Lens driving mechanism, camera module and electronic equipment

Abstract

The utility model relates to a lens driving mechanism, camera module and electronic equipment, which comprises a base and a support which is driven by a first driving assembly to move relative to the base on a plane perpendicular to an optical axis, three moving component groups are arranged between the support and the base, and the projections of the moving component groups on the plane are in triangular distribution. And the moving component group is in movable contact with the bracket and / or the base. Compared with the prior art, the utility model has the advantages that: for moving components, more flexible movement in multiple directions can be allowed by triangular distribution, a more complicated movement track can be realized by optimizing the position and arrangement, so that the precision of an optical axis is improved, the triangular arrangement is generally more compact, and a larger supporting effect can be realized in a limited space.

Description

TECHNICAL FIELD

[0001] The utility model belongs to digital photography equipment field, especially relate to a lens drive mechanism, camera module and electronic equipment. BACKGROUND

[0002] The lens drive mechanism is a device for precisely controlling the position of an optical lens and preventing jitter, widely used in fields such as cameras, microscopes, laser devices and optical communication systems. Its main function is to adjust the position of the lens in the optical path through precise mechanical or electrical control to achieve the best imaging effect and optical performance.

[0003] In the prior art, the movement members between the bracket and the base are all distributed in four corners, and the synchronization and overall coordination of the four movement members may require complex mechanical design and precise adjustment, increasing the difficulty of installation and maintenance. At the same time, since the movement members are evenly distributed in four corners, the motion behavior of all movement members may be highly dependent on symmetry, and any small deviation may lead to uncoordinated overall movement, thereby affecting the accuracy and stability of the system. SUMMARY

[0004] The utility model aims at the above problem, provides a lens drive mechanism, camera module and electronic equipment that can solve the above technical problem.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] The lens drive mechanism comprises a base and a bracket moving relative to the base in a plane perpendicular to the optical axis through the driving of a first driving assembly, three groups of movement member groups are arranged between the bracket and the base, the projections of the three groups of movement member groups on the plane are in triangular distribution, and the movement member groups are in movable contact with the bracket and / or the base.

[0007] Further, the three groups of movement member groups are distributed at three corners of an isosceles triangle or an equilateral triangle.

[0008] Further, each movement member group is a group of spherical bodies having at least a plurality of arc-shaped convex surfaces, and the arc-shaped convex surfaces are in movable contact with the bracket and / or the base.

[0009] Further, each movement member group comprises a plurality of rolling spherical bodies, and the rolling spherical bodies are in movable contact with the bracket and the base, respectively.

[0010] Further, at least part of the rolling ball is accommodated in an accommodation groove, and one of the base and the support is provided with the accommodation groove, and the other of the base and the support is provided with a plane in contact with the rolling ball, at least part of the plane being located in the accommodation groove or outside the accommodation groove.

[0011] Further, the support is connected to the base through a supporting assembly, and at least part of the first driving assembly is arranged in the support, and the remaining part of the driving assembly is arranged in the base, and the at least part of the first driving assembly and the remaining part of the driving assembly cooperate to drive the support to move in the first direction and the second direction of the plane.

[0012] Further, the supporting assembly comprises a supporting spring sheet, at least part of the supporting spring sheet being connected to the base, and the remaining part of the supporting spring sheet being connected to the support.

[0013] Further, the supporting assembly comprises a spring sheet and a suspension wire, one end of the suspension wire being connected to the base, and the other end of the suspension wire being connected to the spring sheet connected with the support.

[0014] As a practical scheme, the application further provides a camera module, which comprises the lens driving mechanism.

[0015] As a practical scheme, the application further provides an electronic device, which comprises the camera module.

[0016] Compared with the prior art, the application has the advantages that for the moving member, the triangular distribution can allow more flexible movement in multiple directions, and through optimization of position and arrangement, more complex movement trajectories can be realized, thereby improving optical axis precision, and the triangular arrangement is generally more compact, and can realize larger supporting effect in limited space. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an assembly drawing of the main part of the columnar lens driving mechanism of the utility model;

[0018] Figure 2 It is an assembly drawing of the main part of the columnar lens driving mechanism of the utility model; Figure 1 It is an enlarged view of the main part in area A;

[0019] Figure 3 It is an assembly explosion left front view of the main part of the columnar lens driving mechanism of the utility model;

[0020] Figure 4 It is an assembly explosion left rear view of the main part of the columnar lens driving mechanism of the utility model;

[0021] Figure 5 is a transparent detail view of the column type base component of the present application;

[0022] Figure 6 is a top view detail view of the column type base component of the present application;

[0023] Figure 7 is an assembled left front view of the suspension wire type lens driving mechanism main component of the present application;

[0024] Figure 8 is an assembled view of the suspension wire type lens driving mechanism main component of the present application;

[0025] Figure 9 is a transparent detail view of the suspension wire type base component of the present application.

