Lens aperture adjusting device

Abstract

The utility model belongs to the technical field of electronic equipment, and particularly relates to a lens aperture adjusting device, which comprises a base; the movable seat is rotatably arranged on the base around the axis, and the movable seat and the base are provided with lens avoiding holes matched with the lens along the axis; the light absorption piece shields the lens avoiding hole in the base, and the light absorption piece is provided with a center hole; the two shielding blades are arranged above the base and the movable seat in a central symmetry mode, the shielding blades are rotatably connected to the base in the direction parallel to the axis, and when the movable seat rotates around the axis to drive the two shielding blades to rotate, the two shielding blades form an aperture adjusting hole with the variable diameter above the light absorption piece. According to the utility model, through the combined design of the light absorption sheet and the two shielding blades, when the movable seat rotates, the size of the lens aperture can be well adjusted, and the purpose of variable aperture is realized.

Description

Technical Field

[0001] This utility model 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. Utility Model Content

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

[0005] A lens aperture adjustment device, the 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 light-absorbing sheet that blocks the lens clearance hole on the base, the light-absorbing sheet having a central hole;

[0009] Two shielding blades are symmetrically arranged above the base and the movable seat. The shielding blades are rotatably connected to the base in a direction parallel to the axis. When the movable seat rotates around the axis, causing the two shielding blades to rotate, the two shielding blades form an aperture adjustment hole with a variable diameter above the light-absorbing sheet.

[0010] Optionally, the two shielding blades are arranged in an alternating overlapping configuration.

[0011] Optionally, the shielding blade is provided with a first blade hole and a second blade hole that are interconnected, wherein the diameter of the first blade hole is not greater than the diameter of the central hole of the light-absorbing sheet, and the diameter of the second blade hole is greater than the diameter of the central hole of the light-absorbing sheet;

[0012] When the first blade holes on the two blocking blades are combined to form the aperture adjustment hole, the aperture adjustment hole is not larger than the center hole of the light-absorbing plate, and the aperture adjustment hole serves as the lens aperture hole;

[0013] When the second blade holes on the two blocking blades are combined to form the aperture adjustment hole, the aperture adjustment hole is larger than the center hole of the light-absorbing sheet, and the center hole of the light-absorbing sheet serves as the lens aperture hole.

[0014] Optionally, the base is provided with a support protrusion, the movable seat ring is provided on the outside of the support protrusion, the support protrusion has the lens avoidance hole, the top of the support protrusion is provided with a light-absorbing sheet mounting groove, the light-absorbing sheet mounting groove is arranged around and communicates with the lens avoidance hole, and the light-absorbing sheet is installed in the light-absorbing sheet mounting groove.

[0015] Optionally, the shielding blade is provided with a fixing pin hole, the base is provided with a support protrusion, the movable seat ring is provided on the outside of the support protrusion, the top of the support protrusion is provided with a fixing pin, and the fixing pin is rotatably connected to the fixing pin hole.

[0016] The shielding blade is provided with a movable pin hole, and the top of the movable seat is provided with a movable pin shaft. The movable pin shaft is connected to the movable pin hole on the shielding blade. When the movable seat rotates, the movable pin shaft drives the shielding blade to rotate around the axis of the fixed pin shaft, thereby causing the diameter of the aperture adjustment hole to change.

[0017] Optionally, the top of the movable seat is provided with a raising platform, and one of the movable pins is disposed on the raising platform. The movable pin on the raising platform is connected to the movable pin hole of the shielding blade located above.

[0018] Optionally, the movable pin hole is located at the first end of the blocking blade, the first blade hole and the second blade hole are located at the second end of the blocking blade away from the first end, and the fixed pin hole is located between the first end and the second end.

[0019] Optionally, the movable pin hole is an oblong hole.

[0020] Optionally, the movable pin hole is an oblong hole extending along or parallel to the tangential direction of the central hole of the light-absorbing sheet.

[0021] Optionally, the fixing pin hole is a circular hole.

