Lumbar support system

摘要

An adjustable support system for a seat having a fixed frame includes a support movable from a first position to a second position relative to the frame. An actuator is coupled to only the support and is configured to move the support between the first and second positions. A member is operatively associated with and movable by the actuator. A flexible cable has a first end coupled to the member for travel along the length of the member and a second end coupled to the fixed frame such that movement of the member by the actuator causes the flexible cable to move the support between the first position and the second position.

主权项

1. A lumbar support system for a seat backrest, the system comprising:
a fixed frame; a lumbar support coupled to the fixed frame, the lumbar support movable from a first position to a second position; a motor coupled to the lumbar support; a threaded member operatively engaged with the motor such that the motor rotates the threaded member about an axis; a first traveling member engaged with the threaded member; a second traveling member engaged with the threaded member, wherein rotation of the threaded member translates the first and second traveling members in opposite axial directions along the threaded member; a spacer positioned between the first traveling member and the second traveling member, the spacer configured to slide over the threaded member; a first flexible cable having a first end coupled to the first traveling member for movement therewith, a second end coupled to the fixed frame, and an intermediate portion operatively associated with the lumbar support; and a second flexible cable having a first end coupled to the second traveling member for movement therewith, a second end coupled to the fixed frame, and an intermediate portion operatively associated with the lumbar support, wherein the intermediate portion of the first flexible cable and the intermediate portion of the second flexible cable operate to move the lumbar support from the first position to the second position in response to translation of the first and second traveling members.