Variable aperture imaging drive device

Abstract

The utility model provides a variable aperture camera shooting driving device, and relates to the technical field of optical element driving. The variable aperture camera shooting driving device comprises a top cover, a blade group, a rotating carrier, a driving assembly, an electric connecting piece and a base, the top cover is buckled with the base, the rotating carrier is movably arranged in the base, one end of the blade group is fixed with the base, the other end of the blade group is fixed with the rotating carrier, the driving assembly is arranged between the rotating carrier and the base, an electric connecting piece is arranged on the base, and the driving assembly is electrically connected with the electric connecting piece; the driving assembly comprises driving magnets and a driving coil, the driving magnets are arranged on the rotating carrier, the driving coil is arranged on the base, the driving coil is of a hollow structure, and the driving magnets are placed on the two sides of a hollow area of the hollow structure. According to the technical scheme, the technical problems that in the prior art, due to the fact that a driving magnet and a driving coil are oppositely arranged, part of the driving coil cannot provide electromagnetic force, the electromagnetic force is too small, and the driving assembly assembling process is complex can be solved.

Description

Technical Field

[0001] This application relates to the technical field of optical element driving, and particularly relates to a variable aperture camera driving device. Background Art

[0002] With the development of electronic technology, nowadays, users of electronic devices (such as smart phones or digital cameras) have higher and higher requirements for the photographing or video recording function, and the demand for micro camera modules is also continuously increasing. For the camera aperture, in places with strong light, the camera can obtain a deeper depth of field and a sharper picture by reducing the aperture, while in places with insufficient light, increasing the aperture can increase the amount of incident light, and thus a cleaner picture with higher exposure and lower noise can be obtained.

[0003] Currently, for the driving of a variable aperture camera lens, generally, a driving magnet and a driving coil are placed opposite to each other, with the driving magnet placed on one side and the driving coil placed on the other side. This placement method will cause some driving coils not to provide electromagnetic force, resulting in too small electromagnetic force. At the same time, the assembly process of the driving components in this placement method is relatively complex. Summary of the Utility Model

[0004] The purpose of the embodiments of this application is to provide a variable aperture camera driving device to solve the problems in the prior art that when a driving magnet and a driving coil are placed opposite to each other, some driving coils cannot provide electromagnetic force, resulting in too small electromagnetic force, and the assembly process of the driving components is relatively complex.

[0005] To solve the above technical problems, the embodiments of this application provide the following technical solutions:

[0006] This application provides a variable aperture camera driving device, including: a top cover, a blade group, a rotating carrier, a driving component, an electrical connector, and a base; the top cover and the base are snap-fitted, the rotating carrier is movably disposed within the base, one end of the blade group is fixed to the base, and the other end is fixed to the rotating carrier. The driving component is disposed between the rotating carrier and the base, and an electrical connector is provided on the base. The driving component is electrically connected to the electrical connector;

[0007] The driving component includes a driving magnet and a driving coil. The driving magnet is disposed on the rotating carrier, the driving coil is disposed on the base, the driving coil has a hollow structure, and the driving magnet is placed on both sides of the hollow region of the hollow structure.

[0008] In some alternative embodiments of this application, the hollow structure is a hollow coil, and the driving magnets are respectively placed on both sides of the hollow region of the hollow coil;

[0009] Among them, the cross-section of the hollow region of the hollow coil is square or circular.

[0010] In some modified embodiments of the present application, the hollow structure includes a winding post and a coil. The coil is wound around the outer side of the winding post, and the driving magnets are respectively placed on both sides of the hollow region of the winding post.

[0011] Among them, the cross-section of the hollow region of the winding post is square or circular.

[0012] In some modified embodiments of the present application, it further includes: a light-shielding sheet. The light-shielding sheet is arranged between the blade group and the base. The base is provided with a first fixing post, and the edge of the light-shielding sheet is provided with a first fixing groove that cooperates with the first fixing post to fix the light-shielding sheet to the base.

[0013] In some modified embodiments of the present application, the blade group is provided with a second fixing groove that cooperates with the first fixing post to fix the blade group to the base; the rotating carrier is provided with a second fixing post, and the blade group is provided with a sliding groove that cooperates with the second fixing post to control the aperture size by rotating the blade group.

