JP2012223278A - Medical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical connector that can reduce the outer diameter of a housing while disposing in the housing an elastic member that biases a valve member in the direction that closes a liquid passage.SOLUTION: The medical connector 100 includes: a housing 200 having a male lure 213 at one end, and a female lure 230 on the other end; a valve member 300 that opens and closes a liquid passage; and an elastic member 400 that biases the valve member 300 in the direction that closes the liquid passage by an elastic force. The elastic member 400 is formed into a cylindrical shape by a silicone rubber or the like, is disposed between the valve member 300 and the housing 200, and has two or more grooves 401 formed at the circumference to be parallel each other and to extend diagonally to an axial direction. The elastic member 400 is provided with the grooves 401 to shrink while twisting around the axis, thereby the deformation toward the inside and outside of the diameter direction is a few when shrinks, the space that accommodates the elastic member 400 can be made narrow, the outer diameter of the housing is reduced, and the connector can be miniaturized.

Description

  The present invention relates to a medical connector, and more particularly to a medical connector having a male luer at one end and a female luer at the other end.

  Conventionally, a medical connector has a housing having a male luer at one end and a female luer at the other end, a valve member, and an elastic member, and the liquid passage is opened when the female luer is connected to the male luer of the housing. A medical connector that closes a liquid passage with a valve member when a female luer is removed from a male luer of a housing is known.

  In the medical connector, the elastic member is a component that biases the valve member in a direction to close the liquid passage. For example, the medical connector disclosed in Patent Document 1 includes a ring portion that fits on the outer periphery of the housing. The ring member fitted to the outer periphery of the valve member is connected to the elastic member made of silicon rubber by connecting the elastic member with a pair of elastic bands, and the pair of elastic bands is elastically deformed in the extending direction to open the liquid passage. The pair of elastic strips contract to close the liquid passage.

Special table 2009-500112 gazette

However, as in Patent Document 1, in the structure in which the outer periphery of the housing and the end of the valve member are connected by an elastic member and the elastic member is elastically deformed in the extending direction to open the liquid passage, There is a problem that the length becomes long and the shape and assembly of the parts become complicated.
Here, if the elastic member is disposed inside the housing and the elastic member is contracted, the liquid passage is opened, and the elastic member is stretched by the elastic return force to close the liquid passage. Without fixing to the housing or valve member, the valve member can be urged in the direction to close the male luer, the axial length of the connector can be shortened, and the shape and assembly of the parts can be simplified. It becomes possible.

However, when an elastic member such as silicon rubber is elastically deformed so as to be crushed in the axial direction of the housing, it is also deformed inward and outward in the radial direction of the housing, and an attempt is made to secure a space in the housing that allows this radial deformation. Then, there existed a problem that the outer diameter of a housing will become large.
Accordingly, an object of the present invention is to provide a medical connector capable of reducing the outer diameter of the housing while disposing an elastic member in the housing for biasing the valve member in the direction of closing the liquid passage. To do.

  Therefore, the medical connector according to the present invention is a housing having a male luer at one end and a female luer at the other end, and a valve member provided in the housing, and is fitted into the internal space of the male luer. A valve member movable between a first position for closing the liquid passage through the internal space of the male luer and a second position for opening the liquid passage apart from the male luer, and a cylindrical shape by an elastic material An elastic member that is disposed between the valve member and the housing and biases the valve member in a direction in which the valve member is fitted into the internal space of the male luer, with the movement of the valve member And an elastic member that expands and contracts in the axial direction while twisting around the axis.

Here, the elastic member may have a plurality of grooves extending obliquely with respect to the axial direction.
In addition, the housing has a cylindrical portion having an internal space continuous to the female luer in a space surrounded by the outer peripheral wall of the housing, and an outer periphery of the cylindrical portion and an inner periphery of the outer peripheral wall of the housing The cylindrical elastic member can be disposed in the annular space sandwiched between the two.

