CN222395753U

CN222395753U - Lens focusing components, camera modules and electronic equipment

Info

Publication number: CN222395753U
Application number: CN202420749199.7U
Authority: CN
Inventors: 丁肇元; 刘彬; 杨智涛; 黄昌福
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2024-04-11
Filing date: 2024-04-11
Publication date: 2025-01-24
Anticipated expiration: 2034-04-11

Abstract

The application 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 mode of adding three magnetic pieces (detection magnetic components) to a magnetic sensor to detect the position. The polarities of the two magnetic poles of each of the first magnetic piece and the third magnetic piece along the second direction are opposite, and the polarities of the two magnetic poles of the second magnetic piece along the first direction are opposite. And the polarities of the second magnetic piece close to the first magnetic piece and the third magnetic piece are respectively the same as the polarities of the magnetic poles of the first magnetic piece and the third magnetic piece facing to one side of the shell. The magnetic sensor fixedly arranged on the shell is far away from the second magnetic part relative to the position of the corresponding magnetic field intensity peak value when the magnetic sensor is fixedly arranged on the first lens mounting seat and horizontally moves, so that the effective detection stroke of the displacement detection device is effectively increased, and the cost is reduced.

Description

Lens focusing assembly, camera module and electronic equipment

Technical Field

The present application relates to the field of terminals, and in particular, to a lens focusing assembly, a camera module, and an electronic device.

Background

In recent years, as technology of electronic devices is updated faster and faster, requirements of users on imaging quality of camera modules are also higher and higher. In order to improve the imaging quality of the camera modules, more and more camera modules of electronic devices are configured with an anti-shake function and an automatic zooming function. In order to compensate for the shake effect and realize the auto-zoom function, it is necessary to perform position feedback using a sensor having a long-stroke, high-precision position detection function.

In the prior art, a displacement detection device of a lens focusing assembly in a camera module generally realizes position detection through mutual matching between a magnetic sensor and a magnetic assembly. The magnetic component comprises two magnetic pieces, wherein the two magnetic pieces are adjacently and fixedly arranged on a moving piece (namely a lens mounting seat for mounting a lens group, also called a rotor) of the lens focusing component along a first direction (the first direction is the optical axis direction), and the magnetic poles on the same side are opposite in direction, and the magnetic sensor is fixedly arranged on a fixed piece (namely a shell, also called a stator) of the lens focusing component and is correspondingly arranged with the magnetic component. When the magnetic component moves along the first direction along with the moving part of the lens focusing component relative to the fixed part, the relative position of the magnetic sensor and the magnetic component changes, the magnetic field intensity detected by the magnetic sensor changes, and the controller (for example, a chip) determines the real-time position of the moving part according to the received magnetic field intensity changes, so that the driving device of the lens focusing component is controlled to drive the moving part to move to the target position according to the real-time position. However, in the moving process of the moving member, the current position of the moving member can be accurately confirmed only when the magnetic field intensities detected by the magnetic sensors are different when the moving member moves to each position. The two magnetic pieces are different in magnetic field intensity within a certain size range (along the first direction) around the joint, wherein the size range is the distance between positions corresponding to the peaks of the detected magnetic field intensity when the magnetic sensor translates relative to the magnetic component along the first direction. Thus, the effective detection stroke of the magnetic sensor is understood to be the distance between the positions corresponding to the magnetic field intensity peaks around the junction of the two magnetic pieces.

In an exemplary scenario, the displacement detection device of the lens focusing assembly performs position detection by adopting a mode of adding two magnetic pieces to one sensor, but in the mode, the distance between positions corresponding to magnetic field intensity peaks around the joint of the two magnetic pieces is within 1mm, namely the effective detection stroke of the magnetic sensor is within 1mm, and the effective detection stroke is shorter. In another exemplary scenario, the displacement detection device of the lens focusing assembly performs position detection by adopting a mode of adding two or three sensors and two magnetic pieces, and the effective detection stroke of each sensor is obtained after appropriate comprehensive calculation, and the total effective detection stroke is improved compared with the case of a single sensor, but at most reaches 2mm and cannot be further improved. However, the multiple sensors can increase the cost of the lens focusing assembly, and more magnetic field signal collecting channels are needed, so that the operation load of the controller is increased, the technical capability requirement on the controller is high, and the applicability is limited.

Therefore, the displacement detection device of the lens focusing assembly in the prior art has small effective detection stroke, and the scheme of adopting a plurality of sensors has high detection cost, high requirements on the technical capability of the controller and relatively limited applicability.

Disclosure of utility model

The application provides a lens focusing assembly, a camera module and electronic equipment, which solve the problems that in the prior art, the effective detection stroke of a displacement detection device of the lens focusing assembly is small, the detection cost is high by adopting a scheme of a plurality of sensors, the technical capability requirement on a controller is high, and the applicability is limited.

The embodiment of the application provides a lens focusing assembly, which comprises a first lens mounting seat, a shell and a displacement detection device. The first lens mounting seat is used for mounting a first lens group of the lens and is connected in the shell in a sliding manner along a first direction.

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

The magnetic component comprises a first magnetic part, a second magnetic part and a third magnetic part which are sequentially arranged in the first direction, the magnetic poles of each magnetic part in the first magnetic part and the third magnetic part are opposite in polarity along the two sides of the second direction, the magnetic poles of each second magnetic part in the first direction are opposite in polarity, the magnetic poles of one side of the first magnetic part, which faces the shell, are identical to the magnetic poles of one side of the second magnetic part, which is close to the first magnetic part, and the magnetic poles of one side of the third magnetic part, which faces the shell, are identical to the magnetic poles of the second magnetic part, which is close to the third magnetic part. The first direction is the optical axis direction of the first lens group, and the second direction is perpendicular to the first direction.

The displacement detection device of the lens focusing assembly adopts a mode of a magnetic sensor and three magnetic pieces to detect the position. Specifically, the polarities of the two sides of each of the first magnetic element and the third magnetic element along the second direction are opposite, the polarities of the two sides of the second magnetic element along the first direction are opposite (or it can be understood that the first magnetic element and the third magnetic element magnetize along the second direction, the second magnetic element magnetizes along the first direction, and the magnetizing direction of the second magnetic element is perpendicular to the magnetizing directions of the first magnetic element and the third magnetic element). And the polarities of the second magnetic piece close to the first magnetic piece and the third magnetic piece are respectively the same as the polarities of the magnetic poles of the first magnetic piece and the third magnetic piece facing to one side of the shell. When the magnetic sensor translates relative to the detection magnet assembly along the first direction, the translation position corresponding to the detected peak value of the magnetic field intensity is far away from the second magnetic element (or it can be understood that the distance between the translation positions corresponding to the detected peak value of the magnetic field intensity is increased), so that the effective detection stroke of the magnetic sensor is greatly increased (for example, the effective detection stroke can reach more than 2mm, even more than 6 mm). In addition, in the displacement detection device of the embodiment, only one magnetic sensor is used, compared with a mode of two or three sensors, the cost of the lens focusing assembly is effectively reduced, and the technical capability requirement on a controller (for example, a chip) is low, so that the applicability is wider.

Therefore, the lens focusing assembly provided by the embodiment of the application only needs to adopt a mode of one magnetic sensor and three magnetic pieces to detect the position, and the magnetic pole polarity distribution of the three magnetic pieces in the detection magnetic assembly is arranged, so that when the magnetic sensor translates relatively to the detection magnetic assembly, the position of the corresponding magnetic field intensity peak value is far away from the second magnetic piece, and the effective detection stroke of the displacement detection device is effectively increased. And only one magnetic sensor is adopted, so that the cost of the lens focusing assembly is reduced, the technical capability requirement on the controller is low, and the applicability is wider. Therefore, the problems that in the prior art, the effective detection stroke of a displacement detection device of a lens focusing assembly is small, the detection cost is high by adopting a scheme of a plurality of sensors, the technical capability requirement on a controller is high, and the applicability is limited are solved.

In some embodiments, the two displacement detecting devices are respectively disposed between two sides of the first lens mount along the second direction and corresponding sides of the housing.

By adopting the scheme, the two sides of the first lens mounting seat along the second direction are provided with the displacement detection devices. The adverse effect on the position detection precision when the first lens mounting seat is offset relative to the shell along the second direction can be effectively avoided, and further the adverse effect on the focusing/zooming effect of the lens focusing assembly is avoided.

In some embodiments, the two displacement detection devices are symmetrically disposed. Through the design, when the first lens mounting seat is offset relative to the shell in the second direction, fitting calculation of the sensing signals is facilitated, and the operation load of the controller is reduced.

In some embodiments, the lens focusing assembly further includes a driving device, where the driving device is used to drive the first lens mount to slide along the first direction relative to the housing, and includes a driving magnetic assembly and a coil, the driving magnetic assembly is fixedly disposed on the first lens mount, and the coil is fixedly disposed at a position of the housing corresponding to the driving magnetic assembly. The detection magnetic assembly is multiplexed into the drive magnetic assembly.

Through such design, detect magnetic component multiplexing and be the drive magnetic component, reduced the volume of camera lens subassembly of focusing, be favorable to electronic equipment's miniaturization. And is beneficial to reducing the production cost of the lens focusing assembly.

