Vehicle seat

A vehicle seat in combination with a floor of vehicle, comprising:

• a seat cushion frame including a first lateral frame member and a second lateral frame member, wherein said first lateral frame member has a forward portion facing forwardly of the vehicle, while said second lateral frame member has a backward portion facing backwardly of the vehicle,
• a drive pinion rotatably provided to said first lateral frame member, said drive pinion being operatively connected with a drive source;
• a first front link element of sector shape having:
• a lower end portion pivotally secured on said floor of vehicle;
• and an upper widened end portion so formed to diverge from said lower end portion, said upper widened end portion being pivotally connected with said forward portion of said first lateral frame member;
• said first front link element having an arcuate gear region defined in said upper widened end portion thereof, said arcuate gear region being in meshed engagement with said drive pinion and so arranged as to face backwardly of the seat;
• said drive pinion being disposed backward of said arcuate gear region;
• a second front link element which is at the upper end portion thereof pivotally connected with said forward portion of said second lateral frame member, while being at the lower end portion thereof pivotally fixed on said floor of vehicle;
• said first and second front link elements being interlocked via a connecting element so as to be movable vertically in a synchronized way;
• a first rear link element which is at the upper end portion thereof pivotally connected with said backward portion of said first lateral frame member, while being at the lower end portion thereof pivotally fixed on said floor of vehicle;
• and
• a second rear link element which is at the upper end portion thereof pivotally connected with said backward portion of said second lateral frame member, while being at the lower end portion thereof pivotally fixed on said floor of vehicle;
• wherein said first and second rear link elements are prone to deformation by an excessive great load applied backwardly and downwardly to the seat in case of rear-end collision, thereby absorbing a corresponding excessive great impact.