HK40000278A - Filter syringe - Google Patents

Description

Filter syringe

Technical Field

The present invention relates to a filtering syringe, and more particularly, to a device for softly sucking a medical solution with less force by improving a syringe having a filtering mechanism for filtering foreign materials such as glass fragments of an ampoule, which controls the opening and closing of a check valve mechanism according to whether a cap is separated or not, and which can filter and suck the medical solution through the filtering mechanism having a wide cross-sectional area even with less force in a state where the cap is assembled, and which can inject the medical solution by automatically closing the check valve mechanism in a state where the cap is separated, thereby maximizing convenience of a user and merchantability of the syringe.

Background

Generally, a syringe is a device for injecting a drug solution into the body of an animal or plant, and is made to be capable of injecting a drug solution into an arbitrary tissue by penetrating the skin with a sharp end.

Fig. 1 is an exploded perspective view illustrating a general syringe, and generally, as illustrated in fig. 1, the syringe is composed of a cylinder 20 to which an injection needle 10 is coupled and which contains a medical fluid, and a plunger 30 which is provided in the cylinder 20 so as to be capable of advancing and retreating.

In such a general syringe, the negative pressure is generated in the cylinder 20 as the plunger 30 moves backward, the liquid medicine is filled, and the liquid medicine in the cylinder 20 is discharged through the injection needle 10 by the positive pressure as the plunger moves forward, and the liquid medicine is injected into the body of the patient.

However, in the use of such a general syringe, foreign matter originally mixed in the drug solution itself or foreign matter such as glass particles which are scattered and mixed in the drug solution in the process of opening the ampoule storing the drug solution by breaking is likely to be injected into the body of the patient together with the drug solution.

In order to solve such a problem, a filtering syringe having a filter for filtering foreign substances included in a medical solution has been developed.

First, as disclosed in korean laid-open patent publication No. 2012-87587, a conventional filter syringe in which a filter for filtering foreign matter is provided in an injection needle or a cylinder has a function of filtering foreign matter from a medical fluid sucked into the cylinder.

However, since foreign matter adheres to the outer surface of the injection needle that enters the ampoule when the medical fluid is inhaled, or the medical fluid remaining in the injection needle is in a state in which the foreign matter is not filtered, it is impossible to fundamentally prevent the foreign matter from being injected into the body of the patient together with the medical fluid.

In response to this, U.S. patent publication No. 4180071 discloses an example in which a filter for filtering foreign matter is provided inside a cap that covers an injection needle.

Fig. 2 is an exploded perspective view illustrating a conventional filter cap syringe, fig. 3 is a sectional view illustrating a main portion of the conventional filter cap syringe, and fig. 2 and 3 illustrate an example of the conventional filter cap syringe disclosed in U.S. patent publication No. 4180071.

As shown in fig. 3, the conventional filter-capped syringe includes a filter 41 inside a cap 40, and when a medical fluid is sucked, foreign substances are filtered by the filter 41, and when an injection is performed, the cap 40 including the filter 41 is separated from the injection needle 10, so that there is no fear that foreign substances are injected together with the medical fluid.

However, in the conventional filter cap syringe, not only the diameter of the filter cap is smaller than the diameter of the inlet of the vial, but also when the diameter of the filter cap is large, it is difficult to form a sharp end having high rigidity, and therefore, there is a limit in widening the area of the filter mechanism.

Meanwhile, since the medical solution is sucked into the cylinder 30 only through the fine injection needle 10 after passing through the filter 41 of the cap 40, a large force is required to suck the medical solution, which is inconvenient in use.

Disclosure of Invention

Technical problem

To solve the above problems, the present invention is directed to provide a filtering syringe which can filter and suck a medical fluid through a filtering mechanism having a wide cross-sectional area even with less force in a state where a cap is assembled, and inject the medical fluid by self-closing of a check valve mechanism in a state where the cap is separated, thereby enabling user convenience and commercialization of the syringe to be maximized.

Technical scheme

The present invention as described above is achieved by a filtering syringe including an injection needle including a needle body and a needle holder, and a cylinder to which the injection needle is coupled, wherein the needle holder is formed with an annular space having an inner wall surface, an outer wall surface, and a bottom surface, the bottom surface is formed with a through hole communicating with the cylinder, an elastic one-way opening/closing mechanism having a cylindrical portion and a wing portion is provided on the inner wall surface, a tip end of the wing portion is elastically contacted with the outer wall surface, a filtering mechanism is provided in the annular space between the one-way opening/closing mechanism and the through hole, the filtering syringe further includes a cap which is formed of a hollow body having a pointed end and is bonded to an outer peripheral surface of the needle holder so as to maintain airtight, and an opening/closing mechanism which wraps the needle body is provided inside.

