KR101720986B1 - Syringe with a needles pulling function and at the same time injection filtering - Google Patents

Syringe with a needles pulling function and at the same time injection filtering Download PDF

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Publication number
KR101720986B1
KR101720986B1 KR1020160106996A KR20160106996A KR101720986B1 KR 101720986 B1 KR101720986 B1 KR 101720986B1 KR 1020160106996 A KR1020160106996 A KR 1020160106996A KR 20160106996 A KR20160106996 A KR 20160106996A KR 101720986 B1 KR101720986 B1 KR 101720986B1
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KR
South Korea
Prior art keywords
filter
protrusion
piston
spout
center hole
Prior art date
Application number
KR1020160106996A
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Korean (ko)
Inventor
엄관용
Original Assignee
협성메디칼 주식회사
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Priority to KR1020160106996A priority Critical patent/KR101720986B1/en
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Publication of KR101720986B1 publication Critical patent/KR101720986B1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3145—Filters incorporated in syringes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/323—Connection between plunger distal end and needle hub proximal end, e.g. stud protruding from the plunger
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Environmental & Geological Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The present invention relates to a syringe having a function of injecting a needle and having a function of filtering a syringe at the same time, and more particularly, to a syringe capable of preventing a secondary infection caused by being stuck to a needle after using a syringe, The present invention relates to a syringe having both an injected needle inlet and an injected liquid filtering function so that the injection can be easily set by reducing the pressure applied to the syringe when injecting the injected liquid.

Description

[0001] The present invention relates to a syringe having a needle insertion and a syringe filtering function,

The present invention relates to a syringe having a function of injecting a needle and having a function of filtering a syringe at the same time, and more particularly, to a syringe capable of preventing a secondary infection caused by being stuck to a needle after using a syringe, The present invention relates to a syringe having both an injected needle inlet and an injected liquid filtering function so that the injection can be easily set by reducing the pressure applied to the syringe when injecting the injected liquid.

In general, a syringe is a device for injecting a drug solution into a tissue of a living body, and is mainly used for the treatment of diseases. The body and the piston are made of plastic, and the injection needle is pierced so that the drug solution is injected at the time of injection.

In order to inject the medicinal solution into the tissues of the living body using such a syringe, a separate reservoir for the medicinal solution is required. The syringe sucks the medicinal solution contained in the medicinal solution storage container using the injection needle and injects the medicinal solution into the tissue of the living body to be injected.

In this case, the syringe is carried with the chemical reservoir and treated as waste after use.

However, in the conventional syringe, since the injection needle is inserted into and withdrawn from the tip of the syringe body, the injection needle is fixed, and therefore it is often stuck to the injection needle due to carelessness during the injection process or the post-injection disposal process.

Care should be taken to avoid such routine inattention, which can be a very important pathway for secondary infection. In particular, when a person handling a syringe is stabbed at the time of the treatment of the injection fluid related to AIDS, etc., the puffiness is continuously increased to cause anxiety, and furthermore, when the infectious patient is injected, the risk of infection is very high.

On the other hand, the chemical solution may be contained in ampoules. When the ampoule is opened to draw the chemical solution with the syringe, the ampoule is made of glass or plastic. Due to the nature of fine particles (glass or plastic) Or sucked into the syringe during the process of inhalation, and finally injected into the human body.

In order to improve this, several improvement examples have been disclosed, such as the installation of a filter in the syringe. However, in the case of these filters, the channel of the chemical solution injected after filtering is bent once through the edge, Since the internal pressure is greatly increased when the piston is pressed for injection, the injection operation is not easy. In particular, in the case of the highly viscous liquid, the pressure is increased so that the injection can not be performed smoothly. I make it.

