A camera module

Abstract

The application belongs to the technical field of camera modules, and discloses a camera module. The lens assembly of the camera module comprises a lens module and a lens support, the lens support comprises a fixed frame and a moving frame, the lens module is arranged on the moving frame in the axial direction of the lens module, the moving frame is arranged on the fixed frame in the radial direction of the lens module, the fixed frame is arranged on a circuit board, and the lens module has a balance position; a coil assembly is arranged around the lens assembly and is electrically connected with the circuit board, the coil assembly comprises an elastic telescopic section, the elastic telescopic section drives the lens module to return to the balance position; a magnetic assembly provides a directional magnetic field for the coil assembly, and the lens module is driven to move when the coil assembly is electrified to realize focusing and anti-shake. The camera module can drive the lens module to move quickly by using a small current, the sensitivity is improved, and the structure is simplified because the coil assembly integrates the function of a spring and ensures that the lens module can return to the balance position.

Description

Technical Field

[0001] This invention relates to the field of camera module technology, and more particularly to a camera module. Background Technology

[0002] The camera module is one of the core components in portable electronic devices (such as smartphones, tablets, and digital cameras) that enables image acquisition and imaging. As consumer electronics become increasingly thinner, lighter, and more powerful, users are placing higher and higher demands on the image quality, focusing speed, image stabilization performance, and overall size of camera modules.

[0003] Existing camera module structures typically include a magnet, a lens holder that can move along the optical axis or the stabilization direction, a coil, and an elastic reset component (such as a leaf spring or sheet spring) to provide a reset force. To avoid pulling on the coil, it is usually fixed in place, and the magnet is mounted on the lens holder. When the coil is energized, it drives the lens holder to move through the magnet.

[0004] However, the above structure results in a large overall weight of the lens mount, requiring a larger current to drive its movement. At the same time, the increased weight increases the inertia of the lens mount, making its movement less sensitive and severely affecting focusing speed and image stabilization performance. Summary of the Invention

[0005] The purpose of this invention is to provide a camera module that can drive the lens module to move quickly using a small current, thereby improving sensitivity. At the same time, since the coil assembly integrates the function of a spring, it ensures that the lens module can return to the balanced position, thus simplifying the structure.

[0006] To achieve this objective, the embodiments of the present invention adopt the following technical solutions: A camera module, comprising: Circuit board; A lens assembly includes a lens module and a lens bracket. The lens bracket includes a fixed bracket and a movable bracket. The lens module is movably mounted on the movable bracket along its own axial direction. The movable bracket is movably mounted on the fixed bracket along the radial direction of the lens module. The fixed bracket is mounted on the circuit board. The lens module has a balanced position. A coil assembly is wound around the lens assembly and electrically connected to the circuit board. The coil assembly includes an elastic telescopic section that drives the lens module to return to the equilibrium position. A magnetic component provides a directional magnetic field to the coil component, which drives the lens module to move when energized, thereby achieving focusing and image stabilization.

[0007] Preferably, the coil assembly includes a focusing coil, the focusing coil includes a focusing fixed section, the elastic telescopic section includes focusing elastic telescopic sections disposed at opposite ends of the focusing fixed section along a first direction, and the focusing fixed section is connected to the lens module; The magnetic component includes a first magnet that provides a directional magnetic field along a second direction, and the focusing elastic extension segment elastically extends and retracts along the axial direction of the lens module to drive the lens module back to the equilibrium position. The first direction and the second direction are set at an angle and are both perpendicular to the axial direction of the lens module.

[0008] Preferably, the focusing fixing section includes a first fixing arc section and a second fixing arc section, and a convex ring is provided on the outer periphery of the lens module. The first fixing arc section and the second fixing arc section surround the lens module, and the first fixing arc section is located on one side of the convex ring along the axial direction of the lens module, while the second fixing arc section is located on the other side of the convex ring along the axial direction of the lens module.

[0009] Preferably, the focusing fixed section further includes a first elastic transition section and a second elastic transition section. Both ends of the first fixed arc section are connected to the corresponding ends of the focusing elastic telescopic section through the first elastic transition section, and both ends of the second fixed arc section are connected to the corresponding ends of the focusing elastic telescopic section through the second elastic transition section.

[0010] Preferably, the focusing fixed section further includes a first outer ring arc segment, the first outer ring arc segment and the first fixed arc segment are spaced apart, the two ends of the first outer ring arc segment are connected to the focusing elastic extension segment at the corresponding end, and the first elastic transition segment is located between the first outer ring arc segment and the first fixed arc segment. The focusing fixed section further includes a second outer ring arc section, which is spaced apart from the second fixed arc section. The two ends of the second outer ring arc section are connected to the focusing elastic extension section at the corresponding ends, and the second elastic transition section is located between the second outer ring arc section and the second fixed arc section.

