WO2022107796A1 - 医療用コネクタ - Google Patents
医療用コネクタ Download PDFInfo
- Publication number
- WO2022107796A1 WO2022107796A1 PCT/JP2021/042197 JP2021042197W WO2022107796A1 WO 2022107796 A1 WO2022107796 A1 WO 2022107796A1 JP 2021042197 W JP2021042197 W JP 2021042197W WO 2022107796 A1 WO2022107796 A1 WO 2022107796A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve body
- housing
- outer housing
- peripheral surface
- inner housing
- Prior art date
Links
- 230000002093 peripheral effect Effects 0.000 claims description 123
- 238000003825 pressing Methods 0.000 claims description 27
- 238000000465 moulding Methods 0.000 claims description 15
- 239000011347 resin Substances 0.000 description 22
- 229920005989 resin Polymers 0.000 description 22
- 210000000078 claw Anatomy 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- -1 polypropylene Polymers 0.000 description 7
- 229920002379 silicone rubber Polymers 0.000 description 6
- 239000008280 blood Substances 0.000 description 5
- 210000004369 blood Anatomy 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000000502 dialysis Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 239000004944 Liquid Silicone Rubber Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/10—Tube connectors; Tube couplings
- A61M2039/1066—Tube connectors; Tube couplings having protection means, e.g. sliding sleeve to protect connector itself, shrouds to protect a needle present in the connector, protective housing, isolating sheath
Definitions
- the present invention relates to a medical connector having a valve body having a slit formed therein, and more particularly to a medical connector used for a fluid path in a medical field such as a venous line and a blood circuit for dialysis.
- Patent Document 1 discloses a medical connector including a valve body having a slit, a tubular housing for holding the valve body, and an annular holding member. These medical connectors have a structure in which the valve body is assembled to the housing and the peripheral edge portion of the valve body is sandwiched from both sides in the thickness direction by the housing and the pressing member. Further, an annular groove is formed in the peripheral edge portion of the valve body, and a claw-shaped locking convex portion to be inserted into the groove is formed in the holding member.
- the medical connector of Patent Document 1 is used by inserting a male connector such as a syringe into a slit of a valve body, but depending on the medical procedure, the male connector is used many times while the medical connector is used for a long period of time. May also be connected. At this time, due to the deformation of the valve body, the peripheral edge portion of the valve body may come off from the locking convex portion of the pressing member and fall out inward. As a means to prevent the peripheral edge of the valve body from coming off, lubricate the slit of the valve body to improve the slipperiness between the male connector and the slit, and reduce the load on the peripheral edge of the valve body. However, it is difficult to prevent the peripheral edge of the valve body from coming off because the effect of the lubricant is reduced and the sliding resistance is increased with the connection of the male connector.
- the upward extending portion of the valve body is formed so as to surround the outer peripheral portion of the locking convex portion of the holding member, the apex of the upward extending portion is constrained to the housing or the like. If not, it was found that when the valve body was pushed and deformed by the male connector inserted into the slit, the upward extending portion was disengaged from the locking convex portion and easily fell out inward. In particular, when the vertices of the upward extending portion are unevenly distributed in the radial direction of the extending portion, the upward extending portion is more likely to fall off.
- An object of the present invention is to provide a medical connector capable of more reliably suppressing the valve body from coming off when a male connector is connected.
- the medical connector according to one aspect of the present invention is inserted into a valve body having a slit, a tubular outer housing that houses the valve body and holds the valve body, and a cylinder of the outer housing.
- a cylindrical inner housing that supports the lower surface of the valve body is provided, and a joint is formed between the valve body and the outer housing, and the joint is located radially outside the connector from the upper end of the inner housing. It is characterized by being.
- the valve body since the valve body is joined to the inner peripheral surface of the outer housing, the valve body can be firmly fixed, and the peripheral edge of the valve body falls inside the connector when the male connector is connected. Is suppressed.
- the joint since the joint is located radially outside the connector from the upper end of the inner housing, the force applied to the valve body when connecting the male connector is less likely to act on the joint, and peeling of the joint is suppressed. ..
- the medical connector according to another aspect of the present invention has a valve body having a slit formed therein, a cylindrical outer housing for accommodating the valve body in a cylinder and holding the valve body, and an upper end portion of the outer housing. It is provided with a fixed presser member and a cylindrical inner housing that is inserted into the cylinder of the outer housing and supports the lower surface of the valve body.
- a fixed presser member and a cylindrical inner housing that is inserted into the cylinder of the outer housing and supports the lower surface of the valve body.
- the outer peripheral surface of the valve body is joined to the inner peripheral surface of the outer housing, it is possible to prevent the peripheral edge portion of the valve body from falling inside the connector when the male connector is connected.
- the resin constituting the valve body is injected into a support member having a fine shape portion such as a small groove or a gap for insert molding or multicolor molding, it is difficult for the resin to enter the fine shape portion and air bubbles remain. There is. If bubbles remain, the bubbles tend to be the starting point of peeling, and the valve body tends to peel off from the support member.
- the presser member and the inner housing that are separate from the outer housing, for example, the presser member and the inner housing can be assembled after the valve body and the outer housing are integrally molded. Therefore, the outer housing can be made into a simple shape, and it is possible to eliminate a fine shape portion where air bubbles tend to remain during insert molding. That is, air bubbles are less likely to be generated on the joint surface between the valve body and the outer housing, and high joint strength can be ensured.
- the medical connector according to another aspect of the present invention has a valve body having a slit formed therein, a tubular outer housing for accommodating the valve body in a cylinder and holding the valve body, and a tubular outer housing in the cylinder of the outer housing. It comprises a tubular inner housing that is inserted and supports the lower surface of the valve body, the valve body extending downward beyond the slitted valve body and the lower end of the valve body, the outer housing and the inner housing. It has an extension portion located between and, and is characterized in that the outer peripheral surface of the extension portion and the inner peripheral surface of the outer housing are joined to each other.
- the joining area is large, the fixing force of the valve body to the outer housing is strongly exerted, and the male connector is used. It is suppressed that the peripheral edge of the valve body falls inside the connector at the time of connection.
- the medical connector according to another aspect of the present invention has a valve body having a slit formed therein, a tubular outer housing for accommodating the valve body in a cylinder and holding the valve body, and a tubular outer housing in the cylinder of the outer housing. It is provided with a cylindrical inner housing that is inserted and supports the lower surface of the valve body, the outer peripheral surface of the valve body and the inner peripheral surface of the outer housing are joined to each other, and a part of the valve body is inside the cylinder of the inner housing. The outer peripheral surface of the valve body and the inner peripheral surface of the inner housing are not joined to each other.
- the outer peripheral surface of the valve body is joined to the inner peripheral surface of the outer housing, it is possible to prevent the peripheral edge portion of the valve body from falling inside the connector when the male connector is connected.
- the outer peripheral surface of the valve body inserted into the cylinder of the inner housing is not joined to the inner peripheral surface of the inner housing, the feeling of resistance when connecting the male connector is reduced, and the connection operation of the male connector is performed. Becomes smoother.
