Disposable needleless injection needle

Abstract

The utility model provides a disposable needleless injection needle which comprises a pressure source instrument connecting part, a liquid medicine injection part, a liquid medicine storage part and a liquid medicine injection part, and a screw sequentially penetrates through a screw hole of the liquid medicine injection part and a screw hole of the liquid medicine storage part and finally enters a threaded hole of the pressure source instrument connecting part to achieve overall fixation. The side wall of the liquid medicine injection part and the side wall of the liquid medicine storage part are fixed through screws, the pressure source instrument connecting part is connected with an external micro-jet injector to obtain a pressure source, and the liquid medicine injection part is connected with an external injection tube to obtain liquid medicine. And the continuous broken injection of the liquid medicine is realized. The utility model has the beneficial effects that a trace amount of medicine can be quickly and accurately injected into the skin surface layer, so that pain and recovery time are reduced; under the condition that the needle head is not replaced, liquid medicine can be added at any time, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to the field of medical cosmetology, in particular to a disposable needle-free injection needle. Background Art

[0002] With the rapid development of the beauty industry, people have higher requirements for beauty products and absorption efficiency. In the beauty medical industry, in order to provide customers with a better overall experience, the simple application form can no longer meet the market demand. A beauty instrument that can not only improve absorption efficiency but also reduce pain and shorten recovery time has come into being. The disposable needle-free injection needle used with it is an indispensable product to achieve a good experience.

[0003] Human skin is composed of the epidermis, dermis, and subcutaneous tissue. In order for the solution to be quickly absorbed by the skin, the most commonly used method on the market is beauty needles. The solution enters the dermis of the skin through manual injection, which is very painful and requires professional personnel to operate.

[0004] The needle-free syringes currently on the beauty market, such as needle-free laser-induced microjet syringes or needle-free magnetic microjet syringes, have all achieved needle-free injections. However, the needle, syringe, and pressure source of the needle-free syringe cannot be separated, resulting in the syringe having a service life of only once, which wastes resources.

[0005] For example: In the prior art, although the utility model patent with authorization announcement number CN 219398527 U discloses a medical needle-free syringe that "threadedly connects the injection tube with the internal threaded joint through an external threaded joint, and then starts the control valve to discharge the high-pressure gas inside the high-pressure gas cylinder through the direct injection valve, and then the high-pressure gas pushes the push plate to drive the piston to slide inside the injection tube, and then the piston sprays the liquid medicine through the injection head. The high-pressure jet can penetrate the human skin for injection, thereby enabling effective needle-free injection." However, the pressure source high-pressure gas cylinder, the injection head and the injection tube are integrally connected, and the liquid medicine needs to be injected into the injection tube first. The amount of liquid medicine cannot be controlled at any time, which will lead to excessive waste of liquid medicine, or too little liquid medicine requires replacing the injection tube and needle. In addition, during the injection process, the airflow in the high-pressure gas is continuously discharged, causing the liquid medicine to be continuously sprayed out, and it is impossible to achieve continuous and uniform distribution of the liquid medicine.

[0006] Therefore, there is an urgent need for a disposable needle-free injection needle that can add liquid medicine at any time without changing the needle and can achieve continuous intermittent injection so that the liquid medicine injection can be evenly distributed. Utility Model Content

[0007] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a disposable needle-free injection needle.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] A disposable needle-free injection needle comprises a pressure source instrument connection part, a liquid medicine injection part, a liquid medicine storage part and a liquid medicine ejection part, wherein screws pass through the screw holes of the liquid medicine ejection part and the screw holes of the liquid medicine storage part in sequence, and finally enter the threaded holes of the pressure source instrument connection part to achieve overall fixation; the liquid medicine injection part and the side wall of the liquid medicine storage part are fixed by screws, the pressure source instrument connection part is connected to an external microjet syringe to obtain a pressure source, and the liquid medicine injection part is connected to an external injection tube to obtain liquid medicine. Under the action of a strong airflow from the pressure source, the liquid medicine automatically flows into the liquid medicine storage part through the liquid medicine injection part and is converted into a gaseous state. The liquid medicine in the gaseous state in the liquid medicine storage part enters the liquid medicine ejection part, and by adjusting the connection and closing of the liquid medicine transmission port between the liquid medicine ejection part and the liquid medicine storage part, uninterrupted and discontinuous injection of the liquid medicine is achieved.

