Male connector and medical appliance

Abstract

To provide a male connector which improves stability of connection with a female connector and suppresses leakage of a liquid such as a medical fluid to the outside when the connection with the female connector is cancelled, and a medical appliance comprising the male connector.SOLUTION: The male connector according to the present disclosure is capable of being connected to a female connector equipped with an elastic valve element, and comprises: a housing; a flow passage pipe member which has an opening formed therein; and a valve element. The housing comprises: a housing body; and a transfer body that deforms or transfers the valve element so as to undergo a configurational change between a first configuration in which the opening of the flow passage pipe member is closed by the valve element and a second configuration in which the opening of the flow passage pipe member is released from the valve element. The transfer body is provided with a first locking part capable of locking the female connector in the first configuration. The housing body is provided with a second locking part capable of locking the female connector in the second configuration.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a male connector and a medical device.

Background Art

[0002] When performing infusion on a patient, it is necessary to form a path (infusion line) for transporting a fluid such as a chemical solution. The infusion line is generally formed by connecting an infusion tube or the like. In addition, when injecting a fluid such as a chemical solution to be administered to a patient into a chemical solution bag, it is necessary to connect the chemical solution bag and a syringe or the like. In order to detachably interconnect different members in this way, male connectors and female connectors are used.

[0003] Among chemical solutions, there are chemical solutions containing drugs designated as highly toxic drugs such as anticancer drugs, and medical staff need to take sufficient care so that fluids such as such dangerous chemical solutions do not adhere to fingers or the like during the attachment and detachment operations of male connectors and female connectors.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Patent Document 1 discloses a male connector having a configuration capable of suppressing leakage of a fluid such as a chemical solution to the outside when disconnecting from a female connector. According to the male connector described in Patent Document 1, it is possible to suppress a liquid such as a chemical solution from adhering to the finger of a medical staff.

[0006] The male connector described in Patent Document 1 has room for further improvement from the viewpoint of connection stability with a female connector.

[0007] The present disclosure aims to provide a male connector capable of improving connection stability with a female connector and suppressing leakage of fluid such as a chemical solution to the outside when disconnecting from the female connector, and a medical device including the male connector.

Means for Solving the Problems

[0008] The male connector according to the first aspect of the present disclosure is a male connector connectable to a female connector including an elastic valve body, and includes a housing partitioning a hollow portion, a flow path pipe member extending in the hollow portion and having an opening formed at one end side in the extending direction, and a valve body located in the hollow portion and capable of closing the opening of the flow path pipe member. The housing includes a housing main body and a moving body that deforms or moves the valve body so that the housing main body changes its form between a first form in which the opening of the flow path pipe member is closed by the valve body and a second form in which the opening of the flow path pipe member is released from the valve body by moving in the extending direction with respect to the housing main body. The moving body includes a first locking portion capable of locking the female connector in a state where the valve body and the elastic valve body of the female connector are in contact with each other in the first form. The housing main body includes a second locking portion capable of locking the female connector in a state where the first locking portion locks the female connector in the second form.

[0009] In one embodiment of the present disclosure, only one or a plurality of the first locking portions of the moving body are provided at intervals in the circumferential direction of the flow path pipe member.

[0010] In one embodiment of the present disclosure, the first locking portion of the moving body is movable in the radial direction of the flow path pipe member when the moving body moves in the extending direction with respect to the housing main body.

[0011] In one embodiment of the present disclosure, only one or a plurality of the second locking portions of the housing main body are provided at intervals in the circumferential direction of the flow path pipe member.

[0012] As one embodiment of the present disclosure, when the state in which the second locking portion of the housing body locks the female connector is released, the restoring force of the deformed valve body or the biasing force of a biasing member that biases the valve body or the moving body toward the one end side in the extending direction causes the moving body to move in the extending direction with respect to the housing body, and the form changes from the second form to the first form.

[0013] As one embodiment of the present disclosure, after the form changes from the second form to the first form, due to the restoring force or the biasing force, the moving body continues to move in the extending direction with respect to the housing body, whereby the state in which the first locking portion locks the female connector is released.

[0014] As one embodiment of the present disclosure, the moving body includes a first moving body and a second moving body that are relatively movable in the extending direction, and the second moving body is movable in the extending direction with respect to the first moving body and the housing body while being locked so that the first moving body does not move in the extending direction with respect to the housing body.

[0015] A medical instrument as a second aspect of the present disclosure includes the male connector described above.

Advantages of the Invention

[0016] According to the present disclosure, it is possible to provide a male connector that improves connection stability with a female connector and suppresses leakage of a fluid such as a chemical solution to the outside when the connection with the female connector is released, and a medical instrument including this male connector.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the male connector and the medical device according to the present disclosure will be illustrated and described with reference to the drawings. The same reference numerals are given to the common configurations in each figure.

[0019] FIG. 1 is a perspective view showing a male connector 1 as an embodiment of the male connector according to the present disclosure and a female connector 2 connectable to the male connector 1. The male connector 1 of the present embodiment is a so-called "closed male connector" in which a flow path tube body 46 (see FIG. 4 etc.), which will be described later as a male tube, is not exposed to the outside when not connected to the female connector 2.

[0020] FIGS. 2 and 3 are side views of the male connector 1 and the female connector 2 shown in FIG. 1. FIGS. 2 and 3 are side views seen from different positions. FIG. 4 is a cross-sectional view taken along line I-I of FIG. 2. FIG. 5 is a cross-sectional view taken along line II-II of FIG. 3. The male connector 1 and the female connector 2 shown in FIGS. 1 to 5 show their respective single states before being connected to each other (hereinafter simply referred to as the "state before connection"). Although details will be described later, the male connector 1 and the female connector 2 of the present embodiment can be connected only by an operation of approaching each other in the extending direction A of the flow path tube member 40 from the state shown in FIG. 1. Hereinafter, in the male connector 1 and the female connector 2 according to the present embodiment, one end side that becomes the downstream side of the flow path of a fluid such as a chemical solution in the infusion line (right direction in FIG. 1, upward direction in FIGS. 2 to 5) is referred to as the "distal side", and the other end side that becomes the upstream side of the flow path of the fluid in the infusion line (left direction in FIG. 1, downward direction in FIGS. 2 to 5) is referred to as the "proximal side".

[0021] As shown in FIGS. 1 to 5, the male connector 1 includes a housing 10, a flow path pipe member 40, and a valve body 50. As shown in FIGS. 4 and 5, the housing 10 defines a hollow portion 11. The flow path pipe member 40 extends into the hollow portion 11 of the housing 10. An opening 42 is formed on the distal side in the extending direction A of the flow path pipe member 40. As shown in FIGS. 4 and 5, the valve body 50 is located within the hollow portion 11 of the housing 10. Also, as shown in FIG. 4, the valve body 50 closes the opening 42 of the flow path pipe member 40. Although details will be described later, in the male connector 1, there are a first form (see FIG. 4 etc.) in which the valve body 50 closes the opening 42 of the flow path pipe member 40, and a second form (see FIGS. 13 and 14) in which the valve body 50 opens the opening 42 of the flow path pipe member 40, and the form can be changed between them.

[0022] Hereinafter, the extending direction A of the flow path pipe member 40 will be simply referred to as the "extending direction A". Also, the radial direction B of the virtual circle around the central axis O of the flow path pipe member 40 will be simply referred to as the "radial direction B". Further, the circumferential direction C around the central axis O of the flow path pipe member 40 will be simply referred to as the "circumferential direction C".

