JP7039703B2 - Nozzle assembly, syringe body, and needleless syringe containing it - Google Patents

Description

The present invention relates to a nozzle assembly, a syringe body, and a needleless syringe containing the same, and more particularly, a nozzle assembly capable of continuously injecting a drug solution without a needle, a syringe body, and a needleless syringe containing the same. Related to.

Traditionally, needle syringes have been used to inject drugs, or drug solutions, into animals or humans. However, such needle syringes have various problems such as cross-contamination of the subject to be scanned, pain associated with such injection, and needle breakage and dropout within the subject to be scanned. There is a point. In particular, if the needle breaks or falls off within the subject to be scanned, it not only harms the subject's health and safety, but can also induce considerable financial problems.

Various companies are accelerating the development of needleless syringes as a trial to avoid the problems associated with needled syringes currently in use.

The needleless syringe does not have a needle that penetrates the skin of an animal or human for injection of the drug solution, and the drug solution is injected through a momentary pressure.

However, some of the existing needleless syringes are unsanitary and may be at risk of infection because the drug solution to be injected into the subject and the mechanism are integrally provided. Alternatively, some products in the manual needleless syringe can only inject the drug solution once in one loading, so that it is inconvenient to inject continuously.

An object of the present invention is to provide a nozzle assembly, a syringe body, and a needleless syringe containing the nozzle assembly, which is hygienic and can reduce the risk of infection.

Another object of the present invention is to provide a nozzle assembly capable of continuously injecting a drug solution, a syringe body, and a needleless syringe including the nozzle assembly.

The problems to be solved by the present invention are not limited herein, and other problems not mentioned should be clearly understood by ordinary engineers from the description below.

The present invention provides a needleless syringe. According to one embodiment, the needleless syringe comprises a nozzle assembly in which the drug solution is housed and the drug solution is discharged, and a syringe body that applies pressure to the nozzle assembly so that the drug solution is discharged. The nozzle assembly includes a nozzle container in which a space for accommodating the chemical solution is provided and a discharge hole for discharging the chemical solution is formed, and a plunger for applying pressure to the chemical solution in the nozzle container. The syringe body includes a piston connected to the plunger, a piston elastic member that applies an elastic force to the piston in the first direction in which the plunger applies pressure to the drug solution, and the piston in the first direction. It includes a loading unit that moves to a locking position in a second direction opposite to that, and a locking unit that locks the piston so that it is stopped at the locking position and releases the locking.

The nozzle assembly can be provided detachably to the syringe body.

An injection hole into which the chemical solution can be injected from the outside can be formed in the nozzle container.

The plunger can be inserted and removed from the nozzle container through the injection hole.

One end of the plunger is exposed to the outside of the nozzle container through the injection hole, and one end of the plunger and one end of the piston are fixed to each other in the first direction and the second direction. Can be provided to engage.

The space of the nozzle container includes a first space adjacent to the discharge hole and communicated with the discharge hole and a second space provided farther from the discharge hole than the first space, and includes the second space provided in the first direction. When viewed, the diameter of the first space is provided smaller than the diameter of the second space, and the other end of the plunger can be inserted from the second space into the first space.

The plunger is formed with a chemical liquid moving path penetrating between one region on the side surface and the other end, and prevents backflow of fluid from the discharge hole to the first space in the first space. Department is provided,
The one area on the side surface is located in the second space when the plunger is located in the locking position, and the plunger is positioned adjacent to the discharge hole from the locking position. Can be located in the first space.

The present invention also provides a nozzle assembly in which a drug solution is housed inside, is attached to and detached from the syringe body, and the drug solution is discharged by the pressure applied by the syringe body. According to one embodiment, the nozzle assembly is provided with a space for accommodating the chemical solution inside, a nozzle container in which a discharge hole for discharging the chemical solution is formed, and a plan for applying pressure to the chemical solution in the nozzle container. The plunger, including the jar, is attached to and detached from the piston of the syringe body and is moved by the movement of the piston.

An injection hole into which the chemical solution can be injected from the outside can be formed in the nozzle container.

