WO2021112485A1 - Seringue sans aiguille - Google Patents

Seringue sans aiguille Download PDF

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Publication number
WO2021112485A1
WO2021112485A1 PCT/KR2020/016908 KR2020016908W WO2021112485A1 WO 2021112485 A1 WO2021112485 A1 WO 2021112485A1 KR 2020016908 W KR2020016908 W KR 2020016908W WO 2021112485 A1 WO2021112485 A1 WO 2021112485A1
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WO
WIPO (PCT)
Prior art keywords
piston
current
coil
backward
magnetic body
Prior art date
Application number
PCT/KR2020/016908
Other languages
English (en)
Korean (ko)
Inventor
이성헌
김성현
박종민
고다인
김정국
Original Assignee
바즈바이오메딕 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 바즈바이오메딕 주식회사 filed Critical 바즈바이오메딕 주식회사
Publication of WO2021112485A1 publication Critical patent/WO2021112485A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
    • A61M5/3007—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules with specially designed jet passages at the injector's distal end
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/44—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for cooling or heating the devices or media
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M2005/3103—Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
    • A61M2005/3106—Plugs for syringes without needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M2005/3143—Damping means for syringe components executing relative movements, e.g. retarders or attenuators slowing down or timing syringe mechanisms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/82—Internal energy supply devices
    • A61M2205/8275—Mechanical
    • A61M2205/8281—Mechanical spring operated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/82—Internal energy supply devices
    • A61M2205/8275—Mechanical
    • A61M2205/8287—Mechanical operated by an external magnetic or electromagnetic field

Definitions

  • the present invention relates to a needle-free syringe, and more particularly, to a needle-free syringe capable of repeatedly injecting a drug at high speed without an injection needle.
  • a syringe is a device for injecting a chemical solution into the tissue of an organism.
  • the syringe is composed of a needle inserted into the body, a syringe in which the drug solution is accommodated, and a piston that reciprocates inside the syringe and pushes the drug solution into the needle.
  • the needle is punctured to allow the drug to be injected when injected.
  • the existing needleless syringe is configured to inject a predetermined amount of a drug into only one part of the skin at a time, damage to the skin tissue may occur.
  • a needleless syringe a body formed in a hollow shape; a solenoid coil wound around the outer circumferential surface of the body; a cylinder coupled to the open front surface of the body in communication with a drug receiving part for receiving a drug, and a nozzle part for discharging the drug accommodated in the drug receiving part to the front;
  • a moving magnetic body that is long inserted into the body in the longitudinal direction and that reciprocates forward and backward by a magnetic force generated when a current is applied to the solenoid coil, is inserted in the body in front of the moving magnetic body, and the movement a piston which moves forward by the impact force applied by the moving magnetic body during the forward movement of the magnetic body to press the drug in the drug accommodating part to the nozzle part; It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed out by the hydraulic pressure applied by the drug from the drug accommodating part to open the communication hole, and when the hydraulic pressure is released a nozzle part
  • a stationary magnetic body magnetized by a magnetic force generated when a current is applied to pull the moving magnetic body in a backward movement direction by electrical attraction; Supplying a current to the first coil and blocking the current to the second coil when the moving magnetic body moves forward, and cutting off the current to the first coil and supplying a current to the second coil when the moving magnetic body moves backward a repeating current supply; and an elastic member installed between the piston and the cylinder to apply an elastic force to the piston in a backward direction when the moving magnetic body moves backward.
  • the body further includes a cooling chamber provided to surround the outside of the solenoid coil from the outside of the body to absorb heat generated in the solenoid coil through a cooling fluid to cool it.
  • a recoil canceling unit for canceling the recoil generated during the forward movement or backward movement of the piston
  • the recoil canceling unit the recoil offsetting coil wound at a position spaced apart from the solenoid coil by a predetermined distance rearward on the outer circumferential surface of the body; , is inserted to be spaced apart from the piston at a predetermined interval in the interior of the body, and is provided to reciprocate forward and backward in the opposite direction to the piston by a magnetic force generated when a current is applied to the recoil canceling coil.
  • the blocker is fixedly installed on the inner circumferential surface of the cylinder, and a ring-shaped fixed blocker having a female thread formed on the inner circumferential surface, and the inner circumferential surface of the fixed blocker is screwed to the inner circumferential surface of the fixed blocker and formed to be caught by the flange portion, the coupling is screwed to the fixed blocker Includes adjustable length blockers with adjustable length.
  • the drug accommodating part is formed in a diverging nozzle shape including a reduced portion whose cross-sectional area decreases toward the front, and an enlarged portion extending from the reduced portion to increase the cross-sectional area again, and the pressure generated when the piston moves backward in the reduced portion A drug supply hole through which a drug is supplied from the outside by the car is formed.
  • the nozzle unit opening/closing valve includes a ball installed in the communication hole, and an elastic member installed in the nozzle unit to support the ball.
  • the moving magnetic material is made of any one or a combination of two or more of a ferromagnetic material, a quasi-ferromagnetic material, and a permanent magnet.
  • the fixed magnetic material is made of any one of a ferromagnetic material, a quasi-ferromagnetic material, and a permanent magnet, or a combination of two or more.
  • the current supply unit is connected to the first coil, stores a current supplied from an external power supply source, supplies the stored current to the first coil when the piston moves forward, and supplies the stored current to the first coil when the piston moves backward. and a capacitor for blocking power supply, and a DC power supply unit connected to the second coil and supplying a current supplied from the external power supply source to the second coil when the piston moves backward.