[0023] As shown in FIGS. 1 to 5, the female connector 2 includes a housing 60 and an elastic valve body 70. As shown in FIGS. 4 and 5, the housing 60 defines a male connector insertion portion 61 and a flow path 66 as hollow portions. The elastic valve body 70 is located at the proximal end of the male connector insertion portion 61 of the housing 60 and closes the male connector insertion portion 61. The top surface 72 of the elastic valve body 70 is exposed to the outside of the female connector 2. The flow path pipe body 46 (see FIG. 4 etc.) of the flow path pipe member 40 of the male connector 1, which will be described later, is inserted into the male connector insertion portion 61 from the side of the top surface 72 of the elastic valve body 70.

[0024] Hereinafter, the configurations of the male connector 1 and the female connector 2 will be described in detail. Hereinafter, for convenience of explanation, the housing 10 of the male connector 1 will be referred to as the "first housing 10", and the housing 60 of the female connector 2 will be referred to as the "second housing 60". Also, for convenience of explanation, the flow path 41 of the male connector 1 will be referred to as the "first flow path 41", and the flow path 66 of the female connector 2 will be referred to as the "second flow path 66".

[0025] <Male Connector 1> [First Housing 10] The first housing 10 includes a housing main body 20 and a moving body 30 that is movable relative to the housing main body 20. The hollow portion 11 of the first housing 10 is constituted by a hollow portion 29 partitioned by the housing main body 20 and a hollow portion 39 partitioned by the moving body 30.

[0026] [[Housing Main Body 20]] FIG. 6 is a perspective view showing the housing main body 20 alone. The housing main body 20 includes a cylindrical portion 21 extending in the extending direction A and a locking claw portion 22 protruding from the cylindrical portion 21. The cylindrical portion 21 defines an opening 21a penetrating in the radial direction B at positions facing each other in the radial direction B. Further, a plurality of recesses 21c that are recessed toward the proximal side are formed on the distal end surface of the cylindrical portion 21 in the extending direction A. In the present embodiment, four recesses 21c are formed on the above end surface of the cylindrical portion 21 and are arranged at intervals in the circumferential direction C.

[0027] Further, as shown in FIG. 6, a long groove portion 21b extending along the extending direction A is formed on the inner surface of the cylindrical portion 21. The proximal end of the long groove portion 21b extends to the proximal end of the cylindrical portion 21 and is open at the proximal end of the cylindrical portion 21. On the other hand, the distal end of the long groove portion 21b terminates at the position of a wall portion 21b1 formed on the inner surface of the cylindrical portion 21.

[0028] The locking claw portion 22 includes a support portion 22a, a claw main body portion 22b, and an operation portion 22c.

[0029] The support portion 22a of the locking claw portion 22 protrudes radially outward in the radial direction B from the cylindrical portion 21. The support portion 22a of the present embodiment supports the claw main body portion 22b and the operation portion 22c. The support portion 22a of the present embodiment is provided at a position facing each other in the radial direction B of the cylindrical portion 21. Specifically, the two support portions 22a of the present embodiment are arranged at the same position in the circumferential direction C as the two openings 21a of the cylindrical portion 21.

[0030] The claw main body portion 22b protrudes from the support portion 22a toward the distal side in the extending direction A. The claw main body portion 22b is provided, at its distal end which is the tip portion, with a locking claw 22b1 that protrudes inward in the radial direction B. The claw main body portion 22b is swingable in the radial direction B with the support portion 22a as a fulcrum. When the claw main body portion 22b swings in the radial direction B, the locking claw 22b1 also moves in the radial direction B. The locking claw 22b1 of the claw main body portion 22b in the present embodiment enters into the opening 21a of the cylindrical portion 21 in the state before connection shown in FIG. 1 and the like.

[0031] The distal end surface of the locking claw 22b1 is provided with an inclined surface 25a that inclines toward the proximal side in the extending direction A as it extends from the outside to the inside in the radial direction B. The inclined surface 25a in the present embodiment extends to the inner end in the radial direction B of the locking claw 22b1.

[0032] The proximal end surface of the locking claw 22b is provided with a catching surface 25b that is substantially parallel to the radial direction B. The catching surface 25b in the present embodiment extends to the inner end in the radial direction B of the locking claw 22b1.

[0033] The operation portion 22c protrudes from the support portion 22a toward the proximal side in the extending direction A. The operation portion 22c is swingable in the radial direction B with the support portion 22a as a fulcrum. By moving the operation portion 22c inward in the radial direction B, the claw main body portion 22b moves outward in the radial direction B with the support portion 22a as a fulcrum. That is, by swinging the operation portion 22c in the radial direction B, the claw main body portion 22b can be moved in the radial direction B.

[0034] [[Moving body 30]] The moving body 30 is movable in the extending direction A with respect to the housing main body 20. By moving in the extending direction A with respect to the housing main body 20, the moving body 30 can deform or move (deform in this embodiment) the valve body so as to change its form between the first form and the second form. The "first form" is a form in which the opening 42 of the flow path pipe member 40 is closed by the valve body 50. As shown in FIGS. 4 and 5, in this embodiment, the valve body 50 covers one end portion on the distal side in the extending direction A of the flow path pipe member 40 and closes the opening 42, thereby realizing the first form. The "second form" is a form in which the opening 42 of the flow path pipe member 40 is opened from the valve body 50. Although details will be described later, in this embodiment, the flow path pipe member 40 penetrates through the valve body 50 and the opening 42 is exposed on the distal side of the valve body 50, thereby realizing the second form (see FIGS. 13 and 14).

[0035] The moving body 30 of this embodiment includes a first moving body 31 and a second moving body 32. The first moving body 31 and the second moving body 32 are relatively movable in the extending direction A.

[0036] FIG. 7 is a perspective view showing the first moving body 31 alone. The first moving body 31 includes a cylindrical main body portion 31a and a locking claw portion 31b. The cylindrical main body portion 31a has a substantially cylindrical outer shape. As shown in FIG. 7, the main body portion 31a defines a long hole 31a 1 that penetrates in the radial direction B at opposing positions in the radial direction B. The long hole 31a 1 is an opening that is long in the extending direction A.

[0037] Further, the main body portion 31a is provided with a protruding portion 31a2 that protrudes outward in the radial direction B at positions facing each other in the radial direction B. As shown in FIG. 5, the protruding portion 31a2 is fitted into the long groove portion 21b (see FIG. 6) of the housing main body 20 described above. By moving the protruding portion 31a2 along the long groove portion 21b, the first moving body 31 can move in the extending direction A with respect to the housing main body 20. The first moving body 31 can move distally in the extending direction A with respect to the housing main body 20 until the protruding portion 31a2 abuts against the wall portion 21b1 (see FIG. 6) of the long groove portion 21b. In other words, the long groove portion 21b of the housing main body 20 is a guide groove that guides the movement of the first moving body 31 in the extending direction A. Further, the wall portion 21b1 of the long groove portion 21b of the housing main body 20 is a movement restricting wall that abuts against the first moving body 31 and restricts the first moving body 31 from moving further distally in the extending direction A.

