JP2013059390A - Connector valve element and connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector 1 combining a sealing property, injection easiness, and good hygiene, and a connector valve element 5 for use in the connector 1.SOLUTION: The connector valve element 7 includes: a cylindrical hollow head 21 having an outer peripheral surface 32 being in close contact with a connecting port 12, and a flat top surface 36 exposed from the connecting port 12; a body 23 disposed on the opposite side of the top surface 36 and having three through-holes 52-54; and a head support part 22 having a second seal 41 disposed between the cylindrical hollow head 21 and the body 23. The connector 1 includes a connector tube 5 having three connecting ports 12-14, and an internal space 15 linking the connecting ports 12-14, and a connector body 7. The connector can change over between: a first attitude in which the outer peripheral surface 32 seals the inner peripheral surface of the connecting port 12 and the second seal section 41 comes into pressure contact with an inner peripheral step 19; and a second attitude in which the connector contracts in the direction of an axis C by pressure acting in the direction of the axis C, thereby allowing an inner cavity 81a of a tube body 81 to communicate with the internal space 15.

Description

  The present invention relates to a valve body for a connector and a connector, and more particularly, to a connector and a connector that are excellent in hygiene in the vicinity of a connection port and can be easily injected with fluid even though the connection port can be sealed with high sealing performance. This relates to a connector valve element that contributes to the combination of performance, ease of injection and hygiene.

  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. Specifically, an infusion tube, a connector used when intravenously administering to a patient a second fluid of a different type or concentration from the first fluid connected to one tube body, specifically Is a mixed injection tube.

  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.

  Various types of such medical connectors are known, and one of them is, for example, a medical connector that opens and closes a connection port by moving a seal portion that closes the connection port back and forth in the axial direction. It is done. Examples of such a type of medical connector include a “connector” in Patent Document 1 and a “needleless connection port” in Patent Document 2.

  The “connector” of Patent Document 1 is “a connector body having a connection port for connecting a pipe body, a fluid passage, a valve body, and the valve body that is moved relative to the connector body in the axial direction of the connector body. A support portion for supporting the valve body; and an urging means for urging the valve body toward the connection port side. The connection port is configured to open and close by the movement of the valve body. (Claim 5 etc.). In this “connector”, “the biasing means is constituted by a spiral spring, a bellows spring or a step spring” (Claim 7 and the like), and “the tip surface of the pipe body of the valve body is A concave portion and / or a convex portion are formed on the contact side ”(Claim 11 or the like).“ The valve body 5 includes a substantially cylindrical base portion 52 and one axial end side of the base portion 52 ( It is composed of a pressed portion 51 provided on the base end side ”(0060 column, FIG. 1 and FIG. 2 and the like).

  In addition, the “needleless connection port” of Patent Document 2 includes, roughly, “a valve housing having an inlet, an outlet, and an inner space, and an elastic piston having a solid upper portion, a neck portion, and an intermediate portion, and the neck portion is an inner space. No-needle connection port that presses against the upper shoulder and the intermediate portion presses against the lower shoulder of the internal space to block the flow between the inlet and the outlet ”(Claim 1, FIG. 1, etc.). In this “needleless connection port”, it is described that “the upper portion 42 of the piston 24 has an inclined surface 40 that defines a fluid space between the piston 24 and the peripheral end portion of the medical device”. (0021 column, 0026 column, FIGS. 1 to 3 etc.).

Another type of connector or valve body includes, for example, a medical connector that opens and closes a connection port by causing a seal portion that closes the connection port to move forward and backward in the axial direction and tilting. As such a medical connector, for example, a “connector” of Patent Document 3 is cited.

  The “connector” of Patent Document 3 is roughly described as “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 a housing. And a valve element that is deformed to a second posture deviated from the axis of the first line ”(claim 1, ninth column, line 19 to line 34, FIG. 12, etc.).

  In such a medical connector, the connection port is easy to clean and highly hygienic in order to prevent the invasion of bacteria such as bacteria and infection, etc. while ensuring the tightness of sealing the connection port in a liquid-tight manner. It is important to be.

  Moreover, in order to prevent infection of an infectious disease, the medical connector may be disposable after administration of the first fluid. However, the second connector may be provided via one connector until the administration of the first fluid is completed. The fluid may be injected multiple times, and multiple types of fluids may need to be injected. Furthermore, in recent years, infection countermeasures for infectious diseases have been taken, and fluid may be injected many times over, for example, several days using one connector. Therefore, the valve body for the connector built in the connector has the same posture every time so that the fluid can be easily injected even in the case of multiple injections of fluid as well as the sealing property of sealing the connection port in a liquid-tight manner. A characteristic of moving forward and backward or deforming is required.

JP 2001-170188 A US Patent Application Publication No. 2009/0105666 US Pat. No. 5,782,816

  In a medical connector in which the valve body expands and contracts in the axial direction, such as the “connector” of Patent Document 1 and the “needleless connection port” of Patent Document 2, the valve body is generally excellent in the expansion and contraction uniformity. Is easy to inject fluid from the top to the connector or needle-free connection port, while the top surface of the valve body protrudes to form a gap for fluid to flow between the top surface and the tip of the tube body. Since the portion or the recess is provided, it is difficult to clean the top surface of the valve body, that is, the vicinity of the connection port of the medical connector, and propagation of bacteria and the like cannot be sufficiently suppressed, resulting in a problem in hygiene.

  On the other hand, in the medical connector of the type in which the valve body as in Patent Document 3 is inclined with respect to the axis thereof, the top surface of the valve body is generally flat, so that cleanability is excellent. No. 3 “valve element 90” has a deformed posture or a deformed state that varies depending on the magnitude and direction of pressure from a tube without an injection needle. And inability to restore fluid may be poor.

  As described above, in the conventional valve body and the medical connector, even if the sealing performance is maintained in the sealed state, it is often impossible to achieve both the ease of injecting the fluid into the connector and the sanitary aspect. Was desired.

  Therefore, the present invention provides a connector that is easy to inject fluid and can be excellent in hygiene in the vicinity of the connection port even though the connection port can be sealed with high hermeticity, and the sealability, ease of injection, and hygiene of the connector It aims at providing the valve body for connectors which contributes to the combined use.

  The inventors of the present invention have studied the structure and deformation state of the connector valve body in detail and concretely. In the connector valve body having the head portion, the head support portion, and the trunk portion, the head support portion The second seal part that reinforces the hermeticity of the head is arranged on the tube, and the head is made into a cylindrical hollow body that is easy to clean, and a through hole is formed in the body part so that it expands and contracts along its own axial direction. Then, it discovered that a head, a head support part, and a trunk | drum function integrally and organically with the pressure which acts on the valve body for connectors, and can make sealing performance and expansion-contraction uniformity compatible with a high level.

  The valve body for a connector according to the present invention, which is means for solving the above problems, is provided in the internal space of the connector pipe having at least two connection ports to which the tube body can be connected and an internal space that communicates these connection ports. A connector valve body to be accommodated, having an outer peripheral surface that is in close contact with an inner peripheral surface of the first connection port, and a flat surface that is exposed to the first connection port or bulges outward. A cylindrical hollow head, a barrel disposed on the opposite side of the top surface of the cylindrical hollow head, and extending along an axis of the cylindrical hollow head; the cylindrical hollow head; And a head support portion having a frustum-shaped second seal portion connected to the opposite side of the cylindrical hollow head, and the body portion includes the axis line. And having at least one through hole penetrating in a direction perpendicular to the through hole, the through hole Characterized by expansion and contraction along its axis direction by being compressed in the axial direction.

A preferred example of this connector valve body is:
(1) The cylindrical hollow head has at least one through-hole penetrating in a direction perpendicular to the axis thereof,
(2) The cylindrical hollow head has a two-fold rotational symmetry with respect to its axis,
(3) The cylindrical hollow head is disposed with a solid disc-shaped seal portion having the top surface, and spaced apart in the circumferential direction on the opposite side of the top surface of the disc-shaped seal portion. A plurality of head side walls extending along the space, and the space as the through hole surrounded by the disc-shaped seal portion and the head side wall,
(4) The cylindrical hollow head has a tapered shape toward the outside of the first connection port, and has a peripheral surface surrounding the top surface;
(5) The body portion has two-fold rotational symmetry with respect to the axis of the connector valve body,
(6) A pair of columnar bodies having a sector-shaped vertical cross section are connected to each other at their center ridge lines,
(7) A plurality of the through holes are arranged so that the center exists on the axis of the connector valve body along the extending direction of the body portion,
(8) Of the plurality of through holes, the through holes arranged on the cylindrical hollow head side are smaller in size than other through holes,
(9) The body portion has a recess or a groove on the outer peripheral surface thereof so as to be symmetric with respect to the axis of the connector valve body,
(10) The recess or groove is disposed at least at one place between the two through holes disposed along the extending direction,
(11) The body portion includes a reinforcing portion that connects two pairs of side surfaces of the pair of columnar main bodies facing each other between the two through holes arranged along the axis of the connector valve body. Have at least one place,
(12) The connector valve body has a two-fold rotational symmetry with respect to its axis,
(13) The connector valve body is made of an elastic material,
(14) The connector valve body forms a flow passage through which fluid flows along with the inner surface of the internal space in the outer periphery of the connector valve body and the through hole.

