An impact-resistant lens driving device and a lens
By employing an OIS movable part connected to a rolling element on the base and a gap control component in the lens drive mechanism, the problem of spring or suspension wire breakage is solved, achieving higher impact resistance and stable optical image stabilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 厦门市众惠微电子有限公司
- Filing Date
- 2025-05-30
- Publication Date
- 2026-07-14
AI Technical Summary
Existing lens drive mechanisms are prone to breakage of reeds or suspension wires when subjected to increased loads, leading to the failure of optical image stabilization and affecting image quality.
The OIS movable part is movably connected to the base through several rolling elements. Combined with the gap control component, the manufacturing process is simplified, the impact force on the spring assembly is reduced, and the suspension wire breakage is avoided.
The impact resistance of the lens drive mechanism has been improved to prevent breakage of the spring or suspension wire, thus ensuring the stability of the optical image stabilization function and the image quality.
Smart Images
Figure CN224501115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical image stabilization technology, and in particular to an impact-resistant lens drive device and lens. Background Technology
[0002] If a mobile phone camera shakes or the subject moves, causing abnormal light shifts, the resulting image will be blurry. This is especially noticeable with high-resolution cameras, in low light, and at high zoom levels. A common way to mitigate this is through optical image stabilization (OIS): which detects and compensates for vibrations to reduce the impact of hand shake.
[0003] Current lens drive mechanisms for optical image stabilization typically employ ball bearing or spring designs. With technological advancements and increasingly demanding image quality requirements, lens weight is also increasing, placing a greater load on the lens stabilization drive mechanism. Faced with this surge in load, existing spring-based lens drive mechanisms are prone to spring or cable breakage, leading to drive failure and an inability to compensate for hand shake, thus impacting image quality.
[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 of potential spring or suspension wire breakage in existing reed-designed lens drive devices, this invention provides an impact-resistant lens drive device. This impact-resistant lens drive device includes a housing, an OIS movable part, and an AF movable part. The housing includes a top cover and a base that fit together. The OIS movable part is movably disposed within the housing and can move relative to the base along a first direction and / or a second direction. The AF movable part is disposed within the housing and located within the OIS movable part. The AF movable part is connected to the OIS movable part via a spring assembly and can move relative to the OIS movable part along a third direction.
[0006] The movable part of the OIS is movably connected to the base through several rolling elements, and the movable part of the OIS is provided with several gap control elements on the side facing the upper cover.
[0007] Furthermore, the number of the rolling elements and the clearance control elements are both four.
[0008] Furthermore, the gap control component is a self-lubricating gasket.
[0009] Furthermore, the movable part of the OIS includes an OIS frame and several magnets. The OIS frame is disposed inside the housing and can move relative to the base in the first direction and / or the second direction. The OIS frame is rotatably connected to the base by several rolling elements, and several magnets are respectively fixed on the inner four-sided sidewalls of the OIS frame.
[0010] The base is provided with a plurality of first coils, the number and position of which correspond to the plurality of magnets.
[0011] Furthermore, the base is provided with a plurality of first ball grooves, the rolling element is movably disposed in the first ball groove, the rolling element protrudes from the first ball groove, the OIS frame is provided with a second ball groove corresponding to the position of the first ball groove, and the rolling element is tactilely connected to the second ball groove.
[0012] Furthermore, the movable part of the AF includes a lens mount and a second coil. The lens mount is disposed inside the housing and located inside the OIS frame. The lens mount is capable of moving relative to the OIS frame along the third direction. The second coil is sleeved on the lens mount.
[0013] Furthermore, the reed assembly includes a first reed, a second reed, and a suspension wire. The first reed is disposed on the side of the lens mount facing the upper cover. The first reed is connected to the OIS frame and the lens mount respectively. The first reed is electrically connected to the second coil.
[0014] The second spring is disposed on the side of the lens mount facing the base. The second spring is connected to the OIS frame and the lens mount respectively. The two ends of the suspension wire are electrically connected to the base and the first spring respectively.
[0015] Furthermore, the gap control element extends to the outer periphery of the OIS frame to form a buffer portion.
[0016] Furthermore, the impact-resistant lens driving device also includes several driving ICs, which are embedded in the base.
[0017] This utility model also provides a lens, which includes the impact-resistant lens driving device described in any one of the above claims.
