AFOIS guiding structure capable of bearing high load

Abstract

The utility model relates to an AFamp capable of bearing high load. The OIS guiding structure comprises a shell, and a hollow cavity is formed in the shell; the frame is arranged in the hollow cavity and can move in the optical axis direction; an AF driving assembly is arranged between the frame and the shell; the lens module is arranged in the frame and can move in the direction perpendicular to the optical axis under the support of the frame; an OIS driving assembly is arranged between the lens module and the shell; the lens module is connected with the frame through the OIS guide piece; according to the utility model, a single-layer roller OIS and an AF guiding shaft AF guiding structure are used, so that AFamp can be effectively improved; the reliability of an OIS is improved, the damage of falling or vibration to a plastic part is reduced, meanwhile, the single-layer roller structure can effectively improve the bearing performance through linear contact, and the movement requirement and durability of a large-weight lens are met; and meanwhile, the guide effect of the AF guide shaft has a better linear guide effect, so that the direction accuracy of displacement during focusing is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of optical imaging, in particular to an AF&OIS guiding structure capable of bearing high loads. 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 used 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 photography 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 external dimensions and the weight of the moving parts that need to be supported. Coupled with the addition of a variable aperture, the weight that needs to be supported cannot be borne by a general suspension wire suspension structure; a general traditional OIS motor is a structure of a shrapnel + suspension wire, and the lens and the carrier are separated into two parts respectively. Under a large lens or a large load with a variable aperture, it is not sufficient to support the drop impact, which will cause the suspension wire and the shrapnel to break or deform, and the lens module will tilt or warp, resulting in the failure of the focusing and anti-shake functions. Summary of the Utility Model

[0005] In order to solve the above problems of the prior art, the utility model provides an AF&OIS guiding structure capable of bearing high loads.

[0006] To achieve the above object, the main technical solutions adopted by the utility model include:

[0007] An AF&OIS guiding structure capable of bearing high loads, comprising

[0008] a housing, within which a hollow cavity is formed;

[0009] a frame, arranged in the hollow cavity and capable of moving along the optical axis direction; an AF driving component is provided between the frame and the housing;

[0010] The lens module is arranged within the frame and can move perpendicular to the optical axis direction under the support of the frame; an OIS driving component is provided between the lens module and the housing; the lens module is connected to the frame through an OIS guiding member.

[0011] Further, the housing includes an upper cover and a base; the bottom of the upper cover is open and fixedly connected to the base to form a hollow cavity inside; an OIS cover plate fixedly connected to the frame is provided at the top of the lens module.

[0012] Further, the AF driving component includes an AF driving magnet provided on the side of the frame and an AF driving coil located on the inner side of the housing and arranged opposite to the AF driving magnet.

[0013] Further, the OIS driving component includes an OIS driving magnet provided on the side of the lens module and an OIS driving coil located on the inner side of the housing and arranged opposite to the OIS driving magnet; a relief groove is provided on the frame and arranged opposite to the OIS driving magnet.

[0014] Further, the OIS guiding member includes rollers that cooperate with the four corners of the frame; a second limiting groove that cooperates with the rollers is provided inside the frame; the axes of two adjacent rollers arranged in the second limiting groove are perpendicular to each other; a first limiting groove that cooperates with the rollers is provided at the bottom of the lens module.

[0015] Further, the dimension of the second limiting groove along the axis direction of the roller is equivalent to the length of the roller to limit the movement of the ball along its axis direction; the first limiting groove is a V-shaped groove.

[0016] Further, an AF guiding shaft is provided between the frame and the housing; a third limiting groove that cooperates with the AF guiding shaft is provided on the frame; a fourth limiting groove that cooperates with the AF guiding shaft is provided on the inner side of the housing.

[0017] Further, two AF guiding shafts are arranged in parallel; the third limiting groove is a V-shaped groove; the fourth limiting groove is a semi-cylindrical groove; the AF guiding shafts are arranged along the optical axis direction; an AF driving coil and a third magnetic attracting sheet that cooperate with the AF driving magnet are provided on the housing.

[0018] Further, a second magnetic attracting sheet that cooperates with the AF driving magnet is provided on the side of the frame.

