KR101551400B1 - Syringe having dual micro filters - Google Patents

Abstract

The present invention relates to a syringe having a double microfilter which can be safely used by maximizing the filtering efficiency of fine debris generated in an ampule or vial by disposing a microfilter.
The present invention relates to a syringe body including a piston inserted into a cylinder part and a cylinder part; A hub coupled to a distal end of the cylinder; An injection needle having one end coupled to a distal end of the hub; A protective cap including a first portion surrounding the needle and a second portion coupled to the hub; A first micro-filter disposed between the cylinder and the hub; And a second microfilter disposed inside the protective cap.

Description

Syringe having dual microfilters < RTI ID = 0.0 >

The present invention relates to a syringe, and more particularly, to a syringe having a microfilter in which a microfiber piece of ampoule mixed with an injection liquid is injected from a syringe (for example, a vial in which an opening is sealed by an ampoule or a rubber stopper) And to a syringe having a dual microfilter capable of filtering an injected liquid when the injected liquid is discharged from a syringe.

BACKGROUND ART [0002] Syringes commonly used in the market today include a syringe body composed of a cylinder part and a piston part so that an injection liquid can be charged, and a needle provided at the tip of the syringe body.

Such conventional syringes are used to collect injections from ampoules or vials through injection needles in order to administer injections (drugs) to a human body. Many minute debris (fine glass debris or fine rubber debris) There is a problem that it is sucked into the part. In particular, the larger the hole of the injection needle, the greater the suction amount of the inhaled micro debris.

The above-mentioned micro-debris may cause not only necrosis of body tissue but also pulmonary granuloma, phlebitis and thrombosis when it is introduced into the body together with the injection solution. Further, if left untreated, micro-paralysis, general paralysis, heart attack or cancer There was a fatal problem.

1, the conventional syringe 10 includes a cylindrical cylinder portion 11 having a space therein for storing an injection liquid therein, a neck portion 15 as a tip portion of the cylinder portion 11, A needle 33 coupled to the distal end of the hub 31 and a cap 35 for covering and protecting the needle 33. The injector 10 is inserted into the cylinder 11 so as to be able to move back and forth so as to suck the injection liquid into the cylinder 11 or to discharge the injection liquid stored in the cylinder 11 to the outside through the injection needle 33 And a piston (13) for allowing the piston to rotate.

In order to inject the injection solution into the patient with the conventional syringe 10 as described above, the piston 13 is first moved toward the front of the cylinder part 11 in the cylinder part 11, The plunger 14 is brought into close contact with the inside of the cylinder portion 11 forward. Thereafter, an impact is applied to the neck a1 of the ampoule vial A containing the predetermined injection liquid b to break the ampoule neck a1 to open the ampoule, and the injection needle 33 When the piston 13 is retracted while being immersed in the injection liquid b in the ampule, the injection liquid b is sucked into the cylinder portion 11 and charged.

However, as shown in FIG. 2, a large number of minute glass fragments K1 generated when breaking the neck a1 of the ampule glass bottle A are scattered, and a part thereof flows into the injection solution b of the ampule glass bottle A . In this case, a plurality of fine glass fragments K1 which have entered into the injection liquid b are mixed with the injection liquid b into the cylinder 11 when the injection liquid b is sucked into the syringe 10, As described above, when a large number of fine glass fragments (K1) are injected into a patient together with the injectable solution (b), there is a problem that the adverse effect is adversely affected on the patient's health.

3, when the injection needle 33 penetrates the rubber stopper D of the vial C and inserts the rubber stopper D into the container, A micro-rubber debris K2 is generated from the micro-rubber debris K2, and the micro-rubber debris K2 is mixed with the injection fluid b. The fine rubber debris K2 is generated by a coring phenomenon (a phenomenon in which rubber pieces of rubber rubber are generated by needle holes).

In order to solve such a problem, Korean Patent Laid-Open Publication No. 10-2005-0108169 proposes a syringe having a filter for protecting the injection needle from being wrapped around the outer side of the fixing member and for preventing foreign matter from entering and antibacterial treatment have. The syringe having such a configuration filters the glass particles of the ampule by the filter when the injection liquid is sucked, but the injection process is very troublesome because the injection is required after removing the filter with the ampule glass particles when the injection is made to the patient.

