JP2013044375A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector that exhibits high durability with a simple configuration.SOLUTION: The connector includes: a connector tube 6 that has at least two connecting ports 12-14 that allow a tube body 81 to be connected thereto and an internal space 15 communicating the connecting ports 12-14 with each other; a valve body 7A that has a first magnet 8A and seals the first connecting port 12; and a second magnet 9A arranged in the internal space 15 so as to repel against the first magnet 8A.

Description

  The present invention relates to a connector, and more particularly to a connector that exhibits high durability with a simple configuration.

  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 valve body is provided inside.

  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. As such a medical connector, for example, Patent Document 1 describes “an assembly for connecting a fluid line including a first connecting member, a valve member, and a second connecting member” (for example, claims) Item 1). In this assembly for fluid line connection, “the stem moves toward the second coupling member, thereby compressing the elastic body and moving the sealing surface away from the female luer, It is dimensioned so that there is an open fluid communication between the luer and the cylindrical chamber ”(claim 2, FIGS. 4-6, etc.).

  Another type of connector or valve body includes, for example, a medical connector that opens and closes a connection port by inclining or bending a valve body that closes the connection port with respect to the axial direction. As such a medical connector, for example, Patent Document 2 generally describes “a housing extending along an axis, and a first seat for sealing a valve seat built in the housing and disposed at the base end of the housing. "Connector including a posture and a valve element whose own axis is deformed to a second posture deviated from the axis of the housing" (Claim 1 etc.) (column 9, line 19 to line 34, FIG. 12 etc.).

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

  Such a medical connector may be disposable after administration of the first fluid in order to prevent infection by infectious diseases. However, the second connector passes through one connector until the administration of the first fluid is completed. Multiple fluids may be injected or multiple 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 built into the connector not only has a sealing property that seals the connection port in a liquid-tight manner, but also opens and closes the connection port in the same way so that fluid can be easily injected even when multiple injections of fluid are performed. Open / close performance is required.

  However, in the assembly of Patent Document 1, when the elastic body is compressed a plurality of times, particularly a large number of times, the compressed state may not be uniform, and the valve element of Patent Document 2 is displaced a plurality of times, particularly a large number of times, from the axis of the housing. When the second posture is deformed, the deformed state and the return state of the valve element may gradually become non-uniform. In the first place, since the assembly of Patent Document 1 has a complicated structure, the influence of the complicated structure on the uniformity of the compressed state is not small.

  In this way, if the uniformity of the compressed state or the deformed state is impaired, the sealing performance may be reduced, and the fluid in the connector may leak from the connection port, and the fluid can be easily and reliably injected from the tube into the connector. It may not be possible. Therefore, a connector in recent years is required to have durability that allows the valve body of the connector to be opened and closed uniformly even when fluid is injected a plurality of times, particularly a large number of times.

  An object of the present invention is to provide a connector that exhibits high durability with a simple configuration.

  The inventors of the present invention have intensively studied the durability of the connector, particularly the valve body, focusing on the structure of the connector and the valve body, the opening / closing operation, etc., and embedded the magnets so that they repel each other. Alternatively, it has been found that the arrangement of the connector itself can simplify the structure of the connector itself and can smoothly open and close the valve body without the need to elastically deform the valve body or the like.

  The connector according to the present invention, which is means for solving the above-mentioned problems, has a connector pipe having at least two connection ports to which a tube body can be connected and an internal space communicating these connection ports, and a first magnet. And a valve body that seals the first connection port, and a second magnet disposed in the internal space so as to repel the first magnet.

