An intelligent optical device and its variable aperture mechanism

Abstract

The present invention discloses a variable aperture mechanism, which includes an aperture disk having a light passing hole, and further includes a blade assembly rotatably disposed on the surface of the aperture disk and used for changing the light passing area of the light passing hole by the gathering or unfolding of a plurality of blades during rotation, a transmission assembly linearly movably disposed on the aperture disk and used for driving the blade assembly to rotate during movement, and an electromagnet assembly disposed on the aperture disk. The electromagnet assembly includes a movable magnetic member movably disposed on the aperture disk and fixedly connected to the transmission assembly, and a fixed magnetic member fixedly disposed on the aperture disk and used for driving the movable magnetic member to move by magnetic force. Thus, the magnetic force generated by the electromagnet assembly on the transmission assembly when powered on is used as the driving force for the rotation of the blade assembly, the energy consumption is greatly reduced, and at the same time, the structural composition of the variable aperture mechanism is simple and the space occupation is small. The present invention also discloses an intelligent optical device, and its beneficial effects are as described above.

Description

Technical Field

[0001] The present invention relates to the field of optical technologies, and particularly to a variable aperture mechanism. The present invention also relates to an intelligent optical device. Background Art

[0002] An intelligent optical device is an intelligent integrated electronic device that encompasses optical technologies, microelectronics technologies, control technologies, and information technologies.

[0003] Taking an intelligent projector as an example, an intelligent projector is an important intelligent optical device. Currently, the intelligent projector market is in the process of gradual expansion, and the functions and styles of intelligent projectors demanded by the market are diverse. Therefore, intelligent projector manufacturers need to keep up with market demands in a timely manner, improve product functions, and increase the adaptability of products to multiple scenarios.

[0004] Most traditional intelligent projectors still have great room for improvement in the quality of projection images related to optical parameters such as brightness and contrast. One of the important optical parameters affecting the quality of projection images is the aperture area. Among them, the aperture is an important component of an intelligent projector, usually circular, and is mainly used for light to pass through the lens barrel. The area of the aperture directly affects the light input amount (or light transmission amount) of the camera module. By adjusting the area of the aperture, the light input amount of the camera module can be adjusted, so that the formed image has different brightness and depth of field. Generally, when the area of the aperture is large, the camera module has a larger light input amount, making the formed image have high brightness and good background blurring effect; when the area of the aperture is small, the camera module has a smaller light input amount, making the details of the formed image clearer.

[0005] To meet the need for changes in the aperture area, a variable aperture mechanism has emerged in intelligent projectors. This variable aperture mechanism can dynamically change the aperture area and thus change the light transmission amount of the lens, achieving the purpose of changing image quality parameters such as brightness and contrast. In the prior art, the variable aperture mechanism generally adjusts the available light transmission area of the aperture by driving a motor to pull multiple blades to expand or gather within the aperture. However, although this adjustment method can accurately adjust the aperture area, on the one hand, when there are more blades, the number of driving motors used is more, resulting in higher energy consumption and greater heat generation, which is not conducive to the heat dissipation of the lens barrel and increases the production cost; on the other hand, the driving motor and its output shaft occupy a large amount of space inside the lens barrel, resulting in an increase in the designed volume of the lens barrel, which is not conducive to the layout of the aperture mechanism.

[0006] Therefore, how to reduce the energy consumption during the adjustment process and at the same time reduce the space occupation on the basis of realizing the adjustment of the aperture area is a technical problem faced by those skilled in the art. Summary of the Invention

[0007] The object of the present invention is to provide a variable aperture mechanism that can reduce energy consumption during the adjustment process while reducing space occupation while achieving aperture area adjustment. Another object of the present invention is to provide an intelligent optical device.

[0008] In order to solve the above technical problems, the present invention provides a variable aperture mechanism, including an aperture disk with a light-through hole, and also including a blade assembly rotatably arranged on the surface of the aperture disk, used to change the light-through area of the light-through hole by gathering or expanding a plurality of blades during rotation, and a transmission assembly linearly movably arranged on the aperture disk, used to drive the blade assembly to rotate during movement, and an electromagnet assembly arranged on the aperture disk, the electromagnet assembly including a movable magnetic part movably arranged on the aperture disk and fixedly connected to the transmission assembly, and a fixed magnetic part fixedly arranged on the aperture disk, used to drive the movable magnetic part to move by magnetic force.

