KR20180056821A - Filter assembly for syringe - Google Patents

Abstract

The present invention relates to a syringe capable of collecting a foreign substance such as a glass piece when a chemical liquid of an ampule is filled with a syringe and a syringe capable of shutting off a part of the foreign substances collected in the filter when the chemical liquid of the syringe is discharged to the outside, A hub support tube fixed to the inner periphery of the coupling hub and having a chemical liquid transfer hole through which the chemical liquid moves along the circumferential direction; A porous filter provided on the upper portion of the hub support tube for collecting foreign substances of the chemical solution flowing into the syringe through the injection needle; And a valve member provided at a lower portion of the hub support pipe and interrupting the path of the chemical solution so that the chemical solution is moved only in one direction when the chemical solution flows into the syringe, It is possible to further improve the stability of the syringe by preventing the opening / closing slit from being opened by evenly distributing the pressure acting on the opening / closing body of the opening / closing body so that some of the foreign substances collected in the collecting space are discharged again to the outside through the opening / closing slit have.

Description

[0001] FILTER ASSEMBLY FOR SYRINGE [0002]

The present invention relates to a filter assembly used in a syringe. More particularly, the present invention relates to a filter assembly for collecting a foreign substance such as a piece of glass when a chemical liquid of an ampule is filled with a syringe, To a filter assembly for a syringe which can prevent a part of the foreign matter collected in the syringe from being discharged to the outside.

Generally, a syringe is used for administration to an infected patient, and a disposable syringe is mainly used to prevent the secondary infection from occurring during the injection process. Disposable syringes are used by mixing the liquid and powder or injecting the drug solution from the ampoule. Ampoules are mainly made of glass or plastic, and when the ampoule is opened, glass powder, plastic and other impurities are generated. If the drug is sucked into the syringe from the opened ampoule, the foreign substance is sucked at the same time as the drug solution, so that it does not have a function of filtering out these substances. As a result, the side effect is worried when the human body is injected.

In order to prevent such a problem, Japanese Patent No. 10-1247145 entitled " Safety Filter for Syringe and Syringe Using Syringe "has been disclosed.

1 is a schematic view showing a configuration of a syringe 10 to which a conventional filter 20 is coupled. As shown in the drawing, the conventional syringe 10 is provided with a filter 20 in the needle holder fixing member 13 to filter foreign substances such as glass powder when sucking the chemical solution into the cylinder 11 through the injection needle 15 . However, when the conventional filter assembly 20 is injected into the patient without replacement of the injection needle 15, the foreign substance attached to the filter 20 is injected into the patient as it is.

In addition, when the ampule fluid is filled with a syringe, the foreign substance such as a piece of glass is collected by the filter, and the valve is opened by the pressure acting on the valve for interrupting the flow of the chemical solution while the drug solution is being injected into the patient, Some of the foreign substances are injected into the patient again.

Therefore, at the medical site, a needle equipped with a filter is used for sucking and filling the chemical solution with a syringe, and when injecting the chemical solution after filling the chemical solution, the injection needle is replaced with a new one and then injected. Replacement of the injection needle every time the patient is injected is very troublesome, and there is a problem that the emergency patient can not be quickly coped with.

In addition, disposable syringes use a very large amount every day. As a plurality of needles are used at the time of one injection, the medical waste increases exponentially, adversely affecting the environment, and the treatment cost is increased.

Further, when injecting the drug solution into the patient using the injection needle equipped with the filter, the filter area of the injection needle inner filter is too narrow as compared with the syringe cylinder having a large space, so that the bottleneck of the drug solution occurs in the filter portion, . Therefore, since a great deal of force is applied to pressurize the piston to inject the drug solution into the patient, it is inconvenient for the medical staff and it is difficult to stably inject the drug solution.

KR 10-1247145 B1

An object of the present invention is to provide a syringe having a syringe which is filled with a chemical solution while filtering a foreign substance such as a glass piece with a syringe and is further prevented from being injected into a patient, And a filter assembly.

Another object of the present invention is to provide a filter assembly for a syringe which improves safety by filtering foreign matter introduced from a needle through a second order.

It is another object of the present invention to provide a syringe filter assembly capable of collecting foreign matter in a separate collection space and injecting a drug solution into a patient without replacing the injection needle with a new one.

