WO2016111400A1 - Syringe having filter - Google Patents

Abstract

The present invention relates to a syringe having a filter capable of filtering foreign substances in an injection, the syringe comprising a filter unit provided in a cylinder so as to filter foreign substances in an injection and discharge the same, the cylinder having a chamber for accommodating an injection and having a plunger assembled thereto, the forward and backward movement of the plunger introducing or discharging the injection, wherein the filter unit comprises: a body part through which two flow paths pass; a filter provided in one of the two flow paths; and a pair of membranes provided to selectively block the first and second flow paths according to the flow of the injection.

Description

Filter syringe

The present invention relates to a syringe provided with a filter that can filter foreign matter in the injection solution.

In general, the syringe is composed of a cylindrical cylinder in which the injection needle is coupled to the front end to receive the injection liquid, and a plunger provided to allow the back and forth movement in the cylinder.Injection is injected into or discharged from the cylinder as the plunger moves forward or backward. The injection is then injected into the patient.

In the meantime, foreign substances mixed into the injection liquid may be added together in the process of injecting the injection liquid to the patient by using a syringe, and the foreign substances may be mixed into the injection liquid itself or scattered in the injection liquid during the opening of the ampoule containing the injection liquid. And may be incorporated into the glass particles.

Therefore, it is necessary to prevent the foreign matter mixed in the injection solution to be administered together with the patient during the injection of the injection solution, and to solve this problem, a filter syringe capable of filtration of the foreign matter upon injection of the injection solution is provided.

As such a prior art, Korean Patent No. 10-1178986 (published date: 2012.08.31) and US Patent Publication No. 2001/0007062 (published date: 2001.07.05) filter foreign substances in the injection solution and can be injected into the patient. A syringe provided with a filter is disclosed.

However, such a prior art filter syringe has a disadvantage in that it is disadvantageous in manufacturing and has a high manufacturing cost because it is composed of a plurality of components having a complicated structure for filtering foreign substances in the injection liquid, and also has a narrow flow path structure through which the injection liquid flows. There is a disadvantage that the flow is not made smoothly.

The present invention is to solve the problems of the prior art, to provide a filter syringe that is discharged by filtering the foreign matter of the injection liquid.

A filter syringe according to the present invention includes a cylinder having a chamber in which an injection liquid is received; A plunger provided in the cylinder to enable back and forth motion; And a filter unit provided in the cylinder to filter and discharge the foreign matter of the injection liquid, the filter unit comprising: a body portion having a first flow passage and a second flow passage formed in parallel; A filter provided in any one of the first channel and the second channel; A first membrane to selectively block the first flow path according to the flow of the injection liquid, a second membrane to selectively block the second flow path according to the flow of the injection fluid, and the first flow path or the second flow path It includes; valve body having a stem inserted to connect the first membrane and the second membrane.

Preferably, in the present invention, the cross-sectional areas of the first channel and the second channel are different from each other.

More preferably, in the present invention, any one of the first channel and the second channel is a slot of a long hole, and the other is a semicircle.

Preferably, in the present invention, the first membrane and the second membrane are in surface contact with the body portion to cover the openings of the first flow path and the second flow path formed in the body part.

The filter syringe of the present invention includes a filter unit which filters and discharges foreign substances of the injection liquid into a cylinder in which the injection liquid is received, the filter unit comprising: a body portion having two flow paths formed therethrough; A filter provided in any one of two flow paths; Including a pair of membranes are provided to selectively block the first flow path and the second flow path according to the flow of the injection liquid, it is easy to manufacture and lower the manufacturing cost by minimizing the components compared to the conventional.

1 is an exploded perspective view of a filter syringe of the present invention,

2 is a cross-sectional configuration of the filter syringe of the present invention,

3 is a front view of a valve body in the filter syringe of the present invention;

Figure 4 (a) (b) is a view for explaining the operation example of the filter syringe of the present invention.

Specific structural or functional descriptions presented in the embodiments of the present invention are only illustrated for the purpose of describing the embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms. In addition, it should not be construed as limited to the embodiments described herein, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Meanwhile, terms such as first and / or second in the present invention may be used to describe various components, but the components are not limited to the terms. The above terms are for the purpose of distinguishing one component from other components only, for example, within the scope not departing from the scope of the right according to the concept of the present invention, the first component may be called a second component, Similarly, the second component may also be referred to as the first component.

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 other components may exist in between. something to do. On the other hand, when any component is said to be "directly connected" or "directly contacted" to another component, it should be understood that no other component exists in the middle. Other expressions for describing relationships between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should likewise be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. The terms "comprises" or "having" herein are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is implemented, and that one or more other features or numbers, It is to be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

As illustrated in FIG. 1, the filter syringe of the present invention includes a cylinder 110 in which a chamber 111a in which an injection liquid is accommodated is formed; A plunger (not shown) provided in the cylinder 110 so as to be movable back and forth; It is provided in the cylinder 110 includes a filter unit 200 to filter and discharge the foreign matter of the injection.

The cylinder 110 is provided with a chamber 111a in which the injection liquid is contained, and the injection liquid is introduced into or discharged into the chamber 111a by the operation of the plunger which is assembled with the cylinder 110 so as to be movable forward and backward.

One end of the cylinder 111 is provided with a neck portion 112 extending with a smaller diameter, the injection needle is assembled to the neck portion 112. The injection needle 121 is provided at the rear end with a needle holder 122 which is fitted with the neck 112 and is assembled with the neck 112.

In particular, in the present invention, the cylinder is provided with a filter unit 130 which filters and discharges foreign substances of the injection liquid, and the filter unit 130 is characterized in that the filtration is performed while selectively flowing in accordance with the flow direction of the injection liquid.

