KR101753478B1

KR101753478B1 - Filter assembly for syringe and syringe comprising the same

Info

Publication number: KR101753478B1
Application number: KR1020150130672A
Authority: KR
Inventors: 장수현
Original assignee: 장수현
Priority date: 2015-09-16
Filing date: 2015-09-16
Publication date: 2017-07-19
Also published as: KR20150114925A

Abstract

The filter assembly for a syringe of the present invention includes a check valve for controlling the suction and discharge of the chemical liquid and a porous sintered filter for filtering foreign substances in the chemical liquid. The check valve includes a shielding film formed with a first discharge hole for contracting by the pressure of sucking the chemical liquid and discharging the chemical liquid, and a hollow coupling column extending from the shielding film and communicating with the first discharge hole. The sintered filter has a filter portion and a discharge pillar. A plurality of filter holes are formed in the filter part, and a second discharge hole is formed at the center part to filter the foreign substances of the chemical solution sucked while the shielding film is contracted and to discharge the filtered chemical solution. The discharge column extends from the filter portion and is fitted in the coupling column, and a through hole is formed which communicates with the second discharge hole and discharges the filtered chemical liquid to the shielding film side. Since the filter assembly for a syringe has the filter formed by sintering the fine particles, it is possible to sufficiently filter the foreign matter in the chemical solution with only one sintering filter without the need of providing an additional filter, so that the assembly can be easily performed and the manufacturing cost can be reduced .

Description

[0001] The present invention relates to a filter assembly for a syringe and a syringe comprising the syringe,

The present invention relates to a filter, and more particularly, to a filter assembly for a syringe that filters foreign substances from a chemical liquid and a syringe having the filter assembly.

In general, the medicine to be administered to the patient is distributed in an ampoule made of glass or a vial packed with a rubber bottle. The drug solution contained in the ampule or vial is injected into the patient using a syringe. The glass fragments that are generated when the ampule is opened, or the rubber particles generated from the rubber stopper of the vial, are introduced into the syringe during the suction of the chemical solution by the syringe.

The glass fragments or rubber fragments introduced into the syringe may be administered to the patient together with the chemical solution to cause complications. Particularly, intravenous administration can induce phlebitis, spinal injection can cause necrosis of body tissues such as penetration into the brain, and in severe cases, it can develop into cancer.

In order to prevent this, recently, it is recommended to use a filter for a syringe, and a technique for a filter for a plurality of syringes is being developed.

Korean Patent No. 10-1178986 discloses a safety filter for a syringe contained in a syringe. The safety filter for a syringe includes a guide valve having first and second through-holes, a valve for opening / closing the second through- And a filter member attached to cover the first through-hole. Such a safety filter filters glass fragments or rubber pieces in the chemical solution by allowing the chemical solution to be discharged through the filter member only when the chemical solution is administered to the patient without passing through the filter member when the chemical solution is sucked into the syringe.

However, the safety filter disclosed in Korean Patent No. 10-1178986 is difficult to apply to a configuration in which the assembly is complicated, the number of constituent elements is large, the assemblability is low, and the space is narrow like a needle part of a syringe.

Korean Patent No. 10-1178986 (Aug. 27, 2012), " Safety Filter for Syringe and Syringe Having Same "

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter assembly for a syringe which is easy to assemble into a syringe and can efficiently filter foreign substances from a chemical solution and a syringe having the same.

According to an aspect of the present invention, there is provided a syringe filter assembly mounted on a syringe, the syringe comprising: a shielding film formed with a first discharge hole capable of contracting by a pressure for sucking a chemical solution and discharging a chemical solution; A check valve which has a hollow coupling column extending from the first discharge hole and communicating with the first discharge hole and regulating the suction and discharge of the chemical liquid; And a porous sintered filter disposed below the check valve and coupled to the check valve to filter foreign substances of the chemical liquid that is sucked while the blocking membrane is contracted. Wherein the sintered filter comprises: a disk-shaped filter portion having a plurality of filter holes formed therein and having a second discharge hole formed at a central portion thereof for discharging the filtered chemical liquid; And a discharge pillar extending from the filter unit and fitted in the coupling column, the discharge pillar communicating with the second discharge hole and having a through hole for discharging the filtered chemical liquid to the blocking membrane.

Specifically, the sintered filter may be formed by sintering synthetic resin powders.

In addition, the size of the filter hole may be 0.1 to 10 탆.

The shielding film may include a dome-shaped head portion having the first discharge hole formed therein; And a wing portion extending outwardly from an end of the head portion and surrounding the head portion, facing the filter portion, and capable of contracting by a pressure of sucking the chemical solution.

Further, the check valve may be formed of a silicon material.

Further, the first discharge hole may be closed by the pressure for discharging the chemical liquid.

