Variable aperture control device compact in structure and capable of being quickly disassembled and assembled

Abstract

The utility model discloses a variable aperture control device which is compact in structure and can be quickly assembled and disassembled. The variable aperture structure comprises a base, a rotating disc, a driving piece, a plurality of blade driving lever groups and a fixed cover, a gear is arranged on the turntable, and an adjusting hole is formed in the radial direction for the blade driving lever to slide back and forth; according to the utility model, the blade driving lever group adopts an integral forming processing mode, and the prepared blade driving lever has no salient points, so that more blade assembly space is saved, and the integration reliability is better; when the shutter is installed on the base, the limiting deflector rod at one end of the integrally-formed blade is inserted into the limiting hole of the base to complete primary positioning and sequential stacking and laying, then the rotating disc is aligned with the adjusting deflector rod of the blade through the adjusting hole of the rotating disc and sleeved with the adjusting deflector rod, positioning of the rotating disc is rapidly completed, and the rotating disc is installed on the base, so that the whole structure of the shutter is more compact; and meanwhile, positioning of the blade and the base and positioning of the blade and the rotating disc can be completed through the shifting rod structure integrally formed on the blade, convenience and rapidness are achieved, and the assembly precision is high.

Description

Technical Field

[0001] The utility model relates to the technical field of aperture devices, in particular to a variable aperture control device with compact structure and quick assembly and disassembly. Background Art

[0002] Aperture assemblies are used in optical systems to adjust the amount of light passing through, achieving variable aperture functionality. Currently, these assemblies typically utilize a multi-blade structure. This is due to the flexible aperture adjustment range it provides, with each blade controlled by an independent lever. When the aperture opening is at its maximum diameter, the blades retract within the width of the locking cover. Consequently, these multi-blade structures face challenges such as bulk, difficulty fitting into existing spaces, complex assembly and maintenance, difficulty disassembling, noise issues, and difficulties in achieving a thin design. These issues limit the application of aperture assemblies in modern miniaturized and compact devices.

[0003] Furthermore, the assembly process for multi-blade structures is relatively complex, requiring each blade to be precisely aligned with its own lever system. This process is not only tedious but also prone to assembly errors. For example, the alignment of the blades, the engagement of the levers, and the adjustment of the drive mechanism all require precise operation, otherwise the proper function of the aperture will be affected. Assembly errors can not only lead to unstable aperture function but also affect the accuracy of aperture adjustment, negatively impacting the product's imaging quality. The connection structure between multiple blades and the drive assembly is typically complex, making disassembly and assembly difficult.

[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 variable aperture control device with a compact structure and quick assembly and disassembly.

[0006] The purpose of this utility model is achieved by the following technical solutions:

[0007] A compact and quickly disassembled variable aperture control device comprising:

[0008] A base, wherein a through hole is provided in the middle of the base;

[0009] The blade lever assembly includes a plurality of blades, each blade being fan-shaped, and an integrally formed limit lever is provided on the lower surface of one end of the blade; the base is provided with a limit hole matching the limit lever, and the plurality of blades are positioned on the base by inserting the limit lever into the limit hole and sequentially surrounding the edge of the through hole;

[0010] A turntable, the turntable transmission is arranged above the blade; an integrally formed adjustment lever is provided on the upper surface of the blade away from the limit lever, and the turntable is provided with adjustment holes slidably engaged with the adjustment lever at intervals along its circumference; the adjustment holes are radially arranged on the turntable;

[0011] A driving member is provided below the base. The turntable is provided with teeth distributed along its outer peripheral sidewall. An output shaft thereof passes through the base and engages with the teeth through a transmission gear, thereby driving the turntable to rotate, thereby rotating the blades.

[0012] A fixed cover is provided on top of the base; a plurality of connecting buckles are distributed at intervals along the circumference of the base, and a plurality of elastic hanging ears are provided on the periphery of the fixed cover for being clamped and connected with the connecting buckles.

[0013] Furthermore, the elastic hanging ear is provided with a buckle groove adapted to the connecting buckle, and the elastic hanging ear is fixed to the connecting buckle through the buckle groove.

[0014] Furthermore, an end of the connecting buckle close to the fixing cover is provided with a guiding inclined surface inclined toward the base.

[0015] Furthermore, the base is provided with turntable mounting grooves on the upper and lower sides for mounting the turntable, and a gear mounting groove for mounting the transmission gear is provided adjacent to one side of the turntable mounting groove. A driven gear is also provided on the gear mounting groove, and the transmission gear is connected to the teeth of the turntable through the driven gear.

