Non-contact corneal perception meter

Abstract

The utility model discloses a kind of non-contact corneal perception instruments, comprising: base;Mandibular support, mandibular support is connected in base one side;Main body, main body is movably connected in the upper of base, it is equipped with plane driving device between main body and base, plane driving device is used to drive main body relative base horizontal movement, and main body forms detection surface corresponding mandibular support one side;Air nozzle and gas supply device, air nozzle is set corresponding detection surface, and gas supply device is used to air supply to air nozzle;Focusing device, focusing device includes photographic assembly and two symmetrical light sources arranged in the two sides of air nozzle, two sides light source is used to irradiate eye to form reflection point in eye, photographic assembly is used to obtain eye image by shooting, focusing action can be completed by the setting of focusing device, to accurately obtain patient eye center point, to ensure that air nozzle and cornea position corresponding.

Description

Technical Field

[0001] This utility model relates to the field of corneal perception detection technology, and more specifically to a non-contact corneal perception device. Background Technology

[0002] Corneal sensory sensitivity testing is an important indicator of corneal nerve function and ocular surface protection mechanisms. It is widely used to monitor sensory function in systemic and corneal diseases. However, in traditional methods, corneal sensory testing is mostly performed using mechanical pressure. This method cannot accurately measure corneal sensitivity under stimulation thresholds, and the contact measurement itself also carries certain risks.

[0003] In response to this, reference can be made to the prior application with application number 202210489807.0, which discloses a device and method for testing the elastic modulus of the cornea. Specifically, the method involves blowing air onto the cornea using an air blowing device and a nozzle, and taking pictures using a camera to complete the test of the corneal elastic modulus. However, the above device still has the following problems in use: due to the differences in the shape and position of the eyes among different patients, it is necessary to adjust the nozzle to correspond with the position of the cornea. However, the adjustment of the above device is only completed by medical staff through visual observation, which has poor adjustment accuracy and is prone to deviation. Therefore, it needs to be improved. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a non-contact corneal sensor that can provide higher adjustment accuracy for corneal position, so as to ensure the correspondence between the device and the cornea, thereby improving the reliability and accuracy of test results.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A non-contact corneal sensor, comprising:

[0007] Base;

[0008] A chin support, which is connected to one side of the base;

[0009] The main body is movably connected to the base, and a planar driving device is provided between the main body and the base. The planar driving device is used to drive the main body to move horizontally relative to the base, and the main body forms a detection surface on the side corresponding to the chin support.

[0010] An air nozzle and an air supply device are provided, wherein the air nozzle is disposed corresponding to the detection surface and the air supply device is used to supply air to the air nozzle;

[0011] The focusing device includes a camera component and two light sources symmetrically arranged on both sides of the nozzle. The light sources on both sides are used to illuminate the eye to form a reflective point on the eye. The camera component is used to take pictures to obtain an image of the eye.

[0012] As a further improvement of this utility model, the chin support includes a support body and a connecting seat. The connecting seat is connected to the base. The base is provided with an adjusting rod and is connected to the support body through the adjusting rod. The adjusting rod moves up and down relative to the connecting seat to adjust the horizontal height of the support body.

[0013] As a further improvement of this utility model, the connecting seat is provided with a driving source, which is used to connect with the adjusting rod and to drive the adjusting rod to move up and down relative to the connecting seat.

[0014] As a further improvement of this invention, it also includes a response component for allowing the patient to input response data.

[0015] As a further improvement of this utility model, the response component includes a response button.

[0016] As a further improvement of this utility model, the gas supply device includes a gas source, a first three-way valve and a pressure regulating valve. The gas inlet of the first three-way valve is connected to the gas source, and the other two ports of the first three-way valve form an exhaust port and an outlet port, respectively. The pressure regulating valve is connected to the exhaust port and exhausts gas to the outside through the pressure regulating valve. The outlet port is equipped with a solenoid valve and is connected to a gas nozzle through the solenoid valve.

[0017] As a further improvement of this utility model, the gas supply device also includes a second three-way valve, the solenoid valve is connected to the air inlet of the second three-way valve, the other two ports of the second three-way valve form a detection port and a pressure limiting port respectively, and a pressure limiting valve is provided at the pressure limiting port and exhausts gas to the outside through the pressure limiting valve.

[0018] As a further improvement of this utility model, a display component is provided on one side of the main body.

[0019] As a further improvement of this utility model, a first mounting surface and a second mounting surface are respectively formed on the detection surface, the air nozzle and the light source are set corresponding to the first mounting surface, the second mounting surface is inclined relative to the first mounting surface towards the chin support, and the imaging component is set corresponding to the second mounting surface.

[0020] As a further improvement of this utility model, the planar driving device includes a slider, on which a first slide rail and a second slide rail are provided, which are arranged vertically to each other. The slider is connected to the main body through the second slide rail.