[0010] The pressure source instrument connection part is connected to the external microjet syringe to obtain the pressure source. Under the action of the pressure source, the entire injection needle generates vacuum negative pressure. The drug injection part is connected to the injection tube to obtain the drug solution. Under the action of negative pressure, the drug solution automatically flows into the drug solution storage part through the drug solution injection part. The drug solution in the drug solution storage part is converted into a gaseous state under the action of a powerful micro-airflow pressure source, and is then micro-injected into the skin surface through the drug solution injection part.

[0011] The pressure source instrument connection portion includes a base, a connector, a threaded hole, a first slot, and a second slot. The upper plate surface of the base is open, and a first groove is provided inside. The connector is integrally connected to the first groove. The connector is configured as a hollow cylinder. A hollow cylindrical fixing piece is provided at the bottom end of the connector. The cylindrical fixing piece penetrates the first groove and communicates with the liquid medicine storage portion, so that the micro-jet flow released by the external pressure source instrument can act on the liquid medicine storage portion. The diameter of the cylindrical fixing piece is smaller than that of the cylindrical connector. A threaded base is provided in the first groove from the lower plate surface of the base. The threaded base is correspondingly provided with threaded holes. Two protrusions are symmetrically provided on the outer wall of the top of the cylindrical connector. A first slot and a second slot are respectively provided at the first groove corresponding to the protrusions on the outer wall of the cylindrical connector. The first slot and the second slot both penetrate the first groove. The first slot and the second slot are connected to the liquid medicine storage portion. According to the molecular weight and viscosity of the injected liquid, the injection intensity is adjusted by the external microjet injector switch, thereby adjusting the liquid medicine amount and injection depth through the first slot and the second slot. A rubber soft cover slot is provided on the lower plate of the base, and a rubber soft cover is fixed in the rubber soft cover slot. The rubber soft cover is made of soft rubber material, and the middle of the rubber soft cover is set to be convex. Under the action of the pressure source, the middle part of the rubber soft cover can be pushed outward, pushing the liquid in the first liquid storage tank into the second liquid storage tank through the liquid hole, so that the liquid enters the liquid injection part.

[0012] The medicine liquid injection part includes a fixing part, an injection tube joint, a first screw hole base, a second screw hole base, a first screw hole, a second screw hole, a medicine liquid injection hole, a rubber hole plug, and a hole plug base, wherein the first screw hole base and the second screw hole base are provided on one side end of the fixing part, and the side wall of the other side end is integrally connected with the injection tube joint, the first screw hole and the second screw hole base pass through the first screw hole base and the second screw hole base from the side wall of the other side end of the fixing part, the hole plug base is provided between the first screw hole base and the second screw hole base, a medicine liquid injection hole is provided in the middle of the hole plug base, the injection tube joint is provided to be hollow and connected to the medicine liquid injection hole, a rubber hole plug is connected to the hole plug base, and the medicine liquid flows into the rubber hole plug through the medicine liquid injection hole and then enters the medicine liquid storage part.

[0013] The medicine liquid storage part includes a storage body, a screw base, a base screw hole, a medicine liquid inlet hole, a third screw hole, a fourth screw hole, a medicine liquid outflow hole, a first medicine liquid storage bin, and a second medicine liquid storage bin, wherein the upper end face of the storage body is open and the lower end face is closed, the first medicine liquid storage bin is arranged at the center of the upper end face of the storage body to store medicine liquid, the second medicine liquid storage bin is arranged at the center of the lower end face of the storage body to store medicine liquid, the first medicine liquid storage bin and the second medicine liquid storage bin are connected through the medicine liquid outflow hole, a groove is formed between the outer wall of the first medicine liquid storage bin and the inner wall of the storage body, the screw base is arranged in the groove and is integrally formed with the storage body, and the height is consistent with the storage body. A hole is set in the center of the screw base and penetrates the storage body. The number of screw bases is consistent with the number of threaded bases and their positions correspond. An outer end of the storage body is consistent with the shape of the fixing part of the medicine injection part. The outer end is solid with the inner wall of the storage body. The outer end is provided with a medicine inflow hole, a third screw hole and a fourth screw hole. The third screw hole and the fourth screw hole correspond to the positions of the first screw hole and the second screw hole in the medicine injection part respectively. The medicine inflow hole is connected to the inner wall of the first medicine storage bin. The aperture of the medicine inflow hole gradually decreases from the outside of the storage body to the inside of the first medicine storage bin. The medicine inflow hole corresponds to the rubber hole plug of the medicine injection part, and the rubber hole plug can be inserted into the medicine inflow hole.

