat area of ​​the displacement-magnetic field intensity curve, and cannot increase the effective detection stroke of the magnetic sensor 41'.

[0096] In another embodiment, Figure 1d and Figure 1e As shown, the displacement detection device 4' of the lens focus assembly 2' adopts two or three magnetic sensors 41' plus two magnetic members 43' to perform position detection. The effective detection stroke of each sensor is calculated after appropriate comprehensive calculation to obtain the total effective detection stroke. Although the total effective detection stroke is improved compared with the case of a single magnetic sensor 41', it is up to 2mm (e.g. Figure 2 However, multiple sensors will increase the cost of the lens focusing assembly 2' and require more magnetic field signal collection channels, which increases the operating burden of the controller, requires high technical capabilities of the controller, and has limited applicability.

[0097] It should be noted that the calculation method of the effective detection stroke of the multi-sensor solution is described by taking two magnetic sensors plus two magnetic members 43' as an example. Figure 1f As shown, the sum of the distances X2 between the leftmost magnetic field intensity peak detected by the left magnetic sensor and the rightmost magnetic field intensity peak detected by the right magnetic sensor is the effective detection range of the two magnetic sensors plus two magnetic members 43', which is increased compared to the effective detection range X1 of the single sensor solution.

[0098] Furthermore, if Figure 2As shown, the displacement-magnetic field strength curve of one of the two magnetic sensors 41' is shown in S2, and the displacement-magnetic field strength curve of the other magnetic sensor 41' is shown in S3. By analyzing the displacement-magnetic field strength curves S2 and S3, it can be seen that the effective detection stroke of the two magnetic sensors 41' is within 1mm. The displacement-magnetic field strength curve of the method of two magnetic sensors plus two magnetic parts 43' is shown in S4, and the displacement-magnetic field strength curve of the method of three magnetic sensors plus two magnetic parts 43' is shown in S5. Figure 2 From the curves S4 and S5 in FIG. 4 , it can be seen that the effective detection stroke of the method of two or three magnetic sensors plus two magnetic members 43 ′ can reach up to 2 mm.

[0099] Based on this, the present application provides a lens focusing assembly, in which the displacement detection device in the lens focusing assembly only needs to use a magnetic sensor plus three magnetic parts to perform position detection. By setting the magnetic pole polarity distribution of the three magnetic parts in the detection magnetic assembly, the position of the corresponding magnetic field intensity peak when the magnetic sensor is relatively detected by the translation of the magnetic assembly can be further away from the second magnetic part located in the middle position (or it can be understood that the distance between the positions corresponding to the magnetic field intensity peak is increased), thereby effectively increasing the effective detection stroke of the displacement detection device. And only one magnetic sensor is used, which reduces the cost of the lens focusing assembly, has low technical capability requirements for the controller, and has wider applicability. Therefore, it solves the problems in the prior art that the effective detection stroke of the displacement detection device of the lens focusing assembly is small, and the detection cost of the solution using multiple sensors is high, the technical capability requirements for the controller are high, and the applicability is relatively limited.

[0100] The present application also provides an electronic device, which uses the above-mentioned lens focusing assembly. It should be noted that the electronic device is a type of electronic device equipped with a camera, specifically including but not limited to a display, a notebook computer, a tablet personal computer, a personal digital assistant (PDA), a personal computer (PC), a smart phone, a smart wearable device, and a vehicle-mounted device, which does not limit the scope of protection of the present application. For the convenience of explanation, the following description takes the electronic device as a mobile phone as an example.

[0101] See also Figures 3a to 4 , Figure 3a A schematic diagram of the structure of an electronic device according to an embodiment of the present application from a front perspective; Figure 3b for Figure 3a Schematic diagram of the decomposition structure; Figure 3c for Figure 3a Schematic cross-sectional view along the AA direction; Figure 4It is a schematic diagram of the three-dimensional structure of the electronic device according to an embodiment of the present application from a rear perspective.

[0102] like Figure 3a to Figure 3c As shown, the electronic device 100 includes a housing 102, a camera module 1, a display screen 101 installed in the housing 102, and a circuit board (not shown in the figure). The housing 102 plays the role of protecting the electronic device 100 and supporting the whole machine. A storage space is formed inside the housing 102 for accommodating components of the electronic device 100. The display screen 101 and the circuit board are arranged in the storage space of the housing 102 and connected to the housing 102. The camera module 1 is installed in the housing 102. The camera module 1 can realize long-stroke focus and zoom functions, and the imaging effect is better when shooting distant pictures, and the manufacturing cost is lower.

[0103] It can be understood by those skilled in the art that the specific structure of the housing 102 is not limited. In one embodiment, the housing 102 includes a middle frame 104 and a back cover 103, the middle frame 104 includes a bottom plate 105 and an outer frame 106 arranged around and connected to the outer peripheral side of the bottom plate 105, and in the thickness direction of the electronic device 100, the display screen 101 and the back cover 103 are respectively installed at both ends of the outer frame 106, so that the display screen 101 and the back cover 103 are respectively located on both sides of the bottom plate 105. An installation cavity is formed between the back cover 103 and the bottom plate 105 for installing internal components such as batteries, circuit boards, cameras, antennas, etc. In one embodiment, the circuit board is installed in the installation cavity between the back cover 103 and the bottom plate 105.

[0104] Those skilled in the art will appreciate that the bottom plate 105 is a support frame located inside the electronic device 100. The outer frame 106 is a structure surrounding the outer periphery of the electronic device 100. Figure 3c The outer frame 106 may extend around the periphery of the electronic device 100 and the display screen 101, and specifically may surround the four sides of the display screen 101 to help fix the display screen 101. In some embodiments, the outer frame 106 may be a metal frame, and the metal frame is made of metal materials such as copper, magnesium alloy, stainless steel, etc. In other embodiments, the outer frame 106 may also be a non-metal frame (i.e., an insulating frame), and the non-metal frame includes a plastic frame, a glass frame, a ceramic frame, etc., and may also be a structure combining a metal frame and a non-metal frame.

[0105] It should be noted that the bottom plate 105 and the outer frame 106 can be a split structure or an integrated structure, which is not limited in the embodiments of the present application. When the bottom plate 105 and the outer frame 106 are split structures, the bottom plate 105 and the outer frame 106 are two different components of the housing 102, and the two can be assembled together by means of snap connection, buckling, etc., and the two can be separated when disassembly is required. When the bottom plate 105 and the outer frame 106 are an integrated structure, the connection relationship between the bottom plate 105 and the outer frame 106 cannot be separated, for example, the bottom plate 105 and the outer frame 106 are processed and made by an integrated molding method, or assembled by a permanent connection method such as welding, etc.

[0106] Among them, the back cover 103 is a structure arranged on the electronic device 100 opposite to the display screen 101, which is used to seal the components of the electronic device 100 inside the electronic device 100, and can also prevent dust, collision, and hardware scratches. The back cover 103 can be a back cover made of metal material (i.e., a metal back cover), or a back cover made of non-conductive material (i.e., a non-metal back cover), such as a glass back cover, a plastic back cover, etc. In some embodiments, the electronic device 100 may not include a separately arranged back cover 103, but the bottom plate 105 of the middle frame 104 is used as the back cover 103, and this application does not limit this. The above is a detailed introduction to the housing 102 of the electronic device 100, and the other components will be described below.

