| 摘要 |
PURPOSE: A damper unit is provided to control the elasticity of a spring and to obtain the effect of a damper if a door is light or heavy. CONSTITUTION: A damper unit(10) is adhered between a housing and a door. The damper unit prevents the door from being opened violently as the door is fallen toward the lower area by the weight of itself. The damper unit has a case(40), a shaft(50), a spring and a viscous fluid. Any side of at least two protrusions(140,150) is formed between the case and the shaft. The two protrusions permit the rotation of the shaft in the opposite direction. Also, the two protrusions counterbalance the rotational force of the spring per a specific angle when rotating the shaft in the opposite direction.
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