Mute high-precision aperture control structure

Abstract

The utility model discloses a mute high-precision aperture control structure, which comprises a fixed seat, a turntable, a blade driving lever group and a driving motor, the driving motor is fixed on the fixed seat and is meshed with teeth of the rotating disc arranged on the fixed seat, the rotating disc drives the blade driving lever group to rotate and actuate, and the inner side edge is combined with other blades to form an adjustable light through hole; by optimizing the structure of the blade deflector rod group, the deflector rods and the blades are integrated; the prepared blade deflector rod is free of salient points, more blade assembly space is saved, the integration reliability is better, meanwhile, the blade surface is smoother, noise generated during operation is reduced, operation is more silent, the precision is higher, and the system operation stability is improved. On the other hand, standardized production of the blade driving lever can be promoted, and the production efficiency is improved; a PI positioning control device is arranged to provide accurate real-time feedback, so that effective and high-precision control of the aperture can be achieved; therefore, the technical effects of silence and high-precision control are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aperture devices, in particular to a silent and high-precision aperture control structure. Background Art

[0002] As a crucial component of camera modules like mirrorless cameras, the characteristics of a variable aperture can influence the module's functionality. The aperture assembly is a crucial component of a camera module, adjusting the aperture's area to adjust the amount of light entering the camera. The blades and lever within the aperture assembly are key components, controlling the amount of light entering the camera by adjusting the aperture size. Traditional aperture assemblies typically utilize a multi-blade structure, each blade controlled by an independent lever. When the aperture opening is at its maximum diameter, the blades retract within the width of the housing.

[0003] Currently, major manufacturers are pursuing miniaturization of camera modules while placing more stringent demands on their imaging quality. However, existing variable aperture irises are generally large in size and require a drive mechanism to move the iris, making lenses with variable aperture functions bulky and unfavorable for miniaturization of camera modules. 1. The complex multi-blade structure, with each blade requiring a separate lever for control, makes the assembly process cumbersome and prone to assembly errors. This also limits accuracy, preventing precise adjustment of the iris and impacting product quality. 2. The multi-blade structure is noisy, generating significant noise during use, impacting the user experience.

[0004] Therefore, further research and development is needed to solve the problems existing in the existing technology. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned problems, the purpose of the present invention is to provide a silent and high-precision aperture control structure.

[0006] One of the purposes of this utility model is achieved by the following technical solution:

[0007] ] A silent, high-precision aperture control structure, comprising a fixed seat and a turntable arranged on the fixed seat, a blade lever group, and a driving assembly; a rotating hole is provided in the middle of the fixed seat; the turntable can be rotatably arranged on the fixed seat and connected to the rotating hole; the blade lever group includes a plurality of blades movably arranged on the upper surface of the turntable, and a lever is integrally formed at one end of each of the blades; a long strip hole is radially provided on the turntable for the lever to move; the driving assembly includes a driving motor installed on a side of the fixed seat away from the turntable; the turntable is provided with teeth distributed along the outer peripheral side wall of the turntable, the output shaft of the driving motor passes through the fixed seat and is meshed with the teeth, the driving motor drives the turntable to rotate, the lever moves along the long strip hole, and drives the blades to rotate, so that the plurality of blades are combined to form an adjustable light-through hole.

[0008] Furthermore, the upper surface of the fixing seat is provided with a plurality of limiting posts distributed along the circumference of the turntable, and the blade is provided with limiting holes corresponding to the limiting posts; the limiting posts are passed through the limiting holes to fix the blade.

[0009] Furthermore, the upper surface of the fixing seat is recessed downward and is provided with an installation groove adapted to the turntable, the side walls of the installation groove are provided with a plurality of limiting protrusions extending radially toward the turntable, and the outer periphery of the turntable is provided with limiting grooves extending along its circumference; when the turntable rotates, the limiting protrusions can move along the limiting grooves.

[0010] Furthermore, a notch is provided at one end of the elongated hole toward the center of the turntable, and the notch gradually narrows toward the center of the turntable.

