Presentation Board

In Colour

Design in Sketch up

My final Design

A Combination

I decided to combine the legs of the Gravity Balans and the rotational seat in one design, and this is what i came up with.

The Gravity Balans

Next i went to the library to find some inspiration for the further development of my chair. In the library i found this wonderful book by Peter Opsvik called 'rethinking sitting'. Some great ideas are explained in this book and in part of this Opsvik also mentions the importance of movement. One way he tackled the problem was by inventing the Gravity Balans. This chair really impressed me because the way it works is quite simple but very unique, instead of creating the bottom in a rounded manner like the usual rocking chair he has designed this to be made out of differently angled, flat surfaces so that the person can balance it on whichever angle preferred.

Improved seat

Finally i came up with this diagram on how the seat should work, being both secured to the chair yet having the possibility of rotational movement.
The first image is a section cut of the seat, the second shows the 3D form.

The seat

I wanted to design a better seating part of the chair as the last one was plainly a separate part placed on top of the chair. I started thinking of ways to connect this part properly and came up with these ideas. the first image i took a sort of train-rails approach, but as the arrows show, the only movement would be forward and backward. The second drawing shows the seat planted upon a circular rail, this way movement to every direction becomes possible.

Developing the Swiss ball

So i started with drawing the Swiss ball chair i had found on the internet, sketching up new ways i could possibly improve the design. One of the limitations i found was that the ball is actually kept in place by the plastic ring. So i quickly drew up a sketch where the entire ball is free to move in any direction, finding that this resulted in a quite dangerous looking chair for those slightly unbalanced. The next design i came up with was less scary looking, as the ball is flattened it creates a larges surface to roll on and lessening the possibility of rolling right off.