CN113613695A - Nozzle assembly, injector body and needleless injector comprising same - Google Patents
Nozzle assembly, injector body and needleless injector comprising same Download PDFInfo
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- CN113613695A CN113613695A CN201980093518.5A CN201980093518A CN113613695A CN 113613695 A CN113613695 A CN 113613695A CN 201980093518 A CN201980093518 A CN 201980093518A CN 113613695 A CN113613695 A CN 113613695A
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- space
- plunger
- piston
- nozzle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
- A61D1/00—Surgical instruments for veterinary use
- A61D1/02—Trocars or cannulas for teats; Vaccination appliances
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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
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
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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
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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
- A61M5/31—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
Abstract
The present invention relates to a needleless injector. A needleless injector of one embodiment of the present invention comprises: a nozzle assembly for containing a liquid medicine therein and ejecting the liquid medicine; and a syringe body for applying pressure to the nozzle assembly to eject the liquid medicine. The nozzle assembly includes: a nozzle container having a space for containing a chemical liquid therein and having a discharge hole for discharging the chemical liquid; and a plunger for applying pressure to the liquid medicine in the nozzle container. The syringe body includes: a piston connected to the plunger; a piston elastic member for applying an elastic force to the piston in a first direction, the first direction being a direction in which the plunger applies a pressure to the liquid medicine; a loading unit configured to move the piston in a second direction opposite to the first direction to a lock position; and a locking portion for locking the piston at the locking position to stop the piston, and for releasing the locking.
Description
Technical Field
The present invention relates to a nozzle assembly, a syringe body and a needle-less syringe including the same, and more particularly, to a nozzle assembly, a syringe body and a needle-less syringe including the same, which can continuously inject a drug solution without using a needle.
Background
In the prior art, needle syringes are used for injecting drugs, i.e. medicinal liquids, into animals or humans. However, such a needle syringe has various problems as follows: cross infection of the subject, pain associated with such injection, and breakage and detachment of the needle in the body of the subject. In particular, the breakage or detachment of the needle in the body of the subject to be injected is not only detrimental to the health and safety of the subject, but also causes considerable economic problems.
To avoid the problems associated with needle-based injectors currently in use, many companies have accelerated research on needle-free injectors.
The needleless injector does not include a needle that pierces the skin of an animal or human to inject a drug solution, and injects the drug solution by instantaneous pressure.
However, some conventional needleless injectors are unsanitary and risk infection because the liquid medicine to be injected into a subject is provided integrally with the device part. Alternatively, some products of the manual needleless syringe can be filled only once and can be injected with the liquid medicine only once, which is inconvenient for continuous injection.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a nozzle assembly, an injector body and a needleless injector comprising the injector body, which are sanitary and can reduce the infection risk.
Further, it is an object of the present invention to provide a nozzle assembly, a syringe body and a needleless syringe including the same, which can continuously inject a chemical solution.
Technical problems to be solved by the present invention are not limited to the above-mentioned, and other technical problems not mentioned may be clearly known to those skilled in the art from the following description.
Means for solving the problems
The invention provides a needleless injector. According to one embodiment, a needleless injector comprises: a nozzle assembly for containing a liquid medicine therein and ejecting the liquid medicine; and a syringe body for applying pressure to the nozzle assembly to eject the liquid medicine. The nozzle assembly includes: a nozzle container having a space for containing a chemical liquid therein and having a discharge hole for discharging the chemical liquid; and a plunger for applying pressure to the liquid medicine in the nozzle container. The syringe body includes: a piston connected to the plunger; a piston elastic member for applying an elastic force to the piston in a first direction, the first direction being a direction in which the plunger applies a pressure to the liquid medicine; a loading unit configured to move the piston in a second direction opposite to the first direction to a lock position; and a locking portion for locking the piston at the locking position to stop the piston, and for releasing the locking.
The nozzle assembly may be provided in a manner to be removably attachable to the syringe body.
The nozzle container may be formed with an injection hole into which the chemical solution can be injected from the outside.
The plunger may be inserted into and disengaged from the nozzle container through the injection hole.
One end of the plunger may be exposed to the outside of the nozzle container through the injection hole, and the one end of the plunger and the one end of the piston may be configured to be fixedly engageable with each other in the first direction and the second direction.
The space of the nozzle container may include: a first space adjacent to the spouting hole and communicating with the spouting hole; and a second space provided farther from the discharge hole than the first space. The diameter of the first space is set smaller than that of the second space when viewed from the first direction, and the other end of the plunger is inserted into the first space from the second space.
