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 employs a piezoelectric mechanism, which includes a piezoelectric block, a friction rod, a movable component, and a movable pin. The friction rod is fixedly connected to the piezoelectric block, and the movable component abuts against the friction rod. The movable component is connected to the movable pin, which extends into the mounting hole. When the friction rod moves with the piezoelectric block, it performs a linear motion, which in turn drives the movable component to perform a linear motion, thereby causing the movable pin to push the movable seat to rotate within the mounting hole.

[0010] Optionally, the piezoelectric mechanism further includes an adsorption assembly, wherein the movable member abuts against the friction rod via the adsorption assembly. The adsorption assembly includes a magnetic conductor and a magnet disposed opposite to each other on two sides of the friction rod. One of the magnetic conductor and the magnet is disposed on the movable member, and the other of the magnetic conductor and the magnet abuts against the friction rod.

[0011] Optionally, the movable part is provided with an adsorption mounting groove, and the magnetic conductive part or the magnet is installed in the adsorption mounting groove.

[0012] Optionally, the side of the movable member that abuts against the friction rod has an abutting surface that mates with the outer surface of the friction rod.

[0013] Optionally, the magnet abuts against the friction rod, and the magnetic conductor is disposed within the movable member, the magnetic conductor having an inverted U-shaped structure.

[0014] Optionally, the base is provided with a mounting groove, and the piezoelectric mechanism is installed in the mounting groove.

[0015] Optionally, the mounting groove is provided with a magnet mounting groove, and the magnet is installed in the magnet mounting groove;

[0016] The piezoelectric mechanism also includes an adsorption iron sheet, which is disposed in the base and is connected to the magnet mounting groove and adsorbs onto the magnet.

[0017] Optionally, the adsorption iron sheet is pre-embedded in the base.

[0018] Optionally, the base has an annular groove at its bottom end, the adsorption iron sheet has an annular structure, the adsorption iron sheet is embedded in the annular groove, and the annular groove is connected to the magnet mounting groove.

[0019] Optionally, the piezoelectric mechanism further includes a counterweight block, which is fixedly connected to the piezoelectric block and located on the side away from the friction rod. The counterweight block is mounted on the base, and the piezoelectric block is mounted on the base via the counterweight block.

[0020] Optionally, the axial direction of the movable pin is parallel to the axis, the linear motion direction of the friction rod is parallel to the tangential direction when the movable seat rotates, and the length direction of the mounting hole is consistent with the linear motion direction of the friction rod.

[0021] Optionally, the piezoelectric block is powered by an external circuit or by the built-in wiring within the base.

[0022] Optionally, a fixing hole is provided on the radial outer side of the blade, a support protrusion is provided on the base, the movable seat ring is provided on the outer side of the support protrusion, and a fixing pin is provided at the top of the support protrusion, the fixing pin being rotatably connected to the fixing hole.

[0023] Optionally, the blade is provided with a movable hole, and the top of the movable seat is provided with a movable pin. The movable pin is connected to the movable hole on the blade. When the movable seat rotates, the movable pin drives the blade to rotate around a direction parallel to the axis, thereby causing the diameter of the aperture adjustment hole to change.

[0024] Optionally, two adjacent blades are staggered and stacked.

[0025] Optionally, the radially inner end of the blade is a wedge-shaped portion, and at least one of the two sidewalls of the wedge-shaped portion is an arc-shaped surface and close to the lens clearance hole, so that the plurality of blades form a near-circular aperture adjustment hole.

[0026] Optionally, the movable hole is an arc-shaped hole.

[0027] Optionally, the curvature of the arc-shaped hole is consistent with the curvature of the arc-shaped surface.

[0028] Optionally, the movable hole is an arc-shaped hole extending along the involute direction of the lens clearance hole.

[0029] Optionally, the base, the supporting protrusion, and the movable seat are all annular structures.

[0030] Optionally, an aperture disk is mounted on the fixing pin at the top of the support protrusion. The aperture disk is located between the support protrusion and several blades, and the central hole of the aperture disk is an aperture defining hole.

[0031] Optionally, the base edge is provided with a plurality of fixed protrusions along the circumferential direction, the fixed protrusions are located on the outside of the movable seat, and the top of the fixed protrusions is provided with a fixed post;

[0032] The lens aperture adjustment device also includes a top cover, which is fixedly connected to the fixed post. An movable space is formed between the top cover and the base. The top cover, the movable base, and the base are provided with lens clearance holes that cooperate with the lens along the axis.

