Injection device for water-light instrument and use method

Abstract

The invention provides an injection device for a water-light instrument and a use method. The injection device comprises a laser optical system; a first cavity and a second cavity are sequentially formed in the shell in the laser transmission direction, and a deformable film is arranged between the first cavity and the second cavity; a transparent sealing cover plate is arranged at one end, far away from the second cavity, of the first cavity, and a light-induced foaming medium and a light transmission assembly are accommodated in the transparent sealing cover plate; when the photo-induced foaming medium in the first cavity generates bubbles under the action of laser, the deformable film deforms towards the direction of the second cavity under the action of bubble pressure; a contraction section is arranged in the middle of the second cavity, an injection channel is formed by the contraction section, and the second cavity is divided into an upper cavity and a lower cavity; an injection solution is contained in the upper cavity, an injection valve is arranged on the injection channel, the injection valve controls the injection solution in the upper cavity to be output to the lower cavity through the injection channel, and an injection outlet is formed in the end, away from the upper cavity, of the lower cavity. And a plurality of problems in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an injection device for a hyaluronic acid analyzer and a method of using the same. Background Art

[0002] As the current mainstream minimally invasive beauty instrument, the hyaluronic acid device achieves hydration, skin rejuvenation and other effects by accurately delivering a special solution containing active ingredients such as vitamins, hyaluronic acid, and growth factors to the mesoderm of the skin. The performance of its injection device directly determines the treatment effect and safety, so it must meet multiple core requirements: in terms of precise quantification, the dosage must be adjusted according to different skin types such as dry and oily (1-6 ml per time) to avoid dosage deviation affecting the effect; the injection depth must be strictly controlled within the mesoderm range of 0.5-2.5 mm. If it is too shallow, the ingredients will not be fully absorbed, and if it is too deep, it will easily damage the subcutaneous tissue; in terms of efficiency, rapid multi-point injection must be achieved, and the full-face treatment time must be compressed to 15-30 minutes to improve the user experience; at the same time, trauma and risks must be minimized to ensure treatment safety.

[0003] Existing injection devices have three main technical limitations: First, the microneedle array combined with the motor drive solution can control the dosage and depth through the mechanical structure, but the microneedles are in direct traumatic contact with the skin, which is not only prone to infection due to improper disinfection, but also causes puncture pain. In addition, repeated use of the microneedles requires high-frequency maintenance, which increases operating costs. Second, the compressed air drive solution does not require a needle to reduce trauma, but relies on a 50-100 Bar high-pressure CO2 tank, which is prone to leakage or even explosion due to temperature and impact, and the gas pressure fluctuates greatly, resulting in significant injection dosage errors and difficult to accurately control. Third, the voice coil motor drives the piston solution. Although there is no needle, the motor frequently reciprocates, which is prone to produce obvious noise and continuous heat, which not only affects the operating environment, but may also destroy the active ingredients of the solution due to increased temperature. At the same time, mechanical wear will lead to a decrease in accuracy with increasing use, shortening the life of the device.

[0004] In summary, the existing solutions have obvious defects in safety, stability and accuracy, and are difficult to meet clinical and market needs. Therefore, there is an urgent need to develop a new injection device to break through the above bottlenecks. Summary of the Invention

[0005] In order to solve all or part of the problems of the above-mentioned prior art, the present invention provides an injection device and a method of use for a hyaluronic acid analyzer. By adopting the principle of laser thermal foaming to drive the deformation of a deformable film to control the linked opening and closing of the injection valve, continuous micro-precision injection and automatic replenishment of injection solutions are achieved without needles, high-pressure gas or motor drive, overcoming the problems of infection, safety and experience existing in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions: An injection device for a water light instrument, comprising: A laser optical system, used to provide a laser light source; A housing, wherein a first cavity and a second cavity are sequentially arranged in the housing along the laser transmission direction, and a deformable film is provided between the first cavity and the second cavity; A transparent sealing cover is provided at one end of the first cavity away from the second cavity, and contains a photofoaming medium and a light transmission component therein. The light transmission component is used to transmit the laser light output by the laser optical system to the photofoaming medium. When the photofoaming medium in the first cavity is acted upon by the laser to generate bubbles, the deformable film is deformed toward the second cavity under the action of the bubble pressure. A contraction section is provided in the middle of the second cavity, and the contraction section forms an injection channel, which divides the second cavity into an upper chamber and a lower chamber; the upper chamber contains an injection solution, and an injection valve is provided on the injection channel. The injection valve is used to control the on and off of the injection solution in the upper chamber to be output to the lower chamber through the injection channel, and an injection outlet is provided at one end of the lower chamber away from the upper chamber.