[0018] Based on the above, the present invention provides an impact-resistant lens driving device and lens. Compared with the prior art, the OIS frame is movably connected to the base through several rolling elements, which can ensure that the OIS frame and the base remain relatively horizontal, simplifying the manufacturing process. The rolling elements, together with several clearance control components, can reduce the longitudinal movement space of the OIS frame, withstand greater impact force, and avoid the technical problem of spring or suspension wire breakage. 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 A schematic diagram of the structure of an impact-resistant lens driving device provided in an embodiment of this utility model;
[0021] Figure 2 This is an exploded structural diagram of an impact-resistant lens driving device provided in an embodiment of the present invention;
[0022] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;
[0023] Figure 4 This is an exploded structural diagram of the movable part of the OIS provided in an embodiment of the present invention;
[0024] Figure 5 An exploded view of the first ball groove and the second ball groove provided in an embodiment of the present utility model;
[0025] Figure 6 This is a schematic diagram of the structure of the first reed provided in an embodiment of the present invention;
[0026] Figure 7 This is a schematic diagram of the structure of the second reed provided in an embodiment of the present invention;
[0027] Figure 8 This is a schematic diagram of the structure of the impact-resistant lens driving device provided in the second embodiment of the present invention.
[0028] Figure label:
[0029] Detailed Implementation
[0030] 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.
[0031] 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."
[0032] Please see Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of an impact-resistant lens driving device provided in an embodiment of this utility model; Figure 2 This is an exploded structural diagram of an impact-resistant lens driving device provided in an embodiment of the present invention.
[0033] To address the technical problem of potential spring or suspension wire breakage in existing reed-designed lens drive devices, or to achieve at least one or more of the aforementioned advantages, an embodiment of this utility model provides an impact-resistant lens drive device. As shown in the figure, the impact-resistant lens drive device includes a housing 10, an OIS movable part 20, and an AF movable part 30.
[0034] The housing 10 includes a top cover 11 and a base 12 that fit together. When the top cover 11 is closed onto the base 12, it forms an accommodating space for assembling the OIS movable part 20 and the AF movable part 30. Power and signal lines can be pre-embedded in the base 12 to facilitate the output of overall power and signals. Specifically, as shown in the figure, the housing 10 can be a component with a square outer edge and upper and lower circular openings on the inner side to facilitate light entering for imaging. Preferably, a driver IC (not shown) can also be pre-embedded in the base 12 to control the OIS movable part 20 and the AF movable part 30 for image stabilization and focusing operations.
[0035] The OIS movable part 20 is movably disposed within the housing 10, and the OIS movable part 20 can move relative to the base in a first direction and / or a second direction to achieve optical image stabilization.
[0036] The AF movable part 30 is disposed within the housing 10 and located within the OIS movable part 20. The AF movable part 30 is connected to the OIS movable part 20 via a spring assembly 40. The AF movable part 30 can move relative to the OIS movable part 20 in a third direction to achieve focusing.
[0037] Based on the above, the OIS movable part 20 is movably connected to the base 12 via several rolling elements 50. Several clearance control elements 60 are provided on the side of the OIS movable part 20 facing the upper cover 11. Specifically, there are four rolling elements 50 and four clearance control elements 60.
[0038] Four rolling elements 50 are respectively disposed at the four corners of the OIS movable part. The OIS movable part 20 is rolled to the base 12 through the four rolling elements 50. The four rolling elements 50 can keep the distance between the OIS movable part 20 and the base 12 consistent, simplifying subsequent processes. At the same time, the four rolling elements 50 can limit the movement of the OIS movable part 20, reducing the movement space of the OIS movable part 20 in three directions.
[0039] Four clearance control elements 60 are provided on the side of the OIS movable part 20 facing the upper cover 11, and are respectively arranged on the four side walls of the OIS movable part 20. Please refer to Figure 2 See Figure 3 The gap control component 60 can fill the gap between the OIS movable part 20 and the upper cover 11. In conjunction with the rolling element 50, it can further reduce the movement space of the OIS movable part 20 in the third direction, reduce the displacement of the OIS movable part 20 in the third direction after being impacted, reduce the impact force on the reed assembly 40, and avoid the problem of the reed assembly 40 breaking, which would affect the imaging quality.