[0011] Preferably, the coil assembly further includes: The first anti-shake coil includes a first anti-shake fixed section, and the elastic telescopic section includes a first anti-shake elastic telescopic section disposed at opposite ends of the first anti-shake fixed section along a first direction. The first anti-shake fixed section is connected to the moving frame, and the first anti-shake elastic telescopic section elastically telescopics along the first direction. The second anti-shake coil includes a second anti-shake fixed section, and the elastic telescopic section includes a second anti-shake elastic telescopic section disposed at opposite ends of the second anti-shake fixed section along the second direction. The second anti-shake fixed section is connected to the moving frame, and the second anti-shake elastic telescopic section elastically telescopic along the second direction. The magnetic component includes a second magnet that provides a directional magnetic field along the axial direction of the lens module, wherein the first direction and the second direction are angled together and both are perpendicular to the axial direction of the lens module.

[0012] Preferably, the first anti-shake fixing section includes a first fixing ring, which surrounds the outer periphery of the movable frame and abuts against the movable frame; The second anti-shake fixing section includes a second fixing ring, which surrounds the outer periphery of the movable frame and abuts against the movable frame.

[0013] Preferably, the movable frame includes a movable sleeve, a first support frame, and a first ball bearing. The movable sleeve is radially movable on the fixed frame along the lens module. The first support frame is fixedly disposed inside the movable sleeve. The first support frame has a first retaining hole. The first ball bearing is rotatably disposed in the first retaining hole. The lens module is axially movable inside the movable sleeve and rotatably abuts against the first ball bearing.

[0014] Preferably, the first support frame is provided with a plurality of first retaining holes spaced apart circumferentially, and a first ball is rotatably disposed in each of the first retaining holes. The inner wall of the movable sleeve is provided with a plurality of first roller grooves extending axially along the lens module, and the outer wall of the lens module is provided with a plurality of second roller grooves extending axially along the lens module. Each first ball rolls against the corresponding first roller groove and second roller groove.

[0015] Preferably, the first support frame includes a support wall and a support platform disposed at the bottom of the support wall and extending radially outward, the first retaining hole is opened on the support wall, and the movable sleeve is sleeved on the outer periphery of the support wall and disposed on the support platform.

[0016] Preferably, the first support frame has a plurality of first retaining holes along the axial direction to form a retaining hole group, and the first support frame has a plurality of the retaining hole groups spaced apart along the circumferential direction, and each first retaining hole is provided with a first ball.

[0017] Preferably, the fixing frame includes a support ring, a second support frame, and a second ball bearing. The support ring is fixedly connected to the circuit board. The second support frame is disposed on the support ring and has a second retaining hole. The second ball bearing is rotatably disposed in the second retaining hole. The movable frame is rotatably disposed on the support ring along the radial direction of the lens module and rolls against the second ball bearing.

[0018] Preferably, the support ring is provided with a plurality of third grooves spaced apart along the circumference, and each second ball is rotatably disposed in the corresponding third groove.

[0019] Preferably, the camera module further includes an image sensor, which is disposed on the circuit board and spaced apart from the lens module. The image sensor receives light passing through the lens module and generates an image.

[0020] The beneficial effects of this invention are: This invention provides a camera module. In this camera module, the circuit board supports other components to ensure stability and also supplies power to the coil assembly. The lens bracket of the lens assembly supports and fixes the lens module, and the magnetic component provides a directional magnetic field. Since the coil assembly is wound around the lens assembly, when the circuit board powers the coil assembly, the coil assembly can drive the moving frame to move radially along the lens module to achieve image stabilization, or drive the lens module to move axially to achieve focusing. In this camera module, because the coil is connected to the lens assembly and the coil is very light, it does not cause a significant change in the overall weight of the lens assembly. This allows a small current to drive the lens module to move quickly, improving sensitivity. Furthermore, because the coil assembly has an elastic extension section, it essentially integrates the function of a spring, ensuring that the lens module can return to its balanced position, simplifying the structure. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the camera module provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the camera module with the protective cover removed, provided in an embodiment of the present invention; Figure 3 This is an exploded view of the camera module provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the focusing coil provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the lens module provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the lens holder provided in an embodiment of the present invention; Figure 7This is a schematic diagram of the structure of the image stabilization coil provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the support ring and mounting ring provided in an embodiment of the present invention.

[0022] In the picture: 1. Circuit board; 2. Lens assembly; 21. Lens module; 211. Convex ring; 212. Second roller groove; 22. Lens bracket; 221. Fixing bracket; 2211. Support ring; 22111. Third roller groove; 2212. Second support frame; 2213. Second ball bearing; 2214. Mounting ring; 222. Movable frame; 2221. Movable sleeve; 22211. First roller groove; 2222. First support frame; 22221. Support wall; 22222. Support platform; 2223. First ball bearing; 3. Coil assembly; 31. Focusing coil; 311. Focusing fixing section; 3111. First fixed arc-shaped section; 3112. Second fixed arc-shaped section; 3113. First elastic transition section; 3114. Second elastic transition section; 3115. First outer ring arc-shaped section; 3116. Second outer ring arc-shaped section; 312. Focusing elastic telescopic section; 32. Image stabilization coil; 321. First image stabilization coil; 3211. First image stabilization fixing section; 3212. First image stabilization elastic telescopic section; 322. Second image stabilization coil; 3221. Second image stabilization fixing section; 3222. Second image stabilization elastic telescopic section; 4. Magnetic components; 41. First magnet; 42. Second magnet; 5. Image sensor; 6. Protective cover; 61. Through hole; 7. Control module; 8. Gyroscope. Detailed Implementation

