Diopter adjusting device

Abstract

The invention provides a diopter adjusting device, which comprises a lens frame fixed with a lens module; the screen movement module comprises a cover plate, a driving assembly, a guide assembly and a display screen assembly, the cover plate is fixed to the mirror frame, the driving assembly is arranged on the cover plate, the driving assembly is provided with an output piece extending in the first direction, the guide assembly comprises at least three guide shafts which are fixed to the cover plate and extend in the first direction, and the at least three guide shafts are arranged around the output piece; the display screen assembly is in transmission connection with the output piece and is in sliding connection with the guide shaft, and under the driving of the driving assembly, the display screen assembly can move in the first direction relative to the lens module so as to adjust the diopter. According to the diopter adjusting device, the assembling efficiency and the assembling precision are improved, the display screen assembly can be effectively prevented from deflecting in the using process, the imaging accuracy and definition are improved, and the visual experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lenses, and in particular to a diopter adjustment device. Background Art

[0002] With the continuous development of augmented reality (AR) technology, AR glasses, as an important display device, have gradually received widespread attention. In order to meet the vision needs of different users, AR glasses usually have a diopter adjustment device. The diopter adjustment device can adjust the position of the optical elements of the AR glasses so that the user can obtain a clear imaging effect. However, the installation process of the existing diopter adjustment device is relatively complicated, and multiple components need to be precisely aligned, which not only increases the production cost, but also reduces the production efficiency. In addition, the display screen of the AR glasses is connected to the flexible printed circuit (Flexible Printed Circuit, FPC), and the display screen is prone to deflection under the elastic force of the FPC. Once the display screen is deflected, the propagation path of the light will change, which will affect the accuracy and clarity of the imaging and reduce the user's visual experience.

[0003] Therefore, it is necessary to provide a diopter adjustment device that is easy to assemble and can enhance the user's visual experience. Summary of the invention

[0004] The object of the present invention is to provide a diopter adjustment device to solve the technical problems of difficult installation and skewed display screen in the prior art.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides a diopter adjustment device, comprising:

[0007] A frame fixed to the lens module; and

[0008] A screen motion module comprises a cover plate, a driving assembly, a guide assembly and a display screen assembly, wherein the cover plate is fixed to the lens frame, the driving assembly is arranged on the cover plate, the driving assembly has an output member extending along a first direction, the guide assembly comprises at least three guide shafts fixed to the cover plate and extending along the first direction, at least three guide shafts are arranged around the output member, the display screen assembly is transmission-connected to the output member and slidably connected to the guide shafts, and under the drive of the driving assembly, the display screen assembly can move relative to the lens module along the first direction to adjust the diopter.

[0009] Preferably, the display screen assembly comprises:

[0010] A screen bracket is drivingly connected to the output member and slidably connected to the guide shaft, and a slot is formed at one end of the screen bracket in the first direction; and

[0011] A display screen, which is fixed to the screen support and at least partially received in the card slot.

[0012] Preferably, the guide shaft includes at least two first guide shafts and at least one second guide shaft;

[0013] The screen support includes:

[0014] A first frame body, which is provided with the card slot, and at least two first guide holes are provided on the first frame body, and the first guide holes are slidably connected to the first guide shafts in a one-to-one correspondence;

[0015] A second frame body, which is arranged on one side of the first frame body in a second direction, the second direction is perpendicular to the first direction, at least one second guide hole is provided on the second frame body, and the second guide holes are slidably connected to the second guide shafts in a one-to-one correspondence; and

[0016] A fixing member, which is used to fix the first frame body and the second frame body;

[0017] Wherein, the first frame body and the second frame body jointly define an assembly hole that is drivingly connected to the output member.

[0018] Preferably, the fixing member includes:

[0019] A threaded portion, which is disposed through the second frame body along the second direction and is threadedly connected to the first frame body; and

[0020] A spring portion, which is sleeved on the threaded portion and is compressed between the threaded portion and the second frame body along the second direction, so that the surface of the first guide shaft is in contact with the hole wall of the first guide hole, and the surface of the second guide shaft is in contact with the hole wall of the second guide hole.

