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 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 blades, when the driving mechanism drives the movable seat to rotate, the blades rotate along with the movable seat, the size of an aperture can be well adjusted, and the purpose of changing the aperture is achieved.

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, comprising:

[0006] Base;

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

[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 adopts a piezoelectric mechanism, which comprises a piezoelectric block, a driving piece, a moving piece, an elastic piece and a moving pin shaft, the driving piece is fixed at the top end of the piezoelectric block, the moving piece is above the driving piece, the moving piece is given a downward trend by the elastic piece so that the bottom end of the moving piece abuts against the top end of the driving piece, the moving piece is connected to the moving pin shaft, the moving pin shaft extends into the mounting hole, and when the piezoelectric block operates, the driving piece drives the moving piece to move linearly, and in turn drives the moving pin shaft to push the movable seat to rotate in the mounting hole.

[0010] Optionally, the elastic piece adopts a reverse U-shaped structure, the piezoelectric block, the driving piece and the moving piece are arranged in the elastic piece, the bottom end of the piezoelectric block is fixed to the inner side of the bottom end horizontal section of the elastic piece, the top end horizontal section of the elastic piece abuts against the moving piece, and the moving pin shaft extends out of the elastic piece.

[0011] Optionally, an elastic piece avoiding hole communicating between the inside and the outside is arranged on the top end horizontal section of the elastic piece, the bottom end of the moving pin shaft is connected to the moving piece, the top end of the moving pin shaft extends out of the elastic piece avoiding hole and extends into the mounting hole.

[0012] Optionally, a contact protrusion is arranged on the inner side of the top end horizontal section of the elastic piece, the length direction of the contact protrusion is consistent with the moving direction of the moving piece, and the contact protrusion abuts against the top surface of the moving piece.

[0013] Optionally, the driving piece adopts a U-shaped structure, the horizontal section of the driving piece is fixed at the top end of the piezoelectric block, and the top ends of the two vertical sections of the driving piece abut against the bottom end of the moving piece.

[0014] Optionally, the axial direction of the moving pin shaft is parallel to the axis, the linear movement direction of the moving piece is parallel to the tangent direction when the movable seat rotates, and the length direction of the mounting hole is consistent with the linear movement direction of the moving piece.

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

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

[0017] Optionally, the radial outer side of the blade is provided with a fixing hole, the base is provided with a supporting protrusion, the movable seat is arranged outside the supporting protrusion, the top end of the supporting protrusion is provided with a fixing pin shaft, and the fixing pin shaft is rotationally connected with the fixing hole.

[0018] Optionally, the leaf blade is provided with a movable hole, and the movable seat top end is provided with a movable pin shaft connected with the movable hole on the leaf blade, when the movable seat rotates, the movable pin shaft drives the leaf blade to rotate around a direction parallel to the axis, so as to change the diameter of the aperture adjusting hole.

[0019] Optionally, the adjacent two leaf blades are staggered and overlapped.

[0020] Optionally, the leaf blade radial inner end is a wedge-shaped part, at least one of the two side walls of the wedge-shaped part is an arc surface and is close to the lens avoiding hole, so that the leaf blades surround a circular aperture adjusting hole.

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

[0022] Optionally, the bending degree of the arc hole is consistent with the bending degree of the arc surface.

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

[0024] Optionally, the base, the support protrusion and the movable seat are circular ring structures.

[0025] Optionally, a fixed pin shaft on the top end of the support protrusion is installed with an aperture disc, the aperture disc is located between the support protrusion and the leaf blades, and a central hole of the aperture disc is an aperture limiting hole.

[0026] Optionally, the base edge is provided with a plurality of fixed protrusions in the circumferential direction, the fixed protrusions are located outside the movable seat, and the fixed protrusions are provided with fixed columns at the top ends;

[0027] The lens aperture adjusting device further comprises a top cover fixedly connected with the fixed columns, an activity 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 avoiding hole matched with the lens along the axis;

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

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

[0030] Optionally, the rolling ball is arranged in the groove on one side of the base, and the driving mechanism is arranged on the base between two adjacent fixed protrusions with rolling balls.

[0031] Optionally, the rolling ball is arranged in the groove on one side of the base, and the driving mechanism is arranged on the base between two adjacent fixed protrusions with rolling balls.

