KR102053405B1 - Assembled filter for syringe, syringe and assembled ringer comprising thereof - Google Patents

Abstract

The present invention collects the foreign substances mixed with the chemical liquid in the process of inhaling the chemical solution of the ampoule in the syringe, and when the chemical liquid in the syringe is administered to the human body while blocking the flow of the collected foreign substances so that only the injection of the chemical liquid can be made The present invention relates to a filter assembly for a syringe, and a syringe and a ringer assembly including the same, including a needle holder for fixing a needle to a front end portion and a neck portion of a cylinder fitted to a rear end portion, and a front end of the needle holder and the neck portion. In the filter assembly for syringes comprising a filter unit interposed between the sections, the filter unit is a tubular shape in the center to form a hollow penetrating in the forward and rearward direction, the side that protrudes outwards along the outer circumference Close to the inner circumference of the needle holder in the front and rear directions between the hollow and the outer edge A support member consisting of a close contact portion having a through hole therethrough and a front and rear extension tube extending forward and backward from the front and rear surfaces of the inner hollow periphery of the close contact portion, respectively; Hemispherical shape is provided convex forward to cover the front extension tube, the rear opening is fitted to form an incision line in the center of the front end portion, and extends outward from the rear end of the extension portion to cover the through hole A valve member consisting of a skirt portion forming a shape; And a filter in which a front opening is coupled to a bag shape to surround a side wall of the rear extension tube.

Description

Filter assembly for syringe and Syringe and ringer assembly including the same {ASSEMBLED FILTER FOR SYRINGE, SYRINGE AND ASSEMBLED RINGER COMPRISING THEREOF}

The present invention relates to a filter assembly for a syringe, and specifically, to collect foreign substances mixed with the chemical liquid in the process of inhaling the chemical liquid of the ampoule in the syringe, and to collect the flow of the foreign substances collected when the chemical liquid in the syringe is administered to the human body. The present invention relates to a filter assembly for a syringe, and a syringe and a ringer assembly including the same, to allow injection of only a chemical solution.

In general, the syringe is configured to suck or discharge the chemical liquid by the reciprocating motion of the piston with respect to the cylinder, and the needle holder for fixing the injection needle is attached to the neck portion of the cylinder in which the suction and discharge of the chemical liquid to the cylinder is made. .

The above-mentioned chemical liquid is a liquid or powder mixed liquid or liquid, which is mainly contained in an ampoule of glass or plastic material, and stored.In use, the neck portion of the ampoule is cut and opened, and then a needle is placed to inhale the chemical liquid into the cylinder. In the case where the opening of the ampoule is sealed with synthetic rubber, the synthetic rubber is inserted through a needle and placed in the ampoule, and the chemical liquid is sucked into the cylinder.

In this case, foreign substances, such as glass or plastic fragments, synthetic rubber fragments, and the like may be mixed together in the chemical solution introduced into the syringe, and the foreign substances mixed in the syringe may be injected together with the chemical liquid in the human body.

As such, foreign substances injected into the human body may move along the blood vessels of the human body and may damage not only the blood vessel inner wall but also the organs of the human body.

In order to solve this problem, there have been many studies and efforts, and as an example of the efforts, Korean Patent No. 10-1245378 (registered on March 19, 2013; hereafter referred to as 'Patent Document 1') and US Patent No. US4332249 (1982.06 .01. Registration (hereinafter referred to as "Patent Document 2").

Patent Documents 1 and 2 described above use a structure of a check valve to allow inflow of foreign substances in the process of inhaling the chemical liquid in the syringe, and to filter the chemical liquid in the discharge process.

However, the filter assemblies of Patent Literatures 1 and 2 are configured to be installed inside the needle holder adjacent to the needle, and the installation portion is a portion having an inner diameter between the needle and the end of the cylinder neck portion of less than about 3.8 to 4 mm.

With reference to the accompanying drawings with respect to such an installation site and its effect will be described in more detail.

First, referring to Patent Document 1 shown in FIG. 1 and FIG. 2, the inlet port is formed on the outside and the filter structure 10 is formed in the center to form the outlet port. It can be seen that the opening in the other direction.

Here, the structure of the outlet check valve is composed of a shielding film 12 which protrudes in a hemispherical shape toward the injection needle and forms an incision line so as to be opened in a hole at the center thereof.

In addition, the shielding film 12 is made of a material having flexibility in order to have a function of a check valve in response to pressure acting from inside the cylinder.

That is, the shielding film 12 has a hemispherical shape corresponding to the injection needle N, but is a flexible material, and is formed very thin so as to have a function of a check valve in a central part of a narrow space within 3.8 to 4 mm. It must be.

Accordingly, the central region d1 occupied by the shielding film 12 is forced to directly receive the pressure of the chemical liquid flowing through the injection needle N as shown in FIG. 1.

