Lens aperture adjusting device

Abstract

The application belongs to the technical field of electronic equipment, and particularly relates to a lens aperture adjusting device, which comprises a base, a movable seat, a plurality of blades, and a driving mechanism. The movable seat is rotatably arranged on the base along an axis, and the movable seat and the base are provided with a lens avoiding hole matched with a lens along the axis. The plurality of blades are annularly arranged above the base and the movable seat around the lens avoiding hole, and the radially outer sides of the plurality of blades are rotatably connected to the base along a direction parallel to the axis. The plurality of blades are annularly arranged and the radially inner sides thereof enclose a diameter-adjustable aperture adjusting hole. When the movable seat is rotated along the axis by the driving mechanism, the diameter of the aperture adjusting hole gradually increases or decreases. The diameter-adjustable aperture adjusting hole is formed by the plurality of blades. When the movable seat is rotated by the driving mechanism, the blades rotate, the aperture size can be better adjusted, and the variable aperture purpose is achieved.

Description

Technical Field

[0001] This invention belongs to the field of electronic equipment technology, and specifically relates to a lens aperture adjustment device. Background Technology

[0002] Regarding camera aperture, in bright light, a smaller aperture allows for greater depth of field and sharper images, while in low light, a larger aperture increases light intake, resulting in cleaner images with higher exposure and lower noise. In the field of electronic devices, cameras typically cannot adjust their aperture size. This prevents them from adapting to various shooting environments, leading to overexposure in bright sunlight and underexposure, low light, high noise, and loss of detail at night. Therefore, a physically variable aperture is crucial for meeting users' photography needs.

[0003] In view of this, those skilled in the art need to develop new types of variable apertures in order to overcome the aforementioned technical problems. Summary of the Invention

[0004] The present invention addresses the aforementioned technical problems by providing a lens aperture adjustment device.

[0005] A lens aperture adjustment device, comprising:

[0006] Base;

[0007] A movable seat is rotatably mounted on the base about an axis, and the movable seat and the base are provided with lens clearance holes along the axis to cooperate with the lens.

[0008] A plurality of blades are arranged circumferentially around the lens clearance hole and located above the base and the movable seat. The radially outer sides of the plurality of blades are rotatably connected to the base in a direction parallel to the axis. The plurality of blades are arranged in a ring shape and the radially inner sides form an aperture adjustment hole with an adjustable diameter. When the movable seat rotates around the axis, causing the plurality of blades to rotate, the diameter of the aperture adjustment hole gradually increases or decreases.

[0009] The driving mechanism is a piezoelectric mechanism, which drives the movable seat to rotate around an axis.

[0010] Optionally, the bottom end of the movable seat is provided with a mounting hole;

[0011] The piezoelectric mechanism includes a piezoelectric block, a friction rod, and a movable pin. The piezoelectric block is mounted on the base, and the friction rod is fixedly connected to the piezoelectric block. The friction rod is connected to the movable pin, which extends into the mounting hole. When the piezoelectric block moves, the friction rod moves linearly, driving the movable pin to push the movable seat to rotate within the mounting hole.

[0012] Optionally, the piezoelectric mechanism further includes a collar, a plug plate, and a movable component. The collar is sleeved on the friction rod and is an open collar. The plug plate is respectively provided at the two open ends of the collar. The plug plate is inserted into the plug hole of the movable component and clamps the friction rod. The movable pin is provided on the movable component.

[0013] Optionally, the piezoelectric mechanism further includes a counterweight block, which is fixedly connected to the piezoelectric block and located on the side away from the friction rod. The counterweight block is mounted on the base, and the piezoelectric block is mounted on the base via the counterweight block.

[0014] Optionally, the axial direction of the movable pin is parallel to the axis, the linear motion direction of the friction rod is parallel to the tangential direction when the movable seat rotates, and the length direction of the mounting hole is consistent with the linear motion direction of the friction rod.

[0015] Optionally, the base is provided with a mounting groove, and the piezoelectric mechanism is installed in the mounting groove.

[0016] Optionally, the piezoelectric block is powered by an external circuit or by a built-in circuit within the base.

[0017] Optionally, a fixing hole is provided on the radial outer side of the blade, a support protrusion is provided on the base, the movable seat ring is provided on the outer side of the support protrusion, and a fixing pin is provided at the top of the support protrusion, the fixing pin being rotatably connected to the fixing hole.

