WO2006103792A1

WO2006103792A1 - Connector

Info

Publication number: WO2006103792A1
Application number: PCT/JP2005/010376
Authority: WO
Inventors: Seiichi Iida
Original assignee: Kabushiki Kaisha Top
Priority date: 2005-03-28
Filing date: 2005-06-06
Publication date: 2006-10-05
Also published as: TW200633739A; CN100520145C; MY142872A; CN101133278A; JPWO2006103792A1; JP4708423B2; TWI353858B

Abstract

A connector capable of reliably preventing contact of chemical liquid, poured from a syringe, with outside air and leakage of the liquid. The connector has a sleeve member (2) provided with a large diameter section (4) fitted on an opening (12c) of piping (11) and with a small diameter section (5) communicated with the large diameter section (4), and has a valve body (3) constituted of a tubular section (9) and a bottom section (10) and having a slit-like valve hole (10a) formed in the a bottom section (10). The valve body (3) is received in the sleeve member (2) and the large diameter section (4) is fitted on the opening (12c), by which the valve body (3) is pressed to the opening (12c) to seal it. The valve hole (10a) is opened when a tube head section (22) of the syringe (21) is inserted into the valve hole (10a), and the opening (12c) and the syringe (21) are connected in a liquid-tight manner when the opened valve hole (10a) is in tight contact with the tube head section (22). The sleeve member (2) has a tapered section (6) for connecting the large diameter section (4) and the small diameter section (5), and ribs (7) are arranged on the inner peripheral surface of the large diameter section (4). The sleeve member (2) has a male thread section (8) on the outer peripheral surface of the small diameter section (5). The piping (11) is a three-way cock.

Description

Specification

Connectors

Technical field

[0001] The present invention relates to a connector for connecting an opening of a pipe such as a three-way stopcock and a syringe.

Background art

Conventionally, using one of the openings of a three-way cock connected to an infusion line or the like as a connection port, a liquid medicine or the like is mixedly injected into the infusion line from a syringe connected to the connection port. . At this time, the opening of the three-way stopcock and the syringe need to be liquid-tightly connected, and the liquid medicine injected into the infusion line from the syringe lid comes into contact with the outside air or causes liquid leakage. There must be no ヽ.

[0003] Therefore, a connector described in, for example, US Pat. No. 6,036,171 is known as a connector for liquid-tightly connecting the three-way cock and the syringe. As shown in FIG. 4, the connector 31 described in the specification includes a cylindrical sleeve member 32 that is externally fitted to the opening 12c of the three-way stopcock 11, and a sleeve member 32 that is built in and seals the opening 12c. And a valve body 3 to be operated.

[0004] The valve body 3 is an elastic body made of a soft synthetic resin, for example. The sleeve member 32 of the connector 31 includes a large-diameter portion 4 that is externally fitted to the opening 12c, and a small-diameter portion 5 that communicates with the large-diameter portion 4. The large-diameter portion 4 and the small-diameter portion 5 are connected to each other. A step 33 is formed between them.

[0005] The connector 31 is attached to the three-way stopcock 11 by fitting the large-diameter portion 4 of the sleeve member 32 into the opening 12c. By rubbing in this way, the valve body 3 is made of a soft synthetic resin. Therefore, the opening end portion 9a of the cylindrical portion 9 is pressed against the opening portion 12c to be intimately adhered, and the opening portion 12c is formed by the valve body 3. Sealed.

On the other hand, when the connector 31 is attached to the three-way cock 11, the bottom portion 10 of the valve body 3 is press-fitted into the small diameter portion 5 of the sleeve member 32 and is fitted therein. In this state, the slit 10a provided in the bottom 10 is normally closed. However, when the tube tip portion of the syringe (not shown) is inserted, the slit 10a is opened and is in close contact with the tube tip portion. As a result, the opening 12c and the syringe are liquid-tightly connected by the connector 31.