The plunger is inserted into and detached from the nozzle container through the opposite surface of the nozzle container on which the discharge hole is formed, and one end of the plunger is the nozzle with the plunger inserted into the nozzle container. A grip that is exposed to the outside of the container and can be gripped by the user is provided at one end of the plunger, which is removed from the plunger after the plunger has been inserted into the nozzle container. Can be done.

The space of the nozzle container includes a first space adjacent to the discharge hole and communicated with the discharge hole, and a second space provided farther from the discharge hole than the first space, and includes the second space provided in the first direction. When you look,
The diameter of the first space is provided to be smaller than the diameter of the second space, and the other end of the plunger can be inserted from the second space into the first space.

The plunger is formed with a chemical liquid moving path penetrating between one region on the side surface and the other end, and backflow prevention is prevented in the first space from the backflow of fluid from the discharge hole to the first space. A portion is provided such that the one area of the side surface is located in the second space when the plunger is located in the locking position so that the plunger is adjacent to the discharge hole from the locking position. If it is positioned, it can be located in the first space.

The first space includes an insertion space into which the plunger is inserted and a valve providing space that is communicated with the discharge hole and is adjacent to the discharge hole from the insertion space, and is between the insertion space and the valve providing space. Provided is a backflow prevention wall in which a backflow prevention hole opened and closed by the backflow prevention portion is formed, and the backflow prevention portion is provided at a position corresponding to the backflow prevention hole in the valve providing space. The member may include 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 in which a nozzle assembly containing a chemical solution is detached and pressure is applied to the nozzle assembly so that the chemical solution is discharged. According to one embodiment, the syringe body comprises a piston from which the plunger of the nozzle assembly is attached and detached, and a piston elastic member that applies an elastic force to the piston in a first direction in which the plunger applies pressure to the chemical solution. An internal loading section that moves the piston to a locking position in a second direction opposite to the first direction, a locking section that locks the piston so that it is stopped at the locking position, and releases the locking. Includes a housing in which a space is formed in which the piston is provided.

The housing is open from a surface facing one end of the piston to a region corresponding to the one end of the piston so that the nozzle assembly is inserted into the side surface of the housing from the surface facing the one end of the piston. A nozzle assembly coupling hole to be opened is formed, and the nozzle assembly coupling hole can be provided with an opening / closing member for opening and closing the nozzle assembly coupling hole.

The nozzle assembly, the syringe body, and the needleless syringe including the nozzle assembly according to the embodiment of the present invention are hygienic and can reduce the risk of infection.

Further, the nozzle assembly, the syringe body, and the needleless syringe including the nozzle assembly according to the embodiment of the present invention can continuously inject the drug solution.

It is a perspective view which showed the needleless syringe which concerns on one Embodiment of this invention. It is a side sectional view showing the operation ready state after the nozzle assembly of the needleless syringe of FIG. 1 is connected to the syringe body. It is a side sectional view showing the region adjacent to the discharge hole of the needleless syringe of FIG. 2 is a side sectional view showing a region adjacent to the other end of the piston of the needleless syringe of FIG. 2. It is a side sectional view which showed the shape which the piston of the needleless syringe of FIG. 1 is moved to a locking position. It is a side sectional view showing the region adjacent to the discharge hole of the needleless syringe of FIG. It is a side sectional view showing the shape in which the piston of the needleless syringe of FIG. 1 is located at the locking position. It is a side sectional view showing the region adjacent to the discharge hole of the needleless syringe of FIG. 7. FIG. 7 is a side sectional view showing a region adjacent to the other end of the piston of the needleless syringe of FIG. 7. It is a side sectional view showing the shape of the state in which the drug solution of the needleless syringe of FIG. 1 is discharged. It is a side sectional view showing the region adjacent to the discharge hole in a certain state in which the drug solution of the needleless syringe of FIG. 1 is discharged. It is a side sectional view showing the shape of the needleless syringe of FIG. It is a side sectional view showing the shape in which the chemical solution of the needleless syringe of FIG. 1 is discharged and the force applied to the handle is loosened. It is a drawing which sequentially showed an example of the method of injecting a chemical solution into the nozzle assembly of FIG. It is a drawing which sequentially showed an example of the method of injecting a chemical solution into the nozzle assembly of FIG. It is a drawing which sequentially showed an example of the method of injecting a chemical solution into the nozzle assembly of FIG.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The embodiments of the present invention can be transformed into various embodiments and should not be construed as limiting the scope of the invention to the following embodiments. The present embodiment is provided to further fully illustrate the invention to those with average knowledge in the art. Therefore, the shape of the elements in the drawings has been exaggerated to emphasize a clearer explanation.

