TW202034981A - Connector - Google Patents

Abstract

Provided is a connector having no dead space in which a liquid such as an infusion liquid is retained. The connector 1 is connected in the middle of an infusion line and is used for coinfusion. The connector is provided with: a connector body 2 provided with an inlet port 21, an outlet port 22, a connection space part 23, and a conical protrusion member 24; a flexible valve body 3 provided with a disc-shaped member 31, a cylindrical member 32, and a coinfusion port 33; and a cover member 4 for securing the flexible valve body 3 to the connector body 2. When the cylindrical member 31 is pressed by a tip part 5 of an injection syringe, the flexible valve body 3 is bent and adhered to the conical protrusion member 24. The conical protrusion member 24 is provided with a groove part 25 which forms a space between the conical protrusion member 24 and the flexible valve body 3.

Description

Connector

The present invention relates to a connector used for co-injection of an infusion pipeline.

Conventionally, there has been known a connector that is connected to the middle of an infusion line and used to mix and inject chemicals and the like into the infusion line (for example, refer to Patent Document 1).

The aforementioned connector is provided with: a connector body, which is provided with an inflow port for letting liquid such as infusion into the infusion line, an outflow port for outflowing the liquid to the infusion line, and a connection space connecting the inflow port and the outflow port A flexible bottomed cylindrical member, which is connected to the connector body, and forms a mixed injection path for the infusion line; and a cover member, which covers the bottomed cylindrical member and is fixed to the connector Ontology.

The bottomed cylindrical member is provided with a hollow portion connected to the connecting space portion inside, and the bottom surface is connected to the connector body in an inverted state in a direction away from the connecting space portion. In addition, the bottomed cylindrical member is provided with a mixing injection port on the bottom surface, and the mixing injection port is opened when the tip portion of the syringe barrel for mixing injection is pressed in the direction of the connection space, and communicates with the cavity. Therefore, the mixed injection port and the cavity form a mixed injection path that guides the liquid medicine or the like mixed from the syringe to the connection space. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2004-209278 A

[The problem to be solved by the invention]

With regard to the connector described in Patent Document 1, other than during co-injection, liquid such as infusion from the infusion line through the inflow port flows directly out of the connection space through the outflow port to the infusion line.

However, the cavity becomes a dead space that is not affected by the flow of the liquid from the inflow port to the outflow port. Therefore, once the liquid such as the infusion fluid flows into the cavity, it will continue to stay in the cavity. The problem.

The purpose of the present invention is to provide a connector which can solve such a problem and can eliminate the dead space where the aforementioned liquids such as infusions stay. [Technical means to solve the problem]

In order to achieve this purpose, the connector of the present invention is: a connector that is connected to the middle of the infusion line and used for mixing the infusion line; it is characterized in that: a connector body is provided to allow liquid to flow from the The inflow port through which the infusion line flows in, the outflow port that causes the liquid to flow out to the infusion line, the connection space connecting the inflow port and the outflow port, and the tapered protrusion member standing at the center of the bottom surface of the connection space; flexibility The valve body is provided with a disc-shaped member, a cylindrical member standing in the center of the disc-shaped member, formed along the axial direction of the cylindrical member, and the cylindrical member is moved to the connecting space by the front end of the injection cylinder When pressed in the direction of the portion, it is inserted into the conical protrusion member to communicate with the mixing port of the connecting space portion; and a cover member that covers the flexible valve body and is fixed to the connector body; the flexible valve body, The cylindrical member buckles when pressed by the front end of the syringe barrel toward the connecting space, and the disc-shaped member and the cylindrical member are in close contact with the outer peripheral surface of the tapered protruding member. The protruding member is provided with a plurality of grooves along the axial direction on the outer peripheral surface, and the grooves form a gap at the boundary between the disc-shaped member and the cylindrical member.

In the connector of the present invention, the flexible valve system includes the disc-shaped member and the cylindrical member standing at the center of the disc-shaped member, so that the cylindrical member is not connected to the front end of the syringe barrel. In a state where the space portion is pressed in the direction, it is possible to eliminate a hollow portion that is a dead space where the liquid such as the infusion fluid stays between the connection space portions of the connector body.

In addition, when the cylindrical member is pressed by the front end of the syringe barrel toward the connecting space, the flexible valve body will buckle and be in close contact with the tapered protrusion at the boundary between the disc-shaped member and the cylindrical member The outer peripheral surface of the member can thereby eliminate dead space. On the other hand, if the boundary portion between the disk-shaped member and the cylindrical member is in close contact with the outer peripheral surface of the tapered protrusion member, the liquid such as the liquid medicine supplied from the mixing port cannot flow into the connecting space. The fear.

