JP2020099440A - connector - Google Patents

Abstract

To provide a connector that is capable of reliably preventing an elastic valve body from being detached when the elastic valve body is deteriorated.SOLUTION: A connector 1 includes a connector body 2 including a connection space part 23 for connecting an inlet 21 with an outlet 22 and a cavity 24, an elastic valve body 3 including a mixed injection port 31 and closing an upper end of the cavity 24, and a cap member 4. The elastic valve body 3 is pinched between the connector body 2 and the cap member 3, while protrusions 26, 27 are inserted into through-holes 32a, 32b, and the tips of the protrusions 26, 27 are stored in holes 42a, 42b.SELECTED DRAWING: Figure 2

Description

The present invention relates to a connector used for mixed injection into an infusion line.

BACKGROUND ART Conventionally, a connector is known which is connected in the middle of an infusion line and is used for mixed injection of a drug solution or the like into the infusion line (see, for example, Patent Document 1).

The connector includes an inflow port through which a liquid such as an infusion solution flows from an infusion line, an outflow port through which the liquid flows out to the infusion line, a connection space portion that connects the inflow port and the outflow port, and the connection space. A connector body having a hollow portion communicating with the hollow portion, an elastic valve body closing the upper end portion of the hollow portion, and a cap member for exposing the upper end surface of the elastic valve body while fixing it to the connector body. ing. The mixed injection port communicates with the cavity when the male luer such as the tip of the injection cylinder used for mixed injection is inserted.

In the connector, the elastic valve body is formed of a disc-shaped body, and is provided with an annular constricted portion along a peripheral edge thereof. The cap member is composed of a top cap and a bottom cap both supported by the connector body, and the elastic valve body is sandwiched between the top cap and the bottom cap from above and below the constricted portion.

JP, 2018-130501, A

However, in the connector described in Patent Document 1, the elastic valve element may gradually deteriorate and fall off from the top cap and the bottom cap when the insertion and removal of the distal end portion of the injection cylinder with respect to the mixed injection port are repeated. There is inconvenience.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate such inconvenience and provide a connector capable of reliably preventing the elastic valve body from falling off from the cap member even when the elastic valve body is deteriorated.

In order to achieve such an object, the connector of the present invention is a connector which is connected in the middle of an infusion line and is used for mixed injection into the infusion line, wherein the inflow port into which the liquid flows from the infusion line and the liquid A connector main body including an outlet that flows out to an infusion line, a connection space portion that connects the inlet and the outlet, and a cavity portion that communicates with the connection space portion, and an upper end surface that communicates with the cavity portion. The connector body includes a mixed injection port, a disk-shaped elastic valve body that closes the upper end of the hollow portion, and a cap member that exposes the upper end surface of the elastic valve body and that is fixed to the connector body. A plurality of protrusions are provided along the circumferential direction of the upper end surface of the hollow portion, the elastic valve body is provided with a plurality of through holes through which the protrusions are inserted, and the cap member is the through hole of the elastic valve body. A plurality of holes for accommodating the protrusions protruding from the elastic valve body are sandwiched between the connector body and the cap member in a state where the protrusions are inserted into the through holes. And

In the connector of the present invention, the upper end portion of the cavity is closed by the disk-shaped elastic valve body having the mixed injection port on the upper end surface. The protrusion provided on the upper end surface of the cavity is inserted, and the portion of the protrusion protruding from the through hole is housed in the hole of the cap member. As a result, the elastic valve body is sandwiched between the connector body and the cap member in a state where the protrusion is inserted into the through hole.

Therefore, according to the connector of the present invention, the insertion and removal of the distal end portion of the injection cylinder with respect to the mixed injection port are repeated, and even when the elastic valve body is deteriorated, the elastic valve body is prevented from coming off from the cap member. It can be surely prevented.

In the connector of the present invention, the protrusion may be a solid columnar shape or a solid wall-shaped body having an arc shape in plan view. When the protrusion has a solid columnar shape, the flexibility of deformation of the elastic valve body can be increased when the tip of the injection cylinder is inserted into the mixed injection port. On the other hand, when the protrusion is a solid wall-shaped body, the strength of the protrusion increases, so that when the elastic valve body deteriorates, the elastic valve body is more reliably prevented from falling off the cap member. can do.

Further, it is preferable that the connector of the present invention includes a partition member that is erected on the upstream side of the center of the connection space portion and divides the connection space portion into an upstream side and a downstream side.

In the connector of the present invention, the liquid such as the infusion solution that has flowed in from the infusion line through the inflow port flows out of the connection space portion to the infusion line through the outflow port as it is, except when mixed injection is performed. However, since the hollow portion becomes a dead space that is not affected by the flow of liquid from the inflow port to the outflow port, the liquid such as the infusion liquid may stay in the hollow portion as it once flows into the hollow portion. Is concerned.