[0009] Preferably, the movable magnetic part is a permanent magnet, the fixed magnetic part is an electromagnetic coil, the magnetic poles of the permanent magnet are opposite to the axis of the electromagnetic coil, and the direction of the magnetic force formed by the electromagnetic coil on the permanent magnet when energized is colinear with its moving direction.

[0010] Preferably, the movable magnetic part is an electromagnetic coil, the fixed magnetic part is a permanent magnet, the magnetic pole of the permanent magnet is opposite to the axis of the electromagnetic coil, and the magnetic force direction formed by the permanent magnet on the electromagnetic coil after power is applied is colinear with its moving direction.

[0011] Preferably, the electromagnetic coils are distributed at both ends of the magnetic poles of the permanent magnet, and the directions of the magnetic forces generated by the electromagnetic coils on the permanent magnet remain consistent when energized.

[0012] Preferably, each of the electromagnetic coils is distributed on both sides of the moving path of the permanent magnet, and an iron core is arranged in each of the electromagnetic coils, and the ends of each of the iron cores extend to both ends of the magnetic poles of the permanent magnet.

[0013] Preferably, the blade assembly includes two primary blades which are symmetrically distributed on both sides of the aperture disk surface and can rotate synchronously in opposite directions, and the inner edges of the two primary blades are combined in the light-through hole to form a primary aperture hole with an area smaller than the light-through hole when they are rotated to a gathered position, and the inner edges of the two primary blades are located outside the light-through hole when they are rotated to an extended position.

[0014] Preferably, the blade assembly further includes two secondary blades symmetrically distributed on both sides of the surface of the aperture disk and capable of synchronously rotating in opposite directions. When the inner edges of the two secondary blades rotate to the converging position, they close within the light passing hole to form a secondary aperture hole with an area smaller than the primary aperture hole. When the inner edges of the two secondary blades rotate to the unfolded position, they are located outside the light passing hole.

[0015] Preferably, a rotating shaft connected to the aperture disk is vertically provided on the surface of each primary blade and each secondary blade, and an arc-shaped sliding groove corresponding to each and cooperating with the transmission assembly is provided on the surface of each primary blade and each secondary blade.

[0016] Preferably, the transmission assembly is a sliding column, and a guiding sliding groove for guiding the movement of each sliding column is provided on the surface of the aperture disk.

[0017] Preferably, when the sliding column slides to both ends of the guiding sliding groove, each primary blade and each secondary blade rotate to the converging position or the unfolded position respectively.

[0018] Preferably, the primary blades are hierarchically distributed vertically and are in close contact with each other, and the secondary blades are hierarchically distributed vertically and are in close contact with each other; the distribution positions of the primary blades and the secondary blades are staggered vertically.

[0019] The present invention also provides an intelligent optical device, including a lens barrel and a variable aperture mechanism disposed in the lens barrel, wherein the variable aperture mechanism is specifically the variable aperture mechanism described in any one of the above.

[0020] The variable aperture mechanism provided by the present invention mainly includes an aperture disk, a blade assembly, a transmission assembly, and an electromagnet assembly. Among them, the aperture disk is the main structure of the variable aperture mechanism, generally in the shape of a flat disk, usually having a light passing hole opened at its center (center of the circle). The diameter of the light passing hole is fixed and is the maximum light passing diameter of the aperture. The blade assembly is arranged on the surface of the aperture disk, generally including multiple blades, and can reciprocally rotate on the surface of the aperture disk along a preset trajectory. During the forward rotation, the blades can be gathered together to cover a part of the area of the light passing hole, or during the reverse rotation, the blades can be unfolded to restore the initial area of the light passing hole, thereby changing the available light passing area of the light passing hole, and the available light passing area of the light passing hole is the actual aperture size. The transmission assembly is arranged on the aperture disk and can linearly reciprocate on the surface of the aperture disk, mainly used to drive each blade in the blade assembly to rotate forward or reversely during the movement, so as to gather or reverse unfold and reset each blade according to the preset trajectory. The electromagnet assembly is arranged on the aperture disk, including a movable magnetic part and a fixed magnetic part, and the movable magnetic part is also fixedly connected to the transmission assembly. When the electromagnet assembly is powered on, a magnetic force (magnetic attraction or magnetic repulsion) is generated between the movable magnetic part and the fixed magnetic part through the change of the magnetic field, and this magnetic force is used as the driving force to drive the movable magnetic part to drive the transmission assembly to linearly reciprocate along a predetermined trajectory, and then drive the blade assembly to rotate, realizing the adjustment of the available light passing area of the light passing hole.