  Further, the male luer side end of the valve member is fitted and inserted into the internal space of the cylindrical portion, and the male luer is inserted through the internal passage of the valve member, one end of which is opened in the internal space of the cylindrical portion. A first seal member that seals between the valve member and the tubular portion, and a second seal member that seals between the valve member and the male luer. Can have.

  Further, the male luer side tip of the valve member is divided into a plurality of pieces, and the plurality of pieces are fitted into the internal space of the male luer at the first position and directed radially inward in the fitted state. Elastically deforms to close the internal space of the valve member, and when the valve member moves to the second position, each of the plurality of pieces expands radially outward to open the internal space of the valve member. Can be configured to

  In addition, a hole for communicating the internal passage of the valve member and the internal space of the male luer is formed in the peripheral wall of the valve member, and the distal end of the valve member on the male luer side is the interior of the male luer at the first position. A gap is formed between the male luer side tip of the valve member and the male luer at the second position, and the internal passage of the valve member is closed. The liquid passage that passes through the hole of the valve member and the annular space sandwiched between the outer periphery of the valve member and the inner periphery of the male luer can be opened.

  Further, the valve member includes at least one strut extending from the female luer side toward the male luer side, and the female luer connected to the male luer presses the strut to elastically deform the elastic member while pressing the strut. The valve member may be configured to move from the first position to the second position.

  According to the medical connector of the present invention, the elastic member expands and contracts in the axial direction while twisting around the axis as the valve member moves, so that when the elastic member is crushed in the axial direction, the elastic member faces inward and outward in the radial direction. Deformation can be suppressed, the space in the housing for accommodating the elastic member can be narrowed to reduce the diameter of the housing, and the medical connector can be miniaturized.

It is side surface sectional drawing which shows embodiment of the medical connector which concerns on this invention. It is a figure which shows the housing which comprises the medical connector of embodiment, (A) is a top view, (B) is side sectional drawing. It is a figure which shows the valve member which comprises the medical connector of embodiment, (A) is a top view, (B) is side sectional drawing, (C) is a side view. It is a figure which shows the elastic member which comprises the medical connector of embodiment, (A) is a top view, (C) is a side surface fragmentary sectional view. It is a figure for demonstrating the expansion-contraction characteristic of the elastic member which comprises the medical connector of embodiment. It is side surface sectional drawing which shows the state which connected the female luer connector to the male luer of the medical connector of embodiment. It is side surface sectional drawing which shows another example of the valve member which comprises the medical connector of embodiment.

Hereinafter, an embodiment of a medical connector according to the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view of a medical connector 100 according to an embodiment.
The medical connector 100 has a housing 200 having a male luer 213 at one end and a female luer 230 at the other end, a valve member 300 that opens and closes the liquid passage, and biases the valve member 300 in a direction to close the liquid passage. And an elastic member 400.
When the female luer 213 is connected to the male luer 213 of the medical connector 100, the internal liquid passage is opened, the liquid flows between the male luer 230 and the male luer 213, and when the female luer is removed from the male luer 213, the internal liquid passage is closed. Blocks liquid flow between the female luer 230 and the male luer 213.

As shown in FIGS. 2A and 2B, the housing 200 is composed of two parts, a male part 220 having a male luer connector 210 with a lock ring and a female part 240 having a female luer 230. By joining the component 220 and the female component 240 by welding or the like, the housing 200 that accommodates the valve member 300 and the elastic member 400 is formed.
The housing 200 (male part 220 and female part 240) is formed of a synthetic resin such as polypropylene, polyethylene, polystyrene, or polycarbonate.

A male luer connector 210 with a lock ring includes a bottomed cylindrical lock ring 212 in which a female screw 211 is formed on an inner peripheral wall, and a male luer 213 standing from a bottom wall 212 a of the lock ring 212.
The male luer 213 is formed in a cylindrical shape with both ends open, and the inner space 213a of the male luer 213 is gradually narrowed through the inclined portion 213c at the front end side opened to the outside to form a seat portion 213b. When the tip of the valve member 300 is fitted, the internal space 213a of the male luer 213 is closed, and the flow of liquid through the internal space 213a of the male luer 213 is blocked.

