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 an upper cover, a limiting piece, a blade assembly, a driving assembly, a carrier, a base and an electric connecting piece, the upper cover and the limiting piece are fixedly arranged on the base in a buckled mode, the blade assembly is arranged between the limiting piece and the carrier, the carrier is carried on the base, a driving assembly is arranged between the 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. And the pre-pressing assembly is used for pre-pressing the blade assembly and is arranged between the limiting piece and the carrier. According to the technical scheme, the technical problems that in the prior art, a blade limiting mode generally only adopts a positioning column mode, no pre-tightening force exists, and precision, repeatability and the like become poor due to fit clearance 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 functions, and the demand for micro camera modules is also continuously increasing. For the camera aperture, in a place with strong light, the camera can obtain a deeper depth of field and a sharper picture by reducing the aperture, while in a place with insufficient light, by increasing the aperture, the amount of incident light can be increased, and thus a cleaner picture with higher exposure and lower noise can be obtained.

[0003] However, in the prior art, the blade limiting method usually only adopts the positioning post method, without pre-tightening force, and the fitting clearance will cause problems such as poor accuracy and repeatability. Utility Model Content

[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 the blade limiting method usually only adopts the positioning post method, without pre-tightening force, and the fitting clearance will cause problems such as poor accuracy and repeatability.

[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: an upper cover, a limiting piece, a blade assembly, a driving assembly, a carrier, a base, and an electrical connector; the upper cover and the limiting piece are fixedly buckled on the base, the blade assembly is arranged between the limiting piece and the carrier, the carrier is mounted on the base, a driving assembly is arranged between the carrier and the base, an electrical connector is arranged on the base, and the driving assembly is electrically connected to the electrical connector;

[0007] It further includes: a preloading assembly for preloading the blade assembly, and the preloading assembly is arranged between the limiting piece and the carrier.

[0008] In some alternative embodiments of this application, the preloading assembly includes a preloading magnet, the preloading magnet is arranged below the blade assembly, and the preloading magnet attracts a metal part in the limiting piece to provide a preloading force for the blade assembly.

[0009] In some alternative embodiments of this application, the preloading assembly includes a preloading magnet and a first magnetic attracting piece, the preloading magnet is arranged below the blade assembly, the first magnetic attracting piece is arranged above the blade assembly, and the preloading magnet attracts the first magnetic attracting piece to provide a preloading force for the blade assembly.

[0010] In some alternative embodiments of the present application, the driving assembly includes a driving magnet and a driving coil. The driving magnet is disposed on the side wall of the carrier, and the driving coil is disposed on the base. The driving coil is arranged corresponding to the driving magnet and is electrically connected to the electrical connector.

[0011] In some alternative embodiments of the present application, the driving magnet is arranged in a Halbach array and fixed by welding.

[0012] In some alternative embodiments of the present application, a second magnetic attraction sheet is provided between the driving magnet and the carrier.

[0013] In some alternative embodiments of the present application, it further includes a light-shielding assembly. The light-shielding assembly includes a first light-shielding sheet and a second light-shielding sheet. The first light-shielding sheet is fixed to the carrier and the base, and the second light-shielding sheet is fixed to the base.

[0014] In some alternative embodiments of the present application, it further includes a support member. The support member is disposed between the carrier and the base.

[0015] In some alternative embodiments of the present application, support member fixing grooves for fixing the support member are provided on both the base and the carrier.

[0016] In some alternative embodiments of the present application, it further includes a closed-loop controller. The closed-loop controller is disposed in a closed-loop controller fixing groove on the base and is electrically connected to the electrical connector.

[0017] Compared with the prior art, the variable aperture camera driving device provided by the present application adds a preloading assembly for preloading the blade assembly between the limiting piece and the carrier, provides a lateral pre-tightening force to the blade assembly, eliminates the influence of the fitting clearance on the control, improves the performance yield, and at the same time greatly improves the control accuracy and ensures the consistency of the performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood. In the drawings, several embodiments of the present application are shown by way of illustration and not limitation, and like or corresponding reference numerals indicate like or corresponding parts, wherein:

[0019] Figure 1 Schematically shows an exploded view of the variable aperture camera driving device in this embodiment;

[0020] Figure 2 Schematically shows a structural view of the variable aperture camera driving device in this embodiment;

[0021] Figure 3 Schematically shows the structural schematic diagram of the connection between the base and the second magnetic attraction sheet in this embodiment;

[0022] Figure 4 Schematically shows the exploded schematic diagram of the connection between the base and the electrical connector in this embodiment;

[0023] Figure 5 Schematically shows the structural schematic diagram of the driving magnet in this embodiment;

[0024] Figure 6 Schematically shows the structural schematic diagram of the connection between the driving magnet and the carrier in this embodiment;

[0025] Figure 7 Schematically shows the structural schematic diagram of the connection between the driving coil and the base in this embodiment;

[0026] Figure 8 Schematically shows the structural schematic diagram of the limiting piece in this embodiment;

[0027] Figure 9 Schematically shows the structural schematic diagram of the connection between the preloading component and the blade component in the first embodiment of this example;

[0028] Figure 10 Schematically shows the structural diagram of the connection between the preloading component and the blade component in the second embodiment of this example.