- the joint is peeled off due to the deformation of the valve body when the male connector is connected, but at that time, a force to peel off the joint is required. And the resistance increases.
- a medical connector includes a valve body having a slit formed therein, and a tubular housing for accommodating the valve body in a cylinder and holding the valve body, and is engaged with an upper end portion of the housing.
- the valve body is provided with a stop convex portion, and the valve body extends upward so as to face the outer peripheral surface of the valve body across the valve body in which the slit is formed, the upper groove portion into which the locking convex portion is inserted, and the upper groove portion. It has an extension portion, the apex of the upper extension portion is formed outside the center in the width direction of the upper extension portion, and the outer peripheral surface of the upper extension portion and the inner peripheral surface of the housing are joined to each other. It is characterized by that.
- the upward extension portion is joined to the inner peripheral surface of the housing, and the apex of the upward extension portion is formed outside the center of the upward extension portion in the width direction.
- the elongation of the upward extending portion is suppressed, and the falling off of the upward extending portion can be suppressed more effectively.
- the radial inside of the upward extending portion becomes thick in the axial direction and is radially inward by the male connector.
- the thick portion When pulled, the thick portion stretches and is partially displaced inside the locking convex portion, and the portion displaced inside the locking convex portion is caught inside the locking convex portion and the locking convex portion is engaged. There is a possibility that the phenomenon of not returning to the outside of the part may occur.
- valve body and the outer housing are integrally molded products. In this case, it becomes easy to increase the joint strength between the valve body and the outer housing, and the peeling of the joint portion is further suppressed. Therefore, it is possible to more effectively suppress the valve body from coming off when the male connector is connected.
- a groove portion into which the upper end portion of the inner housing is inserted is formed on the lower surface of the valve body, and the groove portion is in the radial direction of the connector with respect to the outer edge of the portion exposed to the outside of the valve body. It is preferably formed on the inside. In this case, when the male connector is connected, the valve body is deformed at the portion where the groove portion is formed, and the force acting on the joint portion becomes small. Therefore, it is possible to more effectively suppress the valve body from coming off when the male connector is connected.
- the medical connector according to the present invention it is possible to more reliably suppress the valve body from coming off when the male connector is connected.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG.
- FIG. 2 is a sectional view taken along line BB in FIG.
- FIG. 5 is a cross-sectional view taken along the line CC in FIG.
- FIG. 7 is a sectional view taken along line DD in FIG. 7.
- FIG. 1 is a perspective view of the medical connector 1
- FIG. 2 is a plan view and a front view of the medical connector 1.
- FIG. 3 is a sectional view taken along line AA in FIG. 2
- FIG. 4 is a sectional view taken along line BB in FIG.
- the medical connector 1 includes a valve body 10, a cylindrical outer housing 20 that houses the valve body 10 in a cylinder and holds the valve body 10, and a cylinder of the outer housing 20. It is provided with a tubular inner housing 30 that is inserted inside and supports the lower surface of the valve body 10.
- the valve body 10 is formed with a slit 13 that allows insertion of a male connector such as a syringe 100 (see FIG. 5 described later) that does not have a metal needle.
- the slit 13 is closed in a state where the male connector is not connected, and the valve body 10 closes the upper end opening of the outer housing 20.
- the outer housing 20 and the inner housing 30 are cylindrical bodies having both upper and lower ends (both ends in the axial direction) open.
- the direction along the axial direction of the outer housing 20 is defined as the "vertical direction" of the medical connector 1 and each component of the connector, and the valve body 11 of the valve body 10 in which the slit 13 is formed is arranged.
- the side is "upper”.
- the outer housing 20 and the inner housing 30 are arranged so that their axial directions coincide with each other.
- the medical connector 1 is a female connector to which a male connector is connected by being inserted into a slit 13 of a valve body 10.
- the valve body 10 is, for example, an elastic body made of silicone rubber, and when the tip of the male connector is inserted into the slit 13, it is pushed downward and elastically deformed, so that the slit 13 opens. ing. Further, when the tip of the male connector is pulled out from the valve body 10, the valve body 10 returns to its original shape and the slit 13 is closed.
- the medical connector 1 is a so-called needleless connector to which a male connector having no metal needle can be connected.
- the outer edge of the portion exposed to the outside of the valve body 10 is located radially outside the medical connector 1 from the upper end P2 of the inner housing 30 and is joined to the inner peripheral surface of the outer housing 20.
- the outer edge of the portion exposed to the outside of the valve body 10 is the upper end P1 of the outer peripheral surface in the present embodiment.
- the joint portion 17 between the valve body 10 and the outer housing 20 is located radially outside the connector from the upper end P2 of the inner housing 30, and is configured so as not to be peeled off when the male connector is connected. Therefore, the valve body 10 can be effectively suppressed from falling off, and the infiltration of the chemical solution or the like between the valve body 10 and the outer housing 20 is suppressed.
- the medical connector 1 is attached to the plug base 50, and the medical plug 5 including the medical connector 1 and the plug base 50 is configured.
- the medical plug 5 is a connecting device used for connecting a venous line, a blood circuit, a blood access catheter, or the like.
- the lower end opening of the medical connector 1 is connected to the upper end opening of the inner cylinder portion 52 of the plug base 50.
- the medical plug 5 may be attached to the T-shaped tube base 60 shown in FIG. 10 described later or the three-way stopcock base 70 shown in FIG.
- the plug base 50 includes an outer cylinder portion 51 and an inner cylinder portion 52, and has a structure in which a flow path through which a chemical solution or the like flows is formed inside the inner cylinder portion 52.
- the inner cylinder portion 52 is an male lure portion that is inserted into a female connector (not shown), and has a tapered shape in which the outer diameter gradually decreases toward the lower end.
- the outer cylinder portion 51 has an inner diameter larger than the outer diameter of the inner cylinder portion 52, and is arranged so as to surround the inner cylinder portion 52.
- a spiral lock groove 58 is formed on the inner peripheral surface of the outer cylinder portion 51.
- the female connector to which the inner cylinder portion 52 is connected is inserted between the outer cylinder portion 51 and the inner cylinder portion 52, and is connected to the plug base 50 by using the lock groove 58, for example.
- the plug base 50 is made of a hard resin material.
- the resin constituting the plug base 50 is, for example, a polyolefin such as polypropylene, but may be polycarbonate, polyethylene terephthalate, polyvinyl chloride, or the like, and is not particularly limited.
- the outer cylinder portion 51 and the inner cylinder portion 52 are integrally molded products, and are connected to each other at the upper part of the plug base 50.
- the upper end of the inner cylinder portion 52 is positioned so as to be radially aligned with the upper end of the outer cylinder portion 51, while the lower end of the inner cylinder portion 52 projects downward beyond the lower end of the outer cylinder portion 51.
- An opening 53 and a first groove 54 are formed in the upper part of the outer cylinder 51.
- the opening 53 is a portion into which the locking claw 23 of the medical connector 1 is inserted, is formed through the cylinder wall of the outer cylinder portion 51, and is used for connecting the medical connector 1 and the plug base 50.
- the material of the outer housing 20 is limited.
