Lens driving device, camera module and camera equipment

Abstract

The invention relates to a lens driving device, a camera module and camera equipment, and the device comprises a pedestal, a housing connected to the pedestal, and a movable frame which is located in a cavity formed in the pedestal and the housing and is driven by a first driving mechanism to move in a plane perpendicular to an optical axis. The lens driving device comprises a base, a movable frame and a focusing frame, the movable frame is at least partially located in the base, the focusing frame is driven by a second driving mechanism to move in the axial direction of an optical axis, and the lens driving device further comprises a first elastic piece and a second elastic piece which are located on the front side and the rear side of the focusing frame in the optical axis direction respectively. The second elastic piece is connected to the shell, the movable frame and the focusing frame. According to the invention, the two groups of elastic sheets are adopted, so that one group of elastic sheets is used for preventing shake, and the other group of elastic sheets is used for controlling the electric connection of focusing motion and participating in auxiliary shake prevention, and therefore, fatigue or aging of a single elastic sheet in a long-term use process can be effectively solved.

Description

Technical Field

[0001] The present application belongs to the field of electronic equipment photography, and in particular, relates to a lens driving device, a camera module and a camera device. Background Art

[0002] Optical image stabilization in mobile photography is a technology for a stabilizing platform that aims to reduce the impact of camera shake and vibration on image stability. When taking photos with a mobile phone, the image may be blurry or distorted due to factors such as hand shaking and object movement. This is when the optical image stabilization technology can play an important role.

[0003] The camera's optical image stabilization technology uses a mechanical stabilizer to achieve adaptive adjustment of the camera as the external environment changes through the electronic system and motion sensor of the control unit. That is, the shaking and vibration trajectory of the mobile phone is determined according to external factors, and the shaking and vibration forces are balanced by controlling the position of the lens or the components of the camera sensor. This ensures the clarity and stability of the picture when shooting still photos or continuous dynamic videos.

[0004] Optical image stabilization uses a purely optical method for correction. Compared with digital image stabilization, it is more reliable and still has advantages in low light conditions. It can also focus quickly, the picture is more stable, and the captured images are clearer and more natural.

[0005] In the prior art, patent CN114217491B discloses a novel anti-shake camera driving device, including a base, a protective shell, an OIS component, an AF component, a spring assembly and a closed-loop control component, the spring assembly includes an upper spring and a lower spring, and its technical points are: damping grooves are respectively provided at the four corners of the upper surface of the bottom plate of the base, and the base is provided with a retaining wall at one side of the damping groove, and the upper spring has a fixing part I connected to the top surface of the AF carrier, a fixing part II connected to the top surface of the OIS carrier, a fixing part III connected to the top surface of the retaining wall, a string part I connected between the fixing part I and the fixing part II, and a bending connection part connected between the fixing part II and the fixing part III, and the lower end of the bending connection part is inserted into the damping glue of the damping groove. This device solves the problems of complicated assembly and easy breakage of the existing compensation system using suspension wires and excessive space occupied by welding points. Focus and anti-shake translation compensation share the same suspension component, which significantly improves the anti-shake performance and enhances the motor focus and anti-shake translation compensation effect.

[0006] In the above patents and prior art, anti-shake is a closed-loop control, which is costly and has a complicated assembly process. Summary of the invention

[0007] The purpose of the present invention is to provide a lens driving device, a camera module and a camera equipment that can solve the above-mentioned technical problems.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A lens driving device, comprising a base and a shell connected to the base, a moving frame located in a chamber formed inside the base and the shell and moving in a plane perpendicular to the optical axis under the drive of a first driving mechanism, and a focusing frame located at least partially in the moving frame and moving axially along the optical axis under the drive of a second driving mechanism, the lens driving device further comprising a first elastic sheet and a second elastic sheet, the first elastic sheet being connected to the base, the moving frame and the focusing frame respectively, and the second elastic sheet being connected to the shell, the moving frame and the focusing frame respectively;

[0010] The first driving mechanism and the second driving mechanism are both electromagnetic driving mechanisms, at least a portion of the first driving mechanism is disposed on the base, and the remaining portion of the first driving mechanism is disposed on the moving frame;

[0011] At least a portion of the second driving mechanism is disposed on the moving frame, and the remaining portion of the second driving mechanism is disposed on the focusing frame.

