Device for applying liquid medical substances

A device (1) for the application of liquid medical substances (100), comprising:

• a main body (2) extending around a longitudinal axis (X) and comprising a housing portion (3) and a delivery portion (5);
• a cartridge reservoir (7) containing a liquid medical substance (100), hermetically sealed and suitable for being inserted into said housing portion (3);
• a perforating element (8) disposed inside said main body (2) in a position falling between said housing portion (3) and said delivery portion (5) in order to achieve the perforation of one end of said cartridge reservoir (7);
• said perforating element (8) having a tubular shape and comprising inside the tubular shape a cylindrical conduit (12) having a cutting edge (14) faced toward the housing portion (3), wherein said conduit (12) serves to place said housing portion (3) in fluid communication with said delivery portion (5),
• characterized in that said perforating element (8), presenting at an end opposite the cutting edge (14) a flanged base (13) for connecting with said main body (2), has a first height (h1), defined between the lowest point of said cutting edge (14) and said base (13), not less than 50% of an inner diameter (d4) of the cylindrical conduit (12), and a second height (h2), defined between the highest point of said cutting edge (14) and said base (13), not less than 70% of the inner diameter (d4) of the cylindrical conduit (12).