  A connector according to the present invention, which is a second means for solving the above-mentioned problems, includes a connector pipe having at least two connection ports connectable to a pipe body and an internal space communicating these connection ports, and a valve seat. The connector valve body according to any one of claims 1 to 22, wherein the connector valve body is placed and stored in the internal space, and the connector valve body has an outer peripheral surface of the first connection port. The first posture in which the inner peripheral surface is sealed and the second seal portion is pressed against the inner peripheral step adjacent to the first connection port, and contracted in the axial direction by the pressure acting in the axial direction, It is possible to shift to a second posture in which the lumen of the tubular body communicates with the internal space.

A suitable example of this connector is
(1) The connector is an injection pipe provided with the connector pipe having the two connection ports,
(2) The connector is a mixed injection pipe including the connector pipe having at least three connection ports.

  A connector valve body according to the present invention includes a cylindrical hollow head having a flat or bulging top surface and at least one through-hole penetrating in a direction perpendicular to the axis of the cylindrical hollow head. A barrel portion that is extendable in its axial direction, and is arranged between the cylindrical hollow head portion and the barrel portion, and is connected to the opposite side of the top surface of the cylindrical hollow head portion. Since the first connection port can be sealed with high sealing performance, the head, the trunk, and the head support are integrated and organic, respectively. By functioning, it exhibits high stretch uniformity in the axial direction.

  Moreover, since the connector which concerns on this invention is equipped with the valve body for connectors which concerns on this invention, it is easy to clean the top surface exposed to a 1st connection port, and this connection port, and also to a 1st connection port The connector valve body according to the present invention exhibits high uniformity of expansion and contraction in the axial direction by inserting and removing the tube body, that is, by pressing and releasing the pressure on the connector valve body according to the present invention. In the connector according to the present invention, when the pipe body is not connected, the first connection port of the connector pipe is liquid-tightly sealed with the outer peripheral surface of the connector valve body according to the present invention and the second seal portion, When the tubular body is connected, the top surface of the connector valve body according to the present invention is recessed into the hollow interior and the fluid in the tubular body is circulated in the connector between the top surface and the distal end surface of the tubular body. A gap to be formed is formed.

  Therefore, according to the present invention, the connector is excellent in hygiene in the vicinity of the connection port even though the connection port can be sealed with high hermeticity, and the sealing property of the connector, ease of injection, and It is possible to provide a valve body for a connector that contributes to hygiene.

FIG. 1 is a schematic view showing an example of a connector valve body according to the present invention. FIG. 1A is a schematic front view showing an example of a connector valve body according to the present invention. These are the schematic side views which show an example of the valve body for connectors which concerns on this invention, FIG.1 (c) is a schematic bottom view which shows an example of the valve body for connectors which concerns on this invention. FIG. 2 is a schematic view showing an example of a connector valve body according to the present invention, and FIG. 2A is a schematic perspective view when an example of a connector valve body according to the present invention is viewed from above. FIG. 2B is a schematic perspective view of the connector valve body according to the present invention as viewed from below. FIG. 3 is a schematic view showing an example of a connector valve body according to the present invention, and FIG. 3A is a schematic front view showing an example of a connector valve body according to the present invention. FIG. 3 is a schematic cross-sectional view showing the AA cross section in FIG. 3A, and FIGS. 3C to 3F are the CC cross section, DD cross section, and EE cross section in FIG. 3A, respectively. It is a schematic sectional drawing which shows FF and FF cross section. FIG. 4 is a schematic view showing an example of a connector valve body according to the present invention, and FIG. 4A is a schematic side view showing an example of a connector valve body according to the present invention. These are schematic sectional drawings which show the BB cross section in Fig.4 (a). FIG. 5 is a schematic view showing a modification of the connector valve body according to the present invention, and FIG. 5 (a) is a schematic front view showing another example of the connector valve body according to the present invention. (B) is a schematic front view which shows another example of the valve body for connectors which concerns on this invention, FIG.5 (c) is a schematic front view which shows another example of the valve body for connectors which concerns on this invention. FIG. 5D is a schematic front view showing still another example of the connector valve body according to the present invention. 6 is a schematic view showing an example of the connector according to the present invention, FIG. 6 (a) is a schematic right side view showing an example of the connector according to the present invention, and FIG. 6 (b) is related to the present invention. It is a schematic front view which shows an example of a connector. 7 is a schematic cross-sectional view showing an example of a connector according to the present invention, FIG. 7 (a) is a schematic cross-sectional view showing a BB cross section in FIG. 6 (a), and FIG. It is a schematic sectional drawing which shows the AA cross section in 6 (b). FIG. 8 is a schematic explanatory view showing the open state in an example of the connector according to the present invention by extracting the connector valve body according to the present invention and the needleless tube inserted into the first connection port.

  The valve body for a connector according to the present invention is a connector that connects at least two tubes, for example, a medical connector that connects a tube connected to a catheter placed in a patient and an infusion tube, that is, an infusion tube, or the like In particular, a medical connector for connecting the tube and a tube body such as a syringe without an injection needle, such as 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). That is, it is suitably used for a mixed injection tube or the like. 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, the connector 1 which is a preferred example of the connector according to the present invention is shown in FIG. 7, the connector pipe 5 having a substantially Y shape in plan view and the connector valve body 7 built in the connector pipe 5 are provided. The connector tube 5 includes a first connection port 12 to which a not-shown needleless tube body 81 can be connected, a second connection port to which a tube body (not shown) connected to a catheter or the like placed in the patient is connected. 13 and a third connection port 14 connected to a tube (not shown) connected to a bag or the like containing a fluid to be administered to a patient, and an internal space 15 for communicating these connection ports 12 to 14. Have. In the connector pipe 5, as shown in FIG. 7, the internal space 15 includes a flow path 17 that connects these connection ports 12 to 14, and the connection port 12 along the axis C of the first connection port 12. It is arranged between the first connection port 12 and the second connection port 13 so as to be adjacent to each other, and includes a valve body housing portion 16 for housing the connector valve body 7. Therefore, the internal space 15 functions as the valve body storage portion 16 and the flow path 17.

  The connector valve body according to the present invention is stored in the valve body storage portion 16 in a state of being placed and supported on the valve seat 18 of the valve body storage portion 16, that is, in the vicinity of the first connection port 12 in the internal space 15, The flow of the fluid flowing through the connector or the fluid injected into the connector is controlled. The connector valve body housed in the valve body housing portion 16 forms an annular flow passage through which the fluid flows together with the inner surface of the internal space 15 in its outer periphery and through holes 52 to 54 described later. 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.

  The connector valve body according to the present invention has a cylindrical hollow head having an outer peripheral surface that is in close contact with the inner peripheral surface of the first connection port 12 and a flat surface that is exposed at the first connection port 12 or that bulges outward. Disposed on the opposite side of the top surface of the cylindrical hollow head, extending along the axis of the cylindrical hollow head, and disposed between the cylindrical hollow head and the trunk. And a head support portion having a frustum-shaped second seal portion connected to the opposite side of the cylindrical hollow head, and the body portion at least one through-hole penetrating in a direction perpendicular to the axis The through-hole is compressed in the axial direction, and is expanded and contracted along its own axial direction. The connector valve body according to the present invention having such characteristics can contribute to the combination of the connector sealing performance, ease of injection, and hygiene.