The male part 220 includes a skirt portion 221 that continuously forms the outer periphery of the housing 200 continuously with the lock ring 212, and the open end of the female part 240 is joined to the inner periphery of the skirt portion 221. And the female part 240 are integrated to form the housing 200.
Strut through holes 214 and 214 are opened on both sides of the bottom wall 212a around the root of the male luer 213 across the central axis of the male luer 213. The lock ring 212, the male luer 213, and the like are formed through the through holes 214 and 214. The annular space H <b> 1 sandwiched between and the space H <b> 2 where the proximal end side of the male luer 213 is open communicates.

On the other hand, the female part 240 includes a cylindrical part 241 having an internal space 241a that extends continuously to the male luer 213 and extends to the male luer 213 side, and surrounds the outer periphery of the cylindrical part 241 via the annular space H3. The outer peripheral portion 243 is fitted inside the skirt portion 221 of the male component 220.
As a result, a liquid passage for communicating the male luer connector 210 of the male part 220 and the female luer 230 of the female part 240 is formed in the housing 200.

FIGS. 3A, 3 </ b> B, and 3 </ b> C illustrate a valve member 300 that is formed of a synthetic resin such as polypropylene, polyethylene, polystyrene, or polycarbonate and is provided in the housing 200.
The valve member 300 is assembled in the housing 200 with the upper side of FIGS. 3B and 3C as the male luer connector 210 side and the lower side of FIGS. 3B and 3C as the female luer 230 side.

The valve member 300 includes a cylindrical valve main body 301, a flange 302 formed on the outer periphery of the valve main body 301, a pair of struts 303 erected from the end surface on the male luer 213 side of the flange 302 toward the male luer 213, 303 and a cylindrical portion 304 extending from the periphery of the flange portion 302 toward the female luer 230 side are integrally provided.
The valve member 300 can include only one or three or more struts 303, and the strut through-hole 214 is formed on the housing 200 side in accordance with the number and position of the struts 303.

Further, a first O-ring (first seal member) 311 is fitted to the outer periphery of the valve main body 301 below the flange portion 302 (on the female luer 230 side), and above the flange portion 302 (on the male luer 213 side). A second O-ring (second seal member) 312 is fitted to the outer periphery of the valve main body 301.
The first and second O-rings (O-rings) 311 and 312 are formed in an annular shape by an elastic material such as silicon rubber, and are fitted into a groove 305 that is recessed in the outer periphery of the valve member 300.

When the end of the valve body 301 on the male component 220 side is inserted into the internal space 213a of the male luer 213, a gap G1 between the outer periphery of the valve main body 301 and the inner periphery of the male luer 213 is set to the second auto Since the ring (second seal member) 312 is closed, the liquid is prevented from leaking out of the housing 200 through the gap G1 and the through holes 214 and 214.
The end of the valve body 301 on the female part 240 side is inserted into the tubular part 241 of the female part 240, and the gap G2 between the outer periphery of the valve body 301 and the inner periphery of the tubular part 241 By blocking the 1 O-ring (first seal member) 311, the liquid is prevented from leaking out of the housing 200 through the gap G <b> 2 and the through holes 214 and 214.

The distal end of the valve body 301 on the male part 220 side is divided into two planes including the central axis, thereby having semi-cylindrical tip seal portions 306 and 306. These tip seal portions 306 and 306 are: In the unloaded state, they are displaced radially outward from each other, and when they are applied with forces in directions approaching each other (forces toward the center in the radial direction), they are elastically deformed and are in close contact with each other. In the close contact state, the front end side is closed to a cylindrical shape with a diameter that fits into the sheet portion 213b of the male luer 213.
In the present embodiment, the tip of the valve body 301 on the male part 220 (male luer 213) side is divided into two parts, but it may be divided into a plurality of pieces, and the number of divisions should be set to three or more. Can do.

