An ultra-high-speed jet needle-free syringe

Abstract

The present invention relates to an ultra-high-speed jet needle-free syringe, comprising a shell, an electric explosion unit placed in a liquid medium of the shell, the electric explosion unit comprising a high-voltage positive electrode and a high-voltage negative electrode arranged in parallel, and a metal wire array in the shape of a rotating body connected between the two, a medicine tube is arranged in the metal wire array, one end of the medicine tube spraying medicine liquid extends out of the shell, and when a high-voltage pulse power supply supplies power to the electric explosion unit, the metal wire array undergoes electric explosion, and the shock wave squeezes the medicine liquid in the medicine tube to spray out at a high speed. The ultra-high-speed jet needle-free syringe of the present invention has a high medicine liquid spraying speed, penetrates deeper into human tissue, and has a wider range of use; and the wound left by the syringe on the skin is smaller and easier to heal; because the new driving structure is simpler and the consumables cost is lower, it is very advantageous for situations where long-term injection of medicine is required.

Description

Technical Field

[0001] The invention belongs to the technical field of needle-free syringes, and in particular relates to an ultra-high-speed jet needle-free syringe. Background Art

[0002] Needle-free injection is a new drug delivery method that accelerates liquid drugs to a certain speed, allowing the drugs to penetrate the outer layer of the skin and be delivered to the subcutaneous, muscle or membrane areas, and then release them in specific tissue layers to exert their efficacy. Needle-free injection has the characteristics of less pain during injection, avoiding the risk of cross infection, avoiding inflammation at the puncture site, and high drug absorption rate after injection. It has been gradually applied to clinical medicine and home health care.

[0003] At present, the principle of needle-free syringe is that the driving module (power source) generates thrust to push the piston (or push rod), and the piston pushes the liquid medicine to spray from the nozzle at a high speed to pierce the human skin, create a small wound on the human skin and inject the liquid medicine into the subcutaneous tissue. Common driving modules include spring-powered, high-pressure pneumatic, electromagnetic, etc. The spring-type needle-free syringe uses the elastic potential energy of the spring to convert into the kinetic energy of the liquid medicine. Sometimes, in order to meet the requirements of the jet speed, a secondary spring or a tertiary spring is used to obtain sufficient elastic potential energy; the high-pressure pneumatic drive is to release high-pressure gas to obtain energy to push the drug out quickly; the newer electromagnetic drive module works by generating electromagnetic force to push the piston to push the liquid medicine. For example, after the current passes through the coil of an electromagnetic drive module, a magnetic field is generated and the iron core is magnetized. The magnetized iron core and the coil generate attraction. Through the action of gravity, the iron core will move toward the direction of the medicine tube, push the push rod and make the push rod and the piston move forward, completing the process of pushing the liquid medicine.

[0004] The penetration effect of high-pressure and high-speed micro-hole jets in instantly penetrating human skin is the key point of needle-free injection drug delivery methods. The penetration effect directly affects the injection effect, and the penetration effect is directly related to the jet parameters, so the jet parameters (jet velocity, penetration force, jet outlet size, dosage) determine the injection effect of the needle-free syringe (wound size, depth, injection efficiency, etc.). Regardless of the above drive module of the needle-free syringe, the driving force generated is limited, and the friction between the piston and the shell further loses the driving force. The current jet speed is mostly 140-160m / s, and the injection depth is generally 6-8mm, which is difficult to further improve. It cannot reach the injection depth required by some drugs, limiting the application of needle-free syringes. Another problem caused by insufficient driving force is that if the spray hole of the medicine tube is further reduced, the liquid medicine cannot be sprayed out. The larger the spray hole, the larger the wound. Therefore, insufficient driving force hinders further reduction of the wound area, and the wound size is an indicator that needle-free syringe users attach great importance to.

[0005] In addition, the existing common spring-powered, high-pressure pneumatic, and electromagnetic needle-free syringes and their consumables all have the problems of complex structure and high cost. When using a needle-free syringe, the medicine tube must first be installed on the syringe, and then the medicine tube is connected to the medicine extraction connector. The medicine solution is taken from the ampoule to the medicine tube through the medicine extraction connector, and then the injection operation is performed. The medicine tube and the medicine extraction connector are consumables of the needle-free syringe, and they need to be replaced after several uses. The current needle-free syringes all have pistons (or push rods), and the pistons (or push rods) are generally set in the medicine tube, which makes the structure of the medicine tube more complicated and the cost is very high. The high-cost consumables directly affect the promotion, application and development of needle-free syringes, so reducing the cost of use is also an issue that must be considered for needle-free syringes. Summary of the invention

[0006] In view of the above-mentioned shortcomings or deficiencies of the prior art, the present invention provides a needle-free syringe with an electric explosion unit as a driving source, which has a high liquid injection speed, a deeper injection depth, a smaller wound, and a lower cost.