[0011] Furthermore, an end limiting piece is provided at the end of the limiting groove for limiting the moving stroke of the limiting protrusion.

[0012] Furthermore, the driving motor is mounted on the fixing seat via a motor mounting plate; the fixing seat is penetrated by a through hole, the output shaft of the driving motor passes through the through hole, and is driven by meshing with the teeth of the turntable via a transmission gear.

[0013] Furthermore, an arc-shaped limiting block extending toward the fixing seat is provided on the outer side of the turntable, and an arc-shaped through groove is provided through the fixing seat for allowing the arc-shaped limiting block to move back and forth.

[0014] Furthermore, a fixing cover is provided above the blade lever group; a plurality of connecting parts are distributed at intervals along the circumference of the fixing seat, and a plurality of elastic clips connected to the connecting parts are provided on the outer periphery of the fixing cover, and the elastic clips are provided with buckle grooves adapted to the connecting parts, and the elastic clips are fixed to the connecting parts through the buckle grooves.

[0015] Furthermore, one end of the connecting member close to the fixing cover is provided with a guiding inclined surface inclined toward the fixing seat.

[0016] Furthermore, the driving component includes a circuit board electrically connected to the driving motor, and the circuit board is one of an FPC circuit board and an SMT circuit board.

[0017] Furthermore, a PI positioning control device for sensing the arc-shaped limit block is provided at the bottom of the fixing seat; the PI positioning control device is electrically connected to the circuit board.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The present invention optimizes the structure of the blade lever assembly, integrating the lever with the blades. On the one hand, the integrated blade lever assembly can save the riveting process of the traditional aperture control structure. The prepared blade lever has no bumps, which saves more space for blade assembly and improves the reliability of the integration. At the same time, the blade surface is smoother, reducing noise during operation, achieving quieter operation, higher precision, and improved system operational stability. On the other hand, this also promotes the standardized production of blade levers, simplifies the production process, reduces manufacturing steps, and improves production efficiency.

[0020] Furthermore, the present invention improves the structure of the turntable and the fixed seat, and designs sliding matching structures such as the arc groove and the limit block, and the limit groove and the limit protrusion, respectively, to reduce the friction surface and ensure axial clearance, further reducing noise and improving the quiet effect of the present invention; and a PI positioning control device is provided on the arc groove to provide accurate real-time feedback, which can achieve effective and high-precision control of the aperture; thereby achieving the technical effect of quiet and high-precision control of the present invention;

[0021] 2. In addition, integrating the blades and lever allows for more flexible spatial layout and design optimization. Combined with the structural optimization of the fixing base, the entire aperture control structure is more compact, reducing the number of components required in the aperture control structure, reducing interference between components and complex spatial arrangements, saving space in the control structure, and increasing the overall light throughput of the utility model. It can be applied to the large aperture structure of micro single-lens cameras, achieving a light throughput of F1.4 to F16.

[0022] 3. The turntable and the fixing base of the present invention are designed to fit together more compactly and precisely, reducing the relative movement between the components. An arc-shaped limit block is provided on the outside of the turntable, and an arc-shaped groove is provided on the fixing base. The length of the arc-shaped groove is the same as the rotation stroke of the turntable. The limit block is sunken into the arc-shaped groove of the fixing base, further saving installation space and reducing the need for external space. At the same time, the fixing cover and the fixing base are fastened by snaps to achieve a tight assembly between the two. No additional tools are required, and they can be quickly disassembled and assembled, making the present invention more convenient for assembly and maintenance.