A suitable example of this connector is
(1) The second magnet is embedded in a core disposed in the internal space,
(2) The core is arranged in a floating state in the internal space with a support portion extending radially from the side surface to the internal space.
(3) The support portion includes at least one support body that extends radially from the side surface to the internal space and at least one penetration portion that penetrates in the axial direction of the core,
(4) The core is disposed with an axis different from the axis of the internal space,
(5) The valve body has a side surface or an annular seal portion that is in close contact with the inner peripheral surface of the first connection port,
(6) The valve body is a flat surface with a top surface exposed at the first connection port or a curved surface bulging outward,
(7) The valve body is entirely made of an elastic material,
(8) At least one of the end portion located on the core side in the valve body and the end portion located on the valve body side in the core is inclined with respect to the axis of the first connection port,
(9) The end of the valve body and the end of the core are both inclined in the same direction,
(10) The valve body is a sealed position for sealing the first connection port by a repulsive force between the magnetic force of the first magnet and the magnetic force of the second magnet, and an open position for opening the first connection port. And can be migrated to
(11) The connector is an injection pipe provided with the connector pipe having the two connection ports,
(12) The connector is a mixed injection tube including the connector tube having at least three connection ports.

  The connector according to the present invention has a simple structure in which a magnet is arranged in each of the valve body and the connector, and the valve body is uniform with a repulsive force based on the magnetic force of the magnet without deforming the valve body or the constituent members of the connector. Open and close. Therefore, the connector according to the present invention exhibits high durability despite the simple configuration.

FIG. 1 is a schematic cross-sectional view showing an example of a connector according to the present invention, FIG. 1 (a) is a schematic cross-sectional view showing a sealed state in an example of a connector according to the present invention, and FIG. 1A is a schematic cross-sectional view showing an AA cross section in FIG. 1A, and FIG. 1C is a schematic cross-sectional view showing an open state in an example of a connector according to the present invention. 2 is a schematic cross-sectional view showing another example of the connector according to the present invention, and FIG. 2 (a) is a schematic cross-sectional view showing a sealed state in another example of the connector according to the present invention. FIG. 2B is a schematic sectional view showing a sealed state in another example of the connector according to the present invention, and FIG. 2C is a schematic sectional view showing an open state in another example of the connector according to the present invention. . FIG. 3 is a schematic cross-sectional view showing still another example of the connector according to the present invention, and FIG. 3 (a) is a schematic cross-sectional view showing a sealed state in still another example of the connector according to the present invention. 3 (b) is a schematic cross-sectional view showing the AA cross section in FIG. 3 (a), and FIG. 3 (c) is a schematic cross-sectional view showing an open state in still another example of the connector according to the present invention. It is.

  The 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, etc. A medical connector that connects the tube and a tube body such as a syringe without a 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, mixed injection. It is preferably used as a tube or the like.

  The connector according to the present invention includes at least two connection ports to which a tube body can be connected, a connector tube having an internal space communicating these connection ports, a first magnet, and the first connection port. A valve body to be sealed and a second magnet disposed in the internal space of the connector pipe so as to repel the first magnet are provided. In the connector according to the present invention, the connection port of the connector tube is preferably connectable with, for example, a needleless tube, and the internal space of the connector tube accommodates the fluid flow path, the valve body, and the second magnet. Also serves as a storage unit.

  In this connector, the valve body incorporates the first magnet, and the second magnet is disposed in the internal space of the connector tube. Therefore, the valve body is opened and closed by the repulsive force of these magnets. 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 valve body is biased toward the connection port by the repulsive force between the first magnet and the second magnet. Reach the sealing position and seal the connection port. On the other hand, in a state where a needleless tube or the like is connected to the connection port, the valve body close to the second magnet reaches the sealed position biased in the horizontal direction by the repulsive force against the repulsive force with the second magnet. To open the connection port.

  In the connector according to the present invention, the valve body is thus uniformly opened and closed by the repulsive force based on the magnetic force of the magnet. Therefore, even if the connector according to the present invention has a simple configuration in which at least two magnets that repel each other are arranged or built-in, the magnetic force of the magnet is almost unchanged and is usually constant. Even if it is performed many times, the valve body opens and closes uniformly and exhibits high durability.

  As described above, in the present invention, it is sufficient that at least one magnet is disposed in each of the valve body and the connector pipe, and other configurations can be appropriately changed according to functions required for the connector.

