WO2019208891A1

WO2019208891A1 - Filter syringe

Info

Publication number: WO2019208891A1
Application number: PCT/KR2018/013496
Authority: WO
Inventors: 김정욱; 유재원; 석원현
Original assignee: (주)상아프론테크
Priority date: 2018-04-23
Filing date: 2018-11-08
Publication date: 2019-10-31
Also published as: CN110384842B; KR101891787B1; CN110384842A

Abstract

A filter syringe according to the present invention comprises: a cylinder having a coupling tube such that a syringe needle is coupled thereto; a filter part comprising a first path which is installed inside the cylinder and in which an injectable solution is introduced into the cylinder through the syringe needle, and a second path which is formed in the center of the first path and in which the injectable solution is discharged from the cylinder to the outside; and a piston which has, on the front side thereof, a coupling shaft member couplable to the filter part, and which moves forward or backward while a part thereof is inserted into the cylinder so as to introduce the injectable solution into the cylinder or discharge the injectable solution to the outside of the cylinder. The filter part comprises: a check valve which is connected to the syringe needle, introduces the injectable solution through the first path, and blocks the first path so as to discharge the injectable solution through the second path; a filter member which is installed on the second path so as to filter the injectable solution discharged through the second path; and a filter body which has, on one side thereof, an accommodation groove for accommodating the filter member therein so as to bring the filter member accommodated in the accommodation groove into close contact with the check valve.

Description

Filter syringe

The present invention relates to a filter syringe.

Generally, syringes are used to draw blood from a patient's blood vessels or to collect fluids other than blood from the body. On the other hand, it is used to inject the drug directly into the blood vessel, or to inject the drug into the muscle or subcutaneous.

That is, the syringe can be used to collect fluid from the body or inject the injection into the body.

On the other hand, when injecting the injection liquid into the body through the syringe, in order to transfer the drug contained in the glass ampoule or inside the vial with the rubber stopper into the syringe, the upper part of the glass ampoule is cut and the needle is inserted through the cut portion. It will inhale the drug you will be injecting.

The injection needle of the syringe used in this way is disposed of after the protective cap is put on. At this time, the doctor or nurse using the syringe is often stuck in the needle, and also in the process of disposal of the syringe is separated from the protective cap covered by the needle is also a case where the waste processor is stuck in the needle.

In this case, there is a problem of secondary infection when a syringe handler or a disposal processor is stuck in an injection needle used for a patient with an infectious pathogen, such as a B-type infected patient or AIDS patient.

In addition, when the drug is to be inhaled in the ampoule, foreign substances such as glass fragments may enter the inside of the syringe and then be injected into the human body.

An object of the present invention is to solve such a problem, and when the injection solution is injected into the patient, the filter member is passed through the filter member, thereby simplifying the injection process and preventing foreign substances such as glass particles of the ampoule from being injected into the patient. Provide a filter syringe.

As a specific means for achieving the above object, the present invention, the cylinder is formed with a coupling tube is coupled to the needle; A filter unit installed in the cylinder and including a first path through which the injection liquid flows into the cylinder through the needle and a second path formed at the center of the first path and discharged from the cylinder to the outside; And a piston having a coupling shaft member coupled to the filter unit at the front and moving forward or rearward with at least a portion inserted into the cylinder to inject the injection liquid into the cylinder or to discharge the cylinder out of the cylinder. It includes, The filter unit, Check valve connected to the needle, injecting the injection liquid through the first path, and blocking the first path to discharge the injection liquid through the second path; A filter member installed on the second path to filter the injection liquid discharged through the second path; And a filter body accommodating the filter member accommodated in the accommodating groove to the check valve, wherein the accommodating groove accommodating the filter member is formed on one side. A groove is formed, and a rear end portion is formed with an annular groove through which all of the plurality of inflow groove end portions communicate with each other and recessed forward to inject an injection liquid, and the filter body communicates with the annular groove with a portion of an outer edge thereof cut out. A plurality of incision grooves are formed, and when the injection liquid is introduced, the injection liquid is introduced into the cylinder by opening the plurality of incision grooves by pushing the check valve backward, and the check valve includes: a cylindrical tubular member; A pillar member extending from the front center of the barrel member and decreasing in diameter toward the front; And a wing member extending outward from the rear of the cylinder member, wherein the filter body comprises: a cylindrical outer cylinder member; And an inner cylinder member connected to the outer cylinder member and disposed inside the outer cylinder member, wherein a second discharge hole is formed at the center of the inner cylinder member, and the receiving groove is formed on the front surface of the inner cylinder member. The plurality of incision grooves are formed at the outer edge of the outer cylinder member, and when the injection liquid is introduced, the injection liquid opens the plurality of incision grooves by pushing back the wing member blocking the annular groove of the cylinder. Then, it may be introduced into the cylinder through the space between the cutting groove and the cylinder inner wall.