[0008] Since the valve body 3 is made of the soft synthetic resin, the grease is deteriorated by repeatedly inserting and removing the tube tip portion of the syringe, or the tube tip portion is left inserted for a long time. This has the disadvantage of reducing the elasticity by causing creep deformation of the resin. When the elasticity of the resin forming the valve body 3 is lowered, the valve body 3 is pushed into the large diameter portion 4 of the sleeve member 32 and inserted into the small diameter portion 5 when the cylindrical tip of the syringe is inserted. The fitted state cannot be restored, or the valve body 3 is inclined inside the sleeve member 32. As a result, a gap is formed between the opening end 9a and the opening 12c of the cylindrical portion 9 or between the slit 10a and the cylindrical tip portion of the syringe, and the liquid medicine that is also injected with the syringe force comes into contact with the outside air. There is a concern that liquid leakage may occur.

Disclosure of the invention

Problems to be solved by the invention

[0009] In view of the above problems, an object of the present invention is to provide a connector that can reliably prevent a chemical liquid injected from a syringe cartridge from coming into contact with outside air or causing liquid leakage. .

Means for solving the problem

In order to achieve such an object, the present invention provides a cylindrical sleeve member having a large-diameter portion that is externally fitted to an opening of a pipe and a small-diameter portion that communicates with the large-diameter portion, and a cylindrical portion And a bottom that closes one end of the cylindrical portion, and a valve body that has a slit-like valve hole at the bottom and also has an elastic body force made of a soft synthetic resin, and the sleeve member includes the valve body Is accommodated such that the opening end of the tubular portion is located on the opening side of the pipe and the bottom is located on the opposite side of the opening, and the large-diameter portion of the sleeve member is By fitting externally into the opening, the valve body is pressed against the opening to seal the opening, and when the syringe barrel tip is inserted into the valve hole, the valve hole opens and opens. In the connector for liquid-tightly connecting the opening and the syringe by the valve hole being in close contact with the tube tip, The sleeve member includes a tapered portion that connects the large diameter portion and the small diameter portion, and a plurality of ribs that extend along the length direction of the sleeve member on the inner peripheral surface of the large diameter portion. It is characterized by that.

According to the connector of the present invention, the large diameter portion and the small diameter portion of the sleeve member are connected. The valve body pushed into the large diameter portion is easily guided by the taper portion without being locked to the step between the large diameter portion and the small diameter portion. It is possible to return to the state fitted in the small diameter portion. Further, according to the connector of the present invention, since the rib is provided on the inner peripheral surface of the large-diameter portion of the sleeve member, the posture is controlled by the valve body being supported by the rib inside the sleeve member, Inclination can be prevented.

Therefore, according to the connector of the present invention, the valve body is surely pressed against the opening, and the valve hole is securely brought into close contact with the tube tip of the syringe, so that the syringe force is injected. Contact of chemicals with the outside air and liquid leakage can be reliably prevented.

[0013] The sleeve member includes a male screw portion on an outer peripheral surface of the small diameter portion, and when the syringe includes a lock cylinder on an outer peripheral side of the tube tip portion, the lock cylinder is screwed into the male screw portion. Features. The syringe may not be provided with a lock cylinder on the outer peripheral side of the tube tip portion, but when the lock cylinder is provided on the outer periphery side of the tube tip portion, it is screwed into the male screw portion provided in the sleeve member. By doing so, it is securely connected to the opening of the pipe.

[0014] Examples of the pipe include a three-way cock.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is an explanatory sectional view showing a part of the connector according to the present embodiment in a cutaway state, FIG. 2 is an explanatory sectional view showing a configuration of a sleeve member used in the connector according to the present embodiment, and FIG.

III is a sectional view taken along line III.

[0016] The connector 1 of the present embodiment shown in FIG. 1 connects, for example, a three-way cock 11 and a syringe 21 in a liquid-tight manner.

Here, the three-way stopcock 11 includes a first opening 12a and a second opening 12b connected to an infusion line (not shown) in a linear direction and a direction orthogonal to the openings 12a and 12b. Includes a third opening 12c, and the connector 1 is attached to the opening 12c. Each of the openings 12a, 12b, 12c of the three-way stopcock 11 is made to communicate with each other by switching the cock 13 so that any two or all three of them are communicated with each other.

[0018] Specifically, the connector 1 liquid-tightly connects the opening 12c of the three-way cock 11 and the syringe 21. It comprises a sleeve member 2 and a valve body 3 accommodated in the sleeve member 2.

