WO2020158580A1

WO2020158580A1 - Connector

Info

Publication number: WO2020158580A1
Application number: PCT/JP2020/002399
Authority: WO
Inventors: 勇輝間中; 大輔中川; 拓弥八島
Original assignee: 株式会社トップ
Priority date: 2019-01-28
Filing date: 2020-01-23
Publication date: 2020-08-06
Also published as: JPWO2020158580A1; TW202045214A; JP7437602B2

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 connector body 2 provided with an inlet port 21, an outlet port 22, and a connection space part 23 which connects the inlet port 21 and the outlet port 22; an inverted flexible bottomed tubular member 3 provided with a hollow part 31 and a coinfusion port 36; a cover member 4 for fixing the bottomed tubular member 3 to the connector body 2; and a partition member 25 which is provided upright on the upstream side of the center of the connection space part 23 and divides the connection space part 23 into the upstream side and the downstream side. An upper part of the partition member 25 is positioned inside the hollow part 31, and when the flexible bottomed tubular member 3 is pressed towards the connection space part 23, a space 28 is formed with the inner wall and the bottom surface of the flexible bottomed tubular member 23.

Description

connector

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

Conventionally, there is known a connector 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 (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 is internally connected to the connector body in an inverted state so that a hollow portion communicating with the connection space portion is provided inside and 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 communicates with the hollow portion when pressed in the direction of the connection space by the tip of the injection cylinder used for mixed injection.

JP 2004-209278A

With the connector described in Patent Document 1, liquid such as infusion solution that has flowed in from the infusion line via the inflow port flows out from the connection space portion to the infusion line via the outflow port as it is, except when performing mixed injection.

However, since the hollow portion becomes a dead space that is not affected by the flow of the liquid from the inlet to the outlet, the liquid such as the infusion will once stay in the hollow portion and stay there. There is inconvenience.

An object of the present invention is to provide a connector that can eliminate such an inconvenience and reduce the amount of liquid such as infusion solution that stays in the cavity.

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 outflow port flowing out to an infusion line, a connection space part to which the inflow port and the outflow port are connected, a cavity part communicating with the connection space part inside, and the cavity on the bottom surface. An inverted flexible bottomed cylindrical member having a mixed injection port communicating with the portion, and a cover member that exposes the bottom surface of the flexible bottomed cylindrical member while covering the side surface and fixing to the connector body. A partition member that is erected on the upstream side of the center of the connection space portion so as to be connected to the inner peripheral wall of the connection space portion and divides the connection space portion into an upstream side and a downstream side; The upper portion is located inside the hollow portion, and when the flexible bottomed tubular member is pressed toward the connection space portion, a gap is formed between the inner wall and the bottom surface of the flexible bottomed tubular member. It is characterized by being present.

In the connector of the present invention, the partition member is erected on the upstream side of the center of the connection space portion, and the partition member is connected to the inner peripheral wall of the connection space portion so that the connection space portion is on the upstream side. It is partitioned into the downstream side, and the upper part thereof is located inside the cavity. Therefore, except when the mixed injection is performed, the liquid such as the infusion solution that has flowed into the upstream section of the connection space section from the infusion line via the inflow port is guided to the cavity section along the surface of the partition member. ..

At this time, since the infusion line is connected to the drug solution bottle on the upstream side, the liquid such as the infusion solution is applied with gravity or a pressure given by an infusion pump. Therefore, when the partition member is erected on the upstream side of the center of the connection space portion, the liquid such as the infusion solution is introduced into the cavity along the surface of the partition member. By pressure, it can flow to the upper part of the cavity. Then, the liquid such as the infusion solution is reversed in the hollow portion, and flows out from the compartment 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, it is possible to cause the liquid to flow out to the infusion line without causing the liquid to stay in the hollow portion which has conventionally been a dead space.

On the other hand, when performing mixed injection, the flexible bottomed tubular member is pressed toward the connection space by the tip of the injection cylinder used for mixed injection, but the partition member is pressed against the flexible bottomed member. Since there is a gap between the inner wall and the bottom surface of the tubular member, the liquid such as the infusion solution can flow out from the gap to the downstream side of the partition member.

Since the liquid such as the infusion solution is applied with the pressure, if the liquid can flow into the cavity while maintaining the pressure as much as possible, the liquid can reach the upper portion of the cavity. It is advantageous in that the liquid is allowed to flow out to the infusion line without being retained in the cavity.

Further, in the connector of the present invention, it is preferable that the connection space portion is located closer to the cavity portion than the inflow port or the outflow port. In the connector of the present invention, by arranging the connection space portion in this way, the relative positional relationship between the mixed injection port and the inflow port and the outflow port and the shape of the flexible bottomed tubular member are determined. The volume of the connection space is reduced without changing, the liquid such as the infusion solution is allowed to efficiently flow into the upper part of the cavity, and the liquid is quickly discharged from the outlet without being retained in the connection space. can do.

