Multifunctional portable nystagmus view instrument based on virtual reality

Abstract

The utility model discloses a multifunctional portable nystagmus view instrument based on virtual reality, and the instrument comprises a housing which is provided with a wearing end at the rear side and a view end at the front side; the adjustable head band is detachably connected with the wearing end of the shell; the two otoscopes are arranged on the two sides of the adjustable head band respectively; the two dichroic mirrors are vertically and rotatably arranged in the shell; the two camera assemblies are arranged on the two sides of the shell respectively, and cameras of the camera assemblies are arranged in the shell in an angle-adjustable mode and correspond to the dichroic mirrors; the distance between the visual target assembly and the eyeball is adjustable, and the visual target assembly is arranged on a window at the visual field end of the shell; the external display interaction equipment is arranged on the outer side of the visual target assembly; wherein the otoscope, the camera assembly and the visual target assembly are respectively connected with corresponding terminals of the external display interaction equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of nystagmus imaging instruments, in particular to a multifunctional portable nystagmus imaging instrument based on virtual reality. Background Art

[0002] A nystagmus meter is a device used to detect and analyze eye movements. It is a basic examination device for distinguishing peripheral from central vertigo and is the most critical part of a balance examination. It is widely used in otolaryngology, neurology, rehabilitation, geriatrics, vertigo diagnosis and treatment centers and other fields. Traditional nystagmus meters are limited in their wide application in clinical and scientific research due to their large size and footprint, complex operation, high price, and restrictions on the use environment. To address these problems, various portable nystagmus examination devices have appeared on the market. However, due to the limitations of technology and examination principles, these portable nystagmus examination devices have more or less some shortcomings, and their shortcomings are mainly concentrated in the following points:

[0003] 1. Single examination function, such as only being able to examine spontaneous nystagmus in a dark-vision environment or a single auxiliary examination for BPPV symptoms, while the routine examination function of a true nystagmus image examination instrument includes 8 tests: spontaneous nystagmus test, gaze test, smooth pursuit test, saccade test, optokinetic nystagmus test, dynamic position test, static position test and temperature test; 2. No calibration function, that is, the subject cannot be calibrated before the examination, which will affect the software's recognition rate of nystagmus and the authenticity of nystagmus to a certain extent; 3. No built-in visual target or the distance between the built-in visual target and the subject's eyes does not meet the examination requirements and cannot be adjusted; 4. Non-full-field stimulation, the built-in visual target has a limited stimulation range, which affects the accuracy of calibration and the induction of nystagmus. Full-field stimulation can open the subject's visual angle wider, without visual blind spots, and directly stimulate the subject's entire retina, making it easier to induce nystagmus; 5. Photography The camera sampling rate is low, and the focal length and angle of the camera cannot be adjusted; the camera is non-detachable and cannot be removed and replaced, which will increase the time cost of maintenance; 6. There is no matching electronic otoscope. Before the temperature test of the nystagmus view, the patient's external auditory canal and middle ear must be checked, and the examination results must be automatically saved to the patient's electronic medical record of the nystagmus view examination for subsequent follow-up visits; 7. The test results cannot be analyzed directly on the instrument. The nystagmus video collected by the instrument needs to be copied to another computer workstation for analysis, which will increase the doctor's examination time; 8. The analyzed nystagmus parameters are not comprehensive. The analysis of conventional nystagmus parameters includes: intensity, direction, number, frequency and duration, etc.; 9. The instrument itself is heavy, which increases the discomfort of the subject wearing it. When doing position tests, the patient needs to wear the instrument and do actions such as hanging the head and turning the neck. The instrument is prone to displacement under the action of its own weight, resulting in inaccurate collected data. 10. The head fixing strap cannot be easily removed and put on, the tightness cannot be adjusted, and it is easy to loosen.

[0004] Therefore, a multifunctional portable nystagmus imager based on virtual reality is proposed. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a multifunctional portable nystagmus imager based on virtual reality.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present utility model is as follows:

[0007] A multifunctional portable nystagmography device based on virtual reality, comprising:

[0008] The housing has a rear side for wearing and a front side for viewing;

[0009] An adjustable headband, detachably connected to the wearing end of the shell;

[0010] Two otoscopes, one on each side of the adjustable headband;

[0011] Two dichroic mirrors are vertically and rotatably arranged in the housing;

[0012] Two camera assemblies are respectively arranged on both sides of the housing, and the camera angles thereof are adjustable and arranged inside the housing, and correspond to the dichroic mirrors;

[0013] A sight target assembly with an adjustable distance from the eyeball is provided on a viewing window at the visual field end of the housing;

[0014] External display interaction equipment, arranged outside the visual target assembly;

[0015] Among them, the otoscope, camera assembly and visual target assembly are respectively connected to the corresponding terminals of the external display interactive device.

[0016] The adjustable headband comprises:

[0017] The base has a groove on its rear side, and a limit back plate is buckled on the groove;

[0018] The shaft column is vertically arranged in the groove, and the return spring and the gear shaft are installed on it in sequence;

[0019] The adjusting knob is arranged on the outer wall of the limit back plate, and its main shaft passes through the thin wall of the limit back plate and is connected to the gear shaft;

[0020] The left anti-slip headband has an adjustment end at one end and a connection end at the other end. The adjustment end is provided with an adjustment square hole, and a lower rack is provided on the side wall below the adjustment square hole.

[0021] The right anti-slip headband has an adjustment end at one end and a connection end at the other end. The adjustment end is also provided with an adjustment square hole, and an upper rack is provided on the side wall above the adjustment square hole.

[0022] The adjustment ends of the left and right anti-slip headbands are overlapped and arranged in the groove, and the upper and lower racks are respectively engaged with the gear ring on the outer wall of the gear shaft, so that when the gear shaft rotates, the left and right anti-slip headbands can be pushed;

[0023] The connecting ends of the left anti-slip headband and the right anti-slip headband are connected to the two sides of the shell through adjustable and detachable buckles.

[0024] A base buffer cotton is provided on the front side of the base; a two-color mirror rotating shaft seat is provided at the bottom of the two-color mirror, the two-color mirror rotating shaft seat is provided on the rotating shaft seat base, and the rotating shaft seat base is provided in the shell; a fitting mask is provided on the wearing end of the shell.

[0025] Two sliding bar holes are provided on the adjustment ends of the left anti-slip headband and the right anti-slip headband, and the two sliding bar holes are respectively corresponding to the left upper limit pin and the right lower limit pin on the rear side wall of the base.

[0026] The buckle comprises:

[0027] A connecting plate, the front end of which is hinged to the outer wall of the shell;

[0028] The card board has card slots on its upper and lower sides, and the card board is plugged into the connecting plate through the card slots;

[0029] Wherein, both the connecting plate and the clamping plate are provided with mounting strip holes and are connected to each other by bolts.

[0030] The utility model also includes:

[0031] The battery is disposed in a battery compartment in the base, and an inlet of the battery compartment is disposed at the bottom of the base;

[0032] The bottom cover of the battery compartment snaps onto the entrance of the battery compartment;

[0033] The upper headband is arranged on the upper part of the base, one end of which is plugged into the plug interface on the top of the base, and the other end is fixed to the shell through the upper headband fixing strip;

[0034] Among them, a wire is provided in the upper headband, one end of the wire is connected to the battery, and the other end is connected to the otoscope, camera assembly and visual target assembly and the power-consuming part of the external display interactive device respectively.

[0035] The otoscope comprises:

[0036] primary mirror cavity housing;

[0037] The first light-transmitting cover and the second light-transmitting cover are respectively arranged on the mounting holes on both sides of the main mirror cavity housing;

[0038] A magnifying mirror is arranged on the mounting hole at the front end of the main mirror cavity housing;

[0039] An LED light ring is arranged on the mounting hole at the rear end of the main mirror cavity housing, and a number of LED lighting lamps are evenly distributed on it;

[0040] The in-ear conical head shell is mounted on the rear end of the main mirror cavity shell;

[0041] The light-controlled switch is arranged on the side wall of the in-ear cone head shell and is connected in series to the power supply circuit of the LED lighting;

[0042] A light blocking device is provided on the air-avoidance hole on the side wall of the in-ear cone head shell;

[0043] Track camera, set in the in-ear cone head shell;

[0044] The hand-activated roller a is arranged on a mounting hole on the side wall of the in-ear cone head housing and meshes with a rack vertically arranged on the track camera, so that when the hand-activated roller a is rotated, the track camera can be driven to move up and down;

[0045] The flexible cable has one end connected to the signal output terminal and power supply circuit of the track camera, and the other end connected to the external display interaction device and battery.