  The connector according to the present invention will be specifically described. A connector 1 which is an example of a connector according to the present invention includes a connector tube 6 having a substantially T-shape in plan view and a valve body incorporated in the connector tube 6 as shown in FIGS. 7A and a second magnet 9A disposed in the internal space of the connector tube 6. As long as the connector body 6 can contain or arrange the valve body 7A and the second magnet 9A, a conventionally known connector pipe can be used without limitation. For example, the connector pipe 6 has a substantially T-shape in a plan view shown in FIG. Examples of the connector tube 6 include a connector tube having a substantially Y shape in plan view and a connector tube having a substantially cross shape in plan view.

  The connector tube 6 has a substantially hollow cylindrical shape, and a first connection port 12 to which a needleless tube 81 is connected is disposed on one end side in the axial direction, and is connected to a catheter or the like on the other end side. A second connection port 13 to which the tubular body is connected is disposed, protrudes in a direction intersecting the axial direction, and a third connection port 14 to which a tubular body connected to a bag or the like storing fluid is connected is provided. Has been placed. In this connector tube 6, for example, a needleless tube 81 or the like is connected to the first connection port 12, and a tube (not shown) connected to a catheter or the like placed in the patient is connected to the second connection port 13. Connected to the third connection port 14 is a tube (not shown) connected to a bag or the like that stores a fluid to be administered to a patient. Each connection port 12 to 14 of the connector pipe 6 is formed with a structure that can be connected to a needleless tube 81 described later or a structure that can temporarily hold the connection, for example, a luer lock screw or the like. . In this connector pipe 6, the internal space 15 has the largest hollow structure, and the first connection port 12, the second connection port 13, and the third connection port 14 have a smaller diameter than the internal space 15. It has a tubular structure.

  In this connector pipe 6, the connection ports 12 to 14 are communicated between the first connection port 12 and the second connection port 13, and an internal space 15 in which the valve body 7 </ b> A and the second magnet 9 </ b> A can be accommodated is disposed. Has been. The internal space 15 also serves as a fluid flow path and a storage portion for storing the valve body 7A and the second magnet 9A. Specifically, the internal space 15 includes a first reduced diameter portion 16 having a frustoconical shape on the first connection port 12 side, a second reduced diameter portion 18 having a hemispherical shape on the second connection port 13 side, It has a hollow cylindrical shape having an intermediate portion 17 having a constant inner diameter between one reduced diameter portion 16 and the second reduced diameter portion 18. The internal space 15, particularly the intermediate portion 17, has a diameter smaller than the sum of the diameter of the first connection port 13 and the diameter of a valve body 7 </ b> A described later. When the internal space 15 has such a diameter, even if the valve body 7A is biased with respect to the axis of the connector pipe 6, it is possible to maintain the contact or pressure contact state with the distal end surface 83 of the needleless pipe body 81. It is easy to return from the open position to the sealed position, and fluid leakage from the internal space 15 can be prevented. Since the first reduced diameter portion 16 of the internal space 15 has a truncated cone shape with the inner diameter gradually decreasing toward the first connection port 12, the valve body 7A is in a sealed position from the open position to the inner peripheral surface. The guide surface 19 guides the valve body 7A when shifting to or returning.

  The valve body 7A has a substantially cylindrical shape, and has an outer diameter that is the same as or slightly larger than the inner diameter of the first connection port 12, and is a side surface that is in close contact with the inner peripheral surface of the first connection port 12. It has an outer peripheral surface. Accordingly, the valve body 7A enters the first connection port 12 and seals the first connection port 12 in a liquid-tight manner. The valve body 7A is solid so as not to be greatly deformed by the pressure acting in its own axial direction. In the valve body 7A, the top surface 21 exposed to the first connection port 12 is a flat surface, the first connection port 12 and the top surface 21 can be easily cleaned, and propagation of bacteria and the like can be suppressed. Yes. The bottom surface opposite to the top surface 21 of the valve body 7A is a plane perpendicular to the axis of the valve body 7A.

