WO2019199060A1

WO2019199060A1 - Filter assembly for syringe and syringe having same

Info

Publication number: WO2019199060A1
Application number: PCT/KR2019/004291
Authority: WO
Inventors: 김종윤
Original assignee: 주식회사 이수테크
Priority date: 2018-04-10
Filing date: 2019-04-10
Publication date: 2019-10-17
Also published as: KR20200125726A; KR101890601B1

Abstract

The present invention relates to a syringe and, more specifically, to a filter assembly for a syringe, which is configured to remove alien substances inside an injection fluid, and a syringe having same. Disclosed is a filter assembly for a syringe, which is mounted between a hub (5) for holding an injection needle (4) and a neck portion (3) of a syringe cylinder (2) so as to filter out alien substances from the discharged injection fluid, the filter assembly being characterized by comprising: a housing (100) having a hub connecting portion (110) formed on one end thereof such that the hub (5) is coupled thereto, the neck portion (3) of the cylinder (2) being coupled to the other end of the housing (100); a first valve member (300) having a discharge opening (311) formed through one end thereof such that the injection fluid is discharged from the cylinder (2), the outer peripheral surface of the first valve member (300) forming a suction channel (301) together with the inner peripheral surface of the housing (100) such that the injection fluid is suctioned through the hub connecting portion (110), the first valve member (300) being configured such that, when the injection fluid from the cylinder (2) is discharged through the discharge opening (311), discharge of the injection fluid through the suction channel (301) is blocked; a filter (200) inserted into the other end of the first valve member (300) so as to filter out alien substances from the injection fluid when the injection fluid is discharged through the discharge opening (311); and a second valve member (400) installed in the housing (100) to be able to move in the longitudinal direction such that same opens/closes the discharge opening (311) by moving according to the pressure of the injection fluid, thereby preventing the injection fluid from being suctioned through the discharge opening (311) when the injection fluid is suctioned through the suction channel (301).

Description

Syringe filter assembly and syringe having same

The present invention relates to a syringe, and more particularly, to a filter assembly for a syringe for removing foreign substances in a chemical liquid and a syringe having the same.

In general, the drug solution to be administered to the patient is distributed in ampoules made of glass or vials packed with glass vials. The chemical solution in the ampoule or vial is administered to the patient by using a syringe. Glass fragments generated by opening the ampoule or rubber fragments generated from the rubber stopper of the vial are introduced into the syringe during the suction of the chemical solution into the syringe.

The glass fragments or rubber fragments introduced into the syringe may be administered to the patient together with the drug solution to cause complications. In particular, intravenous administration may cause phlebitis, or in the case of spinal cord injection, may cause necrosis of body tissues. May be severe and develop cancer.

In order to prevent this, recently, the use of a syringe filter is recommended, and as an example of such a filter-type syringe, referring to Korean Patent No. 10-1354451, a filter body is attached to the tip of a cylinder of a syringe body to provide a chemical solution. As the invention for removing foreign matters, in this case, in order to mount the filter body at the tip of the cylinder of the syringe body having a narrow inner area, it is necessary to make the filter body ultra-miniaturized, thereby increasing the cost and making it difficult to precisely manufacture the filter body.

In addition, since the injection pressure increases during injection due to the miniaturization of the filter body, a large amount of force is applied to pressurize the piston to inject the medicine into the patient, causing inconvenience to the medical staff, and insufficient function of the check valve.

On the other hand, Korean Patent No. 10-1723820 discloses a filter structure which is configured on one side of a syringe body cylinder to catch foreign substances contained in the injection liquid, but in this case, the filter structure is formed inside the cylinder and is disposable. The bar has to be manufactured in accordance with various cylinder sizes of the syringe, there is a problem that the general purpose and the manufacturing cost increases.

In addition, in the case of a filter needle having a filter formed on the needle itself, it is necessary to use both a filter needle for injecting a drug into a syringe and a dispensing needle for administering a drug to a human body. Or if there is a problem in that the foreign substance is used as it is administered to the patient when using the filter needle without replacing the needle for administration because of the illusion.

An object of the present invention, in order to solve the above problems, to provide a filter assembly for a syringe for removing foreign substances in the chemical liquid and a syringe having the same.

The present invention was created in order to achieve the object of the present invention as described above, the present invention is mounted between the neck (3) of the needle 5 and the syringe cylinder (2) for fixing the needle (4) In the filter assembly for a syringe for filtering foreign substances of the chemical liquid discharged, an impregnation connecting portion 110 to which the needle 5 is coupled is formed at one end, and the neck portion 3 of the cylinder 2 is formed at the other end. A housing 100 coupled; A discharge opening 311 through which the chemical liquid is discharged from the cylinder 2 is formed at one end thereof, and an outer circumferential surface of the suction passage 301 in which the chemical liquid is sucked through the infiltration connector 110 together with the inner circumferential surface of the housing 100. A first valve member (300) formed to block the discharge of the chemical liquid through the suction passage (301) when the chemical liquid from the cylinder (2) is discharged through the discharge opening (311); A filter 200 inserted into the other end of the first valve member 300 to filter foreign substances from the chemical liquid when the chemical liquid is discharged through the discharge opening 311; It is installed to be movable in the longitudinal direction in the housing 100, by opening and closing the discharge opening 311 through the movement according to the pressure of the chemical liquid, the discharge opening 311 when the chemical liquid is sucked through the suction flow path 301 Disclosed is a filter assembly for a syringe, characterized in that it comprises a second valve member (400) for blocking the suction of the chemical through.

The housing 100 includes a housing body 120 extended to the needle connecting portion 110 to have a step 121 to extend in the radial direction of the needle connecting portion 110, the needle connecting portion 110 ), Is inserted into the acupuncture (5), a hollow 111 through which the chemical solution in the longitudinal direction may be formed.

The first valve member 300, the main body 310, the discharge opening 311 is formed, and is formed to extend inclined toward the neck portion 3 from the main body 310, when the chemical liquid discharged By being in close contact with the inner surface of the housing 100 by the pressure of the chemical liquid, it may include a wing 320 to block the suction flow path 301 to prevent the discharge of the chemical liquid.

The main body 310 is formed so that the filter insertion hole 312 is extended from the discharge opening 311 with a step so that the filter 200 is inserted, the filter 200, the filter insertion It is inserted into the hole 312, it is possible to filter the foreign matter when the chemical liquid discharged.

The second valve member 400 has a protrusion 410 which is installed to correspond to the hollow 111 so as to be movable along the hollow 111, and extends in a radial direction from the protrusion 410. It may include a contact portion 420 having a larger diameter than the discharge opening 310 to open and close the discharge opening 311 according to the movement of the protrusion 410 according to the pressure of the chemical liquid.

