Microneedle assembly

Abstract

The invention relates to the technical field of beauty instruments, in particular to a microneedle assembly. Comprising a microneedle suite, the microneedle suite comprises a connecting base and a microneedle piece arranged on the outer end face of the first end in the axial direction of the connecting base, and the microneedle piece comprises a substrate and a microneedle array arranged on the substrate; a mounting channel extending in the axial direction is formed in the adapter, one end, in the axial direction, of the adapter is opened to form a mounting opening, and an extending opening is formed in the other end of the adapter; the end, close to the mounting opening, of the adapter is configured to be in sealed connection with the beauty tool, the microneedle suite is mounted in the mounting channel from the mounting opening, and the microneedle array protrudes out of the outer end face of the adapter from the extending opening; the adapter and / or the microneedle kit are / is provided with a liquid outlet channel communicating the mounting channel with the end face of the end, provided with the extending opening, of the adapter. The adapter is introduced to serve as a middle connecting structure, one end of the adapter is matched with the connecting port of the beauty tool, the other end of the adapter is matched with the microneedle suite through the mounting channel, and the direct matching limitation of the microneedle suite and the connecting port of the beauty tool is broken through.

Description

Technical Field

[0001] This application relates to the field of beauty instrument technology, and in particular to a microneedle component. Background Technology

[0002] In the fields of beauty and skincare, as well as medical applications, microneedling devices are widely used because they can open channels in the stratum corneum of the skin through a microneedle array, promoting the absorption of active ingredients from beauty serums into the deeper layers of the skin. Existing microneedling devices typically consist of two parts: a microneedling kit and a beauty tool. The microneedling kit needs to connect to the beauty tool via a connector to ensure that the beauty serum can be successfully delivered to the microneedles and act on the skin.

[0003] However, currently available beauty serum storage bottles vary considerably in the shape and size of their connectors to meet different capacity requirements, appearance designs, and usage scenarios. In existing technologies, microneedle kits typically connect directly to the beauty serum storage bottle's connector via their own connector. To achieve a sealed connection and stable assembly, connectors of different shapes and sizes need to be specially designed and manufactured.

[0004] This design approach results in an extremely narrow compatibility range for individual microneedle kits, making them unsuitable for use with various sizes of beauty serum storage bottles and exhibiting poor compatibility. Furthermore, to accommodate different storage bottles, companies need to design, mold, and produce different connectors separately. Multiple mold-making processes not only increase R&D costs but also extend the product production cycle, significantly raising the production cost of a single microneedle kit and hindering large-scale production and market promotion. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a microneedle component.

[0006] This application provides a microneedle assembly, including: A microneedle kit, the microneedle kit including a connector and a microneedle sheet disposed on the end face of a first axial end of the connector, the microneedle sheet including a substrate and a microneedle array disposed on the substrate; An adapter is provided, wherein an axially extending mounting channel is formed inside the adapter, and one end of the adapter is open along the axial direction to form an mounting port, and the other end is provided with an extension port; the end of the adapter near the mounting port is configured to be sealed to the connection port of a beauty tool, the microneedle kit is installed into the mounting channel from the mounting port, and the microneedle array protrudes from the extension port from the outer end face of the adapter; The adapter and / or the microneedle kit are provided with a liquid outlet channel that connects the mounting channel to the end face of the adapter with the protrusion.

[0007] In some embodiments, the inner wall of the mounting channel is provided with a circumferentially arranged annular protrusion, which divides the mounting channel into a first mounting section near the mounting opening and a second mounting section near the protrusion. The microneedle kit is configured to be fixedly installed in the first mounting section from the mounting port, and can pass over the protrusion and enter the second mounting section under the action of external force. When the microneedle kit is fully inserted into the second mounting section, the microneedle array protrudes from the extension port from the outer end face of the adapter.

[0008] In some embodiments, the axial length of the first mounting segment is greater than the axial length of the microneedle kit, and the axial length of the second mounting segment is less than the axial length of the microneedle kit.

[0009] In some embodiments, the first mounting segment is configured as a tapered shape with a gradually decreasing diameter along the direction away from the mounting port, and the diameter of the end of the first mounting segment away from the mounting port is smaller than the diameter of the first end of the connector, so that the microneedle kit can be interference-fitted with the first mounting segment.

[0010] In some embodiments, the outer surface of the annular protrusion includes a first guide ramp facing the mounting port and a second guide ramp facing the protrusion. The first guide ramp and the second guide ramp intersect at the top of the annular protrusion. The first guide ramp is configured to guide the microneedle kit across the annular protrusion into the second mounting section, and the second guide ramp is configured to guide the microneedle kit out of the second mounting section in the opposite direction.

[0011] In some embodiments, a stop is provided on the inner wall of the installation channel, the stop being configured to restrict the microneedle kit to the rear side of the stop, and the stop being capable of breaking under external force to allow the microneedle kit to move forward to the protrusion.

[0012] In some embodiments, the liquid outlet channel includes a first liquid outlet channel extending axially through the connector, and a liquid outlet hole is formed on the substrate that is opposite to and communicates with the liquid outlet channel. The microneedle array includes solid microneedles and / or hollow microneedles. Alternatively, the liquid outlet channel includes a second liquid outlet channel formed on the adapter. One end of the second liquid outlet channel communicates with the mounting channel and forms a second liquid inlet. When the microneedle kit is installed in the second mounting section or moved forward to the protrusion, the second liquid inlet is offset from the microneedle kit. The other end of the second liquid outlet channel extends to the end face of the adapter with the protrusion and forms a second liquid outlet. Alternatively, the liquid outlet channel includes a second liquid outlet channel formed on the adapter and a first liquid outlet channel and a connecting channel formed on the connector. One end of the second liquid outlet channel communicates with the mounting channel and forms a second liquid inlet. When the microneedle kit is installed in the second mounting section or moved forward to the protrusion, the second liquid inlet is offset from the microneedle kit. The other end of the second liquid outlet channel extends to the inner sidewall of the adapter and communicates with the mounting channel to form a second liquid outlet. The first liquid outlet channel is axially arranged, with one end of the first liquid outlet channel near the microneedle sheet open and the other end closed. The connecting channel penetrates the connector along the wall thickness, with one end of the connecting channel communicating with the first liquid outlet channel and the other end communicating with the outer sidewall of the connector. When the microneedle kit is installed in the second mounting section or moved forward to the protrusion, the connecting channel and the second liquid outlet are opposite to each other and communicate with each other, and the second liquid outlet communicates with the gap of the microneedle array.