[0026] Figure 10 is an example schematic view of the electronic device in Example Five.

[0027] In the figure, the base 1, the column 10, the power supply circuit 11, the pin 12, the support 2, the elastic spring sheet 20, the first driving assembly 3, the first driving magnet 30, the first driving coil 31, the movement component group 4, the rolling ball 40, the arc convex surface 400, the accommodating groove 5, the supporting assembly 6, the supporting spring sheet 60, the suspension wire 61, the elastic component 7, the spring sheet 70, the carrier 8, the second driving assembly 9, the second driving magnet 90, the second driving coil 91, the optical axis Z, the plane xY. DETAILED DESCRIPTION

[0028] The application will be further described below in conjunction with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the application, and not to limit the application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the application are shown in the drawings, not all the structures.

[0029] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; 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; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] 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.

[0031] 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.

[0032] Example 1

[0033] like Figures 1-3 As shown, the lens driving mechanism includes a base 1 that carries internal components and connects external components, and a support 2 that moves relative to the base 1 in a plane xY perpendicular to the optical axis Z, driven by a first driving component 3. The base 1 and / or the support 2 have a square structure. In this embodiment, both the base 1 and the support 2 are square to allow for better component layout space. Advantageously, to ensure the smoothness of the relative movement between the base 1 and the support 2, three sets of motion component groups 4 are provided between the support 2 and the base 1, and their projections on the plane xY are triangularly distributed. Specifically, the three sets of motion component groups 4 are distributed at the three corners of an isosceles triangle or an equilateral triangle, such as... Figures 4-5 As shown, in this embodiment, two of the three sets of moving component groups 4 are distributed at two adjacent corners of the base 1, while the third set of moving component groups 4 is disposed at... Figure 5The middle part of the base 1 shown in the side view, this design can optimize the stability and flexibility of the device, three groups of motion components 4 are responsible for providing the support and movement ability of the base 1 in the plane xY, and the static and dynamic stability is enhanced by cooperative work. This layout can effectively disperse the pressure and impact from the external environment, improve the reliability of the system under various operating conditions, and the motion component group 4 is in active contact with the support 2 and / or the base 1, and each group of motion components 4 is a group of spherical bodies with at least several arc convex surfaces 400, which can effectively reduce friction and wear, thereby improving the smoothness and stability of movement; the arc convex surface 400 is in active contact with the support 2 and / or the base 1, and the several arc convex surfaces 400 are independent of each other and do not interfere with each other during movement.

[0034] Specifically, each motion component group 4 described above respectively includes several rolling spheres 40, and the arc convex surface 400 is composed of the surface of the rolling sphere 40. In this embodiment, one group of motion components 4 includes three rolling spheres 40, and the rolling sphere 40 described above is in active contact with the support 2 and the base 1 respectively through the arc convex surface 400 to reduce friction, thereby improving the smoothness and efficiency of movement. This design enables the support to move smoothly on the base, reduces wear and vibration, and provides better stability.

[0035] Meanwhile, as another embodiment, in this embodiment, the rolling sphere 40 described above is fixed with any one of the support 2 and the base 1, and the rolling sphere 40 is in active contact with the remaining one of the support 2 and the base 1. Fixing one rolling sphere 40 can effectively improve the stability of the entire structure. Since one of the contact points does not move with the movement, shaking and unnecessary vibration can be reduced, and the reliability of the support or device during operation can be improved.

[0036] Further, the lens driving mechanism described above further includes a containing groove 5, wherein at least part of the motion component group 4 is contained in the containing groove 5, one of the base 1 and the support 2 is provided with the containing groove 5, and the other of the base 1 and the support 2 is provided with a plane in contact with the rolling sphere 40. In some embodiments, the other of the base 1 and the support 2 is provided with a protruding portion protruding towards the containing groove 5, and the plane is shaped at one end of the protruding portion closest to the bottom of the containing groove 5. At least part of the protruding portion extends into the containing groove 5, so that the plane is in contact with the plurality of rolling spheres 40. At this time, the diameter of the rolling sphere 40 is smaller than the depth of the containing groove 5. In other embodiments, the plane is located outside the containing groove 5, and at this time, the diameter of the rolling sphere 40 is greater than the depth of the containing groove 5, so that part of the rolling sphere 40 protrudes out of the containing groove 5 and is in contact with the plane.

