WO2007117119A1 - Needle connecting device, filter device and medicine injection apparatus comprising the filter device - Google Patents

Needle connecting device, filter device and medicine injection apparatus comprising the filter device Download PDF

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Publication number
WO2007117119A1
WO2007117119A1 PCT/KR2007/001752 KR2007001752W WO2007117119A1 WO 2007117119 A1 WO2007117119 A1 WO 2007117119A1 KR 2007001752 W KR2007001752 W KR 2007001752W WO 2007117119 A1 WO2007117119 A1 WO 2007117119A1
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WO
WIPO (PCT)
Prior art keywords
filter
injection
connecting device
needle connecting
communicate
Prior art date
Application number
PCT/KR2007/001752
Other languages
French (fr)
Inventor
Young Mu Kim
Original Assignee
Young Mu Kim
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Young Mu Kim filed Critical Young Mu Kim
Publication of WO2007117119A1 publication Critical patent/WO2007117119A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Definitions

  • the present invention relates to a needle connecting device of a medicine injection apparatus, a filter device and a medicine injection apparatus having the same, and more particularly, to a needle connecting device of a medicine injection apparatus, a filter device and a medicine injection apparatus having the same, which are configured more effectively to be capable of easily removing foreign materials and air contained in an injection.
  • FIG. 1 is a perspective view showing one example of a conventional medicine injection apparatus, which is disclosed in U.S. Patent number 4,781,698.
  • a medicine injection apparatus 100 includes an injection storing means 102, such as a bottle or pack, in which an injection is stored, and a flexible extension tube 104 extending from the injection storing means 102 to allow the injection supplied from the injection storing means 102 to be delivered.
  • an injection storing means 102 such as a bottle or pack
  • a flexible extension tube 104 extending from the injection storing means 102 to allow the injection supplied from the injection storing means 102 to be delivered.
  • An instillator 106 is integrally provided on the extension tube 104 such that the in- stillator is partially inserted into the injection storing means 102 at an upstream end of the extension tube to instill the injection.
  • a control means 108 is provided at a middle portion of the extension tube 104 so as to control an amount of injection by blocking the flow of injection flowing along the extension tube 104.
  • a filter unit 110 for filtering off foreign materials and air contained in the supplied injection is provided, and a needle connecting device 112 is provided at a terminal end of the corresponding extension tube 104 such that an injection needle 10 to be inserted into the body of a patient is detachably coupled to the needle connecting device.
  • extension tube 104 is configured to have same inner diameter throughout the entire movement path of injection, and a well-known catheter or the like, instead of the injection needle 10, may also be coupled to the needle connecting device 112 of the extension tube 104.
  • a cap (not shown) is coupled to the needle connecting device 112 in order to prevent it from being contaminated before usage, the corresponding cap is removed and wasted when using the needle connecting device 112, and the injection needle 10 or a catheter is coupled to the needle connecting device 112.
  • 112a protrudes at the center of a leading end of the needle connecting device 112, and a communication hole 112a- 1 is formed at the center of the protruding boss 112a to supply an injection.
  • a cylindrical outer wall 112b is formed integrally with the protruding boss 112a so as to surround it and be spaced apart therefrom.
  • a female thread 112b- 1 is formed on an inner side of the outer wall 112b, and a plurality of projections 112b-2 are formed on an outer side of the corresponding outer wall 112b.
  • a cylindrical handle 112c is integrally formed at the rear of the outer wall 112b of the needle connecting device 112 to extend with the substantially same diameter.
  • a communication hole (not shown) is formed in the handle 112c to allow an injection to be supplied, and a plurality of projections 112c-l are formed on an outer side of the handle 112c.
  • the injection needle 10 to be coupled to the leading end of the needle connecting device 112 includes a body 12 and a needle 14, which are integrally formed, wherein the body 12 in the shape of a cylinder has a through hole 12a formed therein such that the protruding boss 112a is inserted into the through hole 12a, and an enlarged coupler 12b having an enlarged diameter is formed on an outer side of a trailing end of the body 12.
  • the body 12 of the injection needle 10 is inserted into the outer wall 112b of the needle connecting device 112, i.e., the protruding boss 112a of the needle connecting device 112 is inserted into the body 12 of the injection needle 10, whereby the injection needle 10 and the needle connecting device 112 are coupled to each other.
  • the enlarged coupler 12b of the body 12 of the injection needle 10 is screwed to and inserted into the female thread 112b- 1 on the inner side of the outer wall 112b of the needle connecting device 112.
  • the injection needle 10 and the needle connecting device 112 are airtightly coupled to each other, and the communication hole 112a- 1 of the protruding boss 112a and the through hole 12a of the injection needle 10 communicate with each other therein.
  • a user grips and rotates the handle 112c or the outer wall 112b of the needle connecting device 112.
  • the plurality of projections 112c- 1 and 112b-2 are formed on the outer side of the corresponding handle 112c or the outer wall 112b, the force of the user can be easily exerted thereon when the user rotates the needle connecting device 112.
  • each of the needle connecting device 112 and the body 12 of the injection needle 10 is made of synthetic resin material in a single piece.
  • the control means 108 is used to control an amount of injection. Then, the injection filled in the injection storing means 102 is discharged and supplied little by little and then flows along the extension tube 104. Thereafter, the injection is finally injected to the body of the patient through the injection needle 10 coupled to the needle connecting device 112.
  • the aforementioned filter unit 110 is provided on the path of the extension tube 104.