[0023] Embodiments of the present invention 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 components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," "fixed," "combined," "coupled," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection via an intermediate medium; or the internal communication of two components or the interaction between two components. As examples, a direct connection refers to two parts or components being connected together without the need for an intermediate medium, while an indirect connection refers to two parts or components each being connected to at least one intermediate medium, with the connection achieved through the intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0025] In the description of this invention, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this invention. Furthermore, in the context, it should be understood that when an element is mentioned as being "upper" or "lower" of another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "above," "on top of," "upper side of," and "above" of the first feature and the second feature include the first feature being directly above, to the upper left, to the upper right, to the upper front, and to the upper rear of the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. The terms "below," "under," "below," and "below" for "first feature" and "second feature" include situations where the first feature is directly below, to the lower left, to the lower right, in front of, or behind the second feature, or simply indicate that the first feature is at a lower horizontal level than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no specific meaning.

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] The camera module is one of the core components in portable electronic devices (such as smartphones, tablets, and digital cameras) that enables image acquisition and imaging. As consumer electronics become increasingly thinner, lighter, and more powerful, users are placing ever higher demands on the image quality, focusing speed, image stabilization performance, and overall size of camera modules. The structure of a camera module typically includes a magnet, a lens holder that can move along the optical axis or the image stabilization direction, a coil, and elastic reset components (such as leaf springs or sheet springs) to provide a reset force.

[0028] In existing technologies, to avoid pulling on the coil, the coil is usually fixed and the magnet is placed on the lens mount. When the coil is energized, the magnet drives the lens mount to move. However, this structure results in a large overall weight for the lens mount, requiring a larger current to drive its movement. Furthermore, the increased weight increases the inertia of the lens mount, making its movement less responsive and severely impacting focusing speed and image stabilization performance.

[0029] like Figures 1-3 As shown, to solve the above problems, the present invention provides a camera module, which includes a circuit board 1, a lens assembly 2, a coil assembly 3, and a magnetic assembly 4. The lens assembly 2 includes a lens module 21 and a lens bracket 22. The lens bracket 22 includes a fixed frame 221 and a movable frame 222. The lens module 21 is movably mounted on the movable frame 222 along its own axial direction, and the movable frame 222 is movably mounted on the fixed frame 221 along the radial direction of the lens module 21. The fixed frame 221 is mounted on the circuit board 1, and the lens module 21 has a balanced position. The coil assembly 3 is wound around the lens assembly 2 and electrically connected to the circuit board 1. The coil assembly 3 includes an elastic telescopic section, which drives the lens module 21 to return to the balanced position. The magnetic assembly 4 provides a directional magnetic field for the coil assembly 3. When the coil assembly 3 is energized, it drives the lens module 21 to move, thereby achieving focusing and image stabilization.

[0030] In this camera module, circuit board 1 supports other components to ensure stability and also supplies power to coil assembly 3. Lens bracket 22 of lens assembly 2 supports and fixes lens module 21, while magnetic component 4 provides a directional magnetic field. Since coil assembly 3 is wound around lens assembly 2, when circuit board 1 energizes coil assembly 3, coil assembly 3 can achieve image stabilization by driving moving frame 222 to move radially along lens module 21, or achieve focusing by driving lens module 21 to move axially. In this camera module, because the coil is connected to lens assembly 2 and the coil is very light, it does not cause a significant change in the overall weight of lens assembly 2. This allows a small current to drive lens module 21 to move quickly, improving sensitivity. Furthermore, because coil assembly 3 has an elastic extension section, it essentially integrates the function of a spring, ensuring that lens module 21 can return to its balanced position, simplifying the structure.

[0031] For ease of description, this embodiment uses a flat circuit board 1 as an example. That is, the coil assembly 3 drives the moving frame 222 to move in the horizontal plane to achieve the image stabilization function, and the coil assembly 3 drives the lens module 21 to move in the vertical direction to achieve the focusing function.

[0032] In this embodiment, the camera module also includes an image sensor 5, which is disposed on the circuit board 1 and spaced apart from the lens module 21. The image sensor 5 receives light passing through the lens module 21 and generates an image. After generating the image, the image sensor 5 needs to determine the image sharpness and, as needed, uses the control module 7 to perform focusing and image stabilization operations on the lens module 21 to ensure a clearer image is presented. The image sensor 5 is existing technology, and technicians can select appropriate products as needed; further details are omitted here.

