JP2001079099A - Needle-free connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a structure preventing the opening of a valve body by the pressure of a container connecting a connector, capable of being inexpensively mass-produced and capable of certainly connecting a syringe. SOLUTION: A connector has a valve body 6 for closing a connector cylinder 10. The valve body 6 is equipped with an elastically stretchable part 14 for elastically pressing a valve main body 13 to the inner opening end part 28 of the connector cylinder 10 and the pressure part 15 pressed to the leading end of a syringe 12 in an unclosed state to open the valve main body 13. The valve main body 13 becomes an opened state in such a state that the syringe 12 is not inserted in the connector cylinder 10. When the syringe 12 is inserted in the connector cylinder 10, the pressure part 15 pushes the valve main body 13 to bring the same to an open state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a syringe in which a tube or a needle-free syringe tip is connected to an infusion container used for medical treatment, or a branch tube is connected in the middle of the tube connected to the infusion container. The present invention relates to a needleless connector used for co-injecting a drug solution in a medical device.

[0002]

2. Description of the Related Art FIG. 1 is a sectional view of a conventional needleless connector.
And FIG. In the connector shown in FIG. 1, the end of the port 1 is closed with a rubber stopper 2. The rubber stopper 2 is provided with a slit-shaped through hole 3 at the center. The slit-shaped through hole 3 is elastically closed by the rubber stopper 2. This connector is provided in the through hole 3 of the rubber stopper 2 with a male syringe adapter 37.
To be connected. Since the connector having this structure is inserted into the slit-shaped through-hole 3 and connected, the shape of the male syringe adapter inserted into the through-hole is specified, and it is difficult to insert a thick male syringe adapter.
This is because it is difficult to reliably close the through-hole without connecting the male syringe adapter in order to greatly elastically deform the slit-shaped through-hole. Further, in the connector having this structure, it becomes difficult to reliably prevent leakage from the slit-shaped through hole when the internal pressure of the container connecting the ports increases.

The connector shown in FIG. 2 has a feature that a thick syringe can be connected because a male luer or the like of a syringe is directly inserted into the port 1. In the connector of this structure, a rubber stopper 2 is provided at the tip of the port 1, a bellows 4 is connected to the rubber stopper 2, and a needle 5 is provided inside the bellows 4. When the male luer of the syringe is inserted, the bellows 4 is crushed and the rubber stopper 2 retreats,
A needle 5 is inserted through the rubber stopper 2 from the bellows 4 and connected to the male luer.

[0004] The connector of this structure also has a disadvantage that it is difficult to prevent leakage from the rubber stopper when the internal pressure of the container becomes high, and it is impossible to realize complete blockage, which is extremely important for the main connector. Further, the connector having this structure has a disadvantage that the structure is complicated and the manufacturing cost is high.

As a structure for solving such a disadvantage of the connector, as shown in FIG. 3, a structure in which a valve body is opened by an inserted syringe has been developed. The connector shown in this figure includes a rubber-like elastic valve element 6. The valve element 6 is
A ring-shaped collar portion 7 is pressed by a valve seat of the port 1 to close the valve, and an elastic leg 8 elastically presses the collar portion 7. In a state where the syringe 12 is not inserted into the port 1, as shown in FIG. 3, the elastic leg 8 presses the collar portion 7 against the valve seat 9, and the valve body 6 is closed. When the syringe 12 is inserted into the port 1, the valve body 6 is pushed down in the figure, and the collar portion 7 separates from the valve seat 9 to open the valve.

[0006]

In the connector shown in FIG. 3, when the internal pressure of the container increases, the collar portion is pressed against the valve seat by the internal pressure. Therefore, there is a feature that the valve can be reliably closed by the valve body when the syringe is not inserted. However, in the connector of this structure, it is difficult to arrange the valve body in a fixed position, and furthermore, it is necessary to incorporate the valve body in the middle of the port in the vertical direction. It is necessary to manufacture and connect this to incorporate a valve body. For this reason, there are disadvantages that it takes time and effort to manufacture, and when connecting with ultrasonic waves or an adhesive, dust is generated in the connecting step or management of the adhesive or the like is troublesome.

[0007] The present invention has been developed to solve such disadvantages of the conventional needleless connector. An important object of the present invention is to provide a needleless connector that can be easily, easily, and inexpensively mass-produced without opening a valve body due to pressure or the like, and that can reliably connect a syringe.

