KR20230001195A - Safety syringe with filter assembly - Google Patents

Abstract

The present invention relates to a safety syringe with a filter assembly. According to the present invention, the safety syringe with a filter assembly comprises: a needle holder including an injection needle and a hub body supporting an end part of the injection needle; a syringe main body; and a plunger, and further comprises an opening/closing unit provided in a state of elastic support on the inner inclined surface of the hub body to allow an injection liquid to move through a gap formed with the inclined surface of the hub body while an opening/closing of the inside is closed when the injection liquid is sucked and allow the opening/closing hole to be opened by water pressure while coming in close contact with the inner peripheral surface of the hub body by elastic force when the injection liquid is discharged; and a filter unit provided at an end part of the opening/closing hole to filter out foreign substances contained in the injection liquid. Accordingly, the injection liquid containing fine glass powder moves through the inside of the hub body and the formed gap while the opening/closing hole inside the opening/closing unit is closed by a descending ball member when the injection liquid is sucked from a glass ampoule, and the opening/closing hole is open as the ball members rising by water pressure are spaced apart while the gap between the opening/closing unit and the inside of the hub body is removed by the elastic force of a tension member when the injection liquid is discharged such that the injection liquid is discharged after the filter unit filters out the fine glass powder remaining in the injection liquid, thereby providing effects of preventing the fine glass powder from entering a human body and of being used without replacing the injection needle when the injection liquid is injected into the human body to be economical.

Description

Safety syringe with filter assembly {SAFETY SYRINGE WITH FILTER ASSEMBLY}

The present invention relates to a safety syringe having a filter assembly, and more particularly, to a safety syringe having a filter unit inside a hub body to filter fine glass powder remaining in an injection solution.

In general, a medical syringe is used to collect blood from a patient's blood vessel or to collect other body fluids other than blood from the body.

Here, the medical syringe cuts the upper end of the glass ampoule and picks up the injection needle through the cut part to move the injection solution contained in the glass ampoule or inside the small glass bottle with a rubber stopper into the syringe when injecting the injection solution into the body. You will inhale the drug to be injected.

A technology related to such a medical syringe has been proposed in Korean Patent Publication No. 2005-0108169.

However, Patent Document 1 has a problem in that it is inconvenient to use and uneconomical because the syringe hub or the filter means inside the hub are replaced every time the injection solution is sucked and discharged from the glass ampoule.

Korean Patent Publication No. 2005-0108169 (2005.11.16)

The present invention has been made to solve the above problems, and it is possible to prevent the fine glass powder remaining in the injection solution inside the glass bottle from entering the human body when the mouth of the glass bottle is cut, and can be used without replacing the needle when injecting the human body. Its purpose is to provide an all-in-one disposable safety syringe.

A safety syringe having a filter assembly according to the present invention for achieving the above object is a syringe composed of an injection needle, a needle holder composed of a hub body supporting an end of the injection needle, a syringe body and a plunger, wherein the It is provided in a state of being elastically supported on the inner inclined surface of the hub body, so that the injection liquid moves through the gap formed with the inclined surface of the hub body while the opening and closing hole inside is closed when the injection liquid is sucked in, and the inner circumferential surface of the hub body by the elastic force when the injection liquid is discharged. An opening/closing unit in which the opening/closing hole is opened by water pressure while in close contact with the opening/closing unit; and a filter unit provided at an end of the opening/closing hole to filter foreign substances included in the injection liquid.

The opening/closing part may include a body in which an opening/closing inclined surface is formed on an outer circumferential surface to correspond to an inclined surface of the hub body, and a moving hole is formed to an end while communicating with the opening/closing hole; a tension member provided at an end of the body to provide elastic force to the body; and a sphere member positioned inside the moving hole to open and close the opening and closing hole.

The tension member may be a tension bar integrally radially formed on a bottom surface of the body or an end portion of the syringe body and supported in a deformed state by a deformable jaw formed on an inner circumferential surface of the hub body.

The tension member may be a spring provided on a bottom surface of the body or an end portion of the syringe body.

A separation preventing member may be further included at an end of the moving hole to prevent separation of the sphere member.

The separation preventing member may be provided separately and coupled to the moving hole, integrally formed on a surface opposite to the moving hole, or formed in a through hole of the hub body.