[0021] Preferably, the driving assembly further includes a motor fixed to the cover plate, an output shaft of the motor is a worm, and the worm extends along a third direction perpendicular to the first direction;

[0022] The output member includes a worm gear portion and a lead screw portion formed at one end of the worm gear portion in the first direction, the worm gear portion is drivingly connected to the worm, and the lead screw portion is drivingly connected to the display screen assembly.

[0023] Preferably, the screen movement module further includes a magnet and a magnetic sensor;

[0024] The magnet is fixed to an end of the output member and is coaxially arranged with the output member;

[0025] The magnetic sensor is fixed to the cover plate and is used to detect the rotation angle of the magnet.

[0026] Preferably, the frame and the cover plate enclose to form a receiving space, and the display screen assembly is received in the receiving space.

[0027] Preferably, the cover plate is fixedly adhered to the frame by glue.

[0028] Preferably, the guide shaft is press-fitted onto the cover plate with interference.

[0029] Preferably, the screen movement module further includes a limit frame, and the limit frame includes a plate body and a connecting column. The plate body is disposed at an interval from the cover plate in the first direction. One end of the connecting column in the first direction is fixed to the plate body, and the other end of the connecting column in the first direction is fixed to the cover plate;

[0030] One end of the guide shaft in the first direction is fixed to the cover plate, and the other end of the guide shaft in the first direction is fixed to the plate body.

[0031] The beneficial effects of the present invention are as follows: The diopter adjustment device of the present invention adopts a modular design. After assembly, the lens module is fixed to the frame as a whole module. At the same time, after the driving component, the guiding component, and the display screen assembly are assembled onto the cover plate, another whole module, that is, the screen movement module, is fixed to the frame. By dividing the diopter adjustment device into multiple modules, the present invention simplifies the assembly process, effectively solves the technical problem of the complex assembly process caused by installing each part onto the frame one by one in the related art, and improves the assembly efficiency and assembly accuracy. Moreover, the present invention uses at least three guide shafts arranged around the output member, which can guide and limit the display screen assembly more stably, effectively prevent the display screen assembly from being deflected during use, improve the accuracy and clarity of imaging, and enhance the visual experience of users. Description of the Drawings

[0032] Figure 1 It is a three-dimensional structural schematic diagram of the diopter adjustment device of the present invention.

[0033] Figure 2 is Figure 1 an exploded view of the diopter adjustment device shown.

[0034] Figure 3 It is a structural schematic diagram of the screen movement module in the diopter adjustment device of the present invention.

[0035] Figure 4 is Figure 3 a structural schematic diagram of the screen movement module in the diopter adjustment device shown with the limit frame removed.

[0036] Figure 5It is a schematic diagram of the structure of the screen motion module in the diopter adjustment device of the present invention.

[0037] Figure 6 for Figure 5 The schematic diagram of the structure of the screen motion module in the diopter adjustment device shown in FIG. 1 is a schematic diagram of the structure of the screen motion module in the diopter adjustment device without the magnetic sensor and the third circuit board.

[0038] Figure 7 It is a schematic diagram of the structure of the screen motion module in the diopter adjustment device of the present invention.

[0039] Figure 8 for Figure 7 AA section view.

[0040] Figure 9 for Figure 7 BB cross-sectional view.

[0041] Figure 10 This is an exploded view of the screen movement module in the diopter adjustment device of the present invention.

[0042] Figure 11 It is a schematic diagram of the screen support structure in the diopter adjustment device of the present invention. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0044] Please refer to Figures 1 to 10 The embodiment of the present invention provides a diopter adjustment device 100, comprising a lens frame 100a and a screen movement module 100b, wherein the lens frame 100a is fixed to the lens module 100c, and the screen movement module 100b comprises a cover plate 1, a driving assembly 2, a guide assembly 3 and a display screen assembly 4, wherein the cover plate 1 is fixed to the lens frame 100a, the driving assembly 2 is arranged on the cover plate 1, the driving assembly 2 comprises an output member 21, and the output member 21 extends along a first direction, the guide assembly 3 comprises at least three guide shafts 31, each guide shaft 31 is respectively fixed to the cover plate 1, all guide shafts 31 extend along the first direction, and all guide shafts 31 are arranged around the output member 21, and the display screen assembly 4 is transmission-connected to the output member 21, and the display screen assembly 4 is slidably connected to the guide shaft 31. Under the drive of the driving assembly 2, the display screen assembly 4 can move relative to the lens module 100c along the first direction to adjust the distance between the display screen assembly 4 and the lens module 100c, thereby adjusting the diopter.