[0021] In this way, using the magnetic force generated by the electromagnet assembly on the transmission assembly when powered on as the driving force for the rotation of the blade assembly, driving the blade assembly to rotate to realize the adjustment of the aperture area. Compared with the prior art, the energy consumption of the electromagnet assembly is significantly reduced compared to the driving motor, and there are no rotating components such as rotors, with lower heat generation and no noise interference; at the same time, the structural composition of the variable aperture mechanism is simple, occupies less space, has better reliability in the driving mode, and higher mechanical efficiency. In summary, the variable aperture mechanism provided by the present invention can reduce the energy consumption during the adjustment process and at the same time reduce the space occupation on the basis of realizing the adjustment of the aperture area. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment provided by the present invention.

[0024] Figure 2 is Figure 1 the exploded view of the structure of

[0025] Figure 3 is Figure 2 the enlarged view of the partial structure of

[0026] Figure 4 is the schematic assembly structure diagram of the electromagnet assembly and the transmission assembly.

[0027] Figure 5 is Figure 4 the sectional view taken along the A-A section shown in

[0028] Figure 6 is the schematic diagram of the blade assembly state when the aperture area is at the maximum value.

[0029] Figure 7 is the schematic diagram of the blade assembly state when the aperture area is at the intermediate value.

[0030] Figure 8 is the schematic diagram of the blade assembly state when the aperture area is at the minimum value.

[0031] Among them, Figure 1 — Figure 8 in

[0032] Aperture disc - 1, Blade assembly - 2, Transmission assembly - 3, Electromagnet assembly - 4, Guide chute - 5, Light shield - 6, Cage - 7;

[0033] Light passing hole - 11, Primary blade - 21, Secondary blade - 22, Rotating shaft - 23, Arc chute - 24, Permanent magnet - 41, Electromagnetic coil - 42, Iron core - 43;

[0034] Primary aperture hole - 21a, Secondary aperture hole - 22a. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figure 1 、 Figure 2 , Figure 1 is the schematic diagram of the overall structure of a specific embodiment provided by the present invention, Figure 2 is Figure 1 the exploded view of the structure of

[0037] In a specific embodiment provided by the present invention, the variable aperture mechanism mainly includes an aperture disk 1, a blade assembly 2, a transmission assembly 3, and an electromagnet assembly 4.

[0038] Among them, the aperture disk 1 is the main structure of the variable aperture mechanism, generally in the shape of a flat disk. Usually, a light passing hole 11 is provided at its center (the center of the circle). The diameter of the light passing hole 11 is fixed and is the maximum light passing diameter of the aperture. Generally, the aperture disk 1 has a preset height (or thickness). Its surface can be used to accommodate the remaining components. And in order to avoid light leakage, usually a light shielding plate 6 is also covered above the surface of the aperture disk 1. The shape of the light shielding plate 6 is the same as that of the aperture disk 1, and a light passing hole 11 is also provided at the center.

[0039] The blade assembly 2 is arranged on the surface of the aperture disk 1. Generally, it includes multiple blades and can reciprocally rotate on the surface of the aperture disk 1 along a preset trajectory. During the forward rotation process, the blades can be gathered together to cover a part of the area of the light passing hole 11, or during the reverse rotation process, the blades can be unfolded to restore the initial area of the light passing hole 11, thereby changing the available light passing area of the light passing hole 11. And the available light passing area of the light passing hole 11 is the actual aperture size.

[0040] The transmission assembly 3 is arranged on the aperture disk 1 and can linearly reciprocally move on the surface of the aperture disk 1. It is mainly used to drive each blade in the blade assembly 2 to rotate forward or reversely during the movement process, so as to gather or reverse unfold and reset each blade according to a preset trajectory.

