Assembly for a first backrest and a second backrest of a vehicle seat

An assembly for a first backrest and a second backrest of a vehicle seat, the assembly comprising a first suspension system for attachment to a first frame and a second suspension system for attachment to a second frame, wherein:

• the first suspension system comprises:
• a first main support, the first main support has a first main plate, the first main plate extends in a first elevation direction between a first upper main edge and a first lower main edge, the first main plate extends along a first transverse direction between a first main edge on the first side and a first main edge on the second side, the first transverse direction is perpendicular to the first elevation direction,
• a first ancillary support, the first ancillary support has a first ancillary plate, the first ancillary plate has a first central portion extending in the extension of the first main plate along the first elevation direction, the first central portion extends along the first elevation direction between a first upper central edge and a first lower central edge, the first lower central edge extends opposite the first upper main edge, and
• a first structural core extending along the first elevation direction, the first main support is attached to the first structural core and the first ancillary support is attached to the first structural core,
• the second suspension system comprises:
• a second main support, the second main support has a second main plate, the second main plate extends in a second elevation direction between a second upper main edge and a second lower main edge, the second main plate extends along a second transverse direction between a second main edge on the first side and a second main edge on the second side, the second transverse direction is perpendicular to the second elevation direction,
• a second ancillary support, the second ancillary support has a second ancillary plate, the second ancillary plate has a second central portion extending in the extension of the second main plate along the second elevation direction, the second central portion extends along the second elevation direction between a second upper central edge and a second lower central edge, the second lower central edge extends opposite the second upper main edge, and
• a second structural core extending along the second elevation direction, the second main support is attached to the second structural core and the second ancillary support is attached to the second structural core,
• wherein the assembly:
• the second main support is geometrically identical to the second main support, and
• the second ancillary support geometrically differs from the first ancillary support.