[0033] like Figures 2-4 As shown, in this embodiment, the coil assembly 3 includes a focusing coil 31, which includes a focusing fixed section 311 and an elastic telescopic section including focusing elastic telescopic sections 312 disposed at opposite ends of the focusing fixed section 311 along a first direction. The focusing fixed section 311 is connected to the lens module 21. The magnetic assembly 4 includes a first magnet 41, which provides a directional magnetic field along a second direction. The focusing elastic telescopic section 312 elastically extends and retracts along the axial direction of the lens module 21 to drive the lens module 21 back to the equilibrium position. The first direction and the second direction are set at an angle and are both perpendicular to the axial direction of the lens module 21.

[0034] like Figure 3 As shown, both the first direction (X direction in the figure) and the second direction (Y direction in the figure) are horizontal. When the focusing coil 31 is energized, the current passes through a focusing elastic extension section 312, a focusing fixing section 311, and another focusing elastic extension section 312. When the current passes through the focusing fixing section 311, it can be equivalent to the current flowing in the forward or reverse direction along the first direction. Since the first magnet 41 provides a directional magnetic field along the second direction, according to the left-hand rule, the focusing fixing section 311 of the focusing coil 31 will be subjected to an Ampere force along the axis of the lens module 21, thereby driving the focusing fixing section 311 to move the lens module 21 vertically upward or downward, thus realizing the focusing function.

[0035] In this embodiment, the first magnet 41 can be a permanent magnet or an electromagnet.

[0036] like Figures 3-5As shown, the focusing fixing section 311 includes a first fixing arc section 3111 and a second fixing arc section 3112. A protruding ring 211 is provided on the outer periphery of the lens module 21. The first fixing arc section 3111 and the second fixing arc section 3112 surround the lens module 21. The first fixing arc section 3111 is located on one side of the protruding ring 211 along the axial direction of the lens module 21, and the second fixing arc section 3112 is located on the other side of the protruding ring 211 along the axial direction of the lens module 21.

[0037] The first fixed arc segment 3111 and the second fixed arc segment 3112 encircle the lens module 21, ensuring the radial stability of the lens module 21. The first fixed arc segment 3111 is located on one side of the convex ring 211 along the axial direction of the lens module 21, and the second fixed arc segment 3112 is located on the other side of the convex ring 211 along the axial direction of the lens module 21. This allows the lens module 21 to be integrated axially with the first fixed arc segment 3111 and the second fixed arc segment 3112. When current flows through the first fixed arc segment 3111 and the second fixed arc segment 3112, they move upwards or downwards, thus adjusting the focal length of the lens module 21.

[0038] Specifically, the first fixed arc segment 3111 bends in the positive direction of the second direction to form an arc, and the second fixed arc segment 3112 bends in the opposite direction of the second direction to form an arc, so that the first fixed arc segment 3111 and the second fixed arc segment 3112 are generally located on opposite sides of the lens module 21 in the radial direction, thereby ensuring that the lens module 21, the first fixed arc segment 3111 and the second fixed arc segment 3112 remain relatively stable in the radial direction.

[0039] In some embodiments, the focusing fixing section 311 further includes a fixing collar, and a fixing groove is formed on the outer periphery of the lens module 21, with the fixing collar being engaged in the fixing groove. This structure can ensure both the radial stability of the focusing fixing section 311 and the lens module 21 and the axial stability of the adjusting fixing section and the lens module 21.

[0040] like Figure 4 As shown, the focusing fixed section 311 also includes a first elastic transition section 3113 and a second elastic transition section 3114. Both ends of the first fixed arc section 3111 are connected to the corresponding end of the focusing elastic extension section 312 through the first elastic transition section 3113, and both ends of the second fixed arc section 3112 are connected to the corresponding end of the focusing elastic extension section 312 through the second elastic transition section 3114.

[0041] The setting of the first elastic transition section 3113 and the second elastic transition section 3114 increases the degree of freedom of the first fixed arc section 3111 and the second fixed arc section 3112. When it is necessary to drive the moving frame 222 to move to achieve the image stabilization function, the first fixed arc section 3111 and the second fixed arc section 3112 will also move in the horizontal plane. At this time, through the extension and retraction of the first elastic transition section 3113 and the second elastic transition section 3114, the offset of the focusing elastic extension section 312 in the horizontal plane can be reduced, avoiding fatigue of the focusing elastic extension section 312. At the same time, it can also help the lens module 21 return to the balanced position.

[0042] It is worth noting that although the first elastic transition section 3113 and the second elastic transition section 3114 mainly perform elastic extension and contraction in the first direction, when the focusing fixed section 311 is subjected to a driving force in the vertical direction, the first elastic transition section 3113 and the second elastic transition section 3114 can also adapt to the movement of the lens module 21 by deformation, without having to completely wait for the extension and contraction of the focusing elastic extension section 312, thus improving the response speed.

[0043] like Figure 4 As shown, in this embodiment, the focusing fixed section 311 further includes a first outer ring arc-shaped section 3115, which is spaced apart from the first fixed arc-shaped section 3111. Both ends of the first outer ring arc-shaped section 3115 are connected to the corresponding focusing elastic extension sections 312. By providing the first outer ring arc-shaped section 3115, the magnitude of the Ampere force on the focusing fixed section 311 can be further increased, thereby improving the focusing speed. Furthermore, the first elastic transition section 3113 is located between the first outer ring arc-shaped section 3115 and the first fixed arc-shaped section 3111, which can maximize the degree of freedom of the first fixed arc-shaped section 3111.