  • the filter unit 110 includes filter receiving plates 110a- 1 and 110a-2 made of synthetic resin, which are provided in parallel to define the outside of the filter unit 110 and spaced apart from each other to define a predetermined space therein, and both ends of each of the two filter receiving plates 1 lOa-1 and 110a-2 are converged and coupled to the extension tube 104 so that the two filter receiving plates internally communicate with the extension tube 104.
  • Two thin sheet-shaped filters 110b- 1 and 110b-2 are also accommodated and provided to be parallel in the inner space defined by both the filter receiving plates 1 lOa-1 and 110a-2.
  • the liquid-permeable filter 110b- 1 is provided at a side into which an injection is introduced, and the gas-permeable filter 110b-2 is provided at a side next thereto.
  • the filters 110b- 1 and 110b-2 are made of porous synthetic resin with predetermined meshes.
  • an air discharging holes 1 lOa-2-1 is formed at a corresponding position on the filter receiving plate 110a-2 at which the gas-permeable filter 110b-2 is provided.
  • the filters 110b- 1 and 110b-2 as provided above in the prior art block the path of injection, so that the injection directly passes through the filters 110b- 1 and 110b-2 and such passage causes flow rate and velocity of the injection to be greatly lowered, which may result in a problem in a suitable injecting amount.
  • the conventional filter unit 110 is provided with two filters, i.e., the liquid-permeable filter l lOb-1 and the gas-permeable filter 110b-2, considering the corresponding filters 110b- 1 and 110b-2 are very expensive, the use of the two filters causes the manufacturing costs to increase.
  • An object of the present invention is to provide a needle connecting device of a medicine injection apparatus, in which a filter unit is integrally formed on the needle connecting device, an injection does not directly pass through the filter, and only a gas- permeable filter is used.
  • Another object of the present invention is to provide a filter device, which can substitute for a conventional liquid-permeable filter by collecting and removing foreign materials through a trap space structure and also overcome limitations in various kinds of injectable injections caused since an injection directly passes through a filter.
  • a further object of the present invention is to provide a medicine injection apparatus having the filter device with the aforementioned features.
  • a needle connecting device of a medicine injection apparatus for achieving the objects is provided at a terminal end of an extension tube for allowing an injection to be supplied therethrough, the needle connecting device including a leading end to which an injection needle is detachably coupled and a trailing end with a handle integrally formed to extend.
  • the needle connecting device comprises a filter- functioning unit integrally provided at the handle to remove a foreign material and air contained in the supplied injection.
  • the filter- functioning unit may include a filter receiving plate provided to define an outside of the filter-functioning unit and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the handle; an inflow hole provided in one end of the filter- functioning unit to communicate with a communication hole in an inflow side of the handle; an inner protruding tube extending in a horizontal direction in the filter-functioning unit opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with a communication hole of an outflow side of the handle and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
  • the filter- functioning unit further include a gas-permeable filter fixedly provided on an inner side of the filter receiving plate. More preferably, at least one air discharging hole may be provided in the filter receiving plate at the position where the gas-permeable filter is provided.
  • the inflow and outflow holes preferably have a relatively smaller inner diameter than the communication hole of the handle.
  • the needle connecting device further comprise a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space. More preferably, the needle connecting device may further comprise a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
  • a filter device is connected to a liquid medicine supply line to remove a foreign material and air contained in liquid medicine.
  • the filter device comprises a filter receiving plate provided to define an outside of the filter device and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the liquid medicine supply line; an inflow hole provided in one end of the filter device to communicate with an inflow side of the liquid medicine supply line; an inner protruding tube extending in a horizontal direction in the filter device opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with an outflow side of the liquid medicine supply line and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
  • the filter device further comprise a gas-permeable filter fixedly provided on an inner side of the filter receiving plate. More preferably, at least one air discharging hole may be provided in the filter receiving plate at the position where the gas-permeable filter is provided.
  • the inflow and outflow holes have a relatively smaller inner diameter than the liquid medicine supply line and the outflow opening.
  • the filter device further comprise a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space. More preferably, the filter device may further comprise a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
  • a medicine injection apparatus of the present invention includes a filter device connected to a liquid medicine supply line to remove a foreign material and air contained in liquid medicine, wherein the filter device comprises a filter receiving plate provided to define an outside of the filter device and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the liquid medicine supply line; an inflow hole provided in one end of the filter device to communicate with an inflow side of the liquid medicine supply line; an inner protruding tube extending in a horizontal direction in the filter device opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with an outflow side of the liquid medicine supply line and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
  • the filter device further comprise a gas-permeable filter fixedly provided on an inner side of the filter receiving plate. More preferably, at least one air discharging hole may be provided in the filter receiving plate at the position where the gas-permeable filter is provided.
  • the inflow and outflow holes have a relatively smaller inner diameter than the liquid medicine supply line and the outflow opening.
  • the filter device further comprise a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space. More preferably, the filter device may further comprise a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
  • the superior advantages can be achieved as follows. That is, since foreign materials are collected and removed through a trap space structure, a conventional liquid-permeable filter can be omitted to thereby reduce the manufacturing costs. Also, since a filter-functioning unit is provided integrally in a needle connecting device, as compared with a prior art in which they are provided separately, the present invention is more advantageous in terms of productivity and manufacturing cost. Most of all, the present invention can overcome limitations in various kinds of injectable injections caused since an injection directly passes through a filter. Brief Description of the Drawings
  • FIG. 1 is a perspective view showing a conventional medicine injection apparatus
  • FIG. 2 is a perspective view showing that an injection needle is coupled to a needle connecting device of the conventional medicine injection apparatus
  • FIG. 3 is a partially sectional view showing that the injection needle is coupled to the needle connecting device of the conventional medicine injection apparatus;
  • FIG. 4 is a sectional view showing a filter unit of the conventional medicine injection apparatus
  • FIG. 5 is a transverse sectional view showing a needle connecting device of a medicine injection apparatus according to the present invention.