[0041] The electromagnet assembly 4 is arranged on the aperture disk 1, including a movable magnetic member and a fixed magnetic member. Among them, the movable magnetic member is also fixedly connected to the transmission assembly 3. When the electromagnet assembly 4 is energized, a magnetic force (magnetic attraction or magnetic repulsion) is generated between the movable magnetic member and the fixed magnetic member through the change of the magnetic field, and this magnetic force is used as a driving force to drive the movable magnetic member to drive the transmission assembly 3 to linearly reciprocally move along a predetermined trajectory, and then drive the blade assembly 2 to rotate, realizing the adjustment of the available light passing area of the light passing hole 11.

[0042] In this way, for the variable aperture mechanism provided in this embodiment, the magnetic force generated by the electromagnet assembly 4 on the transmission assembly 3 when energized is mainly used as the driving force for the rotation of the blade assembly 2, driving the blade assembly 2 to rotate to realize the adjustment of the aperture area. Compared with the prior art, the energy consumption of the electromagnet assembly 4 is greatly reduced compared with that of the driving motor, and there are no rotating components such as rotors, with lower heat generation and no noise interference; at the same time, the structural composition of the variable aperture mechanism is simple, occupying less space, the driving mode has better reliability, and the mechanical efficiency is higher.

[0043] In summary, the variable aperture mechanism provided in this embodiment can reduce the energy consumption during the adjustment process while reducing the space occupation on the basis of realizing the adjustment of the aperture area.

[0044] As Figure 3 shown, Figure 3 it is Figure 2 a partial enlarged view of.

[0045] In a preferred embodiment regarding the electromagnet assembly 4, the movable magnetic member is specifically a permanent magnet 41, and the fixed magnetic member is specifically an electromagnetic coil 42. Among them, the permanent magnet 41 is movably arranged on the surface of the aperture disk 1 and is fixedly connected to the transmission assembly 3. Thus, when the permanent magnet 41 moves, it drives the transmission assembly 3 to move synchronously. The magnetic poles of the permanent magnet 41 are opposite to the axis of the electromagnetic coil 42, that is, the permanent magnet 41 is located on one axial side of the electromagnetic coil 42, and the magnetic poles (N pole and S pole) of the permanent magnet 41 are collinear with the axis of the electromagnetic coil 42. When an electric current is passed through the electromagnetic coil 42, since the electromagnetic coil 42 is equivalent to a soft magnet and also has its own magnetic poles, and these magnetic poles are distributed along the axis of the electromagnetic coil 42, a magnetic force of attraction or repulsion is formed between the electromagnetic coil 42 and the permanent magnet 41. The direction of this magnetic force is collinear with the moving direction of the permanent magnet 41. Thus, this magnetic force can be utilized to drive the permanent magnet 41 to perform a linear reciprocating movement on the surface of the aperture disk 1, and further drive the transmission assembly 3 to perform a synchronous linear movement.

[0046] Generally, for the electromagnetic coil 42 to form a magnetic force collinear with the moving direction on the permanent magnet 41, the permanent magnet 41 is specifically a bar magnet and is distributed in the central area on one side along the axial direction of the electromagnetic coil 42. Of course, the specific shape of the permanent magnet 41 is not limited to a bar magnet, and other shapes such as a U-shaped magnet or a circular magnet can also be adopted.

[0047] Due to the characteristics of magnetic force, when there is a magnetic attraction force between the electromagnetic coil 42 and the permanent magnet 41, the electromagnetic coil 42 will continuously attract and pull the permanent magnet 41 until it touches itself. Conversely, the electromagnetic coil 42 will continuously repel and push the permanent magnet 41 until the magnetic force weakens to a negligible level or is blocked by the side wall of the aperture disc 1. Therefore, under the magnetic force of the electromagnetic coil 42, the permanent magnet 41 actually only has two stable positions, namely the extreme position when attracted by the magnetic force and the extreme position when repelled by the magnetic force. The paths between the two extreme positions are all transitional positions. This further causes the drive assembly 3 to also only have two stable positions on the surface of the aperture disc 1, namely the two extreme positions at both ends of the linear motion trajectory. When the drive assembly 3 moves to these two extreme positions, the blade assembly 2 is in the fully deployed and fully gathered states respectively. When the drive assembly 3 reciprocates between the two extreme positions, it will drive the blade assembly 2 to rotate reciprocally, causing the blade assembly 2 to transition between the fully deployed and fully gathered states.