[0007] In order to solve the above technical problems, the present invention has the following structure:

[0008] The ultra-high-speed jet needle-free syringe comprises a shell, an explosion chamber is provided in the shell, the explosion chamber is filled with a liquid medium, an electric explosion unit is located in the explosion chamber, the electric explosion unit and the shell are not electrically conductive, the electric explosion unit comprises a high-voltage positive electrode and a high-voltage negative electrode arranged in parallel, and a metal wire array connected between the high-voltage positive electrode and the high-voltage negative electrode, the metal wire array is surrounded by a plurality of metal wires to form a rotating body; a medicine tube is arranged inside the metal wire array, the length direction of the medicine tube is parallel to the center line of the metal wire array, and one end of the medicine tube spraying medicine liquid extends out of the shell; a high-voltage pulse power supply is connected to the high-voltage positive electrode and the high-voltage negative electrode of the electric explosion unit, and when the high-voltage pulse power supply is powered, the metal wire array undergoes an electric explosion, squeezing the medicine liquid in the medicine tube to be sprayed out at a high speed.

[0009] Furthermore, the medicine tube is located in the central area of ​​the metal wire array. The metal wires or metal foils in the metal wire array are evenly arranged at equal intervals.

[0010] On the basis of the above two schemes, the metal wire array rotating body is in the shape of a truncated cone, and the major diameter of the truncated cone is located on the side of the medicine liquid spraying direction.

[0011] Further, the electric explosion unit also includes an insulator, which includes at least two insulating threaded long rods arranged in parallel, and the high-voltage positive electrode and the high-voltage negative electrode are fixed on the long rods at intervals through nuts. The shell is a slender cavity structure, including a body and a cover plate, the middle of the body is separated by an isolation rib, one cavity is an explosion cavity, the insulator long rod of the electric explosion unit is fixed on the explosion cavity cover plate, the center line of the metal wire array of the electric explosion unit is parallel to the length direction of the shell and is installed in the body, the electric explosion unit and the explosion cavity cover plate are detachably installed on the body together, a sealing structure is provided between the explosion cavity cover plate and the body, a high-voltage pulse power supply is provided in the other cavity, one end of a connecting wire is connected to the positive electrode of the high-voltage pulse power supply, and the other end passes through the isolation rib and is arranged at the high-voltage positive electrode position, one end of another connecting wire is connected to the negative electrode of the high-voltage pulse power supply, and the other end passes through the isolation rib and is arranged at the high-voltage negative electrode position, when the axis of the electric explosion unit is parallel to the length direction of the shell and is installed in the body, the high-voltage positive electrode and the high-voltage negative electrode are electrically connected to the high-voltage pulse power supply. The high-voltage pulse power supply includes a power supply, a capacitor connected in parallel with the power supply, and an air switch connected in series between the capacitor and the high-voltage electrode of the electric explosion unit. When the air switch is in the disconnected position, the power supply charges the capacitor, and the charging ends after reaching the preset voltage; when using a needle-free syringe, press the injection button outside the shell to turn on the air switch and energize the electric explosion unit.

[0012] The shell supports and fixes the medicine tube by contacting the front end of the medicine tube, and the rear end of the medicine tube passes through the center holes on the high-voltage positive electrode and the high-voltage negative electrode, and the length direction of the medicine tube passes through the metal wire array. Or there is no hole on the high-voltage electrode far away from the front end of the medicine tube, and the rear end of the medicine tube contacts this high-voltage electrode as the final installation position when the medicine tube is loaded into the syringe.

[0013] An injection head is installed at the front end of the medicine tube, and a spray hole is opened on the injection head. The medicine tube is made of soft material.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The powerful shock wave released instantly by the electric explosion of the metal wire array in the present invention acts on the medicine tube, squeezing the medicine liquid to obtain a higher jet speed, which can reach 2000-5000m / s. The high-speed jet has greater penetration, and the medicine liquid enters the human tissue deeper. It can be used in occasions where the existing syringe cannot reach this injection depth, expanding the application scene and the scope of use. At the same time, due to the high jet speed, the diameter of the medicine tube spray hole can be further reduced, and the wound left by the syringe on the skin can also be reduced to tens of microns. The wound is small and easier to heal, which has more obvious advantages for subjects who need long-term injection of drugs.

