A blade deformation prevention aperture structure eliminating a guide gap and a photographic equipment

Abstract

This invention relates to the field of aperture structure technology, specifically to an aperture structure and photographic equipment that eliminates guide clearance and prevents blade deformation. By setting the abutment position of the free end of the elastic element on the side of the mating post close to the blade body, the transmission arm is shortened. Under the premise of constant preload of the elastic element, it is beneficial to reduce the torque acting on the aperture blade, which helps to avoid the overall warping or plastic deformation of the aperture blade caused by the traditional long lever arm arrangement. This significantly improves the durability and reliability of the aperture blade and effectively solves the problem in existing aperture structures where the elastic element generates a large torque due to the long lever arm acting on the aperture blade, which easily leads to the deformation of the aperture blade and a reduction in service life.

Description

Technical Field

[0001] This invention relates to the field of aperture structure technology, specifically to an aperture structure and photographic equipment that eliminates guide gaps and prevents blade deformation. Background Technology

[0002] The aperture structure is an important component of photographic equipment. It is mainly used to control the amount of light passing through the lens. The size of the light-gathering aperture can be flexibly changed according to the shooting scene, lighting environment and creative needs, thereby adjusting the exposure effect of the image. At the same time, it can also help control the depth of field and optimize the image quality, thus ensuring the clarity and visual performance of the image under different working conditions.

[0003] During aperture imaging, the aperture diameter needs to be adjusted by rotating the aperture blades. Due to the unavoidable gap between the aperture blades and the turntable, the shape accuracy of the adjustment hole (aperture aperture) formed by multiple aperture blades is insufficient, resulting in a deviation from the designed aperture diameter and affecting the image quality. Therefore, some existing aperture structures have an elastic element between the fixing mechanism and the aperture blades, with one end of the elastic element abutting against the fixing mechanism and the other end abutting against the aperture blades, thereby continuously providing a preload force to the aperture blades, forcing the aperture blades to always be in close contact with the turntable to eliminate the gap. However, because the lever arm of the elastic element acting on the aperture blades is relatively long, the generated torque is large, which can easily cause the aperture blades to deform under stress, reducing the service life of the aperture blades.

[0004] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0005] In the existing aperture structure, the elastic element generates a large torque due to its long lever arm acting on the aperture blades, which easily leads to deformation of the aperture blades and a reduced service life. The technical solution adopted by this invention to solve this problem is as follows: An aperture structure for eliminating guide clearance and preventing blade deformation includes a fixed base, a turntable, aperture blades, and a partition. The turntable is rotatably mounted in the fixed base. The aperture blades are connected to the turntable via a guide structure and can rotate relative to the fixed base. The partition is located on the side of the aperture blades away from the turntable. The aperture blades include a blade body and a mating post connected to the blade body. The mating post extends from the blade body toward the partition. The partition is provided with an elastic element. The fixed end of the elastic element abuts against the partition to define the installation position, and the free end of the elastic element abuts against the mating post to apply a preload force to the aperture blades. The position where the free end of the elastic element abuts against the mating post is located on the side of the mating post closer to the blade body.

[0006] Furthermore, the partition plate is provided with a mounting post and a fixing protrusion, the elastic element is a torsion spring, the torsion spring is sleeved on the outer peripheral wall of the mounting post, the fixing protrusion is provided with a stop notch, and the fixed end of the torsion spring abuts against the stop notch.

[0007] Furthermore, the mating post is arranged parallel to the mounting post; the mounting post is provided with a fixed surface corresponding to the fixed end position of the torsion spring and a free surface corresponding to the free end position of the torsion spring. The fixed surface is located on the side of the mounting post away from the aperture blade, and the free surface is located on the side of the mounting post near the connection between the mating post and the blade body.

[0008] Furthermore, the fixing protrusion includes a first protrusion and a second protrusion, the first protrusion and the second protrusion being perpendicularly connected to form the stop notch.

[0009] Furthermore, the guiding structure includes a positioning post, a positioning hole, a guide post, and a guide groove; the positioning post is disposed on one of the blade body and the fixed base, the positioning hole is disposed on the other of the blade body and the fixed base, and the positioning post extends into the positioning hole to define the rotation center of the aperture blade; the guide post is disposed on one of the blade body and the turntable, the guide groove is disposed on the other of the blade body and the turntable, the guide post passes through the guide groove, and when the turntable rotates, the aperture blade is driven to rotate around the rotation center by the sliding of the guide post along the guide groove.

