A connecting device for transmitting pressurized fluids including a pipe having an inner flow channel, a body including an inner cavity isolated from the inner flow channel, and a displacement member for moving the pipe in the body between an unlocked configuration and a locked configuration and wherein the displacement member includes a pusher member movable within the body, an off-centered member connected to the slide member, a connecting rod ring and a rear housing formed in the body, defining a first articulation diameter (φ1) between the pusher member and the off-centered member around a first axis (A1), a second articulation diameter (φ2) between the off-centered member and the connecting rod member around a second axis (A2), and a third articulation diameter (φ3) between the connecting rod ring and the rear housing around a third axis (A3) and wherein the three axes are separate and parallel to a transverse direction transverse of the device.