Trial glasses frame and vision testing method

Abstract

The application relates to the technical field of ophthalmic detection equipment, and discloses a trial lens frame and a visual acuity detection method, which comprises two lens holding mechanisms, a nose frame, a wearing assembly and a pupillary distance detection mechanism. Each lens holding mechanism comprises a lens frame body, a position adjusting assembly and a plug-in piece assembly. The position adjusting assembly is arranged to be capable of adjusting the positions of the plug-in piece assembly in the horizontal direction and the vertical direction, so that the optical center of the test lens on the plug-in piece assembly is aligned with the visual axis of the eyeball of a wearer. The pupillary distance detection mechanism comprises two image acquisition assemblies, and the two image acquisition assemblies are arranged on the corresponding lens frame bodies. The positions of the test lenses are dynamically adjusted by using the position adjusting assembly in combination with the actual pupillary distance value and the visual axis angle difference provided by the pupillary distance detection mechanism, so that the optical center of the test lens is always aligned with the visual axis of the wearer. In this way, the artificial error can be reduced, the detection efficiency and accuracy can be improved, and the accuracy of lens fitting can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of ophthalmic detection equipment, in particular to a trial frame and a vision detection method. BACKGROUND

[0002] The trial frame is a key tool used in the process of vision detection and correction, mainly used to help ophthalmologists or optometrists accurately measure the pupillary distance (PD) and visual axis deviation of the wearer, and ensure that the optical center of the selected lens is accurately aligned with the visual axis of the wearer. The traditional trial frame is usually composed of a simple frame structure, relying on manual adjustment of the lens position to achieve preliminary vision correction. However, with the progress of science and technology and the increasing demand for visual quality, the traditional trial frame gradually shows its limitations in accuracy, convenience and user experience.

[0003] The existing trial frame has the following shortcomings: (1) insufficient accuracy, the traditional trial frame relies on manual adjustment of the lens position, which is not only time-consuming and laborious, but also difficult to achieve high accuracy. Especially when dealing with complex visual axis deviation problems, manual adjustment often cannot provide sufficient accuracy, which may lead to poor vision correction results. (2) Complex operation, the manual adjustment process requires high professional skills and experience, and it is difficult for non-professionals to operate. In addition, errors are easy to occur in the manual adjustment process, increasing the possibility of repeated adjustment and prolonging the entire vision detection time. (3) Lack of real-time feedback, the traditional trial frame cannot monitor the changes of the lens position in real time, so it cannot obtain feedback information in time during the adjustment process. This makes it difficult to ensure that the final adjustment result can fully meet the needs of the wearer even after multiple adjustments. (4) Poor user experience, long-term wearing of the traditional trial frame may cause discomfort to the wearer, especially during the process of multiple adjustments. In addition, due to the tedious adjustment process, the wearer may feel fatigue and impatience, affecting the final detection result. SUMMARY

[0004] The purpose of the present disclosure is to provide a trial frame and a vision detection method to solve the technical problems existing in the related art.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a trial frame, comprising two lens holding mechanisms, a nose frame, a wearing assembly and a pupillary distance detection mechanism.

[0006] Each of the lens holding mechanisms comprises a frame body, a position adjusting assembly and a plug assembly, two of the frame bodies are arranged in a horizontal direction and connected by the nose bridge, one end of the position adjusting assembly is connected to the frame body, the plug assembly is detachably connected to the other end of the position adjusting assembly, the plug assembly is used for receiving a test lens inserted therein, and the position adjusting assembly is arranged to be capable of adjusting the position of the plug assembly in the horizontal direction and the vertical direction, so that the optical center of the test lens on the plug assembly is aligned with the visual axis of the eyeball of the wearer;

[0007] The wearing assembly comprises two temples, and the two temples are arranged on the outward sides of the two frame bodies, respectively.

[0008] The interpupillary distance detecting mechanism comprises two image acquisition assemblies, and the two image acquisition assemblies are arranged on the corresponding frame bodies, respectively.

[0009] Optionally, the lens holding mechanism further comprises a first suction accessory, the position adjusting assembly comprises a motion platform and a parallel kinematic chain assembly, and the plug assembly comprises a protractor and a fixing member.

[0010] The frame body has opposite first and second surfaces, and a first through hole is formed in the middle of the frame body and penetrates the frame body, the first surface is used for being attached to the eye of the wearer, and the first through hole is used for allowing the eye of the wearer to pass through.

[0011] The parallel kinematic chain assembly comprises three parallel kinematic chain groups, the three parallel kinematic chain groups are arranged in a three-fold symmetry along the circumference of the frame body, each of the parallel kinematic chain groups comprises two motion chains, one end of each of the motion chains is movably connected to the second surface, and the other end of each of the motion chains is movably connected to the motion platform.

[0012] A second through hole is formed in the middle of the motion platform and penetrates the motion platform, a third through hole is formed in the middle of the protractor and penetrates the protractor, an axis scale extending along the circumference of the third through hole is arranged on the protractor, the first suction accessory is mounted on the protractor, the protractor is detachably connected to the side of the motion platform away from the parallel kinematic chain assembly through the first suction accessory, so that the central axis of the second through hole can coincide with the central axis of the third through hole.

[0013] The fixing member is arranged on the protractor, and the fixing member is used for fixing the test lens.

[0014] Optionally, the test frame further comprises a position sensor and an angle sensor, the position adjusting assembly further comprises a first gimbal and a second gimbal, and the motion chain comprises a telescopic rod and an electric cylinder group.

[0015] The telescopic rod comprises a first pipe segment and a second pipe segment sleeved on the first pipe segment, the first pipe segment is slidably connected in the second pipe segment, one end of the second pipe segment away from the first pipe segment is movably connected to the mirror frame body through the first universal joint, and one end of the first pipe segment away from the second pipe segment is movably connected to the movement platform through the second universal joint;

[0016] The electric cylinder group is arranged on the outer wall of one end of the second pipe segment close to the mirror frame body, and the driving end of the electric cylinder group is in transmission connection with the first pipe segment, so that the first pipe segment can move in the second pipe segment;

[0017] The position sensor is arranged on the first pipe segment to detect the position change of the first pipe segment relative to the second pipe segment;

[0018] The angle sensor is arranged on the movement platform to detect the angle of rotation or the distance of movement of the movement platform relative to the mirror frame body;

[0019] The number of the first universal joints, the number of the second universal joints, the number of the position sensors and the number of the electric cylinder groups correspond to the number of the telescopic rods one by one.