[0045] In the embodiment of the present invention, the diopter adjustment device 100 adopts a modular design. After assembly, the lens module 100c is fixed to the frame 100a as a whole module. At the same time, after the driving component 2, the guiding component 3, and the display screen component 4 are assembled onto the cover plate 1, another whole module, namely the screen movement module 100b, is formed and fixed to the frame 100a. By dividing the diopter adjustment device 100 into multiple modules in the embodiment of the present invention, the assembly process is simplified, effectively solving the technical problem of complex assembly process caused by installing each part onto the frame 100a one by one in the related art, and improving the assembly efficiency and assembly accuracy. Moreover, in the embodiment of the present invention, at least three guiding shafts 31 are arranged around the output member 21, which can guide and limit the display screen component 4 more stably, effectively preventing the display screen component 4 from tilting during use, improving the accuracy and clarity of imaging, and enhancing the user's visual experience.

[0046] In some preferred embodiments, the guiding shaft 31 is press-fitted onto the cover plate 1 with an interference fit, which not only has a stable structure but also is convenient for assembly, reducing the assembly cost.

[0047] In some preferred embodiments, please refer to Figures 2 to 4 and Figures 7 to 10 , the screen movement module 100b further includes a limiting frame 5, and the display screen component 4 is restricted between the limiting frame 5 and the cover plate 1 in the first direction. The limiting frame 5 includes a plate body 51 and a plurality of connecting columns 52. As an example, the connecting columns 52 and the plate body 51 are integrally formed. The plate body 51 and the cover plate 1 are spaced apart in the first direction. One end of each connecting column 52 in the first direction is on the plate body 51, and the other end of each connecting column 52 in the first direction is fixed to the cover plate 1. One end of the guiding shaft 31 in the first direction is fixed to the cover plate 1, and the other end of the guiding shaft 31 in the first direction is fixed to the plate body 51.

[0048] In this embodiment, a plurality of connecting columns 52 are provided between the plate body 51 and the cover plate 1, which can not only effectively limit the distance between the plate body 51 and the cover plate 1 but also make the connection between the plate body 51 and the cover plate 1 more stable. The plate body 51 and the cover plate 1 cooperate to control the movement range of the display screen component 4 between the plate body 51 and the cover plate 1, which can not only effectively limit the movement range of the display screen component 4 but also effectively protect the display screen component 4.

[0049] In some more preferred embodiments, please refer to Figure 3 , Figure 8 and Figure 10 , the limiting frame 5 includes three connecting columns 52, and the three connecting columns 52 are arranged around the output member 21.

[0050] In some preferred embodiments, please refer to Figures 2 to 4 and Figures 8 to 11, the display screen assembly 4 includes a display screen 41 and a screen support 43. The screen support 43 is drivingly connected to the output member 21 and slidably connected to the guide shaft 31. The display screen 41 is fixed to one side of the screen support 43 in the first direction. A card slot 431 is formed at one end of the screen support 43 in the first direction. At least a part of the display screen 41 is received in the card slot 431, and the screen 411 of the display screen 41 is arranged away from the card slot 431 in the first direction. Among them, at least three guide holes 44 are formed on the screen support 43, and the guide holes 44 are slidably connected to the guide shaft 31 one by one. An assembly hole 45 is also formed on the screen support 43, and the assembly hole 45 is drivingly connected to the output member 21. As an example, an internal thread structure that meshes with the output member 21 is formed on the inner wall of the assembly hole 45.