[0044] Similarly, the focusing fixed section 311 also includes a second outer ring arc-shaped section 3116, which is spaced apart from the second fixed arc-shaped section 3112. Both ends of the second outer ring arc-shaped section 3116 are connected to the corresponding focusing elastic extension sections 312. By providing the second outer ring arc-shaped section 3116, the magnitude of the Ampere force on the focusing fixed section 311 can be further increased, thereby improving the focusing speed. Furthermore, the second elastic transition section 3114 is located between the second outer ring arc-shaped section 3116 and the second fixed arc-shaped section 3112, maximizing the degree of freedom of the second fixed arc-shaped section 3112.

[0045] like Figure 1 and Figure 3As shown, to protect the lens module 21, this embodiment also includes a protective cover 6. The protective cover 6 is fixedly mounted on the circuit board 1, and a through hole 61 is provided on the top of the protective cover 6. The lens assembly 2, coil assembly 3, and magnetic assembly 4 are all disposed inside the protective cover 6. The top of the lens module 21 can extend out of the protective cover 6 through the through hole 61 or retract into the protective cover 6 through the through hole 61. In addition, to bring the first magnet 41 closer to the focusing fixing section 311, the first magnet 41 is fixedly mounted on the inner side of the protective cover 6. To increase the magnetic induction intensity of the directional magnetic field along the second direction, the magnetic assembly 4 includes two first magnets 41, which are spaced apart on opposite sides of the lens module 21 along the second direction, and the magnetic poles of the two first magnets 41 have the same direction. In some other embodiments, the magnetic assembly 4 may also include multiple first magnets 41, as long as the directional magnetic field formed by the multiple first magnets 41 is along the second direction.

[0046] like Figure 3 and Figure 6 As shown, the movable frame 222 includes a movable sleeve 2221, a first support frame 2222, and a first ball bearing 2223. The movable sleeve 2221 is radially movable on the fixed frame 221 along the lens module 21. The first support frame 2222 is fixedly installed inside the movable sleeve 2221. The first support frame 2222 has a first retaining hole. The first ball bearing 2223 is rotatably installed in the first retaining hole. The lens module 21 is axially movable inside the movable sleeve 2221 and rotatably abuts against the first ball bearing 2223.

[0047] The first support frame 2222 is used to stabilize the first ball bearing 2223. Through the constraint of the movable sleeve 2221 and the lens module 21, the first ball bearing 2223 can only rotate within the first retaining hole. Simultaneously, the first ball bearing 2223 can radially restrict the movement of the lens module 21, ensuring that the lens module 21 can only move axially. When the lens module 21 moves along its own axial direction, the rolling contact with the first ball bearing 2223 reduces the resistance to movement of the lens module 21, improving the sensitivity and accuracy of the lens module 21's movement during focusing.

[0048] like Figure 3 and Figure 5As shown, in this embodiment, the first support frame 2222 is provided with a plurality of first retaining holes spaced apart circumferentially. A first ball bearing 2223 is rotatably disposed within each first retaining hole. The inner wall of the movable sleeve 2221 has a plurality of first roller grooves 22211 extending axially along the lens module 21, and the outer wall of the lens module 21 has a plurality of second roller grooves 212 extending axially along the lens module 21. Each first ball bearing 2223 rolls against the corresponding first roller groove 22211 and second roller groove 212. The arrangement of the first roller grooves 22211 and second roller grooves 212 can limit the relative angle between the movable sleeve 2221 and the lens module 21, preventing the lens module 21 from rotating.

[0049] Preferably, the first support frame 2222 has multiple first retaining holes along the axial direction to form a retaining hole group, and the first support frame 2222 has multiple sets of retaining hole groups spaced apart in the circumferential direction. Each first retaining hole is provided with a first ball bearing 2223. This structure can further improve the radial stability of the lens module 21, and at the same time ensure that when the lens module 21 moves along the axial direction, the outer periphery of the lens module 21 always rolls and abuts against a portion of the first ball bearing 2223. In addition, in this structure, the first ball bearing 2223 in each retaining hole group is located within the corresponding first rolling groove 22211 and second rolling groove 212, which not only ensures that there is no relative rotation between the moving sleeve 2221 and the lens module 21, but also ensures that the moving sleeve 2221 and the lens module 21 do not tilt relative to each other, thus improving stability.

[0050] like Figure 3 and Figure 6 As shown, the first support frame 2222 further includes a support wall 22221 and a support platform 22222 disposed at the bottom of the support wall 22221 and extending radially outward. A first retaining hole is formed on the support wall 22221, and a movable sleeve 2221 is sleeved on the outer periphery of the support wall 22221 and disposed on the support platform 22222. The support platform 22222 can axially limit and fix the movable sleeve 2221, ensuring the relative stability between the first support frame 2222 and the movable sleeve 2221.

