CHANNEL CONNECTION DEVICE HAVING IMPROPER CONNECTION PREVENTING FUNCTION, NUTRIENT CONTAINER, AND LIQUID FEEDING CIRCUIT

摘要

PROBLEM TO BE SOLVED: To prevent a pair of connectors for connecting two channels from being improperly connected to a connector with an inappropriate structure.SOLUTION: A first connector 1 includes: a cap 3; a tubular pedestal 6 integrally provided with the cap and projecting to a distal end side; a tubular projection 8 projecting from the center at the distal end of the pedestal; and an engagement nail 9 projecting outward from part of the peripheral edge at the distal end of the pedestal. A second connector 2 includes: a tube coupling part 4; an inner tube 11 integrally formed with the tube coupling part, projecting to the distal end side and insertable into the tubular projection of the first connector; an outer tube 12 combined with the proximal end side of the inner tube to form an annular recess 13 which can be fitted with the tubular projection between the outer tube and the outer peripheral surface of the inner tube; and an engagement wall 5 coupled to the outer tube, extending toward the distal end side in the tube axial direction and projecting further than the distal end of the outer tube. The first connector and the second connector are connected to each other by fitting the tubular projection into the annular recess and engaging the engagement nail with the engagement wall.