Sliding sleeve and headrest arrangement

A sliding sleeve for fixing in a securing body for a vehicle seat headrest, the sliding sleeve comprising:

• a sleeve body with an exterior surface, said sleeve body extending along a longitudinal axis, said sleeve body having a coupling section with first and second longitudinally aligned coupling faces,
• wherein each coupling face has an inner end, an opposite outer end, an inner surface and an opposite outer surface,
• wherein said outer surfaces and said outer ends are adapted to bear against a securing support,
• wherein said inner ends are connected to said exterior surface,
• wherein said outer ends radially extend from said inner ends,
• wherein inner surfaces and said exterior surface define an indentation between them,
• wherein said indentation is only accessible from an outer sleeve side,
• wherein an outer surface of the at least one flexible coupling face has a convex shape along the longitudinal axis to radially secure the sleeve body against the securing support.

A headrest arrangement, in particular for a seat, comprising:

• two headrest rods which are spaced apart from one another in parallel;
• a headrest body which is fastened to the headrest rods;
• two securing supports which are arrangeable and fixable in a frame of a backrest of the seat;
• and
• sliding sleeves, each of the sliding sleeves being arranged in a respective one of the securing supports and each of the sliding sleeves comprising a sleeve body with an exterior surface, said sleeve body extending along a longitudinal axis, said sleeve body having a coupling section with first and second longitudinally aligned coupling faces,
• wherein each coupling face has an inner end, an opposite outer end, an inner surface and an opposite outer surface,
• wherein said outer surfaces and said outer ends are adapted to bear against one of said securing supports,
• wherein said inner ends are connected to said generally cylindrical exterior surface,
• wherein said outer ends radially extend from said inner ends,
• wherein inner surfaces and said exterior surface define a generally wedge-shaped opening between them,
• wherein said opening is only accessible from an outer sleeve side,
• wherein outer surfaces of said coupling faces each have a convex shape along the longitudinal axis to radially secure the sleeve body against the securing support.