JP2002355318A - Connector with valve body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector which prevents the leakage of a fluid from a valve body when the connector is connected to other connector to inject or suck, which has excellent prevention of a pressurized fluid from the leakage when the connector is not connected to the other connector and which has the valve body capable of being used safely. SOLUTION: The connector 1 comprises a cylindrical body 5 having a distal end 2 and a proximal end 3, a connecting port 12 provided at the end 2, a tube 11 fixed to the end 2 and extended to the distal end side, an elastic element 10 for engaging to cover the tube 11, and the valve body 7 having a slit 9 provided at a distal end of the element 10 to be normally closed in such a manner that the body 7 is moved to the proximal end side to open the slit 9 by a contact with the tube 11. A cross section of the body 7 has a non-circular shape in which a diameter in a direction perpendicular to a direction of the slit 9 becomes longest. When the body 7 is disposed in the port 12, an outer wall of the body 7 in the direction perpendicular to the direction of the slit of the body 1 is pressed by an inner wall of the port 12 to prevent the leakage of a liquid from the slit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection / suction device used to administer a drug or the like or to suck blood or the like.

[0002]

2. Description of the Related Art A connector provided with a slit that penetrates a valve element is disclosed in Japanese Patent Application Laid-Open No. 5-245221. In this method, the flow path is opened at the time of connection by opening and closing a slit provided on the valve body, and is cut off at the time of non-connection. However, the connector disclosed herein uses an elastic material for the valve body,
Since the valve is opened and closed only by the resilience of the elastic material, when pressure is injected from the downstream of the connector by an infusion pump or the like, the fluid may flow out of the slit, When an infusion pump or the like is used as described above, it has been difficult to prevent liquid leakage from a slit provided in a valve body.

[0003]

SUMMARY OF THE INVENTION The present invention prevents leakage of a fluid such as a drug solution from a valve body when an injection or suction operation of a drug solution or the like is performed by connecting to another connector. Is not connected,
An object of the present invention is to provide a connector provided with a valve element which is excellent in preventing leakage of a fluid pressurized by an infusion pump or the like and can be used safely.

[0004]

According to the present invention, the following objects can be attained.

(1) A tubular main body having a distal end and a proximal end, a connection port provided at the distal end, and a tubular body fixed to the proximal end and extending toward the distal end; An elastic body for fitting the tubular body, and a valve body provided with a normally closed slit provided at the distal end of the elastic body, wherein the valve body moves to the base end side and A connector in which the slit is opened by contact with a body, wherein a cross section of the valve body has a non-circular shape having a longest diameter in a direction perpendicular to the direction of the slit, and the valve body is provided in the connection port. When located, an outer wall of the valve body in a direction perpendicular to the direction of the slit is pressed against an inner wall of the connection port to prevent leakage of liquid from the slit.

(2) The connector with a valve element according to (1), wherein the cross section of the valve element is elliptical.

(3) The connector with a valve element according to (1) or (2), wherein the valve element has a projection in a direction perpendicular to the direction of the slit.

(4) The connector with a valve element according to any one of (1) to (3), wherein the distal end of the valve element has a circular shape.

(5) The connector with a valve body according to (1) to (4), wherein the connection port has a Luer taper.

(6) The connector with a valve body according to (1) to (5), wherein a male connector is provided at a base end of the main body.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The connector of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view of the connector of the present invention. FIG. 2 is a perspective view of a valve body used in the connector of the present invention as viewed from the tip. FIG. 3 is a sectional view of the valve body taken along line AA ′ in FIG. FIG. 4 is a sectional view showing a case where a male connector is connected to the connector of the present invention.

The connector 1 of the present invention has a cylindrical main body 5 having a distal end 2 and a proximal end 3, and a connection port 12 which can be fitted to a male connector at the distal end 2. FIG.
In the embodiment, the male connector 4 is provided at the base end portion 3, but a medical tube, a Y site, a three-way cock, or the like may be provided instead of the male connector 4 (not shown). A tube 11 is fixed to the base end 3 inside the main body 5. The tube 11 is located near the center of the main body 5 and extends toward the distal end. The inside of the tube 11 is a fluid passage 20.

