TW202031314A - Connector - Google Patents

Abstract

Provided is a connector capable of reducing any retained liquid, such as an infusion liquid, in a hollow part. The connector 1 is connected in the middle of an infusion line and is used in coinfusion. The connector is provided with: a disc-shaped connector body 2 provided with standing members 21a, 21b having U-shaped grooves 23a, 23b at upper parts thereof and a standing member 22 provided with partition members 24, 25 at an upper part thereof; a flexible tower-like member 31 provided with an inverted U-shaped cut-out portion 31 which forms flow paths 36a, 36b between the inverted U-shaped cut-out portion and the U-shaped grooves 23a, 23b of the standing members 21a, 21b and forms a connection space part 37 which connects the flow paths 36a, 36b, an inner wall part 33 which forms a hollow part 32 in which the partition members 24, 25 are placed, and a coinfusion port 35; and a cover member 4 which fixes the flexible tower-like member 3 to the connector body 2 and is provided with an inlet port 43 which communicates with the flow path 36a and an outlet port 44 which communicates with the flow path 36b.

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 a liquid medicine or 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 connected to the cavity when the bottomed cylindrical member is pressed in the direction of the connection space by the tip of the syringe barrel for mixing. [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 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 reduce liquids such as transfusions staying in the cavity. [Technical means to solve the problem]

In order to achieve this objective, the connector of the present invention is: a connector that is connected in the middle of an infusion line and used for mixing the infusion line; it is characterized by: a disc-shaped connector body is provided : The first and second upright members erected from the bottom and equipped with a U-shaped groove on the upper part, and the third upright member interposed between the first and second upright members and erected from the bottom and equipped with a partition member on the upper part; flexible The characteristic tower-shaped member is provided with: an inverted U-shaped notch, which straddles the first to third upright members and is in close contact with the side surface, and forms the first to the U-shaped groove of the first and second upright members. And the second flow path, and the partition member is accommodated between the third upright member and the connecting space portion connecting the first and second flow paths is formed; the inner wall portion is connected to the upper part of the connecting space portion And form a cavity for accommodating the partition member; a mixing port connected to the cavity; and a cover member, which exposes the top surface of the flexible tower-shaped member and covers its side surface to be fixed to the connector body, and It is provided with an inflow port which is connected to the first flow path and allows liquid to flow in from the infusion line; and an outflow port which is connected to the second flow path and allows liquid to flow out of the infusion line.

According to the connector of the present invention, the flexible tower-shaped member straddles the first to third upright members of the connector body by an inverted U-shaped notch and is closely attached to the side surface thereof, thereby forming the first and second 2 flow paths and connection spaces connecting the first and second flow paths. The flexible tower member is fixed to the connector body by the cover member, the first flow path is connected to the inlet of the cover member, and the second flow path is connected to the outlet of the cover member And, the partition member is housed in the cavity connected to the connection space and the connection space.

Here, when the connector of the present invention is connected to the infusion line halfway, the liquid supplied from the infusion line flows from the inflow port to the connection space via the first flow path, and then passes through the second flow The path flows out from the aforementioned outflow port to the infusion pipeline. At this time, the cavity portion communicates with the upper portion of the connection space portion, and the liquid flows into the cavity portion and continues to stay in the cavity portion, making the cavity portion a dead space.

However, the connector of the present invention is provided with the partition member on the upper part of the third vertical member, and the partition member is accommodated in the connection space portion and the cavity portion. Therefore, the internal volume of the connection space portion and the cavity portion is restricted by the partition member, and the dead space in which the liquid stays can be reduced.

In addition, in the connector of the present invention, the flexible tower-shaped member is pressed toward the connection space by the tip of the injection cylinder during mixing. In this way, the bottom of the mixing port is connected to the cavity, and the infusion line can be mixed with the injection barrel. On the other hand, when the flexible tower-shaped member is pressed by the front end of the injection cylinder toward the connection space, the flexible tower-shaped member will bend and bulge toward the cover member. If the cover member is controlled, it is difficult to press the flexible tower member by the front end of the syringe.

