Orthokeratology lens double-sided processing device based on plasma jet

Abstract

The invention belongs to the technical field of material surface treatment, and particularly relates to an orthokeratology lens double-sided treatment device based on plasma jet. The double-sided jet flow design is adopted, discharge is conducted in the gap between the two dielectric pipes through dielectric barrier discharge, gas flows outwards after ionization, and plasma jet flow is formed between the dielectric pipes. Due to the fact that the orthokeratology lens is adsorbed to the bottom of the air suction pipe under the action of the air suction pump, gas is sprayed out of the middle medium pipe along with the plasma jet flow, the concave face and the convex face of the orthokeratology lens can be processed at the same time, and high efficiency of processing is guaranteed. The surface of the lens can be activated, the adhesive force and hydrophilicity are improved, thermal damage or mechanical damage cannot be caused to the surface of the orthokeratology lens, and the integrity and precision of the orthokeratology lens are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of material surface treatment, and in particular relates to a double-sided treatment device for orthokeratology lenses based on plasma jets. Background Art

[0002] In recent years, plasma technology, as a cutting-edge and efficient means, has shown extensive application potential and remarkable results in many scientific and industrial fields, including material surface modification. Plasma technology, with its simple operation, fast processing speed, significant modification effect, low environmental pollution and low energy consumption, can not only effectively improve the surface properties of materials, but also give them new properties while maintaining the bulk properties of the materials, thereby greatly broadening the scope of application of materials. Therefore, plasma technology has great application prospects and extremely high practical value in material surface modification. Dielectric barrier discharge plasma, as an important plasma generation method, is rich in a large number of high-energy active components, such as high-energy electrons, ions, free radicals and excited molecules. When these high-energy active components interact with the surface of the material, they can trigger a series of physical and chemical reactions. These reactions can not only change the chemical composition of the material surface, but also have a significant impact on its physical morphology, such as significantly improving the hydrophilicity of the material, making its surface easier to wet and adhere; at the same time, it can also enhance the adhesion of the material and improve the bonding strength with other materials; in addition, plasma technology can also effectively improve the biocompatibility of the material, making it have a wider application prospect in the biomedical field.

[0003] The Chinese patent document with publication number CN221264039U discloses a plasma jet generating device and a contact lens care device capable of improving discharge stability. When performing surface treatment of orthokeratology lenses, the device moves the orthokeratology lenses that need plasma care on the workstation to the care position, so that these orthokeratology lenses are bombarded by the plasma jet generated by the discharger in turn, and perform plasma care to remove pollutants and oxide layers on the lens surface, thereby activating the lens surface. However, the device can only perform single-sided treatment on the orthokeratology lenses during treatment, and cannot simultaneously treat the concave and convex surfaces of the orthokeratology lenses.

[0004] The Chinese patent document with publication number CN213852278U discloses a device for plasma sterilization and biocompatibility improvement of corneal contact lenses, which uses an external electrode to form a low pressure in a quartz glass cavity through a vacuum device to generate plasma. The device can be controlled by different processes to achieve the effect of sterility and improved biocompatibility. The device places the lens to be treated in a disinfection box. Although double-sided treatment can be achieved in a vacuum environment, it needs to maintain a vacuum environment when treating orthokeratology lenses, which is inconvenient to operate and has a relatively low treatment efficiency.

[0005] In view of this, the inventor hopes to design a double-sided treatment device for orthokeratology lenses based on plasma jet, which can effectively overcome many limitations in the prior art: under atmospheric pressure conditions, plasma can only perform single-sided treatment on the surface of orthokeratology lenses, and cannot perform double-sided treatment; under vacuum conditions, although plasma can achieve double-sided treatment on the surface of orthokeratology lenses, it is necessary to maintain a vacuum environment when performing orthokeratology lens treatment, which is inconvenient to operate and has relatively low treatment efficiency. Summary of the invention

[0006] The purpose of the present invention is to overcome the problem in the prior art of inconvenience in operating when both sides of a corneal reshaping lens are processed simultaneously under vacuum conditions, and to provide a double-sided processing device for a corneal reshaping lens based on a plasma jet. By designing a reasonable plasma jet device structure, it is possible to achieve simultaneous processing of the concave and convex surfaces of the corneal reshaping lens under atmospheric pressure conditions.

