Inner focusing lens driving device, camera module and electronic equipment

Abstract

The utility model relates to an internal focusing lens driving device, a camera module and an electronic device, comprising a base, a first movable frame arranged on the base, and the first movable frame driven by a first driving group to move relative to the base on a plane perpendicular to an optical axis, the first movable frame is provided with a second movable frame and a carrier, the second movable frame is driven by a second driving set to move in the axial direction of the optical axis, the carrier is fixed relative to the base or the first movable frame, and the first movable frame is connected to the base. And a movement retainer for enabling the first movable frame to be in movable contact with the base is arranged between the first movable frame and the base. The anti-shake device has the advantages that the motion retaining piece is arranged between the base and the first movable frame, the phenomenon of unstable anti-shake in the prior art can be effectively solved, it is ensured that no redundant shake is generated between the first movable frame and the base in the optical axis direction, meanwhile, movement between the first movable frame and the base is more stable, and the anti-shake effect is better. And the anti-shake performance and the imaging quality of the whole device are improved.

Description

Technical Field

[0001] The present application relates to the field of electronic device photography, and in particular to an internal focus 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] The operating principle of the internal focus lens drive mechanism is based on changing the distance between the lens and the image sensor. When the drive mechanism is activated, it mechanically moves the lens group along a specific trajectory. The distance and direction of movement depend on the desired focusing distance. When the lens is moved closer to the sensor, nearby objects are in sharp focus; when the lens is moved further away from the sensor, distant objects are in sharp focus.

[0005] In the existing internal focus drive device, the anti-shake frame and the base are directly connected using suspension wires and springs. The elastic characteristics of the suspension system may lead to a reduced response sensitivity to small vibrations and impacts, making the anti-shake effect insufficient to cope with random and severe vibrations, affecting the stability and clarity of the final image. Summary of the Invention

[0006] The purpose of the present utility model is to provide an inner focus lens driving device, a camera module and an electronic device that can solve the above technical problems.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An internal focus lens driving device includes a base, a first movable frame is provided on the base, and the first movable frame moves relative to the base in a plane perpendicular to the optical axis under the drive of a first driving group, a second movable frame is provided on the first movable frame and moves axially along the optical axis under the drive of a second driving group, and a carrier fixed relative to the base or the first movable frame, the first movable frame is connected to the base, and a moving retaining member is provided between the first movable frame and the base so that the first movable frame and the base are in movable contact.

[0009] Furthermore, any one or both of the first movable frame and the base are in active contact with the movable retaining member.

[0010] Furthermore, the moving retaining member is a spherical component, and the first moving frame and the base are in movable contact with the moving retaining member respectively.

[0011] Furthermore, the first movable frame and / or the base is provided with a track groove for accommodating at least part of the moving retaining member.

[0012] Furthermore, the motion retaining member is a slide rail pair, at least a portion of the motion retaining member is provided on the base, and the remaining portion of the motion retaining member is in sliding engagement with the at least portion and the remaining portion is provided on the first movable frame.

[0013] Furthermore, a spring piece or a suspension wire group is connected between the base and the first movable frame.

[0014] Furthermore, the second movable frame is connected to the first movable frame through a first spring and a second spring spaced apart at the front and rear sides of the second movable frame;

[0015] The elastic piece is connected to the first spring.

[0016] Furthermore, a column for carrying the motion retaining member is provided on the base, and the track groove is provided at the top of the column.

[0017] The present application also provides a camera module, which includes the internal focus lens driving device.

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

[0019] Compared with the existing technology, the advantages of the present application are: the motion retaining member set between the base and the first movable frame in the present application can effectively solve the unstable anti-shake phenomenon in the existing technology, ensuring that the first movable frame and the base will not produce unnecessary shaking in the direction of the optical axis, and at the same time making the movement between the first movable frame and the base more stable, thereby improving the anti-shake performance and imaging quality of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an assembly diagram of the main structure of the suspension wire type internal focus lens driving device of the utility model;

[0021] Figure 2 for Figure 1 Detailed assembly diagram of the main structure of the center-focus lens drive device;

[0022] Figure 3 for Figure 1 A top view of the main structure assembly of the center-in focus lens drive device;