[0022] Optionally, the base edge is provided with a plurality of fixed protrusions along the circumferential direction, and the movable seat edge is provided with a limiting groove for avoiding the fixed protrusions, wherein the circumferential length of the limiting groove is greater than the circumferential length of the fixed protrusions.

[0023] 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 an installation shaft;

[0024] The lens aperture adjustment device also includes a top cover, which is fixedly connected to the mounting shaft. 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.

[0025] The movable seat and the two shielding blades are both disposed within the movable space and can rotate within the movable space.

[0026] Optionally, the base edge is provided with a plurality of fixed protrusions along the circumferential direction, and a support platform is provided on the inner wall of the fixed protrusions, and the movable seat is placed on the support platform.

[0027] Optionally, the support platform is provided with a ball bearing placement groove, in which a ball bearing is placed, and the bottom end of the movable seat abuts against the ball bearing.

[0028] Optionally, the lens aperture adjustment device further includes a circuit board, which is disposed at the top of the base and below the movable seat. A drive coil is disposed inside the circuit board, and a magnet is disposed at the bottom of the movable seat opposite to the drive coil. The movable seat is rotated around the axis by the cooperation of the magnet and the drive coil.

[0029] Optionally, the circuit board is an FPC board.

[0030] Optionally, the circuit board is powered by pins mounted on the base, and the pins are connected to an external circuit.

[0031] Optionally, the base, the support protrusion, the movable seat, the light-absorbing sheet, and the circuit board are all annular structures.

[0032] Optionally, when the base is provided with a fixing protrusion, the edge of the circuit board is provided with a relief groove for avoiding the fixing protrusion.

[0033] Optionally, at least one of the clearance grooves is provided with a positioning groove, and the upper end of the base is provided with a positioning protrusion that cooperates with the positioning groove. The positioning protrusion is inserted into or snapped into the positioning groove to achieve the positioning of the circuit board on the base.

[0034] Optionally, a magnetic element is provided at the bottom of the base, and the magnetic element and the magnet at the bottom of the movable seat generate an attractive force, so that the movable seat is tightly abutted against the base.

[0035] Optionally, the magnetic component is a bottom iron ring, and the bottom end of the base is provided with a ring-shaped iron ring mounting groove, in which the bottom iron ring is installed.

[0036] Beneficial effects: This utility model, through the combined design of a light-absorbing plate and two blocking blades, can better adjust the size of the lens aperture when the movable base rotates, thus achieving the purpose of variable aperture. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of this utility model;

[0038] Figure 2 for Figure 1 Top view;

[0039] Figure 3 for Figure 2 AA section view;

[0040] Figure 4 for Figure 1 Exploded view;

[0041] Figure 5 for Figure 4 Further exploded view;

[0042] Figure 6 This is a schematic diagram of one structure of the two shielding blades of this utility model;

[0043] Figure 7 This is a diagram showing the positional relationship between the base, movable seat, light-absorbing sheet, and circuit board of this utility model;

[0044] Figure 8 for Figure 7 Another angle of the exploded view;

[0045] Figure 9 for Figure 8 Further exploded view;

[0046] Figure 10 This is a diagram showing the positional relationship between the base, light-absorbing sheet, and circuit board of this utility model;

[0047] Figure 11 for Figure 10 Exploded view;

[0048] Figure 12 for Figure 10 Partial exploded view;

[0049] Figure 13 This is an exploded view showing the positional relationship between the base and the bottom iron ring of this utility model. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] In the following description, in order to clearly demonstrate the structure and working method of this utility model, 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.

[0054] Reference Figures 1 to 13 This utility model provides a lens aperture adjustment device, which is used to adjust the aperture size by being fitted onto a lens. The lens aperture adjustment device includes a base 10, a movable seat 20, two blocking blades 30, and a light-absorbing plate 40.

[0055] The base 10 is used to fix it to the housing of the lens motor.