The plunger is formed with a chemical solution moving path that passes through a region of a side surface of the plunger and the other end of the plunger. A backflow prevention part for preventing the fluid from flowing backward from the ejection hole to the first space is provided in the first space. When the plunger is located at the lock position, the one region of the side surface is located in the second space, and when the plunger is located at a position closer to the spouting hole than the lock position, the one region of the side surface is located in the first space.
The present invention also provides a nozzle unit that contains a chemical solution therein, is attachable to and detachable from a syringe body, and discharges the chemical solution by pressure applied to the syringe body. According to an embodiment, a nozzle assembly comprises: a nozzle container having a space for containing a chemical liquid therein and having a discharge hole for discharging the chemical liquid; and a plunger for applying pressure to the liquid medicine in the nozzle container. The plunger is detachably attached to the piston of the syringe body and is moved by the movement of the piston.
The nozzle container may be formed with an injection hole into which the chemical solution can be injected from the outside.
The plunger is inserted into and removed from the nozzle container through an opposite surface of the nozzle container to a surface on which the discharge hole is formed, one end of the plunger is exposed to the outside of the nozzle container in a state where the plunger is inserted into the nozzle container, a grip portion that can be gripped by a user is provided at the one end of the plunger, and the grip portion is removed from the plunger after the plunger is inserted into the nozzle container.
The space of the nozzle container may include: a first space adjacent to the spouting hole and communicating with the spouting hole; and a second space provided farther from the discharge hole than the first space. The diameter of the first space is set smaller than that of the second space when viewed from the first direction, and the other end of the plunger is inserted into the first space from the second space.
A liquid medicine moving path is formed in the plunger, the liquid medicine moving path penetrates between a region of a side surface of the plunger and the other end of the plunger, a backflow prevention portion is provided in the first space, the backflow prevention portion is configured to prevent a fluid from flowing back into the first space from the discharge hole, the region of the side surface is located in the second space when the plunger is located at a lock position, and the region of the side surface is located in the first space when the plunger is located at a position closer to the discharge hole than the lock position.
The first space may include: an insertion space into which the plunger is inserted; and a valve space communicating with the ejection hole and closer to the ejection hole than the insertion space. A backflow prevention wall is provided between the insertion space and the valve installation space, and the backflow prevention wall is formed with a backflow prevention hole that is opened and closed by the backflow prevention portion. The backflow prevention portion includes: a valve member provided in the valve-provided space at a position corresponding to the backflow preventing hole; and a valve elastic member that applies an elastic force to the valve member in a direction from the discharge hole toward the backflow prevention hole.
The present invention also provides a syringe body to which a nozzle unit containing a chemical liquid therein is detachably attached, the syringe body being configured to discharge the chemical liquid by applying pressure to the nozzle unit. According to one embodiment, the syringe body comprises: a piston to which a plunger of the nozzle assembly is removably attachable; a piston elastic member for applying an elastic force to the piston in a first direction, the first direction being a direction in which the plunger applies a pressure to the liquid medicine; a loading unit configured to move the piston in a second direction opposite to the first direction to a lock position; a locking portion for locking the piston at the locking position to stop the piston, and for releasing the locking; and a housing in which a space for disposing the piston is formed.
The nozzle assembly includes a housing, a piston, a nozzle assembly coupling hole formed in a side surface of the housing, the piston having one end, the nozzle assembly coupling hole being formed by opening a region of the housing corresponding to the one end of the piston from a surface of the housing desired to the one end of the piston, and an opening/closing member provided in the nozzle assembly coupling hole to open and close the nozzle assembly coupling hole.
Effects of the invention
The nozzle assembly, syringe body and needleless syringe including the same of the embodiments of the present invention are hygienic and can reduce the risk of infection.
In addition, the nozzle assembly, the syringe body and the needleless syringe including the same according to the embodiments of the present invention can continuously inject the liquid medicine.
Drawings
Fig. 1 is a perspective view of a needleless injector showing one embodiment of the present invention.
Fig. 2 is a side sectional view showing the needle free injector of fig. 1 in a ready to operate condition with the nozzle assembly engaged with the injector body.
Fig. 3 is a side sectional view showing the area of the needleless injector of fig. 2 near the ejection orifice.
Fig. 4 is a side sectional view showing the area of the needleless injector of fig. 2 near the other end of the piston.
Fig. 5 is a side sectional view showing how the piston of the needleless injector of fig. 1 moves to a locked position.
Fig. 6 is a side sectional view showing the area near the ejection orifice of the needleless injector of fig. 5.
