JP2011183113A - Flow channel connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flow channel connector which can be quickly and easily mounted on a cylinder shape aperture. <P>SOLUTION: The flow channel connector includes a connecting cap 30 fixed to an aperture edge part of a cylinder shape aperture part t1, a seal valve 20 supported by the connecting cap 30, and a seal releasing member 40 retained between the connecting cap 30 and the seal valve 20. The seal valve 20 includes a projection 23 projecting from an elastic deformation part 21 having a valve hole 22 formed and a ring shape support part 24. The connecting cap 30 includes a press part 32 to clamp the support part 24 of the seal valve 20, a retaining part 33 to retain the seal valve 20, and a sleeve 34 to accept the insertion of a duct part s2. In the seal valve 20, the valve hole 22 is opened by deformation of the elastic deformation part 21 by the projection 23 pressed by the seal releasing member 40. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a flow path connector for communicating a liquid supply / discharge conduit portion with a tubular mouth portion such as a pipe, a mixed injection tube, or a container, and in particular, has an inner flange portion protruding from the inner peripheral surface of the mouth portion. The present invention relates to a connector attached to a cylindrical mouth portion.

  For example, infusion pipes used for infusion of medicinal liquids and artificial dialysis, mixed injection pipes are attached in the middle of the pipes in order to extract infusion liquids and mix medicinal liquids. The mixed injection pipe consists of a main flow path that connects the upstream and downstream sides of the pipe and a mixed injection pipe body that has a branch passage that communicates with the main flow path, and a seal section that seals the branch passage and allows external communication if necessary. The liquid and blood are injected and extracted from the main flow path through the branch path by the communication of the seal portion.

  Injection and extraction at the branch path may be performed by inserting a syringe needle into the rubber stopper at the opening of the main body of the mixed injection tube, but there are problems such as cost of the syringe needle and management after use. Various connection structures have been proposed in which the conduit portion at the tip of the syringe is directly inserted into the opening portion of the drug solution bottle or the mixed injection tube main body without attaching the connector.

  For example, in the case of using a tube with a threaded collar around the conduit portion (thin diameter portion) at the tip, such as a twist lock type syringe, the connection structure described in Patent Literature 1 and Patent Literature 2 is used. Applicant has proposed.

  As shown in FIG. 15, the syringe connector (flow channel connector) described in Patent Document 1 is provided in a branching cylindrical mouth t <b> 1 provided on the side wall of the mixed injection tube main body T. An inner flange portion t3 projects from the inner peripheral surface of the cylindrical mouth portion t1, and an opening portion t2 is formed at the center thereof. The rubber seal valve 104 provided in the syringe connector has a valve hole 103 that is normally closed at the center, and is placed inside the cylindrical mouth t1 to cover the opening t2. The cap member 105 is attached so as to cover the cylindrical mouth portion t1. The cap member 105 is provided with a sleeve 107 erected at the center and into which the conduit portion s2 at the distal end of the syringe can be inserted, and the seal release member 108 is slidably accommodated in the sleeve. The seal release member 108 includes an insertion portion 109 to be inserted into the valve hole 103 of the seal valve 104, a connection portion 110 to which the conduit portion s2 of the syringe S is connected, and an opening 111 from the connection portion 110 to the insertion portion 109. Have.

  As shown in FIG. 16, the syringe connector 100 includes a conduit portion of the syringe S when the female screw portion s3 of the collar s1 of the twist lock type syringe S is screwed into the screwing piece 112 of the sleeve 107. The connecting portion 110 of the seal release member 108 is connected to s2, and the valve hole 103 of the seal valve 104 is pushed open by the insertion portion 109 of the seal release member 108 so that the mixed injection tube main body T and the flow path of the syringe S are communicated. In addition, when the syringe S is pulled out of the sleeve 107 of the cap member 105, the syringe connector 100 is configured such that the opening t2 of the mixed injection tube main body T is sealed by the elastic valve 104 as shown in FIG. Restore the closed state.

  The syringe connector described in Patent Document 2 has substantially the same structure as this, but the seal valve 20 has a convex hemispherical shape on the syringe connection side, and a valve hole is formed at the top. The top of the seal valve 20 is pushed down with the insertion of the conduit portion of the syringe, so that the valve hole is opened.

