Driving motor and camera module
By incorporating a magnetic chuck into the drive motor, the obstruction during the movement of the image stabilization bracket is counteracted, increasing the driving force and solving the problem of electromagnetic interference caused by the magnetic chuck, thereby improving the response speed and accuracy of optical image stabilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANCHANG OFILM HUAGUANG TECH CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-19
AI Technical Summary
When existing drive motors perform optical image stabilization displacement, the reverse magnetic attraction of the magnetic chuck interferes with the electromagnetic interaction between the coil and the magnet, affecting the response speed and the accuracy of optical image stabilization.
The magnetic suction assembly includes a first magnetic suction component and a second magnetic suction component, with magnetic suction parts arranged in different directions to counteract the obstruction when the image stabilization bracket moves, increase the driving force, and improve the response speed.
By reducing the obstruction of the magnetic components to the image stabilization bracket, the driving force is increased, thereby improving the optical image stabilization displacement response speed and accuracy of the drive motor.
Smart Images
Figure CN224265046U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of camera technology, specifically to a drive motor and camera module. Background Technology
[0002] In recent years, with the increasing demands for image quality from smart terminal devices, camera modules combining optical image stabilization (OIS) and autofocus (AF) have become standard features in smart terminals. Currently, optical image stabilization primarily relies on the electromagnetic interaction between the coil and the magnet in the vehicle motor (VCM). To achieve the image stabilization reset function, an integral magnetic chuck is typically placed at a corresponding position in the center of the magnet. When the VCM performs the optical image stabilization displacement, the magnetic chuck applies a magnetic attraction force to the magnet in the opposite direction of the displacement, facilitating the magnet's reset movement. However, this structure has an inherent drawback: the reverse magnetic attraction force applied by the magnetic chuck interferes with the electromagnetic interaction between the coil and the magnet, affecting the response speed of the VCM's optical image stabilization displacement, and consequently reducing the accuracy of the camera module's optical image stabilization. Utility Model Content
[0003] In view of the above, it is necessary to provide a drive motor and a camera module to improve the response speed of the drive motor in performing optical image stabilization displacement, thereby improving the optical image stabilization accuracy of the camera module.
[0004] In a first aspect, embodiments of this application provide a drive motor, comprising: a base having a first receiving cavity; a stabilization bracket located in the first receiving cavity and movably connected to the base; a stabilization drive assembly including a first coil, a first magnet, a second coil, and a second magnet, the first magnet and the second magnet being respectively disposed on adjacent sides of the stabilization bracket and connected to the stabilization bracket, the first coil and the second coil being respectively disposed corresponding to the first magnet and the second magnet, the first coil and the first magnet being used to drive the stabilization bracket to move along a first direction, and the second coil and the second magnet being used to drive the stabilization bracket to move along a second direction; and a magnetic suction assembly including a first magnetic suction member and a second magnetic suction member, the first magnetic suction member and the second magnetic suction member being respectively disposed on the base corresponding to the first magnet and the second magnet, the first magnetic suction member having two magnetic suction portions arranged along the first direction, the two magnetic suction portions of the first magnetic suction member being used to provide opposite magnetic suction forces to the stabilization bracket along the first direction, and / or, the second magnetic suction member having two magnetic suction portions arranged along the second direction, the two magnetic suction portions of the second magnetic suction member being used to provide opposite magnetic suction forces to the stabilization bracket along the second direction.
[0005] The aforementioned drive motor, by setting a magnetic suction assembly including a first magnetic suction member and a second magnetic suction member, and setting the first magnetic suction member to have two magnetic suction parts arranged along a first direction, and the second magnetic suction member to have two magnetic suction parts arranged along a second direction, when the image stabilization drive assembly drives the image stabilization bracket to move along the first direction or the second direction, the two magnetic suction parts of the first magnetic suction member or the two magnetic suction parts of the second magnetic suction member provide opposite magnetic suction forces to the image stabilization bracket. The opposite magnetic suction forces generated by the two magnetic suction parts of the first magnetic suction member or the two magnetic suction parts of the second magnetic suction member on the image stabilization bracket cancel each other out internally, thereby reducing the obstruction of the magnetic suction assembly to the movement of the image stabilization bracket, thereby indirectly increasing the driving force of the image stabilization drive assembly in the first direction or the second direction, increasing the speed at which the image stabilization drive assembly drives the image stabilization bracket to move along the first direction or the second direction, thereby increasing the response speed of the drive motor to perform optical image stabilization displacement, and thus improving the optical image stabilization accuracy of the camera module using this drive motor.
[0006] In one embodiment, the first magnet has a first central axis extending along the second direction, and the two magnetic attracting parts of the first magnetic attractor are located on different sides of the first central axis. The second magnet has a second central axis extending along the first direction, and the two magnetic attracting parts of the second magnetic attractor are located on different sides of the second central axis.
[0007] The aforementioned drive motor, by defining a first central axis and defining the two magnetic suction parts of the first magnetic suction member as being located on different sides of the first central axis, enables the two magnetic suction parts located on different sides of the first central axis to generate opposite magnetic attraction forces with the first magnet when the image stabilization bracket moves along the first direction, thereby providing opposite magnetic attraction forces to the image stabilization bracket; by defining a second central axis and defining the two magnetic suction parts of the second magnetic suction member as being located on different sides of the second central axis, enables the two magnetic suction parts located on different sides of the second central axis to generate opposite magnetic attraction forces with the second magnet when the image stabilization bracket moves along the second direction, thereby providing opposite magnetic attraction forces to the image stabilization bracket.