[0016] Furthermore, the inner side wall of the turntable mounting groove is provided with a plurality of limit blocks extending radially toward the turntable, and the outer periphery of the turntable is provided with limit steps extending along its circumference; when the turntable rotates in the turntable mounting groove, the limit blocks can move along the limit steps.

[0017] Furthermore, an arc-shaped positioning block extending toward the base is provided on the outer side of the turntable, and the base is provided with an arc-shaped groove for the positioning block to move back and forth; the length of the arc-shaped groove is the same as the rotation stroke of the turntable.

[0018] Furthermore, the driving component is a stepper motor, the bottom surface of the base is provided with a circuit board electrically connected to the stepper motor, the arc groove is provided with a sensing device for sensing the positioning block; the arc groove is provided with a sensing notch, and the sensing device is electrically connected to the circuit board through the sensing notch.

[0019] Furthermore, the circuit board includes a bent end perpendicular to the base, and the bent end is provided with limiting side strips extending to both sides; the base is provided with a clamping portion for limiting the circuit board, and the circuit board is mounted on the clamping portion through the positioning block.

[0020] Furthermore, the stepper motor is mounted on the base via a motor mounting plate; a through hole is provided through the base, and the output shaft of the stepper motor passes through the through hole and is connected to the transmission gear.

[0021] Furthermore, the circuit board is an SMT circuit board.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The present invention optimizes the structure of the blades, and forms the blades, lever and limit lever into one piece; on the one hand, compared with the riveting process of the traditional aperture control structure, the blade lever prepared by the integrated blades, lever and limit lever has no convex points, which saves more space for blade assembly, and at the same time has better reliability, avoids the accumulation of tolerances between multiple parts, reduces the movement instability or error caused by assembly error, and has higher precision; at the same time, it is convenient for the assembly of the present invention, and only needs to insert the limit lever at one end of the integrally formed blade into the limiting hole of the base to complete the initial positioning, and then stack and arrange them in sequence, and then align the turntable with the adjusting lever of the blade through its adjustment hole, and put it into the adjusting lever to quickly complete the positioning of the turntable and install it on the base, so that the overall structure of the shutter is more compact, and at the same time, the positioning of the blade and the base and the positioning of the blade and the turntable can be completed by the lever structure integrally formed on the blade, which is convenient and fast, and has high assembly precision;

[0024] 2. Furthermore, the fixed cover and the base are tightly assembled by means of a snap fastening system. The elastic lugs engage with the connecting buckles through the buckle grooves, allowing the fixed cover to be quickly installed on the base without the need for additional tools, simplifying the assembly process and further improving assembly efficiency. This also facilitates the removal of the fixed cover. At the same time, the snap-fit structure between the elastic lugs and the connecting buckles provides a stable connection, ensuring that the blade lever assembly will not loosen axially during use, thereby improving assembly stability.

[0025] 3. The compact design of the present invention is also reflected in: a mounting groove for the transmission gear and the driven gear is provided on one side of the turntable on the base, and the turntable and the blade assembly and the transmission gear and the driven gear assembly do not protrude from the surface of the base after being installed on the base; at the same time, an arc-shaped positioning block is provided on the outer side of the turntable, and an arc-shaped groove is provided on the base, and the length of the arc-shaped groove is the same as the rotation stroke of the turntable; the positioning block is sunken in the arc-shaped groove of the base, further saving installation space and reducing the demand for external space; and the stepping motor passes through the base from the other side of the base and is connected to the transmission gear, making the compact design of the present invention more prominent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a variable aperture control device with a compact structure and quick assembly and disassembly according to a preferred embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the variable aperture control device with a compact structure and quick disassembly and assembly according to a preferred embodiment of the present invention;

[0028] Figure 3 This is a schematic exploded view from another angle of the overall structure of the compact and quickly disassembled variable aperture control device of the preferred embodiment of the present invention;

[0029] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at center A;

[0030] Figure 5 This is a schematic diagram of the overall structure of the base of the variable aperture control device with a compact structure and quick disassembly and assembly according to a preferred embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the overall structure of the turntable of the variable aperture control device with a compact structure and quick disassembly and assembly according to a preferred embodiment of the utility model;

[0032] Figure 7 This is a schematic diagram of the overall structure of the blades of the variable aperture control device with a compact structure and quick disassembly and assembly according to a preferred embodiment of the utility model;

[0033] Figure 8 This is a schematic diagram of the overall structure of a variable aperture control device with a compact structure and quick assembly and disassembly according to another preferred embodiment of the present invention;

[0034] Figure 9 This is a partial exploded schematic diagram of the overall structure of another preferred embodiment of the present invention, which is a compact and quickly disassembled variable aperture control device;

[0035] Figure 10 This is a schematic diagram of the overall structure of the base of another preferred embodiment of the utility model, which has a compact structure and can be quickly disassembled and assembled.