[0023] Figure 4 for Figure 1 Detailed cross-sectional view of the main structure assembly of the center-in focus lens drive device;

[0024] Figure 5 for Figure 1 Exploded front view of the main structure assembly details of the center-focus lens drive device;

[0025] Figure 6 for Figure 5 A magnified view of the details of the main components in area A;

[0026] Figure 7 for Figure 1 Lower left bottom view of the exploded details of the main structure assembly of the center-focus lens drive device;

[0027] Figure 8 for Figure 7 A magnified view of the details of the main components in the middle B area;

[0028] Figure 9 This is a front view of the main structure assembly of the suspension wire camera module of the utility model;

[0029] Figure 10 for Figure 9 Top view of the main structure assembly of the middle camera module;

[0030] Figure 11 This is a cross-sectional detail diagram of the main structure of the camera module of the present utility model;

[0031] Figure 12 This is a front view of the main structure assembly of the shrapnel-type camera module of the present invention;

[0032] Figure 13 for Figure 12 A magnified view of the details of the main components in the middle C area;

[0033] Figure 14 This is a schematic diagram of an electronic device in Example 5.

[0034] In the figure, base 1, suspension wire group 10, spring piece 11, ceiling elastic piece 12, column 13, first moving frame 2, second moving frame 3, first driving group 4, first driving coil 40, first driving magnet 41, second driving group 5, second driving coil 50, second driving magnet 51, first reed 6, second reed 7, moving retainer 8, track groove 80, prism carrier 9, optical axis Z, plane xY. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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. Example 1

[0039] In this embodiment, Figure 1-Figure 3As shown, the inner focus lens driving device includes a base 1, a first movable frame 2 is provided on the base 1, and the first movable frame 2 moves relative to the base 1 in a plane perpendicular to the optical axis Z under the drive of a first driving group 4, and a second movable frame 3 is provided on the first movable frame 2 and moves relative to the first movable frame 2 along the optical axis Z under the drive of a second driving group 5. In this embodiment, the second movable frame 3 is used to perform lens focusing movement, and the first movable frame 2 can drive the second movable frame 3 to perform anti-shake movement relative to the base 1, as shown in FIG. Figure 3 As shown, the second movable frame 3 is arranged in the hollow part in the middle of the first movable frame 2; the second movable frame 3 is connected to the first movable frame 2 by a first spring 6 and a second spring 7 spaced apart on the front and rear sides of the second movable frame 3 along the optical axis Z direction. This design allows the second movable frame 3 to perform moderate movement in the optical axis Z direction and can reset itself when not working.

[0040] Among them, Figure 3 As shown, the first spring piece 6 and the second spring piece 7 each have a curved serpentine structure on a plane xY perpendicular to the optical axis Z.

[0041] Specifically, if Figure 4 As shown, the first drive group 4 and the second drive group 5 are electromagnetic drive groups. In this embodiment, the first drive group 4 includes a first drive coil 40 arranged on the base 1 and a first drive magnet 41 arranged corresponding to the first drive coil 40, and the first drive magnet 41 is arranged on the first moving frame 2; the second drive group 5 includes a second drive magnet 51 arranged on the first moving frame 2, and a second drive coil 50 arranged on the second moving frame 3 corresponding to the second drive magnet 51.

[0042] The first moving frame 2 is connected to the base 1 via a suspension wire group 10 or a spring piece 11. In this embodiment, the first moving frame 2 is connected to the base 1 via the suspension wire group 10 to achieve flexible movement and stable support.

[0043] Specifically, at least a portion of the suspension wire group 10 is connected to the base 1, and at least a portion of the remaining suspension wire group 10 is connected to the top elastic sheet 12 of the first movable frame 2. The top elastic sheet 12 can be made of a highly elastic metal material to achieve good elastic performance while ensuring strength and durability. When the first movable frame 2 moves relative to the base 1, the top elastic sheet 12 will adaptively adjust its deformation to maintain the balance of the first movable frame 2 and ensure normal operation in complex environments. The top elastic sheet 12 is connected to the first spring 6, and the top elastic sheet 12 extends at the four corners of the first movable frame 2 in a direction away from the second movable frame 3.