[0051] In this embodiment, the screen support 43 can effectively support the display screen 41 and improve the strength of the display screen assembly 4. At least a part of the display screen 41 is received in the card slot 431, which can not only make the connection between the display screen 41 and the screen support 43 tighter, make the volume of the display screen assembly 4 smaller, save space, and have a more stable structure, but also reduce the possibility of the display screen 41 loosening due to external force impact or vibration. Moreover, during installation, the display screen 41 can be initially fixed by simply aligning it with the card slot 431 and inserting it. The display screen 41 and the screen support 43 can also be further strengthened by other auxiliary fixing methods such as glue or screws. This embodiment is convenient for disassembly, and maintenance personnel can easily remove the display screen 41 from the card slot 431 for maintenance or replacement, improving the maintenance efficiency. In addition, the screen 411 of the display screen 41 is arranged away from the card slot 431 in the first direction, so the screen support 43 will not block the screen 411, that is, it will not interfere with the imaging of the diopter adjustment device 100.

[0052] In some more preferred embodiments, please refer to Figure 4 , Figure 8 and Figure 10 , the guide shaft 31 includes a first guide shaft 31a and a second guide shaft 31b. Among them, there are at least two first guide shafts 31a and at least one second guide shaft 31b. The screen support 43 includes a first frame body 46, a second frame body 47 and a fixing member 48. The first frame body 46 is fixed to the display screen 41, and at least two first guide holes 44a are formed on the first frame body 46. The first guide holes 44a are slidably connected to the first guide shaft 31a one by one. The second frame body 47 is arranged on one side of the first frame body 46 in the second direction, and the second direction is perpendicular to the first direction. At least one second guide hole 44b is formed on the second frame body 47. The second guide holes 44b are slidably connected to the second guide shaft 31b one by one. The fixing member 48 is used to fix the first frame body 46 and the second frame body 47. Among them, the first frame body 46 and the second frame body 47 jointly define the assembly hole 45.

[0053] In this embodiment, the screen support 43 includes two frames, namely a first frame 46 and a second frame 47. The guiding holes 44 are distributed on the two frames, so that the stress can be evenly dispersed, avoiding structural damage caused by local stress concentration, thereby improving the overall stability of the screen support 43. Moreover, the first frame 46 and the second frame 47 can be installed separately and then connected by fixing members 48, which can effectively reduce the assembly difficulty and improve the assembly efficiency. When maintenance or component replacement is required, the fixing members 48 can be disassembled, and then the first frame 46 and the second frame 47 can be separated, so as to conveniently repair or replace the component. In addition, the first frame 46 and the second frame 47 can be processed separately, reducing the processing complexity of the screen support 43, and the first frame 46 and the second frame 47 can be made of different materials according to actual needs, effectively reducing the production cost.

[0054] As an example, please refer to Figure 8 , the axis of the output member 21 intersects the perpendicular bisector of the first isosceles triangle 200. The plane where the first isosceles triangle 200 is located is perpendicular to the first direction. That is to say, the axis of the output member 21 is perpendicular to the perpendicular bisector of the first isosceles triangle 200. The guiding shaft 31 includes two first guiding shafts 31a and one second guiding shaft 31b. The axis of one first guiding shaft 31a passes through a base angle vertex of the first isosceles triangle 200, the axis of the other first guiding shaft 31a passes through the other base angle vertex of the first isosceles triangle 200, and the axis of the second guiding shaft 31b passes through the apex vertex of the first isosceles triangle 200. Correspondingly, two first guiding holes 44a are formed on the first frame 46, and one second guiding hole 44b is formed on the second frame 47.

[0055] In this embodiment, the two first guiding shafts 31a pass through the two base angle vertices of the isosceles triangle respectively, and the second guiding shaft 31b passes through the apex vertex, forming a stable triangular support structure, further enhancing the structural stability of the display screen assembly 4, so as to more effectively prevent the display screen 41 from deflecting. The axis of the output member 21 intersects the perpendicular bisector, so that the output member 21 can bear a greater load when driving the display screen assembly 4 to move, and it can ensure that the display screen assembly 4 always remains balanced during the movement process, avoiding shaking or offset.

[0056] In some examples, the axis of the output member 21 passes through the geometric center of the first isosceles triangle 200, which can further ensure the stability and accuracy of the movement of the display screen assembly 4.

