JP2013022418A - Valving element for connector and connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valving element for a connector, which shows an excellent bending property and sealing property even when the injection of a fluid is performed a plurality of times, and also to provide a connector which shows excellent injection and sealing properties.SOLUTION: The valving element 5A for a connector includes: a head 21; a solid bottom 22 arranged on the downstream side extension line of the head 21; and a self bending and deformation part 23A disposed between the head 21 and the bottom 22 and to be bent in one radial direction by pressure to be actuated in an axial line C direction. The connector 1 includes: a connector tube 4 having at least two connection ports 12-14 for connecting a tubular body 81, a flow passage 15 for the communication of the connection ports 12-14, and a valving element storage part 16 arranged to be adjacent to the first connection port 12; and the valving body 5A for the connector, which is stored in the valving element storage part 16. The connector is shifted between a first posture where a plug 52 seals the connection port 12 and a second posture where the self bending and deformation part 23A is bent in one radial direction by pressure to be actuated in the axial line C direction thereby to allow the inner cavity of the tubular body 81 to communicate with a flow passage 15.

Description

  The present invention relates to a connector valve body and a connector. More specifically, the present invention relates to a connector valve body that exhibits excellent bendability and sealability even when fluid is injected a plurality of times, and exhibits excellent injectability and sealability. Concerning connectors.

  Various connectors for connecting at least two tube bodies are known, and examples thereof include a medical connector. The medical connector is, for example, a connector used for intravenous administration, blood transfusion, or the like for administering a medical solution, a body fluid, a nutrient, or the like (referred to as a fluid in this invention) necessary for a patient via a catheter or the like placed in the patient. A connector used when intravenously administering a second fluid of a type or concentration different from the first fluid connected to one tube body to the patient in a similar manner, specifically, a mixed injection tube or the like. .

  Conventionally, a syringe equipped with an injection needle has been used to inject the second fluid into a medical connector such as a mixed injection tube. However, in order to avoid infection due to needle stick of a medical worker, Instead of such a syringe, a tube body such as a syringe that does not include an injection needle, for example, a syringe with a luer lock, an infusion tube with a luer lock, and the like are used as a tube body connected to a medical connector.

  Such a medical connector that can connect or use a tube body that does not have an injection needle seals the connection port in a liquid-tight manner at all times, while opening the connection port only when necessary so that fluid can be administered. In addition, a connector valve body is provided therein.

  As such a medical connector, for example, Patent Document 1 describes “an assembly for connecting a fluid line including a first connecting member, a valve member, and a second connecting member” (for example, claims) Item 1). In this assembly for fluid line connection, the valve member has at least one axial bore and at least one radial bore in fluid communication with the axial bore and is formed from a rigid or semi-rigid material And an elastic body having a sealing surface and made of silicone (for example, claim 1, claim 6 and claim 7). The assembly for connecting the fluid line is “the stem moves toward the second coupling member, thereby compressing the elastic body and moving the sealing surface away from the female luer, It is configured so that fluid communication is established by opening between the cylindrical chamber and the like (for example, claim 2). Specifically, the assembly for connecting a fluid line in Patent Document 1 states that “the movement of the valve stem 14 causes the elastic valve body 16 that is an elastic body to be compressed against the radial vanes 62a to 62d along the axial direction. (3rd page, 3rd line to 15th line and FIG. 6).

  Patent Document 2 states that “a connector body having a connection port for connecting a pipe body and a fluid passage, a valve body, and the valve body can be moved in the axial direction of the connector body with respect to the connector body. And a biasing means for biasing the valve body toward the connection port, and the connection port is configured to open and close by the movement of the valve body. Connector "(claim 5, column 0144 to column 0167, FIGS. 12 to 14). In this connector, the valve body is configured to be movable in the axial direction of the connector main body by contraction of the urging means (claims 9, 0147, FIG. 4, etc.).

  Both “Assembly for fluid line connection” in Patent Document 1 and “Connector” in Permitted Document 2 may have a complicated structure, a large number of parts, and a relatively large size. On the other hand, Patent Document 3 proposes a connector that is easy in structure and easy to sterilize. Specifically, in Patent Document 3, “a housing extending along an axis, a first posture for sealing a valve seat built in the housing and disposed at a base end of the housing, and its own axis is the axis of the housing. A valve element having a valve element deformed to a second posture deviated from the above "(Claim 1 or the like), and a valve body having a plug 92h and a shaft 96h having a shaft hole 113h extending into the plug 92h; A connector including a housing 34h having a finger 127h hooked on 92h "has been proposed (column 9, line 19 to line 34, Fig. 12, etc.).

  Such a medical connector is usually made disposable after administration of the first fluid in order to prevent infection due to diversion or the like. However, the first connector is passed through one connector until administration of the first fluid is completed. It may be necessary to inject two fluids multiple times, or multiple fluids. Therefore, the connector valve body built in the connector has the same posture every time so that the fluid can be easily injected even when the fluid is injected multiple times, as well as the sealing performance for sealing the connection port in a liquid-tight manner. It is required to bend and deform.

JP 2000-503096 gazette JP 2001-170188 A US Pat. No. 5,782,816

  An object of the present invention is to provide a connector valve body that exhibits excellent bendability and sealability even when fluid is injected a plurality of times, and a connector that exhibits excellent injectability and sealability. .

  The inventors of the present invention have a characteristic that the connector valve body bends in the same manner every time even when it is bent and deformed a plurality of times (referred to as bendability in this invention) and a seal by the repulsive force or restoring force after being bent. As a result of diligent investigations focusing on the shape and structure of the connector valve body, if the connector valve body has a bending direction that curves in a predetermined direction, the sealing performance before bending is of course also curved. It was also found that the sealing performance after bending is excellent.

  The valve body for a connector according to the present invention, which is a first means for solving the above-described problem, includes at least two connection ports connectable to a pipe body, a flow path communicating these connection ports, and the first A connector valve body that is housed in a connector pipe having a valve body housing portion disposed so as to be adjacent to the connection port along the axis of the connection port, and controls the flow of fluid, wherein the first connection A head portion having a plug portion that seals the mouth, a solid bottom portion that is disposed on the downstream extension line of the head portion in the axial direction of the connector valve body, and is in contact with and supported by the valve body storage portion; A self-curvature deforming portion that is arranged along the axial direction between the head and the bottom and curves in one radial direction by a pressure acting in the axial direction is provided.

A preferred example of this connector valve body is:
(1) The self-curving deformable portion has a cross-sectional shape perpendicular to the axis of the connector valve body having n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis,
(2) The self-curving deformation part has a strong resistance part and a weak resistance part against the pressure acting in the axial direction,
(3) The self-curvature deforming portion has a lumen extending along the axis of the connector valve body,
(4) The self-curving deformable portion has at least one columnar body that extends in the axial direction and is curved by the pressure,
(5) The self-curving deformable portion has at least one columnar body arranged along the circumferential direction so as to surround the axis of the connector valve body,
(6) The self-curvature deforming portion has a plurality of the columnar bodies arranged so as to sandwich the axis of the connector valve body,
(7) The self-curvature deforming portion has one columnar body having an axis different from the axis of the connector valve body,
(8) The self-curving deformable portion has at least one through-hole or notch that opens in a direction intersecting the axis of the self-curving deformable portion,
(9) The connector valve body is made of an elastic material,
(10) The connector valve body is formed with an annular flow passage on the outer periphery of the connector valve body for allowing fluid to flow along with the inner surface of the valve body housing portion.
(11) The connector is a mixed injection tube.

  A connector according to the present invention, which is a second means for solving the above-described problems, includes at least two connection ports that can connect a tubular body, a flow path that communicates these connection ports, and the first connection port. A connector pipe having a valve body storage portion disposed so as to be adjacent to the connection port along the axis, and is stored in the valve body storage portion while being in contact with and supported by the support portion of the valve body storage portion. In addition, the connector valve body according to the present invention includes a first posture in which the plug portion seals the first connection port, and the self-curving with a pressure acting in an axial direction thereof. The deformable portion can be shifted to a second posture in which the deformable portion is curved in one radial direction and allows the lumen of the tubular body and the flow path to communicate with each other.

  In a preferred example of this connector, the self-curvature deforming portion bends without contacting the valve body storage portion and shifts from the first posture to the second posture.

  The connector valve body according to the present invention has a self-curved deformable portion disposed between the head portion and the bottom portion arranged along the axial direction that is curved in one radial direction by the pressure acting in the axial direction of the connector valve body. Therefore, even if multiple pressures are applied due to bending in the radius direction of the self-curved deformable part, it will bend in a specific direction and when this pressure is released, it will return to its original state with repulsive force or restoring force. Return. Therefore, the connector valve body according to the present invention exhibits excellent bendability and sealing performance even when the fluid is injected a plurality of times.

  Moreover, the connector which concerns on this invention incorporates the valve body for connectors based on this invention which was excellent in the curvature and the sealing performance in the valve body accommodating part of the connector pipe | tube. Therefore, the connector according to the present invention exhibits excellent injectability and sealability.

