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 friction rod, a movable part and a movable pin shaft. The friction rod is fixedly connected to the piezoelectric block, and the movable part abuts against the friction rod. The movable part is connected to the movable pin shaft, and the movable pin shaft extends into the mounting hole. When the friction rod moves with the piezoelectric block, the friction rod moves linearly, driving the movable part to move linearly, and then driving the movable pin shaft to push the movable seat to rotate in the mounting hole.

[0010] Optionally, the piezoelectric mechanism also includes an adsorption component, and the movable part abuts against the friction rod through the adsorption component. The adsorption component includes a magnetic conductive part and a magnet relatively arranged on two opposite sides of the friction rod, and one of the magnetic conductive part and the magnet is arranged on the movable part, and the other of the magnetic conductive part and the magnet abuts against the friction rod.

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

[0012] Optionally, a side surface of the movable part abutting against the friction rod has an abutting surface that cooperates with and abuts against an outer surface of the friction rod.

[0013] Optionally, the magnet abuts against the friction rod, the magnetic conductive part is arranged in the movable part, and the magnetic conductive part adopts an inverted U-shaped structure.

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

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

[0016] The piezoelectric mechanism further comprises an adsorption iron sheet, which is arranged in the base, connected to the magnet installation groove and adsorbed to the magnet.

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

[0018] Optionally, an annular groove is provided at the bottom end of the base, the adsorption iron sheet is 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 comprises a counterweight block, the counterweight block is fixedly connected to the piezoelectric block and is located on a side away from the friction rod, the counterweight block is mounted on the base, and the piezoelectric block is arranged on the base through 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 of the movable seat when rotating, 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 a built-in circuit in the base.

[0022] 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.

[0023] 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.

[0024] Optionally, two adjacent blades are arranged in a staggered and overlapping manner.

[0025] 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.

[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 avoidance 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 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.

[0031] 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;

[0032] 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;

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Beneficial effects: The present invention has at least one or more of the following advantages:

[0038] 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.

[0039] 2. The driving mechanism of the present invention adopts a piezoelectric mechanism. After the piezoelectric block is energized, it will stretch and make the friction rod move linearly, which drives the movable part to move linearly, and then pushes the movable seat to rotate in the mounting hole at the bottom of the movable seat by moving the pin shaft, thereby realizing the rotation of the movable seat. Compared with the traditional driving device with a magnet and coil matching structure, the piezoelectric mechanism used in the present invention generates a magnetic field when the magnet and coil match, and 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.

[0040] 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.

[0041] 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

[0042] Figure 1 A structural schematic diagram of the present invention;

[0043] Figure 2 for Figure 1 Exploded diagram of

[0044] Figure 3 A diagram showing the positional relationship between the base and the movable seat of the present invention;

[0045] Figure 4 for Figure 3 Exploded diagram of

[0046] Figure 5 for Figure 4 Schematic diagram from another angle;

[0047] Figure 6 An exploded diagram of the positional relationship between the base and the driving mechanism of the present invention;

[0048] Figure 7 A structural schematic diagram of the driving mechanism of the present invention;

[0049] Figure 8 for Figure 7 Exploded diagram of

[0050] Fig. 9 An exploded view of the positional relationship of a plurality of blades arranged in a ring shape according to the present invention. DETAILED DESCRIPTION

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Reference Figures 1 to 9The 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.

[0056] The base 10 is used to be fixed on the housing of the lens motor.

[0057] 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 3 The center line A in the up-down direction.

[0058] 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.

[0059] Reference Figure 7 and Figure 8 The driving 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, and the movable pin 44 extends into the mounting hole 21. When the friction rod 42 moves with the piezoelectric block 41, the friction rod 42 moves linearly, driving the movable part 43 to move linearly, and then driving the movable pin 44 to push the movable seat 20 to rotate in the mounting hole 21.

[0060] The driving mechanism 40 of the present invention adopts a piezoelectric mechanism. After the piezoelectric block 41 is energized, it will stretch, and the friction rod 42 will move linearly, which drives the movable member 43 to move linearly, and then pushes the movable seat 20 to rotate in the mounting hole 21 at the bottom of the movable seat 20 through the movable pin 45, thereby realizing the rotation of the movable seat 20. Compared with the traditional driving device with a magnet and coil matching structure, the piezoelectric mechanism used in the present invention generates a magnetic field when the magnet and coil match, and 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.

[0061] In one embodiment, the piezoelectric mechanism also includes an adsorption component, and the movable part 43 abuts against the friction rod 42 through the adsorption component. The adsorption component includes a magnetic conductive part 45 and a magnet 46 relatively arranged on two opposite sides of the friction rod 42, one of the magnetic conductive part 45 and the magnet 46 is arranged on the movable part 43, and the other of the magnetic conductive part 45 and the magnet 46 abuts against the friction rod 42.

[0062] Reference Figure 7 and Figure 8 The magnetic conductive member 45 and the magnet 46 are relatively arranged on the upper and lower sides of the friction rod 42, the movable member 43 is located above the friction rod 42 and abuts against the friction rod 42, the magnetic conductive member 45 is arranged in the movable member 43, and the magnet 46 abuts against the bottom end of the friction rod 42.

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

[0064] Of course, the positions of the magnetic conductive member 45 and the magnet 46 can be interchanged with each other and still have the same technical effect.

