Seat rail pair for longitudinal adjustment of a vehicle seat and energy absorber and locking device, in particular for such a seat rail pair

A motor vehicle seat, which is fastened to a fastening rail (21) of a seat rail pair (2) and can be adjusted in an adjustment direction (x) by adjusting the adjustment element (20), wherein

• a locking device (5′) is provided, for releasably locking the motor vehicle seat, wherein
• an energy absorber element (5) is coupled via a breakaway member (71) in a path introducing the force acting on the vehicle seat (8) into a vehicle structure, for converting crash energy in a vehicle by deforming a deformation member (5), and
• an electrically operable actuator (75) unlocks the locking device (5′) by destroying the breakaway member (71) when the predetermined value of the force acting on the vehicle seat (8) is exceeded, so that the fastening rail (21) can be adjusted relative to the adjustment element (20) in the adjustment direction (x) with deformation of the energy absorber element (5),
• wherein the seat rail pair (2) comprises:
• a guide rail (10) running parallel to the adjustment direction (x) for fastening to a vehicle floor, and
• the fastening rail (21) adjustably guided on the guide rail (10) in the adjustment direction (x) for fastening the motor vehicle seat (8);
• wherein
• the energy absorber element (5) is provided in a path which introduces the force acting on the motor vehicle seat (8) into the vehicle structure, said energy absorber element permitting a movement of the motor vehicle seat in the adjustment direction (x) under plastic deformation when a predetermined value of the force is exceeded;
• and
• an adjustment element (20) for adjusting the motor vehicle seat (8) in the adjustment direction (x) is guided on the guide rail (10) or on the fastening rail (21) and is coupled to the guide rail (10), wherein the fastening rail (21) can be adjusted relative to the adjustment element (20) in the adjustment direction (x) with deformation of the energy absorber element (5) when the predetermined value of the force acting on the motor vehicle seat (8) is exceeded, wherein
• the energy absorber element (5) is coupled into the path introducing the force acting on the motor vehicle seat (8) into the vehicle structure via the locking device (5′), which is unlocked when the predetermined value of the force is exceeded to allow an adjustment of the fastening rail (21) relative to the adjustment element (20) in the adjustment direction (x) with deformation of the energy absorber element (5);
• and wherein
• the energy absorber element (5) comprises:
• a deforming member (51) which predetermines the deformation, and
• the deformation member (5) which is designed as a tubular hollow profile extending in a longitudinal direction (x) and guided displaceably relative to the deforming member (51) in the longitudinal direction (x), wherein
• an opening having a predetermined inner profile is formed in the deforming member (51),
• the deformation member (5) extends through the opening, and
• a displacement of the deformation member (5) relative to the deforming member (51) in the longitudinal direction (x) in the event of a crash causes a deformation of an outer profile of the deformation member (5) by the inner profile of the opening.