It is still another object of the present invention to provide a syringe filter assembly capable of injecting a drug solution with a small force when a drug solution is injected into a patient, because the drug solution moves without passing through a filter.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The present invention relates to a filter assembly inserted into a coupling hub for coupling a needle to a syringe and filtering out foreign substances contained in a chemical solution, the filter assembly being fixed to an inner periphery of the coupling hub, A hub supporting tube provided; A porous filter provided at an upper portion of the hub support pipe to collect foreign substances of a chemical solution flowing into the syringe through the injection needle; And a valve member provided at a lower portion of the hub support tube and interrupting a movement path of the chemical solution so that the chemical solution is moved only in one direction when the chemical solution flows into the syringe, A cylindrical filter leg which is formed to have a predetermined length along the axial direction of the filter leg and which is opened to insert the valve member, and a collecting space for collecting foreign matter between the filter leg and the upper part of the filter leg And a filter cap, wherein the hub support tube has a fixing post fixed to the inner periphery of the coupling shoulder with an outer periphery, an outer periphery protruding upward from the fixing post, fixed to the inner periphery of the filter leg, Wherein the valve member includes a support post having a valve insertion hole into which the valve member can be inserted, A valve body having a central portion formed with an opening / closing slit that is opened and closed by a moving pressure of the chemical liquid; a cylindrical valve body having a predetermined length along the axial direction of the opening / And a valve skirt extending in a radially outward direction from the lower end of the valve leg to correspond to the inner diameter of the coupling hub and elastically moving upward and downward by the moving pressure of the chemical solution and controlling the moving direction of the chemical solution Wherein the opening / closing body is located at a position higher than the upper end of the support column and is located in the trapping space so as to be separated from the inner surface of the filter cap.

Here, the filter cap of the present invention is characterized in that its upper surface is formed to be convex toward the syringe.

The valve member of the present invention is made of a silicon material and has a hardness of 15 to 50. [

In the meantime, the outer diameter of the filter leg of the present invention is smaller than the inner diameter of the coupling hub, and a path for moving the chemical solution between the filter leg and the coupling hub is formed.

The inner diameter of the filter leg of the present invention is formed to correspond to the outer diameter of the support column.

Further, the outer diameter of the valve leg of the present invention is formed to correspond to the inner diameter of the support column.

According to another aspect of the present invention, there is provided a needle assembly including a cylinder having a needle coupling tube at its tip end and containing a chemical liquid, a piston which moves inside the cylinder and forms a pressure to inject or inject the chemical into or out of the cylinder, And a filter assembly according to any one of claims 1 to 6 inserted into the needle.

According to another aspect of the present invention, there is provided a ringer comprising: a ringer main body accommodating a ringer fluid; a ringer string coupled to the ringer main body; a ringer needle coupled to an end of the ringer rod to discharge the ringer fluid; Characterized in that it comprises a filter assembly according to any one of claims 1 to 6.

The filter assembly for a syringe according to the present invention diffuses the pressure acting on the opening / closing body of the valve member evenly when the chemical liquid is discharged to the outside by the syringe, thereby preventing the opening / closing slit from being opened, The safety of the syringe can be further improved by blocking the source from being discharged back to the outside through the slit.

In addition, the filter assembly for a syringe filters the foreign substances by the valve member, and the foreign matter is filtered by the porous filter to improve the safety. In addition, since the porous filter has a closed structure having a trapping space, when the foreign substance is trapped in the trapping space and the drug solution is injected into the patient, it is possible to prevent foreign matter from re-contaminating the drug solution.

As a result, the suction and the injection of the chemical solution can be simultaneously performed through the single injection needle, thereby reducing the inconvenience of the medical staff and the processing cost of the injection needle.

In addition, the porous filter is formed to be smaller in diameter than the inner wall of the coupling hub, and the chemical liquid is directly moved through the path between the coupling hub and the porous filter, so that the medical staff can inject the chemical liquid with less force.

1 is a schematic view showing a configuration of a syringe having a conventional filter;
FIG. 2 is an exploded perspective view showing a process in which a filter assembly for a syringe according to the present invention is coupled to a syringe. FIG.
FIG. 3 is an exploded perspective view of the filter assembly for a syringe according to the present invention. FIG.
4 is an exemplary view showing a process in which a chemical solution is injected into a syringe through the filter assembly for a syringe of the present invention.
FIG. 5 is an exemplary view showing a process in which a chemical liquid is discharged from a syringe to a needle through a filter assembly for a syringe of the present invention. FIG.
6 is a perspective view showing the configuration of a ringer assembly to which the filter assembly of the present invention is coupled;

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

FIG. 2 is a perspective view illustrating a process in which the filter assembly 100 according to the present invention is coupled to the syringe 200, and FIG. 3 is an exploded perspective view of the filter assembly 100 according to the present invention.

