JPWO2006103792A1 - connector - Google Patents

Abstract

Provided is a connector that can reliably prevent contact of liquid medicine injected from a syringe with outside air and liquid leakage. A sleeve member 2 having a large-diameter portion 4 that is externally fitted to the opening 12 c of the pipe 11 and a small-diameter portion 5 that communicates with the large-diameter portion 4, a cylindrical portion 9, and a bottom portion 10. And a valve body 3 having a valve hole 10a. The valve body 3 is accommodated in the sleeve member 2 and the large-diameter portion 4 is externally fitted to the opening 12c, whereby the valve body 3 is pressed against the opening 12c to seal the opening 12c. When the tube tip 22 of the syringe 21 is inserted into the valve hole 10a, the valve hole 10a is opened, and the opened valve hole 10a is in close contact with the tube tip 22 so that the opening 12c and the syringe 21 are connected in a liquid-tight manner. . The sleeve member 2 includes a tapered portion 6 that connects the large diameter portion 4 and the small diameter portion 5, and includes a plurality of ribs 7 on the inner peripheral surface of the large diameter portion 4. The sleeve member 2 includes a male screw portion 8 on the outer peripheral surface of the small diameter portion 5. The pipe 11 is a three-way cock.

Description

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

  Conventionally, using one of the three-way cock openings connected to an infusion line or the like as a connection port, a medical solution or the like is mixedly injected into the infusion line from a syringe connected to the connection port. At this time, it is necessary that the opening of the three-way cock and the syringe are connected in a liquid-tight manner, and the chemical liquid injected from the syringe into the infusion line may come into contact with the outside air or cause a liquid leak. Must not be.

  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 stopcock and the syringe. As shown in FIG. 4, the connector 31 described in the specification includes a cylindrical sleeve member 32 fitted on the opening 12 c of the three-way cock 11, and a valve that is built in the sleeve member 32 and seals the opening 12 c. And a body 3.

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

  The connector 31 is attached to the three-way cock 11 by fitting the large-diameter portion 4 of the sleeve member 32 into the opening 12c. In this case, since the valve body 3 is made of a soft synthetic resin, the opening end portion 9a of the cylindrical portion 9 is pressed against the opening portion 12c and is elastically adhered, and the opening portion 12c is sealed with the valve body 3 Is done.

  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, but when the tube tip of the syringe (not shown) is inserted, the slit 10a is opened and is in close contact with the tube tip.

  As a result, the connector 12 connects the opening 12c and the syringe in a liquid-tight manner.

  However, since the valve body 3 is made of the soft synthetic resin, the resin deteriorates by repeatedly inserting and removing the tube tip portion of the syringe, or the resin creep-deforms by keeping the tube tip portion inserted for a long time. Or the elasticity is reduced. When the elasticity of the resin forming the valve body 3 is lowered, the valve body 3 is fitted into the small diameter portion 5 while the valve body 3 is pushed into the large diameter portion 4 of the sleeve member 32 when the cylinder tip portion of the syringe is inserted. As a result, the valve body 3 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 chemical solution injected from the syringe comes into contact with the outside air. There is a concern that liquid leakage may occur.

  An object of this invention is to provide the connector which can prevent reliably that the chemical | medical solution inject | poured from a syringe contacts external air or a liquid leak arises in view of the said problem.

  In order to achieve this 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, the cylindrical portion, and the cylinder And a valve body made of an elastic body made of a soft synthetic resin having a slit-like valve hole in the bottom portion, the valve body being attached to the sleeve member. And the large diameter portion of the sleeve member is fitted into the opening portion so that the opening end portion of the tube-shaped portion is located on the opening portion side of the pipe and the bottom portion is located on the opposite side of the opening portion. Thus, the valve 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 the connector for liquid-tightly connecting the opening and the syringe by closely contacting the tube tip, the sleeve member is A taper portion that connects the large diameter portion and the small diameter portion is provided, and a plurality of ribs that extend along the length direction of the sleeve member are provided on the inner peripheral surface of the large diameter portion. .

  According to the connector of the present invention, since the taper portion that connects the large diameter portion and the small diameter portion of the sleeve member is provided, the valve body pushed into the large diameter portion includes the large diameter portion and the small diameter portion. Without being locked by the step between the two, it is possible to return to the state of being easily fitted in the small diameter portion by being guided by the tapered portion. 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 valve body is supported by the rib inside the sleeve member, the posture is controlled, and the inclination Can be prevented.

