JP2020116339A - connector - Google Patents

Abstract

To provide a connector not having a dead space in which a fluid such as an infusion fluid is accumulated.SOLUTION: A connector connected to the middle of an infusion fluid line and used for mixture injection includes: a connector body 2 having an inflow port 21, an outflow port 22, a connection space 23, and a gimlet-shaped projection member 24; a flexible valve body 3 having a disk-like member 31, a columnar member 32, and a mixed injection port 33; and a cover member 4 for fixing the flexible valve body 3 to the connector body 2. The flexible valve body 3 is bent and closely adhered to the gimlet-shaped projection member 24 when the columnar member 32 is pressed by a tip part 5 of an injection cylinder, and the gimlet-shaped projection member 24 includes a groove part 25 for forming a gap with the flexible valve body 3.SELECTED DRAWING: Figure 4

Description

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

BACKGROUND ART Conventionally, there is known a connector that 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 (for example, see Patent Document 1).

The connector has a connector body including 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, and a connection space portion connecting the inflow port and the outflow port. A flexible bottomed tubular member that is connected to the connector body and forms a mixed injection passage used for mixed infusion to an infusion line; and a cover member that covers the bottomed tubular member and is fixed to the connector body. Prepare

The bottomed tubular member includes a hollow portion that communicates with the connection space portion, and is connected to the connector body in an inverted state so that the bottom surface is located in a direction away from the connection space portion. The bottomed tubular member has a mixed injection port on the bottom surface, and the mixed injection port opens and communicates with the cavity when pressed in the direction of the connection space by the tip of the injection cylinder used for mixed injection. .. As a result, the mixed injection port and the hollow portion form a mixed injection passage for guiding the drug solution or the like injected from the injection cylinder to the connection space portion.

JP 2004-209278 A

In the connector described in Patent Document 1, a liquid such as an infusion solution that has flowed in from the infusion line via the inflow port flows out of the connection space portion to the infusion line via 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 the liquid from the inflow port to the outflow port, the liquid such as the infusion solution once stays in the hollow portion once it has flowed into the hollow portion. There is inconvenience.

It is an object of the present invention to eliminate such an inconvenience and provide a connector having no dead space in which a liquid such as the infusion solution stays.

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 body having an outflow port flowing out to an infusion line, a connection space part connecting the inflow port and the outflow port, and a conical projection member standing upright at the center of the bottom surface of the connection space part, and a disk-shaped member. And a columnar member standing upright in the center of the disc-shaped member, and when the columnar member formed along the axial direction of the columnar member is pressed in the direction of the connection space by the tip of the injection cylinder. A flexible valve body having a mixed injection port that communicates with the connection space by inserting the conical protrusion member; and a cover member that covers the flexible valve body and fixes it to the connector body. The flexible valve body bends when the columnar member is pressed in the direction of the connection space by the tip of the injection cylinder, and the conical shape is formed at the boundary between the disc-shaped member and the columnar member. The pyramidal projection member is closely attached to the outer peripheral surface of the projecting member, and the conical projecting member has a plurality of groove portions along the axial direction on the outer peripheral surface, and the groove portions form a gap with respect to the boundary portion between the disk-shaped member and the columnar member. It is characterized by doing.

In the connector of the present invention, since the flexible valve body includes the disc-shaped member and the columnar member that stands upright in the center of the disc-shaped member, the columnar member is connected by the tip portion of the injection cylinder. In a state where the space is not pressed, a cavity portion which is a dead space in which the liquid such as the infusion is retained can be eliminated between the connector body and the connection space portion.

When the columnar member is pressed in the direction of the connection space by the tip of the injection barrel, the flexible valve body bends and the boundary between the discoid member and the columnar member is the conical shape. The dead space can be eliminated by closely contacting the outer peripheral surface of the projection member. On the other hand, if the boundary between the disk-shaped member and the column-shaped member is in close contact with the outer peripheral surface of the conical projection member, liquid such as chemical liquid supplied from the mixed injection port may not flow into the connection space. I'm worried.

