KR101830639B1

KR101830639B1 - Syringe

Info

Publication number: KR101830639B1
Application number: KR1020150070671A
Authority: KR
Inventors: 석원현; 채수민; 민정식
Original assignee: (주)상아프론테크
Priority date: 2015-05-20
Filing date: 2015-05-20
Publication date: 2018-02-21
Also published as: KR20160136734A

Abstract

A syringe for a syringe is provided. The syringe for a syringe includes a cylinder to which a needle is attached forwardly, a cylinder disposed at a front portion of the cylinder, a first fluid path connected to the needle for injecting the injection fluid into the cylinder through the needle, A filter portion formed in an outer peripheral portion of the first fluid path so that the second fluid path does not overlap with the path, a piston that is capable of moving forward or backward with at least a portion thereof inserted into the inner rear portion of the cylinder, And a coupling portion formed to engage the piston and the filter portion.

Description

Syringe

The present invention relates to a syringe.

In general, a syringe is used to collect blood from a patient's blood vessel or to collect other body fluids in the body. On the other hand, it is used to inject drugs directly into the blood vessels or to inject drugs into the muscles or subcutaneously.

That is, the syringe can be used to collect body fluids in the body or to inject injections into the body.

On the other hand, in order to transfer the drug contained in the glass ampoule or the small glass bottle containing the rubber stopper into the syringe when the injection is injected into the body through the syringe, the upper part of the glass ampoule is cut and the injection needle I will inhale the drug to be injected.

When inserting an injection solution into a body through a conventional syringe, fine glass particles or debris may be mixed with the injection solution into the syringe, though not to a large extent, and the fine glass particles and the injection solution may be injected into the body together.

When injecting such injection solution into a patient, fine glass particles are injected into the body together with the injection solution, which adversely affects the health of the patient.

In addition, the conventional syringe filters the glass particles of the ampoule by the filter when sucking the injection liquid, but the injecting process is troublesome because the injector should be placed after removing the filter with the ampoule glass particles when the injection is made to the patient.

In one embodiment of the present invention, when injecting an injection liquid into a syringe, the injector injector injects the injected liquid through a filter member without passing through a filter member, thereby facilitating the injection process and preventing injection of the glass particles into the patient. to provide.

According to an aspect of the present invention, there is provided an injection apparatus including: a cylinder to which a needle is inserted forward; A first check valve installed at an inner front portion of the cylinder and connected to the injection needle to block the second fluid path to introduce the injection fluid into the cylinder through the first fluid path, A second check valve for discharging the injection liquid out of the cylinder through a fluid path, a filter member installed on the second fluid path for filtering the injection liquid discharged through the second check valve, A filter unit positioned between the filter members, the filter unit including a front portion coupled to the first check valve and a rear portion coupled to the second check valve to closely contact the filter member with the second check valve; A piston capable of moving forward or rearward with at least a part thereof inserted into the cylinder rear portion; And an engaging portion located on the first fluid path of the filter portion and configured to engage the piston and the filter portion, wherein the second check valve comprises a tubular second outer cylinder portion; At least a portion of the filter body is inserted into the second inner cylinder center portion and the filter member is inserted into the second check valve front face And a second discharge hole is formed in the second fluid path between the second outer tube and the second inner tube.
At this time, one side of the third suction hole includes a cut-away surface having at least partially incised incision, and the incision surface can selectively block the third suction hole when the injection solution is introduced or discharged.
In this case, the filter holder includes a filter holder provided inside the cylinder and having a receiving portion formed with a front portion for receiving the injection needle and a rear portion for receiving the filter portion. The filter holder has a cylindrical shape, And the through hole may be connected to the first fluid path and the second fluid path.
At this time, the coupling portion may be received in the receiving portion, and a locking protrusion protruding inwardly of the filter holder may be provided at a front portion of the receiving portion so that the coupling portion is not released forward.
At this time, the outer circumferential surface of the filter holder may be provided with an O-ring groove recessed inward to seal the inside of the cylinder and the outer circumferential surface of the filter holder.
At this time, the filter body includes a first tubular outer tubular portion, a first inner tubular portion connected to the first outer tubular portion and formed inside the first outer tubular portion, and a second inner tubular portion extending rearward from the first inner tubular portion, And an extension pipe inserted into the center of the tube.
At this time, the filter body has a first suction hole formed in the first fluid path and a second suction hole formed in the center of the first inner tube and the extension tube, and between the first outer tube and the first inner tube, A first discharge hole may be formed.
At this time, a plurality of protrusions are formed on the inner circumferential surface of the filter holder, and a plurality of fitting grooves are formed on the outer circumferential surface of the first outer tube portion to correspond to the plurality of protrusions, Lt; / RTI >
The first check valve may include a disc-shaped disc portion disposed on a front portion of the filter body so as to closely contact the front surface of the filter body to selectively block the first discharge hole when the injection liquid is introduced or discharged, And a second suction hole formed on the first fluid path at a central portion of the disc portion and the first post portion. The first suction hole may be formed in the center of the disc portion and the first post portion.
At this time, the disc portion may be spaced rearwardly of the latching jaw, and a moving space may be formed between the latching jaw and the disc portion so that the disc can be separated from the first discharge hole.
At this time, the second fluid path may be formed in the outer circumferential portion of the first fluid path so that the first fluid path and the second fluid path do not overlap with each other.
At this time, the first discharge hole and the second discharge hole may extend in the circumferential direction and may be formed to surround at least a part of the third suction hole and the first suction hole, respectively.
In this case, the piston includes a piston body which is inserted into the cylinder and moves in one direction, a gasket coupled to the front end of the piston body and fitted to the inside of the cylinder, and a gasket which is located at the front end of the piston body, And a coupling member having an open coupling groove, wherein the gasket is coupled to the piston body.
At this time, the coupling portion is provided in the movement space, and is movable forward and backward in the movement space, and includes a support portion formed to allow the injection liquid to flow in and out, and a support portion extending rearward from the support portion, And may include an engagement shaft member.
At this time, the support portion includes a bar-shaped first support member and a bar-shaped second support member coupled with the first support member, wherein the first support member and the second support member are cross- So that the injection liquid can flow in and out between the first support member and the second support member.
At this time, the rear end of the coupling shaft member includes a locking protrusion formed with forwardly recessed separation grooves, and the locking member has a coupling protrusion protruded from one side of the inside of the coupling groove, And the front end surface of the locking projection may be supported by the coupling jaw.
At this time, the locking protrusion is formed of an elastically deformable material, so that when the locking protrusion is inserted into the coupling groove, the separation groove can be opened in the outward direction.
At this time, a projecting portion protruding outward is formed on the outer circumferential surface of the front portion of the coupling shaft member, and a supporting jaw extending inward in the inner circumferential surface of the first inner tubular portion, wherein the protruding portion is supported by the supporting jaw have.
At this time, the piston body may include an elongated recess formed in the outer circumferential surface of the piston body.