The hollow 111, the diameter of the side of the needle 5 is tapered shape smaller than the diameter of the housing body 120 side, the protrusion 410 is spaced apart from the inner surface of the needle connecting portion 110, It may have a tapered shape corresponding to the hollow 111.

When the outer diameter of the lower end of the protrusion 410 is D ₂ , and the inner diameter of the lower end of the hollow 111 is D ₁ , D ₂ / D ₁ may be 0.169 or more and less than 1.000.

When the length of the protrusion 410 is L _1, and the length of the hollow 111 is L ₂ , the length of the protrusion 410 may be 0.294 or more and 1.177 or less.

When the outer diameter of the lower end of the protruding portion 410 is D _2, and the outer diameter of the close contact portion 420 is D ₃ , D ₂ / D ₃ may be 0.144 or more and less than 1.000.

When the inner diameter of the lower end of the hollow 111 is D ₁ , and the outer diameter of the close contact portion 420 is D ₃ , D ₁ / D ₃ may be 0.269 or more and less than 1.000.

The housing body 120 may have a flow path groove 122 formed in the step 121 to form a flow path through which the chemical liquid is discharged when the step 121 and the second valve member 400 contact each other. have.

The second valve member 400 may be connected to the step 121 of the main body 420 to form a flow path through which the chemical liquid is discharged even when the step 121 is in contact with the second valve member 400. One or more protrusions may be formed on the contact surface.

The housing 100 has one end coupled to the housing body 120 so that the housing 100 is positioned between the needle 5 and the neck 3, and the other end of the housing 100 is connected to the neck 3. The adapter 500 may be further included.

The adapter 500 may be connected to the adapter 500 to form at least one opening 510 for the passage of the chemical liquid, and a flow path 523 connected to the opening 510 from the suction passage 301. The filter 200 may include one or more protrusion contact parts 520 protruding from and contacting the filter 200 so as to be spaced apart from each other.

The adapter 500 may include an extension protrusion 530 inserted into the neck part 3 in order to minimize the remaining chemical solution of the neck part 3.

Acupuncture (5) for fixing the needle (4) to be inserted into the drug solution subject; A cylinder (2) in which the chemical liquid is accommodated by using a pressure difference through the movement of the rod (6) to which the intake (7) is coupled to one end; Disclosed is a syringe assembly characterized in that the filter assembly for a syringe according to any one of claims 1 to 13 is mounted between the needle 5 and the cylinder 2.

In order to minimize the remaining chemical liquid in the neck portion 3 of the cylinder 2, the intake 7 in the cylinder 2 protrudes in the longitudinal direction of the cylinder 2, When moving forward may include a chemical removal unit inserted into the neck (3).

The filter assembly for a syringe according to the present invention and a syringe having the same can prevent diseases such as sepsis, tissue necrosis, phlebitis, and blood clots due to the incorporation of human body such as glass powder by filtering foreign substances contained in the drug solution administered to the human body. There is an advantage to that.

In addition, the filter assembly for a syringe according to the present invention and a syringe having the same, can be used as such without the need to replace the needle in the process of inhaling the drug solution into the syringe, and in the process of administering the drug solution sucked into the human body Bar, there is an advantage that the convenience of use of the medical staff is increased.

In addition, the syringe filter assembly and the syringe having the same according to the present invention is formed to be mounted corresponding to the size and shape of the tip mounting portion of the standardized syringe tip and the needle, can be used in a variety of disposable syringes and low production cost There is an advantage.

On the other hand, the syringe filter assembly and the syringe having the same according to the present invention, because the size of the filter is inserted into the syringe, or larger than the filter configured in the acupuncture, there is an advantage that the administration of the drug solution with a low pressure.

In addition, the syringe filter assembly and the syringe having the same according to the present invention can minimize the amount of residual drug that can remain at the tip of the syringe according to an embodiment of the medical care, such as infants need precise dosage control There is an advantage to enhance the effect.

In addition, the syringe filter assembly and the syringe having the same according to the present invention, by being installed inside the syringe cylinder, there is an advantage that can be filtered without the additional combined use of a separate assembly module.

1 is a perspective view showing a syringe equipped with a filter assembly for a syringe according to the present invention.

FIG. 2 is an exploded perspective view showing the combined arrangement of the syringe to which the filter assembly for syringe of FIG. 1 is mounted; FIG.

3 is an exploded perspective view illustrating a coupling arrangement of the filter assembly of FIG. 2.

4 is a cross-sectional view along the A-A direction showing the inside of the filter assembly of FIG.

FIG. 5 is a cross-sectional view in the B-B direction showing the internal view of another angle of the filter assembly of FIG. 2. FIG.

6A to 6B are enlarged cross-sectional views illustrating an operation of the filter assembly of FIG. 2, and FIG. 6A is an enlarged cross-sectional view showing an operation of the filter assembly when the chemical liquid is inhaled. FIG. 6B is an operation of the filter assembly when the chemical liquid is discharged. It is an enlarged section showing the appearance.

FIG. 7 is a cross-sectional view taken along the C-C direction showing the inside of the housing of the filter assembly of FIG. 4. FIG.

8 is a perspective view showing another embodiment of the adapter of the filter assembly of FIG.

9 is an exploded perspective view showing a coupling arrangement of the adapter of FIG. 8 with a syringe;

FIG. 10 is a cross-sectional view showing the adapter of FIG. 8 coupled with a syringe. FIG.

11 is an exploded perspective view showing another embodiment of a filter assembly for a syringe according to the present invention.

12A and 12B are cross-sectional views illustrating an in-cylinder installation when chemical liquid is sucked from the outside of the filter assembly of FIG. 11.

13A and 13B are cross-sectional views showing the installation in a cylinder when the chemical liquid of the filter assembly of FIG. 11 is discharged.

Hereinafter, a syringe filter assembly and a syringe having the same according to the present invention will be described in detail with reference to the accompanying drawings.

A syringe having a filter assembly for a syringe according to the present invention, as shown in Figures 1 and 2, the needle 5 for fixing the needle (4) to be inserted into the drug administration subject; A cylinder (2) in which the chemical liquid is accommodated by using a pressure difference through the movement of the rod (6) to which the intake (7) is coupled to one end; It is characterized in that the syringe filter assembly is mounted between the needle (5) and the cylinder (2).

A syringe having a filter assembly for a syringe according to the present invention is a sterile product which is used for single use as a constitution for administering a medicinal liquid to a human body, and is configured to administer the inhaled medicinal liquid to a human body after inhaling the medicinal liquid into the syringe. .

The acupuncture (5) is a configuration for fixing the injection needle (4) which penetrates into the body of the medicine liquid administration subject and serves as a passage for supplying the medicine liquid to the administration subject, and various configurations are possible.

