SLIDING RAIL HAVING ENHANCED RIGIDITY MODULUS

The present invention relates to a sliding rail for a vehicle seat, and in particular to a sliding rail having an enhanced rigidity modulus. The sliding rail includes an upper rail assembly, a lower rail assembly, and retainers. The upper rail assembly is slidably arranged in a sliding groove in the lower rail assembly through a pair of retainers. First raised ribs and/or steel ball clamping grooves are arranged at intervals on surfaces, in contact with the upper rail assembly and the lower rail assembly, of the retainers. A steel ball is mounted in the steel ball clamping groove. A supporting structure extending backwards in a length direction of the retainers is arranged at a rear end of each of the retainers. When the upper rail assembly slides backwards to the farthest stroke, the supporting structure provides longitudinal auxiliary support for a mid-rear section of the upper rail assembly, the supporting structure is in contact with the lower rail assembly, and a gap is reserved between the supporting structure and the upper rail assembly. According to the present invention, the supporting structure can provide support for the whole upper rail, and can effectively improve the modal of the sliding rail, in particular under bumpy vibration working conditions, thereby improving the overall rigidity of the sliding rail and facilitating reduction of the noise generated by the sliding rail in a vehicle.