[0018] Optionally, the blade is provided with a movable hole, and the top of the movable seat is provided with a movable pin. The movable pin is connected to the movable hole on the blade. When the movable seat rotates, the movable pin drives the blade to rotate around a direction parallel to the axis, thereby causing the diameter of the aperture adjustment hole to change.

[0019] Optionally, two adjacent blades are staggered and stacked.

[0020] Optionally, the radially inner end of the blade is a wedge-shaped portion, and at least one of the two sidewalls of the wedge-shaped portion is an arc-shaped surface and close to the lens clearance hole, so that the plurality of blades form a near-circular aperture adjustment hole.

[0021] Optionally, the movable hole is an arc-shaped hole.

[0022] Optionally, the curvature of the arc-shaped hole is consistent with the curvature of the arc-shaped surface.

[0023] Optionally, the movable hole is an arc-shaped hole extending along the involute direction of the lens clearance hole.

[0024] Optionally, the base, the supporting protrusion, and the movable seat are all annular structures.

[0025] Optionally, an aperture disk is mounted on the fixing pin at the top of the support protrusion. The aperture disk is located between the support protrusion and several blades, and the central hole of the aperture disk is an aperture defining hole.

[0026] Optionally, the base edge is provided with a plurality of fixed protrusions along the circumferential direction, the fixed protrusions are located on the outside of the movable seat, and the top of the fixed protrusions is provided with a fixed post;

[0027] The lens aperture adjustment device also includes a top cover, which is fixedly connected to the fixed post. An movable space is formed between the top cover and the base. The top cover, the movable base, and the base are provided with lens clearance holes that cooperate with the lens along the axis.

[0028] The movable seat, the plurality of blades, and the drive mechanism are all disposed within the movable space, and the movable seat and the plurality of blades can rotate within the movable space.

[0029] Optionally, some or all of the fixed protrusions are provided with grooves on their inner sides, and some or all of the grooves are provided with balls. When the movable seat is installed on the base, one inner wall of the movable seat contacts the balls and rotates under the action of the drive mechanism.

[0030] Optionally, the ball is disposed in the groove on one side of the base, and the drive mechanism is located on the base between two adjacent fixed protrusions having the ball.

[0031] Optionally, each of the grooves is provided with a ball bearing, and the drive mechanism is located on the base between any two adjacent fixed protrusions.

[0032] Beneficial effects: The present invention has at least one or more of the following advantages:

[0033] 1. The present invention uses a number of blades to form an adjustable aperture hole. When the drive mechanism drives the movable seat to rotate, the blades rotate with it, which can effectively adjust the size of the aperture and achieve the purpose of variable aperture.

[0034] 2. The driving mechanism of this invention employs a piezoelectric mechanism. It utilizes the principle that the piezoelectric block, when energized, extends, causing the friction rod to move linearly. This, in turn, drives the movable seat to rotate via a movable pin within a mounting hole at the bottom of the movable seat, thus achieving the rotational movement of the movable seat. Compared to traditional drive devices using a magnet and coil combination, where the magnet and coil generate a magnetic field that may interfere with other electronic components inside the phone, the piezoelectric mechanism avoids interference with other components such as the lens motor. Furthermore, the piezoelectric mechanism is smaller overall than the electromagnetic structure of a magnet and coil, resulting in a simpler and more compact structure, thus reducing the overall size of the lens aperture adjustment device. Additionally, due to its operating characteristics, the piezoelectric mechanism consumes less power than the electromagnetic structure, while providing a significantly greater driving force.

[0035] 3. The central hole of the aperture disk of the present invention is the aperture hole with the largest range. The aperture disk limits the maximum range of the aperture hole. At the same time, the aperture disk has a certain wear resistance to prevent the movement of the blades from rubbing against the base.

[0036] 4. The present invention installs ball bearings on the inner side of the fixed protrusion, which can reduce the frictional force when the movable seat rotates. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of one structure of the present invention;

[0038] Figure 2 for Figure 1 Exploded view;

[0039] Figure 3 for Figure 1 Further exploded view;

[0040] Figure 4 for Figure 3 Further exploded view;

[0041] Figure 5 This is a diagram showing the positional relationship between the base and the movable seat of the present invention;

[0042] Figure 6 for Figure 5 Exploded view;

[0043] Figure 7 for Figure 6 Another perspective illustration;

[0044] Figure 8 This is an exploded view showing the positional relationship between the base and the piezoelectric mechanism of the present invention.

[0045] Figure 9 This is an exploded view of one structure of the piezoelectric mechanism of the present invention;

[0046] Figure 10 for Figure 9 Another perspective diagram. Detailed Implementation

[0047] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are only for illustrating the essential spirit of the technical solution of the present invention.