- the medical connector 1 and the plug base 50 are fixed by welding or an adhesive, the material of the plug base 50 is also limited. By physically connecting the medical connector 1 and the plug base 50, it is possible to mold the plug base 50, which is a member to be in contact with the liquid, with a preferable material.
- a plurality of openings 53 are formed along the circumferential direction of the outer cylinder portion 51. Further, a first groove portion 54 extending in the vertical direction from the upper end of the outer cylinder portion 51 is formed between the openings 53. The convex portion 24 of the medical connector 1 is inserted into the first groove portion 54.
- a recess 55 extending in the vertical direction is formed on the outer peripheral surface of the outer cylinder portion 51.
- a plurality of recesses 55 extend from the central portion in the vertical direction of the outer cylinder portion 51 to the lower end, and a plurality of recesses 55 are formed along the circumferential direction of the outer cylinder portion 51.
- the upper end portion of the inner cylinder portion 52 has a tapered shape in which the outer diameter gradually decreases from the connecting portion with the outer cylinder portion 51 toward the upper end.
- the upper end portion of the inner cylinder portion 52 is inserted into the cylinder of the inner housing 30 of the medical connector 1. Since the diameter of the inner housing 30 gradually decreases from the lower end toward the upper end P2, it is preferable that the upper end portion of the inner cylinder portion 52 has a tapered shape that matches the shape of the inner housing 30. Further, the inner diameter of the inner cylinder portion 52 is large near the upper end.
- an annular second groove 56 is formed between the outer cylinder 51 and the inner cylinder 52 so as to surround the inner cylinder 52.
- the lower end portion of the inner housing 30 is inserted into the second groove portion 56.
- a protrusion 57 is formed on the outside of the second groove portion 56.
- the protrusion 57 is formed in an annular shape around the second groove portion 56.
- the protrusion 57 presses the lower end of the valve body 10 and sandwiches the lower end of the valve body 10 together with the outer housing 20.
- the tip of the protrusion 57 may be flat, but it is preferable that the tip is formed of two slopes and the tip is sharp because the valve body 10 can be compressed more strongly.
- a gap is formed between the outer cylinder portion 51 and the protrusion 57 into which the locking claw 23 of the medical connector 1 can be inserted.
- the medical connector 1 includes a valve body 10, an outer housing 20, and an inner housing 30.
- a valve body 10 As described above, the medical connector 1 includes a valve body 10, an outer housing 20, and an inner housing 30.
- each component of the medical connector 1 will be described in detail.
- the valve body 10 is a member that includes a slit 13 that penetrates the valve body 10 and elastically deforms when a male connector such as a syringe 100 is inserted into the slit 13.
- the valve body 10 is inserted into the cylinder of the outer housing 20 and is supported by the inner housing 30 and is in close contact with each housing.
- the valve body 10 is preferably made of a material containing an elastomer, and is preferably a thermosetting elastomer.
- it is composed of synthetic rubber such as butadiene rubber, nitrile rubber, isoprene rubber, fluororubber, styrene rubber, and silicone rubber. Of these, styrene rubber and silicone rubber are preferable from the viewpoint of bondability with the outer housing 20 during injection molding.
- the valve body 10 has a valve body portion 11 in which a slit 13 is formed, and an extension portion 12 formed on the outer peripheral side of the valve body portion 11.
- the valve main body 11 is formed in a substantially disk shape, and has a size that closes the upper end opening of the outer housing 20 between the valve main body 11 and the valve outer peripheral portion.
- the upper surfaces of the valve main body portion 11 and the valve outer peripheral portion have a perfect circular shape, are formed flat along the radial direction of the outer housing 20, and are flush with the upper end of the outer housing 20. Further, the upper surface of the outer housing 20 is entirely exposed and is not covered by the outer housing 20 or other members.
- the valve main body 11 and the valve outer peripheral portion have a thickness that can seal the upper end opening of the outer housing 20 and do not hinder the insertion of the male connector.
- An example of the thickness of the valve body 11 is 0.5 mm to 2 mm.
- the slit 13 is formed at the radial center portion of the valve body portion 11 so as to penetrate the valve body portion 11 in the thickness direction.
- the slit 13 is formed in a thin line in a plan view. In the present embodiment, three slits 13 are formed at equal intervals along the radial direction from the center of the upper surface of the valve main body 11, but the length, number, and the like of the slits 13 are not particularly limited.
- the slits 13 may be formed as a straight line in a plan view, or four or more slits 13 may be formed radially.
- the outer peripheral surface of the valve body 10 is joined to the inner peripheral surface of the outer housing 20 and is in close contact with the inner peripheral surface of the outer housing 20 with a strength that does not peel off even when the male connector is connected.
- the joint portion 17 between the valve body 10 and the outer housing 20 is formed at least at the upper end of the outer peripheral surface of the valve body 10. In the present embodiment, the joint portion 17 is formed from the upper end of the valve body 10 (the upper end P1 of the outer peripheral surface) to the lower end of the extending portion 12.
- the joint portion 17 may be formed by an adhesive, but is preferably formed by injection molding. It is preferable that the valve body 10 and the outer housing 20 are integrally molded products.
- a groove 14 into which the upper end of the inner housing 30 is inserted is formed on the lower surface of the valve body 10.
- the valve main body portion 11 is formed to be thick, and the portion where the groove portion 14 is formed becomes the thin-walled portion 15 whose thickness is thinner than the other portions.
- the upper end P2 of the inner housing 30 is in contact with the thin-walled portion 15 at the innermost portion of the groove portion 14.
- the groove portion 14 is formed in an annular shape along the circumferential direction at the peripheral edge portion of the lower surface of the valve main body portion 11.
- the groove portion 14 is formed radially inside the medical connector 1 with respect to the upper end P1 of the outer peripheral surface of the valve body 10.
- the upper end P1 of the outer peripheral surface of the valve body 10 is located radially outside the valve body 10 with respect to the groove portion 14.
- the upper end of the groove portion 14 is located above the central portion of the axial length of the valve main body portion 11, and a large space is formed in the groove portion 14.
- the distance until the valve body 10 comes into contact with the inner surface of the inner housing 30 can be lengthened, the insertion resistance can be reduced, and the valve body 10 is applied to the peripheral edge of the valve body 10. The load can be reduced.
- the valve main body 11 inside the groove 14 is thick, the outer peripheral surface of the male connector can be firmly sealed.
- the valve body 10 is arranged in a state where the portion surrounded by the groove portion 14 is inserted into the cylinder of the inner housing 30.
- the groove portion 14 is formed in a substantially inverted V shape in cross-sectional view, and the portion inserted into the cylinder of the inner housing 30 of the valve body 10 has a tapered shape whose diameter gradually decreases toward the lower end. Further, the inner diameter of the inner housing 30 gradually increases from the upper end P2 toward the lower end. Therefore, when the male connector is inserted, a space is formed between the valve main body 11 and the inner peripheral surface of the inner housing 30 so that the valve main body 11 is displaced outward, and this space exists. Therefore, the insertion resistance of the male connector is reduced.
