| 摘要 |
PURPOSE: An auto leveling system of a ladder in a double bed is provided, which makes space utilization rate excellent and enables a user to conveniently use the ladder. CONSTITUTION: An auto leveling system of a ladder in a double bed comprises: a lower frame(110) in which a mattress is installed on the inner side; an upper frame(100) which is supported on the top of lower frame by a plurality of vertical supports and in which the mattress is installed on the inner side; a first pivot structure(140) which is equipped between the upper frame and the upper end of the vertical pillar of the ladder and makes pivot of the upper end of the ladder possible; and a second pivot structure(150) controlling an interval between the vertical pillar and lower frame. |
