Seat Folding Apparatus with a Passive Radio Frequency Link and Foreign Object Detection System

• US 20080024316A1
• Filed: 10/05/2007
• Published: 01/31/2008
• Est. Priority Date: 07/20/2005
• Status: Active Grant

• Current Assignee: Lear Corporation
• Original Assignee: Lear Corporation
• Inventors: Ghabra, Riad, Tang, Tom, Nathan, John
• Granted Patent: US 7,808,394 B2
• Time in Patent Office: Days
• US Class Current: 340/667
• CPC Class Codes: B60N 2/002 Seats provided with an occupancy detection means mounted therein or thereon detection means responsive to presence or absence of children B60N2/266
• CPC Class Codes: B60N 2/3002 back-rest movements

Abstract

A seat folding apparatus is provided with a passive Rf frequency link that requires that a person be within a certain limited distance from the vehicle to operate the seat folding mechanism. A foreign object detection system, such as a plurality of weight sensors, is provided in the seat to detect foreign objects on the seat.

Claims

1. A system for controlling movement of a seat disposed in a vehicle that has a power-driven folding apparatus with a motor that is controlled by an electronic seat control module, the system comprising:

a plurality of weight sensors disposed on the seat base that provide a foreign object signal to the electronic seat control module when a foreign object of more than a predetermined weight is disposed on the seat base; and

the electronic seat control module providing an interrupt signal to the power-driven folding apparatus that prevents operation of the power-driven folding apparatus after the foreign object signal is received from one or more of the weight sensors.

2. The system of claim 1 wherein the electronic seat control electronically monitors the plurality of weight sensors to sum an electrical characteristic of each of the weight sensors and also monitor changes in the sum prior to or during operation of the power-driven folding apparatus to thereby detect the foreign object on the seat.

3. The system of claim 1 wherein the foreign object signal may be provided if a lightweight object of less than the predetermined weight is disposed on the seat and the operation of the power-driven folding apparatus causes the lightweight object to be pressed against the seat to the extent that the pressure applied to the weight sensors meets or exceeds the pressure applied by the foreign object of more than the predetermined weight.

4. The system of claim 1 wherein the plurality of weight sensors are secured to a substantially rigid support structure of the seat that supports a foam bun and the weight sensors are disposed below the foam bun.

5. The system of claim 4 wherein the plurality of weight sensors are attached to a sensor tray that is installed on top of the support structure.

6. The system of claim 4 wherein the support structure has at least one opening and the plurality of weight sensors are attached to a sensor tray that is installed beneath the support structure with the weight sensors being aligned with the at least one opening.

7. The system of claim 1 wherein the electronic control module monitors the weight sensors until a desired position is obtained at the end of a seat folding operation.

8. The system of claim 1 further comprising a switch for initiating operation of the power-driven folding apparatus that establishes a latched circuit for the folding apparatus that is released when the seat folding operation is completed, or the foreign object signal is received by the control module.

9. The system of claim 1 wherein movement of the seat is prevented in the event an ignition key is in the vehicle ignition switch.

10. The system of claim 1 wherein at least one manually actuated switch may be actuated to override the power-driven folding seat operation and allow manual folding of the seat.

11. In the system of claim 1, further comprising an operator perceptible output mechanism that communicates status information regarding the status of the power-driven folding apparatus in the event operation of the power-driven folding apparatus is interrupted.

12. The system of claim 11 wherein the operator perceptible output mechanism is a display panel on a key fob Rf transmitter and receiver system.

13. The system of claim 11 wherein the operator perceptible output mechanism is a display panel on the vehicle.

14. The system of claim 11 wherein the operator perceptible output mechanism is an audio output.