Hydrophobic needle

Abstract

The utility model discloses a hydrotherapy needle. The hydrotherapy needle comprises a needle body, a needle seat and a needle cap, a first positioning structure is arranged on the needle seat and is used for identifying the position of the needle seat by a machine; the needle cap is connected with the needle base in a matched mode, a second positioning structure is arranged on the needle cap and used for recognizing the position of the needle cap relative to the first positioning structure and the orientation of the needle cap through a machine, and the needle body is suitable for being fixed through the needle base and / or the needle cap. When an automatic machine is used for positioning and assembling the needle base and the needle cap, the first positioning structure and the second positioning structure can serve as recognition feature points of the needle base and the needle cap respectively, and then the positioning precision and the assembling precision of the machine for the needle base and the needle cap are improved. According to the technical scheme, the problems that an existing hydro-optical needle is low in assembling precision and assembling efficiency are solved, and assembling convenience of the hydro-optical needle is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical aesthetic device technology, and in particular to a water-light injection. Background Technology

[0002] Hyaluronic acid injections, a medical aesthetic device used for skin whitening, are becoming increasingly widely used. Hyaluronic acid injections typically consist of multiple needles. Treatment solution is injected through inlets into the solution channels within these needles, ultimately delivering the cosmetic effect to the recipient.

[0003] Hyaluronic acid injections generally consist of multiple components, including the needle hub, needle cap, and needle body. The depth to which the treatment solution is injected affects the treatment effect, thus requiring high assembly precision. Current hyaluronic acid injections are assembled by sequentially assembling the needle hub, needle cap, and needle body. The installation precision of the needle cap and needle hub affects the insertion precision of the needle body, making it difficult to control the overall assembly precision of the hyaluronic acid injection during assembly, resulting in low assembly efficiency. Utility Model Content

[0004] The main purpose of this invention is to provide a water-light injection that addresses the problems of low assembly accuracy and low assembly efficiency in existing water-light injections.

[0005] To achieve the above objectives, the present invention proposes a water-light needle comprising a needle body, a needle base, and a needle cap; the needle base is provided with a first positioning structure, which is used by the machine to identify the position of the needle base; the needle cap is connected to the needle base, and the needle cap is provided with a second positioning structure, which is used by the machine to identify the position of the needle cap relative to the first positioning structure and the orientation of the needle cap; the needle body is adapted to be fixed by the needle base and / or the needle cap.

[0006] In one embodiment of this utility model, the first positioning structure is a positioning post, which protrudes from the side of the needle seat facing the needle cap. The needle cap has a positioning hole, and the positioning post passes through the positioning hole. Both the positioning post and the positioning hole are offset from the center of the needle seat and the needle cap.

[0007] In one embodiment of this utility model, the cross-sectional shape of both the positioning post and the positioning hole is semi-circular.

[0008] In one embodiment of this utility model, the second positioning structure is a limiting block. The needle seat is recessed on the side facing the needle cap to form an installation groove. The limiting block protrudes on the side of the needle cap facing the needle seat. A limiting groove is formed on the needle seat. The needle cap is embedded in the installation groove. The limiting block is limited within the limiting groove.

[0009] In one embodiment of the present invention, the groove wall of the mounting groove is provided with a plurality of recesses at intervals along its circumference, and the outer side wall of the needle cap is provided with a plurality of protrusions at intervals along its circumference. The recesses and the protrusions are both extended along the groove depth direction of the mounting groove, and each of the protrusions is adapted to a recess.

[0010] In one embodiment of the present invention, the needle seat and the needle cap are arranged to form a plurality of needle grooves, and the needle body is provided with a plurality of needles, each needle body being inserted into one of the needle grooves.

[0011] In one embodiment of this utility model, the end of the needle cap facing away from the needle seat is recessed with a gripping groove, and a clamping part is protruding in the gripping groove. The gripping groove is used for a robotic arm to extend into, and the robotic arm clamps the clamping part to connect the needle cap with the needle seat.

[0012] In one embodiment of this utility model, the water light needle further includes a housing, a sliding cavity is formed inside the housing, the needle seat is slidably disposed in the sliding cavity, and a plurality of guide portions are provided on the housing, the guide portions being located at the end of the housing away from the sliding cavity, the guide portions being used for guiding the needle body when it moves.