[0007] An inlet channel is provided on the shell at a position corresponding to the upper chamber, one end of the inlet channel is connected to the upper chamber, and the other end is connected to an external solution source; an inlet valve is provided at the end of the inlet channel connected to the upper chamber, for controlling the on and off of replenishment of the external solution to the second chamber.

[0008] The materials of the deformable film, the injection valve and the inlet valve are shape memory alloy or metal-polymer composite film; the injection valve is located in the upper chamber and is two valves arranged opposite to each other and fixed at the entrance of the injection channel; the inlet valve is integrally formed with one of the valves located on one side of the inlet channel.

[0009] The shape memory alloy is a Ni-Ti alloy, and the metal-polymer composite film is a stainless steel-PDMS composite film.

[0010] The laser optical system adopts an erbium-doped yttrium aluminum garnet laser, the wavelength of the output laser is 2940nm, and it is output in the form of pulses; the emission frequency of the laser optical system is 3-10Hz.

[0011] The shell of the device is made of a silicon-based substrate, and the sealing cover is made of glass, which are made by anodic bonding.

[0012] The photofoaming medium is water or pure water.

[0013] The inlet channel, the injection channel and the internal channels of the first cavity and the second cavity are manufactured by photolithography and deep reactive ion etching process.

[0014] The laser transmission direction is forward, and the reverse withstand voltage of the deformable thin film is greater than the forward opening pressure.

[0015] The application also provides a use method of the injection device for a water-light instrument, which is based on the device described above and comprises the following steps of: in an initial state, the laser optical system does not emit laser, the deformable thin film is in a reset state, the injection valve and the inlet valve are both in a closed state, the first cavity is filled with a light-induced foaming medium, and the upper chamber is pre-filled with an injection solution, and then the following steps are cyclically performed: S1. Laser emission: the laser optical system emits laser, which is transmitted to the light-induced foaming medium in the first cavity through the light transmission assembly, so as to cause the light-induced foaming medium to absorb laser energy and generate bubbles; S2. Solution injection: the pressure generated by the increasing bubbles pushes the deformable thin film to deform forward to the second cavity side, so that the injection valve is opened, and the injection solution in the upper chamber is injected outward through the injection outlet of the lower chamber; S3. Solution supplement: the bubbles in the light-induced foaming medium break, the deformable thin film deforms reversely, a negative pressure is formed in the upper chamber, so that the injection valve is closed and the inlet valve is opened, and external solution is supplemented to the upper chamber through the inlet channel.

[0016] Through the above steps, continuous micro-injection and automatic supplement of the injection solution are realized. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the specific embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a structure schematic diagram of the injection device for a water-light instrument according to an embodiment of the application.

[0019] Figure 2 It is a use process schematic diagram of the injection device for a water-light instrument according to an embodiment of the application.

[0020] Figure numerals: 1. Laser optical system; 2. Shell; 3. First cavity; 4. Second cavity; 401. Upper chamber; 402. Lower chamber; 5. Deformable film; 6. Transparent sealing cover; 7. Optical transmission component; 8. Injection valve; 9. Injection outlet; 10. Inlet channel; 11. Inlet valve. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the specific embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0022] In the embodiment of the present invention, Figure 1 、 2 As shown, an injection device for a water light instrument is provided, the core of which is to use the laser thermal foaming principle to achieve needle-free and precise solution injection. The specific structure includes: The laser optical system 1, as the energy source of the device, is used to provide a stable and controllable laser light source, and its output parameters can be adjusted according to the injection requirements.