  • FIG. 6 is a longitudinal sectional view showing the needle connecting device of the medicine injection apparatus according to the present invention. Mode for the Invention
  • FIGs. 5 and 6 are a transverse sectional view and a longitudinal sectional view showing a needle connecting device of a medicine injection apparatus according to present invention.
  • a needle connecting device 200 to which an injection needle 10 or catheter to be inserted into a patient is detachably coupled, is provided at a terminal end of an elongated extension tube 104 of a medicine injection apparatus 100.
  • a cylindrical protruding boss 202 is integrally formed at a leading end of the needle connecting device 200 to protrude at its center, so that the protruding boss 202 is inserted into a body 12 of the injection needle 10 coupled thereto and a communication hole 202a through which an injection is supplied is formed at the center of the protruding boss 202.
  • a cylindrical outer wall 204 is formed integrally with the protruding boss 202 so as to surround it and be spaced apart therefrom.
  • a female thread 204a is formed on an inner side of the outer wall 204 so that an enlarged coupler 12b formed at a trailing end of the body 12 of the injection needle 10 to be coupled is screwed with the female thread 204a.
  • a cylindrical handle 206 is integrally formed at the rear of the outer wall
  • the handle 206 mainly serves to give a grip to a user.
  • a filter-functioning unit 210 is integrally provided at the handle 206 of the needle connecting device 200.
  • the filter- functioning unit 210 has a generally flat shape to be narrow in a vertical direction but wide in a horizontal direction. That is, filter receiving plates 212, which are respectively provided as upper and lower sides of the filter- functioning unit 210, are rounded to be gently convex, so that a predetermined space is defined in the filter- functioning unit 210 by the upper and lower filter receiving plates 212. Edge portions of the upper and lower filter receiving plates 212 are coupled to each other to be sealed.
  • both ends of the upper and lower filter receiving plates 212 respectively converge and are coupled so that they internally communicate with a communication hole 206a of the handle 206.
  • a side of the handle 206 into which an injection is firstly introduced with respect to the filter-functioning unit 210 is referred to as an inflow side of the handle 206, while a side of the handle 206 to which an injection having passed through the corresponding filter-functioning unit 210 is supplied thereafter is referred to as an outflow side of the handle 206.
  • the filter- functioning unit 210 has an inflow hole 214 provided at an inner center of its one end in order to communicate with the communication hole 206a of the inflow side of the handle 206.
  • the inflow hole 214 has a relatively smaller inner diameter than the communication hole 206a of the inflow side of the handle 206, so that an injection passing through the inflow hole 214 increases in its velocity and the injection in the inner space is also prevented from flowing backward.
  • an inner protruding tube 218 is formed to extend in a horizontal direction in the inner space opposite to the inflow hole 214.
  • An outflow opening 218b is formed in the inner protruding tube 218 to communicate with the communication hole 206a of the outflow side of the handle 206, and an outflow hole 218a is formed at the center of a leading end of the inner protruding tube 218 to communicate with the outflow opening 218b therein.
  • the outflow hole 218a has a relatively smaller inner diameter than the outflow opening 218b, thereby preventing an injection from flowing backward from the outflow opening 218b and also maximally preventing foreign materials or air contained in the injection in the inner space from leaking.
  • a conduction feature 218c having a general hat shape is integrally provided on an outer surface of the leading end of the inner protruding tube 218 so as to smoothly guide the injection, which is introduced from the inflow hole 214, to the right and left side of the inner space.
  • a blocking protrusion 218d is integrally formed on outer surfaces of right and left sides of a middle portion of the inner protruding tube 218 to protrude vertically.
  • the inner space is divided into right and left sides with the horizontal inner protruding tube 218 interposed therebetween, and each of the divided right and left sides of the inner space is also divided into front and rear sides by the vertical blocking protrusion 218d.
  • the inner space at the rear side of the blocking protrusion 218d is a trap space 219 in which foreign materials contained in the injection are collected as described below.
  • a guide feature 216 is integrally formed on an inner side around the inflow hole 214 in a shape corresponding to the conduction feature 218c of the inner protruding tube 218 so as to smoothly guide the injection, which is introduced into the inner space through the corresponding inflow hole 214, to the right and left sides of the inner space.
  • the guide feature 216 also prevents the injection in the right and left sides of the inner space from flowing back.
  • a gas-permeable filter 213 is provided to be suitably fixed on an inner side of the filter receiving plate 212 of the filter- functioning unit 210, and at least one air discharging hole 212a is formed at a suitable position of the filter receiving plate 212, where the gas-permeable filter 213 is provided, so that the air discharging hole 212a communicates with the outside.
  • the corresponding injection is introduced into the needle connecting device 200.
  • the injection is introduced into the communication hole 206a in the inflow side of the handle 206 of the needle connecting device 200 and then passes through the inflow hole 214 of the filter- functioning unit 210 with increasing its velocity.
  • the portion of the injection containing foreign materials and air which has moved to an outside of the inner space, also moves to the right and left sides of the inner space after passing through between the conduction feature 218c at the leading end of the inner protruding tube 218 and the guide feature 216 corresponding thereto due to the high velocity, and then flows into the trap space 219 through the blocking protrusion 218d.
  • the injection flows round in the closed trap space 219, and the contained foreign materials are collected in the trap space 219.
  • the air contained in the injection moved to the right and left sides of the inner space firstly passes through the gas-permeable filter 213 and is then discharged out through the air discharging hole 212a to be removed.
  • the filter- functioning unit 210 is an improvement as compared with the conventional filter unit 110 even individually.