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The syringe according to an embodiment of the present invention includes a first check valve and a second check valve, and when the injection liquid is injected into the syringe, the injection member is passed through the filter member when the injection liquid is injected into the patient without passing through the filter member. It is easy to prevent foreign matter from being injected into the patient.

The syringe according to an embodiment of the present invention prevents the reuse of the injection needle and prevents the injection needle from escaping to the outside, thereby preventing a safety accident that is stuck to the injection needle in the process of disposing the injection syringe.

1 is a perspective view illustrating a syringe according to an embodiment of the present invention.
2 is an exploded perspective view showing a syringe according to an embodiment of the present invention.
3 is a cross-sectional view of a syringe according to an embodiment of the present invention.
4 is a perspective view illustrating a filter unit of a syringe according to an embodiment of the present invention.
5 is a perspective view illustrating a cross-section of a filter holder of a syringe according to an embodiment of the present invention.
6 is a perspective view illustrating a cross-section of a filter body of a syringe according to an embodiment of the present invention.
7 is a perspective view showing a cross section of a second check valve of a syringe according to an embodiment of the present invention.
8 is a cross-sectional view illustrating injection of an injection liquid into a syringe according to an embodiment of the present invention.
FIG. 9 is a cross-sectional view illustrating an injection liquid being discharged into a syringe according to an embodiment of the present invention.
10 is a cross-sectional view illustrating a state in which a locking protrusion of a syringe is coupled to a coupling groove according to an embodiment of the present invention.
FIG. 11 is a cross-sectional view illustrating that the bending grooves of the syringe according to the embodiment of the present invention are exposed to the outside of the cylinder.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.
In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, where a section such as a layer, a film, an area, a plate, or the like is referred to as being "on" another section, it includes not only the case where it is "directly on" another part but also the case where there is another part in between. On the contrary, where a section such as a layer, a film, an area, a plate, etc. is referred to as being "under" another section, this includes not only the case where the section is "directly underneath"
Hereinafter, a syringe for a syringe and a syringe including the syringe according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, in one embodiment of the present invention, an injectable solution refers to a substance in which foreign substances such as a drug solution and glass particles are mixed.
1 is a perspective view illustrating a syringe including a syringe for a syringe according to an embodiment of the present invention.
In the following description, it is assumed that the lid side of the piston 10 faces forward and the lid 10 defines the rear side of the piston 10 as viewed in Fig.
1, a syringe 1 including a syringe 1 for a syringe according to an embodiment of the present invention includes a needle hub 30, a cylinder 11, a piston 10, and a filter 50, . &Lt; / RTI >
The syringe 1 according to the embodiment of the present invention includes the filter unit 50 and the filter member 65 when injecting the injection liquid into the syringe 1, ) So that the injection process is simple but the foreign substance is not injected into the patient.
2 is an exploded perspective view showing a syringe according to an embodiment of the present invention. 3 is a cross-sectional view of a syringe according to an embodiment of the present invention.
1 and 2, in one embodiment of the present invention, the needle needle hub 30 may include a fastening member 31 on which the injection needle 34 is mounted and a lid 33 covering the injection needle .
As shown in FIG. 2, in the embodiment of the present invention, the injection needle 34 may be mounted on the front portion of the fixing member 31. And may be formed in a male spiral shape on the outer peripheral surface 32 of the rear portion of the fixing member 31. [
On the other hand, the front inner circumferential surface 53 of the filter holder 51 may be formed in a helical shape and screwed to the rear portion of the fixing member 31. So that at least a part of the fixing member 31 can be installed inside the filter holder 51.
2 and 3, in an embodiment of the present invention, the cylinder 11 may have a cylindrical shape in which a hollow portion is formed to store an injection liquid therein. At this time, a filter holder 51 may be installed on the inner front portion of the cylinder 11. [
3, 4, 8, and 9, the syringe 1 according to the embodiment of the present invention is installed inside the cylinder 11, and the first fluid path through which the injection fluid flows from the cylinder is discharged from the cylinder And a filter portion 50 formed to prevent the second fluid path from overlapping with the second fluid path.
On the other hand, a second fluid path may be formed in the outer periphery of the first fluid path. The first fluid path includes a through hole 54a, a second suction hole 61a, a first suction hole 59 and a third suction hole 67a. The second fluid path is a second discharge hole 68, A first discharge hole 56b, and a through hole 54a.
The syringe 1 according to the embodiment of the present invention allows the injection of the injection liquid into the syringe 1 without passing through the filter member 65, The procedure is simple, but the glass particles of the ampoule can not be injected into the patient.
More specifically, in an embodiment of the present invention, the filter portion 50 is coupled to the front portion of the cylinder 11 and includes a filter holder 51, a first check valve 61, a filter body 55, a filter member 65, And a second check valve (66).