[0010] Furthermore, it also includes a diaphragm plate and a fixing cover; the diaphragm plate is fixedly mounted on the fixing base, the turntable is slidably connected to the diaphragm plate, and the fixing cover is detachably connected to the fixing base; the fixing base has a first through hole, the turntable has a second through hole, the diaphragm plate has a third through hole, the fixing cover has a fourth through hole, and multiple aperture blades are provided, which together form an adjustable aperture A with a variable aperture; the first through hole, the second through hole, the third through hole, the adjustable aperture A, and the fourth through hole are coaxially arranged, and the inner diameters of the first through hole, the second through hole, the adjustable aperture A, and the fourth through hole are all larger than the inner diameter of the third through hole.

[0011] Furthermore, the fixing base is provided with a first locking block, the partition is provided with a locking groove, and the fixing cover is provided with a first buckle; the first locking block, the locking groove and the first buckle are arranged correspondingly along the thickness direction of the partition, and the first buckle passes through the locking groove and is connected to the first locking block.

[0012] Furthermore, the fixing base is also provided with a second locking block, and a limiting groove is provided between the first locking block and the second locking block; the diameter plate is provided with an extension portion, and the extension portion is accommodated in the limiting groove; the partition plate is provided with a second buckle and a limiting block, and when the second buckle engages with the second locking block, the limiting block is inserted into the limiting groove and presses against the extension portion.

[0013] Furthermore, the aperture plate is provided with a sliding groove that is slidably connected to the guide post, and an insertion hole that is inserted into and cooperates with the positioning post.

[0014] Furthermore, the present invention also provides a photographic device, including an aperture structure for eliminating guide gaps and preventing blade deformation as described above.

[0015] The beneficial effects of this invention are as follows: This invention shortens the transmission arm by setting the abutment position of the free end of the elastic element on the side of the mating post close to the blade body. Under the premise of constant preload of the elastic element, it helps to reduce the torque acting on the aperture blade, which helps to avoid the overall warping or plastic deformation of the aperture blade caused by the traditional long lever arm arrangement. It significantly improves the durability and reliability of the aperture blade and effectively solves the problem in the existing aperture structure where the elastic element generates a large torque due to the long lever arm acting on the aperture blade, which easily leads to the deformation of the aperture blade and a reduction in service life.

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of the anti-blade deformation aperture structure of the present invention; Figure 2 This is one of the exploded and partially enlarged schematic diagrams of the anti-blade deformation aperture structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the anti-blade deformation aperture structure of the present invention; Figure 4 This is the second exploded view of the anti-blade deformation aperture structure of the present invention; Figure 5 This is the third exploded view of the anti-blade deformation aperture structure of the present invention; Figure 6 This is the second schematic diagram of the anti-blade deformation aperture structure of the present invention; Figure 7 This is the fourth exploded view of the anti-blade deformation aperture structure of the present invention; Figure 8 This is a third schematic diagram and a partially enlarged schematic diagram of the anti-blade deformation aperture structure of the present invention. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] like Figures 1 to 8 The diagram illustrates an aperture structure for eliminating guide gaps and preventing blade deformation, comprising a fixed base 1, a turntable 2, aperture blades 3, and a partition 4. The turntable 2 is rotatably mounted within the fixed base 1. The aperture blades 3 are connected to the turntable 2 via a guide structure 5 and are rotatable relative to the fixed base 1. The partition 4 is located on the side of the aperture blades 3 away from the turntable 2. The aperture blades 3 include a blade body 31 and a mating post 32 connected to the blade body 31. The mating post 32 extends from the blade body 31 toward the partition 4. The partition 4 is provided with an elastic element. The fixed end of the elastic element abuts against the partition 4 to define the installation position, and the free end of the elastic element abuts against the mating post 32 to apply a preload force to the aperture blades 3. The position where the free end of the elastic element abuts against the mating post 32 is located on the side of the mating post 32 closer to the blade body 31. This invention shortens the transmission arm by setting the abutment position of the free end of the elastic element on the side of the mating post close to the blade body. Under the premise of constant preload of the elastic element, it helps to reduce the torque acting on the aperture blade, which helps to avoid the overall warping or plastic deformation of the aperture blade caused by the traditional long lever arm arrangement. It significantly improves the durability and reliability of the aperture blade and effectively solves the problem in the existing aperture structure where the elastic element generates a large torque due to the long lever arm acting on the aperture blade, which easily leads to the deformation of the aperture blade and a reduction in service life.

[0020] Specifically, this invention sets the abutment position of the free end of the elastic element to the side of the mating post 32 near the blade body 31, which significantly shortens the effective lever arm. Under the premise of constant preload, it significantly reduces the bending moment acting on the aperture blade 3, thereby effectively preventing the aperture blade 3 from warping or plastic deformation due to local stress concentration. Conversely, if the abutment position is set at the far end of the mating post 32 away from the blade body 31, the lever arm will be significantly extended, and the bending moment generated under the same preload will increase accordingly. The blade is prone to structural instability and fatigue damage under long-term high bending moment alternating load. This solution solves the problem of easy deformation of the aperture blade 3 from the mechanical root by shortening the lever arm. At the same time, the unidirectional preload continuously output by the elastic element can force the guide surface of the aperture blade 3 to fit tightly against the turntable 2, completely eliminating the mating gap, thereby ensuring the aperture hole contour accuracy and imaging quality.

