JP6757275B2 - Medical connector and infusion set - Google Patents

Description

The present invention relates to a medical connector and an infusion set.

Conventionally, when performing infusion, blood transfusion, artificial dialysis, etc., the liquid is sent into the body using a medical tube. Then, when another liquid such as a chemical solution is merged with the liquid in the medical tube, a medical connector capable of tightly connecting the male connector such as a syringe or a luer taper member to the medical tube is used.

A medical connector to which such a male connector can be connected is disclosed in, for example, Patent Document 1. In the medical connector disclosed in Patent Document 1, a disc-shaped elastic valve body having a slit formed in a tubular housing is arranged, and an outer peripheral portion of the elastic valve body is supported by the housing and mounted. It was done. Specifically, annular grooves extending in the circumferential direction are formed on both the inner and outer surfaces of the elastic valve body of Patent Document 1, and the locking protrusions of the housing are locked in each of the annular grooves.

International Publication No. 2014/046271

In the medical connector disclosed in Patent Document 1, the slit of the elastic valve body is formed by three or more notches extending radially from the central portion toward the outer peripheral side, so that the elastic valve body can be inserted when the male connector is inserted. It prevents it from falling out of the housing, but there is still room for improvement.

An object of the present invention is to provide a medical connector and an infusion set capable of suppressing the elastic valve body from falling off from the housing when the male connector is inserted.

The medical connector as the first aspect of the present invention includes a housing for partitioning an insertion opening into which a male connector can be inserted, and an elastic valve body having a slit and closing the insertion opening. A sandwiching portion for holding the elastic valve body in contact with the top surface of the elastic valve body and the bottom surface on the opposite side of the top surface is provided, and the sandwiching portion views the elastic valve body from the top surface side. In this case, the bottom surface side holding portion that is provided so as to surround the slit and is in contact with the bottom surface is located radially outside the top surface side holding portion that is in contact with the top surface, and the top surface side sandwiching portion is provided. The distance between the top surface side holding portion and the bottom surface side holding portion in the radial direction is larger than the distance between the portion and the bottom surface side holding portion in the insertion direction.

In one embodiment of the present invention, the top surface side sandwiching portion is the tip surface of the annular protrusion, and the inner edge of the tip surface of the annular protrusion differs in the radial direction depending on the position in the circumferential direction.

As one embodiment of the present invention, the tip surface of the annular protrusion has a first end surface portion and a second end surface portion whose inner edge is located inside the first end surface portion in the radial direction. The first end face portion and the second end face portion are alternately arranged in the circumferential direction.

As one embodiment of the present invention, a groove portion penetrating to the tip surface is formed on the inner peripheral surface of the annular protrusion, and the first end surface portion has a groove bottom of the groove portion of the tip surface. It is composed of continuous parts.

As one embodiment of the present invention, the groove bottom includes an inclined bottom portion that inclines so as to move away from the central axis of the annular projection toward the tip surface.

As one embodiment of the present invention, a plurality of the groove portions are formed in the circumferential direction, and the second end surface portion is formed by a portion between adjacent groove portions in the circumferential direction.

As one embodiment of the present invention, the second end surface portion includes the central axis of the annular projection and is substantially orthogonal to the inner peripheral surface in a cross section along the central axis of the annular projection.

As one embodiment of the present invention, the housing comprises a cap for partitioning the insertion opening and a holder for partitioning a flow path that supports the cap and communicates with the insertion opening. A top surface cap having a top surface side holding portion and a bottom surface cap having the bottom surface side holding portion are provided.

An infusion set as a second aspect of the present invention includes the medical connector and a medical tube to which the medical connector can be connected.

According to the present invention, it is possible to provide a medical connector and an infusion set capable of suppressing the elastic valve body from falling off from the housing when the male connector is inserted.

It is a perspective view of the medical connector as one Embodiment of this invention. It is a figure which looked at the connector shown in FIG. 1 from the top surface side of the elastic valve body. FIG. 2 is a cross-sectional view taken along the line II of FIG. It is a perspective view of the elastic valve body alone shown in FIG. FIG. 5A is a view of the elastic valve body unit of FIG. 4 as viewed from the top surface side, and FIG. 5B is a view of the elastic valve body unit of FIG. 4 as viewed from the bottom surface side. 6 (a) is a side view of the elastic valve body in FIG. 5 (b) viewed in the direction of arrow II, and FIG. 6 (b) is a view of the elastic valve body in FIG. 5 (b) in the direction of arrow III. It is a side view. 7 (a) is a sectional view taken along line IV-IV in FIG. 5 (b), and FIG. 7 (b) is a sectional view taken along line V-V in FIG. 5 (b). FIG. 3 is an enlarged cross-sectional view showing the vicinity of the elastic valve body of FIG. It is sectional drawing which shows the modification of the connector shown in FIG. It is sectional drawing which shows the modification of the connector shown in FIG. It is a perspective view which shows the top surface cap alone shown in FIG. 11 is a view of the top cap unit of FIG. 11 as viewed from the lower surface side of the flange portion. It is a vertical cross-sectional view at a position different from FIG. 3 and FIG. It is a figure which shows the connector in the state which the male connector is inserted in the insertion opening. It is a figure which shows the infusion set which is one Embodiment of this invention. It is sectional drawing of the medical connector as a comparative example.

Hereinafter, embodiments of the medical connector and the infusion set according to the present invention will be described with reference to FIGS. 1 to 16. The same reference numerals are given to the members and parts that are common in each figure.

First, one embodiment of the medical connector according to the present invention will be described. FIG. 1 is a perspective view showing a medical connector 1 (hereinafter, simply referred to as “connector 1”) as the present embodiment. As shown in FIG. 1, the connector 1 includes a housing 2 and an elastic valve body 3 to which the housing 2 is attached.

FIG. 2 is a view of the connector 1 as viewed from the top surface 3a side of the elastic valve body 3. FIG. 3 is a sectional view taken along line II of FIG. As shown in FIG. 3, the housing 2 partitions the hollow portion 4. The elastic valve body 3 is located in the hollow portion 4. The hollow portion 4 has an insertion opening 5 into which the male connector 100 (see FIG. 14) can be inserted from the outside and a flow path 6 communicating with the insertion opening 5, and the elastic valve body 3 closes the insertion opening 5. .. In other words, the housing 2 partitions an insertion opening 5 into which the male connector 100 can be inserted and a flow path 6 communicating with the insertion opening 5. The "flow path communicating with the insertion opening" means not only a flow path directly connected to the insertion opening but also a flow path connected to the insertion opening via a space different from that of the insertion opening. The flow path 6 of the present embodiment is a flow path that is directly connected to the insertion opening 5.

The housing 2 includes a cap 7 for partitioning the insertion opening 5 into which the male connector 100 (see FIG. 14) is inserted from the outside, and a holder 8 for partitioning the flow path 6 and supporting the cap 7.

The cap 7 has a top surface cap 9 and a bottom surface cap 10, and the elastic valve body 3 is compressed and sandwiched by the top surface cap 9 and the bottom surface cap 10 to be inside the hollow portion 4, specifically, the insertion opening 5. The position within is fixed.

The holder 8 is a member that partitions the flow path 6 and supports the top surface cap 9 and the bottom surface cap 10. In the present embodiment, both the top surface cap 9 and the bottom surface cap 10 are supported by contacting the holder 8, but the bottom surface cap 10 is held by the top surface cap 9 and only the top surface cap 9 is supported. It may be configured to be in contact with the holder 8 and supported by the holder 8. On the contrary, the top surface cap 9 may be held by the bottom surface cap 10, and only the bottom surface cap 10 may be brought into contact with the holder 8 to be supported by the holder 8.

In the present embodiment, the top surface cap 9 and the bottom surface cap 10 partition the insertion opening 5. Further, the holder 8 partitions a part of the insertion opening 5 and the flow path 6.