  Therefore, according to the connector of the present invention, the valve body is reliably pressed against the opening, and the valve hole is securely in close contact with the tube tip of the syringe, and the outside air of the chemical liquid injected from the syringe It is possible to reliably prevent contact and liquid leakage.

  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. . The syringe may not be provided with a lock cylinder on the outer peripheral side of the tube tip portion, but when provided with a lock cylinder 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.

  An example of the pipe is a three-way cock.

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

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

  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 third direction in a direction orthogonal to the openings 12a and 12b. The opening 12c is provided, and the connector 1 is attached to the opening 12c. Each of the openings 12a, 12b, 12c of the three-way cock 11 is configured such that any two or all three of them are communicated with each other by switching the cock 13.

  The connector 1 specifically connects the opening 12c of the three-way cock 11 and the syringe 21 in a fluid-tight manner, and includes 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 12 c of the three-way cock 11, and a small-diameter portion 5 that communicates with the large-diameter portion 4. And a small diameter portion 5 are provided with a tapered portion 6 that gradually decreases in diameter from the large diameter portion 4 side toward the small diameter portion 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.

  Further, the sleeve member 2 includes 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 tube tip portion 22 of the syringe 21 is screwed into the male screw portion 8. . The lock cylinder 23 has a female thread portion 24 on its inner peripheral surface.

  On the other hand, the valve body 3 is made of an elastic body made of a soft synthetic resin such as silicone rubber, and has a bottomed tubular body including a tubular portion 9 and a bottom portion 10 that closes one end of the tubular portion 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 such that the opening end 9a of the tubular portion 9 is located on the opening 12c side and the bottom 10 is located on the opposite side of the opening 12c.

  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 pressed into the small diameter portion 5 of the sleeve member 2 while being internally fitted while the opening end portion 9a of the cylindrical portion 9 is pressed against the opening portion 12c and is elastically adhered. . At this time, a 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.

  The slit 10 a that forms the valve hole is normally closed, but opens when the tube tip 22 of the syringe 21 is inserted, and the opened slit 10 a comes into close contact with the tube tip 22. At this time, the open end 9a of the cylindrical portion 9 is sealed in an elastic contact with the opening 12c as described above. Accordingly, the connector 1 liquid-tightly connects the opening 12c and the syringe 21 by the slit 10a being 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 by the tapered portion 6 and the bottom portion 10 has a small diameter when the tube tip portion 22 is removed. It is possible to easily return to the state fitted in the portion 5.

  Further, according to the sleeve member 2, the rib 7 is in contact with the outer peripheral surface of the tubular portion 9 when the tubular tip portion 22 is inserted into the slit 10 a, and the tubular portion 9 is supported by the rib 7. ing. Therefore, 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.

  As a result, according to the connector of the present embodiment, the valve body 3 is not pushed into the large-diameter portion 4 or tilted, and the valve body 3 is reliably pressed against the opening 12c. Since the slit 10a is in close contact with the tube tip portion 22 of the syringe 21, contact with the outside air of the chemical solution injected from the syringe 21 and liquid leakage can be reliably prevented.

  Next, examples of the present invention and comparative examples will be described.

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

Next, nine connectors (samples 1 to 9) are prepared by attaching the connector 1 including the sleeve member 2 and the valve body 3 to the opening 12c of the three-way cock 11 shown in FIG. 1, and the slit 10a of the valve body 3 is prepared. After inserting the tube tip 22 of the syringe 21 obliquely 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 a depressed state was confirmed each time. The results are shown in Table 2 as “◯” for the connector 1 that did not enter the depressed state even after 100 operations, and “X” for the connector 1 that entered the depressed state within 100 times. In addition, about the connector 1 which became the depression state within 100 times, it showed in parenthesis how many times it became the depression state after "x".
[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 tube tip was removed every other day, and the number of connectors 31 in which the valve body 3 was depressed was confirmed. The connector 31 includes a sleeve member 32 in place 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 tube tip 22 of the syringe 21 is inserted obliquely into the slit 10 a of the valve body 3 in the same manner as in the first embodiment. After applying a load to the 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 every time. The results are shown in Table 2 exactly as in Example 1.
[Comparative Example 2]
In this comparative example, first, a sleeve member having exactly the same shape as the sleeve member 2 except that 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 using the same, the same as in Example 1, leaving the tube tip 22 of the syringe 21 inserted in the slit 10a of each valve body 3, leaving the tube tip 22 removed every other day. Thus, the number of connectors in which the valve body 3 was depressed was confirmed. The results up to the fourth day are shown in Table 1.