[0032] Beneficial effects: the utility model has following at least one or more advantages:

[0033] 1, the utility model discloses a plurality of leaf's surrounding diameter adjustable aperture adjusting hole, when driving driving mechanism drives movable seat rotation, leaf rotates, can better adjust the size of aperture, realizes variable aperture purpose.

[0034] 2, the driving mechanism of the utility model adopts piezoelectric mechanism, and the piezoelectric block will stretch after electrification, and the driving part moves along with the top end surface of the piezoelectric block and moves linearly under the action of friction, and then the moving pin shaft connected with the moving part moves linearly, the movable seat is pushed to rotate in the mounting hole in the bottom end of the movable seat through the moving pin shaft, to realize the rotary action of the movable seat. The utility model adopts piezoelectric mechanism, compared with the driving device of traditional magnet and coil cooperation structure, the magnet and coil cooperation can produce magnetic field, and the magnetic field can possibly interfere with other electronic components in the mobile phone, and the piezoelectric mechanism does not interfere with other components such as lens motor, and the overall structure of the piezoelectric mechanism is simple and compact, and the overall volume of the lens aperture adjusting device is compressed.

[0035] 3, the central hole of the aperture disc is the maximum range aperture hole, and the maximum range of the aperture hole is limited by the aperture disc;Meanwhile, the aperture disc has certain wear resistance, to prevent the activity of the leaf and the friction of the base.

[0036] 4, the utility model discloses the rolling ball in the fixed protrusion inner side, can reduce the friction of movable seat rotary action. ACCURACY

[0037] Figure 1 It is a structural schematic diagram of the utility model;

[0038] Figure 2 It is an explosion map of Figure 1

[0039] Figure 3 It is the position relation diagram between the base and the movable seat of the utility model;

[0040] Figure 4 It is an explosion map of Figure 3

[0041] ​​Figure 5 It is a structural schematic view of the movable seat of the utility model;

[0042] Figure 6 It is an explosion view of the position relation of the base and the driving mechanism of the utility model;

[0043] Figure 7 It is a structural schematic view of the driving mechanism of the utility model;

[0044] Figure 8 It is an explosion view of the utility model; Figure 7

[0045] Figure 9 It is another angle schematic view of the utility model; Figure 8

[0046] Figure 10 It is an explosion view of the position relation of the plurality of blades arranged in a ring shape of the utility model. DETAILED DESCRIPTION

[0047] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, so that the purpose, characteristics and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the utility model, but only to illustrate the essential spirit of the technical scheme of the utility model.

[0048] In the following description, for the purpose of illustrating various disclosed embodiments, specific details are set forth to provide a thorough understanding of various disclosed embodiments. However, one skilled in the relevant art will recognize that the embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring the description of the embodiments.

[0049] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. In addition, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0050] In the following description, in order to clearly show the structure and working mode of the utility model, many directional words will be used for description, but the words of "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", "down" and the like should be understood as convenient words, and should not be understood as limiting words.

[0051] Referring to Figures 1 to 10 ​​The utility model embodiment provides a lens aperture adjusting device, which is used for sleeving on a lens to adjust the aperture size. The lens aperture adjusting device comprises a base 10, a movable seat 20, a plurality of blades 30 and a driving mechanism 40.

[0052] The base 10 is used for being fixed on the shell of a lens motor.

[0053] The movable seat 20 is rotatably arranged on the base 10 around an axis, and the bottom end of the movable seat 20 is provided with a mounting hole 21. The movable seat 20 and the base 10 are provided with a lens avoiding hole 50 matched with a lens on the lens motor along the axis, so that light can enter the lens, and the lens avoiding hole 50 is usually circular. The lens avoiding hole 50 is located at the central position of the movable seat 20 and the base 10, and the axis is the center line of the combination of the base 10 and the movable seat 20, that is, the axis of the lens avoiding hole 50, for example Figure 5 the center line A in the up-down direction.