[0013] In some embodiments, the diameter of the protrusion is smaller than the diameter of the first end of the connector and larger than the diameter of the substrate, so that when the microneedle kit is installed in the second mounting section, the end face of the first end of the connector abuts against the inner end face of the end of the adapter where the protrusion is located.

[0014] In some embodiments, the axial length of the inner wall of the protrusion is greater than or equal to the thickness of the substrate, and the outer peripheral surface of the substrate is in a sealing fit with the inner wall of the protrusion.

[0015] In some embodiments, an internal thread is provided on the inner wall of the first mounting channel at one end near the mounting opening, and the internal thread is configured to engage with the connection thread of the beauty tool. Alternatively, one end of the adapter near the mounting port is configured to be inserted into the connection port of the beauty tool and sealed to the connection port; Alternatively, the mounting port may be configured for sealed insertion into the connection port of the beauty tool.

[0016] The technical solution provided in this application has the following advantages compared with the prior art: The microneedle assembly provided in this application introduces an adapter as an intermediate connection structure. One end of the adapter is adapted to the storage bottle connection port, and the other end is adapted to the microneedle kit via an installation channel, breaking through the direct adaptation limitation between the microneedle kit and the storage bottle connection port. The same microneedle kit can be adapted to various shapes and sizes of beauty tools by replacing different specifications of adapters, expanding the applicability of the microneedle kit and enhancing its versatility. There is no need to design and mold the connector of the microneedle kit separately for adapting to different storage bottles; only the adapter needs to be customized for different connection ports (the adapter structure is relatively simple, and the R&D and molding costs are lower), reducing the number of molding times, shortening the product R&D and production cycle, and reducing the overall production cost of a single microneedle kit, which is conducive to large-scale production and market promotion. At the same time, the assembly of the microneedle kit with the storage bottle through the adapter is more standardized, eliminating the need to adjust the assembly method of the microneedle kit for different storage bottles, improving assembly efficiency; for users, it can be flexibly used with different existing storage bottles, improving ease of use. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the microneedle assembly described in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the adapter described in Embodiment 1 of this application; Figure 3 for Figure 2 A magnified view of point A in the middle; Figure 4 This is a schematic diagram showing the usage state of the microneedle assembly described in Embodiment 1 of this application; Figure 5 This is a schematic diagram of the microneedle kit described in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the adapter described in Embodiment 2 of this application; Figure 7 This is a schematic diagram of the microneedle assembly described in Embodiment 2 of this application; Figure 8 This is a schematic diagram of the adapter described in Embodiment 3 of this application; Figure 9 This is a schematic diagram of the microneedle assembly described in Embodiment 3 of this application; Figure 10 This is a schematic diagram of the adapter described in Embodiment 4 of this application; Figure 11 This is a schematic diagram of the microneedle assembly described in Embodiment 4 of this application; Figure 12 This is a schematic diagram of the adapter described in Embodiment 5 of this application; Figure 13 This is a schematic diagram of the microneedle assembly described in Embodiment 5 of this application; Figure 14 This is a schematic diagram of the microneedle assembly described in Embodiment Six of this application; Figure 15 This is a schematic diagram of the microneedle assembly described in Embodiment Six of this application in its unused state; Figure 16 This is a schematic diagram of the structure of the microneedle component and the beauty tool described in Embodiment Six of this application; Figure 17 This is a schematic diagram of the adapter described in Embodiment Six of this application.

[0020] Among them, 1. Adapter; 11. Cover section; 12. Insertion section; 13. Annular protrusion; 131. First guide slope; 132. Second guide slope; 101. Installation channel; 101a. Installation port; 101b. Protrusion port; 1011. First installation section; 1012. Second installation section; 1011a. Mating section; 1011b. Threaded section; 14. Second liquid outlet channel; 141. Second liquid inlet; 142. Second liquid outlet; 2. Microneedle kit; 21. Connector; 211. First liquid outlet channel; 212. Connecting channel; 22. Microneedle sheet; 221. Substrate; 222. Microneedle array; 2211. Liquid outlet hole; 3. Beauty tools; 31. Extrusion section; 32. Threaded connection section. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0023] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 17 As shown in the embodiment of this application, the microneedle assembly includes a microneedle kit 2 and an adapter 1. The microneedle kit 2 includes a connector 21 and a microneedle piece 22. The connector 21 is integrally injection molded from an elastic material, specifically medical-grade liquid silicone, which combines good elastic sealing performance and biocompatibility, meeting the safety requirements of the beauty and skincare field. This material has good elasticity and biocompatibility, ensuring compatibility during assembly while avoiding irritation to human skin. The connector 21 has an overall cylindrical structure, with a circular mounting groove on its first axial end face. The microneedle piece 22 is fixed to the connector 21 through this circular mounting groove, achieving a stable connection between the two.

[0025] It should be noted that the connector 21 can also be made of a rigid material. For example, when the adapter 1 is made of an elastic material, the connector 21 is made of a rigid material, or the adapter 1 is made of a rigid material and the connector 21 is made of an elastic material, or both are made of rigid materials, or both are made of elastic materials.

[0026] The shape of the connector 21 can also be a quadrangular prism or other shapes. Here, there is no limitation on the specific shape of the connector 21.

[0027] Reference Figure 5 As shown in the schematic diagram of the microneedle kit in Embodiment 1, the liquid outlet channel includes a first liquid outlet channel 211 extending axially through the connector 21. The microneedle sheet 22 includes a substrate 221 and a microneedle array 222 disposed on the substrate 221. The microneedle array 222 consists of multiple microneedles evenly distributed, and all microneedles are solid microneedles with a height of 10 micrometers to 100 micrometers. The substrate 221 is a rectangular or circular sheet structure. The substrate 221 and the microneedle array 222 are integrally molded from a biodegradable material. The substrate 221 is fixed to the connector 21 by adhesive or double-sided adhesive. The microneedle array 222 is located on the side of the substrate 221 facing away from the connector 21. The substrate 221 is provided with a liquid outlet hole 2211 that is coaxial with and communicates with the first liquid outlet channel 211.