[0033] The movable seat, the plurality of blades, and the drive mechanism are all disposed within the movable space, and the movable seat and the plurality of blades can rotate within the movable space.

[0034] Optionally, some or all of the fixed protrusions are provided with grooves on their inner sides, and some or all of the grooves are provided with balls. When the movable seat is installed on the base, one inner wall of the movable seat contacts the balls and rotates under the action of the drive mechanism.

[0035] Optionally, the ball is disposed in the groove on one side of the base, and the drive mechanism is located on the base between two adjacent fixed protrusions having the ball.

[0036] Optionally, each of the grooves is provided with a ball bearing, and the drive mechanism is located on the base between any two adjacent fixed protrusions.

[0037] Beneficial effects: This utility model has at least one or more of the following advantages:

[0038] 1. This utility model uses a number of blades to form an adjustable aperture hole. When the drive mechanism drives the movable seat to rotate, the blades rotate with it, which can effectively adjust the size of the aperture and achieve the purpose of a variable aperture.

[0039] 2. The driving mechanism of this utility model adopts a piezoelectric mechanism. It works by extending the piezoelectric block when energized, causing the friction rod to move linearly, which in turn drives the movable part to move linearly. This, in turn, pushes the movable seat to rotate via a movable pin in the mounting hole at the bottom of the movable seat, thus achieving the rotation of the movable seat. Compared to traditional drive devices using a magnet and coil, where the magnet and coil generate a magnetic field that may interfere with other electronic components inside the phone, the piezoelectric mechanism does not interfere with other components such as the lens motor. Furthermore, the piezoelectric mechanism has a simple and compact overall structure, reducing the overall size of the lens aperture adjustment device.

[0040] 3. The central hole of the aperture disk of this utility model is the aperture hole with the largest range. The aperture disk limits the maximum range of the aperture hole. At the same time, the aperture disk has a certain wear resistance to prevent the movement of the blades from rubbing against the base.

[0041] 4. The present invention installs ball bearings on the inner side of the fixed protrusion, which can reduce the friction during the rotation of the movable seat. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of this utility model;

[0043] Figure 2 for Figure 1 Exploded view;

[0044] Figure 3 This is a diagram showing the positional relationship between the base and the movable seat of this utility model;

[0045] Figure 4 for Figure 3 Exploded view;

[0046] Figure 5 for Figure 4 Another perspective illustration;

[0047] Figure 6 This is an exploded view showing the positional relationship between the base and the drive mechanism of this utility model.

[0048] Figure 7 This is a schematic diagram of the drive mechanism of this utility model;

[0049] Figure 8 for Figure 7 Exploded view;

[0050] Figure 9 This is an exploded view showing the positional relationship of several blades arranged in a ring shape according to this utility model. Detailed Implementation

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Reference Figures 1 to 9 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, a plurality of blades 30, and a drive mechanism 40.

[0056] The base 10 is used to fix it to the housing of the lens motor.

[0057] The movable base 20 is rotatably mounted on the base 10 about an axis, and a mounting hole 21 is provided at the bottom of the movable base 20. The movable base 20 and the base 10 are provided with a lens clearance hole 50 along their axis to mate with the lens on the lens motor, allowing light to enter the lens. The lens clearance hole 50 is typically circular. The lens clearance hole 50 is located at the center of the movable base 20 and the base 10, and this axis is the center line of the combined base 10 and the movable base 20, which is also the axis of the lens clearance hole 50. Figure 3 Centerline A in the vertical direction.

[0058] Several blades 30 are arranged circumferentially around the lens clearance aperture 50 and located above the base 10 and the movable seat 20. The radially outer sides of the blades 30 are rotatably connected to the base 10 in a direction parallel to the axis. The blades 30 are arranged in a ring shape, and their radially inner sides form an adjustable aperture adjustment aperture 30a. The movable seat 20 is connected to each blade 30. The drive mechanism 40 drives the movable seat 20 to rotate around the axis, thereby causing the blades 30 to rotate. As the blades 30 rotate, their radially inner sides move away from or closer to the axis, causing the diameter of the aperture adjustment aperture 30a to gradually increase or decrease. Because the opening size of the aperture adjustment aperture 30a changes, the light entering the lens changes accordingly, thus achieving lens obstruction and aperture adjustment.