[0013] In one embodiment of this utility model, the cross-sectional shape of the sliding cavity is rectangular, and the cross-sectional dimension of the needle seat is smaller than that of the sliding cavity and is adapted to the sliding cavity.

[0014] In one embodiment of the present invention, the outer shell is further provided with an opening, the opening being located at one end of the outer shell near the guide portion, and the external glue injection mechanism is adapted to inject glue into the top of the needle cap through the opening.

[0015] The proposed water-light needle of this utility model includes a needle base, a needle cap, and a needle body. The needle base and needle cap are assembled to form a flow channel, and the needle body is then fixedly installed through the needle base and / or needle cap, allowing the needle body to connect to the flow channel and thus enabling the treatment fluid to flow into the needle body through the flow channel. Furthermore, a first positioning structure is provided on the needle base, and a second positioning structure is provided on the needle cap. The first and second positioning structures can be protruding positioning blocks, recessed positioning grooves, or positioning holes. During the machine's positioning and assembly of the needle base and needle cap, the first and second positioning structures can serve as identification feature points for the needle base and needle cap, respectively, thereby improving the machine's positioning and assembly accuracy. Simultaneously, the second positioning structure can also serve as an orientation identification feature for the needle cap, allowing the machine to identify whether the needle cap's orientation relative to the needle base is correct when the needle cap is assembled on the needle base, further improving the assembly accuracy of the water-light needle. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a top view of the water-light needle of this utility model;

[0018] Figure 2 for Figure 1 Cross-sectional view along point AA;

[0019] Figure 3 This is an exploded view of the water-light needle of this utility model;

[0020] Figure 4 for Figure 3 Exploded view of the needle hub and needle cap in a hyaluronic acid injection;

[0021] Figure 5 for Figure 3 A schematic diagram of the needle seat structure in a water-light injection;

[0022] Figure 6 for Figure 3 A structural diagram of the needle cap in a water-light injection from one perspective;

[0023] Figure 7 for Figure 6 The diagram shows the structure of the needle cap from another perspective.

[0024] Explanation of icon numbers:

[0025]

[0026]

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Throughout the text, "and / or" and "and / or" have the same meaning, both indicating the inclusion of three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are simultaneously satisfied. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] This utility model proposes a water-light needle 1.

[0033] Combination Figures 1-4 As shown, in one embodiment of this utility model, it includes a needle body 30, a needle seat 10, and a needle cap 20; the needle seat 10 is provided with a first positioning structure, which is used for machine identification of the position of the needle seat 10; the needle cap 20 is connected to the needle seat 10, and the needle cap 20 is provided with a second positioning structure, which is used for machine identification of the position of the needle cap 20 relative to the first positioning structure and the orientation of the needle cap 20; the needle body 30 is adapted to be fixed by the needle seat 10 and / or the needle cap 20.

[0034] In this embodiment, when the mesotherapy needle 1 treats the patient, one end of the needle body 30 away from the needle base 10 is inserted into the patient, while the other end is positioned at the needle base 10 and / or needle cap 20. The needle base 10 and needle cap 20 together form a flow channel for the flow of treatment fluid. A fluid inlet 12 is provided at the end of the needle base 10 away from the needle cap 20. The fluid inlet 12 has an inlet 121 that connects to the flow channel. Treatment fluid is injected from the fluid inlet 121 of the mesotherapy needle 1, and then sequentially passes through the flow channel and the solution channel 31 inside the needle body 30 before finally being injected into the patient, thus achieving the treatment objective.

[0035] Meanwhile, the water-light needle 1 proposed in this application reduces the complexity of structural mold opening by separately molding the needle base 10 and the needle cap 20 before assembling them. Furthermore, a first positioning structure is provided on the needle base 10, and a second positioning structure is provided on the needle cap 20. The first and second positioning structures can serve as identification feature points for the needle base 10 and the needle cap 20, respectively, thereby improving the positioning accuracy and assembly accuracy of the machine for the needle base 10 and the needle cap 20. The first positioning structure can be a raised positioning block, or a recessed positioning groove or positioning hole 21. Simultaneously, the first and second positioning structures can also serve as features for identifying and judging the orientation of the needle base 10 and the needle cap 20. Therefore, during automated assembly, the machine can determine whether the orientation of the needle base 10 and the needle cap 20 is correct based on the identification and alignment of the first and second positioning structures, thus facilitating orientation adjustment to complete the installation and mating of the needle base 10 and the needle cap 20. Since the needle body 30 is fixed by the needle seat 10 and / or the needle cap 20, by setting the first positioning structure and the second positioning structure, the assembly accuracy of the needle seat 10 and the needle cap 20 is improved, thereby improving the installation accuracy of the needle body 30, so as to improve the automated assembly accuracy and efficiency of the water light needle 1.

