JP2015198721A - Valve member and needleless connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve member excellent in re-sealability, and a needleless connector.SOLUTION: A silicone rubber valve member to be used for a needleless connector includes a slit penetrating into the thickness direction, and a stress dispersion part on an end part in the lengthwise direction of the slit. The stress dispersion part comprises a pair of recessed parts recessed in the thickness direction from each of both front surfaces of the valve member. The needleless connector includes: a needleless connector tube having at least two connection ports for connecting a tube, a flow channel for communicating the connection ports, and a valve member storage part arranged near the connection port; and the valve member stored in the valve member storage part.

Description

  The present invention relates to a valve member and a needleless connector, and more particularly to a valve member and a needleless connector excellent in resealability.

  Various connectors for connecting at least two tube bodies are known, and examples thereof include medical connectors. The medical connector is, for example, a needle used for intravenous administration or blood transfusion for administering a drug solution, a body fluid, a nutrient solution or the like (referred to as fluid in the present invention) necessary for a patient via a catheter or the like placed in the patient. A connector, a needleless connector used when intravenously administering a second fluid of a different type or concentration from the first fluid connected to one tube body to a patient in the same manner, specifically a mixed injection tube Etc.

  Conventionally, a syringe equipped with an injection needle has been used to inject fluid into a medical connector such as a mixed injection tube. However, in recent years, in order to avoid infection due to needle sticks of medical staff, in recent years, instead of such syringes, tubes such as syringes that do not have a syringe needle, such as syringes with luer locks, infusion solutions with luer locks, etc. A tube or the like is used as a tube connected to a medical connector.

  As a medical connector that can connect or use a tube body that does not have such an injection needle, a slit that is opened by a tube body that is normally sealed but not provided with an injection needle is formed only when necessary. Some have a valve member (Patent Documents 1 to 4).

Japanese Patent No. 4739019 JP 2009-172099 A JP 2004-016437 A JP 2002-306610 A

  Some needleless connectors are disposable each time a fluid is administered or infused. On the other hand, it may be used to administer or inject several times in succession, for example when the same fluid is administered several times in a short time. When the fluid is administered or injected a plurality of times, the end of the slit may be torn due to stress due to insertion / removal of the tube. In particular, when the slit is linear and formed in one direction, the end tends to be easily torn. If the end of the slit is torn, the sealing performance (resealability) of the slit after removing the tubular body inserted into the slit is lowered, and the function as a valve member is not achieved.

  In particular, when the valve member is made of silicone rubber, it is excellent in chemical resistance and the like compared to natural rubber, isoprene rubber, etc., but the end of the slit tends to tear easily, and improvement is desired. Yes.

  An object of the present invention is to provide a valve member and a needleless connector that are excellent in resealability.

The object of the present invention has been achieved by the following means.
(1) A valve member made of silicone rubber used in a needleless connector,
Having a slit penetrating in the thickness direction, and a stress dispersion portion at the end in the length direction of the slit,
The stress dispersion part is composed of a pair of recesses recessed in the thickness direction from both surfaces of the valve member.
(2) The valve member according to (1), wherein the concave portion is a bottomed hole or a groove.
(3) The valve member according to (2), wherein the groove is arcuate or annular.
(4) a needleless connector pipe having at least two connection ports connectable to the tube body, a flow path communicating these connection ports, and a valve member housing portion disposed in the vicinity of the first connection port; A needleless connector comprising: the valve member according to any one of (1) to (3) housed in the valve member housing portion.

  In the present invention, the stress dispersion portion refers to a portion that is provided at an end portion of the slit and disperses stress concentrated on the end portion by insertion / removal of the needleless tube.

  Even if the valve member of the present invention and the needleless connector of the present invention are inserted into and removed from the slit a tube body not equipped with an injection needle a plurality of times, or made of silicone rubber, the end of the slit is difficult to tear, Excellent resealability. Therefore, it is possible to maintain a desired opening / closing function as a valve member for a long period of time, in which the tip portion can be inserted only when necessary in a sealed state.

FIG. 1 is a cross-sectional view showing an example of a needleless connector of the present invention. FIG. 2 is a plan view (a) and a sectional view (b) showing an example of the valve member of the present invention. FIG. 3: is the top view (a) and sectional drawing (b) which show another example of the valve member of this invention. FIG. 4 is a plan view (a) and a sectional view (b) showing still another example of the valve member of the present invention. FIG. 5 is a plan view (a) and a sectional view (b) showing still another example of the valve member of the present invention.