At this time, the syringe 1 according to an embodiment of the present invention includes the filter unit 50, and can filter foreign substances contained in the injection liquid when the injection liquid is discharged.
2, in an embodiment of the present invention, a fixing member 31 having the injection needle 34 mounted thereon is fixed to the inside of the cylinder 11 in the front portion of the filter holder 51, and the injection needle 34 The injection liquid may be introduced into the cylinder 11 or may be discharged to the outside of the cylinder.
4 and 5, the filter holder 51 may have a tubular shape and a rear portion thereof may have a receiving portion S1 in which the filter portion 50 can be received.
In the center of the filter holder 51, a passage column 54 through which the injection liquid is sucked or discharged through the injection needle 34 may be formed.
At this time, the through-hole 54 may be formed in a cylindrical shape protruding forward from the center of the filter holder 51, and a through-hole 54a may be formed in the center of the through-
The fixing member 31 is inserted into the through-hole portion 54 so that the injection hole of the passage hole 54a and the injection needle 34 can flow. At this time, the through hole 54a may be connected to the first fluid path and the second fluid path.
Referring to FIG. 5, in an embodiment of the present invention, the filter holder 51 may have a larger diameter toward the rear so as not to be pulled forward of the cylinder 11.
The O-ring groove 52 may be formed on the outer circumferential surface of the filter holder 51 so as to seal the inside of the cylinder 11 and the outer circumferential surface of the filter holder 51 inward.
At this time, an O-ring 35 is provided in the O-ring groove 52 so that the filter holder 51 can be tightly coupled to the inside of the cylinder 11.
Meanwhile, in an embodiment of the present invention, a plurality of projections 51a may be formed on the inner circumferential surface of the filter holder 51 to protrude inward. The plurality of protrusions 51a may be inserted into a plurality of fitting grooves 56a formed on the outer circumferential surface of the filter body 55 and coupled thereto.
At this time, the plurality of projections 51a may be formed to correspond to the plurality of fitting grooves 56a. The filter body 55 is coupled to the receiving part S1 of the filter holder 51 so that the filter body 55 can be fixed even when the injection liquid flows.
Referring to FIG. 5, the filter holder 51 may have a latching protrusion 51b protruding inward from a front portion of the receiving portion S1.
At this time, it is possible to prevent the support portion 79 housed in the receiving portion S1 of the filter holder 51 from being pulled out to the front of the filter holder 51 due to the engagement step 51b.
2 and 5, a receiving portion S1 formed at the rear of the filter holder 51 is provided with a coupling portion 73, a first check valve 61, a filter body 55, a filter member 65 And a second check valve 66 may be accommodated.
2 and 3, in the embodiment of the present invention, the fixing member 31 can be coupled to the front portion of the filter holder 51 with respect to the engagement protrusion 51b of the filter holder 51, ), A first check valve (61). The filter body 55, the filter member 65, and the second check valve 66 may be sequentially combined, but the order is not limited thereto.
The syringe 1 according to an embodiment of the present invention includes a first check valve 61 and a second check valve 66 so that the first fluid path and the second fluid path are arranged in different directions Only open the door.
Meanwhile, in an embodiment of the present invention, the first check valve 61 may block the second fluid path to introduce the injection fluid into the cylinder 11 through the first fluid path. The second check valve 66 is connected to the first check valve 61 and can block the first fluid path to discharge the injection liquid out of the cylinder 11 through the second fluid path.
At this time, the filter member 65 is installed in the second fluid path and is capable of filtering the injected liquid which is discharged through the second check valve 66.
Referring to FIGS. 4 and 6, the syringe 1 according to an embodiment of the present invention may include a filter body 55.
Referring to Fig. 6, the filter body 55 is positioned between the first check valve 61 and the filter member 65 in a T-shape in longitudinal section. The filter body 55 may also include a first outer tube 56, a first inner tube 57 and an extension tube 58.
The first check valve 61 is supported at the front portion of the filter body 55 and the filter member 65 is closely attached to the second check valve 66 at the rear portion.
4 and 6, the first outer tubular portion 56 is formed in the outer peripheral surface of the first outer tubular portion 56 so as to be inserted into the receiving portion S1 of the filter holder 51 in a tubular shape, The fitting groove 56a can be formed.
The plurality of fitting grooves 56a are formed to correspond to the plurality of protrusions 51a formed on the inner circumferential surface of the filter holder 51 and are fitted together.
Meanwhile, a first inner cylinder portion 57 connected to the first outer cylinder portion 56 may be formed in the first outer cylinder portion 56. The first inner tubular portion 57 may have a cylindrical shape and may be formed with a first discharge hole 56b, which is a second fluid path, between the first outer cylindrical portion 56 and the first inner cylindrical portion 57. [
6, the first inner tubular portion 57 is connected to the extension tube 58 at the rear side. The extension tube 58 may extend to the rear of the first inner tube portion 57. At this time, a first suction hole 59, which is a first fluid path, may be formed in the center of the first inner tubular portion 57 and the extension pipe 58.
In the embodiment of the present invention, the filter body 55 has a first discharge hole 56b around the first suction hole 59 formed at the center of the filter body 55, And may be formed in a pair.