The immersion 5 is a configuration in which one end of the filter assembly to be described later is mounted. In this case, a mounting hole may be formed so that the filter assembly can be stably inserted.

The mounting hole may have a shape corresponding to the needle connector 110 of the filter assembly, and may serve as a channel of the chemical liquid so that the chemical liquid sucked or discharged through the needle connector 110 may pass.

The cylinder 2 has a suction rod 7 for receiving and discharging the chemical liquid, and a pusher 6 for transmitting the force necessary for advancing and retracting the suction liquid 7 to prevent the chemical liquid from leaking. As a configuration for forming a receiving space to be movable in the longitudinal direction, various configurations are possible.

The neck portion 3 is formed to extend to the side of the needle 5 of the cylinder 2, coupled with the needle 5, or can be various configurations as a configuration for mounting the filter assembly described later.

On the other hand, the syringe having a filter assembly for a syringe according to the present invention, as shown in Figures 9 to 10, in order to minimize the remaining chemical liquid in the cylinder (2) and neck portion (3), It is formed to protrude in the longitudinal direction of the neck portion 3 side of the cylinder 2, it may include a chemical liquid removal portion inserted into the neck portion 3 when moving forward.

The chemical liquid removing part is formed to protrude on the intake 7 and occupies a volume in the space in the neck part 3, thereby minimizing the remaining chemical liquid remaining in the neck part 3.

On the other hand, a syringe having a filter assembly for a syringe according to the present invention, the filter assembly for filtering the foreign matter in the chemical solution when the drug solution is discharged to be administered between the acupuncture (5) and the cylinder (2) for administration to the subject It can be mounted, it will be described in detail with reference to the accompanying drawings for the filter assembly for a syringe.

The filter assembly for a syringe according to the present invention, as shown in Figures 3 to 5, is mounted between the needle 5 and the neck portion 3 of the syringe cylinder (2) for fixing the needle (4), In the filter assembly for a syringe for filtering foreign substances of the chemical liquid discharged, a needle connecting portion 110 to which the needle 5 is coupled is formed at one end, and the neck portion 3 of the cylinder 2 is coupled to the other end. A housing 100; A discharge opening 311 through which the chemical liquid is discharged from the cylinder 2 is formed at one end thereof, and an outer circumferential surface of the suction passage 301 in which the chemical liquid is sucked through the infiltration connector 110 together with the inner circumferential surface of the housing 100. A first valve member (300) formed to block the discharge of the chemical liquid through the suction passage (301) when the chemical liquid from the cylinder (2) is discharged through the discharge opening (311); A filter 200 inserted into the other end of the first valve member 300 to filter foreign substances from the chemical liquid when the chemical liquid is discharged through the discharge opening 311; It is installed to be movable in the longitudinal direction in the housing 100, by opening and closing the discharge opening 311 through the movement according to the pressure of the chemical liquid, the discharge opening 311 when the chemical liquid is sucked through the suction flow path 301 It characterized in that it comprises a second valve member 400 for blocking the suction of the chemical liquid through the).

The housing 100 is formed with a needle connecting portion 110 to which the needle 5 is coupled at one end, and the neck portion 3 of the cylinder 2 is coupled to the other end, and various configurations are possible. .

For example, the housing 100 includes an internal space into which the first valve member 300, the second valve member 400, and the filter 200 are inserted, and the chemical liquid is sucked into the cylinder 2. Alternatively, when the chemical liquid is discharged from the cylinder 2, a flow path through which the chemical liquid flows can be formed.

In this case, the housing 100 may be a transparent material so that the inside is visible, and may be made of a material such as methyl methacrylate, acrylonitrile, butadiene, styrene copolymer.

The housing 100 has a needle connection connector 110 coupled to the needle needle 5 at one end thereof, and extends in a radial direction of the needle connection connector 110 to the step connector 110 so as to have a step 121. It may include an extended housing body 120.

The impregnation connector 110 is a configuration in which the needle 5 is fitted, and various configurations are possible.

For example, the needle connecting portion 110 may be configured to extend from the housing body 120 to be protruded to be inserted into the needle set 5, and may further have a tapered shape.

In addition, the impregnated connector 110 is fitted to the needle 5, a hollow 111 through which the chemical liquid passes in the longitudinal direction may be formed, the hollow 111, the chemical liquid is sucked from the needle 5, It may be a space in which the chemical liquid is discharged from the cylinder 2.

The housing body 120 is extended in the radial direction of the immersion connector 110, extending to the immersion connector 110 to have a step 121, various configurations are possible.

The housing body 120, as a configuration having an internal space, the first valve member 300, the second valve member 400 and the filter 200 may be inserted into the interior space, the chemical liquid cylinder (2) The suction passage 301 sucked into the) and the discharge passage through which the chemical liquid is discharged to the outside of the cylinder 2 may be formed, respectively.

The housing body 120 is formed to extend with the step 121 from the impregnated connection portion 110, in order to maintain a stable flow of the chemical liquid on the inner circumferential surface, the movement in the longitudinal direction of the first valve member 300 to be described later The locking portion 125 for preventing the protrusion may be formed.

In addition, the housing body 120, the first valve member 300 is a cylinder (corresponding to the wing portion 320, which will be described later, so as to easily block the discharge of the chemical liquid through the suction passage 301 through the flow of the chemical liquid ( 2) A groove 124 may be formed between the inclined portion 123 having a radius extending toward the side, and a smooth flow of the chemical liquid between the housing body 120 and the impregnated connection portion 110.

In addition, the housing main body 120 may have a flow path groove 122 formed in the step 121 in order to form a flow path through which the chemical liquid is discharged when the step 121 and the second valve member 400 contact each other. have.

The step 121 is a configuration in which the housing main body 120 extends in the radial direction from the immersion connecting portion 110 and is formed to extend. The second valve member 400 is hollow 111 through the flow of the chemical liquid. It may be a variety of configurations, such as not to be discharged together, to be located inside the housing body 120.

For example, when the step 121 is discharged through the hollow 111 of the infiltration connector 110 of the chemical liquid, the second valve member 400 is not discharged together to the hollow 111 at the pressure of the chemical liquid discharged. It may be formed so that a part of the second valve member 400 is caught.

On the other hand, in this case, when the second valve member 400 is advanced by the pressure of the chemical liquid discharged, there may be a problem that the discharge path of the chemical liquid is blocked by being in close contact with the step 121.

In order to solve this problem, a flow path groove 122 may be formed in the step 121 to form a flow path through which the chemical liquid is discharged even when the step 121 and the second valve member 400 contact each other.