In this case, a first discharge hole may be formed in the center of the barrel member and the pillar member.

At this time, one side of the pillar member includes an incision surface formed with an incision line at least partially incision, the incision surface may selectively open and close the first discharge hole when the injection liquid is introduced or discharged.

In this case, at least one locking groove may be formed on an outer circumferential surface of the outer cylinder member, and a fixing protrusion that may engage with the locking groove may be formed on the inner circumferential surface of the cylinder.

In this case, the piston includes a gasket coupled to the front of the piston and the outer peripheral surface is in close contact with the inside of the cylinder, the coupling shaft member is disposed inside the gasket, the front portion of the coupling shaft member to the front of the gasket It may be mounted to protrude.

At this time, the coupling shaft member, is formed in front of the coupling shaft member, the engaging projection protruding in front of the gasket to be coupled to one side of the filter member; And a fastening member formed at the rear of the engaging protrusion in the coupling shaft member and protruding radially outwardly.

At this time, the fastening member is formed in a disk shape, when the coupling shaft member is moved forward may be in contact with the rear surface of the gasket by moving forward from the inside of the gasket.

At this time, the cross-sectional area is reduced from the rear to the front toward the front, the injection is discharged through the second path and the locking projection is fixed through the filter member to prevent reuse.

According to the present invention as described above has the following advantages.

(1) The present invention includes a filter unit to allow injection of an injection solution into a syringe, and when the injection solution is injected into a patient, the foreign material is injected into the patient by allowing the foreign material to be filtered while passing the filter. It provides an effect that can be prevented in advance.

(2) The present invention can prevent the reuse of the filter syringe by injecting the injection solution to the patient, including the coupling shaft member is fixed through the filter member.

1 is a perspective view showing a filter syringe according to an embodiment of the present invention.

2 is an exploded perspective view showing a filter syringe according to an embodiment of the present invention.

3 is a perspective view and a cross-sectional view showing a check valve of the filter syringe according to an embodiment of the present invention.

4 is a perspective view and a cross-sectional view showing a filter body of the filter syringe according to an embodiment of the present invention.

5 is a cross-sectional view illustrating a gasket of a filter syringe according to an embodiment of the present invention.

Figure 6 is a perspective view showing that the coupling shaft member of the filter syringe according to an embodiment of the present invention is fixed through the filter member.

Figure 7 is a cross-sectional view showing the injection of the injection in the filter syringe according to an embodiment of the present invention.

8 is a cross-sectional view showing that the injection liquid is discharged to the filter syringe according to an embodiment of the present invention.

9 is a half sectional perspective view showing the cylinder of the filter syringe cut in half according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

In this specification, terms such as "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof. In addition, when a part such as a layer, film, region, plate, etc. is said to be "on" another part, this includes not only when the other part is "right on" but also another part in the middle. Conversely, when a part such as a layer, film, region, plate, etc. is "below" another part, this includes not only the other part "below" but also another part in the middle.

