Lens driving device and camera module

Abstract

The application discloses a lens driving device and a camera module. The lens driving device comprises a base, a frame movably arranged on the base, a lens driving assembly for driving the frame to move relative to the base, a driving magnet part, an anti-shake supporting part, and an anti-shake magnetic attraction part. The anti-shake magnetic attraction part is magnetically attracted to the driving magnet part, and is used for attracting the frame to the base so that the frame is supported on the top surface of the base through the anti-shake supporting part. The anti-shake supporting part comprises at least three anti-shake balls. Any two anti-shake balls are used as supporting shafts. The magnetic attraction force between the anti-shake magnetic attraction part and the driving magnet part has a greater torque on the frame than the gravity of the frame and other camera module components supported by the frame.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of camera, in particular to a lens driving device and a camera module. BACKGROUND

[0002] With the improvement of living standards, consumers demand more and more for camera quality. Accordingly, the requirements for the lens driving device in the camera module are also increasing.

[0003] For example, for common optical focusing and optical anti-shake functions, the general camera module is generally configured with a corresponding lens driving device. However, due to the setting of the lens driving device, the stability inside the camera module becomes increasingly important, which puts new requirements on the structural design of the lens driving device.

[0004] Therefore, it is hoped to propose a new lens driving device and camera module design to make the driving of the optical lens more stable and improve the imaging quality of the camera module. SUMMARY

[0005] One purpose of the present application is to provide a lens driving device and a camera module, which overcome the shortcomings of the prior art, optimize the structure of the lens driving device, and improve the imaging quality of the camera module with the lens driving device.

[0006] According to one aspect of the present application, a lens driving device is provided, which comprises:

[0007] a base;

[0008] a frame movably arranged on the base;

[0009] a lens driving assembly for driving the frame to move relative to the base, the lens driving assembly comprising a driving magnet portion;

[0010] an anti-shake support portion; and

[0011] an anti-shake magnetic attraction portion, which is magnetically attracted to the driving magnet portion, and is used to attract the frame to the base so that the frame is supported on the top surface of the base by the anti-shake support portion, the anti-shake support portion comprising at least three anti-shake balls, any two of the at least three anti-shake balls serving as a supporting shaft, and the magnetic attraction force between the anti-shake magnetic attraction portion and the driving magnet portion has a greater torque on the frame than the gravity of the frame and other camera module components supported by the frame.

[0012] In some embodiments, the anti-shake support portion comprises four anti-shake balls, and the four anti-shake balls are arranged in a trapezoidal shape between the frame and the base.

[0013] In some embodiments, the lens driving device further comprises a carrier for carrying the optical lens, the carrier being movably arranged between the frame.

[0014] In some embodiments, the lens driving device further comprises a focusing support portion arranged between the carrier and the frame along a first direction, and a focusing magnetic attraction portion for attracting the carrier to the frame so that the carrier is supported by the focusing support portion on a side of the frame close to the optical axis.

[0015] In some embodiments, the lens driving device further comprises a focusing position sensing assembly and the driving magnet portion are arranged on different sides of the lens driving device.

[0016] In some embodiments, the focusing position sensing assembly comprises a focusing position sensing element and a focusing position sensing magnet oppositely arranged along a first direction parallel to the optical axis of the optical lens, the focusing position sensing element being fixed to the carrier, and the focusing position sensing magnet being fixed to the frame.

[0017] In some embodiments, the driving magnet portion is arranged on the frame, the driving magnet portion comprises a first driving magnet, a second driving magnet and a third driving magnet, the second driving magnet and the third driving magnet are arranged on two sides of the first driving magnet, and the focusing position sensing magnet is arranged on the opposite side of the first driving magnet.

[0018] In some embodiments, a bottom surface of the first driving magnet is flush with a bottom surface of the second driving magnet and a bottom surface of the third driving magnet, a top surface of the first driving magnet is higher than a top surface of the second driving magnet and a top surface of the third driving magnet, and a bottom surface of the focusing position sensing magnet is lower than the top surfaces of the second driving magnet and the third driving magnet.

[0019] In some embodiments, the lens driving device further comprises a focusing coil portion and an anti-shake coil portion, wherein the focusing coil portion is arranged on the carrier and opposite to the driving magnet portion, the focusing coil portion comprises a focusing coil arranged opposite to the first driving magnet; the anti-shake coil portion is arranged on the base and opposite to the driving magnet portion, the anti-shake coil portion comprises a first anti-shake coil, a second anti-shake coil and a third anti-shake coil arranged opposite to the first driving magnet, the second driving magnet and the third driving magnet respectively.

[0020] In some embodiments, the lens driving device further comprises a driving conductive assembly, the driving conductive assembly comprises a carrier conductive part arranged on the carrier, a base conductive part arranged on the base, and a conductive connecting part electrically connecting the carrier conductive part and the base conductive part, wherein the carrier conductive part comprises a first coil conductive part, a second coil conductive part fixed on the carrier, and a carrier circuit board, the focus position sensing element is fixed and electrically connected to the carrier circuit board, the first coil conductive part and the second coil conductive part electrically connect the focus coil and the carrier circuit board, and the anti-shake coil part is electrically connected to the base conductive part.

[0021] In some embodiments, the driving conductive assembly is further configured to electrically connect with an aperture device, the aperture device comprises a first electrically conductive strip and a second electrically conductive strip, the first electrically conductive strip and the second electrically conductive strip respectively extend outward from opposite sides of the aperture device and are fixed to the top surface of the carrier, and the first electrically conductive strip and the second electrically conductive strip are respectively electrically connected to the driving conductive assembly.

[0022] In some embodiments, the lens driving device further comprises a cover fixed to the base, the aperture device is arranged above the cover, the first electrically conductive strip and the second electrically conductive strip pass through cover through-holes of the cover, are fixed to the top surface of the carrier, and are electrically connected to the carrier conductive part and the conductive connecting part fixed to the carrier.

[0023] According to another aspect of the present application, there is provided a camera module comprising:

[0024] an optical lens having an optical axis;

[0025] a light sensing device configured to receive light emitted by the optical lens and to form an image therefrom; and

[0026] The lens driving device of any one of the preceding claims, wherein the driving device is adapted to drive movement of the optical lens.

[0027] In some embodiments, the camera module further comprises an aperture device fixed to the optical lens, the aperture device comprises an aperture fixed part, an aperture movable part, a blade assembly, an aperture driving part, and an aperture conductive part, the aperture movable part is movably arranged on the aperture fixed part, the blade assembly is linked to the aperture movable part, the aperture driving part is arranged between the aperture movable part and the aperture fixed part, the aperture conductive part is configured to provide a driving power source for the aperture driving part, the aperture driving part drives the aperture movable part to move relative to the aperture fixed part, and the blade assembly has an adjustable aperture hole, and the blade assembly changes the size of the aperture hole with the movement of the aperture movable part.

[0028] Additional implementations and features are set forth in part in the following description, and in part will become apparent to those skilled in the art upon examination of the specification or can be learned by practice of the disclosed subject matter. The features and advantages of the disclosure can be realized and attained by means of the instruments and combinations particularly pointed out in the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of a camera module according to the present application;

[0030] Figure 2 and Figure 3 are cross-sectional views of a camera module according to the present application in two perpendicular directions;

[0031] Figure 4 is an exploded view of an aperture device according to the present application;

[0032] Figure 5 is an exploded view of a lens driving device according to the present application;

[0033] Figure 6 is a perspective view of a carrier and a frame according to the present application;

[0034] Figure 7 is a perspective view of a lens driving device according to the present application with the carrier, the frame, the base and part of other components removed;

[0035] Figure 8 is a top view of a lens driving device according to the present application with the cover removed;

[0036] Figure 9 is a perspective view of a camera module according to the present application with the cover removed.

[0037] Figure 10 is a top view of a driving magnet portion, an anti-shake magnetic attraction portion and an anti-shake support portion according to the present application. DETAILED DESCRIPTION

[0038] Hereinafter, the present application will be further described with reference to the specific embodiments, it should be noted that the following described embodiments or technical features between each other or between each other can be combined to form a new embodiment without conflict.

[0039] “comprising”, this term is open. As used in the appended claims, this term does not exclude additional structures or steps.

[0040] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0042] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] It should be noted that, as used in the present application, the phrases "substantially", "approximately" and similar phrases are used as approximate terms, not as terms of degree, and are intended to indicate inherent deviations in measured or calculated values that will be recognized by those of ordinary skill in the art.

[0044] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Various units, circuits, or other components can be described or claimed as “configured” to perform a task or tasks. In such contexts, “configured” is used to connote that the unit / circuit / component includes structure (e.g., circuitry) that performs the task or tasks during operation. As such, the unit / circuit / component can be said to have been “configured” to perform the task or tasks.

[0046] The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting. As used in the description and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term “and / or” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. It will be further understood that the terms “comprises” and / or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0047] To control the amount of incident light entering the camera module to adapt to the shooting of different environments, an aperture device can be provided in the camera module to adjust the size of the aperture aperture of the camera module. The aperture device needs to be arranged on the light path of the camera module, and needs to be powered to realize the adjustment of the aperture aperture. Therefore, when the aperture device is arranged in the camera module, the arrangement position and power supply mode of the aperture device need to be considered, especially for the camera module with a lens driving device, the cooperation between the lens driving device and the aperture device also needs to be considered to reduce the adverse effects caused by the arrangement of the aperture device.

[0048] Based on this, the present application provides a lens driving device and a camera module with the lens driving device, the camera module is provided with an aperture device, and the lens driving device is adapted to cooperate with the aperture device to reduce the interference between the functions of the aperture device and the lens driving device, and to provide good shooting effect.

[0049] Correspondingly, Figures 1 to 9 A lens driving device 20 and a camera module 1 with the lens driving device 20 according to some embodiments of the present application are shown. As shown in FIG. 1, the camera module 1 includes a lens driving device 20 and an aperture device 10. The lens driving device 20 is arranged on the light path of the camera module 1, and the aperture device 10 is arranged on the light path of the camera module 1. Figures 1 to 9As shown, the camera module 1 includes an optical lens 10, a lens driving device 20, a photosensitive device 30, and an aperture device 40. The optical lens 10 is held on a light path of the photosensitive device 30 by the lens driving device 20. The photosensitive device 30 is configured to receive light emitted by the optical lens 10 to form an image of an object. The lens driving device 20 is adapted to drive the optical lens 10 to move to adjust optical performance (e.g., to achieve optical focusing, optical image stabilization, etc.). The aperture device 40 is disposed on an object side of the optical lens 10 to adjust the amount of light incident on the optical lens 10, thereby adjusting the imaging effect of the image formed by the photosensitive device 30.

[0050] The optical lens 10 includes a lens barrel 12 and at least one optical lens 11 mounted in the lens barrel 12. The optical lens 10 has an optical axis O, and the optical axis O of the optical lens 10 is also the optical axis of the optical lenses 11. The at least one optical lens 11 is disposed in the lens barrel 12 along the optical axis, and the photosensitive device 30 is disposed opposite the optical lens 10 along the optical axis. For ease of description, the side of the camera module 1 facing the object is referred to as the object side, the side of the camera module 1 facing the photosensitive device 30 is referred to as the image side, the optical axis direction includes a direction along the optical axis pointing to the image side and a direction along the optical axis pointing to the object side, the horizontal direction is a direction perpendicular to the optical axis direction, and the height direction is a direction along the optical axis direction.

[0051] In some embodiments of the present application, the lens barrel 12 is a one-piece lens barrel, and all the optical lenses 11 are mounted in the one-piece lens barrel. In other embodiments of the present application, the lens barrel 12 is a split lens barrel including a first lens barrel 121 and a second lens barrel 122. The first lens barrel 121 is fixed to the object side of the second lens barrel 122 by adhesive bonding. Some of the optical lenses 11 are mounted in the first lens barrel 121, and the other optical lenses 11 are mounted in the second lens barrel 122. It should be understood that the optical lens 10 using either a one-piece lens barrel or a split lens barrel can be applied to the camera module 1 of the present application.

