Lens aperture adjusting device

Abstract

The invention 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 multiple blades are annularly arranged in the circumferential direction of the lens avoiding hole and located above the base and the movable seat, the radial outer sides of the multiple blades are rotatably connected to the base in the direction parallel to the axis, the multiple blades are annularly arranged, and the radial inner sides of the multiple blades define an aperture adjusting hole with the adjustable diameter; when the movable seat rotates around the axis to drive the plurality of blades to rotate, the diameter of the aperture adjusting hole is gradually increased or decreased; and the driving mechanism adopts a piezoelectric mechanism, and the driving mechanism drives the movable seat to rotate around the axis. The aperture adjusting hole with the adjustable diameter is defined by the multiple blades, when the driving mechanism drives the movable base to rotate, the blades rotate along with the movable base, the size of an aperture can be well adjusted, and the purpose of variable aperture is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic equipment, and in particular relates to a lens aperture adjustment device. Background Art

[0002] As for the camera aperture, in places with strong light, the camera can obtain a deeper depth of field and a sharper picture by reducing the aperture, and in places with insufficient light, the amount of light entering can be increased by increasing the aperture, so that a pure picture with higher exposure and lower noise can be obtained. In the field of electronic equipment, the camera of general electronic equipment cannot change the aperture size, so it is impossible to adapt to various shooting environments by changing the aperture. This has caused many electronic devices to be overexposed outdoors in strong sunlight, and underexposed at night, resulting in dark pictures with high noise and loss of details. In order to meet the user's photography needs, a physical variable aperture is very important for shooting.

[0003] In view of this, people skilled in the art need to develop a new type of variable aperture to overcome the above technical problems. Summary of the invention

[0004] The present invention aims to solve the above technical problems and provides a lens aperture adjustment device.

[0005] A lens aperture adjustment device, comprising:

[0006] Base;

[0007] A movable seat, the movable seat is rotatably arranged on the base around an axis, the movable seat and the base are provided with a lens avoidance hole matched with the lens along the axis, and a mounting hole is provided at the bottom end of the movable seat;

[0008] A plurality of blades, wherein the plurality of blades are arranged around the circumference of the lens avoidance hole and are located above the base and the movable seat, wherein the radial outer sides of the plurality of blades are rotatably connected to the base around a direction parallel to the axis, and the plurality of blades are arranged in a ring shape and the radial inner sides thereof form an aperture adjustment hole with an adjustable diameter, and when the movable seat rotates around the axis to drive the plurality of blades to rotate, the diameter of the aperture adjustment hole gradually increases or decreases;

[0009] The driving mechanism adopts a piezoelectric mechanism, and the piezoelectric mechanism includes a piezoelectric block, a driving member, a moving member, an elastic member and a moving pin shaft. The driving member is fixed on the top of the piezoelectric block, and the moving member is located above the driving member. The elastic member gives the moving member a downward tendency so that the bottom end of the moving member abuts against the top end of the driving member. The moving member is connected to the moving pin shaft, and the moving pin shaft extends into the mounting hole. When the piezoelectric block moves, the driving member drives the moving member to move linearly, thereby driving the moving pin shaft to push the movable seat to rotate in the mounting hole.

[0010] Optionally, the elastic member adopts an inverted U-shaped structure, the piezoelectric block, the driving member and the moving member are all arranged in the elastic member, the bottom end of the piezoelectric block is fixed to the inner side of the bottom cross section of the elastic member, the inner side of the top cross section of the elastic member abuts against the moving member, and the moving pin extends out of the elastic member.

[0011] Optionally, an elastic member avoidance hole communicating inside and outside is provided on the top transverse section of the elastic member, the bottom end of the movable pin is connected to the movable member, and the top end of the movable pin extends out of the elastic member avoidance hole and extends into the mounting hole.

[0012] Optionally, a contact protrusion is provided on the inner side surface of the top transverse section of the elastic member, the length direction of the contact protrusion is consistent with the moving direction of the moving member, and the contact protrusion abuts against the top surface of the moving member.