[0107] As a carrier for electrical connection of electronic components, the circuit board can be the main board 108 of the electronic device 100, or it can be a sub-board (such as the sub-board of a folding screen mobile phone). In one embodiment, the circuit board is the main board 108 of the electronic device 100. The size of the circuit board and its position in the electronic device 100 are not limited. The figure is only for illustration and does not limit the scope of the embodiments of the present application. The circuit board includes multiple functional modules (not shown in the figure) connected to each other to realize corresponding functions, such as a charging management module, a power management module, wireless communication, an audio module, etc., which are not limited in this application.

[0108] In one embodiment, the electronic device 100 further includes a processor 109 (not shown in the figure). The processor 109 can implement functions such as running an operating system, processing various data, running application programs, and controlling multiple hardware connected to the processor 109.

[0109] Further, the display screen 101 of the electronic device 100 is used to display images, and its specific type is not limited, and can be, but not limited to, an organic light-emitting diode (OLED) display screen 101, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a microorganic light-emitting diode display screen, or a quantum dot light-emitting diode (QLED) display screen, etc., and the present application does not impose any restrictions on this. The user can interact with the electronic device 100 through the display screen 101 and use a camera to perform operations such as video recording and taking photos.

[0110] It should be noted that the camera module 1 can be installed in any position in the electronic device 100 according to the needs. For example, it can be installed on the front, back or side of the electronic device 100. In this embodiment of the application, the side where the display screen 101 of the electronic device 100 is located is defined as the front of the electronic device 100, the side where the back cover 103 of the electronic device 100 is located is defined as the back of the electronic device 100, and the surface connecting the front and back of the electronic device 100 is defined as the side of the electronic device 100. In one embodiment, Figure 4 As shown, the camera module 1 is disposed on the back of the electronic device 100 .

[0111] The above is an introduction to the structure of the electronic device 100 and the functions of its components. The following will continue to describe the system composition and structural composition of the camera module 1.

[0112] See also Figures 5 to 15a , Figure 5 This is a schematic diagram of an exemplary structure of a camera module according to an embodiment of the present application; Figure 6 A schematic diagram of the control principle of the electronic device according to an embodiment of the present application; Figures 7 to 15a Schematic diagram of other exemplary structures of the camera module according to the embodiment of the present application.

[0113] like Figure 5As shown, the camera module 1 includes a lens focusing assembly 2, a lens 15 and an image sensor 14. The lens 15 includes a first lens group 16, and the first lens group 16 is mounted on the first lens mounting seat 6 of the lens focusing assembly 2. The first lens group 16 includes at least one lens (can be one or more, and the present application does not limit this), and the lens can be a lens. It should be noted that the lens group installed in the lens focusing assembly 2 (for example, the first lens group 16, and the second lens group 17 mentioned below) can be understood as an autofocus lens group.

[0114] The image sensor 14 is arranged behind the first lens group 16 along the light incident direction. The lens 15 can project the light emitted by the external light source onto the image sensor 14, and the image sensor 14 processes the received light to form an image. In order to realize the automatic zoom function of the camera module 1, it can be realized by moving the lens 15 or the image sensor 14. Therefore, the lens 15 can be used as a moving part, or the image sensor 14 can be used as a moving part. Exemplarily, the lens 15 is used as a moving part.

[0115] Furthermore, if Figure 6 As shown, the processor 109 on the mainboard 108 is connected to the camera module 1 in communication, and the camera module 1 can obtain the light signal in the external environment, convert the light signal into an electrical signal, and then process the electrical signal to generate image information and send it to the processor 109 on the mainboard 108. At this time, the processor 109 can further process the image information transmitted by the camera module 1, and store or transmit the processed image information to the display screen 101 for display. Thus, the electronic device 100 can meet the user's needs for video calls, recording, shooting, etc.

[0116] The camera module 1 may include a controller 11, which includes an image processor (Image Signal Processor, ISP). When the camera module 1 is working, the lens 15 of the camera module 1 images the picture onto the surface of the image sensor 14, and the effective photosensitive area of ​​the image sensor converts the light signal of the picture into an electrical signal and transmits it to the image processor. At this time, the image processor generates picture information (i.e., external environment information), so that the picture information can be transmitted to the processor 109 of the electronic device 100. In addition, the controller 11 can control the lens focus assembly 2 to realize the automatic focus function, which will be described in detail below.

[0117] like Figure 7 As shown, the camera module 1 may further include a front prism 13, which is disposed in front of the first lens group 16 along the light incident direction. It can be understood that the front prism 13 is disposed in front of the lens focusing assembly 2 along the light incident direction.

[0118] like Figure 7 , Figure 12 to Figure 15a As shown, the camera module 1 may further include a rear prism 12, which is disposed behind the first lens group 16 along the light incident direction. It can be understood that the rear prism 12 is disposed behind the lens focusing assembly 2 along the light incident direction. Moreover, in the light incident direction, the rear prism 12 is located between the lens focusing assembly 2 and the image sensor 14. It should be noted that both the front prism 13 and the rear prism 12 can change the light transmission direction.

[0119] It should be noted that in the camera module 1, in addition to the lens group installed in the lens focusing assembly 2 (for example, the first lens group 16, and the second lens group 17 mentioned below), other lens groups 18 (such as Figure 7 , Figures 9 to 14 As shown, these lens groups can be understood as fixed lens groups), and other lens groups may not be additionally provided (such as Figure 8 , Fig.15a The specific design can be made according to the design requirements.

[0120] Furthermore, the number of other lens groups 18 additionally provided in the camera module 1 is not limited, and can be a group (such as Figure 7 , Fig. 9 , Fig.10 , Fig.13 and Fig.14 as shown) or multiple groups (as Fig.11 and Fig.12 As shown). In addition, the arrangement positions of other lens groups 18 are not limited. Figure 7 , Fig. 9 , Fig.11 As shown, it can be arranged between the lens focusing assembly 2 and the image sensor 14, such as Figures 10 to 13 As shown, it can also be arranged between the front prism 13 and the lens focusing assembly 2, such as Fig.12 , Fig.14 As shown, it can also be arranged between the rear prism 12 and the lens focusing assembly 2. The specific design can be made according to actual needs.

[0121] Among them, Figures 7 to 15a The image sensor 14 can be arranged in sequence with the lens focusing assembly 2 along the first direction X, or can be arranged in parallel with the lens focusing assembly 2 along the second direction Y. The second direction Y is perpendicular to the first direction X.

[0122] It should be noted that if Figure 12 to Figure 15a As shown, when the image sensor 14 is arranged in parallel with the lens focusing assembly 2 along the second direction Y, the incident direction of the light is the first direction X, and an additional front prism 13 needs to be arranged in the camera module 1 to change the propagation direction of the light so that the light can propagate into the image sensor 14.

[0123] The system composition and structural composition of the camera module 1 are described in detail above in conjunction with the accompanying drawings. The displacement detection method of the lens focusing assembly 2 is described in detail below in conjunction with the accompanying drawings.

