| 摘要 |
PURPOSE: A door hinge with a speed control unit is provided to enable a door closure to be smoothly performed without significant change in length or diameter of a door hinge. CONSTITUTION: A door hinge with a speed control unit is as follows. If a door automatically returns by a torsion spring after opening, the speed control unit controls the return speed of the door with working fluid. The speed control unit comprises a speed control shaft(20), an overflow unit, an upper cover(50) and a speed control housing(10). A groove is formed on one end of the speed control shaft to be coupled to the torsion spring. A protrusion is formed on the other end of the speed control shaft outwardly from the central part of the speed control shaft. The overflow unit is arranged on the top of the speed control shaft and transfers working fluid vertically. |
