Lens driving device and lens module

Abstract

The utility model relates to optical anti -shake technical field especially relates to a lens drive arrangement and lens module, including OIS movable part and AF movable part, OIS movable part swing setting on the base, AF movable part swing setting in OIS movable part, OIS movable part contains OIS frame, two groups of first magnetic parts, second magnetic part and reinforcing part, and reinforcing part contains three first reinforcing parts with the magnetic conductive ability and one second reinforcing part of non -magnetic conductive, adopt the design of three -sided magnetic part, and the first reinforcing part with the magnetic conductive ability and the second reinforcing part of non -magnetic conductive are designed in the corresponding position of OIS frame, and the first reinforcing part with the magnetic conductive ability can increase the magnetic intensity of first magnetic part and second magnetic part, the second reinforcing part can reduce the magnetic interference of corresponding side, optimize the magnetic field utilization rate and the anti -magnetic interference ability, improve the anti -shake performance and reliability of lens drive arrangement.

Description

Technical Field

[0001] This utility model relates to the field of optical image stabilization technology, and in particular to a lens driving device and lens module. Background Technology

[0002] The demand for camera functions in portable electronic devices (such as tablets and smartphones) continues to grow rapidly. To meet the diverse imaging requirements of users, a lens drive device is usually added to the camera module. Optical compensation technology is used to compensate for motion during the shooting process, thereby improving image quality.

[0003] Currently available conventional lens drive devices may suffer damage to the moving part after being impacted during reliability testing or in the event of a drop during use. This can affect the accuracy of motion compensation and the overall quality and reliability.

[0004] It should be noted that the information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] To address the technical problem that the moving part of the existing lens driving device may be damaged after being impacted, this utility model provides a lens driving device, which includes a base. OIS movable part, the OIS movable part is movably mounted on the base; The movable part AF is movably disposed within the movable part OIS; The movable part of the OIS includes an OIS frame, two sets of first magnetic components, a second magnetic component, and a reinforcing component. The OIS frame is capable of translational movement relative to the base along a plane perpendicular to the optical axis. The two sets of first magnetic components are arranged opposite to each other and are respectively disposed on the three inner walls adjacent to the OIS frame with respect to the second magnetic components. The reinforcing member includes three first reinforcing members with magnetic conductivity and one second reinforcing member without magnetic conductivity. The three first reinforcing members are respectively embedded in the sidewalls of the OIS frame corresponding to the two sets of first magnetic members and second magnetic members. The second reinforcing member is embedded in the OIS frame and located on the side opposite to the second magnetic member.

[0006] Furthermore, the extension direction and length of the three first reinforcing members are respectively adapted to their corresponding first magnetic member or second magnetic member.

[0007] Furthermore, the extension direction and length of the second reinforcing member are adapted to the extension direction and length of the corresponding sidewall of the OIS frame.

[0008] Furthermore, the lens driving device also includes a first coil, which is located between the base and the OIS movable part, and is attached to the base and electrically connected to the base; The number of the first coils is three sets, and the positions of the three sets of the first coils correspond to the positions of the two sets of the first magnetic components and the second magnetic components.

[0009] Furthermore, the second magnetic component is a Heilbeck magnetic array.

[0010] Furthermore, the movable AF part includes a lens mount and two second coils. The lens mount is located within the OIS frame and can move up and down relative to the OIS frame along the optical axis. The two second coils are disposed on the lens mount, and their positions correspond to the two sets of first magnetic components.

[0011] Furthermore, the lens driving device also includes a first spring and a second spring. The first spring is disposed on the upper surface of the OIS frame and the lens support, and is electrically connected to the base through several suspension wires. The second spring is disposed on the lower surface of the OIS frame and the lens holder, and the second spring is electrically connected to the second coil.

[0012] Furthermore, the lens mount is provided with an AF drive IC and has an embedded component inside it. The AF drive IC is electrically connected to the first spring and the second spring respectively through the embedded component.

[0013] Furthermore, the lens driving device also includes an outer cover that fits onto the base.

[0014] Furthermore, this utility model also provides a lens module that includes the above-mentioned lens driving device.