[0007] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a double-sided treatment device for orthokeratology lenses based on plasma jet, comprising a high-voltage bipolar AC power supply, a gas cylinder, a gas flow meter, a first solenoid valve, an upper discharger, orthokeratology lenses, a treatment table, a lower discharger, a second solenoid valve and an air suction pump;

[0009] The upper end of the upper discharger is provided with a first cannula with a built-in first needle electrode, the two sides of the upper discharger are provided with a first gas inlet interface and a suction interface respectively, and the lower part of the upper discharger is provided with a first through pipe and suction pipes distributed in a ring array around the first through pipe;

[0010] A second cannula with a built-in second needle electrode is installed at the lower end of the lower discharger, a second gas inlet interface is provided on one side of the lower discharger, and a second through-tube is installed on the upper part of the lower discharger;

[0011] The output end of the gas cylinder is connected to the first gas inlet interface on the side of the upper arrester and the second gas inlet interface on the side of the lower arrester through a branch pipe, and a gas flow meter and a first solenoid valve are installed on the main pipe of the branch pipe in sequence;

[0012] The processing platform is arranged between the upper discharger and the lower discharger, and a plurality of through holes for placing orthokeratology lenses are provided on the processing platform;

[0013] The air suction interface is connected to the air suction pump through a gas pipeline, and a second solenoid valve is installed on the gas pipeline;

[0014] The suction interface can adsorb the orthokeratology lens onto the suction tube through the suction pump; the high-voltage bipolar AC power supply is respectively connected to the first needle electrode in the first cannula and the second needle electrode in the second cannula, and a plasma jet is generated through dielectric barrier discharge; since the orthokeratology lens is adsorbed on the suction tube, the plasma jet under the processing table can pass through its through hole and act on the surface of the orthokeratology lens, thereby realizing simultaneous double-sided processing of the orthokeratology lens.

[0015] Furthermore, in the above-mentioned orthokeratology lens double-sided processing device, the processing platform is installed on the movable part of the moving mechanism, and the moving mechanism is provided with a motor for driving the displacement of its movable part.

[0016] Furthermore, the above-mentioned orthokeratology lens double-sided processing device also includes a controller, and the controller is respectively connected to the first solenoid valve, the second solenoid valve and the motor.

[0017] Furthermore, in the above-mentioned orthokeratology lens double-sided processing device, the high-voltage bipolar AC power supply is connected to the first needle electrode and the second needle electrode through an electrode line interface, and the voltage of the high-voltage bipolar AC power supply is 1 to 50 kV.

[0018] Furthermore, in the above-mentioned orthokeratology lens double-sided processing device, the first insert tube, the first through tube, the second insert tube, and the second through tube are all cylindrical transparent tubes made of high-purity quartz.

[0019] Furthermore, in the above-mentioned orthokeratology lens double-sided processing device, the air intake tube is a cylindrical transparent tube made of high-purity quartz, with a length of 25 mm, an outer diameter of 2 mm, and a wall thickness of 0.3 mm.

[0020] Furthermore, in the above-mentioned orthokeratology lens double-sided processing device, the distance between the processing platform and the upper discharger is 6 mm, and the distance between the processing platform and the lower discharger is 10 to 20 mm.

[0021] Furthermore, in the above-mentioned orthokeratology lens double-sided processing device, the gas stored in the gas cylinder is argon. Choosing argon as the reaction gas, on the one hand, the plasma generated after ionization will not chemically react with the base material, and on the other hand, it helps to maintain the stability of plasma discharge.