[0012] Furthermore, the first driving mechanism includes a plurality of first magnet groups fixed to the movable frame, and a plurality of first coil groups fixed to the base, a group of the first magnet groups corresponds to a group of the first coil groups, and the first magnet groups and the first coil groups cooperate to drive the movable frame to move in at least one direction within the plane.

[0013] Furthermore, the second driving mechanism includes a plurality of second magnet groups fixed to the moving frame, and a second coil group fixed to the outer periphery of the focusing frame, and the second magnet group and the second coil group cooperate to drive the focusing frame to move.

[0014] Furthermore, the first spring piece and the second spring piece each include a plurality of anti-shake spring wires, each of the anti-shake spring wires is respectively connected to a pair of focus spring wires, each of the anti-shake spring wires is sequentially connected to the base and the moving frame, and each of the focus spring wires is sequentially connected to the moving frame and the focus frame.

[0015] Furthermore, the first spring clip includes a first spring clip and a second spring clip, the first spring clip and the second spring clip are electrically connected to the second coil group respectively, and the base is provided with conductive terminals electrically connected to the first spring clip and the second spring clip respectively.

[0016] Furthermore, the lens driving device also includes a damping structure, at least a portion of which is connected to an inner wall of the shell on a side of the shell away from the base, and the remaining portion of the damping structure is connected to the moving frame.

[0017] Furthermore, the damping structure includes a plurality of damping rods, one end of each damping rod is connected to the inner wall of the shell, the other end of each damping rod is connected to the damping rod insertion hole of the moving frame, and the other end of each damping rod is connected to the damping glue arranged in the damping rod insertion hole.

[0018] Furthermore, a gasket is provided on the inner wall of the shell away from the base, the second elastic sheet is respectively connected to the gasket, the moving frame and the focusing frame, and one end of the damping rod is connected to the gasket.

[0019] Furthermore, a plurality of protrusions are provided on the outer periphery of the moving frame, the remaining part of the first driving mechanism is arranged on the protrusions, the damping rod insertion hole is provided on the protrusions, damping glue is provided in the damping rod insertion hole, and the other end of the damping rod is connected to the damping glue.

[0020] The present application also provides a camera module, which includes the lens driving device.

[0021] The present application also provides a camera device, which includes the camera module.

[0022] Compared with the existing technology, the advantages of the present application are: it adopts the form of a double group of spring clips, so that one group of spring clips is used for anti-shake, and the other group of spring clips is used for electrical control of focusing movement and participation in auxiliary anti-shake, which effectively solves the problem of fatigue or aging of a single spring clip during long-term use. At the same time, in the focusing movement, an open-loop design is adopted, and two groups of spring clips are directly connected to the conductive terminals, which has better performance and lower cost while achieving the same focusing efficiency. The two groups of spring clips can provide better contact on the contact area, reduce instability in the signal transmission process, and jointly bear the load, improve the overall carrying capacity, and adapt to higher usage requirements.

[0023] The moving frame carries the corresponding parts of the two drives, which can make the overall structure more compact and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a diagram of the internal assembly of the housing of the lens driving device of the present invention;

[0025] Figure 2 It is an exploded detailed front view of the main structure of the lens driving device of the present invention;

[0026] Figure 3 It is an exploded detailed bottom view of the main structure of the lens driving device of the present invention;

[0027] Figure 4 It is a front view of the main structure details of the focusing frame of the present invention;

[0028] Figure 5 It is a front view of the main structure details of the movable frame of the present invention;

[0029] Figure 6 A bottom view of the main structure details of the movable frame of the present invention;

[0030] Figure 7 This is a main structural diagram of the first spring piece of the present invention;

[0031] Figure 8 This is a main structural diagram of the second spring piece of the present invention;

[0032] Fig. 9 This is a schematic diagram of an example of a camera device in Embodiment 4.