In the connector of the present invention, the inner bottom wall of the connection space opposite to the cavity is flush with the receiving surface of the connector body with which the opening end of the flexible bottomed tubular member is in contact. It is more preferable that it is located at, or closer to the cavity than the receiving surface. In the connector of the present invention, by arranging the inner bottom wall of the connection space portion in such a manner, the entire connection space portion is overlapped inside the flexible bottomed tubular member, and the connection is performed. Since the volume of the space can be further reduced, the liquid such as the infusion can more efficiently flow into the upper portion of the cavity and can be quickly discharged from the outlet.

Further, in the connector of the present invention, it is preferable that the partition member has a curved surface that bulges upstream. In the connector of the present invention, since the partition member has the curved surface, when a certain distance is provided between the partition member and the inner peripheral wall on the upstream side of the connection space portion, the partition on the upstream side of the connection space portion is formed. It can be narrowed, and the reduction of the pressure applied to the liquid such as the infusion can be further suppressed.

Further, in the connector of the present invention, it is preferable that the partition member includes an extension portion extending to an upstream side at an end portion on a side connected to the inner peripheral wall of the connection space portion. In the connector of the present invention, since the partition member includes the extending portion, the partition of the connection space portion on the upstream side of the partition member can be narrowed in the width direction, and is applied to the liquid such as the infusion solution. It is possible to further suppress the reduction of the applied pressure.

By the way, since the upper portion of the partition member is located inside the hollow portion, when the flexible bottomed tubular member is pressed toward the connection space portion, the flexible bottomed tubular member is pressed. In order to form a gap between the inner wall and the bottom surface of the connection space, it is necessary to provide a certain distance without being too close to the inner peripheral wall on the upstream side of the connection space portion. However, if the distance between the partition member and the inner peripheral wall of the connection space portion is increased, the compartment on the upstream side of the connection space portion becomes relatively wide, and the liquid such as the infusion solution flows into the compartment from the inflow port. At that time, the pressure is reduced, and it may be difficult for the liquid to reach the upper portion of the cavity.

Therefore, in the connector of the present invention, it is preferable that the partition member has a bulge portion that bulges more upstream than the upper portion in the lower portion. In the connector of the present invention, the partition member is provided with the bulging portion in the lower part, so that when the flexible bottomed tubular member is pressed, an inner wall and a bottom surface of the flexible bottomed tubular member are formed. Even if a gap is formed between the two, it is possible to further narrow the partition on the upstream side of the connection space portion, and it is possible to suppress the reduction of the pressure applied to the liquid such as the infusion solution.

Further, in the connector of the present invention, the partition member is a tapered surface that bulges gradually from the upper side to the lower side instead of the bulging portion, or at the bulging portion or at the upper portion of the bulging portion. May be provided. In this case, the same or more effects as in the case where only the bulging portion is provided can be obtained.

Further, in the connector of the present invention, when mixed injection is performed, the flexible bottomed tubular member is pressed in the direction of the connection space by the tip of the injection barrel or the like to cause compression deformation. Therefore, in the connector of the present invention, when the flexible bottomed tubular member is pressed in the connection space portion direction between the cover member and the flexible bottomed tubular member and is compressed and deformed. It is preferable to provide a gap for accommodating the compressed and deformed portion of the flexible bottomed tubular member.

In the connector of the present invention, since the cover member has the gap between the flexible bottomed tubular member and the flexible bottomed tubular member, the flexible bottomed tubular member is pressed toward the connection space portion. It can be done easily.

Further, the connector of the present invention is a connector that is connected in the middle of an infusion line and is used for mixed injection into the infusion line, and the inflow port through which the liquid flows in from the infusion line and the outflow port where the liquid flows out into the infusion line. Inverted flexible bottomed cylindrical shape having a connector main body having an outlet, a hollow portion inside which the inflow port and the outflow port are individually connected, and a bottom surface having a mixed injection port communicating with the hollow portion A member, a cover member that exposes the bottom surface of the flexible bottomed tubular member, and covers side surfaces to fix the connector body to the connector body, and stands upright on the connector body at a position upstream of the center in the hollow portion. The partition member is provided with an inner wall and a bottom surface of the flexible bottomed tubular member when the flexible bottomed tubular member is pressed toward the connector body. It may be characterized by having a gap therebetween.

In the connector of the present invention, even when the connector body does not include the connection space and the inlet and the outlet are individually connected to the cavity, the position in the cavity upstream of the center By providing the partition member in the above, it is possible to achieve the same effect as in the case where the partition member whose upper portion is located in the outer cavity portion is provided in the connection space portion.

