초록 ▼

A door closer unit (100) including a cylindrical housing (10) with a partition (14) axially extending inside and having a first liquid path; a moving body (20) with a movable barrier (24) dividing the interior of the housing into first and second chambers, and a rotational shaft (21) having an upper

A door closer unit (100) including a cylindrical housing (10) with a partition (14) axially extending inside and having a first liquid path; a moving body (20) with a movable barrier (24) dividing the interior of the housing into first and second chambers, and a rotational shaft (21) having an upper end extending upward; a door return spring (30) applying a recovering force to the door in a direction opposite to the direction when the moving body's rotational shaft (21) or housing (10) rotates in one direction; a high-viscosity liquid filling in the housing; a control check valve for opening a second liquid path when the door is opened, and closing the second liquid path when the door is closed; a cover (40) rotatably supporting the rotational shaft (21) of the moving body (20) and sealing the upper portion of the housing (10); a speed controller (19) regulating the amount of the liquid when the door is opened or closed, thus controlling the speed of the door; and a door stopper (29) for stopping the door when the door reaches to a predetermined rotating angle including the door's initial position.

대표청구항 ▼

[ What is the claimed is:] [1.] A door closer unit comprising:a cylindrical housing with a partition axially extending from one side of its inner surface and having a first liquid path and a tiered shaft receiving nest on the center of its inner bottom;a moving body with a movable barrier having an

[ What is the claimed is:] [1.] A door closer unit comprising:a cylindrical housing with a partition axially extending from one side of its inner surface and having a first liquid path and a tiered shaft receiving nest on the center of its inner bottom;a moving body with a movable barrier having an outer surface in a sliding contact with the partition, protruding from its one side to be in sliding contact with the inner surface of the housing, and dividing the interior of the housing into first and second chambers, and a rotational shaft having a lower end rotatably housed in the shaft receiving nest and an upper end extending upward;rotating body return means disposed between the shaft receiving nest and the moving body's inner groove, and, when one of the moving body's rotational shaft and housing is fixed to a doorframe and the other is fixed to the door and rotates in one direction, applying a recovering force to a rotating body in a direction opposite to said direction;a high-viscosity liquid filling in the housing;first check valve means disposed on one side of the movable barrier, opening a second liquid path allowing the first and second chambers to communicate with each other when said rotating body rotates in one direction, and closing the second liquid path when the rotating body turns in a direction opposite to said direction;cover means rotatably supporting the rotational shaft of the moving body and sealing the upper portion of the housing; andspeed control means regulating the amount of the liquid flowing from one chamber of high pressure to the other chamber of low pressure via the first liquid path of the housing when said rotating body is turned, thus controlling the speed of said rotating body;the door being opened if said rotating body is turned in one way, and the door being closed if the rotating body is turned in the opposite direction by the recovering force from the return means, when opening the door, the liquid flowing through said first and second liquid paths whereby the rotating body is turned at high speed, and when closing the door, the liquid flowing through the first liquid path only whereby the rotating body is turned at low speed.