A kind of coffin dental lamina limit structure improvement of what is closed in this creation system,Its mainly by bottom plate,Latch part,Two long side plates,Two short side plates,Lid and the soft part that pulls and supports of plural number form,Floor peripheral is equipped with the side strip for being interconnected so as to form accommodating area,And each long side plate and each short side plate are separately positioned on accommodating area,Wherein each long side plate what plate face both sides form a guidance part,Therefore it is inserted into for short side plate,Make each long side plate and each short side plate that an accommodating space be collectively formed,And each latch part then wears side strip respectively and is pivotally connected each long side plate,Each long side plate is enabled to rotate by each latch part,By each soft side wall surface for pulling and supporting part both ends and being separately connected what plate inner wall face and long side plate of what,It thereby can effectively limit long side plate and open range,It is excessive to avoid long side plate opening range,And it pours out and impaired or fracture.本創作係關於一種棺材板限位結構改良，其主要由底板、插梢件、二長側板、二短側板、蓋體以及複數軟性拉持件組成，底板週邊設有相互連接以形成容置區的側邊條，而各長側板及各短側板分別設置在容置區，其中各長側板於板面兩邊形成一導引部，因此可供短側板插入，使各長側板及各短側板共同形成一容置空間，而各插梢件則分別穿設側邊條並樞接各長側板，令各長側板藉由各插梢件而旋轉，由於各軟性拉持件兩端分別連接於底板內壁面及長側板的側壁面，藉此能有效限制長側板開啟範圍，以避免長側板打開範圍過大，而向外傾倒而受損或斷裂。
