Pressure relief latch

Pressure relief latch (30, 130, 230) for assembling in a removable way an aircraft panel (51) with an aircraft structure (53), said latch including:

• a console (31, 131, 231) able to be connected to the panel (51);
• a lever (34, 134, 234) mounted on the console so as to rotate about a first axis (35, 135, 235),
• an opening effort (E) exerted on a fulcrum (46, 146, 246) of the lever causing an angular displacement (D) of said fulcrum relative to the first axis, between a closing position and an opening position,
• a roller (37, 137, 237) arranged along a second axis (39) substantially parallel to the first axis, able to roll against a profile (36, 136, 236) of the lever when said lever moves between said positions,
• said roller being connected to a first end (41) of at least one elastic return device (42, 142, 242), one second end (43) of said device being connected to the console,
• the latch being characterized in that it is provided with means (47, 48, 136, 260) able to vary the angular displacement (D) of the fulcrum of the lever according to the opening effort so that:
• between a minimal opening effort Ec, and an intermediate opening effort E1, the function D=f(E) has a slope higher than a value (X),
• between the intermediate effort E1 and a maximum opening effort E2, the function D=f(E) has a slope lower than said value (X),
• said maximum effort E2 corresponding to a maximum pressure between the panel and the structure, beyond which the opening position is reached,
• said means (47, 48, 136, 260) being supported by the elastic return device and/or the profile of the lever and/or the fulcrum of the lever.