The pair of struts 303 and 303 are positioned on both sides of the valve main body 301 so as to be aligned with the strut through holes 214 and 214 on the male luer 213 side, and parallel to the axis of the valve main body 301. It extends toward the male lure 213 side.
When the valve member 300 is assembled to the housing 200, as shown in FIG. 1, the struts 303 and 303 are inserted from the male luer 230 side into the strut through-holes 214 and 214 on the male luer 213 side. The tip 303a of 303 is positioned in an annular space H1 surrounded by the inner periphery of the lock ring 212 and the outer periphery of the male luer 213.

The cylindrical portion 304 of the valve member 300 is formed to have an inner and outer diameter that can be inserted into the annular space H3 provided in the female part 240 of the housing 200. The elastic member 400 is made of an elastic material such as silicon rubber. It is formed in a cylindrical shape having inner and outer diameters that can be inserted into the annular space H3.
As shown in FIGS. 4A and 4B, the elastic member 400 has a plurality of mutually parallel grooves 401 extending in an oblique direction with respect to the axial direction, and includes such grooves 401. Thus, when a force that crushes the elastic member 400 in the axial direction is applied, the elastic member 400 is contracted while twisting around the axis, and when unloaded, it is expanded while releasing the twist when contracted to return to the original length. It is.

For example, in the case where the grooves 401 are formed in the direction shown in FIG. 4B, when a crushing load is applied from the upper side of the elastic member 400 in FIG. 4B, each groove is formed as shown in FIG. When the elastic member 400 is crushed so as to narrow the width of the 401, the elastic member 400 is crushed while twisting clockwise when viewed from the side to which the crushing load is applied, and when unloaded, the elastic member 400 is twisted counterclockwise. Will grow.
In the state where the valve member 300 and the elastic member 400 are assembled to the housing 200, the open end edge of the tubular portion 304 of the valve member 300 abuts on the upper end edge of the elastic member 400 as shown in FIG. The elastic member 400 is compressed in the axial direction, and the elastic restoring force (force to extend in the axial direction) generated by the elastic member 400 is caused to fit the valve member 300 in the internal space 213a of the male luer 213. Acts as an energizing force.

The urging force maintains the state where the tip seal portions 306 and 306 of the valve main body 301 are fitted to the seat portion 213b while being in close contact with each other. At this time, the valve main body portion is placed on the inner periphery of the seat portion 213b. Since the tip outer periphery of 301 is in close contact, and the tip seal portions 306 and 306 are in close contact with each other, the flow of liquid through the internal space 213a of the male luer 213 is prevented.
Here, for example, even if the male luer connected to the other end of the tube having one end connected to the drip bag is connected to the female luer 230 of the medical connector 100, the tip of the valve main body 301 is closed so that the seat portion 213b is fitted. The state is maintained, and the liquid in the drip bag does not leak through the medical connector 100.

On the other hand, as shown in FIG. 6, for example, when a female luer connector 500 connected to one end of a catheter is connected to the male luer connector 210, the female luer connector 500 is rotated and screwed into the lock ring 212. By the operation, the tip of the female luer connector 500 is gradually displaced toward the bottom wall 212a in the annular space H1.
At this time, the distal end of the female luer connector 500 abuts against the distal end 303a of the struts 303 and 303, so that the valve member 300 is displaced in a direction approaching the female luer 230 in conjunction with the movement of the female luer connector 500. The elastic member 400 sandwiched between the cylindrical portion 304 of the member and the housing 200 is pressed in the axial direction and contracts in the axial direction.

  Since the elastic return force toward the radially outer side acts on the tip seal portions 306 and 306 of the valve main body 301, the tip seal portions 306 and 306 are displaced when the valve member 300 is displaced in a direction approaching the female luer 230. Is released from the seat portion 213b and reaches the inclined portion 213c, and a space that can be separated from each other is generated, the tip seal portions 306 and 306 are separated from each other, and a gap is generated between the tip seal portions 306 and 306, and the valve body The internal space 301a of the portion 301 communicates with the internal space 213a of the male luer 213 through a gap between the seal portions 306 and 306.

