WO2022158063A1 - Raccord mâle - Google Patents

Raccord mâle Download PDF

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Publication number
WO2022158063A1
WO2022158063A1 PCT/JP2021/039103 JP2021039103W WO2022158063A1 WO 2022158063 A1 WO2022158063 A1 WO 2022158063A1 JP 2021039103 W JP2021039103 W JP 2021039103W WO 2022158063 A1 WO2022158063 A1 WO 2022158063A1
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WO
WIPO (PCT)
Prior art keywords
threaded portion
male connector
outer cylinder
thread
corner
Prior art date
Application number
PCT/JP2021/039103
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English (en)
Japanese (ja)
Inventor
木村篤志
浮田純次
上原康賢
Original Assignee
株式会社ジェイ・エム・エス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ジェイ・エム・エス filed Critical 株式会社ジェイ・エム・エス
Priority to JP2022576976A priority Critical patent/JPWO2022158063A1/ja
Publication of WO2022158063A1 publication Critical patent/WO2022158063A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • 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

Definitions

  • the present invention relates to male connectors. More particularly, it relates to a male connector with a male member and an internal thread surrounding the male member.
  • Enteral nutrition is known as a method of administering liquids containing nutritional supplements and drugs to patients who cannot eat orally.
  • a catheter is inserted into the digestive tract (for example, the stomach) from outside the body and placed in the patient.
  • Known catheters include a nasal catheter inserted through a patient's nose, a gastrostomy catheter inserted into a gastric fistula formed in the patient's abdomen, and the like.
  • a liquid is stored in a container.
  • a connector consisting of a male connector and a female connector is used to form a fluid flow path from the container to the catheter. This connector is composed of a male connector 910 shown in FIGS. 18A and 18B and a female connector 920 shown in FIGS. 19A and 19B.
  • a male connector 910 in FIGS. 18A and 18B has a cylindrical male member 911 and an outer cylinder 915 surrounding the male member 911 .
  • the proximal end of the male member 911 and the proximal end of the outer cylinder 915 are connected via a flange 918 protruding from the proximal end of the male member 911 in a flange shape.
  • the outer peripheral surface of the male member 911 has a male taper surface 912 whose outer diameter decreases toward the distal end of the male member 911 .
  • the male member 911 is provided with a channel 919 passing through the male member 911 along its longitudinal direction.
  • a female screw 916 is provided on the inner peripheral surface of the outer cylinder 915 facing the male member 911 .
  • a female connector 920 in FIGS. 19A and 19B has a hollow cylindrical female member 921 .
  • the inner peripheral surface of the female member 921 has a female tapered surface 922 whose inner diameter increases toward the tip of the female member 921 .
  • a spiral projection (male screw) 926 is provided on the outer peripheral surface of the female member 921 .
  • the male connector 910 is connected to the female connector 920 by inserting the male member 911 into the female member 921 and screwing the female screw 916 into the screw-like projection 926 . Since the male taper surface 912 of the male member 911 and the female taper surface 922 of the female member 921 have the same diameter and taper angle, they are taper-fitted in a liquid-tight manner.
  • a female connector 920 is used as an upstream (container side) connector and a male connector 910 is used as a downstream (patient side) connector with respect to the flow direction of liquids.
  • an outer cylinder 915 surrounds the male member 911, and a female screw 916 is provided on the inner peripheral surface of the outer cylinder 915. After performing enteral nutrition, liquids tend to remain in the gap 914 between the male member 911 and the outer cylinder 915 .
  • male connector 910 is provided at the upstream end of a catheter inserted into a patient, male connector 910 is left in the patient for an extended period of time along with the catheter. Liquid matter remaining in the gap 914 may deteriorate the sanitary condition of the male connector 910 .
  • Patent Document 1 describes a wiping tip for cleaning the male connector 910.
  • the wiping tip has a cylindrical portion made of foam or non-woven fabric having water absorption properties.
  • the tubular portion is inserted into the gap 914 between the male member 911 and the outer cylinder 915 . Any liquid remaining in the gap 914 (especially the thread groove of the female screw 916) is absorbed by the cylindrical portion and wiped off.
  • An object of the present invention is to provide a male connector that is easy to clean while ensuring compatibility with conventional male connectors.
  • a first male connector of the present invention comprises a cylindrical male member in which a flow path is formed, an outer cylinder surrounding the male member, and an inner surface of the outer cylinder facing the male member. and a female thread spirally formed from the outer cylinder toward the proximal end of the outer cylinder.
  • the thread groove of the female screw is composed of a bottom portion and a pair of flanks that face each other in the axial direction of the male connector with the bottom portion therebetween.
  • the female thread is incompletely displaced near the terminal end of the thread groove on the base end side of the outer cylinder so that the bottom of the thread groove approaches the shaft of the male connector as the terminal approaches the terminal end. It has a screw part.
  • a second male connector of the present invention comprises a cylindrical male member in which a flow path is formed, an outer cylinder surrounding the male member, and an inner surface of the outer cylinder facing the male member. and a flange that connects the proximal end of the male member and the proximal end of the outer cylinder.
  • the female thread has a fully threaded portion having a constant thread groove depth, and a fully threaded portion that is continuous with the fully threaded portion on the proximal end side of the outer cylinder and has a thread groove depth on the proximal end side of the outer cylinder. and an incompletely threaded portion that becomes shallower as it approaches the end of the groove.
  • the thread groove in the fully threaded portion includes a bottom portion, a pair of flanks facing in the axial direction of the male connector across the bottom portion, and a corner portion of an arc-shaped cross section connecting the bottom portion and the pair of flanks.
  • the thread groove in the incomplete thread consists of an arcuate cross-section smoothly connected to the flange. The radius of curvature of the arcuate cross-section of the incomplete threaded portion is greater than the radius of curvature of the corner of the fully threaded portion.