[0014] In some modified embodiments of the present application, the electrical connector uses a metal reinforcing member. The base is provided with a metal reinforcing member, and the metal reinforcing member is electrically connected to the driving coil.

[0015] In some modified embodiments of the present application, the electrical connector uses a circuit board. The circuit board is arranged to surround the base, and the circuit board is electrically connected to the driving coil.

[0016] In some modified embodiments of the present application, it further includes: a closed-loop assembly. The closed-loop assembly includes a sensing magnet and a sensor. The sensing magnet is arranged on the rotating carrier, the sensor is correspondingly arranged with the sensing magnet, and the sensor is electrically connected to the electrical connector.

[0017] In some modified embodiments of the present application, it further includes: a guiding member. The guiding member is arranged between the rotating carrier and the base for guiding the rotating carrier during rotation. The guiding member is a ball or a guide shaft.

[0018] In some modified embodiments of the present application, the driving magnet is a strip magnet or a tile magnet.

[0019] Compared with the prior art, in the variable aperture camera driving device provided by the present application, the driving coil adopts a hollow structure, driving magnets are placed on both sides of the hollow area of the hollow structure, the magnet magnetization surface is smaller than the hollow area of the driving coil, the driving magnets are magnetized oppositely, and the magnetic field vertically penetrates through the driving coil from four surfaces respectively, so that electromagnetic forces are provided on all four sides of the driving coil, greatly increasing the electromagnetic force;

[0020] The assembly process is simpler than that of the driving magnet and the driving coil placed oppositely in the prior art. Description of the Drawings

[0021] By reading the following detailed description with reference to the drawings, the above and other objects, features and advantages of the exemplary embodiments of the present application will become easily understandable. In the drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0022] Figure 1 Schematically shows an exploded view of the variable aperture camera driving device in the first embodiment;

[0023] Figure 2 Schematically shows a structural view of the variable aperture camera driving device in the first embodiment;

[0024] Figure 3 Schematically shows a structural view of the connection between the rotating carrier and the driving magnet and the sensing magnet in the first embodiment;

[0025] Figure 4 Schematically shows an exploded view of the connection between the driving component and the rotating carrier and the base in the first embodiment;

[0026] Figure 5 Schematically shows a structural view of the connection between the strip magnet and the driving coil in the first embodiment;

[0027] Figure 6 Schematically shows a structural view of the connection between the tile magnet and the driving coil in the first embodiment;

[0028] Figure 7 Schematically shows a structural view of one case of the driving coil in the first embodiment.

[0029] Description of the Reference Numerals in the Drawings:

[0030] 1. Top cover; 2. Blade group; 21. Second fixing groove; 22. Sliding groove; 3. Rotating carrier; 31. Second fixing post; 4. Driving component; 41. Driving magnet; 42. Driving coil; 421. Wire winding post; 422. Coil; 5. Base; 51. First fixing post; 6. Electrical connector; 7. Light shielding sheet; 71. First fixing groove; 8. Closed-loop component; 81. Sensing magnet; 82. Sensor. Detailed implementation mode

[0031] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0032] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which this application belongs. Embodiment 1

[0033] As Figures 1 to 7 shown, Embodiment 1 of the present invention provides a variable aperture camera driving device, including: a top cover 1, a blade group 2, a rotating carrier 3, a driving component 4, a base 5, an electrical connector 6, a light shielding sheet 7 and a closed-loop component 8; the top cover 1 and the base 5 are snap-fitted to form a receiving space for accommodating other components, the rotating carrier 3 is movably disposed in the base 5, one end of the blade group 2 is fixed to the base 5, the other end is fixed to the rotating carrier 3, a light shielding sheet 7 is provided between the blade group 2 and the base 5, the light shielding sheet 7 is fixed to the base 5, the driving component 4 is disposed between the rotating carrier 3 and the base 5, the base 5 is provided with an electrical connector 6, the driving component 4 is electrically connected to the electrical connector 6, and the driving component 4 drives the rotating carrier 3 to move, driving the blade group 2 to rotate to control the size of the aperture;

