Head-mounted eyestrain testing device compatible with glasses

Abstract

The utility model relates to a head-mounted eyestrain testing device compatible with glasses, which comprises a head-mounted device main body, and the head-mounted device main body is connected with a rotatable double-infrared camera component through a suspension connecting frame; a gap is reserved between the back face of the top end of the suspension connecting frame and a back plate of the head-mounted device body, and earpiece embedding grooves are formed in the lower portions of the inner sides of the supporting legs on the two sides. A gap is reserved from the back surface of the top end of the suspension connecting frame below the head-mounted device main body to the back plate of the head-mounted device main body, so that the gap is enough to accommodate the frame of the glasses; the earpiece embedding grooves are formed in the lower portions of the inner sides of the supporting legs of the head-mounted device body, the tops of the earpieces of a testee can be placed in the earpiece embedding grooves, the supporting legs make contact with the tops of the auricles of the testee, therefore, the supporting area of the supporting legs of the device is large, the testee does not feel uncomfortable in the ears even if the head-mounted device is worn for a long time, and the user experience is improved. The head-mounted eyestrain testing device can be well compatible with glasses for use.

Description

Technical Field

[0001] This utility model relates to the field of eye testing devices, specifically to a head-mounted eye fatigue testing device compatible with eyeglasses. 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] Drawing inspiration from eye trackers, people have come up with the idea of ​​attaching infrared cameras to head-mounted devices, allowing the infrared cameras to take close-up photos of the eyes while the device is worn, thus solving the problem of inconvenient use of eye fatigue testing devices.

[0005] However, for users who already wear glasses, they need to remove them; otherwise, the temples of the head-mounted device will press against the temples of the glasses, and the small contact point can cause discomfort to the user's ears. Therefore, there is an urgent need to develop an eye fatigue testing device that is compatible with glasses, allowing test subjects to perform eye fatigue tests without removing their glasses.

[0006] The above problems are worth solving. Utility Model Content

[0007] To address the issue that existing head-mounted eye fatigue testing devices are incompatible with eyeglasses, this invention provides a head-mounted eye fatigue testing device that is compatible with eyeglasses.

[0008] The technical solution of this utility model is as follows:

[0009] A head-mounted eye fatigue testing device compatible with eyeglasses, characterized in that it includes a head-mounted device body, the head-mounted device body including a core functional part located in the middle and support legs located on both sides, a suspension connecting frame is inclinedly arranged below the core functional part, and a rotatable dual infrared camera assembly is provided at the bottom end of the suspension connecting frame.

[0010] A gap is left between the top back of the suspension connector and the back plate of the head-mounted device body, and eyeglass temple insert grooves are provided on the lower inner side of the two legs.

[0011] According to the above-described solution, the present invention is characterized in that the eyeglass temple embedding groove includes a strip groove and an arc groove, the strip groove is used to embed into the top of the eyeglass temple, and the arc groove is used to avoid the top of the subject's auricle.

[0012] According to the above-described scheme, the present utility model is characterized in that the end of the support leg is provided with a through loop, and the through loops of the two support legs are respectively connected to the two ends of the elastic band.

[0013] According to the above-described scheme, the present utility model is characterized in that the end of one side of the support leg of the head-mounted device is provided with a TYPE-C interface or a USB interface.

[0014] According to the above-described scheme, the present utility model is characterized in that the housing of the head-mounted device body includes a front shell and a back plate. The front shell includes an integrally formed functional part shell, two side support shells, and a connecting frame front shell. The two support shells are located on both sides of the functional part shell, and the connecting frame front shell is located in the lower middle of the functional part shell. The back plate includes a left support back plate, a middle back plate, a right support back plate, and a connecting frame back plate. The left support back plate and the right support back plate correspond to the two support shells, the middle back plate corresponds to the functional part shell, and the connecting frame back plate corresponds to the connecting frame front shell.

[0015] Furthermore, the support body housing with a TYPE-C interface or USB interface on one side has a flexible circuit board on the inner side of its top wall, and the flexible circuit board connects the main board and the TYPE-C interface board or USB interface board.

[0016] Furthermore, the functional unit housing has a wire-embedded channel on the side near the support foot with a TYPE-C interface or USB interface, and the connection line between the flexible circuit board and the main board is arranged in the wire-embedded channel.

[0017] Furthermore, both the left and right support back plates are provided with the eyeglass temple insertion grooves.

[0018] Furthermore, the junction between the functional part housing and the support leg housing has an arc-shaped transition section; the middle back plate, the left support leg back plate, and the right support leg back plate are all arc-shaped.

[0019] Furthermore, the surface of the back plate is provided with several rubber pads or silicone pads.

[0020] The advantages of this utility model based on the above solution are as follows:

[0021] The head-mounted device of this utility model has a suspension connecting frame at the bottom of the main body. The dual infrared camera components are installed through the suspension connecting frame, and there is a gap between the top back of the suspension connecting frame and the back plate of the head-mounted device main body, so that there is enough space to accommodate the eyeglass frame; the inner side of the lower part of the support leg of the head-mounted device main body is provided with an eyeglass temple embedding groove.