[0054] The plurality of blades 30 are arranged around the circumference of the lens avoiding hole 50 and above the base 10 and the movable seat 20, the radially outer side of the plurality of blades 30 is rotatably connected to the base 10 around a direction parallel to the axis, the plurality of blades 30 are arranged in a ring shape and the radially inner side surrounds a diameter-adjustable aperture adjusting hole 30a, the movable seat 20 is connected with each blade 30, the movable seat 20 is driven to rotate around the axis by the driving mechanism 40, and then the plurality of blades 30 are driven to rotate, so that the radially inner side of the blade 30 is away from or close to the axis, and the diameter of the aperture adjusting hole 30a gradually increases or decreases. Since the opening size of the aperture adjusting hole 30a changes, the light entering the lens changes, thereby realizing the shielding of the lens and the adjustment operation of the lens aperture.

[0055] Referring to Figures 7 to 9 , the driving mechanism 40 adopts a piezoelectric mechanism, and the piezoelectric mechanism comprises a piezoelectric block 41, a driving piece 42, a moving piece 43, an elastic piece 44 and a moving pin shaft 45.

[0056] The driving piece 42 is fixed at the top end of the piezoelectric block 41, the moving piece 43 is located above the driving piece 42, the moving piece 43 is given a downward trend by the elastic piece 44, so that the bottom end of the moving piece 43 abuts against the top end of the driving piece 42, the moving piece 43 is connected with the moving pin shaft 45, the moving pin shaft 45 extends into the mounting hole 21, and when the driving piece 42 moves with the piezoelectric block 41, the moving piece 43 is driven to move linearly, and then the moving pin shaft 45 is driven to push the movable seat to rotate in the mounting hole 21.

[0057] The utility model discloses a drive mechanism adopts piezoelectric mechanism, and through piezoelectric block 41 electrification will carry out stretch action, and drive piece 42 moves with piezoelectric block 41 top end face and under the friction force effect drives moving piece 43 to carry out linear movement, and further makes the linear movement of the moving pin shaft 45 connected with moving piece 43, and the moving pin shaft 45 is in the installation hole 21 of the bottom end of movable seat and promotes movable seat to rotate, thereby realizing the rotary action of movable seat. The utility model discloses piezoelectric mechanism, compared with the drive device of traditional magnet and coil cooperation structure, magnet and coil cooperation can produce magnetic field, and the magnetic field can possibly interfere with other electronic components such as cell -phone internal problem, and piezoelectric mechanism can not interfere with other components such as lens motor problem, and piezoelectric mechanism whole structure is simple and compact, and the overall volume of lens aperture adjusting device is compressed.

[0058] In an embodiment, referring to Figures 7 to 9 , the elastic member 44 adopts a shape similar to an inverted U, the piezoelectric block 41, the drive piece 42 and the moving piece 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 end horizontal section of the elastic member 44, the top end horizontal section of the elastic member 44 abuts against the moving piece 43, and the moving pin shaft 45 extends out of the elastic member 44.

[0059] The elastic member 44 of the embodiment adopts a horizontally arranged U shape, and the top end horizontal section gives the moving piece 43 inside the top end horizontal section a downward tendency.

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

[0061] In an embodiment, referring to Figures 7 to 9 , the top end horizontal section of the elastic member 44 is provided with an elastic member avoiding hole 441 that is in communication between the inside and the outside, the bottom end of the moving pin shaft 45 is connected to the moving piece 43, the top end of the moving pin shaft 45 extends out of the elastic member avoiding hole 441 and extends into the installation hole 21.

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

[0063] The number of the contact protrusions 442 can be set to one or several according to actual needs, and when the contact protrusions 442 are several, the several contact protrusions 442 are arranged side by side along the direction perpendicular to the moving direction of the moving piece 43. For example Figure 7 , as shown in the figure, when the moving direction of the moving piece 43 is the left-right direction, two contact protrusions 442 are arranged side by side on the inner side surface of the top end horizontal section of the elastic member 44 along the front-rear direction.

[0064] The contact protrusion 442 can reduce the contact area with the moving piece 43, so as to reduce the friction force of the elastic piece 44 when the moving piece 43 moves.

[0065] In an embodiment, referring to Figures 7 to 9 , the driving piece 42 has a U-shaped structure, the horizontal section of the driving piece 42 is fixed at the top end of the piezoelectric block 41, and the top ends of the two vertical sections of the driving piece 42 abut against the bottom end of the moving piece 43.