FIG. 1 is a schematic view showing an example of a connector valve body according to the present invention, and FIG. 1A is a schematic side view showing an example of a connector valve body according to the present invention. FIG. 2 is a schematic cross-sectional view showing an AA cross section in FIG. FIG. 2 is a schematic cross-sectional view showing a cross section of a self-curving deformable portion in a modification of the connector valve body according to the present invention. FIG. 3 is a schematic cross-sectional view showing a cross section of a self-curving deformable portion in a modified example of the connector valve body according to the present invention. FIG. 4 is a schematic side view showing another example of the connector valve body according to the present invention. FIG. 5 is a schematic view showing an example of a connector valve body according to the present invention, and FIG. 5 (a) is a schematic side view showing an example of a connector valve body according to the present invention. FIG. 5 is a schematic side view showing another example of the connector valve body according to the present invention, and FIG. 5C is a schematic side view showing another example of the connector valve body according to the present invention. (D) is a schematic sectional drawing which shows the AA cross section in FIG.5 (c). 6 is a schematic view showing an example of a connector valve body according to the present invention. FIG. 6A is a schematic side view showing another example of the connector valve body according to the present invention. FIG. 6B is a schematic sectional view showing an AA section in FIG. 6A, and FIG. 6C is a schematic side view showing still another example of the connector valve body according to the present invention. FIG. 7 is a schematic side view showing an example of a connector valve body according to the present invention. FIG. 8 is a schematic sectional view showing an example of a connector according to the present invention, FIG. 8A is a schematic sectional view showing a sealed state in an example of a connector according to the present invention, and FIG. It is a schematic sectional drawing which shows the open state in an example of the connector which concerns on invention.

  The valve body for a connector according to the present invention is a connector for connecting at least two pipe bodies, for example, a medical connector for connecting a tube connected to a catheter placed in a patient and an infusion pipe, etc. Suitable for a medical connector for connecting a tube and a tube body such as a syringe not provided with an injection needle, for example, a syringe with a luer lock, an infusion tube with a luer lock, etc. (referred to as a needleless tube body in the present invention). Used. The present invention will be described below by taking a medical connector as an example.

  Although details of the connector according to the present invention will be described later, in order to facilitate understanding of the connector valve body according to the present invention, a medical connector 1 which is a preferred example of the connector according to the present invention will be described below. As shown in FIG. 8A, a connector pipe 4 having a substantially Y shape in plan view and a connector valve body 5A built in the connector pipe 4 are provided. The connector tube 4 includes, for example, a first connection port 12 to which a needleless tube 81 can be connected, a second connection port 13 connected to a tube or the like that is indwelled in a patient, and to which a tube (not shown) is connected, And the 3rd connection port 14 connected with the bag etc. which stored the fluid administered to a patient, and the flow path 15 as an internal space which connects these connection ports 12-14 to which the pipe body which is not shown in figure is connected. And a valve body storage portion 16 disposed so as to be adjacent to the connection port 12 along the axis of the first connection port 12. In the connector pipe 4, the valve body storage portion 16 is a part of the flow path 15. The connector valve body 5 </ b> A is housed in the valve body housing portion 16 in a state of being in contact with and supported by the support portion 17 of the valve body housing portion 16.

  The connector valve body according to the present invention is connected to the valve body storage portion 16 in a state of being in contact with and supported by the support portion 17 of the valve body storage portion 16 provided in the connector pipe 4 of the connector according to the present invention, for example, the connector 1. Stored. The valve body for a connector according to the present invention housed in the valve body housing portion 16 forms an annular flow passage on the outer periphery of the valve body housing portion 16 along with the inner surface of the valve body housing portion 16. Therefore, the connector valve body according to the present invention has a shape and dimensions that can be stored in the valve body storage portion 16 and can form a flow passage.

  First, the outline of the valve body for a connector according to the present invention will be briefly described. The connector valve body according to the present invention is supported in contact with a head portion having a plug portion for sealing one connection port 12 of the connector pipe 4 and a support portion 17 provided in the valve body storage portion 16 of the connector pipe 4. And a self-curving deformable portion disposed along the axial direction of the connector valve body according to the present invention. As will be described in detail later and as shown in FIG. 8B, the self-curving deformable portion is centered on the axial direction by the pressure acting in the axial direction of the connector valve body according to the present invention. It is configured to bend in one radial direction. Accordingly, the self-curving deformable portion bends in a specific direction, that is, the one radial direction with respect to the axis, even if a plurality of pressures are applied in the axis direction when the fluid is injected a plurality of times. In this way, the self-curving deformable portion is curved with directionality, so that the connector valve body according to the present invention and the substantially vertical needleless tube body 81 press-fitted into the connection port for injecting fluid are provided. A fluid is injected into the connector pipe 4 through the space between the distal end surface 83. When the needleless tube 81 is removed from the connector tube 4, the pressure acting in the axial direction is released, and the connector valve according to the present invention returns to its original state by its own repulsive force or restoring force. Then, the connection port 12 is sealed. Such bending and restoration of the connector valve body according to the present invention are repeated with high reproducibility in the same manner even when the needle-free tubular body 81 is inserted and removed a plurality of times, and the connector valve body according to the present invention is highly curved. And exhibits sealing properties. As will be described later, the connector valve body according to the present invention is configured to be positively bent by the self-curvature deforming portion, and for example, without cooperating with other members or elements, for example, the valve body It curves without cooperating with the inner surface of the storage unit, without being assisted by the inner surface of the valve body storage unit, and without being deformed by the head due to the head shape.

  In the connector valve body according to the present invention, the self-curved deformable portion has a cross-sectional shape perpendicular to the axis of the connector valve body having n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis. preferable. In other words, the self-curved deformable portion has a cross-sectional shape perpendicular to the axis of the connector valve body that does not have n-fold rotational symmetry with respect to the axis (n is an integer of 2 or more), that is, only one-time rotational symmetry. It is preferable to have. Thus, the cross-sectional shape of the connector valve body according to the present invention is the first when the connector valve body is rotated 360 °, that is, one turn around the axis line of the connector valve body, which normally coincides with the axis line of the self-curving deformed portion. It matches the cross-sectional shape before rotation. Here, “symmetry” and “asymmetry” include not only geometrically accurate symmetry or asymmetry but also substantial symmetry or asymmetry without departing from the object of the present invention. Thus, when the self-curving deformable portion has n-fold rotational asymmetry (n is an integer other than 1), the self-curving deformable portion has a strong resistance portion having a strong resistance to pressure acting in the axial direction and the pressure. There is a weak resistance portion with a low resistance to. When a pressure is applied to the connector valve body according to the present invention in the axial direction, the strong resistance portion is not substantially curved or slightly curved, whereas the weak resistance portion is largely curved, The entire connector valve body according to the invention is curved toward the weak resistance portion side in the valve body housing portion 16. In the connector valve body according to the present invention, the cross-sectional shape having n-fold rotational asymmetry (n is an integer other than 1), that is, the strong resistance portion and the weak resistance portion only have to exist in the self-curved deformation portion, and its axis It may exist in the whole self-curvature deforming part along the direction, or may exist in a part of the region. In the present invention, “curved” means that the connector valve body and / or the self-curved deformable portion according to the present invention bends in an arcuate shape or the like in one radial direction with respect to the axial direction in which pressure acts. In other words, it can be called flexion, buckling, bay buckling or tilting.

  The self-curvature deforming portion preferably has a lumen extending along the axis of the connector valve body, and extends along the axis of the connector valve body, and at least one columnar body described later. More preferably, it has an enclosed lumen. That is, it is preferable that the self-curving deformable portion has a hollow shape having a lumen. When the self-curving deformable portion has such a lumen, a hollow self-curving deformable portion, for example, a columnar body to be described later that becomes the self-curving deformable portion is more easily curved, and has a specific directionality. It curves quickly and easily with good reproducibility.

  Such a self-curving deformable portion may be configured to bend as described above. For example, the self-curving deformable portion extends in the axial direction of the connector valve body according to the present invention and is loaded by the needleless tubular body 81. It is preferable to have at least one columnar body that is curved by this axial pressure. Further, the self-curving deformable portion is (1) at least one columnar body arranged along the circumferential direction so as to surround the axis of the connector valve body according to the present invention, and (2) the connector valve according to the present invention. It is even more preferable to have a plurality of columnar bodies arranged so as to sandwich the axis of the body, and (3) one columnar body having an axis different from the axis of the connector valve body according to the present invention.

  In at least one or a plurality of columnar bodies in (1), at least one selected from the group consisting of the arrangement position, the cross-sectional shape perpendicular to the axis of the connector valve body according to the present invention, and the cross-sectional area of this cross-sectional shape It is preferable that the cross-sectional shape perpendicular to the axis line of the connector valve body according to the present invention is rotationally asymmetric with respect to the axis line in the self-curvature deforming portion. Further, in at least one or the plurality of columnar bodies in (2), at least one selected from the group consisting of a cross-sectional shape perpendicular to the axis of the connector valve body according to the present invention and a cross-sectional area of the cross-sectional shape is different. Accordingly, it is preferable that the cross-sectional shape perpendicular to the axis of the connector valve body according to the present invention in the self-curving deformable portion is rotationally asymmetric with respect to the axis. Here, the arrangement positions of the columnar bodies include the interval between adjacent columnar bodies, the distance from the axis of the connector valve body according to the present invention, and the directionality of the cross-sectional shape perpendicular to the axis of the connector valve body according to the present invention. In addition, the cross-sectional area of the columnar body includes a difference in at least one of the thickness and the width of the cross-sectional shape in the columnar body. When the n-fold rotational asymmetry (n is an integer other than 1) of the self-curved deformable portion is formed by different columnar bodies selected from the group, the connector valve body according to the present invention has the structure Despite being easy, it curves with a certain direction and good reproducibility.

  The self-curving deformable portion preferably has at least one through hole or notch that opens in a direction intersecting the axis of the self-curving deformable portion, and at least one that opens in a direction perpendicular to the axis. More preferably, it has a through hole or a notch. When the self-curving deformable portion has such a through hole or notch, the self-curving deformable portion formed of a columnar body that connects the head portion and the bottom portion is more easily curved. It is preferable that at least one of the through hole or the notch is open to the outer peripheral surface near the bottom or the outer peripheral surface of the bottom so as to communicate the lumen with the outside of the connector valve body according to the present invention. Preferably, at least one of them extends to the vicinity of the bottom along the axis of the self-curving deformable portion. When the through-hole or the notch is configured in this way, the self-curving deformable portion is curved with a specific direction and reproducibility, and the inside of the self-curving deformable portion can also be used as a fluid flow path. The connector according to the invention can be further reduced in size and weight. In the connector valve body according to the present invention, as long as the self-curving deformable portion is curved in one radial direction, the dimensions of the columnar body, the lumen, and the notch portion can be appropriately set.