[0022] When the test subject wears the device of this utility model, the top of the test subject's glasses temple can be inserted into the eyeglass temple embedding groove, and the device's foot also contacts the top of the test subject's ear. Therefore, the support area of ​​the device's foot is large, and even if worn for a long time, the test subject will not feel ear discomfort. It can be seen that the head-mounted eye fatigue testing device of this utility model can be well compatible with glasses. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a partial structural schematic diagram of the present invention;

[0025] Figure 3 This is a diagram showing the usage state of this utility model;

[0026] Figure 4 This is an exploded view of the shell structure of this utility model;

[0027] Figure 5 This is an exploded view of the suspension connecting frame of this utility model;

[0028] Figure 6 for Figure 5 Enlarged view of section A;

[0029] Figure 7 This is a partial schematic diagram of the back of the present invention.

[0030] In the diagram,

[0031] 1. Main body of the head-mounted device;

[0032] 11. Core functional unit; 12. Leg; 121. Through-ring; 122. Eyeglass temple insert slot; 13. TF card slot; 14. TOF sensor; 15. Elastic band; 16. Light sensor; 101. Functional unit housing; 1011. Rib; 102. Leg housing; 103. Left leg back plate; 104. Middle back plate; 1041. Rubber pad; 105. Right leg back plate;

[0033] 2. Suspension connecting frame;

[0034] 21. Front housing of connecting frame; 22. Back plate of connecting frame; 23. Rotating shaft; 231. First abutment surface; 232. Second abutment surface; 233. Rotation opening; 234. Gap; 24. Fastening bolt; 25. Polygonal nut;

[0035] 3. Dual infrared camera assembly;

[0036] 31. Support rod; 32. Connecting rod; 321. Shaft groove; 3211. Groove edge; 33. Infrared camera; 34. Infrared supplementary light;

[0037] 4. Elastic nose pads;

[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. "A plurality of" means two or more, unless otherwise expressly and specifically defined.

[0044] like Figures 1 to 3 As shown, a head-mounted eye fatigue testing device compatible with eyeglasses includes a head-mounted device body 1. The head-mounted device body 1 includes a core functional unit 11 located in the middle and support legs 12 located on both sides. The core functional unit 11 has a built-in main board. A suspension connecting frame 2 is inclinedly arranged below the core functional unit 11, and a rotatable dual infrared camera assembly 3 is provided at the bottom end of the suspension connecting frame 2. The head-mounted device body 1 can be detachably worn on the forehead of the test subject. The other end of the suspension connecting frame 2 extends downwards and outwards from the test subject's eyes, and 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.

[0045] A gap of 5 to 10 millimeters is left between the top back of the suspension connector 2 and the back plate of the head-mounted device body 1, providing sufficient space to accommodate the eyeglasses 6 frame. An elastic nose pad 4 is installed on the back of the suspension connector 2, supporting the suspension connector 2 on the subject's nose bridge, which improves the stability of the device during wear. The elastic nose pad 4 is also soft, enhancing wearing comfort. The inner lower sides of the two side feet 12 have eyeglasses 6 temple insertion slots 122.

[0046] In a preferred embodiment, the back tilt angle α of the suspension connector 2 is 10° to 15°. Combined with the gap structure between the top back of the suspension connector 2 and the back plate of the head-mounted device body 1, the suspension connector 2 is tilted at a certain distance away from the subject at its top, so as to ensure that the suspension connector 2 will not bump the subject's nose bridge even at a small tilt angle.

[0047] The temple insert 122 is composed of a strip groove and an arc groove. The top of the subject's temple can be placed in the strip groove, while the arc groove can avoid the top of the subject's auricle. When the subject wearing glasses 6 wears the device of this embodiment, the foot 12 of the headband device body 1 is fitted with the temple through the temple insert 122, and the foot 12 of the device is in contact with the top of the subject's auricle. Therefore, the device is in contact with both the temple and the subject's ear. The support area of ​​the device foot is large and the pressure of the device weight is small. Even if worn for a long time, the subject will not feel pain above the ear.

[0048] In this embodiment, the temple insert grooves 122 are provided on the left temple back plate 103 and the right temple back plate 105. The left temple back plate 103 is provided with a temple insert groove 122 for the left temple of the glasses 6, and the right temple back plate 105 is provided with a temple insert groove 122 for the right temple of the glasses 6. During processing, the temple insert grooves 122 are formed on the left temple back plate 103 and the right temple back plate 105 respectively using a compression molding process.

[0049] 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 the elastic band 15. The elastic band 15 is provided with an adjustment ring, which can be used to adjust 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.

