The idea behind the seating on this set, which represens a very small spacecraft, was that it would have to work in two orientations. A bonus challenge was that for space saving purposes, the three chair seats would have to transform into three configurations.
For safety and reliability purposes (because every minute of mechanical trouble delay on a working set costs a significant amount of money), the mechanism had to be as simple as possible.
Eventually I designed a umbrella-like mechanism to make them work with just two moving fulcrums.
The chairs in 'pilot' orientation, when the craft is travelling in space and engine thrust is coming from (when the craft is landed is) the bottom of the set.
After landing on a planet, the chairs in sitting orientation.
...and in sleeping orientation.