According to the present invention, when the injection solution is sucked from the glass ampoule, the opening and closing hole inside the opening and closing part is closed by the descending sphere member, and the injection solution containing the fine glass powder moves through the gap formed with the inside of the hub body, and the injection solution is discharged. In this case, the elastic force of the tension member eliminates the gap between the opening and closing part with the inside of the hub body, and the opening and closing hole is opened by the separation of the sphere member rising by the water pressure, so that the fine glass powder remaining in the injection liquid is filtered by the filter part and then the injection liquid is discharged. Thus, it prevents the inflow of fine glass powder into the human body, and at the same time, it can be used without replacing the injection needle when injecting the human body, which has an economical effect.

1 is a front view showing a state in which an injection solution is sucked by a safety syringe equipped with a filter assembly of the present invention.
Figure 2 is a front view showing a state in which an injection solution is injected by a safety syringe equipped with a filter assembly of the present invention.
3 is a front view and a bottom view showing an opening and closing part and a filter part in a safety syringe having a filter assembly of the present invention.
Figure 4 is a plan view and an installation view showing a release prevention member in the safety syringe having a filter assembly of the present invention for each embodiment.
5 is an exploded cross-sectional view showing a state formed in the syringe body when the tension member is a tension bar in the safety syringe having the filter assembly of the present invention.
6 is a side view showing a state in which the tension member is coupled to the lower portion of the opening/closing unit in the case of a spring in the safety syringe having the filter assembly of the present invention.
7 is an exploded cross-sectional view showing a state formed in the syringe body when the tension member is a spring in the safety syringe having the filter assembly of the present invention.

The above objects, features and other advantages of the present invention will become more apparent by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings. Hereinafter, a safety syringe having a filter assembly according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing a state of inhaling an injection solution by a safety syringe having a filter assembly of the present invention, and FIG. 2 is a front view showing a state of injecting an injection solution by a safety syringe having a filter assembly of the present invention 3 is a front view and a bottom view showing an opening and closing part and a filter in a safety syringe having a filter assembly of the present invention, and FIG. 4 is a separation prevention member in a safety syringe having a filter assembly of the present invention according to embodiments Figure 5 is an exploded cross-sectional view showing a state formed in the syringe body when the tension member is a tension bar in the safety syringe having the filter assembly of the present invention, Figure 6 is a filter assembly of the present invention In one safety syringe, when the tension member is a spring, it is a side view showing a state coupled to the lower part of the opening and closing part, and FIG. 7 is a safety syringe having a filter assembly of the present invention, when the tension member is a spring, it shows a state formed on the syringe body It is an exploded cross-section.

1 to 7 , a safety syringe 10 with a filter assembly of the present invention includes a needle holder 100 , a syringe body 200 and a plunger 300 .

The needle holder 100 is composed of an injection needle 110 from which an injection solution is discharged, and a hub body 120 fixed to the coupling portion 202 of the syringe body 200 while supporting the end of the injection needle 110.

In the hub body 120, a coupling hole 122 is formed at one end coupled to the coupling portion 202 of the syringe body 200, and a through hole 124 is coupled to the other end of the interior to which the needle 110 is coupled. It is formed to have a smaller inner diameter than the hole 122 . At this time, the hub body 120 is made of a synthetic resin material such as translucent.

In addition, a deformable jaw 126 protrudes along the inner circumferential surface so that the end of the tension member 134 of the opening and closing part 130 is coupled to the end of the through hole 124 in a deformed state while being caught.

In addition, between the coupling hole 122 and the through hole 124, the inclined surface 128 for blocking or passing the injection liquid while the opening and closing inclined surface 133 of the opening and closing part 130 is in close contact or spaced apart from the deformable jaw 126 and the through hole It is formed along between (124).

On the other hand, the inclined surface 128 is formed in a form in which the diameter gradually decreases from the coupling hole 122 to the through hole 124.

Further, the hub body 120 includes an opening/closing portion 130 that opens and closes while moving in both directions in a state located inside the hub body 120 .

Here, the opening and closing part 130 includes a body 132, a tension member 134, a sphere member 136 and a separation preventing member 138.

The body 132 is formed in the shape of a truncated cone, an opening and closing inclined surface 133 is formed on the outer circumferential surface, a moving hole 132a is formed through the inner upper side, and a small diameter opening and closing hole ( 132b) is formed through.