[0022] Furthermore, in the above-mentioned orthokeratology lens double-sided processing device, the controller is a master command device capable of controlling the start, speed regulation, braking and reversal of the first solenoid valve, the second solenoid valve and the motor in a predetermined order.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention integrates the suction component in the discharger, and the suction tube adopts a cylindrical transparent tube made of quartz. When in use, the orthokeratology lens is placed with the concave surface facing up in the through hole of the processing table, and the suction pump is turned on. The suction force generated by the suction pump is used to firmly adsorb the orthokeratology lens to the bottom of the suction tube, which is convenient for subsequent processing operations of the orthokeratology lens and simplifies the processing flow.

[0025] 2. The present invention adopts a double-sided jet design, and discharges in the gap between two dielectric tubes through dielectric barrier discharge. The gas flows outward after ionization, forming a plasma jet between the dielectric tubes. Since the orthokeratology lens is adsorbed at the bottom of the suction tube under the action of the suction pump, and the gas in the middle dielectric tube is ejected with the plasma jet, the concave and convex surfaces of the orthokeratology lens can be processed simultaneously, ensuring the high efficiency of the processing.

[0026] 3. The present invention utilizes the advantage of high energy conversion efficiency using dielectric barrier discharge technology, which is more efficient than traditional methods. At the same time, it can activate the lens surface, improve adhesion and hydrophilicity, and will not cause thermal or mechanical damage to the surface of the orthokeratology lens, thus ensuring the integrity and accuracy of the orthokeratology lens.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0030] Figure 2 It is a front view schematic diagram of the upper discharger cavity and the internal structure of the present invention;

[0031] Figure 3 It is a side view schematic diagram of the upper discharger cavity and internal structure in the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the plasma jet source of the double DBD in the present invention;

[0033] Figure 5 It is a front view schematic diagram of the lower discharger cavity and the internal structure of the present invention;

[0034] Figure 6 is a processing flow chart of orthokeratology lenses in the present invention;

[0035] Figure 7 It is a schematic diagram of the effect of plasma jet treatment in the present invention;

[0036] Figure 8 It is a schematic diagram of the effect of plasma jet treatment in the present invention;

[0037] In the accompanying drawings, the reference numerals of the various components are as follows:

[0038] 1-high-voltage bipolar AC power supply, 2-gas cylinder, 3-gas flowmeter, 4-first solenoid valve, 5-first needle electrode, 6-first cannula, 7-first gas inlet interface, 8-upper discharger, 9-inhalation interface, 10-inhalation tube, 101-first inhalation tube, 102-second inhalation tube, 103-third inhalation tube, 104-fourth inhalation tube, 105-fifth inhalation tube, 106-sixth inhalation tube, 107-sleeve, 11-first through tube, 12-corneal reshaping lens, 13-treatment table, 14-moving mechanism, 15-motor, 16-second through tube, 17-lower discharger, 18-second gas inlet interface, 19-second cannula, 20-second needle electrode, 21-second solenoid valve, 22-inhalation pump, 23-controller. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figure 1-Figure 8 As shown, this embodiment provides a double-sided processing device for corneal reshaping lenses based on plasma jet, including a high-voltage bipolar AC power supply 1, a gas cylinder 2, a gas flow meter 3, a first solenoid valve 4, an upper discharger 8, a corneal reshaping lens 12, a processing table 13, a lower discharger 17, a second solenoid valve 21 and an air suction pump 22.

[0041] In this embodiment, the upper end of the upper discharger 8 is equipped with a first cannula 6 with a built-in first needle electrode 5, and the two sides of the upper discharger 8 are respectively provided with a first gas inlet interface 7 and an air suction interface 9, and the lower part of the upper discharger 8 is equipped with a first through pipe 11 and an air suction pipe 10 distributed in a ring array around the first through pipe 11. The lower end of the lower discharger 17 is equipped with a second cannula 19 with a built-in second needle electrode 20, and one side of the lower discharger 17 is provided with a second gas inlet interface 18, and the upper part of the lower discharger 17 is equipped with a second through pipe 16.