[0056] The movable base 20 is rotatably mounted on the base 10 around an axis. Both the movable base 20 and the base 10 have lens clearance holes along their axes to allow light to enter the lens. These lens clearance holes are typically circular. The diameters of the lens clearance holes on the movable base 20 and the base 10 may be the same or different, but each lens clearance hole is larger than the center hole of the light-absorbing plate. The lens clearance hole 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.

[0057] A light-absorbing plate 40 blocks the lens clearance hole on the base 10. The light-absorbing plate 40 has a central hole 40a, which is a through hole that communicates along the axial direction. The light-absorbing plate 40 can be disposed inside or outside the lens clearance hole on the base 10. The central hole 40a of the light-absorbing plate 40 can limit the maximum aperture range and prevent excess light from entering the lens, thereby improving the aperture adjustment effect.

[0058] Two blocking blades 30 are symmetrically arranged above the base 10 and the movable seat 20. The blocking blades 30 are rotatably connected to the base 10 in a direction parallel to the axis. When the movable seat 20 rotates around its axis, causing the two blocking blades 30 to rotate, they form a variable aperture adjustment hole 30a above the light-absorbing plate 40. Specifically, the movable seat 20 is connected to each blocking blade 30. When the movable seat 20 rotates around its axis, causing the two blocking blades 30 to rotate relative to each other, the aperture adjustment hole 30a formed by them changes. Because the opening size of the aperture adjustment hole 30a changes, the light entering the lens changes accordingly, thereby achieving lens blocking and aperture adjustment.

[0059] In one embodiment, the two blocking blades 30 are arranged in an alternating overlapping manner. That is, the two blocking blades 30 partially overlap each other during rotation.

[0060] Reference Figure 4 When the movable seat 20 drives the two blocking blades 30 to rotate clockwise, the overlapping portion of the two blocking blades 30 gradually decreases, and the aperture adjustment hole 30a gradually becomes smaller; when the movable seat 20 drives the two blocking blades 30 to rotate counterclockwise, the overlapping portion of the two blocking blades 30 gradually increases, and the aperture adjustment hole 30a gradually becomes larger.

[0061] In one embodiment, reference is made to Figure 6The shielding blade 30 is provided with a first blade hole 31 and a second blade hole 32 that are interconnected. Both the first blade hole 31 and the second blade hole 32 are through holes that are interconnected along the axial direction. The first blade hole 31 and the second blade hole 32 are both closed through holes on the shielding blade 30, and when they are interconnected, they form a closed irregular-shaped hole. The diameter of the first blade hole 31 is not greater than the diameter of the central hole 40a of the light-absorbing sheet 40, and the diameter of the second blade hole 32 is greater than the diameter of the central hole 40a of the light-absorbing sheet 40.

[0062] When the two blocking blades 30 are staggered and stacked, the adjustment areas of the two blocking blades 30 with the first blade hole 31 and the second blade hole 32 can achieve spatial overlap during rotation. When the two blocking blades 30 rotate, there is a spatial overlap of the two first blade holes 31 and the two second blade holes 32. Therefore, the area of ​​the hole formed by the combination of the first blade hole 31 and the second blade hole 32 also changes accordingly.

[0063] When the first blade holes 31 on the two blocking blades 30 are combined, the two first blade holes 31 form a small circular aperture as the aperture adjustment aperture 30a. Since the diameter of the first blade hole 31 is not greater than the diameter of the central aperture 40a of the light-absorbing plate 40, this small circular aperture is smaller than or equal to the central aperture 40a of the light-absorbing plate 40. In this case, the lens aperture is this small circular aperture. When the second blade holes 32 on the two blocking blades 30 are combined, the two second blade holes 32 form a large circular aperture as the aperture adjustment aperture 30a. Since the diameter of the second blade hole 32 is greater than the diameter of the central aperture 40a of the light-absorbing plate 40, this large circular aperture is larger than the central aperture 40a of the light-absorbing plate 40. In this case, the lens aperture is the central aperture 40a of the light-absorbing plate 40.

