Eye fatigue testing device with nose pad structure

Abstract

The utility model relates to an eye fatigue testing device with a nose pad structure, which comprises a head-mounted device main body, a suspension connecting frame and a double-infrared camera component, the suspension connecting frame is obliquely arranged at the middle position below the head-mounted device main body outwards, and the double-infrared camera component is arranged at the bottom end of the suspension connecting frame; an elastic nose pad is arranged on the back face of the suspension connecting frame, the elastic nose pad comprises a connecting and fixing part and a nose bridge supporting part which are integrally formed, the connecting and fixing part is detachably connected with the suspension connecting frame, and the nose bridge supporting part is used for being supported on the nose bridge of a testee. The elastic nose pad is arranged on the back face of the suspension connecting frame of the head-mounted main body, the elastic nose pad comprises the connecting fixing part and the nose bridge supporting part, the nose bridge supporting part is supported on the nose bridge of the testee, the stability of the device in the wearing process is facilitated, the elastic nose pad has flexibility, and the wearing comfort is improved.

Description

Technical Field

[0001] This utility model relates to the field of eye testing devices, specifically to an eye fatigue testing device with a nose pad structure. Background Technology

[0002] Eye strain, also known as visual fatigue or screen time syndrome, is a common symptom of discomfort after prolonged use of electronic screens (such as computers, tablets, and smartphones). Eye strain testing can help people understand their eye health and take appropriate measures to relieve fatigue. By collecting infrared image data of the eyes and extracting pupil parameters, various parameters about the pupil can be obtained, such as pupil diameter, pupillary variability, and pupillary adaptation speed. Further analysis and processing of the collected images can then measure eye strain.

[0003] Chinese invention patent publication number CN117173776A proposes a method for pupil fatigue detection based on infrared camera data, which acquires infrared image data of the subject's eyes; and processes the infrared image data of the eyes using an image processing algorithm to obtain pupil fatigue detection results. However, the infrared camera in this technical solution is a standalone device placed on a table, requiring professional debugging to ensure that the infrared camera is accurately aligned with the eyes, resulting in inconvenience in use.

[0004] To make eye fatigue testing devices easier to use, people have borrowed from eye trackers and attached infrared cameras to head-mounted products. By wearing the device on the head, the infrared camera can take close-up pictures of the eyes. For ease of shooting, the infrared camera is usually placed near the bridge of the nose, close to the wearer's eyes. However, adding two infrared cameras increases the weight of the product and shifts the center of gravity forward, resulting in poor stability when wearing the product and causing discomfort to the wearer's nose. Utility Model Content

[0005] To address the issue of insufficient wearing stability in existing head-mounted eye fatigue testing devices, this invention provides an eye fatigue testing device with a nose pad structure.

[0006] The technical solution of this utility model is as follows:

[0007] An eye fatigue testing device with a nose pad structure is characterized by comprising a head-mounted device body, a suspension connecting frame, and a dual infrared camera assembly. The suspension connecting frame is inclined outward and positioned at the center below the head-mounted device body. The dual infrared camera assembly is located at the bottom end of the suspension connecting frame. An elastic nose pad is provided on the back of the suspension connecting frame. The elastic nose pad includes an integrally formed connecting and fixing part and a nose bridge supporting part. The connecting and fixing part is detachably connected to the suspension connecting frame, and the nose bridge supporting part is used to support the nose bridge of the test subject.

[0008] According to the above-described scheme, the present utility model is characterized in that the vertical distance from the back of the top of the suspension connecting frame to the back plate of the head-mounted device body is 5 to 10 mm, and the tilt angle of the back of the suspension connecting frame is 10° to 15°.

[0009] According to the above-described scheme, the present invention is characterized in that the end of the nose bridge support extends to below the nose pad of the test subject's glasses.

[0010] According to the above-described scheme, the present invention is characterized in that the two supporting nose bridge portions are turned outwards, and the outer surfaces of the two supporting nose bridge portions respectively abut against the eyeglass frame of the test subject.