[0124] See also Figures 15b to 21 , Fig.15b This is a schematic diagram of the principle of the lens focusing assembly of the embodiment of the present application; Fig.16 This is a schematic diagram of the control principle of the camera module according to an embodiment of the present application; Fig.17a This is a schematic diagram of the magnetic field distribution of the detection magnetic component in the lens focusing assembly of the embodiment of the present application;

[0125] Fig.17b This is a schematic diagram of an arrangement of a displacement detection device in a lens focus assembly according to an embodiment of the present application, wherein the magnetic pole of the second magnet close to the first magnet is the N pole; Fig.17c This is another schematic diagram of the arrangement of the displacement detection device in the lens focus assembly of the embodiment of the present application, wherein the magnetic pole of the second magnet close to the direction of the first magnet is the S pole; Fig.18 This is another schematic diagram of the arrangement of the displacement detection device in the lens focus assembly of the embodiment of the present application, wherein each magnetic component in the detection magnetic component is composed of a plurality of sub-magnetic components; Fig.19 This is a schematic diagram of the magnetic field distribution of another magnetic detection component in the lens focusing assembly of the embodiment of the present application; Fig. 20 The stroke-magnetic field intensity variation curve when the second magnet in the lens focusing assembly of the embodiment of the present application is of different lengths; Fig.21 This is a schematic diagram of the arrangement of another magnetic detection component in the lens focusing assembly of the embodiment of the present application.

[0126] like Fig.15b As shown, the lens focusing assembly 2 includes a first lens mounting seat 6, a housing 3 and a driving device 5. The first lens group 16 of the lens 15 is fixedly mounted on the first lens mounting seat 6. The first lens mounting seat 6 is arranged along a first direction X (for example, Fig.15b As shown in the figure, the first lens mounting seat 6 is slidably connected to the housing 3 (moving toward the left end or toward the right end in a first direction X). The first direction X is the optical axis direction of the first lens group 16. The driving device 5 is used to drive the first lens mounting seat 6 to slide along the first direction X relative to the housing 3.

[0127] It should be noted that the specific structure of the driving device 5 is not limited. In one embodiment, Fig.15bAs shown, the driving device 5 includes a driving magnetic component 52 and a coil 51, wherein the driving magnetic component 52 is fixedly arranged on the first lens mount 6, and the coil 51 is fixedly arranged at a position of the housing 3 corresponding to the driving magnetic component 52. When current flows through the coil 51, the coil 51 generates magnetism. When the direction of the current changes, the polarity of the magnetism generated by the coil 51 is reversed. The interaction (attractive force and repulsive force) between the magnetic coil 51 and the driving magnetic component 52 generates a force that moves the first lens mount 6 left and right in the first direction X. It can be understood that the magnitude of the driving force can be adjusted according to the magnitude of the current in the coil 51, thereby adjusting the moving distance of the first lens mount 6; the movement direction of the first lens mount 6 can be controlled by controlling the direction of the current in the coil 51.

[0128] like Fig.15b As shown, the lens focusing assembly 2 also includes a displacement detection device 4, which includes a detection magnetic assembly 42 and a magnetic sensor 41. The detection magnetic assembly 42 is fixedly arranged on the first lens mounting seat 6, and the magnetic sensor 41 is fixedly arranged at the position of the housing 3 corresponding to the magnetic sensor 41. When the first lens mounting seat 6 slides relative to the housing 3 in the first direction, the magnetic sensor 41 will also translate relative to the detection magnetic assembly 42 in the first direction, so that the magnetic field intensity detected by the magnetic sensor 41 changes. It should be noted that the number of magnetic sensors 41 in the displacement detection device 4 is not limited, and can be one or more (for example, the number of magnetic sensors 41 can be set to two, and the two magnetic sensors 41 can be arranged at intervals along the first direction X).

[0129] like Fig.16 As shown, the controller 11 of the camera module 1 is electrically connected to the position detection device and the driving device 5 in the lens focus assembly 2 respectively. The magnetic sensor 41 in the displacement detection device 4 is used to transmit the collected magnetic field strength information to the controller 11, and then the controller 11 determines the current position of the first lens mount 6 based on all the magnetic field strength information received. When the magnetic field strength at the current position detected by the magnetic sensor 41 is equal to the magnetic field strength at the target position, it can be known that the first lens mount 6 has moved to the target position. When there is a deviation between the current magnetic field strength detected by the magnetic sensor 41 and the magnetic field strength at the target position, the controller 11 will control the driving device 5 to drive the first lens mount 6 to move to the target position according to the deviation value between the current magnetic field strength detected by the magnetic sensor 41 and the magnetic field strength at the target position. Thereby ensuring the focus or zoom effect of the camera module 1.

[0130] Furthermore, if Fig.17a and Fig.17bAs shown, the detection magnetic component 42 includes a first magnetic member 43, a second magnetic member 44 and a third magnetic member 45 arranged in sequence in the first direction X, the magnetic pole polarities of each magnetic member in the first magnetic member 43 and the third magnetic member 45 on both sides along the second direction Y are opposite, the magnetic pole polarities of the second magnetic member 44 on both sides along the first direction X are opposite, the magnetic pole polarities of the first magnetic member 43 on the side facing the housing 3 are the same as the magnetic pole polarity of the second magnetic member 44 on the side close to the first magnetic member 43, and the magnetic pole polarity of the third magnetic member 45 on the side facing the housing 3 is the same as the magnetic pole polarity of the second magnetic member 44 on the side close to the third magnetic member 45. Among them, the second direction Y is perpendicular to the first direction X. The second direction Y can be the width direction of the lens focusing assembly 2 or the height direction of the lens focusing assembly 2, and the present application does not limit this.

[0131] It should be noted that each stroke value of the first lens mount 6 in the first direction X needs to correspond to a unique magnetic field strength, so that the first lens mount 6 can move to the target position according to the preset trajectory to better realize the automatic focusing function of the lens. The magnetic field strengths between the positions corresponding to the peak values ​​of the magnetic field strength are all different (or it can be understood that within the stroke range, the magnetic field strength changes basically linearly), and the effective detection stroke of the magnetic sensor 41 is the distance between the positions corresponding to the peak values ​​of the magnetic field strength of the magnetic sensor 41.

[0132] like Fig.17a As shown in FIG. 1 , when the distance between the first magnetic member 43 and the third magnetic member 45 is increased and the second magnetic member 44 is inserted in the middle, the N pole of the second magnetic member 44 repels the N pole of the first magnetic member 43, resulting in the position of the peak value of the magnetic field intensity on the left side (as shown in FIG. Fig.17a The position indicated by the straight line Q2 in the middle is far away from the junction of the first magnetic member 43 and the second magnetic member 44. The S pole of the second magnetic member 44 repels the S pole of the third magnetic member 45, resulting in the position of the peak magnetic field intensity on the right side (as shown in FIG. Fig.17a The position shown by the straight line Q3 in the middle is far away from the junction of the second magnetic member 44 and the third magnetic member 45. Or it can be understood that as the distance between the positions corresponding to the peak values ​​of the magnetic field intensity on the left and right sides increases, the effective detection stroke of the magnetic sensor 41 increases.

[0133] Furthermore, when the magnetic sensor 41 moves relative to the detection magnetic component 42 along the first direction X, within the travel range of the peak value of the magnetic field intensity, the farther the magnetic sensor 41 is from the middle area of ​​the detection magnetic component 42 in the first direction X, the stronger the corresponding magnetic field intensity. Exemplarily, the magnetic field intensity at the intersection point A of the motion trajectory Q1 of the magnetic sensor 41 relative to the detection magnetic component 42 and the equipotential lines of the magnetic field is greater than the magnetic field intensity at the intersection point B of the motion trajectory Q1 of the magnetic sensor 41 and the equipotential lines of the magnetic field, and the position corresponding to the intersection point A is farther away from the middle area of ​​the detection magnetic component 42 in the first direction X than the position corresponding to the intersection point B.

