Patent ID: 7591045

Claim:
A buffer apparatus for a ceiling screen having a case and a lid pivotally coupled on one lateral end of the case, the lateral end having a first action side and a second action side on two sides thereof corresponding to each other, the buffer apparatus comprising: a first action side on one side of the lateral end having a speed reducing mechanism to reduce the flipping speed of the lid when unfolding by an elastic force of a first elastic element and provide a buffer effect when the lid is between a folded position and a vertical position; and a second action side on another side of the lateral end having a second elastic element compressed by flipping the lid at an initial unfolding stage between the folded position and the vertical position to provide a buffer effect, and expanded at a later unfolding stage to provide a returning elastic force to move and anchor the lid at a desired viewing position, wherein the first action side includes: a first bracing dock located on one side of the lateral end of the case to hold the speed reducing mechanism to reduce the flipping speed of the lid and provide the buffer effect; a first axle seat located on one side of a lateral end of the lid having a first axle bore to house an axle; and the first elastic element to provide the elastic force to unfold the lids wherein the axle has a first axle end extending outside the first axle seat, and wherein the first axle end has at least one first fastening hole to receive a screw to fasten the first axle end to at least one corresponding first strut of the case.