In addition, in Korean Patent No. 10-981586, the safety filter tip equipped with the filter is fixed to the neck portion 15 of the syringe to suck the injection liquid from the ampoule. However, after the injection liquid is sucked, The injection procedure is troublesome because the injection needle is inserted and then the injection is made.

Meanwhile, a process in which a conventional filter needle (Korean Patent Laid-Open No. 10-1012-0087587) is used by a user such as a nurse goes through the following nine steps.

(1) remove the package, (2) remove the safety cap, (3) inhale the injection, (4) remove the filter needle, (5) remove the safety needle from the needle, (6) insert the needle into the syringe, ⑧ Separate the injection needle, ⑨ Discard.

In order to solve the problem of this process, the filter cap method of Korean Patent Laid-Open No. 10-2005-0108169, which is a filter cap method, is used by a user such as a nurse in the following seven steps.

(1) remove the packaging, (2) remove the safety cap, (3) inhale the injection, (4) remove the filter cap, (5) inject, (6) remove the needle, and (7) discard.

This filter cap method is improved than the filter needle, and the use is simplified by reducing the number of steps. In addition, there is a possibility of contamination or needle sticking in the process of replacing the needle.

However, such a conventional filter cap method is problematic and needs to be improved.

Conventionally, a filter cap is fixedly attached to a penetration portion of a housing by a jaw protruding from a filter, and has a portion in close contact with the injection needle hub of the injection needle assembly to form a negative pressure. However, in the conventional filter cap, the thickness of the filter becomes thicker in order to prevent the filter from being pulled out of the jaw by an insertion method in which the filter is fixed by the jaws. There is a problem that a large amount of force is required for the suction because the filter is thick. The diameter of the penetration portion is large and the outer diameter of the filter cap is so large that the hole and the outer diameter of the ampoule become similar to each other, thereby causing a problem of insertion and increasing the possibility of contamination. In addition, since the volume of the closed space inside the housing becomes large due to close contact with the needle hub, it becomes difficult to form a negative pressure, which makes the injection of the injection difficult.

Moreover, since the filter is fixed by the inner jaw as well as the above-described problem of the use, the manufacturing process becomes complicated. In order to mount the filter on the inside, the housing is made of two or more parts rather than one part, so it is necessary to take the method of assembling the filter after mounting it, or it is necessary to separate the jaws to fix the filter after the filter is inserted into the housing have.

On the other hand, Korean Patent No. 10-1243396 relates to a filter cap, in which an injection fluid inlet is formed on the entire surface of the injection needle cap, and a filter is attached to this communication portion by a melt adhesion method. However, such a conventional technique requires a process of melting and bonding a small membrane filter to the tip of the cap. Further, since the filter is exposed to external pollution and the tip of the cap is sharpened with a diagonal line, there is a problem that it can not be used as a filter needle for a vial because a rubber cap such as a vial can not be easily pierced with a plastic cap. As a result, there is a problem that the user has to use the filter needle separately for the ampoule and the vial, and that there is a problem of confusion.

In order to solve the above problems, it is an object of the present invention to provide a syringe having a double microfilter which can be safely used by maximizing the filtering efficiency of micro-fragments generated in an ampule or vial by disposing a micro- .

To achieve the above objects, there is provided a syringe main body including a piston inserted into a cylinder part and a cylinder part; A hub coupled to a distal end of the cylinder; An injection needle having one end coupled to a distal end of the hub; A protective cap including a first portion surrounding the needle and a second portion coupled to the hub; A first micro-filter disposed between the cylinder and the hub; And a second microfilter disposed on the inner side of the protective cap.

The first micro-filter is fixed to the inner side of the hub and can be supported at the tip of the cylinder.

The second micro-filter may have one side fixed to the inner tip of the protective cap and the other side fixed to the hook protrusion spaced from the inner tip of the protective cap.

The first microfilter and the second microfilter may be formed into blocks through plastic working of the porous plastic granules. In this case, it is preferable that the first micro-filter and the second micro-filter are formed to filter particles of 5 m or more.

The hub may be fixedly secured such that its outer circumferential surface is in close contact with the inner circumferential surface of the second portion of the protective cap. In this case, the inner diameter of the first portion of the protective cap is preferably 1.1 to 1.3 times the outer diameter of the injection needle.