[0036] In the picture:

[0037] 1. Base; 11. Through hole; 12. Limit hole; 13. Turntable mounting slot; 14. Gear mounting slot; 15. Limit block; 16. Arc groove; 17. Sensing notch; 18. Clamping part; 19. Connecting buckle; 191. Guide slope;

[0038] 2. Blade; 21. Limit lever; 22. Adjustment lever;

[0039] 3. Turntable; 31. Adjustment hole; 32. Teeth; 33. Limiting step; 34. Positioning block;

[0040] 4. Driving member; 41. Transmission gear; 42. Driven gear;

[0041] 5. Circuit board; 51. Bending end; 511. Limiting side strip;

[0042] 6. Sensing device;

[0043] 7. Fixed cover; 71. Elastic hanging ear; 711. Buckle slot;

[0044] 8. Motor mounting plate. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] like Figure 1-10 As shown, the utility model provides a variable aperture control device with a compact structure and quick assembly and disassembly, specifically comprising:

[0048] The base 1 has a through hole 11 in the middle. The main function of the through hole is to allow light to pass through it and enter the imaging device. By adjusting the size of the through hole (i.e., the diameter of the aperture), the amount of light entering the device can be controlled. This is a key factor affecting image brightness and exposure.

[0049] The blade lever group includes multiple blades 2, each of which is fan-arc shaped. The lower surface of one end of the blade 2 is provided with an integrally formed limit lever 21; the base 1 is provided with a limit hole 12 matching the limit lever 21, and the multiple blades 2 are arranged on the base 1 through the insertion and limitation of the limit lever 21 and the limit hole 12, and are sequentially surrounded by the edge of the through hole 11; the fan-arc blades are arranged around the through hole, which can evenly change the size of the aperture during rotation or movement.

[0050] The turntable 3 is transmission-arranged above the blade 2; an integrally formed adjustment lever 22 is provided on the upper surface of the blade 2 away from the limit lever 21, and the turntable 3 is provided with adjustment holes 31 slidably engaged with the adjustment lever 22 at intervals along its circumference; the adjustment holes 31 are radially arranged on the turntable 3; the adjustment lever on the turntable slides with the adjustment holes on the turntable, thereby ensuring the accuracy of the adjustment process and allowing the adjustment mechanism to be compactly integrated inside the turntable.

[0051] The driving member 4 is arranged below the base 1. The turntable 3 is provided with teeth 32 distributed along its outer peripheral side wall. Its output shaft penetrates the base 1 and engages with the teeth 32 through the transmission gear 41, driving the turntable 3 to rotate, thereby rotating the blade 2.

[0052] The fixing cover 7 is covered on the base 1 ; a plurality of connecting buckles 19 are distributed along the circumference of the base 1 , and a plurality of elastic hanging ears 71 are provided on the outer periphery of the fixing cover 7 for clamping and connecting with the connecting buckles 19 .

[0053] Preferably, the elastic lug 71 is provided with a buckle slot 711 adapted to mate with the connecting buckle 19, and the elastic lug 71 is secured to the connecting buckle 19 via the buckle slot 711. Furthermore, the connecting buckle 19 is provided with a guide slope 191 inclined toward the base 1 on the end proximal to the fixing cover 7. In this embodiment, this design has the advantage that, during assembly of the fixing cover and the base, the guide slope 191 facilitates the elastic lug 71 to more easily engage with the connecting buckle, forming a stable connection.

[0054] In this embodiment, a through-hole is provided in the center of the base, and the blades are positioned by the cooperation of the limiting lever and the limiting hole, and surround the edge of the through-hole. The close integration of the base and blades simplifies the assembly process of the aperture control structure and reduces the need for external parts.