[0033] In the figure, base 1, shell 2, shell inner wall 20, moving frame 3, protrusion 30, protruding top surface 300, damping rod insertion hole 301, damping rod 4, gasket 40, first driving mechanism 5, first magnet group 50, first coil group 51, focusing frame 6, second driving mechanism 7, second magnet group 70, second coil group 71, first axis X, second axis Y, optical axis Z, plane xY, first spring clip S1, first spring clip S10, second spring clip S11, conductive terminal S12, second spring clip S2, inner fixing member S20, outer fixing member S21, anti-shake spring wire S3, damping structure S4, focusing spring wire S5, first mounting part S53, second mounting part S54. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] Embodiment 1

[0039] This embodiment will explain the lens driving device. Figure 1-Figure 2 As shown, the lens driving device includes a base 1 located at the bottom and an upper shell 2 connected to the base 1, the two are combined to form a chamber inside, and various components of the lens driving device are arranged in the chamber, including a moving frame 3 that moves in a plane xY perpendicular to the optical axis Z under the drive of a first driving mechanism 5, the moving frame 3 is used to perform an anti-shake operation of the lens, and a focus frame 6 that is at least partially located in the moving frame 3 and moves axially along the optical axis Z under the drive of a second driving mechanism 7, the moving frame 3 and the focus frame 6 cooperate with each other to achieve the anti-shake and focusing effects.

[0040] There is a first spring piece S1 between the base 1, the moving frame 3 and the focusing frame 6 for fixed connection, and there is a second spring piece S2 between the shell 2, the moving frame 3 and the focusing frame 6 for fixed connection.

[0041] When the first spring piece S1 connects the base 1, the movable frame 3 and the focus frame 6, there is a certain space between the base 1 and the movable frame 3, and the first driving mechanism 5 is arranged between the base 1 and the movable frame 3. Specifically, the first driving mechanism 5 is at least partially arranged on the base 1, and the remaining part of the first driving mechanism 5 is arranged on the movable frame 3. In the present embodiment, the first driving mechanism 5 includes a plurality of first magnet groups 50 fixed to the movable frame 3, and a plurality of first coil groups 51 fixed to the base 1. One group of first magnet groups 50 corresponds to one group of first coil groups 51. Preferably, in the present embodiment, each group of corresponding first magnet groups 50 and first coil groups 51 are designed to be distributed at intervals up and down.

[0042] In this embodiment, the second driving mechanism 7 is arranged between the focusing frame 6 and the moving frame 3, at least part of the second driving mechanism 7 is arranged on the moving frame 3, and the remaining part of the second driving mechanism 7 is arranged on the focusing frame 6. Specifically, a plurality of second magnet groups 70 in the second driving mechanism 7 are fixed to the moving frame 3, and the second coil group 71 in the second driving mechanism 7 is wound on the circumferential outer wall of the focusing frame 6, and the outer wall of the focusing frame 6 is designed to be cylindrical for easy winding. In other embodiments, the second coil group 71 can be a side-wound coil that is spaced apart from the second magnet group 70 in a direction perpendicular to the optical axis Z, and the winding axis centerline of the side-wound coil is perpendicular to the optical axis Z.

[0043] Further, in this embodiment, the specific structures of the first spring sheet S1 and the second spring sheet S2 are as follows: Figure 7-Figure 8 As shown, the first spring piece S1 and the second spring piece S2 have common characteristic parts and different characteristic parts. The common characteristic parts include a plurality of anti-shake spring wires S3 and a plurality of focusing spring wires S5. Preferably, the number of the anti-shake spring wires S3 in this embodiment is selected to be four, and each anti-shake spring wire S3 is respectively connected to a pair of focusing spring wires S5.

[0044] The shell 2 is a square shell. At this time, the base 1 and the shell 2 are buckled together to form a square chamber inside. A pair of focusing spring wires S5 and an anti-shake spring wire S3 are distributed in each corner space of the square chamber to fully utilize the corner space, making the overall structure of the lens driving device of this embodiment more compact.

[0045] Furthermore, each anti-shake spring wire S3 is connected to the base 1 and the moving frame 3 , and each focus spring wire S5 is connected to the moving frame 3 and the focus frame 6 .