  As described above, when the valve member 300 is located at the second position separated from the male luer 213, the end of the valve main body 301 on the female part 240 side is fitted into the cylindrical part 241 of the female part 240. In this state, the liquid passage composed of the female luer connector 500, the male luer 213, the valve main body 301, the cylindrical portion 241 and the female luer 230 communicates, and the liquid (medical solution) in the drip bag is used for medical purposes. It flows into the catheter side through the connector 100.

On the other hand, when the operation of removing the female luer connector 500 from the male luer connector 210 is performed, the valve member 300 is urged toward the male luer connector 210 by the elastic return force of the elastic member 400, so The luer connector 500 is displaced in a direction approaching the male luer connector 210 in conjunction with the movement of the tip of the luer connector 500 away from the bottom wall 212a.
When the tip seal portions 306 and 306 of the valve main body 301 are pressed against the inclined portion 213c of the internal space 213a of the male luer 213, a force that elastically deforms the tip seal portions 306 and 306 radially inward is generated. The tip seal portions 306 and 306 gradually approach each other by proceeding in the inclined portion 213c, and the tip seal portions 306 and 306 are in close contact with each other at the narrowest portion of the inclined portion 213c.

When the front end seal portions 306 and 306 are in close contact with each other, the end portion of the valve main body 301 is fitted into the seat portion 213b.
In this way, at the first position of the valve member 300 where the tip of the valve main body 301 is fitted to the seat 213b, the outer periphery of the tip of the valve main body 301 is in close contact with the inner periphery of the seat 213b. Since the portions 306 and 306 are in close contact with each other, the internal space 301a of the valve main body 301 and the internal space 213a of the male luer 213 are closed, and the flow of liquid through the internal space 213a of the male luer 213 is blocked, and the drip bag The liquid inside is prevented from leaking out of the medical connector 100.

As described above, the medical connector 100 of the present embodiment has the first position where the valve member 300 closes the liquid passage in the housing 200 in accordance with the attachment / detachment of the female luer connector 500 to the male luer connector 210; It is a connector that moves between a second position where the liquid passage in the housing 200 is opened.
When the female luer connector 500 is connected to the male luer connector 210 (at the first position of the valve member 300), the elastic member 400 is crushed in the axial direction. By forming the slanted groove 401, the elastic member 400 is crushed while twisting, so that deformation of the elastic member 400 inward and outward in the radial direction can be suppressed.
When the elastic member 400 is formed in a straight tube having a certain thickness without the oblique groove 401, the elastic member 400 is crushed without being twisted. In this case, the elastic member 400 is undulated in the axial direction. This undulating portion protrudes inward or outward in the radial direction.

Since the elastic member 400 is installed in the annular space H3 that is sandwiched between the outer periphery of the cylindrical portion 241 and the inner periphery of the outer peripheral portion 243 of the female component 240, the elastic member 400 extends along the axial direction when the elastic member 400 is crushed. When waviness occurs, this wavy portion (a portion protruding radially outward or inward) may press against the outer peripheral wall of the cylindrical portion 241 or the inner peripheral wall of the outer peripheral portion 243.
In this case, when the female luer connector 500 is removed and the elastic member 400 is extended, the wavy portion is caught on the outer peripheral wall of the cylindrical portion 241 or the inner peripheral wall of the outer peripheral portion 243, so that the elastic member 400 is restored to its original shape. Accordingly, the urging force that pushes the valve member 300 toward the male luer 213 is insufficient, and the valve body 300 is in a closed state in which the tip seal portions 306 and 306 of the valve main body portion 301 are fitted to the seat portion 213b in close contact with each other. It may not be possible to recover, and liquid leakage may occur.

