Multiple turn mechanism for manual lumbar support adjustment

An actuator for an ergonomic support for a seat comprising:

• a spring having a first extension and a second extension, said spring being capable of moving from a first diameter to a second diameter when a force is applied to said first and second extensions;
• a guide surface, said guide surface being dimensioned to receive said spring on an outer surface thereof such that said spring may rotate relative to said guide surface and said guide surface being dimensioned to lockingly engage said spring when said spring is in said second diameter;
• a drive shaft disposed to engage said first extension of said spring such that when said drive shaft is rotated in a first direction, said spring is maintained in said first diameter;
• a gear being in operative engagement with said drive shaft;
• said gear having a channel, which is located centrally with respect to a top and bottom surface of said gear, wherein said channel functions as a mount for a traction cable wire;
• said gear having a notch for receiving installation of an end stop of the traction cable wire;
• wherein said first extension of said spring and the drive shaft are situated such that when said drive shaft is not rotated in said first direction and when a force is applied to said gear by said traction cable wire said first extension of said spring is moved such that said spring is moved to said second diameter;
• and
• a housing, said housing encapsulating said drive shaft, said spring, said guide surface and said gear;
• wherein said traction cable wire is used to actuate an ergonomic device.

A traction cable brake for an ergonomic device adapted for maintaining a position against a load, the load presenting to the brake as traction on a traction cable;

• said traction cable brake comprising:
• a gear having a channel, which is located centrally with respect to a top and bottom surface of said gear, wherein said channel functions as a mount for seating a traction cable wire, said wire, when under a load, biasing said gear in a first rotational direction;
• said gear having a notch for receiving installation of an end stop of the traction cable wire;
• a housing, said gear being mounted in said housing;
• a lever mount, said lever mount being adapted for seating a lever;
• an drive shaft between said lever mount and said gear, said drive shaft transferring a force on said lever mount to turn said gear in a said first rotational direction or in a second rotational direction;
• a coil spring, said coil spring having a first tab and second tab and said coil spring having an unloaded diameter and a loaded diameter;
• a guide surface on said drive shaft, said guide surface being dimensioned to receive said coil spring, said guide surface having an outer surface;
• an inner surface on said housing;
• wherein said drive shaft has a circumferential shoulder having a first face and a second face, the first and second faces being radially disposed;
• a third and fourth face, said third and fourth face being in operative engagement with said gear;
• wherein said first, second, third and fourth faces are situated with respect to said first and second extensions such that when a moment is not applied to said drive shaft said first, second, third and fourth faces are moved such that said spring is moved to a first diameter, and such that when said moment is applied to said drive shaft said first, second, third and fourth faces are moved such that said spring is moved to a second diameter;
• wherein said spring frictionally engages with said inner surface when said spring is moved to said first diameter, and wherein said spring disengages with said inner surface when said spring is moved to said second diameter;
• wherein said gear is prevented from rotating when said spring is engaged with said inner surface;
• and
• wherein, said wire is used to actuate an ergonomic device.