[0046] The camera assembly comprises:

[0047] The three threaded holes on the outer wall of the housing A are respectively provided with a focus adjustment knob, a horizontal angle adjustment knob, and a vertical angle adjustment knob;

[0048] A support frame is provided in the housing A;

[0049] The support platform is arranged on the support frame, and the cylindrical protruding rod on the support platform is inserted into the circular hole at the center of the support frame;

[0050] The camera module mainboard is snapped onto the support platform;

[0051] The module mainboard base is plugged into the camera module mainboard;

[0052] The filter is set on the center hole on the base of the module mainboard;

[0053] The lens base is plugged into the module mainboard base, and the inner dust and aperture ring on it is assembled into the outer dust and aperture ring in the center of the module mainboard base. At the same time, the two ends of the lens base are connected to the two ends of the support frame;

[0054] The LED light circuit board has one side corresponding to the lens base, and the other side is pressed against the center hole of the shell B by an adjustable spring. The cable terminals on it are connected to the cable of the camera module mainboard. The shell B and shell A are buckled together to form a box body;

[0055] The lens is set on the center hole of the shell B, and passes through the center hole of the shell B, the adjustment spring and the center hole of the LED lamp circuit board in sequence, and is threadedly installed on the lens base;

[0056] Infrared fill light A, infrared fill light B and fixation suppression light are arranged on the outer wall of the housing B and are respectively connected to the LED light circuit board;

[0057] One end of the cable passes through the housing B and connects to the camera module mainboard, while the other end connects to the external display interactive device and the battery respectively;

[0058] Among them, the focal length adjustment knob, the horizontal angle adjustment knob and the vertical angle adjustment knob are all provided with limit springs; the focal length adjustment knob passes through the circular hole at the center of the support frame and is pressed against the corresponding conical arc groove on the cylindrical protrusion of the support platform; the end of the horizontal angle adjustment knob is pressed against the horizontal edge of the support frame; the end of the vertical angle adjustment knob is pressed against the vertical edge of the support frame.

[0059] The sight target assembly comprises:

[0060] A display module, wherein a first thrust cam is rotatably disposed inside the display module;

[0061] Lens group A and lens group B are arranged on the viewing window inside the display module and are located on both sides of the first thrust cam. At the same time, distance sensors A and B are respectively installed on them, and the signal output ends of distance sensors A and B are connected to the external display interaction device;

[0062] The hand-operated roller b is rotatably mounted on the side wall of the housing at the viewing end through a damping pad and a roller positioning screw;

[0063] The driven gear is rotatably mounted on the side wall of the housing at the viewing end and meshes with the teeth on the hand-operated roller b;

[0064] The second thrust cam is installed at the center of the driven gear, and when the driven gear rotates, it can drive the second thrust cam to rotate together;

[0065] Among them, the inner side of the display module corresponds to the field of view end of the shell, and the two sides of the display module are respectively connected to the two high platform nut columns on the field of view end of the shell through the module limit screws A and module limit screws B and the module telescopic springs A and module telescopic springs B respectively mounted on the module limit screws A and module limit screws B. At this time, the first thrust cam and the second thrust cam are in corresponding contact with each other.

[0066] The external display interaction device includes:

[0067] The outer shell is buckled with the shell to form a box body;

[0068] The main control board of the whole machine is arranged in the outer shell;

[0069] A flexible screen flip bracket is flippably arranged on the front side wall of the outer shell;

[0070] The flexible screen is mounted on a flexible screen flip bracket and is connected to the main control board of the whole device via a signal cable;

[0071] Among them, the outer wall of the outer shell is equipped with a speaker, volume button, power indicator light guide column, power button and charging indicator light guide column, and they are all connected to the main control board of the whole machine.

[0072] The beneficial effects of the utility model are:

[0073] 1. A visual target was designed on the portable nystagmus meter, and virtual reality technology was used to achieve full-field stimulation of the visual target on the portable nystagmus meter;

[0074] 2. The physical distance between the visual target and the subject's eyes can be quantitatively adjusted, and the virtual image equivalent distance can be calculated in real time based on the change in physical distance. A standard value for the virtual image equivalent distance corresponding to the physical distance between the visual target and the subject's eyes, calculated under ideal conditions, is provided to calibrate and verify the adjusted distance value to prevent large errors caused by incorrect instrument wearing or other subjective and objective reasons, ensuring that the distance between the visual target and the subject's eyes meets the range required for nystagmus imaging examinations.

[0075] 2. Make the focal length and angle of the camera acquisition device on the portable nystagmography device adjustable and detachable;

[0076] 3. The portable nystagmus meter can realize the routine examination functions of the traditional nystagmus meter;

[0077] 4. Equipped with a dual-working mode electronic otoscope, the ear canal and eardrum can be viewed directly through the magnifying glass on the electronic otoscope, or the ear canal image can be captured by the camera and viewed on the instrument screen;

[0078] 5. The test results of the nystagmus image can be analyzed directly on the instrument, without the need to copy or transfer the collected nystagmus video images to a computer workstation for analysis. It can also comprehensively analyze the intensity, direction, number, frequency, duration and other conventional nystagmus parameters and special nystagmus parameters for the test items;

[0079] 6. The battery is installed at the rear of the instrument and connected to the main control board through hidden wires on the upper headband, which can increase the balance of the weight distribution of the whole device and improve the wearing comfort of the subjects; the main display screen uses a flexible screen with a flip bracket to reduce the weight of the whole device, and the flip screen can be easily viewed by the doctor;

[0080] 7. The head-fixing strap device of the present invention solves the problem of tightness and comfort when patients wear a portable nystagmus meter during a nystagmus exam. The device allows for quick and easy donning, tightness adjustment, removal, and positioning of the portable nystagmus meter. Its simple operation facilitates medical staff's operation, saves examination time, and does not pull the patient's hair when removed. The device has a large base area and is equipped with base cushioning cotton to reduce head pressure and improve wearer comfort. The device is connected to the portable nystagmus meter using a snap-on pull-out method, making installation and removal very convenient and widely applicable to similar products.

[0081] 8. The video capture portion of the present invention can effectively solve the problem of either the focus or the angle of the video capture device being unable to be adjusted, or both the focus and the angle of the video capture device being unable to be adjusted, during nystagmus imaging examinations. Its operating principle is as follows: the entire camera module and lens are designed as a whole, an adjustment spring is installed at the front end, and an adjustment knob is installed at the rear end. Adjustment of the adjustment knob causes the front end spring to contract, expand, and rebound, thereby achieving vertical forward and backward movement (focal length adjustment) and unilateral forward and backward movement (angle adjustment) of the entire camera, thereby achieving focal length and angle adjustment of the camera (video capture device). The video acquisition device of the present invention can realize that the positions of the infrared fill light and the fixation suppression light remain constant when the focus or angle of the camera is adjusted, that is, the infrared fill light and the fixation suppression light do not change with the adjustment of the focus or angle of the camera, thus ensuring that the light spot of the fixation suppression light is always located in front of the patient's field of view, and can truly achieve the effect of fixation suppression for nystagmus that requires fixation suppression; in addition, the position of the infrared fill light is constant, which can ensure that a fixed area of ​​the patient's eye position is illuminated in a dark visual environment. This fixed area is the best area for the software to recognize the patient's eyes, and is also the best area for the doctor to observe the patient's eye movements, thus ensuring that the camera The nystagmus collected and recorded by the camera is clear and real; the video acquisition device of the utility model can conveniently and quickly adjust the focus and angle of the video acquisition device. A focus adjustment knob, a vertical angle adjustment knob and a horizontal angle adjustment knob are designed at a conspicuous position on the video acquisition device shell. The focus or angle can be adjusted by gently turning the knob. The adjustment effect can be synchronously displayed in real time on the display screen connected to the camera. During the entire adjustment process, the patient will not feel it, the patient's body will not be touched, and there is no need to repeatedly take off and put on the nystagmus imager or the light shield (hood), which will not cause tension or anxiety to the patient.

