JPH11299904A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily prevent the leakage of a chemical from a needle even during accidental disconnection. SOLUTION: A connector having a needle 6 in a lumen is connected in a demountable and slidable and rotationally movable manner to the base end of a mixture and filling portion 51 provided with a chemical inflow port 52 mounted at its base end with a rubber elastic body 56 shut off the outside to stab the needle 6 therein. When the connector 1 is mounted on the mixture and filling portion 51, the needle 6 is moved back to open a passage for a chemical and, when the connector 1 is moved apart from the mixture and filling portion 51, the needle 6 is moved forward to shut out the passage for the chemical.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion device such as a liquid co-infusion device and a catheter used for temporarily or long-term infusion of a drug solution into an infusion line or for collecting blood from an arterial / venous line. The connector relates to a connector which is connected to a co-injection portion and which allows a drug solution or the like to flow into the co-injection portion by a needle portion provided in the lumen.

[0002]

2. Description of the Related Art In the case of injecting another drug solution or the like during various nutritional administrations such as central venous nutrition therapy, a co-infusion unit to which an infusion line of another route prepared in advance in the infusion route is connected. Is generally used. As a means used in the co-injection section, a septum that blocks bacteria from entering the infusion line and reduces the chance of infection, that is, a co-injection section having a rubber-like elastic body, such as a Y-type injection section, Liquid co-infusion device and a connector connected to it.

FIG. 8 is an external view showing a cross section of a part of a conventional typical Y-type liquid co-injection device and a connector used for connection thereto, and an operation explanatory diagram thereof. In the figure, reference numeral 51 denotes a housing constituting a main body of a Y-type liquid co-infusion device, which is a tubular body having a co-infusion port 52 and an outflow port 53 at both ends, and a branch pipe 54 generally formed at an intermediate portion. It has an inlet 55 at the end. Reference numeral 56 denotes a rubber-like elastic body which seals the co-injection port 52, and is held in the co-injection port 52 by a cap 57 fitted in the co-injection port 52. 58 is a double external screw provided on the outer wall of the housing 51;
Is a step portion provided on the branch pipe 54 side with respect to the external thread 58 of the outer wall of the housing 51 to close a tip portion of a hood portion of a connector described later.

[0006] A connector 60 is connected to the co-injection port 52 side, which is the base end of the housing 51.
7 is formed into a closed cylindrical shape substantially equal to the outer diameter of the housing 7, and the co-injection port 52 side of the housing 51 is slidably and rotatably fitted into the cylindrical body portion, and is screwed into an outer screw 58 of the housing 51. Hood portion 6 having inner screw 62 provided on the inner wall
1, a substantially cylindrical connecting portion 63 provided substantially at the center outside the lid of the hood portion 61, and a lumen 64a substantially at the center.
A needle portion 65 whose one base portion is inserted into the lumen 64a at one end and is punctured by the rubber-like elastic body 56, and an extension tube 66 used at the time of co-injection or the like is provided at the other end. And a connecting portion 64 connected to the connecting portion 63 such that the needle portion 65 is located inside the hood portion 61.

[0005] A branch pipe 54 having an extension tube 67 connected to an inlet 55 is used as a main route, and the main chemical solution flows through the main route through an outlet 53 of the housing 51.
From the extension tube 68 connected to the patient side (such as a blood vessel)
Administered to As shown in FIG. 8B, the hood 6 of the connector 60 is provided on the co-injection port 52 side of the housing 51.
1, the connector 60 is connected to the housing 51 by the external screw 58 and the internal screw 62, and the needle 52 is pierced into the rubber-like elastic body 56 at the co-injection port 52 side as a co-injection route, and other chemicals are extended. Through the co-infusion route from the tube 66, the mixture is continuously administered to the patient side (such as a blood vessel) from the extension tube 68 connected to the outlet 53 while mixing with the main drug solution in the housing 51.

When the administration of the other drug solution is terminated, the screw between the outer screw 58 provided on the housing 51 and the inner screw 62 of the connector 60 is loosened, and the needle 65 is brought into contact with the rubber-like elastic body 5.
The connector 60 is pulled in a direction to come out of the connector 6 and detached.

[0007]

When the conventional connector 60 as described above is detached from the Y-type liquid co-infusion device to terminate the administration of another chemical solution, the chemical solution from the extension tube 66 of the connector 60 is removed. Before extension, the extension tube 66 was clamped to prevent the liquid from leaking out so as not to spill out to the outside of the connector 60 through the needle portion 65 or to drop on the floor or the like. However, this operation is troublesome. Was something. Some connectors are provided with an ON / OFF switch for starting or stopping the administration of the medicinal solution from the extension tube 66 in the connector 60 to simplify the closing operation. For example, when an accident such as the connection of the connector 60 is loosened during the transfusion and the connector 60 comes off the housing 51, an operation such as clamping and closing the extension tube 66 cannot be performed. For,
There was a problem that the infusion from the needle portion 65 leaked to a bed or a floor and was immersed in water.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is easy to easily disconnect the needle from the needle even if the connection is accidentally disconnected as well as when the connection is intentionally released. It is an object of the present invention to provide a connector capable of preventing leakage of a chemical solution.

[0009]

SUMMARY OF THE INVENTION A connector according to the present invention has a needle portion in a lumen, and a chemical solution having a rubber-like elastic body attached to a base end portion, which is cut off from the outside and pierces the needle portion, is attached. In the connector detachably and slidably and rotatably connected to the base end of the co-injection unit having the inlet, the needle retracts when the connector is attached to the co-infusion unit to open the flow path of the drug solution, When the connector is detached from the co-injection section, the needle section advances to cut off the channel of the chemical solution.

[0010] A connector according to the present invention is a co-injection section having a needle portion in a lumen, and a chemical liquid inlet provided at a base end thereof with a rubber-like elastic body which is cut off from the outside and the needle portion is punctured. A detachable, slidable and rotatable connector connected to the base end of the needle, wherein the needle is provided at the distal end, and the needle is inserted into the base by resistance generated when the needle is punctured into the rubber-like elastic body. Side to open the flow path of the drug solution from the extension tube connected to the base side to the co-injection part, and the needle part is moved to the tip side by the resistance generated when the needle part is removed from the rubber-like elastic body. A sliding means is provided on the base side for blocking the flow path of the chemical solution from the extension tube to the co-injection section by sliding the base section.

[0011] A connector according to the present invention comprises a cylindrical hood portion detachably and slidably and rotatably fitted to the outside of the base end portion of the co-injection portion, and a substantially central portion outside the lid portion of the hood portion. And a substantially cylindrical connecting portion to which the extension tube is connected, and sliding means slidably fitted in the lumen of the connecting portion.

In the connector according to the present invention, the sliding means comprises:
A needle body having a through hole near the base side and having a through hole orthogonal to the axial direction, and having a lumen in which the base side of the needle part is inserted into the through hole at substantially the center of the tip part side, The slide body is slid toward the base side by the resistance generated when the rubber-like elastic body is punctured to communicate the through-hole with the extension tube. While opening through the lumen of, the slide body is slid toward the distal end side by the resistance generated when the needle part is removed from the rubber-like elastic body, and the through hole is closed by the lumen wall of the connecting part, The flow path of the chemical solution from the extension tube to the co-injection section is shut off.