However, in the connector of the present invention, the conical protrusion member to be inserted into the mixed injection port has a plurality of groove portions along the outer peripheral surface in the axial direction, and the boundary portion between the disc-shaped member and the columnar member is formed by the groove portions. To form a gap. Therefore, a liquid such as a chemical liquid supplied from the mixed injection port can flow into the connection space portion via the groove portion of the conical protrusion member.

Further, in the connector of the present invention, as described above, when the columnar member is pressed toward the connection space portion by the distal end portion of the injection cylinder and the flexible valve body bends, The part may contact the bottom surface of the connection space part. When a part of the disk-shaped member comes into contact with the bottom surface of the connection space, the outlet of the groove of the conical protrusion member is closed by the disk-shaped member, and a liquid such as a chemical solution supplied from the mixed injection port is connected to the connection space. There is concern that it will not be possible to enter the department.

Therefore, in the connector of the present invention, the flexible valve body bends when the columnar member is pressed in the direction of the connection space by the tip portion of the injection barrel, and the flexible valve body is connected by a part of the disc-shaped member. The bottom surface of the connection space portion may have a plurality of recesses that are in contact with a part of the bottom surface of the space portion and that connect the non-contact portion of the disc-shaped member and the groove portion of the outer peripheral surface of the conical protrusion member. preferable.

In the connector of the present invention, since the connection space portion is provided with the plurality of recesses on the bottom surface, the flexible valve body bends so that a part of the disc-shaped member forms a part of the bottom surface of the connection space portion. When it comes into contact with the portion, the liquid such as the chemical liquid supplied from the mixed injection port can flow into the connection space portion from the groove portion of the conical protrusion member via the concave portion of the bottom surface of the connection space portion.

The perspective view which shows one structural example of the connector of this invention. II-II sectional view taken on the line of FIG. III-III sectional view taken on the line of FIG. Explanatory sectional view showing a state where the cylindrical member is pressed in the direction of the connection space by the tip of the injection cylinder. 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 FIGS. 1 and 2, 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. 2, a flexible valve body 3, and a cover member 4 which covers the flexible valve body 3 and is fixed to the connector body 2.

The connector body 2 has an inflow port 21 through which a liquid flows in from an infusion line (not shown), an outflow port 22 through 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. I have it. The inflow port 21 is formed in the disk normal direction from the side surface of the connector body 2, and the outflow port 22 is formed in the disk normal direction from the side surface of the connector body 2 which is symmetrical with respect to the inflow port 21. There is. Further, the connection space portion 23 is formed as a cylindrical space substantially in the center of the connector main body 2, and has a conical projection member 24 standing upright in the direction of the flexible valve body 3 at the center portion of the bottom surface. The conical projection member 24 is provided with a plurality of groove portions 25 on its side surface along the axial direction, and the groove portions 25 communicate with the recesses 26 formed in the bottom surface of the connection space portion 23.

The flexible valve body 3 includes a disk-shaped member 31 that closes the upper portion of the connection space 23, and a cylindrical member 32 that stands upright in the center of the disk-shaped member 31. The disk-shaped member 31 is fitted inside the annular wall portion 27 formed along the outer peripheral edge of the connector body 2, while being formed on the bottom surface of the disk-shaped member 31 along the outer peripheral edge of the connection space portion 23. The annular protrusion 28 is press-fitted. As a result, the disc-shaped member 31 is reliably sandwiched between the cover member 4 (disc-shaped cover portion 41) and the annular protrusion 28.

Further, the columnar member 32 has a mixed injection port 33 along its axial direction. The conical projection member 24 is inserted into the mixed injection port 33 when the distal end portion 5 (see FIG. 4) of the injection cylinder used for mixed injection is pressed toward the connection space portion 23. Therefore, the disk-shaped member 31 is provided with a guide recess 34 that guides the conical projection member 24 immediately below the mixed injection port 33. The mixed injection port 33 is normally closed and communicates with the connection space portion 23 to form a mixed injection passage when the conical projection member 24 guided by the guide recess 34 is inserted.

The cover member 4 covers the flexible valve body 3 except for the bottom surface, and includes a disc-shaped cover portion 41 corresponding to the disc-shaped member 31 and a columnar cover portion 42 corresponding to the columnar member 32. There is. Further, a male screw portion 43 into which a lock cylinder (not shown) of the injection cylinder 5 is screwed is provided on the outer peripheral surface of the cylindrical cover portion 42.

