JP3203662U - connector - Google Patents

Abstract

A connector capable of directing a member to be connected in a desired direction when a member to be connected such as a syringe is connected to a male screw of a cap. A connector 1 includes a connector body 10 having a flow path through which liquid flows and a connection opening 19 connected to the flow path, a male screw 23 provided on the outer peripheral surface, and a connection for connecting a male connector at one end. A cap 11 provided with a cylindrical portion 21 in which a hole 24 is provided, the cap 11 being fixed to the connector body 10 and covering the connection opening 19; And positioning means 30 for positioning. [Selection] Figure 4

Description

  The present invention relates to a connector that is provided in, for example, an infusion line and can connect a male connector of a member to be connected such as various medical devices such as a syringe and other infusion lines.

  Conventionally, when performing infusion, blood transfusion, artificial dialysis, etc., liquids such as drug solution and blood are sent into the body through an infusion line equipped with a medical tube.

  In order to join liquids such as other chemicals to the liquid flowing in the tube, a connector having a connection hole for connecting a male connector is provided in the middle of the infusion line. For example, when another chemical solution is injected into the infusion line by a syringe, a male connector such as a luer provided on the syringe is inserted into the connection hole of the connector, and the syringe is connected to the infusion line.

  As such a connector, as shown in Patent Document 1, for example, a lock connector type having a cylindrical portion having a male screw on the outer peripheral surface and a connecting hole for connecting a male connector at the tip of the cylindrical portion. It has been known. In the lock connector type connector, the corresponding syringe is integrally provided with a female screw. And by connecting the female screw provided in the syringe to the male screw of the cap, the syringe can be fixed to the connector, and the male connector can be securely held in the connection hole.

JP 2009-11820 A

  However, since the conventional connector has a structure in which a cylindrical portion having a male screw is provided on the cap and the cap is fixed to the connector main body having the flow path, the fixing direction of the cap with respect to the connector main body varies. It was.

  Therefore, depending on the connector, there is a variation in the rotational direction position of the screw thread start end of the male thread of the cap with respect to the connection part of the connector body, and when the syringe is fixed to the connector, the scale of the syringe faces a direction that is difficult to see, It was sometimes difficult to operate.

  An object of the present invention is to solve such problems of the prior art, and the object is to connect a connected member such as a syringe to the male screw of the cap. It is an object of the present invention to provide a connector capable of directing a member in a desired direction.

  The connector of the present invention is provided with a connector body having a flow path through which liquid flows and a connection opening connected to the flow path, a male screw on the outer peripheral surface, and a connection hole for connecting a male connector at one end. A cap that includes a cylindrical portion and is fixed to the connector main body and covers the connection opening; and a positioning means that positions the cap relative to the connector main body in a rotation direction about the axis of the cylindrical portion. It is characterized by having.

  In the above configuration, the positioning means includes a protrusion provided on one of the connector main body and the cap, and a recess provided on the other of the connector main body or the cap and engaged with the protrusion. Is preferred.

  In the above configuration, it is preferable that a circular fitting recess is provided in the connector body, a circular flange is provided in the cylindrical portion, and the flange is fitted into the fitting recess.

  In the above configuration, a protrusion projecting in the radial direction is provided on either the inner peripheral surface of the fitting recess or the outer peripheral surface of the flange portion, and the inner peripheral surface of the fitting recess or the outer peripheral surface of the flange portion is provided. It is preferable to provide a groove recessed in the radial direction in which the projection is engaged with either one of the other.

  In the said structure, it is preferable to have a pair of said processus | protrusion and a pair of said ditch | groove arrange | positioned point-symmetrically centering | focusing on the axial center of the said cylindrical part.

  In the above-described configuration, it is preferable that a valve body that is formed of an elastic body, closes the connection hole, and includes a slit on a pushing surface exposed from the connection hole is provided inside the cylindrical portion.