[0008]

SUMMARY OF THE INVENTION A needleless connector according to the present invention comprises a connector tube 10 having a flange 11 for hermetically closing an opening of a port 1 and a valve 6 for closing the connector tube 10 inside. . Syringe 1 on connector tube 10
When 2 is inserted, the valve 6 is opened. Further, in the connector of the present invention, the valve element 6 has the following unique configuration. (A) The valve body 6 is the inner open end 2 of the connector tube 10.
The valve body 13 which closes the connector tube 10 in close contact with the valve body 8
An elastic expansion / contraction section 14 for elastically pressing the valve body 13 against the inner opening end 28 of the cylinder; and a pressing section for pressing the syringe 12 to open the valve body 13 apart from the inner opening end 28. 15 is provided. (B) The pressing portion 15 is shaped so as not to close the tip of the syringe 12 when pressed by the syringe 12. (C) The elastic expansion / contraction part 14 has a communication opening 16 for communicating the connector tube 10 with the port 1 when the valve main body 13 is opened, and is elastic when the valve main body 13 is not pressed by the syringe 12. The valve body 13 is contracted to press the valve body 13 against the inner opening end 28 of the connector tube 10 to close the inner opening end 28 of the connector tube 10. Valve body 13
When the valve is pushed by the syringe 12 and separated from the inner opening end 28 to open the valve, the connector tube 10 communicates with the port 1 through the communication opening 16.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below illustrate a connector without a needle for embodying the technical idea of the present invention, and the present invention does not specify the connector as follows.

Further, in this specification, in order to make it easier to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as “claims” and “ In the column of “means”. However, the members described in the claims are not limited to the members of the embodiments.

As shown in FIG.
It is connected to an infusion container 22 or a branching tool 29 connected in the middle of a tube connected to the container. Infusion container 2
The connector connected to the second or branching tool 29 connects the tube by inserting the cylindrical syringe 12 or connects the tip of the syringe to the connector. The distal end of the syringe 12 is preferably connected in a luer-lock manner currently used. In the lure lock system, a syringe connected to a connector is rotated and connected in a locked state so as not to come off.

The connector is shown in FIGS. The connector shown in these figures includes a connector tube 10 having a port 1 connected to an infusion container or a branching tool, a flange 11 for hermetically closing an opening of the port 1, and a connector tube 1.
And a valve element 6 for closing the inside of the valve body 0.

FIG. 11 shows a state where the port 1 is connected to the infusion container 22. The port 1 is formed by molding a hard plastic into a cylindrical shape, and is hermetically welded and connected to the mouth of a plastic infusion container 22. The port 1 has a lower part connected to the infusion container 22, and a connector tube 10 at an opening at the upper end.
Are airtightly connected. The connector tube 10 hermetically connects a flange 11 provided on the outer periphery to the port 1. Tsuba 1
1 is hermetically connected to the port 1 via a packing 23. The packing 23 is formed in a ring shape,
Is fixed by fitting it into a fitting groove 19 provided in the opening. The port 1 has an outer ring 25 welded and fixed to the outside to provide the fitting groove 19. The outer ring 25 is formed by caulking the upper end into a U-curved shape, and holds the packing 23 inserted in the fitting groove 19 so as not to come off.

The packing 23 hermetically clamps the connector tube 10 and engages the ring portion 26 provided on the outer periphery with the fitting groove 19.
And is fixed. Furthermore, the packing 23 shown in the figure
Is provided with an inner ring 27 along the inner surface of the port 1 inside the ring portion 26. The port 1 is elastically sandwiched between the inner ring 27 and the ring portion 26 and connected to the port 1 with further improved airtightness.

The connector tube 10 has a flange 11 integrally formed of hard plastic. The connector tube 10 has a cylindrical shape, and its inner shape is substantially equal to the outer shape of the tip of the syringe 12 inserted therein. The connector tube 10 shown in FIG.
It is connected to. The connector tube 10 is closed by bringing the valve body 6 into close contact with the lower end.

The valve body 6 is in close contact with the inner opening end 28 of the connector tube 10 to close the connector tube 10, and the valve body 13 is elastically pressed against the inner opening end 28 of the tube. And a pressing portion 15 that presses the valve body 13 to open the valve. The pressing portion 15 is pressed by the tip of the syringe 12. The pressing portion 15 does not close the opening of the distal end of the syringe 12 in a state of contacting the distal end of the syringe 12.

In the valve body 6 shown in FIGS. 5 to 7, the valve body 13, the elastic expansion and contraction part 14, the packing 23 and the pressing part 15 are integrally formed of a rubber-like elastic body. The rubber-like elastic body is a natural rubber, a synthetic rubber (NBR, FPM, IR, etc.), a silicone rubber, a thermoplastic elastomer (EPDM, etc.), or the like.
The valve body integrally forming the packing is fixed at a fixed position of the port via the packing.

