Lens driving device and camera module
By combining horizontal suspension wires and rolling elements, the problem of complex structure and high cost of existing image stabilization motors is solved, which simplifies the lens driving device and improves the image quality, while also meeting the requirements of miniaturization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-06
AI Technical Summary
Existing anti-shake motors are complex in structure, expensive, and cannot be miniaturized. The double-layer ball bearing structure requires a large space and additional lubricant, making assembly inconvenient.
A horizontal suspension wire is used as the AF suspension structure, combined with the first and second rolling elements as OIS guides. The horizontal suspension wire is used as the power and signal lines to achieve a frictionless design. The structure is simplified based on the three-axis closed loop, reducing magnetic leakage.
It achieves a simplified structure for the lens drive device, reduces production costs, avoids magnetic interference, improves imaging quality, and adapts to miniaturization requirements.
Smart Images
Figure CN223977481U_ABST
Abstract
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 a camera module. Background Technology
[0002] Currently, people's demand for camera functions in portable electronic devices (such as tablets, smartphones, etc.) is still increasing rapidly. In order to meet people's diverse requirements for camera imaging, a stabilization motor is usually added to the camera module to compensate for motion during shooting, thereby improving image quality.
[0003] Currently, most conventional image stabilization motors on the market use an upper and lower spring sheet + suspension wire structure or a double-layer ball bearing design to achieve image stabilization. However, the conventional upper and lower spring sheet + suspension wire structure requires many additional components to achieve a three-axis closed-loop design, resulting in a complex overall structure and high manufacturing costs. The double-layer ball bearing design, due to its double-layer ball bearing structure, requires a large space for the overall OIS guiding structure, making miniaturization impossible. Furthermore, the ball bearing structure has friction, requiring additional lubrication, which makes assembly very inconvenient.
[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 shortcomings of existing image stabilization motors, this invention provides a lens driving device comprising a base, an AF movable part, and a lens mount. The AF movable part is movably mounted on the base, and the lens mount is movably mounted on the AF movable part.
[0006] The movable AF part includes an AF frame and several horizontal suspension wires. The AF frame is movably mounted on the base. One end of each of the horizontal suspension wires is connected to the AF frame, and the other end of each horizontal suspension wire is connected to the base. The lens holder is movably mounted on the AF frame.
[0007] Furthermore, a first substrate is provided on one outer side wall of the base, and several horizontal suspension wires are connected to the first substrate. A first coil is provided on the side of the first substrate facing the AF frame, and a first magnet is provided on the AF frame at the position corresponding to the first coil.
[0008] Furthermore, the lens driving device also includes an embedded component and at least two second coils. The embedded component is disposed within the AF frame and is electrically connected to a plurality of the horizontal suspension wires. The two second coils are disposed on the side of the AF frame facing the lens mount and are electrically connected to the embedded component. Two second magnets are provided on the lens mount corresponding to the positions of the two second coils.
[0009] Furthermore, the two second coils are located at two adjacent corners of the AF frame and on a side away from the first substrate.
[0010] Furthermore, the two second coils are arranged at an angle.
[0011] Furthermore, the AF frame is provided with a first rolling groove and at least two second rolling grooves, the first rolling groove is located between two second coils, and the two second rolling grooves are positioned opposite to the two second coils;
[0012] A first rolling element is movably disposed in the first rolling groove, and a second rolling element is movably disposed in the second rolling groove. The first rolling element and the second rolling element are movably connected to the lens support.
[0013] Furthermore, the second rolling element is a roller.
[0014] Furthermore, the lens driving device also includes a shielding cover that fits onto the base.
[0015] Furthermore, the lens drive device also includes a damping cover plate, which is located between the shielding cover and the lens mount, and the damping cover plate is connected to the AF frame;
[0016] The lens mount is provided with a plurality of damping grooves, and the damping cover plate is provided with a plurality of damping parts. The plurality of damping parts extend into the plurality of damping grooves respectively, and the damping parts are movably connected to the damping grooves.
[0017] Furthermore, this utility model also provides a camera module that employs any of the lens driving devices described above.
[0018] Based on the above, the lens driving device and camera module provided by this utility model, compared with the prior art, adopt a horizontal suspension wire as the AF suspension structure to achieve a frictionless design, and use a first rolling element and two second rolling elements as the OIS guiding structure. The horizontal suspension wire is used as the power supply and signal line to achieve electrical connection with the base. Based on the three-axis closed loop, the overall architecture is simplified, the manufacturing process and production cost are optimized, and the magnetic leakage phenomenon is reduced, avoiding magnetic interference to the outside world. Attached Figure Description
[0019] 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.
[0020] Figure 1 This is an exploded structural diagram of a lens driving device according to an embodiment of the present invention;
[0021] Figure 2 An exploded view of the base provided in one embodiment of this utility model;
[0022] Figure 3 A schematic diagram of the base and AF frame provided in an embodiment of this utility model;
[0023] Figure 4 An exploded view of the AF frame and lens mount provided in an embodiment of the present utility model;
[0024] Figure 5 This is a schematic diagram of the connection structure between the horizontal suspension wire and the embedded component provided in an embodiment of the present utility model.