Japanese Patent No. 3922914 Japanese Patent No. 4000125

  In any of the above syringe connector, the seal valve 104 is housed inside the cylindrical mouth portion t1 of the mixed injection tube main body T, and the cap member 105 is attached so as to cover the tubular mouth portion t1. A seal release member 108 is accommodated in the sleeve 107. Therefore, when the syringe connector is attached to the mixed injection tube body, it is necessary to attach the seal valve 104, the cap member 105, and the seal release member 108 to the mixed injection tube body one by one, which is extremely inconvenient. In particular, the outer diameters of these members, for example, the seal valve 104, the cap member 105, and the seal release member 108 are as small as about 10 mm, about 20 mm, and about 5 mm, respectively. Therefore, when the assembly is performed manually, it is necessary to accurately perform a fine work, and also when the assembly is performed by an automatic device, it is necessary to hold and position the minute member accurately. In any case, the handling is required to be simple and quick, but this cannot be fully met.

  The same problem occurs not only when connecting a connector to the main body of a mixed injection tube and communicating the conduit part of the syringe, but also when connecting a connector to the cylindrical mouth of a container such as a drug solution bottle or an infusion bag, This also occurs in the case where the flow path is formed by communicating the liquid supply / discharge conduit portion other than the syringe with the device.

  Accordingly, an object of the present invention is to provide a flow path connector that can be quickly and easily attached to a cylindrical mouth portion.

  In order to achieve the above-mentioned object, the present invention is provided for connecting a liquid supply / discharge conduit portion to a cylindrical mouth portion by attaching it to a cylindrical mouth portion having an inner flange portion projecting from the inner peripheral surface of the mouth portion. A connection cap, which is a flow path connector, and is fixed over the opening edge of the cylindrical mouth, a seal valve supported on the cylindrical mouth mounting side of the connection cap 30, and the connection A seal release member that is held between the connection cap and the seal valve on the conduit portion mounting side of the cap for the seal, the seal valve being elastically deformable, and a central portion of the elastic deformable portion A valve hole that is normally elastically closed, a protrusion that projects from the outer periphery of the elastically deforming portion to the outside in the elastically deforming portion, and a protrusion that projects from the outer periphery of the elastically deforming portion. Extending over the inner flange of the cylindrical mouth An annular support portion, and the connection cap sandwiches the support portion of the seal valve between an engaging portion that engages with the cylindrical mouth portion and an inner flange portion of the cylindrical mouth portion. An annular pressing portion, a holding portion that holds the seal valve, and a sleeve that rises from a radial center portion of the pressing portion to the conduit portion mounting side and receives the insertion of the conduit portion, and the seal release member is An annular wall in contact with the inner peripheral surface of the sleeve of the connection cap, and an abutting portion in contact with the protrusion of the seal valve, and is slidable along the inner peripheral surface of the sleeve. The protruding stepped portion is prevented from coming off to the conduit portion mounting side, and is pushed and moved in contact with the conduit portion when the conduit portion is inserted, and the seal valve is pushed against the conduit portion. The protrusion by the seal release member being moved By being pressed, the valve hole the elastic deformation portion is deformed and provides a flow path connector, characterized in that opening.

  When the flow path connector according to the present invention is attached to a cylindrical mouth portion such as a pipe or a container, the connection cap covers the opening edge of the cylindrical mouth portion and is fixed by a locking portion, and the seal valve Is supported on the cylindrical mouth mounting side of the connection cap, and the seal release member is held between the connection cap and the seal valve. In order to obtain this mounting state, the connection cap has an annular pressing portion, the seal valve has an annular support portion, and the seal valve is sandwiched between the inner flange portion of the cylindrical mouth portion and the connection cap. It has come to be. In addition, the connection cap includes a sleeve erected from the radial center of the pressing portion to the conduit portion mounting side, and the seal release member is prevented from coming off to the conduit portion mounting side by a stepped portion projecting to the inner peripheral surface of the sleeve. Has been.

  Therefore, when the flow path connector is attached to the cylindrical mouth portion, first, the seal release member is inserted into the sleeve of the connection cap, and the support portion of the seal valve is brought into contact with the pressing portion of the connection cap. In this state, the seal valve is held on the connecting cap by the holding portion. Thereby, the flow path connector in a state where the connection cap, the seal release member, and the seal valve are combined is completed. Part of the flow path connector in this combined state does not fall off, regardless of whether it is up, down, left, or right. And if the latching | locking part of the cap for a connection is latched to a cylindrical opening part, the whole flow-path connection tool will be mounted | worn with respect to a cylindrical opening part. Therefore, the mounting to the cylindrical mouth portion can be performed very quickly and easily.