Further, in the connector according to the present invention, the sliding means is constituted by a blunt needle portion having a cylindrical shape with a cover and a tip portion formed in a needle shape, and having a plurality of side holes in a side wall near the base portion.
The blunt needle is slid toward the base side by the resistance generated when the needle-like tip is punctured into the rubber-like elastic body, the side hole communicates with the extension tube, and the flow path of the drug solution from the extension tube to the co-injection section Through the side hole and the lumen of the blunt needle,
The blunt needle is slid toward the distal end by the resistance generated when the needle-like distal end is removed from the rubber-like elastic body, the side hole is closed by the lumen wall of the connecting part, and from the extension tube to the co-injection part The flow path of the chemical solution is cut off.

Further, the connector according to the present invention is provided with a holding means for holding a position slid toward the base side and the tip side of the blunt needle at the base end of the hood and the co-injection part. .

A connector according to the present invention comprises a cylindrical hood portion detachably and slidably and rotatably fitted to the outside of the base end portion of the co-injection portion, and a substantially central portion outside the lid portion of the hood portion. And a distal end portion is fitted into the lumen of the coupling portion, an extension tube is connected to the proximal end portion, and a sliding means is slidably fitted in the lumen. And a connection portion.

In the connector according to the present invention, the connecting portion is formed into a bottomed cylindrical shape having an insertion hole through which the needle portion is inserted substantially at the center of the bottom portion, and the needle portion slides in the axial direction inside the bottom portion. While providing a seal valve body that is rotatably inserted and that prevents the chemical solution from the extension tube from flowing out to the insertion hole side,
The base of the needle portion is fitted into the sliding means at a substantially central portion on the distal end side, and one of the opposed outer surfaces has an arc shape in contact with the inner wall of the connecting portion, and the other opposed outer surface has the connecting portion. A holding member formed in a substantially flat shape having a gap between the inner wall of the needle and a plurality of side holes provided in a side wall of the needle portion near the holding member, and the needle portion is formed into a rubber-like elastic body. The holding member is slid to the base side by the resistance force generated when puncturing, the side hole is positioned closer to the base side than the seal valve body, communicates with the extension tube via the gap, and the flow of the drug solution from the extension tube to the co-injection portion. The passage is opened through the side hole and the lumen of the needle portion, and the holding member is slid toward the distal end portion by the resistance generated when the needle portion is removed from the rubber-like elastic body, so that the side hole is sealed in the seal valve body. Or, it is located on the tip side to prevent communication with the extension tube, It is obtained so as to block the flow path of the liquid medicine to Luo mixed injection unit.

In the connector according to the present invention, the connecting portion is formed in a substantially cylindrical shape, and the sliding means has a through hole near the base side in a direction perpendicular to the axial direction. A substantially T-shaped cross-section is provided with a lumen that communicates with the through hole and has a base portion of the needle portion fitted therein, and a seal member that prevents inflow of the drug solution from the extension tube into the through hole is provided inside the through hole. A slide member, a spring holding member having a substantially convex cross section provided with a plurality of passage holes through which a chemical solution from the extension tube passes in the collar portion, and a slide member interposed between the slide member and the spring holding member. And a spring member that urges the needle portion toward the distal end side, and slides the slide member toward the base side while compressing the spring member by a resistance force generated when the needle portion is pierced into the rubber-like elastic body to form the through hole. Extends through the through hole of the spring holding member And the flow path of the drug solution from the extension tube to the co-injection section is opened through the through-hole and the lumen of the needle section, and a resistance force and a spring member generated when the needle section is removed from the rubber-like elastic body. The slide member is slid toward the distal end by the urging force of the above, the through-hole is closed by the seal member and the lumen wall of the connection portion, and the flow path of the drug solution from the extension tube to the co-infusion portion is shut off. is there.

Further, in the connector according to the present invention, the connecting portion is formed in a substantially cylindrical shape, the sliding means has a sharp projection at the base end, and the base of the needle is fitted into the center at the substantially center. A slide member having a substantially cross-shaped cross section having a bore formed therein, and comprising an elastic body for preventing the chemical solution from flowing out of the extension tube to the needle portion side in the lumen of the connection portion near the protrusion of the slide member. A flat disk-shaped valve body is provided, and the slide member is slid to the base side by resistance generated when the needle portion is punctured into the rubber-like elastic body, so that the protrusion of the slide member penetrates the valve body, and the needle portion is The lumen communicates with the extension tube to open the flow path of the drug solution from the extension tube to the co-injection section through the lumen of the needle, and slides due to the resistance generated when the needle is removed from the rubber-like elastic body. Slide the member to the tip side The protruding portion of the timber is removed from the valve body, the communication to the extension tube lumen of the needle part is blocked by the valve body,
The flow path of the chemical solution from the extension tube to the co-injection section is shut off.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a cross-sectional view of Embodiment 1 of the present invention, an external view of a Y-type liquid co-infusion device, an explanatory view of their operation, and an AA cross-sectional view. FIG.
The same reference numerals are given to the same parts as those of the conventional example described in, and the description is omitted.

In FIG. 1, reference numeral 1 denotes a connector connected to a co-injection port 52 which is a base end portion of a housing 51 constituting a main body of a Y-type liquid co-injection device, for example, a transparent plastic such as polycarbonate or slightly soft polypropylene. It is made of material. The connector 1 has a cap 57 whose inner diameter is fitted into the co-injection port 52 of the housing 51.
And a co-injection port 52 side of the housing 51 is slidably and rotatably fitted in the cylindrical body portion thereof, and two external threads provided on the outer wall of the housing 51. A hood portion 2 provided on the inner wall is provided with two inner threads 3 screwed into the inner portion 58 and a substantially central portion of the hood portion 2 outside the lid portion, and has a step portion 4b at a substantially central portion of the lumen 4a. A substantially cylindrical connecting portion 4 formed so that the distal portion side lumen 4a is slightly larger in diameter than the base portion side lumen 4a, and slidably fitted in the lumen 4a of the connecting portion 4; A slide body 5 provided with a needle portion 6 pierced in a rubber-like elastic body 56 for sealing a co-injection port 52 of a housing 51 on a distal end portion, and an extension tube 7 having a distal end portion connected to a connecting portion 4. It is configured.

The slide body 5 is made of, for example, a soft plastic, and has a through hole 5a near the base side which is orthogonal to the axial direction. The base body side of the needle part 6 communicates with the through hole 5a at a substantially central portion on the distal end side. A lumen 5b to be fitted is formed. In addition, a flange portion 5c is provided at the base distal end side to be locked to the base end portion of the connecting portion 4, and a locking portion 5d to be locked to the step portion 4b of the connecting portion 4 is formed at the distal end side. The flange portion 5c and the locking portion 5d serve as stoppers for sliding the slide body 5 toward the distal end and the base. When the connector 1 is not used, the slide body 5
As shown in FIG. 1A, the flange portion 5c is engaged with the base end of the connecting portion 4 and the through hole 5a is formed in the lumen 4a of the connecting portion 4.
It is positioned to be closed by a wall.