[0059] Reference Figure 7 and Figure 8The drive mechanism 40 adopts a piezoelectric mechanism, which includes a piezoelectric block 41, a friction rod 42, a movable part 43, and a movable pin 44. The friction rod 42 is fixedly connected to the piezoelectric block 41, and the movable part 43 abuts against the friction rod 42. The movable part 43 is connected to the movable pin 44, which extends into the mounting hole 21. When the friction rod 42 moves with the piezoelectric block 41, the friction rod 42 moves linearly, which drives the movable part 43 to move linearly, and then drives the movable pin 44 to push the movable seat 20 to rotate in the mounting hole 21.

[0060] The drive mechanism 40 of this invention employs a piezoelectric mechanism. When the piezoelectric block 41 is energized, it extends, causing the friction rod 42 to move linearly. This, in turn, drives the movable part 43 to move linearly, which in turn pushes the movable seat 20 to rotate via the mounting hole 21 at the bottom of the movable seat 20 through the movable pin 45, thus achieving the rotational movement of the movable seat 20. Compared to traditional drive devices using a magnet and coil combination, which generate a magnetic field that may interfere with other electronic components inside the mobile phone, the piezoelectric mechanism avoids interference with other components such as the lens motor. Furthermore, the piezoelectric mechanism has a simple and compact overall structure, reducing the overall size of the lens aperture adjustment device.

[0061] In one embodiment, the piezoelectric mechanism further includes an adsorption component, wherein the movable member 43 abuts against the friction rod 42 via the adsorption component. The adsorption component includes a magnetically conductive member 45 and a magnet 46 disposed opposite to each other on two sides of the friction rod 42. One of the magnetically conductive member 45 and the magnet 46 is disposed on the movable member 43, and the other of the magnetically conductive member 45 and the magnet 46 abuts against the friction rod 42.

[0062] Reference Figure 7 and Figure 8 The magnetic conductor 45 and the magnet 46 are arranged opposite each other on the upper and lower sides of the friction rod 42. The movable part 43 is located above the friction rod 42 and abuts against the friction rod 42. The magnetic conductor 45 is arranged inside the movable part 43, and the magnet 46 abuts against the bottom end of the friction rod 42.

[0063] In this embodiment, under the magnetic force between the magnetic conductor 45 and the magnet 46, the bottom end of the movable part 43 abuts against the friction rod 42, increasing the friction between the two. When the piezoelectric block 41 is energized and deformed, the movable part 43 moves together with the friction rod 42.

[0064] Of course, the positions of the magnetic conductor 45 and the magnet 46 can be interchanged to achieve the same technical effect.

[0065] In one embodiment, reference is made to Figure 8 The movable part 43 is provided with an adsorption mounting groove 431, and the magnetic conductive part 45 or magnet 46 is installed in the adsorption mounting groove 431.

[0066] Reference Figure 7 and Figure 8 The magnetic conductive component 45 is installed in the adsorption mounting groove 431.

[0067] Alternatively, magnet 46 can be installed in adsorption mounting groove 431.

[0068] In one embodiment, reference is made to Figure 7 and Figure 8 The side of the movable part 43 that abuts against the friction rod 42 has an abutting surface 43a that fits against the outer surface of the friction rod 42.

[0069] The friction rod 42 is usually cylindrical, so the contact surface 43a that abuts against the outer surface of the friction rod 42 is an arc-shaped surface, so that the moving part 43 fits better against the outer surface of the friction rod 42.

[0070] Of course, the contact surface 43a can also be other surfaces that mate with the outer surface of the friction rod 42, such as a plane.

[0071] In one embodiment, reference is made to Figure 7 and Figure 8 The magnet 46 abuts against the bottom of the friction rod 42. At this time, the movable part 43 is located above the friction rod 42, and the magnetic guide 45 is set inside the movable part 43. The magnetic guide 45 adopts an inverted U-shaped structure.

[0072] In one embodiment, reference is made to Figure 6 The base 10 is provided with a mounting groove 11, and the piezoelectric mechanism is installed in the mounting groove 11.

[0073] Optionally, refer to Figure 6 The mounting slot 11 is provided with a magnet mounting slot 111, and a magnet 46 is installed in the magnet mounting slot 111. At this time, the magnetic conductor 45 is set in the movable part 43.