[0019] Further, two OIS driving components are provided; a first magnetic attracting patch that cooperates with the OIS driving magnet is provided on the side of the lens module.

[0020] The beneficial effects of the present utility model are as follows: By using a single-layer roller OIS and an AF guiding shaft AF guiding structure, the reliability of AF&OIS can be effectively improved, and the damage to plastic parts caused by dropping or vibration can be reduced. At the same time, the single-layer roller structure can effectively increase the load-bearing performance by using line contact, meeting the movement requirements and durability of large-weight lenses; meanwhile, the guiding function of the AF guiding shaft has a better linear guiding effect, effectively improving the direction accuracy of displacement during focusing. 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 thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0022] Figure 1 is the exploded view of the structure of the present utility model;

[0023] Figure 2 is the cross-sectional view of the present utility model;

[0024] Figure 3 is the schematic diagram of the cooperation between the frame and the OIS guiding part;

[0025] Figure 4 is the schematic diagram of the cooperation between the lens module and the guiding block;

[0026] Description of the Reference Numerals in the Drawings:

[0027] 100, housing; 110, base; 111, fourth limiting groove; 112, third magnet sheet; 120, upper cover; 200, frame; 210, AF driving assembly; 211, AF driving magnet; 212, AF driving coil; 213, second magnet sheet; 220, OIS guiding part; 230, second limiting groove; 240, relief groove; 250, AF guiding shaft; 260, third limiting groove; 300, lens module; 310, OIS driving assembly; 311, OIS driving magnet; 312, OIS driving coil; 313, first magnet sheet; 320, lens holder; 330, lens; 340, OIS cover plate; 350, first limiting groove. Detailed Embodiments

[0028] 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 shall fall within the protection scope 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 to be protected, but merely represents the 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 shall fall within the protection scope of the present utility model.

[0029] 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 construed as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "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.

[0031] An AF&OIS guiding structure capable of bearing high loads, including a housing 100, which generally consists of an upper cover 120 and a base 110 combined; the bottom of the upper 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 upper 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 upper cover 120 can be omitted; in one embodiment, an OIS cover plate 340 fixedly connected to the frame 200 is provided at the top of the lens module 300; the OIS cover plate 340 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 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 space occupation 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;

[0032] A frame 200 capable of moving along the optical axis direction and a lens module 300 moving perpendicular to the optical axis direction are further provided in the hollow cavity; the optical axis direction generally 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 210 is provided between the frame 200 and the housing 100; the frame 200 is moved along the optical axis direction through the AF driving component 210 to achieve focus adjustment, such as Figure 1 moving in the Z-axis direction; the AF driving component 210 generally includes an AF driving magnet 211 provided on the side of the frame 200 and an AF driving coil 212 located inside the housing 100 opposite to the AF driving magnet 211; the AF driving coil 212 controls the AF driving magnet 211 to drive the frame 200 to move along the optical axis; a Hall sensor is usually further provided in the AF driving coil 212, which can accurately sense the moving position of the AF driving magnet 211 to achieve more accurate position control;

[0033] The lens module 300 is arranged above the frame 200 and can move along a direction perpendicular to the optical axis under the support of the frame 200; an OIS driving component 310 is provided between the lens module 300 and the housing 100; the lens module 300 is moved along a direction perpendicular to the optical axis through the OIS driving component 310 to achieve the anti-shake function of the lens module 300. The movement perpendicular to the optical axis direction generally includes, for example Figure 1Movements along the X-axis and Y-axis directions. Therefore, usually two OIS driving components 310 are provided to respectively control the movements in the X-axis and Y-axis directions; the OIS driving component 310 includes an OIS driving magnet 311 arranged on the side of the lens module 300 and an OIS driving coil 312 arranged inside the housing 100 opposite to the OIS driving magnet 311; in an embodiment, a relief groove 240 is provided on the frame 200 opposite to the OIS driving magnet 311. By providing the relief groove 240, the occupancy of the side frame of the frame 200 on the space can be reduced, so that two sides of the frame 200 form a hollow structure, providing an avoidance space for the movement of the lens module 300 in the direction perpendicular to the optical axis, thereby reducing the volume; further, due to the provision of the relief groove 240, the OIS driving magnet 311 and the OIS driving coil 312 are directly opposite to each other without obstruction in the middle, which is beneficial to improving the thrust in the direction perpendicular to the optical axis movement;