[0021] The beneficial effects of this utility model are:

[0022] 1. The focusing device can complete the focusing action, thereby accurately obtaining the center point of the patient's eye to ensure the correspondence between the air nozzle and the cornea.

[0023] 2. By setting up a planar drive device to adjust the relative position of the main body, the focusing device can be used to adjust the relative position of the air nozzle and the human body, thereby further reducing the movement of the patient and improving overall practicality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall installation of this utility model;

[0025] Figure 2 This is a schematic diagram of the rocker arm installation of this utility model;

[0026] Figure 3 This is a schematic diagram of the installation of the planar drive device of this utility model;

[0027] Figure 4 This is a schematic diagram of the installation of the main body of this utility model and the first slide rail;

[0028] Figure 5 This is a schematic diagram of the installation of the drive source of this utility model;

[0029] Figure 6 This is a schematic diagram of the gas supply device connection of this utility model.

[0030] Reference numerals: 1. Base; 2. Chin rest; 3. Main body; 4. Planar drive device; 5. Detection surface; 6. Air nozzle; 7. Air supply device; 8. Focusing device; 9. Photography assembly; 10. Light source; 11. Support body; 12. Connecting seat; 13. Adjusting rod; 14. Drive source; 15. Response assembly; 16. Air source; 17. First three-way valve; 18. Pressure regulating valve; 19. Solenoid valve; 20. Second three-way valve; 21. Pressure limiting valve; 22. Display component; 23. First mounting surface; 24. Second mounting surface; 25. Slider; 26. First slide rail; 27. Second slide rail; 28. Upper chin rest; 29. ​​Pressure stabilizing air tank; 30. Rocker arm. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0032] like Figures 1-6As shown, a non-contact corneal sensor includes a base 1 and a main body 3. The main body 3 is movably connected above the base 1. A planar driving device 4 is provided between the base 1 and the main body 3. The planar driving device 4 is used to drive the main body 3 to move horizontally relative to the base 1. Specifically, the planar driving device 4 includes a slider 25, a first slide rail 26, and a second slide rail 27. The first slide rail 26 and the second slide rail 27 are staggered vertically and are relatively perpendicular to each other. The slider 25 slides and connects to the first slide rail 26 and the second slide rail 27 respectively. The slider 25 slides relative to the second slide rail 27, while the first slide rail 26 slides relative to the slider 25. This forms a guide rail slider 25 mechanism with the first slide rail 26 and the second slide rail 27. The mechanism can be driven by a motor or an air pump. This part is prior art and will not be described in detail here. The slider 25 is connected to the main body 3 through the second slide rail 27, thereby realizing the horizontal movement of the main body 3.

[0033] Furthermore, the main body 3 is provided with a rocker arm 30, the lower end of which forms a detection end. In use, the operator holds the rocker arm 30 to drive it to swing, thereby sensing through the detection end to control the relative movement of the slider 25 or the first slide rail 26.

[0034] Furthermore, the chin support 2 is connected to one side of the base 1, and the main body 3 forms a detection surface 5 on one side of the chin support 2. The chin support 2 is used to support the patient's chin so that the patient's face faces the detection surface 5.

[0035] Specifically, the chin support 2 includes a support body 11 and a connecting seat 12. The connecting seat 12 is fixed to the base 1. The connecting seat 12 is provided with an adjusting rod 13 and is connected to the support body 11 through the adjusting rod 13. The adjusting rod 13 moves up and down relative to the connecting seat 12 to adjust the horizontal height of the support body 11, thereby adjusting the position of the patient's chin.

[0036] In one embodiment, the adjusting rod 13 is threadedly connected to the base 1, allowing the operator to manually rotate the adjusting rod 13 to raise or lower it. In another embodiment, the connecting seat 12 is provided with a drive source 14, which is connected to the adjusting rod 13 and used to drive the adjusting rod 13 to move up and down relative to the connecting seat 12. The drive source 14 includes a cylinder and a motor. In this embodiment, the drive source 14 is preferably a cylinder, and the output end of the cylinder is connected to the adjusting rod 13 to drive the adjusting rod 13 to move up and down.

[0037] Furthermore, the connecting seat 12 is provided with a forehead support 28, and the two ends of the forehead support 28 are provided with limiting frames and are connected to the connecting seat 12 through the limiting frames. When in use, when the patient's chin is placed on the chin support 2, the forehead support 28 can naturally abut against the patient's forehead to fix the patient's head, thereby greatly improving the stability of the patient's head.

[0038] It also includes an air nozzle 6 and an air supply device 7. The air nozzle 6 is set to the detection surface 5 and emits air towards the chin support 2. The air supply device 7 is used to supply air to the air nozzle 6. The air outlet method of the air nozzle 6 can realize non-contact corneal perception detection for patients, thereby greatly reducing the risk of infection and damage.