Fig. 7 is a side sectional view showing the manner in which the plunger of the needleless injector of fig. 1 is in a locked position.
Fig. 8 is a side sectional view showing the area near the ejection orifice of the needleless injector of fig. 7.
Fig. 9 is a side sectional view showing the area of the needleless injector of fig. 7 near the other end of the piston.
Fig. 10 is a side sectional view showing the needleless syringe of fig. 1 in a state in which the drug solution is discharged.
Fig. 11 is a side sectional view showing a region close to the discharge hole in a state where the needle-less syringe of fig. 1 is discharging the drug solution.
Fig. 12 is a side sectional view showing the appearance of the needleless injector of fig. 10.
Fig. 13 is a side sectional view showing the condition in which the chemical liquid is discharged and the force applied to the handle is weakened in the needleless syringe of fig. 1.
Fig. 14 to 16 are diagrams sequentially showing an example of a method of injecting a chemical solution into the nozzle unit of fig. 1.
Detailed Description
Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention may be modified in various ways, and it should not be construed that the scope of the present invention is limited by the embodiments described below. This example is provided to more fully illustrate the present invention to those skilled in the art. Accordingly, the shapes of elements in the drawings are exaggerated to help better explain.
Fig. 1 is a perspective view of a needleless injector 10 illustrating one embodiment of the present invention. Fig. 2 is a side sectional view showing the needle free injector 10 of fig. 1 in a ready to operate state after the nozzle assembly 1000 has been engaged with the injector body 2000. Fig. 3 is a side sectional view showing the area of the needleless injector 10 of fig. 2 near the ejection orifice 1120. Fig. 4 is a side sectional view showing the area of the needle free injector 10 of fig. 2 near the other end of the piston 2100. Referring to fig. 1-4, needleless injector 10 includes a nozzle assembly 1000 and an injector body 2000.
The nozzle assembly 1000 is used to contain a medical fluid therein. The nozzle assembly 1000 is provided to discharge the medical fluid contained therein by pressure applied by the syringe body 2000. According to an embodiment, the nozzle assembly 1000 includes a nozzle container 1100, a plunger 1200, and a backflow prevention part 1300. The nozzle assembly 1000 is provided to be attachable to and detachable from the syringe body 2000.
The nozzle container 1100 is provided with a space 1110 for containing the liquid medicine therein. The nozzle container 1100 is formed with a discharge hole 1120 through which the chemical liquid accommodated therein is discharged. The discharge hole 1120 is exposed to the outside of the syringe body 2000 of the nozzle container 1100, and is formed in a region facing a body portion into which the chemical solution is to be injected. For example, the spouting holes 1120 may be formed at a distal end surface in a direction opposite to a direction of the nozzle container 1100 toward the injector body 2000.
The nozzle container 1100 is formed with an injection hole 1130 into which a chemical solution can be injected from the outside. According to an embodiment, the injection hole 1130 may be formed at a surface of the nozzle container 1100 facing the syringe body 2000 in a state where the nozzle container 1100 is coupled with the syringe body 2000. The injection hole 1130 may be formed on a surface of the nozzle container 1100 opposite to a surface on which the discharge hole 1120 is formed.
According to an embodiment, the space 1110 of the nozzle container 1100 includes a first space 1111 and a second space 1112.
The first space 1111 is a region of the space 1110 of the nozzle container 1100 near the ejection hole 1120 and communicating with the ejection hole 1120. According to an embodiment, the first space 1111 includes an insertion space 1111a and a valving space 1111 b.
The insertion space 1111a is into which the plunger 1200 is inserted. The valve space 1111b is directly connected to the discharge hole 1120. The valve space 1111b is provided at a position closer to the ejection hole 1120 than the insertion space 1111 a. A backflow prevention wall 1310 is provided between the insertion space 1111a and the valving space 1111 b. A backflow prevention hole 1311 is formed in the backflow prevention wall 1310. When the chemical liquid is discharged, the chemical liquid inserted into the space 1111a flows into the valve-provided space 1111b through the backflow preventing hole 1311.
The second space 1112 is a region of the space 1110 of the nozzle container 1100 which is located further from the discharge hole 1120 than the first space 1111.
The diameter of the first space 1111 is set smaller than the diameter of the second space 1112 as viewed from the first direction. According to an embodiment, the first direction is a direction from the injector body 2000 towards the nozzle assembly 1000.