The filter assembly 100 according to the present invention is inserted into the injection needle 230 of the syringe 200 and used. The syringe 200 includes a cylinder 210 having a receiving space in which a chemical solution is received, a piston 220 which moves upward and downward along the inner wall surface of the cylinder 210 to form a pressure at which a chemical solution is introduced or discharged, 210). ≪ / RTI >

A needle coupling tube 211 to which the injection needle 230 is coupled is formed at a distal end of the cylinder 210. The piston 220 moves to the upper portion of the cylinder 210 and forms a negative pressure in the cylinder 210 so that the needle body 235 receives the chemical solution from the ampule A. [ The piston 220 moves downward from the upper portion of the cylinder 210 and allows the chemical liquid F inside the cylinder 210 to be discharged to the patient through the injection needle 230.

The injection needle 230 includes a needle body 235, a coupling hub 231 for supporting the needle body 235, a cylinder coupling pipe (not shown) extending from the coupling hub 231 and coupled to the needle coupling tube 211 233). The filter assembly 100 of the present invention is inserted and disposed inside the coupling hub 231.

The filter assembly 100 may be manufactured while being inserted into the needle 230 or may be inserted into the needle 230 when the doctor injects the patient through the injector 200. [

The filter assembly 100 is inserted into the injection needle 230 to collect foreign matter W contained in the chemical solution F when the chemical solution F flows into the syringe 200 from the ampule A Thereby preventing the foreign matter W from flowing into the syringe 200. The filter assembly 100 collects the foreign substance W in the trapping space 135 when the drug solution F in the injector 200 is injected into the patient and moves only the drug solution F to the injection needle 230 .

The filter assembly 100 includes a hub support tube 110 fixed to the inner periphery of the coupling hub 231 of the injection needle 230 as shown in FIGS. 3 and 4, And a porous filter 130 provided at an upper portion of the valve member 120 to filter the foreign matter W. The valve member 120 includes a valve member 120,

The hub support tube 110 is fixed to the inner periphery of the coupling hub 231 so that the porous filter 130 is fixed on the upper portion and supports the valve member 120 to operate stably in the hub support tube 110 . The hub support tube 110 forms a discharge path for the chemical liquid F to smoothly move the chemical liquid F flowing into the cylinder 210 toward the needle body 235 side.

The hub support tube 110 includes a fixed column 111 having a ring shape and having an outer periphery fixed to the inner periphery of the coupling hub 231 and a vertical column 111 formed vertically through the fixed column 111, A plurality of medicaments forming the pores 113 include the pores 113. Here, the diameter of the fixing post 111 corresponds to the diameter of the coupling hub 231. So that the fixing post 111 can be fixed to the inner periphery of the coupling hub 231.

5, the drug solution F moves to the needle body 235 when the drug solution F of the injector 200 is injected into the patient. Guide. The pores 113 of the chemical solution are formed at least at two positions so as to be conformal to the fixing pillars 111 formed in a circular shape as shown in FIG. In the preferred embodiment of the present invention, the chemical solution is shown to have four pores 113 formed at equal angles, but this is only an example, and the number of pores 113 can be increased or decreased.

A support column 115 protrudes from the center of the fixed column 111 and a valve insertion hole 117 through which the valve member 120 can be inserted is formed at the center of the support column 115. The outer periphery of the support column 115 is formed to have a diameter corresponding to the inner periphery of the filter leg 131 of the porous filter 130. The inner peripheral bottom portion of the filter leg 131 is fixed to the outer periphery of the support column 115. So that the porous filter 130 can be secured to the hub support tube 110.

The lower part of the filter leg 131 is fixed to the support column 115 and the lower end of the filter leg 131 is fixed to the lower end of the fixing column 111. [ Or fixed in a state spaced apart from the upper surface of the fixing post 111.

A valve insertion hole 117 is formed at the center of the support column 115. A valve member 120 is inserted into the valve insertion hole 117. At this time, the valve insertion hole 117 is formed to have a diameter corresponding to the valve leg 125 of the valve member 120.