Although the above-described valve body has the pressing portion integrally formed, the pressing portion can be manufactured as a separate part from the valve body and the like as shown in FIGS. In the valve element 6 in this figure, a valve plate 15A is provided integrally below the pressing portion 15. The valve plate 15A is connected to the valve body 1
3 is a part of FIG. In the valve body 6 having this structure, the pressing portion is formed of a rubber-like elastic body or soft plastic capable of closing the inner opening end portion 28 of the connector tube 10 airtight at least assuredly. The elastic expansion and contraction portion is formed of a rubber-like elastic body that elastically pulls the valve main body 13 with a sufficiently strong force and makes close contact with the inner opening end 28 of the connector tube 10. Therefore, in the valve body in which the pressing portion is formed as a separate part, the pressing portion and the elastic expansion and contraction portion can be formed of a material most suitable for the application. Further, the pressing part, which is a separate part, can be connected to the valve body by bonding, welding, or fitting. Further, the pressing portion formed earlier can be inserted and fixed when forming the portion including the valve body. However, the pressing portion does not necessarily need to be connected to the valve body. This is because it can be inserted into the connector tube and arranged in a fixed position.

Further, it is not always necessary to form the pressing portion as a separate part, and the entirety of the pressing portion, the valve body, the elastic expansion and contraction portion, and the packing can be integrally formed of a rubber-like elastic body. Further, in a valve body in which the pressing portion is formed as a separate part from the valve body or the like, it is not always necessary to provide a valve plate in the pressing portion. This is because the valve body can airtightly close the inner open end of the connector tube. The pressing portion without the valve plate can be made of rigid or semi-rigid plastic or metal. in this case,
When the pressing portion 15 is pressed by the syringe 12, the pressing portion 15 is hardly deformed, and it is easy to secure the liquid passage. In this connector, a through hole through which the metal needle passes is provided in the pressing portion, and the syringe of the metal needle can be connected.

As shown in FIG. 5, the valve body 13 closes and closes the inner open end 28 of the connector tube 10 in a state where the syringe 12 is not inserted into the connector tube 10. The inner open end 28 of the connector tube 10 and the valve seat surface of the valve body 13 which is in close contact with the inner open end 28 are smooth surfaces. The valve body 13 is connected to the connector tube 10 by the elastic
Is elastically pressed by the inner opening end portion 28.

The elastic expandable portion 14 has a lower end connected to the valve body 13 and an upper end connected to the upper edge of the packing 23. The elastic expandable portion 14 has a communication opening 16. Communication opening 1
6 connects the connector tube 10 to the port 1 when the valve body 13 is opened. FIG.
FIG. In the valve body 6 in this figure, elastic expansion and contraction portions 14 are connected to both sides of the valve body 13, and a communication opening 16 is opened between the elastic expansion and contraction portions 14. Although the valve body 6 in the figure has two rows of elastic expansion and contraction parts 14 connected to the valve body 13, the number of elastic expansion and contraction parts can be three or more. Further, although not shown, the elastic expansion and contraction portion may be formed in a cylindrical shape connected to the entire circumference of the valve body. This elastic expansion / contraction part is provided with a through hole to form a communication opening.

As shown in FIG. 5, when the syringe is not inserted into the connector tube 10, the elastic expansion and contraction portion 14 contracts elastically to bring the valve body 13 into close contact with the inner opening end 28 of the connector tube 10. . In this state, the valve body 1
3 closes the inner open end 28 of the connector tube 10. As shown in FIG.
2 and the valve body 13 is pushed by the syringe 12,
The elastic expansion part 14 is extended. In this state, the valve body 13
Opens from the inner open end 28. At this time, the elastic expansion / contraction part 14 connects the connector tube 10 to the port 1 through the communication opening 16.

The pressing portion 15 shown in FIGS. 8 to 10 has a valve plate 15A at the lower end.
Are disposed inside the connector tube 10. The pressing portion 15 presses the valve body 13 without closing the tip of the syringe 12 inserted into the connector tube 10.
The pressing portion 15 in the figure has a cross convex portion 30 on the distal end surface that comes into contact with the syringe 12. The cross projection 30 shown in the drawing has a structure in which a concave portion is provided at the center, and the liquid flows more smoothly from the tip of the syringe. The pressing portion 15 presses the upper surface of the valve main body 13 with the valve plate 15A to open the valve main body 13. The cross projection 30 does not close the tip of the syringe 12 when pressed by the tip of the syringe 12.

