Aircraft seat

An aircraft seat, comprising:

• at least one actuator configured to generate movement;
• and
• at least one movement transmission device comprising:
• a frame provided with a through-bore extending in an axial direction;
• a drive body suitable for being rotated relative to the frame about an axis extending in an axial direction, said drive body being arranged in the bore,
• wherein said frame comprises at least one bearing face and at least one braking face, and wherein the drive body is arranged in the bore to move freely in translation along at least the axial direction relative to the frame, said drive body comprising at least one bearing face facing the bearing face of the frame and at least one braking face facing at least part of the braking face of the frame;
• at least one elastic element arranged between said at least one bearing face of the frame and said at least one bearing face of the drive body in order to keep said at least one braking face of the drive body at a defined distance from said at least one braking face of the frame, said at least one elastic element having a determined stiffness and being prestressed such that, when an axial load greater than a threshold load is applied to the drive body, said elastic element is compressed and said at least one braking face of the drive body comes into contact with said at least one braking face of the frame;
• wherein the drive body comprises:
• a ball screw nut;
• a ball screw suitable for being driven in translation by the ball screw nut;
• a cylindrical casing which lies in the extension of the ball screw nut, said cylindrical casing comprising a first end integral with the ball screw nut and a second free end;
• and
• a radial wall integral with at least one end of the cylindrical casing, said at least one braking face, and said at least one bearing face of the drive body being arranged on said radial wall.