[0028] In practice, the substrate 221 is a rectangular or circular sheet structure, and the substrate 221 and the microneedle array 222 are integrally molded from a biodegradable material. It can be understood that the substrate 221 can also be a rectangular sheet structure or other shapes.

[0029] The adapter 1 has an axially extending mounting channel 101 inside, and one end of the adapter 1 is open along the axis to form a mounting port 101a, while the other end has an extension port 101b. The end of the adapter 1 near the mounting port 101a is configured to be sealed to the connection port of the beauty tool 3. The microneedle kit 2 is installed into the mounting channel 101 from the mounting port 101a, and the microneedle array 222 protrudes from the extension port 101b from the outer end face of the adapter 1.

[0030] One end of the adapter 1 is open along the axial direction to form an installation port 101a. The inner wall of the installation port 101a is provided with internal threads for threaded sealing connection with the connection port of the beauty tool 3 with external threads. To further improve the sealing performance, a rubber sealing ring is also embedded at the end of the installation port 101a. When the storage bottle connection port is tightened with the adapter 1, the sealing ring can fit tightly against the contact surface of the two to prevent the beauty liquid from leaking.

[0031] The beauty tool 3 can be a storage bottle containing beauty essence, such as an ampoule, ampoule, or single-use bottle; it can also be a beauty instrument, such as a manual or electric beauty device; or it can be a syringe or injection pump. In the embodiments below, for the sake of clarity in describing the structure of the microneedle component, the beauty tool is exemplified as a storage bottle, with the bottle opening serving as the connection port. Those skilled in the art will understand that the microneedle component is equally applicable when the beauty tool 3 is replaced with a manual or electric beauty device, or a syringe, injection pump, or similar structure.

[0032] The other end of the adapter 1 is provided with an extension port 101b. The inner diameter of the extension port 101b is smaller than the inner diameter of the installation channel 101, forming a stepped structure. This stepped structure can limit the microneedle kit 2 and prevent the microneedle kit 2 from extending excessively into the adapter 1. When the microneedle kit 2 is installed into the installation channel 101 from the installation port 101a, the microneedle array 222 on one side of the microneedle plate 22 protrudes from the extension port 101b onto the outer end face of the adapter 1, ensuring that the microneedles can effectively contact the skin and pierce the stratum corneum.

[0033] During assembly, the microneedle 22 is first fixed to the connector 21 through the circular mounting groove to form a complete microneedle kit 2; then, according to the thread specification at the bottle mouth of the storage bottle, the corresponding internal thread adapter 1 is selected, and the microneedle kit 2 is inserted into the mounting channel 101 from the mounting port 101a of the adapter 1 until the end of the connector 21 of the microneedle kit 2 fits against the stepped structure of the adapter 1, thus completing the assembly of the entire microneedle assembly. Finally, the adapter 1 is tightened and fixed to the external thread of the bottle mouth through the internal thread of the mounting port 101a.

[0034] In use, pressing the storage bottle or relying on gravity, the beauty essence inside is delivered through the first dispensing channel 211 on the connector 21 to the dispensing hole 2211 of the microneedle plate 22. It then penetrates to the skin surface through the gaps in the microneedle array 222. Simultaneously, the protruding microneedles 222 pierce the stratum corneum, promoting the absorption of the beauty essence's active ingredients into the deeper layers of the skin, achieving a skincare effect. When different sizes of beauty tools 3 are needed, simply replace the adapter 1 with the corresponding mounting port 101a.

[0035] It should be noted that the sealing connection between adapter 1 and the bottle neck of the storage bottle can also take other forms, such as... Figures 14 to 17 As shown, the adapter 1 may include a cap section 11 and a plug section 12. The plug section 12 is inserted into the bottle neck and seals with it. The cap section 11 is located outside the bottle neck, sealing it. An installation channel 101 passes through the plug section 12 and the cap section 11. An installation port 101a is formed at the free end of the plug section 12, and an extension port 101b is formed at the free end of the cap section 11. In this embodiment, both the cap section 11 and the plug section 12 may be made of elastic material, or the plug section 12 may be made of elastic material and the cap section 11 may be made of rigid material.

[0036] Alternatively, the adapter 1 may be made of elastic materials such as silicone, and the mounting port 101a of the adapter 1 may be tightly fitted onto the outer wall of the connection port of the beauty tool 3.

[0037] For example, such as Figures 14 to 17 In the sixth embodiment shown, the adapter 1 includes a cover section 11 and a plug section 12. The cover section 11 and the plug section 12 are integrally formed. The installation channel 101 extends through the adapter 1 axially. The installation port 101a is formed at the free end of the plug section 12, and the protrusion port 101b is formed at the free end of the cover section 11. In use, the plug section 12 is inserted into the connection port of the beauty tool 3, and the cover section 11 is located outside the connection port to seal the connection port.

[0038] Alternatively, the adapter 1 can be made of plastic, and the mounting port 101a of the adapter 1 can be inserted into the outer wall of the connection port of the beauty tool 3 by means of a snap or other interference fit.

[0039] The microneedle assembly provided in this application introduces an adapter 1 as an intermediate connection structure. One end of the adapter 1 is adapted to the bottle opening of the storage bottle, and the other end is adapted to the microneedle kit 2 through the mounting channel 101, breaking through the direct adaptation limitation between the microneedle kit 2 and the storage bottle connection. The same microneedle kit 2 can be adapted to various shapes and sizes of beauty tools 3 by replacing the adapter 1 with different specifications, expanding the applicability of the microneedle kit 2 and enhancing its versatility. There is no need to design and mold the connector 21 of the microneedle kit 2 separately for adapting to different storage bottles. Only the adapter 1 needs to be customized for different connection ports (the structure of the adapter 1 is relatively simple, and the research and development and molding costs are lower), reducing the number of molding times, shortening the product research and development and production cycle, reducing the overall production cost of a single microneedle kit 2, and facilitating large-scale production and market promotion. At the same time, the assembly of the microneedle kit 2 with the storage bottle through the adapter 1 is more standardized, without the need to adjust the assembly method of the microneedle kit 2 for different storage bottles, improving assembly efficiency; for users, it can be flexibly used with different existing storage bottles, improving the convenience of use.

