JP6995836B2 - Medical connector - Google Patents

Description

This disclosure relates to medical connectors.

When infusing a patient, it is necessary to form a route (infusion line) for transporting a liquid such as a drug solution. The infusion line is generally formed by connecting an infusion tube, various medical devices, and the like. Further, when injecting a liquid such as a drug solution to be administered to a patient into a drug solution bag, it is necessary to connect the drug solution bag and a syringe or the like. As described above, female connectors and male connectors as medical connectors are used to detachably interconnect different members.

Among the drug solutions, there is a drug solution containing a drug designated as a powerful drug such as an anticancer drug. Medical professionals need to be careful not to allow such dangerous chemicals such as chemicals to adhere to their fingers when attaching or detaching medical connectors.

Patent Document 1 describes a housing that partitions a hollow portion, a first valve body that is movably arranged at the distal end of the hollow portion and closes the housing, a cannula extending in the hollow portion, and a cavity in the hollow portion. Disclosed is a delivery device as a male connector comprising a urging member that urges the first valve body toward the distal end. According to the disclosure of Patent Document 1, when the first valve body is pressed from the distal end side to the proximal end side by the second valve body of the receiver device as a female connector connectable to the delivery device, the first valve body The tip of the cannula penetrates the first valve body and the second valve body while the tip of the cannula is in contact with the second valve body, and the tip of the cannula enters the housing of the receiver device.

U.S. Pat. No. 8,157,784

Patent Document 1 discloses a configuration in which the communication state between the transmission device and the receiver device via a cannula is maintained by a screw connection between the housing of the transmission device and the housing of the receiver device, but the screw connection is loose. If so, the cannula of the sending device may be removed from the housing of the receiving device and the communication state may be released. Therefore, it is desirable that the screw connection between the sending device as a male connector and the receiver device as a female connector is not easily loosened.

A closed male connector (hereinafter referred to as "closed male connector") that closes the flow path so that the liquid does not leak to the outside when the connection with the female connector is disconnected, such as the delivery device described in Patent Document 1, is described. In the case of), it is usually designed so that a stable connection state can be maintained with respect to the dedicated female connector. However, a closed male connector as a medical connector capable of maintaining a stable connection state is desired even for a lock type female connector conforming to ISO80369-7 (2016), which is widely distributed.

Therefore, it is an object of the present disclosure to provide a medical connector having a configuration capable of realizing a screw connection that is hard to loosen even for a lock type female connector conforming to ISO80369-7.

The medical connector as the first aspect of the present invention covers the flow path tube portion that can be inserted into the insertion opening of the lock type female connector conforming to ISO80369-7, and the radial circumference of the flow path tube portion. A connection cylinder portion having a female screw portion that can be screwed into the tip flange of the female connector, and a closed form and the opening that cover the opening on the distal end side of the flow path of the flow path pipe portion in the connection cylinder portion. An elastic valve body whose form can be changed between the open form and the open form is provided, and the female thread portion is screwed with the tip flange, and the elastic valve body is applied to the edge portion of the insertion opening of the female connector. It is provided with a valley portion that sandwiches the tip flange in a contacted state.

As one embodiment of the present invention, the valley portion has a sandwiching portion having a valley diameter smaller than the maximum rotation outer diameter defined by the rotation locus of the tip flange, and a sandwiching portion on the distal end side of the sandwiching portion. A non-pinching portion having a valley diameter equal to or larger than the maximum rotation outer diameter is provided, and the distal end side of the valley portion from the pinching portion is composed of only the non-pinching portion. Has been done.

In one embodiment of the present invention, the valley diameter of the non-pinched portion gradually increases from the proximal end side to the distal end side.

As one embodiment of the present invention, the valley diameter of the sandwiched portion gradually increases from the proximal end side to the distal end side.

As one embodiment of the present invention, the screw height at the position adjacent to the sandwiching portion in the thread portion of the female screw portion is smaller than the protruding length of the tip flange.

As one embodiment of the present invention, a holding cylinder portion located inside the connecting cylinder portion and holding the elastic valve body inside is provided, and the elastic valve body is formed at the distal end of the holding cylinder portion. It comprises a protrusion protruding from the distal opening and having an outer diameter larger than the diameter of the insertion opening of the female connector.

As an embodiment of the present invention, an inner cylinder member including the connection cylinder portion and a housing provided with the flow path pipe portion and holding the inner cylinder member so as to be movable in the axial direction of the inner cylinder member. The elastic valve body is capable of changing its form between the closed form and the open form as the inner cylinder member moves in the axial direction with respect to the housing, and the inner cylinder member is the inner cylinder member. It is provided so as to be projectable from the distal end of the housing, and the projectable length thereof is equal to or greater than the axially movable length of the inner cylinder member with respect to the housing.

As one embodiment of the present invention, the housing is an outer cylinder attached to the holder member in a state of surrounding the holder member including the flow path pipe portion and the radial circumference of the flow path pipe portion. A member, the outer cylinder member includes a locking portion that locks the inner cylinder member at a predetermined position separated from the holder member, and the inner cylinder member is locked to the locking portion. It is movable in the axial direction with respect to the housing from one position to a second position in contact with the holder member.

As one embodiment of the present invention, a groove extending spirally is formed on one of the outer wall of the inner cylinder member and the inner wall of the outer cylinder member, and the outer wall of the inner cylinder member and the outer cylinder member are formed. On the other side of the inner wall of the above, a convex portion that moves in the groove is formed by moving the inner cylinder member relative to the outer cylinder member in the circumferential direction.

According to the present disclosure, it is possible to provide a medical connector having a configuration capable of realizing a screw connection that is hard to loosen even for a lock type female connector conforming to ISO80369-7.

It is a side view which shows the closed male connector as one Embodiment of this invention, and the female connector which can be connected to this closed male connector. It is sectional drawing which follows the I-I line of FIG. It is sectional drawing which follows the II-II line of FIG. It is a figure which shows the state which separated the inner cylinder member from the closed type male connector shown in FIG. It is a figure which looked at the female connector shown in FIG. 1 from the top surface side of a cap. It is sectional drawing which shows the connection middle state of the closed type male connector and female connector shown in FIG. It is sectional drawing which shows the connection completion state of the closed type male connector and female connector shown in FIG. FIG. 2 is an enlarged cross-sectional view of the female threaded portion of the connecting cylinder portion and the male threaded portion of the cap in FIG. 2. FIG. 7 is an enlarged cross-sectional view of the female threaded portion of the connecting cylinder portion and the male threaded portion of the cap in FIG. 7. It is sectional drawing of the modification of the closed type male connector shown in FIG. It is a figure which shows the infusion set which has the closed male connector of FIG. 1 and another infusion set which has the female connector 2 shown in FIG.

Hereinafter, embodiments of the medical connector according to the present invention will be described with reference to FIGS. 1 to 11. The same reference numerals are given to common members / parts in each figure.

FIG. 1 is a side view showing a closed male connector 1 as an embodiment of a medical connector according to the present invention, and a female connector 2 connectable to the closed male connector 1. FIG. 2 is a cross-sectional view taken along the line I-I of FIG. The closed male connector 1 and the female connector 2 shown in FIGS. 1 and 2 show the state of each unit before being connected to each other. Hereinafter, in the closed male connector 1 and the female connector 2, one end side which is the downstream side (upper part of FIG. 1) of the liquid such as a chemical solution in the infusion line is the "distal end" side, and the liquid is in the infusion line. The other end side, which is the upstream side of the flow path (lower side of FIG. 1), is referred to as the "proximal end" side.

As shown in FIGS. 1 and 2, the closed male connector 1 includes a housing 10, an inner cylinder member 20, and an elastic valve body 30.

The housing 10 includes a flow path pipe portion 11. The flow path tube portion 11 can be inserted into the insertion opening 42c of the female connector 2.

The inner cylinder member 20 is movably held with respect to the housing 10 in a direction parallel to the central axis O of the inner cylinder member 20 (hereinafter, simply referred to as “axial direction A”). Further, the inner cylinder member 20 includes a connecting cylinder portion 21. The connection cylinder portion 21 covers the periphery of the flow path pipe portion 11 in the radial direction B, and includes a female screw portion 21a that can be screwed into the tip flange 47 of the female connector 2.

The elastic valve body 30 has a form in the connecting tube portion 21 between a closed form that covers the opening 11a1 on the distal end side of the flow path 11a of the flow path tube portion 11 and an open form that opens the opening 11a1. It can be changed. Specifically, the elastic valve body 30 of the present embodiment is formed with a slit 32a, and the closed form of the present embodiment is a state in which the tip of the flow path tube portion 11 is covered with the elastic valve body 30. .. Further, in the open form of the present embodiment, the tip of the flow path pipe portion 11 penetrates the elastic valve body 30 through the slit 32a.

The female connector 2 is a lock-type female connector conforming to ISO80369-7 of 2016. As shown in FIGS. 1 and 2, the female connector 2 includes a housing 40 and an elastic valve body 50.