[0011] According to the above-described solution, the present utility model is characterized in that the housing of the suspension connecting frame includes a front housing and a back plate, the back plate of the connecting frame is provided with a nose pad mounting groove, and the connecting fixing part is detachably installed in the nose pad mounting groove.

[0012] Furthermore, the nose pad mounting groove is provided with a plurality of screw holes, the connecting fixing part is provided with a strip-shaped hole, and a plurality of round holes are provided in the length direction of the strip-shaped hole corresponding to the position of the screw holes, and the width of the round holes is greater than the width of the strip-shaped hole.

[0013] Furthermore, the front shell of the head-mounted device body includes an integrally formed functional part shell and support part shells located on both sides, and the connecting frame front shell is integrally formed at the lower middle of the functional part shell. The back plate of the head-mounted device body includes a left support back plate, a middle back plate and a right support back plate. The left support back plate and the right support back plate correspond to the two support part shells respectively, and the middle back plate corresponds to the functional part shell.

[0014] Furthermore, the back panel of the main body of the head-mounted device is made of thermoplastic polyurethane, and the surface of the back panel is provided with several rubber pads or silicone pads.

[0015] Furthermore, the functional unit housing is composed of a top plate, a front plate, and a bottom plate, and the top plate, the front plate, and the bottom plate are all provided with a number of heat dissipation holes.

[0016] Furthermore, the inner wall of the front shell is provided with a fastening protrusion near the edge, and the back plate is provided with a fastening hole along its edge. The fastening protrusion and the fastening hole are detachably connected. The inner wall of the front shell is provided with several sets of screw seats, and the back plate is provided with several screw holes corresponding to the screw seats. Screws are inserted into the screw seats through the screw holes for fastening.

[0017] The advantages of this utility model based on the above solution are as follows:

[0018] The head-mounted main body of this utility model is equipped with dual infrared camera components through a suspension connecting frame, and the back of the suspension connecting frame is provided with an elastic nose pad. The elastic nose pad includes an integrally formed connecting and fixing part and a nose bridge supporting part. The connecting and fixing part is detachably connected to the suspension connecting frame, and the nose bridge supporting part supports the nose bridge of the test subject, which is beneficial to the stability of the device when worn. In addition, the elastic nose pad is soft, which improves the comfort of wearing.

[0019] Furthermore, during the installation of the elastic nose pad, the connecting and fixing parts of this utility model are not prone to displacement, ensuring that the supporting nose bridge parts on both sides are stably supported on the nose bridge of the test subject.

[0020] Furthermore, the end of the nose bridge support extends to below the nose pads of the test subject's glasses. Both the nose pads of the glasses and the nose bridge support of the elastic nose pads are in contact with the nose bridge of the test subject. Therefore, the weight of the device can be transferred through its elastic nose pads, rather than through the nose pads of the glasses. This increases the contact area between the device and the nose bridge of the test subject, avoiding discomfort to the nose bridge of the test subject when wearing it. Attached Figure Description

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0023] Figure 3 This is a schematic diagram showing the installation of the suspension connector and the elastic nose pad;

[0024] Figure 4 This is a diagram showing the usage state of this utility model;

[0025] Figure 5 This is a partial schematic diagram of the back of the present invention;

[0026] Figure 6 This is an exploded view of the shell structure of this utility model;

[0027] Figure 7 This is an exploded view of the suspension connecting frame of this utility model;

[0028] Figure 8 for Figure 7 Enlarged view of part A in the middle.