[0023] 4. The present invention can reduce the dependence on traditional fasteners such as screws. By fixing the elastic clips with the connectors, the assembly and maintenance process of the components is simplified, and the loosening and vibration problems of the components that may be caused by traditional screws are avoided, further ensuring the quietness of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the silent high-precision aperture control structure of the preferred embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the decomposition of the silent high-precision aperture control structure of the preferred embodiment of the utility model;

[0026] Figure 3 This is a partial exploded schematic diagram of the silent high-precision aperture control structure of the preferred embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the overall structure of the blades of the silent high-precision aperture control structure of the preferred embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the overall structure of the turntable of the silent high-precision aperture control structure of the preferred embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the overall structure of a silent high-precision aperture control structure in another preferred embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the overall structure decomposition of a silent high-precision aperture control structure in another preferred embodiment of the present invention.

[0031] In the picture:

[0032] 1. Fixed seat; 11. Rotating hole; 12. Limiting column; 13. Mounting slot; 14. Limiting protrusion; 15. Arc-shaped through slot; 16. Connecting piece; 161. Guide slope; 2. Turntable; 21. Long hole; 211. Notch; 22. Teeth; 23. Limiting slot; 231. End limiting piece; 24. Arc-shaped limiting block; 3. Blade lever group; 31. Blade; 311. Limiting hole; 32. Lever; 4. Drive assembly; 41. Drive motor; 42. Motor mounting plate; 43. Circuit board; 44. Transmission gear; 5. Fixed cover; 51. Elastic buckle; 511. Buckle slot; 6. PI positioning control device. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0034] In the description of the present invention, unless otherwise specified, the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. In addition, the "first" and "second" mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0035] like Figure 1-7 As shown, the present invention provides a silent, high-precision aperture control structure, which is applied to imaging devices such as micro-single lenses, achieving a light transmission of F1.4 to F16. The structure comprises a fixing base 1, a rotating disk 2 disposed on the fixing base 1, a blade lever group 3, and a driving assembly 4. A rotating hole 11 is provided in the middle of the fixing base 1. The rotating disk 2 is rotatably disposed on the fixing base 1 and is connected to the rotating hole 11.

[0036] The blade lever assembly 3 includes a plurality of blades 31 movably mounted on the upper surface of the turntable 2. Each blade 31 has a lever 32 integrally formed at one end. The turntable 2 is radially provided with an elongated hole 21 through which the lever 32 can be moved. The drive assembly 4 includes a drive motor 41 mounted on a side of the fixed base 1 away from the turntable 2. The turntable 2 is provided with teeth 22 distributed along the outer circumference of the turntable 2. The output shaft of the drive motor 41 passes through the fixed base 1 and engages with the teeth 22. The drive motor 41 drives the turntable 2 to rotate, and the lever 32 moves along the elongated hole 21, driving the blades 31 to rotate. The plurality of blades are combined to form an adjustable light aperture. In this embodiment, the primary function of the light aperture is to allow light to pass through it into the imaging device. By adjusting the size of the rotating hole (i.e., the diameter of the aperture), the amount of light entering the device can be controlled, which is a key factor affecting image brightness and exposure.

[0037] In this embodiment, the long aperture is radially arranged to allow the blade lever to slide back and forth, thereby achieving aperture adjustment driven by the turntable.

[0038] The aperture actuation method of the utility model is as follows: the driving motor is fixed on the fixing base and meshes with the teeth of the turntable installed on the fixing base, and the turntable drives the blade lever group to rotate and actuate, and the inner side is combined with other blades to form an adjustable light hole.

[0039] In order to assist in limiting the rotation of the blades, preferably, a notch 211 is provided at one end of the elongated hole 21 facing the center of the turntable 2 , and the notch 211 gradually narrows toward the center of the turntable 2 .

[0040] To be further detailed, the driving motor 41 is mounted on the fixing base 1 via a motor mounting plate 42; the fixing base 1 is penetrated by a through hole, the output shaft of the driving motor 41 passes through the through hole, and is meshed with the teeth 22 of the turntable 2 through a transmission gear for transmission.

[0041] In this embodiment, the driving assembly 4 includes a circuit board 43 electrically connected to the driving motor 41 . The circuit board 43 is an FPC circuit board 43 , and its working principle can be referred to the prior art.