Hereinafter, in order to distinguish between the housing 10 of the closed male connector 1 and the housing 40 of the female connector 2, the housing 10 of the closed male connector 1 is referred to as a “first housing 10” for convenience of explanation, and is female. The housing 40 of the connector 2 is referred to as a "second housing 40". Further, in order to distinguish between the elastic valve body 30 of the closed male connector 1 and the elastic valve body 50 of the female connector 2, for convenience of explanation, the elastic valve body 30 of the closed male connector 1 is referred to as a “first elastic valve”. It is described as "body 30", and the elastic valve body 50 of the female connector 2 is described as "second elastic valve body 50".

The second housing 40 partitions the hollow portion 41. One end of the hollow portion 41 is an insertion opening 42c into which the flow path pipe portion 11 of the closed male connector 1 can be inserted. That is, the flow path tube portion 11 of the closed male connector 1 is inserted into the hollow portion 41 through the insertion opening 42c. The hollow portion 41 is composed of a holding space 41a in which the second elastic valve body 50 is held and a flow path 41b communicating with the holding space 41a. Further, the second housing 40 includes a tip flange 47 that can be screwed with the female screw portion 21a of the connection cylinder portion 21 of the closed male connector 1.

Specifically, the second housing 40 includes a cap 42 and a holder 43, and the hollow portion 41 described above includes a holding space 41a defined by the cap 42 and a flow path defined by the cap 42 and the holder 43. It is composed of 41b and.

The above-mentioned tip flange 47 is formed on the outer wall of the cap 42. The tip flange 47 of the present embodiment forms a part of the thread 46a of the male threaded portion 46 formed on the outer wall of the cap 42. Details of the tip flange 47 will be described later (see FIGS. 2, 5, etc.).

The second elastic valve body 50 is located in the hollow portion 41 of the second housing 40 and closes the hollow portion 41. Specifically, as described above, the second elastic valve body 50 is located in the holding space 41a of the hollow portion 41 in which the cap 42 is partitioned, and is sandwiched and compressed by the cap 42 from the top surface 50a and the bottom surface 50b. It is held in the state of being held. The second elastic valve body 50 is formed with a slit 51 through which the flow path pipe portion 11 of the closed male connector 1 can be inserted.

When connecting the closed male connector 1 and the female connector 2 shown in FIGS. 1 and 2, first, the tip of the female connector 2 is connected to the female screw portion 21a of the connection cylinder portion 21 of the closed male connector 1 described above. The male screw portion 46 including the flange 47 is screwed. At this time, the female screw portion 21a and the male screw portion 46 are screwed together until the first elastic valve body 30 of the closed male connector 1 comes into contact with the edge portion 42c1 of the insertion opening 42c of the female connector 2. Hereinafter, the state in which the first elastic valve body 30 of the closed male connector 1 abuts on the edge portion 42c1 of the insertion opening 42c of the female connector 2 is referred to as a “contact state”.

Next, in the abutting state, the inner cylinder member 20 including the connecting cylinder portion 21 of the closed male connector 1 is moved in the axial direction A with respect to the first housing 10 of the closed male connector 1. As a result, the flow path pipe portion 11 of the closed male connector 1 can be relatively moved in the axial direction A with respect to the first elastic valve body 30. Therefore, the tip of the flow path pipe portion 11 can be moved so as to penetrate the first elastic valve body 30. As a result, the flow path tube portion 11 can be inserted into the hollow portion 41 of the female connector 2. The details of this connection operation will be described later (see FIGS. 6 and 7).

The female screw portion 21a includes a valley portion 29a that sandwiches the tip flange 47 in the above-mentioned contact state. Therefore, as compared with the configuration in which the tip flange is not sandwiched in the same contact state, the tip flange 47 is less likely to rotate with respect to the female thread portion 21a due to the increase in frictional force. That is, it is possible to make it difficult to loosen the screw connection between the tip flange 47 and the female thread portion 21a. The details will be described later (see FIGS. 8 and 9).

Hereinafter, details of each of the closed male connector 1 and the female connector 2 will be described.

<Closed male connector 1>
As described above, the closed male connector 1 of the present embodiment includes a first housing 10, an inner cylinder member 20, and a first elastic valve body 30. Hereinafter, details of each member will be described.

[First housing 10]
The first housing 10 includes a holder member 12 and an outer cylinder member 13.

The holder member 12 has a flow path pipe portion 11 described above, a flange portion 14 projecting radially B from the proximal end of the flow path pipe portion 11, and a flange portion 14 projecting from the flange portion 14 toward the proximal end side. A connecting portion 15 that can be connected to a medical device such as a medical tube, and an annular projecting portion that protrudes from the flange portion 14 to the distal end side so as to surround the outside of the flow path tube portion 11 in the radial direction B. 16 and.

As shown in FIG. 2, the flow path pipe portion 11 extends in the outer cylinder member 13 in a direction parallel to the central axis of the outer cylinder member 13. That is, the direction parallel to the central axis of the flow path tube portion 11 is substantially the same as the direction parallel to the central axis of the outer cylinder member 13. Further, as shown in FIG. 2, the direction parallel to the central axis of the flow path tube portion 11 and the direction parallel to the central axis of the outer cylinder member 13 are substantially the same as the axial direction A of the inner cylinder member 20 described later. Is. In other words, as shown in FIG. 2, the central axis of the flow path pipe portion 11 of the present embodiment, the central axis of the outer cylinder member 13, and the central axis O of the inner cylinder member 20 substantially coincide with each other. Therefore, for convenience of explanation below, the direction parallel to the central axis of the flow path tube portion 11, the direction parallel to the central axis of the outer cylinder member 13, and the axial direction A of the inner cylinder member 20 are all "axial direction A". It is described as.

Further, the radial directions of the flow path pipe portion 11, the outer cylinder member 13, and the inner cylinder member 20 are also substantially the same. Furthermore, the circumferential directions of the flow path pipe portion 11, the outer cylinder member 13, and the inner cylinder member 20 are substantially the same. Therefore, hereinafter, for convenience of explanation, the radial directions of the flow path pipe portion 11, the outer cylinder member 13, and the inner cylinder member 20 are all referred to as “diameter direction B”. Further, for convenience of explanation, the circumferential direction of the flow path pipe portion 11, the outer cylinder member 13, and the inner cylinder member 20 are all described as “circumferential direction C”.

As shown in FIG. 2, the flow path pipe portion 11 internally partitions the flow path 11a. The flow path 11a of the flow path tube portion 11 extends in the axial direction A. An opening 11a1 penetrating in the radial direction B is formed at the distal end of the flow path tube portion 11. The distal end of the flow tube portion 11 is closed. Further, the proximal end of the flow path tube portion 11 is not closed but is open, and an opening 11a2 is formed at the proximal end of the flow path tube portion 11. That is, the flow path 11a of the flow path tube portion 11 extends from the opening 11a2 on the proximal end side of the flow path tube portion 11 to the opening 11a1 on the distal end side.

The flow path tube portion 11 is inserted into the insertion opening 42c of the female connector 2 when connected to the female connector 2. The details will be described later (see FIG. 7).

The flange portion 14 supports the proximal end of the first elastic valve body 30, which will be described later, at a position outside the radial direction B of the flow path pipe portion 11. More specifically, the flange portion 14 abuts on the proximal end of the first elastic valve body 30 at a position between the flow path pipe portion 11 and the protruding portion 16 in the radial direction B, whereby the first elastic valve portion 14 comes into contact with the proximal end of the first elastic valve body 30. Supports body 30.

The connecting portion 15 is a tubular portion projecting from the flange portion 14 to the proximal end side, and can be connected to the medical tube by, for example, an inwardly fitted medical tube as a medical device. The tubular connecting portion 15 defines a hollow portion 15a whose distal end communicates with the flow path 11a of the above-mentioned flow path pipe portion 11 and whose proximal end is open to the outside.

The connection portion 15 of the present embodiment shown in FIG. 2 constitutes a female connector portion conforming to ISO80369-7 of 2016. Therefore, not only the connection of the medical tube by the fitting described above, but also the lock type male connector conforming to ISO80369-7 of 2016 can be connected to the connection portion 15 of the present embodiment. Further, the connecting portion 15 of the present embodiment can also be connected to the distal end of the closed connector having the same shape as the closed male connector 1.

The annular protrusion 16 comes into contact with the inner cylinder member 20 and restricts the movement of the inner cylinder member 20 toward the proximal end side in the axial direction A. Specifically, the convex portion 21b formed on the outer wall of the inner cylinder member 20 comes into contact with the distal end which is the tip of the protruding portion 16, so that the inner cylinder member 20 moves toward the proximal end side. Be regulated. The details will be described later (see FIGS. 4, 7, etc.).

The outer cylinder member 13, which will be described later, is supported by the flange portion 14 in a state where the proximal end portion thereof is externally fitted to the annular protruding portion 16. However, the outer cylinder member 13 is fitted to the protrusion 16 so as to be in close contact with the outer surface of the annular protrusion 16, and the outer cylinder member 13 is projected together with the flange portion 14 or in place of the flange portion 14. It may be configured to be supported by the portion 16.

Further, as shown in FIG. 2, the length of the protruding portion 16 in the axial direction A is larger than the length of the axial direction A of the flow path pipe portion 11 and the length of the outer cylinder member 13 in the axial direction A. short. In other words, the flow path tube portion 11 and the outer cylinder member 13 extend to the distal end side of the protruding portion 16. Furthermore, the flow path tube portion 11 extends to the distal end side of the outer cylinder member 13.