1 is a perspective view showing a filter syringe according to an embodiment of the present invention. 2 is an exploded perspective view showing a filter syringe according to an embodiment of the present invention.

In the following description, as shown in FIG. 1, the cover side is defined as the front side of the piston, and the piston side is defined as the rear side of the cover, and the injection liquid refers to a substance in which foreign substances such as chemical liquid and glass particles are mixed.

1 and 2, the filter syringe 1 according to an embodiment of the present invention may include a hub 30, a cylinder 10, a piston 20, and a filter unit 50. In this case, the filter syringe 1 according to the exemplary embodiment of the present invention includes the filter unit 50 and the filter member 59 when the injection liquid is injected into the patient without passing through the filter member 59 when the injection liquid is injected into the syringe. By allowing the injection process to be simple, but foreign substances are not injected into the patient.

1 and 2, in one embodiment of the present invention, the hub 30 may include a fixing member 31 on which the needle 35 is mounted, and a cover 33 covering the needle. As shown in FIG. 2, in one embodiment of the present invention, an injection needle 35 is mounted on the front portion of the fixing member 31 so that the injection liquid may flow through the injection needle.

In addition, in one embodiment of the present invention is coupled to the coupling pipe 11 of the cylinder 10 in the rear portion of the fixing member 31 is injected or discharged through the injection needle 35 in the cylinder 10 Allow it to enter or exit.

Referring to FIG. 2, in one embodiment of the present invention, the cylinder 10 may have a cylindrical shape in which a hollow part is formed to store the injection liquid therein. At this time, the filter unit 50 may be installed inside the front part of the cylinder 10. In addition, in an embodiment of the present invention, the piston 20 may be installed at the rear of the filter unit 50 in the cylinder 10.

On the other hand, in one embodiment of the present invention, the cylinder 10 has a coupling pipe 11 is formed in the front portion can be fitted to the hub 30. In this case, the coupling pipe 11 is cylindrical and smaller than the diameter of the cylinder 10, and may be formed to protrude forward in the front center of the cylinder.

In addition, in one embodiment of the present invention, the through hole 13 may be formed in the center of the coupling pipe 11 so that the injection liquid may be introduced or discharged. An inlet groove 15 may be formed to extend radially outward at an inner circumferential surface of the rear end portion of the coupling pipe 11.

In one embodiment of the present invention, the inlet groove 15 may be formed in plural. In this case, the plurality of inflow grooves 15 may be eight, but is not limited thereto. In addition, the plurality of inlet grooves 15 may be arranged to be spaced apart in the circumferential direction of the coupling pipe (11).

On the other hand, in the embodiment of the present invention, the first fixing groove 17 is formed at the rear end of the coupling pipe 11 so that the check valve 51 may be in close contact with each other, thereby having a step. At this time, in one embodiment of the present invention, the cylinder 10 may be in close contact with the check valve 51 to the first fixing groove 17 so that the injection liquid may be introduced through the inlet groove 15 of the coupling pipe 11. .

In an embodiment of the present invention, an annular groove 10a may be formed at the front end of the cylinder 10 connected to the coupling pipe 11 so as to be recessed forward to inject the injection solution. In addition, the annular groove 10a may be in a state in which the wing member 55 of the check valve 51 is covered. At this time, in one embodiment of the present invention, the inlet groove 15 and the annular groove 10a may be connected to the injection liquid. At this time, the outer ends of the inlet grooves 15 are formed to communicate with all the annular groove (10b) so that all the injection liquid introduced into the inlet groove (15) is collected in the annular groove (10b) and then pass through the check valve 51 Flows into the cylinder 10.

Referring to FIG. 2, the filter syringe 1 according to the exemplary embodiment of the present invention is installed in the cylinder 10 so that the first path through which the injection liquid is introduced does not overlap the second path through which the injection liquid is discharged from the cylinder. It may include a portion (50). In this case, the first path may be formed on the outer circumferential portion so as not to overlap the second path.