[0020] Optionally, the lens holding mechanism further comprises two oppositely arranged first mounting seats and two oppositely arranged second mounting seats, the position adjusting assembly further comprises two oppositely arranged first connecting seats and two oppositely arranged second connecting seats, the first universal joint comprises a first connecting block, a first rotating shaft and a second rotating shaft, and the second universal joint comprises a second connecting block, a first rotating shaft and a second rotating shaft.

[0021] The two first mounting seats are arranged on the mirror frame body, the two second mounting seats are arranged on the movement platform, the two first connecting seats are arranged on one end of the second pipe segment away from the first pipe segment, and the two second connecting seats are arranged on one end of the first pipe segment away from the second pipe segment.

[0022] The first connecting block is formed with a first connecting hole and a second connecting hole, the first connecting hole penetrates through the first connecting block along the axial direction of the first connecting block, the second connecting hole penetrates through the first connecting block along the radial direction of the first connecting block, and the first connecting hole and the second connecting hole are arranged at a perpendicular angle.

[0023] The first rotating shaft penetrates through the first connecting hole, and the two ends of the first rotating shaft are respectively connected to the two first mounting seats.

[0024] The second rotating shaft is arranged through the second connecting hole, and two ends of the second rotating shaft are connected to the two second connecting seats, respectively.

[0025] The first through hole and the second through hole are formed on the second connecting block, the first through hole penetrates the second connecting block along the axial direction of the second connecting block, the second through hole penetrates the second connecting block along the radial direction of the second connecting block, and the first through hole and the second through hole are arranged at a perpendicular angle.

[0026] The first rotating shaft is arranged through the first through hole, and two ends of the first rotating shaft are connected to the two second mounting seats, respectively.

[0027] The second rotating shaft is arranged through the second through hole, and two ends of the second rotating shaft are connected to the two second connecting seats, respectively.

[0028] Optionally, the lens holding mechanism further comprises a first magnetic part.

[0029] The first suction accessory is configured as a magnet, the movement platform is provided with a mounting cavity, one end of the mounting cavity is an open end, and the other end is a closed end, and the first magnetic part is connected in the mounting cavity.

[0030] The first suction accessory is arranged in the mounting cavity through the open end and is attracted to the first magnetic part.

[0031] The number of the first suction accessories is multiple, the first suction accessories are arranged at intervals along the circumference of the index disc, and the number of the mounting cavities, the number of the magnetic parts and the number of the first suction accessories correspond one by one.

[0032] Optionally, the fixing member comprises a first fixing part and a second fixing part, and the insert piece assembly further comprises a second suction accessory.

[0033] The first fixing part is arranged on the side of the index disc away from the first suction accessory, and the second fixing part is rotatably connected to the side of the index disc away from the first suction accessory and has a closed position close to the first fixing part and an open position away from the first fixing part.

[0034] The second suction accessory is mounted on the index disc, and the second suction accessory is used to suction and fix the second fixing part to the index disc when the second fixing part is in the closed position.

[0035] The first fixing part is provided with a first clamping groove capable of clamping the test lens, and the second fixing part is provided with a second clamping groove capable of clamping the test lens.

[0036] In the closed position, the first clamping groove and the second clamping groove are arranged opposite to each other along the up-down direction.

[0037] The first clamping groove is a plurality of first clamping grooves, and the plurality of first clamping grooves are arranged at intervals along the length direction of the first fixing part and constitute a first clamping groove group.

[0038] The second clamping groove is a plurality of first clamping grooves, and the plurality of first clamping grooves are arranged at intervals along the length direction of the first fixing part and constitute a first clamping groove group.

[0039] Optionally, the second suction accessory includes a magnetic suction accessory.

[0040] The second fixing part is made of a magnetic material, so that the second fixing part can be attracted to the magnetic suction accessory; or, a second magnetic part is arranged on the side of the second fixing part close to the second clamping groove, and the second magnetic part can be attracted to the magnetic suction accessory.

[0041] Optionally, the image acquisition assembly includes a plurality of cameras.

[0042] The plurality of cameras are arranged on the side of the movement platform facing the frame body, and the plurality of cameras are arranged at intervals along the circumference of the second through hole. Each camera is used to capture the image of the wearer's eye.

[0043] Optionally, the trial frame further includes a control system.

[0044] The position adjusting assembly and the interpupillary distance detection mechanism are electrically connected to the control system.

[0045] The present disclosure also provides a vision detection method based on the trial frame described above, including the following steps:

[0046] Step 1: Real-time capture and collection of the image of the wearer's eye by the interpupillary distance detection mechanism, calculation of the distance between the centers of the pupils of the two eyes, i.e. the interpupillary distance, by the image processing algorithm in the control system.

[0047] Step 2: Calculation of the amount of position adjustment required by the control system based on the measurement results provided by the interpupillary distance detection mechanism and the amount of visual axis deviation, and conversion of the control command to the position adjusting assembly;

[0048] Step 3: Adjustment of the position of the insert assembly by the control system through the position adjusting assembly, and real-time monitoring of the position of the insert assembly by the position sensor and the angle sensor to ensure that the optical center of the test lens on the insert assembly is always aligned with the corresponding visual axis.

[0049] Step four: after the adjustment is completed, the control system starts the interpupillary distance detection mechanism again to recapture the images of the wearer's eyes to verify the adjustment effect;

[0050] Step five: according to the feedback of the wearer and the analysis result of the control system, steps one to four are repeated for multiple iterations of optimization until the optical center of the test lens on the insert piece assembly is always aligned with the corresponding visual axis.

[0051] By the above technical solution, the cooperation of the wearing assembly and the nose frame can enable the entire trial frame to be stably and comfortably worn on the wearer's head, so that the two frame bodies can be aligned with and fit the wearer's eyes.

[0052] In addition, since one end of the position adjustment assembly is connected with the frame body and the other end of the position adjustment assembly is detachably connected with the insert piece assembly, the position of the insert piece assembly in space (horizontal direction and vertical direction) can be adjusted through the position adjustment assembly, so that the position of the test lens on the insert piece assembly can be adjusted, such as moving left and right, up and down, or rotating, to compensate for the visual axis deviation problem, and thus the optical center of the test lens can be aligned with the wearer's eye visual axis.

[0053] In addition, the interpupillary distance detection mechanism can capture and collect the images of the corresponding eye regions through each image collection assembly to determine the position of the pupil center of each eye, and the distance between the pupil centers of the two eyes can be calculated through the control system to accurately measure the interpupillary distance of the wearer.