[0134] It should be noted that the magnetic pole of the second magnetic member 44 on the side close to the first magnetic member 43 along the first direction X can be an N pole or an S pole. The specific design can be based on the specific situation. In one embodiment, Fig.17b As shown, the magnetic pole of the second magnetic member 44 close to the first magnetic member 43 along the first direction X is an N pole, and the magnetic pole close to the third magnetic member 45 is an S pole. The magnetic pole polarity of the first magnetic member 43 facing the housing 3 is an N pole, and the magnetic pole polarity of the side away from the housing 3 is an S pole. The magnetic pole polarity of the third magnetic member 45 away from the housing 3 is an N pole, and the magnetic pole polarity of the side close to the housing 3 is an S pole.

[0135] In another embodiment, Fig.17c As shown, the magnetic pole of the second magnetic member 44 on the side close to the first magnetic member 43 along the first direction X is the S pole, and the magnetic pole on the side close to the third magnetic member 45 is the N pole. The magnetic pole polarity of the first magnetic member 43 on the side facing the housing 3 is the S pole, and the magnetic pole polarity on the side away from the housing 3 is the N pole. The magnetic pole polarity of the third magnetic member 45 on the side away from the housing 3 is the S pole, and the magnetic pole polarity on the side close to the housing 3 is the N pole.

[0136] like Fig.17bAs shown, the displacement detection device 4 of the lens focusing assembly 2 uses a magnetic sensor 41 plus three magnetic parts to perform position detection. Specifically, the polarity of the magnetic poles on both sides of each magnetic part in the second direction Y is opposite, and the polarity of the magnetic poles on both sides of the second magnetic part 44 in the first direction X is opposite (or it can be understood that the first magnetic part 43 and the third magnetic part 45 are magnetized along the second direction Y, and the second magnetic part 44 is magnetized along the first direction X, and the magnetization direction of the second magnetic part 44 is perpendicular to the magnetization direction of the first magnetic part 43 and the third magnetic part 45). In addition, the polarity of the second magnetic part 44 close to the first magnetic part 43 and the third magnetic part 45 is the same as the polarity of the magnetic poles of the first magnetic part 43 and the third magnetic part 45 facing the housing 3. The magnetic polarity distribution of the three magnetic parts in the magnetic sensor 41 will make the translation position corresponding to the detected peak value of the magnetic field intensity be further away from the second magnetic part 44 (or it can be understood that the distance between the translation positions corresponding to the detected peak values ​​of the magnetic field intensity increases) when the magnetic sensor 41 is translated along the first direction X relative to the detection magnet assembly, which greatly increases the effective detection stroke of the magnetic sensor 41 (for example, the effective detection stroke can reach more than 2mm, or even more than 6mm). In addition, only one magnetic sensor 41 is used in the displacement detection device 4 of this embodiment, which effectively reduces the cost of the lens focus assembly 2 compared to the method of two or three sensors, and has low technical requirements for the controller (for example, it can be a chip), and has a wider applicability.

[0137] Therefore, the lens focusing assembly 2 provided in the embodiment of the present application only needs to use a magnetic sensor 41 plus three magnetic parts to perform position detection. By setting the magnetic pole polarity distribution of the three magnetic parts in the magnetic sensor 41, the position of the corresponding peak value of the magnetic field intensity can be made farther away from the second magnetic part 44 when the magnetic sensor 41 is translated relative to the detection magnetic assembly 42, thereby effectively increasing the effective detection stroke of the displacement detection device 4. And only one magnetic sensor 41 is used, which reduces the cost of the lens focusing assembly 2, has low technical requirements for the controller, and has wider applicability. Thus, the problem that the effective detection stroke of the displacement detection device 4 of the lens focusing assembly 2 is small in the prior art, and the detection cost of the solution using multiple sensors is high, the technical requirements for the controller are high, and the applicability is relatively limited is solved.

[0138] like Fig.15bAs shown, the setting positions of the magnetic sensor 41 and the detection magnetic component 42 are not limited, as long as the magnetic sensor 41 and the detection magnetic component 42 are set correspondingly, that is, it is ensured that within the range of motion, the magnetic sensor 41 can detect the magnetic field strength of the detection magnetic component 42, and the magnetic field strength value changes basically linearly within the range of motion. For example, the magnetic sensor 41 can be arranged at the top of the outer shell 3 (the top along the height direction of the lens focusing assembly), and the detection magnetic component 42 is arranged at the top of the first lens mounting seat 6 (the top along the height direction of the lens focusing assembly), or the magnetic sensor 41 can be arranged at the bottom of the outer shell 3 (the bottom along the height direction of the lens focusing assembly), and the detection magnetic component 42 is arranged at the bottom of the first lens mounting seat 6 (the bottom along the height direction of the lens focusing assembly). In both cases, the second direction Y is the height direction of the lens focusing assembly 2; or the magnetic sensor 41 can be arranged on the side of the outer shell 3 (the side along the width direction of the lens focusing assembly), and the detection magnetic component 42 is arranged on the side of the first lens mounting seat 6 (the side along the width direction of the lens focusing assembly). At this time, the second direction Y is the width direction of the lens focusing assembly 2.

[0139] Furthermore, the locations of the drive magnetic assembly 52 and the coil 51 are not limited, as long as the two cooperate to drive the first lens mount 6 to move relative to the housing 3 along a preset trajectory. For example, the drive magnetic assembly 52 can be arranged at the top, bottom or side of the first lens mount 6, and the coil 51 can also be arranged at the top, bottom or side of the housing 3, and is arranged corresponding to the drive magnetic assembly 52 (for example, when the drive magnetic assembly 52 is arranged at the top of the first lens mount 6, the coil 51 is arranged at the top of the housing 3).

[0140] In addition, the driving magnetic component 52 and the detecting magnetic component 42 can be independently arranged (for example, the driving magnetic component 52 is arranged on the side of the first lens mounting seat 6, and the detecting magnetic component 42 is arranged on the top of the first lens mounting seat 6), or they can be partially or completely reused, and this application does not limit this. Fig.15b As shown, in one embodiment, the detection magnetic component 42 is reused as the driving magnetic component 52, which reduces the volume of the lens focusing component 2, is beneficial to the miniaturization of the electronic device 100, and is beneficial to reducing the production cost of the lens focusing component 2.

[0141] The detection direction of the magnetic sensor 41 is not limited. For example, it can be any angle direction perpendicular to the first direction X. Fig.15bAs shown, in one embodiment, the detection direction of the magnetic sensor 41 is the second direction Y. In addition, other components that have no effect on the magnetic field or have a negligible effect may be arranged between the magnetic sensor 41 and the detection magnetic component 42, or other components may not be arranged. In one embodiment, no other components are arranged between the magnetic sensor 41 and the detection magnetic component 42.