According to another aspect of the present invention, there is provided a syringe including: a needle having a needle; A cylinder coupled to the needle portion and having a storage space for storing a chemical solution sucked through the needle portion; And a filter assembly inserted into the needle portion and filtering the foreign substance of the chemical solution flowing into the cylinder. Specifically, the filter assembly includes: a shielding film formed with a first discharge hole capable of contracting by a pressure of sucking the chemical liquid and discharging a chemical solution; and a hollow coupling column extending from the shielding membrane and communicating with the first discharge hole A check valve for controlling the suction and discharge of the chemical liquid; And a porous sintered filter disposed below the check valve and coupled to the check valve, for filtering foreign substances of the chemical liquid to be sucked while the blocking membrane is contracted. The sintered filter may further include a disc-shaped filter portion having a plurality of filter holes formed therein and having a second discharge hole formed at a central portion thereof for discharging the filtered chemical solution, And a discharge pillar extending from the filter unit and fitted in the coupling column, the discharge pillar communicating with the second discharge hole and having a through hole for discharging the filtered chemical liquid to the blocking membrane.

The needle portion protrudes from the inner wall of the needle portion and is disposed to abut the upper end portion of the filter portion and guides the position of the filter assembly to prevent the filter assembly from being pushed toward the upper region side of the needle portion More can be included.

Further, the needle part may be formed on the inner wall of the needle part to extend in the longitudinal direction of the needle part, so as to smooth the introduction of the drug solution into the needle part.

According to the syringe filter assembly and the syringe having the same according to the embodiment of the present invention,

First, since the sintered filter formed by sintering the fine particles is provided, it is possible to sufficiently filter the foreign substances in the chemical solution with only one sintering filter without the necessity of providing a separate additional filter.

Second, since it is not necessary to provide a plurality of filters and the structure of the sintered filter and the check valve is simple, the assembling property can be improved and the manufacturing cost can be reduced. In addition, It is easy to install.

Third, since the foreign substance filtered through the discharge column of the sintered filter is discharged and the filtered foreign matter remains between the filter portion and the head portion, a clean chemical solution can be administered to the patient without having to separate the filter assembly from the syringe, Can prevent diseases that may occur.

1 is an exploded perspective view of a syringe according to an embodiment of the present invention.
FIG. 2 is an enlarged vertical cross-sectional view of the syringe filter assembly shown in FIG. 1; FIG.
Figure 3 is an exploded perspective view of the filter assembly for a syringe shown in Figure 1;
4 is a plan view showing the check valve shown in Fig.
5 is an enlarged view of the portion 'A' of FIG. 1 enlarged.
6 is a cross-sectional view of the needle portion shown in Fig.
FIG. 7 is a vertical sectional view showing a state where the chemical solution is filtered by the filter assembly for a syringe shown in FIG. 1 and sucked into the syringe. FIG.
FIG. 8 is a longitudinal sectional view showing a state in which the chemical liquid filtered by the filter assembly for a syringe shown in FIG. 1 is discharged from the syringe.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

FIG. 1 is an exploded perspective view of a syringe according to an embodiment of the present invention, FIG. 2 is an enlarged longitudinal sectional view of the syringe filter assembly shown in FIG. 1, and FIG. FIG. 4 is a plan view of the check valve shown in FIG. 3, FIG. 5 is an enlarged view of the 'A' portion of FIG. 1, and FIG. 6 is an enlarged view of the filter assembly of FIG. Fig. 3 is a cross-sectional view showing the needle portion shown in Fig.

Referring to FIGS. 1 to 6, a syringe 400 of the present invention includes a filter assembly 100 for a syringe, a needle portion 200, and a cylinder 300.

In this embodiment, the syringe filter assembly 100 is inserted into the needle part 200 where the needle needles 210 may be provided, but is mounted to the cylinder 300 of the syringe 400 into which the chemical solution is injected. And can be applied to disposable insulin needles or disposable insulin syringes.

Specifically, the filter assembly 100 for a syringe includes a check valve 110 that regulates the suction and discharge of the chemical liquid, and a porous sintered filter 120.

The check valve 110 includes a shut-off film 111 and a coupling column 112, and controls the suction and discharge of the chemical liquid. The barrier film 111 is made of an elastic material so as to be able to contract by the pressure of sucking the chemical liquid, and may be made of a silicon material, for example.

The blocking film 111 has a head portion 111a and a wing portion 111b.

The head portion 111a is formed in a dome shape as shown in FIG. 3, and a first discharge hole 111c for discharging the chemical liquid is formed at the center. The first discharge hole 111c may be formed in a slit shape and may be opened or closed by the pressure at which the chemical liquid is discharged. In this embodiment, the first discharge hole 111c is formed in a 'one' shape as shown in FIG. 3, but may also be formed in a 'ten' shape.

In this embodiment, the head portion 111a is formed in a dome shape, but may be formed in various shapes such as a cone shape.