An elastic body 10 for fitting the tubular body 11 is provided inside the main body 5, and this elastic body 10 has a substantially cylindrical shape having a slit 9 which is normally closed at the end. It has a valve element 7. The valve element 7 can freely move within the main body 5 between a sealing position on the distal end side and an open position of the slit 9 on the proximal end side. The fluid passage is opened when 11 is brought into contact and inserted (see FIG. 4).

As shown in FIGS. 2 and 3, a part of the valve element 7 has a non-circular cross section in which the diameter in the direction perpendicular to the direction of the slit 9 is the longest. When the valve element 7 is located in the connection port 12, the cross section of the valve element 7 is non-circular, and the outer wall of the portion having the longest diameter is pressed against the inner wall of the connection port 12. Has become. In order to make the valve body 7 compressed as described above, the longest non-circular diameter of the valve body 7 may be set to be longer than the inner diameter of the connection port 12.

The shape of the tip (top surface 15) of the valve body 7 is shown in FIG.
Preferably, the diameter of the top surface 15 is substantially equal to the inner diameter of the distal end of the connection port 12 as shown in FIG. By doing this,
The insertion of the valve body 7 into the connection port 12 can be facilitated.

The non-circular shape of the cross section of the valve body 7 is preferably such that the diameter in the direction perpendicular to the direction of the slit 9 is the longest. For example, an elliptical shape, a polygonal shape, etc. are particularly preferable. When the valve 7 is located in the connection port 12 as described above, the portion having such a shape
If the outer wall of the portion having the longest non-circular cross-sectional shape is configured to be pressed against the inner wall of the connection port 12, the valve body 7
Can be provided at any part. Further, the portion of the non-circular cross-sectional shape provided in a part of the valve body 7 may be one or two or more.

Further, when the valve element 7 is located in the connection port 12, a projection may be provided on the outer wall in a direction perpendicular to the direction of the slit 9 of the valve element 7 so as to be pressed against the inner wall of the connection port 12. Good. Two or more projections may be provided as long as they are located on the outer wall of the valve element 7 in a direction perpendicular to the direction of the slit 9.

As shown in FIG. 4, the distal end portion 2 of the main body 5 is provided.
May be the connection port 12 that can be fitted with the male connector 21. At this time, it is preferable that the inner wall of the connection port 12 is a female luer taper having a tapered shape that gradually decreases from the distal end toward the proximal end because the fitting force is improved.

When the connection port 12 has a luer taper,
It is preferable that the length L1 at which the diameter of the non-circular cross-sectional shape provided on the valve element 7 is the longest is equal to or slightly shorter than the outer diameter L2 of the top surface 15 located at the tip of the valve element 7. Although the details will be described later, this does not substantially affect the movement of the valve element 7 in the connection port 12.

The slit 9 is normally closed as shown in FIGS. 1, 2 and 3, but when the male connector 21 is connected to the connection port 12 as shown in FIG. The elastic body 10 is pressed and contracted via the valve body 7 located at the distal end of the valve 10, and the valve body 7 moves to the base end side. At this time, the pipe 11 pushes the slit 9 of the valve 7 open and is inserted, and the pipe 11 further penetrates the slit 9. Then, the pipe 11 penetrating the slit 9 is inserted into the lumen of the male connector 21, and the flow path 20 of the pipe 11 is opened to the flow path with the lumen of the male connector 21.

When the male connector 21 is pulled away from the connection port 12, the valve body 7 is pushed back to the original position (sealing position) in the connection port 12 by the restoring force of the elastic body 10 (see FIG. 1). At this time, the slit 9 opened by the penetrating tube 11 returns to the closed state when the tube 11 comes off.