[0014] The liquid medicine injection part includes a fixing seat, a nozzle, a nozzle connecting seat, a liquid medicine hole, a plastic nail, and a spring, wherein the fixing seat is provided with screw holes that are the same in number and corresponding in position to the screw holes in the base in the liquid medicine storage part, a nozzle connecting seat is provided at the center of the fixing seat, the nozzle connecting seat passes through the fixing seat to the lower end of the fixing seat, the nozzle connecting seat is cone-shaped as a whole, the fixing seat and the nozzle connecting seat are integrally formed, a liquid medicine hole is provided in the center of the nozzle connecting seat, the liquid medicine hole penetrates the entire nozzle connecting seat, a nozzle is fixed at the liquid medicine hole on the nozzle connecting seat at the lower end of the fixing seat, a hole is provided in the center of the nozzle, a spring is placed in the liquid medicine hole on the nozzle connecting seat at the upper end of the fixing seat, a plastic nail is placed on the spring, and the nail cap provided on the plastic nail can enter the second liquid medicine storage bin and block the liquid medicine outflow hole.

[0015] Furthermore, the threaded base surrounds the connector and is partially embedded in the bottom end of the connector, and is provided in four pieces.

[0016] Furthermore, the first liquid medicine storage bin and the second liquid medicine storage bin are funnel-shaped.

[0017] Furthermore, the fixing portion in the liquid medicine spraying portion is in a groove shape.

[0018] Furthermore, the first slot hole and the second slot hole are communicated with the groove in the liquid medicine storage portion.

[0019] Furthermore, a rubber ring slot is provided on the lower end surface of the storage body, and the rubber ring is fixed in the rubber ring slot.

[0020] The utility model has the following beneficial effects: 1. It can quickly and accurately inject a trace amount of medicine into the surface layer of the skin, reducing pain and recovery time; 2. When used in conjunction with a magnetic or laser micro-injection pressure source, it can achieve continuous and intermittent injection so that the injection of the medicine solution can be evenly distributed; 3. The injection tube is separated from the pressure source, and the medicine solution can be added at any time without changing the needle, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 This is a top view schematic diagram of the main structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the bottom structure of the connection part of the pressure source instrument of the utility model;

[0024] Figure 4 This is a schematic diagram of the left side structure of the liquid medicine injection part of the utility model;

[0025] Figure 5 This is a schematic diagram of the front structure of the liquid injection part of the utility model;

[0026] Figure 6 This is a schematic top view of the liquid medicine storage portion of the utility model;

[0027] Figure 7 This is a schematic diagram of the bottom of the liquid medicine storage part of the utility model;

[0028] Figure 8 This is a schematic diagram of the right side of the liquid medicine storage part of the utility model;

[0029] Figure 9 This is a schematic top view of the liquid injection unit of the utility model;

[0030] Figure 10 It is a side view schematic diagram of the liquid injection part of the utility model.