[0082] 9. The visual target of the present invention partially solves the problem that the visual target of the portable nystagmus imaging instrument cannot achieve full-field stimulation and the distance between the visual target and the subject's eyes is too close to meet the prescribed distance range. By using virtual reality technology to replace the traditional visual target, the virtual visual target is used to achieve full-field stimulation while ensuring that the virtual image equivalent distance meets the distance requirements of the nystagmus imaging examination. This ensures that the visual target can stimulate the entire field of view and the distance between the visual target and the subject's eyes meets the prescribed range in the narrow space inside the portable nystagmus imaging instrument, making the visual target calibration and the presented stimulation content effective and credible to the subject. The convenience and speed of nystagmus examination are greatly improved; at the same time, the problem of fixed and unadjustable target position of portable nystagmus meter is solved. A composite linkage device is composed of a roller linkage device, a cam bidirectional spiral push angle, a high platform nut column and a telescopic spring, which can manually and quantitatively adjust the horizontal forward and backward movement of the display module (target), and use the damping principle to limit the adjusted distance. This can effectively solve the change of the virtual distance from the target to the eye caused by factors such as the examinee's head shape, forehead width, facial flatness, eye convexity and wearing of the portable nystagmus meter in near-eye display. The problem of large amplitude; the target part of the utility model is designed with a distance sensor on the lens group of the display module viewing window, which can measure the distance from the target assembly 3 to the eye, and can display the physical distance from the target to the eye and the virtual image equivalent distance converted by the system in real time. When the target assembly 3 is adjusted to move, the displayed physical distance value and the virtual image equivalent distance value will also change accordingly in real time; and the utility model designs a standard value of the virtual image equivalent distance corresponding to the simulated calculation of the physical distance under ideal conditions as a reference, which is used to calibrate and verify the adjusted distance value, because in actual use Due to factors such as how the instrument is worn, the distance value adjusted by the user may deviate from the actual distance adjusted for correct wear. When the deviation is within a reasonable range, it can be considered a valid value. When the deviation is large, it should be considered that the portable nystagmus analyzer is not worn properly or has malfunctioned. This design ensures that the distance from the target to the subject's eyes is true and valid when using the portable nystagmus analyzer for examinations. It can largely avoid unreasonable deviations in the distance from the target to the subject's eyes caused by human wear or other objective reasons, and can improve the accuracy and reliability of the examination results. The horizontal distance adjustment of the target uses a dual-screw push angle to control the forward and backward movement of the target. The contact area between the two screw push angles is large, the force-bearing area is large, and they are always in a spiral linkage state, which can ensure the stability of the target during movement.

[0083] 10. The dual-working mode electronic otoscope of the present invention partially solves the problem that the advantages of traditional electronic otoscopes and video electronic otoscopes cannot be used compatibly in nystagmus examinations. A dual-working mode electronic otoscope that is compatible with hardware and software is designed on a portable nystagmus monitor, which can quickly switch between traditional electronic otoscopes and video electronic otoscopes; it uses the principle of arc track, roller and push rod linkage to push out and retract the camera part of the video electronic otoscope. The user only needs to turn the roller on the outside of the shell to achieve this operation, which is convenient and quick. The mirror cavity part and the in-ear conical head part use gold finger pins and contact holes to conduct and connect circuits and signals, eliminating the need for wiring in a small space, making the entire structure simple and practical; and the in-ear conical head part adopts a split design, which is convenient for the assembly and maintenance of the video electronic otoscope camera part; the traditional electronic otoscope part is designed with a lighting lamp, a facing light-transmitting cover, and a magnifying glass on the top, which can greatly improve the clarity of observation while preventing dust from entering; the lighting lamp of the traditional electronic otoscope part is installed on an integrated light ring, which is convenient for replacement and adjustment of the illumination angle, and the lighting lamp is designed with a control switch, which can be turned off when not in use or after use, saving power of the host; the video electronic otoscope part can transmit the collected video of the external auditory canal and eardrum to the instrument host in real time, and display the video image of the eardrum and external auditory canal on the flexible screen 13 in real time, and the camera can be controlled on the flexible screen 13 to take pictures or record videos of the external auditory canal or eardrum, and the system will automatically save the taken photos or recorded videos to the ID of the current test patient.

[0084] 11. The present invention can implement the routine inspection functions of a traditional nystagmus analyzer on a portable nystagmus analyzer. The nystagmus test results can be analyzed directly on the instrument without copying or transferring the collected nystagmus video images to a computer workstation for analysis. The instrument can also comprehensively analyze conventional nystagmus parameters such as nystagmus intensity, direction, amount, frequency, and duration, as well as special nystagmus parameters for the test items. The present invention installs the battery at the rear of the instrument and connects it to the main control board via hidden wires in the upper headband, which can increase the balance of the overall weight distribution and improve the wearing comfort of the subjects. The main display screen uses a flexible screen that fits on a flip bracket, which can reduce the weight of the entire device, and the flip screen allows the doctor to view it from a suitable angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0086] Figure 1 It is an exploded view of the utility model;

[0087] Figure 2 This is a schematic structural diagram of the adjustable headband of the present invention;

[0088] Figure 3It is an exploded view of the adjustable headband of the present invention;

[0089] Figure 4 It is an exploded view of the camera assembly of the present utility model;

[0090] Figure 5 It is a three-dimensional diagram of the camera assembly of the present utility model;

[0091] Figure 6 It is a three-dimensional diagram of the sight target assembly of the utility model;

[0092] Figure 7 It is an exploded view of the sight target assembly of the utility model;

[0093] Figure 8 It is a three-dimensional diagram of the display module of the present utility model;

[0094] Figure 9 This is a connection diagram of the second thrust cam of the utility model;

[0095] Figure 10 It is a stereoscopic diagram of the otoscope of the present invention;

[0096] Figure 11 It is an exploded view of the otoscope of the present invention;

[0097] Figure 12 It is a working principle diagram of the utility model;

[0098] Figure 13 It is a schematic diagram of a model of the present utility model;

[0099] Figure 14 It is a schematic diagram of the model principle of the present utility model. DETAILED DESCRIPTION

[0100] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0101] like Figure 1As shown, a multifunctional portable nystagmography device based on virtual reality includes: a shell 8, the rear side of which is a wearing end and the front side is a field of view end; an adjustable headband 1, detachably connected to the wearing end of the shell 8; two otoscopes 2, respectively arranged on both sides of the adjustable headband 1; two dichroic mirrors 6, vertically and rotatably arranged in the shell 8; two camera assemblies 3, respectively arranged on both sides of the shell 8, with adjustable camera angles arranged in the shell 8 and corresponding to the dichroic mirrors 6; a target assembly 14 with an adjustable distance from the eyeball, arranged on the window at the field of view end of the shell 8; an external display interaction device, arranged on the outside of the target assembly 14; wherein the otoscope 2, the camera assembly 3 and the target assembly 14 are respectively connected to corresponding terminals of the external display interaction device.

[0102] like Figure 2 and Figure 3 As shown, the adjustable headband 1 includes: a base 106, a groove is provided on the rear side of which, and a limit back plate 113 is buckled on the groove; an axis column 112 is vertically arranged in the groove, and a return spring 109 and a gear shaft 108 are installed on it in sequence; an adjustment knob 103 is provided on the outer wall of the limit back plate 113, and its main shaft passes through the thin wall of the limit back plate 113 and is connected to the gear shaft 108; a left anti-slip headband 101, one end of which is an adjustment end and the other end is a connecting end, an adjustment square hole is provided on the adjustment end, and a lower rack is provided on the side wall below the adjustment square hole; a right anti-slip headband 102 One end of the strap is an adjustment end, and the other end is a connecting end. An adjustment square hole is also provided on the adjustment end, and an upper rack is provided on the upper side wall of the adjustment square hole; wherein, the adjustment ends of the left anti-slip headband 101 and the right anti-slip headband 102 are overlapped with each other and arranged in the groove, and the upper rack and the lower rack are respectively engaged with the outer wall gear ring of the gear shaft 108, so that when the gear shaft 108 rotates, the left anti-slip headband 101 and the right anti-slip headband 102 can be pushed; wherein, the connecting ends of the left anti-slip headband 101 and the right anti-slip headband 102 are connected to both sides of the shell 8 through adjustable and detachable buckles.

[0103] like Figures 1 to 3 As shown, a base buffer cotton 107 is provided on the front side of the base 106; a two-color mirror rotating shaft seat 5 is provided at the bottom of the two-color mirror 6, and the two-color mirror rotating shaft seat 5 is provided on the rotating shaft seat base 4, and the rotating shaft seat base 4 is provided in the shell 8; a fitting mask 9 is provided on the wearing end of the shell 8.

[0104] like Figure 3 As shown, two sliding bar holes are provided on the adjustment ends of the left anti-slip headband 101 and the right anti-slip headband 102, and the two sliding bar holes are respectively corresponding to the left upper limit pin 110 and the right lower limit pin 111 on the rear side wall of the base 106.

[0105] like Figure 3As shown, the buckle includes: a connecting plate 7, the front end of which is hinged on the outer wall of the shell 8; a card plate 20, the upper and lower sides of which are respectively provided with card slots 19, and the card plate 20 is plugged into the connecting plate 7 through the card slots 19; wherein, both the connecting plate 7 and the card plate 20 are provided with mounting strip holes 18, and are connected to each other by bolts 17.

