Patent ID: 11872366
Assignee: KOYO SANGYO CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A  F | IPC A

Claim 0:
1. A connecting structure for medical use comprising:
a male assembly; and
a female connector of a cylindrical configuration,
the male assembly including a male connector of a cylindrical configuration and a threadedly engageable cylinder rotatably coupled to the male connector,
the male connector including a male luer portion and a support portion arranged in a direction from a distal end to a basal end thereof in this order,
the threadedly engageable cylinder including a threadedly engageable portion and a mounting portion arranged in a direction from a distal end to a basal end thereof in this order, the mounting portion rotatably mounted on an outer periphery of the support portion of the male connector, the threadedly engageable portion including a female screw in an inner periphery thereof, the threadedly engageable portion disposed outside of the male luer portion in a radial direction,
the female connector including a female luer portion and an engageable protrusion formed in an outer periphery of the female luer portion,
the male luer portion and the female luer portion joined by turning the threadedly engageable cylinder in a tightening direction in a state where the female screw of the threadedly engageable cylinder and the engageable protrusion of the female connector are threadedly engaged with each other,
the connecting structure further comprising an operation cylinder mounted on an outer periphery of the threadedly engageable cylinder and a torque limiting mechanism disposed between the threadedly engageable cylinder and the operation cylinder;
the torque limiting mechanism transmitting a rotary torque of the operation cylinder in a tightening direction to the threadedly engageable cylinder;
the torque limiting mechanism allowing the operation cylinder to be turned idly with respect to the threadedly engageable cylinder when the rotary torque exceeds a predetermined torque;
the torque limiting mechanism including engageable teeth formed in an inner periphery of one end portion of the operation cylinder in an axial direction over an entire periphery and at least one first engageable claw protruded outward in a radial direction from an outer surface of one end portion of the threadedly engageable cylinder in an axial direction, the first engageable claw engageable with the engageable teeth; wherein
at least one slit is formed in the one end portion of the threadedly engageable cylinder, the slit composed only of a straight portion extending in the axial direction from an end of the threadedly engageable cylinder;
at least one of two areas of the one end portion of the threadedly engageable cylinder adjacent to the slit in a circumferential direction is provided as an elastically deformable portion having a lower elastic coefficient than the other areas of the one end portion of the threadedly engageable cylinder;
the first engageable claw is formed in an outer surface of the elastically deformable portion; and
the elastically deformable portion is deformed inward in the radial direction when the operation cylinder is turned idly and the first engageable claw is moved over the engageable teeth.