[0051] like Figure 2 , Figure 3 and Figure 7As shown, the coil assembly 3 also includes a stabilization coil 32, which is used to drive the moving frame 222 to move in the directional magnetic field provided by the magnetic assembly 4 to achieve stabilization. Specifically, the first image stabilization coil 321 and the second image stabilization coil 322 are included. The first image stabilization coil 321 includes a first image stabilization fixed section 3211 and an elastic telescopic section including first image stabilization elastic telescopic sections 3212 disposed at opposite ends of the first image stabilization fixed section 3211 along a first direction. The first image stabilization fixed section 3211 is connected to the moving frame 222, and the first image stabilization elastic telescopic section 3212 elastically extends and retracts along the first direction. The second image stabilization coil 322 includes a second image stabilization fixed section 3221 and an elastic telescopic section including second image stabilization elastic telescopic sections 3222 disposed at opposite ends of the second image stabilization fixed section 3221 along a second direction. The second image stabilization fixed section 3221 is connected to the moving frame 222, and the second image stabilization elastic telescopic section 3222 elastically extends and retracts along the second direction. The magnetic component 4 includes a second magnet 42, which provides a directional magnetic field along the axial direction of the lens module 21.

[0052] When the first image stabilization coil 321 is energized, current flows through a first image stabilization elastic telescopic section 3212, a first image stabilization fixed section 3211, and another section of the first image stabilization elastic telescopic section 3212. When current flows through the first image stabilization fixed section 3211, it can be equivalent to current flowing in either the forward or reverse direction along a first direction. Since the second magnet 42 provides a directional magnetic field along the axis of the lens module 21, according to the left-hand rule, the first image stabilization fixed section 3211 of the first image stabilization coil 321 will be subjected to an Ampere force along a second direction, thereby driving the first image stabilization fixed section 3211 to move the moving frame 222 along the second direction, thus achieving image stabilization in the second direction.

[0053] Similarly, when the second image stabilization coil 322 is energized, current flows through one section of the second image stabilization elastic telescopic section 3222, the second image stabilization fixed section 3221, and another section of the second image stabilization elastic telescopic section 3222. When current flows through the second image stabilization fixed section 3221, it can be equivalent to current flowing in either the forward or reverse direction along the second direction. Since the second magnet 42 provides a directional magnetic field along the axis of the lens module 21, according to the left-hand rule, the second image stabilization fixed section 3221 of the second image stabilization coil 322 will be subjected to an Ampere force along the first direction, thereby driving the second image stabilization fixed section 3221 to move the moving frame 222 along the first direction, thus achieving image stabilization in the first direction.

[0054] The first image stabilization elastic telescopic section 3212 and the second image stabilization elastic telescopic section 3222 can both have the freedom of movement of the first image stabilization fixed section 3211 and the second image stabilization fixed section 3221 when the image stabilization function is activated, and can also drive the moving frame 222 to move after the image stabilization function is fully activated, so that the lens module 21 returns to the balanced position.

[0055] In this embodiment, the second magnet 42 can be a permanent magnet or an electromagnet.

[0056] like Figure 2 , Figure 3 and Figure 7 As shown, the first anti-shake fixing section 3211 includes a first fixing ring, which surrounds the outer periphery of the movable frame 222 and abuts against the movable frame 222. When the first anti-shake coil 321 is energized, current flows from one end of the first fixing ring to the other end in a first direction, which is equivalent to the two sections of the first anti-shake fixing section 3211 being connected by a wire extending in the first direction. This ensures that when the first anti-shake coil 321 is energized, the first fixing ring will be subjected to an Ampere force in the second direction, and the first fixing ring can drive the movable base to move in the second direction.

[0057] Similarly, the second anti-shake fixing section 3221 includes a second fixing ring, which surrounds the outer periphery of the movable frame 222 and abuts against the movable frame 222. When the second anti-shake coil 322 is energized, current flows from one end of the second fixing ring to the other end in the second direction. This is equivalent to the two sections of the second anti-shake fixing section 3221 being connected by a wire extending in the second direction, thereby ensuring that when the second anti-shake coil 322 is energized, the second fixing ring is subjected to an Ampere force in the first direction, and the second fixing ring can drive the movable base to move in the first direction.

[0058] like Figure 3 , Figure 6 and Figure 8 As shown, in this embodiment, the fixed frame 221 includes a support ring 2211, a second support frame 2212, and a second ball bearing 2213. The support ring 2211 is fixedly connected to the circuit board 1. The second support frame 2212 is disposed on the support ring 2211 and has a second retaining hole. The second ball bearing 2213 is rotatably disposed in the second retaining hole. The movable frame 222 is rotatably disposed on the support ring 2211 along the radial direction of the lens module 21 and rolls against the second ball bearing 2213. Specifically, the support platform 22222 of the first support frame 2222 of the movable frame 222 abuts against the second ball bearing 2213.