[0036] Combination Figures 4-6 As shown, in one embodiment of this utility model, the first positioning structure is a positioning post 15. The positioning post 15 protrudes from the side of the needle seat 10 facing the needle cap 20. The needle cap 20 has a positioning hole 21. The positioning post 15 passes through the positioning hole 21. Both the positioning post 15 and the positioning hole 21 are offset from the center of the needle seat 10 and the needle cap 20.

[0037] In this embodiment, the first positioning structure is a positioning post 15, and the second positioning structure is a positioning hole 21. The positioning post 15 protrudes from the side of the needle holder 10 facing the needle cap 20, and the positioning hole 21 is provided in the needle cap 20. The positioning post 15 and the positioning hole 21 can serve as visual recognition feature points for automated machines, thereby facilitating the machine's positioning of the needle holder 10 and the needle cap 20 and improving assembly accuracy. By cooperating with the positioning post 15 and the positioning hole 21, the assembly and positioning of the needle holder 10 and the needle cap 20 can be completed, greatly improving the assembly efficiency of the needle holder 10 and the needle cap 20.

[0038] Furthermore, by setting the positioning pin 15 and positioning hole 21 at a position off-center from the needle seat 10 and needle cap 20, when the needle cap 20 is installed in the mounting groove 11, if the angle of the needle cap 20 relative to the needle seat 10 is incorrect or the needle cap 20 is installed backwards, the positioning pin 15 cannot be aligned with the positioning hole 21 for assembly. This achieves the effect of preventing mistaken assembly of the needle cap 20 and needle seat 10, improving the assembly accuracy of the needle seat 10 and needle cap 20, and thus also improving the installation accuracy and efficiency of the needle body 30.

[0039] Combination Figure 5 and Figure 6 As shown, in one embodiment of this utility model, the cross-sectional shape of both the positioning post 15 and the positioning hole 21 is semi-circular.

[0040] In this embodiment, the cross-sectional shapes of both the positioning post 15 and the positioning hole 21 are designed as semi-circular. Simultaneously, the size of the positioning hole 21 is slightly larger than the size of the positioning post 15. When the positioning post 15 is inserted into the positioning hole 21, the semi-circular design of both the positioning post 15 and the positioning hole 21 can restrict their rotation in the circumferential direction, thus also preventing incorrect assembly of the needle seat 10 and the needle cap 20. It is understood that the cross-sectional shapes of both can also be designed as rectangular, rhomboid, or other angular shapes, achieving the same technical effect. Therefore, in other embodiments, when the cross-sectional shapes of the positioning post 15 and the positioning hole 21 are semi-circular, rectangular, or rhomboid, they can also be designed at the center of the needle seat 10 and the needle cap 20.

[0041] Please continue to refer to this. Figure 5 and Figure 6 In one embodiment of this utility model, the second positioning structure is a limiting block 24. The needle seat 10 is recessed on the side facing the needle cap 20 to form an installation groove 11. The limiting block 24 protrudes on the side of the needle cap 20 facing the needle seat 10. A limiting groove 13 is provided on the needle seat 10. The needle cap 20 is embedded in the installation groove 11, and the limiting block 24 is limited in the limiting groove 13.

[0042] In this embodiment, the limiting block 24 is disposed within the limiting groove 13. The shape of the limiting block 24 is the same as that of the limiting groove 13, and their dimensions are compatible. When the needle cap 20 is embedded in the mounting groove 11, the limiting groove 13 acts as a limiting block for the limiting block 24, thereby restricting the relative rotation and radial movement of the needle cap 20 and the needle holder 10. Simultaneously, during the assembly of the needle cap 20 and the needle holder 10, whether the limiting block 24 is embedded within the limiting groove 13 can serve as a criterion for determining whether the assembly direction of the needle cap 20 and the needle holder 10 is correct and whether the assembly is in place. This facilitates confirmation of the assembly status of the needle holder 10 and the needle cap 20, improving the assembly accuracy of the needle holder 10 and the needle cap 20.