[0048] As Figure 4 , Figure 5 shown, Figure 4 Figure 4 is a schematic assembly structure diagram of the electromagnet assembly 4 and the drive assembly 3, Figure 5 and Figure 4 Figure 5 is a sectional view taken along the A-A section shown in Figure 4.

[0049] Furthermore, to increase the driving force of the electromagnetic coil 42 on the permanent magnet 41, in this embodiment, two electromagnetic coils 42 are provided simultaneously and are respectively distributed at both ends of the magnetic poles of the permanent magnet 41, still keeping the axes directly opposite. In this way, one electromagnetic coil 42 faces the S pole of the permanent magnet 41, and the other electromagnetic coil 42 faces the N pole of the permanent magnet 41. Moreover, the distribution of the induced magnetic fields in the two electromagnetic coils 42 is the same, that is, either the two S poles of the electromagnetic coil 42 face the S pole and N pole of the permanent magnet 41 respectively, or the two N poles of the electromagnetic coil 42 face the S pole and N pole of the permanent magnet 41 respectively. With this setting, the magnetic force formed by one electromagnetic coil 42 on the permanent magnet 41 is a magnetic attraction force, while the magnetic force formed by the other electromagnetic coil 42 on the permanent magnet 41 is a magnetic repulsion force, and the directions of the magnetic attraction force and the magnetic repulsion force are the same, thus jointly driving the permanent magnet 41 to perform linear motion. The driving force is almost doubled compared to a single electromagnetic coil 42, and the driving effect is stronger.

[0050] Furthermore, considering that if the two electromagnetic coils 42 are collinearly distributed with the two ends of the permanent magnet 41 respectively, that is, the three are arranged in a straight line, it may lead to an overly obvious length dimension of the electromagnet assembly 4, which is not conducive to the rational utilization of the installation space inside the lens barrel. The aperture disc 1 must also be increased in diameter. For this reason, in this embodiment, the two electromagnetic coils 42 are respectively distributed on both sides of the moving path of the permanent magnet 41, that is, the connection line of the two electromagnetic coils 42 is perpendicular to the connection line of the magnetic poles of the permanent magnet, so that the length dimension of the electromagnet assembly 4 can be effectively reduced.

[0051] Meanwhile, to ensure that the magnetic poles of the electromagnetic coil 42 are facing the magnetic poles of the permanent magnet 41, an iron core 43 is provided in each electromagnetic coil 42 in this embodiment. Specifically, the iron core 43 is L-shaped, its main body is inserted into the electromagnetic coil 42, and its end extends transversely to the two ends of the magnetic poles of the permanent magnet 41. With such a setting, the end of the iron core 43 can be used as the magnetic pole of the electromagnetic coil 42 to generate a magnetic force with the magnetic pole of the permanent magnet 41, adsorbing the permanent magnet 41 onto one of the iron cores 43. Moreover, due to the adsorption of the permanent magnet 41, even after the electromagnetic coil 42 is powered off, the permanent magnet 41 can stably adsorb onto one of the iron cores 43 by relying on its magnetic properties, keeping the transmission assembly 3 at the current extreme position, and further keeping the blade assembly 2 in the fully deployed or fully gathered state.

[0052] In another preferred embodiment of the electromagnet assembly 4, the moving magnetic member is specifically the electromagnetic coil 42, and the fixed magnetic member is specifically the permanent magnet 41. Specifically, in this embodiment, the electromagnetic coil 42 can move reciprocally in a fixed direction on the surface of the aperture disc 1 and is fixedly connected to the transmission assembly 3. The permanent magnet 41 is arranged on the surface of the aperture disc 1 and remains stationary. Meanwhile, the magnetic poles of the permanent magnet 41 are also opposite to the axis of the electromagnetic coil 42, and the magnetic force direction formed by the permanent magnet 41 on the energized electromagnetic coil 42 is collinear with the moving direction of the electromagnetic coil 42. The technical principle and effect of the electromagnet assembly 4 in this embodiment are the same as those of the electromagnet assembly 4 in the foregoing embodiment, and will not be elaborated here.

[0053] As Figure 6 shown, Figure 6 it is a schematic diagram of the state of the blade assembly 2 when the aperture area is at the maximum value.