In this case, it is preferable that the one-way opening/closing mechanism is formed with a projection corresponding to an inner peripheral surface of the cap to deform the wing.

Conversely, the wing portion may be deformed by forming a protrusion corresponding to the one-way opening/closing mechanism on the inner peripheral surface of the cap.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention as described above is an invention in which a medical solution can be filtered and sucked through a filter mechanism having a wide cross-sectional area with less force in a state where a cap is assembled, and the medical solution can be injected by automatically closing a check valve mechanism in a state where the cap is separated, thereby maximizing convenience of a user and merchantability of a syringe.

Drawings

Fig. 1 is an exploded perspective view illustrating a general syringe.

Fig. 2 is an exploded perspective view illustrating a conventional filter cap syringe.

Fig. 3 is a sectional view of a main part of a conventional filter cap syringe.

Fig. 4 is a perspective view illustrating the filtering syringe of the present invention.

Fig. 5 is an exploded perspective view with the cap separated in the filtered injection of the present invention.

Fig. 6 is an exploded perspective view of the filter syringe of the present invention with the one-way valve mechanism and the filter mechanism separated.

Fig. 7 is a cross-sectional view illustrating the filtering syringe of the present invention.

Fig. 8 is a sectional view illustrating the filtering syringe according to the present invention when a medical fluid is inhaled.

Fig. 9 is a sectional view illustrating injection of a medical fluid in the filtering syringe according to the present invention.

Fig. 10 is a sectional view showing another example of the check valve mechanism in the filtering syringe according to the present invention.

Fig. 11 is a sectional view showing another example of the cap of the filtering syringe according to the present invention.

Description of the symbols

10: injection needle, 11: a needle body, 12: needle holder, 12 a: inner wall surface, 12 b: outer wall surface, 12 c: bottom surface, 12 d: annular space, 12 e: through hole, 13: adhesive material, 20: cylinder, 30: plunger, 100: cap, 110: suction needle, 120: cap, 123: projection, 200: filter mechanism, 300: one-way valve mechanism, 301: projection, 360: cylindrical portion, 370: wing part, 400: opening and closing mechanism, 410: airtight space, 420: a flange.

Detailed Description

Fig. 4 is a perspective view illustrating the filtering syringe of the present invention, fig. 5 is an exploded perspective view in which a cap is separated in the filtering injection of the present invention, and fig. 6 is an exploded perspective view in which a check valve mechanism and a filtering mechanism are separated in the filtering syringe of the present invention.

Fig. 7 is a sectional view illustrating the filtering syringe according to the present invention, fig. 8 is a sectional view illustrating a case where a medical fluid is sucked into the filtering syringe according to the present invention, and fig. 9 is a sectional view illustrating a case where a medical fluid is injected into the filtering syringe according to the present invention.

Fig. 10 is a sectional view showing another example of the check valve mechanism in the filtering syringe according to the present invention, and fig. 11 is a sectional view showing another example of the cap in the filtering syringe according to the present invention.

The specific configurations and functional descriptions of the embodiments of the present invention are merely exemplary for the purpose of describing the embodiments related to the concept of the present invention, and the embodiments related to the concept of the present invention can be implemented in various forms. Further, it should be understood that the present invention is not limited to the embodiments described in the specification, but includes all modifications, equivalents, and alternatives included in the spirit and technical scope of the present invention.

On the other hand, in the present invention, the terms first and/or second, etc. may be used to describe various constituent elements, but these constituent elements should not be limited to these terms. These terms are used only for the purpose of distinguishing one constituent element from another constituent element, and for example, a first constituent element may be named as a second constituent element, and similarly, a second constituent element may also be named as a first constituent element, without departing from the scope of the claims relating to the concept of the present invention.

When a component is referred to as being "connected" or "connected" to another component, it is to be understood that the component may be directly connected or connected to the other component, but another component may exist therebetween. Conversely, when a component is referred to as being "directly connected" or "directly contacting" another component, it is to be understood that no other component exists therebetween. Other expressions for explaining the relationship between the constituent elements, that is, expressions such as "between … …", "just between … …", or "adjacent to … …", "directly adjacent to … …", and the like, should be interpreted as such.

The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless the context clearly dictates otherwise, singular expressions include plural expressions. In the present specification, terms such as "comprising" or "having" should be interpreted as specifying the presence of the stated features, integers, steps, actions, elements, components, or groups thereof, as implemented, but not preclude the presence or addition of one or more other features, integers, steps, actions, elements, components, or groups thereof.