In order to prevent the occurrence of the above-mentioned poor closing (liquid leakage), even if the annular space H3 is enlarged and the elastic member 400 undulates along the axial direction, the inner wall of the cylindrical part 241 and the inner part of the outer peripheral part 243 What is necessary is just not to be caught on a surrounding wall. However, enlarging the annular space H3 increases the outer diameter of the housing 200 (female component 240), which increases the size of the medical connector 100.
On the other hand, the elastic member 400 of the present embodiment has a slanted groove 401 formed on the outer periphery, which is crushed while twisting, and the deformation toward the inside and outside in the radial direction of the elastic member 400 is suppressed. Even if H3 is not enlarged, it is possible to prevent the occurrence of liquid leakage by suppressing the deformation portion from being caught on the outer peripheral wall of the cylindrical portion 241 and the inner peripheral wall of the outer peripheral portion 243. In other words, by using the elastic member 400 in which the slanted groove 401 is formed on the outer periphery, the medical connector 100 capable of closing the liquid passage in a small size and stably can be provided.

In the above embodiment, the oblique groove 401 is formed on the outer periphery of the elastic member 400 so that the elastic member 400 is crushed while twisting, but the groove may be formed only on both the inner and outer periphery sides or on the inner peripheral side.
Further, a plurality of holes extending in a direction oblique to the axis are provided in the peripheral wall of the elastic member 400 so that the elastic member 400 is crushed while twisting, or the annular frame member is attached to both ends in the axial direction. The members formed in a rod shape with elastic materials are respectively spanned between the annular frame members so as to be inclined with respect to the axial direction, and a plurality of rod-shaped elastic members are interposed between the pair of frame members. By connecting, the elastic member 400 can be crushed while twisting.
That is, the peripheral wall of the elastic member 400 is repeatedly formed by a portion having a low rigidity (including space) extending along a direction oblique to the axis and a portion having a relatively high rigidity parallel to the low rigidity portion. By configuring, it can be crushed while twisting around the axis.

  Further, in the above embodiment, when the female luer connector 500 is connected to the male luer connector 210, the tip seal portions 306 and 306 provided at the tip of the valve body 301 are separated from each other, so that the inside of the male luer 213 The space 213a and the internal space 301a of the valve main body 301 are configured to communicate with each other. However, the distal end of the valve main body 301 is connected to the male luer 213 like a medical connector disclosed in JP-T-2009-500112. A configuration in which the internal space 213a of the male luer 213 and the internal space 301a of the valve main body 301 are communicated with each other through a hole opened in the peripheral wall of the valve main body 301 while being used as a valve for closing the internal space 213a. can do.

Specifically, as shown in FIG. 7, the tip of the valve body 301 is formed in a cylindrical shape that fits into the seat 213 b, while the inner wall 301 a of the valve body 301 is formed on the peripheral wall of the valve body 301. A hole 315 that communicates with the internal space 213a of the male lure 213 is formed.
When the female luer connector 500 is removed from the male luer connector 210, the columnar portion 316 at the tip of the valve main body 301 is moved to the first position where it is fitted to the seat portion 213b of the male luer 213. The internal space 213a of the male luer 213 is closed, and the flow of liquid through the internal space 213a of the male luer 213 is blocked.

  On the other hand, in the state where the female luer connector 500 is attached to the male luer connector 210 (the state of FIG. 7), the valve member 300 is displaced in the direction approaching the female luer 230 and is positioned at the first position. The columnar part 316 at the tip of the valve body 301 is removed from the seat part 213b of the male luer 213, and a gap is formed between the columnar part 316 at the tip of the valve body 301 and the seat part 213b. As a result, the internal space 301a of the valve body 301, the hole 315 of the valve body 301, and the liquid passage that passes through the annular space sandwiched between the outer periphery of the valve body 301 and the inner periphery of the male luer 213 are opened.

In the above embodiment, the struts 303 of the valve member 300 function as a detent that prevents the valve member 300 from rotating about its axis, and the valve member 300 is interlocked when the elastic member 400 expands and contracts while twisting. Thus, the elastic member 400 is twisted while being in sliding contact with the valve member 300, but the valve member 300 may be configured to move back and forth in the axial direction while rotating in conjunction with the torsion of the elastic member 400. Is possible.
As a structure for allowing the valve member 300 to move back and forth in the axial direction while rotating, for example, the circumferential lengths of the strut through-holes 214 and 214 are long enough to allow the valve member 300 to rotate. By setting the length, it is possible to adopt a structure in which the rotation of the valve member 300 accompanying the twist of the elastic member 400 is not limited by the engagement between the strut 303 and the through holes 214 and 214.