  According to the present invention, by providing positioning means for positioning the cap with respect to the connector main body in the rotation direction around the axis of the cylindrical portion, the screw thread start end of the male screw provided on the cap is connected to the connector main body. Since it is oriented in a predetermined direction with respect to the connection part of the main body, when the female screw provided integrally with the member to be connected is screwed to the male screw, and the member to be connected is fixed to the connector, The member can be oriented in a desired direction relative to the connector. Thereby, for example, when a syringe is fixed to the connector, the scale of the syringe is always directed to the near side so that the operation can be easily performed. In addition, when a mark for defining the tightening position is attached to the connected member and the connector main body, it is appropriate to screw the female screw of the connected member into the male screw of the connector until these marks match. The degree of tightening can be confirmed by visual observation so that the connecting operation of the connected member to the connector can be easily performed. In this way, the operation or handling of the connected member can be facilitated.

  Further, according to the present invention, the positioning means is constituted by the protrusion provided on either the connector main body or the cap and the recess provided on either the connector main body or the cap. Thus, the cap can be reliably positioned with respect to the connector body in the rotation direction around the axis of the cylindrical portion.

  Furthermore, according to the present invention, the connector body is provided with a circular fitting recess, the cylindrical portion is provided with a circular flange portion, and the flange portion is fitted into the fitting recess, so the male connector is connected to the cap. Sometimes, the radial load applied to the cap can be reliably supported by the connector body, and the durability of the connector can be enhanced.

  Furthermore, according to the present invention, a protrusion projecting in the radial direction is provided on either the inner peripheral surface of the fitting recess or the outer peripheral surface of the flange portion, and either the inner peripheral surface of the fitting recess or the outer peripheral surface of the flange portion is provided. On the other hand, a groove that is recessed in the radial direction to engage the protrusion is provided on the other side, so that when the male connector is connected to the cap, the load in the rotational direction applied to the cap is securely supported by the connector body. The durability of the connection between the cap and the connector body can be enhanced.

  Furthermore, according to the present invention, since the pair of protrusions and the pair of concave grooves arranged symmetrically with respect to the axis of the cylindrical portion are provided, the cap is fixed to the connector body in two directions. The fixing work can be facilitated as possible.

  Furthermore, according to the present invention, the male connector is provided with a valve body that is formed of an elastic body inside the cylindrical portion, closes the connection hole, and has a slit on the pushing surface exposed from the connection hole. In a state where the male connector is connected, the connection hole can be reliably closed in a liquid-tight manner while the connection hole is reliably closed.

It is a figure which shows the infusion line in which the connector which is one embodiment of this invention is used. It is a perspective view which shows the detail of the connector shown in FIG. It is sectional drawing of the connector shown in FIG. FIG. 3 is an exploded perspective view of the connector shown in FIG. 2. It is sectional drawing of the state to which the syringe of the connector was connected. It is a figure which shows the positional relationship of the screw thread start end of the external thread of a cap, and the connection part of a connector main body. It is a figure which shows the state of the syringe connected to the connector. It is a figure which shows the case where a positioning mark is attached | subjected to the connector and the syringe. (A), (b) is a figure which shows the modification of a positioning means, respectively.

  A connector 1 according to an embodiment of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, a connector 1 according to an embodiment of the present invention is provided in an infusion line 2. The infusion line 2 includes, for example, an infusion tube 3 for storing a liquid such as a drug solution and an infusion cylinder 5 and a clamp 6 between an indwelling needle 4 inserted into a patient's vein or the like, and these are medical tubes 7. Connected configuration. The connector 1 is provided on the infusion line 2 so that a member to be connected such as a syringe 8 can be connected to the infusion line 2.

  Although FIG. 1 shows the case where the syringe 8 is connected to the connector 1, not only the syringe 8 but also other medical devices such as an artificial dialysis apparatus, other infusion lines, extension tubes, etc. are connected to the connector 1. You can also.

  As shown in FIGS. 2 and 3, the connector 1 includes a connector main body 10, also called a holder, and a cap 11 fixed to the connector main body 10.

