Rotatable seat belt buckle mounting bracket for a vehicle seat adjuster with a catcher bracket buckle brace

• US 5,507,552 A
• Filed: 01/04/1994
• Issued: 04/16/1996
• Est. Priority Date: 01/04/1994
• Status: Expired due to Term

• Current Assignee: Lear Corporation
• Original Assignee: ITT Corporation (ITT, Inc.)
• Inventors: Ineich, Jeffrey D., Crawford, Stephen D.
• Primary Examiner(s): Brown, Peter R.
• Application Number:
  US08/177,257
• Time in Patent Office: 833 Days
• Field of Search: 297/216.1, 297/472, 297/473, 248/429, 248/430, 248/548
• US Class Current: 297/216.1
• CPC Class Codes: B60N 2/02246 Electric motors therefor
• CPC Class Codes: B60N 2/067 by linear actuators, e.g. linear screw mechanisms
• CPC Class Codes: B60N 2/0705 omega-shaped
• CPC Class Codes: B60N 2/0715 C or U-shaped
• CPC Class Codes: B60N 2/075 roller-less
• CPC Class Codes: B60N 2/1803 with independent front and/or rear adjustment
• CPC Class Codes: B60N 2/233 by linear screw mechanisms
• CPC Class Codes: B60N 2/4221 due to impact coming from the front
• CPC Class Codes: B60N 2/42709 involving residual deformation or fracture of the structure
• CPC Class Codes: B60N 2/68 Seat frames
• CPC Class Codes: B60R 22/26 secured to the seat

Abstract

A track assembly for a vehicle includes an upper track slidably mounted in a lower track. A seat belt buckle mounting bracket is attached to the upper track and connects a fixed seat belt to the upper track. The seat belt buckle mounting bracket includes first and second angularly disposed legs, with the first leg attached to the upper track and the second leg attached to a fixed seat belt buckle. The attachment structure mounts the seat belt buckle mounting bracket in a first, normal operating position in which the second leg of the bracket extends upward from a side wall of the upper track. The attachment structure permits the seat belt buckle mounting bracket to rotate from the first position under a force applied through the fixed seat belt to a second position in which the second leg of the bracket is substantially aligned with the longitudinal axis of the upper track to place the first and second legs of the bracket in tension with the applied force. The second position provides a strong geometry position for the seat belt buckle mounting bracket. The attachment structure also includes a catcher strap connecting the seat belt buckle mounting bracket and upper track to the rear torsion bar or tube to increase the ultimate load before failure, and to transfer the load in a manner so that the load is shared between the buckle bracket and the rear torsion bar for subsequent transmission to the rear riser.

Claims

1. In an adjustable track assembly supporting a seat of a vehicle from a floor pan of the vehicle, the track assembly including an inboard lower track and an outboard lower track adapted to be anchored to the floor pan of the vehicle in a stationary manner, an inboard upper track and an outboard upper track adapted to support the seat, the inboard and outboard upper tracks movably mounted with respect to the inboard and outboard lower tracks, means for selectively, reciprocally, adjusting each upper track with fore and aft movement relative to the corresponding stationary lower track, at least one torsion member connected between the inboard and outboard upper tracks, a seat belt buckle and seat belt buckle attachment means for attaching the seat belt buckle to the upper track, the seat belt buckle attachment means comprising:

catcher bracket means connected between the upper track and the torsion member for transferring at least a portion of a high load force through the seat belt buckle and the upper track to the torsion member.

2. In an adjustable track assembly supporting a seat of a vehicle from a floor pan of the vehicle, the track assembly including a lower track adapted to be anchored to the floor pan of the vehicle in a stationary manner, an upper track adapted to support the seat, the upper track movably mounted with respect to the lower track, means for selectively, reciprocally, adjusting the upper track with fore and aft movement relative to the stationary lower track, at least one torsion member connected to the upper track, a seat belt buckle and seat belt buckle attachment means for attaching the seat belt buckle to the upper track, the seat belt buckle attachment means comprising:

catcher bracket means connected between the upper track and the torsion member for transferring at least a portion of a high load force through the seat belt buckle and the upper track to the torsion member, wherein said catcher bracket means includes an elongated catcher strap having first and second ends with apertures formed adjacent each end, said catcher strap having a longitudinally extending loop, such that said aperture in said first end is disposed coaxially with respect to said aperture in said second end and said loop is disposed around said torsion member, and a fastener, disposed through said coaxial apertures of said catcher strap, for connecting said seat belt buckle to said upper track.

3. In an adjustable track assembly supporting a seat of a vehicle from a floor pan of the vehicle, the track assembly including a lower track adapted to be anchored to the floor pan of the vehicle in a stationary manner, an upper track adapted to support the seat, the upper track movably mounted with respect to the lower track, means for selectively, reciprocally, adjusting the upper track with fore and aft movement relative to the stationary lower track, at least one torsion member connected to the upper track, a seat belt buckle and seat belt buckle attachment means for attaching the seat belt buckle to the upper track, the seat belt buckle attachment means comprising:

catcher bracket means connected between the upper track and the torsion member for transferring at least a portion of a high load force through the seat belt buckle to the torsion member;

an attachment member having first and second angularly disposed legs, the second leg adapted to be connected to said seat belt buckle; and

means for fixedly attaching the catcher bracket means and the first leg of the attachment member to the upper track in a fixed, normal operating position and for allowing rotation of the attachment member with respect to the means for fixedly attaching to a second position relative to the upper track in response to a predetermined force applied to the attachment member through the seat belt buckle, wherein the first and second legs of the attachment member are placed in tension when in the second position.

