Drug-filled synthetic resin ampule and synthetic resin ampule body used for same

A synthetic resin ampule body for a drug-filled ampule, comprising

• a tip-side sealing portion, a hollow portion having a drug containing portion, and an annular breakable portion provided at a lower portion of the tip-side sealing portion;
• wherein the annular breakable portion includes an annular smallest diameter portion, and the tip-side sealing portion includes a flat plate portion for grasping formed at an upper portion thereof and an internal ceiling portion exposed to an interior of the hollow portion;
• the smallest diameter portion of the annular breakable portion is located near an annular circumferential edge portion of the internal ceiling portion and is located above the annular circumferential edge portion of the internal ceiling portion;
• the internal ceiling portion has a flat portion located radially inward of the annular circumferential edge portion and below the annular breakable portion;
• the hollow ampule body has a diameter reducing portion that reduces in outer and inner diameter toward the annular breakable portion;
• and
• the annular breakable portion has a thin weak portion located at an upper end portion of said diameter reducing portion and located between the annular smallest diameter portion and the annular circumferential edge portion.

A drug-filled synthetic resin ampule comprising

• a hollow ampule body, a lower-end-side sealing member for sealing a lower end of the hollow ampule body, and a drug filled in the hollow ampule body;
• wherein the hollow ampule body includes a tip-side sealing portion, a hollow portion located below the tip-side sealing portion and having a drug containing portion therein, and an annular breakable portion provided at a lower portion of the tip-side sealing portion;
• the tip-side sealing portion includes a flat plate portion for grasping formed at an upper portion thereof and an internal ceiling portion exposed to an interior of the hollow portion;
• the annular breakable portion includes an annular smallest diameter portion which is located near an annular circumferential edge portion of the internal ceiling portion and is located above the annular circumferential edge portion of the internal ceiling portion,
• an upper portion of the hollow portion gradually decreases in wall thickness toward the smallest diameter portion of the annular breakable portion,
• the annular breakable portion includes an annular upper sloping portion extending upward from the smallest diameter portion and an annular lower sloping portion extending downward from the smallest diameter portion, and an angle between the annular upper sloping portion and the annular lower sloping portion is 45° to 75°,
• the internal ceiling portion has a flat portion located radially inward of the annular circumferential edge portion and below the annular breakable portion,
• the hollow ampule body has a diameter reducing portion that reduces in outer and inner diameter toward the annular breakable portion, and
• the annular breakable portion has a thin weak portion located at an upper end portion of said diameter reducing portion and located between the annular smallest diameter portion and the annular circumferential edge portion.