WO2016195277A1 - Filtering needle provided with slidingly detachable intake tube, and filtering syringe - Google Patents

Abstract

Provided are a filtering needle, which has a slidingly detachable intake tube coupled thereto, and a filtering syringe using same. The present invention relates to a filtering needle, which overcomes the shortcoming of a conventional filtering syringe wherein while the conventional filtering syringe performs a filtering intake and the discharge of an injectable solution using one needle, glass fragments, which do not flow deeply into the inner channel of a filter but remain between the needle and the filter, are introduced into a human body via the needle during an injection, the filtering needle being characterized in that: a needle part (10) is covered by an intake part (20) provided with an intake tube, which is slightly larger than the needle, and capable of being cut and expanded; and while the intake part slides after expansion, a connecting tube (24) inside the intake part and embedded in an inlet (16) comes out and simultaneously pulls at a strip plug (14) of the needle part, thereby closing the inlet (16) connected to the filter (15) and opening an outlet (17) connected to the needle (11). Owing to the above simple and sophisticated operation of soft components, the needle (11) remains in the state of a bidirectionally open outflow tube, not a unidirectional conduit, even after completion of an intake. Accordingly, the status of blood detection can be confirmed by inserting the filtering needle into a human body and then slightly drawing in, as in the case of a general needle, and glass fragments filtered by the filter (15) are completely separated from the needle at this moment; thus, the filtering needle has the outstanding effect of preventing a filtered substance from being reinjected into the human body in comparison with conventional filtering syringes.

Description

Filter needle and filter syringe with sliding suction tube

The present invention relates to an injection needle having a filtering suction structure and a filter syringe employing the same.

Glass ampoules, which are often used as injectable containers, generate fine glass fragments when the bottleneck is broken and opened. This debris, which is invisible but incorporated into the injection solution when the ampoule is opened, can remain inside the cylinder and needle (hereinafter referred to as the needle) and enter the body during the injection process.

Glass fragments reaching a diameter of 0.01 mm largely move along blood vessels and are attached to a specific place in the body to precipitate and cause various diseases. Therefore, a syringe with an inhalation filtering function is actively used to prevent this.

The prior art document introduced below relates to a patent in the field of filter syringes, which has recently been rapidly increasing in Korea.

The overall technical trend of filter syringes can be divided into two categories. One of them is a separate suction tube with a built-in filter at the end of the needle. The suction filter is sucked and then the suction tube is removed to remove debris from the needle. It is a flow filter structure inside the syringe which prevents the debris powder remaining in the filter from entering the discharge pipe. It is designed to change the internal flow path of the filter unit by changing the pressure direction acting differently during the suction and discharge of the injection liquid. .

In particular, the latter fluid filter structure is a filter structure that has recently attracted attention, and various derivative models have been competitively patented and registered. However, when the operation principle is looked deeply, the filter flow according to the change in the pressure direction acting on the fluid inside the needle is changed. It adopts a common design structure to change.

The advantages and disadvantages of the two filtering techniques described above are clearly divided. First, let's take a look at the separate filter structure that connects the filter-intake suction tube to the needle tip as a classic technique. Since this technology removes the filter itself after inhalation, the possibility of debris remaining inside the needle is basically blocked, but in the process of separating and removing the suction tube connected to the end of the needle by hand, there is a risk of needle contamination or user injury. Since the thickness and length of the built-in removable suction tube are never small, the biggest disadvantage is that it is difficult to use in a small ampoule or a narrow ampoule.

Next, look at the fluid filter structure with a structure that is in charge of the suction and discharge of the injection with one needle, but the suction discharge path is changed inside the filter unit.

Syringes with this technology are easy to use as they do not differ in appearance from ordinary syringes without filters. However, basically, both suction and discharge must be done with one needle, so that during the suction, when debris is completely passed through the needle and does not flow deeply into the filter inner channel but remains between the needle and the outer channel of the filter, subsequent discharge, that is, injection The problem is that debris powder can retreat back to the needle and enter the human body.

The object of the present invention is to comprehensively solve the disadvantages of the two conventional filter syringes as described above.

More specifically, the specific technical improvement intended in the present invention is to successfully meet the following essential operating conditions.

The first operating condition is to maintain the inherent advantages of the conventional detachable suction tube. The suction tube 21, which is completely separated from the injection needle, is disposed together with the needle 11 to separately inject the injection liquid. The injection needle is designed to prevent glass fragments from entering the source.

