Seat backrest frame has transverse top strut selectively fitted with height-adjustable headrest or integrated headrest frame

摘要

The seat backrest frame has a transverse top strut (1) which incorporates a mounting frame (1a) for a height-adjustable headrest, allowing optional attachment of a rigid headrest frame (5) for an integrated headrest. The headrest frame is U-shaped with the ends of its side arms (5a,5b) attached to the corresponding side struts (3,4) of the backrest frame.