[0031] Legend:

[0032] 1. Pressure source instrument connection; 101. Base; 102. Connector; 103. Threaded hole; 104. First slot; 105. Second slot; 106. First groove; 107. Cylindrical fixing member; 108. Threaded base; 109. Protrusion; 110. Rubber cover slot; 111. Rubber cover; 2. Liquid injection unit; 201. Fixing unit; 202. Injection tube connector; 203. First screw base; 204. Second screw base; 205. First screw hole; 206. Second screw hole; 207. Liquid injection hole; 208. Rubber Plug; 209. Plug base; 3. Liquid medicine storage unit; 301. Storage unit; 302. Screw base; 303. Base screw hole; 304. Liquid medicine inlet hole; 305. Third screw hole; 306. Fourth screw hole; 307. Liquid medicine outlet hole; 308. First liquid medicine storage compartment; 309. Second liquid medicine storage compartment; 310. Groove; 311. Rubber ring slot; 4. Liquid medicine injection unit; 401. Fixing seat; 402. Nozzle; 403. Nozzle connecting seat; 404. Liquid medicine hole; 405. Plastic nail; 406. Spring; 407. Screw hole DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] refer to Figure 1 — Figure 10It can be seen that a disposable needle-free injection needle includes a pressure source instrument connection part, a liquid medicine injection part, a liquid medicine storage part, and a liquid medicine injection part, wherein the pressure source instrument connection part includes a base, a connector, a threaded hole, a first slot, and a second slot, wherein the upper plate surface of the base is open, and a first groove is provided inside, and the first groove is integrally connected to the connector, and the connector is configured as a hollow cylinder, and a hollow cylindrical fixing piece is provided at the bottom end of the connector, and the cylindrical fixing piece penetrates the first groove and is connected thereto, and the diameter of the cylindrical fixing piece is smaller than the cylindrical connector, and four threaded bases are provided from the lower plate surface of the base into the first groove, and the four threaded bases are all around The connector is partially embedded in the bottom end of the connector, and the cylindrical fixing part is integrally connected and fixed to the four threaded bases. A threaded hole is provided from the bottom of the first groove to the threaded base. The top outer wall of the cylindrical connector is symmetrically provided with two protrusions, which serve to fix the injection instrument with a snap. The first slot hole and the second slot hole are respectively provided at the first groove corresponding to the two protrusions on the outer wall of the cylindrical connector. The first slot hole and the second slot hole both penetrate the first groove. The first slot hole and the second slot hole are connected to the medicine storage part. According to the molecular weight and viscosity of the injection medicine, the instrument spray intensity is adjusted by the instrument switch to adjust the amount of medicine and the injection depth.

[0035] A rubber soft cover slot is provided on the lower plate of the base, and a rubber soft cover is fixed in the slot. The rubber soft cover is made of soft rubber material, and the middle of the rubber soft cover is set to be convex. Under the action of the pressure source, the middle part of the rubber soft cover can be pushed outward, pushing the liquid in the first liquid storage tank into the second liquid storage tank through the liquid hole, so that the liquid enters the liquid injection part.

[0036] The medicine injection part includes a fixing part, an injection tube joint, a first screw hole base, a second screw hole base, a first screw hole, a second screw hole, a medicine injection hole, a rubber hole plug, and a hole plug base, wherein the fixing part is in a groove shape, and the first screw hole base and the second screw hole base are provided at one side end of the fixing part, and the side wall of the other side end is integrally connected with the injection tube joint, the first screw hole and the second screw hole base are penetrated from the side wall of the fixing part by the first screw hole base and the second screw hole base, the hole plug base is provided between the first screw hole base and the second screw hole base, and the medicine injection hole is provided in the middle of the hole plug base, the injection tube joint is provided to be hollow and connected to the medicine injection hole, and a rubber hole plug is connected to the hole plug base, and the medicine flows into the rubber hole plug through the medicine injection hole and then enters the medicine storage part.