  An example of a connector valve body according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4 and FIGS. 6 and 7, the connector valve body 7 as an example includes the cylindrical hollow head 21 and the head support along the axis C of the cylindrical hollow head 21. A section 22, a body section 23, and a leg section 24 are provided, and the cross section perpendicular to the axis C or the outline thereof is substantially circular. The cylindrical hollow head 21 has an outer peripheral surface 32 that is in close contact with the inner peripheral surface of the first connection port 12 and a flat top surface 36 that is exposed to the first connection port 12. The cylindrical hollow head 21 is disposed on the opposite side of the top surface 36 and extends along the axis C of the cylindrical hollow head 21, and the head support portion 22 includes the cylindrical hollow head 21 and the trunk portion 23. And a frustum-shaped second seal portion 41 connected to the opposite side of the cylindrical hollow head portion 21, and the leg portion 24 is an end of the trunk portion 23 in the extending direction C. These are two legs that are arranged in the circumferential direction with a space therebetween and extend in the extending direction C. In this connector valve body 7, the connector valve body 7, the cylindrical hollow head portion 21, the head support portion 22, the trunk portion 23, and the leg portion 24 have a common axis C. The present direction is parallel to and coincides with this axis C.

  The cylindrical hollow head 21 is a hollow cylinder having an outer peripheral surface 32 that is in close contact with the inner peripheral surface of the first connection port 12 and a flat top surface 36 that is exposed at the first connection port 12. Yes. Here, the hollow may be an internal hollow structure in which a hollow space is defined in a closed state inside the cylindrical hollow head 21, for example, the cylindrical hollow head 21 like the connector valve body 7. A notch hollow structure in which a through-hole or a void portion penetrating the hole is formed may be used. When the cylindrical hollow head 21 is configured to be hollow in this manner, the outer peripheral surface 32 is in close contact with the inner peripheral surface of the first connection port 12 and, for example, as shown in FIG. The hole 35 is bent and deformed so that the top surface 36 is depressed, and the entire cylindrical hollow head 21 expands in the direction perpendicular to the axis C and compressively deforms in the axis C direction. The outer diameter of the cylindrical hollow head 21 may be constant or gradually decreased or increased in the direction of the axis C. In this example, the outer diameter gradually increases toward the top surface 36 so as to be in close contact with the first connection port 12. It has an increasing inverted frustoconical shape, and its outer peripheral surface 32 can also be referred to as an annular sealing surface.

  This cylindrical hollow head 21 improves the expansion / contraction uniformity in the direction of the axis C of the valve body 7 for the connector, and is compatible with the ease of injection and sealing of the connector at a high level. It preferably has rotational symmetry. That is, it is preferable that the cylindrical hollow head 21 matches the shape before the rotation only when the cylindrical hollow head 21 is rotated by 180 °, that is, 0.5 rotation around the axis C. Furthermore, the cylindrical hollow head 21 is plane-symmetric with respect to a plane including the axis C. Here, “symmetry” and “symmetry” include not only geometrically accurate symmetry and symmetry, but also substantial symmetry and symmetry within the scope of the present invention.

  In the connector valve body 7, the cylindrical hollow head portion 21 having two-fold rotational symmetry is hollow by having one through hole 35 penetrating in a direction perpendicular to the axis. . More specifically, the cylindrical hollow head 21 includes a solid disc-shaped seal portion 31 having a top surface 36 and a space in the circumferential direction on the side opposite to the top surface 36 in the disc-shaped seal portion 31. Two head side walls 33 that are arranged and extend along the axis C of the cylindrical hollow head portion 21, a bottom portion 34 on which the head side wall 33 is erected, a disc-shaped seal portion 31, a head side wall 33, and And a space as a through hole 35 surrounded by the bottom 34. When the cylindrical hollow head portion 21 is formed in this way, the disk-shaped seal portion 31 is easily deformed by being depressed in the direction of the body portion 23 to be described later, that is, in the through-hole 35 by expanding and contracting in the axis C direction. Ease of fluid injection is enhanced. The shape of the through-hole 35 is not particularly limited, but the shape of the bottom surface of the disc-shaped seal portion 31 is flat or the shape of the through-hole 35 is that the disc-shaped seal portion 31 is easily depressed and deformed in the through-hole 35. In a cross-sectional shape perpendicular to the penetrating direction, it is preferable that the line in contact with the disc-shaped seal portion 31 is a straight line, or the disc-shaped seal portion 31 in the vicinity of the axis C is thin. As such a shape, for example, the cross-sectional shape is a rectangle, an inverted triangle, an inverted pentagon, etc. shown in FIG. 1, or a concave rectangle shown in FIG. Examples thereof include polygons such as saddle-shaped squares and pentagons, circles, and ellipses. The connector valve body 7 has a rectangular shape in which the bottom surface of the disc-shaped seal portion 31 is arranged to be a flat surface. The through-hole 35 has a cross section gradually from both sides of the penetration direction toward a plane perpendicular to the penetration direction and including the axis C, specifically, a plane corresponding to the line BB shown in FIG. The smaller is that the fluid that has entered the through-hole 35 easily flows out to the outside due to its own weight, and that it is easy to design the PL surface (divided surface) in mold molding and excellent in mold release. ,preferable.

  The thickness of the disc-shaped seal portion 31 at this time is not particularly limited. However, for example, a thickness of 0.5 to 2 mm can be quickly deformed and restored to ensure sealing and easy injection.

  In the cylindrical hollow head 21, the disc-shaped seal portion 31 has a top surface 36 and a peripheral surface 37 that forms a taper toward the outside of the first connection port 12 and surrounds the top surface 36. . That is, the disc-shaped seal portion 31 has a flat truncated cone shape, and the peripheral surface thereof is a peripheral surface 37 and the flat front end surface is a top surface 36. When the disk-shaped seal portion 31 has the top surface 36 and the peripheral surface 37 as described above, the outer diameter of the distal end portion 82 of the needleless tubular body 81 inserted into and removed from the first connection port 12 is the top surface. The fluid in the needleless tubular body 81 can be easily injected into the connector regardless of whether the outer diameter is larger or smaller than 36, or the amount of deformation of the disk-shaped seal portion 31 is small.

  The head support portion 22 is connected to the side opposite to the top surface 36 of the cylindrical hollow head portion 21 (also referred to as a downstream side in the direction of the axis C in this example), that is, connected to the bottom portion 34 of the cylindrical hollow head portion 21. It is arranged between the hollow head 21 and the body 23. The head support portion 22 includes a frustum-shaped second seal portion 41 connected to the bottom portion 34, and supports the cylindrical hollow head 21. Therefore, the second seal portion 41 is preferably a solid body and can also be referred to as a first support portion. The second seal portion 41 has a flat frustum shape with a short axis C length, and the dimension thereof is the inner peripheral step 19 on the first connection portion 12 side in the internal space 15 when housed in the connector pipe 5. Further, the outer peripheral surface of the second seal portion 41 is set so as to be in close contact or pressure contact.

  Specifically, the head support portion 22 has a second seal portion 41, an inverted frustum-shaped second support portion 42, and an R-shaped curved outer peripheral surface along the downstream side in the direction of the axis C. 3 support portions 43 and a flat cylindrical fourth support portion 44 are connected. The second support part 42, the third support part 43, and the fourth support part 44 are all solid, and their connecting parts have the same outer diameter and the fourth support part 44 has the largest outer diameter. It is a diameter. As described above, when the head support portion 22 has at least the solid second seal portion 41, the sealing of the first connection port 12 by the cylindrical hollow head 21 can be reinforced, and the cylindrical hollow head The pressure acting on the portion 21 can be transmitted to the trunk portion 23 without greatly losing the pressure, thereby contributing to high stretch uniformity of the cylindrical hollow head portion 21 and the trunk portion 23.

  The trunk portion 23 is connected to the fourth support portion 44 of the head support portion 22 and is disposed on the opposite side of the top surface 36 of the cylindrical hollow head portion 21, that is, on the downstream side of the head support portion 22 in the direction of the axis C. Has been. The body 23 extends downstream along the axis C of the cylindrical hollow head 21. Regardless of its specific shape and dimensions, the body 23 has a two-fold rotational symmetry with respect to the axis C of the cylindrical hollow head 21 to achieve high stretch uniformity in the axis C direction. It is preferable in that it can be performed.

  The basic skeleton of the body portion 23 has two-fold rotational symmetry, and specifically, as shown clearly in FIGS. 1C and 3D to 3F, the extending direction C A pair of columnar bodies 51a and 51b having a sectoral vertical cross section are connected to each other by a central ridge line 51c. This shape can also be referred to as a circle having V-shaped notches or grooves facing each other in a vertical section as shown in FIG. The trunk portion 23 having such a basic skeleton contracts along the axis C direction without substantially bending or tilting with respect to the axis C direction. Although the dimension of this trunk | drum 23 is set suitably, for example, it is preferable to have an outer diameter which contacts the inner surface of the internal space 15 when contracted in the direction of the axis C. Here, the outer diameter refers to the diameter of a circumscribed circle that circumscribes the body 23 when it has a pair of columnar bodies 51a and 51b. When the trunk | drum 23 has such an outer diameter, the curvature at the time of contraction of the valve body 7 for connectors can be prevented effectively, and the high expansion-contraction uniformity in the axis C direction can be achieved.

