Vehicle seating assembly having a lower leg support

Patent metadata

Field	Value
Publication number	US-11148571-B2
Application number	US-201916693659-A
Country	US
Kind code	B2
Filing date	Nov 25, 2019
Priority date	Nov 25, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A vehicle seating assembly includes a seat, a seatback, and a lower leg support. The seat includes a forward end and a rearward end. The seatback is pivotably coupled to the seat. The lower leg support includes an interior surface and an exterior surface. The lower leg support is rotatably coupled to the forward end of the seat and is movable between a stowed position and a deployed position. The stowed position of the lower leg support places the lower leg support in an area below the seat. The stowed position of the lower leg support forms an acute angle with the seat. A linkage assembly is coupled to an underside of the seat and the interior of the lower leg support. The linkage assembly is responsible for transitioning the lower leg support between the stowed position and the deployed position.

First claim

What is claimed is:

1. A vehicle seating assembly, comprising:
a seat having a forward end and a rearward end;
a seatback pivotably coupled to the seat;
a lower leg support having an interior surface and an exterior surface, the lower leg support rotatably coupled to the forward end of the seat, the lower leg support being movable between a stowed position and a deployed position, wherein the stowed position places the lower leg support in an area below the seat, wherein the stowed position of the lower leg support forms an acute angle with the seat, and wherein the lower leg support comprises a proximate end and a distal end, the proximate end of the lower leg support being rotatably coupled to the forward end of the seat;
a motor directly coupled to, and carried by, the interior surface of the lower leg support, wherein the motor is positioned at the proximate end of the lower leg support; and
a linkage assembly coupled to an underside of the seat and the interior surface of the lower leg support, the linkage assembly being responsible for transitioning the lower leg support between the stowed position and the deployed position.

2. The vehicle seating assembly of claim 1 , wherein the linkage assembly comprises:
one or more guide tracks directly coupled to the interior surface of the lower leg support;
a lead screw that is coupled to the lower leg support and is parallel to the one or more guide tracks, the lead screw having a first end and a second end, the first end of the lead screw being directly coupled to the motor such that the motor imparts rotational motion to the lead screw; and
a drive nut engaged with the lead screw such that rotation of the lead screw effects movement of the drive nut along a length of the lead screw, wherein adjustment of the drive nut along the length of the lead screw adjusts a rotational position of the lower leg support.

3. The vehicle seating assembly of claim 2 , wherein the one or more guide tracks comprises a first guide track and a second guide track spaced apart from one another along a horizontal direction of the interior surface of the lower leg support, with the first and second guide tracks being parallel to one another.

4. The vehicle seating assembly of claim 3 , further comprising:
a synchronizing bracket that is coupled to the drive nut such that actuation of the drive nut along the lead screw effects corresponding actuation of the synchronizing bracket along the lead screw.

5. The vehicle seating assembly of claim 4 , wherein the linkage assembly further comprises:
a first linkage arm coupled to a first end of the synchronizing bracket and associated with the first guide track; and
a second linkage arm coupled to a second end of the synchronizing bracket and associated with the second guide track.

6. The vehicle seating assembly of claim 5 , wherein the first and second linkage arms are coupled to a carrier bracket that is mounted to the underside of the seat.

7. The vehicle seating assembly of claim 6 , wherein the carrier bracket pivots about a horizontal axis as the lower leg support is transitioned between the stowed position and the deployed position.

8. The vehicle seating assembly of claim 5 , wherein the first and second linkage arms are extendable from a compressed position to an extended position, and wherein the first and second linkage arms are biased to the extended position.

9. The vehicle seating assembly of claim 1 , wherein the stowed position of the lower leg support positions the drive nut nearest to the distal end of the lower leg support.

10. The vehicle seating assembly of claim 9 , wherein actuation of the drive nut from the distal end of the lower leg support toward the proximate end of the lower leg support transitions the lower leg support from the stowed position toward the deployed position.

11. The vehicle seating assembly of claim 1 , further comprising:
an air bladder assembly having a calf portion and a thigh portion, the calf portion being positioned on the exterior surface of the lower leg support and the thigh portion being positioned on the seat proximate to the forward end, the calf portion and the thigh portion being coupled to a common air supply.

12. A vehicle seating assembly, comprising:
a seat having a forward end and a rearward end;
a seatback pivotably coupled to the seat;
a lower leg support having an interior surface and an exterior surface, the lower leg support rotatably coupled to the forward end of the seat, the lower leg support being movable between a stowed position and a deployed position, wherein the stowed position places the lower leg support in an area below the seat, wherein the stowed position of the lower leg support forms an acute angle with the seat, and wherein the lower leg support comprises a proximate end and a distal end, the proximate end of the lower leg support being rotatably coupled to the forward end of the seat; and
a linkage assembly coupled to an underside of the seat and the interior surface of the lower leg support, the linkage assembly being responsible for transitioning the lower leg support between the stowed position and the deployed position, the linkage assembly comprising:
a first guide track and a second guide track spaced apart from one another along a horizontal direction of the interior surface of the lower leg support, with the first and second guide tracks being parallel to one another, the first and second guide tracks being directly coupled to the interior surface of the lower leg support;
a motor directly coupled to, and carried by, the interior surface of the lower leg support, wherein the motor is positioned at the proximate end of the lower leg support;
a lead screw that is coupled to the lower leg support and is parallel to the first and second guide tracks, the lead screw having a first end and a second end, the first end of the lead screw being directly coupled to the motor such that the motor imparts rotational motion to the lead screw;
a drive nut engaged with the lead screw such that rotation of the lead screw effects movement of the drive nut along a length of the lead screw, wherein adjustment of the drive nut along the length of the lead screw adjusts a rotational position of the lower leg support;
a synchronizing bracket that is coupled to the drive nut such that actuation of the drive nut along the lead screw effects corresponding actuation of the synchronizing bracket along the lead screw;
a first linkage arm coupled to a first end of the synchronizing bracket and associated with the first guide track; and
a second linkage arm coupled to a second end of the synchronizing bracket and associated with the second guide track.

13. The vehicle seating assembly of claim 12 , wherein the first and second linkage arms are coupled to a carrier bracket that is mounted to the underside of the seat.

14. The vehicle seating assembly of claim 13 , wherein the carrier bracket pivots about a horizontal axis as the lower leg support is transitioned between the stowed position and the deployed position.

15. The vehicle seating assembly of claim 12 , wherein the first and second linkage arms are extendable from a compressed position to an extended position, and wherein the first and second linkage arms are biased to the extended position.

16. The vehicle seating assembly of claim 12 , wherein the stowed position of the lower leg support positions the drive nut nearest to the distal end of the lower leg support.

17. The vehicle seating assembly of claim 16 , wherein actuation of the drive nut from the distal end of

Assignees

• Ford Global Tech Llc

Inventors

• Line Johnathan Andrew
• Casey Carol Diane
• Hoernke Spencer Robert
• Moua Jimmy
• Boland Brian
• West Sean Bayle
• Preuss Kevin Wayne
• Godin Keith Allen

Classifications

• B60N2002/924

  using electric or hydraulic energy · CPC title

• B60N2/914

  Hydro-pneumatic adjustments of the shape · CPC title

• B60N2/995 Primary

  Lower-leg-rests, e.g. calf-rests · CPC title

• B60N2/933

  rotatable · CPC title

• B60N2/20

  the back-rest being tiltable, e.g. to permit easy access (B60N2/04, B60N2/22 {, B60N2/3002} take precedence) · CPC title