In some embodiments, the second magnetic member has a dimension in the first direction of 0.4mm to 5mm. Through the design, the effective detection stroke of the displacement detection device is effectively improved in the limited space of the lens focusing assembly.

In some embodiments, the first magnetic member and the third magnetic member are equal in size in the first direction. By adopting the scheme, the interchangeability of the first magnetic part and the third magnetic part is better, so that the lens focusing assembly is convenient to produce and manufacture and the cost is reduced.

In some embodiments, the detection direction of the magnetic sensor is a second direction.

In some embodiments, the lens focusing assembly further includes a second lens mount for a second lens group of the lens, the second lens mount being slidably coupled within the housing along the first direction and disposed opposite the first lens mount in the first direction.

Through such design, the second lens mount pad sets up along first direction with first lens mount pad is relative, can realize the focusing or the function of zooming of lens focusing assembly better through adjusting the distance between first lens group and the second lens group.

In some embodiments, each magnetic member is a magnet or a magnet. The magnetic piece is common in production raw materials and low in production cost.

The embodiment of the application also provides a camera module, which comprises a lens and the lens focusing assembly provided by any embodiment, wherein the lens comprises a first lens group, and the first lens group is arranged on a first lens mounting seat of the lens focusing assembly. The lens focusing assembly provided by any embodiment is adopted in the camera module, so that the camera module can realize long-stroke focusing and zooming functions and simultaneously reduce the production cost.

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

The embodiment of the application also provides electronic equipment, which comprises a shell and the camera module provided by any embodiment, wherein the camera module is arranged on the shell. The camera module provided by any embodiment of the application can realize long-stroke focusing and zooming functions, has better imaging effect when shooting a remote picture, and has lower manufacturing cost.

Drawings

FIG. 1a is a schematic diagram illustrating an arrangement of a displacement detecting device in a first lens focusing assembly;

FIG. 1b is a schematic diagram showing a magnetic field distribution of a magnetic component for detection in a first lens focusing assembly;

FIG. 1c is a schematic diagram showing a magnetic field distribution of a magnetic component in a first lens focusing assembly, wherein the magnetic component has a larger size in a first direction;

FIG. 1d is a schematic diagram illustrating an arrangement of a displacement detecting device in a second lens focusing assembly;

FIG. 1e is a schematic diagram illustrating an arrangement of a displacement detecting device in a third lens focusing assembly;

FIG. 1f is a schematic diagram of an effective detection stroke of a displacement detection device of a second type of lens focusing assembly;

FIG. 2 is a graph showing the variation of the travel-magnetic field intensity of different displacement detecting devices in a lens focusing assembly;

FIG. 3a is a schematic diagram of a front view of an electronic device according to an embodiment of the present application;

FIG. 3b is an exploded view of FIG. 3 a;

FIG. 3c is a schematic cross-sectional view taken along the direction A-A in FIG. 3 a;

fig. 4 is a schematic perspective view of a back view angle of an electronic device according to an embodiment of the present application;

FIG. 5 is a schematic diagram of an exemplary structure of a camera module according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a control principle of an electronic device according to an embodiment of the present application;

Fig. 7 to 15a are schematic diagrams illustrating other exemplary structures of a camera module according to an embodiment of the present application;

FIG. 15b is a schematic diagram of a lens focusing assembly according to an embodiment of the present application;

FIG. 16 is a schematic diagram illustrating a control principle of a camera module according to an embodiment of the present application;

FIG. 17a is a schematic diagram illustrating a magnetic field distribution of a detecting magnetic component in a lens focusing assembly according to an embodiment of the present application;

FIG. 17b is a schematic diagram showing an arrangement of a displacement detecting device in a lens focusing assembly according to an embodiment of the present application, wherein a magnetic pole of the second magnet, which is close to the first magnet, is an N pole;

FIG. 17c is a schematic diagram showing another arrangement of the displacement detecting device in the lens focusing assembly according to the present application, wherein the magnetic pole of the second magnet near the first magnet is S pole;

FIG. 18 is a schematic diagram showing another arrangement of a displacement detecting device in a lens focusing assembly according to an embodiment of the present application, wherein each magnetic element in the detecting magnetic assembly is composed of a plurality of sub-magnetic elements;

FIG. 19 is a schematic diagram showing a magnetic field distribution of another detecting magnetic assembly in a lens focusing assembly according to an embodiment of the present application;

FIG. 20 is a graph showing the variation of the stroke-magnetic field strength of the second magnet with different lengths in the lens focusing assembly according to the embodiment of the present application;

FIG. 21 is a schematic diagram illustrating an arrangement of a further detecting magnetic assembly in a lens focusing assembly according to an embodiment of the present application;

FIG. 22 is a schematic diagram showing an arrangement of displacement detecting devices in a lens focusing assembly according to an embodiment of the present application, wherein the lens focusing assembly includes two displacement detecting devices;

FIG. 23 is a schematic diagram showing an arrangement of a displacement detection device in a lens focusing assembly according to an embodiment of the present application, wherein the displacement detection device is displaced along a second direction;

FIG. 24 is a graph showing the variation of the travel-magnetic field intensity when the displacement detecting device of the lens focusing assembly is displaced along the second direction according to the embodiment of the present application;

FIG. 25 is a graph showing the course-magnetic field strength correction when the displacement detecting device of the lens focusing assembly is displaced along the second direction according to the embodiment of the present application;

FIG. 26a is a schematic diagram showing an arrangement of a displacement detecting device in a lens focusing assembly according to an embodiment of the present application, wherein one detecting magnetic assembly is multiplexed as a driving magnetic assembly, and the other detecting magnetic assembly is not multiplexed as a driving magnetic assembly;

FIG. 26b is a schematic diagram showing an arrangement of the displacement detecting device in the lens focusing assembly according to the embodiment of the present application, wherein only a part of the driving magnetic assembly is multiplexed by the detecting magnetic assembly;

FIG. 27 is a schematic perspective view of an exemplary configuration of a lens focusing assembly according to an embodiment of the present application;

Fig. 28 is a schematic perspective view of a lens focusing assembly according to an embodiment of the present application, wherein an upper case of the lens focusing assembly is not shown;

Fig. 29 is a schematic view of a perspective structure of a lens focusing assembly according to an embodiment of the present application, wherein a housing of the lens focusing assembly is not shown;

FIG. 30 is an exploded view of a lens focusing assembly according to another embodiment of the present application, wherein a housing of the lens focusing assembly is not shown;

FIG. 31 is a schematic cross-sectional view taken in the direction B-B of FIG. 29, wherein the guide rail is not shown;

FIG. 32 is a schematic cross-sectional view of a lens focusing assembly according to an embodiment of the present application, wherein the housing of the lens focusing assembly is not shown;

FIG. 33 is a schematic perspective view of a lens focusing assembly according to another embodiment of the present application, wherein an upper case of the lens focusing assembly is not shown;

FIG. 34 is a schematic perspective view of a lens focusing assembly according to another embodiment of the present application, wherein a housing of the lens focusing assembly is not shown;

Fig. 35 is a schematic perspective view of a lens focusing assembly according to another embodiment of the present application, in which the housing, coil, etc. of the lens focusing assembly are not shown.

Reference numerals illustrate:

Some schemes are as follows:

2', a lens focusing assembly;

4', displacement detection means, 41', magnetic sensor, 42', magnetic assembly, 43', magnetic piece;

9', a moving member;

x', first direction.

The application comprises the following steps:

100. an electronic device;

101. A display screen;

102. The device comprises a shell, a rear cover, 104, a middle frame, 105, a bottom plate, 106 and an outer frame;

108. 109, the processor;

1. the camera comprises a camera module, a controller, 12, a rear prism, 13, a front prism, 14, an image sensor, 15, a lens, 16, a first lens group, 17, a second lens group, 18 and other lens groups;

2. a lens focusing assembly; 21, magnetism isolating sheets, 22, a circuit board, 23, a non-magnetic conductive component;

3. the shell, 31, the upper shell, 32, the lower shell, 33, the third groove;

4. A displacement detection device; 41, a magnetic sensor, 42, a detection magnetic assembly, 43, a first magnetic piece, 44, a second magnetic piece, 45 and a third magnetic piece;

5. The driving device, 51, the coil, 52, the driving magnetic component;

6. A first lens mount; 61, a first groove, 62, a mounting hole, 63, a second groove;

7. A second lens mount;

8. Guide means 81, guide rail 82, ball;

X, a first direction, Y, a second direction.

Detailed Description

Further advantages and effects of the present application will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present application with specific examples. While the description of the application will be presented in connection with certain embodiments, it is not intended to limit the features of this application to only this embodiment. Rather, the purpose of the application presented in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the application. The following description contains many specific details for the purpose of providing a thorough understanding of the present application. The application may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

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," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, but do not indicate or imply that the apparatus or elements to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the description of the present application, it should be understood that "electrically connected" in the present application may be understood as that components are in physical contact and electrically connected, and may be understood as that different components in a circuit configuration are connected by a printed circuit board (printed circuitboard, PCB) copper foil or a wire or other physical circuit capable of transmitting an electrical signal.