As shown in FIG. 8, the flow path groove 122 is formed to have a depth in at least a portion of the step 121, thereby connecting the suction channel 301 and the hollow 111 of the infiltration connector 110 to each other. As a configuration in which the chemical liquid is discharged even in contact with the step 121 of the second valve member 400, various configurations are possible.

The flow path groove 122 is more preferably formed symmetrically with respect to the central axis in the longitudinal direction of the housing 100, it may be formed as a smooth discharge passage of the chemical liquid.

The inclined portion 123 has an inner circumferential surface of the housing body 120 toward the cylinder 2 side so that the first valve member 300 easily blocks the discharge of the chemical liquid through the suction passage 301 through the flow of the chemical liquid. As a configuration in which the radius of the beam is extended, various configurations are possible.

For example, the inclined portion 123 is configured to block the suction flow path 301 of the first valve member 300 so as to correspond to the inclination of the wing portion 320, and the pressure of the chemical liquid discharged is When acting on the wing 320, the suction channel 301 may be easily blocked by a small inclination deformation of the wing 320, so that the surface in contact with the wing 320 may be increased.

More specifically, the inclined portion 123 is formed in parallel with the wing portion 320, the inclined portion 123 is formed in the deformation of the wing portion 320 to the impregnated connecting portion 110 side according to the discharge of the chemical liquid. As a result, the wing 320 may contact the inner circumferential surface of the housing body 120 in a large area to more completely block the suction flow path 301.

The groove 124 is formed to extend from the hollow 111 to the housing body 120 side, it may be a variety of configurations to allow the chemical liquid to flow stably.

The locking portion 125 is configured to prevent movement of the first valve member 300 in the housing body 120, and various configurations are possible.

For example, the engaging portion 125, the inner circumferential surface of the housing main body 120 to be caught and interfere with a portion of the first valve member 300 so that the first valve member 300 is not advanced to the infiltration connector 110 side Can be protruded to.

On the other hand, the housing 100, one end is coupled to the housing body 120, so that the other end is fitted to the neck portion 3 so that the adapter 500 is located between the needle 5 and the neck portion (3) It may further comprise.

The adapter 500 has one end coupled to the housing body 120 and the other end fitted to the neck portion 3 so that the housing 100 is mounted between the needle connector 110 and the neck portion 3. As a structure to make, various structures are possible.

The adapter 500 may be more preferably made of a transparent material in order to determine the state of injection of the chemical liquid.

The adapter 500 may include the adapter 500 and the filter 200 to form one or more openings 510 for the passage of the chemical liquid, and a flow path 523 connected from the suction passage 301 to the opening 510. ) May include one or more protruding contact portions 520 protruding from and contacting the filter 200 to be spaced apart from each other.

In addition, the adapter 500 may include an extension protrusion 530 inserted into the neck part 3 in order to minimize residual chemical solution of the neck part 3.

In addition, the adapter 500, in order to be coupled to the housing body 120, the coupling portion 540 and the neck portion 3 is formed to be extended in the radial direction, the neck portion (3) can be fitted and coupled, Insertion hole 550 corresponding to the outer shape of the may be formed.

The opening 510 is configured to allow the chemical liquid to pass through the cylinder 2 and the housing body 120, and various configurations are possible.

For example, one or more openings 510 may be formed to extend from the insertion hole 550 so that the chemical liquid passing through the insertion hole 550 through which the neck portion 3 is fitted may be passed. May be formed to be symmetric with respect to the central axis of the adapter 500 for smooth flow of the chemical liquid.

The protruding contact portion 520, when the housing body 120 and the adapter 500 is coupled, when the first valve member 300 and the adapter 500 inserted into the housing body 120 are in close contact, suction There may be a problem that the suction of the chemical liquid through the flow path 301 is blocked, as a configuration for maintaining a predetermined distance between the adapter 500 and the first valve member 300, various configurations are possible.

More specifically, by allowing the first valve member 400 and the adapter 500 to be spaced apart, the suction of the chemical liquid through the suction passage 301, so that it can be sucked into the cylinder (2) through the opening 510, In order to form a flow path 523 connecting the suction flow path 301 and the opening 510, the protrusion contact part 520 may contact the filter 200 to form a flow path 523.

In this case, the protruding contact portion 520 contacts the filter 200 inserted into the first valve member 400, thereby maintaining a space between the first valve member 400 and the adapter 500 so that the flow path 523 is closed. Is formed.

The flow path 523 connects the suction flow path 301 and the opening 510, and may constitute a part of the suction path of the chemical liquid.

The protruding contact portion 520 may include at least one first protruding contact portion 521 and a first protruding contact portion 521 to protrude to the housing body 120 of the adapter 500 so as to directly contact the filter 200. It may include a second protrusion contact portion 522 protruding between the openings 510, so that the chemical liquid flows smoothly into the openings 510.

The extension protrusion 530 is inserted into the neck portion 3 in order to minimize the residual chemical solution of the neck portion 3, and various configurations are possible.

The extension protrusion 530 is formed at the center of the insertion hole 550 of the adapter 500 to be inserted into the neck portion 3 when the neck portion 3 is coupled through the insertion hole 550 of the neck portion 3. By occupying the volume of the internal space of (3), it is possible to minimize the residual chemical liquid remaining in the neck (3).

The extension protrusion 530 may have various configurations that occupy the volume of the internal space of the neck 3, for example, may occupy a part of the internal space of the neck 3, and further, the intake 7 It may be formed corresponding to the length of the neck portion 3 to be in contact with the intake 7 when the maximum advance of.

On the other hand, as another embodiment, as described above, when the chemical liquid removing portion is formed in the intake 7, the chemical liquid removing portion occupies the internal space of the neck portion 3 at the time of maximum advance of the intake 7, An extension protrusion 530 may be formed to correspond to the length of or may not include the extension protrusion 530.

The coupling part 540 may include one or

more adhesion steps

541 and 542 protruding in a radial direction so as to correspond to the radial size of the inner circumferential surface of the housing body 120 in order to prevent leakage of the chemical liquid. have.

When the coupling part 540 is fitted to the housing main body 120 and is coupled to the housing main body 120, the coupling part 540 is formed to be in close contact with the end of the housing main body 120, so that the housing main body 120 and the adapter 500 are in close contact with each other so that no leakage of the chemical liquid occurs. As the configuration to be combined, various configurations are possible.

For example, the coupling part 540 is extended in the radial direction of the adapter 500, it may be in close contact with the end of the housing body 120 and coupled.

The insertion hole 550 is a configuration in which the neck portion 3 is inserted and the chemical liquid passes therethrough, and may correspond to the shape of the neck portion 3 and may be a tapered hole.