Further, although the annular protrusion 16 is used in the present embodiment, if the configuration is such that the inner cylinder member 20 comes into contact with the inner cylinder member 20 and the movement of the inner cylinder member 20 toward the proximal end side in the axial direction A is restricted. Not limited to the configuration. Therefore, the protruding portion may be formed by a plurality of protrusions protruding from the flange portion 14 and arranged along the circumferential direction C. The protrusion in such a case may be a rod-shaped protrusion extending in the axial direction A, or may be a curved plate-shaped protrusion having an arc-shaped cross section orthogonal to the axial direction A.

Examples of the material of the holder member 12 include polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymer; ethylene-vinyl acetate copolymer (EVA); polyvinyl chloride; polyvinylidene chloride; polystyrene; polyamide; polyimide; polyamide. Imid; Polycarbonate; Poly- (4-methylpentene-1); Ionomer; Acrylic resin; Polymethylmethacrylate; Acrylonitrile-butadiene-styrene copolymer (ABS resin); Acrylonitrile-styrene copolymer (AS resin); butadiene- Styrene copolymer; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT); polyether; polyetherketone (PEK); polyetheretherketone (PEEK); polyetherimide; Polyacetal (POM); Polyphenylene oxide; Modified polyphenylene oxide; Polysulfone; Polyethersulfone; Polyphenylene sulfide; Polyallylate; Aromatic polyester (liquid crystal polymer); Polytetrafluoroethylene, Polyfluorinated vinylidene, and other fluororesins; Examples include resin materials. Further, a blend containing one or more of these, a polymer alloy, or the like may be used. In addition, various glass materials, ceramic materials, and metal materials may be used.

The holder member 12 of the present embodiment is integrally formed of a single material, but is provided with at least the above-mentioned flow path pipe portion 11, flange portion 14, connecting portion 15, and protruding portion 16. It may be formed by assembling a plurality of members.

The outer cylinder member 13 is attached to the holder member 12 in a state of surrounding the circumference of the flow path pipe portion 11 in the radial direction B. Specifically, the outer cylinder member 13 has a substantially cylindrical shape, and is concentric with the flow path pipe portion 11 in a cross section orthogonal to the axial direction A on the outside in the radial direction B with respect to the flow path pipe portion 11. It surrounds the perimeter of the flow path tube portion 11 so as to form a shape. Further, the outer cylinder member 13 surrounds the periphery of the protrusion 16 so as to be concentric with the annular protrusion 16 in a cross section orthogonal to the axial direction A outside the radial direction B with respect to the protrusion 16. I'm out. In this state, the proximal end portion of the outer cylinder member 13 is attached to the flange portion 14 by ultrasonic welding, adhesion, or the like.

Further, the inner cylinder member 20 is fitted in the outer cylinder member 13. Specifically, the inner cylinder member 20 is held in the outer cylinder member 13 so as to be movable in the axial direction A with respect to the outer cylinder member 13. A female screw portion 13a is formed on the inner wall of the outer cylinder member 13 of the present embodiment. In other words, a groove 13a1 extending in a spiral shape is formed on the inner wall of the outer cylinder member 13. On the other hand, a convex portion 21b is formed on the outer wall of the inner cylinder member 20 described later (see FIG. 4). The convex portion 21b can move along the above-mentioned groove 13a1. That is, by moving the inner cylinder member 20 relatively in the circumferential direction C with respect to the outer cylinder member 13, the convex portion 21b can be moved in the groove 13a1 along the extending direction of the groove 13a1. .. As a result, the inner cylinder member 20 can be moved in the axial direction A with respect to the outer cylinder member 13. The details will be described later (see FIG. 4).

Here, FIG. 3 is a cross-sectional view of the closed male connector 1 at the position of the line II-II of FIG. As shown in FIGS. 1 and 3, the peripheral wall of the outer cylinder member 13 is provided with a deformable portion 18 that is elastically deformable in the radial direction B and is composed of a portion surrounded by a notch-shaped gap 17. More specifically, in the present embodiment shown in FIG. 3, gaps 17 are formed at each of the four positions at equal intervals in the circumferential direction C, and are surrounded by the gaps 17 of the outer cylinder members 13. The deformed portion 18 is formed by the portion. In other words, in the present embodiment, the deforming portions 18 are arranged at each central angle of about 90 degrees, and a total of four deforming portions 18 are provided.

More specifically, in the deformed portion 18 of the present embodiment, the proximal end side is continuous with the peripheral wall of the outer cylinder member 13, and the distal end side sandwiches the gap 17 and is not continuous with the peripheral wall of the outer cylinder member 13. Further, both sides of the deformed portion 18 in the circumferential direction C also sandwich the gap 17 and are not continuous with the peripheral wall of the outer cylinder member 13. The deformable portion 18 having such a configuration is elastically deformable in the radial direction B on the distal end side with respect to the proximal end side.

A protrusion 18a projecting inward in the radial direction B is provided at the distal end of the deformed portion 18. The protrusion 18a in the deformed portion 18 of the outer cylinder member 13 is a locking portion in which the inner cylinder member 20 can be locked at a predetermined position separated from the holder member 12. As described above, the deformed portion 18 can be elastically deformed in the radial direction B. The position of the protrusion 18a can be changed in the radial direction B by the elastic deformation of the deformed portion 18 in the radial direction B. In this way, by elastically deforming the deformed portion 18 in the radial direction B, between the locking position for locking the inner cylinder member 20 and the locking release position for releasing the locking of the inner cylinder member 20. , The position of the protrusion 18a in the radial direction B is changed. The protrusion 18a as a locking portion shown in FIG. 2 is in a locked position. The details of this operation will be described later (see FIGS. 6 and 7).

As the material of the outer cylinder member 13, for example, the same material as the material that can be used as the holder member 12 described above can be mentioned.

[Inner cylinder member 20]
As shown in FIG. 2, the inner cylinder member 20 has a connection cylinder portion 21 having a female screw portion 21a formed on the inner wall and a position on the inner wall of the connection cylinder portion 21 on the proximal end side of the female screw portion 21a. A first annular flange portion 22 protruding inward in the radial direction B, and a holding cylinder portion 23 located in the connecting cylinder portion 21 and protruding toward the distal end side in the axial direction A from the inner edge portion of the first annular flange portion 22. From the thin cylinder portion 24 having a smaller outer diameter than the connecting cylinder portion 21 and protruding from the inner edge portion of the first annular flange portion 22 toward the proximal end side in the axial direction A, and from the proximal end of the thin cylinder portion 24. It includes a second annular flange portion 25 projecting outward in the radial direction B, and a base end cylinder portion 26 projecting from the outer edge of the second annular flange portion 25 toward the proximal end side in the axial direction A.

FIG. 4 is a diagram showing a state in which the inner cylinder member 20 is separated from the closed male connector 1. Specifically, in FIG. 4, the separated inner cylinder member 20 is shown in a perspective view, and the remaining portion of the closed male connector 1 is shown in a cross-sectional perspective view. As shown in FIG. 4, the connecting cylinder portion 21, the thin cylinder portion 24, and the base end cylinder portion 26 have a substantially cylindrical shape. The outer peripheral surface of the inner cylinder member 20 is confined at the position of the thin cylinder portion 24, and an annular groove 24a extending in the circumferential direction C is formed.

In the state before connection shown in FIG. 2 (hereinafter, referred to as “non-connection state”), the first annular flange portion 22, the thin cylinder portion 24, the second annular flange portion 25, and the base of the inner cylinder member 20. The end cylinder portion 26 is fitted in the outer cylinder member 13. On the other hand, in the non-connected state shown in FIG. 2, the connecting cylinder portion 21 and the holding cylinder portion 23 of the inner cylinder member 20 are distal to the outer cylinder member 13, that is, distal to the first housing 10. It protrudes to the end side.

In the non-connected state shown in FIG. 2, a protrusion 18a as a locking portion of the outer cylinder member 13 is fitted in the annular groove 24a formed on the outer wall of the inner cylinder member 20. That is, the protrusion 18a is in the locking position. Therefore, the inner cylinder member 20 cannot move to the proximal end side in the axial direction A with respect to the outer cylinder member 13 unless the protrusion 18a is moved from the locking position to the unlocking position. Although the details will be described later, the protrusion 18a moves from the locking position to the unlocking position when a force of a predetermined value or more acts on the proximal end side in the axial direction A with respect to the inner cylinder member 20. There is.

Further, as shown in FIG. 4, a convex portion 21b is formed on the outer wall of the inner cylinder member 20. More specifically, the convex portion 21b is formed on the outer wall of the base end tubular portion 26 of the inner tubular member 20. The convex portion 21b can move in the spiral groove 13a1 of the female screw portion 13a formed on the inner wall of the outer cylinder member 13. As a result, the inner cylinder member 20 can move in the axial direction A with respect to the outer cylinder member 13.

In the present embodiment, as shown in FIG. 4, two convex portions 21b are provided at positions facing each other in the radial direction B. Further, two spiral grooves 13a1 of the outer cylinder member 13 are also provided so as to correspond to the two convex portions 21b.