However, in the connector of the present invention, the tapered protruding member inserted into the mixing port is provided with a plurality of grooves along the axial direction on the outer peripheral surface, and the grooves are used for the boundary between the disc-shaped member and the cylindrical member. The part forms a gap. Therefore, the liquid such as the medicinal solution supplied from the co-filling port can flow into the connection space via the groove of the tapered protrusion member.

In addition, in the connector of the present invention, when the cylindrical member is pressed by the tip of the syringe barrel toward the connection space and the flexible valve body is bent as described above, a part of the disc-shaped member contacts The bottom surface of the aforementioned connecting space. If a part of the disc-shaped member comes into contact with the bottom surface of the connecting space, the outlet of the groove of the tapered protrusion member will be blocked by the disc-shaped member, and liquids such as medicinal solution supplied from the mixing port cannot It may flow into the connecting space.

Therefore, in the connector of the present invention, it is preferable that the flexible valve body bends when the cylindrical member is pressed toward the connection space by the front end of the syringe barrel and contacts with a part of the disc-shaped member A part of the bottom surface of the connecting space portion is provided with a plurality of recesses that communicate the non-contact portion of the disk-shaped member and the groove portion of the outer peripheral surface of the tapered protrusion member.

In the connector of the present invention, by providing the connecting space portion with the plurality of recesses on the bottom surface, when the flexible valve body flexes and a part of the disk-shaped member contacts a part of the bottom surface of the connecting space portion, The liquid, such as a chemical solution, supplied from the co-filling port can flow into the connection space from the groove of the tapered protrusion member through the recess of the bottom surface of the connection space.

Next, the embodiments of the present invention will be described in further detail while referring to the accompanying drawings.

As shown in Figures 1 and 2, the connector 1 of this embodiment is a medical device that is connected to the middle of an infusion line that is not shown in the figure and is used for mixed injection of medicines and liquids to the infusion line. It includes: a disc shape The connector body 2, the flexible valve body 3, and the cover member 4 that covers and fixes the flexible valve body 3 to the connector body 2.

The connector body 2 is provided with an inflow port 21 into which a liquid from an infusion line not shown in the figure flows, an outflow port 22 through which the liquid flows out into the infusion line, and a connection space 23 connecting the inflow port 21 and the outflow port 22. The inflow port 21 is formed from the side surface of the connector body 2 toward the normal direction of the disk, and the outflow port 22 is formed in a symmetrical manner with respect to the inflow port 21 from the side surface of the connector body 2 toward the normal direction of the disk. In addition, the connection space portion 23 is formed as a cylindrical space at almost the center of the connector main body 2 and includes a conical protrusion member 24 standing in the direction of the flexible valve body 3 in the center portion of the bottom surface. The conical protrusion member 24 is provided with a plurality of grooves 25 along the axial direction on the side surface, and the grooves 25 are connected to the recesses 26 formed on the bottom surface of the connection space 23.

The flexible valve body 3 includes a disk-shaped member 31 that closes the upper portion of the connection space portion 23 and a columnar member 32 that stands at the center of the disk-shaped member 31. The disc-shaped member 31 is embedded in the annular wall 27 formed along the outer peripheral edge of the connector body 2, and the bottom surface of the disc-shaped member 31 is press-fitted along the outer peripheral edge of the connecting space 23 The ring-shaped protrusion 28 formed. Therefore, the disk-shaped member 31 is reliably sandwiched by the cover member 4 (the disk-shaped cover portion 41) and the annular protrusion 28.

In addition, the columnar member 32 includes a mixing port 33 along the axial direction. The mixing injection port 33 is inserted by the conical protrusion member 24 when the tip 5 (see FIG. 4) of the syringe barrel used for mixing is pressed in the direction of the connection space 23. In addition, the disc-shaped member 31 is provided with a guide recess 34 for guiding the conical projection member 24 directly below the mixing port 33. The mixed injection port 33 is normally closed, and when the conical projection member 24 guided by the guide recess 34 is inserted, it communicates with the connection space portion 23 to form a mixed injection path.

The cover member 4 covers the flexible valve body 3 except for the bottom surface, and includes a disk-shaped cover portion 41 corresponding to the disk-shaped member 31 and a cylindrical cover portion 42 corresponding to the cylindrical member 32. In addition, the outer peripheral surface of the cylindrical cover portion 42 is provided with a male screw portion 43 to which a lock cylinder (not shown) of the syringe 5 is screwed.

