Shape-adjustable bearing structure

A structure which can be rolled up as a whole and which is convertible between an operational shape as a seat and a compact carrying or rest shape having a smaller volume than the operational shape, said structure comprising:

• a bearing part acting as a support for the structure when the structure is in the operational shape, said bearing part having an edge section and another section adjoining said edge section;
• a seat part swingably joined with said edge section of said bearing part and having a seating surface on which a person can sit when the structure is in the operational shape;
• each of said bearing and seat parts including rod-shaped bearing elements located close together and being hingably joined with each other along their lengths so that said rod-shaped bearing elements can be rolled up as a whole, said rod-shaped bearing elements being substantially rigid against bending in their lengthwise direction, said rod-shaped bearing elements of said seat part and said rod-shaped bearing elements of said edge section of said bearing part adjoining each other at their ends, said bearing elements of said another section of said bearing part being longer than said bearing elements of said edge section of said bearing part;
• an individual hinge provided between said adjoining bearing elements of said seat part and of said edge section of said bearing part to permit folding of said seat part from a first position wherein said seat part lies against said edge section of said bearing part to a second position wherein said seat part extends at a right angle relative to said edge section of said bearing part, said another part of said bearing part being positionable around said seat part;
• and
• means for supporting said seat part in said second position.