Explanatory sectional drawing 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. In the configuration example shown in FIG. 1, an explanatory cross-sectional view showing a state in which the flexible bottomed tubular member is pressed toward the connection space portion by the distal end portion of the injection barrel. Explanatory sectional drawing which shows the other structural example of the connector of this invention. Explanatory sectional drawing which shows the other structural example of the connector of this invention. Explanatory sectional drawing which shows the III-III sectional view taken on the line of FIG. FIG. 6 is a plan view of the connector body in the configuration example of FIG. 5. Explanatory sectional drawing which shows the other structural example of the connector of this invention. Explanatory sectional drawing 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 a cover member 4 which covers the flexible bottomed tubular member 3 and which 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. The inlet 21 and the outlet 22 are linearly arranged.

The flexible bottomed tubular member 3 includes a cavity portion 31 that communicates with the connection space portion 23 inside, and the cavity portion 31 has a large diameter portion 32 that communicates with the connection space portion 23 and a smaller diameter portion 33 that has a smaller diameter. And a taper portion 34 that gradually reduces the diameter from the large diameter portion 32 side toward the small diameter portion 33 and connects the large diameter portion 32 and the small diameter portion 33. Further, the flexible bottomed tubular member 3 is connected to the connector body 2 in an inverted state so that the bottom surface 35 is located in a direction away from the connection space portion 23 (upper side in FIG. 1 ), and the bottom surface 35. Is equipped with a mixed injection port 36. The mixed injection port 36 communicates with the small diameter portion 33 when the flexible bottomed tubular member 3 is pressed toward the connection space 23 by the tip portion 5 (see FIG. 3) of the injection cylinder used for mixed injection.

The cover member 4 exposes the bottom surface 35 of the flexible bottomed tubular member 3, covers the side surface thereof, and corresponds to the hole portion 41 exposing the bottom surface 35, the large diameter portion 32, and the taper portion 34. The large-diameter cover portion 42 and the small-diameter portion 43 corresponding to the small-diameter portion 33 and the mixed injection port 36 are provided, and the bottom surface of the large-diameter cover portion 42 is ultrasonically fused to the annular protrusion 24 formed on the upper surface of the connector body 2. By being attached, the flexible bottomed tubular member 3 is fixed to the connector body 2.

Further, the cover member 4 has a gap 44 between the large-diameter cover portion 42 and the flexible bottomed tubular member 3, and a lock cylinder (not shown) of an injection cylinder is provided on the outer peripheral surface of the small-diameter cover portion 43. The male screw part 45 screwed together is provided. The gap 44 accommodates a compressed and deformed portion that occurs when the flexible bottomed tubular member 3 is pressed in the direction of the connection space 23 by the distal end portion 5 (see FIG. 3) of the injection cylinder.

A partition member 25 is provided upright on the upstream side of the center of the connection space 23 of the connector body 2. The partition member 25 partitions the connection space 23 into an upstream section 23a and a downstream section 23b, and includes a bulging portion 26 that bulges toward the upstream section 23a at the lower portion thereof, and the upper portion thereof is flexible. It is located in the large diameter portion 32 of the flexible bottomed tubular member 3. Further, as shown in FIG. 2, the partition member 25 is provided at its central portion with a curved surface 27 that is connected to the inner peripheral wall of the connection space portion 23 at both ends and bulges in a semicircular shape in plan view toward the upstream partition 23a. ing.

When the connector 1 of the present embodiment is connected in the middle of an infusion line (not shown), a liquid such as an infusion that flows from the infusion line into the upstream section 23a of the connection space 23 through the inflow port 21 As indicated by the arrow 1, the hollow member 31 is guided along the surface of the partition member 25. Here, since the partition member 25 is connected to the inner peripheral wall of the connection space portion 23 at both ends, the entire amount of the liquid such as the infusion liquid that has flowed into the upstream side partition 23a is guided to the hollow portion 31.

Further, since the infusion line is connected to the drug solution bottle on the upstream side, the liquid such as the infusion solution is connected to the pressure of gravity due to the height difference between the drug solution bottle and the connector 1 or the infusion solution connected in the middle of the infusion line. The pressure provided by the pump is being applied. Therefore, the liquid such as the infusion liquid can flow to the upper portion of the cavity 31 by the pressure when being guided to the cavity 31 along the surface of the partition member 25. Then, the liquid such as the infusion solution is reversed at the upper portion of the hollow portion 31 and flows out from the outflow port 22 to the infusion line, whereby the liquid such as the infusion fluid can be prevented from staying in the hollow portion 31.