[0057] It should be noted that in other embodiments, the display screen can be an integral structure, which can be set according to actual situations and will not be elaborated here. In other embodiments, the guiding component can also include more than three guiding shafts, which can be set according to actual situations and will not be elaborated here.

[0058] In some preferred embodiments, please refer to Figure 4 , Figures 7 to 8 , and Figures 10 to 11 , the display screen assembly 4 may include two fixing members 48, and the two fixing members 48 are symmetrically disposed at both ends of the second frame body 47 in the fourth direction, and the fourth direction is perpendicular to the first direction and the second direction.

[0059] In this embodiment, the display screen assembly 4 includes two fixing members 48, which not only has a simple structure, but also enables the screen bracket 43 to be uniformly stressed, reduces structural deformation, and effectively improves the overall stability of the screen bracket 43.

[0060] In some preferred embodiments, please refer to Figure 8 and Figure 10 , the fixing member 48 includes a threaded portion 481 and a spring portion 482. One end of the threaded portion 481 in the second direction passes through the second frame body 47 in the second direction and is threadedly connected to the first frame body 46. The spring portion 482 is sleeved on the outer periphery of the threaded portion 481, and the spring portion 482 is compressed in the second direction between the threaded portion 481 and the second frame body 47, so that the surface of the first guide shaft 31a is in contact with the hole wall of the first guide hole 44a, and the surface of the second guide shaft 31b is in contact with the hole wall of the second guide hole 44b.

[0061] In this embodiment, the spring portion 482 is sleeved on the outer periphery of the threaded portion 481 and is compressed between the threaded portion 481 and the second frame body 47. The elastic force of the spring portion 482 acts on the second frame body 47 to form a pre-tightening force in the second direction. The pre-tightening force is transmitted to the first frame body 46 through the second frame body 47, so that the first frame body 46 and the second frame body 47 are closely attached. At the same time, the pre-tightening force is also transmitted to the guide shaft 31 through the guide hole 44, ensuring that the surface of the guide shaft 31 is in close contact with the hole wall of the guide hole 44, which can improve the motion accuracy and stability of the display screen assembly 4, thereby avoiding the display screen assembly 4 from tilting and ensuring the imaging effect at different diopters.

[0062] In some more preferred embodiments, please refer to Figure 8 and Figure 10, the threaded portion 481 includes a screw rod 483 and a nut 484, and the nut 484 is disposed at one end of the screw rod 483 in the second direction. A first counterbore 471 and a mating hole 472 which are arranged in sequence and communicated with each other in the second direction are formed in the second frame body 47. The mating hole 472 is just suitable for the screw rod 483 to pass through, that is to say, the aperture of the mating hole 472 is equal to the outer diameter of the screw rod 483, and the aperture of the first counterbore 471 is larger than the outer diameter of the screw rod 483. A threaded hole 461 corresponding to the mating hole 472 is formed in the first frame body 46. One end of the screw rod 483 away from the nut 484 passes through the first counterbore 471 and the mating hole 472 in sequence and then is screwed into the threaded hole 461. The spring portion 482 is received in the first counterbore 471. One end of the spring portion 482 in the second direction abuts against the bottom surface of the first counterbore 471, and the other end of the spring portion 482 in the second direction abuts against one side surface of the nut 484 facing the first counterbore 471.

[0063] As an example, please refer to Figure 8 and Figure 10 , a second counterbore 473 is further formed in the second frame body 47, and the second counterbore 473 is disposed at one end of the mating hole 472 away from the first counterbore 471. A boss 462 which is in plug-in fit with the second counterbore 473 is formed on the first frame body 46.

[0064] In the present embodiment, by providing the boss 462 and the second counterbore 473, when the first frame body 46 and the second frame body 47 are butted, accurate plug-in fit can be achieved, which is not only convenient for assembly and improves the assembly accuracy, but also can effectively increase the contact area between the two frame bodies, thereby enhancing the overall structural stability of the screen support 43, and can also reduce the structural looseness or damage caused by external force impact or vibration.

