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JP-2026074518-A - Medical connection device

JP2026074518AJP 2026074518 AJP2026074518 AJP 2026074518AJP-2026074518-A

Abstract

[Problem] In a medical connection device with a torque limiting mechanism, the objective is to prevent the elastic piece from getting caught on gloves or the like, suppress the intrusion of dust, and simplify the configuration. [Solution] The male connector 10 has a male luer portion 11, a threaded portion 14 consisting of a female screw formed in a threaded cylinder portion 13, and a connecting portion 12 for connecting the tube 1. The female connector 20 has a female luer portion 21, a threaded portion 23 that functions as a male screw, and a connecting portion 22 for connecting the tube 2. The female connector 20 is provided with an operating member 30 and a torque limiting mechanism 100. The torque limiting mechanism 100 includes engaging teeth 35 formed around the entire circumference of the inner circumference of the engaging tooth forming cylinder portion 31 of the operating member 30, and an elastic piece 28 extending axially from the annular flange portion 25 in the female connector 20. The elastic piece 28 enters the annular space 40 between the engaging tooth forming cylinder portion 31 of the operating member 30 and the opposing circumferential surface 26 of the female connector 20, and has a claw portion 28a that engages with the engaging teeth 35 on its radially outward side. [Selection Diagram] Figure 4

Inventors

  • 宮崎 貴幸

Assignees

  • 光陽産業株式会社

Dates

Publication Date
20260507
Application Date
20241021

Claims (7)

  1. A first connector including a first connecting portion at the base end for connecting medical components, a first threaded portion at the tip end, and a first sealing portion, A second connector including a second connection portion at the base end for connecting other medical components, a second threaded portion at the tip end, and a second sealing portion, Equipped with, In a medical connection device in which the first and second threaded portions are joined together by screwing them, thereby connecting the medical components to each other, Furthermore, the device includes an operating member rotatably arranged on the outer circumference of the first connector, and a torque limiting mechanism provided between the first connector and the operating member. The operating member has an engagement tooth forming cylinder portion, and engagement teeth are formed around the entire inner circumference of the engagement tooth forming cylinder portion. In the first connector, the integrated portion that is integral with the first seal portion and the first screw portion has an opposing circumferential surface that faces radially opposite the engaging tooth forming cylindrical portion of the operating member via an annular space, a support projection adjacent to the opposing circumferential surface, and at least one elastic piece that extends axially from the support projection and enters the annular space, and a claw portion that engages with the engaging teeth is formed on the radially outer side of the elastic piece. The torque limit mechanism includes the engaging teeth and the elastic piece on which the claw portion is formed, and transmits the tightening torque of the operating member to the first screw portion via the engagement of the claw portion of the elastic piece and the engaging teeth, and when the tightening torque of the operating member exceeds a threshold torque, the elastic piece elastically deforms radially inward, thereby releasing the engagement of the engaging teeth and the claw portion, and the operating member spins freely.
  2. The medical connection device according to claim 1, characterized in that the support projection consists of an annular flange, and the annular flange closes the opening at one axial end of the annular space.
  3. The first connector is a female connector, and the female connector has a female luer portion whose inner surface is tapered as the first sealing portion, a first screw portion formed on the outer circumference of the tip of the female luer portion and functioning as a male screw, and a first connecting portion. The medical connection device according to claim 2, wherein the second connector is a male connector, and the male connector has a male luer portion having a tapered outer surface as the second sealing portion, a screw cylinder portion arranged radially outside the male luer portion, a second screw portion consisting of a female thread formed on the inner circumference of the screw cylinder portion, and the second connection portion.
  4. The operating member is positioned in the axial middle portion away from both axial ends of the female connector, and this middle portion includes the integrated portion. The medical connection device according to claim 3, characterized in that an annular shielding flange is formed at the end of the engaging tooth-forming cylindrical portion of the operating member opposite to the annular flange portion, projecting radially inward, and the shielding flange is rotatably supported on the outer circumference of the integrated portion of the female connector.
  5. The first connector is a male connector, and the male connector has a male luer portion having a tapered outer surface as the first sealing portion, a screw cylinder portion arranged radially outward from the male luer portion, a first screw portion consisting of a female thread formed on the inner circumference of the screw cylinder portion, and a first connecting portion. The medical connection device according to claim 2, characterized in that the second connector is a female connector, and the female connector has a female luer portion having a tapered inner surface as the second sealing portion, a second screw portion formed on the outer circumference of the tip of the female luer portion and functioning as a male screw, and a second connecting portion.
  6. The axial intermediate portion of the male connector includes the integrated portion which integrally connects the base end of the male luer portion and the base end of the screw cylinder portion. The medical connection device according to claim 5, wherein the operating member has a mounting cylinder portion rotatably supported on the outer circumference of the screw cylinder portion and an engagement tooth forming cylinder portion connected to the base end of the mounting cylinder portion, and the inner diameter of the engagement tooth forming cylinder portion is larger than the inner diameter of the mounting cylinder portion.
  7. The medical connection device according to claim 6, characterized in that the outer diameter of the mounting cylinder portion is smaller than that of the engaging tooth-forming cylinder portion, and a finger-grip portion is provided protruding from the outer circumference of the mounting cylinder portion.