At this time, the injection liquid moves through the gap formed when the opening and closing inclined surface 133 is separated from the inclined surface 128 of the hub body 120 when the injection liquid is sucked, and when the injection liquid is discharged, the injection liquid is adhered to the inclined surface 128 by the elastic force to eliminate the gap. prevent it from moving.

The tension member 134 is provided at an end of the body 132 and provides elastic force to the body 132 while the end is caught on the deformable shoulder 126 of the hub body 120 .

At this time, the tension member 134 is integrally formed on the bottom surface of the body 132 or provided separately.

That is, when the tension member 134 is integrally formed on the bottom surface of the body 132, the tension bar is integrally formed radially on the bottom surface of the body 132 and supported in a deformed state on the deformable jaw 126. (See Fig. 4). At this time, the tension bar is illustrated as being provided in a straight line, but the shape may be deformed without being limited thereto.

Here, when the tension member 134 is a tension bar, it is difficult to manufacture it in a bent state on the bottom surface of the body 132, so it is manufactured in a straight state and then artificially bent so that the end is caught on the deformable jaw 126.

Alternatively, when the tension member 134 is provided separately on the bottom of the body 132, it is a spring positioned between the body 132 and the deformable jaw 126 while being fixed to the bottom of the body 132 (see FIG. 6 ).

On the other hand, when the tension member 134 is a tension bar, it can be integrally formed on the upper surface of the coupling part 202 of the syringe body 200 (see FIG. 5). At this time, the lower end of the tension bar is connected along the edge of the upper surface of the coupling part 202 and the upper end is positioned on the lower surface of the body 132 in a deformed state.

In addition, when the tension member 134 is a spring, it can be fixed to the upper surface of the coupling part 202 of the syringe body 200 (see FIG. 7).

The sphere member 136 is located in the moving hole 132a of the body 132 and opens and closes the opening and closing hole 132b while moving, and a steel ball made of SUS is applied thereto.

That is, the sphere member 136 closes the opening/closing hole 132b while moving by water pressure when the injection solution is sucked in, and opens the opening/closing hole 132b while moving by water pressure when the injection solution is discharged.

The separation preventing member 138 is provided at the end of the moving hole 132a to prevent the separation of the sphere member 136.

At this time, the separation preventing member 138 is provided separately and is formed in an annular shape to be coupled to the moving hole 132a and has a protrusion opposite to the inner circumferential surface [see FIGS. 4 (a) and 6 (a)], or a moving ball ( 132a) is provided in the form of a protrusion integrally formed in a downwardly inclined state (see FIGS. 4(b) and 6(b)) on the opposite surface of the hub body 120, or one around the through hole 124 of the hub body 120. Alternatively, a plurality of them are integrally protruded radially (see FIG. 4(c)).

It further includes a filter unit 140 fixed to the lower surface of the body 132 of the opening and closing unit 130 where the tension member 134 is located by ultrasonic welding and filtering the fine glass powder remaining in the injection solution.

The filter unit 140 is a filter assembly through which fine glass powder is introduced into the glass ampoule in the process of cutting the inlet of the glass ampoule, and filters the fine glass powder included in the liquid when the injection liquid is discharged.

At this time, the filter unit 140 is installed on the tension member 134 side of the body 132 of the opening and closing unit 130, and preferably has an outer diameter smaller than that of the body 132.

In addition, since the injection solution does not pass through the filter unit 140 when the injection solution is introduced, contamination of the filter surface is prevented.

As shown in FIGS. 1, 2, 5 and 7, the syringe body 200 has a coupling portion 202 protruding so that the hub body 120 of the needle holder 100 is coupled to one end, and the other The end is formed with an opening to accommodate the injection solution.

On the other hand, the syringe body 200 has no difference in resistance when injecting into the human body as long as the flow passage effective area is larger than the inner diameter cross-sectional area of the injection needle 110.

In addition, the syringe body 200 is made of a transparent material such as synthetic resin or glass.

As shown in FIGS. 1, 2, 5 and 7, the plunger 300 is inserted into the syringe body 200 so as to be able to move forward and backward in the axial direction.

That is, the plunger 300 is provided with a piston on the front surface so that the outer circumferential surface of the piston and the inner circumferential surface of the syringe body 200 are always in elastic contact even when axially moved within the syringe body 200 to maintain airtightness.