Until the syringe is connected, the above connector is closed with a peel seal 20 that can peel off the outer opening end face 24 of the connector tube 10, as shown in FIG. The peel seal 20 is hermetically adhered to the connector tube 10 by heat welding, or hermetically adhered through an adhesive. The connector for thermally welding the peel seal 20 is as follows.
The peel seal 20 is formed of a thermoplastic plastic film, and the connector tube 10 is formed of thermoplastic plastic. The peel seal 20 closing the opening of the connector tube 10 prevents the inside of the connector from being stained or contaminated with bacteria before the syringe 12 is connected.

FIGS. 13 to 15 show a connector having another structure. In the connectors shown in these figures, the upper end of the elastic expandable portion 14 is fixed to the lower surface of the flange 11. Tsuba 11
Is a connecting groove 18 for connecting the upper end of the elastic elastic part 14.
On the lower surface. The valve body shown in FIG.
4, the flange 11 has two connecting grooves 18 that connect the upper ends of the two rows of elastically elastic portions 14. Tsuba 11
Is provided with two L-shaped pieces integrally formed on the lower surface, and two connection grooves 18 are provided between the L-shaped piece and the lower surface of the flange 11. Each of the L-shaped pieces is provided in such a manner that the leading end approaches the lower end of the connector tube 10 to reduce the width of the opening of the connecting groove 18. The connecting groove 18 has a feature that the elastic expansion and contraction portion 14 can be securely fixed.

As shown in FIG.
When the syringe is not inserted into the connector tube 10, the valve body 13 is elastically contracted and the valve body 13 is brought into close contact with the inner opening end 28 of the connector tube 10. In this state, the valve body 1
3 closes the inner open end 28 of the connector tube 10. As shown in FIG. 14, when the syringe 12 is inserted into the connector tube 10 and the valve body 13 is pushed by the syringe 12, the elastic expansion and contraction portion 14 is extended. In this state, the valve body 13
Opens from the inner open end 28. At this time, the elastic expansion / contraction part 14 connects the connector tube 10 to the port 1 through the communication opening 16.

The connector having this structure has a feature that the valve body 13 can close the connector tube 10 in an ideal state. This is because the upper end of the elastic expansion part 14 is fixed to the flange 11. The elastic expansion and contraction portion 14 having the upper end fixed to the flange 11 elastically pulls the valve body 13 and makes the valve body 13 adhere to the inner opening end portion 28 of the connector tube 10.

As shown in FIG. 16, the connector tube 10 may be provided with a plug 21 for integrally closing the outer opening end surface 24 of the connector tube 10 instead of the peel seal. The plug 21 is formed by being connected to the tip of the connector tube 10 so that the plug 21 can be cut and separated from the connector tube 10. In order to easily separate the plug 21, the boundary between the plug 21 and the connector tube 10 is formed thin.
Furthermore, the upper part of the plug 21 is provided with a knob so as to be easily picked by hand. In this connector, since the outer opening end face 24 is hermetically closed by the plug 21, contamination inside the connector tube 10 can be effectively prevented until the plug 21 is separated.

FIGS. 17 to 19 show a connector having another structure. The connectors shown in these figures also include a port 1 connected to an infusion container or a branching tool,
And a valve body 6 that closes the connector tube 10 inside.

The port 1 is formed by molding a rigid or semi-rigid plastic into a cylindrical shape, and is hermetically welded and connected to the mouth of a plastic infusion container. Port 1 has a lower part connected to the infusion container, and a connector tube 10 in the opening at the upper end.
Are integrally formed.

The connector tube 10 is formed integrally with the port 1 from a hard or semi-hard plastic. As shown in the sectional views of FIGS. 17 and 18, the connector tube 10 is provided with the connector tube 10 for connecting the syringe 12 by integral molding. The connector tube 10 has a cylindrical shape, and its inner shape is substantially equal to the outer shape of the syringe 12.

The valve body 6 is in close contact with the inner opening end 28 of the connector tube 10 to close the connector tube 10, and the valve body 13 is elastically pressed against the inner opening end 28 of the tube body. An elastic expansion and contraction portion 14, a pressing portion 15 that is pressed in a state where the tip of the syringe 12 is not closed to open the valve body 13 away from the inner opening end 28, and a valve body 6 that connects the valve body 6 to the connector tube 10. Fixed part 1 connected to
7 is provided. The illustrated valve element 6 includes a valve body 13 and an elastic expansion / contraction section 1.
4 and the entirety of the pressing portion 15 and the fixing portion 17 are integrally formed of a rubber-like elastic body such as natural rubber, synthetic rubber (NBR, FPM, IR, etc.), silicone rubber, and thermoplastic elastomer (EPDM, etc.). I have.