Second, in order to maintain the advantages of the syringe employing the conventional flow filter structure, the suction tube 21 is shaped to a thickness and length exceeding the minimum of the size of the needle 11 to be almost completely compatible with the existing ampoule. Place them adjacently (with virtually needles included).

As a third operating condition, the present invention should be able to easily separate the suction tube and the needle without holding the needle so that the needle does not contaminate when removing the suction tube before the injection. To this end, the suction part 20 including the suction pipe is configured to completely wrap the needle part 10 including the needle.

The essential requirement for all of these operating conditions is that the needle does not leak out even after the suction tube is separated from the needle.

In addition to the above requirements, the addition of a simple and intuitive method of operation in the overall operation process is also provided. It is implemented to have high operating reliability while mainly using materials.

The key points of the present invention for solving the above-described technical problems are as follows.

First, separate the injection liquid discharge needle (11) and the injection suction suction tube (21), but the two pipes (pipe) are placed adjacent to each other, and once the injection liquid is inhaled, only the needle alone to expose the injection The structure of the suction tube is deformed and partially cut to remove the needle from the needle.

In this process, the suction part 20 including the suction pipe 21 may be made of a soft non-toxic plastic material that may be bent or twisted. For example, soft transparent polyethylene or polyvinyl chloride material used as a cap material of a syringe or various sanitary containers may be used.

In other words, a material having a balance in strength and flexibility is basically adopted, but the structurally required portion of the suction part 20 is designed to be cut to compensate for hardening instead of securing a certain thickness of the cross section. Also, parts that should not be cut but do not require structural strength are made thinner so that they can be flexibly deformed.

When using a conventional transparent soft injection material, the suction part becomes very flexible and transparent at a part formed within a thickness of 1 mm to help the user's intuitive operation, and when the thickness exceeds 2 mm, the needle and the inner flow stopper structure The rubber ampoule membrane is well supported and has sufficient strength and hardness to penetrate.

That is, the suction unit 20 may show excessive operation that greatly deviates from the initial engagement state with the adjacent needle by the appropriate cross-sectional thickness change according to the site and the arrangement of the intentional and appropriate incision groove 26 intended accordingly.

For reference, in the design process as described above, the tip of the suction pipe 21 is preferably applied with a material sufficiently hard to penetrate the ampoule plug of the rubber membrane type and to protect the tip of the needle.

Next, an additional technical means as important as the technical idea described above is the selective opening and closing action of the filter 15 supplied with the injection liquid from the suction part 20.

As in the embodiment of the drawing, the suction pipe 21 and the filter 15 are connected to one pipe line, and the suction pipe 21 is exposed to expose the needle 11 after the injection liquid introduced into the cylinder through the pipe line is completed. After removing the filter, the pipe and the filter 15 disposed in the pipe are actually open. Even if there is a separate injection liquid discharge needle 11 in this state, it is natural that the injection liquid in the cylinder is simultaneously ejected to the filter 15 and the needle 11 when the syringe piston is pressed.

Therefore, in the present invention, the filter 15 side pipe line should be designed as a one-way permeable pipe line that is capable of inhalation but blocks the discharge until at least a complete closure is made.

In many cases the conventional technique commonly used in these conditions is a flexible membrane. When the rubber membrane that bends in only one direction in the opening manner is positioned between the filter and the syringe cylinder to open only to the cylinder, the injection liquid is only sucked through the filter and is not discharged.

However, such an elastic valve has a serious problem that should not be applied to the actual syringe.

Most injections are placed in blood vessels or muscles, where a medical practitioner must insert a needle into the patient's flesh and then suck it up slightly to check for blood inflow (normal blood vessel capture).

In this process, the unidirectional valve is opened and air can be introduced into the open filter, and the introduced air can enter the cylinder and enter the human body as it is through the needle.

Therefore, the conventional unidirectional valve structure is difficult to use in the field of filter syringes to which the present invention belongs. For reference, most commercially available syringes with a fluid filter structure (described above) can also be sucked slightly while the needle is plugged in to check for blood inflow. May be injected into the human body.

Accordingly, the present invention contemplated a kinematic structure in which the inlet hole of the filter 15 described above is closed by the operation accompanying the incision and detachment process of the suction unit 20 after the suction is completed in the initial fully open state.

Clearly, disposable needles are not large parts that are easy to design mechanically, nor are they precision parts. Particularly, as a product to be mass-produced in consideration of manufacturing cost or hygiene, the overall structure is required to have a simple and robust and reliable sealing structure.