[0013] Optionally, the driving member adopts a U-shaped structure, the horizontal section of the driving member is fixed to the top of the piezoelectric block, and the tops of two vertical sections of the driving member are in contact with the bottom of the moving member.

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

[0015] Optionally, a mounting groove is provided on the base, 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 in the base.

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

[0018] Optionally, a movable hole is provided on the blade, and a movable pin is provided on the top of the movable seat. 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 in a direction parallel to the axis, thereby changing the diameter of the aperture adjustment hole.

[0019] Optionally, two adjacent blades are arranged in a staggered and overlapping manner.

[0020] Optionally, the radial inner end of the blade is a wedge-shaped portion, and at least one of the two side walls of the wedge-shaped portion is an arc-shaped surface and is close to the lens avoidance hole, so that a plurality of the blades form a quasi-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 avoidance 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 fixed pin at the top of the supporting protrusion, the aperture disk is located between the supporting protrusion and a plurality of blades, and the center hole of the aperture disk is an aperture limiting hole.

[0026] Optionally, a plurality of fixing protrusions are arranged on the edge of the base along the circumferential direction, the fixing protrusions are located outside the movable seat, and a fixing column is arranged on the top of the fixing protrusion;

[0027] The lens aperture adjustment device further comprises a top cover, the top cover is fixedly connected to the fixing column, a movable space is formed between the top cover and the base, and the top cover, the movable seat and the base are provided with the lens avoidance hole matched with the lens along the axis;

[0028] The movable seat, the plurality of blades and the driving mechanism are all arranged in the movable space, and the movable seat and the plurality of blades can rotate in the movable space.

[0029] Optionally, grooves are provided on the inner sides of part or all of the fixed protrusions, and balls are provided in part or all of the grooves. When the movable seat is installed on the base, an inner wall of one side of the movable seat contacts the balls and rotates under the action of the driving mechanism.

[0030] Optionally, the ball bearing is arranged in the groove on one side of the base, and the driving mechanism is located on the base between two adjacent fixing protrusions having the ball bearing.

[0031] Optionally, the ball bearing is disposed in each of the grooves, and the driving mechanism is located on the base between any two adjacent fixing protrusions.

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

[0033] 1. The present invention forms an aperture adjustment hole with adjustable diameter through a plurality of blades. When the driving mechanism drives the movable seat to rotate, the blades rotate along with it, and the aperture size can be adjusted well, thereby achieving the purpose of variable aperture.

[0034] 2. The driving mechanism of the present invention adopts a piezoelectric mechanism. After the piezoelectric block is energized, it will stretch. The driving part moves along with the top end surface of the piezoelectric block and drives the moving part to move linearly under the action of friction, thereby making the moving pin connected to the moving part move linearly. The moving pin pushes the movable seat to rotate in the mounting hole at the bottom of the movable seat, thereby realizing the rotation of the movable seat. The present invention adopts a piezoelectric mechanism. Compared with the traditional driving device with a magnet and a coil matching structure, the magnet and the coil will produce a magnetic field. The magnetic field may interfere with other electronic components such as the inside of the mobile phone, while the piezoelectric mechanism will not interfere with other components such as the lens motor, and the overall structure of the piezoelectric mechanism is simple and compact, which compresses the overall volume of the lens aperture adjustment device.

[0035] 3. The central hole of the aperture disk of the present invention is the aperture hole with the largest range, and the maximum range of the aperture hole is limited by the aperture disk; at the same time, the aperture disk has a certain wear-resistant effect to prevent the movement of the blades from rubbing against the base.