FIG. 1 is a perspective view showing a needleless syringe 10 according to an embodiment of the present invention. FIG. 2 is a side sectional view showing an operation ready state after the nozzle assembly 1000 of the needleless syringe 10 of FIG. 1 is coupled to the syringe body 2000. FIG. 3 is a side sectional view showing a region adjacent to the discharge hole 1120 of the needleless syringe 10 of FIG. FIG. 4 is a side sectional view showing a region adjacent to the other end of the piston 2100 of the needleless syringe 10 of FIG. Referring to FIGS. 1 to 4, the needleless syringe 10 includes a nozzle assembly 1000 and a syringe body 2000.

The nozzle assembly 1000 contains a chemical solution inside. The nozzle assembly 1000 is provided so that the chemical solution contained therein is ejected by the pressure applied by the syringe body 2000. According to one embodiment, the nozzle assembly 1000 includes a nozzle container 1100, a plunger 1200, and a backflow prevention unit 1300. The nozzle assembly 1000 is provided detachably on the syringe body 2000.

The nozzle container 1100 is provided with a space 1110 in which a chemical solution is housed. The nozzle container 1100 is formed with a discharge hole 1120 for discharging the chemical solution contained therein. 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 toward the body portion into which the drug solution is injected. For example, the discharge hole 1120 can be formed on the end surface of the nozzle container 1100 in a direction opposite to the direction toward the syringe 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 one embodiment, the injection hole 1130 can be formed on the surface of the nozzle container 1100 facing the syringe body 2000 in a state of being coupled to the syringe body 2000. The injection hole 1130 can be formed on the opposite surface of the surface on which the discharge hole 1120 of the nozzle container 1100 is formed.

According to one 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 adjacent to the discharge hole 1120 of the space 1110 of the nozzle container 1100 and communicating with the discharge hole 1120. According to one embodiment, the first space 1111 includes an insertion space 1111a and a valve providing space 1111b.

The plunger 1200 is inserted into the insertion space 1111a. The valve providing space 1111b is directly communicated with the discharge hole 1120. The valve providing space 1111b is located adjacent to the discharge hole 1120 from the insertion space 1111a. A backflow prevention wall 1310 is provided between the insertion space 1111a and the valve providing space 1111b. A backflow prevention hole 1311 is formed in the backflow prevention wall 1310. At the time of discharging the chemical solution, the chemical solution in the insertion space 1111a flows into the valve providing space 1111b through the backflow prevention hole 1311.

The second space 1112 is a region provided farther from the discharge hole 1120 than the first space 1111 of the space 1110 of the nozzle container 1100.

When viewed in the first direction, the diameter of the first space 1111 is provided smaller than the diameter of the second space 1112. According to one embodiment, the first direction is from the syringe body 2000 towards the nozzle assembly 1000.

According to one embodiment, an O-ring 1140 can be provided in a region of the first space 1111 adjacent to the second space 1112. The inner surface of the O-ring 1140 is provided so as to be in close contact with the side surface of the plunger 1200. The O-ring 1140 is provided with an elastic waterproof material. By providing the O-ring 1140, it is possible to prevent the drug solution from being transferred between the side surface of the plunger 1200 and the inner surface surface of the first space 1111.

The plunger 1200 applies pressure to the chemical solution in the nozzle container 1100. The plunger 1200 can be inserted into and detached from the nozzle container through the opposite surface of the surface on which the discharge hole 1120 of the nozzle container 1100 is formed. For example, the plunger 1200 can be inserted and removed from the nozzle container 1100 through the injection hole 1130.