As shown in FIGS. 2 and 3, the sleeve member 2 includes a large-diameter portion 4 that is externally fitted to the opening 12c of the three-way cock 11 and a small-diameter portion 5 that communicates with the large-diameter portion 4. Between the diameter part 4 and the small diameter part 5, there is provided a taper part 6 that gradually decreases in diameter from the large diameter part 4 side toward the small diameter part 5 side. A rib 7 extending along the length direction of the sleeve member 2 is provided on the inner peripheral surface of the large diameter portion 4. In the sleeve member 2 of the present embodiment, four ribs 7 are provided at equal intervals in the circumferential direction.

Furthermore, the sleeve member 2 is provided with a male screw portion 8 on the outer peripheral surface of the small diameter portion 5, and a lock cylinder 23 provided on the outer peripheral side of the cylinder tip portion 22 of the syringe 21 is screwed into the male screw portion 8. It has become. The lock cylinder 23 has a female thread portion 24 on its inner peripheral surface.

On the other hand, the valve body 3 is an elastic body force made of a soft synthetic resin such as silicone rubber, and has a bottomed cylinder including a cylindrical part 9 and a bottom part 10 that closes one end of the cylindrical part 9. The bottom 10 is provided with a slit 10a serving as a valve hole. The valve body 3 is accommodated in the sleeve member 2 so that the opening end 9a of the cylindrical portion 9 is located on the opening 12c side and the bottom 10 is located on the opposite side of the opening 12c. Yes.

[0022] The sleeve member 2 is attached to the three-way cock 11 by fitting the large-diameter portion 4 into the opening 12c in a state where the valve body 3 is accommodated as described above. As a result, the valve body 3 is press-fitted into the small diameter portion 5 of the sleeve member 2 while being fitted into the bottom end 10 while the opening end portion 9a of the cylindrical portion 9 is pressed against the opening portion 12c to be intimately adhered. . At this time, the rib 7 formed on the inner peripheral surface of the large diameter portion 4 is in contact with the outer peripheral surface of the valve body 3.

[0023] The normally closed force of the slit 10a forming the valve hole is opened when the tube tip 22 of the syringe 21 is inserted, and the opened slit 10a is in close contact with the tube tip 22. At this time, the opening end 9a of the cylindrical portion 9 is in close contact with the opening 12c and sealed as described above. Therefore, the connector 1 liquid-tightly connects the opening 12c and the syringe 21 when the slit 10a is in close contact with the tube tip portion 22.

According to the sleeve member 2, the valve body 3 is pushed into the large diameter portion 4 when the tube tip portion 22 of the syringe 21 is inserted into the slit 10 a. However, since the tapered portion 6 is provided between the large diameter portion 4 and the small diameter portion 5, the valve body 3 is guided to the tapered portion 6 when the tube tip portion 22 is removed. Thus, the bottom portion 10 can be easily returned to the state of being fitted into the small diameter portion 5.

[0025] According to the sleeve member 2, when the tube tip 22 is inserted into the slit 10a, the rib 7 is brought into contact with the outer peripheral surface of the tube 9 and the tube 9 is formed of the rib 7 Is supported by Accordingly, the posture of the valve body 3 is controlled by the rib 7, and the valve body 3 can be prevented from being inclined in the large diameter portion 4.

[0026] As a result, according to the connector of the present embodiment, the valve body 3 in which the valve body 3 is not pushed into the large diameter portion 4 and cannot be inclined is surely formed in the opening 12c. While being pressed and sealed, the slit 10a surely comes into close contact with the tube tip portion 22 of the syringe 21, so that contact of the chemical solution injected from the syringe 21 with the outside air and liquid leakage can be reliably prevented.

Next, examples of the present invention and comparative examples are shown.

Example 1

[0028] In this embodiment, first, 25 connectors 1 each comprising a sleeve member 2 and a valve body 3 are prepared by attaching to the opening 12c of the three-way cock 11 shown in FIG. The cylinder tip 22 of the syringe 21 is left inserted in the slit 10a of the cylinder, and the cylinder tip 22 is removed every day, so that the valve body 3 is pushed into the large diameter portion 4 (hereinafter referred to as a collapsed state). The number of connectors 1 that were abbreviated as “) was confirmed. The results up to the fourth day are shown in Table 1.