[0036] 4. The present invention installs a ball bearing inside the fixed protrusion, which can reduce the friction force when the movable seat rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A structural schematic diagram of the present invention;

[0038] Figure 2 for Figure 1 Exploded diagram of

[0039] Figure 3 A diagram showing the positional relationship between the base and the movable seat of the present invention;

[0040] Figure 4 for Figure 3 Exploded diagram of

[0041] Figure 5A schematic diagram of the structure of the movable seat of the present invention;

[0042] Figure 6 An exploded diagram of the positional relationship between the base and the driving mechanism of the present invention;

[0043] Figure 7 A schematic diagram of the structure of the driving mechanism of the present invention;

[0044] Figure 8 for Figure 7 Exploded diagram of

[0045] Fig. 9 for Figure 8 Schematic diagram from another angle;

[0046] Fig.10 An exploded view of the positional relationship of a plurality of blades arranged in a ring shape according to the present invention. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate 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 the various disclosed embodiments to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of these specific details. In other cases, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0049] References throughout the specification to "one 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. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0050] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0051] Reference Figures 1 to 10The embodiment of the present invention provides a lens aperture adjustment device, which is used to be mounted on a lens to adjust the aperture size. The lens aperture adjustment device includes a base 10, a movable seat 20, a plurality of blades 30 and a driving mechanism 40.

[0052] The base 10 is used to be fixed on the housing of the lens motor.

[0053] The movable seat 20 is rotatably arranged on the base 10 around an axis, and a mounting hole 21 is arranged at the bottom of the movable seat 20. The movable seat 20 and the base 10 are provided with a lens avoidance hole 50 along the axis to match the lens on the lens motor so that light can enter the lens. The lens avoidance hole 50 is usually circular. The lens avoidance hole 50 is located at the center of the movable seat 20 and the base 10. The axis is the center line of the base 10 and the movable seat 20 after they are combined, that is, the axis of the lens avoidance hole 50. For example, Figure 5 The center line A in the up-down direction.

[0054] A plurality of blades 30 are arranged around the circumference of the lens avoidance hole 50 and are located above the base 10 and the movable seat 20. The radial outer sides of the plurality of blades 30 are rotatably connected to the base 10 in a direction parallel to the axis. The plurality of blades 30 are arranged in a ring shape and the radial inner sides form an aperture adjustment hole 30a with adjustable diameter. The movable seat 20 is connected to each blade 30 respectively. When the driving mechanism 40 drives the movable seat 20 to rotate around the axis, and then drives the plurality of blades 30 to rotate, the radial inner sides of the blades 30 move away from or close to the axis, so that the diameter of the aperture adjustment hole 30a gradually increases or decreases. As the opening size of the aperture adjustment hole 30a changes, the light incident on the lens changes accordingly, thereby achieving the operation of blocking the lens and adjusting the lens aperture.

[0055] Reference Figures 7 to 9 The driving mechanism 40 adopts a piezoelectric mechanism, which includes a piezoelectric block 41, a driving member 42, a moving member 43, an elastic member 44 and a moving pin 45.

[0056] The driving member 42 is fixed on the top of the piezoelectric block 41, and the moving member 43 is located above the driving member 42. The elastic member 44 gives the moving member 43 a downward tendency so that the bottom end of the moving member 43 abuts against the top of the driving member 42. The moving member 43 is connected to the moving pin 45, and the moving pin 45 extends into the mounting hole 21. When the driving member 42 moves with the piezoelectric block 41, it drives the moving member 43 to move in a straight line, thereby driving the moving pin 45 to push the movable seat to rotate in the mounting hole 21.

[0057] The driving mechanism of the present invention adopts a piezoelectric mechanism, and the piezoelectric block 41 will stretch after being energized, and the driving member 42 moves along with the top end surface of the piezoelectric block 41 and drives the moving member 43 to move linearly under the action of friction, thereby making the moving pin 45 connected to the moving member 43 move linearly, and the moving pin 45 pushes the movable seat to rotate in the mounting hole 21 at the bottom of the movable seat, thereby realizing the rotation of the movable seat. The present invention adopts a piezoelectric mechanism, and compared with the traditional driving device with a magnet and a coil matching structure, the magnet and the coil match to generate a magnetic field, and the magnetic field may interfere with other electronic components such as problems inside the mobile phone, while the piezoelectric mechanism will not interfere with other components such as the lens motor, and the overall structure of the piezoelectric mechanism is simple and compact, which compresses the overall volume of the lens aperture adjustment device.