  • the corresponding filter-functioning unit 210 is integrally provided in the needle connecting device 200, the corresponding filter- functioning unit 210 can be provided as a separate part and in such a case, the filter- functioning unit 210 can also be provided in the middle of the extension tube 104.

Abstract

The present invention relates to a needle connecting device of a medicine injection apparatus, a filter device and a medicine injection apparatus having the same. A needle connecting device according to the present invention is provided at a terminal end of an extension tube for allowing an injection to be supplied therethrough, the needle connecting device including a leading end to which an injection needle is detachably coupled and a trailing end with a handle integrally formed to extend. The needle connecting device comprises a filter- functioning unit integrally provided at the handle to remove a foreign material and air contained in the supplied injection. Therefore, superior advantages can be achieved as follows: since foreign materials are collected and removed through a trap space structure, a conventional liquid-permeable filter can be omitted to thereby reduce the manufacturing costs; since a filter- functioning unit is provided integrally in a needle connecting device, as compared with a prior art in which they are provided separately, the present invention is more advantageous in terms of productivity and manufacturing cost; and most of all, the present invention can overcome limitations in various kinds of injectable injections caused since an injection directly passes through a filter.

Description

Description
NEEDLE CONNECTING DEVICE, FILTER DEVICE AND MEDICINE INJECTION APPARATUS COMPRISING THE
FILTER DEVICE
Technical Field
[1] The present invention relates to a needle connecting device of a medicine injection apparatus, a filter device and a medicine injection apparatus having the same, and more particularly, to a needle connecting device of a medicine injection apparatus, a filter device and a medicine injection apparatus having the same, which are configured more effectively to be capable of easily removing foreign materials and air contained in an injection. Background Art
[2] Generally, there are frequent occasions when patients require to inject an injection
(or, liquid medicine), and a medicine injection apparatus is used at this time.
[3] Fig. 1 is a perspective view showing one example of a conventional medicine injection apparatus, which is disclosed in U.S. Patent number 4,781,698.
[4] A medicine injection apparatus 100 includes an injection storing means 102, such as a bottle or pack, in which an injection is stored, and a flexible extension tube 104 extending from the injection storing means 102 to allow the injection supplied from the injection storing means 102 to be delivered.
[5] An instillator 106 is integrally provided on the extension tube 104 such that the in- stillator is partially inserted into the injection storing means 102 at an upstream end of the extension tube to instill the injection. In addition, a control means 108 is provided at a middle portion of the extension tube 104 so as to control an amount of injection by blocking the flow of injection flowing along the extension tube 104. Further, a filter unit 110 for filtering off foreign materials and air contained in the supplied injection is provided, and a needle connecting device 112 is provided at a terminal end of the corresponding extension tube 104 such that an injection needle 10 to be inserted into the body of a patient is detachably coupled to the needle connecting device.
[6] Here, the extension tube 104 is configured to have same inner diameter throughout the entire movement path of injection, and a well-known catheter or the like, instead of the injection needle 10, may also be coupled to the needle connecting device 112 of the extension tube 104.
[7] In addition, a cap (not shown) is coupled to the needle connecting device 112 in order to prevent it from being contaminated before usage, the corresponding cap is removed and wasted when using the needle connecting device 112, and the injection needle 10 or a catheter is coupled to the needle connecting device 112.
[8] Referring to Figs. 2 and 3 in relation to the foregoing, a cylindrical protruding boss
112a protrudes at the center of a leading end of the needle connecting device 112, and a communication hole 112a- 1 is formed at the center of the protruding boss 112a to supply an injection.
[9] In addition, a cylindrical outer wall 112b is formed integrally with the protruding boss 112a so as to surround it and be spaced apart therefrom. A female thread 112b- 1 is formed on an inner side of the outer wall 112b, and a plurality of projections 112b-2 are formed on an outer side of the corresponding outer wall 112b.
[10] Furthermore, a cylindrical handle 112c is integrally formed at the rear of the outer wall 112b of the needle connecting device 112 to extend with the substantially same diameter. A communication hole (not shown) is formed in the handle 112c to allow an injection to be supplied, and a plurality of projections 112c-l are formed on an outer side of the handle 112c.
[11] Meanwhile, the injection needle 10 to be coupled to the leading end of the needle connecting device 112 includes a body 12 and a needle 14, which are integrally formed, wherein the body 12 in the shape of a cylinder has a through hole 12a formed therein such that the protruding boss 112a is inserted into the through hole 12a, and an enlarged coupler 12b having an enlarged diameter is formed on an outer side of a trailing end of the body 12.
[12] Thus, the body 12 of the injection needle 10 is inserted into the outer wall 112b of the needle connecting device 112, i.e., the protruding boss 112a of the needle connecting device 112 is inserted into the body 12 of the injection needle 10, whereby the injection needle 10 and the needle connecting device 112 are coupled to each other. At this time, the enlarged coupler 12b of the body 12 of the injection needle 10 is screwed to and inserted into the female thread 112b- 1 on the inner side of the outer wall 112b of the needle connecting device 112. Accordingly, the injection needle 10 and the needle connecting device 112 are airtightly coupled to each other, and the communication hole 112a- 1 of the protruding boss 112a and the through hole 12a of the injection needle 10 communicate with each other therein. At this time, when desiring to couple the injection needle 10 to the needle connecting device 112, a user grips and rotates the handle 112c or the outer wall 112b of the needle connecting device 112. In this case, since the plurality of projections 112c- 1 and 112b-2 are formed on the outer side of the corresponding handle 112c or the outer wall 112b, the force of the user can be easily exerted thereon when the user rotates the needle connecting device 112.