A cut-off handle is formed at an end of the first portion of the protective cap. When the handle is cut off from the first portion, the injection liquid inflow hole formed at the tip of the first portion can be opened. In this case, it is preferable that the distal end portion of the first portion cut out of the handle portion is formed of an oblique edge portion. It is preferable that the outer diameter of the injection liquid inflow passage is 4 mm or less.

As described above, according to the present invention, there is an advantage that the reliability of the product can be improved by maximizing the filtering efficiency of the micro-fragment of the ampule or vial through the filter disposed in the protective cap and the filter disposed in the hub.

In addition, the present invention is characterized in that a simple disc-shaped micro filter is fixedly attached to the hub and the protective cap, respectively, so that a simple and robust filter fixing can be performed without any additional melting operation, ultrasonic operation, So that the efficiency of fabrication can be increased.

Furthermore, the present invention can reduce the user's scanning process to six steps of removing the packaging, removing the handle of the protective cap, sucking the injection, removing the protective cap, injecting the ink, It is possible to reduce the consumption of excessive needles because there is no need to distinguish between injection needles for injecting injections and injection needles for injecting injections as in the prior art by simultaneously injecting injections and injecting injections with a single injection needle, A cost saving effect can be obtained.

Further, according to the present invention, a micro filter is attached to a protective cap, which is a lid of a needle, so that a user can secure the safety of a user by reducing the risk of being stuck in a needle of a metal material when injecting an injection liquid into a cylinder portion of a syringe.

1 is a schematic cross-sectional view showing a conventional syringe.
Fig. 2 is a schematic view showing a state where fine glass fragments generated when breaking the neck of an ampule are mixed with an injection solution. Fig.
FIG. 3 is a schematic view showing a state in which a micro-rubber debris generated when a rubber stopper of a vial is pierced with a needle is mixed with an injection solution.
4 is an exploded perspective view of a syringe according to an embodiment of the present invention.
5 is an end view of the syringe according to an embodiment of the present invention.
6 is an enlarged photograph showing the filter shown in Fig.
FIGS. 7A through 7D are schematic views illustrating a process of using a syringe according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a configuration of a syringe having a dual microfilter according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 4, a syringe 100 according to an embodiment of the present invention includes a syringe body 110, a hub 130, a needle 150, a protective cap 170, a first microfilter F1, And a second micro-filter F2.

Referring to FIG. 5, the syringe body 110 includes a cylinder portion 111 and a piston 113. The cylinder 111 has a neck portion 112 at the distal end thereof to which the hub 130 is pushed in a pressured state. The injection fluid is charged into the cylinder 111 and the piston 113 is slidably inserted therein.

The piston 113 is provided with a plunger 115 made of a rubber material at its tip end and the side surface of the plunger 115 is brought into close contact with the inner circumferential surface of the cylinder portion 111, Or through the neck portion 112 to the outside of the cylinder portion 111.

The hub 130 is a member for connecting the injection needle 150 to the cylinder portion 111 and has a cylindrical shape narrowing toward the front side and a rear end of the injection needle 150 is fixedly coupled to the distal end. The hub 130 has a first microfilter F1 fixedly coupled to an inner distal end thereof.

In this case, the first micro-filter F1 may have a substantially disc shape. As shown in FIG. 6, the first microfilter (F1) is formed by plastic molding the porous plastic granules and is chemically stable, so that it does not react with the injection liquid (b) and is harmless to the human body. The first microfilter F1 filters the fine glass fragments K1 of the ampule A and the fine rubber fragments K2 of the vial C of 5 mu m or more in consideration of the fact that the diameter of the capillary is 10 mu m, It is preferable to be formed so as to be able to do so.

When the neck portion 112 is inserted into the hub 130 to perform the scanning action, the first microfilter F1 is inserted into the front end of the hub 130. However, when the neck portion 112 is inserted into the hub 130, And the stepped portion 131 formed on the inner side of the hub 130 supports the other side of the first microfilter F1 so that the first microfilter F1 May be stably fixed within the hub 130. [

The injection needle 150 is communicably coupled to the hub 130 and has a predetermined length.

The protective cap 170 includes a first portion 171 that surrounds the injection needle 150 so that the injection needle 150 is not exposed to the outside and a second portion 171 that is extended from the first portion 171, And a second portion 173 to be fitted.