The valve member of the present invention is a needleless connector that connects at least two tubes, for example, a medical connector that connects a tube connected to a catheter placed in a patient and an infusion tube, particularly the above-mentioned A medical connector for connecting a tube and a tube body such as a syringe not provided with an injection needle, for example, a syringe with a luer lock, an infusion tube with a luer lock, etc. (referred to as a needleless tube body in the present invention), particularly mixed injection It is suitably used for tubes and the like. Therefore, the valve member of the present invention is also referred to as a needle-less connector valve member.
The present invention will be described below by taking a medical connector as an example.

  The needleless connector of the present invention includes a needleless connector pipe and a valve member of the present invention housed in a radially compressed state in a valve member housing portion of the needleless connector pipe. The valve member of the present invention is in a hermetically sealed state when its outer peripheral surface is in close contact with the inner peripheral surface of the valve member housing portion and the slit is closed. On the other hand, the valve member of the present invention is opened when the tip of the needleless tube is inserted into the slit, and the lumen of the tube communicates with the flow path of the needleless connector tube. Fluid is supplied from the lumen into the needleless connector tube. When the tube body is removed from the slit after the supply of fluid is completed, the slit is closed and the sealed state is restored. Thus, the needleless connector of the present invention easily shifts from a sealed state having a high sealing property to an open state, and restores and transitions to the original sealed state.

  The needleless connector tube is not particularly limited as long as it is used for various conventionally known needleless connectors. For example, a needleless connector tube having three connection ports in a substantially T shape or Y shape in plan view, Examples include a needleless connector tube having four connection ports having a substantially cross shape in plan view, a needleless connector tube having two connection ports having an I shape in plan view, and the like.

  The valve member of the present invention is housed and disposed in a compressed state, for example, in a valve member holding portion provided in the needleless connector tube. The valve member of the present invention is formed of silicone rubber, and has a slit penetrating in the thickness direction and a stress dispersion portion at an end of the slit. A tubular body is inserted into this slit and removed (inserted / removed). The stress dispersion part is composed of a pair of recesses provided in the thickness direction from both surfaces of the valve member, and the thickness of the stress dispersion part is smaller than the penetration length of the slit. This stress dispersion portion is preferably formed inside the outer edge of the valve member, and the dimension along the length direction of the slit is smaller than the length from the end of the slit to the outer edge of the valve member.

  The needleless tube connected to the needleless connector of the present invention is not particularly limited as long as it has a lumen, that is, a space for containing a fluid therein, and does not have a needle. Tube. For example, the needle-free tube has a shape in which the tip portion can be connected to the third connection port, and usually has a small-diameter annular structure having an outer diameter slightly smaller than the inner diameter of the third connection port. Yes. An outer peripheral surface of the tip portion may have a luer groove that is screwed into a luer lock formed as desired in the third connection port.

  Hereinafter, the needleless connector of the present invention and the valve member of the present invention will be specifically described.

  The needleless connector 1 which is an example of the needleless connector of the present invention is suitably used as a mixed injection tube having three connection ports as shown in FIG. This needleless connector 1 is connected to a bag or the like containing a fluid to be administered to a patient, connected to a first connection port 11 to which a tube (not shown) is connected, a catheter placed in the patient, etc. A second connection port 12 to which a pipe body that is not connected is connected, a third connection port 13 to which a needleless pipe body can be connected, a flow path 14 that connects these connection ports 11 to 13, and a third connection port 13 The needleless connector pipe 4 having a substantially T shape in a plan view and having a valve member holding portion 15 provided on the opening side of the connection port 13 and a valve member 5A accommodated in the valve member accommodating portion 15 are provided.

  The needleless connector tube 4 includes a first connection port 11 and a second connection port 12 provided at both ends of the tube, and a third connection port 13 protruding in a direction intersecting the axis of the tube. have. In the needleless connector tube 4, for example, a first connection port 11 is connected to a tube body connected to a bag or the like containing a fluid, and a second connection port 12 is connected to a tube body connected to a catheter or the like. The third connection port 13 is connected to a needleless tube. And the valve member accommodating part 15 which accommodates the valve member 5A in the 3rd connection port 13 is defined. The valve member storage portion 15 has an inner diameter smaller than the outer diameter of the valve member 5A so that the valve member 5A is disposed and stored in a state compressed in the axial direction from the entire circumferential direction. Each of the connection ports 11 to 13 of the needleless connector tube 4 is formed with a structure that can be connected to a needleless tube described later or a structure that can temporarily hold the connection, for example, a luer lock screw or the like. Yes.