[0106] like Figure 2 and Figure 3 As shown, the utility model also includes: a battery 115, which is arranged in a battery compartment in the base 106, and the entrance of the battery compartment is arranged at the bottom of the base 106; a battery compartment bottom cover 114, which is snapped onto the entrance of the battery compartment; an upper headband 104, which is arranged on the upper part of the base 106, one end of which is plugged into the plug interface at the top of the base 106, and the other end is fixed to the shell 8 through the upper headband fixing strip 105; wherein, a wire is provided in the upper headband 104, one end of the wire is connected to the battery 115, and the other end is respectively connected to the otoscope 2, the camera assembly 3 and the visual target assembly 14 and the power parts of the external display interactive device.

[0107] like Figure 10 and Figure 11 As shown, the otoscope 2 includes: a main mirror cavity shell 204; a first light-transmitting cover 202 and a second light-transmitting cover 203, which are respectively arranged on the mounting holes on both sides of the main mirror cavity shell 204; a magnifying glass 201, which is arranged on the mounting hole at the front end of the main mirror cavity shell 204; an LED light ring 205, which is arranged on the mounting hole at the rear end of the main mirror cavity shell 204, and has a plurality of LED lighting lamps 206 evenly distributed thereon; an in-ear cone head shell 211, which is mounted on the rear end of the main mirror cavity shell 204; a light control switch 209, which is arranged on the side wall of the in-ear cone head shell 211 and is connected in series to the power supply of the LED lighting lamp 206. On the electrical circuit; the light-shielding plug 210 is arranged on the air-avoidance hole on the side wall of the in-ear cone head shell 211; the track camera 208 is arranged in the in-ear cone head shell 211; the hand-activated roller a207 is arranged on the mounting hole on the side wall of the in-ear cone head shell 211, and is engaged with the rack vertically arranged on the track camera 208, so that when the hand-activated roller a207 is rotated, the track camera 208 can be driven to move up and down; a flexible cable 212, one end of which is respectively connected to the signal output end and the power supply circuit of the track camera 208, and the other end is connected to the external display interaction device and the battery 115.

[0108] like Figure 4 and Figure 5As shown, the camera assembly 3 includes: a housing A305, on the outer wall of which three threaded holes are respectively provided with a focus adjustment knob 301, a horizontal angle adjustment knob 302 and a vertical angle adjustment knob 303; a support frame 306, which is provided in the housing A305; a support platform 307, which is provided on the support frame 306, and the cylindrical protrusion on the support frame 307 is inserted into the circular hole at the center of the support frame 306; a camera module mainboard 308, which is clamped on the support platform 307; a module mainboard base 309, which is plugged into the camera module mainboard 308; a filter 310 , set on the center hole of the module mainboard base 309; the lens base 311 is plugged into the module mainboard base 309, and the inner dustproof and anti-aperture ring on it is assembled into the outer dustproof and anti-aperture ring in the center of the module mainboard base 309. At the same time, the two ends of the lens base 311 are connected to the two ends of the support frame 306; the LED light circuit board 312, one side corresponds to the lens base 311, and the other side is pressed on the center hole of the shell B315 through the adjustment spring 314, and the cable terminal on it is connected to the cable of the camera module mainboard 308, wherein the shell B31 5 is buckled with the housing A305 to form a box body; the lens 316 is set on the center hole of the housing B315, and passes through the center hole of the housing B315, the adjustment spring 314 and the center hole of the LED light circuit board 312 in sequence, and is screwed onto the lens base 311; the infrared fill light A317, the infrared fill light B318 and the fixation suppression light 319 are set on the outer wall of the housing B315, and are respectively connected to the LED light circuit board 312; one end of the cable 313 passes through the housing B315 and is connected to the camera module mainboard 308, and the other end One end is connected to the external display interactive device and the battery 115 respectively; wherein, the focus adjustment knob 301, the horizontal angle adjustment knob 302 and the vertical angle adjustment knob 303 are all provided with a limit spring 304; the focus adjustment knob 301 passes through the circular hole at the center of the support frame 306 and is pressed against the corresponding conical arc groove on the cylindrical protrusion of the support platform 307; the end of the horizontal angle adjustment knob 302 is pressed against the horizontal edge of the support frame 306; the end of the vertical angle adjustment knob 303 is pressed against the vertical edge of the support frame 306.

[0109] like Figures 6 to 9As shown, the sight target assembly 14 includes: a display module 1405, on the inner side of which a first thrust cam 1414 is rotatably arranged; a lens group A1410 and a lens group B1411 are arranged on the viewing window on the inner side of the display module 1405, and are respectively located on both sides of the first thrust cam 1414, and at the same time, a distance sensor A1412 and a distance sensor B1413 are respectively installed thereon, and the signal output ends of the distance sensor A1412 and the distance sensor B1413 are connected to the external display interaction device; a hand-operated roller b1401 is rotatably mounted on the side wall of the field of view end of the shell 8 through a damping pad 1403 and a roller positioning screw 1402; a driven gear 1404 is rotatably mounted on the side wall of the field of view end of the shell 8, and is connected to the hand-operated roller b1401. The teeth on the dial wheel b1401 are meshed with each other; the second thrust cam 1415 is installed at the center of the driven gear 1404, and when the driven gear 1404 rotates, it can drive the second thrust cam 1415 to rotate together; wherein, the inner side of the display module 1405 corresponds to the field of view end of the shell 8, and the two sides of the display module 1405 are respectively connected to the two high-platform nut columns 1416 on the field of view end of the shell 8 through the module limiting screws A1409 and the module limiting screws B1408 and the module telescopic springs A1406 and the module telescopic springs B1407 respectively mounted on the module limiting screws A1409 and the module limiting screws B1408. At this time, the first thrust cam 1414 and the second thrust cam 1415 are in contact with each other.

[0110] like Figure 1 As shown, the external display interactive device includes: an outer shell 16, which is buckled with the shell 8 to form a box body; a main control board 10 of the whole machine, which is arranged in the outer shell 16; a flexible screen flip bracket 12, which is flippably arranged on the front side wall of the outer shell 16; a flexible screen 13, which is arranged on the flexible screen flip bracket 12, and is connected to the main control board 10 of the whole machine through a signal cable; wherein, a speaker 11, a volume button, a power on indicator light guide column, a power button and a charging indicator light guide column are provided on the outer wall of the outer shell 16, and are all connected to the main control board 10 of the whole machine.

[0111] The working principle of the sight target assembly 3 is as follows:

[0112] ① Display module 1405 has two display screens, each corresponding to a viewing window. Lens group A 1410 and lens group B 1411 are mounted outside the viewing windows. The two display screens on display module 1405 are within the focal point of the corresponding lens groups. When calibration content or stimulation content is displayed or played on the screen, it is refracted by the lens groups to generate a magnified erect virtual image. After the content displayed on the screen is refracted by the optical system of the lens groups, the resulting virtual image has an imaging distance of between 0.5 and 2 meters, meaning that the virtual image is equivalently positioned between 0.5 and 2 meters from the subject's eye.

[0113] ② Distance measuring sensors A1412 and B1413 are installed in the center above lens group A1410 and lens group B1411. When the subject wears the portable nystagmography device and turns it on, distance measuring sensors A1412 and B1413 begin to work, and the flexible screen 13 of the portable nystagmography device can display the actual distance between the subject's eyes and the lens group and the virtual image equivalent distance converted by the system;

[0114] ③ When the displayed virtual image equivalent distance is not within the specified distance range from the eye to the visual target (exceeds or is less than), the distance from the visual target assembly 3 to the subject's eye can be manually adjusted to meet the specified required range; the specific adjustment principle and method are as follows:

[0115] A. The manual dial roller b1401 and its linked driven gear 1404 are aligned during assembly. After this alignment, the helical angle of the second thrust cam 1415 and the helical angle of the first thrust cam 1414, which are assembled as required, are in the lowest position. At this point, the dial number displayed on the manual dial roller b1401 is 0, representing the display module 1405, or the visual target, which is closest to the subject's eyes.

[0116] B. Turn the hand wheel b1401 counterclockwise. The distance between the display module 1405 and the subject's eyes will increase. The working principle is as follows:

[0117] a. After aligning and assembling the hand-operated roller b1401, the second thrust cam 1415, and the first thrust cam 1414 according to step ①, the display module will be in the lowest position. At this time, rotate the hand-operated roller b1401 counterclockwise, which will drive the second thrust cam 1415 below to rotate counterclockwise. The spiral push angle on the second thrust cam 1415 will rotate the corresponding spiral push angle of the first thrust cam 1414 from the lowest position to the highest position, and the distance between the display module 1405 and the subject's eyes will gradually increase.