[0008] In one embodiment, there are two first magnetic attractors, which are symmetrically arranged along the second direction and correspond to the two ends of the first magnet. There are also two second magnetic attractors, which are symmetrically arranged along the first direction and correspond to the two ends of the second magnet. Alternatively, the two magnetic attracting portions of the first magnetic attractor extend along the second direction to their ends, corresponding to the two ends of the first magnet. The two magnetic attracting portions of the second magnetic attractor extend along the first direction to their ends, corresponding to the two ends of the second magnet.
[0009] The aforementioned drive motor, by limiting the number of the first magnetic attractor and the number of the second magnetic attractor to two and symmetrically arranged, avoids excessive magnetic attraction between the first magnetic attractor and the first magnet, and also avoids excessive magnetic attraction between the second magnetic attractor and the second magnet. This helps control the driving force of the anti-shake drive assembly, thereby ensuring the anti-shake accuracy of the drive motor; or, by limiting the magnetic attracting portion of the first magnetic attractor and the second magnetic attractor to extend to their two ends corresponding to the two ends of the first magnet or the second magnet respectively, the magnetic attraction between the first magnetic attractor and the first magnet, and the magnetic attraction between the second magnetic attractor and the second magnet, are stabilized.
[0010] In one embodiment, the first magnetic attractor further has a connecting portion connecting its two magnetic attractor portions, and the second magnetic attractor further has a connecting portion connecting its two magnetic attractor portions. Both the first magnetic attractor and the second magnetic attractor are U-shaped, and the width of the connecting portion is smaller than the width of the magnetic attractor portion.
[0011] The aforementioned drive motor, by providing the aforementioned connecting part, connects the connecting part to the two magnetic parts, making both the first magnetic part and the second magnetic part an integral structure. The integral structure of the first magnetic part and the second magnetic part is easy to install, reducing the assembly difficulty of the drive motor. In addition, by limiting the width of the connecting part to be smaller than the width of the magnetic part, magnetic attraction between the connecting part and the corresponding first magnet and second magnet is avoided.
[0012] In one embodiment, the image stabilization bracket has a second receiving cavity, and the drive motor further includes: a focusing bracket located in the second receiving cavity and movably connected to the image stabilization bracket; and a focusing drive assembly including a first focusing drive element and a second focusing drive element, wherein the first focusing drive element is disposed on the focusing bracket, and the second focusing drive element is disposed on the image stabilization bracket corresponding to the first focusing drive element, wherein one of the first focusing drive element and the second focusing drive element is a focusing coil, and the other is a focusing magnet.
[0013] The aforementioned drive motor, by setting the aforementioned focusing bracket and focusing drive assembly, also has a focusing function.
[0014] In one embodiment, the drive motor further includes at least two guide members, which are spaced apart from the image stabilization bracket and located in the second receiving cavity, and the focusing bracket moves along the at least two guide members.
[0015] The aforementioned drive motor, by setting the aforementioned guide component, enables the focus bracket to move relative to the image stabilization bracket, reducing the friction force experienced by the focus bracket during movement and ensuring smooth movement of the focus bracket.
[0016] In one embodiment, the drive motor further includes an image stabilization circuit board and an elastic element. The image stabilization circuit board is located between the base and the image stabilization bracket and connected to the base. The first coil and the second coil are disposed on the side of the image stabilization circuit board away from the base and electrically connected to the image stabilization circuit board. The elastic element is disposed between the base and the image stabilization bracket to provide damping for the movement of the image stabilization bracket and elastic force during reset. The elastic element is conductive. The image stabilization bracket is embedded with conductive lines. One end of the conductive lines is electrically connected to the image stabilization circuit board, and the other end of the conductive lines is electrically connected to the focusing coil to supply power to the focusing coil.
[0017] The aforementioned drive motor, by setting up an image stabilization circuit board and embedding conductive lines on the image stabilization bracket, enables the first coil, the second coil, and the focusing coil to be electrically connected to the image stabilization circuit board, which is beneficial for the rational layout of the drive motor's circuitry; by setting up an elastic element and limiting the elastic element to have conductivity, the elastic element can simultaneously provide damping, elastic force during reset, and conductivity, which is also beneficial for the rational layout of the drive motor's circuitry.
[0018] In one embodiment, the drive motor further includes a rolling element that rolls against the anti-shake bracket and the base. The rolling element includes at least three rolling elements. The base has at least three first rolling grooves, and the anti-shake bracket has at least three second rolling grooves. The at least three first rolling grooves and the at least three second rolling grooves are arranged opposite to each other to accommodate the corresponding rolling elements. At least two of the first rolling grooves extend along the first direction or the second direction, and at least two of the second rolling grooves extend along the second direction or the first direction.
[0019] The aforementioned drive motor, by incorporating at least three rolling elements, enables the anti-shake bracket to roll relative to the base, thereby allowing the anti-shake bracket to move along the first and second directions. Furthermore, the rolling elements reduce friction during movement, ensuring smooth motion. The first and second rolling grooves ensure the rolling elements are stably positioned between the anti-shake bracket and the base, preventing them from slipping off and ensuring stable operation of the drive motor. Moreover, by ensuring the first and second rolling grooves are perpendicular, the accuracy of the anti-shake bracket's movement along the first and second directions is ensured, preventing interference between anti-shake components during movement in these directions.