[0021] Preferably, the free end of the elastic element abuts against the mating post at the connection between the blade body 31 and the mating post 32. This arrangement brings the point of application of the preload extremely close to the root rotation center of the aperture blade 3, thereby shortening the transmission arm to its minimum limit. Under the premise that the elastic element outputs a constant preload, this near-end abutment arrangement can significantly reduce the bending moment and alternating stress acting on the cantilever section of the blade body 31, fundamentally avoiding the elastic warping, stress concentration, or fatigue plastic deformation of thin-walled blades caused by traditional long lever arm arrangements. At the same time, the high overlap between the force-bearing node and the rotation center enables the backlash-eliminating preload to be efficiently converted into a unilateral contact force on the guide pair without additional off-center load, which is beneficial to improving the motion synchronization, aperture profile maintenance accuracy, and long-term service reliability of multiple aperture blades 3 under high-frequency opening and closing conditions.

[0022] Furthermore, a load-bearing boss is provided at the connection between the blade body 31 and the mating column 32. The load-bearing boss and the mating column 32 are coaxially arranged, and the cross-section of the load-bearing boss is larger than the cross-section of the mating column 32. The free end of the elastic element abuts against the load-bearing boss. Furthermore, the preload transmitted by the elastic element is effectively dispersed by the stepped expanded contact surface, which helps to reduce local contact stress and avoid crushing deformation or fatigue cracking of thin-walled plastic material under long-term alternating pressure. At the same time, the coaxially arranged load-bearing boss provides clear radial limit and axial stop reference for the elastic element, which helps to eliminate the risk of slippage and skew of the elastic element during high-frequency opening and closing or equipment vibration. It ensures that the preload vector is strictly transmitted along the blade rotation center without additional eccentric bending moment. This not only ensures the synchronization and trajectory stability of the movement of multiple aperture blades 3, but also greatly improves the torsional stiffness and long-term service reliability of the transmission chain.

[0023] Furthermore, the anti-blade deformation aperture structure also includes a motor, an FPC assembly (flexible printed circuit board), and an input gear. The FPC assembly is electrically connected to the motor to transmit drive signals and power to the motor, and can transmit feedback signals from sensors such as optocouplers back to the main control board of the photography equipment. The output shaft of the motor is connected to the input gear, which meshes with the gear teeth on the turntable 2. When the motor receives the instruction from the FPC assembly and starts working, its output shaft drives the input gear to rotate. The input gear drives the turntable 2 to rotate relative to the fixed seat 1 through meshing. The turntable 2 then drives the aperture blades 3 to swing around the rotation center through the guide structure 5, thereby realizing the precise adjustment of the size of the adjustment hole A (aperture hole).

[0024] like Figures 1 to 8 The partition plate 4 shown is provided with a mounting post 41 and a fixing protrusion 42. The elastic element is a torsion spring 43. The torsion spring 43 is sleeved on the outer peripheral wall of the mounting post 41. The fixing protrusion 42 is provided with a stop notch 44. The fixing end of the torsion spring 43 abuts against the stop notch 44. Furthermore, by setting a mounting post 41 on the partition plate 4 and sleeve the torsion spring 43 on the outer peripheral wall of the mounting post 41, a precise rotation center and radial positioning are provided for the torsion spring 43. This helps to ensure that the torsion spring 43 can be stably twisted around the mounting post 41 during operation, avoiding skewing or falling off, and helps to improve the working reliability of the elastic element.

[0025] Furthermore, the stop notch 44 provided on the fixed protrusion 42 abuts against the fixed end of the torsion spring 43, which can precisely limit the circumferential rotation of the fixed end of the torsion spring 43, preventing the torsion spring 43 from slipping or loosening when subjected to preload or dynamic impact, thereby ensuring that the magnitude and direction of the preload provided by the torsion spring 43 remain constant.

[0026] Furthermore, by cooperating with the stop notch 44 on the mounting post 41 and the fixing protrusion 42, the torsion spring 43 can be quickly installed and fixed without additional fasteners or complex positioning structures. This simplifies the assembly process of the partition 4 and the torsion spring 43 and helps to improve production efficiency.