[0054] In a preferred embodiment of the blade assembly 2, the blade assembly 2 mainly includes two primary blades 21. Specifically, the two primary blades 21 are integrally arc-shaped and symmetrically distributed in the two side regions of the surface of the aperture disk 1 (the axis of symmetry is a certain diameter of the aperture disk 1), and both can rotate on the surface of the aperture disk 1, and their rotational movements are synchronous and opposite, that is, when one primary blade 21 rotates clockwise on the surface of the aperture disk 1, the other primary blade 21 rotates counterclockwise synchronously on the surface of the aperture disk 1.

[0055] Generally, both of the two primary blades 21 include a large end and a small end. On the surface of the large end, a rotating shaft 23 is erected to form a rotatable connection with the surface of the aperture disk 1 or the bottom surface of the light shielding plate 6. To avoid movement interference, the two primary blades 21 can be vertically overlapped with each other, and one of the rotating shafts 23 extends upward to be connected to the bottom surface of the light shielding plate 6, and the other rotating shaft 23 extends downward to be connected to the surface of the aperture disk 1.

[0056] The shape of the small end is semi-circular. When the two primary blades 21 rotate synchronously and towards each other, they approach each other until at the gathering position, the end positions of the small ends of the two primary blades 21 enclose each other, and the two semi-circles are spliced into a temporary complete circular hole, and this complete circular hole is the primary aperture hole 21a. Obviously, since the ends of the two primary blades 21 enclose each other within the light passing hole 11, the area of the primary aperture hole 21a must be smaller than the area of the light passing hole 11. Thus, by rotating the two primary blades 21, the area of the aperture can be adjusted from the area of the light passing hole 11 to the area of the primary aperture hole 21a, that is, the aperture is reduced. As Figure 7 shown, Figure 7 It is a schematic diagram of the state of the blade assembly 2 when the aperture area is at the intermediate value.

[0057] When the two primary blades 21 rotate synchronously and away from each other, they move away from each other until at the unfolded position, the inner edges of the two primary blades 21 are both outside the light passing hole 11, and at this time, the light passing hole 11 is completely exposed, and the aperture area is restored to the maximum value, that is, the area of the light passing hole 11.

[0058] In another preferred embodiment of the blade assembly 2, in addition to including two primary blades 21, the blade assembly 2 further includes two secondary blades 22. At this time, two sets of electromagnet assemblies 4 are provided simultaneously, and two transmission assemblies 3 are also provided simultaneously. One set of electromagnet assemblies 4 is used to drive the corresponding transmission assembly 3 to drive the two primary blades 21 to rotate synchronously and in opposite directions, and the other set of electromagnet assemblies 4 is used to drive the corresponding transmission assembly 3 to drive the two secondary blades 22 to rotate synchronously and in opposite directions.

[0059] Specifically, similar to the primary blades 21, the two secondary blades 22 are integrally arc-shaped and symmetrically distributed on both sides of the surface of the aperture disk 1 (the axis of symmetry is a certain diameter of the aperture disk 1). To avoid movement interference with the primary blades 21, the two secondary blades 22 and the two primary blades 21 can be respectively arranged in the radial two-end regions of the aperture disk 1, and the vertical distribution positions of the two secondary blades 22 and the two primary blades 21 are staggered from each other. For example, the two secondary blades 22 are relatively lower and the two primary blades 21 are relatively higher. At the same time, both of the two secondary blades 22 can perform rotational movement on the surface of the aperture disk 1, and their rotational movements are synchronous and opposite. That is, when one secondary blade 22 rotates clockwise on the surface of the aperture disk 1, the other secondary blade 22 rotates counterclockwise synchronously on the surface of the aperture disk 1.

[0060] Generally, both of the two secondary blades 22 include a large end and a small end. A rotating shaft 23 is erected on the surface of the large end to form a rotatable connection with the surface of the aperture disk 1 or the bottom surface of the light-shielding plate 6. To avoid movement interference, the two secondary blades 22 can be arranged to overlap each other vertically, and one of the rotating shafts 23 extends upward to connect with the bottom surface of the light-shielding plate 6, and the other rotating shaft 23 extends downward to connect with the surface of the aperture disk 1.