  The valve body 7A is preferably made of an elastic material and has elasticity in that the first connection port 12 is excellent in hermeticity. For example, it is preferable that the valve body 7A has an elasticity for expressing a JIS A hardness of 30 to 70. Examples of elastic materials that exhibit such hardness include various rubbers and various elastomers. Examples of the rubber include silicone rubber, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, urethane rubber, and fluorine rubber. . Examples of the elastomer include a styrene thermoplastic elastomer, a polyolefin thermoplastic elastomer, a polyvinyl chloride thermoplastic elastomer, a polyurethane thermoplastic elastomer, a polyester thermoplastic elastomer, a polyamide thermoplastic elastomer, a polybutadiene thermoplastic elastomer, Examples thereof include trans polyisoprene-based thermoplastic elastomers, fluororubber-based thermoplastic elastomers, and chlorinated polyethylene-based thermoplastic elastomers. This valve body can be manufactured by molding or processing these elastic members by a conventional method.

  The valve body 7A is preferably made of a resin material or a metal material that does not easily swell with a fluid injected into the connector 1. Examples of such a resin material include polyolefins such as silicon resin, 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 copolymers, polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT), polyethers, polyethers Luketone (PEK), polyetheretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), Examples include polytetrafluoroethylene, polyvinylidene fluoride, fluorine-based resins, blends containing one or more of these resins, and polymer alloys. Examples of the metal material include stainless steel, aluminum, nickel, and the like. When the valve body 7A is made of a resin material or a metal material, the inner wall of the first connection port protrudes radially from the outer peripheral surface of the valve body 7A in order to ensure the sealing property of the first connection port 12. It is preferable to provide an annular seal portion or an O-ring made of an elastic material in close contact with the peripheral surface.

  In the valve body 7A, a first magnet 8A is embedded in the vicinity of the bottom located on the opposite side of the top surface 21 of the valve body 7A. The first magnet 8A is arranged so as to repel the magnetic force of the second magnet 9A described later, and the valve body 7A can seal the first connection port 12 by the repulsive force with the second magnet 9A. Has a magnetic force of. Therefore, the valve body 7A is disposed in the internal space 15 so as to enter the first connection port 12 by the repulsive force of the magnetic force when no pressure is applied to the valve body 7A. Therefore, as long as the first magnet 8A has a magnetic force that allows the valve body 7A to enter the first connection port 12, the material, magnetic force, shape, number, and the like are not particularly limited, and the permanent magnet However, an electromagnet may be used. For example, examples of the shape of the first magnet 8A include a spherical shape, an elliptical shape, a disk shape, and a columnar shape, and one or a plurality of the first magnets 8A may be embedded in the valve body 7A. Examples of the first magnet include a magnetite, an alnico magnet, a ferrite magnet, a rare earth magnet (for example, a neodymium magnet, a samarium cobalt magnet, etc.), and may be a bonded magnet. In the valve body 7A, a spherical permanent magnet is adopted as the first magnet 8A.

  The second magnet 9A is arranged in the internal space 15 so as to repel the first magnet 8A. Specifically, the second magnet 9A is preferably arranged in the internal space 15 so as to share the axis C of the connector 1. Embedded in the core 31. The core 31 is a cylindrical body in which both end surfaces in the axial direction have flat surfaces perpendicular to the axial line. The core 31 is floated in the internal space 15 by a support portion 32 extending radially from the side surface to the inner surface of the internal space 15, that is, the end of the core 31 on the second connection port 13 side is separated from the connection port 13. It is arranged in the state. When the second magnet 9A is thus embedded in the core 31 and disposed in the internal space 15, the structure of the connector 1 itself is simplified, and the first connection port 12 and the third connection port 3 are arranged. The fluid injected into the connector pipe 6 from the connection port 14 can easily flow to the second connection port 13.