[13] Of course, such a coupling manner of the injection needle 10 may be applied identically to the cap.
[14] In addition, each of the needle connecting device 112 and the body 12 of the injection needle 10 is made of synthetic resin material in a single piece.
[15] Meanwhile, the usage and operation of the medicine injection apparatus 100 configured as mentioned above will be described as follows. In order to give a predetermined injection to the body of a patient, an insert of the instillator 106 at a side of the extension tube 104 is inserted into and connected to the injection storing means 102 such as a Ringer's solution bottle, the cap coupled to the needle connecting device 112 of the extension tube 104 is removed, and the injection needle 10 is coupled thereto.
[16] In addition, after a user (e.g., a nurse or the like) inserts the injection needle 10 into the body of a patient, the control means 108 is used to control an amount of injection. Then, the injection filled in the injection storing means 102 is discharged and supplied little by little and then flows along the extension tube 104. Thereafter, the injection is finally injected to the body of the patient through the injection needle 10 coupled to the needle connecting device 112.
[17] Meanwhile, if any foreign materials (e.g., glass fragments generated when cutting out a glass ample) and air injected together with the injection is injected into the body of a patient when injection, the brain or blood vessels of the patient may be damaged to thereby cause fatal danger. Thus, in order to prevent such problems, the aforementioned filter unit 110 is provided on the path of the extension tube 104.
[18] Referring to a sectional view of Fig. 4, the filter unit 110 includes filter receiving plates 110a- 1 and 110a-2 made of synthetic resin, which are provided in parallel to define the outside of the filter unit 110 and spaced apart from each other to define a predetermined space therein, and both ends of each of the two filter receiving plates 1 lOa-1 and 110a-2 are converged and coupled to the extension tube 104 so that the two filter receiving plates internally communicate with the extension tube 104.
[19] Two thin sheet-shaped filters 110b- 1 and 110b-2 are also accommodated and provided to be parallel in the inner space defined by both the filter receiving plates 1 lOa-1 and 110a-2. At this time, the liquid-permeable filter 110b- 1 is provided at a side into which an injection is introduced, and the gas-permeable filter 110b-2 is provided at a side next thereto. Here, the filters 110b- 1 and 110b-2 are made of porous synthetic resin with predetermined meshes.
[20] In addition, an air discharging holes 1 lOa-2-1 is formed at a corresponding position on the filter receiving plate 110a-2 at which the gas-permeable filter 110b-2 is provided.
[21] Thus, if an injection supplied from the injection storing means 102 is introduced into the filter unit 110, foreign materials such as glass fragments contained in the corresponding injection are firstly filtered off while the injection passes through the liquid-permeable filter 110b- 1. Then, air contained in the injection passes through the gas-permeable filter 110b-2 and vents out through the air discharging hole 1 lOa-2-1 while the corresponding injection passes through the gas-permeable filter 110b-2, thereby removing the contained air. Thus, the injection completely free from foreign materials and air is continuously supplied.
[22] However, the filters 110b- 1 and 110b-2 as provided above in the prior art block the path of injection, so that the injection directly passes through the filters 110b- 1 and 110b-2 and such passage causes flow rate and velocity of the injection to be greatly lowered, which may result in a problem in a suitable injecting amount. Thus, there is a problem of the limitation that an injection with relatively high viscosity or an injection with relatively large particles dissolved therein cannot be injected.
[23] That is, there are many limitations in various kinds of injections which the conventional medicine injection apparatus 100 can inject.
[24] In addition, various means such as the instillator 106, the filter unit 110 and the needle connecting device 112 are independently provided on the extension tube 104 in the prior art, thereby decreasing productivity and increasing manufacturing costs.
[25] That is, since all the filter unit 110 and the needle connecting device 112 are made of synthetic resin, it would be more advantageous in aspect of productivity and manufacturing costs if they are integrated into one unit.
[26] Furthermore, since the conventional filter unit 110 is provided with two filters, i.e., the liquid-permeable filter l lOb-1 and the gas-permeable filter 110b-2, considering the corresponding filters 110b- 1 and 110b-2 are very expensive, the use of the two filters causes the manufacturing costs to increase.
Disclosure of Invention
Technical Problem
[27] The present invention is conceived to solve the aforementioned problems in the prior art. An object of the present invention is to provide a needle connecting device of a medicine injection apparatus, in which a filter unit is integrally formed on the needle connecting device, an injection does not directly pass through the filter, and only a gas- permeable filter is used.
[28] Another object of the present invention is to provide a filter device, which can substitute for a conventional liquid-permeable filter by collecting and removing foreign materials through a trap space structure and also overcome limitations in various kinds of injectable injections caused since an injection directly passes through a filter.
[29] A further object of the present invention is to provide a medicine injection apparatus having the filter device with the aforementioned features.
[30] The above objects and various advantages of the present invention will be more clearly understood from preferred embodiments explained below with reference to the accompanying drawings by those having ordinary skill in the art. Technical Solution
[31] A needle connecting device of a medicine injection apparatus according to the present invention for achieving the objects is provided at a terminal end of an extension tube for allowing an injection to be supplied therethrough, the needle connecting device including a leading end to which an injection needle is detachably coupled and a trailing end with a handle integrally formed to extend. The needle connecting device comprises a filter- functioning unit integrally provided at the handle to remove a foreign material and air contained in the supplied injection.