As shown in FIGS. 6A to 6B, the first valve member 300 has a discharge opening 311 through which the chemical liquid is discharged from the cylinder 2 at one end thereof, and an outer circumferential surface thereof is formed with an inner circumferential surface of the housing 100. Together with the chemical liquid is formed through the inlet connection 110, the suction flow path 301 is formed, and when the chemical liquid from the cylinder 2 is discharged through the discharge opening 311 to discharge the liquid through the suction flow path 301 As a structure which cuts off, various structures are possible.

The first valve member 300 may be made of an elastic material, for example, made of a silicon material in order to block the suction flow path 301 at a pressure according to the flow of the chemical liquid.

The first valve member 300 is extended to the main body portion 310, the discharge opening 311 is formed, and the inclined toward the neck portion 3 side from the main body portion 310, the pressure of the chemical liquid during drug discharge By being in close contact with the inner surface of the housing 100, it may include a wing 320 to block the suction flow path 301 to prevent the discharge of the chemical liquid.

The suction passage 301 is formed in the longitudinal direction of the housing body 120 between the outer circumferential surface of the first valve member 300 and the inner circumferential surface of the housing body 120, so that the chemical liquid is hollow (111) of the infiltration connector 110. As a suction path from the), it may be more preferably symmetrical with respect to the central axis of the housing body 120.

The main body 310 is a configuration in which the discharge opening 311 for discharging the chemical liquid is formed at one end of the infiltration connector 110, various configurations are possible.

The main body 310 includes a filter insertion hole 312 which is formed with a step from the discharge opening 311 therein so that the filter 200 is inserted to filter foreign substances in the chemical liquid when the chemical liquid is discharged. can do.

The filter 200 is inserted into the filter insertion hole 312 to filter foreign substances in the chemical liquid during discharge of the chemical liquid, and may have various configurations.

For example, the filter 200 has a size and shape corresponding to the filter insertion hole 312, and may have a cylindrical shape, and may be a filter of 5.0 μm high density polyethylene.

The wing portion 320 is formed to be inclined toward the neck portion 3 on the outer circumferential surface of the main body 310, and is in close contact with the inner surface of the housing 100 by the pressure of the chemical liquid during discharge of the chemical liquid, Blocking the 301 to prevent the discharge of the chemical liquid, various configurations are possible.

For example, the wing 320 is made of a silicon material, has an elastic force, and closes the inner peripheral surface of the housing body 120 at a pressure according to the flow of the chemical liquid when discharged from the cylinder (2) of the chemical liquid It is extended in the radial direction so as to block the suction flow path 301, it is possible to prevent the discharge of the chemical liquid to the suction flow path (301).

On the other hand, the wing portion 320, the neck portion (3) side is formed to be inclined to expand the bar, when the suction of the chemical liquid to the cylinder (2), the wing portion 320 by the pressure according to the flow of the chemical liquid to the main body portion ( By folding in the direction of the outer circumferential surface of 310, the suction passage 301 can be opened, and suction of the chemical liquid into the suction passage 301 can be induced smoothly.

On the other hand, as another embodiment, the wing 320 is extended in the radial direction of the main body 310, by forming a step on the inner circumferential surface of the housing body 120, when the suction of the chemical liquid, wing 320 Is folded to the outer peripheral surface side of the main body 310 to open the suction flow path 301, when the discharge of the chemical liquid, the wing 320 may be caught in the step can close the suction flow path (301).

The second valve member 400 is installed to be movable in the longitudinal direction in the housing 100, by opening and closing the discharge opening 311 through the movement according to the pressure of the chemical liquid, the chemical liquid through the suction flow path 301 As a configuration to block the suction of the chemical liquid through the discharge opening 311 when inhaled, various configurations are possible.

For example, the second valve member 400 is installed to be movable in the longitudinal direction of the housing 100 between the step 121 and the first valve member 300, through the movement according to the pressure of the chemical liquid The discharge opening 311 of the first valve member 300 may be opened and closed.

More specifically, as shown in Figure 6a to 6b, when the chemical liquid is discharged from the cylinder 2, when the chemical liquid filtered out foreign matter through the filter 200 is discharged through the discharge opening 311, the chemical liquid By moving the second valve member 400 toward the infiltration connector 110 at the pressure of, the discharge opening 311 may be opened to discharge the chemical liquid.

On the contrary, when the chemical liquid is sucked into the cylinder 2, the second valve member 400 moves to the first valve member 300 side by the pressure corresponding to the suction of the chemical liquid to close the discharge opening 311, thereby discharging the opening. Inhalation of the chemical solution through 311 may be blocked.

On the other hand, when the second valve member 400 is simply a disk shape, the suction passage 301 is blocked by left and right vibrations or the like during the movement along the longitudinal direction of the housing body 120, or the discharge opening 311 is completely closed. By not closing, the inhalation of the chemical liquid may not be smooth, or the problem may be accompanied by the suction of the chemical liquid through the discharge opening 311.

In this case, the chemical liquid sucked through the discharge opening 311 is present between the discharge opening 311 and the hollow 111 through the filter 200, when the discharge of the chemical liquid, foreign matter with the flow of the chemical liquid There may be a problem entering into the body of the subject.

In order to solve this problem, the second valve member 400, the protrusion 410 is installed to be movable along the hollow 111 corresponding to the hollow 111, and extends in the radial direction from the protrusion 410 It is extended and formed, and may have a larger diameter than the discharge opening 310 may include a close contact portion 420 for opening and closing the discharge opening 311 according to the movement of the protrusion 410 according to the pressure of the chemical liquid.

The protrusion 410 is configured to be movable along the hollow 111 in correspondence with the hollow 111, and is spaced apart from the inner surface of the hollow 111 to form a flow path through which the chemical liquid passes through the hollow 111. It can be a variety of configurations movable along.

The protrusion 410 is moved along the hollow 111 in correspondence with the hollow 111, thereby causing fine positional deviation such as oscillating left and right about the central axis of the housing body 120 of the second valve member 400. And precise positioning can be achieved.

On the other hand, the protrusion 410, corresponding to the hollow 111 having a tapered shape of the diameter of the needle 5 side is smaller than the diameter of the housing body 120 side, is spaced apart from the inner surface of the needle connector 110, It may be a tapered shape corresponding to the (111).

For example, the protrusion 410 may have a length of 2.50 mm or more and 10.00 mm or less, and a diameter of 0.75 mm or more and 4.20 mm or less.

The close contact portion 420 extends in the radial direction from the protrusion 410 and extends, and has a diameter larger than that of the discharge opening 310 and discharges 311 according to the movement of the protrusion 410 according to the pressure of the chemical liquid. As a configuration for opening and closing the circuit, various configurations are possible.

