Raising system for vehicle seat

Patent metadata

Field	Value
Publication number	US-10493876-B2
Application number	US-201715721016-A
Country	US
Kind code	B2
Filing date	Sep 29, 2017
Priority date	Sep 29, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A raisable seat for a vehicle, comprising a frame for a seating portion, a rail, a raising mechanism suitable for moving the seating portion frame relative to the rail between a lowered position and a raised position, said raising mechanism comprising on each side of the seat at least one connecting rod, said connecting rod having a rod body with an upper end connected to the frame and a lower end connected to the rail, at least one connecting rod also comprising a protuberance extending from the lower end, the protuberance extending facing the rail, said connecting rod being adapted to deform, in the event of an impact, between a first state in which a gap separates the rail and the protuberance regardless of the position of the seating portion frame between the lowered position and the raised position, and a second state in which the protuberance is in contact at least locally with the rail.

First claim

The invention claimed is:

1. Raisable seat for a motor vehicle, comprising:
a frame for a seating portion,
a longitudinal rail,
a raising mechanism suitable for moving the seating portion frame relative to the longitudinal rail between a lowered position and a raised position, said raising mechanism comprising, on each side of the seat, one connecting rod, said connecting rod having a rod body with an upper end connected to the frame and mounted pivotable on a first pin, and a lower end connected to the longitudinal rail and mounted pivotable on a second pin, wherein:
said connecting rod also comprises a protuberance extending from the lower end, the protuberance extending facing the longitudinal rail and located such that the second pin is located between said protuberance and the first pin,
said connecting rod being adapted to deform, in the event of an impact, between a first state in which a gap separates the longitudinal rail and the protuberance, regardless of the position of the seating portion frame between the lowered position and the raised position, and a second state in which the protuberance is in contact locally with the longitudinal rail.

2. Seat for motor vehicle according to claim 1 , wherein the shape of the protuberance is adapted to enable planar support of the protuberance on the longitudinal rail during contact in the second state.

3. Seat for motor vehicle according to claim 1 , wherein the protuberance extends continuously from the body of the connecting rod with no discontinuity in the material.

4. Seat for motor vehicle according to claim 1 , wherein the protuberance has a shape locally complementary to the shape of the rail.

5. Seat for motor vehicle according to claim 1 , wherein the longitudinal rail comprises a movable profile and a fixed profile, the protuberance comprising a portion facing the fixed profile.

6. Seat for motor vehicle according to claim 5 , wherein:
the movable profile comprises a horizontal upper web and one lateral wing extending vertically downwards from the horizontal upper web,
the fixed profile comprises one horizontal wing extended by a hanging end wall, said hanging end wall facing the lateral wing of the movable profile,
the protuberance extends parallel to and close to the horizontal wing of the fixed profile.

7. Seat for motor vehicle according to claim 5 , wherein the protuberance comprises a first part facing the movable profile and a second part facing the fixed profile.

8. Seat for motor vehicle according to claim 7 , wherein:
the movable profile comprises a horizontal upper web and one lateral wing extending vertically downwards from the horizontal upper web,
the fixed profile comprises one horizontal wing extended by a hanging end wall, said hanging end wall facing a lateral wing of the movable profile,
the protuberance comprises a first portion parallel to and close to the horizontal upper web of the movable profile, a second portion parallel to and close to said lateral wing of the movable profile, and a third portion parallel to and close to the horizontal wing of the fixed profile.

9. Seat for motor vehicle according to claim 8 , the third portion having an extension along the lower end of the body of the connecting rod that is smaller than the first portion and the second portion, the extension of the third portion along the lower end of the body of the connecting rod corresponding to an angular portion around the pin of between 60° and 120°.

10. Seat for motor vehicle according to claim 8 , wherein the end of the third portion has the shape of an arc of a circle.

11. Seat for motor vehicle according to claim 1 , comprising a base atop the longitudinal rail, the raising mechanism being mounted on the base, the lower end of the connecting rod being connected to the base and mounted pivotable on the first pin.

12. Seat for motor vehicle according to claim 1 , wherein the longitudinal rail comprises a movable profile and a fixed profile,
the movable profile comprising a horizontal upper web and one lateral wing extending vertically downwards from the horizontal upper web,
the fixed profile comprising one horizontal wing extended by a hanging end wall, said hanging end wall facing a lateral wing of the movable profile,
the protuberance being formed by a single portion that is both parallel to and close to the lateral wing and parallel to and close to the horizontal wing.

13. Seat for motor vehicle according to claim 1 , wherein the protuberance extends along only a portion of the lower end of the body of the connecting rod.

14. Seat for motor vehicle according to claim 1 , wherein a free end of the protuberance has a shape adapted to maintain a constant gap between said free end and the longitudinal rail during the travel of the connecting rod to move the seat between the lowered position and the raised position, in the first state.

15. Seat for motor vehicle according to claim 1 , wherein the connecting rod is a front connecting rod.

16. Seat for motor vehicle according to claim 15 , comprising a rear connecting rod, the rear connecting rod also comprising a protuberance extending from the lower end of the rear connecting rod, the protuberance extending facing the longitudinal rail.

Assignees

• Faurecia Sieges Dautomobile

Inventors

• Couasnon Christian
• Deschamps Sylvain

Classifications

• B60N2/42781

  mechanical triggering · CPC title

• B60N2/165

  Gear wheel driven mechanism · CPC title

• B60N2/1803

  with independent front and/or rear adjustment · CPC title

• B60N2/4221

  due to impact coming from the front · CPC title

• B60N2/1615

  Parallelogram-like structure · CPC title