3, the first discharge hole 56b may be formed around the first suction hole 59 so as to extend in the circumferential direction so as to cover at least a part of the first suction hole 59 .
Meanwhile, in an embodiment of the present invention, a supporting step 57a extending inward is formed on the inner circumferential surface of the first inner tubular part 57. [ At this time, when the coupling shaft member 15 is inserted into the first suction hole 59, the projecting portion 17 of the coupling shaft member is caught by the supporting step 57a so that the coupling shaft member 75 is engaged with the filter body 55 It may not fall backward.
On the other hand, the first check valve 61 is located in the front portion of the filter body 55, that is, the first outer cylinder portion 56 and the first inner cylinder portion 57. At this time, the first check valve 61 is inserted into the first suction hole 59 and connected to the filter body 55. So that the filter body 55 can support the disc portion 62 of the first check valve 61.
Referring to FIG. 4, in an embodiment of the present invention, the first check valve 61 may include a disc portion 62 and a first post portion 63 in a T-shape in longitudinal section.
In the embodiment of the present invention, the disc portion 62 may be disposed in a disc shape in close contact with the front surface of the filter body 55. The disc portion 62 is formed at a front portion of the first check valve 61 to selectively block the first discharge hole 56b of the filter body 55 when the injection liquid is introduced or discharged.
The disc portion 62 is spaced rearward from the engaging protrusion 51b of the filter holder 51 and is provided between the engaging protrusion 51b and the disc portion 62, A movement space S2 in which the check valve 61 can be spaced apart from the first discharge hole 56b can be formed.
That is, when the injection liquid is discharged to the outside of the cylinder 11, all or a part of the disc portion 62 in the moving space S2 moves in the direction of the latching protrusion 51b of the filter holder 51, And the movement space S2 formed between the filter body 55 and the filter body 55, as shown in Fig.
The disc portion 62 of the first check valve 61 may be formed of an elastic material so that the first discharge hole 56b of the filter body 55 due to the elastic deformation of the disc portion 62 ) Can be selectively blocked.
In an embodiment of the present invention, the first columnar portion 63 may be formed to protrude rearward from the disc portion 62 in a cylindrical shape. The first post 63 may be inserted into the first suction hole 59 of the filter body 55 and coupled with the filter body 55.
A second suction hole 61a may be formed in the central portion of the first check valve 61, that is, the disc portion 62 and the first column portion 63 to allow the injection liquid to be sucked.
At this time, when the injection liquid is sucked into the cylinder 11, the disc portion 62 of the first check valve 61 blocks the first discharge hole 56b of the filter body 55, The injection liquid can be introduced into the cylinder 11 through the second suction hole 61a.
3 and 4, the first pillar portion 63 of the first check valve 61 is inserted into the first suction hole 59 of the filter body 55 so that the first suction hole 59 2 suction holes 61a.
Meanwhile, in an embodiment of the present invention, the filter member 65 may have a disc shape and an opening 65a through which an injection liquid is sucked may be formed at the center. The filter member can be fixed between the filter body 55 and the second check valve 66 by inserting the extension pipe 58 of the filter body 55 into the opening 65a of the filter member 65. [
On the other hand, the filter member 65 is formed so as to cover the second discharge hole 68 of the second check valve 66 so that the injection liquid passes through the filter member 65 when passing through the second discharge hole 68 can do.
That is, the syringe 1 according to the embodiment of the present invention allows the injection liquid to pass through the filter member 65 only when the injection liquid is discharged, and can easily suck the injection liquid when inhaled.
In addition, the filter member 65 may be made of various materials irrespective of the type, so long as it has a density capable of filtering foreign substances contained in the injection liquid passing through the second discharge hole 68.
Referring to FIG. 7, in one embodiment of the present invention, the second check valve 66 may include a second outer tubular portion 67 and a second inner tubular portion 69 in a cylindrical shape.
On the other hand, the second outer cylinder portion 67 can be received in the receiving portion S1 of the filter holder 51 in a cylindrical shape. A second inner cylinder portion 69 connected to the second outer cylinder portion 67 may be formed in the second outer cylinder portion 67.
A second discharge hole 68 is formed in the second fluid path between the second outer cylinder portion 67 and the second inner cylinder portion 69 to discharge the injection liquid.
7, a third suction hole 67a may be formed in the center of the second inner tubular portion 67 on the first fluid path so that the injection fluid can be sucked.
At this time, the extension pipe 58 of the filter body 55 is inserted into the third suction hole 67a, so that the filter member 65 can be brought into close contact with the entire surface of the second check valve 66. Also, the first suction hole 59 and the third suction hole 67a may be connected to the first fluid path.
4, the second discharge hole 68 is formed around the third suction hole 67a formed in the second check valve 66 so as to penetrate the second check hole 66 in the longitudinal direction of the second check valve 66 May be formed.
4, the second discharge hole 68 may be formed around the third suction hole 67a so as to extend at least part of the third suction hole 67a.
Meanwhile, the syringe 1 according to the embodiment of the present invention includes a cut-out surface 71a formed at one side of the third suction hole 67a, for example, at least a cut-out 71a formed on the rear surface thereof .