In the first embodiment configured as described above, when continuously infusing another drug solution during the infusion of the main drug solution, first, the base (not shown) of the indwelling needle placed in the blood vessel of the patient The distal end of the extension tube 68 is connected to
As shown by the arrow X in FIG.
7 to the inlet 55, which is the main route,
4 to the housing 51, and is administered to the patient side (blood vessel) from the outlet 53 of the housing 51 and the extension tube 68. Then, as shown in FIG. 1 (b), the needle portion 6 is attached to the rubber-like elastic body 56 at substantially the center of the rubber-like elastic body 56 while the hood portion 2 of the connector 1 is fitted to the co-injection port 52 side of the housing 51. The needle 6 is pierced along a slit provided vertically to the needle, and the tip of the needle 6 is
So as to be located in the lumen of the housing 51,
The inner screw 3 of the connector 1 is connected to the outer screw 58 of the housing 51.
And connect them.

At this time, the through hole 5a is
The slide body 5 positioned so as to be closed by the wall is retracted by the resistance force generated when the needle portion 6 is punctured with the rubber-like elastic body 56, that is, the base side (the direction of the arrow Y in FIG. 1B). And the locking portion 5d is connected to the step portion 4b of the connecting portion 4.
And is held in that position by the
The through hole 5a closed by the wall of the inner cavity 4a is opened and communicated with the extension tube 7.

Then, as shown by the arrow Z in FIG. 1B, another chemical solution from the extension tube 7 flows from the through hole 5a of the slide body 5 through the lumen of the needle portion 6 to the lumen of the housing 51. Feed, main chemical from main route and housing 51
The mixture is continuously mixed into the patient's side (blood vessel) from the outlet 53 and the extension tube 68 while being mixed in the lumen.

To end the continuous co-injection, the screw between the outer screw 58 of the housing 51 and the inner screw 3 of the connector 1 is loosened, and the connector 1 is pulled in a direction in which the needle portion 6 comes out of the rubber-like elastic body 56. break away. At this time, the slide body 5, which has been positioned so that the through-hole 5a communicates with the extension tube 7, advances due to the resistance generated when the needle portion 6 is removed from the rubber-like elastic body 56, that is, the distal end side (FIG. 1).
(The direction opposite to the arrow Y in (b)), the flange portion 5c is held at that position by being locked to the base end portion of the connecting portion 4, and the through-hole that has been opened by communicating with the extension tube 7 is provided. 5 a is closed by the wall of the lumen 4 a of the connecting portion 4, and the slide body 5 blocks the flow path of another chemical solution from the extension tube 7.

As described above, the connector 1 slides toward the base side due to the resistance generated when the needle portion 6 is punctured into the rubber-like elastic body 56, and the locking portion 5 d engages with the step portion 4 b of the connecting portion 4. When the needle portion 6 is removed from the rubber-like elastic body 56 while being held at that position by being stopped and opening the through-hole 5a closed by the wall of the lumen 4a of the connecting portion 4 to communicate with the extension tube 7, And the flange portion 5c is held at that position by locking the flange portion 5c to the proximal end portion of the connecting portion 4 so that the extension tube 7
The through hole 5a that has been opened to communicate with the
Since the slide body 5 that is closed by the wall a and blocks the flow path of the chemical solution from the extension tube 7 is provided, not only when the connection with the housing 51 is intentionally released but also when the connection is accidentally disconnected. However, the slide body 5 slides to the distal end side to close the through hole 5a with the wall of the inner cavity 4a of the connecting portion 4, and the flow path of another chemical solution from the extension tube 7 can be automatically shut off. . Thereby, since the connection can be released without performing an operation such as clamping and closing the extension tube 7 before intentionally releasing the connection, the disconnection operation of the connector 1 can be simplified, and Even when the connection is accidentally disconnected, the flow path is automatically cut off, and the convenient connector 1 without chemical liquid leakage can be obtained.

Embodiment 2 FIG. FIG. 2 is a cross-sectional view of Embodiment 2 of the present invention, an external view of a Y-type liquid co-infusion device and an explanatory diagram of their operation, and FIG. 3 is an enlarged view of a portion B in FIG.
In the sectional view taken along the line -C, in the second embodiment, instead of the slide body 5 of the first embodiment, the distal end side is fitted into the lumen 4a of the connecting portion 4 of the connector 1 according to the first embodiment, On the side, there is provided a connection portion 8 to which the extension tube 7 according to the first embodiment is coupled.

As shown in FIG. 3 (a), the connecting portion 8 is formed in a cylindrical shape with a bottom, and an insertion hole 8a through which the needle portion 6 according to the first embodiment is inserted is formed substantially at the center of the bottom. A needle portion 6 is slidably and rotatably inserted in the bottom portion of the connection portion 8 in the axial direction so as to be slidable and rotatable. The needle portion 6 is made of rubber or the like which prevents the chemical solution from flowing out of the extension tube 7 into the insertion hole 8a side. A seal valve body 9 made of an elastic body is provided. When the holding member 10 made of, for example, polypropylene or the like is fitted on the base side of the needle portion 6 inserted into the seal valve element 9 and the insertion hole 8a, and the connector 1 is used on the side wall near the holding member 10. The plurality of side holes 6 communicating with the lumen 8b of the connecting portion 8
a is provided. As shown in FIG. 3 (b), the holding member 10 has one of the opposing outer surfaces facing the lumen 8 b of the connection portion 8.
It is formed in an arc shape in contact with the wall, and the other opposing outer surface is formed in a substantially flat shape having a gap G between itself and the wall of the lumen 8b. Also, as shown in FIG. 3A, the distal end side of the holding member 10 is slightly reduced in diameter, and when the connector 1 is not used, the distal end side fits into the seal valve body 9,
The chemical solution from the extension tube 7 is prevented from flowing into the side hole 6a of the needle portion 6 through the gap G.

In the second embodiment configured as described above, similarly to the case described in the first embodiment, when another medicinal solution is continuously co-injected during the infusion of the main medicinal solution, FIG.
As shown in (b), while the hood portion 2 of the connector 1 is fitted to the co-injection port 52 side of the housing 51, the needle portion 6 is punctured in the rubber-like elastic body 56 along the slit, and the tip of the needle portion 6 The external thread 58 of the housing 51 is positioned so that the portion extends through the rubber-like elastic body 56 and is located in the lumen of the housing 51.
The inner screw 3 of the connector 1 is screwed into and connected. At this time, the needle portion 6 is held together with the holding member 10 by the resistance generated when the rubber-like elastic body 56 is punctured, and the base portion side (FIG. 3).
(In the direction of arrow Y in (a)), the side hole 6a of the needle portion 6 is located in the lumen 8b of the connecting portion 8 and communicates with the lumen 8b.

