JP2011172615A - Medical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical connector having a simple structure and capable of being easily assembled. <P>SOLUTION: The medical connector 100 includes a connector body 200 having a female lure connector 201 at one end and a male lure connector 202 at the other end, and an elastically deformable valve stem 300 including a valve head 302 having a slit 303 at one end of a hollow body 301. When the male component is connected to the female lure connector 201, the valve stem 300 is elastically deformed to open the slit 303, so that passage of a liquid is possible. In this embodiment, the connector body 200 has a tubular fitting part 238 having a hollow part 238a continued to a hollow part 231a of a male lure 231 of the male lure connector 202 and extending toward the female lure connector 201. The tubular fitting part 238 is fitted into the hollow body 301 of the valve stem 300, so that the inside of the hollow part 301a of the valve stem 300 communicates with the hollow part 231a of the male lure 231 of the male lure connector 202 via the hollow part 238a of the tubular fitting part 238. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a medical connector, and more particularly to a medical connector including a connector main body and an elastically deformable valve stem disposed in the connector main body.

  Conventionally, as disclosed in Patent Document 1, as a medical connector, a cylindrical main body having an inlet end and an outlet end, a hollow pin disposed in the cylindrical main body, an elastic head, and an elastic hollow are provided. A slit formed in the elastic head of the seal member when the liquid introducer is inserted into the inlet end, and the slit that opens the inlet end through the opened slit, 2. Description of the Related Art A medical connector that communicates with an outlet end portion through a horizontal hole of a hollow pin and a hollow portion of the hollow pin is known.

Special table 2008-508016

  However, the conventional medical connector requires a hollow pin in addition to the connector main body and the seal member, and in order to introduce liquid into the hollow pin from the lateral hole of the hollow pin, the closed end portion of the hollow pin is used. Protrusions projecting in the axial direction and the radial direction are provided, and a fluid passage is formed by the projecting parts. For this reason, the number of parts constituting the connector is large, the shape of the parts is complicated, and there are problems that the workability of the assembly is poor because many parts having complicated shapes are assembled.

  Therefore, an object of the present invention is to provide a medical connector that is simple in structure and easy to assemble.

  Therefore, the medical connector according to the present invention comprises an elastic deformation comprising a connector body having a female luer connector at one end and a male luer connector at the other end, and a valve head having a slit at one end of the hollow body. A valve stem, and when the male component is connected to the female luer connector, the valve stem is elastically deformed by the male component pushing the valve head of the valve stem, and the slit is opened. The female luer connector communicates with the male luer connector through the slit, and when the male part is released, the valve stem returns to the liquid passage of the female luer connector. A medical connector for fitting the valve head in a state where the slit is closed and closing a liquid passage of the female luer connector, the male type The connector main body is provided with a cylindrical fitting portion extending toward the female luer connector, and the cylindrical fitting portion is provided in the hollow main body of the valve stem. It was inserted, and the inside of the hollow portion of the valve stem and the liquid passage of the male luer connector were communicated with each other through the hollow portion of the cylindrical fitting portion.

Here, the cylindrical fitting portion is erected on the back surface of the flange constituting the base portion of the male luer connector of the male luer connector, and the axial end surface of the hollow main body of the connector body is in contact with the back surface of the flange, The valve stem may be elastically deformed with the flange as a fixed end.
Further, the outer periphery of the hollow main body of the valve stem is formed into a corrugated shape that undulates along the axial direction, and when the valve head is pushed by the male part, the hollow main body of the valve stem is at least the wave It is better to be crushed in the axial direction at the mold part.

Further, a flange portion is integrally formed on the outer periphery of the hollow main body of the valve stem, while a step surface facing the flange portion in the axial direction is formed on the female luer connector side of the connector main body, and the flange The displacement of the hollow body toward the female luer connector may be limited by contact between the portion and the step surface.
Furthermore, the connector main body can be composed of two parts, a female part having the female luer connector and a male part having the male luer connector and a cylindrical fitting portion.