Korea Patent Registration No. 10-1354451 (Jan. 16, 2014) 'Filter syringe' Korea Disclosure Practical Work No. 20-2015-0000096 (2015.01.07) 'disposable safety filter syringe equipped with special filtering resin capable of shanghai dong'

The present invention has been made in view of the above-mentioned problems in the prior art, and it is an object of the present invention to provide a method for preventing secondary infection caused by puncturing a needle after use of a syringe, And a syringe having both an injected needle injection function and an injected liquid filtering function so that the injection can be easily set by reducing the pressure applied to the syringe when injecting the injected liquid.

In order to achieve the above object, according to the present invention, there is provided a spark ignition type internal combustion engine comprising: a body cylinder having a spout extending in a stepped-down manner at a front end thereof and having a flange at a rear end thereof; A piston inserted into the body cylinder and reciprocating to generate a pressure to suck and discharge the fluid through the spout; Wherein the piston is formed in a hollow cylindrical shape, and a filter binding body is fixed to an inner diameter of a distal end thereof; A filter fixture is inserted and fixed in the spout of the body cylinder; A filter member is provided inside the filter fixture; The filter binding body has a fixing hook formed at its tip end, a curved protrusion protruding from the inner diameter of the piston protrudes from the rear end, a one end of the compression spring is fixed to the rear end, And is fixed to a cap fitted to the inner rear end of the housing; Wherein the filter fastener comprises an insertion portion fitted to the smallest diameter of the spout and having a needle fitting portion and a diameter enlarging portion having a diameter larger than that of the insertion portion and having a hooking protrusion formed at the rear end thereof for hook engagement with the fixing hook; The filter member being fixed to the silicon filter and having a center frame fitted to the enlarged diameter portion and having a first center hole having a center hole and a second center hole fixed to the fixing base and communicating with the first center hole, And a main filter having a third center groove recessed at a predetermined depth; Wherein an O-ring is provided between the inner diameter of the body cylinder and the outer diameter of the distal end of the piston, and between the inner diameter of the distal end of the piston and the outer diameter of the distal end of the filter binding body.

At this time, the fixing member constituting the filter member is formed with a flow-through space through which a fluid can flow, and a plurality of fixing rods protruding from the first center hole are spaced apart from each other. A large number of cylindrical protrusions are formed on the outer side of the barrel and a larger diameter pin is formed on the outer side of the barrel; The main filter is inserted into the cylindrical protrusion, and a plurality of bar holes are formed around the third center groove.

In addition, an O-ring is further provided between the boundary portion between the insertion portion and the enlarged diameter portion and between the inner diameter-restricted portion of the spout.

Further, a spout jaw is further formed in the inner diameter of the spout, and an outer diameter of the filter jig is further formed with a hooking protrusion which is caught in the spout jaw in the circumferential direction.

According to the present invention, it is possible to prevent secondary infection caused by puncturing the injection needle after using the syringe, and to completely remove the foreign substances that may be contained in the injection liquid, and to reduce the pressure applied to the syringe when the injection liquid is injected, Can be obtained.

1 is an exemplary cross-sectional view showing the structure of a syringe according to the present invention.
2 is an exemplary view showing an example of using a syringe according to the present invention.
3 is an explanatory view illustrating a coupling example in which a filter unit of a syringe according to the present invention is separated.
Figure 4 is an exemplary partial cross-sectional view illustrating the operating relationship of the syringe according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

As shown in FIG. 1, a syringe having the needle injection inlet and the injection fluid filtering function according to the present invention includes a body cylinder 100.

The body cylinder 100 has a hollow cylindrical shape, a spout 110 at the tip, and a flange 120 at the rear end.

The piston 200 is inserted into the body cylinder 100 and slides along the longitudinal direction inside the body cylinder 100 to perform a function of sucking or discharging the injection liquid.

At this time, unlike the conventional piston, the piston 200 can be inserted into the body cylinder 100, and the interior of the cylinder 200 is hollow.

Particularly, a piston O-ring groove 210 is formed on the outer peripheral surface of the distal end of the piston 200, and a piston O-ring 220 as shown in FIG. 2 is inserted into the piston O- And the inner circumferential surface of the body cylinder (100).