Through this, the filter syringe 1 according to the embodiment of the present invention does not go through the filter member 59 when injecting the injection into the cylinder 10, and passes through the filter member 59 when injecting the injection into the patient. This allows the injection process to be simple and to ensure that the ampoule's free particles are not injected into the patient.

At this time, the first path is the passage hole 13, the inlet groove 15, the annular groove (10a) and the cutting groove 67, the second path is the second discharge hole (65a), the first discharge hole (51a) And a through hole 13.

In more detail, in one embodiment of the present invention, the filter unit 50 may be coupled to the inner front portion of the cylinder 10 and include a check valve 51, a filter member 59, and a filter body 61. At this time, the filter syringe 1 according to an embodiment of the present invention may include a filter unit 50 to filter foreign substances contained in the injection liquid when the injection liquid is discharged.

2 and 3, in one embodiment of the present invention, the check valve 51 may selectively open and close one path of the first path and the second path. In this case, the check valve 51 may be made of, for example, a silicon material as an elastic deformation material for opening and closing of the injection liquid. Therefore, the check valve 51 should be excellent in elasticity and harmless to hygiene.

Meanwhile, in one embodiment of the present invention, the check valve 51 may include a cylinder member 53, a wing member 55, and a pillar member 57. Meanwhile, in one embodiment of the present invention, the cylinder member 53 has a cylindrical shape, and the front portion of the cylinder member may be seated and fixed in the first fixing groove 17 of the cylinder 10.

In addition, in one embodiment of the present invention, the wing member 55 is a disk shape, it may be formed extending radially outward from the rear portion of the barrel member (53). At this time, the wing member 55 may be formed of an elastic material at least the radially outer end.

That is, in one embodiment of the present invention, the wing member 55 is elastically deformed due to the pressure of the injection liquid when the injection liquid is introduced into the cylinder 10 to selectively open and close the cutting groove 67 of the filter body 61. Can be.

2 and 3, in one embodiment of the present invention, the pillar member 57 may be formed to extend forward in the front center of the barrel member 53. At this time, the pillar member 57 has a smaller cross-sectional area toward the front so that the end of the pillar member may be in contact. In addition, referring to Figure 3, in one embodiment of the present invention, the cross section of the pillar member 57 may be a triangular shape, but is not limited thereto.

Meanwhile, in one embodiment of the present invention, the pillar member 57 may include an incision surface 57a having an incision line 57b formed at least partially in the front surface thereof. In this case, in one embodiment of the present invention, the incision 57b may be formed in a straight or cross shape.

In the filter syringe 1 according to the exemplary embodiment of the present invention, the incision line 57b is closed when the injection liquid is introduced into the cylinder 10, and the incision line may be opened only when the injector is discharged to the outside of the cylinder.

Referring to FIG. 3, in an embodiment of the present invention, a center of the barrel member 53, the pillar member 57, and the wing member 55 may be provided with a first discharge hole 51 a on a second path through which the injection liquid may be discharged. ) May be formed.

2 and 4, in one embodiment of the present invention, the filter body 61 may include an outer cylinder member 63 and an inner cylinder member 65. At this time, in one embodiment of the present invention, the filter body 61 is coupled to the inner circumferential surface of the cylinder 10 so that the filter member 59 may be in close contact with the rear surface of the check valve 51.

Referring to FIG. 4, in one embodiment of the present invention, the outer cylinder member 63 may have a cylindrical shape, and the fixing protrusion 63a may extend in the circumferential direction on the outer circumferential surface thereof. At this time, in one embodiment of the present invention, the fixing protrusion 63a of the outer cylinder member 63 may be fitted into the fixing groove 10b formed on the inner circumferential surface of the cylinder 10.

