The utility model discloses an adjustable backrest seat, including backrest,
cushion, chair frame, and backrest is connected with
cushion through adjusting device, and adjusting device includes connecting rod, and connecting rod includes first end, second end, and removes backrest and can swing along the center of second end, and backrest is hinged with chair frame through connecting rod, and staff can quickly adjust its orientation
train advancing direction when
train reversal, and it is simple and easy to operate and is convenient for batch regulation, after adjusting, locking
assembly connects backrest end, utilizes movable disc and spring bolt structure, and backrest can be fixed quickly without tool, prevents displacement, locking
assembly is connected through sleeve
pipe, and both sides synchronous action when adjusting, makes backrest stress even, removes smoothly, and
cushion floating
assembly is connected with transmission sleeve
pipe, and cushion automatically adjusts the inclination direction when backrest adjusting, and the angle of coordination with backrest, reduces repeated regulation.