| 摘要 |
The present invention relates to a hinge device for a door of a washing machine, capable of stabilizing opening and closing movements of a door of a washing machine and opening and closing speeds. The hinge device for a door of a washing machine includes: a housing (10) fixed to one among a washing machine main body or the door and having multiple guide protrusions (11) on an inlet, wherein an injection hole (12) in which oil is injected is formed on the rear side of the housing (10); a spring (20) inserted into the housing (10); an oil damper (30) elastically supported by the spring (20) and having a first oil flow path (30a) passing through the inside and a second oil flow path (30b) formed on the outer side; a lower cam (40) attached to a front end of the oil damper (30) and having a guide groove (41) guided by the guide protrusion (11) on the side, wherein the lower cam (40) also has a first cam (45) having a slope on the upper part; an upper cam (50) having a second cam (55) in the lower part and an insertion protrusion (51) formed on the upper part, wherein the second cam (55) is connected to the first cam (45); a main O-ring (60) attached to the inner circumference of the housing (10) while being connected to the insertion protrusion (51), wherein the main O-ring (60) prevents an O-ring charged in the housing (10) from flowing to the outside; a hinge shaft (70) connected to the upper cam (50) not to be rotated, wherein the hinge shaft (70) is fixed to the other one among the washing machine main body or the door; and a bush cover (80) supporting the hinge shaft (70) in order for the hinge shaft to penetrate the bush cover, wherein the bush cover (80) is connected to the inlet of the housing (10) and enables the hinge shaft (70) to smoothly rotate. |
