US 11,052,799 B2
Lumbar support for a seat
Bernd Winkelhake, Gifhorn (DE); and Daniel Arnke, Vechelde (DE)
Assigned to component engineering services GmbH, Gifhorn (DE)
Appl. No. 16/610,300
Filed by component engineering services GmbH, Gifhorn (DE)
PCT Filed May 2, 2018, PCT No. PCT/EP2018/061141
§ 371(c)(1), (2) Date Nov. 1, 2019,
PCT Pub. No. WO2018/202679, PCT Pub. Date Nov. 8, 2018.
Claims priority of application No. 10 2017 109 367.2 (DE), filed on May 2, 2017.
Prior Publication US 2020/0079260 A1, Mar. 12, 2020
Int. Cl. B60N 2/66 (2006.01); A47C 7/46 (2006.01)
CPC B60N 2/666 (2015.04) [B60N 2/6671 (2015.04); A47C 7/462 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A lumbar support for a seat defining a back plane, the lumbar support comprising:
a support device having an upper end defining an upper angle of inclination (α) with the back plane and a lower end defining a lower angle of inclination (β) with the back plane and forming a crown of a curvature located in an adjustable position between the upper end and the lower end;
at least one angle adjuster connected to one of the upper end and the lower end of the support device and adapted to vary at least one of the upper angle of inclination (α) and the lower angle of inclination (β) to adjust the position of the crown of the curvature, and
an actuator for adjusting the at least one angle adjuster;
wherein the at least one angle adjuster is connected to the actuator such that a movement generated by the actuator causes a translational and rotational adjustment of the at least one angle adjuster to change at least one of the upper angle of inclination (α) and the lower angle of inclination (β); and
a bearing element for the at least one angle adjuster and a coupling having a first end and a second end, the at least one angle adjuster having a clamping member, the clamping member having a connecting portion and a coupling point, the connecting portion being rotatably and slidably mounted on the bearing element, wherein the first end of the coupling is rotatably connected to the clamping member at the coupling point and the second end of the coupling is rotatably connected to the bearing member, and wherein the actuator engages the connecting portion to cause movement of the clamping member relative to the bearing member to change the at least one of the upper inclination angle (α) and the lower inclination angle (β).