On the other hand, since the upper portion of the partition member 25 is located inside the large diameter portion 32 of the flexible bottomed tubular member 3, if it is too close to the inner peripheral wall on the upstream side of the connection space portion 23, it will be described later. As described above, when the flexible bottomed tubular member 3 is pressed toward the connection space portion 23, there is a concern that the upper portion contacts the inner wall and the bottom surface of the flexible bottomed tubular member 3. For this reason, the partition member 25 needs to be provided with a predetermined space between the partition member 25 and the inner peripheral wall on the upstream side of the connection space portion 23. However, when this is done, the pressure of the liquid such as the infusion solution that has flowed into the upstream side partition 23a is reduced. It may be reduced and may not be able to flow sufficiently to the upper part of the cavity 31 when being guided to the cavity 31.

Therefore, the partition member 25 includes a bulging portion 26 that bulges toward the upstream side partition 23a side at the lower portion thereof, and the center portion thereof becomes a curved surface 27 that bulges toward the upstream side partitioning 23a side in a semicircular shape in plan view. ing. As a result, the partition member 25 can reduce the volume of the upstream partition 23a while providing a predetermined space between the partition member 25 and the upstream inner peripheral wall of the connection space portion 23, and the infusion solution or the like flowing into the upstream partition 23a can be formed. It is possible to prevent the pressure of the liquid from being reduced.

Next, when performing mixed injection using the connector 1 connected to the infusion line, as shown in FIG. 3, the distal end portion 5 of the injection cylinder containing the drug solution to be mixed injected is inserted into the hole 41 of the cover member 4. The bottom surface 35 of the flexible bottomed tubular member 3 exposed in the hole 41 is pressed toward the connection space 23 of the connector body 2. With this, the mixed injection port 36 communicates with the small diameter portion 33 as described above.

At this time, the distal end portion 5 of the injection cylinder is supported by the hole portion 41 by the inner peripheral surface of the hole portion 41 being in close contact with the outer peripheral surface. Further, when the injection cylinder is provided with a lock cylinder (not shown) which is an outer cylinder provided on the outer peripheral side of the distal end portion 5 and has an inner peripheral surface formed with a female screw portion, the female screw portion of the lock cylinder is provided. Can be screwed into a male screw portion 45 formed on the outer peripheral surface of the small diameter cover portion 43. By screwing the female screw portion of the lock cylinder with the male screw portion 45, the operation of pressing the bottom surface 35 toward the connection space portion 23 of the connector body 2 by the tip portion 5 of the injection cylinder can be performed easily and reliably.

Then, by pushing the plunger of the injection cylinder into the cylinder, the liquid medicine or the like contained in the injection cylinder is injected from the tip portion 5 of the injection cylinder into the small diameter portion 33 as indicated by an arrow, and the liquid for the infusion line is Mixed injection of chemicals is performed.

At the time of the mixed injection, the flexible bottomed tubular member 3 is compressed and deformed by being pressed by the distal end portion 5 of the injection barrel, but the cover member 4 is placed between the flexible bottomed tubular member 3 and the cover member 4. Since the space 44 is provided in the space 44, the compressed and deformed portion can be accommodated in the space 44, and the operation of pressing the flexible bottomed tubular member 3 toward the connection space part 23 can be easily performed.

Further, when the flexible bottomed tubular member 3 is pressed against the distal end portion 5 of the injection cylinder, a narrow gap 28 is provided between the partition member 25 and the inner wall and bottom surface of the flexible bottomed tubular member 3. Therefore, the liquid such as the infusion solution to which the pressure is applied as described above is ejected from the gap 28 into the downstream section 23b. At this time, since the partition member 25 is located on the upstream side with respect to the center in the connection space portion 23, the downstream section 23b is relatively wider than the upstream section 23a, and the infusion solution ejected from the gap 28. After thoroughly mixing the liquid such as the above with the drug solution co-injected from the injection cylinder, the liquid can be allowed to flow out from the outlet 22 to the infusion line.

Next, another configuration example of the connector 1 will be described. In the following description, the same components as those shown in FIG. 1 will be assigned the same reference numerals and detailed explanations thereof will be omitted.

As shown in FIG. 4, the partition member 25 of the connector 1 may be provided with a tapered surface 29 that gradually expands from the upper side to the lower side toward the upstream side. In this case as well, similar to the bulging portion 26, it is possible to reduce the volume of the upstream side section 23a and suppress the reduction of the pressure of the liquid such as the infusion solution that has flowed into the upstream side section 23a.

Although not shown, the partition member 25 including the bulging portion 26 may be provided with the tapered surface 29. In this case, the bulging portion 26 may be provided with the tapered surface 29, the tapered surface 29 may be provided above the bulging portion 26, or both the bulging portion 26 and the upper portion thereof. You may make it provide the taper surface 29.