[0034] The driving component 4 includes two groups of driving magnets 41 and two groups of driving coils 42. The driving magnets 41 are disposed on the rotating carrier 3. A driving magnet fixing groove is provided on the surface of the rotating carrier 3 close to the base 5, and the driving magnets 41 are placed in the driving magnet fixing groove; the driving coils 42 are disposed on the base 5 and are fixedly connected to the base 5. The driving coils 42 adopt a hollow structure, and the driving magnets 41 are placed on both sides of the hollow region of the hollow structure; wherein, the number of each group of driving magnets 41 and driving coils 42 is preferably two, and the driving magnets 41 are preferably long strip magnets or tile magnets. The placement method of the long strip magnets and the driving coils 42 is as Figure 5 shown, and the placement method of the tile magnets and the driving coils 42 is as Figure 6 shown.

[0035] The magnetizing surface of the driving magnet 41 is smaller than the hollow area of the driving coil 42. The magnetic field perpendicularly penetrates through the driving coil 42 from four surfaces respectively, enabling all four sides of the driving coil 42 to provide electromagnetic force, greatly increasing the electromagnetic force, and solving the problems in the prior art where the driving magnet and the driving coil are placed opposite to each other, resulting in some driving coils being unable to provide electromagnetic force, too small electromagnetic force, and relatively complex assembly process of the driving component.

[0036] As Figure 5 , Figure 6 shown, in a specific implementation, the hollow structure of the driving coil 42 can be a hollow coil, preferably a square hollow coil or a circular hollow coil. Driving magnets 41 are respectively placed on both sides of the hollow area of the hollow coil.

[0037] As Figure 7 shown, the hollow structure of the driving coil 42 can also be in the form of winding around an injection-molded part, including a winding post 421 and a coil 422. The coil 422 is wound around the outside of the winding post 421. Driving magnets 41 are respectively placed on both sides of the hollow area of the winding post 421.

[0038] As Figure 1 , Figure 4 shown, in a specific implementation, a first fixing post 51 is provided on the base 5, a first fixing groove 71 matching the first fixing post 51 is provided on the light-shielding sheet 7, so that the light-shielding sheet 7 is fixed to the base 5; a second fixing groove 21 matching the first fixing post 51 is provided on the blade group 2, so that the blade group 2 is fixed to the base 5; a second fixing post 31 is provided on the rotating carrier 3, and a sliding groove 22 matching the second fixing post 31 is provided on the blade group 2, so that the blade group 2 controls the size of the aperture by rotation.

[0039] As Figure 1 shown, in a specific implementation, the electrical connector 6 can adopt a metal reinforcement member. A metal reinforcement member is provided inside the base 5, and the metal reinforcement member is electrically connected to the driving coil 42.

[0040] As Figure 1 , Figure 3 shown, in a specific implementation, the closed-loop assembly 8 includes a sensing magnet 81 and a sensor 82. The sensing magnet 81 is provided on the rotating carrier 3. A sensing magnet fixing groove is provided on the side of the rotating carrier 3 close to the base. The sensing magnet 81 is placed in the sensing magnet fixing groove. The sensor 82 is arranged corresponding to the sensing magnet 81, and the sensor 82 is electrically connected to the electrical connector 6, and is used to sense, feedback and adjust the movement condition of the rotating carrier 3.

[0041] In this embodiment, no guiding member is adopted. The rotor limiting surface directly uses the friction between the rotating carrier 3 and the base 5 for limiting. The figure shows the situation of friction limiting between plastic parts. Embodiment Two

[0042] Embodiment 2 provides a variable aperture camera driving device, which is different from Embodiment 1 in that the electrical connector 6 is replaced by a circuit board. The circuit board is arranged to surround the base 5, and the circuit board is electrically connected to the driving coil 42. Embodiment 3

[0043] Embodiment 3 provides a variable aperture camera driving device, which is different from Embodiment 1 in that a guiding member (not shown in the figure) is added. The guiding member is arranged between the rotating carrier 3 and the base 5 and is used for guiding the rotating carrier 3 during rotation. The guiding member is a ball or a guide shaft, and the guiding member serves as a mover limit between the rotating carrier 3 and the base 5. Embodiment 4

[0044] Embodiment 4 provides a variable aperture camera driving device, which is different from Embodiment 2 in that a guiding member (not shown in the figure) is added. The guiding member is arranged between the rotating carrier 3 and the base 5 and is used for guiding the rotating carrier 3 during rotation. The guiding member is a ball or a guide shaft, and the guiding member serves as a mover limit between the rotating carrier 3 and the base 5.