In the first portion 171, a second microfilter F2 having a substantially columnar shape is disposed inside the tip end.

The second microfilter F2 is inserted into the inner tip of the first portion 171 through the second portion 173 of the protective cap 170 and inserted. The other end of the second microfilter F2 is engaged with the engaging projection 176 formed on the inner circumferential surface of the first portion 171 adjacent to the distal end of the first portion 171, (177). Accordingly, the second microfilter F2 can be stably fixed to the inside of the first portion 171 without movement during infusion or administration of the injection liquid, and can perform a filtering function.

The second micro-filter F2 is preferably made of the same material as the first micro-filter F1.

The second microfilter F2 may filter the injection fluid together with the first microfilter F1 to maximize the filter efficiency. Further, since the first and second microfilters F1 and F2 are made of a porous material, the flow resistance to the injection liquid can be reduced. Accordingly, the injection liquid can easily flow into the cylinder 111 and can be easily discharged (shot) from the cylinder 111. [

In the first portion 171, a passageway 175 through which the injection liquid flows is formed in a distal end portion where the second microfilter F2 is disposed. In this case, the outer diameter of the injection liquid inflow passageway 175 is used by breaking the neck a1 of the ampule A. In this case, since the typical inner diameter of the opening formed in the ampule A is approximately 4 mm to 10 mm, The outer diameter of the passage 175 is preferably 4 mm or less.

Further, the first portion 171 is detachably coupled to the distal end of the injection liquid inflow passageway 175, with a knob 179 for closing the injection liquid inflow passageway 175. The handle 179 is preferably formed to be wide enough to be easily grasped by the user.

Accordingly, when the user pulls the handle 179, the tip of the protective cap 170 (that is, the tip of the injection liquid inflow passage 175) is cut out from the tip of the protective cap 170, (178).

In this case, the edge portion 178 serves as an inlet for sucking the injection liquid b of the ampule A into the injection liquid inflow passage 175. The edge portion 178 is formed in an oblique direction so as to suck up the injected liquid b contained in the ampoule A so as to be in close contact with the corner of the ampoule A so that the injected liquid can be efficiently sucked.

The first portion 171 is smoothly formed on the inner circumferential surface to facilitate insertion of the injection needle 150 or the second microfilter F2. In this case, by reducing the sound pressure by minimizing the distance between the inside of the first portion 171 and the injection needle 150, even after sucking the injection liquid b from the ampule A1 into the cylinder portion 111, It is preferable that the injection liquid (b) is again sucked into the ampule (A) so as not to remain on the outer surface of the injection needle (150) or inside the first part (171). For example, the inner diameter of the first portion 171 may be approximately 1.1 to 1.3 times larger than the outer diameter of the injection needle 150.

The second portion 173 is configured to prevent air from leaking between the inner circumferential surface of the second portion 173 and the outer circumferential surface of the hub 130 when the hub portion 130 is engaged with the inner circumferential hub 130 of the second portion 173 So that it is forced to be in surface contact with the outside.

Hereinafter, with reference to FIGS. 7A to 7D, the process of using a syringe having a dual microfilter according to an embodiment of the present invention will be described in sequence.

First, the hub 130 is inserted into the neck portion 112 of the syringe 100, and the handle portion 179 is pulled as shown in FIG. 7A to open the distal end portion 175a of the injection fluid inflow passage 175.

7B, the first portion 171 of the protective cap 170 and the injection liquid inflow passage 175 (FIG. 7B) are inserted through the opening of the ampule A containing the injection liquid (b) ) Is inserted into the ampule (A). Subsequently, the piston 113 is pulled to suck the injection liquid (b) into the cylinder portion 111.

At this time, the injection liquid b flows into the injection liquid inflow passage 175 and is then filtered through the second microfilter F2 while the fine glass fragments K1 contained in the injection liquid b are firstly filtered, The microfluidic fragment K1 remaining in the injection liquid b is secondarily filtered when the microfluidic fluid passes through the first microfilter 170 and then flows into the hub 130 through the first microfilter F1.

Thereafter, the first portion 171 of the protective cap 170 and the injection liquid inflow passage 175 are pulled out from the ampule A. Next, when the injection liquid (b) charged into the cylinder 111 of the syringe 100 is administered to the body, the protective cap 170 is detached from the hub 130 as shown in FIG. 7C.