Further, as shown in FIGS. 5 to 7, the connection space portion 23 of the connector 1 may be arranged offset from the inflow port 21 and the outflow port 22 toward the cavity 31 side. In this example, the space between the inflow port 21 and the outflow port 22 in the connector main body 2 is partially raised to the flexible bottomed tubular member 3 side to form a bottom shape so that the connection space portion 23 is formed. It is arranged closer to the cavity 31 than 22.

More specifically, the connector body 2 includes the receiving surface 20a with which the open end 37 of the flexible bottomed tubular member 3 contacts, and is opposite to the flexible bottomed tubular member 3 in the connection space portion 23. The inner bottom wall 23c on the side is provided so as to be located on the same plane as the receiving surface 20a. That is, the inner bottom wall 23c of the connection space portion 23 is flush with the receiving surface 20a.

On the opening end 37 side (connector body 2 side) of the large-diameter portion 32 of the flexible bottomed tubular member 3, the inner diameter is generally larger than that of the large-diameter portion 32, and the diameter gradually expands toward the opening end 37 side. A diverging portion 38 having a diameter is provided. In addition, the receiving surface 20a of the connector body 2 is provided with a C-shaped projection 20b that is housed in the expanded portion 38 and has a substantially C-shape in plan view. In this example, the inner peripheral surface of the C-shaped projection 20b constitutes the inner peripheral wall 23d of the connection space portion 23, and the entire connection space portion 23 is inside the flexible bottomed tubular member 3. It is arranged to overlap.

By providing the connection space portion 23 in this way, the connection space can be formed without changing the relative positional relationship between the mixed injection port 36 and the inflow port 21 or the outflow port 22 or the shape of the flexible bottomed tubular member 3. The volume of the portion 23 can be reduced. Thereby, the liquid from the inflow port 21 quickly flows into the cavity portion 31 from the upstream section 23a without deteriorating the usability and manufacturing cost of the connector 1, and the upper portion in the cavity portion 31 is apt to accumulate. Can be reached efficiently. Furthermore, the liquid that has flowed into the downstream section 23b from the cavity 31 can be promptly discharged toward the outlet 22 without being retained.

The inflow port 21 and the upstream section 23a of the connection space portion 23 are connected to each other via an inlet side connection passage 21a. The inlet side connection passage 21a is substantially parallel to the upstream orthogonal portion 21a1 formed in a direction substantially orthogonal to the axis C of the inlet 21 and the outlet 22 and the axis C of the inlet 21 and the outlet 22. It is composed of a parallel part 21a2 on the downstream side which is formed in different directions. The cross-sectional shape of the inlet side connection passage 21a is such that the orthogonal portion 21a1 has a substantially hexagonal shape and the parallel portion 21a2 has a substantially rectangular shape.

The upper portions of the orthogonal portion 21a1 and the parallel portion 21a2 are open over the receiving surface 20a and the inner bottom wall 23c of the upstream section 23a, and the C-shaped projection 20b is notched at a position corresponding to this opening. Thus, the plan view is substantially C-shaped. Further, the upper opening of the inlet side connection passage 21a is partially blocked by the opening end 37 of the flexible bottomed tubular member 3, and the liquid from the inflow port 21 is not blocked by the opening in the parallel portion 21a2. It flows into the upstream section 23a through the unoccluded portion.

Further, the inlet side connection passage 21a is formed to have a smaller cross-sectional area than the inlet 21, so that the liquid flows into the upstream compartment 23a of the connection space 23 at a relatively high flow velocity. Particularly, in this example, the cross-sectional area of the parallel portion 21a2 on the downstream side is further smaller than that of the orthogonal portion 21a1 on the upstream side, so that the liquid more vigorously flows into the upstream side section 23a. Further, in this example, the cross-sectional shape of the orthogonal portion 21a1 is configured to have a width that gradually narrows toward the outlet 22 side, so that the liquid can smoothly flow from the orthogonal portion 21a1 to the parallel portion 21a2. We try to prevent stagnation.

The liquid flowing into the upstream compartment 23a of the connection space 23 is guided toward the upper part (bottom surface 35 side) of the cavity 31 by the partition member 25 provided upright on the inner bottom wall 23c. In this example, the partition member 25 is provided with a curved surface 27 that bulges in a semicircular shape in plan view on the upstream side partition 23a side, and both end portions (in the width direction in the width direction) connected to the inner peripheral wall 23d of the connection space portion 23 are provided. By providing the extending portions 25a extending toward the upstream partition 23a at both ends), the volume of the upstream partition 23a is made smaller. Therefore, the liquid in the upstream section 23 a actively flows toward the upper part of the cavity 31.

