VEHICLE SEAT HEADREST ASSEMBLY HAVING VERTICAL AND LONGITUDINAL ADJUSTMENT

摘要

A vehicle seat headrest assembly (20) includes a headrest (21) having a rear headrest portion (28) with a housing (29) mounted on vertical posts (26) for vertical movement and also includes a front headrest portion (30) having a housing (31) movable longitudinally in forward and rearward directions by a support linkage (46) under the control of a rack and pinion mechanism (62). A first helical spring locking clamp (44) permits upward adjusting movement of the headrest but normally prevents downward movement, and a second helical spring locking clamp (72) permits forward movement of the front headrest portion housing (29) while normally preventing rearward movement. An actuator (36) releases the first and second helical spring locking clamps (44 and 72) to permit downward movement of the headrest (21) and rearward adjustment of the front headrest portion (30) housing (31).