[0058] In one embodiment, referring to Figures 7 to 9 The elastic member 44 adopts an inverted U-shaped structure. The piezoelectric block 41, the driving member 42 and the moving member 43 are all arranged in the elastic member 44. The bottom end of the piezoelectric block 41 is fixed to the inner side of the bottom cross section of the elastic member 44, the inner side of the top cross section of the elastic member 44 abuts against the moving member 43, and the moving pin shaft 45 extends out of the elastic member 44.

[0059] The elastic member 44 of this embodiment is arranged in a horizontal U-shape, and its top cross section imparts a downward tendency to the moving member 43 therein.

[0060] Of course, the elastic member 44 may also adopt other existing structures as long as it can give the moving member 43 a downward tendency.

[0061] In one embodiment, referring to Figures 7 to 9 The top transverse section of the elastic member 44 is provided with an elastic member avoidance hole 441 communicating with the inside and outside. The bottom end of the movable pin 45 is connected to the movable member 43 , and the top end of the movable pin 45 extends out of the elastic member avoidance hole 441 and extends into the mounting hole 21 .

[0062] In one embodiment, referring to Figures 7 to 9 A contact protrusion 442 is provided on the inner side surface of the top transverse section of the elastic member 44 . The length direction of the contact protrusion 442 is consistent with the moving direction of the moving member 43 , and the contact protrusion 442 abuts against the top surface of the moving member 43 .

[0063] The number of the contact protrusions 442 can be one or more according to actual needs. When there are more than one contact protrusion 442, the contact protrusions 442 are arranged side by side along a direction perpendicular to the moving direction of the moving member 43. Figure 7 As shown in FIG. 1 , when the moving direction of the moving member 43 is the left-right direction, the two contact protrusions 442 are arranged side by side on the inner side surface of the top transverse section of the elastic member 44 along the front-back direction.

[0064] In this embodiment, the contact protrusion 442 abuts against the top surface of the moving member 43 , and the contact protrusion 442 can reduce the contact area with the moving member 43 , so as to reduce the friction force of the moving member 43 overcoming the elastic member 44 when the moving member 43 moves.

[0065] In one embodiment, referring to Figures 7 to 9 The driving member 42 adopts a U-shaped structure, the horizontal section of the driving member 42 is fixed to the top of the piezoelectric block 41, and the tops of the two vertical sections of the driving member 42 are in contact with the bottom of the moving member 43.

[0066] In one embodiment, the axial direction of the movable pin 45 is parallel to the axis, that is, the axial direction of the movable pin 45 is the up-down direction. The linear motion direction of the movable member 43 is parallel to the tangential direction of the movable seat when rotating, and the length direction of the mounting hole 21 is consistent with the linear motion direction of the movable member 43.

[0067] In one embodiment, referring to Figure 6 The base 10 is provided with a mounting groove 11 , and the driving mechanism 40 , namely the piezoelectric mechanism, is mounted in the mounting groove 11 .

[0068] In a specific implementation, the elastic member 44 of the piezoelectric mechanism is fixedly connected to the mounting groove 11 in the base. Preferably, the bottom horizontal section or vertical section of the elastic member 44 is fixedly connected to the mounting groove 11.

[0069] In one embodiment, the piezoelectric block 41 is powered by an external circuit or by a built-in circuit in the base 10 .

[0070] In one embodiment, referring to Figure 1 , Figure 2 and Fig.10 A fixing hole 31 is provided on the radial outer side of the blade 30 .

[0071] Reference Figures 1 to 4 , Figure 6 A supporting protrusion 12 is provided on the base 10, and the movable seat 20 is arranged around the outside of the supporting protrusion 12. A fixing pin 13 is provided at the top of the supporting protrusion 12. The fixing pin 13 is rotatably connected to the fixing hole 31, so that the radial outer side of the blade 30 is rotatably connected to the supporting protrusion 12 of the base 10 around the axial direction (that is, the up and down direction) of the fixing pin 13.

