Granted Patent B2

US 12,643,449 · App. 18/439,811 · Granted Jun 2, 2026

Inventors: Takashi Ogiso (Kariya, JP); Hidehiko Fujioka (Kariya, JP); Guyue Sun (Kariya, JP)

Assignee: AISIN CORPORATION

B60N2/914B60N2/99

Abstract

Claims (51)

1 . A seat drive device that is built in a seat including a central portion and a side support located outside the central portion in a width direction, and drives the side support, the seat drive device comprising:

a base fixed to the seat;

a paddle that is rotatably supported with respect to the base and configured to rotate in an unfolding direction to displace the side support toward a seating region of a user; and

an air bag disposed between the base and the paddle, wherein the air bag is configured to rotate the paddle in the unfolding direction when it is expanded by an air supply,

wherein the paddle includes a pressing portion that is configured to press the side support from inside upon rotation in the unfolding direction, and

an arm that is rotatably supported with respect to the base and extends toward the pressing portion,

wherein a rotation axis of the paddle is located in a central portion of the seat,

wherein the arm is curved toward a retraction direction that is a direction opposite to the unfolding direction, and

wherein the seat drive device includes a fully retracted position, and the curved portion of the arm is configured to penetrate the base when the seat drive device is in the fully retracted position.

2 . The seat drive device according to claim 1 ,

wherein the arm is curved such that an intermediate portion of the arm in a longitudinal direction is located in the retraction direction relative to both end portions of the arm in the longitudinal direction.

3 . The seat drive device according to claim 1 ,

wherein the air bag includes a bag body that is configured to expand with supply of air and is configured to contract with discharge of air, and an extension portion extending from the bag body toward a rotation axis of the paddle, and

wherein the extension portion is locked to the base.

4 . The seat drive device according to claim 3 ,

wherein the extension portion is locked to the base, and

wherein the extension portion is configured to be movable in a direction intersecting the rotation axis of the paddle with respect to the base when the extension portion is unlocked.

5 . The seat drive device according to claim 4 ,

wherein the bag body includes a first bag body and a second bag body, and

wherein when second bag body that is disposed between the first bag body and the paddle, and the second bag body is configured to expand and contract together with the first bag body.

6 . The seat drive device according to claim 1 ,

wherein the paddle includes the arm and the pressing portion configured separately.

7 . The seat drive device according to claim 1 ,

wherein the base includes two guide walls sandwiching the arm in a direction in which the rotation axis of the paddle extends.

8 . The seat drive device according to claim 3 ,

wherein the arm includes two arms disposed with a space therebetween in a direction in which the rotation axis of the paddle extends, and

wherein the extension portion of the air bag is locked to the base between the two arms.

9 . The seat drive device according to claim 8 ,

wherein the curved portion of the arm is configured to penetrate the base in the retraction direction when the seat drive device is in the fully retracted position,

wherein the extension portion is locked to the base in a state where a distal end of the extension portion penetrates the base when the seat drive device is in the fully retracted position, and

wherein when the seat is in the fully retracted position and is viewed in cross-section, a portion of the two arms hides the distal end of the extension portion of the air bag.

10 . The seat drive device according to claim 2 ,

wherein the air bag includes a bag body that is configured to expand with supply of air and is configured to contract with discharge of air, and an extension portion extending from the bag body toward a rotation axis of the paddle, and

wherein the extension portion is locked to the base.

11 . The seat drive device according to claim 10 ,

wherein the extension portion is locked to the base, and

wherein the extension portion is configured to be movable in a direction intersecting the rotation axis of the paddle with respect to the base when the extension portion is unlocked.

12 . The seat drive device according to claim 11 ,

wherein the bag body includes a first bag body and a second bag body, and

wherein when second bag body is disposed between the first bag body and the paddle, and the second bag body is configured to expand and contract together with the first bag body.

13 . The seat drive device according to claim 10 ,

wherein the arm includes two arms disposed with a space therebetween in a direction in which the rotation axis of the paddle extends, and

wherein the extension portion of the air bag is locked to the base between the two arms.

14 . The seat drive device according to claim 13 ,

wherein the curved portion of the arm is configured to penetrate the base in the retraction direction when the seat drive device is in the fully retracted position,

wherein the extension portion is locked to the base in a state where a distal end of the extension portion penetrates the base when the seat drive device is in the fully retracted position, and

wherein when the seat is in the fully retracted position and is viewed in cross-section, a portion of the two arms hides the distal end of the extension portion of the air bag.

15 . The seat drive device according to claim 2 ,

wherein the paddle includes the arm and the pressing portion configured separately.

16 . The seat drive device according to claim 2 ,

wherein the base includes two guide walls sandwiching the arm in a direction in which the rotation axis of the paddle extends.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (14)