A curved surface jaw 240 having a gentle curvature at an interval from the right angle jaw 230 is formed on the inner circumferential surface of the distal end portion of the piston 200 in a circumferential direction, .

The filter binding body 300 is disposed inside the piston 200 and the filter binding body 300 is disposed such that a part of the tip of the filter binding body 300 is exposed from the tip of the piston 200 for a predetermined length. A hook 310 is formed and a hook groove 320 having a predetermined depth is formed on the outer circumferential surface of the filter binding body 300 at intervals in the longitudinal direction of the filter binding body 300.

In addition, a binding body O-ring groove 330 is formed on the circumferential surface of the point passing the hook groove 320 from the fixing hook 310 toward the rear end of the filter binding body 300, (330) is fitted with a coupling body O-ring (340) as shown in FIG. 2 to seal between the outer circumferential surface of the filter binding body (300) and the inner circumferential surface of the piston (200).

Here, the reason for the sealing is that the injection liquid is discharged out of the body cylinder 100 through the space between the piston 200 and the body cylinder 100 when the injection liquid, that is, the chemical liquid is sucked into the syringe or discharged out of the syringe Or to be prevented from flowing into the inner hollow space of the piston 200.

A curved surface protrusion 350 is formed on an outer circumferential surface of the filter binding body 300 opposite to the fixed hook 310 so as to protrude in the circumferential direction.

The curved protrusion 350 has a substantially semicircular cross section.

In addition, one end of the compression spring SP is firmly fixed to the rear end of the filter binding body 300.

Therefore, the filter binding body 300 pushes the tip of the filter binding body 300 as far as possible to the front end while being inserted into the piston 200, and the curved protrusion 350 is forcedly assembled while being over the curved surface 240, The filter binding body 300 can not be pulled any more because of the curved jaws 240 and is kept in a state receiving the compressive force of the compression spring SP in the engaged state.

As long as the elastic force of the compression spring SP is controlled so that the curved protrusion 350 does not artificially exceed the curved protrusion 240, that is, the external force is applied to the curved protrusion 350, The compression force of the compression spring SP must be designed so as not to exceed the curved protrusion 240 and the compression force of the compression spring SP must be designed So that the filter binding body 300 is pulled and drawn to the plug 360.

Thus, the filter binding body 300 is always in a state in which the curved surface protrusion 350 is caught by the curved surface 240 as shown in the figure at the initial stage of assembly, that is, before use.

When the filter binding body 300 is forcibly inserted into the piston 200, the curved surface protrusion 350 is restricted by the right angle jaw 230, so that the curved protrusion 350 is not detached through the tip of the piston 200.

Meanwhile, a filter fixture 400 is inserted into the spout 110 of the body cylinder 100.

The filter fixture 400 is a substantially 'a' shaped member and is inserted into the interior of the 'a' spout 110, so that the filter fixture 400 is inserted into the spout 110 opposite the wide body cylinder 100, Fitted into the next spout (110), and then fixed in a forced fit manner.

The filter fixture 400 includes an insertion portion 402 to be inserted into the spout 110 and a diameter enlarged portion 404 to be relatively shortened at a rear end of the insertion portion 402, 404 are caught inside the spout 110 and are fixed to the tip of the spout 110 without being detached.

In this case, a fixing o-ring 410 (see Fig. 2) is provided at the boundary between the insertion portion 402 and the enlarged diameter portion 404, and the fixing o-ring 410 is disposed on the o-ring installation space 420.

That is, the airtightness is maintained by sealing between the inner diameter stepped portion TR of the spout 110 and the boundary portion at the boundary portion between the insertion portion 402 and the enlarged diameter portion 404.

A fluid passage 430 is formed in the insertion part 402 and a needle insertion part 440 is provided at the tip of the insertion part 402 so that one end of the injection needle N (see FIG.