  The connector main body 10 includes a main body portion 12 and a pair of connection portions 13 and 14 formed in a substantially cylindrical shape. The main body portion 12 and the connection portions 13 and 14 can be integrally formed by, for example, injection molding of a resin material, but can also be formed by various metal materials, glass materials, ceramic materials, and the like.

  Each of the connection portions 13 and 14 is formed in a cylindrical shape and protrudes from the outer peripheral surface of the main body portion 12 toward the radially outer side. The axial center of the connecting portion 13 and the axial center of the connecting portion 14 coincide with each other, and these axial centers also coincide with the radial direction of the main body portion 12. The open end of one connecting portion 13 is an inflow port 15, and the open end of the other connecting portion 14 is an outflow port 16. Accordingly, one connector 13 is inserted into the tube 7 on the infusion bag 3 side of the infusion line 2, and the other connector 14 is inserted into the tube 7 on the indwelling needle 4 side of the infusion line 2, thereby connecting the connector 1 to the infusion line. 2 can be connected. In addition, the opening end of one connection part 13 can be used as the outflow port 16, and the opening end of the other connection part 14 can also be used as the inflow port 15.

  As shown in FIG. 3, a flow path 17 extending from the inlet 15 of the connecting portion 13 to the outlet 16 of the connecting portion 14 is provided inside the connector main body 10. That is, the flow path 17 is provided in the connector main body 10 so as to extend along the radial direction of the main body portion 12 and communicates with the inflow port 15 and the outflow port 16.

  As shown in FIGS. 3 and 4, a fitting recess 18 is provided on the upper surface 12 a which is one end side in the axial direction of the main body 12. The fitting recess 18 is formed in a circular shape coaxial with the main body 12, and is recessed toward the inner side in the axial direction with respect to the upper surface 12 a of the main body 12. A connection opening 19 is opened in the bottom surface 18 a of the fitting recess 18. The connection opening 19 is formed in a circular shape coaxial with the main body 12 and the fitting recess 18, and is connected to an intermediate portion of the flow path 17 of the main body 12. The main body portion 12 is integrally provided with a convex portion 20 projecting from the bottom surface side of the flow path 17 toward the connection opening 19, and the convex portion 20 causes the flow path 17 to crank toward the connection opening 19. It is bent into a shape.

  The cap 11 includes a cylindrical portion 21 and a flange portion 22. The cylindrical portion 21 and the flange portion 22 are integrally formed by, for example, injection molding of a resin material, but can be formed of other materials as with the connector main body 10.

  A male screw 23 is provided on the outer periphery of the cylindrical portion 21. The male screw 23 is a double thread having a shape defined by International Standards Organization standard numbers ISO 594-1 and ISO 594-2, and is screwed into the female screw of the lock connector provided in the medical syringe 8 or the like. Can be combined.

  The cylindrical portion 21 is integrally provided with an end surface 21a perpendicular to the axial direction at the tip, and a connecting hole 24 for connecting a male connector is provided at the axial center of the end surface 21a.

  The flange portion 22 is integrally provided at the base end of the cylindrical portion 21 and is formed in a circular shape that protrudes radially outward with respect to the cylindrical portion 21. The outer diameter of the flange portion 22 is set to be substantially the same as the inner diameter of the fitting recess 18 of the connector body 10. The cap 11 is fixed to the connector main body 10 by fitting the flange portion 22 into the fitting recess 18 and welding them together by ultrasonic welding (fusion). The connection opening 19 is covered with the cap 11 by fixing the cap 11 to the connector body 10.

  The cap 11 is not limited to ultrasonic welding, but can be fixed to the connector main body 10 using other fixing means such as an adhesive or press-fitting.