According to an embodiment, an O-ring (O-ring)1140 may be provided in a region adjacent to the second space 1112 in the first space 1111. O-ring 1140 is positioned with its inner face abutting the side of plunger 1200. The O-ring 1140 is made of a waterproof material having elasticity. By providing the O-ring 1140, the chemical liquid can be prevented from moving through the space between the side surface of the plunger 1200 and the inner surface of the first space 1111.
The plunger 1200 applies pressure to the chemical liquid in the nozzle container 1100. The plunger 1200 may be inserted into or detached from the nozzle container 1100 through a surface thereof opposite to a surface thereof where the spouting holes 1120 are formed. For example, the plunger 1200 may be inserted into the nozzle container 1100 through the injection hole 1130 or detached from the nozzle container 1100.
The plunger 1200 may be provided as a piston 2100 detachably attached to the syringe body 2000. The plunger 1200 can be moved by the movement of the piston 2100. In a state where the plunger 1200 is inserted into the nozzle container 1100, one end of the plunger 1200 may be exposed to the outside of the nozzle container 1100 through the injection hole 1130. One end of the plunger 1200 and one end of the piston 2100 are fixedly engageable with each other in the first direction and the second direction. The second direction is a direction opposite to the first direction.
The other end 1220 of the plunger 1200 is inserted from the second space 1112 toward the first space 1111 in the first direction and is disengaged from the first space 1111 toward the second space 1112 in the second direction.
According to an embodiment, a medical fluid moving path 1230 is formed at the plunger 1200. The medical fluid moving path 1230 is formed to penetrate between a region of the side surface of the plunger 1200 and the other end 1220 of the plunger 1200. When the plunger 1200 is located at the lock position, the one region of the side surface of the plunger 1200 is located in the second space 1112, and when the plunger 1200 is located closer to the ejection hole 1120 than the lock position, the one region of the side surface of the plunger 1200 is located in the first space 1111.
The first space 1111 is provided with a backflow prevention unit 1300. The backflow prevention unit 1300 prevents the liquid chemical, the external air, and the like from flowing back to the first space 1111 through the discharge hole 1120. According to an embodiment, the backflow prevention unit 1300 can prevent the backflow by opening and closing the backflow prevention hole 1311. For example, the backflow prevention unit 1300 includes a valve member 1320 and a valve elastic member 1330.
The valve member 1320 is provided so as to correspond to the backflow preventing hole 1311 in which the valve space 1111b is provided. The valve member 1320 moves by the elastic force of the valve elastic member 1330 and the flow of the chemical solution generated by the movement of the plunger 1200, and is brought into close contact with the backflow prevention wall 1310 or separated from the backflow prevention wall 1310, thereby opening and closing the backflow prevention hole 1311.
The valve elastic member 1330 applies an elastic force to the valve member 1320 in a direction from the ejection hole 1120 toward the backflow prevention hole 1311. The valve elastic member 1330 may be provided as a coil spring having a diameter decreasing from the ejection hole 1120 toward the valve member 1320 in order to form a gap in which the liquid medicine can be discharged to the ejection hole 1120 in a compressed state.
The syringe body 2000 applies pressure to the nozzle assembly 1000 to discharge the liquid medicine in the nozzle assembly 1000. According to one embodiment, the nozzle assembly 1000 containing the chemical liquid therein is attached to and detached from the syringe body 2000. The syringe body 2000 includes a piston 2100, a piston elastic member 2200, a loading part 2300, a locking part 2400, and a housing 2500.
The piston 2100 is connected to the plunger 1200. According to an embodiment, the plunger 1200 is removably coupled to the piston 2100. An inner ball receiving groove 2130 is formed in a side surface of the piston 2100. Medial ball receiving groove 2130 is configured such that when piston 2100 is in the locked position, locking ball 2420 moves medially to be received in medial ball receiving groove 2130.
The piston elastic member 2200 serves to apply an elastic force to the piston in a first direction in which the plunger 1200 applies a pressure to the liquid medicine in the nozzle container 1100. The piston elastic member 2200 may be configured as a coil spring.
The loading part 2300 moves the piston 2100 to a Locking (Locking) position in the second direction. According to an embodiment, the loading part 2300 includes a handle 2310 and a catching protrusion 2320.
The handle 2310 is configured to: the handle 2310 is rotatable between a position where the other end of the handle 2310 contacts the housing 2500 and a position where the other end of the handle 2310 is spaced apart from the housing 2500, with the one end extending from the side surface of the housing 2500 and connected to the housing 2500 as a center.
According to an embodiment, on the side of the handle 2310 facing the housing 2500, a catch protrusion 2320 is provided extending towards the housing. The catching protrusion 2320 is provided as: the other end of the catching protrusion 2320 can rotate on a plane parallel to the rotation plane of the handle 2310 centering on one end connected to the side surface of the handle 2310.