[0038] The locking claw portion 31b protrudes outward in the radial direction B from the main body portion 31a. More specifically, the locking claw portion 31b of the present embodiment includes an arm portion 31b1 that protrudes from the main body portion 31a outward in the radial direction B in a direction inclined with respect to the extending direction A, and a locking claw 31b2 that protrudes inward in the radial direction B from the distal end portion that is the distal end of the arm portion 31b1. The arm portion 31b1 is swingable in the radial direction B with the proximal end portion, which is the proximal end portion continuous with the main body portion 31a, as a fulcrum. An engaging surface 33 facing the proximal side in the extending direction A is provided on the outer surface of the arm portion 31b1 in the radial direction B. This engaging surface 33 engages with the end surface on the distal side in the extending direction A of the housing main body 20 described above. More specifically, the engaging surface 33 of the present embodiment abuts against and engages with a concave portion 21c formed on the end surface on the distal side in the extending direction A of the housing main body 20. By the engaging surface 33 engaging with the above end surface of the housing main body 20, the movement of the first moving body 31 proximally in the extending direction A with respect to the housing main body 20 is restricted.

[0039] FIG. 8 is an exploded perspective view of the flow path pipe member 40, the valve body 50, and the second moving body 32 of the male connector 1. As shown in FIGS. 4, 5, and 8, the second moving body 32 includes a substantially cylindrical outer cylinder portion 32a, an annular flange portion 32b, and an inner cylinder portion 32c.

[0040] On the outer surface of the outer cylindrical portion 32a, a protruding portion 32a1 protruding outward in the radial direction B is provided. The protruding portions 32a1 are provided at positions facing each other in the radial direction B. The protruding portion 32a1 fits into the long hole 31a1 of the first moving body 31 described above. The protruding portion 32a1 is movable in the extending direction A within the long hole 31a1. Thereby, the second moving body 32 is movable in the extending direction A with respect to the first moving body 31 within the range where the protruding portion 32a1 is movable in the extending direction A within the long hole 31a1.

[0041] The flange portion 32b protrudes inward in the radial direction B from the inner surface of the outer cylindrical portion 32a. As shown in FIGS. 4 and 5, the flange portion 32b is in contact with the distal surface of the flange portion 58 of the valve body 50. Therefore, when the second moving body 32 is moved proximally in the extending direction A, the flange portion 32b presses the flange portion 58 of the valve body 50 proximally. Thereby, by moving the second moving body 32 proximally in the extending direction A, the valve body 50 can be compressed and deformed proximally in the extending direction A. Conversely, when the valve body 50 in a state of being compressed and deformed proximally in the extending direction A extends distally in the extending direction A by the restoring force, the flange portion 58 of the valve body 50 presses the flange portion 32b of the second moving body 32 distally. Thereby, the second moving body 32 can be returned to its original position. The details will be described later.

[0042] The inner cylindrical portion 32c protrudes distally in the extending direction A from the inner edge of the flange portion 32b. The inner cylindrical portion 32c is arranged concentrically inside the outer cylindrical portion 32a in the radial direction B.

[0043] On the inner surface of the inner cylindrical portion 32c, an annular protrusion 32c1 protruding inward in the radial direction B is provided. The annular protrusion 32c1 fits into the annular groove 57a (see FIG. 8) on the outer surface of the tip portion 57 of the valve body 50. Thereby, the tip portion 57 accommodated in the inner cylindrical portion 32c is less likely to fall off proximally in the extending direction A from the inner cylindrical portion 32c.

[0044] As materials for the housing body 20, the first moving body 31, and the second moving body 32 that constitute the first housing 10, for example, polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymer; ethylene-vinyl acetate copolymer (EVA); polyvinyl chloride; polyvinylidene chloride; polystyrene; polyamide; polyimide; polyamideimide; polycarbonate; poly-(4-methylpentene-1); ionomer; acrylic resin; polymethyl methacrylate; acrylonitrile-butadiene-styrene copolymer (ABS resin); acrylonitrile-styrene copolymer (AS resin); butadiene-styrene copolymer; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polycyclohexane terephthalate (PCT); polyether; polyether ketone (PEK); polyether ether ketone (PEEK); polyether imide; polyacetal (POM); polyphenylene oxide; modified polyphenylene oxide; polysulfone; polyether sulfone; polyphenylene sulfide; polyarylate; aromatic polyester (liquid crystal polymer); polytetrafluoroethylene, polyvinylidene fluoride, and other fluorine-based resins; and various resin materials such as these can be mentioned. Also, blends or polymer alloys containing one or more of these may be used. In addition, various glass materials, ceramic materials, and metal materials may also be used.

[0045] [Flow path pipe member 40] The flow path tube member 40 defines a first flow path 41 inside. The first flow path 41 communicates with the outside through an opening 42. The flow path tube member 40 is connected to the proximal end of a housing body 20 that constitutes the proximal end of the first housing 10. Thereby, the proximal side of the hollow portion 29 of the housing body 20 is sealed by the flow path tube member 40. The flow path tube member 40 is provided with a medical instrument connection portion 43 at its proximal end that can be connected to a medical instrument such as a medical tube. Further, the flow path tube member 40 includes a flow path tube main body 46 that extends into the hollow portion 11 of the first housing 10 and has an opening 42 formed at its distal end. The first flow path 41 communicates from the proximal end of the medical instrument connection portion 43 to the opening 42 at the distal end of the flow path tube main body 46. Also, the flow path tube member 40 is provided with a distal end portion 44 that tapers in diameter toward the distal side in the extending direction A at its distal end. In the present embodiment, the distal end portion 44 has a shape composed of two tapered portions with different diameter reduction rates, but it may have another tapered shape such as a conical shape. The distal end of the distal end portion 44 may not be sharp and may be formed flat along the radial direction B.

[0046] Further, the flow path tube member 40 includes an annular flange portion 45 that protrudes radially outward in the B direction from the medical instrument connection portion 43. The proximal end of the bellows tube portion 56 of the valve body 50 described later is supported by the distal surface of the flange portion 45.

[0047] The flow path tube member 40 can be formed of the same material as the first housing 10 described above.

[0048] [Valve body 50] The valve body 50 covers the flow path tube main body 46 inside the first housing 10. Specifically, the valve body 50 of the present embodiment includes a bellows tube portion 56 that can be elastically deformed in the extending direction A, a distal end portion 57 that is continuous with the bellows tube portion 56 so as to close the distal side of the hollow portion of the bellows tube portion 56 and is housed in the inner tube portion 32c of the second moving body 32, and a flange portion 58 that protrudes radially outward in the B direction from the bellows tube portion 56.

[0049] The proximal end of the bellows tube portion 56 is supported by the flow path tube member 40. More specifically, the proximal end of the bellows tube portion 56 abuts against and is supported by the distal-side surface of the flange portion 45 of the flow path tube member 40 in a state where the bellows tube portion 56 and the tip portion 57 cover the flow path tube main body 46 of the flow path tube member 40.

[0050] The tip portion 57 is held inside the inner tube portion 32c of the second moving body 32 of the moving body 30. As shown in FIG. 8, an annular groove 57a is formed on the outer surface of the tip portion 57 of the present embodiment. As described above, the annular projection 32c1 (see FIG. 4) provided on the inner surface of the inner tube portion 32c fits into the annular groove 57a on the outer surface of the tip portion 57. Thereby, the tip portion 57 is less likely to fall off proximally in the extending direction A from inside the inner tube portion 32c. Further, the tip portion 57 is configured such that the flange portion 58 abuts against the flange portion 32b of the second moving body 32 described above, so that the tip portion 57 does not fall off distally in the extending direction A from inside the inner tube portion 32c. In this way, the tip portion 57 is maintained in a state of being accommodated inside the inner tube portion 32c of the second moving body 32.