Materials of the holder 8, the top cap 9 and the bottom cap 10 of the housing 2 include, for example, a polyolefin such as polyethylene, polypropylene, and an ethylene-propylene copolymer; an ethylene-vinyl acetate copolymer (EVA); a polyvinyl chloride; Polyvinylidene chloride; polystyrene; polyamide; polyimide; polyamideimide; polycarbonate; poly- (4-methylpentene-1); ionomer; acrylic resin; polymethylmethacrylate; acrylonitrile-butadiene-styrene copolymer (ABS resin); acrylonitrile- Styrene copolymer (AS resin); butadiene-styrene copolymer; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT); polyether; polyetherketone (PEK); poly Ether ether ketone (PEEK); polyetherimide; polyacetal (POM); polyphenylene oxide; modified polyphenylene oxide; polysulfone; polyethersulfon; polyphenylene sulfide; polyallylate; aromatic polyester (liquid crystal polymer); polytetrafluoroethylene, polyphenyl Examples thereof include various resin materials such as vinylidene carbonate and other fluororesins. Further, a blend containing one or more of these, a polymer alloy, or the like may be used. In addition, various glass materials, ceramic materials, and metal materials may be used.

The elastic valve body 3 has a slit 11 so that the male connector 100 (see FIG. 14) can be elastically deformed and opened and closed when the male connector 100 (see FIG. 14) is attached to and detached from the connector 1, and the top surface cap 9 and the bottom surface as the cap 7 are provided. It is arranged so as to close the insertion opening 5 partitioned by the cap 10. Specifically, the elastic valve body 3 is sandwiched by the sandwiching portion 48 composed of the top surface cap 9 and the bottom surface cap 10, and the position in the connector 1 is fixed.

The elastic valve body 3 is molded and elastically deformable. Examples of the material of the elastic valve body 3 include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, urethane rubber, and silicone rubber. Various rubber materials such as fluororubber, and various heats such as styrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, transpolyisoprene-based, fluororubber-based, and chlorinated polyethylene-based Examples include plastic rubber, and one or a mixture of two or more of these may be used.

The hardness of the elastic valve body 3 is preferably 20 to 60 ° (A hardness). As a result, an appropriate elastic force can be secured in the elastic valve body 3, so that the elastic valve body 3 can be elastically deformed, which will be described later.

The details of each member and the feature portion composed of each member in the present embodiment will be described below.

[Elastic valve body 3]
FIG. 4 is a perspective view of the elastic valve body 3 alone. FIG. 5 (a) is a view of the elastic valve body 3 alone from the top surface 3a side, and FIG. 5 (b) is a view of the elastic valve body 3 alone from the bottom surface 3b side. 6 (a) is a side view of the elastic valve body 3 in FIG. 5 (b) viewed in the direction of arrow II, and FIG. 6 (b) shows the elastic valve body 3 in FIG. 5 (b) in the direction of arrow III. It is a side view seen in. 7 (a) is a sectional view taken along line IV-IV in FIG. 5 (b), and FIG. 7 (b) is a sectional view taken along line V-V in FIG. 5 (b). The top surface 3a of the elastic valve body 3 means a surface in which at least a part of the elastic valve body 3 is exposed to the outside while the elastic valve body 3 is attached to the housing 2. The bottom surface 3b of the elastic valve body 3 is a surface opposite to the top surface 3a.

As shown in FIGS. 4 to 7, the elastic valve body 3 is a flat disk-shaped valve body having a substantially circular outer shape when viewed from the top surface 3a side. Further, as shown in FIG. 4, the elastic valve body 3 is located between the constricted portion 12 sandwiched by the sandwiching portion 48 (see FIG. 3) of the housing 2 described later and the position sandwiched by the sandwiching portion 48 in the radial direction A. Also includes a central portion 13 located inside and a peripheral edge portion 14 located outside the position sandwiched by the sandwiching portion 48 in the radial direction A.

The top surface 3a of the elastic valve body 3 includes a central top surface region 15 of the central portion 13 and a constriction top surface region 16 of the constriction portion 12 located outside the central top surface region 15 in the radial direction A. It is composed of a peripheral edge portion top surface region 17 of a peripheral edge portion 14 located further outside in the radial direction A than the constricted portion top surface region 16.

As shown in FIGS. 4 to 7, the central top surface region 15 is more outward than the constricted top surface region 16 and the peripheral top surface region 17 in the thickness direction B of the elastic valve body 3 (FIGS. 6, FIG. At the position (upper side of FIG. 7), it has a central plane portion 18 formed of a plane orthogonal to the thickness direction B.

The above-mentioned slit 11 in the shape of a single character is formed in the center of the central plane portion 18. The slit 11 is mold-molded and does not penetrate to the bottom surface 3b at the time of molding, and penetrates to the bottom surface 3b at the time of inserting, for example, the first male connector 100 (see FIG. 14) after mold molding. It has a structure. It is also possible to execute the step of penetrating the slit 11 as a part of the manufacturing step after the mold molding is completed.

Further, as shown in FIG. 5A, in the central top surface region 15, the elastic valve body 3 is not accommodated in the insertion opening 5 (see FIG. 3), and the slit 11 is in the longitudinal direction (FIG. 5 (FIG. 3). It is formed in an elliptical shape having a minor axis on the vertical direction in a) and a major axis in a direction orthogonal to the longitudinal direction of the slit 11 (horizontal direction in FIG. 5A). When the elastic valve body 3 is accommodated in the insertion opening 5, the constricted portion ceiling described later is provided in the long axis direction of the ellipse of the central top surface region 15 (the direction orthogonal to the longitudinal direction of the slit 11 in FIG. 5A). The side wall portion 19 of the surface region 16 is pressed by the inner wall 42 (see FIG. 3) that partitions the insertion opening 5 of the top surface cap 9. As a result, the outer shape of the central top surface region 15 is deformed from an elliptical shape to a circular shape by accommodating the elastic valve body 3 in the insertion opening 5. Further, with this deformation, the inner surfaces of the slits 11 are brought into close contact with each other and closed. In addition, in FIGS. 1 to 3 and the like, the slit 11 is not drawn as a state of being in close contact with each other in order to facilitate understanding of the configuration, but in reality, the inner surfaces are in a state of being in close contact with each other and closed. There is.

Here, as shown in FIGS. 4 to 7, the central top surface region 15 includes a curved surface portion 20 that connects the outer edge of the central plane portion 18 and the side wall portion 19 described later, in addition to the above-mentioned central plane portion 18. Have. Specifically, the curved surface portion 20 has an arc shape in a cross-sectional view of a cross section orthogonal to the longitudinal direction of the slit 11 (for example, the cross section shown in FIG. 7A), and the curved surface portion 20 has a central plane via the curved surface portion 20. The portion 18 and the side wall portion 19 are connected. By providing the curved surface portion 20 in this way, the inserted male connector 100 (see FIG. 14) is removed while the elastic valve body 3 is attached to the housing 2, and the inside of the housing 2 (see FIG. 1 and the like) is removed. When the elastic valve body 3 pushed into the position returns to a predetermined position due to the restoring force, the top surface 3a of the elastic valve body 3 is located on the inner wall 42 of the housing 2 located near the entrance of the insertion opening 5 (see FIG. 3). It becomes difficult to get caught in. Further, in the present embodiment, as shown in FIG. 5A, in the long axis direction of the elliptical central top surface region 15, the curved surface portion 20 extending to a position far from the slit 11 is longer in the same direction. The L is long. Of the outer edges of the central plane portion 18 of the central top surface region 15, the outer edge of the elliptical central top surface region 15 at a position farther from the slit 11 in the long axis direction, the more the elastic valve body 3 has a restoring force. Therefore, when returning to a predetermined position, it is likely to be caught by the inner wall 42 of the housing 2. However, if the relationship of the length L is made as described above, it is possible to make it difficult to get caught even at the outer edge located at a position far from the slit 11.

