Lumbar support system

摘要

A lumbar support system for a seat backrest having a fixed frame includes a lumbar support coupled to the fixed frame that is movable from a first position to a second position and a motor for moving the lumbar support. A threaded member is operatively associated with the motor such that the motor rotates the threaded member about an axis. A traveling member is operatively associated with the threaded member such that rotation of the threaded member translates the traveling member along the threaded member. The system further includes a flexible cable having a first end and a second end. The first end is coupled to the traveling member for movement therewith and the second end is coupled to the fixed frame such that translation of the traveling member in response to rotation of the threaded member moves the lumbar support element from the first position to 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 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.