  As shown in FIG. 3, a valve body 25 is mounted inside the cylindrical portion 21. The valve body 25 includes, for example, a valve body portion 25a formed in a cylindrical shape by an elastic body such as a rubber material or a thermoplastic elastomer, and a held portion integrally provided over the entire circumference of the valve body portion 25a. 25b. A cylindrical insert 26 having a smaller diameter than the cylindrical portion 21 is fitted inside the cylindrical portion 21 of the cap 11, and the held portion 25 b is sandwiched between the insert 26 and the end surface 21 a of the cylindrical portion 21. Therefore, the valve body 25 is fixed inside the cylindrical portion 21. The valve main body 25 a is fitted inside the connection hole 24, and the pushing surface 25 c on one end side in the axial direction (upper side in FIG. 3) is flush with the end surface 21 a of the cylindrical portion 21 from the connection hole 24. Exposed outside. Further, the connection hole 24 is closed by the valve body 25 by fitting the valve body 25 a of the valve body 25. The pushing surface 25c of the valve body 25a is provided with a linear slit 25d for pushing the male connector.

  As shown in FIG. 3, in a state where the male connector provided in the syringe 8 or the like is not connected to the connector 1, the flow path 17 of the connector main body 10 has the valve body 25 in which the connection opening 19 is provided in the cap 11. It is blocked by. Accordingly, the connector 1 can cause the liquid flowing in from the infusion line 2 to flow out of the outlet 16 through the inside of the flow path 17.

  On the other hand, by inserting a male connector provided on a connected member such as the syringe 8 into the connector 1, the connected member can be connected to the infusion line 2 via the connector 1. FIG. 5 shows a state where the syringe 8 shown in FIG. 1 is connected to the connector 1.

  As shown in FIG. 5, the syringe 8 has a male connector (luer) 27 having a shape defined by standard numbers ISO 594-1 and ISO 594-2 by the International Organization for Standardization at the tip thereof. A cylindrical tube portion 28 that covers the outside of the male connector 27 is integrally provided at the tip of the syringe 8, and the inner peripheral surface of the tube portion 28 has a shape corresponding to the male screw 23 of the cap 11. A female screw 29 is integrally provided. The shape of the female screw 29 is also defined by standard numbers ISO 594-1 and ISO 594-2 by the International Organization for Standardization. The cylindrical part 28 provided with the syringe 8, the male connector 27, and the internal thread 29 is integrally formed, for example by injection molding of the resin material.

  By pushing the male connector 27 of the syringe 8 toward the slit 25d of the valve body 25, the valve body 25 is elastically deformed toward the inside of the cap 11, and the male connector 27 of the syringe 8 is connected to the flow path 17 in a liquid-tight manner. can do. At this time, the female screw 29 provided on the inner peripheral surface of the cylindrical portion 28 of the syringe 8 is screw-coupled to the male screw 23 of the cap 11, thereby fixing the syringe 8 to the connector 1 and the flow of the male connector 27. Connection to the path 17 can be maintained.

  FIG. 6 is a view showing the positional relationship between the thread start end S of the male screw 23 of the cap 11 and the connecting portions 13 and 14 of the connector main body 10.

  In the present invention, the positioning means 30 for positioning the cap 11 with respect to the connector main body 10 in the rotation direction around the axis of the cylindrical portion 21 is provided. As a result, as shown in FIG. 6, the screw thread start end S of the male screw 23 provided on the cap 11 is directed in a predetermined direction with respect to the connection portions 13 and 14 of the connector body 10.

  In the present embodiment, the positioning means 30 includes a pair of protrusions 31 and a pair of concave grooves (recesses) 32.

  As shown in FIG. 4, the pair of protrusions 31 are integrally provided on the outer peripheral surface of the flange portion 22 of the cap 11. Each protrusion 31 protrudes radially outward from the outer peripheral surface of the flange portion 22 and is point-symmetric with respect to each other about the axis of the cylindrical portion 21, that is, circumferentially with respect to the axis of the cylindrical portion 21. They are offset by 180 degrees. Each protrusion 31 is formed in a trapezoidal shape whose circumferential width gradually decreases from the radially inner side to the outer side.

