The present invention discloses a cage structure comprising a cage body； a curved arc side is formed on one side of the cage body, and a straight side is provided on the other side, and a corner of the straight side is provided with a corner to the apex； The outer surface of the upper and lower ends of the cage body is convexly provided with a ratchet-shaped engaging tooth. Thereby, a cage structure with good installation and better stability characteristics is achieved.本創作揭露一種椎籠構造，包含椎籠本體；該椎籠本體一側形成曲弧邊，相對應的另側則為直邊，直邊的一側端設有一轉角的抵頂點者；又於椎籠本體的上、下端外表面，凸設有棘齒狀之卡合齒者。藉此，達到具有良好安裝及較佳的穩定特性之椎籠構造。