[0027] like Figures 1 to 8 The mating post 32 shown is arranged parallel to the mounting post 41; the mounting post 41 is provided with a fixed surface corresponding to the fixed end position of the torsion spring 43 and a free surface corresponding to the free end position of the torsion spring 43. The fixed surface is located on the side of the mounting post 41 away from the aperture blade 3, and the free surface is located on the side of the mounting post 41 near the connection between the mating post 32 and the blade body 31. Furthermore, by setting the mating post 32 and the mounting post 41 in parallel, a stable spatial geometric reference is provided for the elastic deformation and torque output of the torsion spring 43. This helps to eliminate the lateral eccentric load and radial wobble tendency generated when the two posts are not arranged in parallel. It also helps to ensure that the torsion spring 43 always moves smoothly along the preset axis during compression or rebound, and avoids lateral slippage or biting interference at the free end, thereby improving the synchronization and smoothness of the aperture transmission process.

[0028] Furthermore, by setting a fixed surface on the mounting post 41 corresponding to the fixed end position of the torsion spring 43 and a free surface corresponding to the free end position of the torsion spring 43, a clear circumferential phase reference and initial angle positioning are provided for the assembly of the torsion spring 43, which helps to eliminate arbitrariness and angle deviation in manual or automated assembly processes.

[0029] Furthermore, the free surface is located on the side of the mounting post 41 near the connection between the mating post 32 and the blade body 31, which can guide the free end of the torsion spring 43 to accurately abut against the area of ​​the mating post 32 near the blade body 31. This helps to shorten the force arm and reduce the torque output, thus avoiding the problem of deformation of the aperture blade 3 due to high torque from the structural layout.

[0030] like Figures 1 to 8 The fixed protrusion 42 shown includes a first protrusion 421 and a second protrusion 422, wherein the first protrusion 421 and the second protrusion 422 are perpendicularly connected to form the stop notch 44; Furthermore, the first protrusion 421 and the second protrusion 422 are perpendicularly connected and form a stop notch 44, thereby forming a right-angle limiting structure. This structure can simultaneously block and limit the fixed end of the torsion spring 43 from two mutually perpendicular directions, which helps to limit the radial and circumferential displacement of the fixed end of the torsion spring 43, making the limiting effect firm and reliable.

[0031] Furthermore, the first protrusion 421 and the second protrusion 422 are vertically spliced ​​to form the stop notch 44, which has a regular structure and can accurately match the shape of the fixed end of the torsion spring 43, so that the two are fully in contact and avoid slipping or moving during the force application process. This helps to ensure that the preload output by the torsion spring 43 remains stable.

[0032] Furthermore, the first protrusion 421 and the second protrusion 422 are integrally connected to form the fixed protrusion 42, which has high overall structural strength and is not prone to deformation or breakage when subjected to the reaction force of the torsion spring 43 for a long time, effectively extending the service life of the fixed protrusion 42 and the entire limiting structure.

[0033] Specifically, the fixing protrusion 42 is formed by the vertical connection of the first protrusion 421 and the second protrusion 422. The two are combined to form an "L" shaped structure and form a stop notch 44 at the joint position, which is used to limit and block the fixed end of the torsion spring 43.

[0034] like Figures 1 to 8 The guide structure 5 shown includes a positioning post 51, a positioning hole 52, a guide post 53, and a guide groove 54. The positioning post 51 is disposed on one of the blade body 31 and the fixed base 1, and the positioning hole 52 is disposed on the other of the blade body 31 and the fixed base 1. The positioning post 51 extends into the positioning hole 52 to define the rotation center of the aperture blade 3. The guide post 53 is disposed on one of the blade body 31 and the turntable 2, and the guide groove 54 is disposed on the other of the blade body 31 and the turntable 2. The guide post 53 passes through the guide groove 54. When the turntable 2 rotates, the aperture blade 3 is driven to rotate around the rotation center by the sliding of the guide post 53 along the guide groove 54. Furthermore, when the turntable 2 rotates, the guide post 53, which passes through the guide groove 54, slides along the guide groove 54. Since the guide groove 54 extends at a specific angle or curve relative to the rotation center, the sliding of the guide post 53 forces the aperture blade 3 to rotate around the positioning post, thereby realizing the conversion of the continuous circular motion of the turntable 2 into the reciprocating oscillation of the aperture blade 3 to meet the need for continuous adjustment of the aperture diameter.

[0035] Furthermore, the power transmission and motion conversion from the turntable 2 to the blade can be completed through only two stages of kinematic pairs: the rotational engagement of the positioning post 51 and the positioning hole 52, and the sliding engagement of the guide post 53 and the guide groove 54. The transmission path is short and the number of parts is small, which helps to reduce the transmission inertia and improve the response speed of the aperture opening and closing.

