Abstract: A recessed seam structure for a cover (3) that improves workability when forming a recessed seam (A) and allows frequent attachment and detachment at the recessed seam (A) is provided. In a seat (1) having the recessed seam (A) formed by pulling part of the cover (3) toward a side of a cushion material (2), the recessed seam (A) is provided with an opening and closing fastener (30) configured to couple the cover (3) and the cushion material (2), and the opening and closing fastener (30) includes a first fastener half (31) fixed to a back face of the cover (3) and a second fastener half (32) fixed to the cushion material (2). In such a seat (1), the recessed seam (A) can be formed easily and reliably on the seat (1) by aligning an end of the first fastener half (31) in a longitudinal direction and an end of the second fastener half (32) in the longitudinal direction of the opening and closing fastener (30) and simply sliding a slider (33).

Abstract: The purpose of the present invention is to provide a seat that makes it possible to easily connect the end of a surface cover when assembling the surface cover and to achieve a secure connection. To this end, a seat (1) is provided with inclined piles (70, 80) on the end of the surface cover (4) and at a location that faces the end of the surface cover (4) on a cushion member (2) that forms a seat section, the inclined pile (80) of the cushion member (2) is inclined in a direction that is the opposite of the direction in which a load resulting from a seated person occurs, and the inclined pile (70) of the end of the surface cover (4) is inclined in the direction in which the load resulting from a seated person occurs.

Abstract: The present invention provides a seat which is unlikely to cause wrinkles or slack in a surface cover thereof, makes surface cover attachment and detachment simple, and is also capable of withstanding long-term use. To this end, a second fastening part 50 for attachably/detachably connecting a cushion material 2 and a surface cover 4 to one another is formed as a zipper in a seat 1.