[0118] b. When the combination of the spiral push angle on the second thrust cam 1415 and the spiral push angle of the first thrust cam 1414 on the display module 1405 is at the lowest position, the number on the first dial wheel is 0, and the hand dial wheel b1401 has a total of four numbers: 0, 1, 2, and 3. As the hand dial wheel b1401 is rotated counterclockwise, the numbers on the hand dial wheel b1401 will gradually increase. The flexible screen 13 of the portable nystagmography device is adjusted to the distance measurement interface. The hand dial wheel b1401 is rotated counterclockwise. The numbers on the flexible screen 13 representing the actual distance from the display module 1405 to the subject's eye and the virtual image equivalent distance will also increase in real time. Otherwise, the numbers will decrease.

[0119] C. When designing the product, it is assumed that the portable nystagmography device is correctly worn on the examinee's head in accordance with the specifications, and that the examinee's eyes are absolutely flat relative to the target assembly 3 (i.e., the ideal state where the eyes are neither sunken nor convex). Based on this ideal state, the actual physical distance between the display module and the target assembly 3 is rotated and pushed back horizontally by the linkage mechanical structure. The actual distance between the target assembly 3 and the eye corresponding to each number on the manual dial wheel b1401 is calculated. Specifically, the number 0 = 4 cm, the number 1 = 5 cm, the number 2 = 6 cm, and the number 3 = 7 cm. The corresponding algorithm can be used to deduce the distance based on the refractive index of the lens group, distance mapping, and other parameters. The virtual image equivalent distance of each actual distance is: 0=4cm=0.5m, 1=5cm=1m, 2=6cm=1.5m, 3=7cm=2m. These are the standard values ​​calculated by simulation under ideal conditions. In actual use, they will be affected by factors such as the examinee's head shape, forehead width, facial flatness, eye convexity and concavity, and the wearing of the portable nystagmus imager. The actual values ​​and the standard values ​​calculated by simulation will have more or less discrepancies. At this time, it is necessary to adjust the distance of the target assembly 3 according to the actual situation to adjust it to the distance range from the target to the human eye specified in the nystagmus image examination. The simulation calculation under the above ideal conditions is The standard value will be used as a reference for calibration of the adjustment range. For example, the examinee wears the portable nystagmography device and turns it on, and then adjusts the interface of the flexible screen 13 to the distance measurement interface. At this time, the distance measurement sensor A1412 and the distance measurement sensor B1413 will automatically start, and automatically upload the measured distance parameters from the target assembly 3 to the examinee's eyes to the system and display them on the flexible screen 13. For example, if the actual distance measured is 3.72cm, the system converts the corresponding virtual image equivalent distance to be approximately 0.43m. This value is far less than the specified distance range. At this time, it is necessary to manually increase the actual distance from the target assembly 3 to the eye by turning the hand dial wheel b1 counterclockwise. 401. When the number 1 appears on the hand-turned roller b1401, the flexible screen 13 displays the actual distance = 4.92cm and the virtual image equivalent distance = 0.93m. At this time, the standard value calculated by simulation under the ideal state is compared and referenced: the number on the hand-turned roller b1401 = 1 = actual distance 5cm = virtual image equivalent distance 1m. It can be seen that the distance value of the visual target assembly 3 adjusted this time is credible. Because it is affected by factors such as the flatness of the subject's face and the degree of convexity and concavity of the eyes, this error is a reasonable error. If the error is large, it means that the portable nystagmus tryptophan is not worn properly or has malfunctioned, and it needs to be readjusted or the instrument needs to be checked and adjusted again.

[0120] (3) The mechanical linkage relationship of target adjustment is:

[0121] ① A damping pad 1403 is mounted on the mounting nut column of the hand-moving roller b1401. The damping pad 1403 can increase the damping of the hand-moving roller b1401 so that it can remain in the limited position and not rotate after being moved;

[0122] ② The spiral push angle facing the second thrust cam 1415 is the spiral push angle of the first thrust cam 1414 on the display module 1405;

[0123] ③ Rotating the hand-moving roller b1401 counterclockwise will drive the second thrust cam 1415 below it, and the spiral push angle of the second thrust cam 1415 will drive the spiral push angle of the first thrust cam 1414, thereby driving the entire sight target assembly 3 to move horizontally backward. Because there are module limit screws A1409 and module telescopic springs A1406 and B1407 on the module limit screws B1408 on the high platform nut column 1416 for installing the display module 1405, the movement of the sight target assembly 3 is subject to a pushing and squeezing force, so its movement process is smooth and will not fall off or misplace. According to the above a, the adjusted sight target assembly 3 will not rotate because the hand-moving roller b1401 is damped by the damping pad 1403;

[0124] ④ In the entire structural relationship, because the spiral push angle of the second thrust cam 1415 is always in contact with the spiral push angle of the first thrust cam 1414, the thrust cam will not fall off. When the lowest point of the spiral push angle of the second thrust cam 1415 contacts the lowest point of the spiral push angle of the first thrust cam 1414, the display module 1405 is closest to the human eye, and the number on the hand-operated roller b1401 is 0. When the highest point of the spiral push angle of the second thrust cam 1415 contacts the highest point of the spiral push angle of the first thrust cam 1414, the visual target assembly 3 is farthest from the human eye, and the number on the hand-operated roller b1401 is 3.

[0125] (4) Otoscope assembly:

[0126] ① The top of the main mirror cavity housing 204 is a magnifying glass 201. The two light-transmitting windows of the main mirror cavity housing 204 are respectively a first light-transmitting cover 202 and a second light-transmitting cover 203. The inner side of the lower end of the main mirror cavity housing 204 is an LED light ring 205 with three white light LEDs. The back of the main mirror cavity housing 204 is a flexible cable 212.

[0127] ② On one side of the in-ear cone head shell 211 is the light control switch 209, and on the other side is the hand dial wheel a207, which is connected to the hand dial wheel a207 and the track camera 208, and at the top of the track camera 208 is a cable;

[0128] ③ Connect and assemble the main mirror cavity shell 204 assembled in step 1 and the in-ear cone head shell 211 assembled in step 2 to form this dual-working mode electronic otoscope; in this device, pressing the lamp hole switch 209 can control the on and off of the three white light LED lights, and the control process is: when the lights are off, press the switch to light them up, and press the switch again to turn them off; in this device, toggling the hand dial wheel a207 can control the forward and backward movement of the video electronic otoscope track camera 208, and the control process is: when the track camera 208 moves back to the end point, toggle the hand dial wheel a207 clockwise to move the camera forward, and when the camera moves forward to the end point, toggle the hand dial wheel a207 counterclockwise to move the camera backward;

[0129] (4) The principle of the in-ear cone head and the main mirror cavity circuit and signal conduction is:

[0130] There are four gold finger pins on the cross section of the lower end of the main mirror cavity housing 204, and there are four contact holes at corresponding positions on the cross section of the top end of the in-ear cone head housing 211. After the main mirror cavity housing 204 and the in-ear cone head housing 211 are assembled according to the positioning, the four gold finger pins on the main mirror cavity housing 204 will be inserted into the four contact holes on the in-ear cone head housing 211. Because the four gold finger pins on the main mirror cavity housing 204 are connected to the flexible cable 212, the circuit and signal between the in-ear cone head housing 211 and the main mirror cavity housing 204 are conductive.

[0131] (4) The principle of track camera movement is:

[0132] ① There is a track camera support frame on the inner side of the in-ear cone head shell 211, and there is an air avoidance hole below the track camera support frame and in parallel with the support frame; ② The front of the top of the track camera 208 is a track groove, and the side of the track groove is a rack. There is a sliding track on the cross section below the main mirror cavity. The track groove of the track camera 208 is installed on the sliding track in the correct direction, and then the hand-activated roller a207 is installed on the corresponding rotating shaft on the in-ear cone head shell 211; ③ The teeth of the hand-activated roller a207 will engage with the rack on the track camera 208, and the back of the top of the track camera 208 will be against the track camera support frame, because the track groove on the front of the top of the track camera is connected to the sliding track, at this time, toggling the hand-activated roller a207 can drive the rack on the track camera 208 to move, thereby controlling the retraction and extension of the track camera 208, specifically, toggling the hand-activated roller a207 clockwise to extend the track camera, and toggling the hand-activated roller a207 counterclockwise to retract the track camera;

[0133] ④ Because the track groove and rack travel on the track otoscope and the overall offset angle of the camera have been designed in structure, when the hand-driven roller a207 is turned clockwise to the bottom, the track camera 208 will be pushed out to the center of the inner cavity of the in-ear cone head. When the hand-driven roller a207 is turned counterclockwise to the bottom, the track camera 208 will be retracted into the air avoidance hole. In addition, a light-shielding plug 210 is designed on the outside of the air avoidance hole to prevent light from entering when the track camera 208 is pushed out.