[0016] The electric explosion unit of the needle-free syringe of the present invention has no piston, push rod, seal and complex driving mechanism, which is a new driving mode, greatly simplifies the structure of the needle-free syringe, and the structure of the medicine tube as a consumable material also becomes very simple, which greatly reduces the use cost of the needle-free syringe and accelerates the promotion and application of the needle-free syringe.

[0017] The metal wire array of the electric explosion unit is in the shape of a truncated cone, the drug tube is set in the central area of ​​the metal wire array, and the metal wires in the metal wire array are evenly arranged at equal intervals. The shock wave energy generated by the explosion of all the metal wires is superimposed to the maximum value at the center, and the shock wave exerts a balanced squeezing force on the drug tube from all directions, so the drug liquid is sprayed out at a higher speed without deflection.

[0018] All parts of the needle-free syringe of the present invention are concentrated in the housing, which is not only simple and beautiful in appearance, but also safer. The electric explosion unit and the explosion chamber cover plate can be assembled and disassembled from the housing at the same time, which is easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : The outline diagram of the ultra-high-speed jet needle-free syringe of the present invention;

[0020] Figure 2 : A cross-sectional view of the ultra-high-speed jet needle-free injector of the present invention;

[0021] Figure 3 : A three-dimensional view of the ultra-high-speed jet needle-free syringe of the present invention after the shell is removed;

[0022] Figure 4 : Circuit diagram of high voltage pulse power supply.

[0023] 1-shell, 11-explosion chamber, 12-explosion chamber cover, 2-charge tube, 3-electric explosion unit, 31-high voltage positive electrode, 32-high voltage negative electrode, 33-metal wire array, 34-insulator, 4-injection head, 5-high voltage pulse power supply, 51-power supply, 52-capacitor, 53-air switch, 6-injection button. DETAILED DESCRIPTION

[0024] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0025] The ultra-high-speed jet needle-free injector of the present invention arranges a high-voltage positive electrode, a high-voltage negative electrode and a metal wire array between the two in the liquid in the shell as a driving source. After the high-voltage current is passed, the shock wave generated by the electric explosion of the metal wire array squeezes the medicine tube located in the center of the shell, and the medicine liquid in the medicine tube is ejected at high speed and penetrates the human skin into the body to achieve needle-free injection. The present invention uses the principle of ultra-high-speed water jet generated by the electric explosion of the metal wire to make the jet speed of the medicine liquid higher and the injection depth deeper. The ultra-high-speed medicine liquid can reduce the wound area, and the medicine tube is a disposable consumable, and a hose can be used, which has a simple structure and effectively reduces the cost of consumables.

[0026] Embodiment 1

[0027] like Figure 2 and Figure 3 As shown, the ultra-high-speed jet needle-free syringe of the present invention comprises a housing 1, the housing 1 is a cavity structure, the housing 1 has an explosion cavity 11, the cavity is filled with liquid medium, the electric explosion unit 3 is located in the explosion cavity 11, and the electric explosion unit 3 and the housing 1 are not conductive. The electric explosion unit 3 comprises a high-voltage positive electrode 31 and a high-voltage negative electrode 32 arranged in parallel with a spacing, and a metal wire array 33 connected between the high-voltage positive electrode 31 and the high-voltage negative electrode 32. The metal wire array 33 is a wire array set formed by a plurality of metal wires in the shape of a rotating body, the axis of the rotating body is the center line of the metal wire array 33, and the internal space enclosed by the metal wire array 33 is a wire array space. A medicine tube 2 is arranged in the wire array space, the length direction of the medicine tube 2 is parallel to the center line of the metal wire array 33, one end of the medicine tube 2 for spraying medicine liquid is the front end, and the other end is the tail end, and the front end extends out of the housing 1. The high-voltage positive electrode 31 and the high-voltage negative electrode 32 are electrically connected to a high-voltage pulse power supply 5. The high-voltage pulse power supply 5 is placed inside or outside the housing 1.

[0028] The metal wire may be replaced by metal foil.