Then, as shown by an arrow Z in FIGS. 2B and 3A, another chemical solution from the extension tube 7 is supplied from the lumen 8b of the connecting portion 8 and the gap G to the side hole of the needle portion 6. 6a to the lumen of the needle part 6 and further to the lumen of the housing 51, and the main chemical solution from the main route and the housing 5
The mixture is continuously mixed into the patient side (blood vessel) from the outlet 53 and the extension tube 68 while being mixed in the first lumen.

When the continuous co-injection is completed, the screw between the outer screw 58 of the housing 51 and the inner screw 3 of the connector 1 is loosened, and the connector 1 is pulled in a direction in which the needle portion 6 comes off from the rubber-like elastic body 56. break away. At this time, the needle portion 6 slides with the holding member 10 toward the distal end (in the direction opposite to the arrow Y in FIG. 3A) due to the resistance generated when the needle member 6 is removed from the rubber-like elastic body 56. The distal end side is fitted into the seal valve body 9, and the side hole 6 a of the needle part 6 is located on the seal valve body 9 and the insertion hole 8 a side. Is cut off.

As described above, the connector 1 slides toward the base side by the resistance generated when the needle portion 6 is punctured into the rubber-like elastic body 56, and the side hole 6a of the needle portion 6 is positioned in the inner cavity 8b. The needle 6 is slid toward the distal end by the frictional resistance generated when the needle 6 is removed from the rubber-like elastic body 56, and the side hole 6 a of the needle 6 is sealed with the seal valve body 9. And the connection portion 8 is located on the side of the insertion hole 8a to prevent communication with the lumen 8b and the like, and to block the flow path of another chemical solution from the extension tube 7, so that the housing 51 When the connection with the connector 1 is released, it is possible to obtain the connector 1 that can automatically shut off the flow path of another chemical solution from the extension tube 7 with a simple operation.

Embodiment 3 FIG. 4 is a cross-sectional view of the third embodiment of the present invention, an external view of a Y-type liquid co-infusion device, a cross-sectional view of the same taken along line D-D, and an operation explanatory diagram thereof. Instead of the body 5, the distal end side is fitted into the lumen 4 a of the connecting portion 4 of the connector 1 according to the first embodiment, and the extension tube 7 according to the first embodiment is inserted into the base side.
(Not shown), and a slide member 11 having a needle portion 6 according to the first embodiment at the distal end side of the lumen 14a, a spring holding member 12, and an intervening member between the two. A connection portion 14 having a spring member 13 to be mounted is provided.

The slide member 11 is formed in a substantially T-shaped cross section, and has a through hole 11a perpendicular to the axial direction at the head thereof. The slide member 11 communicates with the through hole 11a at a substantially central portion of the shaft portion. A lumen 11b into which the base side is fitted is formed,
A pair of O-rings 15, 1 are provided inside the through hole 11a in the head.
The O-rings 15 and 15 prevent communication of the through hole 11a with the lumen 14a of the connection portion 14 when the connector 1 is not used. Further, the lower surface 11c of the head abuts and is locked by contacting the first step portion 14b formed in the lumen 14a of the connection portion 14, and serves as a stopper for sliding the slide member 11 toward the distal end portion. I have.

The spring holding member 12 is formed in a substantially convex cross section having a concave portion 12a on the bottom, and the lower surface of the collar portion 12b is formed on a second step portion 14c formed in the lumen 14a of the connecting portion 14. The spring holding member 12 is held in contact therewith and held in that position. Further, as shown in FIG. 4B, an extension tube 7 is provided on the collar portion 12b of the spring holding member 12.
Are provided with a plurality of passage holes 12c through which other chemicals pass.

The spring member 13 has one end coupled to the upper surface of the head of the slide member 11 and the other end coupled to the bottom of the concave portion 12a of the spring holding member 12, and the slide member 11 is connected to the distal end. It is urged to the part side.

In the third embodiment configured as described above, similarly to the case described in the first embodiment, when another medicinal solution is continuously co-injected during the infusion of the main medicinal solution, FIG.
As shown in (c), the needle portion 6 is pierced along the slit into the rubber-like elastic body 56 while the hood portion 2 of the connector 1 is fitted to the co-injection port 52 side of the housing 51. The external thread 58 of the housing 51 is positioned so that the portion extends through the rubber-like elastic body 56 and is located in the lumen of the housing 51.
The inner screw 3 of the connector 1 is screwed into and connected. At this time, the slide member 11, which has been urged toward the distal end by the spring member 13, compresses the spring member 13 by a resistance force generated when the needle portion 6 punctures the rubber-like elastic body 56, while compressing the spring member 13 (see FIG. 4 (c), the through hole 11a is opened and communicated with the lumen 14a of the connecting portion 14 and the through hole 12c of the spring holding member 12.

Then, as shown by an arrow Z in FIG. 4 (c), another chemical solution from the extension tube 7 is supplied from the lumen 14a of the connecting portion 14 and the through hole 12c of the spring holding member 12 through the through hole 11a. It is sent to the lumen of the needle part 6 and further sent to the lumen of the housing 51, and mixed with the main drug solution from the main route in the lumen of the housing 51 from the outlet 53 and the extension tube 68 to the patient side (blood vessel). Continue to co-inject.

To end the continuous co-injection, the screw between the outer screw 58 of the housing 51 and the inner screw 3 of the connector 1 is loosened, and the connector 1 is pulled in a direction in which the needle portion 6 comes out of the rubber-like elastic body 56. break away. At this time, the sliding member 11 slides toward the distal end (in the direction opposite to the arrow Y in FIG. 4C) due to the resistance force generated when the needle portion 6 is removed from the rubber-like elastic body 56 and the urging force of the spring member 13. Move, through hole 1
1a is the lumen 1 of the connecting portion 14 by the O-rings 15, 15.
Communication with the extension tube 4a is blocked, and the flow path of another chemical solution from the extension tube 7 is blocked.

As described above, the connector 1 is slid toward the base side by the resistance generated when the needle portion 6 is punctured into the rubber-like elastic body 56, and the through hole 11a of the slide member 11 is opened to release the spring holding member. The needle 11 is slid toward the distal end by the resistance force generated when the needle portion 6 is removed from the rubber-like elastic body 56 and the urging force of the spring member 13, and the through-hole 11 a is moved through the O-ring 15. , 15 to prevent communication of the connecting portion 14 with the lumen 14 a and to block the flow path of another chemical solution from the extension tube 7.
To obtain the connector 1 that can automatically and reliably shut off the flow path of another chemical solution from the extension tube 7 when the connection with the housing 51 is intentionally and accidentally released. Can be.

