Retractable stairway

Abstract

The invention provides a retractable stairway. The retractable stairway comprises a step plate assembly, a railing and handrail assembly and a transmission box assembly. The railing and handrail assembly is connected to the upper side of the step plate assembly, and the transmission box assembly is fixedly connected to an exit position of a house and is in driving connection with the step plate assembly. The step plate assembly comprises a step plate lower frame, a step plate upper frame and step plates; the railing and handrail assembly comprises railings, handrail supports, handrails and positioning supports; and the transmission box assembly comprises a transmission box, driving arms, driving connecting rods, main pin shafts, driven pin shafts and a motor. The retractable stairway can be extended and retracted, and can adapt to the landform to adjust the extending and retracting angles; and in the using state, the step plates are always kept horizontal, and the railings are always kept vertical.

Description

technical field [0001] The invention relates to the technical field of smart houses, in particular to a retractable staircase. Background technique [0002] Folding or retracting stairs in the prior art generally adopts the following methods: [0003] Firstly, the ring-shaped groove plate provided at both ends of the step plate is used as the support of the steps, and the groove plate is stretched to achieve the folding of the stairs; most of these devices are manually retractable, and the pedals are non-rigidly connected. Poor rigidity and stability. [0004] Second, the entire staircase is divided into two or more sections, which are connected and folded by rotating joints; this method is only a symbolic folding and has poor load-carrying capacity. [0005] Third, the attic stairs are folded, and a foldable tread plate frame is set on a fixed metal frame, and the folding is realized by pulling the connecting rod mechanism by a motor; the tread plate of this mechanism is ...

AI Technical Summary

Problems solved by technology

[0003] Firstly, the ring-shaped groove plate provided at both ends of the step plate is used as the support of the steps, and the groove plate is stretched to achieve the folding of the stairs; most of these devices are manually retractable, and the pedals are non-rigidly connected. Poor rigidity and stability

[0004] Second, the entire staircase is divided into two or more sections, which are connected by rotating joints and folded; this method is only a symbolic folding, and the bearing capacity is poor

[0005] Third, the attic stairs are folded, and a foldable tread plate frame is set on a fixed metal frame, and the folding is realized by pulling the connecting rod mechanism by a motor; the tread plate of this mechanism is steep, and the angle with the horizontal ground is too large, and a small angle cannot be realized gentle slope uplift

[0006] The above methods generally have the problems of poor rigidity, unsatisfactory folding or retracting

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