[0037] Two embodiments:

[0038] The first, the base 1 is provided with a containing groove 5, the support near one side of the base 1 and the containing groove 5 in the moving component group 4 active contact;The containing groove 5 is fixed on the base 1 simplifies the structure design, makes the overall structure more compact, easy to manufacture and assemble.

[0039] The second, the base and support 2 are provided with containing grooves 5, and the moving component group 4 is in active contact with the containing grooves 5 on the base and support 2 respectively;This design allows the moving component group 4 to remain stable in complex motion, such as providing smoother operation experience when performing fast anti-shake movement, greatly improving the reliability of the moving component group 4.

[0040] Embodiment two

[0041] The structure and principle of this embodiment are basically the same as those of embodiment one, and the difference is that for the lens driving mechanism of the above-mentioned embodiment one, this embodiment describes other main components related to the lens driving mechanism.

[0042] As shown in Figure 3 , regarding the lens driving mechanism, the base 1 is further provided with a support assembly 6 for bearing and connecting the above-mentioned support 2, in this embodiment, the support assembly 6 includes any one of a support spring 60 and a suspension wire 61, when using the support spring 60 as the support assembly 6, the flexibility and shock absorption performance of the overall structure can be effectively improved. In this design, at least part of the support spring 60 is connected to the above-mentioned column 10 of the base 1. These columns 10 are evenly distributed at the four corners of the base 1, as shown in Figure 6 , to provide stable support and good load distribution.

[0043] As another embodiment, as shown in Figures 7-8 , when using the suspension wire 61 as the support assembly 6, the design aims to provide higher flexibility and reliability to cope with different loads and operating conditions. One end of the suspension wire 61 is connected to the base 1, and the other end of the suspension wire 61 is connected to the elastic spring 20 connected with the support 2, and the connection points of each suspension wire 61 are evenly distributed on the edge of the base 1, ensuring that the force can be evenly distributed under dynamic load.

[0044] The lens driving mechanism of the present application also has a focusing function. Specifically, the support 2 is connected with a carrier 8 at least partially located in the support 2 through an elastic member 7. The carrier 8 can be driven by a second driving assembly 9 to move in the axial direction of the optical axis Z for focusing. The elastic member 7 includes a spring 70. In some embodiments, the spring 70 is connected with the support spring 60 at one end away from the column 10 and is used to at least partially conduct the second driving assembly 9. In other embodiments, the spring 70 is connected with the elastic spring 20 at one end, and the other end of the elastic spring 20 is connected with the suspension wire 61 and is used to at least partially conduct the second driving assembly 9.

[0045] In the present embodiment, the first driving assembly 3 and the second driving assembly 9 described above are both electromagnetic driving assemblies. The first driving assembly 3 is described in detail below. At least part of the first driving assembly 3 is arranged in the support 2, and the remaining part of the first driving assembly 3 is arranged in the base 1. The at least part of the first driving assembly 3 and the remaining part of the first driving assembly 3 cooperate to drive the support 2 to move in the first direction and the second direction in the plane xY.

[0046] Specifically, the first driving assembly 3 includes a first driving magnet 30 and a first driving coil 31. In the present embodiment, the design of the first driving assembly 3 takes into full consideration the difficulty of manufacturing and the stability of the mechanism. Therefore, the first driving magnet 30 is arranged on the support 2, which can effectively improve the stability of the assembly and reduce the complexity in the manufacturing process. The first driving coil 31 is arranged on the base 1. This configuration not only simplifies the structure, but also ensures the reliability and safety of the first driving coil 31 during operation.

[0047] Similarly, the design of the second driving assembly also takes into consideration the stability and working efficiency of the overall structure. Specifically, the second driving assembly 9 includes a second driving magnet 90 arranged on the support 2. This configuration can effectively avoid displacement caused by vibration or impact, thereby improving the reliability of the entire system. The second driving assembly 9 also includes a second driving coil 91 wound on the carrier 8. The second driving coil 91 is wound on the carrier 8, which not only facilitates maintenance and replacement, but also allows the winding method and wire material of the second driving coil 91 to be adjusted as needed to adapt to different working conditions and performance requirements.

[0048] It is specifically pointed out that the first driving magnet 30 and the second driving magnet 90 are at least partially in contact with each other in the present embodiment. The advantage of this is that the partial contact between the first driving magnet 30 and the second driving magnet 90 can improve the coupling efficiency of the magnetic field and improve the overall performance and response speed of the driving assembly.