The plunger 1200 can be provided to be detached from the piston 2100 of the syringe body 2000. The plunger 1200 can be moved by the movement of the piston 2100. One end of the plunger 1200 can be exposed to the outside of the nozzle container 1100 through the injection hole 1130 with the plunger 1200 inserted in the nozzle container 1100. One end of the plunger 1200 and one end of the piston 2100 mesh with each other so as to be fixed in the first direction and the second direction. The second direction is opposite to the first direction.

The other end 1220 of the plunger 1200 is inserted and detached from the second space 1112 into the first space 1111 along the first direction and the second direction.

According to one embodiment, the plunger 1200 is formed with a drug solution transfer path 1230. The chemical transfer path 1230 is formed so as to penetrate between one area on the side surface of the plunger 1200 and the other end 1220 of the plunger 1200. The area on the side surface of the plunger 1200 is located in the second space 1112 when the plunger 1200 is located in the locking position, and the plunger 1200 is located adjacent to the discharge hole 1120 from the locking position. In the case, it is located in the first space 1111.

A backflow prevention unit 1300 is provided in the first space 1111. The backflow prevention unit 1300 prevents the chemical solution such as the chemical solution and the external air from flowing back from the discharge hole 1120 to the first space 1111. According to one 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 prevention hole 1311 in the valve providing space 1111b. The valve member 1320 is moved according to 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 and separated from the backflow prevention wall 1310 to open and close the backflow prevention hole 1311. Can be done.

The valve elastic member 1330 applies an elastic force to the valve member 1320 in the direction from the discharge hole 1120 toward the backflow prevention hole 1311. The valve elastic member 1330 is provided with a coiled spring whose diameter decreases from the discharge hole 1120 to the valve member 1320 in order to form a gap through which the chemical solution can be discharged into the discharge hole 1120 in a compressed state. Can be done.

The syringe body 2000 applies pressure to the nozzle assembly 1000 so that the chemical solution in the nozzle assembly 1000 is ejected. According to one embodiment, a nozzle assembly 1000 containing a chemical solution 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 section 2300, a locking section 2400, and a housing 2500.

The piston 2100 is connected to the plunger 1200. According to one embodiment, a plunger 1200 is detachably connected to the piston 2100. An inner ball accommodating groove 2130 is formed on the side surface of the piston 2100. The inner ball accommodating groove 2130 is provided so that when the piston 2100 is positioned in the locking position, the locking ball 2420 moves inward and is accommodated in the inner ball accommodating groove 2130.

The piston elastic member 2200 applies an elastic force to the piston in the first direction in which the plunger 1200 applies pressure to the chemical solution in the nozzle container 1100. The piston elastic member 2200 can be provided by a coiled spring.

The loading unit 2300 moves the piston 2100 to the locking position in the second direction. According to one embodiment, the loading section 2300 includes a handle 2310 and a locking projection 2320.

The handle 2310 is provided so as to be rotatable about one end extending from the side surface of the housing 2500 and connected to the housing 2500 so that the other end can rotate between a position in contact with the housing 2500 and a position far from the housing 2500.

According to one embodiment, a locking projection 2320 extending towards the housing is provided on the side surface of the handle 2310 towards the housing 2500. The locking projection 2320 is provided such that one end connected to the side surface of the handle 2310 is centered and the other end is rotatable along a plane parallel to the rotation plane of the handle 2310.

According to one embodiment, the area corresponding to the handle 2310 on the side surface of the housing 2500 is provided to be open. A locking member 2110 is provided in which the other end of the locking projection 2320 hangs in the second direction in the region corresponding to the region of the handle 2310 on the side surface of the piston 2100.

Therefore, if the other end of the handle 2310 is moved from a position far from the housing 2500 to an adjacent position, the other end of the locking projection 2320 is hooked on the locking member 2110 and the second direction is applied to the locking member 2110. Will apply force to.