Further, the disc-shaped cover portion 41 is provided with a skirt portion 44 that hangs down from the outer peripheral edge, and the engagement protrusion 45 provided on the bottom surface of the disc-shaped cover portion 41 engages with the engagement concave portion provided on the upper surface of the columnar member 32. Meanwhile, the annular projection 46 formed on the inner peripheral surface of the skirt portion 44 is engaged with the annular concave portion provided on the outer peripheral surface of the annular wall portion 27 while being assembled. As a result, the flexible valve body 3 is fixed by the cover member 4 in a state where the connection space portion 23 of the connector body 2 is closed, while the cover member 4 itself is also fixed to the connector body 2.

In the connector 1 of the present embodiment, the columnar member 32 of the flexible valve body 3 is not pressed by the distal end portion 5 of the injection cylinder toward the connection space portion 23 when connected in the middle of an infusion line (not shown). In the state, the liquid such as the infusion solution, which has flowed in from the infusion line through the inflow port 21, passes through both sides of the conical projection member 24 in the connection space portion 23 and exits from the outflow port 22 as shown by the arrow in FIG. Outflow into the infusion line. At this time, the connection space portion 23 is closed by the disc-shaped member 31 of the flexible valve body 3 as shown in FIG. 2, and the infusion solution is provided between the disc-shaped member 31 and the connection space portion 23. Since there is no hollow portion that becomes a dead space where the liquid such as the liquid stays, the liquid such as the liquid transfusing can flow out to the liquid transfusing line without being retained.

When performing the mixed injection using the connector 1 connected to the infusion line, as shown in FIG. 4, the tip portion 5 of the injection cylinder containing the drug solution to be mixed injected is contacted with the cylindrical member 32 of the flexible valve body 3. In contact with each other, the columnar member 32 is pressed toward the connection space portion 23. By doing so, the flexible valve body 3 bends in a W shape, while the conical projection member 24 is inserted into the mixed injection port 33, so that the mixed injection port 33 communicates with the connection space portion 23 to form the mixed injection path. Form.

At this time, the distal end portion 5 of the injection cylinder is supported by the cylindrical cover portion 42 by the inner peripheral surface of the cylindrical cover portion 42 being in close contact with the outer peripheral surface. Further, when the injection cylinder is an outer cylinder provided on the outer peripheral side of the distal end portion 5 and includes a lock cylinder (not shown) having an internal thread part formed on the inner peripheral surface, the female thread part of the lock cylinder is provided. Can be screwed into the male screw portion 43 formed on the outer peripheral surface of the cylindrical cover portion 42. By screwing the female threaded portion of the lock barrel into the male threaded portion 43, the operation of pressing the columnar member 31 toward the connection space portion 23 by the tip portion 5 of the injection barrel can be performed easily and reliably.

Then, by pushing the plunger of the injection cylinder into the cylinder, the drug solution or the like contained in the injection cylinder is injected from the tip portion 5 of the injection cylinder into the mixed injection port 33 as shown by the arrow.

In addition, as a result of the flexible valve body 3 being bent in the W shape in cross section as described above, the boundary portion between the disk-shaped member 31 and the columnar member 32 comes into close contact with the outer peripheral surface of the conical projection member 24. ing. At this time, since the conical projection member 24 is provided with a plurality of groove portions 25 along the outer peripheral surface along the axial direction, the groove portions 25 should form a gap with respect to the boundary portion between the disk-shaped member 31 and the columnar member 32. You can Therefore, the liquid such as the chemical liquid injected into the mixed injection port 33 can flow into the connection space portion 23 via the groove portion 25 of the conical projection member 24.

When the flexible valve body 3 is bent and the boundary portion between the disk-shaped member 31 and the columnar member 32 comes into close contact with the outer peripheral surface of the conical projection member 24, as shown in FIG. A part of the member 31 may come into contact with the bottom surface of the connection space portion 23. When a part of the disk-shaped member 31 comes into contact with the bottom surface of the connection space 23, the outlet of the groove 25 of the conical projection member 24 is closed by the disk-shaped member 31, and a liquid such as a chemical solution supplied from the mixed injection port 33 is connected. There is concern that it will not be possible to flow into the space 23.