- a part of the valve body 11 is inserted into the cylinder of the inner housing 30, but between the outer peripheral surface of the valve body 11 and the inner peripheral surface of the inner housing 30.
- There is a large gap and the outer peripheral surface of the valve body 11 and the inner peripheral surface of the inner housing 30 are not joined to each other.
- a force for peeling off the joint is not required when connecting the male connector, so that the feeling of resistance at the time of connection is reduced. , The connection operation of the male connector becomes smoother.
- valve body 10 and the internal housing 30 are not joined, but the valve body 10 and the internal housing 30 can be joined.
- the groove portion 14 is formed large, the joint portion between the inner surface of the inner housing 30 and the outer peripheral surface of the valve main body portion 11 can be minimized, and the joint portion hinders elastic deformation of the valve body 10. It is possible to reduce the situation.
- the extending portion 12 is formed on the outer peripheral portion of the valve and extends downward, and is formed in a substantially cylindrical shape. From the viewpoint of increasing the joint area of the extending portion 12 with the outer housing 20, it is preferable that the extending portion 12 extends downward from the valve main body portion 11.
- the vertical length of the extending portion 12 is longer than the vertical length of the center of the valve main body portion 11. Further, it is preferable that the extending portion 12 is larger than the outer diameter of the valve main body portion 11. Further, it is preferable that the extending portion 12 is larger than the diameter of the exposed portion with the outside of the valve body 10. Further, it is preferable that the extending portion 12 is larger than the outer diameter of the valve body 10.
- the vertical length of the extending portion 12 is longer than the thickness of the valve main body portion 11, and the extending portion 12 extends to the vicinity of the lower ends of the outer housing 20 and the inner housing 30, and the outer peripheral surface of the extending portion 12 is formed. Is joined to the inner peripheral surface of the outer housing 20.
- the joining area can be increased, the holding property of the valve body 10 is improved, and the joining state between the valve body 10 and the outer housing 20 can be maintained satisfactorily.
- the extending portion 12 has a shape in which the inner diameter and the outer diameter gradually increase from the upper end to the lower end.
- the extending portion 12 is joined to the inner peripheral surface of the outer housing 20, but is not joined to the inner housing 30.
- the extending portion 12 is sandwiched between the outer housing 20 and the inner housing 30, and is in close contact with the outer peripheral surface of the inner housing 30.
- the lower portion of the extension portion 12 is inserted into the upper portion of the plug base 50 together with the outer housing 20 and the inner housing 30.
- a convex portion 16 projecting outward in the radial direction is formed at the lower end portion of the extending portion 12.
- the convex portion 16 is preferably formed in an annular shape along the circumferential direction of the extending portion 12.
- the convex portion 16 and the outer housing 20 are joined to increase the joining area.
- a groove is formed on the upper surface of the convex portion 16, and the inner surface of the outer housing 20 is joined to the outer surface of the groove.
- the lower surface of the convex portion 16 is flat and is pressed by the protrusion 57 of the plug base 50 to be recessed. Further, the convex portion 16 is pressed from above and below by the protrusion 57 and the protrusion 26 of the outer housing 20.
- the convex portion 16 is strongly sandwiched between the outer housing 20 and the plug base 50, so that the holding property of the valve body 10 is further improved.
- the valve body 10 extends to the upper end of the medical connector 1 and is joined to the outer housing 20 extending to the upper end of the medical connector 1. That is, the upper side of the valve body 10 is also joined to the outer housing 20.
- a joint portion 17 is formed on the radial outer side of the slit 13 of the valve body 10, and a large joint area is formed.
- the outer housing 20 is a cylindrical member having both upper and lower ends open, covers the outer peripheral surface of the valve body 10, and holds the valve body 10 together with the inner housing 30.
- the valve body 10 does not project from the upper and lower ends of the outer housing 20, and the entire valve body 10 is housed in the cylinder of the outer housing 20.
- the outer housing 20 is made of a hard resin material. Examples of the resin constituting the outer housing 20 include polycarbonate, polybutylene terephthalate, polyethylene terephthalate, polyether ether ketone, polyphenylene ether, polyphenylene oxide, polyamide, polyolefin and the like. Of these, polybutylene terephthalate, polyethylene terephthalate, and polyamide are preferable.
- the outer housing 20 has a small diameter portion 21 and a large diameter portion 22.
- the small diameter portion 21 has a smaller outer diameter than the large diameter portion 22, and is formed on the upper portion of the outer housing 20. Similar to the valve body 10 and the inner housing 30, the small diameter portion 21 has a shape in which the inner diameter and the outer diameter gradually increase from the upper end to the lower end. Further, a screw thread 25 is formed on the outer peripheral surface of the small diameter portion 21. The thread 25 is used to lock the male connector connected to the medical connector 1.
- the large diameter portion 22 is formed with a locking claw 23 and a convex portion 24.
- the locking claw 23 and the convex portion 24 are used for connecting to the plug base 50 as described above.
- a plurality of locking claws 23 and convex portions 24 are alternately formed along the circumferential direction of the large diameter portion 22.
- the locking claw 23 has a shape extending in the vertical direction and having a lower portion projecting outward in the radial direction.
- the locking claw 23 is inserted between the outer cylinder portion 51 of the plug base 50 and the protrusion 57, and the lower portion of the locking claw 23 is inserted into the opening 53 of the outer cylinder portion 51 and hooked on the upper edge portion of the opening 53. ..
- the convex portion 24 is a portion to be inserted into the second groove portion 56 of the outer cylinder portion 51, and is formed in a plate shape parallel to the vertical direction and the radial direction.
- the large-diameter portion 22 is formed with a protrusion 26 projecting downward in the radial direction from the locking claw 23 and the convex portion 24.
- the protrusions 26 are formed, for example, in an annular shape along the circumferential direction of the outer housing 20.
- the protrusions 26 are arranged so as to overlap the protrusions 57 of the plug base 50 in the vertical direction, and increase the joint area with the valve body 10. Further, after assembly, the convex portion 16 of the valve body 10 is sandwiched together with the protrusion 57.
- the protrusion 26 has a shape with a sharp tip so that the protrusion 16 can be easily compressed by the protrusion 57.
- the valve body 10 and the outer housing 20 are configured as an integrally molded product (hereinafter referred to as "integrally molded product (Z)"). Then, from the upper end of the valve body 10 to the lower end of the convex portion 16, the entire outer peripheral surface of the valve body 10 in contact with the inner peripheral surface of the outer housing 20 is the joint portion 17.
- the joint portion 17 has, for example, a substantially constant joint strength (peeling strength) over the entire area.
- the joint portion 17 preferably has a joint strength such that the male connector is inserted into the slit 13 and the valve body 10 is elastically deformed so as not to be peeled off.
- the valve body 10 is also joined to the protrusion 26. By providing the protrusion 26, the area of the joint portion 17 can be increased.
- the integrally molded product (Z) is manufactured by, for example, insert molding.
- the resin constituting the valve body 10 is injected and injected into the outer housing 20 set in the injection molding die, and the outer housing 20 and the resin are integrated.