In addition, in the edge region d2 supporting the cylindrical body 14 and forming the suction port, as shown in FIG. 2, a space Δd1 × Δd xn between the plurality of pillars 16 may be narrowly formed. In addition, since it is in the state covered by the rim membrane 24, the pressure of the chemical liquid sucked through the injection needle N is inevitably smaller than that of the central region d1 (d1> d2).

That is, the pressure of the chemical liquid flowing in the process of inhaling the chemical liquid in the cylinder can only be concentrated on the screening film 12.

In this way, the shielding film 12 subjected to pressure concentration is not possible at a thickness of 0.1 to 0.3 when the incision line 18 is referred to in the needle holder 22 within 3.8 to 4 mm. As described above, the hemispherical shape of the shielding film 12 including the cutting line 18 may be deformed in the opposite direction or the cutting line 18 may be opened by the pressure described above, and the gap between the shielding film 12 and the filter 20 may be widened. Foreign substances may be mixed with the chemical solution and collected.

As such, foreign matters collected between the shielding film 12 and the filter 20 may be mixed with the chemical liquid and discharged again during the administration of the chemical liquid, which may cause a problem due to injection into the human body.

In addition, in order to prevent the above-mentioned problem, when the part of the shielding film 12 is formed thick, the incision 18 is difficult to open when the chemical liquid is administered.

Therefore, according to Patent Document 1, since the flow of the chemical liquid is limited through the incision line 18, there is a problem such as not only needing more than the pressure through the piston, but also unnecessarily increasing the time required for receiving and administering the chemical liquid. There may be.

In addition, although the filter structure 10 is described as being secured to the inner wall or the pillar portion 16 of the needle holder 22 by interference fit, the cylindrical body 14 is a interference fit (12) and the membrane ( It is obvious that the material is a flexible material including 24), and this is the risk of release of the fixed installation state under the pressure of the chemical liquid flowing into the cylinder during the above-mentioned suction process and the space between the plurality of pillar portions 16 described above (Δd1 x Δd xn). There is also the problem of narrowing).

And, the filter 20 of the patent document 1 is a coupling of the type sandwiched from the rear of the cylindrical body 14 to the inside, which of course secures the area inside the cylindrical body 14 of a flexible material including the filter 20 There is a problem that is difficult to combine.

On the other hand, in patent document 2, the valve member 30 shown in FIG. 3 and FIG. 4 protrudes in the cylinder inner direction to the center part, and forms the suction part 34 which formed the slit 32 in the center, and an outer side. The skirt-shaped discharge part 36 is formed in the site | part.

In addition, the discharge part 36 inside the cylinder is provided with a filter 38 formed through the portion corresponding to the central portion of the valve member 30.

The suction part 34 and the discharge part 36 according to the center portion and the skirt described above are opened in opposite directions to correspond to the pressure acting on the inside of the cylinder.

When the suction of the chemical liquid is made from this configuration, the slit 32 of the central suction part 34 is opened to mix the chemical liquid and the foreign matter in the cylinder, and at this time, the skirt (the discharge part 36) is the filter 38. It is supported by the contact with the inner wall of the needle holder 40, it is to block the contact of foreign matter on the filter 38 surface.

In addition, in the process of administering the chemical liquid in the cylinder to the human body, the slit 32 of the central portion is closed, and the foreign matter through the filter 38 in the process of allowing the skirt portion for the filter 38 to be discharged through the passage formed while opening. Allow filtering of

However, as described above, according to the technical configuration of Patent Document 2, the slit 32 is opened in the above-described suction process is based on the mixing of the foreign matter with the chemical solution, the foreign matter between the slits 32 Can remain stuck.

In addition, the skirt (discharge part 36), as shown in Figs. 3 and 4, its mounting position is determined by the support 42, but the filter 38 for supporting the rear portion with its flexibility. Due to the flexibility of the outer end of the skirt (discharge part 36) in the suction process is difficult to contact the inner wall surface of the needle holder (40).

Accordingly, the skirt (discharge part 36) is the outer end of the skirt (discharge part 36) during the suction process, as shown by the dotted line in FIG. And foreign matter may be caught between the inner wall surface of the needle holder 40.

In this way, foreign matters placed between the slits 32 or between the skirt and the inner wall surface of the needle holder 40 may be injected into the human body along with the chemical liquid during the discharge process.

In addition, the filter 38 penetrates through the central region d1 ′, and has a configuration in which filtering is performed on an outer region of the central region d1 ′, that is, an edge region d2 ′.

In the discharge process for administering the chemical liquid by such a filter 38, in consideration of the resistance of the filter 38 to the flow of the chemical liquid, the central region d1 'is relatively larger than the outer edge region d2'. More pressure is applied, which has a concern that the shape of the suction part 34 is deformed in the opposite direction as in the case of Patent Literature 1 and the problem thereof.