[32] The filter- functioning unit may include a filter receiving plate provided to define an outside of the filter-functioning unit and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the handle; an inflow hole provided in one end of the filter- functioning unit to communicate with a communication hole in an inflow side of the handle; an inner protruding tube extending in a horizontal direction in the filter-functioning unit opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with a communication hole of an outflow side of the handle and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
[33] According to an embodiment of the present invention, it is preferred that the filter- functioning unit further include a gas-permeable filter fixedly provided on an inner side of the filter receiving plate. More preferably, at least one air discharging hole may be provided in the filter receiving plate at the position where the gas-permeable filter is provided.
[34] According to an embodiment of the present invention, the inflow and outflow holes preferably have a relatively smaller inner diameter than the communication hole of the handle.
[35] In addition, according to an embodiment of the present invention, it is preferred that the needle connecting device further comprise a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space. More preferably, the needle connecting device may further comprise a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
[36] A filter device according to the present invention is connected to a liquid medicine supply line to remove a foreign material and air contained in liquid medicine. The filter device comprises a filter receiving plate provided to define an outside of the filter device and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the liquid medicine supply line; an inflow hole provided in one end of the filter device to communicate with an inflow side of the liquid medicine supply line; an inner protruding tube extending in a horizontal direction in the filter device opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with an outflow side of the liquid medicine supply line and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
[37] According to an embodiment of the present invention, it is preferred that the filter device further comprise a gas-permeable filter fixedly provided on an inner side of the filter receiving plate. More preferably, at least one air discharging hole may be provided in the filter receiving plate at the position where the gas-permeable filter is provided.
[38] According to an embodiment of the filter device of the present invention, it is preferred that the inflow and outflow holes have a relatively smaller inner diameter than the liquid medicine supply line and the outflow opening.
[39] According to an embodiment of the present invention, it is preferred that the filter device further comprise a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space. More preferably, the filter device may further comprise a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
[40] A medicine injection apparatus of the present invention includes a filter device connected to a liquid medicine supply line to remove a foreign material and air contained in liquid medicine, wherein the filter device comprises a filter receiving plate provided to define an outside of the filter device and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the liquid medicine supply line; an inflow hole provided in one end of the filter device to communicate with an inflow side of the liquid medicine supply line; an inner protruding tube extending in a horizontal direction in the filter device opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with an outflow side of the liquid medicine supply line and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
[41] According to an embodiment of the medicine injection apparatus of the present invention, it is preferred that the filter device further comprise a gas-permeable filter fixedly provided on an inner side of the filter receiving plate. More preferably, at least one air discharging hole may be provided in the filter receiving plate at the position where the gas-permeable filter is provided.
[42] According to an embodiment of the medicine injection apparatus of the present invention, it is preferred that the inflow and outflow holes have a relatively smaller inner diameter than the liquid medicine supply line and the outflow opening.
[43] According to an embodiment of the medicine injection apparatus of the present invention, it is preferred that the filter device further comprise a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space. More preferably, the filter device may further comprise a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
Advantageous Effects
[44] According to the present invention, the superior advantages can be achieved as follows. That is, since foreign materials are collected and removed through a trap space structure, a conventional liquid-permeable filter can be omitted to thereby reduce the manufacturing costs. Also, since a filter-functioning unit is provided integrally in a needle connecting device, as compared with a prior art in which they are provided separately, the present invention is more advantageous in terms of productivity and manufacturing cost. Most of all, the present invention can overcome limitations in various kinds of injectable injections caused since an injection directly passes through a filter. Brief Description of the Drawings
[45] These and other aspects and features of the present invention will become apparent to those skilled in the art through the following description of a preferred embodiment given in conjunction with the accompanying drawings, in which:
[46] Fig. 1 is a perspective view showing a conventional medicine injection apparatus;
[47] Fig. 2 is a perspective view showing that an injection needle is coupled to a needle connecting device of the conventional medicine injection apparatus;
[48] Fig. 3 is a partially sectional view showing that the injection needle is coupled to the needle connecting device of the conventional medicine injection apparatus;
[49] Fig. 4 is a sectional view showing a filter unit of the conventional medicine injection apparatus;
[50] Fig. 5 is a transverse sectional view showing a needle connecting device of a medicine injection apparatus according to the present invention; and
[51] Fig. 6 is a longitudinal sectional view showing the needle connecting device of the medicine injection apparatus according to the present invention. Mode for the Invention
[52] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[53] Figs. 5 and 6 are a transverse sectional view and a longitudinal sectional view showing a needle connecting device of a medicine injection apparatus according to present invention.
[54] Prior to the explanation, it is noted that the same reference numeral is used to designate the same component as the prior art and the detailed descriptions thereon will be partially omitted.
[55] A needle connecting device 200, to which an injection needle 10 or catheter to be inserted into a patient is detachably coupled, is provided at a terminal end of an elongated extension tube 104 of a medicine injection apparatus 100. A cylindrical protruding boss 202 is integrally formed at a leading end of the needle connecting device 200 to protrude at its center, so that the protruding boss 202 is inserted into a body 12 of the injection needle 10 coupled thereto and a communication hole 202a through which an injection is supplied is formed at the center of the protruding boss 202.
[56] In addition, a cylindrical outer wall 204 is formed integrally with the protruding boss 202 so as to surround it and be spaced apart therefrom. A female thread 204a is formed on an inner side of the outer wall 204 so that an enlarged coupler 12b formed at a trailing end of the body 12 of the injection needle 10 to be coupled is screwed with the female thread 204a.
[57] In addition, a cylindrical handle 206 is integrally formed at the rear of the outer wall
204 to extend with the substantially same diameter, and the handle 206 mainly serves to give a grip to a user.
[58] According to the present invention, a filter-functioning unit 210 is integrally provided at the handle 206 of the needle connecting device 200.
