Seat Track Easy-Entry Actuation Mechanism

• US 20120223561A1
• Filed: 11/23/2010
• Published: 09/06/2012
• Est. Priority Date: 11/26/2009
• Status: Active Grant

• Current Assignee: Magna Seating Incorporated (Magna International Incorporated)
• Original Assignee: Magna Seating Incorporated (Magna International Incorporated)
• Inventors: Hurst, Nelson E. III, Jagtap, Prasad D., Carroll, Jeffrey P., Calhoun, Jonathan A., Persad, Rabindranath
• Granted Patent: US 8,757,720 B2
• Time in Patent Office: Days
• US Class Current: 297/344.1
• CPC Class Codes: B60N 2/12 slidable and tiltable
• CPC Class Codes: B60N 2/22 the back-rest being adjustable B60N2/2878 takes precedence

Abstract

A seat track assembly includes a seat track operable for sliding movement of a seat assembly. A towel bar pivots a drive lever unlocking the seat track and allowing sliding movement of the seat assembly within a range of comfort positions. A stop lever pivots between a lowered position and a raised position. In the lowered position. the stop lever engages a stop bracket secured to the seat track preventing the seat assembly from moving forward of the range of comfort positions. A cam pivots in response to pivotally moving a seat back to a dump position. Pivoting the cam pivots the drive lever unlocking the seat track and pivots the stop lever to the raised position spaced above the stop bracket to allow sliding movement of the seat assembly to an easy-entry position forward of the range of comfort positions.

Claims

1. A seat track assembly for a seat assembly having a seat back pivotal between a generally upright seating position and a forward dump position, said seat track assembly comprising:

a seat track operable for sliding movement of the seat assembly between a range of comfort positions and an easy-entry position, said range of comfort positions including a forward comfort position and said easy-entry position disposed forward of said forward comfort position;

a towel bar pivotally coupled at a first pivot to said seat track;

a drive lever pivotally coupled to said seat track at said first pivot and coupled directly with said towel bar for pivotal movement therewith, said drive lever unlocking said seat track and allowing sliding movement of the seat assembly within said range of comfort positions in response to actuating said towel bar;

a stop bracket fixedly secured to said seat track;

a stop lever pivotally coupled to said seat track at said first pivot, said stop lever pivotal between a lowered position engageable with said stop bracket in said forward comfort position and a raised position allowing sliding movement of the seat assembly to said easy-entry position; and

a cam rotatably coupled to said seat track at a second pivot and coupled directly with said stop lever, said cam engaging said drive lever to unlock said seat track and pivoting said stop lever to said raised position allowing sliding movement of the seat assembly to said easy-entry position in response to pivotal movement of the seat back to the dump position.

2. A seat track assembly as set forth in claim 1 wherein said cam includes a first cam end for selectively engaging said drive lever to pivot said drive lever and unlock said seat track and a second cam end opposite said first cam end operatively coupled to said stop lever for pivoting said stop lever to said raised position spaced above said stop bracket to allow sliding movement of the seat assembly to said easy-entry position.

3. A seat track assembly as set forth in claim 2 wherein said seat track includes a lower fixed track adapted to fixedly secure the seat assembly to a floor of an automotive vehicle and an upper movable track slidably coupled to said lower fixed track and fixedly secured to the seat assembly for providing fore and aft sliding movement of the seat assembly between said range of comfort positions and said easy-entry position.

4. A seat track assembly as set forth in claim 3 further including a latch mechanism operatively coupled between said upper movable track and said lower fixed track for selective operation between a locked condition preventing sliding movement of said upper movable track relative to said lower fixed track and an unlocked condition allowing sliding movement of said upper movable track relative to said lower fixed track.

5. A seat track assembly as set forth in claim 4 wherein said drive lever includes a first end directly coupled to said towel bar and an opposite second end operatively coupled with said latch mechanism for actuating said latch mechanism between said locked and unlocked conditions in response to pivotal movement of said towel bar.

6. A seat track assembly as set forth in claim 5 wherein said stop lever includes a first end pivotally coupled by said first pivot to said upper movable track and an opposite second end defining a hook portion for engagement with said stop bracket to prevent sliding movement of the seat assembly to said easy-entry position.

7. A seat track assembly as set forth in claim 6 wherein said cam includes a torsion spring coupled between said cam and said upper movable track for biasing said cam in a first direction disengaged from said drive lever.

8. A seat track assembly as set forth in claim 7 wherein said cam include a pin projecting from said second cam end received in a slot formed in the second end of the stop lever for actuating said stop lever between said lowered position for engagement with said stop bracket and said raised position spaced above said stop bracket in response to rotation of said cam.

9. A seat track assembly as set forth in claim 8 further including a cable having a first end adapted to be coupled to the seat back and a second end coupled to said cam for rotating said cam in response to pivotal movement of the seat back to the dump position thereby actuating said latch mechanism to said unlocked condition and said stop lever to said raised position to allow sliding movement of the seat assembly to said easy-entry position.

10. A seat assembly for use in an automotive vehicle, said seat assembly comprising:

a seat cushion adapted to be mounted to a floor of the automotive vehicle;

a seat back pivotally coupled to said seat cushion for pivotal movement between a generally upright seating position and a forward dump position at least partially overlying said seat cushion;

a seat track operatively connected to said seat cushion for providing selective fore and aft sliding movement of said seat assembly between a range of comfort positions and an easy-entry position, said range of comfort positions including a forward comfort position and a rearward comfort position, and said easy-entry position disposed forward of said forward comfort position;

a latch mechanism operatively coupled to said seat track for movement between a locked condition preventing sliding movement of said seat assembly and an unlocked condition allowing sliding movement of said seat assembly;

a towel bar pivotally coupled at a first pivot to said seat track and operatively coupled to said latch mechanism for actuating said latch mechanism between said locked and unlocked conditions;

a drive lever pivotally coupled to said seat track at said first pivot and coupled to said towel bar for pivotal movement therewith for actuating said latch mechanism to said unlocked condition allowing sliding movement of said seat assembly within said range of comfort positions in response to pivotal actuation of said towel bar;

a stop bracket fixedly secured to said seat track;

a stop lever having a first end pivotally coupled to said seat track at said first pivot and an opposite second end, said stop lever pivotal between a lowered position wherein said second end engages said stop bracket in said forward comfort position and a raised position wherein said second end is spaced above said stop bracket to allow sliding movement of said seat assembly to said easy-entry position; and

a cam pivotally coupled to said seat track at a second pivot and operatively coupled to said stop lever, said cam including a first cam end for engaging said drive lever for actuating said latch mechanism from said locked condition to said unlocked condition and a second cam end for pivoting said stop lever from said lowered position to said raised position allowing sliding movement of said seat assembly to said easy-entry position in response to pivotal movement of said seat back to said dump position.