[0051] Further, a slit 51 penetrating from the proximal side to the distal side is formed in the tip portion 57. Further, a conical convex portion 52a protruding distally is formed at the center of the top surface 52 which is the distal-side end surface of the tip portion 57. By providing the convex portion 52a at the center of the top surface 52, it becomes easier to closely contact the top surface 72 of the elastic valve body 70 of the female connector 2 described later. Therefore, when disconnecting the male connector 1 and the female connector 2, it becomes difficult for a liquid such as a chemical solution to adhere to the top surface 52 of the valve body 50 and the top surface 72 of the elastic valve body 70. Details of this will be described later.

[0052] In the male connector 1 before connection shown in FIGS. 1 to 5, it is in the first form in which the opening 42 of the flow path tube member 40 is closed by the valve body 50. As shown in FIG. 4, in the present embodiment, the distal end portion of the flow path tube member 40a including the opening 42 is covered by the valve body 50, so that the opening 42 is closed.

[0053] The valve body 50 preferably has a Shore A hardness of 10 or more and 70 or less, more preferably 20 or more and 50 or less. If the hardness is less than 10 Shore A hardness, when the pressure in the first flow path 41 increases, there is a risk that a fluid such as a chemical solution may leak to the outside. If the hardness is greater than 70 Shore A hardness, the contact between the valve body 50 and the elastic valve body 70 of the female connector 2 becomes insufficient, and when the connection with the female connector 2 is released, there is a risk that a fluid such as a chemical solution may leak to the outside. Further, if the valve body 50 has a Shore A hardness of 20 or more and 50 or less, suitable adhesion with the female connector 2 can be ensured, and when the connection with the female connector 2 is released, leakage of a fluid such as a chemical solution to the outside can be more reliably suppressed.

[0054] The valve body 50 is formed by die molding and is formed to be elastically deformable. Examples of the material of the valve body 50 include various rubber materials such as natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, urethane rubber, silicone rubber, and fluororubber, and various thermoplastic elastomers such as styrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, trans-polyisoprene-based, fluororubber-based, and chlorinated polyethylene-based. A configuration in which one or more of these are mixed may also be used. It is possible to form the valve body 50 from separate materials or from the same material.

[0055] <Female connector 2> [Second housing 60] As shown in FIGS. 4 and 5, the second housing 60 includes a cap 62 that defines a male connector insertion portion 61 into which the male connector 1 is inserted from the outside, and a holder 63 that supports the cap 62 and defines a second flow path 66. The male connector insertion portion 61 is a hollow portion defined by the cap 62 and the holder 63. The second flow path 66 is a hollow portion defined by the holder 63. The male connector insertion portion 61 is defined proximal to the second flow path 66. The hollow portion defined by the second housing 60 is composed of the male connector insertion portion 61 and the second flow path 66.

[0056] An annular groove 65 as a locked portion into which the locking claw 31b2 of the locking claw portion 31b of the first moving body 31 can be fitted is formed on the outer peripheral wall of the cap 62. Further, the locking claw 22b1 of the locking claw portion 22 of the housing body 20 can also be fitted into the annular groove 65. Details of the fitting of the locking claw 31b2 and the locking claw 22b1 into the annular groove 65 will be described later (see FIGS. 9 to 14). Further, the cap 62 is formed by two members that sandwich and fix the elastic valve body 70 from both sides in the extending direction A.

[0057] The second housing 60 can be formed of the same material as the first housing 10 of the male connector 1 described above.

[0058] [Elastic valve body 70] The elastic valve body 70 is formed with a slit 71 penetrating from the proximal side to the distal side. As shown in FIGS. 4 and 5, the top surface 72 of the elastic valve body 70 is exposed to the outside. The elastic valve body 70 can be formed of the same material as the valve body 50 of the male connector 1 described above. The elastic valve body 70 preferably has a hardness of 20 to 60 on the Shore A hardness scale. Further, the elastic valve body 70 preferably has a hardness greater than that of the valve body 50 of the male connector 1. By making the hardness of the elastic valve body 70 greater than that of the valve body 50, when the pressure in the second flow path 66 increases, while suppressing the leakage of fluid such as a chemical solution to the outside, it becomes easier to suppress the amount of deformation of the elastic valve body 70 when the male connector 1 and the female connector 2 are connected. If the amount of deformation of the elastic valve body 70 is large, when the male connector 1 is removed from the female connector 2, a negative pressure may be generated in the second flow path 66, and there is a risk of sucking blood from the patient's blood vessel communicating with the second flow path 66.

[0059] <Connection operation of male connector 1 and female connector 2> Hereinafter, with reference to FIGS. 4, 5, 9 to 15, the connection operation of the male connector 1 and the female connector 2 will be described. As described above, FIGS. 4 and 5 are cross-sectional views showing the state before the connection of the male connector 1 and the female connector 2. FIGS. 9, 11, and 13 are cross-sections at the same position as FIG. 4, and FIG. 9 shows the state during connection, FIG. 11 shows the first connection state, and FIG. 13 shows the second connection state, respectively. Similarly, FIGS. 10, 12, and 14 are cross-sections at the same position as FIG. 5, and FIG. 10 shows the state during connection, FIG. 12 shows the first connection state, and FIG. 14 shows the second connection state, respectively. FIG. 15 is an explanatory diagram showing the operation of the second moving body 32 from the state during connection shown in FIGS. 9 and 10 to the first connection state shown in FIGS. 11 and 12. Details of the first connection state and the second connection state will be described later.

[0060] The male connector 1 and the female connector 2 can be connected by moving them closer to each other in the extending direction A from the pre-connection state shown in FIGS. 4 and 5. FIGS. 9 and 10 show a state in which the male connector 1 and the female connector 2 are brought closer to each other in the extending direction A from the pre-connection state shown in FIGS. 4 and 5, and the top surface 52 of the valve body 50 of the male connector 1 is in contact with the top surface 72 of the elastic valve body 70 of the female connector 2. Thus, when the male connector 1 and the female connector 2 of the present embodiment are connected, the top surface 52 of the valve body 50 of the male connector 1 and the top surface 72 of the elastic valve body 70 of the female connector 2 first come into contact. When the male connector 1 and the female connector 2 are further brought closer to each other in the extending direction A, the top surface 62a of the cap 62 of the female connector 2 abuts against the distal end 32c2 of the inner cylindrical portion 32c of the second moving body 32 of the male connector 1. FIGS. 9 and 10 show a state in which the top surface 52 of the valve body 50 of the male connector 1 abuts against the top surface 72 of the elastic valve body 70 of the female connector 2, and the distal end 32c2 of the second moving body 32 of the male connector 1 abuts against the top surface 62a of the cap 62 of the female connector 2.

[0061] When the male connector 1 and the female connector 2 are further brought closer to each other in the extending direction A from the state shown in FIGS. 9 and 10, the top surface 62a of the cap 62 of the female connector 2 presses the distal end 32c2 of the inner cylindrical portion 32c of the second moving body 32 of the male connector 1 toward the proximal side in the extending direction A. As a result, the second moving body 32 moves toward the proximal side in the extending direction A from the state shown in FIG. 15(a) to the state shown in FIG. 15(b). As shown in FIGS. 15(a) and 15(b), at this time, the second moving body 32 moves relative to the first moving body 31 and the housing body 20. At this time, the first moving body 31 is maintained in a state of being locked so as not to move in the extending direction A with respect to the housing body 20. More specifically, as shown in FIGS. 15(a) and 15(b), the engagement surface 33 of the locking claw portion 31b of the first moving body 31 is maintained in a state of abutting against the recess 21c on the end surface of the cylindrical portion 21 of the housing body 20. Therefore, the first moving body 31 is maintained in a locked state in which it cannot move relative to the proximal side in the extending direction A with respect to the housing body 20.