  As shown well in FIGS. 1A and 1B, the support portion 32 has an equal interval in the circumferential direction of the core 31 from the outer peripheral surface of the core 31 on the first connection port 12 side. There are four columnar supports 33 extending radially in the inner space 15, that is, substantially perpendicular to the axis of the connector 1, two adjacent casting supports 33, the outer peripheral surface of the core 31, and the inner space 15. It has four fan-shaped through portions 34 that are defined by the peripheral surface and penetrate in the axial direction of the internal space 15. The casting support 33 has a cross shape in a plan view and is connected to the inner surface of the internal space 15 on the first connection port 12 side of the opening of the third connection port 14 in the axial direction of the internal space 15. The length has been determined. When the support portion 32 is configured in this manner, the core 31 and the second magnet 9A can be arranged in the internal space 15 as desired, and the connector from the first connection port 12 and the third connection port 14 can be used. The fluid injected into the tube 6 can easily flow through the second connection port 13.

  The core 31 is preferably made of a resin material, a metal material, or an elastic material, and more preferably made of a resin material or a metal material that hardly swells with a fluid injected into the connector 4. It is particularly preferable that it is made of a resin material in terms of ease of molding. The resin material and the metal material are as described above. Among these, a thermoplastic resin is particularly preferable in terms of excellent moldability.

  The second magnet 9A is embedded in the vicinity of the upstream end of the core 31 on the first connection port 12 side so as to repel the magnetic force of the first magnet 8A, and repels the first magnet 8A. The valve body 7A has a magnetic force that can seal the first connection port 12 by force. Therefore, the material, magnetic force, shape, number, and the like of the second magnet 9A are not particularly limited as long as the second magnet 9A has a magnetic force that allows the valve body 7A to enter the first connection port 12. The permanent magnet However, an electromagnet may be used. These are as described for the first magnet 8A. In the valve body 7A, a spherical permanent magnet is adopted as the second magnet 9A. As shown in FIG. 1A, the second magnet 9A is arranged on the same straight line as the first magnet 8A, that is, on the axis C of the connector 4 when no pressure is applied to the valve body 7A. Has been.

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

  The connector tube 6 and the needleless tube 81 are usually formed of a rigid material, for example, a resin material, a glass material, a ceramic, or a metal material. As the resin material and the metal material, the materials exemplified in the valve body 7A can be exemplified without any particular limitation.

  The connector 1 includes a connector pipe 6, a valve body 7A, and a second magnet 9A. The repulsive force between the magnetic force of the first magnet 8A embedded in the valve body 7A and the magnetic force of the second magnet 9A. The valve body 7A closes the first connection port 12 and the valve body against the repulsive force of the magnetic force due to the pressure acting in the axial direction of the valve body 7A due to the tube body entering the first connection port 12. 7A can move back into the internal space 15 and move to an open position where the lumen of the tube and the internal space 15 communicate with each other.

  The operation of the connector 1 will be specifically described. As shown in FIG. 1A, the connector 1 has a second magnet 9 </ b> A embedded in the core 31 when the needleless tube 81 is not connected to the first connection port 12. Is urged toward the first connection port 12 by the repulsive force and enters the inside thereof. At this time, the valve body 7A is positioned at a sealing position where the side surface is in close contact with the inner surface of the first connection port 12 and the first connection port 12 is liquid-tightly sealed. Since the valve body 7A seals the first connection port 12 in this way, the blood of the patient that has passed through the third connection port 13 or the fluid injected from the second connection port 14 is the first connection port. This valve element 7A also functions as a check valve, a hemostatic valve, and the like. In addition, since the flat top surface 21 of the valve body 7A is exposed to the first connection port 12 at the sealing position, it can be easily cleaned.

  In order to supply fluid to the patient via the connector 1, as shown in FIG. 1 (c), the distal end portion 82 of the needleless tubular body 81 is opposed to the repulsive force of the magnets 8A and 9A. 12 to press fit. Then, the valve body 7A retreats into the internal space 15 by the pressing force in the direction of the axis C of the valve body 7A acting by the needleless tubular body 81, and the axis is repulsively gradually increased as it approaches the second magnet. It will be in the state deviated from the axis C of connector 1 in the radial direction. On the other hand, the axis of the needleless tubular body 81 press-fitted into the first connection port 12 along the axis C coincides with the axis C. Accordingly, the axis of the biased top surface 21 of the valve body 7A and the distal end surface 83 of the needleless tubular body 81 are also shifted so that the opening of the lumen 81a in the distal end surface 83 communicates with the internal space 15 and fills the inner lumen 81a. The fluid is injected into the connector pipe 6. When the distal end portion 82 of the tube body 81 is press-fitted into the first connection port 12 in this way, the valve body 7A is in an open position where the lumen 81a of the needleless tube body 81 and the internal space 15 communicate with each other. Open mouth 12. The injected fluid flows through the outer periphery of the valve body 7 </ b> A and the through portion 34 and flows into the second connection port 13.