[59] The filter- functioning unit 210 has a generally flat shape to be narrow in a vertical direction but wide in a horizontal direction. That is, filter receiving plates 212, which are respectively provided as upper and lower sides of the filter- functioning unit 210, are rounded to be gently convex, so that a predetermined space is defined in the filter- functioning unit 210 by the upper and lower filter receiving plates 212. Edge portions of the upper and lower filter receiving plates 212 are coupled to each other to be sealed.
[60] In addition, both ends of the upper and lower filter receiving plates 212 respectively converge and are coupled so that they internally communicate with a communication hole 206a of the handle 206.
[61] Here, for convenience of explanation, a side of the handle 206 into which an injection is firstly introduced with respect to the filter-functioning unit 210 is referred to as an inflow side of the handle 206, while a side of the handle 206 to which an injection having passed through the corresponding filter-functioning unit 210 is supplied thereafter is referred to as an outflow side of the handle 206.
[62] The filter- functioning unit 210 has an inflow hole 214 provided at an inner center of its one end in order to communicate with the communication hole 206a of the inflow side of the handle 206. The inflow hole 214 has a relatively smaller inner diameter than the communication hole 206a of the inflow side of the handle 206, so that an injection passing through the inflow hole 214 increases in its velocity and the injection in the inner space is also prevented from flowing backward.
[63] In addition, an inner protruding tube 218 is formed to extend in a horizontal direction in the inner space opposite to the inflow hole 214. An outflow opening 218b is formed in the inner protruding tube 218 to communicate with the communication hole 206a of the outflow side of the handle 206, and an outflow hole 218a is formed at the center of a leading end of the inner protruding tube 218 to communicate with the outflow opening 218b therein. The outflow hole 218a has a relatively smaller inner diameter than the outflow opening 218b, thereby preventing an injection from flowing backward from the outflow opening 218b and also maximally preventing foreign materials or air contained in the injection in the inner space from leaking.
[64] Furthermore, a conduction feature 218c having a general hat shape is integrally provided on an outer surface of the leading end of the inner protruding tube 218 so as to smoothly guide the injection, which is introduced from the inflow hole 214, to the right and left side of the inner space.
[65] In addition, a blocking protrusion 218d is integrally formed on outer surfaces of right and left sides of a middle portion of the inner protruding tube 218 to protrude vertically.
[66] Accordingly, the inner space is divided into right and left sides with the horizontal inner protruding tube 218 interposed therebetween, and each of the divided right and left sides of the inner space is also divided into front and rear sides by the vertical blocking protrusion 218d. As a result, the inner space at the rear side of the blocking protrusion 218d is a trap space 219 in which foreign materials contained in the injection are collected as described below. [67] In addition, a guide feature 216 is integrally formed on an inner side around the inflow hole 214 in a shape corresponding to the conduction feature 218c of the inner protruding tube 218 so as to smoothly guide the injection, which is introduced into the inner space through the corresponding inflow hole 214, to the right and left sides of the inner space. The guide feature 216 also prevents the injection in the right and left sides of the inner space from flowing back.
[68] Furthermore, a gas-permeable filter 213 is provided to be suitably fixed on an inner side of the filter receiving plate 212 of the filter- functioning unit 210, and at least one air discharging hole 212a is formed at a suitable position of the filter receiving plate 212, where the gas-permeable filter 213 is provided, so that the air discharging hole 212a communicates with the outside.
[69] Now, the operation of the needle connecting device of a medicine injection apparatus according to the present invention as configured above will be described below.
[70] When an injection is supplied from the medicine injection apparatus 100 along the extension tube 104 and reaches the needle connecting device 200 provided at the terminal end of the corresponding extension tube 104, the corresponding injection is introduced into the needle connecting device 200. First, the injection is introduced into the communication hole 206a in the inflow side of the handle 206 of the needle connecting device 200 and then passes through the inflow hole 214 of the filter- functioning unit 210 with increasing its velocity. Foreign materials and air contained in the injection, which is introduced into the rapidly- widened inner space of the filter- functioning unit 210 with the increased velocity, are moved to an outside of the inner space due to the difference of weight and specific gravity, while a portion of the injection free from foreign materials and air directly moves ahead due to the high velocity and is then discharged through the outflow hole 218a of the inner protruding tube 218. Meanwhile, the portion of the injection containing foreign materials and air, which has moved to an outside of the inner space, also moves to the right and left sides of the inner space after passing through between the conduction feature 218c at the leading end of the inner protruding tube 218 and the guide feature 216 corresponding thereto due to the high velocity, and then flows into the trap space 219 through the blocking protrusion 218d. The injection flows round in the closed trap space 219, and the contained foreign materials are collected in the trap space 219. In addition, the air contained in the injection moved to the right and left sides of the inner space firstly passes through the gas-permeable filter 213 and is then discharged out through the air discharging hole 212a to be removed.
[71] Of course, the injection in the right and left sides of the inner space will partially flow out through the outflow hole 218a of the inner protruding tube 218 to be supplied, with foreign materials and air removed, as an additional injection is supplied.
[72] In addition, the injection flowing out through the inside of the inner protruding tube
218 will be injected into the body of a patient through the injection needle 10 coupled to an end of the needle connecting device 200.
[73] As a result, it is possible to provide superior advantages as follows. A superior performance can be given in that foreign materials and air, which must not be injected into a patient, can be perfectly removed. In addition, since foreign materials are collected and removed through the structure of the trap space 219, the liquid- permeable filter 110b- 1 employed in the prior art can be omitted to thereby reduce the manufacturing costs. Also, since the filter-functioning unit 210 is provided integrally in the needle connecting device 200, as compared with the prior art in which they are provided separately, the present invention is more advantageous in terms of productivity and manufacturing cost. Most of all, the present invention can overcome limitations in various kinds of injectable injections caused since an injection directly passes through the filters 11 Ob-I and 110b-2.