[0046] The focus spring wire S5 is composed of at least a portion distributed in the X direction and the remaining portion distributed in the Y direction, and the elastic wires distributed in the X direction and the Y direction are vertically connected, and the elastic wires are U-shaped, etc. Of course, multiple U-shaped elastic wires can be distributed in the X direction and the Y direction. For example, two connected U-shaped elastic wires are distributed in the Y direction. In other embodiments, a portion of the focus spring wire S5 can be along a curved portion that is set at an angle to both the X direction and the Y direction.

[0047] Two of the focus spring wires S5 are distributed on one diagonal of the square chamber, and the other two focus spring wires S5 are distributed on the other diagonal of the square chamber. With the optical axis as the center, the two focus spring wires S5 distributed on one diagonal of the square chamber are distributed in a mirror image, and the other two focus spring wires S5 distributed on the other diagonal of the square chamber are distributed in a mirror image.

[0048] The anti-shake spring wire S3 includes two coils connected in sequence, the two coils are distributed on both sides of the corresponding diagonal line and the two coils are distributed on a vertical line perpendicular to the corresponding diagonal line. Each coil is formed by multiple sections of U-shaped sub-coils with oppositely distributed U-shaped openings.

[0049] The different characteristic parts of the first spring clip S1 and the second spring clip S2 include: in the focusing movement, the first spring clip S1 provides power to the second driving mechanism 7. Specifically, the first spring clip S1 is divided into a first spring clip S10 and a second spring clip S11. The first spring clip S10 and the second spring clip S11 are electrically connected to the second coil group 71 respectively. The design of the two groups of spring clips can control the forward and reverse directions of the current in the second coil group 71, thereby achieving the control of the driving direction of the electromagnetic force. The terminal of the spring clip is connected to the conductive terminal S12 on the base 1.

[0050] Two of the four focus spring wires S5 are connected to the first spring piece S10 , and the remaining two focus spring wires S5 are connected to the second spring piece S11 .

[0051] Next, each focus spring wire S5 and anti-shake spring wire S3 are connected via the first mounting portion S53, the first spring sheet S10 and the second spring sheet S11 are fixed to the focus frame 6, and the first mounting portion S53 is fixed to the moving frame 3. The first mounting portion S53 is, for example, annular.

[0052] In addition, one end of each anti-shake spring wire S3 away from the focus spring wire S5 is connected to a second mounting portion S54. The second mounting portion S54 is sheet-shaped and fixed to the base 1. The first spring sheet S1 is fixed by glue or the like.

[0053] The second spring piece S2 plays the role of elastic reset and limit in the process of focusing and anti-shake. The second spring piece S2 also includes an inner fixing member S20 and an outer fixing member S21, and both the inner fixing member S20 and the outer fixing member S21 are annular structures. In other embodiments, the inner fixing member S20 and the outer fixing member S21 can be divided into two separate parts or four independent parts.

[0054] The inner fixing member S20 is preferably in a circular shape, and four focusing spring wires S5 are connected to the outer side of the inner fixing member S20. The outer fixing member S21 is preferably in a square shape, and an anti-shake spring wire S3 is connected to each of the four corners of the outer fixing member S21.

[0055] The inner fixing member S20 is fixed to the focus frame 6, and the outer fixing member S21 is fixed to the top surface of the housing 2. The second spring sheet S2 is fixed by glue or the like.

[0056] As another embodiment, the number of the anti-shake spring wires S3 may be two or three, and the number of the focus spring wires S5 changes with the anti-shake spring wires S3, as long as the numbers of the two are kept consistent.

[0057] It has good resilience in any direction on the plane xY. Since the moving frame 3 moves on the plane xY during anti-shake, the spring pattern enables the moving frame 3 to obtain uniform resilience in any direction on the plane xY. This feature is particularly important for anti-shake effect, because in actual applications, vibration is usually multi-directional, not limited to a single direction.

[0058] like Figure 7-Figure 8 As shown, the difference between the first spring piece S1 and the second spring piece S2 is that the first spring piece S1 is a split two-stage spring piece design, which is designed to achieve the purpose of independent current open-loop control, while the second spring piece S2 is an integrated spring piece design.