[0042] In this embodiment, the gas stored in the gas cylinder 2 is argon. Argon is selected as the reaction gas. On the one hand, the plasma generated after ionization will not chemically react with the base material, and on the other hand, it helps to maintain the stability of plasma discharge. The output end of the gas cylinder 2 is connected to the first gas inlet interface 7 on the side of the upper discharger 8 and the second gas inlet interface 18 on the side of the lower discharger 17 through a branch pipe, and a gas flow meter 3 and a first solenoid valve 4 are installed on the main pipe of the branch pipe in sequence.

[0043] In this embodiment, the processing platform 13 is arranged between the upper discharger 8 and the lower discharger 17, and a plurality of through holes for placing the orthokeratology lens 12 are opened on the processing platform 13.

[0044] In this embodiment, the air suction interface 9 is connected to the air suction pump 22 through a gas pipeline, and a second solenoid valve 21 is installed on the gas pipeline.

[0045] In this embodiment, the suction interface 9 can adsorb the orthokeratology lens 12 on the suction tube 10 through the suction pump 22; there are 6 suction tubes 10, which are respectively recorded as the first suction tube 101, the second suction tube 102, the third suction tube 103, the fourth suction tube 104, the fifth suction tube 105 and the sixth suction tube 106. In order to increase the contact area between the six suction tubes 10 and the orthokeratology lens 12, sleeves 107 can be installed on the outside of the six suction tubes 10, so that the orthokeratology lens 12 can be better adsorbed. The outer diameter of the sleeve 107 is 10.5 mm and the wall thickness is 0.3 mm.

[0046] In this embodiment, a high-voltage bipolar AC power supply 1 is respectively connected to the first needle electrode 5 in the first cannula 6 and the second needle electrode 20 in the second cannula 19, and a plasma jet is generated through dielectric barrier discharge; since the orthokeratology lens 12 is adsorbed on the suction tube 10, the plasma jet under the processing table 13 can pass through its through hole and act on the surface of the orthokeratology lens 12, thereby realizing simultaneous double-sided processing of the orthokeratology lens 12.

[0047] In this embodiment, the processing table 13 is installed on the movable part of the moving mechanism 14, and the moving mechanism 14 is provided with a motor 15 for driving the movable part to move.

[0048] In this embodiment, a controller 23 is further included. The controller 23 is connected to the first solenoid valve 4, the second solenoid valve 21 and the motor 15 respectively.

[0049] In this embodiment, the high-voltage bipolar AC power source 1 is connected to the first needle electrode 5 and the second needle electrode 20 through an electrode line interface, and the voltage of the high-voltage bipolar AC power source 1 is 1-50 kV.

[0050] In this embodiment, the first inserting tube 6, the first through tube 11, the second inserting tube 19 and the second through tube 16 are all cylindrical transparent tubes made of high-purity quartz.

[0051] In this embodiment, the length of the first cannula 6 and the second cannula 19 is 65 mm, the outer diameter is 2.5 mm, and the wall thickness is 0.3 mm. The length of the first through tube 11 and the second cannula 19 is 55 mm, the outer diameter is 4.5 mm, and the wall thickness is 0.3 mm. A part of the first cannula 6 is exposed above the first through tube 11, and a part of the second cannula 19 is exposed below the second through tube 16, and the size of the exposed part is 25 mm. The length of the first needle electrode 5 and the second needle electrode 20 is 75 mm.

[0052] In this embodiment, the air intake pipe 10 is a cylindrical transparent tube made of high-purity quartz, with a length of 25 mm, an outer diameter of 2 mm, and a wall thickness of 0.3 mm.

[0053] In this embodiment, the spacing between the processing platform 13 and the upper discharger 8 is 6 mm, and the spacing between the processing platform 13 and the lower discharger 17 is 10-20 mm.

