Lens driving device, camera module and electronic equipment

Abstract

The utility model relates to a lens driving device, a camera module and an electronic device, the lens driving device comprises a pedestal, a housing connected with the pedestal, a movable frame moving in a plane vertical to an optical axis, and a damping structure, at least part of the damping structure is connected to the inner wall of the side, away from the base, of the shell, and the remaining part of the damping structure is connected to the movable frame. The damping device has the advantages that the groove is formed in the upper surface of the movable frame, a damping structure in the prior art is designed to the top, therefore, a good driving space is formed between the movable frame and the base, then driving thrust is utilized to the maximum degree, meanwhile, the stepped blind hole is formed, and the effect of controlling different gradient damping according to the actual situation is achieved.

Description

Technical Field

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

[0002] Optical image stabilization (OIS) in mobile photography is a motion stabilization platform technology designed to reduce the effects of camera shake and vibration on image stability. Mobile photography often suffers from blurry and distorted images due to camera shake and object movement, which is where OIS technology plays a crucial role.

[0003] Camera optical image stabilization technology uses a mechanical stabilizer that uses the control unit's electronics and motion sensors to enable the camera to adapt to changes in the external environment. This technology detects the phone's shake and vibration based on external factors and compensates for these shakes and vibrations by controlling the lens position or camera sensor components. This ensures both image clarity and stability when shooting still photos or continuous motion video.

[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] Patent CN213186233U discloses an optical element drive mechanism comprising a fixed portion, a movable portion, a drive assembly, a sensing assembly, and a damping material. The optical element drive mechanism comprises a main shaft. The fixed portion comprises a rectangular structure surrounding the main shaft. The movable portion comprises a support seat for supporting the optical element and is movable relative to the fixed portion. The drive assembly drives the movable portion to move relative to the fixed portion. The sensing assembly senses the movement of the movable portion relative to the fixed portion. The damping material is disposed between the fixed portion and the movable portion.

[0006] In the aforementioned patents and prior art, a damping rubber structure is required for stabilizing the stabilization effect during the OIS operation. However, this design often creates a gap between the OIS actuator and the base, which results in a loss of base space and prevents maximum thrust utilization. Furthermore, the gap is too small to achieve a gradient damping effect. Utility Model Content

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

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A lens driving device includes a base and a shell connected to the base, and a movable frame that moves in a plane perpendicular to the optical axis. The lens driving device also includes a damping structure, at least a portion of which is connected to the inner wall of the shell on a side away from the base, and the remaining portion of the damping structure is connected to the movable frame.

[0010] Furthermore, the damping structure includes a plurality of damping rods distributed axially along the optical axis, one end of the damping rod is connected to the inner wall of the shell, and the other end of the damping rod is connected to the movable frame.

[0011] Furthermore, the other end of the damping rod is connected to a boss on the outer periphery of the moving frame.

[0012] Furthermore, a damping rod insertion hole is provided on the boss top surface of the boss, and the other end of the damping rod is inserted into the damping rod insertion hole and connected to the damping rod insertion hole.

[0013] Furthermore, the damping rod insertion hole is a stepped blind hole.

[0014] Furthermore, one end of the damping rod is connected to a gasket, and the gasket is fixed to the inner wall of the shell.

[0015] Furthermore, the damping rod and the gasket are vertically connected.

[0016] Furthermore, there are four damping rods, the housing is a square housing, and each of the damping rods is located at the center of a corresponding side wall of the housing.

[0017] The present application also provides a camera module, wherein the lens driving device is configured such that the movable frame is driven by a first driving component, a focusing frame is provided in the movable frame and moves axially along the optical axis, and the focusing frame is driven by a second driving component.

[0018] The present application also provides an electronic device, which includes the camera module.