[0042] In other optional implementations, the circuit board 43 may also be an SMT circuit board.

[0043] Preferably, the upper surface of the fixing base 1 is provided with a plurality of circumferentially spaced limiting posts 12 along the outer circumference of the turntable 2. The blade 31 is provided with limiting holes 311 that mate with the limiting posts 12; the limiting posts 12 are inserted into the limiting holes 311 to secure the blade 31. In this embodiment, the limiting holes of the blades are mounted on the limiting posts, while the shifting rod is inserted into the elongated hole of the turntable and slides back and forth. The limiting posts effectively position the blades, preventing displacement due to vibration or impact during use and improving system stability.

[0044] Preferably, the upper surface of the fixing base 1 is recessed downward to form a mounting groove 13 adapted for the turntable 2. The sidewalls of the mounting groove 13 are provided with a plurality of limiting protrusions 14 extending radially toward the turntable 2. The outer periphery of the turntable 2 is provided with limiting grooves 23 extending along its circumference. When the turntable 2 rotates, the limiting protrusions 14 can move along the limiting grooves 23. Preferably, the ends of the limiting grooves 23 are provided with end limiting members 231 for limiting the travel of the limiting protrusions 14.

[0045] Preferably, an arc-shaped limit block 24 extending toward the fixing seat 1 is provided on the outer side of the turntable 2 , and an arc-shaped through slot 15 is penetrated through the fixing seat 1 for allowing the arc-shaped limit block 24 to reciprocate.

[0046] Specifically, a PI positioning control device 6 for sensing the arc-shaped stop block is provided at the bottom of the fixing base; the PI positioning control device 6 is electrically connected to the circuit board. In this embodiment, the coordination between the stop block and the through slot prevents excessive rotation of the turntable. The PI positioning control device 6 can sense the position of the arc-shaped stop block 24 in real time and provide feedback. The high precision of the PI positioning control device ensures accurate monitoring of the turntable position. The fast-response sensor system enables precise adjustment of the turntable within the set range, ensuring efficient and stable aperture control.

[0047] The utility model optimizes the structure of the blade lever assembly and integrates the lever with the blade. On the one hand, compared with the traditional riveting process, the blade lever prepared by the integrated blade lever assembly has no convex points, which saves more space for blade assembly and has better integrated reliability. At the same time, the blade surface is smoother, which reduces noise generation during operation, makes operation quieter and more accurate, and improves the operational stability of the system. On the other hand, this can also promote the standardized production of blade levers, simplify the production process, reduce manufacturing steps, and improve production efficiency.

[0048] Furthermore, the present invention also improves the structure of the turntable and the fixed seat, and designs sliding matching structures such as arc grooves and limit blocks, and limit grooves and limit protrusions, to reduce the friction surface and ensure axial clearance movement, further reduce noise, and improve the silent effect of the present invention; and a PI positioning control device is set on the arc groove to provide accurate real-time feedback, which can achieve effective and high-precision control of the aperture; so as to realize the technical effect of silent and high-precision control of the present invention.

[0049] In addition, integrating the blades and the lever together allows for more flexible spatial layout and design optimization. Combined with the structural optimization of the fixing base, the entire aperture control structure is made more compact, the number of components required in the aperture control structure is reduced, interference between components and complex spatial arrangements are reduced, and space for the control structure is saved, resulting in a greater overall light throughput of the utility model. It can be applied to the large aperture structure of a micro single-lens camera, achieving a light throughput of F1.4 to F16.

[0050] Preferably, a fixing cover 5 is provided above the blade shift lever assembly 3; a plurality of connectors 16 are spaced apart along the circumference of the fixing base 1. The fixing cover 5 is provided with a plurality of elastic clips 51 connected to the connectors 16 on its outer circumference. The elastic clips 51 are provided with buckle grooves 511 adapted to the connectors 16, and the elastic clips 51 are fixedly engaged with the connectors 16 through the buckle grooves 511. The fixing base is provided with buckles, and the fixing cover is fastened thereto to prevent the blade shift lever assembly from falling off axially.