Embodiment 4 FIG. FIG. 5 is a cross-sectional view of a fourth embodiment of the present invention, an external view of a Y-type liquid co-infusion device, and an explanatory diagram of the operation thereof. In the fourth embodiment, a connecting portion 14 according to the third embodiment includes a spring. The holding member 12 and the spring member 13 are omitted, and instead of the slide member 11 having a substantially T-shaped cross-section, the cross-section is substantially cross-shaped having an acute-angled protruding portion 16a at the head, and the base of the needle portion 6 is provided substantially at the center thereof. A flat disk-shaped valve made of an elastic body such as rubber, having a slide member 16 having a lumen 16b into which a side is inserted, and having a slit 17a in an axial direction substantially in the middle of the lumen 14a of the connection portion 14. The body 17 is fitted, and when the connector 1 is not used, the valve body 17 blocks the flow path of another chemical solution from the extension tube 7.

Incidentally, the valve element 17 is connected to the lumen 14a of the connecting portion 14.
The extension tube 7 is held in that position by a substantially cylindrical valve holding member 18 fitted on the base side, and is fitted into the lumen of the valve holding member 18 and joined thereto. The lower surface 16c of the head of the slide member 16 is
Abuts against and locks with a first stepped portion 14b formed in a bore 14a of the slide member 16 and serves as a stopper for sliding the slide member 16 toward the distal end. Abuts against the lower surface of the slide member 16 and serves as a stopper for sliding the slide member 16 toward the base.

In the fourth embodiment configured as described above, similarly to the case described in the third embodiment, when another drug solution is continuously co-injected during the infusion of the main drug solution, as shown in FIG.
As shown in (b), while the hood portion 2 of the connector 1 is fitted to the co-injection port 52 side of the housing 51, the needle portion 6 is punctured in the rubber-like elastic body 56 along the slit, and the tip of the needle portion 6 The external thread 58 of the housing 51 is positioned so that the portion extends through the rubber-like elastic body 56 and is located in the lumen of the housing 51.
The inner screw 3 of the connector 1 is screwed into and connected. At this time, the slide member 16 located on the distal end side of the connecting portion 14 is caused to have a resistance force generated when the needle portion 6 is punctured into the rubber-like elastic body 56, so that the base member side (arrow Y in FIG. 5B). Direction) and the projection 16a is
a, and the upper surface 16d of the head is held at that position by being locked to the lower surface of the valve body 17, so that the needle portion 6
Is communicated with the extension tube 7.

Then, as shown by an arrow Z in FIG. 5 (b), another chemical solution from the extension tube 7 is sent from the lumen of the needle portion 6 to the lumen of the housing 51, and the main chemical solution from the main route and the housing Outlet 53 while mixing in the lumen of 51
And, it is continuously co-injected from the extension tube 68 to the patient side (blood vessel).

To end the continuous co-injection, the screw between the outer screw 58 of the housing 51 and the inner screw 3 of the connector 1 is loosened, and the connector 1 is pulled in a direction in which the needle portion 6 comes out of the rubber-like elastic body 56. break away. At this time, the slide member 16 located on the base side of the connection portion 14 is caused to resist when the needle portion 6 is pulled out of the rubber-like elastic body 56, and the slide member 16 is positioned on the tip end side (arrow Y in FIG. 5B). (In the opposite direction), the protrusion 16a is pulled out of the valve body 17, and the lower surface 16c of the head is removed.
Is held in that position by engaging with the first step portion 14 b of the connecting portion 14, and the lumen of the needle portion 6 is prevented from communicating with the extension tube 7 by the valve body 17,
The flow path of the other chemical solution from is shut off.

As described above, the connector 1 slides toward the base side due to the resistance generated when the needle 6 is pierced into the rubber-like elastic body 56, and the protrusion 16 a penetrates through the valve body 17 and penetrates the needle 6. Is communicated with the extension tube 7, and the needle portion 6 slides toward the distal end side by resistance generated when the needle portion 6 is removed from the rubber-like elastic body 56, and the protrusion 16a
The valve body 17 prevents the needle portion 6 from communicating with the extension tube 7 in the lumen of the needle portion 6, and the connection portion 14 for blocking the flow path of another chemical solution from the extension tube 7 is provided. When the connection with the housing 51 is accidentally released, it is possible to obtain the connector 1 that can automatically and reliably shut off the flow path of another chemical solution from the extension tube 7.

Embodiment 5 6 is an external view of a fifth embodiment of the present invention, an external view of an injection connector, and an EE cross-sectional view of the fifth embodiment of the present invention. FIG. 7 is a diagram showing a fifth embodiment of the present invention and an injection connector. And FIG.
It is F sectional drawing. In the figure, reference numeral 21 denotes an infusion connector 3 connected to, for example, a proximal end of a catheter (not shown).
1 and the like, and is made of, for example, a transparent plastic material such as polycarbonate or slightly soft polypropylene.

The connector 21 is formed in a closed cylindrical shape whose inner diameter is substantially equal to the outer diameter of the base of the housing 32 of the injection connector 31, and the housing 3 is provided in the cylindrical body.
Hood 22 into which base 2 is slidably and rotatably fitted
Is provided at a substantially central portion outside the lid portion of the hood portion 22,
A connecting portion 23 formed in a female luer shape having a step 23b near the distal end of the lumen 23a;
a, slidably fitted in the end portion 24a
A plurality of side holes 24b which are formed in a needle shape with the outer diameter of the outer wall of which is reduced toward the distal end, and which are closed on the side wall near the base side by the inner wall 23a of the connecting portion 23 when the connector 21 is not used. Blunt needle portion 2 having a locking claw 24c for locking the step portion 23b of the connecting portion 23 at a substantially middle portion of the side wall.
4 is provided. A substantially T-shaped groove portion 25c is provided at the tip end of the body of the hood portion 22, and a locking hole 25a is provided at an end of the groove branched at a substantially middle portion thereof, and an engagement hole is provided at an upper end portion. An engagement portion 25 forming a portion 25b is provided.

The housing 32 of the injection connector 31
Have an inlet 33a and an outlet 33b at both ends in the lumen.
Are provided integrally with each other, and a slit is provided between the injection port 33a and the lumen base side, and is provided substantially vertically at a center portion thereof. A rubber-like elastic body 34 into which the portion 24 is punctured is fixed. A projection 32b that is engaged with the engagement portion 25 of the connector 21 is provided on an outer wall of the base of the housing 32.
When the projection 32b is fitted into the groove 25c of the engaging portion 25 and locked in the locking hole 25a, the distal end portion 24a of the blunt needle portion 24 of the connector 21 has a rubber-like elastic body 34. The distal end portion 24a is fitted into the injection port 33a of the tubular hollow body 33, and that state is maintained. Also,
On the inner wall of the housing 32 on the distal end side of the lumen, for example, a screw portion 32c for connecting to the proximal end of the catheter is provided.

In the fifth embodiment configured as described above, when infusion of the main drug solution is performed, as shown in FIG.
A hood portion 22 of a connector 21 having an extension tube (not shown) connected to a connection portion 23 is fitted to a base portion of a housing 32 of an infusion connector 31 connected to a base end portion of a catheter placed in a blood vessel of a patient. At this time, the distal end portion 24a of the blunt needle portion 24 is punctured in the rubber-like elastic body 34 along the slit, and the protrusion 32b of the injection connector 31 is locked in the locking hole 25a of the engaging portion 25 of the connector 21. Then, the distal end portion 24a of the blunt needle portion 24 is connected to the injection port 33a of the cylindrical hollow body 33.
To be maintained.