  • a needleless syringe a body formed in a hollow shape; a solenoid coil wound around the outer circumferential surface of the body; a cylinder coupled to the open front surface of the body in communication with a drug receiving part for receiving a drug, and a nozzle part for discharging the drug accommodated in the drug receiving part to the front; a moving magnetic body which is long inserted into the body in the longitudinal direction and reciprocates forward and backward by a magnetic force generated when a current is applied to the solenoid coil; a piston inserted in the interior of the body in front of the moving magnetic body and moving forward by the impact force applied by the moving magnetic body when the moving magnetic body moves forward to press the drug in the drug accommodating unit to the nozzle unit; It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed out by the hydraulic pressure applied by the drug from the drug accommodating part to open the communication hole, and when the hydraulic pressure is released a nozzle part
  • a stationary magnetic body magnetized by a magnetic force generated when a current is applied to pull the moving magnetic body in a backward movement direction by electrical attraction; Supplying a current to the first coil and blocking the current to the second coil when the moving magnetic body moves forward, and cutting off the current to the first coil and supplying a current to the second coil when the moving magnetic body moves backward a repeating current supply; It is installed between the piston and the cylinder, and includes an elastic member for applying an elastic force to the piston in a backward direction when the moving magnetic body moves backward, and a recoil canceling part for canceling the recoil generated when the piston moves forward or backward. , A flange portion protruding radially from the outer circumferential surface of the piston, and a blocker provided between the piston and the cylinder, the flange portion is caught during the forward movement of the piston to limit the forward movement distance of the piston.
  • a needleless syringe a body formed in a hollow shape; a solenoid coil wound around the outer circumferential surface of the body; a cylinder coupled to the open front surface of the body in communication with a drug receiving part for receiving a drug, and a nozzle part for discharging the drug accommodated in the drug receiving part to the front; a moving magnetic body which is long inserted into the body in the longitudinal direction and reciprocates forward and backward by a magnetic force generated when a current is applied to the solenoid coil; a piston inserted in the interior of the body in front of the moving magnetic body and moving forward by the impact force applied by the moving magnetic body when the moving magnetic body moves forward to press the drug in the drug accommodating unit to the nozzle unit; It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed out by the hydraulic pressure applied by the drug from the drug accommodating part to open the communication hole, and when the hydraulic pressure is released a nozzle part
  • the solenoid coil is wound in front of the outer circumferential surface of the body, and a current is applied during the forward movement of the piston to generate a magnetic force in the direction in which the moving magnetic body moves forward, and the first coil on the outer circumferential surface of the body and a second coil wound more rearward, and to which a current is applied when the piston moves backward, thereby generating a magnetic force so that the moving magnetic body moves backward.
  • the forward/backward driving means supplies a current to the first coil and cuts off the current to the second coil when the piston moves forward, and cuts off the current to the first coil when the piston moves backward and to the second coil.
  • a current supply unit that repeats supplying current, and an elastic member installed between the piston and the cylinder to apply an elastic force to the piston in a backward direction when the moving magnetic body moves backward.
  • the forward/backward driving means is installed between the body and the piston, and a current supply unit for moving the piston forward by repeating supply and blocking of current at a preset period to the solenoid coil, and the current supply unit supplies current
  • the forward and backward driving means by repeatedly switching the direction of the current applied to the solenoid coil at a preset period, and periodically switching the direction of the magnetic force generated when the current is applied to the solenoid coil, the piston moves forward and backward It includes a current supply that periodically repeats the movement.
  • the current supply unit stores a current supplied from an external power source, supplies the stored current to the solenoid coil when the piston moves forward, and blocks the supply of current to the solenoid coil when the piston moves backward. And, the piston and a DC power supply for supplying a current supplied from the external power supply to the solenoid coil when moving backward.
  • the body further includes a cooling chamber provided to surround the outside of the solenoid coil from the outside of the body to absorb heat generated in the solenoid coil through a cooling fluid to cool it.
  • the recoil offset portion the recoil offset coil wound at a position spaced apart from the solenoid coil rearward by a predetermined distance on the outer circumferential surface of the body, is inserted to be spaced apart from the piston by a predetermined distance in the interior of the body, the recoil offset
  • a magnetic body for recoil cancellation provided to reciprocate forward and backward in the opposite direction to the piston by the magnetic force generated when a current is applied to the coil, and when the current is supplied to the solenoid coil, to the solenoid coil for the recoil cancellation coil
  • it includes a recoil offsetting current supply for generating a magnetic force in a direction opposite to the direction of movement of the piston.
  • the blocker is fixedly installed on the inner circumferential surface of the cylinder, and a ring-shaped fixed blocker having a female thread formed on the inner circumferential surface, is screwed to the inner circumferential surface of the fixed blocker and is formed to be caught by the flange portion, and is screwed to the fixed blocker and a length-adjustable blocker with adjustable binding length.
  • the drug accommodating part is formed in a diverging nozzle shape including a reduced portion whose cross-sectional area decreases toward the front, and an enlarged portion extending from the reduced portion to increase the cross-sectional area again, and the pressure generated when the piston moves backward in the reduced portion A drug supply hole through which a drug is supplied from the outside by the car is formed.
  • the nozzle unit opening/closing valve includes a ball installed in the communication hole, and an elastic member installed in the nozzle unit to support the ball.
  • the moving magnetic material is made of any one or a combination of two or more of a ferromagnetic material, a quasi-ferromagnetic material, and a permanent magnet.
  • a needle-free syringe comprising: a body formed in a hollow shape; a solenoid coil wound around the outer circumferential surface of the body; a cylinder coupled to the open front surface of the body in communication with a drug receiving part for receiving a drug, and a nozzle part for discharging the drug accommodated in the drug receiving part to the front; a moving magnetic body which is long inserted into the body in the longitudinal direction and reciprocates forward and backward by a magnetic force generated when a current is applied to the solenoid coil; a piston inserted in the interior of the body in front of the moving magnetic body and moving forward by the impact force applied by the moving magnetic body when the moving magnetic body moves forward to press the drug in the drug accommodating unit to the nozzle unit; It is provided to open and close the communication hole between the nozzle part and the drug accommodating part, and when the piston moves forward, it is pushed out by the hydraulic pressure applied by the drug from the drug accommodating part to open the communication hole, and when the hydraulic pressure is released
  • the solenoid coil is wound in front of the outer circumferential surface of the body, and a current is applied during the forward movement of the piston to generate a magnetic force in the direction in which the moving magnetic body moves forward, and the first coil on the outer circumferential surface of the body and a second coil wound more rearward, and to which a current is applied when the piston moves backward, thereby generating a magnetic force so that the moving magnetic body moves backward.