The inner diameter of the enlarged diameter portion 404 is a cylindrical space having a diameter larger than the diameter of the chemical liquid flow path 430, and the filter member 500 is inserted into the inner diameter.

Particularly, at the end of the diameter portion 404, a hooking step 450 is formed along the periphery so that the fixing hook 310 can be hooked in the subsequent operation.

At this time, the fixing hook 310 is formed so that the hook portion is directed outwardly of the circumference, and the hooking jaw 450 is formed toward the inside of the circumference.

Therefore, the fixing hook 310 is inserted into the inner diameter of the enlarged diameter portion 404, and then the hook portion is hooked on the hooking hook 450.

2, a spout stop 112 is protruded from the inner diameter of the spout 110 into which the enlarged diameter portion 404 is inserted, and the outer diameter of the enlarged diameter portion 404 is caught by the spout stopper 112 The spout stopper 406 is formed so that the spout stopper 406 can be moved over the spout stopper 112 only when a pressing force equal to or greater than a predetermined value is generated. The spout stopper 112 is not a right angle stopper The locking protrusion 406 is also a semicircular protrusion, so that it can easily be moved if a force exceeding a certain level is applied.

3, the filter member 500 includes a fixing member 510 inserted into the enlarged diameter portion 404 of the filter fixing member 400 and fixed in a forced fitting manner, And a main filter 530 embedded in the silicon filter 520. The silicon filter 520 is fixed to the stationary rods 512 of the silicon filter 520,

At this time, the fixing table 510 has a cylindrical shape with a perforated space FW in which a fluid can flow in a circumferential direction as shown in the figure, and a circumferential cross-shaped protrusion. The center hole has a first center hole 514, And has a shape in which the fixing rods 512 protrude at intervals of 90 degrees around the first center hole 514.

In this case, the ends of the cross-shaped protrusions are fixed to the inner diameter of the enlarged diameter portion 404 in an interference fit manner. Since they have a slight elasticity, they can be easily fitted and fixed.

A second center hole 524 is formed in the center of the silicon filter 520 and a fixing rod 512 is fitted around the second center hole 524 in accordance with the fixing rod 512. [ A plurality of protrusions 522 are formed on the outer surface of the protrusion 522. A circular protrusion 526 is formed on the outer side of the protrusion 522 in a cylindrical shape so as to have a space therein. A fin portion 528 is formed.

Since they are all formed of silicon material, the fin portion 528 may be flapping.

2, when the internal pressure of the body cylinder 100 is lowered by pulling the piston 200, the chemical liquid flows into the body cylinder 100 through the injection needle N. At this time, The chemical liquid that has flowed through the FW is sucked up by pushing up the fin portion 528 and deforming it into the illustrated shape.

On the other hand, when the piston 200 is pushed and the chemical liquid is injected, the pin portion 528 comes into close contact with the inner diameter INT of the enlarged diameter portion to prevent the perfusion space FW.

The main filter 530 is inserted into and fixed to an inner space formed by the protrusions 526 of the silicon filter 520 as a filter. A third center groove 534 is formed at a predetermined depth in the center of the main filter 530, It is preferable to form it so as to be concentrated and discharged to this portion at the time of discharge. In addition, a large number of rod holes 532 through which the fixing rod 512 is inserted are formed around the third center groove 534.

3, the third center hole 534 'is passed through the third center hole 534', and a portion of the third center hole 534 'passing through the third center hole 534' 536 may be fixed integrally. In this case, it is not necessary to form the entire main filter 530 as a filter. Even if the entire main filter 530 is formed as a filter, if the filter 536 maintains the level of the HEPA filter, It might be.