  • the male connector of the present invention is easy to clean.
  • the incomplete threaded portion does not affect the connection of the male connector of the present invention to the female connector. Therefore, the male connector of the present invention has compatibility with conventional male connectors in connection with female connectors.
  • FIG. 1A is a perspective view of a male connector according to Embodiment 1 of the present invention
  • FIG. 1B is a cross-sectional perspective view of the male connector
  • FIG. 2 is a plan view of the male connector according to Embodiment 1 of the present invention with the male member omitted.
  • 3A to 3F are cross-sectional views taken along planes including lines 3A-3A to 3F-3F in FIG.
  • FIG. 4 is an enlarged cross-sectional view of FIG. 3B.
  • FIG. 5 is a plan view of a conventional male connector with the male member omitted.
  • 6A to 6F are cross-sectional views taken along planes including lines 6A-6A to 6F-6F in FIG.
  • FIG. 7 is an enlarged cross-sectional view of FIG. 6B.
  • FIG. 8 is a plan view of a male connector according to Embodiment 2 of the present invention in which a male member is omitted.
  • 9A to 9F are cross-sectional views taken along planes including lines 9A-9A to 9F-9F in FIG.
  • FIG. 10 is an enlarged cross-sectional view of FIG. 9B.
  • FIG. 11 is a plan view of a male connector according to Embodiment 3 of the present invention in which a male member is omitted; 12A to 12F are cross-sectional views taken along planes including lines 12A-12A to 12F-12F in FIG.
  • FIG. 13 is an enlarged cross-sectional view of FIG. 12B.
  • FIG. 14 is a plan view of a male connector according to Embodiment 4 of the present invention in which a male member is omitted; 15A to 15F are cross-sectional views taken along a plane including lines 15A-15A to 15F-15F in FIG.
  • FIG. 16 is an enlarged cross-sectional view of FIG. 15C.
  • 17 is a cross-sectional view of a male connector according to Embodiment 5 of the present invention.
  • FIG. FIG. 18A is a perspective view of a conventional male connector.
  • FIG. 18B is a cross-sectional view along a plane containing the axis of the male connector.
  • FIG. 19A is a perspective view of a conventional female connector.
  • FIG. 19B is a cross-sectional view along a plane including the axis of the female connector.
  • the first male connector of the present invention described above may further include a flange that connects the proximal end of the male member and the proximal end of the outer cylinder.
  • the flange may not be connected to the flank of the pair of flanks on the distal end side of the outer cylinder. According to this aspect, a narrow and deep groove is not reliably formed in the vicinity of the terminal end of the thread groove. This is advantageous in facilitating cleaning of the male connector.
  • the female thread has a fully threaded portion at a constant distance from the axis of the bottom portion on the distal end side of the outer cylinder from the incompletely threaded portion. , may further be provided continuously with the incompletely threaded portion.
  • a width of the thread groove in the incomplete thread portion may be wider than a width of the bottom portion in the complete thread portion. According to this aspect, a narrow and deep groove is not reliably formed in the vicinity of the terminal end of the thread groove. This is advantageous in facilitating cleaning of the male connector.
  • the incompletely threaded portion may be formed with a first corner having an arc-shaped cross section so as to be continuous with the bottom portion.
  • a curvature radius of the first corner may be 0.6 mm or more.
  • the first corner is preferably formed on the base end side (flange side) of the outer cylinder with respect to the bottom part, and more preferably, the base end side (flange side) of the outer cylinder with respect to the bottom part and the distal end of the outer cylinder. formed on both sides.
  • the female thread has a fully threaded portion at a constant distance from the axis of the bottom portion on the distal end side of the outer cylinder from the incompletely threaded portion. , may further be provided continuously with the incompletely threaded portion.
  • a second corner portion having an arc-shaped cross section may be formed in the fully threaded portion so as to be continuous with the bottom portion.
  • a curvature radius of the second corner may be 0.6 mm or more. Such an aspect is advantageous in facilitating cleaning of the full thread.
  • the second corner is preferably formed on either one of the proximal end side (flange side) of the outer cylinder and the distal end side of the outer cylinder with respect to the bottom, and more preferably formed on both sides.
  • the female thread has a fully threaded portion at a constant distance from the axis of the bottom portion on the distal end side of the outer cylinder from the incompletely threaded portion. , may further be provided continuously with the incompletely threaded portion.
  • a first corner portion having an arc-shaped cross section may be formed so as to be continuous with the bottom portion.
  • a second corner portion having an arc-shaped cross section may be formed in the fully threaded portion so as to be continuous with the bottom portion.
  • the radius of curvature of the first corner may be greater than the radius of curvature of the second corner.
  • the first corner having a relatively large radius of curvature is preferably formed on the proximal side (flange side) of the outer cylinder with respect to the bottom, more preferably on the proximal side of the outer cylinder with respect to the bottom ( flange side) and the tip side of the outer cylinder.
  • the radius of curvature of the arc-shaped cross section of the incompletely threaded portion may be 0.6 mm or more. Such an aspect is advantageous in facilitating cleaning of incomplete threads.
  • the arcuate cross-section of the incompletely threaded portion may connect the flange and the top of the female thread.
  • the thread groove of the incompletely threaded portion is substantially defined by the arcuate cross section. This is advantageous in facilitating cleaning of imperfect threads.
  • the radius of curvature of the arcuate cross-section of the incomplete threaded portion may be constant over the entire length of the incompletely threaded portion. Such an aspect is advantageous for simplifying the configuration of the incompletely threaded portion.
  • the male connector may include a flange that connects the proximal end of the male member and the proximal end of the outer cylinder.
