Abstract: A stay for opening and closing of a door does not become a hindrance when the door is open and is visually uncluttered. The stay has: a main body mounted to a housing; an arm having one end rotatably connected to the main body; a biasing element on the main body and biasing the arm so the arm rotates in at least one direction; an arm slider mounted to the arm and slidable in the longitudinal direction of the arm; and a mounting seat installed on the door and rotatably connected to the slider. As the slider is slidable relative to the arm and rotatable relative to the mounting seat installed on the door, an opening and closing force can be transmitted to the door from the one arm without requiring two links. Thus, the stay does not become a hindrance to a user and is visually uncluttered.

Abstract: The distal end part of an arm 5 is turnably and removably connected to the distal end part of a base part 5 through a connection mechanism 7. An engagement recess 46 whose upper part opposing the arm 5 is open, is formed in a basal end part of the base part 2. The arm 5 is provided at its basal end part with an engagement pin 8 capable of fitting in the engagement recess 46 when the arm 5 is turned to an attachment position. A lock lever 6 for pressing the engagement pin 8 against the bottom part of the engagement recess 46 under the biasing force of a coiled spring 9, is turnably disposed at the distal end part of the base part 2 through a support pin 103. The lock lever 6 is provided at its distal end part with a pressing part 67 for pushing up the engagement pin 8 so as to escape from the engagement recess 46 when the lock lever 6 is turned clockwise against the biasing force of the coiled spring 9.

Abstract: The distal end part of an arm 5 is turnably and removably connected to the distal end part of a base part 5 through a connection mechanism 7. An engagement recess 46 whose upper part opposing the arm 5 is open, is formed in a basal end part of the base part 2. The arm 5 is provided at its basal end part with an engagement pin 8 capable of fitting in the engagement recess 46 when the arm 5 is turned to an attachment position. A lock lever 6 for pressing the engagement pin 8 against the bottom part of the engagement recess 46 under the biasing force of a coiled spring 9, is turnably disposed at the distal end part of the base part 2 through a support pin 103. The lock lever 6 is provided at its distal end part with a pressing part 67 for pushing up the engagement pin 8 so as to escape from the engagement recess 46 when the lock lever 6 is turned clockwise against the biasing force of the coiled spring 9.