[0052] Continuing to refer to Figure 2 and Figure 3 , the optical lens 10 is fixed in the lens driving device 20, and the photosensitive device 30 is fixed to the image side of the lens driving device 20. Thus, the optical lens 10 can be held on the light path of the photosensitive device 30 by the lens driving device 20. The optical lens 10 is adapted to be driven by the lens driving device 20 to achieve optical image stabilization, optical focusing, etc.

[0053] The aperture device 40 is fixed to the lens barrel 12 of the optical lens 10, so that the relative position between the aperture device 40 and the optical lens 10 is fixed. In this way, when the optical lens 10 is driven by the lens driving device 20, the aperture device 40 can move with the movement of the optical lens 10, and the movement of the optical lens 10 does not affect the adjustment of the light amount of the optical lens 10 by the aperture device 40.

[0054] Specifically, the photosensitive device 30 includes a photosensitive assembly 31 and a filter assembly 32. The photosensitive assembly 31 includes a chip circuit board 312, and a photosensitive chip 311 and at least one electronic component 313 electrically connected to the chip circuit board 312. The photosensitive chip 311 is used to receive the light reflected by the object collected by the optical lens 10 to form an image and is electrically connected to an external electronic device through the chip circuit board 312. The chip circuit board 312 can be a hard circuit board (PCB), a flexible circuit board (FPC), or a combination of hard and soft boards. The electronic component 313 can be one or more of passive electronic devices such as resistors and capacitors, or one or more of active electronic devices such as driving chips and memory chips.

[0055] The filter assembly 32 includes a filter element 321 and a filter support 322, the filter element 321 is fixedly installed on the filter support 322 and corresponds to the photosensitive chip 311, so that the filter element 321 is kept on the photosensitive path of the photosensitive chip 311. The filter support 322 has a light passing hole, the incident light of the optical lens 10 passes through the light passing hole to the photosensitive chip 311, the filter element 321 is arranged between the optical lens 10 and the photosensitive chip 311, which filters the incident light, such as infrared light, and filters out the stray light that is not needed for imaging. The filter support 322 is fixed to the chip circuit board 312, it should be understood that the filter support 322 can be preformed and then fixed to the chip circuit board 312 by, for example, adhesive medium; or it can be directly fixed to the chip circuit board 312 by, for example, an integral molding process, and the present application is not limited in this regard. It is worth mentioning that in one example, the photosensitive assembly 31 can be fixed to the image side of the lens driving device 20 through the filter support 322; in another example, the photosensitive assembly 31 can also be fixed to the image side of the lens driving device 20 through the chip circuit board 312.

[0056] Reference Figures 2 to 4As shown, the aperture device 40 includes an aperture fixed part 41, an aperture movable part 42, a blade assembly 43, an aperture driving part 44, and an aperture conducting part 47. The aperture movable part 42 is movably arranged on the aperture fixed part 41, the blade assembly 43 is linked to the aperture movable part 42, the aperture driving part 44 is arranged between the aperture movable part 42 and the aperture fixed part 41, the aperture conducting part 47 is configured to provide driving power for the aperture driving part 44, the aperture driving part 44 drives the aperture movable part 42 to move relative to the aperture fixed part 41, and the blade assembly 43 has an adjustable aperture hole, and the size of the aperture hole is changed with the movement of the aperture movable part 42. It should be understood that the aperture driving part 44 can be implemented as a coil-magnet pair, an SMA wire, a piezoelectric actuator, or other types of driving elements, and the present application is not limited thereto.

[0057] The aperture fixed part 41 and the aperture movable part 42 each have a through hole to enable light to pass through the aperture device 40. Specifically, the aperture fixed part 41 includes an aperture fixed seat 411 and an aperture upper cover 412 fixed to the aperture fixed seat 411, and the aperture fixed seat 411 and the aperture upper cover 412 each have a corresponding through hole to enable light to pass through the aperture fixed part 41. The aperture fixed seat 411 and the aperture upper cover 412 are buckled to each other to form a receiving cavity for receiving the aperture movable part 42, the blade assembly 43, and the aperture driving part 44. The aperture movable part 42 also has a through hole to enable light to pass through the aperture movable part 42.

[0058] Further, the aperture device 40 is directly or indirectly fixed to the optical lens 10 through the aperture fixed seat 411 of the aperture fixed part 41, and the relative position between the aperture device 40 and the optical lens 10 can be kept fixed, that is, even if the optical lens 10 moves, the aperture device 40 can move with the optical lens 10, and the aperture adjustment effect is not affected. Specifically, in one example, as shown in FIG. 2, the aperture device 40 is fixed to the optical lens 10 through the aperture fixed seat 411 of the aperture fixed part 41, and the aperture device 40 and the optical lens 10 are arranged in a fixed manner. Figure 2 and Figure 3As shown, the aperture fixing seat 411 is fixed to the lens barrel 12 of the optical lens 10, so that the aperture device 40 is directly fixed to the optical lens 10. The lens barrel 12 has an aperture mounting surface, the optical lens 10 has a radial dimension gradually increasing along the direction of light incidence, the part of the optical lens 10 above the aperture mounting surface extends into the aperture device 40, and the aperture fixing seat 411 is fixed to the aperture mounting surface by bonding, for example, by an adhesive medium. In another example, the lens barrel 12 can be the aforementioned split lens barrel, the aperture mounting surface is located on the second lens barrel 122, the aperture fixing seat 411 is fixed to the aperture mounting surface of the second lens barrel 122, and the first lens barrel 121 is fixed to the aperture device 40, so that the aperture device 40 is arranged between the first lens barrel 121 and the second lens barrel 122, and thus the aperture device 40 can change the size of the aperture hole between the plurality of optical lenses 11 of the optical lens 10. In yet another example, the aperture fixing seat 411 is fixed to a component of the lens driving device 20 for holding the optical lens 10, for example, the aperture fixing seat 411 is fixed to the carrier 24 of the lens driving device 20, and the optical lens 10 is fixed in the carrier 24, so that the aperture device 40 can be indirectly fixed to the optical lens 10.

[0059] As described above, the aperture device 40 is fixed to the optical lens 10, and when the lens driving device 20 drives the movement of the optical lens 10, the aperture device 40 also needs to be driven to move, which increases the driving force requirement of the lens driving device 20. At the same time, it is also necessary to consider how the aperture conductive part 47 of the aperture device 40 conducts electricity without affecting the normal operation of other functions of the camera module 1, for example, avoiding affecting the movement of the optical lens 10 driven by the lens driving device 20 due to the arrangement of the aperture conductive part 47.

[0060] To solve at least one of the above problems, the application provides an optimized lens driving device 20. The lens driving device 20 of the application can drive the optical lens 10 to move along the optical axis direction to adjust the distance between the optical lens 10 and the photosensitive device 30, so as to realize the focusing function; the lens driving device 20 can drive the optical lens 10 to move along the direction perpendicular to the optical axis, so that the optical lens 10 translates relative to the photosensitive device 30, thereby realizing the anti-shake function.

[0061] As Figures 1 to 9As shown, the lens driving device 20 comprises a base 22, a frame 23, a carrier 24 and a lens driving assembly 25. The carrier 24 is configured to carry the optical lens 10, the carrier 24 is movably arranged in the frame 23, and the lens driving assembly 25 drives the carrier 24 to move relative to the frame 23 along a first direction, so that the carrier 24 and the optical lens 10 fixed on the carrier 24 can move along the first direction under the driving of the lens driving assembly 25. For example, the optical lens 10 can be fixed on the carrier 24 by means of bonding medium, welding or by means of one-piece forming the lens barrel 12 of the optical lens 10 and the carrier 24, which is not limited in the present application. The frame 23 is movably arranged in the base 22, and the lens driving assembly 25 drives the frame 23 to move relative to the base 22 along a second direction perpendicular to the first direction, so that the frame 23 and the carrier 24 arranged in the frame 23 can move along the second direction perpendicular to the first direction under the driving of the lens driving assembly 25. It can be understood that, since the carrier 24 is arranged in the frame 23, when the frame 23 moves relative to the base 22 along the second direction, the carrier 24 and the optical lens 10 also move along the second direction with the frame 23. In one example, the first direction is parallel to the optical axis of the optical lens 10, and the movement of the optical lens 10 along the first direction can realize the focusing function of the camera module; the second direction is perpendicular to the direction of the optical axis of the optical lens 10, and the movement of the frame 23, the carrier 24 and the optical lens 10 along the second direction can realize the anti-shake function of the camera module.

[0062] It can be understood that the base 22 is a stator part of the lens driving device 20, and when the lens driving device 20 drives the optical lens 10 to move, the base 22 as the stator part remains relatively fixed, and other components and the optical lens 10 move relative to the base 22. In one example, the base 22 is fixed to the photosensitive device 30, so that the lens driving device 20 is fixed to the photosensitive device 30 through the base 22. For example, the base 22 can be fixed to the chip circuit board 312 of the photosensitive assembly 31 to be directly fixed to the photosensitive assembly 31; the base 22 can also be fixed to the filter support 322 to be indirectly fixed to the photosensitive assembly 31.

[0063] In one example, the carrier 24 has a carrier through hole 246, the frame 23 has a frame through hole 235, and the base 22 has a base through hole 226. The optical lens 10 is accommodated in the carrier through hole 246 of the carrier 24, and then the imaging light can pass through the carrier through hole 246, the frame through hole 235 and the base through hole 226 to reach the photosensitive device 30. It should be understood that the carrier 24, the frame 23 and the base 22 do not have through holes, and the imaging light can also pass through the carrier 24, the frame 23 and the base 22, for example, the carrier 24, the frame 23 and the base 22 are not formed in the light path of the imaging light, so as not to block the passage of the imaging light. In one example, the carrier 24 is formed on part of the side surface of the optical lens 10, the frame 23 is formed outside part of the side surface of the carrier 24, and the base 22 is formed below part of the bottom surface of the frame 23, so that the carrier 24, the frame 23 and the base 22 do not form corresponding through holes and do not block the passage of the imaging light.

[0064] In one example, the lens driving device 20 further comprises a focusing support part 262, a focusing magnetic attraction part 261, a shakeproof support part 264 and a shakeproof magnetic attraction part 263. The focusing support part 262 is arranged between the carrier 24 and the frame 23 along the first direction, and the focusing magnetic attraction part 261 is used to attract the carrier 24 to the frame 23 to make the carrier 24 and the frame 23 clamp the focusing support part 262, so that the carrier 24 is supported on the side surface of the frame 23 close to the optical axis through the focusing support part 262. The focusing support part 262 is clamped between the carrier 24 and the frame 23, and the focusing support part 262 moves in the form of sliding friction or rolling friction relative to at least one of the carrier 24 and the frame 23, so that the carrier 24 can move along the first direction relative to the frame 23 with small frictional resistance. The shakeproof support part 264 is arranged between the frame 23 and the base 22 along the second direction, and the shakeproof magnetic attraction part 263 is used to attract the frame 23 to the base 22 to make the frame 23 and the base 22 clamp the shakeproof support part 264, so that the frame 23 is supported on the top surface of the base 22 through the shakeproof support part 264. Here, the top surface of the base 22 refers to the surface facing the object side. The shakeproof support part 264 is clamped between the frame 23 and the base 22, and the shakeproof support part 264 moves in the form of sliding friction or rolling friction relative to at least one of the frame 23 and the base 22, so that the frame 23 can move along the second direction relative to the base 22 with small frictional resistance.

[0065] In one example, the lens driving device 20 further comprises a position sensing assembly, which is communicatively connected with the lens driving assembly 25, and is used to obtain position information of the carrier 24 and the optical lens 10 fixed to the carrier 24, so as to control the carrier 24 and the optical lens 10 to move along the first direction and / or the second direction.