According to an embodiment, an area corresponding to the handle 2310 in the side of the housing 2500 is provided to be open. In an area corresponding to the above-mentioned area of the handle 2310 in the side of the piston 2100, a catching member 2110 for catching the other end of the protrusion 2320 in the second direction is provided.
Accordingly, if the other end of the handle 2310 is moved from a position away from the housing 2500 to a position close to the housing 2500, the other end of the catching protrusion 2320 is caught by the catching member 2110, thereby applying a force to the catching member 2110 in the second direction.
A catching protrusion elastic member may be provided at the loading part 2300, and the catching protrusion elastic member applies an elastic force to the catching protrusion 2320 in a direction to make the other end of the catching protrusion 2320 be distant from the handle 2310. Therefore, in order to position the piston 2100 at the locking position, the handle 2310 is moved again to a position away from the housing 2500 by the elastic force of the catching protrusion elastic member after being moved toward the housing 2500 by the user.
The locking portion 2400 is used to lock the piston 2100 to be stopped in the locking position and to unlock the locking. According to an embodiment, the locking part 2400 includes a button 2410, a locking ball 2420, a ball receiving member 2430, and a ball receiving member elastic member 2440.
The button 2410 is provided on the opposite face of the housing 2500 to the face facing the end of the piston 2100 to which the plunger 1200 is connected.
The ball receiving member 2430 is moved in a first direction by the button 2410. An outer ball receiving groove 2431 is formed in the ball receiving part 2430. The outer ball receiving groove 2431 is provided with a space to allow the locking ball 2420 to move outward when the position of the ball receiving part 2430 is located at a position corresponding to the locking ball 2420.
The ball receiving member elastic member 2440 applies an elastic force to the ball receiving member 2430 in the second direction. The ball receiving member elastic member 2440 may be configured as a coil spring.
The housing 2500 has a space inside for disposing the piston 2100. According to one embodiment, the face of the housing 2500 that is intended for one end of the piston 2100 is open. A nozzle assembly coupling hole is formed at a side of the housing 2500 to allow the nozzle assembly 1000 to be inserted into the housing 2500.
The nozzle assembly coupling hole is formed by opening a region from a surface of the housing 2500, which is expected to be one end of the piston 2100, to the housing 2500, which corresponds to one end of the piston 2100.
An opening and closing part 2520 for opening and closing the nozzle block coupling hole may be provided at the nozzle block coupling hole. According to an embodiment, the opening and closing part 2520 has one end facing the second direction connected to the housing 2500 by a hinge 2521, and the opening and closing part 2520 is rotated about the one end between a position where the other end faces the first direction and a position where the other end is away from the housing, thereby opening and closing the nozzle assembly coupling hole.
Next, a method of injecting a drug solution by the needle-less injector 10 of fig. 1 will be described.
Referring to fig. 2 to 4, the nozzle assembly 1000 in a state where the chemical liquid is supplied to the space of the nozzle container 1100 is coupled to the syringe body 2000. According to an embodiment, the nozzle assembly 1000 is inserted into the housing 2500 through the nozzle assembly coupling hole such that one end of the plunger 1200 protruding toward the injection hole 1130 is coupled to one end of the piston 2100 in a state where the opening and closing member 2520 is opened, and is coupled to the syringe body 2000. At this time, the piston 2100 is unlocked. Accordingly, the plunger 1200 is inserted into the insertion space 1111a to the maximum extent. Further, lock ball 2420 is inserted into outer ball receiving groove 2431, and inner ball receiving groove 2130 is moved in the first direction from the position facing lock ball 2420.
Fig. 5 is a side sectional view showing the piston 2100 of the needle free injector 10 of fig. 1 moved to a locked position. Fig. 6 is a side sectional view showing the area of the needleless injector 10 of fig. 5 near the ejection orifice 1120. Referring to fig. 5 and 6, after the process of fig. 2 is performed, when the user applies a force to the handle 2310 to move the handle 2310 in the direction of the housing 2500, the piston 2100 is moved in the second direction to the lock position. At this time, the plunger 1200 also moves in the second direction in the same direction as the piston 2100, and the space between the backflow prevention wall 1310 inserted into the space 1111a and the other end of the piston 2100 is in a vacuum state until the hole formed in the chemical solution moving path 1230 on the piston 2100 side is exposed to the second space 1112. The user can apply a force to the handle 2310 toward the housing 2500 side by wrapping the handle 2310 and the side periphery of the housing 2500 together with the user's hand. At this time, in a state where the handle 2310 has been completely moved (moved to the maximum extent) toward the housing 2500 side, the tip of the auxiliary protrusion protruding in the vertical direction from one end of the catching protrusion 2320 protrudes outward from the region of the side surface of the housing corresponding to the auxiliary protrusion and rotates along the inclined surface of the inclined protrusion, which is inclined in the first direction as it goes toward the outward side, whereby the catching protrusion 2320 rotates and the other end of the catching protrusion 2320 is disengaged from the catching member 2110.