In addition, the disc-shaped cover portion 41 is provided with a skirt portion 44 hanging down from the outer peripheral edge, and the engaging protrusion 45 provided on the bottom surface of the disc-shaped cover portion 41 is engaged with the engagement provided on the upper surface of the cylindrical member 32 In addition, the annular protrusion 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 27. Therefore, the flexible valve body 3 is fixed by the cover member 4 with the connection space portion 23 of the connector body 2 closed, and the cover member 4 itself is also fixed to the connector body 2.

When the connector 1 of this embodiment is connected to an infusion line (not shown) in the middle, when the cylindrical member 32 of the flexible valve body 3 is not pressed in the direction of the connection space 23 by the tip 5 of the syringe barrel The liquid such as infusion that flows in from the infusion line through the inflow port 21 is indicated by the arrow in FIG. 3 and flows out from the outflow port 22 to the infusion line through both sides of the conical protrusion member 24 in the connecting space portion 23. At this time, the connecting space portion 23, as shown in FIG. 2, is closed by the disc-shaped member 31 of the flexible valve body 3. Therefore, there is no infusion between the disc-shaped member 31 and the connecting space portion 23. In the hollow part of the dead space where the liquid is stagnated, the liquid such as the infusion will not flow out to the infusion line.

When performing mixed injection using the connector 1 connected to the infusion line, as shown in FIG. 4, the tip portion 5 of the syringe barrel containing the liquid medicine for mixed injection is brought into contact with the cylindrical member 32 of the flexible valve body 3. , And press the cylindrical member 32 toward the connection space 23 direction. In this way, the flexible valve body 3 is bent in a W-shape in a cross-sectional view, and the conical protrusion member 24 is inserted into the mixed injection port 33, whereby the mixed injection port 33 communicates with the connecting space portion 23 to form a mixed injection path.

At this time, the front end portion 5 of the syringe barrel is in close contact with the inner peripheral surface of the cylindrical cover 42 on the outer peripheral surface, thereby being supported by the cylindrical cover 42. In addition, when the aforementioned syringe barrel is provided with a lock barrel (not shown) having a female thread portion formed on the inner peripheral surface as an outer sleeve provided on the outer peripheral side of the tip portion 5, the female thread portion of the lock barrel can be screwed. Fits to the male screw portion 43 formed on the outer peripheral surface of the cylindrical cover portion 42. By screwing the female threaded part of the lock cylinder to the male threaded part 43, it is possible to easily and reliably press the cylindrical member 32 in the direction of the connecting space part 23 by the tip part 5 of the syringe barrel.

In addition, by pushing the plunger of the syringe into the pump, the liquid medicine or the like contained in the syringe is injected from the tip 5 of the syringe to the mixing port 33 as indicated by an arrow.

As a result of the flexible valve body 3 buckling in the W-shape in cross-sectional view as described above, the boundary portion between the disc-shaped member 31 and the cylindrical member 32 is in close contact with the outer peripheral surface of the conical projection member 24. At this time, the conical protrusion member 24 is provided with a plurality of grooves 25 along the axial direction on the outer peripheral surface, so that the grooves 25 can form a gap between the disc-shaped member 31 and the columnar member 32. Therefore, the liquid such as the medicinal solution injected into the co-filling port 33 can flow into the connection space portion 23 through the groove portion 25 of the conical protrusion member 24.

When the flexible valve body 3 buckles and the boundary portion between the disc-shaped member 31 and the cylindrical member 32 is in close contact with the outer peripheral surface of the conical protrusion member 24, as shown in FIG. 4, a part of the disc-shaped member 31 is in contact with the connection The bottom surface of the space portion 23. When a part of the disc-shaped member 31 contacts the bottom surface of the connecting space portion 23, the outlet of the groove portion 25 of the conical protrusion member 24 will be blocked by the disc-shaped member 31, and there will be liquid such as chemical solution supplied from the mixing port 33 It may not flow into the connection space 23.

In addition, in the connector 1 of the present embodiment, the recessed portion 26 formed on the bottom surface of the connecting space portion 23 communicates the non-contact portion of the disc-shaped member 31 (non-contact portion of the disc-shaped member 31) with the conical protrusion The groove portion 25 of the member 24 can allow liquid such as a medicinal solution supplied from the co-filling port 33 to flow into the connection space portion 23 from the groove portion 25 of the conical protrusion member 24 via the concave portion 26 of the connection space portion 23.