[0066] In one example, the lens driving device 20 further comprises a driving conductive assembly 27, which is used to electrically connect each electrical component in the camera module 1. Specifically, the driving conductive assembly 27 is electrically connected to the lens driving assembly 25 and the position sensing assembly in the lens driving device 20. Further, the driving conductive assembly 27 can also be electrically connected to the aperture device 40 and the photosensitive device 30, so that the aperture device 40 and the lens driving device 20 can be electrically connected to the photosensitive device 30 through the driving conductive assembly 27 and to the external electronic equipment through the chip circuit board 312 of the photosensitive device 30.

[0067] In one example, the lens driving device 20 further comprises a cover 21 fixed to the base 22. The cover 21 and the base 22 are buckled to each other to form a receiving cavity for accommodating the frame 23, the carrier 24, the lens driving assembly 25, the focusing support part 262, the focusing magnetic attraction part 261, the anti-shake support part 264, the anti-shake magnetic attraction part 263, the position sensing assembly, and the driving conductive assembly 27, etc. On the one hand, this can avoid dust from entering, and on the other hand, it can avoid damage to each component when impacted. It should be understood that the cover 21 has a cover through hole 211, so that the optical lens 10 can extend out of the cover 21 through the cover through hole 211.

[0068] Further, the specific structure and position of each component are described to more clearly describe the advantages of the lens driving device 20 of the present application.

[0069] Specifically, the lens driving assembly 25 comprises a driving magnet portion 252 and a pair of focusing coil portions 251 and an anti-shake coil portion 253 respectively arranged opposite to the driving magnet portion 252. The driving magnet portion 252 is arranged on the frame 23, the focusing coil portions 251 are arranged on the carrier 24 and arranged opposite to the driving magnet portion 252. When the focusing coil portions 251 generate magnetic field under the excitation of electric current, the focusing coil portions 251 and the carrier 24 fixed with the focusing coil portions 251 move the driving magnet portion 252 and the frame 23 fixed with the driving magnet portion 252 along a first direction (optical axis direction) to realize the optical focusing function. The anti-shake coil portion 253 is arranged on the base 22 and arranged opposite to the driving magnet portion 252. When the anti-shake coil portion 253 generates magnetic field under the excitation of electric current, the driving magnet portion 252 and the frame 23 fixed with the driving magnet portion 252 move the anti-shake coil portion 253 and the base 22 fixed with the anti-shake coil portion 253 along a second direction perpendicular to the first direction to realize the optical anti-shake function. That is, the lens driving assembly 25 is configured to drive the carrier 24 to move relative to the base 22 along the first direction and the second direction perpendicular to the first direction. It should be understood that the focusing coil portions 251 and the anti-shake coil portion 253 can also be combined and referred to as a driving coil portion. In other words, the lens driving assembly 25 comprises the driving magnet portion 252 and the driving coil portion arranged opposite to the driving magnet portion 252, and the driving coil portion comprises the focusing coil portions 251 for the focusing function and the anti-shake coil portion 253 for the anti-shake function.

[0070] More specifically, in one example, the driving magnet portion 252 includes three driving magnets, a first driving magnet 2521, a second driving magnet 2522 and a third driving magnet 2523, the focus coil portion 251 includes a focus coil 2511 disposed opposite to the first driving magnet 2521 along the second direction, and the anti-shake coil portion 253 includes three anti-shake coils, a first anti-shake coil 2531, a second anti-shake coil 2532 and a third anti-shake coil 2533, respectively disposed opposite to the first driving magnet 2521, the second driving magnet 2522 and the third driving magnet 2523 along the first direction, wherein the first anti-shake coil 2531 is disposed opposite to the first driving magnet 2521 along the first direction, the second anti-shake coil 2532 is disposed opposite to the second driving magnet 2522 along the first direction, and the third anti-shake coil 2533 is disposed opposite to the third driving magnet 2523 along the first direction. Further, the second driving magnet 2522 and the third driving magnet 2523 are disposed at two sides of the first driving magnet 2521, and correspondingly, the second anti-shake coil 2532 and the third anti-shake coil 2533 are disposed at two sides of the first anti-shake coil 2531. It should be understood that in other examples of the present application, the number of focus coils, driving magnets and anti-shake coils can be more or less, for example, in one example, the third driving magnet 2523 and the third anti-shake coil 2533 are not included.

[0071] Next, for the convenience of description, the side of the lens driving device 20 where the first driving magnet 2521 is disposed is defined as the first side 51, and the four sides of the lens driving device 20 are defined as the first side 51, the second side 52, the third side 53 and the fourth side 54 in the clockwise direction. The focus coil 2511, the first driving magnet 2521 and the first anti-shake coil 2531 are disposed on the first side 51 of the lens driving device 20, the second driving magnet 2522 and the second anti-shake coil 2532 are disposed on the second side 52 of the lens driving device 20, the third driving magnet 2523 and the third anti-shake coil 2533 are disposed on the fourth side 54 of the lens driving device 20, and the third side 53 of the lens driving device 20 is not provided with the driving magnet portion 252, the focus coil portion 251 or the anti-shake coil portion 253. That is, in one example of the present application, the focus coil portion 251 is disposed on only one side of the lens driving device 20, and the anti-shake coil portion 253 and the driving magnet portion 252 are disposed on only three sides of the lens driving device 20.

[0072] Correspondingly, the carrier 24 includes four interconnected carrier side portions, namely a first carrier side portion 241, a second carrier side portion 242, a third carrier side portion 243 and a fourth carrier side portion 244. The first carrier side portion 241, the second carrier side portion 242, the third carrier side portion 243 and the fourth carrier side portion 244 are arranged on the first side 51, the second side 52, the third side 53 and the fourth side 54 of the lens driving device 20 in a clockwise direction.

[0073] The carrier 24 also includes two winding posts 2411 formed on the first carrier side portion 241. The two winding posts 2411 are located at opposite ends of the top surface of the first carrier side portion 241. A focus coil 2511 is fixed to the outer side of the first carrier side portion 241. The axis of the focus coil 2511 is perpendicular to the optical axis. The two lead wires at both ends of the focus coil 2511 are respectively wound around the two winding posts 2411. It should be understood that the outer side of the first carrier side portion 241 refers to the side of the first carrier side portion 241 away from the optical axis.

[0074] The frame 23 includes four interconnected frame sides, namely a first frame side 231, a second frame side 232, a third frame side 233 and a fourth frame side 234. The first frame side 231, the second frame side 232, the third frame side 233 and the fourth frame side 234 are arranged on the first side 51, the second side 52, the third side 53 and the fourth side 54 of the lens driving device 20 in a clockwise direction, so that the first frame side 231 is relatively arranged on the outside of the first carrier side 241, the second frame side 232 is relatively arranged on the outside of the second carrier side 242, the third frame side 233 is relatively arranged on the outside of the third carrier side 243, and the fourth frame side 234 is relatively arranged on the outside of the fourth carrier side 244.

[0075] The first driving magnet 2521 is arranged on the first frame side 231, the second driving magnet 2522 is arranged on the second frame side 232, and the third driving magnet 2523 is arranged on the fourth frame side 234. In one specific example, the three driving magnets are arranged in three driving magnet grooves respectively, the first frame side 231 has a first driving magnet groove 2311, the second frame side 232 has a second driving magnet groove 2321, and the fourth frame side 234 has a third driving magnet groove 2341. The first driving magnet groove 2311 has an opening facing at least the carrier 24 and the base 22, and the first driving magnet 2521 is fixed in the first driving magnet groove 2311; the second driving magnet groove 2321 has an opening facing at least the base 22, and the second driving magnet 2522 is fixed in the second driving magnet groove 2321, and the third driving magnet 2523 is fixed in the third driving magnet groove 2341. Further, the frame 23 is located on the side of the carrier 24 away from the optical axis, in other words, the carrier 24 is located on the inner side of the frame 23, and the frame 23 is located on the outer side of the carrier 24. Correspondingly, the focusing coil 2511 is located on the inner side of the first driving magnet 2521, in other words, the focusing coil 2511 is located on the side of the first driving magnet 2521 close to the optical axis.

[0076] The base 22 includes a base body 221 and four extension columns 222 extending upward from four corners of the base body 221 respectively. The first anti-shake coil 2531 is arranged on the first side of the base body 221, the second anti-shake coil 2532 is arranged on the second side of the base body 221, and the third anti-shake coil 2533 is arranged on the fourth side of the base body 221. Further, the base body 221 is located on the lower side of the frame 23, in other words, the base body 221 is located on the side of the frame 23 close to the photosensitive device 30, that is, the base body 221 is located on the image side of the frame 23. Correspondingly, the anti-shake coil part 253 including the first anti-shake coil 2531, the second anti-shake coil 2532 and the third anti-shake coil 2533 is located on the lower side (image side) of the driving magnet part 252 including the first driving magnet 2521, the second driving magnet 2522 and the third driving magnet 2523. Correspondingly, the axis direction of the winding of the first anti-shake coil 2531, the second anti-shake coil 2532 and the third anti-shake coil 2533 is parallel to the optical axis.

[0077] Here, when the first anti-shake coil 2531 generates a magnetic field under the excitation of current, the first driving magnet 2521 and the frame 23 are driven to move relative to the first anti-shake coil 2531 and the base 22 along a first anti-shake direction, which is perpendicular to the first direction. When the second anti-shake coil 2532 and the third anti-shake coil 2533 generate a magnetic field under the excitation of current, the second driving magnet 2522, the third driving magnet 2523 and the frame 23 are driven to move relative to the base 22 along a second anti-shake direction, which is perpendicular to the first anti-shake direction and the first direction. In this way, by the magnetic force between the first anti-shake coil 2531 and the first driving magnet 2521, the magnetic force between the second anti-shake coil 2532 and the second driving magnet 2522, and the magnetic force between the third anti-shake coil 2533 and the third driving magnet 2523, the base 22 is driven to move relative to the frame 23 in any direction perpendicular to the first direction (the optical axis direction), so as to realize the optical anti-shake function. It should be understood that the first anti-shake direction and the second anti-shake direction are two directions in the second direction perpendicular to the first direction, and the second direction is synthesized under the action of the first anti-shake direction and the second anti-shake direction with different sizes, for example, when the first anti-shake coil 2531 is not powered, the first anti-shake coil 2531 and the first driving magnet 2521 do not generate the force to drive the frame 23 to move along the first anti-shake direction, and the second anti-shake coil 2532 and the third anti-shake coil 2533 are powered and generate the force to drive the frame 23 to move along the second anti-shake direction between the second driving magnet 2522 and the third driving magnet 2523, respectively. The second direction is in the same direction as the second anti-shake direction.

[0078] It is worth mentioning that in the technical solution of the present application, the first driving magnet 2521 in the driving magnet part 252 is multiplexed, and the first driving magnet 2521 is used to interact with the focusing coil 2511 in the process of realizing the focusing function, and is also used to interact with the first anti-shake coil 2531 part 253 in the process of realizing the anti-shake function, so that the structure design of the lens driving device 20 is intensive and miniaturized. It is worth mentioning that since the first driving magnet 2521 is shared in optical focusing and optical anti-shake, the first driving magnet 2521 has a large size in the optical axis direction, that is, in the direction of the optical axis, the size of the first driving magnet 2521 is greater than the size of the second driving magnet 2522 and the size of the third driving magnet 2523. In other words, the bottom surface of the first driving magnet 2521 is flush with the bottom surface of the second driving magnet 2522 and the bottom surface of the third driving magnet 2523, and the top surface of the first driving magnet 2521 is higher than the top surface of the second driving magnet 2522 and the top surface of the third driving magnet 2523. In one example, the height of the second driving magnet 2522 and the third driving magnet 2523 is equal.

[0079] It is worth mentioning that the first driving magnet 2521 is a multi-pole magnet (for example, a four-pole magnet) because it needs to be used for optical focusing and optical anti-shake at the same time, which can be formed by multi-pole magnetization at one time or by fixing multiple two-pole magnets. The second driving magnet 2522 and the third driving magnet 2523 can be multi-pole magnets or two-pole magnets. It should be understood that in the present application, a two-pole magnet refers to a magnet including only one N pole and one S pole, and a multi-pole magnet refers to a magnet including two or more N poles and two or more S poles.

