AF guide column and OIS suspended motor structure
Through the motor structure of AF guide column and OIS suspension, the shaking problem of the lens when moving in the Z-axis direction is solved, the accurate focus and anti-shake of the lens module are achieved, and the guidance accuracy and reliability of the lens module are improved.
Patent Information
- Application Number
- CN202422444475.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-08-30
- Filing Date
- 2024-10-10
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-10
AI Technical Summary
In traditional OIS motors, the lens is prone to shake when moving in the Z-axis direction, resulting in insufficient guidance and affecting the automatic focus and optical anti-hand shock function.
The motor structure of AF guide column and OIS suspension is adopted, and the AF guide column and OIS drive assembly are combined. The AF guide column is combined with the limit slot of the frame and lens module to achieve accurate focus and anti-shake of the lens module. Lubricating oil is applied to the outside of the AF guide column to enhance the damping effect.
It improves the focus reliability and guidance accuracy of the lens module, reduces the impact of the magnetic field on the adjacent motor, reduces magnetic leakage, and enhances the linear guidance effect of the lens module.
Smart Images
Figure CN223123298U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of optical imaging, and particularly to a motor structure of an AF guide post and an OIS suspension. Background Art
[0002] With the rapid development of technology, electronic devices in modern society have entered a new stage. It is not difficult for us to find that many daily-use electronic products, such as smart phones or digital cameras, already have powerful photo-taking and video-recording functions. These functions are no longer limited to professional photographic equipment, but have become increasingly popular and an indispensable part of our lives. To meet the needs of the vast number of consumers, these electronic devices are also increasingly focusing on convenience and thinness in design, striving to maintain a light appearance and portability while providing rich functions.
[0003] Among these electronic devices with photo-taking or video-recording functions, the lens driving device undoubtedly plays a crucial role. It is responsible for driving the optical components in the lens to move precisely, thereby realizing the functions of autofocus and optical image stabilization. When we press the shutter or video button, light passes through the optical components of the lens and finally focuses on the photosensitive component to form a clear and stable image.
[0004] Mobile phone camera modules are developing towards higher resolutions and higher-pixel digital camera modes. A major drawback of this development is that the lens is getting larger and larger, resulting in an increase in the overall size and the weight of the moving parts that need to be supported. Coupled with the addition of variable apertures, the weight that needs to be supported cannot be borne by ordinary suspension wire structures. Generally, traditional OIS motors use a structure of elastic pieces + suspension wires. The elastic pieces are used for reset and focusing actions, and the suspension wires are used for anti-shake actions. When performing the focusing action, that is, when the carrier moves in the Z-axis direction, it is easy to shake within the frame, resulting in insufficient guiding of the Z-axis movement and large tilts, causing the focusing and anti-shake functions to fail. Summary of the Utility Model
[0005] In order to solve the above problems of the prior art, the utility model provides a motor structure of an AF guide post and an OIS suspension.
[0006] To achieve the above object, the main technical solutions adopted by the utility model include:
[0007] A motor structure of an AF guide post and an OIS suspension, comprising
[0008] a housing, within which a hollow cavity is formed;
[0009] A frame, which is arranged in a hollow cavity and can move perpendicular to the optical axis direction; an OIS driving component for driving the movement of the frame is arranged between the frame and the housing; upper elastic pieces are fixedly connected to the corners of the frame; the upper elastic pieces are connected to the housing through suspension wires.
[0010] A lens module, which is arranged in the frame and can move along the optical axis direction; an AF driving component for driving the movement of the lens module is arranged between the lens module and the frame; the lens module is connected to the frame through AF guiding columns.
[0011] Furthermore, the housing includes an outer cover and a base; the bottom of the outer cover is open and fixedly connected to the base to form a hollow cavity inside.
[0012] Furthermore, the AF driving component includes an AF driving magnet arranged on the side of the lens module and an AF driving coil located inside the frame and arranged opposite to the AF driving magnet.
[0013] Furthermore, the OIS driving component includes an OIS driving magnet arranged on the frame and an OIS driving coil located on the housing and arranged opposite to the OIS driving magnet.
[0014] Furthermore, a second limiting groove for cooperating with the AF guiding column is arranged on the frame; a first limiting groove for cooperating with the AF guiding column is arranged on the outside of the lens module.