As shown in FIG. 2, the holding cylinder portion 23 and the thin cylinder portion 24 hold the first elastic valve body 30 inside. Specifically, the holding cylinder portion 23 and the thin cylinder portion 24 partition the accommodation space 27 for accommodating the tip portion 32 described later of the first elastic valve body 30. An annular protrusion 28 projecting inward in the radial direction B is formed on the inner wall that divides the storage space 27. The annular protrusion 28 is recessed into the tip portion 32 of the first elastic valve body 30 and prevents the tip portion 32 from falling out of the accommodation space 27. Further, the first elastic valve body 30 protrudes from the distal end opening 23a formed at the distal end of the holding cylinder portion 23.

As the material of the inner cylinder member 20, for example, the same material as the material that can be used as the holder member 12 described above can be mentioned.

[First elastic valve body 30]
The first elastic valve body 30 covers the flow path pipe portion 11. Specifically, the first elastic valve body 30 of the present embodiment closes the bellows tube portion 31 that can be elastically deformed so as to be folded in the axial direction A, and the distal end side of the hollow portion of the bellows tube portion 31. As described above, a columnar tip portion 32 continuous with the bellows tube portion 31 and a flange portion 33 protruding outward in the radial direction B at the position of the distal end portion of the bellows tube portion 31 are provided.

The proximal end of the bellows tube portion 31 is in contact with the flange portion 14 of the holder member 12 of the first housing 10. The tip portion 32 is held in the accommodation space 27 partitioned by the holding cylinder portion 23 and the thin cylinder portion 24 of the inner cylinder member 20.

The flange portion 33 is in contact with the second annular flange portion 25 of the inner cylinder member 20 in a state where the tip portion 32 is accommodated in the accommodation space 27. As a result, the tip portion 32 does not come out from the accommodation space 27 toward the distal end side. As described above, an annular protrusion 28 is formed on the inner wall that divides the accommodation space 27. Therefore, the tip portion 32 does not easily come off even on the proximal end side.

The cylindrical tip portion 32 is formed with a slit 32a penetrating from the proximal end side to the distal end side. Further, the tip portion 32 protrudes from the distal end opening 23a formed at the distal end of the holding cylinder portion 23. In other words, the first elastic valve body 30 includes a protrusion 34 protruding from the distal end opening 23a. The tip surface 34a, which is the end surface on the distal end side of the protrusion 34 of the present embodiment, has a convex curved surface. Since the tip surface 34a has a convex curved surface, it becomes easy to come into close contact with the top surface 50a of the second elastic valve body 50 of the female connector 2, which will be described later.

The protrusion 34 has an outer diameter D5 (see FIG. 8) larger than the diameter D4 (see FIG. 8) of the insertion opening 42c of the female connector 2. With such a configuration, when the female connector 2 is connected, the entire edge portion 42c1 of the insertion opening 42c of the female connector 2 can be easily covered by the protruding portion 34. Details will be described later (see FIGS. 8 and 9).

The tip surface 34a of the protrusion 34 of the present embodiment is composed of one curved surface having an arc shape in the cross-sectional view of FIG. 2, but only the periphery of the slit 32a is a convex curved surface. You may.

Further, as shown in FIG. 2, the distal end portion of the flow path tube portion 11 including the opening 11a1 on the distal end side is located on the distal end side in the axial direction A by the tip portion 32 of the first elastic valve body 30. And the outside of radial B is covered. Further, the slit 32a is also closed. That is, the first elastic valve body 30 shown in FIG. 2 shows a closed form that covers the opening 11a1.

When the inner cylinder member 20 is moved to the proximal end side in the axial direction A from the non-connected state shown in FIG. 2, the bellows cylinder portion 31 is elastically deformed so as to be compressed. Along with this, the distal end portion of the flow path tube portion 11 including the opening 11a1 on the distal end side penetrates the tip portion 32 in the axial direction A through the slit 32a of the tip portion 32 of the first elastic valve body 30. .. That is, the first elastic valve body 30 is in an open form in which the opening 11a1 is opened. As described above, the first elastic valve body 30 of the present embodiment can change its form between the closed form and the open form as the inner cylinder member 20 moves in the axial direction A with respect to the first housing 10. ..

The first elastic valve body 30 of the present embodiment is configured to include a bellows tube portion 31 and a tip portion 32, but has a closed form and an opening that covers the opening 11a1 on the distal end side of the flow path 11a of the flow path tube portion 11. The configuration is not limited to this configuration as long as the configuration can be changed from the open configuration in which 11a1 is opened. Therefore, in the first elastic valve body 30 of the present embodiment, the form can be changed between the closed form and the open form by elastically deforming the bellows tube portion 31 in the axial direction A. In addition, or instead of elastic deformation, a configuration may be configured in which the form can be switched between the closed form and the open form by moving in the axial direction A.

The hardness of the first elastic valve body 30 is preferably shore A hardness of 10 or more and 70 or less, and more preferably shore A hardness of 20 or more and 50 or less. If the hardness is smaller than Shore A hardness 10, a fluid such as a chemical solution may leak to the outside when the pressure in the flow path 11a increases. If the hardness is larger than the Shore A hardness 70, the contact between the first elastic valve body 30 and the female connector 2 connected to the second elastic valve body 50 may be insufficient, and the connected female connector 2 may be inadequate. When removed, fluid such as chemicals may leak to the outside. Further, if the hardness of the first elastic valve body 30 is shore A hardness of 20 or more and 50 or less, suitable adhesion to the female connector 2 can be ensured, and when the connected female connector 2 is removed. In addition, it is possible to more reliably suppress the leakage of a fluid such as a chemical solution to the outside.

The first elastic valve body 30 is molded and elastically deformable. Examples of the material of the first elastic valve body 30 include natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, urethane rubber, and silicone. Various rubber materials such as rubber and fluororubber, styrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, transpolyisoprene-based, fluororubber-based, chlorinated polyethylene-based, etc. Various thermoplastic elastomas are mentioned, and one or a mixture of two or more of these may be used. The first elastic valve body 30 may be formed of different materials or may be formed of the same material.

<Female connector 2>
Next, the details of the female connector 2 will be described with reference to FIGS. 1 and 2.

[Second housing 40]
As described above, the second housing 40 includes a cap 42 and a holder 43 that supports the cap 42.

The cap 42 is provided at the tubular portion 42a for partitioning the holding space 41a for accommodating the second elastic valve body 50 among the hollow portions 41, and the flange provided at the distal end portion of the tubular portion 42a and supported on the holder 43. A portion 42b and the like are provided. More specifically, the cap 42 of the present embodiment includes a top surface cap 44 and a bottom surface cap 45. Both the top surface cap 44 and the bottom surface cap 45 have a hat shape including a tubular portion and a flange portion, and the cap 42 has the top surface cap 44 and the bottom surface cap 45 overlapped with each other, and the contact surfaces of both are ultrasonically welded or the like. It is formed by joining with. That is, the tubular portion 42a of the cap 42 is composed of the tubular portions of the top surface cap 44 and the bottom surface cap 45 that are overlapped with each other. Further, the flange portion 42b of the cap 42 is composed of the flange portions in which the top surface cap 44 and the bottom surface cap 45 are overlapped with each other.

The second elastic valve body 50 is compressed and sandwiched from the top surface 50a side and the bottom surface 50b side by the top surface cap 44 and the bottom surface cap 45, and is positioned in the hollow portion 41, more specifically, in the holding space 41a. Is fixed. The flow path pipe portion 11 of the closed male connector 1 can be inserted from the outside through the slit 51 formed in the second elastic valve body 50 into the hollow portion 41 partitioned by the second housing 40.

FIG. 5 is a view of the female connector 2 as viewed from the top surface 48 side, which is the end surface of the cap 42 on the proximal end side. As shown in FIG. 5, an insertion opening 42c is formed on the top surface 48 of the cap 42. The flow path tube portion 11 of the closed male connector 1 is inserted into the hollow portion 41 through the insertion opening 42c (see FIG. 7).

A state in which the flow path tube portion 11 of the closed male connector 1 is inserted into the hollow portion 41 of the female connector 2 to complete the connection between the closed male connector 1 and the female connector 2 (hereinafter referred to as "connection completed state"). In the description), the flow path tube portion 11 is not compressed inward in the radial direction B by the edge portion 42c1 that partitions the insertion opening 42c. That is, in the connection completed state, the outer diameter of the portion of the flow path pipe portion 11 at the position of the insertion opening 42c is smaller than the diameter of the edge portion 42c1. Details of the connection completion state will be described later (see FIG. 7).

Further, as shown in FIGS. 2 and 5, a male screw portion 46 is formed on the outer surface of the tubular portion 42a of the cap 42. The thread 46a of the male thread portion 46 extends spirally to the position of the proximal end on the outer surface of the tubular portion 42a, and the proximal end of the thread 46a is a lock type conforming to ISO80369-7. It constitutes a tip flange 47 whose dimensions are specified as a female connector of the above. In other words, the tip flange 47 of the present embodiment is integrally formed with the thread 46a as a part of the thread 46a of the male thread portion 46.