[0054] Based on the interpupillary distance data provided by the image collection assembly and the pre-recorded test lens data, the control system can dynamically adjust the position of the test lens on the insert piece assembly through the position adjustment assembly, so that the optical center of the test lens can be always aligned with the visual axis of the wearer. That is, the control system can use the pre-recorded data, combined with the actual interpupillary distance value and the visual axis angle difference provided by the interpupillary distance detection mechanism, to dynamically adjust the position of the test lens to ensure that the optical center of the test lens is always aligned with the visual axis of the wearer. In this way, during the ophthalmic examination, on the one hand, the visual experience of the wearer can be significantly improved, and the situation of increasing or decreasing the test lens power due to visual axis deviation can be avoided, thereby improving the accuracy of lens fitting; on the other hand, the test lens position can be adjusted and aligned with the visual axis through the automatic control system, so that the most suitable test lens configuration for the wearer can be quickly and accurately found, human error can be reduced, and the detection efficiency and accuracy can be improved.

[0055] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments section. BRIEF DESCRIPTION OF DRAWINGS

[0056] The accompanying drawings are used to provide further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure, but do not constitute a limitation of the present disclosure.

[0057] In the attached figure:

[0058] Figure 1 is a structural schematic diagram of a trial spectacles frame provided by an exemplary embodiment of the present disclosure, wherein the second fixing portion is in a closed position;

[0059] Figure 2 is a structural schematic diagram of a trial spectacles frame provided by an exemplary embodiment of the present disclosure, wherein the second fixing portion is in an open position;

[0060] Figure 3 1 is a schematic structural diagram of the connection between the frame body and the position adjustment assembly of a trial spectacles frame provided by an exemplary embodiment of the present disclosure;

[0061] Figure 4 1 is a schematic structural diagram of the connection between a first universal joint, a second universal joint, and a telescopic rod of a trial glasses frame provided by an exemplary embodiment of the present disclosure;

[0062] Figure 5 1 is a schematic structural diagram of an insert assembly of a trial spectacles frame provided by an exemplary embodiment of the present disclosure from a first viewing angle, wherein the second fixing portion is in a closed position;

[0063] Figure 6 1 is a schematic structural diagram of an insert assembly of a trial spectacles frame provided by an exemplary embodiment of the present disclosure from a second viewing angle, wherein the second fixing portion is in a closed position;

[0064] Figure 7 1 is a schematic structural diagram of an insert assembly of a trial spectacles frame provided by an exemplary embodiment of the present disclosure from a third viewing angle, wherein the second fixing portion is in an open position;

[0065] Figure 8 Schematic diagram of the structure of a position adjustment assembly of a trial glasses frame provided by an exemplary embodiment of the present disclosure.

[0066] 10. Lens holding mechanism; 11. Frame; 111. First through hole; 12. Position adjustment assembly; 121. Motion platform; 122. Parallel kinematic chain assembly; 1221. Kinematic chain; 1222. Telescopic rod; 12221. First pipe section; 12222. Second pipe section; 1223. Electric cylinder assembly; 123. Second through hole; 124. First universal joint; 1241. First connecting block; 1242. First rotating shaft; 1243. Second rotating shaft; 125. Second universal joint; 1251. Second connecting block; 1252. First rotating shaft; 1253. Second rotating shaft; 126. First connecting block Seat; 127, second connecting seat; 128, mounting cavity; 13, insert assembly; 131, indexing plate; 132, fixing part; 1321, first fixing part; 1322, second fixing part; 1323, first card slot; 1324, second card slot; 133, third through hole; 134, second adsorption part; 135, second magnetic part; 14, first adsorption part; 15, first mounting seat; 16, second mounting seat; 20, nose bridge; 30, wearing assembly; 31, temple; 40, pupil distance detection mechanism; 41, image acquisition assembly; 411, camera; 50, position sensor; 51, angle sensor. DETAILED DESCRIPTION

[0067] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0068] In the description of the present disclosure, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only used to facilitate the description of the present disclosure and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, a specific direction structure and operation, and therefore should not be understood as limiting the present disclosure. For example, see Figure 1 , Figure 1 The upper side of the drawing is the “up” side. Figure 1 In the drawing direction, the upper side is the “lower” side, and “inside” and “outside” refer to the inside and outside of the corresponding structure outline. In addition, the terms “first” and “second” are only used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0069] In the description of the present disclosure, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "linked", "mounted" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances.

[0070] As Figures 1 to 8 shown, the present disclosure provides a test frame, comprising two lens holding mechanisms 10, a nose frame 20, a wearing assembly 30 and a pupillary distance detection mechanism 40, each lens holding mechanism 10 comprises a frame body 11, a position adjusting assembly 12 and a plug-in assembly 13, the two frame bodies 11 are arranged in a horizontal direction and are connected by the nose frame 20, one end of the position adjusting assembly 12 is connected to the frame body 11, the plug-in assembly 13 is detachably connected to the other end of the position adjusting assembly 12, the plug-in assembly 13 is used for receiving a test lens inserted, the position adjusting assembly 12 is arranged to be capable of adjusting the position of the plug-in assembly 13 in the horizontal direction and the vertical direction, so that the optical center of the test lens on the plug-in assembly 13 is aligned with the visual axis of the eyeball of the wearer, the wearing assembly 30 comprises two temples, the two temples are respectively arranged on the outward side of the two frame bodies 11, the pupillary distance detection mechanism 40 comprises two image acquisition assemblies 41, the two image acquisition assemblies 41 are respectively arranged on the corresponding frame bodies 11.

[0071] Three points need to be explained, the first point is that the visual axis is a hypothetical straight line from the fixation point through the nodal point of the eye to the foveal center, that is, the actual path of the light entering the eye and finally forming a clear image on the retina. The optical axis is a straight line passing through the center of the cornea, the center of the lens, and perpendicular to these surfaces, that is, the theoretical axis when it is an ideal spherical lens. In a normal eye, the visual axis has an angle deviation of about 4°-5° relative to the optical axis, that is, the visual axis is actually located on the nasal side of the optical axis (i.e. close to the nose side), and there is a small angle between the visual axis and the optical axis. This angle difference indicates that the light does not enter the eye along the optical axis and directly reach the foveal center, but enters the eye along the visual axis and focuses at the foveal center. Therefore, when detecting vision, this angle difference must be considered to ensure the best visual correction effect.

[0072] Secondly, the eyeball of human being can make complex three-dimensional movement in the eye socket. Specifically, the eyeball can rotate around three orthogonal axes (horizontal axis, vertical axis and front-back axis), so that the eye can look in all directions. However, as the eyeball rotates, the visual axis will also change position accordingly. For example, when we turn from looking straight ahead to looking to the side, the visual axis moves in the horizontal direction; while when we look up or down, the visual axis changes in the vertical direction. Therefore, when prescribing glasses for the wearer, although the main concern is the alignment of the optical center and the interpupillary distance in the static state (i.e. straight ahead), when designing some special purpose glasses (such as progressive multifocal test lenses), the needs of the wearer's eye rotation in daily activities also need to be considered to ensure good visual experience in all directions of view.