[0064] In one embodiment, reference is made to Figure 3 , Figure 7 , Figures 10 to 12 The base 10 has a support protrusion 11, and a movable seat 20 is arranged around the outside of the support protrusion 11. The support protrusion 11 has a lens clearance hole 10a for the base 10. A light-absorbing sheet 40 with a light-absorbing effect is arranged between the top of the support protrusion 11 and the blocking blade 30. The top of the support protrusion 11 has a light-absorbing sheet mounting groove 12, which is arranged around and connected to the lens clearance hole 10a. The light-absorbing sheet 40 is installed in the light-absorbing sheet mounting groove 12.

[0065] In one embodiment, reference is made to Figure 6 The shielding blade 30 is provided with a fixing pin hole 33.

[0066] Reference Figure 4 , Figure 7 , Figures 10 to 12The base 10 has a support protrusion 11, and the movable seat 20 is arranged around the outside of the support protrusion 11. A fixing pin 13 is provided at the top of the support protrusion 11, and the fixing pin 13 is rotatably connected to the fixing pin hole 33. This causes the blocking blade 30 to rotate around the axial direction of the fixing pin 13 (i.e.,...). Figure 4 It is rotatably connected to the support protrusion 12 of the base 10 in the up-down direction.

[0067] The number of fixing pins 13 is not less than the number of blocking blades 30, so that one blocking blade 30 can be rotatably connected to a corresponding fixing pin 13. For example, there are two blocking blades 30, and the number of fixing pins 13 is also two, with the two fixing pins 13 symmetrically arranged circumferentially at the top of the support protrusion 12.

[0068] The fixing pin hole 33 is preferably a circular hole that is rotatably connected to the fixing pin shaft 13.

[0069] Reference Figure 6 The shielding blade 30 is provided with a movable pin hole 34, and the top of the movable seat 20 is provided with a movable pin shaft 21. The movable pin shaft 21 is connected to the movable pin hole 34 on the shielding blade 30. When the movable seat 20 rotates, the movable pin shaft 21 drives the shielding blade 30 to rotate around the axis of the fixed pin shaft 13, thereby causing the diameter of the aperture adjustment hole 30a to change.

[0070] The number of movable pins 21 is not less than the number of blocking blades 30, so that one blocking blade 30 can be connected to a corresponding movable pin 21. For example, if there are two blocking blades 30, the number of movable pins 21 is also two. The two movable pins 21 are symmetrically arranged circumferentially at the top of the movable seat 20.

[0071] The movable pin hole 34 is preferably an oblong hole. More preferably, the movable pin hole 34 is an oblong hole that extends along or is parallel to the tangential direction of the central hole 40a of the light-absorbing sheet 40.

[0072] In one embodiment, reference is made to Figure 4 , Figure 5 and Figure 7 The top of the movable seat 20 is provided with a raising platform 22, and a movable pin 21 is provided on the raising platform 22. The movable pin 21 on the raising platform 22 is connected to the movable pin hole 34 of the shielding blade 30 located above.

[0073] In this embodiment, by setting a height-enhancing platform 22 at the top of the movable seat 20, the two shielding blades 30 can be arranged to overlap in height.

[0074] In one embodiment, reference is made to Figure 6The movable pin hole 34 is located at the first end of the blocking blade 30, the first blade hole 31 and the second blade hole 32 are located at the second end of the blocking blade 30 away from the first end, and the fixed pin hole 33 is located between the first end and the second end.

[0075] In one embodiment, reference is made to Figure 4 , Figure 5 and Figure 7 The base 10 has several fixed protrusions 14 arranged circumferentially along its edge, and the movable seat 20 has a limiting groove 23 arranged on its edge to avoid the fixed protrusions 14. The circumferential length of the limiting groove 23 is greater than the circumferential length of the fixed protrusions 14.

[0076] like Figure 7 As shown, when the movable seat 20 is placed on the base 10, the fixed protrusion 14 passes through and extends out of the limiting groove 23. At this time, there is a preset distance between the side wall of the fixed protrusion 14 and the inner side wall of the limiting groove 23. This preset distance is the maximum rotation amplitude of the movable seat 20. In other words, the limiting groove 23 limits the maximum rotation angle of the movable seat 20.