Here, the "tip flange whose dimensions are specified as a lock type female connector conforming to ISO80369-7" is two at the position of the end portion in the axial direction A and at the position facing the radial direction B. It is a flange to be provided, and the maximum diameter (maximum length) of the radial direction B between the two flanges is specified to be 7.73 to 7.83 mm, and it is different from the one orthogonal to the one radial direction which is the maximum diameter. The width of each flange in one radial direction is defined as 3.4 to 3.5 mm. As shown in FIG. 5, for the tip flange 47 of the present embodiment, the maximum diameter W1 in the radial direction B is 7.83 mm (dimensional tolerance −0.005 to 0 mm). Further, as shown in FIG. 5, the width W2 of each flange in another radial direction orthogonal to the one radial direction which is the maximum diameter is 3.5 (dimensional tolerance −0.01 to 0 mm). ..

As shown in FIG. 2, the holder 43 supports the cap 42. Further, the holder 43 surrounds the male lure portion 43a for partitioning the flow path 41b communicating with the holding space 41a for which the cap 42 is partitioned, and the outer periphery of the male lure portion 43a in the radial direction B, and the female screw portion 43b1 is formed on the inner surface. It is provided with a tubular portion 43b and a cylinder portion 43b.

As the material of the holder 43, the top cap 44 and the bottom cap 45 of the second housing 40, for example, the same material as the material that can be used as the holder member 12 of the closed male connector 1 described above can be mentioned.

The second housing 40 of the present embodiment has a configuration including a holder 43, a top surface cap 44, and a bottom surface cap 45, but is not limited to this configuration, and for example, the holder 43 and the bottom surface cap 45 of the present embodiment are single. It may be a single member molded from a material. Further, any one of the holder 43, the top cap 44 and the bottom cap 45 of the present embodiment may be formed by combining a plurality of members. As described above, the second housing 40 is not limited to the configuration shown in the present embodiment, and may be composed of, for example, one member or two members, or may be composed of four or more members.

[Second elastic valve body 50]
As shown in FIG. 2, the second elastic valve body 50 is a circular flat disk-shaped valve body having a substantially circular outer shape when viewed from the top surface 50a side. The second elastic valve body 50 is sandwiched by the second housing 40 by sandwiching the top surface 50a and the bottom surface 50b, and the position in the hollow portion 41 is fixed.

Further, the second elastic valve body 50 has a slit 51 in the central portion when viewed from the top surface 50a side. The slit 51 opens and closes due to elastic deformation of the second elastic valve body 50 when the male connector is inserted into and removed from the hollow portion 41. The second elastic valve body 50 is sandwiched by the second housing 40 with the top surface 50a and the bottom surface 50b sandwiched at the position of the peripheral edge portion located radially outside the central portion where the slit 51 is formed. ..

The second elastic valve body 50 is also formed into a mold so as to be elastically deformable, as in the case of the first elastic valve body 30 of the closed male connector 1 described above. Further, as the material of the second elastic valve body 50, for example, the same material as the material that can be used as the first elastic valve body 30 of the closed male connector 1 described above can be mentioned.

The hardness of the second elastic valve body 50 is preferably such that the second elastic valve body 50 secures an appropriate elastic force. The hardness of the second elastic valve body 50 is such that the slit 51 is elastically deformable so as to open the slit 51 when the male lure portion conforming to ISO80369-7 is inserted into the hollow portion 41. Further, in a state where the male lure portion conforming to ISO80369-7 is inserted into the hollow portion 41 through the slit 51, the hardness is set so as to be in close contact with the outer wall of the male lure portion so that a liquid-tight connection state can be realized. Further, the hardness is set to be recoverable in the second housing 40 so that the slit 51 is closed when the male lure portion conforming to ISO80369-7 is removed from the hollow portion 41. The hardness of the second elastic valve body 50 is not particularly limited as long as the hardness maintains such performance, but in the present embodiment, the hardness is 20 to 60 ° (A hardness).

The male lure portion 43a of the holder 43 of the female connector 2 conforms to ISO80369-7 and has a tapered shape of 6/100.

Further, in the present embodiment, the female connector 2 includes the second elastic valve body 50, but a female connector that does not have the second elastic valve body 50 may be used.

<Connection operation between the closed male connector 1 and the female connector 2>
Next, the operation of each part when connecting the closed male connector 1 and the female connector 2 will be described. FIG. 6 is a cross-sectional view showing a state in which the closed male connector 1 and the female connector 2 are connected. Further, FIG. 7 is a cross-sectional view showing a state in which the connection of the closed male connector 1 and the female connector 2 is further advanced from the state of FIG. 6 and the connection of the closed male connector 1 and the female connector 2 is completed. More specifically, FIG. 6 shows a contact state in which the first elastic valve body 30 of the closed male connector 1 abuts on the edge portion 42c1 of the insertion opening 42c of the female connector 2, but the flow path tube portion 11 is a female. It shows a state in the middle of connection which is not connected to the flow path 41b of the connector 2. Further, FIG. 7 shows a contact state, and the flow path pipe portion 11 of the closed male connector 1 penetrates the first elastic valve body 30 and the second elastic valve body 50 to flow the female connector 2. It communicates with the road 41b and shows the connection completion state in which the connection is completed. In FIG. 7, the connector connecting body 300 is composed of the closed male connector 1 and the female connector 2.

From the unconnected state shown in FIG. 2, the closed male connector 1 and the female connector 2 are brought closer to the axial direction A, and the female connector 2 is relative to the closed male connector 1 in a clockwise direction (see the white arrow in FIG. 2). When the female connector 2 is rotated, the male screw portion 46 including the tip flange 47 of the female connector 2 can be screwed into the female screw portion 21a of the closed male connector 1. As a result, the closed male connector 1 and the female connector 2 can be screwed together. The central axis O of the closed male connector 1 and the central axis O'of the female connector 2 are in a substantially coincident state.

As shown in FIG. 6, when the male screw portion 46 including the tip flange 47 of the female connector 2 and the female screw portion 21a of the closed male connector 1 are screwed, the distal end opening 23a of the holding cylinder portion 23 is used. The tip surface 34a of the protruding portion 34 of the protruding first elastic valve body 30 abuts on the top surface 50a of the second elastic valve body 50 to form a contact region 60. Further, as shown in FIG. 6, the tip surface 34a of the protruding portion 34 abuts on the edge portion 42c1 of the insertion opening 42c in the entire circumferential direction C. As a result, it is possible to prevent the liquid from leaking to the outside from the position of the edge portion 42c1, and it is possible to secure the sealing property at the position of the edge portion 42c1.

The contact region 60 need not be formed so as to include the entire surface of the tip surface 34a of the protruding portion 34 of the first elastic valve body 30. Further, the contact region 60 does not need to be formed so as to include the entire surface of the top surface 50a of the second elastic valve body 50. That is, it suffices that the portions of the tip surface 34a and the top surface 50a through which the flow path tube portion 11 passes are at least in contact with each other to form a contact region. In the present embodiment, the periphery of the slit 32a of the first elastic valve body 30 and the periphery of the slit 51 of the second elastic valve body 50 may be at least in contact with each other to form the contact region 60.

Further, the protrusion 18a as the locking portion remains in the locked position fitted in the annular groove 24a from the non-connected state shown in FIG. 2 to the connecting intermediate state shown in FIG. .. That is, the inner cylinder member 20 is rotated in the circumferential direction C with respect to the first housing 10 from the non-connected state (see FIG. 2) to the connected intermediate state (see FIG. 6) in which the contact state is realized. It does not move in the axial direction A.

The contact state (see FIG. 6) in the present embodiment is also a state in which the distal end of the connection cylinder portion 21 of the inner cylinder member 20 is in contact with the flange portion 42b of the cap 42 of the female connector 2. In other words, the male screw portion 46 and the female screw portion 21a are screwed together until the distal end of the connection cylinder portion 21 of the inner cylinder member 20 abuts on the flange portion 42b of the cap 42 of the female connector 2. It may be used as a mark that can be confirmed from the outside that the state has been realized.

Instead of the configuration in which the distal end of the inner cylinder member 20 abuts on the flange portion 42b of the cap 42 of the female connector 2 to realize the contact state (see FIG. 6), the distal end of the holding cylinder portion 23 is a female. The configuration may be such that the contact state is realized by abutting on the top surface 48 including the edge portion 42c1 of the cap 42 of the connector 2.

From the connection intermediate state shown in FIG. 6, the female connector 2 is further rotated clockwise with respect to the closed male connector 1 (see the white arrow in FIG. 6). Then, since the distal end of the inner cylinder member 20 is in contact with the flange portion 42b of the cap 42 of the female connector 2, the inner cylinder member 20 is integrated with the female connector 2 in the first housing 10. Attempts to rotate clockwise relative to the outer cylinder member 13. Therefore, the fitted state between the protrusion 18a as the locking portion and the annular groove 24a is released. In other words, the protrusion 18a as the locking portion maintained a contact state (see FIG. 6) in which the first elastic valve body 30 of the closed male connector 1 abuts on the edge portion 42c1 of the insertion opening 42c of the female connector 2. As it is, the inner cylinder member 20 is locked and the inner cylinder member 20 is unlocked from the locking position that restricts the movement, and the inner cylinder member 20 is displaced to the unlocked position that allows the movement of the inner cylinder member 20. More specifically, as shown in FIGS. 2 and 6, the end face of the protrusion 18a on the distal end side is inclined toward the proximal end side toward the inside of the radial direction B. Therefore, the inclined end face is pressed outward in the radial direction B by the inner cylinder member 20 that tends to advance toward the proximal end side in the axial direction A. Then, the deformed portion 18 is elastically deformed outward in the radial direction B so that the protrusion 18a comes out of the annular groove 24a. In this way, the protrusion 18a can be moved from the locking position to the unlocking position.