[0061] The shape of the small end is semi-circular. When the two secondary blades 22 rotate synchronously and towards each other, they approach each other. Until at the gathering position, the end positions of the small ends of the two secondary blades 22 are closed to each other, and the two semi-circles are spliced into a temporary complete circular hole, and this complete circular hole is the secondary aperture hole 22a. And the area of the secondary aperture hole 22a is smaller than the area of the primary aperture hole 21a. Thus, by the rotation of the two secondary blades 22, the area of the aperture can be adjusted from the area of the light-transmitting hole 11 to the area of the secondary aperture hole 22a, that is, the aperture is further reduced. As Figure 8 shown, Figure 8 Figure 2 shows the schematic state of the blade assembly 2 when the aperture area is at the minimum value.

[0062] When the two secondary blades 22 rotate synchronously and away from each other, they move away from each other. Until at the unfolded position, the inner edges of the two secondary blades 22 are both outside the light-transmitting hole 11, and at this time the light-transmitting hole 11 is completely exposed, and the aperture area is restored to the maximum value, that is, the area of the light-transmitting hole 11.

[0063] Of course, if you want to reduce the area of the aperture to the area of the secondary aperture 22a, you can first reduce the area of the aperture to the area of the primary aperture 21a by rotating the two primary blades 21, and then reduce the area of the aperture to the area of the secondary aperture 22a by rotating the two secondary blades 22. Or you can keep the two primary blades 21 in the unfolded state and directly reduce the area of the aperture to the area of the secondary aperture 22a by the two secondary blades 22. Since the two secondary blades 22 will completely cover the closing range of the two primary blades 21 after closing, the state of the two primary blades 21 has no effect on the aperture area in this case.

[0064] It should be noted that the specific number of the primary blades 21 and the secondary blades 22 in the blade assembly 2 is not limited to two, and the others such as four or more can also be used.

[0065] In a preferred embodiment of the transmission assembly 3, to facilitate the transmission assembly 3 to drive the primary blades 21 and the secondary blades 22 to rotate directionally smoothly during the reciprocating movement in a fixed direction, in this embodiment, arc-shaped sliding grooves 24 are provided on the surfaces of each primary blade 21 and each secondary blade 22. At the same time, the transmission assembly 3 is specifically in the structural form of a sliding column and slides correspondingly in the arc-shaped sliding grooves 24. The bending shape of the arc-shaped sliding grooves 24 is the same as the movement track of the sliding column on each primary blade 21 and the secondary blade 22. With such a setting, when the sliding column makes a linear reciprocating movement driven by the electromagnet assembly 4, it will drive each primary blade 21 and each secondary blade 22 to rotate directionally through the abutting action with the side wall of the arc-shaped sliding groove 24. Of course, the moving direction of the sliding column and the rotation axis 23 should be kept non-collinear so as to utilize the abutting force to form a circumferential deflection force.

[0066] Furthermore, to ensure the smooth movement of the sliding column, in this embodiment, a guiding sliding groove 5 is provided on the surface of the aperture disk 1, so that the bottom of the sliding column is mounted on the holder 7 installed on the bottom surface of the aperture disk 1 by the electromagnet assembly 4, and at the same time, the top of the sliding column extends into the guiding sliding groove 5 and slides in the guiding sliding groove 5. Generally, when the sliding column slides to one end of the guiding sliding groove 5, each primary blade 21 and each secondary blade 22 rotate to the gathering position respectively, and when the sliding column slides to the other end of the guiding sliding groove 5, each primary blade 21 and each secondary blade 22 rotate to the unfolded position respectively, and the blade assembly 2 as a whole switches between the two working states of gathering and unfolding.

[0067] This embodiment also provides an intelligent optical device, which mainly includes a lens barrel and a variable aperture mechanism arranged in the lens barrel. Among them, the specific content of the variable aperture mechanism is the same as the above-related content, and will not be elaborated here.