[0029] Explanation of the reference numerals in the drawings:

[0030] 1. Top cover; 2. Limiting piece; 3. Blade component; 4. Driving component; 41. Driving magnet; 42. Driving coil; 5. Carrier; 6. Base; 61. Support piece fixing groove; 62. Closed-loop controller fixing groove; 7. Electrical connector; 8. Preloading component; 81. Preloading magnet; 82. First magnetic attraction sheet; 9. Light-shielding component; 91. First light-shielding sheet; 92. Second light-shielding sheet; 10. Support piece; 11. Closed-loop controller; 12. Magnetic attraction sheet. Detailed implementation manners

[0031] The following will describe the exemplary embodiments of the present disclosure in more detail with reference to the 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 completely 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 meaning understood by those skilled in the art to which this application belongs. First embodiment

[0033] As Figures 1 to 9 shown, Embodiment 1 provides a variable aperture camera driving device, including: an upper cover 1, a limiting piece 2, a blade assembly 3, a driving assembly 4, a carrier 5, a base 6, an electrical connector 7, a light-shielding assembly 9, a support piece 10, and a closed-loop controller 11; the upper cover 1 and the limiting piece 2 are fixedly fastened to the base 6 to form an accommodation space for accommodating other components; the blade assembly 3 is arranged between the limiting piece 2 and the carrier 5, the carrier 5 is mounted on the base 6, a driving assembly 4 is arranged between the carrier 5 and the base 6, an electrical connector 7 is arranged on the base 6, and the driving assembly 4 is electrically connected to the electrical connector 7; the light-shielding assembly 9 is arranged between the limiting piece 2 and the carrier 5, the support piece 10 is arranged between the carrier 5 and the base 6, and the closed-loop controller 2 is electrically connected to the electrical connector 7; the carrier 5 moves by means of the support piece 10 under the drive of the driving assembly 4, thereby driving the opening and closing of the blade assembly 3 to complete the control of the aperture;

[0034] It further includes: a preloading assembly 8 for preloading the blade assembly 3, and the preloading assembly 8 is arranged between the limiting piece 2 and the carrier 5;

[0035] wherein, the electrical connector 7 can be a circuit board or a metal reinforcing member; the support piece 10 can be a support and guiding structure such as a ball or a roller.

[0036] On the premise that this embodiment uses the positioning post method for blade limiting, a preloading assembly 8 is added between the limiting piece 2 and the carrier 5 to provide a lateral pre-tightening force for the blade assembly 3, eliminate the influence of the fitting clearance on the control, improve the performance yield, and at the same time greatly improve the control accuracy and ensure the performance consistency, so as to solve the problems in the prior art that the blade limiting method usually only uses the positioning post method, without pre-tightening force, and the fitting clearance will cause deterioration of accuracy, repeatability, etc.

[0037] As Figure 1 、 Figure 9 shown, in a specific implementation, the preloading assembly 8 includes a preloading magnet 81, the preloading magnet 81 is arranged below the blade assembly 3, and the preloading magnet 81 attracts the metal part in the limiting piece 2 to provide a pre-pressure for the blade assembly 3.

[0038] Specifically, setting a metal part in the limiting piece 2 is equivalent to adding a magnetic conductive sheet structure above the blade assembly 3 and adding a preloading magnet 81 as a magnet structure below the blade assembly 3 to provide a lateral pre-tightening force for the blade assembly 3, eliminate the influence of the fitting clearance on the control, improve the performance yield, and at the same time greatly improve the control accuracy and ensure the performance consistency.

[0039] As Figure 1 、 Figure 5 、 Figure 6 、 Figure 7As shown, in a specific implementation, the driving component 4 includes two sets of driving magnets 41 and two sets of driving coils 42. The two sets of driving magnets 41 are respectively arranged on the side walls of the carrier 5, and the two sets of driving coils 42 are arranged on the base 6. The driving coils 42 are arranged corresponding to the driving magnets 41 and are electrically connected to the electrical connector 7. Among them, the driving magnets 41 are arranged in a Halbach array, which is a prior art and will not be elaborated here. The magnet groups are preferably connected by laser welding to improve the bonding force.