  • a third corner having an arcuate cross-section having a curvature radius of 0.6 mm or more may be formed between the proximal end of the male member and the flange.
  • the "axis" of a member means the central axis of the member.
  • An “axis” passes through the center of a circle contained in the member and/or coincides with the central axis of a cylinder or cone (taper) contained in the member.
  • a direction along a straight line perpendicular to the axis is called a “radial direction”.
  • the side closer to the axis is called the “inner” side
  • the side farther from the axis is called the "outer” side.
  • the direction of rotation around the axis is called the "circumferential direction”.
  • cross section means a cross section along a plane including the axis of a member, unless otherwise specified.
  • the "arcuate cross section” means that the shape of the cross section along the plane including the axis of the male connector is an arc.
  • the “corner with an arc-shaped cross section” means that the surface of the corner is configured with a curved surface that forms an arc in a cross section along a plane including the axis of the male connector.
  • “Radius of curvature” means the radius of curvature of a circular arc in a cross-section along a plane containing the axis of the male connector.
  • FIG. 1A is a top perspective view of a male connector 1 according to Embodiment 1 of the present invention.
  • FIG. 1B is a cross-sectional perspective view along a plane including the axis 1a of the male connector 1.
  • FIG. 1A is a top perspective view of a male connector 1 according to Embodiment 1 of the present invention.
  • FIG. 1B is a cross-sectional perspective view along a plane including the axis 1a of the male connector 1.
  • FIG. 1A is a top perspective view of a male connector 1 according to Embodiment 1 of the present invention.
  • FIG. 1B is a cross-sectional perspective view along a plane including the axis 1a of the male connector 1.
  • the male connector 1 has a cylindrical male member 11 at one end and a connection tube 21 at the other end, which are arranged coaxially with the shaft 1a.
  • a flow path 19 passes through the male connector 1 from the male member 11 to the connecting tube 21 along the axis 1a.
  • An outer cylinder 15 surrounds the male member 11 .
  • the male member 11 has an elongated rod shape.
  • a male taper surface 12 is provided on the outer peripheral surface of the male member 11 so that the outer diameter of the male member 11 decreases toward the tip of the male member 11 .
  • the male member 11 has a tip tapered surface 13 having a larger taper angle than the male taper surface 12 on the tip side of the male taper surface 12 .
  • the tip of the male member 11 (a part or the whole of the tapered surface 13 at the tip) protrudes from the tip of the outer cylinder 15 in the direction of the axis 1a. Protruding the male member 11 from the outer cylinder 15 is advantageous in facilitating connection of the male connector 1 to the female connector 920 (see FIGS. 19A and 19B).
  • a flange 18 protrudes radially outward from the proximal end of the male member 11 .
  • the outer cylinder 15 extends from the circular outer edge of the flange 18 toward the same side as the male member 11 (toward the distal end of the male connector 1).
  • the outer cylinder 15 has a substantially cylindrical shape and is arranged coaxially with the male member 11 .
  • the outer cylinder 15 is radially separated from the male member 11 with a gap 14 therebetween.
  • a female thread 16 is provided on the inner peripheral surface of the outer cylinder 15 facing the male member 11 .
  • the connection tube 21 has a hollow tubular shape and communicates with the male member 11 .
  • a grip portion 23 is provided integrally with the connection tube 21 so as to surround the connection tube 21 .
  • the grip portion 23 has a substantially quadrangular prism shape with a substantially rectangular cross-sectional shape along a plane perpendicular to the axis 1a.
  • the grip portion 23 makes it easy for the operator to apply rotational force to the male connector 1 around the axis 1a.
  • the shape of the grip portion 23 is arbitrary.
  • the grip portion 23 may have a thin plate shape along a plane including the axis 1a.
  • the male connector 1 may not have the grip portion 23 .
  • a flexible hollow tube 29 is led out from the connecting tube 21 .
  • the tube 29 is inserted into the connection tube 21 and fixed to the connection tube 21 with an adhesive or the like.
  • the channel 19 of the male connector 1 communicates with the lumen of the tube 29 .
  • Tube 29 may be a nasal catheter inserted through the patient's nasal cavity and into the stomach or esophagus.
  • tube 29 may be a tube (extension tube) connected to a nasal catheter.
  • the male connector 1 can be integrally formed as a single part using a hard material.
  • the hard material preferably has mechanical strength (rigidity) to the extent that it is not substantially deformed by an external force.
  • resin materials such as polypropylene, acrylonitrile-butadiene-styrene copolymer, polycarbonate, polyacetal, polystyrene, polyamide, polyethylene, and rigid polyvinyl chloride can be used as hard materials.
  • the male connector 1 may be configured by combining a plurality of separately manufactured parts (for example, two parts, ie, the outer cylinder 15 and the part other than the outer cylinder 15). In this case, the materials forming the plurality of parts may be the same or different, and each can be selected from the hard materials described above.
  • the male connector 1 is compatible with the conventional male connector 910 shown in FIGS. 18A and 18B. Therefore, the male connector 1 can be repeatedly connected and disconnected from the female connector 920 of FIGS. 19A and 19B. That is, the male connector 1 can be connected to the female connector 920 by inserting the male member 11 into the female member 921 and screwing the female screw 16 into the threaded projection 926 . Since the male taper surface 12 of the male member 11 and the female taper surface 922 of the female member 921 have the same diameter and taper angle, they are liquid-tightly taper-fitted.
  • the male connector 1 of Embodiment 1 differs from the conventional male connector 910 (see FIGS. 18A and 18B) with respect to the female screw 16. This is explained below.
  • FIG. 2 is a plan view of the male connector 1 of Embodiment 1 as seen from the distal end side.
  • the male member 11 and the flow path 19 are omitted.
  • 3A to 3F are cross-sectional views of the male connector 1 taken along cross-sections 3A-3A to 3F-3F in FIG. 2.