[0073] Thirdly, the relevant information (such as the position of the optical center, the diopter number, the axis position, etc.) of the test lenses (test lenses for refraction) on the trial frame is known. Therefore, before use, the optometrist or technician can enter the relevant information (such as the position of the optical center, the diopter number, the axis position, etc.) of each test lens into the control system described below.

[0074] Through the above technical solution, through the cooperation of the wearing assembly 30 and the nose frame 20, the entire trial frame can be stably and comfortably worn on the head of the wearer, so that the two frame bodies 11 can be aligned and fitted with the eyes of the wearer.

[0075] And since one end of the position adjusting assembly 12 is connected with the frame body 11 and the other end of the position adjusting assembly 12 is detachably connected with the plug-in piece assembly 13, the position of the plug-in piece assembly 13 in space (horizontal direction and vertical direction) can be adjusted through the position adjusting assembly 12, so that the test lens on the plug-in piece assembly 13 can be adjusted in position, such as moving left and right, up and down, or rotating, to compensate for the visual axis deviation problem, so that the optical center of the test lens can be aligned with the visual axis of the wearer's eyeball.

[0076] In addition, through the set interpupillary distance detection mechanism 40, each image acquisition assembly 41 can capture and acquire the image of the corresponding eye area to determine the position of the pupil center of each eye, and the distance between the pupil centers of the two eyes can be calculated through the control system described below to accurately measure the interpupillary distance of the wearer.

[0077] Based on the pupillary distance data provided by the image acquisition component 41 and the pre-recorded test lens data, the control system described below can dynamically adjust the test lens on the insert component 13 by controlling the position adjustment component 12, so as to always align the optical center of the test lens with the visual axis of the wearer. That is, the control system described below can use the pre-recorded data in combination with the actual pupillary distance value and the visual axis angle difference provided by the pupillary distance detection mechanism 40 to dynamically adjust the position of the test lens, ensuring that the optical center of the test lens is always aligned with the visual axis of the wearer. In this way, during the ophthalmic examination, on the one hand, the visual experience of the wearer can be significantly improved, and the situation of increasing or decreasing the test lens power due to the visual axis offset can be avoided, thereby improving the accuracy of the lens fitting; on the other hand, the test lens position can be adjusted and aligned with the visual axis through the automatic control system, thereby quickly and accurately finding the most suitable test lens configuration for the wearer, reducing human error, and improving detection efficiency and accuracy.

[0078] In some examples, the wearing component 30 includes two elastic bands, a hard hair magic tape, and a soft hair magic tape, the two elastic bands are respectively connected to the outward sides of the two frame bodies 11, one of the two elastic bands is provided with a hard hair magic tape at an end away from the frame body 11, and the other of the two elastic bands is provided with a soft hair magic tape at an end away from the frame body 11. The design of the elastic bands and the magic tapes can make the wearing component 30 adapt to various different head shapes and sizes, reduce the pressure on the head, and improve the comfort of wearing.

[0079] As an implementation manner, as Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the lens holding mechanism 10 further comprises a first suction accessory 14, the position adjusting assembly 12 comprises a motion platform 121, a parallel kinematic chain assembly 122, a first universal joint 124 and a second universal joint 125, the insert piece assembly 13 comprises an index plate 131 and a fixing member 132, the frame body 11 has opposite first and second surfaces, a first through hole 111 is formed in the middle of the frame body 11 and penetrates the frame body 11, the first surface is used to be fitted with the eye of the wearer, the first through hole 111 is used for the eye of the wearer to pass through, the parallel kinematic chain assembly 122 comprises three parallel kinematic chain 1221 groups, the three parallel kinematic chain 1221 groups are arranged in three pairs of symmetry along the circumference of the frame body 11, each parallel kinematic chain 1221 group comprises two kinematic chains 1221, one end of each kinematic chain 1221 is movably connected to the second surface, the other end of each kinematic chain 1221 is movably connected to the motion platform 121, a second through hole 123 is formed in the middle of the motion platform 121 and penetrates the motion platform 121, an index plate 131 is formed in the middle of the index plate 131 and penetrates the index plate 131, an axis position scale extending along the circumference of the third through hole 133 is arranged on the index plate 131, the first suction accessory 14 is installed on the index plate 131, the index plate 131 can be detachably connected to the side of the motion platform 121 away from the parallel kinematic chain assembly 122 through the first suction accessory 14, so that the central axis of the second through hole 123 can coincide with the central axis of the third through hole 133, and the fixing member 132 is arranged on the index plate 131 and used to fix the test lens.

[0080] In this way, the high flexibility of the parallel kinematic chain assembly 122 can be utilized to finely adjust the insert piece assembly 13 in space, so as to accurately compensate for the visual axis deviation problem, and align the optical center of the test lens on the insert piece assembly 13 with the visual axis of the wearer. At the same time, through the design of the axis position scale on the index plate 131 and the first suction accessory 14, not only the accurate positioning and quick replacement of the test lens can be facilitated, but also the operation convenience and practicability of the whole trial frame can be improved.

[0081] As an embodiment, as Figure 1 , Figure 4 and Figure 8As shown, the trial frame further comprises a position sensor 50 and an angle sensor 51, the position adjustment assembly 12 further comprises a first gimbal 124 and a second gimbal 125, the movement chain 1221 comprises a telescopic rod 1222 and an electric cylinder set 1223, the connecting rod is configured as the telescopic rod 1222, the telescopic rod 1222 comprises a first tube segment 12221 and a second tube segment 12222 sleeved on the first tube segment 12221, the first tube segment 12221 is slidably connected in the second tube segment 12222, an end of the second tube segment 12222 away from the first tube segment 12221 is movably connected to the frame body 11 through the first gimbal 124, an end of the first tube segment 12221 away from the second tube segment 12222 is movably connected to the movement platform 121 through the second gimbal 125, the electric cylinder set 1223 is arranged on the outer wall of the end of the second tube segment 12222 close to the frame body 11, the driving end of the electric cylinder set 1223 is in transmission connection with the first tube segment 12221, so that the first tube segment 12221 can move in the second tube segment 12222, the position sensor 50 is arranged on the first tube segment 12221 to detect the position change of the first tube segment 12221 relative to the second tube segment 12222, and the angle sensor 51 is arranged on the movement platform 121 to detect the angle of rotation or the distance of movement of the movement platform 121 relative to the frame body 11, wherein the number of the first gimbal 124, the number of the second gimbal 125, the number of the position sensor 50, the number of the electric cylinder set 1223 and the number of the telescopic rod 1222 correspond one by one.