  The medical connector according to the present invention comprises a connector main body and a valve stem, has a small number of parts, and also includes a slit in the valve head of the valve stem, a hollow main body of the valve stem, and a tube fitted into the hollow main body. Since the liquid is allowed to pass between the female luer connector and the male luer connector via the fitting portion, the structure is simple, the shape of each part can be simplified, and the assembly can be easily performed. Further, since the cylindrical fitting portion having a hollow portion continuous with the liquid passage of the male luer connector is inserted into the hollow main body of the valve stem, the valve stem is positioned with respect to the connector main body, and the valve with respect to the connector main body. The assembly of the stem can be easily performed, and the liquid flow path can be secured when the valve stem is elastically deformed.

It is a figure which shows embodiment of the medical connector which concerns on this invention, (A) is a top view of a medical connector, (B) is side sectional drawing of a medical connector, (C) is a side external view of a medical connector. It is. It is an exploded view of the medical connector of the embodiment. It is a figure which shows the valve stem which comprises the medical connector of the said embodiment, (A) is a top view of a valve stem, (B) is side sectional drawing of a valve stem. It is a figure which shows the open state and connection state of the male part with respect to the female type luer connector of the medical connector of the said embodiment, (A) is side sectional drawing which shows the open state of a male part, (B) is the connection of a male part It is side surface sectional drawing which shows a state.

Hereinafter, an embodiment of a medical connector according to the present invention will be described with reference to the drawings.
1A and 1B show a medical connector 100 according to an embodiment. FIG. 1A is a top view, FIG. 1B is a side sectional view, and FIG. 1C is a side external view.
The medical connector 100 has a cylindrical shape with a total length of about 20 to 21 mm and a maximum outer diameter of about 11 to 12 mm, a connector main body 200 formed of a synthetic resin such as polypropylene, polyethylene, polystyrene, polycarbonate, silicon rubber, and natural rubber. And an elastically deformable valve stem 300 formed of an elastic material such as.

One end of the connector body 200 is formed with a female luer connector 201 having a locking screw formed on the outer periphery of the female luer, and the other end is formed with a male luer connector 202 made of a male luer with a lock ring. The medical connector 100 is an adapter that performs luer lock connection at both ends.
In the medical connector 100, for example, a female luer connector provided at the tip of the infusion line is connected to the male luer connector 202, and a male part such as a needleless syringe having a male luer with a lock ring is connected to the female luer connector 201. To do.

  Here, by connecting the male part to the female luer connector 201, the valve stem 300 is elastically deformed, the liquid passage in the medical connector 100 is opened, and a needleless syringe is connected as the male part. It is possible to inject or extract liquid with a syringe. On the other hand, when the male part connected to the female luer connector 201 is released, the valve stem 300 returns to close the liquid passage in the medical connector 100 and seals the liquid in the medical connector 100.

FIG. 2 is an exploded view of the medical connector 100. As shown in FIG. 2, the connector body 200 includes a female part 210 on the female luer connector 201 side and a male part 230 on the male luer connector 202 side. And consists of two parts. The female part 210 is a cylindrical member that includes a female luer connector 201 at one end and has the other end as an open end to which the male part 230 is fitted.
The female luer connector 201 includes a first tubular portion 213 having a luer tapered portion (a female luer portion) 211 that is a fitting hole into which a male luer is fitted as an inner periphery, and a male screw 212 for luer lock formed on the outer periphery. .

  The second tubular portion 214 having a larger outer diameter than the first tubular portion 213 forms a valve stem accommodation space that is continuous with the luer tapered portion 211. The hollow portion in the second tubular portion 214 has a diameter-expanding portion 216 that gradually increases the inner diameter from the same inner diameter as the inner diameter of the edge of the luer tapered portion 211 toward the male luer connector 202, and the maximum of the diameter-expanding portion 216. A housing portion 217 having an inner diameter larger than the inner diameter and housing the hollow main body 301 of the valve stem 300 inside thereof, and having an inner diameter larger than that of the housing portion 217, and fitting the open end of the male side component 230 inside. A fitting portion 218 is provided.