At this time, the side hole 24b is
The blunt needle portion 24 positioned so as to be closed by the wall 3a slides toward the base side (in the direction of the arrow Y in FIG. 7B) due to the resistance generated when the rubber-like elastic body 56 is punctured. The locking claw 24c is held at that position by being locked to the stepped portion 23b of the connecting portion 23, and the inner cavity 2 of the connecting portion 23 is
The side hole 24b closed by the wall 3a is opened and communicated with an extension tube (not shown) connected to the connecting portion 23.

Then, as shown by the arrow Z in FIG. 7B, the main solution from the extension tube is supplied to the side hole 24 of the blunt needle portion 24.
From b, it is sent to the lumen of the tubular hollow body 33 through the lumen of the blunt needle portion 24, and is injected into the patient side (blood vessel) from the outlet 33b of the tubular hollow body 33 and the catheter.

When the infusion is completed, the engagement between the protrusion 32b of the injecting connector 31 and the engaging hole 25a of the engaging portion 25 of the connector 21 is released, and the distal end 2 of the blunt needle portion 24 is released.
4a in the direction in which the connector 2a comes out of the rubber-like elastic body 34.
Pull 1 off. At this time, the blunt needle portion 24 positioned so that the side hole 24b communicates with the extension tube is caused by the resistance generated when the blunt needle portion 24 is pulled out of the rubber-like elastic body 34 (arrow Y in FIG. 7B). The opposite direction)
The side hole 24b communicated with and opened to the extension tube is closed by the wall of the lumen 23a of the connecting portion 23, and the flow path of the main solution from the extension tube is blocked.

As described above, the connector 2 has the tip 2
4a slides toward the base side due to the resistance force generated when the rubber-like elastic body 34 is punctured, and the locking claw 24c is held at that position by being locked to the step 23b of the connecting portion 23, and the connecting portion 23 The side hole 24b closed by the wall of the inner cavity 23a is opened to communicate with the extension tube connected to the connecting portion 23, and the distal end portion 24a is connected to the rubber-like elastic body 3.
4 slides toward the distal end due to the resistance force generated when the side hole 24 is removed from the side hole 24 that has been opened.
b is closed by the wall of the lumen 23a of the connecting portion 23 and the blunt needle portion 24 for blocking the flow path of the drug solution from the extension tube is provided, so that the connection with the injection connector 31 is intentionally and accidentally released. In this case, a convenient connector 21 that can automatically shut off the flow path of the chemical solution from the extension tube connected to the connecting portion 23 can be obtained.

In the above embodiment, the connector 1
Was connected to the Y-type liquid co-infusion device, and the connector 21 was connected to the injection connector 31.
Connect Connector 1 to Injection Connector 31 and Connector 2
1 may be connected to a Y-type liquid co-infusion device, and the same effect is obtained.

[0056]

As described above, the connector according to the present invention has a needle portion in a lumen, and a liquid medicine flow in which a rubber-like elastic body is cut off from the outside at the base end portion and the needle portion is punctured. In the connector detachably and slidably and rotatably connected to the base end of the co-injection unit having the inlet, the needle retracts when the connector is attached to the co-infusion unit to open the flow path of the drug solution, When the connector is detached from the co-injection section, the needle advances and cuts off the flow path of the chemical solution, so if the connection is intentionally released or if the connection is accidentally disconnected, the needle A connector capable of preventing leakage of a chemical solution can be obtained.

The connector according to the present invention is a connector which is detachably and slidably and rotatably connected to a base end of a co-injection unit having a chemical liquid inlet attached thereto, wherein a needle is provided at a distal end. The needle is slid toward the base side by the resistance generated when the needle is punctured into the rubber-like elastic body, thereby opening the flow path of the drug solution from the extension tube connected to the base side to the co-infusion section, and A sliding means is provided on the base side for sliding the needle part toward the distal end part by the resistance force generated when the part is removed from the rubber-like elastic body to cut off the flow path of the drug solution from the extension tube to the co-injection part. Even if the connection is accidentally disconnected, the sliding means can automatically slide by the resistance force of the rubber-like elastic body to cut off the channel of the chemical solution, thereby preventing leakage of the chemical solution from the needle portion. be able to.

The connector according to the present invention comprises a cylindrical hood portion detachably and slidably and rotatably fitted to the outside of the base end portion of the co-injection portion, and a substantially central portion outside the lid portion of the hood portion. And a substantially cylindrical connecting portion to which the extension tube is connected, and a sliding means slidably fitted in the lumen of the connecting portion. A connector capable of preventing leakage of a chemical solution can be obtained.

In the connector according to the present invention, the sliding means comprises:
A needle body having a through hole near the base side and having a through hole orthogonal to the axial direction, and having a lumen in which the base side of the needle part is inserted into the through hole at substantially the center of the tip part side, The slide body is slid toward the base side by the resistance generated when the rubber-like elastic body is punctured to communicate the through hole with the extension tube, and the flow path of the drug solution from the extension tube to the co-injection section is formed through the through hole and the needle portion. While opening through the lumen of, the slide body is slid toward the distal end side by the resistance generated when the needle part is removed from the rubber-like elastic body, and the through hole is closed by the lumen wall of the connecting part, The flow path of the chemical solution from the extension tube to the co-injection section is cut off, so that even if the connection is accidentally disconnected, the slide body slides toward the tip due to the resistance of the rubber-like elastic body, and the through hole Occluded by the lumen wall of the connection, and Other can be automatically shut off the flow path of the liquid medicine, it can be obtained good connector free of a drug solution leaks usability.

Further, in the connector according to the present invention, the sliding means is constituted by a blunt needle portion having a cylindrical shape with a cover, a tip portion formed in a needle shape, and a plurality of side holes in a side wall near the base portion.
The blunt needle is slid toward the base side by the resistance generated when the needle-like tip is punctured into the rubber-like elastic body, the side hole communicates with the extension tube, and the flow path of the drug solution from the extension tube to the co-injection section Through the side hole and the lumen of the blunt needle,
The blunt needle is slid toward the distal end by the resistance generated when the needle-like distal end is removed from the rubber-like elastic body, the side hole is closed by the lumen wall of the connecting part, and from the extension tube to the co-injection part When the connection is intentionally and accidentally disconnected, the blunt needle is slid toward the distal end by the resistance force of the rubber-like elastic body so that the flow of the chemical solution is interrupted. The road can be automatically cut off, and a convenient connector can be obtained.

Further, in the connector according to the present invention, since the holding means for holding the positions slid toward the base side and the tip side of the blunt needle section is provided at the base end of the hood section and the co-injection section. Even the blunt needle portion which is easily pulled out by the resistance force of the elastic body can be reliably held at the slid position.