Fig. 7 is a side sectional view showing the manner in which the piston 2100 of the needle free injector 10 of fig. 1 is in a locked position. Fig. 8 is a side sectional view showing the area of the needleless injector 10 of fig. 7 near the ejection orifice 1120. Fig. 9 is a side sectional view showing the area of the needle free injector 10 of fig. 7 near the other end of the piston 2100. Referring to fig. 7-9, after the process of fig. 5 and 6 is completed, piston 2100 is positioned with inner ball receiving recess 2130 corresponding with lock ball 2420. Therefore, the locking ball 2420 is received in the inner ball receiving groove 2130, and the locking ball 2420 that originally received the ball receiving member 2430 moves to the inner ball receiving groove 2130, whereby the ball receiving member 2430 moves in the second direction by the elastic force of the ball receiving member elastic member 2440. Therefore, the lock ball 2420 is prevented from moving outward by the area of the ball receiving member 2430 closer to the first direction side than the outer ball receiving groove 2431, and the piston 2100 is stopped at the lock position by the lock ball 2420 received in the inner ball receiving groove 2130. In this case, the hole formed outside the plunger 1200 of the chemical solution moving path 1230 is exposed to the second space 1112, and thus the chemical solution in the second space 1112 flows into the insertion space 1111a in a vacuum state through the chemical solution moving path 1230.
Fig. 10 is a side sectional view showing the needleless syringe 10 in fig. 1 in a state in which the drug solution is discharged. Fig. 11 is a side sectional view showing a region close to the discharge hole 1120 in a state where the needle-less injector 10 of fig. 1 is discharging the chemical solution. Fig. 12 is a side sectional view showing the appearance of the needleless injector 10 of fig. 10. Referring to fig. 10 to 12, as described above, when the user presses the button 2410 with the thumb in a state of holding the needle-less injector 10 with the hand, the ball receiving part 2430 moves in the first direction to a position where the outer ball receiving groove 2431 corresponds to the locking ball 2420. Therefore, the piston 2100, which is originally locked by the movement of the locking ball 2420 received in the inner ball receiving groove 2130 to the outer ball receiving groove 2431 and the insertion of the locking ball 2420 into the inner ball receiving groove 2130, is moved in the second direction by the elastic force of the piston elastic member 2200. At this time, the plunger 1200 connected to the piston 2100 is moved in the second direction by the movement of the piston 2100, and the chemical liquid accommodated in the insertion space 1111a is discharged through the discharge hole 1120. At this time, the valve member 1320 is moved in the discharge hole direction by the chemical liquid pressure applied by the piston 2100, and the chemical liquid is transmitted to the discharge hole through a space between the valve member 1320 and the backflow preventing hole 1311.
Fig. 13 is a side sectional view showing how the medical fluid is discharged from the needleless syringe 10 of fig. 1 and the force applied to the handle 2310 is weakened. Referring to fig. 13, after the liquid medicine is discharged, if the user releases the hand that originally held the needle-less injector 10, the elastic force of the catching protrusion elastic member causes the catching protrusion 2320 to rotate and the handle 2310 to rotate in a direction away from the housing 2500, so that the needle-less injector 10 returns to the same state as in fig. 1 again, and the above-described method is repeated, thereby enabling repeated injection of a certain amount of liquid medicine. In particular, as described above, the needle-less syringe 10 according to the embodiment of the present invention can continuously inject the chemical liquid several times by a certain amount when the nozzle unit 1000 containing the chemical liquid is coupled to the syringe body 2000 once by ejecting only the chemical liquid flowing into the insertion space 1111a out of the chemical liquid contained in the nozzle container 1100 at one ejection.
Next, a method of injecting a chemical into the nozzle unit 1000 of the needle-less injector 10 according to the embodiment of the present invention will be described.
Fig. 14 to 16 are diagrams sequentially showing an example of a method of injecting a chemical solution into the nozzle assembly 1000 of fig. 1. Referring to fig. 14 to 16, a chemical liquid is injected into the empty nozzle assembly 1000 through the injection hole 1130 by using the night suction tube 30 or the like.