  When the needleless tubular body 81 is removed or retracted from the first connection port 12 after injecting a desired fluid into the connector 1 in this way, the pressing force applied by the needleless tubular body 81 is released, and the valve The body 7A advances toward the first connection port 12 while being guided by the guide surface 19 of the internal space 15 by the repulsive force of the magnets 8A and 9A, and moves to the sealed position, that is, returns.

  That is, the connector 1 having a simple structure including the valve body 7A and the second magnet 9A maintains the sealed position when the needleless tube 81 is not connected to the first connection port 12, and the needle 1 When the tubeless body 81 is connected to the first connection port 12, the open position is maintained, and when the pressing force with which the needleless tube 81 is removed from the first connection port 12 is released, the magnet is released. The valve body 7A is moved from the open position to the sealed position by the repulsive force of 8A and 9A and the guide surface 19. Therefore, since the first connection port 12 is opened and closed by the repulsive force of the magnet that is almost unchanged in this way, even if the fluid is injected a plurality of times, particularly a plurality of times, the first position of the valve body 7A. In addition, the transition of the second position is repeated uniformly in the same manner every time, and high durability is exhibited without any fluid leakage and no decrease in ease of injection.

  Further, when the valve body 7A, the core 31 and the support portion 32 are made of a resin material in the connector 1, the resin material is hardly swollen or extracted by the fluid, and the expected function is maintained for a long time. And has high safety.

  The connector 2, which is another example of the connector according to the present invention, includes a connector pipe 6, a valve body 7B, and a second magnet 9B, as shown in FIG. The connector 2 is basically the same as the connector 1 except that the shapes of the first magnet 8B and the second magnet 9B are different from those of the first magnet 8A and the second magnet 9A. Specifically, both the first magnet 8B and the second magnet 9B are not spherical but disk-shaped. Therefore, this connector 2 exhibits high durability since the valve element 7B opens and closes basically in the same manner as the connector 1.

  A connector 3, which is another example of the connector according to the present invention, includes a connector pipe 6, a valve body 7C, and a second magnet 9A, as shown in FIGS. 2 (b) and 2 (c). Yes. The connector 3 is basically the same as the connector 1 except that the shapes of the valve body 7C and the core 37 are different.

  That is, the valve body 7 </ b> C has a bottom surface 22 whose end located on the core 37 side is inclined with respect to the first connection port 12, that is, the axis C of the connector 3. The bottom surface 22 is located on the side opposite to the top surface 21. The core 37 has a top surface 38 whose end located on the valve body 7 </ b> C side is inclined with respect to the first connection port 12, that is, the axis C of the connector 3. The bottom surface 22 and the top surface 38 are inclined in the same direction, and are preferably inclined at the same inclination angle so as to face each other in parallel. When the bottom surface 22 and the top surface 38 are inclined as described above, the valve body 7C that has reached the top surface 38 follows the inclination direction of the top surface 38 as shown in FIG. The fluid can be quickly injected into the connector 1 from the needleless tube 81.

  Since this connector 3 is basically the same as the connector 1 except for the bottom surface 22 and the top surface 38, the valve body 7C opens and closes basically in the same manner as the connector 1 and exhibits high durability.

  The connector 4, which is still another example of the connector according to the present invention, includes a connector pipe 6, a valve body 7D, and a second magnet 9B, as shown in FIGS. 3 (a) to 3 (c). ing. This connector 4 is basically the same as the connector 1 except that the valve body 7D and the core 41 are different.