  • FIG. Sections 3A-3A to 3F-3F include the axis 1a of the male connector 1 and are rotated clockwise about the axis 1a by 30 degrees.
  • 3A to 3F show only the portion of the male connector 1 above the flange 18.
  • FIG. 3A to 3F, male member 11 and channel 19 are omitted so that the shape of female thread 16 can be seen.
  • a female screw 16 is provided on the inner peripheral surface of the outer cylinder 15 .
  • the female screw 16 spirally continuously extends from the tip of the outer cylinder 15 (the upper end of the outer cylinder 15 in FIGS. 3A to 3F) toward the base end of the outer cylinder 15 (the end on the side of the flange 18).
  • the female thread 16 includes thread grooves and thread ridges alternately arranged in the direction of the axis 1a in a cross section along a plane including the axis 1a of the male connector 1 .
  • the end on the distal end side of the outer cylinder 15 is called the "starting end” of the thread groove
  • the end on the proximal end side of the outer cylinder 15 is called the “terminal end” 59 of the thread groove.
  • the terminal end 59 of the thread groove means the point where the thread groove disappears.
  • the female thread 16 is a double thread. Accordingly, the female thread 16 includes two helical thread grooves (or two thread threads), which are adjacent to each other in the direction of the axis 1a.
  • the female thread 16 has two-fold rotational symmetry with respect to the axis 1a (that is, when the female thread 16 is rotated 180 degrees around the axis 1a, it matches the female thread 16 before rotation).
  • the female thread 16 is not limited to a double thread, and may be a single thread or a multiple thread of three or more threads.
  • the female screw 16 has a completely threaded portion 52 arranged on the distal end side of the outer cylinder 15 and an incompletely threaded portion 51 arranged on the proximal end side of the outer cylinder 15 .
  • Fully threaded portion 52 constitutes the majority of female thread 16 and includes the beginning of female thread 16 .
  • the incomplete threaded portion 51 is continuous with the fully threaded portion 52 on the base end side of the outer cylinder 15 and includes the terminal end 59 of the female thread 16 .
  • the completely threaded portion 52 and the incompletely threaded portion 51 differ in cross-sectional shape of the thread groove of the female thread 16 .
  • FIG. 3A to 3F show a fully threaded portion 52 and an incompletely threaded portion 51 for one of the two thread grooves forming the female thread 16.
  • FIG. The cross-section of FIG. 3A passes through the boundary between fully threaded portion 52 and partially threaded portion 51 .
  • FIG. 4 is a cross-sectional view of the male connector 1 in which FIG. 3B is enlarged.
  • the female thread 16 of the fully threaded portion 52 has a radially outermost bottom portion 53, a radially innermost top portion 54, and the adjacent bottom portion 53 and top portion 54. Connecting flanks 55a, 55b are provided.
  • the bottom portion 53 and the top portion 54 include straight lines parallel to the axis 1a in a cross section including the axis 1a.
  • the “root diameter” of internal thread 16 is defined by bottom portion 53 .
  • the “inner diameter” of internal thread 16 is defined by crest 54 .
  • the flank (first flank) 55 a is arranged on the base end side (flange 18 side) with respect to the bottom portion 53
  • the flank (second flank) 55 b is arranged on the distal end side with respect to the bottom portion 53
  • the flanks 55a and 55b face each other in the direction of the axis 1a with the bottom portion 53 interposed therebetween.
  • a corner portion 69a having an arcuate cross section is formed between the bottom portion 53 and the flank 55a
  • a corner portion 69b having an arcuate cross section is formed between the bottom portion 53 and the flank 55b.
  • the corners 69a, 69b smoothly connect the bottom 53 and the flanks 55a, 55b.
  • Both corner 69a and corner 69b have a radius of curvature R9.
  • the curvature radius R9 is not limited, it is preferably 0.3 mm or less, more preferably 0.2 mm or less.
  • the thread groove of the female screw 16 is composed of a bottom portion 53, corner portions 69a and 69b smoothly connected to the bottom portion 53, and flanks 55a and 55b smoothly connected to the corner portions 69a and 69b. It has a trapezoidal cross-sectional shape.
  • the screw grooves are arranged at a constant pitch in the direction of the axis 1a via the top portion 54. As shown in FIG.
  • the flanks 55a and 55b function as screw surfaces and are represented as straight lines of the same length in a cross section including the axis 1a.
  • flanks 55a and 55b are inclined with respect to a straight line (that is, radial direction) perpendicular to the axis 1a, and the absolute values of the angles (flank angles) of the flanks 55a and 55b with respect to the straight line are the same.
  • the "length of the flank” means the length of the straight flank in the cross section containing the axis 1a.
  • the "width of the thread groove” means the dimension of the thread groove in the direction of the axis 1a at the position closest to the axis 1a.
  • the "width of the thread groove” substantially coincides with the interval in the direction of the axis 1a between the top portions 54 adjacent to each other in the direction of the axis 1a across the thread groove.
  • “Thread groove depth” means the distance along the radial direction between the deepest portion of the thread groove (the farthest point from the shaft 1a) and the top portion 54. As shown in FIG. The cross-sectional shape of the thread groove and the dimensions of each portion of the thread groove, including width and depth, are constant over the entire length of the thread groove in the fully threaded portion 52 .
  • the thread groove extends continuously from the fully threaded portion 52 to the incompletely threaded portion 51 .
  • the bottom portion 53 is radially displaced closer to the axis of the male connector 1 as it approaches the terminal end 59 of the thread groove.
  • the thread groove of the female thread 16 gradually becomes shallower as it approaches the terminal end 59 .
  • the bottom 53 reaches the same radial position as the top 54 and the thread disappears.
