| 摘要 |
PURPOSE: A door closer is provided to freely control the opening degree of a door and to maintain the opened state of the door. CONSTITUTION: A door closer comprises a doorframe mounting unit(100), a power transmission unit(200), and an actuating arm(300). The doorframe mounting unit is composed of an attachment unit and a mounting unit. The attachment unit is installed on a doorframe(F). The mounting unit is integrally formed on the attachment unit. The power transmission unit is composed of outer and inner frames(210,230), an elastic spring, and a rotation link(240). The elastic spring connects the mounting unit to the outer frame. One end of the rotation link is connected to the mounting unit. One side of the actuating arm is installed on the door, and the other side is connected to the other end of the outer frame. |