  • the forward/backward driving means supplies a current to the first coil and cuts off the current to the second coil when the piston moves forward, and cuts off the current to the first coil when the piston moves backward and to the second coil.
  • a current supply unit that repeats supplying current, and an elastic member installed between the piston and the cylinder to apply an elastic force to the piston in a backward direction when the moving magnetic body moves backward.
  • the forward/backward driving means is installed between the body and the piston, and a current supply unit for moving the piston forward by repeating supply and blocking of current at a preset period to the solenoid coil, and the current supply unit supplies current
  • the forward and backward driving means by repeatedly switching the direction of the current applied to the solenoid coil at a preset period, and periodically switching the direction of the magnetic force generated when the current is applied to the solenoid coil, the piston moves forward and backward It includes a current supply that periodically repeats the movement.
  • the current supply unit stores a current supplied from an external power source, supplies the stored current to the solenoid coil when the piston moves forward, and blocks the supply of current to the solenoid coil when the piston moves backward. And, the piston and a DC power supply for supplying a current supplied from the external power supply to the solenoid coil when moving backward.
  • the body further includes a cooling chamber provided to surround the outside of the solenoid coil from the outside of the body to absorb heat generated in the solenoid coil through a cooling fluid to cool it.
  • a recoil canceling unit for canceling the recoil generated during the forward movement or backward movement of the piston
  • the recoil canceling unit the recoil offsetting coil wound at a position spaced apart from the solenoid coil by a predetermined distance rearward on the outer circumferential surface of the body; , is inserted to be spaced apart from the piston at a predetermined interval in the interior of the body, and is provided to reciprocate forward and backward in the opposite direction to the piston by a magnetic force generated when a current is applied to the recoil canceling coil.
  • the present invention has an advantage in that the kinetic magnetic body collides with the piston and moves the piston forward, thereby enabling the drug to be injected at a higher speed using less energy.
  • the needleless syringe according to the present invention is configured to repeatedly reciprocate forward and backward by pressing the drug and injecting the drug, so that it is possible to repeatedly inject a predetermined drug at high speed, so that it can be used in the face of skin care, etc. It has the advantage of being able to inject multiple times instead of once in a single treatment on a wider range of skin such as the back.
  • the needleless syringe according to the present invention by including a recoil offset for offsetting the recoil generated during the forward and backward movement of the piston, ease of use can be further improved.
  • the amount of drug injection at one time can be adjusted.
  • the piston cover is provided between the cylinder and the piston, there is an advantage in that the drug is prevented from being deposited on the end of the piston, so that the user does not need to wipe the end of the piston.
  • FIG. 1 is a cutaway perspective view showing a needleless syringe according to a first embodiment of the present invention.
  • Figure 2 is a view showing the forward movement state of the piston of the needleless syringe according to the first embodiment of the present invention.
  • FIG 3 is a view showing a backward movement state of the piston of the needleless syringe according to the first embodiment of the present invention.
  • FIG. 4 is a graph showing the current supply waveform applied to the solenoid coil of the needleless syringe according to the first embodiment of the present invention.
  • FIG. 5 is a view showing a nozzle opening/closing valve of the needleless syringe according to the first embodiment of the present invention.
  • FIG. 6 is a cross-sectional view showing a needleless syringe according to a second embodiment of the present invention.
  • FIG. 7 is a view showing the forward movement state of the piston of the needleless syringe according to the third embodiment of the present invention.
  • FIG. 8 is a view showing a backward movement state of the piston of the needleless syringe according to the third embodiment of the present invention.
  • FIG. 9 is a view showing the forward movement state of the piston of the needleless syringe according to the fourth embodiment of the present invention.
  • FIG. 10 is a view showing a backward movement state of the piston of the needleless syringe according to the fourth embodiment of the present invention.
  • FIG. 11 is a view showing the forward movement state of the piston of the needleless syringe according to the fifth embodiment of the present invention.
  • FIG. 12 is a view showing the backward movement state of the piston of the needleless syringe according to the fifth embodiment of the present invention.
  • FIG. 13 is a graph showing an example of the current supply waveform applied to the solenoid coil of the needleless syringe according to the fifth embodiment of the present invention.
  • FIG 14 is a graph showing another example of the current supply waveform applied to the solenoid coil of the needleless syringe according to the fifth embodiment of the present invention.
  • 15 is a cross-sectional view showing a needleless syringe according to a sixth embodiment of the present invention.
  • 16 is a view showing the forward movement state of the piston of the needleless syringe according to the seventh embodiment of the present invention.
  • 17 is a view showing the backward movement state of the piston of the needleless syringe according to the seventh embodiment of the present invention.
  • FIG. 18 is a cross-sectional view showing a needleless syringe according to an eighth embodiment of the present invention.
  • FIG. 1 is a cutaway perspective view showing a needleless syringe according to a first embodiment of the present invention.
  • the needleless syringe 100 according to the first embodiment of the present invention, a body 10, a cylinder 20, a solenoid coil 30, a magnetic body 90, a piston 40, It includes a nozzle opening/closing valve 50 , a forward/backward driving means 60 , a blocker 70 and an elastic member 80 .
  • the moving magnetic body 90 moves forward by the magnetic force generated by the solenoid coil 30, the moving magnetic body 90 collides with the piston 40 and the piston ( 40) is an impact-type syringe that moves forward.
  • the body 10 is formed in a hollow shape and is formed to be elongated in the longitudinal direction.
  • the front of the body 10 is formed to be opened.
  • the cylinder 20 is screwed to the front of the body 10 .
  • the cylinder 20 is coupled in communication with the open front surface of the body 10 .
  • the cylinder 20 is formed in a hollow shape, the cylinder main hole 21, the drug receiving portion 22 and the nozzle portion 23 are formed to communicate.
  • the cylinder main hole 21 is formed in the inner rear of the cylinder 20, and the front end of the body 10 is inserted and screwed into at least a portion of the cylinder 20 so that the screw thread is formed.
  • the drug accommodating part 22 is formed to have a reduced cross-sectional area than the body coupling hole 21 .
