Lens driving device, camera module and electronic equipment

Abstract

The utility model relates to a lens driving device, camera module and electronic equipment, including the base and the movable frame that moves in the plane perpendicular to the optical axis relative to the base, the base and the movable frame are connected through a plurality of elastic pieces, each elastic piece extends in two different directions of the plane to form the elastic piece of two-dimensional structure. The anti-shake mechanism has the advantages that the elastic piece is arranged between the base and the movable frame, so that the problem that the elastic piece cannot guarantee uniform rigidity and rebound counter-force in the moving direction of the movable frame in the anti-shake mechanism in the prior art is effectively solved, meanwhile, the design of the anti-shake mechanism is effectively simplified, and the manufacturing cost of the anti-shake mechanism is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of 3C product accessories technology, and in particular relates to a lens driving device, a camera module and an electronic device. Background Technology

[0002] Optical image stabilization (OIS) in mobile photography is a motion stabilization technology designed to reduce the impact of camera shake and vibration on image stability. During mobile phone photography, factors such as hand tremors and object movement often lead to blurry or distorted images; in these situations, OIS plays a crucial role.

[0003] Optical image stabilization (OIS) technology in cameras employs mechanical stabilization devices, using the electronic system of the control unit and motion sensors to enable the camera to adaptively adjust to changes in the external environment. Specifically, it detects the shaking and vibration of the phone based on external factors and balances these forces by controlling the position of the lens or components of the camera sensors. This ensures both image sharpness and stability when shooting still photos or continuous video.

[0004] Optical image stabilization uses a purely optical method for correction, which is more reliable than digital image stabilization. It still has advantages in low light conditions, while also enabling faster focusing, more stable images, and clearer, more natural images.

[0005] Spring-loaded OIS is a technology used in camera and mobile phone photography to reduce image blur caused by camera shake. Spring-loaded OIS uses springs and mechanical structures to allow for minute displacements of the lens or sensor during shooting, thereby counteracting the effects of hand shake or other external vibrations.

[0006] To ensure the consistency of spring stiffness in the motion direction, existing spring-type OIS mainly employs two methods: one is a double-support structure with side-mounted flat springs, and the other is a single-support structure with springs bent perpendicular to the optical axis to form a suspension wire-like structure, or a connector is designed in the perpendicular optical axis direction to connect the two side-mounted springs. The former can lead to multi-modal motor operation, while the latter's bending in the perpendicular optical axis direction and the accuracy of the connecting parts can easily affect the consistency of the stiffness value of the OIS springs. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned problems by providing a lens driving device, camera module, and electronic device that can solve the above-mentioned technical issues.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A lens driving device includes a base and a moving frame that moves relative to the base in a plane perpendicular to the optical axis. The base and the moving frame are connected by a plurality of spring contacts. Each spring contact includes a first cantilever plate extending along a first direction in the plane and a second cantilever plate extending along a second direction in the plane. The first cantilever plate and the second cantilever plate are connected by a corner plate. The first direction and the second direction are set at an angle.

[0010] Furthermore, the thickness of the first cantilever plate extending in the plane perpendicular to the first direction is less than the thickness extending in the optical axis direction, and the thickness of the second cantilever plate extending in the plane perpendicular to the second direction is less than the thickness extending in the optical axis direction.

[0011] Furthermore, the thickness of the projection of the spring sheet onto the plane is the same from one end to the other.

[0012] Furthermore, the thickness of the spring sheet extending along the optical axis is the same from one end to the other.

[0013] Furthermore, the length of the first cantilever plate in the first direction and the length of the second cantilever plate in the second direction may be equal or unequal.

[0014] Furthermore, the base is provided with a column, the moving frame is provided with a protruding column, at least a portion of the first cantilever plate is fixed to the column, and at least a portion of the second cantilever plate is fixed to the protruding column.

