A plasma skin treatment device

Abstract

The application relates to the technical field of medical devices, and discloses a plasma skin treatment device which comprises a shell, a front end cover, a cold plasma generator, an inert gas supply mechanism, a treatment head and a controller, the front end cover is arranged at the front end of the shell, the cold plasma generator and the inert gas supply mechanism are electrically connected with the controller, and the three are arranged in the shell, the treatment head comprises a mounting seat and a treatment electrode assembly, the mounting seat is detachably connected to the front end cover, a containing cavity is arranged at the front end of the mounting seat, the treatment electrode assembly is arranged in the containing cavity, the mounting seat is provided with a ventilation hole which is connected between the containing cavity and the inside of the shell, the cold plasma generator is connected with the treatment electrode assembly and is in conduction, and the inert gas supply mechanism is used for supplying inert gas into the containing cavity through the ventilation hole; wherein the controller is configured to supply inert gas into the containing cavity by the inert gas supply mechanism when the cold plasma generator is started. The application can realize more flexible, accurate and efficient skin treatment.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a plasma skin treatment device. Background Technology

[0002] Cold plasma technology has become an important tool in the field of skin beauty and treatment because it can be generated at normal pressure, has low temperature, causes little damage to the skin, and has biological effects such as sterilization, anti-inflammation, promoting collagen regeneration, and improving microcirculation.

[0003] Currently, various skin treatment devices utilizing cold plasma have appeared on the market. Chinese patent application number 202411509118.7 discloses a plasma skin treatment device and control method. Its working principle is as follows: an MCU control board controls a semiconductor cooling chip to cool the cold head, thereby cooling the patient's treatment area; a stepper motor drives a push rod to move, pushing the nutrient solution or repair solution in the fluid supply unit through a guide plate to coat the treatment area; simultaneously, a cold plasma generator is controlled to produce cold plasma, and inert gas is sprayed into the cold plasma generator through a gas pipe to assist ionization; the cold plasma directly acts on the patient's treatment area.

[0004] While the aforementioned existing technologies can achieve the combined functions of plasma therapy, local cooling, and fluid-assisted repair, their front-end treatment head is a fixed, single structure that cannot be quickly replaced according to the size of the treatment site and specific treatment needs. Summary of the Invention

[0005] The purpose of this invention is to provide a plasma skin treatment device that enables more flexible, precise, and efficient skin treatment.

[0006] To address the aforementioned technical problems, the present invention provides the following technical solution: A plasma skin treatment device includes a housing, a front cover, a cold plasma generator, an inert gas supply mechanism, a treatment head, and a controller. The front cover is located at the front end of the housing. The cold plasma generator and the inert gas supply mechanism are both electrically connected to the controller, and all three are located inside the housing. The treatment head includes a mounting base and a treatment electrode assembly. The mounting base is detachably connected to the front cover. The front end of the mounting base has a receiving cavity, and the treatment electrode assembly is located inside the receiving cavity. The mounting base has a vent hole communicating between the receiving cavity and the interior of the housing. The cold plasma generator is connected to and conductively communicates with the treatment electrode assembly. The inert gas supply mechanism is used to introduce inert gas into the receiving cavity through the vent hole. The controller is configured such that when the cold plasma generator is started, the inert gas supply mechanism introduces inert gas into the containment cavity.

[0007] In some embodiments, the treatment head further includes a conductive sponge disposed on the mounting base and located on the side of the treatment electrode assembly near the housing, and the cold plasma generator abuts against the conductive sponge.

[0008] In some embodiments, the mounting base has a cylindrical snap-fit ​​portion on the side near the housing, and a snap-fit ​​protrusion is provided on the outer periphery of the snap-fit ​​portion. The front end cover has a mounting hole, and the front end of the housing has a snap-fit ​​hole that is directly opposite to the mounting hole. The mounting base is located in the mounting hole and abuts against the front end of the housing. The snap-fit ​​portion is located in the snap-fit ​​hole, and the snap-fit ​​protrusion abuts against the inner wall of the snap-fit ​​hole. The conductive sponge is located in the snap-fit ​​portion, and the front end of the cold plasma generator extends into the snap-fit ​​portion and abuts against the conductive sponge.

