Backrest interlocking type frame for foldable wheelchair

Abstract

Disclosed herein is a backrest interlocking type frame for a foldable wheelchair. The backrest interlocking type frame includes: a seat frame which includes a first horizontal bar and a second horizontal bar spaced apart from each other at a predetermined interval and arranged at the top and the bottom of the seat frame, a first mounting member, a second mounting member, and a third mounting member mounted between the first horizontal bar and the second horizontal bar to be spaced apart from one another, a first bracket mounted on the first mounting member and a second bracket mounted on the second mounting member; a backrest frame which includes a first vertical bar and a second vertical bar formed integrally, wherein one end of the first vertical bar is rotatably mounted on the third mounting member of the seat frame through a first hinge portion, and both ends of a rail are fixed between the second mounting member and the third mounting member of the seat frame; a horizontally foldable frame rotatably mounted on the first bracket and the second bracket of the seat frame; and a transfer block mounted on the rail to move along the rail, wherein one end of a retractor is rotatably mounted on the transfer block through a third hinge portion, the other end of the retractor is rotatably mounted on the second vertical bar of the backrest frame through a second hinge portion, so that the horizontally foldable frame is operated to be folded when the backrest frame is folded downwardly, thereby reducing the overall width of the seat frame.