As shown in FIG. 7B, in the present embodiment, when the elastic valve body 3 is viewed in a cross section parallel to the longitudinal direction of the slit 11 including the slit 11, arcs are formed at both ends of the central plane portion 18. The curved surface portion 20 of the shape is not provided, and the central plane portion 18 and the side wall portion 19 described later are directly connected at a substantially right angle. However, the curved surface portion 20 may be provided over the entire outer edge of the central flat surface portion 18, that is, the elastic valve body 3 may be provided so as to surround the periphery of the central flat surface portion 18 when viewed from the top surface 3a side. ..

As shown in FIGS. 5 and 7, the peripheral edge portion top surface region 17 of the peripheral edge portion 14 includes a peripheral plane portion 21 formed of an annular plane orthogonal to the thickness direction B.

The constricted top surface region 16 of the constricted portion 12 has an annular side wall portion 19 continuous with the central top surface region 15 described above, an annular side wall portion 22 continuous with the peripheral top surface region 17 described above, and a radial direction. A includes an annular bottom portion 24 located between the side wall portion 19 and the side wall portion 22. In other words, the constricted top surface region 16 is a top surface annular groove 23 having the side wall portion 19 and the side wall portion 22 as opposite annular groove walls and the annular bottom portion 24 as the groove bottom. The locking projection 41 (see FIG. 8) of the top surface cap 9 described later enters the top surface annular groove 23 and comes into contact with the annular bottom portion 24, together with the locking projection 45 (see FIG. 8) of the bottom surface cap 10 described later. , The elastic valve body 3 is compressed to form the sandwiching portion 48.

The side wall portion 19 is a cylindrical side wall main body 19a that is continuous with the central top surface region 15 and extends in the thickness direction B in a cross-sectional view of the elastic valve body 3 along the thickness direction B (see FIG. 7). And an arc-shaped tapered portion 19b that is continuous with the side wall main body portion 19a and extends outward in the radial direction A toward the bottom surface 3b side in the thickness direction B. In other words, the tapered portion 19b is an inclined annular surface in which the diameter in the radial direction A gradually increases toward the bottom surface 3b side in the thickness direction B. By providing the tapered portion 19b on the side wall portion 19, the elastic valve body 3 is restored when the male connector 100 (see FIG. 14) is removed, as compared with the case where the side wall portion 19 is composed of only the side wall main body portion 19a. Performance can be improved.

Further, the side wall portion 22 has a tapered shape that is continuous with the inner edge of the peripheral surface portion 21 of the peripheral edge portion top surface region 17 and whose diameter in the radial direction A gradually decreases toward the bottom surface 3b side in the thickness direction B. There is. Although the side wall portion 22 extends in a curved shape in the cross-sectional view shown in FIG. 7, it may be configured to extend in a straight line in the same cross-sectional view. Further, the side wall portion 22 of the present embodiment has a configuration in which the diameter in the radial direction A gradually decreases toward the bottom surface 3b side in the thickness direction B, but the side wall portion 22 may have a cylindrical shape parallel to the thickness direction B. However, as in the present embodiment, if the side wall portion 22 has a tapered shape in which the diameter in the radial direction A gradually decreases toward the bottom surface 3b side in the thickness direction B orthogonal to the peripheral flat surface portion 21, the elastic valve body. When assembling 3, the side wall 19 is further inserted into the opening 5 (FIG. 8) so that the locking projection 41 (see FIG. 8) of the top cap 9 described later comes into contact with the side wall 19 by the side wall 22. Since the elastic valve body 3 is guided so as to be pressed to the side (see), the position of the elastic valve body 3 sandwiched by the sandwiching portion 48 (see FIG. 3) in the radial direction A is suppressed. Further, the locking projection 41 of the top surface cap 9 is guided by the side wall portion 22 so as to come into contact with the side wall portion 19 and further press the side wall portion 19 inward in the radial direction A, so that it is elastic. When the valve body 3 is sandwiched by the sandwiching portion 48, the portion compressed by the sandwiching portion 48 is pushed out to the insertion opening 5 side to prevent slackening from occurring on the bottom surface side of the central portion 13 of the elastic valve body 3. Can be done.

The bottom surface 3b of the elastic valve body 3 includes a central bottom surface region 25 of the central portion 13, a constricted bottom surface region 26 of the constricted portion 12 located outside the central bottom surface region 25 in the radial direction A, and the constricted portion. It is composed of a peripheral edge portion bottom surface region 27 of a peripheral edge portion 14 located further outside in the radial direction A than the bottom surface region 26.

The central bottom surface region 25 is located outside the central plane portion 28 on the bottom surface 3b side, which is a plane parallel to the central plane portion 18 on the top surface 3a side, and in the radial direction A from the central plane portion 28, and is in the center. It is provided with a central protruding portion 29 that protrudes outward (downward in FIGS. 6 and 7) in the thickness direction B from the flat surface portion 28.

Although the slit 11 is not formed in the central flat surface portion 28 on the bottom surface 3b side, as described above, for example, when the first male connector 100 (see FIG. 14) is inserted, the elastic valve body 3 is on the top surface 3a side. The slit 11 is formed from the central plane portion 18 on the top surface 3a side to the bottom surface 3b side by tearing the portion between the tip portion of the slit 11 formed in the central plane portion 18 and the central plane portion 28 on the bottom surface 3b side. It communicates with the central plane portion 28. Note that FIG. 5B shows the position of the slit 11 on the top surface 3a side with a broken line for convenience of explanation.

Since the central projecting portion 29 projects outward from the central flat surface portion 28, the thickness of the central flat surface portion 18 on the top surface 3a side and the central flat surface portion 28 on the bottom surface 3b side is larger than the wall thickness in the thickness direction B. The wall thickness in the thickness direction B between the central plane portion 18 on the top surface 3a side and the top of the central protrusion 29 is thicker. In the case of a configuration in which the central protrusion 29 is not provided, when an excessive load is applied to the elastic valve body 3 when inserting or removing the male connector 100, or when the male connector 100 is repeatedly inserted and removed. In addition, there is a problem that the longitudinal end portion of the bottom surface 3b side of the communicating slit 11 is torn, but the longitudinal end portion of the slit 11 is reinforced by providing the central protrusion 29, which causes the above-mentioned problem. It can be suppressed. In the present embodiment, when the elastic valve body 3 is viewed from the bottom surface 3b side, an annular central projecting portion 29 is formed so as to surround the central flat surface portion 28, and among them, the slit 11 formed on the top surface 3a. The wall thickness of the portion corresponding to both sides in the longitudinal direction is formed to be the thickest. With such a configuration, it is possible to suppress tearing of the end portion of the penetrating slit 11 in the longitudinal direction, and to achieve both good male connector insertability of the elastic valve body 3 and maintenance of elastic restoring force. It will be possible.

Further, on the side wall portion 30 outside the radial direction A of the central protrusion 29, a surface substantially parallel to the thickness direction B in the cross-sectional view along the thickness direction B and a thickness direction in the cross-sectional view along the thickness direction B. Surfaces inclined with respect to B are alternately formed in the circumferential direction C. Specifically, as shown in FIG. 7A, in the side wall portion 30 of the central protrusion 29, in the direction orthogonal to the longitudinal direction of the slit 11 with respect to the slit 11 (the minor axis direction in FIG. 5B). The located portion is composed of a plane substantially parallel to the thickness direction B. Further, as shown in FIG. 7B, the portion of the side wall portion 30 of the central protrusion 29 located in the longitudinal direction of the slit 11 (the long axis direction in FIG. 5B) with respect to the slit 11 is thick. It is composed of a surface whose diameter in the radial direction A gradually increases toward the top surface 3a in the longitudinal direction B.

As shown in FIG. 7, the peripheral surface portion bottom surface region 27 includes a planar peripheral surface portion 31 substantially orthogonal to the thickness direction B.

The constricted bottom surface region 26 of the constricted portion 12 includes the side wall portion 30 of the central protruding portion 29 described above, the annular side wall portion 32 continuous with the peripheral surface bottom surface region 27 described above, and the side wall portion 30 and the side wall portion in the radial direction A. It comprises an annular bottom 34 located between 32. In other words, the constricted bottom surface region 26 is a bottom surface annular groove 33 having the side wall portion 30 and the side wall portion 32 as opposite annular groove walls and the annular bottom portion 34 as the groove bottom. The locking projection 45 (see FIG. 8) described later of the bottom cap 10 enters the bottom annular groove 33 and comes into contact with the annular bottom 34, together with the locking projection 41 (see FIG. 8) described later of the top cap 9. The elastic valve body 3 is compressed to form the sandwiching portion 48.