[0048] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0049] Throughout this specification, references to "an embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in an embodiment" or "an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0050] In the following description, in order to clearly demonstrate the structure and working method of the present invention, a number of directional terms will be used. However, terms such as "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", and "down" should be understood as convenient terms and not as limiting terms.

[0051] Reference Figures 1 to 10 This invention provides a lens aperture adjustment device, which is fitted onto a lens to adjust the aperture size. The lens aperture adjustment device includes a base 10, a movable seat 20, several blades 30, and a drive mechanism 40.

[0052] The base 10 is used to fix it to the housing of the lens motor.

[0053] The movable base 20 is rotatably mounted on the base 10 around an axis. Both the movable base 20 and the base 10 have a lens clearance hole 50 along their axis, which mates with the lens on the lens motor, allowing light to enter the lens. The lens clearance hole 50 is typically circular. The lens clearance hole 50 is located at the center of the movable base 20 and the base 10, and this axis is the center line of the combined base 10 and movable base 20, which is also the axis of the lens clearance hole 50. Figure 5 Centerline A in the vertical direction.

[0054] Several blades 30 are arranged circumferentially around the lens clearance aperture 50 and located above the base 10 and the movable seat 20. The radially outer sides of the blades 30 are rotatably connected to the base 10 in a direction parallel to the axis. The blades 30 are arranged in a ring shape, and their radially inner sides form an adjustable aperture adjustment aperture 30a. The movable seat 20 is connected to each blade 30. The drive mechanism 40 drives the movable seat 20 to rotate around the axis, thereby causing the blades 30 to rotate. As the blades 30 rotate, their radially inner sides move away from or closer to the axis, causing the diameter of the aperture adjustment aperture 30a to gradually increase or decrease. Because the opening size of the aperture adjustment aperture 30a changes, the light entering the lens changes accordingly, thus achieving lens obstruction and aperture adjustment.

[0055] In one embodiment, reference is made to Figure 7 The bottom of the movable base 20 is provided with mounting holes 21.

[0056] Reference Figures 8 to 10 The drive mechanism 40 adopts a piezoelectric mechanism, which includes a piezoelectric block 41, a friction rod 42, and a movable pin 43. The piezoelectric block 41 is mounted on the base 10, and the friction rod 42 is fixedly connected to the piezoelectric block 41. The friction rod 42 is connected to the movable pin 43, which extends into the mounting hole 21. When the friction rod 42 moves with the piezoelectric block 41, it moves linearly, driving the movable pin 43 to push the movable seat 20 to rotate within the mounting hole 21.

[0057] The driving mechanism 40 of this invention employs a piezoelectric mechanism. When the piezoelectric block 41 is energized, it stretches, causing the friction rod 42 to move linearly. This, in turn, drives the movable seat 20 to rotate via the mounting hole 21 at the bottom of the movable seat 20 through the movable pin 43, thus achieving the rotational movement of the movable seat 20. Compared to traditional drive devices using a magnet and coil combination, where the magnet and coil generate a magnetic field that may interfere with other electronic components inside the phone, the piezoelectric mechanism avoids interference with other components such as the lens motor. Secondly, the overall volume of the piezoelectric mechanism is smaller than that of the electromagnetic structure of the magnet and coil, resulting in a simpler and more compact structure, thus reducing the overall size of the lens aperture adjustment device. Furthermore, due to its operating characteristics, the piezoelectric mechanism consumes less power than the electromagnetic structure, while providing a much greater driving force.

[0058] In one embodiment, reference is made to Figures 8 to 10The piezoelectric mechanism also includes a collar 44, a plug plate 45, and a movable part 46. The collar 44 is sleeved on the outside of the friction rod 42. The collar 44 is an open collar. The two open ends of the collar 44 are respectively provided with plug plates 45. The plug plates 45 are inserted into the plug holes 461 of the movable part 46 and clamp the friction rod 42. The movable pin 43 is provided on the movable part 46.

[0059] With the above design, the movable pin 43 is indirectly connected to the friction rod 42. When the friction rod 42 moves with the piezoelectric block 41, the movable member 46 also moves linearly, causing the movable pin 43 at the top of the movable member 46 to push the movable seat 20 to rotate in the mounting hole 21 at the bottom of the movable seat 20, thereby realizing the rotation of the movable seat 20.