[0033] The valve body 13 connects the syringe to the connector tube 1.
In a state where the valve is not inserted into the connector tube 10, the valve is closed in close contact with the inner opening end portion 28 of the connector tube 10, as shown in FIG. Therefore, the inner opening end 28 of the connector tube 10 and the valve seat surface of the valve body 13 are smooth surfaces. The valve body 13 is elastically pressed against the inner opening end 28 of the connector tube 10 by the elastic expansion and contraction portion 14.

The elastic expansion and contraction portion 14 has one end connected to the valve body 13 and the other end connected to the fixing portion 17. The elastic expansion / contraction portion 14 has a communication opening that allows the connector tube 10 to communicate with the port 1 when the valve body 13 is opened. In the valve body 6 shown in the figure, elastic elastic portions 14 are connected to the four sides of the valve body 13, and a communication opening is formed between the elastic elastic portions 14. In the illustrated valve element 6, four rows of elastic expansion / contraction sections 14 are connected to the valve body 1.
3, the elastic expansion and contraction portions 14 may be arranged in two or three rows, or five or more rows. Further, the elastic expansion and contraction portion 14 may be formed in a cylindrical shape connected to the entire circumference of the valve body 13. The elastic expansion / contraction part 14 is provided with a through hole to form a communication opening.

As shown in FIG.
When the syringe is not inserted into the connector tube 10, the valve body 13 is elastically contracted and the valve body 13 is brought into close contact with the inner opening end 28 of the connector tube 10. In this state, the valve body 1
3 closes the inner open end 28 of the connector tube 10. As shown in FIG. 18, when the syringe 12 is inserted into the connector tube 10 and the valve main body 13 is pushed by the syringe 12, the elastic expansion and contraction portion 14 is extended. In this state, the valve body 13
Opens from the inner open end 28. At this time, the elastic expandable portion 14 is connected to the connector tube 10 via the communication opening.
To port 1.

The pressing portion 15 is provided inside the connector tube 10. The pressing portion 15 presses the valve body 13 without closing the tip of the syringe 12 inserted into the connector tube 10. The pressing portion 15 in the figure has a cross-shaped convex portion 30 at a portion that contacts the syringe 12, and a lower end of the cross-shaped convex portion 30 is connected to the valve body 13. The pressing portion 15 is pressed by the syringe 12 to open the valve body 13. The cross projection 30 is
When pressed by the tip of the syringe 12, the tip of the syringe 12 is not closed. The connector in which the pressing portion 15 and the valve body 13 are integrally formed of a rubber-like elastic body is a syringe 1
2 can be connected using a metal needle catheter. This is because the metal needle can be penetrated and connected to the pressing portion 15 of the valve body 6 and the valve body 13.

The fixing portion 17 has an outer surface connected to an inner surface of the port 1 by a fitting structure. The illustrated fixing portion 17 has a ring groove or a male screw structure on the outer circumference, and a ring ridge or a female screw structure connected to the ring groove or the male screw structure is provided on the inner surface of the port 1. The fixing portion 17 is connected to a fixed position of the port 1 in a state where a ring ridge or a female screw portion is fitted into a ring groove or a male screw portion. The fixing portion can be connected to the port by a structure in which a ridge or a groove provided partially and discontinuously is fitted. Further, the fixing portion can be connected to the inner surface of the port by an anchor structure. The connector shown is
Although the fixed portion is connected to the port, the fixed portion may be connected to the inner surface of the flange of the connector tube by a fitting structure. Furthermore, the fixing portion can be temporarily fixed to a mold for forming a flange or a port, and can be inserted and fixed.

As shown in FIG. 19, the above connector is also closed with a peel seal 20 that can peel off the outer opening end face 24 of the connector tube 10 until the syringe is connected. The peel seal 20 is hermetically adhered to the connector tube 10 by heat welding, or hermetically adhered through an adhesive. The connector for thermally welding the peel seal 20 is as follows.
The peel seal 20 is formed of a thermoplastic plastic film, and the connector tube 10 is formed of thermoplastic plastic. The peel seal 20 closing the opening of the connector tube 10 prevents the inside of the connector from being stained or contaminated with bacteria before the syringe 12 is connected. In this connector tube, instead of the peel seal, as shown in FIG. 16, a plug 21 for closing the outer opening end surface 24 is integrally formed, thereby preventing contamination by bacteria.