[0036] Furthermore, there is an unavoidable gap between the guide post 53 and the guide groove 54, and between the positioning post 51 and the positioning hole 52. The present invention can force one side of the guide groove 54 to always be in close contact with the guide post 53 by applying a lateral preload to the blade body through the elastic element, and at the same time make one side of the positioning hole 52 in close contact with the positioning post, thereby eliminating the gap between the two sets of kinematic pairs at the same time and further improving the shape accuracy of the aperture hole.

[0037] Optionally, in some embodiments, the positioning post 51 is disposed on the blade body 31, and the positioning hole 52 is disposed on the fixed base 1; when the turntable 2 drives the aperture blade 3 through the cooperation of the guide post 53 and the guide groove 54, the positioning post 51 on the blade body 31 extends into the positioning hole 52 on the fixed base 1 and can rotate freely in the positioning hole 52; since the central axis of the positioning hole 52 remains fixed relative to the fixed base 1, the outer wall of the positioning post 51 and the inner wall of the positioning hole 52 form a sliding fit, thereby constraining the movement of the aperture blade 3 to rotate around the central axis of the positioning hole 52.

[0038] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the positioning post 51 is disposed on the fixed base 1, and the positioning hole 52 is disposed on the blade body 31; when the turntable 2 rotates, the aperture blade 3 is linked with the turntable 2 through the guide structure 5. At this time, the positioning hole 52 on the blade body 31 is sleeved on the outside of the positioning post 51 on the fixed base 1. The positioning post 51 serves as a fixed shaft core, and the inner wall of the positioning hole 52 slides along the outer wall of the positioning post 51, so that the aperture blade 3 swings around the central axis of the positioning post 51.

[0039] Optionally, in some embodiments, the guide post 53 is disposed on the blade body 31, and the guide groove 54 is disposed on the turntable 2. When the turntable 2 rotates, the guide post 53 on the blade body 31 passes through the guide groove 54 on the turntable 2. Since the guide groove 54 rotates together with the turntable 2, the guide post 53 is forced to slide along the extension direction of the guide groove 54 under the push of the side wall of the guide groove 54, thereby driving the aperture blade 3 to swing around the rotation center defined by the positioning post 51 and the positioning hole 52.

[0040] Furthermore, as a preferred embodiment of the invention and not a limitation thereof, the guide post 53 is disposed on the turntable 2 and the guide groove 54 is disposed on the blade body 31; when the turntable 2 rotates, the guide post 53 on it passes into the guide groove 54 on the blade body 31 and slides along the inner wall of the guide groove 54. Since the guide groove 54 extends in a specific curve relative to the rotation center of the blade body 31, the sliding of the guide post 53 forces the blade body 31 to swing around the rotation center.

[0041] like Figures 1 to 8 The diagram also includes a diaphragm plate 6 and a fixing cover 7; the diaphragm plate 6 is fixedly mounted on the fixing base 1, the turntable 2 is slidably connected to the diaphragm plate 6, and the fixing cover 7 is detachably connected to the fixing base 1; the fixing base 1 has a first through hole 101, the turntable 2 has a second through hole 201, the diaphragm plate 6 has a third through hole 601, the fixing cover 7 has a fourth through hole 701, and multiple aperture blades 3 are provided, which together form an adjustable aperture A; the first through hole 101, the second through hole 201, the third through hole 601, the adjustable aperture A, and the fourth through hole 701 are coaxially arranged, and the inner diameters of the first through hole 101, the second through hole 201, the adjustable aperture A, and the fourth through hole 701 are all larger than the inner diameter of the third through hole 601; Furthermore, the first through hole 101, the second through hole 201, the third through hole 601, the adjustment hole A, and the fourth through hole 701 are coaxially arranged, so that external light can pass through each through hole and the adjustment hole A in sequence along the same optical axis, avoiding light vignetting or dark corners caused by hole axis misalignment, which helps to ensure the imaging quality of the photographic equipment.

[0042] Furthermore, since the inner diameters of the first through hole 101, the second through hole 201, the adjustment hole A, and the fourth through hole 701 are all larger than the inner diameter of the third through hole 601, the third through hole 601 on the aperture plate 6 becomes the smallest aperture component in the entire optical path, thus limiting the maximum light-passing aperture of the aperture structure; the inner diameters of the through holes of other components are all larger than this minimum aperture, so they will not cause additional obstruction to the light in the fully open state, which helps to ensure that the aperture adjustment range can be fully utilized.

[0043] Furthermore, the caliper plate 6 is fixedly mounted on the fixed base 1, and the turntable 2 is slidably connected to the caliper plate 6, so that the turntable 2 obtains a flat and reliable support plane during rotation. At the same time, the surface precision of the caliper plate 6 is used to control the axial movement of the turntable 2, thereby improving the stability and positional accuracy of the turntable 2 rotation.

