Patent ID: 8894162

Claim:
A stay for opening and closing an outward-opening door or an outward-opening cover configured to facilitate an opening and closing operation thereof installed on a housing via a hinge in an openable and closable manner, comprising: a hinge mounted to a housing and a door or a cover; a main body mounted to a side plate of the housing; an arm having one end rotatably connected to the main body; biasing means provided to the main body for biasing the arm so that the arm can rotate in at least one direction; an arm slider mounted to the arm so as to be slidable in a longitudinal direction of the arm; and a mounting seat installed on an inner surface of the door or the cover and rotatably connected to the arm slider, wherein, when the door or the cover moves from a fully open position to a fully closed position, and when the door or the cover moves from the fully closed position to the fully open position, a length from the arm slider to a rotation center of the arm continuously changes, and wherein, when seen from a direction of the rotation center of the arm, a pin which is a rotation center of the mounting seat relative to the arm slider is located away from the arm between the door or the cover and the arm located inside the door or the cover, wherein the arm slider has a slider main body which takes a shape of a frame surrounding the arm, and a projection which is formed integrally with the slider main body and in which a hole for the pin to fit in is formed, wherein the mounting seat has a plate main body mounted to the door or the cover, and a projection plate which is formed integrally with the plate main body and in which a hole for the pin to fit in is formed, and wherein a screw is fit in the pin through the projection of the arm slider.