KR101891223B1 - Filter assembly for interior and safety syringe using the same - Google Patents

Abstract

The present invention relates to a safe syringe using an internal filter assembly, capable of effectively filtering out foreign substances such as glass or rubber pieces mixed with injection liquid as well as preventing a backflow of the filtered foreign substances by effectively controlling the inflow and discharge of the injection liquid. The present invention comprises: a syringe body (1) including a plurality of injection liquid discharge protrusions (10) divided in a radial form on the front side of an internal space, which is formed to store injection liquid, and a needle holder inserted into the front side; a piston (2) absorbing or discharging the injection liquid by moving forward or backward in the body; and a filter assembly (3) including a housing (30) installed in the upper part of the injection liquid discharge protrusions (10) to filter out foreign substances while preventing a backflow of the substances by including a hollow hole (300) in the center and a plurality of injection liquid outlets (301) formed on the edge, a check valve (31) combined with the hollow hole of the housing and controlling the inflow and discharge of the liquid through pressure from the piston, a microfilter (32) combined with the upper part of the housing (30) to filter out the foreign substances mixed with the injection liquid, and a check ball (33) stored inside the check valve (32) and controlling the inflow and discharge of the injection liquid by being moved forward or backward by the pressure from the piston.

Description

[0001] The present invention relates to a safety syringe using a built-in filter assembly,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety syringe using a built-in filter assembly, and more particularly, to a safety syringe using a built-in filter assembly for effectively controlling the inflow and outflow of an injection fluid during inflow and outflow of an injection fluid and effectively filtering out foreign substances such as glass fragments, And a safety syringe using a built-in filter assembly capable of preventing backflow of filtered foreign matter.

In general, a syringe includes a cylindrical syringe body formed with a space for storing an injection liquid therein, a piston for sucking or discharging the injection liquid while being advanced or retracted inside the syringe body, and an outer peripheral surface of a neck portion formed in front of the syringe body And a needle coupled to the tip of the needle holder.

In using such a conventional syringe, the upper portion of the ampoule containing the injection liquid is broken, the needle is pulled into the opened portion, and the piston is retracted so that the injection liquid in the ampoule is sucked into the syringe body. When the piston is inserted, the injection fluid in the cylinder is injected into the patient through the needle.

However, when the upper portion of the ampoule is opened in the process of inhalation of the injected liquid as described above, the glass fragments are scattered and a part thereof enters the inside of the ampoule. The glass fragments introduced into the ampoule are mixed into the injection liquid, It may cause side effects to the patient.

An example of a technique for solving such a problem is disclosed in Document 1 below.

The following Patent Document 1 discloses a syringe having a hub connected to a neck portion of a syringe, a syringe suction portion integrally projected on the front side of the hub, and a filter fixed to the inside of the hub, In the syringe tip, the hub has a locking protrusion formed inside thereof to closely contact the front surface of the filter, and a bushing is forcedly fitted on the rear surface of the filter to fix the filter to the hub, Characterized in that the space part is formed in the hub by forming a predetermined space and the space part is made to filter the glass particles over the whole front face of the filter so as to filter out the glass particles through the filter when the injection liquid is inhaled. Filter tips.

However, in the conventional technique as described above, when the injection liquid is sucked into the syringe, the filter tip is inserted, and when the injection liquid of the syringe is administered to the patient, the filter tip is removed and the new syringe tip is connected to the syringe, The inhalation and administration of the injection solution is troublesome and the filter tip is exposed to the outside, so that the external appearance is not so good, and it is exposed to the outside air and contaminated by bacteria.

In order to solve the above problems, Patent Document 2 filed by the applicant of the present application has a space formed therein for storing an injection solution therein, a neck portion for fitting a needle holder to one side thereof, A syringe body having a protruding jaw; A piston for sucking or discharging the injection fluid while being advanced or retreated within the syringe body; And a filter assembly supported by the squeezing jaw of the syringe body to filter foreign substances mixed in the injection liquid and prevent the filtered foreign substances from flowing backward; Wherein the syringe body is provided with a recess on an outer side thereof along the outer circumference of the neck portion, the filter assembly including a housing in which a hollow injecting liquid inlet is formed and a plurality of injecting liquid outlets are formed around the syringe body, And a micro filter which is connected to the upper portion of the housing and filters the foreign substances mixed in the injection liquid. The micro-filter according to claim 1, A safety syringe is disclosed.