[0020] In one embodiment, the drive motor further includes a stabilization sensor, which is disposed on the side of the stabilization circuit board near the base and electrically connected to the stabilization circuit board, corresponding to the first coil and the second coil respectively.
[0021] The aforementioned drive motor, by incorporating the aforementioned anti-shake sensor, detects the movement of the anti-shake bracket in the first and second directions, thereby improving the anti-shake accuracy of the drive motor.
[0022] Secondly, embodiments of this application also provide a camera module, including a drive motor as described in any of the above technical solutions.
[0023] The aforementioned camera module's drive motor incorporates a magnetic traction assembly comprising a first magnetic traction component and a second magnetic traction component. The first magnetic traction component has two magnetic traction portions arranged along a first direction, and the second magnetic traction component has two magnetic traction portions arranged along a second direction. When the image stabilization drive assembly drives the image stabilization bracket to move along the first or second direction, the two magnetic traction portions of the first or second magnetic traction component provide opposing magnetic attraction forces to the image stabilization bracket. These opposing magnetic attraction forces internally cancel each other out, thereby reducing the obstruction of the image stabilization bracket's movement by the magnetic traction assembly. This indirectly increases the driving force of the image stabilization drive assembly in the first or second direction, increasing the speed at which the image stabilization drive assembly drives the image stabilization bracket to move along the first or second direction. This, in turn, improves the response speed of the drive motor in executing optical image stabilization displacement, and ultimately enhances the optical image stabilization accuracy of the camera module using this drive motor. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the drive motor provided in an embodiment of this application.
[0025] Figure 2 yes Figure 1 An exploded view of the first embodiment of the drive motor shown.
[0026] Figure 3 yes Figure 1 An exploded view of the second embodiment of the drive motor shown.
[0027] Figure 4 yes Figure 1 An exploded view of the third embodiment of the drive motor shown.
[0028] Key component symbols: Drive motor 100, base 10, light outlet 101, first rolling groove 102, clearance groove 103, positioning groove 104, first receiving cavity 105, body 11, protrusion 12, positioning pin 13, connecting pin 14, anti-shake bracket 20, second receiving cavity 201, assembly groove 202, second rolling groove 203, mounting groove 204, mounting pin 21, anti-shake circuit board 30, positioning hole 301, anti-shake drive assembly 40, first magnet 41, second magnet 42, First coil 43, Second coil 44, Magnetic suction assembly 50, First magnetic suction member 501, Second magnetic suction member 503, Magnetic suction part 51, Connecting part 52, Focusing bracket 60, Light passage hole 601, Sliding groove 602, Embedding groove 603, Focusing drive assembly 70, First focusing drive member 71, Second focusing drive member 72, Elastic member 80, Connecting hole 801, Cover 90, Light entrance hole 901, Rolling member 91, Guide member 92, Image stabilization sensor 93, Focusing sensor 94. Detailed Implementation
[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0030] In the description of this application, it should be understood that the terms indicating 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 application and simplifying the description, and 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 of this application. 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, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.
[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0032] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.
[0033] Please see Figure 1 This application provides a drive motor 100. The drive motor 100 is applied in a camera module (not shown). The drive motor 100 is used to drive the lens (not shown) in the camera module to move to achieve optical image stabilization. The drive motor 100 can also drive the lens in the camera module to move to achieve autofocus. For ease of understanding and explanation, the embodiments of this application define the following... Figure 1 The XYZ coordinate system shown can be a first direction, a second direction, and a third direction. It should be understood that this is not a limitation on the embodiments of this application.
[0034] Please refer to the above. Figure 2 , Figure 3 and Figure 4 The drive motor 100 includes a base 10, a stabilization bracket 20, a stabilization drive assembly 40, and a magnetic suction assembly 50. The base 10 has a first receiving cavity 105, which is used to install the stabilization bracket 20, the stabilization drive assembly 40, the magnetic suction assembly 50, and other items, so that the drive motor 100 can be modularly configured.
[0035] The image stabilization bracket 20 is located in the first receiving cavity 105 and is movably connected to the base 10. In this embodiment, the image stabilization bracket 20 is movably connected to the base 10 along a first direction and a second direction perpendicular to the first direction. The image stabilization bracket 20 has a second receiving cavity 201. The image stabilization bracket 20 has a travel distance when it moves along the first direction and the second direction, which can be understood as the farthest distance that the image stabilization bracket 20 can move along the first direction and the second direction.
[0036] The image stabilization drive assembly 40 is configured to drive the image stabilization bracket 20 to move along a first direction and a second direction. The image stabilization drive assembly 40 includes a first coil 43, a first magnet 41, a second coil 44, and a second magnet 42. The first magnet 41 and the second magnet 42 are respectively disposed on adjacent sides of the image stabilization bracket 20 and connected to the image stabilization bracket 20. The first coil 43 and the second coil 44 are respectively disposed corresponding to the first magnet 41 and the second magnet 42. The first coil 43 and the first magnet 41 are used to drive the image stabilization bracket 20 to move along the first direction, and the second coil 44 and the second magnet 42 are used to drive the image stabilization bracket 20 to move along the second direction.