[0044] like Figures 1 to 8 The fixed base 1 shown is provided with a first locking block 11, the partition 4 is provided with a locking groove 45, and the fixed cover 7 is provided with a first buckle 71; the first locking block 11, the locking groove 45 and the first buckle 71 are arranged correspondingly along the thickness direction of the partition 4, and the first buckle 71 passes through the locking groove 45 and is connected to the first locking block 11 in a buckle connection. Furthermore, the first buckle 71 passes through the slot 45 and is snapped into the first buckle block 11, so that the fixing cover 7 can press and lock the partition 4 onto the fixing base 1 at one time, without the need to set separate fasteners for the partition 4, which helps to simplify the assembly layers and improve the assembly efficiency of the overall structure.

[0045] Furthermore, the slot 45 on the partition 4 is correspondingly arranged with the first latch 11 and the first buckle 71 along the thickness direction, so that the first buckle 71 can pass through the partition 4 without obstruction and reach the first latch 11 on the fixed seat 1. This helps to avoid interference caused by the partition 4 during the assembly process and helps to ensure the reliability of the buckle connection.

[0046] Furthermore, replacing traditional screw fastening with snap-fit ​​connections not only reduces the types and number of parts, but also enables quick press-to-assemble without the need for tools such as screwdrivers, thus helping to reduce manufacturing costs.

[0047] like Figures 1 to 8 The fixed base 1 shown is also provided with a second locking block 12, and a limiting groove 13 is provided between the first locking block 11 and the second locking block 12; the diameter plate 6 is provided with an extension 61, and the extension 61 is accommodated in the limiting groove 13; the partition plate 4 is provided with a second buckle 46 and a limiting block 47. When the second buckle 46 is engaged with the second locking block 12, the limiting block 47 is inserted into the limiting groove 13 and presses against the extension 61; Furthermore, the partition 4 is locked onto the fixed base 1 by the second buckle 46 engaging with the second buckle block 12; at the same time, the limiting block 47 is inserted into the limiting groove 13 and presses against the extension 61, thereby pressing and fixing the extension 61 of the diameter plate 6 into the limiting groove 13. One assembly action simultaneously completes the locking of the partition 4 and the pressing of the diameter plate 6, which is beneficial to improving assembly efficiency.

[0048] Furthermore, after the limiting block 47 is inserted into the limiting groove 13, it directly presses against the extension 61, thereby restricting the movement of the aperture plate 6 along the thickness direction (optical axis direction), avoiding displacement of the aperture plate 6 due to vibration or gravity, which helps to ensure the coaxiality of the third through hole 601 with the optical axis, thereby maintaining stable imaging quality.

[0049] Furthermore, the limiting groove 13 formed between the first locking block 11 and the second locking block 12 not only provides an insertion space for the limiting block 47, but also provides circumferential and radial constraints on the extension 61 housed therein, preventing the diameter plate 6 from rotating or shifting on the fixed seat 1, which helps to ensure that the relative position of the diameter plate 6 and the fixed seat 1 remains constant.

[0050] like Figures 1 to 8 The aperture plate 6 shown is provided with a sliding groove 62 that is slidably connected to the guide post 53, and an insertion hole 63 that is inserted into the positioning post 51; Furthermore, the insertion hole 63 and the positioning post 51 are inserted into each other, which can accurately position the aperture plate 6 on the fixed base 1, restrict the translation and rotation of the aperture plate 6 in the radial plane, thereby ensuring the coaxiality of the third through hole 601 with the optical axis and avoiding light vignetting or dark corners in imaging caused by the positional displacement of the aperture plate 6.

[0051] Furthermore, the sliding groove 62 is slidably connected to the guide post 53, so that the guide post 53 can slide freely along the sliding groove 62 when it moves with the turntable 2 or the aperture blade 3, without colliding or getting stuck with the aperture plate 6. This helps to ensure that the movement stroke of the guide post 53 is not affected, thereby ensuring that the aperture blade 3 can open and close smoothly.

[0052] Furthermore, the extension direction of the sliding groove 62 matches the movement trajectory of the guide post 53. During the sliding process, the guide post 53 is constrained by the side wall of the sliding groove 62, which can further limit the movement trajectory of the guide post 53. This is beneficial to improving the consistency and repeatability of the movement of the aperture blade 3 and helps to stabilize the shape of the adjustment hole A formed by the encirclement of multiple blades.