However, in the technique of Patent Document 2, the inhalation and administration process of the injection liquid is simple, and the filter assembly is not exposed to the outside, so that contamination by bacteria is prevented. However, when the injection liquid is injected, There is a problem that the foreign matter flowing into the inlet of the housing while being opened is discharged through the opening and closing part together with the injection liquid.

Korean Registered Patent No. 10-0981586 (registered on Mar. 3, 2010) Korean Registered Patent No. 10-1680211 (Registered on November 22, 2016)

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a filter assembly in which a check valve accommodating a check ball is coupled to a housing, Which can effectively filter out foreign substances such as glass fragments or rubber stopper fragments and prevent the backflow of filtered foreign substances when the injection liquid is discharged.

The safety syringe using the built-in filter assembly according to the present invention includes a plurality of injection liquid discharge protrusions 10 formed radially in a front part of an inner space formed to store an injection liquid therein, and a needle holder is fitted A piston 2 for sucking or discharging the injected liquid while being moved forward or backward in the syringe body and a piston 2 provided at an upper portion of the injected liquid discharge projection 10 in the inner space of the syringe body, A housing 30 in which a hollow hole 300 is formed at a central portion and a plurality of injection liquid outlets 301 are defined around the periphery of the housing 30 so as to filter the foreign matter filtered and prevent the filtered foreign substances from flowing back; A check valve 31 which is coupled to the through hole in the through hole and controls the injection and discharge of the injection liquid while being opened and closed by the pressure of the syringe piston, A micro filter 32 coupled to the upper portion of the check valve 31 to filter the foreign substances mixed in the injection liquid, a check valve 31 which is accommodated inside the check valve 31 and is moved forward and backward by the pressure of the piston, And a filter assembly (3) having a filter (33).

In the present invention, the check ball or the flange of the check valve opens or closes the path of the injected liquid by the pressure of the piston, thereby enabling foreign substances such as glass fragments or rubber stopper pieces of the vial to be effectively filtered, It is possible to prevent the backflow of the refrigerant, thereby providing an excellent safety.

The present invention is advantageous in that the filter assembly is not exposed to the outside to prevent contamination by external air, and the manufacturing cost can be reduced and mass production can be achieved due to the miniaturization of the filter assembly.

1 is a cross-sectional view of a safety syringe using a built-in filter assembly of the present invention.
FIG. 2 is a sectional side view of a syringe body of a safety syringe using the built-in filter assembly of the present invention. FIG.
3 is an exploded perspective view of a filter assembly of a safety syringe using the internal filter assembly of the present invention.
4A is a sectional view showing a filter assembly operation of a safety syringe using the anti-magnetic filter assembly according to the present invention, FIG. 4A is a view showing a pulled-in state of the injection solution, and FIG.

The safety syringe using the filter assembly for internal use according to the present invention is characterized in that a plurality of injection liquid discharge protrusions 10 are radially formed in a front part of an inner space formed for storing an injection liquid therein, (1)

A piston (2) for sucking or discharging the injected liquid while being moved forward or backward in the syringe body,

A hollow hole 300 is formed in the center of the syringe body to prevent the foreign matter that has been mixed with the injection liquid from being filtered and to prevent the filtered foreign matter from flowing backward, A check valve 31 connected to the lower portion of the housing by a through hole to control opening and closing of the injection liquid while being opened and closed by the pressure of the syringe piston, A microfilter 32 coupled to the upper portion of the housing 30 to filter foreign substances mixed in the injection liquid and a micro filter 32 housed inside the check valve 31 and being moved forward and backward by the pressure of the piston, And a filter assembly (3) having a check ball (33) for controlling the filter assembly (3).

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

FIG. 1 is a cross-sectional view of a safety syringe using the built-in filter assembly of the present invention, FIG. 2 is a cross-sectional view of the syringe body of the safety syringe using the built-in filter assembly of the present invention, 4A is a sectional view showing the operation of the filter assembly of the safety syringe using the anti-magnetic filter assembly of the present invention, FIG. 4A is a view showing the inlet state of the injection solution, FIG. 4B is a cross- Fig.

The safety syringe of the present invention comprises a syringe body 1, a piston 2, and a filter assembly 3, as shown in Fig.

