Device and method for automatically restoring seatback

A device for automatically restoring a seatback, comprising:

• a seat cushion;
• a seatback installed in the seat cushion to be adjustable in angle;
• a seat rail installed in a floor panel of a vehicle in a length direction of the vehicle;
• a seat track having an upper portion, in which the seat cushion is mounted, and slidably installed in the seat rail;
• a seat position detection sensor installed in either the seat rail or the seat track and configured to detect a position of the seat track;
• a seat position detection member installed in either the seat rail or the seat track in which the seat position detection sensor is not installed and configured to operate the seat position detection sensor;
• and
• a seatback angle adjustment motor configured to adjust an angle of the seatback in response to an output signal from the seat position detection sensor,
• wherein, in response to the seat position detection sensor detecting that the seat track has reached a predetermined operating position, the seatback angle adjustment motor deploys the seatback.