Height adjusting apparatus for vehicle seats

A height adjusting apparatus for vehicle seats, comprising:

• a seat bracket configured to mount a seat to a vehicle;
• a base frame configured to be slidably mounted to the seat bracket;
• seat side frames provided on both lateral sides of a seat part of the seat to support the seat part;
• a front link pivotally coupling front portion of the base frame and front portion of the seat side frame;
• at least a rear link pivotally coupling rear portion of the base frame and rear portion of the seat side frame;
• a support rod pivotally coupling rear portions of both seat side frames;
• a pinion gear provided on one of the seat side frames to adjust a height of the seat part;
• a rack gear link wherein a first end of the rack gear link engages with an upper portion of the pinion gear, and a second end of the rack gear link is co-axially coupled to a lower portion of the front link which is coupled to the base frame;
• and
• a support pin provided on the seat side frame, the support pin placed above the rack gear in vertical direction and between lower end portion of the front link and the pinion gear in horizontal direction, and maintaining engagement of the rack gear with the pinion gear.