[0015] Furthermore, the outer peripheral surface of the column has an outer peripheral plane parallel to the optical axis, at least a portion of the first cantilever piece is attached to the outer peripheral plane and the two surfaces are glued together, the outer end of the protruding column has an end plane parallel to the optical axis, and at least a portion of the second cantilever piece is attached to the end plane and the two surfaces are glued together.

[0016] Furthermore, the outer periphery of the base and the moving frame forms four corner spaces, each of which accommodates a piece of the spring.

[0017] As an application solution, this application also provides a camera module, which includes the lens driving device described above.

[0018] As an application solution, this application also provides an electronic device, which includes the aforementioned camera module.

[0019] Compared with existing technologies, the advantages of this application are: setting a spring between the base and the moving frame effectively solves the problem that the spring in the moving frame of the anti-shake mechanism cannot guarantee uniform stiffness and rebound force in the direction of movement in the existing anti-shake mechanism. At the same time, this structure effectively simplifies the design and manufacturing cost of the anti-shake mechanism. Attached Figure Description

[0020] Figure 1 This is an assembly drawing of the main structure of the lens driving device of this utility model without a housing;

[0021] Figure 2 for Figure 1 Assembly drawing of the main structure of the middle lens drive device without shims;

[0022] Figure 3 This is a detailed cross-sectional view of a component in the lens driving device of this utility model;

[0023] Figure 4 This is an exploded view of the upper left main component of the lens driving device of this utility model;

[0024] Figure 5 This is an exploded detail view of the lower left main component of the lens driving device of this utility model;

[0025] Figure 6 This is an assembly diagram of the base and connecting components on the base of this utility model;

[0026] Figure 7 This is an assembly drawing of the main components of the focusing frame of this utility model;

[0027] Figure 8 Here are detailed drawings of the moving frame and the moving frame roof component of this utility model;

[0028] Figure 9 This is a detailed drawing of the bottom drive component of the moving frame of this utility model;

[0029] Figure 10 This is a structural diagram of the main body of a first spring clip in Embodiment 2;

[0030] Figure 11 This is a structural diagram of a second spring clip in Embodiment 2;

[0031] Figure 12 This is a schematic diagram illustrating an example of a camera module being assembled in an electronic device in Embodiment 4.

[0032] In the figure, the components are: base 1, column 10, outer peripheral plane 100, shell 2, inner wall of shell 20, moving frame 3, protrusion 30, protrusion top surface 300, damping rod insertion hole 301, protrusion 31, end plane 311, damping rod 4, pad 40, first drive mechanism 5, first magnet group 50, first coil group 51, focusing frame 6, second drive mechanism 7, second magnet group 70, second coil group 71, spring 8, first cantilever plate 80, second cantilever plate 81, corner plate 82, first axis X, second axis Y, first spring S1, first bullet plate S10, second bullet plate S11, conductive terminal S12, second spring S2, inner fixing part S20, outer fixing part S21, anti-shake spring wire S3, damping structure S4, focusing spring wire S5, first mounting part S53, second mounting part S54, optical axis Z, and plane xY. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] Example 1

[0038] like Figure 1-Figure 2 As shown, the lens driving device in this embodiment includes a base 1 and a moving frame 3 that moves relative to the base 1 in a plane perpendicular to the optical axis Z. The moving frame 3 serves as the image stabilization carrier for the lens in the system, and the moving frame 3 is connected to the base 1 by a number of spring pieces 8.

[0039] In this embodiment, as Figure 2 As shown, the outer periphery of the base 1 and the moving frame 3 forms four corner spaces, each corner space accommodating a spring piece 8. Each spring piece 8 extends in two different directions on the plane to form a two-dimensional spring piece structure; specifically, as shown... Figure 6 As shown, the thickness of the spring piece 8 extending along the optical axis Z is the same from one end to the other. At the same time, the projection of the spring piece 8 onto the plane xY is an L-shaped spring piece of uniform thickness. The structural characteristics of the L-shaped design allow the spring piece 8 to provide a more uniform rebound effect when it makes a small displacement. In addition, the L-shaped structure can make more efficient use of space. Compared with traditional vertical or horizontal structures, it can provide better support performance in a limited space. The uniform thickness of the spring piece can ensure that the force borne by the spring piece 8 is evenly distributed during use, ensuring that when the moving frame 3 moves in the plane xY, it receives the same amount of force in all directions when it moves the same distance.