- an outer housing 20 made of polyethylene terephthalate or polycarbonate is set in a mold, and a two-component curable liquid silicone rubber is injection-injected into the mold as a resin constituting the valve body 10.
- the melting point (softening point) of the resin constituting the outer housing 20 is preferably higher than the molding temperature of the valve body 10.
- the liquid silicone rubber is cured and molded into a valve body 10 that is strongly adhered to the inner peripheral surface of the outer housing 20, and an integrally molded product (Z) in which the valve body 10 and the outer housing 20 are integrated is obtained.
- the integrally molded product (Z) can also be manufactured by other molding methods such as insert molding and multicolor molding (particularly two-color molding).
- the upper end portion of the outer peripheral surface is the upper end side of the medical connector 1 with respect to the upper end P2 of the inner housing 30 inserted into the groove portion 14 of the valve body portion 11 as described above. Moreover, it is located on the outer side in the radial direction and is joined to the inner peripheral surface of the outer housing 20.
- the valve body 10 and the outer housing 20 are integrally molded products (Z), and the entire surface where each member is in contact is a joint portion 17 having a substantially constant joining strength. Only the upper end portion of the outer peripheral surface of the outer peripheral surface may be joined to the outer housing 20, and the joining strength of the upper end portion may be higher than the other portions. Further, an annular portion extending inward in the radial direction may be provided at the upper end portion of the outer housing 20.
- the entire outer peripheral surface of the valve body 10 including the upper end P1 of the outer peripheral surface of the valve body 10 (the outer edge of the portion exposed to the outside of the valve body 10) is joined to the inner peripheral surface of the outer housing 20.
- the valve body 10 is stably held, and it becomes easy to suppress the intrusion of the chemical solution or the like between the valve body 10 and the outer housing 20.
- An annular groove portion 14 and a thin-walled portion 15 are formed on the peripheral edge portion of the valve main body portion 11, and the upper end P1 is located radially outside the groove portion 14 and the thin-walled portion 15. It should be noted that a non-joint portion existing at the upper end of the outer peripheral surface of the valve body is considered to be equivalent to that of the present invention as long as the object of the present invention is not impaired.
- the diameter of the upper surface of the valve body 10 and the inner diameter of the upper end of the outer housing 20 are larger than the outer diameter of the upper end P2 of the inner housing 30, and the entire outer edge of the upper surface of the valve body 10 is for medical use than the upper end P2 of the inner housing 30. It is located on the radial outer side of the connector 1.
- An annular joint 17 is formed at the upper end of the medical connector 1 along the outer edge of the upper surface of the valve body 10. Further, since the outer diameter of the valve body 10 (extending portion 12) and the inner diameter of the outer housing 20 increase from the upper end to the lower end, the entire joint portion 17 is in the radial direction from the upper end P2 of the inner housing 30. It is located on the outside.
- the inner housing 30 is a cylindrical member having both upper and lower ends open, has an outer diameter smaller than the inner diameter of the outer housing 20, and is arranged in the cylinder of the outer housing 20. Further, the inner housing 30 is inserted into the extending portion 12 of the valve body 10 formed in a cylindrical shape, and the upper end portion is inserted into the groove portion 14 of the valve body 10 and is in contact with the thin-walled portion 15. The inner housing 30 presses the valve body 10 from the inside and sandwiches the valve body 10 together with the outer housing 20. A male connector such as a syringe 100 is inserted into the cylinder of the inner housing 30. Therefore, the inner diameter of the inner housing 30 is larger than the outer diameter of the insertion portion of the male connector to be connected.
- the inner housing 30 is made of a hard resin material.
- the inner housing 30 may be made of the same resin as the outer housing 20, or may be made of a different resin.
- the inner housing 30 is not integrally molded with the valve body 10, and is in close contact with the inner peripheral surface of the valve body 10, but is not joined to the valve body 10. Therefore, it is not necessary to select the resin material in consideration of the bonding with the valve body 10.
- the lower end portion of the inner housing 30 extends below the extending portion 12 of the valve body 10 and is inserted into the second groove portion 56 of the plug base 50.
- the inner housing When assembling the inner housing to the integrally molded outer housing and valve body, the inner housing may be fixed with an adhesive or the like except for the vicinity of the upper end P2 to realize a state in which only the vicinity of the upper end P2 is not joined. Further, it is also possible to use the inner housing as two upper and lower members so that only the upper member is not joined to the valve body 10.
- the diameter of the internal housing 30 gradually increases from the upper end P2 toward the lower end, but the degree of diameter increase increases at the upper end.
- a step 31 is formed at the upper end of the inner housing 30, and the degree of diameter expansion changes with the step 31 as a boundary.
- the step 31 is formed in an annular shape above the position corresponding to the lower end of the valve body 11, for example.
- the male connector can be guided inward. Further, since the inner surface of the upper end portion of the inner housing 30 has a curved shape in which an edge is less likely to be formed, the situation where the valve body 10 sandwiched between the inner housing 30 and the male connector is cut by a load is reduced.
- FIG. 5 is a view showing a state in which the syringe 100 is connected
- FIG. 6 is a cross-sectional view taken along the line CC in FIG.
- the valve body 10 bends at the thin-walled portion 15, and the portion surrounded by the thin-walled portion 15 enters the cylinder of the inner housing 30.
- the slit 13 is opened and the tip end portion of the syringe 100 is introduced into the cylinder of the inner housing 30. Since there is a large gap between the valve body 11 and the internal housing 30, contact between the valve body 10 and the internal housing 30 is suppressed at least at the initial stage of insertion of the syringe 100, and the insertion resistance of the syringe 100 is reduced. Further, the load generated in the joint portion 17 in the radial direction is reduced, and the durability of the valve body 10 is improved.
- valve body 11 Since the valve body 11 is supported from the inside by the inner housing 30 and the upper end is joined to the outer housing 20, even if the valve body 11 is pressed downward by the syringe 100, the entire valve body 10 is formed. Does not fall into the cylinder of the inner housing 30.
- the pressing force of the syringe 100 acts on the thin-walled portion 15 as described above, and bends in the thin-walled portion 15. At this time, a certain amount of force acts on the joint portion 17 between the valve body 10 and the outer housing 20, but since the joint portion 17 is located on the radial outer side of the medical connector 1 than the thin-walled portion 15, the pressing force is applied. Is less likely to act on the joint portion 17, and peeling of the joint portion 17 is suppressed.
- the joint portion 17 is separated from the syringe, the deformability of the valve body 10 is improved and the load on the joint portion 17 generated when the male connector is connected is alleviated. Further, the pressing force acts on the upper end P2 of the inner housing 30 that supports the thin-walled portion 15, and the pressing force is received by the inner housing 30. Therefore, the pressing force of the syringe 100 acting on the joint portion 17 is reduced as compared with the case where the outer edge of the externally exposed portion of the valve body 10 is located at the same position in the radial direction as the upper end of the inner housing 30.
- the medical connector 1 even when the syringe 100 is connected, the outer surface of the upper end portion of the outer peripheral surface of the valve body 10 is joined to the inner peripheral surface of the outer housing 20, so that the joining area can be increased and the valve can be increased.