The wing portion 111b extends outward from the end portion of the head portion 111a and surrounds the head portion 111a. In this embodiment, the wing portion 111b is formed in the shape of a ring-like disk, but may be formed in a shape of a downward inclined downward from the central portion toward the end portion.

The liquid is temporarily contracted by the pressure at which the chemical liquid is sucked. As shown in FIG. 2, the wing portion 111b is disposed so that the end portion of the wing portion 111b is in contact with the inner surface of the needle portion 200. [

The coupling column 112 of the check valve 110 is formed integrally with the blocking film 111 by extending from the lower surface of the wing portion 111b of the blocking film 111 and has a hollow 112a are formed.

A sintered filter 120 is disposed under the check valve 110 and a sintered filter 120 has a filter 121 and a discharge pillar 122.

Specifically, the filter unit 121 is disposed facing the check valve 110 and facing the check valve 110. The filter unit 121 is formed in a disc shape. The filter unit 121 is contracted to the cylinder 300 side of the injector 400 Filter the foreign substance of the inhaled chemical liquid. The filter unit 121 is disposed so that its end portion is in contact with the inner surface of the needle unit 200 and blocks the filtered chemical solution and the filtered foreign matter from being mixed with each other. A second discharge hole 121a for discharging the filtered chemical liquid is formed in the center of the filter unit 121. [

The outlet column 122 extends from the upper surface of the filter section 121 and is formed integrally with the filter section 121 and is inserted into the coupling column 112 of the check valve 110 to connect the sintered filter 120 to the check valve 110 ).

1, the discharge column 122 is inserted into the coupling column 112 of the check valve 110 to be coupled with the coupling column 112, but may be extrapolated to the coupling column 112 You may.

The discharge column 122 has a through hole 122a communicating with the second discharge hole 121a and the chemical solution filtered by the filter unit 121 passes through the through hole 122a to the shielding film 111 side And is discharged through the first discharge hole 111a.

In particular, the sintered filter 120 of the present invention is formed by sintering the synthetic resin powders so that a plurality of filter holes 123 having various sizes and shapes as shown in FIG. 3 are formed in the sintered filter 120 do. Here, the filter hole 123 may be formed to have a size of about 0.1 μm to about 10 μm.

Thus, since the filter assembly 100 for a syringe according to the present invention includes the sintered filter 120 formed by sintering the fine particles, foreign matter in the chemical solution is filtered through only one sintered filter 120, . Thus, the syringe filter assembly 100 is easy to assemble and can reduce manufacturing costs.

Since the check valve 110 and the sintered filter 120 are coupled through the process of inserting the discharge column 122 of the sintered filter 120 into the coupling column 112 of the check valve 110, It is easy to mount the needle part 200 in the narrow space or the neck part 311 of the cylinder 300.

On the other hand, the filter assembly 100 is inserted into the needle part 200. As the inner diameter of the needle part 200 gradually increases from the upper part to the lower part, the lower part protrudes outward, so that the inner diameter of the lower part becomes sharply larger than that of the other part, and a step is formed on the inner wall due to this expansion. 2, the filter assembly 100 is positioned at a lower portion of the needle portion 200 whose inner diameter is suddenly expanded and the upper end surface of the wing portion 111b of the check valve 110 is positioned on the inner wall of the needle portion 200 So as to prevent the wing portion 111b from being turned upside down due to the pressure at which the chemical liquid is discharged during the discharge of the chemical liquid.

As shown in FIG. 2, a protrusion 220 for fixing the position of the filter assembly 100 may be formed on the inner wall of the needle part 200. When the filter assembly 100 and the needle unit 200 are assembled, the protrusion 220 is positioned on the upper surface of the filter unit 121 of the sinter filter 120, and the upper surface of the filter unit 121 is caught by the protrusion 220 Thereby guiding the position of the filter portion 121. Accordingly, the needle portion 200 can position the filter assembly 100 when the filter assembly 100 is inserted, thereby preventing the filter assembly 100 from being pushed up toward the upper region side of the needle portion 200 .

Here, the protrusions 220 may be formed in a dot shape, and may be provided in plural along the inner wall of the needle unit 200, or may be provided in a ring shape.

5 and 6, one or more drug solution guide grooves 230 may be formed on the inner wall of the needle part 200. As shown in FIG. 5, the drug solution guiding groove 230 extends in the longitudinal direction of the needle part 200 and guides the chemical solution into the syringe 400 when the chemical solution is injected into the filter assembly 100 side. As a result, the inflow of the chemical liquid injected into the injector 400 becomes more smooth, and the injection speed is increased.

The needle part 200 on which the filter assembly 100 is mounted is engaged with the cylinder 300. 2, the neck portion 311 of the cylinder 300 is inserted into the needle portion 200 to couple the needle portion 200 and the cylinder 300 together. At this time, the filter assembly 100 is positioned between the step formed on the inner wall of the needle part 200 and the neck part 311 of the cylinder 300.