[0029] Next, nine pieces (samples 1 to 9) of the sleeve member 2, the valve body 3, and the connector 1 that has a force attached to the opening 12c of the three-way cock 11 shown in FIG. Insert the tube tip 22 of the syringe 21 into the slit 10a at an angle and apply a load to the valve body 3, and then remove the tube tip 22 100 times, and check whether there is a depression every time. did. The results are shown in Table 2 as “◯” for connector 1 that has been depressed even if the above operation is performed 100 times, and “X” for connector 1 that has been depressed within 100 cycles. For connector 1, which was in the depressed state within 100 times, the number of the depressed state after “X” is shown in the box.

(Comparative Example 1)

In this comparative example, first, the tube tip 22 of the syringe 21 is inserted into the slit 10a of each valve body 3 in exactly the same manner as in Example 1 except that the connector 31 shown in FIG. The connector 3 with the valve body 3 in the depressed state is pulled out every other day. The number of 1 confirmed. The connector 31 includes a sleeve member 32 instead of the sleeve member 2 of the connector 1. The results up to the fourth day are shown in Table 1.

Next, in place of the connector 1, except that the connector 31 shown in FIG. 4 is used, the cylinder tip 22 of the syringe 21 is obliquely inserted into the slit 10 a of the valve body 3 in exactly the same manner as in Example 1. After inserting and applying a load to the valve body 3, the operation of removing the tube tip 22 was performed 100 times, and the presence or absence of the depressed state of the valve body 3 was confirmed each time. The results are shown in Table 2 exactly as in Example 1.

(Comparative Example 2)

In this comparative example, first, the rib member 7 is provided, but the tapered portion 6 is not provided, and a step is formed between the large diameter portion 4 and the small diameter portion 5 except that the sleeve member 2 has the same shape as the sleeve member 2. Except for using (not shown), exactly the same as in Example 1, leaving the cylinder tip 22 of the syringe 21 inserted in the slit 10a of each valve body 3, leaving the cylinder tip 22 every other day. The number of connectors in which the valve body 3 was depressed was confirmed by removing. The results up to the fourth day are shown in Table 1.

[0031] Next, the rib 7 is provided but the tapered portion 6 is not provided, and a step is formed between the large diameter portion 4 and the small diameter portion 5! Except for the use of a sleeve member (not shown), after applying a load to the valve body 3 by inserting the tube tip 22 of the syringe 21 diagonally into the slit 10a of the valve body 3 in exactly the same manner as in Example 1. The operation of removing the tube tip 22 was performed 100 times, and the presence or absence of the depressed state of the valve body 3 was confirmed each time. The results are shown in Table 2 exactly as in Example 1.

(Comparative Example 3)

In this comparative example, first, except that a sleeve member (not shown) having the same shape as the sleeve member 2 is used except that the taper portion 6 is provided but the rib 7 is not provided, it is completely the same as the embodiment 1, The tube tip 22 of the syringe 21 was left inserted in the slit 10a of each valve body 3, and the tube tip 22 was removed every other day, and the number of connectors in which the valve body 3 was depressed was confirmed. Table 1 shows the results up to the fourth day.

[0032] Next, except that a sleeve member (not shown) having the same shape as the sleeve member 2 is used except that the taper portion 6 is provided but the rib 7 is not provided, the valve is the same as in the first embodiment. After inserting the cylinder tip 22 of the syringe 21 into the slit 10a of the body 3 diagonally and applying a load to the valve body 3, the operation of removing the cylinder tip 22 is performed 100 times. The presence or absence of a depressed state was confirmed. The results are shown in Table 2 exactly as in Example 1.

[0033] In the connector 1, the tube tip 22 of the syringe 21 is usually inserted into the slit 10a of the valve body 3 to inject a chemical solution or the like, and when the injection is completed, the tube tip 22 is removed immediately. In addition, normally, it is impossible to insert the tube tip portion 22 into the slit 10a of the valve body 3 at an angle. Therefore, as in Example 1 and Comparative Examples 1 to 3, the tube tip 22 of the syringe 21 is inserted into the slit 10a of the valve body 3 and left for one day or more, or the tube tip 22 is inserted into the slit 10a of the valve body 3 It is extremely harsh to repeat the operation of inserting and then removing at an angle.

[0034] [Table 1]

[0035] From Table 1, in the connector 1 of Example 1, there was no taper part 6 and rib 7 in which the valve body 3 was in a depressed state even after the fourth day under the above severe conditions. Comparative example 1 using a sleeve member 3 2 not provided, rib 7 provided, but with a tapered portion 6 Comparative example 2 using a sleeve member, tapered portion 6 provided with a rib 7 is clearly superior in the effect of preventing the occurrence of the depressed state of the valve body 3 as compared with Comparative Example 3 using the sleeve member.