The inside of the upper surface of the valve skirt 123 is fixed to the lower surface of the fixed column 111 at the center side in a state where the valve member 120 is inserted into the valve insertion hole 117, 110).

The valve member 120 is inserted into the hub support tube 110 to interlock the moving direction of the chemical liquid F so that the chemical liquid F is moved only in one direction. 4, when the chemical liquid F is supplied from the ampoule A to the syringe 200, the valve member 120 is moved in the moving direction so that the chemical liquid F is moved only in the direction passing through the porous filter 130, . As shown in FIG. 5, when the chemical solution F is injected from the syringe 200 to the patient, the movement direction is adjusted so as to move along the moving path a without passing through the porous filter 130.

The valve member 120 includes an opening and closing main body 121 inserted into the trapping space 135 of the porous filter 130 and a valve body 120 extending vertically along the axial direction outside the opening and closing body 121, And a valve skirt 123 formed to extend radially from the lower end of the valve leg 125. The valve leg 125 has a generally cylindrical shape.

At this time, the valve member 120 is made of an elastic material such as rubber or silicon. The valve member 120 is integrally manufactured by injection molding or the like with the opening and closing main body 121, the valve leg 125 and the valve skirt 123.

In a preferred embodiment of the present invention, the valve member 120 is made of a silicone material and has a hardness of 15 to 50. [ When the hardness of the valve member 120 is less than 15, it is difficult to form the valve member 120 in the form of the valve member 120 because the hardness of silicon is too small. When the hardness of the valve member 120 is more than 50, Closing slit 121a formed in the middle region of the opening / closing body 121 when the chemical liquid F is moved toward the syringe 200 and the time when the user sucks the chemical liquid F into the syringe 200 is excessive And there is a problem that a lot of power is required.

The opening / closing body 121 is formed in a symmetrical shape with its upper surface protruding in an upward direction, such as an ellipse, hemisphere, triangle, or polygon. Whereby the pressure of the chemical liquid F is concentrated on the protruding portion in the middle as the chemical liquid F is moved toward the syringe 200 side.

Closing slits 121a are formed in a central area of the opening / closing main body 121 in one or more directions. When the pressure of the chemical liquid F is concentrated, the opening / closing slit 121a is spread by the pressure and the chemical liquid F is moved.

Since the open / close body 121 protrudes upward, when the chemical liquid F is moved in the direction of being discharged to the needle body 235 and the upper part of the open / close body 121 is pressed, The opening / closing slit 121a is not opened. Accordingly, the opening / closing body 121 has a directionality that is opened only in the direction in which the chemical liquid F is supplied from the needle body 235 to the cylinder 210.

However, when the upper portion of the opening / closing body 121 is pressed while the chemical liquid F is moving in the direction of being discharged to the needle body 235, pressure is also applied to the valve leg 125 whose pressure is the side of the opening / closing body 121 A part of the foreign matter W collected in the trapping space 135 of the porous filter 130 can be discharged to the bar body 236 by the open / close slit 121a.

In order to prevent this, the opening / closing body 121 is inserted into the valve insertion hole 117 formed in the supporting column 115 of the hub supporting tube 110 toward the syringe 200 side. In this state, the inner peripheral edge of the support column 115 supports the outer periphery of the valve leg 125.

Since the porous filter 130 is disposed on the upper portion of the hub support pipe 110, the opening and closing body 121 is located in the trapping space 135 of the porous filter 130 while being inserted into the valve insertion hole 117 .

At this time, the opening / closing main body 121 is located at a position higher than the upper end of the support column 115 and is located inside the trapping space 135, but is separated from the inner surface of the filter gap 133 of the porous filter 130 .

When the upper part of the opening / closing main body 121 is pressed, the upper part of the opening / closing body 121 and the coupling hub 231 of the hub supporting tube 110 and the valve member 120, i.e., the injection needle 230, The opening and closing slit 121a is not opened and the opening and closing main body 121 is opened only in the direction in which the chemical liquid F is supplied from the needle body 235 to the cylinder 210, Closing of the opening / closing slit 121a of the opening / closing body 121 during the movement in the direction of discharging the needle body F to the needle body 235.

In other words, The chemical liquid F flows into the syringe 200 while filtering the foreign matter W from the needle body 235 through the trapping space 135 of the valve member 120 and the porous filter 130, Closing the slit 121a of the opening / closing body 121 when the syringe 200 is discharged from the syringe 200 to the needle body 235, do. Thus, it is possible to prevent the foreign material W collected in the trapping space 135 of the porous filter 130 from being injected into the patient.