In the present invention, an operation opening and closing mechanism is provided that provides convenience of operation while maintaining structural simplicity and sealing reliability close to existing disposable needles. That is the strip plug 14 and the peripheral configuration which interlocks with the cutting and disengaging operation of the suction unit 20.

The strip plug 14 may be made of the same material as the suction part 20 as a thin strip-shaped soft member, but may selectively use a human silicone material having excellent softness and elasticity to further strengthen the sealing force. have.

Referring to the accompanying drawings, the connection tube 24 formed on the inner circumferential surface of the suction unit 20 is slightly lodged in the inlet hole 16 of the needle unit 10 and is connected to the connection tube 24 when it is separated from the side. It can be seen that the strip plug 14 is partially drawn out of the strip through portion 13 formed in the support portion 12 of the needle to close the inlet hole 16.

In this process, a simple and reliable actuating stopper is realized utilizing the characteristics of the soft elastic material, and the strip cap 14 completes the filter closing role and then slides away from the entire suction part 20 beyond a certain range. In order to prevent breakage or rupture, the coupling state with the connection tube 24 may be properly released as necessary.

In the following, specific details supporting the above-described core technical means are further described.

According to the present invention, the filter needle is implemented to completely block the possibility that impurities such as debris powder is injected into the human body, in particular, the outer diameter of the separate suction pipe is limited to about 3 ~ 6mm close to the needle outer diameter, and the length of the suction pipe also slightly exceeds the needle length This makes it easy to use compact filter needles that can easily be used in virtually any injection ampoule without special attention from the user.

In addition, in the process of removing the suction part after inhalation of the injection solution, contamination of the needle is prevented at the source, and even after the injection, the inhaled part of the incision is easily removed.

Therefore, there is almost no inconvenience in use compared to the conventional type of the needle and the needle only consists of two parts, there is an advantage that easy disposal after use by simply reinserting the separated cap by repositioning the detached suction part.

Lastly, all of the above components can be implemented without significantly departing from the conventional injection material such as soft transparent plastic, so that the high-performance filter needle can be manufactured at a low production cost.

1 is a view showing the filter needle and the filter syringe of the present invention as a whole.

Figure 2 is a view showing the filter needle coupled to the syringe cylinder with or without the cap.

3 is an exploded view showing the main part of the filter needle.

4 is a perspective view and a cross-sectional view of the overall structure of the filter needle.

5 is a view showing a state immediately before prescription in which the needle is exposed by sliding the suction unit 20 after completing the injection of the injection.

6 and 7 illustrate the key operation structure of the filter needle in detail.

With reference to the embodiments of the present invention included in the drawings in order to specifically support the above-described problem solution of the present invention will be described in detail.

However, in the embodiments to be described below, components expressed in specific terminology and combinations thereof are not intended to limit the technical concept that is inherent in the present invention.

First, the filtering needle presented in the drawings and the detailed description may be largely divided into three technical parts, namely, the needle part 10, the suction part 20, and the cap 30.

As shown in FIG. 1, the filter needle composed of 3 parts occupies most of the technical scope of the present invention and may be an independent product in itself. It will be apparent in advance that the filter syringe configured by detachably or fixedly equipping the filter needle is also included in the technical concept of the present invention as the invention of the same category. That is, a filter syringe having a filter needle that provides independent completion functions should be construed as naturally belonging to the scope of the present invention as a group of inventions in accordance with conventional wisdom in the art.

For reference, in the present invention, three components are defined by reference numerals 10, 20, and 30, respectively, and detailed structures or accessories of each component are denoted by reference numerals 11 to 19, 21 to 29, and 31 to 39, respectively. Defined to be included in.

For example, the configuration defined by reference numerals 11 to 19 is defined as a detailed configuration belonging to the needle portion 10 and the same definition method is applied to the remaining two suction portions 20 and the cap 30 as well.

First, the overall shape and structural features of the three main components will be described with reference to FIGS. 1 to 4.

In general, the three components are overlapping each other in the order of the needle part 10-the suction part 20-the cap 30, and in particular, the suction part 20 fits well with the shape of the needle part 10. You can see the surroundings.

The plastic wrapper (not shown) is opened and the cap 30 can be inserted into the syringe cylinder intact as it is.

The outer outer cap 30 is a protective member fitted to the suction part 20 and, as necessary, a micro incision as a preliminary step of the expansion incision that assists the sliding operation of the suction part by using the opening operation of the cap, that is, a notch for cutting. configured to generate a notch. (For example, it is described as having an incision blade 36 in the embodiment.)