[0043] Please continue to refer to this. Figure 5 and Figure 6 In one embodiment of the present invention, the groove wall of the mounting groove 11 is provided with a plurality of recesses 16 at intervals along its circumference, and the outer side wall of the needle cap 20 is provided with a plurality of protrusions 22 at intervals along its circumference. The recesses 16 and the protrusions 22 are both extended along the groove depth direction of the mounting groove 11, and each protrusion 22 is adapted to a recess 16.

[0044] In this embodiment, during the automated assembly of the needle holder 10 and the needle cap 20, it is necessary to identify and locate the product position. By providing a recess 16 on the wall of the mounting groove 11 and a protrusion 22 on the side wall of the needle cap 20, the protrusion 22 and the recess 16 make the features of the needle holder 10 and the needle cap 20 more obvious. Therefore, the protrusion 22 and the recess 16 can also be used as identification feature points for the needle cap 20 and the needle holder 10, making the needle cap 20 and the needle holder 10 easier to identify and improving the assembly accuracy of the needle cap 20 and the needle holder 10. The cross-sectional shape of the recess 16 formed on the wall of the mounting groove 11 can be rectangular, rhomboid, or other shapes. The protrusion 22 formed on the outer side wall of the needle cap 20 is adapted to the recess 16 and can be rectangular, rhomboid, or other shapes. Meanwhile, after the needle cap 20 is inserted into the mounting groove 11, the cooperation between the protrusion 22 and the recess 16 can restrict the rotation of the needle cap 20 in its circumferential direction, thereby improving the stability of the cooperation between the needle seat 10 and the needle cap 20.

[0045] Combination Figures 3-6 As shown, in one embodiment of the present invention, the needle seat 10 and the needle cap 20 surround to form a plurality of needle grooves 14, and a plurality of needle bodies 30 are provided, with each needle body 30 inserted into a needle groove 14.

[0046] In this embodiment, the needle groove 14 is formed by the enclosure of the needle cap 20 and the groove wall of the mounting groove 11. Therefore, during the assembly process of the needle cap 20 and the needle seat 10, it is necessary to ensure that the relative positions of the needle cap 20 and the needle seat 10 are the same as designed, thereby ensuring the installation accuracy of the needle body 30. Multiple clearance grooves 141 can be recessed at intervals on both the outer wall of the needle cap 20 and the inner wall of the needle seat 10. When the needle cap 20 is inserted into the mounting groove 11 of the needle seat 10, the clearance grooves 141 on the needle cap 20 and the clearance grooves 141 on the needle seat 10 enclose each other to form the needle groove 14. Multiple needle bodies 30 are respectively inserted into the needle groove 14 formed by the needle cap 20 and the needle seat 10. The needle seat 10 and the needle cap 20 adopt a separate structure. The assembly of the needle cap 20 and the needle seat 10 is achieved by embedding the needle cap 20 into the mounting groove 11. This structure, compared to the integrated structure of the needle cap 20 and the needle seat 10, has the advantage of convenient processing and forming. In other embodiments, clearance grooves 141 may be provided only on the sidewalls of the needle holder 10 or the needle cap 20, thereby reducing the impact of assembly errors of the needle holder 10 and the needle cap 20 on the size and positional accuracy of the needle groove 14, and thus improving the accuracy of the needle body 30 installation.

[0047] Combination Figure 3 and Figure 4 As shown, in one embodiment of the present invention, the inner wall of the needle groove 14 opening is chamfered so that the shape of the needle groove 14 opening is conical.

[0048] In this embodiment, to ensure smooth insertion of the needle body 30 into the needle groove 14, the inner diameter of the needle groove 14 needs to be designed to be slightly larger than the diameter of the needle body 30. Therefore, by setting a chamfer around the inner wall of the opening of the needle groove 14, the inner wall of the end of the chamfered needle groove 14 becomes conical, making the opening size larger than the inner diameter of the needle groove 14, thereby improving the ease of needle body 30 installation. Simultaneously, due to the improved ease of needle body 30 installation, the diameter of the needle groove 14 can be designed to be smaller, thereby increasing the stability of the needle body 30 within the needle groove 14. Furthermore, the groove wall of the needle groove 14 smoothly transitions to the chamfer, making the insertion of the needle body 30 into the needle groove 14 even smoother.