Then, the plunger 1200 is inserted into the nozzle assembly 1000 into which the chemical solution has been injected from the other end 1220 through the injection hole 1130.
According to an embodiment, a grip 1240 may be provided at one end of the plunger 1200. The user can easily move the plunger 1200 while holding the grip 1240. After the plunger 1200 is inserted into the nozzle container 1100, the grip 1240 is removed from the plunger 1200. A cutting region is formed in a region of the grip 1240 adjacent to the side surface of the plunger 1200, and the cutting region is set to be retracted inward along the circumferential direction of the side surface of the plunger 1200. Therefore, when the grip 1240 is removed from the plunger 1200 by applying a force to the grip 1240, the cutting region is cut, and the grip 1240 is easily removed.
As described above, the needle-less injector 10 according to the embodiment of the present invention can inject a predetermined amount of liquid medicine several times consecutively by replacing the nozzle assembly 1000 once. In addition, the needleless injector 10 of the embodiment of the present invention is hygienic and can reduce the risk of infection because the nozzle assembly 1000 containing the drug solution is replaced.
The foregoing detailed description is intended to be illustrative of the invention. The foregoing is a description of preferred embodiments of the present invention, and the present invention may be used in various other combinations, modifications, and environments. That is, variations and modifications are possible within the scope of the inventive concept disclosed in the present specification, within the scope equivalent to the disclosure described, and/or within the skill or knowledge of the art. The embodiments described are examples for explaining the best mode for carrying out the technical idea of the present invention, and various modifications may be made as required for a specific application range and a use of the present invention. Therefore, the above detailed description of the invention is not intended to limit the invention to the disclosed embodiments. In addition, the appended claims should be construed to include other embodiments as well.
Claims (15)
1. A needle-free injector is provided, which comprises a needle-free injector,
the method comprises the following steps:
a nozzle assembly for containing a liquid medicine therein and ejecting the liquid medicine, an
A syringe main body for applying pressure to the nozzle assembly to eject the liquid medicine;
the nozzle assembly includes:
a nozzle container having a space for containing a chemical liquid therein, the nozzle container having a discharge hole for discharging the chemical liquid formed therein, an
A plunger for applying pressure to the chemical liquid in the nozzle container;
the syringe body includes:
a piston connected to the plunger,
a piston elastic member for applying an elastic force to the piston in a first direction in which the plunger applies a pressure to the liquid medicine,
a loading portion that moves the piston to a locking position in a second direction that is opposite to the first direction, an
A locking portion for locking the piston at the locking position to stop the piston, and for releasing the locking.
2. The needle free injector of claim 1,
the nozzle assembly is provided in a manner to be detachably attached to the syringe body.
3. The needle free injector of claim 1,
the nozzle container is formed with an injection hole into which a chemical solution can be injected from the outside.
4. The needle free injector of claim 3,
the plunger is inserted into and disengaged from the nozzle container through the injection hole.
5. The needle free injector of claim 4,
one end of the plunger is exposed to the outside of the nozzle container through the injection hole,
one end of the plunger and one end of the piston are arranged to be fixedly engageable with each other in the first direction and the second direction.
6. The needle free injector of claim 1,
the space of the nozzle container includes: a first space adjacent to the spouting hole and communicating with the spouting hole; and a second space provided farther from the discharge hole than the first space,
a diameter of the first space is set smaller than a diameter of the second space when viewed from the first direction,
the other end of the plunger is inserted into the first space from the second space.
7. The needle free injector of claim 6,
a chemical liquid moving path is formed in the plunger, the chemical liquid moving path passing through a region of a side surface of the plunger and the other end of the plunger,
a backflow preventing part for preventing a fluid from flowing backward from the ejection hole to the first space is provided in the first space,
when the plunger is located at the lock position, the one region of the side surface is located in the second space, and when the plunger is located at a position closer to the spouting hole than the lock position, the one region of the side surface is located in the first space.
8. A nozzle assembly which contains a medical fluid therein, is attachable to and detachable from a syringe body, and discharges the medical fluid by pressure applied to the syringe body,
the nozzle assembly includes:
a nozzle container having a space for containing a chemical liquid therein and having a discharge hole for discharging the chemical liquid,
a plunger for applying pressure to the chemical liquid in the nozzle container;
the plunger is detachably attached to the piston of the syringe body and is moved by the movement of the piston.
9. The nozzle assembly of claim 8,
the nozzle container is formed with an injection hole into which a chemical solution can be injected from the outside.