- the holding state of the body 10 is stably maintained. Further, even in a state where the connection between the valve body 10 and the outer housing 20 is maintained, the connection of the syringe 100 is not hindered, and a good connection operation is possible.
- the joint portion 17 is formed along the outer edge P of the upper end surface of the outer peripheral surface of the valve body 10, in other words, the outer edge of the upper surface of the valve body portion 11, the chemical solution between the valve body 10 and the outer housing 20 is formed. The infiltration of such substances is highly suppressed, and the medical connector 1 can be kept hygienic.
- the joint formed between the valve body and the outer housing is located radially outside the connector from the upper end of the inner housing, and the extension portion (downward extension portion) of the valve body is located. ) Is formed, and the outer peripheral surface of the extending portion and the inner peripheral surface of the outer housing are joined to each other, but one of the configurations can be omitted as long as the object of the present invention is not impaired. However, when both configurations are provided, it becomes easier to realize the above-mentioned effect as compared with the case where only one of the configurations is provided (the same applies to the second embodiment).
- FIG. 7 is a plan view and a front view of the medical connector 1x
- FIG. 8 is a sectional view taken along line DD in FIG. 7.
- the same reference numerals will be used and duplicate description will be omitted.
- the medical connector 1x is common to the medical connector 1 in that it includes a valve body 40, an outer housing 20x, and an inner housing 30x. Further, the connecting structure of the medical connector 1x and the plug base 50 is the same as that of the medical connector 1, and the outer housing 20x is provided with a locking claw 23 that engages with the opening 53 of the plug base 50. There is. Similar to the medical connector 1, the medical connector 1x has a valve body 40 arranged inside the outer housing 20x and an inner housing 30x arranged inside the valve body 40. The valve body 40 is formed by the outer housing 20x and the inner housing 30x. Has a sandwiched structure.
- the valve body 40 has a valve main body 41 having a slit 43 formed therein, a substantially cylindrical downward extending portion 42a extending downward from the outer peripheral portion of the valve body, and an upward extending portion extending upward from the outer peripheral portion of the valve body. It has 42b and is housed in the cylinder of the outer housing 20x.
- a lower groove portion 44 is formed on the lower surface of the valve body 40, and an upper end portion of the internal housing 30x is inserted into the lower groove portion 44.
- a convex portion 46 projecting outward in the radial direction is formed at the lower end portion of the downward extending portion 42a, and the convex portion 46 is pressed from above and below by the protrusion 26 of the outer housing 20x and the protrusion 57 of the plug base 50.
- the lower portion of the valve body 41 is inserted into the cylinder of the inner housing 30x, but the outer peripheral surface of the valve body 41 and the inner peripheral surface of the inner housing 30x are not joined to each other.
- valve body 40 is made of, for example, silicone rubber and is integrally molded with the outer housing 20x.
- the valve body 40 is integrally molded with only the outer housing 20x to form an intermediate member in which the valve body 40 and the outer housing 20x are joined, and then the pressing member 90 and the inner housing 30x are assembled to the joint surface. Bubbles are less likely to occur, and peeling of the joint surface can be prevented. When air bubbles are generated on the joint surface, they tend to be the starting point of peeling, but in the present embodiment, since air bubbles are less likely to be generated on the joint surface, high bonding strength can be ensured.
- valve body 40 and the inner housing 30 and the inner surface of the valve body 40 and the pressing member 90 can be in a state where they are not joined, the valve body 40 has good mobility and a male connector is inserted. It is possible to reduce the feeling of resistance.
- the medical connector 1x is different from the medical connector 1 in that the holding member 90 fixed to the upper end of the outer housing 20x is provided.
- the pressing member 90 presses the valve body 10 from above and sandwiches the valve body 10 together with the internal housing 30x.
- the pressing member 90 is an annular member arranged so as to surround the upper surface of the valve body 40 in a plan view.
- the upper surface of the presser member 90 is flat and flush with the upper surface of the valve body 40.
- the outer diameter of the pressing member 90 is substantially the same as the outer diameter of the upper end of the outer housing 20x.
- the valve body 40 has an upper groove portion 45 into which a part of the pressing member 90 is inserted, and the upper extending portion 42b extends so as to face the outer peripheral surface of the valve main body 41 across the upper groove portion 45.
- the outer peripheral surface of the valve body 40 and the inner peripheral surface of the outer housing 20x are joined to each other, but the outer peripheral surface of the upper extending portion 42b including the apex (upper end) of the upper extending portion 42b is the outer housing. It is preferably joined to the inner peripheral surface of 20x.
- the valve body 40 has a thin thickness at the portion where the lower groove portion 44 and the upper groove portion 45 are formed. Further, an upper groove portion 45 is formed on the upper surface of the valve body 40 at a position overlapping the lower groove portion 44 in the vertical direction, and the thickness of the portion in which the lower groove portion 44 and the upper groove portion 45 are formed is reduced from both sides in the vertical direction. A constriction is formed. Then, the constricted portion of the valve body 40 is pressed from above and below by the pressing member 90 and the internal housing 30x.
- the medical connector 1x has an outer housing 20x and a valve body 40 molded by insert molding or multicolor molding, and the outer housing 20x and the valve body 40 are joined to each other.
- an outer housing 20x to be bonded to the resin and a nest to form the shape of the valve body 40 without being bonded to the resin are inserted in the injection molding die, and the resin is injected.
- the resin is ejected from the inside toward the outer housing 20x side, and from the filling space between the nest and the nest (later the thin portion of the valve body 40) to the filling space between the nest and the outer housing 20x (later the valve body). It flows into the extension part of 40).
- the upper extending portion 42b of the valve body 40 is molded by a plurality of members called a nest and an outer housing 20x
- the lower extending portion 42a is also molded by a plurality of members called a nest and an outer housing 20x. It is easy to create minute gaps between a plurality of members through which gas can pass but not through resin. Therefore, when the resin is later poured into the filling space forming each extending portion, the gas existing in the filling space can be removed from the minute gap between the outer housing 20x and the nest. Therefore, bubbles are less likely to remain in the planned joining portion, the joining area can be increased, and the possibility of a peeling starting point due to bubbles can be reduced.
- the upper end of the outer housing 20x is formed with an annular protrusion extending inward, and is formed in an L-shape in cross-sectional view.
- the extension portion of the valve body 40 is more difficult to secure the length of the upper extension portion 42b than the lower extension portion 42a, and the joint strength of the upper extension portion 42b is lower than that of the lower extension portion 42a.
- the joint area can be increased.
- the upper end of the upward extending portion 42b is formed substantially flat and is joined to the annular projecting portion.
- the upper end (apex) of the upward extending portion 42b is not unevenly distributed either inside or outside in the radial direction of the extending portion, and the apex of the upward extending portion is from the center in the width direction of the upward extending portion. It is formed on the outside and the vertices are joined to the outer housing. In this case, it is possible to more effectively prevent the upward extending portion 42b from coming off the pressing member 90 and falling off.