[0045] Working principle:

[0046] The electrical connector 6 receives an external electrical signal and transmits the electrical signal to the driving coil 42. The driving coil 42 interacts with the magnetic field generated by the driving magnet 41 to form a Lorentz force, which drives the rotating carrier 3 to rotate around the optical axis, and then drives the opening and closing of the blade group 2 to complete the control of the aperture.

[0047] The electrical connector 6 receives an external electrical signal and transmits the control signal to the sensor 82. When the sensor 82 receives the electrical signal, it will sense the movement of the sensing magnet 81 and feedback the size of the aperture to the external controller, and finally complete the adjustment of the aperture.

[0048] The above is only the specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A variable aperture imaging driving device, characterized in that, Comprising: A top cover, a blade group, a rotating carrier, a driving component, an electrical connector and a base; the top cover and the base are snap-fitted, the rotating carrier is movably disposed within the base, one end of the blade group is fixed to the base, the other end is fixed to the rotating carrier, the driving component is disposed between the rotating carrier and the base, the base is provided with an electrical connector, and the driving component is electrically connected to the electrical connector; The driving component includes a driving magnet and a driving coil, the driving magnet is disposed on the rotating carrier, the driving coil is disposed on the base, the driving coil has a hollow structure, and the driving magnet is placed on both sides of the hollow region of the hollow structure.

2. The variable aperture imaging driving device according to claim 1, wherein The hollow structure is a hollow coil, and the driving magnets are respectively placed on both sides of the hollow region of the hollow coil; Wherein, the cross-section of the hollow region of the hollow coil is square or circular.

3. The variable aperture imaging driving device according to claim 1, wherein The hollow structure includes a winding post and a coil, the coil is wound around the outside of the winding post, and the driving magnets are respectively placed on both sides of the hollow region of the winding post; Wherein, the cross-section of the hollow region of the winding post is square or circular.

4. The variable aperture imaging driving device according to claim 1, wherein, Further comprising: A light-shielding sheet, the light-shielding sheet is disposed between the blade group and the base, the base is provided with a first fixing post, and the edge of the light-shielding sheet is provided with a first fixing groove that cooperates with the first fixing post to fix the light-shielding sheet to the base.

5. The variable aperture imaging driving device according to claim 4, wherein The blade group is provided with a second fixing groove that cooperates with the first fixing post to fix the blade group to the base; the rotating carrier is provided with a second fixing post, and the blade group is provided with a sliding groove that cooperates with the second fixing post for controlling the size of the aperture when the blade group rotates.

6. The variable aperture imaging driving device according to claim 1, wherein The electrical connector uses a metal reinforcing member, a metal reinforcing member is disposed within the base, and the metal reinforcing member is electrically connected to the driving coil.

7. The variable aperture imaging driving device according to claim 1, wherein The electrical connector uses a circuit board, the circuit board surrounds the base, and the circuit board is electrically connected to the driving coil.

8. The variable aperture imaging driving device according to claim 1, wherein, Further comprising: A closed-loop component, the closed-loop component includes a sensing magnet and a sensor, the sensing magnet is disposed on the rotating carrier, the sensor is correspondingly disposed with the sensing magnet, and the sensor is electrically connected to the electrical connector.

9. The variable aperture imaging driving device according to claim 1, wherein, Further comprising: A guiding member, the guiding member is disposed between the rotating carrier and the base for guiding the rotating carrier during rotation, and the guiding member is a ball or a guide shaft.

10. The variable aperture imaging driving device according to claim 1, wherein, The driving magnet is a strip magnet or a tile magnet.

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