As described above, the side wall portion 30 of the present embodiment is composed of the outer peripheral surface on the outer side in the radial direction A of the central protruding portion 29, but the present invention is not limited to this configuration, and the radial direction A of the central protruding portion 29 is not limited. It may be a side wall portion formed separately from the outer outer peripheral surface.

The side wall portion 32 has a configuration extending in the thickness direction B in the cross-sectional view of FIG. 7, but may have a configuration in which the diameter in the radial direction A gradually decreases toward the top surface 3a side in the thickness direction B. With such a configuration, as will be described later, when the elastic valve body 3 is assembled, the locking projection 45 (see FIG. 8) of the bottom cap 10 is brought into contact with the side wall portion 30 by the side wall portion 32. Further, the side wall portion 30 is guided so as to be pressed, and the position of the elastic valve body 3 sandwiched by the sandwiching portion 48 (see FIG. 3) in the radial direction A is suppressed. Further, the locking projection 45 of the bottom surface cap 10 is guided by the side wall portion 32 so as to come into contact with the side wall portion 30 and further press the side wall portion 30 inward in the radial direction A, so that the elastic valve body 3 Is sandwiched by the sandwiching portion 48 (see FIG. 3), the portion compressed by the sandwiching portion 48 flows to the insertion opening 5 side, and slack occurs on the bottom surface 3b side of the central portion 13 of the elastic valve body 3. It can be further suppressed.

As shown in FIGS. 4 to 7, the outer edge in the radial direction A of the peripheral edge top surface region 17 on the top surface 3a of the elastic valve body 3 and the outer edge in the radial direction A of the peripheral edge bottom surface region 27 on the bottom surface 3b. Is connected together with the top surface 3a and the bottom surface 3b by an annular side wall portion 35 constituting the outer wall of the elastic valve body 3. As shown in FIGS. 6 and 7, the side wall portion 35 of the present embodiment is composed of an outer peripheral surface parallel to the thickness direction B.

[Top cap 9]
FIG. 8 is an enlarged cross-sectional view showing a state in which the elastic valve body 3 described above is sandwiched between the top surface cap 9 and the bottom surface cap 10. Hereinafter, the configurations of the top surface cap 9, the bottom surface cap 10, and the holder 8 will be described with reference to FIGS. 3 and 8.

As shown in FIG. 3, the top surface cap 9 includes a substantially cylindrical hollow cylinder portion 36 and a flange portion 37 provided on one end side of the hollow cylinder portion 36. Further, as shown in FIG. 8, the other end side of the hollow cylinder portion 36 is in a direction orthogonal to the insertion direction D of the male connector 100 and the removal direction E which is the opposite direction of the insertion direction D (thickness of the elastic valve body 3). It is a flat upper end surface 38 extending in a direction (the same direction as the direction orthogonal to the longitudinal direction B). The upper end surface 38 includes a substantially circular edge 39 that partitions one end of the insertion opening 5 into which the male connector 100 is inserted from the outside. A thread 40 is formed on the outer peripheral surface of the hollow cylinder portion 36 so that it can be screwed with the lock connector defined by ISO 594. The flange portion 37 is a portion molded integrally with the hollow tubular portion 36, and the top surface cap 9 is held by the holder 8 when the flange portion 37 engages with the holder 8 described later.

As shown in FIG. 8, in the vicinity of the edge 39 of the inner wall of the hollow tubular portion 36, the male connector 100 projects in the insertion direction D, and the top surface annular groove 23 of the elastic valve body 3 described above (see FIG. 7). ), And the locking protrusion 45 of the bottom cap 10 and the locking protrusion 41 for compressing the elastic valve body 3 are provided. The annular inner wall 42 (see FIG. 3) of the top cap 9 formed between the edge 39 and the locking projection 41 has a side wall portion 19 of the elastic valve body 3 described above when the male connector 100 is not inserted. It is configured to be in contact with (see FIG. 7 and the like) and to be in contact with the male connector 100 when the male connector 100 is inserted (see FIG. 14). That is, in the state where the male connector 100 is not inserted, the side wall portion 19 (see FIG. 7 and the like) of the constricted portion 12 of the elastic valve body 3 and the central plane portion 18 (see FIG. 7 and the like) of the central portion 13 are formed by the inner wall 42. It fits into a substantially cylindrical space surrounded by the male connector 100, and when the male connector 100 is inserted, the male connector 100 is fitted with the top surface cap 9 by a cylindrical inner wall 42. The inner wall 42 in the present embodiment has a cylindrical shape parallel to the insertion direction D, but may have a tapered shape in which the inner diameter gradually decreases toward the insertion direction D according to the outer shape of the male connector 100. Good.

[Bottom cap 10]
As shown in FIG. 3, the bottom surface cap 10 includes a substantially cylindrical hollow cylinder portion 43 and a flange portion 44 provided on one end side of the hollow cylinder portion 43, similarly to the top surface cap 9. The other end side of the hollow tubular portion 43 protrudes toward the removal direction E of the male connector 100, enters the bottom annular groove 33 (see FIG. 7 and the like) of the elastic valve body 3 described above, and engages with the top surface cap 9. A locking protrusion 45 that compresses and holds the elastic valve body 3 together with the stop protrusion 41 is provided (see FIG. 8).

The bottom surface cap 10 is held by the top surface cap 9 by being ultrasonically bonded to the inner surface of the hollow tubular portion 36 of the top surface cap 9 and / or the lower surface of the flange portion 37 (lower surface in FIG. 3), and further, the bottom surface cap 10. The position is fixed by supporting the flange portion 44 of 10 by a holder 8 described later.

[Holder 8]
As shown in FIG. 3, the holder 8 supports the top surface cap 9 and the bottom surface cap 10 and partitions the flow path 6 inside the top surface cap 9 and the bottom surface cap 10. The holder 8 of the present embodiment supports both by directly contacting the top surface cap 9 and the bottom surface cap 10, but for example, the holder 8 does not contact the top surface cap 9 and directly contacts only the bottom surface cap 10. The top surface cap 9 may be in contact with and support the bottom surface cap 10. That is, the holder 8 may be configured to directly contact and support one of the top surface cap 9 and the bottom surface cap 10 and not to directly contact the other. It is preferable that the members that come into direct contact with each other are bonded to each other by, for example, ultrasonic bonding.

Further, as will be described in detail later, when the male connector 100 is inserted into the connector 1, the tip portion 101 (see FIG. 14) of the male connector 100 enters the flow path 6 or its vicinity through the insertion opening 5. The liquid flow path in the male connector 100 and the flow path 6 of the holder 8 communicate with each other.

Further, as shown in FIG. 3, the holder 8 in the present embodiment has a substantially cylindrical outer cylinder portion 46 provided with a thread for a lock connector on the inner peripheral surface, and a hollow portion for partitioning the outer cylinder portion 46. However, the shape of the holder 8 is not limited to that of the male lure portion 47 provided in the holder 8, and various holders can be used, which can be appropriately changed according to the intended use of the user. For example, a connector 110 having a holder 80 as shown in FIG. 9 can be mentioned. The holder 80 includes a holder main body 61 formed of a substantially cylindrical housing having a hollow portion inside, and a cylindrical upstream port portion 62 and a downstream port portion 63 protruding from the outer peripheral surface of the holder main body 61. The hollow inside the holder body 61 is responsible for a part of the liquid flow path 64 extending from the upstream port portion 62 to the downstream port portion 63. Further, a top surface cap 9 and a bottom surface cap 10 are supported on the outer wall of the holder 80. The holder 80 shown in FIG. 9 is different from the holder 8 in the shape of the internal liquid flow path and the outer shape of the liquid flow path, but the elastic valve body 3, the top surface cap 9, and the bottom surface cap 10 are described above. The same one can be used.