Therefore, in the connector of the present invention, it is preferable that the first and second flow paths are arranged in a straight line, and the cover member is on both sides of the straight line, and there is a gap between the flexible tower member and the cover member. . Since the cover member is located on both sides of the straight line, there is a gap between the flexible tower-shaped member and the flexible tower-shaped member. Therefore, when the flexible tower-shaped member is pressed in the direction of the connecting space, the cover can be moved toward the The bulging part on the member side is accommodated in the gap, so the flexible tower-shaped member can be easily pressed by the tip of the syringe barrel.

Furthermore, in the connector of the present invention, it is preferable that the first and second flow paths are arranged in a straight line, and the partition member is a trapezoid of an elliptical cone whose major axis is perpendicular to the straight line. The partition member is an elliptical cone trapezoid, and the long axis of the elliptical cone trapezoid is orthogonal to the straight line, whereby the liquid flowing from the first flow path to the connecting space is guided to the aforementioned elliptical cone trapezoid along the side surface of the elliptical cone trapezoid In the cavity, the liquid that is turned back at the upper end of the cavity can be guided to the second flow path, and the liquid retained in the cavity can be further reduced.

In addition, the connector of the present invention is more preferably: the partition member, instead of the elliptical cone trapezoid, is chamfered cylindrically, and the inclined surface of the chamfered cylindrical shape gradually increases from the first flow path side to the second flow path side . When the partition member is in the shape of the beveled column, the liquid flowing into the connecting space from the first flow path can flow along the inclined surface of the beveled column, thereby being able to easily guide the inside of the cavity , And can further reduce the liquid staying in the cavity.

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 tower-shaped member 3, and the cover member 4 that covers and fixes the flexible tower-shaped member 3 to the connector body 2.

The connector body 2 includes first and second erecting members 21a, 21b erected from the bottom, and a third erecting member 22 erected from the bottom. The first and second upright members 21a and 21b are plate-shaped, are formed linearly at the bottom of the connector body 2, and each have U-shaped grooves 23a and 23b on the upper part. In addition, the third upright member 22 has a cylindrical shape, is interposed between the first and second plate-shaped upright members 21a, 21b, and is provided with an elliptic cone trapezoidal partition member 24 on the upper part.

The flexible tower-shaped member 3 is substantially cylindrical, and includes: an inverted U-shaped notch 31, an inner wall 33 (see FIG. 3) that forms a cavity 32 connected to the inverted U-shaped notch 31, and A mixed injection port 35 with an opening on the top surface 34.

The cover member 4 is provided with a large-diameter cover portion 41 that accommodates the lower hollow of the flexible tower-shaped member 3, and a small-diameter cover portion 42 that accommodates the upper hollow of the flexible tower-shaped member 3. The large-diameter cover portion 41 includes The inflow port 43 through which the liquid flows in from the liquid infusion line, and the liquid outflow to the outflow port 44 of the liquid infusion line. The inflow port 43 is formed from the side surface of the large-diameter cover portion 41 toward the normal direction, and the outflow port 44 is formed from the side surface of the large-diameter cover portion 41 symmetrical to the inflow port 43 toward the normal direction. The inflow port 43 and the outflow port 44 are formed in the normal direction. It is arranged in a straight line. In addition, the small-diameter cover portion 42 is provided with a male thread portion 45 on the outer peripheral surface of a lock cylinder (not shown) to which a syringe barrel is screwed, and a hole portion for exposing the top surface 34 of the flexible tower member 3 46.

As shown in FIGS. 3A and 3B, in the connector 1 of this embodiment, the flexible tower-shaped member 3 is closely connected with the inverted U-shaped notch 31 across the first to third upright members 21a, 21b, 22 On its side surface, the first and second flow paths 36a, 36b are linearly formed between the U-shaped groove portions 23a, 23b of the first and second standing members 21a, 21b. In addition, the flexible tower member 3 is connected between the first and second flow paths 36a and 36b to form a connection space 37 that houses the partition member 24 and connects the first and second flow paths 36a and 36b. There is a gap between the connecting space portion 37 and the partition member 24. The partition member 24 is located in the connecting space portion 37 so as to be orthogonal to the first and second flow paths 36a, 36b that are formed linearly with the long axis of the elliptical cone trapezoid. Way to configure.

At this time, the cavity portion 32 is connected to the upper portion of the connecting space portion 37 and has a gap with the partition member 24 to accommodate the partition member 24. In addition, the mixing port 35 is a rhombus in plan view and opens on the top surface 34 of the flexible tower member 3. The mixing injection port 35 is generally closed, and communicates with the cavity 32 when the flexible tower member 3 is pressed toward the connection space 37 by the tip 5 (see FIG. 4) of the syringe barrel for mixing.