[0072] The number of the fixing pins 13 is not less than the number of the 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 the fixing pins 13 is also six.

[0073] A plurality of fixing pins 13 are preferably uniformly arranged on the top of the supporting protrusion 12 along the circumferential direction.

[0074] The fixing hole 31 is a circular hole that is rotatably connected to the fixing pin shaft 13 .

[0075] In one embodiment, referring to Figure 1 , Figure 2 and Fig.10 , a movable hole 32 is provided on the blade 30. Figures 1 to 4 A movable pin 22 is provided at the top of the movable seat 20, and 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 in a direction parallel to the axis, thereby changing the diameter of the aperture adjustment hole 30a.

[0076] The number of the movable pins 22 is not less than the number of the 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 the movable pins 22 is also six.

[0077] A plurality of movable pins 22 are preferably evenly arranged on the top of the movable seat 20 along the circumferential direction.

[0078] In one embodiment, referring to Figure 1 , Figure 2 and Fig.10 , two adjacent blades 30 are arranged in a staggered and overlapping manner.

[0079] For example, when there are six blades 30 , three blades 30 that are spaced apart are located below three other blades 30 that are spaced apart, and adjacent blades 30 are partially overlapped.

[0080] In one embodiment, referring to Fig.10 The radial inner end of the blade 30 is a wedge-shaped portion 33, and at least one of the two side walls of the wedge-shaped portion 33 is an arc surface 33a and is close to the lens avoidance hole 50, so that the plurality of blades 30 surround a quasi-circular aperture adjustment hole 30a.

[0081] In one embodiment, the movable hole 32 is an arc-shaped hole.

[0082] The curvature of the arc-shaped hole is preferably consistent with the curvature of the arc-shaped surface.

[0083] The movable hole 32 is more preferably an arc-shaped hole extending along the involute direction of the lens avoidance hole 50 .

[0084] In one embodiment, the base 10 , the supporting protrusion 12 and the movable seat 20 are all annular structures.

[0085] Therefore, the movable seat 20 is sleeved on the outer side of the supporting protrusion 12 and is located on the base 10 . The movable seat 20 can rotate on the base 10 around the outer side of the supporting protrusion 12 .

[0086] Of course, the base 10 , the supporting protrusion 12 and the movable seat 20 may also be other structures, such as a polygonal structure in outer contour. However, corresponding holes are opened in the middle of the base 10 , the supporting protrusion 12 and the movable seat 20 to form a lens avoidance hole 50 .

[0087] In one embodiment, the base 10 and the supporting protrusion 12 are made in one piece.

[0088] In one embodiment, referring to Figure 1 to Figure 2 An aperture disk 60 is installed on the fixed pin shaft 13 at the top of the supporting protrusion 12. The aperture disk 60 is located between the supporting protrusion 12 and the plurality of blades 30. The center hole of the aperture disk 60 is the aperture limiting hole.

[0089] The center hole of the aperture disk 60 is the aperture hole with the largest range, and the maximum range of the aperture hole is limited by the aperture disk 60; at the same time, the aperture disk 60 has a certain wear-resistant effect to prevent the movement of the blades 30 from rubbing against the base 10.

[0090] In one embodiment, referring to Figures 1 to 4 , Figure 6 A plurality of fixing protrusions 14 are arranged along the circumferential direction on the edge of the base 10 . The fixing protrusions 14 are located outside the movable seat 20 . A fixing column 15 is arranged on the top of the fixing protrusion 14 .

[0091] The lens aperture adjustment device further includes a top cover 70, which is fixedly connected to the fixing column 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 a lens avoidance hole 50 along the axis to match the lens, that is, a top cover hole is also provided in the middle of the top cover 70, and the aperture of the top cover hole is not less than the aperture of the lens avoidance hole 50.

