Variable aperture imaging drive device

Abstract

The utility model provides a variable-aperture camera shooting driving device. The variable-aperture camera shooting driving device comprises a blade group, a fixed carrier, a rotary carrier, a driving assembly and a base, one end of the blade group is fixed with the fixed carrier, the other end of the blade group is fixed with the rotary carrier, the fixed carrier is carried on the rotary carrier, and the rotary carrier is movably arranged in the base; the driving assembly comprises a driving magnet and a rigid-flex board, the driving magnet is fixedly connected with the rotary carrier, and the rigid-flex board is arranged between the fixed carrier and the base and half surrounds the fixed carrier; a driving coil is integrally formed in the rigid-flex board; and the driving coil and the driving magnet are correspondingly arranged. The technical problems that in the prior art, a hollow coil driving structure is adopted for driving the variable aperture camera lens, the hollow coil is assembled to the circuit board after being independently wound and then integrally assembled to the stator, the assembling process is complex, the assembling tolerance is large, and the coil has the risk of reliable falling off can be solved.

Description

Technical Field

[0001] The present application relates to the field of optical element driving technology, and in particular to a variable aperture camera driving device. Background Art

[0002] With the rapid development of the smartphone industry, people's expectations for mobile phone camera imaging are gradually increasing. While pursuing miniaturization of camera modules, major mobile phone solution manufacturers have also placed higher demands on camera module imaging quality. More and more manufacturers are seeking to incorporate variable apertures into mobile phone camera modules. By changing the size of the aperture hole, the intensity of the incident light is adjusted, thereby significantly improving the imaging quality of the camera module.

[0003] Currently, for camera lenses with variable apertures, a hollow coil drive structure is usually used. The hollow coil is wound individually and assembled to a circuit board, and then the whole is assembled to the stator. The assembly process is complex, the assembly tolerance is large, and there is a risk of the coil falling off due to reliability. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a variable aperture camera drive device to solve the problems in the prior art where the variable aperture camera lens drive adopts a hollow coil drive structure, the hollow coil is individually wound and assembled to a circuit board, and then the whole is assembled to the stator, resulting in a complex assembly process, large assembly tolerances, and the risk of coil reliability falling off.

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

[0006] The present application provides a variable aperture camera drive device, comprising: a blade group, a fixed carrier, a rotating carrier, a drive assembly, and a base; one end of the blade group is fixed to the fixed carrier, and the other end of the blade group is fixed to the rotating carrier; the fixed carrier is mounted on the rotating carrier, and the rotating carrier is movably arranged in the base;

[0007] The driving assembly includes a driving magnet and a hard-flex board, wherein the driving magnet is fixedly connected to the rotating carrier, and the hard-flex board is arranged between the fixed carrier and the base, and semi-encloses the fixed carrier; a driving coil is integrally formed in the hard-flex board;

[0008] Wherein, the driving coil is arranged corresponding to the driving magnet.

[0009] In some modified embodiments of the present application, it further includes: a guide member, which is arranged between the rotating carrier and the fixed carrier.

[0010] In some modified implementations of the present application, it further includes: a magnetic sheet, the magnetic sheet being arranged on the outside of the rigid-flexible board;

[0011] Alternatively, the magnetic sheet is disposed on the fixed carrier;

[0012] The magnetic attraction sheet and the driving magnet generate magnetic attraction force to pre-press the guide member.

[0013] In some modified embodiments of the present application, a first fixing column is provided on the fixing carrier, and a fixing groove is provided on the blade group. The first fixing column cooperates with the fixing groove to fix the blade group to the fixing carrier.

[0014] In some modified embodiments of the present application, a second fixing column is provided on the rotating carrier, a sliding groove is provided on the blade group, and the second fixing column cooperates with the sliding groove to rotate the blade group to control the size of the aperture.

[0015] In some modified embodiments of the present application, the fixing groove is arranged on the outside of the sliding groove.

[0016] In some modified implementations of the present application, it further includes: a light shielding sheet, which is arranged between the blade group and the fixed carrier and fixed to the fixed carrier.

[0017] In some modified implementations of the present application, a PIN pin is provided on the rigid-flexible board, and at least one group of the driving coil and the driving magnet are provided in the rigid-flexible board.

[0018] In some modified embodiments of the present application, it also includes: a sensing component, the sensing component includes a sensing magnet and a sensor, the sensing magnet is arranged on the rotating carrier, the sensor is arranged corresponding to the sensing magnet, and the sensor is electrically connected to the soft-hard combination board.

[0019] In some modified implementations of the present application, it further includes: a top cover, which is buckled with the base to form a receiving space.