[0029] When the ultra-high-speed jet needle-free injector is working, the medicine tube 2 first draws the medicine liquid from the ampoule and then loads it into the shell 1. The high-voltage pulse power supply 5 is energized to generate a pulse current between the high-voltage positive electrode 31 and the high-voltage negative electrode 32. Each time the pulse current is injected into the metal wire array 33, the metal wire undergoes a rapid phase change under the action of Joule heating, and successively experiences solid, liquid, gas and plasma states, and finally develops into a plasma channel. At the same time, accompanied by physical phenomena such as light radiation and shock waves, the volume of the metal wire undergoes a huge change in the gasification stage, and a shock wave is generated in the liquid medium. This process can be approximately regarded as a virtual cylindrical piston rapidly expanding outward. The shock wave energy generated by each metal wire converges in the wire array space, squeezing the medicine liquid in the medicine tube 2. The medicine liquid is ejected from the front end of the medicine tube 2 at high speed, penetrates the skin and is injected into the human body.

[0030] The powerful shock wave released by the electric explosion of the metal wire array in the present invention acts on the medicine tube 2, squeezing the liquid medicine to obtain a higher jet speed, which can reach 2-5km / s. The high-speed jet penetrates the human tissue to a deeper depth, which is suitable for occasions where the existing syringe cannot reach this injection depth, expanding the application scene of the needle-free syringe and making it more widely used. At the same time, due to the high jet speed, the diameter of the spray hole of the medicine tube 2 can be further reduced, and the wound left by the syringe on the skin can also be reduced to tens of microns. The wound is small and easier to heal, which is particularly advantageous for subjects who need long-term injection of drugs.

[0031] The shock wave generated by the electric explosion unit 3 of the needle-free syringe in the liquid medium directly squeezes the liquid medicine in the medicine tube 2 to spray out. There is no piston, push rod, seal and complicated driving mechanism. It is a new driving method, which greatly simplifies the structure of the needle-free syringe. The structure of the medicine tube 2 as a consumable also becomes very simple, and the cost is naturally lower. Therefore, the use cost of the needle-free syringe of the present invention is greatly reduced, which is crucial for the application and promotion of needle-free syringes.

[0032] In this embodiment, the medicine tube 2 is preferably arranged in the central area of ​​the metal wire array 33, because the metal wire array 33 is in the shape of a rotating body, and each metal wire is at an equal distance from the center line of the metal wire array 33. The shock wave energy generated by the explosion of all metal wires is superimposed to the maximum value at the center, and the speed of the liquid medicine spraying is the highest. On this basis, if the metal wires or metal foils in the metal wire array 33 are evenly arranged at equal intervals, the extrusion force of the shock waves in all directions on the medicine tube 2 is balanced, ensuring that the liquid medicine is sprayed along the center line direction of the metal wire array 33 without deflection.

[0033] Embodiment 2

[0034] The metal wire array 33 of the electric explosion unit 3 can be cylindrical or truncated cone, preferably truncated cone (see Figure 2 ), the metal wires are arranged obliquely, and the large diameter of the cone is located on the side of the liquid medicine spraying direction. On the one hand, in a limited space, the inclined metal wires are longer and the energy of the electric explosion is higher; on the other hand, the electric explosion impact force of each inclined metal wire has an axial component, and the axial components are gathered and superimposed at the center line, which increases the axial thrust on the liquid medicine, and the liquid medicine is sprayed horizontally at a higher speed.

[0035] See Figure 3 The electric explosion unit 3 also includes an insulator 34, which is used to fix the high-voltage positive electrode 31 and the high-voltage negative electrode 32. The insulator 34 can be at least two parallel insulating threaded long rods, and the high-voltage positive electrode 31 and the high-voltage negative electrode 32 are fixed to the insulating long rods with a spacing through nuts.

[0036] Embodiment 3

[0037] The shell 1 (or the cover plate made into the shell here) supports and fixes the medicine tube 2 by contacting the front end of the medicine tube 2 ( Figure 3 The tail end of the medicine tube 2 passes through the central holes on the high-voltage positive electrode 31 and the high-voltage negative electrode 32, passes through the entire metal wire array 33, or is away from the front end of the medicine tube 2 ( Figure 3 The high-voltage electrode at the right end of the medicine tube 2 is not opened, and the tail end of the medicine tube 2 contacts the high-voltage electrode as the final installation position when the medicine tube 2 is loaded into the syringe. In short, the length of the medicine tube 2 in the space of the metal wire array 33 is not less than the distance between the high-voltage positive electrode 31 and the high-voltage negative electrode 32, and the shock wave energy generated by the electric explosion of the metal wire array 33 can all act on the medicine tube 2, so that the spraying speed of the medicine liquid reaches the maximum value.