Republic of Korea Patent No. 10-1245378 (registered on March 19, 2013) US registered patent US4332249 (registered June 1, 1982)

The present invention has been made in order to solve the above-mentioned conventional problems, an object of the present invention is to filter and collect the foreign matter mixed in the process of inhaling the drug solution into the cylinder of the syringe, in the process of administering the drug solution to the human body Syringe filter assembly that can prevent the foreign substances collected into the human body, facilitate assembly and installation, and stabilize the installation structure to increase the reliability of the filtering of foreign substances, and includes the same To provide a syringe and a ringer assembly.

In addition, another object of the present invention, the inhalation of the drug solution into the cylinder of the syringe and to facilitate the flow of the drug solution during the administration of the drug solution to the human body, as well as to inject the drug solution into the human body with a small force It is.

A characteristic configuration of the filter assembly for a syringe according to the present invention for achieving the above object is a needle holder for fixing the needle to the front end portion and the neck portion of the cylinder is fitted to the rear end, and between the needle holder and the front end of the neck portion In the filter assembly for syringes comprising a filter unit interposed therebetween, the filter unit is formed in a tubular shape in the center penetrates forward and backward in the center, and the side that protrudes outward along the outer circumference A close contact portion formed along the inner circumference of the needle holder and having a through hole penetrating forward and backward between the hollow and outer edges, and extending forward and backward from the front and rear surfaces of the inner hollow periphery of the close contact portion, respectively. A support member consisting of front and rear extension tubes; Hemispherical shape is provided convex forward to cover the front extension tube, the rear opening is fitted to form an incision line in the center of the front end portion, and extends outward from the rear end of the extension portion to cover the through hole A valve member consisting of a skirt portion forming a shape; And a filter in which a front opening is coupled in a shape to surround a side wall of the rear extension tube in a bag shape.

Here, the inner wall of the needle holder is formed with at least a first locking projection of the first locking projection corresponding to the front edge of the contact portion of the position already set, and a second locking projection corresponding to the rear edge of the adhesion portion of the position already set. The skirt portion is located below the inner diameter of the first locking projection in the installation state, characterized in that the outside of the outer line of the through hole.

In addition, the needle holder forms an inclined angle of the inner surface is extended toward the rear, the contact portion is characterized in that the outer surface is in close contact with the inner surface of the needle holder corresponding to the inclined angle narrowing toward the upper.

In addition, the skirt is characterized in that the thickness is formed in a shape that becomes thinner toward the outer edge from the rear opening of the valve member.

In addition, the support member has a guide step extending outward so as to be connected to the inner rear of the through-hole of the close contact portion at the front end of the rear extension tube to guide the coupling of the filter.

Furthermore, the rear end further comprises a dome-shaped cover part covering the outside of the rear end of the rear extension tube, and further comprising a cover member having a cover leg which extends forward and consists of two or more numbers spaced around the front end of the cover part. The cover member is moved backward in the filter by the flow pressure of the chemical liquid sucked in the cylinder direction through the rear extension tube in the suction process to induce the flow of the chemical liquid between the cover legs, the administration In the process of moving forward in response to the flow of the chemical liquid in the direction of the needle, characterized in that to guide the flow of the chemical liquid in the direction of the through hole covering the rear end of the rear extension tube.

According to the above-described configuration of the present invention, the chemical liquid and the foreign matter mixed into the cylinder of the syringe must pass through the filter through the incision formed on the extension of the valve member and the extension and at the same time separate collection of the foreign matter by the filter As a result, in the process of administering the drug solution to the human body, the collected foreign matter is not affected by the flow of the drug solution, as well as isolated in the collected state, there is an effect that can increase the efficiency of preventing the injection of foreign substances to the human body.

In addition, it is easy to assemble the filter unit and install it on the inner wall of the needle holder through a rigid tubular support member, and the support member corresponding to the inner wall of the needle holder has no structural deformation compared to the installation pressure. As equipped with, there is also an effect that can increase the reliability of the installation and the filtering of the foreign matter accordingly.

In addition, in the process of inhaling the chemical liquid into the cylinder of the syringe, it is concentrated in the filter while reducing the resistance of the mixed chemical liquid and foreign matter flow, and also in the process of administering the chemical liquid to reduce the resistance to the flow of the chemical liquid without excessive force In addition to facilitating the use of the syringe, there is also an effect that prevents the increase in time.