[0029] In the diagram,

[0030] 1. Main body of the head-mounted device;

[0031] 11. Core functional unit; 12. Support leg; 121. Through-loop; 13. TF card slot; 14. TOF sensor; 15. Elastic band; 16. Light sensor; 101. Functional unit housing; 1011. Rib; 102. Support leg housing; 103. Left support leg back plate; 104. Middle back plate; 1041. Rubber pad; 105. Right support leg back plate;

[0032] 2. Suspension connecting frame;

[0033] 21. Front housing of connecting frame; 22. Back plate of connecting frame; 221. Nose pad mounting groove; 23. Rotating shaft; 231. First abutment surface; 232. Second abutment surface; 233. Rotation opening; 234. Gap; 24. Fastening bolt; 25. Polygonal nut;

[0034] 3. Dual infrared camera assembly;

[0035] 31. Support rod; 32. Connecting rod; 321. Shaft groove; 3211. Groove edge; 33. Infrared camera; 34. Infrared supplementary light;

[0036] 4. Elastic nose pads;

[0037] 41. Connecting and fixing part; 42. Strip hole; 43. Nose bridge support part;

[0038] 5. Control box;

[0039] 6. Eyeglasses. Detailed Implementation

[0040] To better understand the purpose, technical solution, and technical effects of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will provide further explanation. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need further definition and explanation in subsequent drawings. It is also stated that the embodiments described below are only for explaining this utility model and are not intended to limit it.

[0041] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.

[0042] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship in which a person skilled in the art would normally understand it, or the orientation or positional relationship in which the product is usually placed when in use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] The terms “first” and “second” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features. “Several” means two or more, unless otherwise expressly and specifically defined.

[0044] like Figures 1 to 4 As shown, an eye fatigue testing device with a nose pad structure includes a head-mounted device body 1, a suspension connecting frame 2, and a dual infrared camera assembly 3. The suspension connecting frame 2 is tilted outward and positioned in the middle below the head-mounted device body 1. The dual infrared camera assembly 3 is located at the bottom end of the suspension connecting frame 2. The head-mounted device body 1 is detachably worn on the forehead of the test subject. The other end of the suspension connecting frame 2 tilts downward and extends beyond the test subject's eyes. The suspension connecting frame 2 provides an angle that does not interfere with the field of vision for mounting the dual infrared camera assembly 3. The two infrared cameras 33 of the dual infrared camera assembly 3 capture images of the test subject's two eyes from bottom to top to capture images of the test subject's eyes.

[0045] The back of the suspension connector 2 is provided with an elastic nose pad 4. The elastic nose pad 4 includes an integrally formed connecting and fixing part 41 and a nose bridge supporting part 43. The connecting and fixing part 41 is detachably connected to the suspension connector 2, and the nose bridge supporting part 43 is used to support the nose bridge of the test subject. The suspension connector 2 is supported on the nose bridge of the test subject by the elastic nose pad 4, which is beneficial to the stability of the device when worn. In addition, the elastic nose pad 4 is soft, which can improve the comfort of wearing.

[0046] like Figure 2 As shown, in this embodiment, the vertical distance L from the top back of the suspension connector 2 to the back plate of the head-mounted device body 1 is 5 to 10 mm, and the tilt angle a of the back of the suspension connector 2 is 10° to 15°, so that there is enough space between the top back of the suspension connector 2 and the brow bone of the test subject to accommodate the frame of the myopia glasses 6. At the same time, the suspension connector 2 is tilted at a certain distance away from the test subject at its top to ensure that the suspension connector 2 will not bump the bridge of the nose of the test subject even at a small tilt angle.

[0047] like Figure 3As shown, in this embodiment, the nose bridge support portion 43 is formed by folding and extending the end of the connecting and fixing portion 41, and is perpendicular to the connecting and fixing portion 41. The connecting and fixing portion 41 is provided with a strip-shaped hole 42, and the nose pad mounting groove 221 is provided with a plurality of screw holes. The strip-shaped hole 42 is provided with a round hole at the position corresponding to the screw hole. The plurality of round holes are arranged along the length direction of the strip-shaped hole 42, and the width of the round hole is greater than the width of the strip-shaped hole 42. After the plurality of screws pass through the corresponding round holes and screw holes in sequence, they are tightened. The strip-shaped hole 42 deforms under the screw extrusion force, so that the extrusion force is released at the strip-shaped hole 42 and is not transmitted to the outside of the connecting and fixing portion 41. Therefore, during the installation process, the connecting and fixing portion 41 of the elastic nose pad 4 will not deform or shift, and the nose bridge support portions 43 on both sides are symmetrically and stably supported on the nose bridge of the test subject.