[0082] The position sensor 50 is installed on the first tube segment 12221 to detect the position change of the first tube segment 12221 relative to the second tube segment 12222. This enables the control system described below to monitor and adjust the position of the test lens in real time.

[0083] The angle sensor 51 is installed on the movement platform 121 to detect the angle of rotation or the distance of movement of the movement platform 121 relative to the frame body 11. This helps to further improve the accuracy of the position adjustment of the test lens.

[0084] In this way, the telescopic rod 1222 and the gimbal can be combined with an automatic control system (including the position sensor 50 and the angle sensor 51) to achieve highly accurate adjustment of the position of the test lens. In this way, not only can the accuracy and efficiency of the lens fitting process be improved, but also the visual experience of the wearer can be significantly improved. In this way, the trial frame can dynamically adjust the position of the test lens according to the specific conditions of each wearer's eyes to ensure the best vision correction effect. In addition, human error can be reduced, the detection speed can be accelerated, and the overall operation convenience and practicality can be improved.

[0085] As an embodiment, as Figure 4As shown, the lens holding mechanism 10 further comprises two oppositely arranged first mounting seats 15 and two oppositely arranged second mounting seats 16, and the position adjusting assembly 12 further comprises two oppositely arranged first connecting seats 126 and two oppositely arranged second connecting seats 127. The first universal joint 124 comprises a first connecting block 1241, a first rotating shaft 1242 and a second rotating shaft 1243, and the second universal joint 125 comprises a second connecting block 1251, a first rotating shaft 1252 and a second rotating shaft 1253. The two first mounting seats 15 are arranged on the frame body 11, the two second mounting seats 16 are arranged on the moving platform 121, the two first connecting seats 126 are arranged on one end of the second pipe segment 12222 away from the first pipe segment 12221, and the two second connecting seats 127 are arranged on one end of the first pipe segment 12221 away from the second pipe segment 12222. The first connecting block 1241 is formed with a first connecting hole and a second connecting hole. The first connecting hole penetrates through the first connecting block 1241 along the axial direction of the first connecting block 1241, and the second connecting hole penetrates through the first connecting block 1241 along the radial direction of the first connecting block 1241, so that the first connecting hole and the second connecting hole are arranged at a perpendicular angle. The first rotating shaft 1242 penetrates through the first connecting hole, and the two ends of the first rotating shaft 1242 are connected to the two first mounting seats 15, respectively. The second rotating shaft 1243 penetrates through the second connecting hole, and the two ends of the second rotating shaft 1243 are connected to the two first connecting seats 126, respectively. The second connecting block 1251 is formed with a first through hole and a second through hole. The first through hole penetrates through the second connecting block 1251 along the axial direction of the second connecting block 1251, and the second through hole penetrates through the second connecting block 1251 along the radial direction of the second connecting block 1251, so that the first through hole and the second through hole are arranged at a perpendicular angle. The first rotating shaft 1252 penetrates through the first through hole, and the two ends of the first rotating shaft 1252 are connected to the two second mounting seats 16, respectively. The second rotating shaft 1253 penetrates through the second through hole, and the two ends of the second rotating shaft 1253 are connected to the two second connecting seats 127, respectively.

[0086] The first connecting block 1241 can be connected to the first mounting seat 15 on the frame body 11 and the first connecting seat 126 on the telescopic rod 1222 through the first rotating shaft 1242 and the second rotating shaft 1243, respectively, to realize multi-directional rotation freedom.

[0087] The second connecting block 1251 can be connected to the second mounting seat 16 on the moving platform 121 and the second connecting seat 127 on the telescopic rod 1222 through the first rotating shaft 1252 and the second rotating shaft 1253, respectively, to also provide multi-directional rotation freedom.

[0088] The biaxial rotation mechanism of the first universal joint 124 and the second universal joint 125 allows the telescopic rods 1222 to be adjusted in multiple directions, thereby achieving fine control of the position of the test lens assembly 13.

[0089] Specifically, first, before starting the adjustment, the test frame can be brought to an initial state, i.e., the frame body 11 and the movement platform 121 are both parallel to the wearer's eyes, and the center axes of the first through hole 111, the second through hole 123, and the third through hole 133 are coincident.

[0090] Second, the pupil centers of the wearer's eyes can be captured using the image acquisition assembly 41 in the interpupillary distance detection mechanism 40, and the actual interpupillary distance can be calculated.

[0091] Then, for horizontal adjustment, when it is found that the test lens on one side is offset relative to the visual axis, the length of the corresponding telescopic rods 1222 on that side can be increased or decreased to make the adjustment. For example, when the test lens for the right eye needs to be moved inward, the two telescopic rods 1222 on the right side can be shortened; conversely, the same applies to the left side.

[0092] For vertical adjustment, the length of the telescopic rods 1222 at the top or bottom can be changed. When the test lens needs to be moved upward, the length of the telescopic rods 1222 at the top can be shortened; when it needs to be moved downward, the length of the telescopic rods 1222 at the bottom can be shortened.

[0093] For rotational angle adjustment, when rotation around the horizontal axis is needed (e.g., to compensate for the visual axis deviation of the wearer's eye), the length of the two telescopic rods 1222 on one side (e.g., the upper side) can be increased, and the length of the two telescopic rods 1222 on the opposite side (the lower side) can be decreased. This can generate a moment on the movement platform 121, causing the movement platform 121 to rotate around the horizontal axis to the desired angle. Similarly, when rotation around the vertical axis is needed, the lengths of the telescopic rods 1222 on the front and back sides can be adjusted.

[0094] Further, based on sensor feedback (e.g., the angle sensor 51), the telescopic rods 1222 at the top and bottom can be adjusted slightly to ensure that no additional up-down movement or tilting occurs. In combination with the position sensor 50 installed on the movement platform 121, the angle of rotation or the distance of movement of the movement platform 121 relative to the frame body 11 can be detected, thereby further improving the accuracy of position adjustment.

[0095] Finally, after the preliminary adjustment is completed, a simple visual test is performed, allowing the wearer to try the visual effect in different visual directions and check for any blurring or other discomfort. Based on the feedback from the wearer, certain parameters can be fine-tuned until the best visual experience is achieved.

[0096] In this way, the optical center of the test lens on the motion platform 121 can be effectively aligned with the visual axis of the wearer, thereby providing more accurate vision correction. In this way, not only can the accuracy of the lens fitting be improved, but the comfort and satisfaction of the wearer can also be enhanced.

[0097] It should be noted that the position adjustment of the motion platform 121 is a small adjustment, which can avoid the situation that the line of sight of the wearer is blocked.