On the other hand, liquid such as infusion that flows into the connecting space portion 23 from the infusion line via the inflow port 21 can be formed in the gap 29 between the outer peripheral surface of the bent disc-shaped member 31 and the connecting space portion 23 along the circle. The outer peripheral surface of the disk-shaped member 31 flows, and at this time, it mixes with the liquid such as the medicinal solution that flows into the connection space portion 23 via the groove portion 25 or from the groove portion 25 via the recess portion 26, and flows out from the outflow port 22 to the infusion line.

Therefore, in the connector 1 of the present embodiment, there is no cavity between the disc-shaped member 31 and the connecting space portion 23 that becomes a dead space where the liquid of the infusion or the like stays, and the liquid and the connection The liquid such as the liquid medicine supplied from the mixing port 33 is retained and flows out to the aforementioned infusion line.

In the connector 1 of this embodiment, the cover member 4 engages the annular protrusion 46 formed on the inner peripheral surface of the skirt 44 with the annular recess provided on the outer peripheral surface of the annular wall 27, thereby Fixed to the connector body 2. However, the cover member 4 may be provided with a plurality of claw members 47 extending further downward from the lower end edge of the skirt 44 as shown in FIG. 5, and the claw members 47 may be engaged with the connector body 2. The grooves 20 on the side and bottom of the connector are fixed to the connector body 2.

In addition, the connector 1 of the present embodiment includes a conical projection member 24 at the center of the bottom surface of the connection space portion 23, but it may also include a polygonal cone-shaped projection member such as a triangular pyramid and a quadrangular pyramid. The conical protrusion member 24 is replaced.

1: connector 2: Connector body 3: Flexible valve body 4: cover member 5: The front end of the syringe 21: Inlet 22: Outlet 23: Connection Space Department 24: Conical protrusion member 25: Groove 26: recess 27: Ring wall 28: Ring protrusion 31: Disc-shaped member 32: Cylindrical member 33: Mixed injection port 34: Guide recess 41: Disc-shaped cover 42: Cylindrical cover 43: Male thread 44: Skirt 45: snap protrusion 46: Ring protrusion

[Fig. 1] A perspective view showing a configuration example of the connector of the present invention. [Fig. 2] A sectional view taken along the line II-II in Fig. 1. [Fig. 3] A sectional view taken along the line III-III in Fig. 2. [Fig. [Fig. 4] An explanatory cross-sectional view showing a state where the cylindrical member is pressed by the front end of the syringe barrel toward the connection space. [Fig. 5] A perspective view showing another example of the structure of the connector of the present invention.

1: connector

2: Connector body

3: Flexible valve body

4: cover member

21: Inlet

22: Outlet

23: Connection Space Department

24: Conical protrusion member

25: Groove

26: recess

27: Ring wall

28: Ring protrusion

31: Disc-shaped member

32: Cylindrical member

33: Mixed injection port

34: Guide recess

41: Disc-shaped cover

42: Cylindrical cover

43: Male thread

44: Skirt

45: snap protrusion

46: Ring protrusion

Claims (2)

A connector, which is connected in the middle of an infusion pipeline and used for mixed injection to the infusion pipeline; and is characterized by: having: The connector body is provided with an inflow port for letting liquid flow in from the infusion line, an outflow port for letting liquid flow out of the infusion line, a connecting space portion connecting the inflow port and the outflow port, and a bottom surface of the connecting space portion. Conical protrusion in the center; The flexible valve body is provided with a disc-shaped member, a cylindrical member standing in the center of the disc-shaped member, formed along the axial direction of the cylindrical member, and the cylindrical member is moved toward the front end of the syringe barrel. When the connection space portion is pressed in the direction, the tapered protrusion member is inserted to communicate with the mixing injection port of the connection space portion; and The cover member covers the flexible valve body and fixes it to the connector body; In the flexible valve body, the cylindrical member buckles when pressed by the front end of the syringe barrel toward the connecting space, and is in close contact with the tapered protrusion at the boundary between the disc-shaped member and the cylindrical member The outer circumference of the component, The tapered protrusion member is provided with a plurality of grooves along the axial direction on the outer peripheral surface, and the grooves form a gap at the boundary between the disk-shaped member and the cylindrical member. The connector according to claim 1, wherein the flexible valve body flexes when the cylindrical member is pressed toward the connection space by the tip of the syringe, and a part of the disc-shaped member contacts the Part of the bottom surface of the connecting space, The bottom surface of the connecting space portion is provided with a plurality of recesses that communicate the non-contact portion of the disc-shaped member and the groove portion of the outer peripheral surface of the tapered protrusion member.

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