[0049] Combination Figure 7 As shown, in one embodiment of this utility model, the end of the needle cap 20 facing away from the needle seat 10 is recessed with a gripping groove 25, and a clamping part 23 is protruding inside the gripping groove 25. The gripping groove 25 is used for the robotic arm to extend into, and the robotic arm clamps the clamping part 23 to connect the needle cap 20 with the needle seat 10.

[0050] In this embodiment, the gripping groove 25 is arranged around the circumference of the needle cap 20. As can be seen from the above embodiment, the needle cap 20 has protruding parts 22 around its periphery. When the gripping groove 25 is opened, it can be slotted at the opposite position of the gripping groove 25 and the protruding parts 22 according to the shape of the needle cap 20, thereby increasing the volume of the gripping groove 25 and facilitating the insertion of the robotic arm into the gripping groove 25. The clamping part 23 can be set at the middle position of the gripping groove 25 so that the robotic arm can maintain the balance of the needle cap 20 when gripping it. At the same time, the positioning hole 21 can be opened at the center of the clamping part 23, thereby increasing the effective depth of the positioning hole 21 and improving the fit strength and stability of the positioning post 15 and the positioning hole 21. The clamping part 23 and the pick-and-place groove designed in this application facilitate the pick-and-place of the needle cap 20 and improve the assembly efficiency of the water light needle 1.

[0051] Combination Figures 1-3 As shown, in one embodiment of the present invention, the water light needle 1 further includes a housing 40, a sliding cavity 43 is formed inside the housing 40, the needle seat 10 is slidably disposed in the sliding cavity 43, and a plurality of guide portions 41 are provided on the housing 40. The guide portions 41 are located at the end of the housing 40 away from the sliding cavity 43, and the guide portions 41 are used to guide the needle body 30 when it moves.

[0052] In this embodiment, the outer shell 40 protects the needle holder 10 and the needle body 30. The needle holder 10 is slidably disposed within the sliding cavity 43, allowing it to move along the cavity and extend or retract into it, thus enabling the needle body 30 to be inserted into the treatment subject for cosmetic treatment. The guide portion 41 is cylindrical and disposed on the outer shell 40. It has a guide hole 411, which is identical in shape to the needle body 30. The diameter of the guide hole 411 is designed to gradually decrease from the needle holder 10 to the outer shell 40, guiding and limiting the movement of the needle body 30. This improves the ease of inserting the needle body 30 into the guide portion 41 and, consequently, the ease of assembling the outer shell 40.

[0053] Combination Figure 2 As shown, in one embodiment of the present invention, the cross-sectional shape of the sliding cavity 43 is rectangular, and the cross-sectional dimension of the needle seat 10 is smaller than that of the sliding cavity 43 and is adapted to the sliding cavity 43.

[0054] In this embodiment, the outermost shape of the needle holder 10 is rectangular. Therefore, the shape of the sliding cavity 43 is also designed with a rectangular cross-section to better adapt the sliding cavity 43 to the needle holder 10. Simultaneously, when the needle holder 10 slides within the sliding cavity 43 or when the outer shell 40 is assembled with the needle holder 10, the sliding cavity 43 can circumferentially limit the needle holder 10, preventing rotation within the sliding cavity 43 and improving the assembly efficiency of the guide hole 411 and the needle body 30. A negative pressure interface 42 communicating with the sliding cavity 43 is also provided on the periphery of the outer shell 40. During treatment with the water-light needle 1, the treatment object is suctioned through the negative pressure interface 42 to ensure that the depth to which the needle body 30 is inserted into the treatment object is as consistent as possible, thereby improving the treatment effect of the water-light needle 1.

[0055] Combination Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the water light needle 1 further includes an adjusting member 50. The adjusting member 50 is located at the end of the needle seat 10 away from the needle cap 20 and is threadedly connected to the outer shell 40. By rotating the adjusting member 50, the adjusting member 50 drives the needle seat 10 to move along the axial direction of the outer shell 40, so that the needle body 30 extends out or retracts into the guide hole 411.