[0040] like Figure 6 and Figure 8 As shown, a column 10 is provided on the base 1, and a protruding column 31 is provided on the moving frame 3. At least a portion of the first cantilever piece 80 and the column 10 are fixed together by surface-to-surface contact and adhesive bonding. At least a portion of the second cantilever piece 81 and the protruding column 31 are fixed together by surface-to-surface contact and adhesive bonding. The spring piece 8 only needs to be glued for positioning with the base 1 and the moving frame 3, and no welding or other processes are required.

[0041] In this embodiment, the outer peripheral surface of the column 10 has an outer peripheral plane 100 parallel to the optical axis Z. At least a portion of the surface of the first cantilever piece 80 is attached to the outer peripheral plane 100 and the two surfaces are glued together. The outer end of the protruding column 31 has an end plane 311 parallel to the optical axis Z. At least a portion of the surface of the second cantilever piece 81 is attached to the end plane 311 and the two surfaces are glued together. The first cantilever piece 80 and the second cantilever piece 81 form a relatively stable connection structure by being in close contact with the outer peripheral plane 100 and the end plane 311 of the protruding column 31. The connection between the cantilever piece and the protruding column 31 is designed to be compact, which can effectively reduce the volume of the overall structure of the connection mechanism.

[0042] Specifically, the aforementioned spring piece 8 includes a first cantilever piece 80 extending along a first direction in the plane xY, and a second cantilever piece 81 extending along a second direction in the plane xY in cooperation with the first cantilever piece 80. In this embodiment, the projections of the two on the plane xY are perpendicular to each other. The first cantilever piece 80 and the second cantilever piece 81 are connected by a corner piece 82, which is an arc-shaped transition piece, but can also be designed as a wave-shaped transition piece, etc., depending on the actual situation. The first cantilever piece 80 mainly provides a vector rebound force in the second direction for the moving frame 3 in the plane xY. When the moving frame 3 moves relative to the base 1 in the second direction in the plane xY, the first cantilever piece 80 can synchronously apply a reaction force to the moving frame 3. Similarly, the second cantilever piece 81 mainly provides a vector rebound force in the first direction for the moving frame 3 in the plane xY. Its function is the same as that of the first cantilever piece 80. The difference is that the vector forces applied by the two to the moving frame 3 are in different directions. The thickness of the first cantilever plate 80 extending in the plane xY perpendicular to the first direction is less than the thickness extending in the optical axis Z direction, and the thickness of the second cantilever plate 81 extending in the plane xY perpendicular to the second direction is less than the thickness extending in the optical axis Z direction.

[0043] Depending on the specific operation, the length of the first cantilever plate 80 in the first direction and the length of the second cantilever plate 81 in the second direction can be designed to be equal or unequal. In this embodiment, the length of the first cantilever plate 80 is less than the length of the second cantilever plate 81. Since the spring plate 8 is centrally symmetrically distributed in the plane xY about the optical axis Z in this embodiment, the spring plate 8 will not have different reaction forces in different directions due to the unequal lengths of the first cantilever plate 80 and the second cantilever plate 81.

[0044] Example 2

[0045] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the lens driving device of Embodiment 1, this embodiment will explain and describe the other components in the lens driving device.