[0023] The shell 2 serves as the supporting base of the device. Inside it, a first cavity 3 and a second cavity 4 are independently arranged in sequence along the laser transmission direction. A deformable film 5 that can undergo elastic deformation is used to achieve physical isolation and pressure conduction between the two cavities.

[0024] One end of the first cavity 3 away from the second cavity 4 is sealed with a transparent sealing cover 6, which not only ensures the airtightness of the first cavity 3 but also provides a path for the laser to enter; the first cavity 3 is filled with a photofoaming medium and an optical transmission component 7, wherein the optical transmission component 7 adopts a laser coupler, which can efficiently and directionally transmit the laser output by the laser optical system 1 to the photofoaming medium; when the laser acts on the photofoaming medium, the medium absorbs energy and rapidly heats up to generate bubbles, which rapidly expand in the confined space, thereby pushing the deformable film 5 to deform toward the side of the second cavity 4.

[0025] The middle part of the second cavity 4 is provided with a contraction section with a sudden reduction in cross-sectional size, which forms an injection channel penetrating up and down, thereby separating the second cavity 4 into an upper chamber 401 and a lower chamber 402; the upper chamber 401 serves as a temporary storage space for injection solution and is pre-filled with a cosmetic solution containing active ingredients; an injection valve 8 is arranged at the inlet of the injection channel, which precisely controls the on-off of the injection solution in the upper chamber 401 to the lower chamber 402 through the injection channel; the lower chamber 402 serves as a transition space for solution injection, and the end thereof away from the upper chamber 401 is provided with an injection outlet 9 with a small hole diameter, which ensures that the solution is sprayed in the form of high-pressure microflow.

[0026] In order to realize automatic replenishment of the injection solution, an inlet channel 10 is formed on the shell 2 corresponding to the position of the upper chamber 401, one end of which is in communication with the upper chamber 401, and the other end is connected to an external solution source through a pipeline; the connection end of the inlet channel 10 and the upper chamber 401 is provided with an inlet valve 11, which controls the replenishment rhythm of the external solution to the second cavity 4 through the opening and closing of the valve, so as to ensure that the upper chamber 401 always maintains sufficient amount of solution.

[0027] In the embodiment, the deformable film 5, the injection valve 8 and the inlet valve 11 are all made of materials with high elastic recovery performance, specifically, shape memory alloy or metal-polymer composite film can be selected; wherein the injection valve 8 adopts a valve structure composed of two oppositely arranged valves, the fixed ends of the valves are connected to the fixed points on both sides of the injection channel inlet, and the free ends are naturally adhered to realize sealing; the inlet valve 11 and the valve near the inlet channel 10 are made by integral molding process, which simplifies the structure and ensures the reliability of linkage; the inlet channel 10 is also provided with fixed points for enhancing the stability of valve assembly. Further, the shape memory alloy is preferably Ni-Ti alloy, which has excellent shape memory effect and super-elasticity, and can withstand tens of thousands of repeated deformations without failure; the metal-polymer composite film is preferably a stainless steel-PDMS composite film, which uses a stainless steel base layer to ensure structural strength and a PDMS layer to provide good flexibility and sealing performance; the above-mentioned materials all need to meet the characteristics of high reverse pressure resistance and low positive opening pressure, wherein the laser transmission direction is defined as positive, the reverse pressure resistance of the deformable film 5 is designed to be greater than the positive opening pressure, which ensures the unidirectionality and stability of pressure conduction.

[0028] The photofoaming medium can be a fluid with excellent light absorption properties, such as water or pure water. In this embodiment, water is specifically used due to its high absorption efficiency for lasers of specific wavelengths, resulting in a rapid and easily controllable foaming reaction. Laser optical system 1 utilizes an erbium-doped yttrium aluminum garnet laser, outputting laser light at a wavelength of 2940 nm, close to the absorption peak of water and maximizing its conversion to heat energy. The laser light is output in pulsed form, and the pulse width and energy can be precisely controlled. The emission frequency of laser optical system 1 is 3-10 Hz. In practical applications, the frequency can be selected based on the desired drug delivery rate, device power consumption, and the need to maintain solution activity. A typical frequency setting is 10 Hz, which allows for microinjections of 10 times per second, achieving both efficiency and accuracy.