  The connector valve body according to the present invention is preferably made of an elastic material and has elasticity in that the bending property and the sealing property can be efficiently expressed. For example, it is preferable that the connector valve body according to the present invention has an elasticity for expressing a JIS A hardness of 30 to 70. Examples of elastic materials that exhibit such hardness include various rubbers and various elastomers. Examples of the rubber include silicone rubber, 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 fluorine rubber. . Examples of the elastomer include a styrene thermoplastic elastomer, a polyolefin thermoplastic elastomer, a polyvinyl chloride thermoplastic elastomer, a polyurethane thermoplastic elastomer, a polyester thermoplastic elastomer, a polyamide thermoplastic elastomer, a polybutadiene thermoplastic elastomer, Examples thereof include trans polyisoprene-based thermoplastic elastomers, fluororubber-based thermoplastic elastomers, and chlorinated polyethylene-based thermoplastic elastomers. The connector valve body according to the present invention can be manufactured by molding or processing these elastic members by a conventional method.

  The connector valve body according to the present invention will be specifically described with reference to the drawings. A connector valve body (hereinafter sometimes referred to as a valve body) 5A, which is an example of a connector valve body according to the present invention, is formed of an elastic material so as to exhibit the JIS A hardness in the above range. As shown in FIG. 8, a connector pipe, for example, three connection ports 12 to 14 to which a tube body can be connected shown in FIG. 8, a flow path 15 that connects these connection ports 12 to 14, and the first connection port 12. The flow of the fluid that is housed in the connector pipe 4 having the valve body housing portion 16 disposed so as to be adjacent to the connection port 12 along the axis of the The connection port 12 is opened and closed by inserting and removing the needleless tube 81.

  The valve body 5A is disposed on a head 21 that functions as a plug portion 21 that seals the first connection port 12 and a downstream extension line of the head 21 in the direction of the axis C of the valve body 5A. A pressure acting on the axis C direction between the solid bottom portion 22 abutted and supported by the support portion 17 of the storage portion 16 and the head portion 21 and the bottom portion 22 along the axis C direction of the valve body 5A. And a self-curvature deforming portion 23a that curves in one radial direction. In other words, the valve body 5A is connected to the head 21 along the axis C direction from the head 21 and is curved in one direction with respect to the axis C direction by pressure acting in the axis C direction. The body portion 24a has a body portion 24a and a solid bottom portion 22 that is connected to the body portion 24a and supported in the valve body storage portion 16.

  The head portion 21 only needs to have a shape and a dimension capable of liquid-tightly sealing the first connection port 12 of the connector pipe 4. Even if the head portion 21 is compressed in the axial direction by pressure acting in the axial direction of the head portion 21. The shape is not curved in the radial direction with respect to the axial direction. Specifically, the head 21 is a solid cylindrical shape having a constant outer diameter having a flat outer peripheral surface that does not have a groove or a recess (also referred to as a notch) extending in the circumferential direction. . When the head 21 has such a shape, the pressure by the needleless tubular body 81 acting in the direction of the axis C of the valve body 5A can be transmitted without loss to the self-curvature deforming portion 23a. The curve of the portion 23a in a specific direction is more quickly and easily made. As shown in FIGS. 1 and 8, the head 21 has a surface exposed to the first connection port 12, that is, a top surface 21a thereof, which is a flat surface on which a groove or a slit for guiding fluid is not formed. ing. Thus, when the top surface 21a of the head 21 is a flat surface, the first connection port 12 and the top surface 21a can be easily cleaned, and propagation of bacteria and the like can be suppressed. In the valve body 5A, the top surface 21a is horizontal with respect to the axis C of the valve body 5A, but may be inclined with respect to the axis C.

  The bottom portion 22 only needs to have a shape and a size that are abutted and supported by the support portion 17 of the valve body storage portion 16, and has a pointed shape, a semispherical shape, a semi-spherical shape whose outer diameter gradually decreases toward the end portion. It has an elliptical spherical shape and a dome shape. The top surface of the bottom portion 22 facing the self-curvature deforming portion 23a is perpendicular to the axis C. The bottom 22 supports the valve body 5A and assists the bending of the self-curvature deforming portion 23a. Therefore, the bottom 22 preferably has a certain degree of rigidity, and the valve body 5A is solid.

  As shown in FIG. 1A and FIG. 1B, the self-curvature deforming portion 23a is disposed between the head 21 and the bottom 22, and the axis of the head 21 and the bottom 22 is substantially the same. Are connected to match each other. Accordingly, the entire self-curvature deforming portion 23a functions as the body portion 24a. The self-curvature deforming portions 23a extend in the direction of the axis C and are arranged at equal intervals along the circumferential direction so as to surround the axis C, as clearly shown in FIG. A first columnar body 31a and a second columnar body 32a, and a lumen 26a extending along the axis C and surrounded by the first columnar body 31a and the second columnar body 32a The three columnar bodies 31a are formed between the first columnar body 31a and the second columnar body 32a, and are opened in a direction intersecting with the axis of the self-curving deformable portion 23a. The cross-sectional shape perpendicular to the axis has n-fold rotational asymmetry with respect to the axis C (n is an integer other than 1).

  As shown in FIG. 1A, the first columnar body 31a and the second columnar body 32a have a constant thickness over the entire direction of the axis C, and have two cross-sectional shapes perpendicular to the axis C. It is a partial annular wall having a central angle of about 60 ° surrounded by concentric circular arcs and a line segment connecting these centers, and is curved by pressure acting in the direction of the axis C. The partial annular wall has a shape obtained by removing a sector having a small radius arc from a sector having a large radius arc. The first columnar body 31a has a concentric radius difference, that is, a thickness larger than that of the second columnar body 32a. That is, the self-curving deformable portion 23a has n-fold rotational asymmetry (n is an integer other than 1) over the entire axial direction due to the different cross-sectional shape and cross-sectional area of the first columnar body 31a and the second columnar body 32a. ) That is, it has only one-time rotational symmetry and does not have n-time rotational symmetry (n is an integer of 2 or more). The first columnar body 31a and the second columnar body 32a have their outer surfaces flush with the outer peripheral surface of the bottom portion 22, that is, the first columnar body 31a and the second columnar body 32a. The virtual circumscribed circle circumscribing the cross-sectional shape, that is, the diameter of the self-curvature deforming portion 23a and the diameter of the bottom portion 22 and the head portion 21 are arranged upright on the bottom portion 22.

  The notch 40a opens in the direction perpendicular to the axis C, in other words, opens in a virtual circumference of a virtual circumscribed circle circumscribing the columnar bodies 31a and 32a in a cross-sectional shape perpendicular to the axis C of the self-curving deformable portion 23a. doing. The notch 40a extends to the bottom 22 along the axis of the self-curvature deforming portion 23a coinciding with the axis C of the valve body 5A, that is, lacks, and the lumen 26a has a first columnar body 31a and an annularly arranged first columnar body 31a. It is located inside the second columnar body 32a and the three cutouts 40a. The lumen 26a communicates with the outside of the valve body 5A by notches 40a alternately arranged with the first columnar body 31a and the second columnar body 32a. Therefore, the lumen 26a can also be referred to as an open lumen. The lumen 26a and the cutout portion 40a assist the bending of the self-curving deformable portion 23a, the lumen 26a serves as a fluid flow path, and the cutout portion 40a It also functions as a channel entrance.

  The self-curvature deforming portion 23a is composed of the first columnar body 31a and the second columnar body 32a, the lumen 26a, and the cutout portion 40a. The first columnar body 31a and the second columnar body 32a having different thicknesses, which are erected on the top surface of the bottom portion 22 so as to sandwich the head 22, support the head 21. The self-curvature deforming portion 23a configured in this way has the first columnar body 31a and the second columnar body, although the first columnar body 31a and the second columnar body 32a are arranged at equal intervals in the circumferential direction. Since the thickness, that is, the cross-sectional area of the body 32a is different from that of the body 32a, the region where the first columnar bodies 31a are arranged becomes the strong resistance portion 25a having a strong resistance to the pressure acting in the direction of the axis C. The vicinity of 32a is a weak resistance portion 25b having a low resistance to pressure, and has a cross-sectional shape of n-fold rotational asymmetry (n is an integer other than 1). The self-curvature deforming portion 23a has a lumen 26a and a cutout portion 40a, and the head portion 21 has a solid cylindrical shape. Therefore, when the pressure in the direction of the axis C acts on the valve body 5A having such a head 21 and the self-curving deformable portion 23a, this pressure directly acts on the self-curved deforming portion 23a without loss and rotates n times. For example, as shown in FIG. 8B, the self-curved deforming portion 23a having asymmetrical (n is an integer other than 1) is slightly curved while the strong resistance portion 25a is slightly curved, as shown in FIG. 8B. By doing so, it is curved in one radial direction, that is, in the radial direction from the axis C to the second columnar body 32a, that is, on the weak resistance portion 25b side. In this way, the valve body 5A is also bent in the same manner as a whole.

  A valve body 5B, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23b is different as shown in FIG. . That is, the valve body 5B has a head portion 21 (not shown), a self-curvature deforming portion 23b, and a bottom portion 22 (not shown). A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2A, the self-curvature deforming portion 23b is basically the same as the self-curvature deformable portion 23a except that the columnar body and the notch are different. Two columnar bodies 32b, a lumen 26a surrounded by these columnar bodies 31b and 32b, and two notches 40b formed between the two columnar bodies 31b and 32b, and the cross-sectional shape is an axis. N-fold rotational asymmetry with respect to C (n is an integer other than 1). The first columnar body 31b and the second columnar body 32b are basically the same as the first columnar body 31a and the second columnar body 32a except that the central angle of the partial annular wall is about 120 °. The first columnar body 31b has a thickness larger than that of the second columnar body 32b. The notch 40b is basically the same as the notch 40a except that the opening width is different.

