Opening system for a door of a freeze-drying machine

An opening system (1) for a door of a freeze-drying machine (101), said system (1) comprising:

• a door (22) configured to close an access window (103} of a freeze-drying machine (101};
• a motion transmission mechanism (2) configured to control opening and closing of said door (22);
• a support wall (3) configured to support said transmission mechanism (2);
• 10 said transmission mechanism (2) comprising:
• a primary drive shaft (4) rotating around a first axis of rotation (X) substantially perpendicular to said support wall (3), characterised in that said transmission mechanism (2) further comprising:
• a first wheel (5) coaxially mounted to said primary drive shaft (4) and
• 1s fixed to said support wall (3) so as not to rotate,
• a first transmission lever (6) rigidly coupled to said primary drive shaft
• (4) in a first proximal area so as to rotate about said first axis of rotation (X),
• a second idle wheel (7) idly cooperating with said first wheel (5) and
• 20 rotatable mounted around a second axis of rotation (Y) on said first transmission lever (6), a third wheel (8) cooperating with said second idle wheel (7) and rotatably coupled to said first transmission lever (6) at a first distal region thereof,
• wherein said first (5), second (7) and third wheels (8) are housed within a closed box (11}.