[0059] Embodiment 2

[0060] The structure and principle of this embodiment are basically the same as those of the first embodiment. The difference lies in that, with respect to the lens driving device of the first embodiment, this embodiment will continue to explain other main components of the lens driving device.

[0061] like Figure 1-Figure 2 As shown, the lens drive includes a base 1 and a shell 2 connected to the base 1, and a moving frame 3 that moves in a plane xY perpendicular to the optical axis Z, wherein the base 1 and the shell 2 are connected to each other to form a working space, and the moving frame 3 for anti-shake is placed in the working space.

[0062] In this embodiment, a damping structure S4 partially connected to the moving frame 3 is also provided. The damping structure S4 can provide a flexible support to make the moving frame 3 more stable during movement, prevent shaking and deviation caused by irregular movement, and ensure that the lens remains in an ideal optical position. The damping structure S4 in this design includes a plurality of damping rods 4 distributed along the optical axis Z axis, such as Figure 5 As shown, a damping rod insertion hole 301 is also designed on the moving frame 3 to cooperate with the damping rod 4, and there is damping glue in the damping rod insertion hole 301;

[0063] Specifically, in this embodiment, there are four groups of damping rods 4 and damping rod insertion holes 301, which are evenly distributed along the circumference of the moving frame 3. The housing 2 and the moving frame 3 in this embodiment are both square. In order to maintain the force stability of each structure, this design designs each damping rod 4 at the center of the corresponding side of the housing 2 and the moving frame 3 to ensure that external vibrations can be effectively offset at all angles. The matching design between each group of damping rods 4 and the damping rod insertion holes 301 adopts the method of injecting damping glue, which not only provides a certain degree of freedom, but also ensures the stability of movement. Among them, the damping rod insertion holes 301 are stepped blind holes. The different heights of the stepped blind holes can increase or decrease the amount of damping glue and the contact surface according to actual needs, enhance the buffering effect, and effectively absorb vibration and impact.

[0064] In the prior art, when performing anti-shake actuation, the damping rubber structure is basically designed in the gap between the base 1 and the moving frame 3, which will lose part of the space of the base and fail to maximize the use of the spatial thrust of the base 1. The gap is small and the damping effect cannot be designed in a gradient manner. Preferably, the present design scheme provides a damping rod insertion hole 301 on the raised top surface 300 of the moving frame 3, and injects the damping rubber therein, which effectively solves the defects in the prior art and greatly reduces the processing cost.

[0065] Among them, one end of the damping rod 4 is inserted into the damping rubber in the damping rod insertion hole 301, which plays a buffering effect. The other end of the damping rod 4 is connected to the top of the inner wall 20 of the shell in the above-mentioned working space. Specifically, the damping rod 4 is connected to the inner wall 20 of the shell through a gasket 40. All damping rods 4 are first vertically fixed on the gasket 40, and then the gasket 40 is fixedly connected to the inner wall 20 of the shell, which plays a relatively fixed effect with the base 1. The moving frame 3 can be anti-shake under the restriction of the damping rod 4, thereby effectively resisting the influence of external vibration on the lens system.

[0066] During anti-shake operation, when external vibration or hand shaking acts on the moving frame, the damping rubber in the damping rod extending into the hole 301 absorbs part of the impact force through its elastic properties, forming a "soft contact" state, so that the moving frame can slowly return to its initial position when it is impacted for the first time, or in the anti-shake movement, reduce the sense of frustration caused by the driving mechanism.

[0067] In addition, the relative fixing between the damping rod and the housing achieves structural stability, so that the moving frame is not likely to deviate from its predetermined path during large-scale movement.

[0068] In this embodiment, another design scheme of the damping rod 4 and the damping rod insertion hole 301 is also provided. In this design, a plurality of protrusions 30 are provided on the outer periphery of the moving frame 3, and the damping rod insertion hole 301 is designed on the protrusions 30. In coordination with this, since the damping rod 4 needs to be designed to be vertically inserted into the damping rod insertion hole 301, the damping rod 4 is vertically fixedly connected to the side of the inner wall 20 of the shell body. This design scheme can still achieve the effect of the original design.