[0040] Furthermore, in order to protect the microneedle sheet 22 during transportation and before use, the microneedle sheet 22 can be hidden in the installation channel 101 before the microneedle assembly is unpacked. When in use, the microneedle sheet 22 is pushed forward by external force so that the microneedle array 222 of the microneedle sheet 22 protrudes from the protrusion 101b from the outer end face of the adapter 1.

[0041] Specifically, refer to Figure 2 and Figure 3 As shown, in some embodiments of this application, the inner wall of the mounting channel 101 is provided with a ring-shaped protrusion 13 arranged circumferentially. The ring-shaped protrusion 13 divides the mounting channel 101 into a first mounting section 1011 near the mounting port 101a and a second mounting section 1012 near the protrusion port 101b. During the installation of the microneedle assembly, the microneedle kit 2 first enters the first mounting section 1011 from the mounting port 101a. Since the connector 21 of the microneedle kit 2 is made of elastic material and the connector 21 is designed to be interference-fitted with the first mounting section 1011, the connector 21 can be fixed in the first mounting section 1011 by the inner wall of the first mounting section 1011 pressing the connector 21. At this time, the microneedle array 222 does not protrude from the outer end face of the adapter 1. Because the connector 21 is made of an elastic material, when an external force presses the end of the connector 21 away from the microneedle piece 22, the connector 21 can undergo elastic deformation, thereby allowing it to pass over the annular protrusion 13 and enter the second mounting section 1012. When the microneedle kit 2 is fully inserted into the second mounting section 1012, the end of the connector 21 away from the microneedle piece 22 is fitted and limited by the limiting step surface of the annular protrusion 13. At this time, the microneedle array 222 just protrudes from the extension port 101b from the outer end face of the adapter 1, ensuring that the microneedles can effectively contact the skin and pierce the stratum corneum.

[0042] In this embodiment, the mounting channel 101 is divided into a first mounting section 1011 and a second mounting section 1012 by the annular protrusion 13. When not in use, the microneedle kit 2 can be pre-fixed in the first mounting section 1011. At this time, the microneedle array 222 does not protrude from the outer end face of the adapter 1, which can effectively prevent the microneedles from being damaged by collision during transportation. At the same time, it can prevent the microneedles from being exposed to the air before use, which would affect hygiene, and prevent users from accidentally touching the microneedles and causing punctures, thus significantly improving the safety of the product.

[0043] The first installation section 1011 and the connector 21 of the microneedle kit 2 are pre-fixed by an interference fit, which can prevent the microneedle kit 2 from loosening or shifting during transportation or when not in use. After the microneedle kit 2 is fully inserted into the second installation section 1012, the connector 21 fits and limits the annular protrusion 13, which can precisely limit the installation position of the microneedle kit 2 and ensure that the length of the microneedle array 222 protruding from the outer end face of the adapter 1 is consistent. This avoids the effect of beauty serum introduction or excessive damage to the skin due to the deviation of the microneedle protrusion length, and ensures the stability of the effect.

[0044] The annular protrusion 13 is integrally formed with the adapter 1, eliminating the need for additional complex components. The structural design is simple and does not significantly increase the difficulty of R&D, mold making, and production of the adapter 1. While improving product performance, it can effectively control production costs and facilitate large-scale production.

[0045] Furthermore, the axial length of the first mounting section 1011 is greater than the axial length of the microneedle kit 2, and the axial length of the second mounting section 1012 is less than the axial length of the microneedle kit 2. When the microneedle kit 2 is inserted into and fixedly installed in the first mounting section 1011 through the mounting port 101a, the microneedle kit 2 can be completely embedded inside the first mounting section 1011 because the first mounting section 1011 has a longer axial length. The outer surface of the connector 21 can achieve a long-range fit with the inner wall of the first mounting section 1011, further improving the firmness of the pre-fixation and preventing the microneedle kit 2 from shaking locally in the first mounting section 1011. At the same time, after the microneedle kit 2 is fully embedded, the end away from the microneedle piece 22 does not exceed the mounting port 101a of the adapter 1, which facilitates subsequent assembly operations.

[0046] When the microneedle kit 2 passes over the annular protrusion 13 and enters the second mounting section 1012 under external force, because the axial length of the second mounting section 1012 is slightly smaller than the axial length of the microneedle kit 2, the microneedle kit 2 is completely inserted into the second mounting section 1012 under external force. It is then compressed axially by the end of the adapter 1 and the annular protrusion 13, thus confining the microneedle kit 2 within the second mounting section 1012. This design prevents the microneedle kit 2 from axially shifting within the second mounting section 1012, while precisely controlling the length of the microneedle array 222 protruding from the outer end face of the adapter 1 to remain within a reasonable range, ensuring consistent performance.

[0047] The first mounting section 1011 is configured as a tapered shape with a gradually decreasing diameter along the direction away from the mounting opening 101a, and the diameter of the end of the first mounting section 1011 away from the mounting opening 101a is smaller than the diameter of the first end of the connector 21, so that the microneedle kit 2 can be interference-fitted with the first mounting section 1011.

[0048] The annular protrusion 13 smoothly connects with the end of the first mounting section 1011 furthest from the mounting port 101a. During assembly, the microneedle kit 2 is inserted into the mounting port 101a of the adapter 1. Since the inner diameter of the first mounting section 1011 near the mounting port 101a is slightly larger, initial positioning can be easily achieved. As the microneedle kit 2 advances axially away from the mounting port 101a, the inner diameter of the first mounting section 1011 gradually decreases. The connecting seat 21 (made of elastic medical-grade silicone) is subjected to radial compression from the tapering inner wall, gradually undergoing uniform elastic deformation. Finally, when the microneedle kit 2 is fully embedded in the first mounting section 1011, the outer surface of the connecting seat 21 and the tapering inner wall of the first mounting section 1011 achieve a full-length tight fit, forming a stable interference fit. At this point, one end of the microneedle piece 22 of the microneedle kit 2 is close to the annular protrusion 13 but does not cross it, and the microneedle array 222 still does not protrude from the outer end face of the adapter 1, maintaining a pre-fixed protective state.