[0074] The piezoelectric mechanism also includes an adsorption iron sheet 47, which is disposed in the base 10. The adsorption iron sheet 47 is connected to the magnet mounting groove 111 and is attracted to the magnet 46.

[0075] In this embodiment, the adsorption iron sheet 47 and the magnet 46 are magnetically attracted to each other, making the installation structure of the magnet 46 more stable. At the same time, the adsorption iron sheet 47 can enhance the structural strength of the base 10.

[0076] In one embodiment, the adsorbent sheet 47 is embedded in the base 10.

[0077] In one embodiment, reference is made to Figure 5 The bottom of the base 10 is provided with an annular groove 16, and the annular adsorption iron sheet 47 is embedded in the annular groove 16. The annular groove 16 is connected to the magnet mounting groove 111.

[0078] Specifically, refer to Figure 6 The annular groove 16 and the magnet mounting groove 111 are connected by a connecting port 112.

[0079] In one embodiment, reference is made to Figure 7 and Figure 8 The piezoelectric mechanism also includes a counterweight 48, which is fixedly connected to the piezoelectric block 41 and located on the side away from the friction rod 42. The counterweight 48 is mounted on the base 10, and the piezoelectric block 41 is mounted on the base 10 through the counterweight 48.

[0080] The counterweight 48, piezoelectric block 41 and friction rod 42 are stacked sequentially along the linear motion direction of the friction rod 42.

[0081] When the base 10 is provided with a mounting groove 11, the counterweight 48 is fixed in the mounting groove 11.

[0082] In one embodiment, the axial direction of the movable pin 44 is parallel to the axis, meaning the axial direction of the movable pin 45 is vertical. The linear motion direction of the friction rod 42 is parallel to the tangential direction of the movable seat 20 during rotation, and the length direction of the mounting hole 21 is consistent with the linear motion direction of the friction rod 42.

[0083] In one embodiment, the piezoelectric block 41 is powered by an external circuit or by a built-in circuit within the base 10.

[0084] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 9 A fixing hole 31 is provided on the radial outer side of the blade 30.

[0085] Reference Figures 1 to 4 , Figure 6 The base 10 is provided with a support protrusion 12, and the movable seat 20 is arranged around the outside of the support protrusion 12. The top of the support protrusion 12 is provided with a fixing pin 13, which is rotatably connected to the fixing hole 31, so that the radial outer side of the blade 30 is rotatably connected to the support protrusion 12 of the base 10 around the axial direction (that is, the up and down direction) of the fixing pin 13.

[0086] The number of fixing pins 13 is not less than the number of blades 30, so that one blade 30 can be rotatably connected to a corresponding fixing pin 13. For example, when there are six blades 30, the number of fixing pins 13 is also six.

[0087] Several fixed pins 13 are preferably evenly arranged circumferentially at the top of the support protrusion 12.

[0088] The fixing hole 31 is a circular hole that rotatably connects with the fixing pin 13.

[0089] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 9 The blade 30 is provided with a movable hole 32. (See reference...) Figures 1 to 4 The movable base 20 is provided with a movable pin 22 at the top. The movable pin 22 is connected to the movable hole 32 on the blade 30. When the movable base 20 rotates, the movable pin 22 drives the blade 30 to rotate around a direction parallel to the axis, thereby changing the diameter of the aperture adjustment hole 30a.

[0090] The number of movable pins 22 is not less than the number of blades 30, so that one blade 30 can be connected to a corresponding movable pin 22. For example, when there are six blades 30, the number of movable pins 22 is also six.

[0091] A number of movable pins 22 are preferably evenly arranged circumferentially at the top of the movable seat 20.

[0092] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 9 The adjacent blades are staggered and overlapped.

[0093] For example, when there are six blades 30, three blades 30 spaced apart are located below three other blades 30 spaced apart, and there is partial overlap between adjacent blades 30.

[0094] In one embodiment, reference is made to Figure 9 The radially inner end of the blade 30 is a wedge-shaped portion 33. At least one of the two sidewalls of the wedge portion 33 is an arc-shaped surface 33a and is close to the lens clearance hole 50, so that a number of blades 30 form a near-circular aperture adjustment hole 30a.

[0095] In one embodiment, the movable hole 32 is an arc-shaped hole.