[0046] like Figure 3As shown, the lens driving device includes a base 1 located at the bottom and a housing 2 connected to the base 1 at the top. The two are combined to form a cavity, in which various components of the lens driving device are arranged, including a moving frame 3 that moves in a plane xY perpendicular to the optical axis Z under the drive of the first driving mechanism 5. The moving frame 3 is used for lens image stabilization, and a focusing frame 6 that is at least partially located in the moving frame 3 and moves along the optical axis Z under the drive of the second driving mechanism 7. The moving frame 3 and the focusing frame 6 work together to achieve the effects of image stabilization and focusing.

[0047] Specifically, a first spring S1 is used to fix the base 1, the moving frame 3, and the focusing frame 6 together, and a second spring S2 is used to fix the housing 2, the moving frame 3, and the focusing frame 6 together.

[0048] When the first spring S1 connects the base 1, the moving frame 3, and the focusing frame 6, a certain space exists between the base 1 and the moving frame 3. The first driving mechanism 5 is disposed between the base 1 and the moving frame 3. Specifically, the first driving mechanism 5 is at least partially disposed on the base 1, and the remaining part of the first driving mechanism 5 is disposed on the moving frame 3. In this embodiment, the first driving mechanism 5 includes several first magnet groups 50 fixed to the moving frame 3 and several first coil groups 51 fixed to the base 1. Each group of first magnet groups 50 corresponds to a group of first coil groups 51. Preferably, in this embodiment, each corresponding group of first magnet groups 50 and first coil groups 51 is designed to be distributed vertically at intervals.

[0049] In this embodiment, the second driving mechanism 7 is disposed between the focusing frame 6 and the moving frame 3. At least a portion of the second driving mechanism 7 is disposed in the moving frame 3, and the remaining portion is disposed in 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 a second coil group 71 in the second driving mechanism 7 is wound around the circumferential outer wall of the focusing frame 6. The outer wall of the focusing frame 6 is designed as a cylinder for easy winding. In other embodiments, the second coil group 71 may 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 of the side-wound coil is perpendicular to the optical axis Z.

[0050] To further explain, in this embodiment, the specific structures of the first spring S1 and the second spring S2 are as follows: Figures 10-11 As shown, the first spring S1 and the second spring S2 have common features as well as different features. The common features include several anti-shake spring wires S3 and several focusing spring wires S5. Preferably, in this embodiment, the number of anti-shake spring wires S3 is four, and each anti-shake spring wire S3 is connected to a pair of focusing spring wires S5.

[0051] The housing 2 is a square housing. When the base 1 and the housing 2 are fastened together, a square cavity is formed inside. A pair of focus spring wires S5 and a stabilizing spring wire S3 are distributed in each corner of the square cavity to make full use of the corner space, so that the overall structure of the lens driving device in this embodiment is more compact.

[0052] Furthermore, each image stabilization spring wire S3 is connected to the base 1 and the moving frame 3, and each focusing spring wire S5 is connected to the moving frame 3 and the focusing frame 6.

[0053] The focusing spring wire S5 consists of at least a portion distributed in the X direction and at least a remaining portion distributed in the Y direction. The elastic wires distributed in the X and Y directions are perpendicularly connected, and the elastic wires are, for example, U-shaped. Of course, multiple U-shaped elastic wires can be distributed in the X and Y directions. For example, two connected U-shaped elastic wires can be distributed in the Y direction. In other embodiments, a portion of the focusing spring wire S5 can be along a curved section that is angled to both the X and Y directions.

[0054] Two focusing spring wires S5 are located along one pair of diagonals of the square chamber, and the other two focusing spring wires S5 are located along the other pair of diagonals of the square chamber. Centered on the optical axis, the two focusing spring wires S5 located along one pair of diagonals of the square chamber are mirror images of each other.

[0055] The anti-shake spring wire S3 includes two coils connected in sequence, with the two coils distributed on opposite sides of a corresponding diagonal and on a vertical line perpendicular to the corresponding diagonal. Each coil has multiple U-shaped sub-coils with oppositely distributed U-shaped openings.