  The self-curvature deforming portion 23b has an n-fold rotational asymmetry (n is a thickness near the first columnar body 31b with a large thickness becomes the strong resistance portion 25a, and a portion near the second columnar body 32b with a small thickness becomes the weak resistance portion 25b. (Integer other than 1). The self-curvature deforming portion 23b has a lumen 26a and a cutout portion 40b, and the head portion 21 has a solid cylindrical shape. Therefore, when pressure in the direction of the axis C acts on the valve body 5B, the valve body 5B is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 2B, the valve body 5C, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23c is different. is there. That is, the valve body 5C has a head 21 (not shown), a self-curvature deforming portion 23c, and a bottom 22 (not shown). The description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2B, the self-curvature deforming portion 23c is basically the same as the self-curvature deformable portion 23a except that the columnar body and the notch are different, and the three first columnar bodies 31c. And one second columnar body 32c, a lumen 26a surrounded by these columnar bodies 31c and 32c, and four notches 40c formed between the four columnar bodies 31c and 32c, The cross-sectional shape has n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. The first columnar body 31c and the second columnar body 32c are basically the same as the first columnar body 31a and the second columnar body 32a except that the central angle of the partial annular wall is about 45 °. The first columnar body 31c has a thickness larger than that of the second columnar body 32c. The notch 40c is basically the same as the notch 40a except that the opening width is different.

  The self-curving deformable portion 23c is asymmetrically rotated n times in which the region where the thick first columnar bodies 31c are arranged becomes the strong resistance portion 25a and the vicinity of the thin second columnar body 32c becomes the weak resistance portion 25b. (N is an integer other than 1). The self-curvature deforming portion 23c has a lumen 26a and a notch 40c, and the head portion 21 has a solid cylindrical shape. Therefore, when pressure in the direction of the axis C acts on the valve body 5C, the valve body 5C is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  A valve body 5D, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23d is different as shown in FIG. 2 (c). . That is, the valve body 5D has a head portion 21 (not shown), a self-curvature deforming portion 23d, and a bottom portion 22 (not shown). A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2C, the self-curvature deforming portion 23d is basically the same as the self-curvature deformable portion 23a except that the columnar body and the notch are different, and the two first columnar bodies 31d. And one second columnar body 32d, a lumen 26a surrounded by these columnar bodies 31d and 32d, and three cutouts 40d formed between the three columnar bodies 31d and 32d, The cross-sectional shape has n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. Although the first columnar body 31d and the second columnar body 32d have the same thickness, the first columnar body 31a and the second columnar body are different except that the central angle (also referred to as width) of the partial annular wall is different. It is basically the same as 32a, and the central angle of the first columnar body 31d is larger than that of the second columnar body 32d. The notch 40d is basically the same as the notch 40a except that the opening width is different.

  The self-curved deformation portion 23d is n times rotationally asymmetric in which the region where the first columnar bodies 31d having a large central angle are arranged becomes the strong resistance portion 25a, and the vicinity of the second columnar body 32d having the small central angle becomes the weak resistance portion 25b. (N is an integer other than 1). The self-curvature deforming portion 23d has a lumen 26a and a cutout portion 40d, and the head portion 21 has a solid cylindrical shape. Therefore, when the pressure in the direction of the axis C acts on the valve body 5D, the valve body 5D is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 2D, a valve body 5E, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23e is different. is there. That is, the valve body 5E has a head 21 (not shown), a self-curvature deforming portion 23e, and a bottom 22 (not shown). A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2D, the self-curvature deforming portion 23e is basically the same as the self-curvature deformable portion 23a except that the columnar body and the notch are different, and the three first columnar bodies 31e. And one second columnar body 32e, a lumen 26a surrounded by these columnar bodies 31e and 32e, and two first cutouts 41e and two formed between the columnar bodies 31e and 32e. The cross-sectional shape has n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. The first columnar bodies 31e and the second columnar bodies 32e are basically the same as the first columnar bodies 31a except that their numbers and arrangement positions are different, and the intervals between the first columnar bodies 31e, that is, notches. The opening width of the portion 41e is smaller than the interval between the first columnar body 31e and the second columnar body 32e, that is, the opening width of the notch 42e. The self-curving deformable portion 23e has n-fold rotational asymmetry (n is an integer other than 1) due to the difference in the number and arrangement positions of the first columnar bodies 31e and the second columnar bodies 32e. The first cutout 41e is formed between the first columnar bodies 31e, and the second cutout 42e is formed between the first columnar body 31e and the second columnar body 32e. The part 41e and the second notch part 42e are basically the same as the notch part 40a except that their opening widths are different.

  In the self-curvature deforming portion 23e, the region where the first columnar bodies 31e arranged at a small interval are arranged becomes the strong resistance portion 25a, and the vicinity of the second columnar bodies 32e arranged at a large interval becomes the weak resistance portion 25b. The cross-sectional shape has n-fold rotational asymmetry (n is an integer other than 1). The self-curving deformable portion 23e has a lumen 26a, a first cutout portion 41e, and a second cutout portion 42e, and the head portion 21 has a solid cylindrical shape. Therefore, when the pressure in the direction of the axis C acts on the valve body 5E, the valve body 5E is bent in one radial direction, that is, in the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 2E, the valve body 5F, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23f is different. is there. That is, the valve body 5F has a head portion 21 (not shown), a self-curvature deforming portion 23f, and a bottom portion 22 (not shown). The description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2E, the self-curvature deforming portion 23f is basically the same as the self-curvature deformable portion 23a except that the columnar body and the notch are different, and the five first columnar bodies 31f. And two second columnar bodies 32f, a lumen 26b surrounded by these columnar bodies 31f and 32f, four first cutouts 41f formed between these columnar bodies 31f and 32f, The second cut-out portion 42f and one third cut-out portion 43f are included, and the cross-sectional shape has n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. . The first columnar body 31f and the second columnar body 32f are basically the same as the first columnar body 31a except that their cross-sectional shapes and arrangement positions are different, and the distance between the first columnar bodies 31f. The distance between the first columnar body 31f and the second columnar body 32f increases in the order of the distance between the second columnar bodies 32f. The self-curved deforming portion 23f has n-fold rotational asymmetry (n is an integer other than 1) due to the disposition positions of the first columnar body 31f and the second columnar body 32f being different. The first cutout portion 41f is formed between the first columnar bodies 31f, and the second cutout portion 42f is formed between the first columnar body 31f and the second columnar body 32f. The portion 43f is formed between the second columnar bodies 32f, and the cutout portions 41f to 43f are basically the same as the cutout portion 40a except that their cross-sectional shapes and opening widths are different.

  In the self-curved deforming portion 23f, the region where the first columnar bodies 31f arranged at the smallest interval is arranged becomes the strong resistance portion 25a, and the region where the second columnar bodies 32f arranged at the largest interval are arranged. It has a cross-sectional shape of n-fold rotational asymmetry (n is an integer other than 1) serving as the weak resistance portion 25b. The self-curving deformable portion 23f has a lumen 26b and cutout portions 41f to 43f, and the head portion 21 has a solid cylindrical shape. Therefore, when the pressure in the direction of the axis C acts on the valve body 5F, the valve body 5F is bent in one radial direction, that is, in the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  A valve body 5G, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23g is different, as shown in FIG. 2 (f). . That is, the valve body 5G has a head portion 21 (not shown), a self-curvature deforming portion 23g, and a bottom portion 22 (not shown). A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2 (f), the self-curvature deforming portion 23g is basically the same as the self-curvature deformable portion 23a except that the columnar body and the cutout portion are different. Two columnar bodies 32g, a lumen 26c surrounded by the columnar bodies 31g and 32g, and a first cutout portion 41g and a second cutout portion 42g formed between the columnar bodies 31g and 32g. The cross-sectional shape has n-fold rotational asymmetry with respect to the axis C (n is an integer other than 1) over the entire axial direction. The first columnar body 31g and the second columnar body 32g are basically the same as the first columnar body 31a and the second columnar body 32a except that the cross-sectional shapes are different, and the first columnar body 31g The cross section perpendicular to the axis C is substantially rectangular, and the second columnar body 32g has a substantially triangular cross section with a small cross sectional area. The first cutout portion 41g and the second cutout portion 42g are basically the same as the cutout portion 40a except that the opening width and the cross-sectional shape thereof are different.

  In the self-curving deformed portion 23g, a region where the first columnar bodies 31g having a large sectional area and a rectangular section are arranged becomes the strong resistance portion 25a, and the vicinity of the second columnar body 32g having a small sectional area and a triangular section is the weak resistance portion 25b. N-fold rotational asymmetry (where n is an integer other than 1). The self-curved deforming portion 23g has a lumen 26c and cutout portions 41g and 42g, and the head portion 21 has a solid cylindrical shape. Therefore, when the pressure in the direction of the axis C acts on the valve body 5G, the valve body 5G is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 2G, the valve body 5H, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23h is different. is there. That is, the valve body 5H has a head portion 21 (not shown), a self-curvature deforming portion 23h, and a bottom portion 22 (not shown). A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2G, the self-curvature deforming portion 23h is basically the same as the self-curvature deformable portion 23a except that the columnar body and the cutout portion are different. Two columnar bodies 32h, a lumen 26a surrounded by these columnar bodies 31h and 32h, and two notches 40h formed between the two columnar bodies 31h and 32h, and the entire axial direction thereof. The cross-sectional shape has n-fold rotational asymmetry with respect to the axis C (n is an integer other than 1). The first columnar body 31h and the second columnar body 32h are basically the same as the first columnar body 31a and the second columnar body 32a except that the central angle (also referred to as width) of the partial annular wall is different. Thus, the first columnar body 31h has a central angle larger than that of the second columnar body 32h. The two cutout portions 40h are basically the same as the cutout portion 40a except that the opening widths thereof are different.

