| 摘要 |
The present invention relates to a backrest attachment device for a chair ( 1 ). It comprises a metal bow ( 7 ) with two bends that is designed such that a shorter intermediate piece ( 9 ) with a 90° bend is connected to a comparatively long flank ( 8 ), the shorter intermediate piece ( 9 ) in turn having connected to it a shorter end piece ( 10 ) with a 90° bend, wherein the intended level formed by the long flank ( 8 ) and the intermediate piece ( 9 ) and the intended level formed by the intermediate piece ( 9 ) and the end piece ( 10 ) are perpendicular to each other, and the metal bow ( 7 ) can be inserted with its long flank ( 8 ) through an elongated hole ( 11 ) introduced into the backrest frame ( 6 ) and interlocked with a simple rotary motion in an interlocking mechanism ( 12 ) within the backrest frame ( 6 ), and wherein the end piece ( 10 ) of the metal bow ( 7 ) can be connected to the frame ( 4 ) of the chair ( 1 ).
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