[0056] The different features of the first spring S1 and the second spring S2 include: during the focusing motion, the first spring S1 provides power to the second drive mechanism 7. Specifically, the first spring S1 is further divided into a first bullet S10 and a second bullet S11. The first bullet S10 and the second bullet S11 are electrically connected to the second coil group 71 respectively. The design of the two bullet groups can control the forward and reverse current flow in the second coil group 71, thereby controlling the driving direction of the electromagnetic force. The bullet end is connected to the conductive terminal S12 on the base 1.

[0057] Two of the four focusing spring wires S5 are connected to the first bullet piece S10, and the remaining two focusing spring wires S5 are connected to the second bullet piece S11.

[0058] Secondly, each focusing spring wire S5 and image stabilization spring wire S3 are connected by a first mounting part S53, the first bullet piece S10 and the second bullet piece S11 are fixed to the focusing frame 6, and the first mounting part S53 is fixed to the moving frame 3. The first mounting part S53 may have a ring-shaped structure, etc.

[0059] In addition, each anti-shake spring wire S3 has a second mounting part S54 connected to the end away from the focusing spring wire S5. The second mounting part S54 is plate-shaped and fixed to the base 1. The first spring piece S1 is fixed by means of glue or other methods.

[0060] The second spring S2 serves as an elastic reset and limiter during focusing and image stabilization. The second spring S2 also includes an inner fixing member S20 and an outer fixing member S21, both of which 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.

[0061] The inner fixing member S20 is preferably circular, and four focusing spring wires S5 are connected to the outside of the inner fixing member S20. The outer fixing member S21 is preferably square, and an anti-shake spring wire S3 is connected to each of the four corners of the outer fixing member S21.

[0062] The inner fixing component S20 is fixed to the focusing frame 6, and the outer fixing component S21 is fixed to the top surface of the housing 2. The second spring S2 is fixed by means of adhesive or other methods.

[0063] In other implementations, the number of image stabilization springs S3 can be two or three. The number of focusing springs S5 varies with the number of image stabilization springs S3, as long as the number of both remains consistent.

[0064] It exhibits excellent resilience in any direction on the xY plane. Because the moving frame 3 moves in the xY plane during image stabilization, the spring-loaded design ensures that the moving frame 3 receives a uniform rebound force regardless of the direction of movement on the xY plane. This characteristic is particularly important for image stabilization performance because, in practical applications, vibrations are usually multi-directional, not limited to a single direction.

[0065] like Figures 10-11 As shown, the difference between the first spring S1 and the second spring S2 is that the first spring S1 is a two-part spring design, which is designed to achieve independent open-loop current control. The second spring S2, on the other hand, is a one-piece spring design.

[0066] Its lens drive includes a base 1 and a housing 2 connected to the base 1, and a moving frame 3 that moves in a plane xY perpendicular to the optical axis Z. The base 1 and the housing 2 are connected to each other to form a working space, in which the moving frame 3 for image stabilization is placed.

[0067] This embodiment also includes a damping structure S4 partially connecting the moving frame 3. The damping structure S4 provides a flexible support, making the moving frame 3 more stable during movement, preventing jitter and displacement caused by irregular movement, and ensuring the lens remains in the ideal optical position. The damping structure S4 in this design includes several damping rods 4 distributed along the optical axis Z, such as… Figure 8 As shown, the moving frame 3 is also designed with a damping rod insertion hole 301 that cooperates with the damping rod 4, and there is damping rubber in the damping rod insertion hole 301.

[0068] Specifically, in this embodiment, there are four sets of damping rods 4 and damping rod insertion holes 301, which are evenly distributed around the circumference of the moving frame 3. In this embodiment, both the housing 2 and the moving frame 3 are square. To maintain the stress stability of each structure, each damping rod 4 is designed at the center position 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 fit between each set of damping rods 4 and the damping rod insertion hole 301 adopts the method of injecting damping adhesive. This not only provides a certain degree of freedom but also ensures the smoothness of movement. The damping rod insertion hole 301 is a stepped blind hole. The different heights of the stepped blind hole can be adjusted according to actual needs to increase or decrease the amount of damping adhesive and the contact surface, thereby enhancing the buffering effect and effectively absorbing vibrations and impacts.