  The self-curvature deforming portion 23h has an n-fold rotational asymmetry (n is the vicinity of the first columnar body 31h having a large central angle becomes the strong resistance portion 25a and the vicinity of the second columnar body 32h having the small central angle is the weak resistance portion 25b. (Integer other than 1). The self-curvature deforming portion 23h has a lumen 26a and a cutout portion 40h, and the head portion 21 has a solid cylindrical shape. Therefore, when pressure in the direction of the axis C acts on the valve body 5H, the valve body 5H is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  A valve body 5I as another example of the connector valve body according to the present invention is basically the same as the valve body 5A except that the self-curvature deforming portion 23i is different as shown in FIG. 2 (h). . That is, the valve body 5I has a head 21 (not shown), a self-curvature deforming portion 23i, and a bottom 22 (not shown). A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2 (h), the self-curvature deforming portion 23i is basically the same as the self-curvature deformable portion 23a except that the columnar body and the cutout portion are different, and the five first columnar bodies 31i. And three second columnar bodies 32i, a lumen 26d surrounded by these columnar bodies 31i and 32i, four first cutouts 41i formed between these columnar bodies 31i and 32i, The second cutout portion 42i and the two third cutout portions 43i are configured to have an n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. . The first columnar body 31i and the second columnar body 32i are basically the same as the first columnar body 31a except that their cross-sectional shapes are different, and the first columnar body 31i is perpendicular to the axis C. The cross-sectional shape is substantially circular and that of the second columnar body 32i is substantially elliptical with a short axis parallel to the radial direction of the axis C. These cross-sectional areas are substantially the same. The self-curved deformation portion 23i has n-fold rotational asymmetry (n is an integer other than 1) due to the different cross-sectional shapes of the first columnar body 31i and the second columnar body 32i. The first notch 41i is formed between the first columnar bodies 31i, the second notch 42i is formed between the first columnar body 31i and the second columnar body 32i, and the third notch The portion 43i is formed between the second columnar bodies 38a, and the notches 41i to 43i are basically the same as the notch 40a except that their cross-sectional shapes and opening widths are different.

  In the self-curving deformable portion 23i, the region where the first columnar bodies 31i having a substantially circular cross section are arranged becomes the strong resistance portion 25a, and the region where the second columnar bodies 32i having a substantially elliptical cross section are arranged is the weak resistance portion 25b. N-fold rotational asymmetry (where n is an integer other than 1). The self-curvature deforming portion 23i has a lumen 26d and cutout portions 41i to 43i, and the head portion 21 has a solid cylindrical shape. Therefore, when pressure in the direction of the axis C acts on the valve body 5I, the valve body 5I is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 2 (i), a valve body 5J, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A and the valve body 5I except that the self-curvature deforming portion 23j is different. The same. That is, the valve body 5J has a head 21 (not shown), a self-curvature deforming portion 23j, and a bottom 22 (not shown). A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 2 (i), the self-curvature deforming portion 23j is basically the same as the self-curvature deformable portion 23a and the self-curvature deformable portion 23i except that the columnar body and the notch are different. The first columnar body 31j and the three second columnar bodies 32j, the lumen 26e surrounded by the columnar bodies 31j and 32j, and the four first first bodies formed between the columnar bodies 31j and 32j. The cut-out portion 41j, two second cut-out portions 42j, and two third cut-out portions 43j are composed of an n-fold rotational asymmetry with respect to the axis C over the entire axial direction (n is an integer other than 1). )have. The first columnar body 31j is basically the same as the second columnar body 32i except that the arrangement position, that is, the directionality of the cross-sectional shape is different, and the first columnar body 31j is parallel to the radial direction of the axis C. It is approximately oval with a major axis. The notches 41j to 43j are basically the same as the notch 40a except that their cross-sectional shapes and opening widths are different.

  In the self-curved deforming portion 23j, the region where the first columnar bodies 31j whose major axis is parallel to the radial direction is the strong resistance portion 25a, and the second columnar body having a substantially elliptical cross section whose minor axis is parallel to the radial direction. A region where 32j is arranged has a cross-sectional shape of n-fold rotational asymmetry (n is an integer other than 1) in which the weak resistance portion 25b is formed. The self-curvature deforming portion 23j has a lumen 26e and cutout portions 41j to 43j, and the head portion 21 has a solid cylindrical shape. Therefore, when pressure in the direction of the axis C acts on the valve body 5J, the valve body 5J is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  An inner valve body 5K, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A and the valve body 5G, except that the self-curvature deforming portion 23k is different, as shown in FIG. The same. That is, the inner valve body 5K has a head 21 (not shown), a self-curvature deforming portion 23k, and a bottom 22 (not shown). A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 3A, the self-curvature deforming portion 23k is basically the same as the self-curvature deformable portions 23a and 23g except that the columnar body and the notch are different, and the first columnar body 31k. And the second columnar body 32k, the lumen 26f surrounded by the columnar bodies 31k and 32k, and the first cutout portion 41k and the second cutout portion 42k formed between the columnar bodies 31k and 32k. The cross-sectional shape has n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. The first columnar body 31k is basically the same as the first columnar body 31g, and the second columnar body 32k is basically the same as the first columnar body 31g except that the cross-sectional shape is different. The thickness of the first columnar body 31k is larger than that of the second columnar body 32k. The first cutout portion 41k and the second cutout portion 42k are basically the same as the cutout portion 40a except that the opening width and the cross-sectional shape thereof are different.

  The self-curvature deforming portion 23k is n-fold rotationally asymmetric in which the region where the first columnar bodies 31k having a large thickness are arranged becomes the strong resistance portion 25a and the vicinity of the second columnar body 32k having the small thickness becomes the weak resistance portion 25b. (N is an integer other than 1). The self-curvature deforming portion 23k has a lumen 26f and cutout portions 41k and 42k, and the head portion 21 has a solid cylindrical shape. Therefore, when a pressure in the direction of the axis C acts on the valve body 5K, the valve body 5K is bent in one radial direction, that is, in the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 3B, the valve body 5L, which is another example of the connector valve body according to the present invention, is different from the valve body 5A and the inner valve body 5K except that the self-curvature deforming portion 23l is different. Basically the same. That is, the valve body 5L has a head 21 (not shown), a self-curvature deforming portion 23l, and a bottom 22 (not shown). A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 3B, the self-curvature deforming portion 23l is basically the same as the self-curvature deformable portions 23a and 23k except that the columnar body and the notch are different, and the first columnar body 31l. And the second columnar body 32l, the lumen 26g surrounded by the columnar bodies 31l and 32l, and the first cutout portion 41l and the second cutout portion 42l formed between the columnar bodies 31l and 32l. The cross-sectional shape has n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. The first columnar body 31l is basically the same as the first columnar body 31g, and the second columnar body 32l is basically the same as the first columnar body 31g except that the width is different. The width of one columnar body 31l is larger than that of the second columnar body 32l. The first cutout portion 41l and the second cutout portion 42l are basically the same as the cutout portion 40a except that the opening width and the cross-sectional shape thereof are different.

  The self-curved deformed portion 23l has an n-fold rotational asymmetry in which the region where the first columnar bodies 31l having a large width are arranged becomes the strong resistance portion 25a and the vicinity of the second columnar body 32l having the small width becomes the weak resistance portion 25b. n is an integer other than 1). The self-curvature deforming portion 23l has a lumen 26g and cutout portions 41l and 42l, and the head portion 21 has a solid cylindrical shape. Therefore, when the pressure in the direction of the axis C acts on the valve body 5L, the valve body 5L is bent in the same radial direction, that is, in the weak resistance portion 25b side in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  A valve body 5M, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23m is different as shown in FIG. 3 (c). . That is, the valve body 5M has a head 21 (not shown), a self-curvature deforming portion 23m, and a bottom 22 (not shown). A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 3C, the self-curvature deforming portion 23m is basically the same as the self-curvature deformable portion 23a except that the columnar body is different and does not have a cutout portion. A body 31m and a second columnar body 32m, and a lumen 26h surrounded by the columnar bodies 31m and 32m, and the cross-sectional shape is n times asymmetry with respect to the axis C over the entire axial direction (n is An integer other than 1). The first columnar body 31m and the second columnar body 32m are different in the central angle (also referred to as width) of the partial annular wall and are connected to each other to make a round, so that the first columnar body 31a and the second columnar body 31m. It is basically the same as 32a, and the width of the first columnar body 31m is larger than that of the second columnar body 32m. Since the self-curvature deforming portion 23m does not have a through-hole and a notch that open to the outside of the valve body 5M, the inner cavity 26h is a sealed space that does not communicate with the outside of the valve body 5M, and serves as a fluid flow path. Must not. In the present invention, at least two through-holes communicating with the lumen 26h can be drilled in any of the first columnar body 31m, the second columnar body 32m, and the bottom portion 22. In this case, The position where the through holes are drilled in the first columnar body 31m and the second columnar body 32m is preferably the outer peripheral surface near the bottom in terms of reducing the remaining amount of fluid, while the through hole is drilled in the bottom 22. The position is preferably the outer peripheral surface of the bottom, particularly the outer peripheral surface of the tip, from the viewpoint of reducing the remaining amount of fluid.