[0062] As shown in FIGS. 15(a) and 15(b), the second moving body 32 of the present embodiment is movable in the extending direction A with respect to the first moving body 31 from the position where the protrusion 32a1 abuts against the distal wall of the long hole 31a1 to the position where the protrusion 32a1 abuts against the proximal wall of the long hole 31a1. When the second moving body 32 moves from the state shown in FIG. 15(a) to the state shown in FIG. 15(b), the valve body 50 is also compressed and deformed in the extending direction A. Specifically, the flange portion 32b (see FIG. 4 etc.) of the second moving body 32 presses the flange portion 58 (see FIG. 4 etc.) of the valve body 50 toward the proximal side in the extending direction A. Thereby, the bellows tube portion 56 of the valve body 50 is elastically deformed and compressed in the extending direction A.

[0063] When the second moving body 32 is further pressed toward the proximal side in the extending direction A from the state shown in FIG. 15(b), the protrusion 32a1 of the second moving body 32 presses the proximal wall of the long hole 31a1 toward the proximal side. As a result, the engaging surface 33 of the locking claw portion 31b of the first moving body 31 moves inward in the radial direction B so as to slide with a part of the end surface of the cylindrical portion 21 of the housing main body 20, which is the recess 21c (see FIG. 11). Thereby, the entire locking claw portion 31b of the first moving body 31 enters into the cylindrical portion 21 of the housing main body 20. That is, the state in which the first moving body 31 is locked so as not to move toward the proximal side in the extending direction A with respect to the housing main body 20 is released. As a result, the first moving body 31 becomes movable toward the proximal side in the extending direction A with respect to the housing main body 20.

[0064] Figure 11 shows the state where the entire locking claw portion 31b of the first moving body 31 has entered into the cylindrical portion 21 of the housing body 20 from the state shown in Fig. 15(b). As shown in Fig. 11, when the locking claw portion 31b of the first moving body 31 moves inward in the radial direction B, the locking claw 31b2 enters into the annular groove 65 of the cap 62 of the female connector 2. Thereby, the first moving body 31 can be locked so as not to move the female connector 2 toward the distal side in the extending direction A. Therefore, the state where the valve body 50 of the male connector 1 and the elastic valve body 70 of the female connector 2 form a contact region can be stably maintained. In the present embodiment, the state where the locking claw 31b2 enters into the annular groove 65 of the cap 62 of the female connector 2 is referred to as the "first connection state".

[0065] From the states shown in Figs. 11 and 12, when the male connector 1 and the female connector 2 are further brought closer to each other in the extending direction A, while the first moving body 31 locks the female connector 2, the first moving body 31 and the second moving body 32 further move proximally in the extending direction A with respect to the housing body 20. As a result, the bellows tube portion 56 of the valve body 50 is further compressed and deformed in the extending direction A. As a result, as shown in Figs. 13 and 14, the tip of the flow path tube body 46 of the flow path tube member 40 passes through the valve body 50 and the elastic valve body 70 through the contact region between the valve body 50 and the elastic valve body 70. Thereby, the male connector 1 changes its form from the first form (see Figs. 4, 9, and 11) where the valve body 50 closes the opening 42 of the flow path tube member 40 to the second form (see Fig. 13) where the valve body 50 opens the opening 42 of the flow path tube member 40. Then, the first flow path 41 of the male connector 1 and the second flow path 66 of the female connector 2 are in a state of being in liquid-tight communication.

[0066] When the first moving body 31 and the second moving body 32 further move closer to the proximal side in the extending direction A with respect to the housing main body 20, as shown in FIG. 14, the locking claw 22b1 of the locking claw portion 22 of the housing main body 20 overrides a part of the outer peripheral surface of the cap 62 of the female connector 2. As a result, the locking claw 22b1 enters the annular groove 65 of the female connector 2. More specifically, the inclined surface 25a of the locking claw 22b1 slides on the outer edge portion of the top surface 62a of the cap 62 of the female connector 2, and is thereby pressed radially outward in the direction B. Accordingly, the claw main body portion 22b moves so as to swing radially outward in the direction B. As a result, the locking claw 22b1 moves radially outward in the direction B and can override a part of the outer peripheral surface of the cap 62. That is, during the connection operation of the male connector 1 and the female connector 2, the operation portion 22c of the locking claw portion 22 is unnecessary. In the male connector 1 and the female connector 2 of the present embodiment, by simply moving both of them in the direction approaching each other in the extending direction A, the locking claw 22b1 can be inserted into the annular groove 65 of the female connector 2. Thus, with the locking claw 31b2 remaining inserted into the annular groove 65 (see FIG. 13), as shown in FIG. 14, the locking claw 22b1 can also be inserted into the annular groove 65. In the present embodiment, a state where the locking claw 31b2 is inserted into the annular groove 65 of the cap 62 of the female connector 2 and a state where the locking claw 22b1 is inserted into the annular groove 65 of the cap 62 of the female connector 2 are referred to as the "second connection state".

[0067] The male connector 1 and the female connector 2 are completely connected by achieving the above-described second connection state.

[0068] <Removing operation of the male connector 1 and the female connector 2><The male connector 1 and the female connector 2 are completely connected by achieving the above-described second connection state. Next, the removal operation for disconnecting the male connector 1 and the female connector 2 in the second connection state shown in FIGS. 13 and 14 will be described. When removing, the operation portion 22c of the locking claw portion 22 of the male connector 1 is pressed and moved inward in the radial direction B. By doing so, the claw main body portion 22b located on the side opposite to the operation portion 22c with the support portion 22a interposed therebetween can be moved outward in the radial direction B with the support portion 22a as a fulcrum. As a result, the locking claw 22b1 that has entered the annular groove 65 of the cap 62 of the female connector 2 also moves outward in the radial direction B and comes out of the annular groove 65. That is, the second connection state is released.

[0069] When the locking claw 22b1 comes out of the annular groove 65, the second moving body 32 is pressed distally in the extending direction A by the elastic force as the restoring force of the bellows tube portion 56 of the valve body 50 that has been compressed and deformed. More specifically, the flange portion 58 of the valve body 50 presses the flange portion 32b of the second moving body 32 distally. Thereby, the second moving body 32 moves distally in the extending direction A.

[0070] The state in which the locking claw 31b2 of the first moving body 31 has entered the annular groove 65 of the cap 62 of the female connector 2 is maintained even at this time. Therefore, when the second moving body 32 moves distally in the extending direction A, the first moving body 31 and the female connector 2 also move distally in the extending direction A following it.

[0071] In this way, the first moving body 31, the second moving body 32, and the female connector 2 are integrated and move toward the distal side in the extending direction A, so that the flow path pipe body 46 of the flow path pipe member 40 is removed from the valve body 50 and the elastic valve body 70. That is, the flow path pipe body 46 of the flow path pipe member 40 can be removed from the valve body 50 and the elastic valve body 70 while maintaining the first connection state in which the locking claw 31b2 of the first moving body 31 is engaged with the annular groove 65 of the cap 62 of the female connector 2. As a result, in a state where the contact region of the valve body 50 and the elastic valve body 70 is stably formed, the flow path pipe body 46 of the flow path pipe member 40 can be removed from the valve body 50 and the elastic valve body 70 through this contact region. As a result, it is possible to suppress the adhesion of a liquid such as a chemical solution to the top surface 52 of the valve body 50 and the top surface 72 of the elastic valve body 70 after removal, in other words, to suppress the occurrence of "remaining droplets" on the top surface 52 of the valve body 50 and the top surface 72 of the elastic valve body 70.