[0048] like Figure 1 and Figure 4 As shown, the end of the nose bridge support portion 43 extends below the nose pad of the test subject's glasses 6, and the nose bridge support portion 43 is turned outward so that the outer side of the nose bridge support portion 43 abuts against the two frames of the glasses 6 respectively. When the test subject wears the eye fatigue testing device with nose pad structure of this embodiment while wearing glasses 6, both the nose pad of glasses 6 and the nose bridge support portion 43 of the elastic nose pad 4 are in contact with the nose bridge of the test subject. In this way, the weight of the device is transferred to the nose bridge through its elastic nose pad 4, rather than the weight of the device and the weight of glasses 6 being transferred through the nose pad of glasses 6. Therefore, the nose bridge support portion 43 of this embodiment increases the contact area between the device and the nose bridge of the test subject, reduces pressure, and avoids wearing discomfort.

[0049] As can be seen, the optimized nose pad structure of the eye fatigue testing device makes it compatible with glasses 6, avoiding discomfort on the bridge of the nose caused by prolonged wear and increasing wearing comfort for test subjects wearing glasses 6. The softness of the elastic nose pad 4 can also adapt to different users' nose shapes, ensuring a better wearing experience for each user. This embodiment is also more suitable for test subjects who need to wear the device for eye fatigue testing for extended periods.

[0050] like Figure 6 As shown, in this embodiment, the head-mounted device body 1 includes a core functional part 11 located in the middle and support legs 12 located on both sides. The ends of the support legs 12 are provided with loops 121, and the loops 121 of the two support legs 12 are respectively connected to the two ends of an elastic band 15. The elastic band 15 is provided with an adjustment ring, which allows adjustment of the length of the elastic band 15, thereby adjusting the wearing size of the head-mounted device body 1 to accommodate users with different head circumferences, ensuring wearing comfort and stability. In other optional embodiments, the loops 121 of the two support legs 12 are respectively connected to fastening straps with Velcro.

[0051] The core functional unit 11 in the middle of the head-mounted device body 1 houses core electronic components, including a processing chip, to perform multiple functions, including data processing, data storage, and data transmission of images acquired by the infrared camera. The core functional unit 11 in the middle of the head-mounted device body 1 is larger than the size of the two side legs 12. The core functional unit 11 has a large housing chamber and a built-in main board. The main board integrates at least a processing chip, memory, and flash memory. The processing chip is used to process data collected from the dual infrared camera assembly 3 and to execute image processing algorithms and other related computational tasks. The memory is used to temporarily store running data and programs. The flash memory is used to store firmware parameters, configuration file parameters, and preset parameters.

[0052] The core functional unit 11 also includes a TF card slot 13, which is used to insert a TF card (i.e., a memory card) to store detection data, images, and other relevant information. The TF card slot 13 supports hot-swapping, making it convenient for users to replace or retrieve data.

[0053] The motherboard also integrates a WiFi module, a 4G / 5G module, and a Bluetooth module. The WiFi module supports uploading detection data to cloud services via WiFi network; the 4G / 5G module provides cellular network connectivity so that data can be transmitted even without WiFi; and the Bluetooth module enables short-range wireless communication with smartphones or other mobile devices, facilitating real-time data viewing or device settings.

[0054] The core functional unit 11 also includes a Time-of-Flight (TOF) sensor 14. The TOF sensor 14 is positioned directly in front of the head-mounted device 1, i.e., in the direction of the wearer's gaze. It is used to monitor the environment in front of the device, providing distance and depth information to help the system better understand the user's position, thereby optimizing the performance of the infrared camera components. For example, when a user looks down at a book, if the TOF sensor 14 detects an approaching obstacle, the system can trigger a pause in detection and remind the user to look up, avoiding false detections and obtaining more accurate results.