The syringe body 1 has a hollow space therein so as to insert an injection liquid and a piston therein. A plurality of injection liquid discharge protrusions 10 are radially formed at the lower end of the inner space, and a needle holder And a neck portion 11 for engaging with each other is formed in a stepped manner.

As shown in FIG. 2, the plurality of injection-liquid-discharging protrusions 10 may be formed at the lower end of the inner space of the syringe body 1 at six or six or more protrusions along the circumference at regular intervals.

The piston 2 serves to suck or discharge the injected liquid while moving forward or backward in the space of the syringe body 1. The piston 2 is a piston used in a normal syringe. Omit it.

3, the filter assembly 3 is housed in the syringe body 1 to filter foreign substances (such as fragments of a glass ampule or a rubber stopper piece of a vial) mixed in an injection solution, The check valve 31, the microfilter 32 and the check ball 33 so as to prevent the backflow of the check valve 31, the check valve 31,

The housing 30 is made of a synthetic resin material and is formed in a circular shape so as to be inserted into the front of the syringe body 1.

The housing 30 is formed with a hollow hole 300 at a central portion thereof and a plurality of injection liquid outlets 301 are formed around the periphery of the housing 30. The injection liquid outlet 301 is formed at a predetermined interval along the circumference of the housing, Or four or more.

The check valve 31 is made of a silicone material so as to have an elastic force in response to the pressure of the piston 2 of the syringe. The check valve 31 is opened / closed by the pressure of the piston 2 to control the inlet / A cylindrical body 310 inserted into the through hole 300 formed in the cylindrical body 310 and a flange 320 formed at a lower end of the cylindrical body 310 and a cylindrical body 310 formed at a lower central portion of the cylindrical body 310 And an injection liquid inlet 314.

The cylindrical body 310 has an upper opening and a check ball receiving groove 311 formed to have a diameter larger than the diameter of the check ball 33 so as to receive the check ball 33 therein, A cylindrical body 310 is inserted into the through hole 300 of the housing 30 so that the cylindrical body 310 can be tightly coupled with the enlarged protrusion 316.

The flange 320 is moved forward and backward by the pressure of the injection liquid so that the lower end of the injection liquid outlet 301 of the housing 30 is closed when the injection liquid is introduced and the injection liquid outlet 301 is opened The flange 320 is brought into close contact with the lower end of the injection liquid outlet 301 of the housing 30 by the pressure of the piston 2 when the injection liquid is drawn in, The flange 320 is pressed against the injection liquid discharge protrusion 10 of the syringe body by the pressure of the piston and is spaced apart from the lower end of the injection liquid discharge port 301, And is discharged from the discharge port 301 and then discharged through the respective injection liquid discharge protrusions 10.

The diameter of the flange 320 is smaller than the outer diameter of the housing 30 so that a space is formed between the inside of the syringe body 1 and the outside of the flange 320, So that the injected liquid can be discharged through the outer space of the flange 320 and between the injection liquid discharge projections 10 of the syringe body 1.

The injection fluid inlet 314 is formed in a lower central portion of the cylindrical body 310 and has a smaller diameter than the check ball 33 so as to be blocked and opened by the check ball 33.

The microfilter 32 is attached to the upper surface of the housing 30 in a circular shape to filter out foreign substances mixed in the injection liquid. The material is not particularly limited and may be a piece of glass ampoule, It is preferable that the pore size is 5 mu m or less.

The check ball 33 is a round ball shaped rubber or silicone material and is accommodated in the check ball receiving groove 311 of the check valve 31 and is pushed rearward by the pressure of the piston when the injection liquid is drawn in, 314 are opened, and when the injection liquid is discharged, the injection liquid inlet 314 is pushed forward by the pressure of the piston to close the injection liquid inlet 314.

Therefore, the foreign substances introduced into the check ball receiving groove 311 of the check valve 31 are filtered by the micro filter 32 and remain in the check ball receiving groove 311, It is possible to effectively prevent foreign matter from flowing backward while the injection port 314 is closed by the check ball 33 when the injection liquid is discharged.

At this time, the check ball receiving groove 311 formed in the check valve 31 is formed so that the lower surface of the check ball receiving groove 311 can be smoothly moved toward the injection liquid inlet port 314, So that the check ball 33 can easily close the injection liquid inlet 314 when the injection liquid is ejected.