[0060] The insertion hole 461 adopts a T-shaped insertion hole, and the bottom of the insertion hole 461 is an open structure. The inner wall shape of the insertion hole 461 matches the opening of the insertion plate 45 and the collar 44 to which it is inserted.

[0061] Of course, the connection between the movable pin 43 and the friction rod 42 can also be achieved by other structures, as long as it can drive the movable pin 43 to push the movable seat 20 to rotate in the mounting hole 21 when the friction rod 42 moves in a straight line.

[0062] In one embodiment, reference is made to Figures 8 to 10 The piezoelectric mechanism also includes a counterweight 47, which is fixedly connected to the piezoelectric block 41 and located on the side away from the friction rod 42. The counterweight 47 is mounted on the base 10, and the piezoelectric block 41 is mounted on the base 10 via the counterweight 47.

[0063] The counterweight 47, piezoelectric block 41 and friction rod 42 are stacked sequentially along the linear motion direction of the friction rod 42.

[0064] In one embodiment, the axial direction of the movable pin 43 is parallel to the axis, that is, the axial direction of the movable pin 43 is vertical. The linear motion direction of the friction rod 42 is parallel to the tangential direction when the movable seat 20 rotates, and the length direction of the mounting hole 21 is consistent with the linear motion direction of the friction rod 42.

[0065] In one embodiment, reference is made to Figure 8 The base 10 is provided with a mounting groove 11, and the drive mechanism 40, i.e. the piezoelectric mechanism, is installed in the mounting groove 11.

[0066] In one embodiment, the piezoelectric block 41 is powered by an external circuit or by a built-in circuit within the base 10.

[0067] In one embodiment, reference is made to Figures 1 to 4 A fixing hole 31 is provided on the radial outer side of the blade 30.

[0068] Reference Figures 1 to 8 The base 10 is provided with a support protrusion 12, and the movable seat 20 is arranged around the outside of the support protrusion 12. The top of the support protrusion 12 is provided with a fixing pin 13, which is rotatably connected to the fixing hole 31, so that the radial outer side of the blade 30 is rotatably connected to the support protrusion 12 of the base 10 around the axial direction (that is, the up and down direction) of the fixing pin 13.

[0069] The number of fixing pins 13 is not less than the number of blades 30, so that one blade 30 can be rotatably connected to a corresponding fixing pin 13. For example, when there are six blades 30, the number of fixing pins 13 is also six.

[0070] Several fixed pins 13 are preferably evenly arranged circumferentially at the top of the support protrusion 12.

[0071] The fixing hole 31 is a circular hole that rotatably connects with the fixing pin 13.

[0072] In one embodiment, reference is made to Figures 1 to 4 The blade 30 is provided with a movable hole 32, and the top of the movable seat 20 is provided with a movable pin 22. The movable pin 22 is connected to the movable hole 32 on the blade 30. When the movable seat 20 rotates, the movable pin 22 drives the blade 30 to rotate around a direction parallel to the axis, thereby causing the diameter of the aperture adjustment hole 30a to change.

[0073] The number of movable pins 22 is not less than the number of blades 30, so that one blade 30 can be connected to a corresponding movable pin 22. For example, when there are six blades 30, the number of movable pins 22 is also six.

[0074] A number of movable pins 22 are preferably evenly arranged circumferentially at the top of the movable seat 20.

[0075] In one embodiment, reference is made to Figures 1 to 4 The adjacent blades are staggered and overlapped.

[0076] For example, when there are six blades 30, three blades 30 spaced apart are located below three other blades 30 spaced apart, and there is partial overlap between adjacent blades 30.

[0077] In one embodiment, reference is made to Figure 2 The radially inner end of the blade 30 is a wedge-shaped portion 33. At least one of the two sidewalls of the wedge portion 33 is an arc-shaped surface 33a and is close to the lens clearance hole 50, so that a number of blades 30 form a near-circular aperture adjustment hole 30a.

[0078] In one embodiment, the movable hole 32 is an arc-shaped hole.

[0079] The curvature of the arc-shaped hole is preferably consistent with the curvature of the arc-shaped surface.

[0080] The movable hole 32 is more preferably an arc-shaped hole extending along the involute direction of the lens clearance hole 50.

[0081] In one embodiment, the base 10, the support protrusion 12, and the movable seat 20 are all annular structures.

[0082] Therefore, the movable seat 20 is fitted around the outside of the support protrusion 12 and located on the base 10, and the movable seat 20 can rotate on the base 10 around the outside of the support protrusion 12.