  The body portion 23 includes three through holes penetrating in a direction perpendicular to the axis C of the cylindrical hollow head 21, that is, a first through hole 52 and a second through hole arranged along the downstream side in the axis C direction. The through hole 53 and the third through hole 54 are provided, and the two-fold rotational symmetry of the body portion 23 is maintained. By compressing at least one of these through holes 52, 53, and 54 in the direction of the axis C, the body portion 23 expands and contracts uniformly along its own axis C direction. These three through holes 52 to 54 are arranged so that the center thereof exists on the axis C along the extending direction C of the body portion 23 and the axes are substantially parallel to each other. When the three through holes 52 to 54 are arranged in this way, the expansion and contraction in the direction of the axis C is accelerated, and the expansion and contraction uniformity is further improved. The first through hole 52 disposed on the cylindrical hollow head 21 side has a smaller size than the second through hole 53 and the third through hole 54, and the second through hole 53 and the third through hole are provided. The holes 54 have the same dimensions, eg diameter. When the first through hole 52 is smaller than the other through holes 74 and 75 as described above, the pressure is such that the second through hole 53 and the third through hole 54 having large dimensions act in the axis C direction. By preferentially compressing the cylindrical hollow head 21 without substantially bending or tilting the cylindrical hollow head 21 with respect to the axial direction, the connector valve body 7 is highly uniform along the axial C direction. It expands and contracts with.

  Each of the through holes 52 to 54 gradually increases from both sides of the penetration direction toward a plane perpendicular to the penetration direction and including the axis C, specifically, a plane corresponding to the line BB shown in FIG. The cross-sectional shape is reduced because the fluid that has entered the through holes 52 to 54 flows out of the through hole easily due to its own weight, and the ease of designing the PL surface (divided surface) in mold molding and the mold release. It is preferable at the point which is excellent in property.

  The barrel portion 23 is symmetric with respect to the extending direction of the barrel portion 23 in that the overall elasticity is increased and the barrel portion 23 contracts and stretches or restores more quickly and uniformly in the direction of the axis C. It is preferable that the outer peripheral surface has a recess or groove 56 so as to be rotationally symmetric. A total of four recesses or grooves 56 are arranged between two through holes 52 to 54 arranged adjacent to each other along the extending direction of the body portion 23. When the concave portion or the groove 56 is arranged in this way, the compression deformation, that is, the diameter expansion deformation of the body portion 23 in which the through holes 52 to 54 are disposed can be promoted, and the stretchability of the body portion 23 can be enhanced. These recesses or grooves 56 are set to have an appropriate shape and size, and in this example, all of them have the same size, and have a substantially arc shape when viewed from the front so that the pressure in the direction of the axis C acts uniformly. It has become. Each of the recesses or grooves 56 gradually from both sides of the penetration direction toward a plane perpendicular to the penetration direction and including the axis C, specifically, a plane corresponding to the line BB shown in FIG. The smaller the cross-sectional shape is, the point that the fluid adhering to the recess or groove 56 easily falls to the outside due to its own weight, and the ease of designing the PL surface (partition surface) and mold release in mold molding. It is preferable at the point which is excellent in.

  The body portion 23 includes reinforcing portions 55a, 55b, and 55c that connect two pairs of side surfaces of the pair of columnar bodies 51a and 51b that face each other, between the first through hole 52 and the second through hole 53, It is provided between the second through hole 53 and the third through hole 54 and between the third through hole 54 and the leg portion 24. All of the reinforcing portions 55a, 55b, and 55c have a sector shape having a radius smaller than the radius of the columnar bodies 51a and 51b. Thus, if the reinforcement parts 55a and 76b are arrange | positioned and formed between the through-holes 52-54 in the trunk | drum 23, the columnar main bodies 51a and 51b will be connected firmly and the trunk | drum 23 will be made with respect to the axis C direction. The film can be contracted along the direction of the axis C without substantially bending or tilting. In particular, the reinforcing portions 55a, 55b, and 55c are excellent in this effect when they are fan-shaped connected to the side surfaces of the columnar bodies 51a and 51b. Of the reinforcing portions 55 a to 55 c, the reinforcing portion 55 b disposed between the second through hole 53 and the third through hole 54 does not inhibit the compressive deformation of the second through hole 53 and the third through hole 54. Thus, it has a smaller radius than the reinforcing portions 55a and 55c.

  The leg portions 24 are arranged at the end portions in the extending direction C of the body portion 23 at intervals in the circumferential direction, and extend in the extending direction. When the leg portions 24 are thus arranged with a space therebetween, a flow path is formed between the leg portions 24 when the leg portions 24 are housed in the connector pipe 5, and the fluid flows through the second connection port 13. . In this example, the two leg portions 24 are integrally formed with the pair of columnar bodies 51a and 51b, and the inner surfaces are chamfered so as to expand toward the extending direction of the pair of columnar bodies 51a and 51b. ing.

  The connector valve body 7 having the cylindrical hollow head portion 21, the head support portion 22, the trunk portion 23, and the leg portion 24 has two-fold rotational symmetry with respect to the axis C as a whole. In this way, when the connector valve body 7 as a whole has two-fold rotational symmetry, it has a high degree of expansion and contraction in the axis C direction without substantially bending or tilting with respect to the axis C direction. Stretch along.

  And in the valve body 7 for connectors, the cylindrical hollow head 21 involved in sealing, injection ease and hygiene, the body 23 involved in injection ease, and the head support related to sealing and injection ease The connector valve body 7 that functions integrally and organically with the portions 22 and can seal the first connection port 21 with high sealing performance exhibits high stretch uniformity in the axis C direction. The connector in which the valve body 7 is housed can sufficiently contribute to having high sealing performance, ease of injection, and hygiene. In particular, the connector valve body 7 having the peripheral surface 37 can easily inject a fluid even when a needleless tube body 81 having a tip 82 smaller than a specified dimension diameter is inserted into the first connection port 12. Sometimes fluid can be injected into the connector 1 as desired without leaking out of the connector 1.

  The connector valve body 7 is preferably made of an elastic material and has elasticity in that it can exhibit the stretchability and the depression deformation of the cylindrical hollow head 21 efficiently. For example, it is preferable that the connector valve body 7 has elasticity to express 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.

  A modification of the connector valve body according to the present invention will be described with reference to the drawings. The connector valve body 8A as another example of the connector valve body according to the present invention is basically the same as the connector valve body 7 except that the shape of the through hole 39A is different as shown in FIG. It has the same operation and function as the connector valve body 7, and has basically the same effect. That is, the connector valve body 8A includes a cylindrical hollow head portion 26A having one through hole 39A penetrating in a direction perpendicular to the axis C. The through hole 39A has a concave quadrilateral shape (also referred to as an arrow shape) in which one of the four corners has a cross-sectional shape perpendicular to its own axis and faces the disc-shaped seal portion 31A. The thickness of the seal portion 31A is reduced. More specifically, the cylindrical hollow head portion 26A has a solid disc-shaped seal portion 31A having a top surface 36, and is spaced apart from the top surface 36 in the disc-shaped seal portion 31A in the circumferential direction. It is disposed and is surrounded by two head side walls 33A extending along the axis C, a bottom part 34A on which the head side wall 33A is erected, a disc-shaped seal part 31A, a head side wall 33A, and a bottom part 34A. And a space as a through hole 39A. The connector valve body 8A having such a through hole 39A has two-fold rotational symmetry with respect to the axis C.

  As shown in FIG. 5B, the connector valve body 8B as another example of the connector valve body according to the present invention is basically the same as the connector valve body 7 except that the shape of the through hole 39B is different. It is basically the same, has basically the same operations and functions as the connector valve body 7, and has basically the same effects. That is, the connector valve body 8B includes a cylindrical hollow head 26B having one through hole 39B penetrating in a direction perpendicular to the axis C. The through hole 39B has a circular cross-sectional shape perpendicular to its own axis, and the thickness of the disc-shaped seal portion 31B near the axis C is reduced. More specifically, the cylindrical hollow head portion 26B includes a solid disc-shaped seal portion 31B having a top surface 36 and a space in the circumferential direction on the opposite side of the top surface 36 in the disc-shaped seal portion 31B. It is disposed and is surrounded by two head side walls 33B extending along the axis C, a bottom part 34B on which the head side wall 33B is erected, and a disc-shaped seal part 31B, a head side wall 33B, and a bottom part 34B. And a space as a through hole 39B. The connector valve body 8B having such a through hole 39B has two-fold rotational symmetry with respect to the axis C.

