Needle disposal container

A needle disposal container for disposing of a first needle unit having a first needle hub and a second needle unit having a second needle hub with a smaller outer diameter than the first needle hub, comprising:

• a container body having an open top;
• and
• a covering attached to the container body, wherein:
• the covering includes a lid body that covers the open top of the container body and a movable member attached to the lid body so as to be movable relative to the lid body between a hold position and a retract position in a first direction;
• the lid body is formed with a first wall extending in a second direction perpendicular to the first direction, the first wall having a first surface with a concave-arc cross-section;
• the movable member is formed with a second wall extending in the second direction, the second wall having a second surface with a concave-arc cross-section, the second surface confronting the first surface of the first wall in the first direction;
• the first surface of the first wall and the second surface of the second wall together form a cylindrical surface that defines an insertion opening extending in the second direction, the insertion opening having a top side and a bottom side opposite to the top side in the second direction;
• when the movable member is moved from the hold position to the retract position, then the second wall of the movable member moves away from the first wall of the lid body to widen the insertion opening, bringing the insertion opening into a widened state;
• when the movable member is moved from the retract position to the hold position, then the second wall of the movable member moves toward the first wall of the lid body to narrow the insertion opening, bringing the insertion opening into a narrow state;
• the cylindrical surface is formed with a first rotation-preventer and a second rotation-preventer at a position closer to the bottom side of the insertion opening than the first rotation-preventer;
• the first rotation-preventer prevents rotation of the first needle unit inserted into the insertion opening;
• the second rotation-preventer prevents rotation of the second needle unit inserted into the insertion opening;
• the first rotation-preventer includes at least one first protrusion that protrudes radially inward of the insertion opening from the cylindrical surface by a first amount;
• the second rotation-preventer includes at least one second protrusion that protrudes radially inward of the insertion opening from the cylindrical surface by a second amount greater than the first amount;
• when the first needle hub is inserted into the insertion opening in the narrow state from the top side, then the first protrusion is inserted into one of first cutouts formed in an outer peripheral surface of the first needle hub;
• when the second needle hub is inserted into the insertion opening in the narrow state from the top side, then the second protrusion is inserted into one of second cutouts formed in an outer peripheral surface of the second needle hub;
• the first protrusion is aligned with the second protrusion in the second direction;
• a first protrusion imaginary circle coaxial with the insertion opening in the narrow state and passing through a tip end of the first protrusion has a first diameter that is smaller than an outer diameter of the first needle hub and greater than a first bottom diameter of a first hub imaginary circle defined by bottom surfaces of the first cutouts;
• a second protrusion imaginary circle coaxial with the insertion opening in the narrow state and passing through a tip end of the second protrusion has a second diameter that is smaller than an outer diameter of the second needle hub, greater than a second bottom diameter of a second hub imaginary circle defined by bottom surfaces of the second cutouts, and smaller than the first bottom diameter of the first hub imaginary circle;
• and
• when the first needle hub is inserted into the insertion opening in the narrow state from the top side, then the first needle hub abuts the second protrusion.

A needle disposal container for disposing of a first needle unit having a first needle hub and a second needle unit having a second needle hub with a smaller outer diameter than the first needle hub, comprising:

• a container body having an open top;
• and
• a covering attached to the container body, wherein:
• the covering includes a lid body that covers the open top of the container body and a movable member attached to the lid body so as to be movable relative to the lid body between a hold position and a retract position in a first direction;
• the lid body is formed with a first wall extending in a second direction perpendicular to the first direction, the first wall having a first surface with a concave-arc cross-section;
• the movable member is formed with a second wall extending in the second direction, the second wall having a second surface with a concave-arc cross-section, the second surface confronting the first surface of the first wall in the first direction;
• the first surface of the first wall and the second surface of the second wall together form a cylindrical surface that defines an insertion opening extending in the second direction, the insertion opening having a top side and a bottom side opposite to the top side in the second direction;
• when the movable member is moved from the hold position to the retract position, then the second wall of the movable member moves away from the first wall of the lid body to widen the insertion opening, bringing the insertion opening into a widened state;
• when the movable member is moved from the retract position to the hold position, then the second wall of the movable member moves toward the first wall of the lid body to narrow the insertion opening, bringing the insertion opening into a narrow state;
• the cylindrical surface is formed with a first rotation-preventer and a second rotation-preventer at a position closer to the bottom side of the insertion opening than the first rotation-preventer;
• the first rotation-preventer prevents rotation of the first needle unit inserted into the insertion opening;
• the second rotation-preventer prevents rotation of the second needle unit inserted into the insertion opening;
• the first rotation-preventer includes at least one first protrusion that protrudes radially inward of the insertion opening from the cylindrical surface by a first amount;
• the second rotation-preventer includes at least one second protrusion that protrudes radially inward of the insertion opening from the cylindrical surface by a second amount greater than the first amount;
• a pair of the first protrusions are formed on the first surface of the first wall with an interval in a circumferential direction of the insertion opening, and another pair of the first protrusions are formed on the second surface of the second wall with an interval in the circumferential direction;
• and
• a pair of the second protrusions are formed on the first surface of the first wall with an interval in the circumferential direction, and another pair of the second protrusions are formed on the second surface of the second wall with an interval in the circumferential direction.