Seat cushion extension device of fold and dive seat

Patent metadata

Field	Value
Publication number	US-12291130-B2
Application number	US-202218079337-A
Country	US
Kind code	B2
Filing date	Dec 12, 2022
Priority date	Sep 6, 2022
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

The present disclosure provides a seat cushion extension device for a fold-and-dive seat. The seat cushion extension device may include a pair of seat cushion side frames arranged at a predetermined interval, a seatback frame rotatably connected to the pair of seat cushion side frames and having a guide pin formed on an outer surface thereof, a seat cushion frame, a pair of links rotatably connected between the pair of seat cushion side frames and a front end of the seat cushion frame, and a pair of extension frames. Each of the pair of extension frames may have a front end connected to the seat cushion frame, and a rear end formed with a guide hole, into which a guide pin may be inserted. The seat cushion extension device may facilitate a forward extension of a seat cushion regardless of a position of a seatback of the fold-and-dive seat.

First claim

What is claimed is:

1. A seat cushion extension device for a fold-and-dive seat, the seat cushion extension device comprising:
a pair of seat cushion side frames spaced apart from each other at a first distance;
a seatback frame rotatably connected to the pair of seat cushion side frames and having a pair of guide pins each disposed on a respective outer lateral surface of the seatback frame;
a seat cushion frame having a front end;
a pair of links each rotatably connected between a respective one of the pair of seat cushion side frames and the front end of the seat cushion frame; and
a pair of extension frames each having:
a front end connected to the seat cushion frame, and
a rear end with a guide hole for receiving a respective one of the pair of guide pins.

2. The seat cushion extension device for the fold-and-dive seat of claim 1 , wherein each of the pair of guide pins is inserted into the guide hole of a respective one of the pair of extension frames, and wherein each of the pair of guide pins is formed to protrude from a gap maintenance bracket mounted on a respective outer lateral surface of the seatback frame.

3. The seat cushion extension device for the fold-and-dive seat of claim 1 , wherein the guide hole of each extension frame of the pair of extension frames is formed to be inclined at an upper rear end of the each extension frame.

4. The seat cushion extension device for the fold-and-dive seat of claim 1 , wherein the guide hole of each extension frame of the pair of extension frames is formed as an elongated hole inclined upward toward a rear of the seat cushion extension device such that the seat cushion frame and the each extension frame extend forward while the each extension frame has a rising inclination toward the seat cushion frame.

5. The seat cushion extension device for the fold-and-dive seat of claim 1 , wherein a lower end of each link of the pair of links is hinge-fastened to a front end of a respective one of the pair of seat cushion side frames, and wherein an upper end of the each link is hinge-fastened to a respective one of a pair of support links formed on a bottom surface of the front end of the seat cushion frame.

6. The seat cushion extension device for the fold-and-dive seat of claim 1 , wherein each link of the pair of links is arranged to be inclined upward at a predetermined angle toward a rear of the seat cushion extension device while the seat cushion frame and the pair of extension frames are not in a forward extension position.

7. The seat cushion extension device for the fold-and-dive seat of claim 5 , wherein the each link pushes up the respective one of the pair of support links of the seat cushion frame and is rotated forward to be arranged to stand upright while the seat cushion frame and the pair of extension frames are in a forward extension position.

8. The seat cushion extension device for the fold-and-dive seat of claim 5 , wherein the each link is rotated forward, upon a dive operation of the seat cushion frame and a respective one of the pair of extension frames, to pull down the respective one of the pair of support links and be arranged to be inclined upward at a predetermined angle toward a front of the seat cushion extension device.

9. The seat cushion extension device for the fold-and-dive seat of claim 1 , further comprising:
a first motor connected to at least one of the pair of links for a rotation operation of the at least one of the pair of links; and
a second motor for a rotation operation of the seatback frame.

10. The seat cushion extension device for the fold-and-dive seat of claim 9 , wherein the first motor comprises a lead screw that is hinge-connected to a fixing bracket mounted on the at least one of the pair of links, wherein the lead screw is a gearbox output shaft of the first motor.

11. The seat cushion extension device for the fold-and-dive seat of claim 9 , wherein the second motor comprises a gearbox fastened to a rotational shaft rotatably connecting the seatback frame to the pair of seat cushion side frames so as to apply a rotational force.

12. The seat cushion extension device for the fold-and-dive seat of claim 9 , further comprising a controller configured to, at any given time, drive only:
the first motor for an extension operation of the seat cushion frame, or
the second motor for a reclining operation of the seatback frame.

13. The seat cushion extension device for the fold-and-dive seat of claim 9 , further comprising a controller configured to simultaneously drive the first motor and the second motor for implementing a fold-and-dive operation and a relaxation posture.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Keum Dong Hoon
• Park Sang Do
• Lee Sang Soo
• Lee Hoon Bok
• Kim Mu Young
• Jung Chan Ho
• Lee Da Eun

Classifications

• B60N2/12

  slidable and tiltable · CPC title

• B60N2/3065

  in a longitudinal-vertical plane · CPC title

• B60N2/1821

  Combination of Rods and slides · CPC title

• B60N2/1625 Primary

  Combination of rods and slides · CPC title

• B60N2/36

  into a loading platform {(B60N2/065 takes precedence)} · CPC title