UNDER-FRAME FOR A MOTOR VEHICLE SEAT

• US 20120248840A1
• Filed: 03/12/2012
• Published: 10/04/2012
• Est. Priority Date: 03/29/2011
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), C ROB Hammerstein GmbH & Company KG (Johnson Controls International plc)
• Inventors: Becker, Burckhard, Beneker, Wilfried
• Granted Patent: US 9,108,538 B2
• Time in Patent Office: Days
• US Class Current: 297/344.1
• CPC Class Codes: B60N 2/045 Longitudinal adjustment by means of articulated rods supporting the seat, e.g. parallelogram mechanisms B60N2/38 takes precedence
• CPC Class Codes: B60N 2/1615 Parallelogram-like structure
• CPC Class Codes: B60N 2/165 Gear wheel driven mechanism
• CPC Class Codes: B60N 2/167 Ratchet mechanism
• CPC Class Codes: B60N 2/1675 with weight compensating means
• CPC Class Codes: B60N 2/168 and provided with braking systems

Abstract

An under-frame apparatus for a motor vehicle seat may include a basic body, a seat frame adjustable with respect to the basic body between an utmost rear and front positions, a pair of front and rear vibration levers joint-connected to the basic body and the seat frame, respectively, an adjustment arm joint-connected one of the front and rear vibration levers and including a saw teeth engagement part on a free end region thereof, an adjustment device rotatably coupled to the seat frame and engaged to the free end region to adjust a position of the seat frame with respect to the basic body, wherein the adjustment device includes a pinion gear engaged to the adjustment arm and driven by an operation unit, and an elastic member attached to the seat frame and applying a restoring force to the seat frame toward a starting position.

Claims

1. An under-frame apparatus for a motor vehicle seat including:

a basic body;

a seat frame adjustable relatively with respect to the basic body between an utmost rear position and an utmost front position;

a pair of front and rear vibration levers joint-connected to the basic body and the seat frame, respectively;

an adjustment arm joint-connected one of the front and rear vibration levers and including a saw teeth engagement part on a free end region thereof;

an adjustment device rotatably coupled to the seat frame and engaged to the free end region of the adjustment arm so as to adjust a position of the seat frame with respect to the basic body, wherein the adjustment device includes a pinion gear engaged to the adjustment arm and driven by an operation unit; and

an elastic member attached to the seat frame and applying a restoring force to the seat frame toward a starting position

2. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the pinion gear is driven by a driving shaft attached to the pinion gear, the driving shaft being coupled to the operation unit.

3. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the driving shaft has a connection region for arranging the operation unit.

4. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the operation unit includes an operation lever coupled to a motor-type driving unit or a clamping roller free running.

5. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the adjustment arm is connected to a region of the one of the front or rear vibration levers between places where the one of the front or rear vibration levers is joint-connected to the basic body.

6. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the basic body includes two side members arranged to each other at a predetermined distance and the two side members are connected to each other through at least one seat frame cross arm.

7. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the seat frame includes two seat frame side parts arranged to each other at a predetermined distance and the two seat frames side parts are connected to each other through at least one seat frame cross arm.

8. The under-frame apparatus for the motor vehicle seat of claim 7, wherein the front and rear vibration arms are joint-connected to the at least one seat frame cross arm.

9. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the front and rear vibration levers are connected to each other through a support cross arm.

10. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the elastic member is a torsion bar spring fixed to a seat frame cross arm and a seat frame side part.

11. The under-frame apparatus for the motor vehicle seat of claim 10, wherein the torsion bar spring applies the restoring force to the seat frame toward the starting position such that the rear vibration levers progress upwards with respect to the basic body.

12. The under-frame apparatus for the motor vehicle seat of claim 1, wherein the rear vibration levers rotate from the starting position to the respective rotation directions till 75°

, preferably 70°

, and more preferably 65°

.

13. The under-frame apparatus for the motor vehicle seat of claim 6, wherein a receiving member is arranged for fixing a belt to one of side members and/or one of front and rear vibration levers.