[0054] The first needle electrode 5, the first cannula 6 and the first through-tube 11 of the upper discharger 8 constitute a plasma jet source of a double DBD electrode structure. The first through-tube 11 has a hollow inner cavity and is open at both ends. One end of the first cannula 6 in which the first needle electrode 5 is inserted is open, and the other end is closed. The first cannula 6 is inserted into the first through-tube 11 with both ends open, and a gap is left between the outer wall of the first cannula 6 and the inner wall of the first through-tube 11 for the flow of working gas. The first needle electrode 5 in the first cannula 6 is connected to a power source, and the working gas is input from the upper port of the first through-tube 11. The first cannula 6 can be a capillary tube with a small diameter, so as to facilitate the configuration of the first needle electrode 5 and the action of the working gas. The first needle electrode 5 is a high-voltage electrode, and the material can be copper, aluminum and other conductive materials.

[0055] The lower discharger 17 also constitutes a plasma jet source with a double DBD electrode structure, with reference to the above contents. The internal structure of the lower discharger 17 cavity is the same as that of the upper discharger 8, so as to ensure that when the working gas is input from the port of the corresponding through pipe, the gas flow rate inside the upper and lower discharger cavities can be kept consistent.

[0056] The specific operation of the device in this embodiment includes the following steps:

[0057] S1, placing the orthokeratology lens 12 to be processed with the concave surface facing upward into the through hole of the processing platform 13;

[0058] Specifically, the controller 20 sends a command to the motor 15 to drive the moving mechanism 14 to move the processing table 13, and move the multiple orthokeratology lenses 12 placed thereon to the processing positions in sequence at certain time intervals.

[0059] S2, control the operation of the system through the controller;

[0060] Specifically, after the orthokeratology lens 12 moves to the processing position, the controller 23 controls the operation of the suction pump 22 to extract the gas inside the upper discharger 8, and the orthokeratology lens 12 to be processed is adsorbed onto the suction pipe 10. The working gas is introduced and the power is turned on, and the voltage is gradually increased. The tips of the first cannula 6 and the second cannula 19 begin to ignite, generating corona. As the voltage increases, a uniform plasma jet is formed in the through pipe. The gas flow meter 3 in the system is used to adjust the flow of the working gas according to the instructions of the controller 23. When the gas flow meter 3 detects that the gas flow is lower than, for example, 2.2 slm (the first flow threshold) or higher than, for example, 3 slm (the second flow threshold), the first solenoid valve 4 connected to the gas flow meter 3 can shut off the gas and stop the discharge at the same time. The controller 23 controls the motor 15 to return the processing table 13 to the initial position before the start of the treatment. Then the operator can adjust the gas flow. After the flow is normal and the discharge is restored, the orthokeratology lens can be processed again.

[0061] S3, double-sided treatment of the orthokeratology lens to be treated;

[0062] Specifically, the orthokeratology lens 12 on the processing station 13 is adsorbed on the bottom of the suction pipe 10, and the plasma jet formed by the plasma source in the upper discharger 8 can directly act on the concave surface of the orthokeratology lens 12 to process it. The plasma jet formed by the plasma source in the lower discharger 17 can pass through the through hole of the processing station 13 to act on the convex surface of the orthokeratology lens 12, thereby achieving the simultaneous treatment of the concave and convex surfaces of the orthokeratology lens. In addition, the plasma jet will diffuse to the surroundings when it contacts the orthokeratology lens, thereby ensuring the uniformity of the treatment.

[0063] S4, the processing is completed and the next processing is carried out;

[0064] Specifically, the processing time of each orthokeratology lens 12 can be set to 20 seconds. After 20 seconds, the controller 20 controls the first solenoid valve 4 and the second solenoid valve 18 to stop the gas input, and the orthokeratology lens 12 that has been treated with plasma falls naturally. The controller 20 controls the motor 15 to move the processing table 13 and switch the next orthokeratology lens 12 to be treated for plasma treatment.

[0065] Reference Figure 7 and Figure 8 , it can be verified that the device can simultaneously process the concave and convex surfaces of the orthokeratology lens 12. In addition, the treatment process ensures a high degree of cleanliness and treatment efficiency of the object surface, and its surface activation effect is significant, which significantly enhances the adhesion ability of the orthokeratology lens 12 and further optimizes the hydrophilic properties of the orthokeratology lens.