[0055] The present invention optimizes the structure of the blades and forms the blades, the lever and the limit lever in one piece. On the one hand, compared with the riveting process of the traditional aperture control structure, the blade lever prepared by the integrated blade, the lever and the limit lever has no convex points, which saves more space for blade assembly. At the same time, the integrated reliability is better, the tolerance accumulation between multiple parts is avoided, the movement instability or error caused by assembly error is reduced, and the precision is higher. At the same time, it is convenient for the assembly of the present invention to only insert the limit lever at one end of the integrally formed blade into the limiting hole of the base to complete the preliminary positioning, and then stack and arrange them in sequence, and then align the turntable with the adjusting lever of the blade through its adjusting hole, and put it into the adjusting lever to quickly complete the positioning of the turntable and install it on the base, so that the overall structure of the shutter is more compact. At the same time, the positioning of the blade and the base and the positioning of the blade and the turntable can be completed by the lever structure integrally formed on the blade, which is convenient and fast, and the assembly precision is high.

[0056] Furthermore, the fixing cover and the base are tightly assembled by means of snap fastening. The elastic hanging ear is engaged with the connecting buckle through the buckle groove, so that the fixing cover can be quickly installed on the base without the need for additional tools, which simplifies the assembly steps and further improves the assembly efficiency; it is also conducive to the disassembly of the fixing cover; at the same time, the snap-fit structure of the elastic hanging ear and the connecting buckle provides a stable connection, ensuring that the blade lever group will not loosen axially during use, thereby improving the assembly stability.

[0057] Preferably, the base 1 is recessed with turntable mounting grooves 13 for mounting the turntable 3 on the upper and lower sides, and a gear mounting groove 14 for mounting the transmission gear 41 is adjacent to one side of the turntable mounting groove 13. A driven gear 42 is also provided on the gear mounting groove 14, and the transmission gear 41 is meshed and connected with the teeth 32 of the turntable 3 through the driven gear 42.

[0058] Preferably, the driving element 4 is a stepper motor. A circuit board 5 electrically connected to the stepper motor is provided on the bottom surface of the base 1. A sensing device 6 for sensing the positioning block 34 is provided on the arcuate groove 16. A sensing notch 17 is provided on the arcuate groove 16, and the sensing device 6 is electrically connected to the circuit board 5 via the sensing notch 17. In this embodiment, the circuit board 5 is a conventional SMT circuit board. The present invention does not elaborate on its structural principles.

[0059] Specifically, the stepper motor is mounted on the base 1 via a motor mounting plate 8. The base 1 is provided with a through-hole, through which the output shaft of the stepper motor passes to connect with the transmission gear 41. In this embodiment, the use of a stepper motor improves the precision and reliability of the drive system. Furthermore, the through-hole allows the output shaft to be directly connected to the transmission gear, thereby saving space.

[0060] Preferably, the inner sidewall of the turntable mounting slot 13 is provided with a plurality of limit blocks 15 extending radially toward the turntable 3, and the outer periphery of the turntable 3 is provided with limit steps 33 extending along its circumference; when the turntable 3 rotates within the turntable mounting slot 13, the limit blocks 15 can move along the limit steps 33. In this embodiment, the design of the turntable mounting slot and the gear mounting slot allows the turntable and drive components to be centrally located within the base, reducing structural complexity.

[0061] Preferably, the turntable 3 is provided with an arc-shaped positioning block 34 extending toward the base 1 on its exterior. The base 1 is provided with an arc-shaped slot 16 for reciprocating movement of the positioning block 34. The length of the arc-shaped slot 16 is the same as the rotational stroke of the turntable 3. The arc-shaped positioning block is provided on the exterior of the turntable, and the arc-shaped slot is provided on the base. The length of the arc-shaped slot is the same as the rotational stroke of the turntable. This design not only effectively limits the turntable's rotation range but also utilizes the space within the arc-shaped slot, reducing the need for external space.

[0062] In this embodiment, the compact design of the present invention is also reflected in: mounting grooves for the transmission gear and the driven gear are provided on one side of the turntable on the base, and the turntable and the blade group and the transmission gear and the driven gear group do not protrude from the surface of the base after being installed on the base; at the same time, an arc-shaped positioning block is provided on the outside of the turntable, and the base is provided with an arc-shaped groove, and the length of the arc-shaped groove is the same as the rotation stroke of the turntable; the positioning block is sunken in the arc-shaped groove of the base, further saving installation space and reducing the demand for external space; and the stepper motor passes through the base from the other side of the base and is connected to the transmission gear, which makes the compact design of the present invention more prominent.