[0068] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A variable aperture mechanism, comprising an aperture disk (1) having a light passing hole (11), characterized in that, It further includes a vane assembly (2) rotatably arranged on the surface of the aperture disk (1) and used for changing the light transmission area of the light transmission hole (11) by the gathering or unfolding of a plurality of vanes during rotation, a transmission assembly (3) linearly movably arranged on the aperture disk (1) and used for driving the vane assembly (2) to rotate during movement, and an electromagnet assembly (4) arranged on the aperture disk (1). The electromagnet assembly (4) includes a movable magnetic member movably arranged on the aperture disk (1) and fixedly connected to the transmission assembly (3), and a fixed magnetic member fixedly arranged on the aperture disk (1) and used for driving the movable magnetic member to move by magnetic force; The movable magnetic member is a permanent magnet (41), the fixed magnetic member is an electromagnetic coil (42), the magnetic pole of the permanent magnet (41) is opposite to the axis of the electromagnetic coil (42), and the magnetic force direction formed by the electromagnetic coil (42) on the permanent magnet (41) when energized is collinear with its moving direction; The electromagnetic coils (42) are simultaneously distributed at both ends of the magnetic pole of the permanent magnet (41), and the magnetic force directions formed by the electromagnetic coils (42) on the permanent magnet (41) when energized are kept consistent; The electromagnetic coils (42) are respectively distributed on both sides of the moving path of the permanent magnet (41), and an iron core (43) is arranged in each electromagnetic coil (42). The ends of the iron cores (43) respectively extend to both ends of the magnetic pole of the permanent magnet (41); Using the end of the iron core (43) as the magnetic pole of the electromagnetic coil (42) to generate a magnetic force with the magnetic pole of the permanent magnet (41), adsorbing the permanent magnet (41) to one of the iron cores (43). And due to the adsorption of the permanent magnet (41), even after the electromagnetic coil (42) is powered off, the permanent magnet (41) can stably adsorb on one of the iron cores (43) by the magnet characteristics, so that the transmission assembly (3) remains at the current limit position.

2. The variable aperture mechanism according to claim 1, wherein The movable magnetic member is an electromagnetic coil (42), the fixed magnetic member is a permanent magnet (41), the magnetic pole of the permanent magnet (41) is opposite to the axis of the electromagnetic coil (42), and the magnetic force direction formed by the permanent magnet (41) on the energized electromagnetic coil (42) is collinear with its moving direction.

3. The variable aperture mechanism according to any one of claims 1-2, characterized in that, The vane assembly (2) includes two primary vanes (21) symmetrically distributed on both sides of the surface of the aperture disk (1) and capable of synchronously rotating in opposite directions. When the inner edges of the two primary vanes (21) rotate to the gathering position, they enclose a primary aperture hole (21a) with an area smaller than that of the light transmission hole (11) in the light transmission hole (11). When the inner edges of the two primary vanes (21) rotate to the unfolding position, they are located outside the light transmission hole (11).

4. The variable aperture mechanism according to claim 3, characterized in that, The blade assembly (2) further includes two secondary blades (22) symmetrically distributed on both sides of the surface of the aperture disk (1) and capable of synchronous reverse rotation. When the inner edges of the two secondary blades (22) rotate to the converging position, they enclose a secondary aperture (22a) with an area smaller than the primary aperture (21a) within the light passing aperture (11). When the inner edges of the two secondary blades (22) rotate to the unfolded position, they are located outside the light passing aperture (11).

5. The variable aperture mechanism according to claim 4, wherein On the surface of each primary blade (21) and each secondary blade (22), a rotating shaft (23) connected to the aperture disk (1) is erected, and on the surface of each primary blade (21) and each secondary blade (22), an arc-shaped sliding groove (24) corresponding to each and cooperating with the transmission assembly (3) for sliding is provided.

6. The variable aperture mechanism according to claim 5, characterized in that The transmission assembly (3) is a sliding column, and a guiding sliding groove (5) for guiding the movement of each sliding column is provided on the surface of the aperture disk (1).

7. The variable aperture mechanism according to claim 6, wherein When the sliding column slides to both ends of the guiding sliding groove (5), each primary blade (21) and each secondary blade (22) rotate to the converging position or the unfolded position respectively.

8. The variable aperture mechanism according to claim 5, characterized in that Each primary blade (21) is hierarchically distributed vertically and closely adjoins each other, and each secondary blade (22) is hierarchically distributed vertically and closely adjoins each other; the vertical distribution positions of each primary blade (21) and each secondary blade (22) are staggered.

9. An intelligent optical device, comprising a lens barrel and a variable aperture mechanism disposed within the lens barrel, characterized in that, The variable aperture mechanism is specifically the variable aperture mechanism according to any one of claims 1-8.

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