  The connection cap includes a sleeve that receives the insertion of the conduit portion, the seal valve includes a protrusion that protrudes to the side opposite to the inner flange portion so as to surround the valve hole in the elastic deformation portion, and the seal release member is a seal A contact portion that contacts the protrusion of the valve is provided, and the contact portion is pushed and moved in contact with the conduit portion inserted into the sleeve. And as for a seal valve, when a projection is pressed by the seal release member pushed and moved, an elastic deformation part changes and a valve hole opens. In this way, the valve hole of the seal valve opens when the protrusion is pressed by the seal release member, so the member inserted to open the valve hole (for example, the insertion portion 109 in FIGS. 15 and 16) Even if such an insertion member is provided, the force with which the insertion member pushes the valve hole 22 is small. Therefore, the problem that the insertion member damages the valve hole portion or requires a large force when the insertion member is removed from the valve hole does not occur.

  Thus, the function of opening the valve hole based on the deformation of the elastic deformation portion when the seal valve is pressed against the protrusion is that the protrusion is provided in the elastic deformation portion, and the annular support portion is the outer periphery of the elastic deformation portion. This is based on a configuration provided so as to extend radially outward from the portion. Further, with this configuration, liquid-tightness due to the support portion being sandwiched between the inner flange portion and the pressing portion and high degree of freedom of deformation of the elastically deformable portion can be reliably obtained.

  As described above, according to the present invention, it is possible to provide a flow path connector that can be quickly and easily attached to the cylindrical mouth portion.

It is a vertical front view which shows the state which mounted | wore the mixed injection pipe main body with the flow-path connection tool which concerns on the 1st Embodiment of this invention. It is a vertical side view of the flow-path connection tool of FIG. It is a longitudinal front view which shows the state by which the conduit part was connected to the flow-path connection tool of FIG. It is a vertical front view which shows the state which mounted | wore the mixed injection pipe main body with the flow-path connection tool which concerns on the 2nd Embodiment of this invention. It is a vertical front view which shows the state by which the conduit part was connected to the flow-path connection tool of FIG. It is a vertical front view which shows the state which mounted | wore the mixed injection pipe main body with the flow-path connection tool which concerns on the 3rd Embodiment of this invention. It is a vertical front view which shows the state which mounted | wore the mixed injection pipe main body with the flow-path connection tool which concerns on the 4th Embodiment of this invention. It is the longitudinal cross-sectional view and bottom view which show the seal release member in embodiment of FIG. It is a vertical front view which shows the modification of the flow-path connection tool of FIG. It is a vertical front view which shows the other modification of the flow-path connection tool of FIG. It is a vertical front view which shows the state which mounted | wore the mixed injection pipe main body with the flow-path connection tool which concerns on the 5th Embodiment of this invention. It is a vertical front view which shows the state by which the conduit part was connected to the flow-path connection tool of FIG. It is a vertical front view which shows the modification of the 5th Embodiment of this invention. It is a vertical front view which shows the state by which the conduit part was connected to the flow-path connection tool of FIG. It is a vertical front view which shows the state with which the conventional flow-path connection tool was mounted | worn with the mixed injection pipe main body. It is a longitudinal front view which shows the state by which the conduit part was connected to the flow-path connection tool of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same or similar parts in the drawings are denoted by the same reference numerals and description thereof is partially omitted.

  1 and 2 show a state in which the flow channel connector according to the first embodiment of the present invention is mounted on a mixed injection pipe body, FIG. 1 is a longitudinal front view, and FIG. 2 is a longitudinal side view.

  The co-injection pipe body T to which the flow path connector 1 is attached has a cylindrical shape as a whole, and pipes P1 and P2 (shown by alternate long and short dash lines) such as catheters are connected to both ends when used. A cylindrical mouth portion t1 having a short cylindrical shape larger in diameter than the mixed injection tube main body T is provided on the side wall. An inner flange portion t3 extends radially inward from the bottom inner peripheral surface of the cylindrical mouth portion t1, and is continuous with the side wall of the mixed injection tube main body T. An opening t2 is formed at the center of the inner flange portion t3, and serves as a branch port for the flow path of the mixed injection tube main body T.