[0080] Further, in one example of the present application, the frame 23 can further include a first magnetic guide, a second magnetic guide, and a third magnetic guide (not shown in the drawings), wherein the first magnetic guide, the second magnetic guide, and the third magnetic guide can be fixed to the first frame side 231, the second frame side 232, and the third frame side 233, respectively, by processes such as insert molding. Specifically, the first magnetic guide is arranged on the side of the first driving magnet 2521 away from the focusing coil 2511 and the side of the first anti-shake coil 2531, so as to enhance the magnetic field strength on the side of the first driving magnet 2521 facing the focusing coil 2511 and the side of the first driving magnet 2521 facing the first anti-shake coil 2531; the second magnetic guide is arranged on the side of the second driving magnet 2522 away from the second anti-shake coil 2532, so as to enhance the magnetic field strength on the side of the second driving magnet 2522 facing the second anti-shake coil 2532; and the third magnetic guide is arranged on the side of the third driving magnet 2523 away from the third anti-shake coil 2533, so as to enhance the magnetic field strength on the side of the third driving magnet 2523 facing the third anti-shake coil 2533. The second magnetic guide and the third magnetic guide are arranged on both sides of the first magnetic guide, and the second magnetic guide and the third magnetic guide can respectively extend integrally with both ends of the first magnetic guide. It should be understood that the three magnetic guides are composed of a material with magnetic conductive properties (for example, stainless steel), and arranging the three magnetic guides in the frame 23 can also enhance the structural strength of the frame 23.

[0081] Further, to keep the carrier 24 moving in the frame 23 with less friction resistance, the focusing support 262 is arranged between the carrier 24 and the frame 23 in the first direction, the carrier 24 is supported by the focusing support 262 on the frame 23, the focusing support 262 provides a fixed size air gap between the carrier 24 and the frame 23, so that when the carrier 24 moves relative to the frame 23 in the first direction, the contact and friction between the carrier 24 and the frame 23 are avoided, and the carrier 24 is movably supported on the frame 23. During the movement of the carrier 24 relative to the frame 23, the focusing support 262 can always support the carrier 24, and the focusing support 262 is not easy to deform, so that the carrier 24 can move smoothly. Specifically, the focusing support 262 is arranged between the first carrier side 241 and the first frame side 231.

[0082] In one example, the focusing support 262 is implemented as a ball. The focusing support 262 includes at least three focusing balls 2621 clamped between the first carrier side 241 of the carrier 24 and the first frame side 231 of the frame 23. Specifically, the side of the first carrier side 241 facing the first frame side 231 is formed with two inner support grooves 2412 located on both sides of the first driving magnet 2521, and the side of the first frame side 231 facing the first carrier side 241 is formed with two outer support grooves 2312 located on both sides of the focusing coil 2511, the positions of the two inner support grooves 2412 and the two outer support grooves 2312 are correspondingly arranged, and the at least three focusing balls 2621 are arranged in the two inner support grooves 2412 and the two outer support grooves 2312, and the focusing balls 2621 have at least three contact points with the inner support grooves 2412 and the outer support grooves 2312. In one specific example, the number of focusing balls 2621 is implemented as four, wherein two focusing balls 2621 are arranged between one set of inner support grooves 2412 and outer support grooves 2312, and the other two focusing balls 2621 are arranged between another set of inner support grooves 2412 and outer support grooves 2312.

[0083] More specifically, the top surface of one of the inner support grooves 2412 and the outer support grooves 2312 is formed with a first ball stop, and the bottom surface of the other is formed with a second ball stop, and through the arrangement of the first ball stop and the second ball stop, the focusing balls 2621 are prevented from escaping from the inner support grooves 2412 and the outer support grooves 2312. Due to the movement of the carrier 24 relative to the frame 23, the height dimension of the carrier 24 is smaller than the height dimension of the frame 23, the top surface of the inner support groove 2412 is formed with a first ball stop 2413, and the bottom surface of the outer support groove 2312 is formed with a second ball stop 2313, so that the focusing balls 2621 are limited between the inner support grooves 2412 and the outer support grooves 2312.

[0084] It should be appreciated that the focusing support 262 can also be implemented in other structures in the present application. For example, the focusing support 262 can be implemented as two guide rods clamped between the two inner support grooves 2412 of the first carrier side 241 and the two outer support grooves 2312 of the first frame side 231, respectively; the focusing support 262 can also be implemented as two groups of sliders fixed to the first carrier side 241 or the first frame side 231 to be in sliding contact with the outer support grooves 2312 of the first frame side 231 or the inner support grooves 2412 of the first carrier side 241, where the sliders can be integrally formed with the first carrier side 241 or the first frame side 231 or separately formed and then fixed by glue.

[0085] To ensure that the carrier 24 can be supported by the focusing support 262 on the frame 23, the focusing magnetic attraction part 261 is fixed to the first carrier side 241 of the carrier 24 and arranged opposite to the first driving magnet 2521, and a magnetic attraction force is generated between the focusing magnetic attraction part 261 and the first driving magnet 2521 to clamp the focusing support 262 between the frame 23 and the carrier 24. Specifically, the focusing magnetic attraction part 261 includes a pair of focusing magnetic attraction members 2611 made of a material suitable for generating a magnetic attraction force with a magnet, for example, the focusing magnetic attraction members 2611 can be made of iron, nickel, cobalt or other materials that can be attracted by a magnet, or the focusing magnetic attraction members 2611 can be directly made of a magnet.

[0086] The focusing magnetic attraction members 2611 are arranged on the side of the focusing coil 2511 away from the first driving magnet 2521, and the focusing coil 2511 is arranged between the focusing magnetic attraction members 2611 and the first driving magnet 2521. The focusing magnetic attraction members 2611 can be embedded in the first carrier side 241 by insert molding process, or can be fixed to the first carrier side 241 by adhesive or welding.

[0087] Similarly, to keep the frame 23 movable in the base 22 with small frictional resistance, the anti-shake support 264 is arranged between the frame 23 and the base 22 in the second direction, the frame 23 is supported by the anti-shake support 264 on the base 22, the anti-shake support 264 provides a fixed size air gap between the frame 23 and the carrier 24, so that when the frame 23 moves relative to the carrier 24 in the second direction, the frame 23 and the base 22 are prevented from contacting and generating friction, and the frame 23 is movably supported on the base 22. During the movement of the frame 23 relative to the base 22, the anti-shake support 264 can always support the frame 23, and the anti-shake support 264 is not easy to deform, so that the frame 23 can move smoothly. Specifically, the anti-shake support 264 is arranged between the bottom surface of the frame 23 and the top surface of the base main body 221.

[0088] In one example, the anti-shake support portion 264 is implemented as a ball. The anti-shake support portion 264 includes at least three anti-shake balls 2641 clamped between the frame 23 and the base body 221. Correspondingly, the bottom surface of the frame 23 facing the base 22 is formed with at least three upper support grooves, the top surface of the base body 221 facing the carrier 24 is formed with at least three lower support grooves, the at least three upper support grooves and the at least three lower support grooves correspond to each other, and the at least three anti-shake balls 2641 are respectively arranged in the at least three upper support grooves and the at least three lower support grooves.

[0089] In one specific example, the number of anti-shake balls 2641 is implemented as three, the anti-shake support portion 264 includes three anti-shake balls 2641, the bottom surface of the frame 23 is formed with a first upper support groove 2332, a second upper support groove 2323 and a third upper support groove 2343, and the top surface of the base body 221 is formed with a first lower support groove 223, a second lower support groove 224 and a third lower support groove 225. The first upper support groove 2332 and the first lower support groove 223 are correspondingly arranged, the second upper support groove 2323 and the second lower support groove 224 are correspondingly arranged, the third upper support groove 2343 and the third lower support groove 225 are correspondingly arranged, and the three anti-shake balls 2641 are respectively arranged between the three upper support grooves and the three lower support grooves. The three anti-shake balls 2641 form a support plane to support the frame 23, in order to improve the stability of the support of the frame 23, the distance between the three anti-shake balls 2641 is set to be large so as to provide a larger support plane. Specifically, considering that the third frame side portion 233 is not provided with a driving magnet, the first upper support groove 2332 is arranged at the middle of the bottom surface of the third frame side portion 233, the second upper support groove 2323 is arranged at the bottom surface of the second frame side portion 232 close to one side of the first frame side portion 231, the third upper support groove 2343 is arranged at the bottom surface of the fourth frame side portion 234 close to one side of the first frame side portion 231, and the three anti-shake balls 2641 are arranged in a substantially isosceles triangle shape between the frame 23 and the base body 221.

[0090] It should be understood that in the present application, the anti-shake support portion 264 can also be implemented as other structures. For example, the anti-shake support portion 264 can be implemented as at least three sliders fixed to the bottom surface of the frame 23 or the top surface of the base body 221 so as to be in sliding contact with the base 22 or the frame 23. Here, the sliders can be integrally formed with the frame 23 or the base 22, or can be separately formed and then fixed by glue.

[0091] To ensure that the frame 23 can be supported on the base 22 by the anti-shake support part 264, the anti-shake magnetic attraction part 263 is fixed to the base body 221 and arranged opposite the driving magnet part 252, and the anti-shake magnetic attraction part 263 and the driving magnet part 252 are magnetically attracted to each other to generate a magnetic attraction force to clamp the anti-shake support part 264 between the frame 23 and the base 22. Specifically, the anti-shake magnetic attraction part 263 includes four anti-shake magnetic attraction pieces 2631, 2632, 2633, and 2634, which are made of a material suitable for magnetic attraction with a magnet, for example, the four anti-shake magnetic attraction pieces can be made of iron, nickel, cobalt, or other materials that can be attracted by a magnet, and the four anti-shake magnetic attraction pieces can also be made directly of a magnet.

[0092] The four anti-shake magnetic attraction pieces are respectively arranged on the side of the anti-shake coil part 253 away from the driving magnet part 252, and the anti-shake coil part 253 is arranged between the driving magnet part 252 and the four anti-shake magnetic attraction pieces. Specifically, the four anti-shake magnetic attraction pieces are respectively arranged at the four corners of the base body 221, so that the frame 23 can be balanced and stably supported in the base 22. Among them, the four anti-shake magnetic attraction pieces can be embedded in the base body 221 by insert molding process, or can be fixed to the base body 221 by adhesive or welding.

[0093] It should be understood that the number of anti-shake magnetic attraction pieces can also be three or more, for example, when the anti-shake magnetic attraction pieces are implemented as three, the three anti-shake magnetic attraction pieces are respectively arranged on the side of the first anti-shake coil 2531, the second anti-shake coil 2532, and the third anti-shake coil 2533 away from the first driving magnet 2521, the second driving magnet 2522, and the third driving magnet 2523.

[0094] It is worth mentioning that when designing the anti-shake support part 264 and the anti-shake magnetic attraction part 263, it is necessary to consider that the setting of the anti-shake support part 264 and the anti-shake magnetic attraction part 263 may cause the problem of the inclination of the frame 23 relative to the base 22. When the magnetic attraction force action point of the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 is located outside the support plane formed by the at least three anti-shake balls 2641 included in the anti-shake support part 264, under the action of the magnetic attraction force, the frame 23 has the risk of inclination relative to the base 22. However, even if the magnetic attraction force action point of the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 is located inside the support plane formed by the at least three anti-shake balls 2641 included in the anti-shake support part 264, it is still necessary to further consider the problem of the inclination of the frame 23 relative to the base 22 due to the gravity of the frame 23 and other camera module components supported by the frame 23 when the camera module 1 is in an inclined state. Specifically, when the gravity direction of the camera module 1 is not consistent (parallel) with the optical axis direction of the camera module 1 (i.e., when the gravity direction of the camera module 1 intersects with the optical axis direction of the camera module 1 at a certain angle), the component of the gravity of the frame 23 and other camera module components supported by the frame 23 in the vertical optical axis direction may cause the frame 23 to rotate relative to the base 22. In other words, if the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 has a small effect on inhibiting the rotation of the frame 23, it is difficult to avoid the inclination problem of the frame 23. Therefore, in order to avoid the occurrence of this problem, the design of the anti-shake support part 264 and the anti-shake magnetic attraction part 263 can be further optimized.