Furthermore, in addition to the holder 80 described above, the holder 800 as shown in FIG. 10 can be used instead of the holder 8. FIG. 10 shows a three-way stopcock as the connector 120. The holder 800 in this three-way stopcock sandwiches a substantially cylindrical holder body 602 for accommodating the cock 601 inside, a substantially cylindrical upstream port portion 603 provided on the outer wall of the holder body 602, and a holder body 602. The holder body is located on the outer wall of the holder body 602 at a position opposite to the upstream port part 603, at a position different from the positions of the substantially cylindrical downstream port part 604 and the upstream port part 603 and the downstream port part 604. A branch port portion 605 provided on the outer wall of the 602 is provided. A liquid flow path 606 as shown by an arrow in FIG. 10 can be formed inside the holder 800. The elastic valve body 3, the top surface cap 9, and the bottom surface cap 10 are provided at the end of the branch port portion 605 of the holder 800 shown in FIG. 10, and are supported by the holder 800.

Here, in the present embodiment, the elastic valve body 3 is sandwiched between the top surface cap 9 and the bottom surface cap 10 of the cap 7, but the configuration is not limited to this. For example, the bottom cap 10 and the holder 8 are composed of a single member, the holder 8 itself has the function of the bottom cap 10, and the top cap 9 and the holder 8 constituting the cap 7 form an elastic valve body. 3 may be sandwiched. Further, the shape of the holder 80 may be used instead of the shape of the holder 8, and the bottom cap 10 and the holder 80 may be composed of a single member, or the shape of the holder 800 may be used instead of the shape of the holder 8. May be used to form the bottom cap 10 and the holder 800 as a single member.

[Pinching portion 48 for sandwiching the elastic valve body 3]
The housing 2 (see FIG. 3) includes a holding portion 48 that contacts the top surface 3a and the bottom surface 3b of the elastic valve body 3 and holds the elastic valve body 3. Hereinafter, the sandwiching portion 48 will be described in detail.

As shown in FIG. 8, the elastic valve body 3 is attached so as to close the insertion opening 5 partitioned by the hollow tubular portion 36 of the top surface cap 9 and the hollow tubular portion 43 of the bottom cap 10. Specifically, the sandwiching portion 48 composed of the locking projection 41 and the locking projection 45 comes into contact with the top surface 3a and the bottom surface 3b of the elastic valve body 3 to compress and sandwich the elastic valve body 3. The position of the elastic valve body 3 in the insertion opening 5 is fixed. More specifically, the locking projection 41 of the top cap 9 enters the top annular groove 23 (see FIG. 7 and the like) of the elastic valve body 3, and the locking projection 45 of the bottom cap 10 is the elastic valve body 3. It enters the bottom annular groove 33 (see FIG. 7 and the like). Then, the elastic valve body 3 is compressed in the thickness direction B by both the locking projections 41 and 45 at the positions of the annular bottom 24 (see FIG. 7 and the like) on the top surface 3a and the annular bottom 34 on the bottom surface 3b. , A sandwiching portion 48 for sandwiching the elastic valve body 3 is formed. As a result, the position of the elastic valve body 3 in the insertion opening 5 is fixed. The constricted portion 12 of the elastic valve body 3 in the present embodiment has a thickness of about 1.0 mm in the thickness direction B in the state before being sandwiched by the sandwiching portion 48, but the compression of the sandwiching portion 48 is performed. Is compressed until it becomes thin (for example, 0.2 to 0.3 mm) so that it cannot be elastically deformed in the thickness direction B. However, this amount of compression is an example, and can be appropriately changed according to the shape and size of the elastic valve body. Hereinafter, the portion of the constricted portion 12 that is sandwiched by the sandwiching portion 48 will be referred to as the “held portion 12a”.

As shown in FIG. 8, the housing 2 partitions a storage space S for accommodating the peripheral edge portion 14 in a state where the elastic valve body 3 is sandwiched by the sandwiching portion 48. Specifically, a part of the inner wall of the top surface cap 9 of the housing 2 and a part of the outer wall of the bottom surface cap 10 partition the accommodation space S.

Further, the holding portion 48 in the present embodiment is provided over the entire circumferential direction C (see FIG. 5) of the elastic valve body 3 when the elastic valve body 3 is viewed from the top surface 3a side. , It may be configured to be provided only in a part of the circumferential direction C, such as being arranged at predetermined intervals in the circumferential direction C by a comb-shaped protrusion. However, if the sandwiching portion 48 is provided in the entire circumferential direction C as in the present embodiment and is configured to be in contact with the top surface 3a and the bottom surface 3b of the elastic valve body 3 in the entire circumferential direction C, the sandwiching portion is configured in the circumferential direction C. The constricted portion 12 and the peripheral portion 14 of the elastic valve body 3 move to the insertion opening 5 side with respect to the repeated insertion and removal of the male connector 100 as compared with the configuration provided only in a part of the above. Can be suppressed.

Here, the holding portion 48 comes into contact with the top surface side holding portion 49 that contacts the top surface 3a of the elastic valve body 3 and the bottom surface 3b of the elastic valve body 3, and the elastic valve body 3 together with the top surface side holding portion 49. It is composed of a bottom side holding portion 50 that holds the above. Further, the holding portion 48 is provided in a substantially circular shape so as to surround the slit 11 when the elastic valve body 3 is viewed from the top surface 3a side. The top surface side holding portion 49 in the present embodiment means the tip portion of the tip end portion of the locking projection 41 of the top surface cap 9 in contact with the top surface 3a, which is located on the most insertion direction D side. .. Further, the bottom surface side holding portion 50 in the present embodiment means the tip portion of the tip end portion of the locking projection 45 of the bottom surface cap 10 in contact with the bottom surface 3b, which is located on the most removal direction E side. Further, when the elastic valve body 3 is viewed from the top surface 3a side, the top surface side holding portion 49 and the bottom surface side holding portion 50 are placed on a virtual plane when the elastic valve body 3 is viewed from the top surface 3a side. It means the case of projection, and does not mean whether or not it can be actually seen.

As shown in FIG. 8, the bottom surface side holding portion 50 is located outside the top surface side holding portion 49 in the radial direction A. In other words, the diameter W2 of the bottom surface side holding portion 50 is longer than the diameter W1 of the top surface side holding portion 49. When viewed from the top surface 3a side, both the top surface side holding portion 49 and the bottom surface side holding portion 50 are arranged in a concentric circle in which the center points substantially coincide with each other, so that W1 and W2 satisfy the above relationship. If so, the point on the circumference forming the diameter W1 of the top surface side holding portion 49 is more centered than the point on the circumference forming the diameter W2 of the top surface side holding portion 49 in the radial direction A. It has a structure close to.

As described above, the top surface side holding portion 49 of the present embodiment is the tip end portion of the locking projection 41 of the top surface cap 9 that comes into contact with the top surface 3a and is located most on the insertion direction D side. .. However, in the locking projection 41 of the present embodiment, the tip located closest to the insertion direction D is formed by a flat surface, that is, a tip surface. In other words, the locking projection 41 of the present embodiment has two or more points located most on the insertion direction D side. It should be noted that the locking projections that form the bottom surface side holding portion may also have two or more points located on the E side in the removal direction. In such a case, the positional relationship between the top surface side holding portion 49 and the bottom surface side holding portion 50 in the radial direction A is the point of the top surface side holding portion 49 located on the most central side in the radial direction A and the bottom surface side. This is performed according to the positional relationship with the point located on the most central side in the radial direction A of the sandwiching portions 50. That is, in the present embodiment, "the bottom surface side holding portion 50 is located outside the top surface side holding portion 49 in the radial direction A" means that the tip of the locking projection 45 is located on the most removing direction E side. Of these, the point Q located on the most central side in the radial direction A is radially A than the point P located on the most central side in the radial direction A among the tips located on the most insertion direction D side of the locking projection 41. It means that it is located on the outside of. Since the tip of the locking projection 45 of the present embodiment located on the most removal direction E side is only one apex, this apex is the point Q.