[0059] The second support frame 2212 is used to stabilize the second ball bearing 2213. Through the constraint of the support ring 2211 and the movable frame 222, the second ball bearing 2213 can only rotate within the second retaining hole. Simultaneously, the second ball bearing 2213 can axially restrict the movement of the movable frame 222, ensuring that the movable frame 222 can only move in the horizontal plane. When the movable frame 222 moves in the horizontal plane, the rolling contact with the second ball bearing 2213 reduces the moving resistance of the movable frame 222, improving the sensitivity and accuracy of the lens module 21 movement during image stabilization.

[0060] Preferably, the second support frame 2212 is provided with a plurality of second retaining holes spaced apart along the circumference, and each second retaining hole is provided with a second ball bearing 2213 to further improve the stability of the moving frame 222 in the horizontal plane.

[0061] like Figure 8 As shown, the support ring 2211 has multiple third roller grooves 22111 spaced apart along the circumference, and each second ball 2213 is rolled within the corresponding third roller groove 22111. The third roller grooves 22111 restrict the degree of freedom of the second support frame 2212 on the horizontal plane, ensuring that the second support frame 2212 and the support ring 2211 remain relatively stationary, thus improving stability.

[0062] like Figure 2 , Figure 6 and Figure 8 As shown, the mounting bracket 221 also includes mounting rings 2214, which are spaced apart above the support ring 2211. A second magnet 42 is disposed on the mounting rings 2214. Specifically, the second magnet 42 can be disposed on the upper or lower surface of the mounting ring 2214, mainly determined by the positions of the first anti-shake fixing section 3211 and the second anti-shake fixing section 3221, to ensure that the magnetic induction intensity at the positions of the first anti-shake fixing section 3211 and the second anti-shake fixing section 3221 is maximized.

[0063] In order to increase the magnetic induction intensity of the directional magnetic field along the axial direction of the lens module 21, the magnetic component 4 includes a plurality of second magnets 42, which are arranged circumferentially on the mounting ring 2214 at intervals, and the magnetic poles of the plurality of second magnets 42 are in the same direction.

[0064] like Figures 1-3 As shown, the camera module also includes a control module 7 and a gyroscope 8. Both the control module 7 and the gyroscope 8 are mounted on and electrically connected to the circuit board 1, and the control module 7 is communicatively connected to the gyroscope 8. The gyroscope 8 can sense the rotation and direction changes of the device itself by measuring the angular velocity of actions such as deflection and tilt. The control module 7 can calculate the specific displacement distance and displacement direction required for the anti-shake operation to compensate for the shake of the lens module 21 based on the information from the gyroscope 8, and achieve the anti-shake operation by passing appropriate current through the first anti-shake coil 321 and the second anti-shake coil 322.

[0065] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A camera module, characterized in that, include: Circuit board (1); The lens assembly (2) includes a lens module (21) and a lens bracket (22). The lens bracket (22) includes a fixed frame (221) and a movable frame (222). The lens module (21) is movably mounted on the movable frame (222) along its own axis. The movable frame (222) is movably mounted on the fixed frame (221) along the radial direction of the lens module (21). The fixed frame (221) is mounted on the circuit board (1). The lens module (21) has a balanced position. A coil assembly (3) is wound around the lens assembly (2) and electrically connected to the circuit board (1). The coil assembly (3) includes an elastic telescopic section that drives the lens module (21) to return to the equilibrium position. The magnetic component (4) provides a directional magnetic field to the coil component (3). When the coil component (3) is energized, it drives the lens module (21) to move, thereby achieving focusing and image stabilization.

2. The camera module according to claim 1, characterized in that, The coil assembly (3) includes a focusing coil (31), the focusing coil (31) includes a focusing fixed section (311), the elastic telescopic section includes focusing elastic telescopic sections (312) disposed at opposite ends of the focusing fixed section (311) along a first direction, and the focusing fixed section (311) is connected to the lens module (21). The magnetic component (4) includes a first magnet (41) that provides a directional magnetic field along a second direction. The focusing elastic extension segment (312) elastically extends and retracts along the axial direction of the lens module (21) to drive the lens module (21) back to the equilibrium position. The first direction and the second direction are set at an angle and are both perpendicular to the axial direction of the lens module (21).

3. The camera module according to claim 2, characterized in that, The focusing fixing section (311) includes a first fixed arc section (3111) and a second fixed arc section (3112). The lens module (21) has a convex ring (211) on its outer periphery. The first fixed arc section (3111) and the second fixed arc section (3112) surround the lens module (21). The first fixed arc section (3111) is located on one side of the convex ring (211) along the axial direction of the lens module (21), and the second fixed arc section (3112) is located on the other side of the convex ring (211) along the axial direction of the lens module (21).

4. The camera module according to claim 3, characterized in that, The focusing fixed section (311) further includes a first elastic transition section (3113) and a second elastic transition section (3114). Both ends of the first fixed arc section (3111) are connected to the corresponding ends of the focusing elastic telescopic section (312) through the first elastic transition section (3113). Both ends of the second fixed arc section (3112) are connected to the corresponding ends of the focusing elastic telescopic section (312) through the second elastic transition section (3114).