Hereinafter, a process of filtering a chemical solution using the filter assembly 100 of the present invention will be described in detail with reference to the drawings.

FIG. 7 is a longitudinal sectional view showing a state in which the chemical solution is filtered by the filter assembly for a syringe shown in FIG. 1 and is sucked into the syringe, and FIG. 8 is a cross-sectional view showing the state in which the chemical solution filtered by the filter assembly for a syringe shown in FIG. Fig.

1 and 7, when the piston 320 of the cylinder 300 is pulled in order to suck the chemical solution 10 contained in the bayer or the ampule, the check valve 110 Is contracted while being inclined downwardly as shown in Fig. 5 by the pressure of sucking the chemical liquid 10. In this case, as shown in Fig. A space is formed between the inner surface of the needle portion 200 and the wing portion 111b and the chemical solution 20 flows between the wing portion 111b and the filter portion 121 through the space. When the suction of the chemical solution 10 is completed, the wing portion 111b expands again and the end portion of the wing portion 111b comes into contact with the inner surface of the needle portion 200. [

The foreign substance such as glass fragments or rubber fragments introduced together with the chemical solution 10 is sucked into the filter unit 121 through the filter unit 121. In this case, 121). As a result, the chemical liquid filtered by the foreign substance flows into the cylinder 300, and the foreign matter remains in the space between the filter unit 121 and the wing unit 111b, which is the outer space of the coupling column 112.

1 and 8, when the user presses the piston 320 of the syringe 400 to administer the filtered drug solution 20 to the patient, the filtered drug solution 20 in the cylinder 300 is pressurized by the pressure And then flows into the through hole 122a of the discharge column 122 through the second discharge hole 121a formed in the filter unit 121 of the sintered filter 120. [ The filtered chemical liquid 20 flows into the head portion 111a of the shielding film 111 through the through hole 122a and flows toward the needlepoint 210 side through the first discharge hole 111c formed in the head portion 111a . Here, the first discharge hole 111c is opened by the pressure at which the chemical liquid 20 is discharged.

6, the end portion of the wing portion 111b is kept in contact with the inner surface of the needle portion 200, so that the residual portion SS in the space SS formed between the wing portion 111b and the filter portion 121 The foreign matter 30 is blocked by the wing portion 111b and is not discharged to the outside.

Thus, since the filter assembly 100 for cyclic scavenging according to the present invention separates and separates the passageway for sucking the chemical solution and the passageway for discharging the chemical solution, the filtered chemical solution 20 is administered to the patient without the need to separate the filter assembly 100 And can prevent diseases that may occur due to the administration of the foreign substance 30.

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 in the appended claims. It will be possible.

100: syringe filter assembly 110: check valve
111: blocking film 112: coupling pole
120: sintering filter 121: filter section
122: Exhaust pillar

Claims

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A needle portion provided with a needle needle;
A cylinder coupled to the needle portion and having a storage space for storing a chemical solution sucked through the needle portion; And
And a filter assembly inserted in the needle portion to filter foreign substances of the chemical solution flowing into the cylinder,
The filter assembly includes:
And a hollow coupling column extending from the blocking membrane and communicating with the first discharge hole, wherein the first and the second discharge holes are formed in the first and second discharge holes, Check valve to adjust; And
And a porous sintered filter disposed below the check valve and coupled to the check valve to filter foreign substances of the chemical liquid that is sucked while the blocking membrane is contracted,
Wherein the sintered filter comprises:
Like filter portion formed with a plurality of filter holes and a second discharge hole formed at a central portion for filtering the foreign substance of the chemical solution sucked while the blocking film is contracted and discharging the filtered chemical solution; And
And a discharge pillar extending from the filter unit and fitted in the coupling column and having a through hole for communicating with the second discharge hole and discharging the filtered chemical solution to the blocking membrane side,
Wherein the sintered filter is formed by sintering synthetic resin powders,
The size of the filter hole is 0.1 탆 to 10 탆,
The blocking layer
A dome-shaped head portion having the first discharge hole formed therein; And
And a wing portion which extends outwardly from an end of the head portion and surrounds the head portion, faces the filter portion, and is contractible by a pressure at which the chemical solution is sucked,
The check valve is formed of a silicon material,
Wherein the first discharge hole is opened and closed by a pressure for discharging the chemical liquid,
Wherein,
Further comprising a protrusion formed to protrude from the inner wall of the needle portion and disposed to abut the upper end of the filter portion and to guide the position of the filter assembly to prevent the filter assembly from being pushed toward the upper region side of the needle portion,
Wherein the needle portion is formed on an inner wall of the needle portion so as to extend in the longitudinal direction of the needle portion and to allow the introduction of the drug solution smoothly.

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