[0055] One end of one of the support legs 12 of the head-mounted device body 1 is equipped with a TYPE-C interface, through which a power supply box or a control box 5 can be connected. The power supply box, also known as a portable charger, ensures sufficient battery life for the device. The control box 5 not only provides power management functions but also allows users to perform various controls on the head-mounted device body 1.

[0056] like Figure 6As shown, in a preferred embodiment, the front shell of the head-mounted device body 1 includes an integrally formed functional part shell 101 and a foot part shell 102 located on both sides, and an integrally formed connecting frame front shell 21 is located at the lower center of the functional part shell 101. The back plate of the head-mounted device body 1 includes a left foot back plate 103, a middle back plate 104 and a right foot back plate 105. The left foot back plate 103 and the right foot back plate 105 correspond to the two foot part shells 102 respectively, and the middle back plate 104 corresponds to the functional part shell 101.

[0057] The front shell and back plate are fastened together and secured with screws. The inner wall of the front shell has a fastening protrusion near its edge, and the back plate has fastening holes along its edge; the fastening protrusion and fastening holes are detachably fastened together. The inner wall of the front shell has several sets of screw seats, and the back plate has several screw holes corresponding to these screw seats; screws pass through the screw holes and are tightened into the screw seats. The back plate is preferably made of thermoplastic polyurethane, which has good elasticity and flexibility, strong wear resistance, and a long service life. The surface of the middle back plate 104 is provided with several rubber pads 1041 or silicone pads to provide greater elasticity and further improve the comfort of wearing the device.

[0058] The functional housing 101 consists of a top plate, a front plate, and a bottom plate, forming a C-shaped cavity with an opening on one side. The top plate has several heat dissipation holes and slots. The front plate has a sensor sensing cutout in the middle, and several more heat dissipation holes on both sides of the sensor sensing cutout. The bottom plate has a notch in the middle, to which the connecting frame front housing 21 is connected. Several more heat dissipation holes on both sides of the notch are also provided on the bottom plate. These heat dissipation holes provide airflow channels for the C-shaped cavity and are arranged around the core electronic components, ensuring that air can enter and exit the C-shaped cavity from different directions, thus improving the heat dissipation efficiency of the core electronic components. The sensor sensing cutout serves as the sensing window for the TOF sensor 14, ensuring that the TOF sensor 14 can accurately sense the environment in front. The notch in the bottom plate provides a threading port for the connecting wires of the dual infrared camera assembly 3. The connecting wires of the dual infrared camera assembly 3 first pass through the cavity inside the suspension connecting frame 2, then enter the C-shaped cavity through the notch, and finally connect to the main board.

[0059] The functional housing 101 has a wire channel on the side near the support leg 12 connected to the power supply box or control box 5. The wire channel is formed by the gaps between several parallel ribs 1011, which not only provides multiple parallel and orderly wiring paths and reduces mutual signal transmission interference, but also enhances the structural strength of the front housing and improves the rigidity and durability of the device.

[0060] like Figure 7As shown, in one optional embodiment, the dual infrared camera assembly 3 includes a hollow support rod 31 and a connecting rod 32. The connecting rod 32 is connected to the bottom end of the suspension connecting frame 2. The support rod 31 is vertically connected to the connecting rod 32 and is horizontally arranged. The support rod 31 has a symmetrical structure, with a camera mounting base at each end. The center distance between the two camera mounting bases is 54 mm to 74 mm. Each camera mounting base is equipped with an infrared camera 33. The two infrared cameras 33 respectively capture images of the left and right eyes of the subject. The two infrared cameras 33 can work independently, allowing only one eye of the subject to be captured.

[0061] An infrared fill light 34 is located on the side of each camera mount to provide additional illumination in low-light or completely dark environments, enabling the infrared camera 33 to capture images of the clean eye. The light emitted by the infrared fill light 34 is infrared light, invisible to the human eye, but can be captured by the infrared camera 33.