[0092] The movable seat 20, the plurality of blades 30 and the driving mechanism 40 are all arranged in the movable space, and the movable seat 20 and the plurality of blades 30 can rotate in the movable space.

[0093] One or more fixing posts 15 at the top of the fixing protrusion 14 can be provided as required.

[0094] In one embodiment, referring to Figure 4 and Figure 6 A groove is provided inside part or all of the fixed protrusions 14 , and a ball 80 is provided inside part or all of the grooves. When the movable seat 20 is installed on the base 10 , an inner wall of one side of the movable seat 20 contacts the ball 80 and rotates under the action of the driving mechanism 40 .

[0095] The design of the ball bearing 80 can reduce the friction force when the movable seat 20 rotates.

[0096] In one embodiment, referring to Figure 4and Figure 6 The ball 80 is disposed in a groove on one side of the base 10 , and the driving mechanism 40 is located on the base 10 between two adjacent fixing protrusions 14 having the ball 80 .

[0097] In this embodiment, a groove and a ball 80 are provided on one side of the base, and a ball 80 is not provided on the other side, or no groove and ball 80 are provided, which allows the movable seat 20 to be arranged close to the ball 80 under the limiting effect of the movable pin 45, so as to realize the rotation action of the movable seat 20 after contacting the ball 80. This design can reduce the number of balls 80 and reduce the overall production cost.

[0098] For example Figure 6 As shown in FIG. 1 , four fixing protrusions 14 are arranged along the circumferential direction on the edge of the base 10, and a groove is arranged inside each fixing protrusion 14. Balls 80 are installed in two adjacent grooves, and no balls 80 are arranged in the other two grooves. The installation groove 11 for installing the driving mechanism 40 is located between the two grooves in which the balls 80 are installed.

[0099] Of course, in actual design, each fixing protrusion 14 may be provided with a groove inside, each groove may be provided with a ball 80, and the driving mechanism 40 may be located on the base 10 between any two adjacent fixing protrusions 14. This makes the installation of the movable seat 20 more stable and has better structural stability.

[0100] The preferred embodiments of the present invention have been described in detail above, but it should be understood that after reading the above teachings of the present invention, those skilled in the art may make various changes or modifications to the present invention. These equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A lens aperture adjustment device, characterized in that: The lens aperture adjustment device comprises: Base; A movable seat, the movable seat is rotatably arranged on the base around an axis, the movable seat and the base are provided with a lens avoidance hole matched with the lens along the axis, and a mounting hole is provided at the bottom end of the movable seat; A plurality of blades, wherein the plurality of blades are arranged around the circumference of the lens avoidance hole and are located above the base and the movable seat, wherein the radial outer sides of the plurality of blades are rotatably connected to the base around a direction parallel to the axis, and the plurality of blades are arranged in a ring shape and the radial inner sides thereof form an aperture adjustment hole with an adjustable diameter, and when the movable seat rotates around the axis to drive the plurality of blades to rotate, the diameter of the aperture adjustment hole gradually increases or decreases; The driving mechanism adopts a piezoelectric mechanism, and the piezoelectric mechanism includes a piezoelectric block, a driving member, a moving member, an elastic member and a moving pin shaft. The driving member is fixed on the top of the piezoelectric block, and the moving member is located above the driving member. The elastic member gives the moving member a downward tendency so that the bottom end of the moving member abuts against the top end of the driving member. The moving member is connected to the moving pin shaft, and the moving pin shaft extends into the mounting hole. When the piezoelectric block moves, the driving member drives the moving member to move linearly, thereby driving the moving pin shaft to push the movable seat to rotate in the mounting hole.