[0049] Furthermore, in some embodiments of this application, such as Figure 2 and Figure 4As shown, the first mounting section 1011 is further divided into a threaded section 1011b and a mating section 1011a arranged sequentially along the axial direction. The mating section 1011a is located between the second mounting section 1012 and the threaded section 1011b. The threaded section 1011b is located close to the mounting opening 101a, and the mating section 1011a is located at the end of the first mounting section 1011 away from the mounting opening 101a. The diameter of the mating section 1011a is slightly larger than the diameter of the connecting seat 21, and the axial length of the mating section 1011a can be made smaller than the length of the connecting seat 21. The microneedle kit 2 only partially fits the mating section 1011a with an interference fit, and the rest is located within the threaded section 1011b but does not protrude from the mounting opening 1012. 1a. When assembling with the storage bottle, the bottle mouth is inserted into the threaded section 1011b and continuously screwed forward. When the end of the bottle mouth abuts against the outer end face of the connector 21, the storage bottle begins to continuously squeeze the connector 21. Under the squeezing force of the bottle mouth, the connector 21 passes over the annular protrusion 13 and enters the second mounting section 1012 until the front end face of the connector 21 abuts against the stepped surface around the protrusion 101b. At this time, the microneedle kit 2 is completely inserted into the second mounting section 1012, and the microneedle array 222 protrudes from the protrusion 101b from the front end face of the adapter. The rear end of the connector 21 abuts against the front end face of the bottle mouth to achieve a limit and prevent the connector 21 from moving axially.

[0050] The storage bottle includes a bottle body section, a threaded connection section 32, and a compression section 31 arranged sequentially along the axial direction. The compression section 31 is located near the bottle mouth, and the threaded connection section 32 is located between the bottle body section and the compression section 31. When the storage bottle is assembled with the microneedle assembly, the compression section 31 enters the first mounting section 1011 from the mounting port 101a. When the compression section 31 abuts against the rear end face of the connecting seat 21, the storage bottle compresses the connecting seat 21 and the microneedle assembly 2, causing them to pass over the annular protrusion 13 and enter the second mounting section 1012. During this process, the threaded connection section 32 cooperates with the threaded section 1011b, and the storage bottle rotates and moves forward until the microneedle assembly 2 is completely inserted into the second mounting section 1012. At this time, the compression section 31 abuts against the rear end of the connecting seat 21, and the bottle mouth is coaxial and connected with the first liquid outlet channel 211 in the connecting seat 21.

[0051] Furthermore, in some embodiments of this application, such as Figure 3 As shown, the outer surface of the annular protrusion 13 includes a first guide slope 131 facing the mounting port 101a and a second guide slope 132 facing the protrusion port 101b. The first guide slope 131 and the second guide slope 132 intersect at the top of the annular protrusion 13. The first guide slope 131 is configured to guide the microneedle kit 2 across the annular protrusion 13 into the second mounting section 1012, and the second guide slope 132 is configured to guide the microneedle kit 2 out of the second mounting section 1012 in the opposite direction.

[0052] The outer surface of the annular protrusion 13 is composed of a first guide slope 131 facing the mounting port 101a and a second guide slope 132 facing the protrusion port 101b. The two slopes intersect at the top of the annular protrusion 13 to form a smooth pointed structure. The angle α between the first guide slope 131 and the axis of the mounting channel 101 is designed to be 30°~45°. This angle range can maximize the reduction of the guiding resistance when the microneedle kit 2 enters the second mounting section 1012 while ensuring the structural strength of the annular protrusion 13. The angle β between the second guide slope 132 and the axis of the mounting channel 101 is designed to be 35°~50°, which is slightly larger than the first guide slope 131. This facilitates the reverse withdrawal of the microneedle kit 2 and ensures the limiting stability of the microneedle kit 2 when it is working in the second mounting section 1012.

[0053] The lower end of the first guide slope 131 is smoothly connected to the inner wall of the first mounting section 1011 away from the mounting port 101a, and the upper end extends to the top of the annular protrusion 13; the lower end of the second guide slope 132 is smoothly connected to the inner wall of the second mounting section 1012 near the annular protrusion 13, and the upper end also converges to the top. When the microneedle kit 2 moves toward the second mounting section 1012 under the action of external force, the end of the connector 21 first contacts the first guide slope 131. The first guide slope 131 decomposes the axial pressure into a radial compressive force through the slope guide, causing the connector 21 to slowly undergo elastic deformation along the slope direction and smoothly pass over the top of the annular protrusion 13 and enter the second mounting section 1012. When it is necessary to withdraw the microneedle kit 2 in the reverse direction from the second mounting section 1012, a reverse pulling force is applied, and the connector 21 contacts the second guide slope 132. Similarly, the second guide slope 132 decomposes the axial pulling force into a radial release force, guiding the connector 21 to recover its elastic deformation and smoothly withdraw into the first mounting section 1011.

[0054] It should be noted that both guide bevels are polished to ensure a smooth, burr-free surface, preventing scratches on the outer surface of the connector 21 during the movement of the microneedle kit 2, and ensuring the elasticity and sealing reliability of the connector 21. Meanwhile, the annular protrusion 13 is made of the same material as the adapter 1 and is integrally injection molded to ensure the connection accuracy between the first and second guide bevels 132 and the installation channel 101, preventing assembly gaps from affecting the guiding effect.

[0055] In some embodiments of this application, the inner diameter of the annular protrusion 13 is larger than the diameter of the protrusion 101b, and both the inner diameter of the annular protrusion 13 and the diameter of the protrusion 101b are smaller than the diameter of the connecting seat 21, so that the connecting seat 21 can pass through the annular protrusion 13 but cannot pass out from the protrusion 101b.

[0056] Furthermore, in some embodiments of this application, a stop is provided on the inner wall of the mounting channel 101. The stop is configured to restrict the microneedle kit to the rear side of the stop, and the stop can break under external force to allow the microneedle kit to move forward to the protrusion.