[0037] The magnetic attraction assembly 50 includes a first magnetic attraction member 501 and a second magnetic attraction member 503. The first magnetic attraction member 501 and the second magnetic attraction member 503 are respectively disposed on the base 10 corresponding to the first magnet 41 and the second magnet 42. The first magnetic attraction member 501 has two magnetic attraction portions 51 arranged along a first direction. Along the first direction, the two magnetic attraction portions 51 of the first magnetic attraction member 501 are used to provide opposite magnetic attraction forces to the image stabilization bracket 20. That is, when the image stabilization bracket 20 moves along the first direction, there are opposite magnetic attraction forces between the two magnetic attraction portions 51 of the first magnetic attraction member 501 and the first magnet 41. And / or, the second magnetic attraction member 503 has two magnetic attraction portions 51 arranged along a second direction. Along the second direction, the two magnetic attraction portions 51 of the second magnetic attraction member 503 are used to provide opposite magnetic attraction forces to the image stabilization bracket 20. That is, when the image stabilization bracket 20 moves along the second direction, there are opposite magnetic attraction forces between the two magnetic attraction portions 51 of the second magnetic attraction member 503 and the second magnet 42. Understandably, the two magnetic suction parts 51 of the first magnetic suction member 501 are located at the two sides of the moving stroke of the corresponding first magnet 41 along the first direction, and the two magnetic suction parts 51 of the second magnetic suction member 503 are located at the two sides of the moving stroke of the corresponding second magnet 42 along the second direction.
[0038] In this embodiment, the drive motor 100 includes a magnetic suction assembly 50 comprising a first magnetic suction member 501 and a second magnetic suction member 503. The first magnetic suction member 501 has two magnetic suction portions 51 arranged along a first direction, and the second magnetic suction member 503 has two magnetic suction portions 51 arranged along a second direction. When the image stabilization drive assembly 40 drives the image stabilization bracket 20 to move along the first or second direction, the two magnetic suction portions 51 of the first magnetic suction member 501 or the two magnetic suction portions 51 of the second magnetic suction member 503 provide opposite magnetic suction forces to the image stabilization bracket 20. The opposing magnetic attraction forces generated by the two magnetic attraction parts 51 of the first magnetic attraction part 51 or the second magnetic attraction part 503 on the image stabilization bracket 20 cancel each other out internally, thereby reducing the obstruction of the image stabilization bracket 20 by the magnetic attraction assembly 50 when it moves. This indirectly increases the driving force of the image stabilization drive assembly 40 in the first or second direction, and increases the speed at which the image stabilization drive assembly 40 drives the image stabilization bracket 20 to move in the first or second direction. This improves the response speed of the drive motor 100 in performing optical image stabilization displacement, and further improves the optical image stabilization accuracy of the camera module using the drive motor 100.
[0039] In this embodiment, the drive motor 100 also includes a vibration stabilization circuit board 30 and an elastic element 80.
[0040] The image stabilization circuit board 30 is disposed between the base 10 and the image stabilization bracket 20 and connected to the base 10. The image stabilization circuit board 30 is used for electrical connection with an external structure (not shown) and provides power and signal transmission functions to the drive motor 100. For example, the image stabilization circuit board 30 is electrically connected to an external power supply (not shown) and an external controller (not shown). The image stabilization drive assembly 40 is connected between the image stabilization bracket 20 and the image stabilization circuit board 30, and the image stabilization drive assembly 40 is electrically connected to the image stabilization circuit board 30. Specifically, the first coil 43 and the second coil 44 are disposed on the side of the image stabilization circuit board 30 away from the base 10 and are electrically connected to the image stabilization circuit board 30, and the magnetic suction assembly 50 is disposed on the side of the image stabilization circuit board 30 away from the image stabilization drive assembly 40.
[0041] An elastic element 80 is disposed between the base 10 and the anti-shake bracket 20 to provide damping for the movement of the anti-shake bracket 20 and elastic force during reset. In this embodiment, the elastic element 80 is conductive and can also function as a transmission circuit, thus combining the functions of providing damping, elastic force during reset, and conductivity. This facilitates a rational layout of the wiring of the drive motor 100, thereby reducing the wiring harness configuration in the drive motor 100 and ultimately enabling the miniaturization of the drive motor 100.
[0042] In this embodiment, the first magnet 41 has a first central axis (not shown) extending along a second direction, and the two magnetic attracting parts 51 of the first magnetic attracting member 501 are located on different sides of the first central axis. The second magnet 42 has a second central axis (not shown) extending along a first direction, and the two magnetic attracting parts 51 of the second magnetic attracting member 503 are located on different sides of the second central axis. Wherein, if the first magnet 41 and the second magnet 42 are regular magnets, then the first central axis and the second central axis are the central axes of the magnetic fields of the first magnet 41 and the second magnet 42; if the first magnet 41 and the second magnet 42 are irregular magnets, then the first central axis and the second central axis are referenced to the central axis of the magnetic fields of the first magnet 41 and the second magnet 42. Thus, by defining the first central axis and defining the two magnetic suction parts 51 of the first magnetic suction member 501 as being located on different sides of the first central axis, when the image stabilization bracket 20 moves along the first direction, the two magnetic suction parts 51 located on different sides of the first central axis can generate opposite magnetic attraction forces with the first magnet 41; by defining the second central axis and defining the two magnetic suction parts 51 of the second magnetic suction member 503 as being located on different sides of the second central axis, when the image stabilization bracket 20 moves along the second direction, the two magnetic suction parts 51 located on different sides of the second central axis can generate opposite magnetic attraction forces with the second magnet 42.