After the protrusion 18a is displaced to the unlocked position, when the female connector 2 is further rotated clockwise relative to the closed male connector 1, the convex portion 21b formed on the outer wall of the inner cylinder member 20 ( (See FIG. 4) moves from the distal end side to the proximal end side along the spiral groove 13a1 formed in the inner wall of the outer cylinder member 13. As a result, the inner cylinder member 20 can be moved to the proximal end side in the axial direction A relative to the outer cylinder member 13. More specifically, the inner cylinder member 20 comes into contact with the holder member 12 from the first position (see FIGS. 2 and 6) locked to the protrusion 18a as the locking portion (see FIG. 7). Moves in the axial direction A with respect to the first housing 10 until.

As a result, the flow path tube portion 11 is the first elastic valve body 30 while maintaining the contact state in which the first elastic valve body 30 of the closed male connector 1 is in contact with the edge portion 42c1 of the insertion opening 42c of the female connector 2. From the state where the opening 11a1 is closed to the first elastic valve body 30 without penetrating the first elastic valve body 30 (see FIG. 6), the flow path tube portion 11 penetrates the first elastic valve body 30 and the opening 11a1 is the first elastic valve body. The form can be changed from 30 to a state of being released. More specifically, the inner cylinder member 20 moves toward the proximal end side with respect to the outer cylinder member 13 from the connection intermediate state shown in FIG. 6, so that the flow path pipe portion is maintained in the contact state. 11 penetrates the first elastic valve body 30 and the second elastic valve body 50. As a result, as shown in FIG. 7, a connection complete state is realized in which the flow path 11a of the flow path tube portion 11 of the closed male connector 1 is in liquidtight communication with the flow path 41b of the female connector 2.

On the contrary, when the female connector 2 is rotated counterclockwise relative to the closed male connector 1 (in the opposite direction of the white arrow in FIG. 7) in the connection completed state shown in FIG. 7, the inner cylinder member 20 is rotated. By moving the convex portion 21b (see FIG. 4) along the spiral groove 13a1, the convex portion 21b is integrally separated from the first housing 10 in the axial direction A while maintaining the contact state. Move in the direction. As a result, the inner cylinder member 20 changes from the connection complete state shown in FIG. 7 to the connection intermediate state shown in FIG. That is, the flow path pipe portion 11 is removed from the second elastic valve body 50 through the contact region 60. Further, the first elastic valve body 30 changes its form from an open form in which the opening 11a1 on the distal end side of the flow path 11a of the flow path tube portion 11 is opened to a closed form in which the opening 11a1 is covered. In this way, the connection completed state shown in FIG. 7 is shifted to the connection intermediate state shown in FIG.

In the connection completed state shown in FIG. 7, the first elastic valve body 30 is compressed in the axial direction A by moving the inner cylinder member 20 toward the proximal end side, and the inner cylinder member 20 is compressed at the distal end by the restoring force. It is urging to the side. Therefore, when changing from the connection complete state shown in FIG. 7 to the connection intermediate state shown in FIG. 6, a weak external force is applied as compared with the case of changing from the connection intermediate state shown in FIG. 6 to the connection complete state shown in FIG. The state can be changed by adding it. Then, when the annular groove 24a of the inner cylinder member 20 reaches the position of the protrusion 18a of the outer cylinder member 13, the protrusion 18a fits into the annular groove 24a and becomes a locking position.

When the female connector 2 is further rotated counterclockwise (in the opposite direction of the white arrow in FIG. 6) relative to the closed male connector 1 from the connection intermediate state shown in FIG. 6, the inner cylinder member 20 has the protrusion 18a. Since the movement of the outer cylinder member 13 of the first housing 10 is restricted via the above, the male screw portion 46 of the female connector 2 and the female screw portion 21a of the inner cylinder member 20 of the closed male connector 1 are screwed together. Rotate in the loosening direction. As a result, the female connector 2 moves in a direction (upward in FIG. 6) that is relatively separated from the inner cylinder member 20 in the axial direction A. More specifically, the protrusion 18a has a plane on the end face on the proximal end side that is substantially parallel to the radial direction. Therefore, even the inner cylinder member 20 that tends to move toward the distal end side is not pushed out of the radial direction B and remains in the locked position. At this time, the contact between the top surface 50a of the second elastic valve body 50 of the female connector 2 and the tip surface 34a of the first elastic valve body 30 of the closed male connector 1 is released. That is, the contact area 60 disappears. Further, the contact between the tip surface 34a of the protruding portion 34 and the entire peripheral direction C of the edge portion 42c1 of the insertion opening 42c is also released. Then, the male screw portion 46 of the female connector 2 and the female screw portion 21a of the inner cylinder member 20 of the closed male connector 1 are released from screwing, and the female connector 2 is placed on the distal end side relative to the inner cylinder member 20. By pulling it out, it becomes a non-connected state as shown in FIG.

As described above, according to the closed male connector 1 and the female connector 2, at the time of connection, the tip surface 34a of the protruding portion 34 and the entire circumferential direction C of the edge portion 42c1 of the insertion opening 42c come into contact with each other. The flow path tube portion 11 can be inserted into the hollow portion 41 of the female connector 2 while maintaining the state. Further, according to the closed male connector 1 and the female connector 2, the flow path tube portion 11 can be removed from the hollow portion 41 of the female connector 2 while maintaining the contact state even when the connection is disconnected. Therefore, the closed male connector 1 and the female connector 2 can be communicated with each other in a liquid-tight manner.

Further, according to the closed male connector 1 and the female connector 2 of the present embodiment, the top surface 50a of the second elastic valve body 50 of the female connector 2 and the first elastic valve body 30 of the closed male connector 1 at the time of connection. The flow path tube portion 11 can be inserted into the hollow portion 41 of the female connector 2 through the contact region 60 with the tip surface 34a. Further, according to the closed male connector 1 and the female connector 2 of the present embodiment, the flow path tube portion 11 can be removed from the hollow portion 41 of the female connector 2 through the contact region 60 even when the connection is disconnected. can. In this way, the flow path tube portion 11 can be inserted and removed through the contact region 60. Therefore, when the closed male connector 1 and the female connector 2 are changed from the connection completed state (see FIG. 7) to the disconnected state (see FIG. 2), that is, when the connection between the two is disconnected, they are exposed to the outside after disconnection. Suppresses that liquid droplets such as chemicals remain on the top surface 50a of the second elastic valve body 50 of the female connector 2 and the tip surface 34a of the first elastic valve body 30 of the closed male connector 1. be able to. That is, it is possible to reduce the risk that the medical staff will come into contact with a liquid such as a chemical solution.

<Female threaded portion 21a of the closed male connector 1 and male threaded portion 46 of the female connector 2>
As described above, the contact state in which the tip surface 34a of the protruding portion 34 and the entire circumferential direction C of the edge portion 42c1 of the insertion opening 42c abut is in contact with the female screw portion 21a of the closed male connector 1 and the female connector 2. It is realized by maintaining the screw connection with the male screw portion 46. Hereinafter, the details of the female threaded portion 21a and the male threaded portion 46, which have a structure in which the screw coupling is easily maintained, will be described in detail.

FIG. 8 is an enlarged cross-sectional view of the female screw portion 21a and the male screw portion 46 in FIG. 2. Further, FIG. 9 is an enlarged cross-sectional view of the female screw portion 21a and the male screw portion 46 in FIG. 7.

As shown in FIG. 9, the female threaded portion 21a is screwed with the male threaded portion 46 including the tip flange 47 integrally formed at the end portion on the proximal end side, and the first elastic valve body 30 is attached to the female connector 2. It is in a contact state in which it is in contact with the edge portion 42c1 of the insertion opening 42c. The valley portion 29a of the female screw portion 21a sandwiches the tip flange 47 in the state shown in FIG. More specifically, the valley portion 29a of the present embodiment is in contact with two tip flanges 47 provided at positions facing each other in the radial direction B from the outside in the radial direction B. Therefore, a frictional resistance is generated between the valley portion 29a and the tip flange 47 as compared with a configuration in which the two are not in contact with each other. As a result, it is possible to suppress the rotation of the tip flange 47 relative to the valley portion 29a, and to prevent the screw between the female screw portion 21a and the tip flange 47 from being loosened or released.

In particular, the valley portion 29a of the present embodiment compresses the two tip flanges 47 with a pressure equal to or higher than a predetermined value toward the inside of the radial direction B, that is, the opposite direction of the two tip flanges 47. Therefore, the frictional resistance between the valley portion 29a and the tip flange 47 can be made larger than that in a state where the two are simply in contact with each other without pressing each other. That is, it is possible to make it even more difficult for the female screw portion 21a and the tip flange 47 to loosen or release the screw.