[0098] Optionally, the telescopic rod 1222 can be made of transparent material, such as polycarbonate or acrylic. The transparent telescopic rod 1222 can minimize the interference with the wearer's line of sight, which can help to maintain the natural visual experience of the wearer. In addition, the transparent material is lighter than the metal material, which can help to reduce the weight of the device and improve the comfort of the wearer.

[0099] As an embodiment, as shown in Figure 1 , Figure 3 , Figure 5 The lens holding mechanism 10 further comprises a first magnetic part, the first suction member 14 is configured as a magnet, and the motion platform 121 is formed with a mounting cavity 128. One end of the mounting cavity 128 is open, and the other end is closed. The first magnetic part is connected in the mounting cavity 128. The end of the first suction member 14 away from the index plate 131 is inserted into the mounting cavity 128 through the open end and is attracted to the first magnetic part. The number of first suction members 14 is multiple, and the multiple first suction members 14 are arranged along the circumference of the index plate 131. The number of mounting cavities 128, the number of magnetic parts, and the number of first suction members 14 correspond one by one.

[0100] The mounting cavity 128 can play a guiding role, that is, the first suction member 14 moves along a predetermined path (the extension direction of the mounting cavity 128) during insertion to accurately align the first suction member 14 with the first magnetic part. This guiding mechanism not only helps to reduce the need for manual adjustment and improve assembly efficiency, but also effectively prevents the first suction member 14 from shifting or tilting during insertion.

[0101] The multiple first suction members 14 are arranged along the circumference of the index plate 131 to uniformly distribute the attractive force, which can stably fix the index plate 131 on the motion platform 121 and prevent it from shifting or tilting.

[0102] The number of mounting cavities 128, the number of first magnetic parts, and the number of first suction members 14 correspond one by one. This means that each first suction member 14 has a corresponding mounting cavity 128 and first magnetic part, ensuring the stability and accuracy of the connection.

[0103] Specifically, when the plug-in assembly 13 needs to be installed, the index disc 131 can be first moved close to the moving platform 121 so that each first suction member 14 can be aligned with the open end of the corresponding installation cavity 128. Then the index disc 131 is further moved so that all the first suction members 14 can be sequentially inserted into the corresponding installation cavities 128 and attracted to the first magnetic part, thereby completing the connection of the index disc 131 and the moving platform 121. When the plug-in assembly 13 needs to be disassembled, the index disc 131 and the moving platform 121 can be quickly separated by simply separating them.

[0104] As an embodiment, as shown in Figure 1 、 Figure 2 、 Figure 6 and Figure 7 , the fixing member 132 includes a first fixing part 1321 and a second fixing part 1322, and the plug-in assembly 13 further includes a second suction member 134. The first fixing part 1321 is arranged on the side of the index disc 131 away from the first suction member 14. The second fixing part 1322 is rotatably connected to the side of the index disc 131 away from the first suction member 14 and has a closed position close to the first fixing part 1321 and an open position away from the first fixing part 1321. The second suction member 134 is mounted on the index disc 131 and is used to suction and fix the second fixing part 1322 to the index disc 131 when the second fixing part 1322 is in the closed position. The first fixing part 1321 is formed with a first clamping groove 1323 capable of clamping the test lens. The second fixing part 1322 is formed with a second clamping groove 1324 capable of clamping the test lens. In the closed position, the first clamping groove 1323 and the second clamping groove 1324 are arranged opposite to each other in the up-down direction. The first clamping groove 1323 is a plurality of first clamping grooves 1323 arranged in the length direction of the first fixing part 1321 and constitutes a first clamping groove 1323 group. The second clamping groove 1324 is a plurality of first clamping grooves 1323 arranged in the length direction of the first fixing part 1321 and constitutes a first clamping groove 1323 group.

[0105] Specifically, when the second fixing part 1322 is in the open position, the test lens can be placed in the first clamping groove 1323 of the first fixing part 1321. Then the second fixing part 1322 is closed so that the second clamping groove 1324 on the second fixing part 1322 is arranged opposite to the first clamping groove 1323 of the first fixing part 1321 in the up-down direction, and the test lens is clamped together. The second fixing part 1322 in the closed position can be stably suctioned and fixed to the index disc 131 by the second suction member 134, thereby preventing the second fixing part 1322 from being accidentally opened or loosened.

[0106] The design of the plurality of first clamping grooves 1323 and the plurality of second clamping grooves 1324 can provide flexibility and can adapt to test lenses of different thicknesses and shapes. For example, the wearer can need to correct myopia and astigmatism at the same time, and in this case, a spherical test lens (for correcting myopia or hyperopia) can be used in combination with a cylindrical test lens (for correcting astigmatism).

[0107] As an implementation, the second magnetic clamping member 134 comprises a magnetic clamping member, and the second fixing portion 1322 is made of a magnetic material, so that the second fixing portion 1322 can be attracted to the magnetic clamping member.

[0108] By using the magnetic clamping member and the second fixing portion 1322 made of a magnetic material, this design not only enables efficient fixing of the test lens, but also greatly simplifies the operation process, and can improve the convenience and reliability of use.

[0109] As another implementation, as shown in Figures 6 to 7 the second fixing portion 1322 is provided with a second magnetic portion 135 on the side close to the second clamping groove 1324, and the second magnetic portion 135 can be attracted to the magnetic clamping member.

[0110] By providing the second magnetic portion 135 on the side of the second fixing portion 1322 close to the second clamping groove 1324 and attracting it to the magnetic clamping member, this design not only improves the reliability and stability of the test lens fixation, but also simplifies the operation process, and can improve the user's experience.

[0111] In order to ensure comprehensive coverage of the eye area, as an implementation, as shown in Figure 8 the image acquisition assembly 41 comprises a plurality of cameras 411, and the plurality of cameras 411 are arranged on the side of the movement platform 121 facing the frame body 11, and the plurality of cameras 411 are arranged circumferentially along the second through hole 123, and each camera 411 is used to capture an image of the wearer's eye.

[0112] Among them, the plurality of cameras 411 work at the same time, and capture images of the wearer's eyes from different angles, which can realize omnidirectional image acquisition of the wearer's eyes, thereby improving the measurement accuracy.

[0113] In order to realize the automation and accurate control of the entire measurement process, as an implementation, the test lens holder further comprises a control system, and the position adjusting assembly 12 and the interpupillary distance detection mechanism 40 are electrically connected to the control system.

[0114] Among them, the control system can include a microprocessor, a memory, a communication interface and other hardware parts, and a software part for image processing, data analysis and control logic.