[0043] In this embodiment, the drive motor 100 further includes a focusing bracket 60 and a focusing drive assembly 70. The focusing bracket 60 is located within the second receiving cavity 201 and is movably connected to the image stabilization bracket 20. Specifically, the focusing bracket 60 is movably disposed in the second receiving cavity 201 along a third direction perpendicular to the first and second directions, and the focusing bracket 60 can move together with the image stabilization bracket 20 along the first and second directions. It can be understood that the third direction can be understood as the optical axis direction. The focusing drive assembly 70 is connected between the focusing bracket 60 and the image stabilization bracket 20, and the focusing drive assembly 70 is configured to drive the focusing bracket 60 to move along the third direction.
[0044] The focus drive assembly 70 includes a first focus drive 71 and a second focus drive 72. The first focus drive 71 is disposed on the focus bracket 60, and the second focus drive 72 is disposed on the image stabilization bracket 20 corresponding to the first focus drive 71. One of the first focus drive 71 and the second focus drive 72 is a focus coil, and the other is a focus magnet. In this embodiment, the first focus drive 71 is a focus magnet, and the second focus drive 72 is a focus coil. The second focus drive 72 is electrically connected to the image stabilization circuit board 30.
[0045] In this embodiment, the inner side of the image stabilization bracket 20 is provided with a mounting groove 204, which is connected to the second receiving cavity 201. The side of the focusing bracket 60 facing the mounting groove 204 is provided with an embedding groove 603, wherein the first focusing drive 71 is disposed in the embedding groove 603 and the second focusing drive 72 is disposed in the mounting groove 204.
[0046] Thus, by configuring the aforementioned focusing bracket 60 and focusing drive assembly 70, the drive motor 100 also functions as an autofocus unit. By configuring the aforementioned first focusing drive component 71 and second focusing drive component 72, the first focusing drive component 71 and the second focusing drive component 72 cooperate to drive the focusing bracket 60 to move. By configuring the aforementioned mounting slot 204 and embedding slot 603, the space occupied by the focusing drive assembly 70 is reduced, and the radial dimension of the drive motor 100 is reduced, which facilitates the miniaturization of the drive motor 100.
[0047] In this embodiment, the image stabilization bracket 20 is embedded with conductive lines (not shown in the figure). One end of the conductive lines is electrically connected to the image stabilization circuit board 30, and the other end is electrically connected to the focusing coil to supply power to the focusing coil. In this way, by embedding conductive lines on the image stabilization bracket 20, the focusing coil and the image stabilization circuit board 30 are electrically connected, which is beneficial for the rational layout of the drive motor 100's wiring.
[0048] In this embodiment, the drive motor 100 also includes a cover 90. The cover 90 is connected to the base 10 to form a generally closed structure. The cover 90 has a light-entry hole 901, the focusing bracket 60 has a light-transmitting hole 601, the lens of the camera module is disposed within the light-transmitting hole 601, and the base 10 has a light-exit hole 101. The light-entry hole 901, the light-transmitting hole 601, and the light-exit hole 101 are interconnected. Thus, by providing the cover 90, which is connected to the base 10, the drive motor 10 protects the image stabilization bracket 20, the image stabilization circuit board 30, the image stabilization drive assembly 40, the magnetic assembly 50, the focusing bracket 60, the focusing drive assembly 70, the elastic element 80, and other components, thereby improving the service life of the drive motor 100.
[0049] In this embodiment, the base 10 includes a body 11 and four protrusions 12, which are spaced apart at the four corners of the body 11. A cover 90 is fitted onto the four protrusions 12 and connected to the body 11. The area enclosed by the four protrusions 12 and the body 11 roughly constitutes a first receiving cavity 105. A stabilization bracket 20 is positioned within the area enclosed by the four protrusions 12 along a first direction and a second direction. A stabilization circuit board 30 is mounted on the body 11. Specifically, the body 11 is provided with a positioning pin 13, and the stabilization circuit board 30 has a positioning hole 301. The stabilization circuit board 30 is placed on the stabilization circuit board 30 by the positioning pin 13 engaging with the positioning hole 301, thereby improving the arrangement accuracy of the stabilization circuit board 30.
[0050] In this embodiment, each protrusion 12 of the base 10 is provided with a connecting pin 14. The anti-shake bracket 20 has four mounting pins 21 on the side opposite to the main body 11. There are four elastic elements 80, distributed in pairs on both sides of the anti-shake bracket 20 along the second direction. Each elastic element 80 extends along the first direction, and each elastic element 80 has connecting holes 801 at both ends. The two ends of the elastic element 80 are respectively fitted onto the corresponding connecting pin 14 and the corresponding mounting pin 21 through the connecting holes 801, so that the elastic element 80 is connected to the base 10 and the anti-shake bracket 20.
[0051] In this embodiment, since the two magnetic suction parts 51 of the first magnetic suction member 501 and the two magnetic suction parts 51 of the second magnetic suction member 503 can indirectly increase the driving force of the anti-shake drive assembly 40, the elastic member 80 can be made of a material with higher hardness to increase the elastic force of the elastic member 80, reduce the rotation generated when the anti-shake bracket 20 moves, and also facilitate the reset of the anti-shake bracket 20.