[0025] Figure label:
[0026] Detailed Implementation
[0027] 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.
[0028] 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."
[0029] 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 explosion mechanism of the base provided in an embodiment of the present invention.
[0030] To address the shortcomings of traditional image stabilization motors, or to achieve at least one or more advantages, this invention provides a lens driving device. As shown in the figure, the lens driving device includes a base 10, an AF movable part 20, and a lens support 30.
[0031] A first substrate 11 is provided on one outer side wall of the base 10. The first substrate 11 has built-in power and signal lines to realize the power and signal output of the whole motor.
[0032] like Figure 3 As shown, the movable part AF 20 is movably mounted on the base 10. In a specific implementation, the movable part AF 20 includes an AF frame 21 and several horizontal suspension wires 22. The AF frame 21 is movably mounted on the base 10. One end of each of the several horizontal suspension wires 22 is connected to the AF frame 21, and the other end of each of the several horizontal suspension wires 22 is connected to the base 10.
[0033] Specifically, there are four horizontal suspension wires 22. These four horizontal suspension wires 22 are arranged in pairs, spaced vertically and parallel to each other, on opposite sides of the AF frame 21. One end of each of the four horizontal suspension wires 22 is connected to the AF frame 21, and the other end is perpendicularly connected to the first base plate 11, serving as the suspension structure for the AF frame 21. This allows the AF frame 21 to move smoothly and stably relative to the base 10 along the Z-axis, achieving focusing.
[0034] Furthermore, a first coil 40 is provided on the side of the first substrate 11 facing the AF frame 21. A first magnet 23 is provided on the AF frame 21 at the position corresponding to the first coil 40. When the first coil 40 is subjected to the magnetic field of the first magnet 23, it generates an Ampere force to cut magnetic field lines, thereby pushing the AF frame 21 to perform motion compensation along the Z-axis, achieving the purpose of focusing and image stabilization.
[0035] Preferably, the first substrate 11 is further provided with a first driving IC 12 for monitoring and controlling the Z-axis movement of the AF frame 21.
[0036] Because the movable part AF 20 adopts a suspension structure with four horizontal suspension wires 22 to achieve a frictionless design, when the AF frame 21 moves along the Z-axis, the upper and lower horizontal suspension wires 22 may tilt due to uneven force. Therefore, a magnetic sheet 50 is provided on the side of the first substrate 11 away from the AF frame 21. The magnetic sheet 50 and the first magnet 23 generate a magnetic attraction force to ensure the stability of the AF frame 21, avoid tilting or falling, and improve imaging quality.
[0037] Please combine Figure 1 See Figure 4 and Figure 5 The lens mount 30 is movably mounted on the AF frame 21. In a specific implementation, the lens drive device also includes an embedded component 60 and at least two second coils 70. The embedded component 60 is pre-embedded inside the AF frame 21 and forms an electrical connection with four horizontal suspension wires 22. The two second coils 70 are arranged perpendicularly to each other on the side of the AF frame 21 facing the lens mount 30 and form an electrical connection with the embedded component 60. The power and signal lines are brought out using four horizontal suspension wires 22, eliminating the need for traditional springs and suspension wires. This not only avoids errors caused by deformation of the springs but also simplifies the structural complexity and manufacturing process, facilitating assembly and reducing production costs.
[0038] A second magnet 31 is provided on the lens mount 30 at the position corresponding to the two second coils 70. When the second coils 70 are energized, the magnetic field of the second magnet 31 generates an Ampere force to cut the magnetic field lines, thereby pushing the lens mount 30 to perform motion compensation along the X-axis and / or Y-axis, achieving the purpose of image stabilization and improving image quality.
[0039] Preferably, the two second coils 70 are respectively provided with a second drive IC80 and a third drive IC90, which are used to monitor and control the X-axis movement and Y-axis movement of the lens support 30, respectively.
[0040] In some preferred embodiments, the two second coils 70 are located at two adjacent corners of the AF frame 21, and on the side away from the first substrate 11. That is, the positions of the two second coils 70 and the positions of the first magnet 23 are located on two opposite sides of the AF frame 21, and the two second coils 70 are located at the two corners of the first magnet 23. By concentrating the positions of the two second coils 70 and the two second magnets 31 on the same side of the base 10 as the positions of the first coil 40 and the first magnet 23, the overall magnetic leakage of the image stabilization motor is reduced, and more lenses and image stabilization motors can be arranged.
[0041] Furthermore, the two second coils 70 are arranged at an angle. Preferably, the angle of inclination is 45°.
[0042] Based on the above, the AF frame 21 is provided with a first rolling groove 24 and at least two second rolling grooves 25. The first rolling groove 24 is located between the two second coils 70. A first rolling element 100 is movably disposed in the first rolling groove 24. A third rolling groove 32 is provided on the lens holder 30 at a position corresponding to the first rolling groove 24. The first rolling element 100 is movably connected to the third rolling groove 32.