[0040] Preferably, the gap control element 60 can be a self-lubricating gasket made of materials such as nylon, POM, or PTFE.
[0041] Understandably, in the existing manufacturing and assembly processes of lens drive devices using a reed design, additional shims are required to elevate the OIS movable part 20 and maintain a certain distance between it and the base 12 for welding the suspension wire 43, and damping adhesive is applied to the corresponding position. However, after welding is completed, the shims need to be removed, which may cause deformation of the suspension wire 43, and there is also a risk of incomplete application or breakage of the damping adhesive, making the manufacturing process complex.
[0042] In this embodiment, a plurality of rolling elements 50 are provided between the movable part 20 of OIS and the base 12 to form a support. The suspension wire 43 can be welded directly without additional shims, and there is no need to apply damping glue, which simplifies the manufacturing process and reduces production costs.
[0043] In some preferred embodiments, such as Figure 4 As shown, the movable part 20 of the OIS includes an OIS frame 21 and several magnets 22. The OIS frame 21 is disposed inside the housing 10. The OIS frame 21 is rotatably connected to the base 12 by several rolling elements 50, so that the OIS frame 21 can move relative to the base 12 in a first direction and / or a second direction.
[0044] In specific implementation, such as Figure 5 As shown, the base 12 has a first ball groove 121 at each of its four corners. A rolling element 50 is movably disposed within the first ball groove 121 and protrudes from it. The OIS frame 21 has a second ball groove 211 corresponding to the position of the first ball groove 121. The rolling element 50 is tactilely connected to the second ball groove 211, thereby forming a tactile connection between the OIS frame 21 and the base 12, enabling it to move relative to the base 12 along a first direction and / or a second direction.
[0045] Furthermore, the rolling element 50 can keep the distance between the OIS frame 21 and the base 12 consistent, simplifying subsequent processes. At the same time, the rolling element 50 can limit the movement of the OIS frame 21, reducing the space for movement of the OIS frame 21 in three directions.
[0046] Several magnets 22 are fixed to the inner four sides of the OIS frame 21. Several first coils 70 are provided on the base 12 at the positions corresponding to the magnets 22. When the first coils 70 are energized, they generate an Ampere force under the action of the magnetic field of the magnets 22, which cuts the magnetic field lines and thus pushes the OIS frame 21 to move relative to the base 12 in the first direction and / or the second direction, thereby achieving the purpose of image stabilization and improving image quality.
[0047] Preferably, there are four magnets 22 and four first coils 70.
[0048] In some preferred embodiments, the impact-resistant lens drive device further includes a coil flexible plate 80. The coil flexible plate 80 is attached to the base 12. A first coil 70 is disposed within the coil flexible plate 80. The coil flexible plate 80 can protect the first coil 70 and prevent damage or breakage of the first coil 70.
[0049] In some preferred embodiments, the movable part 30 of the AF includes a lens mount 31 and a second coil 32. The lens mount 31 is disposed within the housing 10 and located inside the OIS frame 21. The lens mount 31 is connected to the OIS frame 21 via a reed assembly 40.
[0050] The second coil 32 can be a loop coil. The second coil 32 is fitted onto the lens mount 31. When the second coil 32 is energized, it generates an Ampere force under the magnetic field of the magnet 22, causing it to cut magnetic field lines, thereby pushing the lens mount 31 to move relative to the OIS frame 21 in a third direction, achieving the purpose of focusing and improving image quality.
[0051] Specifically, such as Figure 6 , Figure 7 As shown, the reed assembly 40 includes a first reed 41, a second reed 42, and a suspension wire 43. The first reed 41 is disposed on the side of the lens mount 31 facing the upper cover 11 and is connected to both the OIS frame 21 and the lens mount 31. The second reed 42 is disposed on the side of the lens mount 31 facing the base 12 and is connected to both the OIS frame 21 and the lens mount 31. The second reed 42 is electrically connected to the second coil 32.
[0052] The first reed 41 and the second reed 42 enable transmission and positioning between the OIS frame 21 and the lens mount 31. When the OIS frame 21 moves relative to the base 12 in the first and / or second directions, the first reed 41 and the second reed 42 can synchronously drive the lens mount 31 to move relative to the base 12 in the first and / or second directions, thereby achieving image stabilization and improving image quality.