[0038] The tail end of the medicine tube 2 is closed, and a spray hole is set at the front end, or an injection head 4 is installed, and a spray hole is opened on the injection head 4, and the diameter of the spray hole can be as small as tens of microns. Because the spraying speed of the liquid medicine of the present invention is relatively high, the liquid medicine with a small spray hole diameter can also be sprayed normally, and the smaller the jet diameter, the smaller the skin wound is, and the more conducive it is to healing. The injection head 4 is set separately and installed at the front end of the medicine tube 2. After each injection, only the injection head 4 needs to be replaced, which further reduces the consumables cost of the needle-free injector, thereby reducing the use cost of the needle-free injector.

[0039] The medicine tube 2 is made of soft material, such as a plastic tube. The liquid shock wave squeezes the soft material, and the deformation of the medicine tube 2 can better transmit the squeezing force to the internal medicine liquid, thereby increasing the speed of the medicine liquid spraying.

[0040] Embodiment 4

[0041] like Figure 1 and Figure 2 As shown, the shell 1 is a slender cavity structure, including a body and a cover plate, the body is divided into two parts on the left and right by an isolation rib, and the left cavity is an explosion cavity 11 accommodating the electric explosion unit 3. The electric explosion unit 3 is fixed on the explosion cavity cover plate 12, specifically, the insulator 34 long rod of the electric explosion unit 3 is fixed to the explosion cavity cover plate 12, and the center line of the metal wire array 33 of the electric explosion unit 3 is parallel to the length direction of the shell 1 and installed in the body, and the electric explosion unit 3 and the explosion cavity cover plate 12 are detachably installed on the body together, which is convenient for replacing the metal wire, and preferably a snap-on detachable connection is more convenient for assembly and disassembly, and a sealing structure is provided between the explosion cavity cover plate 12 and the body. A high-voltage pulse power supply 5 (excluding an external power supply) is arranged in the right cavity, one end of a connecting wire is connected to the positive electrode of the high-voltage pulse power supply 5, and the other end passes through the isolation rib and is arranged at the position of the high-voltage positive electrode 31, one end of another connecting wire is connected to the high-voltage pulse negative electrode, and the other end passes through the isolation rib and is arranged at the position of the high-voltage negative electrode 32. When the electric explosion unit 3 is loaded into the shell 1, the high-voltage positive electrode 31 and the high-voltage negative electrode 32 are electrically connected to the high-voltage pulse power supply 5 at the same time.

[0042] The electric explosion unit 3 can also be fixed in other ways, for example: the shell 1 is still an elongated cavity structure, divided into left and right parts, the explosion chamber 11 is not provided with a cover plate, and a connecting bracket made of insulating material can be provided in the cavity. The electric explosion unit 3 can be detachably installed on the connecting bracket, and a sealing structure is added between the shell 1.

[0043] like Figure 1 As shown, all parts of the needle-free syringe of the present invention are concentrated in the housing, which is not only simple and beautiful in appearance, but also safer. The electric explosion unit and the explosion chamber cover plate can be assembled and disassembled from the housing at the same time, which is easier to operate.

[0044] The circuit diagram of the high voltage pulse power supply 5 in the above embodiment is shown in Figure 4 , including a power supply 51, a capacitor 52 connected in parallel with the power supply 51, the power supply 51 charges the capacitor 52 through a regulating transformer, and an air switch 53 is connected in series between the capacitor 52 and the high-voltage electrode of the electric explosion unit 3. When the air switch 53 is in the disconnected position, the power supply 51 charges the capacitor 52, and the charging ends after the preset voltage is reached; when the needle-free syringe is used, the air switch 53 is turned on, and the capacitor releases a kilovolt voltage to power the high-voltage electrode, causing the metal wire to explode electrically.

[0045] An injection button 6 is arranged outside the housing 1 of the needle-free syringe and is connected to the air switch 53 of the high-voltage pulse power supply 5 to control the on and off of the air switch 53. Each time the button is pressed, an injection is completed.

[0046] The ultra-high-speed jet needle-free syringe of the present invention has a high liquid injection speed and penetrates deeper into human tissue, thus expanding the application scenarios and the scope of use. The wound left by the syringe on the skin is smaller and easier to heal. Because the new driving structure is simpler and the cost of consumables is lower, it is very advantageous in situations where long-term drug injections are required.