On the other hand, in the embodiment of the present invention, the inner cylinder member 65 may be formed inside the outer cylinder member 63. At this time, referring to Figure 2, in one embodiment of the present invention, the outer cylinder member 63 and the inner cylinder member 65 is connected to each other is formed integrally.

In one embodiment of the present invention, the outer side of the outer cylinder member 63 may be formed with a cutting groove 67 to allow the injection liquid. At this time, the wing member 55 may be installed to cover the incision groove (67). Therefore, the injection liquid may flow between the cutting groove 67 and the inner wall of the cylinder 10.

Referring to FIG. 2, in one embodiment of the present invention, a plurality of cutting grooves 67 may be formed. At this time, the cutting groove 67 may be formed of four, but is not limited thereto. In addition, the plurality of cutting grooves 67 may be spaced apart in the circumferential direction. At this time, each of the plurality of cutting grooves 67 may be formed extending in the circumferential direction by a predetermined length.

Referring to FIG. 4, the filter body 61 is formed to be connected to each other by a cross-shaped extension so that the outer cylinder member 63 and the inner cylinder member 65 may be integrally formed. This form is very easy to injection molding the synthetic resin. In addition, by using the incision groove 67 and the inner wall of the cylinder 10 to form a passage through which the injection liquid is introduced, it is possible to design a higher rigidity than when holes are formed in the body of the filter body 61.

On the other hand, in one embodiment of the present invention, the receiving groove (65b) may be formed so that the filter member 59 is accommodated in the front of the outer cylinder member 63 in the cylindrical shape. The filter member 59 may be in close contact with the rear surface of the check valve 51 in a state seated in the receiving groove (65b).

In addition, in the exemplary embodiment of the present invention, a second discharge hole 65a through which the injection liquid is discharged to the outside of the cylinder 10 may be formed at the center of the inner cylinder member 65.

Referring to FIG. 2, in one embodiment of the present invention, the filter member 59 is installed to cover the second discharge hole 65a so that the injection member passes through the filter member 59 when the injection liquid passes through the second discharge hole 65a. You can let it pass. That is, the filter unit 50 according to an embodiment of the present invention allows the filter member 59 to pass through only when the injection liquid is discharged to the outside of the cylinder 10.

In one embodiment of the present invention, as long as the filter member 59 has a density capable of filtering foreign matter contained in the injection liquid passed through the second discharge hole 65a, various materials may be used regardless of the type.

6 to 9, the filter body 61 is formed by cutting a portion of the outer edge of the outer cylinder member 63 to form a plurality of incision grooves 67 in communication with the annular groove 10a. When the injection liquid is introduced, the injection liquid is introduced into the cylinder 10 by opening the plurality of cutting grooves 67 by pushing the wing member 55 of the check valve 51 backward.

Referring to FIG. 2, in one embodiment of the present invention, the piston 20 may include a piston body 21 and a gasket 26. At this time, in one embodiment of the present invention, the piston body 21 may include a coupling shaft member 22 protruding toward the front side so that the gasket 26 is coupled to the front portion.

At this time, in one embodiment of the present invention, the coupling shaft member 22 may include a locking protrusion 23. At this time, the coupling shaft member 22 may be formed so that the end of the coupling shaft member penetrates through the filter member 59 to prevent reuse of the needle.

Referring to FIG. 2, the coupling shaft member 22 may be formed at the center of the piston body 21 in a cylindrical shape to fit the gasket 26. In this case, the diameter of the coupling shaft member 22 may be formed to decrease from the rear to the front, so that the front portion of the coupling shaft member may pass through the filter member 59.

On the other hand, in one embodiment of the present invention, the coupling shaft member 22 may be formed with a locking projection 23 in the front end portion. In this case, the locking protrusion 23 may be formed to be inserted into the coupling hole 26a of the gasket 26. In addition, in one embodiment of the present invention, the rear end surface of the locking protrusion 23 may be supported in contact with the front end surface of the gasket while being inserted into the coupling hole 26a of the gasket 26.