[0009] In some embodiments, the plasma skin treatment device further includes a cylindrical clamp disposed inside the housing, the cold plasma generator being fixed inside the clamp, and the front end of the cold plasma generator extending from the front end of the clamp and passing through the snap-fit ​​portion.

[0010] In some embodiments, the inert gas supply mechanism includes a gas supply pump and a gas pipe, the gas supply pump being connected to the gas pipe and electrically connected to the controller, and the output end of the gas pipe facing the rear end of the clamp for delivering inert gas into the clamp.

[0011] In some embodiments, the front end cover is provided with a barrier on its front side, and the barrier is arranged around the outer periphery of the mounting hole along the edge of the mounting hole. A notch is provided at one end of the barrier away from the front end cover. An extension block is provided on the outer side of the mounting base. The extension block is located inside the notch, and there is a gap between the extension block and the bottom of the notch.

[0012] In some embodiments, the plasma skin treatment device further includes a cooling mechanism, which includes a cold head, a thermoelectric cooler, and a heat pipe. The cold head and the heat pipe are located on opposite sides of the thermoelectric cooler. The cold head is mounted on the front end cover and protrudes from the front side of the front end cover. The front side of the cold head is flush with the front side of the mounting base. The heat pipe is fixed to the outside of the clamp and extends along the axial direction of the clamp. The thermoelectric cooler is electrically connected to the controller.

[0013] In some embodiments, the clamp has a vent on the side near the heat pipe.

[0014] In some embodiments, the plasma skin treatment device further includes a nutrient solution supply mechanism, which includes a fluid supply device, a propulsion drive assembly, and a fluid guide plate. The fluid supply device and the propulsion drive assembly are both disposed within the housing. The fluid guide plate has a plurality of fluid guide holes evenly distributed on it and is disposed on the front end cover. A fluid guide cylinder is provided on the side of the front end cover near the housing. The fluid guide plate is located at one end of the fluid guide cylinder. The output end of the fluid supply device extends into the other end of the fluid guide cylinder. The propulsion drive assembly is connected to the fluid supply device to push the nutrient solution in the fluid supply device onto the fluid guide plate. The propulsion drive assembly is electrically connected to the controller.

[0015] In some embodiments, the therapeutic electrode assembly includes a first therapeutic electrode assembly, a second therapeutic electrode assembly, a third therapeutic electrode assembly, and a fourth therapeutic electrode assembly; The first therapeutic electrode assembly includes a first metal sheet located within the receiving cavity; The second treatment electrode assembly includes a second metal sheet and a first ceramic sheet located within the receiving cavity. The first ceramic sheet is attached to the side of the second metal sheet away from the mounting base, and the outer edges of the first ceramic sheet and the second metal sheet are flush. The third therapeutic electrode assembly includes a third metal sheet located within the receiving cavity, and the third metal sheet has a tapered first protrusion on the side away from the mounting base and in the central region. The fourth therapeutic electrode assembly includes a fourth metal plate and a ceramic head located within the receiving cavity. The fourth metal plate has a tapered second protrusion on the side away from the mounting base and in the central region. The ceramic head covers the second protrusion. Compared with the prior art, the plasma skin treatment device of this invention has the following advantages: In this invention, when the plasma skin treatment device is in use, the treatment head is aligned with and pressed against the area of ​​skin to be treated, and the receiving cavity of the mounting base is aligned with the area of ​​skin to be treated. When the cold plasma generator is activated, the controller controls the inert gas supply mechanism to introduce inert gas into the receiving cavity through the vent. The inert gas is usually argon or nitrogen. Inert gas has a low ionization energy at atmospheric pressure, which makes it easier for the treatment electrode assembly to ionize plasma. At the same time, the continuous supply of inert gas forms a gas flow field to blow the plasma to the skin surface for treatment. It also removes excess heat, which helps to reduce the plasma temperature and minimizes thermal damage to the skin. In addition, since the treatment head is detachably connected to the front cover, the treatment head can be quickly replaced according to specific treatment needs, enabling more flexible, precise, and efficient skin treatment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is an exploded view of the treatment head and front end cap according to an embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the image; Figure 4 This is a schematic diagram of the internal structure of the outer shell according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the cooling mechanism, cold plasma generator, treatment head, and clamp according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the front cover, cooling mechanism, treatment head, and fluid guide plate according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the first type of treatment head according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the second type of treatment head according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the third type of treatment head according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the fourth type of treatment head according to an embodiment of the present invention.