  The needleless connector tube 4 and the needleless tube body are usually formed of a rigid material, for example, various resins, various glasses, various ceramics, and various metals. Examples of the resin include polyolefin resins such as polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride, polyvinylidene chloride, polystyrene, polyamide, polyimide, polyamideimide, and polycarbonate. , Poly- (4-methylpentene-1), ionomer, acrylic resin, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS resin) resin, acrylonitrile-styrene copolymer (AS resin) resin, Resin of butadiene-styrene copolymer, polyester resin such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexane terephthalate (PCT), polyether, polyether Ketone (PEK), polyetheretherketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, modified polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), Examples thereof include polytetrafluoroethylene, polyvinylidene fluoride, fluorine-based resins, blend resins containing one or more of these resins, and polymer alloys.

The valve member 5A, which is an example of the valve member of the present invention, housed in the needleless connector 1 is compressed in the radial direction in the valve member housing portion 15 of the needleless connector 4, as shown in FIG. It is stored. As shown in FIG. 2, the valve member 5 </ b> A is made of a flat or cylindrical silicone rubber base, and has a slit 8 that penetrates in the thickness direction and stress distribution portions 9 </ b> A at both ends in the length direction of the slit 8. have.
2A is a plan view of the valve member 5A, and FIG. 2B is a cross-sectional view taken along line XX in FIG. 2A.

As shown in FIGS. 1 and 2, the valve member 5 </ b> A is formed in a flat plate shape that is a flat disk made of silicone rubber. Therefore, since the valve member 5A is chemically stable and physiologically inactive, safety to the human body is high.
The valve member 5A has a JIS A hardness of 30 to 70. When the valve member 5A has the JIS A hardness in the above range, when the valve member 5A is stored in the valve member storage portion 15 in a compressed state, the valve member 5A quickly reversibly shifts between an open state and a sealed state, and has high sealing performance. Are also expressed. In particular, when the compression ratio in the radial direction (diameter after compression / diameter in a non-compressed state) is 85 to 99.5% in the valve body storage portion 15, such ease of transition and sealing are excellent.
The diameter and thickness (length in the axial direction) of the valve member 5A are set so as to satisfy the above dimensions. For example, the diameter is usually larger than the inner diameter of the valve member storage portion 15 so that the valve member storage portion 15 can be compressed and stored. The thickness is set to be shorter than the length of the tip portion in the axial direction so that the tip portion of the needleless tubular body 30 penetrates the valve member 5A. Specifically, for example, the diameter is set within a range of 3 to 20 mm, and the thickness is set within a range of 0.5 to 7.0 mm.

  As shown in FIG. 2, the valve member 5 </ b> A has a slit 8 that extends in the diameter direction and the axial direction so as to pass through the center thereof. The slit 8 is formed in a single character, but the shape of the slit is not particularly limited, and may be, for example, a trident slit or a cross slit. The slit length (extended length in the diameter direction) of the slit 8 is, for example, 50 to 150% with respect to the outer diameter of the distal end portion in consideration of insertion / removal of the distal end portion of the needleless tube. Preferably, it is 70 to 100%, particularly preferably 3.0 to 4.5 mm. The slit length is the diameter of a virtual circumscribed circle circumscribing the end of the slit 8.

As shown in FIG. 2, the valve member 5 </ b> A has a stress dispersion portion 9 </ b> A composed of a pair of recesses 9 a that are recessed in the thickness direction from both surfaces of the valve member 5 </ b> A at both ends of the slit 8. doing.
The stress dispersion portion 9A is preferably formed inside the outer edge of the valve member 5A and is not connected to the outer peripheral surface of the valve member 5A. That is, it is preferable that the dimension of the stress dispersion portion 9A along the length direction of the slit 8 is smaller than the length from the end portion of the slit 8 to the outer edge of the valve member 5A.