For example, the close contact portion 420 has a diameter larger than that of the discharge opening 310, and has a diameter larger than that of the hollow 111, so that the close contact portion 420 is in close contact with the discharge opening 310 when the chemical liquid is inhaled. When closing the 310 and discharging the chemical liquid, a step 121 may be caught to prevent the second valve member 400 from passing through the hollow 111.

Accordingly, the close contact portion 420 may have a diameter of 1.50 mm or more and 5.20 mm or less.

On the other hand, as described above, when the second valve member 400 is advanced by the pressure according to the discharge of the chemical liquid, when contacted with the step 121, the discharge path of the chemical liquid is blocked, it may be a problem.

At this time, the housing body 120, the flow path groove 122 may be formed in the step 121 to form a flow path for the chemical liquid is discharged when the step 121 and the second valve member 400 in contact. have.

Therefore, even when the second valve member 400 is moved forward, the close contact portion 420 is caught by the step 121 and the advance is limited, and the chemical liquid may be discharged through the flow path groove 122.

On the other hand, in another embodiment, the second valve member 400, the step of the body portion 420, in order to form a flow path through which the chemical liquid is discharged even in contact with the step 121 and the second valve member 400 One or more protrusions (not shown) may be formed on the contact surface with 121.

One or more protrusions are formed on the contact surface with the step 121 of the close contact part 420 to prevent the close contact part 420 from coming into close contact with the step 121 even at the maximum advance of the second valve member 400. By maintaining a constant interval between, so that the path to the chemical liquid is formed, it is possible to enable the smooth discharge of the chemical liquid.

On the other hand, specific specifications of the filter assembly for a syringe according to the present invention will be described below.

The protruding portion 410 may have a cylindrical shape in which the outer circumferential surface thereof is formed perpendicularly to the contact portion 420 in the longitudinal direction, and more preferably, the diameter of the contact portion 420 side is the diameter of the impregnation connection portion 110 side. It may be tapered with a larger value.

In this case, the diameter of the projection 410 is that the diameter D ₂ has a maximum value of the diameter can have a maximum of 4.20mm, a minimum value may have a 0.75mm.

The length L ₁ of the protrusion 410 is a length from _one end to the point where the contact portion 420 is in contact with the contact portion 420, and may have a length of 2.50 mm or more and 10.00 mm or less.

The length L ₁ of the protrusion 410 may be manufactured in consideration of the length of the hollow 111 in consideration of the longitudinal movement of the protrusion 410 to the hollow 111.

The outer circumferential surface of the protrusion 410, when the angle formed in the longitudinal direction (Z-axis direction) of the protrusion 410 is θ ₁ , the θ ₁ value may be 0 ° or more and 46.12 ° or less.

_{_{Specifically, tanθ 1 = (D 2/}} 2) / L can be expressed by _1, in this case, the maximum value which may have is, the maximum value of 2.6mm in actual product application example based on the D _2/2 of the Calculated by substituting the minimum value of L ₁ , 2.5mm, in this case the maximum value can be 46.12 °.

On the other hand, θ ₁ , in this case, the inner circumferential surface of the hollow 111 may be formed larger than the size of the angle θ ₂ formed in the longitudinal direction of the hollow 111, that is, the longitudinal direction (Z-axis direction) of the housing 100. .

Specifically, when the size of the angle θ ₂ formed between the longitudinal direction (Z-axis direction) of the housing 100 and the inner circumferential surface of the hollow 111 is greater than the size of θ ₁ , the longitudinal direction in the hollow 111 of the protrusion 410 is provided. Movement may not be smooth, and may be in contact with the inner circumferential surface of the infiltration connector 110, in this case there may be a problem that the suction and discharge of the chemical solution is not smooth.

Therefore, θ ₁ may be larger than the size of θ ₂ .

The θ ₂ may be 0, and more preferably as a tapered shape, θ ₂ may have a value greater than zero.

The hollow 111 may be formed to a diameter of 1.4mm or more and less than 4.45mm for the intake and discharge of the more preferable chemical solution, and the seamless connection with the acupuncture (5), when the hollow 111 is tapered, the diameter The diameter D ₁ having the maximum value may be 1.4 mm or more and less than 4.45 mm.

Meanwhile, the hollow 111 may have a length of 8.3 mm or more and 8.7 mm or less, and preferably 8.5 mm.

The attachment portion 420, and a height of 0.1mm be up to more than 0.6mm, the outer diameter of the attachment portion 420 has a D ₃ be up to more than 1.5mm 5.2mm.

In particular, the by attachment portion 420 has a diameter corresponding to appropriate values of the outer diameter and the hollow 111 of the attachment portion 420 is D ₃ the projection 410 the outside diameter of the second valve member 400 It can be prevented from leaving the housing body 120 by passing through the hollow 111 and to enable the proper suction and discharge of the chemical liquid.

According to the above specification, it is possible to facilitate the inhalation and discharge of the liquid, and to describe the proper ratio of the length between the members so that the user can use a syringe having a filter assembly for a syringe according to the present invention at an appropriate pressure.

When the outer diameter of the lower end of the protrusion 410 is D ₂ , and the inner diameter of the lower end of the hollow 111 is D ₁ , D ₂ / D ₁ may be 0.169 or more and less than 1.00.

This projected using 0.75mm, which is the minimum value of D ₂ , and 4.45mm, which is the maximum value of D ₁ , and protruded considering the longitudinal movement of the protrusion 410 to the hollow 111. Suction and discharge are possible.

On the other hand, is the length of the protrusion (410) L _1, when the length of the hollow (111) L ₂ days, and the L ₁ / L ₂ be up to 0.294 more than 1.177, which is the minimum value of 2.50mm, and the maximum value L ₁ 10.00 It can be derived using the mm and L ₂ values 8.50 mm (fixed values taking into account the syringe standard).

In addition, when the outer diameter of the lower end of the protruding portion 410 is D _2, and the outer diameter of the close contact portion 420 is D ₃ , D ₂ / D ₃ may be 0.144 or more and less than 1.000.

Furthermore, when the inner diameter of the lower end of the hollow 111 is D ₁ , and the outer diameter of the close contact portion 420 is D ₃ , D ₁ / D ₃ may be 0.269 or more and less than 1.000.

In this case, to prevent the hollow fiber 111 through the second valve member 400, the outer diameter D ₃ of the attachment portion 420 may be appropriately respond in the above ratio to the diameter D ₁ of the hollow 111.

On the other hand, with reference to the accompanying drawings with respect to another embodiment of the filter assembly for a syringe according to the present invention will be described in detail.