  In this way, the flow channel connector 1 is mounted on the mixed injection tube main body T to form a mixed injection tube. If it demonstrates based on this mounting state, the flow-path connection tool 1 will be supported on the cylindrical mouth part mounting side of the connection cap 30 which covers and fixes the opening edge part of the cylindrical mouth part t1. And a seal release member 40 held between the connection cap 30 and the seal valve 20.

  The seal valve 20 includes an elastically deformable elastic portion 21 that is elastically deformable, a valve hole 22 that is formed at the center of the elastically deformable portion and is normally elastically closed, and a conduit that surrounds the valve hole 22 in the elastically deformable portion 21. A protrusion 23 projecting toward the portion mounting side, and an annular support portion 24 extending outward from the outer peripheral portion of the elastic deformation portion 21 and overlaid on the inner flange portion t3 of the tubular mouth portion t1. In this embodiment, the seal valve 20 is integrally formed of rubber as a whole, the elastic deformation portion 21 is hemispherical, and the valve hole is formed in a slit shape at the top of the elastic deformation portion 21. The protrusion 23 is formed in an annular shape surrounding the valve hole 22.

  The connection cap 30 includes an annular pressing portion 32 that holds the support portion of the seal valve 20 between an engaging portion 31 that engages with the cylindrical mouth portion t1 and an inner flange portion t3 of the tubular mouth portion t1. A holding portion 33 that holds the seal valve 20 and a sleeve 34 that erects from the central portion in the radial direction of the pressing portion 32 to the side opposite to the inner flange portion t3 and receives the insertion of the conduit portion s2. The locking portion 31 of the connection cap 30 includes an inner peripheral portion 311 that is in contact with the inner peripheral surface of the cylindrical mouth portion t1, an outer peripheral portion 312 that is in contact with the outer peripheral surface, and a coupling top portion 313 that couples the inner peripheral portion and the outer peripheral portion. And. At the time of mounting, the inner peripheral portion 311 and the outer peripheral portion 312 sandwich the cylindrical mouth portion t1 therebetween, whereby the connection cap 30 is fixed to the cylindrical mouth portion t1. On the outer peripheral surface of the sleeve 34, a male screw 341 is formed which is screwed into a female screw s3 provided on the collar s1 of the syringe S. The holding portion 33 is a cylindrical surface having a diameter that tightly receives the outer peripheral portion of the support portion 24 of the seal valve 20, and holds the support portion 24 inserted into the holding portion 33 by the tightening force.

  The seal release member 40 includes an annular wall 41 that contacts the inner peripheral surface of the sleeve of the connection cap 30 and a contact portion 42 that contacts the protrusion 23 of the seal valve 20. An opening 43 is formed at the center of the contact portion 42. Has been. Before the insertion of the conduit portion s2, a step portion 342 projecting radially inward is provided on the inner peripheral surface of the sleeve, and the seal release member is prevented from coming off by contact with the end portion of the annular wall 41. When the conduit portion s2 is inserted into the sleeve 34, the seal release member 40 is pushed and moved while the annular wall 41 contacts the conduit portion s2. In this embodiment, the seal release member 40 has a tapered inner surface 411 that decreases in diameter from the end of the annular wall 41 that contacts the stepped portion of the sleeve 34 toward the inner flange portion t3, and the tapered inner surface is a conduit. Liquid-tight contact with the outer peripheral surface s21 of the part s2.

  The seal valve 20 is configured such that the elastic deformation portion 21 is deformed and the valve hole 22 is opened when the projection 23 is pressed by the seal release member 40 that is pushed and moved by the conduit portion s2.

  This flow path connector 1 is used as follows. First, the seal release member 40 is inserted into the sleeve 34 of the connection cap 30, and the seal valve 20 is connected by the holding portion 33 in a state where the support portion 24 of the seal valve 20 is in contact with the pressing portion 32 of the connection cap 30. The cap 30 is held. The holding portion 33 holds the seal valve 20 by tightly receiving the outer peripheral portion of the support portion 24 of the seal valve 20. Thereby, it becomes a flow path connector in the state where the connection cap, the seal release member, and the seal valve are combined.

  And the latching | locking part 31 of the cap 30 for a connection is latched to the cylindrical opening part t1. This can be performed by inserting and sandwiching the cylindrical mouth portion t1 between the inner peripheral portion 311 and the outer peripheral portion 312 of the locking portion 31. Thus, the mounting state shown in FIGS. 1 and 2 is obtained, and the mounting is extremely quick and easy.