[0017] In the diagram, 1 represents the outer casing; 11 represents the snap-fit ​​hole. 2. Front end cap; 21. Mounting hole; 22. Enclosure; 221. Notch; 23. Liquid guide tube; 3. Cold plasma generator; 4. Inert gas supply mechanism; 41. Gas pipe; 5. Treatment head; 51. Mounting base; 511. Receiving cavity; 512. Vent hole; 513. Snap-fit ​​part; 514. Snap-fit ​​protrusion; 515. Extension block; 52. Treatment electrode assembly; 521. First metal sheet; 522. Second metal sheet; 523. First ceramic sheet; 524. Third metal sheet; 525. First protrusion; 526. Fourth metal sheet; 527. Second protrusion; 528. Ceramic head; 53. Conductive sponge; 6. Controller; 7. Fixture; 71. Vent; 8. Refrigeration mechanism; 81. Cold head; 82. Semiconductor refrigeration chip; 83. Heat pipe; 9. Nutrient solution supply mechanism; 91. Fluid supplier; 92. Liquid guide plate; 93. Stepper motor; 94. Push rod; Detailed Implementation

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] In the description of this invention, it should be understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, parts, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts, components, and / or groups thereof. It should be understood that when we say a part is "connected" to another part, it can be directly connected to the other part, or there may be intermediate parts. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0020] like Figures 1 to 6 As shown, this invention relates to a plasma skin treatment device, comprising a housing 1, a front cover 2, a cold plasma generator 3, an inert gas supply mechanism 4, a treatment head 5, and a controller 6. The front cover 2 is located at the front end of the housing 1. The cold plasma generator 3 and the inert gas supply mechanism 4 are both electrically connected to the controller 6, and all three are located within the housing 1. The treatment head 5 includes a mounting base 51 and a treatment electrode assembly 52. ​​The mounting base 51 is detachably connected to the front cover 2. The front end of the mounting base 51 has a receiving cavity 511. The treatment electrode assembly 52 is located within the receiving cavity 511. The mounting base 51 has a vent hole 512 communicating between the receiving cavity 511 and the interior of the housing 1. The cold plasma generator 3 is connected to and conductively communicates with the treatment electrode assembly 52. ​​The inert gas supply mechanism 4 is used to introduce inert gas into the receiving cavity 511 through the vent hole 512.

[0021] The controller 6 is configured such that when the cold plasma generator 3 is started, the inert gas supply mechanism 4 introduces inert gas into the accommodating cavity 511.

[0022] In this invention, when the plasma skin treatment device is in use, the treatment head 5 is aligned with and pressed against the area of ​​skin to be treated, and the receiving cavity 511 of the mounting base 51 is aligned with the area of ​​skin to be treated. When the cold plasma generator 3 is activated, the controller 6 controls the inert gas supply mechanism 4 to introduce inert gas into the receiving cavity 511 through the vent 512. The inert gas is usually argon or nitrogen. Inert gas has a low ionization energy at atmospheric pressure, which makes it easier for the treatment electrode assembly 52 to ionize plasma. At the same time, a gas flow field is formed under the continuous supply of inert gas to blow the plasma to the skin surface for treatment. It can also remove excess heat, which helps to reduce the plasma temperature and minimize thermal damage to the skin. In addition, since the treatment head 5 is detachably connected to the front end cover 2, the treatment head 5 can be quickly replaced according to specific treatment needs, so as to achieve more flexible, precise and efficient skin treatment.

[0023] It should be noted that when the front side of the mounting base 51 of the treatment head 5 is pressed against the user's skin surface, the inert gas will be continuously sprayed out through the gap between the mounting base 51 and the skin while the inert gas supply mechanism 4 is continuously supplying inert gas. This allows the gas field formed by the inert gas to continuously drive the plasma to the area of ​​the skin to be treated and continuously remove heat.