[0037] The liquid medicine storage portion includes a storage body, a screw base, a base screw hole, a liquid medicine inflow hole, a liquid medicine outflow hole, a first liquid medicine storage chamber, and a second liquid medicine storage chamber, wherein the upper end face of the storage body is open and the lower end face is closed, the first liquid medicine storage chamber is arranged in the center of the upper end face of the storage body in a funnel shape, and the second liquid medicine storage chamber is arranged in the center of the lower end face of the storage body in a funnel shape, the first liquid medicine storage chamber and the second liquid medicine storage chamber are connected through the liquid medicine outflow hole, a groove is formed between the outer wall of the first liquid medicine storage chamber and the inner wall of the storage body, four screw bases are arranged in the groove and are integrally formed with the storage body, the four screw bases respectively correspond to the positions of the four threaded bases in the pressure source instrument connection part, and the height is consistent with the storage body , four base screw holes are respectively arranged at the center of the four screw bases to penetrate the storage body, an outer end of the storage body is consistent with the shape of the fixing part of the medicine injection part, and the outer end is solid with the inner wall of the storage body, and a medicine inflow hole, a third screw hole and a fourth screw hole are provided on the outer end. The third screw hole and the fourth screw hole correspond to the positions of the first screw hole and the second screw hole in the medicine injection part respectively. The medicine inflow hole is connected with the inner wall of the first medicine liquid storage bin, and the aperture of the medicine inflow hole gradually decreases from the outside of the storage body to the inside of the first medicine liquid storage bin. The medicine inflow hole corresponds to the rubber hole plug of the medicine injection part, and the rubber hole plug can be inserted into the medicine inflow hole. A rubber ring groove is provided on the lower end surface of the storage body, and the rubber ring is fixed in the groove.

[0038] The liquid medicine injection part includes a fixing seat, a screw hole, a nozzle, a nozzle connecting seat, a liquid medicine hole, a plastic nail, and a spring, wherein four screw holes are provided on the fixing seat, and the four screw holes correspond to the positions of the four base screw holes in the liquid medicine storage part respectively. A nozzle connecting seat is provided at the center of the fixing seat, and the nozzle connecting seat passes through the fixing seat to the lower end of the fixing seat. The nozzle connecting seat is conical as a whole, and the fixing seat and the nozzle connecting seat are integrally formed. A liquid medicine hole is provided in the center of the nozzle connecting seat, and the liquid medicine hole penetrates the entire nozzle connecting seat. A nozzle is fixed at the liquid medicine hole on the nozzle connecting seat at the lower end of the fixing seat, and a hole is provided in the center of the nozzle. A spring is placed in the liquid medicine hole on the nozzle connecting seat at the upper end of the fixing seat, and a plastic nail is placed on the spring. The nail cap provided on the plastic nail can enter the second liquid medicine storage bin and block the liquid medicine outflow hole.

[0039] During the continuous use of the pressure source for injection, the magnetic or laser microinjector generates a strong micro-jet airflow. Under the action of the airflow pressure, the liquid medicine solution turns into a gaseous state. The strong airflow compresses the spring and drives the plastic nail to move toward the nozzle, so that the gaseous liquid medicine smoothly enters the liquid hole from the liquid outflow hole of the liquid storage part, and is then injected into the skin surface through the nozzle. During the pause, the spring rebounds and drives the plastic nail toward the second liquid storage compartment of the liquid storage part, blocking the liquid outflow hole and preventing the gaseous liquid medicine from entering the liquid outflow hole of the liquid storage part. Then the nozzle stops injecting the liquid medicine, and this process is repeated, thereby achieving continuous intermittent injection under the continuous use of the pressure source for injection.

[0040] Working principle: The pressure source instrument connection part of the present invention is connected to a magnetic or laser micro-injector. The magnetic or laser micro-injector generates a strong micro-injection airflow to obtain a pressure source. The injection tube filled with liquid medicine is connected to the liquid medicine injection part. Under the action of the strong pressure source, a vacuum negative pressure is generated in the needle-free injection needle. The liquid medicine in the injection tube automatically enters the first liquid medicine storage chamber of the liquid medicine storage part and is converted into a gaseous state. Under the action of the strong airflow, the spring compression of the liquid medicine injection part drives the plastic nail to move toward the nozzle, so that the gaseous solution is injected into the skin surface layer of 0.4-1.0 mm through the hole on the nozzle, thereby realizing the rapid and accurate injection of a trace amount of liquid medicine into the skin surface layer, reducing pain and recovery time; when the pressure source pauses, the spring rebounds and drives the plastic nail to move toward the second liquid medicine storage chamber, blocking the liquid medicine outflow hole and blocking the airflow at the same time, and repeating this process to achieve continuous and intermittent injection; when the amount of liquid medicine in the injection tube needs to be increased, the injection tube can be directly replaced without replacing the needle and the pressure source, which is convenient and quick.