[0034] In the structure of the present utility model, the lens module 300 is connected to the frame 200 through an OIS guiding member 220; the lens module 300 performs OIS optical anti-shake under the support of the frame 200, and has stronger stability and greater load capacity compared with the traditional suspension structure using suspension wires, and can effectively avoid problems such as tilting and warping of the lens module 300, greatly improving the durability and stability of the lens module 300; the OIS guiding member 220 is preferably a roller arranged at the four corners of the frame 200; a second limiting groove 230 for cooperating with the roller is provided in the frame 200, and the axes of two adjacent rollers arranged in the second limiting groove 230 are perpendicular to each other. A first limiting groove 350 for cooperating with the roller is provided at the bottom of the lens module 300. Refer to as Figures 3 - 4 shown, the two rollers at the diagonal of the frame 200 are arranged parallel to each other, and the axes of adjacent rollers are perpendicular to each other; in an embodiment, the dimension of the second limiting groove 230 along the axis direction of the roller is equivalent to the length of the roller to limit the movement of the roller along its axis direction. The roller can only roll in the second limiting groove 230. The first limiting groove 350 is a V-shaped groove, and the roller can roll and slide in the first limiting groove 350; the second limiting groove 230 is rectangular. When the roller is arranged in the second limiting groove 230, the length of the roller along its axis direction is equivalent to that of the second limiting groove 230, so that the second limiting groove 230 limits the movement of the roller along the axis direction and can only roll. Through this structural setting, it can be ensured that the lens module 300 can move independently in the X-axis and Y-axis directions respectively without coupling, and at the same time ensure that the contact between the lens module 300 and the roller is a line contact, increasing the contact area, thereby improving the stability and load capacity of the movement of the lens module 300;

[0035] As Figure 2As shown, when the lens module 300 moves in the X-axis direction, the OIS guide 220 on the left rolls in the second limiting groove 230. The OIS guide 220 is further limited by the first limiting groove 350 and can roll in the first limiting groove 350. It should be noted that, at this position, the movement states of the OIS guide 220 in the first limiting groove 350 and the second limiting groove 230 are usually the same. When the roller can roll, it rolls in both the first limiting groove 350 and the second limiting groove 230 simultaneously. When the first limiting groove 350 prevents the roller from rolling, the roller is stationary relative to the first limiting groove 350 but can slide relative to the second limiting groove 230; the OIS guide 220 on the right is limited by the second limiting groove 230 and cannot move, and the first limiting groove 350 slides relative to the OIS guide 220 to achieve movement in the X-axis direction; when the lens module 300 moves in the Y-axis direction, the OIS guide 220 on the left is limited by the second limiting groove 230 and cannot move, but the OIS guide 220 slides relative to the first limiting groove 350, and the OIS guide 220 on the right rolls in the second limiting groove 230 to achieve movement in the Y-axis direction; in an embodiment, the OIS guide 220 can also adopt a structure in which a plurality of ball bearings are arranged side by side to form a ball bearing row structure, and a similar effect can also be achieved;

[0036] In an embodiment, an AF guide shaft 250 is provided between the frame 200 and the housing 100; a third limiting groove 260 cooperating with the AF guide shaft 250 is provided on the frame 200; a fourth limiting groove 111 cooperating with the AF guide shaft 250 is provided in the housing 100; two AF guide shafts 250 are arranged in parallel; the third limiting groove 260 is arranged as a V-shaped groove; the fourth limiting groove 111 is arranged as a semi-cylindrical groove; the AF guide shaft 250 is arranged along the optical axis direction; guiding is carried out by using the AF guide shaft 250, which has better linear directivity; a third magnetic attraction sheet 112 cooperating with the AF drive magnet 211 in the AF drive assembly 210 is provided on the housing 100; through the cooperation of the third magnetic attraction sheet 112 and the AF drive magnet 211, the AF guide shaft 250 can be clamped therein by the adsorption force. The AF drive coil 212 drives the AF drive magnet 211 to move along the optical axis direction. The AF guide shaft 250 is fixed by gluing or embedding in the fourth limiting groove 111. The AF guide shaft 250 has better perpendicularity and is more resistant to impact than traditional ball-type or wire-suspension type;

