Abstract: A seat structure comprises a base (1), a back and a bolster (2) located on at least one edge of the base or back. The bolster (2) includes an upholstered cover (3) and a support structure (4) for controlling the position of the upholstered cover (3). The support structure (4) comprises: a support member (11) pivotally mounted for pivotal movement between a raised position in which the support member (11) supports the upholstered cover (3) in a raised state, and a lowered position in which the upholstered cover (3) is no longer supported in the raised state, a first strut member (14) pivotally connected to the support member (11) and a second strut member (16) pivotally connected to the first strut member (14) to form with the first strut member (14) an over-centre strut (13) which, when in its over-centre configuration, holds the support member in its raised state.

Abstract: The invention relates to a headrest (100) for a vehicle seat, comprising a fixed part (110) for attachment in a vehicle seat and at least a first moving part (115), which moving part (115) is movably mounted in amounting (120) in the fixed part so that it can be moved between a first and a second position relative to the fixed part (110). The movement of the moving part (115) from the said first position to the said second position is achieved by means of an inflatable element (130) in the headrest (100), which is inflated by compressed air and thus expands, and the first moving part (115) is maintained in the said second position by means of the inflated inflatable element (130).

Abstract: A seat structure comprises a base (1), a back and a bolster (2) located on at least one edge of the base or back. The bolster (2) includes an upholstered cover (3) and a support structure (4) for controlling the position of the upholstered cover (3). The support structure (4) comprises: a support member (11) pivotally mounted for pivotal movement between a raised position in which the support member (11) supports the upholstered cover (3) in a raised state, and a lowered position in which the upholstered cover (3) is no longer supported in the raised state, a first strut member (14) pivotally connected to the support member (11) and a second strut member (16) pivotally connected to the first strut member (14) to form with the first strut member (14) an over-centre strut (13) which, when in its over-centre configuration, holds the support member in its raised state.