[0029] The entire injection device system is manufactured using micro-electromechanical system (MEMS) processing technology, in which the shell 2 adopts a high-purity silicon-based substrate and the sealing cover is made of borosilicate glass. The two are hermetically sealed through an anodic bonding process to ensure the pressure-bearing performance of the cavity; the inlet channel 10, injection channel and the internal channels of the first cavity 3 and the second cavity 4 are all produced through photolithography and deep reactive ion etching (DRIE) processes, which can achieve micron-level dimensional accuracy; the deformable film 5, injection valve 8 and inlet valve 11 are prepared by sputtering deposition, photoresist sacrificial layer or bonding process according to the characteristics of the materials used, ensuring material compatibility while ensuring their deformation freedom and structural reliability.

[0030] The present invention also provides a method for using the injection device for a water light instrument, which is implemented based on the above device, and the specific steps are as follows: In the initial state, the laser optical system 1 is in a standby state and does not emit laser light; the deformable film 5 is in a reset state due to its own elasticity; the injection valve 8 and the inlet valve 11 are both in a closed state due to the elastic force, achieving sealed storage of the solution; the first cavity 3 is pre-filled with a photofoaming medium, and the upper chamber 401 is pre-filled with a set amount of injection solution; Then loop through the following operations: S1. Laser emission: The laser optical system 1 emits laser pulses according to the set parameters. The laser is efficiently transmitted to the photo-foaming medium in the first cavity 3 through the optical transmission component 7. After absorbing the laser energy, the medium quickly heats up to the boiling point within a certain period of time, generating a large number of tiny bubbles; (as shown in the attached Figure 2 a→b process in S2. Solution injection: As the volume of the bubble rapidly expands, the pressure in the first cavity 3 rises sharply, pushing the deformable film 5 to deform positively toward the second cavity 4. The space in the upper cavity 401 is compressed, and the internal pressure increases, causing the two valves of the injection valve 8 to open to both sides. Under the action of pressure, the injection solution in the upper cavity 401 flows into the lower cavity 402 through the injection channel, and is finally ejected from the injection outlet 9 in the form of a high-pressure microjet, precisely acting on the target area of ​​the skin; (See attached figure for details). Figure 2 c process in S3. Solution replenishment: After the laser pulse ends, the bubbles in the photofoaming medium quickly burst due to the energy release, the pressure in the first cavity 3 drops sharply, and the deformable film 5 undergoes reverse deformation and resets under the action of its own elasticity and reverse pressure; at this time, negative pressure is formed in the upper chamber 401, the injection valve 8 closes under the action of elastic force, and the inlet valve 11 is sucked open by the negative pressure, and the solution in the external solution source is automatically replenished to the upper chamber 401 through the inlet channel 10 (as shown in the attached Figure 2 d process in the figure) until the pressure in the chamber is balanced and the inlet valve 11 returns to the closed state.

[0031] By repeating the above steps, the device can achieve continuous micro-injection and automatic replenishment of the injection solution. The single injection dose can be precisely controlled by laser energy, pulse width and cavity volume to meet the needs of different skin types and treatment areas.

[0032] The significant advantages of the present invention are: the needle-free design completely avoids the infection risk and pain caused by traditional needle puncture; no high-pressure gas drive is required, eliminating the explosion hazard of the high-pressure storage tank and the dosage error caused by pressure fluctuations; the motor drive structure is abandoned, solving the noise and heat problems from the root, avoiding the damage to the active ingredients in the solution caused by the increase in temperature; at the same time, the integration and miniaturization of the device are realized through micro-machining technology, the injection dose can be precisely controlled at the trace level, and the power consumption is low and the battery life is long; these characteristics greatly reduce the operating threshold of the hyaluronic acid water light instrument, which is not only convenient for professional medical institutions to use, but also more conducive to popularization in home scenarios, allowing more people who have needs for beauty and skin care to obtain treatment conveniently and safely, thereby effectively expanding the market application scale of the hyaluronic acid water light instrument.