[0043] The two second rolling grooves 25 are positioned opposite the two second coils 70, respectively controlling the X-axis and Y-axis directions. A second rolling element 110 is movably disposed within each of the two second rolling grooves 25. A fourth rolling groove 33 is provided on the lens support 30 at a position corresponding to the two second rolling grooves 25. The second rolling element 110 is movably connected to the fourth rolling groove 33.
[0044] When the lens mount 30 performs motion compensation relative to the AF frame 21 along the X-axis and / or Y-axis, the first rolling element 100 and the second rolling element 110 respectively form a rolling connection with the lens mount 30, so that the lens mount 30 can perform motion compensation smoothly and evenly along the X-axis and / or Y-axis, thereby improving the image quality.
[0045] Preferably, the second rolling groove 25 is an inverted trapezoidal groove, and the fourth rolling groove 33 is a V-shaped groove.
[0046] Furthermore, the second rolling element 110 is a roller. Compared to balls or other rolling elements, rollers have a larger support surface, which can reduce pressure and prevent pitting that could cause vibration or shaking of the lens mount 30. It is understandable that, due to the use of rollers, in order for the lens mount 30 to perform motion compensation properly, the length L of the second rolling groove 25 and the fourth rolling groove 33 must be slightly greater than the length l of the roller to avoid interference between the second rolling element 110 and the second rolling groove 25 and the fourth rolling groove 33.
[0047] In some preferred embodiments, the lens drive device further includes a shielding cover 120 and a damping cover 130. Specifically, the shielding cover 120 is fitted onto the base 10. The damping cover 130 is disposed between the lens mount 30 and the shielding cover 120. The damping cover 130 is connected to the AF frame 21.
[0048] The lens mount 30 is provided with a plurality of damping grooves 34. The damping cover plate 130 is provided with a plurality of damping parts 131, which extend into the plurality of damping grooves 34 and are movably connected to the damping grooves 34. When the lens mount 30 performs motion compensation along the X-axis and / or Y-axis, it can provide damping force.
[0049] In some preferred embodiments, the present invention also provides a camera module that employs any of the lens driving devices described above.
[0050] In summary, the lens driving device and camera module provided by this utility model, compared with the prior art, adopt a horizontal suspension wire as the AF suspension structure to achieve a frictionless design, and use a first rolling element and two second rolling elements as the OIS guiding structure. The horizontal suspension wire is used as the power supply and signal line to achieve electrical connection with the base. Based on the three-axis closed loop, the overall architecture is simplified, the manufacturing process and production cost are optimized, and magnetic leakage is reduced to avoid magnetic interference to the outside world.
[0051] Although this document uses terms such as horizontal suspension wire frequently, 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.
[0052] 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.
[0053] 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 by comprising: The lens driving device comprises a base, an AF movable part movably arranged on the base, and a lens holder movably arranged on the AF movable part. The AF movable part comprises an AF frame movably arranged on the base and a plurality of horizontal suspension wires, one end of each of the horizontal suspension wires being connected to the AF frame and the other end of each of the horizontal suspension wires being connected to the base, and the lens holder is movably arranged on the AF frame. A first substrate is arranged on one side of the base, the horizontal suspension wires are connected to the first substrate, a first coil is arranged on one side of the first substrate facing the AF frame, and a first magnet is arranged on the AF frame at a position corresponding to the first coil. The lens driving device further comprises a buried part arranged in the AF frame, the buried part being electrically connected to the horizontal suspension wires, and at least two second coils arranged on one side of the AF frame facing the lens holder, the second coils being electrically connected to the buried part, and two second magnets being arranged on the lens holder at positions corresponding to the second coils. The second coils are arranged obliquely.
2. The lens driving device according to claim 1, characterized by: The AF frame is provided with a first rolling groove between the second coils and at least two second rolling grooves, the second rolling grooves being arranged opposite to the second coils.
3. The lens driving device according to claim 2, wherein: The first rolling groove is movably arranged with a first rolling body, the second rolling grooves are movably arranged with second rolling bodies, and the first rolling body and the second rolling bodies are movably connected to the lens holder.
4. The lens driving device according to claim 3, wherein: The second rolling bodies are rollers.
5. The lens driving device according to claim 4, wherein: The lens driving device further comprises a shielding cover covering the base.
6. The lens driving device according to claim 3, wherein: The lens driving device further comprises a damping cover plate between the shielding cover and the lens holder, the damping cover plate being connected to the AF frame. The lens holder is provided with a plurality of damping grooves, the damping cover plate is provided with a plurality of damping parts, the damping parts respectively extend into the damping grooves, and the damping parts are movably connected to the damping grooves.
7. The lens driving device according to claim 6, wherein: The lens driving device is used in the lens driving device according to any one of claims 1-9.
8. The lens driving apparatus according to claim 1, wherein: 9. The lens driving device according to claim 8, wherein: 10. An image capture module, comprising: