Filter assembly for syringe, and syringe and ringer assembly comprising same

Abstract

The present invention relates to a filter assembly for a syringe which filters and collects foreign substances drawn together with medicinal fluid from an ampoule when the medicinal fluid of the ampoule is sucked into a syringe, and blocks the collected foreign substances from flowing and being injected together with the medicinal fluid when the medicinal fluid in the syringe is injected into thehuman body so as to only allow the medicinal fluid to be injected; and to a syringe and a ringer assembly comprising the same. The filter assembly for a syringe comprises: a needle holder for fixing asyringe needle to a front end and a neck unit of a cylinder is fitted into a rear end. A filter unit is inserted between the needle holder and the front end of the neck unit. The filter unit comprises: a support member having a head unit forming a hollow in the horizontal direction at the center, the side surface extending outward from the front portion adhering to a corresponding inner circumference of the needle holder, and one or more through-holes penetrating in the front and back directions along a circumference between the hollow and an outer lateral edge, and an extension tube formed extensively from a rear central portion of the head unit to a rear portion thereof; a trumpet shaped valve member having a skirt unit in which a front end unit covers at least an outer peripheral surface of the through-holes disposed on the front surface of the support member, and an extension unit in which a rear end unit extended toward a rear portion of the inner circumference of the rear surface of the skirt unit comes into contact with the rear end of the hollow of the support member or is protruding to form the extension unit with a cut-out line on a center portion of the rear end portion; and a filter having a front end unit coupled in a way that the same covers a lateral wall of the extension tube adjacent to the head unit, wherein the front end unit has a pouch shaped opening.

Description

technical field [0001] The present invention relates to a method for filtering and trapping the foreign matter mixed with the liquid medicine when sucking the medicine liquid in the ampoule into the syringe, and cutting off the captured foreign matter from flowing into the human body when the medicine liquid in the syringe is injected into the human body, and only A filter assembly for injecting a syringe and an assembly of a syringe and an infusion set. Background technique [0002] Usually, the syringe inhales and discharges the liquid medicine according to the reciprocating motion of the cylinder to the piston, and a needle holder for fixing the injection needle is detachably installed on the collar of the cylinder for inhaling and discharging the liquid medicine. [0003] In addition, the medicinal solution is a mixture of liquid and powder or liquid, and is mainly packed in an ampoule made of glass or plastic material. When in use, cut off the collar of the ampoule to o...

AI Technical Summary

Problems solved by technology

[0019] And, in order to prevent this phenomenon, thicker than when forming the baffle plate 12 position, it is difficult to expand the incision line 18 when injecting liquid medicine.

[0020] According to Patent Document 1, since the incision line 18 restricts the flow of the medical solution, not only the pressure that can pass through the piston is required, but also the time required to store the medical solution and inject the medical solution is increased.

[0021] Moreover, the filtering structure 10 is fixed on the inner wall or the pillar portion 16 of the needle holder 22 in a barely inserted manner, but the cylindrical main body 14 that is barely inserted is a soft material including the baffle plate 12 and the frame film 24. During the inhalation process, The fixed state may be released by the pressure of the liquid medicine flowing into the cylinder, and the space (Δd1xΔdxn) between the plurality of pillar parts 16 needs to be set narrower

[0022] In addition, the filter 20 of Patent Document 1 is inserted inwardly from the rear of the cylindrical body 14, and it is difficult to secure the inner area of ​​the cylindrical body 14 made of a soft material including the filter 20.

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