In the description of the present application, it should be noted that the mutual perpendicularity in the present application is not absolute perpendicularity, and that the approximate perpendicularity (for example, the included angle between two structural features is 89.9 °) due to the machining error and the assembly error is also within the scope of the mutual perpendicularity in the present application. The mutual parallelism in the present application is not absolute, and approximate parallelism (e.g., an angle of 0.1 ° between two structural features) due to machining errors and assembly errors is also within the scope of the mutual parallelism in the present application. The present application is not particularly limited thereto.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1a to 2, fig. 1a is a schematic diagram of an arrangement of a displacement detection device in a first lens focusing assembly, fig. 1b is a schematic diagram of a magnetic field distribution of a detection magnetic assembly in a first lens focusing assembly, fig. 1c is a schematic diagram of a magnetic field distribution of a detection magnetic assembly in a first lens focusing assembly, wherein a dimension of a magnetic member in a first direction is larger, fig. 1d is a schematic diagram of an arrangement of a displacement detection device in a second lens focusing assembly, fig. 1e is a schematic diagram of an arrangement of a displacement detection device in a third lens focusing assembly, fig. 1f is a schematic diagram of an effective detection stroke of a displacement detection device in a second lens focusing assembly, and fig. 2 is a stroke-magnetic field intensity variation curve of a different displacement detection device in a lens focusing assembly.

Along with the faster and faster technology updating of electronic devices, the imaging quality requirements of users on the camera modules are also higher and higher. In order to improve the imaging quality of the camera modules, more and more camera modules of electronic devices are configured with an anti-shake function and an automatic zooming function. In order to compensate for the shake effect and realize the auto-zoom function, it is necessary to perform position feedback using a sensor having a long-stroke, high-precision position detection function.

In the prior art, as shown in fig. 1a and 1b, the displacement detection means 4 'of the lens focusing assembly 2' in the camera module typically performs position detection by means of the mutual cooperation between the magnetic sensor 41 'and the magnetic assembly 42'. The magnetic assembly 42 'includes two magnetic members 43', wherein the two magnetic members 43 'are adjacently and fixedly disposed on a moving member 9' (i.e., a lens mounting base for mounting a lens group, which may also be referred to as a mover) of the lens focusing assembly 2 'along a first direction X' (the first direction X 'is an optical axis direction), and have opposite magnetic pole directions on the same side, and the magnetic sensor 41' is fixedly disposed on a fixing member (i.e., a housing, which may also be referred to as a stator, not shown) of the lens focusing assembly 2', and is disposed corresponding to the magnetic assembly 42'. When the magnetic assembly 42 'moves along the first direction X' with the moving member 9 'of the lens focusing assembly 2' relative to the fixed member due to the difference in magnetic field strength around the magnetic assembly 42', the relative positions of the magnetic sensor 41' and the magnetic assembly 42 'change, the magnetic field strength detected by the magnetic sensor 41' changes, and the controller (for example, a chip) determines the real-time position of the moving member 9 'according to the received change in magnetic field strength, so that the driving device 5' of the lens focusing assembly 2 'is controlled to drive the moving member 9' to move to the target position according to the real-time position. However, during the movement of the moving member 9', the current position of the moving member 9' can be accurately confirmed only when the magnetic field strengths detected by the magnetic sensor 41 'are different when the moving member 9' moves to each position. The magnetic field strengths of the two magnetic members 43' are different in a certain size range (along the first direction X ') around the joint, and the size range is the distance between the positions corresponding to the peaks of the detected magnetic field strengths when the magnetic sensor 41' translates along the first direction X ' relative to the magnetic assembly 42 '. When the magnetic sensor 41 'moves in the first direction X' to a position further away from the junction of the magnetic pieces 43', the change curve of the displacement-magnetic field strength becomes gentle, and the magnetic field strengths at a plurality of positions become equal, affecting the detection position of the magnetic sensor 41'. Thus, the effective detection stroke of the magnetic sensor 41 'can be understood as the distance between the positions corresponding to the magnetic field intensity peaks around the junction of the two magnetic members 43'.

In one embodiment, as shown in fig. 1a and 1b, the displacement detecting device 4' of the lens focusing assembly 2' performs position detection by using one sensor and two magnetic pieces 43', but in this mode, the distance between the positions corresponding to the magnetic field intensity peaks around the junction of the two magnetic pieces 43' is within 1mm, that is, the effective detection stroke of the magnetic sensor 41' is within 1mm (as shown by a curve S1 in fig. 2), and the effective detection stroke is short.

It should be noted that, as shown in fig. 1c, the dimension of the magnetic member 43' in the first direction X ' has no significant effect on the distance between the positions corresponding to the magnetic field intensity peaks (or it can be understood that the effective detection stroke of the magnetic sensor 41 '), and the increase in the dimension of the magnetic member 43' only increases the gentle region of the displacement-magnetic field intensity curve, so that the effective detection stroke of the magnetic sensor 41' cannot be improved.

In another embodiment, as shown in fig. 1d and 1e, the displacement detecting device 4' of the lens focusing assembly 2' performs position detection by using two or three magnetic sensors 41' and two magnetic members 43', and the effective detection stroke of each sensor is calculated appropriately to obtain a total effective detection stroke, which is improved compared with the case of a single magnetic sensor 41', but is up to 2mm (as shown by curves S2 to S5 in fig. 2), and cannot be further improved. However, the multiple sensors increase the cost of the lens focusing assembly 2', and require more magnetic field signal collecting channels, which increases the operation burden of the controller, and has high technical capability requirement and limited applicability.

The effective detection stroke calculation method of the multi-sensor scheme is described by taking the mode of two magnetic sensors and two magnetic members 43' as an example. As shown in fig. 1f, the sum X2 of the distances 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 stroke of the two magnetic sensors plus the two magnetic pieces 43', which is increased compared to the effective detection stroke X1 of the single sensor scheme.

Further, as shown in fig. 2, the displacement-magnetic field intensity curve of one of the two magnetic sensors 41' is shown as S2, the displacement-magnetic field intensity curve of the other magnetic sensor 41' is shown as S3, and by analyzing the displacement-magnetic field intensity curves S2 and S3, the effective detection stroke of both the magnetic sensors 41' is within 1 mm. Whereas the displacement-magnetic field intensity curves of the two magnetic sensors plus the two magnetic members 43 'are shown as S4, the displacement-magnetic field intensity curves of the three magnetic sensors plus the two magnetic members 43' are shown as S5. As can be seen from curves S4 and S5 in fig. 2, the effective detection travel by means of two or three magnetic sensors plus two magnetic elements 43' can be up to 2mm.

Based on this, the application provides a lens focusing assembly, the displacement detection device in the lens focusing assembly only needs to adopt a mode of one magnetic sensor and three magnetic pieces to detect the position, and the magnetic pole polarity distribution of the three magnetic pieces in the detection magnetic assembly is arranged, so that when the magnetic sensor translates relatively to the detection magnetic assembly, the position of the corresponding magnetic field intensity peak value is far away from the second magnetic piece positioned in the middle position (or the distance between the positions corresponding to the magnetic field intensity peak values is increased), thereby effectively increasing the effective detection stroke of the displacement detection device. And only one magnetic sensor is adopted, so that the cost of the lens focusing assembly is reduced, the technical capability requirement on the controller is low, and the applicability is wider. Therefore, the problems that in the prior art, the effective detection stroke of a displacement detection device of a lens focusing assembly is small, the detection cost is high by adopting a scheme of a plurality of sensors, the technical capability requirement on a controller is high, and the applicability is limited are solved.

The application also provides electronic equipment, and the electronic equipment is applied to the lens focusing assembly. It should be noted that the electronic device is a type of electronic device configured with a camera, and specifically includes, but is not limited to, a display, a notebook (notebook), a tablet (tablet personal computer), a Personal Digital Assistant (PDA), a personal computer (personal computer, PC), a smart phone, a smart wearable device, and a vehicle-mounted device, which do not limit the protection scope of the present application. For convenience of explanation, the following description will take an example in which the electronic device is a mobile phone.

Referring to fig. 3a to 4, fig. 3a is a schematic structural diagram of a front view of an electronic device according to an embodiment of the application, fig. 3b is a schematic exploded structural diagram of fig. 3a, fig. 3c is a schematic sectional view of fig. 3a along the direction A-A, and fig. 4 is a schematic perspective structural diagram of a back view of an electronic device according to an embodiment of the application.

As shown in fig. 3a to 3c, the electronic device 100 includes a housing 102, a camera module 1, a display screen 101 mounted on the housing 102, and a circuit board (not shown in the drawings), where the housing 102 plays a role in protecting the electronic device 100 and supporting the whole machine, and an accommodating space is formed inside the housing for accommodating components of the electronic device 100. The display screen 101 and the circuit board are disposed in the accommodation space of the housing 102 and are connected to the housing 102. The camera module 1 is mounted in the housing 102. The camera module 1 can realize long-stroke focusing and zooming functions, has better imaging effect when shooting a remote picture, and has lower manufacturing cost.