[0095] It should be understood that the anti-shake magnetic attraction part 263 includes a plurality of anti-shake magnetic attraction members arranged in a scattered manner, and accordingly, the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 refers to the resultant force of the magnetic attraction forces of the plurality of anti-shake magnetic attraction members, and the magnetic attraction force action point of the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 refers to the magnetic attraction force action point of the resultant force of the magnetic attraction forces of the plurality of anti-shake magnetic attraction members. In addition, the other camera module components supported by the frame 23 can include the driving magnet part 252, the focusing support part 262, the carrier 24, the focusing magnetic attraction part 261, the optical lens 10, the aperture device 40, the driving conductive assembly 27, and the focusing position sensing assembly 28, etc. fixed to the frame 23.

[0096] Specifically, since the frame 23 is supported to the base 22 by the at least three anti-shake balls 2641 included in the anti-shake support part 264, any two anti-shake balls 2641 among the at least three anti-shake balls 2641 can form a bearing shaft of the rotation of the frame 23 relative to the base 22, and then the frame 23 can rotate relative to the base 22. When the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 acts on the bearing shaft, the distance between the magnetic attraction force point of the magnetic attraction force and the bearing shaft is 0, and it is difficult to generate the function of inhibiting the rotation of the frame 23. In other words, when the magnetic attraction force point of the magnetic attraction force is located on the bearing shaft, the distance between the magnetic attraction force point of the magnetic attraction force and the bearing shaft is 0, the torque of the magnetic attraction force on the frame 23 is 0, the center of gravity of the gravity of the frame 23 and other camera module components supported by the frame 23 is located in the object side direction of the bearing shaft, the distance between the gravity point of the gravity and the bearing shaft is greater than 0, and the torque of the gravity of the frame 23 and other camera module components supported by the frame 23 on the frame 23 is greater than 0. Therefore, when the gravity direction of the camera module 1 is not consistent with the optical axis direction of the camera module 1, the frame 23 will inevitably rotate relative to the base 22, and the inclination problem will occur.

[0097] However, when the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 deviates from the bearing shaft, but the magnetic attraction force point of the magnetic attraction force is close to the bearing shaft, or when the magnetic attraction force is small, the torque of the magnetic attraction force on the frame 23 is also small. Therefore, the torque of the magnetic attraction force on the frame 23 is smaller than the torque of the gravity of the frame 23 and other camera module components supported by the frame 23 on the frame 23, and the frame 23 can still rotate relative to the base 22.

[0098] In summary, when the magnetic attraction force point of the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 is located on the line connecting any two anti-shake balls 2641 among the at least three anti-shake balls 2641, the torque of the magnetic attraction force on the frame 23 is 0, and when the gravity of the frame 23 and other camera module components supported by the frame 23 intersects with the optical axis of the camera module at a certain angle, the frame 23 can rotate relative to the base 22 under the influence of the gravity. Therefore, the magnetic attraction force point cannot be located on the line connecting any two anti-shake balls 2641 among the at least three anti-shake balls 2641. Secondly, even if the magnetic attraction force point is not on the line connecting any two anti-shake balls 2641 among the at least three anti-shake balls 2641, the magnetic attraction force is too small or the vertical distance between the magnetic attraction force point and the line connecting any two anti-shake balls 2641 is too short, which will make the torque of the magnetic attraction force on the frame 23 too small, and it is difficult to resist the rotating effect of the gravity. Therefore, the torque of the magnetic attraction force cannot be too small.

[0099] Correspondingly, to reduce the risk of tilting of the frame 23 relative to the base 22, the magnetic attraction force action point between the anti-shake magnetic attraction part 263 and the driving magnet part 252 is arranged in the support plane of the anti-shake support part 264, and the magnetic attraction force action point between the anti-shake magnetic attraction part 263 and the driving magnet part 252 is not on the line of any two anti-shake balls 2641 in the anti-shake support part 264 (at least three anti-shake balls 2641), and the magnetic attraction force action point deviates from the line of any two anti-shake balls 2641. Further, taking any two anti-shake balls 2641 in the anti-shake support part 264 (at least three anti-shake balls 2641) as the supporting shaft, the torque of the magnetic attraction force between the anti-shake magnetic attraction part 263 and the driving magnet part 252 on the frame is greater than the torque of the gravity of the frame 23 and other camera module components supported by the frame 23 on the frame 23. In this regard, the position of the magnetic attraction force action point of the magnetic attraction force generated by the anti-shake magnetic attraction part 263 can be changed by adjusting the direction or size of the magnetic attraction force respectively generated by the plurality of anti-shake magnetic attraction parts in the anti-shake magnetic attraction part 263, or the position of the at least three anti-shake balls 2641 included in the anti-shake support part 264 can also be adjusted to reduce the risk of tilting of the frame 23 relative to the base 22. Among them, adjusting the direction or size of the magnetic attraction force respectively generated by the plurality of anti-shake magnetic attraction parts in the anti-shake magnetic attraction part 263 can be realized by changing the position or size of each anti-shake magnetic attraction part, and in one example, the plurality of anti-shake magnetic attraction parts in the anti-shake magnetic attraction part 263 are asymmetrically arranged.

[0100] It should be understood that a large number of anti-shake balls 2641 can provide more support points for the frame 23. However, due to manufacturing tolerances, it's difficult to maintain perfect consistency in the dimensions of the multiple anti-shake balls 2641. In actual products, only three of the anti-shake balls 2641 that are not aligned form a support plane to support the frame 23. Therefore, reducing the number of anti-shake balls 2641 can reduce the risk of the magnetic attraction between the anti-shake magnetic portion 263 and the driving magnet portion 252 acting close to the line connecting any two anti-shake balls 2641. For example, the number of anti-shake balls 2641 in the anti-shake support portion 264 can be set to three. However, this reduced number of anti-shake balls 2641 reduces the overall support area of ​​the anti-shake support portion 264 for the frame. When the camera module 1 is disturbed by external forces and the frame 23 tilts relative to the base 22, the frame 23 has a larger rotational angle relative to the base 22, which increases the risk of damage to the frame 23 and other camera module components supported by the frame 23. Therefore, in one example, two support portions smaller than the anti-shake ball 2641 may be further provided on either side of the anti-shake ball 2641 disposed between the third frame side portion 233 and the base 22, thereby preventing the frame 23 from rotating at a large angle relative to the base 22. The two support portions may be fixed to the third frame side portion 233 or the base 22, or they may be movably disposed between the third frame side portion 233 or the base 22.

[0101] In another example of the present application, at least three anti-shake balls 2641 are disposed only on three sides of the lens driving device 20. For example, when the anti-shake support portion 264 includes four anti-shake balls 2641, two anti-shake balls 2641 are disposed between the second frame side portion 232 and the base 22 and between the fourth frame side portion 234 and the base 22, and the other two anti-shake balls 2641 are disposed between the third frame side portion 233 and the base 22. Thus, the four anti-shake balls 2641 are disposed in a trapezoidal shape between the frame 23 and the base 22. Preferably, the four anti-shake balls 2641 are disposed in an isosceles trapezoidal shape between the frame 23 and the base 22.

[0102] More specifically, refer to Figure 10 As shown in the figure, A, B, C, and D respectively illustrate four anti-shake balls arranged in an isosceles trapezoid shape. The four anti-shake balls A, B, C, and D form the support plane of the anti-shake support part 264. Point O is the optical axis, and point M is the magnetic attraction point of the magnetic attraction between the anti-shake magnetic attraction part 263 and the driving magnet part 252. The magnetic attraction point M is located in the support plane of the anti-shake support part 264. The vertical distance L1 between the magnetic attraction point M and the bearing axis formed by the anti-shake balls A and C is the shortest. Figure 10In the example shown, with the anti-shake balls A and C as the supporting axes, the torque exerted on the frame by the magnetic attraction force between the anti-shake magnetic part 263 and the driving magnet part 252 should be greater than the torque exerted on the frame 23 by the gravity of the frame 23 and other camera module components supported by the frame 23.

[0103] Furthermore, the position sensing assembly is used to obtain position information of the carrier 24, thereby obtaining position information of the optical lens 10 fixed to the carrier 24. Accordingly, the position sensing assembly includes a focus position sensing assembly 28 for obtaining position change information of the carrier 24 in a first direction and an anti-shake position sensing assembly 29 for obtaining position change information of the frame 23 in a second direction.

[0104] Furthermore, it should be understood that when the anti-shake support portion 264 is implemented as at least three anti-shake sliders, the same problems and solutions also exist, and this application will not elaborate further.

[0105] Specifically, refer to Figure 2 and Figure 5 As shown, the focus position sensing component 28 includes a focus position sensing element 281 and a focus position sensing magnet 282, and the focus position sensing element 281 and the focus position sensing magnet 282 are arranged on the third side of the lens driving device 20 along the first direction (optical axis direction), wherein the focus position sensing element 281 is arranged above the focus position sensing magnet 282. Specifically, the focus position sensing component 28 includes a focus position sensing element 281 and a focus position sensing magnet 282 arranged relative to each other along a first direction. The focus position sensing element 281 is fixed to the carrier 24 and electrically connected to the driving conductive component 27. The focus position sensing magnet 282 is fixed to the frame 23. When the carrier 24 moves relative to the frame 23 in the first direction, the focus position sensing element 281 moves away from the focus position sensing magnet 282 in the first direction, so that the magnetic field of the focus position sensing magnet 282 acting on the focus position sensing element 281 changes, and then the focus position sensing element 281 can obtain the position information change of the carrier 24 relative to the frame 23.

[0106] More specifically, the third carrier side portion 243 of the carrier 24 has a first side extension 2431 extending outward, the focus position sensing element 281 is fixed to the first side extension 2431, the third frame side portion 233 of the frame 23 has a sensing magnet slot 2331 opening towards the focus position sensing element 281, the focus position sensing magnet 282 is fixed in the sensing magnet slot 2331, so that the focus position sensing element 281 and the focus position sensing magnet 282 are oppositely arranged along the first direction. It should be appreciated that the focus position sensing element 281 can be arranged above the first side extension 2431, or below the first side extension 2431 or embedded in the first side extension 2431. Here, extending outward means extending in a direction away from the optical axis. It is worth mentioning that in the technical solution of the present application, the focus position sensing element 281 and the focus position sensing magnet 282 at least partially overlap along the first direction, that is, the projection of the focus position sensing element 281 at least partially falls within the projection of the focus position sensing magnet 282 along the first direction; the focus position sensing element 281 and the focus position sensing magnet 282 do not overlap along the second direction perpendicular to the first direction. In a specific example, the projection of the focus position sensing element 281 completely falls within the projection of the focus position sensing magnet 282 along the first direction, so that the focus position sensing element 281 can have better detection effect.

[0107] It is worth mentioning that in the technical solution of the present application, the opposite side of the first driving magnet 2521 is not provided with other driving magnets, and the focus position sensing magnet 282 is arranged on the opposite side of the first driving magnet 2521. Correspondingly, the focus position sensing assembly 28 and the driving magnet portion 252 are arranged on different sides of the lens driving device 20, and the focus position sensing magnet 282 is arranged on the third side 53 of the lens driving device 20 which is not provided with the driving magnet portion 252, so that the arrangement of the focus position sensing magnet 282 along the first direction is not limited by the driving magnet portion 252. Correspondingly, the bottom surface (image side surface) of the focus position sensing magnet 282 can be lower than the top surface (object side surface) of all the driving magnets in the driving magnet portion 252, in other words, the bottom surface of the focus position sensing magnet 282 is lower than the top surface of the second driving magnet 2522 and the third driving magnet 2523.