[0033] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An injection device for a water light instrument, characterized in that: include: A laser optical system (1) for providing a laser light source; A housing (2), wherein a first cavity (3) and a second cavity (4) are sequentially arranged in the housing (2) along a laser transmission direction, and a deformable film (5) is provided between the first cavity (3) and the second cavity (4); A transparent sealing cover plate (6) is provided at one end of the first cavity (3) away from the second cavity (4), and contains a photo-foaming medium and a light transmission component (7) therein. The light transmission component (7) is used to transmit the laser light output by the laser optical system (1) to the photo-foaming medium; when the photo-foaming medium in the first cavity (3) generates bubbles under the action of the laser light, the deformable film (5) is deformed toward the second cavity (4) under the action of the bubble pressure; A contraction section is provided in the middle of the second cavity (4), and the contraction section forms an injection channel, which divides the second cavity (4) into an upper chamber (401) and a lower chamber (402); the upper chamber (401) contains an injection solution, and an injection valve (8) is provided on the injection channel, and the injection valve (8) is used to control the injection solution in the upper chamber (401) to be output to the lower chamber (402) through the injection channel. An injection outlet (9) is provided at one end of the lower chamber (402) away from the upper chamber (401).

2. The device according to claim 1, characterized in that An inlet channel (10) is provided on the shell (2) at a position corresponding to the upper chamber (401), one end of the inlet channel (10) is connected to the upper chamber (401), and the other end is connected to an external solution source; an inlet valve (11) is provided at the end of the inlet channel (10) connected to the upper chamber (401) for controlling the on-off replenishment of the external solution to the second chamber (4).

3. The device according to claim 2, characterized in that The deformable film (5), the injection valve (8) and the inlet valve (11) are made of shape memory alloy or metal-polymer composite film; the injection valve (8) is located in the upper chamber (401) and is composed of two valves arranged opposite to each other and fixed at the inlet of the injection channel; the inlet valve (11) is integrally formed with one of the valves located on one side of the inlet channel (10).

4. The device according to claim 3, characterized in that The shape memory alloy is a Ni-Ti alloy, and the metal-polymer composite film is a stainless steel-PDMS composite film.

5. The device according to claim 1, characterized in that The laser optical system (1) adopts an erbium-doped yttrium aluminum garnet laser, the wavelength of the output laser is 2940nm, and the output is in the form of pulses; the emission frequency of the laser optical system (1) is 3-10Hz.

6. The device according to claim 1, characterized in that The housing (2) of the device adopts a silicon-based substrate, and the sealing cover plate adopts glass, and the two are made by anodic bonding.

7. The device according to claim 1, characterized in that The photofoaming medium is water or pure water.

8. The device according to claim 2, characterized in that The inlet channel (10), the injection channel, and the internal channels of the first cavity (3) and the second cavity (4) are manufactured by photolithography and deep reactive ion etching processes.

9. The device according to claim 1, characterized in that The laser transmission direction is forward, and the reverse withstand pressure of the deformable film (5) is greater than the forward opening pressure.

10. A method for using an injection device for a water light instrument, characterized in that: Based on the device according to any one of claims 1 to 9, the method comprises: in an initial state, the laser optical system (1) does not emit laser light, the deformable film (5) is in a reset state, and the injection valve (8) and the inlet valve (11) are both in a closed state; the first cavity (3) is filled with a photofoaming medium, and the upper chamber (401) is pre-filled with an injection solution, and then the following steps are cyclically performed: S1. Laser emission: the laser optical system (1) emits laser light, which is transmitted to the photofoaming medium in the first cavity (3) via the optical transmission component (7), causing the photofoaming medium to absorb laser energy and generate bubbles; S2. Solution injection: As the bubbles increase, pressure is generated, pushing the deformable film (5) toward the second cavity (4) to undergo positive deformation, causing the injection valve (8) to open, and the injection solution in the upper chamber (401) to be ejected outward through the injection outlet (9) of the lower chamber (402); S3. Solution replenishment: The bubbles in the photofoaming medium burst, the deformable film (5) deforms in the reverse direction, and a negative pressure is formed in the upper chamber (401), so that the injection valve (8) is closed and the inlet valve (11) is opened, and the external solution is replenished into the upper chamber (401) through the inlet channel (10).

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