[0024] In this embodiment, the treatment head 5 further includes a conductive sponge 53, which is disposed on the mounting base 51 and located on the side of the treatment electrode assembly 52 near the outer shell 1. The cold plasma generator 3 abuts against the conductive sponge 53.

[0025] In other words, the conductive sponge 53 possesses both conductivity and cushioning properties. When the conductive sponge 53 is placed between the treatment electrode assembly 52 and the cold plasma generator 3, it allows electrical conductivity between the cold plasma generator 3 and the treatment electrode assembly 52, while also providing a cushioning effect. Simultaneously, even under vibration, stable electrical conductivity between the treatment electrode assembly 52 and the cold plasma generator 3 can be ensured, guaranteeing the operational stability of the plasma skin treatment device.

[0026] In this embodiment, the mounting base 51 has a cylindrical snap-fit ​​portion 513 on the side near the outer shell 1, and a snap-fit ​​protrusion 514 is provided on the outer periphery of the snap-fit ​​portion 513. The front end cover 2 has a mounting hole 21, and the front end of the outer shell 1 has a snap-fit ​​hole 11 that is directly opposite to the mounting hole 21. The mounting base 51 is located inside the mounting hole 21 and abuts against the front end of the outer shell 1. The snap-fit ​​portion 513 is located inside the snap-fit ​​hole 11, and the snap-fit ​​protrusion 514 abuts against the inner wall of the snap-fit ​​hole 11. The conductive sponge 53 is located inside the snap-fit ​​portion 513, and the front end of the cold plasma generator 3 extends into the snap-fit ​​portion 513 and abuts against the conductive sponge 53.

[0027] That is, when assembling the treatment head 5, the snap-fit ​​portion 513 of the mounting base 51 passes through the mounting hole 21 of the mounting base 51 and is inserted into the snap-fit ​​hole 11 at the front end of the outer shell 1. The snap-fit ​​protrusion 514 presses against the inner wall of the snap-fit ​​hole 11, thereby securing the snap-fit ​​portion 513 within the snap-fit ​​hole 11. This ensures that the mounting base 51 is securely attached to the front end cover 2, ultimately ensuring the stability of the treatment head 5 after installation without human intervention. When it is necessary to replace the treatment head 5, simply pull the snap-fit ​​portion 513 out of the snap-fit ​​hole 11; the operation is quite convenient. Furthermore, by placing the conductive sponge 53 inside the cylindrical snap-fit ​​portion 513, the stability of the conductive sponge 53 is ensured. Moreover, the front end of the cold plasma generator 3 extends into the snap-fit ​​portion 513 and presses against the conductive sponge 53, thus protecting the cold plasma generator 3 through the snap-fit ​​portion 513.

[0028] In this embodiment, the plasma skin treatment device further includes a cylindrical clamp 7, which is disposed inside the outer shell 1. The cold plasma generator 3 is fixed inside the clamp 7, and the front end of the cold plasma generator 3 extends out from the front end of the clamp 7 and passes into the snap-fit ​​portion 513.

[0029] In other words, by setting the clamp 7, on the one hand, the cold plasma generator 3 can be installed, and on the other hand, the clamp 7 can also protect the cold plasma generator 3, preventing it from colliding with the outer shell 1 under vibration, thus ensuring that the plasma skin treatment device can be used stably for a long time.

[0030] In this embodiment, the inert gas supply mechanism 4 includes a gas supply pump and a gas pipe 41. The gas supply pump is connected to the gas pipe 41 and is electrically connected to the controller 6. The output end of the gas pipe 41 faces the rear end of the clamp 7 to deliver inert gas into the clamp 7.

[0031] Specifically, the front end of the clamp 7 is close to and directly opposite the locking part 513, and the input end of the air pipe 41 is used to connect to an external inert gas source. Thus, when the gas supply pump is running, the inert gas can be blown into the clamp 7 through the air pipe 41. The inert gas can flow along the clamp 7, allowing the inert gas to be smoothly injected into the locking part 513, and enter the receiving cavity 511 through the conductive sponge 53 and the vent hole 512, forming a stable gas flow field.