The valve skirt 123 extends radially outward from the lower end lower region of the valve leg 125. The diameter of the valve skirt 123 corresponds to the inner diameter r1 of the coupling hub 231 and is smaller than the diameter of the hub support tube 110 and larger than the diameter of the porous filter 130. That is, the outer end 123a of the valve skirt 123 is formed to be spaced apart from the inner wall surface of the coupling portion 231 as shown in FIG.

The valve skirt 123 is formed so as to have a smaller thickness from the central region to the outer region. Whereby the valve skirt 123 can be elastically moved up and down by an external force. The valve skirt 123 is subjected to an elastic force so as to maintain a horizontal state in an initial state in which the pressure of the chemical liquid F is not applied.

4, when the chemical liquid F flows into the syringe 200 from the ampule A, the valve skirt 123 moves outward from the lower side to the upper side with respect to the chemical liquid F, The end portion 123a receives pressure in a direction perpendicular to the outer wall surface of the coupling hub 231. [ Whereby the valve skirt 123 shields the moving path a so that the chemical liquid F can be moved only through the valve member 120 without flowing into the syringe 200 through the moving path a.

5, when the chemical liquid F is discharged from the syringe 200 to the needle body 235, the chemical liquid F that moves through the transfer path a is moved from the upper part to the lower part, And moves the outer end 123a of the second arm 123 downward. As a result, the outer end 123a is separated from the lower portion of the hub supporting tube 110, and the chemical solution opens the pores 113. [ Therefore, the chemical liquid F can be transferred to the needle body 235 through the transfer path (a) without passing through the porous filter 130.

On the other hand, when the chemical liquid F flows into the syringe 200 from the needle body 235 through the valve member 120, it can be moved only through the opening / closing slit 121a of the opening / closing body 121, Is not allowed to pass through the opening / closing slit 121a, and is left in the valve member 120. [0051] As shown in FIG. So that the understanding foreign matter W is firstly filtered by the valve member 120.

The porous filter 130 filters the foreign substance W contained in the chemical solution F by the secondary filter while moving the chemical solution F via the valve member 120 to the syringe 200 side, Collect.

The porous filter 130 is located at the top of the hub support tube 110. The porous filter 130 is formed of a porous member having a plurality of holes through which the chemical liquid F can pass. The porous filter 130 has a structure in which a filter leg 131 disposed toward the longitudinal direction of the coupling hub 231 and a filter cap 133 covering the upper portion of the filter leg 131 are integrally coupled.

A trapping space 135 in which foreign matter W is trapped is formed in the filter leg 131. The opening / closing body 121 is inserted into the lower part of the collecting space 135.

The inner periphery of the filter leg 131 is fixed to the outer peripheral lower portion of the support column 115 of the hub support tube 110. At this time, the fixing method uses an adhesive method, a high frequency adhesive method, or the like.

The filter leg 131 is formed with a diameter r2 whose outer diameter is smaller than the inner diameter r1 of the coupling hub 231. [ Thus, a traveling path (a) is formed between the coupling hub 231 and the filter leg 131. The medicinal liquid F of the syringe 200 is moved through the moving path a without passing through the porous filter 130 when the medicinal liquid F is injected into the patient, Can be injected.

The filter cap 133 covers and hermetically closes the upper portion of the filter leg 131. Whereby the trapping space 135 has a sealing structure in which the lower portion is blocked by the valve member 120 and the upper portion is blocked by the filter cap 133. The foreign matter W contained in the trapping space 135 is trapped in the trapping space 135 by the closed structure and does not contaminate the drug solution F when the drug solution F is injected into the patient. Therefore, during the injection of the conventional chemical liquid F, the suction and the injection of the chemical liquid F can be performed simultaneously with the single injection needle 230 without a process of replacing with the new injection needle.

The upper portion of the filter cap 133 is preferably formed in an upward convex shape so as not to affect the flow of the chemical liquid during the inflow and outflow of the chemical liquid. However, this is only an embodiment and may be formed in a flat shape, an angled shape, a flat shape, a sharp shape, a triangular shape, a square shape and a polygonal shape.

The chemical liquid suction process and the chemical liquid scanning process of the syringe 200 having the filter assembly 100 according to the present invention having such a configuration will be described with reference to FIGS. 2 to 5. FIG.