  The self-curvature deforming portion 23m has n-fold rotational asymmetry (n is a value near the first columnar body 31m having a large central angle becomes the strong resistance portion 25a, and the vicinity of the second columnar body 32m having a small central angle is the weak resistance portion 25b. (Integer other than 1). The self-curvature deforming portion 23m has an inner lumen 26h, and the head portion 21 has a solid cylindrical shape. Therefore, when pressure in the direction of the axis C acts on the valve body 5M, the valve body 5M is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 3D, the valve body 5N, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23n is different. is there. That is, the valve body 5N has a head 21 (not shown), a self-curvature deforming portion 23n, and a bottom 22 (not shown). A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 3D, the self-curvature deforming portion 23n is basically the same as the self-curvature deformable portion 23a except that the columnar body and the notch are different, and is arranged so as to sandwich the axis C. One first columnar body 31n and one second columnar body 32n, a lumen 26i surrounded by these columnar bodies 31n and 32n, and two notches formed between the columnar bodies 31n and 32n The cross section has an n-fold rotational asymmetry (n is an integer other than 1) with respect to the axis C over the entire axial direction. The first columnar body 31n and the second columnar body 32n are basically the same as the first columnar body 31a and the second columnar body 32a except that the shapes are different. In addition, the cross section is a substantially rectangular flat wall, and the thickness of the first columnar body 31n is larger than that of the second columnar body 32n. The self-curvature deforming portion 23n has n-fold rotational asymmetry (n is an integer other than 1) due to the different cross-sectional shapes and cross-sectional areas of the first columnar body 31n and the second columnar body 32n. The inside of the notch 40n is basically the same as the notch 40a except that the opening width is different.

  The self-curvature deforming portion 23n has an n-fold rotational asymmetry (n is a value near the first columnar body 31n having a large thickness becomes the strong resistance portion 25a, and a portion near the second columnar body 32n having the small thickness is the weak resistance portion 25b. (Integer other than 1). The self-curvature deforming portion 23n has a lumen 26i and a notch 40n, and the head portion 21 has a solid cylindrical shape. Therefore, when the pressure in the direction of the axis C acts on the valve body 5N, the valve body 5A is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 3E, the valve body 5P, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23p is different. is there. That is, the valve body 5P has a head 21 (not shown), a self-curvature deforming portion 23p, and a bottom 22 (not shown). A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 3E, the self-curvature deforming portion 23p is basically the same as the self-curvature deformable portion 23a except that the columnar body and the notch are different, and is erected on the top surface of the bottom portion 22. The columnar body 30p that connects the head portion 21 and the bottom portion 22 and has a cross-sectional area smaller than the cross-sectional area of the head portion 21 and the bottom portion 22 is a substantially trapezoidal flat wall shape, and the columnar body 30p The columnar body 30p has an axis Cp different from the axis C of the valve body 5P over the entire axial direction. The first notch 41p and the second notch 42p are formed on both surface sides. Yes. The columnar body 30p is basically the same as the first columnar body 31a and the like except that the cross-sectional shape, cross-sectional area, and arrangement position are different. The self-curved deformation portion 23p has n-fold rotational asymmetry (n is an integer other than 1) because the axis Cp of the columnar body 30p is different from the axis C. The two cutout portions 41p and 42p are basically the same as the cutout portion 40a except that the cutout portions 41p and 42p are cut out from the head 21 to the bottom portion 22 in an arcuate cross section, and the first cutout portion 41p is the second cutout portion 42p. The amount of resection, particularly the horizontal depth, is smaller.

  The self-curving deformable portion 23p has n-fold rotational asymmetry in which the first notch 41p side of the columnar body 30p having the axis Cp that does not coincide with the axis C becomes the strong resistance portion 25a and the second notch 42p side becomes the weak resistance portion 25b. (N is an integer other than 1). The self-curvature deforming portion 23p has a solid cylindrical head portion 21. Therefore, when the pressure in the direction of the axis C acts on the valve body 5P, the valve body 5P is bent in one radial direction, that is, the weak resistance portion 25b side, basically in the same manner as the valve body 5A and the self-curvature deforming portion 23a.

  As shown in FIG. 4, a valve body 5Q, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the self-curvature deforming portion 23q is different. That is, the valve body 5Q has a head portion 21, a self-curvature deforming portion 23q, and a bottom portion 22. A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 4, the self-curvature deforming portion 23q is basically the same as the self-curvature deformable portion 23a except that the columnar bodies are different, and is different from the first columnar body 31a and the second columnar body 32q. The inner space 26a is surrounded by the columnar bodies 31a and 32q, and the three cutout portions 40a are formed between the columnar bodies 31a and 32q. It has n-fold rotational asymmetry (n is an integer other than 1). The columnar bodies 30p, 31a to 31p and 32a to 32p in the valve bodies 5A to 5P all have a constant thickness in the direction of the axis C, whereas the second columnar body 32q has a thickness approximately at the center in the direction of the axis C. The thickness gradually decreases from the bottom surface of the head 21 and the top surface of the bottom portion 22 so as to be thinner. Similar to the self-curving deformation portion 23a, the self-curving deformation portion 23q is n times in which the region where the first columnar bodies 31a are arranged becomes the strong resistance portion 25a and the vicinity of the second columnar body 32q becomes the weak resistance portion 25b. It has a cross-sectional shape with rotational asymmetry (n is an integer other than 1), and when the pressure in the direction of the axis C acts on the valve body 5Q, the valve body 5Q is bent in one radial direction, that is, on the weak resistance portion 25b side. The second columnar body 32q is more easily bent because the thickness of the central portion is thin. In the valve body 5Q, the thickness of only the second columnar body 32q in the direction of the axis C is changed. In the present invention, the thickness of the first columnar body 31a is changed in the direction of the axis C. For example, the thickness of the first columnar body 31a may be changed to be thicker or thinner. Although the thickness of the first columnar body 31a and the second columnar body 32q may both be changed to be thin, the first columnar body 31a is thickened and the second columnar body 32q is thin. If it is changed so as to become, the self-curving deformable portion is more easily curved.

  The valve body 6A which is another example of the connector valve body according to the present invention is basically the same as the valve body 5A except that the head 51a is different as shown in FIG. Since the self-curvature deforming portion 23a is the same as that of the valve body 5A, when the pressure in the direction of the axis C is applied to the valve body 6A, the valve body 5A is bent in one radial direction. A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 5 (a), the head 51 a has a cylindrical shape having a flat outer peripheral surface having a constant outer diameter and a plug portion 52 that seals the first connection port 12. It has a bulging portion (also referred to as a flange portion) 53 that is connected to the end surface and projects annularly from the peripheral surface of the plug portion 52 in the radial direction. Both the plug portion 52 and the bulging portion 53 are solid and are not bent by pressure acting in the direction of the axis C. The bulging portion 53 has an outer diameter that does not contact or contact the inner peripheral surface of the valve body storage portion 16.

  As shown in FIG. 5B, the valve body 6B, which is another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the head 51b is different. Since the self-curvature deforming portion 23a is the same as that of the valve body 5A, when the pressure in the direction of the axis C acts on the valve body 6B, the valve body 6B bends in one radial direction like the valve body 5A. A description of the same configuration as that of the valve body 5A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 5B, the entire head 51 b is a plug, and the top surface 54 that appears at the first connection port 12 is a curved surface that bulges outside the connection port 12. . Similar to the top surface of the valve body 5A, the top surface 54 is a flat surface in which grooves or slits for guiding fluid or the like are not formed.

  As shown in FIGS. 5C and 5D, the valve body 6C, which is still another example of the connector valve body according to the present invention, is basically the same as the valve body 5A except that the bottom portion 56 is different. Since it has the same self-curvature deforming portion 23a as that of the valve body 5A, when the pressure in the direction of the axis C acts on the valve body 6C, the valve body 5A is bent in one radial direction like the valve body 5A. . The description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIGS. 5 (c) and 5 (d).

  As shown in FIGS. 5C and 5D, the bottom portion 56 has a conical portion 57 that protrudes from the entire top surface toward the self-curving deformable portion 23a and gradually taper. . When the bottom portion 56 has the conical portion 57 that protrudes from the self-curving deformable portion 23a as described above, for example, when the lumen 26a functions as a fluid flow path, the fluid remaining in the lumen 26a remains. The amount can be reduced and the desired amount of fluid can be administered to the patient without loss. In addition, in this invention, although the cone-shaped part should just be formed so that it may connect with a notch part at least, it may be formed in the whole top surface like the valve body 6C, and it may be formed in a part of top surface. It may be formed. Further, the shape protruding to the self-curving deformable portion 23a is not limited to the cone shape, and any shape that can guide or lead the fluid in the lumen 26a to the notch portion 40a may be used. A frustum-shaped part may be sufficient.

  As shown in FIGS. 6A and 6B, the valve body 7A, which is another example of the connector valve body according to the present invention, is different from the self-curvature deforming portion 61a and the bottom portion 62a. This is basically the same as the body 5A. That is, the valve body 7A has a head portion 21, a self-curving deformable portion 61a, and a bottom portion 62a, and controls the flow of fluid that is housed in the connector tube 4 of the connector according to the present invention and flows through the connector tube 4. . A description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIGS. 6 (a) and 6 (b).