Accordingly, the syringe 1 according to an embodiment of the present invention allows the injection liquid to selectively pass through the third suction hole 67a so that it can pass through the filter member 65 only when the injection liquid is discharged.
Referring to FIG. 3, in the embodiment of the present invention, the incision 71a is formed with a sheath in the form of a straight line or a cross, so that the sheathing from the outside to the inside can be opened at the time of inhalation and closed tightly at the time of inhalation .
In this case, in one embodiment of the present invention, the incision surface 71 may be formed of a material capable of elastic deformation.
Meanwhile, in an embodiment of the present invention, the first check valve 61 and the second check valve 66 may be made of a material that can be elastically deformed, for example, a silicon material for opening and closing the flow path. Therefore, the first check valve 61 and the second check valve 66 should be excellent in elasticity and not harmful to hygiene.
Referring to FIG. 2, the syringe 1 according to an embodiment of the present invention may include a coupling portion 73.
The syringe 1 according to an embodiment of the present invention is configured to couple the filter unit 50 and the piston 10 to pull the piston 10 backward in the process of disposing the injection needle 34, Can be inserted into the cylinder 11 to prevent a safety accident that is stuck to the injection needle 34.
2, the front part of the engaging part 73 is provided in the moving space S2 between the engaging step 51b of the filter holder 51 and the first check valve 61, As shown in FIG.
The coupling portion 73 may include a support portion 79 and a coupling shaft member 75. At this time, a support portion 79 is formed on the front portion of the engaging portion 73, and an engagement shaft member 75 extending rearward from the support portion 79 is formed on the rear portion.
8, the support part 79 is provided in the moving space between the engagement step 51b of the filter holder 51 and the first check valve 61, and is engaged with the engagement step 51b and the first check valve 61, It is possible to move forward and backward.
At this time, in one embodiment of the present invention, the support portion 79 can be prevented from falling forward of the filter holder 51 due to the engagement protrusion 51b.
Meanwhile, the support portion 79 may include a first support member 79a and a second support member 79b. At this time, the first support member 79a and the second support member 79b may each have a bar shape.
The support portion 79 may be formed of any one of the first support member 79a and the second support member 79b in the form of a straight line or may have a cross shape in which the first support member 79a and the second support member 79b intersect And can be formed in a combined form.
At this time, the support portion 79 may be in any form as long as the injection liquid can flow in or out between the first support member 79a and the second support member 79b without falling out of the movement space S2.
2, the coupling shaft member 75 has a cylindrical shape and is coupled to the center portion of the support portion 79 and extends to the rear of the support portion to be engaged with the coupling member 15 formed on the front portion of the piston body 13 .
A locking protrusion 77 is formed on the rear end of the coupling shaft member 75 so that the coupling shaft member 75 and the piston body 13 are engaged by the coupling step 17 of the coupling member 15, .
At this time, the coupling shaft member 75 is connected to the second suction hole 61a of the first check valve 61, the first suction hole 59 of the filter body 55, and the second check valve 66 Through the third suction hole 67a and the cut-off surface 71 of the second suction hole 67a.
The engaging shaft member 75 is extended to the rear side through the incision 71a of the incision surface 71 so that the engaging protrusion 77 can be exposed to the injection liquid introduced into the cylinder 11. [
At this time, the engaging protrusion 77 has a triangular cross-section similar to that of the triangle, so that the area of the front end portion is larger than the area of the rear end portion, and the area gradually decreases from the front end portion to the rear end portion.
The front end of the engaging projection 77 can be engaged with the engaging jaw 17 of the engaging member when the engaging shaft member 75 is inserted into the engaging groove 15a of the engaging member 15. [
Further, a separation groove 77a which is recessed forwardly may be formed at the rear end of the locking projection 77. At this time, the separation groove 77a may be formed to be depressed forward, so that the locking protrusion 77 may have a clamping shape.
The locking protrusion 77 is formed of an elastic material so that when the locking protrusion 77 is inserted into the locking groove 15a of the locking member 15, the locking groove 77a is opened in the outward direction, The addition can be split into two parts.
Accordingly, in one embodiment of the present invention, the coupling shaft member 75 can increase the coupling force with the coupling member 15.
On the other hand, a protrusion 81 protruding outwardly may be formed on the outer peripheral surface of the coupling shaft member 75 so as to be supported by a support step 57a formed on the inner peripheral surface of the first inner cylinder 57. [
At this time, the projecting portion 81 may be formed on the outer peripheral surface of the front portion of the engagement shaft member 75, extending rearward from the support portion 79. In addition, when the coupling shaft member 75 is positioned on the first fluid path, the projection 81 is supported by the support step 57a so that the coupling shaft member 75 may not be pulled backward.
2, a syringe 1 according to an embodiment of the present invention includes a filter holder 51 coupled to a front portion of a cylinder 11, a piston 10 coupled to a rear portion of the cylinder 11, So that they can move up and down.