[0077] In one embodiment, reference is made to Figures 3 to 5 , Figures 7 to 11 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 the top of the fixed protrusions 14 is provided with an installation shaft 15.

[0078] Reference Figures 3 to 5 , Figure 11 The lens aperture adjustment device also includes a top cover 50, which is fixedly connected to the mounting shaft 15. A movable space is formed between the top cover 50 and the base 10. The top cover 50, the movable seat 20, and the base 10 are provided with lens clearance holes along their axes to mate with the lens. The lens clearance holes on the top cover 50 may be the same size or different from the lens clearance holes on the movable seat 20 and the base 10, but each lens clearance hole is larger than the center hole 40a of the light-absorbing plate 40. The movable seat 20 and the two blocking blades 30 are both located within the movable space and can rotate within it.

[0079] In practice, each lens clearance hole is located at the center of each component, and the center of the base 10, movable seat 20, light-absorbing plate 40 and top cover 50 are all aligned with the lens on the lens motor.

[0080] When the top cover 50 is fixedly connected to the mounting shaft 15, a connection hole can be drilled in the top cover 50, and the top cover 50 and the mounting shaft 15 can be fixedly connected through the connection hole.

[0081] The number of mounting shafts 15 provided at the top of the fixed protrusion 14 can be determined according to actual needs, such as one, two, or several. The top cover 50 is provided with the same number of connecting holes as the mounting shafts 15 to achieve a fixed connection between the two.

[0082] In one embodiment, reference is made to Figures 3 to 5 , Figures 7 to 11 The base 10 has several fixed protrusions 14 arranged circumferentially along its edge. A support platform 16 is provided on the inner wall of the fixed protrusions 14, and the movable seat 20 is placed on the support platform 16.

[0083] In this embodiment, the base 10 supports the movable seat 20 through the support platform 16.

[0084] In one embodiment, reference is made to Figures 10 to 12 The support platform 16 is provided with a ball placement groove 161, in which a ball is placed, and the bottom end of the movable seat 20 abuts against the ball.

[0085] In this embodiment, the movable seat 20 is supported by the ball bearing placement groove 161 provided on the support platform 16 to reduce the frictional resistance of the movable seat 20. Alternatively, the movable seat 20 can be placed directly on the support platform 16, and it can rotate by overcoming the friction between the two when it moves.

[0086] In one embodiment, reference is made to Figures 3 to 5 , Figures 7 to 11 The lens aperture adjustment device also includes a circuit board 60, which is located at the top of the base 10 and below the movable seat 20. A drive coil is provided inside the circuit board 60, and a magnet 70 is provided at the bottom of the movable seat 20 opposite to the drive coil. The movable seat 20 is rotated around the axis by the cooperation of the magnet 70 and the drive coil.

[0087] In this embodiment, the magnet 70 and the drive coil constitute a drive mechanism for driving the movable seat 20 to rotate around the axis.

[0088] In one embodiment, the circuit board 60 is an FPC board.

[0089] In one embodiment, the circuit board 60 is powered by a pin 61 disposed on the base 10, and the pin 61 is connected to an external circuit.

[0090] In one embodiment, the base 10, the support protrusion 11, the movable seat 20, the light-absorbing sheet 40, and the circuit board 60 are all annular structures.

[0091] Therefore, the movable seat 20 is fitted around the outside of the support protrusion 11 and located on the base 10, and the movable seat 20 can rotate on the base 10 around the outside of the support protrusion 11.

[0092] Of course, the base 10, support protrusion 11, movable seat 20, light-absorbing sheet 40 and circuit board 60 can also be other structures, such as a polygonal outer contour. However, the base 10, support protrusion 11, movable seat 20, light-absorbing sheet 40 and circuit board 60 are all provided with corresponding holes in the middle to form lens avoidance holes.

[0093] In one embodiment, the base 10 and the support protrusion 11 are integrally formed.