Needle 11 is fixed to the innermost needle portion 10, the filter 15 is disposed at the bottom and the strip plug 14 is coupled in the middle. At this time, the initial state of the strip plug 14 is a state in which the inlet hole 16 is opened and the outlet hole 17 is closed, and the injection liquid can be filtered out through the filter 15.

The suction part 20 formed to surround the needle part 10 serves to supply the injection liquid introduced through the upper suction pipe 21 toward the filter 15. Looking specifically, the suction pipe 21 formed next to the needle 11 is a pipe that can be bent from the connection pipe 24 and the connection pipe 24 is embedded in the inlet hole 16 in the initial assembly state. As will be described later, in the process of cutting, deforming, or detaching the entire suction part 20, the connecting pipe 24 is bent and leaves the inlet 16.

Suction unit 20 is a streamlined conical shape having a cross-sectional thickness range of 1mm ~ 5mm and may be injection molded into a soft transparent polymer resin.

The suction part 21 is formed above the suction part 22 and the suction part 21 adjacent to the needle 11 and below the suction part 21 is formed therein, and the suction part handle 28 is located near the lower edge of the lower part of the extension part. ) Is formed.

Next, look at the coupling structure and operation of each component through FIGS.

As described above, the suction part 20 may be partially incised when the cap 30 is removed.

To this end, the cap 30 may be further provided with a cutting blade 36 for partially cutting the cutting groove 26 in the separation process with the suction unit 20. The initial position of the cutting blade 36 corresponds to the starting point of the cutting groove 26.

The suction part 20, which is in a state where it is easy to be cut by a slight force, with the removal of the cap 30 by the preliminary configuration as described above, exposes the needle 11 upward by sliding movement toward the syringe cylinder. At the same time, the sides are long cut and expanded (opened) to break away from the needle portion 10. To this end, an incision groove 26 is formed on the side of the suction part 20, and the incision groove extends all the way to the end of the portion surrounding the needle 11.

Although one cutaway groove is illustrated in the exemplary embodiment of the drawing, two or three cutout grooves may be formed as necessary. It is advantageous that the more the suction part is opened, the more it is formed, so that the finger touches the needle part 10 so that there is a high risk of contamination.

On the other hand, the place for accommodating the needle 11 and the suction pipe 21 for sucking the injection liquid are separated from each other. Since the suction part 20 and the needle part 10 are completely separated from each other when cut to the last, to avoid this, the end of the suction pipe 21 is configured so as not to be cut so that the root part of the needle 11 after the sliding action is completely finished. Let it hang

On the other hand, the end of the suction unit 20, that is, the end of the suction tube 21 is preferably in the shape of a needle (with a certain degree of hardness) having a cross-sectional thickness so as to penetrate the ampoule plug made of a rubber film as necessary. Do.

The inner peripheral surface of the suction unit 20 is further disposed a connecting tube 24 of the flexible material for connecting between the suction pipe 21 and the filter 15, the connection tube 24 is supported on the lower support portion 12 of the needle portion It is lodged in the inlet 16 provided. In order to improve the sealing ability during operation, the end portion of the connecting pipe may partially use high-elastic human silicone (used as a prosthetic material). Of course, the entire suction part including the suction pipe 21, the expansion part 22, and the connection pipe 24 may be manufactured by one injection molding using a single material for mass production.

Look at the needle portion 10 in conjunction with the suction unit 20 in detail.

The needle part 10 is mainly concentrated in the support part 12 supporting the needle 11 lodged at the top. The strip 12 and the outlet hole 17 are further formed in the support part 12, and the inlet hole 16 and the needle part handle 18 may be formed in the root portion of the lower part of the support part.

For reference, in the exemplary embodiment based on the drawings, the support part 12 is a concept in which the support part itself is included in the needle part, and the shape feature of the needle part 20 is a comprehensive concept in the presence or absence of the support part and the shape characteristic. It is not a decision.

On the other hand, the strip stopper 14, which is a part that is assembled and assembled as a part of the needle part, is inserted into the strip through part 13 and is a core component interlocked with the suction part 20, which is also reinforced with a soft polymer resin or elasticity. Is made of silicone material.

6 and 7 show separately the core operation of the filter needle. With reference to these drawings, the process of coupling, moving and separating the moving parts will be described in detail. The drawings have been shown to be unrealistically enlarged in order to aid structural understanding, but those skilled in the art can be aided in design and application rather, such parts that are expressed unrealistically ignoring the dimensions are not intended It is important to note that it is not intended to affect the scope of rights.