[0057] The stop part and the adapter 1 are integrally injection molded from the same material. It is set on the inner wall of the installation channel 101 and near the protrusion 101b. There are 3-4 stop protrusions (preferably 3, to balance the limiting stability and the ease of breakage) evenly distributed along the circumference of the installation channel 101. The gap angle between adjacent stop protrusions is 90°-120° to ensure that the stop part as a whole has sufficient initial limiting strength, while avoiding affecting the flow of beauty liquid. The breaking strength of the stop is precisely designed and set at 5-8N (this force range can withstand minor collisions during transportation and assembly, preventing accidental breakage of the stop and premature movement of the microneedle kit 2, while also ensuring that the user can achieve breakage by manually applying axial pressure without the need for additional tools). The side of the stop near the mounting port 101a forms a stop end face, which is perpendicular to the axis of the mounting channel 101. After the microneedle kit 2 is assembled, the end face of the connector 21 near the microneedle piece 22 fits against the stop end face, and the stop restricts the microneedle kit 2 to its rear side (the side near the mounting port 101a). At this time, the microneedle array 222 does not protrude from the protrusion 101b of the adapter 1 and is in a safe protective state.

[0058] It should be noted that the end face of the stop is rounded to avoid sharp edges scratching the outer surface of the connector 21. At the same time, a weakening groove is provided at the connection between the stop and the inner wall of the installation channel 101. This weakening groove can concentrate the stress at the connection when external force is applied, ensuring that the stop can break precisely along the weakening groove, and avoiding irregular debris remaining in the installation channel 101 after breakage, which may affect the delivery of beauty liquid or scratch the connector 21.

[0059] It should be noted that the stop part can also be set as a ring. A weakening groove is provided at the connection between the stop part and the installation channel 101. The weakening groove can concentrate the stress at the connection when external force is applied, ensuring that the stop part can break precisely along the weakening groove, and avoiding irregular debris remaining in the installation channel 101 after breakage, which may affect the delivery of beauty liquid or scratch the connector 21.

[0060] In use: Apply axial pressure (5-8N) to the end of the connector 21 of the microneedle kit 2, and the stop will break precisely along the weakening groove; continue to apply pressure to push the microneedle kit 2 forward until the microneedle array 222 protrudes from the protrusion 101b; press the storage bottle, and the beauty solution will be delivered to the microneedle array 222 through the first liquid outlet channel 211 of the connector 21 to achieve the introduction of effective ingredients; after use, if the microneedle kit 2 is a disposable design, it can be discarded directly; if it is a replaceable design, a new microneedle kit 2 can be replaced and reassembled for use.

[0061] Furthermore, in some embodiments of this application, the diameter of the protrusion 101b is smaller than the diameter of the first end of the connector 21 and larger than the diameter of the substrate 221, so that when the microneedle kit 2 is installed on the second mounting section 1012, the end face of the first end of the connector 21 abuts against the inner end face of the end of the adapter 1 with the protrusion 101b.

[0062] The diameter of the protrusion 101b is smaller than the diameter of the first end of the connector 21 but larger than the diameter of the substrate 221, so that the substrate 221 and the microneedle array 222 on the substrate 221 can protrude from the protrusion 101b, while the connector 21 cannot protrude from the protrusion 101b. One end of the adapter 1 with the protrusion 101b forms an annular inner end face (on the side near the mounting channel 101), which is perpendicular to the axis of the mounting channel 101, ensuring a tight fit with the end face of the first end of the connector 21. When the microneedle kit 2 is installed in the second mounting section 1012, because the diameter of the protrusion 101b is smaller than the diameter of the first end of the connector 21, the first end of the connector 21 cannot pass through the protrusion 101b and will precisely abut against the inner end face of the ring, forming a reliable axial limit. At the same time, the diameter of the substrate 221 is smaller than the diameter of the protrusion 101b, and the substrate 221 of the microneedle sheet 22 and the microneedle array 222 above it can smoothly pass through the protrusion 101b and protrude from the outer end face of the adapter 1. Through the abutment and limit between the connector 21 and the inner end face, the protruding length of the microneedle array 222 is precisely controlled within a reasonable range to meet the skin infusion requirements. At the same time, after the end face of the first end of the connector 21 fits against the inner end face of the adapter 1, a surface contact seal is formed, which can help prevent the beauty fluid from leaking from the gap between the connector 21 and the mounting channel 101, improving the reliability of the seal.

[0063] Furthermore, the axial length of the inner wall of the protrusion 101b is greater than or equal to the thickness of the substrate 221, and the outer peripheral surface of the substrate 221 is sealed to the inner wall of the protrusion 101b. It should be noted that an annular gap is reserved between the substrate 221 and the inner wall of the protrusion 101b. This annular gap serves as a sealing space, and adhesive or a sealing ring is applied within this annular gap to achieve a sealed fit between the outer peripheral surface of the substrate 221 and the inner wall of the protrusion 101b. Simultaneously, the end face of the first end of the connecting seat 21 forms a surface contact seal after fitting with the inner end face of the adapter 1, which helps to prevent leakage of cosmetic fluid from the mating gap between the connecting seat 21 and the installation channel 101, thus improving sealing reliability.

[0064] The sealing methods of the connection ports between different types of adapters 1 and beauty tools 3 also differ, see reference... Figure 4 As shown, the inner wall of the mounting channel 101 is provided with an internal thread at one end near the mounting port 101a, and the internal thread is configured to engage with the connection thread of the beauty tool 3.

[0065] As mentioned above, the first mounting section 1011 is further divided into a threaded section 1011b and a mating section 1011a arranged sequentially along the axial direction. The mating section 1011a is located between the second mounting section 1012 and the threaded section 1011b. The threaded section 1011b is located close to the mounting opening 101a, and the mating section 1011a is located at the end of the first mounting section 1011 away from the mounting opening 101a. The storage bottle includes a bottle body section, a threaded connection section 32, and a compression section 31 arranged sequentially along the axial direction. The compression section 31 is located near the bottle mouth, and the threaded connection section 32 is located between the bottle body section and the compression section 31. When the storage bottle is assembled with the microneedle assembly, the compression section 31 enters the first mounting section 1011 from the mounting port 101a. When the compression section 31 abuts against the rear end face of the connecting seat 21, the storage bottle compresses the connecting seat 21 and the microneedle assembly 2, causing them to pass over the annular protrusion 13 and enter the second mounting section 1012. During this process, the threaded connection section 32 cooperates with the threaded section 1011b, and the storage bottle rotates and moves forward until the microneedle assembly 2 is completely inserted into the second mounting section 1012. At this time, the compression section 31 abuts against the rear end of the connecting seat 21, and the bottle mouth is coaxial and connected with the first liquid outlet channel 211 in the connecting seat 21.