In this case, referring to FIG. 5, in one embodiment of the present invention, the locking protrusion 23 may be formed to easily penetrate the filter member 59 by decreasing the diameter from the front to the rear.

2 and 5, in one embodiment of the present invention may further include a fastening member. The fastening member may be formed in a disc shape at the rear end of the coupling shaft member 22, that is, between the piston body 21 and the locking protrusion 23. At this time, in one embodiment of the present invention, the diameter of the fastening member may be smaller from the front to the rear.

Referring to FIGS. 2 and 6, in one embodiment of the present invention, the gasket 26 may be inserted into the cylinder 10 so as to be movable and made of rubber or a flexible synthetic resin having excellent sealing property. At this time, the gasket 26 is fitted to move in close contact with the inner peripheral surface of the cylinder (10).

Meanwhile, in one embodiment of the present invention, the gasket 26 may have a cylindrical shape and wrinkles (not shown) may be formed on the outer circumferential surface of the gasket in an inward direction. At this time, the wrinkle portion may be made in the form of accordion. At this time, the piston body 21 according to an embodiment of the present invention may be fitted in close contact with the inside of the cylinder 10 through the pleats of the gasket 26 to prevent the injection liquid from leaking.

Referring to FIG. 5, in one embodiment of the present invention, a coupling hole 26a may be formed at the center of the gasket 26 so that the coupling shaft member 22 of the piston 20 may be inserted and coupled thereto. At this time, when the coupling shaft member 22 is inserted into the coupling hole 26a of the gasket 26, the coupling shaft member 22 may be supported in contact with the front end surface of the locking protrusion 23 on the front surface of the gasket.

In one embodiment of the present invention, the length of the coupling hole 26a is equal to the distance between the rear end of the locking protrusion 23 and the front end of the coupling member, so that the coupling shaft member 22 penetrates the coupling hole. have.

Referring to FIG. 5, in the exemplary embodiment of the present invention, a second fixing groove 27 may be formed at the rear end of the coupling hole 26a to fix the fastening member. At this time, the coupling hole 26a is formed in the center of the second fixing groove 27 and the diameter of the second fixing groove is larger than the diameter of the coupling hole so that the second supporting jaw 29 protrudes inwardly at the end of the coupling hole 26a. ) May be formed.

7 and 8, an operation of injecting or discharging injection liquid through the filter syringe 1 according to an embodiment of the present invention will be described below.

Referring to FIG. 6, in the filter syringe 1 according to the exemplary embodiment of the present invention, the injection liquid may be introduced into the cylinder 10 by reversing the piston 20 backward. At this time, the injection solution is the first passage through the hole 13 of the coupling pipe 11, the inlet groove 15 of the coupling pipe, the annular groove (10a) of the cylinder 10 and the cutting groove 67 of the filter body 61 It can be introduced into the cylinder through.

On the other hand, referring to Figure 7, the filter syringe 1 according to an embodiment of the present invention may be discharged to the outside of the cylinder 10 by advancing the piston 20 forward when the injection liquid is discharged. At this time, the injection liquid is outside the cylinder through the second discharge hole 65a of the filter body 61, the filter member 59, the first discharge hole 51a of the check valve 51, and the passage hole 13, which are the second paths. Can be discharged.

Therefore, the filter syringe 1 according to an embodiment of the present invention has a simple injection process by passing the filter member 59 when the injection liquid is injected into the patient without passing through the filter member 59 when the injection liquid is injected into the syringe. At the same time, it is possible to prevent foreign objects from being injected into the patient.