[0096] The curvature of the arc-shaped hole should preferably match the curvature of the arc-shaped surface.

[0097] The movable hole 32 is more preferably an arc-shaped hole extending along the involute direction of the lens clearance hole 50.

[0098] In one embodiment, the base 10, the support protrusion 12, and the movable seat 20 are all annular structures.

[0099] Therefore, the movable seat 20 is fitted around the outside of the support protrusion 12 and located on the base 10, and the movable seat 20 can rotate on the base 10 around the outside of the support protrusion 12.

[0100] Of course, the base 10, the support protrusion 12 and the movable seat 20 can also be other structures, such as a polygonal outer contour. However, the base 10, the support protrusion 12 and the movable seat 20 are all provided with corresponding holes in the middle to form the lens clearance hole 50.

[0101] In one embodiment, the base 10 and the support protrusion 12 are integrally formed.

[0102] In one embodiment, reference is made to Figures 1 to 2 An aperture disk 60 is mounted on a fixed pin 13 at the top of the support protrusion 12. The aperture disk 60 is located between the support protrusion 12 and several blades 30. The central hole of the aperture disk 60 is the aperture limiting hole.

[0103] The central hole of the aperture disk 60 is the aperture with the largest range, and the aperture disk 60 limits the maximum range of the aperture; at the same time, the aperture disk 60 has a certain wear resistance to prevent the movement of the blades 30 from rubbing against the base 10.

[0104] In one embodiment, reference is made to Figures 1 to 4 , Figure 6 The base 10 has several fixed protrusions 14 arranged circumferentially along its edge. The fixed protrusions 14 are located on the outside of the movable seat 20, and a fixed post 15 is provided at the top of the fixed protrusions 14.

[0105] The lens aperture adjustment device also includes a top cover 70, which is fixedly connected to the fixing post 15, and a movable space is formed between the top cover 70 and the base 10. The top cover 70, the movable seat 20, and the base 10 are provided with lens clearance holes 50 along the axis to cooperate with the lens. That is to say, the top cover 70 also has a top cover hole in the middle, and the diameter of the top cover hole is not smaller than the diameter of the lens clearance hole 50.

[0106] The movable seat 20, several blades 30 and the drive mechanism 40 are all arranged in the movable space, and the movable seat 20 and several blades 30 can rotate in the movable space.

[0107] One or more fixing posts 15 at the top of the fixing protrusion 14 can be set as needed.

[0108] In one embodiment, reference is made to Figure 4 and Figure 6 The inner side of some or all of the fixed protrusions 14 is provided with grooves, and some or all of the grooves are provided with balls 80. When the movable seat 20 is installed on the base 10, one side of the inner wall of the movable seat 20 contacts the balls 80 and rotates under the action of the drive mechanism 40.

[0109] The design of ball bearing 80 can reduce the friction when the movable seat 20 rotates.

[0110] In one embodiment, reference is made to Figure 4and Figure 6 The ball bearing 80 is disposed in a groove on one side of the base 10, and the drive mechanism 40 is located on the base 10 between two adjacent fixed protrusions 14 with the ball bearing 80.

[0111] In this embodiment, a groove and ball bearing 80 are provided on one side of the base, while the other side has no ball bearing 80, or no groove and ball bearing 80 are provided. This allows the movable seat 20 to be positioned close to the ball bearing 80 under the limiting action of the movable pin 45, realizing the rotational action after the movable seat 20 abuts against the ball bearing 80. This design can reduce the number of ball bearings 80 and reduce the overall production cost.

[0112] For example, Figure 6 As shown, four fixed protrusions 14 are arranged circumferentially along the edge of the base 10. Each fixed protrusion 14 has a groove on its inner side. A ball bearing 80 is installed in two adjacent grooves, while no ball bearing 80 is installed in the other two grooves. The mounting groove 11 of the drive mechanism 40 is located between the two grooves where the ball bearing 80 is installed.

[0113] Of course, in actual design, each fixed protrusion 14 can also have a groove on its inner side, and each groove can have a ball bearing 80. The drive mechanism 40 is located on the base 10 between any two adjacent fixed protrusions 14. This makes the installation of the movable seat 20 more stable and has better structural stability.