Here, the longest length L1 of the portion where the cross section of the valve element 7 has a non-circular shape is substantially the same as the inner diameter of the distal end of the connection port 12. Has a Luer taper that gradually decreases to the base end side,
It is set longer than the inner diameter of the connection port 12 on the base end side. For this reason, when the slit 9 returns to the sealing position as described above, the inner wall of the connection port 12 is pressed. Then, only the direction perpendicular to the direction of the slit 9 is pressed so that the slit 9 is closed more tightly. As a result, outflow and backflow of the chemical solution or the like from the connection portion can be prevented. That is, the closed state of the slit 9 can be firmly maintained against the pressure generated by the flow of the fluid.

As described above, the length L1 at which the diameter of the non-circular cross-sectional shape provided on the valve body 7 is the longest is determined by the valve body 7
It is preferable that it is equal to or slightly shorter than the outer diameter L2 of the top surface 15 located at the front end of the head. By doing so, the valve element 7 pushed into the main body 5 by the male connector 21
However, the elastic member 10 can return to the sealing position in the connection port 12 without any problem due to the restoring force.

The material of the valve body 7 is preferably an elastically deformable material such as rubber or thermoplastic elastomer. Furthermore, there is chemical resistance like silicone rubber,
It is particularly preferable that the components do not elute and do not absorb the chemicals and swell. The elastic body 10 preferably has a bellows-like configuration so as to be able to expand and contract along the tubular body 11.

As a material of the main body 5, for example, a synthetic resin such as polypropylene or polyethylene, a metal or the like can be used.

As described above, the connector 1 of the present invention can prevent the outflow and backflow of the chemical solution from the slit 9 provided in the valve body 7 by adopting such a configuration.

(First Embodiment) Next, a first embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a sectional view showing an embodiment of the present invention. As shown in the figure, the connector 31 of the present invention is provided with a main body 35 having a connection port 312 at a distal end portion 32, and a tube 311 fixed to a base end portion 33 inside the main body 35. Further, the tube 311 extends toward the distal end, and an elastic body 310 that covers the tube 311 is provided.

The elastic body 310 has a valve body 37 for sealing the tube, and the valve body 37 is provided with a slit 39.

The diameter and inner wall of the connection port 312 are set to ISO No. 5
It is manufactured according to 94-2 and has a female luer taper.

The main body 35 is provided with the first body 35 so as to be easily assembled.
And a second main body 352,
A lock-type male connector 34 is provided at the base end 33 of the main body 352. The second main body 352 is also provided with a tube 311 and is manufactured by integrally molding with polypropylene. The first body 351 was also made of polypropylene. The outer diameter of the tube 311 was 1.2 mm.

The valve 310 was made of silicone rubber, and a portion along the axis was formed in a bellows shape on the tube 311.
The valve body 37 has a tip with a diameter of 4.24 mm and a slit 3
9 was provided with a width of 2.0 mm, and the length of the valve body was set to 5 mm.

The elastic body 310 is fitted on a tube 311 fixed to the proximal end 33 of the lumen of the second main body 352,
Next, the first main body 351 was bonded and fixed.

FIG. 6 shows the valve element 37 taken along the line BB 'in FIG.
FIG. The valve body 37 is formed in a substantially cylindrical shape as shown in FIGS. 5 and 6, has a reduced diameter portion having a shape gradually decreasing from the distal end side to the proximal end side, and an ellipse whose major axis is perpendicular to the direction of the slit. And the top surface was circular. The major axis of this ellipse was set to 4.24 mm, and the minor axis was set to 3.8 mm.

The physiological saline pressurized was sent from the male connector 34 side of the connector 31 thus produced.

As a result, there was no leakage from the slit 39 even when the physiological saline was injected at a pressure of ² kgf / cm ² . For this reason, leakage of a drug solution or the like is eliminated even when used in a clinical setting using an infusion pump or the like.

(Second Embodiment) In the second embodiment, only the parts different from the first embodiment will be described. FIG.
It is sectional drawing of the valve element 47 of embodiment, and is cut | disconnected in the same position as 1st Embodiment. As shown in FIG. 7, in the second embodiment, the valve body 47 has a length of 5 mm and has a circular shape whose diameter gradually decreases from the distal end to the proximal end. The distal end of the valve element 47 has a circular shape with a diameter of 4.24 mm, and the proximal end of the valve element 47 has a circular shape with a diameter of 3.8 mm.
The projections 4 are respectively provided at positions opposed to each other in a direction perpendicular to the direction of FIG.
8 is provided. A connector similar to that of the first embodiment was manufactured except that the length in the direction perpendicular to the direction of the slit 49 including the protrusion 48 provided on the valve body 47 was set to 4.24 mm, and the same as in Example 1 A physiological saline solution was injected from the male connector side at a pressure of ² kgf / cm ² , but there was no leakage from the slit 49.