Further, in the present embodiment, the above-mentioned "diameter W1 of the top surface side holding portion 49" means the diameter of the circle composed of the points P, and the above-mentioned "diameter W2 of the bottom surface side holding portion 50" is , It shall mean the diameter of the circle composed of the points Q. As will be described later, the position of the point P in the radial direction A of the present embodiment is the circumferential direction of the hollow tubular portion 36 of the top surface cap 9 (in FIG. 8, the same direction as the circumferential direction C of the elastic valve body 3 and the bottom surface. It varies depending on the position of the hollow cylinder portion 43 of the cap 10 (in the same direction as the circumferential direction), but the above-mentioned "diameter W1 of the top surface side holding portion 49" is a point P located most inside the radial direction A. It shall mean the diameter of the circle formed.

Compared with the configuration in which the bottom surface side holding portion 50 is arranged outside the top surface side holding portion 49 in the radial direction A, the bottom surface side holding portion is arranged inside the top surface side holding portion in the radial direction A. The bottom side holding portion 50 can make it difficult to prevent the male connector 100 (see FIG. 14) from being inserted into the insertion opening 5. Therefore, the operability at the time of inserting the male connector 100 can be improved.

As a result of repeated diligent studies, the present inventor has come to the conclusion that the following problems are likely to occur by arranging the bottom surface side holding portion 50 outside the top surface side holding portion 49 in the radial direction A. .. The problem is that when the bottom surface side holding portion 50 is arranged outside the top surface side holding portion 49 in the radial direction A, the bottom surface side holding portion is arranged inside the top surface side holding portion in the radial direction A. Then, when the male connector 100 is inserted, the peripheral edge portion 14 of the elastic valve body 3 easily falls off to the insertion opening 5 side through the sandwiching portion 48. Hereinafter, this problem will be described with reference to FIG.

FIG. 16 is a cross-sectional view showing a medical connector 200 as a comparative example. FIG. 16 shows a state when the male connector 100 is inserted into the insertion opening 205 of the medical connector 200 as a comparative example. As shown in FIG. 16, when the male connector 100 is inserted, the central portion 213 of the elastic valve body 203 is pushed in the insertion direction D. Due to the deformation of the central portion 213 of the elastic valve body 203, the constricted portion 212 and the peripheral portion 214 of the elastic valve body 203 are pulled toward the insertion opening 205 side through the sandwiching portions 248. At this time, as shown in FIG. 16, the male connector 100 may be inserted at an angle with respect to the central axis O of the housing 202 that partitions the insertion opening 205. In such a case, if the bottom surface side holding portion 250 is arranged outside the top surface side holding portion 249 in the radial direction A, the bottom surface side holding portion is arranged inside the top surface side holding portion in the radial direction A. Compared with the configuration, the holding state of the elastic valve body 203 is changed from the holding between the top side holding portion 249 and the bottom side holding portion 250 to the tip portion 101 and the bottom side holding portion 250 of the male connector 100 being inserted. It is easy to switch to sandwiching between. When the elastic valve body 203 is inserted between the tip portion 101 of the male connector 100 and the bottom side sandwiching portion 250 and the male connector 100 is inserted into the insertion opening 205, the elastic valve body 203 is constricted. The portion 212 and the peripheral portion 214 easily fall out to the insertion opening 205 side through the sandwiching portion 248. That is, the elastic valve body 203 is likely to fall off from the housing 202.

On the other hand, in the connector 1 shown in FIG. 8, the top surface side holding portion 49 and the bottom surface side holding portion 50 are larger than the distance H1 in the insertion direction D between the top surface side holding portion 49 and the bottom surface side holding portion 50. The distance H2 in the radial direction A between the two is increased. As a result, it is possible to prevent the elastic valve body 3 from falling off from the housing 2 when the male connector 100 is inserted. Specifically, by setting the distance relationship H1 <distance H2, it is possible to prevent the switching of the holding state described with reference to FIG. 16 from occurring, and as a result, the elastic valve body 3 falls off from the housing 2. Can be suppressed.

In the present embodiment, the "distance H1 in the insertion direction D between the top surface side holding portion 49 and the bottom surface side holding portion 50" refers to the distance in the insertion direction D between the above-mentioned points P and Q. Means. Further, the "distance H2 in the radial direction A between the top surface side holding portion 49 and the bottom surface side holding portion 50" in the present embodiment means the distance in the radial direction A between the above-mentioned points P and Q. Means.

Further, as described above, the top surface side holding portion 49 of the present embodiment is the tip surface located on the most insertion direction D side among the tip portions of the locking projections 41 of the top surface cap 9 that come into contact with the top surface 3a. Is. That is, the top surface side holding portion 49 of the present embodiment is the tip surface of the locking projection 41 as an annular projection. Here, FIG. 11 is a perspective view showing a single top surface cap 9. Further, FIG. 12 is a view of the top cap 9 alone as viewed from the lower surface side (lower side of FIG. 11) of the flange portion 37. As shown in FIGS. 11 and 12, the inner edge of the tip surface of the locking projection 41 as the annular projection depends on the position in the circumferential direction F (the same direction as the circumferential direction C of the elastic valve body 3 in FIG. 3 and the like). The positions in the radial direction G (the same direction as the radial direction A of the elastic valve body 3 in FIG. 3 and the like) are different. In other words, the point P (see FIG. 8) indicating the inner edge of the tip surface of the locking projection 41 of the present embodiment is different in the radial direction G depending on the position in the circumferential direction F.

As shown in FIG. 8, the closer the position of the point P is in the radial direction A (the same direction as the radial direction G), the larger the distance in the radial direction A between the point P and the point Q. That is, the distance H2 in the radial direction A between the top surface side holding portion 49 and the bottom surface side holding portion 50 becomes large. Therefore, it becomes easy to realize the above-mentioned length relationship of H1 <H2. That is, it becomes easy to realize a configuration that suppresses the elastic valve body 3 from falling off from the housing 2. However, the closer the position of the point P is in the radial direction A, the more the elastic valve body 3 returns to a predetermined position due to the restoring force when the male connector 100 (see FIG. 14) is removed. The top surface 3a is likely to be caught by the inner edge of the tip surface of the locking projection 41, and may not be restored to a predetermined position. Therefore, in the present embodiment, as shown in FIGS. 11 and 12, the radial direction G of the inner edge of the tip surface of the locking projection 41 as the annular projection (in FIG. 3 and the like, the same direction as the radial direction A of the elastic valve body 3). ) Is different depending on the position in the circumferential direction F (the same direction as the circumferential direction C of the elastic valve body 3 in FIG. 3 and the like), thereby suppressing the elastic valve body 3 from falling off from the housing 2 and elastic. The valve body 3 has a structure that can be easily restored to a predetermined position.

More specifically, as shown in FIGS. 11 and 12, the tip surface of the locking projection 41 as the annular projection has the position of the first end surface portion 41a and the inner edge of the first end surface portion 41a in the radial direction. A second end face portion 41b located inside the G is provided. The first end face portion 41a and the second end face portion 41b are alternately arranged in the circumferential direction F. By arranging the first end face portion 41a and the second end face portion 41b in this way, the elastic valve body 3 (see FIG. 3 etc.) can be prevented from falling off from the housing 2 (see FIG. 3 etc.) at the position in the circumferential direction F. It can be suppressed regardless of the position, and it is easy to restore the elastic valve body 3 to a predetermined position after removing the male connector 100 (see FIG. 14) regardless of the position in the circumferential direction F. That is, it is possible to reduce the variation in the dropout suppression and restoration performance of the elastic valve body 3 depending on the position in the circumferential direction F.

The first end face portion 41a and the second end face portion 41b are both configured by a plane orthogonal to the insertion direction D, and are located at substantially equal positions in the insertion direction D. In other words, the position of the first end surface portion 41a in the insertion direction D is equal to the position of the second end surface portion 41b in the insertion direction D, and both are configured by one continuous plane without a step.