  As shown in FIGS. 6A and 6B, the self-curving deformable portion 61a and the bottom portion 62a are first flat plate-like shapes that are connected substantially in parallel from one end surface of the head 21. The columnar body 63a and the second columnar body 64a and a bottom 62a that connects these end portions are integrally formed in a substantially U shape in a side view. The self-curvature deforming portion 61a is a columnar shape that intersects with the columnar bodies 63a and 64a, a lumen 66a as a space sandwiched between the columnar bodies 63a and 64a, and the axis of the self-curved deformable portion 61a. It consists of two notches 67a that open in the width direction of the bodies 63a and 64a. The first columnar body 63a and the second columnar body 64a are arranged at an equal distance from the axis C so as to sandwich the axis C of the valve body 7A, and the thickness of the first columnar body 63a is the first columnar body. As shown clearly in FIG. 6 (b), the self-curved deforming portion 61a is thicker than that of 64a, and its cross-sectional shape is n-fold rotational asymmetry with respect to the axis C over the entire axial direction (n is an integer other than 1). )have. As described above, the self-curving deformable portion 61a has n-fold rotational asymmetry (n is an integer other than 1) due to the different cross-sectional shapes and cross-sectional areas of the first columnar body 63a and the second columnar body 64a. . The two notches 67a are basically the same as the notch 40p except that the opening widths thereof are different. The bottom portion 62a is a solid body having a conical portion 68 that has a curved shape connecting the first columnar body 63a and the second columnar body 64a and protrudes sharply toward the self-curving deformable portion 61a. Is basically the same as the bottom 22.

  The self-curvature deforming portion 61a has an n-fold rotational asymmetry (n is a thickness near the first columnar body 63a having a large thickness becomes the strong resistance portion 25a and a portion near the second columnar body 64a having a small thickness is the weak resistance portion 25b. (Integer other than 1). The self-curvature deforming portion 61a has a lumen 66a and a cutout portion 67a, and the head portion 21 has a solid cylindrical shape. Therefore, when pressure in the direction of the axis C acts on the valve body 7A, the valve body is curved in one radial direction, that is, on the weak resistance portion 25b side, basically in the same manner as the valve body 5A.

  As shown in FIG. 6C, the valve body 7B, which is still another example of the connector valve body according to the present invention, is basically the same as the valve body 7A except that the bottom 62b is different. Since the self-curvature deforming portion 61a is the same as that of the valve body 7A, when the pressure in the direction of the axis C acts on the valve body 7B, the valve body 7B is bent in one radial direction like the valve body 7A. The valve body 7B controls the flow of fluid that is housed in the connector pipe 4 of the connector according to the present invention and flows through the connector pipe 4. A description of the same configuration as that of the valve body 7A is omitted, and the same reference numerals are given in FIG.

  As shown in FIG. 6C, the bottom 62b is basically the same as the bottom 62a except that the outer peripheral surface of the bottom 62b has a dome-shaped supported portion 69. The supported portion 69 supports the valve body 7B by placing the valve body 7B on the support portion 17 of the valve body storage portion 16.

  The valve body 8 which is another example of the connector valve body according to the present invention is basically the same as the valve body 5A except that the body 71 is different as shown in FIG. That is, the valve body 5A has one self-curvature deforming portion 23a, but the valve body 8 has two self-curvature deforming portions 23a. Specifically, the valve body 8 includes a head portion 21, a body portion 71 having two self-curvature deforming portions 23 a arranged in series via a solid connection portion 72, and a bottom portion 22. Yes. The valve body 8 is housed in the connector pipe 4 of the connector according to the present invention and controls the flow of fluid flowing through the connector pipe 4. The description of the same configuration as the valve body 5A is omitted, and the same reference numerals are given in FIG. The body portion 71 includes a first self-curvature deforming portion 23a, a solid connecting portion 72, and a second self-curvature deformable portion 23a that are sequentially connected from the head portion 21 toward the bottom portion 22. Specifically, the deformable portions 23a are arranged so that the weak resistance portions 25b are located on the right side in FIG. Therefore, the valve body 8 is basically bent in the same radial direction as the valve body 5A. In this invention, it suffices to have at least one self-curving deformable portion, and three or more self-curving deformable portions are continuous in the axial direction of the connector valve body according to the present invention so as not to cancel each other's curving directions. Or may be arranged in series at intervals.

  The valve body according to the present invention is not limited to the above-described example, and various modifications can be made within a range in which the object of the present invention can be achieved. For example, the above-described various heads, self-curvature deforming parts (trunk parts), and bottom parts can be appropriately combined. Further, the connector valve bodies 5A to 5Q, 6A to 6C, 7A and 7B, and 8 all have top surfaces 21a and 54 that are flat surfaces or curved surfaces. When contamination of the top surface or the like is not considered important, such as when used for applications where only injection is performed, the top surface may have grooves or slits that extend in the radial direction and guide the fluid.

  Further, the connector valve bodies 5A to 5Q, 6A to 6C, 7A and 7B and 8 are all of the outer diameter of the self-curvature deforming portion and the body portion, for example, the columnar body in a cross section perpendicular to the axis of the connector valve body. The outer diameter of the virtual circumscribed circle circumscribing the cross-sectional shape is the same as the outer diameter of the head or the plug body and the bottom.In this invention, the outer diameter of the self-curved deformable portion and the trunk is the same as that of the head or the bottom. It may be smaller or larger than the outer diameter.

  The connector according to the present invention is suitably used as a connector for connecting at least two pipes, for example, the medical connector, particularly a medical connector for connecting the tube and a needleless pipe, that is, a mixed injection pipe or the like. . The connector according to the present invention includes a connector pipe and the connector valve body according to the present invention. As described above, in the connector valve body according to the present invention, the plug portion has the first connection port. The self-curvature deforming portion is bent in one radial direction by the pressure acting in the axial direction of the connector valve body, and the lumen of the tube body and the flow path are communicated with each other in a first posture to be sealed (also referred to as a sealed state). Transition to the second posture (also referred to as an open state) is possible. When the connector valve body according to the present invention is in the first posture, the peripheral side surface of the head portion or the plug portion is in close contact with the inner surface of the first connection port, thereby sealing the connection port in a liquid-tight manner. On the other hand, when the connector valve body according to the present invention is curved as described above, the first posture is shifted to the second posture, the top surface of the head is inclined, and the flow of the lumen of the tube and the connector tube is changed. The passage communicates with the valve body accommodating portion or the first connection port, and fluid is supplied from the lumen of the tube body into the connector tube. When the pipe body is pulled out or retracted from the first connection port after the supply of the fluid is completed, the pressure applied to the connector valve body according to the present invention is released and the original repulsive force or restoring force is restored to the original. Returning to the state, that is, shifting from the second posture to the first posture, the first connection port is sealed in a liquid-tight manner. Thus, the connector according to the present invention exhibits excellent injectability and sealability.

  As shown in FIG. 8A, the connector 1 as an example of the connector according to the present invention is connected to a first connection port 12 to which a needleless tube 81 can be connected, a catheter placed in a patient, and the like. In addition, a second connection port 13 to which a tube body (not shown) is connected, a third connection port 14 to which a tube body (not shown) connected to a bag or the like storing a fluid to be administered to a patient is connected, these A connector pipe 4 having a valve body housing portion 16 disposed so as to be adjacent to the connection port 12 along the axis of the first connection port 12; A connector valve body 5A built in the valve body storage portion 16 or the flow path 15 of the connector pipe 4 is provided.

  As long as the connector body 4 can incorporate the valve body 5A, a conventionally known connector pipe can be used without limitation, and for example, as shown in FIG. A connector tube having a substantially T shape in plan view, a connector tube having a substantially cross shape in plan view, and the like can be given. The connector tube 4 has a first connection port 12 to which a needleless tube 81 is connected at one end in the axial direction thereof, and a second tube to which a tube connected to a catheter or the like is connected at the other end. A connection port 13 is disposed, and a third connection port 14 that protrudes in a direction intersecting the axial direction and is connected to a tubular body connected to a bag or the like that stores fluid is disposed. And the valve body accommodating part 16 which can accommodate the valve body 5A is arrange | positioned along the axial direction between the 1st connection port 12 and the 2nd connection port 13, and the valve body accommodating part 16 is the largest. It has a hollow structure with a diameter, the first connection port 12 has a tube structure with a diameter smaller than that of the valve body storage portion 16, and the second connection port 13 and the third connection port 14 have the smallest diameter. It has a tube structure. Each connection port 12 to 14 of the connector pipe 4 is formed with a structure that can be connected to a needleless tube described later or a structure that can temporarily hold the connection, for example, a luer lock screw or the like.

  The valve body storage portion 16 of the connector pipe 4 has a hollow cylindrical shape having a tapered pointed portion on the second connecting portion 13 side, and extends radially from the inner surface of the pointed portion at intervals. The support part 17 which consists of a some protrusion is arrange | positioned. The support portion 17 is mounted with the bottom portion 22 of the valve body 5 </ b> A to support the valve body 5 </ b> A and allows fluid to flow from the gap formed between the bottom portion 22 to the second connection port 13.

  The needleless tube 81 connected to the connector 1 is not particularly limited as long as it has a lumen 81a, that is, a flow path through which a fluid flows, and includes the various tubes described above. As shown in FIG. 8A, the distal end portion 82 of this tubular body has a shape that can be connected to the first connection port 12, and is usually slightly smaller than the inner diameter of the first connection port 12. It has a small-diameter annular structure having an outer diameter. The outer peripheral surface of the tip 82 may have a luer groove that engages with a luer lock formed in the first connection port 12 as desired.

  The connector tube 4 and the needleless tube 81 are usually formed of a rigid material, for example, various resins, various glasses, various ceramics, and various metals. Examples of the resin include polyolefins such as polyethylene, polypropylene, 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 coalesce, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT), polyether, polyether ketone (PEK), polyester Teretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyfluoride And vinylidene chloride, fluorine-based resins, blends containing one or more of these resins, and polymer alloys.