[0039] Specifically, the operator can spray airflow of different pressures to the patient's cornea according to the nozzle 6, and use the limit method to obtain the patient's corneal limit perception value, thereby realizing the detection of multiple senses such as mechanical and temperature on the corneal surface.

[0040] Furthermore, in order to meet different testing needs, in this embodiment, the air nozzle 6 is detachable. The detachability includes thread or plug connection. In this embodiment, the thread is used to achieve the purpose of replacing the air nozzle 6. During actual operation, the operator can change the size of the air nozzle 6 to meet the needs of different testing ranges. In particular, the small-diameter air nozzle 6 can test different positions of the cornea to improve overall practicality.

[0041] It is foreseeable that the shape of the air nozzle 6 can be any shape of the air nozzle 6 in the prior art, including cylindrical and horn-shaped, etc.

[0042] Furthermore, a control component can be provided on the air supply device 7 to adjust the temperature of the airflow output from the nozzle, thereby further improving the detection range of the cornea. The control component can be any temperature control device in the prior art. In this embodiment, it is specifically a heating wire. In other ways, temperature control can also be achieved by means of semiconductor control.

[0043] Specifically, the air supply device 7 includes an air source 16, a first three-way valve 17, and a pressure regulating valve 18. The air supply device 7 is installed inside the main body 3. In one embodiment, the air source 16 can be externally connected. In this embodiment, the air source 16 is an air pump built into the main body 3. The air pressure value it sprays is adjustable. Specifically, it is controlled by adjusting the duty cycle of the PWM signal through a built-in PWM signal adjustment module. The air inlet of the first three-way valve 17 is connected to the air source 16. In order to improve the stability of the overall air circuit, a pressure stabilizing tank 29 is provided between the first three-way valve 17 and the air source 16. The other two ports of the first three-way valve 17 form an exhaust port and an outlet, respectively. The pressure regulating valve 18 is connected to the exhaust port and exhausts air outward through the pressure regulating valve 18, thereby realizing the adjustment of the air pressure in the air circuit. The outlet is equipped with a solenoid valve 19 and is connected to the air nozzle 6 through the solenoid valve 19. The setting of the solenoid valve 19 can greatly improve the air pressure accuracy of the air nozzle 6.

[0044] Furthermore, in order to improve gas cleanliness, in this embodiment, a gas filter is connected to the gas source 16 input terminal. This gas filter is existing technology and will not be described in detail here. Preferably, it is a device with built-in removable filter cotton to filter dust impurities and some bacteria in the gas, thereby improving the overall cleanliness of the gas.

[0045] In other ways, the gas filter can also be set in other locations in the gas path, including between the gas source 16 and the first three-way valve 17, between the first three-way valve 17 and the solenoid valve 19, or between the solenoid valve 19 and the gas nozzle 6. Any other solution that can filter the airflow from the gas nozzle 6 should also be included.

[0046] Furthermore, to improve the stability of the overall gas pressure in the gas circuit and enhance operational safety, the gas supply device 7 also includes a second three-way valve 20. The solenoid valve 19 is connected to the inlet of the second three-way valve 20. The other two ports of the second three-way valve 20 form a detection port and a pressure limiting port, respectively. A data acquisition module is set at the detection port to collect the gas pressure data at the detection port, thereby realizing the acquisition of real-time gas pressure data in the gas circuit. A pressure limiting valve 21 is set at the pressure limiting port, and exhaust is discharged outward through the pressure limiting valve 21. The setting of the pressure limiting port can control the maximum value of the gas pressure in the gas circuit to ensure overall operational safety.

[0047] Furthermore, in order to achieve accurate focusing on the patient's eye position, the main body 3 is equipped with a focusing device 8, which includes a camera component 9 and two light sources 10 symmetrically arranged on both sides of the air nozzle 6. The camera component 9 is specifically a camera. The light sources 10 on both sides are used to illuminate the eye to form a reflective point on the eye. The camera component 9 is used to take pictures to obtain an image of the eye. The operator then adjusts the position of the chin rest 2 and the main body 3 according to the image of the eye to complete the correspondence between the air nozzle 6 and the cornea.

[0048] Specifically, a first mounting surface 23 and a second mounting surface 24 are formed on the detection surface 5. The air nozzle 6 and the light source 10 are set corresponding to the first mounting surface 23. The second mounting surface 24 is tilted relative to the first mounting surface 23 towards the chin support 2. The imaging component 9 is set corresponding to the second mounting surface 24. Due to the tilting of the second mounting surface 24, the position of the imaging component 9 can be adjusted, thereby facilitating the acquisition of eye images by the imaging component 9.