[0051] The cooperation design of the turntable and the fixing seat of the utility model is more compact and precise, reducing the relative movement between the components. An arc-shaped limit block is provided on the outer side of the turntable, and an arc-shaped groove is provided on the fixing seat. The length of the arc-shaped groove is the same as the rotation stroke of the turntable; the limit block is sunken in the arc-shaped groove of the fixing seat, further saving installation space and reducing the demand for external space; at the same time, the fixing cover and the fixing seat adopt a snap-fastening method to achieve a tight assembly of the two, without the need for additional tools, and can be quickly disassembled and assembled, which is more convenient for the assembly and maintenance of the utility model.

[0052] Preferably, the end of the connector 16 proximal to the fixing cover 5 is provided with a guide slope 161 inclined toward the fixing base 1. In this embodiment, the snap-fit design of the elastic buckle 51 and the connector 16 greatly simplifies the installation process of the fixing cover 5. Only a simple press is required to complete the fixation, reducing the reliance on tools and reducing the difficulty of operation. At the same time, it ensures stable fixation and improves assembly accuracy, reducing the reliance on traditional fasteners such as screws. The automatic alignment and snap-fit design reduces the potential errors that may occur during manual assembly and improves the overall assembly quality.

[0053] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A silent and high-precision aperture control structure, characterized in that: The cam is adapted to move the drive lever relative to the fixed base so as to enable the cam to move relative to the fixed base when the cam is in motion.

2. The silent high-precision aperture control structure according to claim 1, characterized in that: The upper surface of the fixing seat is provided with a plurality of limiting posts distributed along the circumference of the turntable at intervals, and the blade is provided with limiting holes corresponding to the limiting posts; the limiting posts are passed through the limiting holes to fix the blade.

3. The silent high-precision aperture control structure according to claim 2, characterized in that: The upper surface of the fixing seat is recessed downward and is provided with a mounting groove adapted to the turntable. The side walls of the mounting groove are provided with a plurality of limiting protrusions extending radially toward the turntable. The outer periphery of the turntable is provided with limiting grooves extending along its circumference. When the turntable rotates, the limiting protrusions can move along the limiting grooves.

4. The silent and high-precision aperture control structure according to claim 3, wherein: A notch is provided at one end of the elongated hole facing the center of the turntable, and the notch gradually narrows toward the center of the turntable.

5. The silent and high-precision aperture control structure according to claim 4, wherein: An end limiting piece is provided at the end of the limiting groove for limiting the moving stroke of the limiting protrusion.

6. The silent high-precision aperture control structure according to claim 5, characterized in that: The driving motor is mounted on the fixing seat via a motor mounting plate; the fixing seat is penetrated by a through hole, the output shaft of the driving motor passes through the through hole, and is meshed with the teeth of the turntable through a transmission gear for transmission.

7. The silent high-precision aperture control structure according to any one of claims 1 to 6, characterized in that: An arc-shaped limiting block extending toward the fixing seat is provided on the outer side of the turntable, and an arc-shaped through groove for allowing the arc-shaped limiting block to move back and forth is penetrated through the fixing seat.

8. The silent and high-precision aperture control structure according to claim 7, wherein: A fixing cover is provided above the blade lever group; a plurality of connecting parts are distributed at intervals along the circumference of the fixing seat, and a plurality of elastic clips connected to the connecting parts are provided on the outer periphery of the fixing cover, and the elastic clips are provided with buckle grooves adapted to the connecting parts, and the elastic clips are fixed to the connecting parts through the buckle grooves.

9. The silent and high-precision aperture control structure according to claim 8, wherein: An end of the connecting piece close to the fixing cover is provided with a guiding inclined surface inclined toward the fixing seat.

10. The silent and high-precision aperture control structure according to claim 8, wherein: The driving component includes a circuit board electrically connected to the driving motor, and the circuit board is one of an FPC circuit board and an SMT circuit board.

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