5. The camera module according to claim 4, characterized in that, The focusing fixed section (311) further includes a first outer ring arc section (3115), the first outer ring arc section (3115) and the first fixed arc section (3111) are spaced apart, the two ends of the first outer ring arc section (3115) are connected to the focusing elastic extension section (312) at the corresponding ends, and the first elastic transition section (3113) is located between the first outer ring arc section (3115) and the first fixed arc section (3111); The focusing fixed section (311) further includes a second outer ring arc section (3116), which is spaced apart from the second fixed arc section (3112). The two ends of the second outer ring arc section (3116) are connected to the corresponding ends of the focusing elastic extension section (312), and the second elastic transition section (3114) is located between the second outer ring arc section (3116) and the second fixed arc section (3112).

6. The camera module according to claim 1, characterized in that, The coil assembly (3) also includes: The first anti-shake coil (321) includes a first anti-shake fixed section (3211), and the elastic telescopic section includes a first anti-shake elastic telescopic section (3212) disposed at opposite ends of the first anti-shake fixed section (3211) along a first direction. The first anti-shake fixed section (3211) is connected to the moving frame (222), and the first anti-shake elastic telescopic section (3212) elastically telescopics along the first direction. The second anti-shake coil (322) includes a second anti-shake fixed section (3221), and the elastic telescopic section includes a second anti-shake elastic telescopic section (3222) disposed at opposite ends of the second anti-shake fixed section (3221) along the second direction. The second anti-shake fixed section (3221) is connected to the moving frame (222), and the second anti-shake elastic telescopic section (3222) elastically telescopics along the second direction. The magnetic component (4) includes a second magnet (42) that provides a directional magnetic field along the axial direction of the lens module (21), wherein the first direction and the second direction are set at an angle and are both perpendicular to the axial direction of the lens module (21).

7. The camera module according to claim 6, characterized in that, The first anti-shake fixing section (3211) includes a first fixing ring, which surrounds the outer periphery of the movable frame (222) and abuts against the movable frame (222); The second anti-shake fixing section (3221) includes a second fixing ring, which surrounds the outer periphery of the movable frame (222) and abuts against the movable frame (222).

8. The camera module according to any one of claims 1 to 7, characterized in that, The movable frame (222) includes a movable sleeve (2221), a first support frame (2222), and a first ball bearing (2223). The movable sleeve (2221) is radially disposed on the fixed frame (221) along the lens module (21). The first support frame (2222) is fixedly disposed inside the movable sleeve (2221). The first support frame (2222) has a first retaining hole. The first ball bearing (2223) is rotatably disposed inside the first retaining hole. The lens module (21) is axially disposed inside the movable sleeve (2221) and rotatably abuts against the first ball bearing (2223).

9. The camera module according to claim 8, characterized in that, The first support frame (2222) is provided with a plurality of first retaining holes spaced apart in the circumferential direction. Each first retaining hole is provided with a first ball bearing (2223). The inner wall of the movable sleeve (2221) is provided with a plurality of first roller grooves (22211) extending along the axial direction of the lens module (21). The outer wall of the lens module (21) is provided with a plurality of second roller grooves (212) extending along the axial direction of the lens module (21). Each first ball bearing (2223) rolls against the corresponding first roller groove (22211) and second roller groove (212).

10. The camera module according to claim 8, characterized in that, The first support frame (2222) includes a support wall (22221) and a support platform (22222) disposed at the bottom of the support wall (22221) and extending radially outward. The first retaining hole is opened on the support wall (22221), and the movable sleeve (2221) is sleeved on the outer periphery of the support wall (22221) and disposed on the support platform (22222).

11. The camera module according to claim 8, characterized in that, The first support frame (2222) has a plurality of first retaining holes along the axial direction to form a retaining hole group. The first support frame (2222) has a plurality of the retaining hole groups spaced apart along the circumferential direction. Each first retaining hole is provided with a first ball (2223).

12. The camera module according to any one of claims 1 to 7, characterized in that, The fixed frame (221) includes a support ring (2211), a second support frame (2212), and a second ball bearing (2213). The support ring (2211) is fixedly connected to the circuit board (1). The second support frame (2212) is disposed on the support ring (2211). The second support frame (2212) has a second retaining hole. The second ball bearing (2213) is rotatably disposed in the second retaining hole. The movable frame (222) is rotatably disposed on the support ring (2211) along the radial direction of the lens module (21) and rolls against the second ball bearing (2213).

13. The camera module according to claim 12, characterized in that, The support ring (2211) is provided with a plurality of third roller grooves (22111) spaced apart along the circumference, and each second ball (2213) is rolled in the corresponding third roller groove (22111).

14. The camera module according to any one of claims 1 to 7, characterized in that, The camera module also includes an image sensor (5), which is disposed on the circuit board (1) and spaced apart from the lens module (21). The image sensor (5) receives light passing through the lens module (21) and generates an image.

Images