[0072] After the flow path pipe body 46 of the flow path pipe member 40 is removed from the valve body 50 and the elastic valve body 70, the engaging surface 33 of the locking claw portion 31b of the first moving body 31 reaches the position in the extending direction A of the concave portion 21c, which is a part of the end surface of the cylindrical portion 21 of the housing body 20. At this time, due to the elastic force as the restoring force of the arm portion 31b1, the locking claw portion 31b moves outward in the radial direction B, and the locking claw 31b2 comes out of the annular groove 65. That is, the first connection state is released. As a result, the male connector 1 and the female connector 2 can be separated from each other in the extending direction A.

[0073] The first moving body 31 and the second moving body 32 return to the state shown in FIGS. 4 and 5 by the restoring force of the valve body 50. That is, the first moving body 31 returns to the position where the protrusion 31a2 (see FIGS. 7, etc.) abuts against the wall portion 21b1 (see FIGS. 6, etc.) of the long groove portion 21b of the housing body 20. Further, the second moving body 32 returns to the position where the protrusion 32a1 (see FIGS. 8, 15, etc.) abuts against the distal wall of the long hole 31a1 (see FIGS. 7, 15, etc.) of the first moving body 31. In other words, the second moving body 32 returns to the state of protruding to the distal side in the extending direction A from the first moving body 31.

[0074] As described above, the male connector 1 can change its form between a first form (see FIGS. 4, 5, 9 to 12) in which the valve body 50 closes the opening 42 of the flow path pipe member 40 and a second form (see FIGS. 13 and 14) in which the valve body 50 opens the opening 42 of the flow path pipe member 40. In the present embodiment, the entire flow path pipe main body 46 of the flow path pipe member 40 is covered by the valve body 50, thereby realizing the first form. Further, in the present embodiment, the tip of the flow path pipe main body 46 of the flow path pipe member 40 penetrates the valve body 50, and the opening 42 located at the tip comes out of the valve body 50, thereby realizing the second form. However, the configurations for realizing the first form and the second form are not limited to the configuration of the present embodiment. Therefore, as long as the configurations for realizing the first form and the second form are possible, the configurations of the flow path pipe member 40 and the valve body 50 are not limited to the configuration of the present embodiment.

[0075] Further, the moving body 30 of the male connector 1 includes a locking claw 31b2 as a first locking portion that can lock the female connector 2 in a state where the valve body 50 and the elastic valve body 70 of the female connector 2 are in contact with each other in the first form. As shown in FIG. 11, the locking claw 31b2 as the first locking portion in the first moving body 31 of the moving body 30 can be fitted into the annular groove 65 of the female connector 2 in a state where the valve body 50 and the elastic valve body 70 are in contact with each other to form a contact region in the first form.

[0076] Furthermore, the housing main body 20 of the male connector 1 includes a locking claw 22b1 as a second locking portion that can lock the female connector 2 at a position different from the position where it is locked to the locking claw 31b2 as the first locking portion in a state where the locking claw 31b2 as the first locking portion locks the female connector 2 in the second form. As shown in FIG. 14, the locking claw 22b1 as the second locking portion of the housing main body 20 can be fitted into another position of the annular groove 65 in a state where the locking claw 31b2 as the first locking portion is fitted into the annular groove 65 of the female connector 2 in the second form.

[0077] The first locking portion of the present embodiment is constituted by the locking claw 31b2. However, as long as it is configured to restrict the movement of the female connector 2 toward the distal side in the extending direction A so that the female connector 2 does not separate toward the distal side in the extending direction A, the configuration is not particularly limited. Further, the second locking portion of the present embodiment is constituted by the locking claw 22b1. However, as long as it is configured to restrict the movement of the female connector 2 toward the distal side in the extending direction A so that the female connector 2 does not separate toward the distal side in the extending direction A, the configuration is not particularly limited.

[0078] Since the male connector 1 can change its form between the first form and the second form, it is possible to suppress the leakage of fluid such as a chemical solution to the outside when the connection with the female connector 2 is released. Further, since the male connector 1 includes the above-described first locking portion and second locking portion, the connection stability with the female connector 2 can be improved.

[0079] Further, in the present embodiment, the locking claws 31b2 of the first moving body 31 as the first locking portion of the moving body 30 are provided in two at intervals in the circumferential direction C. More specifically, the two locking claws 31b2 of the present embodiment are arranged at positions facing each other in the radial direction B. In this way, it is preferable that the locking claw 31b2 as the first locking portion is not configured in an endless shape such as a cylindrical shape. By doing so, a locking claw 31b2 that is easily movable in the radial direction B can be realized. However, the first locking portion is not limited to the number and position of the present embodiment. Only one first locking portion may be provided in a part of the circumferential direction C, or three or more first locking portions may be provided at intervals in the circumferential direction C.

[0080] In addition, in the present embodiment, the locking claw 31b2 as the first locking portion of the moving body 30 is movable in the radial direction B when the moving body 30 moves in the extending direction A with respect to the housing main body 20. More specifically, the locking claw 31b2 of the first moving body 31 as the first locking portion of the moving body 30 in the present embodiment is movable in the radial direction B when the first moving body 31 moves in the extending direction A with respect to the housing main body 20. As shown in FIG. 4 and the like, the first moving body 31 of the present embodiment is locked to the housing main body 20 by the engaging surface 33 abutting against and being caught by a concave portion 21c which is a part of the end surface of the cylindrical portion 21 of the housing main body 20, and the movement of the first moving body 31 toward the proximal side in the extending direction A is restricted. From this state, when the first moving body 31 is pressed toward the proximal side in the extending direction A, the arm portion 31b1 of the locking claw portion 31b of the first moving body 31 is elastically deformed inward in the radial direction B, and the above-described engaging surface 33 moves inward in the radial direction B from the concave portion 21c. As a result, as shown in FIG. 11 and the like, the locking of the first moving body 31 to the housing main body 20 is released. In addition, the locking claw 31b2 as the first locking portion moves inward in the radial direction B. In other words, the locking claw 31b2 as the first locking portion can move inward in the radial direction B in conjunction with the movement of the first moving body 31 toward the proximal side in the extending direction A (see FIG. 11). Conversely, when disconnecting from the female connector 2 or the like, the locking claw 31b2 as the first locking portion moves outward in the radial direction B by the restoring force of the arm portion 31b1 in conjunction with the movement of the first moving body 31 toward the distal side in the extending direction A. As a result, the locking claw 31b2 as the first locking portion returns to the position shown in FIG. 4 and the like.

[0081] However, the first locking portion is not limited to the configuration of the locking claw 31b2 of the present embodiment as long as it is configured to move in the radial direction B in conjunction with the movement of the moving body 30 in the extending direction A.

[0082] By providing the male connector 1 with the moving body 30 having the first locking portion that moves in the radial direction B in conjunction with the movement of the moving body 30 in the extending direction A, in the connection operation of the male connector 1 and the female connector 2 only by the proximity movement in the extending direction A, the locking of the female connector 2 by the first locking portion can be realized.