[0134] (4) The process of switching between traditional electronic otoscope and video electronic otoscope is as follows:

[0135] When the track camera 208 is retracted, the in-ear cone head shell 211 and the entire mirror cavity will form a complete viewing channel. At this time, press the light control switch 209 to turn on the LED light, and then put the in-ear cone head shell 211 into the patient's ear canal. Under the illumination of the LED light ring 205 and the light transmission effect of the first light-transmitting cover 202 and the second light-transmitting cover 203, the patient's ear canal and eardrum can be clearly observed through the magnifying glass 201. This is the traditional electronic otoscope working mode; push out the track camera 208, switch the instrument screen to the video electronic otoscope interface, and the track camera 208 will start, and the patient's ear canal will be displayed in real time on the instrument screen. The video image of the patient's ear canal and eardrum can be viewed by clicking the photo and video icon buttons on the screen, and the system will automatically save the photo or video to the patient's ID. This is the working mode of the video electronic otoscope. When the track camera 208 is pushed out, the in-ear cone head shell 211 and the entire mirror cavity viewing channel will be blocked by the track camera 208. At this time, the traditional electronic otoscope will be unusable, and the LED light ring 205 on the traditional electronic otoscope can be turned off, because there is a circle of LED light beads at the end of the track camera 208 of the video electronic otoscope, which will automatically turn on when the track camera is started.

[0136] (5) Working principle and working process of the whole machine

[0137] ① The present invention uses virtual reality technology to implement the visual target function of a portable nystagmus imaging device and present a full-field stimulation effect. The principle is as follows: the visual target assembly 3 has two display modules 1405, and the display module 1405 has a viewing window and lens group A 1410 and lens group B 1411. When the patient wears the device and adjusts the orientation and angle, a superimposed virtual reality model of "human eye - lens group - display module (visual target / screen)" is formed, as shown in the schematic diagram. Figure 12 shown.

[0138] In the present invention, the image on the display module 1405 will be refracted by the lens group A1410 and the lens group B1411 to present a 75-150 inch 16:9 virtual high-definition large screen display effect. The display size changes with the change of the distance from the visual target to the eye: the minimum is 75 inches and the maximum is 150 inches. The model diagram is shown as follows: Figure 13 and Figure 14 shown.

[0139] exist Figure 13 The actual image is displayed on the physical display module A, and B is the virtual screen. The calculation model of the virtual screen pixel size is as follows:

[0140] px1= ((ppd * arctan((l1 / 2) / d1) * 2)) / ((arctan((l1 / 2) / d1) * 2 * π / 180) *(d1 / cos(fov * π / 180 / 2)))) * l1)

[0141] fov = arctan((l1 / 2) / d1) * 2

[0142] px2=ppd*fov

[0143] d2=d / cos(fov * π / 180 / 2)

[0144] l2 = (fov * π / 180) * d2

[0145] px1= (l1* px2) / l2.

[0146] exist Figure 14 In the figure, l1 is the plane physical size, d1 is the plane distance, l2 is the surface physical size, d2 is the surface distance, px1 is the plane pixel size, px2 is the surface pixel size, PPD = pixels per degree: It is an indicator to measure the clarity and realism of an image. It indicates the number of pixels corresponding to each degree of viewing angle. FOV = field of view: field of view, which indicates the angular range of images that the human eye can receive or display.

[0147] Therefore, when the patient wears the instrument, the visual target can present a full-field stimulation effect of a high-definition large screen in front of the patient's eyes.

[0148] ② The visual target of a traditional nystagmography instrument is generally a strip LED screen or a TV, projector, or display. In the nystagmography examination, there is a certain range of requirements for the distance between the subject's eyes and the visual target, specifically: 1.2-1.4 meters for a strip LED screen and 0.8-1 meter for a TV, projector, or display. Within this distance range, the visual target corresponds to a full-view stimulation of the subject without a visual blind spot, and its calibration and the presented stimulation content are more effective and reliable for the subject. The present invention adopts the linkage relationship between the hand-operated roller b1401 and the spiral push angles of the second thrust cam 1415 and the first thrust cam 1414 to realize the horizontal adjustment of the physical distance between the visual target and the subject's eyes. The movement of the physical distance will cause the corresponding movement of the virtual image equivalent distance. The mapping between the physical distance and the virtual distance is a trigonometric function relationship, and its trigonometric function model is: D_virtual=D_physical×(screen_width / eye_to_screen_distance×tan(FOV_degrees / 2) In the model, D_virtual is the physical distance, screen_width is the screen width, eye_to_screen_distance is the distance between the subject's eyes and the screen, and FOV_degrees is the field of view. A rangefinder sensor A1412 and a rangefinder sensor B1413 are installed in the entire linkage device for adjusting the target. These sensors can measure the physical distance between the target (screen) and the subject's eyes in real time. The screen size and the refractive index of the lens assembly are fixed parameters. Therefore, when the physical distance between the target and the subject's eyes changes, the system algorithm can synchronously calculate the corresponding change in the virtual image equivalent distance in real time, ensuring that the distance between the target and the subject's eyes (the virtual image equivalent distance) is within the specified range of the nystagmus map examination. To avoid errors caused by improper instrument wear or other subjective and objective reasons, the present invention designs a standard value for the virtual image equivalent distance corresponding to the physical distance between the target and the subject's eyes, calculated under ideal conditions, for calibration and verification of the adjusted distance value.

[0149] ③ The working principle of the present invention is as follows: the subject wears a portable nystagmus image instrument to perform nystagmus image testing, and calibration and video calibration are performed to ensure that the crosshairs of the system tracking algorithm are always locked on the fovea of ​​the pupil during eye movement, so as to ensure the accuracy and reliability of nystagmus collection. During the test, the visual target will play the corresponding stimulation content according to the test items. There is a dichroic mirror 6 between the visual target and the subject's eyes. The stimulation content on the visual target is presented to the patient through the dichroic mirror 6 to induce the patient's nystagmus. At the same time, when the patient watches the stimulation content on the visual target, the movement of his eyeballs will be automatically projected onto the dichroic mirror 6. There is a camera assembly 3 on each right side facing the dichroic mirror 6. There is an infrared lamp on the camera assembly 3 with the same angle as the dichroic mirror 6. The camera assembly 3 will collect the projected images of the patient's eye movements on the two dichroic mirrors 6 in real time and transmit them synchronously and in real time to the main control system. The eye movements of the subject's eyes are displayed in real time on the flexible screen 13 outside the instrument. When the test is completed, the nystagmus of the current patient can be analyzed on the instrument. The conventional nystagmus parameters such as the intensity, direction, number, frequency and duration of the nystagmus and the special nystagmus parameters for different tests can be analyzed, and a nystagmus curve chart can be drawn as a basis for doctors to diagnose the condition.

[0150] ④The working process of this utility model is:

[0151] A. The operator helps the patient wear the instrument correctly, adjusts the tightness of the left anti-slip headband 101 and the right anti-slip headband 102 by adjusting the knob 103, turns on the instrument, and adjusts the focus and angle of the camera according to the video of the patient's eyes displayed on the flexible screen 13, so that the patient's eye video captured by the camera assembly 3 is clear and comprehensive; if the position of the video captured by the camera assembly 3 is incorrect and the problem cannot be solved by adjusting the angle of the camera assembly 3, it is necessary to remove the instrument and adjust the angle of the dichroic mirror 6 to solve the problem. The adjustment method is to put on dust-proof gloves and rotate the dichroic mirror 6, because the dichroic mirror 6 is fixed on the dichroic mirror rotating shaft seat 5, and the dichroic mirror rotating shaft seat 5 is connected to the rotating shaft seat base 4 by a rotating shaft. The two are movable bodies, and the angle of the dichroic mirror 6 can be adjusted by rotating the dichroic mirror 6. The adjustment angle is limited by the limit groove on the rotating shaft seat base 4. Its adjustment range, that is, it can only be adjusted within a certain reasonable range. If the adjustment angle is too large, it will deviate from the center collection area of ​​the camera assembly 3;

[0152] B. Switch the flexible screen 13 to the video calibration interface and adjust the brightness and contrast of the pupil / iris to the maximum;

[0153] C. Adjust the distance between the sight target and the eye to meet the distance range required for nystagmus examination. For adjustment methods, see the Working Principle of the Sight Target Assembly.