1 and 2 are cross-sectional views for explaining the technical configuration of the prior art patent document 1 and its working relationship.
3 and 4 are cross-sectional views for explaining the technical configuration of the prior art patent document 2 and the resulting operational relationship.
Figure 5 is an exploded perspective view for explaining the configuration of the filter assembly for the syringe according to an embodiment of the present invention and the coupling relationship of these configurations.
6A to 6C are cross-sectional views for explaining the configuration of the filter assembly for the syringe of FIG.
7 is an exploded perspective view showing the configuration of a syringe with a filter assembly of FIG.
FIG. 8 is a schematic perspective view of a ringer assembly with the filter assembly of FIG. 5. FIG.

In describing the present invention, the expression of the front (front and front) shall refer to the direction in which the injection needle is placed or a part in the direction in the technical configuration of the entire assembled state, and the rear (rear, rear) is the injection. It will be described as referring to the direction in which the cylinder (ringer connector) at the tip of the needle or in the direction.

In addition, in description of this invention, inside expression shall refer to the inside direction divided by each structure or each structure, or the site | part in that direction, and the outside expression may be in the opposite direction or the direction to the inside expression. It will be described as referring to the site.

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

The present invention collects the foreign substances mixed with the chemical liquid in the process of inhaling the chemical solution of the ampoule in the syringe, and when the chemical liquid in the syringe is administered to the human body while blocking the flow of the collected foreign substances so that only the injection of the chemical liquid can be made A filter assembly for a syringe, and a syringe and a ringer assembly including the same.

In the configuration of the present invention for this purpose, as shown in Figs. 5 to 6C, the needle N is fixed to the front end portion, and the neck portion 82a of the cylinder 82 is fitted through the opened rear end portion. It consists of the structure provided with the needle holder 50 by which it is made to install, and the filter unit 80 interposed between the needle holder 50 and the front end part of the neck part 82a of the cylinder 82.

In the present invention, the needle holder 50 described above, the first locking projection (52a) to the rear inner wall of the interval already set from the position where the needle (N) is fixed, as confirmed in Figure 6a to 6c ) Or a stepped portion (not shown) is formed.

The first locking projection 52a or step is for limiting the forward installation position of the filter unit 80 including the supporting member 60 to be described later, which is also the skirt portion 62 forming the valve member 68 to be described later. In order to secure the operating space of the), it will be described in more detail in the description of the installation relationship between the needle holder 50 and the support member 60 and the working relationship of each configuration including the same, but is not necessarily a configuration.

In addition, a second locking protrusion 52b may be formed on the inner wall of the needle holder 50 with a space between the first locking protrusion 52a and the back portion (thickness of the contact portion 54 of the supporting member 60 to be described later). have.

In addition, the needle holder 50 is preferably made of a synthetic resin material, wherein the inner diameter of the needle holder 50 (the interval passing through the center of the cross section when the cross-sectional shape is polygonal) is expanded toward the rear from the front position. The angle of inclination corresponds to the tapered shape of the cylinder neck portion 82a of the general syringe, and the inclination angle is in a range of so-called drainage to facilitate extraction in the injection molding process of the needle holder 50. desirable.

Here, the shape of the first locking projection (52a) or the stepped and the second locking projection (52b) may be formed to protrude in an annular shape along the circumference at the inner wall position of the needle holder 50 already set, respectively. .

The first locking protrusion 52a or the stepped jaw and the second locking protrusion 52b are spaced along the inner wall circumference of the needle holder 50 in the shape of the pillar portion 16 of Patent Document 1 in the prior art description. It may be formed in a plurality of numbers.

However, the supporting member 60 to be described later is the first locking projection 52a or the rear of the first locking projection 52a or the stepped state in the state of being inserted into the front inwardly formed by the stepped portion 16 of the pillar portion 16 of Patent Document 1. It extends over the edge part and over the front part of the 2nd locking projection 52b, and is for maintaining the installation state firmly.

In addition, the above-described first locking projection 52a and the second locking projection 52b may be formed of a so-called undercut (protruding inwardly), which can be forcibly extracted in the process of injection molding the needle holder 50. .

In addition, the filter unit 80 is installed in the needle holder 50, as shown in Figure 5, has a hollow hollow (M / H) and the through hole 56 of the edge to the needle holder 50 Correspondingly, the support member 60 to receive the support of the installation, and the opening is formed at the rear to correspond to the front portion of the support member 60 and the hollow (M / H) portion of the support member 60, It comprises a valve member 68 having a cut line 66 at the front end in a convex hemispherical shape toward the front end and a filter 70 formed in a shape surrounding the outer end of the rear end of the support member 60 in a bag shape.

Among the components constituting the filter unit 80, the above-described support member 60 has a rigid tubular shape and forms a hollow (M / H) penetrating in the front and rear directions at the central portion, and the hollow (M / H) has a thickness in the front and rear directions with respect to the longitudinal center of the longitudinal direction and extends outwards along the outer circumference, and the needle holders of the positions where the sides of the protruding parts are already set ( 50) it has a close contact portion 54, which is tightly coupled along the inner circumference.