[0066] In an embodiment, the axial direction of the moving pin 45 is parallel to the axis, that is, the axial direction of the moving pin 45 is the up-down direction. The linear motion direction of the moving piece 43 is parallel to the tangent direction when the movable seat rotates, and the length direction of the mounting hole 21 is consistent with the linear motion direction of the moving piece 43.

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

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

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

[0070] In an embodiment, referring to Figure 1 , Figure 2 and Figure 10 , the radial outer side of the blade 30 is provided with a fixed hole 31.

[0071] Referring to Figures 1 to 4 , Figure 6 , the base 10 is provided with a support protrusion 12, the movable seat 20 is annularly arranged outside the support protrusion 12, the top end of the support protrusion 12 is provided with a fixed pin 13, and the fixed pin 13 is rotationally connected with the fixed hole 31, so that the radial outer side of the blade 30 is rotationally connected with the support protrusion 12 of the base 10 along the axial direction (that is, the up-down direction) of the fixed pin 13.

[0072] The number of the fixed pins 13 is not less than the number of the blades 30, so that one blade 30 can be rotationally connected with one corresponding fixed pin 13. For example, when the number of the blades 30 is six, the number of the fixed pins 13 is also six.

[0073] Preferably, the plurality of fixed pins 13 are uniformly arranged at the top end of the support protrusion 12 in the circumferential direction.

[0074] The fixed hole 31 is a circular hole for rotationally connecting with the fixed pin 13.

[0075] In an embodiment, referring to Figure 1 , Figure 2 and Figure 10 , the leaf blades 30 are provided with active holes 32. Referring to Figures 1 to 4 , the top end of the active seat 20 is provided with active pin shafts 22, which are connected with the active holes 32 on the leaf blades 30. When the active seat 20 rotates, the active pin shafts 22 drive the leaf blades 30 to rotate around a direction parallel to the axis, so as to change the diameter of the aperture adjusting hole 30a.

[0076] The number of the active pin shafts 22 is not less than the number of the leaf blades 30, so that one leaf blade 30 can be connected with one corresponding active pin shaft 22. For example, when the leaf blades 30 are six, the number of the active pin shafts 22 is also six.

[0077] The active pin shafts 22 are preferably uniformly arranged on the top end of the active seat 20 in the circumferential direction.

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

[0079] For example, when there are six leaf blades 30, every three leaf blades 30 are located below the other three leaf blades 30, and the adjacent leaf blades 30 have partial overlap.

[0080] In an embodiment, referring to Figure 10 , the radially inner end of the leaf blade 30 is a wedge-shaped portion 33, 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 avoiding hole 50, so that the plurality of leaf blades 30 enclose a circular aperture adjusting hole 30a.

[0081] In an embodiment, the active hole 32 is an arc hole.

[0082] The bending degree of the arc hole is preferably consistent with the bending degree of the arc surface.

[0083] The active hole 32 is more preferably an arc hole extending along the involute direction of the lens avoiding hole 50.

[0084] In an embodiment, the base 10, the support protrusion 12 and the active seat 20 are all circular ring structures.

[0085] Therefore, the active seat 20 is sleeved outside the support protrusion 12 and located on the base 10, and the active seat 20 can rotate on the base 10 around the outside of the support protrusion 12.

[0086] Of course, the base 10, the supporting protrusion 12 and the movable seat 20 can also be other structures, for example, polygonal structures, but the middle part of the base 10, the supporting protrusion 12 and the movable seat 20 are all provided with corresponding holes to form the lens avoiding hole 50.

[0087] In an embodiment, the base 10 and the supporting protrusion 12 are integrally formed.

[0088] In an embodiment, referring to Figures 1 to 2 , the fixed pin shaft 13 at the top end of the supporting protrusion 12 is provided with an aperture disc 60, the aperture disc 60 is located between the supporting protrusion 12 and the plurality of blades 30, and the central hole of the aperture disc 60 is an aperture limiting hole.

[0089] The central hole of the aperture disc 60 is the maximum range aperture hole, and the maximum range of the aperture hole is limited by the aperture disc 60; at the same time, the aperture disc 60 has a certain wear-resistant effect to prevent the friction between the movement of the blades 30 and the base 10.

