XSP - Stairlift
Stairlifts are often underestimated in terms of their sophistication and complexity. Ultimately they are responsible for lifting up to 120Kg up a 70 degree inclined rail having been retrofitted to a unique staircase often with corners and obstructions to avoid. All while meeting the highest safety standards
This project was a massive redesign from the ground up to bring Stannah's premium product range into the modern era. This meant extra requirements including a powered fold and swivel option, proximity detection, easy customisation and class leading versatility.
Chair Concept Development
Original concept art for the chair design with attention on the 2d backrest and seat base.
A key design feature was the simple aesthetic with a single ribbon of material stretching around the chair to form the armrests.
The design for a seat base and backrest originally only had 2D curvature, it was eventually dropped in favour of a more complex curved design that meant a small cost increase but much better dimensional performance.
The final folded mechanism required the arms to each pivot inboard on their own axis in order for them to end up inside the swivel envelope. (This allows the chair to rotate 80 degrees while in its folded position without the arms hitting the wall)
A typical stairlift can be split into 2 parts, the drive system and the chair. The details of the drive system are not discussed on this page since they are unique and protected.
Requirements for the chair included the following.
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Single action fold
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Class leading folded dimension
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80 degree swivel capability
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Powered fold compatible
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Powered swivel compatible
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Non "toilet seat style" seat fold
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Class leading minimum seat height
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Modern aesthetic
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120Kg user compatible
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Easy change upholstery
