US Patent 10131258 Vehicle seat

A pair of brackets (25, 30) are provided on either side of a seat back frame (10), each bracket defining a support hole (27, 31) for rotatably supporting a support shaft (41) of an arm rest, and a guide slot (28, 32) for guiding a corresponding guide pin (42B, 42C) of the arm rest along an arcuate path centered around the corresponding support hole. The two guide slots are offset from each other, and the guide pins are offset from each other in a corresponding manner in side view so that the two brackets may be offset from each other. Thereby, the layout of the brackets for rotatably supporting the arm rest can be selected in an advantageous manner.