The loading portion 2300 can be provided with a locking projection elastic member whose other end applies an elastic force to the locking projection 2320 in a direction far from the handle 2310. Therefore, the handle 2310 is moved by the user in the direction of the housing 2500 in order to position the piston 2100 in the locking position, and then moved to a position far from the housing 2500 again by the elastic force of the locking projection elastic member.

The locking unit 2400 is locked so that the piston 2100 is stopped at the locking position, and the locking is released. According to one embodiment, the locking portion 2400 includes a push button 2410, a locking ball 2420, a ball accommodating member 2430, and a ball accommodating member elastic member 2440.

The push button 2410 is provided on the opposite side of the facing end facing the plunger 1200 of the piston 2100 of the housing 2500.

The locking ball 2420 is provided to be rotatable in one position inside the housing 2500. A plurality of locking balls 2420 can be provided so as to surround the side surface adjacent to the other end of the piston 2100. The locking ball 2420 is provided so as to be fixed with respect to the first direction and the second direction. The locking ball 2420 is provided so as to be movable along a direction perpendicular to the first and second directions.

The ball accommodating member 2430 is moved in the first direction by the push button 2410. An outer ball accommodating groove 2431 is formed in the ball accommodating member 2430. The outer ball accommodating groove 2431 provides a space in which the locking ball 2420 can move outward when the position of the ball accommodating member 2430 is positioned corresponding to the locking ball 2420.

The ball accommodating member elastic member 2440 applies an elastic force to the ball accommodating member 2430 in the second direction. The ball accommodating member elastic member 2440 can be provided by a coiled spring.

The housing 2500 has a space inside where the piston 2100 is provided. According to one embodiment, the housing 2500 is open to a surface facing one end of the piston 2100. Nozzle assembly connecting holes are formed on the side surface of the housing 2500 so that the nozzle assembly 1000 is inserted into the housing 2500.

The nozzle assembly coupling hole is formed so as to open from the surface toward one end of the piston 2100 to the corresponding region of one end of the piston 2100.

The nozzle assembly coupling hole can be provided with an opening / closing member 2520 that opens and closes the nozzle assembly coupling hole. According to one embodiment, the opening / closing member 2520 is connected to the housing 2500 by a hinge 2521 at one end toward the second direction, and between a position centered on the one end and the other end toward the first direction and a position far from the housing. The nozzle assembly coupling hole can be opened and closed by rotating.

Hereinafter, a method of injecting a drug solution using the needleless syringe 10 of FIG. 1 will be described.

Referring to FIGS. 2 to 4, the nozzle assembly 1000 in a state where the chemical solution is supplied to the space of the nozzle container 1100 is coupled to the syringe body 2000. According to one embodiment, with the opening / closing member 2520 open, the nozzle assembly 1000 is housing such that one end protruding into the injection hole 1130 of the plunger 1200 through the nozzle assembly coupling hole is coupled to one end of the piston 2100. It is inserted into 2500 and combined with the syringe body 2000. At this time, the piston 2100 is in a state where the locking is released. Therefore, the plunger 1200 is in a state of being maximally inserted into the insertion space 1111a. Further, the locking ball 2420 is in a state of being inserted into the outer ball accommodating groove 2431, and the inner ball accommodating groove 2130 is in a state of being moved in the first direction from a position facing the locking ball 2420.