[0115] The working principle of the trial frame provided by the present disclosure can be as follows: multiple cameras 411 simultaneously capture images of the wearer's eyes from different angles, and the image data is transmitted to the control system for processing. The control system analyzes the pupil center position of each eye using image processing algorithms (such as edge detection, template matching, etc.), and calculates the distance between the pupil centers of the two eyes (i.e., the interpupillary distance). Based on the measurement results of the interpupillary distance and the visual axis offset, the control system calculates the amount of position adjustment needed. For example, if it is found that the optical center of a test lens on one side is offset relative to the visual axis, the control system will calculate the corresponding length change amount of the telescopic rod 1222. The control system converts the calculated adjustment amount into specific control instructions and sends them to the position adjustment assembly 12. For example, increase or decrease the length of a specific telescopic rod 1222 to adjust the position of the test lens. The position adjustment assembly 12 makes the corresponding adjustment according to the received control instructions. The electric cylinder group 1223 drives the telescopic rod 1222 to make precise length changes in combination with the angle sensor 51 and the position sensor 50, and the universal joint provides multi-directional flexibility, ensuring that the test lens can be accurately moved and rotated in three-dimensional space. After the adjustment is completed, the control system can start the interpupillary distance detection mechanism 40 again to recapture the images of the wearer's eyes to verify the adjustment effect. If further fine-tuning is needed, the control system can repeat the above steps until the best visual effect is achieved. Then, the wearer can try the visual effect in different visual directions to check if there is any blur or other discomfort. Finally, according to the feedback of the wearer, the control system can make the last fine-tuning to ensure that the wearer obtains the most comfortable visual experience.

[0116] As Figures 1 to 6 shown, the present disclosure also provides a vision detection method based on the above-mentioned trial frame, comprising the following steps:

[0117] Step one: use the interpupillary distance detection mechanism 40 to capture and collect images of the wearer's eyes in real time, and calculate the distance between the pupil centers of the two eyes, i.e., the interpupillary distance, through image processing algorithms in the control system;

[0118] Step two: based on the measurement results provided by the interpupillary distance detection mechanism 40 and the visual axis offset, the control system calculates the amount of position adjustment needed and converts it into control instructions to send to the position adjustment assembly 12;

[0119] Step three: the control system adjusts the position of the insert assembly 13 through the position adjustment assembly 12, and monitors the position of the insert assembly 13 in real time through the position sensor 50 and the angle sensor 51 to ensure that the optical center of the test lens on the insert assembly 13 is always aligned with the corresponding visual axis;

[0120] Step four: after the adjustment is completed, the control system starts the pupil distance detection mechanism 40 again to recapture the image of the wearer's eyes to verify the adjustment effect;

[0121] Step five: according to the feedback of the wearer and the analysis result of the control system, steps one to four are repeated for multiple iterations of optimization until the optical center of the test lens on the insert assembly 13 is always aligned with the corresponding visual axis.

[0122] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection range of the present disclosure.

[0123] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0124] In addition, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as disclosed by the present disclosure.

Claims

1. A trial glasses frame, characterized in that: It includes two lens holding mechanisms (10), a nose bridge (20), a wearing component (30), and a pupil distance detection mechanism (40); Each of the lens holding mechanisms (10) comprises a frame body (11), a position adjustment component (12) and an inserting component (13), wherein the two frame bodies (11) are spaced apart in the horizontal direction and connected via the nose bridge (20), one end of the position adjustment component (12) is connected to the frame body (11), and the inserting component (13) is detachably connected to the other end of the position adjustment component (12), and the inserting component (13) is used for receiving and inserting a test lens, and the position adjustment component (12) is configured to be able to adjust the displacement of the inserting component (13) in the horizontal and vertical directions and to rotate around the horizontal axis according to the measurement result of the pupil distance detection mechanism (40) combined with the visual axis offset, so that the optical center of the test lens on the inserting component (13) is aligned with the visual axis of the wearer's eyeball; The wearing assembly (30) comprises two temples, and the two temples are respectively arranged on the outward-facing sides of two mirror frames (11); The pupil distance detection mechanism (40) comprises two image acquisition components (41), and the two image acquisition components (41) are respectively arranged on the corresponding lens frame (11); The lens holding mechanism (10) further includes a first adsorption member (14); the position adjustment assembly (12) includes a motion platform (121) and a parallel motion chain assembly (122); and the insert assembly (13) includes a graduated disk (131) and a fixing member (132); The frame body (11) has a first surface and a second surface opposite to each other, a first through hole (111) penetrating the frame body (11) is formed in the middle of the frame body (11), the first surface is used to fit the wearer's eyes, and the first through hole (111) is used for the wearer's eyes to pass through; The parallel kinematic chain assembly (122) comprises three parallel kinematic chain groups, the three parallel kinematic chain groups being arranged trisymmetrically along the circumference of the frame body (11), each parallel kinematic chain group comprising two kinematic chains (1221), one end of each kinematic chain (1221) being movably connected to the second surface, and the other end of each kinematic chain (1221) being movably connected to the motion platform (121); A second through hole (123) is formed in the middle of the motion platform (121) and passes through the motion platform (121); a third through hole (133) is formed in the middle of the indexing plate (131) and passes through the indexing plate (131); an axial position scale extending along the circumference of the third through hole (133) is provided on the indexing plate (131); the first adsorption member (14) is mounted on the indexing plate (131); the indexing plate (131) can be detachably connected to a side of the motion platform (121) away from the parallel motion chain assembly (122) through the first adsorption member (14), so that the central axis of the second through hole (123) can coincide with the central axis of the third through hole (133); The fixing member (132) is arranged on the indexing plate (131), and the fixing member (132) is used to fix the test lens.

2. The trial glasses frame according to claim 1, wherein: The trial lens frame further comprises a position sensor (50) and an angle sensor (51); the position adjustment assembly (12) further comprises a first universal joint (124) and a second universal joint (125); and the motion chain (1221) comprises a telescopic rod (1222) and an electric cylinder assembly (1223); The telescopic rod (1222) comprises a first tube section (12221) and a second tube section (12222) sleeved on the first tube section (12221); the first tube section (12221) is slidably connected to the second tube section (12222); an end of the second tube section (12222) away from the first tube section (12221) is movably connected to the mirror frame (11) via the first universal joint (124); and an end of the first tube section (12221) away from the second tube section (12222) is movably connected to the motion platform (121) via the second universal joint (125); The electric cylinder group (1223) is arranged on an outer side wall of one end of the second pipe section (12222) close to the mirror frame (11), and the driving end of the electric cylinder group (1223) is transmission-connected to the first pipe section (12221) so that the first pipe section (12221) can move within the second pipe section (12222); The position sensor (50) is arranged on the first pipe section (12221) to detect a position change of the first pipe section (12221) relative to the second pipe section (12222); The angle sensor (51) is arranged on the motion platform (121) and is used to detect the rotation angle or movement distance of the motion platform (121) relative to the mirror frame (11); The number of the first universal joints (124), the number of the second universal joints (125), the number of the position sensors (50), the number of the electric cylinder groups (1223), and the number of the telescopic rods (1222) correspond one to one.