(Comparative Example) FIG. 8 is a cross-sectional view of a valve body 57 used in a comparative example when cut at the same position as the valve bodies of the first and second embodiments. As shown in FIG. 8, the valve body 57 has a cylindrical shape with a circular cross section, the length of the valve body 57 is 5 mm, the diameter of the distal end (top surface 515) is 4.24 mm, and the shape of the base end is The diameter was 3.94 mm, and it was manufactured so as to fit the taper of the connection port. Except for this, it was manufactured in the same manner as the example of the present invention. Physiological saline was injected into this connector at a pressure of ² kgf / cm ² ,
Liquid leakage from the slit 59 was confirmed.

As described above, the connector of the present invention
Even if the fluid pressurized by an infusion pump is sent, the fluid does not leak out and can be used safely. Further, regardless of the embodiment of the present invention, any shape may be used as long as a part of the elastic body is a non-circular shape having the longest diameter in a direction perpendicular to the direction of the slit.

[0040]

By using the non-circular valve element of the present invention at the connection portion of the connector with the automatic opening and closing valve element having the slit, it is possible to prevent the outflow and backflow of the chemical solution from the slit, and to inject the liquid with confidence. A pump or the like can be used.

[Brief description of the drawings]

FIG. 1 is a sectional view of a connector of the present invention.

FIG. 2 is a perspective view of a valve element used in the connector of the present invention, as viewed from the tip.

FIG. 3 is a sectional view of the valve body taken along line AA ′ of FIG. 1;

FIG. 4 is a sectional view showing a case where a male connector is connected to the connector of the present invention.

FIG. 5 is a cross-sectional view according to the first embodiment.

FIG. 6 is a sectional view of the valve body taken along line BB ′ of FIG. 5;

FIG. 7 is a sectional view of a valve body according to a second embodiment.

FIG. 8 is a sectional view of a valve body of a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector 2 Tip part 3 Base part 4 Male connector 5 Main body 6 Fixed part 7 Valve body 9 Slit 10 Elastic body 11 Tubular body 12 Connection port 15 Top surface 20 Flow path 21 Male connector 31 Connector 32 Tip part 33 Base part 34 Male connector 35 Main body 37 Valve body 39 Slit 310 Elastic body 311 Tube 312 Connection port 351 First main body 352 Second main body 321 Male connector 47 Valve body 48 Projection 49 Slit 515 Top surface 57 Valve body 59 Slit

Claims (6)

[Claims] A tubular body having a distal end portion and a proximal end portion, a connection port provided at the distal end portion, a tube fixed to the proximal end portion and extending toward the distal end portion, An elastic body for fitting the tubular body, and a valve body provided with a normally closed slit provided at the distal end of the elastic body, wherein the valve body moves to the base end side and A connector in which the slit is opened by contact with a body, wherein a cross section of the valve body has a non-circular shape having a longest diameter in a direction perpendicular to the direction of the slit, and the valve body is provided in the connection port. When located, an outer wall of the valve body in a direction perpendicular to the direction of the slit is pressed against an inner wall of the connection port to prevent leakage of liquid from the slit. 2. The connector with a valve element according to claim 1, wherein the cross section of the valve element is elliptical. 3. The connector with a valve element according to claim 1, wherein the valve element has a protrusion in a direction perpendicular to the direction of the slit. 4. The connector with a valve element according to claim 1, wherein the tip of the valve element has a circular shape. 5. The connector with a valve body according to claim 1, wherein the connection port has a Luer taper. 6. The connector with a valve body according to claim 1, wherein a male connector is provided at a base end of the main body.