And, as shown in FIGS. 3A and 3C, when the cover member 4 exposes the top surface 34 of the flexible tower member 3 and covers the side surface and fixes it to the connector body 2, the inflow port 43 is connected to the first One flow path 36a, and the outflow port 44 communicates with the second flow path 36b.

When the connector 1 with the cross-sectional shape shown in FIGS. 3A to 3C is connected to an infusion line (not shown) in the middle, the liquid such as infusion from the infusion line through the inflow port 43 is indicated by the arrow in FIG. 3A. It is guided to the connection space portion 37 by the first flow path 36 a, and is introduced into the cavity portion 32 along the side surface of the partition member 24 on the first flow path 36 a side in the connection space portion 37. The liquid introduced into the cavity 32 is folded back at the upper end of the cavity 32, is guided to the second channel 36 b by the side surface of the partition member 24 on the second channel 36 b side, and flows out to the infusion line through the outlet 44. Therefore, the connector 1 prevents the liquid such as the infusion solution from staying in the cavity 32 and flows out into the infusion line.

In addition, a part of the liquid guided to the connection space portion 37 flows into the second flow path 36b around the partition member 24 as indicated by the arrow in FIG. 3C.

When performing mixed injection using the connector 1 connected to the infusion line, as shown in FIG. 4, the tip 5 of the syringe barrel containing the mixed liquid medicine etc. is inserted into the hole 46 of the cover member 4, and there is The top surface 34 of the flexible tower member 3 is pressed in the direction of the connection space 37. In this way, the mixing port 35 is connected to the cavity 32 as described above.

At this time, when the syringe barrel is provided with a lock barrel (not shown) that is an outer sleeve provided on the outer peripheral side of the front end portion 5 and a female screw portion is formed on the inner peripheral surface, the female screw portion of the lock barrel It is screwed to a male screw 45 formed on the outer peripheral surface of the small-diameter cover 42. By screwing the female thread portion of the locking cylinder to the male thread portion 45, it is possible to easily and reliably press the top surface of the flexible tower member 3 toward the connection space portion 37 by the tip portion 5 of the syringe barrel Actions.

In addition, by pushing the plunger of the syringe into the pump, the liquid medicine contained in the syringe is injected from the tip 5 of the syringe to the cavity 32 as indicated by the arrow, and the medicine is applied to the infusion line. Mixed injection of liquid, etc.

During the aforementioned mixed injection, the flexible tower-shaped member 3 is pressed by the tip 5 of the syringe barrel to compress the cavity 32 to reduce its internal volume, and the aforementioned liquid medicine and the like will be deposited in the cavity 32 and the aforementioned infusion liquid. It mixes easily, and can flow out from the 2nd flow path 36b through the outflow port 44 to the infusion line.

Next, other forms of the connector 1 are shown in FIGS. 5A and 5B. In the form shown in Figs. 5A and 5B, in the connector 1, the large-diameter cover portion 41 of the cover member 4 is on both sides of the straight line formed by the first and second flow paths 36a, 36b and is flexible There is a gap 47 between the tower-shaped members 3.

The connector 1 is such that there is a gap 47 between the large-diameter cover portion 41 of the cover member 4 and the flexible tower-shaped member 3, whereby as shown in FIGS. 6A and 6B, the flexible tower-shaped member 3 The bulging part of the flexible tower-shaped member 3 is housed in the space 47 when it is pressed toward the connection space 37 by the front end portion 5 of the syringe barrel. Therefore, the flexible tower-shaped member can be easily made by the front end portion 5 of the syringe barrel. 3's press.

Next, another form of the connector 1 is shown in FIG. 7. In the form shown in FIG. 7, the connector 1 is attached to the upper part of the third upright member 22 of the connector body 2, and has a chamfered cylindrical partition member 25 instead of the elliptical cone trapezoidal partition member 24. The partition member 25 is provided with an inclined surface 26 gradually increasing from the side of the first flow path 36a toward the side of the second flow path 36b.