[0052] In this embodiment, the image stabilization bracket 20 has two mounting slots 202 on the side facing the image stabilization circuit board 30. The two mounting slots 202 are located on adjacent sides of the image stabilization bracket 20. One mounting slot 202 is used to accommodate the first magnet 41 and the first coil 43, and the other mounting slot 202 is used to accommodate the second magnet 42 and the second coil 44. In this way, by opening the mounting slots 202 on the side of the image stabilization bracket 20 facing the image stabilization circuit board 30, the first magnet 41, the second magnet 42, the first coil 43 and the second coil 44 are embedded in the image stabilization bracket 20, reducing the space occupied by the first magnet 41, the second magnet 42, the first coil 43 and the second coil 44, which helps to reduce the thickness of the drive motor 100 along the third direction, and enables the drive motor 100 to be miniaturized.
[0053] To reduce the friction experienced by the image stabilization bracket 20 during movement, in this embodiment, the drive motor 100 further includes rolling elements 91 that roll against the image stabilization bracket 20 and the base 10. At least three rolling elements 91 are included, and these three rolling elements roll against the image stabilization bracket 20 and the base 10. In this embodiment, the drive motor 100 includes three rolling elements 91, which are approximately distributed at the three corners of the body 11 and adjacent to the corresponding protrusions 12. The three rolling elements 91 are staggered with the two mounting grooves 202. Thus, by providing the aforementioned three rolling elements 91, the image stabilization bracket 20 can roll relative to the base 10, thereby allowing the image stabilization bracket 20 to move along the first and second directions. Furthermore, the rolling elements 91 also reduce the friction experienced by the image stabilization bracket 20 during movement, ensuring smooth movement of the image stabilization bracket 20.
[0054] Understandably, in other embodiments, the number of rolling elements 91 may be four or more, and this application does not specifically limit this.
[0055] In this embodiment, the base 10 has three first rolling grooves 102 on its main body 11, and the anti-shake bracket 20 has three second rolling grooves 203 on the side facing the main body 11. The three first rolling grooves 102 and the three second rolling grooves 203 are arranged opposite each other to accommodate the corresponding rolling elements 91. Among them, two diagonally opposite first rolling grooves 102 extend along the second direction and their cross-sections parallel to the third direction are approximately V-shaped, two diagonally opposite second rolling grooves 203 extend along the first direction and their cross-sections parallel to the third direction are approximately V-shaped, and the other first rolling groove 102 is approximately a square groove, and the other second rolling groove 203 is approximately a square groove. Thus, by setting the first rolling groove 102 and the second rolling groove 203 as described above, the rolling element 91 can be stably placed between the anti-shake bracket 20 and the base 10, preventing the rolling element 91 from detaching from the anti-shake bracket 20 and the base 10, and ensuring the stable operation of the drive motor 100. Furthermore, by defining two of the first rolling grooves 102 and two of the second rolling grooves 203 as perpendicular, the accuracy of the movement of the anti-shake bracket 20 along the first and second directions is ensured, avoiding interference with the drive structure when the anti-shake bracket 20 moves along the first and second directions. By defining one of the first rolling grooves 102 and one of the second rolling grooves 203 as square grooves, the rolling element 91 can achieve omnidirectional rolling within the rolling groove.
[0056] Understandably, in other embodiments, the number of the first rolling groove 102 and the second rolling groove 203 is equal to the number of rolling elements 91. When the number of the first rolling groove 102 and the second rolling groove 203 is four or more, at least one square groove still needs to be provided to avoid interference with the drive structure when the anti-shake bracket 20 moves along the first direction and the second direction.
[0057] To reduce the friction experienced by the focusing bracket 60 during movement, in this embodiment, the drive motor 100 further includes at least two guide members 92. These guide members 92 are spaced apart from the image stabilization bracket 20 and located within the second receiving cavity 201. The guide members 92 extend in a third direction, and the focusing bracket 60 moves along the at least two guide members 92. In this embodiment, there are two guide members 92 arranged diagonally. Sliding grooves 602, adapted to the guide members 92, are respectively provided at the diagonal points of the focusing bracket 60. The guide members 92 can be sliding columns or ball bearings. Thus, by providing the aforementioned guide members 92, the focusing bracket 60 can move relative to the image stabilization bracket 20, reducing the friction experienced by the focusing bracket 60 during movement and ensuring smooth movement of the focusing bracket 60. It is understood that in other embodiments, the number of guide members 92 can be three or more, depending on the actual situation. This application embodiment does not specifically limit this.
[0058] In this embodiment, the first magnetic member 501 also has a connecting portion 52 connecting its two magnetic parts 51, and the second magnetic member 503 also has a connecting portion 52 connecting its two magnetic parts 51. Both the first magnetic member 501 and the second magnetic member 503 are U-shaped, and the width of the connecting portion 52 is smaller than the width of the magnetic parts 51. Thus, by providing the connecting portion 52, the connecting portion 52 is connected to the two magnetic parts 51, making both the first magnetic member 501 and the second magnetic member 503 an integral structure. The integral structure of the first magnetic member 501 and the second magnetic member 503 is easy to install, reducing the assembly difficulty of the drive motor 100. In addition, by limiting the width of the connecting portion 52 to be smaller than the width of the magnetic parts 51, the magnetic force of the connecting portion 52 on the anti-shake drive assembly 40 is weakened.