The connector according to the present invention includes a cylindrical hood portion detachably and slidably and rotatably fitted to the outside of the base end portion of the co-injection portion, and a substantially central portion outside the lid portion of the hood portion. And a distal end portion is fitted into the lumen of the coupling portion, an extension tube is connected to the proximal end portion, and a sliding means is slidably fitted in the lumen. Since the connector is constituted by the connecting portion, it is possible to obtain a connector that can prevent leakage of the chemical solution from the needle portion with a simple structure.

In the connector according to the present invention, the connecting portion is formed in a bottomed cylindrical shape having an insertion hole through which the needle portion is inserted substantially at the center of the bottom portion, and the needle portion slides in the axial direction inside the bottom portion. While providing a seal valve body that is rotatably inserted and that prevents the chemical solution from the extension tube from flowing out to the insertion hole side,
The base of the needle portion is fitted into the sliding means at a substantially central portion on the distal end side, and one of the opposed outer surfaces has an arc shape in contact with the inner wall of the connecting portion, and the other opposed outer surface has the connecting portion. A holding member formed in a substantially flat shape having a gap between the inner wall of the needle and a plurality of side holes provided in a side wall of the needle portion near the holding member, and the needle portion is formed into a rubber-like elastic body. The holding member is slid to the base side by the resistance force generated when puncturing, the side hole is positioned closer to the base side than the seal valve body, communicates with the extension tube via the gap, and the flow of the drug solution from the extension tube to the co-injection portion. The passage is opened through the side hole and the lumen of the needle portion, and the holding member is slid toward the distal end portion by the resistance generated when the needle portion is removed from the rubber-like elastic body, so that the side hole is sealed in the seal valve body. Or, it is located on the tip side to prevent communication with the extension tube, Since so as to block the flow path of the liquid medicine to Luo mixed injection unit, even when an accident connected is released,
It is possible to obtain a connector that slides the holding member toward the distal end portion by the resistance force of the rubber-like elastic body and can easily and automatically shut off the flow path of the chemical solution.

In the connector according to the present invention, the connecting portion is formed in a substantially cylindrical shape, and the sliding means has a through hole near the base portion in the axial direction orthogonal to the base portion. A substantially T-shaped cross-section is provided with a lumen that communicates with the through hole and has a base portion of the needle portion fitted therein, and a seal member that prevents inflow of the drug solution from the extension tube into the through hole is provided inside the through hole. A slide member, a spring holding member having a substantially convex cross section provided with a plurality of passage holes through which a chemical solution from the extension tube passes in the collar portion, and a slide member interposed between the slide member and the spring holding member. And a spring member that urges the needle portion toward the distal end side, and slides the slide member toward the base side while compressing the spring member by a resistance force generated when the needle portion is pierced into the rubber-like elastic body to form the through hole. Extends through the through hole of the spring holding member And the flow path of the drug solution from the extension tube to the co-injection section is opened through the through-hole and the lumen of the needle section, and a resistance force and a spring member generated when the needle section is removed from the rubber-like elastic body. As the slide member was slid toward the distal end by the urging force of the above, the through-hole was closed by the inner wall of the seal member and the connecting portion, and the flow path of the drug solution from the extension tube to the co-injection portion was cut off. Even if the connection is accidentally released, a connector that can slide the slide member toward the tip end side by the resistance force of the rubber-like elastic body and automatically and reliably shut off the flow path of the chemical solution is obtained. Can be.

Further, in the connector according to the present invention, the connecting portion is formed in a substantially cylindrical shape, and the sliding means has a sharp projection at the base end, and the base side of the needle is fitted substantially at the center. A slide member having a substantially cross-shaped cross section having a bore formed therein, and comprising an elastic body for preventing the chemical solution from flowing out of the extension tube to the needle portion side in the lumen of the connection portion near the protrusion of the slide member. A flat disk-shaped valve body is provided, and the slide member is slid to the base side by resistance generated when the needle portion is punctured into the rubber-like elastic body, so that the protrusion of the slide member penetrates the valve body, and the needle portion is The lumen communicates with the extension tube to open the flow path of the drug solution from the extension tube to the co-injection section through the lumen of the needle, and slides due to the resistance generated when the needle is removed from the rubber-like elastic body. Slide the member to the tip side The protruding portion of the timber is removed from the valve body, the communication to the extension tube lumen of the needle part is blocked by the valve body,
Since the flow path of the chemical solution from the extension tube to the co-injection section is cut off, even if the connection is accidentally released, the slide member slides to the distal end side due to the resistance force of the rubber-like elastic body, and the valve element As a result, it is possible to obtain a connector capable of automatically and reliably shutting off the channel of the chemical solution.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment of the present invention, an external view of a Y-type liquid co-infusion device, an explanatory diagram of their operation, and an AA cross-sectional view.

FIG. 2 is a cross-sectional view of a second embodiment of the present invention, an external view of a Y-type liquid co-infusion device, and an explanatory diagram of their operation.

3 is an enlarged view of a portion B in FIG. 2 and a cross-sectional view taken along the line CC of FIG.

FIG. 4 is a cross-sectional view of a third embodiment of the present invention, an external view of a Y-type liquid co-infusion device, a cross-sectional view taken along line D-D, and an explanatory diagram of their operation.

FIG. 5 is a cross-sectional view of a fourth embodiment of the present invention, an external view of a Y-type liquid co-infusion device, and an explanatory diagram of their operation.

FIG. 6 is an external view of a fifth embodiment of the present invention, an external view of an injection connector, and an EE cross-sectional view of the fifth embodiment of the present invention.

FIG. 7 is an operation explanatory view of the fifth embodiment of the present invention and an injection connector, and a sectional view taken along line FF of FIG.

FIG. 8 is an external view showing a cross section of a part of a conventional typical Y-type liquid co-injection device and a connector used for connection thereto, and an operation explanatory diagram thereof.

[Explanation of symbols]

 1, 21 connector 2, 22 hood part 4, 23 connecting part 4a, 23a lumen 5 slide body 5a through hole 5b lumen 6 needle part 6a side hole 7 extension tube 8, 14 connection part 8a insertion hole 8b lumen 9 seal Valve body 10 Holding member 14a Lumen 11, 16 Slide member 11a Through hole 11b Lumen 12 Spring holding member 12b Collar part 12c Passing hole 13 Spring member 15 O-ring 16a Projection 16b Lumen 17 Valve body 17a Slit 24 Blunt needle part 24a Tip part 24b Side hole 25 Engagement part 31 Injection connector 32b Projection part 33a Injection port 34,56 Rubber-like elastic body 52 Mixed injection port G Gap

Claims (10)