  • the drug accommodating part 22 is a passage through which the piston 40 is moved in close contact, and is a receiving space in which the drug is accommodated.
  • the drug receiving portion 22 is formed in a diverging nozzle shape including a reduced portion 22a whose cross-sectional area is gradually decreased toward the front, and an enlarged portion 22b that extends from the reduced portion 22a and increases in cross-sectional area again. do.
  • a drug supply hole 22c for supplying a drug from the outside is formed in the reduced portion 22a by a pressure difference generated when the piston 40 moves backward.
  • a drug charger 25 is coupled to the drug supply hole 22c.
  • the nozzle part 23 is formed to communicate with the drug accommodating part 22 and to gradually decrease in cross-sectional area, so as to spray the drug accommodated in the drug accommodating part 22 .
  • the cylinder 20 is a first block in which the body coupling hole 21 and the drug receiving part 22 are formed, and the second block in which the nozzle part 23 is formed is coupled to each other.
  • the present invention is not limited thereto, and it is of course possible that the first block and the second block are integrally formed.
  • the solenoid coil 30 includes a first coil 31 and a second coil 32 .
  • the first coil 31 and the second coil 32 are disposed to be spaced apart from each other by a predetermined distance along the longitudinal direction of the body 10 .
  • the first coil 31 is a coil wound on the front side of the outer circumferential surface of the body 10 to which a current is applied when the piston 40 moves forward.
  • the first coil 31 generates a magnetic force in a direction in which the moving magnetic body 90 moves forward when a current is applied, and serves to move the moving magnetic body 90 forward.
  • the second coil 32 is a coil wound around the rear side of the outer circumferential surface of the body 10 to which a current is applied when the piston 40 moves backward.
  • the second coil 32 serves to move the moving magnetic body 00 backward when a current is applied.
  • the piston 40 is long inserted in the longitudinal direction into the body 10 and the cylinder 20 serves to push the drug accommodated in the drug receiving portion (22).
  • the piston 40 is provided separately from the moving magnetic body 90 inside the body 10 , and is inserted in front of the moving magnetic body 90 .
  • a flange portion 43 is formed on the outer peripheral surface of the piston 40 to protrude in the radial direction to limit the movement distance of the piston 40 .
  • the flange portion 43 is caught by a length adjustment blocker 72 to be described later when the piston 40 moves forward, thereby limiting the forward movement distance of the piston 40 .
  • a blocker 70 is detachably coupled between the cylinder 20 and the piston 40 .
  • the blocker 70 is screwed to the inner circumferential surface of the fixed blocker 71 coupled to the cylinder main hole 21 and fixed, and the fixed blocker 71 to adjust the length coupled to the fixed blocker 71 .
  • Possible length-adjustable blockers 72 are included.
  • the fixed blocker 71 has a female thread formed on an inner circumferential surface, and is formed in a ring shape.
  • the length adjustment blocker 72 is formed with a male thread on the outer peripheral surface, is formed in a ring shape. A predetermined interval is formed between the length adjustment blocker 72 and the piston 40 , and the piston 40 passes through the inside of the length adjustment blocker 72 to move forward and backward.
  • the length-adjustable blocker 72 is screwed at the rear of the fixed blocker 72, and the length of the length-adjustable blocker 72 screw-coupled to the coupling length can be adjusted differently depending on the amount of drug injected at one time.
  • the length at which the length adjustment blocker 72 protrudes backward becomes shorter.
  • the distance d between the length adjustment blocker 72 and the flange portion 43 increases, so the forward movement distance of the piston 40 (d) becomes longer.
  • a single injection amount of the drug is increased.
  • the length adjustment blocker 72 screwed to the fixed blocker 71 becomes shorter, the length at which the length adjustment blocker 72 protrudes backward becomes longer.
  • the distance d between the length adjustment blocker 72 and the flange portion 43 becomes shorter, so the forward movement distance of the piston 40 (d) is shortened.
  • the forward movement distance d of the piston 40 is shorter, the amount of drug injected at one time is reduced.
  • the user can finely adjust the amount of one injection of the drug by adjusting the length at which the length adjustment blocker 72 is coupled to the fixed blocker 71 .
  • the moving magnetic body 90 is long inserted into the body 10 in the longitudinal direction, and reciprocates forward and backward by a magnetic force generated when a current is applied to the first coil 31 .
  • the moving magnetic material 90 may be formed of any one of a ferromagnetic material, a quasi-ferromagnetic material, and a permanent magnet, or a combination of two or more.
  • the elastic member 80 is installed between the body 10 and the flange portion 43 of the piston 40 .
  • the elastic member 80 is a spring that is compressed when the piston 40 moves forward, and provides an elastic force in the backward direction of the piston 40 when the supply of current to the first coil 31 is cut off.
  • the nozzle unit opening/closing valve 50 is provided to open and close a communication hole between the nozzle unit 23 and the drug receiving unit 22 .
  • the nozzle part opening/closing valve 50 is pushed by the hydraulic pressure applied by the drug accommodated in the drug accommodating part 22 during the forward movement of the piston 40 to open the communication hole, and elastic when the hydraulic pressure is released It is restored to shield the communication hole.
  • the ball 51 is formed to fit into the enlarged part 22b.
  • the nozzle part opening/closing valve 50 has been described as an example of a ball valve.
  • the present invention is not limited thereto, and various valves such as a duckbill valve, a plate check valve, and an electric control valve may be used as the nozzle part on/off valve 50 .
  • the forward/backward driving means repeats the supply and cut-off of current at a preset period to the first coil 31 and the second coil 32, thereby performing the forward movement and the backward movement of the moving magnetic body 90 a plurality of times. can be repeated.
  • the forward/backward driving means includes a fixed magnetic body 61 and a current supply unit (not shown).
  • the fixed magnetic body 61 is inserted and fixed in a position spaced rearward from the moving magnetic body 90 inside the body 10 .
  • the fixed magnetic material 61 is magnetized by a magnetic force generated when a current is applied to the second coil 32 to have a polarity.
  • the stationary magnetic body 61 has a polarity, the moving magnetic body 90 is pulled in a backward moving direction by electrical attraction.