[0056] In this embodiment, the adjusting member 50 and the outer shell 40 are connected by threads. The needle body 30 can be extended or retracted by rotating the adjusting member 50, which facilitates the operation of medical personnel. At the same time, the threaded connection makes assembly and disassembly more convenient, and can be assembled and processed manually or automatically, thus improving assembly efficiency.

[0057] Combination Figure 1As shown, in one embodiment of the present invention, the outer shell 40 is also provided with an opening 44, which is located at one end of the outer shell 40 near the guide portion 41. The external glue injection mechanism is adapted to inject glue into the top of the needle cap 20 through the opening 44.

[0058] In this embodiment, after the outer shell 40 is assembled with the needle holder 10, needle cap 20, and needle body 30, the needle holder 10, needle cap 20, and needle body 30 are all disposed within the sliding cavity 43. By opening an opening 44 at one end of the outer shell 40 near the guide portion 41 to communicate with the sliding cavity 43, and injecting adhesive into the sliding cavity 43 through the opening 44, the adhesive fixes and seals the needle holder 10, needle cap 20, and needle body 30, thereby improving the stability of the assembly of the water-light needle 1. It is understood that multiple openings 44 arranged at intervals can be opened on the outer shell 40, and by injecting adhesive into different openings 44, the uniformity of adhesive injection is improved.

[0059] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A type of hyaluronic acid injection, characterized in that, include: Needle body; A needle holder, wherein a first positioning structure is provided on the needle holder, and the first positioning structure is used for machine identification of the position of the needle holder; as well as A needle cap is provided, which is connected to the needle base. The needle cap is provided with a second positioning structure. The second positioning structure is used by the machine to identify the position of the needle cap relative to the first positioning structure and the orientation of the needle cap. The needle body is adapted to be fixed by the needle base and / or the needle cap.

2. The water-light injection as described in claim 1, characterized in that, The first positioning structure is a positioning post, which protrudes from the side of the needle seat facing the needle cap. The needle cap has a positioning hole, and the positioning post passes through the positioning hole. Both the positioning post and the positioning hole are offset from the center of the needle seat and the needle cap.

3. The water-light injection as described in claim 2, characterized in that, Both the positioning post and the positioning hole have a semi-circular cross-sectional shape.

4. The hyaluronic acid injection as described in any one of claims 1-3, characterized in that, The second positioning structure is a limiting block. The needle seat has a recessed mounting groove on the side facing the needle cap. The limiting block protrudes from the side facing the needle seat. A limiting groove is opened on the needle seat. The needle cap is embedded in the mounting groove. The limiting block is limited within the limiting groove.

5. The water-light injection as described in claim 4, characterized in that, The mounting groove has a plurality of recesses spaced apart along its circumference, and the outer side wall of the needle cap has a plurality of protrusions spaced apart along its circumference. Both the recesses and the protrusions extend along the groove depth of the mounting groove, and each protrusion is adapted to a recess.

6. The hyaluronic acid injection as described in any one of claims 1-3, characterized in that, The needle seat and the needle cap form multiple needle grooves, and the needle body is provided with multiple needles, each needle body being inserted into one of the needle grooves.

7. The hyaluronic acid injection as described in any one of claims 1-3, characterized in that, The needle cap has a recessed gripping groove at one end facing away from the needle base, and a clamping part protrudes from the gripping groove. The gripping groove is used for a robotic arm to extend into, and the robotic arm clamps the clamping part to connect the needle cap with the needle base.

8. The hyaluronic acid injection as described in any one of claims 1-3, characterized in that, The water-light needle also includes a housing, inside which a sliding cavity is formed. The needle seat is slidably disposed in the sliding cavity. The housing is provided with a plurality of guide parts, which are located at the end of the housing away from the sliding cavity. The guide parts are used to guide the needle body when it moves.

9. The water-light injection as described in claim 8, characterized in that, The sliding cavity has a rectangular cross-sectional shape, and the cross-sectional dimension of the needle seat is smaller than that of the sliding cavity and is adapted to the sliding cavity.

10. The water-light injection as described in claim 8, characterized in that, The outer shell is also provided with an opening located at one end of the outer shell near the guide portion, and the external glue injection mechanism is adapted to inject glue into the top of the needle cap through the opening.

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