  As shown in FIG. 5C, the connector valve body 8C as still another example of the connector valve body according to the present invention is different from the connector valve body 7 except that the shape of the through hole 39C is different. It is basically the same, has basically the same operations and functions as the connector valve body 7, and has basically the same effects. That is, the connector valve body 8C includes a cylindrical hollow head portion 26C having one through hole 39C penetrating in a direction perpendicular to the axis C. This through-hole 39C is a triangle in which a cross section perpendicular to its own axis is formed in an arc shape and one corner is directed to the disc-shaped seal portion 31C, and the thickness of the disc-shaped seal portion 31C in the vicinity of the axis C is reduced. ing. More specifically, the cylindrical hollow head portion 26C has a solid disc-shaped seal portion 31C having a top surface 36, and is spaced apart from the top surface 36 in the disc-shaped seal portion 31C in the circumferential direction. It is disposed and is surrounded by two head side walls 33C extending along the axis C, a bottom part 34C on which the head side wall 33C is erected, and a disc-shaped seal part 31C, a head side wall 33C and a bottom part 34C. And a space as a through hole 39C. The connector valve body 8A having such a through hole 39C has two-fold rotational symmetry with respect to the axis C.

  The connector valve body 8D as another example of the connector valve body according to the present invention is basically the same as the connector valve body 7 except that the shape of the through hole 39D is different as shown in FIG. It is basically the same, has basically the same operations and functions as the connector valve body 7, and has basically the same effects. That is, the connector valve body 8D includes a cylindrical hollow head 26D having one through hole 39D penetrating in a direction perpendicular to the axis C. This through hole 39D has a cross-sectional shape perpendicular to its own axis, which is a rhombus or saddle-shaped quadrangle whose one of four corners faces the disc-shaped seal portion 31D, and the thickness of the disc-shaped seal portion 31D near the axis C. The thickness is thinned. More specifically, the cylindrical hollow head portion 26D includes a solid disc-shaped seal portion 31D having a top surface 36 and a space in the circumferential direction on the opposite side of the top surface 36 in the disc-shaped seal portion 31D. It is disposed and is surrounded by two head side walls 33D extending along the axis C, a bottom part 34D on which the head side wall 33D is erected, a disc-shaped seal part 31D, a head side wall 33D, and a bottom part 34D. And a space as a through hole 39D. The connector valve body 8D having such a through hole 39D has two-fold rotational symmetry with respect to the axis C.

  The connector 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, in the connector valve bodies 7 and 8A to 8D, the cylindrical hollow heads 21 and 26A to 26D become cylindrical hollow bodies having one through hole 35 and 39A to 39D in order to achieve high stretch uniformity. However, in this invention, the cylindrical hollow head may be a hollow body having an internal hollow structure in which a hollow space is defined in a closed state inside the cylindrical hollow head without having a through hole. The cylindrical hollow heads 21, 26A to 26D have one through hole 35, 39A to 39D. In the present invention, the cylindrical hollow head preferably has two-fold rotational symmetry with respect to its axis. As such, it may have two or more through holes. Further, the cylindrical hollow heads 21 and 26A to 26D have two head side walls 33 and 33A to 33D. In the present invention, the cylindrical hollow head preferably has two-fold rotational symmetry with respect to its axis. It may have multiple, preferably even (4 or more) head and side walls. The head side walls 33 and 33A to 33D are erected on the bottoms 34 and 34A to 34D. In this invention, however, the cylindrical hollow head does not have a bottom, and the head side wall is erected directly on the head support. It may be. The cylindrical hollow heads 21, 26A to 26D have a flat top surface 36 and a peripheral surface 37. In this invention, the cylindrical hollow head is a curved surface that bulges outward from the first connection port. It may have a top surface, and may not have a peripheral surface and may be a top surface as a whole. In the cylindrical hollow heads 21, 26 </ b> A to 26 </ b> D, the top surface 36 does not have a flat surface, i.e., a flat surface without protrusions such as protrusions and concave portions such as grooves or grooves. You may have the protrusion or convex line | wire or groove | channel which protrudes toward the outer side of this connection port. If the top surface has such protrusions, etc., the ease of injecting the fluid is increased, and the protrusion is less likely to remain in the vicinity of the top surface after the fluid is injected from the needleless tube 81 into the connector 1. Even if fluid adheres to the top surface due to an increase in the surface area due to the above, the top surface is easy to dry and excellent in hygiene. In the cylindrical hollow heads 21 and 26A to 26D, the through holes 35 and 39A to 39D are gradually reduced in cross section from both sides of the penetration direction toward a plane perpendicular to the penetration direction and including the axis C. In the present invention, the through hole may have a cross section of the same size in the through direction.

  The tubular hollow heads 21 and 26A to 26D of the connector valve bodies 7 and 8A to 8D accommodated in the connector pipe 5 are needleless tube bodies 81 having a tip portion 82 having a predetermined outer diameter formed with a luer lock. When connected to the first connection port 12, the whole is basically compressed and deformed in the direction of the axis C, but has a tip 82 having an outer diameter smaller than a predetermined outer diameter without a luer lock. When the needleless tubular body 81 is manually inserted into the first connection port 12, the needleless tubular body 81 may be deformed into a roughly rhombus (including a parallelogram) so as to be inclined or tilted to some extent with respect to the axis C. The cylindrical hollow heads 21, 26 </ b> A to 26 </ b> D are connected to the normal axis C when a needleless tube 81 having a predetermined outer diameter tip 82 formed with a luer lock is connected to the first connection port 12. However, if the needleless tube 81 is excessively inserted, it may be inclined or inclined to some extent with respect to the axis C.

  In the connector valve bodies 7 and 8A to 8D, the body portion 23 has a pair of columnar bodies 51a and 51b having a fan-shaped vertical section. In this invention, the body portion preferably has two-fold rotational symmetry with respect to its axis. It may have 3 or more, preferably even (4 or more) columnar bodies, and may have one columnar body whose vertical cross section is circular or elliptical. In the connector valve bodies 7, 8A to 8D, the body portion 23 has three through holes 52 to 54. In the present invention, the body portion is preferably one so as to have two-fold rotational symmetry with respect to its axis. Or you may have two or four or more through-holes. Further, these three through holes 52 to 54 are arranged so as to exist on the axis C. In the present invention, a plurality of through holes arranged in a plurality of rows so that the body portion is symmetric with respect to the axis. You may have. Further, in the body portion 23, the through holes 52 to 54 are gradually reduced in cross section from both sides of the through direction toward a plane perpendicular to the through direction and including the axis C. In the present invention, the through holes are formed in the through direction. The cross section may be the same size.

  In the connector valve bodies 7 and 8A to 8D, the body portion 23 has a recess or groove 56 between two adjacently arranged through holes 52 to 54. In this invention, the body portion is preferably its axis. It may be arranged at least at one place instead of all between two through holes arranged adjacent to each other so as to have two-fold rotational symmetry. Moreover, although all the four recessed parts or the grooves 56 have the same dimension, in this invention, the several recessed part or groove | channel may have a different dimension.

  In the connector valve bodies 7, 8 </ b> A to 8 </ b> D, the body portion 23 has reinforcing portions 55 a to 55 c between two adjacent through holes 52 to 54 and between the third through hole 54 and the leg portion 24. However, in the present invention, it may be arranged at least at one place instead of all between the two through holes arranged adjacent to each other, and is not arranged between the through hole on the leg side and the leg part. Also good. The reinforcing portions 55a to 55c are all fan-shaped, but in this invention, the reinforcing portion only needs to be able to connect the side surfaces of a pair of columnar bodies, and may be, for example, a rod-like body or a rectangle. The reinforcing portion 55b has a smaller radius than the reinforcing portions 55a and 55c. However, in the present invention, the reinforcing portion 55b can have the same or different size, for example, a radius as long as the compression deformation of the through hole is not hindered.

  In the connector valve body 7, 8 </ b> A to 8 </ b> D, the head support portion 22 includes a second seal portion 41, a second support portion 42, a third support portion 43, and a fourth support portion 44. In this invention, the head support portion only needs to have at least the second seal portion, and the second support portion, the third support portion, and the fourth support portion can be appropriately arranged as desired.

  In the connector valve bodies 7, 8A to 8D, the leg portion 24 is formed integrally with the pair of columnar bodies 51a and 51b. However, in this invention, the leg portion may be formed separately from the pair of columnar bodies. In addition, the leg itself may not be formed. Each of the leg portions 24 is chamfered on the inner surface, but in the present invention, the inner surface may not be chamfered and may have the same vertical cross-sectional shape as the pair of columnar bodies.