  • the fixed magnetic material 61 may be formed of any one of a ferromagnetic material, a quasi-ferromagnetic material, and a permanent magnet, or a combination of two or more.
  • the current supply unit (not shown) supplies current only to the first coil 31 and blocks the current to the second coil 32 when the piston 40 moves forward, and when the piston 40 moves backward A current is cut off to the first coil 31 and a current is supplied to the second coil 32 .
  • the current supply unit includes a capacitor (not shown) connected to the first coil 31 to store current supplied from an external power supply source, and a capacitor (not shown) connected to the second coil 32 to store the external power. and a DC power supply unit (not shown) for supplying the current supplied from the supply source to the second coil.
  • the capacitor (not shown) supplies and discharges the stored current to the first coil 31 when the moving magnetic body 90 moves forward, and when the moving magnetic body 90 moves backward, the first coil 31 It stores and stores electricity without supplying current to it. Accordingly, since the electric energy applied during the forward movement of the moving magnetic body 90 is greater than the electric energy applied during the backward movement, the forward speed may be increased.
  • Figure 2 is a view showing the forward movement state of the piston of the needleless syringe according to the first embodiment of the present invention.
  • the forward/backward driving means applies a current to the first coil 31 and cuts off the current supply to the second coil 32 .
  • the current stored in the capacitor (not shown) is supplied to the first coil 31 .
  • the moving magnetic body 90 moves forward by the magnetic force generated by the first coil 31 .
  • the moving magnetic body 90 moves forward more than a predetermined distance, the moving magnetic body 90 collides with the piston 40 .
  • the piston 40 moves forward by the impact force applied while the moving magnetic body 90 collides.
  • the impact force may be differently adjusted according to the mass, movement distance, and magnetic force of the moving magnetic body 90 .
  • the magnetic force may be adjusted according to a voltage applied to the first coil 31 . By changing the magnetic force, it is possible to control the amount of drug injection at one time.
  • the piston 40 since the piston 40 moves forward by the impact force, it can move forward at a higher speed than when the piston 40 and the magnetic moving body 90 move forward integrally. Accordingly, the electrical energy required to move the piston 40 forward can be further reduced.
  • the piston 40 may move forward only until the flange portion 43 is caught by the length adjustment blocker 72 .
  • the nozzle opening/closing valve 50 is opened by hydraulic pressure.
  • the drug in the drug receiving unit 22 may be injected forward through the nozzle unit 23 .
  • the piston 40 can only move forward until the flange part 43 is caught by the length adjustment blocker 72 , so that the piston 40 moves forward. Movement distance is limited.
  • the piston 40 moves forward.
  • distance is adjustable. By adjusting the forward movement distance of the piston 40, it is possible to control the amount of drug injected at one time.
  • the one-time drug injection amount can be adjusted according to the magnitude of the voltage applied to the first coil 31 and the forward movement distance of the piston 40 .
  • the current supply unit supplies current to the first coil 31 for a first preset time, and then cuts off the current when the first preset time elapses.
  • the first set time will be described as an example of about 5 ms.
  • the forward/backward driving means cuts off the supply of current to the first coil 31 and supplies current to the second coil 32 to move the piston 40 backward. .
  • FIG 3 is a view showing a backward movement state of the piston of the needleless syringe according to the first embodiment of the present invention.
  • the fixed magnetic body 61 is magnetized while having a polarity by a magnetic force.
  • the moving magnetic body 90 since the moving magnetic body 90 is affected by the magnetic force of the second coil 31 , it has the same polarity as that of the stationary magnetic body 61 .
  • the moving magnetic body 90 moves backward by the pulling force of the stationary magnetic body 61 .
  • the piston 40 may move backward to the original position by the elastic restoring force of the elastic member 80 .
  • the drug when the pressure in the drug accommodating part 22 is lowered, the drug may be filled in the drug accommodating part 22 from the drug filling machine 25 through the drug supply hole 22c. That is, when the piston 40 moves backward, the drug may be automatically filled.
  • the current supply unit supplies the second coil 32 with a current for a preset second set time, and then cuts off the current when the second set time elapses.
  • the second set time will be described as an example of about 20 ms.
  • the magnetic force generated by the second coil 32 is greater than the magnetic force generated by the first coil 31 . set small. Therefore, since a weaker magnetic force is generated around the second coil 32 , the time for which current is applied to move the piston 40 backward is longer than the time for which the current is applied to the first coil 31 . is set
  • the time applied to the second coil 32 may be increased or decreased according to the number of repeated injections per second of the drug. For example, when the number of repeated injections per second is increased to 50 to 100 Hz or more, the time applied to the second coil 32 may be set shorter.
  • the current supply unit cuts off the supply of current to the second coil 32 and supplies current to the first coil 31 to move the magnetic body 90 forward again. make it
  • the forward movement and the backward movement of the piston 40 may be repeated.
  • the piston 40 and the moving magnetic body 90 may move forward at a higher speed than when the piston 40 and the moving magnetic body 90 move forward integrally. Accordingly, the electrical energy required to move the piston 40 forward can be further reduced.
  • Figure 6 is a cross-sectional view showing a needle-free syringe according to the second embodiment of the present invention.
  • the needleless syringe 200 according to the second embodiment of the present invention further includes a cooling chamber 210 for cooling the heat generated from the solenoid coil 30 through a cooling fluid. Since it is different from the first embodiment, and the rest of the configurations and actions are similar, the description of the similar configurations will be omitted below and the different configurations will be mainly described.
  • the cooling chamber 210 is detachably coupled to the outside of the body 10 .
  • the cooling chamber 210 includes a first cooling chamber 211 installed to surround the first coil 31 on the outer peripheral surface of the body 10 , and the second coil 32 on the outer peripheral surface of the body 10 . ) and a second cooling chamber 212 installed to surround it.
  • a first cooling fluid supply pipe 211a and a first cooling fluid discharge pipe 211b are coupled to the first cooling chamber 211 .
  • the first cooling fluid supply pipe 211a is a flow path for supplying a cooling fluid from the outside to the first cooling chamber 211 .