In the middle of the fitting portion 218 in the axial direction, a groove 218a into which the ring-shaped protrusion 236 formed on the outer periphery of the open end of the male part 230 is fitted is formed to be recessed over the entire circumference.
Here, at the boundary portion between the enlarged diameter portion 216 and the accommodating portion 217 and at the boundary portion between the accommodating portion 217 and the fitting portion 218, the inner lure connector 202 side is increased by increasing the inner diameter stepwise. The annular step surfaces 219 and 220 are formed.

On the other hand, the male-side component 230 is a cylindrical member that includes the male luer connector 202 at one end and uses the other end as an open end that fits into the female-side component 210.
The male luer connector 202 is a male luer with a lock ring that includes a male luer 231 fitted to the female luer and a first tubular portion 233 that surrounds the male luer 231 and has a female screw 232 for luer lock formed on the inner periphery. .

The male screw 212 of the female luer connector 201 and the female screw 232 of the male luer connector 202 are 2.5 mm pitches corresponding to a multi-standard screw (for example, screw standard ISO594-2: 1998 (E)). The Luer taper part 211 and the male luer 231 correspond to a common standard (for example, the luer standard ISO594 / 1: 1986), and can be connected so that the male part and the female part of the common standard can be attached and detached. It has sex.
A plurality of protrusions 234 extending along the axial direction are formed on the outer periphery of the first tubular portion 233 along the axial direction as a slip stopper in the tightening operation of the lock ring.

Continuing from the first cylindrical portion 233, a second cylindrical portion 235 that fits in the fitting portion 218 of the female side component 210 is provided, and the outer diameter of the second cylindrical portion 235 is the female side. It is set to a value slightly smaller than the inner diameter of the fitting portion 218 of the component 210, and the axial fitting between the female side component 210 and the male side component 230 is performed on the outer periphery of the second cylindrical portion 235. When the allowance reaches a predetermined value, a ring-shaped protrusion 236 that fits into the groove 218a of the female part 210 is formed to protrude.
Further, a flange 237 connected to the inner periphery of the second tubular portion 235 is formed at the base end portion of the male luer 231, and the flange 237 constituting the base end portion of the male luer 231 is the same as that of the male luer 231. An annular space surrounded by the tubular portion 233 is separated from an accommodation space for the valve stem 300 in the connector main body 200, in other words, a liquid passage.

Further, the second cylindrical portion 235 side surface (back surface) of the flange 237 has a hollow portion 238a continuous with the hollow portion 231a (liquid passage) of the male luer 231 and extends toward the female luer connector 201. A valve fitting portion (cylindrical fitting portion) 238 having a cylindrical shape is erected.
The female luer connector 201 and the male luer connector 202, and the valve fitting portion 238 are provided on the same axis as the axis of the connector main body 200.
The outer diameter of the valve fitting portion 238 is set to a diameter that fits into the hollow portion 301a of the hollow main body 301 of the valve stem 300, and the height of the valve fitting portion 238 is the length in the axial direction of the hollow portion 301a. It is set shorter than this.

Further, as shown in FIG. 3, the valve stem 300 includes a disk-shaped valve head 302 having a slit 303 at one end of the hollow main body 301. The diameter of the valve head 302 is a female luer connector. The slit 303 is set in such a manner that the luer tapered portion 211 (liquid passage) 201 is fitted to close the luer tapered portion 211 and the valve head 302 is fitted to the luer tapered portion 211. The closed state is maintained.

In addition, the outer periphery of the base end side of the hollow body 301 is formed in a corrugated shape that undulates along the axial direction. The portion 301b is crushed by being elastically deformed so as to fold the series of valleys and peaks.
In other words, by providing the corrugated portion 301b, when an axial load is applied to the valve stem 300, the hollow main body 301 is crushed along the axial direction without being bent halfway.

