Device for adjusting angle of seatback for vehicles

Patent metadata

Field	Value
Publication number	US-12447873-B2
Application number	US-202318536506-A
Country	US
Kind code	B2
Filing date	Dec 12, 2023
Priority date	Dec 13, 2022
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

Disclosed is a device for adjusting an angle of a seatback for vehicles. The device includes a seat cushion unit including a locking part, a seatback unit rotatably connected to the seat cushion unit, and a link unit connecting the seat cushion unit to the seatback unit. The link unit includes an upper link part including an end fixed to the seat cushion unit to function as a rotation center axis and another end inserted into a back slot portion formed in the seatback unit, a lower link part including an end fixed to the seatback unit and another end inserted into a cushion slot portion formed in the seat cushion unit to be engaged with the locking part, and a joint part to which the upper and lower link parts are coupled. The seatback unit is rotated forward or backward by rotation of the upper and lower link parts.

First claim

What is claimed is:

1. A device for adjusting an angle of a seatback, the device comprising:
a seat cushion comprising a locking part;
a seatback rotatably connected to the seat cushion; and
a link connecting the seat cushion to the seatback,
wherein the link comprises:
an upper link part comprising a first end fixed to the seat cushion to function as a rotation center axis and a second end configured to be inserted into a back slot portion formed in the seatback;
a lower link part comprising a third end fixed to the seatback and a fourth end configured to be inserted into a cushion slot portion formed in the seat cushion to be engaged with the locking part; and
a joint part configured to allow the upper link part and the lower link part to be coupled thereto, and
wherein the seatback is configured to be rotated forward or backward by rotation of the upper link part and the lower link part.

2. The device of claim 1 , wherein the upper link part comprises:
an upper link comprising the first end fixed to the seat cushion and the second end formed to be rotatable about the first end of the upper link; and
an upper slide link connected to the second end of the upper link and configured to be inserted into the back slot portion so as to be moved along the back slot portion while being rotated along with rotation of the upper link, and
wherein the lower link part comprises:
a lower link comprising the third end fixed to the seatback and the fourth end about which the third end of the lower link is rotated; and
a lower slide link connected to the fourth end of the lower link and configured to be inserted into the cushion slot portion so as to be moved along the cushion slot portion when unlocked from the locking part.

3. The device of claim 2 , wherein, when the seatback is rotated forward, the seatback is additionally rotated about the third end of the lower link simultaneously with rotation of the upper link, the upper slide link moves to an end of the back slot portion close to the seat cushion, and the lower slide link moves to an end of the cushion slot portion close to the seatback.

4. The device of claim 2 , wherein, when the seatback is rotated backward, the seatback is additionally rotated about the third end of the lower link simultaneously with rotation of the upper link, the upper slide link moves to another end of the back slot portion far from the seat cushion, and the lower slide link moves to another end of the cushion slot portion far from the seatback.

5. The device of claim 2 , wherein the locking part comprises:
a locking bracket located in the seat cushion to be engaged with the lower slide link; and
a locking lever located outside the seat cushion to be connected to the locking bracket via a cable.

6. The device of claim 5 , wherein, when the locking lever is operated and the seatback is rotated forward about the first end of the upper link, the second end of the upper link is rotated upward about the first end of the upper link, and the lower link receives rotational force from the upper link through the joint part so that the third end of the lower link is rotated upward simultaneously with the upper link.

7. The device of claim 6 , wherein the upper slide link is located at an end of the back slot portion, and the lower slide link is located at an end of the cushion slot portion.

8. The device of claim 5 , wherein, when the locking lever is operated and the seatback is rotated backward about the first end of the upper link, the second end of the upper link is rotated downward about the first end of the upper link, and the lower link receives rotational force from the upper link through the joint part so that the third end of the lower link is rotated downward simultaneously with the upper link.

9. The device of claim 8 , wherein the upper slide link is located at another end of the back slot portion, and the lower slide link is located at another end of the cushion slot portion.

10. A device for adjusting an angle of a seatback, the device comprising:
a seat cushion comprising a driving unit;
a seatback rotatably connected to the seat cushion; and
a link connecting the seat cushion to the seatback,
wherein the link comprises:
an upper link part comprising a first end fixed to the seat cushion to function as a rotation center axis and a second end configured to be inserted into a back slot portion formed in the seatback;
a lower link part comprising a third end fixed to the seatback and a fourth end configured to be inserted into a cushion slot portion formed in the seat cushion to be engaged with the driving unit; and
a joint part configured to allow the upper link part and the lower link part to be coupled thereto, and
wherein the seatback is configured to be rotated forward or backward by rotation of the upper link part and the lower link part.

11. The device of claim 10 , wherein the upper link part comprises:
an upper link comprising the first end fixed to the seat cushion and the second end formed to be rotatable about the first end of the upper link; and
an upper slide link connected to the second end of the upper link and configured to be inserted into the back slot portion so as to be moved along the back slot portion while being rotated along with rotation of the upper link, and
wherein the lower link part comprises:
a lower link comprising the third end fixed to the seatback and the fourth end about which the third end of the lower link is rotated; and
a lower slide link connected to the fourth end of the lower link and configured to be inserted into the cushion slot portion so as to be moved along the cushion slot portion upon receiving driving force from the driving unit.

12. The device of claim 11 , wherein, when the driving unit applies driving force to the lower slide link so that the lower slide link is moved backward, the second end of the upper link is rotated upward about the first end of the upper link, and the lower link receives rotational force from the upper link through the joint part so that the third end of the lower link is rotated upward simultaneously with the upper link.

13. The device of claim 12 , wherein the upper slide link is located at an end of the back slot portion, the lower slide link is located at an end of the cushion slot portion, and the seatback is rotated forward about the first end of the upper link.

14. The device of claim 11 , wherein, when the driving unit applies driving force to the lower slide link so that the lower slide link is moved forward, the second end of the upper link is rotated downward about the first end of the upper link, and the lower link receives rotational force from the upper link through the joint part so that the third end of the lower link is rotated downward simultaneously with the upper link.

15. The device of claim 14 , wherein the upper slide link is located at another end of the back slot portion, the lower slide link is located at another end of the cushion slot portion, and the seatback is rotated backward about the first end of the upper link.

Assignees

• Hyundai Transys Inc

Inventors

• Cho Jae Hoon

Classifications

• B60N2/206

  to a position in which it can be used as a support for objects, e.g. as a tray · CPC title

• B60N2/2236

  with a transversal pin displaced by a slot or a cam along a predetermined path · 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

• B60N2/2218

  Transversally moving locks · CPC title

• B60N2/22

  the back-rest being adjustable {(B60N2/2878 takes precedence)} · CPC title