Further, the valve member 300 can be actively rotated around the axis as the valve member 300 moves back and forth in the axial direction. For example, the strut 303 and the strut through-hole 214 are formed by raising the strut 303 obliquely. , 214, a component force acting in the rotational direction can be generated.
If the valve member 300 is structured to move back and forth in the axial direction while rotating, in the medical connector having a structure in which the liquid passage is opened and closed by separating the tip seal portions 306 and 306 as in the present embodiment, The seal portions 306 and 306 can be prevented from being caught by the inclined portion 213c and the like, and a smoother opening / closing operation can be performed.

  DESCRIPTION OF SYMBOLS 100 ... Medical connector, 200 ... Housing, 210 ... Male luer connector, 213 ... Male luer, 214 ... Strut through-hole, 220 ... Male part, 230 ... Female luer, 240 ... Female part, 303 ... Strut, 300 ... Valve member , 306 ... Tip seal portion, 311 ... First O-ring (first seal member), 312 ... Second O-ring (second seal member), 315 ... Hole, 400 ... Elastic member, 401 ... Groove, 500 ... Female type Luer connector

Claims (7)

A housing having a male luer at one end and a female luer at the other end;
A valve member provided in the housing, wherein the liquid passage is fitted in the internal space of the male luer and closes the liquid passage passing through the internal space of the male luer, and is separated from the male luer. A valve member movable between a second position for opening
An elastic member that is formed in a cylindrical shape by an elastic material, is disposed between the valve member and the housing, and biases the valve member in a direction of fitting into the internal space of the male luer, the valve member An elastic member that expands and contracts in the axial direction while twisting around the axis with the movement of
Medical connector with   The medical connector according to claim 1, wherein the elastic member has a plurality of grooves extending obliquely with respect to the axial direction. The housing has a cylindrical portion having an internal space continuous to the female luer in a space surrounded by an outer peripheral wall of the housing;
The medical connector according to claim 1 or 2, wherein the cylindrical elastic member is disposed in an annular space sandwiched between an outer periphery of the cylindrical portion and an inner periphery of the outer peripheral wall of the housing. An end of the valve member on the female luer side is inserted into the internal space of the cylindrical portion, and the male luer and the above-mentioned are connected through an internal passage of the valve member, one end of which is opened in the internal space of the cylindrical portion. It is the composition which makes communication with the female lure,
The medical connector according to claim 3, further comprising: a first seal member that seals between the valve member and the tubular portion; and a second seal member that seals between the valve member and the male luer.   The male luer side tip of the valve member is divided into a plurality of pieces, and the plurality of pieces are fitted into the internal space of the male luer at the first position and elastically deformed radially inward in the fitted state. Then, the internal space of the valve member is closed, and when the valve member moves to the second position, each of the plurality of pieces spreads outward in the radial direction to open the internal space of the valve member. Item 5. The medical connector according to Item 4. A hole for communicating the internal passage of the valve member and the internal space of the male luer is formed in the peripheral wall of the valve member,
In the first position, the male luer side tip of the valve member is fitted into the internal space of the male luer, and the internal space of the male luer is closed,
In the second position, a gap is formed between the male luer side tip of the valve member and the male luer, and the internal passage of the valve member, the hole of the valve member, and the outer periphery of the valve member and the male luer The medical connector according to claim 4, wherein a liquid passage that passes through an annular space sandwiched between the inner periphery and the inner periphery is opened. The valve member comprises at least one strut extending from the female luer side toward the male luer side;
The female member connected to the male luer presses the strut, so that the valve member moves from the first position to the second position while elastically deforming the elastic member. The medical connector as described.

Images