Device for adjusting position of headrest for vehicle

Patent metadata

Field	Value
Publication number	US-11491902-B2
Application number	US-202117365616-A
Country	US
Kind code	B2
Filing date	Jul 1, 2021
Priority date	Nov 20, 2020
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

A device for adjusting a position of a headrest for a vehicle includes: a stay mounted on a seatback frame; a main frame including a rotation guide hole, inserted into and mounted on the stay, and configured to ascend or descend along the stay; an elevation device mounted on the main frame and the stay, and configured to allow the main frame to ascend or descend along the stay; a rotating frame including a first end portion inserted into the stay and configured to ascend or descend along the stay, and a second end portion extending toward the rotation guide hole of the main frame; a rotating device mounted on the rotating frame and the rotation guide hole of the main frame, and configured to rotate the rotating frame along the rotation guide hole; and a headrest frame assembled to the rotating frame.

First claim

What is claimed is:

1. A device for adjusting a position of a headrest for a vehicle, the device comprising:
a stay mounted on a seatback frame;
a main frame movably mounted on the stay and configured to ascend or descend along the stay, wherein the main frame includes a rotation guide hole;
an elevation device mounted on the main frame and the stay, and configured to allow the main frame to ascend or descend along the stay;
a rotating frame including
a first end portion inserted into the stay and configured to ascend or descend along the stay, and
a second end portion extending toward the rotation guide hole of the main frame;

a rotating device mounted on the rotating frame and the rotation guide hole of the main frame, and configured to rotate the rotating frame along the rotation guide hole; and
a headrest frame assembled to the rotating frame.

2. The device of claim 1 , wherein the elevation device includes:
a rack mounted on one surface of the stay in a vertical direction;
a first motor mounted on the main frame and including an output shaft; and
a first pinion mounted on the output shaft of the first motor and engaged with the rack.

3. The device of claim 1 , wherein the rotating device includes:
a sector gear formed on an inner surface of the rotation guide hole of the main frame;
a second motor mounted on the second end portion of the rotating frame; and
a rotating gear body mounted on an output shaft of the second motor, and configured to be rotatably inserted into the rotation guide hole and, simultaneously, to engage with the sector gear.

4. The device of claim 3 , wherein the rotating gear body includes:
a second pinion engaged with the sector gear;
an upper stopper plate attached on an upper surface of the second pinion and provided in close contact with an outer circumferential surface of an upper side of the rotation guide hole; and
a lower stopper plate attached to a lower surface of the second pinion and provided in close contact with an outer circumferential surface of a lower side of the rotation guide hole.

5. The device of claim 1 , wherein the rotating frame includes:
a first vertical bar inserted into the stay and configured to ascend or descend;
a second vertical bar extending toward the rotation guide hole of the main frame; and
a horizontal bar connected between the first vertical bar and the second vertical bar, assembled with the headrest frame, and integrally formed in an inverted “U” shape.

6. The device of claim 5 , wherein the headrest frame comprises:
a front frame;
a rear frame; and
assembly grooves formed on inner surfaces of the front frame and the rear frame, and configured to receive and engage with the horizontal bar,
wherein the front frame and the rear frame are mutually assembled.

7. The device of claim 5 , further comprising an elevation guide hole formed in the stay, and configured to receive the first vertical bar of the rotating frame and to allow the first vertical bar to ascend or descend.

8. The device of claim 5 , wherein the rotating frame is provided in a hollow structure, and is configured to receive a wiring extending from an inside of the stay and allow the wiring to extend toward a second motor.

9. The device of claim 8 , further comprising a wiring branch hole formed in the rotating frame and configured to allow the wiring to branch to be connected to a first motor.

10. The device of claim 1 , wherein the headrest frame is covered with a headrest pad, the headrest pad including:
a first pad configured to support a head of a passenger during driving; and
a second pad having a thickness that is thinner than a thickness of the first pad and configured to support the head of the passenger while the passenger takes a rest.

11. The device of claim 1 , wherein, when an electric seat is in a normal position and a gear shift lever is located at a rear (R), neutral (N), or driving (D) stage, a controller is configured to select an operation mode and control the headrest in the operation mode, wherein in the operation mode, a first pad is located on a front side of the headrest and, simultaneously, a second pad is located on a rear surface of the headrest.

12. The device of claim 1 , wherein when an electric seat is in a relaxation position and a gear shift lever is located at a P stage, a controller is configured to select a rest mode and control the headrest in the rest mode,
wherein in the rest mode, the headrest is rotated at an angle of 180 degrees, a second pad is located on a front surface of the headrest and, simultaneously, a first pad is located on a rear surface of the headrest.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Shin Seong Hyeon
• Lee Sang Hyun
• Yun Seong Mun
• Na Seon Chae
• Choi Byung Yong
• Kim Sang Ho
• Kim Hyeong Jong

Classifications

• B60N2002/022

  the seat or seat part turning about or moving along a vertical axis · CPC title

• B60N2/64

  Back-rests {or cushions (B60N2/2222 takes precedence)} · CPC title

• B60N2/865 Primary

  providing a fore-and-aft movement with respect to the occupant's head · CPC title

• B60N2/853

  characterised by their adjusting mechanisms, e.g. electric motors · CPC title

• A47C7/383

  Detachable or loose head- or neck-supports, e.g. horse-shoe shaped · CPC title