Abstract: An automotive seat rail includes a rail and an engaging structure. The engaging structure includes a fixing frame, an engaging member and an elastic member. The fixing frame includes a fixing portion and an abutting portion fixed to and abutting an inner rail respectively. The engaging member includes an engaging section, a base section, and a stress section sequentially coupled to each other and bent with respect to each other. The base section is pivotally coupled to the fixing frame, and the engaging section is engaged between the inner and outer rails. When the stress section is controlled by an external force, the engaging section is driven to release the engagement between the inner rail and the outer rail, so as to ensure the accurate action of the engaging structure and allow the engaging member to have better structural strength, smoother control, and more accurate engagement and disengagement effects.

Abstract: An electric drive mechanism of a seat rail includes a front frame, a rear frame, a gear assembly, a lead screw and a bumper. The front frame and rear frame are separated from each other and fixed to an outer rail of a slide rail; the lead screw is spanned across the front frame and rear frame; the gear assembly driven by a driving device is fixed to an inner rail of the slide rail and engaged with the lead screw; the bumper is installed at the rear frame provide a buffering effect between the gear assembly and the rear frame, so as to prevent the production of abnormal sounds caused by colliding the gear assembly with the rear frame directly.