  In order to connect the conduit portion s2 of the syringe S to the attached flow path connector 1, the conduit portion s2 is inserted into the sleeve 34 as shown in FIG. What is necessary is just to screw s3 in the external thread 341 of the sleeve 34. FIG. Thereby, the front-end | tip part of the conduit | pipe part s2 is tightly inserted in the inner surface of the seal release member 40 annular wall 41. FIG. If the syringe S is further screwed in this state, the annular wall 41 is pushed and moved toward the inner flange portion, and the protrusion 23 is pressed to deform the elastic deformation portion 21. Along with this, the valve hole 22 is opened and is in communication with the flow path of the mixed injection tube main body T. In this state, liquid injection or extraction is performed from the syringe S to the pipes P1 and P2 through the mixed injection pipe body T as necessary.

  In order to prevent the liquid from leaking from between the conduit portion s2 and the seal release member 40 during the injection and extraction, the dimensions are determined so as to fit together in a liquid-tight manner. In particular, in this embodiment, the conduit portion s2 is fitted and held in the tapered portion of the inner peripheral surface of the annular wall 41 of the seal release member 40. When the seal release member 40 is pressed against the projection 23 of the seal valve 20 by the conduit portion s2 to open the valve hole 22, the projection 23 is deformed radially inward with the deformation of the elastic deformation portion 21. Along with this, a friction force directed radially inward is applied to the bottom surface of the seal release member 40. The seal release member 40 receives this frictional force and tries to deform in the radial direction and tightens the conduit portion s2. Thereby, the liquid tightness of the seal release member 40 and the conduit portion s2 becomes higher.

  It is desirable to form a gap between the projection 23 of the seal valve 20 and the inner peripheral surface of the sleeve 34 of the connection cap 30 at all times (when the conduit portion s2 is not inserted). This prevents the projection 23 from coming into contact with the inner peripheral surface of the sleeve 34 when the conduit portion s2 is removed from the state where the conduit portion s2 is inserted and coupled to the flow path connector 1, thereby ensuring the reliability of the operation. Even if a gap is formed between the inner peripheral surface of the sleeve 34 and the protrusion 23, the seal valve 20 is held by the connection cap 30 by the holding portion 33, so the connection cap 30, the seal release member 40, and the seal valve 20. The integrated assembly state is not impaired.

  FIG. 4 shows a flow path connector 1a according to the second embodiment of the present invention. This flow path connector 1 has the same basic form as the previous embodiment, and the shape of the seal valve 20a is different. That is, the seal valve 20a has an elastic deformation portion 21a extending in a flat plate shape, and a projection 23 is provided on the flat surface. A concave portion 26 is formed on the inner flange portion t3 side of the seal valve 20 so as not to narrow the flow path of the mixed injection tube main body T during deformation.

  This flow path connector 1 can also be used similarly to the previous embodiment. FIG. 5 shows a state in which the syringe S is connected and the conduit portion s2 is inserted into the seal release member 40. In this state, the valve hole 22 is opened, and the flow path of the mixed injection tube main body T communicates with the syringe S. In this embodiment, since the seal valve 20 has a flat plate shape, the valve hole 22 is opened even if the amount of deformation in the thickness direction is small.

  FIG. 6 shows a flow path connector 1b according to a third embodiment of the present invention. In the flow path connector 1 b, the seal release member 40 b includes a soft ring 45 at the end of the annular wall 41 that contacts the step 342 of the sleeve 34. As shown in FIG. 6, the soft ring 45 is in liquid-tight contact with the end face of the conduit portion s2 inserted when the syringe S is coupled. The soft ring 45 can be joined to the annular wall 41 by adhesion, heat fusion, or the like.

  In this embodiment, the distal end portion of the conduit portion s2 abuts against the soft ring 45 and pushes the seal release member 40, so that the conduit portion s2 is made smaller than when inserted into the inner peripheral surface of the annular wall 41. It is easy to remove.