However, in the connector of the present invention, by providing the partition member, a liquid such as an infusion solution that has flowed into the compartment on the upstream side of the connection space portion from the infusion line via the inflow port is provided along the surface of the partition member. Are guided to the hollow portion, inverted inside the hollow portion, and flow out from the section on the downstream side of the connection space portion to the infusion line via the outflow port. Therefore, according to the connector of the present invention, by providing the partition member, it is possible to allow the liquid to flow out to the infusion line without causing the liquid to stay in the hollow portion that has conventionally been a dead space.

On the other hand, in the connector of the present invention, when the mixed injection is performed, the tip of the injection cylinder used for the mixed injection is opened to the section on the downstream side of the connection space portion, so that the mixed injection liquid supplied from the injection cylinder can be easily supplied. In addition, it can be mixed with a liquid such as the infusion solution and allowed to flow out to the infusion line through the outflow port.

Further, in the connector of the present invention, the connector main body includes an opening portion that opens to a bottom portion of the connection space portion, and a bottom lid member that closes the opening portion, and the partition member is provided upright on the bottom lid member. Is preferably provided. According to the connector of the present invention, the connector main body and the bottom cover member on which the partition member is erected can be easily manufactured by forming them separately.

The perspective view which shows one structural example of the connector of this invention. Explanatory sectional drawing which shows the II-II sectional view taken on the line of FIG. A is an explanatory sectional view showing a method of using the connector of the present invention, and B is an explanatory sectional view showing a state in which the distal end portion of the injection cylinder is inserted into the mixed injection port of the elastic valve body. The perspective view which shows the other structural example of the connector of this invention.

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIG. 1, the connector 1 of the present embodiment is a medical instrument that is connected in the middle of an infusion line (not shown) and is used for mixed injection of a drug solution or the like into the infusion line, and includes a connector body 2 and an elastic valve body. 3, a cap member 4, and a bottom lid member 5.

The connector body 2 includes an inflow port 21 into which a liquid flows in from an infusion line (not shown), an outflow port 22 in which the liquid flows out into the infusion line, and a connection space portion 23 connecting the inflow port 21 and the outflow port 22. The cavity 24 communicates with the upper part of the connection space 23, and the opening 25 opens at the bottom of the connection space 23. The inflow port 21 and the outflow port 22 are linearly arranged at positions symmetrical to each other on the side surface of the connector body 2. In addition, the hollow portion 24 is provided with a plurality of protrusions, for example, six pins 26 formed of a solid columnar body along the circumferential direction at the upper end edge thereof.

The elastic valve body 3 is made of a flexible elastic body such as disc-shaped silicone rubber, and has a mixed injection port 31 into which a male luer such as a tip portion 6 (see FIG. 3) of a syringe used for mixed injection is inserted and a peripheral portion. It has a through hole 32a having a circular cross section formed corresponding to the pin 26 along the circumferential direction. The mixed injection port 31 has a thin portion between its bottom and the cavity portion 24, and when the tip portion 6 (see FIG. 3) of the injection cylinder used for mixed injection is inserted, the thin portion is cleaved to form a cavity. It may be in communication with the portion 24, or may be one that is not provided with the thin portion and is normally closed, and is in communication with the cavity portion 24 when the distal end portion 6 of the syringe barrel is inserted.

The cap member 4 has an opening 41 that exposes the upper end surface of the disk-shaped elastic valve body 3, and a hole 42a having a circular cross section formed around the opening 41 along the circumferential direction corresponding to the pin 26. I have it. The hole 42a is opened in the bottom surface of the cap member 4 on the elastic valve body 3 side.

The bottom lid member 5 is provided with a partition member 51 that is erected so as to be positioned upstream of the center of the connection space portion 23 when the opening portion 25 is closed, and a plurality of bottom lid members 5 that project from the peripheral portion toward the opening portion 25. And a protruding portion 52 of

In the connector 1, as shown in FIG. 2, the pin 26 formed on the upper end edge of the cavity portion 24 of the connector body 2 is inserted into the through hole 32a of the elastic valve body 3 and protrudes from the through hole 32a at the tip of the pin 26. The portion to be accommodated is accommodated in the hole 42a of the cap member 4, and the tip of the pin 26 is fused to the cap member 4 by ultrasonic fusion or the like. As a result, the disk-shaped elastic valve body 3 is sandwiched between the hollow portion 24 of the connector body 2 and the cap member 4 in a state where the pin 26 is inserted into the through hole 32a.

On the other hand, the opening 25 opening to the bottom of the connection space 23 is closed by the bottom lid member 5, and the connection space 23 is divided into an upstream side section and a downstream side section by the partition member 51 provided upright on the bottom cover member 5. Is divided into At this time, the partition member 51 is located upstream of the center of the connection space portion 23, and the upstream side partition is relatively narrower than the downstream side partition. Further, the bottom cover member 5 is positioned and simultaneously prevented from rotating by the plurality of protrusions 52 engaging with predetermined recesses formed in the connector body 2.

Next, a method of using the connector 1 will be described with reference to FIG.