  Since the connector according to the present invention includes the connector valve body according to the present invention that can contribute to sealing performance, ease of injection, and hygiene, for example, the connector valve body 7, a connector that connects at least two pipe bodies together Especially, it is suitably used as a medical connector.

  The connector according to the present invention includes at least two connection ports connectable to a tube body, a connector tube having an internal space communicating these connection ports, and a seat mounted on the valve seat and stored in the internal space. And a connector valve body. In the connector according to the present invention, the connection port of the connector tube is preferably connectable to, for example, a needle-free tube, and the internal space of the connector tube includes a fluid passage and a valve body housing portion for housing the valve body. Doubles as

  In this connector, the outer peripheral surface of the cylindrical hollow head seals the inner peripheral surface of the first connection port, and the second seal portion of the head support portion presses against the inner peripheral step adjacent to the first connection port. A first posture (also referred to as a sealed state) and a second posture (also referred to as an open state) that contracts in the axial direction by pressure acting in the axial direction to communicate the lumen of the tubular body with the internal space. It is possible to migrate to. As described above, the elastic deformation of the valve body shifts between a sealed state and an open state, and the connector opens and closes. That is, in the connector according to the present invention, when the needleless tube or the like is not connected to the connection port, the connector valve body according to the present invention seals the first connection port, while the needleless tube is connected to the connection port. In a state where the body or the like is connected, the connector valve body according to the present invention is elastically deformed to open the first connection port.

  The connector pipe of the connector according to the present invention can be used without limitation of a conventionally known connector pipe as long as the connector valve body can be incorporated. For example, as shown in FIGS. Examples thereof include a connector tube 5 having a letter shape, a connector tube having a substantially T shape in plan view, and a connector tube having a substantially cross shape in plan view.

  In the connector according to the present invention, the connector valve body according to the present invention is disposed in the valve body accommodating portion, and is preferably accommodated and disposed in a slightly compressed state in the direction of the axis C. At this time, in the connector valve body according to the present invention, at least one through-hole provided in the body portion may be directed to the third connection port 14 as shown in FIG. It may be toward the inner surface of the space.

  A needleless tube connected to the connector according to the present invention will be described. As this needleless tube body, various tubes can be used without particular limitation as long as it has a lumen, that is, a space for containing a fluid. As an example, for example, a needleless tube body shown in FIG. 81. The tip 82 of the needleless tubular body 81 has a shape that can be connected to the first connection port 12, and usually has a small-diameter annular structure having an outer diameter slightly smaller than the inner diameter of the first connection port 12. It has become. 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 and the needleless tube 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.

  A connector 1 which is an example of a connector according to the present invention will be described. As shown in FIGS. 6 and 7, the connector 1 includes a connector pipe 5 and a connector valve body 7. As shown in FIG. 7A, the connector valve body 7 is housed and disposed in the valve body housing portion 16 so that all the three through holes 52 to 54 are directed to the third connection port 14.

  As described above, the connector pipe 5 has a first connection port 12 disposed on one end side in the axial direction, a second connection port 13 disposed on the other end side, and a direction intersecting the axial direction. The third connection port 14 arranged so as to protrude to the inside, and an internal space 15 for communicating these connection ports 12 to 14. The valve body storage portion 16 has a large-diameter tubular hollow structure that connects the inside of the first connection port 12 to the first connection port 12 and the second connection port 13. Accordingly, an inner circumferential step 19 is formed at the boundary with the tubular hollow structure on the downstream side in the axis C direction of the first connection port 12, and the valve body storage portion 16 is at the boundary with the second connection port 13. A valve seat 18 is formed as an annular step portion on which the connector valve body 7 can be placed. As shown in FIG. 7, the connector pipe 5 includes a lid body 5 a having a first connection port 12 and a pipe body 5 b having a second connection port 13 and a third connection port 14. The body 5a and the tube body 5b are fixed by, for example, an adhesive or ultrasonic welding.

  In the connector 1, the connector valve body 7 is housed and disposed in the valve body housing portion 16 in a slightly compressed state in the direction of the axis C. As shown in FIG. When not connected to the connection port 12, the outer peripheral surface 32 of the cylindrical hollow head 21 is in close contact with the inner peripheral surface of the first connection port 12, and the second seal portion 41 of the head support portion 22 is the first. The first posture is in pressure contact with the inner circumferential step 19 adjacent to the connection port 12 toward the first connection port 12. Since the first connection port 12 is liquid-tightly sealed in this way, the outside and the inside of the connector 1 are blocked, and the blood of the patient that has passed through the third connection port 13 or the second connection The fluid or the like injected from the port 14 does not flow out of the first connection port 12, and the connector valve body 7 also functions as a check valve, a hemostasis valve, and the like. Further, when in the first posture, the top surface 36 exposed from the first connection port 12 is flat, and the top surface 36 and the peripheral surface 37 are outside the first connection port 12 as shown in FIG. Therefore, the top surface 36, the peripheral surface 37, and the first connection port 12 can be easily cleaned.

  In order to supply fluid to the patient via the connector 1, for example, as shown in FIG. 8, the distal end portion 82 of the needleless tube 81 is connected to the first connection port 12 against the elasticity of the connector valve 7. Press fit. Then, the connector valve body 7 is compressed and deformed by the pressing force in the direction of the axis C of the connector valve body 7 acting by the needleless tube body 81. At this time, the cylindrical hollow head 21 having the outer peripheral surface 32 and the top surface 36, the body portion 23 having the three through holes 52 to 54, and the head support portion 22 having the second seal portion 41 are integrated. Moreover, it functions organically, and the connector valve body 7 is entirely compressed and deformed along the axis C direction without substantially bending or tilting with respect to the axis C direction. Specifically, the body portion 23 is compressed by the pressing force transmitted from the head support portion 22 and, depending on the insertion pressure of the needleless tube 81 and, in some cases, the injection pressure of the fluid from the needleless tube 81 The disk-shaped seal portion 31 is depressed and deformed in the through hole 35, and the cylindrical hollow head 21 is also compressed and deformed in the direction of the axis C. At this time, as shown in FIG. 8, the compression of the trunk portion 23 having the above-described configuration causes the trunk portion 23 in the vicinity of the second through hole 53 to be preferentially and greatly compressed. The body portions 23 near 52 to 54 may be compressed to the same extent. When the body portion 23 is compressed and the disc-like seal portion 31 is depressed and deformed in this manner, the cylindrical hollow head portion 21 moves backward into or enters the internal space 15, so that the outer peripheral surface 32 is in close contact with the second seal portion 41. Both pressure contact states are released. On the other hand, since 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, the distal end surface 83 and the disk-shaped seal portion deformed in a depressed manner. A space 84 is formed between the two and 31. In this way, the lumen 81a and the internal space 15 communicate with each other, and the first connection port 12 is opened. Then, the fluid is injected from the needleless tube 81 into the connector tube 5 through this space 84, and then flows into the second connection port 14 through the flow path 17 and the valve seat 18. In this open state, the outer surface of the body portion 23 is in contact with the inner surface of the internal space 15.

  When the needleless tubular body 81 is removed from the first connection port 12 after the desired fluid has been injected into the connector 1 in this way, that is, retracted, the pressing force applied by the needleless tubular body 81 is released, and the connector The valve body 7 is restored by its own repulsive force or restoring force, and shifts to a sealed state in which the first connection port 12 is sealed. At this time or after the needleless tube 81 is removed, the fluid that has entered the through-hole 35 and the through-holes 52 to 54 easily flows out by its own weight, and the fluid adhering to the recess or groove 56 has its own weight. Thus, it can be easily dropped to the outside, and a large amount of fluid can be avoided from remaining in the connector 1, particularly the connector valve body 7.