[0142] Furthermore, the distance between the magnetic sensor 41 and the detection magnetic component 42 along the second direction Y is not limited, and the change in the magnetic field strength of the detection magnetic component 42 can be detected when the magnetic sensor 41 moves relative to the detection magnetic component 42 along the first direction X. In addition, the position of the magnetic sensor 41 in the first direction X is not limited. For example, it can be set at a position in the housing 3 corresponding to the middle position of the second magnetic component 44, or at a position in the housing 3 corresponding to the middle position of the first magnetic component 43, or at a position in the housing 3 corresponding to the junction of the second magnetic component 44 and the third magnetic component 45. In one embodiment, as Fig.15b As shown, when the first lens mounting seat 6 is located at a middle position within the travel range relative to the housing 3 in the first direction X, the magnetic sensor 41 is located at a position in the housing in the first direction X corresponding to the middle position of the second magnetic member 44 .

[0143] The orthographic projection of the magnetic sensor 41 along the second direction Y may completely overlap with the detection magnetic component 42, partially overlap, or not overlap, which can be specifically designed according to the requirements. Fig.15b As shown, in one embodiment, the orthographic projection of the magnetic sensor 41 along the second direction Y may completely overlap with the magnetic sensor 41 .

[0144] It should be noted that each magnetic member in the detection magnetic assembly 42 can be composed of one or more sub-magnetic members. And the number of sub-magnetic members in each magnetic member of the detection magnetic assembly 42 can be equal or unequal. In one embodiment, Fig.17b As shown, each magnetic component in the detection magnetic assembly 42 is an integrated magnetic component. Or it can be understood that each magnetic component is composed of a sub-magnetic component. In another embodiment, as Fig.18 As shown, each magnetic member in the detection magnetic assembly 42 is composed of two sub-magnetic members. In another embodiment, the first magnetic member 43 and the second magnetic member 44 are each composed of two sub-magnetic members, and the third magnetic member 45 is composed of three sub-magnetic members.

[0145] like Fig.17a and Fig.19As shown, the distance between the positions corresponding to the peak values ​​of the magnetic field intensity is greater than the size of the second magnetic member 44 in the first direction X, or it can be understood that the effective detection stroke of the displacement detection device 4 is greater than the size of the second magnetic member 44 in the first direction X, and as the size of the second magnetic member 44 in the first direction X increases, the effective detection stroke of the displacement detection device 4 increases accordingly.

[0146] Specifically, Fig. 20 As shown, as the size of the second magnetic member 44 increases, the distance between the positions corresponding to the peak values ​​of the magnetic field intensity increases, and the effective detection stroke of the displacement detection device 4 increases. When the size of the second magnetic member 44 in the first direction X is 4.8 mm, the effective detection stroke of the displacement detection device 4 can reach ±2.8 mm (as shown in curve S10). If the size of the second magnetic member 44 is further increased, the effective detection stroke of the displacement detection device 4 can be further increased, up to ±3 mm or more. Or it can be understood that the effective detection stroke of the displacement detection device 4 can reach more than 6 mm. However, when the size of the second magnetic member 44 is greater than 5 mm (not shown in the figure), the distance between the positions corresponding to the peak values ​​of the magnetic field intensity does not increase significantly. Therefore, the reasonable range of the size of the second magnetic member 44 in the first direction X can be 0.4 mm-5 mm. In the limited space of the lens focusing assembly 2, the effective detection stroke of the displacement detection device 4 is effectively improved. It can be understood by those skilled in the art that the size of the second magnetic member 44 in the first direction X can also be set to be less than 0.4 mm, or greater than 5 mm, and the present application does not limit this.

[0147] It should be noted that when the detection magnetic component 42 is reused as the driving magnetic component 52, the Lorentz force generated by the detection magnetic component 42 and the coil 51 is used as the driving force to drive the first lens mount 6 to move. The size of each magnetic component in the detection magnetic component 42 and the arrangement of the magnetic pole direction have a crucial influence on the size of the driving force. After meeting the design requirements of the effective detection stroke of the lens focusing component 2 and confirming the size of the second magnetic component 44 and the magnetic pole direction of each magnetic component, the size of the first magnetic component 43 and the third magnetic component 45 can be designed according to the driving force required to drive the first lens mount 6 to move. In addition, when the first lens mount 6 moves to the limit stroke, the magnetic sensor 41 should have a good magnetic field matching area with the coil 51, so that the generated Lorentz force is sufficient to drive the first lens mount 6 back to the initial position.

[0148] The sizes of the first magnetic member 43 and the third magnetic member 45 in the first direction X may be equal or unequal. The specific design may be based on actual needs. Fig.21 As shown, the first magnetic member 43 and the third magnetic member 45 have different sizes in the first direction X. In another embodiment, as shown in FIG. Fig.19 As shown, the first magnetic member 43 and the third magnetic member 45 have the same size in the first direction X. This makes the first magnetic member 43 and the third magnetic member 45 more interchangeable, facilitates the production of the lens focusing assembly 2 and reduces costs.

[0149] It should be noted that if Fig.15b As shown, the arrangement of the magnetic poles of each magnetic component in the detection magnetic component 42 can not only increase the distance between the positions corresponding to the peak values ​​of the magnetic field intensity, but also increase the magnetic field intensity on the side close to the housing 3 and weaken the magnetic field intensity on the side away from the housing 3. Therefore, when the detection magnetic component 42 is reused as the driving magnetic component 52, when the same driving force is required, the size of the first magnetic component 43 and the third magnetic component 45 in the first direction X can be designed to be smaller, thereby reducing the size of the lens focusing component 2, and then reducing the size of the camera module 1, making the electronic device 100 more compact.

[0150] Furthermore, if Fig.15b As shown, the material of each magnetic component in the detection magnetic assembly 42 is not limited. For example, it can be a material such as a magnet, a magnet, etc. Moreover, the material of each magnetic component can be the same or different. In one example, each magnetic component is a magnet. In another example, each magnetic component is a magnet. In yet another example, the first magnetic component 43 and the third magnetic component 45 are magnets, and the second magnetic component 44 is a magnet. The raw materials for the production of the magnetic components are relatively common, and the production cost is low.

[0151] The above is a detailed description of the displacement detection method of the lens focusing assembly 2 in conjunction with the accompanying drawings. The following is a detailed description of the correction method when the first lens mounting seat 6 is offset in conjunction with the accompanying drawings.

[0152] See also Figure 22 to Figure 26b , Fig. 22 Schematic diagram of the arrangement of the displacement detection device in the lens focusing assembly of the embodiment of the present application, wherein the lens focusing assembly includes two displacement detection devices; Fig.23 It is a schematic diagram of the arrangement of the displacement detection device in the lens focusing assembly of the embodiment of the present application, wherein the displacement detection device is offset along the second direction; Fig.24 It is a stroke-magnetic field intensity variation curve when the displacement detection device in the lens focusing assembly of the embodiment of the present application is displaced along the second direction; Fig.25 A correction curve of travel-magnetic field strength when the displacement detection device in the lens focusing assembly of the embodiment of the present application is displaced along the second direction; Fig.26a It is a schematic diagram of the arrangement of the displacement detection device in the lens focusing assembly of the embodiment of the present application, wherein one detection magnetic assembly is reused as a driving magnetic assembly, and the other detection magnetic assembly is not reused as a driving magnetic assembly; Figure 26bIt is a schematic diagram of the arrangement of the displacement detection device in the lens focusing assembly of the embodiment of the present application, wherein only a part of the driving magnetic assembly is reused from the detection magnetic assembly.