The inner wall (inner peripheral wall) of the large diameter portion 32 of the hollow portion 31 of the flexible bottomed tubular member 3 is configured to be substantially continuous with the inner peripheral wall 23 d of the connection space portion 23, and the partition member 25. On both side ends, the portions located in the upper large diameter portion 32 are in contact with the inner wall of the large diameter portion 32. The extending portion 25a is also provided at the portions located inside the large diameter portion 32 at both end portions of the partition member 25.

Therefore, the partition on the lower side of the cavity 31 (on the connector body 2 side) on the upstream side of the partition member 25 has the same small volume as the upstream partition 23a of the connection space 23, which also causes the liquid to flow. The positive flow is made toward the upper part of the cavity 31. Further, in this example, the bulging portion 26 having the tapered surface 29 is provided in the lower portion of the partition member 25, and the corner portion at the upper end is not rounded, so that the liquid is more positively directed to the upper portion of the cavity portion 31. I am trying to make it flow.

In this example as well, when the flexible bottomed tubular member 3 is pressed against the distal end portion 5 of the injection barrel, the partition member 25 and the inner wall and bottom surface of the flexible bottomed tubular member 3 are separated. It goes without saying that a gap 28 (see FIG. 3) is formed in which the liquid can flow. Further, as shown in FIG. 7, in this example, by providing appropriate roundness on the upstream side and the downstream side of both ends of the partition member 25 and the portion of the extending portion 25a located inside the cavity portion 31, it is possible to When the flexible bottomed tubular member 3 is deformed, local contact or catching of the partition member 25 is prevented.

The downstream section 23b of the connection space 23 and the outlet 22 are connected via an outlet connection passage 22a. The outlet connection passage 22a is a passage having a substantially rectangular cross section similar to the orthogonal portion 21a1 of the inlet connection passage 21a, and is formed in a direction substantially orthogonal to the axis C of the inlet 21 and the outlet 22. ing. The outlet-side connection passage 22a is formed in the inner bottom wall 23c on the outlet 22 side of the downstream section 23b and has a cross-sectional area smaller than that of the outlet 22. As a result, an appropriate resistance is imparted to the inflow of the liquid from the downstream section 23b into the outlet connection passage 22a, and the liquid flows into the outlet connection passage 22a from the inlet connection passage 21a without passing through the upper portion of the cavity 31. The generation of flow is being further suppressed.

Further, as shown in FIG. 7, in this example, by smoothly connecting the downstream surface of the partition member 25 and the inner peripheral wall 23d of the downstream section 23b, a corner in the downstream section 23b having a relatively large volume is formed. The parts are eliminated to prevent the accumulation at the corners.

In this way, by providing the partition member 25 and locating the connection space portion 23 closer to the cavity portion 31 side than the inflow port 21 and the outflow port 22, the usability of the connector 1 and the manufacturing cost are not deteriorated, and an infusion solution is provided. The liquid can be more effectively prevented from staying in the cavity 31.

Note that the inner bottom wall 23c of the connection space portion 23 may be provided on the cavity portion 31 side with respect to the receiving surface 20a. Depending on the shape of the flexible bottomed tubular member 3, the inner bottom wall 23c may be arranged closer to the cavity 31 than the receiving surface 20a, and the volume of the connection space 23 may be further reduced. In addition, the inner bottom wall 23c is disposed between the receiving surface 20a and the inflow port 21 or the outflow port 22, and the connection space portion 23 is provided with a portion that does not overlap with the inside of the flexible bottomed tubular member 3, thereby forming a cavity. You may make it adjust the flow state in the part 31 and the connection space part 23.

Further, in the example shown in FIGS. 5 to 7, the inner bottom wall 23c of the connection space portion 23 is configured in a plane shape parallel to the axis C of the inflow port 21 and the outflow port 22, but the inner bottom wall 23c is It may be a flat surface inclined with respect to the axis C, or may be composed of an appropriate curved surface or an uneven surface. The flow state in the cavity portion 31 and the connection space portion 23 can also be adjusted by appropriately setting the inclination and shape of the inner bottom wall 23c.

Further, the inlet side connection passage 21a may be provided with only the orthogonal portion 21a1 and open at the inner bottom wall 23c of the upstream side section 23a. Further, the outlet side connection passage 22a may be provided with a portion parallel to the axis C similarly to the inlet side connection passage 21a. Further, the cross-sectional shape of the inlet side connection passage 21a and the outlet side connection passage 22a may be any shape such as a circular shape.

Further, in the example shown in FIGS. 5 to 7, the bulging portion 26 and the tapered surface 29 of the partition member 25 may be omitted, or the curved surface 27 and the extending portion 25a may be omitted. Further, the curved surface 27 may have a shape other than the semicircular shape in plan view and bulge toward the upstream partition 23a. Further, the partition member 25 may be configured in such a shape that the liquid flow has directionality or an appropriate vortex is generated, for example, by providing the extending portion 25a only on one of both ends.