Thus, when the silicon filter 520 and the main filter 530 are sequentially fitted and assembled to the fixing table 510, one filter member 500 is formed. The filter member may include a first center hole 514 which is inserted into and fixed to the enlarged diameter portion 404 and is formed at the center of the first center hole 514, A flow space FW formed so as to allow a fluid to flow outside the periphery between the protruding portion 518 and the protruding portion 518 and a first center hole 514 And a fixing rod 512 protruding from the cross-shaped protrusion 518 at an interval of 90 degrees in a direction perpendicular to the protrusion 518. The protrusion 518 and the protrusion 518 ) Has a fixing table 510 formed into a curved shape so as to have a circular shape.
A second center hole 524 formed at the center so as to communicate with the first center hole 514 and a second center hole 524 formed around the second center hole 524 such that the fixing rod 512 is fitted around the second center hole 524 A protruding portion 526 protruding from the outer circumferential surface of the protruding portion 526 in such a manner as to have a larger diameter so as to form a space therein, And a silicon filter 520 formed with a larger diameter and capable of flowing to form a fin 258 which is in close contact with or separated from the enlarged diameter portion INT.
The silicon filter 520 is inserted into and fixed to an inner space formed by the protrusions 526 of the silicon filter 520 and penetrates the center of the silicon filter 520 to communicate with the first and second center holes 514 and 524. A third center groove 534 'in which a sieve filter 536 consisting of a wave filter is formed up to a point spaced apart from the second center hole 524 by a predetermined distance, And a main filter (530) including a rod hole (532) penetratingly formed corresponding to the fixing rod so as to be fitted in the main filter (512)
When the internal pressure of the body cylinder 100 is lowered by pulling the piston 200 when the chemical liquid is sucked in, the chemical solution flowing into the perfusion space FW through the injection needle N is adhered to the in- The pin portion 528 is pushed up and sucked.
In addition, when the chemical liquid is injected, the pin portion 528 is brought into close contact with the inward enlarged portion INT by the pressure of the liquid medicine pushed by the piston 200 to seal the perfusion space FW, Only through the first and second center holes 514 and 524 and the third center groove 534 formed at the center of the spout 110,
And the foreign matter that may be present in the chemical liquid is caught by the sieve 536 of the main filter 530.

The present invention having such a configuration has the following operational relationship.

First, the process of sucking the chemical liquid into the body cylinder 100 is as described above, and corresponds to the example shown at the top of FIG.

Of course, the state before the chemical liquid is sucked is inserted into the body cylinder 100 while the filter binding body 300 is loaded at the inner end of the piston 200, and the fixing hook 310 of the filter binding body 300 is inserted into the filter cylinder 300, (Not shown) is hooked to the hooking jaw 450, although it is in a state of being near to the hook 500,

Therefore, in the chemical liquid suction process, the piston 200 is pulled while the injection needle N is immersed in the ampoule or the container containing the chemical liquid in a state where the injection needle N is fixed by fitting the needle N into the needle insertion portion 440, And is sucked up into the cylinder 100.

At this time, even if there is microscopic foreign matter that can not be seen in the chemical solution, it is sucked into the body cylinder 100 together with the chemical solution, and then completely filtered by the filtering wire 536 of the main filter 530 Because.

When the piston 200 is pressed while the chemical liquid is sucked, the chemical liquid is pushed and moved toward the spout 110 by the pressure applied by the piston 200.

In the present invention, both the fixing table 510 and the silicon filter 520 constituting the filter member 500 have the first and second center holes 514 and 524 in the center, and the main filter 530, Since the third center groove 534 is formed at the center, the chemical solution is concentrated there, and is exited through the third center groove 534.

In other words, as shown in FIG. 4, since the inside of the injector is cylindrical, part of the drug solution moves to other places except the center, that is, to the edge. In this case, the fin part 528 is pressed The liquid medicine is directed to the injection needle N only through the center third center groove 534 and the second center hole 524, 514, because the liquid is completely sealed tightly against the neck portion INT.

Therefore, in the prior art, since the flow path through which the chemical liquid flows out has to be drawn out through the multi-step flow path while drawing an approximately 'S' shape, the injection is very difficult and difficult due to a great pressure, It is very easy and convenient to put the injection because it does not take much pressure because it exits through.

