Patent ID: 6854623

Claim:
A backflow preventive tube container comprising: a tube container main body for storing a fluid therein, said main body having a mouth portion for discharging the fluid, said main body being squeezable and having an elasticity-restoring function; a cylinder-shaped material fitted in the mouth portion, said cylinder-shaped material having at a bottom an opening through which the fluid passes; a valve body comprising a fitting portion configured to be liquid-tightly fitted in the opening, said valve body being movable in said cylinder-shaped material along its axis; and a support for limiting movement of the valve body away from the opening, wherein the cylinder-shaped material, the valve body, and the support are co-axially arranged, wherein the support (I) comprises bellows fixed to the cylinder-shaped material and attached to a top of the valve body inside the cylinder-shaped material, and/or (II) extends from a bottom of the valve body to the outside of the cylinder-shaped material and moves including its lower end in a direction in which the valve body moves, wherein when the main body is pressed by external force, the fluid pushes the valve body and is discharged through the opening, and when the external force is released, the pressure inside the main body becomes lower than the pressure outside the main body due to elasticity of the main body, thereby retracting the fluid at the opening and closing the valve body, said container further comprising a lid portion comprising a lid body and a lid base, wherein the lid base is attached to the mouth portion of the main body and fixes the cylinder-shaped material interposed between the lid base and the mouth portion, said lid base having a throughhole through which the fluid is discharged, said lid body closing the throughhole by press fitting to the lid base.