[0032] In this embodiment, a baffle 22 is provided on the front side of the front cover 2, and the baffle 22 is arranged around the outer periphery of the mounting hole 21 along the edge of the mounting hole 21. A notch 221 is provided at one end of the baffle 22 away from the front cover 2. An extension block 515 is provided on the outer side of the mounting base 51. The extension block 515 is located inside the notch 221, and there is a gap between the extension block 515 and the bottom of the notch 221.

[0033] That is, by extending a baffle 22 on the front side of the front cover 2, the contact area with the mounting base 51 can be increased, which helps to strengthen the stability of the treatment head 5. Then, the baffle 22 has a notch 221, the extension block 515 of the mounting base 51 is located in the notch 221, and there is a gap between the extension block 515 and the bottom of the notch 221, so that the user can easily pry the extension block 515 and then pry out the treatment head 5, thus successfully completing the disassembly of the treatment head 5.

[0034] Specifically, the enclosure 22 is provided with a plurality of notches 221 spaced apart along the circumference, and the outer side of the mounting base 51 is provided with a plurality of extension blocks 515, so as to improve the disassembly efficiency of the treatment head 5.

[0035] In this embodiment, the plasma skin treatment device further includes a cooling mechanism 8, which includes a cold head 81, a semiconductor cooling chip 82, and a heat pipe 83. The cold head 81 and the heat pipe 83 are located on opposite sides of the semiconductor cooling chip 82. The cold head 81 is mounted on the front end cover 2 and protrudes from the front side of the front end cover 2. The front side of the cold head 81 is flush with the front side of the mounting base 51. The heat pipe 83 is fixed to the outside of the clamp 7 and extends along the axial direction of the clamp 7. The semiconductor cooling chip 82 is electrically connected to the controller 6.

[0036] That is, by setting up the cooling mechanism 8, the cold energy generated by the semiconductor cooling chip 82 is transferred to the cold head 81, which is set on the front end cover 2. When the cold head 81 comes into contact with the patient's skin, it can cool the patient's skin. After the treatment head 5 has finished treating the skin, the patient's discomfort can be reduced by letting the cold head 81 cool the treated skin.

[0037] Preferably, the clamp 7 has a vent 71 on the side near the heat pipe 83.

[0038] That is, when the inert gas is sprayed from the air pipe 41 to the clamp 7, some of the inert gas can be sprayed out from the air vent 71, thereby acting on the heat pipe 83 and achieving the effect of heat dissipation, thus improving the heat dissipation efficiency of the heat pipe 83.

[0039] In this embodiment, the plasma skin treatment device further includes a nutrient solution supply mechanism 9, which includes a fluid supply device 91, a propulsion drive assembly, and a fluid guide plate 92. The fluid supply device 91 and the propulsion drive assembly are both disposed inside the outer casing 1. The fluid guide plate 92 has multiple fluid guide holes evenly distributed on it and is disposed on the front end cover 2. The front end cover 2 has a fluid guide cylinder 23 on the side near the outer casing 1. The fluid guide plate 92 is located at one end of the fluid guide cylinder 23. The output end of the fluid supply device 91 extends into the other end of the fluid guide cylinder 23. The propulsion drive assembly is connected to the fluid supply device 91 to push the nutrient solution in the fluid supply device 91 onto the fluid guide plate 92. The propulsion drive assembly is electrically connected to the controller 6.

[0040] In other words, the propulsion drive assembly is controlled by the controller 6. This assembly pushes the nutrient solution in the fluid supply unit 91 onto the guide plate 92. Since the guide plate 92 has multiple evenly distributed guide holes, it facilitates the uniform dispersion of the nutrient solution. Therefore, after plasma treatment of the skin, the nutrient solution can be evenly applied to the treated area through the guide plate 92, improving collagen regeneration and repair effects. Simultaneously, the guide tube 23 ensures that the nutrient solution in the fluid supply unit 91 is completely delivered to the guide plate 92, preventing leakage of the nutrient solution inside the outer casing 1.