[74] Moreover, the filter- functioning unit 210 according to the present invention is an improvement as compared with the conventional filter unit 110 even individually. Although it has been illustrated that the corresponding filter-functioning unit 210 is integrally provided in the needle connecting device 200, the corresponding filter- functioning unit 210 can be provided as a separate part and in such a case, the filter- functioning unit 210 can also be provided in the middle of the extension tube 104.
[75] The above descriptions are to merely illustrate a preferred embodiment of the present invention. It should be understood that those skilled in the art can make various modifications and changes thereto without departing from the purport of the present invention.

Claims

Claims
[1] A needle connecting device of a medicine injection apparatus, the needle connecting device being provided at a terminal end of an extension tube for allowing an injection to be supplied therethrough, the needle connecting device including a leading end to which an injection needle is detachably coupled and a trailing end with a handle integrally formed to extend, the needle connecting device comprising: a filter- functioning unit integrally provided at the handle to remove a foreign material and air contained in the supplied injection.
[2] The needle connecting device as claimed in claim 1, the filter- functioning unit comprises: a filter receiving plate provided to define an outside of the filter-functioning unit and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the handle; an inflow hole provided in one end of the filter-functioning unit to communicate with a communication hole in an inflow side of the handle; an inner protruding tube extending in a horizontal direction in the filter- functioning unit opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with a communication hole of an outflow side of the handle and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
[3] The needle connecting device as claimed in claim 2, wherein the filter- functioning unit further includes a gas-permeable filter fixedly provided on an inner side of the filter receiving plate.
[4] The needle connecting device as claimed in claim 3, wherein at least one air discharging hole is provided in the filter receiving plate at the position where the gas-permeable filter is provided.
[5] The needle connecting device as claimed in claim 2, wherein the inflow and outflow holes have a relatively smaller inner diameter than the communication hole of the handle.
[6] The needle connecting device as claimed in claim 2, further comprising a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space.
[7] The needle connecting device as claimed in claim 6, further comprising a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
[8] A filter device connected to a liquid medicine supply line to remove a foreign material and air contained in liquid medicine, comprising: a filter receiving plate provided to define an outside of the filter device and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the liquid medicine supply line; an inflow hole provided in one end of the filter device to communicate with an inflow side of the liquid medicine supply line; an inner protruding tube extending in a horizontal direction in the filter device opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with an outflow side of the liquid medicine supply line and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion.
[9] The filter device as claimed in claim 8, further comprising a gas-permeable filter fixedly provided on an inner side of the filter receiving plate.
[10] The filter device as claimed in claim 9, wherein at least one air discharging hole is provided in the filter receiving plate at the position where the gas-permeable filter is provided.
[11] The filter device as claimed in claim 8, wherein the inflow and outflow holes have a relatively smaller inner diameter than the liquid medicine supply line and the outflow opening.
[12] The filter device as claimed in claim 8, further comprising a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space.
[13] The filter device as claimed in claim 12, further comprising a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
[14] A medicine injection apparatus including a filter device connected to a liquid medicine supply line to remove a foreign material and air contained in liquid medicine, the filter device comprises: a filter receiving plate provided to define an outside of the filter device and to define an inner space therein, both ends of the filter receiving plate being coupled to internally communicate with the liquid medicine supply line; an inflow hole provided in one end of the filter device to communicate with an inflow side of the liquid medicine supply line; an inner protruding tube extending in a horizontal direction in the filter device opposite to the inflow hole, the inner protruding tube having an outflow opening formed therein to communicate with an outflow side of the liquid medicine supply line and an outflow hole formed at the center of a leading end thereof to communicate with the outflow opening; a blocking protrusion provided to vertically protrude from an outer surface of a middle portion of the inner protruding tube; and a trap space formed as an inner space at the rear of the blocking protrusion. [15] The medicine injection apparatus as claimed in claim 14, wherein the filter device further comprises a gas-permeable filter fixedly provided on an inner side of the filter receiving plate. [16] The medicine injection apparatus as claimed in claim 15, wherein at least one air discharging hole is provided in the filter receiving plate at the position where the gas-permeable filter is provided. [17] The medicine injection apparatus as claimed in claim 14, wherein the inflow and outflow holes have a relatively smaller inner diameter than the liquid medicine supply line and the outflow opening. [18] The medicine injection apparatus as claimed in claim 14, wherein the filter device further comprises a conduction feature integrally formed on an outer surface of the leading end of the inner protruding tube to guide the injection introduced from the inflow hole to an outside of the inner space. [19] The medicine injection apparatus as claimed in claim 18, wherein the filter device further comprises a guide feature formed on an inner side around the inflow hole in correspondence with the conduction feature to guide the injection to the outside of the inner space.
PCT/KR2007/001752 2006-04-12 2007-04-11 Needle connecting device, filter device and medicine injection apparatus comprising the filter device WO2007117119A1 (en)

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KR101551400B1 (en) * 2013-06-25 2015-09-09 주식회사 지엠엠씨 Syringe having dual micro filters
KR101369594B1 (en) * 2013-11-20 2014-03-04 박승일 Synthetic resins airing cap for syringe
WO2016006893A1 (en) * 2014-07-08 2016-01-14 (주)세인메덱스 Syringe having stick injury prevention function
KR101710830B1 (en) * 2016-03-28 2017-02-27 유광석 Filter cap for syringe
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CN114288488B (en) * 2020-10-08 2024-02-20 秀逸开发株式会社 Medicine infusion set

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