[0020] Compared with the existing technology, the variable aperture camera drive device provided by the present application has a drive coil integrally formed in a soft and hard combination board, replacing the structure of the circuit board and the hollow coil in the existing technology. The assembly process is simple, and the traditional coil assembly, bonding, welding and other steps are eliminated, which greatly reduces the number of jigs in the coil assembly stage and reduces the automation investment. At the same time, the internal wiring position is stable and the control accuracy is higher. Due to the elimination of the hollow coil structure, the product reliability and impact resistance are higher, and the risks of short circuit and open circuit caused by broken wires, open solder joints and damaged coils in the existing structure are completely avoided, and the product structure is more stable. In addition, there is no need to consider assembly tolerances during the assembly process, and the internal structure is made more compact, saving space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0022] Figure 1 The exploded structure diagram of the variable aperture camera driving device in the first embodiment is schematically shown;

[0023] Figure 2 The structure diagram of the variable aperture camera driving device in the first embodiment is schematically shown;

[0024] Figure 3 The structure diagram of the variable aperture camera driving device without a top cover in the first embodiment is schematically shown;

[0025] Figure 4 The structure diagram of the rigid-flex board in the first embodiment is schematically shown;

[0026] Figure 5 The structure diagram of the first connection condition of the magnetic sheet in the first embodiment is schematically shown;

[0027] Figure 6 The structure diagram of the second connection situation of the magnetic sheet in the first embodiment is schematically shown;

[0028] Figure 7 The structure diagram of the guide member using ball guide in the second embodiment is schematically shown;

[0029] Figure 8 The schematic diagram of the structure of the guide member in the third embodiment is schematically shown using a guide shaft for guidance.

[0030] Description of Figure Numbers:

[0031] 1. Blade assembly; 11. Fixed slot; 12. Slide slot; 2. Fixed carrier; 21. First fixed column; 3. Rotating carrier; 31. Second fixed column; 4. Driving assembly; 41. Driving magnet; 42. Flex-rigid board; 421. Driving coil; 422. PIN pin; 5. Base; 6. Guide; 7. Magnetic sheet; 8. Shading sheet; 9. Sensing assembly; 91. Sensor; 92. Sensing magnet; 10. Top cover. DETAILED DESCRIPTION

[0032] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this application belongs. Example 1

[0034] like Figures 1 to 6 As shown, the first embodiment provides a variable aperture camera drive device, including: a blade group 1, a fixed carrier 2, a rotating carrier 3, a driving assembly 4, a base 5, a magnetic sheet 7, a light shielding sheet 8, a sensor assembly 9 and a top cover 10; the top cover 10 is buckled with the base 5 to form a storage space for other structures; one end of the blade group 1 is fixed to the fixed carrier 2, and the other end of the blade group 1 is fixed to the rotating carrier 3, the fixed carrier 2 is mounted on the rotating carrier 3, the rotating carrier 3 is movably arranged in the base 5, and can rotate relative to the base 5, and the driving assembly 4 is arranged between the rotating carrier 3 and the base 5; the magnetic sheet 7 is used to pre-press the friction limit surface; the light shielding sheet 8 is provided between the blade group 1 and the fixed carrier 2, and is fixed to the fixed carrier 2, and the sensor assembly 9 is used to sense, feedback and adjust the movement of the rotating carrier 3;

[0035] The driving assembly 4 includes a driving magnet 41 and a hard-flex board 42. The driving magnet 41 is fixedly connected to the rotating carrier 3. The hard-flex board 42 is disposed between the fixed carrier 2 and the base 5, and is semi-enclosed by the fixed carrier 2. A driving coil 421 is integrally formed in the hard-flex board 42.

[0036] Among them, the soft and hard combination board 42 is composed of an integrally formed driving coil 421 and a circuit board. A PIN pin 422 is provided on the soft and hard combination board 42 for conducting the internal and external circuits; at least one group of driving coils 421 and driving magnets 41 are provided, and the driving coils 421 and driving magnets 41 are provided correspondingly. The driving magnets 41 and the driving coils 421 generate Lorentz force, driving the rotating carrier 3 to rotate around the optical axis. The assembly process is simple, the internal wiring position is stable, and the control accuracy is higher.

[0037] The rigid-flexible board 42 in the present application is integrally formed with a drive coil 421, which replaces the structure of the circuit board and the hollow coil in the prior art. The assembly process is simple, and the traditional coil assembly, bonding, welding and other steps are eliminated, which greatly reduces the number of jigs in the coil assembly stage and reduces the automation investment. At the same time, the internal wiring position is stable and the control accuracy is higher. Due to the elimination of the hollow coil structure, the product reliability and impact resistance are higher, and the risks of short circuit and open circuit caused by broken wires, open solder joints and damaged coils in the existing structure are completely avoided, and the product structure is more stable. In addition, there is no need to consider assembly tolerances during the assembly process, and the internal structure is made more compact, saving space.

[0038] like Figure 3 As shown, in a specific implementation, a first fixing column 21 is provided on the fixing carrier 2, and a fixing groove 11 is provided on the blade assembly 1. The first fixing column 21 cooperates with the fixing groove 11 to fix the blade assembly 1 to the fixing carrier 2;

[0039] A second fixing post 31 is provided on the rotating carrier 3, and a slide groove 12 is provided on the blade assembly 1. The second fixing post 31 cooperates with the slide groove 12 to rotate the blade assembly 1 to control the size of the aperture;

[0040] The fixing groove 11 is arranged on the outside of the slide groove 12 . Compared with the method in which the fixing groove 11 is arranged on the inside of the slide groove 12 , the relative position of the fixing column and the blade assembly 1 is more stable and the control accuracy is higher.