As shown in fig. 4 to 11, the present invention relates to a filtering syringe which is improved with a filtering mechanism for filtering foreign materials such as glass fragments of an ampoule, controls the opening and closing of a check valve mechanism 300 according to whether a cap 100 is separated, and on the other hand, can design a cross-sectional area of the filtering mechanism 200 to be wide, and thus can gently suck a medical fluid with less force, whereby the medical fluid can be filtered and sucked through the filtering mechanism 200 having a wide cross-sectional area even with less force in a state where the cap 100 is assembled, and the check valve mechanism 300 is automatically closed to inject the medical fluid in a state where the cap 100 is separated, thereby maximizing convenience of a user and merchantability of the syringe.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As illustrated in fig. 4 to 7, it is preferable that the filtering syringe of the present invention includes a syringe 10 consisting of a needle body 11 and a needle holder 12 and a cylinder 20 to which the syringe 10 is coupled, an annular space 12d having an inner wall surface 12a, an outer wall surface 12b and a bottom surface 12c is formed in the hub 12, a through hole 12e communicating with the cylinder 20 is formed in the bottom surface 12c, an elastic one-way opening/closing mechanism 300 having a cylindrical portion 360 and a wing portion 370 is provided on the inner wall surface 12a, and the tip of the wing portion 370 is elastically contacted with the outer wall surface 12b, a filter mechanism 200 is provided in an annular space 12d between the one-way opening and closing mechanism 300 and the through hole 12e, the filter syringe further has a cap 100, the cap 100 is formed of a hollow body having a sharp end, is coupled to the outer circumferential surface of the needle holder 12 in a gas-tight manner, and is provided with an opening/closing mechanism 400 for wrapping the needle body 11 therein.

In the conventional syringe, an intake flow path of the drug solution for sucking the drug solution into the cylinder 20 is the same as an injection flow path of the drug solution for injecting the drug solution into the injection needle 10.

However, by improving the known syringe including the injection needle 10, the cylinder 20, and the plunger, the filtering syringe of the present invention is provided with an intake flow path from the chemical solution container to the cylinder 20 and an injection flow path from the cylinder 20 to the injection needle 10, and the intake flow path is provided with the filter mechanism 200 and the check valve mechanism 300, and the injection flow path is provided with the detachable opening and closing mechanism 400, and the flow path from the chemical solution container to the filter mechanism 200 is formed separately from the outer peripheral surface of the injection needle 10 and the injection flow path.

In this way, in the inhalation flow path, the flow path from the chemical solution container to the filter mechanism 200 is a section in which the chemical solution containing foreign matter such as glass fragments may remain when the chemical solution container such as a glass ampoule is unsealed, and thus, by forming the section in which foreign matter may remain separately from the injection flow path and the outer peripheral surface of the injection needle 10, it is possible to fundamentally prevent foreign matter such as glass fragments from being injected into the body.

That is, in the present invention, when the medical fluid is sucked, as shown in fig. 8, the check valve mechanism 300 of the suction flow channel is opened so that the medical fluid, in which foreign substances are filtered by the filter mechanism 200, is sucked into the cylinder 20 of the syringe, and during this time, the injection flow channel is closed by the opening and closing mechanism 400.

Conversely, when injecting the medical solution, as shown in fig. 9, the suction flow path is closed by the check valve mechanism 300, and the injection flow path is opened with the removal of the opening and closing mechanism 400.

At this time, according to the embodiment, the check valve mechanism 300 may be automatically adjusted to be opened or closed according to the direction of action of the pressure formed by the interaction of the cylinder 20 and the plunger 30, or may be adjusted to be opened or closed only according to whether the cap 100 is separated or not.

In the present invention, as shown in fig. 7, an annular space 12d having an inner wall surface 12a, an outer wall surface 12b, and a bottom surface 12c is formed in a hub 12 constituting a part of an injection needle 10.

The annular space 12d is a space formed by rotating the substantially U-shaped cross section 360 degrees around the needle body 11, and covers the outer circumferential surface of the needle body 11 corresponding to the inner wall surface 12a, the inner circumferential surface of the hub 12 constituting the outer wall surface 12b, and the horizontal surface connecting the inner wall surface 12a and the outer wall surface 12b constituting the bottom surface 12 c.

At this time, a through hole 12e is formed in the bottom surface 12c, and the chemical liquid passing through the through hole 12e can be delivered to the cylinder 20.

In particular, the one-way opening and closing means 300 and the filtering means 200 will be located in such said annular space 12 d.