3. The trial glasses frame according to claim 2, characterized in that The lens holding mechanism (10) further comprises two first mounting seats (15) and two second mounting seats (16) disposed oppositely, the position adjustment assembly (12) further comprises two first connecting seats (126) and two second connecting seats (127) disposed oppositely, the first universal joint (124) comprises a first connecting block (1241), a first rotating shaft (1242) and a second rotating shaft (1243), and the second universal joint (125) comprises a second connecting block (1251), a first rotating shaft (1252) and a second rotating shaft (1253); The two first mounting seats (15) are both arranged on the mirror frame (11), the two second mounting seats (16) are both arranged on the motion platform (121), the two first connecting seats (126) are both arranged on an end of the second pipe section (12222) away from the first pipe section (12221), and the two second connecting seats (127) are both arranged on an end of the first pipe section (12221) away from the second pipe section (12222); A first connecting hole and a second connecting hole are formed on the first connecting block (1241), the first connecting hole penetrating the first connecting block (1241) along the axial direction of the first connecting block (1241), and the second connecting hole penetrating the first connecting block (1241) along the radial direction of the first connecting block (1241), so that the first connecting hole and the second connecting hole are arranged at a vertical angle; The first rotating shaft (1242) is passed through the first connecting hole, and both ends of the first rotating shaft (1242) are respectively connected to the two first mounting seats (15); The second rotating shaft (1243) is passed through the second connecting hole, and both ends of the second rotating shaft (1243) are respectively connected to the two first connecting seats (126); A first through hole and a second through hole are formed on the second connecting block (1251), the first through hole penetrating the second connecting block (1251) along the axial direction of the second connecting block (1251), and the second through hole penetrating the second connecting block (1251) along the radial direction of the second connecting block (1251), so that the first through hole and the second through hole are arranged at a vertical angle; The first rotating shaft (1252) is passed through the first through hole, and both ends of the first rotating shaft (1252) are respectively connected to the two second mounting seats (16); The second rotating shaft (1253) is passed through the second through hole, and both ends of the second rotating shaft (1253) are respectively connected to the two second connecting seats (127).

4. The trial frame according to any one of claims 1 to 3, characterized in that The lens holding mechanism (10) further includes a first magnetic portion; The first adsorption member (14) is constructed as a magnet, a mounting cavity (128) is formed on the motion platform (121), one end of the mounting cavity (128) is set as an open end, and the other end is set as a closed end, and the first magnetic part is connected to the mounting cavity (128); One end of the first adsorption member (14) away from the indexing plate (131) is inserted into the installation cavity (128) through the open end and is attracted to the first magnetic part; There are multiple first adsorption members (14), and the multiple first adsorption members (14) are arranged at intervals along the circumference of the indexing plate (131). The number of the mounting cavities (128), the number of the magnetic parts, and the number of the first adsorption members (14) correspond one to one.

5. The trial frame according to any one of claims 1 to 3, characterized in that The fixing member (132) includes a first fixing portion (1321) and a second fixing portion (1322), and the insert assembly (13) further includes a second adsorption member (134); The first fixing portion (1321) is arranged on a side of the indexing plate (131) facing away from the first adsorption member (14), and the second fixing portion (1322) is rotatably connected to a side of the indexing plate (131) facing away from the first adsorption member (14) and has a closed position close to the first fixing portion (1321) and an open position away from the first fixing portion (1321); The second adsorption member (134) is mounted on the indexing plate (131), and the second adsorption member (134) is used to adsorb and fix the second fixing portion (1322) to the indexing plate (131) when the second fixing portion (1322) is in the closed position; The first fixing portion (1321) is formed with a first card slot (1323) capable of clamping the test lens, and the second fixing portion (1322) is formed with a second card slot (1324) capable of clamping the test lens; In the closed position, the first card slot (1323) and the second card slot (1324) are arranged relative to each other in the up-down direction; There are multiple first card slots (1323), and the multiple first card slots (1323) are spaced apart along the length direction of the first fixing portion (1321) and constitute a first card slot (1323) group; There are a plurality of second card slots (1324), and a plurality of first card slots (1323) are arranged at intervals along the length direction of the first fixing portion (1321) to form a first card slot (1323) group.

6. The trial glasses frame according to claim 5, characterized in that The second adsorption member (134) comprises a magnetic adsorption member; The second fixing portion (1322) is made of a magnetic material so that the second fixing portion (1322) can be attracted to the magnetic adsorption component; or a second magnetic portion (135) is provided on a side of the second fixing portion (1322) close to the second slot (1324), and the second magnetic portion (135) can be attracted to the magnetic adsorption component.

7. The trial frame according to any one of claims 1 to 3, characterized in that The image acquisition component (41) includes a plurality of cameras (411); The plurality of cameras (411) are arranged on a side of the motion platform (121) facing the frame body (11), the plurality of cameras (411) are arranged at intervals along the circumference of the second through hole (123), and each of the cameras (411) is used to capture an image of the wearer's eyes.

8. The trial glasses frame according to claim 7, characterized in that The trial lens frame also includes a control system; The position adjustment component (12) and the pupil distance detection mechanism (40) are both electrically connected to the control system.

9. A method for visual acuity detection, characterized in that: The trial spectacles frame according to any one of claims 1 to 8 comprises the following steps: Step 1: using the pupil distance detection mechanism (40) to capture and collect images of the wearer's eyes in real time, and calculating the distance between the pupil centers of the two eyes, i.e., the pupil distance, through the image processing algorithm in the control system; Step 2: Based on the measurement result provided by the pupil distance detection mechanism (40) and the visual axis offset, the control system calculates the required position adjustment amount and converts it into a control instruction and sends it to the position adjustment component (12); Step 3: The control system adjusts the position of the inserting assembly (13) through the position adjustment assembly (12), and monitors the position of the inserting assembly (13) in real time through the position sensor (50) and the angle sensor (51), so as to ensure that the optical center of the test lens on the inserting assembly (13) is always aligned with the corresponding visual axis; Step 4: After the adjustment is completed, the control system starts the pupil distance detection mechanism (40) again to recapture the image of the wearer's eyes to verify the adjustment effect; Step 5: Repeat steps 1 to 4 according to the wearer's feedback and the analysis results of the control system, and perform multiple iterative optimizations until the optical center of the test lens on the insert assembly (13) is always aligned with the corresponding visual axis.

Images