FIG. 5 is a side sectional view showing a shape in which the piston 2100 of the needleless syringe 10 of FIG. 1 is moved to the locking position. FIG. 6 is a side sectional view showing a region adjacent to the discharge hole 1120 of the needleless syringe 10 of FIG. Referring to FIGS. 5 and 6, after the process of FIG. 2 has been performed, if the user applies a force to the handle 2310 to move the handle 2310 in the direction in which the housing 2500 is located, the piston 2100 will be second. Moved to the locking position along the direction. At this time, the plunger 1200 also moves in the second direction together with the piston 2100, and the backflow prevention wall of the insertion space 1111a until the hole formed on the side surface of the piston 2100 of the chemical liquid moving path 1230 is exposed to the second space 1112. The space between the other ends of the 1310 and the piston 2100 is in a vacuum state. The user can apply force to the handle 2310 toward the housing 2500 by grasping both the periphery of the side surface of the handle 2310 and the housing 2500 by hand. At this time, when the handle 2310 is completely moved toward the housing 2500, the end of the auxiliary protrusion vertically protruding from one end of the locking protrusion 2320 is outside the region corresponding to the auxiliary protrusion on the side surface of the housing. As it protrudes outward, it is rotated along the inclined surface of the inclined projection having an inclined surface inclined in the first direction, and accordingly, the locking projection 2320 is rotated to the other end of the locking projection 2320. Will deviate from the locking member 2110.

FIG. 7 is a side sectional view showing a shape in which the piston 2100 of the needleless syringe 10 of FIG. 1 is located at the locking position. FIG. 8 is a side sectional view showing a region adjacent to the discharge hole 1120 of the needleless syringe 10 of FIG. 7. 9 is a side sectional view showing a region adjacent to the other end of the piston 2100 of the needleless syringe 10 of FIG. 7. FIG. With reference to FIGS. 7-9, once the process of FIGS. 5 and 6 is completed, the piston 2100 is positioned so that the inner ball accommodating groove 2130 corresponds to the locking ball 2420. Therefore, the locking ball 2420 is accommodated in the inner ball accommodating groove 2130, and the locking ball 2420 that has stopped the ball accommodating member 2430 is moved to the inner ball accommodating groove 2130, so that the ball accommodating member 2430 is a ball accommodating member elastic member. It is moved in the second direction by the elastic force of 2440. Therefore, the locking ball 2420 is prevented from being moved outward by the region located in the first direction from the outer ball accommodating groove 2431 of the ball accommodating member 2430, and the piston 2100 is accommodated in the inner ball accommodating groove 2130. It is stopped at the locking position by the locking ball 2420. In this case, the hole formed on the outside of the plunger 1200 of the chemical liquid moving path 1230 is exposed to the second space 1112, so that the chemical liquid in the second space 1112 flows into the vacuum-state insertion space 1111a through the chemical liquid moving path 1230. Will be done.

FIG. 10 is a side sectional view showing the shape of the needleless syringe 10 of FIG. 1 in a state where the drug solution is discharged. FIG. 11 is a side sectional view showing a region adjacent to the discharge hole 1120 in a certain state in which the drug solution of the needleless syringe 10 of FIG. 1 is discharged. FIG. 12 is a side sectional view showing the shape of the needleless syringe 10 of FIG. Referring to FIGS. 10 to 12, when the user presses the push button 2410 with the thumb or the like while holding the needleless syringe 10 by hand as described above, the ball accommodating member 2430 has the outer ball accommodating groove 2431. Is moved in the first direction to the position corresponding to the locking ball 2420. Therefore, the locking ball 2420 accommodated in the inner ball accommodating groove 2130 is moved to the outer ball accommodating groove 2431, and the locking ball 2420 is inserted into the inner ball accommodating groove 2130 so that the locked piston 2100 is a piston elastic member. It is moved in the second direction by the elastic force of 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, whereby the chemical solution contained in the insertion space 1111a is discharged through the discharge hole 1120. At this time, the valve member 1320 is moved toward the discharge hole by the pressure of the chemical solution applied by the piston 2100, and the chemical solution is transmitted to the discharge hole through between the valve member 1320 and the backflow prevention hole 1311.

FIG. 13 is a side sectional view showing a shape in which the chemical solution of the needleless syringe 10 of FIG. 1 is discharged and the force applied to the handle 2310 is relaxed. Referring to FIG. 13, when the user loosens the hand holding the needleless syringe 10 after the drug solution is discharged, the locking protrusion 2320 rotates due to the elastic force of the locking protrusion elastic member to house the handle 2310. By rotating in a direction far from 2500, the needleless syringe 10 is in the same state as in FIG. 1 again, and by repeating the above-mentioned method, a certain amount of the drug solution can be repeatedly scanned again. In particular, as described above, in the needleless syringe 10 according to the embodiment of the present invention, at the time of one discharge, only the chemical solution flowing into the insertion space 1111a is discharged among the chemical solutions contained in the nozzle container 1100. Once the nozzle assembly 1000 containing the drug solution is coupled to the syringe body 2000, the drug solution can be continuously scanned several times by a fixed amount.