  The pair of concave grooves 32 are respectively provided on the inner peripheral surface of the fitting concave portion 18 of the connector main body 10. Each of the recessed grooves 32 is recessed from the inner peripheral surface of the fitting recessed portion 18 toward the radially outer side, and the upper side in the axial direction is open to the upper surface 12a of the main body portion 12 of the connector body. The pair of concave grooves 32 is formed in a trapezoidal shape corresponding to the protrusion 31. Similarly to the protrusion 31, the pair of concave grooves 32 are also arranged symmetrically about the axis of the cylindrical portion 21, that is, shifted by 180 degrees in the circumferential direction with respect to the axial center of the cylindrical portion 21.

  The cap 11 is fixed to the connector main body 10 with one projection 31 engaged with one concave groove 32 and the other projection 31 engaged with the other concave groove 32. Thereby, the cap 11 can be positioned with respect to the connector main body 10 in the rotation direction around the axis of the cylindrical portion 21. Since the positional relationship between the protrusion 31 provided on the flange portion 22 of the cap 11 and the thread start end S of the male screw 23 provided on the cylindrical portion 21 is determined, when the cap 11 is fixed to the connector main body 10, FIG. As shown, the screw thread start end S of the male screw 23 provided on the cap 11 is directed in a predetermined direction D around the axis of the cylindrical portion 21 with respect to the connection portions 13 and 14 of the connector body 10.

  Since the male screw 23 is configured as a double thread, even if the cap 11 is rotated 180 degrees with respect to the connector main body 10 and fixed from the state shown in FIG. 6, the thread of the male screw 23 provided on the cap 11 The positional relationship of the start end S with respect to the connecting portions 13 and 14 of the connector main body 10 does not change. Therefore, even if the pair of protrusions 31 and the concave groove 32 are provided at a point-symmetrical position in the rotational direction about the axis of the cylindrical portion 21, the screw thread start end S of the male screw 23 provided on the cap 11 is provided. The connector body 10 can be directed in a predetermined direction D with respect to the connection portions 13 and 14.

  Therefore, when the female screw 29 provided integrally with the syringe 8 is screwed to the male screw 23 of the cap 11 and the syringe 8 is fixed to the connector 1, the scale of the syringe 8 fixed to the connector 1 is On the other hand, it can be made to face a certain direction. For example, as shown in FIG. 7, when the connector 1 of the present invention is provided in the infusion line 2 that hangs down in the vertical direction, the male screw is arranged so that the scale of the syringe 8 fixed to the connector 1 is always directed to the front side. It is possible to set the screw thread start end S and the positions of the protrusions 31 and the grooves 32. Thereby, when connected to the connector 1, the scale of the syringe 8 can be easily seen and the operation of the syringe 8 can be easily performed.

  Further, as shown in FIG. 8, for example, a mark 34 for defining a tightening position between the member to be connected 33 and the connector main body 10 with respect to the member to be connected 33 having no scale like the syringe 8. , 35, the appropriate tightening degree is visually confirmed by screwing the female thread of the connected member 33 to the male thread 23 of the connector 1 until these marks 34, 35 coincide with each other. The connection operation of the connected member 33 to the connector 1 can be easily performed.

FIGS. 9A and 9B are diagrams showing modifications of the positioning means.
The positioning means 30 is not limited to the configuration in which two protrusions 31 and two concave grooves 32 are provided, and the position of the thread start end S of the male screw 23 with respect to each connection portion 13, 14 of the connector body 10 is always the same position. As shown in FIG. 9 (a), at least one protrusion 31 and a concave groove 32 may be provided as long as the cap 11 can be positioned on the connector body 10 as described above. It doesn't matter.