[0065] In some preferred embodiments, please refer to Figures 9 to 11 , one side of the first frame body 46 facing the second frame body 47 in the second direction has a first semi-cylindrical surface 463, one side of the second frame body 47 facing the first frame body 46 in the second direction has a second semi-cylindrical surface 474, and an internal thread structure meshing with the output member 21 is provided on the second semi-cylindrical surface 474. When the first frame body 46 and the second frame body 47 are installed together, the first semi-cylindrical surface 463 and the second semi-cylindrical surface 474 can be butted to form an assembly hole 45.

[0066] In this embodiment, an internal thread structure is provided only on the second semi-cylindrical surface 474, while the first semi-cylindrical surface 463 is a smooth surface. This not only effectively avoids the alignment error problem that may occur when internal thread structures are provided on both semi-cylindrical surfaces, but also realizes a reasonable stress distribution by concentrating the internal thread structure on the second frame body 47, significantly reducing the stress on the first frame body 46 for fixing the display screen 41 and enhancing the stability of the display screen 41. In addition, the internal thread structure on the second semi-cylindrical surface 474 serves as the meshing surface for bearing the transmission load, while the smooth surface of the first semi-cylindrical surface 463 serves as the mating surface for only providing radial support, separating the transmission function from the support function and facilitating the precise compensation of the spring pre-tightening force.

[0067] As an embodiment, please refer to Figure 9 and Figure 10 , the display screen assembly 4 further includes a first circuit board 42, and the first circuit board 42 is an FPC (Flexible Printed Circuit). One end of the first circuit board 42 is connected to the display screen 41, and the other end of the first circuit board 42 is connected to the control main board of the diopter adjustment device 100. Although the first circuit board 42 generates a certain amount of resilience in the bent state, in this embodiment, the pre-tightening force generated by the compressed spring portion 482 effectively cancels the elastic force influence generated when the first circuit board 42 is bent, ensuring that the guide shaft 31 and the guide hole 44 always maintain stable contact, effectively avoiding the skew of the screen bracket 43, and further avoiding the skew of the display screen 41. This embodiment not only solves the problem of the skew of the display screen 41 caused by the deformation of the flexible printed circuit board, but also improves the reliability and service life of the display screen assembly 4.

[0068] In some preferred embodiments, please refer to Figures 2 to 10 , the driving assembly 2 further includes a motor 22, the motor 22 is fixed to the cover plate 1, the output shaft of the motor 22 is a worm 221, and the worm 221 extends in the third direction, and the third direction is perpendicular to the first direction. The output member 21 includes a worm wheel portion 211 and a lead screw portion 212 that are coaxially arranged and fixed together, and the lead screw portion 212 is formed at one end of the worm wheel portion 211 in the first direction. Among them, the worm wheel portion 211 is in transmission connection with the worm 221, and the lead screw portion 212 is in transmission connection with the assembly hole 45 of the display screen assembly 4.

[0069] In this embodiment, the motor 22 drives the output member 21 to rotate around the axis of the output member 21, and then drives the display screen assembly 4 to move in the first direction to adjust the diopter. The electric adjustment has high precision, can preset multiple diopter degree gears, and can also adjust the diopter degree steplessly, which can not only meet the needs of users to adjust the same diopter multiple times, but also meet the needs of different customers with different diopters.

[0070] As an implementation manner, the worm gear portion 211 is a helical worm gear. It should be noted that in other implementation manners, the worm gear portion can also be other types of worm gears, which can be set according to actual situations and will not be elaborated here.

[0071] As an implementation manner, please refer to Figure 9 and Figure 10 , an annular groove 213 is formed in the output member 21 and is arranged around the axis of the output member 21. The annular groove 213 is arranged between the worm gear portion 211 and the lead screw portion 212. The screen movement module 100b further includes an O-ring 6, and the O-ring 6 is clamped in the annular groove 213. The cover plate 1 is restricted between the worm gear portion 211 and the O-ring 6, so that the output member 21 is restricted on the cover plate 1. The output member 21 restricted on the cover plate 1 can only rotate relative to the cover plate 1 around the axis of the output member 21, but cannot move relative to the cover plate 1, thereby effectively ensuring the transmission accuracy between the output member 21, the worm 221 and the display screen assembly 4. One end of the output member 21 away from the motor 22 in the first direction is rotatably inserted into the plate body 51.