[0069] like Figure 6 As shown, the first driving mechanism 5 includes a first magnet group 50 and a first coil group 51, and the first magnet group 50 and the first coil group 51 have four groups, which are respectively arranged on one of the four sides of the moving frame 3, wherein a relative group of the first magnet group 50 and the first coil group 51 controls the moving frame 3 to move along the X direction perpendicular to the optical axis Z, and another relative group of the first magnet group 50 and the first coil group 51 controls the moving frame 3 to move along the Y direction perpendicular to the optical axis Z and the X direction. The protrusion 30 on the moving frame 3 is designed with a magnet receiving groove near the bottom of the base 1, and the first magnet group 50 is fixed in the magnet receiving groove (that is, the remaining part of the first driving mechanism 5 is arranged on the protrusion 30). Specifically, the first magnet group 50 is designed as a Halbach array structure, and this structural design has the advantages of reducing the volume of the motor and improving the power density of the driving component.

[0070] In the first and second embodiments, no position detection sensor is provided between the moving frame 3 and the base 1, and the moving frame 3 is suspended and supported by the first spring sheet S1 and the second spring sheet S2, because the first spring sheet S1 and the second spring sheet S2 both follow Hooke's law F=kx, and at the same time, the first coil group 51 and the first magnet group 50 conform to the Lorentz force law. When it is necessary to move the moving frame 3 in a specified direction and by a specified distance, because the spring sheet k value in Hooke's law is determined, the force and the amount of deformation of the spring sheet are in a linear relationship, and a pre-calculated current or a set of current values ​​is passed through at least one first coil group 51, and the Lorentz force generated can push the moving frame 3 to move by a specified distance and direction, then the final moving position of the moving frame 3 can be basically determined without feedback of the position of the moving frame 3 relative to the base 1, thereby realizing the anti-shake movement of the lens driven by the moving frame 3, and reducing the application of position sensors, which can reduce costs.

[0071] like Figure 3-Figure 4 As shown, the focusing frame 6 is disposed in the movable frame 3 and moves axially along the optical axis Z.

[0072] A second driving mechanism 7 is also provided between the focusing frame 6 and the moving frame 3. The second driving mechanism 7 includes a second magnet group 70 arranged in the magnet receiving groove. It is particularly noted that the second magnet group 70 is designed to be close to the inner wall of the moving frame 3, and a second coil group 71 cooperating with the second magnet group 70 is fixed on the outer peripheral side wall of the focusing frame 6 in a ring-shaped winding manner.

[0073] In addition, the synergy between the second drive mechanism 7 and the first drive mechanism 5 can realize more complex focus anti-shake modes, such as fast focus and fine adjustment. When the user needs to quickly focus on the subject, the second drive mechanism 7 can quickly adjust the focus frame 6 to the target position; and when precise shooting is required, the current of the second coil group 71 can be finely controlled to achieve fine adjustments.

[0074] Embodiment 3

[0075] The structure and principle of this embodiment are basically the same as those of Embodiment 1 and Embodiment 2, and the different structure is that, with respect to the lens driving device of the above-mentioned Embodiment 1 and Embodiment 2, the camera module of this embodiment includes a lens driving device.

[0076] The camera module includes a lens drive device. The camera module refers to a modular component that integrates a camera, lens, sensor and other related components. The camera module usually includes image sensors, image processors, lenses, optical filters, focus adjusters, autofocus modules and other components, and can be directly used in various devices and applications, such as smartphones, tablets, surveillance cameras, car cameras, etc.

[0077] Embodiment 4

[0078] The structure and principle of this embodiment are basically the same as those of the third embodiment, and the different structure is that, with respect to the camera module of the third embodiment, the camera device of this embodiment includes a camera module.

[0079] like Figure 7 As shown, the camera device is a complete photographic device, which usually includes multiple components such as camera module, lens, storage medium, display screen, control panel, etc. In addition to the camera module, the camera device also includes an external housing, control interface, display screen, memory card slot, etc., forming a complete working system that can complete multiple functions such as image capture, real-time preview, storage, playback / transmission, etc., and belongs to a more advanced application.