In the above connector, the connector cylinder is temporarily fixed to a mold for molding the valve body, and when the valve body is molded, the connector cylinder is inserted into the valve body and fixed at a fixed position. Can be. The valve element manufactured in this step can be manufactured by insert-molding a connector cylinder and fixing it at a fixed position. Conversely, when forming the connector tube, the valve body which has been formed in advance may be temporarily fixed to the connector tube forming mold to form the connector tube. The connector tube and the valve body that are connected by insertion can be connected to a fixed position by omitting the step of incorporating the connector tube into the valve body. However, the connector cylinder and the valve body may be separately formed and then connected. 8 to 10, FIGS. 13 to 15, FIGS. 17 and 18
The connector tube and the valve element shown in (1) can be inserted into a fixed position by insert molding. The connector cylinder and the valve element shown in FIGS. 5 to 7 are suitable for being separately molded and connected without being subjected to insert molding.

FIGS. 20 and 21 show the valve body 6 and the connector tube 10 for securely closing the inner open end 28 of the connector tube 10. FIG. Connector tube 1 shown in these figures
No. 0 has an undercut ridge 31 protruding inward at the lower edge. The valve body 6 is formed integrally with the entirety including the pressing portion 15 and the packing 23 with a rubber-like elastic body, and has a pressing ridge 32 projecting outward at a lower end portion of the pressing portion 15. Undercut ridge 31 and pressing ridge 32
In the valve closed state, as shown in FIG. 20, the pressing ridge 32 is configured to elastically press the undercut ridge 31. When the pressing portion 15 is pressed by the syringe, the undercut ridge 31 is pushed downward beyond the pressing ridge 32 to open the valve. In this state, the communication opening 16 provided between the elastic expansion and contraction portions 14 connects the connector tube 10 to the port 1. When the syringe (not shown) is pulled out, FIG.
As shown in the figure, the elastic expansion and contraction portion contracts, and the pressing ridge 32 elastically presses the inner opening end portion 28 (the same location as the undercut ridge 31 in this figure) of the connector tube 10. Close the valve.

FIGS. 22 and 23 further show a locking recess 33 provided on the outer periphery at the lower end of the connector tube 10, and a locking projection 34 guided by the locking recess 33 is provided on the valve body 13. . At this time, the valve body 13 takes a shape that extends around the lower end of the connector tube 10. The valve body is provided with a locking projection 34.
The entirety including the valve body 13 having the above is integrally formed of a rubber-like elastic body. In the initial valve closed state, the locking concave portion 33 and the locking convex portion 34 are formed in a shape in which the locking convex portion 34 projects into the locking concave portion, as shown in FIG. Pressing part 1
When the syringe 5 is pushed by the syringe, the engaging projection 34 is engaged with the engaging pusher 3.
It is pushed downward beyond 3 and opens. In this state,
A connection opening provided between the elastic contraction portions 14 connects the connector tube 10 to the port 1. When the syringe (not shown) is pulled out, as shown in FIG. 23, the elastically expanding and contracting portion contracts, and the locking convex portion 34 closes the valve in a form in which the connector tube inner opening end portion 28 is elastically pressed. The valve body shown in these figures, like the structure shown in FIGS. 20 and 21, has an initial sealing property at the time of closing the valve and after the co-injection operation (after pressing the valve with the syringe to open the valve, and then removing the syringe) ) There is a feature that the sealing property can be improved.

Connector tube 1 shown in FIGS.
0 indicates that the inner surface is an uneven surface 35 so that the liquid can pass smoothly in the valve-open state. FIG. 24 is a cross-sectional view of the valve closed state,
FIG. 25 is a sectional view of the valve open state, FIG. 26 is a plan view, and FIG. 27 is a bottom view. The connector tube 10 shown in these figures is
Grooves or ridges are provided on the inner surface to extend in the axial direction, and uneven surfaces 3
5 is assumed. The connector tube 10 can prevent the pressing portion 15 from being in close contact with the inner surface and preventing the liquid from passing therethrough. Therefore, the connector tube 10 having this structure has a feature that the gap between the pressing portion 15 and the inner surface of the connector tube 10 is narrowed to allow the liquid to pass through reliably. Furthermore, in the elastic expansion / contraction part 14,
A slit-shaped communication opening 16 is provided in parallel with the lower end surface of the connector tube 10. This communication opening 16 is as shown in FIG.
As shown in FIG. 7, when the elastic expansion / contraction part 14 is extended, it opens greatly to allow the liquid to pass.