[0069] In existing technologies, when performing anti-shake actions, the damping adhesive structure is basically designed in the gap between the base 1 and the moving frame 3, which results in the loss of some space in the base and makes it impossible to maximize the use of the thrust in the space of the base 1. The gap is also small, and the damping effect cannot be designed in a gradient manner. Preferably, this design provides a damping rod insertion hole 301 on the raised top surface 300 of the moving frame 3, into which the damping adhesive is injected, which effectively solves the defects in the existing technology and greatly reduces the processing cost.

[0070] One end of the damping rod 4 is inserted into the damping rubber in the damping rod insertion hole 301 to provide a buffering effect. The other end of the damping rod 4 is connected to the top of the inner wall 20 of the housing in the aforementioned working space. Specifically, the damping rod 4 is connected to the inner wall 20 of the housing 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 housing, which provides a relatively fixed effect with the base 1. The moving frame 3 can perform anti-shake under the restriction of the damping rod 4, thereby effectively resisting the influence of external vibration on the lens system.

[0071] During anti-shake operation, when external vibration or hand tremor acts on the moving frame, the damping rubber 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 subjected to the first impact, or reduce the jerking sensation brought by the drive mechanism during anti-shake movement.

[0072] In addition, the relative fixation between the damping rod and the shell achieves structural stability, making it difficult for the moving frame to deviate from its predetermined path during large-amplitude movements.

[0073] In this embodiment, another design scheme for the damping rod 4 and the damping rod insertion hole 301 is also provided. In this design, several 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 conjunction with this, since the damping rod 4 needs to be designed to be inserted vertically 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 housing. This design scheme can still achieve the effect of the original design.

[0074] like Figure 6 and Figure 9 As shown, the first drive mechanism 5 includes a first magnet group 50 and a first coil group 51. There are four groups of first magnet groups 50 and first coil groups 51, which are respectively arranged on one side of the four sides of the moving frame 3. One group of first magnet groups 50 and first coil groups 51 controls the moving frame 3 to move along the X direction perpendicular to the optical axis Z. Another group of first magnet groups 50 and first coil groups 51 controls the moving frame 3 to move along the Y direction perpendicular to the optical axis Z and the X direction. A magnet receiving groove is designed on the protrusion 30 on the moving frame 3 near the bottom of the base 1. The first magnet group 50 is fixed in the magnet receiving groove (that is, the remaining part of the first drive mechanism 5 is located on the protrusion 30). Specifically, the first magnet group 50 is designed as a Heilbeck array structure. This structure design reduces the size of the motor and increases the power density of the drive component.

[0075] In this embodiment, no position detection sensor is installed between the moving frame 3 and the base 1. The moving frame 3 is suspended and supported by the first spring S1 and the second spring S2. Since both the first spring S1 and the second spring S2 follow Hooke's Law F=kx, and the first coil group 51 and the first magnet group 50 conform to the Lorentz force law, when the moving frame 3 needs to be moved a specified distance in a specified direction, because the value of spring k in Hooke's Law is determined, the force and the amount of spring deformation are linearly related. By passing a pre-calculated current or a set of current values ​​through at least one first coil group 51, the generated Lorentz force can drive the moving frame 3 to move a specified distance and direction. Therefore, the final moving position of the moving frame 3 can be basically determined without feedback on 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. This reduces the application of position sensors and lowers costs.

[0076] like Figures 4-5 As shown, the focusing frame 6 is set inside the moving frame 3 and moves along the optical axis Z.