The operation of the safety syringe using the built-in filter assembly according to the present invention will now be described with reference to FIG.

A filter assembly 3 in which the housing 30, the check valve 31, the micro filter 32 and the check ball 33 are coupled and a syringe body 1 in which the piston 2 is inserted are provided with injection needles (Not shown) attached to the syringe body 1, the injector is inserted into the medicine container (such as a glass ampule or a vial), and then the piston 2 is moved backward so that the injection liquid is drawn into the syringe body 1.

4A, the injection liquid that is drawn into the syringe body 1 is pushed by the check generated in the check ball receiving groove 311 of the check valve 31 by the pressure generated by the backward movement of the piston 2, The ball 33 is moved backward and the injection liquid inlet 314 of the check valve 31 is opened so that the injection liquid flows into the check ball receiving groove 311 through the injection liquid inlet 314, So that only the injected liquid filtered by the foreign substance flows into the space of the syringe body 1.

4B, when the piston 2 is advanced after the injection liquid is completely introduced into the syringe body 1 as described above, the check ball 33 is moved forward by the pressure generated by advancing the piston 2, The inlet 314 of the check valve 31 is closed and the foreign substance is prevented from flowing back through the injection fluid inlet 314. The check valve 31 is closed by the pressure generated by the advance of the piston 2, The flange 312 is moved forward from the lower end of the injection liquid outlet 301 of the housing 30 so that the flange 312 is closely attached to the injection liquid discharge projection 10 side of the syringe body 1 and the injection liquid outlet 301 is opened The injected liquid is discharged through the injection liquid outlet 301 and then passed through the outer space of the flange 312 and between the injected liquid ejection protrusions 10 formed in the syringe body 1 to be ejected into the injection needle of the needle holder do.

Although the present invention having been described above has been described with reference to a limited number of embodiments, it is to be understood that the present invention is not limited thereto and that various changes and modifications may be made without departing from the spirit and scope of the present invention by those skilled in the art. Various modifications and variations are possible within the scope of the appended claims.

1-syringe body
10-Injection outlet projection
2-piston
3-filter assembly
30-housing
300-hole
301-Injection outlet
31-Check Valve
310-cylindrical body
311- Check ball housing
312-Flange
314-Injection fluid inlet
32-micro filter
33- Check ball

Claims (5)

A syringe body 1 in which a plurality of injection liquid discharge protrusions 10 are radially formed in a front portion of an inner space formed so as to store an injection liquid therein and a needle holder is fitted in front of the syringe body 1, A piston 2 for sucking or discharging the injected liquid while being moved forward or backward, a filter 2 installed on the plurality of protrusions 10 in the inner space of the syringe body to filter the foreign substances mixed in the injected solution, A housing 30 in which a hollow hole 300 is formed at a central portion thereof and a plurality of injection liquid outlets 301 are formed around the housing 30, and a housing 30 which is coupled to the lower portion of the housing through a through- A check valve 31 for controlling the inflow and outflow of the infusion fluid, a microfluidic pump 30 connected to the upper side of the housing 30 for filtering foreign matters mixed in the infusion fluid, And a check ball 33 which is housed inside the check valve 31 and which is moved back and forth by the pressure of the piston to control the injection and discharge of the injection liquid Respectively,
The check valve 31 is inserted into the through hole 300 of the housing and is made of elastic silicone material. The check ball receiving groove 311 having a diameter larger than the diameter of the check ball is accommodated in the upper open- A cylindrical body 310 formed at a lower portion of the cylindrical body 310 and closing the lower end of the injection liquid outlet 301 of the housing when the injection liquid flows therein and opening the injection liquid outlet 301 at the time of injecting liquid, A flange 312 for allowing the injection liquid discharged from the discharge port 301 to be discharged through the injection liquid discharge protrusions 10 of the syringe body 1 and a flange 312 formed at the lower central portion of the cylindrical body, And an injection liquid inlet port 314 in which the inflow and outflow of the infusion liquid is controlled,
The flange 312 is formed to have a smaller diameter than the outer diameter of the housing 30 so that the injection liquid discharged from each injection liquid outlet 301 can be moved to the outside of the flange 312 when the injection liquid is discharged A safety syringe using an internal filter assembly. delete delete delete delete

Images