At this time, the foreign matter is filtered through the main filter 530.

However, when the third center hole 534 'is formed, since the filtering wire 536 is integrally provided, the foreign matter filtering characteristics can be further finely maintained.

Of course, the integral molding of the screen 536 can be easily realized by the insert molding method as described above.

When the drug solution is injected in this way, the user pulls the syringe from the patient's injection vein.

Then, the piston 200 is strongly pressed once more by holding the body cylinder 100.

4, the fixing hooks 310 are hooked on the hooking tabs 450 to engage with each other, and at the same time, the hooking jaws 450 are inserted into the hooking grooves 320 (see FIG. 1) Come in.

4, which is one side of the hook groove 320, and the 'B side', which is the front end surface of the hooking hook 450, are perpendicular to each other, so that the forward movement of the filter binding body 300 .

However, the relatively unrestrained piston 200 is further advanced in the " A "direction, while at the same time the force reversely pushes back the filter binding body 300 so that the filter binding body 300 moves in the" Lt; / RTI >

In this process, the curved surface protrusion 350 of the filter binding body 300 passes over the curved surface protrusion 240 formed on the inner peripheral surface of the piston 200. This is the result of an external force acting well enough.

Since the curved protrusion 350 now has no force to interfere with the compressive force of the compression spring SP at the moment when the curved protrusion 350 crosses the curved protrusion 240, the filter binding body 300 pulls the hooked filter fastener 400 And quickly attracted to the opposite side of the spout 110.

At this time, the injection needle N fixed to the tip of the filter fixture 400 is also pulled together, and the injection needle N itself is automatically drawn into the body cylinder 100 as in the lowermost example of FIG. 2, There is no fear that the needle will be stuck to the needle N due to the carelessness of the posture, thereby relieving the anxiety and improving the safety.

100: Body cylinder 200: Piston
300: filter binder body 400: filter holder
500: filter element

Claims (4)