[0108] It is worth mentioning that in a specific example, one of the anti-shake balls 2641 and the focus position sensing magnet 282 at least partially overlap along the first direction. The anti-shake ball 2641 is actually arranged on the third frame side portion 233, that is, the anti-shake ball 2641 arranged on the third frame side portion 233 and the focus position sensing magnet 282 at least partially overlap along the first direction.

[0109] Referring to Figure 2 andFigure 3 As shown, the anti-shake position sensing assembly 29 includes a first anti-shake position sensing element 291 and a second anti-shake position sensing element 292. The first anti-shake position sensing element 291 is arranged below the first driving magnet 2521 for sensing the magnetic field change information of the first driving magnet 2521, and the second anti-shake position sensing element 292 is arranged below the second driving magnet 2522 or the third driving magnet 2523 for sensing the magnetic field change information of the second driving magnet 2522 or the third driving magnet 2523, thereby obtaining the position change information of the frame 23 in the second direction.

[0110] Specifically, the first anti-shake position sensing element 291 and the second anti-shake position sensing element 292 are respectively fixed to the two adjacent sides of the base body 221 and are respectively electrically connected with the driving conductive assembly 27. Among them, the first anti-shake position sensing element 291 is arranged below the first anti-shake coil 2531, and the second anti-shake position sensing element 292 is arranged below the second anti-shake coil 2532 or the third anti-shake coil 2533. For example, the base body 221 is provided with a groove corresponding to the position where the first anti-shake position sensing element 291 and the second anti-shake position sensing element 292 are arranged, and the first anti-shake position sensing element 291 and the second anti-shake position sensing element 292 are respectively accommodated in the two grooves.

[0111] It should be understood that in the technical solution of the present application, any one of the focusing position sensing element 281, the first anti-shake position sensing element 291 and the second anti-shake position sensing element 292 can be implemented as a Hall element, a driver IC, a TMR or other elements that can sense a magnetic field.

[0112] Further, the driving conductive assembly 27 is used to electrically connect the lens driving assembly 25 and the position sensing assembly in the lens driving device 20 and electrically connect the lens driving device 20 and the photosensitive device 30, so that the lens driving device 20 can obtain driving power and control signals through the photosensitive device 30, and the lens driving assembly 25 can obtain control signals of the position sensing assembly. And when the camera module 1 further includes an aperture device 40, the driving conductive assembly 27 is also used to electrically connect with the aperture device 40, and the aperture device 40 is also electrically connected with the photosensitive device 30 through the driving conductive assembly 27 arranged in the lens driving device 20 and further electrically connected with an external electronic device. Further combining Figure 7 and Figure 8 As shown, the driving conductive assembly 27 includes a carrier conductive part 271 arranged on the carrier 24, a base conductive part 273 arranged on the base 22, and a conductive connecting part 272 electrically connecting the carrier conductive part 271 and the base conductive part 273.

[0113] The carrier conductive part 271 includes a carrier circuit board 2711 and two coil conductive parts 2712 and 2713. The carrier circuit board 2711 is arranged on the first side extension 2431, the focus position sensing element 281 is fixed and electrically connected to the carrier circuit board 2711, and the two coil conductive parts are electrically connected to the focus coil 2511 and the carrier circuit board 2711. Specifically, the carrier circuit board 2711 can be fixed to the top of the first side extension 2431 by, for example, adhesive medium bonding, and the carrier circuit board 2711 is provided with a plurality of circuit board pads for electrical connection with other components; the two coil conductive parts can be fixed to the carrier 24 by insert molding, the first coil conductive part 2712 is located on the second side of the carrier 24 and extends from the first side to the third side of the carrier 24, and the second coil conductive part 2713 is located on the fourth side of the carrier 24 and extends from the first side to the third side of the carrier 24. The two connecting ends of the first coil conductive part 2712 are exposed to the top surface of the carrier 24 at the first side and the third side of the carrier 24, respectively, and the two connecting ends of the second coil conductive part 2713 are exposed to the top surface of the carrier 24 at the first side and the third side of the carrier 24, respectively, so that the connecting ends of the two coil conductive parts at the first side are electrically connected to the two lead wires wound on the two winding posts 2411 by the focus coil 2511, respectively, and the connecting ends of the two coil conductive parts at the third side are electrically connected to the two circuit board pads of the carrier circuit board 2711, respectively, so as to electrically connect the focus coil 2511 and the focus position sensing element 281, and further adjust the current direction and / or current size in the focus coil 2511 by the focus position sensing element 281 to control the movement of the carrier 24.

[0114] The base conductive part 273 includes a plurality of base conductive pieces 2731, and is fixed to the base 22 by insert molding to provide the base 22 with a conductive function. Only part of the base conductive part 273 is wrapped by the base 22, and the part of the base conductive part 273 extending towards the image side and protruding from the base 22 forms a plurality of pins for electrical connection with the chip circuit board 312 of the image pickup device 30; the part of the base conductive part 273 exposed to the object side from the base 22 forms a plurality of base pads, and the first anti-shake position sensing element 291, the second anti-shake position sensing element 292, the first anti-shake coil 2531, the second anti-shake coil 2532, and the third anti-shake coil 2533 are respectively electrically connected to the plurality of base pads, so that the anti-shake coil part 253 is electrically connected to the first anti-shake position sensing element 291 and the second anti-shake position sensing element 292, and the first anti-shake position sensing element 291 and the second anti-shake position sensing element 292 can adjust the current direction and / or current size in the anti-shake coil part 253 to control the movement of the frame 23. It should be understood that the first anti-shake coil 2531, the second anti-shake coil 2532, and the third anti-shake coil 2533 of the anti-shake coil part 253 are electrically connected to the base conductive part 273.

[0115] It is worth mentioning that since at least part of the base conductive part 273 is also located below the drive magnet part 252, in order to avoid the base conductive part 273 adversely affecting the magnetic attraction function of the anti-shake magnetic attraction part 263, the base conductive part 273 and the anti-shake magnetic attraction part 263 are made of different materials, and the base conductive part 273 is made of a material that does not conduct magnetism, so as to avoid the generation of magnetic attraction force between the base conductive part 273 and the drive magnet part 252. Further, the lateral extension part of the anti-shake magnetic attraction part 263 and the base conductive part 273 has a certain height difference in the base 22, so as to reduce the probability of interference between the two and avoid the anti-shake magnetic attraction part 263 adversely affecting the conductive function of the base conductive part 273. For example, in one example, the anti-shake magnetic attraction part 263 is higher than the lateral extension part of the base conductive part 273, so as to make full use of the space in the base 22 and make the distance between the anti-shake magnetic attraction part 263 and the drive magnet part 252 closer.

[0116] The conductive connecting part 272 is used to electrically connect the carrier conductive part 271 and the base conductive part 273, so as to electrically connect the focusing coil 2511 and the focusing position sensing element 281 with the photosensitive device 30. The conductive connecting part 272 comprises four electric connecting parts, i.e., a first electric connecting part 2721, a second electric connecting part 2722, a third electric connecting part 2723 and a fourth electric connecting part 2724. The first electric connecting part 2721, the second electric connecting part 2722, the third electric connecting part 2723 and the fourth electric connecting part 2724 are respectively electrically connected with the base conductive part 273 and the carrier circuit board 2711. Specifically, the first electric connecting part 2721 comprises a first outer fixed end 27211, a first connecting wire 27212 and a first inner fixed end 27213, and the first connecting wire 27212 electrically connects the first outer fixed end 27211 and the first inner fixed end 27213; the second electric connecting part 2722 comprises a second outer fixed end 27221, a second connecting wire 27222 and a second inner fixed end 27223, and the second connecting wire 27222 electrically connects the second outer fixed end 27221 and the second inner fixed end 27223; the third electric connecting part 2723 comprises a third outer fixed end 27231, a third connecting wire 27232 and a third inner fixed end 27233, and the third connecting wire 27232 electrically connects the third outer fixed end 27231 and the third inner fixed end 27233; the fourth electric connecting part 2724 comprises a fourth outer fixed end 27241, a fourth connecting wire 27242 and a fourth inner fixed end 27243, and the fourth connecting wire 27242 electrically connects the fourth outer fixed end 27241 and the fourth inner fixed end 27243. The first outer fixed end 27211, the second outer fixed end 27221, the third outer fixed end 27231 and the fourth outer fixed end 27241 are respectively fixed on the object side of the base 22, and the first inner fixed end 27213, the second inner fixed end 27223, the third inner fixed end 27233 and the fourth inner fixed end 27243 are respectively fixed on the object side of the carrier 24, so as to realize the physical connection between the carrier 24 and the base 22, and further realize the circuit conduction between the carrier 24 and the base 22. It should be understood that the four inner fixed ends and the four outer fixed ends can be fixed on the carrier 24 and the base 22 by means of adhesion medium or hot riveting.

[0117] It is worth mentioning that the conduction of the conductive connecting part 272 enables the carrier conductive part 271 and the base conductive part 273 to realize the electrical conduction across the frame 23, and the focusing position sensing element 281 is arranged on the carrier 24 instead of the frame 23, so as to avoid arranging the circuit on the frame 23, and further simplify the overall structure of the lens driving device 20, and avoid the increase of the resistance of the frame 23 in the moving process due to the arrangement of the circuit. In other words, in the technical solution of the present application, the frame 23 does not have an electrical function and cannot conduct electricity.

[0118] Specifically, four of the plurality of base conductive members 2731 included in the base conductive part 273 extend upward along the four extension columns 222 at the four corners of the base body 221 respectively, and are exposed from the top surfaces of the four extension columns 222 respectively. The first outer fixed end 27211, the second outer fixed end 27221, the third outer fixed end 27231 and the fourth outer fixed end 27241 of the four electrical connecting members are fixed to the four extension columns 222 respectively and are electrically connected with the four base conductive members 2731 respectively. It should be understood that in the present application, the upward extension of the four base conductive members 2731 along the four extension columns 222 respectively can be in the form of being embedded in the four extension columns 222 respectively, or in the form of extending upward along the surfaces of the four extension columns 222 respectively.

[0119] The second carrier side part 242 of the carrier 24 has a second side extension part 2421 extending outward, and the fourth carrier side part 244 of the carrier 24 has a third side extension part 2441 extending outward, where the outward extension refers to the extension in the direction away from the optical axis. Correspondingly, the first inner fixed end 27213 is fixed to the second side extension part 2421 and electrically connected with the carrier circuit board 2711, for example, the first inner fixed end 27213 can be electrically connected with one circuit pad on the carrier circuit board 2711; the second inner fixed end 27223 is fixed to the first side extension part 2431 and electrically connected with the carrier circuit board 2711, for example, the second inner fixed end 27223 can be electrically connected with one circuit pad on the carrier circuit board 2711; the third inner fixed end 27233 is fixed to the first side extension part 2431 and electrically connected with the carrier circuit board 2711, for example, the third inner fixed end 27233 can be electrically connected with one circuit pad on the carrier circuit board 2711; and the fourth inner fixed end 27243 is fixed to the third side extension part 2441 and electrically connected with the carrier circuit board 2711, for example, the fourth inner fixed end 27243 can be electrically connected with one circuit pad on the carrier circuit board 2711. It should be understood that since the four electrical connecting members are electrically connected with the carrier circuit board 2711 located at the third side, at least part of the first inner fixed end 27213, the second inner fixed end 27223, the third inner fixed end 27233 and the fourth inner fixed end 27243 of the four electrical connecting members are located at the third side for electrical connection with the four circuit pads on the carrier circuit board 2711. Among them, the second inner fixed end 27223 and the third inner fixed end 27233 are fixed to the third side, part of the first inner fixed end 27213 extends to the third side, and part of the fourth inner fixed end 27243 extends to the third side. Correspondingly, the carrier circuit board 2711 is provided with at least six circuit pads, four of which are used for electrical connection with the conductive connecting part 272, and two of which are used for electrical connection with the focusing coil part 251.