Further, in this example, the height of the bulging portion 26 is set to about half the height of the connecting space portion 23, but even if the bulging portion 26 is configured to have the same height as the connecting space portion 23. Alternatively, the upper portion of the bulging portion 26 may be located inside the hollow portion 31.

Further, as shown in FIGS. 8 and 9, the connector 1 may not include the connection space portion 23. That is, in the connector 1, the inflow port 21 and the outflow port 22 may be connected to the cavity 31 without the connection space 23.

The example shown in FIG. 8 shows a case where the connection space portion 23 is omitted by omitting the C-shaped projection 20b in the examples shown in FIGS. By omitting the C-shaped projection 20b, in this example, the cavity portion 31 is composed of the expanded portion 38, the large diameter portion 32, the tapered portion 34, and the small diameter portion 33. The inner surface of the receiving surface 20a of the connector body 2 serves as a closing surface 20e that closes the opening of the cavity 31.

The inlet side connection passage 21a is open across the receiving surface 20a and the closing surface 20e, and the liquid from the inflow port 21 is not blocked by the opening end 37 of the flexible bottomed tubular member 3. It is designed to flow into the cavity 31 through. Further, the outlet connection passage 22a is open at a position on the outlet 22 side of the closed surface 20e.

The partition member 25 is erected at the same position as the example shown in FIGS. 5 to 7 on the closing surface 20e, and is located upstream of the center (inward connection passage 21a side) in the cavity 31 as well. .. Further, in this example, the entire partition member 25 is located inside the hollow portion 31. The shape of the partition member 25 is not particularly limited, but it is preferable that the partition member 25 has a shape similar to that of the example shown in FIGS. 5 to 7, and both side ends have inner walls (inner peripheral wall) of the large diameter portion 32 and the expanded portion 38. More preferably, it is in contact with Alternatively, the large diameter portion 32 may be extended to the open end 37 without providing the expanding portion 38 in the flexible bottomed tubular member 3.

In the example shown in FIG. 9, a case where the connection space portion 23 is omitted by providing a convex portion 20f having a substantially circular plan view in place of the C-shaped protrusion 20b in the example shown in FIGS. There is. The projection 20f has a shape in which the space surrounded by the C-shaped projection 20b (that is, the connection space 23) is filled in the example shown in FIGS. At the same time, the top surface serves as a closing surface 20e that closes the opening of the cavity 31.

The inlet side connection passage 21a is open across the receiving surface 20a, the side surface of the convex portion 20f and the closing surface 20e, and the liquid from the inflow port 21 is opened by the opening end 37 of the flexible bottomed tubular member 3. It is designed to flow into the cavity 31 through the unoccluded portion. Further, the outlet connection passage 22a is open at a position on the outlet 22 side of the closed surface 20e.

The partition member 25 is erected at the same position as the example shown in FIGS. 5 to 7 on the closing surface 20e, and is located upstream of the center (inward connection passage 21a side) in the cavity 31 as well. .. Further, the partition member 25 is wholly located in the cavity 31 as in the example shown in FIG. The shape of the partition member 25 is not particularly limited, but the partition member 25 has the same shape as the upper portion of the partition member 25 in the examples shown in FIGS. 5 to 7, and both end portions have an inner wall (inner peripheral wall) of the large diameter portion 32. It is preferable that it is in contact with.

8 and 9, the partition member 25 and the inner wall of the flexible bottomed tubular member 3 when the flexible bottomed tubular member 3 is pressed by the distal end portion 5 of the injection barrel. It goes without saying that a gap 28 (see FIG. 3) through which the liquid can flow is formed between it and the bottom surface.

As described above, the inflow port 21 and the outflow port 22 are individually connected to the cavity 31 via the inlet side connection passage 21a and the outlet side connection passage 22a without providing the connection space portion 23 in the connector body 2. Even in this case, the same effect as the example shown in FIGS. 5 to 7 can be obtained.

Note that, also in the examples shown in FIGS. 8 and 9, the closing surface 20e may be a flat surface inclined with respect to the axis C, or may be composed of an appropriate curved surface or an uneven surface. Further, as the route and the cross-sectional shape of the inlet side connection passage 21a and the outlet-side connection passage 22a, an appropriate route and cross-sectional shape can be adopted.

Although the embodiments of the present invention have been described above, the connector of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Is. For example, the shape and arrangement of each part of the connector 1 are not limited to the shape and arrangement shown in the above embodiment, and various known shapes and arrangements can be adopted.