[0053] like Figures 1 to 8 The photographic device shown includes an aperture structure for eliminating guide gaps and preventing blade deformation as described above; Specifically, the photographic equipment employing the aforementioned anti-blade deformation aperture structure that eliminates guide clearance can utilize the short lever arm arrangement formed by the free end of the elastic element abutting against the root of the mating post 32. This effectively eliminates guide clearance and ensures the accuracy of the aperture hole shape while significantly reducing the bending moment acting on the blade body 31, preventing the aperture blade 3 from warping or undergoing plastic deformation due to long-term stress, thereby significantly improving the stability of aperture adjustment and imaging quality. At the same time, the compact design, such as snap-fit ​​connection and plug-in positioning, simplifies the assembly process and helps to achieve ultra-thin, lightweight, and long-life photographic equipment.

[0054] Specifically, the fixed base 1, turntable 2, aperture plate 6, aperture blades 3, partition plate 4, and fixed cover 7 are connected in sequence; wherein, the turntable 2 is installed inside the fixed base 1, the insertion hole 63 on the aperture plate 6 is inserted into the positioning post 51 on the fixed base 1, and the sliding groove 62 on the aperture plate 6 is slidably connected to the guide post 53 on the turntable 2; multiple aperture blades 3 are arranged on the side of the aperture plate 6 away from the turntable 2, and the guide post 53 on the turntable 2 passes through the sliding groove 62 on the aperture plate 6 and the guide groove 54 on the aperture blades 3 in sequence; the mounting post 41 on the partition plate 4 has a hollow structure, and the mounting post 41 is inserted into the positioning post 51 on the fixed base 1. When the partition plate 4 is installed on the fixed base 1, the aperture blades... The mating post 32 on the plate 3 is located near the mounting post 41. At this time, the elastic element can be sleeved on the outer peripheral wall of the mounting post 41, and the fixed end of the elastic element abuts against the stop notch 44 on the partition plate 4. The free end of the elastic element abuts against the side of the mating post 32 near the blade body 31. Through this assembly method, the elastic element is located on the side of the aperture blade 3 away from the turntable 2, so that the elastic element can be installed after the blade and other internal components are in place. This avoids the problems of interference or difficulty in controlling the pre-tightening force caused by the pre-assembly of the elastic element in the traditional structure, thus significantly improving the assembly difficulty and increasing production efficiency. Finally, the fixing cover 7 is connected to the fixing seat 1 to complete the assembly of the entire aperture structure.

[0055] The working principle is as follows: Specifically, after the motor receives the drive signal through the FPC group, its output shaft drives the input gear to rotate, and the input gear drives the turntable 2 to rotate relative to the fixed seat 1. The guide post 53 on the turntable 2 passes through the sliding groove 62 on the aperture plate 6 and the guide groove 54 on the aperture blade 3 in sequence. As the turntable 2 rotates, the guide post 53 slides along the guide groove 54, forcing the aperture blade 3 to swing around the rotation center defined by the cooperation of the positioning post 51 and the positioning hole 52. Multiple aperture blades 3 move synchronously, thereby changing the aperture size of the adjustment hole A. During this process, the torsion spring 43 sleeved on the mounting post 41 of the partition plate 4 has its fixed end abutting against the stop notch 44 of the fixed protrusion 42, and its free end abutting against the side of the aperture blade 3 mating post 32 near the blade body 31 (at the root of the short lever arm), applying a continuous lateral preload force to the aperture blade 3, forcing one side of the guide groove 54 to always be in close contact with the guide post 53 to eliminate the mating gap. At the same time, due to the significant shortening of the lever arm, Under the same preload, the bending moment acting on the blade body 31 is significantly reduced, avoiding blade warping or plastic deformation that is easily caused by traditional long lever arm structures. Furthermore, by first assembling the fixed base 1, turntable 2, aperture plate 6, aperture blade 3, and partition plate 4 in sequence, and then fitting the torsion spring 43 onto the outer peripheral wall of the mounting post 41 and abutting against the stop notch 44 and the mating post 32 respectively, the elastic element is located on the side of the aperture blade 3 away from the turntable 2, improving assembly accessibility and increasing production efficiency. Finally, the fixed cover 7 is locked to the fixed base 1 by passing through the slot 45 of the partition plate 4 with a buckle. The light passes through the first through hole 101, the second through hole 201, the third through hole 601, the adjustment hole A, and the fourth through hole 701, which are set coaxially. The inner diameter of the third through hole 601 is the smallest to limit the maximum light transmission aperture, and the inner diameters of the other through holes are all larger than the third through hole 601 to avoid vignetting. Finally, high-precision, low-deformation, and long-life aperture adjustment is achieved.