The connector tube 10 shown in FIG.
As shown in the front view of FIG. 8, a lock ridge 36 for luer lock is provided at the distal end. The locking ridge 36 is guided by a concave portion (not shown) at the tip of the syringe inserted into the connector tube 10 to luer-lock the syringe to the connector tube 10. The lock ridge 36 is inclined so that the syringe inserted into the connector tube 10 can be rotated and lure locked. The inclination direction of the lock ridge 36 is shown in FIG.
In, since the syringe is inserted from above to below, it is inclined in the direction of descending in the rotational direction.

[0044]

According to the connector of the present invention, the valve does not open even when pressure is applied. This is because the valve body is elastically pressed against the inner opening end of the connector tube by the elastic expansion and contraction portion, and the valve is closed. When the internal pressure of the container or the like connecting the ports is increased, the valve body is pressed against the inner opening end of the connector cylinder by the internal pressure, so that the connector closed in this state is more reliably closed.

Further, the connector of the present invention has a feature that it can be mass-produced simply, easily, and inexpensively. This is because the connector of the present invention can reliably close the inner open end of the connector tube connecting the syringe with a valve body having a simple structure.

Further, the connector tube of the present invention has a feature that syringes having various structures can be reliably connected. This is because the connector of the present invention opens the valve by pressing the elastic expansion and contraction portion of the valve body with a syringe. Further, the connector of the present invention has a feature that the valve body and the pressing portion can be formed of a rubber-like elastic body, and this type of connector has a feature that a syringe as a metal needle can also be connected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a conventional needleless connector.

FIG. 2 is a sectional view of another conventional needleless connector.

FIG. 3 is a cross-sectional view of another conventional needleless connector.

FIG. 4 is a schematic view showing a use state of the needleless connector according to the embodiment of the present invention.

FIG. 5 is a sectional view showing a closed state of the needleless connector according to the embodiment of the present invention.

FIG. 6 is a sectional view showing a state where a syringe is connected to the connector shown in FIG. 5 and a valve is opened;

7 is a plan view, a cross-sectional view, and a bottom view of a connector tube, a valve body, and packing of the connector shown in FIG. 5;

FIG. 8 is a sectional view showing a closed state of a needleless connector according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view showing a state where a syringe is connected to the connector shown in FIG. 8 and the valve is opened;

10 is a plan view, a sectional view, and a bottom view of a connector tube and a valve body of the connector shown in FIG. 8;

FIG. 11 is a front view showing a state where the connector according to the embodiment of the present invention is connected to an infusion container.

FIG. 12 is an enlarged perspective view of a valve body of the connector shown in FIG. 10;

FIG. 13 is a sectional view showing a closed state of a needleless connector according to another embodiment of the present invention.

14 is a sectional view showing a state where a syringe is connected to the connector shown in FIG. 13 and a valve is opened.

15 is a plan view, a cross-sectional view, and a bottom view of a connector tube and a valve body of the connector shown in FIG.

FIG. 16 is a plan view, a cross-sectional view, and a bottom view showing a connector tube in which a plug is integrally formed.

FIG. 17 is a sectional view showing a valve-closed state of a needleless connector according to another embodiment of the present invention.

18 is a sectional view showing a state where a syringe is connected to the connector shown in FIG. 17 and a valve is opened.

FIG. 19 is a front view of the connector shown in FIG. 17;

FIG. 20 is a sectional view showing a closed state of a connector tube, a valve body, and packing according to another embodiment of the present invention.

FIG. 21 is a sectional view showing a closed state of the connector cylinder, the valve body, and the packing shown in FIG. 20;

FIG. 22 is a sectional view showing a closed state of a connector tube, a valve body, and a packing according to another embodiment of the present invention.

FIG. 23 is a sectional view showing the closed state of the connector cylinder, the valve body, and the packing shown in FIG. 22;

FIG. 24 is a cross-sectional view showing a closed state of a connector tube, a valve body, and packing according to another embodiment of the present invention.

