| 摘要 |
PROBLEM TO BE SOLVED: To provide a carrier in an adjustment device for a seat having anti-rock features and increased longevity, and a method of forming an outer gear out of hardened steel without the need for heat treatment.SOLUTION: A carrier 120 is formed to have a profiled section underneath a carrier tab 132 such that a load is not applied to a center hub 56 of an outer gear 30 directly underneath the carrier. Instead, the load on the hub of the outer gear is displaced to each side of the carrier tab and occurs under wedges 102. Therefore, with the two points of displaced contact, the seat back is prevented from rocking that occurs with carriers where the load is applied directly underneath the carrier tab or centered between the two wedges. A first profiled surface on an inner circumferential surface 60 also allows a pocket where additional grease may accumulate thereby providing increased longevity. To further provide the anti-rock motion and further increase longevity, the carrier also includes a second profiled portion in some embodiments directly opposite of the first profiled section. |