[0041] The propulsion drive assembly includes a stepper motor 93 and a push rod 94. The stepper motor 93 is electrically connected to the controller 6, and the push rod 94 is connected to the fluid supply device 91. The stepper motor 93 is used to drive the push rod 94 to push the nutrient solution in the fluid supply device 91 onto the liquid guide plate 92.

[0042] In this embodiment, the front end of the mounting base 51 of the treatment head 5, the front end of the cold head 81, and the front end of the liquid guiding plate 92 are flush with each other on the front end cover 2. The mounting base 51 is located between the cold head 81 and the liquid guiding plate 92. Thus, when the plasma skin treatment device treats the patient's skin, the front end cover 2 can slide on the patient's skin, allowing the treatment head 5, the cooling mechanism 8, and the nutrient solution supply mechanism 9 to act on the patient's skin respectively, thereby improving the efficiency and convenience of treatment.

[0043] In this embodiment, the treatment electrode assembly 52 includes a first treatment electrode assembly 52, a second treatment electrode assembly 52, a third treatment electrode assembly 52, and a fourth treatment electrode assembly 52. ​​That is, in this invention, four commonly used treatment heads 5 are exemplified to address different needs, thereby improving the applicability and practicality of the plasma skin treatment device.

[0044] Combination Figure 7 As shown, specifically, the first treatment electrode assembly 52 includes a first metal sheet 521 located within the receiving cavity 511.

[0045] In other words, high-density active particles are generated directly through the discharge of the first metal sheet 521, which is suitable for large-area sterilization and deep inflammation of the skin.

[0046] Combination Figure 8 As shown, the second treatment electrode assembly 52 includes a second metal sheet 522 and a first ceramic sheet 523 located within the receiving cavity 511. The first ceramic sheet 523 is attached to the side of the second metal sheet 522 away from the mounting base 51, and the outer edges of the first ceramic sheet 523 and the second metal sheet 522 are flush.

[0047] That is, by setting the first ceramic sheet 523 to form a dielectric barrier discharge, the discharge is more uniform and the temperature is reduced, making it suitable for sensitive skin areas, such as the eye area or thin skin areas.

[0048] Combination Figure 9 As shown, the third treatment electrode assembly 52 includes a third metal sheet 524 located within the receiving cavity 511, and the third metal sheet 524 has a tapered first protrusion 525 on the side away from the mounting base 51 and in the central region.

[0049] In other words, a local high electric field can be formed through the cone-shaped first protrusion 525, generating needle-shaped plasma beams, which are suitable for the precise treatment of dot-like pigmentation and small lesions.

[0050] Combination Figure 10As shown, the fourth treatment electrode assembly 52 includes a fourth metal plate 526 and a ceramic head 528 located in the receiving cavity 511. The fourth metal plate 526 has a tapered second protrusion 527 on the side away from the mounting base 51 and in the central region. The ceramic head 528 covers the second protrusion 527.

[0051] In other words, a local high electric field can be formed by the cone-shaped second protrusion 527, and the ceramic head 528 can be set to achieve both focusing and safety, making it suitable for delicate contours and sensitive skin areas.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A plasma skin therapy device, characterized in that, The device includes a housing, a front cover, a cold plasma generator, an inert gas supply mechanism, a treatment head, and a controller. The front cover is located at the front end of the housing. The cold plasma generator and the inert gas supply mechanism are both electrically connected to the controller, and all three are located inside the housing. The treatment head includes a mounting base and a treatment electrode assembly. The mounting base is detachably connected to the front cover. The front end of the mounting base has a receiving cavity, and the treatment electrode assembly is located inside the receiving cavity. The mounting base has a vent hole connecting the receiving cavity and the interior of the housing. The cold plasma generator is connected to and conductive with the treatment electrode assembly. The inert gas supply mechanism is used to introduce inert gas into the receiving cavity through the vent hole. The controller is configured such that when the cold plasma generator is started, the inert gas supply mechanism introduces inert gas into the containment cavity.

2. The plasma skin therapy device according to claim 1, characterized in that, The treatment head also includes a conductive sponge, which is disposed on the mounting base and located on the side of the treatment electrode assembly near the housing, and the cold plasma generator abuts against the conductive sponge.