[0063] To improve the assembly stability of the circuit board and the base and reduce the need for additional connectors, the circuit board 5 preferably includes a bent end 51 perpendicular to the base 1, with limiting side strips 511 extending to both sides of the bent end 51. The base 1 is provided with a retaining portion 18 for retaining the circuit board 5, and the circuit board 5 is mounted on the retaining portion 18 via the limiting side strips 511. In this embodiment, the retaining portion 18 is a retaining frame with a through hole extending downward from the edge of the base. The bent end of the circuit board is inserted downward into the retaining portion. The distal end of the retaining portion also extends inwardly and is provided with opposing hooks. A retaining area is formed between the two hooks to hold the bent end. The width of this area is smaller than the width of the limiting side strips. At the same time, the bent end will keep the circuit board and the base against each other, enhancing the stability of their assembly.

[0064] The compact structure of the present invention allows it to be integrated into a more compact imaging device, which is particularly important for application scenarios requiring space optimization. In addition, it can better adapt to different design needs and environmental requirements and has greater design flexibility. The compact structure and integrated design reduce errors and motion blockages, improve the accuracy and stability of aperture adjustment, and enhance the imaging effect and image quality.

[0065] 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 compact and quickly disassembled variable aperture control device, characterized in that: include: A base, wherein a through hole is provided in the middle of the base; The blade lever assembly includes a plurality of blades, and an integrally formed limit lever is provided on the lower surface of one end of the blade; the base is provided with a limit hole matching the limit lever, and the plurality of blades are positioned on the base by inserting the limit lever into the limit hole and sequentially surrounding the edge of the through hole; A turntable, the turntable transmission is arranged above the blade; an integrally formed adjustment lever is provided on the upper surface of the blade away from the limit lever, and the turntable is provided with adjustment holes slidably engaged with the adjustment lever at intervals along its circumference; the adjustment holes are radially arranged on the turntable; A driving member is provided below the base. The turntable is provided with teeth distributed along its outer peripheral sidewall. An output shaft thereof passes through the base and engages with the teeth through a transmission gear, thereby driving the turntable to rotate, thereby rotating the blades. A fixed cover is provided on top of the base; a plurality of connecting buckles are distributed at intervals along the circumference of the base, and a plurality of elastic hanging ears are provided on the periphery of the fixed cover for being clamped and connected with the connecting buckles.

2. The compact and quickly disassembled variable aperture control device according to claim 1, characterized in that: The elastic hanging ear is provided with a buckle groove adapted to the connecting buckle, and the elastic hanging ear is fixedly engaged with the connecting buckle through the buckle groove.

3. The compact and quickly disassembled variable aperture control device according to claim 2, characterized in that: An end of the connecting buckle close to the fixing cover is provided with a guiding inclined surface inclined toward the base.

4. The compact and quickly disassembled variable aperture control device according to claim 3, characterized in that: The base is concavely provided with turntable mounting grooves for mounting the turntable, and a gear mounting groove for mounting the transmission gear is adjacent to one side of the turntable mounting groove. A driven gear is also provided on the gear mounting groove, and the transmission gear is meshed with the teeth of the turntable through the driven gear.

5. The compact and quickly disassembled variable aperture control device according to claim 4, characterized in that: The inner side wall of the turntable installation groove is provided with a plurality of limit blocks extending radially toward the turntable, and the outer periphery of the turntable is provided with a limit step extending along its circumference; when the turntable rotates in the turntable installation groove, the limit blocks can move along the limit step.

6. The compact and quickly disassembled variable aperture control device according to claim 4, characterized in that: An arc-shaped positioning block extending toward the base is provided on the outer side of the turntable, and the base is provided with an arc-shaped groove for the positioning block to move back and forth; the length of the arc-shaped groove is the same as the rotation stroke of the turntable.

7. The compact and quickly disassembled variable aperture control device according to claim 6, characterized in that: The driving component is a stepper motor, and a circuit board electrically connected to the stepper motor is provided on the bottom surface of the base. A sensing device for sensing the positioning block is provided on the arc groove; a sensing notch is provided on the arc groove, and the sensing device is electrically connected to the circuit board through the sensing notch.

8. The compact and quickly disassembled variable aperture control device according to claim 7, characterized in that: The circuit board includes a bent end perpendicular to the base, and the bent end is provided with limiting side strips extending to both sides; the base is provided with a clamping portion for limiting the circuit board, and the circuit board is mounted on the clamping portion through the limiting side strips.

9. The compact and quickly disassembled variable aperture control device according to claim 7, wherein: The stepper motor is mounted on the base via a motor mounting plate; a through hole is formed through the base, and the output shaft of the stepper motor passes through the through hole and is connected to the transmission gear.

10. The compact and quickly disassembled variable aperture control device according to claim 9, characterized in that: The circuit board is an SMT circuit board.

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