  7 to 10 show various coupling forms of the annular wall 41 and the soft ring 45 with respect to the seal release member 40b having the same structure as that shown in FIG. FIG. 7 is a longitudinal front view of an example thereof, FIG. 8 shows the seal releasing member 40b taken out, (a) is a longitudinal sectional view and a bottom view of the soft ring 45, and (b) is an annular wall 41. It is a longitudinal cross-sectional view and a bottom view. In this example, two through holes 411 are formed in the annular wall 41, and the soft ring 45 is provided with a projecting piece 451 at a position corresponding to this, and the two are fitted and coupled. The projecting piece 451 has a tip portion slightly larger in diameter than the base end portion, and the through hole 411 has a lower portion slightly larger in diameter than the upper portion corresponding thereto. This ensures that the fitting is retained.

  In FIG. 9, an annular recess 412 is provided in the upper part of the annular wall 41, and the edge thereof has a slightly small diameter. The soft ring 45 is provided with an annular convex portion 452 at the edge corresponding to the concave portion 412. By fitting these concave portions 412 and convex portions 452, the coupling between the annular wall 41 and the soft ring 45 is ensured.

  In FIG. 10, an annular groove 413 is provided on the upper surface of the annular wall 41. The soft ring 45 is provided with an annular protrusion 453 on the lower surface corresponding to the groove 413. By fitting the grooves 413 and the protrusions 453, the connection between the annular wall 41 and the soft ring 45 is ensured. In addition to this fitting, adhesion or heat fusion can also be employed.

  11 and 12 show a flow path connector 1c according to a third embodiment of the present invention. FIG. 11 shows a state before the syringe S is coupled, and FIG. 12 shows a state after the syringe S is coupled. The basic form of the flow path connector 1c is the same as that of the first embodiment. Here, the seal release member 40 includes a pressing tube 46 protruding from the center of the bottom wall 47 of the annular wall 41 toward the inner flange portion t3. I have. The pressure tube 46 is normally located near the upper surface of the seal valve 20, and when the syringe S is coupled and the conduit portion s 2 is inserted, the pressure tube 46 is pushed and moved so that the tip of the pressure tube 46 extends around the periphery of the valve hole 22. Acts like a push. In this embodiment, the pressing tube 46 is inserted into the valve hole 22 at this time. Here again, the valve hole 22 is formed by the elastic member 21 being deformed and opened when the projection 23 is pressed against the seal release member 40 as in the first embodiment. Is added to this, the opening is performed more smoothly.

  Further, in the inserted state of the conduit portion s2, the tightening force indicated by the arrow f in FIG. If this tightening force is large, the seal release member 40c may remain in the valve hole 22 of the seal valve 20 when the conduit portion s2 is removed. However, in this embodiment, since the seal release member 40c presses the projection 23 of the seal valve 20, the tightening force f is weakened accordingly. Therefore, the seal release member 40c is prevented from remaining in the valve hole 22 of the seal valve 20 when the conduit portion s2 is removed.

  13 and 14 show a modification of the third embodiment. FIG. 13 shows a state before the syringe S is coupled, and FIG. 14 shows a state after the syringe S is coupled. The pressing tube 46 is always located near the upper surface of the seal valve 20. When the syringe S is connected and the conduit portion s2 is inserted, the distal end portion of the pressing tube 46 acts to push the periphery of the valve hole 22, but in this embodiment, it is not inserted into the valve hole 22 or slightly. It is only inserted in. Also in this embodiment, the pressing of the pressing tube 46 assists and the opening is smoother that the protrusion 23 is pressed against the seal release member 40 to deform the elastic deformation portion 21 and open the valve hole 22. To be done.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change is possible unless it deviates from the meaning. For example, the coupling with the conduit portion of the syringe or the like may be performed by friction coupling between the tapered portions. In this case, the outer peripheral surface of the sleeve 34 is a tapered smooth surface and is connected to the female screw of the collar s1 of the syringe S. There is no need to provide a male screw 341 to be screwed. Alternatively, the outer peripheral surface of the conduit portion of the syringe or the like and the inner peripheral surface of the sleeve can be frictionally coupled to each other. Further, it can be applied not only to a syringe but also to a cylindrical mouth portion such as a pipe, a mixed injection tube, or a container.

  The locking portion of the connection cap can take various forms such as a bayonet joint, in addition to the form that sandwiches the cylindrical mouth part. When providing a bayonet joint, one of the connection cap and the cylindrical mouth is provided with a partially cut annular protrusion, and the other is provided with an engagement protrusion that passes through the notch, By rotating the engaging protrusion through the notch and rotating in the circumferential direction, both the protrusions are engaged and fixed so as to be prevented from coming off.