[0153] It should be noted that if Fig. 22 and Fig.23 As shown, when the electronic device is affected by external factors, the first lens mounting seat 6 in the lens focusing assembly 2 may be offset along the second direction Y. When the relative distance between the magnetic sensor 41 and the detection magnetic assembly 42 changes (for example, the relative distance between the magnetic sensor 41 and the detection magnetic assembly 42 changes from Y1 to Y2), the magnetic field strength detected by the magnetic sensor 41 also changes. Specifically, Fig.24 As shown, when the distance between the detection magnetic component 42 and the magnetic sensor 41 increases, the magnetic field strength detected by the magnetic sensor 41 decreases (as shown in S13). When the distance between the first lens mounting seat 6 and the magnetic sensor 41 decreases, the magnetic field strength detected by the magnetic sensor 41 increases (as shown in S11). Errors in the magnetic field strength detected by the magnetic sensor 41 will further reduce the detection accuracy of the displacement detection device 4.

[0154] Exemplarily, when the relative distance between the magnetic sensor 41 and the detection magnetic component 42 increases, when the first lens mount 6 moves to the predetermined position, the magnetic field strength detected by the magnetic sensor 41 decreases, and the processor 109 adjusts the movement distance of the first lens mount 6 according to the current magnetic field strength detected by the magnetic sensor 41, so that the magnetic field strength detected by the magnetic sensor 41 is the same as the magnetic field strength corresponding to the preset position. However, after such adjustment, the actual position of the first lens mount 6 will deviate from the predetermined position. Therefore, when the relative distance between the magnetic sensor 41 and the detection magnetic component 42 changes, it will cause accuracy errors, and the magnetic field strength detected by the magnetic sensor 41 is inaccurate, thereby reducing the position detection accuracy.

[0155] In one embodiment, if Fig. 22 As shown, there are two displacement detection devices 4, and the two displacement detection devices 4 are respectively arranged on both sides of the first lens mounting seat 6 along the second direction Y and the housing 3 (see Fig.15b ). The first lens mounting seat 6 is provided with a displacement detection device 4 on both sides along the second direction Y. This can effectively avoid the adverse effect on the position detection accuracy when the first lens mounting seat 6 is offset relative to the housing 3 along the second direction Y, thereby avoiding the adverse effect on the focus / zoom effect of the lens focusing assembly 2.

[0156] like Fig.25As shown, when the first lens mounting seat 6 is offset along the second direction Y, so that the relative distance between each magnetic sensor 41 and the corresponding detection magnetic assembly 42 changes from Y1 to Y2. The magnetic field strength detected by the magnetic sensor 41 on the upper side along the second direction Y decreases (as shown in S15), and the magnetic field strength detected by the magnetic sensor 41 on the lower side along the second direction Y increases (as shown in S14). Since the spacing of the magnetic sensors 41 on both sides in the second direction Y remains unchanged, compared with the magnetic field strength detected when not offset downward, the increased portion of the magnetic field strength detected by the magnetic sensor 41 on the lower side after the offset is just approximately equal to the decreased portion of the magnetic field strength detected by the magnetic sensor 41 on the upper side after the offset. Therefore, by performing corresponding calculations on the magnetic field strength detected by the upper magnetic sensor 41 and the magnetic field strength detected by the lower magnetic sensor 41, it can be ensured that under the same stroke, the magnetic field magnitude values ​​detected by the two magnetic sensors 41 (as shown in S16) are basically not affected by the change in the spacing between the magnetic sensor 41 and the corresponding detection magnetic assembly 42, which helps to reduce the accuracy error and improve the position detection accuracy.

[0157] Furthermore, the two displacement detection devices 4 can be arranged in any manner, and can be arranged symmetrically or asymmetrically. Fig. 22 As shown, the two displacement detection devices 4 are symmetrically arranged. When the first lens mounting seat 6 is offset relative to the housing 3 in the second direction Y, it is more convenient to perform fitting calculation on the sensing signal, thereby reducing the calculation burden of the controller.

[0158] Furthermore, the structures of the detection magnetic components 42 in the two displacement detection devices 4 may be the same or different. Fig. 22 As shown, the structures of the detection magnetic components 42 in the two displacement detection devices 4 are the same. In another embodiment, the first magnetic member 43 and the third magnetic member 45 of the detection magnetic component 42 in one displacement detection device 4 have the same size in the first direction X, and the first magnetic member 43 and the third magnetic member 45 of the detection magnetic component 42 in the other displacement detection device 4 have different sizes in the first direction X.

[0159] It should be noted that the type of the magnetic sensor 41 in the displacement detection device 4 is not limited, and it can be a Hall sensor, anisotropic magnetoresistive (AMR) sensor, tunnel magnetoresistive (TMR) sensor, etc. In addition, the types of the magnetic sensors 41 in the two displacement detection devices 4 can be the same or different. In one example, the magnetic sensors 41 in the two displacement detection devices 4 are both Hall sensors. All the magnetic sensors 41 in the displacement detection device 4 are of the same type, which helps to reduce the difficulty of adaptation and assembly of the displacement detection device 4, and can reduce the manufacturing cost.

[0160] It should be further explained that the detection magnetic components 42 in all displacement detection devices 4 can be partially reused as the driving magnetic components 52 (for example, Fig.26a As shown, one detection magnetic component 42 is multiplexed as the driving magnetic component 52, and the other detection magnetic component 42 is not multiplexed as the driving magnetic component), or all of them can be multiplexed as the driving magnetic component 52 (for example, as Fig. 22 As shown, the detection magnetic components 42 in the two displacement detection devices 4 are reused as the driving magnetic components 52 of the two driving devices respectively).

[0161] In addition, the driving magnetic components 52 of all the driving devices 5 can all be reused from the detection magnetic components 42 (eg Fig. 22 As shown), it can also be only partially reused from the detection magnetic component 42 (as shown Figure 26b In the case where only a portion of the driving magnetic components 52 of all the driving devices 5 are reused from the detection magnetic components 42, the structure of the separately provided driving magnetic components 52 may adopt the structure of the detection magnetic components 42 described above (such as Figure 26b Other structures may also be used.

[0162] The correction method for the offset of the first lens mounting seat 6 is described in detail above in conjunction with the accompanying drawings, and the structural composition of the lens focusing assembly 2 is described in detail below in conjunction with an exemplary structure.

[0163] See also Figures 27 to 33 , Fig. 27 A schematic diagram of a three-dimensional structure of an exemplary structure of a lens focusing assembly according to an embodiment of the present application; Fig.28 Schematic diagram of the three-dimensional structure of the lens focusing assembly of the embodiment of the present application, wherein the upper shell of the lens focusing assembly is not shown; Fig.29 This is a schematic diagram of the three-dimensional structure of the lens focusing assembly according to an embodiment of the present application, wherein the housing of the lens focusing assembly is not shown; Fig.30 This is a schematic diagram of the exploded structure of another lens focusing assembly according to an embodiment of the present application, wherein the housing of the lens focusing assembly is not shown; Fig.31 for Fig.29 A schematic cross-sectional view in the middle BB direction, wherein the guide rail is not shown; Fig.32 It is a schematic cross-sectional structure diagram of the magnetic components of the detection magnetic assembly in the lens focusing assembly of the embodiment of the present application when they are arranged at intervals, wherein the housing of the lens focusing assembly is not shown; Fig.33 This is a schematic diagram of the three-dimensional structure of another lens focusing assembly according to an embodiment of the present application, wherein the upper shell of the lens focusing assembly is not shown; Fig.34 This is a schematic diagram of a three-dimensional structure of another lens focusing assembly according to an embodiment of the present application, wherein the housing of the lens focusing assembly is not shown; Fig.35This is a schematic diagram of the three-dimensional structure of another lens focusing assembly according to an embodiment of the present application, wherein the housing, coil and other structures of the lens focusing assembly are not shown.