[0062] like Figure 5 As shown, the connecting rod 32 is vertically positioned in the middle of the support rod 31, and the infrared fill light 34 is located between the connecting rod 32 and the camera mounting base on the same side. The other end of the connecting rod 32 is hinged to the bottom end of the suspension frame 2, and a fastening bolt 24 is provided at the hinge. The dual infrared camera assembly 3 achieves fine-tuning of the shooting angle through the hinge structure between its connecting rod 32 and the suspension frame 2. Rotating the connecting rod 32 changes the shooting angle of the infrared cameras 33 on both sides of the support rod 31, allowing for shooting at a better desired angle and ultimately obtaining more accurate detection results. After adjusting the rotation angle of the dual infrared camera assembly 3, the fastening bolt 24 is tightened to fix the connecting rod 32 and the suspension frame 2. In this embodiment, the adjustable angle of the dual infrared camera assembly 3 on the suspension frame 2 is 90°. It should be noted that since the infrared cameras 33 are close to the eyes and can already capture eye image data, the angle adjustment here is only a fine-tuning operation based on this, further optimizing the shooting effect.

[0063] The lower surface of the head-mounted device body 1 is equipped with photosensors 16 corresponding to the two infrared cameras 33. Each photosensor 16 is used to sense the infrared light from the infrared camera 33 on the same side. It has a built-in infrared photodiode and an infrared photoresistor, and the resistance value changes with the intensity of the infrared light. The photosensor 16 outputs different current signals. When the angle of the dual infrared camera assembly 3 is adjusted, the elevation angle of the infrared camera 33 changes, and the intensity of the infrared light sensed by the photosensor 16 increases. When the preset value is reached, a signal is sent to the main board indicating that the elevation angle of the infrared camera 33 is appropriate, and the adjustment of the dual infrared camera assembly 3 is stopped.

[0064] like Figure 8As shown, the connecting rod portion 32 is a flat rectangular body with a hollow interior. Its end has a shaft groove 321, which communicates with the inner cavity of the connecting rod portion 32. The bottom of the suspension connecting frame 2 has a rotating shaft 23, the shape of which matches the shaft groove 321. The rotating shaft 23 has a through hole. The rotating shaft 23 is inserted into the shaft groove 321, and a fastening bolt 24 passes through the side wall of the shaft groove 321 and the through hole of the rotating shaft 23, achieving a rotatable connection between the rotating shaft 23 and the shaft groove 321. The rotating shaft 23 is a cylinder. A fan-shaped ring structure is cut off from the side of the cylinder, so that a fan-shaped groove is formed on the side of the cylindrical rotating shaft 23, which serves as the rotation port 233 on the side of the rotating shaft 23. The rotation port 233 has a first abutment surface 231 and abutment surface 232. The first abutment surface 231 and the second abutment surface 232 are parallel to the axis of the rotating shaft 23. The groove edge 3211 on the shaft groove 321, which is parallel to the axial direction, includes a first groove edge and a second groove edge. The first groove edge and the second groove edge correspond to the first abutment surface 231 and the second abutment surface 232, respectively. As the rotating shaft 23 rotates in the shaft groove 321, when the first groove edge contacts the first abutment surface 231, the connecting rod part 32 rotates around the bottom end of the suspension connecting frame 2 to the first limit position; when the second groove edge contacts the second abutment surface 232, the connecting rod part 32 rotates around the bottom end of the suspension connecting frame 2 to the second limit position. The rotation angle of the connecting rod part 32 between the first limit position and the second limit position is an adjustable angle.

[0065] In other alternative embodiments, the adjustable angle of the dual infrared camera assembly 3 on the suspension bracket 2 is 40°, 60° or 120°.

[0066] The outer sides of the two side walls of the shaft groove 321 are respectively provided with a circular groove and a polygonal groove. The fastening bolt 24 is inserted into the shaft groove 321 from one side of the circular groove, then passes through the through hole of the rotating shaft 23, and finally comes out from one side of the polygonal groove. After being tightened with the polygonal nut 25, the fastening is completed. At this time, the polygonal nut 25 is placed in the polygonal groove, and the bolt head of the fastening bolt 24 is placed in the circular groove.