The one-way opening/closing mechanism 300 is automatically opened and closed in accordance with the direction of action of the pressure acting on the cylinder 20, is made of a soft elastic material such as silicon, and includes a cylindrical portion 360 and a wing portion 370, as shown in fig. 6 and 7.

Here, the cylindrical portion 360 is a structure for fixing the one-way opening/closing mechanism 300, and is coupled to wrap the hub 12 of the injection needle 10, and in this case, it is preferable to provide a boss on the hub 12 so as not to separate the one-way opening/closing mechanism 300.

In addition, the lower inclined tip of the wing 370 elastically contacts the outer wall surface 12 b.

As a result, when the medical solution is inhaled, the edge of the wing 370 is deformed downward as shown in fig. 8 to open the one-way opening/closing mechanism 300, and when the medical solution is injected, the edge of the wing 370 contacts the outer wall surface 12b of the annular space 12d as shown in fig. 9 to close the one-way opening/closing mechanism 300.

Further, a known filter mechanism 200 capable of filtering foreign matter such as fine glass fragments is provided in the annular space 12d between the one-way opening/closing mechanism 300 and the through hole 12 e.

Therefore, the chemical liquid that has passed through the one-way opening/closing mechanism 300 when the chemical liquid is sucked is filtered of foreign matter by the filter mechanism 200, and then flows into the cylinder through the through hole 12e of the annular space 12 d.

In this case, the cap 100 is used for sucking a drug solution from a drug solution container, and includes a suction needle 110 and a cap holder 120, and the suction needle 110 has a high rigidity because its tip is formed in an inclined shape so as to be inserted into a vial or the like and is made of a metal material or a synthetic resin material.

The cap 120 is integrally coupled to support the suction needle 110, and an inner circumferential surface of the cap 120 is coupled to an outer circumferential surface of the hub 12 supporting the needle body 11 of the injection needle 10 to maintain airtightness.

At this time, as shown in fig. 5 and 7, an opening and closing mechanism 400 wrapping the needle body 11 is provided inside the cap 100.

The opening/closing mechanism 400 basically functions to open and close the needle body 11, and prevents contamination of the contaminated medical fluid on the outside of the needle body 11.

That is, although the needle body 11 of the injection needle 10 is closed by the opening and closing mechanism 400 when the medical fluid is inhaled, the opening and closing mechanism 400 is separated to open the needle body 11 when the medical fluid is injected.

In particular, in the present invention, as illustrated in fig. 5, the opening and closing mechanism 400 may be configured to include an airtight space 410 and a flange 420.

Thereby, the opening and closing mechanism 400 may be fixed to the inner circumferential surface of the cap holder 120 of the cap 100 by the flange 420, so that the opening and closing mechanism 400 can be integrally separated from the cap 100.

In particular, in the present invention, it is preferable that the adhesive material 13 for fixing the needle body 11 and the hub 12 of the injection needle 10 to each other is accommodated in the airtight space 410 of the opening and closing mechanism 400 for covering the injection needle 10 to maintain airtightness, and is isolated from the medical solution.

This prevents the adhesive 13 from coming into contact with the chemical solution to reduce the adhesive strength of the adhesive 13 or prevent the chemical solution from being modified by the adhesive 13.

According to this structure, the liquid medicine suction flow path is formed by the space between the cap 100 and the opening/closing mechanism 400 → the one-way opening/closing mechanism 300 → the filter mechanism 200 → the through hole 12e → the cylinder 20, and the liquid medicine injection flow path is formed by the cylinder 20 → the injection needle 10.

In the filtering syringe of the present invention, the opening and closing of the one-way opening and closing mechanism 300 depends on the direction of the pressure applied to the cylinder 20, and when the negative pressure is applied to the cylinder 20, as shown in fig. 8, the wing 370 of the one-way opening and closing mechanism 300 is spaced from the outer wall surface 12b, so that the medical fluid flowing between the cap 100 and the opening and closing mechanism 400 flows into the cylinder 20 through the through hole 12e via the opened one-way opening and closing mechanism 300 and the filter mechanism 200.

On the contrary, when a positive pressure is applied to the cylinder 20 in a state where the cap 100 and the opening/closing mechanism 400 are separated, as shown in fig. 9, the wing portions 370 of the one-way opening/closing mechanism 300 come into contact with the outer wall surface 12b, and the medical fluid in the cylinder 20 cannot pass through the closed one-way opening/closing mechanism 300 but is injected through the injection needle 10.