[0056] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A blade deformation prevention aperture structure for eliminating a guide gap, comprising a fixing base (1), a rotating disc (2), an aperture blade (3) and a partition plate (4), characterized in that: The turntable (2) is rotatably mounted in the fixed base (1). The aperture blade (3) is connected to the turntable (2) via a guide structure (5) and can rotate relative to the fixed base (1). The partition plate (4) is located on the side of the aperture blade (3) away from the turntable (2). The aperture blade (3) includes a blade body (31) and a mating post (32) connected to the blade body (31). The mating post (32) extends from the blade body (31) toward the partition plate (4). The partition plate (4) is provided with an elastic element. The fixed end of the elastic element abuts against the partition plate (4) to limit the installation position. The free end of the elastic element abuts against the mating post (32) to apply a preload to the aperture blade (3). The position where the free end of the elastic element abuts against the mating post (32) is located on the side of the mating post (32) closer to the blade body (31).

2. The anti-blurring diaphragm structure according to claim 1, wherein: The partition (4) is provided with a mounting post (41) and a fixing protrusion (42). The elastic element is a torsion spring (43). The torsion spring (43) is sleeved on the outer peripheral wall of the mounting post (41). The fixing protrusion (42) is provided with a stop notch (44). The fixed end of the torsion spring (43) abuts against the stop notch (44).

3. The anti-blurring diaphragm structure according to claim 2, wherein: The mating post (32) is arranged parallel to the mounting post (41); the mounting post (41) is provided with a fixed surface corresponding to the fixed end position of the torsion spring (43) and a free surface corresponding to the free end position of the torsion spring (43). The fixed surface is located on the side of the mounting post (41) away from the aperture blade (3), and the free surface is located on the side of the mounting post (41) near the connection between the mating post (32) and the blade body (31).

4. The anti-blade deformation aperture structure for eliminating guide gaps according to claim 2, characterized in that: The fixing protrusion (42) includes a first protrusion (421) and a second protrusion (422), the first protrusion (421) and the second protrusion (422) being perpendicularly connected to form the stop notch (44).

5. The anti-blade deformation aperture structure for eliminating guide clearance according to claim 1, characterized in that: The guide structure (5) includes a positioning post (51), a positioning hole (52), a guide post (53), and a guide groove (54). The positioning post (51) is disposed on one of the blade body (31) and the fixed seat (1), and the positioning hole (52) is disposed on the other of the blade body (31) and the fixed seat (1). The positioning post (51) extends into the positioning hole (52) to define the rotation center of the aperture blade (3). The guide post (53) is disposed on one of the blade body (31) and the turntable (2), and the guide groove (54) is disposed on the other of the blade body (31) and the turntable (2). The guide post (53) passes through the guide groove (54). When the turntable (2) rotates, the aperture blade (3) is driven to rotate around the rotation center by the sliding of the guide post (53) along the guide groove (54).

6. The anti-blade deformation aperture structure for eliminating guide clearance according to claim 5, characterized in that: It also includes a caliber plate (6) and a fixing cover (7); the caliber plate (6) is fixedly mounted on the fixing base (1), the turntable (2) is slidably connected to the caliber plate (6), and the fixing cover (7) is detachably connected to the fixing base (1); the fixing base (1) is provided with a first through hole (101), the turntable (2) is provided with a second through hole (201), the caliber plate (6) is provided with a third through hole (601), and the fixing cover (7) is provided with a fourth through hole (701). The aperture blades (3) are provided in multiple ways, and the multiple aperture blades (3) surround to form an adjustable aperture A with a variable aperture; the first through hole (101), the second through hole (201), the third through hole (601), the adjustable aperture A and the fourth through hole (701) are coaxially arranged, and the inner diameters of the first through hole (101), the second through hole (201), the adjustable aperture A and the fourth through hole (701) are all larger than the inner diameter of the third through hole (601).

7. The anti-blurring diaphragm structure according to claim 6, wherein: The fixing base (1) is provided with a first locking block (11), the partition (4) is provided with a locking groove (45), and the fixing cover (7) is provided with a first buckle (71); the first locking block (11), the locking groove (45) and the first buckle (71) are arranged correspondingly along the thickness direction of the partition (4), and the first buckle (71) passes through the locking groove (45) and is buckled to the first locking block (11).

8. The anti-blurring diaphragm structure according to claim 7, wherein: The fixed base (1) is also provided with a second locking block (12), and a limiting groove (13) is provided between the first locking block (11) and the second locking block (12); the diameter plate (6) is provided with an extension (61), and the extension (61) is accommodated in the limiting groove (13); the partition plate (4) is provided with a second buckle (46) and a limiting block (47). When the second buckle (46) and the second locking block (12) are engaged, the limiting block (47) is inserted into the limiting groove (13) and presses against the extension (61).

9. The anti-blurring diaphragm structure according to claim 6, wherein: The caliber plate (6) is provided with a sliding groove (62) that is slidably connected to the guide post (53) and an insertion hole (63) that is inserted into the positioning post (51).

10. A photographic apparatus characterized by comprising: Including a blade deformation prevention aperture structure for eliminating guide gaps as described in any one of claims 1-9.

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