  As shown in FIG. 8A, the connector 1 is accommodated in the valve body accommodating portion 16 when the needleless tubular body 81 is not connected to the first connection port 12, that is, in a sealed state. The valve body 5A has a first posture extending in the direction of the axis C, and the head 21, that is, the entire peripheral side surface of the plug portion is in close contact with the inner surface of the first connection port 12, and the head 21 is in the first position. The connection port 12 is liquid-tightly sealed, that is, sealed. Since the valve body 5A seals the first connection port 12 in this way, the blood of the patient that has passed through the third connection port 13 or the fluid injected from the second connection port 14 is the first connection port. This valve element 5A also functions as a check valve, a hemostatic valve, and the like. When the head 21 seals the first connection port 12, the flat top surface 21 a of the head 21 is exposed from the first connection port 12, so that it can be easily cleaned. Further, the valve body 5 </ b> A housed in the valve body housing portion 16 forms an annular flow passage on the outer periphery of the valve body housing portion 16 along with the inner surface of the valve body housing portion 16. Therefore, the inner diameter of the valve body storage portion 16 is set to be larger than the outer diameter of the valve body 5A, particularly the self-curvature deforming portion 23a.

  In order to supply a fluid to the patient via the connector 1, as shown in FIG. 8B, the distal end portion 82 of the tube body 81 is connected to the first connection port 12 against the elastic force of the valve body 5A. Press fit. Then, since the valve body 5A has the self-curvature deforming portion 23a that bends in a specific direction, the valve body 5A acts in the axis C direction of the valve body 5A by the needleless tubular body 81 connected to the first connection port 12. Due to the pressing force, the self-curvature deforming portion 23a is curved in a specific radial direction centering on the direction of the axis C, and the valve body 5A itself is also curved in the same direction, thereby sealing the first connection port 12. The head 21 is buried in the valve body storage portion 16 so as to be inclined. On the other hand, the distal end surface 83 of the needleless tubular body 81 press-fitted into the first connection port 12 along the axis C is perpendicular to the axis C. Since the valve body 5A curved in this manner is inclined with respect to the head 21, the top surface 21a is also inclined with respect to the axis C, and the tip surface 83 is perpendicular to the axis C. A space 84 is formed between the surface 83 and the fluid is injected from the needleless tube 81 into the connector tube 4 via the space 84. Thus, when the distal end portion 82 of the tube 81 is press-fitted into the first connection port 12, the connector 1, that is, the first connection port 12, in which the lumen 81a of the needleless tube 81 and the flow path 15 communicate with each other, is opened. It becomes the 2nd posture. The injected fluid flows through the annular flow passage formed on the outer periphery of the valve body 5 </ b> A and flows into the second connection port 13. At this time, the valve body 5 </ b> A is positively curved by itself without cooperating with other members such as the inner surface of the valve body storage portion 16.

  When the needleless tubular body 81 is removed from the first connection port 12 after injecting a desired fluid in this way, the pressing force applied by the needleless tubular body 81 is released, and the valve body 5A becomes its own. The first posture is restored by the repulsive force or the restoring force, and the outer peripheral surface of the head 21 seals the first connection port 12 in a liquid-tight manner. In this way, the connector 1 including the valve body 5A is bent in a specific direction by the pressure applied by the valve body 5A and is released when the pressure is released even if the fluid is injected multiple times. Since returning to the posture, the bending and restoration of the valve body 5A, that is, the transition between the first posture and the second posture is repeated with good reproducibility every time. Therefore, the connector 1 is excellent in bendability and sealability.

  In addition, although the structure and effect | action were demonstrated about the connector 1 provided with 5 A of valve bodies, it is the same also with the connector provided with valve bodies 5B-5Q, 6A-6C, 7A and 7B, and 8 instead of the valve body 5A. To work.

  The connector according to the present invention is not limited to the above-described example, and various modifications can be made as long as the object of the present invention can be achieved.

1 Connector 4 Connector pipe 5A-5Q, 6A-6C, 7A, 7B, 8 Valve body for connector (valve body)
12 1st connection port 13 2nd connection port 14 3rd connection port 15 Flow path 16 Valve body accommodating part 17 Support part 21, 51a, 51b Head part 21a, 54 Top surface 22, 56, 62a, 62b Bottom part 23a ˜23p, 61a, 61b Self-curvature deforming portion 24a, 71 Trunk portion 25a Strong resistance portion 25b Weak resistance portion 26a-26k, 66a Lumen 30p Columnar bodies 31a-31p, 63a First columnar bodies 32a-32q, 64a, 64b Second columnar bodies 40a to 40d, 40h, 40n, 40o, 40p, 67a Notches 41e to 41g, 41i to 41l, 41p First notches 42e to 42g, 42i to 42l, 42p Second notches 43f, 43i, 43j Third cutout portion 52 Plug portion 53 Swelling portion 57, 68 Conical portion 65a, 65b Connection portion 69 Supported portion 72 Solid connection portion 81 Needleless tubular body 81a Lumen 82 distal end 83 distal end face 84 space

Claims (27)

At least two connection ports connectable to the tube body, a flow path communicating these connection ports, and a valve body storage portion arranged adjacent to the connection port along the axis of the first connection port A connector valve body that is housed in a connector pipe and that controls the flow of fluid,
A head having a plug portion for sealing the first connection port;
A solid bottom portion disposed on a downstream extension line of the head in the axial direction of the connector valve body, and abutting and supporting the valve body storage portion;
A connector valve body including a self-curving deformable portion that is arranged along the axial direction between the head and the bottom and curves in one radial direction by pressure acting in the axial direction.   2. The connector valve according to claim 1, wherein the self-curving deformable portion has an n-fold rotational asymmetry (n is an integer other than 1) in a cross-sectional shape perpendicular to the axis of the connector valve body. body.   3. The connector valve body according to claim 1, wherein the self-curving deformable portion includes a strong resistance portion and a weak resistance portion against the pressure acting in the axial direction.   4. The connector valve body according to claim 1, wherein the self-curving deformable portion has a lumen extending along an axis of the connector valve body. 5.   5. The connector valve body according to claim 1, wherein the self-curving deformable portion includes at least one columnar body that extends in the axial direction and is curved by the pressure.   The connector valve body according to claim 5, wherein the self-curving deformable portion includes at least one of the columnar bodies arranged along a circumferential direction so as to surround the axis of the connector valve body.   The connector valve body according to claim 5, wherein the self-curving deformable portion has a plurality of the columnar bodies arranged so as to sandwich the axis of the connector valve body.   The n-fold rotational asymmetry (n is an integer other than 1) is a group consisting of an arrangement position of the columnar body, a sectional shape perpendicular to the axis of the connector valve body in the columnar body, and a sectional area of the sectional shape. The connector valve body according to claim 5 or 6, wherein at least one selected from the two is different.   The connector valve body according to claim 8, wherein the arrangement position includes an interval between adjacent columnar bodies and a directionality of the cross-sectional shape.   The n-fold rotational asymmetry (n is an integer other than 1) is at least one selected from the group consisting of a cross-sectional shape perpendicular to the axis of the connector valve body in the columnar body and a cross-sectional area of the cross-sectional shape. The connector valve body according to claim 7, which is established by being different.   The said cross-sectional area is a valve body for connectors of any one of Claims 8-10 including that at least one of the thickness and the width | variety of the said cross-sectional shape in the said columnar body differs.   The connector valve according to any one of claims 1 to 11, wherein the self-curving deformable portion has at least one through hole or notch that opens in a direction intersecting the axis of the self-curving deformable portion. body.   The at least one of the through hole or the notch is open to the outer peripheral surface near the bottom or the outer peripheral surface of the bottom, and communicates the lumen with the outside of the connector valve body. Valve body for connectors.   14. The connector valve body according to claim 12, wherein at least one of the through hole or the notch extends to the vicinity of the bottom along the axis of the self-curving deformable portion.   6. The connector valve body according to claim 5, wherein the self-curving deformable portion has one columnar body having an axis different from the axis of the connector valve.   The connector valve according to any one of claims 1 to 15, wherein a plurality of the self-curving deformable portions are arranged in series in the axial direction of the connector valve body so as not to cancel each other's bending directions. body.   The valve body for a connector according to any one of claims 1 to 16, wherein an outer diameter of the self-curving deformable portion is the same as an outer diameter of the bottom portion.   The head portion includes the plug portion, and a bulging portion that is disposed between the plug portion and the self-curving deformable portion and projects in a radial direction from the plug portion. The connector valve body according to any one of the preceding claims.   19. The connector valve body according to claim 1, wherein the plug portion is a surface having a flat top surface exposed to the first connection port or a curved surface bulging outward.   The connector valve body according to any one of claims 1 to 19, wherein the head portion has a shape that is not curved in one radial direction by a pressure acting in an axial direction thereof.   21. The connector valve body according to claim 20, wherein the shape has a flat outer peripheral surface that does not have a groove or a recess extending in the circumferential direction.   The valve body for a connector according to any one of claims 1 to 21, wherein the bottom portion has a cone-shaped portion or a frustum-shaped portion that gradually tapers toward the self-curving deformable portion.   The connector valve body according to any one of claims 1 to 22, wherein the connector valve body is made of an elastic material.   The connector valve body according to any one of claims 1 to 23, wherein the connector valve body forms an annular flow passage on the outer periphery of the connector valve body through which a fluid flows together with the inner surface of the valve body housing portion. body.   The said connector is a mixed injection pipe | tube, The valve body for connectors of any one of Claims 1-24. At least two connection ports connectable to the tube body, a flow path communicating these connection ports, and a valve body storage portion arranged adjacent to the connection port along the axis of the first connection port Having a connector tube;
The connector valve body according to any one of claims 1 to 25, which is housed in the valve body housing portion in a state of being abutted and supported by a support portion of the valve body housing portion,
The connector valve body has a first posture in which the plug portion seals the first connection port, and the self-curving deformable portion is curved in one radial direction by a pressure acting in an axial direction thereof. A connector capable of shifting to a second posture in which a lumen communicates with the flow path.   27. The connector according to claim 26, wherein the self-curvature deforming portion is bent without being in contact with the valve body storage portion and shifts from the first posture to the second posture.

Images