[0037] In one embodiment, a second magnetic attracting sheet 213 cooperating with the AF driving magnet 211 is provided on the side of the frame 200; the second magnetic attracting sheet 213 can achieve quick installation of the AF driving magnet 211 and increase the thrust force; the second magnetic attracting sheet 213 is preferably connected to the base 110 through an insert injection process; a first magnetic attracting sheet 313 cooperating with the OIS driving magnet is provided on the side of the lens module 300; the first magnetic attracting sheet 313 can achieve quick installation of the OIS driving magnet 311 and increase the thrust force; the first magnetic attracting sheet 313 is preferably connected to the lens holder 320 through an insert injection process.

[0038] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An AF&OIS guide structure capable of withstanding high loads, characterized in that: include A housing (100) having a hollow cavity formed therein; A frame (200) is arranged in the hollow cavity and can move along the optical axis direction; an AF driving component (210) is arranged between the frame (200) and the housing (100); A lens module (300) is arranged in a frame (200) and can move perpendicularly to the optical axis under the support of the frame (200); an OIS driving assembly (310) is arranged between the lens module (300) and the housing (100); and the lens module (300) is connected to the frame (200) via an OIS guide (220).

2. The AF&OIS guide structure capable of bearing high load according to claim 1, characterized in that: The housing (100) comprises an upper cover (120) and a base (110); the bottom opening of the upper cover (120) is fixedly connected to the base (110) to form a hollow cavity inside; and the top of the lens module (300) is provided with an OIS cover plate (340) fixedly connected to the frame (200).

3. The AF&OIS guide structure capable of bearing high load according to claim 1, characterized in that: The AF driving component (210) comprises an AF driving magnet (211) arranged on the side of the frame (200) and an AF driving coil (212) arranged relative to the AF driving magnet (211) and located on the inner side of the housing (100).

4. The AF&OIS guide structure capable of bearing high load according to claim 1, characterized in that: The OIS driving component (310) comprises an OIS driving magnet (311) arranged on the side of the lens module (300) and an OIS driving coil (312) arranged on the inner side of the housing (100) relative to the OIS driving magnet (311); and a clearance groove (240) arranged relative to the OIS driving magnet (311) is provided on the frame (200).

5. The AF&OIS guide structure capable of bearing high load according to claim 1, characterized in that: The OIS guide (220) comprises rollers that cooperate with the four corners of the frame (200); a second limiting groove (230) that cooperates with the roller is provided in the frame (200); the axes of two adjacent rollers provided in the second limiting groove (230) are perpendicular to each other; and a first limiting groove (350) that cooperates with the roller is provided at the bottom of the lens module (300).

6. The AF&OIS guide structure capable of bearing high load according to claim 5, characterized in that: The dimension of the second limiting groove (230) along the roller axis direction is equivalent to the length of the roller so as to limit the movement of the ball along its axis direction; the first limiting groove (350) is a V-shaped groove.

7. The AF&OIS guide structure capable of bearing high load according to claim 1, characterized in that: An AF guide shaft (250) is provided between the frame (200) and the shell (100); a third limiting groove (260) cooperating with the AF guide shaft (250) is provided on the frame (200); and a fourth limiting groove (111) cooperating with the AF guide shaft (250) is provided on the inner side of the shell (100).

8. The AF&OIS guide structure capable of bearing high load according to claim 7, characterized in that: Two AF guide shafts (250) are arranged in parallel; the third limiting groove (260) is a V-shaped groove; the fourth limiting groove (111) is a semi-cylindrical groove; the AF guide shaft (250) is arranged along the optical axis direction; the housing (100) is provided with an AF driving coil (212) and a third magnetic attraction piece (112) that cooperate with the AF driving magnet (211) in the AF driving component (210).

9. The AF&OIS guide structure capable of bearing high load according to claim 3, characterized in that: A second magnetic attraction piece (213) matched with the AF driving magnet (211) is provided on the side of the frame (200).

10. The AF&OIS guide structure capable of bearing high load according to claim 4, characterized in that: Two OIS driving components (310) are provided; and a first magnetic attraction sheet (313) cooperating with the OIS driving magnet (311) is provided on the side of the lens module (300).

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