The support member 60 forms front and rear extension tubes 58a and 58b extending forward and backward, respectively, from the front and rear surfaces of the hollow periphery inside the close contact portion 54 described above.

In addition, one or more through-holes 56 penetrating in the front-rear direction are formed between the hollow M / H and the outer periphery of the close contact part 54 mentioned above.

Here, the outer line of the through hole 56 on the basis of the center of the hollow (M / H) is the first engaging projection (52a) or stepped in the above-described installation position at the center of the hollow (M / H) The inner line of the through hole 56 is positioned at a position that is less than the interval crossing the reference, and the outer line of the front and rear extension pipes 58a and 58b is more than enough to secure the thickness necessary for maintaining the shape of the hollow (M / H). It is desirable to design so that.

The through-holes 56 described above are preferably formed in two or more numbers along the circumferential direction around the hollow (M / H), and in this case, neighboring each other in the circumferential direction around the hollow (M / H) Between the through-holes 56, the edge portion of the contact portion 54 is a rim (rim), it is preferable to form a spoke (spoke) shape of the periphery of the hollow (M / H) boss (boss) .

Then, the outer surface of the close contact portion 54 described above, as shown in Figs. 5 to 6C, the needle holder 50 so as to be in close contact with the inner wall surface of the needle holder 50 of the already set position It is preferable to form in a tapered shape having an angle of the same to the same range as the angle formed by the inner wall surface of the.

In addition, the support member 60 is provided with a guide step (G) protruding outward so as to be connected to the inner rear of the through-hole 56 of the contact portion 54 at the front end of the rear extension pipe (58b) filter to be described later Guide the combination of 70.

At this time, it is preferable that the outer line of the front end portion of the filter 70 coupled to the guide step G is not designed to exceed the inner line of the through hole 56 described above, which is a through hole during the administration of the chemical solution. This is to facilitate the flow of the chemical liquid passing through the (56).

As described above, since the support member 60 is made of a hard material, it is easy to assemble the valve member 68, the cover member 76, and the filter 70 to be described later, as well as the needle holder 50 described above. Since the support member 60 corresponding to the inner wall of the structure has a durability that does not have structural deformation compared to the installation pressure, it is possible to increase the stability of the installation and the reliability of the filtering of the foreign material accordingly.

On the other hand, the above-described valve member 68 of the configuration constituting the filter unit 80 is made of a material of silicone or soft synthetic rubber having a soft, hemispherical shape is provided convexly toward the front to cover the front extension pipe (58a). The rear opening is inserted into the front extension tube 58a from front to rear so as to protrude outward from the periphery of the extension portion 64 and the rear end rear opening of the extension portion 64 so that the support member 60 can The skirt portion 62 is formed to cover at least the through hole 56 of the front surface.

At this time, the position of the outer edge of the skirt portion 62 described above, in the state in which the valve member 68 is assembled with the support member 60, the inner side of the first engaging projection 52a or the inner surface of the step not contacted It is preferable to design so that it exceeds the outer line of the through-hole 56 described above.

In addition, the inner diameter of the protruding portion in the above-described extension portion 64 has the same size as the outer diameter of the front extension tube 58a to maintain the firmness of the coupling, and thus the inner surface of the extension portion 64 and the front extension tube 58a. It is preferable to block the occurrence of a gap between the outer peripheral surface of the.

In addition, the front end of the extension part 64 has the shape blocked by the dome shape or the end shape of a flat-blade screw driver from an external viewpoint, and penetrates to the center part of the front end of the extension part 64 in the front-rear direction. As a result, the incision 66 is formed so that it can be opened as pressure from the front is added to both sides of the penetrating.

In addition, the skirt 62 is formed in a shape corresponding to the front surface of the support member 60, when pressure from the front is added, it is firmly adhered to the front surface of the support member 60 to block the shape deformation.

This is for the shape of the skirt 62 to be freely deformed in the front, and to be supported in a state in which it is difficult to deform the back, that is, in a state of being in close contact with the support member 60.

In this way, the skirt 62 is in contact with the support member 60 in a supported state so that the flow of the chemical liquid flowing through the needle N is concentrated to the central portion of the extension 64. At the same time as the pressure portion according to the extension portion 64 to facilitate the opening to the incision line 66.

At this time, the inner diameter of the front extension pipe (58a) and the inner diameter of the extension portion 64 and the incision line (66) is preferably designed so that the degree of opening by the flow pressure of the incoming chemical liquid is more than the inner diameter of the needle (N). .

In addition, the filter 70 of the configuration constituting the filter unit 80 is made of a fiber material to form a bag shape having an opening in the front.

The installation of the filter 70 is such that the front end of the opening of the filter 70 is supported by the support member in a state in which the rear end of the rear extension pipe 58b is inserted into the filter 70 through the opening of the filter 70 according to the bag shape. It consists of engaging in the shape surrounding the front part side wall of the rear extension pipe 58b which adjoins the close contact part 54 of 60.