Hereinafter, a method of injecting a chemical solution into the nozzle assembly 1000 of the needleless syringe 10 according to the embodiment of the present invention will be described.

14 to 16 are drawings showing sequentially an example of a method of injecting a chemical solution into the nozzle assembly 1000 of FIG. 1. Referring to FIGS. 14 to 16, a dropper 30 or the like is used to inject the chemical solution into the vacant nozzle assembly 1000 through the injection hole 1130.

Then, the plunger 1200 is inserted into the nozzle assembly 1000 into which the chemical solution has been injected through the injection hole 1130 from the other end 1220.

According to one embodiment, a grip portion 1240 can be provided at one end of the plunger 1200. The user can easily move the plunger 1200 while gripping the grip portion 1240. The grip portion 1240 is removed from the plunger 1200 after the plunger 1200 has been inserted into the nozzle container 1100. An adjacent region of the side surface of the plunger 1200 of the grip portion 1240 can be formed with a cutting region provided so as to be recessed only inward along the peripheral direction of the side surface of the plunger 1200. Therefore, when a force is applied to the grip portion 1240 to remove it from the ranger 1200, the cut region is cut and the grip portion 1240 can be easily removed.

As described above, the needleless syringe 10 according to the embodiment of the present invention can continuously scan a fixed amount of the drug solution a plurality of times by changing the nozzle assembly 1000 once. Further, the needleless syringe 10 according to the embodiment of the present invention is hygienic and can reduce the risk of infection because the nozzle assembly 1000 in which the drug solution is housed is used in turn.

The above detailed description is to illustrate the present invention. Further, the above-mentioned contents are described by exemplifying a preferred embodiment of the present invention, and the present invention can be used in various other partnerships, modifications, and environments. That is, it is possible to change or modify the scope of the concept of the invention disclosed in the present specification, the scope equivalent to the above-mentioned disclosure content, and / or the scope of technology or knowledge in the art. The above-described embodiment is to explain the best state for embodying the technical idea of the present invention, and various changes required in the specific application fields and applications of the present invention are possible. Therefore, the above detailed description of the invention is not intended to limit the invention to the disclosed embodiments. The scope of the attached claims shall be construed to include other implementation states.

Claims (13)

