ANTIPARALLELOGRAM FOLDING STRUCTURE, STROLLER, CHAIR, STOOL, TABLE, PRAM, TROLLEY

摘要

A foldable bearing structure includes a set of coplanar wheels and a folding device including a set of lower arms; at least a rear upper arm; an antiparallelogram deformable in a vertical plane, the antiparallelogram including two crossed segments; at least a first sidebar located in the vertical plane; the antiparallelogram deformed by folding between a first position, corresponding to an unfolded of the structure and a second position corresponding to a folded position, the transition from the first position to the second position reducing the wheelbase of the structure.

主权项

1. A folding bearing structure comprising:
a set of coplanar support points including at least two rear support points and at least one front support point; at least two folding devices each comprising
a set of lower arms comprising at least one front lower arm and rear lower arm each comprising a first end, each being connected to one of the support points;an antiparallelogram deformable in a vertical plane, said antiparallelogram comprising two crossed segments with:
a first end and a second end each being fixed by a first and a second attachment to a first end of the front lower arm and a first end of the rear lower arm respectively;a third end and a fourth end each being fixed by a third and a fourth attachment to a first point on the front lower arm and a first point of the rear lower arm (13) respectively;wherein, the antiparallelogram is deformable by folding between a first position corresponding to an unfolded position of the folding bearing structure and a second position corresponding to a folded position of the folding bearing structure, a change from the first position to the second position reducing a wheelbase of the folding bearing structure; two sides, a distance separating the two sides defining a width of the folding bearing structure, each of the two sides being defined in a vertical plane and comprising at least one distinct rear support point for each of the two sides and at least one front support point, the antiparallelogram of a respective one of the at least two folding devices deformable in the vertical plane of a respective one of the two sides of the folding bearing structure, and a central folding system to reduce the open width of the folding bearing structure as the folding bearing structure changes between the first position and the second position.