Abstract: The refrigerator self-locking structures always have lots of problems, such as small locking angle, lacking of smoothness, poor reliability etc. Some optimizations are done on the hinge self-locking curve during the process of pushing and self-locking in this article. By comparison, many key parameters of the new hinge self-locking structure are obviously improved, such as self-locking angle, minimum closing force, minimum closing torque etc. And the closed noise is obviously improved.

Key words: Refrigerator, Hinge, Self-locking, Optimization, Noise