[0090] In an embodiment, referring to Figures 1 to 4 , Figure 6 , the edge of the base 10 is provided with a plurality of fixed protrusions 14 in the circumferential direction, the fixed protrusions 14 are located outside the movable seat 20, and the top end of the fixed protrusions 14 is provided with a fixed column 15.

[0091] The lens aperture adjusting device further comprises a top cover 70, the top cover 70 is fixedly connected with the fixed column 15, and the top cover 70 and the base 10 form a movable space therebetween. The top cover 70, the movable seat 20 and the base 10 are provided with a lens avoiding hole 50 matched with the lens along the axis, that is, the middle part of the top cover 70 is also provided with a top cover hole, and the aperture diameter of the top cover hole is not less than the aperture diameter of the lens avoiding 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] The fixed column 15 at the top end of the fixed protrusion 14 can be provided with one or a plurality of fixed columns according to needs.

[0094] In an embodiment, referring to Figure 4 and Figure 6 , part or all of the inner sides of the fixed protrusions 14 are provided with grooves, and part or all of the grooves are provided with rolling balls 80. When the movable seat 20 is installed on the base 10, one side of the inner wall of the movable seat 20 is in contact with the rolling balls 80 and rotates under the action of the driving mechanism 40.

[0095] The design of the rolling balls 80 can reduce the friction when the movable seat 20 rotates.

[0096] In an embodiment, referring to Figure 4And Figure 6 The ball 80 is arranged in the groove on one side of the base 10, and the driving mechanism 40 is arranged on the base 10 between two adjacent fixed protrusions 14 with the ball 80.

[0097] In the embodiment, the groove and the ball 80 are arranged on one side of the base, and the other side is not provided with the ball 80 or the groove, so that the movable seat 20 is arranged in the direction close to the ball 80 under the limiting action of the moving pin shaft 45, and the rotating action of the movable seat 20 after abutting against the ball 80 is realized. The design can reduce the number of balls 80 and reduce the overall production cost.

[0098] For example, as shown in Figure 6 The four fixed protrusions 14 are arranged on the edge of the base 10 in the circumferential direction, the inner side of each fixed protrusion 14 is provided with a groove, the ball 80 is arranged in the two adjacent grooves, and the other two grooves are not provided with the ball 80. The mounting groove 11 of the driving mechanism 40 is arranged between the two grooves with the ball 80.

[0099] Of course, in the actual design, the inner side of each fixed protrusion 14 can be provided with a groove, and the ball 80 is arranged in each groove, and the driving mechanism 40 is arranged on the base 10 between any two adjacent fixed protrusions 14. The design makes the installation of the movable seat 20 more stable and has better structural stability.

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

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, the bottom end of the movable seat being provided with a mounting hole; a plurality of blades, the plurality of blades being annularly arranged above the base and the movable seat along the circumferential direction of the lens avoiding hole, the radially outer side of the plurality of blades being rotatably connected to the base along a direction parallel to the axis, the plurality of blades being annularly arranged and the radially inner side thereof forming a diameter-adjustable aperture adjusting hole, the diameter of the aperture adjusting hole gradually increasing or decreasing when the movable seat is rotated along the axis to drive the plurality of blades to rotate; a driving mechanism, the driving mechanism being a piezoelectric mechanism, the piezoelectric mechanism comprising a piezoelectric block, a driving piece, a moving piece, an elastic piece and a moving pin shaft, the driving piece being fixed at the top end of the piezoelectric block, the moving piece being arranged above the driving piece, the moving piece being given a downward trend by the elastic piece so that the bottom end of the moving piece abuts against the top end of the driving piece, the moving piece being connected to the moving pin shaft, the moving pin shaft extending into the mounting hole, the driving piece driving the moving piece to move linearly when the piezoelectric block operates, and in turn driving the moving pin shaft to push the movable seat to rotate in the mounting hole.