Further, the inflow port 21 and the outflow port 22 are not limited to being linearly arranged, and may be arranged so that their respective axis centers intersect with each other. The flexible bottomed tubular member 3 is not limited to one in which its own axis is orthogonal to the axis of the inflow port 21 or the outflow port 22, and its own axis is the inflow port 21. Alternatively, it may be arranged so as to be inclined with respect to the axis of the outflow port 22.

Further, in the above embodiment, an example in which a female connector having a female luer taper and a male screw is provided on the inflow port 21 side and a male connector having only a male luer taper is provided on the outflow port 22 side is shown. A male connector having a male luer taper and a female screw may be provided on the side. Further, the male connector in this case may be provided with a separate member for locking which is provided with a female screw and is loosely fitted in the connector body 2, or the entire male connector provided with a male luer taper and a female screw is different. It may be composed of a member, fitted to the outlet 22 side of the connector body 2, and arranged so as to be rotatable relative to the connector body 2 around the axis C. Needless to say, a male connector may be provided on the inflow port 21 side and a female connector may be provided on the outflow port 22 side.

Further, the actions and effects shown in the above embodiment are merely enumeration of the most suitable actions and effects resulting from the present invention, and the actions and effects according to the present invention are not limited to these.

DESCRIPTION OF SYMBOLS 1... Connector, 2... Connector main body, 3... Flexible bottomed cylindrical member, 4... Cover member, 5... Injection barrel tip, 20a... Receiving surface, 21... Inlet, 22... Outlet, 23... Connection space part, 23c...inner bottom wall, 23d...inner peripheral wall, 25...partitioning member, 25a...extension part, 26...bulging part, 27...curved surface, 28...gap, 29...tapered surface, 31...cavity part, 36... Mixed injection port, 37... Open end.

Claims

A connector which is connected in the middle of an infusion line and is used for mixed injection into the infusion line,
A connector main body having 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, and a connection space portion to which the inflow port and the outflow port are connected,
An inverted flexible bottomed tubular member having a hollow portion inside which communicates with the connection space portion and a bottom surface provided with a mixed injection port communicating with the hollow portion;
A cover member that exposes the bottom surface of the flexible bottomed tubular member while covering the side surface and fixing to the connector body;
A partition member that is erected on the upstream side of the center of the connection space portion so as to be connected to the inner peripheral wall of the connection space portion and divides the connection space portion into an upstream side and a downstream side;
The upper part of the partition member is located inside the cavity, and when the flexible bottomed tubular member is pressed in the direction of the connection space part, the partition wall and the inner wall and bottom surface of the flexible bottomed tubular member are A connector characterized by having a gap therebetween.
The connector according to claim 1,
The connector is characterized in that the connection space is located closer to the cavity than the inlet or the outlet.
The connector according to claim 1 or 2,
The inner bottom wall of the connection space opposite to the cavity is located on the same plane as the receiving surface of the connector body with which the opening end of the flexible bottomed tubular member is in contact, or the receiving surface. A connector which is located closer to the cavity than the cavity.
The connector according to any one of claims 1 to 3,
The said partition member is equipped with the curved surface which bulges on the upstream side, The connector characterized by the above-mentioned.
The connector according to any one of claims 1 to 4,
The said partition member equips the edge part by the side connected to the inner peripheral wall of the said connection space part with the extension part extended to an upstream side, The connector characterized by the above-mentioned.
The connector according to any one of claims 1 to 5,
The said partition member is equipped with the bulge part which bulges to an upstream side rather than an upper part in the lower part.
The connector according to any one of claims 1 to 6,
The said partition member is provided with the taper surface which bulges gradually toward an upstream side from upper direction to the lower direction, The connector characterized by the above-mentioned.
The connector according to any one of claims 1 to 7,
When the flexible bottomed tubular member is pressed in the direction of the connection space and compressed and deformed between the cover member and the flexible bottomed tubular member, the flexible bottomed A connector having a gap for accommodating a compressed and deformed portion of a tubular member.
A connector which is connected in the middle of an infusion line and is used for mixed injection into the infusion line,
A connector body having an inflow port through which liquid flows from the infusion line and an outflow port through which liquid flows out to the infusion line;
An inverted flexible bottomed cylindrical member having a hollow portion inside which the inflow port and the outflow port are individually connected, and having a mixed injection port communicating with the hollow portion on the bottom surface;
A cover member that exposes the bottom surface of the flexible bottomed tubular member while covering the side surface and fixing to the connector body.
A partition member that is erected on the connector main body at a position upstream of the center in the hollow portion,
The partition member has a gap between the inner wall and the bottom surface of the flexible bottomed tubular member when the flexible bottomed tubular member is pressed toward the connector body. Connector to be.