In detail, the filter unit 200 may include a body 210 having a first passage 211 and a second passage 212 penetrated therethrough, a filter 220 provided at the second passage 212, and a first passage ( The first membrane 231 to block 211, the second membrane 232 to block the second flow path 212, and the first membrane 231 and the first position to be inserted into the first flow path 211. And a valve body 230 having a stem 233 connecting the two membranes 232.

The filter unit 200 is provided inside the cylinder 110, and preferably provided in the neck portion 112. In the present embodiment, the filter unit 200 is provided in the neck portion 112, wherein the body portion 210 has a size that can be pressed and fixed in the neck portion 112.

The body portion 210 has two first flow passages 211 and a second flow passage 212 formed therethrough, wherein the first flow passage 211 and the second flow passage 212 correspond to the inlet and outlet of the injection liquid. .

For reference, the first passage 211 and the second passage 212 as the inlet and outlet of the injection solution in the present invention is not used in an absolute sense, but in the present embodiment, the first passage 211 is used as an inlet of the injection solution. It only illustrates use. Meanwhile, in this embodiment, the inflow and outflow of the injection liquid is based on the cylinder. Therefore, the inflow of the injection liquid means that the injection liquid flows into the cylinder, and the discharge of the injection liquid is used to mean that the injection liquid flows out of the cylinder. .

Preferably, the first flow passage 211 and the second flow passage 212 are different from each other, in particular, the cross-sectional area of the second flow passage 212, which is an outlet of the injection liquid, is provided larger than the first flow passage 211.

The first membrane 231 and the second membrane 232 are in close contact with both sides of the body portion 210 to block the first flow passage 211 and the second flow passage 212, and the injection solution flows in the inflow direction. If only the first passage 211 is opened in the blocked state and the flow is generated in the outflow direction, only the second passage 212 is opened in the blocked state. .

The first membrane 231 and the second membrane 232 are connected by a stem 233 inserted into the first flow passage 211. The valve body 230 including the first membrane 231, the second membrane 232, and the stem 233 is integrally manufactured by a silicone rubber, and a soft material having a predetermined elasticity may be used in addition to the silicone rubber. .

3 is a front view of the valve body viewed from the second membrane in the filter syringe of the present invention, wherein the first membrane 231 and the second membrane 232 are respectively greater than the first channel 211 and the second channel 212. It has a large area and covers each flow path, and the stem 233 connecting the first membrane 231 and the second membrane 232 is inserted and positioned in the first flow path 211.

In this embodiment, the first passage 211 is a slot that is long in the transverse direction, and the second passage 212 has a semicircular shape.

In particular, the stem 233 inserted and positioned in the first passage 211 has a circular cross section and is eccentrically inserted into the first passage 211 so that the stem 233 does not block the entire first passage 211. Provide an idle space for the injection to flow.

Therefore, when there is no flow of the injection liquid, the first membrane 231 and the second membrane 232 block the first flow passage 211 and the second flow passage 212, respectively. As the first membrane 231 is lifted in the transverse direction in the state in which 233 is fixed in the first passage 211, the first passage 211 may be opened, and the second membrane 232 may be in the longitudinal direction. The opening of the second flow passage 212 may be made.

4 (a) and 4 (b) are diagrams for explaining an operation example of the filter syringe of the present invention.

As illustrated in FIG. 4A, when a negative pressure is generated in the cylinder by reversing the piston (not shown), the first membrane 231 opens in the body portion 210 and the first flow path 211 opens. The injection solution is introduced into the cylinder, and the second flow path is blocked by the second membrane 232.

Next, as illustrated in FIG. 4B, when pressure is applied to the cylinder by the advancement of the piston (not shown), the second membrane 232 is opened from the body portion 210 and the second flow path 212. ) Is opened, and the injection liquid in the cylinder passes through the filter 210, foreign matter is filtered out and discharged to the outside of the syringe, where the first flow path is blocked by the first membrane 231.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

Claims (8)

A cylinder in which a chamber in which the injection liquid is accommodated is formed; A plunger provided in the cylinder to enable back and forth motion; A filter unit provided in the cylinder to filter and discharge foreign substances in the injection liquid, The filter unit, A body portion in which the first flow passage and the second flow passage are formed in parallel; A filter provided in any one of the first channel and the second channel; A first membrane to selectively block the first flow path according to the flow of the injection liquid, a second membrane to selectively block the second flow path according to the flow of the injection fluid, and the first flow path or the second flow path And a valve body inserted into and having a stem connecting the first membrane and the second membrane. The filter syringe of claim 1, wherein the cross-sectional areas of the first flow path and the second flow path are different from each other. 3. The filter syringe of claim 2, wherein one of the first flow path and the second flow path is a slot of a long hole, and the other is a semicircle. The filter syringe of claim 1, wherein the first membrane and the second membrane are in surface contact with the body part to cover the openings of the first flow path and the second flow path formed in the body part. A filter unit provided in the syringe to filter and discharge foreign substances in the injection, A body portion in which the first flow passage and the second flow passage are formed in parallel; A filter provided in any one of the first channel and the second channel; A first membrane to selectively block the first flow path according to the flow of the injection liquid, a second membrane to selectively block the second flow path according to the flow of the injection fluid, and the first flow path or the second flow path And a valve body inserted into and having a stem connecting the first membrane and the second membrane to each other. 6. The injection filter unit according to claim 5, wherein the cross-sectional areas of the first flow path and the second flow path are different from each other. 7. The injection filter unit according to claim 6, wherein one of the first channel and the second channel is a slot of a long hole, and the other is a semicircle. 6. The injection filter unit of claim 5, wherein the first membrane and the second membrane are in surface contact with the body portion to cover the openings of the first passage and the second passage formed in the body portion.

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