[0164] like Figure 27 to Figure 28 As shown, the specific structure of the housing 3 is not limited. In one example, the housing 2 includes an upper housing 31 and a lower housing 32, and the upper housing 31 and the lower housing 32 are buckled and fixed to each other. The first lens mounting seat 6 is provided with a mounting hole 62, and the mounting hole 62 passes through the first lens mounting seat 6 along the first direction X. The first end of the mounting hole 62 extends to the first end surface of the first lens mounting seat 6, and the second end of the mounting hole 62 extends to the second end surface of the first lens mounting seat 6. The first lens group 16 is installed in the mounting hole 62.

[0165] It should be noted that the shapes of the housing 3 and the first lens mounting seat 6 are not limited and may be rectangular, circular, etc. In one example, Fig. 27 and Fig.28 As shown, the housing 3 and the first lens mounting seat 6 are both configured as rectangles. The length direction of the housing 3 and the first lens mounting seat 6 can be understood as the first direction X, the width direction can be understood as the second direction Y, and the height direction is perpendicular to the first direction X and the second direction Y.

[0166] Among them, Fig.29 As shown, the installation method of the detection magnetic component 42 and the first lens mounting seat 6 is not limited, and it can be directly installed on the surface of the first lens mounting seat 6, or embedded in the first groove 61 opened on the surface of the first lens mounting seat 6. In one embodiment, the first lens mounting seat 6 opens the first groove 61 on the side surface along the second direction Y, and the detection magnetic component 42 is embedded in the first groove 61 of the first lens mounting seat 6.

[0167] like Fig.29 As shown, the lens focusing assembly 2 also includes a magnetic shielding sheet 21. The magnetic shielding sheet 21 is disposed between the magnetic assembly (for example, it can be a detection magnetic assembly 42 or a driving magnetic assembly 52) and the first lens mounting seat 6 along the second direction Y. Specifically, one side of the magnetic shielding sheet 21 along the second direction Y is connected to the bottom surface of the first groove 61, and the other side is connected to the surface of the magnetic assembly close to the first lens mounting seat 6. The magnetic shielding sheet 21 is used to isolate the magnetic field interference between the magnetic assembly installed on the other side of the first lens mounting seat 6, so as to ensure the detection accuracy of the displacement detection device and the displacement accuracy when the driving device drives the first lens mounting seat 6 to move.

[0168] And, if Fig.28 and Fig.29As shown, the lens focusing assembly also includes a circuit board 22, and the type of the circuit board 22 is not limited, for example, it can be a flexible circuit board or a PCB board. Exemplarily, the circuit board 22 is a flexible circuit board. Further, the position of the circuit board 22 is not limited, and it can be fixedly connected to the upper shell, or fixedly connected to the lower shell 32. In one example, the circuit board 22 is fixedly connected to the lower shell 32, and is used for the transmission of electrical signals of the lens focusing assembly, sending a signal to the coil 51 to drive the first lens mount 6 to move along the first direction X, and transmitting electrical signals with the magnetic sensor 41, so as to detect the position of the first lens mount 6.

[0169] It should be noted that the coil 51 and the magnetic sensor 41 are integrated on the circuit board 22 and are connected to the controller 11 through the circuit board 22. Furthermore, the circuit board 22 is fixedly connected to the lower shell 32, so that the coil 51 and the magnetic sensor 41 are fixed relative to the lower shell 32.

[0170] like Fig.28 and Fig.29 As shown, the lens focusing assembly further includes a guide device 8. The first lens mounting seat 6 is slidably connected to the housing along the first direction X through the guide device 8, and the specific structure of the guide device 8 is not limited. In one embodiment, as Fig.28 and Fig.29 As shown, the guide device 8 includes a guide rail 81, which extends along the first direction X and is fixedly connected to the housing. A second groove 63 is provided on the bottom surface of the first lens mounting seat 6 near the guide rail 81 and passes through the first direction X. The first lens mounting seat 6 and the housing are slidably connected through the cooperation of the second groove 63 and the guide rail 81.

[0171] Furthermore, the number of guide devices 8 between the first lens mount 6 and the housing is not limited, and can be one or more. Exemplarily, the first lens mount 6 is slidably connected to the housing via two guide devices 8. The shape of the second groove 63 on the bottom surface of the first lens mount 6 is not limited. For example, it can be an arc, a rectangle, a V-shape, a trapezoid, and the like. Moreover, the shapes of the second groove 63 on the bottom surface of the first lens mount 6 can be the same or different. In one example, two second grooves 63 are provided on the bottom surface of the first lens mount 6, one second groove 63 is in the shape of a rectangle, and the other second groove 63 is in the shape of a trapezoid.

[0172] The material of the guide rail 81 is not limited, and can be a non-magnetic material or a strong magnetic material. In one example, the guide rail 81 is made of a strong magnetic material. The guide rail 81 of the strong magnetic material can be pre-stressed with the magnet assembly by magnetic attraction to prevent the first lens mounting seat 6 from derailing.

[0173] In another embodiment, Fig.30As shown, a second groove 63 is provided on the bottom surface of the first lens mounting seat 6, and a third groove 33 is provided on the surface of the lower shell 32 close to the bottom surface of the first lens mounting seat 6 at a position corresponding to the second groove 63. The first lens mounting seat 6 and the outer shell are slidably connected along the first direction X through the balls 82 accommodated in the second groove 63 and the third groove 33.

[0174] like Fig.31 and 32 As shown, the magnetic components of the detection magnetic assembly 42 (for example, between the first magnetic component 43 and the second magnetic component 44, between the second magnetic component 44 and the third magnetic component 45) can be arranged in contact with each other in the first direction X, or can be arranged at intervals. Fig.31 As shown, the magnetic parts of the detection magnetic assembly 42 (for example, between the first magnetic part 43 and the second magnetic part 44, and between the second magnetic part 44 and the third magnetic part 45) are arranged in contact in the first direction X. It should be noted that, due to the limitations of the current assembly process, there will be a certain gap between the magnetic parts of the detection magnetic assembly 42 when they are arranged in contact along the first direction X. Of course, if it can be achieved in terms of technology, the magnetic parts of the detection magnetic assembly 42 can be in close contact with each other in the first direction X without any gap, and this application does not limit this.

[0175] In another embodiment, Fig.32 As shown, the magnetic parts of the detection magnetic component 42 (for example, between the first magnetic part 43 and the second magnetic part 44, and between the second magnetic part 44 and the third magnetic part 45) are spaced apart in the first direction X. In addition, the space between the magnetic parts can be filled with a non-magnetic gas (for example, air) or a non-magnetic component 23 (the non-magnetic component 23 is not adsorbed with the magnetic parts, that is, no magnetic attraction is generated). The specific material of the non-magnetic component 23 is not limited, and can be a non-magnetic metal or non-metal material. Those skilled in the art can choose according to the specific situation. In one example, the non-magnetic component 23 can be made of metal materials such as aluminum and copper. In another example, the non-magnetic component 23 can be made of non-metallic materials such as plastic. Among them, the spacing distance between the magnetic parts spaced apart in the detection magnetic component 42 is not limited. Those skilled in the art can design according to the actual situation.

