Seat assembly having a switch and method of operation

• US 7,976,103 B2
• Filed: 09/23/2008
• Issued: 07/12/2011
• Est. Priority Date: 09/23/2008
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Patrick, Gerald, Gamache, Steve, Veeramachaneni, Suresh
• Primary Examiner(s): McPartlin; Sarah B
• Application Number:
  US12/236,039
• Publication Number:
  US 20100072772A1
• Time in Patent Office: 1,022 Days
• Field of Search: 297/378.1, 297/378.12, 297/362.11, 297/362.12
• US Class Current: 297/362.11
• 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 2/20 the back-rest being tiltable, e.g. to permit easy access B60N2/04, B60N2/22 , B60N2/3002 take precedence
• CPC Class Codes: B60N 2/225 by cycloidal or planetary mechanisms
• CPC Class Codes: B60N 2205/50 Interlocking shaft arrangements transmitting movement between hinge mechanisms on both sides of a seat

Abstract

A seat assembly and a method of control. The seat assembly includes a power recliner assembly that allows a seat back to pivot with respect to a seat bottom. The power recliner assembly includes a motor for rotating a recliner mechanism. A switch assembly is electrically coupled to the motor and disables operation of the motor when in an open condition.

Claims

1. A seat assembly comprising:

a seat bottom;

a seat back;

a power recliner assembly mounted to the seat bottom and the seat back that facilitates pivoting of the seat back with respect to the seat bottom, the power recliner mechanism including a recliner mechanism and a motor for rotating the recliner mechanism;

a switch assembly electrically connected to the motor, the switch assembly having an open condition in which operation of the motor is disabled and a closed condition in which operation of the motor is enabled wherein the switch assembly further comprises an actuator blade that extends from the switch assembly; and

an easy entry release mechanism for actuating the power recliner assembly to a released condition in which the seat back is free to pivot toward the seat bottom independent of operation of the motor, wherein the easy entry release mechanism further comprises a cable having a first end and a second end disposed opposite the first end, a handle coupled to the first end, and a lever coupled to the second end and rotatably disposed on the seat assembly, wherein the lever has a tab that engages the actuator blade and rotates when the handle is actuated to actuate the switch assembly from the closed condition to the opened condition;

wherein the switch assembly is in the open condition when the easy entry release mechanism is in the released condition.

2. The seat assembly of claim 1 wherein the switch assembly is in the open condition when the seat back is folded against the seat bottom.

3. The seat assembly of claim 1 wherein the switch assembly is in the closed condition when the easy entry release mechanism is not activated.

4. The seat assembly of claim 1 wherein the easy entry release mechanism transmits an electrical signal for actuating the switch assembly to the open condition.

5. The seat assembly of claim 1 wherein the switch assembly is part of the easy entry release mechanism.

6. The seat assembly of claim 1 wherein the cable actuates the switch assembly.

7. The seat assembly of claim 1 wherein the actuator blade is disposed in an opening disposed proximate the tab.

8. The seat assembly of claim 1 wherein the lever is rotatably disposed on an upper mounting bracket disposed proximate the seat back.

9. The seat assembly of claim 1 wherein the lever rotates about an axis of rotation and further comprises an arm portion having an opening that receives the second end of the cable and the tab is generally disposed between the opening and the axis of rotation.

10. The seat assembly of claim 9 wherein the tab extends substantially parallel to the axis of rotation.

11. The seat assembly of claim 1 wherein the switch assembly is fixedly positioned on the power recliner assembly.

12. A vehicle seat assembly comprising:

a seat bottom;

a seat back;

a power recliner assembly including;

a lower mounting bracket assembly disposed on the seat bottom;

a recliner mechanism heart disposed on the lower mounting bracket assembly;

a torque rod that engages the recliner mechanism heart;

a motor disposed on and configured to rotate the torque rod;

an upper mounting bracket assembly fixedly disposed on the seat back; and

a recliner center freeswing mechanism disposed on the upper mounting bracket assembly;

a switch assembly disposed on the power recliner assembly and electrically coupled to the motor; and

a lever configured to rotate with respect to the recliner mechanism heart that engages and actuates the switch assembly;

wherein the switch assembly disables operation of the motor when the recliner center freeswing mechanism is disengaged from the recliner mechanism heart.

13. The seat assembly of claim 12 wherein the lever is rotatably disposed on the upper mounting bracket assembly, wherein the lever actuates the switch assembly between a closed position in which operation of the motor is enabled and an open position in which operation of the motor is disabled.

14. The seat assembly of claim 12 wherein the switch assembly disables operation of the motor when the seat back is pivoted toward the seat bottom.

15. The seat assembly of claim 12 wherein the switch assembly enables operation of the motor when the recliner center freeswing mechanism is reengaged with the recliner mechanism heart.

16. The seat assembly of claim 12 wherein the switch assembly is disposed between the motor and the power recliner assembly.

17. The seat assembly of claim 12 wherein at least a portion of the switch assembly is disposed above the torque rod.

18. The seat assembly of claim 12 wherein the switch assembly disables operation of the motor when the seat back is fully folded toward the seat bottom.

19. A method of controlling operation of a vehicle seat assembly having a power recliner assembly for adjusting the position of a seat back, the power recliner assembly having an electric motor, the method comprising:

releasing a seat back to freely pivot toward a seat bottom; and

disabling operation of the motor when the seat back is released;

wherein a lever that rotates with respect to a recliner mechanism heart is configured to engage and actuate a switch assembly to disable operation of the electric motor, wherein the lever is coupled to a second end of a cable that has a first end coupled to a handle, wherein the lever has a tab that engages an actuator blade of the switch assembly and rotates when the handle is actuated to actuate the switch assembly from the closed condition to the opened condition.

20. The method of claim 19 wherein the switch assembly has an open condition in which operation of the motor is disabled and a closed condition in which operation of the motor is enabled;

and

an easy entry release mechanism for actuating the power recliner assembly to a released condition in which the seat back is free to pivot toward the seat bottom independent of operation of the motor;

wherein the switch assembly is in the open condition when the easy entry is activated.