Rail segment system for modular stairlifts

A rail segment for a stairlift, comprising:

• a body having a first face and a second face opposite the first face, the first and second faces being disposed at a non-parallel angle to each other;
• a first keying protrusion disposed on and extending from the first face;
• a first keying recess defined in the second face that is in alignment with, and has a complementary shape to, the first keying protrusion, the first keying recess configured to lockingly engage with a second keying protrusion extending from an adjacent modular rail segment, which second keying protrusion has an identical shape to that of the first keying protrusion;
• and
• an axis of rotation defined adjacent a distal end of the first keying recess and parallel to each of the first face and second face, wherein the first keying recess is configured to permit the second keying protrusion of the adjacent modular rail segment to be lockingly engaged therein via pivotably rotating the adjacent modular rail segment toward the rail segment about the axis of rotation, so as to pivotably rotate the second keying protrusion into engagement with the first keying recess to couple the adjacent modular rail segment to the rail segment.