[0015] Based on the above, the lens driving device provided by this utility model adopts a three-sided magnetic component design compared with the prior art. At the same time, a first reinforcing component with magnetic conductivity and a second reinforcing component without magnetic conductivity are designed at the corresponding position of the OIS frame. While strengthening the rigidity and strength of the OIS frame, the first reinforcing component with magnetic conductivity can increase the magnetic intensity of the first and second magnetic components, and the second reinforcing component can reduce the magnetic interference on the corresponding side, thereby optimizing the magnetic field utilization rate and anti-magnetic interference capability, and improving the image stabilization performance and reliability of the lens driving device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Unless otherwise specified, the positional relationships shown in the drawings in the following description are based on the direction in which the components are drawn in the figures.

[0017] Figure 1 This is an exploded structural diagram of a lens driving device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a lens driving device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the explosion mechanism of the movable part of the OIS provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the movable part of AF provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of an embedded component provided in an embodiment of the present invention.

[0018] Figure label: Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof mean "at least comprising."

[0021] Please see Figure 1 and Figure 2 , Figure 1 This is an exploded structural diagram of a lens driving device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a lens driving device provided in an embodiment of the present invention.

[0022] To address the technical problem that the moving part of the existing lens driving device may be damaged after being impacted, or to achieve at least one or more of the aforementioned advantages, an embodiment of the present invention provides a lens driving device. As shown in the figure, the lens driving device includes a base 10, an OIS movable part 20, an AF movable part 30, and an outer cover 40.

[0023] The base 10 serves as the supporting foundation for the entire lens drive mechanism, providing a stable motion reference surface for the OIS movable part 20 and the AF movable part 30. The base 10 can be injection molded from high-strength engineering plastic and pre-embedded with signal and power lines to facilitate power supply and signal transmission.

[0024] When the outer cover 40 is closed onto the base 10, it forms a receiving space, within which the OIS movable part 20 and the AF movable part 30 are located. A through-hole is provided on the top of the outer cover 40 to allow light to enter and facilitate imaging. Preferably, the outer cover 40 can be made of a non-magnetic material through stamping, providing good resistance to magnetic interference.

[0025] The OIS movable part 20 is movably mounted on the base 10. When shaking occurs during shooting, the OIS movable part 20 can be driven to translate relative to the base 10 along a plane perpendicular to the optical axis, thereby achieving motion compensation and improving image quality.

[0026] In specific implementation, such as Figure 3 As shown, the movable part 20 of the OIS includes an OIS frame 21, two sets of first magnetic components 22, second magnetic components 23, and reinforcing components 24. The OIS frame 21 can be a rectangular ring structure and is injection molded from high-strength engineering plastic to provide a mounting carrier for internal components.

[0027] The OIS frame 21 has receiving slots formed on the inner walls of three adjacent side walls. Two sets of first magnetic elements 22 are arranged opposite each other and, together with the second magnetic elements 23, are respectively disposed in the receiving slots on the three inner walls, forming a three-sided magnetic element configuration. This configuration is used to drive the OIS frame 21 to translate relative to the base 10 along the X-axis and / or Y-axis, thereby achieving motion compensation and improving image quality. Simultaneously, the three-sided magnetic element design facilitates the arrangement of multiple lenses and avoids magnetic interference between multiple lenses caused by magnetic leakage of the magnetic elements.

[0028] Preferably, the second magnetic element 23 can be designed as a Heilbeck magnetic array, which can effectively improve the magnetic thrust along the Y-axis and avoid insufficient magnetic thrust affecting the imaging quality.

[0029] The reinforcing member 24 is embedded in the OIS frame 21 to improve the strength and rigidity of the OIS frame 21 and reduce the possibility of damage to the OIS frame 21 after impact. Specifically, the reinforcing member 24 includes three first reinforcing members 241 with magnetic conductivity and one second reinforcing member 242 without magnetic conductivity. The three first reinforcing members 241 are respectively embedded in the sidewalls of the OIS frame 21 corresponding to the two sets of first magnetic members 22 and second magnetic members 23, and the extension direction and length of the three first reinforcing members 241 are adapted to their respective first magnetic members 22 or second magnetic members 23. While improving the strength and rigidity of the OIS frame 21, it can also increase the magnetic intensity of the first magnetic members 22 and second magnetic members 23 and optimize the magnetic field utilization rate.