A nozzle assembly in which the chemical solution is stored and the chemical solution is discharged,
Includes a syringe body, which applies pressure to the nozzle assembly so that the drug solution is ejected.
The nozzle assembly
A nozzle container in which a space for accommodating the chemical solution is provided and a discharge hole for discharging the chemical solution is formed, and a nozzle container.
A plunger that applies pressure to the chemical solution in the nozzle container, and the like.
The syringe body is
The piston connected to the plunger and
A piston elastic member that applies an elastic force to the piston in the first direction in which the plunger applies pressure to the chemical solution.
A loading unit that moves the piston to the locking position in the second direction opposite to the first direction.
Includes a locking portion that locks the piston so that it is stopped at the locking position and releases the locking.
The space of the nozzle container includes a first space adjacent to the discharge hole and communicating with the discharge hole, and a second space provided farther from the discharge hole than the first space.
When viewed in the first direction, the diameter of the first space is provided smaller than the diameter of the second space.
The plunger is a needleless syringe inserted from the second space into the first space . The needleless syringe according to claim 1, wherein the nozzle assembly is detachably provided to the syringe body. The needleless syringe according to claim 1, wherein an injection hole into which a drug solution can be injected is formed in the nozzle container. The needleless syringe according to claim 3, wherein the plunger is inserted into and detached from the nozzle container through the injection hole. One end of the plunger is exposed to the outside of the nozzle container through the injection hole.
The needleless syringe according to claim 4, wherein one end of the plunger and one end of the piston are provided so as to engage with each other so as to be fixed to each other in the first direction and the second direction. The plunger is formed with a chemical flow path penetrating between one area on the side surface and the other end.
The first space is provided with a backflow prevention unit that prevents a fluid from flowing back from the discharge hole to the first space.
The one area on the side surface is located in the second space when the plunger is located in the locking position, and the plunger is positioned adjacent to the discharge hole from the locking position. The needleless syringe according to claim 1 , which is located in the first space. In a nozzle assembly in which a drug solution is housed inside, is attached to and detached from the syringe body, and the drug solution is discharged by the pressure applied by the syringe body.
A nozzle container in which a space for accommodating the chemical solution is provided and a discharge hole for discharging the chemical solution is formed, and a nozzle container.
A plunger that applies pressure to the chemical solution in the nozzle container, and the like.
The plunger is attached to and detached from the piston of the syringe body, and is moved by the movement of the piston.
The space of the nozzle container includes a first space adjacent to the discharge hole and communicating with the discharge hole, and a second space provided farther from the discharge hole than the first space.
When viewed in the first direction, the diameter of the first space is provided smaller than the diameter of the second space.
The plunger is a nozzle assembly inserted from the second space into the first space . The nozzle assembly according to claim 7 , wherein an injection hole into which a chemical solution can be injected is formed in the nozzle container. The plunger is inserted into and detached from the nozzle container through the opposite surface of the nozzle container from which the discharge hole is formed.
One end of the plunger is exposed to the outside of the nozzle container with the plunger inserted in the nozzle container.
A grip portion that can be gripped by a user is provided at the one end of the plunger.
The nozzle assembly according to claim 7 , wherein the grip portion is removed from the plunger after the plunger is inserted into the nozzle container. The plunger is formed with a chemical flow path penetrating between one region and the other end of the side surface.
The first space is provided with a backflow prevention unit that prevents the fluid from flowing back from the discharge hole to the first space.
The one area of the side surface is located in the second space when the plunger is positioned at the locking position, and when the plunger is positioned adjacent to the discharge hole from the locking position. The nozzle assembly according to claim 8 , which is located in the first space. The first space is
The insertion space into which the plunger is inserted and
It includes a valve providing space that communicates with the discharge hole and is adjacent to the discharge hole from the insertion space.
A backflow prevention wall is provided between the insertion space and the valve providing space to form a backflow prevention hole that is opened and closed by the backflow prevention portion.
The backflow prevention unit is
A valve member provided at a position corresponding to the backflow prevention hole in the valve providing space, and a valve member.
The nozzle assembly according to claim 10 , further comprising 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. In a syringe body in which a nozzle assembly containing a chemical solution is detached and pressure is applied to the nozzle assembly so that the chemical solution is discharged.
With the piston to which the plunger of the nozzle assembly is attached and detached,
A piston elastic member that applies an elastic force to the piston in the first direction in which the plunger applies pressure to the chemical solution.
A loading unit that moves the piston to the locking position in the second direction opposite to the first direction.
A locking portion that locks the piston so that it is stopped at the locking position and releases the locking.
Includes a housing in which a space is formed in which the piston is provided.
The nozzle assembly
A space for accommodating the chemical solution is provided inside, and includes a nozzle container in which a discharge hole for discharging the chemical solution is formed.
The space of the nozzle container includes a first space adjacent to the discharge hole and communicating with the discharge hole, and a second space provided farther from the discharge hole than the first space.
When viewed in the first direction, the diameter of the first space is provided smaller than the diameter of the second space.
The plunger is a syringe body inserted from the second space into the first space . The housing has an open surface toward one end of the piston.
A nozzle assembly coupling hole is formed on the side surface of the housing so as to insert the nozzle assembly so as to open from a surface toward the one end of the piston to a region corresponding to the one end of the piston.
The syringe body according to claim 12 , wherein the nozzle assembly coupling hole is provided with an opening / closing member that opens and closes the nozzle assembly coupling hole.

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