Meanwhile, referring to FIG. 8, the filter syringe 1 according to the exemplary embodiment of the present invention pushes the piston 20 forward after the injection of the injection liquid into the patient, and thus engages the engaging protrusion 23 of the coupling shaft member 22. By allowing the filter member 59 to penetrate and be fixed, reuse of the filter syringe injecting the injection liquid to the patient can be prevented.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments set forth herein, and those skilled in the art who understand the spirit of the present invention, within the scope of the same idea, the addition of components Other embodiments may be easily proposed by changing, deleting, adding, and the like, but this will also fall within the spirit of the present invention.

The invention is applicable to syringes in the medical field.

Claims

A cylinder in which a coupling pipe is formed to couple the needle;

A filter unit installed in the cylinder and including a first path through which the injection liquid flows into the cylinder through the needle and a second path formed at the center of the first path and discharged from the cylinder to the outside; And

A piston having a coupling shaft member coupled to the filter unit at a front side and moving forward or rearward with at least a portion inserted into the cylinder to inject the injection liquid into the cylinder or to discharge the cylinder out of the cylinder;

Including,

The filter unit,

A check valve connected to the needle and injecting the injection liquid through the first path, and blocking the first path to discharge the injection liquid through the second path;

A filter member installed on the second path to filter the injection liquid discharged through the second path; And

A filter body in which an accommodating groove accommodating the filter member is formed at one side to closely contact the filter member accommodated in the accommodating groove with the check valve;

Including;

A plurality of inflow grooves are formed radially outward at the rear inner side of the coupling pipe, and the rear end portion is formed with an annular groove through which all of the plurality of inflow groove end portions communicate with each other and are recessed forward to inject the injection solution.

The filter body is formed by cutting a portion of the outer edge is formed with a plurality of incision grooves in communication with the annular groove, when the injection liquid is injected into the cylinder by opening the plurality of incision grooves by pushing the check valve back Coming inside,

The check valve,

Tubular tubular members;

A pillar member extending from the front center of the barrel member and decreasing in diameter toward the front; And

A wing member extending from the rear of the barrel member to the outside;

The filter body,

A cylindrical outer cylinder member; And

An inner cylinder member connected to the outer cylinder member and disposed inside the outer cylinder member;

Including,

A second discharge hole is formed in the center of the inner cylinder member and the receiving groove is formed on the front surface of the inner cylinder member,

The plurality of incision grooves are formed at the outer edge of the outer cylinder member, and when the injection liquid is introduced, the injection liquid opens the plurality of incision grooves by pushing the wing member blocking the annular groove of the cylinder to the rear. And a filter syringe introduced into the cylinder through a space between the cutting groove and the inner wall of the cylinder.
The method of claim 1,

A filter syringe having a first discharge hole formed in the center of the barrel member and the pillar member.
The method of claim 2,

One side of the pillar member includes an incision surface formed with an incision line cut at least a portion, wherein the incision surface selectively opening and closing the first discharge hole when the injection liquid is introduced or discharged.
The method of claim 1,

At least one locking groove is formed on the outer circumferential surface of the outer cylinder member, the filter syringe is formed on the inner circumferential surface of the cylinder is coupled to the locking groove.
The method of claim 1,

The piston

It includes a gasket coupled to the front of the piston and the outer peripheral surface is in close contact with the inside of the cylinder,

The coupling shaft member is disposed inside the gasket, and the front portion of the coupling shaft member is mounted to protrude forward of the gasket.
The method of claim 5,

The coupling shaft member,

A locking protrusion formed in front of the coupling shaft member and protruding in front of the gasket to be coupled to one side of the filter member; And

A fastening member which is formed at the rear of the engaging protrusion in the coupling shaft member and protrudes outward in a radial direction;

Filter syringe comprising a.
The method of claim 6,

The fastening member is formed in a disk shape, when the coupling shaft member moves forward from the inside of the gasket in front of the filter syringe in contact with the rear surface of the gasket.
The method of claim 7, wherein

The locking projection reduces the cross-sectional area from the rear to the front, the injection syringe is discharged through the second path after the locking projection is fixed through the filter member to prevent reuse.