A body cylinder 100 having a spout 110 formed at a tip end thereof with a stepped-down diameter and a flange 120 at a rear end thereof; And a piston (200) inserted into the body cylinder (100) and reciprocating to generate a pressure to suck and discharge fluid through the spout (110).
The piston 200 is formed in a hollow cylindrical shape, and the filter binding body 300 is fixed to the inner diameter of the distal end thereof;
A filter fixture 400 is inserted and fixed in the spout 110 of the body cylinder 100;
A filter member 500 is provided inside the filter fixture 400;
An O-ring is provided between the inner diameter of the body cylinder 100 and the outer diameter of the distal end of the piston 200 and between the outer diameter of the distal end of the piston 200 and the outer diameter of the distal end of the filter binding body 300,
The filter binding body 300 includes:
And a curved surface protrusion 350 which is engaged with a curved surface protrusion 240 protruding from the inner diameter of the piston 200 protrudes around the rear end of the piston 200. A rear end of the fixed hook 310 protrudes from one end And the other end of the compression spring SP is configured to be fixed to a stopper 360 fitted to the inner rear end of the piston 200;
The filter fixture (400)
The insertion portion 402 has a diameter larger than that of the insertion portion 402 and is hooked to the fixing hook 310 at a rear end thereof. The insertion portion 402 is inserted into the smallest opening of the spout 110 and has a needle insertion portion 440. And an enlarged diameter portion (404) formed with a fastening stop (450) and a large diameter portion (INT);
The filter member (500)
A first center hole 514 which is inserted into and fixed to the enlarged diameter portion 404 and formed at a center thereof, a first center hole 514 which is spaced apart from the first center hole 514 by a predetermined distance, A first center hole 514 and a cross-shaped protrusion 518, which are formed so as to allow a fluid to flow outside the periphery between the protrusion 518 and the protrusion 518, And a fixing rod 512 protruding from the protrusion 518 at an interval of 90 degrees in a direction perpendicular to the protrusion 518. The circumference between the protrusion 518 and the protrusion 518 has a circular shape A fixing table 510 formed in a curved shape;
A second center hole 524 formed at the center so as to communicate with the first center hole 514 and a second center hole 524 formed around the second center hole 524, A protrusion 522 formed to penetrate through the fixing rod 512, a protrusion 526 protruding in a cylindrical shape with a larger diameter such that a space is formed inside the protrusion 522, and a protrusion 526 formed outside the protrusion 526 A silicon filter 520 formed with a larger diameter and flowable to form a fin portion 528 which is in close contact with or separated from the enlarged diameter portion INT;
The silicon filter 520 is inserted into and fixed to an inner space formed by the protrusions 526 of the silicon filter 520 and penetrates through the center so as to communicate with the first and second center holes 514 and 524. A third center hole 534 'in which a sieve filter 536 composed of a wave filter is formed up to a point spaced apart from the second center hole 524 by a predetermined distance, And a main filter (530) including a rod hole (532) penetratingly formed corresponding to the fixing rod so as to be fitted in the main filter (512)
When the internal pressure of the body cylinder 100 is lowered by pulling the piston 200 when the chemical liquid is sucked in, the chemical solution flowing into the perfusion space FW through the injection needle N is adhered to the in- The pin portion 528 is pushed up and sucked,
The pin portion 528 is brought into close contact with the inward portion of the enlarged diameter portion INT by the pressure of the chemical liquid which is pushed when the piston 200 is pushed in the injection of the chemical liquid to seal the perfusion space FW, By moving in the direction of the spout 110 only through the first and second center holes 514 and 524 and the third center groove 534 formed in the center hole 534,
Characterized in that foreign matter which may be present in the chemical liquid is caught by the sieve (536) of the main filter (530). delete The method according to claim 1,
Wherein an o-ring is further provided between the boundary portion between the insertion portion and the enlarged diameter portion and between the inward-centering portion of the spout and the injection needle and the injection-liquid filtering function.
The method according to claim 1,
Wherein a spout jaw is further formed on the inner diameter of the spout and a hook protrusion is formed on the outer diameter of the filter fixing hole so as to engage with the spout jaw in a circumferential direction.
KR1020160106996A 2016-08-23 2016-08-23 Syringe with a needles pulling function and at the same time injection filtering KR101720986B1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004035120A2 (en) * 2002-10-18 2004-04-29 Advanced Protective Injection Systems B.V. Injection syringe with retractable needle
US7717876B2 (en) * 2004-11-24 2010-05-18 Isidoro Mazzara Retractable needle safety syringe
KR101354451B1 (en) 2012-12-03 2014-01-28 김근배 A filter syringe
KR20150000096U (en) 2014-09-26 2015-01-07 (주)신아메드 Disposable safety syringe having filterpaper for moving
KR101572663B1 (en) * 2015-05-20 2015-11-27 (주)상아프론테크 Filter structure for syringe and syringe having the same
KR101596941B1 (en) * 2015-08-24 2016-03-07 (주)상아프론테크 Filter structure for syringe and syringe having the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004035120A2 (en) * 2002-10-18 2004-04-29 Advanced Protective Injection Systems B.V. Injection syringe with retractable needle
US7717876B2 (en) * 2004-11-24 2010-05-18 Isidoro Mazzara Retractable needle safety syringe
KR101354451B1 (en) 2012-12-03 2014-01-28 김근배 A filter syringe
KR20150000096U (en) 2014-09-26 2015-01-07 (주)신아메드 Disposable safety syringe having filterpaper for moving
KR101572663B1 (en) * 2015-05-20 2015-11-27 (주)상아프론테크 Filter structure for syringe and syringe having the same
KR101596941B1 (en) * 2015-08-24 2016-03-07 (주)상아프론테크 Filter structure for syringe and syringe having the same

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