10. The nozzle assembly of claim 8,
the plunger is inserted into and detached from the nozzle container through an opposite surface of the nozzle container to a surface on which the spouting hole is formed,
one end of the plunger is exposed to the outside of the nozzle container in a state where the plunger is inserted into the nozzle container,
a grip portion that can be gripped by a user is provided at the one end of the plunger,
the handle is removed from the plunger after the plunger is inserted into the nozzle container.
11. The nozzle assembly of claim 8,
the space of the nozzle container includes:
a first space adjacent to and communicating with the spouting hole, an
A second space provided farther from the discharge hole than the first space;
a diameter of the first space is set smaller than a diameter of the second space when viewed from the first direction,
the other end of the plunger is inserted into the first space from the second space.
12. The nozzle assembly of claim 9,
a chemical liquid moving path is formed in the plunger, the chemical liquid moving path passing through a region of a side surface of the plunger and the other end of the plunger,
a backflow preventing part for preventing a fluid from flowing backward from the ejection hole into the first space is provided in the first space,
when the plunger is located at a lock position, the one region of the side surface is located in the second space, and when the plunger is located at a position closer to the spouting hole than the lock position, the one region of the side surface is located in the first space.
13. The nozzle assembly of claim 12,
the first space includes:
an insertion space into which the plunger is inserted, and
a valve space communicating with the ejection hole and closer to the ejection hole than the insertion space;
a backflow prevention wall is provided between the insertion space and the valve installation space, the backflow prevention wall is formed with a backflow prevention hole opened and closed by the backflow prevention part,
the backflow prevention portion includes:
a valve member provided at a position corresponding to the backflow preventing hole of the valve space, an
And a valve elastic member that applies an elastic force to the valve member in a direction from the discharge hole toward the backflow prevention hole.
14. A syringe body to which a nozzle unit containing a chemical liquid therein is detachably attached, the syringe body pressurizing the nozzle unit to discharge the chemical liquid,
the syringe body includes:
a piston to which a plunger of the nozzle assembly is removably attachable;
a piston elastic member for applying an elastic force to the piston in a first direction, the first direction being a direction in which the plunger applies a pressure to the liquid medicine;
a loading unit configured to move the piston in a second direction opposite to the first direction to a lock position;
a locking portion for locking the piston at the locking position to stop the piston, and for releasing the locking; and
and a housing in which a space for disposing the piston is formed.
15. The syringe body of claim 14,
the face of the housing which is intended for one end of the piston is open,
a nozzle assembly coupling hole formed in a side surface of the housing so that the nozzle assembly can be inserted therethrough, the nozzle assembly coupling hole being formed by opening a region from a surface of the housing that is expected to the one end of the piston to a region of the housing that corresponds to the one end of the piston,
the nozzle block coupling hole is provided with an opening/closing member for opening/closing the nozzle block coupling hole.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190073150A KR20200144914A (en) | 2019-06-19 | 2019-06-19 | Needleless consecutive injector allembly |
| KR10-2019-0073150 | 2019-06-19 | ||
| KR10-2019-0110705 | 2019-09-06 | ||
| KR1020190110705A KR102336021B1 (en) | 2019-09-06 | 2019-09-06 | Nozzle assembly, injector body and needleless injector includind the nozzle assembly and the injector body |
| PCT/KR2019/011611 WO2020256217A1 (en) | 2019-06-19 | 2019-09-09 | Nozzle assembly, injector body, and needle-free injector including same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113613695A true CN113613695A (en) | 2021-11-05 |
| CN113613695B CN113613695B (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980093518.5A Active CN113613695B (en) | 2019-06-19 | 2019-09-09 | Nozzle assembly, injector body and needleless injector comprising same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7039703B2 (en) |
| CN (1) | CN113613695B (en) |
| WO (1) | WO2020256217A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114917431A (en) * | 2022-05-17 | 2022-08-19 | 北京快舒尔医疗技术有限公司 | Syringe body and syringe having the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113398384B (en) * | 2021-06-24 | 2022-02-08 | 江苏铂可医疗科技有限公司 | High-pressure locking prevention structure and method for needleless injector |
| CN115337503B (en) * | 2022-09-07 | 2023-11-10 | 北京快舒尔医疗技术有限公司 | Needleless injector |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020256217A1 (en) | 2020-12-24 |
| JP2021531049A (en) | 2021-11-18 |
| CN113613695B (en) | 2023-04-18 |
| JP7039703B2 (en) | 2022-03-22 |
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