  • a portion of the female screw 16 where the bottom portion 53 of the thread groove is displaced in the radial direction (or a portion where the depth of the thread groove changes) is the incomplete thread portion 51 .
  • the flanks 55a and 55b become shorter as the bottom portion 53 is radially displaced closer to the axis of the male connector 1 as the terminal end 59 is approached.
  • corners 69a and 69b of arcuate cross-sections having a radius of curvature R9 smoothly connect the bottom portion 53 and the flanks 55a and 55b.
  • the flange 18 is connected to the flank 55a of the incomplete threaded portion 51 (see FIG. 3A). Proximal to the thread, there is no apex 54, particularly an apex 54 having the same inner diameter as the apex 54 of the fully threaded portion 52. As the terminal end 59 is approached, the flank 55a is gradually shortened. Shortly before the terminal end 59, the flank 55a may substantially disappear and the flange 18 may be connected to the bottom 53 via a corner 69a (see FIG. 4).
  • FIG. 5 is a plan view of the male connector 910 viewed from the distal end side.
  • the male member 911 and the flow path 919 are omitted to simplify the drawing.
  • 6A-6F are cross-sectional views of male connector 910 taken along cross-sections 6A-6A-6F-6F of FIG.
  • Sections 6A-6A through 6F-6F include axis 910a of male connector 910 and are rotated clockwise about axis 910a in 30 degree increments.
  • Sections 6A-6A through 6F-6F of FIG. 5 correspond in turn to sections 3A-3A through 3F-3F of FIG. 6A-6F show only the portion of the male connector 910 above the flange 918.
  • FIG. 6A to 6F, male member 911 and channel 919 are omitted so that the shape of female thread 916 can be seen.
  • FIG. 7 is a cross-sectional view of the male connector 910 enlarging FIG. 6B.
  • the female thread 916 comprises a fully threaded portion 952 and a partially threaded portion 951 .
  • the fully threaded portion 952 is the same as the fully threaded portion 52 of the first embodiment.
  • the female thread 916 differs from the female thread 16 of the first embodiment with respect to the incomplete thread portion 951 . This is explained below.
  • FIG. 6A Similar to FIG. 3A, the cross section of FIG. 6A passes through the boundary between the fully threaded portion 952 and the incompletely threaded portion 951 of one of the two thread grooves forming the double thread.
  • flange 918 is connected to flank 55a.
  • FIG. 6B flange 918 is connected to corner 69a.
  • FIG. 6C flange 918 is connected to bottom 53 .
  • FIG. 6D flange 918 is connected to flank 55b.
  • the flange 918 includes a flank 55a (see FIG. 6A), a corner 69a (see FIG. 6B), a bottom 53 (see FIG.
  • the corner 69b is connected in turn to the flank 55b (see FIG. 6D). After that, the flank 55b is gradually shortened. Then, at the terminal end 59 of the internal thread 916, the flank 55b disappears, the flange 918 is connected to the top portion 54, and the thread groove disappears.
  • the top portion 54 of the female thread 916 approaches the flange 918 and the width of the thread groove narrows. Then, at the terminal end 59, the top 54 is connected to the flange 918, the width of the thread becomes zero, and the thread disappears.
  • the distance from the axis of the bottom portion 53 of the thread groove (or the depth of the thread groove) remains unchanged as long as the bottom portion 53 exists (see FIGS. 6A-6C). At the portion where the bottom portion 53 disappears and the flange 918 is connected to the flank 55b, the thread groove gradually becomes shallower toward the terminal end 59 (see FIG.
  • the incompletely threaded portion 951 has a narrow and deep thread groove (hereinafter referred to as a “narrow and deep groove”) 957 near the terminal end 59 (or the flange 918) (see FIGS. 6C and 6D). If liquid adheres to the narrow and deep groove 957 of the incompletely threaded portion 951 by performing enteral feeding using the male connector 910, it can be washed with water as well as the cylindrical portion and the brush of Patent Document 1. Even if a cleaning tool is used, it is difficult to cleanly remove the liquid in the narrow and deep groove 957 .
  • the bottom portion 53 is displaced closer to the shaft 1a as the terminal end 59 is approached. Then, at the terminal end 59, the bottom 53 reaches the same radial position as the top 54 and the thread disappears.
  • the flange 18 may be connected to the bottom 53 but not to the distal flank 55b. Therefore, the width of the thread groove is wide until the end 59 (or flange 18).
  • the width of the thread groove at any position of the incompletely threaded portion 51 is wider than the width of the bottom portion 53 (dimension in the direction of the axis 1a) of the completely threaded portion 52 .
  • the incomplete threaded portion 51 does not have a narrow and deep threaded groove such as the narrow deep groove 957 (see FIGS. 6C and 6D) formed in the incompletely threaded portion 951 of the conventional male connector 910 . Therefore, even if a liquid adheres to the thread groove of the incompletely threaded portion 51 by performing enteral nutrition using the male connector 1, the liquid can be easily washed away by washing with water or the like. Further, when a cleaning tool such as the cylindrical portion or brush of Patent Document 1 is inserted into the gap 14, the cleaning tool easily enters the wide and shallow thread groove of the incomplete thread portion 51, thereby defining the thread groove.
  • the male connector 1 of Embodiment 1 is easy to clean, which is advantageous for maintaining good sanitary conditions.
  • the incomplete threaded portion 51 does not participate in screwing with the screw-like protrusion 926 of the female connector 920 (see FIGS. 19A and 19B), like the incompletely threaded portion 951 of the conventional male connector 910 . Even if the radial position of the bottom portion 53 is closer to the shaft 1a than the fully threaded portion 52 in the incompletely threaded portion 51, this does not affect the connection of the male connector 1 to the female connector 920 at all. Therefore, the male connector 1 has compatibility with the conventional male connector 910 in connection with the female connector 920 .