  Such a stress distribution portion 9A is preferably a bottomed hole or a groove, and in this example, it is a bottomed hole having a circular cross section. The shape and depth of the bottomed hole are not particularly limited and are adjusted as appropriate. Examples of the cross-sectional shape of the bottomed hole include a circle, an ellipse, and a polygon. The depth of each bottomed hole is preferably 5 to 40%, preferably 10 to 30% of the depth of the valve member 5A in terms of the strength of the valve member 5A and the stress dispersibility due to insertion and removal of the needleless tube. Is more preferable.

  In the stress dispersion portion 9A, the pair of recesses 9a only have to be provided on both surfaces of the valve member 5A, and may have different shapes and dimensions.

As shown in FIG. 3, the valve member 5B, which is another example of the valve member of the present invention, is basically the same as the valve member 5A except that the stress dispersion portion is different. Preferably used.
That is, the valve member 5B has a stress distribution portion 9B including a pair of grooves 9b that are recessed in the respective surfaces of the valve member 5B instead of the bottomed hole 9a. The groove 9b is formed in an annular shape having a rectangular cross section in contact with both end portions of the slit 8. Although not shown, the groove 9b does not need to be annular as long as it is provided at the end of the slit 8, and may be an arcuate groove that contacts each end.
3A is a plan view of the valve member 5A, and FIG. 3B is a cross-sectional view taken along line YY of FIG. 3A.

As shown in FIG. 4, the valve member 5C, which is another example of the valve member of the present invention, is basically the same as the valve member 5A except that the stress dispersion portion is different, and the needleless connector of the present invention. Is preferably used.
That is, the valve member 5C has a stress distribution portion 9C including a bottomed hole 9c whose depth gradually increases toward the outside in the diameter direction, instead of the bottomed hole 9a. That is, the bottomed hole 9c has an inclined bottom surface that is inclined in the depth direction toward the outside in the diameter direction. The end of the slit 8 is located inside the bottomed hole 9c (inclined bottom surface), in the present example, at a substantially intermediate point. The bottomed hole 9 c only needs to have such a relationship with the slit 8. The inner end may coincide with the end of the slit 8. On the other hand, the outer end portion only needs to be outside the end portion of the slit 8.
4A is a plan view of the valve member 5C, and FIG. 4B is a cross-sectional view taken along line XX in FIG. 4A.

As shown in FIG. 5, the valve member 5D, which is another example of the valve member of the present invention, is basically the same as the valve member 5B except that the stress dispersion portion is different. It is suitably used for a needleless connector.
That is, the valve member 5D has a stress dispersion portion 9D including a pair of grooves 9d whose depth gradually increases toward the outside in the diameter direction, instead of the grooves 9b. That is, the groove 9d has an inclined bottom surface that is inclined in the depth direction toward the outside in the diameter direction. The relationship between the end of the slit 8 and the groove 9d is the same as the relationship between the bottomed hole 9c of the valve member 9C and the slit 8.
5A is a plan view of the valve member 5D, and FIG. 5B is a cross-sectional view taken along line YY of FIG. 5A.

As the silicone rubber forming the valve member, various silicone rubbers having a JIS A hardness of 30 to 70 can be used. For example, dimethyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl silicone rubber, methyl phenyl vinyl silicone rubber, etc. Is mentioned.
Further, the silicone raw rubber used as the silicone rubber may be liquid or solid, and the crosslinking of the silicone raw rubber is not particularly limited, and it may be an addition reaction curable type or a peroxide curable type. Good.

Examples of the silicone rubber composition containing a liquid silicone raw rubber include vinyl-containing organopolysiloxanes, hydrogen polysiloxanes, platinum-based catalysts, and the like.
Examples of the silicone rubber composition containing a peroxide curable silicone raw rubber include methyl vinyl silicone raw rubber and organic peroxide vulcanizing agents.

  Silicone rubber and silicone rubber composition may contain various commonly used additives. Such additives include, for example, dispersants, foaming agents, vulcanizing agents, antioxidants, antioxidants, fillers, pigments, colorants, processing aids, plasticizers, flame retardants, release agents. Examples include molds.

  The silicone rubber composition may be appropriately prepared or a commercially available product may be prepared. Examples of commercially available products include “KE-951-U” (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), “KE-1950-50” (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), and “KE-551-. U "(trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) and the like.