[0176] Furthermore, the non-magnetic conductive component 23 and the first lens mounting seat 6 may be an integrated structure or a split structure. Fig.32As shown, the non-magnetic component 23 and the first lens mounting seat 6 are a split structure. In another embodiment, the non-magnetic component 23 and the first lens mounting seat 6 are an integrated structure. Or it can be understood that the first groove 61 opened on the surface of the first lens mounting seat 6 can include a plurality of sub-grooves, and each magnetic component of the detection magnetic assembly 42 is arranged in the corresponding sub-grooves, and the material of the first lens mounting seat 6 is a non-magnetic material.

[0177] like Fig.33 As shown, the overall structure formed by the first lens mounting seat 6 and other structural parts fixed to the first lens mounting seat 6 can be understood as a moving part, and the moving part moves quantitatively along the first direction X to achieve focusing or zooming. It should be noted that the number of moving parts in the lens focusing assembly is not limited. In addition to the above-mentioned moving parts, other moving parts (whose structures can be the same as or different from the above-mentioned moving parts) can also be additionally provided, or other moving parts can be not additionally provided. In one embodiment, as Fig.28 As shown, the lens focusing assembly 2 only includes the above-mentioned one moving part (ie, the first lens mounting seat 6 and the integral structure consisting of other structural parts fixed to the first lens mounting seat 6).

[0178] In another embodiment, Fig.34 As shown, two moving parts are arranged in the lens focusing assembly 2. Specifically, the lens focusing assembly includes a second lens mounting seat 7 in addition to the overall structure consisting of a first lens mounting seat 6 and other structural parts fixed to the first lens mounting seat 6. The lens 15 also includes a second lens group 17, and the second lens group 17 is mounted on the second lens mounting seat 7. The second lens mounting seat 7 is slidably connected in the housing along the first direction X, and is arranged opposite to the first lens mounting seat 6 in the first direction X. The second lens mounting seat 7 is arranged opposite to the first lens mounting seat 6 along the first direction X, and the focusing or zooming function of the lens focusing assembly can be better realized by adjusting the distance between the first lens group 16 and the second lens group 17.

[0179] It should be noted that the displacement detection device 4 used to detect the position of the first lens mount 6 and the displacement detection device used to detect the position of the second lens mount 7 may be the same or different. In one embodiment, the displacement detection device 4 for detecting the position of the first lens mount 6 and the displacement detection device for detecting the position of the second lens mount 7 both use a magnetic sensor 41 plus three magnetic components provided in the present application to perform position detection.

[0180] In another embodiment, Fig.35As shown, the displacement detection device 4 for detecting the position of the first lens mounting seat 6 adopts the method of one magnetic sensor 41 plus three magnetic parts provided in the present application to perform position detection, and the displacement detection device for detecting the position of the second lens mounting seat 7 adopts the method of one magnetic sensor plus two magnetic parts shown in the prior art to perform position detection.

[0181] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and modifications.

Claims

1. A lens focusing assembly, characterized in that: include: A first lens mounting seat (6), the first lens mounting seat (6) being used to mount a first lens group (16) of a lens (15); A housing (3), wherein the first lens mounting seat (6) is slidably connected in the housing (3) along a first direction (X); A displacement detection device (4), the displacement detection device (4) comprising a detection magnetic component (42) and a magnetic sensor (41), the detection magnetic component (42) being fixedly arranged on the first lens mounting seat (6), and the magnetic sensor (41) being fixedly arranged on the housing (3) at a position corresponding to the detection magnetic component (42); The detection magnetic component (42) comprises a first magnetic component (43), a second magnetic component (44) and a third magnetic component (45) which are arranged in sequence in the first direction (X); the magnetic pole polarities of each magnetic component in the first magnetic component (43) and the third magnetic component (45) on both sides along the second direction (Y) are opposite; the magnetic pole polarities of the second magnetic component (44) on both sides along the first direction (X) are opposite; the magnetic pole polarity of the first magnetic component (43) on the side facing the housing (3) is the same as the magnetic pole polarity of the second magnetic component (44) on the side close to the first magnetic component (43); the magnetic pole polarity of the third magnetic component (45) on the side facing the housing (3) is the same as the magnetic pole polarity of the second magnetic component (44) on the side close to the third magnetic component (45); wherein the first direction (X) is the optical axis direction of the first lens group (16), and the second direction (Y) is perpendicular to the first direction (X).

2. The lens focusing assembly according to claim 1, characterized in that: There are two displacement detection devices (4), and the two displacement detection devices (4) are respectively arranged between two sides of the first lens mounting seat (6) along the second direction (Y) and the corresponding sides of the housing (3).

3. The lens focusing assembly according to claim 2, characterized in that: The two displacement detection devices (4) are symmetrically arranged.

4. The lens focusing assembly according to claim 1, characterized in that: The lens focusing assembly (2) also includes a driving device (5), the driving device (5) is used to drive the first lens mounting seat (6) to slide along the first direction (X) relative to the housing (3), and includes a driving magnetic component (52) and a coil (51), the driving magnetic component (52) is fixedly arranged on the first lens mounting seat (6), and the coil (51) is fixedly arranged at a position of the housing (3) corresponding to the driving magnetic component (52); the detection magnetic component (42) is reused as the driving magnetic component (52).

5. The lens focusing assembly according to claim 1, wherein: The size of the second magnetic member (44) in the first direction (X) is 0.4 mm-5 mm.

6. The lens focusing assembly according to claim 1, wherein: The first magnetic component (43) and the third magnetic component (45) have the same size in the first direction (X).

7. The lens focusing assembly according to claim 1, wherein: The detection direction of the magnetic sensor (41) is the second direction (Y).

8. The lens focusing assembly according to claim 1, wherein: The lens focusing assembly (2) further comprises a second lens (15) mounting seat, the second lens (15) mounting seat being used for a second lens group of the lens (15), the second lens (15) mounting seat being slidably connected in the housing (3) along the first direction (X), and being arranged opposite to the first lens mounting seat (6) in the first direction (X).

9. The lens focusing assembly according to any one of claims 1 to 8, characterized in that: Each of the magnetic parts is a magnet or a magnet.

10. A camera module, characterized in that: The invention comprises a lens (15) and a lens focusing assembly (2) as claimed in any one of claims 1 to 9, wherein the lens (15) comprises a first lens group (16), and the first lens group (16) is mounted on the first lens mounting seat (6) of the lens focusing assembly (2).

11. The camera module according to claim 10, wherein: The camera module (1) further comprises a front prism (13) and an image sensor (14); the front prism (13) is arranged in front of the first lens group (16) along the light incident direction, and the image sensor (14) is arranged in the rear of the first lens group (16) along the light incident direction.

12. An electronic device, characterized in that: It comprises a housing (102) and a camera module (1) as claimed in claim 10 or 11, wherein the camera module (1) is installed in the housing (102).

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