  As described above, the connector 1 maintains a sealed state when the needleless tube 81 is not connected to the first connection port 12, and when the needleless tube 81 is connected to the first connection port 12. Holds the open state, and when the pressing force with which the needle-free tubular body 81 is removed from the first connection port 12 is released, the needleless tubular body 81 shifts to a sealed state. Specifically, as shown in FIGS. 6 and 7, when the connector 1 is in a sealed state in which the connector valve body 7 is housed in a slightly compressed state in the valve body housing portion 16, The first connection port 12 is hermetically sealed by the close contact of the first connection port 12 by 32 and the press contact of the inner circumferential step 19 by the second seal portion 41. On the other hand, when the needle-free tubular body 81 is in the open state inserted into the first connection port 12, as shown in FIG. 8 where the state is extracted, the connector valve body 7 is compressed and deformed in the direction of the axis C. The first connection port 12 is opened by the elimination of the hermetically sealed state and the deformation of the disk-shaped seal portion 31 that is recessed into the through hole 35. When the needleless tube 81 is removed from the first connection port 12, the connector valve body 7 that has been compressed and deformed in the direction of the axis C is particularly repulsive to the body 23 and the cylindrical hollow head 21. Thus, the film is stretched in the direction of the axis C to return to the initial state, ie, the sealed state. The compression deformation and extension of the connector valve body 7 at this time are along the axis C direction without substantially bending or tilting with respect to the axis C direction. Therefore, although the connector 1 can seal the 1st connection port 12 with high airtightness, the injection | pouring of a fluid is easy, and it is excellent also in the sanitary surface of the 1st connection port 12 vicinity. The connector valve 7 housed in the connector 1 greatly contributes to the sealing, ease of injection, and hygiene of the connector 1.

  As the connector according to the present invention, the connector 1 including the connector pipe 5 and the connector valve body 7 has been described as an example. However, instead of the connector valve body 7, the connector valve body according to the present invention is modified. Even if it is a connector provided with the valve bodies 8A-8D for connectors which are these, it functions similarly to the connector 1 and there exists the same effect.

  The connector 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, although the connector 1 is a mixed injection tube having three connection ports 12 to 14, the connector may be an injection tube having two connection ports in the present invention.

DESCRIPTION OF SYMBOLS 1 Connector 5 Connector pipe | tube 5a Cover body 5b Pipe body 7, 8A-8D Connector valve body 12 1st connection port 13 2nd connection port 14 3rd connection port 15 Internal space 16 Valve body accommodating part 17 Flow path 18 Valve seat 19 Inner peripheral step (inner peripheral surface)
21, 26A to 26D Cylindrical hollow head portion 22 Head support portion 23 Body portion 24 Leg portions 31, 31A to 31D Disc-shaped seal portion 32 Outer peripheral surface (annular seal surface)
33, 33A-33D Head side wall 34, 34A-34D Bottom 35, 39A-39D Through-hole 36 Top surface 37 Peripheral surface 41 Second seal portion (second support portion)
42 2nd support part 43 3rd support part 44 4th support part 51a, 51b Columnar body 51c Center ridgeline 52 1st through-hole 53 2nd through-hole 54 3rd through-hole 55a, 55b, 55c Reinforcement Portion 56 Recess or groove 81 Needleless tube 81a Lumen 82 Tip 83 Tip surface 84 Space

A preferred example of this connector valve body is:
(1) The cylindrical hollow head has at least one through-hole penetrating in a direction perpendicular to the axis thereof,
(2) The cylindrical hollow head has a two-fold rotational symmetry with respect to its axis,
(3) The cylindrical hollow head is disposed with a solid disc-shaped seal portion having the top surface, and spaced apart in the circumferential direction on the opposite side of the top surface of the disc-shaped seal portion. A plurality of head side walls extending along the space, and the space as the through hole surrounded by the disc-shaped seal portion and the head side wall,
(4) The cylindrical hollow head has a tapered shape toward the outside of the first connection port, and has a peripheral surface surrounding the top surface;
(5) The body portion has two-fold rotational symmetry with respect to the axis of the connector valve body,
(6) A pair of columnar bodies having a sector-shaped vertical cross section are connected to each other at their center ridge lines,
(7) A plurality of the through-holes in the body portion are arranged so that the center exists on the axis of the connector valve body along the extending direction of the body portion,
(8) Of the plurality of through holes in the body portion, the through holes arranged on the cylindrical hollow head side are smaller in size than other through holes,
(9) The body portion has a recess or a groove on the outer peripheral surface thereof so as to be symmetric with respect to the axis of the connector valve body,
(10) The recess or groove is disposed at least at one place between the two through holes disposed along the extending direction,
(11) The body portion includes a reinforcing portion that connects two pairs of side surfaces of the pair of columnar main bodies facing each other between the two through holes arranged along the axis of the connector valve body. Have at least one place,
(12) The connector valve body has a two-fold rotational symmetry with respect to its axis,
(13) The connector valve body is made of an elastic material,
(14) The connector valve body forms a flow passage through which fluid flows along with the inner surface of the internal space in the outer periphery of the connector valve body and the through hole.

The valve body for a connector according to the present invention, which is means for solving the above problems, is provided in the internal space of the connector pipe having at least two connection ports to which the tube body can be connected and an internal space that communicates these connection ports. the connector valve body to be housed, the outer peripheral surface, a top surface that bulges flat or outwardly exposed on the first connection port to close contact with the inner peripheral surface of the first of said connection port, and, itself A cylindrical hollow head having at least one through-hole penetrating in a direction perpendicular to the axis of the cylindrical hollow head, and disposed on the opposite side of the top surface of the cylindrical hollow head, to the axis of the cylindrical hollow head A head portion having a truncated cone-shaped seal portion which is disposed between the barrel portion extending along the cylindrical hollow head portion and the barrel portion and which is connected to the opposite side of the cylindrical hollow head portion ; A support portion, and the body portion is perpendicular to the axis. It has at least one through hole penetrating in the through hole, characterized in that stretch along its axial direction by being compressed in the axial direction.

A preferred example of this connector valve body is:
(1) The cylindrical hollow head has a two-fold rotational symmetry with respect to its axis,
(2) The cylindrical hollow head is disposed with a solid disc-shaped seal portion having the top surface, and spaced apart in the circumferential direction on the opposite side of the top surface of the disc-shaped seal portion. And a space as the through hole in the cylindrical hollow head surrounded by the disc-shaped seal portion and the head side wall,
(3) The cylindrical hollow head is tapered toward the outside of the first connection port, and has a peripheral surface surrounding the top surface;
(4) The body portion has two-fold rotational symmetry with respect to the axis of the connector valve body,
(5) A pair of columnar bodies having a sector-shaped vertical cross section are connected to each other at their center ridgeline,
(6) A plurality of the through holes in the body portion are arranged so that the center thereof exists on the axis of the connector valve body along the extending direction of the body portion,
(7) Of the plurality of through holes in the body portion, the through holes arranged on the cylindrical hollow head side are smaller in size than the other through holes,
(8) The body portion has a recess or a groove on the outer peripheral surface thereof so as to be symmetric with respect to the axis of the connector valve body,
(9) The recess or groove is disposed at least at one place between the two through holes disposed along the extending direction,
(10) The body portion includes a reinforcing portion that connects two pairs of side surfaces of the pair of columnar main bodies facing each other between the two through holes arranged along the axis of the connector valve body. Have at least one place,
(11) The connector valve body has two-fold rotational symmetry with respect to its axis,
(12) The connector valve body is made of an elastic material,
(13) The connector valve body forms a flow passage through which fluid flows along with the inner surface of the internal space in the outer periphery of the connector valve body and the through hole.

Connector valve body according to the present invention is a cylindrical hollow head with a top surface which bulges into flat or outwardly exposed on the outer peripheral surface and the first connection port to be in close contact with the inner peripheral surface of the first connection port The cylindrical hollow head is disposed on the opposite side of the top surface of the cylindrical hollow head and extends along the axis of the cylindrical hollow head, and is disposed between the cylindrical hollow head and the trunk. And a head support portion having a frustum-shaped second seal portion (also referred to as a frustum-shaped seal portion in the present invention) connected to the opposite side of the cylindrical hollow head, and the body portion with respect to the axis It has at least one through-hole penetrating in the vertical direction, and the through-hole is compressed in the axial direction to expand and contract along its own axial direction. The connector valve body according to the present invention having such characteristics can contribute to the combination of the connector sealing performance, ease of injection, and hygiene.