[0059] In this embodiment, there are two first magnetic attractors 501, which are symmetrically arranged along the second direction and correspond to the two ends of the first magnet 41, respectively. There are also two second magnetic attractors 503, which are symmetrically arranged along the first direction and correspond to the two ends of the second magnet 42, respectively. By limiting the number of first magnetic attractors 501 and second magnetic attractors 503 to two and symmetrically arranged, excessive magnetic attraction between the first magnetic attractor 501 and the first magnet 41, and excessive magnetic attraction between the second magnetic attractor 503 and the second magnet 42, is avoided. This helps control the driving force of the anti-shake drive assembly 40, thereby ensuring the anti-shake accuracy of the drive motor 100.
[0060] Understandably, in other embodiments, the number of the first magnetic attractor 501 and the second magnetic attractor 503 can also be one each. The two magnetic attracting portions 51 of the first magnetic attractor 501 extend along a second direction to their respective ends, corresponding to the ends of the first magnet 41. Similarly, the two magnetic attracting portions 51 of the second magnetic attractor 503 extend along a first direction to their respective ends, corresponding to the ends of the second magnet 42. Thus, by limiting the extension of the magnetic attracting portions 51 of the first magnetic attractor 501 and the second magnetic attractor 503 to their respective ends corresponding to the ends of the first magnet 41 or the second magnet 42, the magnetic attraction between the first magnetic attractor 501 and the first magnet 41, as well as the magnetic attraction between the second magnetic attractor 503 and the second magnet 42, is stabilized. Understandably, when the magnetic attracting portions 51 of the first magnetic attractor 501 and the second magnetic attractor 503 are extended, the magnetic density of the magnetic attracting portions 51 can be correspondingly reduced to avoid excessive magnetic attraction between the magnetic attracting portions 51 and the first magnet 41 or the second magnet 42.
[0061] In this embodiment, a clearance groove 103 is also provided on the side of the main body 11 facing the anti-shake circuit board 30. The number of clearance grooves 103 is equal to the number of the first magnetic member 501 and the second magnetic member 503 of the magnetic attraction assembly 50. The clearance groove 103 is used to accommodate the first magnetic member 501 and the second magnetic member 503 of the corresponding magnetic attraction assembly 50. In this way, by providing clearance grooves 103 on the main body 11, the space occupied by the magnetic attraction assembly 50 is reduced, which helps to reduce the thickness of the drive motor 100 along a third direction, thereby enabling the miniaturization of the drive motor 100.
[0062] Understandably, in other embodiments, the first magnetic member 501 and the second magnetic member 503 may also be directly glued to the body 11 of the base 10, and this application embodiment does not specifically limit this.
[0063] In this embodiment, the drive motor 100 further includes an image stabilization sensor 93 and a focus sensor 94. There are two image stabilization sensors 93, corresponding to the first coil 43 and the second coil 44, respectively disposed on the side of the image stabilization circuit board 30 away from the image stabilization drive assembly 40 and electrically connected to the image stabilization circuit board 30. The two image stabilization sensors 93 are used to sense the corresponding first coil 43 and second coil 44 to detect the movement distance of the image stabilization bracket 20. The image stabilization sensors 93 can be Hall sensors. The focus sensor 94 is disposed on the image stabilization bracket 20 and corresponds to the focus bracket 60. The focus sensor 94 is used to sense the focus bracket 60 to detect the movement distance of the focus bracket 60. The focus sensor 94 can also be a Hall sensor. Thus, by setting the aforementioned image stabilization sensors 93 and focus sensors 94, the movement distance of the image stabilization bracket 20 in the first and second directions, and the movement distance of the focus bracket 60 in the third direction, are detected, improving the image stabilization and focusing accuracy of the drive motor 100.
[0064] In this embodiment, two clearance slots 104 are provided on the side of the main body 11 facing the image stabilization circuit board 30, and each clearance slot 104 corresponds to one of the two image stabilization sensors 93. The clearance slots 104 are used to accommodate the corresponding image stabilization sensors 93. In this way, by providing the clearance slots 104, the space occupied by the image stabilization sensors 93 is reduced, which helps to reduce the thickness of the drive motor 100 along the third direction, thereby enabling the drive motor 100 to be miniaturized.
[0065] This application embodiment also provides a camera module (not shown). The camera module includes a drive motor 100, a lens (not shown), and a photosensitive element (not shown) as described above. The lens is disposed within the light-transmitting hole 601 of the focusing bracket 60, and the photosensitive chip is disposed on the base 10 and located on the light-emitting side of the lens. Specifically, the photosensitive chip is disposed on the side of the base 10 facing away from the lens. It can be understood that in other embodiments, the photosensitive chip may also be disposed on the side of the base 10 facing the lens.
[0066] Thus, in this embodiment, the camera module's drive motor 100 includes a magnetic suction assembly 50 comprising a first magnetic suction member 501 and a second magnetic suction member 503. The first magnetic suction member 501 has two magnetic suction portions 51 arranged along a first direction, and the second magnetic suction member 503 has two magnetic suction portions 51 arranged along a second direction. When the image stabilization drive assembly 40 drives the image stabilization bracket 20 to move along the first or second direction, the two magnetic suction portions 51 of the first magnetic suction member 501 or the two magnetic suction portions 51 of the second magnetic suction member 503 provide opposite magnetic attraction forces to the image stabilization bracket 20. The opposing magnetic forces generated by the two magnetic parts 51 of the first magnetic member 501 or the two magnetic parts 51 of the second magnetic member 503 on the image stabilization bracket 20 cancel each other out internally. This reduces the obstruction of the magnetic assembly 50 on the movement of the image stabilization bracket 20, thereby indirectly increasing the driving force of the image stabilization drive assembly 40 in the first or second direction. This increases the speed at which the image stabilization drive assembly 40 drives the image stabilization bracket 20 to move along the first or second direction, thereby improving the response speed of the drive motor 100 in performing optical image stabilization displacement, and ultimately improving the optical image stabilization accuracy of the camera module. Furthermore, by providing an elastic member 80 between the base 10 and the image stabilization bracket 20, the elastic member 80 provides damping and the elastic force required for reset of the image stabilization bracket 20, facilitating the reset movement of the image stabilization bracket 20.