The valve member can be manufactured using a silicone rubber composition by molding by various molding methods, forming a slit, and optionally forming a stress dispersion portion. For example, there is a method of forming a slit in a molded body formed by using a mold capable of forming a base body having a stress dispersion portion. Such a molding method is not particularly limited, but compression molding is preferable in view of shape stability, production efficiency, fractionation, and the like.
The molding conditions at this time cannot be determined in general according to the crosslinking conditions of the silicone rubber composition to be used. For example, the heating temperature is 80 to 170 ° C., the heating time is 60 to 600 seconds, and the molding pressure is Is 5-30 MPa.

  The needleless connector of the present invention is manufactured by producing a needleless connector tube and the valve member of the present invention, and housing the valve member of the present invention in the needleless connector tube. The needleless connector tube can be manufactured by a known molding method using the above-described materials.

  The valve member of the present invention thus obtained is housed in the valve member housing portion of the needleless connector tube, and the needleless connector of the present invention is manufactured.

  The valve member of the present invention disperses the stress concentrated at the end of the slit by the stress distribution portion provided at the end of the slit by inserting and removing the needleless tube. Therefore, even if the needleless tube is inserted into and removed from the slit a plurality of times, the end of the slit is difficult to tear. Moreover, even if it is made of silicone rubber, the end of the slit is not easily torn. Therefore, the valve member of the present invention has excellent resealability and can maintain the desired opening / closing function as the valve member for a long period of time.

The valve member and the needleless connector of the present invention are not limited to the above-described examples, and various modifications can be made within a range in which the object of the present invention can be achieved.
For example, although the needleless connector 1 includes the needleless connector tube 4 having three connection ports 11 to 13, the needleless connector tube may have two or four or more connection ports.

  The stress dispersion portion of the valve member may be formed of a pair of recesses, and the recesses 9a and the grooves 9b may be combined, and the dimensions and shape can be changed as appropriate without departing from the object of the present invention. . For example, each of the recesses shown in FIGS. 2 and 3 has a rectangular cross-sectional shape in the depth direction of the valve member, but may be semicircular, semielliptical, arcuate, or the like. Such a shape is excellent in hygiene.

  Alternatively, an inclined surface with a gradually decreasing thickness may be provided at the end of the region where the slit is formed, and the stress dispersing portion may be connected to the bottom portion with the inclined surface. Thus, if the slit end is inclined, the hygiene is excellent.

  The valve members 5A and 5B are accommodated in the valve member accommodating portion 15 having an inner diameter larger than the inner diameter of the flow path 14, but in the present invention, the valve member is not the valve member accommodating portion but the open end of the connection port. It may be stored in. At this time, it is preferable that the valve member is housed in a position flush with the connection port in terms of being easy to disinfect the valve member and being hygienic.

(Example 1)
The valve member 5A shown in FIG. 2 and the needleless connector 1 shown in FIG. 1 were manufactured as follows.
Specifically, it consists of silicone raw rubber (methyl vinyl polysiloxane, trade name “KE-551-U”, manufactured by Shin-Etsu Chemical Co., Ltd.) and a vulcanizing agent (trade name “C-8A”, manufactured by Shin-Etsu Chemical Co., Ltd.). After injecting a predetermined amount of the silicone rubber composition into the compression mold, the upper mold was closed to obtain a molded product including a pair of circular recesses in advance under the conditions of a molding temperature of 175 ° C., a vulcanization time of 300 sec, and a molding pressure of 20 MPa. Subsequently, the slit part 8 and the outer part of the product were punched out into the molded product using a big die to obtain a needleless connector valve member 5A. At this time, the slit 8 and the outer shape of the product may be punched at the same time or may be separate processes.
The dimensions are as follows:
External dimensions: φ10 mm, thickness: 1.5 mm, slit width: 4 mm, diameter of circular recess as stress dispersion portion 9A: φ1.5 mm, depth of circular recess: 0.3 mm.
Next, using a polycarbonate resin, the needleless connector tube 4 shown in FIG. 1 having the valve member holding portion 15 having an inner diameter of 9.9 mm and a depth of 1.0 mm was produced.
A needleless connector valve member 5A is housed in the valve member holding portion 15 to manufacture the needleless connector 1.