  • the second embodiment differs from the first embodiment with respect to the incomplete threaded portion 51 .
  • the second embodiment will be described, focusing on the differences from the first embodiment.
  • FIG. 8 is a plan view of the male connector 2 as seen from the tip side.
  • the male member 11 and the flow path 19 are omitted in FIG. 9A to 9F are cross-sectional views of the male connector 2 taken along cross-sections 9A-9A to 9F-9F in FIG. 8.
  • FIG. Sections 9A-9A to 9F-9F include the axis 1a of the male connector 2 and are rotated clockwise about the axis 1a by 30 degrees. 9A to 9F show only the portion of the male connector 2 above the flange 18.
  • male member 11 and channel 19 are omitted so that the shape of female screw 16 can be seen.
  • the bottom portion 53 is displaced so as to approach the shaft 1a of the male connector 2 as the terminal end 59 is approached.
  • FIG. 10 is an enlarged sectional view of FIG. 9B.
  • the incompletely threaded portion 51 is formed with a corner portion 61a having an arcuate cross-section having a relatively large radius of curvature R1 between the bottom portion 53 and the flange 18.
  • the corner portion 61a connects the bottom portion 53 and the flange 18 smoothly.
  • the radius of curvature R1 is not limited, it is preferably 0.6 mm or more, more preferably 0.8 mm or more.
  • the upper limit of the radius of curvature R1 is not limited, it is preferably equal to or less than the depth of the thread groove in the fully threaded portion 52 of the female thread 16, and more preferably equal to or less than 1/2 of the depth.
  • the corner portion 61a having the radius of curvature R1 is formed continuously over the entire length of the incomplete thread portion 51.
  • FIGS. Furthermore, in the region beyond the terminal end 59 of the thread groove, there is provided between the apex 54 and the flange 18 corners of an arcuate cross-section having a relatively large radius of curvature so as to connect the apex 54 and the flange 18 smoothly.
  • a portion 67 is formed (see FIGS. 9C and 9D).
  • the radius of curvature of the corner 67 is not limited, it is preferably 0.6 mm or more, more preferably 0.8 mm or more, and can be set to be the same as the radius of curvature R1, for example.
  • the incompletely threaded portion 51 has a corner portion 61 a having an arc-shaped cross-section with a relatively large radius of curvature R ⁇ b>1 and is formed so as to be continuous with the bottom portion 53 . Even if a liquid adheres to the corner 61a by performing enteral nutrition using the male connector 2, the liquid can be easily washed away by washing with water or the like. Further, when a cleaning tool such as a tubular portion or a brush of Patent Document 1 is inserted into the gap 14, the cleaning tool is easily deformed so as to adhere to the surface of the corner 61a, and the surface of the corner 61a is deformed. is slidable. The corner 61a can be cleanly cleaned using a cleaning tool. Therefore, the male connector 2 of the second embodiment is easier to clean than the male connector 1 of the first embodiment, which is advantageous in maintaining good sanitary conditions.
  • a cleaning tool such as a tubular portion or a brush of Patent Document 1
  • the incompletely threaded portion 51 is provided between the bottom portion 53 and the flank 55b with a corner portion 69b having an arcuate cross-section having a relatively small radius of curvature R9 similar to that of the first embodiment. (See FIG. 10).
  • the present invention is not limited to this.
  • a corner portion having a circular arc cross section having a relatively large radius of curvature R1 may be provided. .
  • the fully threaded portion 52 of the second embodiment is the same as the fully threaded portion 52 of the first embodiment. That is, in the fully threaded portion 52, corner portions 69a and 69b having an arc-shaped cross section with a relatively small radius of curvature R9 are provided so as to be continuous with the bottom portion 53 (see FIG. 10). This reduces the possibility that the threaded projections 926 of the female connector 920 will collide with the corners 69a, 69b of the fully threaded portion 52 when the male connector 2 is connected to the female connector 920 (FIGS. 19A and 19B).
  • the fully threaded portion 52 is relatively easy to clean as compared to the incompletely threaded portion 51, the fully threaded portion 52 is provided with corners 69a and 69b of arcuate cross section having a relatively small radius of curvature R9. However, the possibility that the thread groove of the fully threaded portion 52 is unsanitary is low.
  • the incomplete threaded portion 51 has substantially no flank 55a (see FIG. 7), and the corner 61a connects the bottom portion 53 and the flange 18 smoothly. It is not limited to this.
  • the flange 18 is connected to the flank 55a in the same manner as in the first embodiment.
  • a corner portion 61a with an arcuate cross-section having a large radius of curvature R1 may be provided.
  • Embodiment 2 is the same as Embodiment 1 except for the above.
  • the description of Embodiment 1 applies to this Embodiment 2 as well.
  • the third embodiment differs from the first embodiment with respect to the completely threaded portion 52 and the incompletely threaded portion 51 .
  • the third embodiment will be described, focusing on the differences from the first embodiment.
  • FIG. 11 is a plan view of the male connector 3 as seen from the tip side.
  • the male member 11 and the flow path 19 are omitted in FIG. 12A to 12F are cross-sectional views of the male connector 3 taken along cross-sections 12A-12A to 12F-12F in FIG. 11.
  • FIG. Sections 12A-12A to 12F-12F include axis 1a of male connector 3 and are rotated clockwise about axis 1a by 30 degrees. 12A to 12F show only the portion of the male connector 3 above the flange 18.
  • FIG. 11 is a plan view of the male connector 3 as seen from the tip side.
  • the male member 11 and the flow path 19 are omitted in FIG. 12A to 12F are cross-sectional views of the male connector 3 taken along cross-sections 12A-12A to 12F-12F in FIG. 11.