That is, the filter 70 is preferably coupled to the guide step G located on the side wall of the front portion of the rear extension pipe 58b.

Coupling of the above-described filter 70 may be made by fusion using heat or bonding using hot melt or the like corresponding to the guide step G described above, wherein the material used as the adhesive is chemical The reaction is, of course, preferably selected to be harmless to the human body.

The filter 70 provided in this way has already been set with respect to the rear end of the support member 60 described above when the distance from the opening to the inner rear end portion, that is, when the depth of the filter 70 is based on the engagement position. It is desirable to design such that the above is maintained.

At this time, the interval from the rear end of the support member 60 to the inner rear end of the filter 70 is such that it is in a range that allows to secure a space for collecting foreign substances mixed with at least the chemical liquid.

In addition, the depth of the filter 70 includes a condition for securing a space for collecting foreign substances mixed with the chemical liquid, and as described later, the cover member 76 may be additionally provided. It is to secure the moving range.

On the other hand, the filter unit 80 is the rear end of the support member 60, that is, the above-described according to the movement of the forward and backward positions between the rear end of the support member 60 and the inner rear end of the filter 70 described above. The cover member 76 may further include a cover member 76 having a dome-shaped cover portion 72 to cover the rear extension tube 58b.

The cover member 76 has a dome-shaped cover portion 72 in which the rear end portion covers the outside of the rear end portion of the support member 60, and two or more numbers spaced along the periphery of the front end portion of the cover portion 72. It consists of a configuration including a cover leg 74 protruding forward.

The cover member 76 is moved to the rear end in the filter 70 by the flow pressure of the chemical liquid flowing through the rear extension tube 58b in the process of sucking the chemical liquid in the cylinder 82 direction, the cover member The front end of the cover portion 72 retreats to the rear end side position of the rear extension tube 58b, and the chemical liquid flowing through the opening of the rear extension tube 58b passes through the cover legs 74 between the cylinders 82. To flow).

On the other hand, during the administration of the chemical liquid, the cover member 76 is advanced by the flow pressure of the chemical liquid through the neck portion 82a of the cylinder 82, the cover portion 72 is the cover leg 74 is the rear extension tube 58b By covering the outer side of the corresponding rear extension tube 58b as guided by), the flow pressure of the chemical liquid discharged from the inside of the cylinder 82 can be concentrated in the through hole 56.

At this time, the front end of the cover leg 74 of the cover member 76 which is advanced by the flow pressure of the chemical liquid is in close contact with the rear end of the guide step (G) described above, so that the guide step (G) of the cover member 76 is advanced It serves as a stopper to prevent deformation of the cover member 76 according to the flow pressure of the chemical liquid.

Hereinafter, with respect to the filter assembly for a syringe according to the present invention described above will be described with respect to the installation relationship and the resulting relationship.

First, the filter unit 80 is installed by pushing the filter unit 80 to a pressure higher than the pressure previously set through the rear opening of the needle holder 50 in the state fixed to the jig.

In this case, the close contact portion 54 of the support member 60 constituting the filter unit 80 is manufactured in a shape corresponding to close contact with the inclined inner surface of the needle holder 50 already set at the side surface thereof. Installation may be made in such a way that it is sandwiched by an interference fit without forming a first catching protrusion 52a or a step.

Even in this case, the first locking projection 52a or the stepped jaw secures the installation position of the support member 60, that is, the operating space in which the skirt 62 of the valve member 68 can be bent forward. It can be formed from.

In addition, the second locking protrusion 52b may further be formed to support the rear edge of the contact portion 54 regardless of whether the first locking protrusion 52a or the step is formed. In this case, the second locking protrusion 52b may be formed. ) May be used for the purpose of preventing the possibility of retreat so that the front edge portion of the contact portion 54 is pressed against the inner surface of the first locking projection 52a or the stepped or needle holder 50.

When the filter unit 80 is installed on the needle holder 50, the neck portion 82a of the cylinder 82 or the ringer connector 94 of the ringer assembly is opened through the rear opening of the needle holder 50. Assembly is completed by inserting.

As an example, a syringe is shown as an example of the relation of the filter unit in the assembled state. After inserting the needle N in a conventional manner into an open ampoule (not shown), the piston 84 is retracted. The chemical liquid is sucked into the cylinder 82.

At this time, the chemical liquid and foreign matter mixed through the injection needle (N), as shown in Figures 6a and 6b, in the state in which the through-hole 56 is blocked by the skirt portion 62 of the valve member 68 It concentrates to the center part of the extension part 64 by this.

As a result of the pressure, the incision line 66 formed at the front end of the extension portion 64 of the valve member 68 is opened and passes the mixed chemical liquid and foreign matter.

