Vehicle Seat Lever Backlash Reduction via Segmented Abut Bosses

The side cover is segmented with multiple abut bosses (first abut boss and second abut boss) positioned at different locations. The operation lever is segmented with multiple abut ribs (first, second, and third abut ribs) at different positions along its length. This segmentation allows different parts of the lever to engage with different bosses during operation, enabling a longer lever to operate without the leading end contacting the side cover.

The abut bosses on the side cover act as intermediaries between the operation lever and the side cover structure. By providing multiple bosses at strategically positioned locations, the lever can transfer forces and movements through these intermediary points rather than having the leading end directly contact the side cover, thus preventing noise and wear.

Instead of forming a rib in the side cover (which would increase complexity), the invention inverts the approach by forming abut ribs on the operation lever itself. The lever contains its own guiding ribs that engage with the simpler boss structures on the side cover, thereby reducing overall structural complexity while still achieving smooth operation and reduced backlash.

The abut ribs are locally positioned on the operation lever at specific locations corresponding to the abut bosses. This local quality approach provides the necessary guidance and backlash reduction only where needed, rather than requiring complex overall restructuring of the side cover. The multi-rib configuration provides localized contact points that ensure smooth operation throughout the lever's range of motion.