First, when the mixed injection is not performed, as shown in FIG. 3A, in the connector 1, the distal end portion 6 of the injection cylinder is not inserted into the mixed injection port 31, and the mixed injection port 31 is closed. In this state, the liquid such as the infusion solution that has flowed in from the infusion line through the inflow port 21 flows into the partition on the upstream side of the connection space portion 23, and then on the surface of the partition member 51, as shown by the arrow in FIG. 3A. It is guided to the hollow portion 24 along with it, is inverted inside the hollow portion 24, and flows out from the compartment on the downstream side of the connection space portion 23 to the infusion line via the outflow port 22. Therefore, according to the connector 1, the liquid such as the infusion can be allowed to flow out to the infusion line without accumulating in the cavity portion 24 which is conventionally a dead space.

Next, when performing mixed injection, as shown in FIG. 3B, the tip portion 6 of the injection cylinder is inserted into the mixed injection port 31 of the upper end surface of the elastic valve body 3 exposed from the opening 41 of the cap member 4. The mixed injection port 31 communicates with the hollow portion 24 by inserting the distal end portion 6 of the injection cylinder. At this time, the partition member 51 is located upstream of the center of the connection space portion 23. Therefore, the distal end portion 6 of the injection cylinder is opened to the downstream side compartment which is relatively wider than the upstream side compartment, and the mixed injection liquid supplied from the distal end portion 6 of the injection cylinder is easily exchanged with the liquid such as the infusion solution. It can be mixed and flowed to the infusion line via the outlet 22.

Further, since the elastic valve body 3 has only the pin 26 inserted into the through hole 32a and has a high degree of freedom of deformation, it can be easily extended when the distal end portion 6 of the injection cylinder is inserted into the mixed injection port 31. It enters between the tip 6 and the inner wall of the cavity 24, and when the tip 6 is removed, it returns to its original shape. As a result, the elastic valve body 3 is repeatedly extended and restored to the original shape as described above every time the distal end portion 6 of the injection cylinder is inserted and removed, and is gradually deteriorated.

However, in the connector 1, since the elastic valve body 3 is sandwiched between the hollow portion 24 and the cap member 4 with the pin 26 inserted in the through hole 32a, the cap member 4 is deteriorated even if the elastic valve body 3 deteriorates. It is possible to surely prevent the falling off.

The connector 1 shown in FIG. 1 is provided with six solid columnar pins 26 at the upper end edge of the hollow portion 24 as a protrusion, but instead of the pins 26, the circular arc shape in plan view shown in FIG. For example, four real wall-shaped protrusions 27 may be provided. In this case, the elastic valve body 3 is provided with a through hole 32a having a circular cross section instead of the through hole 32a having a circular cross section, and the cap member 4 is replaced with a hole 42a having a circular cross section. And a hole 42b corresponding to the solid wall-shaped protrusion 27 and having an arcuate shape in a plan view.

The connector 1 shown in FIG. 4 is provided with a solid wall-shaped protrusion 27 having a larger volume than the pin 26 as a protrusion, so that the strength of the protrusion is increased, and even if the elastic valve body 3 deteriorates, the cap member. It is possible to more reliably prevent the dropout from No. 4.

Further, in the connector 1 shown in FIG. 1, the bottom lid member 5 is formed separately from the connector body 2, but the bottom lid member 5 may be formed integrally with the connector body 2.

DESCRIPTION OF SYMBOLS 1... Connector, 2... Connector main body, 3... Elastic valve body, 4... Cap member, 21... Inflow port, 22... Outflow port, 23... Connection space part, 24... Cavity part, 26, 27... Projection part, 31... Mixed injection port, 32a, 32b... Through hole, 42a, 42b... Hole, 51... Partition member.

Claims (5)

A connector which is connected in the middle of an infusion line and is used for mixed injection into the infusion line,
An inflow port through which the liquid flows from the infusion line, an outflow port through which the liquid flows out to the infusion line, a connection space portion that connects the inflow port and the outflow port, and a cavity portion that communicates with the connection space portion. A connector body including
A disc-shaped elastic valve body that has a mixed injection port that communicates with the hollow portion on the upper end surface and closes the upper end portion of the hollow portion,
A cap member for fixing the upper end surface of the elastic valve body to the connector body while exposing the upper end surface of the elastic valve body,
The connector body has a plurality of protrusions along the circumferential direction of the upper end surface of the cavity, the elastic valve body has a plurality of through holes into which the protrusions are inserted, and the cap member has the elastic valve body. A plurality of holes for accommodating the protrusions protruding from the through hole,
The connector, wherein the elastic valve body is sandwiched between the connector body and the cap member in a state where the protrusion is inserted into the through hole. The connector according to claim 1, wherein the protrusion has a solid cylindrical shape. The connector according to claim 1, wherein the protruding portion is a solid wall-shaped body having an arc shape in a plan view. The connector according to any one of claims 1 to 3, further comprising: a partition member that is erected on an upstream side of a center of the connection space portion and divides the connection space portion into an upstream side and a downstream side. A connector provided with. 5. The connector according to claim 4, wherein the connector main body includes an opening opening to the bottom of the connection space, and a bottom lid member closing the opening, and the partition member is provided upright on the bottom lid member. The connector characterized by being.

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