4. The seat belt buckle attachment means of claim 3 wherein the attachment member is an integral, one-piece attachment member.

5. The seat belt buckle attachment means of claim 3 wherein the second leg of the attachment member is disposed at an obtuse angle with respect to the first leg thereof.

6. The seat belt buckle attachment means of claim 5 wherein in the first, normal operating position, the second leg extends upward from a side wall of the upper track.

7. The seat belt buckle attachment means of claim 6 wherein in the second position, the second leg of the attachment member is substantially coaxial with the longitudinal axis of the upper track.

8. The seat belt buckle attachment means of claim 3 wherein the means for fixedly attaching further comprises:

a rivet mounted through an aperture in the first leg of the attachment member and a coaxial aperture formed in the upper track.

9. A seat belt buckle load transferring apparatus for a seat in a vehicle having a floor pan, said seat having an upper track moveable longitudinally with respect to a lower track, at least one torsion member connected to the upper track and a seat belt buckle, the seat belt buckle load transferring apparatus comprising:

an attachment member having first and second angularly disposed legs, the second leg adapted to be attached to the seat belt buckle;

means for fixedly attaching the first leg to the upper track of the seat in a fixed, normal operating position and for allowing rotation of the attachment member with respect to the means for fixedly attaching to a second position relative to the upper track in response to a predetermined force applied to the attachment member through the seat belt buckle, wherein the first and second legs of the attachment member are placed in tension when in the second position; and

catcher bracket means connected between the upper track and the torsion member by the means for fixedly attaching, said catcher bracket means for transferring at least a portion of a high load force through the attachment member and the upper track to the torsion member.

10. The seat belt buckle load transferring apparatus of claim 9 wherein said catcher bracket means further comprises:

an elongated catcher strap having first and second ends with apertures formed adjacent each end, said catcher strap having a longitudinally extending loop, such that said aperture in said first end is disposed coaxially with respect to said aperture in said second end and said loop is disposed around said torsion member; and

said means for fixedly attaching including a fastener, disposed through said coaxial apertures of said catcher strap, for mounting said attachment member to said upper track.

11. The seat belt buckle load transferring apparatus of claim 9 wherein the attachment member is an integral, one-piece member.

12. The seat belt buckle load transferring apparatus of claim 9 wherein the second leg of the attachment member is disposed at an obtuse angle with respect to the first leg thereof.

13. The seat belt buckle load transferring apparatus of claim 9 wherein in the first, normal operating position, the second leg extends upward from a side wall of the upper track.

14. The seat belt buckle load transferring apparatus of claim 9 wherein in the second position, the second leg of the attachment member is substantially coaxial with the longitudinal axis of the upper track.

15. The seat belt buckle load transferring apparatus of claim 9 wherein the means for fixedly attaching further comprises:

a rivet mounted through an aperture in the first leg of the attachment member and a coaxial aperture formed in the upper track.

16. The seat belt buckle load transferring apparatus of claim 9 further comprising:

front catcher bracket means connected between the upper track and the lower track for transmitting high load forces imparted to the upper track to the lower track, the high load forces tending to move the upper track in a forward direction with respect to the lower track.

17. The seat belt buckle load transferring apparatus of claim 16, wherein said front catcher bracket means further comprises:

an elongated front catcher strap having first and second ends and a longitudinally extending loop between said first and second ends, said loop disposed around said front torsion member and said ends connected to said lower track.

18. The seat belt buckle load transferring apparatus of claim 9 further comprising:

said seat further including a power seat apparatus for said vehicle having inboard and outboard spaced track assemblies, each track assembly formed of said lower track fixedly mounted to the vehicle floor and said upper track slidably disposed within each lower track;

a front tubular torsion member connected between the upper tracks of the inboard and outboard track assemblies;

said attachment member further including a seat belt buckle attachment member connected to a rear portion of the inboard upper track;

a drive motor having first and second rotatable output shafts, said output shafts respectively extending toward opposite inboard and outboard upper tracks;

a lead screw disposed between each upper and lower track;

a drive block fixedly mounted to each lower track and threadingly engaging the lead screw;

gear means fixedly mounted to each upper track and coupling one of the motor output shafts to one lead screw, the gear means including a plurality of meshingly engaged gears, at least one gear formed of a plastic material and having a metallic inner annular member fixedly attached to the lead screw; and

front catcher bracket means, disposed in a force transmitting position between the front torsion member of each upper track and each lead screw associated therewith, for transmitting high load forces imparted on the upper track around and bypassing the gear means, wherein said high impact forces tend to move the upper track in a forward direction with respect to the lead screw.

19. The power seat apparatus of claim 18 wherein said catcher bracket means further comprises:

an elongated rear catcher strap having first and second ends with apertures formed adjacent each end, said catcher strap having a longitudinally extending loop, such that said aperture in said first end is disposed coaxially with respect to said aperture in said second end and said loop is disposed around said torsion member; and

a fastener, disposed through said coaxial apertures of said catcher strap, for mounting said seat belt buckle attachment member to said inboard upper track.

20. The power seat apparatus of claim 18 further comprising:

said seat belt buckle attachment member having first and second angularly disposed legs, the second leg adapted to be attached to the seat belt buckle; and

means for fixedly attaching the catcher bracket means and the first leg of the seat belt buckle attachment member to the inboard upper track in a fixed, normal operating position and for allowing rotation of the attachment member with respect to the means for fixedly attaching to a second position relative to the inboard upper track in response to a predetermined force applied to the attachment member through the seat belt buckle, wherein the first and second legs of the attachment member are placed in tension when in the second position.