The syringe filter assembly according to the present invention, as shown in Figures 11 to 15, in the filter assembly for syringes installed in the syringe, in order to filter the foreign matter of the chemical liquid, the syringe cylinder (2) or needle (4) A first valve member (300) installed inside the acupuncture (5) fixing the first through the discharge opening (311) through which the chemical liquid is discharged to the outside; A filter 200 inserted into the first valve member 300 to filter foreign substances from the chemical liquid when the chemical liquid is discharged through the discharge opening 311; The second valve member 400 is installed to be movable in the longitudinal direction in the cylinder 2 or the acupuncture 5, and opens and closes the discharge opening 311 through movement according to the pressure of the chemical liquid. It includes.

In this case, detailed description of the same configuration as the above-described embodiment with respect to the configuration of the first valve member 300, the filter 200 and the second valve member 400 will be omitted.

The filter assembly for a syringe according to the present invention may be installed in a syringe in order to filter foreign substances in the chemical liquid, and more specifically, may be installed at the end of the neck portion 3 in the syringe cylinder 2.

In addition, of course, it can also be installed inside the needle 5, in which the needle 4 is fixed.

The cylinder 2 is a structure in which the chemical liquid is stored and the chemical liquid is sucked or discharged through the push rod 6, and the neck portion 3 for coupling the needle 5 to which the needle 4 is fixed extends. Can be formed.

At this time, the neck portion 3, the hollow 611 may be formed in the longitudinal direction so that the chemical liquid passes.

The hollow 611 is configured to allow the chemical liquid to pass through the neck portion 3 or the needle 5, and may have a tapered shape having a smaller radius toward the needle 4.

The cylinder 2 extends in the radial direction of the neck portion 3 to have a step 621. Furthermore, the cylinder 2 forms a flow path through which the chemical liquid is discharged when the step 621 contacts the second valve member 400. At least one flow path groove 622 may be formed in the step 621.

On the other hand, the cylinder 2 is formed to be partially extended in the radial direction in order to prevent the discharge of the chemical liquid through the suction passage 301 through the wing portion 320 formed on the lower end of the first valve member (300). It may include the inclined portion 623.

The first valve member 300 has a configuration in which an outer circumferential surface forms a suction flow passage 301 in which the chemical liquid is sucked from the outside together with the inner circumferential surface of the cylinder 2 or the infiltrator 5.

For example, the first valve member 300 may be coupled to the inner circumferential surface of the cylinder 2 and at least one outer circumferential surface to form a suction passage 301 between the inner circumferential surface and the outer circumferential surface of the cylinder 2. The suction flow path groove may be formed.

Meanwhile, the first valve member 300 may be fixedly installed on the inner circumferential surface of the cylinder 2 and may also be fixedly installed in the inside of the infiltration device 5.

The second valve member 400 is configured to open and close the discharge opening 311 of the first valve member 300, and closes the discharge opening 311 at the time of inhalation of the chemical liquid, and the chemical liquid through the discharge opening 311. To prevent the inhalation, and when the discharge of the chemical liquid can be discharged through the discharge opening 311 by opening the discharge opening 311 through the filter 200.

As described above, the second valve member 400 has a protrusion 410 formed in a shape corresponding to the hollow 611 which is formed to pass through the chemical liquid in the neck portion 3 or the needle 5, and a protrusion portion. It may include a close contact portion 420 is extended in the radial direction from the 410 is formed to open and close the discharge opening 311 in accordance with the movement of the protrusion 410.

In this case, the protrusion 410 may be spaced apart from the inner circumferential surface of the hollow 611 formed in the neck 3 or the needle 5, and guided to the hollow 611 to move in the longitudinal direction of the syringe.

As a result, the protrusion 410 can be stably moved in the longitudinal direction of the syringe, and furthermore, the adhesion part 420 and the protrusion 410 are prevented from vibrating or moving in the transverse direction, thereby stably discharging and sucking the chemical liquid. Can be done.

The filter assembly according to the present invention may further include an adapter part 700 installed inside the cylinder 2 below the first valve member 300 to fix the position of the filter 200.

More specifically, the adapter 700 is located below the first valve member 300, to fix the filter 200 is inserted into the first valve member 300, the maximum of the push rod (6) By limiting the rising position, it may be a configuration to enable a stable chemical liquid input.

The adapter unit 700 may be fitted into the cylinder 2 and fixedly installed, and at least one chemical path may be formed to allow the chemical to pass therethrough.

On the other hand, the size and length ratio between the protrusion 410 and the hollow 611 is as described above.

In this case, the adhesion part 420 may have an outer diameter of 25.33 mm or less.

Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

Claims

In the filter assembly for syringes, which is mounted between the needle 5 for fixing the injection needle 4 and the neck portion 3 of the syringe cylinder 2, to filter foreign substances in the discharged chemical liquid,

A housing (100) formed at one end thereof with a needle connecting portion (110) to which the needle (5) is coupled, and the neck portion (3) of the cylinder (2) at the other end thereof;

A discharge opening 311 through which the chemical liquid is discharged from the cylinder 2 is formed at one end thereof, and an outer circumferential surface of the suction passage 301 in which the chemical liquid is sucked through the infiltration connector 110 together with the inner circumferential surface of the housing 100. A first valve member (300) formed to block the discharge of the chemical liquid through the suction passage (301) when the chemical liquid from the cylinder (2) is discharged through the discharge opening (311);

A filter 200 inserted into the other end of the first valve member 300 to filter foreign substances from the chemical liquid when the chemical liquid is discharged through the discharge opening 311;

It is installed to be movable in the longitudinal direction in the housing 100, by opening and closing the discharge opening 311 through the movement according to the pressure of the chemical liquid, the discharge opening 311 when the chemical liquid is sucked through the suction flow path 301 Filter assembly for a syringe, characterized in that it comprises a second valve member (400) for blocking the suction of the chemical through.
The method according to claim 1,

The housing 100,

It includes a housing body 120 which extends in the radial connection of the immersion connector 110 is formed in the immersion connector 110 to have a step 121,

The impregnation connector 110,

The filter assembly for the syringe, characterized in that the hollow 111 is inserted into the needle (5), the drug solution passes in the longitudinal direction.
The method according to claim 1,

The first valve member 300,

A main body 310 in which the discharge opening 311 is formed;

The inclined extension from the main body portion 310 toward the neck portion 3 is formed to be in close contact with the inner surface of the housing 100 by the pressure of the chemical liquid at the time of discharging the liquid, thereby blocking the suction flow path 301 Syringe filter assembly comprising a wing 320 to prevent the discharge of.
The method according to claim 3,

The main body 310, the filter 200 is inserted into the filter insertion hole 312 from the discharge opening 311 therein so as to be expanded to have a step,

The filter 200 is inserted into the filter insertion hole 312, the filter assembly for a syringe, characterized in that to filter foreign matter when the discharge of the chemical liquid.
In window 2,