[0154] D. Perform calibration. Switch the flexible screen 13 to the calibration interface. Start calibration. Five calibration points arranged in a cross will appear on the built-in target. The lights of the five calibration points will light up randomly. The speaker 11 on the instrument will automatically issue a voice prompt to remind the subject to stare at the screen in front of him. The eyeballs should move as the calibration point lights up, that is, the eyes should track the position of the lights to test the target tracking ability of the eyeballs when the eyes gaze from one part to another according to the angle of the moving point of the light target. When the target is tracked correctly, the calibration point will be checked on the external screen of the instrument. If the tracking fails, the calibration point will be crossed. When all five calibration points are calibrated, click the OK button to enter the test main interface. At this time, if any calibration point fails to track, the corresponding calibration point will be prompted to recalibrate. Click Yes to re-enter the calibration interface. Click No to enter the test main interface and a pop-up prompt will be displayed to indicate that the calibration has not passed. This will affect the test results. At this time, you can re-calibrate or ignore it. However, failure of the calibration will affect the authenticity of the test results.

[0155] E. Nystagmus image examination test. This utility model has a total of 7 routine tests for nystagmus image examination: spontaneous nystagmus test, gaze test, smooth pursuit test, saccade test, optokinetic nystagmus test, dynamic position test, static position test and temperature test. Each test can be performed in sequence:

[0156] In the spontaneous nystagmus test, the visual target is in a closed state, and the test is for the patient's spontaneous nystagmus in a dark visual environment. When the speaker 11 on the spontaneous nystagmus test instrument is turned on, a voice prompt will automatically be issued to remind the subject to look straight ahead and maintain a natural and relaxed state. On the camera assembly 3, there is a fixation suppression light 319 that is consistent with the angle of the dichroic mirror 6. During the test, the fixation suppression light 319 can be set to light up at a specified time period or manually turned on. At this time, if the nystagmus intensity is significantly weakened or the nystagmus disappears, it is considered that fixation suppression is successful, which often represents physiological nystagmus. If the nystagmus intensity does not show signs of weakening or the nystagmus appears to be enhanced after fixation, it is considered that fixation suppression has failed, which often represents pathological nystagmus.

[0157] The gaze test target will fix the position of the cursor on the screen at a position offset by 30 degrees in the four directions of up, down, left and right. The test subject will stare at the cursor for at least 20 seconds. Normal people will not experience nystagmus when staring, but abnormal individuals will experience different degrees of nystagmus at different positions. Before the current punctuation mark disappears and the next punctuation mark is started, the punctuation mark will return to the middle position first, that is, the punctuation mark in each direction is started from the middle position to prevent the patient from predicting the position of the punctuation mark. However, the operator can know the direction of the next test punctuation mark according to the test sequence dialog box on the external screen of the instrument. When the gaze test instrument is started, the speaker 11 will automatically issue a voice prompt to remind the subject to stare at the punctuation mark with both eyes and move the eyeballs with the movement of the punctuation mark.

[0158] In the steady pursuit test, a dot will appear at a random position on the visual target. The dot moves in a certain waveform (such as a sine wave or triangle wave). When the speaker on the test instrument is activated, a voice prompt will be automatically emitted to prompt the subject to follow the dot with both eyes. The subject should not predict the location of the dot. The nystagmus produced when the subject observes the dot on the visual target is called pursuit nystagmus.

[0159] In the saccade test, a dot appears on the visual target. The dot's movement can be fixed or random, ranging from 5 degrees to 25 degrees. Activating the speaker 11 on the test instrument automatically issues a voice prompt to prompt the subject to track the dot with both eyes. The nystagmus induced by the subject observing the dot jumping back and forth in the horizontal or vertical direction is called saccadic nystagmus. After the test is completed, the system automatically deletes unusable data and processes the available data to draw a nystagmus map. The main nystagmus parameters analyzed are maximum velocity, saccadic accuracy, and saccadic latency.

[0160] In the optokinetic nystagmus test, a yellow and blue matrix circular grating will appear on the visual target and move to the left or right at a certain speed, and the speed of movement can be selected. The nystagmus produced when the subject observes the moving matrix circular grating on the screen is called optokinetic nystagmus. When the speaker 11 on the test instrument is turned on, a voice prompt will automatically be issued to prompt the subject to try to count while observing the grating and to stare at the center of the screen. The cursor or grating movement speed can be selected at 20 degrees / second, 40 degrees / second, 60 degrees / second or other speeds. The standard test generally chooses 40 degrees / second.

[0161] The visual target is off during the dynamic and static position tests, which are collectively referred to as positional tests. Nystagmus produced when the subject changes position is called positional nystagmus. Static position tests include sitting, supine, and supine head-hanging positions, while dynamic positions include Dix-hallpike (supine-sitting, lateral-sitting) and Roll-over. Upon starting the dynamic and static position tests, the speaker on the instrument will automatically issue a voice prompt prompting the subject to perform the prescribed movements and position changes.

[0162] During the temperature test, the visual target is closed. Before the temperature test, the subject's external auditory canal and tympanic membrane need to be examined with the electronic otoscope on the instrument. The tympanic membrane image can be displayed in real time on the external display screen to reduce false positive results of the double temperature test and improve diagnostic accuracy. Patients with external otitis or tympanic membrane perforation are prohibited from undergoing the temperature test. The examination results can be photographed or recorded as a video and saved to the patient ID corresponding to the instrument to facilitate more objective and accurate evaluation of the test results and subsequent follow-up visits. The temperature test is mainly used to detect the horizontal semicircular canal of the vestibular organs. During the test, the patient needs to lie on his back at a 30-degree angle to the horizontal direction so that the horizontal semicircular canal is in a vertical state. Then, hot and cold water or air are poured into the patient's left and right ears respectively. The amount of irrigation depends on different individuals and actual conditions. The fast phase of the nystagmus induced by heat stimulation is directed toward the ipsilateral side of the stimulated ear, and the fast phase of the nystagmus induced by cold stimulation is directed toward the contralateral side of the stimulated ear. The induced nystagmus lasts for about 3 minutes.

[0163] F. During the test, the instrument's external screen displays the subject's eye movement videos and corresponding nystagmus waveforms in real time. After the test is completed, the instrument's test results can be analyzed by entering the analysis interface. The analysis report contains the nystagmus parameters and nystagmus diagrams corresponding to each test. The instrument can print the test report via a wireless connection to a printer.

[0164] The external display screen of the instrument is a flexible screen 13. Compared with the combination of LED or LCD screen + touch screen, the flexible screen 13 is lighter, which can greatly reduce the weight of the whole device and improve the comfort of patients wearing it; and the flexible screen 13 is fixed and connected to the instrument through a flip bracket 12. During the inspection, the operator can flip the flexible screen 13 to a suitable angle for viewing, which can avoid unclear vision due to sunlight or difficulty in viewing due to incorrect angles and directions when doing related tests.

[0165] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims, or equivalents thereof.

Claims

1. A multifunctional portable nystagmography device based on virtual reality, characterized in that: include: A housing (8), the rear side of which is a wearing end and the front side of which is a viewing end; An adjustable headband (1) detachably connected to the wearing end of the housing (8); Two otoscopes (2), respectively arranged on both sides of the adjustable headband (1); Two dichroic mirrors (6) are vertically and rotatably arranged in the housing (8); Two camera assemblies (3) are respectively arranged on both sides of the housing (8), and the camera angles thereof are adjustable and arranged inside the housing (8) and correspond to the dichroic mirror (6); A sight target assembly (14) with an adjustable distance from the eyeball is provided on a viewing window at the visual field end of the housing (8); An external display interaction device is arranged outside the visual target assembly (14); The otoscope (2), the camera assembly (3) and the visual target assembly (14) are respectively connected to corresponding terminals of the external display interactive device.