When viewed from above, the suction handle 28 is disposed on both sides (y-axis direction) of the area where the incision groove 26 is formed, and the needle handle 18 and the cap in the direction orthogonal thereto (x-axis direction). The handles 38 are arranged not to overlap each other.

That is, the user can remove the cap 30 by holding the suction part handle 28 with one hand and pulling the cap handle 38 with the other hand, and in the state of grasping the suction part handle 28 as a next step. The suction cylinder 20 can be pulled down by grasping the syringe cylinder with the removed cap. In this process, the needle portion 11 does not touch any touch, thereby preventing contamination.

The strip plug 14 is connected to the connecting pipe 24 to close the inlet 16 leading to the filter 15 or the filter while interlocking with the sliding movement of the suction unit 20 and also to the outlet 11 through the outlet 11. Open the ball 17.

At this time, according to the movement of the suction unit, that is, the movement range of the expansion and exit of the connection pipe strip 14 is disconnected from the connection pipe 24 after closing the inlet hole 16 or open the outlet hole 17 Can be.

Accordingly, the injection liquid in the ampoule is filtered through the inlet 16 through the inlet 16 from the suction tube 21 through the inlet 16 in the initial state and flows into the syringe cylinder.

Then, the inlet hole 16 is closed by the strip plug 14 and the outlet hole 17 is opened to inject the injection liquid into the human body through the needle 11.

At this time, the filter 15 must be disposed below the inlet hole 16 and can be extended to the bottom of the outlet hole 17 as necessary. Arranging the filter 15 on the outlet hole 17 is a problem that can be selected as needed in the art, and whether or not the arrangement thereof does not affect the technical concept of the present invention.

Finally, by holding the needle handle 18, the suction handle (28) to the original position, and then the cap 30 can be put back again simply and safely discarded filter needle used.

By the concise and sophisticated operation of the soft parts, including the strip plug 14 as described above, the needle 11 is not blocked by the unidirectional valve that can only leak, and maintains an open tube state where both suction and discharge can be performed. Therefore, the filter needle of the present invention can perform a function to check whether blood is detected by sucking slightly after inserting the human body like a normal needle without any problem, and the glass debris filtered by the filter 15 is completely isolated from the needle.

The technical spirit of the present invention has been described above through specific examples. In addition, there may be a simple change or a simple expansion example not included in the present embodiment, but the technical spirit of the present invention should be interpreted based on the contents described in the following claims rather than the technical interpretation of the embodiment.

<Description of the code>

10: Needle part

11: needle 12: support

13: strip penetration 14: strip plug

15: filter 16: inlet hole

17: outflow hole 18: needle handle

20: suction part

21: suction line 22: suction side

24: connector 26: incision groove

28: suction handle

30: cap

32: cap fixing frame

36: incision blade 38: cap handle

Claims (7)

Needle portion 10 is fixed to the upper portion, the filter 15 is disposed at the lower portion and the needle portion 10 is coupled to the strip stopper 14 in the middle; and And a suction part 20 formed to surround the needle part 10 and supplying the injection liquid introduced through the upper suction pipe 21 toward the filter 15. The strip plug 14 is connected to the sliding movement of the suction unit 20, the filter needle, characterized in that for closing the filter (15) or the inlet hole (16) through the filter. The method of claim 1, The inlet groove 26 is further formed on the side of the suction part 20, In addition, the suction part 20 is a filter needle, characterized in that the side of the incision is extended at the same time is extended to the bottom of the needle part 10 while exposing the needle (11) upward by sliding movement. The method of claim 2, The suction part 20, the cap 30; is fitted, Filter cap, characterized in that the cap 30 is further provided with a cutting blade 36 for partially cutting the cutting groove 26 in the separation process with the suction unit (20). The method according to claim 2 or 3, On the inner circumferential surface of the suction unit 20 is further disposed a connecting tube 24 of a flexible material connecting the suction pipe 21 and the filter 15, The strip plug 14 is connected to the connecting pipe 24, the filter needle, characterized in that the peristalsis with the suction unit (20). The method of claim 4, wherein The needle portion 10 is further formed with a strip through portion 13 and the outlet hole 17, The strip plug 14 is inserted into the strip through portion 13 and the filter needle, characterized in that for opening the outlet hole 17 in the process of interlocking with the suction portion (20). The method of claim 5, The filter plug, characterized in that configured to be disconnected from the connecting pipe (24) after closing the inlet hole (16) or open the outlet hole (17). A filter syringe configured to equip the filter needle according to any one of claims 1 to 3 in a detachable or fixed manner.

Images