[0083] Of course, the base 10, the support protrusion 12 and the movable seat 20 can also be other structures, such as a polygonal outer contour. However, the base 10, the support protrusion 12 and the movable seat 20 are all provided with corresponding holes in the middle to form the lens clearance hole 50.

[0084] In one embodiment, the base 10 and the support protrusion 12 are integrally formed.

[0085] In one embodiment, reference is made to Figures 2 to 4 An aperture disk 60 is mounted on a fixed pin 13 at the top of the support protrusion 12. The aperture disk 60 is located between the support protrusion 12 and several blades 30. The central hole of the aperture disk 60 is the aperture limiting hole.

[0086] The central hole of the aperture disk 60 is the aperture with the largest range, and the aperture disk 60 limits the maximum range of the aperture; at the same time, the aperture disk 60 has a certain wear resistance to prevent the movement of the blades 30 from rubbing against the base 10.

[0087] In one embodiment, reference is made to Figures 2 to 8 The base 10 has several fixed protrusions 14 arranged circumferentially along its edge. The fixed protrusions 14 are located on the outside of the movable seat 20, and a fixed post 15 is provided at the top of the fixed protrusions 14.

[0088] The lens aperture adjustment device also includes a top cover 70, which is fixedly connected to the fixing post 15, and a movable space is formed between the top cover 70 and the base 10. The top cover 70, the movable seat 20, and the base 10 are provided with lens clearance holes 50 along the axis to cooperate with the lens. That is to say, the top cover 70 also has a top cover hole in the middle, and the diameter of the top cover hole is not smaller than the diameter of the lens clearance hole 50.

[0089] The movable seat 20, several blades 30 and the drive mechanism 40 are all arranged in the movable space, and the movable seat 20 and several blades 30 can rotate in the movable space.

[0090] One or more fixing posts 15 at the top of the fixing protrusion 14 can be set as needed.

[0091] In one embodiment, reference is made to Figure 6 and Figure 8 The inner side of some or all of the fixed protrusions 14 is provided with grooves, and some or all of the grooves are provided with balls 80. When the movable seat 20 is installed on the base 10, one side of the inner wall of the movable seat 20 contacts the balls 80 and rotates under the action of the drive mechanism 40.

[0092] The design of ball bearing 80 can reduce the friction when the movable seat 20 rotates.

[0093] In one embodiment, reference is made to Figure 6 and Figure 8 The ball bearing 80 is disposed in a groove on one side of the base 10, and the drive mechanism 40 is located on the base 10 between two adjacent fixed protrusions 14 with the ball bearing 80.

[0094] In this embodiment, a groove and ball bearing 80 are provided on one side of the base, while the other side has no ball bearing 80, or no groove and ball bearing 80 are provided. This allows the movable seat 20 to be positioned close to the ball bearing 80 under the limiting action of the movable pin 43, realizing the rotational action after the movable seat 20 abuts against the ball bearing 80. This design can reduce the number of ball bearings 80 and reduce the overall production cost.

[0095] For example, Figure 8 As shown, four fixed protrusions 14 are arranged circumferentially along the edge of the base 10. Each fixed protrusion 14 has a groove on its inner side. A ball bearing 80 is installed in two adjacent grooves, while no ball bearing 80 is installed in the other two grooves. The mounting groove 11 of the drive mechanism 40 is located between the two grooves where the ball bearing 80 is installed.

[0096] Of course, in actual design, each fixed protrusion 14 can also have a groove on its inner side, and each groove can have a ball bearing 80. The drive mechanism 40 is located on the base 10 between any two adjacent fixed protrusions 14. This makes the installation of the movable seat 20 more stable and has better structural stability.

[0097] The preferred embodiments of the present invention have been described in detail above. However, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to the present invention. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A lens aperture adjustment device, characterized in that, The lens aperture adjustment device includes: Base; A movable seat is rotatably mounted on the base about an axis, and the movable seat and the base are provided with lens clearance holes along the axis to cooperate with the lens. A plurality of blades are arranged circumferentially around the lens clearance hole and located above the base and the movable seat. The radially outer sides of the plurality of blades are rotatably connected to the base in a direction parallel to the axis. The plurality of blades are arranged in a ring shape and the radially inner sides form an aperture adjustment hole with an adjustable diameter. When the movable seat rotates around the axis, causing the plurality of blades to rotate, the diameter of the aperture adjustment hole gradually increases or decreases. The drive mechanism, which employs a piezoelectric mechanism, drives the movable seat to rotate around an axis. The bottom end of the movable seat is provided with a mounting hole; The piezoelectric mechanism includes a piezoelectric block, a friction rod, and a movable pin. The piezoelectric block is mounted on the base. The friction rod is fixedly connected to the piezoelectric block and connected to the movable pin. The movable pin extends into the mounting hole. When the piezoelectric block moves, the friction rod moves linearly, driving the movable pin to push the movable seat to rotate within the mounting hole. The linear motion direction of the friction rod is parallel to the tangential direction of the movable seat when it rotates, and the length direction of the mounting hole is consistent with the linear motion direction of the friction rod.