[0015] Furthermore, two AF guiding columns are arranged in parallel on the same side; the second limiting groove and the first limiting groove are V-shaped grooves; the AF guiding columns are arranged along the optical axis direction; an AF driving coil and a magnetic attracting sheet for cooperating with the AF driving magnet in the AF driving component are arranged on the frame.
[0016] Furthermore, a limiting portion for cooperating with the lens module is arranged at the top of the second limiting groove to prevent the lens module from detaching from the frame.
[0017] Furthermore, a plurality of limiting blocks are formed by outward extension on the side of the lens module; limiting grooves for cooperating with the limiting blocks are arranged on the frame to limit the displacement distance of the lens module along the optical axis direction.
[0018] Furthermore, an FPC board is arranged on the frame; a magnetic attracting sheet for cooperating with the AF driving magnet is fixed on the FPC board; an AF driving coil is connected to the other side of the FPC board opposite to the magnetic attracting sheet; the FPC board is electrically connected to a part of the upper elastic piece through a buried metal piece buried in the frame.
[0019] Furthermore, the material of the AF guiding column is metal or plastic or ceramic.
[0020] The beneficial effects of the present utility model are as follows: Using the AF guiding column as the guiding structure can effectively improve the reliability of AF. The guiding function of the AF guiding column has a better linear guiding effect, effectively improving the direction accuracy of the displacement during focusing. The lubricating oil applied to the outside of the AF guiding column also has the damping effect of AF gel; the setting of the magnet sheet can, on the one hand, cooperate with the AF driving magnet to clamp the AF guiding column, ensuring the directionality of the movement of the lens module, and on the other hand, can reduce the magnetic leakage of the magnetic field on this side and reduce the influence on the adjacent motor; the buried metal part is used to realize the electrical connection between the FPC board and the circuit board in the base; the suspension line is, on the one hand, a guiding part for the movement of the frame along the direction perpendicular to the optical axis and, on the other hand, is used for conducting electricity and serves as an electrical connection component for the electrical connection between the FPC board and the circuit in the base. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.
[0022] Figure 1 is the exploded view of the structure of the present utility model;
[0023] Figure 2 is the exploded view of the frame structure of the present utility model;
[0024] Figure 3 is the exploded view of another embodiment of the structure of the present utility model;
[0025] Description of the reference numerals:
[0026] 100, housing; 110, base; 120, outer cover; 200, frame; 210, OIS driving assembly; 211, OIS driving magnet; 212, OIS driving coil; 220, upper elastic sheet; 230, suspension line; 240, FPC board; 250, buried metal part; 260, magnet sheet; 270, second limiting groove; 271, limiting part; 280, limiting groove; 300, lens module; 310, AF driving assembly; 311, AF driving magnet; 312, AF driving coil; 320, lens holder; 330, lens; 340, limiting block; 350, AF guiding column; 351, first limiting groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] An AF guiding column and OIS suspension motor structure, including a housing 100, the housing 100 generally consists of a combination of an outer cover 120 and a base 110; the bottom of the outer cover 120 is open and fixedly connected to the base 110 to form a hollow cavity inside; in one embodiment, the housing 100 may only include the base 110, and the main function of the outer cover 120 is for limiting, to prevent the internal moving parts from detaching. When the internal moving parts cooperate with the base 110 through the limiting structure, the structure of the outer cover 120 can be omitted; in one embodiment, the top of the lens module 300 is provided with a cover plate (not shown in the figure) fixedly connected to the frame 200; the cover plate can be used to limit the lens module 300 to prevent the lens module 300 from detaching from the top of the frame 200; in one embodiment, the frame 200 is provided with several limiting parts 271 for preventing the lens module 300 from detaching from the frame 200; in one embodiment, the lens module 300 can be set as an integrated structure, that is, the common lens mount 320 and the lens 330 are set as an integrated structure, so as to reduce the occupation of space and further reduce the size of the camera module; at the same time, the lens module 300 can also be set as a conventional split structure including the lens mount 320 and the lens 330, and assembled and used during production; several limiting blocks 340 extend outward from the side of the lens module 300; the frame 200 is provided with a limiting groove 280 that cooperates with the limiting blocks 340 to limit the displacement distance of the lens module 300 along the optical axis direction. Usually, the limiting groove 280 limits the downward movement position of the lens module 300, and the limiting part 271 limits the upward movement position of the lens module 300.