[0120] Accordingly, since the first electrical connection 2721, the second electrical connection 2722, the third electrical connection 2723 and the fourth electrical connection 2724 are only used for conducting electricity, the elastic coefficients (K values) of the first connecting wire 27212, the second connecting wire 27222, the third connecting wire 27232 and the fourth connecting wire 27242 are low, so that the movement of the carrier 24 relative to the frame 23 in the first direction will not be hindered by the presence of the first electrical connection 2721, the second electrical connection 2722, the third electrical connection 2723 and the fourth electrical connection 2724. In one example, the first connecting wire 27212, the second connecting wire 27222, the third connecting wire 27232 and the fourth connecting wire 27242 respectively extend in a horizontal plane perpendicular to the first direction, so as to increase the lengths of the first connecting wire 27212, the second connecting wire 27222, the third connecting wire 27232 and the fourth connecting wire 27242 in a limited space. In one specific example, the first connecting wire 27212, the second connecting wire 27222, the third connecting wire 27232 and the fourth connecting wire 27242 respectively extend in two perpendicular directions in a horizontal plane perpendicular to the first direction.

[0121] To avoid the carrier 24 from moving beyond the preset stroke during movement, the carrier 24 has four carrier limiting protrusions 245 respectively extending from the four corners of the carrier 24 towards the object side, so as to limit the stroke of the movement of the carrier 24 in the first direction towards the object side through the impact between the four carrier limiting protrusions 245 and the cover 21. Preferably, the top surfaces of the four carrier limiting protrusions 245 are of the same height. Further, the first side extension 2431, the second side extension 2421 and the third side extension 2441 respectively at least partially overlap the frame 23 as viewed along the first direction, in other words, the first side extension 2431, the second side extension 2421 and the third side extension 2441 are respectively at least partially located on the object side of the frame 23, so as to limit the stroke of the movement of the carrier 24 in the first direction towards the image side through the impact between the first side extension 2431, the second side extension 2421 and the third side extension 2441 and the frame 23.

[0122] Similarly, to prevent the frame 23 from falling off the base 22, the frame 23 has two frame limiting protrusions (2322, 2342) respectively extending from the second frame side 232 and the fourth frame side 234 towards the object side, so as to prevent the frame 23 from falling off by limiting the movement of the frame 23 in the first direction away from the base 22 towards the object side through the impact between the frame limiting protrusions (2322, 2342) and the cover 21. Preferably, the top surfaces of the two frame limiting protrusions (2322, 2342) are of the same height.

[0123] To further describe the electrical connection relationship and structure between the aperture device 40 and the lens driving device 20, the specific structure of the aperture device 40 is supplemented. Continue to refer to 2 to Figure 4 , and Figure 9 As shown in FIGS. 2 to 4, the blade assembly 43 includes a plurality of aperture blades 431 which are stacked with each other to form an aperture hole of the blade assembly 43. The blade assembly 43 is arranged on the object side of the aperture movable part 42 and the aperture fixed seat 411. The object side surface of the aperture movable part 42 is formed with a plurality of blade guide shafts 421, and the object side surface of the aperture fixed seat 411 is formed with a plurality of blade rotation shafts 4111. Each aperture blade 431 is formed with a guide hole 4311 corresponding to the blade guide shaft 421 and a rotation hole 4312 corresponding to the blade rotation shaft 4111, wherein the guide hole 4311 is located on the side closer to the optical axis than the rotation hole 4312. The guide hole 4311 and the rotation hole 4312 on the plurality of aperture blades 431 are respectively sleeved on the plurality of blade guide shafts 421 of the aperture movable part 42 and the plurality of blade rotation shafts 4111 of the aperture fixed seat 411. When the aperture movable part 42 rotates, the aperture blades 431 of the blade assembly 43 rotate around the rotation shafts, thereby changing the size of the aperture hole, changing the amount of light entering the camera module 1, and achieving the function of adjusting the aperture size.

[0124] More specifically, when the aperture driving part 44 drives the aperture movable part 42 to rotate relative to the aperture fixed part 41 in response to the driving power provided by the aperture conductive part 47, each blade guide shaft 421 drives each aperture blade 431 to rotate around the blade rotation shaft 4111 sleeved on the rotation hole 4312 of the aperture blade 431 through the guide hole 4311 on each aperture blade 431 in the blade assembly 43. That is, the aperture driving part 44 drives the aperture movable part 42 to rotate to drive the plurality of aperture blades 431 rotatably arranged on the aperture movable part 42 to rotate, thereby changing the size of the aperture hole of the blade assembly 43.

[0125] Further, the aperture device 40 can further include an aperture gasket 49 arranged between the blade assembly 43 and the aperture movable part 42, with a light passing hole therebetween to allow light to pass through. The aperture gasket 49 is usually made of black material to reduce stray light.

[0126] In one example, the aperture driving portion 44 is implemented as a voice coil motor. The aperture driving portion 44 includes at least one aperture driving magnet 441 fixed to one of the aperture movable portion 42 and the aperture fixed portion 41, and at least one aperture driving coil 443 fixed to the other of the aperture movable portion 42 and the aperture fixed portion 41, the at least one aperture driving coil 443 being electrically connected to the aperture conducting portion 47 to obtain driving power from the aperture conducting portion 47. In one specific example, the aperture driving portion 44 includes two aperture driving magnets 441 fixed to the outer side of the aperture movable portion 42 with a 180° interval, and two aperture driving coils 443 respectively opposite to the two aperture driving magnets 441 in a horizontal direction perpendicular to the optical axis and fixed to the aperture fixed seat 411, so that the two aperture driving coils 443 respectively interact with the two aperture driving magnets 441 when a magnetic field is generated under the excitation of current, to drive the aperture movable portion 42 to rotate. Further, the aperture driving portion 44 can further include two aperture magnetic conductors 442 fixed to the aperture movable portion 42 by, for example, insert molding and respectively arranged on the side of the two aperture driving magnets 441 away from the two aperture driving coils 443, so as to enhance the magnetic field intensity on the side of the two aperture driving magnets 441 facing the two aperture driving coils 443.

[0127] Further, in order to movably arrange the aperture movable portion 42 in the aperture fixed portion 41 and prevent the aperture movable portion 42 from falling off, the aperture device 40 further includes an aperture supporting portion 45 and an aperture magnetic attraction portion 46. The aperture supporting portion 45 is arranged between the aperture movable portion 42 and the aperture fixed portion 41, and the aperture magnetic attraction portion 46 is used to attract the aperture movable portion 42 to the aperture fixed portion 41, so that the aperture movable portion 42 and the aperture fixed portion 41 clamp the aperture supporting portion 45, and the aperture movable portion 42 is supported on the aperture fixed portion 41 through the aperture supporting portion 45. The aperture supporting portion 45 moves in a sliding friction or rolling friction manner relative to at least one of the aperture movable portion 42 and the aperture fixed portion 41, so that the aperture movable portion 42 can move relative to the aperture fixed portion 41 with a small frictional resistance.

[0128] In one example, the aperture support portion 45 includes at least three aperture balls 451, which are arranged between the bottom surface (image side) of the aperture movable portion 42 and the top surface (object side) of the aperture fixed seat 411. In one specific example, the aperture support portion 45 includes three aperture balls 451, the bottom surface of the aperture movable portion 42 is formed with three arc-shaped upper grooves 422, the side of the aperture fixed seat 411 facing the bottom surface of the aperture movable portion 42 is formed with three arc-shaped lower grooves 4112, the three arc-shaped upper grooves 422 and the three arc-shaped lower grooves 4112 are respectively arranged in correspondence, and the three aperture balls 451 are respectively arranged between the three arc-shaped upper grooves 422 and the three arc-shaped lower grooves 4112. The three arc-shaped upper grooves 422 extend along the circumference of the bottom surface of the aperture movable portion 42 and are equally spaced on the bottom surface of the aperture movable portion 42, so as to facilitate the rotation of the aperture movable portion 42 relative to the aperture fixed portion 41.

[0129] The aperture magnetic attraction portion 46 includes at least one aperture magnetic attraction member 461 arranged in the first direction and at least one aperture magnetic attraction magnet 462, the at least one aperture magnetic attraction member 461 is fixed to one of the aperture movable portion 42 and the aperture fixed seat 411, and the at least one aperture magnetic attraction magnet 462 is fixed to the other one of the aperture movable portion 42 and the aperture fixed portion 41, so that the aperture movable portion 42 is attracted to the aperture fixed portion 41 by the magnetic attraction between the aperture magnetic attraction member 461 and the aperture magnetic attraction magnet 462, so that the aperture movable portion 42 and the aperture fixed portion 41 clamp the aperture support portion 45. In one specific example, the aperture magnetic attraction portion 46 includes two aperture magnetic attraction members 461 and two aperture magnetic attraction magnets 462, the two aperture magnetic attraction magnets 462 are fixed to the aperture movable portion 42, and the two aperture magnetic attraction members 461 correspond to the two aperture magnetic attraction magnets 462 respectively and are fixed to the aperture fixed seat 411.

[0130] In one example, the aperture device 40 further includes an aperture position detection element 48. The aperture position detection element 48 is fixed to the aperture fixed seat 411 and electrically connected to the aperture conductive portion 47, and is used to obtain the position change information of the magnet (which can be the aperture driving magnet 441 or the aperture magnetic attraction magnet 462, or other additional magnet) fixed to the aperture movable portion 42, and then obtain the position change information of the aperture movable portion 42.

[0131] The aperture conductive part 47 is electrically connected to the carrier conductive part 271, so as to be electrically connected to the aperture device 40 through the electrical connection between the carrier conductive part 271 and the conductive connecting part 272, the base conductive part 273, and realize the electrical connection between the aperture device 40 and the external electronic equipment. The aperture conductive part 47 comprises an aperture circuit board main body 471, a first electrical lead-out strip 472 and a second electrical lead-out strip 473, the first electrical lead-out strip 472 and the second electrical lead-out strip 473 are respectively electrically connected to the aperture circuit board main body 471, and the first electrical lead-out strip 472 and the second electrical lead-out strip 473 are respectively electrically connected to the driving conductive assembly 27, so as to be electrically connected to the driving conductive assembly 27 through the first electrical lead-out strip 472 and the second electrical lead-out strip 473 from both ends of the aperture circuit board main body 471 respectively. The aperture circuit board main body 471 is fixed to the aperture fixing seat 411 of the aperture fixing part 41, the two aperture driving coils 443 of the aperture driving part 44 are electrically connected to the aperture circuit board main body 471, and the aperture position detection element 48 is electrically connected to the aperture circuit board main body 471.

[0132] Further, the carrier conductive part 271 further comprises two aperture conductive parts 2714 and 2715, the first aperture conductive part 2714 is fixed to the second side of the carrier 24, and the second aperture conductive part 2715 is fixed to the fourth side of the carrier 24, and the two aperture conductive parts can be fixed to the carrier 24 by insert molding. The first electrical lead-out strip 472 extends outward from the second side of the aperture device 40 and is electrically connected to one end of the first aperture conductive part 2714 and the first inner fixed end 27213 of the first electrical connecting part 2721, the other end of the first aperture conductive part 2714 is directly or indirectly electrically connected to the second electrical connecting part 2722, for example, the other end of the first aperture conductive part 2714 can be indirectly electrically connected to the second electrical connecting part 2722 by being electrically connected to the carrier circuit board 2711; the second electrical lead-out strip 473 extends outward from the fourth side of the aperture device 40 and is electrically connected to one end of the second aperture conductive part 2715 and the fourth inner fixed end 27243 of the fourth electrical connecting part 2724, the other end of the second aperture conductive part 2715 is directly or indirectly electrically connected to the third electrical connecting part 2723, for example, the other end of the second aperture conductive part 2715 can be indirectly electrically connected to the third electrical connecting part 2723 by being electrically connected to the carrier circuit board 2711. Correspondingly, the first electrical lead-out strip 472 and the second electrical lead-out strip 473 are respectively electrically connected to the two aperture conductive parts and the conductive connecting part 272, so as to realize the electrical connection between the aperture device 40 and the driving conductive assembly 27.