[0036] [Table 2] Example 1 Comparative example 1 Comparative example 2 Comparative example 3 Sample 1 〇 X (2 1 times) X (80 times) 〇

Sample 2 ○ X (1 time) ○ X (7 7 times) Sample 3 ○ X (6 times) ○ ○

Sample 4 ○ X (2 8 times) ○ X (7 5 times) Sample 5 ○ X (2 5 times) ○ ○

Sample 6 〇 X (2 4 times) 〇〇

Sample 7 〇 X (3 times) 〇 X (8 5 times) Sample 8 〇 X (1 time) 〇 X (88 8 times) Sample 9 〇 X (5 times) 〇 ○

[0037] From Table 2, in the connector 1 of Example 1, when the insertion and removal of the tube tip portion 22 with respect to the slit 10a was repeated 100 times under the above severe conditions, the valve body 3 was in a depressed state. Comparative example 1 using a sleeve member 32 having no taper part 6 and ribs 7 and no ribs 7 Comparative example 2 using a sleeve member having ribs 7 but having a taper part 6 It is clear that the taper portion 6 is provided with the rib 7 but is excellent in the effect of preventing the occurrence of the depressed state of the valve body 3 as compared with the comparative example 3 using the sleeve member. It is.

[0038] Therefore, according to the connector 1 of the first embodiment, it is possible to expect an effect of reliably preventing contact of the chemical liquid injected from the syringe 21 with the outside air and liquid leakage.

[0039] In the present embodiment, the connector 1 attached to the opening 12c of the three-way stopcock 11 is described. However, the connector 1 is attached to an opening of a pipe other than the three-way stopcock 11. There may be.

In the present embodiment, the sleeve member 2 provided with the external thread portion 8 on the outer peripheral surface of the small diameter portion 5 will be described. However, the sleeve member 2 may or may not include the external thread portion 8. Oh ,.

Brief Description of Drawings

FIG. 1 is an explanatory cross-sectional view showing a part of the connector according to the present invention in a cutaway manner.

FIG. 2 is an explanatory cross-sectional view showing the configuration of a sleeve member used in the connector of the present invention.

FIG. 3 is a cross-sectional view taken along the line の-FIG. 圆 4] An explanatory cross-sectional view showing a part of a conventional connector, broken away.

Explanation of symbols

1 ... Connector, 2 ... Sleeve member, 3 ... Valve, 4 ... Large diameter part, 5 ... Small diameter part, 6-super part, 7 ... Rib, 8 ... Male thread part, 9 ... Cylindrical shape 10, 10 ... bottom, 10a ... valve hole, ... piping, 12c ... opening, 21 ... syringe, 22 ... tube tip.

Claims

The scope of the claims

[1] A cylindrical sleeve member having a large-diameter portion fitted over the opening of the pipe and a small-diameter portion communicating with the large-diameter portion, and the cylindrical portion and one end of the cylindrical portion are closed. And a valve body made of an elastic body made of a soft synthetic resin having a slit-like valve hole at the bottom, the valve body being attached to the sleeve member, and an opening end of the tubular portion being The valve is accommodated by being positioned on the opening side of the pipe so that the bottom portion is located on the opposite side of the opening, and by fitting the large-diameter portion of the sleeve member to the opening. The body is pressed against the opening to seal the opening, and when the tube tip of the syringe is inserted into the valve hole, the valve hole is opened, and the opened valve hole is in close contact with the tube tip In the connector for liquid-tightly connecting the opening and the syringe,

The sleeve member includes a tapered portion that connects the large diameter portion and the small diameter portion, and includes a plurality of ribs extending along the length direction of the sleeve member on the inner peripheral surface of the large diameter portion. A connector characterized by that.

[2] The sleeve member includes a male screw portion on an outer peripheral surface of the small-diameter portion, and when the syringe includes a lock cylinder on the outer peripheral side of the tube tip portion, the lock cylinder is screwed into the male screw portion. The connector according to claim 1, wherein:

[3] The connector according to claim 1 or 2, wherein the pipe is a three-way stopcock.