[0031] Inside the hollow cavity, there is also a lens module 300 that can move along the optical axis direction and a frame 200 that moves perpendicular to the optical axis direction; the optical axis direction usually refers to the optical axis direction of the lens module 300, that is, the propagation direction of light entering the lens module 300; an AF driving component 310 is provided between the lens module 300 and the frame 200; through the AF driving component 310, the lens module 300 is moved along the optical axis direction to achieve focus adjustment, such as Figure 1 moving in the Z-axis direction; the AF driving component 310 generally includes an AF driving magnet 311 arranged on the side of the lens module 300 and an AF driving coil 312 located inside the frame 200 and arranged opposite to the AF driving magnet 311; the AF driving coil 312 controls the AF driving magnet 311 to drive the lens module 300 to move along the optical axis; usually, a Hall sensor is also provided inside the AF driving coil 312, which can accurately sense the moving position of the AF driving magnet 311 to achieve more accurate position control.
[0032] The frame 200 can move in a direction perpendicular to the optical axis; an OIS driving component 210 is provided between the frame 200 and the housing 100, specifically, an OIS driving component 210 is provided between the frame 200 and the base 110; the OIS driving component 210 is used to realize the movement of the frame 200 in a direction perpendicular to the optical axis, so as to realize the anti-shake function of the lens module 300. The movement in a direction perpendicular to the optical axis usually includes movements in the X-axis and Y-axis directions as shown in Figure 1 ; the OIS driving component 210 includes an OIS driving magnet 211 provided on the frame 200 and an OIS driving coil 212 provided on the base 110 opposite to the OIS driving magnet 211; an upper elastic sheet 220 is fixedly connected to the corner of the frame 200, and the upper elastic sheet 220 is connected to the base 110 through a suspension wire 230. On the one hand, the suspension wire 230 serves as a guiding structure for the movement of the frame 200 in a direction perpendicular to the optical axis, and on the other hand, it serves as an electrical connection member to realize the electrical connection with the circuit board in the base 110;
[0033] In an embodiment, an FPC board 240 is provided on the frame 200; a magnet attracting sheet 260 that cooperates with the AF driving magnet 311 is fixed on the FPC board 240; an AF driving coil 312 is connected to the other side of the FPC board 240 opposite to the magnet attracting sheet 260; the FPC board 240 is electrically connected to a part of the upper elastic sheet 220 through an embedded metal part 250 embedded in the frame 200; usually four upper elastic sheets 220 are provided, two of the upper elastic sheets 220 are arranged close to the FPC board 240, and the upper elastic sheets 220 can be directly welded to the FPC board. For the two upper elastic sheets 220 arranged far from the FPC board 240, they are welded to the FPC board by using the embedded metal part 250 embedded in the frame 200, and then the electrical connection with the base 110 is realized by using the suspension wire 230;
[0034] In one embodiment, an AF guide post 350 is provided between the lens module 300 and the frame 200; a second limiting groove 270 mating with the AF guide post 350 is provided on the frame 200; a first limiting groove 351 mating with the AF guide post 350 is provided on the lens module 300; two AF guide posts 350 are arranged in parallel on the same side; the second limiting groove 270 and the first limiting groove 351 are arranged as V-shaped grooves; the AF guide post 350 is arranged along the optical axis direction; guiding by the AF guide post 350 has better linear directivity; a magnet sheet 260 mating with an AF driving magnet 311 in the AF driving assembly 310 is provided on the frame 200; by the cooperation of the magnet sheet 260 and the AF driving magnet 311, the AF guide post 350 can be clamped therebetween by the adsorption force, the AF driving coil 312 drives the AF driving magnet 311 to move along the optical axis direction, the AF guide post 350 has better perpendicularity and is more impact-resistant than the traditional ball type or wire type; at the same time, the magnet sheet 260 can also reduce the magnetic leakage of the magnetic field on this side and reduce the influence on the adjacent motor;
[0035] In one embodiment, the material of the AF guide post 350 is metal or plastic or ceramic; in one embodiment, the AF guide post 350 can be injection-molded together with the frame 200 using plastic, further reducing the cost, and at the same time, the friction coefficient is also low, which is beneficial to the control of the moving part; that is to say, the AF guide post 350 can work as an independent component. Usually, when using metal or ceramic, the AF guide post 350 is an independent component, or it can also be integrated with the frame 200 to realize the guiding of the lens module 300;
[0036] As Figure 1-2 shown, in one embodiment, three OIS driving coils 212 are arranged along the circumference of the base 110, three OIS driving magnets 211 are correspondingly arranged on the frame 200, and the magnet sheet 260 is arranged on the side where the OIS driving magnet 211 is not provided, which can effectively reduce the magnetic leakage of the magnetic field;
[0037] As Figure 3 shown, in one embodiment, two OIS driving coils 212 are arranged along the circumference of the base 110, usually adjacent to each other and located at the edge of the base 110, and two OIS driving magnets 211 are correspondingly arranged on the frame 200 and are arranged opposite to the OIS driving coils 212; the AF driving magnet 311 is arranged on the side of the lens module 300, and the projection of the AF driving magnet 311 on the base 110 does not coincide with the OIS driving coil 212; there are a total of three pairs of AF driving magnets 311 and OIS driving magnets 211, which are respectively arranged opposite to one side of the base 110 to reduce magnetic interference, and the reduction of the number of driving magnets also helps to reduce the cost.