In one embodiment of the present invention, the piston 10 may include a piston body 13 and a gasket 19.
2 and 3, in one embodiment of the present invention, the piston body 13 may include a fastening member 15 protruding forwardly so that the gasket 19 can be coupled to the front portion thereof.
2 and 3, the fastening member 15 is formed at the central portion of the piston body 13 and the fastening protrusion 77 of the fastening member 15 is inserted into the front portion of the fastening member 15 The engaging groove 15a may be formed so as to correspond to the engaging projection.
At this time, the engaging groove 15a is located at the front portion of the fastening member 15 and can be recessed backward. Further, at the inner side of the inner side of the coupling groove 15a, for example, a coupling protrusion 17 protruding in the inward direction may be formed at the front end.
That is, the engaging jaw 17 is formed on the front side of the engaging member 15 and the engaging projection 77 engages with the engaging jaw so that the engaging shaft member 75 and the engaging member 15 can be engaged with each other .
2 and 3, in an embodiment of the present invention, the fastening member 15 may be formed integrally with the gasket 19 by fitting the gasket 19 thereto.
Referring to FIG. 11, in an embodiment of the present invention, the piston body 13 may be formed with a bending groove 13a so as to be spaced rearward from the coupling shaft member 15.
At this time, the bending grooves 13a may be formed as a pair so as to be recessed toward the inner side of the piston body so as to be easily bent when an external force is applied to the piston body 13 in a direction perpendicular thereto.
Referring to FIG. 2, in an embodiment of the present invention, the gasket 19 may be made of rubber or flexible synthetic resin which is inserted into the cylinder 11 so as to be movable up and down, and has excellent sealing properties. At this time, the gasket 19 is closely fitted to the inner peripheral surface of the cylinder 11 and moves.
Meanwhile, in one embodiment of the present invention, the gasket 19 may have a cylindrical shape and a wrinkle portion 19a may be formed on the outer circumferential surface of the gasket in the inward direction. At this time, the corrugated portion 19a may be formed in an accordion shape.
The piston body 13 according to the embodiment of the present invention is fitted tightly inside the cylinder 11 through the corrugated portion 19a of the gasket 19 to prevent the injection liquid from leaking.
2, in an embodiment of the present invention, a coupling hole 19b may be formed at the center of the gasket 19 so that the fastening member 15 of the filter body 55 can be inserted and coupled therewith . At this time, when the fastening member 15 is inserted into the fitting hole 19b of the gasket 19, the fastening member 15 can be caught and supported on the entire surface of the gasket.
Hereinafter, the operation state of the syringe 1 including the syringe according to the embodiment of the present invention will be described.
8, when the piston 10 is pulled backward, a relatively low pressure is formed in the space between the second check valve 66 and the gasket 19 of the piston 10 in the embodiment of the present invention, The disc portion 62 of the valve 61 is in close contact with the first discharge hole 56b of the filter body 55. [
At this time, the incision 71a in contact with the engaging shaft member 75 increases the urging force when the injection liquid is sucked, and the gap between the engaging shaft member 75 and the incision 71a is opened, and the injection liquid passes through the third suction hole 67a And is sucked into the cylinder.
In this state, the injection liquid passes through the first fluid path formed at the center portion, for example, the through hole 54a, the second suction hole 61a, the first suction hole 59, and the third suction hole 67a, (66) and the gasket (19) of the piston (10).
9, in the embodiment of the present invention, when the piston 10 is pushed forward, the space between the second check valve 66 and the gasket 19 of the piston 10 is relatively high, The disc portion 62 of the first check valve 61 is spaced apart from the first discharge hole 56b of the filter body 55. [
At this time, when the injection liquid is discharged, the pressing force is reduced, the incision 71a is blocked, the incision member 75 contacts the incision, and the injection liquid is discharged through the second discharge hole 68 through the filter member 65 .
In this state, the injection liquid is discharged to the outside of the cylinder through the second fluid path formed at the outer peripheral portion of the first fluid path, for example, the second discharge hole 68, the first discharge hole 56b, and the through hole 54a.
7 and 8, the syringe 1 discharging the injection liquid further pushes the piston 10 forward, so that the engagement shaft member 75 is inserted into the engagement groove 15a of the piston body 13 So that the engaging protrusions 77 are engaged with the engaging jaws 17 to be engaged.
The piston 10 is pulled backward so that the injection needle 34 completely enters the interior of the cylinder 11 and the bending groove 13a formed in the piston body 13 is exposed to the outside of the cylinder.
At this time, when the piston body 13 is cut by applying an external force to the bending groove 13a, the piston 10 can not be pulled any more, so that the injection needle 34 can not be taken out of the cylinder 11.
Accordingly, the syringe 1 including the syringe according to the embodiment of the present invention prevents the reuse of the syringe needle and prevents the syringe needle from escaping to the outside, thereby preventing a safety accident that is stuck to the syringe needle during the disposal of the syringe can do.
A syringe including a syringe according to an embodiment of the present invention includes a syringe to inject a syringe into a syringe without passing through a filter member and to inject a syringe into a patient, So that foreign matter can not be injected into the patient.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