[0019] Compared with the existing technology, the advantages of this application are: this design separates the grooves on the upper surface of the moving frame, and designs the damping structure in the existing technology to the top, so that there is a good driving space between the moving frame and the base, thereby maximizing the utilization of the driving thrust, and at the same time opening a stepped blind hole to achieve different gradient damping effects according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a diagram of the internal assembly of the lens driving device housing of the present invention;

[0021] Figure 2This is an exploded detailed front view of the main structure of the lens driving device of the present invention;

[0022] Figure 3 This is an exploded detailed rear view of the main structure of the lens driving device of the present invention;

[0023] Figure 4 This is a front view of the main structure details of the focus frame of the present invention;

[0024] Figure 5 This is a front view of the main structure details of the movable frame of the utility model;

[0025] Figure 6 This is a bottom view of the main structure details of the movable frame of the present utility model;

[0026] Figure 7 This is a schematic diagram of an example of the camera module electronic device in Example 3.

[0027] In the figure, the base 1, the shell 2, the inner wall of the shell 20, the moving frame 3, the boss 30, the boss top surface 300, the damping rod insertion hole 301, the damping rod 4, the gasket 40, the first driving component 5, the first driving magnet 50, the first driving coil 51, the focusing frame 6, the second driving component 7, the second driving magnet 70, the second driving coil 71, the optical axis Z, and the plane xY. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0029] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0032] Example 1

[0033] The lens driving device of this embodiment is as follows Figure 1-Figure 2 As shown, the lens drive system includes a base 1, a housing 2 connected to the base 1, and a movable frame 3 that moves within a plane xY perpendicular to the optical axis Z. The base 1 and housing 2 are connected to form a workspace, within which the movable frame 3, used for anti-shake, is placed. The movement of the movable frame 3 is achieved by a motor drive system, whose precise control can reduce image blur caused by external vibration or hand shaking. A series of sensors are installed on the movable frame 3, which can monitor environmental vibration in real time and provide feedback to the control system for timely adjustment of the movable frame's position.

[0034] When the moving frame 3 is performing anti-shake movement, external vibrations or hand shaking may affect the lens. Therefore, in this embodiment, a damping structure is also provided that is partially connected to the moving frame 3. The damping structure 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 the ideal optical position. The damping structure in this design includes a number of damping rods 4 distributed along the optical axis Z, such as Figure 5 As shown, a damping rod insertion hole 301 is also designed on the movable frame 3 to cooperate with the damping rod 4. The damping rod insertion hole 301 is set on the boss 30 on the outer periphery of the movable frame 3;

[0035] 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 movable frame 3. The housing 2 and movable frame 3 in this embodiment are both square in style. In order to maintain the force stability of each structure, this design designs each damping rod 4 in the center of the corresponding side of the housing 2 and the movable 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 glue (damping glue), which not only provides a certain degree of freedom but also ensures the smoothness 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, thereby enhancing the buffering effect and effectively absorbing vibration and impact.

[0036] 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 base space and cannot 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 boss 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.

[0037] One end of the damping rod 4 is inserted into the damping rubber in the damping rod insertion hole 301, which has a buffering effect. The other end of the damping rod 4 is connected to the top of the shell inner wall 20 in the above-mentioned working space. Specifically, the damping rod 4 is connected to the shell inner wall 20 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 shell inner wall 20, which has a relatively fixed effect with the base 1. The movable 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. Through this structural design, the movable frame 3 can still remain stable in a fast-moving or bumpy environment, thereby ensuring a clear and stable image.

[0038] During anti-shake operation, when external vibration or hand shaking acts on the moving frame, the colloidal part of the damping rod 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 original position when it is first impacted, or in the anti-shake movement, reduce the sense of frustration caused by the driving mechanism.

[0039] In addition, the relative fixation 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.

[0040] In this embodiment, another design scheme of the damping rod 4 and the damping rod insertion hole 301 is also provided. In this design, the damping rod insertion hole 301 is designed on the side wall of the above-mentioned boss 30. In conjunction 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. This design scheme can still achieve the effect of the original design.

[0041] Example 2

[0042] The structure and principle of this embodiment are basically the same as those of the first embodiment. The difference lies in that, in contrast to the lens driving device of the first embodiment, the camera module of this embodiment includes a lens driving device.