The second valve member 400,

A protrusion 410 corresponding to the hollow 111 and movably installed along the hollow 111, and extends and extends in a radial direction from the protrusion 410, and has a larger diameter than the discharge opening 310. The filter assembly for a syringe comprising a contact portion 420 for opening and closing the discharge opening (311) in accordance with the movement of the protrusion 410 in accordance with the pressure of the chemical liquid.
The method according to claim 5,

The hollow 111 is tapered in diameter on the side of the needle 5 is smaller than the diameter on the housing body 120 side,

The protrusion 410 is spaced apart from the inner surface of the needle connecting portion 110, filter assembly for a syringe, characterized in that the tapered shape corresponding to the hollow (111).
The method according to claim 6,

When the outer diameter of the lower end of the protrusion 410 is D 2 , the inner diameter of the lower end of the hollow 111 is D 1 , the filter assembly for a syringe, characterized in that D 2 / D 1 is 0.169 or more and less than 1.000.
The method according to claim 6,

The length of the protrusion 410 is L 1 , when the length of the hollow 111 is L 2 , the filter assembly for a syringe, characterized in that 0.294 or more.
The method according to claim 6,

When the outer diameter of the lower end of the protruding portion 410 is D 2 , the outer diameter of the close contact portion 420 is D 3 , the filter assembly for syringes, characterized in that D 2 / D 3 is 0.144 or more and less than 1.000.
The method according to claim 6,

When the inner diameter of the lower end of the hollow 111 is D 1 , the outer diameter of the close contact portion 420 is D 3 , D 1 / D 3 is 0.269 or more less than 1.000 filter assembly, characterized in that.
The method according to claim 2,

The housing body 120,

In order to form a flow path through which the chemical liquid is discharged when the step 121 and the second valve member 400 are contacted, a flow path groove 122 is formed in the step 121.
The method according to claim 2,

The second valve member 400,

In order to form a flow path through which the chemical liquid is discharged even when the step 121 and the second valve member 400 are contacted, at least one protrusion is formed on a contact surface of the main body 420 with the step 121. Filter assembly for syringe.
The method according to claim 2,

The housing 100,

An adapter 500 having one end coupled to the housing main body 120 and the other end fitted to the neck part 3 so that the housing 100 is positioned between the needle 5 and the neck part 3. Syringe filter assembly, characterized in that it further comprises.
The method according to claim 13,

The adapter 500,

One or more openings 510 for the passage of the chemical liquid,

Protruding contact with the filter 200 so as to be spaced apart between the adapter 500 and the filter 200 to form a flow path 523 from the suction passage 301 to the opening 510. Filter assembly for a syringe comprising the above projecting contact portion (520).
The method according to claim 13,

The adapter 500,

Filter assembly for a syringe, characterized in that it comprises an extension protrusion (530) inserted into the neck portion (3) in order to minimize the remaining chemical solution of the neck portion (3).
Acupuncture (5) for fixing the needle (4) to be inserted into the drug solution subject;

A cylinder (2) in which the chemical liquid is accommodated by using a pressure difference through the movement of the rod (6) to which the intake (7) is coupled to one end;

Syringe, characterized in that the filter assembly for a syringe according to any one of claims 1 to 13 is mounted between the needle (5) and the cylinder (2).
The method according to claim 16,

In order to minimize the remaining chemical liquid in the neck portion 3 of the cylinder 2, the intake 7 in the cylinder 2 protrudes in the longitudinal direction of the cylinder 2, Syringe, characterized in that it comprises a chemical liquid removal portion inserted into the neck portion (3) when advancing.
In the filter assembly for syringes installed in the syringe, in order to filter foreign substances in the chemical liquid,

Corresponding to the hollow 611 is formed so that the drug solution passes through the needle (5) to secure the injection needle (4) or the neck portion (3) of the syringe, the protrusion 410 is installed to be movable along the hollow (611) )Wow;

It extends in the radial direction from the protruding portion 410 is formed extending, the syringe comprising a contact portion 420 for opening and closing the flow path through which the chemical liquid passes in accordance with the movement of the protrusion 410 according to the pressure of the chemical liquid Filter assembly.
In the filter assembly for syringes installed in the syringe, in order to filter foreign substances in the chemical liquid,

A first valve member (300) installed inside the acupuncture (5) fixing the syringe cylinder (2) or the needle (4) and discharging the chemical liquid to the outside through the discharge opening (311) through which the chemical liquid is discharged;

A filter 200 inserted into the first valve member 300 to filter foreign substances from the chemical liquid when the chemical liquid is discharged through the discharge opening 311;

The second valve member 400 is installed to be movable in the longitudinal direction in the cylinder 2 or the acupuncture 5, and opens and closes the discharge opening 311 through movement according to the pressure of the chemical liquid. Syringe filter assembly comprising a.
The method according to claim 19,

The second valve member 400,

Corresponding to the hollow 611 which is formed so that the drug solution passes through the neck portion 3 of the syringe or the acupuncture 5, the protrusion 410 is installed to be movable along the hollow 611, and the protrusion 410 Expanded in the radial direction from the () is formed, and the filter assembly for a syringe comprising a contact portion 420 for opening and closing the discharge opening 311 according to the movement of the protrusion 410 in accordance with the pressure of the chemical liquid .
The method according to claim 19,

The first valve member 300,

An outer circumference surface forms an intake passage 301 through which the chemical liquid is sucked from the outside together with the inner circumferential surface of the cylinder 2 or the infiltrator 5, and when the chemical liquid is discharged through the discharge opening 311, the suction passage 301. Filter assembly for a syringe, characterized in that to block the discharge of the drug solution through.
The method of claim 20,

When the outer diameter of the lower end of the protrusion 410 is D 2 , the inner diameter of the lower end of the hollow 611 is D 1 , the filter assembly for a syringe, characterized in that D 2 / D 1 is 0.169 or more and less than 1.000.
The method of claim 20,

The length of the protruding portion 410 is L 1 , the filter assembly for a syringe, characterized in that 0.294 or more, 1.177 or less when the length of the hollow 611 is L 2 .
The method of claim 20,

The outer diameter of the lower end of the protruding portion 410 is D 2 , the filter assembly for a syringe, characterized in that D 2 / D 3 is 0.144 or more and less than 1.000 when the outer diameter of the contact portion 420 is D 3 .
The method of claim 20,

When the inner diameter of the lower end of the hollow 611 is D 1 , and the outer diameter of the close contact portion 420 is D 3 , D 1 / D 3 is 0.269 or more and less than 1.000 filter assembly for a syringe.
The method of claim 20,

The close contact portion 420, the filter assembly for a syringe, characterized in that the outer diameter is 25.33mm or less.