[0083] Also, in the present embodiment, two locking claws 22b1 as the second locking portion of the housing body 20 are provided at intervals in the circumferential direction C. More specifically, the two locking claws 22b1 of the present embodiment are arranged at positions facing each other in the radial direction B. Thus, it is preferable that two locking claws 22b1 as the second locking portion are arranged at facing positions. By doing so, the female connector 2 can be stably locked. In particular, the locking claw 22b1 of the present embodiment is released from the locked state with the female connector 2 by pushing the operation portion 22c inward in the radial direction B. Therefore, when disconnecting from the female connector 2, a medical worker can easily release the locked state of the locking claw 22b1 with the female connector 2 by operating so as to sandwich the two operation portions 22c arranged at facing positions.

[0084] However, the second locking portion is not limited to the number and position of the present embodiment. Only one second locking portion may be provided in a part of the circumferential direction C, or three or more second locking portions may be provided at intervals in the circumferential direction C.

[0085] Furthermore, in the present embodiment, when the state in which the locking claw 22b1 as the second locking portion of the housing body 20 locks the female connector 2 is released, due to the restoring force of the deformed valve body 50, the moving body 30 moves distally in the extending direction A with respect to the housing body 20. As a result, the male connector 1 changes its form from the second form in which the opening 42 is open to the first form in which the opening 42 is closed. That is, according to the male connector 1 of the present embodiment, in conjunction with the operation of releasing the locked state of the female connector 2 by the locking claw 22b1 as the second locking portion, the form can be changed from the second form to the first form. Thereby, when disconnecting from the female connector 2, the opening 42 of the flow path pipe member 40 can be more reliably closed by the valve body 50.

[0086] In this embodiment, as described above, the restoring force of the bellows tube portion 56 of the valve body 50 compressed and deformed in the extending direction A can return the moving body 30 to its original position, but the present invention is not limited to this configuration. The male connector 1 may be configured to include a biasing member that biases the valve body 50 or the moving body 30 toward the distal side in the extending direction A. That is, the male connector 1 may return the moving body 30 to its original position by the biasing force of the biasing member.

[0087] Also, in this embodiment, after the form changes from the second form in which the opening 42 is opened to the first form in which the opening 42 is closed, the moving body 30 continues to move toward the distal side in the extending direction A with respect to the housing main body 20 due to the restoring force of the valve body 50. As a result, the state in which the locking claw 31b2 as the first locking portion locks the female connector 2 is released. More specifically, when disconnecting from the female connector 2, the locking claw 31b2 as the first locking portion of this embodiment moves radially outward in the direction B by the restoring force of the arm portion 31b1 in conjunction with the movement of the moving body 30 toward the distal side in the extending direction A (see FIGS. 9 and 11). As a result, the locking claw 31b2 as the first locking portion comes out of the annular groove 65 of the female connector 2, and the state in which the female connector 2 is locked by the locking claw 31b2 is released. That is, according to the male connector 1 of this embodiment, the locking state of the female connector 2 by the locking claw 31b2 as the first locking portion can be released by the restoring force of the valve body 50, and as a result, the female connector 2 can be completely separated from the male connector 1. In other words, in the male connector 1 of this embodiment, by only releasing the locking state of the female connector 2 by the locking claw 22b1 as the above-described second locking portion, the form change from the second form to the first form and the release of the locking state of the female connector 2 by the locking claw 31b2 as the first locking portion can be realized. That is, according to the male connector 1 of this embodiment, a medical worker can easily disconnect the connection with the female connector 2 by only the operation of sandwiching the operation portion 22c when disconnecting from the female connector 2. As described above, the male connector 1 of this embodiment can be easily connected to the female connector 2 by only the operation of approaching the female connector 2 in the extending direction A when connecting to the female connector 2.

[0088] In addition, as described above, the moving body 30 of the present embodiment includes a first moving body 31 and a second moving body 32 that are relatively movable in the extending direction A. Then, as shown in FIGS. 15(a) and 15(b), the second moving body 32 is movable in the extending direction A with respect to the first moving body 31 and the housing main body 20 in a state where the first moving body 31 is locked so as not to move in the extending direction A with respect to the housing main body 20. More specifically, the second moving body 32 is movable in the extending direction A with respect to the first moving body 31 between a protruding position (see FIG. 15(a)) and a retracted position (see FIG. 15(b)) in a state where the first moving body 31 is locked so as not to move in the extending direction A with respect to the housing main body 20. The "protruding position" means a position where the second moving body 32 protrudes together with the valve body 50 toward the distal side in the extending direction A from the first moving body 31 (see FIG. 15(a)). The "retracted position" means a position where the second moving body 32 retracts together with the valve body 50 to the proximal side in the extending direction A from the protruding position (see FIG. 15(b)).

[0089] In this way, by providing the moving body 30 with the first moving body 31 and the second moving body 32 that are relatively movable in the extending direction A, the movement between the protruding position and the retracted position of the second moving body 32 described above can be realized. By setting the second moving body 32 to the protruding position, the top surface 52 of the valve body 50 held by the second moving body 32 can be arranged at a position where it is easy to clean from the outside of the male connector 1. In the present embodiment, the top surface 52 of the valve body 50 constitutes the distal end of the entire male connector 1.

[0090] <Medical instrument including male connector 1> Finally, referring to FIG. 16, an infusion tube set 100 as a medical device including the male connector 1 described above will be described. FIG. 16 is a diagram showing a state in which the infusion tube set 100 including the male connector 1 is connected to another infusion tube set 110 including the female connector 2 described above. The infusion tube set 100 and another infusion tube set 110 are used for administering an infusion such as a chemical solution to a living body. As shown in FIG. 16, the infusion tube set 100 includes a connection device 102 connected to the chemical solution container 200, a male connector 1 located on the distal side which is downstream of the connection device 102, and a medical tube 103 connecting the connection device 102 and the male connector 1. Further, a clamp 104 for closing that portion may be attached in the middle of the medical tube 103. The clamp 104 is configured to press and sandwich the medical tube 103 from the outside to close the inside of the medical tube 103.

[0091] In the infusion tube set 100 having such a configuration, with the clamp 104 open, a liquid such as a chemical solution in the chemical solution container 200 flows from the connection device 102 through the medical tube 103 into the male connector 1. Then, when the male connector 1 is connected to another infusion tube set 110 including the female connector 2 described above as a mixing port, for example, through the female connector 2, the liquid that has flowed into the male connector 1 passes through the inside of the male connector 1 and the female connector 2, flows into another infusion tube set 110, and is supplied to the living body.

[0092] The connection device 102 includes a first connection portion 105 located at the proximal end and connected to the chemical solution container 200, a second connection portion 106 located at the distal end and connected to the medical tube 103, and a third connection portion 107 provided to protrude laterally from the outer wall to which a syringe is connected. Inside the connection device 102, a main flow path that communicates from the first connection portion 105 to the second connection portion 106 and can transport the liquid in the chemical solution container 200 to the medical tube 103, and a sub-flow path that communicates between the first connection portion 105 and the third connection portion 107 and enables liquid transportation between the chemical solution container 200 and the syringe connected to the third connection portion 107 are partitioned.

[0093] Thus, for example, by connecting a syringe containing a chemical solution including an anticancer agent to the third connection part 107 of the connection instrument 102, the chemical solution in the syringe can be transported to the chemical solution container 200 through the sub-channel of the connection instrument 102. Then, the chemical solution containing the anticancer agent stored in the chemical solution container 200 is supplied to the male connector 1 through the main channel of the connection instrument 102 and inside the medical tube 103.