  The valve body 7D includes a cylindrical main body 25 having an outer diameter equal to or slightly larger than the inner diameter of the first connection port 12, a truncated cone-shaped bottom portion 26 disposed on the opposite side of the top surface 21 of the main body 25, and a bottom portion 26 is basically the same as the valve body 7A except that it has the first magnet 8B embedded in 26. A peripheral side surface of the bottom portion 26 is inclined so as to correspond to a support portion 42 described later.

  The core 41 is embedded in the internal space 15 so as to embed the second magnet 9B and to have an axis different from the axis of the internal space 15 by a support portion 42 extending radially from the side surface to the inner surface of the internal space 15. It is basically the same as the core 31 except for the above. The support portion 42 includes two fan-like support bodies 43 extending radially from the outer peripheral surface of the core 41 on the first connection port 12 side at equal intervals in the circumferential direction of the core 41, and the fan-like support bodies 43, It has two fan-shaped through portions 44 defined by the outer peripheral surface of the core 41 and the inner peripheral surface of the internal space 15 and penetrating in the axial direction of the internal space 15. Each of the fan-like support bodies 43 has an inclined surface in which the surface on the first connection port 12 side descends at the same angle from the inner peripheral surface side of the internal space 15 toward the core 41 side. The fan-shaped support body 43 located on the larger distance between the inner space 15 and the inner peripheral surface of the internal space 15 functions as a guide surface that guides the retraction and deviation of the valve body 7D. When the valve body 7D, the core 41, and the support portion 42 are configured in this manner, as shown in FIG. 3C, the valve body 7C is guided by the fan-shaped support body 43 as it moves backward and is biased. Since the child 41 is stably held at the open position in series, the fluid can be quickly injected into the connector 1 from the needleless tube 81.

  Since this connector 4 is basically the same as the connector 1 except for the valve body 7D, the core 41 and the support portion 42, the valve body 7D opens and closes basically in the same manner as the connector 1 and exhibits high durability.

  3 is exaggerated for ease of understanding, but the position where the second magnet 9B is disposed takes into account the repulsive force of the magnets 8B and 9B, the wall thickness of the needleless tubular body 81, and the like. It is determined appropriately.

  The connector according to the present invention is not limited to the above-described embodiments, and various modifications can be made within a range in which the object of the present invention can be achieved.

  For example, each of the connectors 1 to 4 has one first magnet 8A or 8B and one second magnet 9A or 9B. In the present invention, a plurality of the first magnets and the second magnets are arranged. Or it may be buried. Further, in the connectors 1 to 4, the valve bodies 7A to 7D each have the first magnet 8A or 8B embedded in the vicinity of the bottom, but in the present invention, the valve body has the first magnet. For example, it may be embedded or incorporated so that a part of the bottom surface is exposed.

  In the connectors 1 to 4, the valve bodies 7 </ b> A to 7 </ b> D are all cylindrical, but in the present invention, the valve body protrudes radially from the outer peripheral surface so that the valve body does not fall out from the first connection port. You may provide the protrusion part which regulates. Each of the valve bodies 7A to 7D has a side surface that is in close contact with the inner peripheral surface of the first connection port 12. In this invention, the valve body protrudes radially on the outer peripheral surface of the first connection port. An annular seal portion or an O-ring made of an elastic material, which is in close contact with the inner peripheral surface, may be provided. Further, the valve bodies 7A to 7D all have a flat top surface 21 exposed at the first connection port 12. In the present invention, the valve body is a top surface exposed at the first connection port. May be a curved surface that bulges outward, and may have a groove or ridge for guiding fluid on its top surface. When the top surface of the valve body has such grooves or ridges, the tip and top surfaces of the needleless tube body are small even if the valve body is biased laterally from the connector axis. Since a space or a gap through which the fluid circulates is formed, the fluid injectability is enhanced.