Those skilled in the art will appreciate that the specific configuration of the housing 102 is not limited. In one embodiment, the case 102 includes a middle frame 104 and a rear cover 103, the middle frame 104 includes a bottom plate 105 and an outer frame 106 disposed around and contacting the outer peripheral side of the bottom plate 105, and the display screen 101 and the rear cover 103 are respectively mounted at both ends of the outer frame 106 in the thickness direction of the electronic device 100 such that the display screen 101 and the rear cover 103 are respectively located at both sides of the bottom plate 105. A mounting cavity is formed between the rear cover 103 and the bottom plate 105 for mounting internal components such as a battery, a circuit board, a camera, an antenna, and the like. In one embodiment, the circuit board is mounted in a mounting cavity between the rear cover 103 and the bottom plate 105.

As will be appreciated by those skilled in the art, the base plate 105 is a support frame that is located inside the electronic device 100. The outer frame 106 is a structure surrounding the outer periphery of the electronic device 100. Referring to fig. 3c, an outer bezel 106 may extend around the periphery of the electronic device 100 and the display screen 101, and may specifically surround four sides of the display screen 101 to help secure the display screen 101. In some embodiments, the outer rim 106 may be a metal rim made of a metal material such as copper, magnesium alloy, stainless steel, or the like. In other embodiments, the outer frame 106 may be a non-metal frame (i.e., an insulating frame), including a plastic frame, a glass frame, a ceramic frame, etc., or a combination of a metal frame and a non-metal frame.

It should be noted that, the bottom plate 105 and the outer frame 106 may be a split structure or an integral structure, and the embodiment of the present application is not limited thereto. When the bottom plate 105 and the outer frame 106 are in a split structure, the bottom plate 105 and the outer frame 106 are two different parts of the shell 102, and can be assembled together in a clamping, buckling and other modes, and can be separated when the bottom plate is required to be disassembled. When the bottom plate 105 and the outer frame 106 are integrally formed, the connection between the bottom plate 105 and the outer frame 106 cannot be divided, for example, the bottom plate 105 and the outer frame 106 are manufactured by integrally forming or by assembling by a permanent connection method such as welding.

The rear cover 103 is a structure of the electronic device 100 opposite to the display screen 101, and is used for sealing components of the electronic device 100 inside the electronic device 100, and preventing dust, collision and hardware scratch. The rear cover 103 may be a rear cover made of a metal material (i.e., a metal rear cover) or a rear cover made of a non-conductive material (i.e., a non-metal rear cover), such as a glass rear cover, a plastic rear cover, or the like. In some embodiments, the electronic device 100 may not include the rear cover 103 separately provided, but the bottom plate 105 of the middle frame 104 may be used as the rear cover 103, which is not limited by the present application. The above is a detailed description of the housing 102 of the electronic device 100, and the following description of other components is continued.

The circuit board may be the main board 108 of the electronic device 100 or a sub-board (for example, a sub-board of a folding screen mobile phone) as a carrier for electrical connection of electronic components. In one embodiment, the circuit board is the motherboard 108 of the electronic device 100. The size of the circuit board and its location within the electronic device 100 is not limited and is shown for illustrative purposes only and is not intended to limit the scope of embodiments of the present application. The circuit board includes a plurality of functional modules (not shown) connected to realize corresponding functions, such as a charging management module, a power management module, a wireless communication module, an audio module, etc., which are not limited in the present application.

In one embodiment, the electronic device 100 further comprises a processor 109 (not shown in the figures). The processor 109 may perform functions of running an operating system, processing various data, running applications, and controlling a plurality of hardware devices coupled to the processor 109.

Further, the display screen 101 of the electronic device 100 is used for displaying images, and the specific type thereof is not limited, and may be an organic light-emitting diode (OLED) display screen 101, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini light-emitting diode (mini organic light-emitting diode) display screen, a micro light-emitting diode (micro organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, or a quantum dot light-emitting diode (QLED) display screen, which is not limited in the present application. A user may interact with the electronic device 100 through the display 101, and perform operations such as photographing with a camera.

It should be noted that, the position where the camera module 1 can be installed in the electronic device 100 according to the requirement is not limited. For example, it may be mounted on the front, back, or side of the electronic device 100. In the embodiment of the present application, a side where the display screen 101 of the electronic device 100 is located is defined as a front side of the electronic device 100, a side where the rear cover 103 of the electronic device 100 is located is defined as a back side of the electronic device 100, and a surface connecting the front side and the back side of the electronic device 100 is defined as a side surface of the electronic device 100. In one embodiment, as shown in fig. 4, the camera module 1 is disposed on the back of the electronic device 100.

The structure of the electronic device 100 and the functions of the components thereof are described above, and the system configuration and the structure configuration of the camera module 1 will be described below.

Referring to fig. 5 to 15a, fig. 5 is a schematic diagram of an exemplary structure of a camera module according to an embodiment of the present application, fig. 6 is a schematic diagram of a control principle of an electronic device according to an embodiment of the present application, and fig. 7 to 15a are schematic diagrams of other exemplary structures of a camera module according to an embodiment of the present application.

As shown in fig. 5, 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 mount 6 of the lens focusing assembly 2. The first lens group 16 includes at least one lens (which may be one or more, and the application is not limited in this regard) which may be a lens. It should be noted that the lens group (e.g., the first lens group 16, and the second lens group 17 mentioned below) mounted in the lens focusing assembly 2 may be understood as an auto-focus lens group.

The image sensor 14 is disposed behind the first lens group 16 in the light incident direction. The lens 15 may project light emitted from an 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 auto-zoom function of the camera module 1, it may be realized by moving the lens 15 or the image sensor 14. Therefore, the lens 15 may be used as a moving member, or the image sensor 14 may be used as a moving member. Illustratively, the lens 15 is used as a moving member.

Further, as shown in fig. 6, the processor 109 on the motherboard 108 is in communication connection with the camera module 1, and the camera module 1 can acquire an optical signal in an external environment, convert the optical signal into an electrical signal, process the electrical signal to generate image information, and send the image information to the processor 109 on the motherboard 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 requirements of video call, recording, shooting and the like of the user.

The camera module 1 may include a controller 11, where the controller 11 includes an image Processor (IMAGE SIGNAL Processor, ISP), and when the camera module 1 works, the lens 15 of the camera module 1 images a picture onto the surface of the image sensor 14, and the effective photosensitive area of the image sensor converts an optical signal of the picture into an electrical signal and transmits the electrical signal to the image Processor, and at this time, the image Processor generates picture information (i.e., external environment information), so that the picture information may be transmitted to the Processor 109 of the electronic device 100. Also, the controller 11 may control the lens focusing assembly 2 to implement an auto-focusing function, which will be described in detail later.

As shown in fig. 7, the camera module 1 may further include a front prism 13, where the front prism 13 is disposed in front of the first lens group 16 along the light incident direction, and it is understood that the front prism 13 is disposed in front of the lens focusing assembly 2 along the light incident direction.

As shown in fig. 7 and fig. 12 to 15a, the camera module 1 may further include a rear prism 12, where the rear prism 12 is disposed behind the first lens group 16 along the light incident direction, and it is understood that the rear prism 12 is disposed behind the lens focusing assembly 2 along the light incident direction. Also, 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 may change the light transmission direction.

It should be noted that, in the camera module 1, other lens groups 18 (as shown in fig. 7, 9 to 14, these lens groups may be understood as fixed lens groups) may be additionally provided in addition to the lens groups (e.g., the first lens group 16, and the second lens group 17 mentioned below) mounted in the lens focusing assembly 2, or other lens groups (as shown in fig. 8, 15 a) may not be additionally provided, and may be specifically designed according to design requirements.

Further, the number of the other lens groups 18 additionally provided in the camera module 1 is not limited, and may be one group (as shown in fig. 7, 9, 10, 13 and 14) or multiple groups (as shown in fig. 11 and 12). And, the setting positions of the other lens groups 18 are not limited. For example, as shown in fig. 7, 9, and 11, the lens focusing assembly may be disposed between the lens focusing assembly 2 and the image sensor 14, as shown in fig. 10 to 13, between the front prism 13 and the lens focusing assembly 2, as shown in fig. 12 and 14, or between the rear prism 12 and the lens focusing assembly 2. The design can be specifically carried out according to actual requirements.

As shown in fig. 7 to 15a, the image sensor 14 may be sequentially arranged along the first direction X and the lens focusing assembly 2, or may be arranged along the second direction Y and the lens focusing assembly 2. Wherein the second direction Y is perpendicular to the first direction X.

It should be noted that, as shown in fig. 12 to 15a, when the image sensor 14 is disposed 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 is required to be disposed in the camera module 1 to change the propagation direction of the light so that the light can propagate into the image sensor 14.

The system components and the structural components of the camera module 1 are described in detail above with reference to the accompanying drawings, and the displacement detection mode of the lens focusing assembly 2 is described in detail below with reference to the accompanying drawings.