  • the first cooling fluid discharge pipe 211b is a flow path for discharging the cooling fluid of the first cooling chamber 211 to the outside.
  • An opening/closing valve (not shown) may be provided in the first cooling fluid supply pipe 211a and the first cooling fluid discharge pipe 211b, respectively.
  • a second cooling fluid supply pipe 212a and a second cooling fluid discharge pipe 212b are coupled to the second cooling chamber 212 .
  • the second cooling fluid supply pipe 212a is a flow path for supplying a cooling fluid from the outside to the second cooling chamber 212 .
  • the second cooling fluid discharge pipe 212b is a flow path for discharging the cooling fluid of the second cooling chamber 212 to the outside.
  • An opening/closing valve (not shown) may be provided in the second cooling fluid supply pipe 212a and the second cooling fluid discharge pipe 212b, respectively.
  • cooling chambers 210 In this embodiment, it has been described as an example that two cooling chambers 210 are provided, but the present invention is not limited thereto, and one cooling chamber 210 includes the first coil 31 and the second coil 32 . ) It is of course also possible to be provided to surround all.
  • a cooling fluid is used to cool the solenoid coil 30, and the cooling fluid is described as an example that water or air can be used, but it is not limited thereto, and a conduction cooling method is used. Of course it is also possible to
  • the needleless syringe 200 according to the second embodiment of the present invention configured as described above is provided with the cooling chamber 210 for cooling the solenoid coil 30, thereby dissipating the heat of the solenoid coil 30. Since it can be absorbed and maintained at a constant temperature, it is possible to prevent the magnetic force from being weakened by the heat generated by the solenoid coil 30 .
  • Figure 7 is a view showing the forward movement state of the piston of the needleless syringe according to the third embodiment of the present invention.
  • 8 is a view showing a backward movement state of the piston of the needleless syringe according to the third embodiment of the present invention.
  • the needleless syringe 300 according to the third embodiment of the present invention, the recoil offsetting unit 310 to offset the recoil generated during the forward or backward movement of the piston 40 is further added. Since the inclusion is different from the first and second embodiments, and the rest of the configurations and actions are similar, the description of the similar configurations will be omitted and the different configurations will be mainly described.
  • the recoil canceling unit 310 is provided to form a symmetry with the moving magnetic body 90 about the stationary magnetic body 32 .
  • the recoil canceling unit 310 includes a recoil canceling coil 311 , a moving magnetic material 312 for recoil canceling and a recoil canceling current supply unit (not shown).
  • the recoil offset coil 311 is wound at a position spaced apart from the solenoid coil 30 by a predetermined distance rearward from the solenoid coil 30 on the outer circumferential surface of the body 10 .
  • the length of the recoil offsetting coil 311 will be described as the same as the length of the first coil 31 .
  • the motion magnetic body 312 for offsetting the recoil is a magnetic body inserted rearwardly spaced apart from the piston 40 by a predetermined distance in the inside of the body 10 .
  • the moving magnetic body 312 for offsetting the recoil is provided to form a symmetry with the moving magnetic body 90 around the stationary magnetic body 32 .
  • the recoil offset motion magnetic material 312 may be made of any one of a ferromagnetic material, a quasi-ferromagnetic material, and a permanent magnet, or a combination of two or more.
  • the moving magnetic body 312 for the recoil cancellation will be described as an example of the same size and material as the moving magnetic body 90 .
  • the recoil canceling current supply unit (not shown) supplies a current in a direction different from the current direction applied to the first coil 31 to the recoil canceling coil 311, to the first coil 31
  • the direction of the magnetic force generated by the magnetic force and the direction of the magnetic force generated by the recoil canceling coil 311 are opposite to each other.
  • the moving magnetic body 90 moves forward by the magnetic force generated by the first coil 31 .
  • the moving magnetic body 90 moves forward more than a predetermined distance, the moving magnetic body 90 collides with the piston 40 .
  • the piston 40 moves forward by the impact force applied while the moving magnetic body 90 collides.
  • the magnetic force generated by the recoil cancellation coil 311 moves the magnetic body 312 for recoil cancellation backward.
  • the moving magnetic body 90 and the moving magnetic body 312 for counteracting the recoil move in opposite directions.
  • the recoil generated backward in the needleless syringe 300 during the forward movement of the piston 40 may be offset from each other by the recoil generated forward during the backward movement of the recoil offsetting motion magnetic body 312 .
  • the moving magnetic body 90 since the moving magnetic body 90 is affected by the magnetic force of the second coil 31 , it has the same polarity as that of the stationary magnetic body 61 .
  • the moving magnetic body 90 moves backward by the pulling force of the stationary magnetic body 61 .
  • the piston 40 may move backward to the original position by the elastic restoring force of the elastic member 80 .
  • the magnetic force generated by the recoil cancellation coil 311 moves the magnetic body 312 for recoil cancellation forward.
  • the moving magnetic body 90 and the moving magnetic body 312 for counteracting the recoil move in opposite directions.
  • the recoil generated forward in the needleless syringe 300 during the backward movement of the piston 40 may be offset from each other by the recoil generated backward during the forward movement of the recoil offsetting motion magnetic body 312 .
  • the solenoid coil 30 has been described as including two first and second coils 31 and 32 as an example, but the present invention is not limited thereto, and the solenoid coil 30 includes the first and second coils 31 and 32 .
  • the solenoid coil 30 includes the first and second coils 31 and 32 .
  • Figure 9 is a view showing the forward movement state of the piston of the needleless syringe according to the fourth embodiment of the present invention.
  • 10 is a view showing a backward movement state of the piston of the needleless syringe according to the fourth embodiment of the present invention.
  • the solenoid coil 30 includes two first and second coils 31 and 32, but the The body 10 is different from the first embodiment in that the inner circumferential surface of the portion on which the second coil 32 is wound is formed as an empty space S without inserting a separate magnetic material, and the rest of the configuration and operation are similar. Therefore, it will be described in detail focusing on different configurations.
  • the forward/backward driving means applies a current to the first coil 31 and cuts off the current supply to the second coil 32 .
  • the moving magnetic body 90 moves forward by the magnetic force generated by the first coil 31 .