[0044] Among them, Figure 5-Figure 7As shown, a moving retainer 8 is provided between the first moving frame 2 and the base 1 so that the first moving frame 2 and the base 1 can be in movable contact. Either or both of the first moving frame 2 and the base 1 can be in movable contact with the moving retainer 8. In this embodiment, the moving retainer 8 is a spherical component. The first moving frame 2 and the base 1 can be in movable contact with the moving retainer 8 respectively. When the first moving frame 2 and the base 1 move relative to each other, the moving retainer 8 rolls between the two, thereby achieving smooth relative movement. It can effectively reduce friction, improve movement efficiency, and also reduce wear on moving parts. The spherical design of the moving retainer 8 enables it to move freely at different angles and directions, which makes the relative position change between the first moving frame 2 and the base 1 more flexible.

[0045] like Figure 6-Figure 8 As shown, the above-mentioned motion retaining member 8 is arranged in the track groove 80 on the first movable frame 2 and the base 1, and the track grooves 80 of the first movable frame 2 and the base 1 are arranged opposite to each other up and down to form a space that can accommodate the motion retaining member 8, wherein the motion retaining member 8 in the space is at least partially in active contact with the track groove 80 provided on the first movable frame 2, and at least part of the remaining motion retaining member 8 is in active contact with the track groove 80 provided on the base 1, so that the motion retaining member 8 can be stably maintained therein during the movement process and is not easily deviated from the track due to external force or vibration.

[0046] Regarding the above-mentioned retaining moving member 8, as Figure 5 As shown, columns 13 for supporting the retaining moving part 8 are further provided on the four corners of the base 1, and the track groove 80 is provided on the top of the column 13. The moving retaining part 8 is placed in the track groove 80. The column 13 strengthens the overall structural strength of the entire internal focus lens driving device to a certain extent, supports the moving frame and part of the driving group in the direction of the optical axis Z, and helps limit the moving range of the first moving frame 2 in the plane xY.

[0047] To further enhance the functionality and durability of the design, the inner surface of the track groove 80 is treated with a wear-resistant material, such as an embedded metal sheet, to reduce the rolling friction of the moving retainer 8 and extend the service life of the track groove 80.

[0048] In order to enable macro photography, a carrier is fixed to the base 1 or the first movable frame 2. In this embodiment, a carrier is fixed to the top of the first movable frame 2, and the carrier is used to mount a lens. Example 2

[0049] The structure and principle of this embodiment are basically the same as those of the first embodiment. The difference lies in that this embodiment describes a new connection method for the connection relationship between the first movable frame and the base in the first embodiment.

[0050] like Figure 12-13 As shown, the first movable frame 2 is connected to the base 1 via a spring clip 11. The spring clip 11 acts as a flexible connector, installed between the base 1 and the top surface of the first movable frame 2. This design aims to provide an effective buffering and shock absorption function, capable of absorbing external impact forces during operation, thereby protecting key components from damage. The spring clip 11 is connected to the first spring 6;

[0051] The material of the spring clip 11 can be selected from high-strength synthetic rubber or metal alloy, which has good elasticity and durability and can maintain its performance during long-term use. By adjusting the thickness and hardness of the spring clip 11, connections with different stiffness characteristics can be achieved according to actual needs to adapt to various working environments and load conditions. The spring clip 11 has a cantilever portion between the base 1 and the first movable frame 2 that is bent once or multiple times in the X direction and / or Y direction. At the same time, the spring clip 11 can supply power to the first spring 6 and the second drive coil 50 through the metal parts and terminals in the base 1. Example 3

[0052] The structure and principle of this embodiment are basically the same as those of the first and second embodiments. The difference lies in that, with respect to the moving retaining member in the first embodiment, this embodiment describes another design method of the moving retaining member.

[0053] In this embodiment, the motion retaining member 8 is a slide rail pair, at least a portion of the motion retaining member 8 is provided on the base 1, and the remaining portion of the motion retaining member 8 is slidably fitted with the at least portion and the remaining portion is provided on the first movable frame 2, so that stable movement between the first movable frame 2 and the base 1 is achieved through effective sliding fit.