  • FIG. Sections 12A-12A to 12F-12F include axis 1a of male connector 3 and are rotated clockwise about axis 1a by 30 degrees. 12A to 12
  • male member 11 and channel 19 are omitted so that the shape of female screw 16 can be seen.
  • the bottom portion 53 is displaced so as to approach the shaft 1a of the male connector 3 as the terminal end 59 is approached.
  • FIG. 13 is a cross-sectional view of the male connector 3 in which FIG. 12B is enlarged.
  • the third embodiment instead of the corners 69a and 69b (see FIG. 4) having a relatively small radius of curvature R9 of the first embodiment, corners 61a and 61b having a relatively large radius of curvature R1 are internally threaded. It is provided over the entire length of 16 screw grooves.
  • the radius of curvature R1 is not limited, it is preferably 0.6 mm or more, more preferably 0.8 mm or more.
  • the upper limit of the radius of curvature R1 is not limited, it is preferably equal to or less than the depth of the thread groove in the fully threaded portion 52 of the female thread 16, and more preferably equal to or less than 1/2 of the depth.
  • the radius of curvature R1 is set so that the corners 69a and 69b of the fully threaded portion 52 do not collide with the screw-like protrusions 926 of the female connector 920 when the male connector 1 is connected to the female connector 920 (see FIGS. 19A and 19B). set.
  • the corner portion 61a having the radius of curvature R1 is provided only on the flange 18 (base end) side with respect to the bottom portion 53 in the incompletely threaded portion 51 (see FIG. 10).
  • the corners 61a and 61b having the radius of curvature R1 are located on the flange 18 (base end) side and the distal end side with respect to the bottom portion 53 in the incompletely threaded portion 51 and the completely threaded portion 52. provided in both.
  • the arc-shaped cross-sectional corner 61b having a relatively large curvature radius R1 smoothly connects the bottom 53 and the flank 55b over the entire length of the thread groove of the female screw 16.
  • a corner portion 61a of an arcuate cross-section having a relatively large radius of curvature R1 smoothly connects the bottom portion 53 and the flange 18 (or the flank 55a) of the incompletely threaded portion 51, and connects the bottom portion 53 of the fully threaded portion 52 with the corner portion 61a. It connects smoothly with the flank 55a.
  • the corners 61a and 61b of the arc-shaped cross section having a relatively large radius of curvature R1 are formed so as to be continuous with the bottom 53 over the entire length of the thread groove of the female thread 16.
  • the liquid can be easily washed away by washing with water or the like.
  • a cleaning tool such as a cylindrical portion or a brush of Patent Document 1
  • the cleaning tool is easily deformed so as to be in close contact with the surfaces of the corners 61a and 61b. It is slidable on the surface of 61b.
  • the corners 61a and 61b can be cleanly cleaned using a cleaning tool. Therefore, the male connector 3 of Embodiment 3 is easier to clean than the male connectors 1 and 2 of Embodiments 1 and 2, which is advantageous in maintaining good sanitary conditions.
  • Embodiment 3 is the same as Embodiments 1 and 2 except for the above.
  • the descriptions of the first and second embodiments are similarly applied to the third embodiment.
  • the fourth embodiment differs from the first embodiment with respect to the incomplete screw portion 51 .
  • the fourth embodiment will be described, focusing on the differences from the first embodiment.
  • FIG. 14 is a plan view of the male connector 4 as seen from the tip side.
  • the male member 11 and the flow path 19 are omitted in FIG. 15A-15F are cross-sectional views of the male connector 4 taken along the cross-sections 15A-15A-15F-15F of FIG.
  • Sections 15A-15A to 15F-15F include axis 1a of male connector 4 and are rotated clockwise about axis 1a by 30 degrees.
  • 15A to 15F show only the portion of the male connector 4 above the flange 18.
  • FIG. 15A to 15F, male member 11 and channel 19 are omitted so that the shape of female thread 16 can be seen.
  • FIG. 16 is a cross-sectional view of the male connector 4 in which FIG. 15C is enlarged.
  • flanks 55a and 55b having a straight cross-section are not substantially formed in the incomplete thread portion 51.
  • the thread groove of the incomplete threaded portion 51 is composed of an arcuate cross section 63 smoothly connected to the flange 18 .
  • the radius of curvature R3 of the arcuate section 63 is greater than the radius of curvature R9 of the corners 69a and 69b of the fully threaded portion 52.
  • the curvature radius R3 is 0.6 mm or more, preferably 0.8 mm or more.
  • the upper limit of the radius of curvature R3 is not limited, it is preferably equal to or less than the depth of the thread groove in the fully threaded portion 52 of the female thread 16 .
  • the arcuate cross section 63 is continuously provided over the entire length of the incomplete threaded portion 51 .
  • the radius of curvature R3 may vary over the length of the incomplete threaded portion 51, but is preferably constant.
  • a circular cross section 63 defines the deepest portion of the thread groove in the incomplete thread portion 51 .
  • An arcuate cross-section 63 connects flange 18 and top 54 .
  • the incomplete threaded portion 51 is the portion of the female thread 16 in which the depth of the thread groove changes so as to become shallower as it approaches the terminal end 59 .
  • the thread groove of the incomplete threaded portion 51 is formed by an arcuate cross section 63 having a radius of curvature R3 larger than the radius of curvature R9 of the corners 69a and 69b of the fully threaded portion 52.
  • the arc-shaped cross-section 63 is displaced so as to approach the axis of the male connector 4 as it approaches the terminal end 59 . Then, at the terminal end 59, the thread groove disappears.
  • the width of the thread groove becomes narrower as it approaches the terminal end 59, but the thread groove becomes shallower at the same time. Therefore, the incompletely threaded portion 51 does not have a narrow and deep threaded groove like the narrow deep groove 957 (see FIGS.