Next, a sleeve member (not shown) having the same shape as the sleeve member 2 except that 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 that is used, the cylinder tip portion 22 of the syringe 21 is obliquely inserted into the slit 10a of the valve body 3 and a load is applied to the valve body 3, and then the tube tip portion 22 is removed. The operation was performed 100 times, and the presence or absence of the depressed state of the valve body 3 was confirmed every 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 exactly the same shape as the sleeve member 2 is used except that the tapered portion 6 is provided but the rib 7 is not provided, the same as in the first embodiment, The cylinder tip part 22 of the syringe 21 was left inserted in the slit 10a of each valve element 3, and the cylinder tip part 22 was removed every other day, and the number of connectors in which the valve element 3 was depressed was confirmed. The results up to the fourth day are shown in Table 1.

  Next, except for using a sleeve member (not shown) having the same shape as the sleeve member 2 except that the taper portion 6 is provided but the rib 7 is not provided, the valve body 3 of the valve body 3 is completely the same as that of the first embodiment. After inserting the cylinder tip portion 22 of the syringe 21 into the slit 10 a obliquely and applying a load to the valve body 3, the operation of removing the tube tip portion 22 is performed 100 times, and whether or not the valve body 3 is depressed every time is checked. confirmed. The results are shown in Table 2 exactly as in Example 1.

  In the connector 1, the tube tip 22 of the syringe 21 is usually inserted into the slit 10 a of the valve body 3 to inject a chemical solution or the like, and the tube tip 22 is removed immediately after the injection is completed. 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 placed in the slit 10a of the valve body 3. It is a very harsh condition to repeat the operation of inserting and removing at an angle.

  From Table 1, in the connector 1 of Example 1, there is no one in which the valve body 3 is in a depressed state even in the severe condition under the fourth day, and neither the tapered portion 6 nor the rib 7 is provided. Comparative Example 1 using a sleeve member 32, Comparative Example 2 using a sleeve member provided with the rib 7 but not the taper portion 6, Sleeve member not provided with the rib 7 but provided with the taper portion 6 It is apparent that the effect of preventing the occurrence of the depressed state of the valve body 3 is superior to the comparative example 3 used.

  From Table 2, in the connector 1 of Example 1, even 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, there was no single valve body 3 in the depressed state. Comparative Example 1 using the sleeve member 32 without the taper portion 6 and the rib 7, Comparative Example 2 using the sleeve member having the rib 7 but not the taper portion 6, and the taper portion 6 However, it is apparent that the effect of preventing the occurrence of the depressed state of the valve body 3 is superior to Comparative Example 3 using the sleeve member that does not include the rib 7.

  Therefore, according to the connector 1 of Example 1, the effect of reliably preventing the contact of the chemical liquid injected from the syringe 21 with the outside air and the liquid leakage can be expected.

  In addition, in this embodiment, although the connector 1 attached to the opening part 12c of the three-way stopcock 11 is demonstrated, even if the connector 1 is attached to the opening part of piping other than the three-way stopcock 11, Good.

  In the present embodiment, the sleeve member 2 including the external thread portion 8 on the outer peripheral surface of the small diameter portion 5 is described. However, the sleeve member 2 may not include the external thread portion 8.

The explanatory sectional view which fractures and shows a part of connector of the present invention. Explanatory sectional drawing which shows the structure of the sleeve member used for the connector of this invention. III-III sectional view taken on the line of FIG. Explanatory sectional drawing which fractures | ruptures and shows a part of conventional connector.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Connector, 2 ... Sleeve member, 3 ... Valve body, 4 ... Large diameter part, 5 ... Small diameter part, 6 ... Tapered part, 7 ... Rib, 8 ... Male screw part, 9 ... Cylindrical part, 10 ... Bottom part, 10a ... valve hole, 11 ... piping, 12c ... opening, 21 ... syringe, 22 ... tube tip.

Claims (3)

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; a tubular portion; and a bottom portion that closes one end of the tubular portion; Comprising a valve body made of an elastic body made of a soft synthetic resin having a slit-like valve hole at the bottom,
The sleeve member is accommodated in the sleeve member such that the opening end of the cylindrical portion is located on the opening side of the pipe and the bottom is located on the opposite side of the opening, The valve body is pressed against the opening to seal the opening by fitting the large-diameter portion of the valve into the opening, and the valve tip is inserted into the valve hole. In the connector that liquid-tightly connects the opening and the syringe by opening the hole, and the valve hole that is opened is 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 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.   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. The connector according to claim 1.   The connector according to claim 1, wherein the pipe is a three-way cock.

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