2. The lens aperture adjustment device as described in claim 1, characterized in that, The piezoelectric mechanism further includes a collar, a plug plate, and a movable component. The collar is sleeved on the friction rod and is an open collar. The plug plate is respectively provided at the two open ends of the collar. The plug plate is inserted into the plug hole of the movable component and clamps the friction rod. The movable pin is provided on the movable component. And / or, the piezoelectric mechanism further includes a counterweight, which is fixedly connected to the piezoelectric block and located on the side away from the friction rod. The counterweight is mounted on the base, and the piezoelectric block is mounted on the base via the counterweight. And / or, the axial direction of the movable pin is parallel to the axis; And / or, the base is provided with a mounting groove, and the piezoelectric mechanism is installed in the mounting groove; And / or, the piezoelectric block is powered by an external circuit or by the built-in wiring within the base.

3. The lens aperture adjustment device as described in claim 1, characterized in that, The blade has a fixing hole on its radial outer side, the base has a support protrusion, the movable seat ring is located on the outer side of the support protrusion, and the top of the support protrusion has a fixing pin, which is rotatably connected to the fixing hole. And / or, the blade is provided with a movable hole, and the top of the movable seat is provided with a movable pin. The movable pin is connected to the movable hole on the blade. When the movable seat rotates, the movable pin drives the blade to rotate around a direction parallel to the axis, thereby causing the diameter of the aperture adjustment hole to change.

4. The lens aperture adjustment device as described in claim 3, characterized in that, The movable hole is an arc-shaped hole; And / or, the base, the supporting protrusion, and the movable seat are all annular structures; And / or, an aperture disk is mounted on the fixing pin at the top of the support protrusion, the aperture disk is located between the support protrusion and several blades, and the central hole of the aperture disk is an aperture defining hole.

5. The lens aperture adjustment device as described in claim 4, characterized in that, The radially inner end of the blade is a wedge-shaped portion, and at least one of the two sidewalls of the wedge-shaped portion is an arc-shaped surface and close to the lens clearance hole, so that the blades form a near-circular aperture adjustment hole; the curvature of the arc-shaped hole is consistent with the curvature of the arc-shaped surface; And / or, the movable hole is an arc-shaped hole extending along the involute direction of the lens clearance hole.

6. The lens aperture adjustment device as described in any one of claims 1 to 5, characterized in that, The adjacent blades are staggered and stacked; And / or, the radially inner end of the blade is a wedge-shaped portion, at least one of the two sidewalls of the wedge-shaped portion is an arc-shaped surface and close to the lens clearance hole, causing the plurality of blades to form a near-circular aperture adjustment hole.

7. The lens aperture adjustment device as described in any one of claims 1 to 5, characterized in that, The base edge is provided with a plurality of fixed protrusions along the circumferential direction. The fixed protrusions are located on the outside of the movable seat, and a fixed post is provided at the top of the fixed protrusion. The lens aperture adjustment device also includes a top cover, which is fixedly connected to the fixed post. An movable space is formed between the top cover and the base. The top cover, the movable base, and the base are provided with lens clearance holes that cooperate with the lens along the axis. The movable seat, the plurality of blades, and the drive mechanism are all disposed within the movable space, and the movable seat and the plurality of blades can rotate within the movable space.

8. The lens aperture adjustment device as described in any one of claims 1 to 5, characterized in that, The base edge is provided with a number of fixed protrusions along the circumferential direction. The fixed protrusions are located on the outside of the movable seat. Some or all of the fixed protrusions are provided with grooves on their inner sides. Some or all of the grooves are provided with balls. When the movable seat is installed on the base, one inner wall of the movable seat contacts the balls and rotates under the action of the drive mechanism.

9. The lens aperture adjustment device as described in claim 8, characterized in that, The ball bearing is disposed in the groove on one side of the base, and the drive mechanism is located on the base between two adjacent fixed protrusions having the ball bearing; Alternatively, each of the grooves may contain a ball bearing, and the drive mechanism may be located on the base between any two adjacent fixed protrusions.

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