The flow of the entrained chemical liquid and foreign matter pushes back the cover member 76, and passes through the filter 70 through the cover leg 74 of the cover member 76, the foreign matter in the process is the filter 70 ) Is filtered and collected inside thereof, and the chemical liquid passed through is induced by a negative pressure continuously acting from inside the cylinder 82 and flows into the cylinder 82.

When the filling of the chemical liquid is completed in the cylinder 82 by the progress of the above process, that is, when the negative pressure action as the retraction of the piston 84 stops, the extension portion 64 of the valve member 68 described above. Shear is naturally restored to shape with the incision 66 closed.

At this time, the inside of the needle holder 50 is filled with a chemical solution, and foreign substances filtered by the filter 70 exist in an isolated state between the side of the rear extension tube 58b and the inside of the filter 70. In addition, the chemical liquid contained in the cylinder 82 is present as a pure chemical liquid with foreign substances filtered out.

Then, in the process of administering the chemical liquid according to the advance of the piston 84 to the cylinder 82, as shown in Figures 6a and 6c, the cover member 76 facing the neck portion 82a of the cylinder 82 ) Advances under the influence of the flow pressure of the chemical liquid according to the positive pressure in the cylinder 82, wherein the cover portion 72 of the cover member 76 covers the rear end portion of the corresponding rear extension tube 58b to flow the chemical liquid. The pressure is blocked at the front end of the extension 64.

Accordingly, the positive pressure started from the inside of the cylinder 82 is combed to the edge side under the influence of the cover member 76 at the narrow central portion where the rear end of the filter 70 is located, and in addition, of the chemical liquid passing through the edge portion. The flow is concentrated in the direction of the through hole 56 under the influence of the inclination of the inner surface of the needle holder 50.

Subsequently, the flow pressure of the chemical liquid passing through the through hole 56 passes through the skirt portion 62 covering the front circumference of the through hole 56 while being forwardly administered to the human body through the needle N. Has

Here, as described above, the cover member 76 in the process of administering the chemical liquid performs a function to block the flow pressure of the chemical liquid to the front end of the extension portion 64 of the valve member 68, but is not necessarily a configuration.

This is because the inner area of the needle holder 50 extends backward, so that the center portion occupied by the front extension tube 58a to which the extension 64 of the valve member 68 is fitted is compared with the outer edge portion thereof. As it is narrow, the flow pressure due to the discharge of the chemical liquid is relatively small compared with the prior art.

The central portion corresponding to the rear end of the rear extension tube 58b is primarily blocked by the filter 70 with respect to the flow pressure of the chemical liquid, and the inner side of the filter 70 blocks the rear end of the rear extension tube 58b. This is because the shape holding ability of the filter 70 is further added as it is placed in the shape to cover.

The drug solution administered from this will be collected by collecting the foreign matter mixed with the drug solution from the ampoule, and then discharged.

On the other hand, the syringe including the filter assembly for a syringe according to the present invention, as shown in Figure 7, a cylinder formed in the front end of the cylinder neck portion 82a of a single tube shape, and formed a space for accommodating the chemical liquid ( 82 and a piston 84 which is inserted through the rear opening of the cylinder 82 and is movable forward and backward in the longitudinal direction, and provides a flow pressure of the chemical liquid to the inside of the cylinder 82 according to the movement thereof. It consists of a configuration including a filter assembly for a syringe made of a combination of the needle holder 50 and the filter unit 80.

In addition, the ringer assembly including the filter assembly for a syringe according to the present invention, as shown in Figure 8, Ringer main body 90 for receiving the Ringer's solution, and Ringer's pipe constituting the ringer fluid flow path in the Ringer body 90 (92), a ringer connecting pipe (94) coupled to the ringer pipe (92) to discharge Ringer's fluid, and a filter assembly for a syringe composed of a combination of the needle holder (50) and the filter unit (80) described above. Is done.

As a result, the filter assembly for the syringe applied to the syringe or the ringer assembly according to the present invention is passed through the filter through the incision formed in the extension of the valve member and the foreign matter and the foreign matter mixed into the cylinder of the syringe and At the same time, the separation and collection of foreign substances by the filter is carried out, and in the process of administering the chemical liquid to the human body, the collected foreign substances are not affected by the flow of the chemical liquid and are sequestered in the collected state, thereby preventing the injection of foreign substances into the human body. It is easy to assemble the filter unit and install it on the inner wall of the needle holder through the rigid tubular support member, and the support member corresponding to the inner wall of the needle holder has no structural deformation compared to the installation pressure. As a result of the durability of the It can increase the fastness, concentrate the filter while reducing the resistance of the mixed liquid and foreign substance flow in the process of inhaling the liquid into the cylinder of the syringe, and reduce the resistance to the flow of the liquid even during the administration of the liquid. In addition to facilitating the use of the syringe without the addition of force, an increase in time is thereby avoided.