[0114] 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 adjustment device, characterized in that, The lens aperture adjustment device includes: Base; 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. A plurality of blades are arranged circumferentially around the lens clearance hole and located above the base and the movable seat. The radially outer sides of the plurality of blades are rotatably connected to the base in a direction parallel to the axis. The plurality of blades are arranged in a ring shape and the radially inner sides form an aperture adjustment hole with an adjustable diameter. When the movable seat rotates around the axis, causing the plurality of blades to rotate, the diameter of the aperture adjustment hole gradually increases or decreases. The driving mechanism employs a piezoelectric mechanism, which includes a piezoelectric block, a friction rod, a movable component, and a movable pin. The friction rod is fixedly connected to the piezoelectric block, and the movable component abuts against the friction rod. The movable component is connected to the movable pin, which extends into the mounting hole. When the friction rod moves with the piezoelectric block, it performs a linear motion, which in turn drives the movable component to perform a linear motion, thereby causing the movable pin to push the movable seat to rotate within the mounting hole.

2. The lens aperture adjustment device as described in claim 1, characterized in that, The piezoelectric mechanism further includes an adsorption component, the movable part abuts against the friction rod through the adsorption component, the adsorption component includes a magnetic conductive element and a magnet disposed opposite to each other on two sides of the friction rod, one of the magnetic conductive element and the magnet is disposed on the movable part, and the other of the magnetic conductive element and the magnet abuts against the friction rod; And / or, the side of the movable member that abuts against the friction rod has an abutting surface that mates with the outer surface of the friction rod; And / or, the base is provided with a mounting groove, and the piezoelectric mechanism is installed in the mounting groove; And / or, the piezoelectric mechanism further includes an adsorption iron sheet disposed within the base; And / or, the piezoelectric mechanism further includes a counterweight, which is fixedly connected to the piezoelectric block and located on the side away from the friction rod, and the counterweight is mounted on the base; And / or, the axial direction of the movable pin is parallel to the axis, the linear motion direction of the friction rod is parallel to the tangential direction when the movable seat rotates, and the length direction of the mounting hole is consistent with the linear motion direction of the friction rod; And / or, the piezoelectric block is powered by an external circuit or by the built-in wiring within the base.

3. The lens aperture adjustment device as described in claim 2, characterized in that, The movable part is provided with an adsorption mounting groove, and the magnetic conductive part or the magnet is installed in the adsorption mounting groove. And / or, the magnet abuts against the friction rod, the magnetic conductive element is disposed within the movable element, and the magnetic conductive element adopts an inverted U-shaped structure; And / or, the mounting groove is provided with a magnet mounting groove, the magnet is installed in the magnet mounting groove, and the adsorption iron sheet is connected to the magnet mounting groove and is attracted to the magnet. And / or, the adsorption iron sheet is pre-embedded in the base; or the bottom end of the base is provided with an annular groove, the adsorption iron sheet is an annular structure, the adsorption iron sheet is embedded in the annular groove, the annular groove is connected to the magnet mounting groove provided in the mounting groove, the magnet is installed in the magnet mounting groove, and the magnet and the adsorption iron sheet are attracted to each other.

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

5. The lens aperture adjustment device as described in 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 fixing pin at the top of the support protrusion, the aperture disk is located between the support protrusion and several blades, and the central hole of the aperture disk is an aperture defining hole.

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

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

8. The lens aperture adjustment device as described in any one of claims 1 to 6, characterized in that, The base edge is provided with a plurality of fixed protrusions along the circumferential direction. The fixed protrusions are located on the outside of the movable seat, and a fixed post is provided at the top of the fixed protrusion. The lens aperture adjustment device also includes a top cover, which is fixedly connected to the fixed post. An movable space is formed between the top cover and the base. The top cover, the movable base, and the base are provided with lens clearance holes that cooperate with the lens along the axis. The movable seat, the plurality of blades, and the drive mechanism are all disposed within the movable space, and the movable seat and the plurality of blades can rotate within the movable space.

9. The lens aperture adjustment device as described in any one of claims 1 to 6, characterized in that, The base edge is provided with a number of fixed protrusions along the circumferential direction. The fixed protrusions are located on the outside of the movable seat. Some or all of the fixed protrusions are provided with grooves on their inner sides. Some or all of the grooves are provided with balls. When the movable seat is installed on the base, one inner wall of the movable seat contacts the balls and rotates under the action of the drive mechanism.

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

Images