Patent ID: 7168763
Filing Date: 2007-01-30
Classification: B60N

Abstract:
1. A seatback reclining apparatus having a reclining means comprising: a seatback divided into a main seatback and a subsidiary seatback; a reclining shaft to which the main seatback and the subsidiary seatback are rotatably coupled at the lower end thereof; a first winding part integrally formed at one end of the reclining shaft; a second winding part integrally formed at the reclining shaft, apart from the first winding part with a predetermined distance, a diameter of the second winding part being smaller than a diameter of the first winding part; a first spiral spring wound around the first winding part; and a second spiral spring wound around the second winding part, wherein a number of winds in the second spiral spring is greater than a number of winds in the first spiral spring.