Handrail hinge device and floor box adopting handrail hinge device

The utility model discloses a handrail hinge device and a floor box adopting the handrail hinge device. The armrest hinge device comprises: an armrest hinge; damper (4), upper hinge (5), a hinge shaftpin (6), lower hinge (8), the upper hinge (5) is hinged; the lower hinge (8) is hinged through a hinge shaft pin (6); the method is characterized in that the method is characterized by comprising thefollowing steps; a groove structure is arranged on the upper hinge (5), the damper (4) is sleeved on the hinge shaft pin (6) and clamped in the groove structure, damping is added on the hinge shaft pin, gravitational moment of the handrail and closing moment and damping moment of the lock catch are balanced, and slow and linear falling of the handrail in the closing process is achieved. By combining the damping characteristic of the handrail and the closing force of the handrail lock catch, through the lightweight design of the handrail hinge and the centered arrangement of the damping, automatic closing of the handra