  The holding portion of the connection cap can be in various forms in addition to the holding portion 33 having a cylindrical surface having a diameter for tightly receiving the outer peripheral portion of the support portion 24 of the seal valve 20. For example, FIG. As shown in the figure, it comprises a convex part 27 projecting from the support part 24 of the seal valve 20 to the conduit part mounting side, and a concave part 37 provided on the cylindrical mouth part mounting side of the holding part 32 of the connection cap 30, Both can be tightly fitted. In this case, the convex part 27 and the concave part 37 are arrange | positioned so that the elastic deformation part 21 may be enclosed, and it shall be formed in the cyclic | annular form or the some dot shape which was continuous or intermittent.

1, 1a, 1b, 1c: Flow path connector 20, 20a: Seal valve 21, 21a: Elastic deformation part 22: Valve hole 23: Protrusion 24: Support part 30: Connection cap 31: Locking part 32: Holding part 33: Holding part 34: Sleeve 40, 40b, 40c: Seal release member 41: Annular wall 42: Abutting part 45: Soft ring 46: Pressing pipe 342: Step part S: Syringe s2: Conduit part T: Mixed injection pipe main body t1 : Cylindrical mouth

Claims (5)

A flow path connector for connecting a liquid supply / discharge conduit part to the cylindrical mouth part by attaching to the cylindrical mouth part provided with an inner flange part projecting from the inner peripheral surface of the mouth part,
A cap for connection fixed over the opening edge of the cylindrical mouth,
A seal valve supported on the cylindrical mouth mounting side of the connection cap 30;
A seal release member held between the connection cap and the seal valve on the conduit part mounting side of the connection cap;
The seal valve includes an elastically deformable elastically deformable portion, a valve hole that is formed at a central portion of the elastically deformable portion and is normally elastically closed, and a conduit portion that surrounds the valve hole in the elastically deformable portion. A protrusion projecting toward the mounting side, and an annular support portion extending radially outward from the outer peripheral portion of the elastically deformable portion and overlaid on the inner flange portion of the cylindrical mouth portion,
The connection cap includes an engaging portion that engages with the cylindrical mouth portion, an annular pressing portion that sandwiches a support portion of the seal valve between an inner flange portion of the tubular mouth portion, and the seal A holding portion that holds the valve, and a sleeve that rises from the radial center of the pressing portion to the conduit portion mounting side and receives the insertion of the conduit portion,
The seal release member includes an annular wall in contact with the sleeve inner peripheral surface of the connection cap, and a contact portion in contact with the protrusion of the seal valve, and is slidable along the sleeve inner peripheral surface, A stepped portion projecting from the inner peripheral surface of the sleeve is prevented from coming off to the conduit portion mounting side, and is pushed and moved in contact with the conduit portion when the conduit portion is inserted.
The flow path connector according to claim 1, wherein the protrusion is pressed by the seal release member that is pushed and moved by the conduit portion, whereby the elastic deformation portion is deformed to open the valve hole.   The locking portion of the connection cap includes an inner peripheral portion in contact with the inner peripheral surface of the cylindrical mouth portion, an outer peripheral portion in contact with the outer peripheral surface, and a coupling top portion that couples the inner peripheral portion and the outer peripheral portion. The cylindrical mouth portion is sandwiched between an inner peripheral portion and an outer peripheral portion, and the inner peripheral portion includes a projecting ring portion extending to the inner flange portion side than the pressing portion, The flow path connector according to claim 1, wherein the holding part is formed by the protruding ring part that is fitted to an outer peripheral edge of the support part of the seal valve.   The seal release member has a tapered inner surface that decreases in diameter from the end of the annular wall that contacts the stepped portion of the sleeve toward the inner flange portion, and the tapered inner surface has liquid on the outer peripheral surface of the conduit portion. The flow path connector according to claim 1, wherein the flow path connector is in close contact.   3. The seal release member includes a soft ring at an end portion of the annular wall that abuts on a step portion of the sleeve, and the soft ring is in liquid-tight contact with an end surface of the conduit portion. The flow path connector according to 1.   The seal release member includes a bottom wall that covers an end of the annular wall on the inner flange portion side, and a pressing tube that protrudes from the center portion of the bottom wall toward the inner flange portion, 5. The flow path connector according to claim 1, wherein the seal release member is pushed and moved when the conduit portion is inserted, thereby pressing the peripheral portion of the valve hole of the seal valve.

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