[0072] In some preferred implementation manners, please refer to Figure 6 and Figure 10 , the drive assembly 2 further includes a motor bracket 24, and the motor 22 is fixed to the cover plate 1 through the motor bracket 24.

[0073] In some preferred implementation manners, please refer to Figure 5 , Figure 6 , Figure 9 as well as Figure 10 , the drive assembly 2 further includes a magnet 25 and a magnetic sensor 26. The magnet 25 is fixed to the end of the output member 21, and the magnet 25 is coaxially arranged with the output member 21. The magnetic sensor 26 is fixed to the cover plate 1, and the magnetic sensor 26 can sense the change in the magnetic field intensity of the magnet 25, thereby detecting the rotation angle of the magnet 25. Since the magnet 25 is coaxially arranged with the output member 21, the rotation angle of the magnet 25 is the rotation angle of the output member 21. That is to say, the rotation angle of the output member 21 can be accurately detected through the magnetic sensor 26, and then the precise control of the screen movement module 100b can be realized. As an example, the magnetic sensor 26 is a magnetic encoder board, and the magnetic encoder chip of the magnetic encoder board is arranged corresponding to the magnet 25.

[0074] In some more preferred implementation manners, please refer to Figure 2 , Figures 4 to 6 as well as Figure 10 , the drive assembly 2 further includes a second circuit board 23. As an example, the second circuit board 23 is an FPC. One end of the second circuit board 23 is connected to the motor 22, and the other end of the second circuit board 23 is connected to the magnetic sensor 26.

[0075] As an implementation manner, please refer to Figure 2 , Figure 5 , Figure 9 and Figure 10 . The driving assembly 2 further includes a third circuit board 7. Exemplarily, the third circuit board 7 is an FPC. One end of the third circuit board 7 is connected to the magnetic sensor 26, and the other end of the third circuit board 7 is connected to the control main board of the diopter adjustment device 100.

[0076] In some preferred implementation manners, please refer to Figure 1 and Figure 2 . The spectacle frame 100a and the cover plate 1 enclose to form a receiving space, and the display screen assembly 4, the guiding assembly 3 and the output member 21 are all received in the receiving space, so as to effectively protect the display screen assembly 4, the guiding assembly 3 and the output member 21, and further ensure the movement accuracy and stability of the display screen assembly 4.

[0077] In some more preferred implementation manners, the cover plate 1 is fixedly adhered to the spectacle frame 100a by glue. Exemplarily, during installation, the screen movement module 100b is put into the spectacle frame 100a as a whole. After adjusting to align the display screen 41 and the lens assembly, the cover plate 1 and the spectacle frame 100a are fixed by glue, so as to realize the fixed connection between the screen movement module 100b and the spectacle frame 100a, and the installation is convenient.

[0078] It should be noted that in other implementation manners, other structures such as screws can also be used to fix the cover plate and the spectacle frame, which can be set according to actual situations and will not be elaborated here.

[0079] In some implementation manners, please refer to Figure 2 . The lens module 100c includes a compensating mirror 81, a reflecting mirror 82, a first prism 83 and a second prism 84. The compensating mirror 81, the reflecting mirror 82, the first prism 83 and the second prism 84 are fixedly connected in sequence, and the first prism 83 is fixed to the spectacle frame 100a. As an implementation manner, the compensating mirror 81, the reflecting mirror 82, the first prism 83 and the second prism 84 are fixed together by glue to form the lens module 100c, and then the first prism 83 is fixed to the spectacle frame 100a by glue.

[0080] Exemplarily, the imaging process of the virtual image provides an image for the display screen 41, and the image reaches the human eye after passing through the first prism 83, the second prism 84 and the reflecting mirror 82 in sequence. The real image directly passes through the compensating mirror 81, the reflecting mirror 82, the first prism 83 and the second prism 84 in sequence and then presents to the human eye, and the compensating mirror 81 is used to correct the deformation of the real image.

[0081] The diopter adjustment device 100 in the embodiment of the present invention can be applied to intelligent optical devices. Exemplarily, the intelligent optical device can be an AR (Augmented Reality) glasses.