10: filter structure 12: screening film
14: cylindrical body 16: column
18, 66: incision 20, 38, 70: filter
22, 40, 50: Needle holder 24: Border
32: Slit 34: Suction part
36: discharge part 42: support
52a, 52b: first and second locking protrusions 54: close contact
56: through hole 58a, 58b: front and rear extension tubes
60: support member 62: skirt portion
64: extension 66: incision
68: valve member 72: cover
74: cover leg 76: cover member
80: filter unit 82: cylinder
82a: cylinder neck portion 84: piston
90: ringer body 92: ringer pipe
94: ringer connector G: guide step

Claims (8)

The needle holder 50 is fixed to the front end portion and the neck portion 82a of the cylinder 82 is fitted to the rear end portion, and between the needle holder 50 and the front end portion of the neck portion 82a. In the filter assembly for a syringe consisting of a filter unit 80 interposed therein,
The filter unit 80,
It forms a hollow penetrating in the front and back in the center in the tubular shape, the side that protrudes outwardly along the outer circumferential surface is in close contact with the inner circumference of the corresponding needle holder 50 and the front and rear between the hollow and the outer edge A close contact portion 54 having a through hole 56 penetrating in the rear direction, and a front and rear extension tube 58a extending forward and rearward from the front and rear surfaces of the hollow peripheral edge of the close contact portion 54, respectively; A supporting member 60 made of 58b); A rear opening having a hemispherical shape and convex toward the front and having an inner diameter equal to the outer diameter of the front extension tube 58a is inserted to cover the front extension tube 58a, and forms an incision line 66 at the center of the front end portion. A valve member (68) comprising an extension portion (64) and a skirt portion (62) extending from the rear end of the extension portion (64) to the outside to cover the through hole (56); And a filter 70 in which a front opening is formed in a shape of a bag and surrounds a side wall of the rear extension tube 58b.
A rear end portion forms a dome-shaped cover portion 72 covering the outside of the rear end portion of the rear extension pipe 58b, and includes two or more numbers spaced along the front end portion of the cover portion 72 to protrude forward. A cover member 76 having a cover leg 74;
The cover member 76 is moved rearward in the filter 70 by the flow pressure of the chemical liquid sucked in the direction of the cylinder 82 through the rear extension tube 58b during the suction process to cover the cover legs 74. Induces the flow of the chemical through the through, and during the administration process to move forward in response to the flow of the chemical in the direction of the needle (N) to cover the rear end of the rear extension tube (58b) to cover the flow of the chemical through the through hole (56) Direction);
The support member 60 is provided with a guide step (G) protruding outward so as to be connected to the inner rear side of the through hole 56 of the close contact portion 54 at the front end of the rear extension pipe (58b) the filter The guide step (G) is guided by the front end of the cover leg 74 advancing by the flow pressure of the drug solution during the administration of the drug solution, and the guide step (G) is the cover member ( 76) A filter assembly for a syringe, characterized in that configured to serve as a stopper. The method of claim 1,
The inner wall of the needle holder 50 has a first locking projection 52a corresponding to the front edge of the contact portion 54 at a predetermined position and a rear edge of the contact portion 54 at the position already set. At least a first catching protrusion among the corresponding second catching protrusions 52b,
The skirt 62 is a filter assembly for the syringe, characterized in that the outer edge is located below the inner diameter formed by the first locking projection (52a) in the installation state, outside the outer line of the through hole (56). The method of claim 1,
The needle holder 50 forms an inclined angle of the inner surface is extended toward the rear,
The close contact portion (54) is a filter assembly for a syringe, characterized in that the outer surface is in close contact with the inner surface of the needle holder (50) corresponding to the narrowing angle toward the top. The method of claim 1,
The skirt portion (62) is a filter assembly for a syringe, characterized in that formed in a shape that becomes thinner toward the outer edge from the rear opening of the valve member (68). delete delete A cylinder 82 having a single tube-shaped cylinder neck portion 82a formed at the front end, and having a space for accommodating the chemical liquid;
A piston (84) inserted through the rear opening of the cylinder (82) to move forward and backward in the longitudinal direction and provide a flow pressure of the chemical liquid into the cylinder (82) according to the movement;
Needle holder 50 of claim 1; And
Syringe comprising a; filter unit (80) of claim 1. Ringer body 90 for receiving the Ringer's solution;
A Ringer pipe 92 which forms a Ringer fluid flow passage in the Ringer body 90;
Ringer connecting pipe 94 is coupled to the Ringer pipe 92 is discharged of the Ringer liquid;
Needle holder 50 of claim 1; And
Ringer assembly comprising a; filter unit (80) of claim 1.

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