For example, in the connector valve bodies 7 and 8A to 8D, the cylindrical hollow heads 21 and 26A to 26D become cylindrical hollow bodies having one through hole 35 and 39A to 39D in order to achieve high stretch uniformity. However, in this invention, the cylindrical hollow head may be a hollow body having an internal hollow structure in which a hollow space is defined in a closed state inside the cylindrical hollow head without having a through hole. The cylindrical hollow heads 21, 26A to 26D have one through hole 35, 39A to 39D. In the present invention, the cylindrical hollow head preferably has two-fold rotational symmetry with respect to its axis. As such, it may have two or more through holes. Further, the cylindrical hollow heads 21 and 26A to 26D have two head side walls 33 and 33A to 33D. In the present invention, the cylindrical hollow head preferably has two-fold rotational symmetry with respect to its axis. It may have multiple, preferably even (4 or more) head and side walls. The head side walls 33 and 33A to 33D are erected on the bottoms 34 and 34A to 34D. In this invention, however, the cylindrical hollow head does not have a bottom, and the head side wall is erected directly on the head support. It may be. The cylindrical hollow heads 21, 26A to 26D have a flat top surface 36 and a peripheral surface 37. In this invention, the cylindrical hollow head is a curved surface that bulges outward from the first connection port. It may have a top surface, and may not have a peripheral surface and may be a top surface as a whole. Although the top surface 36 in the cylindrical hollow head 21,26A~26D has a convex portion and concave or recess without the plane of the groove such as a flat surface or projection, the top surface is first in the present invention You may have the protrusion or convex line | wire or groove | channel which protrudes toward the outer side of this connection port. If the top surface has such protrusions, etc., the ease of injecting the fluid is increased, and the protrusion is less likely to remain in the vicinity of the top surface after the fluid is injected from the needleless tube 81 into the connector 1. Even if fluid adheres to the top surface due to an increase in the surface area due to the above, the top surface is easy to dry and excellent in hygiene. In the cylindrical hollow heads 21 and 26A to 26D, the through holes 35 and 39A to 39D are gradually reduced in cross section from both sides of the penetration direction toward a plane perpendicular to the penetration direction and including the axis C. In the present invention, the through hole may have a cross section of the same size in the through direction.

The valve body for a connector according to the present invention, which is means for solving the above problems, is provided in the internal space of the connector pipe having at least two connection ports to which the tube body can be connected and an internal space that communicates these connection ports. A connector valve body to be housed,
An outer peripheral surface in intimate contact with an inner peripheral surface of the first connection port, a flat surface exposed to the first connection port or bulging outward, a solid disc-shaped seal portion having the top surface, A plurality of head side walls disposed along the axis on the opposite side of the top surface of the disc-shaped seal portion, and extending along the axis; and the disc-shaped seal portion and the head side wall. surrounded, have at least one through hole penetrating in a direction perpendicular to its axis, the outer peripheral surface discoidal sealing portion with a pressing force in the axial direction of the itself is depressed deformation in the through hole and A cylindrical hollow head that releases the pressure contact state with the inner peripheral surface and allows fluid to flow into the inner space ;
A barrel portion disposed on the opposite side of the top surface of the cylindrical hollow head and extending along the axis of the cylindrical hollow head;
A head support portion disposed between the cylindrical hollow head portion and the body portion and having a frustum-shaped seal portion connected to the opposite side of the cylindrical hollow head portion;
The body portion has at least one through-hole penetrating in a direction perpendicular to the axis, and the through-hole is compressed in the axial direction to expand and contract along its own axis. To do.

A preferred example of this connector valve body is:
(1) The cylindrical hollow head has a two-fold rotational symmetry with respect to its axis,
(2) The disk-shaped seal portion has a thickness of 0.5 to 2 mm,
(3) The cylindrical hollow head is tapered toward the outside of the first connection port, and has a peripheral surface surrounding the top surface;
(4) The body portion has two-fold rotational symmetry with respect to the axis of the connector valve body,
(5) A pair of columnar bodies having a sector-shaped vertical cross section are connected to each other at their center ridgeline,
(6) A plurality of the through holes in the body portion are arranged so that the center thereof exists on the axis of the connector valve body along the extending direction of the body portion,
(7) Of the plurality of through holes in the body portion, the through holes arranged on the cylindrical hollow head side are smaller in size than the other through holes,
(8) The body portion has a recess or a groove on the outer peripheral surface thereof so as to be symmetric with respect to the axis of the connector valve body,
(9) The recess or groove is disposed at least at one place between the two through holes disposed along the extending direction,
(10) The body portion includes a reinforcing portion that connects two pairs of side surfaces of the pair of columnar bodies facing each other between the two through holes arranged along the axis of the connector valve body. Have at least one place,
(11) The connector valve body has two-fold rotational symmetry with respect to its axis,
(12) The connector valve body is made of an elastic material,
(13) The connector valve body forms a flow passage through which fluid flows along with the inner surface of the internal space in the outer periphery of the connector valve body and the through hole.

Claims (24)

A connector valve body housed in the internal space of a connector pipe having at least two connection ports connectable to a tube body and an internal space communicating these connection ports,
A cylindrical hollow head having an outer peripheral surface that is in close contact with an inner peripheral surface of the first connection port, and a flat surface that is exposed to the first connection port or bulges outward.
A barrel portion disposed on the opposite side of the top surface of the cylindrical hollow head and extending along the axis of the cylindrical hollow head;
A head support portion disposed between the cylindrical hollow head portion and the body portion and having a frustum-shaped second seal portion connected to the opposite side of the cylindrical hollow head portion; ,
The body portion has at least one through-hole penetrating in a direction perpendicular to the axis, and the through-hole is compressed in the axial direction to expand and contract along its own axial direction. Valve body for connector.   2. The connector valve body according to claim 1, wherein the cylindrical hollow head has at least one through-hole penetrating in a direction perpendicular to an axis thereof.   The valve body for a connector according to claim 1 or 2, wherein the cylindrical hollow head has a two-fold rotational symmetry with respect to an axis thereof.   The cylindrical hollow head has a solid disc-shaped seal portion having the top surface, and is disposed on the opposite side of the top surface of the disc-shaped seal portion with an interval in the circumferential direction, along the axis. The plurality of head side walls extending in length, and the space as the through hole surrounded by the disc-shaped seal portion and the head side wall. Valve body for connectors.   The valve body for a connector according to claim 4, wherein the disk-shaped seal portion has a thickness of 0.5 to 2 mm.   The said cylindrical hollow head comprises the peripheral surface which comprises the taper shape which goes outside the said 1st connection port, and surrounds the said top surface. Valve body for connectors.   The connector body according to any one of claims 1 to 6, wherein the body portion has two-fold rotational symmetry with respect to an axis of the connector valve body.   The said trunk | drum is a valve body for connectors of any one of Claims 1-7 with which a pair of columnar main body which has a fan-shaped perpendicular cross section is mutually connected by those center ridgelines.   9. The connector according to claim 1, wherein a plurality of the through holes are arranged so that a center thereof exists on an axis of the connector valve body along an extending direction of the body portion. Valve body.   The connector valve body according to any one of claims 1 to 9, wherein the through holes are arranged in a plurality of rows so as to be symmetric with respect to an axis of the connector valve body.   The valve body for a connector according to claim 9 or 10, wherein a through hole arranged on the cylindrical hollow head side among the plurality of through holes has a smaller size than other through holes.   The valve body for a connector according to any one of claims 9 to 11, wherein the plurality of through holes have their axes arranged substantially in parallel.   The connector valve body according to any one of claims 1 to 12, wherein the body portion has an outer diameter that comes into contact with an inner surface of the inner space when contracted in an axial direction thereof.   The connector body according to any one of claims 1 to 13, wherein the body portion has a recess or a groove on an outer peripheral surface thereof so as to be symmetric with respect to an axis of the connector valve body.   The connector valve body according to claim 14, wherein the concave portion or the groove is disposed at least at one place between the two through holes disposed along the extending direction.   The trunk portion includes at least one reinforcing portion that connects two sets of side surfaces of the pair of columnar bodies facing each other between the two through holes arranged along the axis of the connector valve body. The connector valve body according to any one of claims 9 to 15.   The connector valve body according to claim 16, wherein the reinforcing portion has a size smaller than a radius of the columnar main body.   The connector head according to claim 1, wherein the head support portion is solid.   The connector valve body according to any one of claims 1 to 18, wherein the connector valve body has a two-fold rotational symmetry with respect to an axis thereof.   The connector valve body according to claim 1, wherein the connector valve body is made of an elastic material.   The said valve body for connectors forms the flow path which distribute | circulates a fluid with the inner surface of the said internal space in the outer periphery of the said valve body for connectors, and the said through-hole, The valve for connectors of any one of Claims 1-20 body. A connector pipe having at least two connection ports connectable to the tube body and an internal space communicating these connection ports;
The connector valve body according to any one of claims 1 to 21, which is placed on a valve seat and stored in the internal space.
The connector valve body has a first posture in which the outer peripheral surface seals an inner peripheral surface of the first connection port and the second seal portion is in pressure contact with an inner peripheral step adjacent to the first connection port. The connector is capable of shifting to a second posture in which the lumen of the tubular body communicates with the internal space by contracting in the axial direction by pressure acting in the axial direction.   The connector according to claim 22, wherein the connector is an injection pipe including the connector pipe having the two connection ports.   The connector according to claim 22, wherein the connector is a mixed injection pipe including the connector pipe having at least three connection ports.

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