  In the connectors 1 to 4, the support portions 32 and 42 have a casting support 33 or a fan-like support 43 and a through-holes 34 and 44 extending radially from the side surface of the core 31, 37 or 41 to the internal space 15. However, in the present invention, the support portion has at least one support leg extending from the bottom or side surface of the core toward the second connection port to the second reduced diameter portion, and is a cast-like support or a fan-like support. Instead of or in combination with a cast support or a fan-shaped support.

  In the connectors 1 to 3, the support portion 32 has four casting support bodies 33 and four penetration portions 34, and in the connector 4, the support portion 42 has two fan-like support bodies 43 and two penetration portions 44. However, in the present invention, the support portion only needs to have at least one support body and at least one penetration portion, and the shape and dimensions of the support body and the penetration portion are not particularly limited, and the shape and dimensions of the connector are not limited. It can be determined accordingly. In addition, in the connectors 1 to 4, the casting support 33 and the fan-shaped support 43 have the axial length determined as described above, but in this invention, the axial length of the support is not particularly limited, For example, if the support is arranged so as to sandwich the opening of the third connection port, the length in the axial direction can be set to be the same as that of the core or can be set to be longer than the core.

  In the connectors 1 to 4, the second magnet 9A or 9B is embedded in the vicinity of the upstream end of the core 31, 37 or 41. In the present invention, the second magnet is disposed in the internal space. For example, it may be embedded or incorporated so that a part of the core is exposed at the upstream end face.

  The connector 4 has an inclined surface that extends in the oblique direction in either of the two fan-like support bodies 43. However, in the present invention, one fan-like support body having an inclined surface may be used, It may be a part.

1, 2, 3, 4 Connector 6 Connector pipe 7A-7D Valve body 8A, 8B 1st magnet 9A, 9B 2nd magnet 12 1st connection port 13 2nd connection port 14 3rd connection port 15 Inside Space 16 First reduced diameter portion 17 Intermediate portion 18 Second reduced diameter portion 19 Guide surfaces 21, 38 Top surface 22 Bottom surface 25 Main body 26 Bottom portions 31, 37, 41 Core 32, 42 Support portion 33 Columnar support 34, 44 Penetration part 43 Fan-like support body 81 Needleless tube body 81a Lumen 82 Tip part 83 Tip surface

Claims (13)

A connector pipe having at least two connection ports to which the pipe body can be connected, and an internal space communicating these connection ports;
A valve body having a first magnet and sealing the first connection port;
A connector comprising: a second magnet disposed in the internal space so as to repel the first magnet.   The connector according to claim 1, wherein the second magnet is embedded in a core disposed in the internal space.   The connector according to claim 2, wherein the core is arranged in a floating state in the internal space with a support portion that extends radially from a side surface to the internal space.   The connector according to claim 3, wherein the support portion includes at least one support body that extends radially from the side surface to the internal space, and at least one penetration portion that penetrates in the axial direction of the core.   The connector according to any one of claims 2 to 4, wherein the core is disposed with an axis different from the axis of the internal space.   The said valve body is a connector of any one of Claims 1-5 which has the side surface or annular seal part which closely_contact | adheres to the internal peripheral surface of a said 1st connection port.   The connector according to claim 1, wherein the valve body is a flat surface or a curved surface that bulges outward from the top surface exposed at the first connection port.   The connector according to claim 1, wherein the valve body is entirely made of an elastic material.   The at least one of the end part located in the said core side in the said valve body and the edge part located in the said valve body side in the said core inclines with respect to the axis line of a said 1st connection port. The connector according to any one of 2 to 8.   The connector according to claim 9, wherein the end portion of the valve body and the end portion of the core are both inclined in the same direction.   The valve body is in a sealed position that seals the first connection port by a repulsive force between the magnetic force of the first magnet and the magnetic force of the second magnet, and an open position that opens the first connection port. The connector according to claim 1, which can be transferred.   The connector according to claim 1, wherein the connector is an injection pipe including the connector pipe having the two connection ports.   The connector according to any one of claims 1 to 11, wherein the connector is a mixed injection pipe including the connector pipe having at least three connection ports.

Images