[0066] Alternatively, the adapter 1 includes a cover section 11 and a plug section 12, with the cover section 11 and the plug section 12 integrally formed. The installation channel 101 extends through the adapter 1 axially, with an installation port 101a formed at the free end of the plug section 12 and an extension port 101b formed at the free end of the cover section 11. In use, the plug section 12 is inserted into the connection port of the beauty tool 3, and the cover section 11 is located outside the connection port to seal it.

[0067] Furthermore, in order to enable the microneedle assembly to dispense liquid during use, a liquid dispensing channel can be provided on the adapter 1 or the microneedle kit, connecting the mounting channel 101 to the end face of the adapter 1 with the protrusion 101b. Specifically, the method described in Embodiment 1 above, in which a first liquid dispensing channel 211 is provided on the microneedle kit 2, can be adopted. Alternatively, the microneedle kit 2 can be made into a solid structure, that is, the microneedle kit 2 is only used for drilling holes and not for dispensing liquid. Or, the liquid dispensing hole 2211 is still provided on the microneedle kit 2, but a second liquid dispensing channel 14 is provided on the side wall of the adapter 1 and connected to the first liquid dispensing channel 211 on the microneedle kit 2, so as to realize the synchronous flow of beauty essence during use.

[0068] The microneedle array 222 includes solid microneedles and / or hollow microneedles. When solid microneedles are used, they are only used for creating pores and not for dispensing liquid. When hollow microneedles are used, they are connected to the liquid dispensing channel, allowing the beauty liquid to flow out. The hollow microneedles can both create pores and dispense liquid. It should be noted that hollow and solid microneedles can be used in combination or individually.

[0069] Specifically, refer to Figure 6 and Figure 7 As shown in Embodiment 2 of this application, the microneedle kit 2 is configured as a solid structure. The liquid outlet channel includes a second liquid outlet channel 14 formed on the adapter 1. Specifically, the second liquid outlet channel 14 is provided on the side wall of the adapter 1. The two ends of the second liquid outlet channel 14 are a second liquid inlet 141 and a second liquid outlet 142, respectively. The second liquid inlet 141 is located on the inner wall of the mating section 1011a and communicates with the mating section 1011a. The second liquid outlet 142 is located on the end face of the adapter 1 at the end with the protrusion 101b. When used with a beauty tool, the end of the connection port is located on the side of the second liquid inlet 141 away from the annular protrusion 13, so as to ensure that the beauty liquid flowing out of the connection port can flow out through the second liquid inlet 141, the second liquid outlet channel 14, and the second liquid outlet 142. Furthermore, the upper edge of the second liquid inlet 141 is aligned with or has a small gap with the lower edge of the microneedle kit 2. This prevents the beauty liquid flowing out from the connection port from accumulating in the installation channel 101 and being unable to be discharged from the second liquid inlet 141, thus avoiding waste.

[0070] Furthermore, to facilitate liquid dispensing, continue to refer to... Figure 6 and Figure 7 As shown, a chamfer is provided at the corner near the second liquid inlet 141 to increase the flow rate at the corner.

[0071] Reference Figure 8 and Figure 9As shown, Embodiment 3 of this application is similar to Embodiment 2, and the same parts will not be repeated. The difference between the two is that in Embodiment 3, the end face of the adapter 1 located inside the second liquid outlet 142 is lower than the end face of the adapter 1 located outside the second liquid outlet 142, so that the outer ring of the adapter 1 forms a baffle, and the gap between the second liquid outlet 142 and the microneedle array is connected, so that the beauty liquid can only flow inward to the position of the microneedle kit 2.

[0072] Reference Figure 10 and Figure 11 As shown in Embodiment 4 of this application, the microneedle kit 2 has a hollow structure. The liquid outlet channel includes a second liquid outlet channel 14 formed on the adapter, and a first liquid outlet channel 211 and a connecting channel 212 formed on the connecting seat 21. The microneedle kit 2 is provided with the first liquid outlet channel 211 along the axial direction. The first liquid outlet channel 211 is open at one end near the microneedle sheet 22 and closed at the other end. A liquid outlet hole 2211 is formed on the substrate 221. The connecting seat 21 is provided with the connecting channel 212 on the side wall. The connecting channel 212 penetrates the connecting seat 21 along the thickness direction of the side wall of the connecting seat 21, so that one end of the connecting channel 212 is connected to the first liquid outlet channel 211 and the other end is connected to the outer side wall of the connecting seat 21. A second liquid outlet channel 14 is provided on the side wall of the adapter 1. The second liquid inlet 141 of the second liquid outlet channel 14 is located on the inner wall of the mating section 1011a and communicates with the mating section 1011a. The second liquid outlet channel 14 extends radially outward from the second liquid inlet 141, then extends axially towards the second mounting section 1012, and finally extends radially inward to the side wall of the second mounting section 1012, forming a second liquid outlet 142 on the side wall of the second mounting section 1012. When the microneedle kit 2 passes over the annular protrusion 13 and enters the second mounting section 1012, the connecting channel 212 is directly opposite the second liquid outlet 142. The connecting channel 212 connects the second liquid outlet channel 14 and the first liquid outlet channel 211 in the microneedle kit 2, thereby realizing liquid outlet. Similar to Embodiment 2, when used with a beauty tool, the end of the connector is located on the side of the second liquid inlet 141 away from the annular protrusion 13.