- the upper end of the upward extending portion 42b is made non-flat, and the upper end (vertex) of the upward extending portion 42b is unevenly distributed radially outside the center in the width direction with respect to the center in the width direction at the base of the extending portion. Therefore, the apex of the upward extending portion may be formed outside the center in the width direction of the upward extending portion.
- the annular protrusion extending inward in the radial direction to the outer housing 20x is not limited to the upper end of the outer housing 20x, and may be provided at any part where the joint is to be strengthened.
- the upper end of the outer housing 20x is molded in an L shape, but in this case, a minute bubble may remain in the vicinity of the bending point. Therefore, it is possible to eliminate the annular protrusion extending inward and make the shape so that bubbles are less likely to remain.
- the presser member 90 may be positioned or the valve body 40 may be positioned with respect to the space for eliminating the annular protrusion.
- the downward extending portion 42a is formed in a substantially cylindrical shape like the extending portion 12 of the valve body 10, and extends downward from the valve main body portion 41 from the viewpoint of increasing the joint area with the outer housing 20x. Is preferable.
- the vertical length of the downward extending portion 42a is longer than the vertical length of the center of the valve main body portion 41. Further, the downward extending portion 42a is longer than the width dimension (diameter) of the inner portion of the constricted portion of the valve body 40.
- the downward extending portion 42a and the upward extending portion 42b are formed in a substantially cylindrical shape on the outer peripheral side of the valve body 40 with respect to the constricted portion, and form an outer peripheral surface of the valve body 40 joined to the outer housing 20x.
- the presser member 90 is made of a hard resin material, preferably made of the same type of resin as the outer housing 20x.
- the presser member 90 is joined to the upper end portion of the outer housing 20x by, for example, ultrasonic welding.
- a welded convex portion protruding downward before ultrasonic welding is formed on the peripheral portion of the presser member 90, and by melting the welded convex portion, the lower surface of the presser member 90 and the upper surface of the outer housing 20x are formed.
- the welding convex portion is formed in an annular shape along the circumferential direction of the pressing member 90.
- the presser member 90 is formed with a convex portion 91 projecting downward in the radial direction from the joint portion with the outer housing 20x.
- the convex portion 91 projects greatly downward and is formed in an annular shape along the inner edge of the pressing member 90. Further, the convex portion 91 is arranged so as to vertically overlap with the upper end P2 of the inner housing 30x. The upper end of the inner housing 30x is inserted into the lower groove 44 of the valve body 40, and the convex portion 91 of the pressing member 90 is inserted into the upper groove 45.
- the inner diameter of the presser member 90 is smaller than the diameter at the upper end P2 of the inner housing 30x, and the upper end P1 of the outer peripheral surface of the valve body 41 (the outer edge of the portion exposed to the outside of the valve body 40) is more medical than the upper end P2. It is located inside the radial side of the connector 1x. Further, the inner peripheral surface of the presser member 90 is substantially in contact with the outer peripheral surface of the valve body 41, but the presser member 90 is not joined to the valve body 40 in a plan view of the valve body 40. It is arranged so as to surround the upper surface. Since the presser member 90 and the inner housing 30x are assembled to the intermediate member formed by forming the outer housing and the valve body, the presser member 90 and the inner housing 30x are not joined to the valve body 40.
- valve body 40 is not joined to the pressing member 90, but the outer peripheral surface of the valve body 40 and the inner peripheral surface of the outer housing 20x are joined to each other.
- the valve body 40 and the outer housing 20x are preferably configured as an integrally molded product (Z), and the entire outer peripheral surface of the valve body 40 in contact with the outer housing 20x is a joint portion 47. Since the outer housing 20x has a simple shape without a U-shaped cross-sectional view at the joint portion with the valve body 40, a better valve with no air bubbles is formed when the valve body 40 and the outer housing 20x are integrally molded. Body 40 is obtained.
- the joint portion 47 has, for example, a substantially constant joint strength over the entire area.
- the upper end of the joint portion 47 is located radially outside the upper end P2 of the inner housing 30x, but the upper end P1 of the outer peripheral surface of the valve body 41 is located radially inside the upper end P2. ..
- the syringe 100 is connected to the medical connector 1x by inserting the tip of the syringe 100 into the slit 43 of the valve body 40.
- the valve body 40 is pushed downward and elastically deformed, and the slit 43 opens.
- the valve body 40 bends with the thin-walled portion sandwiched between the pressing member 90 and the internal housing 30x, and is surrounded by the thin-walled portion. The portion is inserted into the cylinder of the inner housing 30x.
- the slit 43 is opened and the tip end portion of the syringe 100 is introduced into the cylinder of the internal housing 30x.
- the outer peripheral surface of the valve body 40 is joined to the inner peripheral surface of the outer housing 20x, it is possible to prevent the peripheral edge portion of the valve body 40 from falling inside the medical connector 1x when the syringe 100 is connected. Will be done. Since the upper end of the joint portion 47 is located radially outside the thin portion of the valve body portion 41 that bends when the syringe 100 is connected, the pressing force of the syringe 100 does not easily act on the joint portion 47, and the joint portion The peeling of 47 is suppressed.
- the pressing member 90 is not joined to the valve body 40, the elastic deformation of the valve body 40 at the time of connecting the syringe 100 is not hindered. Therefore, it is possible to perform a good connection operation of the syringe 100 while suppressing the valve body 40 from coming off.
- the constricted portion of the valve body 40 is pressed from above and below by the convex portion 91 of the pressing member 90 and the internal housing 30x, but the external housing is provided with an engaging convex portion that presses the valve body 40 from above. It is possible to omit the presser member. Further, the internal housing that supports the lower surface of the valve body and the upward extending portion of the valve body are important components for suppressing the valve body from coming off, but to the extent that the object of the present invention is not impaired. One of the configurations can be omitted. However, when both configurations are provided, it becomes easier to realize the above-mentioned effect as compared with the case where only one of the configurations is provided.
- the valve body 10 having a tubular extending portion 12 extending from the peripheral edge portion of the valve main body portion 11 is exemplified, but the valve body does not have the extending portion 12. May be good.
- the valve body may be in the form of a disc as disclosed in Japanese Patent Application Laid-Open No. 2016-028753.
- the locking claw 23 and the convex portion 24 may not be formed on the outer housing of the medical connector.
- the medical connector 1y exemplified in FIGS. 10 and 11 includes an outer housing 20y in which a cylindrical large diameter portion 22y is formed.
- the medical connector 1y is attached to the T-shaped tube base 60, and the T-shaped mixed injection tube 6 including the medical connector 1 and the T-shaped tube base 60 is configured.
- the large diameter portion 22y of the outer housing 20y may be joined to the T-shaped tube base 60 by ultrasonic welding or the like, or a screw may be formed on the inner peripheral surface and fixed by screw fitting.
- the medical connector 1y is attached to the three-way stopcock base 70, and the three-way stopcock 7 including the medical connector 1y and the three-way stopcock base 70 is configured.