[0030] The second reinforcing member 242 is embedded in the OIS frame 21 and located on the side opposite to the second magnetic member 23. The extension direction and length of the second reinforcing member 242 are adapted to the extension direction and length of the corresponding side wall of the OIS frame 21. While improving the strength and rigidity of the OIS frame 21, it can effectively reduce magnetic interference on the side without magnetic members, improve the anti-magnetic interference capability, and facilitate the arrangement of multiple lenses.

[0031] Based on the above, the lens driving device also includes a first coil 50. The first coil 50 is located between the base 10 and the OIS movable part 20. The first coil 50 can be an enameled coil and can be embedded in a substrate (not shown). The substrate can protect the first coil 50 from impacts and prevent the first coil 50 from being damaged by impacts.

[0032] In specific implementation, the number of first coils 50 can be three sets. The three sets of first coils 50 are respectively attached to the base 10 and are positioned corresponding to the two sets of first magnetic components 22 and second magnetic components 23. At the same time, the three sets of first coils 50 are electrically connected to the base 10.

[0033] When the first coil 50 is energized, it generates an Ampere force under the magnetic field of the first magnetic component 22 and / or the second magnetic component 23 to cut the magnetic field lines, thereby driving the OIS frame 21 to translate relative to the base 10 along the X-axis and / or Y-axis, achieving motion compensation and improving imaging quality.

[0034] Of course, it is understandable that a drive IC for the X-axis (not shown in the conventional diagram) and a drive IC for the Y-axis (not shown in the conventional diagram) can be pre-set on the base 10 to control and sense the movement of the OIS movable part 20.

[0035] The AF movable part 30 is movably housed within the OIS movable part 20. When camera shake occurs during shooting, the AF movable part 30 can be driven to move up and down relative to the OIS movable part along the optical axis, thereby achieving the purpose of focusing, motion compensation, and improving image quality.

[0036] In specific implementation, such as Figure 4 , Figure 5 As shown, the AF movable part 30 includes a lens mount 31 and two second coils 32. The lens mount 31 is located inside the OIS frame 21 and is used to mount the lens (not shown). It can drive the lens to move up and down relative to the OIS frame 21 along the Z-axis to achieve focusing, motion compensation, and improved image quality.

[0037] Two second coils 32 are mounted on the lens mount 31, and their positions correspond to the two sets of first magnetic elements 22. When the two second coils 32 are energized, they generate an Ampere force under the magnetic field of the two sets of first magnetic elements 22, causing them to cut magnetic field lines. This, in turn, drives the lens mount 31 to move up and down relative to the OIS frame 21 along the Z-axis, thereby achieving focusing, motion compensation, and improved image quality.

[0038] In a preferred embodiment, the lens driving device further includes a first spring 60 and a second spring 70. The first spring 60 is disposed on the upper surface of the OIS frame 21 and the lens support 31, and is electrically connected to the base 10 via a plurality of suspension wires 80. The second spring 70 is disposed on the lower surface of the OIS frame 21 and the lens support 31, and is electrically connected to two second coils 32 respectively.

[0039] The first spring 60 and the second spring 70 enable transmission and positioning between the OIS frame 21 and the lens mount 31. When the OIS frame 21 moves relative to the base 10 along the X-axis and / or Y-axis, the first spring 60 and the second spring 70 synchronously drive the lens mount 31 to move relative to the base 10 along the X-axis and / or Y-axis, achieving image stabilization and improving image quality. Simultaneously, in conjunction with the suspension wire 80, the power and signal lines of the second coil 32 can be connected to the base 10.

[0040] Based on the above, an AF drive IC 90 is provided on the lens mount 31. It is used to control and sense the movement of the lens mount 31. In a specific implementation, the lens mount 31 can also be injection molded using high-strength engineering plastic, and several embedded parts 100 are pre-embedded during the injection molding process. The AF drive IC 90 is electrically connected to the first spring 60 and the second spring 70 through the embedded parts 100 respectively.