In other words, the valley portion 29a of the present embodiment shown in FIG. 8 includes a sandwiching portion 29a1 having a valley diameter D2 smaller than the maximum rotation outer diameter D1 defined by the rotation locus of the tip flange 47. At least a part of the sandwiching portion 29a1 is located outside the radial direction B with respect to the tip flange 47 in the contact state shown in FIG. That is, the tip flange 47 is compressed toward the inside in the radial direction B by the sandwiching portion 29a1 in the contact state shown in FIG. As shown in FIG. 5, the “maximum rotation outer diameter D1” of the tip flange 47 is the outermost diameter direction B of the tip flange 47 whose dimensions are specified as a lock type female connector conforming to ISO80369-7. The point Q located at is the diameter of the locus formed by rotating around the central axis of the tubular portion 42a that coincides with the central axis O'of the entire female connector 2. That is, the length is equal to the maximum diameter W1 shown in FIG.

As shown in FIG. 9, the tip flange 47 of the present embodiment is pressed inward in the radial direction B by the sandwiching portion 29a1 and is compressed and deformed.

Further, as shown in FIGS. 8 and 9, the valley portion 29a of the present embodiment is located on the distal end side of the sandwiching portion 29a1 and has a valley diameter D3 having a maximum rotation outer diameter D1 or more of the tip flange 47. It is provided with a non-pinching portion 29a2 having. The valley portion 29a on the distal end side of the sandwiched portion 29a1 is composed of only the non-sandwiched portion 29a2. With such a configuration, when the tip flange 47 is screwed into the female thread portion 21a, the tip flange 47 is compressed by the valley portion 29a during the screwing before reaching the contact state shown in FIG. Can be suppressed, and operability at the time of connection can be improved.

Further, in the present embodiment, the valley diameter D3 of the non-sandwiched portion 29a2 gradually increases from the proximal end side to the distal end side. Therefore, the tip flange 47 is likely to fit in the valley portion 29a at the start of screwing between the tip flange 47 and the female thread portion 21a. That is, the engagement between the tip flange 47, which triggers the start of screwing, and the valley portion 29a of the female thread portion 21a can be easily realized, and the operability at the time of connection can be further improved.

Furthermore, in the present embodiment, the valley diameter D2 of the sandwiching portion 29a1 also gradually increases from the proximal end side to the distal end side. By doing so, when the tip flange 47 is screwed into the female thread portion 21a, the tip flange 47 is more strongly compressed from the valley portion 29a as it approaches the contact state shown in FIG. Therefore, it is possible to prevent the tip flange 47 from being excessively and unnecessarily compressed before the contact state shown in FIG. 9 is reached. As a result, the operability at the time of connection can be further improved.

The female thread portion 21a includes a thread portion 29b composed of threads in addition to the above-mentioned valley portion 29a composed of a portion between adjacent threads. Then, as shown in FIG. 8, the screw height H1 at the position adjacent to the sandwiching portion 29a1 of the valley portion 29a in the mountain portion 29b of the female screw portion 21a is smaller than the protruding height H2 of the tip flange 47. .. The screw height H1 means the height in the radial direction B with respect to the position of the thread adjacent to the sandwiching portion 29a1 in the axial direction A, which is the minimum outer diameter of the adjacent sandwiching portion 29a1. Further, the protruding height H2 of the tip flange 47 means the maximum height of the tip flange 47 in the radial direction B with respect to the peripheral surface at a position adjacent to the tip flange 47 in the tubular portion 42a on which the tip flange 47 is formed. is doing.

As described above, the first elastic valve body 30 includes a protrusion 34 protruding from the distal end opening 23a. Then, as shown in FIG. 8, the protruding portion 34 of the present embodiment has an outer diameter D5 larger than the diameter D4 of the insertion opening 42c of the female connector 2. The outer diameter D5 of the protruding portion 34 means the outer diameter of the outer edge of the protruding portion 34 when the protruding portion 34 is viewed from the tip surface 34a side. With such a configuration, when the female connector 2 is connected, the protruding portion 34 easily comes into contact with the entire circumferential direction C of the edge portion 42c1 of the insertion opening 42c of the female connector 2. That is, the contact state shown in FIG. 9 can be easily realized.

In the present embodiment, the tip flange 47 is formed as a part of the proximal end side of the male screw portion 46 provided on the outer wall of the tubular portion 42a, but as a lock type female connector conforming to ISO80369-7. It suffices if there is a tip flange with specified dimensions, and the configuration is not limited to this. Therefore, for example, only the tip flange 47 may be formed at the position of the proximal end of the outer wall of the tubular portion 42a.

Further, in the present embodiment, similar to the valley diameter D2 of the sandwiched portion 29a1 of the valley portion 29a and the valley diameter D3 of the non-sandwiched portion 29a2, the peak diameter of the mountain portion 29b is also from the proximal end side to the distal end side. The configuration is such that the diameter gradually increases toward the direction, but the configuration is not limited to this, and the peak diameter of the mountain portion may be constant regardless of the position in the axial direction A.

According to the female thread portion 21a of the present embodiment, as described above, the valley portion 29a sandwiches the tip flange 47, so that the connection complete state is easily maintained. On the other hand, if the tip flange 47 is sandwiched by the valley portion 29a before the contact state shown in FIG. 9 at the time of connection, the contact state is realized depending on the magnitude of the compressive force of the sandwiching. There is a possibility that the rotation of the inner cylinder member 20 with respect to the outer cylinder member 13 may be started before the rotation is performed. Then, the flow path tube portion 11 may be inserted into the hollow portion 41 of the female connector 2 without realizing the contact state. Similarly, the flow path pipe portion 11 may be removed from the hollow portion 41 without realizing the contact state. In such a case, since the flow path tube portion 11 is inserted and removed in a situation where the contact state is not realized, the liquid easily leaks to the outside from the insertion opening 42c.

Therefore, it is desirable to have a configuration that can more reliably realize the contact state shown in FIG. FIG. 10 is a cross-sectional view of a single closed male connector 1 ′ as a modification of the closed male connector 1 described above. The cross section of the closed male connector 1'shown in FIG. 10 is a cross section at the same position as the cross section of the closed male connector 1 shown in FIG. In the closed male connector 1'shown in FIG. 10, similarly to the closed male connector 1 described above, the first elastic valve body 30 moves with the movement of the inner cylinder member 20'with respect to the first housing 10 in the axial direction A. , The form can be changed between the closed form and the open form. The inner cylinder member 20'is provided so as to be able to project from the distal end of the first housing 10, and more specifically, in the example shown in FIG. 10, the distal end of the outer cylinder member 13. In the closed male connector 1'shown in FIG. 10, the projectable length L1 of the inner cylinder member 20'is equal to or more than the movable length L2 of the inner cylinder member 20'in the axial direction A with respect to the first housing 10. There is.

That is, the inner cylinder member 20'is always in a state of protruding from the distal end of the first housing 10. With such a configuration, even if the inner cylinder member 20'moves toward the proximal end side in the axial direction A with respect to the first housing 10 before the contact state is realized, this movement is inward. The tubular member 20'stops in a state of protruding from the distal end of the first housing 10. That is, after the inner cylinder member 20'moves to the proximal end side in the axial direction A with respect to the first housing 10, the female connector 2 (see FIGS. 8, 9, etc.) is further closed-type male connector 1. When rotated with respect to ‘ can. As a result, the male screw portion 46 and the female screw portion 21a'are screwed until the flange portion 42b of the female connector 2 (see FIGS. 8 and 9) abuts on the distal end of the connection cylinder portion 21'of the inner cylinder member 20'. Can be made to. That is, even if the inner cylinder member 20'begins to rotate with respect to the first housing 10 without realizing the contact state, after the movement of the inner cylinder member 20'with respect to the first housing 10 is completed, A contact state can be realized.

More specifically, the inner cylinder member 20'shown in FIG. 10 comes into contact with the holder member 12 from the first position (see FIG. 10) locked to the protrusion 18a as the locking portion of the first housing 10. It is movable in the axial direction A with respect to the first housing 10 up to two positions. The above-mentioned projectable length L1 in the example shown in FIG. 10 is the projecting length of the inner cylinder member 20'in a state where the inner cylinder member 20'is locked to the protrusion 18a as a locking portion (see FIG. 10). Means that. Further, the second position of the inner cylinder member 20'is proximal to the convex portion 21b' provided on the outer wall of the inner cylinder member 20'(similar to the'convex portion 21b'in FIGS. 4 and 7). The end surface is a position where the end surface of the holder member 12 abuts on the distal end surface of the protrusion 16. In FIG. 10, the position in the axial direction A of the proximal end of the inner cylinder member 20'in the state where the inner cylinder member 20'is in the first position is shown by the alternate long and short dash line X1. Further, in FIG. 10, the position in the axial direction A of the proximal end of the inner cylinder member 20'in the state where the inner cylinder member 20'is in the second position is shown by the alternate long and short dash line X2. In other words, the distance between the two-dot chain line X1 and the two-dot chain line X2 in the axial direction A is the above-mentioned movable length L2.

