Device for influencing a backward movement of a seat and seat

A seat in particular a vehicle seat, comprising:

• a seating part;
• a backrest part;
• and
• a device comprising:
• at least one deformation element arranged in a hinged area of a seating part of the seat,
• wherein the at least one deformation element is configured such that the at least one deformation element is deformable due to a force acting on the seating part or the backrest part or the seating part and the backrest part at a predefined torque curve,
• wherein the at least one deformation element is configured as a double ring,
• wherein the double ring comprises an internal ring, an external ring and deformable webs, and
• wherein the internal ring and the external ring are connected to each other by the deformable webs,
• wherein the internal ring is fastened to a transverse strut and the external ring is fastened to a side part,
• wherein said internal ring, said external ring and said deformable webs have coplanar outer surfaces and coplanar inner surfaces;
• wherein said deformation webs have different material expansion behaviors and/or different material strengths relative to said internal and external rings,
• wherein said internal ring has a constant-diameter, inner circumferential surface and said outer ring has a constant-diameter, outer circumferential surface, wherein said inner circumferential surface and said outer circumferential surface are concentric and entirely radially aligned with each other and have a same width.

A device for influencing a backward movement of a backrest part of a seat, the device comprising:

• at least one deformation element arranged in a hinged area of a seating part of the seat, wherein the at least one deformation element is configured such that the at least one deformation element is deformable due to a force acting on the seating part or the backrest part or the seating part and the backrest part at a predefined torque curve;
• wherein the at least one deformation element is configured as a double ring,
• wherein the double ring comprises an internal ring, an external ring and deformable webs, and
• wherein the internal ring and the external ring are connected to each other by the deformable webs, wherein said internal ring, said external ring and said deformable webs have coplanar outer surfaces and coplanar inner surfaces,
• wherein the internal ring is fastened to a transverse strut and the external ring is fastened to a first side part,
• wherein said internal ring and said external ring are formed of a first material and said deformable webs are formed of a second material, wherein said second material is different than the first material;
• wherein said deformation webs have different material expansion behaviors and/or different material strengths relative to said internal and external rings,
• wherein said internal ring has a constant-diameter, inner circumferential surface and said outer ring has a constant-diameter, outer circumferential surface, wherein said inner circumferential surface and said outer circumferential surface are concentric and entirely radially aligned and have a same width.