[0041] like Figure 1 As shown, in a specific implementation, the sensing component 9 includes a sensing magnet 92 and a sensor 91. The sensor 91 is arranged corresponding to the sensing magnet 92. The sensing magnet 92 is arranged on the rotating carrier 3. The sensor 91 is arranged on the soft-hard combination board 42 and is electrically connected to the soft-hard combination board 42 for sensing, feedback and adjusting the movement of the rotating carrier 3.

[0042] It should be noted that, in this embodiment, no guide member is used, and the movable element limiting surface is limited by direct friction between the rotating carrier 3 and the fixed carrier 2 .

[0043] like Figures 5 and 6 As shown, in a specific implementation, the first connection condition of the magnetic sheet 7 is as follows Figure 5As shown, the second connection situation of the magnetic sheet 7 is as follows: Figure 6 As shown, the magnetic sheet 7 is provided on the fixed carrier 2 and generates magnetic attraction with the driving magnet 41 to pre-press the friction limit surface, so that the rotating carrier 3 moves more smoothly. Example 2

[0044] like Figures 1 to 7 As shown, this second embodiment provides a variable aperture camera drive device. Unlike the first embodiment, a guide member 6 is added to guide the rotating carrier 3 during rotation. The guide member 6 is disposed between the rotating carrier 3 and the fixed carrier 2. A magnetic sheet 7 pre-compresses the guide member 6, ensuring smoother movement of the rotating carrier 3. The remaining components of this embodiment are consistent with those of the first embodiment and are not further described here.

[0045] It should be noted that in this embodiment, the guide member 6 is a ball bearing. Figure 7 As shown, rolling guidance is performed. Example 3

[0046] like Figures 1 to 6 、 Figure 8 As shown, the third embodiment provides a variable aperture camera driving device. Different from the second embodiment, the guide member 6 in this embodiment adopts a guide shaft, such as Figure 8 As shown, sliding guidance is performed, and the rest of this embodiment is consistent with the second embodiment and will not be repeated here.

[0047] Working principle:

[0048] The rigid-flex board 42 receives an external electrical signal and 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, thereby driving the blade assembly 1 to open and close, completing the aperture control.

[0049] Control principle:

[0050] The rigid-flex board 42 receives an external electrical signal and transmits the control signal to the sensor 91. When the sensor 91 receives the electrical signal, it senses the movement of the sensing magnet 92 and feeds back the size of the aperture to the external controller, ultimately completing the adjustment of the aperture.

[0051] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A variable aperture camera driving device, characterized in that: include: A blade group, a fixed carrier, a rotating carrier, a drive assembly and a base; one end of the blade group is fixed to the fixed carrier, the other end of the blade group is fixed to the rotating carrier, the fixed carrier is mounted on the rotating carrier, and the rotating carrier is movably arranged in the base; The driving assembly includes a driving magnet and a hard-flex board, wherein the driving magnet is fixedly connected to the rotating carrier, and the hard-flex board is arranged between the fixed carrier and the base, and semi-encloses the fixed carrier; a driving coil is integrally formed in the hard-flex board; Wherein, the driving coil is arranged corresponding to the driving magnet.

2. The variable aperture imaging drive device according to claim 1, wherein: Also includes: A guide member is provided between the rotating carrier and the fixed carrier.

3. The variable aperture camera driving device according to claim 2, wherein: Also includes: A magnetic sheet, the magnetic sheet being arranged on the outside of the rigid-flexible board; Alternatively, the magnetic sheet is disposed on the fixed carrier; The magnetic attraction sheet and the driving magnet generate magnetic attraction force to pre-press the guide member.

4. The variable aperture camera driving device according to claim 1, wherein: The fixing carrier is provided with a first fixing column, the blade group is provided with a fixing groove, and the first fixing column cooperates with the fixing groove to fix the blade group and the fixing carrier.

5. The variable aperture camera driving device according to claim 4, wherein: The rotating carrier is provided with a second fixing column, the blade group is provided with a sliding groove, and the second fixing column cooperates with the sliding groove to be used for the blade group to rotate and control the size of the aperture.

6. The variable aperture camera driving device according to claim 5, wherein: The fixing groove is arranged on the outer side of the sliding groove.

7. The variable aperture camera driving device according to claim 1, wherein: Also includes: A light shielding sheet is provided between the blade assembly and the fixed carrier and is fixed to the fixed carrier.

8. The variable aperture camera driving device according to claim 1, wherein: The rigid-flexible board is provided with a PIN pin, and the driving coil and the driving magnet in the rigid-flexible board are provided with at least one group.

9. The variable aperture camera driving device according to claim 1, wherein: Also includes: The sensing component includes a sensing magnet and a sensor. The sensing magnet is arranged on the rotating carrier. The sensor is arranged corresponding to the sensing magnet, and the sensor is electrically connected to the soft-hard combination board.

10. The variable aperture camera driving device according to claim 1, wherein: Also includes: A top cover is buckled with the base to form a receiving space.

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