25 is a sectional view showing a closed state of the connector cylinder, the valve body, and the packing shown in FIG. 24;

FIG. 26 is a plan view of the connector cylinder, the valve body, and the packing shown in FIG. 24;

FIG. 27 is a bottom view of the connector cylinder, the valve body, and the packing shown in FIG. 24;

FIG. 28 is a front view of the connector tube shown in FIG. 24;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Port 2 ... Rubber stopper 3 ... Through hole 4 ... Bellows 5 ... Needle 6 ... Valve body 7 ... Flange 8 ... Elastic leg 9 ... Valve seat 10 ... Connector cylinder 11 ... Flange 12 ... Syringe 13 ... Valve body 14 ... Elasticity Telescopic part 15 ... Pressing part 15A ... Valve plate 16 ... Communication opening part 17 ... Fixing part 18 ... Connection groove 19 ... Fit groove 20 ... Peel seal 21 ... Plug body 22 ... Infusion container 23 ... Packing 24 ... Outside opening end face 25 ... Outer ring 26 ... Ring part 27 ... Inner ring 28 ... Inner opening end part 29 ... Branch tool 30 ... Cross convex part 31 ... Undercut convex part 32 ... Pressing convex part 33 ... Locking concave part 34 ... Locking convex part 35 ... Concavity and convexity Surface 36: Lock ridge 37: Adapter

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C066 AA07 BB02 CC01 DD01 EE02 EE14 GG05 JJ05 JJ07 LL06 LL08

Claims (10)

[Claims] 1. A flange for hermetically closing an opening of a port (1).
A connector tube (10) having (11) and a valve body (6) for closing the connector tube (10) inside, and when the syringe (12) is inserted into the connector tube (10) and connected, A needleless connector, wherein the valve element (6) is configured to be opened, and the valve element (6) has all of the following configurations. (A) The valve body (6) is the inner open end of the connector tube (10)
(28) to close the connector tube (10)
3), an elastic expansion / contraction part (14) for elastically pressing the valve body (13) against the inner opening end (28) of the cylindrical body, and the valve body (13) being pressed by the syringe (12) to the inside. A pressing portion (15) for opening the valve away from the opening end (28). (B) The pressing portion (15) is formed into a shape that does not close the tip of the syringe (12) while being pressed by the syringe (12). (C) The elastic expansion and contraction portion (14) has a communication opening (16) for connecting the connector tube (10) to the port (1) when the valve body (13) is opened, and the valve body ( When the syringe (12) is not pressed by the syringe (12), it contracts elastically and presses the valve body (13) against the inner open end (28) of the connector tube (10) to open the inner open end of the connector tube (10). Section (28) is closed and the valve body (1
When the valve (3) is pushed by the syringe (12) and separated from the inner opening end (28) to open the valve, the connector tube (10) is connected to the port (1) through the communication opening (16). It is composed. 2. The valve body (6) is integrally formed with a packing (23) with a rubber-like elastic body, and the packing (23) connects the flange (11) of the connector tube (10) to the port (1). The needleless connector according to claim 1, wherein the connector is airtightly connected. 3. A valve body (6) connects one end of an elastic expansion / contraction part (14) to a fixed part (17), and the connector tube (10) is connected to the fixed part (1).
7) has a connecting groove (18) on the lower surface of the flange (11) for fitting and connecting, and the fixing portion (17) is fitted on the connecting groove (18) to form the elastically stretchable portion (1).
The needleless connector according to claim 1, wherein one end of (4) is connected to the connector tube (10). 4. A fitting groove in which the valve element (6) connects one end of the elastic expansion / contraction part (14) to the fixing part (17), and the port (1) fits and connects the fixing part (17). The needleless connector according to claim 1, comprising (19). 5. A connector tube (10) having an undercut ridge (31) projecting inward at a lower edge thereof, a valve body (6) being formed of a rubber-like elastic body, and a pressing portion (15). ) Has a pressing ridge (32) protruding outward at the lower end of the pressing ridge (3).
The needleless connector according to claim 1, wherein 2) is closed by contacting the undercut ridge (31). 6. The connector tube (10) has a locking recess (33) on the outer periphery.
A locking projection (34) guided by the locking recess (33) is provided on the elastic elastic portion (14) of the rubber-like elastic body, and the locking projection (34) is The needleless connector according to claim 1, wherein the part (32) is guided and closed. 7. The needleless connector according to claim 1, wherein the inner surface of the connector tube (10) is an uneven surface (35). 8. The needleless connector according to claim 1, wherein the outer open end face (24) of the connector tube (10) is closed with a peelable peel seal (20). 9. The connector tube (10) has an outer opening end surface (24).
The needleless connector according to claim 1, wherein the plug (21) for closing the connector is integrally formed so as to be separable. The pressing portion (15) of the valve element (6) is provided with a syringe (1).
2. A cross-shaped projection (30) is provided at a portion contacting with (2).
Needleless connector as described in.