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Abstract
Description
図1~図6を参照しながら、第1の実施形態である医療用コネクタ1について以下詳細に説明する。図1は医療用コネクタ1の斜視図、図2は医療用コネクタ1の平面図及び正面図である。図3は図2中のAA線断面図、図4は図2中のBB線断面図である。
弁体10は、上述の通り、弁体10を貫通するスリット13を備え、スリット13にシリンジ100等のオスコネクタが挿入されることで弾性変形する部材である。弁体10は、外部ハウジング20の筒内に挿入されると共に、内部ハウジング30により支持され、各ハウジングに密着している。弁体10は、エラストマーを含む材質が好ましく、熱硬化性のエラストマーが好ましい。例えばブタジエンゴム、ニトリルゴム、イソプレンゴム、フッ素ゴム、スチレン系ゴム、シリコーンゴム等の合成ゴムにより構成される。中でも、射出成形する際の外部ハウジング20との接合性の観点から、スチレン系ゴム、シリコーンゴムが好ましい。
外部ハウジング20は、上下両端が開口した筒状部材であって、弁体10の外周面を覆い、内部ハウジング30と共に弁体10を保持する。弁体10は、外部ハウジング20の上下両端から突出しておらず、その全体が外部ハウジング20の筒内に収容されている。外部ハウジング20は、硬質の樹脂材料で構成される。外部ハウジング20を構成する樹脂としては、例えばポリカーボネート、ポリブチレンテレフタレート、ポリエチレンテレフタレート、ポリエーテルエーテルケトン、ポリフェニレンエーテル、ポリフェニレンオキシド、ポリアミド、ポリオレフィン等が挙げられる。中でも、ポリブチレンテレフタレート、ポリエチレンテレフタレート、ポリアミドが好ましい。
内部ハウジング30は、上下両端が開口した筒状部材であって、外部ハウジング20の内径よりも外径が小さく、外部ハウジング20の筒内に配置されている。また、内部ハウジング30は、筒状に形成された弁体10の延出部12内に挿入されると共に、上端部が弁体10の溝部14に挿入されて薄肉部15に当接している。内部ハウジング30は、弁体10を内側から押圧し、外部ハウジング20と共に弁体10を挟持する。内部ハウジング30の筒内には、シリンジ100等のオスコネクタが挿通される。このため、内部ハウジング30の内径は、接続されるオスコネクタの挿入部の外径よりも大きくなっている。
図7~図9を参照しながら、第2の実施形態である医療用コネクタ1xについて以下詳細に説明する。図7は医療用コネクタ1xの平面図及び正面図、図8は図7中のDD線断面図である。以下では、第1の実施形態と共通する構成については、同じ符号を用いて重複する説明を省略する。
Claims (6)
- スリットが形成された弁体と、
前記弁体を筒内に収容し、前記弁体を保持する筒状の外部ハウジングと、
前記外部ハウジングの筒内に挿入され、前記弁体の下面を支持する筒状の内部ハウジングと、
を備え、
前記弁体及び前記外部ハウジング間に接合部が形成され、
前記接合部は、前記内部ハウジングの上端よりもコネクタの径方向外側に位置している、医療用コネクタ。 - スリットが形成された弁体と、
前記弁体を筒内に収容し、前記弁体を保持する筒状の外部ハウジングと、
前記外部ハウジングの上端部に固定された押え部材と、
前記外部ハウジングの筒内に挿入され、前記弁体の下面を支持する筒状の内部ハウジングと、
を備え、
インサート成形又は多色成形により、前記弁体の外周面と前記外部ハウジングの内周面は、互いに接合されており、
前記押え部材は、平面視において前記弁体の上面を囲むように配置されている、医療用コネクタ。 - スリットが形成された弁体と、
前記弁体を筒内に収容し、前記弁体を保持する筒状の外部ハウジングと、
前記外部ハウジングの筒内に挿入され、前記弁体の下面を支持する筒状の内部ハウジングと、
を備え、
前記弁体は、前記スリットが形成された弁本体部と、前記弁本体部の下端を超えて下方に延び、前記外部ハウジングと前記内部ハウジングとの間に位置する延出部とを有し、前記延出部の外周面と前記外部ハウジングの内周面は互いに接合されている、医療用コネクタ。 - スリットが形成された弁体と、
前記弁体を筒内に収容し、前記弁体を保持する筒状の外部ハウジングと、
前記外部ハウジングの上端部に固定された押え部材と、
前記外部ハウジングの筒内に挿入され、前記弁体の下面を支持する筒状の内部ハウジングと、
を備え、
前記弁体の外周面と前記外部ハウジングの内周面は、互いに接合されており、
前記弁体の一部が前記内部ハウジングの筒内に挿入され、前記弁体の外周面と前記内部ハウジングの内周面は互いに接合されていない、医療用コネクタ。 - スリットが形成された弁体と、
前記弁体を筒内に収容し、前記弁体を保持する筒状のハウジングと、
を備え、
前記外部ハウジングの上端部に係合凸部が設けられ、
前記弁体は、前記スリットが形成された弁本体と、前記係合凸部が挿入される上方溝部と、前記上方溝部を隔てて前記弁本体の外周面と対向するように延びた上方延出部とを有し、前記上方延出部の頂点が上方延出部の幅方向中央より外側に形成されており、前記上方延出部の外周面と前記外部ハウジングの内周面は互いに接合されている、医療用コネクタ。 - 前記弁体の下面には、前記内部ハウジングの上端部が挿入される溝部が形成され、
前記溝部は、前記弁体の外部に露出している部分の外縁よりもコネクタの径方向内側に形成されている、請求項1~5のいずれか1項に記載の医療用コネクタ。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002035140A (ja) * | 2000-07-21 | 2002-02-05 | Terumo Corp | コネクタ |
WO2010073643A1 (ja) * | 2008-12-26 | 2010-07-01 | 二プロ株式会社 | 医療用コネクタ |
WO2015156272A1 (ja) * | 2014-04-08 | 2015-10-15 | 二プロ株式会社 | 医療用弁 |
JP2016028753A (ja) | 2007-06-05 | 2016-03-03 | ニプロ株式会社 | 医療用コネクタおよびその製造方法 |
JP2018130501A (ja) | 2017-02-17 | 2018-08-23 | テルモ株式会社 | 医療用コネクタ及び輸液セット |
JP2019118518A (ja) * | 2017-12-28 | 2019-07-22 | テルモ株式会社 | 医療用器具及びその製造方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2002035140A (ja) * | 2000-07-21 | 2002-02-05 | Terumo Corp | コネクタ |
JP2016028753A (ja) | 2007-06-05 | 2016-03-03 | ニプロ株式会社 | 医療用コネクタおよびその製造方法 |
WO2010073643A1 (ja) * | 2008-12-26 | 2010-07-01 | 二プロ株式会社 | 医療用コネクタ |
WO2015156272A1 (ja) * | 2014-04-08 | 2015-10-15 | 二プロ株式会社 | 医療用弁 |
JP2018130501A (ja) | 2017-02-17 | 2018-08-23 | テルモ株式会社 | 医療用コネクタ及び輸液セット |
JP2019118518A (ja) * | 2017-12-28 | 2019-07-22 | テルモ株式会社 | 医療用器具及びその製造方法 |
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