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

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

[0067] Of course, the magnet 46 may also be installed in the adsorption installation groove 431 .

[0068] In one embodiment, referring to Figure 7 and Figure 8The side surface of the movable member 43 that abuts against the friction rod 42 has a contact surface 43 a that cooperates with and abuts against the outer surface of the friction rod 42 .

[0069] The friction rod 42 is usually cylindrical, so the abutting surface 43 a that abuts against the outer surface of the friction rod 42 is an arc-shaped surface, so that the movable member 43 can better fit the outer surface of the friction rod 42 .

[0070] Of course, the abutting surface 43 a may also be other surfaces that abut against the outer surface of the friction rod 42 , such as a plane.

[0071] In one embodiment, referring to Figure 7 and Figure 8 The magnet 46 abuts against the bottom end of the friction rod 42. At this time, the movable member 43 is located above the friction rod 42. The magnetic conductive member 45 is arranged in the movable member 43. The magnetic conductive member 45 adopts an inverted U-shaped structure.

[0072] In one embodiment, referring to Figure 6 A mounting groove 11 is provided on the base 10 , and the piezoelectric mechanism is installed in the mounting groove 11 .

[0073] Optionally, refer to Figure 6 A magnet mounting groove 111 is provided in the mounting groove 11 , and a magnet 46 is installed in the magnet mounting groove 111 . At this time, the magnetic conductive member 45 is provided in the movable member 43 .

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

[0075] In this embodiment, the adsorption iron sheet 47 and the magnet 46 are magnetically attracted to each other, so that the installation structure of the magnet 46 is 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 adsorption iron sheet 47 is pre-buried in the base 10 .

[0077] In one embodiment, referring to Figure 5 An annular groove 16 is provided at the bottom end of the base 10 , and an annular adsorption iron sheet 47 is embedded in the annular groove 16 , and the annular groove 16 is connected to the magnet installation groove 111 .

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

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

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

[0081] When a mounting groove 11 is provided on the base 10 , 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, that is, the axial direction of the movable pin 45 is in the up-down direction. The linear motion direction of the friction rod 42 is parallel to the tangential direction of the movable seat 20 when rotating, 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 in the base 10 .

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

[0085] 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.

[0086] 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.

[0087] A plurality of fixing pins 13 are preferably uniformly arranged on the top of the supporting protrusion 12 along the circumferential direction.

[0088] The fixing hole 31 is a circular hole that is rotatably connected to the fixing pin shaft 13 .

[0089] In one embodiment, referring to Figure 1 , Figure 2 and Fig. 9 , a movable hole 32 is provided on the blade 30. Figures 1 to 4A 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.

[0090] 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.

[0091] A plurality of movable pins 22 are preferably evenly arranged on the top of the movable seat 20 along the circumferential direction.

[0092] In one embodiment, referring to Figure 1 , Figure 2 and Fig. 9 , two adjacent blades 30 are arranged in a staggered and overlapping manner.

[0093] 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.

[0094] In one embodiment, referring to Fig. 9 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.

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

[0096] The curvature of the arc-shaped hole is preferably consistent with 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 avoidance hole 50 .

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

[0099] 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 .

[0100] 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 .

[0101] In one embodiment, the base 10 and the supporting protrusion 12 are made in one piece.

[0102] 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.

[0103] 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.

[0104] 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 .

[0105] 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.

[0106] 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.

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

[0108] 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 .

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

[0110] In one embodiment, referring to Figure 4 and 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 .

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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 appended claims of 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 friction rod, a movable part and a movable pin shaft. The friction rod is fixedly connected to the piezoelectric block, and the movable part abuts against the friction rod. The movable part is connected to the movable pin shaft, and the movable pin shaft extends into the mounting hole. When the friction rod moves with the piezoelectric block, the friction rod moves linearly, driving the movable part to move linearly, and then driving the movable 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 piezoelectric mechanism further includes an adsorption component, through which the movable part abuts against the friction rod, and the adsorption component includes a magnetic conductive part and a magnet relatively arranged on two opposite sides of the friction rod, one of the magnetic conductive part and the magnet is arranged on the movable part, and the other of the magnetic conductive part and the magnet abuts against the friction rod; And / or, the side surface of the movable part abutting against the friction rod has an abutting surface that cooperates with the outer surface of the friction rod; And / or, a mounting groove is provided on the base, and the piezoelectric mechanism is installed in the mounting groove; And / or, the piezoelectric mechanism further comprises an adsorption iron sheet, and the adsorption iron sheet is arranged in the base; And / or, the piezoelectric mechanism further comprises a counterweight block, the counterweight block is fixedly connected to the piezoelectric block and is located at a side away from the friction rod, and the counterweight block 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 of the movable seat when rotating, 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 a built-in circuit in the base.

3. The lens aperture adjustment device according to claim 2, characterized in that: The movable part is provided with an adsorption installation groove, and the magnetic conductive part or the magnet is installed in the adsorption installation groove; And / or, the magnet abuts against the friction rod, the magnetic conductive member is arranged in the movable member, and the magnetic conductive member adopts an inverted U-shaped structure; And / or, a magnet installation groove is provided in the installation groove, the magnet is installed in the magnet installation groove, and the adsorption iron sheet is connected to the magnet installation groove and adsorbed to the magnet; And / or, the adsorption iron sheet is pre-buried in the base; or an annular groove is provided at the bottom end of the base, 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 adsorbed on each other.

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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