Fig. 15b to 21 are schematic diagrams of a lens focusing assembly according to an embodiment of the present application, fig. 16 is a schematic diagram of a control principle of a camera module according to an embodiment of the present application, and fig. 17a is a schematic diagram of a magnetic field distribution of a magnetic detection assembly in a lens focusing assembly according to an embodiment of the present application;

Fig. 17b is a schematic diagram of an arrangement of a displacement detection device in a lens focusing assembly according to an embodiment of the present application, wherein a magnetic pole of a second magnet near a first magnet is an N pole, fig. 17c is a schematic diagram of another arrangement of a displacement detection device in a lens focusing assembly according to an embodiment of the present application, wherein a magnetic pole of a second magnet near a first magnet is an S pole, fig. 18 is a schematic diagram of yet another arrangement of a displacement detection device in a lens focusing assembly according to an embodiment of the present application, wherein each magnetic element in a detection magnetic assembly is composed of a plurality of sub-magnetic elements, fig. 19 is a schematic diagram of a magnetic field distribution of another detection magnetic assembly in a lens focusing assembly according to an embodiment of the present application, fig. 20 is a travel-magnetic field intensity variation curve when the second magnet in a lens focusing assembly according to an embodiment of the present application is a different length, and fig. 21 is a schematic diagram of yet another detection magnetic assembly in a lens focusing assembly according to an embodiment of the present application.

As shown in fig. 15b, the lens focusing assembly 2 includes a first lens mount 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 mount 6. The first lens mount 6 is slidably coupled within the housing 3 along a first direction X (e.g., moving toward the left end or toward the right end in the first direction X as shown in fig. 15 b). The first direction X is the optical axis direction of the first lens group 16. The driving device 5 is used for driving the first lens mount 6 to slide along the first direction X relative to the housing 3.

The specific configuration of the driving device 5 is not limited. In one embodiment, as shown in fig. 15b, the driving device 5 includes a driving magnetic component 52 and a coil 51, the driving magnetic component 52 is fixedly disposed on the first lens mount 6, and the coil 51 is fixedly disposed on the housing 3 at a position corresponding to the driving magnetic component 52. When a 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 generating coil 51 and the driving magnetic assembly 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 driving force can be adjusted according to the current in the coil 51, so as to adjust the moving distance of the first lens mount 6, and the moving direction of the first lens mount 6 can be controlled by controlling the current direction in the coil 51.

As shown in fig. 15b, the lens focusing assembly 2 further includes a displacement detecting device 4, the displacement detecting device 4 includes a detecting magnetic assembly 42 and a magnetic sensor 41, the detecting magnetic assembly 42 is fixedly disposed on the first lens mount 6, and the magnetic sensor 41 is fixedly disposed at a position of the housing 3 corresponding to the magnetic sensor 41. When the first lens mount 6 slides in the first direction relative to the housing 3, the magnetic sensor 41 also translates in the first direction relative to the detecting magnetic assembly 42, so that the magnetic field strength detected by the magnetic sensor 41 changes. The number of the magnetic sensors 41 in the displacement detection device 4 is not limited, and may be one or plural (for example, the number of the magnetic sensors 41 may be two, and the two magnetic sensors 41 may be arranged at intervals in the first direction X).

As shown in fig. 16, the controller 11 of the camera module 1 is electrically connected to the position detecting device and the driving device 5 in the lens focusing assembly 2, respectively. The magnetic sensor 41 in the displacement detecting device 4 is used for transmitting the acquired magnetic field intensity information to the controller 11, and then the controller 11 determines the current position of the first lens mount 6 according to the received magnetic field intensity information. When the magnetic field intensity at the current position detected by the magnetic sensor 41 is equal to the magnetic field intensity at the target position, it is known that the first lens mount 6 has moved to the target position. When the current magnetic field intensity detected by the magnetic sensor 41 deviates from the magnetic field intensity at the target position, the controller 11 controls the driving device 5 to drive the first lens mount 6 to move to the target position according to the magnitude of the deviation value of the current magnetic field intensity detected by the magnetic sensor 41 from the magnetic field intensity at the target position. Thereby ensuring the focusing or zooming effect of the camera module 1.

Further, as shown in fig. 17a and 17b, the detecting magnetic assembly 42 includes a first magnetic member 43, a second magnetic member 44, and a third magnetic member 45 sequentially disposed in the first direction X, the magnetic poles of each of the first magnetic member 43 and the third magnetic member 45 are opposite in polarity along the second direction Y, the magnetic poles of the second magnetic member 44 are opposite in polarity along the first direction X, the magnetic pole of the first magnetic member 43 facing the housing 3 is the same as the magnetic pole of the second magnetic member 44 facing the first magnetic member 43, and the magnetic pole of the third magnetic member 45 facing the housing 3 is the same as the magnetic pole of the second magnetic member 44 facing the third magnetic member 45. Wherein the second direction Y is perpendicular to the first direction X. The second direction Y may be a width direction of the lens focusing assembly 2 or a height direction of the lens focusing assembly 2, which is not limited in the present application.

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 intensity, so that the first lens mount 6 can move to the target position according to a preset track, and the lens auto-focusing function is better realized. The magnetic field intensity between the positions corresponding to the magnetic field intensity peaks is different (or it can be understood that the magnetic field intensity varies substantially linearly in the range of travel), and the effective detection travel of the magnetic sensor 41 is the distance between the positions corresponding to the magnetic field intensity peaks of the magnetic sensor 41.

As shown in fig. 17a, 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 therebetween, the N pole of the second magnetic member 44 repels the N pole of the first magnetic member 43, resulting in that the position of the peak of the magnetic field strength on the left side (the position shown by the straight line Q2 in fig. 17 a) 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 element 44 repels the S pole of the third magnetic element 45, resulting in the location of the peak magnetic field strength on the right (as shown by line Q3 in fig. 17 a) being away from the junction of the second magnetic element 44 and the third magnetic element 45. Or it can be understood that the distance between the positions corresponding to the peaks of the magnetic field intensity on the left and right sides increases, and the effective detection stroke of the magnetic sensor 41 increases.

When the magnetic sensor 41 and the detection magnetic assembly 42 move relatively in the first direction X, the magnetic sensor 41 moves farther from the middle region of the detection magnetic assembly 42 in the first direction X within the stroke range of the peak of the magnetic field intensity, and the corresponding magnetic field intensity increases. Illustratively, the magnetic field strength at the intersection point a of the movement locus Q1 of the magnetic sensor 41 and the magnetic field equipotential line with respect to the detection magnetic component 42 is greater than the magnetic field strength at the intersection point B of the movement locus Q1 of the magnetic sensor 41 and the magnetic field equipotential line, and the corresponding position at the intersection point a is further away from the middle area of the detection magnetic component 42 in the first direction X than the corresponding position at the intersection point B.

The magnetic pole of the second magnetic member 44 near the first magnetic member 43 along the first direction X may be N-pole or S-pole. And can be designed according to specific situations. In one embodiment, as shown in fig. 17b, 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 N pole, and the magnetic pole on the side close to the third magnetic member 45 is S pole. The first magnetic member 43 has a pole polarity N toward the housing 3 and a pole polarity S away from the housing 3. The third magnetic member 45 has a pole polarity N on the side far from the housing 3 and a pole polarity S on the side near the housing 3.

In another embodiment, as shown in fig. 17c, the magnetic pole of the second magnetic member 44 near the first magnetic member 43 along the first direction X is S pole, and the magnetic pole near the third magnetic member 45 is N pole. The first magnetic member 43 has a pole polarity S toward the housing 3 and a pole polarity N away from the housing 3. The third magnetic member 45 has a pole polarity S on the side away from the housing 3 and a pole polarity N on the side close to the housing 3.

As shown in fig. 17b, the displacement detecting device 4 of the lens focusing assembly 2 performs position detection by using one magnetic sensor 41 plus three magnetic members. Specifically, the polarities of the two sides of each of the first magnetic member 43 and the third magnetic member 45 in the second direction Y are opposite, the polarities of the two sides of the second magnetic member 44 in the first direction X are opposite (or it can be understood that the first magnetic member 43 and the third magnetic member 45 are magnetized in the second direction Y, the second magnetic member 44 is magnetized in the first direction X, and the magnetizing direction of the second magnetic member 44 is perpendicular to the magnetizing directions of the first magnetic member 43 and the third magnetic member 45). The polarities of the second magnetic element 44 near the first magnetic element 43 and the third magnetic element 45 are the same as the polarities of the magnetic poles of the first magnetic element 43 and the third magnetic element 45 on the side facing the housing 3. The distribution of the magnetic pole polarities of the three magnetic elements in the magnetic sensor 41 may enable the translation position corresponding to the detected peak of the magnetic field strength to be further away from the second magnetic element 44 (or it may be understood that the distance between the translation positions corresponding to the detected peak of the magnetic field strength is increased) when the magnetic sensor 41 translates along the first direction X relative to the detection magnet assembly, so that the effective detection stroke of the magnetic sensor 41 is greatly increased (for example, the effective detection stroke may reach more than 2mm, or even more than 6 mm). In addition, in the displacement detection device 4 of the present embodiment, only one magnetic sensor 41 is used, compared with a two or three sensor mode, the cost of the lens focusing assembly 2 is effectively reduced, and the technical capability requirement on a controller (for example, a chip) is low, so that the applicability is wider.