[0053] The two ends of the suspension wire 43 are electrically connected to the base 12 and the first spring 41, respectively. The suspension wire 43 can provide a limit for the OIS frame 21, and at the same time conduct the power supply and signal line of the second coil 32 to the base 12.
[0054] It should be noted that the first direction described in this embodiment is the X-axis direction, the second direction is the Y-axis direction, and the third direction is the Z-axis direction.
[0055] In another preferred embodiment, such as Figure 8As shown, the gap control member 60 extends to the outer periphery of the OIS frame 21 to form a buffer portion 61. When the OIS frame 21 moves relative to the base 12 in the first direction and / or the second direction, the buffer portion 61 can absorb the impact force between the OIS frame 21 and the top cover 11 in the first direction and / or the second direction, so as to prevent the OIS frame 21 from vibrating after being impacted and affecting the imaging quality.
[0056] In some preferred embodiments, the present invention also provides a lens comprising any of the above-mentioned shock-resistant lens driving devices.
[0057] In summary, the impact-resistant lens driving device and lens provided by this utility model, compared with the prior art, have an OIS frame that is movably connected to the base through several rolling elements, which can ensure that the OIS frame and the base remain relatively horizontal, simplifying the manufacturing process. The rolling elements, together with several clearance control components, can reduce the longitudinal movement space of the OIS frame, withstand greater impact force, and avoid the technical problem of spring or suspension wire breakage.
[0058] Although this document uses terms such as clearance control element 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.
[0059] 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.
[0060] 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. An impact-resistant lens driving device, characterized in that: include A housing, the housing comprising a top cover and a base that fit together; The OIS movable part is movably disposed within the housing and is capable of moving relative to the base along a first direction and / or a second direction; An AF movable part is disposed within the housing and located within the OIS movable part. The AF movable part is connected to the OIS movable part via a spring assembly, and the AF movable part is capable of moving relative to the OIS movable part in a third direction. The movable part of the OIS is movably connected to the base through several rolling elements, and the movable part of the OIS is provided with several gap control elements on the side facing the upper cover.
2. The impact-resistant lens driving device according to claim 1, characterized in that: The number of the rolling elements and the clearance control elements are both four.
3. The impact-resistant lens driving device according to claim 2, characterized in that: The gap control component is a self-lubricating gasket.
4. The impact-resistant lens driving device according to claim 1, characterized in that: The movable part of the OIS includes an OIS frame and several magnets. The OIS frame is disposed inside the housing and can move relative to the base in the first direction and / or the second direction. The OIS frame is rotatably connected to the base by several rolling elements, and several magnets are respectively fixed on the inner four-sided sidewalls of the OIS frame. The base is provided with a plurality of first coils, the number and position of which correspond to the plurality of magnets.
5. The impact-resistant lens driving device according to claim 4, characterized in that: The base is provided with a plurality of first ball grooves, the rolling element is movably disposed in the first ball groove, the rolling element protrudes from the first ball groove, the OIS frame is provided with a second ball groove corresponding to the position of the first ball groove, and the rolling element is tactilely connected to the second ball groove.
6. The impact-resistant lens driving device according to claim 4, characterized in that: The movable part of the AF includes a lens mount and a second coil. The lens mount is disposed inside the housing and located inside the OIS frame. The lens mount is capable of moving relative to the OIS frame along the third direction. The second coil is sleeved on the lens mount.
7. The impact-resistant lens driving device according to claim 6, characterized in that: The reed assembly includes a first reed, a second reed, and a suspension wire. The first reed is disposed on the side of the lens mount facing the upper cover. The first reed is connected to the OIS frame and the lens mount respectively. The first reed is electrically connected to the second coil. The second spring is disposed on the side of the lens mount facing the base. The second spring is connected to the OIS frame and the lens mount respectively. The two ends of the suspension wire are electrically connected to the base and the first spring respectively.
8. The impact-resistant lens driving device according to claim 4, characterized in that: The gap control element extends to the outer periphery of the OIS frame to form a buffer section.
9. The impact-resistant lens driving device according to claim 1, characterized in that: The impact-resistant lens driving device also includes several driving ICs, which are embedded in the base.
10. A lens, characterized in that: It includes the impact-resistant lens drive device as described in any one of claims 1-9.