3. The plasma skin therapy device according to claim 2, characterized in that, The mounting base has a cylindrical snap-fit ​​portion on the side near the outer shell, and a snap-fit ​​protrusion on the outer periphery of the snap-fit ​​portion. The front end cover has a mounting hole, and the front end of the outer shell has a snap-fit ​​hole that is directly opposite the mounting hole. The mounting base is located in the mounting hole and abuts against the front end of the outer shell. The snap-fit ​​portion is located in the snap-fit ​​hole, and the snap-fit ​​protrusion abuts against the inner wall of the snap-fit ​​hole. The conductive sponge is located in the snap-fit ​​portion, and the front end of the cold plasma generator extends into the snap-fit ​​portion and abuts against the conductive sponge.

4. The plasma skin treatment device according to claim 3, characterized in that, The plasma skin treatment device also includes a cylindrical clamp located inside the housing. The cold plasma generator is fixed inside the clamp, and the front end of the cold plasma generator extends from the front end of the clamp and passes into the snap-fit ​​portion.

5. The plasma skin treatment device according to claim 4, characterized in that, The inert gas supply mechanism includes a gas supply pump and a gas pipe. The gas supply pump is connected to the gas pipe and is electrically connected to the controller. The output end of the gas pipe faces the rear end of the clamp to deliver inert gas into the clamp.

6. The plasma skin therapy device according to claim 3, characterized in that, The front end cover is provided with a barrier on its front side, and the barrier is arranged around the outer periphery of the mounting hole along the edge of the mounting hole. A notch is provided at the end of the barrier away from the front end cover. An extension block is provided on the outer side of the mounting base. The extension block is located in the notch, and there is a gap between the extension block and the bottom of the notch.

7. The plasma skin treatment device according to claim 5, characterized in that, The plasma skin treatment device further includes a cooling mechanism, which includes a cold head, a thermoelectric cooling chip, and a heat pipe. The cold head and the heat pipe are located on opposite sides of the thermoelectric cooling chip. The cold head is mounted on the front end cover and protrudes from the front side of the front end cover. The front side of the cold head is flush with the front side of the mounting base. The heat pipe is fixed to the outside of the clamp and extends along the axial direction of the clamp. The thermoelectric cooling chip is electrically connected to the controller.

8. The plasma skin treatment device according to claim 7, characterized in that, The clamp has a vent on the side near the heat pipe.

9. The plasma skin therapy device according to claim 1, characterized in that, The plasma skin treatment device further includes a nutrient solution supply mechanism, which includes a fluid supply device, a propulsion drive assembly, and a fluid guide plate. The fluid supply device and the propulsion drive assembly are both located inside the housing. The fluid guide plate has multiple fluid guide holes evenly distributed on it and is located on the front end cover. The front end cover has a fluid guide cylinder on the side near the housing, and the fluid guide plate is located at one end of the fluid guide cylinder. The output end of the fluid supply device extends into the other end of the fluid guide cylinder. The propulsion drive assembly is connected to the fluid supply device to push the nutrient solution in the fluid supply device onto the fluid guide plate. The propulsion drive assembly is electrically connected to the controller.

10. The plasma skin therapy device according to claim 1, characterized in that, The therapeutic electrode assembly includes a first therapeutic electrode assembly, a second therapeutic electrode assembly, a third therapeutic electrode assembly, and a fourth therapeutic electrode assembly; The first therapeutic electrode assembly includes a first metal sheet located within the receiving cavity; The second treatment electrode assembly includes a second metal sheet and a first ceramic sheet located within the receiving cavity. The first ceramic sheet is attached to the side of the second metal sheet away from the mounting base, and the outer edges of the first ceramic sheet and the second metal sheet are flush. The third therapeutic electrode assembly includes a third metal sheet located within the receiving cavity, and the third metal sheet has a tapered first protrusion on the side away from the mounting base and in the central region. The fourth therapeutic electrode assembly includes a fourth metal plate and a ceramic head located within the receiving cavity. The fourth metal plate has a tapered second protrusion on the side away from the mounting base and in the central region, and the ceramic head covers the second protrusion.

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