[0094] In one embodiment, reference is made to Figure 11 When the base 10 is provided with a fixed protrusion 14, the edge of the circuit board 60 is provided with a relief groove 62 for avoiding the fixed protrusion 14.

[0095] In one embodiment, reference is made to Figure 11 At least one clearance groove 62 is provided with a positioning groove 63, and the upper end of the base 10 is provided with a positioning protrusion 17 that cooperates with the positioning groove 63. The positioning protrusion 17 and the positioning groove 63 are inserted or snapped together to realize the positioning of the circuit board 60 on the base 10, so as to ensure the connection stability between the circuit board 60 and the base 10.

[0096] In one embodiment, a magnetic element is provided at the bottom of the base 10. The magnetic element and the magnet 70 at the bottom of the movable seat 20 generate an attractive force, causing the movable seat 20 to abut tightly against the base 10, thereby improving the stability of the connection structure between the base 10 and the movable seat 20. At the same time, when ball bearings are provided between the support platform 16 and the movable seat 20, this design structure can prevent the ball bearings from dislodging.

[0097] In one embodiment, reference is made to Figure 13 The magnetic component is a bottom iron ring 18. The bottom end of the base 10 is provided with a ring-shaped iron ring mounting groove 19, and the bottom iron ring 18 is installed in the iron ring mounting groove 19. The bottom iron ring 18 and the magnet 70 fixedly installed at the bottom end of the movable seat 20 generate an attractive force, so that the movable seat 20 can be tightly abutted against the base 10.

[0098] The preferred embodiments of this utility model 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 this utility model. These equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A lens aperture adjusting device, characterized by, The lens aperture adjusting device comprises: a base; a movable seat rotatably arranged on the base along an axis, the movable seat and the base being provided with a lens avoiding hole matched with a lens along the axis; a light absorbing sheet arranged above the lens avoiding hole on the base, the light absorbing sheet having a central hole; two shielding blades arranged above the base and the movable seat in a central symmetry, the shielding blades being rotatably connected to the base along a direction parallel to the axis, the two shielding blades being rotated by the rotation of the movable seat along the axis, and forming an aperture adjusting hole with a variable diameter above the light absorbing sheet.

2. The lens aperture adjusting apparatus according to claim 1, wherein The two shielding blades are arranged in an interlaced and superposed manner. The shielding blades are provided with a first blade hole and a second blade hole in communication with each other, the diameter of the first blade hole is not greater than the diameter of the central hole of the light absorbing sheet, and the diameter of the second blade hole is greater than the diameter of the central hole of the light absorbing sheet. When the first blade holes on the two shielding blades enclose the aperture adjusting hole, the aperture adjusting hole is not greater than the central hole of the light absorbing sheet, and the aperture adjusting hole serves as a lens aperture hole. When the second blade holes on the two shielding blades enclose the aperture adjusting hole, the aperture adjusting hole is greater than the central hole of the light absorbing sheet, and the central hole of the light absorbing sheet serves as a lens aperture hole.

3. The lens aperture adjusting apparatus according to claim 1, wherein The base is provided with a supporting protrusion, the movable seat is arranged outside the supporting protrusion, the supporting protrusion has the lens avoiding hole, the supporting protrusion is provided with a light absorbing sheet mounting groove at the top end, the light absorbing sheet mounting groove is arranged outside and in communication with the lens avoiding hole, and the light absorbing sheet is mounted in the light absorbing sheet mounting groove.

4. The lens aperture adjusting apparatus according to claim 1, wherein The shielding blades are provided with a fixing pin hole, the base is provided with a supporting protrusion, the movable seat is arranged outside the supporting protrusion, the supporting protrusion is provided with a fixing pin shaft at the top end, and the fixing pin shaft is rotatably connected with the fixing pin hole. The shielding blades are provided with a movable pin hole, the top end of the movable seat is provided with a movable pin shaft, the movable pin shaft is connected with the movable pin hole on the shielding blade, and when the movable seat rotates, the movable pin shaft drives the shielding blade to rotate around the axis of the fixing pin shaft, so that the diameter of the aperture adjusting hole changes.