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1: syringe 10: piston
11: cylinder 13: piston body
13a: folding groove 15:
15a: coupling groove 17: coupling jaw
19: gasket 19a:
19b: coupling hole 30: needle hub
31: fixing member 32: outer peripheral surface of the fixing member
33: lid 34: needle
35: O-ring 50: Filter section
51: filter holder 51a: projection
51b: engagement jaw 52: O-ring groove
53: inner peripheral surface of the filter holder 54:
54a: through hole 55: filter body
56: first outside tubular portion 56a: fitting groove
56b: first discharge hole 57: first inner cylinder
57a: support jaw 58: extension pipe
59: first suction hole 61: first check valve
61a: second suction hole 62:
63: first post 65: filter element
65a: opening 66: second check valve
67: second outside cylinder portion 67a: third suction hole
68: second discharge hole 69: second inner cylinder
71: incision 71a: incision
73: engaging portion 75: engaging shaft member
77: locking projection 77a: separation groove
79: Support part 79a: First support member
79b: second supporting member 81:

Claims

A cylinder to which a needle is attached forward;
The cylinder A first check valve installed in the inner front portion and connected to the injection needle and blocking the second fluid path to introduce the injection liquid into the cylinder through the first fluid path, A second check valve for discharging the injection liquid to the outside of the cylinder through the first check valve, a filter member installed on the second fluid path for filtering the injection liquid discharged through the second check valve, A filter portion including a filter body positioned between the first check valve and the second check valve, the filter body including a front portion coupled to the first check valve and a rear portion coupled to the second check valve to closely contact the filter member with the second check valve;
A piston capable of moving forward or rearward with at least a part thereof inserted into the cylinder rear portion; And
And an engaging portion located on the first fluid path of the filter portion and configured to engage the piston and the filter portion,
The second check valve
A tubular second outer tubular portion;
And a second inner cylindrical portion connected to the second outer cylindrical portion and formed inside the second outer cylindrical portion,
At least a portion of the filter body is inserted into the second inner cylinder portion and a third suction hole is formed on the second fluid path for bringing the filter member into close contact with the front surface of the second check valve,
And a second discharge hole is formed on the second fluid path between the second outer cylinder and the second inner cylinder.