[0082] Exemplarily, the intelligent optical device may include two refractive adjustment devices, and the two refractive adjustment devices include a first refractive adjustment device set for the user's left eye and a second refractive adjustment device set for the user's right eye. Figures 1 to 11 The diopter adjustment device 100 shown is the first refractive adjustment device. It can be understood that the structure of the second refractive adjustment device is symmetric to that of the first refractive adjustment device in the second direction, which will not be elaborated here.

[0083] The above are only the embodiments of the present invention. It should be noted here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all fall within the protection scope of the present invention.

Claims

1. A diopter adjustment device, characterized in that, Comprising: A spectacle frame, fixed to the lens module; And A screen movement module, including a cover plate, a driving component, a guiding component, and a display screen component. The cover plate is fixed to the spectacle frame. The driving component is disposed on the cover plate. The driving component has an output member extending in a first direction. The guiding component includes at least three guiding shafts fixed to the cover plate and extending in the first direction. At least three of the guiding shafts are disposed around the output member. The display screen component is drivingly connected to the output member and slidably connected to the guiding shafts. Driven by the driving component, the display screen component can move relative to the lens module in the first direction to adjust the diopter.

2. The diopter adjustment device according to claim 1, wherein, The display screen component includes: A screen bracket, drivingly connected to the output member and slidably connected to the guiding shafts. One end of the screen bracket in the first direction is provided with a card slot; and A display screen, fixed to the screen bracket and at least partially received in the card slot.

3. The diopter adjustment device according to claim 2, characterized in that, The guiding shafts include at least two first guiding shafts and at least one second guiding shaft; The screen bracket includes: A first frame body, provided with the card slot. At least two first guiding holes are provided on the first frame body. The first guiding holes are slidably connected to the first guiding shafts in one-to-one correspondence; A second frame body, disposed on one side of the first frame body in a second direction. The second direction is perpendicular to the first direction. At least one second guiding hole is provided on the second frame body. The second guiding holes are slidably connected to the second guiding shafts in one-to-one correspondence; and A fixing member, for fixing the first frame body and the second frame body; Wherein, the first frame body and the second frame body jointly define an assembly hole drivingly connected to the output member.

4. The diopter adjustment device according to claim 3, characterized in that, The fixing member includes: A threaded portion, passing through the second frame body in the second direction and threadedly connected to the first frame body; and A spring portion, sleeved on the threaded portion and compressed in the second direction between the threaded portion and the second frame body, so that the surface of the first guiding shaft contacts the pore wall of the first guiding hole, and the surface of the second guiding shaft contacts the pore wall of the second guiding hole.

5. The diopter adjustment device according to claim 1, characterized in that, The driving component further includes a motor fixed to the cover plate. The output shaft of the motor is a worm, and the worm extends in a third direction perpendicular to the first direction; The output member includes a worm gear portion and a lead screw portion formed at one end of the worm gear portion in the first direction. The worm gear portion is drivingly connected to the worm, and the lead screw portion is drivingly connected to the display screen component.

6. The diopter adjustment device according to claim 1, wherein, The screen movement module further includes a magnet and a magnetic sensor; The magnet is fixed to the end of the output member and coaxially disposed with the output member; The magnetic sensor is fixed to the cover plate, for detecting the rotation angle of the magnet.

7. The diopter adjustment device according to claim 1, characterized in that, The spectacle frame and the cover plate enclose a receiving space, and the display screen component is received in the receiving space.

8. The diopter adjustment device according to claim 1, wherein, The cover plate is fixed to the spectacle frame by glue bonding.

9. The diopter adjustment device according to claim 1, characterized in that, The guiding shafts are press-fitted on the cover plate with interference.

10. The diopter adjustment device according to claim 1, characterized in that, The screen motion module further includes a limiting frame, the limiting frame includes a plate body and a connecting column, the plate body is spaced from the cover plate in the first direction, one end of the connecting column in the first direction is fixed to the plate body, and the other end of the connecting column in the first direction is fixed to the cover plate; One end of the guide shaft in the first direction is fixed to the cover plate, and the other end of the guide shaft in the first direction is fixed to the plate body.

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