The operation process of the safety syringe 10 equipped with the filter assembly of the present invention will be described as follows.

First, in order to suck the injection solution into the safety syringe 10, the injection needle 110 is inserted into the inlet of the glass ampoule in a state where the inlet is cut, and when the plunger 300 is retracted, the injection solution accommodated in the glass ampoule is transferred to the injection needle. It is sucked through (110).

Next, the injection liquid sucked through the injection needle 110 flows through the passage hole 124, and the opening and closing hole 132b is closed by moving the sphere member 136 by the hydraulic pressure of the injection liquid, thereby closing the opening and closing portion ( 130) Retract the body 132. At this time, the tension member 134 is maintained in a pressurized state by the water pressure of the injection solution.

Next, by retracting the body 132 of the opening and closing part 130, the opening and closing inclined surface 133 is spaced apart from the inclined surface 128 of the hub body 120, and the injection liquid moves through the gap and is coupled to the coupling hole 122. is introduced into the syringe body 200 through the discharge hole 204 formed inside the coupling part 202 of the syringe body 200. At this time, the injection solution containing the fine glass powder is accommodated in the syringe body 200 .

Next, when the plunger 300 is advanced to inject the injection solution into the patient, the inside of the syringe body 200 is compressed while the fine glass powder is filtered through the filter unit 140. The tension member deformed by the hydraulic pressure of the injection solution ( 134) is placed in its original position, and the opening/closing inclined surface 133 of the body 132 of the opening/closing part 130 comes into close contact with the inclined surface 128 of the hub body 120.

Next, as the opening/closing inclined surface 133 adheres to the inclined surface 128 so that there is no gap, the injection liquid filtered through the fine glass powder moves to the opening/closing hole 132b and removes the old member 136 blocking the opening/closing hole 132b. The opening/closing hole 132b is opened and closed by pushing.

Next, while the sphere member 136 is spaced apart from the opening/closing hole 132b, the injection solution passes through the passage hole 124 and is injected into the skin through the injection needle 110.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. you will be able to understand Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

10: safety syringe with filter assembly
100: needle holder 110: injection needle
120: hub body 122: coupling hole
124: through hole 126: deformable jaw
128: inclined surface 130: opening and closing part
132: body 133: opening and closing slope
134: tension member 136: bending member
138: departure prevention member 140: filter unit
200: syringe body 202: coupling part
300: plunger

Claims (6)

A syringe composed of an injection needle, a needle holder composed of a hub body supporting an end of the injection needle, a syringe body, and a plunger,
It is provided in a state of being elastically supported on the inner inclined surface of the hub body, so that the injection liquid moves through the gap formed with the inclined surface of the hub body while the opening/closing hole inside is closed when the injection liquid is sucked in, and the elastic force when the injection liquid is discharged moves the hub body. an opening/closing unit in which the opening/closing hole is opened by water pressure while in close contact with an inner circumferential surface; and
A safety syringe having a filter assembly comprising a; filter unit provided at an end of the opening/closing hole to filter foreign substances included in the injection solution. The method of claim 1, wherein the opening and closing portion,
a body in which an opening/closing inclined surface is formed on an outer circumferential surface corresponding to an inclined surface of the hub body, and a moving hole is formed up to an end thereof while communicating with the opening/closing hole;
a tension member provided at an end of the body to provide elastic force to the body; and
A safety syringe with a filter assembly comprising a; sphere member positioned inside the moving hole to open and close the opening and closing hole. According to claim 2,
The tension member is a tension bar integrally radially formed on the bottom surface of the body or the end of the syringe body and supported in a deformed state on the deformable jaw formed on the inner circumferential surface of the hub body Provided with a filter assembly, characterized in that one safety syringe. According to claim 2,
The safety syringe having a filter assembly, characterized in that the tension member is a spring provided on the bottom surface of the body or the end of the syringe body. According to claim 2,
A safety syringe having a filter assembly, characterized in that it further comprises a separation preventing member to prevent the separation of the sphere member at the end of the moving hole. According to claim 5,
The safety syringe having a filter assembly, characterized in that the separation prevention member is provided separately and coupled to the moving hole, integrally formed on the opposite surface of the moving hole, or formed in the through hole of the hub body.

Images