(Example 2)
The valve member 5B shown in FIG. 3 and the needleless connector 1 shown in FIG. 1 were manufactured as follows.
Specifically, it consists of silicone raw rubber (methyl vinyl polysiloxane, trade name “KE-551-U”, manufactured by Shin-Etsu Chemical Co., Ltd.) and a vulcanizing agent (trade name “C-8A”, manufactured by Shin-Etsu Chemical Co., Ltd.). After injecting a predetermined amount of the silicone rubber composition into the compression molding die, the upper die was closed to obtain a molded product including an annular groove portion in advance under the conditions of a molding temperature of 175 ° C., a vulcanization time of 300 sec, and a molding pressure of 20 MPa. Subsequently, the slit part 8 and the outer part of the product were punched out into the molded product using a big die to obtain a needleless connector valve member 5A. At this time, the slit 8 and the outer shape of the product may be punched at the same time or may be separate processes.
Each dimension is as follows.
External dimension φ10 mm, thickness 1.5 mm, slit width 4 mm, width of annular groove portion 1.5 mm as stress dispersion portion 9B, depth of this groove portion 0.3 mm.
Next, using a polycarbonate resin, the needleless connector tube 4 shown in FIG. 1 having the valve member holding portion 15 having an inner diameter of 9.9 mm and a depth of 1.0 mm was produced.
A needleless connector valve member 5A is housed in the valve member holding portion 15 to manufacture the needleless connector 1.

(Comparative Example 1)
A valve member and a needleless connector without a stress dispersion part were manufactured as follows.
A silicone rubber composition comprising a silicone raw rubber (methyl vinyl polysiloxane, trade name “KE-551-U”, manufactured by Shin-Etsu Chemical Co., Ltd.) and a vulcanizing agent (trade name “C-8A”, manufactured by Shin-Etsu Chemical Co., Ltd.). After injecting a predetermined amount into the compression mold, the upper mold was closed, and a molded product having a flat surface and back surface was obtained under conditions of a molding temperature of 175 ° C., a vulcanization time of 300 sec, and a molding pressure of 20 MPa. Subsequently, a slit part and a product outer shape part were punched out into a molded product using a big die to obtain a valve member for a needleless connector.
Each dimension is as follows.
External dimensions φ10mm, thickness 1.5mm, slit width 4mm
Next, using a polycarbonate resin, the needleless connector tube 4 shown in FIG. 1 having the valve member holding portion 15 having an inner diameter of 9.9 mm and a depth of 1.0 mm was produced.
A needleless connector was manufactured by accommodating the valve member for a needleless connector in the valve member holding portion 15.

(Evaluation of resealability)
The sealability of each needleless connector manufactured as follows was evaluated.
Specifically, the syringe luer is inserted and removed 200 times in the slit of the needleless connector valve member housed in the valve member holding portion 15 of the needleless connector tube 4 to visually check whether a crack has occurred at the slit end. Confirmed.
In addition, as a pressure resistance test, the connector was gradually filled with water, pressure was applied, and the pressure value at the time when water leaked from the slit portion of the valve member was read.
As a result, the needle-less connector valve member of Examples 1 and 2 was not confirmed to crack at the slit end even after 200 insertions / removals. The result of the pressure test was 130 kPa.
On the other hand, the needle-less connector valve member of Comparative Example 1 was confirmed to crack at the end of the slit after 115 times. The result of the pressure resistance test at that time was 83 kPa.

1 Needleless connector 4 Needleless connector pipe 5A, 5B, 5C, 5D Valve member (valve member for needleless connector)
8 Slits 9A, 9B, 9C, 9D Stress distribution portions 9a, 9c Bottomed holes 9b, 9d Groove 11 First connection port 12 Second connection port 13 Third connection port 14 Channel 15 Valve member holding portion

Claims (4)

A valve member made of silicone rubber used in a needleless connector,
Having a slit penetrating in the thickness direction, and a stress dispersion portion at the end in the length direction of the slit,
The stress dispersion part is composed of a pair of recesses recessed in the thickness direction from both surfaces of the valve member.   The valve member according to claim 1, wherein the recess is a bottomed hole or a groove.   The valve member according to claim 2, wherein the groove is arcuate or annular. A needleless connector pipe having at least two connection ports connectable to the tube body, a flow path communicating these connection ports, and a valve member housing disposed in the vicinity of the first connection port; and the valve The needle-less connector provided with the valve member of any one of Claims 1-3 accommodated in the member accommodating part.

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