[0047] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. An ultra-high-speed jet needle-free syringe, characterized in that: The invention comprises a shell (1), wherein the shell (1) has an explosion chamber (11), wherein the explosion chamber (11) is filled with a liquid medium, wherein an electric explosion unit (3) is located in the explosion chamber (11), wherein the electric explosion unit (3) and the shell (1) are non-conductive, wherein the electric explosion unit (3) comprises a high-voltage positive electrode (31) and a high-voltage negative electrode (32) arranged in parallel, and a metal wire array (33) connected between the high-voltage positive electrode (31) and the high-voltage negative electrode (32), wherein the metal wire array (33) comprises a plurality of metal wires. The metal wire array (33) is enclosed in a shape of a rotating body; a medicine tube (2) is arranged inside the metal wire array (33); the length direction of the medicine tube (2) is parallel to the center line of the metal wire array (33); one end of the medicine tube (2) spraying medicine liquid extends outside the shell (1); a high-voltage pulse power supply (5) is connected to the high-voltage positive electrode (31) and the high-voltage negative electrode (32) of the electric explosion unit (3); when the high-voltage pulse power supply (5) supplies power, the metal wire array (33) undergoes an electric explosion, squeezing the medicine liquid in the medicine tube (2) to be ejected at a high speed.

2. The ultra-high-speed jet needle-free injector according to claim 1, characterized in that: The medicine tube (2) is located in the central area of ​​the metal wire array (33).

3. The ultra-high-speed jet needle-free injector according to claim 2, characterized in that: The metal wires or metal foils in the metal wire array (33) are evenly arranged at equal intervals.

4. The ultra-high-speed jet needle-free injector according to claim 1 or 3, characterized in that: The rotating body of the metal wire array (33) is in the shape of a truncated cone, and the major diameter of the truncated cone is located on the side of the medicine liquid spraying direction.

5. The ultra-high-speed jet needle-free injector according to claim 1, characterized in that: The electric explosion unit (3) further comprises an insulator (34), wherein the insulator (34) comprises at least two insulating threaded long rods arranged in parallel, and the high-voltage positive electrode (31) and the high-voltage negative electrode (32) are fixed to the long rods at a distance via nuts.

6. The ultra-high-speed jet needle-free injector according to claim 1, characterized in that: The shell (1) supports and fixes the medicine tube (2) by contacting the front end of the medicine tube (2); the rear end of the medicine tube (2) passes through the central holes on the high-voltage positive electrode (31) and the high-voltage negative electrode (32); and the medicine tube (2) passes through the metal wire array (33) in the length direction.

7. The ultra-high-speed jet needle-free injector according to claim 1, characterized in that: The shell (1) supports and fixes the medicine tube (2) by contacting the front end of the medicine tube (2); no hole is opened on the high-voltage electrode away from the front end of the medicine tube (2); when the medicine tube (2) is installed in the syringe, the rear end contacts the high-voltage electrode as the final installation position.

8. The ultra-high-speed jet needle-free injector according to claim 1, characterized in that: An injection head (4) is installed at the front end of the medicine tube (2), and a spray hole is opened on the injection head (4).

9. The ultra-high-speed jet needle-free injector according to claim 1, characterized in that: The medicine tube (2) is made of soft material.

10. The ultra-high-speed jet needle-free injector according to claim 5, characterized in that: The shell (1) is a slender cavity structure, comprising a body and a cover plate, the middle of the body is separated by an isolation rib, one cavity is the explosion cavity (11), the long rod of the insulator (34) of the electric explosion unit (3) is fixed on the explosion cavity cover plate (12), the center line of the metal wire array (33) of the electric explosion unit (3) is parallel to the length direction of the shell (1) and is installed in the body, the electric explosion unit (3) and the explosion cavity cover plate (12) are detachably mounted on the body, and the explosion cavity cover plate (12) is connected to the body. A sealing structure is provided between the two bodies, the high-voltage pulse power supply (5) is provided in the other cavity, one end of a connecting wire is connected to the positive electrode of the high-voltage pulse power supply (5), and the other end passes through the isolation rib and is provided at the position of the high-voltage positive electrode (31), and one end of another connecting wire is connected to the negative electrode of the high-voltage pulse power supply (5), and the other end passes through the isolation rib and is provided at the position of the high-voltage negative electrode (32). When the electric explosion unit (3) is installed in the body, the high-voltage positive electrode (31), the high-voltage negative electrode (32) and the high-voltage pulse power supply (5) are electrically connected.

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