3 and 8 are cross-sectional views at the position of the second end face portion 41b, whereas FIG. 13 is a cross-sectional view at the position of the first end face portion 41a. As shown in FIGS. 11 to 13, a groove 71 penetrating to the tip surface is formed on the inner peripheral surface of the locking projection 41 as an annular projection. The first end surface portion 41a is composed of a portion of the tip surface where the groove bottom 71a of the groove portion 71 is continuous.

Further, a plurality of groove portions 71 are formed in the circumferential direction F, and the second end surface portion 41b is formed by a portion between adjacent groove portions 71 in the circumferential direction F.

As described above, in the present embodiment, the first end surface portion 41a and the second end surface portion 41b are realized by providing a groove portion 71 penetrating to the tip surface on the inner peripheral surface of the locking projection 41 as an annular projection. There is. By doing so, it is possible to easily realize the inner edge of the tip surface whose position in the radial direction G differs depending on the position in the circumferential direction F.

As shown in FIGS. 11 and 13, the groove bottom 71a of the present embodiment is directed toward the tip end surface of the locking projection 41 as an annular projection, and the central axis of the locking projection 41 (insertion opening in the present embodiment). It is the same as the central axis O of the housing 2 that partitions the 5, and more specifically, it is provided with an inclined bottom portion that is inclined so as to be away from the central axis O of the inner wall 42 of the housing 2. More specifically, the groove bottom 71a of the present embodiment is composed of only the inclined bottom portion. Then, one end of the inclined bottom portion on the removal direction E side is made continuous with the inner peripheral surface of the locking protrusion 41 as an annular protrusion or the inner wall 42. That is, in the cross-sectional view of FIG. 13, the groove bottom 71a inclined with respect to the insertion direction D is the inner peripheral surface of the locking projection 41 extending in the insertion direction D, or the inner wall 42 located on the removal direction E side thereof. Continuous. As described above, in the same cross-sectional view (see FIG. 13), the inner peripheral surface of the locking projection 41 extending in the insertion direction D or the inner peripheral surface of the locking projection 41 is located on the removal direction E side and has the same cross section. With respect to the inner wall 42 extending in the insertion direction D in view (see FIG. 13), an inclined bottom portion inclined with respect to the insertion direction D is continuous, not a plane orthogonal to the insertion direction D. As a result, when the elastic valve body 3 is restored after the male connector 100 (see FIG. 14) is removed, the elastic valve body 3 is easily caught by the surface extending in the insertion direction D in the same cross-sectional view (see FIG. 13). The corner portion composed of the plane orthogonal to the direction D is not formed. Therefore, the elastic valve body 3 can be easily restored to a predetermined position as compared with the configuration having such a corner portion.

As described above, the groove bottom 71a in the present embodiment is composed of only the inclined bottom portion. Therefore, as shown in FIG. 13, the groove bottom 71a that is inclined with respect to the insertion direction D is continuous with the first end surface portion 41a that is a plane orthogonal to the insertion direction D. That is, even at one end of the groove bottom 71a on the insertion direction D side, a corner portion composed of a surface extending in the insertion direction D and a surface orthogonal to the insertion direction D is not formed in the same cross-sectional view (see FIG. 13). It has become like. Therefore, it is possible to further prevent the elastic valve body 3 from being caught during restoration.

On the other hand, in the cross section (see FIGS. 3 and 8) including the central axis of the locking projection 41 as the annular projection, passing through the second end surface portion 41b and along the central axis of the locking projection 41, the second end surface The portion 41b is substantially orthogonal to the inner peripheral surface of the locking projection 41. That is, in the same cross-sectional view (see FIGS. 3 and 8), the inner peripheral surface of the locking projection 41 extending in the insertion direction D is continuous with the second end surface portion 41b orthogonal to the insertion direction D. In other words, since there is no groove 71, the inner edge of the second end surface portion 41b is directly continuous with the inner peripheral surface of the locking projection 41. In this way, the inner edge of the second end surface portion 41b can be set as compared with a configuration in which an inclined surface such as the groove bottom 71a described above is interposed between the second end surface portion and the inner peripheral surface of the locking projection. It can be located inside the radial direction A. Therefore, it becomes easy to realize the above-mentioned length relationship of H1 <H2.

In the present embodiment, the distance H1 in the insertion direction D between the top surface side holding portion 49 and the bottom surface side holding portion 50 is set to 0.2 to 0.3 mm as described above. On the other hand, in the present embodiment, the distance H2 in the radial direction A between the top surface side holding portion 49 and the bottom surface side holding portion 50 is set to be larger than 0.3 mm.

As described above, the connector 1 of the present embodiment includes a first end surface portion 41a and a second end surface portion 41b having different positions of inner edges in the radial direction A on the tip surface of the locking projection 41 as an annular projection. .. Therefore, it is possible to suppress the elastic valve body 3 from falling off from the housing 2 and to realize a configuration in which the elastic valve body 3 can be easily restored to a predetermined position.

[Connector 110 with the male connector 100 inserted]
Up to this point, the connector 1 in the state where the male connector 100 is not inserted has been mainly described. Hereinafter, each member of the connector 1 in a state where the male connector 100 is inserted will be described. Note that FIG. 14 is a diagram showing a connector 110 in a state in which the male connector 100 is inserted. Although FIG. 14 shows a connector 110 (see FIG. 9) having the holder 80 described above instead of the holder 8, the connector 1 having the holder 8 may be used, or the connector 120 having the holder 800 shown in FIG. 10 may be used. Good. Further, the connectors 1, 110 and 120 all have the same configuration of the elastic valve body 3, the top surface cap 9, and the bottom surface cap 10. Further, in FIG. 14, of the male connector 100, only the tubular portion inserted into the insertion opening 5 (see FIG. 9) of the connector 110 is shown, but the male connector 100 is a lock type male defined by ISO 594. It may be a connector or a slip-type male connector.

When the male connector 100 is inserted into the connector 110, the tip 101 of the male connector 100 elastically deforms the elastic valve body 3 so as to push it into the connector 110, and the liquid flow path in the holder body 61 through the through slit 11. Reach within or near 64.

The elastic valve body 3 is elastically deformed by inserting the male connector 100, enters between the inner wall of the bottom cap 10 and the outer wall of the male connector 100, and is in close contact with the outer surface of the male connector 100. As a result, the connector 110 and the male connector 100 are liquid-tightly connected, and liquid such as a chemical solution is suppressed from leaking from the connector 110 to the outside.

The tip portion 101 of the male connector 100 abuts against the positioning portion 65 formed on the upper surface of the holder body 61 with the elastic valve body 3 sandwiched between them, and the male connector 100 is positioned in the insertion direction D. Although the elastic valve body 3 is sandwiched between the outer surface of the male connector 100 and the inner wall of the bottom cap 10, the elastic valve body 3 is provided with a slit 11 penetrating the inside of the male connector 100. The liquid flow path is in a state of communicating with the liquid flow path 64 through the slit 11.

[Infusion set 130 including connector 110]
Finally, with reference to FIG. 15, the infusion set 130 including the connector 110, which is one embodiment of the present invention, will be described. Here, the infusion set 130 including the connector 110 using the holder 80 described above will be described, but the shape of the holder can be appropriately changed according to the intended use of the infusion set, and the connector 1 having the holder 8 described above and the connector 1 having the holder 8 described above It is also possible to make an infusion set including a connector 120 having a holder 800.

As shown in FIG. 15, the infusion set 130 includes a bottle needle 131 to be inserted into an infusion bag containing a liquid, a first tube 132 connected to the base of the bottle needle 131 to form a liquid flow path, and a first. The drip tube 133 connected to the downstream side of the liquid flow path of the tube 132, the second tube 134 connected to the drip tube 133 and forming the liquid flow path of the liquid discharged from the drip tube 133, and the second A clamp 135 attached to the outer peripheral surface of the tube 134 and capable of adjusting the flow rate of the liquid passing through the second tube 134, and an end of the second tube 134 located on the downstream side of the liquid flow path from the installation position of the clamp 135. A connector 110 having a holder 80 having an upstream port portion 62 connected to the portion, a third tube 136 connected to the downstream port portion 63 of the connector 110 to form a liquid flow path, and a third tube 136. It includes a locking male connector 137 defined by ISO 594, which is connected to the downstream end of the liquid flow path.

