Body support structure
A body support structure includes a base, a seat and a backrest, with the backrest connected to the base with a torsion leaf spring. The torsion leaf spring may be configured with a plurality of fingers, and/or one or more flex regions. One or more struts may be connected between the seat or backrest and the base. In another aspect, the seat and/or backrest may be supported with one or more links that provide a counter-intuitive motion. In another aspect, a link may be coupled to a support with a flexible blade.
1. A body support structure comprising:
a base;
a body support component movably mounted on the base, wherein the body support component is moveable relative to the base between an upright position to a reclined position;
at least one strut having a first end coupled to one of the base and the body support component, and a second end moveably coupled to the other of the base and the body support component, wherein the second end is translatable relative to the other of the base and the body support component between an at-rest position and a reclined position, and wherein the second end is laterally moveable between the at-rest position and the reclined position; and
a biasing component biasing the second end toward the at-rest position.
2. A body support structure comprising:
a base;
a body support component movably mounted on the base, wherein the body support component is moveable relative to the base between an upright position to a reclined position;
at least one strut having a first end coupled to one of the base and the body support component, and a second end moveably coupled to the other of the base and the body support component, wherein the second end is translatable relative to the other of the base and the body support component between an at-rest position and a reclined position; wherein the at least one strut comprises a lever coupled to the second end at a first location, wherein the lever is pivotably coupled to the other of the base and the body support component at a second location spaced from the first location; and
a biasing component biasing the second end toward the at-rest position.
3. The body support structure of claim 2 wherein the at least one strut comprises first and second struts each having a first end coupled to one of the base and the body support component, a second end moveably coupled to the other of the base and the body support component, wherein the second ends of the first and second struts are moveable toward and away from each other, and first and second levers coupled to the second ends of the first and second struts respectively at a pair of first locations.
4. The body support structure of claim 3 wherein the first and second levers are coupled with a laterally extending cross member.
5. The body support structure of claim 3 further comprising at least one biasing member biasing the second ends of the first and second struts toward the at rest position.
6. The body support structure of claim 2 wherein the biasing component engages the lever between the first and second locations.
7. The body support structure of claim 6 wherein the biasing component comprises a spring moveable relative to the lever between the first and second locations.
8. The body support structure of claim 7 wherein the spring comprises a compression spring translatable relative to the lever.
9. The body support structure of claim 2 wherein the strut and the lever are integrally formed.
10. The body support structure of claim 1 wherein the biasing component comprises at least one of a compression spring, a leaf spring and/or a tension spring.
11. The body support structure of claim 1 further comprising an adjuster adjustable to vary a biasing force applied by the biasing component.
12. The body support structure of claim 1 further comprising a deformable link connected between the body support component and the base, wherein the deformable link controls the path of movement of the body support component relative to the base.
13. The body support structure of claim 12 wherein the deformable link comprises at least one flex region.
14. A body support structure comprising:
a base;
a body support component movably mounted on the base, wherein the body support component is moveable relative to the base between an upright position to a reclined position;
at least one strut having a first end coupled to one of the base and the body support component, and a second end moveably coupled to the other of the base and the body support component, wherein the second end is moveable relative to the other of the base and the body support component between an at-rest position and a stop position, wherein the second end is laterally moveable, and wherein the at least one strut limits the movement of the body support component relative to the base when the strut is in the stop position; and
a deformable link connected between the body support component and the base, wherein the deformable link controls the path of movement of the body support component relative to the base.
15. The body support structure of claim 14 wherein the second end is translatably coupled to the other of the base and the body support component, wherein the second end is slidable relative to the other of the base and the body support component between the at-rest position and the stop position.
16. The body support structure of claim 15 further comprising a biasing component biasing the second end toward the at-rest position.
17. The body support structure of claim 16 wherein the biasing component comprises at least one of a compression spring, a leaf spring and/or a tension spring.
18. The body support structure of claim 16 further comprising an adjuster adjustable to vary a biasing force applied by the biasing component.
19. The body support structure of claim 14 wherein the at least one strut comprises first and second struts each having a first end coupled to one of the base and the body support component, and a second end moveably coupled to the other of the base and the body support component, wherein the second ends of the first and second struts are moveable toward and away from each other.
20. The body support structure of claim 19 further comprising a biasing member biasing the second ends of the first and second struts toward the at rest position.
21. The body support structure of claim 14 wherein the deformable link comprises at least one flex region.
22. The body support structure of claim 21 wherein the at least one flex region defines an angle between 20 and 60 degrees relative to a principle axis of the deformable link.
23. The body support structure of claim 21 wherein the at least one flex region is a first flex region, and further comprising a second flex region positioned outboard of the first flex region.
24. The body support structure of claim 23 wherein the second flex region is parallel to a principle axis of the deformable link.