First, the filter assembly 100 is inserted into the coupling hub 231 of the injection needle 230. The medical staff engages in a fit-fit manner so that the hub support tube 110 of the filter assembly 100 can be seated on the coupling hub 231, as shown in FIG. At this time, the filter assembly 100 may be assembled on the coupling hub 231 in advance in the manufacturing process of the injector 200.

 When insertion of the filter assembly 100 is completed, the injection needle 230 is coupled to the needle coupling tube 211 of the cylinder 210.

The ampule A containing the drug solution F is opened and the needle body 235 is inserted into the ampule A as shown in Fig. When the piston 220 of the syringe 200 is pulled backward, a negative pressure is formed inside the cylinder 210, and the chemical liquid F is sucked through the needle body 235.

The chemical liquid F flowing along the needle body 235 is transferred to the hub supporting tube 110. [ The chemical liquid F in which the chemical solution of the hub support tube 110 is moved to both sides of the coupling hub 231 of the chemical liquid F moved along the pupil 115 presses the valve skirt 123 upward do. Whereby the valve skirt 123 is horizontally disposed and the outer end 123a is in contact with the fixing post 111 of the hub supporting tube 110 and the chemical liquid blocks the pupil 115. [ Thereby shielding the traveling path (a).

The chemical liquid F can not move to the moving path a which is shielded by the valve skirt 123 and flows into the opening / closing main body 121. The chemical liquid F flowing into the opening / closing body 121 is concentrated in the central region formed to be convex to the upper portion of the opening / closing body 121, and the opening / closing slit 121a is opened by the concentrated pressure. The chemical liquid F is moved to the porous filter 130 side through the opened open / close slit 121a.

In this process, the foreign matter W larger than the size of the opening / closing slit 121a is firstly filtered to remain inside the opening / closing body 121. The chemical liquid F transferred to the porous filter 130 is moved toward the cylinder 210 via the porous filter 130 and is secondarily filtered. At this time, since the porous filter 130 has a closed shape by the filter cap 133, the foreign matter W larger than the hole of the porous filter 130 is collected in the trapping space 135. The chemical liquid F in which the foreign matter W is caught through the porous filter 130 through the second order is received in the cylinder 210. [

Meanwhile, when injecting the drug solution F into the cylinder 210, the piston 220 is pressed to discharge the drug solution F to the injection needle 230. As shown in FIG. 5, the chemical liquid F flowing into the coupling hub 231 is moved to the porous filter 130 and the traveling path (a). At this time, the chemical liquid F is moved through the transfer path a spaced between the filter leg 131 and the coupling hub 231 to press the valve skirt 123 downward.

The outer end 123a of the valve skirt 123 is moved downward by the moving pressure of the chemical liquid F so that the chemical solution of the hub supporting tube 110 opens the hole 113 and the transfer path a is opened, F are moved to the needle body 235. [

The foreign matter W is not trapped in the trapping space 135 and therefore the foreign matter W is not moved to the needle body 235 when the chemical liquid F is moved to the needle body 235. [

Therefore, it is possible to inject the secondarily filtered drug solution to the patient without separately replacing with a new needle.

As described above, when the chemical liquid F is discharged to the injection needle 230, pressure is applied to the entire porous filter 130, the valve member 120 and the hub supporting tube 110, and the valve member 120 Closing slit 121a formed in the opening and closing main body 121 of the valve member 120 is opened and the valve stem 125 of the hub supporting tube 110 is opened and closed in the trapping space 135 It is possible to prevent a part of the collected foreign matter W from being moved to the needle body 235 again.

Meanwhile, the filter assembly 100 according to the present invention may be used in combination with the syringe 200 as shown in FIG. 2, or may be used in combination with the ringer assembly 300 as shown in FIG.

The ringer assembly 300 includes a ringer main body 310 in which the ringer liquid is received, a ringer string 320 connected to the ringer main body 310, and a ringer connector tube 321 formed at an end of the ringer string 320 And a ringer needle 330 for injecting Ringer's solution into the patient. The filter assembly 100 according to the present invention is inserted into the inside of the ringer needle engagement member 331 to filter foreign matters contained in the ringer solution.

As described above, the filter assembly according to the present invention is inserted into the needle to block foreign substances contained in the chemical liquid from flowing into the syringe when the ampule is opened.