[0041] Specifically, the power and signal lines of the AF driver IC90 can be divided into 6 pins. The number of embedded parts 100 is adapted to the power and signal lines of the AF driver IC90: 4 pins can be electrically connected to the first spring 60 through 4 embedded parts 100 and conducted to the base 10 through the suspension wire 80; the other 2 pins are electrically connected to the second spring 70 through 2 embedded parts 100 and respectively conducted to the two second coils 32, so as to enable the AF driver IC90 to accurately control the second coils 32.

[0042] In one specific embodiment, the present invention also provides a lens module, which includes the above-mentioned lens driving device.

[0043] In summary, the lens driving device provided by this utility model, compared with the prior art, adopts a three-sided magnetic component design, and designs a first reinforcing component with magnetic conductivity and a second reinforcing component without magnetic conductivity at the corresponding position of the OIS frame. While strengthening the rigidity and strength of the OIS frame, the first reinforcing component with magnetic conductivity can increase the magnetic intensity of the first and second magnetic components, and the second reinforcing component can reduce magnetic interference on the corresponding side, thus optimizing the magnetic field utilization rate and anti-magnetic interference capability, and improving the image stabilization performance and reliability of the lens driving device.

[0044] Although this document frequently uses terms such as magnetic components and reinforcing components, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0045] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this utility model can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lens driving device, characterized in that: include Base; OIS movable part, the OIS movable part is movably mounted on the base; The movable part AF is movably disposed within the movable part OIS; The movable part of the OIS includes an OIS frame, two sets of first magnetic components, a second magnetic component, and a reinforcing component. The OIS frame is capable of translational movement relative to the base along a plane perpendicular to the optical axis. The two sets of first magnetic components are arranged opposite to each other and are respectively disposed on the three inner walls adjacent to the OIS frame with respect to the second magnetic components. The reinforcing member includes three first reinforcing members with magnetic conductivity and one second reinforcing member without magnetic conductivity. The three first reinforcing members are respectively embedded in the sidewalls of the OIS frame corresponding to the two sets of first magnetic members and second magnetic members. The second reinforcing member is embedded in the OIS frame and located on the side opposite to the second magnetic member.

2. The lens driving device according to claim 1, characterized in that: The extension direction and length of the three first reinforcing members are respectively adapted to their corresponding first magnetic member or second magnetic member.

3. The lens driving device according to claim 1, characterized in that: The extension direction and length of the second reinforcing member are adapted to the extension direction and length of the corresponding sidewall of the OIS frame.

4. The lens driving device according to claim 1, characterized in that: The lens driving device further includes a first coil, which is located between the base and the OIS movable part, and is attached to the base and electrically connected to the base. The number of the first coils is three sets, and the positions of the three sets of the first coils correspond to the positions of the two sets of the first magnetic components and the second magnetic components.

5. The lens driving device according to claim 1 or 4, characterized in that: The second magnetic component is a Heilbeck magnetic array.

6. The lens driving device according to claim 1, characterized in that: The movable part of the AF includes a lens mount and two second coils. The lens mount is located inside the OIS frame and can move up and down relative to the OIS frame along the optical axis. The two second coils are disposed on the lens mount and their positions correspond to the two sets of first magnetic components.

7. The lens driving device according to claim 6, characterized in that: The lens driving device further includes a first spring and a second spring. The first spring is disposed on the upper surface of the OIS frame and the lens support, and is electrically connected to the base through several suspension wires. The second spring is disposed on the lower surface of the OIS frame and the lens holder, and the second spring is electrically connected to the second coil.

8. The lens driving device according to claim 7, characterized in that: The lens mount is equipped with an AF drive IC and has an embedded component inside. The AF drive IC is electrically connected to the first spring and the second spring respectively through the embedded component.

9. The lens driving device according to claim 1, characterized in that: The lens driving device also includes an outer cover that fits onto the base.

10. A lens module, characterized in that: It includes the lens driving device as described in any one of claims 1-9.

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