2. The lens aperture adjustment device according to claim 1, characterized in that: The elastic member adopts an inverted U-shaped structure, the piezoelectric block, the driving member and the moving member are all arranged in the elastic member, the bottom end of the piezoelectric block is fixed to the inner side of the bottom end transverse section of the elastic member, the inner side of the top end transverse section of the elastic member abuts against the moving member, and the moving pin extends out of the elastic member; And / or, the driving member adopts a U-shaped structure, the horizontal section of the driving member is fixed to the top of the piezoelectric block, and the tops of the two vertical sections of the driving member are in contact with the bottom of the moving member; And / or, the axial direction of the movable pin is parallel to the axis, the linear motion direction of the movable member is parallel to the tangential direction of the movable seat when rotating, and the length direction of the mounting hole is consistent with the linear motion direction of the movable member; And / or, a mounting groove is provided on the base, and the piezoelectric mechanism is installed in the mounting groove; And / or, the piezoelectric block is powered by an external circuit or by a built-in circuit in the base.

3. The lens aperture adjustment device according to claim 2, characterized in that: An elastic member avoidance hole communicating with the inside and outside is provided on the top transverse section of the elastic member, the bottom end of the movable pin is connected to the movable member, and the top end of the movable pin extends out of the elastic member avoidance hole and extends into the mounting hole; And / or, a contact protrusion is provided on the inner side surface of the top transverse section of the elastic member, the length direction of the contact protrusion is consistent with the moving direction of the moving member, and the contact protrusion abuts against the top surface of the moving member.

4. The lens aperture adjustment device according to claim 1, characterized in that: A fixing hole is arranged on the radial outer side of the blade, a supporting protrusion is arranged on the base, the movable seat ring is arranged on the outer side of the supporting protrusion, a fixing pin is arranged on the top of the supporting protrusion, and the fixing pin is rotatably connected with the fixing hole; And / or, a movable hole is provided on the blade, and a movable pin is provided on the top of the movable seat, and 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 in a direction parallel to the axis, thereby changing the diameter of the aperture adjustment hole.

5. The lens aperture adjustment device according to claim 4, 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 fixed pin shaft at the top of the supporting protrusion, the aperture disk is located between the supporting protrusion and a plurality of blades, and the center hole of the aperture disk is the aperture limiting hole.

6. The lens aperture adjustment device according to claim 5, characterized in that: The radial inner end of the blade is a wedge-shaped portion, at least one of the two side walls of the wedge-shaped portion is an arc-shaped surface and is close to the lens avoidance hole, so that a plurality of the blades form a quasi-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 avoidance hole.

7. The lens aperture adjustment device according to any one of claims 1 to 6, characterized in that: Two adjacent blades are arranged in a staggered and overlapping manner; And / or, the radial inner end of the blade is a wedge-shaped portion, at least one of the two side walls of the wedge-shaped portion is an arc-shaped surface and is close to the lens avoidance hole, so that a plurality of the blades form a quasi-circular aperture adjustment hole.

8. The lens aperture adjustment device according to any one of claims 1 to 6, characterized in that: The edge of the base is provided with a plurality of fixing protrusions along the circumferential direction, the fixing protrusions are located outside the movable seat, and the top of the fixing protrusions is provided with fixing columns; The lens aperture adjustment device further comprises a top cover, the top cover is fixedly connected to the fixing column, a movable space is formed between the top cover and the base, and the top cover, the movable seat and the base are provided with the lens avoidance hole matched with the lens along the axis; The movable seat, the plurality of blades and the driving mechanism are all arranged in the movable space, and the movable seat and the plurality of blades can rotate in the movable space.

9. The lens aperture adjustment device according to any one of claims 1 to 6, characterized in that: A plurality of fixed protrusions are circumferentially arranged on the edge of the base, the fixed protrusions are located on the outer side of the movable seat, grooves are arranged on the inner side of some or all of the fixed protrusions, balls are arranged in some or all of the grooves, and when the movable seat is installed on the base, an inner wall on one side of the movable seat contacts with the balls and rotates under the action of the driving mechanism.

10. The lens aperture adjustment device according to claim 9, characterized in that: The ball bearing is arranged in the groove on one side of the base, and the driving mechanism is located on the base between two adjacent fixing protrusions having the ball bearing; Alternatively, the ball bearings are disposed in each of the grooves, and the driving mechanism is located on the base between any two adjacent fixing protrusions.

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