[0133] In one example, the first electrical lead-out strip 472 and the second electrical lead-out strip 473 extend outwardly from opposite sides of the aperture device 40 and are fixed to the top surface of the carrier 24. Specifically, the first electrical lead-out strip 472 extends from the aperture device 40 to above (object side) the second driving magnet 2522, and the second electrical lead-out strip 473 extends from the aperture device 40 to above (object side) the third driving magnet 2523. At least a portion of the first electrical lead-out strip 472 overlaps the second driving magnet 2522, and at least a portion of the second electrical lead-out strip 473 overlaps the third driving magnet 2523 when viewed in the first direction.

[0134] More specifically, the first electrical lead-out strip 472 extends outwardly from the second side of the aperture device 40 and is fixed to the second side of the carrier 24, and the second electrical lead-out strip 473 extends outwardly from the fourth side of the aperture device 40 and is fixed to the fourth side of the carrier 24. It should be understood that the aperture device 40 is disposed above (object side) the cover 21, and the first electrical lead-out strip 472 and the second electrical lead-out strip 473 are fixed to the top surface of the carrier 24 and electrically connected to the carrier conductive portion 271 and the conductive connecting portion 272 fixed to the carrier 24 through the cover through hole 211 of the cover 21.

[0135] It is worth mentioning that in the camera module 1 of the present application, the carrier circuit board 2711 for electrically connecting the focusing coil 2511 and the focusing position sensing element 281 and the aperture conductive portion 47 for electrically connecting the two aperture driving coils 443 and the aperture position detection element 48 are both electrically connected to the base conductive portion 273 through the conductive connecting portion 272, and are electrically connected to the photosensitive device 30 through the base conductive portion 273, thereby realizing the electrical conduction of the focusing coil 2511, the focusing position sensing element 281, the two aperture driving coils 443 and the aperture position detection element 48 to the photosensitive device 30 and external electronic equipment. In other words, the focusing driving components composed of the focusing coil 2511 and the focusing position sensing element 281 and the aperture driving components composed of the two aperture driving coils 443 and the aperture position detection element 48 share the conductive connecting portion 272, and both obtain driving power and driving signals through the electrical connection of the conductive connecting portion 272 and the base conductive portion 273, so that the overall circuit is integrated, the complexity of the circuit design is reduced, and the excessive influence of the circuit arrangement of the aperture device 40 on the movement of the optical lens 10 in the first direction is avoided. In the present application, although the focusing driving components and the aperture driving components share the conductive connecting portion 272, the circuit of the focusing driving components and the circuit of the aperture driving components are in parallel relationship, and accordingly the aperture device 40 and the lens driving device 20 are controlled separately.

[0136] It should be appreciated that, in the present application, the weight of the object to be driven by the lens driving device 20 is obviously increased due to the aperture device 40 fixed to the optical lens 10 in the camera module, and how to movably arrange the aperture device 40 and the optical lens 10 in the lens driving device 20 becomes a problem to be solved. The performance requirement of the spring for suspending the aperture device 40 and the optical lens 10 in the lens driving device 20 is extremely high. To solve the problem, the technical solution of the present application movably supports the carrier 24 in the frame 23 through the focusing support part 262, and movably supports the frame 23 in the base 22 through the anti-shake support part 264. The carrier 24 for carrying the optical lens 10 and the aperture device 40 is movably supported in the lens driving device 20 by using support parts such as balls, guide rods, sliders, etc., thereby avoiding the problem that the spring is difficult to load due to the arrangement of the aperture device 40.

[0137] Further, the focusing function of the lens driving device 20 is realized by movably supporting the carrier 24 through the focusing support part 262, therefore, the magnet for focusing (the first driving magnet 2521) is arranged on only one side (the first side) of the lens driving device 20. The magnet for anti-shake needs to realize the movement of the frame 23 in the horizontal direction (the second direction), therefore, the magnet for anti-shake needs to be arranged on at least two sides. To reduce the overall size of the lens driving device 20, the first driving magnet 2521 is also used for anti-shake, and another magnet for anti-shake (the second driving magnet 2522) needs to be arranged on the adjacent side (for example, the second side) of the first driving magnet 2521. Considering the increase of the driving force for anti-shake, more magnets for anti-shake (the third driving magnet 2523) can be further arranged on other sides.

[0138] The focusing position sensing element 281 and the focusing position sensing magnet 282 in the focusing position sensing assembly 28 are arranged in the lens driving device 20 along the first direction, to avoid the adverse effect of the driving magnet part 252 on the position sensing function of the focusing position sensing element 281, the focusing position sensing element 281 and the focusing position sensing magnet 282 are arranged on the side of the lens driving device 20 where the driving magnet part 252 is not arranged, that is, the focusing position sensing assembly 28 and the driving magnet part 252 are arranged on different sides of the lens driving device 20. Preferably, the focusing position sensing element 281 and the focusing position sensing magnet 282 are arranged on the third side, the third side of the lens driving device 20 is not arranged with the driving magnet part 252, which not only avoids the influence of the magnetic force of the driving magnet part 252 on the focusing position sensing element 281, but also provides sufficient space for the arrangement of the focusing position sensing magnet 282, so that the height design of the driving magnet part 252 is not limited by the focusing position sensing magnet 282, and the problem of the increase of the height size of the lens driving device 20 due to the arrangement of the focusing position sensing assembly 28 is reduced.

[0139] Since the first side 51 of the carrier 24 is provided with the focusing coil 2511 and the third side 53 is provided with the focusing position sensing element 281, the space for electrically connecting the first side 51 and the third side 53 of the carrier 24 to the aperture device 40 is small. Accordingly, the first electric lead-out strip 472 and the second electric lead-out strip 473 of the aperture device 40 are preferably respectively led out from the second side 52 and the fourth side 54 opposite to each other and are respectively fixed to the second side 52 and the fourth side 54 of the carrier 24, so as to avoid the first side 51 provided with the focusing coil 2511 and the third side 53 provided with the focusing position sensing element 281.

[0140] On the other hand, since the first side 51 of the carrier 24 is provided with the focusing coil 2511 and the space for electrically connecting the first side 51 of the carrier 24 to the aperture device 40 is small, the first electric lead-out strip 472 and the second electric lead-out strip 473 of the aperture device 40 extend outwardly from the two opposite sides of the aperture device 40. Therefore, the first electric lead-out strip 472 and the second electric lead-out strip 473 preferably extend outwardly from the second side 52 and the fourth side 54, so as to avoid being arranged on the first side 51.

[0141] The above describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above-described embodiments, and the above-described embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A lens driving device, characterized in that: include: base; a frame movably disposed on the base; a lens driving assembly, wherein the lens driving assembly drives the frame to move relative to the base, and the lens driving assembly includes a driving magnet portion; Anti-shake support part; as well as An anti-shake magnetic attraction portion, wherein the anti-shake magnetic attraction portion and the driving magnet portion are magnetically attracted to each other, and the anti-shake magnetic attraction portion is used to adsorb the frame to the base so that the frame is supported on the top surface of the base through the anti-shake support portion. The anti-shake support portion includes at least three anti-shake balls, and any two of the at least three anti-shake balls are used as bearing shafts. The magnetic attraction force between the anti-shake magnetic attraction portion and the driving magnet portion exerts a torque on the frame that is greater than the torque exerted on the frame by the gravity of the frame and other camera module components supported by the frame.

2. The lens driving device according to claim 1, wherein: The anti-shake support portion includes four anti-shake balls, and the four anti-shake balls are arranged in a trapezoidal shape between the frame and the base.

3. The lens driving device according to claim 1, wherein: The lens driving device further includes a carrier, which is used to carry the optical lens, and the carrier is movably arranged on the frame.

4. The lens driving device according to claim 3, wherein: The lens driving device also includes a focus support portion and a focus magnetic portion, wherein the focus support portion is arranged between the carrier and the frame along a first direction, and the focus magnetic portion is used to adsorb the carrier toward the frame so that the carrier is supported on the side of the frame close to the optical axis through the focus support portion.

5. The lens driving device according to claim 3, wherein: The lens driving device further includes a focus position sensing component, and the focus position sensing component and the driving magnet portion are arranged on different sides of the lens driving device.

6. The lens driving device according to claim 5, wherein: The focus position sensing component includes a focus position sensing element and a focus position sensing magnet arranged relatively along a first direction, wherein the first direction is parallel to the optical axis of the optical lens, the focus position sensing element is fixed to the carrier, and the focus position sensing magnet is fixed to the frame.

7. The lens driving device according to claim 6, wherein: The driving magnet portion is arranged on the frame, and the driving magnet portion includes a first driving magnet, a second driving magnet and a third driving magnet. The second driving magnet and the third driving magnet are arranged on both sides of the first driving magnet, and the focus position sensing magnet is arranged on the opposite side of the first driving magnet.

8. The lens driving device according to claim 7, wherein: The bottom surface of the first driving magnet is flush with the bottom surface of the second driving magnet and the bottom surface of the third driving magnet, the top surface of the first driving magnet is higher than the top surface of the second driving magnet and the top surface of the third driving magnet, and the bottom surface of the focus position sensing magnet is lower than the top surface of the second driving magnet and the top surface of the third driving magnet.

9. The lens driving device according to claim 7 or 8, wherein: The lens driving device also includes a focusing coil unit and an anti-shake coil unit, wherein the focusing coil unit is arranged on the carrier and opposite to the driving magnet unit, and the focusing coil unit includes a focusing coil arranged opposite to the first driving magnet; the anti-shake coil unit is arranged on the base and opposite to the driving magnet unit, and the anti-shake coil unit includes a first anti-shake coil, a second anti-shake coil and a third anti-shake coil respectively arranged opposite to the first driving magnet, the second driving magnet and the third driving magnet.

10. The lens driving device according to claim 9, wherein: The lens driving device also includes a driving conductive component, which includes a carrier conductive part arranged on the carrier, a base conductive part arranged on the base, and a conductive connecting part electrically connecting the carrier conductive part and the base conductive part, wherein the carrier conductive part includes a first coil conductive part, a second coil conductive part and a carrier circuit board fixed to the carrier, the focus position sensing element is fixed and electrically connected to the carrier circuit board, the first coil conductive part and the second coil conductive part electrically connect the focus coil and the carrier circuit board, and the anti-shake coil part is electrically connected to the base conductive part.

11. The lens driving device according to claim 10, wherein: The driving conductive component is also used to be electrically connected to the aperture device. The aperture device includes a first electrical conduction tape and a second electrical conduction tape. The first electrical conduction tape and the second electrical conduction tape extend outward from opposite sides of the aperture device and are fixed to the top surface of the carrier. The first electrical conduction tape and the second electrical conduction tape are respectively electrically connected to the driving conductive component.

12. The lens driving device according to claim 11, wherein: The lens driving device also includes a cover body fixed to the base, the aperture device is arranged above the cover body, the first and second electrical conduction belts pass through the cover body through holes of the cover body and are fixed to the top surface of the carrier and electrically connected to the carrier conductive part and the conductive connecting part fixed to the carrier.

13. A camera module, characterized in that: include: An optical lens having an optical axis; A photosensitive device, the photosensitive device is used to receive the light emitted by the optical lens to form an image; as well as The lens driving device according to any one of claims 1 to 12, wherein the driving device is suitable for driving the optical lens to move.

14. The camera module according to claim 13, wherein: The camera module also includes an aperture device fixed to the optical lens, the aperture device includes an aperture fixed part, an aperture movable part, a blade assembly, an aperture driving part and an aperture conductive part, the aperture movable part is movably arranged on the aperture fixed part, the blade assembly is linked to the aperture movable part, the aperture driving part is arranged between the aperture movable part and the aperture fixed part, the aperture conductive part is configured to provide driving power to the aperture driving part, the aperture driving part drives the aperture movable part to move relative to the aperture fixed part, the blade assembly has an adjustable aperture hole, and the blade assembly changes the size of the aperture hole as the aperture movable part moves.

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