The method according to claim 1,
And a cut-away surface formed at one side of the third suction hole, the cut-away surface being cut at least partially,
Wherein the incision surface selectively blocks the third suction hole when the injection liquid is introduced or discharged.

The method according to claim 1,
And a filter holder provided inside the cylinder and having a receiving portion in which the needle is coupled to the front side and the filter portion is accommodated in the rear side,
Wherein the filter holder has a cylindrical shape and a central hole formed with a through hole through which the injected liquid passes, the through hole being connected to the first fluid path and the second fluid path.

The method of claim 3,
Wherein the engaging portion is accommodated in the accommodating portion and the engaging protrusion is formed on the front portion of the accommodating portion so as to protrude inward of the filter holder so that the engaging portion does not protrude forward.

5. The method of claim 4,
Wherein an outer circumferential surface of the filter holder is provided with an O-ring groove recessed inward to seal the inside of the cylinder and the outer circumferential surface of the filter holder.

5. The method of claim 4,
The filter body
A tubular first outer tubular portion;
A first inner tubular portion connected to the first outer tubular portion and formed inside the first outer tubular portion; And
And an extension tube extending rearward from the first inner tubular portion and inserted into the second inner tubular central portion.

The method according to claim 6,
The filter body
Wherein a first suction hole is formed in the first fluid path and a first discharge hole is formed in the second fluid path between the first outer tube and the first inner tube at the center of the first inner tube and the extension tube, Formed syringe.

8. The method of claim 7,
A plurality of projections are formed on an inner peripheral surface of the filter holder,
Wherein a plurality of fitting grooves are formed on an outer circumferential surface of the first outer tube portion to correspond to the plurality of protrusions, and the filter body is coupled to the receiving portion of the filter holder.

8. The method of claim 7,
The first check valve
A disc-shaped disc portion disposed in close contact with a front surface of the filter body to selectively block the first discharge hole when the injection liquid is introduced into or discharged from the front portion; And
And a first pillar portion protruding rearward from the disc portion and inserted and coupled to the first suction hole,
And a second suction hole is formed on the first fluid path at the center of the disk and the first post.

10. The method of claim 9,
Wherein the disc portion is spaced apart from a rear side of the latching jaw so that a moving space is formed between the latching jaw and the disc portion so that the disc can be separated from the first discharge hole.

The method according to claim 1,
Wherein the second fluid path is formed at an outer periphery of the first fluid path so that the first fluid path and the second fluid path do not overlap with each other.

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8. The method of claim 7,
Wherein the first discharge hole and the second discharge hole extend in a circumferential direction and surround at least a part of the third suction hole and the first suction hole, respectively.

11. The method of claim 10,
The piston
A piston body inserted into the cylinder and moving in one direction; And
A gasket coupled to the front end of the piston body and closely fitted into the cylinder; And
And a coupling member having a coupling groove formed in a front end portion of the piston body and protruding forward and opened in one direction, the coupling member having the gasket coupled to the piston body.

15. The method of claim 14,
The coupling portion
A supporting part installed in the moving space and movable forward and backward in the moving space, the supporting part being configured to allow the injection liquid to flow in and out; And
And an engaging shaft member formed to extend rearward from the support portion and protrude through the incision.

16. The method of claim 15,
The support
A bar-shaped first support member; And
And a bar-shaped second support member coupled to the first support member,
Wherein the first support member and the second support member are cross-linked to form a cross shape so that the injection liquid can flow in and out between the first support member and the second support member.

16. The method of claim 15,
And a locking projection formed at the rear end of the coupling shaft member and having a forwardly recessed separation groove,
Wherein the coupling member has a coupling protrusion protruded from one side surface of the coupling groove,
Wherein the engaging projection is inserted into an engaging groove of the engaging member so that a front end surface of the engaging projection is supported by the engaging jaw.

18. The method of claim 17,
Wherein the locking protrusion is formed of an elastically deformable material so that when the locking protrusion is inserted into the coupling groove, the separation groove opens outward.

16. The method of claim 15,
A protruding portion protruding outwardly is formed on an outer peripheral surface of the front portion of the coupling shaft member,
And a supporting jaw extending inward in an inner peripheral surface of the first inner tubular portion,
And the projecting portion is supported by the supporting jaw.

15. The method of claim 14,
Wherein the piston body includes an indentation recess formed inwardly on an outer circumferential surface of the piston body.