When assembling the medical connector 100 by assembling the above-described female part 210, male part 230, and valve stem 300, first, the valve stem 300 is put on the valve fitting portion 238 of the male part 230. Thus, the hollow portion 301 a of the valve stem 300 is fitted to the outside of the valve fitting portion 238, and the valve fitting portion 238 is inserted into the hollow portion 301 a of the hollow main body 301.
At this time, the open end side of the hollow body 301 is fitted into an annular space surrounded by the inner periphery of the second tubular portion 235 of the male part 230 and the outer periphery of the valve fitting portion 238, and the hollow body Positioning in the axial direction is performed by pushing the end surface on the release side of 301 to a position where the end surface of the flange 237 contacts the surface (back surface) on the second cylindrical portion 235 side.

Here, since the hollow portion 238a of the valve fitting portion 238 constitutes a liquid passage continuing to the liquid passage (hollow portion 231a) of the male luer connector 202, the valve stem 300 is assembled to the male-side component 230. A liquid passage from the hollow portion 231a of the male luer 231 to the hollow portion 301a of the valve stem 300 can be secured.
When the valve stem 300 is assembled to the male part 230, the second cylindrical part 235 of the male part 230 is then fitted inside the second cylindrical part 214 of the female part 210, and the female The ring-shaped protrusion 236 provided on the male part 230 side is pushed into the groove 218a provided on the side part 210 side, and the male part 230 and the ring-shaped protrusion 236 are fitted together. Temporarily fix the female side component 210 at the intended fitting position.

Thereafter, the male side component 230 and the female side component 210 are integrated with each other so as to seal a gap between the second cylindrical portion 214 and the second cylindrical portion 235 by ultrasonic welding, an adhesive, or the like.
When the male side component 230 and the female side component 210 are assembled, the valve head 302 of the valve stem 300 is fitted into the luer tapered portion 211 of the female luer connector 201 with the slit 303 closed, and the luer tapered portion 211. (Liquid passage) is closed.

As described above, in the state where the male connector is not connected to the female luer connector 201, the medical connector 100 is configured so that the valve head 302 of the valve stem 300 blocks the liquid passage on the female luer connector 201 side. The medical connector 100 can seal the liquid.
On the other hand, as shown in FIG. 4, when a male part 400 such as a needleless syringe having a male luer 401 with a lock ring is connected to the female luer connector 201, the tip of the male luer 401 becomes the valve head 302 of the valve stem 300. By pushing, the valve stem 300 is elastically deformed in the axial direction with the flange 237 as a fixed end and is crushed, and the valve head 302 is displaced to the male luer connector 202 side.

When the valve head 302 reaches the enlarged diameter portion 216 having an inner diameter larger than that of the Luer tapered portion 211, the pressure of the valve head 302 is loosened, and the elastic deformation in the direction in which the diameter of the valve head 302 becomes larger is possible. At this time, the tip of the male luer 401 pushes open the slit 303, and the male luer 401 further crushes the valve stem 300 while pushing the slit 303 open.
And finally, as shown in FIG. 4, while the male luer 401 fits into the luer taper part 211, the front-end | tip of the male luer 401 is inserted by the slit 303, the hollow part 401a of the male luer 401, the slit 303, a valve | bulb The hollow portion 301a of the stem 300, the hollow portion 238a of the valve fitting portion 238, and the hollow portion 231a of the male luer 231 constituting the male luer connector 202 are continuous as a space, and liquid can be distributed using the continuous space as a liquid passage. become.

  On the other hand, when the male part 400 (the needleless syringe) is disconnected from the female luer connector 201, the valve stem 300 is gradually crushed as the tip of the male luer 401 is retracted, and the tip of the male luer 401 is fitted into the slit 303. When the inserted valve head 302 is caught by the enlarged diameter portion 216, the tip of the male luer 401 comes out of the slit 303 and the slit 303 is closed, and the diameter of the valve head 302 returns to its original state by elastic force. In addition, the valve head 302 is displaced toward the luer tapered portion 211 by an elastic force that attempts to restore the axial collapse of the valve stem 300, and the luer taper with the valve head 302 closing the slit 303. In a state where the valve stem 300 is fitted to the groove portion 211 (liquid passage) and the luer taper portion 211 (liquid passage) is blocked. Back.