The connector 1 is equipped with a chamfered cylindrical partition member 25, whereby as indicated by the arrow in FIG. 8, the liquid such as infusion that flows from the infusion line through the inflow port 43 and the first flow path 36a to the connection space 37 follows The inclined surface 26 of the partition member 25 flows so as to be more easily guided to the cavity 32 than the partition member 24 of an elliptical cone trapezoid shape. Therefore, the connector 1 provided with the partition member 25 of a chamfered columnar shape can further reduce the aforementioned liquid remaining in the cavity 32.

1: connector 2: Connector body 3: Flexible tower member 4: cover member 5: The front end of the syringe 21a, 21b, 22: erecting members 23a, 23b: U-shaped groove 24, 25: Partitioning member 31: Inverted U-shaped notch 32: Cavity 33: inner wall surface 34: top surface 35: mixed injection port 36a, 36b: flow path 37: Connection Space Department 41: Large diameter cover 42: Small diameter cover 43: Inlet 44: Outlet 45: Male thread

[Fig. 1] A perspective view showing a configuration example of the connector of the present invention. [Figure 2] Assembly diagram of the connector shown in Figure 1. [Fig. 3A] Fig. 3A is a sectional view taken along the line III-III of Fig. 1. [Fig. 3B] Fig. 3B is a sectional view taken along the line B-B in Fig. 3A. [Fig. 3C] Fig. 3C is a cross-sectional view taken along the line C-C in Fig. 3A. [Fig. 4] An explanatory cross-sectional view showing the configuration example of the cross-section shown in Fig. 3A in which the flexible tower-shaped member is pressed toward the connection space portion by the tip portion of the syringe. [Fig. 5A] Fig. 5A is a plan view showing another configuration example of the connector of the present invention. [Fig. 5B] Fig. 5B is a sectional view taken along the line B-B in Fig. 5A. [Fig. 6A] Fig. 6A shows an explanatory cross-sectional view of the configuration example of the cross-section shown in Fig. 5A in which the flexible tower-shaped member is pressed by the tip of the syringe barrel toward the connection space. [Fig. 6B] Fig. 6B is a sectional view taken along the line B-B in Fig. 6A. Fig. 7 is a perspective view showing the structure of a connector body of another example of the connector of the present invention. [FIG. 8] An explanatory cross-sectional view showing a case where the connector body of FIG. 7 is used in the configuration example of the cross-section shown in FIG. 3A.

1: connector

2: Connector body

3: Flexible tower member

4: cover member

21a, 21b: erecting members

23a, 23b: U-shaped groove

24: Partitioning member

31: Inverted U-shaped notch

32: Cavity

33: inner wall surface

34: top surface

35: mixed injection port

36a, 36b: flow path

37: Connection Space Department

41: Large diameter cover

42: Small diameter cover

43: Inlet

44: Outlet

45: Male thread

Claims (4)

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 disc-shaped connector body is provided with: first and second erecting members erected from the bottom and provided with a U-shaped groove on the upper part, interposed between the first and second erecting members and erected from the bottom and provided on the upper part The third upright member of the partition member; The flexible tower-shaped member is provided with: an inverted U-shaped notch, which straddles the first to third upright members and is closely attached to the side surface, and is formed between the U-shaped grooves of the first and second upright members The first and second flow paths, and the partition member is accommodated between the third upright member to form a connection space portion connecting the first and second flow paths; the inner wall portion is connected to the connection space portion The upper part of the upper part and forms a cavity for accommodating the partition member; the mixing nozzle is connected to the cavity; and The cover member is fixed to the connector body by exposing the top surface of the flexible tower-shaped member and covering the side surface thereof, and is provided with an inflow port which communicates with the first flow path and allows liquid to flow in from the infusion line ; Outlet is connected to the second flow path and allows the liquid to flow out of the infusion pipeline. The connector according to claim 1, wherein the first and second flow paths are arranged in a straight line, and the cover member is arranged on both sides of the straight line, and there is a gap between the flexible tower member and the cover member . The connector according to claim 1, wherein the first and second flow paths are linearly arranged, and the partition member is an elliptical cone trapezoid whose major axis is orthogonal to the straight line. The connector according to claim 1, wherein the first and second flow paths are arranged in a straight line, the partition member is a beveled cylindrical shape, and the inclined surface of the beveled cylinder extends from the first flow path side The second flow path side gradually increases.

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