  • the moving magnetic body 90 moves forward more than a predetermined distance, the moving magnetic body 90 collides with the piston 40 .
  • the piston 40 moves forward by the impact force applied while the moving magnetic body 90 collides.
  • the piston 40 moves forward, the piston 40 presses the drug in the drug accommodating part 22, and the nozzle opening/closing valve 50 is opened by the hydraulic pressure of the drug.
  • the opening/closing valve 50 of the nozzle unit is opened, the drug in the drug receiving unit 22 may be injected forward through the nozzle unit 23 .
  • the forward/backward driving means cuts off current supply to the first coil 31 and supplies current to the second coil 32 .
  • the magnetic body 90 moves backward by the magnetic force generated in the space S.
  • the piston 40 may move backward to the original position by the elastic restoring force of the elastic member 80 .
  • the current supply unit may move the piston 40 forward or backward by repeating alternately supplying or blocking current to the first coil 31 and the second coil 32 .
  • Figure 11 is a view showing the forward movement state of the piston of the needleless syringe according to the fifth embodiment of the present invention.
  • 12 is a view showing the backward movement state of the piston of the needleless syringe according to the fifth embodiment of the present invention.
  • the needleless syringe 500 according to the fifth embodiment of the present invention is provided with only one solenoid coil 30, before and after repeating the forward and backward movement of the piston 40
  • the jin drive means includes a current supply unit (not shown) that moves the piston 40 forward by repeating supply and blocking of current at a preset period to the solenoid coil 30, and a current of the current supply unit (not shown)
  • the piston 40 includes an elastic member for imparting an elastic force in the backward direction when the supply is cut off, and the rest of the configuration is similar, and thus the different points will be described in detail.
  • the elastic member includes a first elastic member 510 installed between the body 10 and the rear end flange portion 41 of the piston 40 , and an intermediate flange portion 43 between the cylinder 20 and the piston 40 . ) and a second elastic member 520 installed between.
  • the first and second elastic members 510 and 520 are compressed when a current is supplied to the solenoid coil 30 and the piston 40 moves forward, and when the current supply to the solenoid coil 30 is cut off, the
  • the piston 40 is a spring that provides an elastic force in the backward direction.
  • the first direction is set to a direction in which the magnetic force is generated in the forward direction of the piston 40 around the solenoid coil 30 .
  • the moving magnetic body 90 moves forward by the magnetic force generated by the solenoid coil 30 .
  • the moving magnetic body 90 moves forward more than a predetermined distance, the moving magnetic body 90 collides with the piston 40 .
  • the piston 40 moves forward by the impact force applied while the moving magnetic body 90 collides.
  • the piston 40 may move backward to the original position by the elastic restoring force of the elastic members 510 and 520 .
  • FIG. 13 is a graph showing an example of the current supply waveform applied to the solenoid coil of the needleless syringe according to the fifth embodiment of the present invention.
  • the current supply unit (not shown) applies a voltage of about 100V to the solenoid coil 30 for 10 to 50 ms when the piston 40 moves forward, and the piston 40 moves backward. A voltage is cut off in the solenoid coil 30 .
  • the time for which the voltage is cut off to the solenoid coil 30 is set to be the same as the time for which the voltage is applied to the solenoid coil 30 , for example.
  • the amount of time or voltage applied to the solenoid coil 30 can be set in various ways in consideration of the amount of the drug.
  • Figure 14 is a graph showing another example of the current supply waveform applied to the solenoid coil of the needleless syringe according to the fifth embodiment of the present invention.
  • the current supply unit (not shown) repeatedly switches the direction of the current applied to the solenoid coil 30 at a preset period to periodically change the direction of the magnetic force generated in the solenoid coil 30 . can be converted to
  • the current supply unit (not shown) applies a voltage of about 100 V to the solenoid coil 30 when the moving magnetic body 90 is moved forward, and when the moving magnetic body 90 is moved backward, the solenoid coil 30 is about An example of applying a voltage of -100V will be described.
  • the current supply unit stores the current supplied from the external power supply source, and supplies the stored current to the solenoid coil 30 when the piston 40 moves forward
  • the piston A capacitor (not shown) that blocks the supply of current to the solenoid coil 30 during the backward movement of 40 and the current supplied from the external power supply source when the piston 40 moves backward is supplied to the solenoid coil 30 It is also possible to include a DC power supply.
  • the current supply unit (not shown) repeatedly switches the direction of the current applied to the solenoid coil 30 at a preset period, but when the piston 40 moves forward, the current stored in the capacitor (not shown) is supplied, and when the piston 40 moves backward, current is supplied from the DC power supply unit to increase the moving speed during the forward movement of the piston 40 .
  • Figure 15 is a cross-sectional view showing a needle-free syringe according to the sixth embodiment of the present invention.
  • the needleless syringe 600 according to the sixth embodiment of the present invention further includes a cooling chamber 610 for cooling the heat generated in the solenoid coil 30 through a cooling fluid. Since it is different from the fifth embodiment and the rest of the configurations and operations are similar, the description of the similar configurations will be omitted and the different configurations will be mainly described below.
  • the cooling chamber 610 is detachably coupled to the outside of the body 10 .
  • the cooling chamber 610 is installed to surround the solenoid coil 30 on the outer circumferential surface of the body 10 .
  • a cooling fluid supply pipe 611 and a cooling fluid discharge pipe 612 are coupled to the cooling chamber 610 .
  • the cooling fluid supply pipe 611 is a flow path for supplying a cooling fluid from the outside to the cooling chamber 610 .
  • the cooling fluid discharge pipe 612 is a flow path for discharging the cooling fluid of the cooling chamber 610 to the outside.
  • An on/off valve (not shown) may be provided in each of the cooling fluid supply pipe 611 and the cooling fluid discharge pipe 612 .
  • a cooling fluid is used to cool the solenoid coil 30, and the cooling fluid is described as an example that water or air can be used, but it is not limited thereto, and a conduction cooling method is used. Of course it is also possible to
  • the needleless syringe 600 according to the sixth embodiment of the present invention configured as described above is provided with the cooling chamber 610 for cooling the solenoid coil 30, thereby dissipating the heat of the solenoid coil 30. Since it can be absorbed and maintained at a constant temperature, it is possible to prevent the magnetic force from being weakened by the heat generated by the solenoid coil 30 .
