This creation is a kind of related anti-tipping apparatus structure of what, the one joint seat bottom end of anti-tipping apparatus system what is pivoted the support rod of a tool idler wheel, and a upright bar is equipped with above support rod what idler wheel, its upright bar and joint seat upper end two sides are all pivoted with adjustable shelf, and the adjacent one end system of each adjustable shelf is coaxially pivoted in one fixing seat of what, the shape and fixing seat system is in U-shape, its bottom has fastening part, thereby structure makes anti-tipping apparatus can Quick folding and expansion, when chair tool Hou end needed for it installs what, it will effectively prevent toppling over situation person.本創作係有關於一種防傾倒裝置結構，該防傾倒裝置係於一連結座底端樞設一具滾輪之支撐桿，而支撐桿於滾輪上方設有一立桿，其立桿及連結座上端兩側皆樞設有活動架，而各活動架相鄰之一端係同軸樞設於一固定座上，而固定座係呈U形狀，其底部具有卡制部，藉此結構使防傾倒裝置可快速收合及展開，其裝設於所需椅具後端時，將有效防止傾倒情況者。