[0094] As described above, by connecting the female connector 2 to the distal side of the male connector 1 and supplying the chemical solution containing the anticancer agent into another infusion tube set 110, the chemical solution containing the anticancer agent can be administered to the living body. And when the administration of the chemical solution is completed and the connection between the male connector 1 and the female connector 2 is released, since the valve body 50 of the male connector 1 closes, leakage of the chemical solution containing the anticancer agent from the distal end of the male connector 1 is suppressed.

[0095] Although the infusion tube set 100 has been exemplified as the medical instrument including the male connector 1, the male connector 1 is not limited to the infusion tube set and can also be used for other medical instruments. For example, it may be a syringe including the male connector 1 at the tip of the syringe body. In such a case, for example, the third connection part 107 of the above-described connection instrument 102 may have the same configuration as the female connector 2, and the syringe including the male connector 1 may be connected to the third connection part 107.

[0096] The male connector according to the present disclosure and the medical instrument including the male connector are not limited to the configurations of the above-described embodiments, and can be realized by various configurations without departing from the content described in the claims. The valve body 50 of the above-described embodiment has a configuration that can be compressed and deformed in the extending direction A by the bellows tube part 56, but is not limited to this configuration. The valve body 50 may have a configuration that can move in the extending direction A together with the moving body 30, for example. Further, the slit 51 of the valve body 50 and the slit 71 of the elastic valve body 70 may not be provided in advance, and may have a configuration that can be punctured by the flow path tube member 40 and communicate with each other.

[0097] In the above-described embodiment, the locking claw 31b2 as the first locking portion and the locking claw 22b1 as the second locking portion of the male connector 1 are fitted into the same annular groove 65 as the locked portion of the female connector 2 to lock the female connector 2. However, the present invention is not limited to this configuration. That is, the locked portion with which the first locking portion of the male connector 1 engages and the locked portion with which the second locking portion of the male connector 1 engages may be separate portions of the female connector 2. Further, the configuration of the locked portion is not limited to the annular groove 65 of the present embodiment, and can be appropriately changed according to the configurations of the first locking portion and the second locking portion.

[0098] In the above-described embodiment, a so-called "I-type connector" having a straight type second flow path 66 is exemplified as the female connector 2 connectable to the male connector 1. However, the present invention is not limited to this configuration. The female connector 2 connectable to the male connector 1 may be, for example, a T-type female connector including an upstream port, a downstream port, and a mixing port to which the male connector 1 can be connected. Further, the male connector 1 of the above-described embodiment is configured to be connectable not only to the straight type female connector 2 shown in FIG. 1 and the like but also to a T-type female connector 82 as shown in FIG. 17. The mixing port 83 of the T-type female connector 82 has the same configuration as the portion of the female connector 2 shown in the above-described embodiment that can be connected to the male connector 1. The upstream port 84 and the downstream port 85 in the T-type female connector 82 are configured to extend to the outside through the positions of the remaining two recesses 21c that do not engage with the locking claw portion 31b (see FIG. 1 and the like) in the pre-connection state (see FIG. 4) among the four recesses 21c formed on the end surface of the cylindrical portion 21 of the housing body 20 when the male connector 1 is connected to the mixing port 83. In the male connector 1 of the above-described embodiment, the two recesses 21c that engage with the locking claw portion 31b (see FIG. 1 and the like) in the pre-connection state (see FIG. 4) are arranged at positions facing each other in the radial direction B. Also, in the male connector 1 of the above-described embodiment, the two recesses 21c for receiving the upstream port 84 and the downstream port 85 of the female connector 82 are also arranged at positions facing each other in the radial direction B.

Industrial Applicability

[0099] The present disclosure relates to a male connector and a medical device.

Description of Symbols

[0100] 1: Male connector 2: Female connector 10: First housing 11: Hollow portion 20: Housing body 21: Cylindrical portion 21a: Opening 21b: Long groove portion 21b1: Wall portion 21c: Recessed portion 22: Locking claw portion 22a: Support portion 22b: Claw body portion 22b1: Locking claw (example of the second locking portion) 22c: Operating portion 25a: Inclined surface 25b: Engaging surface 29: Hollow portion 30: Movable body 31: First movable body 31a: Body portion 31a1: Long hole 31a2: Protrusion 31b: Locking claw portion 31b1: Arm portion 31b2: Locking claw (example of the first locking portion) 32: Second movable body 32a: Outer cylindrical portion 32a1: Protrusion 32b: Flange portion 32c: Inner cylindrical portion 32c1: Annular protrusion 32c2: Distal end 33: Engaging surface 39: Hollow portion 40: Flow path tube member 41: First flow path 42: Opening 43: Medical device connection portion 44: Tip portion 45: Flange part 46: Flow path tube body 50: Valve body 51: Slit 52: Top surface 52a: Protrusion 56: Bellows tube part 57: Tip part 57a: Annular groove 58: Flange part 60: Second housing 61: Male connector insertion part 62: Cap 62a: Top surface 63: Holder 65: Annular groove 66: Second flow path 70: Elastic valve body 71: Slit 72: Top surface 82: Female connector 83: Mixing injection port 84: Upstream port 85: Downstream port 100: Infusion tube set (example of medical device with male connector) 110: Infusion tube set 102: Connecting device 103: Medical tube 104: Clamp 105: First connection part 106: Second connection part 107: Third connection part A: Extension direction of flow path tube member B: Radial direction of flow path tube member C: Circumferential direction of flow path tube member O: Central axis of flow path tube member

Claims

1. A male connector connectable to a female connector having an elastic valve body, comprising: a housing defining a hollow portion; a flow path pipe member extending into the hollow portion and having an opening formed at one end side in the extending direction; a valve body located in the hollow portion and capable of closing the opening of the flow path pipe member, wherein the housing includes a housing body; a moving body that deforms or moves the valve body so that, by moving in the extending direction with respect to the housing body, the opening of the flow path pipe member is closed by the valve body in a first form and the opening of the flow path pipe member is opened from the valve body in a second form, and the form changes between the first form and the second form; the moving body includes a first locking portion capable of locking the female connector in a state where the valve body abuts against the elastic valve body of the female connector in the first form; the housing body includes a second locking portion capable of locking the female connector in a state where the first locking portion locks the female connector in the second form. The male connector.

2. The male connector according to claim 1, wherein only one or a plurality of the first locking portions of the moving body are provided at intervals in the circumferential direction of the flow path pipe member.

3. The male connector according to claim 1 or 2, wherein the first locking portion of the moving body is movable in the radial direction of the flow path pipe member when the moving body moves in the extending direction with respect to the housing body.

4. The male connector according to any one of claims 1 to 3, wherein only one or a plurality of the second locking portions of the housing body are provided at intervals in the circumferential direction of the flow path pipe member.

5. When the state in which the second locking portion of the housing body locks the female connector is released, the moving body moves in the extending direction with respect to the housing body by the restoring force of the deformed valve body or the biasing force of a biasing member that biases the valve body or the moving body toward the one end side in the extending direction, and the form changes from the second form to the first form. The male connector according to any one of claims 1 to 4.

6. After the form changes from the second form to the first form, due to the restoring force or the biasing force, the moving body continues to move in the extending direction with respect to the housing body, so that the state in which the first locking portion locks the female connector is released. The male connector according to claim 5.

7. The moving body includes a first moving body and a second moving body that are relatively movable in the extending direction. The second moving body is movable in the extending direction with respect to the first moving body and the housing body in a state where the first moving body is locked so as not to move in the extending direction with respect to the housing body. The male connector according to any one of claims 1 to 6.

8. A medical instrument comprising the male connector according to any one of claims 1 to 7.

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