In addition, when the chemical liquid is discharged to the outside by the syringe, the pressure acting on the opening / closing body of the valve member is evenly dispersed to prevent the opening / closing slit from being opened so that some of the foreign substances collected in the trapping space are discharged again through the opening / The stability of the syringe can be further improved.

Particularly, the filter assembly can primarily filter the foreign matter by the valve member, and can remove the foreign matter by the porous filter, thereby enhancing safety. In addition, since the porous filter has a closed structure, when the foreign substance is collected in the inside, and the chemical solution is injected into the patient, it is possible to prevent foreign matter from re-contaminating the chemical solution.

As a result, the suction and the injection of the chemical solution can be simultaneously performed through the single injection needle, thereby reducing the inconvenience of the medical staff and the processing cost of the injection needle.

In addition, the porous filter is formed to be smaller in diameter than the inner wall of the coupling hub, and the chemical liquid is directly moved through the path between the coupling hub and the porous filter, so that the medical staff can inject the chemical liquid with less force.

The embodiments of the filter assembly of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. There will be. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: Filter assembly
110: Hub support tube
111: fixed column 113:
115: support column 117: valve insertion hole
120: valve member
121: opening and closing body 121a: opening and closing slit 123: valve skirt
123a: Outside end 125: Valve leg
130: Porous filter
131: filter leg 133: filter cap 135: trapping space
200: Syringe
210: cylinder 211: needle coupling tube
220: Piston
230: Needle
231: coupling hub 233: cylinder coupling tube 235: needle body
300: Ringer assembly
310: Ringer main body
320: ringer line 321: ringer connector
330: Ringer needle 331: Ringer needle coupling member

Claims (8)

1. A filter assembly inserted into a coupling hub for coupling a needle to a syringe to filter foreign substances contained in a chemical solution,

A hub support pipe fixed to the inner periphery of the coupling hub and having a chemical liquid transfer hole through which the chemical liquid moves along the circumferential direction;
A porous filter provided at an upper portion of the hub support pipe to collect foreign substances of a chemical solution flowing into the syringe through the injection needle; And
And a valve member provided at a lower portion of the hub support tube and interrupting a movement path of the chemical solution so that the chemical solution moves only in one direction when the chemical solution flows into the syringe,

Wherein the porous filter is formed to have a predetermined length along the axial direction of the coupling hub and the lower part is formed with a cylindrical filter leg which is opened to insert the valve member and an upper part of the filter leg is closed, And a filter cap forming a collecting space to be collected,
Wherein the hub support tube has a fixing post fixed to the inner periphery of the coupling shoulder and an outer periphery protruding upward in the fixing post, the outer periphery being fixed to the inner circumference of the filter leg, Wherein the valve support member includes:
Wherein the valve member is inserted into the trapping space of the filter leg and has an opening / closing slit formed in a center region thereof to be opened / closed by a moving pressure of the chemical liquid, a fixed length along the axial direction of the opening / closing body, A valve leg extending radially outwardly from the lower end of the valve leg to correspond to an inner diameter of the coupling hub and being elastically moved up and down by a moving pressure of the chemical liquid, And a valve skirt for interrupting the moving direction of the valve,

Wherein the opening / closing body is located at a position higher than the upper end of the support column and is located in the trapping space so as to be separated from the inner surface of the filter cap.
The method according to claim 1,
Wherein the filter cap is formed with an upper surface convex toward the syringe.
The method according to claim 1,
Wherein the valve member is made of a silicone material and has a hardness of from 15 to 50.
3. The method of claim 2,
Wherein an outer diameter of the filter leg is smaller than an inner diameter of the coupling hub, and a path is formed between the filter leg and the coupling hub to move the chemical solution.
3. The method of claim 2,
Wherein an inner diameter of the filter leg is formed to correspond to an outer diameter of the support column.
3. The method of claim 2,
Wherein an outer diameter of the valve leg is formed to correspond to an inner diameter of the support column.
A cylinder having a needle coupling tube at its tip end and containing a chemical liquid; a piston which moves in the cylinder and forms a pressure for injecting or discharging the chemical liquid into or out of the cylinder; an injection needle coupled to the needle coupling tube; And a filter assembly according to any one of claims 1 to 6 inserted into the needle.
A ringer needle coupled to the end of the ringer rod for discharging the ringer fluid; and a ringer needle inserted between the ringer needle and the ringer needle, ≪ / RTI > wherein the filter assembly comprises a filter assembly of any one of the claims.

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