[0080] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A lens driving device, comprising a base (1) and a shell (2) connected to the base (1), a moving frame (3) located in a chamber formed inside the base (1) and the shell (2) and moving in a plane (xY) perpendicular to an optical axis (Z) under the drive of a first driving mechanism (5), and a focusing frame (6) located at least partially in the moving frame (3) and moving axially along the optical axis (Z) under the drive of a second driving mechanism (7), characterized in that: The lens driving device further comprises a first elastic sheet (S1) and a second elastic sheet (S2) respectively located at the front and rear sides of the focus frame (6) along the optical axis (Z) direction, the first elastic sheet (S1) being connected to the base (1), the movable frame (3) and the focus frame (6) in sequence, and the second elastic sheet (S2) being connected to one of the housing (2) or the base (1), the movable frame (3) and the focus frame (6) in sequence; The first driving mechanism (5) and the second driving mechanism (7) are both electromagnetic driving mechanisms, at least part of the first driving mechanism (5) is arranged on the base (1), and the remaining part of the first driving mechanism (5) is arranged on the moving frame (3); At least part of the second driving mechanism (7) is arranged on the moving frame (3), and the remaining part of the second driving mechanism (7) is arranged on the focusing frame (6).

2. The lens driving device according to claim 1, characterized in that: The first driving mechanism (5) comprises a plurality of first magnet groups (50) fixed to the movable frame (3), and a plurality of first coil groups (51) fixed to the base (1); one group of the first magnet groups (50) corresponds to one group of the first coil groups (51); the first magnet groups (50) and the first coil groups (51) cooperate to drive the movable frame (3) to move in at least one direction within the plane (xY); the second driving mechanism (7) comprises a plurality of second magnet groups (70) fixed to the movable frame (3), and a second coil group (71) fixed to the outer periphery of the focusing frame (6); the second magnet groups (70) and the second coil groups (71) cooperate to drive the focusing frame (6) to move.

3. The lens driving device according to claim 1, characterized in that: The first spring sheet (S1) and the second spring sheet (S2) both include a plurality of anti-shake spring wires (S3), each of the anti-shake spring wires (S3) is respectively connected to a pair of focus spring wires (S5), each of the anti-shake spring wires (S3) is connected to the base (1) and the moving frame (3), and each of the focus spring wires (S5) is connected to the moving frame (3) and the focus frame (6).

4. The lens driving device according to claim 1, 2 or 3, characterized in that: The first spring clip (S1) comprises a first spring clip (S10) and a second spring clip (S11), the first spring clip (S10) and the second spring clip (S11) being electrically connected to the second coil group (71) respectively, and the base (1) is provided with conductive terminals (S12) electrically connected to the first spring clip (S10) and the second spring clip (S11) respectively.

5. The lens driving device according to claim 1, characterized in that: The lens driving device also includes a damping structure (S4), at least a portion of which is connected to the housing inner wall (20) of the housing (2), and the remaining portion of which is connected to the moving frame (3).

6. The lens driving device according to claim 5, characterized in that: The damping structure (S4) comprises a plurality of damping rods (4), one end of each damping rod (4) being connected to the inner wall (20) of the shell, the other end of each damping rod (4) being connected to a damping rod insertion hole (301) of the moving frame (3), and the other end of each damping rod (4) being connected to a damping glue arranged in the damping rod insertion hole (301).

7. The lens driving device according to claim 6, characterized in that: A gasket (40) is provided on the inner wall of the shell (2); the second spring sheet (S2) is sequentially connected to the gasket (40), the moving frame (3) and the focusing frame (6); and one end of the damping rod (4) is connected to the gasket (40).

8. The lens driving device according to claim 7, characterized in that: A plurality of protrusions (30) are provided on the outer periphery of the moving frame (3); the remaining portion of the first driving mechanism (5) is provided on the protrusions (30); and the damping rod insertion hole (301) is provided on the protrusions (30).

9. A camera module, characterized in that: The camera module includes the lens driving device described in any one of claims 1-8.

10. A camera device, characterized in that The camera device includes the camera module described in claim 9.

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