2. The lens aperture adjusting apparatus according to claim 1, wherein The elastic piece has a reverse U-shaped structure, the piezoelectric block, the driving piece and the moving piece are arranged in the elastic piece, the bottom end of the piezoelectric block is fixed to the inner side of the bottom end of the elastic piece, the top end of the elastic piece abuts against the moving piece, and the moving pin shaft extends out of the elastic piece. And / or, the driving piece has a U-shaped structure, the horizontal section of the driving piece is fixed at the top end of the piezoelectric block, and the top ends of the two vertical sections of the driving piece abut against the bottom end of the moving piece. And / or, the axis of the moving pin shaft is parallel to the axis, the linear movement direction of the moving piece is parallel to the tangent direction when the movable seat rotates, and the length direction of the mounting hole is consistent with the linear movement direction of the moving piece. And / or, the base is provided with a mounting groove, and the piezoelectric mechanism is mounted in the mounting groove. And / or, the piezoelectric block is powered by an external circuit or a built-in circuit in the base.

3. The lens aperture adjusting apparatus according to claim 2, wherein The top end of the elastic piece is provided with an elastic piece avoiding hole in communication with the inside and outside, the bottom end of the moving pin shaft is connected to the moving piece, and the top end of the moving pin shaft extends out of the elastic piece avoiding hole and extends into the mounting hole. And / or, the top end of the elastic piece is provided with a contact protrusion on the inner side, the length direction of the contact protrusion is consistent with the movement direction of the moving piece, and the contact protrusion abuts against the top surface of the moving piece.

4. The lens aperture adjusting apparatus according to claim 1, wherein The radially outer side of the blade is provided with a fixing hole, the base is provided with a supporting protrusion, the movable seat is annularly arranged outside the supporting protrusion, the top end of the supporting protrusion is provided with a fixing pin shaft, and the fixing pin shaft is rotatably connected to the fixing hole. And / or, the leaf blade is provided with a movable hole, the movable seat top end is provided with a movable pin shaft, the movable pin shaft is connected with the movable hole on the leaf blade, when the movable seat rotates, the movable pin shaft drives the leaf blade to rotate around the direction parallel to the axis, so as to change the diameter of the aperture adjusting hole.

5. The lens aperture adjusting apparatus according to claim 4, wherein The movable hole is an arc-shaped hole. And / or, the base, the supporting protrusion and the movable seat are circular ring structures. And / or, the fixing pin shaft on the top end of the supporting protrusion is provided with an aperture disc, the aperture disc is located between the supporting protrusion and the leaf blades, and the central hole of the aperture disc is an aperture limiting hole.

6. The lens aperture adjusting apparatus according to claim 5, wherein The radially inner end of the leaf blade is a wedge-shaped part, at least one of the two side walls of the wedge-shaped part is an arc surface and is close to the lens avoiding hole, so that the leaf blades surround a circular aperture adjusting hole; the bending degree of the arc-shaped hole is consistent with the bending degree of the arc surface. And / or, the movable hole is an arc-shaped hole extending along the involute direction of the lens avoiding hole.

7. The lens aperture adjusting apparatus according to any one of claims 1 to 6, wherein The adjacent two leaf blades are staggered and overlapped. And / or, the radially inner end of the leaf blade is a wedge-shaped part, at least one of the two side walls of the wedge-shaped part is an arc surface and is close to the lens avoiding hole, so that the leaf blades surround a circular aperture adjusting hole.

8. The lens aperture adjusting apparatus according to any one of claims 1 to 6, wherein The edge of the base is provided with a plurality of fixed protrusions in the circumferential direction, the fixed protrusions are located outside the movable seat, and the top end of the fixed protrusions is provided with a fixed column. The lens aperture adjusting device further comprises a top cover, the top cover is fixedly connected with the fixed column, an active 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 avoiding hole matched with the lens along the axis. The movable seat, the leaf blades and the driving mechanism are arranged in the active space, and the movable seat and the leaf blades can rotate in the active space.

9. The lens aperture adjusting apparatus according to any one of claims 1 to 6, wherein The edge of the base is provided with a plurality of fixed protrusions in the circumferential direction, the fixed protrusions are located outside the movable seat, and the inner side of part or all of the fixed protrusions is provided with a groove, and part or all of the grooves are provided with a ball, when the movable seat is installed on the base, one side of the inner wall of the movable seat is in contact with the ball and rotates under the action of the driving mechanism.

10. The lens aperture adjusting apparatus according to claim 9, wherein The ball is arranged in the groove on one side of the base, and the driving mechanism is located on the base between the adjacent two fixed protrusions with the ball. Or, the ball is arranged in each groove, and the driving mechanism is located on the base between any adjacent two fixed protrusions.

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