In this infusion set 130, the third tube 136 is configured to connect the connector 110 and the male connector 137, but another connector 110 is added between the connector 110 and the male connector 137. A tube to be connected may also be added. It is also possible to add the number of clamps 135 or to arrange them in different positions, and the components of the infusion set 130 and the positions of the components can be appropriately changed by those skilled in the art according to the intended use of the user. The infusion set 130 is not limited to the configuration of the infusion set 130.

Further, it is preferable that the first to third tubes 132, 134, 136 and each component connected to these tubes are connected by a lock connector.

Since the infusion set 130 includes the connector 110, it is possible to supply a liquid different from the liquid from the infusion bag to which the bottle needle 131 is connected to the infusion line through the connector 110, and each liquid to be supplied into the body can be supplied. Eliminates the need for different infusion lines.

The medical connector and the infusion set according to the present invention are not limited to the configuration specified in the above-described embodiment, and can be variously modified within a range that does not deviate from the gist of the invention described in the claims. Is. In the connector 1 described above, the length relationship of H1 <H2 described above is satisfied at the point P (see FIG. 8) which is the inner edge of the second end surface portion 41b, and the length described above is satisfied at the inner edge of the first end surface portion 41a. Although it does not satisfy the relationship (see FIG. 13), it is not limited to this configuration. That is, not only the inner edge of the second end face portion 41b but also the inner edge of the first end face portion 41a may be configured to satisfy the same length relationship as the above-mentioned length relationship of H1 <H2. However, in order to further suppress the catching of the elastic valve body 3 at the position of the first end face portion 41a at the time of restoration, the inner edge of the first end face portion 41a like the inner edge of the first end face portion 41a of the connector 1 described above. At the position (see point “R” in FIG. 13), the distance H3 in the insertion direction D is preferably greater than or equal to the distance H4 in the radial direction A.

The "top surface cap" used here means a cap that comes into contact with the top surface 3a of the elastic valve body 3. Similarly, the “bottom cap” means a cap that comes into contact with the bottom surface 3b of the elastic valve body 3.

The present invention relates to a medical connector and an infusion set.

1, 110, 120: Medical connector 2: Housing 3: Elastic valve body 3a: Top surface of elastic valve body 3b: Bottom surface of elastic valve body 4: Hollow part 5: Insertion opening 6: Flow path 7: Cap 8: Holder 9: Top surface cap 10: Bottom surface cap 11: Slit 12: Constricted portion 12a: Holded portion 13: Central portion 14: Peripheral portion 15: Central top surface region 16: Constricted portion top surface region 17: Peripheral portion top surface region 18 : Central plane portion 19: Side wall portion 19a: Side wall main body portion 19b: Tapered portion 20: Curved surface portion 21: Peripheral plane portion 22: Side wall portion 23: Top surface annular groove 24: Circular bottom portion 25: Central portion bottom surface region 26: Constricted portion Bottom surface area 27: Peripheral part Bottom surface area 28: Central plane part 29: Central protrusion 30: Side wall part 31: Peripheral plane part 32: Side wall part 33: Bottom ring groove 34: Ring bottom part 35: Side wall part 36: Hollow cylinder part 37 : Flange 38: Upper end surface 39: Edge 40: Thread 41: Locking protrusion (annular protrusion)
41a: First end surface portion 41b: Second end surface portion 42: Inner wall of top surface cap 43: Hollow cylinder portion 44: Flange portion 45: Locking protrusion 46: Outer cylinder portion 47: Osluer portion 48: Holding portion 49: Top surface Side holding part 50: Bottom side holding part 61: Holder body 62: Upstream port part 63: Downstream port part 64: Liquid flow path 65: Positioning part 71: Groove part 71a: Groove bottom (inclined bottom part)
80: 800: Holder 100: Male connector 101: Tip 130: Infusion set 131: Bottle needle 132: First tube 133: Drip tube 134: Second tube 135: Clamp 136: Third tube 137: Male connector 200: Medical connector 202: Housing 203: Elastic valve body 205: Insertion opening 212: Constricted part 213: Central part 214: Peripheral part 248: Holding part 249: Top side holding part 250: Bottom side holding part 601: Cock 602 : Holder body 603: Upstream port portion 604: Downstream port portion 605: Branch port portion 606: Liquid flow path A: Diameter direction of elastic valve body B: Thickness direction of elastic valve body C: Circumferential direction D of elastic valve body: Insertion direction of male connector E: Removal direction of male connector F: Circumferential direction of locking protrusion of top surface cap G: Radial direction of locking protrusion of top surface cap H1: Between top surface side holding portion and bottom surface side holding portion Distance H2 in the insertion direction between: Distance in the radial direction between the top surface side holding portion and the bottom surface side holding portion H3: The point located on the most central side in the radial direction of the first end surface portion and the bottom surface side holding portion Distance in the insertion direction between H4: Distance in the radial direction between the most central point in the radial direction of the first end surface portion and the holding portion on the bottom surface side L: Long axis of the elliptical top surface flat portion Length of curved surface in the direction O: Central axis of the housing P: Point of the tip located on the most insertion direction side of the locking projection of the top surface cap, which is located on the most central side in the radial direction Q: Locking of the bottom surface cap Point R: The most central point in the radial direction among the tips located on the most extraction direction side of the protrusion R: Point S: The most central side in the radial direction among the first end face portions of the locking protrusion of the top surface cap. Containment space W1: Diameter of the top side holding part W2: Diameter of the bottom side holding part

Claims (8)

A housing that separates the insertion opening into which the male connector can be inserted,
An elastic valve body having a slit and closing the insertion opening.
The housing includes a holding portion that contacts the top surface of the elastic valve body and the bottom surface on the opposite side of the top surface to hold the elastic valve body.
The holding portion is provided so as to surround the slit when the elastic valve body is viewed from the top surface side, and the bottom surface side holding portion in contact with the bottom surface is held on the top surface side in contact with the top surface. Located on the outside in the radial direction from the part,
The diameter between the top surface side holding portion and the bottom surface side holding portion rather than the distance between the top surface side holding portion and the bottom surface side holding portion in the insertion direction of the male connector into the insertion opening. distance in the direction is rather large,
The top surface side holding portion is the tip surface of the annular protrusion, and is
A medical connector in which the inner edge of the tip surface of the annular protrusion differs in the radial position depending on the position in the circumferential direction . The tip surface of the annular protrusion includes a first end surface portion and a second end surface portion whose inner edge is located inside the radial direction with respect to the first end surface portion.
The medical connector according to claim 1 , wherein the first end face portion and the second end face portion are alternately arranged in the circumferential direction. A groove portion penetrating to the tip surface is formed on the inner peripheral surface of the annular protrusion.
The medical connector according to claim 2 , wherein the first end surface portion is formed of a portion of the tip surface where the groove bottom of the groove portion is continuous. The medical connector according to claim 3 , wherein the groove bottom includes an inclined bottom portion that inclines so as to move away from the central axis of the annular projection toward the tip surface. A plurality of the groove portions are formed in the circumferential direction.
The medical connector according to claim 3 or 4 , wherein the second end surface portion is formed by a portion between adjacent grooves in the circumferential direction. The medical connector according to claim 5 , wherein the second end surface portion includes the central axis of the annular projection and is substantially orthogonal to the inner peripheral surface in a cross section along the central axis of the annular projection. The housing comprises a cap for partitioning the insertion opening and a holder for partitioning a flow path that supports the cap and communicates with the insertion opening.
The medical connector according to any one of claims 1 to 6 , wherein the cap includes a top surface cap including the top surface side holding portion and a bottom surface cap including the bottom surface side holding portion. An infusion set comprising the medical connector according to any one of claims 1 to 7 and a medical tube to which the medical connector can be connected.

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