Although the above description has been made by taking as an example the case where the one-way opening/closing mechanism 300 is opened and closed only in the direction of the pressure acting in the cylinder 20, incidentally, there may be a structure that assists the opening of the one-way opening/closing mechanism 300 depending on whether the cap 100 is assembled or not.

In contrast, as shown in fig. 10, it is preferable that the one-way opening/closing mechanism 300 is formed with a protrusion 301 corresponding to the inner circumferential surface of the cap 100 to deform the wing 370.

That is, a protrusion 301 is formed to protrude at an upper portion of the one-way opening and closing mechanism 300, and such a protrusion 301 is designed to have a height to be in contact with an inner circumferential surface of the cap 100 when the cap 100 is assembled. As the cap 100 is assembled, the inner circumferential surface of the cap 100 is brought into contact with the protrusion 301, thereby deforming the wing 370 of the one-way opening and closing mechanism 300 to induce the opening of the one-way opening and closing mechanism 300.

In this case, the flow path is formed at the protrusion 301 at a predetermined interval so as not to block the flow of the chemical solution.

Of course, the protrusion 301 may be directly formed to extend from the wing 370.

On the contrary, as shown in fig. 11, the wing 370 may be deformed by forming a protrusion 123 corresponding to the one-way opening/closing mechanism 300 on the inner circumferential surface of the cap 100.

In this case, a protrusion 123 is formed on the inner circumferential surface of the cap 100, and such a protrusion 123 preferably has a height and a position to the extent of contacting the one-way opening and closing mechanism 300 when the cap 100 is assembled.

Accordingly, the cylindrical portion 360 of the one-way opening/closing mechanism 300 is forced downward, which induces the wing portions 370 to deform in the lower direction, thereby opening the one-way opening/closing mechanism 300.

At this time, similarly, flow paths are formed at predetermined intervals in the projections 123 so as not to block the flow of the chemical solution.

It is needless to say that the protrusion 123 may be extended so as to directly contact the wing 370, and the wing 370 may be forcibly spaced from the outer wall surface 12b by the protrusion 123.

Therefore, in the filtering syringe of the present invention, the inlet of the suction flow path and the outlet of the injection flow path are completely separated from each other, so that it is possible to fundamentally prevent foreign substances such as glass fragments from being sucked together with the medical fluid, the one-way opening/closing mechanism 300 can be automatically opened and closed basically according to the direction of the pressure acting on the cylinder 20, and the one-way opening/closing mechanism 300 can be more smoothly opened and closed by forming the additional protrusion 301 or the protrusion 123.

At the same time, there is a remarkable advantage in that the sectional area of the filter mechanism 200 can be widened to a desired area, and thus even if the filter mechanism 200 for filtering extremely fine foreign substances is applied, a user can easily inhale and inject the medical solution with a small force.

In particular, only by inhaling the medical solution and separating the cap 100 in a state where the cap 100 is assembledCan inject the liquid medicine, thereby having the advantage of greatly improving the convenience of users。

The above embodiments are examples for specifically explaining the technical idea of the present invention, and the scope of the present invention is not limited to the above drawings or embodiments.

Industrial applicability of the invention

The present invention as described above is an invention in which a medical solution can be filtered and sucked through a filter mechanism having a wide cross-sectional area with less force in a state where a cap is assembled, and the medical solution can be injected by automatically closing a check valve mechanism in a state where the cap is separated, thereby maximizing convenience of a user and merchantability of a syringe.

Claims (3)

1. A filtering injector comprises an injection needle consisting of a needle body and a needle seat and a cylinder combined with the injection needle, and is characterized in that,

an annular space having an inner wall surface, an outer wall surface and a bottom surface is formed in the needle holder, and a through hole communicating with the cylinder is formed in the bottom surface,

an elastic one-way opening/closing mechanism having a cylindrical portion and a wing portion, the one-way opening/closing mechanism being provided on the inner wall surface, the wing portion having a distal end elastically contacting the outer wall surface, a filter mechanism being provided in an annular space between the one-way opening/closing mechanism and the through hole,

the filtering injector further comprises a cap which is composed of a hollow body with a sharp end and is bonded on the outer peripheral surface of the needle seat in a maintaining airtight mode, and an opening and closing mechanism which wraps the needle body is arranged in the filtering injector.

2. The filtering syringe of claim 1,

the one-way opening/closing mechanism is formed with a projection corresponding to an inner peripheral surface of the cap to deform the wing.

3. The filtering syringe of claim 1,

a protrusion corresponding to the one-way opening and closing mechanism is formed on an inner circumferential surface of the cap to realize deformation of the wing.