7D, the injected liquid b charged into the cylinder 111 is injected into the first microfilter F1 attached to the distal end of the hub 130 by pushing the piston 113 of the injector 100 toward the hub 130. Then, (B) is administered to the body through the injection needle (150).

In this case, since the injection liquid (b) is discharged through the clean first microfilter (F1) without being discharged through the second microfilter (F2) in which the minute debris is caught, the flow resistance of the injection liquid (b) ) Can be smoothly performed.

Meanwhile, when the injection liquid b contained in the vial C is sucked through the syringe 100 according to an embodiment of the present invention, the second microfilter F2 is mounted to puncture the rubber stopper D The protective cap 170 is removed from the hub 130 and removed. The rubber stopper D is then inserted into the rubber stopper D while pressing the injection needle 30 at an oblique angle to the surface of the rubber stopper D to minimize the rubber debris K2 generated by the coring phenomenon after the injection needle 150 is exposed. Respectively.

When the rubber stopper D is pierced by the injection needle 150 and then the piston 113 is pulled, the injection fluid b is filtered through the first microfilter F1 mounted on the hub 130, (Not shown).

In the case of injecting injected liquid b injected into the cylinder 111 into the body, after removing the hub 130 and the injection needle 150 with the first microfilter F1 used once, It is preferable to replace the needle with a new hub 130 having a micro-filter F1 and a needle 150 after use.

As described above, according to the present invention, the first and second microfilters F1 and F2 are disposed at intervals to double filter the injection liquid (b) to perfectly satisfy the basic filtration function.

In addition, by using the injection needle 150 with the injection of the injection liquid and the injection of the injection liquid at the same time, the injection action process is shortened and the injection needle (with the first micro filter) and the injection needle The use of excessive needles derived from the use of two needles 150 for a single injection operation can be reduced and the cost of consumables can be reduced.

In addition, according to the present invention, the first and second microfilters formed of the filter block, which is an injection product, are assembled into the hub 130 and the protective cap 170 by press-fitting them, respectively, so that the conventional ultrasonic wave, The productivity can be remarkably improved and the production cost can be reduced.

As described above, the present invention has been described by reference to the preferred embodiments and drawings, but it should be understood that the present invention is not limited to these embodiments, and various changes and modifications may be made without departing from the spirit and scope of the present invention by those skilled in the art. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the appended claims.

111: cylinder part 112: neck part
113: piston 115: plunger
130: hub 131, 177:
150: Needle 170: Protective cap
171: first part 173: second part
175: Syringe inflow passage 176:
F1: first micro filter F2: second micro filter

Claims (10)

A syringe body including a cylinder and a piston inserted into the cylinder;
A hub coupled to a distal end of the cylinder;
An injection needle having one end coupled to a distal end of the hub;
A protective cap including a first portion surrounding the needle and a second portion coupled to the hub;
A first micro-filter disposed between the cylinder and the hub; And
And a second microfilter disposed inside the protective cap,
Wherein a cut-off handle is formed at an end of the first portion of the protective cap, and an injection fluid inflow passage formed at a tip of the first portion is opened when the knob is cut out from the first portion. syringe. The method according to claim 1,
Wherein the first micro-filter is fixed to the inside of the hub and is supported at the tip of the cylinder. The method according to claim 1,
Wherein the second microfilter is fixed to the inner tip of the protective cap at one side and is fixed to the engagement protrusion at the other side of the protective cap spaced from the inner tip of the protective cap. The method according to claim 2 or 3,
Wherein the first microfilter and the second microfilter are formed into a block by plastic working to form porous plastic granules. 5. The method of claim 4,
Wherein the first micro-filter and the second micro-filter filter particles having a size of 5 mu m or more. The method according to claim 1,
Wherein the hub is fixed by interference fit so that its outer circumferential surface is in close contact with the inner circumferential surface of the second portion of the protective cap. The method according to claim 6,
Wherein the inner diameter of the first portion of the protective cap is 1.1 to 1.3 times the outer diameter of the injection needle. delete The method according to claim 1,
Wherein the tip portion of the first portion cut out of the handle portion comprises an oblique edge portion. The method according to claim 1,
And the outer diameter of the injection liquid inflow passage is 4 mm or less.

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