Therefore, the lens focusing assembly 2 provided by the embodiment of the application only needs to adopt a mode of adding three magnetic pieces to one magnetic sensor 41 to perform position detection, and by setting the polarity distribution of the magnetic poles of the three magnetic pieces in the magnetic sensor 41, the position of the corresponding magnetic field intensity peak value is far away from the second magnetic piece 44 when the magnetic sensor 41 translates relative to the detection magnetic assembly 42, so that the effective detection stroke of the displacement detection device 4 is effectively increased. And only one magnetic sensor 41 is adopted, so that the cost of the lens focusing assembly 2 is reduced, the technical capability requirement on the controller is low, and the applicability is wider. Therefore, the problems that in the prior art, the effective detection stroke of the displacement detection device 4 of the lens focusing assembly 2 is small, the detection cost is high by adopting a scheme of a plurality of sensors, the technical capability requirement on a controller is high, and the applicability is limited are solved.

As shown in fig. 15b, the positions of the magnetic sensor 41 and the detecting magnetic assembly 42 are not limited, so long as the positions of the magnetic sensor 41 and the detecting magnetic assembly 42 are set correspondingly, that is, the magnetic sensor 41 can detect the magnetic field intensity of the detecting magnetic assembly 42 in the range of motion, and the magnetic field intensity value basically changes linearly in the range of motion. For example, the magnetic sensor 41 may be disposed on the top of the housing 3 (top in the lens focusing assembly height direction), the detection magnetic assembly 42 may be disposed on the top of the first lens mount 6 (top in the lens focusing assembly height direction), or the magnetic sensor 41 may be disposed on the bottom of the housing 3 (bottom in the lens focusing assembly height direction), the detection magnetic assembly 42 may be disposed on the bottom of the first lens mount 6 (bottom in the lens focusing assembly height direction), in both cases, the second direction Y is the height direction of the lens focusing assembly 2, or the magnetic sensor 41 may be disposed on the side of the housing 3 (side in the lens focusing assembly width direction), the detection magnetic assembly 42 may be disposed on the side of the first lens mount 6 (side in the lens focusing assembly width direction), and in this case, the second direction Y is the width direction of the lens focusing assembly 2.

Further, the setting positions of the driving magnetic assembly 52 and the coil 51 are not limited, as long as the two are matched to drive the first lens mount 6 to move in a preset track relative to the housing 3. For example, the driving magnetic component 52 may be disposed at the top, bottom or side of the first lens mount 6, and the coil 51 may also be disposed at the top, bottom or side of the housing 3, and disposed corresponding to the driving magnetic component 52 (for example, when the driving magnetic component 52 is disposed at the top of the first lens mount 6, the coil 51 is disposed at the top of the housing 3).

In addition, the driving magnetic component 52 and the detecting magnetic component 42 may be disposed independently (for example, the driving magnetic component 52 is disposed on a side portion of the first lens mount 6, and the detecting magnetic component 42 is disposed on a top portion of the first lens mount 6), or may be partially or completely reused, which is not limited in the present application. As shown in fig. 15b, in one embodiment, the detecting magnetic component 42 is multiplexed as the driving magnetic component 52, which reduces the volume of the lens focusing component 2, is beneficial to miniaturization of the electronic device 100, and is beneficial to reducing the production cost of the lens focusing component 2.

The detection direction of the magnetic sensor 41 is not limited. For example, any angular direction perpendicular to the first direction X may be used. As shown in fig. 15b, in one embodiment, the detection direction of the magnetic sensor 41 is the second direction Y. Further, other parts having no or little influence on the magnetic field may be provided between the magnetic sensor 41 and the detection magnetic assembly 42, or other parts may be omitted. In one embodiment, no other components are provided between the magnetic sensor 41 and the detection magnetic assembly 42.

Further, the distance between the magnetic sensor 41 and the detecting magnetic assembly 42 in the second direction Y is not limited, and a change in the magnetic field strength of the detecting magnetic assembly 42 may be detected when the magnetic sensor 41 moves relative to the detecting magnetic assembly 42 in the first direction X. The position of the magnetic sensor 41 in the first direction X is not limited, and may be set at a position corresponding to the intermediate position of the second magnetic material 44 in the housing 3, at a position corresponding to the intermediate position of the first magnetic material 43 in the housing 3, or at a position corresponding to the junction between the second magnetic material 44 and the third magnetic material 45 in the housing 3, for example. In one embodiment, as shown in fig. 15b, when the first lens mount 6 is located at an intermediate position within the stroke range with respect to the housing 3 in the first direction X, the magnetic sensor 41 is located at a position in the housing corresponding to the intermediate position of the second magnetic member 44 in the first direction X.

The orthographic projection of the magnetic sensor 41 along the second direction Y may be completely overlapped with the detecting magnetic component 42, or may be partially overlapped, or may not be overlapped, and may be specifically designed according to requirements. As shown in fig. 15b, in one embodiment, the orthographic projection of the magnetic sensor 41 in the second direction Y may completely overlap with the magnetic sensor 41.

It should be noted that each magnetic element in the detecting magnetic assembly 42 may be formed by combining one or more sub-magnetic elements. And the number of the sub-magnetic pieces in each magnetic piece of the detecting magnetic assembly 42 may be equal or unequal. In one embodiment, as shown in FIG. 17b, each magnetic element in the detection magnetic assembly 42 is an integral magnetic element. Or it can be understood that each magnetic element is composed of one sub-magnetic element. In another embodiment, as shown in FIG. 18, each magnetic element in the detection magnetic assembly 42 is composed of two sub-magnetic elements. In yet another embodiment, the first magnetic element 43 and the second magnetic element 44 are each composed of two sub-magnetic elements, and the third magnetic element 45 is composed of three sub-magnetic elements.

As shown in fig. 17a and 19, the distance between the positions corresponding to the magnetic field intensity peaks is larger than the dimension 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 larger than the dimension of the second magnetic member 44 in the first direction X, and the dimension of the second magnetic member 44 in the first direction X is increased, and the effective detection stroke of the displacement detection device 4 is correspondingly increased.

Specifically, as shown in fig. 20, as the size of the second magnetic member 44 increases, the distance between the positions corresponding to the magnetic field intensity peaks increases, and the effective detection stroke of the displacement detection device 4 increases. When the second magnetic member 44 has a dimension of 4.8mm in the first direction X, the effective detection stroke of the displacement detection device 4 may reach ±2.8mm (as shown by the 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 by ±3mm or more. Or it can be understood that the effective detection travel of the displacement detection means 4 can be more than 6 mm. However, when the size of the second magnetic member 44 is larger than 5mm (not shown), the distance between the positions corresponding to the peak values of the magnetic field strength does not increase significantly. Thus, a reasonable range of dimensions of the second magnetic member 44 in the first direction X may be 0.4mm-5mm. In the limited space of the lens focusing assembly 2, the effective detection stroke of the displacement detection device 4 is effectively improved. It will be appreciated by those skilled in the art that the second magnetic member 44 may also be sized less than 0.4mm, or greater than 5mm in the first direction X, as the application is not limited in this regard.

When the detecting magnetic assembly 42 is multiplexed to drive the magnetic assembly 52, the lorentz force generated by the cooperation of the detecting magnetic assembly 42 and the coil 51 is used as the driving force for driving the first lens mount 6 to move, and the size and the magnetic pole direction arrangement of each magnetic piece in the detecting magnetic assembly 42 have a critical influence on the size of the driving force. After the design requirement of the effective detection stroke of the lens focusing assembly 2 is met and the dimensions of the second magnetic piece 44 and the magnetic pole directions of the magnetic pieces are confirmed, the dimensions of the first magnetic piece 43 and the third magnetic piece 45 can be designed according to the driving force required by driving the first lens mount 6 to move. Also, when the first lens mount 6 moves to a limit stroke, the magnetic sensor 41 should have a good magnetic field matching area with the coil 51 so that the lorentz force generated is sufficient to drive the first lens mount 6 to return to the initial position.

The dimensions of the first magnetic element 43 and the third magnetic element 45 in the first direction X may be equal or unequal. The design can be specifically carried out according to actual requirements. In one embodiment, as shown in fig. 21, the first magnetic member 43 and the third magnetic member 45 are not equal in size in the first direction X. In another embodiment, as shown in fig. 19, the first magnetic member 43 and the third magnetic member 45 are equal in size in the first direction X. This makes the interchangeability of the first magnetic member 43 and the third magnetic member 45 better, facilitates the production and manufacturing of the lens focusing assembly 2, and reduces the cost.

As shown in fig. 15b, the arrangement of the magnetic poles of each magnetic element in the magnetic component 42 can increase the distance between the positions corresponding to the peak values of the magnetic field intensity, increase the magnetic field intensity near the housing 3, and decrease the magnetic field intensity far from the housing 3. Therefore, when the detecting magnetic assembly 42 is multiplexed to the driving magnetic assembly 52, the dimensions of the first magnetic member 43 and the third magnetic member 45 in the first direction X can be designed to be smaller when the same driving force is required, so that the size of the lens focusing assembly 2 is reduced, and the size of the camera module 1 is further reduced, so that the electronic device 100 is more miniaturized.

Further, as shown in fig. 15b, the material of each magnetic element in the detection magnetic assembly 42 is not limited. For example, a magnet, or the like may be used. And, the materials of each magnetic piece can be the same or different. In one example, each magnetic member is a magnet. In another example, each magnetic member is a magnet. In yet another example, the first magnetic member 43 and the third magnetic member 45 are magnets, and the second magnetic member 44 is a magnet. The magnetic piece has common production raw materials and low production cost.

