Corner assembly of a fixed outer frame of a trapdoor

Corner assembly of an outer frame of a trapdoor, wherein said corner assembly comprises a corner piece comprising:

• a body lying on a plane and having a first insert and a second insert respectively extending along a first longitudinal axis and a second longitudinal axis that are perpendicular to each other and suitable for being coupled with the sections of the outer frame of a trapdoor;
• a support wall rising orthogonally from the body in correspondence with the second insert and in parallel position to the second longitudinal axis, said support wall comprises a front face and a rear face, said support wall comprises through holes;
• wherein said corner assembly further comprises:
• a device arranged on the front face of the support wall and supported by said support wall, said device comprises holes aligned with the through holes of the support wall (3);
• crews inserted through the through holes of the support wall and the holes of the device to secure the device to the support wall, each screw having a tip protruding from the rear face of the support wall (3);
• wherein the corner piece comprises at least one protective partition connected to the body behind the rear face of the support wall in such a way to create at least one compartment that accommodates the tips of the screws and prevents the user from accidentally inserting his/her fingers inside the at least one compartment.