[0041] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A disposable needle-free injection needle, characterized by: The invention comprises a pressure source instrument connection part (1), a liquid medicine injection part (2), a liquid medicine storage part (3), and a liquid medicine ejection part (4), wherein screws pass through the screw holes of the liquid medicine ejection part (4) and the liquid medicine storage part (3) in sequence and finally enter the threaded hole of the pressure source instrument connection part (1) to realize overall fixation; the liquid medicine injection part (2) and the side wall of the liquid medicine storage part (3) are fixed by screws, the pressure source instrument connection part (1) is connected to an external micro jet syringe to obtain a pressure source, and the liquid medicine injection part (2) is connected to an external injection tube to obtain liquid medicine; under the action of a strong airflow from the pressure source, the liquid medicine automatically flows into the liquid medicine storage part (3) through the liquid medicine injection part (2) and is converted into a gas state; the liquid medicine in the gas state in the liquid medicine storage part (3) enters the liquid medicine ejection part (4), and by adjusting the connection and closing of the liquid medicine transmission port between the liquid medicine ejection part (4) and the liquid medicine storage part (3), uninterrupted and discontinuous injection of the liquid medicine is realized.

2. A disposable needle-free injection needle according to claim 1, characterized in that: The pressure source instrument connection part (1) comprises a base (101), a connector (102), a threaded hole (103), a first slot (104), and a second slot (105), wherein the upper plate surface of the base (101) is open and is provided with a first groove (106) inside. The connector (102) is integrally connected to the first groove (106). The connector (102) is provided in a hollow cylindrical shape. A hollow cylindrical fixing piece (107) is provided at the bottom end of the connector (102). The cylindrical fixing piece (107) penetrates the first groove (106) and is connected to the liquid medicine storage part (3), so that the micro jet airflow released by the external pressure source instrument can act on the liquid medicine storage part (3). The diameter of the cylindrical fixing piece (107) is smaller than that of the cylindrical connector (102). A cylindrical fixing piece (107) is provided from the lower plate surface of the base (101) to the first groove (106). A threaded base (108) is provided, and threaded holes (103) are correspondingly provided on the threaded base (108). Two protrusions (109) are symmetrically provided on the outer wall of the top of the cylindrical connector (102). A first slotted hole (104) and a second slotted hole (105) are respectively provided at the first groove (106) corresponding to the protrusion (109) on the outer wall of the cylindrical connector (102). The first slotted hole (104) and the second slotted hole (105) both penetrate the first groove (106). The first slotted hole (104) and the second slotted hole (105) are connected to the liquid medicine storage part (3). A rubber soft cover slot (110) is provided on the lower plate surface of the base (101). A rubber soft cover (111) is fixed in the rubber soft cover slot (110). The rubber soft cover (111) is made of soft rubber material, and the middle of the rubber soft cover (111) is provided in a convex shape.

3. The disposable needle-free injection needle according to claim 2, characterized in that: The liquid medicine injection part (2) comprises a fixing part (201), an injection tube joint (202), a first screw hole base (203), a second screw hole base (204), a first screw hole (205), a second screw hole (206), a liquid medicine injection hole (207), a rubber hole plug (208), and a hole plug base (209), wherein the first screw hole base (203) and the second screw hole base (204) are provided at one end of the fixing part (201), and the injection tube joint (202) is integrally connected to the side wall of the other end, and the first screw hole (205) and the second screw hole (206) are connected from the fixing part to the injection tube joint (202). The side wall of the other side end of the portion (201) penetrates the first screw hole base (203) and the second screw hole base (204), the hole plug base (209) is arranged between the first screw hole base (203) and the second screw hole base (204), a liquid medicine injection hole (207) is arranged in the middle of the hole plug base (209), the injection tube connector (202) is arranged to be hollow and communicated with the liquid medicine injection hole (207), a rubber hole plug (208) is connected to the hole plug base (209), and the liquid medicine flows into the rubber hole plug (208) through the liquid medicine injection hole (207) and then enters the liquid medicine storage portion (3).