[0067] In this embodiment, a gap 234 is formed between the first contact surface 231 of the rotating opening 233 of the shaft 23 and the front housing 21 of the connecting frame. The connecting wire of the dual infrared camera assembly 3 passes through the hollow support rod 31 and connecting rod 32, and then passes through the gap 234 into the cavity of the suspension connecting frame 2. The first groove edge of the shaft groove 321 is a rounded edge, which can reduce the sharpness of the first groove edge, thereby ensuring that the connecting wire will not be cut during the rotation of the shaft 23 and the shaft groove 321.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An eye fatigue testing device with a nose pad structure, characterized in that, The device includes a head-mounted device body, a suspension frame, and a dual infrared camera assembly. The suspension frame is tilted outward and positioned at the center below the head-mounted device body. The dual infrared camera assembly is located at the bottom end of the suspension frame. The back of the suspension connector is provided with an elastic nose pad, which includes an integrally formed connecting and fixing part and a nose bridge supporting part. The connecting and fixing part is detachably connected to the suspension connector, and the nose bridge supporting part is used to support the nose bridge of the test subject.

2. The eye fatigue testing device with a nose pad structure according to claim 1, characterized in that, The vertical distance from the top back of the suspension connector to the back plate of the head-mounted device body is 5 to 10 millimeters, and the back tilt angle of the suspension connector is 10° to 15°.

3. The eye fatigue testing device with a nose pad structure according to claim 1, characterized in that, The end of the nose bridge support extends to below the nose pads of the test subject's glasses.

4. The eye fatigue testing device with a nose pad structure according to claim 1, characterized in that, The two supporting nose bridge sections are turned outwards, and the outer surfaces of the two supporting nose bridge sections respectively abut against the test subject's eyeglass frame.

5. The eye fatigue testing device with a nose pad structure according to claim 1, characterized in that, The housing of the suspension connector includes a front housing and a back plate. The back plate is provided with a nose pad mounting groove, and the connecting fixing part is detachably installed in the nose pad mounting groove.

6. The eye fatigue testing device with a nose pad structure according to claim 5, characterized in that, The nose pad mounting groove is provided with a number of screw holes, the connecting and fixing part is provided with a strip hole, and a number of round holes are provided in the length direction of the strip hole corresponding to the position of the screw holes, and the width of the round holes is greater than the width of the strip hole.

7. The eye fatigue testing device with a nose pad structure according to claim 5, characterized in that, The front shell of the head-mounted device includes an integrally formed functional part shell and support leg shells located on both sides. The connecting frame front shell is integrally formed at the lower middle of the functional part shell. The back plate of the head-mounted device includes a left support leg back plate, a middle back plate, and a right support leg back plate. The left support leg back plate and the right support leg back plate correspond to the two support leg shells, and the middle back plate corresponds to the functional part shell.

8. The eye fatigue testing device with a nose pad structure according to claim 7, characterized in that, The back panel of the head-mounted device is made of thermoplastic polyurethane, and the surface of the back panel is provided with several rubber pads or silicone pads.

9. The eye fatigue testing device with a nose pad structure according to claim 7, characterized in that, The functional unit housing consists of a top plate, a front plate, and a bottom plate, and the top plate, the front plate, and the bottom plate are all provided with a number of heat dissipation holes.

10. The eye fatigue testing device with a nose pad structure according to claim 7, characterized in that, The inner wall of the front shell is provided with a fastening protrusion near the edge, and the back plate is provided with a fastening hole along the edge. The fastening protrusion and the fastening hole are detachably connected. The inner wall of the front shell is provided with several sets of screw seats, and the back plate is provided with several screw holes corresponding to the screw seats. Screws are inserted into the screw seats through the screw holes to fasten the connection.

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