  • Figure 17 is a view showing the forward movement state of the piston of the needleless syringe according to the seventh embodiment of the present invention.
  • 18 is a view showing the backward movement state of the piston of the needleless syringe according to the seventh embodiment of the present invention.
  • the needleless syringe 700 includes one solenoid coil 30, and recoil generated when the piston 40 moves forward or backward. It is different from the fifth embodiment to further include a recoil canceling unit 710 to offset the, and since the rest of the configuration and action are similar, the description of the similar configuration will be omitted and the description will be focused on a different configuration.
  • the recoil canceling unit 710 includes a recoil canceling coil 711 , a moving magnetic body 712 for recoil canceling and a recoil canceling current supply unit (not shown).
  • the recoil offset coil 711 is wound at a position spaced apart from the solenoid coil 30 by a predetermined distance backward from the solenoid coil 30 on the outer circumferential surface of the body 10 .
  • the length of the recoil offsetting coil 711 will be described as the same as the length of the solenoid coil 30 .
  • the moving magnetic body 712 for offsetting the recoil is a magnetic body inserted rearwardly spaced apart from the moving magnetic body 90 by a predetermined distance in the inside of the body 10 .
  • the moving magnetic body 712 for offsetting the recoil may be formed to correspond to the size of the moving magnetic body 90 .
  • the recoil offset motion magnetic material 712 may be made of any one of a ferromagnetic material, a quasi-ferromagnetic material, a permanent magnet, or a combination of two or more.
  • the moving magnetic body 712 for the recoil cancellation will be described as an example of the same size and material as the moving magnetic body 90 .
  • the recoil offset current supply unit (not shown) supplies a current in a direction different from the current direction applied to the solenoid coil 30 to the recoil offset coil 711, generated by the solenoid coil 30
  • the direction of the magnetic force and the direction of the magnetic force generated by the recoil cancellation coil 711 are made to be opposite to each other.
  • the moving magnetic body 90 moves forward by the magnetic force generated by the solenoid coil 30 .
  • the moving magnetic body 90 moves forward more than a predetermined distance, the moving magnetic body 90 collides with the piston 40 .
  • the piston 40 moves forward by the impact force applied while the moving magnetic body 90 collides.
  • the magnetic force generated by the recoil cancellation coil 711 moves the magnetic body 712 for recoil cancellation backward.
  • the moving magnetic body 90 and the moving magnetic body 712 for offsetting the recoil are moved in opposite directions.
  • the recoil generated backward in the needleless syringe 700 during the forward movement of the piston 40 may be offset from each other by the recoil generated in the forward direction during the backward movement of the recoil canceling motion magnetic body 712 .
  • the recoil cancellation coil 711 includes the current direction applied to the solenoid coil 30 and A current in the opposite direction is applied.
  • the magnetic force generated by the solenoid coil 30 moves the moving magnetic body 90 backward.
  • the piston 40 may move backward to the original position by the elastic restoring force of the elastic members 510 and 520 .
  • the magnetic force generated by the recoil cancellation coil 711 advances the moving magnetic body 712 for the recoil cancellation.
  • the piston 40 and the moving magnetic body 712 for offsetting the recoil move in opposite directions.
  • the recoil generated forward in the needleless syringe 700 during the backward movement of the piston 40 may be offset from each other by the recoil generated backward during the forward movement of the recoil offsetting motion magnetic body 712 .
  • Figure 18 is a cross-sectional view showing a needle-free syringe according to the eighth embodiment of the present invention.
  • the needleless syringe 800 according to the eighth embodiment of the present invention is different from the above embodiments in that a piston cover 810 is provided between the cylinder 20 and the piston 40 , , and other configurations and actions are similar to those of the above embodiments, so only different configurations will be described.
  • the piston cover 810 is fixedly installed on the cylinder 20 .
  • the piston cover 810 is provided inside the cylinder 20 and is disposed to cover the end of the piston 40 .
  • the piston cover 810 may be fitted and coupled to the inside of the cylinder 20 , and may be fixed to the inner circumferential surface of the cylinder 20 by bonding or coupling.
  • the piston cover 810 is formed of a stretchable material so as to be stretched forward by the piston 40 when the piston 40 moves forward and to be restored when the piston 40 moves backward.
  • the piston cover 810 will be described as an example of a rubber film.
  • the piston cover 810 may prevent the drug from being directly attached to the end of the piston 40 .
  • piston cover 810 is provided in the cylinder 20 , the piston cover 810 is also replaceable when the cylinder 20 is replaced.
  • a needleless syringe capable of injecting multiple times instead of once in a single treatment on a wider range of skin such as the face in the field of skin care and the like.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

La présente invention permet à un corps magnétique mobile d'entrer en collision avec un piston de façon à déplacer le piston vers l'avant, et peut ainsi injecter un médicament à une vitesse supérieure en utilisant moins d'énergie. Une seringue sans aiguille selon la présente invention peut amener le piston servant à mettre sous pression et injecter un médicament à effectuer un mouvement de va-et-vient répété vers l'avant et vers l'arrière de façon à permettre l'injection d'un médicament prédéterminé de manière répétée à une grande vitesse et, de ce fait, dans les domaines des soins de la peau et similaires, permet de multiples injections, plutôt qu'une seule injection, au cours d'une seule procédure dans des zones plus étendues de la peau telles que le visage. De plus, un utilisateur peut injecter le médicament prédéterminé de manière automatique et répétée à une grande vitesse sans nécessiter de chargement séparé. En outre, la seringue sans aiguille selon la présente invention comprend une partie de compensation de rebond pour compenser un rebond généré lorsque le piston se déplace vers l'avant et vers l'arrière et, de ce fait, présente une commodité d'utilisation davantage améliorée.
PCT/KR2020/016908 2019-12-05 2020-11-26 Seringue sans aiguille WO2021112485A1 (fr)

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