4. The disposable needle-free injection needle according to claim 3, characterized in that: The liquid medicine storage portion (3) comprises a storage body (301), a screw base (302), a base screw hole (303), a liquid medicine inflow hole (304), a liquid medicine outflow hole (307), a first liquid medicine storage chamber (308), and a second liquid medicine storage chamber (309), wherein the upper end surface of the storage body (301) is open and the lower end surface is closed, the first liquid medicine storage chamber (308) is arranged at the center of the upper end surface of the storage body (301) and can store liquid medicine, and the second liquid medicine storage chamber (309) is arranged The medicine liquid can be stored in the center of the lower end surface of the storage body (301). The first medicine liquid storage chamber (308) and the second medicine liquid storage chamber (309) are connected through the medicine liquid outflow hole (307). A groove (310) is formed between the outer wall of the first medicine liquid storage chamber (308) and the inner wall of the storage body (301). The screw base (302) is set in the groove (310) and is integrally formed with the storage body (301). The height is consistent with the storage body (301). The base screw hole (303) is set on the screw base. The center of the screw base (302) penetrates the storage body (301), the number of the screw base (302) is consistent with the number of the threaded base (108) and the position corresponds, an outer end of the storage body (301) matches the shape of the fixing part (201) of the liquid injection part (2), and the outer end is set to be solid with the inner wall of the storage body, and the outer end is provided with a liquid inlet hole (304), a third screw hole (305) and a fourth screw hole (306), the third screw hole (305) and the fourth screw hole (306) The positions of the first screw hole (205) and the second screw hole (206) in the liquid medicine injection part (2) correspond respectively. The liquid medicine inflow hole (304) is connected to the inner wall of the first liquid medicine storage chamber (308). The aperture of the liquid medicine inflow hole (304) gradually decreases from the outside of the storage body (301) to the inside of the first liquid medicine storage chamber (308). The liquid medicine inflow hole (304) corresponds to the rubber hole plug (208) of the liquid medicine injection part (2). The rubber hole plug (208) can be inserted into the liquid medicine inflow hole (304).

5. The disposable needle-free injection needle according to claim 4, characterized in that: The liquid medicine injection portion (4) comprises a fixing seat (401), a nozzle (402), a nozzle connecting seat (403), a liquid medicine hole (404), a plastic nail (405), a spring (406), and a screw hole (407), wherein the fixing seat (401) is provided with screw holes (407) of the same number and corresponding position as the screw holes (303) in the base of the liquid medicine storage portion (3), a nozzle connecting seat (403) is provided at the center of the fixing seat (401), the nozzle connecting seat (403) passes through the fixing seat (401) to the lower end of the fixing seat (401), the nozzle connecting seat (403) is in a cone shape as a whole, and the fixing seat (401) and the nozzle connecting seat (403) are integrated. Molding, a liquid medicine hole (404) is provided at the center of the nozzle connecting seat (403), the liquid medicine hole (404) penetrates the entire nozzle connecting seat (403), a nozzle (402) is fixed at the liquid medicine hole (404) on the nozzle connecting seat (403) at the lower end of the fixed seat (401) (401), a hole is provided at the center of the nozzle (402), a spring (406) is placed in the nozzle connecting seat (403) on the nozzle connecting seat (403) at the upper end of the fixed seat (401), a plastic nail (405) is placed on the spring (406), and a nail cap provided on the plastic nail (405) can enter the second liquid medicine storage chamber (309) and block the liquid medicine outflow hole (307).

6. The disposable needle-free injection needle according to claim 5, characterized in that: The threaded base (108) surrounds the connector (102) and is partially embedded in the bottom end of the connector (102), and is provided in four pieces.

7. The disposable needle-free injection needle according to claim 6, characterized in that: The first liquid medicine storage chamber (308) and the second liquid medicine storage chamber (309) are funnel-shaped.

8. The disposable needle-free injection needle according to claim 7, characterized in that: The fixing portion (201) in the liquid medicine spraying portion (4) is in the shape of a groove.

9. The disposable needle-free injection needle according to claim 8, characterized in that: The first slot hole (104) and the second slot hole (105) are in communication with the groove (310) in the drug solution storage portion (3).

10. The disposable needle-free injection needle according to claim 9, characterized in that: The lower end surface of the storage body (301) is provided with a rubber ring slot (311), and the rubber ring is fixed in the rubber ring slot (311).

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