[0049] Furthermore, it also includes a response component 15, which is used for the patient to input response data to facilitate the collection of patient data under multiple different barometric pressure tests. In one embodiment, the response component 15 is any sound detection component in the prior art, specifically, the patient emits a predetermined sound to complete the response data input. In two embodiments, the response component 15 is a response button, and the patient presses different buttons to complete the response data input.

[0050] Furthermore, a display component 22 is provided on one side of the main body 3. The display component 22 is specifically a display screen. The display component 22 facilitates the operator to focus and adjust, and also facilitates the operator to view the response data.

[0051] The implementation principle of a non-contact corneal sensor according to an embodiment of this application is as follows: The patient places their chin on the chin rest 2 and their forehead in contact with the forehead rest 28, thereby fixing the patient's face. Two light sources 10 emit light to form a reflective point on the patient's eye. Simultaneously, a photographic device records the eye image in real time. The operator adjusts the relative position of the chin rest 2 and the main body 3 based on the eye image to complete the focusing action, ensuring that the nozzle 6 corresponds to the cornea, with a 5mm gap between the nozzle 6 and the cornea. The nozzle 6 then ejects airflow, and the patient responds through the response component 15. The patient's corneal limit perception data can be obtained using either the dichotomy method or the limit method to complete the detection.

[0052] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A non-contact corneal sensor, characterized in that, include: Base (1); A chin support (2) is connected to one side of a base (1); The main body (3) is movably connected above the base (1). A planar driving device (4) is provided between the main body (3) and the base (1). The planar driving device (4) is used to drive the main body (3) to move horizontally relative to the base (1). The main body (3) forms a detection surface (5) on the side corresponding to the chin support (2). An air nozzle (6) and an air supply device (7) are provided, wherein the air nozzle (6) is provided corresponding to the detection surface (5), and the air supply device (7) is used to supply air to the air nozzle (6); The focusing device (8) includes a camera component (9) and two light sources (10) symmetrically arranged on both sides of the nozzle (6). The light sources (10) on both sides are used to illuminate the eye to form a reflective point on the eye. The camera component (9) is used to take pictures to obtain an image of the eye.

2. The non-contact corneal sensor according to claim 1, characterized in that, The chin support (2) includes a support body (11) and a connecting seat (12). The connecting seat (12) is connected to the base (1). The base (1) is provided with an adjusting rod (13) and the support body (11) is connected through the adjusting rod (13). The adjusting rod (13) moves up and down relative to the connecting seat (12) to adjust the horizontal height of the support body (11).

3. A non-contact corneal sensor according to claim 2, characterized in that, The connecting seat (12) is provided with a driving source (14), which is used to connect with the adjusting rod (13) and to drive the adjusting rod (13) to move up and down relative to the connecting seat (12).

4. A non-contact corneal sensor according to claim 1, characterized in that, It also includes a response component (15) for the patient to input response data.

5. A non-contact corneal sensor according to claim 4, characterized in that, The response component (15) includes a response button.

6. A non-contact corneal sensor according to claim 1, characterized in that, The gas supply device (7) includes a gas source (16), a first three-way valve (17) and a pressure regulating valve (18). The inlet of the first three-way valve (17) is connected to the gas source (16). The other two ports of the first three-way valve (17) form an exhaust port and an outlet, respectively. The pressure regulating valve (18) is connected to the exhaust port and exhausts gas to the outside through the pressure regulating valve (18). The outlet is equipped with a solenoid valve (19) and is connected to the air nozzle (6) through the solenoid valve (19).

7. A non-contact corneal sensor according to claim 6, characterized in that, The gas supply device (7) also includes a second three-way valve (20). The solenoid valve (19) is connected to the air inlet of the second three-way valve (20). The other two ports of the second three-way valve (20) form a detection port and a pressure limiting port, respectively. A pressure limiting valve (21) is provided at the pressure limiting port and exhausts gas to the outside through the pressure limiting valve (21).

8. A non-contact corneal sensor according to claim 1, characterized in that, A display component (22) is provided on one side of the main body (3).

9. A non-contact corneal sensor according to claim 1, characterized in that, The detection surface (5) is formed with a first mounting surface (23) and a second mounting surface (24). The air nozzle (6) and the light source (10) are set on the first mounting surface (23). The second mounting surface (24) is inclined relative to the first mounting surface (23) towards the chin support (2). The imaging component (9) is set on the second mounting surface (24).

10. A non-contact corneal sensor according to claim 1, characterized in that, The planar driving device (4) includes a slider (25), on which a first slide rail (26) and a second slide rail (27) are arranged vertically. The first slide rail (26) and the second slide rail (27) are arranged perpendicularly to each other. The slider (25) is connected to the main body (3) through the second slide rail (27).

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