<Infusion set 100>
Finally, the infusion set 100 including the closed male connector 1 as the medical connector described above will be described. FIG. 11 is a diagram showing how an infusion set 100 having a closed male connector 1 is connected to another infusion set 110 having the female connector 2 described above. The infusion set 100 and another infusion set 110 are used to administer a liquid such as a drug solution to a living body. As shown in FIG. 11, the infusion set 100 includes a connector 102 connected to the liquid container 200, a closed male connector 1 located on the downstream side (distal end side) of the connector 102, and a connector. It includes a medical tube 103 that connects the 102 and the closed male connector 1. Further, a clamp 104 may be attached in the middle of the medical tube 103 to close the portion. The clamp 104 is configured to press the medical tube 103 so as to sandwich it from the outside and press-close the inside of the medical tube 103.

In the infusion set 100 having such a configuration, with the clamp 104 removed, a liquid such as a chemical solution in the liquid container 200 flows from the connecting device 102 into the closed male connector 1 through the medical tube 103. Then, when the closed male connector 1 is connected to another infusion set 110 having the female connector 2 described above as a mixed injection port via the female connector 2, the closed male connector 1 flows into the closed male connector 1. The liquid passes through the closed male connector 1 and the female connector 2, flows into another infusion set 110, and is supplied to the living body.

The connecting device 102 has a first connecting portion 105 located at the proximal end and connected to the liquid container 200, and a second connecting portion 106 located at the distal end and connected to the medical tube 103. A third connecting portion 107, which is provided so as to project laterally from the outer wall and to which a syringe is connected, is provided. In the connecting device 102, a main flow path that communicates from the first connecting portion 105 to the second connecting portion 106 and can transport the liquid in the liquid container 200 to the medical tube 103, and the first connecting portion 105 and the first A sub-channel that communicates with the three connecting portions 107 and allows the liquid to be transported between the liquid container 200 and the syringe connected to the third connecting portion 107 is partitioned.

Therefore, for example, by connecting the syringe containing the drug solution containing the anticancer agent to the third connection portion 107 of the connecting device 102, the drug solution in the syringe is transferred to the liquid container 200 via the sub-flow path of the connecting device 102. Can be transported with. Then, the chemical solution containing the anticancer agent contained in the liquid container 200 is supplied to the closed male connector 1 through the main flow path of the connecting device 102 and the medical tube 103.

As described above, the female connector 2 is connected to the distal end side of the closed male connector 1 and the drug solution containing the anticancer drug is supplied into another infusion set 110 to administer the drug solution containing the anticancer drug to the living body. be able to. Then, when the administration of the chemical solution is completed and the connection between the closed male connector 1 and the female connector 2 is released, the first elastic valve body 30 of the closed male connector 1 is closed, so that the closed male connector 1 is closed. The leakage of the drug solution containing the anticancer drug from the distal end is suppressed.

Here, the infusion set 100 is exemplified as a medical device provided with the closed male connector 1, but the closed male connector 1 can be used not only for the infusion set but also for other medical devices. For example, a syringe may be provided with a closed male connector 1 at the tip of the syringe body. In such a case, for example, the third connection portion 107 of the connection device 102 described above may have the same configuration as the female connector 2, and the syringe provided with the closed male connector 1 may be connected to the third connection portion 107. good.

The medical connector according to the present invention is not limited to the specific configuration shown in the above-described embodiment, and can be variously modified or modified as long as it does not deviate from the gist of the invention described in the claims. For example, in the closed male connector 1 as the medical connector of the above-described embodiment, the groove 13a1 extending spirally is formed on the inner wall of the outer cylinder member 13, and the outer cylinder member 13 is formed on the outer wall of the inner cylinder member 20. A convex portion 21b that moves in the groove 13a1 is formed by moving the inner cylinder member 20 relatively in the circumferential direction C, but the configuration is not limited to this. A groove extending spirally may be provided on the outer wall of the inner cylinder member 20, and a convex portion moving in the groove may be formed on the inner wall of the outer cylinder member.

This disclosure relates to medical connectors.

1, 1': Closed male connector (medical connector)
2: Female connector 10: First housing 11: Flow tube portion 11a: Flow path 11a1: Distal end side opening 11a2: Proximal end side opening 12: Holder member 13: Outer cylinder member 13a: Male thread portion 13a1: Groove 14: Flange part 15: Connection part 15a: Hollow part 16: Protruding part 17: Gap 18: Deformed part 18a: Protrusion (locking part)
20, 20': Inner cylinder member 21, 21': Connection cylinder portion 21a, 21a': Female thread portion 21b: Convex portion 22: First annular flange portion 23: Holding cylinder portion 23a: Distal end opening 24: Thin cylinder portion 24a: annular groove 25: second annular flange portion 26: base end tubular portion 27: accommodation space 28: protrusion 29a: valley portion 29a1: sandwiching portion 29a2: non-pinching portion 29b: mountain portion 30: first elastic valve body 31: Bellows tube 32: Tip 32a: Slit 33: Flange 34: Projection 34a: Tip surface 40: Second housing 41: Hollow 41a: Holding space 41b: Flow path 42: Cap 42a: Tube 42b: Flange portion 42c: Insertion opening 42c1: Edge portion 43: Holder 43a: Osluer portion 43b: Tube portion 43b1: Female threaded portion 44: Top surface cap 45: Bottom cap 46: Male threaded portion 46a: Thread 47: Tip flange 48: Top surface 50: Second elastic valve body 50a: Top surface 50b: Bottom surface 51: Slit 60: Contact area 100: Infusion set 102: Connection device 103: Medical tube 104: Clamp 105: First connection part 106: Second connection part 107: Third connection part 110: Infusion set 200: Liquid container 300: Connector connection body A: Axial direction of flow path pipe part and inner cylinder member B: Circular direction of flow path pipe part and inner cylinder member C: Flow path pipe Circumferential direction D1: maximum rotation outer diameter defined by the rotation locus of the tip flange D2: valley diameter of the sandwiched portion D3: valley diameter of the non-sandwiched portion D4: diameter of the insertion opening of the female connector D5: Outer diameter H1: Screw height H2: Protruding height L1: Protrudable length L2: Movable length O: Center axis of inner cylinder member O': Center of female connector Axial line Q: Point W located on the outermost side in the radial direction of the tip flange W1: Maximum diameter W2 of the tip flange: Width X of each flange X1: Axial direction A of the proximal end when the inner cylinder member is in the first position Position X2: A position in the axial direction A of the proximal end when the inner cylinder member is in the second position.

Claims (9)

Inner cylinder member and
A housing that holds the inner cylinder member so as to be movable in the axial direction of the inner cylinder member is provided.
The housing comprises a flow path tube that can be inserted into the insertion opening of an ISO 80369-7 compliant locking female connector.
The inner cylinder member includes a connection cylinder portion that covers the radial circumference of the flow path pipe portion and has a female screw portion that can be screwed into the tip flange of the female connector.
In the connection tube portion, an elastic valve body that can change its form between a closed form that covers the opening on the distal end side of the flow path of the flow path tube portion and an open form that opens the opening is provided.
The female thread portion includes a valley portion that sandwiches the tip flange in a contact state in which the elastic valve body is screwed with the tip flange and the elastic valve body is brought into contact with the edge portion of the insertion opening of the female connector .
The elastic valve body can change its form between the closed form and the open form as the inner cylinder member moves with respect to the housing in the axial direction.
The inner cylinder member is a medical connector provided so as to project from the distal end of the housing . The valley portion is located at a sandwiching portion having a valley diameter smaller than the maximum rotation outer diameter defined by the rotation locus of the tip flange and on the distal end side of the sandwiching portion, and is located outside the maximum rotation. With a non-pinching part having a valley diameter larger than the diameter,
The medical connector according to claim 1, wherein the distal end side of the valley portion from the sandwiched portion is composed of only the non-pinched portion. The medical connector according to claim 2, wherein the valley diameter of the non-pinched portion gradually increases from the proximal end side to the distal end side. The medical connector according to claim 2 or 3, wherein the valley diameter of the sandwiching portion gradually increases from the proximal end side to the distal end side. The medical connector according to any one of claims 2 to 4, wherein the thread height of the female thread portion at a position adjacent to the sandwiching portion is smaller than the protruding length of the tip flange. A holding cylinder portion located inside the connection cylinder portion and holding the elastic valve body inside is provided.
The elastic valve body comprises a protrusion having an outer diameter larger than the diameter of the insertion opening of the female connector, which protrudes from the distal end opening formed at the distal end of the holding cylinder portion. The medical connector according to any one of 5. One of claims 1 to 6, wherein the projectable length of the inner cylinder member from the distal end of the housing is equal to or greater than the axially movable length of the inner cylinder member with respect to the housing. Medical connector described in. The housing includes a holder member including the flow path tube portion, and an outer cylinder member attached to the holder member while surrounding the radial circumference of the flow path tube portion.
The outer cylinder member includes a locking portion that locks the inner cylinder member at a predetermined position separated from the holder member.
Claims 1 to 7 wherein the inner cylinder member can move in the axial direction with respect to the housing from a first position locked to the locking portion to a second position abutting on the holder member. The medical connector according to any one of. A spirally extending groove is formed on one of the outer wall of the inner cylinder member and the inner wall of the outer cylinder member.
On the other side of the outer wall of the inner cylinder member and the inner wall of the outer cylinder member, a convex portion that moves in the groove is formed by moving the inner cylinder member relative to the outer cylinder member in the circumferential direction. The medical connector according to claim 8.

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