LONGITUDINAL ADJUSTMENT DEVICE FOR A MOTOR VEHICLE SEAT, COMPRISING TWO PAIRS OF RAILS

• US 20130320179A1
• Filed: 11/03/2011
• Published: 12/05/2013
• Est. Priority Date: 12/30/2010
• Status: Active Grant

• Current Assignee: Keiper Seating Mechanisms Company Limited
• Original Assignee: C ROB Hammerstein GmbH & Company KG (Johnson Controls International plc)
• Inventors: Beneker, Wilfried, Teer, Antal, Becker, Burckhard
• Granted Patent: US 9,676,298 B2
• Time in Patent Office: Days
• US Class Current: 248/429
• CPC Class Codes: B60N 2/02246 Electric motors therefor
• CPC Class Codes: B60N 2/02258 characterised by the mounting of the electric motor for adjusting the seat
• CPC Class Codes: B60N 2/074 rotated about the transversal axis
• CPC Class Codes: B60N 2/0843 about a longitudinal axis
• CPC Class Codes: B60N 2/0881 Activation of the latches by the control mechanism
• CPC Class Codes: B60N 2/0887 with synchronised movements

Abstract

A longitudinal adjustment device for a motor vehicle seat has two pairs of rails. It includes a locking device for each pair of rails. It has a common actuating unit for the two locking devices, the unit interacting with both locking devices and includes a handle. The actuating unit has an electric drive motor, a gearbox which is connected to the electric drive motor, an actuator and preferably a setting unit.

Claims

1. A longitudinal adjustment device for a motor vehicle seat, comprising:

two pairs of rails;

one locking device for each pair of rails; and

a common actuating unit for the two locking devices that cooperates with the two locking devices and has a handling means

wherein the actuating unit comprises an electric drive motor, a gear unit connected to this electric drive motor, and an actuator.

2. The longitudinal adjustment device according to claim 1, wherein the actuating unit exerts a pull.

3. The longitudinal adjustment device according to claim 1, wherein the actuating unit is mechanically retained and fastened only with the two locking devices, and not via further retaining means.

4. The longitudinal adjustment device according to claim 1, wherein in the case of pairs of rails installed in a vehicle not horizontally, but at an angle to the x-y plane, and thus to the horizontal plane, a spring acting in the longitudinal direction of the pair of rails is provided which substantially compensates the proportion of the load in the longitudinal direction due to a passenger with normal weight.

5. The longitudinal adjustment device according to claim 1, wherein the locking devices each comprise a disengagement lever pivotable about a disengagement lever axis, and the disengagement lever axis is disposed substantially at right angles to the pulling direction of the actuating unit.

6. The longitudinal adjustment device according to claim 1, wherein the locking devices each comprise a disengagement lever, and the disengagement lever, in the locked state of the locking device, includes with an actuating device of the actuating unit an angle which is between +60 and −

60°

.

7. The longitudinal adjustment device according to claim 6, wherein the actuating unit is hinged to at least one disengagement lever over a distance of at least 10 mm, whereby an anti-rotation protection is created.

8. The longitudinal adjustment device according to claim 1, wherein the electric drive motor is connected to a power source via a button, and the button forms the handling means, and the button is actuated for so long as the adjustment of the position of the longitudinal adjustment device is desired.

9. The longitudinal adjustment device according to claim 1, wherein the electric drive motor is disposed closer to one pair of rails than to the other pair of rails, and the distance to the other pair of rails being greater than ⅔

of the distance of the two pairs of rails.

10. The longitudinal adjustment device according to claim 6, wherein the disengagement levers of the two seat sides can be actuated counter-directionally.