  • the incomplete threaded portion 51 does not participate in screwing with the screw-like protrusion 926 of the female connector 920 (see FIGS. 19A and 19B), like the incompletely threaded portion 951 of the conventional male connector 910 . Even if the thread groove of the incompletely threaded portion 51 is composed of an arc-shaped cross section 63 having a relatively large radius of curvature R3 and the thread groove becomes shallower as it approaches the terminal end 59, this is true of the male connector 4. There is no effect on the connection to female connector 920 . Therefore, the male connector 4 has compatibility with the conventional male connector 910 in connection with the female connector 920 .
  • Embodiment 4 is the same as Embodiment 1 except for the above.
  • the description of Embodiment 1 applies to this Embodiment 4 as well.
  • the thread grooves of the fully threaded portion 52 are provided with the corners 61a and 61b of the arc-shaped cross section having the relatively large radius of curvature R1 described in the third embodiment. may have. In this case, the same effects as in the third embodiment are obtained.
  • FIG. 17 is a cross-sectional view of a male connector 5 according to Embodiment 5 of the present invention.
  • the male connector 5 differs from that of the third embodiment in the shape of the proximal end portion of the male member 11 .
  • the fifth embodiment will be described, focusing on the differences from the third embodiment.
  • a corner portion 65 having an arc-shaped cross section with a relatively large radius of curvature R5 is formed between the proximal end of the male member 11 and the flange 18 .
  • the corner 65 smoothly connects the male member 11 and the flange 18 .
  • the curvature radius R5 is 0.6 mm or more, preferably 0.8 mm or more.
  • the upper limit of the radius of curvature R5 is not limited, it is preferably equal to or less than the pitch of the female thread 16, more preferably equal to or less than 1/2 of the pitch of the female thread 16, particularly equal to or less than 1/3.
  • the male member 11 and the flange 18 are smoothly connected by a corner portion 65 having a relatively large radius of curvature R5. Even if a liquid adheres to the corner 65 by performing enteral nutrition using the male connector 5, the liquid can be easily washed away by washing with water or the like. Further, when a cleaning tool such as a cylindrical portion or a brush of Patent Document 1 is inserted into the gap 14 , the cleaning tool is easily deformed so as to be in close contact with the surface of the corner 65 . is slidable. A cleaning tool can be used to clean the corner 65 neatly. Therefore, the male connector 5 of Embodiment 5 is easy to clean, which is advantageous for maintaining good sanitary conditions.
  • a cleaning tool such as a cylindrical portion or a brush of Patent Document 1
  • the fifth embodiment is the same as the third embodiment except for the above.
  • the description of Embodiment 3 applies to this Embodiment 5 as well.
  • the corner portion 65 of the fifth embodiment may be applied to the male connectors 1, 2 and 4 of the first, second and fourth embodiments. In this case, the same effects as in the fifth embodiment are obtained.
  • the flange 18 is a flat plate along the radial direction, but the present invention is not limited to this.
  • the flange 18 may substantially follow a conical surface coaxial with the axis of the male connector, more specifically, a conical surface that expands toward the distal end of the male connector (the side opposite to the connecting tube 21). may be approximately along the
  • a through-hole may be formed in the flange 18 and/or the outer cylinder 15 to allow communication between the gap 14 and the outside world (see Patent Document 2, for example).
  • the corners 61a, 61b, 65, 67, 69a, and 69b of Embodiments 1 to 5 above have arc-shaped cross sections, but the corners of the present invention are not limited to this.
  • the corners 61a, 61b, 65, 67, 69a, 69b have an inclined straight line (that is, a straight cross section) in a cross section along a plane containing the axis 1a. good.
  • the “slanted straight line” may be a straight line connecting both ends of the arc forming the arc-shaped cross section.
  • the length of the straight line forming the corner having the straight cross section can be varied according to the radius of curvature of the arc forming the corner having the circular arc cross section.
  • the male connector of the present invention may be used for uses other than enteral nutrition.
  • the present invention can be widely used as a male connector used in the medical field, especially for enteral nutrition.
  • it can be preferably used as a male connector provided at the upstream end of a catheter that is inserted into a patient and remains indwelled in the patient for a long period of time.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

Dans la présente invention, un élément mâle (11) est entouré par un cylindre externe (15). Une vis femelle (16) est formée sur la surface interne du cylindre externe (15). La rainure de filetage de la vis femelle (16) est constituée d'une partie inférieure (53) et d'une paire de flancs (55a, 55b). La vis femelle (16) présente, au voisinage de l'extrémité (59) de la rainure de filetage sur le côté d'extrémité de base du cylindre externe (15), une partie filetée incomplète (51) dans laquelle la partie inférieure (53) de la rainure filetée est déplacée de manière à s'approcher de l'axe (1a) d'un connecteur mâle (1) à l'approche de l'extrémité (59).
PCT/JP2021/039103 2021-01-22 2021-10-22 Raccord mâle WO2022158063A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10272183A (ja) * 1996-10-28 1998-10-13 Daikyo Seiko:Kk ルアーロック部を有する注射器
JP2009543662A (ja) * 2006-07-18 2009-12-10 マリンクロット インコーポレイテッド 耐破損性ルアー取付具
WO2017104689A1 (fr) * 2015-12-15 2017-06-22 株式会社ジェイ・エム・エス Connecteur femelle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10272183A (ja) * 1996-10-28 1998-10-13 Daikyo Seiko:Kk ルアーロック部を有する注射器
JP2009543662A (ja) * 2006-07-18 2009-12-10 マリンクロット インコーポレイテッド 耐破損性ルアー取付具
WO2017104689A1 (fr) * 2015-12-15 2017-06-22 株式会社ジェイ・エム・エス Connecteur femelle

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