[0038] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, shall similarly be included within the patent protection scope of the present utility model.
Claims
1. An AF guiding column and OIS suspension motor structure, characterized in that: including a housing (100) in which a hollow cavity is formed; a frame (200) disposed in the hollow cavity and movable perpendicular to the optical axis direction; an OIS driving component (210) for driving the movement of the frame (200) is provided between the frame (200) and the housing (100); upper elastic pieces (220) are fixedly connected to the corners of the frame (200); the upper elastic pieces (220) are connected to the housing (100) through suspension lines (230); a lens module (300) disposed in the frame (200) and movable along the optical axis direction; an AF driving component (310) for driving the movement of the lens module (300) is provided between the lens module (300) and the frame (200); the lens module (300) is connected to the frame (200) through AF guiding columns (350).
2. The motor structure of an AF guiding post and an OIS suspension according to claim 1, characterized in that: The housing (100) includes an outer cover (120) and a base (110); the bottom of the outer cover (120) is open and fixedly connected to the base (110) to form a hollow cavity inside.
3. The motor structure of an AF guide post and an OIS suspension according to claim 1, wherein: The AF driving component (310) includes an AF driving magnet (311) disposed on the side of the lens module (300) and an AF driving coil (312) disposed inside the frame (200) opposite to the AF driving magnet (311).
4. The motor structure of an AF guiding post and an OIS suspension according to claim 1, characterized in that: The OIS driving component (210) includes an OIS driving magnet (211) disposed on the frame (200) and an OIS driving coil (212) disposed on the housing (100) opposite to the OIS driving magnet (211).
5. The motor structure of an AF guiding post and an OIS suspension according to claim 1, wherein: A second limiting groove (270) cooperating with the AF guiding column (350) is provided on the frame (200); a first limiting groove (351) cooperating with the AF guiding column (350) is provided on the outside of the lens module (300).
6. The AF guiding post and OIS suspension motor structure according to claim 5, characterized in that: Two AF guiding columns (350) are arranged in parallel on the same side; the second limiting groove (270) and the first limiting groove (351) are V-shaped grooves; the AF guiding column (350) is arranged along the optical axis direction; an AF driving coil (312) and a magnet attracting sheet (260) cooperating with the AF driving magnet (311) in the AF driving component (310) are provided on the frame (200).
7. An AF guiding post and OIS suspension motor structure according to claim 5, wherein: A limiting portion (271) cooperating with the lens module (300) is provided at the top of the second limiting groove (270) to prevent the lens module (300) from detaching from the frame (200).
8. The motor structure of an AF guiding column and an OIS suspension according to claim 1, characterized in that: A plurality of limiting blocks (340) extend outward from the side of the lens module (300); a limiting groove (280) cooperating with the limiting blocks (340) is provided on the frame (200) to limit the displacement distance of the lens module (300) along the optical axis direction.
9. The motor structure of an AF guiding column and an OIS suspension according to claim 3, characterized in that: An FPC board (240) is provided on the frame (200); a magnet attracting sheet (260) cooperating with the AF driving magnet (311) is fixed on the FPC board (240); an AF driving coil (312) is connected to the other side of the FPC board (240) opposite to the magnet attracting sheet (260); the FPC board (240) is electrically connected to a part of the upper elastic piece (220) through an embedded metal piece (250) embedded in the frame (200).
10. A motor structure of an AF guiding post and an OIS suspension according to any one of claims 1-9, characterized in that: The material of the AF guide post (350) is metal, plastic or ceramic.