Description

This invention relates to a medical connection device for connecting medical components. A medical connector for connecting medical components such as tubes comprises a male connector and a female connector. The male connector has a male Luer portion, a threaded cylinder portion located radially outside the male Luer portion, a threaded portion consisting of a female thread formed on the inner circumference of the threaded cylinder portion, and a connection portion for connecting medical components. The female connector has a female Luer portion, a threaded portion that functions as a male thread formed at the tip of the female Luer portion, and a connection portion for connecting other medical components. When the threaded portions of both connectors are screwed together, the male and female Luer portions are joined, and consequently, the two medical components connected to the connection portions of each connector are connected to each other. Patent documents 1 to 4 propose a structure that can prevent overtightening of the threaded portions of both connectors. A brief explanation follows. In many embodiments disclosed in Patent Document 1, a cylindrical operating member is rotatably provided on a male connector, and a torque limiting mechanism is positioned between this operating member and the male connector. The torque limiting mechanism has engaging teeth formed on the outer circumference of the male connector and an elastic piece formed on the operating member. A claw portion is formed on the radially inward side of the elastic piece, and this claw portion engages with the engaging teeth. When the operating member is rotated in the tightening direction, the operating torque applied to the operating member is transmitted to the threaded portion of the male connector via the engagement of the claw portion and the engaging teeth, causing the threaded portions of both connectors to screw together and the male luer portion and the female luer portion to join. When the operating torque in the tightening direction increases and reaches a threshold torque, the elastic piece of the operating member elastically deforms radially outward, releasing the engagement between the engaging teeth and the claw portion, and the operating member rotates freely. In this way, overtightening can be avoided. In the embodiment shown in Figures 19A to 21 of Patent Document 1, a cylindrical operating member is rotatably mounted on a female connector, and a torque limiting mechanism is positioned between this operating member and the female connector. The torque limiting mechanism has engaging teeth formed on the outer circumference of the female connector and an elastic piece formed on the operating member. Patent documents 2 to 4 describe a male connector having a connector body including a male luer portion and a threaded cylinder rotatably supported by the connector body, with a threaded portion consisting of a female thread formed on the inner circumference of the threaded cylinder. An operating member is arranged on the outer circumference of the threaded cylinder, and a torque limiting mechanism is arranged between the threaded cylinder and the operating member. The torque limiting mechanisms described in Patent Documents 2 to 4 differ from those in Patent Document 1 in that the arrangement of the engaging teeth and elastic piece is reversed, with the engaging teeth formed around the entire inner circumference of the operating member and the elastic piece formed in a screw-type cylinder. A claw portion is formed on the radially outer surface of the elastic piece. When the operating torque exceeds the threshold torque, the elastic piece elastically deforms radially inward, causing the operating member to spin freely. WO2016/157974WO2018/189842WO2020/070983WO2020/071024 This is a top view showing a female connector of a medical connection device according to the first embodiment of the present invention, the female connector being provided with an operating member and a torque limiting mechanism.This is a top view of the medical connection device, showing the female connector and operating member separated.This is a longitudinal cross-sectional view taken along the line A-A in Figure 2.This is a longitudinal cross-sectional view showing the male and female connectors of the medical connection device separated.This is a longitudinal cross-sectional view showing the state when the male and female connectors of the medical connection device are connected and the operating torque exceeds a threshold.This is a cross-sectional view taken along the line B-B in Figure 4.This is a cross-sectional view taken along the line C-C in Figure 5.This is a longitudinal cross-sectional view of a female connector of a medical connection device according to a second embodiment of the present invention.This is a longitudinal cross-sectional view of a medical connection device according to a third embodiment of the present invention, showing a sta