The displacement detection method of the lens focusing assembly 2 is described in detail above with reference to the accompanying drawings, and the correction method when the first lens mount 6 is offset is described in detail below with reference to the accompanying drawings.

Referring to fig. 22 to 26b, fig. 22 is a schematic diagram showing an arrangement of displacement detecting devices in a lens focusing assembly according to an embodiment of the present application, wherein the lens focusing assembly includes two displacement detecting devices, fig. 23 is a schematic diagram showing an arrangement of displacement detecting devices in a lens focusing assembly according to an embodiment of the present application, wherein the displacement detecting devices are displaced along a second direction, fig. 24 is a curve of a stroke-magnetic field intensity change when the displacement detecting devices in the lens focusing assembly according to an embodiment of the present application are displaced along the second direction, fig. 25 is a curve of a correction of the stroke-magnetic field intensity when the displacement detecting devices in the lens focusing assembly according to an embodiment of the present application are displaced along the second direction, fig. 26a is a schematic diagram showing an arrangement of displacement detecting devices in a lens focusing assembly according to an embodiment of the present application, wherein one of the detection magnetic assemblies is multiplexed as a driving magnetic assembly, and the other detection magnetic assemblies are not multiplexed as a driving magnetic assembly, and fig. 26b is a schematic diagram showing an arrangement of the displacement detecting devices in a lens focusing assembly according to an embodiment of the present application.

It should be noted that, as shown in fig. 22 and 23, when the electronic apparatus is affected by an external factor, the first lens mount 6 in the lens focusing assembly 2 may be shifted in 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, as shown in fig. 24, when the distance between the detection magnetic assembly 42 and the magnetic sensor 41 increases, the magnetic field strength detected by the magnetic sensor 41 becomes small (as shown in S13). When the distance between the first lens mount 6 and the magnetic sensor 41 decreases, the magnetic field strength detected by the magnetic sensor 41 becomes large (as shown in S11). And the error in the magnetic field intensity detected by the magnetic sensor 41 further causes the detection accuracy of the displacement detection device 4 to become low.

Illustratively, when the relative distance between the magnetic sensor 41 and the detection magnetic assembly 42 increases, and the magnetic field strength detected by the magnetic sensor 41 decreases when the first lens mount 6 moves to the predetermined position, 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, the actual position of the first lens mount 6 is deviated from the predetermined position by this adjustment. Therefore, when the relative distance between the magnetic sensor 41 and the detection magnetic assembly 42 is changed, an accuracy error is caused, and the magnetic field intensity detected by the magnetic sensor 41 is inaccurate, thereby reducing the position detection accuracy.

In one embodiment, as shown in fig. 22, the displacement detecting devices 4 are two, and the two displacement detecting devices 4 are respectively disposed between two sides of the first lens mount 6 in the second direction Y and corresponding sides of the housing 3 (see fig. 15 b). The first lens mount 6 is provided with displacement detecting means 4 on both sides in the second direction Y. Adverse effects on the position detection accuracy when the first lens mount 6 is offset relative to the housing 3 in the second direction Y can be effectively avoided, and adverse effects on the focusing/zooming effects of the lens focusing assembly 2 can be avoided.

As shown in fig. 25, when the first lens mount 6 is shifted in the second direction Y so that the relative distance between each magnetic sensor 41 and the corresponding detection magnetic assembly 42 is changed from Y1 to Y2. The magnetic field strength detected by the magnetic sensor 41 on the upper side in the second direction Y decreases (as shown in S15), and the magnetic field strength detected by the magnetic sensor 41 on the lower side in the second direction Y increases (as shown in S14). Since the pitches of the magnetic sensors 41 on both sides in the second direction Y are kept constant all the time, the portion where the magnetic field strength detected by the magnetic sensor 41 on the lower side after the offset increases is just about equal to the portion where the magnetic field strength detected by the magnetic sensor 41 on the upper side after the offset decreases, compared with the magnetic field strength detected when not being offset downward. Therefore, by performing the corresponding calculation on the magnetic field intensity detected by the upper magnetic sensor 41 and the magnetic field intensity detected by the lower magnetic sensor 41, it is ensured that the magnetic field intensity values (shown as S16) detected by the two magnetic sensors 41 are not substantially affected by the change in the distance between the magnetic sensor 41 and the corresponding detecting magnetic assembly 42 under the same stroke, which contributes to reducing the accuracy error and improving the position detection accuracy.

Further, the arrangement of the two displacement detecting devices 4 is not limited, and may be symmetrical or asymmetrical. In one example, as shown in fig. 22, two displacement detection devices 4 are symmetrically disposed. When the first lens mount 6 is offset relative to the housing 3 in the second direction Y, fitting calculation of the sensing signal is more facilitated, and the operation load of the controller is reduced.

The detection magnetic assemblies 42 of the two displacement detection devices 4 may have the same structure or may have different structures. In one embodiment, as shown in fig. 22, the detection magnetic assemblies 42 in the two displacement detection devices 4 are identical in structure. In another embodiment, the first magnetic member 43 and the third magnetic member 45 of the detection magnetic assembly 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 assembly 42 in the other displacement detection device 4 have different sizes in the first direction X.

The type of the magnetic sensor 41 in the displacement detection device 4 is not limited, and may be a hall sensor, an Anisotropic Magnetoresistance (AMR) sensor, a Tunnel Magnetoresistance (TMR) sensor, or the like. The types of the magnetic sensors 41 in the two displacement detection devices 4 may be the same or different. In one example, the magnetic sensors 41 in both displacement detection devices 4 are hall sensors. All the magnetic sensors 41 in the displacement detecting device 4 are of the same type, which is helpful for reducing the difficulty of adapting and assembling the displacement detecting device 4 and reducing the manufacturing cost.

It should be further noted that, the detecting magnetic assemblies 42 in all the displacement detecting devices 4 may be partially multiplexed into the driving magnetic assembly 52 (for example, as shown in fig. 26a, one detecting magnetic assembly 42 is multiplexed into the driving magnetic assembly 52, and the other detecting magnetic assembly 42 is not multiplexed into the driving magnetic assembly), or may be fully multiplexed into the driving magnetic assembly 52 (for example, as shown in fig. 22, the detecting magnetic assemblies 42 in two displacement detecting devices 4 are multiplexed into the driving magnetic assemblies 52 of two driving devices, respectively).

In addition, the driving magnetic elements 52 of all the driving devices 5 may be multiplexed by the detecting magnetic elements 42 (as shown in fig. 22), or may be multiplexed by the detecting magnetic elements 42 only partially (as shown in fig. 26 b). In the case that only part of the driving magnetic assemblies 52 of all the driving devices 5 are multiplexed by the detecting magnetic assembly 42, the structure of the separately provided driving magnetic assembly 52 may be the structure of the detecting magnetic assembly 42 described above (as shown in fig. 26 b), or other structures may be adopted.

The correction method when the first lens mount 6 is offset is described in detail above with reference to the accompanying drawings, and the structural composition of the lens focusing assembly 2 is described in detail below with reference to an exemplary structure.

Referring to fig. 27 to 33, fig. 27 is a schematic perspective view of an exemplary structure of a lens focusing assembly according to an embodiment of the present application, fig. 28 is a schematic perspective view of a lens focusing assembly according to an embodiment of the present application, wherein an upper case of the lens focusing assembly is not shown, fig. 29 is a schematic perspective view of a lens focusing assembly according to an embodiment of the present application, wherein a case of the lens focusing assembly is not shown, fig. 30 is a schematic exploded view of another lens focusing assembly according to an embodiment of the present application, wherein a case of the lens focusing assembly is not shown, fig. 31 is a schematic cross-sectional view of a direction B-B in fig. 29, wherein a guide rail is not shown, fig. 32 is a schematic cross-sectional view of a lens focusing assembly according to an embodiment of the present application, wherein a case of the lens focusing assembly is not shown, fig. 33 is a schematic perspective view of a lens focusing assembly according to another embodiment of the present application, wherein a case of the lens focusing assembly is not shown, fig. 34 is a schematic perspective view of a lens assembly according to another embodiment of the present application, wherein a coil assembly according to another embodiment of the present application, and the like.

As shown in fig. 27 to 28, the specific structure of the housing 3 is not limited. In one example, the housing 2 includes an upper case 31 and a lower case 32, and the upper case 31 and the lower case 32 are fastened to each other. The first lens mount 6 is provided with a mounting hole 62, the mounting hole 62 penetrates the first lens mount 6 along the first direction X, a first end of the mounting hole 62 extends to a first end face of the first lens mount 6, and a second end of the mounting hole 62 extends to a second end face of the first lens mount 6. The first lens group 16 is mounted in the mounting hole 62.

The shape of the housing 3 and the first lens mount 6 is not limited, and may be rectangular, circular, or the like. In one example, as shown in fig. 27 and 28, the housing 3 and the first lens mount 6 are each provided in a rectangular shape. The longitudinal direction of the housing 3 and the first lens mount 6 may be understood as a first direction X, the width direction may be understood as a second direction Y, and the height direction may be perpendicular to the first direction X and the second direction Y.