  Moreover, not only the structure which provides the protrusion 31 in the flange part 22 of the cap 11 and provides the recessed groove 32 in the fitting recessed part 18 of the connector main body 10, but as shown in FIG.9 (b), the flange part 22 of the cap 11 is provided. It is also possible to provide a configuration in which the concave groove 32 is provided and the protrusion 31 is provided in the fitting concave portion 18 of the connector body 10. Even in this case, the cap 11 can be positioned on the connector main body 10 so that the position of the thread start end S of the male screw 23 with respect to each connection portion 13, 14 of the connector main body 10 is always the same position. If so, an arbitrary number of protrusions 31 and concave grooves 32 can be provided.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the embodiment, the positioning means 30 is provided with the trapezoidal protrusion 31 on the outer peripheral surface of the flange portion 22 of the cap 11 and the trapezoidal concave portion on the inner peripheral surface of the fitting recess 18 of the connector body 10. The groove 32 is provided. However, the present invention is not limited to this, and the connector main body 10 is not limited as long as the cap 11 can be positioned with respect to the connector main body 10 in the rotational direction around the axis of the cylindrical portion 21. And the protrusion 31 and the groove 32 can be provided in the other place of the cap 11. Moreover, the shape of the protrusion 31 and the groove 32 can also be set arbitrarily.

  Moreover, in the said embodiment, although the valve body 25 formed with the elastic body is mounted | worn with the cap 11, it is not restricted to this, For example, when the connector 1 is not used (at the time of non-connecting), A configuration in which the valve body 25 is not provided, such as a configuration in which an overcap is screwed to the male screw 23 to close the connection hole 24, may be employed. Further, as the valve body 25, for example, a valve body having another configuration such as a bellows shape that is deformed in the axial direction to open the passage may be used.

  Furthermore, in the said embodiment, although the case where the syringe 8 is connected to the connector 1 is illustrated, to-be-connected members, such as another medical device and another infusion line, can also be connected to the connector 1. .

DESCRIPTION OF SYMBOLS 1 Connector 2 Infusion line 3 Infusion bag 4 Indwelling needle 5 Infusion cylinder 6 Clenme 7 Tube 8 Syringe 10 Connector main body 11 Cap 12 Main body part 12a Upper surface 13,14 Connection part 15 Inlet 16 Outlet 17 Flow path 18 Fitting recessed part 18a Bottom DESCRIPTION OF SYMBOLS 19 Connection opening 20 Convex part 21 Cylindrical part 21a End surface 22 Flange part 23 Male screw 24 Connection hole 25 Valve body 25a Valve body part 25b Supported part 25c Push surface 25d Slit 26 Insertion body 27 Male connector 28 Cylindrical part 29 Female screw 30 Positioning Means 31 Projection 32 Groove (concave)
33 Connected member 34, 35 Mark S Thread start end

Claims (6)

A connector body comprising a flow path through which liquid flows and a connection opening connected to the flow path;
A cap provided with a male screw on one end and a connection hole for connecting a male connector at one end, and a cap fixed to the connector body and covering the connection opening;
Positioning means for positioning the cap with respect to the connector main body in a rotation direction centering on an axis of the cylindrical portion.   The positioning means includes a protrusion provided on one of the connector main body and the cap, and a concave portion provided on either the connector main body or the cap and engaged with the protrusion. Item 10. The connector according to Item 1.   The connector according to claim 1, wherein a circular fitting recess is provided in the connector body, a circular flange is provided in the cylindrical portion, and the flange is fitted into the fitting recess.   Protrusions projecting in the radial direction are provided on either the inner peripheral surface of the fitting recess or the outer peripheral surface of the flange portion, and either the inner peripheral surface of the fitting recess or the outer peripheral surface of the flange portion The connector according to claim 3, wherein a concave groove that is recessed in a radial direction with which the protrusion is engaged is provided.   5. The connector according to claim 4, comprising a pair of the protrusions and a pair of the concave grooves arranged symmetrically with respect to an axis of the cylindrical portion.   2. The connector according to claim 1, wherein a valve body that is formed of an elastic body, closes the connection hole, and includes a slit on a pushing surface exposed from the connection hole is provided inside the cylindrical portion.

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