However, in the connector 1 of the present embodiment, the concave portion 26 formed in the bottom surface of the connection space portion 23 has a portion where the disc-shaped member 31 is not in contact (a non-contact portion of the disc-shaped member 31) and a conical projection member. Since the fluid such as the chemical liquid supplied from the mixed injection port 33 is communicated with the groove portion 25 of the connecting hole portion 24 of the conical projection member 24, the liquid is supplied from the groove portion 25 of the conical projection member 24 via the recess portion 26 of the connecting space portion 23. 23.

On the other hand, a liquid such as an infusion solution that has flowed into the connection space portion 23 from the infusion line through the inflow port 21 has a disc-shaped gap 29 formed between the outer peripheral surface of the bent disc-shaped member 31 and the connection space portion 23. It can flow along the outer peripheral surface of the member 31, and at this time, it is mixed with a liquid such as a chemical liquid flowing into the connection space portion 23 via the groove portion 25 or from the groove portion 25 via the recess portion 26, and then flows out from the outlet port 22. Spill into the infusion line.

Therefore, in the connector 1 of the present embodiment, since there is no hollow portion between the disc-shaped member 31 and the connection space portion 23 which is a dead space in which the liquid such as the infusion is retained, the liquid such as the infusion and the mixed injection port. A liquid such as a drug solution supplied from 33 can be allowed to flow out to the infusion line without being retained.

In the connector 1 of the present embodiment, the cover member 4 has the connector body 2 in which the annular projection 46 formed on the inner peripheral surface of the skirt portion 44 is engaged with the annular recess provided on the outer peripheral surface of the annular wall portion 27. It is fixed to. However, as shown in FIG. 5, the cover member 4 is provided with a plurality of claw members 47 extending further downward from the lower end edge of the skirt portion 44, and the claw members 47 are formed on the side surface and the bottom surface of the connector body 2. It may be fixed to the connector body 2 by engaging with the groove portion 20.

Further, in the connector 1 of the present embodiment, the conical protrusion member 24 is provided in the central portion of the bottom surface of the connection space portion 23, but instead of the conical protrusion member 24, a triangular pyramid shape, a quadrangular pyramid shape, or the like is used. A pyramidal projection member may be provided.

DESCRIPTION OF SYMBOLS 1... Connector, 2... Connector main body, 3... Flexible valve body, 4... Cover member, 5... Syringe tip part, 21... Inflow port, 22... Outflow port, 23... Connection space part, 24... Conical shape Protrusion member, 25... Groove portion, 26... Recessed portion, 31... Disc-shaped member, 32... Cylindrical member, 33... Mixed injection port.

Claims (2)

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 an upright position at the center of the bottom surface of the connection space portion. A connector body including a conical protrusion member to
A disc-shaped member, a column-shaped member that stands upright in the center of the disc-shaped member, and the column-shaped member that is formed along the axial direction of the column-shaped member and is pressed in the direction of the connection space by the tip of the injection barrel. A flexible valve body including a mixed injection port communicating with the connection space by inserting the conical protrusion member when
A cover member that covers the flexible valve body and is fixed to the connector body,
The flexible valve body bends when the cylindrical member is pressed in the direction of the connection space by the tip of the injection cylinder, and the conical protrusion is formed at the boundary between the disc-shaped member and the cylindrical member. It adheres to the outer peripheral surface of the member,
The connector, wherein the conical protrusion member has a plurality of groove portions along the outer peripheral surface along the axial direction, and the groove portions form a gap with respect to a boundary portion between the disk-shaped member and the columnar member. The connector according to claim 1, wherein the flexible valve body bends when the columnar member is pressed in the direction of the connection space by the tip of the injection cylinder, and the flexible valve body is connected by a part of the disk-shaped member. Touch a part of the bottom of the space,
A bottom surface of the connection space portion is provided with a plurality of recesses that connect a non-contact portion of the disc-shaped member and a groove portion of an outer peripheral surface of the conical protrusion member.

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