[0067] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.
[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.
Claims
1. A drive motor, characterized in that, include: The base has a first receiving cavity; A stabilizing bracket is located in the first receiving cavity and is movably connected to the base; The image stabilization drive assembly includes a first coil, a first magnet, a second coil, and a second magnet. The first magnet and the second magnet are respectively disposed on adjacent sides of the image stabilization bracket and connected to the image stabilization bracket. The first coil and the second coil are respectively disposed corresponding to the first magnet and the second magnet. The first coil and the first magnet are used to drive the image stabilization bracket to move along a first direction, and the second coil and the second magnet are used to drive the image stabilization bracket to move along a second direction. A magnetic suction assembly includes a first magnetic suction member and a second magnetic suction member. The first magnetic suction member and the second magnetic suction member are respectively disposed on the base corresponding to the first magnet and the second magnet. The first magnetic suction member has two magnetic suction portions arranged along the first direction, and the two magnetic suction portions of the first magnetic suction member are used to provide opposite magnetic suction forces to the image stabilization bracket along the first direction. And / or, the second magnetic suction member has two magnetic suction portions arranged along the second direction, and the two magnetic suction portions of the second magnetic suction member are used to provide opposite magnetic suction forces to the image stabilization bracket along the second direction.
2. The drive motor as described in claim 1, characterized in that, The first magnet has a first central axis extending along the second direction, and the two magnetic attracting parts of the first magnetic attractor are located on different sides of the first central axis. The second magnet has a second central axis extending along the first direction, and the two magnetic attracting parts of the second magnetic attractor are located on different sides of the second central axis.
3. The drive motor as described in claim 1, characterized in that, The number of first magnetic components is two, and the two first magnetic components are symmetrically arranged along the second direction, with each of the two first magnetic components corresponding to one end of the first magnet. The number of second magnetic components is also two, and the two second magnetic components are symmetrically arranged along the first direction, with each of the two second magnetic components corresponding to one end of the second magnet; or... The two magnetic suction portions of the first magnetic suction member extend along the second direction to their respective ends, corresponding to the two ends of the first magnet. The two magnetic suction portions of the second magnetic suction member extend along the first direction to their respective ends, corresponding to the two ends of the second magnet.
4. The drive motor as described in claim 1, characterized in that, The first magnetic attractor also has a connecting portion connecting its two magnetic attractor portions, and the second magnetic attractor also has a connecting portion connecting its two magnetic attractor portions. Both the first magnetic attractor and the second magnetic attractor are U-shaped, and the width of the connecting portion is smaller than the width of the magnetic attractor portion.
5. The drive motor as described in claim 1, characterized in that, The image stabilization bracket has a second receiving cavity, and the drive motor further includes: A focusing bracket is located in the second receiving cavity and is movably connected to the image stabilization bracket; The focusing drive assembly includes a first focusing drive component and a second focusing drive component. The first focusing drive component is disposed on the focusing bracket, and the second focusing drive component is disposed on the image stabilization bracket corresponding to the first focusing drive component. One of the first focusing drive component and the second focusing drive component is a focusing coil, and the other is a focusing magnet.
6. The drive motor as described in claim 5, characterized in that, The drive motor further includes at least two guide members, which are spaced apart from each other on the image stabilization bracket and located in the second receiving cavity, and the focusing bracket moves along the at least two guide members.
7. The drive motor as described in claim 5, characterized in that, The drive motor further includes an image stabilization circuit board and an elastic element. The image stabilization circuit board is located between the base and the image stabilization bracket and is connected to the base. The first coil and the second coil are disposed on the side of the image stabilization circuit board away from the base and are electrically connected to the image stabilization circuit board. The elastic element is disposed between the base and the image stabilization bracket to provide damping for the movement of the image stabilization bracket and elastic force during reset. The elastic element is conductive. The image stabilization bracket is embedded with conductive wires. One end of the conductive wires is electrically connected to the image stabilization circuit board, and the other end of the conductive wires is electrically connected to the focusing coil to supply power to the focusing coil.
8. The drive motor as described in claim 1, characterized in that, The drive motor further includes a rolling element that rolls against the anti-shake bracket and the base. The rolling element includes at least three rolling elements. The base has at least three first rolling grooves, and the anti-shake bracket has at least three second rolling grooves. The at least three first rolling grooves and the at least three second rolling grooves are arranged opposite to each other to accommodate the corresponding rolling elements. At least two of the first rolling grooves extend along the first direction or the second direction, and at least two of the second rolling grooves extend along the second direction or the first direction.
9. The drive motor as described in claim 7, characterized in that, The drive motor also includes a stabilization sensor, which is disposed on the side of the stabilization circuit board near the base and electrically connected to the stabilization circuit board, corresponding to the first coil and the second coil respectively.
10. A camera module, characterized in that, Includes the drive motor as described in any one of claims 1 to 9.