[0049] Embodiment Three

[0050] The structure and principle of this embodiment are basically the same as those of Embodiment One and Embodiment Two, and the difference lies in that, for the lens driving mechanism of the above-mentioned Embodiment One and Embodiment Two, this embodiment specifically describes the conductive form of the second driving assembly.

[0051] As shown in Figure 3 and Figure 7 , in this embodiment, the second driving coil 91 provided on the carrier 8 is not directly connected with the power supply system provided on the base 1. Specifically, as shown in Figure 5 and Figure 9 , in this embodiment, the power supply circuit 11 is embedded inside the base 1, wherein the power supply circuit 11 receives external power supply through the pin 12 provided on the base 1, and at the same time, the power supply circuit 11 is partially connected with the supporting assembly 6 and supplies power to the supporting assembly 6, and supplies power to the second driving coil 91 of the second driving assembly 9 through the reed 70. The design of the power supply circuit 11 ensures that the electric energy can be efficiently managed, and the power flow is stable and reliable. The power supply circuit 11 is embedded in the above-mentioned base 1 during the manufacturing process by injection molding.

[0052] Embodiment Four

[0053] The structure and principle of this embodiment are basically the same as those of Embodiment One, Embodiment Two and Embodiment Three, and the difference lies in that, for the lens driving mechanism of the above-mentioned Embodiment One, Embodiment Two and Embodiment Three, this camera module includes a lens driving mechanism.

[0054] A camera module is a device used to adjust the position or focal length of a lens, usually through mechanical, electric or other means. The main function of the camera module is to adjust the position of the lens to control the focal length, focus or focus of the optical system.

[0055] Embodiment Five

[0056] As shown in Figure 10 , the electronic device includes a camera module, which refers to a modular component that integrates a camera, lens, sensor and other related elements together. The camera module usually includes image sensors, image processors, lenses, optical filters, focal length adjusters, autofocus modules and other elements, which can be directly used in various devices and applications, such as smartphones, tablets, surveillance cameras, vehicle-mounted cameras, etc.

[0057] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. Lens drive mechanism comprising a base (1) and a carrier (2) which is moved relative to the base (1) in a plane (xY) perpendicular to the optical axis (Z) by the drive of a first drive assembly (3), characterized in that The support (2) and the base (1) are provided with three groups of motion component groups (4) which are in triangular distribution on the plane (xY), and the motion component groups (4) are in active contact with the support (2) and / or the base (1).

2. The lens driving mechanism according to claim 1, characterized by, The three groups of motion component groups (4) are distributed at three angles of an isosceles triangle or an equilateral triangle.

3. The lens driving mechanism according to claim 1, characterized by, Each of the motion component groups (4) is a group of spherical bodies having at least a plurality of arc convex surfaces (400) which are in active contact with the support (2) and / or the base (1).

4. The lens driving mechanism according to claim 3, characterized by, Each of the motion component groups (4) includes a plurality of rolling spherical bodies (40) which are in active contact with the support (2) and the base (1) respectively.

5. The lens driving mechanism according to claim 4, characterized by, At least part of the rolling spherical bodies (40) are accommodated in an accommodation groove (5), and one of the base (1) and the support (2) is provided with the accommodation groove (5), and the other of the base (1) and the support (2) is provided with a plane in contact with the rolling spherical bodies (40), at least part of the plane being located in the accommodation groove (5) or outside the accommodation groove (5).

6. The lens driving mechanism according to claim 1, characterized by, The support (2) is connected to the base (1) through a supporting assembly (6), at least part of the first driving assembly (3) is arranged in the support (2), the remaining part of the first driving assembly (3) is arranged in the base (1), and the at least part of the first driving assembly (3) and the remaining part of the first driving assembly (3) cooperate to drive the support (2) to move in the first direction and the second direction of the plane (xY).

7. The lens driving mechanism according to claim 6, characterized by The supporting assembly (6) includes a supporting spring sheet (60), at least part of the supporting spring sheet (60) is connected to the base (1), and the remaining part of the supporting spring sheet (60) is connected to the support (2).

8. The lens driving mechanism according to claim 6, characterized by, The supporting assembly (6) includes a spring sheet (20) and a suspension wire (61), one end of the suspension wire (61) is connected to the base (1), and the other end of the suspension wire (61) is connected to the spring sheet (20) connected with the support (2).

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

10. An electronic device, characterized by The electronic device includes the camera module according to claim 9.

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