[0077] A second drive mechanism 7 is also provided between the focusing frame 6 and the moving frame 3. The second drive mechanism 7 includes a second magnet group 70 disposed in the magnet receiving groove. Specifically, the second magnet group 70 is designed to be close to the inner side wall of the moving frame 3. The second coil group 71 that cooperates 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.

[0078] Furthermore, the synergistic effect of the second drive mechanism 7 and the first drive mechanism 5 enables more complex focusing and image stabilization modes, such as fast focusing 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; while when precise shooting is required, fine adjustments can be made by precisely controlling the current of the second coil group 71.

[0079] Example 3

[0080] The structure and principle of this embodiment are basically the same as those of Embodiment 1. The difference lies in that, for the lens driving device of Embodiment 1, the camera module of this embodiment includes a lens driving device.

[0081] Camera modules are used in electronic devices, including 3C products such as computers, mobile smartphones (such as mobile phones, tablets, etc.), and digital cameras. In this embodiment, the module is used as a camera imaging component of a mobile smartphone.

[0082] Example 4

[0083] The structure and principle of this embodiment are basically the same as those of Embodiment 3. The difference lies in that, for the camera module of Embodiment 3, the electronic device of this embodiment includes a camera module.

[0084] Electronic devices are devices that use electrical energy for information processing, transmission, and storage. They are widely used in various fields, including communication, computing, entertainment, medical, and industrial applications. The camera component in electronic devices refers to the component used to capture images and videos, and is widely used in devices such as smartphones, tablets, monitoring systems, and digital cameras.

[0085] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A lens driving device, comprising a base (1) and a movable frame (3) that moves relative to the base (1) in a plane (xY) perpendicular to the optical axis (Z), wherein the base (1) and the movable frame (3) are connected by a plurality of spring contacts (8), characterized in that, The spring piece (8) includes a first cantilever piece (80) extending along a first direction on the plane, and a second cantilever piece (81) extending along a second direction on the plane. The first cantilever piece (80) and the second cantilever piece (81) are connected by a corner piece (82), and the first direction and the second direction are set at an angle.

2. The lens driving device according to claim 1, characterized in that, The thickness of the first cantilever plate (80) extending in the plane (xY) perpendicular to the first direction is less than the thickness extending in the optical axis (Z) direction, and the thickness of the second cantilever plate (81) extending in the plane (xY) perpendicular to the second direction is less than the thickness extending in the optical axis (Z) direction.

3. The lens driving device according to claim 1, characterized in that, The thickness of the projection of the spring piece (8) onto the plane is the same from one end to the other.

4. The lens driving device according to claim 1, characterized in that, The thickness of the spring sheet (8) extending along the optical axis (Z) is the same from one end to the other.

5. The lens driving device according to claim 1, characterized in that, The length of the first cantilever plate (80) in the first direction and the length of the second cantilever plate (81) in the second direction are equal or unequal.

6. The lens driving device according to claim 1, characterized in that, The base (1) is provided with a column (10), and the moving frame (3) is provided with a protruding column (31). At least a portion of the first cantilever plate (80) is fixed to the column (10), and at least a portion of the second cantilever plate (81) is fixed to the protruding column (31).

7. The lens driving device according to claim 6, characterized in that, The outer peripheral surface of the column (10) has an outer peripheral plane (100) parallel to the optical axis (Z), at least a portion of the surface of the first cantilever piece (80) is attached to the outer peripheral plane (100) and the two surfaces are glued together. The outer end of the protruding column (31) has an end plane (311) parallel to the optical axis (Z), and at least a portion of the surface of the second cantilever piece (81) is attached to the end plane (311) and the two surfaces are glued together.

8. The lens driving device according to claim 1, characterized in that, The outer periphery of the base (1) and the moving frame (3) forms four corner spaces, each of which contains a piece of the spring (8).

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

10. An electronic device, characterized in that, The electronic device includes the camera module as described in claim 9.

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