[Claims] 1. A base end of a co-injection unit having a needle portion in a lumen, and a drug solution inlet provided at a base end portion of which a rubber-like elastic body which is isolated from the outside and which punctures the needle portion is attached. A connector that is detachably connected to the portion and that is slidably and rotatably connected, the needle portion retreats when the connector is attached to the co-injection portion to open a flow path of a drug solution, and the connector is connected to the co-infusion portion. A connector that moves forward when the needle is disengaged from the connector and cuts off a channel for a chemical solution. 2. A base end of a co-injection unit having a needle portion in a lumen, and a drug solution inlet provided at a base end portion of which a rubber-like elastic body which is isolated from the outside and punctures the needle portion is attached. A connector detachably and slidably and rotatably connected to a portion, wherein the needle portion is provided at a distal end portion, and the needle portion is formed into a base portion by a resistance force generated when the needle portion is punctured into the rubber-like elastic body. Side to open the flow path of the drug solution from the extension tube connected to the base side to the co-injection part, and the needle part is formed by resistance generated when the needle part is removed from the rubber-like elastic body. A connector provided on a base side of the base member for sliding a liquid passage from the extension tube to the co-injection section by sliding the base member toward the distal end. 3. A lid-shaped cylindrical hood portion detachably and slidably and rotatably fitted to the outside of the base end portion of the co-injection portion,
A substantially cylindrical connecting portion provided at a substantially central portion outside the lid portion of the hood portion and connected to the extension tube; and the sliding means slidably fitted in a lumen of the connecting portion. 3. The connector according to claim 2, wherein the connector comprises: 4. A lumen in which the sliding means has a through hole in the vicinity of the base side and which is orthogonal to the axial direction, communicates with the through hole at a substantially central part on the tip side, and the base side of the needle is fitted therein. The slide body is slid to the base side by a resistance force generated when the needle portion is punctured into the rubber-like elastic body, and the through hole communicates with the extension tube, The flow path of the drug solution from the extension tube to the co-injection section is opened through the through hole and the lumen of the needle section, and the slide force is generated by removing the needle section from the rubber-like elastic body. The body is slid toward the distal end to close the through-hole with a lumen wall of the connecting portion, and cut off a flow path of the drug solution from the extension tube to the co-injection portion. Item 3. The connector according to Item 3. 5. The sliding means comprises a blunt needle portion having a cylindrical shape with a cover and a tip end side formed in a needle shape and having a plurality of side holes in a side wall near a base side, wherein the needle-like tip end portion is formed by a needle. The blunt needle portion is slid toward the base side by the resistance generated when the rubber-like elastic body is punctured, the side hole communicates with the extension tube, and the flow path of the drug solution from the extension tube to the co-injection portion is formed. While opening through the side hole and the lumen of the blunt needle part,
The blunt needle portion is slid toward the distal end portion side by resistance generated when the needle-like distal end portion is removed from the rubber-like elastic body, and the side hole is closed by a lumen wall of the connecting portion, The connector according to claim 3, wherein a flow path of the chemical solution from the extension tube to the co-injection section is blocked. 6. A holding means for holding, at the base end of the hood and the co-injection part, the positions of the blunt needle slid toward the base and the tip thereof. Connector. 7. A lid-shaped cylindrical hood portion detachably and slidably and rotatably fitted to the outside of the base end portion of the co-injection portion,
A substantially cylindrical connecting portion provided at a substantially central portion outside the lid portion of the hood portion, a distal end portion is fitted into a lumen of the connecting portion, and the extension tube is connected to a proximal end portion. 3. The connector according to claim 2, wherein said connector comprises a connecting portion in which said sliding means is slidably fitted in said cavity. 8. The connecting portion is formed in a bottomed cylindrical shape having an insertion hole through which the needle portion is inserted substantially at the center of the bottom portion, and the needle portion slides and rotates in the axial direction inside the bottom portion. A seal valve body that is inserted so as to be able to pass therethrough and prevents the chemical solution from the extension tube from flowing out to the insertion hole side, and the base of the needle part is fitted into the sliding means at a substantially central part on the distal end side. One of the opposing outer surfaces is formed in an arc shape abutting on the lumen wall of the connecting portion, and the other opposing outer surface is formed in a substantially flat shape having a gap between the opposing outer surface and the lumen wall of the connecting portion. Further, a plurality of side holes are provided in a side wall of the needle portion near the holding member, and the holding member is formed by a resistance force generated when the needle portion is punctured into the rubber-like elastic body. Side of the seal valve so that the side hole is closer to the base side than the seal valve body. The extension tube is communicated with the extension tube through the gap, and the flow path of the drug solution from the extension tube to the co-injection unit is opened through the side hole and the lumen of the needle unit. The holding member is slid toward the distal end portion by a resistance force generated when the extension tube is removed from the body to position the side hole in the seal valve body or the distal end portion, thereby preventing communication with the extension tube, and 8. The connector according to claim 7, wherein a flow path of the chemical solution from the to the co-injection section is blocked. 9. The connecting portion is formed in a substantially cylindrical shape, and the sliding means has a through hole orthogonal to the axial direction in the vicinity of the base portion, and communicates with the through hole in a substantially central portion on the distal end side. A slide having a substantially T-shaped cross-section, having a lumen in which the base side of the needle portion is fitted, and having a seal member provided inside the through-hole to prevent a chemical solution from flowing from the extension tube into the through-hole. A member, a spring holding member having a substantially convex cross section provided with a plurality of passage holes through which the chemical solution from the extension tube passes in the collar portion, and is interposed between the slide member and the spring holding member, A spring member that urges the slide member toward the distal end side, wherein the slide member is moved toward the base side while compressing the spring member by a resistance force generated when the needle portion is punctured into the rubber-like elastic body. Slide the through hole The extension tube communicates with the extension tube through a through hole of the spring holding member, and the flow path of the chemical solution from the extension tube to the co-injection unit is opened through the through hole and the lumen of the needle unit. The slide member is slid toward the distal end by the resistance force generated when the rubber member is removed from the rubber-like elastic body and the urging force of the spring member, and the through hole is closed by the inner wall of the seal member and the connection portion. 8. The connector according to claim 7, wherein a flow path of the chemical solution from the extension tube to the co-injection section is shut off. 10. A connecting part having a substantially cylindrical shape, said sliding means having a sharp projection at a base end thereof, and an inner cavity into which a base side of said needle is fitted at a substantially central part. A flat surface formed of a slide member having a substantially cross-shaped cross section and configured to prevent a chemical solution from flowing out from the extension tube to the needle portion side in the lumen of the connection portion near the protrusion of the slide member. A disc-shaped valve body is provided, and the slide member is slid toward the base side by a resistance force generated when the needle portion is punctured into the rubber-like elastic body, so that the protrusion of the slide member penetrates through the valve body. Communicating the lumen of the needle portion with the extension tube to open the flow path of the drug solution from the extension tube to the co-injection portion through the lumen of the needle portion, and disposing the needle portion with the rubber-like elasticity. Due to the resistance generated when the body is removed from the body, The guide member is slid toward the distal end to remove the protrusion of the slide member from the valve body, and the communication of the inner cavity of the needle portion with the extension tube is prevented by the valve body. The connector according to claim 7, wherein a flow path of the chemical solution to the co-injection section is blocked.