The medical connector described above is composed of two parts, ie, the connector main body 200 and the valve stem 300. Therefore, the number of parts is small, and the linear extension extends between the female luer connector 201 and the male luer connector 202. Since the liquid channel is formed, the structure of each part is simple, and the production of each part and the assembly of the medical connector can be easily performed.
In addition, a valve fitting portion 238 that is a cylindrical fitting portion constituting the liquid flow path is fitted into the open end of the valve stem 300 that opens and closes the liquid flow path, and the open end surface of the valve stem 300 is further inserted. Since the contact is made with the flange 237 provided on the outer periphery of the valve fitting portion 238, the positioning of the valve stem 300 and the securing of the liquid flow path during assembly can be easily performed.
Further, when the male part 400 is connected to the female luer connector 201 and the valve stem 300 is crushed, the valve fitting portion 238 indicates that the open end of the valve stem 300 is elastically deformed in the direction of narrowing the liquid flow path. Can be prevented.

In the above embodiment, the corrugated portion 301b is provided on the outer periphery of the hollow main body 301 so that the valve stem 300 is easily crushed in the axial direction, but instead of the corrugated portion 301b, the inner side of the peripheral wall of the hollow main body 301 is provided. And the outside can be formed in a bellows shape with irregularities in the axial direction, or a single or a plurality of cutouts can be provided on the outer periphery of the hollow body 301. A plurality of these may be provided in combination.
In addition, the outer shape of the valve head 302 of the valve stem 300 in a state where no load is applied is an ellipse, and the slit formed along the short direction of the ellipse is opened in a state where no load is applied. When the valve head 302 is fitted to the luer taper portion (female luer portion) 211 of the female luer connector 201 while maintaining the state, the longitudinal direction of the ellipse is compressed and the valve head 302 is elastically deformed into a circular shape. Thus, the slit can be closed.

  DESCRIPTION OF SYMBOLS 100 ... Medical connector, 200 ... Connector main body, 201 ... Female luer connector, 202 ... Male luer connector, 210 ... Female side component, 230 ... Male side component, 237 ... Flange, 238 ... Valve fitting part (cylindrical shape) Fitting part), 300 ... valve stem, 301 ... hollow body, 302 ... valve head, 303 ... slit, 400 ... male part

Claims (4)

A connector body having a female luer connector at one end and a male luer connector at the other end, and an elastically deformable valve stem comprising a valve head having a slit at one end of the hollow body,
When a male part is connected to the female luer connector, the male part presses the valve head of the valve stem, so that the valve stem is elastically deformed to open the slit, and the female type is opened through the slit. The luer connector communicates with the male luer connector,
When the male part is released, the valve stem returns to its original position, and the valve head is fitted in the liquid passage of the female luer connector with the slit closed, and the female luer connector A medical connector for closing a liquid passageway,
A hollow portion continuous with the liquid passage of the male luer connector is provided in the connector main body with a cylindrical fitting portion extending toward the female luer connector,
A medical device in which the tubular fitting portion is inserted into the hollow main body of the valve stem, and the hollow portion of the valve stem and the liquid passage of the male luer connector are communicated with each other through the hollow portion of the tubular fitting portion. Connector.   The cylindrical fitting portion is erected on the back surface of the flange constituting the base portion of the male luer connector of the male luer connector, and the axial end surface of the hollow body of the connector body is in contact with the back surface of the flange, The medical connector according to claim 1, wherein the valve stem is elastically deformed as a fixed end.   The outer periphery of the hollow body of the valve stem is formed into a corrugated shape that undulates along the axial direction, and when the valve head is pushed by the male part, the hollow body of the valve stem has at least the corrugated portion. The medical connector according to claim 1, wherein the medical connector is crushed in the axial direction.   The said connector main body consists of two components of the female side component provided with the said female type luer connector, and the male side component provided with the said male type luer connector and a cylindrical fitting part. Medical connector as described in 1.

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