[0043] In this embodiment, the camera module further includes a first driving component 5 disposed between the base 1 and the moving frame 3. Figure 6 As shown, the first driving component 5 includes a first driving magnet 50 and a first driving coil 51. The boss 30 on the moving frame 3 is designed with a magnet receiving groove near the bottom of the base 1. The first driving magnet 50 is fixed in the magnet receiving groove. Specifically, the first driving magnet 50 is designed as a Halbach array structure. This structural design has the effect of reducing the volume of the motor and improving the power density of the driving component.

[0044] like Figure 3-Figure 4 As shown, a focus frame 6 is also provided in the lens driving device. The focus frame 6 is provided in the movable frame 3 and moves axially along the optical axis Z.

[0045] A second driving assembly 7 is also provided between the focusing frame 6 and the movable frame 3. The second driving assembly 7 includes a second driving magnet 70 arranged in the magnet receiving groove. It is particularly noted that the second driving magnet 70 is designed to be close to the inner wall of the movable frame 3, and the second driving coil 71 cooperating with the second driving magnet 70 is fixed on the outer peripheral side wall of the focusing frame 6 in a ring-shaped winding manner.

[0046] Furthermore, the synergy between the second drive assembly 7 and the first drive assembly 5 enables more complex focus and anti-shake modes, such as fast focus and fine adjustment. When the user needs to quickly align the subject, the second drive assembly 7 can quickly adjust the focus frame 6 to the target position. For precise shooting, the current flowing through the second drive coil 71 can be precisely controlled to achieve minute adjustments.

[0047] Example 3

[0048] The structure and principle of this embodiment are basically the same as those of the second embodiment. The difference lies in that, with respect to the camera module of the second embodiment, the electronic device of this embodiment includes a camera module.

[0049] like Figure 7As shown, the electronic device includes a lens driver. A camera module is a modular assembly that integrates a camera, lens, sensor, and other related components. A camera module typically includes an image sensor, image processor, lens, optical filter, focus adjuster, autofocus module, and other components. It can be directly used in a variety of devices and applications, such as smartphones, tablets, surveillance cameras, and automotive cameras.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A lens driving device comprising a base (1), a housing (2) connected to the base (1), and a moving frame (3) moving in a plane (xY) perpendicular to an optical axis (Z), characterized in that: The lens driving device further comprises a damping structure, at least part of which is connected to an inner wall (20) of the housing (2) on a side away from the base (1), and the remaining part of the damping structure is connected to the moving frame (3).

2. The lens driving device according to claim 1, wherein: The damping structure comprises a plurality of damping rods (4), one end of each damping rod (4) is connected to the inner wall (20) of the housing, and the other end of each damping rod (4) is connected to the moving frame (3).

3. The lens driving device according to claim 2, wherein: The other end of the damping rod (4) is connected to a boss (30) on the outer periphery of the moving frame (3).

4. The lens driving device according to claim 3, wherein: A damping rod insertion hole (301) is provided in the movable frame (3), and the other end of the damping rod (4) is inserted into the damping rod insertion hole (301) and connected to the damping glue in the damping rod insertion hole (301).

5. The lens driving device according to claim 4, wherein: The damping rod insertion hole (301) is a stepped blind hole.

6. The lens driving device according to claim 2, wherein: One end of the damping rod (4) is connected to a gasket (40), and the gasket (40) is fixed to the inner wall (20) of the housing.

7. The lens driving device according to claim 6, wherein: The damping rod (4) and the gasket (40) are vertically connected.

8. The lens driving device according to claim 2, wherein: There are four damping rods (4), the housing (2) is a square housing, and each damping rod (4) is located at the center of a corresponding side wall of the housing (2).

9. A camera module, characterized in that: The lens driving device comprises the lens driving device according to any one of claims 1 to 8, wherein the movable frame (3) is driven by a first driving component (5), a focusing frame (6) is provided in the movable frame (3) and moves axially along the optical axis (Z), and the focusing frame (6) is driven by a second driving component (7).

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

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