2. The multifunctional portable nystagmography device based on virtual reality according to claim 1, characterized in that: The adjustable headband (1) comprises: The base (106) has a groove on its rear side, and a limit back plate (113) is buckled on the groove; A shaft column (112) is vertically arranged in the groove, and a return spring (109) and a gear shaft (108) are sequentially mounted thereon; An adjusting knob (103) is arranged on the outer wall of the limiting back plate (113), and its main shaft passes through the thin wall of the limiting back plate (113) and is connected to the gear shaft (108); A left anti-slip headband (101) has one end as an adjustment end and the other end as a connection end, an adjustment square hole is provided on the adjustment end, and a lower rack is provided on the side wall below the adjustment square hole; The right anti-slip headband (102) has one end as an adjustment end and the other end as a connection end, the adjustment end is also provided with an adjustment square hole, and an upper rack is provided on the side wall above the adjustment square hole; The adjustment ends of the left anti-slip headband (101) and the right anti-slip headband (102) are overlapped and arranged in the groove, and the upper rack and the lower rack are respectively engaged with the gear ring on the outer wall of the gear shaft (108), so that when the gear shaft (108) rotates, the left anti-slip headband (101) and the right anti-slip headband (102) can be pushed; The connection ends of the left anti-slip headband (101) and the right anti-slip headband (102) are both connected to the two sides of the housing (8) via adjustable and detachable buckles.

3. The multifunctional portable nystagmography device based on virtual reality according to claim 2, characterized in that: A base cushioning cotton (107) is provided on the front side of the base (106); a two-color mirror rotating shaft seat (5) is provided at the bottom of the two-color mirror (6); the two-color mirror rotating shaft seat (5) is provided on the rotating shaft seat base (4), and the rotating shaft seat base (4) is provided in the shell (8); and a fitting mask (9) is provided on the wearing end of the shell (8).

4. The multifunctional portable nystagmography device based on virtual reality according to claim 2, characterized in that: Two sliding bar holes are provided on the adjustment ends of the left anti-slip headband (101) and the right anti-slip headband (102), and the two sliding bar holes are respectively corresponding to the left upper limit pin (110) and the right lower limit pin (111) on the rear side wall of the base (106).

5. The multifunctional portable nystagmography device based on virtual reality according to claim 2, characterized in that: The buckle includes: A connecting plate (7), the front end of which is hinged to the outer wall of the housing (8); A card plate (20) is provided with card slots (19) on its upper and lower sides, and the card plate (20) is plugged into the connecting plate (7) through the card slots (19); The connecting plate (7) and the clamping plate (20) are both provided with mounting bar holes (18) and are connected to each other via bolts (17).

6. The multifunctional portable nystagmography device based on virtual reality according to claim 2, characterized in that: Also includes: A battery (115) is disposed in a battery compartment within the base (106), and an inlet of the battery compartment is disposed at the bottom of the base (106); A battery compartment bottom cover (114) snapped onto the entrance of the battery compartment; An upper headband (104) is arranged on the upper part of the base (106), one end of which is plugged into the plug interface at the top of the base (106), and the other end is fixed to the housing (8) via an upper headband fixing strip (105); A wire is provided in the upper headband (104), one end of the wire is connected to the battery (115), and the other end is connected to the otoscope (2), the camera assembly (3), the visual target assembly (14), and the power-consuming part of the external display interactive device.

7. The multifunctional portable nystagmography apparatus based on virtual reality according to claim 6, characterized in that: The otoscope (2) comprises: Primary mirror cavity housing (204); The first light-transmitting cover (202) and the second light-transmitting cover (203) are respectively arranged on the mounting holes on both sides of the main mirror cavity housing (204); A magnifying mirror (201) is arranged on a mounting hole at the front end of the main mirror cavity housing (204); An LED light ring (205) is arranged on a mounting hole at the rear end of the main mirror cavity housing (204), and has a plurality of LED lighting lamps (206) evenly distributed thereon; An in-ear conical head housing (211) is mounted on the rear end of the main mirror cavity housing (204); A light-controlled switch (209) is provided on the side wall of the in-ear cone head housing (211) and is connected in series to the power supply circuit of the LED lighting lamp (206); A light shielding plug (210) is provided on a hole on the side wall of the in-ear cone head housing (211); A track camera (208) disposed within the in-ear cone head housing (211); The hand-operated roller a (207) is arranged on a mounting hole on the side wall of the in-ear cone head housing (211) and is engaged with a rack vertically arranged on the track camera (208), so that when the hand-operated roller a (207) is rotated, the track camera (208) can be driven to move up and down; The flexible cable (212) has one end connected to the signal output terminal and the power supply circuit of the track camera (208), and the other end connected to the external display interaction device and the battery (115).

8. The multifunctional portable nystagmography apparatus based on virtual reality according to claim 6, characterized in that: The camera assembly (3) comprises: The housing A (305) has three threaded holes on its outer wall, each of which is provided with a focus adjustment knob (301), a horizontal angle adjustment knob (302), and a vertical angle adjustment knob (303); A support frame (306) is disposed in the housing A (305); A support platform (307) is provided on the support frame (306), and a cylindrical protruding rod on the support platform (307) is inserted into a circular hole at the center of the support frame (306); The camera module mainboard (308) is clamped on the support platform (307); The module mainboard base (309) is plugged into the camera module mainboard (308); A filter (310) is provided on a central hole on the module mainboard base (309); The lens base (311) is plugged into the module mainboard base (309), and the inner dustproof and anti-aperture ring on the lens base (311) is assembled into the outer dustproof and anti-aperture ring in the center of the module mainboard base (309). At the same time, the two ends of the lens base (311) are connected to the two ends of the support frame (306); The LED light circuit board (312) has one side corresponding to the lens base (311) and the other side pressed against the center hole of the housing B (315) through the adjustment spring (314). The wiring terminals on the LED light circuit board (312) are connected to the wiring of the camera module mainboard (308). The housing B (315) and the housing A (305) are buckled together to form a box body. The lens (316) is arranged on the center hole of the housing B (315), and is threadedly mounted on the lens base (311) after passing through the center hole of the housing B (315), the adjustment spring (314), and the center hole of the LED lamp circuit board (312) in sequence; Infrared fill light A (317), infrared fill light B (318) and fixation suppression light (319) are arranged on the outer wall of housing B (315) and are respectively connected to the LED light circuit board (312); A flat cable (313), one end of which passes through the housing B (315) and is connected to the camera module mainboard (308), and the other end of which is respectively connected to the external display interactive device and the battery (115); The focus adjustment knob (301), the horizontal angle adjustment knob (302) and the vertical angle adjustment knob (303) are all provided with a limit spring (304); the focus adjustment knob (301) passes through the circular hole at the center of the support frame (306) and is pressed against the corresponding conical arc groove on the cylindrical protruding rod of the support platform (307); the end of the horizontal angle adjustment knob (302) is pressed against the horizontal edge of the support frame (306); and the end of the vertical angle adjustment knob (303) is pressed against the vertical edge of the support frame (306).

9. The multifunctional portable nystagmography apparatus based on virtual reality according to claim 6, characterized in that: The sight target assembly (14) comprises: A display module (1405) having a first thrust cam (1414) rotatably disposed on its inner side; Lens group A (1410) and lens group B (1411) are arranged on the viewing window inside the display module (1405) and are respectively located on both sides of the first thrust cam (1414). At the same time, a distance sensor A (1412) and a distance sensor B (1413) are respectively installed thereon, and the signal output ends of the distance sensor A (1412) and the distance sensor B (1413) are connected to the external display interaction device; The hand-operated roller b (1401) is rotatably mounted on the side wall of the viewing end of the housing (8) via a damping pad (1403) and a roller positioning screw (1402); A driven gear (1404) is rotatably mounted on the side wall of the housing (8) at the viewing end and meshes with the teeth on the hand-operated roller b (1401); A second thrust cam (1415) is mounted at the center of the driven gear (1404), and when the driven gear (1404) rotates, it can drive the second thrust cam (1415) to rotate together; Among them, the inner side of the display module (1405) corresponds to the visual field end of the shell (8), and the two sides of the display module (1405) are respectively connected to the two high platform nut columns (1416) on the visual field end of the shell (8) through the module limit screw A (1409) and the module limit screw B (1408) and the module telescopic spring A (1406) and the module telescopic spring B (1407) respectively mounted on the module limit screw A (1409) and the module limit screw B (1408). At this time, the first thrust cam (1414) and the second thrust cam (1415) are in corresponding contact with each other.

10. The multifunctional portable nystagmography device based on virtual reality according to claim 9, characterized in that: The external display interaction device includes: The outer shell (16) is engaged with the shell (8) to form a box body; The main control board (10) of the whole machine is arranged in the outer shell (16); A flexible screen flip bracket (12) is flippably arranged on the front side wall of the outer shell (16); A flexible screen (13) is arranged on the flexible screen flip bracket (12) and is connected to the main control board (10) of the whole machine via a signal cable; A speaker (11), a volume key, a power indicator light guide column, an on / off key, and a charging indicator light guide column are provided on the outer wall of the outer shell (16), and all of them are connected to the main control board (10) of the whole machine.

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