[0050] like Figure 4 As shown, the main body 1 of the head-mounted device includes a front shell and a back plate. The front shell includes an integrally formed functional part shell 101, two side support leg shells 12, and a connecting frame front shell 21. The two support leg shells 12 are located on both sides of the functional part shell 101, and the connecting frame front shell 21 is located in the lower middle of the functional part shell 101. The back plate includes a left support leg back plate 103, a middle back plate 104, a right support leg back plate 105, and a connecting frame back plate 22. The left support leg back plate 103 and the right support leg back plate 105 correspond to the two support leg shells 102, the middle back plate 104 corresponds to the functional part shell 101, and the connecting frame back plate 22 corresponds to the connecting frame front shell 21.

[0051] 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.

[0052] The foot housing 102, which has a support leg with a TYPE-C or USB interface, has a flexible circuit board on its inner top wall. The flexible circuit board connects the main board and the TYPE-C or USB interface board. The functional housing 101 has a cable tray near the support leg 12 with the TYPE-C or USB interface. The connection wires between the flexible circuit board and the main board are located within the cable tray. The cable tray is formed by the gaps between several parallel ribs 1011, which not only provides multiple parallel and orderly wiring paths, reducing signal transmission interference, but also enhances the structural strength of the front housing, improving the rigidity and durability of the device.

[0053] In this embodiment, the junction of the functional housing 101 and the support housing 102 has an arc transition housing section. The arc transition housing section is used to disperse stress and reduce stress concentration caused by hard corners, thereby improving the overall structural strength. The smooth arc transition also helps to make the entire device look more integrated and beautiful.

[0054] The central backplate 104, left support leg backplate 103, and right support leg backplate 105 are all arc-shaped. The two ends of the central backplate 104 extend to the junction of the functional housing 101 and the support leg housing 102, while the left support leg backplate 103 and right support leg backplate 105 only cover the corresponding side of the support leg housing 102. This rounded transition reduces pressure on the user's forehead from sharp angles, improving wearing comfort. The backplate is preferably made of thermoplastic polyurethane, which has good elasticity and flexibility, strong wear resistance, and a long service life. The surface of the central backplate is provided with several rubber pads 1041 or silicone pads to provide greater elasticity and further enhance the wearing comfort of the device.

[0055] like Figure 5 and Figure 6 As 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.

[0056] like Figure 7 As shown, each camera mount has an infrared fill light 34 on its side to provide additional illumination in low-light or completely dark environments, enabling the infrared camera 33 to capture images of the cleaned 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.

[0057] 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 to 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 merely a fine-tuning operation to further optimize the shooting effect.

[0058] 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.

[0059] like Figure 6As 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.

[0060] In other alternative embodiments, the adjustable angle of the dual infrared camera assembly 3 on the suspension bracket 2 is 40°, 60° or 120°.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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. A head-mounted eye fatigue testing device compatible with eyeglasses, characterized in that, The device includes a head-mounted device body, which includes a core functional part located in the middle and support legs located on both sides. A suspension connecting frame is inclinedly arranged below the core functional part, and a rotatable dual infrared camera assembly is provided at the bottom end of the suspension connecting frame. A gap is left between the top back of the suspension connector and the back plate of the head-mounted device body, and eyeglass temple insert grooves are provided on the lower inner side of the two legs.

2. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 1, characterized in that, The eyeglass temple insert groove includes a strip groove and an arc groove. The strip groove is used to insert into the top of the eyeglass temple, and the arc groove is used to avoid the top of the subject's auricle.

3. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 1, characterized in that, The end of each support leg is provided with a loop, and the loops of the two supports legs are respectively connected to the two ends of the elastic band.

4. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 1, characterized in that, The head-mounted device has a TYPE-C or USB interface at the end of one of its support legs.

5. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 1, characterized in that, The main body of the head-mounted device includes a front shell and a back plate. The front shell includes an integrally formed functional part shell, two side support shells, and a connecting frame front shell. The two support shells are located on both sides of the functional part shell, and the connecting frame front shell is located in the lower middle of the functional part shell. The back plate includes a left support back plate, a middle back plate, a right support back plate, and a connecting frame back plate. The left support back plate and the right support back plate correspond to the two support shells, the middle back plate corresponds to the functional part shell, and the connecting frame back plate corresponds to the connecting frame front shell.

6. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 5, characterized in that, The support body housing has a support foot with a TYPE-C interface or a USB interface on one side, and a flexible circuit board is provided on the inner side of its top wall. The flexible circuit board connects the main board and the TYPE-C interface board or the USB interface board.

7. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 6, characterized in that, The functional unit housing has a wire-embedded channel on the side near the support feet with TYPE-C or USB interfaces, and the connection line between the flexible circuit board and the main board is located in the wire-embedded channel.

8. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 5, characterized in that, Both the left and right support back plates are provided with the eyeglass temple insertion grooves.

9. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 5, characterized in that, The junction between the functional part housing and the support leg housing has an arc-shaped transition section; the middle back plate, the left support leg back plate, and the right support leg back plate are all arc-shaped.

10. The head-mounted eye fatigue testing device compatible with eyeglasses according to claim 5, characterized in that, The surface of the back plate is provided with several rubber pads or silicone pads.

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