[0073] Reference Figure 12 and Figure 13As shown, in Embodiment 5 of this application, Embodiment 5 is similar to Embodiment 4, and the same parts will not be repeated. The difference between the two is that in Embodiment 5, the side wall of the adapter 1 is recessed radially outward to form a second liquid outlet channel 14. The second liquid outlet channel 14 covers part of the inner wall of the mating section 1011a and part of the inner wall of the second mounting section 1012 along the axial direction of the adapter 1. When the microneedle kit 2 passes over the annular protrusion 13 and is completely installed into the second mounting section 1012, the connecting channel 212 is directly opposite to and connected to the second liquid outlet channel 14 to ensure that the beauty liquid in the second liquid outlet channel 14 can enter the first liquid outlet channel 211 through the connecting channel 212. When setting the second liquid outlet channel 14, recesses can be spaced out circumferentially on the side wall of the adapter 1 to form multiple second liquid outlet channels 14. The number of connecting channels 212 on the microneedle kit 2 is equal to and corresponds one-to-one with the number of second liquid outlet channels 14. Alternatively, the side wall of the adapter 1 can be recessed circumferentially to form an annular second liquid outlet channel 14, and one or more connecting channels 212 on the connector of the microneedle kit 2 can be connected to the annular second liquid outlet channel 14. Similar to Embodiment 4, when used with a beauty tool, the end of the connector is located on the side of the second liquid inlet 141 away from the annular protrusion 13.

[0074] It should be noted that the extension direction of the second liquid outlet channel 14 does not strictly follow the radial and axial directions. It can be slightly inclined or bent relative to the radial or axial directions. In other words, there is no specific limitation on the shape and extension path of the second liquid outlet channel 14, as long as the second liquid inlet 141 can be connected to the connection port and the end face of the second liquid outlet 142 connected to the adapter 1 can discharge liquid when drilling.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0076] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A microneedle assembly, characterized in that, include: A microneedle kit, the microneedle kit including a connector and a microneedle sheet disposed on the outer end face of a first axial end of the connector, the microneedle sheet including a substrate and a microneedle array disposed on the substrate; An adapter is provided, wherein an axially extending mounting channel is formed inside the adapter, and one end of the adapter is open along the axial direction to form an mounting port, and the other end is provided with an extension port; the end of the adapter near the mounting port is configured to be sealed to a beauty tool, the microneedle kit is installed into the mounting channel from the mounting port, and the microneedle array protrudes from the extension port from the outer end face of the adapter; The adapter and / or the microneedle kit are provided with a liquid outlet channel that connects the mounting channel to the end face of the adapter with the protrusion.

2. The microneedle assembly according to claim 1, characterized in that, The inner wall of the installation channel is provided with a ring-shaped protrusion arranged circumferentially, which divides the installation channel into a first installation section near the installation opening and a second installation section near the protrusion opening. The microneedle kit is configured to be fixedly installed in the first mounting section from the mounting port, and can pass over the protrusion and enter the second mounting section under the action of external force. When the microneedle kit is fully inserted into the second mounting section, the microneedle array protrudes from the extension port from the outer end face of the adapter.

3. The microneedle assembly according to claim 2, characterized in that, The axial length of the first mounting segment is greater than the axial length of the microneedle kit, and the axial length of the second mounting segment is less than the axial length of the microneedle kit.

4. The microneedle assembly according to claim 2, characterized in that, The first mounting segment is configured as a tapered shape with a gradually decreasing diameter along the direction away from the mounting opening, and the diameter of the end of the first mounting segment away from the mounting opening is smaller than the diameter of the first end of the connector, so that the microneedle kit can be interference-fitted with the first mounting segment.

5. The microneedle assembly according to claim 2, characterized in that, The outer side of the annular protrusion includes a first guide slope facing the mounting port and a second guide slope facing the protrusion. The first guide slope and the second guide slope intersect at the top of the annular protrusion. The first guide slope is configured to guide the microneedle kit across the annular protrusion into the second mounting section, and the second guide slope is configured to guide the microneedle kit out of the second mounting section in the opposite direction.

6. The microneedle assembly according to claim 1, characterized in that, The inner wall of the installation channel is provided with a stop, which is configured to restrict the microneedle kit to the rear side of the stop, and the stop can break under external force to allow the microneedle kit to move forward to the protrusion.

7. The microneedle assembly according to claim 5, characterized in that, The liquid outlet channel includes a first liquid outlet channel that extends axially through the connector, and a liquid outlet hole is formed on the substrate that is opposite to and communicates with the liquid outlet channel. The microneedle array includes solid microneedles and / or hollow microneedles. Alternatively, the liquid outlet channel includes a second liquid outlet channel formed on the adapter. One end of the second liquid outlet channel is connected to the mounting channel and forms a second liquid inlet. When the microneedle kit is installed in the second mounting section or moved forward to the protrusion, the second liquid inlet is offset from the microneedle kit. The other end of the second liquid outlet channel extends to the end face of the adapter with the protrusion and forms a second liquid outlet. The second liquid outlet is connected to the gap of the microneedle array. Alternatively, the liquid outlet channel includes a second liquid outlet channel formed on the adapter and a first liquid outlet channel and a connecting channel formed on the connector. One end of the second liquid outlet channel communicates with the mounting channel and forms a second liquid inlet. When the microneedle kit is installed in the second mounting section or moved forward to the protrusion, the second liquid inlet is offset from the microneedle kit. The other end of the second liquid outlet channel extends to the inner sidewall of the adapter and communicates with the mounting channel to form a second liquid outlet. The first liquid outlet channel is axially arranged, with one end of the first liquid outlet channel near the microneedle piece open and the other end closed. The connecting channel penetrates the connector along the wall thickness, with one end of the connecting channel communicating with the first liquid outlet channel and the other end communicating with the outer sidewall of the connector. When the microneedle kit is installed in the second mounting section or moved forward to the protrusion, the connecting channel and the second liquid outlet are opposite to each other and communicate with each other.

8. The microneedle assembly according to claim 2, characterized in that, The diameter of the protrusion is smaller than the diameter of the first end of the connector and larger than the diameter of the substrate, so that when the microneedle kit is installed in the second mounting section, the end face of the first end of the connector abuts against the inner end face of the end of the adapter with the protrusion.

9. The microneedle assembly according to claim 1, characterized in that, The axial length of the inner wall of the protrusion is greater than or equal to the thickness of the substrate, and the outer peripheral surface of the substrate is in a sealing fit with the inner wall of the protrusion.

10. The microneedle assembly according to claim 1, characterized in that, The inner wall of the installation channel is provided with an internal thread at one end near the installation port, and the internal thread is configured to engage with the connection thread of the beauty tool. Alternatively, one end of the adapter near the mounting port is configured to be inserted into the connection port of the beauty tool and sealed to the connection port; Alternatively, the mounting port may be configured for sealed insertion into the connection port of the beauty tool.

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