As shown in fig. 29, the mounting manner of the detecting magnetic assembly 42 and the first lens mount 6 is not limited, and may be directly mounted on the surface of the first lens mount 6, or may be embedded in a first groove 61 formed on the surface of the first lens mount 6. In one embodiment, the first lens mount 6 is provided with a first groove 61 along a side surface of the second direction Y, and the detecting magnetic component 42 is embedded in the first groove 61 of the first lens mount 6.

As shown in fig. 29, the lens focusing assembly 2 further includes a magnetism blocking sheet 21. The magnetism blocking sheet 21 is disposed between the magnetic component (for example, the detection magnetic component 42 or the driving magnetic component 52) and the first lens mount 6 along the second direction Y. Specifically, one side of the magnetism blocking sheet 21 in 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 component close to the first lens mount 6. The magnetism isolating sheet 21 is used for isolating magnetic field interference between the magnetism isolating sheet and the magnetic component arranged on the other side of the first lens mounting seat 6, so that the detection precision of the displacement detection device and the displacement precision when the driving device drives the first lens mounting seat 6 to move are ensured.

As shown in fig. 28 and 29, the lens focusing assembly further includes a circuit board 22, and the type of the circuit board 22 is not limited, and may be, for example, a flexible circuit board or a PCB. Illustratively, the circuit board 22 is a flexible circuit board. Further, the position of the circuit board 22 is not limited, and may be fixedly connected to the upper case or the lower case 32. In one example, the circuit board 22 is fixedly connected to the lower case 32 for electrical signal transmission of the lens focusing assembly, sends a signal to the coil 51 to drive the first lens mount 6 to move in the first direction X, and performs electrical signal transmission with the magnetic sensor 41, thereby detecting the position of the first lens mount 6.

The coil 51 and the magnetic sensor 41 are integrated on the wiring board 22, and are communicatively connected to the controller 11 via the wiring board 22. Further, the wiring board 22 is fixedly connected to the lower case 32, so that the coil 51 and the magnetic sensor 41 are fixed with respect to the lower case 32.

As shown in fig. 28 and 29, the lens focusing assembly further includes a guide 8. The first lens mount 6 is slidably connected to the housing along the first direction X through the guide 8, and the specific structure of the guide 8 is not limited. In one embodiment, as shown in fig. 28 and 29, the guide 8 includes a rail 81, and the rail 81 extends in the first direction X and is fixedly connected to the housing. The bottom surface of the first lens mounting base 6, which is close to the guide rail 81, is provided with a second groove 63 penetrating along the first direction X, and the first lens mounting base 6 and the housing are in sliding connection through the cooperation of the second groove 63 and the guide rail 81.

Further, the number of the guides 8 between the first lens mount 6 and the housing is not limited, and may be one or more. The first lens mount 6 is slidably coupled to the housing by two guides 8, for example. The shape of the second groove 63 on the bottom surface of the first lens mount 6 is not limited. For example, the shape of arc, rectangle, V-shape, trapezoid, etc. is possible. The shape of the second recess 63 on the bottom surface of the first lens mount 6 may be the same or different. In one example, the bottom surface of the first lens mount 6 is provided with two second grooves 63, one of the second grooves 63 being rectangular in shape and the other second groove 63 being trapezoidal in shape.

The material of the guide rail 81 is not limited, and may be a non-magnetic material or a strong magnetic material. In one example, the guide rail 81 is made of a strong magnetic conductive material. The guide rail 81 of the strong magnetic conductive material can be magnetically pre-pressed with the magnet assembly to avoid derailment of the first lens mount 6.

In another embodiment, as shown in fig. 30, a second groove 63 is formed on the bottom surface of the first lens mount 6, and a third groove 33 is formed on the surface of the lower case 32 near the bottom surface of the first lens mount 6 at a position corresponding to the second groove 63. The first lens mount 6 is slidably coupled with the housing in the first direction X by the balls 82 accommodated in the second groove 63 and the third groove 33.

As shown in fig. 31 and 32, the detection magnetic assembly 42 may be disposed between the magnetic members (e.g., between the first magnetic member 43 and the second magnetic member 44, between the second magnetic member 44 and the third magnetic member 45) in the first direction X in a contact manner or may be disposed at intervals. In one embodiment, as shown in fig. 31, the detection magnetic assembly 42 is disposed in contact in the first direction X between the magnetic members (e.g., between the first magnetic member 43 and the second magnetic member 44, between the second magnetic member 44 and the third magnetic member 45). It should be noted that, limited by the current assembly process, there may be a certain gap between the magnetic members of the detecting magnetic assembly 42 when they are disposed in contact along the first direction X. Of course, the present application is not limited in this regard, as it may be realized in a process in which the magnetic elements of the detecting magnetic assembly 42 may be in close contact with each other in the first direction X without gaps.

In another embodiment, as shown in fig. 32, the detecting magnetic members 42 are arranged at intervals in the first direction X (for example, between the first magnetic member 43 and the second magnetic member 44, between the second magnetic member 44 and the third magnetic member 45). The space between the magnetic members may be filled with a non-magnetically conductive gas (for example, air), or may be a non-magnetically conductive member 23 (the non-magnetically conductive member 23 does not adhere to the magnetic members, that is, does not generate magnetic attraction). The specific material of the non-magnetic conductive member 23 is not limited, and may be a non-magnetic conductive metal or a non-metal. Those skilled in the art will choose from the specific case. In one example, the non-magnetically permeable member 23 may be made of a metal material such as aluminum or copper. In another example, the non-magnetic conductive member 23 may be made of a non-metal material such as plastic. The distance between the magnetic members of the detecting magnetic assembly 42 is not limited. Those skilled in the art can design the device according to the actual situation.

Further, the non-magnetic conductive member 23 and the first lens mount 6 may be integrally formed or may be separately formed. In one embodiment, as shown in fig. 32, the non-magnetic conductive member 23 and the first lens mount 6 are separated. In another embodiment, the non-magnetically permeable member 23 and the first lens mount 6 are of unitary construction. Or it may be understood that the first groove 61 formed on the surface of the first lens mount 6 may include a plurality of sub-grooves, each magnetic element of the detecting magnetic assembly 42 is disposed in a corresponding sub-groove, and the material of the first lens mount 6 is a non-magnetic material.

As shown in fig. 33, the integral structure of the first lens mount 6 and other structural members fixed to the first lens mount 6 can be understood as a moving member that moves quantitatively in the first direction X in an orientation to achieve focusing or zooming. It should be noted that the number of moving parts in the lens focusing assembly is not limited, and other moving parts (the structure of which may be the same as or different from that of the moving parts) may be additionally provided in addition to the moving parts, or other moving parts may not be additionally provided. In one embodiment, as shown in fig. 28, the lens focusing assembly 2 includes only one moving member (i.e., the integral structure of the first lens mount 6 and other structural members fixed to the first lens mount 6).

In another embodiment, as shown in fig. 34, two moving members are provided in the lens focusing assembly 2. Specifically, the lens focusing assembly includes the second lens mount 7 in addition to the integral structure of the first lens mount 6 and other structural members fixed to the first lens mount 6. The lens 15 further includes a second lens group 17, the second lens group 17 is mounted on the second lens mount 7, and the second lens mount 7 is slidably connected in the housing along the first direction X and is disposed opposite to the first lens mount 6 in the first direction X. The second lens mount 7 is disposed opposite to the first lens mount 6 along the first direction X, and can better implement a focusing or zooming function of the lens focusing assembly by adjusting the distance between the first lens group 16 and the second lens group 17.

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 detecting device 4 for detecting the position of the first lens mount 6 and the displacement detecting device for detecting the position of the second lens mount 7 both perform position detection by using the mode of adding three magnetic pieces to one magnetic sensor 41 provided by the application.

In another embodiment, as shown in fig. 35, the displacement detecting device 4 for detecting the position of the first lens mount 6 performs position detection by using one magnetic sensor 41 plus three magnetic members provided by the present application, and the displacement detecting device for detecting the position of the second lens mount 7 performs position detection by using one magnetic sensor plus two magnetic members as shown in the prior art.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A lens focusing assembly, comprising:

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 as described in claim 2, characterized in that the two displacement detection devices (4) are symmetrically arranged.

4. The lens focusing assembly as described in claim 1 is 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 relative to the housing (3) along the first direction (X), 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, characterized in that a 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, characterized in that the first magnetic member (43) and the third magnetic member (45) have the same size in the first direction (X).

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

8. The lens focusing assembly as described in claim 1 is characterized in that the lens focusing assembly (2) also includes a second lens (15) mounting seat, the second lens (15) mounting seat is used for the second lens group of the lens (15), the second lens (15) mounting seat is slidably connected to the housing (3) along the first direction (X), and is 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 members is a magnet or a magnet.

10. A camera module, characterized in that it comprises a lens (15) and a lens focusing assembly (2) according to 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, characterized in that the camera module (1) further comprises a front prism (13) and an image sensor (14), wherein 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 behind 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) according to claim 10 or 11, wherein the camera module (1) is installed in the housing (102).