[0040] As Figure 1 , Figure 4 shown, in a specific implementation, a second magnetic attraction sheet 12 is provided between the driving magnet 41 and the carrier 5 to enhance the magnetic field.

[0041] As Figure 1 shown, in a specific implementation, the light-shielding component 9 includes a first light-shielding sheet 91 and a second light-shielding sheet 92. The first light-shielding sheet 91 is fixed to the carrier 5 and the base 6 through positioning posts, and the second light-shielding sheet 92 is fixed to the base 6 through positioning posts.

[0042] As Figure 3 shown, in a specific implementation, support member fixing grooves 61 for fixing the support member 10 are provided on both the base 5 and the carrier 6.

[0043] As Figure 3 shown, in a specific implementation, the closed-loop controller 11 is arranged in the closed-loop controller fixing groove 62 on the base 6.

[0044] Embodiment 2

[0045] As Figures 1 to 8 , Figure 10 shown, the second embodiment provides a variable aperture camera driving device, which is different from the first embodiment in that the preloading component 8 includes a preloading magnet 81 and a first magnetic attraction sheet 82. The preloading magnet 81 is arranged below the blade component 3, and the first magnetic attraction sheet 82 is arranged above the blade component 3. The preloading magnet 81 and the first magnetic attraction sheet 82 attract each other to provide a preloading force for the blade component 3.

[0046] A preloading magnet 81 is added above the blade component 3 as a magnetic conduction sheet structure, and a first magnetic attraction sheet 82 is added below the blade component 3 as a magnet structure to provide a lateral pre-tightening force for the blade component 3, eliminate the influence of the fitting clearance on the control, improve the performance yield, and at the same time greatly improve the control accuracy and ensure the consistency of the performance.

[0047] Working principle:

[0048] The electrical connector 7 accesses 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, driving the carrier 5 to rotate around the optical axis as a rotation axis, and then driving the opening and closing of the blade component 3 to complete the control of the aperture.

[0049] The electrical connector 7 accesses an external electrical signal and transmits a control signal to the sensor in the closed-loop controller 11. When the sensor receives the electrical signal, it senses the movement of the sensing magnet in the closed-loop controller 11 and feeds back the size condition of the aperture to the external controller, finally completing the adjustment of the aperture.

[0050] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claimed rights.

Claims

1. A variable aperture imaging driving device, characterized in that, Comprising: An upper cover, a limiting piece, a blade assembly, a driving assembly, a carrier, a base and an electrical connector; The upper cover and the limiting piece are fixedly buckled on the base. The blade assembly is arranged between the limiting piece and the carrier. The carrier is mounted on the base. A driving assembly is arranged between the carrier and the base. An electrical connector is arranged on the base. The driving assembly is electrically connected to the electrical connector; Further comprising: a preloading assembly for preloading the blade assembly, and the preloading assembly is arranged between the limiting piece and the carrier.

2. The variable aperture imaging driving device according to claim 1, wherein, The preloading assembly includes a preloading magnet, the preloading magnet is arranged below the blade assembly, and the preloading magnet attracts the metal part in the limiting piece to provide a preloading force for the blade assembly.

3. The variable aperture imaging driving device according to claim 1, wherein The preloading assembly includes a preloading magnet and a first magnetic attracting piece. The preloading magnet is arranged below the blade assembly, and the first magnetic attracting piece is arranged above the blade assembly. The preloading magnet attracts the first magnetic attracting piece to provide a preloading force for the blade assembly.

4. The variable aperture imaging driving device according to claim 1, wherein The driving assembly includes a driving magnet and a driving coil. The driving magnet is arranged on the side wall of the carrier, the driving coil is arranged on the base, the driving coil is arranged corresponding to the driving magnet and is electrically connected to the electrical connector.

5. The variable aperture imaging driving device according to claim 4, wherein The driving magnets are arranged in a Halbach array and fixed by welding.

6. The variable aperture imaging drive device according to claim 4, wherein, A second magnetic attracting piece is arranged between the driving magnet and the carrier.

7. The variable aperture imaging driving device according to claim 1, wherein Further comprising: A light-shielding assembly, the light-shielding assembly includes a first light-shielding piece and a second light-shielding piece. The first light-shielding piece is fixed to the carrier and the base, and the second light-shielding piece is fixed to the base.

8. The variable aperture imaging driving device according to claim 1, wherein Further comprising: A support member, and the support member is arranged between the carrier and the base.

9. The variable aperture imaging driving device according to claim 8, wherein, Support member fixing grooves for fixing the support member are provided on both the base and the carrier.

10. The variable aperture imaging drive device according to claim 1, wherein Further comprising: A closed-loop controller, and the closed-loop controller is arranged in a closed-loop controller fixing groove on the base and is electrically connected to the electrical connector.

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