5. The lens aperture adjusting apparatus according to claim 4, wherein The two shielding blades are arranged in an interlaced and superposed manner, the top end of the movable seat is provided with a raised platform, one of the movable pin shafts is arranged on the raised platform, and the movable pin shaft on the raised platform is connected with the movable pin hole of the shielding blade above; And / or, the shielding blades are provided with a first blade hole and a second blade hole in communication with each other, the diameter of the first blade hole is not greater than the diameter of the central hole of the light absorbing sheet, and the diameter of the second blade hole is greater than the diameter of the central hole of the light absorbing sheet; the movable pin hole is located at the first end of the shielding blade, the first blade hole and the second blade hole are located at the second end of the shielding blade away from the first end, and the fixing pin hole is located between the first end and the second end. And / or, the movable pin hole is a waist-shaped hole; And / or, the movable pin hole is a waist-shaped hole extending along the tangent direction of the center hole of the light-absorbing sheet or parallel to the tangent direction; And / or, the fixed pin hole is a circular hole.

6. The lens aperture adjusting apparatus according to claim 1, wherein The base edge is provided with a plurality of fixed protrusions in the circumferential direction, and the movable seat edge is provided with a limiting groove for avoiding the fixed protrusions, and the circumferential length of the limiting groove is greater than the circumferential length of the fixed protrusions; And / or, the base edge is provided with a plurality of fixed protrusions in the circumferential direction, and the fixed protrusions are located outside the movable seat, and the top end of the fixed protrusion is provided with a mounting shaft; the lens aperture adjusting device further comprises a top cover, the top cover is fixedly connected with the mounting shaft, and the top cover and the base form a movable space; the top cover, the movable seat and the base are provided with the lens avoiding hole matched with the lens along the axis; the movable seat and the two shielding blades are arranged in the movable space and can rotate in the movable space; And / or, the base edge is provided with a plurality of fixed protrusions in the circumferential direction, and the inner wall of the fixed protrusion is provided with a support platform, and the movable seat is placed on the support platform; And / or, the base edge is provided with a plurality of fixed protrusions in the circumferential direction, and the inner wall of the fixed protrusion is provided with a support platform, and the support platform is provided with a ball placing groove, and the ball is placed in the ball placing groove.

7. The lens aperture adjusting apparatus according to any one of claims 1 to 6, wherein The lens aperture adjusting device further comprises a circuit board, the circuit board is arranged at the top end of the base and below the movable seat, the circuit board is provided with a drive coil, and the bottom end of the movable seat is provided with a magnet opposite to the drive coil, so that the movable seat rotates around the axis by cooperation of the magnet and the drive coil.

8. The lens aperture adjusting apparatus according to claim 7, wherein The circuit board is an FPC board; And / or, the circuit board is powered by a pin element arranged on the base, and the pin element is connected with external circuit; And / or, when the base is provided with a fixed protrusion, the edge of the circuit board is provided with an avoiding groove for avoiding the fixed protrusion; And / or, when the base is provided with a fixed protrusion, the edge of the circuit board is provided with an avoiding groove for avoiding the fixed protrusion, at least one of the avoiding grooves is provided with a positioning groove, and the upper end of the base is provided with a positioning protrusion matched with the positioning groove, so that the positioning protrusion and the positioning groove are inserted or clamped to realize positioning of the circuit board on the base.

9. The lens aperture adjusting apparatus according to claim 7, wherein The bottom end of the base is provided with a magnetic attraction element, and the magnetic attraction element generates an attractive force with the magnet at the bottom end of the movable seat, so that the movable seat is tightly abutted on the base.

10. The lens aperture adjusting apparatus according to claim 9, wherein The magnetic attraction element is a bottom iron ring, and the bottom end of the base is provided with an annular iron ring mounting groove, and the bottom iron ring is mounted in the iron ring mounting groove.

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