[0054] The configuration of the slide rail pair allows the first movable frame 2 to move freely in multiple directions in a plane perpendicular to the optical axis Z to achieve greater flexibility.

[0055] The slide rail pair can be a slide shaft and a corresponding groove, or a protrusion and a corresponding groove. Example 4

[0056] The structure and principle of this embodiment are basically the same as those of the first and second embodiments. The difference lies in that, with respect to the inner focus lens driving device of the first embodiment, the camera module of this embodiment includes an inner focus lens driving device.

[0057] like Figure 9-10 As shown, in this embodiment, the camera module not only includes the inner focus lens driving device in the above-mentioned embodiment 1, but also a prism refraction device is provided on the light-emitting side of the inner focus lens driving device;

[0058] The prism refraction device includes a prism carrier 9 fixed to the side of the base 1 away from the moving frame. Light enters the polygonal prism in the prism carrier 9 from the two lenses from top to bottom in the internal focus lens driving device, and the light path is changed through refraction, so that the light finally reaches the imaging area. The design purpose of the prism refraction device is to optimize the light transmission path and imaging quality.

[0059] like Figure 11 As shown, when light enters the prism carrier 9 from the internal focus lens drive device, it is first refracted on the first surface. The refraction angle is precisely calculated to ensure that the light is effectively redirected and follows the intended trajectory. After this initial refraction, the light continues to propagate internally, refracting again upon reaching the second tube surface, thus directing the light toward the imaging area.

[0060] By utilizing the prism refraction device, the design of the optical system can be effectively improved, achieving a smaller device size and a more flexible layout. Example 5

[0061] The structure and principle of this embodiment are basically the same as those of the fourth embodiment. The difference lies in that, compared with the camera module of the fourth embodiment, the electronic device of this embodiment includes a camera module.

[0062] Electronic devices are devices that use electrical energy to process, transmit and store information. They are widely used in various fields, including communications, computing, entertainment, medical care and industry. The camera part of an electronic device refers to the component used to capture images and videos. It is widely used in smartphones, tablets, surveillance systems, digital cameras and other devices.

[0063] 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. An internal focus lens driving device, comprising a base (1), a first movable frame (2) provided on the base (1), and the first movable frame (2) moving relative to the base (1) in a plane perpendicular to the optical axis (Z) under the drive of a first driving group (4), a second movable frame (3) being provided on the first movable frame (2) and moving axially along the optical axis (Z) under the drive of a second driving group (5), and a carrier fixed relative to the base (1) or the first movable frame (2), characterized in that: The first movable frame (2) is connected to the base (1), and a motion retaining member (8) is provided between the first movable frame (2) and the base (1) so as to enable the first movable frame (2) to be in movable contact with the base (1).

2. The inner focus lens driving device according to claim 1, wherein: Any one or both of the first movable frame (2) and the base (1) are in active contact with the moving retaining member (8).

3. The inner focus lens driving device according to claim 1 or 2, wherein: The moving retaining member (8) is a spherical component, and the first moving frame (2) and the base (1) are in movable contact with the moving retaining member (8) respectively.

4. The inner focus lens driving device according to claim 3, wherein: The first movable frame (2) and / or the base (1) are provided with a track groove (80) for accommodating at least part of the moving retaining member (8).

5. The inner focus lens driving device according to claim 1 or 2, wherein: The motion retaining member (8) is a slide rail pair, at least a portion of the motion retaining member (8) is provided on the base (1), and the remaining portion of the motion retaining member (8) is in sliding engagement with the at least portion and the remaining portion is provided on the first movable frame (2).

6. The inner focus lens driving device according to claim 1, wherein: A spring (11) or a suspension wire group (10) is connected between the base (1) and the first movable frame (2).

7. The inner focus lens driving device according to claim 6, wherein: The second movable frame (3) is connected to the first movable frame (2) via a first spring (6) and a second spring (7) spaced apart and distributed on the front and rear sides of the second movable frame (3); The elastic piece (11) is connected to the first spring (6).

8. The inner focus lens driving device according to claim 4, wherein: The base (1) is further provided with a column (13) for carrying the motion retaining member (8), and the track groove (80) is provided at the top of the column (13).

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

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

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