[0066] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double-sided treatment device for orthokeratology lenses based on plasma jet, characterized in that: It comprises a high-voltage bipolar AC power supply (1), a gas cylinder (2), a gas flow meter (3), a first electromagnetic valve (4), an upper discharger (8), a corneal reshaping lens (12), a processing table (13), a lower discharger (17), a second electromagnetic valve (21) and an air suction pump (22); A first insertion tube (6) with a built-in first needle electrode (5) is installed at the upper end of the upper discharger (8), a first gas inlet interface (7) and a suction interface (9) are respectively provided on both sides of the upper discharger (8), and a first through pipe (11) and suction pipes (10) distributed in a ring array around the first through pipe (11) are installed at the lower part of the upper discharger (8); A second insert tube (19) with a built-in second needle electrode (20) is installed at the lower end of the lower discharger (17), a second gas inlet interface (18) is provided on one side of the lower discharger (17), and a second through pipe (16) is installed on the upper part of the lower discharger (17); The output end of the gas cylinder (2) is connected to a first gas inlet interface (7) on the side of the upper discharger (8) and a second gas inlet interface (18) on the side of the lower discharger (17) through a branch pipe, and a gas flow meter (3) and a first solenoid valve (4) are installed on the main pipe of the branch pipe in sequence; The processing platform (13) is arranged between the upper discharger (8) and the lower discharger (17), and a plurality of through holes for placing orthokeratology lenses (12) are provided on the processing platform (13); The air suction interface (9) is connected to the air suction pump (22) via a gas pipeline, and a second solenoid valve (21) is installed on the gas pipeline; The suction interface (9) can adsorb the orthokeratology lens (12) onto the suction tube (10) via the suction pump (22); the high-voltage bipolar AC power supply (1) is respectively connected to the first needle electrode (5) in the first cannula (6) and the second needle electrode (20) in the second cannula (19), and a plasma jet is generated via dielectric barrier discharge; since the orthokeratology lens (12) is adsorbed onto the suction tube (10), the plasma jet below the processing platform (13) can pass through its through hole and act on the surface of the orthokeratology lens (12), thereby achieving simultaneous double-sided processing of the orthokeratology lens (12).

2. The double-sided treatment device for orthokeratology lenses according to claim 1, characterized in that: The processing table (13) is mounted on a movable part of a moving mechanism (14), and a motor (15) is provided in the moving mechanism (14) for driving the displacement of the movable part.

3. The double-sided treatment device for orthokeratology lenses according to claim 2, characterized in that: It also includes a controller (23), which is connected to the first solenoid valve (4), the second solenoid valve (21) and the motor (15) respectively.

4. The double-sided treatment device for orthokeratology lenses according to claim 1, characterized in that: The high-voltage bipolar AC power source (1) is connected to the first needle electrode (5) and the second needle electrode (20) via an electrode line interface, and the voltage of the high-voltage bipolar AC power source (1) is 1 to 50 kV.

5. The double-sided treatment device for orthokeratology lenses according to claim 1, characterized in that: The first inserting tube (6), the first through tube (11), the second inserting tube (19) and the second through tube (16) are all cylindrical transparent tubes made of high-purity quartz.

6. The double-sided treatment device for orthokeratology lenses according to claim 1, characterized in that: The air intake tube (10) is a cylindrical transparent tube made of high-purity quartz, with a length of 25 mm, an outer diameter of 2 mm and a wall thickness of 0.3 mm.

7. The double-sided treatment device for orthokeratology lenses according to claim 1, characterized in that: The spacing between the processing platform (13) and the upper discharger (8) is 6 mm, and the spacing between the processing platform (13) and the lower discharger (17) is 10 to 20 mm.

8. The double-sided treatment device for orthokeratology lenses according to claim 1, characterized in that: The gas stored in the gas cylinder (2) is argon gas.

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